Valve and sealing structure thereof

Abstract

A sealing structure, including a stuffing box (2) and a valve cover (3). The side wall of the stuffing box (2) is provided with an external thread (21) and a sealing groove (22) used for mounting a first sealing ring (4); the valve cover (3) is provided with a mounting hole; when the stuffing box (2) is mounted in the mounting hole of the valve cover (3), and the stuffing box (2) and the valve cover (3) are sealed by means of the first sealing ring (4), an axial length of a connection between the external thread (21) and the valve cover (3) is L1, and a distance between a connection position of a connecting hole section (301) and a sealing hole section (302) in the mounting hole and the lower end face of the sealing groove (22) is L2, wherein L1>L2. According to the sealing structure, the risk of hurting people due to the fact that the stuffing box (2) is ejected by the residual high pressure in the valve cover (3) can be avoided, and the stuffing box can be conveniently taken down from a shaft. Also disclosed is a valve including the sealing structure.

Dependencies are inferred from the claim text.