CN217683780U - Insulating joint sealing structure - Google Patents
Insulating joint sealing structure Download PDFInfo
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- CN217683780U CN217683780U CN202221802615.2U CN202221802615U CN217683780U CN 217683780 U CN217683780 U CN 217683780U CN 202221802615 U CN202221802615 U CN 202221802615U CN 217683780 U CN217683780 U CN 217683780U
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Abstract
The utility model discloses an insulating joint sealing structure, including sealing rubber ring one, sealing rubber ring two and polytetrafluoroethylene circle, the insulating joint includes nipple joint one, nipple joint two, flange one, flange two, insulating ring and cylinder liner, a nipple joint end connection the flange one, nipple joint two end connection the flange two, set up the insulating ring between flange one and the flange two, the flange one with the flange two outside is connected through the cylinder liner, the inner of insulating ring is located sealed chamber, sealing rubber ring one with sealing rubber ring two inlay respectively in the sealed intracavity of insulating ring both sides, the polytetrafluoroethylene circle inlay in the sealed intracavity of insulating ring inboard; the utility model provides an insulating joint seal structure adopts the combination of trapezoidal sealed rubber ring + polytetrafluoroethylene circle, guarantees each item needs of insulating joint, makes it can be long-term in long-distance pipeline, good, stable operation.
Description
Technical Field
The utility model relates to a seal structure technical field especially relates to an insulating joint seal structure.
Background
At present, with the development of new energy in cities in China, pipelines are rapidly increased, for example: the west-east gas transmission main line, the middle-east russian line and the like, long-distance transmission pipelines (oil, gas, water and the like) such as oil and gas pipelines are laid underground, the long-distance transmission pipelines are strongly influenced by external environment and internal media for a long time, the convenience requirement of the use mode is met, the installation mode of a part of insulating joints is gradually transferred to the ground from underground installation, the length of the overground pipe sections of the long-distance transmission pipelines is limited, the installation position of the insulating joints is closer to stress concentration parts such as elbows or tees, and the like, and possibly in the use process, the pipelines are subjected to larger stress, the structural deformation occurs to the pipelines, and the sealing performance of the insulating joints under the condition needs to be ensured, so the sealing requirement on the insulating joints is more strict, and the sealing performance needs to be more suitable for structural deformation and must be sealed at the same time. The conventional insulating joint uses an O-shaped sealing rubber ring and a U-shaped sealing rubber ring, and the O-shaped sealing rubber ring has a smaller sealing section, so that when the insulating joint is subjected to external stress in a pipeline, the sealing failure can occur due to the influence of external force; the larger sealing section of the U-shaped sealing rubber ring makes up the defect of the O-shaped rubber ring, but in the assembling process, the U-shaped rubber ring arranged at the top of the sealing ring is extruded into a gap between the flange and the cylinder sleeve, so that the flash and even the layering of the sealing rubber ring can be caused, and the insulating joint has potential safety hazard in long-term use. The two annular sealing plates are not easy to align and position when being installed by the U-shaped sealing rubber ring arranged in the middle part. And because the processing problem can not guarantee that the clearance of interior flange and outer flange does not have the impurity entering, and then corrodes inside the joint.
In summary, it is an urgent problem to provide a novel insulating joint sealing structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an insulating joint seal structure to solve the problem that above-mentioned prior art exists, adopt the combination of trapezoidal sealing rubber ring + polytetrafluoroethylene circle, have good corrosion resisting property and electrical insulation performance, and good sealed, guarantee each item needs of insulating joint, make it can be long-term in long-distance pipeline, good, stable operation.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides an insulating joint seal structure, including sealed rubber ring one, sealed rubber ring two and polytetrafluoroethylene circle, insulating joint includes nipple joint one, nipple joint two, flange one, flange two, insulating ring and cylinder liner, a nipple joint end connection flange one, two end connection of nipple joint the flange two, flange one with set up between the flange two the insulating ring, flange one with two outsides of flange pass through the cylinder liner is connected, the inner of insulating ring is located sealed chamber, sealed rubber ring one with sealed rubber ring two respectively embedded in the insulating ring both sides sealed intracavity, polytetrafluoroethylene circle embedded in the insulating ring is inboard sealed intracavity.
Preferably, the first sealing rubber ring and the second sealing rubber ring are symmetrically arranged on two sides of the insulating ring.
Preferably, the cross sections of the first sealing rubber ring and the second sealing rubber ring are both right-angled trapezoids.
