CN219575234U - High-reliability flexible high-voltage cable - Google Patents
High-reliability flexible high-voltage cable Download PDFInfo
- Publication number
- CN219575234U CN219575234U CN202320807348.6U CN202320807348U CN219575234U CN 219575234 U CN219575234 U CN 219575234U CN 202320807348 U CN202320807348 U CN 202320807348U CN 219575234 U CN219575234 U CN 219575234U
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- China
- Prior art keywords
- copper
- layer
- shielding layer
- conductor
- voltage cable
- 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.)
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000004020 conductor Substances 0.000 claims abstract description 41
- 229910052751 metal Inorganic materials 0.000 claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 38
- 229910052802 copper Inorganic materials 0.000 claims description 19
- 239000010949 copper Substances 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000004049 embossing Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 229920001903 high density polyethylene Polymers 0.000 claims description 3
- 239000004700 high-density polyethylene Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000007765 extrusion coating Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Insulated Conductors (AREA)
Abstract
The utility model relates to a high-reliability flexible high-voltage cable which comprises a conductor, wherein a conductor shielding layer, an insulating layer and an insulating shielding layer are sequentially extruded outside the conductor, a copper wire shielding layer is arranged outside the insulating shielding layer, a buffer layer is wound outside the copper wire shielding layer, a copper ring is arranged outside the buffer layer in a clearance manner, a metal sheath is arranged outside the copper ring, an outer sheath is extruded outside the metal sheath, and an electrode layer is extruded outside the outer sheath. The utility model can reduce the temperature of the contact part of the metal sheath and the semiconductive water-blocking buffer layer in the cable structure, prevent the buffer layer from being ablated and damaged due to chemical reaction, and improve the safety and flexibility in the laying process of the cable.
Description
Technical Field
The utility model relates to a cable, in particular to a flexible high-voltage cable.
Background
In the power system, a high-voltage power cable bears the main task of transmitting electric energy, and in the process of cable operation, the high voltage and the high current are high.
In the general high-voltage cable structure, the corrugated aluminum sleeve is in point contact with the semiconductive water-blocking buffer layer, when current passes through the corrugated aluminum sleeve, the locally generated heat is large, the temperature rise is rapid, and when the temperature is higher than 80 ℃, aluminum and sodium polyacrylate in the water-blocking buffer layer are subjected to chemical reaction, so that the buffer layer is damaged, and the cable structure is damaged.
Disclosure of Invention
The utility model aims to: the utility model aims to overcome the defects in the prior art, and provides the high-reliability flexible high-voltage cable which is capable of reducing the temperature of the contact part of the metal sheath and the semiconductive water-blocking buffer layer in the cable structure, preventing the buffer layer from being ablated and damaged due to chemical reaction, and improving the safety in the cable operation process and the flexibility in the laying process.
The technical scheme is as follows: in order to solve the technical problems, the high-reliability flexible high-voltage cable comprises a conductor, wherein a conductor shielding layer, an insulating layer and an insulating shielding layer are sequentially extruded outside the conductor, a copper wire shielding layer is arranged outside the insulating shielding layer, a buffer layer is wrapped outside the copper wire shielding layer, a copper ring is arranged outside the buffer layer in a clearance manner, a metal sheath is arranged outside the copper ring, an outer sheath is extruded outside the metal sheath, and an electrode layer is extruded outside the outer sheath.
Further, the conductor is a copper or aluminum conductor with a cross-sectional area S of 240mm 2 ≤S≤800mm 2 When in use, compacting is adoptedCircular structure, when S is more than or equal to 800mm 2 When the conductor is in a split conductor structure, the compression coefficient of the conductor is controlled to be 0.92-0.94.
Further, the conductor shielding layer, the insulating layer and the insulating shielding layer are formed by three layers of coextrusion, the three layers are tightly combined, and the concentricity reaches 99.9%, wherein the conductor shielding layer and the insulating shielding layer are made of semi-conductive materials.
Further, the copper wire shielding layer is evenly distributed in a gap mode outside the insulating shielding layer along the length direction of the cable, the gap value is 4-6mm, the copper wire shielding layer is composed of copper wires, the diameter of each copper wire is 0.8-1.2mm, and the total section of each copper wire is not smaller than 25mm 2 。
Further, the buffer layer is formed by overlapping and wrapping water-absorbing expansion semiconductive water-blocking tapes, the overlapping rate is not less than 30%, and the thickness of the semiconductive water-blocking tapes is not less than 2.0mm.
