Three-loop iron tower of power transmission line

Abstract

The invention discloses a three-loop iron tower of a power transmission line. The three-loop iron tower comprises a tower body as well as three layers of horizontal trusses, wherein two tower columns are arranged at the top of the tower body at intervals in parallel; the tower columns are arranged in the length direction of the tower body; the horizontal trusses comprise two large trapezoids as well as a small trapezoid, wherein the two large trapezoids take the tower columns as a center; the bottom sides of the two large trapezoids are connected between the two tower columns; the small trapezoid takes the bottom sides of the two large trapezoids between the two tower columns as the bottom; the upper bottom of the small trapezoid is supported on the waists of the two large trapezoid; lead suspending points are arranged on the lower bottom angles on the lower bottom corners, outside the two tower columns, of the two large trapezoids; another lead suspending point is also arranged at a public lower bottom corner where the two large trapezoids join each other. According to the three-loop iron tower, the three layers of the horizontal trusses are arranged on the head of the tower to bear the load of a lead, and the load of the horizontal trusses is conducted to truss columns on two sides of the tower head in symmetry and is further conducted to the tower body through the reasonably arranged truss structure, so that the rigidity mutation of the tower body is avoided; the three-loop iron tower is simple and definite in mechanical structure and simple in structure.

Description

technical field [0001] The invention relates to an iron tower, in particular to a three-circuit iron tower of a power transmission line. Background technique [0002] With the development of the economy, it is possible to use multi-circuit towers in areas where the resources of transmission line corridors are tight, which can greatly save line corridor resources. Among them, the double-circuit and four-circuit multi-circuit towers are better designed and more common, and the drum-shaped vertical arrangement is adopted. Due to the particularity of the three-circuit, there is no better dedicated three-circuit tower. If you encounter a corridor that needs to use three-circuit lines, generally use three single-circuit or one single-circuit and one double-circuit lines, and another is to use a double-circuit line with a single-circuit tower on top. Wherein the first kind of scheme occupies corridor wide, and investment is big. The latter scheme has a higher tower head, and the...

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Problems solved by technology

The latter scheme has a higher tower head, and the lightning protection effect of the tower is poor; the maintenance of the upper and lower circuits will be affected, and a power outage is required

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