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 tension string. The disadvantage is that The bifurcation of the safety backup string and the ground wire may cause the wear of the outer layer monofilament under the condition of ice-covered dancing or hurricane; The two ends of the wire are twisted outward, and each end of the wire protrudes 50-100mm

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