CN217951341U - Gas pressure reducing valve - Google Patents
Gas pressure reducing valve Download PDFInfo
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- CN217951341U CN217951341U CN202222098222.4U CN202222098222U CN217951341U CN 217951341 U CN217951341 U CN 217951341U CN 202222098222 U CN202222098222 U CN 202222098222U CN 217951341 U CN217951341 U CN 217951341U
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Abstract
The utility model discloses a gas pressure reducing valve relates to relief pressure valve technical field to solve traditional only adopt the problem that the leakproofness of the hard sealed gas pressure reducing valve of metal can not have good assurance. The gas pressure reducing valve comprises a valve cover, a valve body, a metal diaphragm sealing assembly, a soft sealing gasket and a spring part, wherein a spring cavity is formed in the valve cover, and a concave cavity is formed at one end of the valve cover; one end of the valve body is arranged in the concave cavity of the valve cover in a protruding mode; the metal diaphragm sealing assembly is arranged between the valve cover and the valve body, the valve body and the metal diaphragm sealing assembly form a gas storage cavity, and the metal diaphragm sealing assembly is used for sealing the gas storage cavity; the soft sealing gasket is arranged between the metal diaphragm sealing assembly and the valve body and used for sealing the gas storage cavity; the first end butt of spring part is kept away from on the terminal surface of metal diaphragm seal assembly in the spring chamber, and the second end fixed connection of spring part is on the metal diaphragm seal assembly. The utility model provides a gas reducing valve is used for improving gas reducing valve's sealed effect.
Description
Technical Field
The utility model relates to a relief pressure valve technical field especially relates to a gas relief pressure valve.
Background
In the high-purity gas pipeline and the high-purity gas equipment, a gas pressure reducing valve is needed to be arranged, and the pressure of a gas source is reduced and stabilized to a fixed value through the gas pressure reducing valve so as to obtain stable gas source power.
The sealing performance of the high-purity gas pressure reducing valve can directly influence the working stability of a high-purity gas pipeline and high-purity gas equipment, and at present, the valve seal of the high-purity gas pressure reducing valve is generally hard seal, mainly a metal-to-metal sealing mode.
Under the condition of only adopting metal hard sealing, because the elasticity of the metal sealing is mostly poor, the reliable vacuum sealing can be ensured only by a large sealing force, and the requirements on the roughness and the matching precision of the metal sealing element are high, and fine scars can damage the sealing; therefore, the sealing performance of the conventional high-purity gas pressure reducing valve only using metal hard seal cannot be well guaranteed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a gas relief pressure valve for improve gas relief pressure valve's sealed effect.
In order to achieve the above object, the present invention provides the following technical solutions:
the utility model provides a gas pressure reducing valve, gas pressure reducing valve includes:
the spring cover is arranged in the valve cover, and a concave cavity is formed in one end of the valve cover;
one end of the valve body is arranged in the concave cavity of the valve cover in a protruding mode;
the metal diaphragm sealing assembly is arranged between the valve cover and the valve body, a gas storage cavity is formed by the valve body and the metal diaphragm sealing assembly, and the metal diaphragm sealing assembly is used for sealing the gas storage cavity;
the soft sealing gasket is arranged between the metal membrane sealing assembly and the valve body and used for sealing the gas storage cavity;
spring part, spring part set up in the spring intracavity, and on the first end butt of spring part kept away from metal diaphragm seal assembly's terminal surface in the spring chamber, the second end fixed connection of spring part was on metal diaphragm seal assembly, and the length of spring part when being in natural state was greater than the height in spring chamber.
Based on this, in the utility model discloses in, the one end protrusion of valve body sets up in the cavity of valve gap, metal diaphragm seal assembly sets up between valve body and valve gap, valve body and metal diaphragm seal assembly are formed with the gas storage chamber, separate gas storage chamber and spring chamber through metal diaphragm seal assembly, because the length of spring part when in the natural state is greater than the height in spring chamber, so after installing to gas relief pressure valve, the spring part is in compression state, exert the power from spring chamber to gas storage chamber to metal diaphragm seal assembly, make metal diaphragm seal assembly butt in the valve body, play sealed effect to the gas storage chamber; in addition, the soft sealing gasket sets up between metal diaphragm seal assembly and the valve body, and the power transmission from spring chamber to gas storage chamber that metal diaphragm seal assembly received is to the soft sealing gasket, produces certain deformation after the soft sealing gasket atress, makes the tight butt of soft sealing gasket and metal diaphragm seal assembly, and the tight butt of soft sealing gasket and valve body is also, further guarantees the leakproofness in gas storage chamber. Based on this, carry out first sealing to the gas storage chamber through the metal diaphragm seal assembly who sets up between valve gap and valve body, carry out the second through the soft sealing pad that sets up between metal diaphragm seal assembly and valve body and say sealedly to the gas storage chamber, when the fine scar appears on metal diaphragm seal assembly and the not high or metal diaphragm seal assembly of valve body cooperation precision, guarantee metal diaphragm seal assembly and valve body all with the inseparable butt of soft sealing pad with the valve body through the deformation of soft sealing pad, improve the leakproofness in gas storage chamber.
