CN220020639U - Three-core medium-voltage power cable with grounded copper conductor - Google Patents
Three-core medium-voltage power cable with grounded copper conductor Download PDFInfo
- Publication number
- CN220020639U CN220020639U CN202321184138.2U CN202321184138U CN220020639U CN 220020639 U CN220020639 U CN 220020639U CN 202321184138 U CN202321184138 U CN 202321184138U CN 220020639 U CN220020639 U CN 220020639U
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- CN
- China
- Prior art keywords
- shielding layer
- copper
- conductor
- core
- copper conductor
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 76
- 239000010949 copper Substances 0.000 title claims abstract description 76
- 239000004020 conductor Substances 0.000 title claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000000945 filler Substances 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 4
- 230000017105 transposition Effects 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 238000004804 winding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 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 discloses a grounded copper conductor three-core medium-voltage power cable, which comprises three twisted insulated wire cores, wherein each insulated wire core comprises a phase conductor, a conductor shielding layer, an insulating shielding layer and a copper strip shielding layer from inside to outside, a grounded copper conductor is arranged at the junction of two adjacent wire cores, the grounded copper conductor is in close contact with the adjacent copper strip shielding layer, a non-hygroscopic filling material is filled outside the three wire cores, the periphery of the non-hygroscopic filling material is filled round and then wrapped Bao Daiceng, and an outer sheath is arranged outside a wrapping belt layer; the utility model has excellent insulating property, and can optimize the fault current of the shielding layer besides the advantages of copper wires shielding the medium-voltage power cable. The investment of working procedures and equipment is reduced, the processing is easy, and the production efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a three-core medium-voltage pressure cable with a grounded copper conductor.
Background
The metal shield plays a role in homogenizing a magnetic field in the medium-voltage power cable, reducing external electromagnetic interference and the like. When the short-circuit current exceeds a certain value due to the short-circuit of the system, the copper strip shielding cannot be satisfied, and a 'sparse winding copper wire' or 'sparse winding copper wire+copper strip' structure is adopted. The shielding effect of the copper wire is far better than that of other modes, and the continuity is reliable.
When the three-phase three-core cable is applied to a 3-phase system, three single-core cables are laid in a triangle or are laid after being cabled together, and in the circulation and cabling process, the problems that external factors damage copper wires or semi-conductive shielding layers (such as scratch and the like) and occupation space are large, laying difficulty is increased, cost of related accessories is increased and the like can be encountered. Therefore, the three-core copper wire shielding medium-voltage power cable has the advantages of high processing difficulty and low production efficiency, and cannot be put into production and used on a large scale at present.
Disclosure of Invention
The utility model aims to solve the technical problem and provides a three-core medium-voltage pressure cable with a grounded copper conductor.
The technical scheme adopted by the utility model is as follows: including three insulated wire core that the transposition is in the same place, every insulated wire core is from interior to outside all including phase conductor, conductor shielding layer, insulating shielding layer and copper strips shielding layer, adjacent copper strips shielding layer in close contact, and the juncture of two adjacent insulated wire cores is provided with ground connection copper conductor, ground connection copper conductor and adjacent copper strips shielding layer in close contact, three insulated wire core and ground connection copper conductor clearance packing non-hygroscopicity filler material, and around package Bao Daiceng after the periphery packing rounding of non-hygroscopicity filler material, the band layer is equipped with the oversheath outward.
Preferably, the thickness of the conductor shielding layer is 0.6-1 mm.
Preferably, the thickness of the insulating shielding layer is 0.6-1 mm.
Preferably, the thickness of the copper strip shielding layer is 0.1mm, the copper strip shielding layer is overlapped and wrapped outside the insulating shielding layer, and the overlapping rate is 10-15%.
Preferably, the outer sheath is extruded and molded by an extruder at one time, and the thickness of the outer sheath is not less than 1.8mm.
Preferably, the non-hygroscopic filling material is provided as a filling strip with a sector-shaped section, so as to realize clamping and fixing of the insulating wire core and the grounding copper conductor.
