Conductor wire core for novel power cable

Abstract

The invention relates to a conductor wire core for a novel power cable, comprising an inner-layer molded wire and an outer-layer molded wire. The molded wires are produced by a molded wire filament drawing machine of which a molded wire filament drawing mold has the finish of less than 5; the single filaments of the inner-layer molded wire adopt round wires or combined round wires formed by combining 2 to 6 filaments with fan-shaped cross sections; the single filaments of the outer-layer molded wire are shaped like tiles and spirally stranded towards the same direction by using a frame-type strander; and the stranded wire core has a round cross section. The external diameter of the conductor wire core can be effectively reduced, and the consumption of outer-layer materials of the power cable can be saved. The conductor wire core has a smooth surface so that the risk of insulation breakdown is reduced. In addition, the rigidity and bend radius of the power cable are reduced so that the related power cable can be laid more conveniently.

Description

technical field [0001] The invention relates to the field of cable manufacturing, in particular to a novel conductor core for power cables. Background technique [0002] With the rapid development of the national economy, the demand for electric energy is increasing, and the proportion of power cables used for power transmission and distribution in power lines is also increasing rapidly. The wire and cable industry has become the second largest manufacturing industry, with annual sales more than 900 billion yuan. However, the traditional power cable products have backward technology, large quantity and low quality. Take the power cable as an example. Low-voltage power cables are composed of conductor cores, insulating layers, and sheath layers, while high-voltage power cable structures are composed of conductor cores, inner shielding layers, insulating layers, outer shielding layers, and sheath layers. The conductor cores of the first-generation power cables are stranded ...

AI Technical Summary

Problems solved by technology

But the conductor core that this kind of mode is produced still has the following deficiencies: 1, its filling coefficient of the conductor core that has been rolled or squeezed is at most 0.86, and the outer diameter is still too large, causing tens of millions of yuan of cable damage every year. The waste of layer materials, and the electric field on the surface of the conductor core rolled into a fan shape or tile shape is uneven, which may easily cause conductor breakdown; 2. After the round wire is pressed tightly, the surface layer may have burrs, and it is easy to break down under the condition of high voltage. Insulation, causing accident hazards; 3. Tightly stranded wire cores have high rigidity and large bending radius (15 times the cable diameter), making laying difficult

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