Preferably, the seal cavity comprises a first annular seal cavity with a conical cross section and a second annular seal cavity with a rectangular cross section, the two annular seal cavities are located on the inner side of the first annular seal cavity, the second annular seal cavity is communicated with the inner holes of the first flange and the second flange, the width of the first annular seal cavity is larger than that of the second annular seal cavity, so that the two sides of the second annular seal cavity form a clamping part, the inner part of the polytetrafluoroethylene ring is embedded in the second annular seal cavity, and the outer part of the polytetrafluoroethylene ring is embedded in the first annular seal cavity and clamped on the clamping part.
Preferably, the first sealing rubber ring and the second sealing rubber ring are symmetrically arranged in the first annular sealing cavity and are positioned on the outer side of the polytetrafluoroethylene ring.
Preferably, the periphery of the polytetrafluoroethylene ring is further provided with an annular groove, and the bottom of the insulating ring is inserted into the annular groove.
The utility model discloses following beneficial technological effect has been gained for prior art:
1. the utility model provides an insulating joint seal structure adopts the combination of trapezoidal sealing rubber ring + polytetrafluoroethylene circle, and the polytetrafluoroethylene circle is direct and the contact of pipe inner wall, and resistant medium corrosion resistance can be better than rubber, and inside rubber seal does not contact with the medium, has good corrosion resisting property and electrical insulation performance to and good sealed, guarantee insulating each item needs that connect, make it can be long-term in long-distance pipeline, good, stable operation.
2. When the inner wall of the pipeline is pressed, the polytetrafluoroethylene ring deforms inwards to push the rubber ring to seal in a self-tightening manner, and the sealing is tighter as the pressure is higher.
3. The polytetrafluoroethylene ring has certain deformation energy to resist the bending moment deformation of the insulating joint.
4. During assembly, the strength of the polytetrafluoroethylene ring resists the inward pressing force of the sealing ring, so that the rubber ring does not protrude inwards.
6. The sealing ring does not require special surface finishes and special machining tolerances.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of an insulated joint according to the present invention;
fig. 2 is a schematic structural view of the sealing structure of the middle insulating joint of the present invention;
in the figure: 1-short section I, 2-short section II, 3-flange I, 4-flange II, 5-insulating ring, 6-cylinder sleeve, 7-polytetrafluoroethylene ring, 8-sealing rubber ring II, 9-sealing rubber ring I and 10-clamping part.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing an insulating joint seal structure to solve the problem that prior art exists.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The insulating joint sealing structure in this embodiment is shown in fig. 1-2, and comprises a first sealing rubber ring 8, a second sealing rubber ring 9 and a polytetrafluoroethylene ring 7, wherein the insulating joint comprises a first short section 1, a second short section 2, a first flange 3, a second flange 4, an insulating ring 5 and a cylinder sleeve 6, the first short section 1 is connected with the first flange 3, the second short section 2 is connected with the second flange 4, the insulating ring 5 is arranged between the first flange 3 and the second flange 4, the first flange 3 and the second flange 4 are externally connected through the cylinder sleeve 6, the inner end of the insulating ring 5 is located in a sealing cavity, the first sealing rubber ring 8 and the second sealing rubber ring 9 are respectively embedded in the sealing cavities on two sides of the insulating ring 5, and the polytetrafluoroethylene ring 7 is embedded in the sealing cavity on the inner side of the insulating ring 5.
In this embodiment, the first seal rubber ring 8 and the second seal rubber ring 9 are symmetrically disposed on two sides of the insulation ring 5. The cross sections of the first sealing rubber ring 8 and the second sealing rubber ring 9 are both right-angled trapezoids.
In the specific embodiment, the sealing cavity comprises a first annular sealing cavity with a conical cross section and a second annular sealing cavity with a rectangular cross section, the two annular sealing cavities are positioned on the inner side of the first annular sealing cavity, the second annular sealing cavity is communicated with inner holes of a first flange 3 and a second flange 4, the width of the first annular sealing cavity is larger than that of the second annular sealing cavity, so that clamping parts 10 are formed on two sides of the second annular sealing cavity, and the clamping parts 10 are arranged to clamp the polytetrafluoroethylene ring 7, so that the first sealing rubber ring 8 and the second sealing rubber ring 9 are both limited; specifically, the inner side portion of the polytetrafluoroethylene ring 7 is embedded in the second annular sealing cavity, and the outer side portion of the polytetrafluoroethylene ring 7 is embedded in the first annular sealing cavity and is clamped on the clamping portion 10. The first sealing rubber ring 8 and the second sealing rubber ring 9 are symmetrically arranged in the first annular sealing cavity and are positioned on the outer side of the polytetrafluoroethylene ring 7. The periphery of the polytetrafluoroethylene ring 7 is also provided with an annular groove, and the inner end of the insulating ring 5 is inserted into the annular groove.
