CN201032034Y - Combined seal member for pipeline sealing - Google Patents
Combined seal member for pipeline sealing Download PDFInfo
- Publication number
- CN201032034Y CN201032034Y CNU2007200393311U CN200720039331U CN201032034Y CN 201032034 Y CN201032034 Y CN 201032034Y CN U2007200393311 U CNU2007200393311 U CN U2007200393311U CN 200720039331 U CN200720039331 U CN 200720039331U CN 201032034 Y CN201032034 Y CN 201032034Y
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- seal ring
- sealing
- seal
- sealing ring
- ring
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Abstract
The utility model discloses a combined seal used for sealing a pipeline, which relates to the mechanical sealing field; the combined seal consists of more than one sealing rings; the technical character is that: the sealing ring comprises three sealing rings with similar axis and different quality, which are an inner sealing ring, a middle sealing ring and an outer sealing ring, which are arranged in a radial mode. The axial thickness of the middle sealing ring is 0.1-5mm higher than that of the inner sealing ring and the outer sealing ring; the inner diameter and the outer diameter of the middle sealing ring are respectively matched with the outer diameter of the inner sealing ring and the inner diameter of the outer sealing ring; the matched modes respectively adopt a transition match or a small clearance match. The sealing faces of the inner sealing ring and the outer sealing ring are planes or arc planes; the sealing face of the middle sealing ring is a plane. The middle sealing ring is made of fluorin polyethylene or other soft sealing materials. The inner sealing ring and the outer sealing ring are made of pure aluminium, bronze or other hard sealing materials; the utility model provides a combined sealing element used for sealing the pipeline, which does not need to be molded and is convenient to be manufactured or installed.
Description
Technical field
The utility model relates to the mechanical sealing technology field, particularly relates to a kind of combination seal that is used for seal for pipe joints.
Background technique
Seal for pipe joints mainly contains end face seal, axial seal.The general sealant-coating that adopts of pipeline axial sealing guarantees sealability at the screw thread place that connects by sealer.The method of pipeline end face seal commonly used adopts the sealing compressive plane place fluting with joint, and Sealing is positioned over the fluting place, by the extruding of asking of joint and pipeline, forms the distortion of Sealing, thereby realizes sealing.O shape rubber washer is one of the most frequently used Sealing, but it is mainly used under the lower situation of pressure.Be higher than under the working condition more than the 2Mpa for pressure, adopt teflon gasket, red copper pad, steel plate washer etc. more; Polytetrafluoroethylmaterial material has advantages such as high-low temperature resistant, corrosion-resistant, good toughness, is present comparatively ideal sealing material, but its exist hardness big, wear no resistance, defectives such as mechanical strength is low, low temperature easy-cold flow, the easy creep of high temperature, use to be subjected to certain restriction; Metallic shims such as red copper pad or steel plate washer, because its hardness is big, amount of deformation is less, need carry out material softening and handle, and the surface roughness of sealed faying face is had relatively high expectations, and therefore for the sealing of having relatively high expectations under the high pressure conditions, implements difficulty.
By retrieval, utility model patent: seal for pipe joints coats pad (patent No. is 200420062583.2) with tetrafluoro, its technical characteristics is that a kind of seal for pipe joints coats pad with tetrafluoro, comprise nonmetal gasket ring and be coated on the tetrafluoro thin layer of its outer surface, the edge plane extension of nonmetal gasket ring is provided with outer projection formation hand and implements and concludes structure, described nonmetal gasket ring has two, is equipped with outer projection, accompanies elastic corrugated metal gasket ring between two metal rings.
The elastic corrugated metal gasket ring of this patent and the special construction of nonmetal gasket ring, though bring certain benefit for location and sealing, but because structure and making are all complicated, be unfavorable for single-piece work, need die sinking to make, in addition, the axial direction that coats between two nonmetal gasket rings that fill up at tetrafluoro in this patent accompanies elastic corrugated metal gasket ring, can increase the sealing resistance to pressure, but nonmetal gasket ring adopts asbestos, rubber or other sealing material, because less being not easy to of asbestos transformation amount contacts well with the sealing of asking of elastic corrugated metal gasket ring, and the rubber deformation amount is more greatly in not constraint of radial direction, so its sealing effect differs and reaches optimum surely.
