High-flame-resistance environment-friendly refractory control cable for nuclear power station
A control cable, environmentally friendly technology, applied in the field of cables, can solve the problems of low flame retardant grade and no fire resistance
Active Publication Date: 2010-10-06
GOLD CUP ELECTRIC APP HENGYANG CABLES
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a high flame-retardant and environment-friendly fire-resistant control cable for nuclear power in view of the problems that the control cable for nuclear power has a low flame-retardant grade and generally does not have fire-resistant performance.
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[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0017] see figure 1 , each fire-resistant insulated wire core consists of a multi-core copper conductor 1, a synthetic mica refractory layer 2 wrapped around the multi-core copper conductor 1, and an inner and outer layer of cross-linked polyolefin extruded on the mica refractory layer 2 Insulation layers 3, 4 constitute.
[0018] The multi-core copper conductor 1 is a five-core copper conductor, which adopts a bundle-twisted circular stranding structure with a cross-section of 2.5mm 2 , Each core copper conductor is made of 49 annealed copper single wires twisted in the same bundle according to the arrangement of 4+9+15+21. The material of each annealed copper single wire is oxygen-free electrolytic copper, and the structure is: 49 / 0.25mm.
[0019] The synthetic mica refractory layer 2 is wrapped with synthetic mica tape, and the refractory ...
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Abstract
The invention relates to a high-flame-resistance environment-friendly refractory control cable for a nuclear power station. The cable comprises a refractory insulated cable core, an alkali-free glass tape layer covered on the refractory insulated cable core, and an environment-friendly oxygen barrier extruded on the alkali-free glass tape layer. The cable additionally comprises an outer sheath which is extruded on the environment-friendly oxygen barrier and is made of low-smoke halogen-free environment-friendly radiation-resistant cross-linked polyolefin material. The refractory insulated cable core is formed by a plurality of refractory insulated wire cores and an inorganic flame-resistant material rope filled in the center of the refractory insulated wire cores in a twisting way at certain twisting pitches. Each refractory insulated wire core is formed by a multi-core copper conductor, a synthetic mica refractory layer lapped outside the multi-core copper conductor, and cross-linked polyolefin insulating layers lapped on an inner layer and an outer layer on the synthetic mica refractory layer. The invention has the advantages that the cable can be used in K1-K3 places in the nuclear power station, and the requirements on use in severe environments such as high-temperature, high-humidity-and-heat, high-radiation, refractory, flame-resistance environments and the like can be satisfied.
Description
Technical field: [0001] The invention relates to a cable, in particular to a high flame-retardant and environment-friendly fire-resistant control cable for nuclear power. Background technique: [0002] The control and signal transmission of various instruments and meters inside the nuclear power plant have very high requirements on the reliability of the control cables. Due to the particularity of the internal environment of nuclear power plants, cables are required to withstand harsh environmental requirements such as high temperature, high humidity, radiation dose resistance, and flame retardancy. Traditional nuclear power control cables have low flame retardancy and generally do not have fire resistance. Invention content: [0003] The technical problem to be solved by the present invention is to provide a high flame-retardant and environment-friendly fire-resistant control cable for nuclear power in view of the problems that the control cable for nuclear power has a lo...
Claims
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Inventor 周祖勤陈善求黄海
Owner GOLD CUP ELECTRIC APP HENGYANG CABLES