Hanging electric hoist the main rail channel

    The universal application of  rope hoist ，  hoist itself makes people understand. But perhaps hoist framework channel, it sounds very strange, but the main track channel is hanging electric hoist important accessory essential to the process, one of the following main rail channel knowledge to do the following description, for your reference:
         Hanging  Wire rope hoist  lifting beam carrying member end multi GB707 hot rolled channel is also used to take the station bearing support member and a variety of other non-weight bearing member. The GB706 rolled steel I-beam cranes were widely used in the main components of the main weight-bearing beams. Combined with steel and steel I-beam which can be a variety of main beam welding, the electric hoist hanging below the main beam-beam for the job.
         Special attention is required, do not light beam used for electric hoist crane girders or run track, because of its thin and wide flange, its strength unbearable wheel pressure, easily lead to derailment hoist falling accidents. Therefore GB706 general hot-rolled I-beam is the preferred electric hoist crane, also widely used in addition beam hanging rail and electric hanging overhead lifting equipment running track.

Electric hoist circuit speed control method

Generally speaking hoist winding main flux change the basic price adjustment, by the conversion of electric shock and switches with no pre-conceived with good hungry winding no connection with the beginning, being  Wire rope hoist  through the beginning of internal transformation, increase or reduce the main winding turns, and then change the winding terminal voltage and DC to reach conditioning task main flux, the speed change means. Other facilities at this price adjustment form without adjuvant, is by far the most economic price adjustment path is broadly used in electrical materials price adjustment.
         There shunt resistance is the price adjustment path, its mandate form similar to the above principle, which is being hoist winding which is connected in parallel with the internal resistance starts, it really is only a strong core coil inductance, the same is the result of conversion switches, there will be no resistance with the number of turns of the coil windings in parallel with the  rope hoist  to change path inductance values.

Two-speed electric hoist Organization

PK-type two-speed  Wire rope hoist  mainly by the lifting mechanism, functioning institutions and electronic control of all three components, let me introduce you to leave these three institutions it:
       1, the  lift hoist ：  the ability to jointly as mobile crane control to use. To be driven by two-speed hoist brake, transmission and extract composition entangled four installation, drive brake mounting braking effect for the fan, fan braking effect of cage-shaped electric effect, the title of Class F insulation.
       2, the operating mechanism: PK type electric chain hoist with manual and automatic operating mechanism of the points, or the adoption of a flashlight to indirect traction drive chain running car, auto car brake operating mechanism consists of electric fan effect, two cylindrical roller drive accelerator and steering components.
       3, the electronic control: PK-type two-speed  rope hoist  electrical installation is divided into indirect control and switching contactors direct control in two ways.

Down chain check points Special Considerations

1, the inverted  load chain  sprocket plate, pour card, if deformed and distorted chain, not having to use.
2, the manual should're down chain zipper strip just below, straining to be symmetrical flaccid, not straining too much so that the chain thump or snap ring,
3, the author must know parade down chain lifting tonnage, the weight of the hanging objects,  wire rope  should be used with inverted chain, not having overrun use.
4, the hanging objects necessary toggled acute angle, angular should pad is good, there is no school for prospective hand indirect or chain taut rope knot or slipknot.
5, the vertical lifting required when lifting, no quasi-hanging mobile objects, explosive flammable objects such risks.
     If one-sided from the appearance was not able to review the barbs can test tone is being adopted when lifting the way, there is the extended use of the tonnage manually inverted  load chain  and so on.

How to identify when the optional electric hoist motor is good or bad

      People know  lift hoist  the "motor" is one of the most important accessories, like the heart of the human body, we can see the importance of the motor, then buy  wire rope hoist  how do we distinguish between good and bad motor, the following for you to make the following Introduction:
       The motor structure is very complex consists of nine parts, they are the electric hoist motor shield body, cutter drive, dual-chamber airlock segment erector, dump bodies, the latter supporting devices, electrical systems and auxiliary hoist equipment .
        Rope hoist  motors are generally a maximum diameter of 6.28m, length 65m, of which electric chain hoist motor shield body length 8.5m, supporting electric hoist equipment after a long 56.5m, total weight of about 406t, total Configurable Power 1577kW, maximum torque 5300kN m excavation maximum propulsion 36400kN, the narrowest driving speed of up 8cm/min.

Explosion-proof electric hoist accessories lubrication method varies

In addition to hoist  wire rope hoist  their life quality, and our daily use and maintenance is closely related to the process of lubrication and maintenance is the most important, but because each  lift hoist  parts and structural differences, lubrication method is also different same as the following example to proof electric hoist to explain as follows:
         1, the wire rope and the drum surface lubrication method is applied, using wire rope lubricant grease.
         2, hook pulley bearings / wheel main squeeze into the oil, oil-based lubricants name is calcium.
         3, the  Rope hoist  lifting and running the motor with lubrication method applied, you should use calcium sodium base grease lubricants.
         4, lifting, running with reducer lubrication method is injected from the injection hole, lubricating oil should use 50 # machine oil.

Electric chain hoist control lever

  Wire rope hoist  control lever to use them, once due to reasons such as when power outages, voltage protection circuit will start working. In this case, when the power is restored after, even if the operation button switches, electric chain hoist is not working. Press (release) to reset the emergency stop button to release the stopped state.
         1, key switch keystrokes are not flexible when do not use.
         2 Do not  rope hoist  cables hanging keys or other items strong pull cables.
         3, in order to adjust the cable length keys, do not wound bundle;
         4, if you do not comply with these instructions may result in personal injury or equipment damage;
         5, the operation of  wire rope hoist  and release the key switch, do not throw, hit prevent physical equipment and other operating personnel;

Metallurgy electric hoist essential preparatory work before installation

Metallurgy electric hoist  Wire rope hoist  is actually improving products, suitable for high temperature environment, the risk of explosion, full of sulfuric acid and corrosive gas applications, the following metallurgical hoist introduce you to essential preparatory work before installation.
       1, carefully read the instruction manual and electric hoist with other random files.
       2, according to the packing list and acceptance, and carefully check the metallurgical hoists for damage during transportation situation missing parts.
       3, clear the tread surface of the electric car oil or rust paint.
       4, due to the special circumstances of metallurgical  rope hoist  used must understand the installation site, ready to install facilities.
       5, according to the instructions required to lift and run reducer refueling and filling hole density to prevent leakage.
       In order to ensure safe use of the above points is essential before installing hoist metallurgical preparations, welcome new and old customers to provide comments or suggestions to supplement together perfect product knowledge.

Frequency electric hoist phase asynchronous motor drive

Wire rope hoist frequency control mainly through the AC induction motor vector control inverter system to achieve. Electric chain hoist with belt loop speed torque, flux closed loop vector control method for electric chain hoist drive motor speed, which can be variable speed electric hoist to meet the operating characteristics of the work on the rope hoist  performance and work efficiency has been greatly improved, greatly reducing the operating time of accidents and dangerous.
Frequency  rope hoist  system is composed of the main core driver for driving three-phase asynchronous motor, three-phase asynchronous motor is a multi-variable, nonlinear and strong coupling system.
Electric chain hoist with torque loop speed, closed-loop flux vector control system is mainly through the MCU as the master, which has a frequency generator module and high processing power. Therefore, this system is suitable for small size, embedded inverter system. Mainly applicable frequency electric hoist three-phase AC induction motors and DC machines.

Electric hoist control box work environment requirements

    Rope hoist  control box main transformer, box, terminals, contactors and other components, the control box is to control the operation of the main control electric hoist mechanism, and its importance for the  lift hoist  control box work environment, there are strict requirements.
      Electric hoist control box chain with a machine quality AC contactor, the load and instantaneous overload are much improved, more suitable for frequent operation of lifting appliances need protection made of high quality cold rolled steel sheet stretch forming, electrostatic spray and so on.
      The following is the electric hoist control box work environment requirements, offers you:
      1, no more than 2500 meters above sea level to use.
      2, the ambient air temperature: -20 ℃ ~ +40 ℃.
      3, 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 hoist Cream.
      4, workplaces must be oh no violent one and vibration.
      5, 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.
       wire 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.

