Prevent eccentric stop valve

The utility model provides a prevent eccentric stop valve, it includes valve body (1) and valve clack (4) of stop valve body, it prevents eccentric device in addition, prevent that eccentric device includes and prevent eccentric support and stand pipe (3), it comprises direction quoit (2 -1) and a set of bracing piece (2 -2) to prevent eccentric support, direction quoit (2 -1) is installed on valve body (1) inner wall through a set of bracing piece (2 -2), stand pipe (3) one end is installed in valve clack (4) bottom, the other end assembly of stand pipe (3) is in the direction quoit (2 -1) of preventing eccentric support, the utility model discloses the advantage is: the heavy -calibre stop valve is prescribed a limit to the valve clack and is moved on the axle center under the out of plumb installation circumstances during open/close valve door, prevented that the valve clack is unable sealed because of eccentric wearing and tearing and the valve clack of leading to the fact, has increased the life of valve clack.