CN203433879U

CN203433879U - Scandium-contained aluminium alloy conductor-based medium-voltage power cable

Info

Publication number: CN203433879U
Application number: CN201320570146.0U
Authority: CN
Inventors: 李万松
Original assignee: Anhui Lingyu Cable Technology Co Ltd
Current assignee: Anhui Lingyu Cable Technology Co Ltd
Priority date: 2013-09-13
Filing date: 2013-09-13
Publication date: 2014-02-12
Anticipated expiration: 2023-09-13

Abstract

Disclosed in the utility model is a scandium-contained aluminium alloy conductor-based medium-voltage power cable. Three power cores are twisted into a cable core; a filling layer is arranged in the gap of the cable core; a polyester tape wrapping layer is arranged outside the cable core and the filling layer; and a polyvinyl chloride outer sheath is arranged at the outermost layer of the cable. The power cores are formed by power core conductors, power core conductor shielding layers, power core insulation layers and power core insulation shielding layers successively from inside to outside; the power core conductors employ scandium-contained aluminium alloy conductors; and the power core insulation layers employ crosslinked polyethylene insulation layers. Because the aluminium alloy conductors with the high scandium content are used as the power core conductors, on the one hand, some defects caused by utilization of pure aluminium for the cable conductors can be overcome and the advantages of creep deformation resistance, high flexibility, strong extension, low rebounding and stable connection and the like are realized; and on the other hand, the cable cost can be reduced by 50%.

Description

A kind of scandium-aluminum alloy conductor medium-pressure power cable

Technical field:

The utility model relates to a kind of scandium-aluminum alloy conductor medium-pressure power cable, is specifically related to aluminium alloy conductor rated voltage 6-35kV power cable, belongs to technical field of electric wires and cables.

Background technology:

Along with the development of China's industry, China enters Electrification Age comprehensively at present, and power cable use amount is also increasing, and the conductor main component of manufacturing cable is copper, accounts for approximately 70% of total copper consumption.But China's copper resource is very short, along with the exhaustion of COPPER IN CHINA resource, COPPER IN CHINA 80% needs import, and dependence is large.Along with constantly riseing of copper valency, it with aluminium substitution copper, is the inexorable trend of electric wire development.The electric wire of France more than 80% is aluminium conductor, and the aluminum conductor of Japan also accounts for more than 50%.China's bauxite resource is very abundant, but application quantity is less than 1%, main or because due to aluminum conductor manufacturing technology immature, therefore obtaining technical breakthrough is the key addressing this problem.

Past fine aluminium exists a lot of not enough as electric wire and cable conductor, be rarely used in insulated wire cores, for being drawn into thinner wire rod, is used as wiring, electromagnetic wire and telecommunication cable, especially difficulty.Because the mechanical performances such as the intensity of aluminium and elongation can not meet requirement, so domestic aluminium conductor is all as aerial condutor substantially, be rarely used in and prepare cable insulation core, also there is no up to now a kind ofly there is excellent electric conductivity, cheap electric conducting material as the conductor of 6-35kV power cable.Summary of the invention:

For overcoming the defect of prior art, the purpose of this utility model is to provide a kind of scandium-aluminum alloy conductor medium-pressure power cable, power line core conductor adopts high scandium content aluminium alloy conductor, having solved on the one hand fine aluminium in the past exists a lot of not enough as electric wire and cable conductor, there is the advantages such as creep resistant, high pliable and tough, strong extension, low bounce-back, stable connection, also reduced on the other hand the cost 50% of cable.

The utility model technical solution problem adopts following technical scheme:

A kind of scandium-aluminum alloy conductor medium-pressure power cable, adopt three stranded formation cable cores of power core, cable core gap is provided with packed layer, at described cable core and packed layer, be provided with polyester belt lapping layer outward, the outermost layer of cable is provided with polyvinyl chloride oversheath, described power core from-inner-to-outer consists of power line core conductor, power line core conductor screen, power line core insulation layer and power line core insulation screen successively, described power line core conductor adopts scandium-aluminum alloy conductor, and described power line core insulation layer adopts crosslinked polyetylene insulated layer.

Between described polyester belt lapping layer and described oversheath, be also provided with successively inner sheath and steel-tape armouring layer.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

1, the utility model cable, power line core conductor adopts novel high scandium content aluminium alloy conductor, its intensity 211MPa after tested, conductance 62.0%IACS, elongation 31.8%, yield strength 110MPa.Solve on the one hand past fine aluminium a lot of not enough as electric wire and cable conductor existence, there is the advantages such as creep resistant, pliable and tough, the strong extension of height, low bounce-back, stable connection, also reduced on the other hand the cost 50% of cable.

