RU2514540C1 - Device for controlling electric drive of railroad switch - Google Patents

Abstract

FIELD: physics; control.

SUBSTANCE: invention relates to railway automation means and telemechanics, and is meant for use in systems for controlling train and shunting operations at railway stations. The device for controlling the electric drive of a railroad switch comprises a switch point position sensor, a three-phase electric motor, auxiliary contacts, five line conductors, a resistor, a diode, dc, ac single-phase and three-phase voltage sources and switching relays.

EFFECT: high reliability and low cost of maintenance of an electric switch mechanism.

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Description

The invention relates to railway automation and telemechanics and is intended for use in control systems for train and shunting at railway stations.

A control device for a turnout electric drive is known, comprising a switch position switch point switch in the form of a switch with working and control contacts and a three-phase turnout electric drive electric motor, line wires, guard equipment for electrical centralization of arrows and signals, including a neutral start switch relay, phase control unit , auxiliary relay, polarized starting switch relay, reversing relay, common monitoring relay f, plus and minus position monitoring switches, turnout arrows, diodes, resistor, capacitor, isolation transformer and arrow buttons, station power supply, three-phase and single-phase voltage sources (RU 2074830, B61L5 / 06, B61L 19/00, B61L 23 / 14, published on March 10, 1997).

The disadvantages of the known device are both low reliability and high maintenance costs, because, firstly, it has a complex circuit, and secondly, it uses working contacts of the auto-switch for periodic switching of circuits of the electric motor of the turnout switch, which require periodic checking, adjustment and cleaning.

Also known is a control device for a turnout electric drive, comprising a switch position switch point switch in the form of a switch with working and control contacts and a three-phase turnout electric drive electric motor, line wires, guard equipment for electrical centralization of arrows and signals, including polarized and neutral starting relays, two unipolar relays for controlling the position of wits arrows turnouts, phase monitoring unit, transformer ry, diodes, capacitors, resistors, power DC, AC single-phase and three-phase voltages (RU 2396178, B61L 7/08, publ. 10.08.2010 city).

The disadvantages of the known device are also both low reliability and high maintenance costs, since, firstly, it has a complex circuit, and secondly, it uses operating contacts of the automatic switch, which require periodic checking, to switch the circuits of the electric motor of the turnout switch , adjustment and cleaning.

There is also a control device for a turnout electric drive, which contains a switch position indicator for the turnout arrows in the form of a switch with working and control contacts, a three-phase electric motor and block contacts of the turnout electric drive, five line wires connected to the switchgear for electrical centralization of arrows and signals, connected in series resistor and diode, sources of constant, alternating single-phase and three-phase voltages (Station systems aromatics and telemechanics: Textbook for universities railway transport / edited by Vl.V. Sapozhnikova. -M.: Transport, 1997, pp. 103-104, Fig. 4.29).

This device is adopted as a prototype, as closer to that proposed in its technical essence.

The disadvantage of the opposed device is also its low reliability and high maintenance costs, since it uses working contacts of the automatic switch, which require periodic inspection, adjustment and cleaning, for switching circuits of the electric motor of the turnout electric motor.

So, due to the rapid wear of the working contacts of the automatic switch of the turnout switch in routes with a traffic intensity of more than eight pairs of trains per day, the operation “Cleaning and adjusting the contacts of the automatic switch” (CCB devices. Maintenance technology. Indication No. TSShTs- 37/159 from 09.16.1999 - M: "TRANSPORT", 1999, p.128).

The task to which the present invention is directed, is to eliminate the listed disadvantages of the known control devices of the electric switch, namely improving reliability and reducing maintenance costs.

