The BQS series mine flameproof submerged sand discharge pump is composed of a water filled submersible three phase asynchronous motor and a multi-stage centrifugal pump. Execute the GB 3836.1, GB 3836.2, MT/T671 standard. Compared with the traditional centrifugal pump, it has the advantages of convenient installation and maintenance, not afraid of water, safe and reliable operation, stable performance, low vibration noise, high efficiency, compact structure and low operating cost. At the same time, it can not build the pump room and carry out automatic control. It is especially suitable for the large water drop and the drainage of the water hazard place. . According to the actual application environment, the flow guide can be added to the outside of the unit to increase its operational reliability. Because the inner cavity of the motor is filled with clear water, it will not generate electric sparks and explode when working in the water. The pump and motor of the electric pump are split structure, which can be transported separately, and can be installed vertically, horizontally and obliquely.