The invention relates to an air inlet check valve. The air inlet check valve is characterized in that an air inlet pipe is provided with an air hole and a bottom plate; the bottom plate and the air hole are connected through a support; a sealing gasket which can slide along the air hole is arranged in the air hole; a spring positioning base is arranged at the top of the air hole; a guide stand column which is matched with the sealing gasket is arranged on the inner wall of the air hole; the spring positioning base is formed by connecting a base plate and a flange; meshes are formed in the base plate, and the spring positioning base and the air hole are assembled in an interference mode; the air hole is in the shape of a cylinder and is a straight channel or a bent channel; the guide stand column is arranged on the inner wall of the air hole, the inner side face of the guide stand column is an arc surface, and the inner side face of the guide stand column is matched with the outer side face of the sealing gasket. The air inlet check valve is accurate, reliable and good in sealing effect, and parts are unlikely to be abraded; meanwhile, the structure is simple, small and exquisite, the shape of the air hole can be changed, and the application range is wide.
Air inlet check valve
2016-02-10
Patent
Electronic Resource
English