CN221125603U - Aluminum alloy core halogen-free low-smoke high-flame-retardant medium-voltage power cable - Google Patents
Aluminum alloy core halogen-free low-smoke high-flame-retardant medium-voltage power cable Download PDFInfo
- Publication number
- CN221125603U CN221125603U CN202322830711.9U CN202322830711U CN221125603U CN 221125603 U CN221125603 U CN 221125603U CN 202322830711 U CN202322830711 U CN 202322830711U CN 221125603 U CN221125603 U CN 221125603U
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- Prior art keywords
- aluminum alloy
- layer
- flame
- halogen
- free low
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 29
- 239000003063 flame retardant Substances 0.000 title claims abstract description 29
- 239000000779 smoke Substances 0.000 title claims abstract description 26
- 239000004020 conductor Substances 0.000 claims abstract description 42
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229920000098 polyolefin Polymers 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 239000000919 ceramic Substances 0.000 claims abstract description 6
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 6
- 229910001335 Galvanized steel Inorganic materials 0.000 claims abstract description 5
- 239000008397 galvanized steel Substances 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims abstract description 5
- 239000004703 cross-linked polyethylene Substances 0.000 claims abstract description 4
- 229920003020 cross-linked polyethylene Polymers 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 239000004743 Polypropylene Substances 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 7
- 229920001155 polypropylene Polymers 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000002500 effect on skin Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
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- Insulated Conductors (AREA)
Abstract
An aluminum alloy core halogen-free low-smoke high-flame-retardance medium-voltage power cable belongs to the technical field of cables, and comprises a cable core, a flame-retardant tape wrapping layer, a halogen-free low-smoke flame-retardance polyolefin isolation sleeve, a ceramic silicon rubber flame-retardant layer, a galvanized steel tape armor layer and a halogen-free low-smoke flame-retardance polyolefin outer sheath which are sequentially arranged from inside to outside; the cable core comprises a plurality of wire cores, each wire core comprises an aluminum alloy conductor, each aluminum alloy conductor comprises a plurality of groups of fan-shaped divided conductors, insulating paper is wrapped outside each group of fan-shaped divided conductors, and a plurality of groups of fan-shaped divided conductors wrapped with the insulating paper are twisted to form the aluminum alloy conductors; the outside of the aluminum alloy conductor is extruded with a conductor shielding layer, an XLPE insulating layer and an insulating shielding layer from inside to outside in a three-layer co-extrusion structure, and a metal shielding layer is arranged outside the insulating shielding layer. The utility model not only improves the current carrying capacity, but also has high fire resistance and environmental protection performance.
Description
Technical Field
The utility model is suitable for power cables with rated voltage below 35KV, and belongs to the technical field of cables.
Background
The medium-voltage cable with rated voltage of 6-35KV is mainly used for electric power system transmission and distribution electric energy fixed laying lines and is used in important social public places such as densely populated electrified subways, stations, ports and wharfs, sports center squares, high-rise buildings, computer information centers, modernized large-scale markets and the like.
The existing medium voltage power cable has the following defects: 1. according to the skin effect theory, the current tends to flow to the surface in the conductor, and the closer to the center, the smaller the current is, relatively speaking, the part of the conductor is not reasonably utilized, so that the part of the aluminum material is wasted. 2. The cable core is mainly protected by wrapping a layer of flame-retardant material outside the cable core formed by a plurality of guiding devices, but when the temperature is too high, the flame-retardant material outside the cable core can fall off, so that a single wire is directly exposed to a high-temperature environment, and the cable is easy to break. 3. Has poor fire resistance and fire resistance.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art and provide the halogen-free low-smoke high-flame-retardance medium-voltage power cable with the aluminum alloy core, which not only improves the current carrying capacity, but also has high fire resistance and environmental protection performance.
The purpose of the utility model is realized in the following way: the aluminum alloy core halogen-free low-smoke high-flame-retardant medium-voltage power cable comprises a cable core, a flame-retardant tape wrapping layer, a halogen-free low-smoke flame-retardant polyolefin isolation sleeve, a ceramic silicon rubber flame-retardant layer, a galvanized steel tape armor layer and a halogen-free low-smoke flame-retardant polyolefin outer sheath which are sequentially arranged from inside to outside; the cable core comprises a plurality of wire cores, each wire core comprises an aluminum alloy conductor, each aluminum alloy conductor comprises a plurality of groups of fan-shaped divided conductors, insulating paper is wrapped outside each group of fan-shaped divided conductors, and a plurality of groups of fan-shaped divided conductors wrapped with the insulating paper are twisted to form the aluminum alloy conductors; the outside of the aluminum alloy conductor is extruded with a conductor shielding layer, an XLPE insulating layer and an insulating shielding layer from inside to outside in a three-layer co-extrusion structure, and a metal shielding layer is arranged outside the insulating shielding layer.
Preferably, the cable core further comprises a polypropylene tearing rope filling layer, and the polypropylene tearing rope filling layer is arranged at the center and the periphery of the plurality of cable cores.
Preferably, the conductive shielding layer is a crosslinked semiconductive layer.
Preferably, the insulating shielding layer is a strippable crosslinked semiconductive layer.
Preferably, the metal shielding layer adopts a copper belt or an aluminum alloy belt.
