High-power railway communication signal control photo-electricity composite cable

Abstract

The invention discloses a high-power railway communication signal control photo-electricity composite cable which comprises a cable core. The cable core comprises a plurality of wire pairs of single wires, twines, three-wire sets and star twisting sets which are twisted. The cable core is filled with water-stopping filler materials such as cable water-stopping factice and water-stopping yarn. The outer side of the cable core is sequentially coated with a water-stopping layer, a shielding layer, a lining layer, an armor layer and an outer protection layer. The wire pairs are formed by twisting two insulation wire cores and the like in an equal pitch mode, and the twisting pitches of every two adjacent wire pairs are different. Each insulation wire core is a conductor with the diameter ranging from 1.4mm to 1.8mm, and the outer side of each insulation wire core is coated with an insulating layer made of a crosslinked polyethylene material. The insulating layers are colored or printed with figure identifications in a spraying mode. The interior of the cable core comprises a photo-communication unit formed by a plurality of optical fibers, and the wire pairs or the filled single wires. An alarm wire is embedded in the shielding layer. According to the high-power railway communication signal control photo-electricity composite cable, the actual use performance is greatly improved on the premise of ensuring the original excellent electrical performance of the cable.

Description

technical field [0001] The invention relates to a railway cable, in particular to a high-power railway communication signal control photoelectric integrated cable. Background technique [0002] The existing railway digital signal cables meet the railway industry standards TB / T 2476 "Railway Signal Cable" and TB / T3100 "Railway Digital Signal Cable". Polyethylene insulated single wire construction. [0003] For a long time, in the use of various railway signal cables, when large current and long transmission distance control information transmission or power supply is required, multiple wire cores are used in parallel. This method not only brings inconvenience to construction, but more importantly Because it is a multi-core parallel connection, in practical applications, when one or several wires are broken, because the other wires are still connected, but because the line is in an abnormal state at this time, the transmission of control information and power supply have been...

AI Technical Summary

Problems solved by technology

[0003] For a long time, in the use of various railway signal cables, when large current and long transmission distance control information transmission or power supply is required, multiple wire cores are used in parallel. This method not only brings inconvenience to construction, but more importantly Because it is a multi-core parallel connection, in practical applications, when one or several wires are broken, because the other wires are still connected, but because the line is in an abnormal state at this time, the transmission of control information and power supply have been stopped. Make the signal control or execution equipment in an abnormal state. In the long-term vibration environment of the cables laid along the railway line, this connection method is very easy to cause individual wires to break. When individual wires break, this serious accident hazard state cannot be displayed. , which is covered up, which poses a great threat to the safety of trains

[0004] For railway signal engineering, the cable grounding fault is also a very difficult problem, because the cables are not always buried in the cable trenches, but laid in the reserved cable trenches on both sides of the line, coupled with cross construction, it is inevitable If the cable is smashed and the cable core wire is grounded, if it is not found or repaired in time, because the cable is used in a section with strong electromagnetic field interference, the current in the cable shielding layer may be introduced into the cable core wire , so that the strong interference signal introduced in the transmission core wire will cause the terminal equipment to malfunction or damage the equipment, which will also pose a great threat to the safety of the train.

Images