Reversed type electric chain hoist Features

  There is a electric hoist can be used upside down, on the stage and dedicated to exhibitions and other places dedicated  Wire rope hoist   known as "Stage electric hoist" also known as  lift hoist , electric chain hoist upside down style.
      Reversed type electric chain hoist is in strict accordance with touring exhibitions requirements designed surfaces are black after treatment, based on pros and cons of two-way and all-weather use and design, with adjustable screw limit switch, reliable High performance is the result of galvanized chain,  load chain  rust.
Anti-reverse type electric chain hoist rings as long as the hook hook or fixture ceiling beams can lift loads. Applicable to temporary construction sites, stage, theater and other places. If the hoist body hanging on the beam, then you can follow the general electric chain hoist use.

Multi-lift hoist and Hoist equipment the difference

In fact, multi-hoist is a  Hoist equipment ，  Hoist and hoist the biggest difference is that it has electric hoist and electric hoist features two products can be used for any angle of moving, lifting, loading and unloading, is also widely used in small residential, high-rise building decoration, hanging slabs, digging soil and other units or individuals mentioned essential common machinery. So called "multi- lift hoist ."
      Hoist has a transmission capacity, high hoisting height, stable and reliable, high safety factor, and simple operation. Multi elevator can be divided into DTS-30 multi-hoist and DTS-50 multi-hoist. There DTS50-80-A, DTS50-80-B, DTS30-80-A, DTS30-80-B four different types of parameters. Mainly divided into two kinds of single and three phase power supply to use. Multi elevator nominal weight of 300 ~ 600kg, 500 ~ 1000kg. Maximum lifting height: 100m. Enhance the speed of 8m/min, 5.5m/min. Rated voltage: 220V; 380V. Motor power, respectively: 1.5Kw, 1Kw, 1.5Kw, 0.4Kw.

73 parts chain hoists

manual hoist, looks ordinary, compact, easy to use, but if you really dissect chain hoists, which is composed by the 73 parts,  takes you into the mysterious seemingly simple yet complex hand Pull chain block  internal structure:
1 hook; 2 double reed; 3. Ended rope clip
4 no head rivets; 5.  load chain ; 6. Nameplate
7 Phillips screws; 8 spring washers; 9. Casing
10 Hexagon flat nut; 11 wall panels; 12. Roller tablets
13 gears; 14. Tetradentate minor; 15 five tooth axis
16 circlip; 17 spline bore gear; 18. Hook beam
19 rod; 20. Ball; 21 set screws
22 bearing outer ring; 23. Guide column; 24. Lifting sprocket
25 The left wall; 26. Detent pins; 27. Pawl
28. Detent spring; 29.   Brake seat; 30. Friction plate
31 Hand chain; 32. Cotter pin; 33. Steel sleeve
34 right wall; 35. Groove flat hexagonal nut; 36. Hanging chain plate
37 baffle; 38. Baffle pin; 39. Revocation
40 Secure the bezel; 41. Latch; 42. Ratchet
43 connecting ring; 44. Lift wheel; 45. Bracelet wheel cover
46 Cruise baffle; 47. Tour axle; 48. Closed under the framework
49 cruises; 50. Needle; 51. Hex bolts
52 ring; 53 next frame; 54. Revoked under the framework
55 beams; 56. Cotter pin; 57. Horizontal pin
58 Cruise rack; 59. Hook shaft; 60. Shaft Collar
61 Shaft washer; 62. Upstream shaft wheel; 63. Cruises
64 needle; 65. Cruise ring; 66. Framework under
67 Shaft washer; 68. Downstream shaft wheel; 69 The next cruise ring
70. Needle; 71 next cruise; 72. Shaft Collar
73 under the hook shaft.

Wire rope hoist contactor How does it work

  Contacts play a controlling role of  rope hoist   it shows the importance of the whole work, a brief introduction of electric hoist contactor is how it works, and in the course of precautions for your reference:
      Electric hoist contactor is to work through the magnet suction. Large contact area of   the magnet, so pay attention at work first thing to note is that non-skew, can not be jamming, and the magnet surface should be kept clean.
      Secondly; electric hoist need special inspection before use coil without no leakage, fixed is solid, arc hood required intact, no card contacts, arc suppression coil is not shorted.
     Finally guarantee contactor contacts contact width should be more than three-quarters of the contacts shall maintain adequate open distance and overtravel. Anyway, turn contactor mechanical interlock should be adjusted appropriately when a contactor contact the contact,  Wire rope hoist  another contactor contacts is not closed.

Wire rope hoist track down deflection, lateral bending, deformation

   General may bring their own  Wire rope hoist  electric sports car, you can move up and down about flexibility, with rail and other metal beam structure, recently a lot of new and old customers to reflect hoist track down deflection, lateral bending, deformation, etc., and now do a brief introduction, only your reference:
      Through customer reflect the most common metal rail deformation problems mainly in the mid-span girder and cantilever deflection occurs under, side bends, main girder webs appear super wave transformation required by the girder, end beam frame structure consisting of pairs moldings tolerance deformation. Under the main beam deflection deformation of the trolley tracks appear slope, slope increased lifting trolley climbing resistance, leading to run slipping, even after you stop running automatically slip.
      But as time goes on, because the metal structure in the manufacturing process residual stress generated during the installation or use of a defect in the process of long-term work load, electric hoist metal rail there will inevitably be different degrees of camber and upturned was reduced, and thus appear under torsion deformation.
      Specific solutions, information in the purchase of electric hoist manufacturers should use the I-beam with  rope hoist  or track models, for their own design should pay attention to the main beam to have a certain degree of pre-designed pre-camber, designed with cantilever end upturned certain degree of elastic deformation of the main beam of the curve in terms of load or full load are more gentle.

Electric hoist load chain heat treatment requirements is the key

Electric hoist  load chain  heat treatment requirements is the key


By the open-hearth steel load chain, electric or basic oxygen furnace smelting. Steel must be killed steel, weldability and cold resistance, and contains a sufficient amount of alloying elements, in order to ensure the chain hoist after appropriate mechanical properties after heat treatment.
        load chain is alloy steel. Chain allows manufacturers to stabilize during use, to prevent strain aging embrittlement, the content of aluminum alloy to be not less than 0.02%. Steel grain size was measured in accordance with BG 6394, should reach the austenite 5 or more.
        Wire rope hoist  lifting chain heat treatment is one of the most critical steps, lifting chain  heat treatment according to a detailed explanation: the chain shall withstand the heat treatment step in the manufacturing process completed before the test force test. All links should be 0.02dn carburized layer above the surface hardness should not be less than 550HV, core hardness is about 380HV.

wire rope hoist common faults of reducer

 the Hoist equipment field frequently used parts of their reducer is indispensable part of one brief  wire rope hoist  gear reducer in the course of the common faults, failure causes and solutions:
      A common gear reducer with percussion - failure causes: a, broken teeth b, bearing damage c, convex tooth surface collision point, or stick with high iron and other objects d, gear axial movement collide
Troubleshooting methods: a, replaced with new gear b, replaced with new bearings c, tooth repair, removal of foreign body attached to the tooth surface d, by adjusting pad isolated
      2: Bearing temperature heat - failure causes: a, bearing inner and outer rings with tight b, bearing slide wear c, no oil
Fault elimination method: a, measuring shaft with the hole, according to the standard gearbox with shaft and repair holes b, new ones bearing c, timely refueling, lubrication schedule
      3, gear reducer sound uneven - causes: a, big gear runout. b, or other shaft driving gear shaft bending. c, gear shifting of the collision with the box.
Fault elimination method: a, light repair tooth, severe ones gear. b, with the point of the flame straightening heating. c, with a spacer to adjust the axial clearance.

The load chain lifting techniques

load chain is lifting gear, rigging are mainly used  manual hoist ,  rope hoist ,  lever hoist   etc., as the main component, can also be used alone, lifting chain made of high quality alloy steel casting, good wear resistance, high temperature resistance, long life. Specializing in the production chain Ling eagle is 8.0 high strength lifting chain, durable, easy to wear.

1, the chain belongs oversized, its greatest advantage is in the same diameter, the rated load of up to 25%, that is in the same rated load, smaller diameter.

2, the chain has a higher surface hardness and better toughness. Chain links and attachments more wear.

3, the chain, and has the same level only parts to each other.

4, the chain temperatures up to 200 degrees to 100% of rated load, 200 degrees to 300 degrees is 90%, 300 degrees to 400 degrees is 75%.

