阅读说明：本技术 一种氢气用截止阀 (Stop valve for hydrogen ) 是由 马君 王君 陆嘉君 于 2019-09-24 设计创作，主要内容包括：本发明公开了一种氢气用截止阀,包括阀体；阀杆,阀杆下端外壁和阀体内壁贴合接触；截止件,截止件和阀体部分贴合；密封件,密封件内壁和阀杆外壁贴合密封,密封件外壁和阀体内壁贴合密封；固定件,固定件设置于密封件、阀体上方,固定件和阀体固定连接。本发明通过在阀体和阀杆之间设置密封件,将从阀体内部流过的介质密封在阀体内部,避免介质从阀体和阀杆之间的空隙外泄；本发明通过设置固定件,将密封件固定在阀体和阀杆间,避免密封件因车况振动而与阀杆或阀体发生相对移动,从而防止介质外泄；固定件将阀杆和阀体的相对位置固定,避免阀杆与阀体、密封件的贴合不当,造成介质外泄。(The invention discloses a stop valve for hydrogen, which comprises a valve body; the outer wall of the lower end of the valve rod is in contact with the inner wall of the valve body in a fitting manner; the stop piece is attached to the valve body part; the inner wall of the sealing element is in fit sealing with the outer wall of the valve rod, and the outer wall of the sealing element is in fit sealing with the inner wall of the valve body; the fixing piece is arranged above the sealing piece and the valve body and fixedly connected with the valve body. According to the invention, the sealing element is arranged between the valve body and the valve rod, so that the medium flowing through the valve body is sealed in the valve body, and the medium is prevented from leaking out of a gap between the valve body and the valve rod; according to the invention, the fixing piece is arranged to fix the sealing element between the valve body and the valve rod, so that the sealing element is prevented from moving relative to the valve rod or the valve body due to vehicle condition vibration, and thus, the medium is prevented from leaking; the fixing piece fixes the relative position of the valve rod and the valve body, and avoids medium leakage caused by improper fit of the valve rod, the valve body and the sealing element.)

1. A stop valve for hydrogen comprises

A valve body;

the valve rod is arranged in the middle of the valve body, and the outer wall of the lower end of the valve rod is in contact with the inner wall of the valve body in a fitting manner;

the stopping piece is connected with the lower end of the valve rod, the stopping piece is attached to the valve body part, and the stopping piece is used for stopping a medium;

The sealing element is arranged in the middle of the valve rod and at the upper end of the valve body, the inner wall of the sealing element is in fit sealing with the outer wall of the valve rod, and the outer wall of the sealing element is in fit sealing with the inner wall of the valve body;

The fixing piece, the fixing piece set up in the sealing member the valve body top, the valve rod passes perpendicularly the fixing piece middle part, the fixing piece with valve body fixed connection.

2. A stop valve for hydrogen gas as defined in claim 1, wherein said stop member comprises:

The sealing gasket is fixedly connected with the lower end of the valve rod;

The valve seat is arranged below the sealing gasket and connected with the valve body, and the sealing body and the valve seat form a sealing surface during contact and attachment.

3. A stop valve for hydrogen gas as defined in claim 1, wherein said fixing member comprises:

the compression piece is arranged above the sealing piece, and the inner wall of the lower end of the compression nut is fixedly connected with the outer wall of the valve body;

And the clamping nut is arranged at the lower end of the clamping nut, the inner wall of the clamping nut is connected with the outer wall of the valve body, and the clamping nut is used for clamping the clamping nut.

4. A shut-off valve for hydrogen gas as claimed in claim 1, wherein the sealing member comprises:

The elastic piece is arranged on the outer side of the valve rod, and the upper end of the elastic piece is connected with the fixing piece in a matching way;

The first sealing part is arranged below the elastic part, the inner wall of the first sealing part is in fit sealing with the outer wall of the valve rod, and the outer wall of the first sealing part is in fit sealing with the valve body;

And the second sealing part is arranged under the first sealing part, and the lower end of the second sealing part is connected with the convex block on the inner wall of the middle part of the valve body in a matched manner.

