CN117438830B - Lengthened 110kV joint - Google Patents
Lengthened 110kV joint Download PDFInfo
- Publication number
- CN117438830B CN117438830B CN202311369264.XA CN202311369264A CN117438830B CN 117438830 B CN117438830 B CN 117438830B CN 202311369264 A CN202311369264 A CN 202311369264A CN 117438830 B CN117438830 B CN 117438830B
- Authority
- CN
- China
- Prior art keywords
- shielding
- prefabricated joint
- stress cone
- assembly
- joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000004020 conductor Substances 0.000 claims abstract description 19
- 238000009413 insulation Methods 0.000 claims abstract description 18
- 239000012212 insulator Substances 0.000 claims abstract description 7
- 230000000712 assembly Effects 0.000 claims abstract description 5
- 238000000429 assembly Methods 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 230000005684 electric field Effects 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 150000003376 silicon Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The invention discloses an lengthened 110kV joint, which comprises an insulator assembly, wherein the insulator assembly comprises an insulation combination prefabricated joint and a straight-through combination prefabricated joint, and a cable is axially connected in the insulation combination prefabricated joint and the straight-through combination prefabricated joint; the adjacent sides of the insulating combined prefabricated joint and the straight-through combined prefabricated joint are connected with the conductor in a plug-in mode through the contact finger assembly; stress cone assemblies are symmetrically connected inside adjacent sides of the insulating combined prefabricated joint and the straight-through combined prefabricated joint, and the cable is fixedly connected inside the stress cone assemblies; the outer side of the conductor is also provided with a shielding assembly, the shielding assembly comprises a short shielding and a long shielding, the short shielding is fixedly connected to the end part of the stress cone assembly, and the long shielding is arranged between the short shielding. The length of the connector can be adjusted as required, and the connector is suitable for the condition that the cables at the middle section cannot be connected in a butt joint mode, and is simple to operate and convenient to install.
Description
Technical Field
The invention relates to the technical field of power cable accessories, in particular to an elongated 110kV joint.
Background
With the rapid development of economy, the urban and industrialized processes are accelerated, and the degree of dependence of society on electricity is continuously improved. The existing urban power transmission and distribution mostly adopts cable lines, the operation management and maintenance of the cable lines plays an important role in the stability and safety of power supply, and the defects of the installation quality and protection of the power cable inevitably cause faults.
When the cable fails, the cable needs to be subjected to switching treatment by adopting a repair connector. In the prior art, a long epoxy is adopted in order to meet the requirements of on-site rush repair and larger cable spacing, and the long epoxy is heavy, so that the production requirement is high and the installation difficulty is high in the actual use and installation process; and if the length of fault section exceeds the applicable length of current product, the interlude cable length is fixed, can appear unable condition of docking, consequently this patent provides an elongated 110kV and connects and solves above-mentioned problem.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an lengthened 110kV joint.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
An elongated 110kV joint comprises an insulator assembly, wherein the insulator assembly comprises an insulation combination precast joint and a straight-through combination precast joint, and a cable is axially connected in the insulation combination precast joint and the straight-through combination precast joint; the adjacent sides of the insulating combined prefabricated joint and the straight-through combined prefabricated joint are connected with the conductor in a plug-in mode through the contact finger assembly;
Stress cone assemblies are symmetrically connected inside adjacent sides of the insulating combined prefabricated joint and the straight-through combined prefabricated joint, and the cable is fixedly connected inside the stress cone assemblies;
the outer side of the conductor is also provided with a shielding assembly, the shielding assembly comprises a short shielding and a long shielding, the short shielding is fixedly connected to the end part of the stress cone assembly, and the long shielding is arranged between the short shielding.
Further, the stress cone assembly comprises a stress cone, a cone support and a pressure spring assembly, wherein the stress cone is arranged on one side close to the conductor and is connected to the cone support, and the cone support is respectively connected to the insulation combination prefabricated joint and the straight-through combination prefabricated joint through the pressure spring assembly.
Furthermore, the stress cone is made of silicon rubber material modified by nano SiC doping.
Further, the end part of the stress cone is a rounded corner, the curvature radius of the end part is 10mm, the curvature radius of the stress cone curve is 110mm, and the slope of the stress cone back curve is between 0.13 and 0.20.
Further, the slope of the stress cone back curve is 0.15.
Further, the insulation combination prefabricated joint and the outside of the straight-through combination prefabricated joint are detachably provided with second protective shells, a first protective shell is connected between the second protective shells through a connecting flange, and the first protective shell is arranged on the outer side of the shielding assembly.
Furthermore, a flange protection sleeve is arranged outside the connecting flange.
Further, the insulation combination prefabricated joint and one end of the straight-through combination prefabricated joint, which is far away from each other, are respectively provided with a sealing cover, and the outer sides of the sealing covers are connected with the two ends of the support.
