High-elongation aluminum clad steel wire

Abstract

The utility model relates to wire technical field discloses a kind of high elongation rate aluminium-clad steel wire, including steel wire, aluminium cladding, aluminium outer layer, the steel wire is located in the centre of steel wire, and multiple steel wires are concentrically stranded, and steel wire core is formed, and the outside of wire core is covered with belt layer, aluminium outer layer, the utility model wire uses aluminium-clad steel core as reinforcing core, outer layer stranded aluminium wire, with Good conductivity, corrosion resistance, simple structure, high elongation rate and high strength characteristics.The internal wire core structure design makes wire can withstand greater plastic deformation before breaking, improves elongation, so that wire under repeated stress, absorb energy, reduce the risk of crack initiation and expansion.Wire in the process of use, after bending, traction and tension, also can avoid the fracture caused by local stress concentration.

Description

Technical Field

[0001] This utility model relates to the field of conductors, and in particular to a high elongation aluminum-clad Invar wire. Background Technology

[0002] Currently, in my country's overhead conductor manufacturing industry, aluminum-clad Invar steel core heat-resistant conductors are used as a type of capacity-enhancing conductor, playing a load-bearing role during line operation. The tensile strength and elongation of aluminum-clad Invar steel wire directly affect the overall breaking force of the conductor.

[0003] Patent application CN discloses an ultra-strong steel-core aluminum alloy stranded wire, which consists of a first inner steel core, a second inner steel core, a third inner steel core, a first outer aluminum cladding, a second outer aluminum cladding, and a third outer aluminum cladding. The second inner steel core, the third inner steel core, the first outer aluminum cladding, the second outer aluminum cladding, and the third outer aluminum cladding are sequentially wrapped around the first inner steel core. The first inner steel core is made of 7 ultra-strong galvanized steel wires, the second inner steel core is made of 12 ultra-strong galvanized steel wires, the third inner steel core is made of 18 ultra-strong galvanized steel wires, the first outer aluminum cladding is made of 18 high-strength aluminum alloy wires, the second outer aluminum cladding is made of 24 high-strength aluminum alloy wires, and the third outer aluminum cladding is made of 30 high-strength aluminum alloy wires.

[0004] The elongation of the stranded wire in this prior art needs to be improved.

[0005] Therefore, a new technical solution is needed to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to provide a high elongation aluminum-clad Invar steel wire, which uses an aluminum-clad Invar steel core as a reinforcing core and an outer layer of stranded aluminum wire, and has the characteristics of good conductivity, corrosion resistance, simple structure, high elongation and high strength.

[0007] The technical solution adopted in this utility model is: The high elongation aluminum-clad Invar wire includes Invar wire, aluminum cladding layer, and aluminum outer cladding layer. The Invar wire is located in the center of the Invar wire. Multiple Invar wires are concentrically twisted to form the Invar wire core. The core is covered with a strapping layer and an aluminum outer cladding layer.

[0008] By adopting the above structure, using an aluminum-clad Invar core as the reinforcing core and an outer layer of stranded aluminum wire, it has the characteristics of good conductivity, corrosion resistance, simple structure, high elongation and high strength.

[0009] Preferably, the outer layer of the Invar wire is provided with an aluminum cladding layer, which is a high-purity aluminum layer with good electrical conductivity and corrosion resistance.

[0010] Preferably, the aluminum cladding layer outside the Invar wire is firmly attached to the outside of the Invar wire by drawing or extrusion technology, ensuring that there are no obvious interface defects between the two.

[0011] By adopting the above structure and the internal core structure design, the conductor can withstand greater plastic deformation before breakage, improve elongation, and absorb energy under repeated stress, reducing the risk of crack initiation and propagation.

[0012] Preferably, the outer sheath of the Invar wire core is a polypropylene ribbon layer, which is lightweight and highly corrosion-resistant. When subjected to strong tensile force, the polypropylene ribbon layer can reduce the friction between the wire core and the outer sheath.

[0013] Preferably, the aluminum cladding outer layer includes a first aluminum cladding outer layer and a second aluminum cladding outer layer.

[0014] Preferably, the first outer layer of aluminum cladding and the second outer layer of aluminum cladding are twisted together and wrapped around the wire core, and the twisting directions of the first outer layer of aluminum cladding and the second outer layer of aluminum cladding are opposite.

[0015] By adopting the above structure, the conductor can avoid breakage caused by local stress concentration even when it is bent, pulled and tensioned during use.

[0016] Preferably, the outer layer of the aluminum cladding is provided with a protective sleeve layer.

[0017] Compared with the prior art, this utility model has the following advantages: 1. The conductor of this utility model uses an aluminum-clad Invar core as a reinforcing core and an outer layer of stranded aluminum wire, which has the characteristics of good conductivity, corrosion resistance, simple structure, high elongation and high strength.

