CN220652952U - Novel end structure of medium-high voltage cable - Google Patents
Novel end structure of medium-high voltage cable Download PDFInfo
- Publication number
- CN220652952U CN220652952U CN202321761331.8U CN202321761331U CN220652952U CN 220652952 U CN220652952 U CN 220652952U CN 202321761331 U CN202321761331 U CN 202321761331U CN 220652952 U CN220652952 U CN 220652952U
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- cable
- high voltage
- stress
- insulating
- pipe
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- 239000010410 layer Substances 0.000 claims abstract description 38
- 239000003292 glue Substances 0.000 claims abstract description 30
- 238000009413 insulation Methods 0.000 claims abstract description 16
- 239000004020 conductor Substances 0.000 claims abstract description 7
- 239000011241 protective layer Substances 0.000 claims abstract description 7
- 230000015556 catabolic process Effects 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000005684 electric field Effects 0.000 abstract description 11
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Cable Accessories (AREA)
Abstract
The utility model discloses a novel end structure of a medium-high voltage cable, which comprises a cable; the cable comprises a cable conductor, a cable inner shielding layer, an insulating layer and a cable outer shielding layer which are sequentially connected from inside to outside; the cable comprises a wrapping structure arranged on the outer side of the cable end; the wrapping structure comprises an insulating tube, a stress evacuation tube and an insulating protective layer; the insulation pipe is arranged on the outer side of the cable outer shielding layer, and the end part of the insulation pipe is connected with the end part of the insulation pipe, which is provided with a stress evacuation glue I; a stress pipe is wrapped outside the stress evacuation glue I; the stress evacuation pipe is provided with a stress evacuation glue II at the end position; the wrapping structure further comprises an insulating protective layer arranged on the outermost layer of the cable end position. This patent is from reasonable structural design, has not only improved the electric field distribution condition of middle-high voltage cable semi-conductive layer end department, makes electric field strength be in the best state, has still increased the insulating thickness of cable end through the insulating tube, avoids middle-high voltage cable to break down in high voltage resistant test and in-service use.
Description
Technical Field
The utility model relates to a novel end structure of a medium-high voltage cable, and belongs to the technical field of cable industry.
Background
In the cable industry, the medium-high voltage cable has been widely used, the technology is also mature and stable, but in the actual use process or electrical performance detection, the processing of the end of the medium-high voltage cable is generally performed through a heat shrinkage piece or a cold shrinkage piece, the traditional processing mode often causes conditions of voltage breakdown of the end and the like in the actual process, and not only causes shutdown and production halt, but also further wastes manpower and material resources for reprocessing the end. The utility model provides an improve the parcel mode of stress evacuation glue, semiconductive stress pipe, insulating tube, not only improved the electric field distribution condition of medium-high voltage cable semiconductive layer end department, made electric field strength be in best state, still increased the insulating thickness of cable end through the insulating tube, avoided medium-high voltage cable to break down in high voltage resistant test and in-service use.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a novel end head structure of a medium-high voltage cable, thereby solving the technical problems.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the end head structure of the novel medium-high voltage cable comprises a cable conductor, a cable inner shielding layer, an insulating layer and a cable outer shielding layer, wherein the cable conductor, the cable inner shielding layer, the insulating layer and the cable outer shielding layer are sequentially connected from inside to outside; the end head structure comprises a wrapping structure arranged on the outer side of the middle-high voltage cable end head; the wrapping structure comprises an insulating tube, a stress evacuation tube and an insulating protective layer; the insulation pipe is arranged on the outer side of the cable outer shielding layer, and the end part of the insulation pipe is connected with the end part of the insulation pipe, and is provided with a stress evacuation glue I; a stress evacuation pipe is wrapped outside the stress evacuation glue; the stress evacuation pipe is provided with a stress evacuation glue II at the end position; the wrapping structure further comprises an insulating protective layer arranged on the outermost layer of the end position of the medium-high voltage cable.
Furthermore, the stress dispersing glue is wrapped at the root connecting position of the insulating tube and the cable semiconductor layer, is arranged in a cavity formed at the lower end of the insulating tube and the outermost side of the middle-high voltage cable, and is used for stress dispersing and improving good bonding strength.
Further, the end position of the stress evacuation pipe is propped against the outer side of the end position of the insulating pipe, and the thickness of the stress evacuation pipe is 0.5mm-1mm.
Further, the insulation thickness of the insulation tube is not less than 2mm, and the breakdown strength is not less than 25KV/mm.