Further, a pressure gauge can be connected to the sealing cover.
Further, the conductor length may be adjustable.
The beneficial effects of the invention are as follows:
1. The connector main body is formed by integrally casting high-performance epoxy resin in vacuum, is waterproof, dampproof and resistant to mechanical damage, and can avoid large installation difficulty caused by a longer epoxy component in the use process by matching the insulating combined prefabricated connector with the straight-through combined prefabricated connector, meanwhile, the two connectors are connected through conductor plug, the operation is simple, the installation is convenient, the conductor length can be adjusted according to the actual use requirement, and the application range is enlarged.
2. In theory, the shielding is preferably made into an integral structure, the outer diameter of the shielding is slightly larger than that of the cable, and the shielding is used for replacing a metal sheath, so that the rigidity of the cable is ensured, and the shielding effect of an electric field is achieved. But because the stress cone mounting process, the cone support needs to move backwards, if as a whole, the metal shielding can not move to cause that the product can not be mounted, so the shielding component is set to be short shielding and long shielding, the assembly is completed after the stress cone and the cone support are mounted, the size of the short shielding is kept unchanged, the cable is connected to the stress cone, and the long shielding is adjusted according to the cable compensation length of the requirement.
3. The nano SiC modified SIR material can ensure that the joint is used at the base temperature, has higher resistivity, the conductivity of the joint continuously rises along with the rise of the temperature, and the internal resistance value can be kept stable in a very wide frequency and temperature range.
4. When the curvature radius of the stress cone curve is 110mm, the field intensity on the stress cone curve surface and the radial field intensity on the stress cone curve surface are reduced, so that the use effect of the product is ensured.
5. Along with the increase of the slope, the field intensity on the stress cone curved surface and the radial field intensity are continuously increased, and the axial electric field intensity at the end part of the insulation interface is also continuously increased, but still within the design value of the maximum allowable axial electric field intensity. It is illustrated that slope improvement of the stress cone back curve is only effective for electric field improvement near the stress cone. Although the slope can be reduced to a certain extent to even the field intensity, the slope is too small, so that not only is the consumable material increased, but also the taper is not beneficial to the taper pressing of the stress cone, and therefore, the slope of the back curve of the stress cone is 0.15.
5. Sealing covers are arranged at the ends, far away from each other, of the insulating combined prefabricated joint and the straight-through combined prefabricated joint, nitrogen is filled in the whole protective shell in the transportation and storage processes, sealing and drying of the inside of a product are guaranteed, and the final-stage formal installation quality of the product is improved.
Drawings
Fig. 1 is a schematic structural view of an elongated 110kV connector according to the present invention;
Fig. 2 is a schematic structural diagram of the lengthened 110kV connector provided by the invention in the use process;
fig. 3 is a schematic structural diagram of the lengthened 110kV connector in the transportation process.
In the figure: 1. an insulating combined prefabricated joint; 2. straight-through combined prefabricated joint; 3. a stress cone assembly; 31. a stress cone; 32. a cone support; 33. a pressure spring assembly; 4. a contact finger assembly; 5. a shielding assembly; 51. a short shield; 52. a long shield; 6. a first protective case; 61. a flange protective sleeve; 62. a connecting flange; 7. a second protective case; 8. sealing cover; 10. a pressure gauge; 11. a conductor; 12. a bracket; 13. and (3) a cable.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1, an elongated 110kV connector includes an insulator assembly including an insulation composite precast connector 1 and a through composite precast connector 2, and a cable 13 axially connected within the insulation composite precast connector 1 and the through composite precast connector 2; the adjacent sides of the insulating combined prefabricated joint 1 and the straight-through combined prefabricated joint 2 are connected with a conductor 11 in a plug-in mode through a contact finger assembly 4;
The inside of the adjacent side of the insulating combined prefabricated joint 1 and the straight-through combined prefabricated joint 2 is symmetrically connected with a stress cone assembly 3, and a cable 13 is fixedly connected inside the stress cone assembly 3;
The joint main body is formed by integrally casting high-performance epoxy resin in vacuum, is waterproof, dampproof and resistant to mechanical damage, and can be prevented from being mounted difficultly due to a longer epoxy component in the use process by matching the insulating combined prefabricated joint with the through combined prefabricated joint, and meanwhile, the two joints are connected through conductor plug connection, so that the operation is simple and the mounting is convenient.
