CN216975799U

CN216975799U - Valve special for hydrogen

Info

Publication number: CN216975799U
Application number: CN202220620356.5U
Authority: CN
Inventors: 徐海涛; 张传伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-07-15
Anticipated expiration: 2032-03-21

Abstract

The application relates to the technical field of control valves, in particular to a hydrogen special valve which comprises a valve body, a valve rod, a valve cover and a valve clack, wherein the valve cover is arranged at the top of the valve body; a winding gasket and a conversion block are arranged between the valve cover and the valve body, and a packing and a gland are arranged between the valve rod and the valve body; the valve rod outer sleeve is provided with a first corrugated pipe, one end of the first corrugated pipe is connected with the valve cover in a sealing mode, the other end of the first corrugated pipe is connected with the valve rod in a sealing mode, a second corrugated pipe is sleeved outside the first corrugated pipe, one end of the second corrugated pipe is connected with the conversion block in a sealing mode, the other end of the second corrugated pipe is connected with the valve rod in a sealing mode, and the conversion block is connected with the valve body in a sealing mode. So set up, increase bellows seal one on the basis of the seal structure of filler and gland, strengthen the sealed between valve gap and the valve rod, increase bellows seal one on the basis of the seal structure of winding gasket and conversion piece, strengthen the sealed between valve gap and the valve body, guaranteed difficult the revealing of hydrogen.

Description

Valve special for hydrogen

Technical Field

The application relates to the technical field of control valves, in particular to a special valve for hydrogen.

Background

Valves on hydrogen pipelines in the current market generally use general valves, stop valves and ball valves. Stop valves account for the majority, and ordinary stop valve's sealed effect is poor, and frequent switch valve rod easily reveals, and well flange (valve gap) live time is long, and hydrogen is also easily revealed. Not only does it require equipment to be taken out of service to account for valve leaks, but it is also necessary to clean up residual hydrogen. The equipment is out of service for a relatively long time, so the problems of hydrogen valve service life and leakage prevention are particularly important.

Therefore, how to solve the problems of short service life and easy leakage of the existing hydrogen valve is a key technical problem to be solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the related art at least to a certain extent, the present application aims to provide a valve special for hydrogen, which can solve the problems of short service life and easy leakage of the existing hydrogen valve. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the application are described in detail in the following.

The application provides a hydrogen special valve, which comprises a valve body, a valve rod, a valve cover and a valve clack, wherein the valve cover is arranged at the top of the valve body, the valve rod penetrates through the valve cover, the valve clack is arranged in the valve body, and the valve rod is fixedly connected with the valve clack; a winding gasket and a conversion block are arranged between the valve cover and the valve body, and a packing and a gland are arranged between the valve rod and the valve body; the valve rod overcoat is equipped with first bellows, first bellows one end with valve gap sealing connection, the other end with valve rod sealing connection, first bellows overcoat is equipped with the second bellows, second bellows one end with conversion piece sealing connection, the other end with be valve rod sealing connection, just the conversion piece with valve body sealing connection.

Preferably, two ends of the first corrugated pipe are respectively welded with the valve cover and the valve rod in a sealing mode, two ends of the second corrugated pipe are respectively welded with the conversion block and the valve rod in a sealing mode, and the conversion block is welded with the valve body in a sealing mode.

Preferably, the lower part of the valve rod is connected with the first bellows in a sealing mode, and the lower step is connected with the second bellows in a sealing mode.

Preferably, the inner peripheral surface of the conversion block is connected with the first corrugated pipe in a sealing mode, and the outer peripheral surface of the conversion block is connected with the valve body in a sealing mode.

Preferably, the upper end of the valve body is provided with a first annular concave platform for embedding the winding gasket and a second annular concave platform positioned in the first annular concave platform, and the conversion block is connected in the second annular concave platform in a sealing mode.

Preferably, the upper end of the valve cover is provided with a third annular recess in which the packing is embedded, and the gland confines the packing within the third annular recess.

Preferably, the wound gasket is provided as a tetrafluoro mat.

