CN210106346U - Underwater valve body cover stud protection sealing structure - Google Patents
Underwater valve body cover stud protection sealing structure Download PDFInfo
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- CN210106346U CN210106346U CN201920694324.8U CN201920694324U CN210106346U CN 210106346 U CN210106346 U CN 210106346U CN 201920694324 U CN201920694324 U CN 201920694324U CN 210106346 U CN210106346 U CN 210106346U
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- valve body
- stud
- sealing ring
- valve
- cover
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- 238000007789 sealing Methods 0.000 title claims abstract description 89
- 230000001681 protective effect Effects 0.000 claims abstract description 36
- 238000005260 corrosion Methods 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 230000007797 corrosion Effects 0.000 claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000013535 sea water Substances 0.000 abstract description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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- Valve Housings (AREA)
Abstract
The utility model relates to a stud protection sealing structure of an underwater valve body cover, which comprises a valve body, a valve cover, a bearing stud and a nut; the bearing stud is provided with an external outcrop on the nut; the outer outcrop of the pressure-bearing stud and the outer side of the nut are provided with a stud protective cap; the stud protective cap is provided with internal threads and is locked with external exposed threads; the stud protective cap is pressed on the valve cover; a first sealing ring is arranged between the valve body and the valve cover and positioned at one side of the pressure-bearing stud close to the outside of the valve body, and a second sealing ring is arranged at one side close to the inside of the valve body; and a metal sealing ring is also arranged on one side, close to the interior of the valve body, of the second sealing ring between the valve body and the valve cover. The utility model discloses an underwater valve body cover stud protective sealing structure, which effectively isolates a stud nut from seawater; the external pressure of the deepwater environment and the internal high pressure from the valve body are effectively borne; the problems of leakage of a valve body and a valve cover of the valve and corrosion of a connecting stud nut in a high-pressure underwater environment are solved.
Description
Technical Field
The utility model relates to a valve field especially relates to a valve body lid spiral shell post protection seal structure under water.
Background
The underwater valve is mainly applied to all valves of underwater pipelines and is mainly applied to the exploitation of offshore oil and natural gas. The underwater valve types mainly include ball valves, gate valves, check valves and the like. Compared with a land valve, the underwater environment is more complex, the valve needs to be in the environments of internal high pressure, external high pressure, cold and hot temperature alternation, seawater corrosion and microbial corrosion for a long time, the requirements on the sealing performance of the valve and the external leakage of the valve are more strict, in particular to a body cover connecting stud nut of the underwater valve.
The existing conventional valve body is connected with the valve cover through a stud and a nut, has a simple structure, does not have a sealing ring, and cannot bear the external pressure from underwater; in the conventional valve, one to two seals are generally designed for connecting a valve body and a valve cover, and the sealing performance and reliability cannot meet the requirements of the use working condition of the underwater valve; in the existing underwater valve, the connection of the valve body and the valve cover is not protected, only the exposed part is subjected to marine anticorrosive paint spraying protection, and seawater easily enters the internal threaded connection part from the assembly gap of the valve body and the valve cover to cause thread gap corrosion; the thread corrosion of the valve body and the valve cover pressure-bearing stud can reduce the capability of bearing the internal pressure, and the long-term corrosion can even cause the integrity damage of the pressure-bearing boundary.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an underwater valve body cover screw column protection sealing structure, which can effectively isolate a screw column nut from seawater by arranging a screw column protection cap; the first sealing ring can effectively bear the external pressure of the deepwater environment, and the second sealing ring and the metal sealing ring can effectively block the internal high pressure from the valve body; the problems of leakage of a valve body and a valve cover of the valve and corrosion of a connecting stud nut in a high-pressure underwater environment are solved.
The utility model provides a technical scheme that its technical problem adopted is: a kind of underwater valve body cover stud protects the hermetically-sealed construction, it includes valve block, valve bonnet, in order to be used for connecting valve block and bearing stud and nut of the valve bonnet; the pressure-bearing stud is provided with an external outcrop on the nut; a stud protective cap is arranged on the outer exposed end of the pressure-bearing stud and the outer side of the nut; the stud protective cap is provided with internal threads corresponding to the external outcrop, and the stud protective cap is locked with the external outcrop threads; the stud protective cap is pressed on the valve cover; a first sealing ring is arranged between the valve body and the valve cover and positioned at one side of the pressure-bearing stud close to the outside of the valve body, and a second sealing ring is arranged at one side close to the inside of the valve body; and a metal sealing ring is also arranged on one side, close to the interior of the valve body, of the second sealing ring between the valve body and the valve cover.
