A water-blocking railway digital signal cable

Abstract

The present invention provides a waterproofing railway data signal cable. The waterproofing railway data signal cable comprises a cable core and a cable core protective layer which coating the outside of the cable core; the cable core comprises at least one wire set, and each wire set includes a PBT beam tube, a plurality of insulation single wires in the PBT beam tube and a wire set protective layer arranged at the outside of the PBT beam tube; the wire set protective layer includes a waterproofing glass fiber woven belt and a sheath in order from inside to outside; waterproofing yarns fill between the insulation single wires and between the insulation single wires and the PBT beam tube; and the cable core protective layer includes a PET belt winding layer, a waterproofing winding layer, a thermal-protective layer, a metal shielding layer, an inner layer, a waterproofing glass fiber woven belt winding layer, an armor layer and a polyethylene over sheath, wherein the armor layer is a corrugated pipe copper belt armor. The waterproofing railway data signal cable is reasonable in structure design and excellent in horizontal water blocking and vertical water blocking functions and in functions such as temperature resistance, moisture protection, crush resistance, bite proofing by animals and the like, and completely satisfies the requirement of the high-speed railway on the cables.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a water-blocking railway digital signal cable. Background technique [0002] The railway digital signal cable in the prior art, due to design defects, after the cable enters the water, the water flow will continue to spread in the cable core, causing serious quality problems such as the decrease of the cable insulation resistance, excessive capacitance, conductor oxidation, and metal layer corrosion. High-quality railway digital signal cables have poor water resistance and water vapor permeability, poor shielding effect, and low mechanical strength. If the signal cable fails, it will cause temporary stop of the train, or cause system chaos in severe cases, with disastrous consequences. Therefore, it is imminent to carry out technological innovation on the structure of railway digital signal cables. Contents of the invention [0003] In view of this, the present inve...

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Problems solved by technology

[0002] The railway digital signal cable in the prior art, due to design defects, after the cable enters the water, the water flow will continue to spread in the cable core, causing serious quality problems such as the decrease of the cable insulation resistance, excessive capacitance, conductor oxidation, and metal layer corrosion. The railway digital signal cable has poor water resistance and water vapor permeability, poor shielding effect, and low mechanical strength. If the signal cable fails, it will cause the train to stop temporarily, and the system will be confused if it is serious. The consequences are disastrous

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