CN214064110U - Oil gas pipeline insulation joint - Google Patents
Oil gas pipeline insulation joint Download PDFInfo
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- CN214064110U CN214064110U CN202022406376.6U CN202022406376U CN214064110U CN 214064110 U CN214064110 U CN 214064110U CN 202022406376 U CN202022406376 U CN 202022406376U CN 214064110 U CN214064110 U CN 214064110U
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Abstract
The application provides an oil gas pipeline insulation joint belongs to insulation joint technical field. According to the insulating joint provided by the embodiment of the application, the first flange is connected with the second flange through the first annular groove and the first annular protrusion, and the gap between the first annular groove and the first annular protrusion is filled with the insulating filler, so that when the insulating joint is subjected to radial stress, the insulating filler can play a supporting role in the gap, and the relative position between the first flange and the second flange is ensured to be unchanged; in the outside of first flange and second flange, still enclose to be equipped with and collude the circle, should collude fixed connection between circle and the first flange, and be connected through the annular groove of second and the annular arch of second between the second flange to also can guarantee the second flange and collude the relative position between the circle unchangeable, make this insulating joint non-deformable when receiving stress, its inside insulating ring also can not warp because of receiving the extrusion, thereby guaranteed this insulating joint's sealing performance.
Description
Technical Field
The application relates to the technical field of insulating joints, in particular to an oil and gas pipeline insulating joint.
Background
For buried long oil and gas pipelines, in order to prevent the pipelines from being corroded, perforated and damaged, a cathode protection device needs to be applied to the pipelines so as to ensure the safe, reliable and effective operation of the pipelines, and therefore an insulation joint needs to be adopted to limit an external current on the protected pipelines.
The insulation joint commonly used at present comprises two flanges, the two flanges are respectively connected with the end parts of two pipelines to be connected, a sealing gasket is arranged between the two flanges, and the sealing gasket is made of an insulation material; and the bolts, the nuts and the flanges are mutually insulated by adopting an insulating sleeve with steps.
Since the pipeline usually extends for hundreds or thousands of kilometers, some stress is inevitably generated in the structural material during the processing, transportation, installation and use of the pipeline, and when the insulating joint is subjected to a large axial stress, the axial stress may exceed the limit of the compressive force which can be borne by the insulating gasket, so that the insulating gasket loses elasticity, and the sealing performance is reduced; when the insulating joint is subjected to a large radial stress, the radial stress may cause the sealing performance of one side of the insulating gasket to be reduced due to the loss of elasticity, and the sealing performance of the other side of the insulating gasket to be reduced due to an excessively large gap between the insulating gasket and the flange.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides an oil and gas pipeline insulating joint, can guarantee this insulating joint's sealing performance. The technical scheme is as follows:
there is provided an oil and gas pipeline insulated joint, the insulated joint comprising: the flange comprises a first flange, a second flange, a hook ring, a plurality of insulating rings and insulating filler;
the inner end face of the first flange is provided with a first annular groove, and the outer end face of the first flange is fixedly connected with a first pipeline;
the inner end face of the second flange is provided with a first annular bulge matched with the first annular groove, the outer end face of the second flange is used for being fixedly connected with a second pipeline, and the side wall of the second flange is provided with a second annular groove;
the inner end face of the first flange is connected with the inner end face of the second flange, the first annular protrusion is inserted into the first annular groove, two insulating rings are arranged between the inner end face of the first flange and the inner end face of the second flange, and insulating filler is filled in a gap between the first annular groove and the first annular protrusion;
should collude the circle and be cyclic annular, should collude have on the inner wall of circle with the cyclic annular arch of the second of the cyclic annular groove looks adaptation of this second, should collude the circle and include: at least two splices;
the at least two splicing pieces are used for being sleeved outside the first flange and the second flange and spliced together, the outer wall of the first flange is fixedly connected with the inner wall of the hook ring, at least two insulating rings are arranged between the outer wall of the second flange and the inner wall of the hook ring, and insulating filler is filled in a gap between the second annular protrusion and the second annular groove.
In one possible design, the outer diameter of the first flange is greater than the outer diameter of the second flange;
and insulating filler is filled at the joint between the outer wall of the first flange, the outer wall of the second flange and the hook ring.
