Cable lead-down facility for built single-circuit tension tower

Abstract

The invention relates to a cable lead-down facility for a built single-circuit tension tower. The cable lead-down facility comprises an independent bearing table and a lead-down pole tower, wherein asupport platform is arranged at a top end of a support rod and comprises an X-shaped cross arm and a linear cross arm, the center of the X-shaped cross arm is arranged at the top of the support rod, an included angle of 45 degrees is formed between the X-shaped cross arm and a power transmission line direction, seat-type lightning arresters are arranged on the linear cross arm far away from the iron tower, seat-type cable terminals are arranged on the linear cross arm near to the iron tower, a rod body is near to the build tension tower, a plurality of layers of strut insulators are arranged at a part from a top end of the rod body to the independent bearing table at equal distance, each layer of strut insulators are arranged at two edges of a perpendicular circuit direction, and the strutinsulators are arranged at one edge of a horizontal circuit direction and derivate from the built tension tower. By the cable lead-down facility, the stress applied to the tension tower at a lead-down side is not changed, an old tower is prevented from being disassembled and rebuilt, and the construction cost is substantially reduced; with the adoption of a split structure of the independent bearing table and the lead-down pole tower, the influence on the built circuit is reduced; and meanwhile, by employing the independent bearing table, the position of the cable terminal is relatively low,and running and maintenance are facilitated.

Description

【Technical Field】 [0001] The invention relates to the technical field of high-voltage power transmission lines, in particular to a cable lead-down facility for a single-circuit tension tower that has been built. 【Background technique】 [0002] In the actual project of overhead transmission line cable lead, due to factors such as line path and surrounding environment, the cable lead point may appear in the center of the line, near the existing towers, etc., especially near the built tensile tower. The newly-built strain-resistant cable terminal tower and the built-in strain-resistant tower form a small isolated file, which increases the unbalanced tension on both sides of the built-in strain-resistant tower, which is difficult to meet the conditions of use and needs to be demolished and reconstructed; The towers are affected by the mutual influence of the poles and towers, and the distance between the two towers should not be too close, and the utilization rate of the newly built ...

AI Technical Summary

Problems solved by technology

[0002] In the actual project of cable lead-down of overhead transmission lines, due to the influence of line path, surrounding environment and other factors, the cable lead-down point may appear in the center of the line, near the built tower, etc., especially near the built tension tower. The new tension-type cable terminal tower and the built-up tension tower form a small isolated gap, which increases the unbalanced tension on both sides of the built-up tension tower, which is difficult to meet the use conditions and needs to be dismantled and rebuilt; the new linear cable terminal and the built-up The tower is affected by the mutual influence of the pole tower foundation, the distance between the two towers should not be too close, and the utilization rate of the newly built straight tower is not high, the waste of resources is serious, and the overall aesthetics is poor

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