CN102678925B - Multi-stage constant stress sealing gasket - Google Patents
Multi-stage constant stress sealing gasket Download PDFInfo
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- CN102678925B CN102678925B CN201210161374.2A CN201210161374A CN102678925B CN 102678925 B CN102678925 B CN 102678925B CN 201210161374 A CN201210161374 A CN 201210161374A CN 102678925 B CN102678925 B CN 102678925B
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Abstract
The invention discloses a multi-stage constant stress sealing gasket, comprising a metal inner ring, a metal outer ring and a flexible filler arranged between the metal inner ring and the metal outer ring. The upper surface and lower surface on the inner side of the metal inner ring are tooth-shaped or wave-shaped; one-stage seal is formed between the upper and lower surfaces on the inner side of the metal inner ring and a connector; the upper surface and lower surface on the outer side of the metal inner ring are also tooth-shaped or wave-shaped and coated with a flexible clad; second-stage seal is formed between the flexible clad and the connector; the upper surface and the lower surface of the flexible filler are respectively protruded from the upper and lower surfaces of the metal inner ring and the metal outer ring; and third-stage seal in face contact sealing type is formed between the upper and lower surfaces and the connector. The invention meets the sealing requirement of high temperature and high pressure, ensures constant sealing stress under alternate load, and is widely applicable to sealing in the industries of nuclear, petroleum, supercritical thermal power, and the like.
Description
Technical field
the present invention relates to a kind of Sealing, be particularly related to that one is suitable for high temperature, high pressure and with the pressurized container under harsh working condition such as the alternate load being formed by thermal shock (thermal cycle), pressure medium fluctuation etc., as heat exchanger, reaction vessel and seal for pipe joints in hydrocracking reaction device, and the gasket seal of the sealing such as the valve of severe rugged environment.
Background technique
under the working condition of high temperature, high pressure and chemical reaction, as hydrocracking reaction device, need various types of static seals, due to the particularity of technique, device has by thermal shock (thermal cycle) and pressure and changes the alternate load causing, and for tradition, adopts gasket seal, as spiral wound gasket, metal octangonal ring, metal oval ring, corrugated serrated compound gasket, grooved metal gasket etc., all cannot meet the seal request in alternate load situation.Therefore for the sealing under harsh working condition, need to provide the very comprehensive Sealing of a kind of comprehensive sealing to meet sealing.
Summary of the invention
technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of seal request that can meet High Temperature High Pressure is provided, and can guarantee again the multistage constant stress gasket seal that guarantees that under alternate load Sealing Stress is constant.
for solving above technical problem, the present invention takes following technological scheme:
a kind of multistage constant stress gasket seal, it comprises ring, metal outer shroud in metal, is arranged on the interior flexible packing encircling between metal outer shroud of metal, wherein: in metal, upper surface and the lower surface of the inner side part of ring are profile of tooth or waveform, in this metal, between the upper surface of the inner side part of ring and lower surface and link, form the primary seal that structural type is line contact sealing; In metal, upper surface and the lower surface of the external lateral portion of ring are also profile of tooth or waveform, and on the upper surface of the external lateral portion encircling and lower surface, be covered with flexible coating in this metal, between this flexible coating and link, form the secondary seal that structural type is line contact sealing; The upper and lower surface of flexible packing is protruded respectively the upper and lower surface of ring and metal outer shroud in metal, and and between link, to form structural type be that face contacts three grades of sealings that seal.
according to further embodiment of the present invention, in described metal, the material of ring can be Austenitic Stainless Steel, nife, Ti metal or titanium alloy etc.Described flexible coating can be Expanded graphite, teflon, without asbestos, mica or soft metal etc.Described flexible packing can be Expanded graphite, teflon, without asbestos, mica or soft metal etc., be preferably Expanded graphite.
according to a preferred aspect of the present invention, the material of ring is Austenitic Stainless Steel, nife in metal, and the flexible coating of Ti metal or titanium alloy is Expanded graphite, teflon, without asbestos, mica or soft metal; Flexible packing is Expanded graphite, teflon, without asbestos, mica or soft metal.
according to the present invention, in metal, the inner side part of ring and the upper surface of external lateral portion and the profile of tooth number of lower surface or crest number can be one or more, preferably multiple.
due to the enforcement of above technological scheme, the present invention compared with prior art tool has the following advantages:
gasket seal of the present invention is line contact sealing contacts seal combination three grades of sealing configuration forms with face, wherein, in metal ring be primary seal ring be also the metal frame of secondary seal, be again the interior ring of three grades of seal rings; Be covered in the flexible coating of ring external lateral portion in metal, the defect of for example flanged surface of energy effective compensation link, avoids the direct contact of metal to metal, can reliably closely be combined with link; The Sealing Stress that the generations strains such as flexible packing is three grades of sealings, and it has high rebound elasticity, the clamping bolt can effective compensation causing because of thermal shock and pressure surge cause is lost; Metal outer shroud plays the role of positioning when pad is installed, and is simultaneously also overload stresses storage, can effective compensation thermal shock (thermal cycle), the Sealing Stress disappearance that causes of the factor such as pressure surge, also guarantee that seal ring avoids transshipping conquassation.Therefore, gasket seal of the present invention can meet the seal request of High Temperature High Pressure, can under alternate load, guarantee that Sealing Stress is constant again, even under harsh working condition, also property guarantees the safe and reliable of sealing, thereby can be widely used in the sealing of the industries such as nuclear industry, oil, chemical industry, supercritical thermal power.
