CN102494210B - Flange joint - Google Patents
Flange joint Download PDFInfo
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- CN102494210B CN102494210B CN201110388265.XA CN201110388265A CN102494210B CN 102494210 B CN102494210 B CN 102494210B CN 201110388265 A CN201110388265 A CN 201110388265A CN 102494210 B CN102494210 B CN 102494210B
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Abstract
The invention discloses a flange joint, which comprises two joint bodies, two flange bodies and a seal ring, wherein the end faces of the two joint bodies are opposite; a circular hole is arranged at the middle in the axial direction of each joint body; a boss is arranged in the direction of the outer circumference of the joint body; the bosses are near the respective end faces of the two joint bodies; a ring groove is arranged between the two joint bodies; a seal element is arranged in the ring groove; the end faces of the two flange bodies are opposite; the middles of the two flange bodies are respectively provided with a circular hole; annular locking grooves matched with the bosses are arranged in the circular holes; the bosses of the two joint bodies are locked in the locking grooves of the two flange bodies; the two flange bodies are fixed together through a connecting piece; the joint bodies are provided with a plurality of vent grooves for enabling the circular holes to be communicated with the ring groove; the cross section of the seal ring is in a stepped E shape; the seal ring comprises a ring body, a big outer ring surface and a small outer ring surface; the inner side of the ring body is provided with a gap extending along the circumferential direction; the big outer ring surface and the small outer ring surface are respectively formed at both sides in the circumferential direction of the gap; and the radial width of the big outer ring surface is greater than that of the small outer ring surface. In the flange joint disclosed by the invention, when the seal dual face of the joint deforms or a fastener looses to generate an abnormal seal, under the pressure of seal gas, extending deformation is generated on a seal layer to form a new seal at the position of a sealed gap, and thereby, an effect of automatic seal compensation is achieved.
Description
Technical field
The present invention relates to the flanged joint that a kind of railway freight-car connects braking air pipe, the joint that especially the pressed gas line seal connects.
Background technique
The structural type of flanged joint is of all kinds, and most joints are all guaranteeing that sealing configuration meets " passive " sealing under Design and manufacture, maintenance requirement prerequisite, must keep joint inner seal ring lower essential compressibility in working order.Once because of installation question or the loosening compressibility that causes is installed and reduces, the joint sealing effect will reduce, airtight for the sealing difficulty maximum, this phenomenon is more remarkable.Once in use joint sealing lost efficacy, will cause leakage, as its air damping piping of railway freight-car of moving on China's circuit due to the impact installing and using the aspects such as maintenance, sew ubiquity, particularly at the cold area of China, be insurmountable problem for a long time, had a strong impact on safety of railway traffic.
Number of patent application is 200820062412.8, notification number is CN201162820Y, the day for announcing is on December 10th, 2008, name is called " elastic seal ring " and discloses a kind of seal ring, its accompanying drawing 3,4,5 discloses the structure of flanged joint, the deficiency that its technological scheme exists is: when installation conditions meets design requirement, " E " shape seal ring is packed into after the flange corresponding site, because fittings body is to be rigidly connected, make seal ring be compacted, " E " shape circle is compressed, and shape has become " rectangle " rubber gasket.At the sealing dual face, because of installation question, flange body, deform or clamping bolt is loosening causes installing while producing gap, pressed gas enters between two fittings body gaps, and can not enter vent slot, therefore pressure air can only be exerted pressure to upper lip, make seal ring and fittings body produce gap and produce a large amount of leakages, cause as can be seen here flanged joint to reveal to be mainly the design irrationality due to seal ring and fittings body to cause.
Summary of the invention
The objective of the invention is, for overcoming above-mentioned the deficiencies in the prior art, provides a kind of flanged joint, and this is rational in infrastructure, easy to use, cost is low, sealing is reliable.
For achieving the above object, the present invention adopts following technical proposals:
A kind of flanged joint, it comprises two fittings bodies, two flange bodies; Described two its end faces of fittings body relatively, axially centre has circular port, the excircle direction is established boss, and this boss is near its end face separately, be provided with annular groove between two fittings bodies, Sealing is installed in annular groove, described two its end faces of flange body are relative, centre has circular hole, are provided with the annular slot matched with described boss in circular hole; The boss of two fittings bodies is stuck in the draw-in groove of two flange bodies, and two flange bodies are fixed together by link, and described fittings body is provided with several vent slots that is communicated with circular port and annular groove.
