CN111578013A - Insulating short pipe - Google Patents
Insulating short pipe Download PDFInfo
- Publication number
- CN111578013A CN111578013A CN202010435451.3A CN202010435451A CN111578013A CN 111578013 A CN111578013 A CN 111578013A CN 202010435451 A CN202010435451 A CN 202010435451A CN 111578013 A CN111578013 A CN 111578013A
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- China
- Prior art keywords
- flange
- insulating
- flange assembly
- groove
- short
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/02—Electrically insulating joints or couplings
- F16L25/026—Electrically insulating joints or couplings for flanged joints
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
Abstract
The invention relates to the technical field of pressure pipeline elements, in particular to an insulation short pipe, which comprises: a mid-flange assembly for providing an insulated channel; the end flange assemblies are arranged at two end parts of the middle flange assembly and are communicated with the station pipeline; the insulating ring is arranged at the joint of the middle flange assembly and the end flange assembly; the end face of the insulating ring and the end flange assembly is provided with a first sealing area; and the second sealing areas are arranged on the end face of the middle flange assembly and above the first sealing area of the end flange assembly. The insulating short pipe of this scheme of adoption has solved among the prior art oil gas transportation process and has restricted the insulating section size in the pipeline because of the finite thickness of insulating ring, and required pipeline insulating section length size requirement when unable satisfying this type of medium of transport finally leads to the problem that both ends pipeline switched on.
Description
Technical Field
The invention relates to the technical field of pressure pipeline elements, in particular to an insulation short pipe.
Background
A pressure pipeline element with insulating property for electrochemical protection is arranged in steel pipeline engineering for conveying oil gas, a station pipeline is insulated from a conveying pipeline, and the situation that normal work of station equipment and instruments is influenced or even damaged by protection current loaded on the conveying pipeline is prevented. However, when the resistivity of the oil-gas medium conveyed by the pipeline is low, in the prior art, the insulation rings are only insulated, the pipelines at two ends are conducted due to the limited thickness of the insulation rings, and the insulation between the station and two ends of the conveying pipeline cannot be established under the conveying working condition environment, so that the working and running safety of station equipment is damaged.
In view of the above, there is a need to improve a transmission pipeline in the prior art, so as to solve the problem that the size of an insulation section in the pipeline is limited due to the limited thickness of an insulation ring in the oil-gas transmission process, and the size requirement of the length of the insulation section of the pipeline required when the medium is transmitted cannot be met, and finally, pipelines at two ends are conducted.
Disclosure of Invention
The invention aims to solve the problem that the size of an insulating section in a pipeline is limited due to the limited thickness of an insulating ring in the oil-gas conveying process in the prior art, the size requirement of the length of the insulating section of the pipeline required when the medium is conveyed cannot be met, and finally pipelines at two ends are conducted, and provides an insulating short pipe.
The technical scheme for realizing the purpose of the invention is as follows:
an insulating stub, comprising:
a mid-flange assembly for providing an insulated channel;
the end flange assemblies are arranged at two end parts of the middle flange assembly and are communicated with the station pipeline;
the insulating ring is arranged at the joint of the middle flange assembly and the end flange assembly;
the end face of the insulating ring and the end flange assembly is provided with a first sealing area;
and the second sealing areas are arranged on the end face of the middle flange assembly and above the first sealing area of the end flange assembly.
Furthermore, the middle flange assembly comprises a flange and a short pipe, the flange is welded at two ends of the short pipe, a first groove is formed in the circumferential direction of the end face of the flange, a second sealing ring is arranged in the first groove, and linings with insulating properties are arranged on the inner wall of the short pipe and the end face of the flange.
Furthermore, the end flange assembly comprises an end flange and an end short pipe, the end flange is welded with the end short pipe, a second groove and a third groove are respectively formed in the circumferential direction of the end face of the end flange, and a first sealing ring and a third sealing ring are respectively arranged in the second groove and the third groove.
Furthermore, the lining is made of one or more organic high molecular compounds, and the thickness of the lining is 1-6 mm.
