Release valve upper cover for railway freight car

The utility model discloses a release valve upper cover for railway freight car. The release valve upper cover is one -time molding's the porous plate structure of moulding plastics, and each hole is release valve upper cover and the fixed installation of freight train accessory and use the hole, each hole site in the plate structure middle part and all around, be located the middle part hole and be located around have the splice bar of protruding structure between the hole, the splice bar is the same with each hole height with the height of each jogged joint end, and the upper surface of splice bar forms the straight line connection between two holes. The utility model discloses the release valve upper cover adopts the shooting technique, release valve upper cover fender middle part hole with be located the splice bar that has protruding structure all around between the hole, the sharp connection structure of splice bar use of surface has further strengthened intensity, the utility model discloses combined m