The end face that fittings body is relative is smooth plane; The circular port axially middle inboard away from its end face is provided with the groove for pipe laying, makes circular port section vertically form boss-shaped.The excircle direction of fittings body is processed into the double polarizing keys shape.
Described flange body, for connecting the structural member of two fittings bodies, has three circular holes, and middle circular hole is for passing through fittings body, and all the other two holes are for carrying out the circular hole of fastening body and rubber seal by bolt.
Described annular groove is located on the end face of one of them fittings body.This joint physical efficiency well plays the good result to rubber seal 3 interior gap inflation.
Described Sealing is seal ring.
Described vent slot is equally distributed 4, and adjacent two vent slots become 90 °.Vent slot facilitates gas to fill wind by vent slot to the gap in rubber seal.
Described link is for fixing the screw bolt and nut of two flange bodies.
Described seal ring comprises circle body, and the inboard of circle body is provided with the gap of extending along circumferentially, and the circumferential both sides in gap form respectively large outer ring surface and little outer ring surface, and the radial width of large outer ring surface is greater than the radial width of little outer ring surface; Described seal ring is arranged in annular groove, and gap is towards circular port, and the extension of large outer ring surface is between the end face of two fittings bodies.The large outer ring surface of rubber seal and two fittings body end faces fit tightly, and are placed between both ends of the surface, and the concave surface of little outer ring surface and fittings body fits tightly, thereby realize good sealing effect.
Also be provided with inner ring surface between the large outer ring surface of described seal ring and little outer ring surface, inner ring surface is divided into upper and lower two-part by the gap in circle body, the sectional shape of seal ring be "
" shape.The main purpose of large outer ring surface 9, little outer ring surface and circle body is to play afterwards sealing gas in installation, the sealing surface of flanged joint sealing that used this rubber seal 3 to strengthen.
Described inner ring surface is provided with the gas guide groove that is communicated with upper and lower two-part gap.The purpose of gas guide groove is carried the gas in inner ring surface 7 two latasuture gaps, reaches the sealing effect of rubber seal 3 auto-compensations by gas pressure.
Width >=the 1.5mm of described gas guide groove, groove depth≤1.5mm.The width 1.5-2mm of preferred gas guide groove, groove depth≤1.5mm.
The radial width of described large outer ring surface equates with the radial width of fittings body opposing end surface.
Described inner ring surface equates with the radial width of little outer ring surface.
Wall thickness >=the 1mm of described little outer ring surface, the wall thickness >=2mm of large outer ring surface, the width≤1mm in upper and lower two-part gap.The wall thickness 1-1.5mm of preferred little outer ring surface, the wall thickness 2-3mm of large outer ring surface, the width 0.5-1mm in upper and lower two-part gap.
When abnormal in the appearance that is tightly connected, do not meet the design air-proof condition and while making positive normal pressure amount seal failure, when gap appears in working surface, now just there will be the phenomenon of leaking out, when leaking out, because inner side surface (with reference to A face shown in the figure 9) blast of large outer ring surface is constant, outer side surface (with reference to B face in the figure 9) blast of large outer ring surface reduces, thereby the large outer ring surface that makes seal ring moves and forms selfsealings effects (with reference to Figure 10) to the fittings body end face of large outer ring surface outer side surface.
Adopt flanged joint of the present invention, its seal ring has the sealing of pressure amount and realizing active sealing dual property, can be abnormal in the appearance that is tightly connected, do not meet the design air-proof condition and while making positive normal pressure amount seal failure, compensated, produced the second sealing, make sealing configuration there is large " redundancy " and improved reliability, even, in the situation that other structure divisions can not better be brought into play design function, still can keep the sealing function of former design rectangle circle body; With existing flange, with rectangular seal, exchange fully, rational in infrastructure, easy to use, cost is low, both can fill for Novel self sealing flange and existing flange, also can be used for the seal ring that the pressed gas line seal except the flange joint connects.
The invention has the beneficial effects as follows, flanged joint of the present invention has many in the past known scheme parts that are better than.Adopt modern equipment, be easy to manufacture the desired vertical flanges of joint.And the joint sealing dual face deform or fastening piece loosening, while producing undesired sealing, under the pressure of sealing gas, sealing layer occurs to expand deformation, forms new sealing at the sealing off gap position, thereby realizes the automatic compensation sealing effect.
