A connection structure of interphase spacer rods for transmission lines

Abstract

The invention belonging to the field of power grid equipment tools more particularly relates to a connection structure of alternate spacer bars of power transmission lines. When power transmission lines swing, connection structures at the other sides move to opposite directions successively based on inertia forces of alternate spacer bars and of other structures; and the larger the swinging amplitudes, the larger inertia forces and elastic forces, so that the moving speeds and angles of other connected connecting elements are increased. Therefore, great changing of the spacing distance of power transmission lines during instantaneous swinging is prevented. Wire clamps with horn mouths are arranged at two sides of a horizontal side; and when cables of a T-shaped connecting element dislocate and move along the power transmission line direction, resistances are generated between the cables at the upper end and the lower end of the T-shaped connecting element to prevent continuous dislocation, wherein the resistances are applied to the wire clamps and the T-shaped connecting element directly and then are applied to the cable at the other end indirectly. The horn mouths at the end portions of the wire clamps provide turning radian shapes when inclination occurs, so that a phenomenon that the cables are damaged when being cut by the wire clamps is avoided.

Description

technical field [0001] The invention belongs to the field of power grid equipment tools, in particular to a connection structure for interphase spacer rods of transmission lines. Background technique [0002] Phase spacers are a common tool used to suppress cable galloping in grid transmission lines. Transmission line galloping refers to the complex vibration or jump of the transmission cable due to various external or self-causes. It is as large as the large amplitude jump caused by the ice falling off the cable from a large area at the same time after the ice and snow weather, and as small as the temperature change line. The tension and deformation between cables caused by thermal expansion and contraction of cables, etc. These vibrations or deformations are difficult to accurately predict in advance. As a result, the preset insulation distance between cables will change and cause a short circuit, affecting the normal operation of the power grid. The distance between the ...

AI Technical Summary

Problems solved by technology

Transmission line galloping refers to the complex vibration or jump of the transmission cable due to various external or self-causes. It is as large as the large amplitude jump caused by the ice falling off the cable from a large area at the same time after the ice and snow weather, and as small as the temperature change line. The pulling and deformation of the cables caused by the thermal expansion and contraction of the cables, etc. These vibrations or deformations are difficult to accurately predict in advance. As a result, the preset insulation distance between the cables will change and cause a short circuit, which will affect the normal operation of the power grid.

The distance between the transmission lines is controlled by the interphase spacer, which effectively suppresses the occurrence of the above problems. The interphase spacer is fixed on the grid transmission line through the connector, but in the long-term use process, the connector exposes some problems, sometimes even It will affect the normal operation of the transmission network

One is that the design of the connection structure makes it easy to wear and tear during long-term use, and has an adverse effect on the structure of the cable. The most common ones are damage, wear, corrosion of the connection part, and fracture of the cable caused by friction or shearing of the connection; The second is that the connection structure is unstable, and the relative position between the cables cannot be guaranteed, resulting in failure of single-phase intervals, and even mutual influence, resulting in collective failure

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