Insulation low-voltage power cable

Abstract

The invention discloses an insulation low-voltage power cable. The insulation low-voltage power cable comprises a solid aluminum conductor, wherein the solid aluminum conductor is arranged at the center of the cable, two semi-circular first solid aluminum lines with same shape structures are transversely extruded outside the solid aluminum conductor, two semi-circular second solid aluminum lines with same shape structures are longitudinally extruded, a low-density polyethylene insulation layer wraps the second aluminum lines in an extruded manner, dual layers of water blocking tapes wraps in a lamination way, a corrugated aluminum sheath is welded outside the water blocking tapes, asphalt is coated on the corrugated aluminum sheath, and finally, a middle-density polyethylene sheath is extruded at the outermost layer of the cable. The insulation low-voltage power cable has the characteristics of good water resistant performance, corrosion resistance, oxidation resistance, good heat resistance, no mechanical damage and the like.

Description

technical field [0001] The invention relates to the field of cables, in particular to an insulated low-voltage power cable. Background technique [0002] With the soaring price of copper, the price difference between copper and aluminum is getting bigger and bigger, and the power industry has begun to pay attention to the use of aluminum conductors. The current general situation in my country's cable industry is only 5 ~ 16 mm 2 Conductor adopts solid conductor, while 25 mm 2 The above uses stranded conductors. In the traditional manufacturing process of aluminum core conductors, aluminum ingots need to be drawn into aluminum rods, and the aluminum rods are drawn into aluminum single wires through a wire drawing process. To reduce the gap between the conductor single wires and improve the water resistance performance, the conductor often needs to be pressed tightly. This stranded conductor has the following obvious defects: (1) Aluminum is easy to oxidize, which reduces ...

AI Technical Summary

Problems solved by technology

This stranded conductor has the following obvious defects: (1) Aluminum is easy to oxidize, which reduces the performance of the conductor and affects the service life. The aluminum single wire and the cumbersome processing process increase the contact surface and degree of contact with air and mechanical oil, so Easy to oxidize; (2) The process is complicated, the processing process is cumbersome, there are many equipments, it takes up a lot of production and storage space, the production organization is difficult, the production efficiency is low, the energy consumption is high, and the labor cost is high, which increases the risk of logistics loss and quality control; (3) The increase in the processing process will easily cause mechanical damage to the surface, which will cause surface discharge. Repeated processing will also increase the thermal stress of the conductor, making the conductor hard and reducing the conductivity of the conductor; (4) Stranded conductor The gap between them is large, and the water resistance performance is reduced; (5) The outer diameter of conductors and cables is increased, occupying the laying space

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