Double leaf public flue check valve that suitable heavy -calibre is discharged fume

The utility model relates to a gas exhaust pipeline says technical field, concretely relates to double leaf public flue check valve that suitable heavy -calibre is discharged fume. Including the base, locate on the base the valve body and with the reducing circle that the valve body is connected, be equipped with the valve block structure in the valve body, valve block structure and valve body rotate to be connected, the valve block structure is under including valve block, seal membrane and last valve block in proper order, the both sides that lower valve block and last valve block lie in the seal membrane just all can be dismantled with the seal membrane and are connected. The utility model discloses a change all can be dismantled to each parts, and sealed totally, simple to operate can get rid of dirty gas effectively, stop the flue in harmful gas get into, can thoroughly solve taints of odour, cluster cigarette, pour in down a chimney and the problem of peculiar smell, improve the air quality of kitchen,