5. A stop valve for hydrogen gas according to claim 4, wherein the first seal portion includes:

The pressing sleeve is arranged between the valve rod and the valve body and below the elastic piece;

The first sealing ring is arranged at the joint of the pressing sleeve and the valve rod;

and the second sealing ring is arranged at the joint of the pressing sleeve and the valve body.

6. a stop valve for hydrogen gas according to claim 4, wherein the second seal portion comprises:

the packing group is arranged right below the first sealing part, the inner wall of the packing group is attached to the outer wall of the valve rod, and the outer wall of the packing group is attached to the inner wall of the valve body;

The gasket is arranged below the whole packing set, and the lower part of the gasket is matched and connected with the convex block on the inner wall of the middle part of the valve body.

7. A shut-off valve for hydrogen gas as claimed in claim 6, wherein said packing set is a polymer material.

8. A hydrogen stop valve as defined in claim 1, wherein a handle is provided at the upper end of said valve stem, a screw is provided on said handle, and said handle is connected to said valve stem via said screw.

9. A stop valve for hydrogen gas as claimed in claim 1, wherein the valve body has a screw hole at a lower end thereof, the screw hole being located at a position deviated from the center line.

Technical Field

the invention relates to the field of hydrogen equipment, in particular to a stop valve for hydrogen.

Background

The hydrogen energy is regarded as an important secondary energy in the twenty-first century, has the advantages of rich resources, high combustion value, cleanness, renewability and the like, and along with the rapid development of fuel cell and battery automobile technologies, a safe and efficient hydrogen control technology becomes the key of hydrogen energy application. As a kind of forced sealing type valve, a cut-off valve is also used in a large amount in the field of hydrogen gas as a switch of a distribution pipeline, and thus the cut-off valve is an extremely important component in a hydrogen supply system.

At present, a stop valve specially designed for hydrogen is not developed, the stop valve and hydrogen medium in the prior art are not reliable in sealing, and the stop valve is applied to hydrogen storage equipment on a fuel cell vehicle, so that the vehicle-mounted stop valve is easy to vibrate under the influence of vehicle conditions in the working process, the sealing performance of the stop valve is reduced, the hydrogen is stopped and leaked, and explosion accidents are easily caused. Therefore, the development of a stop valve with good sealing performance specially used for hydrogen is a technical problem which needs to be solved urgently.

Disclosure of Invention

The invention aims to provide a stop valve for hydrogen, which aims to solve the technical problem that the stop valve in the prior art is poor in sealing performance and easy to leak.

in order to achieve the purpose, the invention adopts the following technical scheme:

A stop valve for hydrogen comprises a valve body; the valve rod is arranged in the middle of the valve body, and the outer wall of the lower end of the valve rod is in contact with the inner wall of the valve body in a fitting manner; the stopping piece is connected with the lower end of the valve rod, the stopping piece is attached to the valve body part, and the stopping piece is used for stopping a medium; the sealing element is arranged in the middle of the valve rod and at the upper end of the valve body, the inner wall of the sealing element is in fit sealing with the outer wall of the valve rod, and the outer wall of the sealing element is in fit sealing with the inner wall of the valve body; the fixing piece, the fixing piece set up in the sealing member the valve body top, the valve rod passes perpendicularly the fixing piece middle part, the fixing piece with valve body fixed connection.

In the embodiment, the medium is cut off by the cut-off piece, and the valve rod controls the switch of the cut-off piece, so that the cut-off or the circulation of the medium is realized; according to the invention, the sealing element is arranged between the valve body and the valve rod, so that the medium flowing through the valve body is sealed in the valve body, and the medium is prevented from leaking out of a gap between the valve body and the valve rod; according to the invention, the sealing element is fixed between the valve body and the valve rod by arranging the fixing element, so that the sealing element is prevented from moving relative to the valve rod or the valve body due to vehicle condition vibration, and thus, a medium is prevented from leaking; meanwhile, the fixing piece fixes the relative position of the valve rod and the valve body, and medium leakage caused by improper fit of the valve rod, the valve body and the sealing element is avoided.