Preferably, the grounding copper conductor is set as soft bare copper stranded wires, and three soft bare copper stranded wires are uniformly distributed in the middle of the insulated wire core at 120 degrees and are in close contact with the copper strip shielding layer.
The utility model has the beneficial effects that: the utility model has excellent insulating property, and can optimize the fault current of the shielding layer besides the advantages of copper wires shielding the medium-voltage power cable. The investment of working procedures and equipment is reduced, the processing is easy, and the production efficiency is improved. And wrapping a copper strip after extruding the semiconductive insulating shielding layer, wherein 3 soft bare conductor copper stranded wires are evenly distributed in the middle of the insulating wire core and are tightly contacted with the copper strip shielding when the multi-core cable is formed. And realizing the mutual contact of bare copper stranded wires.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic structural view of a non-hygroscopic filler material according to the present utility model;
FIG. 3 is a comparison of FIG. 2 in an embodiment of the present utility model;
the marks in the figure: 1. the cable comprises an insulating cable core, 2, a grounding copper conductor, 3, a non-hygroscopic filling material, 4, a wrapping tape layer, 5, an outer sheath, 6, a phase line conductor, 7, a conductor shielding layer, 8, an insulating layer, 9, an insulating shielding layer, 10 and a copper strip shielding layer.
Detailed Description
As shown in fig. 1, a three-core medium voltage power cable with grounded copper conductors comprises three twisted insulated wire cores 1, wherein each insulated wire core 1 comprises a phase conductor 6, a conductor shielding layer 7, an insulating layer 8, an insulating shielding layer 9 and a copper strip shielding layer 10 from inside to outside, adjacent copper strip shielding layers 10 are in close contact, a grounded copper conductor 2 is arranged at the junction of two adjacent insulated wire cores, and the grounded copper conductor 2 does not transmit electric energy in the cable and only bears system short-circuit current. The copper conductor 2 closely contacts with the adjacent copper strip shielding layer 10, the three insulating wire cores and the copper conductor 2 are in clearance filling with the non-hygroscopic filling material 3, the non-hygroscopic filling material 3 is arranged into a filling strip (shown in fig. 2) with a fan-shaped cross section, the inner ring of the fan-shaped filling strip is arranged into an arc structure, the copper conductor 2 is tightly clamped and fixed on the periphery of the insulating wire core 1 through the arc structure, the non-hygroscopic filling material 3 is arranged through the structure, compared with the traditional fan-shaped structure (shown in fig. 3), the clamping and fixing of the insulating wire core and the copper conductor are more favorably realized, the fixing effect is better, meanwhile, the periphery of the fan-shaped filling strip is also arranged into the arc structure, the periphery of the adjacent non-hygroscopic filling material 3 is filled and spliced to form a round periphery, the periphery is round and then wrapped with the wrapping belt layer 4, and the outer sheath 5 is arranged outside the wrapping belt layer 4.
Further, the thickness of the conductor shielding layer 7 is 0.6-1 mm, so as to homogenize an electric field formed when the conductor is electrified.
Further, the thickness of the insulating shielding layer 9 is 0.6-1 mm, so as to homogenize the electric field formed by the insulating layer.
Further, the thickness of the copper strip shielding layer 10 is 0.1mm, the copper strip shielding layer is overlapped and wrapped outside the insulating shielding layer 9, the overlapping rate is 10-15%, and the copper strip shielding layer is used for shielding interference of an external electromagnetic field and achieving mutual contact of bare copper stranded wires.
Still further, the outer sheath 5 is extruded by an extruder at one time, and the thickness of the outer sheath 5 is not less than 1.8mm.
Still further, the grounding copper conductor 2 is configured as soft bare copper stranded wires, and three soft bare copper stranded wires are uniformly distributed in the middle of the insulated wire core 1 at 120 degrees and are in close contact with the copper strip shielding layer 10.