[0018] 2. The internal core structure design of the conductor in this utility model enables the conductor to withstand greater plastic deformation before breakage, improves elongation, and allows the conductor to absorb energy under repeated stress, reducing the risk of crack initiation and propagation.

[0019] 3. The structure of this utility model enables the conductor to avoid breakage caused by local stress concentration even when it is bent, pulled and tensioned during use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the internal Invar wire structure of this utility model.

[0021] The components are: 1. Invar wire; 2. Aluminum cladding layer; 3. First outer aluminum cladding layer; 4. Second outer aluminum cladding layer; 5. Sheath layer; 6. Strap layer. Detailed Implementation

[0022] like Figure 1-3 As shown, the high elongation aluminum-clad Invar wire includes Invar wire 1, aluminum cladding layer 2, and aluminum outer layer. The Invar wire 1 is located in the center of the Invar wire, and multiple Invar wires 1 are concentrically twisted to form the Invar wire core. The core is covered by a strapping layer 6 and an aluminum outer layer. A sheath layer 5 is provided outside the aluminum outer layer. This conductor structure uses an aluminum-clad Invar core as the reinforcing core and an outer layer of stranded aluminum wire, which has the characteristics of good conductivity, corrosion resistance, simple structure, high elongation and high strength.

[0023] An aluminum cladding layer 2 is formed on the outside of the Inductor wire 1. The aluminum cladding layer 2 is a high-purity aluminum layer with good electrical conductivity and corrosion resistance. The aluminum cladding layer 2 is firmly attached to the outside of the Inductor wire 1 through drawing or extrusion technology, ensuring that there are no obvious interface defects between the two. The internal core structure design of the conductor enables the conductor to withstand greater plastic deformation before breakage, improves elongation, and allows the conductor to absorb energy under repeated stress, reducing the risk of crack initiation and propagation.

[0024] The outer sheath layer 6 of the Invar wire core is a polypropylene ribbon layer, which is lightweight and highly corrosion resistant. When subjected to strong tensile force, the polypropylene ribbon layer can reduce the friction between the wire core and the outer sheath layer.

[0025] The aluminum-clad outer layer includes a first aluminum-clad outer layer 3 and a second aluminum-clad outer layer 4. The first aluminum-clad outer layer 3 and the second aluminum-clad outer layer 4 are twisted together and wrapped around the conductor core, with the twisting directions of the first aluminum-clad outer layer 3 and the second aluminum-clad outer layer 4 being opposite. This structure prevents the conductor from breaking due to localized stress concentration during use, even when subjected to bending, pulling, and tension.

[0026] This practical conductor exhibits high fatigue resistance: under repeated stress conditions, such as wind vibration and temperature cycling, its high elongation helps absorb energy, reducing the risk of crack initiation and propagation; it also boasts high construction adaptability: during line erection, the conductor needs to be bent, pulled, and tensioned, and its high elongation prevents breakage caused by localized stress concentration; it has high impact resistance: when facing ice loads, lightning strikes, or other sudden loads, the material can better disperse stress, improving overall safety; and it is compatible with existing equipment: compared to traditional aluminum stranded wire or aluminum steel-cored wire (ACSR), its high elongation makes it easier to use with existing hardware, clamps, and construction techniques.

[0027] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should be included within the scope of protection defined by the claims of the present utility model.

Claims

1. A high elongation aluminum-clad Invar wire, comprising Invar wire, an aluminum cladding layer, and an aluminum outer cladding layer, characterized in that: The Invar wire is located in the center of the Invar wire. Multiple Invar wires are concentrically twisted together to form the Invar wire core. The core is covered with a strapping layer and an aluminum cladding layer.

2. The high elongation aluminum-clad Invar wire according to claim 1, characterized in that: The outer layer of the Invar wire is coated with an aluminum cladding layer, which is a high-purity aluminum layer with good electrical conductivity and corrosion resistance.

3. The high elongation aluminum-clad Invar wire according to claim 2, characterized in that: The aluminum cladding layer on the outside of the Invar wire is firmly attached to the outside of the Invar wire by drawing or extrusion technology, ensuring that there are no obvious interface defects between the two.

4. The high elongation aluminum-clad Invar wire according to claim 1, characterized in that: The outer sheath of the Invar wire core is a polypropylene ribbon layer, which is lightweight and highly corrosion-resistant. When subjected to strong tensile force, the polypropylene ribbon layer can reduce the friction between the wire core and the outer sheath.

5. The high elongation aluminum-clad Invar wire according to claim 1, characterized in that: The aluminum cladding outer layer includes a first aluminum cladding outer layer and a second aluminum cladding outer layer.

6. The high elongation aluminum-clad Invar wire according to claim 5, characterized in that: The first and second outer layers of the aluminum cladding are twisted together and wrapped around the wire core, with the twisting directions of the first and second outer layers of the aluminum cladding being opposite.

7. The high elongation aluminum-clad Invar wire according to claim 1, characterized in that: The outer layer of the aluminum cladding is provided with a protective sleeve.

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