Smokeless flame-retardant high-temperature-resistant power cable

Abstract

The invention provides a smokeless flame-retardant high-temperature-resistant power cable. Each insulation wire core is formed by a conductor, an inner insulation layer and an outer insulation layer, wherein the conductor is wrapped by the inner insulation layer and the outer insulation layer sequentially. The smokeless flame-retardant high-temperature-resistant power cable is characterized in that a glass fiber layer is arranged outside each outer insulation layer, an insulation wire core is formed by one conductor, one inner insulation layer, one outer insulation layer and one glass fiber layer, a plurality of insulation wire cores are twisted to form one cable core, gaps of the cable core are filled with filling strips, and the cable core and the filling strips are wrapped by isolation layers. The outermost layer of the cable is an outer sheath, and the inner insulation layers are made of insulation materials of polyethylene or cross-linked polyethylene or irradiation cross-linked polyolefin. The inner insulation layers are formed by fire-resistant mica tape and a nano fireproof insulation layer.

Description

technical field [0001] The invention relates to a cable, in particular to a smokeless, flame retardant and high temperature resistant power cable. Background technique [0002] With the rapid development of my country's industry, the scope and amount of plastic insulated cables in the industry are increasing. Ordinary plastic insulated cables have poor flame retardancy. After adding flame retardants, the electrical insulation is reduced, and a large amount of toxic and harmful smoke is produced when burning. , It is extremely harmful to the environment, equipment and personnel's life. The nano-fireproof material can be overloaded by 2.5 times under the rated voltage and can still play the role of insulation; the long-term working temperature range is: -40°C to 1200°C, as usual insulation; Short circuit, no electric fire; low smoke, non-toxic, halogen-free, flame retardant; low cost, good performance; suitable for insulating layers of various wires and cables. In view of the...

AI Technical Summary

Problems solved by technology

[0003] Traditional halogen-free flame-retardant cable materials are mainly flame-retardant by adding magnesium hydroxide and aluminum hydroxide to polyolefin materials, but their flame-retardant efficiency is low, and 50-60% needs to be added to achieve a certain flame-retardant effect , which makes the mechanical properties of the composite material deteriorate to a great extent, and the processing flow performance is further reduced

Chinese Patent Publication No.: CN 102140192A In the low-smoke halogen-free polyolefin composite material and its preparation method, in order to reduce the content of inorganic flame retardants and ensure the high flame retardant performance of the composite material, magnesium hydroxide is used as the main flame retardant Adding silicone as a flame retardant synergist, although the tensile strength of the prepared composite material is very high, the elongation at break is very short, only a few tens, while the polyolefin cable material standard clearly states that the elongation at break should be greater than 150%

[0005] Low-smoke, halogen-free, flame-retardant cables are basically insulated with low-smoke, halogen-free, and flame-retardant polyolefins, and the sheath is made of low-smoke, halogen-free, and flame-retardant polyolefin sheaths. However, cables made of such materials cannot achieve smoke-free, halogen-free, and non-combustible properties. Require