Kitchen flue check valve

The utility model discloses a kitchen flue check valve, it contains the hollow valve body of a cylindricality, and the inside tilting?fixed of above -mentioned valve body has a stationary blade, and it has the vent to open on the stationary blade, but through with the stationary blade joint and cover sealing up a door and fix increase the weight of the iron plate body realize the sealing up a door effect of self return on sealing up a door of vent to even owing to increase the weight of the block to increase the weight of to adhere to the greasy dirt on the block and also can not influence its effect, use stability more. 本实用新型公开种厨房烟道止逆阀，其包含柱形空心阀体，上述阀体内部倾斜固定有固定片，固定片上开有通风口，通过与固定片卡接并覆盖住通风口的封门和固定在封门上的加重铁块体实现封门可自动回位的效果，并且由于是加重块体即使加重块体上附着油污也不会影响其效果，使用更为的稳定。