Furthermore, a fourth groove is formed in the surface, in contact with the lining, of the insulating ring along the circumferential direction, and a fourth sealing ring is arranged in the fourth groove.
Furthermore, the middle flange assembly is provided with a plurality of middle flange assemblies, the middle flange assemblies and the end flange assemblies and the middle flange assemblies are connected through bolts, and the two ends of each bolt are provided with insulating pads on the surfaces contacted with the flanges.
Furthermore, the surge protector is further included, the surge protector is installed at the flange connection positions of the middle flange assembly and the end flange assembly, the middle flange assembly and the middle flange assembly, connecting pieces are arranged on the outer surfaces of the short pipe and the end short pipe, and two ends of the surge protector are connected with the connecting pieces at two ends of the flange connection positions respectively.
Furthermore, the inner diameter of the end flange assembly is 100-800 mm.
Furthermore, a first sealing ring and a fourth sealing ring are respectively arranged in the second groove and the fourth groove to form a first sealing area; and a second sealing ring and a third sealing ring are respectively arranged in the first groove and the third groove to form a second sealing area.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the insulating short pipe, the insulating pipeline is provided through the arranged middle flange assembly; the end flange assemblies are respectively arranged at two ends of the middle flange assembly and used for transporting oil gas, the insulating rings are arranged at the connecting positions between the middle flange assembly and the end flange assembly, and the first sealing area and the second sealing area are respectively arranged on the flange end faces of the middle flange assembly and the end flange assembly and on the insulating rings, so that the problem that pipelines at two ends are conducted finally due to the fact that the size of an insulating section in a pipeline is limited due to the limited thickness of the insulating rings in the prior art and the size requirement of the length of the insulating section of the pipeline needed when the medium is transported is solved.
(2) According to the insulating short pipe, the insulating lining can be provided with different materials and thicknesses according to the characteristics of different media, the requirements of suitable technical indexes are met, the insulating requirements of various conveying pipelines are met, in addition, the short pipe of the flange component can be used for designing and manufacturing the length size of the corresponding middle flange component according to the length size required by a low-resistivity medium to reach a certain resistance value, and the required resistance value index is reached.
(3) According to the insulating short pipe, when the medium resistivity is extremely low, or the diameter size of a pipeline is small, and the length of a single middle flange component cannot reach the required length due to the limitation of technological means, a plurality of middle flange components can be combined, so that the total length after combination reaches the required size, and the contradiction between technical indexes and technological difficulty is solved.
(4) According to the insulating short pipe, the surge protector is arranged at the joint of each flange, so that the insulating material can be prevented from being damaged or destroyed due to lightning attack.
(5) The insulating short pipe is provided with two sealing areas for ensuring the oil-gas sealing performance in the oil-gas conveying process, oil gas is prevented from leaking from a gap when passing through the flange joint of the short pipe, the first sealing area performs first-stage sealing on the oil gas, and in order to further ensure the sealing performance, the second sealing area is also arranged, and sealing rings for enhancing the sealing performance are adopted for sealing, so that the reliability is improved.
Drawings
FIG. 1 is a schematic structural view of a short insulating pipe according to the present invention;
FIG. 2 is a schematic structural view of a mid-flange assembly of the present invention;
FIG. 3 is a schematic structural view of an end flange assembly of the present invention;
FIG. 4 is a schematic view of the structure of the insulating ring at the flange joint of the present invention;
FIG. 5 is a schematic view of the construction of the short insulating pipe of the present invention with multiple sets of flange assemblies installed;
FIG. 6 is a schematic view of the construction of the surge protector mounted short insulating pipe of the present invention;
wherein, 1, a middle flange component; 101. a middle flange; 102. a middle short pipe; 103. a liner; 104. a first groove; 2. an end flange assembly; 201. an end flange; 202. a short end pipe; 203. a second groove; 204. a third groove; 3. an insulating ring; 301. a fourth groove; 4. an insulating pad; 5. a bolt; 6. a first seal ring; 7. a second seal ring; 8. connecting sheets; 9. a surge protector.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; 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 creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
Example 1
Referring to fig. 1, the short insulating pipe of the present embodiment includes: the middle flange assembly 1 is used for providing an insulation channel; the end flange assemblies 2 are arranged at two ends of the middle flange assembly 1, and are communicated with the station pipeline; the insulating ring 3 is arranged at the joint of the middle flange assembly 1 and the end flange assembly 2; the end face of the insulating ring 3 and the end flange assembly 2 is provided with a first sealing area; and the second sealing areas are arranged on the end face of the middle flange component 1 and above the first sealing area of the end face of the end flange component 2.
