CN220688333U - Metal self-tightening double-V sealing ring - Google Patents
Metal self-tightening double-V sealing ring Download PDFInfo
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- CN220688333U CN220688333U CN202322476690.5U CN202322476690U CN220688333U CN 220688333 U CN220688333 U CN 220688333U CN 202322476690 U CN202322476690 U CN 202322476690U CN 220688333 U CN220688333 U CN 220688333U
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- 238000007789 sealing Methods 0.000 title claims abstract description 143
- 239000002184 metal Substances 0.000 title claims abstract description 70
- 230000007704 transition Effects 0.000 claims description 12
- 238000005260 corrosion Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 238000011161 development Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The utility model relates to a metal self-tightening double-V sealing ring, which comprises an annular metal sealing ring body, wherein the metal sealing ring body is a circular metal ring, the inner ring and the outer ring of the circular metal sealing ring body are respectively provided with a radial inward V-shaped circumferential opening and a radial outward V-shaped circumferential opening, the upper end and the lower end of the V-shaped circumferential opening are provided with circular protrusions, a circular arc-shaped supporting body is arranged between the inner ring and the outer ring, and the sealing ring body forms a circular elastic body with a double-V-shaped section. The metal sealing ring body is a self-tightening sealing ring, is particularly suitable for flange connectors under high-temperature and high-pressure working conditions, forms a multi-layer sealing surface with the flange surface when in use, has larger sealing width and has good sealing effect; can bear larger load, has better adaptability and compensation capability for deflection and separation of flange surfaces, has better compression rebound resilience performance and self-tightening performance as a whole, and is reliable in sealing.
Description
Technical Field
The utility model relates to the technical field of flange connection sealing, in particular to a metal self-tightening double-V sealing ring.
Background
Petrochemical equipment and pipelines are often detachably connected due to production operation and maintenance requirements. The most widely adopted is flange connection, and the basic requirement of the flange connection is that the sealing is reliable so as to ensure the long-term safe operation of production. Seals are critical components that determine safe and reliable operation and long-term use of industrial equipment, playing an important role in industrial processes. With the rapid development of industry and the improvement of advanced technical level, the running condition of machine equipment is more and more severe, the requirements on sealing elements are higher, for example, the sealing elements face the reliability problems of high temperature, low temperature, high pressure, strong corrosion and the like, the failure of the sealing elements not only can cause the damage of production equipment and the reduction of industrial production yield, but also the leakage of working media can even cause huge safety and environmental problems.
The development of the process technology is higher in requirements on high temperature and high pressure, the existing nonmetallic and combined sealing gaskets cannot meet the requirements, and compared with nonmetallic gaskets and combined gaskets, the metallic sealing gaskets can bear higher temperature and pressure and have better chemical compatibility, anti-scouring capability and recyclability, so that the metallic sealing gaskets are widely used in flange connection of high-temperature, high-pressure and strong-corrosion media.
The existing flange metal sealing gasket has the following defects: 1. part of the metal gasket needs to be installed in a specific sealing surface groove for use, and meanwhile, higher machining precision is required, so that the machining cost is increased; 2. the effective sealing is realized by needing larger pressing force, the rigidity of the flange is increased, the diameter of the bolt is increased, the number of the bolts is increased, and the flange is heavy and the manufacturing cost is increased. 3. The rebound compensation performance is poor, the sealing ring is easy to collapse under the working conditions of larger load, load fluctuation and flange deflection, and the capability of compensating the contact pressure drop of the sealing ring and the flange is poor.
Disclosure of Invention
The utility model aims to provide a metal self-tightening double-V sealing ring, which solves the problems in the technical background.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model relates to a metal self-tightening double-V sealing ring, wherein the metal sealing ring body is a circular metal ring, the inner ring and the outer ring of the circular metal sealing ring body are respectively provided with a V-shaped circumferential opening which is radially inwards and radially outwards, the upper end and the lower end of the V-shaped circumferential opening are provided with circular protrusions, a circular arc-shaped supporting body is arranged between the inner ring and the outer ring, and the sealing ring body forms a circular elastic body with a double-V-shaped section.
