CN204611153U - A kind of flange sealing structure that effectively can reduce leak-down rate - Google Patents
A kind of flange sealing structure that effectively can reduce leak-down rate Download PDFInfo
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- CN204611153U CN204611153U CN201520075032.8U CN201520075032U CN204611153U CN 204611153 U CN204611153 U CN 204611153U CN 201520075032 U CN201520075032 U CN 201520075032U CN 204611153 U CN204611153 U CN 204611153U
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Abstract
The utility model discloses a kind of flange sealing structure that effectively can reduce leak-down rate, comprise female flange, face-flange, bolt, spring washer, nut, one of described female flange, face-flange end face is plane, and other end is convex surface; The convex surface of described female flange docks with the convex surface of face-flange; Between described female flange and face-flange, packing is set; The convex surface of described female flange arranges annular groove; Described packing coordinates with the annular groove on the convex surface of female flange; The degree of depth of annular groove on the convex surface that the thickness of described packing is greater than female flange.The utility model adopts packing sealing structure, namely on the convex surface of a face-flange, arranges groove, arranges packing in groove, connection is not tightly leaked.When the utility model is used for large diameter flange seal, more can demonstrate its superiority.The utility model structure is simple, cheap, installs easily, uses reliable, effectively can reduce flange leakage.
Description
Technical field
The utility model belongs to pipeline and valve interconnection technique field, belongs to flange and technical field of sealing technology further, is specifically related to a kind of structure simply, cheap, installs easily, uses reliable, effectively can reduce the flange sealing structure of leak-down rate.
Background technique
Flange is again flange plate or bead, is to make pipe and the interconnective strength member of pipe, is connected to pipe end.Perforation on flange, can wear bolt, two flanges is close to, uses liner containment between flange.Flange connect is made up of a pair flange, a pad and several bolt and nuts.Pad is placed between two flange facings, and after fastening nut, the pressure on gasket surface produces distortion after reaching certain numerical value, and fills up uneven place on sealing surface, and connection is not tightly leaked.The flange sealing structure of prior art, the pattern of its flange facing has three kinds: plane sealing surface, is applicable to the occasion that pressure is not high, medium is nontoxic; Male-female seal contact face, is applicable to the occasion that pressure is slightly high; Tongue and groove seal contact face, is applicable to inflammable, explosive, poisonous medium and the higher occasion of pressure.Pad a kind ofly can produce plastic deformation and the annulus made of the material with some strength.In existing pipeline connection, valve connect, substantially be seal by asbestos washer or spiral wound gasket, this kind of sealing configuration is being installed and used with in maintenance process, often there will be install badly to leak, asbestos washer is difficult to the shortcomings such as cleaning, the fugitive damage of metallic shim after using; Meanwhile, metallic shim and other pad cost higher, user cost is high, have impact on the economic benefit of enterprise.For this reason, research and develop a kind of structure simple, cheap, install easily, use reliable, the flange sealing structure that effectively can reduce leak-down rate is the key addressed this problem.
Model utility content
It is simple, cheap that the purpose of this utility model is to provide a kind of structure, installs easily, uses reliable, effectively can reduce the flange sealing structure of leak-down rate.
The purpose of this utility model is achieved in that and comprises female flange, face-flange, bolt, spring washer, nut, and one of described female flange, face-flange end face is plane, and other end is convex surface; The convex surface of described female flange docks with the convex surface of face-flange; Between described female flange and face-flange, packing is set; The convex surface of described female flange arranges annular groove; Described packing coordinates with the annular groove on the convex surface of female flange; The degree of depth of annular groove on the convex surface that the thickness of described packing is greater than female flange.
