Steel core aluminum stranded wire aluminum embedded tensile wire clamp structure

Abstract

The invention discloses a steel core aluminum stranded wire aluminum embedded tensile wire clamp structure which comprises a casing wire clamp, a steel anchor crimped pipe, a steel core aluminum embedded pipe, an internal embedded layer aluminum pipe, an external embedded layer aluminum pipe and a wire shaping ring. The steel core aluminum embedded pipe is placed between a steel stranded wire of asteel core aluminum stranded wire crimping end and the steel anchor crimping pipe. The internal embedded layer aluminum pipe is placed between a steel stranded wire of a crimping end steel core aluminum stranded wire and an internal aluminum stranded wire layer, the crimping end steel core aluminum stranded wire is sleeved in the external embedded layer aluminum pipe, and the a sleeve hole of thecasing wire clamp sleeves the external embedded layer aluminum pipe on the steel core aluminum stranded wire and the steel anchor crimped pipe. According to the invention, the crushing damage, underpressure and loose strand of the steel core aluminum stranded wire are avoided, the manufacture is easy, the crimping quality is high, the non-destructive detection is avoided, and the labor intensityand engineering cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of steel-core aluminum stranded wire embedded aluminum tension clamps, and in particular relates to a steel core aluminum stranded wire embedded aluminum tension clamp structure. Background technique [0002] The existing steel-cored aluminum stranded wire strain clamp is mainly composed of a steel anchor crimping tube and an aluminum crimping tube. When crimping, first peel off a section of the aluminum stranded wire to expose the steel strand, and use the steel anchor crimping tube to crimp the steel strand. , and then use the aluminum alloy crimping tube to crimp the aluminum alloy connecting tube, aluminum strand, and steel strand together. This traditional crimping method is prone to two problems: [0003] (1) Damage to the steel core caused by the crimping of the steel anchor crimping tube [0004] In the traditional crimping process of tension clamps for overhead conductors in power transmission and...

AI Technical Summary

Problems solved by technology

[0004] In the traditional crimping process of tension clamps for overhead conductors in power transmission and transformation projects, the joints of galvanized steel strands (or aluminum-clad steel strands) of steel-cored aluminum strands are directly covered with steel strands by steel anchor crimping tubes. Line hydraulic connection, if the hardness of the steel anchor crimping tube and the steel strand does not match, the size of the crimping die is unreasonable, and the crimping pressure is insufficient, defects such as underpressure, loose strands, overpressure, and steel wire surface damage are prone to occur, resulting in joint grip Efforts not to meet standard requirements

Among the factors that cause steel strand crimping defects of steel cored aluminum stranded wire, the hardness mismatch between steel anchor crimping tube and steel strand is the most unavoidable. In the production process of aluminum clad steel strand, cold drawn steel wire passes through Liquid aluminum plating is equivalent to tempering once, and the hardness of the cold-drawn steel wire is reduced, resulting in a lower hardness of the steel strand than the steel anchor crimping tube. Focus on lowering

[0005] (2) It is difficult to guarantee the crimping quality of the aluminum sleeve clamp

[0008] In winter, when the temperature drops, because the steel core is in the elastic range, the cross section of the steel core becomes thinner, the pressure applied by the steel core to the aluminum strand decreases, and the cross section of the aluminum strand also shrinks, but because the aluminum strand has already undergone yield hardening, The cross-section of the aluminum strands did not expand due to the reduction in pressure, which resulted in gaps between the aluminum strands

[0009] Rainwater, air, dirt, and corrosive media infiltrate the gap between the aluminum strands of the joint, oxidize the surface of the aluminum strands, and generate aluminum oxide, which leads to increased contact resistance and heat generation at the crimping joints of the steel-reinforced aluminum strands. , eventually failing

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