Optionally, in the above-mentioned gas pressure reducing valve, a groove is provided on an end surface of one end of the valve body close to the valve cover, and the groove is used for sealing the gas storage cavity by matching with the soft sealing gasket after the soft sealing gasket is stressed.
Optionally, in the above-mentioned gas pressure reducing valve, the material of the soft seal is polytetrafluoroethylene or polytetrafluoroethylene.
Optionally, in the above-mentioned gas pressure reducing valve, the outer diameter of the metal diaphragm seal assembly and the outer diameter of the soft seal gasket are both equal to the outer diameter of the protruding end surface of the valve body.
Optionally, in the above gas pressure reducing valve, the gas pressure reducing valve further includes:
and the spring gasket is arranged between the spring piece and the valve cover.
Optionally, in the above-mentioned gas pressure reducing valve, the gas pressure reducing valve further includes a spring adjusting mechanism, the spring adjusting mechanism includes a handle and a push rod, one end of the valve cover, which is far away from the valve body, is provided with a threaded hole, one end of the push rod passes through the threaded hole and abuts against the spring gasket, the push rod is in threaded connection with the valve cover, the other end of the push rod is fixedly connected with the handle, and the handle is used for driving the push rod to make telescopic motion in the spring cavity.
Optionally, in the above gas pressure reducing valve, the metal diaphragm seal assembly includes:
the metal diaphragm is arranged between the valve cover and the soft sealing gasket;
the membrane head sets up on the terminal surface that the metal diaphragm is close to the valve gap, and the first end and the spring part butt of membrane head.
Optionally, in the above gas pressure reducing valve, the valve body further includes:
the first end of the air inlet channel is communicated with an air inlet of the valve body;
the valve core cavity is communicated with the second end of the air inlet channel and the air storage cavity;
and the first end of the air outlet channel is communicated with the air storage cavity, and the second end of the air outlet channel is communicated with the air outlet of the valve body.
Optionally, in the above gas pressure reducing valve, the gas pressure reducing valve further includes:
and the valve core is arranged in the valve core cavity and used for adjusting the opening of the gas entering the gas storage cavity.
Optionally, in the above gas pressure reducing valve, the valve body includes:
the valve seat is arranged in the valve core cavity and is provided with a first through hole;
the valve core sealing gasket is arranged on one side of the valve seat, and a second through hole is formed in the valve core sealing gasket;
the first end of the valve needle sequentially penetrates through the second through hole and the first through hole and is close to the metal diaphragm sealing assembly, the diameter of the second end of the valve needle is larger than that of the second through hole, and the second end of the valve needle is abutted to the valve core sealing gasket;
and one end of the supporting spring is fixedly connected with the valve needle, and one end of the supporting spring is abutted to the valve body.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
fig. 1 is a cross-sectional view of a gas pressure reducing valve according to an embodiment of the present invention;
fig. 2 is an enlarged view of a gas pressure reducing valve provided in an embodiment of the present invention at a position a.
Reference numerals are as follows:
1-valve cover; 2-a valve body; 21-a groove; 22-an intake passage; 23-a spool cavity; 24-an air outlet channel; 3-a metal diaphragm seal assembly; 31-a metal diaphragm; 32-a membrane head; 4-a soft seal gasket; 5-a spring cavity; 6-a gas storage cavity; 7-a spring element; 8-a spring washer; 9-a spring adjustment mechanism; 91-a handle; 92-a top rod; 10-a valve core; 101-a valve seat; 102-a cartridge gasket; 103-a valve needle; 104-support springs.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to 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.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
At present, the valve seal of the high-purity gas pressure reducing valve usually adopts hard seal, mainly adopts a metal-to-metal sealing mode, but only adopts the metal hard seal condition, because the elasticity of the metal seal is mostly poor, the reliable vacuum seal can be ensured by very large sealing force, and the requirements of the roughness and the matching precision of the metal seal are very high, and fine scars can damage the seal; therefore, the sealing performance of the high purity gas pressure reducing valve using only the metal hard seal cannot be well ensured.
