Automatic shift function of hand since the transmission

In recent years, which has the function of automatic shift hand - the one transmission (AMT), the domestic heavy commercial vehicle manual hoist boom, developing rapidly, the loading rate is rising. By drivers, however, the use of arm for gear transform mechanical manual transmission (MT), despite the challenges, but as a result of product performance has a comparative advantage is very outstanding, therefore, under the current national conditions, is chainb lock a heavy commercial vehicles of the most widely used variable speed device. In the field of heavy MT gearbox, the loading rate is the highest gear more modular MT transmission. From the point of product technical characteristics, modular MT gearbox, generally there are two kinds, one kind is times file (sectional match) combined, the other is a half (plug-in match) combined. 1.1 times the combined in terms of the structure of products, times file combined MT gearbox, is back in the main transmission series to install a second vice transmission (high and low), the main transmission gear by the increase in the number 1 times. Gear transmission ratio increased by numerical value is equal to the product of the main transmission gear ratio and auxiliary transmission ratio, number of logarithmic is less than the gear and gear. Therefore, the size of the gearbox casing is shortened, it shorten the length of the shaft, but stiffness increased, thus increasing the transmission capacity.

Chain performance parameters of the measuring device

Chain blocks the development of the performance parameters of the measuring device when the mechanical lifting transportation machinery research institute, Beijing chainb lock sound Gu Yuan Yuan Fang hand chain hoist is a kind of enormous quantity wide manual lifting equipment. When chain ascension rated load, hand in hand on the zipper to exert certain pulling force, the force will show that the size of the chain of the machine efficiency. We developed measuring device is used to measure the hand pull in the chain, the machine efficiency and continuous motion test and development. 1. The measurement problems in the past, before hand to pull the heavy lead method is used to measure, namely to hang up the chain to be tested in the product test rig, equal to the rated lifting weight of load test on the hoist hook, and increase the height of 300 mm. Measurement will hand chain blocks a chain of fixed down side chain, on the hand chain of hoisting side plus the first measured rated hand gourd tension value of Jordan farmar (farmar location close to the measured gourd) as far as possible, at the same time combined with equal to the rated hand pull of 50% of the value of the additional weight. When you disengage the down side of the hand chain, observe side hand lifting chain on weight reduction, such as Jordan farmar in the midway stop or accelerated decline, should be appropriate to increase or decrease the rated hand pulling force value of Jordan hoist equipment, at a uniform rate until farmar can drop 200 mm effective stroke, is the weight of the weight is the hand to pull the measured value.

Mechanical efficiency calculation problem

Mechanical efficiency computation chainb lock is an examination questions type, as long as the students grasp the mechanical efficiency calculation problem of the problem solving skills, accurately identified which force to do the work is useful work, which total energy is doing the work force, will be able to correct the problem solving fast. In this paper, through the analysis of the general topic, for example, and the mechanical efficiency, and the students to manual hoist and summary mechanical efficiency calculation problem of the problem solving skills. A using block and tackle, the vertical case 1 in small construction site, simple lifting equipment commonly used vertical lifting construction materials, its working principle of pulley block as shown in figure 1. One will be the total weight is 4000 G n bricks uniform to 10 m high above, takes 40 s, hoist provide pulling force F 2500 n. : (1) the useful work in the process; (2) the work and power of the force F; Analysis (3) the mechanical efficiency of pulley block. (1) work is equal to the size of the forces acting on the object and the object in the direction of the force on through distance by figure 1. The figure 1 shows that useful work is the effect on the objects of the work done. As shown in figure 2, because the object in the vertical direction to do uniform motion in a straight line, so F = G, namely there W = F, h = Gh. (2) due to mechanical tension is through the direct effect on the rope of the free end, so the work force F do is work all the time. So the power of pull force F can be used.

Lever hoist wire rope testing project

The lever hoist wire rope test project, the design of the mechanical efficiency is reflect the force transmission system quality and the manufacturing quality of a project. Lever hoist industry, this project has discussed proposed hoist equipment, measurement techniques and special test bench test method, but because of its precision is not high or testing difficulties to unity and promotion. This paper introduces a method, which can conveniently and accurately calculate the chainb lock hoist wire rope mechanical efficiency. One of the chain mechanical transmission parts. Each section by the roller chain plate, sleeve, and the shaft pin pin (chain), etc. Vice many chain transmission in drilling equipment, such as the diesel engine and car, winch drive and drive wheel, etc. Its advantage is to transfer power without sliding, under high-speed and two axis center distance can be very big. Drilling equipment used in the chain of sleeve roller chain, there are more than three row and double row row, such as mechanical upload using chain. Made of metal small ring together like a rope.

Chain lever hoist is widely used

HSH lever hoist ring chain is widely used in electric power, mining, shipbuilding, construction, transportation, post and telecommunications chainb lock such as equipment installation, lifting, part drawing, bulk, bundling, line taut and welding counterpoint, lever hoist especially in narrow workplace, field aerial work and different Angle of pull more show its manual hoist. Light chain lever hoist is a kind of small, multi-purpose manual lifting, traction machine, widely used in electric power, mining, shipbuilding, construction, transportation, post and telecommunications departments such as equipment installation, lifting, part drawing, bulk, bundling, line taut and welding counterpoint, lever hoist especially in narrow workplace, field aerial work and different Angle of pull more show its superiority. HSH - DC lever hoist subminiature, ultra-low weight, easy to carry, high operating easily, ka ca can firmly fasten. A subminiature because of its structure, light weight, etc. In the place where high operation and small operation. Light goods fastening, fixed object, calibration position. On various occasions. It can be upgraded, traction, drop, calibration etc. If a particular device, not only can be used as a non linear drawing operation, and can be very convenient to choose the appropriate operating position, or in small tonnage machinery exponentially expand its load capacity, a number of machines can be used for large tonnage load in parallel.

Condition of large hoisting equipment

Condition of large hoisting equipment, marks a national engineering machinery manufacturing ability, determine the traffic construction speed and quality. Our country really started to manufacture large chainb lock machinery lifting equipment in the 70 s, after nearly 30 years of arduous exploration, has made great development. Large hoisting equipment level of design capability, manufacturing, lifting load and the intrinsic quality, mechanical properties and the contents of science and technology, continuously leapfrog development. At present, is moving toward product seriation, variety diversification, simple operation, intelligent operation and performance of modern direction. $$in recent years, our country developed manual hoist developed large hoisting equipment, and identified by authority department has been close to or reached the current international advanced level. And initially formed the development of generation, research generation, reserve generation of production pattern. Based $$$$from scratch to lay looking back the development course we may see that the first 20 years since the founding of new China, our country because do not have the ability to create large lifting equipment, lead to transportation and engineering infrastructure used imports all large lifting equipment. $$in the next few years, our country successfully developed the 38 meters high, weight of 140 tons, the hoisting with 10 tons of port portal crane M10-25 type. Used for lifting heavy weights, traction weight and tensioning of the SuoSheng, suitable for places no power supply and liquidity operations.

The role of the chain

Temporary anchor chain chain chart (people used to think that chain can only be used as a lifting and bundled goods, actually the role of the chain is far more than these, with the following two examples, chain blocks can be found more use. Use a: instead of sinking cart river don't call chuan chuan si row of demodex led states with lead in sichuan words ︸ factory in jiaozuo hoist equipment han shan mine shaft wind well temporary change in the process of the ground, because the ground sinking car enough, two cage rope no steady vehicles. They through the ground a temporary car, two stable rope hanging to the headgear pulley platforms, stabilizing the ground end of the rope rope head, two by two 5 t fixed on ground hit temporary anchor chain, need rope tension, adjust by hand chain hoist, this solution both production in need, and save a large amount of manpower and material resources, as shown in the attached figure shown in (a); (note here, steady rope tension adjustment, the small chain chain should be on the main chain). Use 2: eliminate the manual hoist cable head rotating force in the city always Chen hang 24 t skip process four mine shaft

In order to ensure the vulnerability including perfecting hoisting machinery parts and metal structure of security technology, lifting machinery safety device, lifting machinery safety procedures. Metallurgical industry with the crane has the characteristics of different, its safety technical measures are also different. Improve the crane safety technical parts, main parts, have the hook, rope and pulley and drum, brake, gear reducer and gear coupling, wheels, etc. Hook according to the structure is divided into forging hook and chip.