In one possible design, the first flange includes: a tube body portion and a connecting portion;
the pipe body part is used for being fixedly connected with the first pipeline, and the connecting part is used for being connected with the second flange;
the outer diameter of the pipe body part is smaller than that of the connecting part, and a transition inclined plane is arranged at the connecting position of the outer wall of the pipe body part and the outer wall of the connecting part.
In one possible design, the first annular groove and the second annular groove are both rectangular in cross-section.
In one possible design, the cross-section of the first annular groove and the second annular groove each comprise: a semicircular ring part and a rectangular part;
the semicircular ring part is positioned on the inner side of the rectangular part.
In a possible design, the outer wall of the first flange and the inner wall of the hook ring are fixedly connected through welding.
In one possible embodiment, the hook ring has a latching ring, which latches onto the outside of the second flange.
In one possible design, the insulated joint further includes: and the anticorrosive inner coating is used for coating the inner walls of the first flange and the second flange.
In one possible design, the insulated joint further includes: and the heat shrink tube is fixedly connected to the first flange, the second flange and the outer wall of the hook ring in a thermoplastic mode.
In one possible design, the insulated joint further includes: an overvoltage protector;
the two ends of the overvoltage protector are respectively connected to the outer wall of the hook ring and the outer wall of the second flange.
According to the insulating joint provided by the embodiment of the application, the first flange is connected with the second flange through the first annular groove and the first annular protrusion, and the gap between the first annular groove and the first annular protrusion is filled with the insulating filler, so that when the insulating joint is subjected to radial stress, the insulating filler can play a supporting role in the gap, and the relative position between the first flange and the second flange is ensured to be unchanged; in the outside of first flange and second flange, still enclose and be equipped with and collude the circle, should collude fixed connection between circle and the first flange, be connected through the annular groove of second and the annular arch of second between the second flange, and still pack in the gap between the annular groove of second and the annular arch of second and have insulating filler, thereby make this insulating joint when receiving axial stress, this insulating filler can play supporting role in the gap, guarantee the second flange and collude the relative position between the circle unchangeably, thereby guaranteed this insulating joint non-deformable when receiving stress, its inside isolating ring also can not warp because of receiving the extrusion, thereby guaranteed this insulating joint's sealing performance.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an oil and gas pipeline insulation joint provided by an embodiment of the application;
FIG. 2 is a schematic structural view of a single-side cross section of an oil and gas pipeline insulation joint provided by an embodiment of the application;
FIG. 3 is a schematic diagram of a single-side cross-sectional structure of another oil and gas pipeline insulated joint provided by an embodiment of the application.
The reference numerals for the various parts in the drawings are illustrated below:
1-a first flange;
11-a first annular groove;
12-a body portion;
13-a connecting part;
2-a second flange;
21-a first annular projection;
22-a second annular groove;
3-hooking the ring;
31-a second annular projection;
32-a locking ring;
4-an insulating ring;
5-insulating filler;
6-anticorrosion inner coating;
7-heat shrinkable tube;
8-overvoltage protector.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Fig. 1 is a schematic structural diagram of an oil and gas pipeline insulation joint provided in an embodiment of the present application, please refer to fig. 1, the insulation joint includes: the flange structure comprises a first flange 1, a second flange 2, a hook ring 3, a plurality of insulating rings 4 and insulating filler 5; the inner end face of the first flange 1 is provided with a first annular groove 11, and the outer end face of the first flange 1 is used for being fixedly connected with a first pipeline; a first annular protrusion 21 matched with the first annular groove 11 is arranged on the inner end surface of the second flange 2, the outer end surface of the second flange 2 is used for fixedly connecting with a second pipeline, and a second annular groove 22 is arranged on the side wall of the second flange 2; the inner end face of the first flange 1 is connected with the inner end face of the second flange 2, the first annular protrusion 21 is inserted into the first annular groove 11, two insulating rings 4 are arranged between the inner end face of the first flange 1 and the inner end face of the second flange 2, and a gap between the first annular groove 11 and the first annular protrusion 21 is filled with an insulating filler 5; should collude circle 3 and be cyclic annular, should collude the annular bulge 31 of second that has on the inner wall of circle 3 and this second annular groove 22 looks adaptation, should collude circle 3 and include: at least two splices; the at least two splicing pieces are used for being sleeved outside the first flange 1 and the second flange 2 and spliced together, the outer wall of the first flange 1 and the inner wall of the hook ring 3 are fixedly connected, at least two insulating rings 4 are arranged between the outer wall of the second flange 2 and the inner wall of the hook ring 3, and insulating fillers 5 are filled in a gap between the second annular protrusion 31 and the second annular groove 22.
