CN202076039U - Low voltage single core aluminium alloy power cable - Google Patents

Abstract

The utility model relates to a low-voltage single-core aluminum alloy power cable, which is composed of a rare-earth aluminum alloy conductor and a cross-linked polyethylene insulating layer. The aluminum alloy conductor is mainly composed of aluminum, iron and rare earth elements, and the insulating material is cross-linked polyethylene material. The cross-linking method can be silane cross-linking, chemical cross-linking or radiation cross-linking. The cable has simple structure and excellent performance.

Description

A low-voltage single-core aluminum alloy power cable

technical field

The utility model provides a low-voltage single-core aluminum alloy power cable, which belongs to the technical field of electric wires and cables. the

Background technique

Domestic low-voltage power cables are basically copper cores, and the traditional structure of single-core cables is: copper core conductor, PVC insulation, wrapping tape, and PVC sheath from inside to outside. Although copper has excellent characteristics as a cable conductor, the cost of using copper cables is too high. Polyvinyl chloride has a long history of being used as insulating material and sheath. Because PVC contains chlorine and has flame retardant properties, it is a common choice for cable insulation and sheathing, but PVC sheathing It also has defects. The first is that it contains halogens, which are harmful to the human body and the environment. Especially when it is on fire, it is a material that is not environmentally friendly and does not meet environmental protection requirements; the second is due to the characteristics of the molecular structure of polyvinyl chloride. , Its aging resistance is not very good, so the service life of PVC cables is generally not very long, and it is generally designed according to 30 years. Although the sheath material on the outside of the cable has a certain protective effect on the cable, because it uses polyvinyl chloride material, its service life is also very limited, and its effect is also very limited. the

Contents of the invention

The utility model provides a low-voltage single-core aluminum alloy power cable, which can save costs and has a longer service life. the

The utility model adopts the following technical solutions: a low-voltage single-core aluminum alloy power cable, which is composed of a rare-earth aluminum alloy conductor and a cross-linked polyethylene insulating layer. the

A mica tape layer is also arranged between the rare earth aluminum alloy conductor and the cross-linked polyethylene insulating layer. the

The rare earth aluminum alloy conductor is any one of a solid conductor, a compressed stranded conductor, and a tightly compressed stranded conductor. the

The material of the rare earth aluminum alloy conductor is mainly composed of elements such as aluminum, iron and rare earth. The conductor material also contains trace elements such as magnesium, copper, zinc, silicon, calcium, vanadium, titanium, chromium, and manganese. The aluminum alloy conductor core made of this material has a conductor conductivity ≥ 61% IACS, tensile strength ≥ 90Mpa, elongation at break ≥ 10%, and the minimum bending radius of the cable is 7 times the outer diameter of the cable. the

The material of the cross-linked polyethylene insulating layer is cross-linked polyethylene, and the cross-linking method of polyethylene can be silane cross-linking, chemical cross-linking or radiation cross-linking. The polyethylene insulating layer cross-linked by the above method has more excellent mechanical and physical properties and electrical properties, and has better aging resistance, and the service life can reach 40 years, which is far superior to polyvinyl chloride materials. Due to the excellent weather resistance and environmental corrosion resistance of the XLPE insulation layer, the service life is also significantly better than that of PVC, so the cable structure design is simpler, and there is no need for wrapping tape and PVC sheath layer , thus saving the processing and material costs of wrapping tape and sheath. the

Compared with copper, the cross-sectional area of aluminum alloy cable increases by 1.5 times, which can reach the conductivity standard of copper, and can achieve the same use effect as copper cable, and the cost of copper conductor accounts for about 70% of the total cost of copper cable, so aluminum alloy conductor is used Wire core can save a lot of cost. the

In order to make the cable have a flame-retardant effect, a flame retardant can be added to the cross-linked polyethylene material to improve the flame-retardant performance of the cable, making the aluminum alloy power cable more excellent in performance and more widely used. In order to increase the fire resistance of the cable, a layer of mica tape can be wrapped between the conductor core and the insulating layer. the

