CN219102084U

CN219102084U - Ball valve for hydrogen sealing

Info

Publication number: CN219102084U
Application number: CN202223491115.4U
Authority: CN
Inventors: 谢福乐
Original assignee: Heyuan Flowtecal Automatic Control Valve Co ltd
Current assignee: Heyuan Flowtecal Automatic Control Valve Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-05-30
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a ball valve for hydrogen sealing, which comprises a valve body and a valve cover, wherein a valve rod is arranged in the valve body, the valve cover is arranged on the valve body, a first contact plane and a second contact plane are formed between the valve body and the valve cover, the first contact plane and the second contact plane are respectively distributed in different directions, a first groove position is arranged in the first contact plane, a second groove position is arranged in the second contact plane, an O-shaped sealing ring is arranged in the first groove position, a sealing gasket is arranged in the second groove position, and the O-shaped sealing ring and the sealing gasket are in fit contact with the corresponding inner surface of the valve cover. The utility model forms multiple seals, can meet the sealing requirement of hydrogen, and can be used as a sealing device of hydrogen energy.

Description

Ball valve for hydrogen sealing

Technical Field

The utility model relates to a ball valve, in particular to a sealing ball valve mainly aiming at hydrogen sealing.

Background

Ball valves are commonly used as a very common sealing device and are often applied to various types of pipelines, so that corresponding sealing control can be realized on liquid and gas. The condition that the medium is hydrogen has quite high requirements on valve materials, leakage grade and valve cleanliness, and the conventional valve cannot be used on the hydrogen condition.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a ball valve for hydrogen sealing.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a ball valve for hydrogen seal, includes valve body and valve gap, is equipped with the valve rod in the valve body, the valve gap is installed on the valve body, is formed with first contact plane and second contact plane between valve body and the valve gap, and first contact plane and second contact plane are different directions respectively and are arranged, are equipped with first trench in the first contact plane, are equipped with the second trench in the second contact plane, are equipped with O type sealing washer in the first trench, are equipped with sealed the pad in the second trench, O type sealing washer and sealed pad all come into contact with the corresponding internal surface laminating of valve gap.

The O-shaped sealing ring is made of fluororubber.

The sealing gasket is made of high polymer plastic.

The valve rod inner wall is equipped with from the bottom up and is equipped with stopping pad and bearing in proper order, and the valve rod inserts in from bearing, stopping pad, and this valve rod passes through bearing and stopping pad and valve body closely installs.

The bearing is a nonmetallic bearing.

The valve body inner wall is also provided with a filler, the filler is fastened on the valve body inner wall through a filler pad and a pressing piece, the filler pad is attached to the valve rod side wall, and the filler pad is arranged at the bottom of the filler.

The pressing piece comprises a pressing plate, a pressing sleeve and a disc spring, the pressing plate is arranged on the valve body and is fixedly arranged on the upper portion of the valve rod, the pressing sleeve is arranged at the upper end of the packing, and the disc spring presses the pressing sleeve and is connected with the inner wall of the valve body.

The pressing plate is locked and installed with the valve body through bolts.

According to the utility model, the double seal of the valve body and the valve cover is formed through the O-shaped sealing ring and the sealing gasket, so that the sealing performance is improved; and the double sealing between the valve body and the valve rod is realized by utilizing the retaining pad and the filler, so that the gas is ensured not to leak, the integral sealing performance is improved, and the valve can be applied to the sealing of hydrogen energy.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

fig. 2 is an enlarged schematic view at a in fig. 1.

Reference numerals:

the valve body 1, the valve cover 2, the valve rod 3,

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated azimuth or positional relationship is based on the azimuth or positional relationship shown in the drawings, it is merely for convenience of description and simplification of the description, and does not indicate or imply that the indicated apparatus or element must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. 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 one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1 and 2, a ball valve for hydrogen sealing comprises a valve body 1 and a valve cover 2, wherein a valve rod 3 is arranged in the valve body 1, the valve cover 2 is arranged on the valve body 1, a first contact plane and a second contact plane are formed between the valve body 1 and the valve cover 2, the first contact plane and the second contact plane are respectively distributed in different directions, a first groove position is formed in the first contact plane, a second groove position is formed in the second contact plane, an O-shaped sealing ring 4 is arranged in the first groove position, and a sealing gasket 5,O type sealing ring 4 and a sealing gasket 5 are arranged in the second groove position and are in fit contact with the corresponding inner surface of the valve cover 2. The O-shaped sealing ring is made of fluororubber. The sealing gasket is made of elastic high polymer plastic. The O-shaped sealing ring forms a first resealing, and the sealing gasket forms a second resealing, so that the valve has double sealing, and stable and reliable sealing performance between the valve body and the valve cover can be ensured.

