SU1627440A1 - Device for automatic control of track circuit voltage - Google Patents

Abstract

The invention relates to railway automation, in particular to rail circuits. The purpose of the invention is to increase reliability. With increasing rail drawdown resistance, relays 6–8 control the decrease or increase in voltage due to the discharge of capacitors 11 and 12. The frequency of checking the voltage on the track relay 5 is triggered by means of time delay relay 9. Depending on the operation of the relay 6-8 and the signal relay 14, the switching relay operates, the switching contacts of which switch the circuits of one of the windings of the supply transformer 1. As a result, a different voltage is applied to the rail circuit. 2 Il.

Description

The invention relates to railway automation, namely to rail chains.

The purpose of the invention is to increase reliability.

Figure 1 shows a circuit diagram of a track circuit; Fig. 2 is a schematic diagram of the switching relay connection. The device contains a power transformer 1, a transmitter relay (not shown), the closing contact 2 of which with a resistor 3 connected in parallel is connected to the circuit of one of the windings of the transformer 1, in parallel to which the control relay 4 is connected, the closing contact 4.1 of which is connected to the circuit of the other winding of the transformer 1 The device has a track relay 5 with a switching contact 5.1 and parallel with it a relay 6 controlling voltage reduction with switching contacts 6.1 and 6.2, a relay 7 with a closing contact 7.1, a relay 8 which roll of voltage increase, respectively, with disconnecting contacts 8.1 and 8 2, time delay relay 9 with switching contacts 9.1-9.5 and disconnecting contact 9.6 included in the power supply circuit of the thermoelement 10, the switching contact 10.1 of which is connected to the power supply circuit of the relay 9, through contacts 9.1- 9.4 of which capacitors 11 and 12 are connected to relays 5 or 6 and 7, and contact 9.5 is included in the contact circuit of relay 8. Contact 5.1 of relay 5 is included in the circuit of the decoder 13, the output of which is connected to a signal relay 14, closing contacts 14.1 and 14.2 of which with contacts and 6.1 and 6.2 relays 6 and contacts 8.1 and 8.2 relays 8 are included in the circuit including relays 15 with switching contacts 15.1 and 15.2, opening contacts 15.3 and 15.4 and relays 16 with switching contacts 16.1 and 16.2 and opening contacts 16.3 and 16.4, and contacts 15.1 and 15.2, 16.1 and 16.2 are included in the charge-discharge circuits of capacitors 17 and 18, 19 and 20. Switching relay 21 has switching contacts 21.1, 21.2, 21.3, closing contacts 21.4-21.7, switching relay 22 has switching contacts 22.1, 22.2, closing contacts 22.3-22.5. The switching relay 23 has a break contact 23.1.

The operation of the decoder 13 is monitored by a check relay 24, the closing contact 24.1 of which is connected to the power supply of the decoder 13. To eliminate the reverse make-up circuits, diodes 25-28 are used. The device operates as follows.

Under reduced voltage on the winding of the track relay 5, the latter continues to operate in pulses, and relay 7 is excited by the capacitor 12 cannot (not enough

capacitor charge energy). After the crust of the relay 9 falls off, when the contact 9.5 switches, the relay 8, having withstood the slowdown, releases the measles. Such switching off of relay 8 takes place at each de-energizing of the relay 9 due to the contact 9.5 at a low voltage value on the capacitor 12, and consequently, on the winding of the track relay 5.

When the voltage on the winding of the track relay 5 is too high, the latter continues

5 triggered in the working pulses and releases when the power is weak. Capacitor 11 stores enough energy to energize voltage boost relay 6. At the time of discharge of the capacitor 11 relay 6

0 keeps measles in the intact state. Under normal voltage on the winding of the track relay 5, the relay 6 continuously holds the measles in the falling off position, and the relay 8 - in the excited state, with a reduced voltage level, the relay 8 turns off, and at an increased voltage, the relay 6 turns on.

When contact 10.1 is closed, relay 9 de-energizes and closes the thermoelement circuit 10 with its contact 9.6. After heating

0 thermoelement 10 due to contact 10.1, the relay 9 is energized and contact 9.6 opens the thermoelement circuit 10. The failure of the thermoelement 10 leads to the opening of the front contact 10.1, after one minute 5 to the closure of the contact 10.1. At the moment of switching the contact 10.1 of the thermoelement 10, the relay 9 continues to hold the pin pulled by the lower winding.

Excite or de-energize the relay

0 21 and 22 are determined by the presence of charge on capacitors 17-20, whose circuits are selected by the contacts of relay 21 and 22. If both relays 21 and 22 are de-energized, a charge circuit is formed only for capacitor 18. When

5 energizing the relay 7 and 8 by increasing the voltage switches the contact 15.2 of the relay 15 and the capacitor 18, which is energized by the relay 21, excites it. Another contact 15.4 relay 15 breaks the circuit of the relay 23, which contact

0 23.1 closes the blocking circuit of the counting relays 21 and 22. After de-energizing the relay 15, its contact closes the blocking circuit of the relay 21 and 22, the circuit of the relay 23. The contact 21.1 of the relay 21 connects the transformer section 1.

five

Claims (1)

Apparatus of the Invention A device for automatic regulation of a rail circuit voltage, comprising a supply transformer, a transmitter relay, a closing contact. which is connected to the circuit of one of the windings of the supply transformer, a track relay and a voltage reduction control relay and a voltage increase control relay connected in parallel with it, in order to increase reliability, it is equipped with a signal relay, control relay, capacitor, resistor , including relays, switching relays and time delay relays, through the closing contacts of which one of the capacitors is connected in parallel to the track relay, & through the opening contacts, respectively, to the voltage decrease control relay and to one of the voltage increase control relays, and in the power supply circuit of the other voltage increase control relay are connected in series the switching contact of the time delay relay and the closing contact of the first voltage control relay, in the power circuit of the connected in parallel switching relays are connected in series 0 five 0 five the connected closing contacts of the signal relay, the switching contacts of the control relay for voltage reduction and the opening contacts of the second relay control voltage increase, and the disconnecting contacts of the switching relays are included in the switching relay power supply circuits, parallel to the windings of one of which other capacitors are connected via the closing contacts of the switching relays charging circuits of which include disconnecting contacts of switching on relays and switching contacts of one of the switching relays whose self-locking circuits include their own The main closing contacts and the opening contact of the third switching relay, and the switching contacts of the switching relay are connected to one of the windings of the supply transformer, in parallel with which a control relay is connected, the closing contact of which is connected to the other winding of the supply transformer, and a resistor is connected parallel to the contact of the transmitter relay.