Flexible cable for intrinsic safety DCS
A DCS system and flexible cable technology, applied in the direction of insulated cables, bendable cables, cables, etc., can solve the problems of explosive gas explosion, poor cable shielding effect, etc. Effect
Inactive Publication Date: 2014-12-24
扬州市金阳光电缆有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to provide an intrinsically safe DCS system with the characteristics of low dielectric loss and strong signal transmission for the problems of poor cable shielding effect, explosive gas explosion caused by electric sparks and thermal effects, and cable self-capacitance and distributed inductance. with flexible cable
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[0007] like figure 1 As shown, the present invention includes a cable core, and a wrapping cable layer 1, a total shielding layer 2, an inner liner 3, an armor layer 4 and an outer sheath layer 5 are arranged successively outside the cable core; A filling layer 6 is arranged between the cable layers 1; a first drain wire 7 is arranged between the wrapping cable layer 1 and the total shielding layer 2; the cable core includes several strands of twisted wire cores 8, and each wire core 8 is respectively It includes a pair of twisted insulated conductors 9, and a ribbon layer 10, a tape layer 11 and a phase-separated shielding layer 12 are arranged in sequence outside the twisted pair of insulated conductors 9; The second drain wire 15 ; each insulated conductor 9 respectively includes a tinned copper strand stranded conductor 13 , and an insulating layer 14 is wrapped around the tinned copper strand stranded conductor 13 .
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Abstract
The invention relates to the technical field of cable manufacturing, in particular to a flexible cable for an intrinsic safety DCS. The flexible cable comprises a cable core, and a lapping cabling layer, a main shielding layer, a lining layer, an armor layer and an outer sheath layer are arranged on the outer side of the cable core in sequence. A filling layer is arranged between the cable core and the lapping cabling layer. A first drainage wire is arranged between the lapping cabling layer and the main shielding layer. The cable core comprises a plurality of strands of stranded wire cores, each wire core comprises a set of insulation conductors twisted in pair, and colored tape layers, belting layers and split-phase shielding layers are sequentially arranged on the outer side of the insulation conductors twisted in pair. Second drainage wires are arranged between the belting layers and the split-phase shielding layers. Each insulation conductor comprises a tinned copper wire bunch stranded conductor, and the tinned copper wire bunch stranded conductors are coated with insulation layers. The flexible cable is reasonable and novel in structure, scientific and particular in material and low in capacitance and inductance, electric sparks are not prone to being generated, and intrinsic safety is achieved. Meanwhile, the excellent properties of flame retardance, interference resistance, oil resistance, ozone resistance and the like are achieved.
Description
technical field [0001] The invention relates to the technical field of cable manufacturing, in particular to a flexible cable for an intrinsically safe DCS system. Background technique [0002] The DCS system (or decentralized control system) is based on a microprocessor, characterized by decentralized control of the microcomputer, centralized operation and management, and integrates advanced computer technology, communication technology, CRT technology and control technology, that is, 4C technology. New control system. Intrinsically safe flexible cables for DCS systems are mainly used in petroleum, chemical, electric power, gas engineering, mines and other occasions with explosion hazards and other occasions with high explosion-proof safety requirements to transmit automatic control signals. The cable has low capacitance, low inductance, excellent shielding performance and anti-interference performance. Since there is no product standard for DCS system cables in China and ...
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IPC IPC(8): H01B7/00H01B7/02H01B7/17H01B7/295H01B7/04
Inventor 薛守荣王寿权薛强
Owner 扬州市金阳光电缆有限公司
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