Further, the copper ring is sleeved outside the buffer layer in a clearance mode, the buffer layer is compressed to form an inlaid stable structure, the thickness of the copper ring is 0.2-0.5mm, the width of the copper ring is not less than 100mm, and the length of the parallel portion of the copper ring and the groove bottom of the metal sheath groove is the same.
Further, the metal sheath adopts a groove-type corrugated aluminum-copper composite metal sleeve, the aluminum-copper composite metal sleeve comprises an aluminum belt, a copper layer is tightly coated on one surface of the aluminum belt, the metal sheath is formed by longitudinally wrapping and welding, the copper layer faces inwards, grooves are formed through embossing, parallel parts at the bottom of the grooves are in contact with the copper ring, the thickness of the metal sheath is 2.0-3.0mm, and the thickness of the copper layer is 0.2-0.3mm.
Further, the outer sheath is formed by extruding high-density polyethylene or insulating polyvinyl chloride, and the thickness of the outer sheath is larger than 4.5mm.
Further, the electrode layer is formed by extruding or coating a semiconductive material.
The beneficial effects are that: compared with the prior art, the utility model has the remarkable advantages that:
(1) The aluminum-copper composite metal sleeve is formed by tightly coating a copper layer on one surface of an aluminum belt, when the metal sheath is manufactured, the copper surface faces inwards, longitudinally coated and welded, groove-shaped waves are formed through embossing, parallel parts at the bottom of the grooves are contacted with a copper ring, the lengths of the parallel parts are the same as the widths of the copper ring, the copper ring is contacted with a semiconductive water-blocking buffer layer, the contact area is large, the copper ring dissipates heat quickly, the temperature of the semiconductive water-blocking buffer layer is effectively reduced, and damage caused by heating is prevented;
(2) And a copper wire shielding layer is arranged outside the insulating shielding layer, so that the capacity of transmitting fault current is improved, and the use safety of the cable is improved.
Drawings
FIG. 1 is a schematic cross-sectional view of the present utility model;
FIG. 2 is a schematic view of the arrangement of a copper wire shield layer according to the present utility model;
FIG. 3 is a partial schematic view of the connection of a metal sheath and copper ring in accordance with the present utility model;
fig. 4 is a schematic view of a partial structure of a metal sheath according to the present utility model.
Description of the embodiments
The utility model is further described below with reference to the drawings and examples.
As shown in FIGS. 1, 2, 3 and 4, the high-reliability flexible high-voltage cable of the utility model comprises a conductor 1, wherein the conductor 1 is a copper or aluminum conductor, the sectional area of the conductor is S, and the length of the conductor is 240mm 2 ≤S≤800mm 2 When S is more than or equal to 800mm, a compressed circular structure is adopted 2 The conductor is divided into a conductor structure, the compression coefficient of the conductor is controlled to be 0.92-0.94, the conductor gap is reduced, moisture is prevented from entering, hardening in the compression process of the conductor is also reduced, the reduction of conductivity is prevented, a conductor shielding layer 2, an insulating layer 3 and an insulating shielding layer 4 are sequentially extruded outside the conductor 1, the conductor shielding layer 2, the insulating layer 3 and the insulating shielding layer 4 are formed by three layers of co-extrusion, the three layers are tightly combined, the concentricity reaches 99.9%, the conductor shielding layer 2 and the insulating shielding layer 4 are made of semi-conductive materials, the semi-conductive materials are made of EVA (ethylene-vinyl acetate) matrix materials and are added with conductive carbon black, the resistivity of the semi-conductive materials is not more than 1000 Ω & m, a copper wire shielding layer 5 is arranged outside the insulating shielding layer 4, and the copper wire shielding layer 5 is uniformly arranged outside the insulating shielding layer 4 along the length direction of a cableThe gap distribution is that the gap value is 4-6mm, the 5 copper wire shielding layer is composed of copper wires 5.1, the diameter of each copper wire 5.1 is 0.8-1.2mm, and the total section of each copper wire 5.1 is not less than 25mm 2 The buffer layer 6 is wound outside the copper wire shielding layer 5, the buffer layer 6 is formed by overlapping and winding water-swelling semiconductive water-blocking tape, the overlapping rate is not less than 30%, the thickness of the semiconductive water-blocking tape is not less than 2.0mm, the external pressure of insulation thermal expansion and