CN202521088U - Flange joint - Google Patents
Flange joint Download PDFInfo
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- CN202521088U CN202521088U CN2011204864777U CN201120486477U CN202521088U CN 202521088 U CN202521088 U CN 202521088U CN 2011204864777 U CN2011204864777 U CN 2011204864777U CN 201120486477 U CN201120486477 U CN 201120486477U CN 202521088 U CN202521088 U CN 202521088U
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- outer ring
- ring surface
- bodies
- sealing
- flange
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Abstract
The utility model discloses a flange joint comprising two joint bodies, two flange bodies and a sealing ring. End faces of the two joint bodies are opposite, round holes are arranged along the axial direction in the middles of the two joint bodies, and bosses are arranged along the outer circumferential direction on the two joint bodies. The bosses are close to the respective end faces. A ring groove is arranged between the two joint bodies. A sealing part is arranged in the ring groove. End faces of the two flange bodies are opposite and the middle portions of the two flange bodies are provided with round holes. Ring-shaped slots matched with the bosses are arranged in the round holes. The bosses of the two joint bodies are clamped into the slots 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 air venting grooves which communicate the round holes with the ring grooves. The sealing ring section which is ring-shaped comprises a ring body, a large outer ring face and a small outer ring face. A crack extending along the circumferential direction is arranged on the inner side of the ring body, the large outer ring face and the small outer ring face are respectively formed along the circumferential direction on two sides of the crack, and the radial direction width of the large outer ring face is wider than that of the small outer ring face. When abnormal sealing is produced due to the fact that the flange joint is deformed on a joint sealing dual face or a fastening piece is loosened, a sealing layer expands to be reshaped under the pressure of sealing gas and new sealing is formed on a sealing crack part so that automatic compensation sealing effects are achieved.
Description
Technical field
The utility model relates to the flanged joint that a kind of railway freight-car connects braking air pipe, especially the joint of pressed gas line seal connection.
Background technique
The structural type of flanged joint is of all kinds, and most joints are all guaranteeing that sealing configuration satisfies " passive " sealing under design and manufacturing, the maintenance requirement prerequisite, promptly must keep joint inner seal ring essential compressibility down in working order.In case because of installation question or the loosening compressibility that causes is installed reduces, the joint sealing effect will reduce, for maximum airtight of sealing difficulty, this phenomenon is more remarkable.In case in use joint sealing lost efficacy; Will cause leakage; Like its air damping piping of railway freight-car of moving on China's circuit owing to, sew ubiquity, particularly at the cold area of China in the influence of installing and using aspect such as maintenance; Be insurmountable for a long time problem, had a strong impact on safety of railway traffic.
Number of patent application is 200820062412.8, and notification number is CN201162820Y, and 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, and the deficiency that its technological scheme exists is: when installation conditions met design requirement, " E " shape seal ring was packed into behind 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.Deform because of installation question, flange body or clamping bolt is loosening causes installing when producing the gap at the sealing dual face; Pressed gas gets between the two fittings body gaps; And can not get into vent slot; Therefore pressure air can only be exerted pressure to upper lip, makes seal ring and fittings body produce the slit and produces a large amount of leakages, this shows that the design irrationality that causes flanged joint to reveal mainly to be owing to seal ring and fittings body causes.
Summary of the invention
The purpose of the utility model is for overcoming the deficiency of above-mentioned existing technology, a kind of flanged joint is provided, and this is rational in infrastructure, easy to use, cost is low, sealing is reliable.
For realizing above-mentioned purpose, the utility model adopts following technical proposals:
A kind of flanged joint, it comprises two fittings bodies, two flange bodies; Said two its end faces of fittings body relatively, axially the 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 the annular groove, and said two its end faces of flange body are relative, the centre has circular hole, are provided with the annular slot that matches with said boss in the 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 through link, and said fittings body is provided with several vent slots that is communicated with circular port and annular groove.
The fittings body opposing end faces is smooth plane; The axially middle inboard away from its end face of circular port is provided with the groove that is used for pipe laying, makes circular port section vertically form the boss shape.The excircle direction of fittings body is processed into the double polarizing keys shape.
