Three-span ground wire tension string and tower connecting device

Abstract

The invention relates to a three-span ground wire tension string and tower connecting device, which belongs to the technical field of three-span transmission lines. The device comprises a ground wirehanging plate 12 arranged on a tower ground wire crossarm 11, a channel steel 13, a stiffening plate 14, and tower connecting hardware strings I and II between a fastening bolt 15 and an LV connectingplate (or triangular connecting plate). The tower connecting hardware strings I and II are arranged vertically or horizontally. A U-shaped hanging ring 3, a tension clamp 4, a ground wire 5 and a ground wire 6 are arranged in order on the right side of the LV connecting plate (or triangular connecting plate). One end of the ground wire 5 is connected with the ground hole of the ground wire crossarm 11, and the other end is connected with the tension clamp 4. A safety backup string 7 is composed of an inner twisted wire, an outer twisted wire and a QH heart-shaped ring. One end is loosely connected with the channel steel 13, and the other end is pre-twisted to the ground wire 6. According to the invention, two-link double-hanging and two-link single-hanging of a ground wire tension stringunder different line corners are realized; the safety backup string without wearing the ground wires is added, realizing a third hanging point and preventing string dropping. Figure 1 is the three-span ground wire tension string and tower connecting device.

Description

technical field [0001] The invention relates to a three-span ground wire tension string and tower connection device, which belongs to the technical field of "three-span" overhead transmission lines (that is, across high-speed railways, expressways and important power transmission channels) Background technique [0002] So far, the 110-1000kV ground wire tension series towers are mainly divided into two types: single-connected single-hung and double-connected single-hung, and the double-connected horizontally arranged. In recent years, there have been several disconnection accidents on overhead transmission lines across high-speed railways and expressways, which have seriously hindered traffic and caused great social impact, which has attracted great attention. Documents [1-4] have made provisions on the standardized design and design precautions of ground wire tension strings, but they still remain in the two methods of single-connection and single-hanging and double-connect...

AI Technical Summary

Problems solved by technology

[0023] During the long-term operation of the connecting tower fittings, there is a phenomenon of pin drop, and the phenomenon of string drop may occur; in order to prevent the occurrence of drop accidents, literature [6] added a safety backup string on the ground wire side of the ground wire tensi

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