CN203670832U

CN203670832U - Butterfly valve of spring locking type structure

Info

Publication number: CN203670832U
Application number: CN201320741484.6U
Authority: CN
Inventors: 李智; 王志坚
Original assignee: Tianjin Krs Valve Co Ltd
Current assignee: Tianjin Krs Valve Co ltd
Priority date: 2013-11-20
Filing date: 2013-11-20
Publication date: 2014-06-25
Anticipated expiration: 2023-11-20

Abstract

The utility model provides a butterfly valve of a spring locking type structure. The butterfly valve comprises a valve body, a valve rod, a valve plate, a valve seat, an O-type ring, a gland, a spring, a sealing ring and a pressing ring. A clamping groove surrounding a through hole of the valve body is formed in the portion, right opposite to the edge of the valve plate when the butterfly valve is in the closed state, of the inner wall of the valve body, the gland is arranged on the outer side of the clamping groove, the spring is arranged on the inner side of the gland, the clamping groove and the spring are matched to fix the valve seat, the valve seat can slide by a small distance between the clamping groove and the spring in the flow direction of media, and the O-type ring is arranged between the valve seat and the valve body. By means of the technical scheme, the sealing performance can be guaranteed both when the butterfly valve is in the positive pressure bearing state and the negative pressure bearing state, and the high pressure can be borne; meanwhile, due to the installation position of the spring, the larger the elastic force of the spring in the compression state is, the better the sealing performance of the butterfly valve is, and the problem that a thin spring in use is prone to losing efficacy is solved.

Description

A kind of butterfly valve with spring latch compact form structure

Technical field

The utility model relates to a kind of butterfly valve, especially a kind of butterfly valve with spring latch compact form structure.

Background technique

Valve industry development now, increasing client needs the positive and negative bidirectional bearing of valve.Original butterfly valve fixing seal ring type sealing surface structure cannot meet the requirement of reverse pressure-bearing.The utlity model has spring latch compact form sealing configuration, can meet bidirectional bearing.

Application number is to have introduced a kind of floating seat two-way hard seal butterfly valve in 201120282845.6 document, spring fitting in this butterfly valve is on the valve body of valve seat inside, when this spring need meet reverse pressure-bearing spring force much smaller than medium the pressure to valve seat, this just makes this spring comparatively speaking thinner, spring easily lost efficacy, and the latus rectum of the valve body that the position of spring is also simultaneously diminishes.

Summary of the invention

Problem to be solved in the utility model is to provide the butterfly valve with spring latch compact form structure of a kind of spring fitting in gland inner side.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of butterfly valve with spring latch compact form structure, comprises valve body, valve rod, valve plate, valve seat, O type circle, gland, spring, seal ring and pressure ring;

Described valve rod runs through and is rotatably mounted on the sidewall of described valve body, and described valve plate is fixed on described valve rod, and drives it to rotate at described valve inner by valve rod;

Described seal ring is fixed the edge at described valve plate by described pressure ring;

On the inwall of described valve body, be provided with a screens groove around valve hole with described butterfly valve just relative position, valve plate edge when the closed state, the outside of described screens groove is provided with a gland, the inner side of this gland is provided with a spring, described screens groove and described spring are fixed described valve seat, and this valve seat can be along media flow direction slip small distance between screens groove and spring;

Between described valve seat and described valve body, be provided with O type circle.

As preferably, described valve plate is outside away from a side of described valve rod, and this valve plate outer side surface edge is provided with a groove, and described seal ring is set in this groove, is outsidely fixed by described pressure ring.

As preferably, described seal ring is multi-layer sealing ring.

Advantage and the good effect that the utlity model has are: adopt technique scheme, make valve in the time of forward pressure-bearing and reverse pressure-bearing, all can guarantee sealability, can bear elevated pressures, the mounting point of spring makes the spring force of compressive state larger simultaneously, the sealing of valve is better, has avoided using the problem easily losing efficacy compared with hairspring.

