CN210722557U - Voltage 1kV bears coaxial aerial insulated cable of type - Google Patents
Voltage 1kV bears coaxial aerial insulated cable of type Download PDFInfo
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- CN210722557U CN210722557U CN201922229821.3U CN201922229821U CN210722557U CN 210722557 U CN210722557 U CN 210722557U CN 201922229821 U CN201922229821 U CN 201922229821U CN 210722557 U CN210722557 U CN 210722557U
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Abstract
The utility model discloses a voltage 1kV bears coaxial aerial insulated cable of type, including steel core carrier wire, multilayer coaxial conductor layer, multilayer coaxial insulating layer and outer jacket, multilayer coaxial insulating layer set up respectively in the steel core carrier wire and the multilayer coaxial conductor layer outside, the crowded package of outer jacket is on the coaxial insulating layer in the outside. The utility model discloses the effect of earial drainage when coaxial steel core can play cable short circuit trouble guarantees the good security performance of cable, and the conductor uses aluminium wire or aluminium alloy wire earlier, through aluminium wire drawing machine, draws into trapezoidal monofilament with trapezoidal mould, then one deck or multilayer transposition on bearing cable insulating layer, and the stranded conductor mould that adopts the nanometer coating sticiss, and the outward appearance is smooth level and smooth, has advantages such as the space is little, the circuit finished product is low, lay convenience, construction cycle weak point.
Description
Technical Field
The utility model relates to the technical field of cables, especially, relate to a voltage 1kV bears coaxial aerial insulated cable of type.
Background
An overhead insulated cable is an overhead conductor with an insulating layer, is a special cable manufactured by adopting a cross-linked insulated cable production process, and is a new power transmission mode between an overhead bare conductor and an underground extruded insulated power cable. The aerial cable is a single core, and can be divided into a duralumin wire structure, an aluminum alloy wire structure, a steel core or aluminum alloy core supporting structure, a self-supporting three-core threaded structure (the wire core can be duralumin or duralumin wire) and the like according to different structures.
No matter the low voltage power transmission is overhead or underground, the low voltage power transmission is in a three-phase four-wire or three-phase five-wire mode, an overhead power line adopts a multi-wire laying mode, the occupied space is large, the laying is complex, the investment cost is high, and the laying period is long. Is a problem which is not solved at present in the power industry.
The coaxial power cable is mature in the prior art, is used in a power transmission and distribution line of an industrial enterprise, has the same reliable advantages of power transmission quality and a split-phase cable, but the overhead cable is not replaced by a similar product at present, the bearing type coaxial overhead insulated cable developed by the inventor has safe and reliable running time records in a test line, electric equipment runs well, no bad phenomenon occurs, and the overhead insulated cable with the split-phase overhead or twisted structure is completely replaced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is exactly in order to compensate prior art's defect, in order to fill the technical blank of overhead insulated wire transmission electric power, release the power line product that has that the space is little, the circuit finished product is low, lay convenience, construction cycle is short, provide a voltage 1kV and bear type coaxial overhead insulated cable.
The utility model discloses a realize through following technical scheme:
the utility model provides a voltage 1kV bears coaxial aerial insulated cable of type, includes steel core carrier wire, multilayer coaxial conductor layer, multilayer coaxial insulating layer and outer jacket, multilayer coaxial insulating layer set up respectively in steel core carrier wire and multilayer coaxial conductor layer outside, the crowded package of outer jacket is on the coaxial insulating layer in the outside.
The coaxial insulating layer has 4 layers, and the coaxial conductor layer has three layers.
The steel core bearing wire is a tensile wire core formed by twisting a plurality of steel wires in the left direction, the number of the steel wire strands is 7, 19 and 37, and the diameter and the number of the steel wires are determined by the overhead distance of an overhead line and the weight of a cable.
The coaxial insulating layer is formed by extruding and wrapping a plurality of plastic layers on the outer sides of the steel core bearing wire and the coaxial conductor layer, and the extruding and wrapping thickness is the insulating thickness (delta t) corresponding to the conductor with the specification.
The multi-layer plastic layer is a polyvinyl chloride layer, a polyethylene layer and a cross-linked polyethylene layer.
The coaxial conductor layer is formed by concentrically twisting a multi-core conductor on a coaxial insulating layer.
The coaxial conductor layer is formed by drawing an aluminum wire or an aluminum alloy wire into a trapezoidal monofilament by using a trapezoidal die through an aluminum wire drawing machine, then stranding one or more layers on the coaxial insulating layer, and pressing by adopting a stranded wire die of a nano coating.
The utility model has the advantages that: the utility model discloses the effect of earial drainage when coaxial steel core can play cable short circuit trouble guarantees the good security performance of cable, and the conductor uses aluminium wire or aluminium alloy wire earlier, through aluminium wire drawing machine, draws into trapezoidal monofilament with trapezoidal mould, then one deck or multilayer transposition on bearing cable insulating layer, and the stranded conductor mould that adopts the nanometer coating sticiss, and the outward appearance is smooth level and smooth, has advantages such as the space is little, the circuit finished product is low, lay convenience, construction cycle weak point.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in fig. 1, a coaxial overhead insulated cable with 1kV voltage loading comprises a steel core loading wire, a coaxial conductor layer, a coaxial insulating layer and an outer sheath.
