Phase change temperature control type high-voltage cable

Abstract

The invention provides a phase change temperature control type high-voltage cable. The cable comprises a cable core wire, and an inner sheath, a braided layer and an outer sheath which sequentially coat the outside of the cable core wire, a filling layer is arranged between the cable core wire and the inner sheath, and the filling layer is an expanded graphite-high density polyethylene-paraffin composite phase change microcapsule. An expanded graphite-high density polyethylene-paraffin composite phase-change material, which is an organic composite phase-change material, is used as a filling material of the high-voltage cable, so that the transient temperature rise of the high-voltage cable is effectively reduced, the high-voltage cable is prevented from being locally overheated to cause thermal breakdown, and the service life of the high-voltage cable is prolonged; by use of the braided layer formed by interweaving the superconducting carbon fiber yarns and the outer sheath formed by interweaving the carbon fiber yarns and the copper fiber yarns, the heat dissipation effect is improved; loss of the solid-liquid phase change material is avoided through encapsulation of the filling material; and toxicity and corrosion of the phase change material are isolated through the coating effect.

Description

technical field [0001] The invention relates to the field of power cables, in particular to a phase-change temperature-controlled high-voltage cable. Background technique [0002] At present, with the rapid development of social economy, people's living standards are constantly improving, and the electricity consumption of Chinese residents is increasing day by day, which often makes the high-voltage cables used for power transmission heat up due to full load or overload operation, and long-term high temperature The operation will cause the insulation to drop and break down, and finally lead to the occurrence of cable fire. Therefore, it is necessary to take corresponding measures to prevent the high-voltage cable from overheating and prolong the service life of the high-voltage cable. The filling materials used in existing high-voltage cables are glass fiber, polyester fiber, cotton yarn and polypropylene rope, etc. The main function is to reduce the amount of rubber, reduc...

AI Technical Summary

Problems solved by technology

[0002] At present, with the rapid development of social economy, people's living standards are constantly improving, and the electricity consumption of Chinese residents is increasing day by day, which often makes the high-voltage cables used for power transmission heat up due to full load or overload operation, and long-term high temperature The operation will cause the insulation to drop and break down, and finally lead to the occurrence of cable fire, so it is necessary to take corresponding measures to prevent the high-voltage cable from overheating and prolong the service life of the high-voltage cable

The filling materials used in existing high-voltage cables are glass fiber, polyester fiber, cotton yarn and polypropylene rope, etc. The main function is to reduce the amount of rubber, reduce costs, and increase cable strength. However, the thermal resistance of the above-mentioned filling materials is high and the distribution is uneven. Even, it affects the heat transfer efficiency, which is not conducive to the heat dissipation and cooling of the cable conductor

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