CN201875131U - Self-tightening metal gasket - Google Patents
Self-tightening metal gasket Download PDFInfo
- Publication number
- CN201875131U CN201875131U CN201020594155XU CN201020594155U CN201875131U CN 201875131 U CN201875131 U CN 201875131U CN 201020594155X U CN201020594155X U CN 201020594155XU CN 201020594155 U CN201020594155 U CN 201020594155U CN 201875131 U CN201875131 U CN 201875131U
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- CN
- China
- Prior art keywords
- self
- metallic shim
- metal sheets
- self tightening
- tinsel
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a self-tightening metal gasket, which belongs to sealing gaskets for connecting mechanical equipment and a pipeline. The utility model discloses a metal group formed by overlapping two annular metal sheets whose peripheral edges are welded together. The self-tightening metal gasket has the characteristic of pressure self-sealing, and has greatly-improved sealing performance in comparison with the conventional metal sealing gasket.
Description
Technical field
The utility model relates to machinery and connects with pipeline and use gasket seal, particularly the self tightening metallic packing.
Background technique
In the flange of existing various machinery or pipeline connects, in order to reach the purpose that sealing is not leaked, usually need to use various such as flat metallic gasket, dentiform gasket etc. as Sealing.Existing these pads all belong to " forced seal " on sealing principle.That is to say that the pad that is placed between the flange forms compressive stres or claims pad stress by tightening attachment bolt pad being compressed on pad.When compressive stres reached the required stress of gasket seal, the flange connection place will reach sealing and not leak.If the bolt force of tension flange is because a variety of causes is unfavorable for the situation of compress gasket,, all may makes the sealability decline of connection place even leak perhaps because other reasons reduces the stress of pad.For example, in general flange connected, pad was installed the pretension of back by attachment bolt, has formed certain compressive stres or title pad stress on pad.After equipment or pipe-line system came into operation, its interior media pressure can raise gradually, until the desired pressure of the system that reaches.When there was pressure in system, the axial force of pressure formation can make bolt force and pad stress in the flange connection change thus.Bolt force raises with the rising of interior pressure, and pad stress then reduces with the rising of interior pressure.Under identical flange join condition, the minimizing of the rising of bolt force and pad stress mainly depend on in the material and the structural characteristics of pad.When pad stress is reduced to less than the required stress of gasket seal, connect and to reach sealing.
Summary of the invention
The purpose of this utility model provides a kind of self tightening metallic shim with pressure selfsealings characteristic, thereby improves its sealability greatly.
The technical solution of the present utility model tinsel group that to be the self tightening metallic shim linked together and constituted by its outer periphery fusions of tinsel of two annulars that are superimposed together.
The outer surface of above-described two metal sheets can be a burnishing surface.
The cross section of two metal sheets of the present utility model can be corrugated.
The outer surface of two metal sheets of the present utility model can be provided with some annular concentric grooves.
The sectional shape of above-described annular concentric groove can be pointed shape or arc.
The configuration of the annular concentric groove on the outer surface of two metal sheets of the present utility model can be relative or interlace.
Working principle of the present utility model is: the same with other pads, the self tightening metallic shim is placed between the two coupled flanges in flange connects.When the pretension flange, the self tightening metallic shim is compressed and form corresponding impacting force pad stress at gasket surface by tightening attachment bolt.The sealing of flange connection place is not leaked.Under serviceability, though the same with existing flange connection, behind the pressure medium access arrangement, can form corresponding axial force, this axial force can make bolt force and the pad stress in the flange connection all can change.Bolt force can raise along with interior voltage rise height, and pad stress then reduces with interior voltage rise is high.But meanwhile, pressure medium can penetrate into the micro gap between the tinsel of self tightening metallic shim.Because the outer periphery of the tinsel that is superimposed together is welded together fully closely, so medium can not let out from here.The pressure that enters the micro gap place acts on the inboard of tinsel, makes two metal sheets outwards press to corresponding flanged surface respectively, thereby forms additional pad stress between self tightening metallic shim outer surface and flanged surface.This additional pad stress can reach pressure medium.Because the existence of additional pad stress makes originally the pad stress that reduces because of pressure rising or other reasons be compensated, thereby its sealability also just is better than existing other common metal pads.Because additional pad stress is to be formed by the pressure medium in machinery or the pipe-line system, pressure medium is high more, and additional pad stress is also big more, and sealing also just is guaranteed easily.This shows that the self tightening metallic shim has the self-packing characteristic of pressure, thereby it is a kind of novel " pressure selfsealings " metallic shim that is different from existing " forced seal " metallic shim.
The utility model has the advantages that the self tightening metallic shim has pressure selfsealings characteristic, intrasystem pressure medium is high more, and its sealability is good more, causes the deficiency that sealability reduces because of intrasystem pressure medium raises thereby overcome existing metallic shim.