Furthermore, the stress evacuating glue I and the insulating tube are integrally horn-shaped and are used for evacuating an electric field near the semiconductive layer, so that the field intensity is concentrated, and the breakdown of the semiconductive end is avoided.
Further, the second stress dispersing glue is wound around the joint of the stress dispersing pipe and the insulating pipe, and the distance between the two ends of the stress dispersing glue wound around the fracture of the stress dispersing pipe is not less than 1cm.
The beneficial effects of the utility model are as follows: this patent is from reasonable structural design, has not only improved the electric field distribution condition of middle-high voltage cable semi-conductive layer end department, makes electric field strength be in the best state, has still increased the insulating thickness of cable end through the insulating tube, avoids middle-high voltage cable to break down in high voltage resistant test and in-service use.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the internal structure of the present utility model;
fig. 3 is a schematic enlarged view of the internal structure of the present utility model.
In the figure: 1. 1-1 parts of medium-high voltage cable, 1-2 parts of cable conductor, 1-3 parts of cable inner shielding layer, 1-3 parts of insulating layer, 2 parts of wrapping structure, 2-1 parts of stress dispersing glue I, 2-2 parts of stress dispersing pipe, 2-3 parts of insulating pipe, 2-4 parts of stress dispersing glue II, 2-5 parts of insulating sheath.
Detailed Description
The present utility model will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs, and the terms used herein in this description of the utility model are for the purpose of describing particular embodiments only and are not intended to be limiting of the utility model.
As shown in fig. 1, 2 and 3, the novel end structure of the medium-high voltage cable comprises a cable conductor 1-1, a cable inner shielding layer 1-2, an insulating layer 1-3 and a cable outer shielding layer positioned at the outermost side, which are sequentially connected from inside to outside, wherein the cable conductor 1-1 is a cable core; the end head structure comprises a wrapping structure 2 arranged on the outer side of the end head of the medium-high voltage cable 1; the wrapping structure 2 comprises an insulating tube 2-3, a stress evacuation tube 2-2 and an insulating protective layer 2-5; the insulation pipe 2-3 is arranged on the outer side of the cable outer shielding layer, and the end part of the insulation pipe is connected with the end part of the insulation pipe, and is provided with a stress evacuation glue 1 2-1; the stress evacuation glue I2-1 is wrapped with a stress evacuation pipe 2-2 near the outer side; the stress evacuation pipe 2-2 is provided with a stress evacuation glue two 2-4 at the end position; the wrapping structure 2 further comprises an insulating protective layer 2-5 arranged on the outermost layer of the end position of the medium-high voltage cable 1.
In this embodiment, preferably, the stress evacuation glue 1 2-1 is wrapped at the root connection position of the insulating tube 2-3 and the cable semiconductor layer, and is disposed in the cavity formed by the insulating tube 2-3, the lower end of the stress evacuation tube 2-2 and the outermost side of the medium-high voltage cable 1, and is used for stress evacuation and improving good bonding strength.
In this embodiment, preferably, the end position of the stress evacuation tube 2-2 abuts against the outer side of the end position of the insulating tube 2-3, the stress evacuation tube 2-2 has thermal shrinkage, and the thermal shrinkage ratio is 2:1, the tensile strength of the stress tube is more than or equal to 13Mpa, the surface resistance of the semiconductive material is 500-3000 Ω, the thickness of the semiconductive material is 0.5-1.0 mm, and the heat shrinkage tube and the semiconductive layer of the cable can be well connected, so that the electric field at the fracture of the semiconductive layer of the cable can be dispersed, and the electric field strength is in the best state.
In this embodiment, the insulating tube 2-3 preferably has thermal shrinkage, and the thermal shrinkage ratio is 2:1, the thickness of the insulating tube is not less than 2mm, the volume resistivity is not less than 1 multiplied by 1016 omega.m, and the breakdown strength is not less than 25kV/mm.
In this embodiment, the stress evacuation glue 2-1 and the insulating tube 2-3 are preferably horn-shaped integrally, and are used for evacuating an electric field near the semiconductive layer, so as to avoid field strength concentration and breakdown of the semiconductive terminal.