Lifting equipment is made up of improvement slot, vibration motor, vibration isolation system and the base, etc

Lifting equipment is made up of improvement slot, vibration motor, vibration isolation system and the base, etc. This series of hoist is the vibration motor as chainb lock source, on the improvement slot with two sets of the same type of the center line of the cross Angle vibration motor installation, and do the opposite direction from the synchronous rotation, vibration motor with eccentric block rotates at every instant position of the centrifugal force hoist equipment by the component along the casting direction for reciprocating motion, make the bearing on the shock absorber of whole body vibration, the material being thrown up in the improvement slot upward movement at the same time, the material fall into the trough, start being thrown up, this time can make a good contact with raw material and air, also can have the effect of thermal cooling. The elevator to the powder, block and short fibers of solid materials (except for a viscous and caked) can be vertical transmission, also can complete drying, cooling effect of the material. Open type, closed two structures. And we can special design

Choose steel materials manufacturing

Choose steel materials manufacturing, chain chainb lock, the main part of the chain with 800 mpa high strength lifting chain, material generally is 20 m2, medium frequency quenching heat treatment, low wear and corrosion resistance of the chain; High strength hook, general for alloy steel material, calcined play type design ensures that the slow lifting hook to manual hoist overload; Comply with the European CE safety standards.

Chain by pulling to move the chain

Chain by pulling to move the chain, manual hoist wheel rotation, the friction slice ratchet wheel, brake pressure into one common rotation, short and long axis rotation piece of gear, the tooth axis and the spline gear. So perfectly on the spline gear lifting chain wheel drives the lifting chain, thus hoist equipment promote weight. Unilateral brake friction ratchet type, can self braking under load, ratchet in spring and ratchet gearing, under the action of the brake safety work.

lifting and other materials such as wood handling operation.

Change of different auxiliary work unit can also be bulldozing, lifting and other materials such as manual hoist handling operation. In roads, especially in the construction of high-grade highway, the loader used in subgrade engineering fill dig, asphalt mixture of aggregate and cement concrete chainb lock and loading operations. And also can be a force behind the soil, ground leveling and other machinery operation traction.

Traction weights of small light lifting equipment

Also called the fairy gourd, jin does not fall, manual gourd, is a kind of simple to use, easy to carry the manual manual hoist machinery, also known as chain hoist or chain. It is suitable for small short lifting equipment and goods, the weight is generally not more than 100 t. Shell material is high quality alloy steel chain, strong wear resistance, high safety performance. Manual gourd - hoist equipment gourd refers to using human drive chain and the handle to ascend or traction weight small light lifting equipment. Can be divided into the ring chain and lever blocks, steel wire rope type two kinds.

How to tell mini electric hoist performance

Mini electric  wire rope hoist  products workshop interior often use lifting tools, but also the home of choice for heavy lifting, mini electric hoist, small size, light weight facilitate installation, operation and lifting stability. Users at the time of purchase, according to the following distinguished miniature electric hoist quality and performance.
1, click the up and down keys to observe the running interval, the interval is smaller miniature gourd better.
2, mini electric hoist body shell or high strength die-cast aluminum body stretching.lever hoist Extrusion molding thin-walled precision manufacturing. Have an independent transmission system, sealed inside two coaxial transmission gear mechanism, the use of long-life oil bath lubrication system.
3, miniature gourd with DC electromagnetic disc brake, brake torque, smooth, fast, low noise.
4, mini electric  lift hoist  control after power up and down and move around, observe the arrow keys are accurate, running up and down at the same time pay attention to rest, is there a brake sound, while looking after repose, when there is decline in the chain, if so, that friction plate over loose, or not installed properly.

Chain hoists main parts scrapped conditions

manual hoist accessories including hooks, wall panels, sprockets, flower keying gears, so siding, sheets and other gear, chain hoists to introduce you to the following main parts scrapped conditions, such as in case of retirement should be replaced.

    1) Lifting chain
A, chain wear ring diameter than the nominal size of 10%;
B, two links from the elongation of more than 3%,wire rope winch a single link from the elongation of more than 5%;
C, cracks or other harmful defects;
2) Gear
A, tooth thickness wear more than 10% of nominal size;
B, crack;
C, broken teeth;
3) friction plate wear more than 25% of the nominal size;
4) increased wear of the chain groove size, more than 10% of nominal size;
5) between the shaft and the bearing clearance is too large,chain block more than 15% of nominal size;
6) ratchet pawl and spring severe wear or corrosion;

360 degree rotating chain hoists unique advantages

360 degree rotating hand chain hoist is a kind of advanced structure, innovative design, small size, light weight, small lever force, high efficiency, good quality crane safety performance.manual block The chain hoists new design, with a quick adjustment of the position under the hook function.

360 degree rotating hand chain hoist, you can pull any angle, easy to use, high safety factor, design beautiful, rugged and compact, cranes and levers have been chromed; small weight, is the use of lighter material handling equipment for a better choice . The chain hoists unique elastic clutch technology, lifting loads at any height, high standard configuration effort lifting chain length 1.5 m, special lengths available on request preparation (chain size refers to the chain diameter) complies with the European CE safety standards.
Import chain hoists, safe, reliable, durable;load chain chain hoist safety performance is good, easy to use, easy maintenance; work, high efficiency, small lever force; advanced structure, smooth operation, used to enhance the appearance and traction, with excellent operational performance and reliability. The chain hoist traction machine is different from the ratchet mechanism, but also from the winch, in the enclosure, there are two links connected by a clamp,wire rope winch clamped wire, two pairs of clamps alternately like a human hand grasping the same live wire, depending on the different operation of the handle, respectively, to enhance traction, down or relax.

Bronze proof chain hoists instructions

1, the operation must be scrutinized before proof  chain Block  individual components and parts, including each link of the chain, in good time before use. In equipment shaft, gear daub amount of grease to reduce wear and improve extended equipment life.
2, are not allowed to use overload proof chain hoists.
     3, lifting chain requires vertical hanging weights. Chain link between individual shall have the wrong button.
4 Pull the zipper, the zipper direction must be in the same plane with the chain sprocket.
5, is strictly prohibited stayed  manual hoist s to prevent card chain.
6, pulling force must be smooth to avoid jumping chain or card chain. When they find driving difficulties, should promptly check the reason, not deadlift, but not allowed to add people afterburner, so pull off a chain or pin.
7, use a tripod, the tripod must maintain relative spacing, feet between applications rope ties a rope on the ground when the contact time, pay attention to prevent workers tripping.
8, lifting height shall not exceed the standard value,hoist equipment to prevent the chain pull off the pin, causing the accident.
9, lifting personnel are forbidden to do any work under heavy loads and walk around to avoid accidents resulting in personal injury.

Explosion-proof chain hoists classification

Explosion-proof electric  lift hoist  lifting equipment is not the only, and explosion-proof chain hoists, the same product in the job it is friction between the impact will not occur mechanical sparks to effectively prevent fire accidents, ensure that the national wealth and personal safety, but also machinery and mechanical maintenance of essential special tools.


Explosion-proof hoist and hoist the main difference is that ordinary proof chain hoists material is aluminum bronze and beryllium as the blank, chain hoists shell is also used in H62 copper alloy materials. Why use this information as proof chain hoists raw materials, mainly bronze alloy, aluminum bronze alloy does not occur when impact or friction sparks, it is very suitable for the manufacture of flammable, explosive, corrosive place under magnetic and safe to use. Mainly alloy containing 30% oxygen or 6.5-10% methane empty oxygen withstand 561LJ impact energy, the impact of 20 magnetic, neither of sparks and burning.
Explosion-proof grade is proof chain block s level is d Ⅱ AT2 to d Ⅱ AT4, d represents flameproof; II on behalf of Class II proof that Plant Explosion. C stands for C-level hazardous areas, that is, for the most dangerous region, T4 temperature class representatives, from T1-T6, T6 is to achieve the highest.
The force of friction parts chain hoists including chain hoists lifting round form, siding, bracelet wheel, hooks, gears, gear shafts are made ​​of aluminum bronze and bronze alloy made ​​of data, proof chain hoists can be widely applied the petroleum, petrochemical, gas stations,hoist and trolley oil depots, gas, chemical, military, power, mining, electronics, railways, and other potential fire and explosion hazard environments.