Summary of the invention
At the deficiencies in the prior art, the utility model utilizes the self-characteristic of material that flexible barrier material, hard sealing material are organically combined, and provides a kind of die sinking that need not, the combination seal of being convenient to make, install that is used for seal for pipe joints.
Consider that single seal ring amount of deformation reaches the high advantage of combination seal sealing support strength more greatly, with the organic combination of the sealing material of two kinds of unlike materials, be about to the hard sealing material as outer support, flexible barrier material is as seal, adopt red copper or fine aluminium as the hard sealing material, teflon is as flexible barrier material, by such being used in combination, when combination seal is squeezed, soft seal produces distortion, fill between itself and the valve body, and the gap between the inside and outside hard seal ring, when crushing strength arrives to a certain degree, inside and outside hard seal ring also begins to produce distortion, has increased deformation resistance and extrusion friction power, prevents that soft seal ring amount of deformation is excessive; It not only can retrain rheology distortion of polytetrafluoroethylmaterial material this combination seal, prevents also that the teflon amount of deformation is excessive and makes sealability lose efficacy.
The utility model is achieved through the following technical solutions:
A kind of combination seal that is used for seal for pipe joints is made of an above seal ring, it is characterized in that: described seal ring comprises three coaxial heterogeneous inner seal rings that radially are provided with, middle seal ring, exterior seal ring, the axial thickness of seal ring compares inner seal ring in described, the axial thickness of exterior seal ring is high 0.1～5 millimeter, and in the middle seal ring, external diameter cooperates the employing transition fit respectively or asks that for a short time the crack cooperates with inner seal ring external diameter and exterior seal ring internal diameter, described inner seal ring, the sealing surface of exterior seal ring is plane or cambered surface, the sealing surface of seal ring is the plane in described, middle seal ring is made inner seal ring with teflon or other flexible barrier material, the exterior seal ring fine aluminium, red copper or other hard sealing material are made.
When being applied to seal for pipe joints, combination seal is placed in the circular groove of sealing in conjunction with end face of pipeline, when combination seal is subjected to rotation extruding or translation extruding,, promptly can be extruded and fixed securely between inner seal ring and exterior seal ring because seal ring produces distortion in soft.
The utility model combination seal is not only applicable to rotate extrusion-deformation seal operation state, and is applicable to translation crush seal working state.
The utility model combination seal is applicable to the sealing of pipeline, valve, instrument under air pressure, the hydraulic work state.
The beneficial effects of the utility model are:
1. the utility model combination seal has adopted the structure of seal ring in the inside and outside seal ring folder, and the hardness of inside and outside seal ring is higher than middle seal ring, inside and outside like this seal ring not only centering seal ring plays a supportive role, limited middle seal ring distortion, and when combination seal is squeezed, increase frictional force, overcome the cold flow properties of polytetrafluoroethylmaterial material, also improved the wear resistance of Sealing.
2. the axial thickness of the described middle seal ring of the utility model combination seal is higher 0.1～5 millimeter than the axial thickness of inside and outside seal ring, and middle seal ring adopts teflon or other flexible barrier material to make, inside and outside seal ring adopts fine aluminium, red copper or other hard sealing material to be made, and therefore can reduce the startup work surface friction drag of combination seal.
3. transition fit or little Spielpassung are adopted with inner seal ring external diameter and exterior seal ring internal diameter respectively in the inside and outside footpath of the described middle seal ring of the utility model combination seal, internally,, the diameter dimension and the shape need of exterior seal ring be not high, therefore in, in, exterior seal ring can adopt the machining mode of single-piece to be made, do not need die sinking, make, install very easy.
Description of drawings
Fig. 1: the utility model combination seal structural representation.
Fig. 2: the utility model is applied in the mounting type schematic representation of outside thread pipeline.
Fig. 3: the utility model is applied in the mounting type schematic representation of internal thread pipeline.
Number in the figure: 1 inner seal ring, seal ring in 2,3 exterior seal rings, 4 outside thread pipelines, 5 combination seals, 6 valve bodies, 7 internal thread pipelines.