Beneficial effect:

The low-voltage single-core aluminum alloy power cable provided by the utility model adopts cross-linked polyethylene as the insulating layer, which has better mechanical and physical properties and electrical properties than the original polyvinyl chloride material, and has better aging resistance. , the service life can reach 40 years. the

Moreover, due to the existence of the cross-linked polyethylene insulating layer, the wrapping tape and the polyvinyl chloride sheath layer can be unnecessary, thereby saving process and production cost. the

The rare earth aluminum alloy conductor core is used to effectively reduce the production cost than the copper conductor core. the

Description of drawings

Figure 1 is a low-voltage single-core aluminum alloy cable, which is composed of a cross-linked polyethylene insulating layer 1 and a rare earth aluminum alloy conductor 2 from the outside to the inside. the

Figure 2, a low-voltage single-core aluminum alloy cable, which is composed of a cross-linked polyethylene insulating layer 1, a mica tape layer 3, and a rare earth aluminum alloy conductor 2 from the outside to the inside. the

Detailed ways

Example 1

Referring to Figure 1, a low-voltage single-core aluminum alloy cable is composed of a cross-linked polyethylene insulating layer 1 and a rare earth aluminum alloy conductor 2 from the outside to the inside. the

Example 2

Referring to Figure 2, a low-voltage single-core aluminum alloy cable is composed of a cross-linked polyethylene insulating layer 1, a mica tape layer 3, and a rare earth aluminum alloy conductor 2 from the outside to the inside. the

The rare earth aluminum alloy conductor is any one of a solid conductor, a compressed stranded conductor, and a tightly compressed stranded conductor. the

The material of the rare earth aluminum alloy conductor is mainly composed of elements such as aluminum, iron and rare earth. The conductor material also contains trace elements such as magnesium, copper, zinc, silicon, calcium, vanadium, titanium, chromium, and manganese. The aluminum alloy conductor core made of this material has a conductor conductivity ≥ 61% IACS, tensile strength ≥ 90Mpa, elongation at break ≥ 10%, and the minimum bending radius of the cable is 7 times the outer diameter of the cable. the

The material of the cross-linked polyethylene insulating layer is cross-linked polyethylene, and the cross-linking method of polyethylene can be silane cross-linking, chemical cross-linking or radiation cross-linking. The polyethylene insulating layer cross-linked by the above method has more excellent mechanical and physical properties and electrical properties, and has better aging resistance, and the service life can reach 40 years, which is far superior to polyvinyl chloride materials. Due to the excellent weather resistance and environmental corrosion resistance of the XLPE insulation layer, the service life is also significantly better than that of PVC, so the cable structure design is simpler, and there is no need for wrapping tape and PVC sheath layer , thus saving the processing and material costs of wrapping tape and sheath. the

Compared with copper, the cross-sectional area of aluminum alloy cable increases by 1.5 times, which can reach the conductivity standard of copper, and can achieve the same use effect as copper cable, and the cost of copper conductor accounts for about 70% of the total cost of copper cable, so aluminum alloy conductor is used Wire core can save a lot of cost. the

In order to make the cable have a flame-retardant effect, a flame retardant can be added to the cross-linked polyethylene material to improve the flame-retardant performance of the cable, making the aluminum alloy power cable more excellent in performance and more widely used. In order to increase the fire resistance of the cable, a layer of mica tape can be wrapped between the conductor core and the insulating layer. the

Claims (3)

1. A low-voltage single-core aluminum alloy power cable, characterized in that the cable is composed of a rare earth aluminum alloy conductor (2) and a cross-linked polyethylene insulating layer (1). 2. A low-voltage single-core aluminum alloy power cable according to claim 1, characterized in that: mica is also provided between the rare earth aluminum alloy conductor (2) and the cross-linked polyethylene insulating layer (1) Belt layer (3). 3. A low-voltage single-core aluminum alloy power cable according to claim 1 or 2, characterized in that: the rare earth aluminum alloy conductor (2) is a solid conductor, a compression stranded conductor, or a compact stranded conductor of any kind.

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