SU78887A1 - Relayna semi-automatic blocking - Google Patents

Description

There are known schemes of relay semi-automatic blocking of railroad tracks.

A distinctive feature of the proposed blocking is that it is carried out on one linear wire using a low frequency current in the order of 80-200 Hz. As a receiver, polarized relays with dry rectifiers are used, which include a device with a circuit of voltage and current resonant circuits.

FIG. 1 and 2 are diagrams of the device.

FIG. 1 is a diagram of a selector used as a receiver of a blocking signal, where LiCi form a series resonant circuit, and LiL-2 a parallel resonance circuit, both circuits are built on the same frequency.

As a result of this inclusion, the selector relay is triggered only at a certain frequency band equal to 80-200 Hz.

An electromechanical interrupter (buzzer) with a hard core is used as a source of alternating current.

The general scheme of the proposed blocking, as applied to push-pull, is given in FIG. 2

Between the stations L and B, for both directions, two channels are superimposed on one wire:

a) channel of direct current (flat line). It is built on the principle of duplex communication known in telegraphy and serves to transmit nonresponsible notices, such as: about the departure of the train and acknowledgment of receipt of a signal of arrival;

b) AC channel (dotted line for even direction and dotted line with dot for odd).

This channel transmits the most critical signal — the arrival of a train; the source of the signal is buzzer 3 and receiver selector C.

No. 78887-2 -

The operation of the circuit is as follows. If the odd distillation is free, the selector is energized and the output signal is opened by turning the knob. Opening the output signal will cause the selector to be de-energized and the linear battery (LBL) will be connected to the line. This will not affect the state of the PRL relay, but will entail the PRV relay (duplex) actuation, and thus to the station. B will be noted that an even train has been sent. Signal closure at st. And it will happen automatically.

Upon arrival of the composition at st. B, the odd pedal (Pen) is triggered, which makes it possible, after pressing the arrival button, to send alternating current (from buzzer 3) to the line. This current is sensed by the Cd selector, which is triggered, blocked, and the circuit returns to its original state. At the same time, the selector contact C A turns off the line battery LBL from the line, as a result of which the PR relay will also return to the initial state. The latter will indicate that the blocking signal has been received. The supply of the AC signal is automatically terminated -. In the even direction, the action of the scheme is similar.

Subject invention

Relay semi-automatic interlock, using a single line wire, using low-frequency current of about 80-200 Hz and receivers, which use polarized relays with dry rectifiers included in the device with a circuit of resonant voltage circuits.

FIG. 2