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Classification of hoisting gear
Oct 21, 2017

The hoisting tools mainly include chain hoist, clamp lifting gear, lifting suction cup, etc.

Summary:

The chain hoist is composed of a sling, a sling, a sling and a sling. It is a metal sling with a load-bearing capacity of 60, 80, 100 and 120 lifting.

The higher the level, the higher the chain capacity of the same specification.

Advantages:

1) high carrying capacity

2) the safety is good, breaking elongation is greater than 20%

3) the combination form is diverse, versatility and interchangeability

4) adjustable length and easy to store

5) long service life

6) the temperature range is large

7) easy to detect, convenient and quick

Disadvantages:

1) the price is higher than the belt and wire rope

2) self-importance

Lifting point

The lifting point refers to the lifting point that is fixed on the surface of the object and used for lifting weights. It is divided into bolt type and welding type according to the fixed form.

The sling can be divided into a variety of materials, mainly synthetic fiber suspenders.

Overview: synthetic fiber lifting belt adopt high strength polyester (acid and alkali resistant) or polypropylene (alkali), polyamide (not acidproof alkali) industrial strength filament as raw materials, industrial loom weaving or winding through a heart.

Advantages:

1. Protect the hanging objects from damage

2: high strength, light weight, easy to carry and carry on hoisting preparations

3: soft and easy to operate

4: not corrosive or conductive

Disadvantages:

1: the hoisting is easy to cut by sharp corners

2: does not apply to high temperature and high dust environment, using temperature is 100 ℃ or less

3: low wear resistance

4: it is not possible to adjust the length overview at any time: the wire rope is twisted by multiple or multi-strand fine wire, then twisted into a spiral rope by a certain number of strands.

In material handling machinery for lifting, traction, tension and carrying.

Common cored core and steel core two kinds.

Advantages:

1. High carrying capacity

2: light weight

3: cheap price

Disadvantages:

1. The surface is susceptible to wear and erosion, resulting in broken wires affecting the load

2. The hemp core is not suitable for high temperature operation

3: no detour can be carried out

4: testing inconvenience

5: rigid, not easy to store

6: unable to adjust the length of use

5. Non-standard lifting gear

The standard hoisting equipment can not meet all the hoisting requirements in the hoisting process, so it is necessary to design non-standard lifting tools to realize hoisting.

Tongs are usually clamps used for holding, fastening, or lifting tools.

Mechanical lever slab clamp

Use: widely used in steel mills of steel and metallurgical enterprises, the rolling mills of hot rolling mill and the transportation and loading and unloading of the slab in the transportation industry.

Type: 1 according to the different ways of connecting with crane, it is divided into single lug type, double lifting lug type, double pulley block type and double pulley group guide.

2 according to the temperature of the slab being hoisted, the temperature is divided into normal temperature and high temperature.

Features: 1) no power supply, easy to use, no maintenance, reliable, safe and convenient operation.

2) it is generally suitable for a slab which can be transported one or fixed blocks or blocks in a periodic cycle.

Can be designed as a number of adjustable, but not suitable for a number of frequent change of places.

3) the operation efficiency is relatively low.

Automatic lever clamp

Purpose: suitable for steel rolling stock in steel mill.

Features: can automatically realize the transition of 1 block -2 block -1 block, and the number of blocks in the trolley is constantly changing regularly.

At the same time, one slab or two slab can be fixed, and simple adjustment can be made.

Electric lever type slab clamp

Type: 1 according to the different ways of connecting the crane.

2 according to the temperature of the slab being hoisted, the temperature is divided into normal temperature and high temperature.

Use: widely used in steel mills of steel and metallurgical enterprises, the rolling mills of hot rolling mill and the transportation and loading and unloading of the slab in the transportation industry.

Characteristics: 1) mechanical gravity self-locking, safe and reliable;

2) it is equipped with clamping, limit position and simple operation;

3) suitable for a single block of slab;

4) the operating efficiency is higher than mechanical automatic;

5) jaw opening and closing process with the change of the height direction, operation needs to have certain experience, but can be done with the crane hoisting mechanism linkage height change of compensation, solve the problem of height change.

Electric shift type slab clamp

Application: it is widely used in the handling and loading and unloading of the steel mill, the rolling mill, the station, the yard and the billet in the steel mills of steel and metallurgy enterprises.

