Equipotential access method of 500kV same-tower four-circuit transmission line tangent tower live-wire work

A technology for accessing equipotential and transmission lines, applied in the direction of overhead lines/cable equipment, etc., can solve problems such as the inability to use 500kV four-circuit transmission lines on the same tower, and achieve the effect of improving safe and stable operation level and high safety

Inactive Publication Date: 2010-06-09
STATE GRID ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the 500kV same-tower four-circuit straight-line tower has only cross-arms and no tower body around the outer 6-phase conductors. The conventional 500kV access equipotential method cannot be used for 500kV same-tower four-circuit transmission lines. Therefore, it must be adopted according to the characteristics of 500kV same-tower four-circuit lines. New Entry Equipotential Method

Method used

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  • Equipotential access method of 500kV same-tower four-circuit transmission line tangent tower live-wire work
  • Equipotential access method of 500kV same-tower four-circuit transmission line tangent tower live-wire work
  • Equipotential access method of 500kV same-tower four-circuit transmission line tangent tower live-wire work

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Embodiment Construction

[0021] In the following, the method for entering equipotentiality during live work on a straight line tower of a 500kV four-circuit transmission line on the same tower will be described in detail in conjunction with the accompanying drawings and embodiments.

[0022] figure 1 Marks in: 1-tower body, 2-cross arm, 3-outer wire, 4-inner wire, 5-insulator.

[0023] figure 2 Marks in: 6-insulated soft ladder, 7-insulated control rope, 8-insulated tackle.

[0024] image 3 Markings in: 9-rail, 10-centipede ladder, 11-hanging chair.

[0025] The schematic diagram of the soft ladder method in the embodiment of the present invention is as figure 2 As shown, the insulating soft ladder 6 is hung on the end of the cross arm 2, and the insulating block 8 equipped with the insulating control rope 7 is installed in the middle of the cross arm 2.

[0026] The schematic diagram of the slide rail-centipede ladder-hanging chair method in the embodiment of the present invention is as follo...

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Abstract

The invention provides an equipotential access method of a 500kV same-tower four-circuit transmission line tangent tower live-wire work which can safely access into an outside 6-phase wire by adopting a sliding rail-centipede-type ladder-hanging seat method or a flexible ladder method. The sliding rail-centipede-type ladder-hanging seat method is characterized in that beside the outside wire, one end of an insulated centipede-type ladder is connected with a hanging seat, the other end of the insulated centipede-type ladder is connected with a sliding rail, the sliding rail is arranged at the upper end of the outside wire near the tail end of a cross arm; and the flexible ladder method is characterized in that the insulated flexible ladder is hung at the tail end of the cross arm, and a pulley provided with an insulated control rope is arranged in the middle of the cross arm. The two methods can both ensure that the equipotential access operation of the 500kV same-tower four-circuit transmission line tangent tower live-wire work is finished safely and smoothly.

Description

technical field [0001] The invention relates to a 500kV same-tower four-circuit transmission line line tower live operation entering equipotential method, which belongs to the technical field of transmission line operation and maintenance. Background technique [0002] The 500kV four-circuit transmission line on the same tower has the advantages of large transmission capacity and less land occupation of line corridors. A 500kV four-circuit transmission line with the same tower has been built in East my country. The linear tower of the line adopts a three-layer cross-arm tower type, each layer of cross-arm is divided into left and right sides, each side has inner and outer conductors, the inner conductor is close to the tower body, and the outer conductor is far away from the tower body. Such as figure 1 shown. [0003] Live work is an important means to ensure the safe and stable operation of transmission lines. Therefore, after the 500kV four-circuit transmission line on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/02
Inventor 胡毅王力农刘凯陆景德周腾刘庭胡建勋肖宾马益峰华刚
Owner STATE GRID ELECTRIC POWER RES INST
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