In order to solve the above problems, as shown in fig. 1 and fig. 2, an embodiment of the present invention provides a gas pressure reducing valve, which includes a valve cap 1, a valve body 2, a metal diaphragm sealing assembly 3, a soft sealing gasket 4, and a spring element 7, wherein a spring cavity 5 is formed in the valve cap 1, and a cavity is formed at one end of the valve cap 1; one end of the valve body 2 is arranged in the concave cavity of the valve cover 1 in a protruding mode; the metal diaphragm sealing assembly 3 is arranged between the valve cover 1 and the valve body 2, the valve body 2 and the metal diaphragm sealing assembly 3 form a gas storage cavity 6, and the metal diaphragm sealing assembly 3 is used for sealing the gas storage cavity 6; the soft sealing gasket 4 is arranged between the metal membrane sealing component 3 and the valve body 2 and is used for sealing the gas storage cavity 6; spring part 7 sets up in spring chamber 5, and on the first end butt of spring part 7 kept away from metal diaphragm seal assembly 3 in spring chamber 5's terminal surface, the second end fixed connection of spring part 7 was on metal diaphragm seal assembly 3, and the length of spring part 7 when being in natural state was greater than the height in spring chamber 5.
In the specific working process, one end of the valve body 2 is arranged in the concave cavity of the valve cover 1 in a protruding mode, the metal diaphragm sealing assembly 3 is arranged between the valve body 2 and the valve cover 1, the gas storage cavity 6 is formed between the valve body 2 and the metal diaphragm sealing assembly 3, the gas storage cavity 6 is separated from the spring cavity 5 through the metal diaphragm sealing assembly 3, and the length of the spring piece 7 in a natural state is larger than the height of the spring cavity 5, so that the spring piece 7 is in a compression state after being installed in the gas pressure reducing valve, force from the spring cavity 5 to the gas storage cavity 6 is applied to the metal diaphragm sealing assembly 3, the metal diaphragm sealing assembly 3 is abutted against the valve body 2, and the gas storage cavity 6 is sealed; in addition, soft sealing pad 4 sets up between metal diaphragm seal assembly 3 and valve body 2, and the power transmission from spring chamber 5 to gas storage chamber 6 that metal diaphragm seal assembly 3 received is to soft sealing pad 4, produces certain deformation behind the 4 atresss of soft sealing pad, makes soft sealing pad 4 and the inseparable butt of metal diaphragm seal assembly 3, and soft sealing pad 4 also inseparable butt with valve body 2 further guarantees the leakproofness in gas storage chamber 6.
Based on this, the utility model discloses in, carry out first sealing to gas storage chamber 6 through the metal diaphragm seal assembly 3 that sets up between valve gap 1 and valve body 2, carry out the second through the soft sealing pad 4 that sets up between metal diaphragm seal assembly 3 and valve body 2 and seal to gas storage chamber 6, when metal diaphragm seal assembly 3 and valve body 2 cooperation precision is not high or the tiny scar appears on the metal diaphragm seal assembly 3, guarantee metal diaphragm seal assembly 3 and valve body 2 all with the inseparable butt of soft sealing pad 4 and valve body 2 through the deformation of soft sealing pad 4, improve the leakproofness of gas storage chamber 6.
In some embodiments, as shown in fig. 2, in the above-mentioned gas pressure reducing valve, a groove 21 is provided on an end surface of the valve body 2 near one end of the valve cap 1, for example, a V-shaped groove or a U-shaped groove is provided on an end surface of the valve body 2 near one end of the valve cap 1, and the groove 21 is used for sealing the gas storage chamber 6 in cooperation with the soft gasket 4 after the soft gasket 4 is stressed. Increase recess 21 on valve body 2, can increase the quantity of sealed point, will original monoblock sealed face, divide into two sealed faces to improve sealed effect.
Further, in the above-described gas pressure reducing valve, the end surface of the valve body 2 near one end of the bonnet 1 is provided with a plurality of grooves 21, and the number of the grooves 21 is, for example, 2 or 3. So set up, can further increase the quantity of sealed point, improve sealed effect.