Specifically, as shown in fig. 2, the middle flange assembly 1 includes a flange 101 and a short pipe 102, the flange 101 is welded to both ends of the short pipe 102, a first groove 104 is formed along the circumferential direction of the end surface of the flange 101, a second seal ring 7 is disposed in the first groove 104, and liners 103 having insulating properties are disposed on the inner wall of the short pipe 102 and the end surface of the flange 101; as shown in fig. 3, the end flange assembly 2 includes an end flange 201 and an end stub 202, the end flange 201 is welded to the end stub 202, a second groove 203 and a third groove 204 are respectively formed along the circumferential direction of the end surface of the end flange 201, and a first seal ring 6 and a third seal ring are respectively arranged in the second groove 203 and the third groove 204; as shown in fig. 4, a fourth groove 301 is circumferentially formed on a surface of the insulating ring 3 that contacts the liner 103, and a fourth sealing ring is disposed in the fourth groove 301.
In practical application, the middle flange assembly 1 and the end flange assembly 2 are both preferably made of steel materials, by adopting the scheme, the medium flange assembly 1 and a medium contact surface are provided with the complete insulating lining 103, the end face of the flange 101 and the end face of the end flange 201 are insulated by the insulating ring 3, and the insulating pad 4 is used for mutually insulating the connected flange 101, the end flange 201 and the bolt 5. Therefore, the insulating length equal to the length of the middle flange assembly 1 is formed on the inner wall and the outer part, the insulating length is the length of the middle flange assembly 1, the insulating length can be designed and manufactured according to the resistivity of various media such as gas, liquid, gas-liquid two-phase, gas-liquid-solid three-phase and the like conveyed by a pipeline and the resistance value required between a station and pipelines at two ends of conveying, and the problem that the pipeline for conveying the medium with lower resistivity cannot be insulated in the prior art is simply and conveniently solved.
Furthermore, the material of the liner 103 is selected from one or more organic polymer compounds, and the thickness thereof is 1-6 mm. The insulating lining is made of different materials, different processes and different thicknesses, so that different performance indexes can be achieved, and the use requirements of media with different characteristics on the insulating lining layer can be met.
Example 2
Compared with the embodiment 1, the short insulation pipe of the embodiment further comprises, with reference to fig. 5, a plurality of middle flange assemblies 1, the middle flange assemblies 1 and the end flange assemblies 2, and the middle flange assemblies 1 are connected through bolts 5, and the surfaces of two ends of each bolt 5, which are in contact with the flanges, are provided with insulation pads 4.
Specifically, a plurality of bolt through holes are formed in the flange 101 of the middle flange assembly 1 and the end flange 201 of the end flange assembly 2, a plurality of bolts 5 penetrate through the bolt through holes to connect the middle flange assembly 1 with the end flange assembly 2, the middle flange assembly 1 with the middle flange assembly 1, the length of the insulating section is increased in a combined mode, the harsh requirements of a low-resistivity medium conveying pipeline on the insulating length can be met, and the production, the manufacture and the installation are simple and convenient.
Wherein the joint between the middle flange assembly 1 and the middle flange assembly 1 is also provided with an insulating ring 3.
