Fixture for replacing strain insulator string

Abstract

The invention relates to a tool for power construction, especially to a fixture for replacing a strain insulator string. The fixture comprises a cross-arm side clamp, a lead side clamp, an insulated connector and a tightening device, wherein the cross-arm side clamp is connected with the lead side clamp via the insulated connector, and the insulator connector is arranged at the two sides between the cross-arm side clamp and the lead side clamp; and the tightening device is used for shortening the relative distance between the cross-arm side clamp and the lead side clamp, is arranged at the two sides of the lead side clamp, penetrates through the lead side clamp and is then connected with the lead side clamp. The fixture of the invention can be conveniently, stably and fixedly mounted on line fittings where the strain insulator string is placed. In the process of insulator replacement, the two parallel sides of the insulator string are only equipped with insulated pull rods which are not conductive, and metal leading screws are placed behind the cross-arm side clamp and distanced from the insulator string, so that insulation performance of the insulator is not influenced.

Description

technical field [0001] The invention relates to a power working tool, in particular to a jig for replacing side strings of tension insulators. Background technique [0002] Existing equipment for replacing tension side string insulators of 500kV lines, as attached figure 1 As shown, it includes the clamp on the cross-arm side, the clamp on the wire side, and two sets of contraction assemblies whose two ends are respectively hinged to the two ends of the clamp on the cross-arm side and the clamp on the wire side. The clamp on the cross-arm side is a split type. It consists of two separate splints with symmetrical cavities. The cavity of the fixture on the cross-arm side matches the hanging point of the hardware on the cross-arm side. The shrinkage assembly is composed of a double-ended screw and an insulating tie rod. During operation, the two splints of the fixture on the cross-arm side are clamped successively on the hanging point of the hardware on the cross-arm side, and...

AI Technical Summary

Problems solved by technology

During operation, the two splints of the fixture on the cross-arm side are clamped successively on the hanging point of the hardware on the cross-arm side, and the cavity of the fixture on the wire side is fastened to the screw of the right-angle hanging plate, and then the shrinkage assembly is operated to loosen the insulator string. Then replace the degraded insulators in the loosened insulator strings. During the operation, the metal double-headed screw in the shrink assembly and the insulator string are on the same plane, and they are located on both sides of the insulator string, and are electrically conductive by the metal double-headed screw. Influenced by insulators, the insulation of several insulators on the insulator string that coincides with the lead screws on both sides will be greatly affected. In the process of live replacement, it is likely to cause the insulation failure of the insulators there.

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