CN110792858B - Sealing device - Google Patents
Sealing device Download PDFInfo
- Publication number
- CN110792858B CN110792858B CN201911162334.8A CN201911162334A CN110792858B CN 110792858 B CN110792858 B CN 110792858B CN 201911162334 A CN201911162334 A CN 201911162334A CN 110792858 B CN110792858 B CN 110792858B
- Authority
- CN
- China
- Prior art keywords
- ring body
- sealing
- flange
- groove
- annular groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 title claims abstract description 90
- 238000012856 packing Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 abstract description 11
- 230000003068 static effect Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a sealing device, which comprises a first flange, a second flange and a sealing gasket, wherein the sealing gasket comprises a supporting ring, the supporting ring is provided with an inner ring body, a middle ring body and an outer ring body which are sequentially connected from inside to outside along the radial direction, two side shaft end parts of the middle ring body are axially protruded from the inner ring body and the outer ring body, sealing rings are arranged on the two side shaft end parts of the middle ring body, and at least one side shaft end part of the supporting ring is provided with an inner side annular groove and an outer side annular groove to form a deformation release groove. When the flanges on two sides of the sealing gasket are different in radial displacement due to different working temperature fields, the deformation displacement difference can be automatically compensated, so that the sealing rings on two sides and the corresponding flanges are kept synchronously moving and contacted relatively static forever by the sealing surfaces, the sealing surfaces are not rubbed with each other to damage the sealing rings, and the sealing is ensured to be continuously effective.
Description
Technical Field
The invention relates to the field of sealing, in particular to a sealing device.
Background
In fields such as nuclear power, petrochemical industry, food, etc., traditional flange seal mainly adopts two conical ring pads, octagonal (oval) pad, metal ring pad or metal winding gasket etc. because sealing connection flange both sides temperature is different, the asynchronous deformation takes place for sealing member both sides flange under different temperatures, and the flange sealing face produces the relative displacement difference in radial direction, has to cause the risk that sealing member damage or sealing stress decline and lead to sealing failure.
Disclosure of Invention
The invention aims to provide a sealing device which is used for ensuring that the sealing reliability is always kept when the relative displacement difference of the flange sealing surface in the radial direction is generated.
In order to achieve the above purpose, the invention adopts the following technical scheme: the sealing device comprises a first flange with a first flange surface, a second flange with a second flange surface, and a sealing gasket for sealing connection between the first flange surface and the second flange surface, wherein a first mounting groove is arranged on the first flange, a second mounting groove is arranged on the second flange, the sealing gasket comprises a supporting ring, the supporting ring is provided with an inner ring body, a middle ring body and an outer ring body which are sequentially connected from inside to outside along the radial direction, the inner ring body and the outer ring body are supported between the first flange surface and the second flange surface,
The two side shaft end parts of the middle ring body are axially protruded from the inner ring body and the outer ring body, sealing rings are respectively arranged on the two side shaft end parts of the middle ring body, the two side shaft end parts of the middle ring body are respectively correspondingly arranged in the first mounting groove and the second mounting groove in a matched manner, at least one side shaft end part of the supporting ring is provided with an inner side annular groove and an outer side annular groove, the inner side annular groove is positioned on the inner ring body, the outer side annular groove is positioned on the outer ring body, and the middle ring body is radially connected with the inner side annular groove and the outer side annular groove.
Preferably, the working temperature of the second flange is higher than that of the first flange, and the inner annular groove and the outer annular groove are arranged on the end part of the shaft, which is connected with the second flange, on the support ring.
Preferably, the inner ring body, the middle ring body and the outer ring body are integrally arranged.
Preferably, the inner annular groove and the outer annular groove on the same shaft end of the support ring have the same groove width and groove depth.
Preferably, the two side shaft end parts of the supporting ring are respectively provided with the inner annular groove and the outer annular groove.
Preferably, annular sealing ring mounting grooves are formed in the two side shaft end parts of the middle ring body, and the sealing rings are cooperatively arranged in the sealing ring mounting grooves.
