Of preventing wind diaphragm pneumatic film executor

The utility model discloses an of preventing wind diaphragm pneumatic film executor goes up the structure of borduring that membrane lid and the annular seal limit outer fringe of the periphery of membrane lid down were equipped with cladding diaphragm neighboring, and the neighboring clamp of diaphragm is established between the annular seal limit of last membrane lid and membrane lid down, and the upper and lower two sides of diaphragm periphery all is equipped with protrudingly in the protruding muscle of diaphragm, go up that annular seal edge that membrane lid and lower membrane covered is equipped with and the recess that protruding muscle corresponds, the tank bottom of recess form protruding in last membrane lid and down the membrane cover the bulging limit on annular seal limit, protection casing about the periphery side of upper and lower membrane lid is equipped with respectively, upper and lower protection casing support respectively presses at the last membrane lid and the bulging edge of membrane lid down, go up membrane lid and lower membrane cover through the setting last protection casing under and the fixing bolt on the protection casing be connected and fix. The utility model discloses a pneumatic film executor environment has very high practical value to little, the executor good reliability of diaphragm influence, long service life.