The working principle of the insulated joint is described in detail below:
in the use of this insulating joint, need earlier this first flange 1 with wait to be connected first pipeline fixed connection, with second flange 2 with second pipeline fixed connection back, connect first flange 1 and second flange 2 again to realize the connection between first pipeline and the second pipeline through first flange 1 and second flange 2, and first flange 1 and second flange 2 still play insulating and sealed effect. At least two splicing pieces which are to hook the ring 3 are coated on the first flange 1 and the second flange 2 to form an annular hook ring 3, so that the fixing function and the coating and sealing functions are realized.
According to the insulating joint provided by the embodiment of the application, the first flange 1 is connected with the second flange 2 through the first annular groove 11 and the first annular protrusion 21, and the gap between the first annular groove 11 and the first annular protrusion 21 is filled with the insulating filler 5, so that when the insulating joint is subjected to radial stress, the insulating filler 5 can play a supporting role in the gap, and the relative position between the first flange 1 and the second flange 2 is ensured to be unchanged; in the outside of first flange 1 and second flange 2, still enclose to be equipped with and collude circle 3, should collude fixed connection between circle 3 and the first flange 1, be connected through second annular groove 22 and the annular protruding 31 of second between the second flange 2, and still fill in the gap between the annular protruding 31 of second annular groove 22 and second and have insulating filler 5, thereby make this insulating joint when receiving axial stress, this insulating filler 5 can play the supporting role in the gap, guarantee second flange 2 and collude the relative position between the circle 3 unchangeably, thereby guaranteed this insulating joint non-deformable when receiving stress, its inside insulating ring 4 also can not warp because of receiving the extrusion, thereby guaranteed this insulating joint's sealing performance.
The following details the structure and the working principle of each part of the insulated joint:
in a possible design, the first flange 1 and the first pipeline to be connected are fixedly connected in a welding mode, further, the welding firmness can be improved in a mode of welding after a groove is cut at the position to be welded, and the connection mode between the second flange 2 and the second pipeline to be connected is the same as that of the first flange and the second pipeline to be connected, and is not repeated herein.
In one possible design, the outer diameter of the first flange 1 is greater than the outer diameter of the second flange 2; and the joints among the outer wall of the first flange 1, the outer wall of the second flange 2 and the hook ring 3 are filled with insulating fillers 5.
Above-mentioned insulating filler 5 can play insulating and supported effect, can avoid axial stress and radial stress to first flange 1, second flange 2 and collude the change of the relative position between the 3 three of circle to protect insulator ring 4 between first flange 1 and the second flange 2, prevent that insulator ring 4 warp because of receiving too big pressure, the leakproofness reduces.
In one possible design, the first flange 1 comprises: a body portion 12 and a connecting portion 13; the pipe body part 12 is used for being fixedly connected with the first pipeline, and the connecting part 13 is used for being connected with the second flange 2; the outer diameter of the pipe body 12 is smaller than that of the connecting part 13, and the joint of the outer wall of the pipe body 12 and the outer wall of the connecting part 13 has a transition slope.
In the above structure, the first flange 1 is a variable diameter structure, the diameter of the pipe body 12 may be the same as that of the first pipeline, so as to facilitate the connection between the pipe body 12 and the first pipeline, and the diameter of the connecting portion 13 is greater than that of the pipe body 12, so as to provide a larger contact surface for the connection between the first flange 1 and the second flange 2, so that the connection may be firmer, and the sealing performance of the connection between the first flange 1 and the second flange may also be improved. And the arrangement of the transition inclined plane between the pipe body part 12 and the connecting part 13 can avoid the stress concentration to twist off the first flange 1, thereby prolonging the service life of the first flange 1.
