Differential pressure flow velocity sensor

The utility model discloses a differential pressure flow velocity sensor. The sensor comprises a sensor main body, an external hose, a low-pressure pipe and a high-pressure port, an adapting pipe is welded at a left side port of the sensor main body; external hoses are welded to the left side of the adapting pipe and the right side port of the sensor body, a cleaning opening is formed in the bottom of the inner wall of the end, close to the external hoses, of the adapting pipe, a sealing cover is embedded in the cleaning opening through threads, a sliding groove is formed in the inner wall ofthe adapting pipe at the upper end of the cleaning opening, and a sliding block is embedded in the sliding groove. By using the sliding rail and the sliding block, the installation operation of the filter plate is facilitated, and the cleaning rod is driven by the handheld rotating shaft to clean the surface of the filter plate, so that the steps of disassembling and cleaning by a user are effectively reduced, and the cle