The utility model adopts packing sealing structure, namely groove is set on the convex surface of a face-flange, in groove, packing is set, the thickness of packing is greater than the degree of depth of groove, when tightening the nut of flange bolt, pressure on packing surface produces distortion after reaching certain numerical value, and fills up uneven place on convex surface, and connection is not tightly leaked.The thickness of packing is greater than the degree of depth of groove, ensure that packing is after stress deformation, still has gap between the convex surface of two flanges, thus ensure that sealing effect.The utility model adopts packing_seal to replace traditional asbestos packing sealing, simplifies assembly technology, installs, safeguards easily, reduce the labor intensity of workman, decrease leak-down rate; Meanwhile, packing is cheap, and user cost is low, improves the economic benefit of enterprise; When the utility model is used for large diameter flange seal, more can demonstrate its superiority.The utility model structure is simple, cheap, installs easily, uses reliable, effectively can reduce flange leakage.
Accompanying drawing explanation
Fig. 1 is the utility model overall structure relation schematic diagram;
Fig. 2 is the band seal groove flange schematic front view of the utility model;
Fig. 3 is the A-A cross-sectional schematic of Fig. 2;
Fig. 4 is the packing schematic front view of the utility model;
1-female flange, 2-face-flange, 3-packing, 4-bolt, 5-spring washer, 6-nut.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, but limited the utility model never in any form, and any conversion done based on the utility model training centre or improvement, all fall into protection domain of the present utility model.
As shown in figures 1-4, comprise female flange 1, face-flange 2, bolt 4, spring washer 5, nut 6, one of described female flange 1, face-flange 2 end face is plane, and other end is convex surface; The convex surface of described female flange 1 docks with the convex surface of face-flange 2; Between described female flange 1 and face-flange 2, packing 3 is set; The convex surface of described female flange 1 arranges annular groove; Described packing 3 coordinates with the annular groove on the convex surface of female flange 1; The degree of depth of annular groove on the convex surface that the thickness of described packing 3 is greater than female flange 1.
Gap between the convex surface of described female flange 1 and the convex surface of face-flange 2 is 1 ~ 3mm.
The circle center of the annular groove on the convex surface of described female flange 1 is consistent with the circle center of convex surface.
On the convex surface of described female flange 1, the width of annular groove is 1/2 of land width.
On the convex surface of described female flange 1, the degree of depth of annular groove is 1/2 ~ 2/3 of annular groove width.
The rectangular shape of cross section of described packing 3, rectangle width is consistent with the width of annular groove on the convex surface of female flange 1, the degree of depth 2 ~ 5mm of annular groove on the convex surface that rectangular elevation is greater than female flange 1.
Described packing 3 is non-metallic body, and its joint is overlap joint type.
The overlap joint angle of the joint of described packing 3 is 25 ° ~ 35 °.
During the sealing of described packing 3 for steam line, adopt graphite body.
During the sealing of described packing 3 for non-steam pipeline, adopt asbestos bodies.
working principle of the present utility model and working procedure:
The utility model adopts packing 3 sealing configuration, namely groove is set on the convex surface of a face-flange, packing 3 is set in groove, the thickness of packing 3 is greater than the degree of depth of groove, when tightening the nut of flange bolt, pressure on packing 3 surface produces distortion after reaching certain numerical value, and fills up uneven place on convex surface, and connection is not tightly leaked.The thickness of packing 3 is greater than the degree of depth of groove, ensure that packing 3 is after stress deformation, still has gap between the convex surface of two flanges, thus ensure that sealing effect.The utility model adopts packing 3 to seal the traditional asbestos packing sealing of replacement, simplifies assembly technology, installs, safeguards easily, reduce the labor intensity of workman, decrease leak-down rate.
Claims (10)
1. one kind effectively can be reduced the flange sealing structure of leak-down rate, comprise female flange (1), face-flange (2), bolt (4), spring washer (5), nut (6), one of described female flange (1), face-flange (2) end face is plane, and other end is convex surface; The convex surface of described female flange (1) docks with the convex surface of face-flange (2); It is characterized in that: between described female flange (1) and face-flange (2), packing (3) is set; The convex surface of described female flange (1) arranges annular groove; Described packing (3) coordinates with the annular groove on the convex surface of female flange (1); The degree of depth of annular groove on the convex surface that the thickness of described packing (3) is greater than female flange (1).
