Refrigeration cable applicable for power transmission line

Abstract

The invention discloses a refrigeration cable applicable for a power transmission line. The refrigeration cable comprises an outer protective jacket, a packing layer positioned inside the outer protective jacket, and a positive power transmission line core conductor, a negative power transmission line core conductor, a ground line conductor, a first insulating protective layer coated on the positive power transmission line core conductor, a second insulating protective layer coated on the negative power transmission line core conductor and a ground line insulating protective layer coated on the ground line conductor which are arranged inside the outer protective jacket respectively. The refrigeration cable also comprises first passages formed between the first insulating protective layer and the positive power transmission line core conductor respectively and second passages formed between the second insulating protective layer and the negative power transmission line core conductor respectively which are used for circulating a coolant, and first coolant guide pipes and second coolant guide pipes which communicate with the first passages and the second passages respectively. The cable disclosed by the invention can avoid the occurrence of hazardous conditions such as short circuits while realizing efficient cooling.

Description

technical field [0001] The invention belongs to the field of cables, in particular to cables for power transmission lines, in particular to a refrigeration cable suitable for power transmission lines. Background technique [0002] At present, cables containing power transmission lines are generally used in high-current and high-power equipment such as industrial appliances, motors, electric welding machines, machine tools, and industrial fans. Heat and temperature, and higher temperature will not only melt the insulation or sheath of the cable, but also accelerate the aging of the cable insulation or sheath, so that the insulation or sheath loses its original electrical and mechanical properties, thus losing its resistance to the cable. protective effect. Therefore, it is impossible for ordinary cables to operate at higher temperatures for a long time. [0003] Based on this, those skilled in the art have proposed cables with self-refrigeration. The refrigeration in the pr...

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Problems solved by technology

[0003] Based on this, those skilled in the art have proposed cables with self-refrigeration. The refrigeration in the prior art uses cooling fluid to cool the cables. However, for cables suitable for power transmission lines, there are more or less the following: Problems: 1. The refrigeration effect is not satisfactory; 2. Since the cable routing is always bent, there is a situation where the insulation protection layer is crushed by the high pressure of the cold fluid and a short circuit occurs, etc. Therefore, those skilled in the art It is urgent to find a cable that has the advantages of excellent cooling effect, avoiding short circuit and other dangerous situations, and is suitable for power transmission lines

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