Electric hoist crane group conditions of use

Electric  rope hoist  crane group conditions of use
Conditions of use not only affects the group hanging electric hoist use and work efficiency, but also the life of the equipment has a great impact on the future, the following  for your group hanging electric hoist conditions of use.
     Electric hoist in what context the work efficiently for you to do the following brief introduction. If you do not pay attention to these factors the premise of their work, their work efficiency will be discounts. Many people use electric hoist, it may be the most easily overlooked premise of this factor in the working environment, but in fact the environment will affect their work.
Ambient temperature: -20 ℃ ~ +40 ℃
Work rail system: Intermediate JC25%
Weight class: JC40% when the intermediate rail system working group hanging electric  lever hoist  30% weight reduction, namely heavy duty rail system JC40% of electric hoist. Heavy duty rail system JC40% of electric hoist is used in relatively heavy work load often requires a higher safety factor rating or the case.
Electric hoist structure reducer: A three fixed idea helical gear roll structure, gears and gear shaft via a heat-treated alloy steel, box, cover made ​​from high quality cast iron, fitted tightly sealed. Reducer self-contained unit, handling is extremely convenient.
Control Box: The intercept in case of emergency the main circuit, and with vertical stroke limiter off the fire protection devices. Ensure the safe operation of the electric manual hoist. Electrical components, long life, reliable operation.

Electric wire rope hoist single multi reel

Electric wire rope  lever hoist  drum major play in lifting mechanism hoisting or hauling bodies and winding rope.
Electric hoist wire rope electric hoist drum where the number of layers can make single or multi-layered. Normally they use a single hoist drum. Single hoist drum surface is usually cut helical grooves, a rope wound in the groove, the contact area between the rope and the drum increases, the pressure reducing unit, and to prevent friction between adjacent wire, extending the life of the rope .
Spiral groove is divided into two kinds of shallow grooves and deep grooves, generally use more standard slots, only when there is the use of rope brackets dangerous only when using trench hoist drum. Single drum hoist pulley block with single spiral groove; twin pulley reel double spiral grooves symmetrically distributed.
Multilayer winding drum  manual hoist  for lifting height is large, while the electric hoist roll length and limited circumstances, such as cranes, electric hoist drum winding layers generally made smooth, and its inner rope by the outer layer extrusion wire in the winding process the friction between adjacent loops, reduce the life of the rope. Moreover, constant tension on the rope, the rope on the drum with the load torque varies layers, resulting in instability of the load torque. To improve the hoist wire rope on the drum in the released state, to improve the life of the rope,hoist equipment and there is also a spiral groove around the hoist multi-roll.

Four features of frequency electric hoist wire rope

1, can reduce the starting and stopping of the shock: wire rope winch  with a smooth operation frequency performance, which can reduce the start and stop time of the impact, especially for the installation of precision molds, etc. are not allowed vibration in the work environment.
2, can be set according to demand the lifting speed: to pay Lifting speed at 1/10 of the rated speed to be set between the rated speed, in order to select the most suitable operating speed.
3, improve work efficiency: wire rope  lift hoist  inverter under no-load, can hoisting speed at rated speed to 1.5 times the rated speed is set between, improve the operating speed under load, in order to improve work efficiency.
4, can easily set the car speed: the motor can be running through the inverter frequency control, you can easily make the motor run at low speed run, improve the accuracy of positioning operation,hoist equipment jog operation can also be carried out.

The smooth wire rope electric hoist

Wire rope lifting equipment as the main connectors, directly affects the quality of the use of equipment, at present, the domestic electric  chain block  is mainly used in glossy rope, the following details.
Smooth wire rope is usually caused by a few strands sub rope twisted around the core with a rope made ​​of crane and lifting operations are used in glossy rope round cross-section. Hemp rope core core material, asbestos core wire cores. Hemp core use most. According to the manufacturing process technology around the twist number of different bundles of wire rope can be divided into single rope around the twist, double twist around Smooth Smooth wire rope and wire rope triple twist around three categories.
Smooth double twist around the wire,lever hoist and wear resistance because of its moderate around, lifting up the dish operations are widely used. Double twist steel wire rope around the wire twisted into shares in accordance with the direction and strands twisted into rope F Shun to be divided into different rope around the smooth, glossy text wrapping around the bright wire rope and hybrid species.
        With electric hoist the increasing use of time, equipment except wearing parts, easily damaged wire rope part, to remind the majority of users, the use of electric wire rope hoist  to pay attention to the equipment before and after the inspection, if found damaged or abnormal parts, please replacement parts or contact the manufacturers to solve.

Electric wire rope hoist coupling material selection

Coupling of different materials  rope hoist  carrying capacity are very different, usually electric hoist gear couplings carrying capacity than other couplings, metal flexible couplings original carrying capacity than the original non-metallic elastic rope hoist couplings,manual block the following details for you.
Mainly to transfer power coupling and transmission wire rope hoist or hoist control movement-based coupling is obviously different. In focusing conditions, should not choose hoist drive couplings, will increase the electric hoist coupling size and weight. Short time overload,load chain the best selection of safety couplings to reduce size. Under variable loads of drive shafts, when the load change is large, you should choose a good cushioning and shock absorption coupling elastic wire rope hoist.
Rigid coupling specially made easy, light weight, low cost, but two of the neutral axis demanding, flange couplings,manual hoist packers couplings, wire rope electric hoist lifting flange couplings most widely used.

Explosion-proof electric hoist electric idea how to deal with

Explosion-proof electric hoist applications rather special, in general, relatively high demand for proof. Explosion-proof electric  lift hoist  proof grade is divided into three and four explosion, the explosion of different products corresponding to different environments.
All electrical components electric motor are mounted in explosion-proof enclosure. Including explosion-proof enclosure consisting of several parts, end caps, bearing cover, shaft, terminal box and cover, terminals, terminal screws, seals, screw terminal sets, compression nut, etc., explosion-proof enclosure fastening bolts connecting the number of non-missing, each bolt with spring washers to prevent self-loosening,wire rope winch otherwise they will lose proof function.
Introduction of cable diameter electric motor with terminal box match the diameter of the inlet ring, good line, pressed by the compression nut seals the cable diameter and the inner ring and the seal between the outer diameter and junction box no gap between the seat bore so as to achieve proof function, brake inlet ring diameter Φ6.
Explosion proof enclosure between the mating surfaces of the joint surface, such as the base and cover of the Mouth of the mating surfaces, axis and the axis of the inner cover mating surface,manual hoist terminal screw threaded sleeve with the mating surfaces, etc., can not be bump-proof combination of surface and rust.

Wet work environment requirements for use of electric hoist

Under normal circumstances in wet environments hoist, requiring no more than 85% humidity, electric  wire rope hoist  protection rating of IP44, but with the use of the growing number of requests and the field, continues to improve, more and more occasions humidity more, such as nuclear power plants, as well as with high-pressure water washing dust pollution edge nuclear devices and other occasions, in this case using the electric hoist protection must be increased, therefore, electric hoist motor and electrical protection class IP55 equipment should be transported and Health, the following details for you, humid working environment hoist requirements.
First, in a wet environment, for 10kw electric hoist and trolley  should be noted that the above increase preheated drying device. Secondly, if it is in the open air hoist operations, especially on the electrical motors and other hardware should be additional rain cover to prevent rain and other factors cause the motor to burn other failures.
About electric hoist used in a wet environment is mainly required above two points,hoist equipment consult carefully before use requirements and precautions to ensure safe use.

Chain hoists performance mutations cause decreased security

Chain hoists because of their small size and other simple maintenance and other advantages, the use of more extensive range of original, and because mutations chain hoists performance,lever hoist security incidents are growing decline, leading to the emergence of failures in addition to the device itself quality problems, the there are many objective reasons such as improper use of the following detailed analysis of your performance chain hoists mutations security reasons for the decline, for your reference:

1, chain hoists lifting weights over from the weight of the provisions;
2, chain hoists or oblique horizontal pull, pull too high or too low;
3, on the use of chain hoists lifting chain bend or kink is still used;
4, tossing hoists;
5, chain hoists main force component corrosion, cracks, lack of strength or significant plastic deformation;
6, rope or tie optional low base connection method is not correct, then do not tie securely;
Mutation  manual hoist  performance, safety performance reasons for the decline of the two
An opponent pull hoist performance principles, institutions are not familiar with easily removable;
2, install chain hoist brake, the installation is not reliable;
3, have not been unloaded after maintenance, overloading test that is put into use;
4, long chain hoists work load; work environment is complex, rubs increase the weight;
5, the use of chain hoists can not concentrate, resulting card chain, tripping, kink;
6, the use of the rear end routine maintenance, improper storage.
When you use a  chain Block  to remind eye rigorous inspection equipment for problems, operators work should concentrate, to observe, rational operation, after use to be more equipment to do proper maintenance to maintain a permanent chain hoists performance.

