Eccentric half-ball valve

Abstract

The invention discloses an eccentric half-ball valve, which comprises a valve body, wherein a valve seat and a valve crown which are matched with each other are arranged in the valve body; a pressure ring is arranged between the axial directions of the valve seat and the valve body through matching of a screw and an elastic gasket; axial gaps exist among the pressure ring, the valve seat and the valve body; the radial sealing cylindrical surface of the valve body or the valve seat is provided with at least one ring groove; a sealing ring is sleeved in the ring groove; the pressure ring is further provided with a plurality of fastening screws along the axial direction; and the end face of the top end of each fastening screw is pressed against the end face of the valve body. Compared with an original structure, the eccentric half-ball valve has the advantages that problems existing in the prior art can be solved without making any great change and increasing great cost, the technical requirements on assembly personnel can be lowered, the assembly period is shortened, the production efficiency is increased greatly, and maintenance is more convenient and rapid.

Description

technical field [0001] The invention belongs to the technical field of valves, in particular to an eccentric hemispherical valve. Background technique [0002] At present, most of the sealing between the valve seat and the valve body of the eccentric hemispherical valve adopts the axial end face sealing method. Such as figure 1 , figure 2 As shown, a valve seat 12 and a spherical crown 13 that cooperate with each other are provided in the valve body 11, and a ring groove 14 is opened on the end face of the valve body 11 that is sealed with the valve seat 12, and an O-shaped ring groove is set in the ring groove 14. Ring 18, which is an axial end face sealing structure. When the valve is closed, the sealing surface of the valve seat 12, on the one hand, is one of the components of the valve sealing pair, and must be sealed with the sealing surface of the spherical crown 13, and at the same time, its axial sealing surface is kept in contact with the valve body 11 through t...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the axial end surface sealing structure is adopted between the valve seat and the valve body, and the existing problems are: when assembling the valve seat, it is necessary to ensure that the sealing surface of the valve seat 12 and the spherical crown 13 can be sealed, and it is also necessary to ensure that the valve seat 12 Contact and compress the O-ring 18 on the axial end face, and the compressibility of the O-ring 18 must also be within a reasonable range

However, such frequent failures have brought great trouble to the production and use of customers.

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