Description of drawings
Fig. 1 is an organigram of the present utility model;
Fig. 2 is the outer surface belt arcuate furrow of two metal sheets of the present utility model and the structural representation of the configuration that interlaces;
Fig. 3 is the outer surface belt arcuate furrow of two metal sheets of the present utility model and the structural representation that disposes relatively;
Fig. 4 is the outer surface belt pointed shape groove of two metals of the present utility model and the structural representation of the configuration that interlaces;
Fig. 5 is the outer surface belt pointed shape groove of two metal sheets of the present utility model and the structural representation that disposes relatively;
Fig. 6 is the structural representation of band bellows-shaped tinsel of the present utility model.
Embodiment
As shown in Figure 1, the utility model self tightening metallic shim is superimposed together by the tinsel 1 and the tinsel 2 of the annular of surfacing, and tinsel 1 and tinsel 2 usefulness carbon steels or stainless steel are made, and also available other metallic material are made.3 places, outer periphery at tinsel 1 and tinsel 2 fully closely fuse together by the outer periphery of welding method with two tinsels, and formed small interior slit 4, the superimposed back of two metal sheets can't be communicated with the external world by 3 places, outer periphery of melting welding.
In order to reduce area that the self tightening metallic shim contacts with flange surface to improve its contact stress, the outer surface of the two metal sheets of self tightening metallic shim can also be processed 5 annular concentric grooves, the sectional shape of groove can be a pointed shape, arc or other shapes, and the groove of the outer surface of two metal sheets can be configured to relative or interlace.In order to improve the compression recovery performance of self tightening metallic shim, the two metal sheets of self tightening metallic shim can be processed into corrugated.
As shown in Figure 2, the outer surface of the two metal sheets of self tightening metallic shim is processed with arcuate furrow and interlaces configuration.
As shown in Figure 3, the outer surface of the two metal sheets of self tightening metallic shim is processed with arcuate furrow and configuration relatively.
As shown in Figure 4, the outer surface of the two metal sheets of self tightening metallic shim is processed with the pointed shape groove and the configuration that interlaces.
As shown in Figure 5, the outer surface of the two metal sheets of self tightening metallic shim is processed with pointed shape groove and configuration relatively.
In order to improve the compression recovery performance of self tightening metallic shim, the two metal sheets of self tightening metallic shim can be processed into corrugated.
As shown in Figure 6, tinsel 1 and tinsel 2 are processed into bellows-shaped respectively, superimposed then it closely being fused together by welding method at its 3 places, outer periphery, slit 4 in superimposed back form between corrugated tinsel 1 and tinsel 2 small.
Claims (6)
1. the self tightening metallic shim is characterized in that fusing the tinsel group that links together and constitute by its outer periphery of tinsel of two annulars that are superimposed together.
2. self tightening metallic shim according to claim 1, the outer surface that it is characterized in that described two metal sheets is a burnishing surface.
3. self tightening metallic shim according to claim 1, the cross section that it is characterized in that described two metal sheets is corrugated.
4. self tightening metallic shim according to claim 2 is characterized in that described two metal sheets outer surface is provided with some annular concentric grooves.
5. self tightening metallic shim according to claim 4, the sectional shape that it is characterized in that described annular concentric groove is a pointed shape, or arc.
6. self tightening metallic shim according to claim 4 is characterized in that described annular concentric groove is relative in the configuration of the outer surface of two metal sheets, or interlace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020594155XU CN201875131U (en) | 2010-11-05 | 2010-11-05 | Self-tightening metal gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020594155XU CN201875131U (en) | 2010-11-05 | 2010-11-05 | Self-tightening metal gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201875131U true CN201875131U (en) | 2011-06-22 |
Family
ID=44163048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020594155XU Expired - Lifetime CN201875131U (en) | 2010-11-05 | 2010-11-05 | Self-tightening metal gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201875131U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062541A (en) * | 2013-01-29 | 2013-04-24 | 艾志（南京）环保管接技术股份有限公司 | Metal gasket with fishbone-shaped section and inclined teeth |
| CN103807440A (en) * | 2014-03-13 | 2014-05-21 | 茂名重力石化机械制造有限公司 | Self-tightening type sealing gasket for sealing asymmetric structure |
-
2010
- 2010-11-05 CN CN201020594155XU patent/CN201875131U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062541A (en) * | 2013-01-29 | 2013-04-24 | 艾志（南京）环保管接技术股份有限公司 | Metal gasket with fishbone-shaped section and inclined teeth |
| CN103807440A (en) * | 2014-03-13 | 2014-05-21 | 茂名重力石化机械制造有限公司 | Self-tightening type sealing gasket for sealing asymmetric structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110622 |