SU1224204A1 - Impulse rail track circuit receiver - Google Patents

Abstract

The invention relates to the field of railway automation and is intended to monitor the state of the track circuit. The device relates to the field of railway automatics and is intended to monitor the condition of the track circuit on railway tracks. The aim of the invention is to increase reliability with continuous disturbance in the track circuit by eliminating the false positives of the actuating travel relay. The drawing shows a circuit diagram of the proposed device of a pulsed rail circuit receiver. The device contains a pulse track relay 2 with terminal 2.1 and a coding transformer 3 connected to the rail circuit 1 at the receiving end. Transmitter relay 4 with contacts 4.1 and additional rear contact 4.2, executive relay relays 5 with contacts 5.1-5.4. connected in parallel to the accumulating capacitor 6. connected in parallel to the inductor 7 coil. Consistently with the accumulating capacitor b and the railroad tracks x. The aim of the invention is to increase reliability by eliminating the false positives of an actuating travel relay. The receiver of a pulsed rail circuit has an executive track relay 5, the power circuit of which includes pin 2.1 of a pulse track relay 2. in series with which inductor 7 is connected, in parallel with which the rear pin 4.2 of the transmitter relay is connected, and diode 8 and relay 5 connected in series with it, parallel to which is included the capacitor 6. 1 Il. With a useful track relay 5, a key diode 8 and a resistor 9 are switched on to reduce spark formation at pin 2.1. Through the front contacts 5.3 and 5.4 of the executive track relay 5, the lamp of the permitting light of the traffic light 10 enclosing the rail circuit 1 is turned on. The power supply of the code transformer 3 is provided by the alternating current of the signal frequency of the automatic locomotion signaling system. The power of the pulsed traveling relay 2 is carried out by pulses of direct current, sent from the feeding end (in Fig. Not shown o) of the track circuit 1. The power supply to the transceiver of the relay 4. as well as the executive traveling relay 5 is supplied from the source of the Walk. The receiver works as follows. When the railway circuit 1 (RC) is free from rolling stock, the pulse track relay 2 operates in a pulsed mode from a source of DC pulses; pohO yu go

Description

from the feed end of the RC 1 by the pendulum transmitter.

Periodic (with a period of about 2 Hz) closing contact 2.1 causes the connection of a constant voltage source to the inductor 7, the current through which gradually increases and reaches during the pulse of a steady-state value determined by the active resistance of the winding of the inductor 7. When contact 2.1 of relay 2 is opened, a self-induction EMF occurs on the coil 7, and the current charges the accumulating capacitor b, which is then discharged to the executive track relay 5. At the same time, the pin of relay 5 is held in the pulled position for the whole time until the next current pulse EMF of self-induction coil 7 inductance. Executive track relay 5 fixes the vacancy of RC 1 and with contacts 5.3 and 5.4 it turns on the enabling signal at traffic lights 10, enclosing RC 1.

When the rail circuit 1 is occupied by the train, the current pulses on the rail circuit 1 do not reach the pulse track relay 2. Its contact 2.1 remains open and the executive track relay 5 de-energizes. Contact 5.1 of the executive track relay 5 closes the power supply circuit of the transmitter relay 4, and contact 5.2 closes the power supply of the code transformer 3. The transmitter relay 4 starts to operate in a pulse-code mode from the track transmitter (not shown) according to a typical circuit. The front contact 4.1 periodically connects the secondary winding of the code transformer 3 to the rail line, sending AC code pulses, which cause the work, to the automatic locomotive signaling system towards the train.

Consider the operation of the receiver circuit with a free RC 1 from the train, but if there is a supply of a pulsed traveling relay 2 with direct current from a postrone source, bypassing the insulating junction of the RC 1. Leaving for a long time under current, the pulsed traveling relay 2 closes pin 2.1. As a result, the executive track relay is de-energized, turns off the enable signal at traffic light 10 and connects the code supply to the transmitter relay 4, the transmitter relay 4 receives power and periodically breaks its rear and closes the front contact 4.1, thereby sending code pulses to the rail circuit the locomotive signaling current, and the impulse track relay 2, in time with the operation of the transmitter relay, but in antiphase, releases its measles and breaks the circuit of the current flowing through the delaying inductor 7. However, the executive track relay 5 does not work, because. by the moment of breaking the contact 2.1, the charge of the accumulating capacitor 6 is broken by contact 4.2 of the transmitter relay.

To eliminate large overvoltages of self-induced EMF contact. 4.2 is shunted by a resistor on which the main part of the energy is dissipated without creating an opportunity for its accumulation in

capacitor b. The function of the key diode 8 is to exclude the charge discharge of the accumulating capacitor b through the inductor 7.

The train’s entry at such a RC 1 is not

changes the receiver's mode of operation until the moment of shunting the wheel pairs of the pulsed traveling relay 2. This relay 2 stops attracting, the executive traveling relay 5 remains de-energized,

and Transmitter relay 4 continues to send an automatic locomotive signaling system to the Koctz rail circuit.

Claims (1)

Invention Formula Receiver pulsed rail circuit containing a transformer and a pulse track relay connected to the rails, respectively, through the front and one of the rear contacts of the transmitter relay, in the power circuit of which the rear is turned on contact of the executive traveling relay, the winding of which is connected in parallel accumulating capacitor coil inductance connected to the source power supply through the contact of the traveling pulse relay and the key element, characterized in that, in order to increase reliability by eliminating the false positives of the executive track relay, between the inductor and the cathode of the key element, the rear contact of the transmitter relay is turned on. Edited by Girinsk Compiled by N.Skorikov Tehred M.MorgentalKorrektor T.Malets  nd nmmpm g Subscription vniipi State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow. G-35. Raushska nab., 4/5 Production and publishing complex Patent, Uzhgorod. 101 Gagarin St.