5, the chain elongation A minimum of 20%.

In addition to the  load chain   the alternative is often used a rope, chain and wire rope can say is different in different conditions, the choice of appropriate species, on balance, in order to achieve the best results.

Hand down chain card chain causes

   Manual Chain Block down frequently encountered in the course of their work when the drive Chain Block can not afford to pull up a situation does not work, how to deal with such problems appears to make  Chain Block   work  Use of such tools in the operating personnel of such products when fundamentals of the structure is not very understanding, for general mechanical failure there is a little more difficult at row. Manual Chain Block card load chain is what  How to deal with
      Hand down load chain card load chain for the following reasons:
1, prior to the lifting load chains shun no good, making a  load chain  twist chain riser card in the unit above.
2, lifting load chain with metastatic cases, continue to use, because the lifting load chain deformation and the original contact with the guide wheels certainly make life difficult, it will be stuck.
3, after use, Chain Blocks readily lost on the ground into the Chain Blocks load chain guide wheel, in the use of the time did not promptly removed, so pull the drive chain will cause lifting load chain stuck.
     Hand down  load chain  card load chain solutions commonly used methods:
1, before hanging  manual hoist   should be hung vertically, to see whether the lifting load chain knot, twist load chainapproach is good along the chain and then be able to use properly.
2,  manual hoist   lifting load chain deformed as immediately after repair or scrap processing, should not continue to use this type of  manual hoist   lifting operation will bring significant on accidents.
3, the use of stents should be looking after the  manual hoist  hook, can not arbitrarily throw should be timed in such a load chainlifting chain lubricant on the smear is not oxidized or rusted.

"Forged" preferred material hoist gear

  Rope hoist  gear material usually a "forged" because forged itself has high strength, good toughness, ease of manufacturing, heat treatment and so on.
Let me introduce soft tooth surface gears and hardened gear materials and the use of the difference.
      1, wire rope hoist  soft tooth surface gear
      Representing tooth gear tooth surface hardness> = 350HBS, commonly used in carbon steel and alloy steel. This gear for strength, accuracy less demanding situations, round billet after heat treatment for slotting or hobbing.
In determining the large and small gear hardness should pay attention to the pinion tooth surface hardness than the large gear tooth surface hardness 30-50HBS. This is because the pinion gear under load more than the number, and the pinion gear tooth root is thin, the gear teeth of the two nearly equal intensity, the pinion gear tooth surfaces of the tooth surface than stiffer.
      2, hardened gear
      Hardened gear tooth surface hard <= 350HBS, commonly used material for the carbon steel or carbon steel with surface hardening treatment, hardness up to 40-55HRC. Use of a low-carbon steel or carbon steel, carburizing required quenching, the hardness of up to 56-62HRC. Require grinding after heat treatment, such as the internal gear grinding is not easy, can be nitriding treatment.

Hoist Parts start from routine inspections

 In addition to daily life use  Rope hoist  the proper use of the process, there is depends on the user how to routine maintenance, routine maintenance and inspection of the parts from the hoist began.
      1  Wire rope hoist  rope inspection first focus. Check the broken wire rope should focus on observation, abrasion, kinks, rust, etc., for some wear and tear, broken wire is more serious but not excessive position, to do a mark in order to focus on tracking the re-examination.
      2 Rope hoist limit checks, pay attention to check the safety rope on the drum stopper is valid, wire rope on the drum plate number plate is pressed and appropriateness.
      3 Check to see whether the main gearbox oil. Rope hoist runtime cabinets abnormal sound. Generally due to bearing damage or gear backlash is too large, severe tooth wear due to other reasons.
      4 pairs of pulleys checks. Focus on the bottom wear is excessive and cast iron pulleys for cracks. For institutions pulley overlooking Yang balance wheel, because it does not operate normal conditions, it is easily overlooked, be sure to check before installing the rotational flexibility.
      5 Check for loose coupling of each hoist or even "scroll keys." Focused on checking flexible pin coupling elastic rubber ring without abnormal wear on tooth gear coupling ring to pay special attention to its wear condition. Poor accuracy due to the installation, the two large offset between the shaft case, the performance of the entire ring will soon wear short bald.
      6 Check the hoist brake performance, condition. Brakes are important parts of the  hoist equipment  ， the agencies directly affect the accuracy and reliability of the movement. Therefore, we should carefully check the electric hoist lifting and luffing two institutions brake condition, observe the opening of the brake shoe friction elements and the wear of the brake pads.

Mini rope hoist advantage of the wireless remote control

There are two mini  Wire rope hoist  lifting methods, single hook lifting, lifting hook. Small size, do wood essence wireless remote control mini Wire rope hoist broke the previous bulky, occupying huge shortcoming, more convenient operation, mainly has the following advantages:
1, wireless remote control mini  rope hoist  freedom of movement Lightweight & compact design
2, when the rope touches the limit arm will stop automatically upgrade
3, the wireless remote control mini rope hoist rope anti-spin, the sensor arm brake motor
4, static and dynamic load sharing activity time setting
5, light and other core socket, household power supply can operate on
6, with safety hook lock hook pad 360 universal connector
7, built-in security facilities winch, freely control upgrade for warehouses, storage areas, housing areas, built as special, workplaces, and light manufacturing

How rope hoist mounted on rails

    Under normal circumstances  Hoist and trolley  mounted on the U-shaped multi-track use. For which this feature, we cable arranged in the middle of the track, that is, the upper beam. 10mm wire rope or cable using vertebral round, top with a basket of flowers bolts; slip ring is two rings linked together, there is a certain margin in order to avoid cable scratch cards. Steering ring is two rings are connected by bolts can rotate freely; put an end cap on the steering ring tightrope, leaving a good motor lead after turning rubber ring fixed on the bottom line. Then one end of a plurality of slip rings to wear to the tightrope, then rubber line segment fixed at the lower end of the slip ring.  rope hoist  frontage motor, can rotate freely after the termination in the power supply. In the traction motor to turn to the center ring, pulling cable in a straight line or circular motion.
      Straight track above method may also be used.

How to avoid committing card chain blocks

In the course of  chainb lock ，  hand chain made cards are the most common problems occur today simply from the following aspects to avoid committing card chainb locks to ensure that the  hoist equipment  life and efficiency:
1, chainb locks friction plate, it should be in frequent use seven days for a check, if found friction plate with oil, should be immediately replaced, if found should immediately replace the friction plate is thin, because of the emergence both of these problems can cause skidding  manual hoist s
2, manual hoists routine inspection, the corresponding mechanical parts for routine maintenance, to see if mechanical parts based on the appearance of rust, if the above please apply lubricant
3, chain hoists chain should always use lubricant maintenance, one is causing the card to prevent the chain rusty chain, and second is to extend the life of the chain.
4, chain hoist brake pads under a ratchet, ratchet pawl next one, such as the pawl spring loose will cause manual hoists without brakes.
5, hand chain guide wheel, to have regular checks to see whether there is squeezing the guide wheel, deformation of the situation, such as the following problems should immediately check the chain, whether the size of deformation, the phenomenon of broken teeth if the problem should be immediately replacement parts
The above mentioned chain hoist maintenance, routine inspection, maintenance, are relatively simple and do not need special tools to assist the operator can independently, manual hoists should be familiar with the product before use instructions for use.

The use of wire rope rope hoist safety technology

The  Wire rope hoist  wire rope safety technology involves the kind of manufacturing methods, constructors, properties, force status, as well as maintenance, inspection, scrap, and many other issues, is a relatively strong professional technology, each security management and technical staff should be on the ropes on the knowledge of the situation by force and have a basic understanding of operating status.

      Hoist rope is one of the members with a high frequency, which is due to its unique characteristics of the decision. Compared with the rigid member rope, wire rope with high strength, light weight, good flexibility, impact resistance and other characteristics, particularly outstanding is its safety and reliability.

       rope hoist  rope used under normal conditions generally does not occur suddenly breaking, even if damage is also a precursor, usually from the individual, local wire break, gradually developed into the whole rope, there is a period of time to process, if rope suddenly snapped, Because the load exceeds its limit breaking force occurs suddenly destroyed the entire rope. This provides such a possibility, as long as usual to strengthen the electric wire rope hoist safety management and use of wire rope caused by the accident can be avoided. But the rope  rope hoist force status changing, complex work environment, and its destruction in addition to mechanical damage, the structure of improper selection, improper maintenance checks, wire rope failure is not timely updates and other reasons for retirement.

