750 kV wine glass composite cross arm tower

Abstract

The invention discloses a 750 kV wine glass composite cross arm tower. The 750 kV wine glass composite cross arm tower comprises two sets of side phase composite material cross arms, one set of middle phase composite material cross arms, one set of steel structure tower windows, two sets of steel structure ground wire supports and one set of steel structure tower bodies. The bottoms of the tower windows are fixed to the tops of the steel structure tower bodies. The two sets of side phase composite material cross arms are arranged on the two sides of the middles of the tower windows. The two sets of steel structure ground wire supports are arranged on the two sides of the tops of the tower windows. The middle phase composite material cross arms are arranged in the tower windows. The steel structure ground wire supports are connected with ground wires and angle steel of the tower windows. The angle steel of the tower windows are connected with tower body steel structures, ground connection downward leading is achieved, and the thunder prevention purpose is achieved. The purpose of tower head insulation is achieved by ensuring the effect that all the distances from wire hanging points to any metal piece meet the requirement of the insulation distance. All components form a space truss system so as to transmit loads. The creep distance of the cross arms is increased through umbrella skirts on the surfaces of the composite material components. Electric field distribution is improved through a grading and shielding ring.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of electric equipment, and relates to a structure of a power transmission pole and tower, in particular to a 750kV wine glass composite cross-arm tower. [0003] 【Background technique】 [0004] see figure 1 As shown, the current transmission tower structure mainly adopts an all-steel structure, which consumes a large amount of steel and mineral energy, causing serious pollution to the ecological environment. In addition, the line tower adopts an all-steel structure, which has problems such as heavy weight, difficulty in construction, transportation, and operation and maintenance. Therefore, the use of new tower materials has become a new trend in the field of transmission towers. [0005] Due to the advantages of high strength, light weight, corrosion resistance, easy processing, designability and good insulation performance, composite materials (FRP) have attracted more and more attention from the engineerin...

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Problems solved by technology

[0006] For composite material towers, previous research at home and abroad mainly focused on the "single-pole type". , the bearing capacity of a single-pole structure is difficult to meet the strength and stiffness requirements of high-voltage and heavy-load towers, so the composite material towers of high-voltage and ultra-high-voltage transmission lines should adopt the structural type of "construction"

[0007] For lattice-type composite pole towers, pilot applications have been carried out in the Ningdong-Shandong ±660kV DC transmission demonstration project and the 750kV Xinjiang-Northwest interconnection second channel project, and great economic benefits have been achieved. The structural type is not beautiful, and because the cross-arm is asymmetrical, the force is relatively unreasonable, and the cost is relatively high

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