Seamless internal shielding railway digital signal cable
A digital signal cable and inner shielding technology, which is applied in the direction of communication cables, insulated cables, twisted/four-stranded cables, etc., can solve the problem of cracking at the longitudinal cladding seam of the shielding layer and leakage welding of the shielding layer , The shielding layer is not tightly bonded to the package, etc., to achieve the effect of good shielding effect, superior shielding, and not easy to deform
Inactive Publication Date: 2017-06-20
江苏通鼎光电科技有限公司
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Problems solved by technology
[0003] In view of this, the present invention aims to propose a seamless inner shielded railway digital signal cable, which solves the problems of insufficient bonding of the shielding layer in the prior art, missing welding of the shielding layer, and cracking at the longitudinal seam of the shielding layer. question
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[0017] 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.
[0018] 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 the description of the present invention, unless otherwise specified, "plurality" means two or mo...
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The invention creates and provides a seamless internal shielding railway digital signal cable. The seamless internal shielding railway digital signal cable comprises a cable core and a protection layer, wherein the protection layer is arranged at an outer side of the cable core, the cable core comprises at least one shielding four-wire group, each single insulation wire in the shielding four-wire group comprises a copper conductor and an insulation layer wrapping the copper conductor, bunching yarn encircles the peripheries of the single insulation wires, a PE cobwebbing tape wrapping layer, a seamless shielding layer and a PP tape wrapping layer are sequentially arranged at an outer side of the bunching yarn, a current relief wire is arranged between the PE cobwebbing tape wrapping layer and the seamless shielding layer, and the protection layer comprises a polyester tape wrapping layer, a seamless aluminum sheath, an inner cushion layer, a seamless armoring layer and an outer sheath which are sequentially arranged from inside to outside. The cable employs the seamless shielding layer, is firm, is not liable to deform and has relatively high tensile strength and bending performance; no gap is formed in the seamless shielding layer, electromagnetic leakage cannot be generated, and the shielding effect is good; and the cable has excellent functions of shielding, temperature resistance, humidity prevention, pressure resistance and the like and is prevented from being bitten by animal teeth, and the application of high-speed railway at present is completely met.
Description
technical field [0001] The invention belongs to the technical field of cable design and manufacture, and in particular relates to a seamless inner shielding railway digital signal cable. Background technique [0002] Inner shielded railway digital signal cable has the function of transmitting analog signal (1MHz), digital signal (2Mbit / s), rated voltage AC 750V or DC 1100V and below system control information and power transmission function, suitable for railway signal automatic blocking system, axle counting , Station coding, computer interlocking, microcomputer monitoring, centralized dispatching, dispatching supervision, high-power electric switch machines and other related signal equipment and control devices to transmit control information, monitoring information and electric energy. Compared with non-inner shielded railway digital signal cables, it solves the limitation of "different cables with the same frequency", greatly reduces the project cost, and its effect is e...
Claims
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IPC IPC(8): H01B11/00H01B11/06H01B7/17H01B7/18H01B7/20H01B7/28H01B7/29
CPCH01B11/005H01B7/17H01B7/18H01B7/20H01B7/205H01B7/28H01B7/29H01B11/06
Inventor 沈小平周江
Owner 江苏通鼎光电科技有限公司