Preferably, the filler is provided as a tetrafluoro filler.

The technical scheme provided by the application can comprise the following beneficial effects:

the valve rod outer sleeve is provided with a first corrugated pipe, one end of the first corrugated pipe is connected with the valve cover in a sealing mode, the other end of the first corrugated pipe is connected with the valve rod in a sealing mode, and a first corrugated pipe seal separated from a medium is formed between the valve cover and the valve rod through the first corrugated pipe. The first corrugated pipe is sleeved with a second corrugated pipe, one end of the second corrugated pipe is connected with the conversion block in a sealing mode, the other end of the second corrugated pipe is connected with the valve rod in a sealing mode, and due to the fact that the conversion block is connected with the valve body in a sealing mode, a second corrugated pipe seal separated from the medium is formed between the valve body and the valve rod through the second corrugated pipe. So set up, increase one bellows seal on the basis of the seal structure of filler and gland, strengthen the sealed between valve gap and the valve rod, increase one bellows seal on the basis of the seal structure of winding gasket and conversion piece, strengthen the sealed between valve gap and the valve body, guaranteed difficult the revealing of hydrogen.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a block diagram of the present hydrogen only valve shown in accordance with some exemplary embodiments.

In the figure: 1. a valve body; 2. a valve flap; 3. a first bellows; 4. a second bellows; 5. a conversion block; 6. winding the gasket; 7. a valve stem; 8. a valve cover; 9. a filler; 10. and (7) pressing the cover.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus or methods consistent with aspects of the present application.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the utility model described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the utility model described in the claims.

Referring to fig. 1, the specific embodiment provides a hydrogen dedicated valve, which includes a valve body 1, a valve rod 7, a valve cover 8 and a valve flap 2, wherein the valve cover 8 is disposed on the top of the valve body 1, the valve rod 7 penetrates through the valve cover 8, the valve flap 2 is disposed in the valve body 1, and the valve rod 7 is fixedly connected with the valve flap 2.

A winding gasket 6 and a conversion block 5 are arranged between the valve cover 8 and the valve body 1, and the sealing connection between the valve cover 8 and the valve body 1 is realized through the structures of the winding gasket 6 and the conversion block 5. Specifically, the upper end of valve body 1 is provided with first annular concave station and second annular concave station, and second annular concave station is located first annular concave station, and when connecting, conversion piece 5 is embedded into in the second annular concave station and sealing connection is in the second annular concave station, and winding gasket 6 is embedded into first annular concave station, and winding gasket 6 offsets with conversion piece 5, compresses tightly winding gasket 6 and conversion piece 5 through valve gap 8, realizes sealing connection.

And a packing 9 and a gland 10 are arranged between the valve rod 7 and the valve body 1, and the sealing connection between the valve cover 8 and the valve rod 7 is realized through the structures of the packing 9 and the gland 10. Specifically, the upper end of the valve cover 8 is provided with a third annular concave platform, the third annular concave platform is embedded with a packing 9 and a gland 10, the packing 9 is limited in the third annular concave platform through the gland 10, and the sealing connection between the valve cover 8 and the valve rod 7 is realized.

The valve rod 7 is sleeved with a first corrugated pipe 3, one end of the first corrugated pipe 3 is connected with the valve cover 8 in a sealing mode, the other end of the first corrugated pipe is connected with the valve rod 7 in a sealing mode, and a first corrugated pipe seal separated from a medium is formed between the valve cover 8 and the valve rod 7 through the first corrugated pipe 3.

The second corrugated pipe 4 is sleeved outside the first corrugated pipe 3, one end of the second corrugated pipe 4 is in sealing connection with the conversion block 5, the other end of the second corrugated pipe is in sealing connection with the valve rod 7, and due to the fact that the conversion block 5 is in sealing connection with the valve body 1, a second corrugated pipe seal separated from a medium is formed between the valve body 1 and the valve rod 7 through the second corrugated pipe 4.

