High-temperature-resistant halogen-free flame-retardant cable

Abstract

The invention belongs to the technical field of high-temperature-resistant halogen-free flame-retardant cables, and particularly relates to a high-temperature-resistant halogen-free flame-retardant cable. The cable comprises a core, the outer surface of the wire core is wrapped with a first insulating layer, and the first insulating layer is made of a halogen-free flame-retardant TPE material andis designed to be elastic. The outer surface of the first insulating layer is wrapped with an insulating inner tube, and the first insulating inner tube is made of a flame-retardant material and is designed to be elastic. According to the present invention, the high-temperature-resistant halogen-free flame-retardant cable is mainly used for solving the problems that the existing halogen-free flame-retardant cable material is added with organic phosphonate and/or a phosphorus-nitrogen intumescent flame-retardant system, so that the tensile strength and the elongation at break are greatly reduced; the existing halogen-free flame-retardant cable material still has the disadvantages of low flame-retardant grade and low temperature-resistant grade; and the flame-retardant cable in the prior arthas a certain flame-retardant effect, but is relatively single in structure, and when a fire occurs, the high temperature is resisted only by virtue of the flame-retardant effect of the cable, but the high-temperature incineration cannot be resisted for a long time, so that the cable is burnt and damaged.

Description

technical field [0001] The invention belongs to the technical field of high-temperature-resistant halogen-free flame-retardant cables, in particular to a high-temperature-resistant halogen-free flame-retardant cable. Background technique [0002] With the rapid development of the national economy, the amount and scope of use of wire and cable are increasing. In recent years, industries such as power plants, substations, smelting and petrochemical industries have a great demand for control cables. In use, it is necessary not only to avoid mechanical damage, insulation damage, insulation aging and deterioration of the control cable, but also to use it under high temperature conditions, that is, high temperature resistance. Especially for control cables used in environments such as anti-corrosion and high temperature resistance, and need to be able to prevent discharge damage between cable cores and between cables, and have high mechanical properties such as high tensile stren...

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Problems solved by technology

[0006] In order to make up for the deficiencies in the prior art, the present invention proposes a high-temperature-resistant halogen-free flame-retardant cable. or phosphorus-nitrogen intumescent flame-retardant system, resulting in a significant drop in tensile strength and elongation at break, and still has the disadvantages of low flame-retardant grades and low temperature-resistant grades. The flame-retardant cables themselves in the prior art have certain Inflammation effect, but the structure is relatively simple. In case of fire, only the flame retardant effect of the cable itself can resist high temperature, and it cannot resist high temperature burning for a long time, which will lead to the problem of cable damage

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