The outside of the conductor 11 is also provided with a shielding assembly 5, the shielding assembly 5 comprises a short shielding 51 and a long shielding 52, the short shielding 51 is fixedly connected to the end part of the stress cone assembly 3, and the long shielding 52 is arranged between the short shielding 3. In theory, the shielding is preferably made into an integral structure, the outer diameter of the shielding is slightly larger than that of the cable, and the shielding is used for replacing a metal sheath, so that the rigidity of the cable is ensured, and the shielding effect of an electric field is achieved. But because the stress cone mounting process, the cone support needs to move backwards, if as a whole, the metal shielding can not move to cause that the product can not be mounted, so the shielding component is set to be short shielding and long shielding, the assembly is completed after the stress cone and the cone support are mounted, the size of the short shielding is kept unchanged, the cable is connected to the stress cone, and the long shielding is adjusted according to the cable compensation length of the requirement.
The stress cone assembly 3 comprises a stress cone 31, a cone support 32 and a pressure spring assembly 33, wherein the stress cone 31 is arranged on one side close to the conductor 11 and is connected to the cone support 32, and the cone support 32 is respectively connected to the insulation combination precast joint 1 and the straight through combination precast joint 2 through the pressure spring assembly 33.
The stress cone 31 is made of nano SiC doped modified silicon rubber. The nano SiC modified SIR material can ensure that the joint is used at the base temperature, has higher resistivity, the conductivity of the joint continuously rises along with the rise of the temperature, and the internal resistance value can be kept stable in a very wide frequency and temperature range.
The end of the stress cone 31 is a rounded corner, the curvature radius of the end is 10mm, the curvature radius of the curve of the stress cone 31 is 110mm, and the slope of the curve of the back surface of the stress cone 31 is between 0.13 and 0.20.
When the curvature radius of the stress cone curve is 110mm, the field intensity on the stress cone curve surface and the radial field intensity on the stress cone curve surface are reduced, so that the use effect of the product is ensured.
Along with the increase of the slope, the field intensity on the stress cone curved surface and the radial field intensity are continuously increased, and the axial electric field intensity at the end part of the insulation interface is also continuously increased, but still within the design value of the maximum allowable axial electric field intensity. It is illustrated that slope improvement of the stress cone back curve is only effective for electric field improvement near the stress cone.
The slope of the back curve of the stress cone 31 is 0.15. Although the slope can be reduced to a certain extent to even the field intensity, the slope is too small, so that not only is the consumable material increased, but also the taper is not beneficial to the taper pressing of the stress cone, and therefore, the slope of the back curve of the stress cone is 0.15.
The insulation combination prefabricated joint 1 and the straight-through combination prefabricated joint 2 are both detachably mounted with a second protective shell 7, a first protective shell 6 is connected between the second protective shells 7 through a connecting flange 62, and the first protective shell 6 is arranged outside the shielding assembly 5.
The flange protection sleeve 61 is arranged outside the connecting flange 62. The cooperation of first protective housing and second protective housing is used can improve the life of joint.
The length of the conductor 11 can be adjusted. The length of the conductor can be adjusted according to the actual use requirement, and the application range is enlarged.
Referring to fig. 2, the present joint may be used in series during use.
Referring to fig. 3, in the process of transportation and storage, the insulation combination prefabricated joint 1 and the through combination prefabricated joint 2 are respectively provided with a sealing cover 8 at the end far away from each other, and the outer sides of the sealing covers 8 are connected with the two ends of the bracket 12.
The sealing cover 8 can be connected with a pressure gauge 10.
Sealing covers are arranged at the ends, far away from each other, of the insulating combined prefabricated joint and the straight-through combined prefabricated joint, nitrogen is filled in the whole protective shell in the transportation and storage processes, sealing and drying of the inside of a product are guaranteed, and the final-stage formal installation quality of the product is improved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. An elongated 110kV connector comprising an insulator assembly, characterized by: the insulator assembly comprises an insulation combination prefabricated joint (1) and a straight-through combination prefabricated joint (2), and a cable (13) is axially connected in the insulation combination prefabricated joint (1) and the straight-through combination prefabricated joint (2); the adjacent sides of the insulating combined prefabricated joint (1) and the straight-through combined prefabricated joint (2) are connected with the conductor (11) in a plug-in mode through the contact finger assembly (4);
the inside of one side adjacent to the insulating combined prefabricated joint (1) and the straight-through combined prefabricated joint (2) is symmetrically connected with a stress cone assembly (3), and the cable (13) is fixedly connected inside the stress cone assembly (3);
The conductor (11) outside still is equipped with shielding assembly (5), shielding assembly (5) are including short shielding (51) and long shielding (52), short shielding (51) fixed connection be in the tip of stress cone subassembly (3), long shielding (52) set up between short shielding (51).
2. An elongated 110kV connector according to claim 1, characterized by: the stress cone assembly (3) comprises a stress cone (31), a cone support (32) and a pressure spring assembly (33), wherein the stress cone (31) is arranged on one side close to the conductor (11) and is connected to the cone support (32), and the cone support (32) is respectively connected to the insulating combined prefabricated joint (1) and the straight-through combined prefabricated joint (2) through the pressure spring assembly (33).