Further, a face seal or a wire seal is formed between the seal ring and the groove bottom wall of the first mounting groove/the second mounting groove.
As a specific embodiment, the sealing ring is an O-ring or a packing ring.
Preferably, the part of the middle ring body protruding from the inner ring body and the outer ring body is provided with a connecting part and a mounting part, wherein the connecting part and the mounting part are connected in the axial direction, the radial thickness of the mounting part is larger than that of the connecting part, and the mounting part is matched with the first mounting groove/the second mounting groove.
Further, the inner circumferential surface of the mounting part is an arc surface which is arched inwards along the radial direction, the outer circumferential surface of the mounting part is an arc surface which is arched outwards along the radial direction, and the arc surface is in contact with the circumferential groove wall of the first mounting groove/the second mounting groove.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: when the sealing device works, when the flanges on the two sides of the sealing gasket generate radial displacement difference due to different working temperature fields, the deformation displacement difference can be automatically compensated, so that the sealing rings on the two sides and the corresponding flange are always kept to synchronously move and relatively still in contact by the sealing surfaces, the sealing surfaces are not rubbed with each other to damage the sealing rings, and the sealing is ensured to be continuously and effectively.
Drawings
FIG. 1 is a schematic longitudinal section of a gasket seal used in example 1 of the present invention;
FIG. 2 is a schematic longitudinal cross-sectional view of a sealing device employing the sealing gasket of FIG. 1, wherein the sealing gasket has not been compressed;
FIG. 3 is a schematic longitudinal cross-sectional view of the sealing device of FIG. 2 after compression and without radial displacement of the gasket;
FIG. 4 is a schematic longitudinal cross-sectional view of the sealing gasket of FIG. 3 after radial displacement;
FIG. 5 is a schematic longitudinal section of a gasket seal used in example 2 of the present invention;
FIG. 6 is a schematic longitudinal section of a gasket seal used in example 3 of the present invention;
Wherein: 100. a first flange; 101. a first flange surface; 102. a first mounting groove;
200. A second flange; 201. a second flange surface; 202. a second mounting groove;
300. A sealing gasket; 10. a support ring; 1. an inner ring body; 2. a middle ring body; 21. a connection part; 22. a mounting part; 3. an outer ring body; 4. an inner annular groove; 5. an outer annular groove; 6. a seal ring installation groove; 20. an O-ring; 30. and a packing ring.
Detailed Description
The technical scheme of the invention is further described below with reference to the attached drawings and specific embodiments.
Example 1
Referring to fig. 1, the sealing gasket includes a supporting ring 10, the supporting ring 10 includes an inner ring body 1, an intermediate ring body 2 and an outer ring body 3 sequentially connected from inside to outside along a radial direction, the inner ring body 1, the intermediate ring body 2 and the outer ring body 3 are integrally formed into a whole supporting ring 10, and the supporting ring 10 may be made of metal or nonmetal materials, such as stainless steel, PTFE, etc. The two side shaft end parts of the middle ring body 2 are axially protruded from the inner ring body 1 and the outer ring body 3, and sealing rings are respectively arranged on the two side shaft end parts of the middle ring body 2, specifically, annular sealing ring mounting grooves 6 are respectively arranged on the two side shaft end parts of the middle ring body 2, the sealing rings are cooperatively arranged in the sealing ring mounting grooves 6, and the sealing rings can be made of metal or nonmetal, specifically, can be an O-shaped ring 20 adopted in the embodiment, and can also be a metal ring or a sealing packing ring.
At least one side shaft end of the supporting ring 10 is provided with an inner annular groove 4 and an outer annular groove 5, the inner annular groove 4 is provided on the inner ring body 1, the outer annular groove 5 is provided on the outer ring body 3, the middle ring body 2 is connected with the inner annular groove 4 and the outer annular groove 5 along the radial direction, that is, the inner peripheral wall of the middle ring body 2 forms one side groove wall of the inner annular groove 4, and the outer peripheral wall of the middle ring body 2 forms one side groove wall of the outer annular groove 5.
