PLC controlled mine hoist brake device

Mine hoist 1 ton chain hoist is an important protective device mine hoist. The braking device can be summarized as follows:

(1) at the end or lifting hoist not work reliably live gate hoist.
(2) speed hoist participate in the deceleration phase control.
(3) As a safety mechanism in the event of an emergency, to enhance the system protection.
(4) double drum hoist rope clutch when opening tune, replacement level, adjust the rope length, can live live drum brake, release the die roll to be adjusted rope operation.
     Currently 1 phase hoist brake disc brake mostly braking system consists of brake and hydraulic components. In the hoist operation use, although the design of the brake system tuning braking torque over multiple hoist static torque of three times, but still due to brake system failure caused over volume, squat cans and other accidents, causing serious economic loss.
     According to the analysis of the reliability of the braking system, brake system, brake disc causes of accidents caused by:
(1) hydraulic standing emergency braking, poor oil return pipe.
(2) hydraulic brake pressure regulator stability is not enough work.
(3) residual pressure is too high, the solenoid valve failure.
(4) brake failure, such as fatigue or rupture disc springs, brake shoe pollution caused by insufficient braking torque and so on. The electronically controlled part of the entire hydraulic station programmable controller (PLC), which will greatly improve the reliability of electronic control systems; and increase interaction with the field devices match the flexibility to achieve a variety of functional changes.