POWER CABLE WITH EXTRUDED CONDUCTIVE CONDUCTORS (OPTIONS) AND METHOD FOR ITS PRODUCTION Russian patent published in 2021 - IPC B21C23/08 C22C21/00 H01B1/02 H01B7/17 H01B9/00 

FIELD: cable technology.

SUBSTANCE: inventions relates to cable technology, namely to a method for manufacturing and structures of power cables with extruded conductive conductors, covered with an insulation layer and a sheath, intended for the transmission and distribution of electrical energy in stationary electrical installations with alternating voltage up to 1000 V and a frequency of up to 100 Hz. The method includes manufacturing a wire rod from an aluminum alloy, manufacturing a wire from a wire rod, manufacturing at least one conductive core from the obtained wire by applying an insulation layer followed by applying an outer sheath. Wire rod is made by continuous casting and rolling of an aluminum alloy containing in wt.%: iron (Fe) up to 0.65, zinc (Zn) no more than 0.04, silicon (Si) no more than 0.07, gallium (Ga) no more than 0.02, copper (Cu) no more than 0.01, magnesium (Mg) no more than 0.02, the rest - aluminum (Al) up to 99.00 and impurities. Casting of an aluminum alloy billet is carried out at a temperature of 840-900°С. Subsequent hot rolling is carried out at a temperature of 400-450°C to obtain wire rod, which is subjected to annealing in chamber furnaces at a temperature of 350-450°C with a cooling rate of no more than 30°C/hour. The wire is manufactured by the method of continuous extrusion of the resulting wire rod, providing heating to a temperature of 200-300°C due to internal combustion of an aluminum alloy without external heat sources during extrusion on an extrusion machine. The manufactured power cable contains at least one conductive core made of an extruded aluminum alloy without porosity, inclusions and local deviations in size, covered with an insulation layer and an outer sheath, having a cross-sectional area from 1 to 1000 mm² and withstanding at least 27 bends at an angle of 90° from the starting position in both directions.

EFFECT: improvement of a method for manufacturing and structures of power cables with extruded conductive conductors.

24 cl, 2 dwg, 1 tbl, 1 ex