Electric hoist overload limiter works

Electric hoist overload limiter is one of important safety devices, such as weight lifting process over rated, then overload limiter will cut off the electric hoist lifting loop, the electric  chain Block  to stop heavy lifting, so as to protect operating personnel and equipment safety, the following for you to explain the working principle of overload limiter.

Overload limiter balancing hoist pulley mounted on the housing means and between the end plates, end plates electrically with one end of the housing to a positioning spindle and the stopper plate, positioning the spindle head equipped with an eccentric shaft extension bracket, balance one end of the pulley device hanging in the eccentric shaft extension bracket head, the eccentric bottom bracket with dowel pins, eccentric side of the bracket support plate, the upper loading a proximity switch, eccentric bracket overhang bracket with the eccentric shaft center positioning hole centers offset mandrel 3 mm. When lifting heavy overload, the eccentric bracket shell around the  lift hoist  side panel positioning mandrel rotates counterclockwise in to a preset distance proximity switches, proximity switches off the contactor line package lifting circuit, cutting off electric hoist lifting motor power, the electric hoist stops running, play overload limiting role in achieving the safe operation of the crane, improve the reliability and security.
Hoist overload limiter are one and split into two categories, such as the need to replace the overload limiter encounter such situations, to consider the electric hoist load, the case was Joseph wire rope electric hoist rope should also consider factors such as magnification and diameterload chain , to avoid overload limiter after the purchase can not be used without situation.

Flip method of construction hoist floating roof tank

In recent years, electric  wire rope hoist  is used for the construction of floating roof tank gradually frequently choose to use electric hoist for floating roof tank construction, because it is its applicability, especially electric hoist flip-law in this area to better highlight its advantages.

Flip electric hoist has obvious advantages and applicability, especially for floating roof tank construction, upgrading flip method is used 10,000 m3 external floating roof tanks, floating roof tank construction requires high maintenance inconvenience, under normal circumstances selecting slow smooth gourd work.
Electric hoist flip method is more secure, stable, easy to adjust, enhance each lap siding completed just 3-5min.hoist equipment No aerial, safe and reliable construction, welding tank wall were carried out on the ground, the boss low intensity, there is no need to use heavy lifting equipment (crane). Applicability of the construction without water restrictions. Easy control panel tank geometry deformation and ensure the accuracy, thereby ensuring the panel welding quality and avoid water-filled suits and other process is not conducive to control panel (especially thin) deformation of the shortcomings. Floating roof phased production, has little effect on the tank construction, ease of cross-operation of each process and pipeline operations, electric  lever hoist  flip method to improve the efficiency of labor and equipment, machinery efficiency.

Diversification of electric hoist operation mode

According lift hoist  structure is divided into fixed and running style, no matter what form will need to run on the beam or crane work, but with the requirement to improve the device's operating environment determines the diversity of electric hoist operating mode , the following Detailed.

Electric  rope hoist  operating mode changes on: trolleys can work in large curvature track, and trolley wheels can be equipped with multi-beam models, such as the most common H-type, U type, etc., all framed car, you can in a single beam run, can also be run on dual-beam track.
Operating agencies parameter changes: lifting height increases, according to the different requirements, up to 120 meters, changing the speed of running and lifting, running speed can also be made ​​into double speed.
Changes in the structure: with multiple roping,chain block you can use the electric hoist lifting hook, the field can be used for high temperature metallurgical hoist, to solve the user due to space constraints and plant design, low headroom hoist and so on.
Hoist motor parameter changes: According to user's requirements, the motor voltage, frequency, series protection and insulation class and other new designs. Such as: voltage 220V415V440V660V, frequency 50HZ, 60HZ; protection class IP54, IP55IP56 etc.; insulation level up to class H.

Flexible wire rope electric hoist lowering

Wire rope electric  wire rope hoist  he most frequently appearing as an accessory, but scrapped wear situation is more common, the following Detailed elastic rope electric hoist lowering standards for discarding.

The rope hoist for slight damage, especially when all of the strands in a good balance of stress in the usual test methods may not be displayed clearly. However, this may cause damage to the rope strength is greatly reduced. Therefore, the discovery of subtle damage to any internal inspection should be carried out, be identified. Once found damaged, the rope should be scrapped.
In some cases, chain block the elastic rope is significantly reduced. If you continue to use, there will be security risks. Elastic rope reduction is difficult to find, the elasticity generally mainly in: rope diameter decreases; rope pitch elongation; pressed against each other due to various parts, wire and between reducing the gap between strands; strands recess appeared fine brown powder. Although not found broken wire, but obviously difficult to bend wire rope. Its diameter is reduced due to wear than simply reduced diameter due to faster. This situation will result in a rope under dynamic loading sudden rupture, it should be immediately scrapped.
Tips, whether newly purchased or wire rope hoist electric hoist is in use,wire rope winch before use, after they need to check the status of the rope, such as abnormal, should immediately stop replacement wire rope to continue using.

Using the remote control electric hoist Precautions

Electric  rope hoist  remote control operation is to achieve the major components used directly manipulated by the operator, here to introduce you to the use of electric hoist remote control when you pay attention to what matters?

1, you can not hoist cables hanging keys or other items strong pull.
2, once the remote control button insensitive action,hoist and trolley please stop using it.
3, in order to adjust the cable length keys, do not wound bundle.
4, the operating and release the key switch electric hoist, do not throw, hit to avoid the physical equipment and other operating personnel.
Finally reminded users who encounter a sudden power outages and other power outages, voltage maintenance circuit will start working. In this case, after power is restored, even if the operation of the remote control button switches, electric  manual hoist  does not work. At this point need to press the emergency stop button to stop the reset state to lift the suspension, electric hoist to work.

How to prevent overloading using chain hoists

Chain hoist overload use is more common, failures due to overloading is also more common,manual block the following shows you how to prevent overloading chain hoists, to avoid similar accidents.
Prevent overloading chain hoists can be used on the device plus overload limit device, this time, add the gourd is also called overload device against overload chain hoists. Overload prevention chain hoists main purpose is safe to use. If you pull the weight exceeds the rated load requirements chain hoists, chain hoists will be at work is stalled, not a security risk, it would not do any harm to the device.
Anti-overload  manual hoist  operation is also very simple, if already in the anti-overloading heavy chain hoist load range, this time to pull the hand chain hoists are not working, at a standstill. General anti-overloading chain hoists using the occasion is very extensive, outdoor site, high-end production workshops, warehouses, power plants and other of the anti-overloading chain hoists are used.
In order to ensure the safe use of customers, each anti-overloading  chain Block  in the factory will go through rigorous testing regulation. Meet the requirements before leaving the factory, inspection is very strict. Please the majority of customers read the instruction manual before use.

Wire rope hoist brake selection to local conditions

Wire rope hoist brake is one of the essential parts, according to the wire rope hoist selection and use of environmental products and other practical needs to choose, the following detailed description of your brakes to choose how to do local conditions.

Wire rope chain Block  brakes must first consider the type and standard specifications, such as: lifting mechanism, luffing mechanism must be set to normally closed brake, walking or turning mechanism can be used normally closed brake.
Second, consider the use of premises, such as: Brakes installed there is enough space, the choice of block, arm band brake or disc brake, space is limited value, can be used within the shoe or clamp disc brakes.
Finally consider supporting wire rope lift hoist s used in the environment, there are strict requirements for oil leakage occasion use pneumatic brakes, the ambient temperature can be used insulation demanding high level of electro-hydraulic brakes. For special occasions, should be based on need for additional brake additional features. In the low temperature environment, you can use the electro-hydraulic thrusters of the heater. Conversion process for starting and braking when there are strict requirements, the installation of the brake limit switch for opening and closing state.wire rope winch For maintenance, adjustment difficult implementation environment, the installation of brake clearance balancing device and the friction lining wear compensation device. Additional manual brake device can be opened manually in exceptional circumstances brakes.
Wire rope  lever hoist  are many types of brake parts, the choice of when to use the environment to local conditions and other factors to consider, if you choose incorrectly, can damage the host, re-appeared personal risk and property damage.