the internal pressure of the cable when the cable is stressed can be buffered, the buffer layer can be compressed by 40-50%, the buffer layer swells when meeting water, the function of water blocking is achieved, a copper ring 7 is arranged in a gap outside the buffer layer 6, a metal sheath 8 is arranged outside the copper ring 7, the copper ring 7 is sleeved outside the buffer layer 6 in a gap, the buffer layer 6 is compressed to form an inlaid stable structure, the copper ring 7 has the thickness of 0.2-0.5mm, the width of the copper ring 7 is not less than 100mm, the length of the parallel part of the groove bottom of the groove of the metal sheath 8 is the groove, the metal sheath 8 adopts a groove-shaped corrugated aluminum copper composite metal sleeve, the aluminum copper composite metal sleeve comprises an aluminum tape 8.2, the copper layer 8.1 is tightly covered on one surface of the aluminum belt 8.2, the metal sheath 8 is formed by longitudinally wrapping and welding, wherein the copper layer 8.1 faces inwards and is embossed to form a groove, the parallel part at the groove bottom of the groove is contacted with the copper ring 7, the thickness of the metal sheath 8 is 2.0-3.0mm, the thickness of the copper layer is 0.2-0.3mm, the copper ring is contacted with a semiconductive water-blocking buffer layer, the contact area is large, the copper ring dissipates heat quickly, the temperature of the semiconductive water-blocking buffer layer is effectively reduced, the metal sheath is prevented from being damaged by heating, the aluminum layer structure is not directly contacted with the semiconductive water-blocking buffer layer, the length L1 of the parallel part at the groove bottom is not less than 100mm with the width of the copper ring, the height h of a corrugated crest is 4-6mm, when the cable is bent, the corrugated part can stretch to protect the metal sheath from being damaged, the corrugated pitch L2 is less than 25 times of the outer diameter of the cable, the surface of the metal sheath is coated with asphalt to prevent the metal sheath from being corroded, the outer extrusion coating of the metal sheath 8 is provided with an outer sheath 9, the outer sheath 9 is formed by extrusion coating of high-density polyethylene or insulating polyvinyl chloride, the thickness of the outer sheath 9 is greater than 4.5mm, the outer extrusion coating of the outer sheath 9 is provided with an electrode layer 10, the electrode layer 10 is formed by extrusion coating or coating of a semiconductive material, and the electrode layer plays a role of serving as an electrode in a cable test process.
According to the utility model, the groove-type corrugated aluminum-copper composite metal sleeve is adopted, a copper layer is tightly coated on one surface of an aluminum belt, when the metal sheath is manufactured, copper faces inwards, longitudinally coated and welded, groove-shaped waves are formed through embossing, parallel parts at the bottom of the groove are contacted with a copper ring, the length of the parallel parts is the same as the width of the copper ring, the parallel parts are contacted with a semiconductive water-blocking buffer layer surface through the copper ring, the contact area is large, the copper ring dissipates heat quickly, the temperature of the semiconductive water-blocking buffer layer surface is effectively reduced, and damage caused by heating is prevented; and a copper wire shielding layer is arranged outside the insulating shielding layer, so that the capacity of transmitting fault current is improved, and the use safety of the cable is improved.
The present utility model provides a method and a thought, and a method for implementing the technical scheme are numerous, the above description is only a preferred embodiment of the present utility model, and it should be noted that, for those skilled in the art, several improvements and modifications can be made, and these improvements and modifications should also be regarded as protection scope of the present utility model, and each component that is not explicitly described in the present embodiment can be implemented by the prior art.
Claims (9)
1. A high-reliability flexible high-voltage cable is characterized in that: the novel high-voltage power supply comprises a conductor (1), wherein a conductor shielding layer (2), an insulating layer (3) and an insulating shielding layer (4) are sequentially extruded outside the conductor (1), a copper wire shielding layer (5) is arranged outside the insulating shielding layer (4), a buffer layer (6) is arranged outside the copper wire shielding layer (5) in a wrapping mode, a copper ring (7) is arranged in an external gap of the buffer layer (6), a metal sheath (8) is arranged outside the copper ring (7), an outer sheath (9) is extruded outside the metal sheath (8), and an electrode layer (10) is extruded outside the outer sheath (9).
