Heat-resistant aluminum alloy wire for power transmission

The utility model discloses a heat-resistant aluminum alloy wire for power transmission. The heat-resistant aluminum alloy wire comprises a steel core, a first aluminum alloy layer, a second aluminum alloy layer and a third aluminum alloy layer. The outer surfaces of a first steel wire and a second steel wire are respectively coated with an aluminum layer. The first aluminum alloy layer is formed by stranding 8-10 first aluminum alloy guide wires. The second aluminum alloy layer is formed by stranding 14-16 second aluminum alloy guide wires. The third aluminum alloy layer is formed by stranding 20-22 third aluminum alloy guide wires. The ratio of the diameter of the first steel wire to the thickness of the aluminum layer thereof and the ratio of the second steel wire to the thickness of the aluminum layer thereof are 10:2-4. The diameters of the first steel wire and the second steel wire are smaller than the diameters of the first aluminum alloy guide wires, the second aluminum alloy guide wires and the third aluminum alloy guide wires. The heat-resistant aluminum alloy wire for power transmission has excellent corrosion resistance and is light in weight, the capacity increase and the current carrying capacity are further improved, the transmission attenuation of cables is reduced, the tower is basically not changed on the original corridor, the capacity increase is more than 50%, and the service life of lines is prolonged.