Preferably, the shut-off member comprises: the sealing gasket is fixedly connected with the lower end of the valve rod; the valve seat is arranged below the sealing gasket and connected with the valve body, and the sealing body and the valve seat form a sealing surface during contact and attachment. According to the invention, the sealing gasket is fixedly connected with the lower end of the valve rod, so that the movement of the sealing gasket is controlled by the valve rod, and when the sealing gasket is contacted with the valve seat under the control of the valve rod, the sealing gasket and the valve seat form a sealing surface at the joint part, so that a medium cannot pass through the cut-off piece, and the cut-off of the medium is realized.

Preferably, the fixing member includes: the compression nut is arranged above the sealing element, the inner wall of the lower end of the compression nut is fixedly connected with the outer wall of the valve body, and the compression nut is used for fixing the relative positions of the valve body and the valve rod and fixing the sealing element between the valve body and the valve rod; and the clamping nut is arranged at the lower end of the clamping nut, the inner wall of the clamping nut is connected with the outer wall of the valve body, and the clamping nut is used for clamping the clamping nut. According to the invention, the compression nut and the clamping nut are arranged to fix the valve rod and the sealing element at corresponding positions, so that the change of relative positions of the valve rod and the sealing element due to vibration during vehicle condition vibration is avoided, and the sealing property of the stop valve is ensured. After the compression nut and the tightening nut are screwed, the friction force between nut teeth and bolt teeth is increased by the axial force generated between the nuts, so that the nuts are prevented from being automatically loosened, the stable fixing performance of the fixing piece and the valve body is enhanced, and the relative positions of the valve rod and the sealing piece are ensured to be stable.

Preferably, the seal comprises: the elastic piece is arranged on the outer side of the valve rod, and the upper end of the elastic piece is connected with the fixing piece in a matching way; the first sealing part is arranged below the elastic part, the inner wall of the first sealing part is in fit sealing with the outer wall of the valve rod, and the outer wall of the first sealing part is in fit sealing with the valve body; and the second sealing part is arranged under the first sealing part, and the lower end of the second sealing part is connected with the convex block on the inner wall of the middle part of the valve body in a matched manner. According to the invention, the lower end of the elastic piece is connected with the first sealing part, the first sealing part is connected with the second sealing part, the elastic force generated by the elastic piece is used for enhancing the sealing force on the first sealing part and the second sealing part, and the lower end of the second sealing part is always closely attached to the valve body; the upper end of the elastic piece is matched and connected with the fixing piece, and the sealing piece forms soft sealing on the valve body to enhance the sealing property of the valve body; the elastic piece can be compressed or rebounded and is suitable for a vibrating vehicle condition, when the first sealing part and the second sealing part are stressed and changed due to vehicle condition vibration, the elastic piece can quickly respond, and generates corresponding compensation force for the first sealing part and the second sealing part, so that the position of the sealing piece is always kept fixed, and the sealing performance of the sealing piece is guaranteed.

More preferably, the first sealing portion includes: the pressing sleeve is arranged between the valve rod and the valve body and below the elastic piece; the first sealing ring is arranged at the joint of the pressing sleeve and the valve rod; and the second sealing ring is arranged at the joint of the pressing sleeve and the valve body. According to the invention, the first sealing ring is arranged at the joint of the pressing sleeve and the valve rod, and the second sealing ring is arranged at the joint of the pressing sleeve and the valve body, so that the valve body and the valve rod are sealed at the first sealing part. According to the invention, the pressing sleeve is arranged, the upper end of the pressing sleeve is connected with the elastic piece, and the elastic piece exerts elastic force on the pressing sleeve to enable the pressing sleeve to tightly press the second sealing part, so that the sealing property of the second sealing part is enhanced.