So set up, increase bellows seal one on the basis of the seal structure of packing 9 and gland 10, strengthen the sealed between valve gap 8 and the valve rod 7, increase bellows seal one on the basis of the seal structure of winding gasket 6 and conversion piece 5, strengthen the sealed between valve gap 8 and the valve body 1, guaranteed difficult the revealing of hydrogen.

In this embodiment, the two ends of the first bellows 3 are respectively welded with the valve cap 8 and the valve rod 7 in a sealing manner, the two ends of the second bellows 4 are respectively welded with the conversion block 5 and the valve rod 7 in a sealing manner, and the conversion block 5 is welded with the valve body 1 in a sealing manner. Like this, the form of seal welding, simple structure is stable, the operation processing of being convenient for.

Wherein, the outer peripheral surface of the lower part of the valve rod 7 is connected with the first corrugated pipe 3 in a sealing way, and the outer peripheral surface of the lower step of the valve rod 7 is connected with the second corrugated pipe 4 in a sealing way.

Correspondingly, the inner peripheral surface of the conversion block 5 is connected with the first corrugated pipe 3 in a sealing way, and the outer peripheral surface is connected with the valve body 1 in a sealing way.

Thus, a gap is formed between the first bellows 3 and the second bellows 4, and the stability of the sealing connection is improved.

Specifically, the winding shim 6 is provided as a tetrafluoro pad, and the filler 9 is provided as a tetrafluoro filler.

It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like as used herein, are intended to indicate an orientation or positional relationship relative to that shown in the drawings, but are merely used to facilitate the description of the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description herein, it is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The multiple schemes provided by the application comprise basic schemes of the schemes, are independent of each other and are not restricted to each other, but can be combined with each other under the condition of no conflict, so that multiple effects are achieved together.

While embodiments of the present application have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present application, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. The valve special for the hydrogen is characterized by comprising a valve body (1), a valve rod (7), a valve cover (8) and a valve clack (2), wherein the valve cover (8) is arranged at the top of the valve body (1), the valve rod (7) penetrates through the valve cover (8), the valve clack (2) is arranged in the valve body (1), and the valve rod (7) is fixedly connected with the valve clack (2); a winding gasket (6) and a conversion block (5) are arranged between the valve cover (8) and the valve body (1), and a packing (9) and a gland (10) are arranged between the valve rod (7) and the valve body (1); valve rod (7) overcoat is equipped with first bellows (3), first bellows (3) one end with valve gap (8) sealing connection, the other end with valve rod (7) sealing connection, first bellows (3) overcoat is equipped with second bellows (4), second bellows (4) one end with conversion piece (5) sealing connection, the other end with be valve rod (7) sealing connection, just conversion piece (5) with valve body (1) sealing connection.

2. The valve special for hydrogen according to claim 1, wherein two ends of the first bellows (3) are respectively welded with the valve cover (8) and the valve rod (7) in a sealing manner, two ends of the second bellows (4) are respectively welded with the conversion block (5) and the valve rod (7) in a sealing manner, and the conversion block (5) is welded with the valve body (1) in a sealing manner.

3. Valve for hydrogen gas exclusive use according to claim 1, characterized in that the lower part of the valve stem (7) is in sealing connection with the first bellow (3) and the lower step is in sealing connection with the second bellow (4).

4. The valve dedicated to hydrogen gas according to claim 1, wherein an inner peripheral surface of the conversion block (5) is hermetically connected to the first bellows (3), and an outer peripheral surface thereof is hermetically connected to the valve body (1).

5. Valve for the exclusive use of hydrogen according to claim 1, characterized in that the upper end of the valve body (1) is provided with a first annular recess in which the wound gasket (6) is embedded and a second annular recess in which the conversion block (5) is sealingly connected.

6. Valve for hydrogen only, according to claim 1, characterized in that the upper end of the valve cover (8) is provided with a third annular recess in which the packing (9) is embedded, the gland (10) confining the packing (9) inside the third annular recess.

7. Valve specific for hydrogen gas according to claim 1, characterized in that the wound gasket (6) is provided as a tetrafluoro mat.

8. Valve for hydrogen only, according to claim 1, characterized in that the filler (9) is provided as a tetrafluoro filler.