CN203433883U

CN203433883U - Low-voltage fireproof scandium aluminum alloy conductor power cable

Info

Publication number: CN203433883U
Application number: CN201320573845.0U
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

The utility model discloses a low-voltage fireproof scandium aluminum alloy conductor power cable. A cable core is formed by intertwisting power wire cores and a ground wire core. A fireproof magnesium oxide filling layer is arranged among the gaps of the cable core. The cable core and the magnesium oxide filling layer are wrapped by a glass fiber tape wrapping layer. An oxygen isolation layer is extruded outside the glass fiber tape wrapping layer. A galvanized steel strip layer is arranged outside the oxygen isolation layer. A polyvinyl chloride outer sheath is arranged on the outermost layer of the cable. Each power wire core is composed of a power wire core conductor and a power wire core insulating layer extruded outside the power wire core conductor. A scandium aluminum alloy conductor serves as the power wire core conductor. A crosslinked polyethylene insulating layer serves as the power wire core insulating layer. The cable has the advantages of creep resistance, high flexibility, strong extension, low rebounding, stable connection and the like; on the other hand, the cost of the cable is lowered by 50%; and by adopting the cable, the rescue time is enough, the cable is protected from being burned out, and the escape time is longer in a fire.

Description

A kind of scandium-aluminum alloy conductor low pressure fireproof power cable

Technical field:

The utility model relates to a kind of scandium-aluminum alloy conductor low pressure fireproof power cable, is specifically related to aluminium alloy conductor rated voltage 0.6/1kV 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 power cable, cable has enough rescue time cables can not be burned when running into fire, has more escape time.

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 low pressure fireproof power cable, power line core conductor adopts 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.Conductor adopts fire-resistant isinglass belt isolation, insulation to adopt polyvinyl chloride or polythene material, fillings of fire-resistant magnesium oxide material, wrapped glass fibre belt outward, extrudes oxygen barrier layer, steel-tape armouring (armouring), oversheath employing flame-proof polyvinyl chloride material, cable has enough rescue time cables can not be burned when running into fire, has more escape time.

The utility model technical solution problem adopts following technical scheme:

A kind of scandium-aluminum alloy conductor low pressure fireproof power cable, adopt power core and ground core twisted synthesizing cable core, cable core gap is provided with fire-resistant magnesium oxide packed layer, described cable core and magnesium oxide packed layer are provided with glass fibre belt lapping layer outward, at described glass fibre belt lapping layer, be extruded with oxygen barrier layer outward, described oxygen barrier layer is provided with galvanized steel strip layer outward, the outermost layer of cable is provided with polyvinyl chloride oversheath, described power core consists of with extruding in the outer field power line core insulation of described power line core conductor layer power line core conductor, described power line core conductor adopts scandium-aluminum alloy conductor, described power line core insulation layer adopts crosslinked polyetylene insulated layer.

Described ground core consists of with extruding in the outer field ground wire core insulation of described ground wire core conductor layer ground wire core conductor.

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 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 power line core conductor adopts high scandium content aluminium alloy conductor, conductor adopts fire-resistant isinglass belt isolation outward, insulation adopts polyvinyl chloride or polythene material, adopt three power cores (or three power cores add a ground core or three power cores add a ground core and add a neutral line) fire-resistant magnesium oxide material of stranded rear use to fill and form cable core, wrapped glass fibre belt, extrude oxygen barrier layer, galvanized steel strip armouring (armouring), with flame-proof polyvinyl chloride material, extrude oversheath, cable is when running into fire, the oxygen of oxygen barrier layer blocking-up cable inside has also just stoped burning, the fusing point of magnesium oxide material is 2800 ℃, cable is met fire constantly, structure there will not be problem.There are enough rescue time cables can not be burned, have more escape time to reduce casualties.

3, the utility model is mainly used in the connection of low-voltage circuit and similar devices, the cost of cable 50%, the electric conductivity of cable is greatly improved, and when cable runs into fire, can not be burned.

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 insulation layers, 3 ground wire core conductors, 4 ground wire core insulation layers, 5 magnesium oxide packed layers, 6 glass fibre belt lapping layers, 7 oxygen barrier layers, 8 galvanized steel belts, 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. 2, the scandium-aluminum alloy conductor low pressure fireproof power cable of the present embodiment, adopt power core and ground core twisted synthesizing cable core, cable core gap is provided with fire-resistant magnesium oxide packed layer 5, cable core and magnesium oxide packed layer are provided with glass fibre belt lapping layer 6 outward, at glass fibre belt lapping layer, be extruded with oxygen barrier layer 7 outward, oxygen barrier layer is provided with galvanized steel strip layer 8 outward, the outermost layer of cable is provided with polyvinyl chloride oversheath 9, wherein power core consists of with extruding in the outer field power line core insulation of power line core conductor layer 2 power line core conductor 1, power line core conductor 1 adopts scandium-aluminum alloy conductor, power line core insulation layer 2 adopts crosslinked polyetylene insulated layer.Cable shown in Fig. 1 does not arrange oxygen barrier layer 7 and galvanized steel belt 8.Ground core consists of with extruding in the outer field ground wire core insulation of ground wire core conductor layer 4 ground wire core conductor 3.

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.Conductor adopts fire-resistant isinglass belt isolation, insulation to adopt polyvinyl chloride or polythene material, three power cores of employing (or three power cores add a ground core or three power cores add a ground core and add a neutral line) fire-resistant magnesium oxide material of stranded rear use to fill outward to form cable core, wrapped glass fibre belt, extrudes oxygen barrier layer, galvanized steel strip armouring (armouring), with flame-proof polyvinyl chloride material, extrudes oversheath, cable has enough rescue time cables can not be burned when running into fire, has more escape time.

Claims

1. a scandium-aluminum alloy conductor low pressure fireproof power cable, adopt power core and ground core twisted synthesizing cable core, cable core gap is provided with fire-resistant magnesium oxide packed layer (5), described cable core and magnesium oxide packed layer are provided with glass fibre belt lapping layer (6) outward, at described glass fibre belt lapping layer, be extruded with oxygen barrier layer (7) outward, described oxygen barrier layer is provided with galvanized steel strip layer (8) outward, the outermost layer of cable is provided with polyvinyl chloride oversheath (9), it is characterized in that, described power core is by power line core conductor (1) and extrude in described power line core conductor outer field power line core insulation layer (2) and 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 low pressure fireproof power cable according to claim 1, is characterized in that, described ground core is by ground wire core conductor (3) and extrude in described ground wire core conductor outer field ground wire core insulation layer (4) and form.