CN209340496U

CN209340496U - Self-sealing gasket

Info

Publication number: CN209340496U
Application number: CN201822140335.XU
Authority: CN
Inventors: 胡林平
Original assignee: CIXI BURGMANN SEALING MATERIALS Co Ltd
Current assignee: CIXI BURGMANN SEALING MATERIALS Co Ltd
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2019-09-03
Anticipated expiration: 2028-12-18

Abstract

The utility model relates to a kind of self-sealing gaskets, including shim body, shim body offers concentric tooth form groove in both sides sealing face up and down, the tooth form flute surfaces of the two sides are covered with nonmetallic sealant, it is characterized by: the outside of shim body is equipped with annular ring, the inside edge of annular ring at least extends partially into shim body, compared with prior art, the utility model has the advantage of the outsides of shim body to be equipped with a ring around the annular ring of concentric arrays, so that self-sealing gasket and flange are presented, there are two types of the ways of contact, self-sealing gasket is when in use in this way, the nonmetallic sealant of two sides can first play sealing function above and below sealing surface, and the tooth form groove of the two sides up and down of shim body only needs lower preload pressure, workload when gasket installation can be effectively reduced；In addition when flange surface out-of-flatness, can compress gasket again, allow the annular concentric circle of original non-stress (or few stress) also to seal.

Description

Self-sealing gasket

Technical field

The utility model relates to a kind of gasket more particularly to a kind of self-sealing gaskets.

Background technique

Flange connection is a kind of detachable connection method for being usually used in container, pipeline, valve, and gasket is wherein important Sealing element, the superiority and inferiority of performance directly influences the sealing reliability of flanged joint.And traditional gasket such as rubber sheet gasket, There is the defects of easily falling apart, easily conquassation and pre-pressing force are higher in wound gasket lamp, it is difficult to meet the various demands of industrial application.Separately Outside, also a kind of sealing surface is zigzag metal serrated gasket currently on the market, and concentric zigzag grooved metal gasket can provide Effective sealing, the graphite of re-binding softness in surface as needed, tetrafluoro, the material of mica etc., to improve sealing effect.But it passes The metal serrated gasket of system, it is such metal gasket on flat metal flat that concentric tooth form circle, which is generally provided with two sides, Piece can play preferable sealing function when flange face is smooth, however in flange face out-of-flatness, which has then been difficult to It is acted on to preferable compensation sealing.

Summary of the invention

Technical problem to be solved in the utility model be for above-mentioned state of the art and provide it is a kind of can be effectively right Flange plays the self-sealing gasket of compensation sealing.

Technical solution adopted by the utility model to solve the above technical problems is as follows: the self-sealing gasket, including gasket sheet Body, the shim body offers concentric tooth form groove in both sides sealing face up and down, and the tooth form flute surfaces of the two sides are also It is covered with nonmetallic sealant, it is characterised in that: the outside of the shim body is equipped with a ring around the concentric arrays Annular ring, the inside edge of annular ring at least extend partially into the shim body.

Further, the nonmetallic sealant of annular ring and two sides above and below the shim body, which collectively forms, surrounds institute State " convex " word sealant of shim body.

Further, the nonmetallic sealant of annular ring and the side at least within of two sides above and below the shim body Between gap d size between 0.1mm~0.2mm.The non-gold of the side at least within of two sides above and below annular ring and shim body Belong to the gap between sealant can guarantee self-sealing gasket in the state of high pressure effect, can to annular ring relative distension, with The backup seal line for forming counter pressure provides additional sealability, forms the compressive sealed protection mechanism of second level, so significantly Improve the service life of self-sealing gasket.

Further, annular ring and nonmetallic sealant are graphite, mica or polytetrafluoroethylene (PTFE).This is nonmetallic close Sealing and annular ring are graphite, mica or polytetrafluoroethylene (PTFE), and the nonmetallic sealant and annular ring can give shim body more Ductility well, additionally it is possible to bear serious heat expansion, so that the shim body can adapt to the high temperature and high pressure environment of more intensity, reach It avoids damaging the surface of flange in high pressure occasion while to good sealing effect.

Preferably, the angle α range of the tooth form groove is 60 °~90 °.The shape acted on due to self-sealing gasket in high pressure Under state, anti-extrusion effect can be played jointly with the tooth form groove for being located at sealing surface middle section, angle is preferably 60 ° ~90 °, which can be effectively ensured with preferable anti-extrusion ability.

Further, it is described up and down two sides tooth form groove be all provided be set to intermediate outwardly convex then it is gradually inside to both sides The structure of falling, accordingly, the nonmetallic sealant of two sides is also in intermediate outwardly convex then to two above and below the shim body The structure that side is gradually inwardly fallen after rise, so that the shim body is in the section of radial direction in thin convex in thick middle, both sides Arc structure.

Compared with prior art, a ring is equipped with the utility model has the advantage of the outside of shim body to arrange around concentric circles The annular ring of column, so that self-sealing gasket and flange are presented there are two types of the way of contact, such self-sealing gasket when in use, is located at The nonmetallic sealant of sealing surface two sides up and down can first play sealing function, and the tooth form groove of the two sides up and down of shim body Lower preload pressure is only needed, workload when gasket installation can be effectively reduced；It in addition, can be with when flange surface out-of-flatness Compress gasket again allows the annular concentric circle of original non-stress (or few stress) also to seal, has compensation sealing effect Strong feature.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model embodiment；

Fig. 2 is the sectional side elevation of the utility model embodiment.

