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Water-blocking medium-voltage power cable employing aluminum-scandium alloy conductors

A scandium-aluminum alloy and power cable technology, which is applied in the direction of metal/alloy conductors, power cables with shielding layers/conductive layers, conductors, etc., to achieve cost reduction, cost reduction, and good flame-retardant and waterproof effects

Active Publication Date: 2016-06-29
ANHUI LINGYU CABLE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is no 6-35kV power cable with low price and excellent performance and water resistance so far.

Method used

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  • Water-blocking medium-voltage power cable employing aluminum-scandium alloy conductors

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Effect test

Embodiment 1

[0023] A scandium-aluminum alloy conductor water-blocking high-voltage power cable, the core of the cable is composed of three power cores; the power cores are sequentially provided with a power core conductor shielding layer 2, a power core insulation layer 3 and a power core conductor 1. Power core metal shielding layer 4; three power cores are provided with water-blocking tape wrapping layer 6, aluminum-plastic tape longitudinal cladding layer 7, galvanized steel tape armor layer 8 and PVC outer sheath 9; three power cores Water-blocking filling strips 5 are filled between the wire core and the wrapping layer of the water-blocking tape.

Embodiment 2

[0025] The production method of scandium aluminum alloy conductor is as follows:

[0026] Put the aluminum ingot into the shaft furnace, melt it at 750-770 ℃, flow into the holding furnace, add iron, cerium-rich rare earth and scandium for smelting; after stirring evenly, refine, purify, degas and slag the melt. The alloy melt not lower than 750°C is sent to the aluminum rod continuous casting and rolling unit for casting and rolling, wherein the temperature of the casting billet is 650°C, and the aluminum alloy rod with high scandium content of 300°C and Φ10mm is obtained; The aluminum alloy rod is placed in a heat treatment furnace at 280-290°C for 3-5 hours to relieve stress and cooled naturally; then it is drawn on an aluminum alloy wire drawing machine, and the lubrication temperature is controlled to be ≤100°C. -05 (2011) 8000 series aluminum alloy wires for electrical annealing and tempering at medium temperature, standard aluminum alloy single wire with high scandium c...

Embodiment 3

[0028] The polyethylene insulating layer consists of the following raw materials in parts by weight:

[0029] 90 parts of polyethylene, 12 parts of polybutylene, 14 parts of styrene-acrylonitrile copolymer, 8 parts of polychlorotrifluoroethylene-vinylidene fluoride copolymer, 15 parts of triallyl isocyanurate, ethylene 5 parts of bis-stearamide, 10 parts of methyl acetoacetate, 9 parts of trimethylpentanediol, 4 parts of trimethylhydroxypentyl isobutyrate, 7 parts of calcium phosphorylcholine chloride, zirconium dioxide 4 parts, 4 parts of barium hydroxide octahydrate, 5 parts of carbon black, 2 parts of iron stearate

[0030] The raw materials were mixed evenly, added into a twin-screw extruder for mixing and granulation, and the temperature was controlled at 150° C. to obtain a finished product.

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Abstract

The invention discloses a water-blocking medium-voltage power cable employing aluminum-scandium alloy conductors. A wire core of the cable comprises three power wire cores, wherein each power wire core is formed by sequentially arranging a power wire core conductor shielding layer, a power wire core insulating layer and a power wire core metal shielding layer outside a power wire core conductor; a water-blocking tape lapping layer, an aluminum-plastic tape longitudinal wrapping layer, a galvanized steel strip armor layer and a polyvinyl chloride sheath are sequentially arranged outside the three power wire cores; and the space between the three power wire cores and the water-blocking tape lapping layer is filled with a water-blocking filling strip. The aluminum-scandium alloy conductors are adopted as the power wire core conductors, so that, on one hand, a plurality of disadvantages when pure aluminum is adopted as the wire and cable conductors are avoided, and the water-blocking medium-voltage power cable has the advantages of creep resistance, high flexibility, high ductility, low resilience, connection stability, good water-blocking property and the like; and on the other hand, the cost of the cable is also reduced by 50%.

Description

technical field [0001] The invention relates to a scandium-aluminum alloy conductor water-blocking high-voltage power cable, which belongs to the field of electric wires and cables. Background technique [0002] With the continuous development of my country's industry, my country has entered the era of electrification in an all-round way, and the use of power cables is also increasing. The main component of the conductor for manufacturing cables is copper, accounting for about 70% of the total amount of copper used. However, my country's copper resources are very short. With the depletion of China's copper mine resources, 80% of China's copper mines need to be imported, which is highly dependent. With the rising price of copper, replacing copper with aluminum is an inevitable trend in the development of wire and cable. More than 80% of the wires and cables in France are aluminum conductors, and the aluminum conductors in Japan also account for more than 50%. my country's a...

Claims

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Application Information

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IPC IPC(8): H01B9/02H01B7/02H01B7/282H01B7/288H01B7/295H01B1/02H01B13/00C22C21/00C22F1/04C08L23/06C08L23/20C08L25/12C08L27/12C08K13/02C08K3/22C08K3/04C08K5/098
CPCC08L23/06C08L2201/02C08L2203/202C08L2205/035C22C21/00C22F1/04H01B1/023H01B7/02H01B7/282H01B7/2825H01B7/288H01B7/295H01B9/02H01B13/00C08L23/20C08L25/12C08L27/12C08K13/02C08K2003/2244C08K2003/2206C08K3/04C08K5/098
Inventor 李万松
Owner ANHUI LINGYU CABLE TECH
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