Multilayer segmented conductor type water-blocking power cable with built-in cable

Abstract

The invention discloses a multilayer segmented conductor type water-blocking power cable with a built-in cable. The center of the cable is equipped with a segmented conductor layer. The segmented conductor layer is formed by assembling a plurality of segmented fan-shaped conductor strand blocks and a fan-shaped strand block water-blocking layer arranged out of each segmented fan-shaped conductor strand block. A water-blocking rope is filled in a center gap after the plurality of fan-shaped strand block water-blocking layers are assembled. A round conductor is arranged in each fan-shaped conductor strand block. A round water-blocking layer is arranged out of each round conductor. Water-blocking blocks are filled in the gaps among the fan-shaped strand block water-blocking layers, a water-blocking tape and silk thread bundles. A polyethylene insulating layer, a vertical structure water-blocking layer, a metal armored layer and an alkali-free glass optical fiber tape are extruded out of the segmented conductor layer in sequence. According to the cable, the conductor water-blocking structure and the external water-blocking structure are combined mutually, the conductor is not oxidized and corroded due to water immersion, the electric performance of the cable is prevented from being influenced and an abnormal cable breakage event is prevented from occurring.

Description

Technical field [0001] The invention relates to the field of cables, in particular to a multi-layer split conductor water-blocking power cable with built-in optical fibers. Background technique [0002] With the rapid growth of China's economy and the further acceleration of industrialization and urbanization, the requirements for the construction of urban power grids and other infrastructure are increasing. Cities in developed regions and provincial capitals have demanded the use of underground power cables to transmit electricity in urban centers. At the same time, electricity is the prerequisite and foundation for the development of the national economy. With the rapid development of the national economy, the demand for electricity has increased sharply, the capacity of the grid has increased, and the power of the motor has increased. The power facilities are moving towards large capacity (high voltage, large current, high frequency). ) Development of transmission direction. ...

AI Technical Summary

Problems solved by technology

The way of water intrusion is mainly from the sheath of the cable and the end of the cable into the inner conductor of the cable, causing oxidation and corrosion of the conductor, thereby affecting the electrical performance of the cable, and even causing abnormal disconnection accidents; Under the action of the electric field, the insulating layer will produce "water branches", which will accelerate the electrical aging of the cable, cause cable breakdown accidents, and reduce the service life of the cable

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