A COUNTER-CLAMPING CHECK VALVE OF DOUBLE VALVE FLAPS

摘要

A check valve of double valve flaps includes a valve body (1), a valve plate and a fixed shaft (4). Said valve plate is composed of a pair of semicircular valve flaps (2) and is rotatably connected via a pin shaft (3) provided on the straight edges of the valve flaps (2). aid pin shaft (3) and fixed shaft (4) are fixed in the valve body (1) through the bearing seats (5) provided on their two ends, respectively. A protuberance (10) which expands outwards is provided on the bottom of the bearing seat (5) close to the inside end part of the valve body (1), and a spacing mounting hole (9) is provided on the valve body (1) on the position corresponding to the protuberance (10) to cooperate with it; a key way (12) is provided on the bottom of the bearing seat (5) close to the outside end part of the valve body (1), and slide way (11) is provided on the inner wall of the valve body (1) on the position corresponding to the key way (12), and the bearing seat (5) is fixedly connected with the valve body (1) through a key (7) which cooperates with the keyhole formed by the key way (12) and the slide way (11).