Characteristics: 1) mechanical gravity self-locking, safe and reliable;

The characteristic is that the movable arm of the clamping jaw is in the clamping holding of the slab, as the driving lift, the moving arm slides down the fixed inclined plane, while the clamping of the billet is getting tighter and tighter.

Eventually the movable arm and the fixed arm become one.

The heavier the slab, the greater the clamping force.

2) it is equipped with clamping and limit position, simple and convenient operation;

Clamp open closed transmission device, equipped with magnetic powder clutch and zero speed switch, when holding it slab, the load increase magnetic powder clutch skid, when the output speed is zero, zero speed switch is detected, the clamping lights light up.

3) suitable for a single block of slab.

For the 94t clamp can be clamped 1~4 pieces, relying on the height detection device CAM switch detection.

4) the operation efficiency is relatively high.

It can be used for automatic control of blank clamp.

For example, the rolling mill table is for use.

5) relatively high cost and relatively complicated maintenance.

Increased electric control system and cable drum;

Increase the transmission equipment, motor, reducer, magnetic powder clutch, electromagnetic brake;

The detection device and equipment are added, such as clamping detection, opening test, test of limit position of travel, high test.

6) it can realize the computer management of slab library.

Automatic lever square billet clamp

Use: widely used in the steel mill of steel and metallurgical enterprises, the rolling mills of hot rolling mill and the transportation and loading and unloading of the billets in the transportation industry.

Type: 1. According to the different ways of connecting the crane, it can be divided into single - lift, double - lift and single - double.

According to the temperature of the billet that was hoisted, it is divided into normal temperature and high temperature.

Features: 1) no power supply, no ground manual assistance, only the driver can directly control the lifting operation;

Easy to use, maintenance free, safe and reliable operation.

2) generally suitable for one or more square billets.

3) high efficiency.

Mechanical lever type vertical clamping clamp

Usage: widely used in cold rolling mill, the hoisting of the finished workshop.

It is also suitable for handling and handling of station, yard, wharf and large roll user.

Characteristics: 1) complete the opening and closing of the jaw with the lifting hook of the crane, mechanical gravity self-locking, simple, safe and reliable.

2) set up a floating tray with the steel coil end joint to ensure that the end surface of the steel coil is not damaged.

It is suitable for the cold rolling mill, which is thin (3 ~0.3 mm).

3) generally not suitable for the plate thickness of less than 0.3mm (silicon steel coil), easy to cause the deformation of the roll.

Lever type internal and external clamping clamp

Application: it is widely used in the finished workshop and heat treatment workshop of cold rolled silicon steel sheet, and also applicable to the finished workshop of cold rolling mill.

Characteristics: 1) complete the opening and closing of the jaw with the lifting hook of the crane, mechanical gravity self-locking, simple, safe and reliable;

2) the inner open clamping mode shall be clamped to the steel volume, and the lifting force balance shall not cause the deformation of the steel coil;

3) ensure that the constant weight of the center of gravity is lifted and the steel roll is lowered, which will not cause any damage to the end surface of the steel coil.

4) the size is relatively short, but the dimensions are larger and the manufacturing cost is relatively high.

5) especially suitable for hoisting of steel coils with thin plate thickness under 0.5mm.

Electric shift - type horizontal roll lifting pliers

Application: widely used in cold rolling mill, especially the automobile.

It is also suitable for the handling and handling of raw material steel coil of the litter factory and electric appliance factory.

Features: 1) equipment to improve automatic detection and control system, with medium and clamping photoelectric detection and load, limit state induction detection and automatic control functions, and set the status display lamp status, operation is very safe and convenient.

2) it has the power of self-locking, load self-locking, torque protection of transmission chain, ensuring the absolute safety and reliability of the hoisting equipment.

3) floating contact steel coil end face device, polyurethane clamp protection and introduction protection, ensure no damage to steel volume.

4) the system is less rigid, and it is not suitable for the hoisting of hot roll.

Electric lever type bench lifting pliers

Type: the temperature of the hoisting steel is divided into: normal temperature and high temperature.

Application: it is widely used in hot rolling steel mills of metallurgical enterprises, and it is also suitable for the hoisting of hot rolling rolls in stations, yards, wharfs and large steel rolls.

Characteristics: 1) the lubrication effect of the system is better, which can be self-lubricated and easy to maintain

2) the structure is compact and the width is the smallest.

3) the height is relatively high.

Mechanical lever type bench lifting pliers

Purpose: to be used for the hoisting of horizontal rolls in station, yard and wharf.

