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Construction method for replacing cross arm of 35kV line linear rod

A construction method and straight rod technology, applied in the direction of overhead lines/cable equipment, etc., can solve the problems of high labor intensity of operators, affecting the normal operation of the crossed transmission line, and long construction time, so as to achieve simple and feasible construction methods and improve safety performance and reliability, and the effect of ensuring the quality of power supply

Active Publication Date: 2011-09-14
MIANYANG POWER SUPPLY COMPANY STATE GRID SICHUANELECTRIC POWER +1
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Problems solved by technology

After that, install and hook all the wires that have been placed on the ground on the new cross-arm, and complete the construction. This construction method has the following defects: 1. The labor intensity of the operators is high; 2. The construction time is long; 3. The impact is crossed Normal operation of transmission lines

Method used

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  • Construction method for replacing cross arm of 35kV line linear rod
  • Construction method for replacing cross arm of 35kV line linear rod

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Embodiment Construction

[0017] Replacement Straight Rod Cross Arm with Tension:

[0018] Construction principle: to successfully transfer the hanging point of the three-phase wire to the pole, so that the old cross-arm is completely emptied and replaced with a new cross-arm. It is the key of the present invention to keep the balance of force on the shaft all the time in the transfer process.

[0019] Construction points: in the process of work must meet:

[0020] 1. The wire must not lose the "secondary protection" of the wire sleeve on the wire at any time;

[0021] 2. Special personnel must be arranged to monitor the force of the pole at any time and the safe distance of crossing the power line under the line.

[0022] Tool preparation:

[0023] 1. 3 2T ratchet-type wire tensioners (used for lifting wires);

[0024] 2. Three φ14×1m steel wire sleeves (three 2T ratchet-type wire tensioners are hung on the shaft for use);

[0025] 3. 1 piece of φ12×2m steel wire sleeve (used for "secondary prote...

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Abstract

The invention provides a construction method for replacing a cross arm of a 35kV line linear rod. During the construction process, three side phase conducting wire suspension points on the old cross arm are safely transferred to a rod body by a tool so that the cross arm on the linear rod are completely emptied out; subsequently the old cross arm is replaced by a new cross arm; and subsequently the reverse operation is carried out based on the above steps so that the three side phase conducting wire suspension points are transferred from the rod body to the new cross arm, thus completing the replacing construction of the cross arm. By adopting the construction method, a conducting wire to be replaced does not need to be arranged on the ground surface, thus completing the replacing of the normal linear rod cross arm for a 35kV line. The construction method is simple and feasible, the time for construction operation is shortened, the labor intensity of an operator is lightened, and the normal power supply of a spanned line is not affected simultaneously.

Description

technical field [0001] The invention relates to a maintenance and construction method for electric power transmission lines, in particular to a construction method for replacing a cross arm on a conventional straight pole of a 35kV line under tension. Background technique [0002] When the cross arm on the straight pole of the 35kV transmission line is corroded, the cross arm needs to be replaced in time. The current construction method is to cut off all the crossed transmission lines below the 35kV line to be replaced, then drop the conductors of the 35kV line to be replaced to the ground, so as to vacate the cross-arm, and then remove the old cross-arm and replace it with the new one. Cross arm replacement. After that, install and hook all the wires that have been placed on the ground on the new cross-arm, and complete the construction. This construction method has the following defects: 1. The labor intensity of the operators is high; 2. The construction time is long; 3....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/02
Inventor 王国骏宋燕伶赵强罗刚叶锋李银桥
Owner MIANYANG POWER SUPPLY COMPANY STATE GRID SICHUANELECTRIC POWER
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