Seven-stranded steel strand embedded aluminum strain clamp crimped structure and crimping method thereof

Abstract

The invention discloses a seven-stranded steel strand embedded aluminum strain clamp crimped structure and a crimping method thereof. The seven-stranded steel strand embedded aluminum strain clamp crimped structure includes a steel anchor crimping pipe and an aluminum embedded pipe; the aluminum embedded pipe is embedded into the steel anchor crimping pipe and wraps and sleeves seven circular concentric stranded overhead conductor steel strands which connected with a strain clamp end; and the steel anchor crimping pipe enables the aluminum embedded pipe to be tightly attached to the seven circular concentric stranded overhead conductor steel strands, so that a steel strand strain joint is obtained. According to the seven-stranded steel strand embedded aluminum strain clamp crimped structure and the crimping method thereof of the invention, the aluminum embedded pipe layer is additionally arranged between the steel anchor crimping pipe and the seven circular concentric stranded overheadconductor steel strands. On the basis of the high plasticity and high static friction coefficient of the aluminum embedded pipe, damage to the seven steel strands due to the pressing of the strain clamp, insufficient pressing of the seven steel strands, and the looseness of the seven steel strands when the steel anchor crimping pipe and the seven steel strands are crimped can be avoided; requirements for the holding force of the joint are satisfied; the butt joint and crimping of the seven stranded steel strands are easier to implement; the crimping quality of the seven stranded steel strandsis higher; and nondestructive detection is not required to be performed on the crimped joint, and therefore, labor intensity and engineering cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of crimping of 7 stranded steel strands embedded with aluminum tension clamps, and in particular relates to a crimping structure and a crimping method of 7 stranded steel strands embedded with aluminum tension clamps. Background technique [0002] In the traditional splicing 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 strands are all hydraulically connected by steel anchors directly covering the strands. The hardness of the steel anchor and the steel strand does not match, the size of the crimping die is unreasonable, and the crimping pressure is insufficient. Defects such as undervoltage, loose strands, overpressure, and steel wire surface damage are prone to occur, resulting in the gripping force of the joint not meeting the standard requirements. Among the factors that ...

AI Technical Summary

Problems solved by technology

[0002] In the traditional splicing 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 strands are all hydraulically connected by steel anchors directly covering the strands. The hardness of the steel anchor and the steel strand does not match, the size of the crimping die is unreasonable, and the crimping pressure is insufficient. Defects such as undervoltage, loose strands, overpressure, and steel wire surface damage are prone to occur, resulting in the gripping force of the joint not meeting the standard requirements.

Among the factors that cause the steel strand crimping defects of the steel strand, the hardness mismatch between the steel anchor and the steel strand is the most unavoidable. In the production process of the aluminum clad steel strand, the cold drawn steel wire passes through the liquid aluminum plating , quite a tempering, the hardness of the cold-drawn steel wire is reduced, resulting in a lower hardness of the steel strand than the steel anchor, and the inner wall of the steel anchor bites the steel strand wire during crimping, resulting in a decrease in the gripping force of the joint

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