Example 3
Referring to fig. 6, compared with embodiment 2, the short insulating pipe of this embodiment further includes a surge protector 9, the surge protector 9 is installed at the flange connection positions of the middle flange assembly 1 and the end flange assembly 2, and the middle flange assembly 1, wherein connection pieces 8 are respectively installed on the outer surfaces of the short pipe 102 and the end short pipe 202, and two ends of the surge protector 9 are respectively connected with the connection pieces 8 located at two ends of the flange connection positions. When the pipeline at any end of the embodiment is struck by lightning or disturbed by other factors to suddenly generate peak current or voltage, the surge protector 9 can be conducted and shunted in a very short time, so that the damage of accidental surge to each insulating part in the technical scheme of the invention is avoided, and the invention can be continuously and normally used.
Furthermore, the internal diameter of end flange subassembly 2 is 100~800mm, can set welding end, flange end or clamp end etc. according to the engineering needs with pipeline and station pipeline connection's both ends, can also install between the pipeline of different bores, and the connected mode is various, and the installation is maintained conveniently.
A first sealing ring 6 and a fourth sealing ring which are respectively arranged in the second groove 203 and the fourth groove 301 form a first sealing area; the second sealing ring 7 and the third sealing ring which are respectively arranged in the first groove 104 and the third groove 204 form a second sealing area, two stages of sealing areas are arranged for ensuring the oil-gas sealing performance in the oil-gas conveying process, when oil gas passes through the flange joint of the short pipe, the oil gas is prevented from leaking from the gap, the first sealing area is used for sealing the oil gas in a first stage, the inside medium is prevented from leaking outwards, the second sealing area is further arranged for further ensuring the sealing performance, the sealing ring with the enhanced sealing performance is used for sealing, and the sealing reliability is improved.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. An insulating stub, comprising:
a central flange assembly (1), the central flange assembly (1) being used for providing an insulating channel;
the end flange assemblies (2) are arranged at two ends of the middle flange assembly (1) and communicated with the station pipeline;
the insulating ring (3) is arranged at the joint of the middle flange assembly (1) and the end flange assembly (2);
the end face of the insulating ring (3) and the end flange assembly (2) is provided with a first sealing area;
and the second sealing areas are arranged on the end face of the middle flange component (1) and above the first sealing area of the end face of the end flange component (2).
2. A short insulation pipe according to claim 1, wherein the middle flange assembly (1) comprises a flange (101) and a short pipe (102), the flange (101) is welded to both ends of the short pipe (102), a first groove (104) is formed along the circumferential direction of the end face of the flange (101), a second sealing ring (7) is arranged in the first groove (104), and liners (103) with insulating property are arranged on the inner wall of the short pipe (102) and the end face of the flange (101).
3. A short insulation pipe according to claim 1, wherein the end flange assembly (2) comprises an end flange (201) and a short end pipe (202), the end flange (201) is welded to the short end pipe (202), a second groove (203) and a third groove (204) are respectively formed along the circumferential direction of the end face of the end flange (201), and a first sealing ring (6) and a third sealing ring are respectively arranged in the second groove (203) and the third groove (204).
4. A short insulating pipe according to claim 2, wherein the lining (103) is made of one or more organic high molecular compounds and has a thickness of 1-6 mm.
5. A spool according to claim 2, characterized in that the insulating ring (3) is provided with a fourth groove (301) along the circumferential direction on the side in contact with the lining (103), and a fourth sealing ring is arranged in the fourth groove (301).
6. An insulation spool according to any one of claims 1-5, characterized in that the number of the middle flange assemblies (1) is several, the middle flange assemblies (1) and the end flange assemblies (2) and the middle flange assemblies (1) are connected through bolts (5), and the surfaces of two ends of each bolt (5) contacting with the flanges are provided with insulation pads (4).
7. A short insulation pipe according to claim 6, further comprising a surge protector (9), wherein the surge protector (9) is installed at the flange connection positions of the middle flange component (1) and the end flange component (2), the middle flange component (1) and the middle flange component (1), connecting pieces (8) are arranged on the outer surfaces of the short pipe (102) and the end short pipe (202), and two ends of the surge protector (9) are respectively connected with the connecting pieces (8) at two ends of the flange connection positions.
