Civil multi-layer protection type fireproof cable

Abstract

The invention relates to the technical field of electric wires and cables, and relates to a civil multi-layer protection type fireproof cable applied to electric power projects. The fireproof cable comprises an outer sheath layer. Three S-shaped interlocking armor layers are arranged in the outer sheath layer. Three low-smoke and halogen-free environment-friendly sleeves are arranged inside the three S-shaped interlocking armor layers. A conductor is arranged inside the three low-smoke and halogen-free environment-friendly sleeves. Special-shaped single wires are pre-twisted and molded to be mutually twisted so as to form the conductor. Inside the low-smoke and halogen-free environment-friendly sleeves, gaps among the low-smoke and halogen-free environment-friendly sleeves and the conductor are filled with halogen-free filling ropes. The fireproof cable is environment-friendly, simple in equipment structure, simple and practicable to manufacture, convenient to use, fireproof, high-temperature-resistant, low-smoke, wear-resistant and corrosion-resistant.

Description

technical field [0001] The invention relates to the technical field of electric wires and cables, in particular to a civilian multi-layer protective fire-resistant cable used in electric power engineering. Background technique [0002] In recent years, as citizens have become more and more aware of quality, environmental protection, low-carbon, and safety, especially with the deteriorating global environmental issues, people have been forced to pay more and more attention to environmental issues. At the same time, government departments are also paying attention to It is prohibited to use environmentally friendly cables in large and medium-sized buildings or public places. At present, my country's engineering projects and home wiring industry still use a large number of ordinary PVC materials, and the competition is in full swing. This makes many domestic manufacturers use cut corners to reduce costs. There is a great potential safety hazard in the cables produced, which will ...

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