CN210687227U

CN210687227U - Valve joint and valve connected with same

Info

Publication number: CN210687227U
Application number: CN201921278031.8U
Authority: CN
Inventors: 李宏伟; 李平; 褚兰东
Original assignee: Wujiang Messer Industrial Gas Co Ltd
Current assignee: Wujiang Messer Industrial Gas Co Ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-06-05
Anticipated expiration: 2029-08-08

Abstract

The utility model relates to a valve joint, including connecting the body, the one end of joint body form the valve link, the other end forms the pipeline link, the inside route that runs through both ends that forms of joint body, the shape of valve link and the shape phase-match of valve interface, the outer peripheral face of valve link on seted up the circle groove, circle inslot cover be equipped with the sealing washer. A valve, the valve be connected with the valve connect. The utility model overcomes the problem that the joint connection valve leak test failure rate is high has guaranteed valve linkage effect, makes the leakage rate greatly reduced, realizes better sealed effect, has improved the work efficiency of connection.

Description

Valve joint and valve connected with same

Technical Field

The utility model relates to a valve joint and connect valve that this valve connects.

Background

Most of the cylinder valves used in the semiconductor industry use CGA (american compressed gas association) standard valves. The CGA makes a very detailed list of valves suitable for various gases, the CGA580 valve being a standard valve dedicated to inert gases such as nitrogen, argon, helium, etc.

Although the valve has the advantages of compact structure, low leakage rate, strong anti-misloading capability and the like, the valve has a very serious weakness: the requirement on connection operation is high, and the failure rate of joint connection leakage test is high. The reason for this is mainly the sealing between the valve outlet and the connector.

The sealing between the valve outlet and the standard connector is realized by the spherical surfaces which are contacted with each other (as shown in figure 3), the pressing nut 50 presses the connector 5 and the valve 4, and the male spherical surface and the female spherical surface are tightly adhered and compacted to realize sealing. If the two spherical surfaces are not matched too much or the joint and the valve outlet are slightly non-coaxial, leakage can be caused, no matter how the two spherical surfaces are pressed by a wrench, a satisfactory sealing effect can not be realized, and the automatic pressure maintaining and leakage detecting program of the gas holder can not be passed frequently. The complaint rate of CGA580 valve connection failure at the customer is very high. The steel cylinder is returned and then checked, and the valve and the joint have no problem and are only caused by irregular operation.

To address this problem well, some companies have devised a polytetrafluoroethylene gasket between the valve outlet and the fitting. The sealing problem seems to be solved, however, the gasket stuck in the valve door after being pressed and deformed is difficult to take out, the gasket is picked out by sharp-pointed hard objects, the sealing spherical surface of the valve is very easy to damage, scratches are left, and the valve is completely scrapped.

In summary, the connection of the conventional CGA580 valve to the standard connector has the following problems:

1. the hard sealing mode between the CGA580 valve and the joint is unreliable, the operation requirement is strict, and the leakage rate is high;

2. the CGA580 valve is connected with the joint and the gasket, and the gasket after extrusion deformation cannot be taken out;

3. the connection of the CGA580 valve requires a large torque to be applied with a wrench to seal.

Disclosure of Invention

An object of the utility model is to provide a valve joint.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides a valve joint, includes the joint body, the one end of joint body form the valve link end, the other end forms the pipeline link end, the inside route that runs through both ends that forms of joint body, the shape of valve link end and the shape phase-match of valve interface, the outer peripheral face of valve link end on seted up the circle groove, circle inslot cover be equipped with the sealing washer.

Preferably, the valve connector further comprises a first connecting part sleeved on the connector body and used for being connected with the valve interface.

Further preferably, an outer circumferential surface of the first connecting portion is provided with an external thread.

Further preferably, the diameter of the valve connecting end is larger than that of the joint body, a step surface is formed between the valve connecting end and the joint body, and the first connecting portion can abut against the step surface.

Preferably, the valve joint further comprises an operating part sleeved on the joint body, and the operating part is located on one side of the first connecting part close to the pipeline connecting end and can abut against the operating part.

Further preferably, the operating portion is provided integrally with the first connecting portion,

more preferably, the operating portion is a hand wheel.

Preferably, the matching surface of the valve connecting end is a spherical surface.

Another object of the utility model is to provide a connect valve of this valve joint.

a valve, the valve be connected with the valve connect.

Preferably, the valve comprises a valve interface, the valve interface comprises a joint connecting end and a second connecting part, the shape of the joint connecting end is matched with that of the valve connecting end, the valve connecting end and the sealing ring are abutted against the joint connecting end, and the valve joint is fastened with the valve interface through the first connecting part and the second connecting part.

Preferably, the valve is a CGA580 valve.

Further preferably, the inner surface of the second connecting portion is provided with an internal thread.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model overcomes the problem that the joint connection valve leak test failure rate is high has guaranteed valve linkage effect, makes the leakage rate greatly reduced, realizes better sealed effect, has improved the work efficiency of connection.