2. the flange sealing structure that effectively can reduce leak-down rate according to claim 1, is characterized in that: the gap between the convex surface of described female flange (1) and the convex surface of face-flange (2) is 1 ~ 3mm.
3. the flange sealing structure that effectively can reduce leak-down rate according to claim 1, is characterized in that: the circle center of the annular groove on the convex surface of described female flange (1) is consistent with the circle center of convex surface.
4. the flange sealing structure that effectively can reduce leak-down rate according to claim 1, is characterized in that: on the convex surface of described female flange (1), the width of annular groove is 1/2 of land width.
5. the flange sealing structure that effectively can reduce leak-down rate according to claim 4, is characterized in that: on the convex surface of described female flange (1), the degree of depth of annular groove is 1/2 ~ 2/3 of annular groove width.
6. the flange sealing structure that effectively can reduce leak-down rate according to claim 1, it is characterized in that: the rectangular shape of cross section of described packing (3), rectangle width is consistent with the width of annular groove on the convex surface of female flange (1), the degree of depth 2 ~ 5mm of annular groove on the convex surface that rectangular elevation is greater than female flange (1).
7. the flange sealing structure that effectively can reduce leak-down rate according to claim 1, is characterized in that: described packing (3) is non-metallic body, and its joint is overlap joint type.
8. the flange sealing structure that effectively can reduce leak-down rate according to claim 7, is characterized in that: the overlap joint angle of the joint of described packing (3) is 25 ° ~ 35 °.
9. the flange sealing structure that effectively can reduce leak-down rate according to claim 1, is characterized in that: during the sealing of described packing (3) for steam line, adopts graphite body.
10. the flange sealing structure that effectively can reduce leak-down rate according to claim 1, is characterized in that: during the sealing of described packing (3) for non-steam pipeline, adopts asbestos bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520075032.8U CN204611153U (en) | 2015-02-03 | 2015-02-03 | A kind of flange sealing structure that effectively can reduce leak-down rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520075032.8U CN204611153U (en) | 2015-02-03 | 2015-02-03 | A kind of flange sealing structure that effectively can reduce leak-down rate |
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| Publication Number | Publication Date |
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| CN204611153U true CN204611153U (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520075032.8U Active CN204611153U (en) | 2015-02-03 | 2015-02-03 | A kind of flange sealing structure that effectively can reduce leak-down rate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626866A (en) * | 2016-03-18 | 2016-06-01 | 西安航天华阳机电装备有限公司 | Sealing sphere flange structure tool provided with sealing groove structure |
| CN108361379A (en) * | 2017-12-29 | 2018-08-03 | 中国船舶工业集团公司第七0八研究所 | A kind of non-round flange face cone type fluid seals technology of large size |
| CN109237167A (en) * | 2018-11-05 | 2019-01-18 | 中国航空工业集团公司西安飞机设计研究所 | A kind of flange sealing structure |
| JP2022090433A (en) * | 2020-12-07 | 2022-06-17 | 株式会社ティエフシー | Piping heat insulation material |
-
2015
- 2015-02-03 CN CN201520075032.8U patent/CN204611153U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626866A (en) * | 2016-03-18 | 2016-06-01 | 西安航天华阳机电装备有限公司 | Sealing sphere flange structure tool provided with sealing groove structure |
| CN108361379A (en) * | 2017-12-29 | 2018-08-03 | 中国船舶工业集团公司第七0八研究所 | A kind of non-round flange face cone type fluid seals technology of large size |
| CN109237167A (en) * | 2018-11-05 | 2019-01-18 | 中国航空工业集团公司西安飞机设计研究所 | A kind of flange sealing structure |
| CN109237167B (en) * | 2018-11-05 | 2021-05-07 | 中国航空工业集团公司西安飞机设计研究所 | Flange sealing structure |
| JP2022090433A (en) * | 2020-12-07 | 2022-06-17 | 株式会社ティエフシー | Piping heat insulation material |
| JP7390725B2 (en) | 2020-12-07 | 2023-12-04 | 株式会社ティエフシー | Piping insulation material |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |