Cable with low-smoke and zero-halogen environmentally friendly layer

Abstract

The invention relates to the technical field of wires and cables, in particular to a cable with a low-smoke and zero-halogen environmentally friendly layer used on electric power engineering. The cable comprises an outer sheath layer, wherein three S-shaped interlocked armor layers are arranged in the outer sheath layer; a low-smoke and zero-halogen environmentally friendly sleeve is arranged in each S-shaped interlocked armor layer; a conductor is arranged in each of the three low-smoke and zero-halogen environmentally friendly sleeves; each conductor is formed by mutually stranding special-shaped single wires by pre-twisting forming; and a gap between the inside of each low-smoke and zero-halogen environmentally friendly sleeve and the corresponding conductor is filled with zero-halogen filling ropes. The cable with the low-smoke and zero-halogen environmentally friendly layer is simple in structure, simple to manufacture, practicable, and convenient to use, and has good fire-proof property, high-temperature resistance, low-smoke property, wear resistance and corrosion resistance.

Description

Technical field [0001] The invention relates to the technical field of wires and cables, in particular to a cable provided with a low-smoke, halogen-free environmental protection layer used in power engineering. Background technique [0002] In recent years, as people’s awareness of quality, environmental protection, low-carbon, and safety has become higher and higher, especially as global environmental problems have worsened, people have been forced to pay more and more attention to the research of environmental problems, and government departments have also There are regulations prohibiting the use of environmentally friendly cables in large and medium-sized buildings or public places. At present, China’s engineering projects and home wiring industries still use a large number of ordinary PVC materials, and competition is in full swing. This makes many domestic manufacturers use cutting corners to reduce costs. This makes the produced cables have great safety hazards, which wil...

AI Technical Summary

Problems solved by technology

In view of the above problems, most of the current industries use low-smoke and halogen-free materials instead, but the investigation of actual installation, laying and use shows that low-smoke and halogen-free materials have strong water absorption and poor wear resistance (mainly manifested in the process of pipe penetration, insulation layer is easy to be damaged), resulting in the insulation resistance being lower than the safety value after laying for a period of time or just after laying, and the safety is poor.

[0003] Most of the traditional power cables now use round single-wire stranded conductors. The filling factor of the stranded conductor is 0.75, and the filling factor reaches 0.82-0.92 after compaction. Therefore, the outer diameter of the conductor is too large, which increases the insulation, filling, The amount of armoring and sheathing materials increases the production cost and fails to achieve the purpose of environmental protection, while the ordinary armored cable sheath is made of PVC material, which contains halogen elements, and produces toxic gas when burned. The large amount of smoke and low light transmittance not only cause environmental pollution, but also restrict the rescue work at the fire scene

[0004] The current cables are used more and more widely, so that the cables will be applied in various complex environments, and the cables are required to have various resistance properties, but the fire performance of the cables is too poor now, and the material of the cable outer sheath directly affects The anti-corrosion characteristics of the cable, the difficulty of laying the cable, and affect the service life of the cable, which brings various inconveniences to the user; and people's environmental awareness is getting heavier, and the cable is required to be environmentally friendly and safe.

The existing environmental protection cable includes a conductor, an insulating layer made of polyvinyl chloride, a filling layer made of polyvinyl chloride and a protective layer made of polyvinyl chloride; the insulating layer wraps the conductor, the filling layer wraps the insulating layer, and the protective layer wraps the filling layer , the existing environmental protection cable is made of polyvinyl chloride, which contains a lot of halogen, and the combustion of the environmental protection cable will produce a large amount of hydrogen chloride, which is poisonous, which will harm the health of personnel and threaten their lives