More preferably, the second sealing portion includes: the packing group is arranged right below the first sealing part, the inner wall of the packing group is attached to the outer wall of the valve rod, and the outer wall of the packing group is attached to the inner wall of the valve body; the gasket is arranged below the whole packing set, and the lower part of the gasket is matched and connected with the convex block on the inner wall of the middle part of the valve body. According to the invention, the packing set is arranged to seal a medium, the contact area of the bottom of the packing set is increased by arranging the gasket, the lower end of the packing set is stably supported, the upper end of the packing set is connected with the first sealing part, the first sealing part is connected with the elastic member, and the elasticity of the elastic member is transmitted to the packing set through the first sealing part, so that the sealing performance of the packing set is enhanced.

More preferably, the filler group is a polymeric material.

preferably, a handle is arranged at the upper end of the valve rod, a screw is arranged on the handle, and the handle is connected with the valve rod through the screw.

Preferably, the valve body lower extreme is equipped with the screw hole, the position deviation central line in screw hole place.

Has the advantages that:

According to the invention, the fixing piece is arranged, the sealing element is fixed between the valve body and the valve rod, and the relative positions of the valve rod and the valve body are fixed, so that the relative positions of the valve rod, the valve body and the sealing element are prevented from changing when the vehicle condition vibrates, and a gap is generated between the sealing element and the valve rod as well as between the sealing element and the valve body to cause medium leakage. The fixing piece comprises a compression nut and a clamping nut, wherein the compression nut fixes the sealing element, the valve rod and the valve body, and the clamping nut fixes the compression nut, so that the fixing piece is still stably fixed under the vibration vehicle condition, and the sealing property of the stop valve is ensured.

According to the invention, the sealing element is arranged and comprises the elastic element, so that the sealing element is in soft sealing with the valve body and the valve rod, and the sealing property is improved. The first sealing part seals the valve body and the valve rod from the inner side and the outer side respectively; the second sealing part comprises a packing group and a gasket, and the gasket increases the supporting area of the bottom of the packing group; when the vehicle condition vibrates, the internal stress of the sealing element changes, the elastic force of the elastic element changes, corresponding elastic force is generated on the first sealing portion, the elastic force is transmitted to the second sealing portion, the positions of the packing group and the first sealing portion are always kept unchanged under the support of the gasket, the first sealing portion, the packing group, the valve rod and the valve body are always kept in tight fit sealing, and the effective sealing of the sealing element on the valve body and the valve rod is realized.

Drawings

the invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic sectional view of a hydrogen shut-off valve according to the present invention.

In the attached drawings

1. handle 2, valve rod 3, gland nut

4. Pressing sleeve 5, first sealing ring 6 and second sealing ring

7. packing group 8, washer 9 and fastening nut

10. Valve body 11, cutting ferrule nut 12, first cutting ferrule

13. Second ferrule 14, screw 15, elastic member

16. Sealing gasket

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clear and fully described, embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

for the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. But it is obvious. To one of ordinary skill in the art, the embodiments may be practiced without limitation to these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.

As shown in fig. 1, a shutoff valve for hydrogen gas includes a valve body 10; the valve rod 2 is arranged in the middle of the valve body 10, and the outer wall of the lower end of the valve rod 2 is in contact with the inner wall of the valve body 10 in a fitting manner; the stopping piece is connected with the lower end of the valve rod 2, is partially attached to the valve body 10 and is used for stopping a medium; the sealing element is arranged in the middle of the valve rod 2 and at the upper end of the valve body 10, the inner wall of the sealing element is in fit sealing with the outer wall of the valve rod 2, and the outer wall of the sealing element is in fit sealing with the inner wall of the valve body 10; the mounting, the mounting sets up in sealing member, valve body 10 top, and the valve rod 2 passes the mounting middle part perpendicularly, mounting and valve body 10 fixed connection. According to the invention, the medium is cut off through the cut-off piece, and the valve rod 2 is used for controlling the cut-off piece to be opened and closed, so that the cut-off or circulation of the medium is realized; according to the invention, the sealing element is arranged between the valve body 10 and the valve rod 2, so that the medium flowing through the valve body 10 is sealed in the valve body 10, and the medium is prevented from leaking out of a gap between the valve body 10 and the valve rod 2; according to the invention, the fixing piece is arranged to fix the sealing element between the valve body 10 and the valve rod 2, so that the sealing element is prevented from moving relative to the valve rod 2 or the valve body 10 due to vehicle condition vibration, and thus, the medium is prevented from leaking; meanwhile, the fixing piece fixes the relative positions of the valve rod 2 and the valve body 10, and medium leakage caused by improper fit of the valve rod 2, the valve body 10 and a sealing element is avoided.

