A high-power railway communication signal control photoelectric integrated cable

Abstract

The invention discloses a high-power railway communication signal control photoelectric integrated cable, which includes a cable core, and the cable core includes a plurality of mutually twisted wire pairs such as a single wire, a pair of wires, a three-wire group, and a star twisted group. The cable core is filled with other water-blocking filling materials such as cable water-blocking ointment or water-blocking yarn. The above-mentioned wire pairs are twisted by two insulated wire cores at equal intervals, and the twisted pitches of adjacent wire pairs are different. The insulated wire core is a conductor with a diameter of 1.4-1.8mm, and the outer side is covered with an insulating layer made of cross-linked polyethylene material. The insulating layer is colored or printed with a digital logo. An optical communication unit composed of multiple optical fibers and multiple groups of wire pairs or filled single wires, and an alarm wire is embedded in the shielding layer. The invention discloses a high-power railway communication signal control photoelectric integrated cable, which greatly improves the actual use performance under the premise of maintaining its original excellent electrical performance.

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.

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