Double loop VIV (vortex induced vibration) string-drum-shaped tangent tower

Abstract

The invention provides a double loop VIV (vortex induced vibration) string-drum-shaped tangent tower which mainly comprises a tower body (11), a lead cross arm (12), a ground wire bracket (13) and tower legs (14) and is characterized in that the lead cross arm (12) comprises an upper-layer cross arm (121), a middle-layer cross arm (122) and a lower-layer cross arm (123); the upper-layer cross arm (121) and the lower-layer cross arm (123) adopt a V-shaped insulator string; and the middle-layer cross arm (122) adopts an I-shaped insulator string. At present, a three-phase I-string is larger in the gap between the upper and middle lead layers and not high in space utilization rate, and the corridor is larger in width, the occupied space is large, and the cost is high. The three-phase V has the highest tower head and the longest cross arm in the rod tower mode of the three layers of cross arms; the front inclined materials of the cross arm are all stressed material, therefore, the steel index is not economic; and a great number of insulators are consumed. The double loop string-drum-shaped tangent tower in mode of VIV string arrangement has more advantages in steel index conservation, tower head size reduction, corridor width optimization, line security assurance and other aspects.

Description

technical field [0001] The invention relates to the field of high-voltage technology, in particular to a double-circuit VIV series drum-shaped linear tower. Background technique [0002] The choice of tower type is an important issue for transmission lines. The optimization of tower head form and wire arrangement optimization not only has the advantages of reducing tower load, reducing gap size, reducing tower index, reducing line corridor and engineering investment, improving anti-ice overload capacity, suppressing wire galloping, and simplifying the design of fittings and insulator strings. , At the same time, it can also greatly reduce the resistance loss in the transmission process, reduce the loss of electric energy, achieve the purpose of energy saving, consumption reduction, and environmental protection, and has obvious economic and social benefits. The power grid is of great significance. Optimizing tower head size and wire layout has become an important means to r...

AI Technical Summary

Problems solved by technology

[0003] In the previous design of double-circuit power transmission projects, 3I and 3V tower head layouts are usually used. These two layouts have their own advantages and disadvantages. The distance between the upper and middle conductor layers of the three-phase "I" string is relatively large, and the space utilization rate is not good. High; and the width of the corridor is large, occupying a large space and high cost

Three-phase "V" In the three-story cross-arm tower type, the tower head is the highest, the cross-arm is the longest, and the oblique materials on the front of the cross-arm are all stress materials, and the steel index is uneconomical; and the insulators are expensive.

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