CN1280570C - Sealing pad - Google Patents
Sealing pad Download PDFInfo
- Publication number
- CN1280570C CN1280570C CN 200410077261 CN200410077261A CN1280570C CN 1280570 C CN1280570 C CN 1280570C CN 200410077261 CN200410077261 CN 200410077261 CN 200410077261 A CN200410077261 A CN 200410077261A CN 1280570 C CN1280570 C CN 1280570C
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- Prior art keywords
- hole
- wave
- structure surface
- graphite layer
- metal frame
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- Expired - Fee Related
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Abstract
The present invention relates to a sealing pad which comprises a metallic framework, wherein at least one through hole is formed in the metallic framework, and a wave-shaped structure surface surrounding the through hole is arranged in the outer edge region of the ring through hole of the metallic framework. The sealing pad is characterized in that a graphite layer is embedded and covered on the wave-shaped structure surface; due to the adoption of the wave-shaped structure surface arranged on the metallic framework, particularly the graphite layer embedded and covered on the wave-shaped structure surface, when used for high-temperature and high-pressure devices, the present invention can not only maintain the wave-shaped structure surface to have the advantage of good linear sealing under pressure, but also utilize the unique expansibility of the graphite layer to repair the insufficiency of unstable sealing property caused by the stress relaxation of the wave-shaped metal structure surface under the state of high temperature and high pressure so as to reach the property complementation of the two materials in the sealing property aspect, and moreover, the integrate sealing property of the sealing pad is largely increased under various environments.
Description
Technical field
The present invention relates to a kind of sealing gasket, the sealing gasket that particularly a kind of petrochemical industry equipment upper pipeline, flange are used.
Background technique
In industries such as oil, chemical industry, chemical fibre, electric power, metallurgy, device therefor all has higher tightness requirement.At present above-mentioned industry is adopted structural types such as asbestos rubber pad, iron bag pad, spiral wound gasket usually with the pipeline and the flange seal of equipment, but adopt above-mentioned sealing gasket all to exist in deficiencies such as high temperature, high pressure and the reductions of long-time use seal performance.At above-mentioned existing problems, Chinese patent CN1443289A discloses a kind of " sealing gasket and manufacture method thereof ", its main technical schemes is " having one deck metal layer at least; wherein form a through hole at least; form at least on the zone waveform or zigzag configuration around through hole on these or at least one metal layer ", the advantage of this structure is behind the sealing gasket pressurized, particularly behind pad ground roll shape or sawtooth pattern zone pressurized, produce distortion, form the linear sealing of many annulars, simultaneously because the rebounding force of crest, can realize pad and sealed 's flexible adjustment.But this structure is owing to be that metal is made, when residing sealed be higher plane of metal covering, particularly roughness or the working state of equipment own when being in High Temperature High Pressure, can cause partially sealed degree to descend because of metal thermal distortion at high temperature, even leakage.
Summary of the invention
Technical problem to be solved by this invention is, a kind of good rebound elasticity that both had is provided, again the certain thermal expansion of tool and can be high temperature resistant, the sealing gasket of high pressure.
A kind of sealing gasket, comprise the metal frame (1) that is formed with a through hole (4) at least, be provided with waveform construction face (1a) around through hole (4) in metal frame (1) ring through hole (4) outer edge area, go up embedding at waveform construction face (1a) and be covered with graphite layer (2), it is characterized in that above-mentioned waveform construction face (1a) is for concentric and its cross section is the ring formation of arc waveform with through hole (4) by 4～6 circles, it is suitable that flange seal position width is joined by its inner ring to the width of outer ring and institute, at the above-mentioned faced washer (1b) that is provided with extension in waveform construction face (1a) outer rim.
The further technological scheme of the present invention is, is divided into the round platform that is formed with projection on the waveform construction face of metal frame both sides in above-mentioned graphite layer.
The present invention is owing to adopted the waveform construction face that is provided with on metal frame, the graphite layer that embedding is covered on the waveform construction face particularly, when being applied to high temperature, high-tension apparatus, the advantage that has the good linear sealing in the time of both can having kept waveform construction face pressurized, can utilize the unique expansibility of graphite layer to repair metal waveform construction face stress relaxation and unsettled deficiency of sealing of bringing under high temperature, high pressure conditions again, reach the complementation of characteristic between two kinds of materials aspect the sealing, significantly improved the comprehensive sealing performance of sealing gasket under various environment.
Description of drawings
Fig. 1 is a plan view of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is a stereogram of the present invention.