The following conditions need to stop the process of lifting hoist

rope hoists are widely used: construction and installation company, factories, mines and civil construction and bridge construction, electric power, shipbuilding, automobile manufacturing, construction, roads, bridges, metallurgical, mining, slope tunnels, wells and other infrastructure construction management protection of  Hoist equipment  . In the case of the lifting process the following circumstances need to stop the  rope hoist lifting tasks:
1  rope hoist  to be hanging on someone or floating object compartment;
      2 overloaded or weight of the object is unknown, such as weight lifting or pulling unclear uprooted direct buried objects and oblique oblique, such as hanging;
3 bundle hanging heavy imbalance there may be strong or slide heavy objects between the edges and corners are not padded with rope, etc.;
4   Wire rope hoist  used workplace dark, unable to see the venue, the case was hanging objects and command signals.
5 hoist structure or components affecting safety defect or injury, such as brake safety device failure, hook nut locking device is damaged, rope and other damage to be scrapped;

Explosion-proof rope hoist hoist using the irreplaceable

      Commonly used in the field of   Wire rope hoist  crane components are: motor, transmission, drum and sprocket. The most important part of the motor, the purchase and use of  rope hoist, hoist itself, in addition to checking whether there is a problem, the outer environment is our most should pay attention to the following Detailed hoist I have for you in what kind of environment under which they could be used.

       First;  rope hoist  operating conditions, ambient temperature to meet: -20 ℃ ~ +40 ℃. Secondly; weight class: JC40% working system when intermediate  rope hoist lifting capacity reduced by 30% when the system is heavy duty  rope hoist JC40%. Heavy duty system JC40% of  rope hoist is used in relatively heavy work load often requires a higher safety factor rating or the case.

         rope hoist does not apply to corrosive gases or relative humidity greater than 85% of the sites, not lifting the molten metal or toxic, flammable and explosive materials. If your work environment is more corrosive gases should be selected plant full proof  rope hoist,  rope hoist irreplaceable proof  rope hoist for use, explosion-proof  rope hoist its form "flameproof" gourd exposed parts are made of special explosion-proof non-sparking material in a suitable environment to ensure the safe use of explosion-proof hoists are security tools in one.

Group hanging rope hoist before using the test method

Group hanging   Rope hoist t generally used in large tanks, welding, building construction work climbing frame, is a low-speed electric chain hoist itself some characteristics improve the safety of use before using for the use of the environment and its group hanging  rope hoist Installation should be tested before use, following test method:
(1) isolated power supply, check all  hoist equipment  and electrical connections and connections are locked and is solid.
(2) Turn on the power using a lightweight load operating range of all group hanging  rope hoist and check operation is always smooth.
(3) Press the button switch does the "down" button, the operation of  rope hoist crane group decreased until the limit switches, at which point the motor will stop automatically.
(4) does the press switch is "on" button until the chain is completely retracted into the chain bag, and the motor stops.
(5) Check the group hanging hoist  load chain  lubrication (lifting chain lubricated at the factory had been oiled, but in the transport process may kill) any ready-made lubricant can be used to lubricate the lifting chain, We also recommend that you maintain a small amount of oil the chain bag, so that the chain can be immersed in the lubricating oil.
(6) When the host of the number of pairs of chain hanging chain or chain, is strictly prohibited under the hook from the chain will flip to avoid hazard.
(7) Check the destination group hanging  rope hoist chain direction, all welding points should be in the same direction, only the chain welded at all points on the same line when being determined to be fully operational.

Electric chain hoist chain techniques detailed

To ensure their safety and durability.load chain tough surfaces can prevent product damage and softening of the core material, so that the lifting chain, long-term performance.
      Wire rope hoist  chain of low-carbon steel, the chain is more resilient, and more rugged wear at work to ensure the safety.
rope hoist can be customized according to customer requirements lengthened, allowing you to use more convenient worry. Imported  rope hoist chain are generally equipped with chain bag chain hoist looks so clean and neat appearance, load chain bag is also equipped with anti-rust oil so that the chain is not easy to rust, thus extending the service life of electric chain hoist
     load chain quality grade
L (3) grade  load chain  within the specified minimum breaking force of the average stress 315Mpa
M (4) grade load chain within the specified minimum breaking force of the average stress 400Mpa
S (6) grade load chain within the specified minimum breaking force of the average stress 630Mpa
P (5) grade load chain within the specified minimum breaking force of the average stress 500Mpa
T (8) grade load chain in the specified minimum breaking force of the average stress 800Mpa

How to ensure safe operation of rope hoist lifting

   Rope hoist  lifting weights and running cars from improper methods,  rope hoist then make hanging objects swing accidents.  rope hoist lifting hanging objects, when the wire rope or  load chain  tension should be parking,  rope hoist according to the direction of the hook again to identify the hook shake while lifting workers should check whether hanging objects hanging in prison;  rope hoist lifting is not too Meng, hanging objects from the obstacle when accelerating until after the lifting speed; easy lifting of hanging objects big high, generally over a secure channel up to 0.5m for the good things.
           Wire rope hoist   hanging objects running in conditions permitting, the best hanging around 0.5m from the ground by rigger behind the hoist hanging objects help steady object and under the command of the rigger run around obstacles. Do not run  rope hoist intermittent, long-distance running, it is best to send electricity long run as well. Runtime hanging objects should ensure smooth lifting,  hoist and trolley   if hanging objects swing or jitter, should be running side edges steady running hook, not let it shake or swing.

Rope transportation, maintenance settlement volume

1, the  rope  transport: loading rope sling plate can penetrate the rope reel shaft hole or shaft hole with a pipe after the social order, and then tie clip set in the pipe ends, prohibited direct rolling down from a height, must use the transition springboard slowly sliding or lifting with a crane, the ground handling time, and if used to pry carry, do not pry on the rope directly to the surface, so as to avoid crushing haul rope surface coverage required tarpaulins to prevent rainwater infiltration caused by corrosion of use.
2,  Wire rope  maintenance: new ropes acceptance of storage, it should be placed in a dry room, avoid direct sunlight and heat baking; such must be placed outdoors, should be placed on higher ground on the ground, covered with tarpaulins. Placed on the ground generally elevate 300mm or more.
3, rope unwinding: If you need to use when re-wrapped handle comeback to avoid rope ring (kink) phenomenon; solution volumes If you encounter kinks, they should immediately stop, try to eliminate before proceeding. Kink phenomenon, according to the different levels will kink rope breaking force decreased by about 40-60%.  rope  should be slowly rotating disc or scroll slowly unwinding the rope to prevent twisting or loose twist phenomenon. Solution volume; strictly prohibited to use the wrong method in Figure 3 deconvolution to avoid twisting (pull its weight) or loose twist (broken Jin) phenomenon, causing kinks.

Distinctive low headroom hoist

       Low headroom  rope hoist for machining, assembly, warehousing and other material handling options, especially for plant height restricted spaces.

       Low headroom is a  Wire rope hoist ，  by the motor, transmission and drum or sprocket. Usually comes with squirrel cage conical rotor brake motor drive, weight is generally from 0.1 to 80 tons, lifting height of 3 to 30 meters. Most low headroom  rope hoist used by people to follow the control button on the ground can also be manipulated or used in the driver room wired (wireless) remote control. Electric wire rope hoist can be used alone, but also with the manual, chain, or electric car assembled together, hanging in the roof of the building or a  hoist equipment  beam.
       Low headroom  rope hoist is a small light lifting equipment, with a compact, light weight, small size, parts versatility, easy operation. Hardened gear reducer design, long life and high mechanical efficiency. Motor using a conical rotor brake motors, having upper and lower two-way safety limit device. Its own characteristics that make it widely used in small confined spaces.

