A kind of manufacturing method of fireproof cable for multifunctional rail transit

Abstract

The invention provides a manufacturing method of a fireproof cable for multifunctional rail transit, wherein the manufacturing method belongs to the technical field of wires and cables. The manufacturing method comprises a cable core manufacturing step, a cable core cabling step, and a step of combining a cable core with a housing. The cable core is obtained through cabling one functional cable or multiple functional cables. Each functional cable and / or housing at least comprises an alkali-free ceramic fiber yarn woven layer and a high-temperature-resistant nanometer coating which is arranged on the external surface of the alkali-free ceramic fiber yarn woven layer. The alkali-free ceramic fiber yarn woven layer and the high-temperature-resistant nanometer coating on the external surface form a flame-retardant protective tube. Electric conduction of the cable can be kept through function of the flame-retardant protective tube (with high temperature resistance, nonflammability and heat insulation). Signal connection can be kept by longer than three hours, thereby supplying reliable safe power, signal and the like for rescue. On the condition of the flame, the outer protective layer, the oxygen insulating layer and the insulating layer of the cable can be automatically solidified for protecting, thereby realizing fire resistance, water resistance, vibration resistance, no toxicity, environment-friendly performance, and high temperature resistance which reaches resistance to the higher temperature above 1000 DEG C. The manufacturing method can be simultaneously used in multiple fields.

Description

technical field [0001] The invention relates to the technical field of wires and cables, in particular to a method for manufacturing a multifunctional fireproof cable for rail transit. Background technique [0002] With the rapid development of my country's transportation industry, there are more and more transportation tools such as subways, light rails, and intercity railways that are convenient for people to travel. In urban rail transit lines, various cables are laid intricately, the wiring is relatively dense, and fires are prone to occur. Requirements are put forward for the safety performance of cables in case of fire. The general rules for flame-retardant and fire-resistant wires and cables GB / T19666-2005 require fire-resistant cables to maintain normal power supply for a period of time in a burning state to facilitate escape and rescue. [0003] Cable fire accident is one of the catastrophic accidents in power system. In recent years, the proportion of power syste...

AI Technical Summary

Problems solved by technology

In particular, due to the complex structure of the subway building and few entrances and exits, the scene environment is complex when a fire occurs, which also brings great difficulties to the rescue work, which requires a long period of time for the supply of on-site power lines

In addition, when a fire is extinguished at the scene, there is generally a large amount of water, and the cable is more likely to cause an accident under the action of alternating current and water. This is why the cable must also have a waterproof function.

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