The solution to this problem is achieved by the fact that in the switchgear electric drive control device containing the switch points of the switch points in the form of a switch with working and control contacts, a three-phase electric motor and block contacts of the turnout electric drive, five line wires connected to the electrical centralization equipment arrows and signals, a resistor and a diode connected in series, sources of constant, alternating single-phase and three-phase voltage sources of direct, alternating single-phase and three-phase voltages, four switching relays are introduced, the beginning of the windings of which are connected to the first pole of the single-phase alternating voltage source, the beginning of the winding of the first switching relay is connected to the make contact of the first control contact of the witters position switch arrows turnout, the beginning of the second winding switching relay - to the make contact of the second control contact of the witches position sensor arrows of the turnout switch, on The winding of the third switching relay is to the opening contact of the third control contact of the switch position sensor of the switch points, the beginning of the winding of the fourth switching relay is connected to the opening contact of the fourth control contact of the switch position switch signals of the arrow switch, whose common contact is connected to the common contacts of the first, second, third control contacts of the witches position sensor arrows of the turnout switch, as well as to the second pole of the single-phase AC source voltage, the first line wire is connected to the common contact of the third switching relay, the rear contact of which is connected through the first block contact of the turnout electric motor to the first winding of the turnout electric motor, the second winding of which is connected through the second contact block of the turnout electric motor to the rear contacts of the fourth and the first switching relay, and the third winding to the fifth line wire, the second line wire is connected to the common contact of the fourth comm utilization relay, the front contact of which is connected to the front contact of the second switching relay and through the diode and resistor connected in series to the front contacts of the third and first switching relays, the common contact of the first switching relay is connected to the third line wire, and the common contact of the second switching relay to the fourth linear wire.

The proposed device achieved an increase in reliability and lower operating costs due to the exclusion of unreliable working contacts of the automatic switch of the turnout switch from the switching circuits of its electric motor.

The proposed technical solution is new, since the control devices of the turnout electric drive are not known in the prior art, in which four switching relays are used for switching the circuits of the electric motor of the turnout switch, the beginning of the windings of which are connected to the first pole of the single-phase AC voltage source, the beginning of the winding of the first switching relay connected to the make contact of the first control contact of the witters position sensor arrows switch a, the beginning of the winding of the second switching relay - to the make contact of the second control contact of the switch position sensor of the switch points, the beginning of the winding of the third switching relay - to the opening contact of the third control contact of the switch of switch position of the arrows arrow switch, the beginning of the winding of the fourth switching relay - to the make contact of the fourth the control contact of the witches position sensor arrows of the railroad switch, whose common contact is connected to the common contacts of the second, third, third control contacts of the witters position sensor arrows of the turnout switch, as well as to the second pole of the single-phase AC voltage source, the first line wire is connected to the common contact of the third switching relay, the rear contact of which is connected to the first winding through the first block contact of the turnout electric drive turnout electric motor, the second winding of which through the second block contact of the turnout electric drive is connected to the rear to the steps of the fourth and first switching relays, and the third winding to the fifth linear wire, the second linear wire is connected to the common contact of the fourth switching relay, the front contact of which is connected to the front contact of the second switching relay and through the diode and resistor connected in series to the front contacts of the third and the first switching relay, the common contact of the first switching relay is connected to the third line wire, and the common contact of the second switching relay is connected to the fourth linear gadfly.

The proposed technical solution has an inventive step, since for a specialist it does not explicitly follow from the prior art, which is confirmed by the above comparative analysis of the known and proposed control devices of the electric switch.

The proposed technical solution is industrially applicable, since when it is used, a technical result is obtained in the form of an increase in reliability and a decrease in the cost of its operation, and the elements introduced into it are widely known.

From the foregoing, it follows that the proposed control device of the electric switch, corresponds to the requirements of the invention.

An example of the proposed device is shown in the drawing.

The turnout electric drive control device comprises a switch position switch point switch 1 with a first 1.1, a second 1.2, a third 1.3 and a fourth 1.4 control contacts, respectively, a three-phase electric motor 2 with a first 2.1, a second 2.2, a third 2.3 stator windings and a rotor 2.4, block contacts 3.1, 3.2 of the electric motor 4 turnouts, the first 5, second 6, third 7, fourth 8, fifth 9 line wires, station equipment for electrical centralization of arrows and signals 10, resistor 11, diode 12, constant source voltage 13, a source of alternating single-phase voltage 14, a source of alternating three-phase voltage 15, the first 16, second 17, third 18, fourth 19 switching relays.