Features: 1) no power supply, wide application, especially outdoors.

2) high level of operation required.

3) the change of steel volume outside diameter cannot be too large.

4) the operation efficiency is relatively low.

Hydraulic lever type bench lifting pliers

Application: it is widely used in hot rolling steel mills of metallurgical enterprises, and it is also suitable for the hoisting of hot rolling rolls in stations, yards, wharfs and large steel rolls.

Features: compared with the electric lever type roll, it has the following characteristics

1) the system has good flexibility, quick opening and closing speed and high efficiency.

2) it is not suitable for high temperature steel roll, relatively high cost.

3) maintenance is high, hydraulic system is prone to infiltration.

Recliner C - shaped hook sling

Classification: 1) according to the cross section of the hook, it is divided into structural type, plate type and box girder type.

2) according to the type of the hook, it is divided into copper lining, aluminum liner and polyurethane liner.

Application: it is widely used in hot rolling steel mill and cold rolling mill in steel mills, and it is also suitable for the hoisting of all kinds of rolls in stations, yards, wharfs and large steel rolls.

Features: 1) low cost and convenient maintenance.

2) there are limited requirements for stacking spacing, or hoisting order of steel coil.

3) the operation efficiency is relatively low.

Electric shifting plate stacking lifting pliers

Application: widely used in hot rolling production line for loading and unloading vehicles for stacking.

Characteristics: 1) the horizontal spacing of the legs of each group can be adjusted by electric adjustment, and it is convenient to use, especially suitable for the long stacking of the hanging plate, so as to ensure that the steel plate will not be deformed by the hoisting.

2) the structure is larger and the cost is higher.

Automatic lever lifting pliers

Application: it is suitable for the loading and unloading of broad plate in the mill of metallurgical enterprise.

Features: 1) compared with the sling electric translational type plate advantage is: the weight is lighter, unlimited use of environmental conditions, low cost, simple maintenance, especially can be used for a wide width occasions (width change can reach 1.5 m to 4.8 m).

Its disadvantages: the number of steel plates and plate thickness cannot be changed frequently, and the adjustment is relatively troublesome.

2) compared with the electric disk type hoisting gear, the self-gravity is relatively light, the cost is low, the maintenance is simple and convenient, the safety factor is high, especially when loading.

Its disadvantages, the number of steel plates and plate thickness can not change frequently, the adjustment of relative trouble.

It's called "hoisting suctorial cup".

Use of magnetic force or air pressure to absorb heavy objects.

There are two kinds of magnetic suckers and vacuum suckers.

Magnetic sucker:

The coil consists of a disk and a magnetic coil in the shell (FIG. 1). It is used to absorb the magnetic material and the lifting electromagnet, which is usually used on the crane hook, and its cable is lifted and lowered with the hook.

The principle can be divided into electromagnet and permanent magnet.

Electromagnetism is based on the coil of direct current electric shock absorbent.

To prevent the material from falling when the power is off, the crane with this sucker will generally need backup power.

Permanent magnet by permanent magnets (e.g., aluminum nickel and cobalt or strontium ferrite alloy magnetic suction head) of absorb, electricity degaussing discharge, when the power is no material in danger of falling, but in the degaussing when not clean easy adsorption iron oxide skin, affect the suction.

The round electromagnetic sucker is used the most.

When drawing plate and bar, use rectangular electromagnetic sucker.

The bottom surface of the sucker is mostly flat;

Also has concave arc, to absorb bucket and board roll and so on.

When lifting long pieces of goods, you can use several suction cups to work simultaneously.

Using magnetic chuck learned material temperature does not exceed 600 ℃ in general.

Vacuum sucker:

It consists of vacuum device and soft plastic or bowl rubber suction cup, which can be divided into two types: power and powerless.

Power vacuum sucker USES vacuum pump to obtain a vacuum, and the suction is larger, but there is noise, and it needs a cable or ventilation hose.

No power vacuum, also called self-priming vacuum suction cup, in the filed by hook driven piston rod for vacuum suction cup, do not need power supply, has the advantages of simple structure, no noise, but usually only draw materials under 500 kg.

Vacuum suction cups are commonly used to absorb the surface smooth objects, sucked without being limited by the presence of magnetic conductivity of materials, steel, glass, plastic, wood and cement products can be suction, and can be by picking from a pile of plate, high work efficiency.


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