Further, the metal sealing ring body is a revolving body with a double-V-shaped cross section, the double-V-shaped cross section comprises an opening center circular arc section, a V-shaped straight line section, a vertical transition section, a protruding circular arc sealing section, a transition support connecting section and a circular arc support sealing section which are sequentially connected, and the whole metal sealing ring body is of a central symmetrical structure.
Further, the cross section of the metal sealing ring body is double V-shaped, an opening center arc section forming the double V-shaped cross section is a partial arc with a curvature radius R1, an included angle between a V-shaped straight line section and the horizontal direction is a, the length of a vertical transition section is b, a protruding arc sealing section is a semicircular arc with a curvature radius R2, a transition support connecting section is a straight line with an included angle c with the horizontal direction, and an arc support sealing section is a partial arc with a curvature radius R3.
Further, the same structure of the metal sealing ring body can be used for sealing internal pressure and sealing external pressure respectively.
Further, the metal sealing ring body is made of alloy steel with high temperature resistance, corrosion resistance and oxidation resistance.
Further, the surfaces of the protruding arc sealing section and the arc supporting sealing section on the circumferential end face of the metal sealing ring body are coated or electroplated with soft metal layers.
The beneficial effects of the utility model are as follows:
(1) The utility model has strong applicability, is suitable for various flange surfaces, has low requirement on the processing precision of the flange, and saves the processing cost.
(2) The utility model does not need larger pressing force when realizing effective sealing, has low requirements on the rigidity of the flange and the strength of the bolt, and reduces the manufacturing cost.
(3) The utility model can bear larger load, has stronger adaptability to flange deflection, reliable structure and stable sealing effect.
(4) The utility model has better compression retraction elasticity and better self-tightening performance, forms a multi-layer sealing surface between the flange surface and the sealing surface, can effectively compensate the flange separation and contact pressure reduction caused by temperature and pressure fluctuation bolt looseness, flange deflection and other reasons, has good sealing effect and reliable sealing.
Drawings
FIG. 1 is a cross-sectional view of the present utility model;
FIG. 2 is a cross-sectional construction view of the present utility model;
FIG. 3 is an assembly view of a first embodiment of the present utility model with a flange member;
FIG. 4 is an assembly view of a second embodiment of the present utility model with a flange member;
in the figure: 1. a metal seal ring body; 2. a radially inward V-shaped circumferential opening; 3. a radially outwardly facing V-shaped circumferential opening; 4. a circular arc-shaped support body; 5. a circular protrusion; 6. an open center circular arc section; 7. a V-shaped straight line segment; 8. a vertical transition section; 9. protruding arc sealing section; 10. a transition support connection section; 11. arc-shaped supporting sealing sections; 12. an upper flange; 13. a lower flange; 14. an upper flange; 15. and a lower flange.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in the embodiments of the present utility model, the terms "radial," "upper," "lower," "inner," "outer," "middle," and terms of direction or positional relationship in the description and the above drawings are merely used for convenience of description, and do not denote or imply that the apparatus or elements must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the utility model.
