CN112524365A - Combined sealing gasket suitable for various working conditions - Google Patents
Combined sealing gasket suitable for various working conditions Download PDFInfo
- Publication number
- CN112524365A CN112524365A CN202011499732.1A CN202011499732A CN112524365A CN 112524365 A CN112524365 A CN 112524365A CN 202011499732 A CN202011499732 A CN 202011499732A CN 112524365 A CN112524365 A CN 112524365A
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- CN
- China
- Prior art keywords
- thickness
- inner ring
- sealing gasket
- gasket
- working conditions
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 56
- 239000002184 metal Substances 0.000 claims abstract description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 18
- 229910002804 graphite Inorganic materials 0.000 claims description 14
- 239000010439 graphite Substances 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000005056 compaction Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
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
-
- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
- F16J15/122—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally parallel to the surfaces
Abstract
The invention discloses a combined sealing gasket suitable for various working conditions, which sequentially consists of an inner ring, a deformable sealing gasket, a metal pad and an outer ring from inside to outside, wherein the thickness H2 of the deformable sealing gasket is greater than the thickness H1 of the inner ring and the thickness H3 of the metal pad, and the thickness H3 of the metal pad is greater than the thickness H4 of the outer ring and the thickness H1 of the inner ring. The combined sealing gasket is suitable for environments with fluctuating working temperature or pressure, has smaller gasket width under the condition of the same pretightening force, can reduce the diameter of a bolt circle, has more compact flange structure, is convenient to install and maintain in a compact space, is suitable for low-pressure and high-pressure working conditions, and has strong installation adaptability.
Description
Technical Field
The invention belongs to the technical field of process industrial equipment sealing structures, and particularly relates to a combined sealing gasket suitable for various working conditions.
Background
The process industry equipment itself and the piping between the equipment have fluid (gas or liquid) containment and sealing problems. If petrochemical, chemical and pharmaceutical installations cannot be sealed effectively, the leakage of toxic and harmful media caused by the escape, overflow, drip and leakage of working media will cause environmental pollution and unintended shutdown of the installation.
In order to save the floor area of the device, the arrangement of equipment and pipelines is as compact as possible, and the flange is inevitably arranged in a small space sometimes; meanwhile, some devices are harsh in conditions, and under severe high-temperature and high-pressure conditions, the working environment under working pressure and temperature fluctuation puts high requirements on the installation accessibility, reliability and maintainability of the sealing structure. At present, the gasket structure widely applied between the flanges mainly plays a role in supporting and positioning, cannot play a role in sealing, and meanwhile, the gasket has different specifications and cannot be adapted to various pressure grade working conditions for the flanges with the same size and different pressure grades.
Disclosure of Invention
The invention aims to: in order to solve the technical problems, the combined sealing gasket for sealing equipment or a piping system is provided in an environment with compact arrangement space, high temperature, high pressure, working temperature or pressure fluctuation in the process industry.
The technical scheme of the invention is realized as follows: the utility model provides a be applicable to combined seal gasket for multiple operating mode condition which characterized in that: the combined sealing gasket consists of an inner ring, a deformable sealing gasket, a metal pad and an outer ring from inside to outside in sequence, wherein the thickness H2 of the deformable sealing gasket is greater than the thickness H1 of the inner ring and the thickness H3 of the metal pad, and the thickness H3 of the metal pad is greater than the thickness H4 of the outer ring and the thickness H1 of the inner ring.
The thickness H4 of the outer ring of the combined sealing gasket suitable for various working conditions is the same as the thickness H1 of the inner ring.
The thickness H1 of the inner ring of the combined sealing gasket suitable for various working conditions is 0.6mm less than the thickness H2 single edge of the deformable sealing gasket, and the thickness H2 of the deformable sealing gasket is 0.15mm higher than the thickness H3 single edge of the metal gasket.
The invention relates to a combined sealing gasket suitable for various working conditions, wherein the outer diameter of an outer ring of the combined sealing gasket is the same as the outer diameter of a flange, and a plurality of through grooves for bolts to pass through are formed in the outer ring.