And a thread tool withdrawal groove is also arranged on the top side of the internal thread of the stud protective cap.
The stud protective cap is an anti-corrosion protective cap, and the outer side of the upper half part of the stud protective cap is provided with a hexagonal head or a square head.
A groove is formed in the bottom end face of the stud protective cap, and a third sealing ring is assembled in the groove.
The metal sealing ring is a corrosion-resistant alloy ring and realizes sealing through medium internal pressure in the valve body.
The first sealing ring and the second sealing ring are both arranged in a sealing ring groove arranged on the valve body; the sealing ring groove is a groove with an inclined surface, and the section of the sealing ring groove is trapezoidal.
And a corrosion-resistant alloy layer is welded on the inner surface of the seal ring groove in a overlaying mode.
And the valve body and the valve cover are respectively provided with a metal sealing ring groove at the position corresponding to the metal sealing ring.
The utility model has the advantages that: the utility model discloses a stud protection sealing structure of an underwater valve body cover, which can effectively isolate a stud nut from seawater by arranging a stud protection cap; the first sealing ring can effectively bear the external pressure of the deepwater environment, and the second sealing ring and the metal sealing ring can effectively block the internal high pressure from the valve body; the problems of leakage of a valve body and a valve cover of the valve and corrosion of a connecting stud nut in a high-pressure underwater environment are solved.
Drawings
Fig. 1 is a schematic view of a screw column protective sealing structure of an underwater valve body cover according to an embodiment.
Detailed Description
In order to deepen the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and embodiments, which are only used for explaining the present invention and are not limited to the protection scope of the present invention.
Examples
As shown in fig. 1, the embodiment provides a stud protection sealing structure of an underwater valve body cover, which comprises a valve body 1, a valve cover 2, a pressure-bearing stud 3 and a nut 4, wherein the pressure-bearing stud 3 and the nut are used for connecting the valve body 1 and the valve cover 2; the pressure-bearing stud 3 is provided with an external outcrop on the nut 4; a stud protective cap 5 is arranged on the outer exposed end of the pressure bearing stud 3 and the outer side of the nut 4; the stud protective cap 5 is provided with internal threads corresponding to the external outcrop, and the stud protective cap 5 is locked with the external outcrop threads; the stud protective cap 5 is pressed on the valve cover 2; a first sealing ring 7 is arranged between the valve body 1 and the valve cover 2 and on one side of the pressure-bearing stud 3 close to the outside of the valve body 1, and a second sealing ring 9 is arranged on one side close to the inside of the valve body 1; a metal sealing ring 8 is further arranged between the valve body 1 and the valve cover 2 and on one side of the second sealing ring 9 close to the interior of the valve body 1; the top side of the internal thread of the stud protective cap 5 is also provided with a thread tool withdrawal groove; the stud protective cap 5 is a corrosion-resistant protective cap, and the outer side of the upper half part of the stud protective cap is provided with a hexagonal head or a square head; a groove is formed in the bottom end face of the stud protective cap 5, and a third sealing ring 6 is assembled in the groove; the metal sealing ring 8 is a corrosion-resistant alloy ring and realizes sealing through the internal pressure of a medium in the valve body 1; the first sealing ring 7 and the second sealing ring 9 are both arranged in a sealing ring groove arranged on the valve body 1; the sealing ring groove is a groove with an inclined surface, and the section of the sealing ring groove is trapezoidal; the inner surface of the seal ring groove is welded with a corrosion-resistant alloy layer in a overlaying mode; and metal sealing ring grooves are respectively arranged at the positions of the valve body 1 and the valve cover 2 corresponding to the metal sealing rings 8.
In the underwater valve body cover screw column protection sealing structure, a screw thread and a screw thread tool withdrawal groove are arranged in a screw column protection cap, the head part of the screw column protection cap is a hexagonal head or a square head, and the bottom of the screw column protection cap is provided with a groove with an inclined surface; when the outcrop of the valve body valve cover stud is increased, the third sealing ring is assembled in a groove at the bottom of the stud protective cap, the hexagonal head or the square head at the upper part of the stud protective cap is screwed to the end face of the valve cover, seawater medium and external pressure are effectively isolated, and the external outcrop thread is protected from being corroded.
The underwater valve body cover stud protective sealing structure is provided with a first sealing ring and a second sealing ring, wherein the first sealing ring mainly blocks the pressure of seawater from the outside and prevents seawater from invading into the internal threaded connection from the joint surface of the valve body and the valve cover so as to corrode threads; the first sealing ring can block the pressure in the valve cavity and can also be used as an auxiliary seal for external pressure.