Fig. 2 is a schematic diagram of a single-side cross-sectional structure of an oil and gas pipeline insulation joint provided by an embodiment of the present application, please refer to fig. 2, in a possible design, the cross sections of the first annular groove 11 and the second annular groove 22 are both rectangular, and this structure is convenient for processing, installation and filling of the insulation packing 5.
In the above structure, the width of the cross section of the first annular groove 11 in the radial direction may be 2-4 times the wall thickness of the first pipe, and the first annular groove 11 may be disposed at a distance 2-6 times the wall thickness of the first pipe from the inner surface of the pipe, so that the first annular groove 11 can better bear stress and prevent the first flange 1 and the second flange 2 from deforming.
Fig. 3 is a schematic diagram of a single-side cross-sectional structure of another oil and gas pipeline insulation joint provided by an embodiment of the present application, please refer to fig. 3, in a possible design, a cross section of each of the first annular groove 11 and the second annular groove 22 includes: a semicircular ring part and a rectangular part; the semicircular ring part is positioned on the inner side of the rectangular part, wherein the diameter of the semicircular ring part is equal to the width of the rectangular part, so that the connecting part between the semicircular ring part and the rectangular part is in smooth transition. This structure is easy to process, also easy to install, and can make the filling of insulating filler 5 more sufficient.
In the above structure, the width of the cross section of the first annular groove 11 in the radial direction may be 2-4 times the wall thickness of the first pipe, and the first annular groove 11 may be disposed at a distance 2-6 times the wall thickness of the first pipe from the inner surface of the pipe, so that the first annular groove 11 can better bear stress and prevent the first flange 1 and the second flange 2 from deforming.
In a possible design, the outer wall of the first flange 1 and the inner wall of the hook ring 3 are fixedly connected in a welding mode, so that the connection is firmer and the sealing performance is good.
In one possible design, the hook ring 3 has a locking ring 32, and the locking ring 32 is locked on the outer side of the second flange 2, so that the sealing performance of the insulating joint is further improved.
In one possible design, the insulated joint further includes: and the anticorrosion inner coating 6 is used for coating the inner walls of the first flange 1 and the second flange 2 and preventing the first flange 1 and the second flange 2 from being corroded due to long-term contact with oil gas.
In one possible design, the insulated joint further includes: and the heat shrinkable tube 7 is used for being fixedly connected to the outer walls of the first flange 1, the second flange 2 and the hook ring 3 in a thermoplastic mode. The heat shrinkable tube 7 is used for isolating external soil, air, rainwater or other impurities, and can protect the first flange 1, the second flange 2 and the hook ring 3 from being abraded or oxidized.
In one possible design, the insulated joint further includes: an overvoltage protector 8; the two ends of the overvoltage protector 8 are respectively connected to the outer wall of the hook ring 3 and the outer wall of the second flange 2. The overvoltage protector 8 is used for detecting whether electric leakage exists on the outer wall of the insulated joint or not, and sending the information to corresponding output equipment through wires or wireless signals for reference of technicians.
All the above optional technical solutions may be combined arbitrarily to form optional embodiments of the present application, and are not described herein again.
According to the insulating joint provided by the embodiment of the application, the first flange 1 is connected with the second flange 2 through the first annular groove 11 and the first annular protrusion 21, and the gap between the first annular groove 11 and the first annular protrusion 21 is filled with the insulating filler 5, so that when the insulating joint is subjected to radial stress, the insulating filler 5 can play a supporting role in the gap, and the relative position between the first flange 1 and the second flange 2 is ensured to be unchanged; in the outside of first flange 1 and second flange 2, still enclose to be equipped with and collude circle 3, should collude fixed connection between circle 3 and the first flange 1, be connected through second annular groove 22 and the annular protruding 31 of second between the second flange 2, and still fill in the gap between the annular protruding 31 of second annular groove 22 and second and have insulating filler 5, thereby make this insulating joint when receiving axial stress, this insulating filler 5 can play the supporting role in the gap, guarantee second flange 2 and collude the relative position between the circle 3 unchangeably, thereby guaranteed this insulating joint non-deformable when receiving stress, its inside insulating ring 4 also can not warp because of receiving the extrusion, thereby guaranteed this insulating joint's sealing performance.