The invention relates to a combined sealing gasket suitable for various working conditions, wherein a through groove is a U-shaped groove which is formed in the edge part of an outer ring and has an outward opening, and a plurality of through grooves are uniformly distributed by taking the axis of the outer ring as the center.
The invention relates to a combined sealing gasket suitable for various working conditions, wherein a deformable sealing gasket is formed by stacking a plurality of graphites, and the graphites are connected with an inner ring and a metal gasket through tenon-and-mortise structures.
The combined sealing gasket suitable for various working conditions is characterized in that one side of graphite close to an inner ring is of a concave surface structure, the inner ring is provided with a convex surface structure matched with the concave surface of the graphite, one side of the graphite close to a metal pad is of a convex surface structure, and the metal pad is provided with a concave surface structure matched with the convex surface of the graphite.
The graphite of the combined sealing gasket suitable for various working conditions determines the compaction density according to the compression rebound test and the designed contact pressure requirement, and the direction between the graphite layers is in a shape of '>' and conforms to the convex surface of the inner ring and the concave surface of the metal gasket.
The combined sealing gasket is suitable for environments with fluctuating working temperature or pressure, has smaller gasket width under the condition of the same pretightening force, can reduce the diameter of a bolt circle, has more compact flange structure, is convenient to install and maintain in a compact space, is suitable for low-pressure and high-pressure working conditions, and has strong installation adaptability.
Drawings
FIG. 1 is a schematic representation of the use of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a sectional view a-a in fig. 2.
Fig. 4 is a schematic view of the structure of the deformable gasket of the present invention.
The labels in the figure are: 1 is a bolt, 2 is a nut, 3 is a flange, 4 is a combined sealing gasket, 5 is a through groove, 6 is graphite, 7 is an outer ring, 8 is a metal gasket, 9 is a deformable sealing gasket, and 10 is an inner ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, or the orientation or the positional relationship which is usually understood by those skilled in the art, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, cannot be understood as limiting the present invention. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be further noted that the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases by those skilled in the art; the drawings in the embodiments are used for clearly and completely describing the technical scheme in the embodiments of the invention, and obviously, the described embodiments are a part of the embodiments of the invention, but not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
As shown in fig. 1, 2 and 3, the combined sealing gasket 4 is applied to a sealing structure type of a flange 3, a bolt 1 and a nut 2, and specifically comprises, from inside to outside, a metal inner ring 10, a deformable sealing gasket 9, a metal gasket 8 and a metal outer ring 7, wherein a thickness H2 of the deformable sealing gasket 9 is greater than a thickness H1 of the inner ring 10 and a thickness H3 of the metal gasket 8, a thickness H3 of the metal gasket 8 is greater than a thickness H4 of the outer ring 7 and a thickness H1 of the inner ring 10, and a thickness H4 of the outer ring 7 is the same as a thickness H1 of the inner ring 10; specifically, the thickness H1 of the inner ring 10 is 0.6mm less than the thickness H2 of the deformable gasket 9, and the thickness H2 of the deformable gasket 9 is 0.15mm greater than the thickness H3 of the metal gasket 8.
The outer ring 7 is provided with a plurality of through grooves 5 for the bolts 1 to pass through, the through grooves 5 are U-shaped grooves which are arranged on the edge portion of the outer ring 7 and have outward openings, and the plurality of through grooves 5 are uniformly distributed by taking the axis of the outer ring 7 as the center. In this embodiment, eight (a number determined by calculation) oblong slots are provided in the outer ring, and bolts are inserted through the oblong slots during connection.
The combined sealing gasket is suitable for environments with fluctuating working temperature or pressure, and comprises a metal gasket, wherein a certain bolt additional pretightening force can be applied to the metal gasket, the deformable sealing gasket is compressed through the bolt pretightening force until the deformable sealing gasket is compressed until the flange is contacted with the metal gasket, the deformable sealing gasket is not compressed any more, and the rest additional pretightening force is applied to the contact surface of the flange and the metal gasket. When the contact surface generates a separation trend (such as a bolt is loosened) due to load fluctuation in the equipment, the additional pretightening force applied to the contact surface of the outer ring and the flange can ensure that the pretightening force applied to the deformable sealing gasket is not changed.