2. The high reliability flexible high voltage cable according to claim 1, wherein: the conductor (1) is a copper or aluminum conductor, the sectional area of which is S, when 240mm 2 ≤S≤800mm 2 When S is more than or equal to 800mm, a compressed circular structure is adopted 2 When using segmentationAnd the conductor structure and the conductor compression coefficient are controlled to be 0.92-0.94.
3. The high reliability flexible high voltage cable according to claim 1, wherein: the conductor shielding layer (2), the insulating layer (3) and the insulating shielding layer (4) are formed by three layers of coextrusion, the three layers are tightly combined, and the concentricity reaches 99.9%, wherein the conductor shielding layer (2) and the insulating shielding layer (4) are made of semi-conductive materials.
4. The high reliability flexible high voltage cable according to claim 1, wherein: the copper wire shielding layer (5) is uniformly distributed along the length direction of the cable outside the insulating shielding layer (4), the clearance value is 4-6mm, the copper wire shielding layer (5) consists of copper wires (5.1), the diameter of each copper wire (5.1) is 0.8-1.2mm, and the total section of each copper wire (5.1) is not less than 25mm 2 。
5. The high reliability flexible high voltage cable according to claim 1, wherein: the buffer layer (6) is formed by overlapping and wrapping water-absorbing expansion semiconductive water-blocking tapes, the overlapping rate is not less than 30%, and the thickness of the semiconductive water-blocking tapes is not less than 2.0mm.
6. The high reliability flexible high voltage cable according to claim 1, wherein: the copper ring (7) is sleeved outside the buffer layer (6) in a clearance way, the buffer layer (6) is compressed to form an embedded stable structure, the thickness of the copper ring (7) is 0.2-0.5mm, the width of the copper ring (7) is not less than 100mm, and the length of the parallel part of the copper ring and the groove bottom of the groove of the metal sheath (8) is the same.
7. The high reliability flexible high voltage cable according to claim 1, wherein: the metal sheath (8) adopts a groove-type corrugated aluminum-copper composite metal sleeve, the aluminum-copper composite metal sleeve comprises an aluminum belt (8.2), a copper layer (8.1) is tightly coated on one surface of the aluminum belt (8.2), the metal sheath (8) is formed by longitudinally wrapping and welding, the copper layer (8.1) faces inwards and forms a groove through embossing, the parallel part of the groove bottom is contacted with a copper ring (7), the thickness of the metal sheath (8) is 2.0-3.0mm, and the thickness of the copper layer is 0.2-0.3mm.
8. The high reliability flexible high voltage cable according to claim 1, wherein: the outer sheath (9) is formed by extruding high-density polyethylene or insulating polyvinyl chloride, and the thickness of the outer sheath (9) is greater than 4.5mm.
9. The high reliability flexible high voltage cable according to claim 1, wherein: the electrode layer (10) is formed by extrusion or coating of a semiconductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320807348.6U CN219575234U (en) | 2023-04-13 | 2023-04-13 | High-reliability flexible high-voltage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320807348.6U CN219575234U (en) | 2023-04-13 | 2023-04-13 | High-reliability flexible high-voltage cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219575234U true CN219575234U (en) | 2023-08-22 |
Family
ID=87669405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320807348.6U Active CN219575234U (en) | 2023-04-13 | 2023-04-13 | High-reliability flexible high-voltage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219575234U (en) |
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2023
- 2023-04-13 CN CN202320807348.6U patent/CN219575234U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214205 huankeyuan chaquan Road, Xinjie street, Yixing City, Wuxi City, Jiangsu Province Patentee after: Jiangsu Bao'an Cable Co.,Ltd. Address before: 214205 huankeyuan chaquan Road, Xinjie street, Yixing City, Wuxi City, Jiangsu Province Patentee before: JIANGSU BAOAN CABLE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A High Reliability Flexible High Voltage Cable Granted publication date: 20230822 Pledgee: Wuxi rural commercial bank Limited by Share Ltd. Yixing branch Pledgor: Jiangsu Bao'an Cable Co.,Ltd. Registration number: Y2024980010211 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |