Medium-voltage aluminum alloy overhead insulated cable and preparation method thereof

An aerial insulated cable and aluminum alloy technology, which is applied in the direction of cable/conductor manufacturing, power cable, power cable with shielding layer/conductive layer, etc., can solve the problem of low strength or weather resistance of the insulation layer, low adhesion, and auxiliary materials. Waste and other problems, achieve good insulation effect and weather resistance, improve surface smoothness, and improve electrical performance

Active Publication Date: 2018-07-10
HANGZHOU CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the aluminum alloy overhead insulated wire conductors produced in China mostly use circular compacted conductors, resulting in the actual cross-section of the conductor being smaller than the cross-section of the conductor core profile, that is, the compaction coefficient of the cable is small. The shielding layer or insulating layer of the conductor is more or less embedded in the gap between the conductors, resulting in a decrease in the smoothness of the shielding interface of the conductor, which in turn affects the electrical performance of the cable and causes waste of subsequent auxiliary materials
Moreover, the extrusion production of aluminum alloy overhead insulated wires generally adopts the design of ordinary double-layer co-extrusion head and semi-extrusion head. Low adhesion, easy to slip, affecting product quality
At the same time, the strength or weather resistance of the insulating layer of the conductor is not high, which will lead to rupture during transportation or long-term use, and then damage the shielding layer, resulting in reduced insulation and shielding effects
In addition, inkjet printing is used to spray codes, and the content of the codes will be completely weathered within a few years, making it difficult to identify

Method used

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  • Medium-voltage aluminum alloy overhead insulated cable and preparation method thereof
  • Medium-voltage aluminum alloy overhead insulated cable and preparation method thereof
  • Medium-voltage aluminum alloy overhead insulated cable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like figure 1 , 2 As shown, a medium-voltage aluminum alloy aerial insulated cable includes a wire core, and the wire core includes a conductor 1, and the conductor includes a circular single-core layer 11 arranged in the center, and at least two layers arranged in sequence outside the circular single-core layer 11 Compression layer, preferably two layers, including the first compression layer 12, the second compression layer 13, each compression layer includes several twisted shaped wire conductors 14, preferably trapezoidal shaped wire conductors, the number is 6, The profiled wire conductors of two adjacent tight layers are staggered from each other, the conductors are covered with an inner shielding layer 2, and the inner shielding layer is covered with an insulating layer 3. The material of the inner shielding layer is a cross-linked conductor shielding material, and the insulating layer The material is weather-resistant overhead insulation material. Preferably, ...

Embodiment 2

[0036] The difference from Example 1 is:

[0037] A medium-voltage aluminum alloy overhead insulated cable, the crosslinked conductor shielding material is prepared from the following components: polyethylene 90kg, carbon black 30kg, graphene fiber 12.5kg, nano-scale kaolin 9kg, crosslinking agent DCP 3.5kg, Silane coupling agent A-1720.35kg, antioxidant DNP 0.3kg. The weather-resistant overhead insulating material is prepared from the following components: cross-linked polyethylene 90kg, ethylene-vinyl acetate copolymer 50kg, ABS resin 65kg, crosslinking agent PDM 0.5kg, adhesive poly alum modified epoxy resin 0.35 kg, nano kaolin 7.5kg, oil retardant 6.5kg, silane coupling agent A-172 0.35kg, dispersant 0.45kg, antioxidant DNP 0.35kg, weather resistance agent UV-9 0.35kg.

[0038] A method for preparing a medium-voltage aluminum alloy overhead insulated cable. In the step (2) drying and dehumidification: the shielding particles and insulating particles are respectively drie...

Embodiment 3

[0040] The difference from Example 1 is:

[0041] A medium-voltage aluminum alloy overhead insulated cable, the crosslinked conductor shielding material is prepared from the following components: polyethylene 100kg, carbon black 40kg, graphene fiber 15kg, nano-scale kaolin 10kg, crosslinking agent DCP 5kg, silane coupling Agent A-1720.5kg, antioxidant DNP 0.4kg. The weather-resistant overhead insulating material is prepared from the following components: cross-linked polyethylene 100kg, ethylene-vinyl acetate copolymer 60kg, ABS resin 75kg, crosslinking agent PDM 0.6kg, adhesive poly alum modified epoxy resin 0.5 kg, nano kaolin 9kg, oil retardant 8kg, silane coupling agent A-172 0.5kg, dispersant 0.6kg, antioxidant DNP 0.5kg, weather resistance agent UV-9 0.5kg.

[0042] A method for preparing a medium-voltage aluminum alloy overhead insulated cable. In step (2) drying and dehumidification: the shielding particles and insulating particles are respectively dried and dehumidif...

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Abstract

The invention relates to the technical field of cables, and specifically discloses a medium-voltage aluminum alloy overhead insulated cable and a preparation method thereof. The medium-voltage aluminum alloy overhead insulated cable comprises a cable core, wherein the cable core comprises a conductor, an inner shielding layer coating the conductor and an insulating layer coating the inner shielding layer, the conductor comprises a circular single core layer arranged at the center and at least two compressing layers sequentially arranged outside the circular single core layer, each compressinglayer comprises a plurality of stranded molded wire conductors, and the molded wire conductors of the adjacent two compressing layers are arranged in a mutually staggered manner, so that the performance stability of the cable is effectively improved. The medium-voltage aluminum alloy overhead insulated cable is extruded and molded by adopting a three-layer co-extrusion mode, a connecting piece ofan extruding machine and a machine head is adjusted so as to enable a second extrusion channel to be of a micro cone structure with a feeding port being small, a discharging port being large and an inclination angle of the inner wall being 8 degrees, and the adhesion between the conductor and the inner shielding layer is improved to 260N. Meanwhile, the monitoring of online monitoring equipment improves accurate control for the size of the cable, and the laser printing identifier can better improve the recognition clarity and the abrasion resistance.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a medium-voltage aluminum alloy overhead insulated cable and a preparation method thereof. Background technique [0002] At present, the aluminum alloy overhead insulated wire conductors produced in China mostly use circular compacted conductors, resulting in the actual cross-section of the conductor being smaller than the cross-section of the conductor core profile, that is, the compaction coefficient of the cable is small. The shielding layer or insulating layer of the conductor is more or less embedded in the gap between the conductors, resulting in a decrease in the smoothness of the shielding interface of the conductor, which in turn affects the electrical performance of the cable and causes waste of subsequent auxiliary materials. Moreover, the extrusion production of aluminum alloy overhead insulated wires generally adopts the design of ordinary double-layer co-extrusion he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/02H01B13/00
CPCH01B9/021H01B13/00
Inventor 孙永哲倪穗金国源
Owner HANGZHOU CABLE
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