RU144515U1 - ELECTRIC TRANSMISSION WIRE - Google Patents

Abstract

1. A wire for a power line containing a steel core and conductive fluffs, characterized in that at least a portion of the conductive fluffs are made of aluminum nanocomposite wire reinforced with multilayer carbon nanotubes. 2. A wire according to claim 1, characterized in that the nanocomposite wire coils alternate with the aluminum wire coils. 3. The wire according to claim 1, characterized in that the nanocomposite wire is obtained by multiple cold drawing to a given diameter.

Description

Technical field

The utility model relates to the electric power industry and can be used in stranded wires for overhead power lines.

State of the art

Known electrical wire from aluminum alloy (patent RU No. 2422223, IPC B21C 1/00, 2010), which contains the core and the surface layer located around it, obtained by drawing a wire billet with a tensile strength of 16 ... 18 kgf / mm ² (160-180 MPa). The use of the invention allows to increase the micro-continuity of the surface layer of the wire, its strength and electrical conductivity.

The disadvantage is the use of special materials (expensive rare-earth elements) in the aluminum alloy for the core, as well as the preservation of reduced core strength.

Known selected as a prototype "Wire for power lines" according to patent RU No. 2063080. The wire contains a steel core and several conductive coils of aluminum wires. The core is made of non-magnetic nitrogen-containing austenitic steel with low magnetic permeability and increased strength. Aluminum coils are made of wires of various diameters, with the largest being the diameter of the outer coils of wires.

The disadvantage of this solution is that in the construction of the wire are used midi from aluminum wire, which has a relatively low mechanical strength, further reduced by long-term exposure to mechanical stress. The result is the perception of the mechanical load of only the steel central core of a multiwire cable, as a result of which the performance of the wire is reduced, its resistance to sagging is reduced.

The objective of the claimed utility model is to create a wire with a high current throughput, having a lower mass, greater mechanical strength and resistance to sagging.

Utility Model Disclosure

The subject of a utility model is a wire for a power line, comprising a core of steel wire and conductive wires of wires wound thereon, characterized in that at least a portion of the conductive wires is made of aluminum nanocomposite wire reinforced with multilayer carbon nanotubes.

This allows you to increase throughput, mechanical strength and resistance to sagging wires without increasing its mass.

The utility model has development, which consists in the fact that:

- coils of nanocomposite wire alternate with coils of aluminum wire;

- nanocomposite wire obtained by multiple cold drawing to a given diameter.

Developments can further increase the wire throughput, while maintaining its high mechanical strength and resistance to sagging.

Utility Model Implementation

FIG. 1 illustrates the claimed construction of a wire with a core 1 of steel wire, on which conductive coils of wire 2 are wound. As wires 2 of which all coils are made, a nanocomposite wire formed by repeated cold drawing of a wire billet made of aluminum reinforced with multilayer carbon nanotubes.

FIG. 2 illustrates the claimed construction of a wire with a core 1 of steel wire, on which coils of two types of conductive wires are wound - nanocomposite wire 2 and aluminum wire 3. In this case, coils of wire 2 alternate layer by layer with coils of wire 3.

The increased mechanical strength of the wire of the claimed design is achieved due to the fact that the mechanical load on the wire is perceived not only by its steel core 1, but also by the meanings of the conductive nanocomposite wire 2.

Wire 2 is formed from a wire billet (wire rod) obtained from a nanocomposite powder based on aluminum, which provides wire 2 with a high conductivity, and reinforcing nanoparticles - multilayer carbon nanotubes.

In the process of multiple cold drawing of a wire billet (i.e. successive cold drawing through a series of dies with a decreasing hole diameter), the nanocomposite wire undergoes intense plastic deformation, which increases the degree of interaction between the base material (aluminum) and the filler (multilayer carbon nanotubes).

Layer-by-layer alternation of coils of nanocomposite wire 2 with coils of aluminum wire 3 increases the conductivity of the wire while maintaining its high mechanical properties.

Examples of specific implementations of the inventive wire.

The wire whose construction is shown in FIG. 1, has a core 1 of steel wire with an indicator of temporary tensile strength of 1400 MPa, and coils of 18 wires 2, arranged in two layers around the core 1. The content of multilayer carbon nanotubes in the material of nanocomposite wires is 0.5 wt.%, Their indicator is temporary tensile strength 300 MPa. The mass of 1 km of wire is 400 kg.

The breaking force for such a wire is 48066 N, which is 66% higher than the corresponding indicator for a steel-aluminum wire of a similar design. Electrical resistance of 1 km of DC wire at 20 ° C - 0.2373 Ohms.

The wire whose construction is shown in FIG. 2, has a core 1 of steel wire with a temporary tensile strength of 1400 MPa and coils of conductive wires 2 and 3, arranged in alternating layers around the core 1.

The first layer (closest to core 1) is formed by 6 nanocomposite wires 2, the second layer is 12 aluminum wires 3, the third layer is 18 nanocomposite wires 2. For wires 3, the index of temporary tensile strength is 150 MPa. Weight 1 km of wire - 756 kg

The breaking force for such a wire is 73513 N, which is 53% higher than the corresponding indicator for a steel-aluminum wire of a similar design. The electrical resistance of 1 km of DC wire at 20 ° C is 0.1179 Ohms.

Claims (3)

1. A wire for a power line comprising a steel core and conductive fluffs, characterized in that at least a portion of the conductive fluffs is made of aluminum nanocomposite wire reinforced with multilayer carbon nanotubes. 2. The wire according to claim 1, characterized in that the coils of nanocomposite wire alternate with coils of aluminum wire. 3. The wire according to claim 1, characterized in that the nanocomposite wire is obtained by multiple cold drawing to a predetermined diameter.