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.

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.

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.

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.

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.

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.

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%.

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.

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.

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.

The domestic market situation and development of wire rope

  Over the years, the market continued oversupply of steel wire rope, wire rope market is a buyer's market.rope hoist According to industry analysis of the competitive structure of the industry has a large number of companies, corporate concentration is low, entry and exit barrier, the products quality gap smaller enterprises in the information flow completely, the entire industry in a decentralized competitive basic competitive structure.
       Annual export volume of steel wire rope products in steady growth, there are still some products such as forged class wire rope, wire rope shovels giant, large mine shaft friction hoisting rope, large opencast coal mine, offshore oil drilling, port handling, crane, piling vessels with rope still need to import large quantities. At present, China's import and export price ratio is large rope from a reflection of the physical quality of domestic products with similar foreign products have a certain gap,hoist and trolley the product cost to be further improved.
       Organization's macro-control in the industry and the market's self-regulation, high-strength low relaxation PC strand inflated development has stopped, a new round of expansion rope needs to develop more serious research. Currently, triangular strand wire rope, wire rope to become rope port enterprises competing for the development of hot spots, may cause greater overcapacity.
       Recently some large well-known companies started to increase manpower, material resources, product development,chain block improve the technological content of the product in the domestic market competitiveness greatly improved.

Electric hoist cut down from over regulation failure analysis

When the electric hoist fell down when braking distance exceeds specified requirements, electric wire rope hoist  long-term application, the brake ring wear is too large, the brake spring pressure decreases, the braking force is reduced. The workaround is to adjust the brake bolt or replace the brake ring. Motor temperature is too high should first check whether the overload to use Hulu, overload the motor heat, long-term overload the motor will burn; should also check whether the motor is required duty work, which is one of the reasons causing motor heating, motor running, the brake gap is too small, not fully disengaged, have a great friction,manual hoist friction heat, while also representing an increase of additional load, the motor speed is reduced, the current becomes large fever, you should stop working, re-adjust the brake clearance. Weight rose to the air, can not re-start after stopping the system first checks whether the voltage is too low or too volatile, pay attention to the three-phase motor operation phase, after the shutdown can not start, then you need to check the power phases. Can not stop or limit position to stop this type of situation is still not generally contactor contact welding, when you press the stop switch when the contactor contacts can not be disconnected, the motor running as usual energized, hoist without stopping; to the limit locations such as limit malfunction,hoist and trolley Hulu does not stop. After stopping, repair contactors or stopper, serious damage can not be repaired and must be replaced. Winter construction, especially after the snow, the circuit no fault motor still does not start, the reason is the brake ring frozen to death, if this Shihai forcibly boot, it is easy to burn the motor. Rope only on no less than the reason for the stroke limiter damaged, replace stroke limiter.

Xinjiang regional revitalization imminent construction machinery industry new opportunities and developments

