CN223242114U

CN223242114U - Double-seal stop valve

Info

Publication number: CN223242114U
Application number: CN202422279033.6U
Authority: CN
Inventors: 徐海涛
Original assignee: Beijing Ote Control Valve Co ltd
Current assignee: Beijing Ote Control Valve Co ltd
Priority date: 2024-09-18
Filing date: 2024-09-18
Publication date: 2025-08-19
Anticipated expiration: 2034-09-18

Abstract

The utility model belongs to the field of valves, and particularly relates to a double-seal stop valve. The double-seal stop valve comprises a valve body, a valve rod, a main valve clack, a first sealing surface, a secondary valve clack and a second sealing surface, wherein a cavity is formed in the valve body in the vertical direction, the valve rod is movably arranged in the cavity in the vertical direction, the valve rod is used for sealing the valve body when moving downwards in the vertical direction, the valve rod is used for opening the valve body when moving upwards in the vertical direction, the main valve clack and the first sealing surface are in contact and fit for sealing when the valve rod moves downwards in the vertical direction and seals the valve body, and the secondary valve clack and the second sealing surface are in contact and fit for sealing when the valve rod moves downwards in the vertical direction and seals the valve body. The double-seal stop valve has the advantages that the sealing effect is further improved by arranging the double-layer sealing surface and the main valve clack and the auxiliary valve clack which are matched with the double-layer sealing surface, the defect that the sealing surface of the single-sealing-surface stop valve can be scrapped once damaged is overcome, and the use reliability is improved.

Description

Double-seal stop valve

Technical Field

The utility model belongs to the field of valves, and particularly relates to a double-seal stop valve.

Background

The shut-off valve is a sealed valve that is capable of controlling the flow of various types of fluids, such as air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media. Therefore, the stop valve is very suitable as a key component for cutting off or regulating the flow of fluid, and has a very reliable cutting-off function due to a relatively short opening or closing stroke of the stop valve.

However, all stop valves used in the market at present are single sealing surface stop valves, and once the sealing surface is broken, the stop valves are scrapped, so that the reliability is poor.

Therefore, the technical scheme of the utility model is proposed based on the above.

Disclosure of utility model

In order to solve the problems existing in the prior art, the present utility model provides a double-seal shut-off valve comprising:

The valve body is provided with a cavity along the vertical direction;

The valve rod is movably arranged in the cavity along the vertical direction, the valve rod is used for sealing the valve body when moving downwards along the vertical direction, and the valve rod is used for opening the valve body when moving upwards along the vertical direction;

When the valve rod moves downwards along the vertical direction and seals the valve body, the main valve flap contacts with the first sealing surface and is matched with the first sealing surface to seal;

And when the valve rod moves downwards along the vertical direction and seals the valve body, the auxiliary valve clack contacts with the second sealing surface and is matched with the second sealing surface for sealing.

Preferably, the valve body further comprises an elastic connection part, wherein:

One end of the elastic connecting part is connected with the main valve clack, and the other end of the elastic connecting part is connected with the auxiliary valve clack.

Preferably, the elastic connection part is an elastic metal connection sheet.

Preferably, the first sealing surface is arranged parallel to the second sealing surface.

Preferably, in the vertical direction, the second sealing surface is higher than the first sealing surface.

Preferably, the valve body further comprises a fluid line, wherein:

The fluid line extends through the valve body.

Preferably, the fluid pipeline comprises a first fluid pipeline, a connecting pipeline and a second fluid pipeline which are sequentially connected in a Z shape, wherein:

One end of the first fluid pipeline is an inlet end and is used for introducing fluid;

The other end of the first fluid pipeline is connected with one end of the connecting pipeline;

The other end of the connecting pipeline is connected with one end of the second fluid pipeline;

The other end of the second fluid pipeline is an outlet end for leading out fluid.

In order to facilitate understanding of the scheme of the utility model, the working principle of the double-seal stop valve is described:

When the double-seal stop valve needs to be closed, the valve rod is arranged in the cavity to move downwards along the vertical direction, and at the moment, the valve rod drives the main valve clack and the auxiliary valve clack downwards simultaneously.

When the double-seal stop valve needs to be opened, the valve rod is arranged in the cavity to move upwards along the vertical direction, at the moment, the valve rod drives the auxiliary valve clack upwards to separate from the second sealing surface, then the auxiliary valve clack drives the elastic connecting part and further drives the main valve clack upwards, and after the auxiliary valve clack separates from the second sealing surface, the double-seal stop valve is opened.

The beneficial effects of the utility model are as follows:

According to the double-seal stop valve, the double-layer sealing surface and the main valve clack and the auxiliary valve clack matched with the double-layer sealing surface are arranged, so that the sealing effect is further improved, the defect that the sealing surface of the single-sealing-surface stop valve can be scrapped once being damaged is overcome, and the use reliability is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a first structural schematic diagram of the double seal shut-off valve.

