Hydraulic oil form certain pressure vane pump, the 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, improve the 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 values.
The piston of the cylinder moves downwards (ie the weight falls).The hydraulic oil enters the upper end of the cylinder through the explosion-proof solenoid directional valve, and the return oil from the lower end of the cylinder returns to the tank through the balance valve, the hydraulic control one-way valve, the throttle valve and the flameproof solenoid directional valve.
In order to make the heavy weight fall steadily and brake safely and reliably, a balancing valve is set on the return circuit to balance the loop and maintain the pressure so that the falling speed is not changed by the heavy weight. The throttle valve regulates the flow and controls the lifting speed.
In order to make the brake safe and reliable, prevent accidents, increase the hydraulic control one-way valve, both hydraulic lock, to ensure the safety of the hydraulic pipeline when accidental burst.Overload sound alarm is installed to distinguish overload or equipment failure
