Overhead bare stranded wire easy to recognize

Abstract

The invention provides an overhead bare stranded wire easy to recognize. The overhead bare stranded wire comprises an inner layer stranded wire body and outer layer stranded wire bodies, wherein the outside of the inner layer stranded wire body is lapped or longitudinally wrapped by a layer of metal foil, and perpetual recognition markings are arranged on the metal foil. The inner layer stranded wire body and the outer layer stranded wire bodies are formed by single wires in a stranding mode, and the single wires are round conductors or tile-shaped, or arch-shaped, or fan-shaped, or Z-type or hollow-circle shaped wire conductors. The material of the metal foil is the same as that of the outer layer stranded wire bodies or the adjacent inner layer stranded wire body. The metal foil with the perpetual recognition markings is arranged between the inner layer stranded wire body and the outmost layer stranded wire body, the recognition markings are easy to machine, not prone to erasure and free of damage to the surfaces of the conductors, in this way, specifications, types and technical parameters of products can be effectively recognized, and mixed usage will not be caused; a manufacturing factory can be effectively recognized, quality tracing is facilitated, and the overhead bare stranded wire easy to recognize is beneficial to circulation.

Description

technical field [0001] The invention relates to the field of power cables, in particular to an easily identifiable overhead bare twisted wire. Background technique [0002] Aerial bare stranded wire is a major product used in power transmission. It mainly includes: simple stranded wire, which is made of wires with the same material and equal diameter, such as aluminum stranded wire, aluminum alloy stranded wire, aluminum-clad steel stranded wire, etc.; combined stranded wire, which has a combination of conductive wire and reinforced wire Stranded, such as steel-cored aluminum strands, steel-cored aluminum alloy strands, etc.; special strands, wires of different materials and shapes, twisted in a special combination, such as expanded diameter wires, self-damping wires; Multiple stranded wires are made of bundles (twisted) strands of the same material, such as soft copper stranded wires. [0003] Regardless of the material and structure of the overhead bare stranded wire...

AI Technical Summary

Problems solved by technology

[0003] Regardless of the material and structure of the overhead bare stranded wire, due to its uneven exposed structure, it is difficult to ensure a smooth and smooth surface even if the profiled wire is used; in addition, from the perspective of power transmission, in order to prevent undue discharge And flashover phenomenon, it is required that the surface of the conductor that makes up the wire must be smooth. If the surface of the conductor is not smooth, it will easily cause the concentration of the local electric field, cause tip discharge or corona, and cause the local temperature of the wire to be too high during use, causing electrical performance and The decline in mechanical properties, severe or even fracture; secondly, if the application of identification marks is too cumbersome, it will lead to an increase in the manufacturing cost of the conductor, and it will be difficult to popularize and apply; thirdly, even if the surface is sprayed, the uneven surface will cause incomplete writing. It is difficult to identify, and the sprayed matter is easy to wipe off during processing, transportation and installation

The above reasons objectively limit the difficulty of applying permanent identification marks to overhead bare stranded wires, so the only way for overhead bare stranded wires is to use round or profiled wires without identification features.

Although people know that if no permanent identification mark is applied to the overhead bare stranded wire, it will be difficult for construction personnel and maintenance personnel to effectively identify product specifications and models; it is impossible to identify the manufacturer, and it is inconvenient to trace the quality. There are many wire and cable companies, which makes bad companies and personnel The manufacture of counterfeit and shoddy products has brought opportunities; it cannot be identified in the circulation and sales process, which is not conducive to anti-theft; during use, the sag of the overhead bare stranded wire is an important parameter for the service life and performance of the overhead bare stranded wire. Each group of overhead bare stranded wires can guarantee uniformity and have the same or similar tensile strength and sag. Therefore, each group of overhead bare stranded wires is required to be manufactured by the same manufacturer and the same batch with the same process parameters. Unrecognizable and easy to cause mixed use of overhead bare stranded wires from different manufacturers, different batches, and different process parameters

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