       Low headroom  rope hoist can be widely used for lifting heavy objects or installed on single girder crane, lines, curves word beam, can also be used to hoist double girder, hoist gantry crane or jib cranes, industrial and mining enterprises, railways, docks,  hoist equipment   commonly used in the warehouse. Best headroom than ordinary CD hoist lifting height can increase 200 ~ 500mm. Excellent three drive technology, lifting gear made of high quality alloy steel, three slow, smooth running, long life, reliable performance, avoiding the intermediate shaft hoist CD drive long distances many shortcomings. Motor for the new self-designed cold cone motors, motor housing is a good heat dissipation aluminum alloy casting, motor insulation class F, protection class IP54, motors were higher than normal level.

Lifting tackle characteristics and classification

First, the characteristics of lifting tackle
      Aka pulley lifting tackle is a  hoist equipment   is an important tool for lifting the lifting industry, its shape is simple, it is extremely easy to use, able to  Hoist and trolley  number changes the direction of pulling and lifting or moving operation, in particular by the coalition pulley pulley block with winches, masts or other lifting machinery.
Second, the classification of lifting tackle
1, lifting tackle by tackle and hanging objects can be divided into hook type pulley, chain pulley, rings and hanger-type block-type block of four. Tackles are mostly small and medium hook type, chain ring and rings style, while large pulley hanging by rings and beam.
      2, according to the number of rounds into a single door pulley, pulley and multi-door two-door pulley.
      3, according to the contact wheel and axle shaft can be divided into plain bearings and rolling bearings mounted between two kinds.
      4, according to points splint can be opened, and closed with an opening pulley tackle. Pulley openings splint can be opened for easy loading ropes are generally single door pulley, it is often used at the foot derrick used for guide blocks.
      5, tackle different ways by using divided into fixed and movable pulley tackle.
      6, weight lifting tackle small and compact. There are both manual and electric.
① manually tackle. By the Human pulling traction chains through worm gear drive chain roller, so that heavy lifting. Using homemade brake load, the heavier the load the greater the braking torque, safe and reliable. Operating range of hooks under a vertical line.
② electric pulley. Gear mechanism driven by the motor, wire rope drum and hook pulleys, make heavy lifting. Rope drum within the shell, and the motor and gear mechanism with brake associated. Intermediate housing upper part of the lug. After hanging vertically fixed lifting heavy loads. Pulley can also be hung on the run small car, a run-in trolley, traveling along the overhead track, in the workshop inside or transportation of materials between the workshop and the workshop.

Home wireless remote control lift hoist

       Wireless remote control mini  lift hoist  with extraordinary communication design is generally divided into household and industrial micro-miniature  lift hoist , synchronous transmission codec, with software to eliminate interference, debugging, correction, manual replacement Digital hundreds of sets of frequencies, by the computer / duplicator directly change all function settings.

       Wireless remote control  lift hoist  in the production design are up to international standards to ensure the safety of use, the motor heat sink made of cast iron structure, improve the service life. Wireless remote control mini  lift hoist  lifting speed can reach 10 m / min, initial design rope length is 12 meters (longer can be customized), the hook, the hook specially designed with advanced settings, which greatly increased the mini  lift hoist  lifting weights, using civilian 220V power supply, especially for daily use, industrial production lines, freight logistics and other occasions.

        lift hoist  wireless remote control super-safe design, more than 4.3 billion kinds never repeated security code, fault self-diagnosis and auto-lock frequency tracking, etc., are leading the world's original. Even if the key is not inserted, the emergency stop button is still valid. Switch / rocker / fault relays and other components automatically stops and you can not boot up.

       Wireless remote control  lift hoist  lifting equipment as a new  Hoist equipment  s 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. Since mini  lift hoist  appearance, easy installation, low noise, safe and reliable, it is also widely used in factories, workshops, warehouses, hotels, shopping malls and even home decoration and other places.

Explosion-proof electric hoist equipment and twice a job analysis equipment

Explosion-proof Wire rope hoist equipment and twice a job analysis equipment
1,  Wire rope hoist  is a device for power transmission and distribution circuits, whose main task is to conduct electricity transmission and distribution. Connected device is called a device or  lift hoist ，  transformers, circuit breakers, fuses, earthing knife switch, lose change with cable and so on.
2, Wire rope hoist secondary equipment: refers to a device for controlling, indicating, measuring, monitoring and protection circuits, whose main task is the operational status of the primary circuit, operating parameters to be monitored.
3,  rope hoist  switch cabinet: refers to the line by a certain program will be the primary equipment, secondary equipment assembled from power distribution equipment, is used for lines, equipment exercise control, protection, sub-fixed and withdrawable , while the inlet and outlet voltage level and can be divided into high voltage switchgear and low voltage switchgear.
4, the internal components include: bus, circuit breakers, conventional relays, integrated protection devices, measuring instruments, etc.

Analysis of Wire rope hoist type definition

The so-called special Wire rope hoist is to accomplish a specific task and the development of dedicated Wire rope hoist . Its institutions, it refers to an institution within a year and the total number of running hours of the ratio. Changes in load level, according to the nominal amount of Wire rope hoist Wire rope hoist designed in the actual operation, the  lift hoist  loads are often less than the rated hoist capacity. According to hoist how busy work load and the degree of change, usually Wire rope hoist type of work is divided into: light, intermediate, heavy and extra heavy duty grade four levels. If the light level of the type of work that is used in heavy duty Wire rope hoist type of work places, Wire rope hoist will often fail, affecting safety in production. Therefore, security checks, pay attention to the type of work Wire rope hoist and working conditions must be consistent. By the Wire rope hoist structure carrying capacity, boom hoist capacity and overall stability against overturning three curves envelope.   rope hoist  type and amount of work are two different concepts,Wire rope hoist capacity, necessarily heavy grade, Wire rope hoist a small amount of light is not necessarily level. Wire rope hoist type of work and safety performance has a very close relationship. The amount of Wire rope hoist, span, lifting hoist the same height, if different types of work in design and manufacture, the safety factor is not taken by the same, that is, components, dimensions, specifications are different.

Tower Hoist equipment installation and removal

Tower  Hoist equipment  installation and removal
A preparation before disassembly
Assembly and disassembly of electric hoist tower is the central part of the construction, a great danger, must be fully prepared before construction: ① technician should be based on the construction of the installation manual and the specific characteristics of well construction programs or construction design, and has a safety technical disclosure of the content. Construction program must be communicated to all the pre-job construction personnel, avoid going through the motions; ② construction program response key and difficult parts of the assembly and disassembly method of calculation and discussed in detail, with clear construction methods, choosing the right  Wire rope winch ，  slings , hanging points, tying methods.
2 assembly and disassembly operations
Banner Engineering process must be done unify thinking, unified command, the safe use of procedures by the construction. Should be noted: ① construction  wire rope winch  pull the legs should be playing on firm ground, mat or square wooden planks necessary; ② oblique hanging, side crane, lifting crane select the appropriate location of the lifting points and auxiliary traction and other measures; ③ 2m above aerial must have security protection, rain and wind than five stops operation in case of rain midway construction tower hoist must be installed in a safe condition; ④ boom lifting operation depends not turn, and let someone protection; ⑤ disassembly must strictly follow the order of the construction program requirements, installation frontier boom should not add weight, unassembled not lifting heavy weight. Demolition should be removed after the demolition of the counterweight boom; ⑥ Check the tower hoist the connecting parts are complete, reliable and effective, and its lifting, rigging and so on whether security.
3 hanging point selection
Assembly and disassembly of tower  Wire rope hoist  point selection and mounting methods are an important part of the construction to ensure safety, should pay attention to several issues. ① parts lifting point should be using a fixed location or special lifting point, when necessary, by their own design configuration. Side hanging, hanging oblique inclination should be to ensure reasonable. There are inner and outer structures lifting point should be selected when the structure of the inner sleeve to avoid internal and external isolation, such as TQ60/80  Wire rope hoist  tower spire. ② boom and the balance arm after lifting components such as to keep the horizontal and direction, the longer the mounting boom longitudinal direction as far as possible non-horizontal lifting method, the arrangement of the hinge end of the arm above the head end of the arm, hinged then the boom mounted to the horizontal position, as FO/23B 50m boom hoist tower and so on. ③ tower  Wire rope hoist  boom is hinged two parts into one assembly and disassembly when lifting point should be selected as the arm level, temporary connections rope force is smaller locations. ④ Remove the installation of reverse operation, more dangerous, should be strictly in accordance with the instructions on the construction plan their sequence assembly and disassembly operations, must reverse the order. ⑤ try not to use hooks Jia Shengsuo lifting heavy objects.