Embodiment
As shown in Figure 1: a kind of combination seal of seal for pipe joints that is used for is by three coaxial heterogeneous inner seal rings 1 that radially are provided with, middle seal ring 2, exterior seal ring 3 is formed, the axial thickness of middle seal ring 2 is than inner seal ring 1, exterior seal ring 3 axial thicknesss are high 0.1～5 millimeter, in the soft middle seal ring 2, external diameter cooperates employing transition fit or little Spielpassung with inner seal ring 1 external diameter and exterior seal ring 3 internal diameters, inner seal ring 1, the sealing surface of exterior seal ring 3 is plane or cambered surface, the sealing surface of middle seal ring 2 is the plane, middle seal ring 2 is made inner seal ring 1 by teflon or other flexible barrier material, exterior seal ring 3 is by fine aluminium, red copper or other hard sealing material are made.
When being applied to seal for pipe joints, combination seal is placed in the circular groove of sealing in conjunction with end face of pipeline, when combination seal is subjected to rotation extruding or translation extruding,, promptly can be extruded and fixed securely between inner seal ring 1 and exterior seal ring 3 because seal ring 2 produces distortion in soft.
The utility model combination seal is not only applicable to rotate extrusion-deformation seal operation state, and is applicable to translation crush seal working state.
The utility model combination seal is applicable to the sealing of pipeline, valve, instrument under air pressure, the hydraulic work state.
As shown in Figure 2: the utility model combination seal 5 is applied in the mounting type schematic representation of outside thread pipeline 4, the sealing of threaded tube 4 is in conjunction with slotting on the end face outside, the width of notch is slightly larger than the width of combination seal 5, the degree of depth does not need too dark, only combination seal 5 can need be installed in the circular groove to get final product; When outside thread pipeline 4 pushes combination seal 5 with valve body 6 by screw thread, the middle seal ring 2 of combination seal 5 produces distortion, and fully be filled between the gap and inner seal ring 1 and exterior seal ring 3 of valve body 6, outside thread pipeline 4, can stop pressurized gas or liquid in the pipeline to overflow, play seal action to the external world; In the middle of seal ring 2 when producing a certain amount of distortion; as continue to screw outside thread pipeline 4 to a certain degree the time; inner seal ring 1, exterior seal ring 3 produce friction with the seal groove of outside thread pipeline 4; at this moment the material production of hard inner seal ring 1, exterior seal ring 3 distortion; fill and be squeezed in the seal groove of outside thread pipeline 4; so not only certain sealing effect can be arranged, can also prevent that soft middle seal ring 2 material deformation amounts are excessive, play the effect of seal ring 2 in the protection.
As shown in Figure 3: the utility model combination seal 5 is applied in the mounting type schematic representation of internal thread pipeline 7, slot in the sealing of internal thread pipeline 7 in conjunction with end face, the width of notch is slightly larger than the width of combination seal 5, the degree of depth does not need too dark, only combination seal 5 can need be installed in the circular groove to get final product; When internal thread pipeline 7 pushes combination seal 5 with valve body 6 by screw thread, the middle seal ring 2 of combination seal 5 produces distortion, and fully be filled between valve body 6 gaps and inner seal ring 2 and the exterior seal ring 1, stop pressurized gas or liquid in the pipeline to overflow like this, play seal action to the external world; In the middle of seal ring 2 when producing a certain amount of distortion; as continue to screw outside thread pipeline 4 to a certain degree the time; exterior seal ring 3 and the seal groove generation friction of inner seal ring 1 with internal thread pipeline 7; at this moment the material of hard inner seal ring 1, exterior seal ring 3 will produce distortion; fill and be squeezed in the seal groove of internal thread pipeline 7; this not only can have certain sealing effect, can also prevent that soft middle seal ring 2 material deformation amounts are excessive, plays the effect of seal ring 2 in the protection.
Claims (4)
1. a combination seal that is used for seal for pipe joints is made of an above seal ring, it is characterized in that: described seal ring comprises three coaxial heterogeneous inner seal rings (1) that radially are provided with, middle seal ring (2), exterior seal ring (3), the axial thickness of seal ring (2) is greater than inner seal ring (1) in described, the axial thickness of exterior seal ring (3), in the middle seal ring (2), external diameter adopts transition fit or little Spielpassung with inner seal ring (1) external diameter and exterior seal ring (3) internal diameter respectively, described inner seal ring (1), exterior seal ring (3) is made of the hard sealing material, and described middle seal ring (2) is made of flexible barrier material.
