Self-cleaning dirt separator

The utility model relates to the technical field of dirt separators, in particular to a self-cleaning dirt separator, which comprises a tank body, a liquid inlet is arranged on the outer side of the tank body, a sediment blow-down valve is arranged below the tank body, a tank cover is connected above the tank body through a flange, a liquid outlet is arranged above the tank cover, and the sediment blow-down valve is arranged below the tank cover. A partition plate is arranged in the tank body and located above the liquid inlet, a guide pipe is arranged in the center of the partition plate and located below the partition plate, and a spiral filter plate is arranged on the outer side of the guide pipe. The liquid inlet pipe is positioned at the upper end of the spiral filter plate, and the diameter of the spiral filter plate is equal to the inner diameter of the coffin body, so that sewage entering from the liquid inlet pipe can only rotationally flow down from the upper part of the spiral filter plate; large p