According to the different structures of lifts, they are divided into: scissor type lift (fixed scissor type lift, mobile lift), sleeve type lift, aluminum alloy (pillar) type lifts, curved arm elevators (folding arm updates), oil cylinder straight top lifting devices, guide rail chain type elevators (elevators, cargo elevators), and steel cable hydraulic lifting devices. The hydraulic oil forms a certain pressure by the vane pump, and enters the lower end of the hydraulic cylinder through an oil filter, explosion-proof electromagnetic directional valve, throttle valve, hydraulic control one-way valve, and balance valve, causing the piston of the hydraulic cylinder to move upwards and lift the heavy object. The return oil at the upper end of the hydraulic cylinder returns to the oil tank through the explosion-proof electromagnetic directional valve, and its rated pressure is adjusted through the overflow valve. The reading value on the pressure gauge is observed through the pressure gauge.