The use of large-tonnage electric hoist what needs attention?

Under normal circumstances, more than 10 tons to 20 tons except electric hoist, which we call large tonnage type electric hoist,hoist and trolley with the use of a wide range and diversity of the field, the use of large-tonnage electric hoist demand is increasing, but in the use of Pay special attention to the following points:
1, chain electric  rope hoist  load chain large tonnage undergo heat treatment, can not be spliced ​​to use, please note that in case of unusual circumstances the chain, can not continue to use privately welding.
2 button controller comes standard with an emergency stop button. Press the emergency stop button can be easily cut off the motor circuit.
3, lift (load chain), push button control lines, power cable length as in the standard outside before purchase with the manufacturer's instructions.
4, electric hoist system chain bag canvas bags as a standard chain, steel chain bag is equipped with selected products.
5, for two Taipower hoist while lifting,manual block follow unilateral hoist rated load lifting load requirements can be selected gourd.

How to improve the capacity of wire rope hoist gear?

Wire rope hoist gear is an indispensable accessory, one bite each gear parts work with each other in order to achieve the wire rope  manual hoist  lifting, running gear directly affect the carrying capacity of hoists, the following analysis should be how to improve the capacity of wire rope hoist gear?

Electric wire rope hoist gear can be 40Cr, 40MnB material, gear surface to be treated by quenching or nitrides, at present, some domestic enterprises also used 20CrMnTi material, this material gear bending strength and contact strength is ideal.
Traditional low precision gear machining,wire rope winch carburizing quenching deformation difficult to control, after the sequence nor grinding process, it is inevitable there is gear noise, low efficiency. New materials and heat treatment method has many domestic manufacturers to promote.
Wire rope hoists used in hardened and hardened gear meshing pairs, using high-level gear shaving process, election gear helix angle of about 12 ~,load chain which are geared to improve stability and effective way. Gear box, cover design should be conducive to the absorption of noise and vibration damping, transmission bearings should improve accuracy levels.

Basic characteristics of small electric hoist

Small electric hoist people also known as "hanging miniature electric  rope hoist  ," and can only be fixed with the use of non trolley travel use. Its biggest advantage is small, economical use of space, the following details of small electric hoist basic features.
Small electric hoist as a new hoists are widely used in machinery manufacturing, electronics, automotive, shipbuilding, parts assembly, and high-tech industrial zone and other modern industrial production line, assembly line, assembly, logistics, transportation and other occasions. Especially for warehouses, docks, ingredients, hanging baskets and small work space narrower space operations, can show its advantages.

Small electric hoist basic characteristics are as follows:
     With emergency stop switch and reinforced breaking limit switches, protection class IP54,lever hoist with thermal protection device;
Freedom of movement Lightweight & compact design;
When the rope touches the limit arm, automatic stop upgrading;
Static and dynamic load sharing between activities set;
Operation on 220V household power;
Hook with safety lock 360 universal connector hook pad;
Small electric hoist or fixed column, wall-mounted jib crane "best partner." Which gourd beautiful appearance, reasonable structure, easy installation, low noise, especially suitable for workshops,chain block family, warehouses, hotels, shopping malls and other decoration and handling work.

Good lubrication to extend the life of lifting equipment

Lifting equipment is closely related to the quality of life in addition to itself, the work is routine maintenance, but during maintenance lubrication but also played a vital role in lifting equipment properly lubricated regularly to not only be more convenient to use,hoist equipment it is important is that it can extend its life.
Should be established as a manufacturing lubrication management system. Duties include lubrication maintenance personnel regulations and work rules, cleaning oil system, lubricating oil and coolant test system.
Lifting equipment lubrication management of the basic principle and the "five-set, three filtering" management approach. Five Sets: Capacity, will be one, qualitative, quantitative, regularly; three filters: collar oil filter, oil filter when the drum during refueling filtering.
Check the equipment lubrication conditions, timely solutions to the lubrication system problems; lubrication equipment and replacement of damaged parts, equipment and tools; lubrication and cleaning of oil on the recording and analysis of the situation,hoist and trolley and constantly improve the lubrication maintenance work.
Actively promote the new grease lubrication equipment, new additives, new sealing materials, new wear-resistant materials, new devices, lubrication experiments and applications of new technologies, as well as to seriously study the basics of the business and methods.
Proper lubrication to reduce friction between the equipment parts, reduce power consumption,manual hoist ease wear and extend the life of lifting equipment, full performance of the device.

Affect the life of lifting belt use and maintenance

    Lifting belt is particularly widely used sling products, materials commonly used polyester filaments, with a wear-resistant,manual hoist anti-UV, anti-oxidation effect. In addition to material on the edge, lifting with the life of the same with our daily use and maintenance is closely related to the following detailed description.
       Use lifting belt overloading can not remember when first used, you can not sling and eye damage and its connected devices, lifting devices should be smooth with no sharp edges. Secondly, do not use the strap to tighten knot or play in the mobile lifting belt and cargo must not drag.load chain Finally, be careful not to be used without jacket lifting belt carrying a sharp corners, edges of heavy loads.
       Lifting with routine maintenance should pay special attention to:
       1, high temperature applications or lifting chemicals circumstances, must comply with the instructions for use or production plant for consultation.
       2, lifting belt in acid-base environment, it should be immediately washed with water.
       3, lifting belt should be stored in dry and ventilated dedicated shelves, light and no UV radiation conditions,lift hoist not on an open flame or flammable materials nearby.

220 volt mini electric hoist Precautions

    220 volt mini electric hoist with most close to people's lives, especially in the agricultural sector,hoist equipment which replaces the traditional human transmission work, then at 220 V mini electric hoist when we should pay attention to what matters, in order to avoid the use of improper failure to introduce you to the following.
         1, the formal product comes with instruction manual, you read carefully before use.
         2, mini electric hoist is installed to meet the requirements, the installation in the ease of operation of the occasion.
         3, lifting not stayed, oblique lifting heavy objects,wire rope winch and this is all hoist avoid point.
         4, mini electric hoist work, forbids any person standing beneath the heavy lifting.
         5, please use wear thick gloves to avoid rope slip from the hands glide cause injury or stabbed.
         6, micro hoist and wire rope hoist is very similar to the use of this is to ensure that at least 3 on the rope drum circle wire rope,wire rope hoist wire rope to prevent excessive force detached from the rope drum.
         7, do not arbitrarily modify or welded mini electric hoist parts.
         8,220 volt mini electric hoist shall not in any way carry people.
         9, do not overload use.
         10, regular inspection hoist is firmly installed.
         11, the operator not to drinking, drug use, etc. operate the lifting equipment.

How the selection, purchase electric hoist

Faced with a wide variety of standard models on the market electric hoist products, as the user how selection, purchase a suitable  rope hoist   Summarize the following need to consider when buying electric hoist factors hope for your help:
One, lifting height: electric hoist as a promotion tool, would lift height has strict requirements. Therefore, the time of purchase, you should first select according to plant height of lifting height, the conventional lifting height has 6,9,12,18,24,30 m.
Second, lifting speed: an ordinary electric hoist lifting speed is divided into single-speed (8m/min) and dual-speed (8/0.8m/min) two kinds, in the absence of special requirements are often used in the case of single-speed electric hoist also CD1 is the model number, if your condition requires heavy lifting required to pinpoint the course of the case, easy to use two-speed electric  lever hoist  MD1 model.
Third, buy electric hoist should pay attention to the spacing between the upper and lower hook, because in certain plant would hoist hook spacing specific requirements.
Four, motor power: Different electric hoist motors are not the same, the same 10t electric hoist motors may also be 13KW or 7.5KW, purchase according to their different needs.
V. Voltage: electric hoist wide field of application, involving all walks of life, so the use of the voltage will be different, there are 380V 220V China industrial electricity consumption, and even 440V, 60HZ, 380V, 60HZ series of non-standard power supply.
Six, mounting: electric hoist with electric trolley can be selected,hoist and trolley that is, up and down with the trolley hoist can lift heavy objects can be moved around, and can only be fixed up and down lifting heavy objects.
Seven, buy electric hoist electric hoist must consider carefully whether formal quality and manufacturers, the quality of the main factors to be considered: the motor, wire rope specifications, hook roll media. Manufacturers whether a formal main considerations: whether they have produced relevant documents crane, such as: production under license, certificate, etc.