2. as claims 1 described a kind of combination seal that is used for seal for pipe joints, it is characterized in that: the axial thickness of seal ring (2) is greater than 0.1～5 millimeter of the axial thickness of inner seal ring (1), exterior seal ring (3) in described.
3. as claims 1 described a kind of combination seal that is used for seal for pipe joints, it is characterized in that: the sealing surface of described inner seal ring (1), exterior seal ring (3) is plane or cambered surface, and the sealing surface of middle seal ring (2) is the plane.
4. as claims 1 described a kind of combination seal that is used for seal for pipe joints, it is characterized in that: the hard sealing material of described making inner seal ring (1), exterior seal ring (3) usefulness is fine aluminium, red copper, and the flexible barrier material of seal ring in the making (2) usefulness is a teflon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200393311U CN201032034Y (en) | 2007-06-02 | 2007-06-02 | Combined seal member for pipeline sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200393311U CN201032034Y (en) | 2007-06-02 | 2007-06-02 | Combined seal member for pipeline sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201032034Y true CN201032034Y (en) | 2008-03-05 |
Family
ID=39163925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200393311U Expired - Fee Related CN201032034Y (en) | 2007-06-02 | 2007-06-02 | Combined seal member for pipeline sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201032034Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401133A (en) * | 2011-11-28 | 2012-04-04 | 苏州宝骅机械技术有限公司 | Sealing gasket |
| CN102518890A (en) * | 2011-12-20 | 2012-06-27 | 苏州宝骅机械技术有限公司 | Seal gasket for flange face sealing |
| CN102664048A (en) * | 2012-03-23 | 2012-09-12 | 宁波天生密封件有限公司 | Metal graphite o-shaped ring |
| CN102903550A (en) * | 2011-07-28 | 2013-01-30 | 上海日立电器有限公司 | Junction box cover gasket for fixing thermal switch |
| CN103277608A (en) * | 2013-06-14 | 2013-09-04 | 苏州柏德纳科技有限公司 | Connecting pipe |
| CN104121439A (en) * | 2014-07-14 | 2014-10-29 | 洛阳能源密封件有限公司 | Soft-hard combined sealing device |
| CN105730675A (en) * | 2014-12-30 | 2016-07-06 | 空中客车运营简化股份公司 | Joint Assembly And Method Connecting An Aircraft Belly Fairing To The Fuselage Provided With A Particularly Positioned Stringer |
| 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 |
| CN112491207A (en) * | 2019-09-10 | 2021-03-12 | 大众汽车股份公司 | Electric drive and method for producing an electric drive |
-
2007
- 2007-06-02 CN CNU2007200393311U patent/CN201032034Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102903550A (en) * | 2011-07-28 | 2013-01-30 | 上海日立电器有限公司 | Junction box cover gasket for fixing thermal switch |
| CN102401133A (en) * | 2011-11-28 | 2012-04-04 | 苏州宝骅机械技术有限公司 | Sealing gasket |
| CN102518890A (en) * | 2011-12-20 | 2012-06-27 | 苏州宝骅机械技术有限公司 | Seal gasket for flange face sealing |
| CN102664048A (en) * | 2012-03-23 | 2012-09-12 | 宁波天生密封件有限公司 | Metal graphite o-shaped ring |
| CN102664048B (en) * | 2012-03-23 | 2015-02-18 | 宁波天生密封件有限公司 | Metal graphite o-shaped ring |
| CN103277608A (en) * | 2013-06-14 | 2013-09-04 | 苏州柏德纳科技有限公司 | Connecting pipe |
| CN104121439A (en) * | 2014-07-14 | 2014-10-29 | 洛阳能源密封件有限公司 | Soft-hard combined sealing device |
| CN105730675A (en) * | 2014-12-30 | 2016-07-06 | 空中客车运营简化股份公司 | Joint Assembly And Method Connecting An Aircraft Belly Fairing To The Fuselage Provided With A Particularly Positioned Stringer |
| 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 |
| CN112491207A (en) * | 2019-09-10 | 2021-03-12 | 大众汽车股份公司 | Electric drive and method for producing an electric drive |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080305 Termination date: 20150602 |
|
| EXPY | Termination of patent right or utility model |