Said flange body has three circular holes for connecting the structural member of two fittings bodies, and middle circular hole is for passing through fittings body, and all the other two holes are for to come the circular hole of fastening body and rubber seal through bolt.
Said annular groove is located on the end face of one of them fittings body.This joint physical efficiency well plays the good result to slit inflation in the rubber seal 3.
Said Sealing is a seal ring.
Said vent slot is equally distributed 4, and adjacent two vent slots become 90 °.Vent slot makes things convenient for gas to fill wind through the slit of vent slot in rubber seal.
Said link is the screw bolt and nut that is used for fixing two flange bodies.
Said seal ring comprises circle body, and the inboard of circle body is provided with the slit along extending circumferentially, and the circumferential both sides in slit form big outer ring surface and little outer ring surface respectively, and the radial width of big outer ring surface is greater than the radial width of little outer ring surface; Said seal ring is installed in the annular groove, and the slit is towards circular port, and the extension of big outer ring surface is between the end face of two fittings bodies.The big outer ring surface of rubber seal and two fittings body end faces fit tightly, and place between the 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 big outer ring surface of said seal ring and the little outer ring surface; Inner ring surface is divided into two-part up and down with the slit in the circle body, and the sectional shape of seal ring is
shape.The main purpose of big outer ring surface 9, little outer ring surface and circle body is after installation, to play sealing gas, uses this rubber seal 3 can strengthen the sealing surface of flanged joint sealing.
Said inner ring surface is provided with and is communicated with the gas guide groove in two-part slit up and down.The purpose of gas guide groove is that the gas in the inner ring surface 7 two latasuture cracks is carried, and reaches rubber seal 3 sealing effect of compensation automatically through gas pressure.
Width>=the 1.5mm of said 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 said big outer ring surface equates with the radial width of fittings body opposing end surface.
Said inner ring surface equates with the radial width of little outer ring surface.
Wall thickness>=the 1mm of said little outer ring surface, the wall thickness>=2mm of big outer ring surface, the width≤1mm in two-part slit up and down.The wall thickness 1-1.5mm of preferred little outer ring surface, the wall thickness 2-3mm of big outer ring surface, the width 0.5-1mm in two-part slit up and down.
When unusual in the appearance that is tightly connected; Do not satisfy the design air-proof condition and when making positive normal pressure amount seal failure, promptly when the slit appears in working surface when, the phenomenon that will occur leaking out at this moment; When leaking out; Owing to inner side surface (with reference to the A face shown in Figure 9) blast of big outer ring surface is constant, outer side surface (with reference to B face among the figure 9) blast of big outer ring surface reduces, thereby makes the big outer ring surface of seal ring move formation selfsealings effects (with reference to Figure 10) to the fittings body end face of big outer ring surface outer side surface.
Adopt the flanged joint of the utility model, its seal ring has the sealing of pressure amount and initiatively seals dual performance, can be unusual in the appearance that is tightly connected; Do not satisfy the design air-proof condition and when making positive normal pressure amount seal failure; Compensate, produce second road sealing, make sealing configuration have that big " redundancy " has improved reliability; Even can not better bring into play under the situation of design function at other structure divisions, still can keep the sealing function of former design rectangle circle body; Exchange fully with rectangular seal with existing flange, rational in infrastructure, easy to use, cost is low, both can adorn to be used for novel selfsealings flange and existing flange, also can be used for the seal ring that the pressed gas line seal except that the flange joint connects.
The beneficial effect of the utility model is that the utility model flanged joint has many known solutions parts in the past that are superior to.Adopt modern equipment, be easy to make the desired vertical flanges of joint.And the joint sealing dual face deform or fastening piece loosening, when producing undesired sealing, under the pressure of sealing gas, sealing layer takes place to expand deformation, forms new sealing at the sealing off gap position, thus realization automatic compensation sealing effect.
Description of drawings
Fig. 1 is the user mode structural representation of the utility model;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is that the three-dimensional of the fittings body I of the utility model is partly cutd open structural drawing;
Fig. 4 is that the three-dimensional of the fittings body II of the utility model is partly cutd open structural drawing;
Fig. 5 is the tomograph of the rubber seal of the utility model;
Fig. 6 is the B-B sectional view of Fig. 5;
Fig. 7 is the tomograph of the flange body of the utility model;
Fig. 8 is the gapped view of Fig. 2 working surface;
Fig. 9 is Fig. 8 K portion 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. big outer ring surface, 10. circle body.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further to describe in detail, but should this be interpreted as that the scope of the above-mentioned theme of the utility model only limits to following embodiment.
