A kind of insulated cable and its preparation method

Abstract

The invention discloses a cable insulating material and a preparation method thereof, and belongs to the field of cables. The cable insulating material comprises an outer sheath, an inner sheath and awrapping layer which are sequentially arranged from outside to inside, wherein a plurality of conductors are arranged in the wrapping layer; the plurality of conductors are annularly distributed in the wrapping layer; the outer end of each conductor is wrapped by an insulating layer; filling strips are arranged among the plurality of insulating layers; gaps among the filling strips are uniformlyfilled with powder which is solidified when meeting water; the powder can be hydraulic sulphoaluminate cement; the outer sheath is connected with a plurality of outer heat conduction blocks which areuniformly distributed; the inner sheath is connected with a plurality of inner heat conduction blocks with the same number as the outer heat conduction blocks; the cable is filled with the powder which is solidified when meeting water, when the cable is bitten by mice, insects, ants and the like to be damaged, water enters the cable, the powder is solidified when meeting water, water can be effectively prevented from entering the cable, the cable can be effectively prevented from being damaged again by mice, insects and ants, and therefore the insulating performance of the cable is not prone to being affected.

Description

technical field [0001] The invention relates to the field of cables, and more specifically relates to an insulated cable and a preparation method thereof. Background technique [0002] Wires and cables are used to transmit electric (magnetic) energy, information and wire products that realize the conversion of electromagnetic energy. In a broad sense, wires and cables are also referred to as cables for short. In a narrow sense, cables refer to insulated cables, which can be defined as: a collection composed of the following parts ; One or more insulated wire cores, and their respective possible covering layers, total protective layer and outer sheath, and the cable may also have additional uninsulated conductors. Unlike elevated high-voltage lines, cables are often laid in cable trenches, tunnels, pipelines or indoors. After entering the modern society, due to the shortage of urban land, heavy traffic pressure, city appearance construction and other reasons, large cities ge...

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Problems solved by technology

[0004] However, cables buried in the ground are vulnerable to gnawing by mice, insects, etc. Once the cable is gnawed and damaged, the insulation performance of the cable will be affected after water enters the interior, and the cable is prone to "water damage" under the action of the electromagnetic field. Tree aging” phenomenon, cable damage is only a matter of time, eventually leading to cable breakdown

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