SU1222590A1 - Decoder for rail track circuit - Google Patents

Description

The invention relates to railway automation and is intended for use in self-locking DC with autonomous traction.

The purpose of the invention is to improve the noise immunity.

FIG. 1 is a circuit diagram of a track circuit; in fig. 2 is a schematic diagram of a rail track decoder.

In the track circuit there are rail tracks. During the next interval, the process of filament 1, insulating joints 2. At the same time, and the energy of the capacitor 9

its end has a power source 3, and on the other - a pulse track relay 4 with contact 4.1, resistor 5, code transformer 6, contact 7, transmitter relay (relay not shown).

The decoder contains a track relay 8 with contact 8.1, a capacitor 9, a diode 10, an inductor I, a second capacitor 12, a resistor 13, a contact 14 of the transmitter relay.

The device works as follows: it will be interrupted by contact 4.1 of the pulse-impulse track relay 4, then by contact 14

With a free track circuit, a pulse-transmitter relay, i.e. a busy participating relay 4 receives a pulsed-current circuit, the red power supply from the power source 3 (traffic signal) will be reliably fenced in.

Mitter relay de-energized). In the decoder, during the interval, through the contact 4.1 of the pulse relay, the throttles And and the capacitor 12 are connected to the power source and energy is accumulated in these elements. During an impulse, when the closing contact 4.1 of the pulse traveling relay is closed, the energy stored in the capacitor 12 and the choke 11 excites the track relay 8 and charges the capacitor 9.

keeps relay 8 in the excited state.

With switched noise by pin 7 of the transmitter relay (occupied by that rail circuit), pulse relay 4 operates in a pulsed mode (from interference impulses). However, in the decoder the chain of accumulation of energy of the capacitor 12 and drossel 11

 During the next interval, the process is repeated, and the energy of the capacitor 9

Mitter relay de-energized). In the decoder, during the interval, through the contact 4.1 of the pulse relay, the throttles And and the capacitor 12 are connected to the power source and energy is accumulated in these elements. During an impulse, when the closing contact 4.1 of the pulse traveling relay is closed, the energy stored in the capacitor 12 and the choke 11 excites the track relay 8 and charges the capacitor 9.

 During the next interval, the process is repeated, and the energy of the capacitor 9

 it will be broken by contact 4.1 of the pulse track relay 4, then by contact 14

keeps relay 8 in the excited state.

With switched noise by pin 7 of the transmitter relay (occupied by that rail circuit), pulse relay 4 operates in a pulsed mode (from interference impulses). However, in the decoder the chain of accumulation of energy of the capacitor 12 and drossel 11

ABOUT

FIG. g

Claims (1)

DECODER FOR THE RAIL CHAIN, containing a control relay, in parallel with the winding of which is connected a capacitor connected by one plate to one pole of the power supply and one terminal of the inductor, the other terminal of which is connected to the diode connected to the other plate of the capacitor through the make contact of the pulse track relay, characterized in that, in order to increase the noise immunity, it is equipped with an additional capacitor connected in parallel with the inductor and diode, and parallel to the closing contact of the pulse evogo relay connected its break contact connected to the other pole of the power source, and between said contacts and the diode included break contact relay transmitter. FIG. 1