Overhead two-core user lead-in cable

Abstract

The invention discloses an overhead two-core user lead-in cable, and includes two copper-magnesium alloy conductors, outer surfaces of the copper-magnesium alloy conductors are wrapped by polyethylene layers to form leads, the two leads are intertwisted to form a stranded wire pair, An aluminum foil wraps an outer surface of the stranded wire pair, a polyvinyl chloride layer wraps an outer surface of the aluminum foil, a polyethylene sheath layer warps an outer surface of the polyvinyl chloride layer, and each copper-magnesium alloy conductor comprises the following components in parts by weight: 80-90 parts of copper, 10-15 parts of magnesium, 1.5-3 parts of indium, 0.04-0.06 part of silicon, 1-1.3 parts of iron, 0.18-0.28 part of copper, 0.08-0.1 part of rare earth elements, 0.015-0.03 part of boron, 0.01-0.02 part of titanium, and 0.01-0.02 part of beryllium. The rare earth elements consist of lanthanum, cerium and scandium which form the rare earth elements by mixing according to a proportion of 10:4:1 in parts by weight. The overhead two-core user lead-in cable provided by the invention has an obviously improved metal structure, passes a production test and has greatly improved tensile strength and elongation in subsequent wiredrawing.

Description

technical field [0001] The invention relates to a wire core of a telephone line, in particular to an overhead two-core user lead-in cable. Background technique [0002] The existing telephone wires have two cores and four cores, and the diameters of the core wires are 0.4~1.0mm respectively. The structure is generally two or four core wires wrapped with polyethylene. The common core wire materials are copper-clad steel, copper-clad Aluminum, copper, etc. The existing telephone line structure determines that its tensile strength is limited. When long-distance installation is required, it is necessary to set up special steel cables for reinforcement, otherwise it is easy to break. Especially when installing in some inconvenient areas such as mountainous areas, specially set up steel cables It greatly increases the difficulty of construction and is easily damaged. Contents of the invention [0003] The invention provides an overhead type two-core user lead-in cable. The met...

AI Technical Summary

Problems solved by technology

The existing telephone line structure determines that its tensile strength is limited. When long-distance installation is required, it is necessary to set up special steel cables for reinforcement, otherwise it is easy to break. Especially when installing in some inconvenient areas such as mountainous areas, specially set up steel cables Greatly increases the difficulty of construction and is easily damaged

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