The utility model is further described with reference to fig. 1 to 2:
the utility model relates to a metal self-tightening double-V sealing ring, which comprises an annular metal sealing ring body 1, wherein the metal sealing ring body 1 is a circular metal ring, the inner ring and the outer ring of the circular metal sealing ring body 1 are respectively provided with radial inward and radial outward V-shaped circumferential openings 2 and 3, the upper end and the lower end of the V-shaped circumferential openings 2 and 3 are provided with circular protrusions 5, the middle of the inner ring and the outer ring is provided with a circular arc-shaped supporting body 4, the metal sealing ring body 1 is a revolving body with a double-V-shaped cross section, the double-V-shaped cross section comprises an opening center circular arc section 6, a V-shaped straight line section 7, a vertical transition section 8, a protruding circular arc sealing section 9, a transition supporting connecting section 10 and a circular arc supporting sealing section 11, and the whole metal sealing ring body 1 is in a central symmetrical structure;
the sealing ring body 1 forms a circular ring-shaped elastomer with a double V-shaped section, has good compression retraction elastic energy, and when in use, the metal sealing ring body 1 is compressed to generate larger elastic deformation and contact stress, the protruding circular arc sealing sections 9 and the circular arc supporting sealing sections 11 on the metal sealing ring body 1 are pressed on the surfaces of the upper flanges 12 and 14 and the lower flanges 13 and 15, and form effective close contact and lamination with the microcosmic uneven parts on the surfaces of the upper flanges 12 and 14 and the lower flanges 13 and 15, so that a multi-layer sealing surface is formed to realize initial sealing. The convex arc sealing section 9 and the flange sealing surface can generate larger contact stress, the arc supporting body 4 plays a role of connecting and supporting, the sealing ring body is prevented from being crushed, the offset rotation of the flange can be adapted, the flange surface is separated and deflected due to rising of sealing medium pressure or loosening of bolts and the like, the metal sealing ring body 1 compensates by means of excellent rebound resilience, meanwhile, the radial inward V-shaped circumferential opening 2 is axially opened to compensate for the reduction of sealing ratio caused by separating and deflection of a sealing surface, the radial inward V-shaped circumferential opening 2 is further opened and is more compressed with the upper flanges 12 and 14 along with the continuous increase of working pressure, the lower flanges 13 and 15 are more compressed, so that the contact width and the contact stress of the convex arc sealing section 9 and the upper flanges 12 and 14 and the sealing surfaces of the lower flanges 13 and 15 are increased, and the sealing effectiveness and reliability are ensured;
the metal sealing ring body 1 is made of alloy steel with high temperature resistance, corrosion resistance and oxidation resistance and is suitable for severe and complicated working conditions, the surfaces of the protruding arc sealing section 9 and the arc supporting sealing section 11 on the circumferential end surface of the metal sealing ring body 1 are coated or electroplated with soft metal layers, and the soft metal layers and the contact sealing surfaces of the upper flange and the lower flange generate plastic deformation and expansion under the action of contact stress, so that a tiny leakage channel between the arc sealing surfaces of the arc sealing sections on the metal sealing ring body 1 and the contact sealing surfaces of the upper flange and the lower flange is filled, and the sealing effect is ensured.
In the actual use process of the metal seal ring body 1, the following embodiments exist:
in the first embodiment, as shown in fig. 3, the pressure born by the sealing system is internal pressure, the metal sealing ring body 1 is installed in the annular groove of the lower flange 13, when the upper flange 12 and the lower flange 13 are screwed up by using connecting bolts, the metal sealing ring body 1 is elastically and axially compressed, the protruding circular arc sealing section 9 and the circular arc supporting sealing section 11 of the metal sealing ring body 1 are pressed on the surfaces of the upper flange 12 and the lower flange 13, and form effective close contact and fit with the micro uneven parts on the surfaces of the upper flange 12 and the lower flange 13, so as to form a multi-layer sealing surface to realize initial sealing. When the working pressure rises, the sealing surface of the upper flange 12 and the sealing surface of the lower flange 13 are separated from each other, and simultaneously the opening of the metal sealing ring body 1 is axially opened to compensate for the reduction of the sealing specific pressure caused by the separation of the sealing surface of the upper flange 12 and the sealing surface of the lower flange 13; as the working pressure continues to increase, the opening of the metal seal ring body 1 further opens and is pressed more and more tightly with the sealing surfaces of the upper flange 12 and the lower flange 13, the contact stress and the contact width increase, the multilayer line contact at the initial stage of the sealing surface is converted into the multilayer wide-area contact, the flow resistance of the medium in the micro channel increases, and the sealing performance of the metal seal ring body 1 is ensured.
