Railway digital signal cable with integrated water stop function
A digital signal cable and functional technology, applied in the direction of twisted/quad-stranded cables, insulated cables, cables, etc., can solve the problems of shortening the service life of cables, aging of cable cores, and reduction of dielectric strength, etc. Achieve the effects of preventing cable core aging, improving safety and reliability, and prolonging service life
Active Publication Date: 2008-07-16
TONGDING INTERCONNECTION INFORMATION CO LTD +1
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[0002] In the prior art, the railway digital signal cable includes a cable core, and the cable core includes at least one set of inner shielded quadruples, and an aluminum sheath layer for shielding, moisture resistance and lateral pressure resistance is arranged on the outside of the cable core, and the cable is protected in the longitudinal direction. The metal armor layer of the cable core and the outer sheath layer for insulation protection, and because the layers outside the cable core cannot play a role in comprehensive water resistance, in practical applications, water and moisture will still flow from the end face of the cable and the outer sheath layer. The surface penetrates into the cable core, resulting in the aging of the cable core and the reduction of insulation strength, which makes the safety and reliability of railway digital communication lower and shortens the service life of the cable
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[0011] See attached figure 1 As shown, a railway digital signal cable with comprehensive water blocking function includes a cable core, and the cable core includes a plurality of sets of signal wires, at least one set of the signal wires is an inner shielded four-wire group 8, and the cable core is also It includes a pair of twisted wires 10 (ordinary twisted wires), which are usually used to transmit monitoring signals, and the gaps between the signal wires are filled with water-blocking grease 9 . The inner sheath layer 6, the second water-blocking tape 5, the aluminum sheath layer 4, the first water-blocking tape 3, the metal armor layer 2, and extrusion bonding are sequentially arranged on the outside of the cable core from inside to outside. The outer sheath layer 1 on the metal armor layer 2, the first water blocking tape 3 and the second water blocking tape 5 are all made of water-soluble swelling materials.
[0012] The inner side of the inner sheath layer 6 is also p...
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The invention is a railway digital signal cable with synthetic water stopping function, comprising a cable core, which comprises plural groups of signal lines, where at least a group of signal lines is an inner-screened four-line group, gaps between the signal lines are filled with water stop yarns and ointment, the cable core is provided in order with third water stop band, inner jacket layer, second water stop band, aluminum jacket layer, first water stop band, metallic armouring layer, and outer jacket layer bonded on the metallic armouring layer, the water stop ointment can effectively prevent water and damp from entering from the cable end surface into the cable core, each water stop band can play the role in vertically stopping water, and the aluminum jacket layer and the inner jacket layer can also play the role in horizontally stopping water, thus able to prevent cable core ageing, improving insulating property of signal lines, prolong cable service life and improving safety and reliability in railway digital communication.
Description
technical field [0001] The invention relates to an inner shielding railway digital signal cable. Background technique [0002] In the prior art, the railway digital signal cable includes a cable core, and the cable core includes at least one set of inner shielded quadruples, and an aluminum sheath layer for shielding, moisture resistance and lateral pressure resistance is arranged on the outside of the cable core, and the cable is protected in the longitudinal direction. The metal armor layer of the cable core and the outer sheath layer for insulation protection, and because the layers outside the cable core cannot play a role in comprehensive water resistance, in practical applications, water and moisture will still flow from the end face of the cable and the outer sheath layer. The surface penetrates into the cable core, resulting in the aging of the cable core and the reduction of insulation strength, which makes the safety and reliability of railway digital communication...
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IPC IPC(8): H01B11/06H01B7/282H01B7/288
Inventor 应志忠陈兵沈红妹
Owner TONGDING INTERCONNECTION INFORMATION CO LTD