Automatic pneumatic sewage pump

The utility model provides an automatic pneumatic sewage pump, relating to a pump, an inlet and an outlet. A unidirectional check valve is arranged on the inlet. One end of the outlet is connected with a drainage pipe. The other end of the drainage pipe is positioned at the bottom of the inner cavity of the pump. The unidirectional check valve is connected between the outlet and the drainage pipe. An air control valve is connected to the pump. The compressed air can enter in the air control valve; the air in the pump can be discharged according to the height of the water surface in the pump. Because the machine is not provided with rotation components, the drainage is implemented through the pressure of the compressed air. The structure thereof is an air valve control switch. The automatic pneumatic sewage pump can operate without manned control. The drainage is automatic. The pump can automatically stop working after the water is discharged. The work is automatic. The automatic drainage function is realized. The human resource is saved. The pump adopts the compressed air as the dynamic force. The problem of blasting due to using the electric control is solved. The explosion proof function is provided. The automatic pneumatic sewage pump can be applied to the environment of the explosive gas of the coal mine, the underground, etc. The safety production is realized.