When using wire rope electric hoist attention problems

When using  rope hoist  attention problems
When using  Wire rope hoist  rope should pay attention to the following questions:
First, the use of inspection of the wire rope hoist products to ensure that its mechanical properties and specifications meet the design requirements;
Second, to ensure adequate safety factor, if necessary, use force to do before the calculation shall be used scrap wire rope;
Third, the use of two ropes to avoid cross laminated by force, to prevent knotting, twisting, bending and draw excessive wear;
Fourth, we should pay attention to reduce  wire rope hoist  rope bending frequency to avoid reverse bending;
Fifth, not drag unclean place to prevent external factors on the rope for damage, corrosion, making rope performance degradation;
Sixth, maintaining wire rope hoist rope surfaces clean and good lubrication condition, to strengthen the rope maintenance and repair.

Electric hoist hook standard quality requirements

1 hook surfaces should be smooth, without cracks, sharp, burr, delamination and other defects;
(2) shall not have cracks inside hook, white point and affect its safe use of inclusions and other defects;
3  Hoist equipment  lifting accessories hook flaws allow welding;
4 Wear dangerous section shall reach 10% of the original size;
5 openings should be consistent with the provisions of GB10051 in 5.2;
6  lift hoist  accessories hook hook body torsion torsion angle that does not exceed 10 degrees;
7. Dangerous section of the hook shank or may not have plastic deformation; hook thread not corrode.

Rope hoist lifting accessories - gear reducer

I.  Rope hoist  lifting accessories gear reducer introduction
Rope hoist gear reducer is produced according to national professional standards ZBJ19004 outer involute helical gear reducer, gear reducer is widely used in metallurgy, mining, lifting, transportation, cement, construction, chemical, textile, printing and dyeing, pharmaceutical and other fields. Gear reducer scope is as follows:
1, high speed shaft speed is less than 1500 rev / min.
2, the gear transmission peripheral speed of not more than 20 m / sec.
3, the working environment temperature -40-45 ℃, if less than 0 ℃, before the start of oil should be preheated to above 0 ℃, the gear unit can be used for both positive and negative direction.
Two.  wire rope hoist  lifting gear reducer attachment features
1 gear made of high strength carbon steel hardened by carburizing made tooth surface hardness of HRC58-62, gears are used CNC grinding process, high precision, good contact.
2 Transmission rate: more than 96.5% single-stage, two-stage greater than 93%, three more than 90%.
3 smooth operation, low noise.
4 small size, light weight, long life, high carrying capacity.
5 Easy dismantling, easy to install.

Equipment assembly process chain hoists

1  manual hoist  preparatory work prior to assembly
(A) research and technical conditions are familiar with assembly drawings to understand the chain hoist role of product structure and components, as well as connected to the relationship.
(2) determine the assembly methods, procedures and tools needed.
(3) collect and cleaning parts.

2  chain block  assembly
Another component assembly assembly, parts assembly and final assembly of the points, the entire assembly process should be carried out in sequence.
(1) The module assembly of certain parts are mounted on a base part on which the constituent components. If a speed reducer shaft, on the shafts, gears, keys and other parts assembled components.
(2) chain hoists parts assembly will be a number of parts, components, parts installed on another basis on which constituent parts (an independent body). Such as lathe headstock, feed box, tailstock.
(3) general assembly will be a number of parts, components, parts combined into the whole machine called a general assembly during operation. Such as lathes is to combine several cabinet and other components, assemblies, parts combination.

3  Chain Block  assembly work requirements
(1) assembly, parts and assemblies should be checked on the shape and dimensional accuracy is qualified to check for deformation, damage, etc., and should pay attention to the markings on parts, to prevent the wrong equipment.
(2) fixedly connected parts, does not allow a gap. Moving parts, in a normal gap, the flexibility required direction uniformly, there should beat.
(3) of the moving part (or parts) of the contact surface, must ensure adequate lubrication, if the oil must flow.
(4) a variety of pipes and sealing parts, after assembly shall not have leakage.
(5) test, should check a component connection reliability and flexibility of movement, the joystick is flexible and handle position is in the right position; prior to commissioning, from low speed to high speed gradually.

Solve hoist brake failure

      After a period of time using the  Rope hoist  brake failure phenomenon, even in the no-load hook will own decline. Will be adjusted to limit position conical brake ring any avail. In sand casting workshop, working time is almost non-stop to use the road, so a failure will affect production, in addition to this failure occurred in workers to operate the venue was very safe.

Resolve the cause electric hoist brake failure
       In maintenance, found a  wire rope hoist  shaft screw loosening caused by the analysis, we believe that the reason for the failure of the motor is energized, the conical rotor under the action of the electromagnetic force, in addition to a rotating movement, the same time produce a right- axial force, the axis moves to the right. Electric hoist motor brake spindle taper ring one right there with the motor cover 3 Disengagement and the motor spindle spring 2 is compressed, the motor normal rotation, through the coupling and gear mechanism driven drum rotation, so that heavy lifting. When the power is turned off, the electromagnetic force disappears, the rotor shaft to the left by the force of the compression spring member 1 and the member 3 has a certain pressure again snapping, rapid braking of the rotor, such a cycle, vibration big difference. Although the spring lock washer, but due to the frequent under severe shock, vibration, and small screws, resulting in a period of time, the member 3 is constantly left loose until the contact with the member 5, which impede the member 5 to the left in shutdown normal axial movement, resulting in the right side of the brake ring member 5 and the motor between the rear end cover snapping force decreases and failure, severe-load hook will own decline.

       Solution: To solve the problem of the M6   loosening, tightening bolts alone is not enough, so we use ZY-802 locking anaerobic adhesive cements way, the right end of the conical rotor  lift hoist  apart, remove the screw, washed with acetone screws, screw, screws, screw holes were painted ZY-802 anaerobic adhesive and screw into the, wipe the excess glue, paste, can be dry after use.

Lifting work characteristics

lift hoist work characteristics are as follows
A) general structure of  lift hoist  large complex organizations, to complete the lifting movement, horizontal movement. For example, to complete the lifting crane, dolly carts run and run three sports; portal cranes can complete hoisting, luffing, slewing and carts run four movements. In the working process, often several different directions of motion simultaneously, greater technical difficulty.
2) lifting the lifting of heavy objects varied load varies. Some heavy objects weighing several hundred tons or even thousands of tons, and some objects up to tens of meters, irregular shape, with scattered granules, hot melt state, inflammable and explosive dangerous goods, etc., lifting process is complex and danger.
3) Most of lifting machinery, you need to operate within a larger space, and some want to install rails and wheels (eg cranes, bridge cranes, etc.); some should be fitted with tires or caterpillar walking on the ground (such as cars cranes, crawler cranes, etc.); others need to walk on a wire (such as passenger, cargo ropeway), larger space, once the effects of the accident caused by a range of well.
4) Some  Hoist equipment  carriage of persons in need rails, platforms or rope to do lifting movement (such as elevators, lifting platforms, etc.), which directly affects the reliability safety.
5) Lifting exposed, moving parts are more often associated with lifting operations and personnel in direct contact (eg hook, wire rope, etc.), a potential risk factor for many sporadic.
6) operating environment is complex. From large-scale iron and steel enterprises to modernize ports, construction sites, railway hubs, tourist attractions, there are lifting machinery in operation; workplaces often case temperature, high pressure, flammable, transmission lines, magnetic and other risk factors , for equipment and operating personnel a threat.
7) Lifting operations often require more than one match, jointly conducted. An operation requiring command, strapping, driving and other operations personnel with skilled, motor coordination, mutual care. Workers should have the ability to deal with on-site emergencies. More close cooperation between workers, usually there is a big difficulty.
hoist equipmentof the work characteristics, determine its relationship with great safety. If lifting the design, manufacture, installation and maintenance of such links is the slightest negligence may cause injury or equipment accidents. On the one hand causing casualties, the other, will cause great economic losses.

Electric hoist three kinds of loads and effect

Wire rope hoist load refers to the process in operation, load bearing species complex loads in a different direction, not only in the running to be included electric hoist static load, dynamic load, alternating load, etc. The role of various loads, And with electric hoist operation conditions change, even if the load is also exhibited similar characteristics varied. Subject to the lifting of the load bearing parts and the structure will produce the corresponding stress and deformation, when the stress and deformation exceeds a certain limit, it will make zero, component loss of function, or even destroy, dangerous.

