Crane cable for high-building

Abstract

An improvement of three cores high voltage lifting cable of high-rise building is adopting single core insulating cables and between them filled by three carrying steel cores with insulating coat of arc sector section. They cross into cable and outside is pricked by high-intensity strap. The arc sector bearing touches with closed cable core with large acreage and this enhances the friction of them greatly. For the crossing and strap, it increases the friction between them and greatly enhances the whole tensile strength of cable to endure more strength and is suit for lifting 150 meters or higher construction. It also increases current capacity of cable about 10-30% and reduces the weight of cable about 20-30% to cut down the cost. The arc sector bearing gives more little side pressure to cable and the cable is safe with good reliability. The absolute structure of three cores bearing reduces the difficulty of production.

Description

technical field [0001] The invention is an improvement to the hoisting cables used in high-rise buildings. Background technique [0002] With the construction of urbanization, there are more and more high-rise buildings, many of which exceed the height of 200 meters. At the same time, high-rise buildings have a high volume ratio, a large power consumption, and a large transmission power. In particular, large-capacity high-voltage cables are required. The backbone cables in high-rise buildings are laid vertically, so the cables usually weigh 5 to 8 tons, which requires the cables to have high tensile strength. In the existing steel wire armored cable, the steel wire armor is arranged on the outer periphery of the inner cushion layer after three cable cores are twisted into a cable, so that the cable can bear the longitudinal tension. The structure of the cable, first, the weight of the cable is heavy; second, it is difficult to fix the outer peripheral steel wire, and the co...

AI Technical Summary

Problems solved by technology

The insulated stranded steel wire used in the cable with this structure has a circular structure, the contact area and friction between the cable core and the cable core are small, and the outer sheath has a small holding force, the cable integrity is poor, and the tensile strength cannot meet 150 meters or more. Vertical hanging laying requirements for high-rise buildings; secondly, the circular steel core exerts a large lateral pressure on the cable core, which will adversely affect the stability and reliability of the cable; Resulting in a reduction in the ampacity of the cable

[0006] Therefore, the existing steel wire wrapped or extruded insulating steel wire circular structure is laid longitudinally and parallel, and the vertical tension is small, and cannot bear up to 4 tons or more. Hanging laying, and poor heat dissipation of the cable, resulting in reduced ampacity and increased cable cost

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