In this embodiment, preferably, the second stress dispersing glue 2-4 is wound around the junction of the stress dispersing pipe 2-2 and the insulating pipe 2-3, and the distance between the two ends of the stress dispersing glue 2-4 wound around the fracture of the stress dispersing pipe 2-2 is not less than 1cm. Has the functions of dispersing and filling electric stress and has good bonding strength. The tensile strength of the stress evacuation adhesive is more than or equal to 1.0Mpa, the elongation at break is more than or equal to 1000%, and the volume resistivity is more than or equal to 2.0X1011 Ω cm.
The stress dispersing glue 2-1 in the mechanism is wound on the root of the cable semi-conductive layer, plays a role in stress dispersing, and has good bonding strength. The tensile strength of the stress evacuation adhesive is more than or equal to 1.0Mpa, the elongation at break is more than or equal to 1000%, and the volume resistivity is more than or equal to 2.0 multiplied by 1011 Ω cm.
The stress evacuation glue 2-1 and the insulating tube 2-3 can form a horn shape, so that an electric field near the semiconductive layer is effectively evacuated, and the field intensity is prevented from being concentrated, so that the semiconductive end is broken down. The section of the stress evacuation tube 2-2 is arranged outside the insulating tube 2-3, the field intensity at the section is concentrated, and the insulating tube can increase the breakdown capability of the insulating layer at the end of the cable.
2-5 of insulating sheath, having thermal shrinkage, thermal shrinkage multiplying power is 2:1, the volume resistivity of the insulating tube is more than or equal to 1 multiplied by 1016 omega.m, and the insulating tube plays a role in wrapping stress evacuation glue and the insulating tube.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the utility model.
Claims (6)
1. The end head structure of a novel medium-high voltage cable, wherein the medium-high voltage cable (1) comprises a cable conductor (1-1), a cable inner shielding layer (1-2), an insulating layer (1-3) and a cable outer shielding layer which are sequentially connected from inside to outside; the terminal structure is characterized by comprising a wrapping structure (2) arranged at the outer side of the terminal of the medium-high voltage cable (1); the wrapping structure (2) comprises an insulating tube (2-3), a stress evacuation tube (2-2) and an insulating sheath (2-5); the insulation pipe (2-3) is arranged at the outer side of the cable outer shielding layer, and the end part of the insulation pipe is connected with the end part of the insulation pipe, and is provided with a stress evacuation glue I (2-1); the stress evacuation glue I (2-1) is wrapped with a stress evacuation pipe (2-2) near the outer side; the stress evacuation pipe (2-2) is provided with a stress evacuation glue II (2-4) at the end position; the wrapping structure (2) further comprises an insulating protective layer (2-5) arranged on the outermost layer of the end position of the medium-high voltage cable (1).
2. The novel end head structure of the medium-high voltage cable according to claim 1, wherein the stress evacuation glue I (2-1) is wrapped at the root connection position of the insulating tube (2-3) and the cable semiconductor layer, and is arranged in a cavity formed at the lower end of the insulating tube (2-3), the lower end of the stress evacuation tube (2-2) and the outermost side of the medium-high voltage cable (1).
3. The end structure of the novel medium-high voltage cable according to claim 1, wherein the end position of the stress evacuation tube (2-2) is abutted against the outer side of the end position of the insulating tube (2-3), and the thickness of the end structure is 0.5mm-1mm.
4. The end head structure of the novel medium-high voltage cable according to claim 1, wherein the insulation thickness of the insulation tube (2-3) is not less than 2mm, and the breakdown strength is not less than 25KV/mm.
5. The end head structure of the novel medium-high voltage cable according to claim 1, wherein the stress evacuation glue I (2-1) and the insulating tube (2-3) are integrally horn-shaped.
6. The end head structure of the novel medium-high voltage cable according to claim 1, wherein the stress evacuation glue two (2-4) is wound around the joint of the stress evacuation pipe (2-2) and the insulating pipe (2-3), and the distance between the two ends of the stress evacuation glue two (2-4) wound around the fracture of the stress evacuation pipe (2-2) is not less than 1cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321761331.8U CN220652952U (en) | 2023-07-06 | 2023-07-06 | Novel end structure of medium-high voltage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321761331.8U CN220652952U (en) | 2023-07-06 | 2023-07-06 | Novel end structure of medium-high voltage cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220652952U true CN220652952U (en) | 2024-03-22 |
Family
ID=90286262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321761331.8U Active CN220652952U (en) | 2023-07-06 | 2023-07-06 | Novel end structure of medium-high voltage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220652952U (en) |
-
2023
- 2023-07-06 CN CN202321761331.8U patent/CN220652952U/en active Active
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