Sewage flow meter with filtering capacity

The sewage flowmeter with the filtering capacity comprises a flowmeter body, the front face of the flowmeter body is communicated with a square pipe, the surface of the inner wall of the square pipe is connected with four filtering plates in a sliding mode, the four filtering plates are evenly distributed on the surface of the inner wall of the square pipe, the tops of the filtering plates are fixedly connected with clamping plates, and the clamping plates are connected with the square pipe in a sliding mode. The left side and the right side of the clamping plate are fixedly connected with pressed blocks, the surfaces of the inner walls of the pressed blocks are movably connected with movable blocks, the front faces of the movable blocks are fixedly connected with short rods, the surfaces of the short rods are movably connected with supporting blocks, and the inner sides of the supporting blocks are fixedly connected with the surface of a square pipe; and the surface of the inner wall of the movable block is