Method for improving anti-corrosion capacity of grounding grid of transmission line tower

Abstract

The invention discloses a method for improving the anti-corrosion capacity of a grounding grid of a transmission line tower. According to the method, a small protective box (die) is produced for grounding wires at the ground surface layer through impermeable concrete, and then waterproof mortar with high anti-permeability capacity is spread on the surface layer. The protective box for the grounding wires should protrude the ground surface layer for an appropriate height and be embedded into the earth for a suitable depth, so that positions prone to corrosion of the grounding wires are isolated from moist soils and oxygen in the air, and the corrosion problem at the positions can be solved effectively. According to the method, safe operation of the grid can be guaranteed, the cost can be reduced, certain economic benefits can be improved, and the anti-corrosion capacity of the grounding grid can be improved so as to guarantee smooth discharge in thunderstorm season and avoid grid accidents.

Description

technical field [0001] The invention belongs to the technical field of poles and towers for power transmission, and relates to a grounding grid anticorrosion technology, in particular to a method for improving the anticorrosion ability of the grounding grid of transmission line poles and towers. Background technique [0002] In the prior art, there are mainly the following methods for improving the anti-corrosion ability of the transmission line tower grounding grid: [0003] 1. Overall replacement: The method of directly replacing the grounding grid is adopted. Although this method can improve the leakage rate of the grounding grid as a whole, due to the large amount of construction, it takes too long and consumes too much manpower, material and financial resources. [0004] 2. Replacement of grounding wires: This method is more convenient than the overall replacement of the grounding grid, but it is still more time-consuming and costly. If each base adopts such a treatmen...

AI Technical Summary

Problems solved by technology

[0003] 1. Overall replacement: The method of directly replacing the grounding grid is adopted. Although this method can improve the leakage rate of the grounding grid as a whole, due to the large amount of construction, it takes too long and consumes too much manpower, material resources and financial resources.

[0004] 2. Replacement of the grounding wire: This method is more convenient than the overall replacement of the grounding grid, but it is still more time-consuming and costly

[0005] 3. Use of resistance reducing agent: the use of resistance reducing agent can have a good effect on reducing the grounding grid, but because it contains highly conductive salt, it will often increase the corrosion of the grounding grid

[0006] 4. Use the hot-dip galvanizing method to protect the grounding grid: the effect of galvanizing is better, but it is expensive and the cost is high-equivalent to replacing the grounding grid

This method can play an anti-corrosion effect in a short period of time, but it is easy to fall off. To achieve long-term anti-corrosion purposes, it must be repeatedly applied frequently, and the workload is relatively large.

[0008] 6. Use pure copper material grounding grid instead of metal material grounding grid: pure copper material grounding grid replaces metal material grounding grid. Its leakage and corrosion resistance are the best among various ground grid materials, but it is expensive and will cause Serious soil heavy metal pollution, not conducive to environmental protection

[0009] Overhead power transmission lines are mostly located in high areas such as mountain tops and are as high as tens of meters or even hundreds of meters, so they are easily hit by lightning and cause atmospheric overvoltage, and are also prone to lightning strikes near the line or thundercloud effects in the distance The grounding network of the transmission line is responsible for the leakage of the current when the line is struck by lightning. If the current cannot be discharged smoothly, the line will trip and the power will be cut off or the electrical equipment will be burned, causing heavy losses to the power grid, people, and equipment.

Images