Closed pump station for scraper conveyor

The utility model discloses a closed pump station for a scraper conveyor. The closed pump station comprises a pressure filter, an overflow valve, a flushing valve, a safety valve, an oil supplementingone-way valve, a plunger pump, a plunger pump assembly, a control valve bank, a proportional valve, a variable oil cylinder, an oil supplementing pump, an oil return filter, a hydraulic oil tank, a cooler, a first oil inlet/outlet, a second oil inlet/outlet, a flushing oil port and an oil return port. According to the closed pump station for the scraper conveyor, the closed pump station is filledwith oil absorbed by the oil supplementing pump, the plunger pump drives the motor to drive the scraper conveyor to operate, and the proportional valve changes and controls the pressure and directionthrough input current, pushes the proportional valve on the pump to act, changes the pressure at the two ends of the variable oil cylinder and controls the displacement of the plunger pump. The output rotating speed of the scr