A low-skin-effect large-diameter cable

Abstract

The invention relates to a low-skin-effect large-wire-diameter cable which is composed of a cable core and an insulating layer. The insulating layer wraps the outer surface of the cable core. An elastic buffering layer is arranged between the insulating layer and the cable core. The outer surface of the cable core is evenly provided with T-shaped heat dissipation grooves. The center of the interior of the cable core is provided with a reinforcing hole with the section being circular. At least two layers of load reducing holes are formed in an annular mode with the circle center of the reinforcing hole as the center. The load reducing holes are further internally provided with insulating ceramic powder. The reinforcing hole is internally provided with an elastic tensile belt. The reinforcing hole and the load reducing holes, the load reducing holes and the load reducing holes, the load reducing holes and the surface of the cable core and the groove wall thickness of the T-shaped heat dissipation grooves keep consistent. The insulating layer is further internally and evenly provided with at least two load reducing holes. The low-skin-effect large-wire-diameter cable has the advantages that the cable is light in weight, good in heat resistance and heat dissipation performance, high in tensile performance, low in drooping degree, low in heat expansion coefficient and high in overflow bearing capacity, and the skin effect is lowered obviously, so that the skin effect easily occurring in the large-section power cable core is effectively lowered, and the bearing capacity and operation efficiency of the power cable are improved.

Description

technical field [0001] The invention relates to a power cable, in particular to a low-skin-effect large-diameter cable, which belongs to the field of electric power. Background technique [0002] With the continuous improvement of power users' demand for electric energy, various electrical appliances with large power consumption have been widely used. Because the electrical appliances with large power consumption are working, it is often required that the transmission cables that increase the power for them need to have relatively Large overcurrent capacity and carrying capacity, so the current usual treatment method is to increase the diameter of the power supply cable to meet the needs of use, but with the increase of the cable diameter, it also results in higher cost and greater weight of the cable And the cable itself is prone to skin effect, which leads to the high cost of erection and use of this type of cable, and the limited power supply efficiency cannot effectively...

AI Technical Summary

Problems solved by technology

[0002] With the continuous improvement of power users' demand for electric energy, various electrical appliances with large power consumption have been widely used. Because the electrical appliances with large power consumption are working, it is often required that the transmission cables that increase the power for them need to have relatively Large overcurrent capacity and carrying capacity, so the current usual treatment method is to increase the diameter of the power supply cable to meet the needs of use, but with the increase of the cable diameter, it also results in higher cost and greater weight of the cable And the cable itself is prone to skin effect, which leads to the high cost of erection and use of this type of cable, and the limited power supply efficiency cannot effectively meet the needs of power users. At the same time, in the long-distance power line suspension erection, traditional Due to the material of the cable itself, its anti-sagging performance is poor, its coefficient of thermal expansion and contraction is also high, and its own corrosion resistance is relatively poor, so it has caused great difficulties for electric power construction and daily maintenance. Therefore, it is urgent to develop a A new type of cable to meet the needs of practical use

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