The invention provides an insulated track circuit. Each section of the insulated track circuit comprises a sending side and a receiving side; each of the receiving side and the transmitting side comprises a common mode inductor unit, a lightning protection transformer, a transmission cable, a matching transformer, a tuning unit and a transceiving device; the transmitting-receiving device is connected with the steel rail through the lightning protection transformer, the transmission cable, the common mode inductor unit and the matching transformer in sequence. The tuning unit is arranged between two connection points of the matching transformer and the steel rail; the tuning units are located at two ends of a mechanical insulation joint in the insulation track circuit; the tuning unit is used for generating series resonance for adjacent section signals to form short-circuit impedance approaching zero and generating parallel resonance for the section signals to form high impedance; the transmission cable presents a capacitive transmission cable under the condition that a signal exists, and the inductive transmission cable and the common-mode inductor unit form parallel resonance to the signal of the section, so that high impedance is generated; therefore, after the mechanical insulation joint has a damage fault, the channel impedance is increased, the power of a track circuit transmitter is reduced, and fault upgrading is avoided.
本发明提供一种绝缘轨道电路,其每个区段包括:发送侧和接收侧;该接收侧和发送侧均包括:共模电感单元、防雷变压器、传输电缆、匹配变压器、调谐单元和收发装置;收发装置依次通过防雷变压器、传输电缆、共模电感单元和匹配变压器连接钢轨;调谐单元设置于匹配变压器与钢轨的两个连接点之间;调谐单元位于绝缘轨道电路中机械绝缘节两端;调谐单元,用于对邻区段信号产生串联谐振形成短路阻抗趋近于零,且对本区段信号产生并联谐振形成高阻抗;传输电缆在有信号的情况下呈现容性传输电缆与共模电感单元的感性对本区段的信号形成并联谐振,产生高阻抗;从而,机械绝缘节出现破损故障后,升高通道阻抗,降低轨道电路发送器功率,由此避免故障升级。
Insulated track circuit
一种绝缘轨道电路
2024-03-08
Patent
Electronic Resource
Chinese
IPC: | B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC |
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