Hydraulic crimping technology forstrain clamp for steel-cored aluminum stranded wire

Abstract

The invention provides a hydraulic crimping technology for a strain clamp for a steel-cored aluminum stranded wire. The technology comprises the following steps: peeling off the aluminum stranded wire outside a steel-cored aluminum stranded wire; sleeving an aluminum tube from one end of the steel-cored aluminum stranded wire, and inserting an exposed steel core into an inserting hole from a steel anchor port; pressing and fixing the front part of a steel anchor and the steel core of the steel-cored aluminum stranded wire; marking the position which is 20-30mm to the rear end of the steel anchor from the edge of a final annular groove of the steel anchor asa positioning mark A, and making a positioning mark C on the steel-cored aluminum stranded wire; pushing the aluminum tube to the side of the steel anchor; carrying out crimping by a hydraulic machine, continuously exerting pressure from left to right from the left end of the aluminum tube corresponding to the mark C for at least three times; not crimping an inserting segment, corresponding to the steel core and the steel anchor, of the aluminum tube, and finally exerting pressure once towards the right from the annular groove of the steel anchor. The hydraulic crimping technology has the beneficial effects that the 'Chinese enkianthus' phenomenon at the side of the crimped wire can be avoided by the crimping technology; the wire crimping effect is good; the crimping efficiency is high; and the conductive effect and the born tension after crimping can be ensured.

Description

technical field [0001] The invention relates to a process method, in particular to a hydraulic process for steel-cored aluminum stranded wire tension clamps. Background technique [0002] With the large-scale construction and transformation of the power grid in the past ten years, the wide application of new products and new technologies, the technology originally used for hydraulic compression of overhead power transmission line conductors has been widely used in the production and construction of substations. [0003] At present, the hydraulic technology of steel-cored aluminum stranded wire tension clamps is basically carried out in accordance with the operating procedures stipulated in the "Overhead Power Transmission Line Conductor and Lightning Protection Wire Hydraulic Construction Process Specification SDJ226-87 (Trial)". However, in In power substation projects, the phenomenon of "lantern flower" often occurs on the wire side after the hydraulic crimping of the tens...

AI Technical Summary

Problems solved by technology

[0003] At present, the hydraulic technology of steel-cored aluminum stranded wire tension clamps is basically carried out in accordance with the operating procedures stipulated in the "Overhead Power Transmission Line Conductor and Lightning Protection Wire Hydraulic Construction Process Specification SDJ226-87 (Trial)". However, in In substation engineering, it often happens that "lantern flowers" appear on the wire side after the hydraulic crimping of the tension clamp

[0004] Especially for the operation on the bus in the substation, due to the short span of the bus and many drainage wires, it is better to use T-shaped bolt clamps for the drainage clamps. Once the T-shaped hydraulic clamps are used, the phenomenon of "lantern flowers" will become more prominent. Almost universal, the size of the lantern flower varies, the largest can reach more than three times the diameter of the original wire, not only unsightly, but also affect the conductive effect of the wire, and reduce the tensile force on the wire

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