Use explosion-proof chain hoists to pay special attention to what?

Proof  chain block are manual hoist one of the more special, said proof chain hoists special is mainly reflected in the selection and workmanship, it is aluminum bronze, beryllium copper as the blank, gourd shell H62 copper alloy, gear must also be after heat treatment, in order to have wear resistance. It is this process of selection and special features it has the proof.


Proof chain hoists are mainly used in potential fire and explosion hazard environment, the job impact during product will not produce friction between mechanical sparks, can effectively prevent fire accidents, the use of the environment and the particularity of the field, so the explosion in the use of hand special attention should also pull hoist the following:
1 explosion-proof hoist shall not overload use.
2, should be recognized before using intact parts, transmission parts and lifting chain oiled, idling conditions are normal.
3, other than strictly prohibited to use human power operated.
4, before the explosion in the use of hoist required to confirm parts intact, smooth transmission of local and lifting chain good idling condition is normal.
     5, check before lifting hook can hang down firmly. Prohibited at the tip of errors such as heavy lifting operations.manual block Lifting chain should be hung vertically, without kink chain link, chain under double hook rack may overturn.
6, the operator should stand on the same plane with the bracelet wheel pulled to start the chain, making bracelets wheel rotates clockwise, you can make the weight increase; reverse pull start chains, weights can slowly descended.
7, proof chain hoists in the lifting process, regardless of rising or falling heavy objects, pulled to start the chain, the force should average flaccid, not too much force, so as not to hand chain jumping or snap ring.
8, proof  manual hoist   lifting weights in a prohibited personnel to do any work under heavy loads or walking, so as not to attack personnel accidents.

Electric hoist brake problems how to deal with

Electric hoist brake failure is more common,manual hoist technical staff based on years of practice experience, brake failure is due mainly to a few points:
1, brake failure:
(A) the brake pads wear cladding serious or large loss;
(2) Long stroke solenoid is stuck;
(3) the moving core and the horizontal connecting rod between the lever off;
(4) electro-hydraulic thrusters or hydraulic solenoid does not operate;
(5) the main spring failure or damage;
(6) electrical failure and so on.
2, the braking force is insufficient.
(A) the brake pads or brake wheel cladding excessive wear;
(2) there are small pieces of cladding partial loss;
(3) the main spring tune too loose;
(4) Activities hinges which are catching or excessive wear of parts;
(5) caused by loose nut adjustment lever loose and so on.
3, the brake can not be loose brake.
(1) The hinge points are stuck not rotate;
(2) The main spring tension adjustment too large;
(3) electro-hydraulic thrusters lack of oil or hydraulic oil cylinder solenoid or air is not exhausted;
(4) coil or rectifier elements burning,lever hoist low voltage or line failure.
4, easy to disengage the brakes adjusted position.
(A) the main spring adjustment too loose;
(2) electro-hydraulic thrusters working stroke adjustment Debu meet the technical requirements.
These are on the main  wire rope hoist  brake failure, hope to help you.

Three rope frayed Analysis

The hoist rope can be said that the most frequently used accessories, but also lifting the most widely used, but when the operation wire in contact with other objects, friction. In the mechanical, physical and chemical action, wire rope wear and other issues will continue to surface, a serious impact on the  lift hoist  and the whole machinery of operation and efficiency, the following is your analysis of the three main situations rope wear:
1, deformation wear
Due to vibration, collision damage caused by the rope hit the surface, called deformation wear, abrasion is a local phenomenon. If the surface of the wire rope drum impact by other objects, wire rope electric hoist lifting wrapped around each other to fight, or due to deflection pulley and roll center phenomena arising bite rope, wire rope will cause deformation wear. This deformation wear and deformation due to local press, the wire cross-section extending to the sides at the extrusion into a fin-shaped.chain block From outward appearances, wire width expansion, although much reduced wire cross-sectional area, but the local press at the steel surface material hardened, easily broken wire.
2, internal wear
In use, the rope pulley rolls or after exposure to the entire load of the pressure in the side of the rope, the plurality of thin wires can not be exactly the same radius of curvature. Same time as the rope bends, wire rope, steel wire inside the root will generate force and produce another slip, then contact stress between stocks and shares increases, the share between adjacent wires produce local indentation furrow. When repeated cycles stretch bending, is generated in the deep recesses of stress concentration was broken, constitute internal wear. Usually thin wire rope surface pressure and the pressure proportional to the tension of the same case, since the pressure receiving area are different, the pressure per unit area is different. Under pressure from the surface wear of view, the use of line contact wire rope advantageous than using point contact, the use of surface contact wire rope line contact than using more favorable. In addition, the degree of bending wire rope, velocity, internal wear on the rope are affected. Obviously, the selection line contact or surface contact type of rope is an effective way to reduce internal wear.
3, the external wear
In the course of wire rope and the pulley groove outer periphery, drum set, a top hook surface wear caused by the contact part of the external wear. The external worn rope diameter becomes thinner,hoist and trolley the outer peripheral surface is polished fine steel.
External wear of the rope to bear the load of the wire cross-sectional area decreases, the rope breaking load is reduced accordingly.
Wear a single week than the whole week wear worse, hook group it should be possible to make a single week of the wire to wear uniform wear all week. Entire length of the wire should be as far as possible uniform wear. Such as cranes wire rope used for the first medium-term, generally extend rope life 30% to 40%.

Fashion car transport chain hoists factory pay attention to what?

 For a lot of people are not familiar with  chain block, chain hoists as some areas called "inverted chain", the rules for the use of hoists and maintenance, in the preceding article has been introduced, today introduced hoists factory loading transportation pay attention to what?
       First, when loading hoists, chain hoists parts should pay attention to the center coincides with the center and the flatbed, not a wide, high and other phenomena occur and require experienced personnel and the equipment for loading bundles work.
       Second, large objects and dedicated flatbed fixed connection with flowers down chain with bolt and the column is fixed,manual hoist the track with flatbed shares in at No. 8 with a 2-4 wire, tied around the two loading, tied with a multi-strand wire must be twisted tight pull its weight to ensure that each filament force uniform.
       Finally, note that bundled lifting, non-bundled in bundles consumables or can not withstand forces above the mating surface of the exposed parts,manual block precision shaft protruding edges and pieces to be packaged protected against collision damage in transit or unforeseen circumstances.
       These are chain hoists in the loading need to pay attention to security matters.

How to check before installing hoist beam

    Before installing and using electric hoist,hoist equipment the intention is very important job is to check whether the standard I-beam, in order to ensure the normal operation of electric hoist, how to check the work, the following for you to do the following description:
       Electric hoist installation, respond beam track end, straightness and twist to check method is: Level measurement track elevation, level degree, track the location of the top face of the longitudinal inclination of its design should be ≤ 1/1000. Each 2m measuring point, full height difference of not more than 10mm; rail top surface elevation tolerance ± 10mm, the same cross section relative difference in elevation between two parallel tracks should be ≤ 10mm; should be noted that: electric  lift hoist  beam track along the longitudinal direction in the horizontal plane the bend, each measuring 2m length tolerance of ± 1mm;hoist and trolley beam lateral inclination orbit track width should not exceed 1/100; orbital welding electric welding quality should meet the relevant requirements, then the head and sides welds shall be ground smooth.
       Electric hoist can be used alone and also can be used with lifting beam or driving for use.

Two-speed electric hoist performed using six criteria

PK two-speed electric  wire rope hoist  lifting capacity of 125 kg to 2000 kg, with a single-speed and two-speed two speeds, PK two-speed electric chain hoists are widely used in machinery manufacturing, electronics, automotive, shipbuilding and high-tech industrial areas and other modern industrial, perform the following criteria should be used to ensure safety.
One, should be carefully checked before starting hoist equipment mechanical, electrical, wire rope, hanging clamp, stopper, etc. is intact and reliable.
Second, not to overload lifting.manual hoist Lifting of hand grip on the rope and objects allowed the question.
Three, two-speed electric hoist lifting an object, you must observe safety procedures rigger hook. Should be securely tied, the object should be located at the cusp gap liner protection.
Fourth, the use of trailer wire electrical switch starter. Insulation must be good. Properly pushed the button, operation,hoist and trolley attention standing position.
Five, monorail hoist the corner or near the rail track at the end, you must slow down operation.
Six, where there are operating room must have a two-speed electric hoist hand operation,manual block strict compliance with the relevant safety traffic engineering gold rules.