Specific embodiment

The utility model is described in further detail below in conjunction with figure embodiment.

It is the optimal embodiment of the utility model as shown in Fig. 1~2.Self-sealing gasket in the present embodiment includes gasket Ontology 1, about 1 both sides sealing face of shim body offer concentric tooth form groove 11, and 11 table of tooth form groove of the two sides Face is also covered with nonmetallic sealant 12, and the outside of shim body 1 is equipped with a ring around the annular ring 2 of concentric arrays, annular The inside edge of circle 2 at least extends partially into shim body 1.Specifically, annular ring 2 and about 1 two sides of shim body is nonmetallic Sealant 12 collectively forms " convex " the word sealant for surrounding shim body 1, also, annular ring 2 and about 1 two sides of shim body The gap d size between the nonmetallic sealant 12 of side is between 0.15mm, annular ring 2 and about 1 shim body at least within Gap between the nonmetallic sealant 12 of the side at least within of two sides can guarantee the state that self-sealing gasket is acted in high pressure Under, additional sealability can be provided to 2 relative distension of annular ring, to form the backup seal line of counter pressure, form two The compressive sealed protection mechanism of grade, substantially increases the service life of self-sealing gasket in this way.And annular ring 2 and nonmetallic sealant 12 be graphite, mica or polytetrafluoroethylene (PTFE).The nonmetallic sealant 12 and annular ring 2 are graphite, mica or polytetrafluoroethyl-ne Alkene, and nonmetallic sealant 12 and annular ring 2 can give the preferably ductility of shim body 1, additionally it is possible to bear serious heat It is swollen, so that the shim body 1 can adapt to the high temperature and high pressure environment of more intensity, avoided while reaching good sealing effect The surface of flange is damaged in high pressure occasion, it is preferable that the angle α range of tooth form groove 11 is 60 °~90 °, due to certainly Gasket seal can play jointly anti-squeeze in the state that high pressure acts on the tooth form groove 11 for being located at sealing surface middle section The effect of pressure, angle are preferably 70 °, which can be effectively ensured with preferable anti-extrusion ability, in addition, upper and lower two The tooth form groove 11 of side is all provided with the structure for being set to intermediate outwardly convex and then gradually inwardly falling after rise to both sides, accordingly, gasket sheet Then structure that the nonmetallic sealant 12 of about 1 two sides of body is also gradually inwardly fallen after rise in from intermediate outwardly convex to both sides, thus It is outer due to the shim body 1 so that the convex arc shaped structure that shim body 1 is thin in thick middle, both sides in the section of radial direction Side is equipped with a ring around the annular ring 2 of concentric arrays, so that self-sealing gasket and flange are presented, there are two types of the ways of contact, in this way When in use, the nonmetallic sealant 12 of two sides can first play sealing function to self-sealing gasket above and below sealing surface, and pad Tooth form groove 11 of the two sides up and down of piece ontology 1 need lower preload pressure, can effectively reduce work when gasket installation Amount；In addition when flange surface out-of-flatness, can compress gasket again, allow the annular concentric circle 2 of original non-stress (or few stress) Also it seals, has the characteristics that compensation sealing effect is strong.

Claims

1. a kind of self-sealing gasket, including shim body (1), both sides sealing face offers together the shim body (1) up and down The tooth form groove (11) of the heart, and tooth form groove (11) surface of the two sides is also covered with nonmetallic sealant (12), feature exists A ring is equipped with around the annular ring (2) of the concentric arrays in: the outside of the shim body (1), annular ring (2) Inside edge at least extends partially into the shim body (1).

2. self-sealing gasket according to claim 1, it is characterised in that: annular ring (2) and the shim body (1) The nonmetallic sealant (12) of upper and lower two sides collectively forms " convex " the word sealant for surrounding the shim body (1).

3. self-sealing gasket according to claim 2, it is characterised in that: in annular ring 2 and the shim body (1) Gap d size between the nonmetallic sealant (12) of the side at least within of lower two sides is between 0.1mm~0.2mm.

4. self-sealing gasket according to claim 3, it is characterised in that: annular ring (2) and nonmetallic sealant It (12) is graphite, mica or polytetrafluoroethylene (PTFE).

5. self-sealing gasket described in any one according to claim 1~4, it is characterised in that: the tooth form groove (11) Angle α range is 60 °~90 °.

6. self-sealing gasket according to claim 5, it is characterised in that: the tooth form groove (11) of the two sides up and down is all provided with It is set to intermediate outwardly convex and then the structure that gradually inwardly falls after rise to both sides, accordingly, the shim body (1) two sides up and down Then structure that nonmetallic sealant (12) is also gradually inwardly fallen after rise in from intermediate outwardly convex to both sides, so that the gasket Ontology (1) the convex arc shaped structure thin in thick middle, both sides in the section of radial direction.