The inner wall of the valve rod 3 is provided with a non-metallic bearing 7 and a non-return pad 6 from bottom to top, the valve rod 3 is inserted into the non-metallic bearing 7 and the non-return pad 6, and the valve rod 3 is tightly installed with the valve body 1 through the non-metallic bearing 7 and the non-return pad 6. The retaining pad forms a first seal and position, and the nonmetallic bearing forms a second position, so that double positioning is realized, and accurate installation of the valve rod is ensured.

The inner wall of the valve body 1 is also provided with a packing 8, the packing 8 is fastened on the inner wall of the valve body through a packing pad 9 and a pressing piece, the packing 8 is attached to the side wall of the valve rod 3, and the packing pad is arranged at the bottom of the packing. The packing forms a second seal, thereby providing a double seal between the valve stem and the valve body,

the pressing piece comprises a pressing plate 10, a pressing sleeve 11 and a disc spring 12, wherein the pressing plate 10 is arranged on the valve body 1 and is fixedly arranged on the upper portion of the valve rod 3, the pressing sleeve 11 is arranged at the upper end of the packing 8, and the disc spring 12 presses the pressing sleeve 11 and is connected with the inner wall of the valve body 1. The pressing plate is locked and installed with the valve body through bolts. The disc spring is precompressed and has tension force to act on the pressing sleeve all the time, so that the sealing performance of the packing in the whole service cycle is ensured.

In the utility model, the O-shaped sealing ring and the sealing gasket are limited inside by arranging the first groove position and the second groove position, so that displacement can not be generated due to movement between the valve cover and the valve body, and the durable sealing performance is ensured.

It should be noted that, the foregoing is only a preferred embodiment of the present utility model, and the present utility model is not limited to the foregoing embodiment, but it should be understood that although the present utility model has been described in detail with reference to the embodiment, it is possible for those skilled in the art to make modifications to the technical solutions described in the foregoing embodiment, or to make equivalent substitutions for some technical features thereof, but any modifications, equivalent substitutions, improvements and the like within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a ball valve for hydrogen seal, includes valve body and valve gap, is equipped with the valve rod in the valve body, its characterized in that, the valve gap is installed on the valve body, is formed with first contact plane and second contact plane between valve body and the valve gap, and first contact plane and second contact plane are different directions respectively and are arranged, are equipped with first trench in the first contact plane, are equipped with the second trench in the second contact plane, are equipped with O type sealing washer in the first trench, are equipped with sealed the pad in the second trench, O type sealing washer and sealed pad all with the corresponding internal surface laminating contact of valve gap.

2. The ball valve for hydrogen gas seal of claim 1 wherein said O-ring seal is fluororubber.

3. The ball valve for hydrogen gas seal of claim 2 wherein said gasket is a polymeric plastic.

4. A ball valve for hydrogen sealing according to claim 3, wherein the inner wall of the valve rod is provided with a retaining pad and a bearing in sequence from bottom to top, the valve rod is inserted from the bearing and the retaining pad, and the valve rod is tightly mounted with the valve body through the bearing and the retaining pad.

5. The ball valve for hydrogen sealing of claim 4 wherein said bearing is a non-metallic bearing.

6. The ball valve for hydrogen gas seal according to claim 5, wherein the inner wall of the valve body is further provided with a packing, the packing is fastened to the inner wall of the valve body by a packing pad and a pressing member, the packing pad is attached to the side wall of the valve rod, and the packing pad is arranged at the bottom of the packing.

7. The ball valve for hydrogen sealing according to claim 6, wherein the pressing member comprises a pressing plate, a pressing sleeve and a disc spring, the pressing plate is mounted on the valve body and fastened to the upper portion of the valve rod, the pressing sleeve is arranged at the upper end of the packing, and the disc spring presses the pressing sleeve and is connected with the inner wall of the valve body.

8. The ball valve for hydrogen sealing of claim 7 wherein said pressure plate is mounted in locking relation to the valve body by bolts.