High-flame-retardant intercity rail transit cable
A rail transit cable, high flame-retardant technology, applied to insulated cables, bendable cables, cables, etc., can solve the problems of disaster relief work difficulties, long self-extinguishing time and loss of flame-retardant cables, and achieve reasonable cable structure design , superior thermal stability, good performance
Pending Publication Date: 2021-02-05
江苏通鼎光电科技有限公司 +1
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Problems solved by technology
As the central nervous system of urban rail transit, the intercity rail transit cable is generally laid along the track on the edge of the track. The cable has been working in such an occasion for a long time, and most of the cable insulation and sheath cannot withstand the strong radiation requirements. In the event of a fire, cables with poor flame retardant properties will extinguish themselves for a long time after burning, which will bring great difficulties to disaster relief work and cause greater damage and losses
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[0024] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0025] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention Creation and simplification of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should no...
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Abstract
The invention provides a high-flame-retardant intercity rail transit cable which comprises a cable core and a protective layer structure wrapping the cable core, and the cable core comprises at leastone wire set. The wire set comprises four insulating single wires which are in different colors and are twisted with one another, a first flame-retardant layer, a copper-plastic composite belt and a second flame-retardant layer are sequentially coated outside the insulating single wires from inside to outside, and a discharge wire winding layer formed by twisting a plurality of discharge wires isarranged between the copper-plastic composite belt and the first flame-retardant layer; and the protective layer structure comprises a fourth flame-retardant layer, an oxygen barrier layer, a metal shielding layer, a carbon composite refractory material layer, a steel tape armor layer and an outer sheath which are sequentially coated from inside to outside. The cable provided by the invention is reasonable in structural design, has excellent thermal stability, moisture resistance, mechanical and physical properties, high flame retardance and high temperature resistance, can bear a relatively large radiation dose, and is long in service life and good in use performance.
Description
technical field [0001] The invention belongs to the technical field of the cable industry, and in particular relates to a high flame-retardant intercity rail transit cable. Background technique [0002] With the rapid construction of urban rail projects in various cities, cables are required not only to have general characteristics, but also to be crack-resistant, halogen-free, low-smoke, flame-retardant, and long-lived, as well as to have specific environmental resistance. As the central nervous system of urban rail transit, the intercity rail transit cable is generally laid along the track on the edge of the track. The cable has been working in such an occasion for a long time, and most of the cable insulation and sheath cannot withstand the strong radiation requirements. In the event of a fire, cables with poor flame retardancy will extinguish themselves for a long time after burning, which will bring great difficulties to disaster relief work and cause greater damage and...
Claims
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IPC IPC(8): H01B7/29H01B7/00H01B7/02H01B7/04H01B7/17H01B7/18H01B7/28H01B7/282H01B7/295H01B7/42
CPCH01B7/0009H01B7/0216H01B7/04H01B7/17H01B7/18H01B7/1875H01B7/28H01B7/2806H01B7/2813H01B7/282H01B7/292H01B7/295H01B7/421Y02A30/14
Inventor 沈小平周江沈林林刘修红张洋
Owner 江苏通鼎光电科技有限公司