Fig. 2 is a partial enlarged view of a portion a in fig. 1.

Fig. 3 is a second structural schematic diagram of the double seal shut-off valve.

The reference numerals in the drawings are:

1-valve body, 11-chamber, 12-vertical direction, 13-elastic connection part, 14-fluid pipeline, 141-first fluid pipeline, 1411-inlet end, 142-connection pipeline, 143-second fluid pipeline, 1431-outlet end, 2-valve rod, 3-main valve clack, 4-first sealing surface, 5-auxiliary valve clack and 6-second sealing surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality", "a number" or "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, directly connected, indirectly connected via an intermediate medium, and may be in communication with each other between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1

Referring to fig. 1 and 2, the present embodiment provides a double-seal shut-off valve including:

the valve body 1 is provided with a chamber 11 along a vertical direction 12;

The valve rod 2 is movably arranged in the cavity 12 along the vertical direction 12, the valve rod 2 is used for sealing the valve body 1 when moving downwards along the vertical direction 12, and the valve rod 2 is used for opening the valve body 1 when moving upwards along the vertical direction 12;

When the valve rod 2 moves downwards along the vertical direction 12 and seals the valve body 1, the main valve 3 contacts with the first sealing surface 4 and is matched for sealing;

A secondary flap 5 and a second sealing surface 6, said secondary flap 5 and said second sealing surface 6 being in contact and adapted to seal when said valve stem 2 moves downwards in said vertical direction 12 and seals said valve body 1.

Example 2

On the basis of example 1, as an alternative embodiment, referring to fig. 2, the valve body 1 further comprises an elastic connection portion 13, wherein:

One end of the elastic connection part 13 is connected with the main valve flap 3, and the other end of the elastic connection part 13 is connected with the auxiliary valve flap 5.

As an alternative embodiment, the elastic connection portion 13 is an elastic metal connection piece.

By the arrangement, the problem of simultaneous sealing machining tolerance of the double sealing surfaces is solved, and the double sealing surfaces can be sequentially sealed.

Example 3

On the basis of example 1, as an alternative embodiment, with reference to fig. 2, the first sealing surface 4 is arranged parallel to the second sealing surface 6.

As an alternative embodiment, the second sealing surface 6 is higher than the first sealing surface 4 in the vertical direction 12.

Example 4

On the basis of example 1, as an alternative embodiment, with reference to fig. 3, the valve body 1 further comprises a fluid line 14, wherein:

the fluid line 14 extends through the valve body 1.

As an alternative embodiment, the fluid pipeline 14 includes a first fluid pipeline 141, a connecting pipeline 142 and a second fluid pipeline 143 sequentially connected in a "Z" shape, wherein:

One end of the first fluid pipeline 141 is an inlet end 1411 for introducing fluid;

The other end of the first fluid line 141 is connected to one end of the connecting line 142;

The other end of the connecting pipe 142 is connected to one end of the second fluid pipe 143;

The other end of the second fluid line 143 is an outlet port 1431 for the fluid.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A double-seal stop valve, characterized in that the double-seal stop valve comprises:

The valve body is provided with a chamber in a vertical direction;

a valve stem; the valve stem is movably arranged inside the chamber along the vertical direction, and is used to seal the valve body when the valve stem moves downward along the vertical direction, and is used to open the valve body when the valve stem moves upward along the vertical direction;

A main valve disc and a first sealing surface; when the valve stem moves downward in the vertical direction and seals the valve body, the main valve disc and the first sealing surface contact and adapt to seal;

Auxiliary valve flap and a second sealing surface; when the valve stem moves downward along the vertical direction and seals the valve body, the auxiliary valve flap and the second sealing surface contact and adapt to seal.

2. The double-seal stop valve according to claim 1, wherein the valve body further comprises an elastic connecting portion; wherein:

One end of the elastic connection portion is connected to the main valve flap, and the other end of the elastic connection portion is connected to the auxiliary valve flap.

3 . The double-seal stop valve according to claim 2 , wherein the elastic connecting portion is an elastic metal connecting piece.

4 . The double-seal stop valve according to claim 1 , wherein the first sealing surface and the second sealing surface are arranged in parallel.

5 . The double-seal stop valve according to claim 4 , wherein in the vertical direction, the second sealing surface is higher than the first sealing surface.

6. The double-seal stop valve according to claim 1, wherein the valve body further comprises a fluid pipeline; wherein:

The fluid pipeline passes through the valve body.

7. The double-seal stop valve according to claim 6, wherein the fluid pipeline comprises a first fluid pipeline, a connecting pipeline, and a second fluid pipeline connected in sequence in a "Z" shape; wherein:

One end of the first fluid pipeline is an inlet end, used for introducing fluid;

The other end of the first fluid pipeline is connected to one end of the connecting pipeline;

The other end of the connecting pipeline is connected to one end of the second fluid pipeline;