Tubular backwashing filter

The utility model discloses a tubular backwashing filter. The device comprises a liquid inlet pipe, a liquid inlet bin, a filtering mechanism, a liquid outlet pipe, a liquid outlet bin and a blowdownsystem, the liquid inlet bin is a hollow cylindrical liquid inlet bin; a flange sealing plate is mounted at the upper end of the liquid inlet bin; the lower end of the liquid inlet bin is a circular end socket, the bottom of the liquid inlet bin is provided with a hole, the hole in the bottom of the liquid inlet bin is communicated with a blow-off pipe, one end of the liquid inlet pipe is communicated with the side wall of the liquid inlet bin, and the other end of the liquid inlet pipe is connected with a blow-off system. A power shaft, an air cylinder and a rotary elbow are arranged in the liquid inlet bin, a liquid inlet round hole is formed in the side wall of the liquid inlet bin, one end of the rotary elbow is communicated with the blow-off pipe, the other end of the rotary elbow iscommunicated with the liqu