Embodiment
The present invention such as Fig. 1, Fig. 2, a kind of sealing gasket shown in Figure 3, comprise the metal frame 1 that is formed with a through hole 4 at least, be provided with waveform construction face 1a, be characterized in that embedding is covered with graphite layer 2 on waveform construction face 1a around through hole 4 in metal frame 1 ring through hole 4 outer edge area.The combination of above-mentioned waveform construction face 1a and graphite layer 3 can make sealing gasket have rebound elasticity preferably, to overcome because of the stress relaxation that temperature variation occurs, the problem of seal failure, the flange seal position is under the effective seal specific pressure always, has guaranteed that the nothing at sealing position is revealed.In addition, because by above-mentioned two kinds of sealing gaskets that material is composited, itself all has temperature tolerance preferably, applicable different temperature occasion, in actual application, because a variety of causes such as burn into scuffing, machining accuracy various defectives also can occur at flange facing, and the expanding flexible that the graphite layer of using the sealing gasket setting has can effectively be repaired the defective of flange and sealed member connecting part thereof, to guarantee sealability.
The present invention in actual applications further structure be, above-mentioned waveform construction face 1a constitutes for the ring that and its cross section concentric by 4～6 circles and through hole 4 are the arc waveform, its inner ring is to the width of outer ring and to join flange seal position width suitable.Above-mentioned graphite layer 2 is divided on the waveform construction face 1a of metal frame 1 both sides, and forms the round platform of projection in metal frame 4 both side surface.The thickness of above-mentioned graphite layer 2 is because of deciding according to the size of sealed component and the interior pressure that is provided with, usually graphite layer 2 thickness are 1-3mm, the above-mentioned metal frame 1 general stainless steel sheets that adopts is made, it is good that its thickness mostly is controlled at the 0.2-1mm scope, be reliability and the tightness of guaranteeing to assemble, be provided with the faced washer 1b of extension in waveform construction face 1a outer rim, its effect mainly is for being fastenedly connected the face location with flange, with guarantee the sealing surface assembling reliability, in the processing of sealing gasket, the above-mentioned metal frame that is made of waveform construction face 1a and faced washer 1b 1 adopts the cold stamping once-through, and embedding overlays on the graphite layer 2 of waveform construction face 1a and can adopt bonding way to be connected with metal frame 1.
Claims (5)
1, a kind of sealing gasket, comprise the metal frame (1) that is formed with a through hole (4) at least, be provided with waveform construction face (1a) around through hole (4) in metal frame (1) ring through hole (4) outer edge area, go up embedding at waveform construction face (1a) and be covered with graphite layer (2), it is characterized in that above-mentioned waveform construction face (1a) is for concentric and its cross section is the ring formation of arc waveform with through hole (4) by 4～6 circles, it is suitable that flange seal position width is joined by its inner ring to the width of outer ring and institute, at the above-mentioned faced washer (1b) that is provided with extension in waveform construction face (1a) outer rim.
2, sealing gasket according to claim 1 is characterized in that above-mentioned graphite layer (2) is divided on the waveform construction face (1a) of metal frame (1) both sides, and forms the round platform of projection in metal frame (1) both side surface.
3, sealing gasket according to claim 1, the thickness that it is characterized in that above-mentioned graphite layer (2) is 1～3mm.
4, sealing gasket according to claim 1 is characterized in that being formed in one by the metal frame (1) that waveform construction face (1a) and faced washer (1b) constitute and makes.
5, sealing gasket according to claim 4 is characterized in that the sheet of described metal frame (1) is thick and is 0.2-1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410077261 CN1280570C (en) | 2004-12-14 | 2004-12-14 | Sealing pad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410077261 CN1280570C (en) | 2004-12-14 | 2004-12-14 | Sealing pad |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1624367A CN1624367A (en) | 2005-06-08 |
| CN1280570C true CN1280570C (en) | 2006-10-18 |
Family
ID=34765414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410077261 Expired - Fee Related CN1280570C (en) | 2004-12-14 | 2004-12-14 | Sealing pad |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1280570C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4324607B2 (en) * | 2006-08-11 | 2009-09-02 | 日本ピラー工業株式会社 | Non-asbestos gasket |
| ITRM20130671A1 (en) * | 2013-12-04 | 2015-06-05 | Bridgestone Corp | TIRE INCLUDING A GRAPHITE OR GRAPHENE LAYER STORED ON A SURFACE OF THE INTERNAL LAYER |
| CN103671918B (en) * | 2013-12-06 | 2016-05-25 | 艾志（南京）环保管接技术股份有限公司 | A kind of metal serrated gasket of the interspersed rank of only presenting a theatrical performance as the last item on a programme |
| DE202015100048U1 (en) * | 2015-01-08 | 2016-04-11 | Krones Ag | seal |
| CN107606151A (en) * | 2017-11-20 | 2018-01-19 | 济南大学 | A kind of high temperature high voltage resistant metal and graphite Composition spacer |
| RU2690392C1 (en) * | 2018-12-28 | 2019-06-03 | Акционерное общество "Федеральный центр ядерной и радиационной безопасности" (АО ФЦЯРБ) | Sealing between surfaces fixed relative to each other |
-
2004
- 2004-12-14 CN CN 200410077261 patent/CN1280570C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1624367A (en) | 2005-06-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061018 Termination date: 20121214 |