Upside down electric chain hoist features

Upside down electric  lift hoist  is also called "stage gourd", the name of the field associated with the use of history is nothing, why the inverted chain hoist can be applied to the stage, compared with other chain hoist What characteristics do the following description:
       Upside down electric chain hoist with 110 volt control circuit heat treatment, with screw-type limit switches, stamping steel shell, lightweight and rugged; high-strength safety hook;hoist equipment chain galvanized grease in the gear box fitted to prevent oil droplets penetrate into the arena, hoist motors sealed in aluminum rims cylindrical enclosure permanently protect motors. Upside down electric chain hoist efficient, lightweight motors, non-asbestos brake system, low energy consumption; forming heat treatment of steel chain guide plate; hanging hanging there under the limit switch device,wire rope winch the motor automatically stops to prevent the chain beyond, to ensure safety; suitable for use with various controllers and circuit distributor connected.
        Note: upside down electric chain hoist for temperature -25 degrees to 40 degrees, in the absence of fire, explosion and corrosive media environment, prohibit lifting the molten metal, toxic, flammable and explosive items.

Electric wire rope hoists serialization problem

   For now, the domestic electric  lift hoist  and other lifting industry developed rapidly, especially in the past two years, as China's economic strength gradually improved, driven by the rapid development of the lifting industry, but in comparison with developed countries, too single product variety lack of technological innovation, the specification is not complete.
       CD1 wire rope hoist is that people most frequently used one of the products, but the structural design, speed reducer, safety precautions, electrical control and other areas to consider our electric hoist comparison with the developed countries have yet to progress.load chain Wire rope hoist fewer varieties, specifications missing. Eg: CD1 wire rope electric hoist weighs only 0.5 t, 1t, 2t, 3 t, 5t, 10t these six types, lifting height coverage for the 6-30m, lifting speed :1-5t single speed of 8m / min, 10t single speed 7m/min. Although some domestic manufacturers on the basis of the development of the 10t 16t, 20t, 30t expansion of large-tonnage electric hoist series, but still can not form a more complete and reasonable wire rope hoist  products, and foreign range 0.25-80t lifting capacity and a variety of play l combination of height and lifting speed compared to there is a big gap.

Horizontal and vertical hanging hanging plate lifting clamp difference

    Plate lifting clamp called "steel clamp" is divided into two kinds of cross hanging and vertical hanging.wire rope hoist Cross hanging plate lifting clamp with horizontal distribution characteristics of lifting, lifting operations, the horizontal lifting clamp mouth pop, caught in the weight to be on the job, open, should weight the ground, the no-load case remove the steel clamp. Vertical lifting steel hanging clamp with self-locking device,lever hoist safe and reliable. Clamping speed, high efficiency. Rail clamp made ​​of high quality alloy steel, safe and reliable, fixed hanging beams, rail width adjustment quick and easy clip.
         Plate lifting clamp is mainly used in: railway, construction, metallurgy, ports, power, petrochemical, mining, automobile manufacturing, plastics machinery, pipelines and auxiliary set, slope tunnels, wells and control protection, salvage, ocean engineering, bridges, aviation, aerospace, venues and other important industries,manual hoist and infrastructure construction machinery and equipment.

Electric hoist control box work environment requirements

   Electric hoist electric hoist control box is to control the operation of the main control mechanism.hoist and trolley Mainly by the transformer, box, terminals, contactors and other components. Electric hoist control box chain with a machine quality AC contactor, the load and instantaneous overload are much improved, but the working environment of the control box there is a certain requirements before normal use.
       Control box work environment requirements:
1, ambient air temperature: -20 ℃ ~ +40 ℃.
2, the air relative humidity: lowest average humidity of 90%, with an average temperature of 25 ℃, and also taking into account variations due to temperature control box on the lift hoist  Cream.
3, in the workplace should be no violent oh one and vibration.
4, in the absence of an explosion in the use of micro-media, and medium without corrode metal and damage the insulation of gas and dust (including the point of dust).
5, no more than 2500 meters above sea level to use.
       Electric  rope hoist  control box can also be provided upon request multi-core cables of different lengths and flashlight door, opened the lid of the control box, the removable from hinge, user-dark group Aung, maintenance, control box electronics chain has to take and mechanical linkage, so that the same group of two contacts can not be connected to the circuit; each hoist control box is equipped with electrical schematics, wiring terminals are clearly consistent with the schematic diagram number, easy to use almost maintenance, wiring.

How to make the monorail car for different tracks

    Push and Pull monorail car broke two kinds of Hand car to drive bracelet, hand trolley driver to push heavy lifting, walking on the beam orbit, but according to the different requirements of the I-beam or rail may be used different, how to make the monorail car for different tracks,load chain the following explanation for your reference:
         Hand monorail car's structure is dominated by the left wall and right wall, hanging axes, hand chains, rings, shaft components. Wheel rim spacing can be adjusted by I-beam track width requirements, Hand monorail car were walking around with rollers on wall, hanging around the axis through the wall, in the use of nuts. Rings hanging shaft mounted in the center. So then manual block s hanging rings formed manually run on a crane.
         Hand monorail car by hand chain is rotated through the shaft is driven through a gear wheel Hand monorail car can walk on the track. To make Hand monorail car can be applied to different track width requirements,chain block let Hand monorail car used to adjust the washer mounted on the inside or outside wall on the way to be adjusted.

Special electric hoist use of premises

Following is a brief introduction of special electric  hoist equipment  are used in what place?
       Special electric hoist use of premises processing establishments are mainly large-scale construction, installation engineering electric chain hoist, electric chain hoist tunnel, bridge construction with large-tonnage electric chain hoist, ship repair electric chain hoist,wire rope winch Metallurgy, high-temperature environment the use of electric hoist.
       Special features are the use of special equipment, material properties and use electric chain hoist, small size, light weight, and hanging upside down and 360 ° optional lifting multiple properties. Metallurgy explosive environment using electric chain hoist with high quality material used is aluminum bronze and beryllium as the main raw material, lifting chain with 80 high-intensity lifting chain temperature, corrosion resistance is a high-strength lifting chains can be galvanized, black,hoist and trolley polishing and other processing methods, which is also called chain hoist electric hoist suitable for all types of anti-riot places.

Classification manual hoist

 Manual hoist lifting small in the most popular lifting tools, due to its own characteristics that make it easy to carry, so by the lifting industry's favor, manual hoist lever force can only be used as a power source for people not allowed use as a starting power than the lift. Can be divided according to type of manual hoist chain hoists and  lever hoist  two categories.
        In fact, if the environment in accordance with chain hoists scope can be divided into: ordinary chain hoists and chain hoists riot. Lever hoist Depending on the type and structure of the two main, wire rope and chain hoists chain hoist.
        Chain hoists and lever hoists are used to enhance the human heavy, not any longer operating handle; operation should let the rest handle freedom follower, not jamming. Must choose the appropriate size of the load tonnage gourd. Lever hoist applies to: shipbuilding, electric power, transportation, construction, mining, telecommunications and other sectors of the equipment installation, lifting items, mechanical retraction.  manual hoist   shell material is high quality alloy steel, extremely resistant, high safety performance. Chain hoists used in factories, mines, construction sites, wharves, docks,hoist and trolley warehouses and other places for installation of equipment, lifting goods.

Hoist the working relationship between the parts

       Since the use of electric  chain block  with increasing frequency, so it is necessary to understand each staff member and the electric hoist accessories working relationships between components. Today, for example to let wire rope hoist hoist together to understand the working relationship between the parts.
       Commonly used CD1 type electric hoist, the main structure there is gear, operating organizations, drum equipment, hook devices, couplings, flexible cable current into the device, limit switch, motor with cone rotor motors, set the power and braking power in one, meet the precision handling, sand boxes and die, machine maintenance, and other fine job requirements.
       MD1 model electric hoist is a two-speed electric hoist, the main structure there is gear, operating organizations,hoist equipment drum equipment, hook devices, couplings, slow drives, flexible cable current into the device, limit switch, industrial and mining enterprises , storage terminals and other places necessary hoist equipment.
       Electric hoist each other to contain various accessories are indispensable, such as the need to replace damaged parts original parts,wire rope winch in order to ensure the normal long-term use electric hoist.