The beneficial effects of the utility model are as follows: the multiple groups of fan-shaped divided conductors inhibit the skin effect of the power cable conductors, reduce the alternating current resistance of the conductors and improve the current carrying capacity of the cable lines. The ceramic silicon rubber fire-resistant layer ensures that the cable has high fire resistance, the fire resistance is far beyond the fire resistance combustion test requirement specified by the national standard GB/T19666-2005, and the use safety of the cable under the condition of fire is ensured. The halogen-free low-smoke flame-retardant polyolefin isolation sleeve and the halogen-free low-smoke flame-retardant polyolefin outer sheath generate less smoke and do not generate harmful halogen acid substances when being burnt, so that the environmental protection performance of the cable is ensured.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Detailed Description
As shown in fig. 1, the aluminum alloy core halogen-free low-smoke high-flame-retardance medium-voltage power cable comprises three wire cores 11, each wire core 11 comprises an aluminum alloy conductor 111, each aluminum alloy conductor 111 comprises five groups of fan-shaped division conductors 1111, insulating paper 1112 is wrapped outside each group of fan-shaped division conductors 1111, and the insulating paper 1112 is corrugated insulating paper formed by compounding polyester films and polyaromatic fibers, and the thickness of the insulating paper 1112 is 0.3mm. Five sets of segmented conductors 1111 wrapped with insulating paper 1112 are stranded to form an aluminum alloy conductor 111. The exterior of the alloy conductor 111 is provided with a conductor shielding layer 112, an XLPE insulating layer 113 and an insulating shielding layer 114 which are extruded from inside to outside in a three-layer co-extrusion structure, and a metal shielding layer 115 is wrapped outside the insulating shielding layer 114. The conductor shield layer 112 is a crosslinked semiconductive layer, the insulating shield layer 114 is a peelable crosslinked semiconductive layer, and the metal shield layer 115 is a copper tape or an aluminum alloy tape.
The shielding and insulating effects of the wire core 11 are good, and the five groups of fan-shaped segmented conductors 1111 inhibit the skin effect of the power cable conductors, reduce the alternating current resistance of the conductors and improve the current carrying capacity of the cable line.
The center and the periphery positions surrounded by the three wire cores 11 are provided with the polypropylene tearing rope filling layer 12, the three wire cores 11 and the polypropylene tearing rope filling layer 12 are hinged to form the cable core 1, and the polypropylene tearing rope filling layer 12 can ensure the roundness of the cable core 1.
The cable core 1 is externally wrapped with the flame-retardant tape wrapping layer 2, the halogen-free low-smoke flame-retardant polyolefin isolating sleeve 3 is externally extruded and wrapped with the flame-retardant tape wrapping layer 2, and the ceramic silicon rubber flame-retardant layer 4 is externally arranged on the halogen-free low-smoke flame-retardant polyolefin isolating sleeve 3, so that the cable has high flame resistance. A galvanized steel tape armor layer 5 is arranged outside the ceramic silicon rubber fire-resistant layer 4, and a halogen-free low-smoke flame-retardant polyolefin outer sheath 6 is extruded outside the galvanized steel tape armor layer 5. The halogen-free low-smoke flame-retardant polyolefin isolation sleeve 3 and the halogen-free low-smoke flame-retardant polyolefin outer sheath 6 generate less smoke and do not generate harmful halogen acid substances when being burnt, so that the environmental protection performance of the cable is ensured.
Claims (5)
1. The aluminum alloy core halogen-free low-smoke high-flame-retardance medium-voltage power cable is characterized by comprising the following components: the cable comprises a cable core, a flame-retardant tape wrapping layer, a halogen-free low-smoke flame-retardant polyolefin isolation sleeve, a ceramic silicon rubber flame retardant layer, a galvanized steel tape armor layer and a halogen-free low-smoke flame-retardant polyolefin outer sheath which are sequentially arranged from inside to outside; the cable core comprises a plurality of wire cores, each wire core comprises an aluminum alloy conductor, each aluminum alloy conductor comprises a plurality of groups of fan-shaped divided conductors, insulating paper is wrapped outside each group of fan-shaped divided conductors, and a plurality of groups of fan-shaped divided conductors wrapped with the insulating paper are twisted to form the aluminum alloy conductors; the outside of the aluminum alloy conductor is extruded with a conductor shielding layer, an XLPE insulating layer and an insulating shielding layer from inside to outside in a three-layer co-extrusion structure, and a metal shielding layer is arranged outside the insulating shielding layer.
2. The aluminum alloy core halogen-free low smoke high flame retardant medium voltage power cable of claim 1, characterized in that: the cable core further comprises a polypropylene tearing rope filling layer, and the polypropylene tearing rope filling layer is arranged at the center and the periphery of the cable core.
3. The aluminum alloy core halogen-free low smoke high flame retardant medium voltage power cable of claim 1, characterized in that: the conductor shielding layer adopts a cross-linked semi-conductive layer.
4. The aluminum alloy core halogen-free low smoke high flame retardant medium voltage power cable of claim 1, characterized in that: the insulating shielding layer adopts a strippable crosslinked semiconductive layer.
5. The aluminum alloy core halogen-free low smoke high flame retardant medium voltage power cable of claim 1, characterized in that: the metal shielding layer adopts a copper belt or an aluminum alloy belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322830711.9U CN221125603U (en) | 2023-10-23 | 2023-10-23 | Aluminum alloy core halogen-free low-smoke high-flame-retardant medium-voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322830711.9U CN221125603U (en) | 2023-10-23 | 2023-10-23 | Aluminum alloy core halogen-free low-smoke high-flame-retardant medium-voltage power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221125603U true CN221125603U (en) | 2024-06-11 |
Family
ID=91341448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322830711.9U Active CN221125603U (en) | 2023-10-23 | 2023-10-23 | Aluminum alloy core halogen-free low-smoke high-flame-retardant medium-voltage power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221125603U (en) |
-
2023
- 2023-10-23 CN CN202322830711.9U patent/CN221125603U/en active Active
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