Air exhaust check valve

The utility model belongs to the technical field of air exhaust check valves, and discloses an air exhaust check valve. The air exhaust check valve comprises a valve body, a valve seat is fixedly installed in the valve body, a valve clack is movably connected to the position, located above the valve seat, in the valve body through a rocker arm, the upper end of the valve body is fixedly connected with an end cover through a bolt, the upper surface of the end cover is fixedly connected with an executing mechanism through a support, and the output end of the executing mechanism is fixedly connected with a valve rod through a coupler. The bottom end of the valve rod extends into the valve body, a cleaning mechanism is arranged in the valve seat and comprises a strip-shaped groove, and the strip-shaped groove is formed in the valve seat. According to the air exhaust check valve, through the arrangement of the cleaning mechanism, impurities or particles or viscous materials stuck or clamped on the inner wall of th