Compared with the existing common gasket structure, the combined sealing gasket of the invention has the advantages that the gasket strength is improved due to the existence of the metal gasket, the gasket width is smaller than that of the common gasket under the condition of the same pretightening force, the diameter of the bolt circle can be reduced, the flange structure is more compact, and the installation and the maintenance in a compact space are convenient.
The combined sealing gasket is suitable for various working conditions: under the working condition of low pressure grade, the tightening force of the bolt is small, the deflection of the flange sealing surface is small, only the deformable sealing gasket is compressed, the metal pad part is not compressed, and the deformable sealing gasket part mainly provides sealing; when the working condition of high pressure level is adopted, the tightening force of the bolt is large, the deflection of the flange sealing surface is large, except the compression of the deformable sealing gasket part, the metal pad part starts to be compressed due to the fact that the deformable sealing gasket part deforms greatly, and the metal pad part plays a role in sealing.
As shown in fig. 4, the deformable sealing gasket 9 is formed by stacking a plurality of graphites 6, the graphites 6 and the inner ring 10 and the graphites 10 and the metal gasket 8 are connected through a mortise-tenon structure, so that a graphite body is effectively fixed, the phenomenon that the graphites 10 and the metal gasket 8 are blown out due to extrusion during working is prevented, one side of the graphites 6 close to the inner ring 10 is of a concave structure, the inner ring 10 is provided with a convex structure matched with the concave surface of the graphites 6, one side of the graphites 6 close to the metal gasket 8 is of a convex structure, the metal gasket 8 is provided with a concave structure matched with the convex surface of the graphites 6, the graphites 6 determine the compaction density according to the compression rebound test and the designed contact pressure requirement, the directions between the graphites 6 are in a shape of ">" and.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a be applicable to combined seal gasket for multiple operating mode condition which characterized in that: the combined sealing gasket (4) is sequentially composed of an inner ring (10), a deformable sealing gasket (9), a metal pad (8) and an outer ring (7) from inside to outside, the thickness H2 of the deformable sealing gasket (9) is larger than the thickness H1 of the inner ring (10) and the thickness H3 of the metal pad (8), and the thickness H3 of the metal pad (8) is larger than the thickness H4 of the outer ring (7) and the thickness H1 of the inner ring (10).
2. The combination type gasket seal applicable to various working conditions according to claim 1, wherein: the thickness H4 of the outer ring (7) is the same as the thickness H1 of the inner ring (10).
3. The combination type gasket seal applicable to various working conditions according to claim 2, wherein: the thickness H1 of the inner ring (10) is 0.6mm less than that of the H2 single edge of the deformable sealing gasket (9), and the thickness H2 of the deformable sealing gasket (9) is 0.15mm higher than that of the H3 single edge of the metal gasket (8).
4. The combination type gasket seal applicable to various working conditions according to claim 1, wherein: the outer diameter of the outer ring (7) is the same as the outer diameter of the flange (3), and a plurality of through grooves (5) for the bolts (1) to pass through are formed in the outer ring (7).
5. The combination type gasket seal applicable to various working conditions according to claim 4, wherein: the through grooves (5) are U-shaped grooves which are arranged on the edge portion of the outer ring (7) and have outward openings, and the through grooves (5) are uniformly distributed by taking the axis of the outer ring (7) as the center.
6. The combination type gasket seal applicable to various working conditions according to any one of claims 1 to 5, wherein: the deformable sealing gasket (9) is formed by stacking a plurality of graphites (6), and the graphites (6) are connected with the inner ring (10) and the graphites (6) are connected with the metal gasket (8) through mortise and tenon structures.
7. The combination type gasket seal suitable for various working conditions of claim 6, wherein: graphite (6) one side that is close to inner ring (10) is the concave surface structure, inner ring (10) be provided with the concave surface assorted convex surface structure of graphite (6), graphite (6) one side that is close to metal pad (8) is the convex surface structure, metal pad (8) be provided with the convex surface assorted concave surface structure of graphite (6).
