SU1736798A1 - Arrangement to control drive of railway switch - Google Patents

Abstract

This invention relates to railway automation devices. The purpose of the invention is to increase reliability. This goal is achieved by the fact that between the cathodes of the thyristors 26 and 27 and, respectively, windings 3 and 4 of the electric motor, contacts 24.2 and 24.3 of the auxiliary relay 24 are connected, the winding circuit of which includes the positive and negative control contacts 12 and 13. 1 Il.

Description

The invention relates to railway automatics devices, in particular, to devices for controlling switches.

The purpose of the invention is to increase reliability.

The drawing shows a schematic block diagram of the device.

The device contains a switch motor drive 1 with an electric motor 2, excitation windings 3 and 4, sensors 5 and 6 of a contactless autoswitch, the primary windings of which are connected to the winding of the sensor control relay 7 with contact 7.1 and the secondary winding of the control transformer 8, the primary winding of which Included in the network 9 AC. The secondary windings of sensors 5 and 6 through the rectifiers 10 and 11 are connected to the windings of positive 12 with contacts 12.1-12.3 and negative 13 with contacts 13.1-13.3 of control relays. The motor 2 is connected by one output to the first ends of the excitation windings 3 and 4, and the other to the negative pole of the power supply 14. The second terminals of the excitation windings 3 and 4 are connected via resistors 15 and 16 to the negative pole of the power supply source 17, the positive pole of which is through the front contact 7.1 of the sensor power control relay 7, the rear contact 18.1 of the direction switch relay (the winding is not shown, the switch switches 19 and 20, respectively, of the positive and negative position of the arrow, contacts 21 and 22 of the arrow control relays of the plus and minus position of the arrow, oh, the engine, with front contacts 12.1 and V6.i of the directional control relays and with the contacts of the relay 23 auto Returns to contacts 23.1-23.4, and the rear contact 13.1 of the negative control relay is connected to the positive pole of the power supply 17 through the series-connected contacts of the auto-return relay and the auxiliary relay 24 with the contacts 24.1-24.3 and in parallel with them the auxiliary button contacts 25. Contact 13.1 of the negative control relay is connected to the rear contact 12.1 of the positive control relay, the contact of which through the winding of the auxiliary relay 24 is connected to the negative pole of the power supply 17. Front contact 23.1 and rear kyakak 23.2 auto-return relay connected to the control electrode of the thyristor 26, and front contact 23.2 and rear contact 23.1 auto-return relay to the control electrode of the thyristor 27. The thyristor anodes 26 and 27 are connected to the positive pole of the power source 14, and their cathodes through front contacts

24.2 and 24.3 of the auxiliary relay are connected to the excitation windings 3 and 4 of the electric motor 2. The rear contacts 24.2 and 24.3 of the auxiliary relay are connected to the thyristor indicator 28. The capacitor 29 through the rear contacts of minus 13.2 and positive 12.2 control relays is connected to the cathodes of thyristors 26 and 27, and through the front contacts of these same relays - to the positive pole of source 14. The winding of the autoreturn relay 23 is connected through one resistor 30 to source of power supply 17, and another output with front contacts 12.3 and

13.3 of the plus and minus control relays by contact 18.2 of the arrow track relay, with the contact 18.2 of the relay connected to the rear contacts 12.3 and 13.3 and through the contact 23.4 of the return relay to the positive pole of the power source 17. The contacts 12.3 and 13.3 of the control relays are interconnected, and the rear contact 18.2 via contact 13.1 of the switching relay is connected to the positive pole of the power supply 17.

The device works as follows.

In the normal position, if there is no translation of the arrows, the relays 21 and 22 are de-energized, the auxiliary relay 24 is turned off, the thyristors 26 and 27 are locked, the operating circuit of the switch electric drive is turned off. If the arrow is in the plc position at the same time, then the control relay 12 is energized, if the arrow is in the minus position - the negative control relay 13.

When switching the arrows from the positive position to the negative position through the contacts of the negative switch switch 20 in the manual control mode or the driving control negative switch switch 22 in the automatic mode and the front contacts of the positive switch relay 12.1, an auxiliary relay 24 excitation circuit is created. Simultaneously, through the front contacts 23.2 the autoreturn relay applies a control voltage to the control electrode of the thyristor 27.

After the auxiliary relay 24 is energized by its contacts, the control circuit of the thyristor 27 is turned on, passing through the resistor 16 from the power supply 17, after which the thyristor 27 opens and switches on the working circuit of the electric motor 2 from the source 14 through the excitation winding 4. The transfer of the arrow from the plus sign begins.

position in the minus, during which the power is turned off analog control relays 12 and 13. Through the rear contacts 12.1 and 13.1 of these relays, the self-blocking circuit of the auxiliary relay 24 passes through its own contacts

24.1 and contacts 23.3 of the auto return relay, and contacts 12.2 and 13.2 between the cathodes of thyristors 26 and 27 include a capacitor 29, the charging circuit of which passes through the open thyristor 27, contacts 24.2 of the auxiliary relay, excitation windings 3 and electric motor 2.

