The present invention discloses an anti-drip opening and closing buffer
check valve, comprising a valve body, a
valve seat, a valve disc, a
piston, a spring and a valve cover, wherein the valve body comprises two upper and lower chambers, a
piston is arranged in a cylinder, a valve cover is arranged on the top of the cylinder, a reset spring is arranged in the cylinder, an air hole is arranged on the valve cover, the air hole connects the cylinder and the air outside the valve body, the end of the
piston is connected to the valve disc through a connecting piece, and air enters into the cylinder cavity through the air hole during the downward movement of the piston in the cylinder, and the air hole plays a role of slowly closing the valve, which can eliminate the
water hammer phenomenon, and a self-locking clamping mechanism is also arranged in the valve body, which utilizes a
cam rocker mechanism to convert a
large deformation of the spring into a small deformation of the valve disc, and the corresponding force will be amplified, and the self-
locking mechanism has a self-locking property, which can effectively improve the reliability of the seal.