Accompanying drawing explanation

Fig. 1 is the structural representation with the butterfly valve of spring latch compact form structure;

The working state of butterfly valve when Fig. 2 is medium forward flow;

The working state of butterfly valve when Fig. 3 is medium reverse flow.

In figure: 1, valve body 2, valve rod 3, valve plate 4, valve seat 5, O type circle 6, gland 7, spring 8, multi-layer sealing ring 9, pressure ring

Embodiment

Below with reference to the accompanying drawings and specific embodiment the utility model is made to detailed description.

As shown in Figure 1, the utility model comprises valve body 1, valve rod 2, valve plate 3, valve seat 4, O type circle 5, gland 6, spring 7, multi-layer sealing ring 8 and pressure ring 9.

Valve rod 2 runs through and is rotatably mounted on the sidewall of valve body 1, and valve plate 3 is fixed on valve rod 2, and drives it in valve body 1 inner rotation by valve rod 2.

Valve plate 3 is outside away from a side of valve rod 2, and these valve plate 3 outer side surface edges are provided with a groove, and multi-layer sealing ring 8 is set in this groove, and outside is fixed by pressure ring 9.

On the inwall of valve body 1, be provided with a screens groove around valve body 1 through hole with butterfly valve just relative position, valve plate 3 edges when the closed state, the outside of screens groove is provided with a gland 6, the inner side of this gland 6 is provided with a spring 7, screens groove and spring 7 are fixed valve seat 4, and this valve seat 4 can be along media flow direction slip small distance between screens groove and spring 7.

Between valve seat 4 and valve body 1, be provided with O type circle 5, prevent the leakage of medium.

As shown in Figure 2, in the time of medium forward flow, the left surface of medium extruding valve plate 3 and valve seat 4, the Compress Spring 7 that is at this moment positioned at valve seat 4 right sides applies an elastic force left to this valve seat 4, make the bottom surface of valve seat 4 push multi-layer sealing ring 8 left, reach good sealing effect.

As shown in Figure 3, in the time of medium reverse flow, the right flank of medium extruding valve plate 3 and valve seat 4, the Compress Spring 7 that is simultaneously positioned at valve seat 3 applies an elastic force left to this valve seat 4, that this valve seat 4 slides left until be close to the left surface of valve body 1 screens groove, at this moment valve seat 4 produces enough seal pressures with multi-layer sealing ring 8, has good sealing effect.

Above embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present invention.All equalization variation and improvement etc. of doing according to the utility model scope, within all should still belonging to this patent covering scope.

Claims

1. a butterfly valve with spring latch compact form structure, is characterized in that: comprise valve body (1), valve rod (2), valve plate (3), valve seat (4), O type circle (5), gland (6), spring (7), seal ring and pressure ring (9);

Described valve rod (2) runs through and is rotatably mounted on the sidewall of described valve body (1), and it is upper that described valve plate (3) is fixed on described valve rod (2), and drive it in described valve body (1) inner rotation by valve rod (2);

Described seal ring is fixed the edge in described valve plate (3) by described pressure ring (9);

On the inwall of described valve body (1), be provided with a screens groove around valve body (1) through hole with described butterfly valve just relative position, valve plate (3) edge when the closed state, the outside of described screens groove is provided with a gland (6), the inner side of this gland (6) is provided with a spring (7), described screens groove and described spring (7) are fixed described valve seat (4), and this valve seat (4) can be along media flow direction slip small distance between screens groove and spring (7);

Between described valve seat (4) and described valve body (1), be provided with O type circle (5).

2. the butterfly valve with spring latch compact form structure according to claim 1, it is characterized in that: described valve plate (3) is outside away from a side of described valve rod (2), this valve plate (3) outer side surface edge is provided with a groove, described seal ring is set in this groove, outside fixing by described pressure ring (9).

3. the butterfly valve with spring latch compact form structure according to claim 1, is characterized in that: described seal ring is multi-layer sealing ring (8).