CN211693910U - Insulating joint with good sealing performance - Google Patents
Insulating joint with good sealing performance Download PDFInfo
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- CN211693910U CN211693910U CN201922267626.XU CN201922267626U CN211693910U CN 211693910 U CN211693910 U CN 211693910U CN 201922267626 U CN201922267626 U CN 201922267626U CN 211693910 U CN211693910 U CN 211693910U
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- flange
- sealing
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- seal
- seal groove
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Abstract
The utility model discloses a good insulating joint of sealing performance for connect first pipe and second pipe, include: first pipe flange, second pipe flange and seal structure, seal structure includes insulating seal circle and two at least O type sealing washers, insulating seal circle with first seal groove has been seted up on the plane of first pipe flange contact, first O type sealing washer is placed in the first seal groove, insulating seal circle with the second seal groove has been seted up on the plane of second pipe flange contact, second O type sealing washer is placed in the second seal groove, first seal groove and second seal groove are trapezoidal seal groove. The utility model discloses the good insulating joint of sealing performance adopts neotype seal structure, under the prerequisite of not destroying flange intensity, can effectual improvement insulating joint's sealing performance, especially can realize the self sealss when insulating joint atress is crooked, and pressure is higher, and sealed effect is just better.
Description
Technical Field
The utility model relates to a pipeline component field especially relates to an insulating joint that sealing performance is good.
Background
The insulating joint is an indispensable important pipeline accessory in a gas transmission and distribution and petroleum pipeline system, is mainly applied to the gas or petroleum transmission and distribution system and a gas or petroleum pressure regulating station, and has the functions of insulating and isolating all sections of a transmission and distribution pipeline and the pressure regulating station and the transmission and distribution pipeline from each other, protecting the transmission and distribution pipeline from electrochemical corrosion, prolonging the service life and being capable of being directly buried for use. A sealing system in the insulating joint consists of a sealing material and a sealing ring, the appropriate sealing material and the appropriate sealing ring are selected according to the system pressure and the material conveying condition, but most of the buried insulating joints bear complex bending stress, and the sealing effect of the buried insulating joints can be ensured under the action of bearing the bending stress.
The conventional sealing structure of the insulating joint is shown in fig. 1, that is, a circular sealing ring 132b is located in a rectangular sealing groove 1312b, which can meet the use requirement under normal operating conditions, when the pipeline encounters stratum stress, working stress and structural stress variation of the pipeline itself, or even an earthquake accident, the pipeline will generate severe bending deformation, as shown in fig. 1, thereby causing sealing cracking, high-pressure gas enters the sealing groove 1312b, and the sealing ring 132b is forced to deform and lean towards the inner side of the sealing groove 1312b, thereby causing sealing failure and leakage.
Some manufacturers recognize the severity of this problem and they are concerned about the serious consequences of such seal failure. The improvement is usually made by adding a further set of sealing rings in parallel. Such seals at the sealing points will also fail when the pipe is subjected to bending stresses, and some may incorporate a third or fourth set of seals due to fear of possible seal leakage from such a configuration. Since the problem is not solved scientifically, it is also impossible to improve the safety.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a good insulating joint of sealing performance, adopts neotype seal structure, under the prerequisite of not destroying flange intensity, can effectual improvement insulating joint's sealing performance, especially can realize the self sealss when insulating joint atress is crooked, pressure is high more, and sealed effect is just better.
In order to solve the technical problem, the utility model discloses a technical scheme be: there is provided an insulated joint having excellent sealability for connecting a first conduit and a second conduit, the insulated joint comprising: first pipe flange and second pipe flange, first pipe flange with there is seal structure between the second pipe flange, seal structure includes insulating seal circle and two at least O type sealing washers, and two O type sealing washers are first O type sealing washer and second O type sealing washer, insulating seal circle with first seal groove has been seted up on the plane of first pipe flange contact, first O type sealing washer is placed in the first seal groove, insulating seal circle with the second seal groove has been seted up on the plane of second pipe flange contact, second O type sealing washer is placed in the second seal groove, first seal groove and second seal groove are trapezoidal seal groove.