The accompanying drawing explanation
Fig. 1 is use status architecture schematic diagram of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is that the three-dimensional of fittings body I of the present invention is partly cutd open structural drawing;
Fig. 4 is that the three-dimensional of fittings body II of the present invention is partly cutd open structural drawing;
Fig. 5 is the tomograph of rubber seal of the present invention;
Fig. 6 is the B-B sectional view of Fig. 5;
Fig. 7 is the tomograph of flange body of the present invention;
Fig. 8 is the gapped view of Fig. 2 working surface;
Fig. 9 is Fig. 8 K section enlarged view;
Figure 10 is Fig. 9 automatic compensation sealing design sketch.
Wherein: 1. fittings body I, 2. flange body, 3. rubber seal, 4. fittings body II, 5. vent slot, 6. little outer ring surface, 7. inner ring surface, 8. gas guide groove, 9. large outer ring surface, 10. circle body.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, but this should be interpreted as to the scope of above-mentioned theme of the present invention only limits to following embodiment.
As shown in Figure 1 and Figure 2, flanged joint comprises two fittings bodies: be respectively fittings body I 1 and fittings body II4, two flange bodies 2, seal rings (for rubber seal 3) and fix the bolt and nut of two flange bodies 2.
As shown in Figure 3, fittings body I 1: axially centre has circular port, the excircle direction is established boss, and close its end face separately of this boss, and the end face that fittings body is relative is smooth plane; The circular port axially middle inboard away from its end face is provided with the groove for pipe laying, makes circular port section vertically form boss-shaped.The excircle direction of fittings body is processed into the double polarizing keys shape.
As shown in Figure 4, fittings body II4: axially centre has circular port, the excircle direction is established boss, and close its end face separately of this boss, and the end face that fittings body is relative is smooth plane; The circular port axially middle inboard away from its end face is provided with the groove for pipe laying, makes circular port section vertically form boss-shaped.The excircle direction of fittings body is processed into the double polarizing keys shape.The end face of fittings body II 4 is provided with annular groove, and seal ring is arranged in annular groove, also is provided with several on fittings body II 4 and is communicated with circular port on fittings body II4 and the vent slot 5 of annular groove.Fittings body II4 upper-end surface offers four vent slots 5 to facilitate gas to fill wind by vent slot 5 to the gap in rubber seal 3 as shown in Figure 4.Become 90 ° of angles between adjacent two vent slots 5 of four vent slots 5.
As shown in Figure 7, described flange body 2, for connecting the structural member of two fittings bodies, has three circular holes, and middle circular hole is for passing through fittings body, and all the other two holes are for carrying out the circular hole of fastening body and rubber seal 3 by bolt.
The main purpose of large outer ring surface 9, little outer ring surface 6 and circle body 10 is to play afterwards sealing gas in installation, the sealing surface of flanged joint sealing that used this rubber seal 3 to strengthen, the purpose of gas guide groove 8 is carried the gas in inner ring surface 7 two latasuture gaps, reaches the sealing effect of rubber seal 3 auto-compensations by gas pressure.
After flanged joint assembling two flange body 2 end faces relatively, fit tightly, fittings body I 1, fittings body II 4 its end faces are relative, fittings body I 1, fittings body II4 and rubber seal 3 are arranged between two flange bodies 2, boss by two fittings bodies is stuck in the draw-in groove of two flange bodies 2, the large outer ring surface 9 of rubber seal 3 and two fittings body end faces fit tightly, and be placed between both ends of the surface, little outer ring surface 6 fits tightly with the concave surface of fittings body II 4; Thereby realize good sealing effect.
As shown in Figure 8, Figure 9, when abnormal in the appearance that is tightly connected, do not meet the design air-proof condition and while making positive normal pressure amount seal failure, when gap appears in working surface, now just there will be the phenomenon of leaking out, when leaking out, because A face blast is constant, B face blast reduces, thereby makes the large outer ring surface 9 of rubber seal 3 move the selfsealings effect formed as shown in figure 10 to fittings body I 1 end face.
Adopt flanged joint of the present invention, its fittings body II4 can well play the good result to rubber seal 3 interior gap inflation.
Adopt flanged joint of the present invention, its rubber seal 3 has the sealing of pressure amount and realizing active sealing dual property, can be abnormal in the appearance that is tightly connected, do not meet the design air-proof condition and while making positive normal pressure amount seal failure, compensated, produced the second sealing, make sealing configuration there is large " redundancy " and improved reliability, even, in the situation that other structure divisions can not better be brought into play design function, still can keep the sealing function of former design rectangle circle body; With existing flange, with rectangular seal, exchange fully, rational in infrastructure, easy to use, cost is low, both can fill for Novel self sealing flange and existing flange, also can be used for the seal ring that the pressed gas line seal except the flange joint connects.
