Pulsator flapper device

The utility model discloses a pulsator flapper device mainly comprises impeller protective housing, the impeller body and manhole cover, its the impeller protective housing be square, the left conch wall in square impeller protective housing middle part sets up outside small circular arc, the right conch wall in square impeller protective housing middle part sets up outside orthodrome, the radianof small circular arc and orthodrome is unanimous with the external roundness of impeller, impeller protective housing both ends set up flange, the impeller protective housing internal connection impeller body, the impeller body be for circular, is provided with square hole, square hole outer joint manhole cover on one side of in the middle part of the impeller protective housing. The utility model discloses describing the material to loosing and effectively cushioning, the pan feeding mouth is in the wall state with the discharge gate all the time, reaches the purpose of lock gas, blocks thesmoke and dust discharge t