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Working Principle Of Lifting Equipment

Manhand Equipment Co.,Ltd | Updated: Apr 19, 2017

Most lifting devices begin to work vertically or vertically with a horizontal working stroke after the feed is taken, unloading the destination, empty travel to the pickup location, completing a work cycle, and then carrying out a second lifting or transporting. Generally speaking, when lifting equipment work, picking, moving and unloading are carried out sequentially, the work of the corresponding agencies is intermittent. Lifting equipment is mainly used to carry items, equipped with grab bucket can carry coal, ore, food and other scattered materials, equipped with barrels can be lifted to transport liquid materials such as molten steel. Some lifting appliances such as elevators can also be used for manned. In some use occasions, lifting equipment or the main operating machinery, such as at the port and station handling materials crane is the main operating machinery.

Lifting equipment works very much the same, the following is a brief introduction to our daily use of the most frequent lifts working principle:

The elevator consists of a walking mechanism, a hydraulic mechanism, an electric control mechanism, and a supporting mechanism. Hydraulic oil by vane pumps to form a certain pressure, through the oil filter, flameproof electromagnetic directional valve, throttle valve, liquid control one-way valve, balancing valves into the bottom of the liquid cylinder, so that the piston upward movement of the liquid cylinder, lifting heavy weights, the upper end of the cylinder back oil through the explosion-proof electromagnetic reversing valve, its rated pressure through the overflow valve adjusted to observe the pressure gauge reading values.

The piston downward movement of the liquid cylinder, the hydraulic oil through the explosion-proof electromagnetic reversing valve enters the upper end of the liquid cylinder, the liquid cylinder bottom back to the oil through the equilibrium valve, the liquid control one-way valve, the throttle valves, the flameproof electromagnetic reversing valve return to the tank. In order to reduce the weight of a smooth, safe and reliable braking, in the back of the oil circuit to set the balance valve, balancing the loop, keep the pressure, so that the speed of descent from heavy weight change, by throttling valve regulating flow, control lifting speed. In order to make the brake safe and reliable, prevent accidents, increase the hydraulic control one-way valve, that is, the hydrostatic lock, to ensure that the hydraulic pipeline when accidental burst can safely self-locking. An overload sound alarm device is installed to distinguish between overloading or faulty equipment.

Electrical control system through the explosion-proof button SB1-SB6 to control the motor rotation, flameproof electromagnetic reversing valve to maintain the load or decline, and through the "logo" program to adjust the time delay