A power line cable shock absorber, UHV transmission network

Abstract

A power line cable shock absorber, comprising an outer ball (1) and an inner ball (2); the outer ball is a hollow ball; the inner wall of the outer ball has at least two air cavities, and the inner side of the air cavity has an elastic membrane; the outer ball ( 1) There are air holes on the outer wall, the inner end of the air hole communicates with the air cavity, and the outer end of the air hole communicates with the atmosphere; the left side of the outer ball (1) has a threading hole (1‑2), and the right side of the outer ball (1) has a sliding hole The hole (1‑1), the threading hole (1‑2), and the sliding hole (1‑1) are coaxial; the left end of the threading hole (1‑2) is connected to the atmosphere, and the right end of the threading hole (1‑2) is connected to the sliding hole (1‑1) communicate; the inner ball (2) is made of hard material; the inner ball (2) has a threading channel (2‑1), the axis of the threading channel (2‑1) and the axis of the inner ball (2) coincide. The UHV transmission network is characterized in that: the shock absorber for a power line cable mentioned above is used for shock absorption. The invention has stable effect, long service life, low cost and energy saving, and provides a new technical idea.

Description

technical field [0001] The invention relates to the field of cable damping, in particular to a power line cable damper and an extra-high voltage transmission network. Background technique [0002] Cables are usually composed of several wires, which are an important part of the power transmission process and a guarantee for stable and reliable power transmission. The cable is pulled by the tension towers on both sides, and is easily damaged or even torn off by various external forces such as wind, rain and hail during the working process, which seriously interferes with normal power transmission. [0003] The patent application number developed by the Chinese company "State Grid Sichuan Provincial Electric Power Company Mianyang Power Supply Company" is: CN201910917269.9 The name of the invention is: A transmission line cable shock absorber and its installation method (hereinafter referred to as prior art A) [0004] Prior art A provides an ingenious solution. When the cable...

AI Technical Summary

Problems solved by technology

[0006] Technical defect 1. Prior art A relies on frictional heat to convert the kinetic energy of the cable into internal energy to reduce the kinetic energy of the cable. The friction surface of the inner and outer spheres will become smooth after a little longer friction time, and the friction effect is reduced, which is prone to the problem of technical effect decline , that is to say, there is an unstable protective effect in prior art A

[0007] Technical defect 2. The inner and outer spheres of the prior art A rely on friction to convert energy. If lubricated, the friction effect will be reduced easily. If no lubrication is performed, the inner and outer spheres will be easily worn. Therefore, the prior art A has the energy of the shock absorber. The conversion effect and the life of the shock absorber cannot be improved at the same time, so the prior art A has the technical defect that the protection effect and the life are not compatible

[0008] Technical defect 3. The spring in the prior art A is located between the inner and outer spheres. When the inner and outer spheres rotate relative to each other, the spring is prone to offset. After long-term wear of the inner and outer spheres, the spring can be stuck in the gap between the outer and inner spheres, causing the inner and outer spheres The movement of is hindered, resulting in a reduction in the energy conversion effect, so there is a situation in the prior art A that the protection effect decreases rapidly

[0009] Technical defect 4. The spring of the prior art A is located between the inner and outer spheres, the spring assembly is difficult and the production cost is high

[0010] Technical defect 5. The installation method of the prior art A requires the cable to form an inductance in the cable connection circle. When used for DC transmission, the inductance will generate magnetic field loss. When used for AC transmission, the inductance will generate radio wave release loss. Therefore, prior art A has the technical defect of wasting electric energy

[0011] Technical defect 6. The heat generated by the friction between the inner and outer balls in the prior art A can easily lead to expansion of the inner and outer balls, resulting in changes in the coordination of the inner and outer balls, which will lead to changes and fluctuations in the heat energy conversion effect, and there is a technical defect that the protection effect is unstable

[0012] In summary, prior art A has technical defects such as unstable protection effect, incompatibility between protection effect and service life, high production cost, and waste of energy, and there is room for improvement.

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