Emulsion pump station liquid return pipe joint

The utility model discloses a liquid return pipe joint of an emulsion pump station, which is applied to the field of special equipment for underground coal mines, and adopts the technical scheme that a filtering mechanism comprises a square cavity, a trapezoidal spacer block is fixedly connected to the inner wall of the square cavity, a filter screen is fixedly connected to the bottom of the trapezoidal spacer block, an anti-blocking mechanism comprises a spring, and the spring is fixedly connected to the inner wall of the square cavity. The device has the technical effects that the emulsified liquid pressurized by the emulsified liquid pump station flows in the liquid return pipeline, at the moment, the filter screen filters impurities in the emulsified liquid, after the filter screen is blocked, the emulsified liquid pushes the stop block to move upwards to reach the scraper at the bottom of the connecting rod to scrape away the impurities on the surface of the filter screen upwards, and when the scraper is