In this embodiment, the two side shaft end portions of the supporting ring 10 are provided with an inner annular groove 4 and an outer annular groove 5, the same shaft end portion of the supporting ring 10 has the same groove width and groove depth of the inner annular groove 4 and the outer annular groove 5, and the preferred design is that the two side shaft end portions of the outer ring body 3 have the same groove depth, groove width and position of the two outer annular grooves 5 in the radial direction of the outer ring body 3; the groove depth, the groove width and the positions of the two inner annular grooves 4 on the two side shaft ends of the inner ring body 1 in the radial direction of the inner ring body 1 are the same.
In this embodiment, the thickness of the inner ring body 1 is the same as that of the outer ring body 3, and the heights of the shaft ends of the two sides of the middle ring body 2 protruding from the inner ring body 1/the outer ring body 3 are the same. The part of the middle ring body 2 protruding from the inner ring body 1 and the outer ring body 3 is provided with a connecting part 21 connected in the axial direction and a mounting part 22 for mounting the sealing ring, wherein the radial thickness of the mounting part 22 is larger than that of the connecting part 21, and preferably, the mounting part 22 adopts a ball-shaped design, specifically, the inner circumferential surface of the mounting part 22 is an arc surface of an inward radial arch, and the outer circumferential surface of the mounting part 22 is an arc surface of an outward radial arch. Of course, in other embodiments, the mounting portion 22 may be provided in a square or other shaped configuration.
Referring to fig. 2 and 3, the sealing device includes a first flange 100 having a first flange surface 101, a second flange 200 having a second flange surface 201, and a sealing gasket 300 for sealing connection between the first flange surface 101 and the second flange surface 201, wherein the first flange 100 is provided with a first mounting groove 102, and the second flange 200 is provided with a second mounting groove 202.
The first flange 100, the second flange 200 and the gasket 300 are coaxially disposed. The first flange 100 and the second flange 200 are axially pressed and connected through bolts, the sealing gasket 300 is pressed between the first flange 100 and the second flange 200, the inner ring body 1 and the outer ring body 3 of the sealing gasket 300 are supported between the first flange surface 101 and the second flange surface 201, the shaft ends of the two sides of the middle ring body 2 are respectively correspondingly and cooperatively arranged in the first mounting groove 102 and the second mounting groove 202, the mounting part 22 of the middle ring body 2 is mutually matched with the first mounting groove 102/the second mounting groove 202, and specifically, the inner peripheral wall and the outer peripheral wall of the mounting part 22 are respectively contacted with the circumferential groove walls of the first mounting groove 102/the second mounting groove 202 in an arc surface manner. The O-ring 20 on the shaft end of the intermediate ring body 2 forms a linear seal with the groove bottom walls of the first and second mounting grooves 102, 202. The inner annular groove 4 and the outer annular groove 5 communicate with the first mounting groove 102/the second mounting groove 202.
Referring to fig. 4, when the sealing device is operated under the high-temperature use condition, if the temperature field of the side of the second flange 200 is higher than the temperature field of the side of the first flange 100, then: when the sealing ring works, the compression amount of the sealing ring can be limited because the inner ring body 1 and the outer ring body 3 are in contact with and supported by the first flange 100 and the second flange 200, so that the sealing stress of the sealing ring is constant; when the flanges on the two sides of the sealing gasket 300 are asynchronous due to the temperature field, the first mounting groove 102 and the second mounting groove 202 on the two sides of the sealing gasket 300 move in the radial asynchronous direction, and the displacement difference between the second mounting groove 202 on the second flange 200 on the high temperature side and the first mounting groove 102 on the first flange 100 on the low temperature side is shown as a in fig. 3, at this time, due to the deformation release grooves formed by the inner annular groove 4 and the outer annular groove 5, the part of the middle ring body 2 protruding into the first mounting groove 102 and the second mounting groove 202 (namely, the two axial end parts of the middle ring body 2) can deflect and deform in the radial direction, so that the deflection displacement difference is compensated by automatically following the deflection of the first mounting groove 102 and the second mounting groove 202 in the radial direction, and the sealing rings on the two sides and the corresponding flange are kept synchronously moving and contacting and relatively stationary forever, so that the sealing rings cannot be rubbed with each other to damage the sealing rings, thereby achieving the purpose of ensuring that the sealing rings are continuously effective.
