1.Dispatch Winch medium pressure system: The medium pressure system of the explosion-proof main shaft of the coal mine is provided with pressure oil by the pump in the double front pump to complete the braking, operation control, safety and rope adjustment. The system components are integrated with the medium pressure valve.
A. Brake circuit: The brake circuit is provided by the pump in the pump. The oil source is provided to the disc brake cylinder by an oil filter, a hydraulic valve, an explosion-proof solenoid valve, and a hydraulic screw switch to make the disc brake. Turn on the brakes.
The braking circuit has working braking, secondary braking and emergency braking functions, which can ensure stable, safe and reliable braking under normal working conditions and accidents.
B. Operation control circuit: This circuit has a throttle valve and a working valve. When the operating handle is pressed, its displacement is proportional to the operating valve and the secondary output pressure, and changes in proportion to the output flow of the variable pump.
C. Rotating rope circuit: The medium pressure system pressure oil enters the hydraulic cylinder of the rope adjusting clutch through hydraulic bolt switch, manual directional valve and hydraulic lock, and adjusts the opening and closing of the directional valve of the rope clutch through manual control. If the clutch is not operated, the hydraulic screw switch should be turned off, and the operating cover should be closed to prevent misalignment of the rope clutch.
D. Hydraulic system safety circuit: In order to meet the safety regulations of the coal mine, Dispatch Winch has designed various protection measures for the hydraulic system, such as overload protection, overspeed protection, constant power protection, and protection near the wellhead over 2m / s. Deceleration point deceleration protection, speed limit protection, roll protection, control oil pump, pressure loss protection, pressure loss of oil supply system and pressure loss of main oil system.