As shown in fig. 1, the shut-off member includes: the sealing gasket 16 is fixedly connected with the lower end of the valve rod 2; and the valve seat is arranged below the sealing gasket 16 and connected with the valve body 10, and a sealing surface is formed when the sealing body is in contact joint with the valve seat. According to the invention, the sealing gasket 16 is fixedly connected with the lower end of the valve rod 2, so that the movement of the sealing gasket 16 is controlled by the valve rod 2, and when the sealing gasket 16 is contacted with the valve seat under the control of the valve rod 2, the sealing gasket 16 and the valve seat form a sealing surface at the joint part, so that a medium cannot pass through the cut-off piece, and the cut-off of the medium is realized.

As shown in fig. 1, the fixing member includes: the compression nut 3 is arranged above the sealing element, the inner wall of the lower end of the compression nut 3 is fixedly connected with the outer wall of the valve body 10, and the compression nut 3 is used for fixing the relative positions of the valve body 10 and the valve rod 2 and fixing the sealing element between the valve body 10 and the valve rod 2; and lock nut 9, and lock nut 9 sets up in lock nut 3 lower extreme, and lock nut 9 inner wall and the connection of valve body 10 outer wall, and lock nut 9 is used for and sticiss lock nut 3. According to the invention, the valve rod 2 and the sealing element are fixed at corresponding positions by arranging the compression nut 3 and the clamping nut 9, so that the change of the relative positions of the valve rod 2 and the sealing element due to vibration during vehicle condition vibration is avoided, and the sealing property of the stop valve is ensured. After the compression nut 3 and the clamping nut 9 are screwed, the friction force between nut teeth and bolt teeth is increased by the axial force generated between the nuts, so that the nuts are prevented from being automatically loosened, the stable fixing performance of the fixing piece and the valve body 10 is enhanced, and the relative positions of the valve rod 2 and the sealing piece are ensured to be stable.

As shown in fig. 1, the sealing member includes: the elastic piece 15, the elastic piece 15 is set up in the outside of valve stem 2, the upper end of the elastic piece 15 cooperates with gland nut 3 to connect; the first sealing part is arranged below the elastic piece 15, the inner wall of the first sealing part is in fit sealing with the outer wall of the valve rod 2, and the outer wall of the first sealing part is in fit sealing with the valve body 10; and the lower end of the second sealing part is connected with a convex block on the inner wall of the middle part of the valve body 10 in a matched manner. According to the invention, the lower end of the elastic piece 15 is connected with the first sealing part, the first sealing part is connected with the second sealing part, the elastic force generated by the elastic piece 15 is used for enhancing the sealing force on the first sealing part and the second sealing part, and the lower end of the second sealing part is always closely attached to the valve body 10; the upper end of the elastic piece 15 is matched and connected with the compression nut 3, and the sealing piece forms soft sealing on the valve body 10 to enhance the sealing property of the valve body 10; the elastic member 15 can be compressed or rebounded, and is suitable for a vibrating vehicle condition, when the first sealing portion and the second sealing portion are stressed and changed due to vehicle condition vibration, the elastic member 15 can quickly respond, and generate corresponding compensation force for the first sealing portion and the sealing portion, so that the position of the sealing member is always kept fixed, and the sealing performance of the sealing member is ensured.

In this embodiment, the elastic member 15 is a disc spring, the internal space of the stop valve of the present invention is limited, and the displacement generated when the valve rod 2 is opened or closed is small, so the deformation stroke of the elastic member 15 in the stop valve is very limited. Meanwhile, the size and the number of the disc springs can be selected according to the size of the valve and the pressure of the medium, so that different requirements can be met.