In the sealing gasket, the specific thickness of the connecting portion 21 should be according to the material of the sealing gasket and combined with the actual working condition, so that when the relative radial displacement difference occurs between the first flange 100 and the second flange 200 in the use process, the connecting portion 21 can be bent and deformed along the radial direction, so that the mounting portion 22 can swing outwards along the radial direction and follow the first mounting groove 102 and the second mounting groove 202 to swing along the radial direction.
Example 2
Referring to the gasket shown in fig. 5, the gasket is mainly different from the gasket of embodiment 1 in that an inner annular groove 4 and an outer annular groove 5 are provided on one of the side shaft ends of the support ring 10. When the gasket is installed in the sealing device, the shaft ends provided with the inner annular groove 4 and the outer annular groove 5 are connected to the flange having a high operating temperature, that is, to the second flange 200 having a high operating temperature field.
Example 3
Referring to the gasket shown in fig. 6, the main difference between the gasket and the gasket of embodiment 1 is that the packing ring 30 is used as the seal ring, and when the gasket is disposed in the sealing device, the packing ring 30 forms a face seal with the groove bottom walls of the first mounting groove 102 and the second mounting groove 202.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (9)
1. A sealing device comprising a first flange having a first flange face, a second flange having a second flange face, and a gasket for sealing connection between the first flange face and the second flange face, characterized in that: the first flange is provided with a first mounting groove, the second flange is provided with a second mounting groove, the sealing gasket comprises a supporting ring, the supporting ring is provided with an inner ring body, a middle ring body and an outer ring body which are sequentially connected from inside to outside along the radial direction, the inner ring body and the outer ring body are supported between the first flange surface and the second flange surface,
The two side shaft end parts of the middle ring body are axially protruded from the inner ring body and the outer ring body, sealing rings are respectively arranged on the two side shaft end parts of the middle ring body, the two side shaft end parts of the middle ring body are respectively correspondingly arranged in the first mounting groove and the second mounting groove in a matched mode, an inner side annular groove and an outer side annular groove are formed in at least one side shaft end part of the supporting ring, the inner side annular groove is located on the inner ring body, the outer side annular groove is located on the outer ring body, the middle ring body is radially connected with the inner side annular groove and the outer side annular groove, the working temperature of the second flange is higher than that of the first flange, and the inner side annular groove and the outer side annular groove are arranged on the shaft end part of the supporting ring connected with the second flange.
2. The sealing device of claim 1, wherein: the inner ring body, the middle ring body and the outer ring body are integrally arranged.
3. The sealing device of claim 1, wherein: the inner annular groove and the outer annular groove on the same shaft end of the support ring have the same groove width and groove depth.
4. The sealing device of claim 1, wherein: the two side shaft end parts of the supporting ring are respectively provided with the inner annular groove and the outer annular groove.
5. The sealing device of claim 1, wherein: annular sealing ring mounting grooves are formed in the end parts of the two side shafts of the middle ring body, and the sealing rings are arranged in the sealing ring mounting grooves in a matched mode.
6. The sealing device of claim 5, wherein: the sealing ring and the groove bottom wall of the first mounting groove/the second mounting groove form a face seal or a line seal.
