CN220065221U - Tension-resistant medium-voltage power cable capable of inhibiting wire breakage - Google Patents
Tension-resistant medium-voltage power cable capable of inhibiting wire breakage Download PDFInfo
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- CN220065221U CN220065221U CN202320335181.8U CN202320335181U CN220065221U CN 220065221 U CN220065221 U CN 220065221U CN 202320335181 U CN202320335181 U CN 202320335181U CN 220065221 U CN220065221 U CN 220065221U
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- fan
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- voltage power
- power cable
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- 230000002401 inhibitory effect Effects 0.000 title description 7
- 239000004020 conductor Substances 0.000 claims abstract description 92
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910001335 Galvanized steel Inorganic materials 0.000 claims abstract description 17
- 239000008397 galvanized steel Substances 0.000 claims abstract description 17
- 239000011889 copper foil Substances 0.000 claims abstract description 15
- 210000001503 joint Anatomy 0.000 claims abstract description 10
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 238000009941 weaving Methods 0.000 claims abstract description 10
- 239000004703 cross-linked polyethylene Substances 0.000 claims abstract description 8
- 229920003020 cross-linked polyethylene Polymers 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 5
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 5
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims abstract description 5
- 229910000077 silane Inorganic materials 0.000 claims abstract description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 115
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 claims description 4
- 230000017105 transposition Effects 0.000 claims description 4
- QHSJIZLJUFMIFP-UHFFFAOYSA-N ethene;1,1,2,2-tetrafluoroethene Chemical compound C=C.FC(F)=C(F)F QHSJIZLJUFMIFP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004760 aramid Substances 0.000 claims description 2
- 229920003235 aromatic polyamide Polymers 0.000 claims description 2
- 238000005253 cladding Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims 1
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 239000011737 fluorine Substances 0.000 claims 1
- 230000001629 suppression Effects 0.000 claims 1
- 238000005452 bending Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000009954 braiding Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- FAIFRACTBXWXGY-JTTXIWGLSA-N COc1ccc2C[C@H]3N(C)CC[C@@]45[C@@H](Oc1c24)[C@@]1(OC)C=C[C@@]35C[C@@H]1[C@](C)(O)CCc1ccccc1 Chemical compound COc1ccc2C[C@H]3N(C)CC[C@@]45[C@@H](Oc1c24)[C@@]1(OC)C=C[C@@]35C[C@@H]1[C@](C)(O)CCc1ccccc1 FAIFRACTBXWXGY-JTTXIWGLSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Insulated Conductors (AREA)
Abstract
The utility model discloses a break-line-type stretch-resistant middle-low voltage power cable which comprises an inner conductor, an ethylene propylene diene monomer rubber isolation layer, an XLPE insulation layer, a shielding net-shaped conductor layer, a fluororesin tape wrapping antifriction layer, a copper foil layer, a PET resin tape longitudinal wrapping protection layer, an AFRP weaving layer and a silane grafted crosslinked high-density polyethylene outer sheath layer, wherein the inner conductor comprises galvanized steel strands, a plurality of inner layer fan-shaped conductors are twisted around the outer parts of the galvanized steel strands to form an inner conductor layer, a plurality of outer layer fan-shaped conductors are twisted around the outer parts of the inner conductor layer to form an outer conductor layer, the inner layer circumferential butt joint surfaces contacted between adjacent inner layer fan-shaped conductors and the outer layer circumferential butt joint surfaces contacted between adjacent outer layer fan-shaped conductors are arranged at intervals, and the ratio of the twisting distance of the outer layer fan-shaped conductors to the twisting distance of the inner layer fan-shaped conductors is greater than 1. The cable has better tensile property, can effectively inhibit the occurrence of the disconnection of a conductor, and has better durability.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a tension-resistant medium-voltage power cable capable of inhibiting wire breakage.
Background
A large number of power cables are applied in power construction, the cable has good insulation performance, the power supply reliability can be improved, the urban volume is beautified, and the popularization and application value is higher. However, in the cable construction process, due to the complexity and diversity of construction environments, under the condition that the cable laying conditions do not take sufficient precautions, after the cable is subjected to stretching torsion of different degrees, the phenomena of core breakage and wire breakage are easy to occur, the construction operation difficulty is increased, the durability and the usability are poor, and the potential safety hazard is buried for the normal operation of the power system.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide the cable with better tensile property for inhibiting the breakage of the conductor, which can effectively inhibit the breakage of the conductor, reduce the laying construction difficulty and has better durability.
