High-efficiency pre-extraction equipment for coal seam of stope face

An efficient pre-pumping device for a coal seam of a stope face belongs to the technical field of coal seam extraction and comprises a fixing frame, a water sealing pipe, a water drainage pipe, a first control valve, a sleeve, a water pump, a fixing plate, a second control valve, a connecting piece and a gas conveying pipe, the front side of the upper portion of the fixing frame is connected with the water sealing pipe, and the bottom of the water sealing pipe is connected with the water drainage pipe; the front side of the lower portion of the fixing frame is connected with a fixing plate. A water pump is installed below the sleeve and fixed to the front side of the right portion of the fixing plate. The left portion of the water sealing pipe is rotationally connected with a second control valve, the front portion of the water sealing pipe is connected with a connecting piece, and the left side of the water sealing pipe is connected with an air conveying pipe. According to the utility model, the pre-pumped w