7. The sealing device of claim 6, wherein: the sealing ring is an O-shaped ring or a packing ring.
8. The sealing device of claim 1, wherein: the part of the middle ring body protruding from the inner ring body and the outer ring body is provided with a connecting part and a mounting part, wherein the connecting part and the mounting part are connected along the axial direction, the radial thickness of the mounting part is larger than that of the connecting part, and the mounting part is matched with the first mounting groove/the second mounting groove.
9. The sealing device of claim 8, wherein: the inner peripheral surface of the mounting part is an arc surface which is arched inwards along the radial direction, the outer peripheral surface of the mounting part is an arc surface which is arched outwards along the radial direction, and the arc surface is contacted with the circumferential groove wall of the first mounting groove/the second mounting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911162334.8A CN110792858B (en) | 2019-11-25 | 2019-11-25 | Sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911162334.8A CN110792858B (en) | 2019-11-25 | 2019-11-25 | Sealing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110792858A CN110792858A (en) | 2020-02-14 |
| CN110792858B true CN110792858B (en) | 2024-05-28 |
Family
ID=69445892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911162334.8A Active CN110792858B (en) | 2019-11-25 | 2019-11-25 | Sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110792858B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1141254A1 (en) * | 1984-01-26 | 1985-02-23 | Всесоюзный Дважды Ордена Трудового Красного Знамени Теплотехнический Научно-Исследовательский Институт Им.Ф.Э.Дзержинского | Metal sealing gasket for flanged joint |
| DE8914198U1 (en) * | 1989-12-01 | 1990-01-11 | Deutsches Elektronen Synchrotron Desy, 2000 Hamburg | Indium seal for small flanges and Pneurop flanges |
| EP0922897A2 (en) * | 1997-12-12 | 1999-06-16 | IBK Wiesehahn GmbH | Sealing arrangement for flanges and pipe connections |
| DE202011100506U1 (en) * | 2010-06-21 | 2011-07-13 | Alfred Jung | Seal for flange connection |
| WO2014094700A1 (en) * | 2012-12-19 | 2014-06-26 | P. J. Schulz Gmbh | Static seal |
| JP3194843U (en) * | 2014-09-30 | 2014-12-11 | サニー工業株式会社 | Packing for connecting pipe members |
| CN204828655U (en) * | 2015-07-17 | 2015-12-02 | 滨州双峰石墨密封材料有限公司 | Multistage sealed graphite gaskets |
| CN210890512U (en) * | 2019-11-25 | 2020-06-30 | 苏州宝骅密封科技股份有限公司 | Sealing device |
-
2019
- 2019-11-25 CN CN201911162334.8A patent/CN110792858B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1141254A1 (en) * | 1984-01-26 | 1985-02-23 | Всесоюзный Дважды Ордена Трудового Красного Знамени Теплотехнический Научно-Исследовательский Институт Им.Ф.Э.Дзержинского | Metal sealing gasket for flanged joint |
| DE8914198U1 (en) * | 1989-12-01 | 1990-01-11 | Deutsches Elektronen Synchrotron Desy, 2000 Hamburg | Indium seal for small flanges and Pneurop flanges |
| EP0922897A2 (en) * | 1997-12-12 | 1999-06-16 | IBK Wiesehahn GmbH | Sealing arrangement for flanges and pipe connections |
| DE202011100506U1 (en) * | 2010-06-21 | 2011-07-13 | Alfred Jung | Seal for flange connection |
| WO2014094700A1 (en) * | 2012-12-19 | 2014-06-26 | P. J. Schulz Gmbh | Static seal |
| JP3194843U (en) * | 2014-09-30 | 2014-12-11 | サニー工業株式会社 | Packing for connecting pipe members |
| CN204828655U (en) * | 2015-07-17 | 2015-12-02 | 滨州双峰石墨密封材料有限公司 | Multistage sealed graphite gaskets |
| CN210890512U (en) * | 2019-11-25 | 2020-06-30 | 苏州宝骅密封科技股份有限公司 | Sealing device |
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| Publication number | Publication date |
|---|---|
| CN110792858A (en) | 2020-02-14 |
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