The utility model solves the technical problems through the following technical proposal.
The utility model provides a suppress low-voltage power cable in stretch-proofing, includes the inner conductor and cladding in proper order the outside EPDM isolation layer, XLPE insulating layer, shielding netted conductor layer, fluororesin area around package antifriction layer, copper foil layer, PET resin area are indulged and are wrapped inoxidizing coating, AFRP weaving layer and silane grafting crosslinked high density polyethylene oversheath layer, the fluororesin area is wrapped the antifriction layer and is the fluororesin area clearance and is wrapped the structure, the inner conductor includes galvanized steel strand wires, and a plurality of inner layer fan-shaped conductors are around the outside transposition of galvanized steel strand wires constitutes the inner conductor layer, and a plurality of outer layer fan-shaped conductors are around the outside transposition of inner conductor layer constitutes the outer conductor layer, adjacent the inlayer circumference butt joint face that contacts between the inner layer fan-shaped conductors and the outer circumference butt joint face circumference interval arrangement that contacts between the outer fan-shaped conductors, the lay length of outer fan-shaped conductor with the inner layer fan-shaped conductor is greater than 1, inlayer fan-shaped conductor and outer fan-shaped conductor are a plurality of copper wire strands and become fan-shaped conductor structure, the outer diameter of inner conductor is 5.2mm to 38mm.
Preferably, the tinned copper wire has a diameter of 1.2mm to 3mm.
Preferably, the diameter of the tin-plated copper wire of the inner layer fan-shaped conductor is not smaller than that of the tin-plated copper wire of the outer layer fan-shaped conductor.
Preferably, the XLPE insulation layer has a thickness of 4mm to 6mm.
Preferably, the fluororesin tape is an FEP, PFA or ETFE resin layer.
Preferably, the AFRP braiding layer is formed by mutually reversely spirally winding and braiding inner and outer double-layer aramid fiber twisted yarns.
Preferably, the AFRP braid has a thickness of 0.3mm to 2mm.
Preferably, the shielding reticular conductor layer is formed by mixing and unidirectional spiral winding of tin-plated copper wires with two different wire diameters and a wire diameter ratio of 0.9 to 1, wherein the wire diameter of the tin-plated copper wires is 1.5mm to 3.2mm, and the shielding density is 92% to 95%.
Preferably, the copper foil layer is formed by electroplating on the inner surface of the longitudinally wrapped protective layer of the PET resin tape, and the thickness of the copper foil layer is 20-45 μm.
Preferably, the galvanized steel strand is formed by stranding a plurality of galvanized steel wires with the wire diameters of 1mm to 2.6 mm.
The utility model has the beneficial effects that:
1. the linear expansion coefficient of the galvanized steel wire positioned in the center of the inner conductor is smaller than that of the tinned copper wires of the inner layer fan-shaped conductor and the outer layer fan-shaped conductor, so that the cable is favorable for balancing and absorbing the extension quantity of the cable, inhibiting the extension force of the cable end, improving the laying adaptability in a complex field environment, enabling the tensile strength of the galvanized steel wire to be larger than that of the tinned copper wire, and being favorable for inhibiting the occurrence of broken wires and improving the tensile resistance and bending resistance of the cable.
2. The double-layer annular conductor structure formed by the inner-layer fan-shaped conductor and the outer-layer fan-shaped conductor is beneficial to relieving stress concentration of the inner conductor, reducing torque force during bending, enabling the ratio of the twisting distance of the outer-layer fan-shaped conductor to the twisting distance of the inner-layer fan-shaped conductor to be larger than 1, being beneficial to improving bending resistance of the inner-layer fan-shaped conductor when the cable is bent, relieving stress concentration of contact parts of the inner-layer fan-shaped conductor and the outer-layer fan-shaped conductor, enabling inner-layer circumferential abutting surfaces of adjacent inner-layer fan-shaped conductors and outer-layer circumferential abutting surfaces of adjacent outer-layer fan-shaped conductors to be in circumferential interval arrangement, being staggered, and effectively inhibiting the situation that tin-plated copper wires are broken due to the fact that the inner-layer circumferential abutting surfaces and the outer-layer circumferential abutting surfaces are in contact with each other under the stress effect.