8. A spool according to claim 7 wherein the end flange assembly (2) has an internal diameter of 100 to 800 mm.
9. A spool according to any of claims 1-5 wherein the first (6) and fourth (301) sealing rings in the second (203) and fourth (301) grooves, respectively, form a first sealing zone; and a second sealing ring (7) and a third sealing ring which are respectively arranged in the first groove (104) and the third groove (204) form a second sealing area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010435451.3A CN111578013A (en) | 2020-05-21 | 2020-05-21 | Insulating short pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010435451.3A CN111578013A (en) | 2020-05-21 | 2020-05-21 | Insulating short pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111578013A true CN111578013A (en) | 2020-08-25 |
Family
ID=72126971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010435451.3A Pending CN111578013A (en) | 2020-05-21 | 2020-05-21 | Insulating short pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111578013A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112212104A (en) * | 2020-09-03 | 2021-01-12 | 中国神华能源股份有限公司国华电力分公司 | Generator stator catchment pipe port connection structure |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2610996A1 (en) * | 1976-03-16 | 1977-09-22 | Georg Walz | Electrically insulated pipe connection - has O:ring seals in contact with flexibly mounted seal plate |
| CN2128332Y (en) * | 1992-01-27 | 1993-03-17 | 大庆石油管理局油田建设设计研究院 | Lined insulation flange |
| US5316320A (en) * | 1992-03-18 | 1994-05-31 | Corrosion Control Corp. | Isolation gasket for critical service flow line applications |
| CN101813223A (en) * | 2010-05-10 | 2010-08-25 | 苏州市燃气设备阀门制造有限公司 | Insulating joint |
| CN103899883A (en) * | 2014-04-03 | 2014-07-02 | 中国石油集团工程设计有限责任公司 | Oil and gas pipeline comprehensive protection method for high-voltage direct-current grounding electrode interference |
| CN205315908U (en) * | 2015-12-04 | 2016-06-15 | 湖北恒通石化设备有限公司 | Super high voltage insulation connects |
| CN206918492U (en) * | 2017-07-17 | 2018-01-23 | 西安泵阀总厂有限公司 | A kind of pipeline atomization seal |
| CN108167559A (en) * | 2017-12-28 | 2018-06-15 | 湖北泰和石化设备有限公司 | A kind of ultralow temperature high voltage insulation joint |
-
2020
- 2020-05-21 CN CN202010435451.3A patent/CN111578013A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2610996A1 (en) * | 1976-03-16 | 1977-09-22 | Georg Walz | Electrically insulated pipe connection - has O:ring seals in contact with flexibly mounted seal plate |
| CN2128332Y (en) * | 1992-01-27 | 1993-03-17 | 大庆石油管理局油田建设设计研究院 | Lined insulation flange |
| US5316320A (en) * | 1992-03-18 | 1994-05-31 | Corrosion Control Corp. | Isolation gasket for critical service flow line applications |
| CN101813223A (en) * | 2010-05-10 | 2010-08-25 | 苏州市燃气设备阀门制造有限公司 | Insulating joint |
| CN103899883A (en) * | 2014-04-03 | 2014-07-02 | 中国石油集团工程设计有限责任公司 | Oil and gas pipeline comprehensive protection method for high-voltage direct-current grounding electrode interference |
| CN205315908U (en) * | 2015-12-04 | 2016-06-15 | 湖北恒通石化设备有限公司 | Super high voltage insulation connects |
| CN206918492U (en) * | 2017-07-17 | 2018-01-23 | 西安泵阀总厂有限公司 | A kind of pipeline atomization seal |
| CN108167559A (en) * | 2017-12-28 | 2018-06-15 | 湖北泰和石化设备有限公司 | A kind of ultralow temperature high voltage insulation joint |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112212104A (en) * | 2020-09-03 | 2021-01-12 | 中国神华能源股份有限公司国华电力分公司 | Generator stator catchment pipe port connection structure |
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Application publication date: 20200825 |
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