Electric hoist  lift hoist  load calculation and its components is zero, unit, component stress analysis of the original basis on which the retirement or cause of the accident analysis to determine the important basis. Load state judgment was accurate or not, will directly affect the results and conclusions of the accident is correct or not. Therefore, we need to understand the load on the crane species, the role of various loads as well as in the direction of the mode of action of different load conditions.
A gravity load hoist loads and gravity loads, including weight lifting load two parts. Weight loads include crane metal structure, mechanical equipment, electrical equipment, etc. gravity loads. Mode of action of the load and simplify the mechanical model can be considered separately, under normal circumstances, crane machinery and electrical equipment can be considered as concentrated loads on the equipment installation location center truss weight acting on the structure as a concentrated load on the node , box-type structure as a uniform load weight handling. Weight load is typically less than the weight of the object it works much more. Lifting load hoisting means all gravitational mass, including allowing the maximum effective lifting goods, extract device, suspension flexible member and other lifting devices in gravity. When lifting height of less than 50 meters, weight lifting rope can be neglected. When the hoist is in a stationary state of non-movement, namely electric hoist is not working, or hanging out stops movement at the state of suspension in the air, or electric hoist uniform motion in a steady state, the electric hoist lifting the weight of the load and the load can be As static load handling. For bridge type hoist, trolley material through horizontal movement along the main beam, the car weight and lifting load is composed of a mobile load.

Two. Impetus to make  wire rope hoist  load dynamic loads generated upon a change in the state of motion Dynamic Effects, dynamic load effects so that the original value of the static load increases. Dynamic loads including variable motion, the structure and weight lifting load inertia loads generated; After the wheel is not flat track adapter, or moving parts of the crane buffers the impact shock loads; inertial loads and impact loads, metal structure and working mechanism of elastic system vibrates the vibration loads, etc.. Dynamic load and the speed of the work, with the direction of movement, but not with the form and nature of the structure, and the conditions of use of the crane and drivers methods of operation, operation skills proficiency and other factors.
Three Natural load load specifically refers to the natural wind, ice, snow, earthquakes and temperature changes caused by natural factors such as load. Work outdoors  rope hoist ，  wind loads on the impact of lifting operations should be given adequate attention.

80 lifting chain

80  load chain  is essential when lifting heavy lifting device consisting of advanced production line equipment, the use of high-quality alloy steel (manganese, etc.) materials, strict quality control throughout, lifting chain to reach the 80 full- class international standards.
load chain selection are the following items:
1 inner / outer links are deformed, cracks, corrosion embroidered
2 pin is deformed or turn, embroidered eclipse
3 roller whether cracks, damage. Excessive wear
4 lifting chain connector is loose deformation
5 there is no abnormal noise when running or abnormal vibration, chain lubrication in good condition.
Lifting chain standards
Lifting chain applications: high-precision calibration chain, lifting chain.
Lifting chain material: high quality alloy steel.
Lifting chain Finish: polished, black, dipping, hanging plastic, plating.
Lifting chain manufacturing standards: ISO3077, EN818, AS2321.
Lifting chain intensity levels: 80, 70.
Lifting chain security guarantees: 4-fold safety factor, 205 times the test load.

Monorail Introduction

Monorail: break up the implementation of trucks and hand lane two kinds, hand lane to drive bracelet, hand-launched vehicles in order to push heavy lifting driver can freely walking beam rail bottom flange on, and the wheel flange spacing beam track width requirements can be adjusted, the manual hoist hanging in the road below, can be composed of  hoist and trolley .
 Monorail uses: TROLLEYS to drive bracelet, walking on the beam orbit at the lower edge, with  load chain  hoists may form a bridge, a single beam or cantilever cranes.
Monorail widely used in factories, mines, docks, warehouses, construction sites, etc., monorail for installation of machinery and equipment, lifting goods occasions, monorail, especially for non-power stations operating. Monorail  Hoist and trolley  safe and easy maintenance. Monorail compact structure, small size. Monorail trolley wheel spacing to facilitate, for a variety of beam. Monorail car left and right wall hinge connection, under the action of gravity, can adjust the height of the four wheels by force. Monorail high transmission efficiency, small hand pull. And in a smaller radius of gyration on the road.
Monorail Use: Do not overload monorail use. Monorail car lifting weights, forbids any person to walk or work under heavy loads. Monorail when lifting heavy focus on the beam within the plane of the web, do not lift. Monorail  trolley  operation should force the bracelet hand chain wheel center plane, shall not be stayed. In cases where the hand-pull monorail exception, must not jerk, you should immediately stop using, check the reason. Monorail track surface regularly gears and filling oil, and check the fasteners loose.

Monorail beam TROLLEYS is working to support, so deformation, distortion, cracking, or do not meet the criteria and have other defects can not be a single-track lane of I-beam.

Seven lever hoist maintenance tips

Seven lever hoist maintenance tips, extending its life
1, finished with chain hoists cleaned, coated with anti-rust oil, stored in a dry place.
2,  lever hoist  brake friction surfaces must be kept clean, pay attention to check, to prevent unnecessary losses caused by brake failure.
3 year deal at least four times a gourd maintenance treatment, such as diesel cleaning parts, and calcium-based grease lubrication.
4, each job is completed, we must first wipe the loose end of the wire rope  on the adhesion of mud, dust or grease, loosen the jaw, out of wire rope, wire rope sequence will gather around the shelves, and wipe the length of wire rope, wire rope stored in dry place to prevent corrosion.
5, when the internal movement poured into the mud, cement or other dirt, rinse with water, then clean diesel; cleaning, dry calcium-based grease on the grease; finally release the jaws, wipe with a clean cotton upper jaw grease moisture.
6, when the jaws wear, carrying capacity is less than 80% of rated load, replace the jaw; when the rope diameter reduced by 10%, the rope should be replaced.
7  lever hoist  inspection overhaul after cleaning, and heavy-load test should be carried out to confirm working, automatic and reliable in order to rendezvous with. Brake friction surfaces must be kept clean, non-contaminated sewage sludge.

Small crane for rotary essentials

Small crane for rotary essentials

During  Hoist and trolley  lewing operation should be to observe someone or obstacles are not in the frame  lift hoist  turntable tail swing radius, overhead wires or other obstructions observe whether the movement of the crane jib space.

       Non-pilot operated  hoist equipment  cab before the driver is usually the leftmost one handle (lever) is a rotary operating handle (lever). Push the handle before turning to the right (left or center position control room), turn left after the pull, hold the handle does not move or handle (lever) set in place to stop rotating, the brake pedal or move the hands-on brake handle, can be fixed on the car does not move. Pilot-control crane control room operator left front (left) is a rotary handle operating handle. Handle left, left turn, right handle, right turn, the handle is in the intermediate position, turn off power.

     Hanging back turn, the configuration allows only four outrigger crane the crane side and rear area operations, prohibited area in front of the job. With a fifth leg of products, in the fifth leg in working condition, you can re-front operations. All terrain crane and mobile crane may be operating within the range of 360 °.

     Honk swing operation should be the first to draw attention to, and then release the lock braking or turning mechanism, pulling the operating handle smooth, rotation speed should be slow, not rude to use the accelerator pedal to accelerate. Let heavy rotation in the swing state, lifting heavy objects is not completely off the ground does not allow for turning operations. When the rotary power cut, the upper structure has stopped, depress the brake pedal rotation to fix the upper structure. Depress the brake pedal at the same time with the rotary lock locking mechanism, the pedal is released, the upper structure remain intact.

Crane safety rules

Crane safety rules: 1. Hoist equipment  drivers need to understand the structure, performance and familiar method of operation. Need to concentrate at work, drunk prohibited actions. 2 cranes in the lifting process, if you encounter  lift hoist  defective brakes, the actual need of immediate push to drop the controller handle full file location, and then start the car, find a safe location to place heavy objects. 3 cranes if they work, then start the hoist equipment  or leave their jobs, etc., are required to notify the other party. 4, in transporting the crane, a sudden power failure or voltage drop, and so encounter trouble when they can not put down heavy case, the driver should immediately-ringing to inform the following persons to open. Drivers need to regain control handle to zero, and then find someone to deal with checks. 5, in the closed, the main power before, all controls should handle Lan at zero. 6,  hoist equipment  rental process, manipulate crane, you need to start the controller handle should be gradual, not the controller from the forward position directly to the reverse position.