2, the utility model adopts crosslinked polyethylene as conductor insulation, the external sheath layer that polyvinyl chloride is outer protection.

3, the utility model is mainly used in the delivery of electrical energy of medium-voltage line and similar circuit, the cost of cable 50%, the electric conductivity of cable is greatly improved.

Accompanying drawing explanation:

Fig. 1,2 is the structural representation of the utility model cable.

Number in the figure: 1 power line core conductor, 2 power line core conductor screens, 3 power line core insulation layers, 4 power line core insulation screens, 5 packed layers, 6 polyester belt lapping layers, 7 inner sheaths, 8 steel-tape armouring layers, 9 oversheaths.

Below pass through embodiment, and the utility model is described in further detail by reference to the accompanying drawings.

Embodiment:

Embodiment: referring to Fig. 1, the scandium-aluminum alloy conductor medium-pressure power cable of the present embodiment, adopt three stranded formation cable cores of power core, cable core gap is provided with packed layer 5, at cable core and packed layer, be provided with polyester belt lapping layer 6 outward, the outermost layer of cable is provided with polyvinyl chloride oversheath 9, wherein power core from-inner-to-outer consists of power line core conductor 1, power line core conductor screen 2, power line core insulation layer 3 and power line core insulation screen 4 successively, power line core conductor 1 adopts scandium-aluminum alloy conductor, and power line core insulation layer 3 adopts crosslinked polyetylene insulated layer.Referring to Fig. 2, between polyester belt lapping layer 6 and oversheath 9, be also provided with successively inner sheath 7 and steel-tape armouring layer 8.

In concrete enforcement, the preparation method of high scandium content aluminium alloy conductor is; Conductor composition is configured to by mass percentage: scandium 0.4-0.8wt%, and iron 0.01-0.1wt%, cerium-rich rare earth 0.01-0.1wt%, surplus is aluminium; Specifically aluminium ingot is added in shaft furnace, at 750-770 ℃, flow into holding furnace after dissolving, add iron, cerium-rich rare earth and scandium to carry out melting, after stirring to melt refining, purification, degasification, the processing of skimming, the alloy melt that is not less than 750 ℃ after refining is sent into aluminium bar continuous casting and tandem rolling unit and carry out strand and rolling, wherein strand temperature is 650 ℃, obtain 300 ℃, the high scandium content aluminium alloy rod of Φ 10mm, high scandium content aluminium alloy rod is placed in heat-treatment furnace in 280-290 ℃ of insulation 3-5 hour with destressing, naturally cooling; Wire drawing on aluminum alloy drawing machine subsequently, control lubricated temperature≤100 ℃, through excessive draw and in draw, obtain meeting ASTM B800-05(2011) electric with annealing and the high scandium content of average tempering 8000 series alloys wire standard aluminium alloy single line, naturally cooling in the 320-340 ℃ of Ageing Treatment through 6-8 hour again, through the stranded high scandium content aluminium alloy conductor that obtains meeting the high-strength high-conductivity of GB/T3956-2008 standard, in stranded process, can not damage the surface of aluminium alloy single line.Its tensile strength 211MPa after tested, elongation 31.8%, yield limit is 100～116MPa, conductance 62.0%IACS.High scandium content aluminium alloy conductor is outer forms power core by conductor shield, insulating barrier, insulation screen, three stranded formation cable cores of power core, described cable core is provided with successively polyester belt lapping layer, inner sheath (armouring), steel-tape armouring layer (armouring) and oversheath outward and forms.

Claims

1. a scandium-aluminum alloy conductor medium-pressure power cable, adopt three stranded formation cable cores of power core, cable core gap is provided with packed layer (5), at described cable core and packed layer, be provided with polyester belt lapping layer (6) outward, the outermost layer of cable is provided with polyvinyl chloride oversheath (9), it is characterized in that, described power core from-inner-to-outer is successively by power line core conductor (1), power line core conductor screen (2), power line core insulation layer (3) and power line core insulation screen (4) form, described power line core conductor (1) adopts scandium-aluminum alloy conductor, described power line core insulation layer (2) adopts crosslinked polyetylene insulated layer.

2. a kind of scandium-aluminum alloy conductor medium-pressure power cable according to claim 1, is characterized in that, is also provided with successively inner sheath (7) and steel-tape armouring layer (8) between described polyester belt lapping layer (6) and described oversheath (9).