According to the utility model, a process of combining 3 circular non-compressed bare copper conductors and copper strip shielding is adopted, and the resistance of 3 concentric stranded bare copper stranded wires is easier to control than that of the traditional sparse winding copper wire shielding resistance, so that the resistance is smaller, and the fault short-circuit current is further improved. The bare copper stranded wires are adopted, and generally 7 monofilaments are concentrically stranded into a round non-compressed conductor, so that the conductor is relatively stable and is not easy to damage. The utility model uses bare copper stranded wires to replace the sparse winding copper wire shielding process, so that a corresponding frame strander is not required to be equipped. The production procedures are reduced, and the production equipment and the labor investment are reduced. And when the device is used in a three-phase system, the occupied space is small, and the construction and the laying are more convenient. The cable provided by the structure of the utility model has excellent insulating performance, and can optimize the fault current of the shielding layer besides the advantages of the copper wire shielding medium-voltage power cable. The investment of working procedures and equipment is reduced, the processing is easy, and the production efficiency is improved. The production and manufacturing technology level of the cable is improved, the product reaches the leading technology level, and the industry level is also driven to be improved.
Claims (7)
1. The utility model provides a ground connection copper conductor three-core medium voltage power cable which characterized in that: including three insulating core (1) that the transposition is in the same place, every insulating core (1) all includes phase conductor (6), conductor shielding layer (7), insulating layer (8), insulating shielding layer (9) and copper strips shielding layer (10) from inside to outside, adjacent copper strips shielding layer (10) in close contact with, and the juncture of two adjacent insulating core is provided with ground connection copper conductor (2), ground connection copper conductor (2) and adjacent copper strips shielding layer (10) in close contact with, three insulating core and ground connection copper conductor (2) clearance packing non-hygroscopicity filler material (3), and around package Bao Daiceng (4) after the periphery packing rounding of non-hygroscopicity filler material (3), be equipped with oversheath (5) outside band layer (4).
2. A grounded copper conductor three-core medium voltage power cable according to claim 1, wherein: the thickness of the conductor shielding layer (7) is 0.6-1 mm.
3. A grounded copper conductor three-core medium voltage power cable according to claim 1, wherein: the thickness of the insulating shielding layer (9) is 0.6-1 mm.
4. A grounded copper conductor three-core medium voltage power cable according to claim 1, wherein: the thickness of the copper strip shielding layer (10) is 0.1mm, the copper strip shielding layer is overlapped and wrapped outside the insulating shielding layer (9), and the overlapping rate is 10-15%.
5. A grounded copper conductor three-core medium voltage power cable according to claim 1, wherein: the outer sheath (5) is formed by one-step extrusion of an extruder, and the thickness of the outer sheath (5) is not less than 1.8mm.
6. A grounded copper conductor three-core medium voltage power cable according to claim 1, wherein: the non-hygroscopic filling material (3) is provided with a filling strip with a sector-shaped section so as to realize clamping and fixing of the insulating wire core (1) and the grounding copper conductor (2).
7. A grounded copper conductor three-core medium voltage power cable according to claim 1, wherein: the grounding copper conductor (2) is arranged as soft bare copper stranded wires, and three soft bare copper stranded wires are uniformly distributed in the middle of the insulated wire core (1) at an angle of 120 degrees and are in close contact with the copper strip shielding layer (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321184138.2U CN220020639U (en) | 2023-05-17 | 2023-05-17 | Three-core medium-voltage power cable with grounded copper conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321184138.2U CN220020639U (en) | 2023-05-17 | 2023-05-17 | Three-core medium-voltage power cable with grounded copper conductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220020639U true CN220020639U (en) | 2023-11-14 |
Family
ID=88671433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321184138.2U Active CN220020639U (en) | 2023-05-17 | 2023-05-17 | Three-core medium-voltage power cable with grounded copper conductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220020639U (en) |
-
2023
- 2023-05-17 CN CN202321184138.2U patent/CN220020639U/en active Active
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