Metallurgical crane hoist operating conditions

Metallurgical crane hoist operating conditions
1,  Wire rope hoist level of work M, M 6; Operating ambient temperature not higher than 60 ℃.
            2, lifting mechanism, equipped with a safety brake and brake,  Rope hoist  during normal working hours, a conical brake motor brake, brake motor matching conical brake, when the conical motor brake failure or intermediate transmission link failure, mounted on heavy-duty high-speed shaft reducer DC electromagnetic brake to avoid the risk of re-stall. (Crane picture) while, in line with conical brake motors and DC electromagnetic brake role in the delay device installed in the control circuit to avoid electrical congestion occurs.
     3, with the upper limit dual function. The first limitation of the weight limit, two limiting conventional  rope hoist , clipping off the fire restrictions.
     4, the weight limit protection, electric hoist lifting 90% of the rated capacity limiter disarm the alarm, 105% rated load hoist power to stop working.
     5, high temperature insulation protection, the drum hoist enclosure design and installation of insulation panels below, separated molten metal thermal radiation.
     6, lift motor and motor insulation class class, the lift motor windings overheat protection device.
     7, high strength rope structure specialized metallurgical temperature  wire rope.
     8, the control priority to use remote control can also be used for centralized control, centralized control, ordering, please note.

How should the crane reducer lubrication

How should the crane reducer lubrication

In the  Hoist and trolley  gear, the gear tooth surface lubrication of the gear unit are almost always used in the lubricating oil in the way of the housing to achieve, the  hoist trolley  usually have a relatively small peripheral speed.

     In order to reduce drag reducer rotating gantry crane, thus limiting heating purposes, the depth of the proposed gear lubricant no more than three modules, when the modulus is greater than 20 cm and a high viscosity lubricating oil, gear oil must be equal to the depth of the tooth height adequate. Only in the wheel without ribs were allowed to fall into a low-speed gear greater depth. Two and three horizontal gear, gantry  hoist equipment  oil level adjustment, even if the high-speed gear teeth can be soaked in oil. In the vertical gear, immersed in the solution when the oil lubrication, the upper and the intermediate gear is to rely on oil splash lubrication.
   Template support is usable lubrication pinion gear rotatably driven to rotate the gear shaft is provided, one of them. When the gears reducer lubricant type, must take into account the circumferential speed, average temperature and permissible pressure ratio. Allow arm pressure line and the tooth surface hardness. Thus, the rotating gantry crane gear oil, can be considered the peripheral speed of the device, the average temperature and the hardness of the tooth surface. First grade and third grade gear, lubricating viscosity required for transmission of the average value of the viscosity of the lubricating oil. In the crane reducer, when the ambient temperature is 20 ℃, oil temperature should not exceed 55 ℃.

In the crane gear, the gear tooth surface lubrication of the gear unit are almost always used in the lubricating oil in the way of the housing to achieve, the crane wheels usually have a relatively small peripheral speed.

     In order to reduce drag reducer rotating gantry crane, thus limiting heating purposes, the depth of the proposed gear lubricant no more than three modules, when the modulus is greater than 20 cm and a high viscosity lubricating oil, gear oil must be equal to the depth of the tooth height adequate. Only in the wheel without ribs were allowed to fall into a low-speed gear greater depth. Two and three horizontal gear, gantry cranes oil level adjustment, even if the high-speed gear teeth can be soaked in oil. In the vertical gear, immersed in the solution when the oil lubrication, the upper and the intermediate gear is to rely on oil splash lubrication.
   Template support is usable lubrication pinion gear rotatably driven to rotate the gear shaft is provided, one of them. When the gears reducer lubricant type, must take into account the circumferential speed, average temperature and permissible pressure ratio. Allow arm pressure line and the tooth surface hardness. Thus, the rotating gantry crane gear oil, can be considered the peripheral speed of the device, the average temperature and the hardness of the tooth surface. First grade and third grade gear, lubricating viscosity required for transmission of the average value of the viscosity of the lubricating oil. In the crane reducer, when the ambient temperature is 20 ℃, oil temperature should not exceed 55 ℃.

Crane Maintenance Points

Crane Maintenance Points
Comprehensive maintenance department for bridge cranes,   Hoist and trolley   maintenance is a very important part, which includes seven aspects: 1. brake inspection, periodic adjustments brake wheel braking and brake wheel, to ensure flexible and reliable clearance ensure that 0.5 to. 1 mm.It should be noted that, to ensure that no contaminants present in the friction surface, if found to exist must use thinner or gasoline to clean. 2. pairs of bridge  Hoist equipment  lubrication, should pay attention to speed reducer, gearbox and gears and other parts of lubrication and hydraulic oil should be noted that by asking. 3 According to the relevant provisions of the crane wire rope inspection, if more than specified will be updated immediately. 4 Check the track clean and gear will not have dirt, gravel and other objects.
   5 to pay attention when the lift hoist  body compression bridge connecting bolts, check the tightness. Always check the parts connected to each other strong, timely and tighten if loose crane. Six constant attention to noise when the machine is running, if the operation is not normal timely manner. 7 Note rotation mechanism functioning, check guarantees that the center gear mechanism crane line parallel to the centerline. And the intermediate space on the right.



Crane attention orbital welding points
Overhead  hoist equipment  operation quality basic protection in the installation guide. Therefore, we must attach importance crane rail mounting, stringent.

     Common rail mounting beam bridge crane has two kinds: one is in steel beams, precast concrete beams is. In addition, the crane rail must be removed before welding groove and nearby soil, has been cleared, revealing a metallic luster. In welding, the order should be bottom-up, layer by layer surfacing, the last picture in the spots around the crane. During the welding process issues that need attention every layer, welding electrode welding solder wave should end rather than several together to avoid arc fault. In addition, the welded joints of each track. At the end after the welding to prevent moisture.

Folding arm overhead cranes Introduction

Folding arm overhead cranes Introduction

Knuckle boom  lift hoist  is lifting height plus one, is a for loop, intermittent motion machinery. A work cycle include: extract extract means to put items from the lift, and then move to the designated place lower level items, followed by a reverse movement, so extract unit returns to original position for the next cycle
Usually by a crane hoisting mechanism (the items up and down movement), operating agencies (the lifting movement), luffing and slewing mechanism (the article for horizontal movement), plus the metal body, power units, steering control and the necessary combination of auxiliary devices.
     Knuckle boom cranes including  lift hoist   operation mechanism, luffing mechanism, slewing mechanism and metal structures.
     Crane hoisting mechanism is the basic work of institutions, mostly by hanging system and winch components, there are also lifting heavy objects through the hydraulic system.
     Operating agencies to transport heavy loads or adjust the level of vertical crane working position, usually by the motor, speed reducer, brake and wheel components. Luffing jib crane in only with, the amplitude decreases when the jib looked up, bent over when the amplitude increases, the amplitude of balanced and unbalanced luffing two kinds.
     Rotating mechanism for rotating the boom is driven by the device and the rotary bearing device component.
Hoist and trolley metal structure is the skeleton, the main carrier such as bridge, boom and mast for box-shaped structure or truss structure, but also for the web structure, and some can be used as a steel support beam.

What is not lifting crane ten

What is not lifting crane ten


Hoist equipment industry has such a statement, is "not hanging crane ten," and what is not hanging crane ten yet.
  1, overloading or hanging objects far no weight lifting;
2, the command signal is not clear without hanging;
3, tied up, hanging strong or imbalance may cause sliding without hanging;
4, the hanging objects floating on someone or compartment when not hanging;
5, the structure or components affecting safety defect or damage is not suspended;
6, in case of tension unclear embedded object is not hanging;
7, workplaces of  the Hoist and trolley dark, unable to see the venue, hanging objects and command signals are not hanging;
8, was hanging objects rope tied between the edges and corners and not padded without hanging;
9, oblique hanging crooked pull heavy objects without hanging;
10, the contents of the container is not overfilled hanging items.