Working Principle Of Hoist Lifting Equipment

The majority of hoist lifting equipment begin vertical or vertical with horizontal stroke after picking. Starting to uninstall after reach the destination, then go to the taking place to finish a working cycle. After these, people begin lifting or handling second times. Generally speaking, reclaiming,transport and unloading is sequentially while the hoist lifting equipment working. And each corresponding institutions is intermittent. Hoist lifting equipment is mainly used for carrying piece goods. Certainly if it is equipped with grab, it can carry coal, ore, grain and other bulk material. It also could lift liquid steel and other materials after equipped with barrel. Some lifting equipment can carry people, such as elevator. At some occasion, lifting equipment is also main working machine. Such as hoist in the port and station which used for handling of material.

Working principle of every hoist lifting equipment is similar. Hoist is composed of walking mechanism, hydraulic mechanism, electric control mechanism and supporting mechanism. Hydraulic oil form pressure by the vane pump and get into the end of the liquid cylinder through oil filter, flameproof electromagnetic reversing valve, throttle valve, check valve and balance valve. It make the piston cylinder upward movement and lifting weights.

Hydraulic cylinder piston moved to downward and hydraulic oil enter the liquid cylinder top through the explosion-proof solenoid valve. The return oil back to the tank through balance valve, check valve, throttle valve and explosion-proof solenoid valve. In order to make the elevator falling steadily and braking safe and reliable, it usually set balancing valve in the oil return line.

Security Check For Lifting Equipment

No matter what the industry is, you must take a safety inspection before the lifting equipment working. While you are taking repair and maintenance, you should be more careful. You had better ensure that there is nothing abnormal conditions. If there is something wrong in lifting equipment, we must treatment it in time and ensure hoisting machinery operated safely to avoid accidents. Kill every problem in the bud can not only be responsible for project progress, but also be responsible for the life and property of construction personnel.

1.Check marking and anti dropping device of the hook, they must meet the requirements. The hook must be without cracks, spalling and other defects.

2.The specification and model of wire rope should be meet design requirement. Wire rope wear, broken wires, kink, crushed, bent, broken strands, corrosion all can not exceed the standard.

3.Check the brake rigging, reel and pulley. The pulley should equipped with anti slip groove device. The pulley can rotate flexibly.

4.Reducer runs without sharp metal friction sound, vibration, radiation and other abnormal sound. Reducer lubrication oil, oil level and open gear lubrication all should meet the requirements.

5.There is none fatigue crack phenomenon on the tread and shaft  of the wheel. Certainly wear can not exceed the standard.