Accompanying drawing explanation
below in conjunction with accompanying drawing and specific embodiment, the present invention will be further described in detail:
fig. 1 is according to the structural representation of multistage constant stress gasket seal of the present invention;
wherein: 1, ring in metal; 10, inner side part; 11, external lateral portion; 2, metal outer shroud; 3, flexible packing; 4, flexible coating.
Embodiment
as shown in Figure 1, according to the multistage constant stress gasket seal of the present embodiment, comprise in metal, encircle 1, metal outer shroud 2, be arranged in metal, encircle 1 and metal outer shroud 2 between flexible packing 3 and flexible coating 4.
in metal, upper surface and the lower surface of the inner side part 10 of ring 1 are profile of tooth or waveform, the upper surface of the inner side part 10 of ring 1 and lower surface and link in this metal (for such as flange etc., in figure do not show) between form the primary seal that structural type is line contact sealing, upper surface and the lower surface of inner side part 10 can be the material of ring own, also can compound other soft alloy or nonmetal, profile of tooth number or crest number can be one or more, and in metal, the material of ring 1 can be Austenitic Stainless Steel, nife etc.
in metal, upper surface and the lower surface of the external lateral portion 11 of ring 1 are waveform.Described flexible coating 4 is covered on the upper surface and lower surface of this external lateral portion 11.Between this flexible coating 4 and link, form the secondary seal that structural type is line contact sealing.Flexible coating 4 can be Expanded graphite or other flexible material, by encircling 1 in metal, provides mechanical support, can determine sealability according to the thickness of metal, ripple spacing and ripple height.
flexible packing 3 be Expanded graphite, and its upper and lower surface is protruded respectively the upper and lower surface of ring and metal outer shroud in metal, and and between link, to form structural type be that face contacts three grades of sealings that seal.The close Sealing Stress that the generations strains such as flexible packing 3 has very high rebound elasticity, the clamping bolt can effective compensation causing because of thermal shock and pressure surge cause lacks.
metal outer shroud 2 plays the role of positioning when pad is installed, and is simultaneously also overload stresses storage, can effective compensation thermal shock (thermal cycle), the Sealing Stress disappearance that causes of the factor such as pressure surge, also guarantee that seal ring avoids transshipping conquassation.
the multistage constant stress gasket seal of the present embodiment has following features:
1, multistage constant stress gasket seal by rational multiple sealing configuration composite design together, and different materials is done good fit, thereby make seal ring there is very high comprehensive sealing.
2, the principle of multistage constant stress gasket seal is multi-stage sealed, makes as far as possible that primary seal and sealing medium are minimum to be contacted, and can effectively prevent primary seal material and medium generation chemical reaction, avoids pad by dielectric corrosion, gasket seal performance to be lost efficacy.
3, the multistage dense seal ring that forms multistage constant stress gasket seal, reduced from inside to outside, and the anti-corrosion capacity of sealing gasket own increases from outside to inside by the probability of dielectric corrosion.This project organization can very effectively reduce sealing gasket by the possibility of dielectric corrosion, to guarantee the effective sealing of sealing gasket.
the close Sealing Stress disappearance that the generation strains such as the clamping bolt 4, can effective compensation causing because of thermal shock and pressure surge cause, guarantees that sealing is effectively lasting.
5, can effective compensation the defect of flanged surface, and can effectively prevent gasket seal by conquassation, blow out, there is excellent reliability.
6, have excellent corrosion resistance, the feature such as high-low temperature resistant and good compression resilience and low pretightening force, can guarantee that pad has excellent sealability and permanent working life.
above the present invention is described in detail; its object is to allow the personage who is familiar with this art can understand content of the present invention and be implemented; can not limit the scope of the invention with this; the equivalence that all Spirit Essences according to the present invention are done changes or modifies, and all should be encompassed in protection scope of the present invention.