The AFRP weaving layer has high strength and high modulus, reduces torque force during bending, is favorable for improving the overall tensile strength of the cable, enhances the cable laying adaptability, reduces the laying difficulty, adds the PET resin strip longitudinally-wrapping protective layer between the AFRP weaving layer and the copper foil layer, generates corresponding sliding friction between the protective layer and the AFRP weaving layer when the cable is subjected to bending in the laying and mounting process, and is favorable for reducing stress concentration of the copper foil layer, thereby effectively preventing the copper foil layer from generating cracks, ensuring the electrical characteristics of the cable and having better durability and usability.
4. The fluororesin tape is wrapped with the friction coefficient of the antifriction layer to be small, the gap is wrapped with the structure, so that stress concentration of the shielding reticular conductor layer is reduced, the copper foil layer is fully contacted with the shielding reticular conductor layer, stability of shielding characteristics is enhanced, and durability is better.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic cross-sectional view of an embodiment of the present utility model.
Reference numerals: the cable comprises a 1-inner conductor, a 2-ethylene propylene diene monomer rubber isolation layer, a 3-XLPE insulation layer, a 4-shielding reticular conductor layer, a 5-fluororesin tape wrapping antifriction layer, a 6-copper foil layer, a 7-PET resin tape longitudinal wrapping protection layer, an 8-AFRP weaving layer, a 9-silane grafted crosslinked high-density polyethylene outer sheath layer, a 10-galvanized steel strand, an 11-inner layer fan-shaped conductor, a 12-outer layer fan-shaped conductor, a 13-inner layer circumferential butt joint surface and a 14-outer layer circumferential butt joint surface.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the anti-break stretch-proofing low-voltage power cable of the embodiment of the utility model comprises an inner conductor 1, wherein the inner conductor 1 comprises galvanized steel strands 10, and specifically, the galvanized steel strands 10 are formed by twisting a plurality of galvanized steel wires with the wire diameters of 1mm to 2.6 mm. The inner conductor layer is formed by externally twisting a plurality of inner layer fan-shaped conductors 11 around the galvanized steel stranded wires 10, the outer conductor layer is formed by externally twisting a plurality of outer layer fan-shaped conductors 12 around the inner conductor layer, the inner layer circumferential butt joint surfaces 13 contacted between the adjacent inner layer fan-shaped conductors 11 and the outer layer circumferential butt joint surfaces 14 contacted between the adjacent outer layer fan-shaped conductors 12 are circumferentially arranged at intervals, and the ratio of the lay length of the outer layer fan-shaped conductors 12 to the lay length of the inner layer fan-shaped conductors 11 is larger than 1. The inner layer fan-shaped conductor 11 and the outer layer fan-shaped conductor 12 are formed by twisting and compressing a plurality of tinned copper wires into a fan-shaped conductor structure, specifically speaking, the diameter of each tinned copper wire is 1.2mm to 3mm, and further, the diameter of each tinned copper wire of the inner layer fan-shaped conductor 11 is not smaller than that of each tinned copper wire of the outer layer fan-shaped conductor 12. The outer diameter of the inner conductor 1 is 5.2mm to 38mm.
The outer part of the inner conductor 1 is sequentially coated with an ethylene propylene diene monomer rubber isolation layer 2, an XLPE insulation layer 3, a shielding reticular conductor layer 4, a fluororesin tape wrapping antifriction layer 5, a copper foil layer 6, a PET resin tape longitudinal wrapping protection layer 7, an AFRP woven layer 8 and a silane grafted crosslinked high-density polyethylene outer sheath layer 9, further, the inner surface of the PET resin tape longitudinal wrapping protection layer 7 is electroplated to form the copper foil layer 6, and the thickness of the copper foil layer 6 is 20-45 mu m. The XLPE insulation layer 3 has a thickness of 4mm to 6mm. The fluororesin tape-wrapped friction-reducing layer 5 is a fluororesin tape-gap-wrapped structure, and the fluororesin tape is, for example, an FEP, PFA or ETFE resin layer. In one embodiment, the shielding reticular conductor layer 4 is formed by mixing tin-plated copper wires with two different wire diameters and the wire diameter ratio between 0.9 and 1, wherein the wire diameter of the tin-plated copper wires is 1.5mm to 3.2mm, and the shielding density is 92% to 95%. In one embodiment, the AFRP braid 8 is formed by braiding inner and outer double-layer aramid twisted yarns in reverse spiral winding. The thickness of the AFRP woven layer 8 is 0.3mm to 2mm.