In a preferred embodiment of the present invention, the insulating joint further comprises an outer sleeve, the outer sleeve is sleeved outside the first conduit flange and the second conduit flange, and an insulating sealing filler is filled between the outer sleeve and the second conduit flange.
In a preferred embodiment of the present invention, the trapezoid sealing groove is a trapezoid sealing groove having an inclined edge on one side, and the trapezoid long edge is the side close to the first pipe flange or the second pipe flange, and the trapezoid inclined edge is the side away from the inner wall of the flange.
In a preferred embodiment of the present invention, the first guide pipe is welded to the first guide pipe flange, and the second guide pipe is welded to the right second guide pipe flange.
In a preferred embodiment of the present invention, the second conduit flange has a step structure, and the inner wall of the outer sleeve has a matching step structure.
In a preferred embodiment of the present invention, the insulating isolation material is filled between the two step transverse planes of the second conduit flange and the outer sleeve, and the sealing material is filled between the second conduit flange and the step vertical plane of the outer sleeve.
The utility model has the advantages that: the utility model discloses the good insulating joint of sealing performance adopts neotype seal structure, under the prerequisite of not destroying flange intensity, when suffering from powerful bending stress and destroying the sealing surface, the high-pressure gas of intraductal transport gets into sealed face, will push away the sealing washer and tightly press on last sealed face along trapezoidal slope. The higher the gas pressure in the pipe is, the tighter the pressure is, the better the sealing is, thereby forming a self-sealing mechanism with special safety guarantee, and particularly showing the superiority when the self-sealing mechanism is subjected to unexpected situations such as bending stress and the like.
Drawings
FIG. 1 is a graph of the sealing effect of an O-ring in a sealing groove when an insulated joint of a prior art structure is bent by a force;
fig. 2 is a schematic structural diagram of a preferred embodiment of the insulating joint with good sealing performance according to the present invention;
FIG. 3 is a graph showing the sealing effect of the O-ring in the trapezoid sealing groove when the insulation joint is bent by a force;
the parts in the drawings are numbered as follows: 11-first pipe flange, 12-second pipe flange, 131-insulating sealing ring, 132-first O-shaped sealing ring, 133-second O-shaped sealing ring, 1311-first sealing groove and 1312-second sealing groove.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
Referring to fig. 1, an embodiment of the present invention includes: there is provided an insulated joint having excellent sealing performance for connecting a first conduit and a second conduit 3, the insulated joint comprising: a first conduit flange 11 and a second conduit flange 12, a sealing structure and an outer sleeve 14.
The first conduit is welded to the first conduit flange and the second conduit 3 is welded to the second conduit flange.
The sealing structure is located between the first pipe flange 11 and the second pipe flange 12, the sealing structure includes an insulating sealing ring 131 and at least two O-ring seals, the two O-ring seals are a first O-ring seal 132 and a second O-ring seal 133, a first sealing groove 1311 is formed on a plane where the insulating sealing ring 131 contacts the first pipe flange 11, the first O-ring seal 132 is placed in the first sealing groove 1311, a second sealing groove 1312 is formed on a plane where the insulating sealing ring 131 contacts the second pipe flange 12, the second O-ring seal 132 is placed in the second sealing groove 1312, and the first sealing groove 1311 and the second sealing groove 1312 are trapezoid sealing grooves. The trapezoid sealing groove is a trapezoid sealing groove with an inclined edge on one side, the long trapezoid edge is close to one side of the first pipe flange 11 or the second pipe flange 12, and the inclined edge is the side far away from the inner wall of the flange.
