CN201556433U - High-strength flexible aluminum alloy wire armored cable - Google Patents

Abstract

High-strength flexible aluminum alloy wire armored cable is characterized in that the conductor is composed of a single annealed copper wire or multiple annealed copper wires twisted, and the insulating layer is extruded on the conductor to form an insulated core. The core constitutes the cable core or the cable core is composed of multiple insulated wire cores twisted into a cable. The outer layer of the cable core is sequentially provided with an extruded inner lining layer and an armor composed of high-strength flexible aluminum alloy wires. layer, overlapped and covered to form a non-woven fabric layer, and extruded to form an outer sheath layer; the armor layer is made of Al-Mg-Si alloy wire for electrical purposes. The utility model improves the tensile performance of the cable, reduces the weight of the cable itself, has excellent electrical performance, avoids the generation of eddy currents, resists electromagnetic interference, can increase the safety and reliability of the power supply system, and improves the quality of power transmission.

Description

High-strength flexible aluminum alloy wire armored cable

technical field

The utility model relates to a cable for power transmission and distribution, in particular to a high-strength flexible aluminum alloy wire armored cable, which belongs to the technical field of electric wires and cables.

Background technique

During the laying and operation of power cables, they need to bear a certain length of self-weight or resist radial pressure, and are generally armored with steel wires. But steel wire armor also has some problems.

If a single-core cable is armored with ferromagnetic materials, eddy current heating will be generated and the cable will break down. Earlier, the domestic counterparts used the steel wire armor to embed a few copper wires in the middle for magnetic isolation, but its effect It is very poor, and the test proves that the magnetic isolation effect is not obtained. Therefore, at present, most of them use stainless steel wire, aluminum alloy wire or pure aluminum wire armoring method.

In multi-core cables, although steel wire armor can be used, it increases the weight of the cable and brings great inconvenience to installation, laying and transportation.

Chinese patent 200610024363.4 uses pure aluminum wire as the armor layer. Due to the low mechanical strength of pure aluminum wire, it is subject to certain restrictions in the application process.

Chinese patent 03235978.0 is an aluminum alloy wire armored cable, which is limited to medium-voltage single-core cables, and does not involve medium-voltage multi-core cables and low-voltage cables. In particular, the processing characteristics of alloy wire are not considered: flexibility.

If stainless steel wire armor is used, the cost will be greatly increased; and the use of pure aluminum wire armor will reduce the cost, but due to the natural softness of the pure aluminum wire material, poor tensile strength and fast creep, it is not conducive to being used for armor. Pack.

The above-mentioned problems can be avoided by adopting high-strength flexible aluminum alloy wire. However, the tensile strength and economic indicators of aluminum alloy wire are different with different components, which affects the market application of cables. Therefore, it is particularly necessary to use materials with reasonable technical and economic indicators.

Utility model content

In order to overcome the defects of the prior art, the purpose of this utility model is to provide a high-strength flexible aluminum alloy wire armored cable, which not only has tensile properties, light weight, but also has excellent electrical properties, and can avoid eddy currents. At the same time, it has anti-electromagnetic interference performance, increases the safety and reliability of the power supply system, and improves the quality of power transmission.

The utility model solves the technical problem and adopts the following technical solutions:

The structural feature of the high-strength flexible aluminum alloy wire armored cable of the utility model is that the conductor is composed of a single annealed copper wire or a plurality of annealed copper wires twisted together, and an insulating layer is extruded on the conductor to form an insulated wire core. One insulated wire core constitutes the cable core or a cable core is formed by twisting multiple insulated wire cores into a cable. The outer layer of the cable core is sequentially provided with an extruded inner lining layer and a high-strength flexible aluminum alloy wire. The armored layer, overlapped and covered to form a non-woven fabric layer, and extruded to form an outer sheath layer; the armored layer is an Al-Mg-Si alloy wire for electrical use.

The insulating layer is made of PVC insulating material, XLPE material, ethylene propylene rubber material or radiation cross-linked polyolefin material.

The sheath layer is made of PVC sheath material, low-smoke halogen-free polyolefin or thermoplastic elastomer sheath material.

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

1. The armor layer in this utility model adopts Al-Mg-Si alloy wire, which improves the defect of low mechanical strength of pure aluminum wire, greatly improves its tensile strength, and maintains the non-magnetic and excellent properties of aluminum wire. Electrical conductivity, in line with the technical requirements of armored wire;

2. The insulation layer of the utility model adopts PVC insulation material, or XLPE material, ethylene-propylene rubber material, and irradiation cross-linked polyolefin material, which are the most commonly used materials for cables at present, and do not affect the cable cost and processing difficulty;

3. The inner and outer sheaths of the utility model are made of PVC sheath material, or low-smoke, halogen-free polyolefin; thermoplastic elastomer sheath material and other materials extruded. The material has high mechanical properties and is easy to obtain, and is also commonly used for cables. Material, reduce cable manufacturing cost.

Description of drawings

Fig. 1 is a structural schematic diagram of a three-core cable of the present invention.

Labels in the figure: 1 conductor; 2 insulation layer; 3 inner lining layer; 4 armor layer; 5 non-woven fabric layer; 6 outer sheath layer.

Below in conjunction with the accompanying drawings, the utility model will be further described through specific embodiments.

Detailed ways

Referring to Figure 1, the conductor 1 is composed of a single annealed copper wire or a plurality of annealed copper wires twisted together, the insulating layer 2 formed on the conductor forms an insulated wire core, and the single insulated wire core constitutes a cable core or consists of a single insulated wire core. A plurality of insulated wire cores are twisted into a cable to form a cable core, and the outer layer of the cable core is sequentially provided with an extruded inner lining layer 3, an armor layer composed of sparsely wound high-strength flexible aluminum alloy wires 4, and an overlapping cover wrapping layer. A non-woven fabric layer 5, and an outer sheath layer 6 formed by extrusion.

In the specific implementation process, the insulation layer 2 is made of PVC insulation material, XLPE material, ethylene-propylene rubber material or radiation cross-linked polyolefin material; the armor layer 4 is an Al-Mg-Si alloy wire for electrical use; the sheath layer 6 is It is extruded from PVC sheath material, low-smoke halogen-free polyolefin material or thermoplastic elastomer sheath material.

Claims (3)

1. high strength flexible aluminum-alloy wire armoured cable, it is characterized in that conductor (1) is made of single soft copper silk or many soft copper skein silks close and form, go up extruded insulation layer (2) at conductor (1) and constitute insulated wire cores, constitute cable core or constitute cable core by single insulated wire cores by the stranded stranding of many eradications edge core, set gradually inner covering (3) that the type that extrudes becomes from inside to outside at the cable core skin, dredge the armour (4) that constitutes around the high strength flexible aluminum-alloy wire, overlappingly put up wrapped formation nonwoven layer (5), and extrude and form external sheath layer (6); Described armour (4) adopts the electrician with containing Al-Mg-Si alloy silk.

2. high strength flexible aluminum-alloy wire armoured cable according to claim 1 is characterized in that described insulating barrier (2) adopts PVC insulating material, XLPE material, ethylene-propylene rubber material or cross-linking radiation polyolefine material.

3. high strength flexible aluminum-alloy wire armoured cable according to claim 1 is characterized in that described restrictive coating (6) adopts PVC protective cover material, low-smoke halogen-free polyolefin or thermoplastic elastomer sheath material.

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