The assembly process of the insulating joint sealing structure in this embodiment is as follows:
the insulating ring 5 is arranged between the first flange 3 and the second flange 4; the insulating ring 5, the first sealing rubber ring 8, the second sealing rubber ring 9 and the polytetrafluoroethylene ring 7 are assembled in advance and then assembled between the first flange 3 and the second flange 4; after all the parts are assembled, the parts are welded and formed by applying pretightening force.
The utility model discloses in adopt the combination of trapezoidal seal rubber ring + polytetrafluoroethylene circle, because polytetrafluoroethylene has very strong insulating properties and corrosion resistance, be applicable to very much and install in the seal structure of insulating joint, the research shows: the polytetrafluoroethylene gasket is boiled in concentrated sulfuric acid, nitric acid, hydrochloric acid and even aqua regia, the weight and the performance of the polytetrafluoroethylene gasket are not changed, and the polytetrafluoroethylene gasket is almost insoluble in most solvents and completely meets the requirement of corrosion resistance. And because the fluorine atoms are uniformly distributed, the electric insulation strength is very high, and the electric insulation performance and the corrosion resistance required by the insulation joint can be just met. And the inner trapezoid sealing rubber ring is added, so that the corrosion resistance, the good electrical insulation performance and the good sealing are ensured.
The utility model discloses the principle and the implementation mode of the utility model are explained by applying the concrete examples, and the explanation of the above examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, for those skilled in the art, the idea of the present invention may be changed in the specific embodiments and the application range. In summary, the content of the present description should not be construed as a limitation of the present invention.
Claims (6)
1. An insulating joint seal structure which characterized in that: the insulating joint comprises a first sealing rubber ring, a second sealing rubber ring and a polytetrafluoroethylene ring, the first sealing rubber ring, the second sealing rubber ring and the polytetrafluoroethylene ring are connected, one short section end is connected with the first flange, the second short section end is connected with the second flange, the first flange and the second flange are arranged between the second flange, the first flange and the second flange are externally connected through the cylinder sleeve, the inner end of the insulating ring is located in a sealing cavity, the first sealing rubber ring and the second sealing rubber ring are respectively embedded in the sealing cavity on two sides of the insulating ring, and the polytetrafluoroethylene ring is embedded in the sealing cavity on the inner side of the insulating ring.
2. The insulating joint seal structure of claim 1, wherein: the first sealing rubber ring and the second sealing rubber ring are symmetrically arranged on two sides of the insulating ring.
3. The insulating joint seal structure according to claim 2, wherein: the cross sections of the first sealing rubber ring and the second sealing rubber ring are both right-angled trapezoids.
4. The insulating joint seal structure according to claim 3, wherein: the sealing cavity comprises a first annular sealing cavity with a conical cross section and a second annular sealing cavity with a rectangular cross section, the two positions of the annular sealing cavity are located on the inner side of the first annular sealing cavity, the second annular sealing cavity is communicated with the inner holes of the first flange and the second flange, the width of the first annular sealing cavity is larger than that of the second annular sealing cavity, the two sides of the second annular sealing cavity form a clamping part, the inner part of a polytetrafluoroethylene ring is embedded in the second annular sealing cavity, and the outer part of the polytetrafluoroethylene ring is embedded in the first annular sealing cavity and clamped on the clamping part.
5. The insulating joint seal structure according to claim 4, wherein: the first sealing rubber ring and the second sealing rubber ring are symmetrically arranged in the first annular sealing cavity and are positioned on the outer side of the polytetrafluoroethylene ring.
6. The insulating joint seal structure according to claim 1, wherein: the periphery of the polytetrafluoroethylene ring is also provided with an annular groove, and the bottom of the insulating ring is inserted into the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221802615.2U CN217683780U (en) | 2022-07-13 | 2022-07-13 | Insulating joint sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221802615.2U CN217683780U (en) | 2022-07-13 | 2022-07-13 | Insulating joint sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217683780U true CN217683780U (en) | 2022-10-28 |
Family
ID=83718476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221802615.2U Active CN217683780U (en) | 2022-07-13 | 2022-07-13 | Insulating joint sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217683780U (en) |
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2022
- 2022-07-13 CN CN202221802615.2U patent/CN217683780U/en active Active
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