Specifically, in the above-described gas pressure reducing valve, the material of the soft seal 4 is polytetrafluoroethylene or polytetrafluoroethylene. The polytetrafluoroethylene and the polytetrafluoroethylene have good corrosion resistance, and the stability of the soft sealing gasket 4 in the working process can be ensured.
In some embodiments, in the above-described gas pressure reducing valve, the outer diameter of the metal diaphragm seal assembly 3 and the outer diameter of the soft seal 4 are both equal to the outer diameter of the protruding end surface of the valve body 2. So set up, guarantee that metal diaphragm seal assembly 3 and soft sealing pad 4 can set up between valve body 2 and valve gap 1, metal diaphragm seal assembly 3 and soft sealing pad 4 are great with valve body 2's area of contact moreover, improve sealed reliability.
In some possible technical solutions, in the above-mentioned gas pressure reducing valve, the gas pressure reducing valve further includes a spring washer 8, and the spring washer 8 is disposed between the spring member 7 and the valve cover 1. So set up, spring part 7 passes through spring shim 8 butt on valve gap 1, increases butt stability.
In some embodiments, in the above-mentioned gas pressure reducing valve, the gas pressure reducing valve further includes a spring adjusting mechanism 9, the spring adjusting mechanism 9 includes a handle 91 and a push rod 92, one end of the valve cover 1, which is away from the valve body 2, is provided with a threaded hole, one end of the push rod 92 passes through the threaded hole and abuts against the spring gasket 8, the push rod 92 is in threaded connection with the valve cover 1, the other end of the push rod 92 is fixedly connected with the handle 91, and the handle 91 is used for driving the push rod 92 to make telescopic motion in the spring cavity 5. The handle 91 drives the push rod 92 to extend and retract in the spring cavity 5 through rotation, and the acting force of the spring on the metal diaphragm sealing assembly 3 is adjusted through the push rod 92.
Specifically, in the above-mentioned gas pressure reducing valve, the metal diaphragm sealing assembly 3 includes the metal diaphragm 31 and the diaphragm head 32, and the metal diaphragm 31 is disposed between the valve cover 1 and the soft sealing gasket 4; the film head 32 is arranged on the end face of the metal film 31 close to the valve cover 1, and the first end of the film head 32 is abutted against the spring piece 7. The membrane head 32 sets up on metal diaphragm 31, spring part 7 and membrane head 32 fixed connection, when adjusting the flexible of spring part 7 through spring adjustment mechanism 9, guarantee that spring part 7 is more stable to metal diaphragm 31's effort.
Further, in the above gas pressure reducing valve, the valve body 2 further includes an air inlet channel 22, a valve core cavity 23 and an air outlet channel 24, and a first end of the air inlet channel 22 is communicated with an air inlet of the valve body 2; the valve core cavity 23 is communicated with the second end of the air inlet channel 22, and the valve core cavity 23 is communicated with the air storage cavity 6; the first end of the air outlet channel 24 is communicated with the air storage cavity 6, and the second end of the air outlet channel 24 is communicated with the air outlet of the valve body 2. So set up, high-pressure gas can get into gas storage chamber 6 through inlet channel 22 and case cavity 23, and rethread air outlet channel 24 flows out gas storage chamber 6.
Specifically, in the above gas pressure reducing valve, the gas pressure reducing valve further includes a valve core 10, and the valve core 10 is disposed in the valve core cavity 23 and is used for adjusting the opening degree of the gas entering the gas storage cavity 6. So set up, adjust the aperture that gaseous entering gas storage chamber 6 through case 10, and then adjust high-pressure gas's flow, and then accomplish gaseous decompression.