Claims (7)
1. a flanged joint, it comprises two fittings bodies, two flange bodies; Described two its end faces of fittings body relatively, axially centre has circular port, the excircle direction is established boss, and this boss is near its end face separately, be provided with annular groove between two fittings bodies, Sealing is installed in annular groove, described two its end faces of flange body are relative, centre has circular hole, are provided with the annular slot matched with described boss in circular hole; The boss of two fittings bodies is stuck in the draw-in groove of two flange bodies, and two flange bodies are fixed together by link, it is characterized in that, described fittings body is provided with several vent slots that is communicated with circular port and annular groove; Described Sealing is seal ring, and described seal ring comprises circle body, and the inboard of circle body is provided with the gap of extending along circumferentially, and the circumferential both sides in gap form respectively large outer ring surface and little outer ring surface, and the radial width of large outer ring surface is greater than the radial width of little outer ring surface; Described seal ring is arranged in annular groove, and gap is towards circular port, and the extension of large outer ring surface is between the end face of two fittings bodies; Also be provided with inner ring surface between the large outer ring surface of described seal ring and little outer ring surface, inner ring surface is divided into upper and lower two-part by the gap in circle body, the sectional shape of seal ring be "
" shape.
2. flanged joint as claimed in claim 1, is characterized in that, described annular groove is located on the end face of one of them fittings body.
3. flanged joint as claimed in claim 1 or 2, is characterized in that, described vent slot is equally distributed 4, and adjacent two vent slots become 90 °.
4. flanged joint as claimed in claim 1, is characterized in that, described link is for fixing the screw bolt and nut of two flange bodies.
5. flanged joint as claimed in claim 1, is characterized in that, described inner ring surface is provided with the gas guide groove that is communicated with upper and lower two-part gap; Width >=the 1.5mm of described gas guide groove, groove depth≤1.5mm.
6. flanged joint as claimed in claim 1, is characterized in that, the radial width of described large outer ring surface equates with the radial width of fittings body opposing end surface.
7. flanged joint as claimed in claim 1, is characterized in that, described inner ring surface equates with the radial width of little outer ring surface; Wall thickness >=the 1mm of described little outer ring surface, the wall thickness >=2mm of large outer ring surface, the width≤1mm in upper and lower two-part gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110388265.XA CN102494210B (en) | 2011-11-29 | 2011-11-29 | Flange joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110388265.XA CN102494210B (en) | 2011-11-29 | 2011-11-29 | Flange joint |
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| Publication Number | Publication Date |
|---|---|
| CN102494210A CN102494210A (en) | 2012-06-13 |
| CN102494210B true CN102494210B (en) | 2014-01-01 |
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|---|---|---|---|
| CN201110388265.XA Active CN102494210B (en) | 2011-11-29 | 2011-11-29 | Flange joint |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103453251A (en) * | 2013-09-13 | 2013-12-18 | 太原重工股份有限公司 | Attached flange of hydraulic machine |
| CN108626493A (en) * | 2018-05-08 | 2018-10-09 | 徐州东鑫铸造有限公司 | A kind of sealing ring |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201875318U (en) * | 2010-10-31 | 2011-06-22 | 安徽友特自动化设备有限公司 | Bearing flange with seal groove |
| CN202521088U (en) * | 2011-11-29 | 2012-11-07 | 济南轨道交通装备有限责任公司 | Flange joint |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998037352A1 (en) * | 1997-02-24 | 1998-08-27 | Swagelok Company | Hygienic flange-type tube joint thermal expansion area for gasket |
| JP3149390B2 (en) * | 1997-07-09 | 2001-03-26 | 株式会社大創 | Pipe fittings |
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2011
- 2011-11-29 CN CN201110388265.XA patent/CN102494210B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201875318U (en) * | 2010-10-31 | 2011-06-22 | 安徽友特自动化设备有限公司 | Bearing flange with seal groove |
| CN202521088U (en) * | 2011-11-29 | 2012-11-07 | 济南轨道交通装备有限责任公司 | Flange joint |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平11-30366A 1999.02.02 |
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| CN102494210A (en) | 2012-06-13 |
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Address after: Huai Village Street Huaiyin District of Ji'nan city of Shandong Province, No. 73 250022 Patentee after: Shandong Zhongche Locomotive Co. Ltd. Address before: Huai Village Street Huaiyin District of Ji'nan city of Shandong Province, No. 73 250022 Patentee before: Jinan Rail Traffic Equipment Co., Ltd. |