Like Fig. 1, shown in Figure 2, flanged joint comprises two fittings bodies: be respectively fittings body I 1 and fittings body II4, the bolt and nut of two flange bodies 2, seal ring (being rubber seal 3) and fixing two flange bodies 2.
As shown in Figure 3, fittings body I 1: have circular port axially, the excircle direction is established boss, and this boss is near its end face separately, the fittings body opposing end faces is smooth plane; The axially middle inboard away from its end face of circular port is provided with the groove that is used for pipe laying, makes circular port section vertically form the boss shape.The excircle direction of fittings body is processed into the double polarizing keys shape.
As shown in Figure 4, fittings body II4: have circular port axially, the excircle direction is established boss, and this boss is near its end face separately, the fittings body opposing end faces is smooth plane; The axially middle inboard away from its end face of circular port is provided with the groove that is used for pipe laying, makes circular port section vertically form the boss shape.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 installed in the annular groove, also is provided with several on the fittings body II 4 and is communicated with circular port and the vent slot 5 of annular groove on fittings body II4.Fittings body II4 as shown in Figure 4 upper-end surface offers four vent slots 5 and fills wind to make things convenient for gas through the slit of vent slot 5 in rubber seal 3.Become 90 ° of angles between adjacent two vent slots 5 of four vent slots 5.
As shown in Figure 7, said flange body 2 has three circular holes for connecting the structural member of two fittings bodies, and middle circular hole is for passing through fittings body, and all the other two holes are for to come the circular hole of fastening body and rubber seal 3 through bolt.
Form by circle body 10, big outer ring surface 9, little outer ring surface 6, inner ring surface 7 and gas guide groove 8 like Fig. 5, rubber seal shown in Figure 63.The inboard of circle body 10 is provided with the slit along extending circumferentially, and the circumferential both sides in slit form big outer ring surface 9 and little outer ring surface 6 respectively, and the radial width of big outer ring surface 9 is greater than the radial width of little outer ring surface 6; Said rubber seal 3 is installed in the annular groove, and the slit is towards circular port, and the extension of big outer ring surface 9 is between the end face of two fittings bodies.Also be provided with inner ring surface 7 between the big outer ring surface 9 of said rubber seal 3 and the little outer ring surface 6; Inner ring surface 7 is divided into two-part up and down with the slit in the circle body 10, and the sectional shape of rubber seal 3 is
shape.Inner ring surface 7 is provided with and is communicated with the gas guide groove 8 in two-part slit up and down.The width of gas guide groove 8 is 1.5mm, and groove depth is 1.5mm.The radial width of big outer ring surface 9 equates that with the radial width of fittings body opposing end surface said inner ring surface 7 equates with the radial width of little outer ring surface 6.The wall thickness of little outer ring surface 6 is 1mm, and the wall thickness of big outer ring surface 9 is 2mm, and the width in two-part slit is 1mm up and down.
The main purpose of big outer ring surface 9, little outer ring surface 6 and circle body 10 is after installation, to play sealing gas; Use this rubber seal 3 can strengthen the sealing surface of flanged joint sealing; The purpose of gas guide groove 8 is that the gas in the inner ring surface 7 two latasuture cracks is carried, and reaches rubber seal 3 sealing effect of compensation automatically through gas pressure.
Flanged joint assembling back two flange bodies, 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, and the boss through two fittings bodies is stuck in the draw-in groove of two flange bodies 2, and the big outer ring surface 9 of rubber seal 3 and two fittings body end faces fit tightly; And place between the both ends of the surface, little outer ring surface 6 fits tightly with the concave surface of fittings body II4; Thereby realize good sealing effect.