3. An elongated 110kV connector according to claim 2, characterized by: the stress cone (31) is made of silicon rubber material modified by nano SiC doping.
4. An elongated 110kV connector according to claim 3, characterized by: the end part of the stress cone (31) is a rounded corner, the curvature radius of the end part is 10mm, the curvature radius of the curve of the stress cone (31) is 110mm, and the slope of the curve of the back surface of the stress cone (31) is between 0.13 and 0.20.
5. An elongated 110kV connector according to claim 4, wherein: the slope of the back curve of the stress cone (31) is 0.15.
6. An elongated 110kV connector according to claim 1, characterized by: the novel shielding assembly is characterized in that the insulation combined prefabricated joint (1) and the outside of the straight-through combined prefabricated joint (2) are detachably provided with second protective shells (7), first protective shells (6) are connected between the second protective shells (7) through connecting flanges (62), and the first protective shells (6) are arranged on the outer sides of the shielding assemblies (5).
7. An elongated 110kV connector according to claim 6, wherein: a flange protection sleeve (61) is arranged outside the connecting flange (62).
8. An elongated 110kV connector according to claim 1, characterized by: the insulation combination prefabricated joint (1) and one end that directly-through combination prefabricated joint (2) kept away from each other all are equipped with sealed lid (8), sealed lid (8) outside links to each other with the both ends of support (12).
9. An elongated 110kV connector according to claim 8, wherein: the sealing cover (8) can be connected with a pressure gauge (10).
10. An elongate 110kV connector as recited in any one of claims 1 to 9 wherein: the length of the conductor (11) can be adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311369264.XA CN117438830B (en) | 2023-10-23 | Lengthened 110kV joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311369264.XA CN117438830B (en) | 2023-10-23 | Lengthened 110kV joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117438830A CN117438830A (en) | 2024-01-23 |
| CN117438830B true CN117438830B (en) | 2024-07-05 |
Family
ID=
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167329A (en) * | 2018-11-13 | 2019-01-08 | 特变电工昭和（山东）电缆附件有限公司 | A kind of 500kV and 500kV or more AC and DC power cable combination prefabricated transition joint |
| CN109830928A (en) * | 2019-03-20 | 2019-05-31 | 江苏安靠智能输电工程科技股份有限公司 | A kind of cable combination connector |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109167329A (en) * | 2018-11-13 | 2019-01-08 | 特变电工昭和（山东）电缆附件有限公司 | A kind of 500kV and 500kV or more AC and DC power cable combination prefabricated transition joint |
| CN109830928A (en) * | 2019-03-20 | 2019-05-31 | 江苏安靠智能输电工程科技股份有限公司 | A kind of cable combination connector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207218215U (en) | The combination prefabricated transition joint of one kind ± 500kV direct current cables | |
| CN210927059U (en) | Core wire sealing structure for submersible motor | |
| CN117438830B (en) | Lengthened 110kV joint | |
| CN117438830A (en) | Lengthened 110kV joint | |
| CN203839866U (en) | Combined middle joint used for high-voltage cables | |
| CN113013828A (en) | Oil level on-line monitoring's compound cover outdoor termination | |
| CN101505047B (en) | Ultra-high voltage electric cable joint | |
| CN217281559U (en) | 150KV three-core large-current high-voltage cable | |
| CN2596639Y (en) | High voltage silicon rubber dry cable terminal | |
| CN217036726U (en) | Combined prefabricated intermediate joint for high-voltage cable | |
| CN208298585U (en) | A kind of anti-breakdown high voltage single-core cable | |
| CN112670737A (en) | Porous elbow type sleeve, manufacturing method thereof and casting mold | |
| CN210142543U (en) | Large-current composite sleeve for combined electrical appliance | |
| CN219659400U (en) | 110kV sleeve terminal stress cone grounding sealing device | |
| CN219085714U (en) | Thin-wall high-temperature-resistant cable | |
| CN219843158U (en) | Insulating tube busbar intermediate head | |
| CN214897922U (en) | Insulating sleeve | |
| CN201655525U (en) | Novel plug-pull transformer with fuse | |
| CN219801436U (en) | Coaxial cable connecting assembly with high electrical connectivity | |
| CN219872940U (en) | Anticorrosion radial water-blocking medium-voltage cable | |
| CN212209077U (en) | High-voltage dry-type sleeve for box transformer substation | |
| CN216980182U (en) | Flexible high-temperature-resistant transmission signal cable | |
| CN216311368U (en) | High-voltage box communication power supply wire harness | |
| CN200990419Y (en) | Butt connector used in middle voltage cable butt jointing system | |
| CN217903994U (en) | Medium-voltage cable intermediate head |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |