Line windproof low-temperature-resistant telescopic spring, power transmission line and method

Abstract

The invention provides a line windproof low-temperature-resistant telescopic spring, a power transmission line and a method, the line windproof low-temperature-resistant telescopic spring comprises a first-layer elastic body and a second-layer elastic body, the first-layer elastic body is connected with the second-layer elastic body, and the thermal expansion coefficient of the first-layer elastic body is higher than that of the second-layer elastic body; the spring divided into the inner layer and the outer layer is made of two kinds of metal with different thermal expansion coefficients, the outer layer of the spring is large in thermal expansion coefficient, the inner layer of the spring is small in thermal expansion coefficient, the spring is large in elastic force and similar to a rigid body at normal temperature and high temperature, the length of a circuit cannot be prolonged at the high temperature, and the elastic force of the spring can be reduced in winter, especially in a low-temperature environment. In addition, thermal expansion and cold contraction of the line enable the line to generate large pulling force, so that the line is generally extended, and upward pulling of the line caused by lead shrinkage is avoided.

Description

technical field [0001] The invention belongs to the technical field of power transmission lines, and in particular relates to a line windproof and low temperature-resistant telescopic spring, a power transmission line and a method. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] With global warming, strong typhoons in summer and cold waves in winter caused by El Niño and La Niña phenomena are increasing day by day. For the sag of the line, it is proposed to meet the requirements of line shrinkage at the lowest temperature and the distance between lines at the strongest wind speed. At present, there are accidents where the wires are pulled up and the wires are discharged across the arms due to the shrinkage of the wires in severe cold weather. The current shrinkage of the wires due to cold is more common. Temporary reinforcement of the in...

AI Technical Summary

Problems solved by technology

At present, there are accidents where the wires are pulled up and the wires are discharged due to the shrinkage of the wires in severe cold weather. The current shrinkage of the wires due to cold is relatively common.

Temporary reinforcement of the insulators will cause the insulators and cross-arms to bear large structural forces, which may cause the tower to deform and collapse; the use of re-erecting the towers to shorten the distance between the towers will greatly increase the cost of line reconstruction; Larger line sag will lead to the probability of phase-to-phase short circuit in typhoon weather

The existing solution to anti-galling of lines is to install anti-galling devices, which cannot solve the problem of line shrinkage in winter

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