Suction filtration tank with washing function

The utility model relates to the technical field of suction filtration tanks, in particular to a suction filtration tank with a washing function, which comprises a suction filtration tank body and a suction filtration cover plate, the suction filtration cover plate comprises an outer-layer plate, an inner-layer plate and a washing component, the inner-layer plate is clamped in the outer-layer plate, the washing component comprises a lapping disc and a plurality of washing strips fixed on the outer wall of the circumference of the lapping disc, and the washing strips are connected with the outer-layer plate. The top of the lapping plate is fixed to the bottom of the inner layer plate through two long bolts. The lifting rod is in threaded connection with lug plates, the left side and the right side of the inner-layer plate are fixed to the head ends of the lug plates on the same side, the driving part comprises a rotating inner rod, a rotating outer rod and a convex circle, and the lower rotating inner rod arra