Each construction machinery industry practitioners are aware, the national policy guidance for the entire industry and promote the role should not be overlooked, tracking policy direction construction machinery industry has become a required course for business growth and development.hoist and trolley Since the financial crisis, after the financial crisis in order to ensure the stable development of the transition period, to achieve structural adjustment, promote livelihood purposes, nearly more than a year the Chinese government gradually introduced more than ten regional revitalization plan, subject to the relevant sectors attention.
    Economic revitalization plan infrastructure to advance, while the strategic planning under the guidance of a large number of construction projects will be planned, existing projects will be further accelerated, will lead the construction machinery industry. Therefore, to keep abreast of regional economic development planning, for enterprises to adjust the layout has a very large market guidance.
Recently intensive research through central Xinjiang region, and the central work conference in Xinjiang to disclose information, the central government will increase financial investment in Xinjiang, financial support for their counterparts in provinces,load chain the central enterprises focus on large-scale investment in key projects, it is expected fixed assets in Xinjiang have three huge investment will rise.
Central investment Xinjiang and the Corps continued to tilt, "Twelve Five" period, Xinjiang total fixed assets investment scale than the "Eleventh Five-Year" period to more than double. If you press the "Eleventh Five-Year" 1 trillion yuan of investment scale computing in the next five years, the scale of investment in Xinjiang region will exceed 2 trillion yuan.
    Central to actively promote a new round counterpart Yuanjiang work to accelerate signal leapfrog development in Xinjiang, have been identified Beijing, Tianjin, Shanghai, Guangdong, Liaoning, Shenzhen and other 19 provinces and municipalities bear counterpart support Xinjiang task. A new round of counterpart support period of 2011-2020. "Counterpart Yuanjiang" large-scale capital investment, will promote Xinjiang's economic development.
    Overall, through regional policy, will make Xinjiang's energy strategy will be further strong position, with the speed transportation infrastructure, energy reserves in Xinjiang Xinjiang will translate into tangible wealth, Xinjiang's agricultural resources will accomplish much has become an important part of the development of Xinjiang.
From the current situation, the Xinjiang region in technology and talent, and no special advantage, but in terms of resources is huge potential treasure. In the new round of regional revitalization, according to the Xinjiang government scenario planning, 'second five' period,hoist equipment Xinjiang will continue to focus on advantageous resources transformation strategy in the development of petroleum and petrochemical industry as well as make coal coal coal chemical industry of the article . "
    Achieve petroleum, petrochemical, coal and other resources transformation, is the key to the revitalization of the Xinjiang region to achieve, but these three related construction projects, construction machinery industry has always been a "big customer" gathering place, which we assert that the future Xinjiang region construction machinery demand will increase substantially, cranes and other equipment manufacturing enterprises need to prepare as soon as possible.
    Clear from either the speed or energy infrastructure projects to promote Xinjiang regional revitalization for engineering equipment provided space for development. But note that the Xinjiang region location, climatic conditions are rather special, for construction machinery construction requirements are relatively high, the need for targeted industries and enterprises in research and design, to be able to provide a suitable competitive products.rope hoist Also Xinjiang transport current inconvenience in equipment sales and after-sales service naturally made very high demands.
    Xinjiang regional revitalization soon sounded the horn, we believe that this is the development of construction machinery industry has a new historical opportunity in the upcoming wave of construction, construction machinery industry will play an important role.

Explosion-proof electric hoist control box button using internationally accepted arrow logo symbols

Explosion-proof electric hoist  wire rope hoist  is more common but a rather special, mainly reflected in the "explosion" word, and from this we can see the word on the product's main performance, we detail below explosion-proof electric wire rope hoist is the electronic control system.


Explosion-proof hoist electric control system consists of boxes, explosion-proof button control box, explosion off the fire limiter components. Explosion-proof electrical equipment enclosure securely closed Explosion levels to meet the appropriate requirements of its internal functions and ordinary hoist electrical installations basically the same.
Explosion-proof hoist box internal electrical components are of high quality, reliability and long life of Siemens low-voltage electrical components, minimize failure due to explosion-proof electrical box out of the box number. In addition to the control box to run the opposite direction contactors with electrical interlocking between the outer button button control box is provided with a mechanical interlock between avoid misuse caused by short circuit happening.
Control button box with a fine wire hanging in the explosion-proof lift hoist  box under the ground about 1.5m away from the high position to facilitate personnel. Reset button box with a rotary-type mushroom head type emergency stop switch, convenient in case of emergency, the motor stops running fast.
Button on the control box using the arrow mark internationally accepted symbols and safety AC 36V control voltage. Limiter off the fire-proof control box by the limiter and external guide rods.
Wire rope on the drum Fairlead Card pusher rod thereby triggering the limiter control box contact action,hoist and trolley to cut off the electrical power lifting. By adjusting the position of the guide rod hit the block, you can set the upper and lower limit position gourd, but must ensure that when the hook reaches the lower limit rope on the drum 2 laps still left margin.

Damaged wire rope electric hoist treatment measures:

1 immediately press the emergency stop button to cut off electric hoist power;
2 Hoist and trolley Replace the wire rope (chain), and equipment overhaul;
3 Confirm the device without failure after continued use.
Rope damage prevention measures:
A rope used to meet the load capacity to carry the load,lever hoist prohibit the use of wire rope hoist direct bearing load;
2manual hoist using an appropriate hoist rated load;
3 timely replacement of excessive wear rope.