Improved elbow structure of sewage tank pump suction port

The utility model discloses an improved elbow structure of a dirty liquid tank pump suction port, which comprises a dirty liquid tank, the bottom tank wall of the dirty liquid tank is provided with the pump suction port, the inside of the pump suction port penetrates through an elbow, one end of the elbow outside the dirty liquid tank is connected to a valve, one end of the elbow inside the dirty liquid tank is in a 90-degree bending state, and the other end of the elbow is in a 90-degree bending state. A partition plate is installed on a lower opening in the neck section, and a plurality of screen holes are formed in the partition plate. According to the utility model, the damage of the pressure in the dirty liquid tank to the self-circulation pump is effectively reduced, the maintenance frequency of the self-circulation pump is reduced, the failure rate of the self-circulation pump is reduced, and the economic loss in the production process is reduced. 本实用新型公开了一种污液罐泵吸口的改进式弯头结构，包括污液罐，所述污液罐的底部罐壁上开有泵吸口，所述泵吸口的内