A XLPE insulated DC cable for urban light rail subway

Abstract

The invention discloses a cross-linked polyethylene insulated direct current cable for urban light rail subway, comprising a copper conductor, a cross-linked polyethylene insulating layer, an intumescent water-blocking tape, an aluminum-plastic bonded comprehensive protective layer, a low-smoke halogen-free flame retardant inner a protective layer, an anti-mouse ant layer and an outer sheath; the cross-linked polyethylene insulating layer covers the copper conductor, the intumescent water-blocking tape covers the cross-linked polyethylene insulating layer, the aluminum The plastic-bonded comprehensive protective layer is extruded and wrapped around the intumescent water-blocking tape, and the low-smoke halogen-free flame-retardant inner protective layer is wrapped with an aluminum-plastic bonded comprehensive protective layer. The low-smoke halogen-free flame retardant inner protective layer is wrapped around layer by layer, and the outer sheath is extruded and wrapped around the anti-mouse and ant layer; the compound antioxidant can prevent or slow down the degradation of the cross-linked polyethylene insulating layer. The self-oxidation reaction rate can delay the aging and degradation of the cross-linked polyethylene insulating layer, effectively improve the service life of the product, and at the same time improve the mechanical and electrical properties of the product.

Description

technical field [0001] The invention belongs to the technical field of cables, and relates to a cross-linked polyethylene insulated direct current cable for urban light rail subways. Background technique [0002] With the development of urbanization, in order to facilitate people's travel, the subway has been constructed on a large scale in the city, and a large number of cables need to be used in the process of subway construction. The existing subway cables lack effective anti-oxidation protection when in use. , which makes the subway cable easy to age and damage during use, which leads to the problem of short service life of the subway cable, which greatly reduces the practicability of the subway cable. [0003] Moreover, the use environment of subway cables is mostly densely populated underground. Once a fire occurs, the underground closed environment will bring great difficulties to personnel escape and fire fighting work. At the same time, the smoke and toxic gas gene...

AI Technical Summary

Problems solved by technology

Therefore, for cables used in subway or rail transit, there are high requirements for waterproof, rodent and ant proof, flame retardant and smoke generation, and traditional cables cannot fully meet the needs of use

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