The foregoing is merely illustrative of the present utility model, and the scope of the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a low-voltage power cable in stretch-proofing of suppression broken string which characterized by: including inner conductor (1) and cladding in proper order be in outside EPDM isolation layer (2) of inner conductor (1), XLPE insulating layer (3), shielding netted conductor layer (4), fluororesin area around package antifriction layer (5), copper foil layer (6), PET resin area is indulged and is wrapped inoxidizing coating (7), AFRP weaving layer (8) and silane grafting crosslinked high density polyethylene oversheath layer (9), fluororesin area is wrapped antifriction layer (5) and is the fluororesin area clearance and is wrapped the structure, inner conductor (1) includes galvanized steel strand wires (10), and a plurality of inlayer fan-shaped conductors (11) are encircleed the outside transposition of galvanized steel strand wires (10) constitutes the inner conductor layer, and a plurality of outer fan-shaped conductors (12) are encircleed the outside transposition of inner conductor layer constitutes the outer conductor layer, adjacent inlayer fan-shaped conductor (11) between the contact's inlayer circumference butt joint face (13) and adjacent outer fan-shaped conductor (12) contact outer circumference butt joint face (14) circumference interval arrangement, outer fan-shaped conductor (12) with inlayer fan-shaped conductor (11) are greater than 1mm and outer fan-shaped conductor (12) are sticiss fan-shaped conductor 1.38 mm.
2. The break-resistant stretch-proof medium voltage power cable according to claim 1, wherein: the diameter of the tinned copper wire is 1.2mm to 3mm.
3. The break-resistant stretch-proof medium voltage power cable according to claim 1, wherein: the diameter of the tin-plated copper wire of the inner layer fan-shaped conductor (11) is not smaller than that of the tin-plated copper wire of the outer layer fan-shaped conductor (12).
4. The break-resistant stretch-proof medium voltage power cable according to claim 1, wherein: the XLPE insulation layer (3) has a thickness of 4mm to 6mm.
5. The break-resistant stretch-proof medium voltage power cable according to claim 1, wherein: the fluorine resin tape is an FEP, PFA or ETFE resin layer.
6. The break-resistant stretch-proof medium voltage power cable according to claim 1, wherein: the AFRP weaving layer (8) is formed by mutually and reversely spirally winding and weaving inner and outer double-layer aramid yarn.
7. The break-resistant stretch-proof medium voltage power cable according to claim 1, wherein: the thickness of the AFRP weaving layer (8) is 0.3mm to 2mm.
8. The break-resistant stretch-proof medium voltage power cable according to claim 1, wherein: the shielding reticular conductor layer (4) is formed by mixing and unidirectionally spirally winding tinned copper wires with two different wire diameters and a wire diameter ratio of 0.9-1, wherein the wire diameter of the tinned copper wires is 1.5-3.2 mm, and the shielding density is 92-95%.
9. The break-resistant stretch-proof medium voltage power cable according to claim 1, wherein: the inner surface of the PET resin belt longitudinal wrapping protective layer (7) is electroplated to form the copper foil layer (6), and the thickness of the copper foil layer (6) is 20-45 mu m.
10. The break-resistant stretch-proof medium voltage power cable according to claim 1, wherein: the galvanized steel stranded wires (10) are formed by stranding a plurality of galvanized steel wires with the wire diameters of 1mm to 2.6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320335181.8U CN220065221U (en) | 2023-02-28 | 2023-02-28 | Tension-resistant medium-voltage power cable capable of inhibiting wire breakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320335181.8U CN220065221U (en) | 2023-02-28 | 2023-02-28 | Tension-resistant medium-voltage power cable capable of inhibiting wire breakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220065221U true CN220065221U (en) | 2023-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320335181.8U Active CN220065221U (en) | 2023-02-28 | 2023-02-28 | Tension-resistant medium-voltage power cable capable of inhibiting wire breakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220065221U (en) |
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2023
- 2023-02-28 CN CN202320335181.8U patent/CN220065221U/en active Active
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