Specifically, in the above-mentioned gas pressure reducing valve, the valve element 10 includes a valve seat 101, a valve element gasket 102, a valve needle 103 and a supporting spring 104, the valve seat 101 is disposed in the valve element cavity 23, and the valve seat 101 is provided with a first through hole; the valve core sealing gasket 102 is arranged on one side of the valve seat 101, and a second through hole is formed in the valve core sealing gasket 102; the first end of the valve needle 103 sequentially penetrates through the second through hole and the first through hole and is close to the metal diaphragm sealing component 3, the diameter of the second end of the valve needle 103 is larger than that of the second through hole, and the second end of the valve needle 103 is abutted to the valve core sealing gasket 102; one end of the supporting spring 104 is fixedly connected with the valve needle, and one end of the supporting spring 104 is abutted against the valve body. The second end of the valve needle 103 abuts against the valve core gasket 102, abuts against the valve needle 103 after the membrane head 32 is deformed under stress, and transmits the force to the valve needle 103, so that the gap between the valve needle 103 and the valve core gasket 102 is changed, the opening degree of the gas entering the gas storage cavity 6 is adjusted, and the valve needle 103 is supported by the supporting spring 104 to prevent the valve needle 103 from falling off.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A gas pressure reducing valve, comprising:
the spring valve comprises a valve cover, a spring cavity and a spring seat, wherein a concave cavity is formed in the valve cover;
one end of the valve body is arranged in the concave cavity of the valve cover in a protruding mode;
the metal diaphragm sealing assembly is arranged between the valve cover and the valve body, a gas storage cavity is formed between the valve body and the metal diaphragm sealing assembly, and the metal diaphragm sealing assembly is used for sealing the gas storage cavity;
the soft sealing gasket is arranged between the metal diaphragm sealing assembly and the valve body and used for sealing the gas storage cavity;
the spring part, the spring part set up in the spring intracavity, the first end butt of spring part in the spring intracavity is kept away from on the terminal surface of metal diaphragm seal assembly, the second end fixed connection of spring part in on the metal diaphragm seal assembly, just length when the spring part is in natural state is greater than the height in spring intracavity.
2. The gas pressure reducing valve according to claim 1, wherein a groove is formed in an end face of one end, close to the valve cover, of the valve body, and the groove is used for being matched with the soft sealing gasket to seal the gas storage cavity after the soft sealing gasket is stressed.
3. The gas pressure reducing valve according to claim 1, wherein the material of the soft gasket is polytetrafluoroethylene or polytetrafluoroethylene.
4. The gas pressure reducing valve according to claim 1, wherein an outer diameter of the metal diaphragm seal assembly and an outer diameter of the soft seal are both equal to an outer diameter of the protruding end surface of the valve body.
5. The gas pressure reducing valve of claim 4, further comprising:
a spring washer disposed between the spring and the valve cover.
6. The gas pressure reducing valve of claim 5, further comprising:
spring adjustment mechanism, spring adjustment mechanism includes handle and ejector pin, the valve gap is kept away from one of valve body is served and is equipped with the screw hole, the one end of ejector pin is passed screw hole and butt in spring gasket, just the ejector pin with valve gap threaded connection, the other end of ejector pin with handle fixed connection, the handle is used for driving the ejector pin is in telescopic motion is to the spring intracavity.
7. The gas pressure reducing valve of claim 4, wherein the metal diaphragm seal assembly comprises:
the metal diaphragm is arranged between the valve cover and the soft sealing gasket;
the membrane head, the membrane head set up in the metal diaphragm is close to on the terminal surface of valve gap, just the first end of membrane head with the spring part butt.
8. The gas pressure reducing valve of claim 1, wherein the valve body further comprises:
the first end of the air inlet channel is communicated with the air inlet of the valve body;
the valve core cavity is communicated with the second end of the air inlet channel and the air storage cavity;
and the first end of the air outlet channel is communicated with the air storage cavity, and the second end of the air outlet channel is communicated with the air outlet of the valve body.
9. The gas pressure reducing valve of claim 8, further comprising:
and the valve core is arranged in the valve core cavity and used for adjusting the opening degree of the gas entering the gas storage cavity.
10. The gas pressure reducing valve according to claim 9, wherein the spool includes:
the valve seat is arranged in the valve core cavity and is provided with a first through hole;
the valve core sealing gasket is arranged on one side of the valve seat, and a second through hole is formed in the valve core sealing gasket;
the first end of the valve needle sequentially penetrates through the second through hole and the first through hole and is close to the metal diaphragm sealing assembly, the diameter of the second end of the valve needle is larger than that of the second through hole, and the second end of the valve needle is abutted to the valve core sealing gasket;
and one end of the supporting spring is fixedly connected with the valve needle, and one end of the supporting spring is abutted to the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222098222.4U CN217951341U (en) | 2022-08-10 | 2022-08-10 | Gas pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222098222.4U CN217951341U (en) | 2022-08-10 | 2022-08-10 | Gas pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217951341U true CN217951341U (en) | 2022-12-02 |
Family
ID=84226275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222098222.4U Active CN217951341U (en) | 2022-08-10 | 2022-08-10 | Gas pressure reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217951341U (en) |
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2022
- 2022-08-10 CN CN202222098222.4U patent/CN217951341U/en active Active
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