Drawings

FIG. 1 is a schematic view of a valve fitting of the present embodiment;

FIG. 2 is a schematic diagram of the valve and the valve connector in this embodiment;

fig. 3 is a schematic diagram of a valve and a valve connector in the prior art.

Wherein: 1. a connector body; 10. a valve connecting end; 11. a pipeline connecting end; 12. a passage; 13. a first connection portion; 14. an operation section; 2. an O-shaped sealing ring; 3. a valve interface; 30. a joint connection end; 31. a second connecting portion; 4. a valve; 5; a valve joint; 50. and (5) pressing the nut.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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.

The valve joint shown in fig. 1 comprises a joint body 1, wherein one end of the joint body 1 forms a valve connecting end 10, the other end of the joint body 1 forms a pipeline connecting end 11, a passage 12 penetrating through the two ends is formed inside the joint body 1, the shape of the valve connecting end 10 is matched with that of a valve port, and the matching surface of the valve connecting end 10 is a spherical surface. In this embodiment:

the outer peripheral surface of the valve connecting end 10 is provided with a ring groove 11, and an O-shaped sealing ring 2 is sleeved in the ring groove 11.

The valve joint further comprises a first connecting portion 13 which is sleeved on the joint body 1 and is used for being connected with the valve interface, and external threads are arranged on the outer peripheral surface of the first connecting portion 13. The diameter of valve link end 10 is greater than the diameter of connecting body 1 for form the step face between valve link end 10 and the connecting body 1, first connecting portion 13 can support on the step face.

The valve joint further comprises an operation part 14 sleeved on the joint body 1, the operation part 14 is located at one side of the first connecting part 13 close to the pipeline connecting end 11, and can be abutted against the operation part 14, in this embodiment: the operation portion 14 is a hand wheel, and is provided integrally with the first connection portion 13.

A valve, specifically CGA580 valve, the valve includes valve interface 3, and valve interface 3 includes and connects link 30, second connecting portion 31, connects the shape phase-match of link 30 and valve link 10, and the fitting surface that connects link 30 also is the sphere promptly. The parts of the CGA580 valve which are not described are all the prior art, do not relate to any invention point, and are not described in detail.

The operation is as follows;

the O-shaped sealing ring 2 is sleeved in the ring groove 11 of the valve connecting end 10, inserted into the valve port 3 of the CGA580 valve and screwed into the hand wheel of the operation part 14, so that the first connecting part 13 and the second connecting part 31 are screwed tightly through threads, the valve connecting end 10 and the sealing ring 2 are abutted against the connector connecting end 30 of the valve, and therefore complete connection can be achieved, sealing is reliable, and the valve connecting end 10 and the sealing ring are shown in figure 2.

The utility model has the advantages that the problem that the joint and the valve are coaxial is not needed to be particularly noticed during connection, and the O-shaped sealing ring 2 can compensate micro displacement caused by the non-coaxial joint in a certain range; the hand wheel is screwed manually to realize sealing, a spanner is not needed to apply large torque, convenience and rapidness are realized, and the working efficiency is improved.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a valve joint, includes the joint body, the one end of joint body form the valve link end, the other end forms the pipe connection end, the inside route that runs through both ends that forms of joint body, the shape phase-match of shape and valve interface of valve link end, its characterized in that: the valve is characterized in that a ring groove is formed in the outer peripheral surface of the valve connecting end, and a sealing ring is sleeved in the ring groove.

2. The valve fitting of claim 1, wherein: the valve joint further comprises a first connecting part which is sleeved on the joint body and is used for being connected with the valve interface.

3. The valve fitting of claim 2, wherein: and the outer peripheral surface of the first connecting part is provided with an external thread.

4. The valve fitting of claim 2, wherein: the diameter of valve link end be greater than the diameter of joint body, the valve link end with the joint body between form the step face, first connecting portion can support the step face on.

5. The valve fitting of claim 2, wherein: the valve joint further comprises an operation part sleeved on the joint body, wherein the operation part is positioned at one side of the first connecting part close to the pipeline connecting end and can be abutted against the operation part.

6. The valve fitting of claim 5, wherein: the operation part and the first connecting part are integrally arranged.

7. The valve fitting of claim 5, wherein: the operation part is a hand wheel.

8. The valve fitting of claim 1, wherein: the matching surface of the valve connecting end is a spherical surface.

9. A valve, characterized by: the valve is connected with the valve joint of any one of claims 1 to 8.

10. The valve of claim 9, wherein: the valve comprises a valve interface, the valve interface comprises a joint connecting end and a second connecting part, the shape of the joint connecting end is matched with that of the valve connecting end, the valve connecting end and the sealing ring are tightly abutted with the joint connecting end, and the valve joint is fastened with the valve interface through the first connecting part and the second connecting part.