Like Fig. 8, shown in Figure 9,, do not satisfy the design air-proof condition and when making positive normal pressure amount seal failure when occurring unusually being tightly connected; Promptly when the slit appears in working surface; The phenomenon that will occur leaking out this moment is when leaking out, because A face blast is constant; B face blast reduces, and forms selfsealings effect shown in figure 10 thereby make the big outer ring surface 9 of rubber seal 3 move to fittings body I 1 end face.
Adopt the flanged joint of the utility model, its fittings body II4 can well play the good result to slit inflation in the rubber seal 3.
Adopt the flanged joint of the utility model, its rubber seal 3 has the sealing of pressure amount and initiatively seals dual performance, can be unusual in the appearance that is tightly connected; Do not satisfy the design air-proof condition and when making positive normal pressure amount seal failure; Compensate, produce second road sealing, make sealing configuration have that big " redundancy " has improved reliability; Even can not better bring into play under the situation of design function at other structure divisions, still can keep the sealing function of former design rectangle circle body; Exchange fully with rectangular seal with existing flange, rational in infrastructure, easy to use, cost is low, both can adorn to be used for novel selfsealings flange and existing flange, also can be used for the seal ring that the pressed gas line seal except that the flange joint connects.
Claims (10)
1. flanged joint, it comprises two fittings bodies, two flange bodies; Said two its end faces of fittings body relatively, axially the 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 the annular groove, and said two its end faces of flange body are relative, the centre has circular hole, are provided with the annular slot that matches with said boss in the 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 through link, it is characterized in that, said fittings body is provided with several vent slots that is communicated with circular port and annular groove.
2. flanged joint as claimed in claim 1 is characterized in that said annular groove is located on the end face of one of them fittings body.
3. according to claim 1 or claim 2 flanged joint is characterized in that said Sealing is a seal ring.
4. according to claim 1 or claim 2 flanged joint is characterized in that said vent slot is equally distributed 4, and adjacent two vent slots become 90 °.
5. flanged joint as claimed in claim 1 is characterized in that, said link is the screw bolt and nut that is used for fixing two flange bodies.
6. flanged joint as claimed in claim 3; It is characterized in that said seal ring comprises circle body, the inboard of circle body is provided with the slit along extending circumferentially; The circumferential both sides in slit form big outer ring surface and little outer ring surface respectively, and the radial width of big outer ring surface is greater than the radial width of little outer ring surface; Said seal ring is installed in the annular groove, and the slit is towards circular port, and the extension of big outer ring surface is between the end face of two fittings bodies.
7. flanged joint as claimed in claim 6 is characterized in that, also is provided with inner ring surface between the big outer ring surface of said seal ring and the little outer ring surface, and inner ring surface is divided into two-part up and down with the slit in the circle body.
8. flanged joint as claimed in claim 7 is characterized in that, said inner ring surface is provided with and is communicated with the gas guide groove in two-part slit up and down; Width>=the 1.5mm of said gas guide groove, groove depth≤1.5mm.
9. flanged joint as claimed in claim 6 is characterized in that, the radial width of said big outer ring surface equates with the radial width of fittings body opposing end surface.
10. flanged joint as claimed in claim 7 is characterized in that, said inner ring surface equates with the radial width of little outer ring surface; Wall thickness>=the 1mm of said little outer ring surface, the wall thickness>=2mm of big outer ring surface, the width≤1mm in two-part slit up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204864777U CN202521088U (en) | 2011-11-29 | 2011-11-29 | Flange joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204864777U CN202521088U (en) | 2011-11-29 | 2011-11-29 | Flange joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202521088U true CN202521088U (en) | 2012-11-07 |
Family
ID=47104040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204864777U Expired - Lifetime CN202521088U (en) | 2011-11-29 | 2011-11-29 | Flange joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202521088U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494210A (en) * | 2011-11-29 | 2012-06-13 | 济南轨道交通装备有限责任公司 | Flange joint |
-
2011
- 2011-11-29 CN CN2011204864777U patent/CN202521088U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494210A (en) * | 2011-11-29 | 2012-06-13 | 济南轨道交通装备有限责任公司 | Flange joint |
| CN102494210B (en) * | 2011-11-29 | 2014-01-01 | 济南轨道交通装备有限责任公司 | Flange joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121107 Effective date of abandoning: 20140101 |
|
| RGAV | Abandon patent right to avoid regrant |