RU2256251C2 - Uninsulated steel copper wire - Google Patents

Abstract

FIELD: uninsulated (bare) wires and current-conducting bodies consisting of several wires twisted in the form of a rope.

SUBSTANCE: bimetallic wire forming the conductor is replaced by a bimetallic structure of wire. The wire consists of seven copper and twelve steel conductors, the first and the six subsequent conductors are copper ones, the rest twelve conductors are steel ones, the copper conductors have a lay of a strand within 100 to 150 mm, and the rest conductor - 150 to 200 mm, the steel conductor may have a zinc-coated surface.

EFFECT: enhanced service life of wire and reduced cost of wire.

2 cl, 1 dwg

Description

The invention relates to bare (bare) wires and conductive bodies, consisting of several wires twisted in the form of a rope.

Known copper uninsulated wire for overhead power lines (GOST 839-80. Uninsulated wires for overhead power lines. Technical conditions. - Reprint. September 2002 with changes 1 and 2. - Instead of GOST 839-74. Introduction. 01.01.81. -to standards, 2002. - 21 pp. Group E41), consisting of one or more copper wires (1, 7, 19, 37) with the number of coils from 1 to 3, the coils are twisted in opposite directions, with the outer coiling having the right twist direction. The main disadvantage of copper wires is their high cost and, currently, insecurity from vandalism. Also known is a non-insulated bimetallic steel-copper wire - prototype - (GOST 4775-91. Non-insulated bimetallic steel-copper wire. Technical conditions. - Instead of GOST 4775-75. Introduction. 01/01/92. - M .: Publishing house of standards, 1992. - 12 sec. . Group E41), consisting of several (7, 19) bimetallic wires with a minimum thickness of a copper sheath according to GOST 3822-79 (GOST 3822-79. Steel bimetallic copper wire. Technical conditions. - Rev. 1, 2, 3. - M. : Publishing house of standards, 1987, - 7 pp. Group B74), with twisting of the coils in opposite directions, with the outer coiling having avoe direction of twist. In a nineteen-wire wire (1-6-12), the twisting pitch of a twig of twelve wires is not greater than the multiplicity of a twisting step of a twisting of six wires. The use of bimetallic wire reduces the consumption of copper, but complicates the technology of its production. In addition, a thin copper coating is often damaged by track machines and the copper color of the wire does not protect it from vandalism.

The aim of the invention is to reduce the cost and increase the life of the wire.

This goal is achieved in that the bimetallic wire forming the wire is replaced with a bimetallic wire construction.

The essence of the invention is that the wire consists of seven copper and twelve steel wires, with the first and six subsequent wires being copper, the remaining twelve wires being steel, while the copper wires have a twisting pitch of 100-150 mm and the steel wires have 150- 200 mm, and steel wires have a galvanized surface.

The drawing shows a diagram of non-insulated steel-copper wire of a bimetallic structure consisting of copper 1 and steel 2 wires.

The wire in the opposed wire is a steel-copper bimetal system, the core of which is made of steel of a certain grade, and the copper sheath, depending on the diameter and grade of the wire, has a thickness of 0.1 to 0.42 mm, must be continuous without captivity, shells, sunsets, delaminations, blisters and cracks exposing the core (GOST 3822-79). The manufacture of such a wire requires complex and accurate rolling and drawing equipment, which significantly increases the cost of the wire, in addition, copper is susceptible to oxidation in the surface layer.

The copper and steel wire used in the proposed steel-copper wire does not require special equipment in the manufacture, and the copper wire is located inside the wire and is protected by a sheath of galvanized steel wire, which has such a twisting pitch that the copper wire is not visible, therefore, is protected from oxidation, mechanical damage, and vandalism. In addition, the proposed wire has a higher conductivity due to the larger total cross-sectional area of copper wires.

An example of a specific implementation. Internal winding: round copper electrotechnical wire (TU 16. K71-087-90) with a diameter of 2.49 mm, the number of wires - 7 pcs., The twisting pitch of the winding is 150 mm, twisted to the left; external winding: galvanized steel wire (GOST 3282-74 or GOST 15892-70) with a diameter of 2.5 mm, the number of wires - 12 pcs., twisting pitch of the winding 200 mm, twisted to the right. The mass of 1 m of wire is 0.785 kg, including the mass of copper wire - 0.310 kg, the mass of steel wire - 0.475 kg, the cross section of 0.5 mm ² .

Thus, the proposed design of non-insulated steel-copper wire allows to increase the service life of the wire, reduce the cost of 1 ton of wire, protect the wire from theft.

Claims (2)

1. Non-insulated steel-copper wire, consisting of nineteen wires, arranged according to the scheme: one-six-twelve (1-6-12), starting from the axis of the wire, with an inner and outer winding of the wire, twisting of the windings is carried out in opposite directions, with the outer winding has a right-hand twist direction, characterized in that the wire consists of seven copper and twelve steel wires, with the first and six subsequent wires being copper, the remaining twelve wires being steel, while the copper wires have a twisting pitch wa 100-150 mm, and steel wires - 150-200 mm. 2. The wire according to claim 1, characterized in that the steel wires have a galvanized surface.