8. The combination type gasket seal applicable to various working conditions according to claim 7, wherein: the graphite (6) determines the compaction density according to the compression rebound test and the designed contact pressure requirement, and the direction between the layers of the graphite (6) is in a shape of '>', and conforms to the convex surface of the inner ring (10) and the concave surface of the metal pad (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011499732.1A CN112524365A (en) | 2020-12-17 | 2020-12-17 | Combined sealing gasket suitable for various working conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011499732.1A CN112524365A (en) | 2020-12-17 | 2020-12-17 | Combined sealing gasket suitable for various working conditions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112524365A true CN112524365A (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011499732.1A Pending CN112524365A (en) | 2020-12-17 | 2020-12-17 | Combined sealing gasket suitable for various working conditions |
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| Country | Link |
|---|---|
| CN (1) | CN112524365A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700959A (en) * | 2021-08-27 | 2021-11-26 | 中国核动力研究设计院 | Sealing structure |
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|---|---|---|---|---|
| GB1061419A (en) * | 1964-08-27 | 1967-03-15 | Mullard Ltd | Improvements in or relating to gaskets |
| JP2007327576A (en) * | 2006-06-08 | 2007-12-20 | Nippon Pillar Packing Co Ltd | Metal gasket and its manufacturing method |
| EP2101091A1 (en) * | 2008-03-11 | 2009-09-16 | Carrara S.p.A. | Spiral wound gasket |
| CN102518890A (en) * | 2011-12-20 | 2012-06-27 | 苏州宝骅机械技术有限公司 | Seal gasket for flange face sealing |
| CN203442372U (en) * | 2013-09-11 | 2014-02-19 | 慈溪市高新密封材料有限公司 | Environment-friendly semimetal wound gasket |
| CN203906779U (en) * | 2014-06-13 | 2014-10-29 | 慈溪市恒立密封材料有限公司 | Low-stress high-efficiency sealing gasket |
| CN205207672U (en) * | 2015-11-26 | 2016-05-04 | 浙江国泰密封材料股份有限公司 | Ultra -low temperature seal gasket |
| CN206572102U (en) * | 2017-03-03 | 2017-10-20 | 慈溪市高新密封材料有限公司 | Spiral wound gaskets |
| CN111156316A (en) * | 2019-12-23 | 2020-05-15 | 中广核研究院有限公司 | Nonstandard flange sealing gasket for large opening hole and preparation method and sealing method thereof |
| CN214331805U (en) * | 2020-12-17 | 2021-10-01 | 中国成达工程有限公司 | Combined sealing gasket suitable for various working conditions |
-
2020
- 2020-12-17 CN CN202011499732.1A patent/CN112524365A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1061419A (en) * | 1964-08-27 | 1967-03-15 | Mullard Ltd | Improvements in or relating to gaskets |
| JP2007327576A (en) * | 2006-06-08 | 2007-12-20 | Nippon Pillar Packing Co Ltd | Metal gasket and its manufacturing method |
| EP2101091A1 (en) * | 2008-03-11 | 2009-09-16 | Carrara S.p.A. | Spiral wound gasket |
| CN102518890A (en) * | 2011-12-20 | 2012-06-27 | 苏州宝骅机械技术有限公司 | Seal gasket for flange face sealing |
| CN203442372U (en) * | 2013-09-11 | 2014-02-19 | 慈溪市高新密封材料有限公司 | Environment-friendly semimetal wound gasket |
| CN203906779U (en) * | 2014-06-13 | 2014-10-29 | 慈溪市恒立密封材料有限公司 | Low-stress high-efficiency sealing gasket |
| CN205207672U (en) * | 2015-11-26 | 2016-05-04 | 浙江国泰密封材料股份有限公司 | Ultra -low temperature seal gasket |
| CN206572102U (en) * | 2017-03-03 | 2017-10-20 | 慈溪市高新密封材料有限公司 | Spiral wound gaskets |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700959A (en) * | 2021-08-27 | 2021-11-26 | 中国核动力研究设计院 | Sealing structure |
| CN113700959B (en) * | 2021-08-27 | 2023-10-24 | 中国核动力研究设计院 | Sealing structure |
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