Furthermore, the hook ring 3 has a locking ring 32, and the locking ring 32 is locked at the outer side of the second flange 2, so that the sealing performance of the insulating joint is further improved.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. An insulated joint for an oil and gas pipeline, the insulated joint comprising: the flange structure comprises a first flange (1), a second flange (2), a hook ring (3), a plurality of insulating rings (4) and insulating filler (5);
the inner end face of the first flange (1) is provided with a first annular groove (11), and the outer end face of the first flange (1) is fixedly connected with a first pipeline;
a first annular protrusion (21) matched with the first annular groove (11) is arranged on the inner end face of the second flange (2), the outer end face of the second flange (2) is used for being fixedly connected with a second pipeline, and a second annular groove (22) is arranged on the side wall of the second flange (2);
the inner end face of the first flange (1) is connected with the inner end face of the second flange (2), the first annular protrusion (21) is inserted into the first annular groove (11), two insulating rings (4) are arranged between the inner end face of the first flange (1) and the inner end face of the second flange (2), and insulating fillers (5) are filled in a gap between the first annular groove (11) and the first annular protrusion (21);
collude circle (3) and be cyclic annular, collude have on the inner wall of circle (3) with the cyclic annular arch of second (31) of the cyclic annular recess of second (22) looks adaptation, collude circle (3) and include: at least two splices;
the two splicing pieces are used for being sleeved outside the first flange (1) and the second flange (2) and spliced together, the outer wall of the first flange (1) is fixedly connected with the inner wall of the hook ring (3), the outer wall of the second flange (2) is provided with at least two insulating rings (4) between the inner walls of the hook ring (3), and the gap between the second annular protrusion (31) and the second annular groove (22) is filled with insulating filler (5).
2. The insulating joint according to claim 1, characterized in that the outer diameter of the first flange (1) is greater than the outer diameter of the second flange (2);
and the joints among the outer wall of the first flange (1), the outer wall of the second flange (2) and the hook ring (3) are filled with insulating fillers (5).
3. The insulating joint according to claim 1, characterized in that said first flange (1) comprises: a pipe body (12) and a connecting part (13);
the pipe body part (12) is fixedly connected with the first pipeline, and the connecting part (13) is connected with the second flange (2);
the outer diameter of the pipe body part (12) is smaller than that of the connecting part (13), and a transition inclined plane is arranged at the connecting part of the outer wall of the pipe body part (12) and the outer wall of the connecting part (13).
4. The insulating joint according to claim 1, characterized in that the first annular groove (11) and the second annular groove (22) are both rectangular in cross section.
5. The insulating joint according to claim 1, characterized in that the cross-section of the first annular groove (11) and of the second annular groove (22) each comprises: a semicircular ring part and a rectangular part;
the semicircular ring part is positioned on the inner side of the rectangular part.
6. The insulated joint according to claim 1, characterized in that the outer wall of the first flange (1) and the inner wall of the hook ring (3) are fixedly connected by welding.
7. Insulating joint according to claim 1, characterized in that the hooking ring (3) has a blocking ring (32), the blocking ring (32) being blocked on the outside of the second flange (2).
8. The insulated joint of claim 1, further comprising: and the anticorrosion inner coating (6) is coated on the inner walls of the first flange (1) and the second flange (2).
9. The insulated joint of claim 1, further comprising: and the heat shrink tube (7) is fixedly connected to the outer walls of the first flange (1), the second flange (2) and the hook ring (3) in a thermoplastic mode.
10. The insulated joint of claim 1, further comprising: an overvoltage protector (8);
and two ends of the overvoltage protector (8) are respectively connected to the outer wall of the hook ring (3) and the outer wall of the second flange (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022406376.6U CN214064110U (en) | 2020-10-26 | 2020-10-26 | Oil gas pipeline insulation joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022406376.6U CN214064110U (en) | 2020-10-26 | 2020-10-26 | Oil gas pipeline insulation joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214064110U true CN214064110U (en) | 2021-08-27 |
Family
ID=77397678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022406376.6U Active CN214064110U (en) | 2020-10-26 | 2020-10-26 | Oil gas pipeline insulation joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214064110U (en) |
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2020
- 2020-10-26 CN CN202022406376.6U patent/CN214064110U/en active Active
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