As shown in fig. 1, the first sealing portion includes: the pressing sleeve 4 is arranged between the valve rod 2 and the valve body 10 and below the elastic piece 15; the first sealing ring 5 is arranged at the joint of the pressing sleeve 4 and the valve rod 2; and the second sealing ring 6 is arranged at the joint of the pressing sleeve 4 and the valve body 10. According to the invention, the first sealing ring 5 is arranged at the joint of the pressing sleeve 4 and the valve rod 2, and the second sealing ring 6 is arranged at the joint of the pressing sleeve 4 and the valve body 10, so that the sealing of the valve body 10 and the valve rod 2 at the first sealing part is realized. According to the invention, the pressing sleeve 4 is arranged, the upper end of the pressing sleeve 4 is connected with the elastic piece 15, and the elastic piece 15 exerts elastic force on the pressing sleeve 4 to enable the pressing sleeve 4 to tightly press the second sealing part, so that the sealing property of the second sealing part is enhanced.

as shown in fig. 1, the second sealing portion includes: the packing set 7 is arranged right below the pressing sleeve 4, the inner wall of the packing set 7 is attached to the outer wall of the valve rod 2, and the outer wall of the packing set 7 is attached to the inner wall of the valve body 10; and the gasket 8 is arranged below the packing group 7, and the lower part of the gasket 8 is matched and connected with a convex block on the inner wall of the middle part of the valve body 10. According to the invention, the packing set 7 is arranged to seal a medium, the gasket 8 is arranged to increase the contact area of the bottom of the packing set 7, the lower end of the packing set 7 is stably supported, the upper end of the packing set 7 is connected with the pressing sleeve 4, the first sealing part is connected with the elastic part 15, and the elasticity of the elastic part 15 is transmitted to the packing set 7 through the pressing sleeve 4, so that the sealing performance of the packing set 7 is enhanced.

the filler group 7 is made of high polymer material. In this embodiment, the packing group 7 and the sealing pad 16 are both made of fluorine material, specifically polytetrafluoroethylene; polytetrafluoroethylene has good high temperature resistance, corrosion resistance, weatherability, polytetrafluoroethylene's coefficient of friction is extremely low simultaneously, when the stop valve is opened and close, need control sealed 16 and the laminating and the separation of disk seat through valve rod 2, valve rod 2 and packing group 7, sealed 16 and disk seat inevitably can take place relative movement, because sealed 16 and packing group 7 all adopt polytetrafluoroethylene macromolecular material, coefficient of friction is low, when standing in opening and close of stop valve, it is little to sealed 16 and the wearing and tearing of packing group 7, make sealed 16 and disk seat, packing group 7 and valve rod 2 keep furthest's laminating, thereby guarantee the leakproofness of stop valve. When the vehicle condition vibrates, the absolute relative stillness between the sealing gasket 16 and the valve seat and between the packing group 7 and the valve rod 2 cannot be kept, and slight relative movement is inevitable, at the moment, because the joint degree between the sealing gasket 16 and the valve seat and between the packing group 7 and the valve rod 2 is always high, the sealing gasket 16 and the valve seat, and between the packing group 7 and the valve rod 2 can always keep sealing. And at high pressure, the packing group 7 and the sealing gasket 16 are made of high molecular material polyimide.

As shown in fig. 1, valve rod 2 upper end is equipped with handle 1, is equipped with screw 14 on the handle 1, and handle 1 passes through screw 14 and valve rod 2 and connects, and concrete screw 14 is hexagonal socket head cap holding screw 14, through the rotatable valve rod 2 of turning handle 1 to make valve rod 2 drive sealed 16 of filling up and reciprocate, realize sealed laminating and the separation of 16 and the disk seat of filling up, thereby realize opening and close of stop valve. The lower extreme of valve body 10 is equipped with the screw hole, and the position deviation central line at screw hole place, screw hole are used for installing the stop valve. The left end of the valve body 10 is provided with a clamping sleeve set which comprises a clamping sleeve nut 11, a first clamping sleeve 12 and a second clamping sleeve 13, and the connecting mode of the clamping sleeve set can be changed according to requirements.

although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.