Elevator, generally according to the moving mode, structure mode, the different raw materials, can be divided into mobile elevators and stationary lift platform, goods elevator guide rail type, aluminum alloy lift hydraulic lift platform, hydraulic dock leveler, etc.
Although is elevator classification is different, but the principle is the same, the working principle of the elevator is formed by vane pump hydraulic oil pressure, oil filter, flameproof electromagnetic directional valve, throttle valve, hydraulic control one-way valve, balance valve into the lower cylinder, the hydraulic cylinder piston upward movement, higher lift platform ascension weight, the upper cylinder oil return by the flameproof electromagnetic directional valve back to the fuel tank, the rated pressure through the overflow valve adjustment, observing the pressure gauge pressure gauge reading value, and the vertical elevator is used for lifting items or other things, is lifting machinery, have a fixed lifting height, the machine itself is not suspended, when heavy electric lift platform down due to gravity, the hydraulic cylinder piston downward movement, the oil in the hydraulic explosion-proof solenoid directional valve to enter the upper cylinder, and the lower cylinder oil return the balance valve, hydraulic control one-way valve, throttle valve, flameproof electromagnetic directional valve back to tank.
To make the weight fall calm, lift platform safe and reliable braking, set the balance valve on back to oil, balance circuit, maintain pressure, make the falling speed is not affected by weight changes, the throttle valve flow adjustment, control of hydraulic lift platform lifting speed.
In order to make safe and reliable braking, to prevent accidental, increase the hydraulic controlled check valve, hydraulic lock, ensure the safety of burst in hydraulic pipeline accident can self-locking.
Installed the acoustic alarm overload to distinguish overload or equipment failure.
Electronic control system can be explosion-proof buttons to control motor rotation, reversing the flameproof electromagnetic directional valve, in order to keep the load lifting or lowering, also can adjust the amount of time delay adjustment, avoid the frequent starting motor caused by the lift is not flexible, lag, prolong the service life of the lift pump station.
Through to explain in detail the working principle of elevator, we can see, the use of the elevator is very safe, and installation of the overflow valve, adjust the pressure will not too big, so as to ensure the smooth lifting hoist.
Installation of the hydraulic control one-way valve, can prevent lifting platform caused by the burst of hydraulic tubing fell sharply.