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方向电路是双向自动闭塞的关键电路,它是两站间闭塞关系的基础,并通过它建立各站间的双向自动闭塞区间。因此它是双向自动闭塞制式中不可缺少的关键组成部分。一、四线制改方电路的特点四线制改方电路把由原两线制电路完成的控制和监督区间这两项“任务”分别由两个回路的四条线来完成,由于将改变区间运行方向的控制回路与区间占用的监督回路分别独立设置,二者之间互不干扰使电路的故障机率大大降低,提高了电路动作的可靠性,从而保证了运输的需要,实现了安全和效率的统一。
The directional circuit is the key circuit of bidirectional automatic blocking. It is the basis of the occlusion relationship between two stations, and establishes the bidirectional automatic blocking interval between stations through it. It is therefore an indispensable part of the bidirectional automatic block system. First, the characteristics of a four-wire circuit to rewrite the circuit Four-wire circuit to rewrite the original two-wire circuit to complete the control and supervision of these two “tasks ” from the two loops of the four lines to complete the The control loops that change the running direction of the interval and the supervision loops that occupy the interval are set separately. The mutual non-interference between the two can greatly reduce the probability of the failure of the circuit and improve the reliability of the circuit operation so as to ensure the transportation needs and achieve the safety And the unity of efficiency.