The steel core bearing rope 1 is formed by twisting a plurality of steel wires in the left direction, the steel wires are pre-pressed and deformed according to the twisting outer diameter and the strand pitch in the twisting process, and twisted steel wires are compact and round and are not loose. The steel wire structure has 7, 19 and 37 structures, and the diameter and the number of the steel wires are determined according to the overhead distance of the overhead line and the weight of the cable. The coaxial steel core can play a role in leakage current when a cable is in short circuit fault.
The inner insulating layer 2 is extruded on the plastic insulation of the bearing cable and is made of polyvinyl chloride, polyethylene and cross-linked polyethylene, and the extrusion thickness is twice of the insulation thickness (2 delta t) corresponding to the conductor with the specification.
The inner conductor 3 is firstly drawn into a trapezoidal monofilament by an aluminum wire or an aluminum alloy wire with the diameter of 9.5 through an aluminum wire drawing machine and a trapezoidal die, then one layer or a plurality of layers of trapezoidal monofilaments are stranded on the insulating layer of the bearing cable, and the trapezoidal monofilaments are compacted by adopting a stranded wire die with a nano coating, so that the outer surface is smooth and flat.
The inner conductor insulating layer 4 is made of polyvinyl chloride, polyethylene and cross-linked polyethylene, and the extrusion thickness is twice of the insulation thickness (2 delta t) corresponding to the conductor with the specification.
The middle layer conductor 5 is firstly drawn into a trapezoidal monofilament by an aluminum wire or an aluminum alloy wire with the diameter of 9.5 through an aluminum wire drawing machine and a trapezoidal die, then one layer or a plurality of layers of trapezoidal monofilaments are stranded on the insulating layer of the bearing cable, and the trapezoidal monofilaments are compacted by adopting a stranded wire die with a nano coating and have smooth and flat appearance.
The middle layer conductor insulating layer 6 is made of polyvinyl chloride, polyethylene and cross-linked polyethylene, and the extrusion thickness is twice of the insulation thickness (2 delta t) corresponding to the conductor with the specification.
The outer conductor 7 is firstly drawn into a trapezoidal monofilament by an aluminum wire or an aluminum alloy wire with the diameter of 9.5 through an aluminum wire drawing machine and a trapezoidal die, then one or more layers of trapezoidal monofilaments are stranded on the insulating layer of the bearing cable, and the trapezoidal monofilaments are compacted by a stranded wire die with a nano coating, so that the outer surface is smooth and flat.
The outer middle layer conductor insulating layer 8 is made of polyvinyl chloride, polyethylene and cross-linked polyethylene, and the extrusion thickness is the insulation thickness (delta t) corresponding to the conductor with the specification.
The outer protective layer 9 is extruded outside the outer middle layer conductor insulating layer.
Claims (7)
1. The utility model provides a voltage 1kV bears coaxial aerial insulated cable which characterized in that: the cable comprises a steel core bearing line, a plurality of layers of coaxial conductor layers, a plurality of layers of coaxial insulating layers and an outer protective layer, wherein the plurality of layers of coaxial insulating layers are respectively arranged on the outer sides of the steel core bearing line and the plurality of layers of coaxial conductor layers, and the outer protective layer is extruded on the coaxial insulating layer on the outermost side.
2. The 1kV voltage-bearing coaxial overhead insulated cable of claim 1, wherein: the coaxial insulating layer has 4 layers, and the coaxial conductor layer has three layers.
3. The 1kV voltage-bearing coaxial overhead insulated cable of claim 1, wherein: the steel core bearing wire is a tensile wire core formed by twisting a plurality of steel wires in the left direction.
4. The 1kV voltage-bearing coaxial overhead insulated cable of claim 1, wherein: the coaxial insulating layer is formed by extruding and wrapping a plurality of plastic layers on the outer sides of the steel core bearing line and the coaxial conductor layer.
5. A voltage 1kV carrying type coaxial overhead insulated cable according to claim 4, characterized in that: the multi-layer plastic layer is a polyvinyl chloride layer, a polyethylene layer and a cross-linked polyethylene layer.
6. The 1kV voltage-bearing coaxial overhead insulated cable of claim 1, wherein: the coaxial conductor layer is formed by concentrically twisting a multi-core conductor on a coaxial insulating layer.
7. The 1kV voltage-bearing coaxial overhead insulated cable of claim 6, wherein: the coaxial conductor layer is formed by drawing an aluminum wire or an aluminum alloy wire into a trapezoidal monofilament by using a trapezoidal die through an aluminum wire drawing machine, then stranding one or more layers on the coaxial insulating layer, and pressing by adopting a stranded wire die of a nano coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922229821.3U CN210722557U (en) | 2019-12-13 | 2019-12-13 | Voltage 1kV bears coaxial aerial insulated cable of type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922229821.3U CN210722557U (en) | 2019-12-13 | 2019-12-13 | Voltage 1kV bears coaxial aerial insulated cable of type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210722557U true CN210722557U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922229821.3U Active CN210722557U (en) | 2019-12-13 | 2019-12-13 | Voltage 1kV bears coaxial aerial insulated cable of type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210722557U (en) |
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2019
- 2019-12-13 CN CN201922229821.3U patent/CN210722557U/en active Active
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