In the second embodiment, as shown in fig. 4, when the pressure born by the sealing system is external pressure or vacuum system, the metal sealing ring body 1 is installed in the ring groove of the lower flange 15, when the upper flange 14 and the lower flange 15 are screwed down by connecting bolts, the metal sealing ring body 1 is elastically compressed axially, the protruding circular arc sealing section 9 and the circular arc supporting sealing section 11 of the metal sealing ring body 1 are pressed on the surfaces of the upper flange 14 and the lower flange 15, and form effective close contact and fit with the micro uneven parts on the surfaces of the upper flange 14 and the lower flange 15, so as to form a multi-layer sealing surface to realize initial sealing. When the working pressure rises, the sealing surface of the upper flange 14 and the sealing surface of the lower flange 15 are separated from each other, and simultaneously the opening of the metal sealing ring body 1 is axially opened to compensate for the reduction of the sealing specific pressure caused by the separation of the sealing surface of the upper flange 14 and the sealing surface of the lower flange 15; as the working pressure continues to increase, the opening of the metal seal ring body 1 further opens and is pressed more and more tightly with the sealing surfaces of the upper flange 14 and the lower flange 15, the contact stress and the contact width increase, the multilayer line contact at the initial stage of the sealing surface is converted into the multilayer wide-area contact, the flow resistance of the medium in the micro channel increases, and the sealing performance of the metal seal ring body 1 is ensured.
The above description is only a partial preferred example of the present utility model, and any person skilled in the art can modify the above-described technical solution or change it into an equivalent technical solution, so that any simple modification or equivalent substitution according to the technical solution of the present utility model falls within the scope of the present utility model.
Claims (6)
1. A metal self-tightening double V sealing ring is characterized in that: the novel metal seal ring comprises an annular metal seal ring body (1), wherein the metal seal ring body (1) is a circular metal ring, the inner ring and the outer ring of the metal seal ring body (1) are respectively provided with radial inward and radial outward V-shaped circumferential openings (2) and (3), the upper end and the lower end of each V-shaped circumferential opening (2) and (3) are provided with circular protrusions (5), the middle of the inner ring and the outer ring is provided with a circular arc-shaped supporting body (4), and the seal ring body (1) forms a circular elastic body with a double-V-shaped section.
2. The metal self-tightening double-V sealing ring according to claim 1, wherein the metal sealing ring body (1) is a revolving body with a double-V-shaped cross section, the double-V-shaped cross section comprises an opening center arc section (6), a V-shaped straight line section (7), a vertical transition section (8), a protruding arc sealing section (9), a transition support connecting section (10) and an arc support sealing section (11) which are sequentially connected, and the metal sealing ring body (1) is of a center symmetrical structure as a whole.
3. The metal self-tightening double-V sealing ring according to claim 1, wherein the cross section of the metal sealing ring body (1) is double-V-shaped, an opening center circular arc section (6) forming the double-V-shaped cross section is a partial circular arc with a curvature radius R1, an included angle between a V-shaped straight line section (7) and the horizontal direction is a, the length of a vertical transition section (8) is b, a protruding circular arc sealing section (9) is a semicircular arc with a curvature radius R2, a transition support connecting section (10) is a straight line with an included angle c with the horizontal direction, and a circular arc support sealing section (11) is a partial circular arc with a curvature radius R3.
4. The metal self-tightening double-V sealing ring according to claim 1, wherein the same structure of the metal sealing ring body (1) can be used for sealing internal pressure and sealing external pressure respectively.
5. The metal self-tightening double-V sealing ring according to claim 1, wherein the metal sealing ring body (1) is made of high-temperature-resistant, corrosion-resistant and oxidation-resistant alloy steel.
6. The metal self-tightening double-V sealing ring according to claim 1, wherein the surfaces of the protruding arc sealing section (9) and the arc supporting sealing section (11) on the circumferential end face of the metal sealing ring body (1) are coated or electroplated with soft metal layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322476690.5U CN220688333U (en) | 2023-09-12 | 2023-09-12 | Metal self-tightening double-V sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322476690.5U CN220688333U (en) | 2023-09-12 | 2023-09-12 | Metal self-tightening double-V sealing ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220688333U true CN220688333U (en) | 2024-03-29 |
Family
ID=90372325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322476690.5U Active CN220688333U (en) | 2023-09-12 | 2023-09-12 | Metal self-tightening double-V sealing ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220688333U (en) |
-
2023
- 2023-09-12 CN CN202322476690.5U patent/CN220688333U/en active Active
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