According to the underwater valve body cover stud protective sealing structure, the metal sealing ring is arranged to mainly block high pressure from the inside of the valve cavity; the metal sealing ring is made of nickel-based corrosion-resistant alloy, is compressed under the action of the valve body and the valve cover stud nut, and is sealed under medium internal pressure.
According to the underwater valve body cover stud protection sealing structure, the sealing ring groove is formed by surfacing Inconel, the thickness of the surfacing alloy is not less than 3mm, and sealing failure of the sealing ring caused by corrosion of valve cavity media or seawater media of the sealing ring groove body metal is prevented.
According to the underwater valve body cover stud protection sealing structure, the stud nut can be effectively isolated from seawater by arranging the stud protection cap; the first sealing ring can effectively bear the external pressure of the deepwater environment, and the second sealing ring and the metal sealing ring can effectively block the internal high pressure from the valve body; the problems of leakage of a valve body and a valve cover of the valve and corrosion of a connecting stud nut in a high-pressure underwater environment are solved.
The above-mentioned embodiments should not limit the present invention in any way, and all the technical solutions obtained by adopting equivalent replacement or equivalent conversion fall within the protection scope of the present invention.
Claims (8)
1. The utility model provides a valve body lid double-screw bolt protection seal structure under water which characterized in that: the valve comprises a valve body, a valve cover, a pressure-bearing stud and a nut, wherein the pressure-bearing stud and the nut are used for connecting the valve body and the valve cover; the pressure-bearing stud is provided with an external outcrop on the nut; a stud protective cap is arranged on the outer exposed end of the pressure-bearing stud and the outer side of the nut; the stud protective cap is provided with internal threads corresponding to the external outcrop, and the stud protective cap is locked with the external outcrop threads; the stud protective cap is pressed on the valve cover; a first sealing ring is arranged between the valve body and the valve cover and positioned at one side of the pressure-bearing stud close to the outside of the valve body, and a second sealing ring is arranged at one side close to the inside of the valve body; and a metal sealing ring is also arranged on one side, close to the interior of the valve body, of the second sealing ring between the valve body and the valve cover.
2. The underwater valve body cover stud protection sealing structure of claim 1, wherein: and a thread tool withdrawal groove is also arranged on the top side of the internal thread of the stud protective cap.
3. The underwater valve body cover stud protection sealing structure of claim 1, wherein: the stud protective cap is an anti-corrosion protective cap, and the outer side of the upper half part of the stud protective cap is provided with a hexagonal head or a square head.
4. The underwater valve body cover stud protection sealing structure of claim 1, wherein: a groove is formed in the bottom end face of the stud protective cap, and a third sealing ring is assembled in the groove.
5. The underwater valve body cover stud protection sealing structure of claim 1, wherein: the metal sealing ring is a corrosion-resistant alloy ring and realizes sealing through medium internal pressure in the valve body.
6. The underwater valve body cover stud protection sealing structure of claim 1, wherein: the first sealing ring and the second sealing ring are both arranged in a sealing ring groove arranged on the valve body; the sealing ring groove is a groove with an inclined surface, and the section of the sealing ring groove is trapezoidal.
7. The underwater valve body cover stud protection sealing structure of claim 6, wherein: and a corrosion-resistant alloy layer is welded on the inner surface of the seal ring groove in a overlaying mode.
8. The underwater valve body cover stud protection sealing structure of claim 1, wherein: and the valve body and the valve cover are respectively provided with a metal sealing ring groove at the position corresponding to the metal sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920694324.8U CN210106346U (en) | 2019-05-15 | 2019-05-15 | Underwater valve body cover stud protection sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920694324.8U CN210106346U (en) | 2019-05-15 | 2019-05-15 | Underwater valve body cover stud protection sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210106346U true CN210106346U (en) | 2020-02-21 |
Family
ID=69540586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920694324.8U Active CN210106346U (en) | 2019-05-15 | 2019-05-15 | Underwater valve body cover stud protection sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210106346U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043542A (en) * | 2019-05-15 | 2019-07-23 | 苏州道森阀门有限公司 | A kind of underwater valve body lid stud exclusion seal structure |
-
2019
- 2019-05-15 CN CN201920694324.8U patent/CN210106346U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110043542A (en) * | 2019-05-15 | 2019-07-23 | 苏州道森阀门有限公司 | A kind of underwater valve body lid stud exclusion seal structure |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215000 No.42, Guijia lane, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: Harbin Electric Suzhou Dauson Valve Co.,Ltd. Country or region after: China Address before: 215000 No.42, Guijia lane, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee before: SUZHOU DOUSON VALVE CO.,LTD. Country or region before: China |