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Working principle of lifting platform

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

Hydraulic lifts consist of a lift device consisting 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 of the liquid cylinder moves downward (both the weight drops). Hydraulic oil by explosion-proof electromagnetic directional valve to enter the upper end of the liquid cylinder, the lower end of the liquid oil through the balance valve, liquid control one-way valve, throttle valves, flameproof electromagnetic reversing valve back 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.

The electrical control system adopts the explosion-proof button SB1-SB6 to control the rotation of the motor, the commutation of the flameproof electromagnetic reversing valve to keep the load lifting or decreasing, and the time delay is adjusted by the "logo" program to avoid the frequent start of the motor and affect the service life.