SU1184725A1 - Device for controlling locomotive reverse gear - Google Patents

Abstract

A DEVICE FOR CONTROLLING A REVERSE-MODE BOX OF A LOCOMOTIVE containing actuating relays whose contacts are included in the power supply circuit of an electropneumatic valve 15 W of a drive control, and a speed sensor, characterized in that it is equipped with thyristor switches switched on into the power circuit of each actuating relay, whose parallel-connected front contacts in the power circuit of the electro-pneumatic drive control valve are connected in series with the parallel-switched These are their rear contacts, and the control inputs of the thyristor switches are connected to the speed sensor outputs. 2.2

Description

Uf f

FIG. one

The invention relates to railway rolling stock, in particular, to automatic control systems for locomotive gears.

The purpose of the invention is to increase reliability.

FIG. 1 shows a diagram of the device; Fig. 2 shows the switching circuit of the contacts of the electromagnetic relays at the moment of switching the reverse with the locomotive stationary; fig.Z - the same, with the movement of the locomotive.

The device for controlling the reverse-mode box of the locomotive contains an electropneumatic valve 1 for controlling the drive that controls the supply of compressed air from the pressure line to the pneumatic cylinders of the reverse-box box of the locomotive (not shown). The supply voltage to the electronic fan 1 is supplied by relay 2 with contacts 2.1 and 2.2, relay 3 with contacts 3.1 and 3.2 and relay 4 with contacts 4.1 and 4.2. In this case, parallel-connected closing contacts 2.1, 3.1 and 4.1 are connected in series with parallel-connected opening contacts 2.2, 3.2 and 4.2. The windings of relays 2,3 and 4 are included in the anodic circuits of thyristors 5.6 and 7. The control electrodes of the thyristors are connected via resistors 8.9 and 10 to the output terminals 11, 12 and 13 of the gauge of the speed meter 14, kinematically connected through a reducer to the locomotive wheels (a ME 3016 speedometer sensor or similar may be taken).

When the locomotive is stationary and the speedometer sensor shaft does not rotate, three voltages can be simultaneously removed from the three output terminals of the sensor: full voltage of the on-board network, half and zero. When the locomotive moves and the speedometer sensor shaft rotates at each of the three output terminals of the sensor, the voltage changes periodically and at different points in time takes on the following values: O the network’s half voltage and the full network voltage (e.g. 14.28), and at each time point there is a combination of these voltages at the three output terminals (for example, 0.14.28 or 28, 0, 14 or 14, 28, 0).

The device works as follows. When, with a fixed locomotive, an attempt is made to switch the reverse,

through contact 15 of the mode and reverse switch, the supply voltage is applied to the control device, as a result of which two electromagnetic relays, for example, meters 2 and 3, are switched on, since the control

thyristor electrodes 5 and 6, in the anode circuit of which these relays are connected, are currently supplied from terminals 11 and 12 of the speedometer sensor 14, the full and half of the on-board network voltage and the thyristors are turned on. On the control electrode of the thyristor 7 in

 The current moment is O and it is not turned on, and therefore the relay 4 is not turned on. In this case, the closing contacts 2.1 and 3.1 of the electromagnetic relay 2 and 3 (see Fig. 2) are closed, the opening contacts 2.2 and 3.2 are open. Since the relay 4 is not turned on, its contact 4.1 is open, and the contact 4.2 is closed, the power supply circuit of electropneumatic 1 will be a whip hall. Electropneumatic valve 1 turns on -; the compressed air will open into the pneumatic cylinders and

5 the specified switch will occur.

When an attempt is made to switch while the locomotive is moving, the supply voltage is supplied to the control device also via pin 15 of the mode switch and reverse and two any thyristors are turned on (depending on the combination of voltages currently on the output terminals of the sensor 14), for example 5 and 6, and respectively two electromagnetic relays 2 and 3. When the speedometer sensor rotates, the voltage combination at its output terminals also changes on the terminal where it was equal to O (in this example, at terminal 13), turns into half e or full voltage network voltage. Thyristor 7 is switched on and on by relay 4 (contact 4.1 is closed

0 and contact 4.2 is opened. The power supply circuit of the electropneumatic fan 1 is opened (see Fig. 3), the valve is not turned on, the access of compressed air to the pneumatic cylinders is closed and switching does not occur.

FIG. 2

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Claims (1)

DEVICE FOR CONTROL OF THE REVERSE MODE LOCOMOTIVE BOX, containing actuating relays, the contacts of which are included in the power supply circuit of the electro-pneumatic valve for controlling the drive, and a speed sensor, characterized in that, in order to increase reliability, it is equipped with thyristor switches included in the power supply circuit of each actuator relays, the front contacts of which are connected in parallel in the power supply circuit of the electro-pneumatic valve for controlling the drive ovymi contacts, and the control inputs of the thyristor switches connected to the outputs of the speed sensor. h <n Ό- SU, „> 1184725