Claims (6)
1. a multistage constant stress gasket seal, it is characterized in that: described multistage constant stress gasket seal comprises ring, metal outer shroud in metal, is arranged on the interior flexible packing encircling between described metal outer shroud of described metal, wherein: in described metal, upper surface and the lower surface of the inner side part of ring are profile of tooth or waveform, in this metal, between the upper surface of the inner side part of ring and lower surface and link, form the primary seal that structural type is line contact sealing; In described metal, upper surface and the lower surface of the external lateral portion of ring are also profile of tooth or waveform, and on the upper surface of the external lateral portion encircling and lower surface, be covered with flexible coating in this metal, between this flexibility coating and described link, form the secondary seal that structural type is line contact sealing; The upper and lower surface of described flexible packing is protruded respectively the upper and lower surface of ring and described metal outer shroud in described metal, and and between described link, to form structural type be that face contacts three grades of sealings that seal.
2. multistage constant stress gasket seal according to claim 1, is characterized in that: in described metal, the material of ring is Austenitic Stainless Steel, nife, Ti metal or titanium alloy.
3. multistage constant stress gasket seal according to claim 1, is characterized in that: the material of described flexible coating is Expanded graphite, teflon, without asbestos, mica or soft metal.
4. multistage constant stress gasket seal according to claim 1, is characterized in that: described flexible packing is Expanded graphite, teflon, without asbestos, mica or soft metal.
5. multistage constant stress gasket seal according to claim 1, is characterized in that: in described metal, the material of ring is Austenitic Stainless Steel, nife, Ti metal or titanium alloy; The material of described flexible coating is Expanded graphite, teflon, without asbestos, mica or soft metal; Described flexible packing is Expanded graphite, teflon, without asbestos, mica or soft metal.
6. multistage constant stress gasket seal according to claim 1, is characterized in that: in described metal, the inner side part of ring and the upper surface of external lateral portion and the profile of tooth number of lower surface or crest number are one or more.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210161374.2A CN102678925B (en) | 2012-05-23 | 2012-05-23 | Multi-stage constant stress sealing gasket |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210161374.2A CN102678925B (en) | 2012-05-23 | 2012-05-23 | Multi-stage constant stress sealing gasket |
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| CN102678925A CN102678925A (en) | 2012-09-19 |
| CN102678925B true CN102678925B (en) | 2014-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224551A (en) * | 2016-08-31 | 2016-12-14 | 苏州宝骅机械技术有限公司 | Gasket seal |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103267186A (en) * | 2013-06-20 | 2013-08-28 | 苏州柏德纳科技有限公司 | Flange gasket for automobile exhaust pipe |
| CN103968074A (en) * | 2014-04-22 | 2014-08-06 | 章华 | Middle flange sealing structure of high-pressure valve |
| CN105156676B (en) * | 2015-07-17 | 2017-05-10 | 滨州双峰石墨密封材料有限公司 | Multi-stage sealing graphite gasket |
| CN105972210A (en) * | 2016-07-11 | 2016-09-28 | 苏州宝骅机械技术有限公司 | Sealing gasket |
| CN106224550A (en) * | 2016-08-31 | 2016-12-14 | 苏州宝骅机械技术有限公司 | A kind of gasket seal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202708061U (en) * | 2012-05-23 | 2013-01-30 | 苏州宝骅机械技术有限公司 | Multi-stage constant stress sealing gasket |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007327576A (en) * | 2006-06-08 | 2007-12-20 | Nippon Pillar Packing Co Ltd | Metal gasket and its manufacturing method |
| JP4877673B2 (en) * | 2007-04-12 | 2012-02-15 | 日本バルカー工業株式会社 | Serrated gasket with sheet layer |
| BRPI0810669B1 (en) * | 2007-04-24 | 2019-11-05 | Reinz-Dichtungs-Gmbh | flat metal gasket |
| CN101435506B (en) * | 2008-12-09 | 2013-03-20 | 马志刚 | Prestress sealing gasket |
| CN201531594U (en) * | 2009-09-30 | 2010-07-21 | 马志刚 | Constant stress seal gasket capable of detecting leakage |
| CN201763947U (en) * | 2010-07-30 | 2011-03-16 | 方德银 | Arc-shaped corrugated-toothed metallic sealing gasket |
| CN201836367U (en) * | 2010-11-05 | 2011-05-18 | 刘秀英 | Self-energizing corrugated composite gasket |
| CN102094970A (en) * | 2011-02-01 | 2011-06-15 | 宁波天生密封件有限公司 | Sealing gasket capable of controlling range of stress relaxation |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202708061U (en) * | 2012-05-23 | 2013-01-30 | 苏州宝骅机械技术有限公司 | Multi-stage constant stress sealing gasket |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224551A (en) * | 2016-08-31 | 2016-12-14 | 苏州宝骅机械技术有限公司 | Gasket seal |
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| CN102678925A (en) | 2012-09-19 |
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Address after: 215415, Jiangsu, Suzhou province Taicang Regal Economic Development Zone Patentee after: Suzhou Bao Hua sealing Polytron Technologies Inc Address before: 215415, Jiangsu, Suzhou province Taicang Regal Economic Development Zone Patentee before: Suzhou Baohua Mechanical Technology Co., Ltd. |
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