Explosion-proof electric hoist large degree of common components, interchangeability

        Proof  wire rope hoist  used in flammable gas or vapor and air form explosive gas mixture. Explosion-proof electric hoist is mainly divided into three and four full-explosion-proof motor, explosion-proof electric hoist is disassembled by a number of components can be individually composed, the use of flexible, easy to maintain and repair is very convenient, and can shorten the repair time period, large degree of component commonality, interchangeability.
        Explosion-proof electric motor by a  lever hoist ,  explosion-proof control box, control buttons, and other related accessories are separate flameproof important structural composition. Explosion-proof electric hoist reducer standard modulus cylindrical gear, so ease of maintenance. Reel is running up and down lifting hoist rope to tighten up one of the most important parts. Guide rope helped  manual hoist  can be a good play to its superior performance. Explosion-proof hoist a large degree of component commonality, interchangeability.

Crane wire rope maintenance points to note

(1) the period of use rope and use of a great relationship,wire rope hoist it should be done according to the requirement to use, not drag, throw, allowed the use of overload, are not allowed to take place at an acute angle to make rope bent down drastically changed not allowed speed, to avoid shock loads;
(2) when the rope with rust and grime with a wire brush to and oiled;
(3) use of four months each rope oiled once oiled is best to use hot oil (50 ℃ or so) soaked rope core, and then wipe off excess grease;
(4) should be placed after a good rope disc clean, dry place,wire rope winch not overlapping stacked to prevent sprains;
(5) ends with a wire rope fastened or low melting point alloy weld, can also be used hoop hoop tight, so as not to loose rope;
(6) use, if the surface of the oil droplets extruded wire rope, wire rope has expressed considerable force to bear,rope hoist then increase the load should stop and check, if necessary, replaced with new wire rope.

Standard chain hoists safety rules

1 Normative references The following standards contain provisions which, through reference in this standard,chain block constitute provisions of this standard. At time of publication, the editions indicated were valid. All standards are subject to revision, and parties to this standard should investigate the possibility of the latest version of the following standards.
2 Scope This standard specifies the design of chain hoists, use, care and maintenance rules and standards for discarding the main components. This standard applies from the weight of 0.5-20 t, general purpose spur gear drive mechanism chain hoists, chain hoists other structures should also refer to types of use.
3, chain hoists general rules
3.1 each product must be accompanied by product use and maintenance manual, the production license tag and product certification.
3.2 product should have a clear,manual hoist durable signage.
3.3 non-overloaded crane lifting or diagonally. Prohibit buried in the ground or hanging pull condensation weight on the ground.
3.4 Suspension chain hoists supporting points must be solid, stable.
3.5 hanging, tied with a rope and chain safety factor shall be not less than 6.
3.6 is strictly prohibited under the rebate to the lifting hook lifting heavy chain
4, chain hoists using rules
4.1 Check before lifting
4.1.1 The parts must be intact, transmission parts and lifting chain oiled, empty running normally.
4.1.2 does not allow heavy hook hook hook tip.
4.1.3 Lifting chain is not twisted and knotted, double row chain hoists shall not be flipped to the next hook assembly.
4.2 Handling Precautions chain hoists
4.2.1 Operation should first try hanging, when the weight off the ground, and if the normal operation, reliable braking. Before continue lifting.
4.2.2 When operating above shall not stand heavy operation, nor place heavy objects lifted in the air after leaving the scene.
4.2.3 lifting process, and forbids any person to walk under the weight or stay.
5, chain hoists maintenance and repair rules
5.1 Daily inspection and maintenance
5.1.1 Check the lifting chain without excessive wear,lever hoist corrosion, deformation and external damage.
5.1.2 Check all rotating parts rotation is flexible, not loose fasteners.
5.1.3 Check the wear and deformation of the hook. Hook should be no cracks, sharp, burrs, corrosion, warping and twisting and other harmful defects.
5.1.4 the transmission parts should be regularly grease, brake friction surfaces must be kept clean and free of grease between, in order to ensure reliable braking performance.
5.1.5 Lifting chain lubricant coating should be used frequently and should not be tainted dirt and other debris to prevent people lifting belt sprocket and deposited in the cavity, affecting the normal engagement.
6, the main components of scrap chain hoists standard
One of the main components of the following conditions should be scrapped
6.1 Hook
a) section wear more than 10% of nominal size;
b) cracking;
c) dangerous section or neck plastic deformation;
d) hook mouth size deformation increases more than 15% of the nominal size;
e) torsional deformation of more than 10 degrees.
6.2 Lifting chain
a) Chain wear ring diameter than the nominal size of 10%;
b) 11 links from more than 3% elongation,hoist equipment the elongation from a single part of more than 5%;
c) cracks or other harmful defects.
6.3 Gear
a) tooth thickness wear more than 10% of the nominal size;
b) cracks; broken teeth

Hardware significant export-oriented development tools industry

  With China's integration into the global economic environment as well as to accelerate the process of the rapid rise of economic power, China has become the world's most dynamic economic regions.manual hoist Chinese economic facilities were perfect, industrial development has been relatively mature and low labor costs, has become the world's manufacturing center of the comparative advantages of hardware, hardware manufacturing export-oriented development of distinctive characteristics.
      Center to enhance the
      The first in recent years, overall growth in exports of metal products: The main hardware products (such as: electric hoists, chain hoists), export growth is higher than output growth, higher sales growth in the domestic market; major hardware appliances full bloom, only power tools, hand tools,manual block construction hardware products of these traditional categories of export products increased very high, and before the export share of small kitchen electrical products and bathroom products export growth in 2004 is also very obvious. Huge market and the center of gravity will further attract multinational hardware manufacturing center transfer to China.
      Operation of capital within the industry will become more active cooperation between enterprises will be significantly strengthened
      In the global competitive environment, in order to obtain a favorable competitive position and enhance competitiveness, industrial capital industry is running another theme. From the capital perspective, the main features of the current expansion in the increase of capital. From the competition point of view, inter-enterprise cooperation in the sharing of resources increases.
      Enterprises will further exacerbate the polarization
      The next few years will be a high-speed hardware industry shock period, this high-speed shocks the direct consequence of the current hardware kitchen brands to expand the trend of polarization camp. The next few years is expected to really be able to survive in the market is absolutely no hardware business is now so much. However, this high-speed hardware industry will bring tremendous opportunities shock, shock results will make the market more rational operation.
      Sales channels will undergo profound changes,load chain channels increasingly fierce competition between
      As the domestic oversupply of hardware products, quality, pressure, sales channels has become a key competitive factors, the parties to the channel increasingly fierce competition. On the one hand, manufacturers strengthened the control on the retail end, and strive to reduce sales cycles, saving cost of sales, the sales channels to professional development, enterprise sales model can simultaneously accommodate diverse towards the direction of the market. On the other hand, sales industry trend towards the development of large chain stores rising status, control of the industry enhance its ability to participate and were mainly caused by a manufacturer-led price competition. Large retailers with its broad market coverage, purchasing scale and cost advantages in product pricing, payment delivery in terms of control of the production enterprises will be increasingly strengthened.
      Meanwhile, the international market for our hardware products will be the progressive development and changes in the quality of Chinese products, packaging, delivery time will have higher requirements, or even gradually extended to the production process and product development, product and environmental protection , energy resources, human environment together.
      Price-based competition in the market will be shifted to high-quality, high-tech products
      As competition in depth, the various stages of hardware industrial chain profit margins were compressed, downward movement is reduced. More and more companies recognize that price competition alone can not build the core competitiveness, not the long-term direction of development, in an effort to explore a new path of development.
Many hardware companies increased technical input to the development of new products with high technological content, product differentiation as a permanent solution for enterprise development, to seek new market demands, the establishment of a new economic growth point (such as electric hoist and enter to other similar industries), in order to achieve sustainable development of enterprises.
      Integration of domestic and foreign enterprises will further accelerate
      Domestic hardware companies in order to improve their strength more quickly expand the international market, through various means to accelerate the integration and foreign enterprises to improve product quality, enhance competitiveness. Continue to expand in the United States, Japan and other traditional markets, while countries in Southeast Asia, the Middle East, Russia, Europe, Africa, will provide full bloom.
      Overall, China's hardware industry will continue the momentum of structural adjustment, but will continue to be some bright spots.hoist equipment Hardware companies polarization of the situation will only get worse, have to adapt to market competition, companies will compete to exit the market through different channels, and hardware giant will gradually emerge.