Sewage discharge device

A sewage discharge device, comprising

• a drain pipe, and
• a main box body;
• wherein
• the sewage discharge device is detachably and hermetically connected to a sewage tank;
• a drain control valve and a self-priming drain pump are provided inside the main box body;
• a first end of the drain control valve is detachably and hermetically connected to the drain pipe, and a second end of the drain control valve is detachably and hermetically connected to the self-priming drain pump;
• the self-priming drain pump is provided with a drain nozzle and a cleaning coupling;
• the drain nozzle is detachably and hermetically connected to a sewage pipe;
• the drain nozzle and the cleaning coupling protrude outside the main box body;
• the self-priming drain pump comprises a motor, an impeller, a pump body, a crushing blade and a pump connector;
• a rotating shaft of the motor drives the impeller to rotate;
• the drain nozzle is arranged on the pump body;
• the crushing blade is rotatably arranged at a first end of the pump body, and a second end of the pump body is detachably fixed to the motor;
• a first end of the pump connector is detachably fixed to the first end of the pump body, and a second end of the pump connector is hermetically connected to the second end of the drain control valve;
• a cleaning water inlet is arranged at a middle of the pump connector and protrudes from the middle of the pump connector;
• the cleaning coupling is hermetically connected to an outside of the cleaning water inlet;
• and
• a one-way valve is provided inside the cleaning coupling, and the one-way valve is provided between the cleaning water inlet and the cleaning coupling.