The outer sleeve 14 is sleeved outside the first conduit flange 11 and the second conduit flange 12, and insulating sealing filler is filled between the outer sleeve 14 and the second conduit flange 12. The second duct flange 12 is of stepped configuration and the inner wall of the outer sleeve 14 is also of a suitably stepped configuration. The insulating isolation material 51 is filled between two step transverse planes in contact with the second conduit flange 12 and the outer sleeve 14, and the sealing material 52 is filled between two step vertical planes in contact with the second conduit flange 12 and the outer sleeve 14.
The utility model discloses the good insulating joint of sealing performance has following advantage:
1. a novel sealing structure is adopted, an O-shaped ring serving as a main sealing element and the whole insulating sealing ring are integrated, and a groove of the O-shaped ring is trapezoidal. The ladder-shaped sealing groove has the configuration shown in fig. 3. The sealing grooves on both sides of the sealing material are sloped so that in case of strong bending stresses damaging the sealing surfaces, high-pressure gas conveyed in the pipe enters the sealing surfaces. It will push the sealing ring upwards and tightly press the sealing ring on the upper sealing surface. The higher the gas pressure in the tube, the tighter the compression and the better the seal. Obviously, this is a special safety self-sealing mechanism, especially when exposed to bending stress and other accidents.
2. The traditional insulating joint sealing groove is designed on two flanges, so that the strength of the flange is reduced, and the sealing effect is reduced. It is well known that in O-ring seals, the surface roughness requirements of the mating surfaces are much greater than the surface roughness requirements of the grooves. The surface roughness of the original insulating ring can not meet the requirement due to the material, so that the probability of high-pressure sealing failure is increased. The matching surface of the groove is changed into the surface of the flange, so that the roughness requirement of the matching surface can meet the established requirement, the strength of the flange is not weakened, and the method is an attractive scheme.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (6)
1. An insulated joint having excellent sealing properties for connecting a first conduit to a second conduit, said insulated joint comprising: first pipe flange and second pipe flange, first pipe flange with there is seal structure between the second pipe flange, its characterized in that, seal structure includes insulating seal circle and two at least O type sealing rings, and two O type sealing rings are first O type sealing ring and second O type sealing ring, insulating seal circle with first seal groove has been seted up on the plane of first pipe flange contact, first O type sealing ring is placed in the first seal groove, insulating seal circle with the second seal groove has been seted up on the plane of second pipe flange contact, second O type sealing ring is placed in the second seal groove, first seal groove and second seal groove are trapezoidal seal groove.
2. The high-sealability insulation joint of claim 1, further comprising an outer sleeve, wherein the outer sleeve is sleeved outside the first conduit flange and the second conduit flange, and an insulation sealing filler is filled between the outer sleeve and the second conduit flange.
3. The insulated joint with good sealing performance according to claim 1, wherein the trapezoid sealing groove is a trapezoid sealing groove with an inclined edge on one side, the long side of the trapezoid is the side close to the first conduit flange or the second conduit flange, and the inclined edge of the trapezoid is the side far from the inner wall of the flange.
4. The insulated joint with good sealing performance according to claim 1, wherein the first conduit is welded to a first conduit flange, and the second conduit is welded to a right second conduit flange.
5. The sealed insulated joint of claim 2, wherein the second conduit flange is a stepped configuration and the inner wall of the outer sleeve is a mating stepped configuration.
6. The insulated joint with good sealing performance according to claim 5, wherein an insulating isolation material is filled between two step transverse planes in contact with the second conduit flange and the outer sleeve, and a sealing material is filled between two step vertical planes in contact with the second conduit flange and the outer sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922267626.XU CN211693910U (en) | 2019-12-17 | 2019-12-17 | Insulating joint with good sealing performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922267626.XU CN211693910U (en) | 2019-12-17 | 2019-12-17 | Insulating joint with good sealing performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211693910U true CN211693910U (en) | 2020-10-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922267626.XU Active CN211693910U (en) | 2019-12-17 | 2019-12-17 | Insulating joint with good sealing performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211693910U (en) |
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2019
- 2019-12-17 CN CN201922267626.XU patent/CN211693910U/en active Active
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