After the transfer of the switch to the minus position is completed, the minus control relay 13 is energized via rectifier 11, then sensor 6 and control conveyor 8 from an alternating voltage source 9. By contacts 13.2 of this relay, capacitor 29 is connected in parallel to the thyristor 27, the voltage on the capacitor is equal, but opposite to on the sign of the supply voltage of this thyristor, therefore, it closes, including the working circuit of the electric drive 1, at the same time these contacts 13.1 turn on the power supply circuit of the auxiliary relay 24, which with some slackness disables its contacts 24.1, 24.2 and 24.3 produce sparking opening operation circuit, the drive circuit to the initial state when the minus position of the arrows.

When translating the arrows from the minus position to the positive device, it works similarly, but the control circuit is switched on by switch 19 with manual control or control positive relay 21, with automatic control, relay 24 is energized through contacts 13.1 of the negative control relay, opens thyristor 26 included in the excitation winding circuit 3, its control circuit passes through the resistor 15, and the switching of the capacitor 29 at the end of the switch is carried out by the contacts 12.2 of the positive control relay.

When a foreign object hits between the frame rail and the arrow point during its transfer, the operating time of engine 2 increases and becomes longer than the normal transfer time of the arrow. In this case, the autoreturn relay 23 is turned off, the supply circuit of the winding of which, in the absence of translation, passed through the contacts 12.3 and 13.3, and when the arrow was moved this relay remained energized due to slowing down. When you turn off the relay 23 auto return it contacts 23.1 and

23.2, the thyristor control circuits 26 and 27 are switched, thus ensuring the opening of the thyristor of the opposite translation of the arrow. By recharging capacitor 29, the thyristor 26 or 27, which was previously opened for the main transfer of the arrow, is closed, and

contact 23.3 turns off the self-blocking circuit of relay 24, but this relay remains energized by slowing down. Delay time for the return of the auto return 23 and auxiliary relays

0, the relay 24 is selected such that during the course of it a full arrow can be fully completed. When the switch returns to the initial state by contacts 12.2 and 13.2 of the control relays, the capacitor 29 is switched in such a way that it is connected in parallel with the open thyristor 26 or 27 and closes it with a current of its discharge. In this case, the power supply relay circuit 23 is also restored.

Auxiliary button 25 is needed to transfer the arrow, if it did not complete for any reason during deceleration or loss of control of the arrow 24. Relay 24. When the button is pressed, auxiliary exciter relay 24 prepares both operating circuits of the switch actuator using a switch 19 and 20, the direction of translation of the arrow is selected and a turn-on circuit of the control electrode of thyristors 26 or 27 is created. At the end of the translation of the arrow to turn off thyristors 26 or 27, release button 25.

5 When one of the thyristors 26 or 27 is used, the transfer of the arrow will not take place, as the front contacts 24.2 and 24.3 of the auxiliary relay are turned on. This includes the display circuit 28, the outstanding

0 information about the state of thyristors to the on-duty electrician or operator. If the indicator 28 circuit includes control relays, whose contacts are included in the control circuit of the circuit (sequentially

5 with pins 7.1 and 18.1), in this case, the possibility of the switch of the arrow during the breakdown of one or both of the thyristors 26 and 27 is automatically excluded.

The proposed device allows

0 to transfer the switch and automatically return it to its original state, excludes long-time operation of the motor for frictional arrows, both for the forward transfer and for auto return. Switching the operating circuit of an arrow using thyristors, both when it is removed and turned off, turns on the burning of the contacts of the auxiliary relay, which increases the reliability of the device.

The proposed device can be used on the humps equipped with a hump centralization system, and can also be used for electrical centralization at stations.

Claims (1)

The invention is a device for controlling a switch actuator containing thyristors connected to an electric motor circuit connected with an anode to one of the power sources, which is connected to one of the terminals of a switching capacitor through one of the front contacts of a positive control relay, in parallel with which it is connected the first rear contact connected to the cathode of one of the thyristors, an auxiliary relay, one of the winding pins of which is connected to one of the poles of the second power source, the other output - with a different pole of a different power source through successively connected corresponding contacts of the switch handle, contacts of the switch control relays, one and the other front contacts and a relay return, in parallel with which one and the other of its rear contacts are connected, negative control relay, auxiliary button and indicator, different so that, in order to increase reliability, the power supply circuit of the auxiliary relay includes a circuit of a third return contact of the autoreturn relay, one of its own front contacts, auxiliary button contact, one of the typical contacts of the negative control relay, and another rear contact of the positive control relay, connected in series, herewith, parallel to the second and first rear contacts, respectively, of the positive and negative control relays, their second and first front contacts are connected, respectively You are connected respectively to the first and second front contacts of the auto-return relay, which are connected to the control electrodes of the mentioned thyristors, between the cathodes of which and the drive motor are connected respectively to the second and third front contacts of the auxiliary relay, in parallel to which their second and third rear contacts are connected, connected to the indicator, and between the second plate of the switching capacitor and the first power source is connected the second front contact of the minus end control relay, in parallel which is included its second rear contact connected to the cathode of the second thyristor.