Position 20 in the drawing shows a travel box in which the switching relays 16, 17, 18, 19, resistor 11 and diode 12 are structurally placed, positions 10.1, ..., 10.5 are the terminals of the control and monitoring unit 1, as well as fuses, phases and poles of the sources power supply of the claimed device.

In the claimed device, as the station apparatus for the electrical centralization of arrows and signals 10, the well-known typical electrical centralization of intermediate stations with shunting operation ЭЦ-12-03 is used (Typical materials for designing 410305-TMP. Electrical centralization of intermediate stations with shunting operation ЭЦ-12-03. Album No. 2, p. 92. - JSC Russian Railways, GIPROTRANSSIGNALVYAZ, 2006). As switching relays 16, 17, 18 and 19, AC relay type SCHRACK RM805730 is used (Relays and starters reference book. Catalog of pulse relays and electromagnetic starters for various purposes. - www.relecat.ru)

The control device of the electric switch is depicted in the drawing in a state corresponding to the plus position of the witted arrows of the arrow, which is conventionally accepted as the source.

In this state, the third 1.3 and fourth 1.4 control contacts of the witters position sensor arrows 1 of the turnout switch 4 are closed, and the first 1.1 and second 1.2 of its control contacts are open. The third 18 and fourth 19 switching relays are on, and the first 16 and second 17 switching relays are off. As a result, in the positive position of the turnout arrow, the following control circuit is formed: terminal 10.2 of the station equipment for electrical centralization of arrows and signals 10 → second line wire 6 → common - front contacts 19.1 of the fourth switching relay 19 → resistor 11 → diode 12 → front - common contacts 18.1 of the third switching relay 18 → the first line wire 5 → terminal 10.1 of the station equipment for electrical centralization of arrows and signals 10.

In this circuit, the resistor 11 limits the value of the control current, and the diode 12 carries out its half-wave rectification. Therefore, at the terminal 10.1 of the station equipment for the electrical centralization of arrows and signals 10, there is a positive potential, which is perceived by it as the plus position of the wits of the arrow switch.

Station equipment for electrical centralization of arrows and signals 10 in this state disconnects the third 7, fourth 8 and fifth 9 line wires from the source of alternating three-phase voltage 15, that is, from the windings 2.1, 2.2 and 2.3 of electric motor 2 of electric drive 4.

To translate the arrow of the turnout switch from the positive to the minus position, the station apparatus for electrical centralization of the arrows and signals 10 forms in the third 7th, fourth 8th and fifth 9th linear wires the corresponding phase sequence of the alternating voltage phases of the source 15. The following electrical circuits for switching on the electric motor 2 of the electric drive 4 are formed turnout switch. The first circuit: terminal 10.4 of the station equipment for electrical centralization of arrows and signals 10 → the fourth line wire 8 → common - rear contact 17.1 of the second switching relay 17 → block contact 3.1 → the first 2.1 - third 2.3 of the motor winding 2 → the fifth linear wire 9 → terminal 10.5 station equipment for electrical centralization of arrows and signals 10. Second circuit: terminal 10.3 of station equipment for electrical centralization of arrows and signals 10 → third line wire 7 → common - rear contacts 16.1 of the first switching le 16 → block contact 3.2 → second 2.2 - third 2.3 motor windings 2 → fifth line wire 9 → terminal 10.5 of the station equipment for electrical centralization of arrows and signals 10.

Under the action of the voltages received in the windings 2.1-2.3, the electric motor 2 of the electric drive 4 starts to rotate in the direction corresponding to the translation of the wits of the arrow of the switch from the positive to the negative position. At the same time, at the beginning of the translation of the switch points, the third 1.3 and fourth 1.4 control contacts of the sensor 1 of the switch points of the switch arrows 4 are opened, as a result of which the third 18 and fourth 19 switching relays are switched off, breaking with their contacts 18.1 and 19.1 the control circuit of the switch points of the switch points.

After the regular completion of the translation of the wits, the arrows of the turnout switch to the minus position closes the control contacts 1.1 and 1.2 of the sensor 1 of the electric drive 4, as a result of which the first 16 and second 17 switching relays are switched on, respectively, with the contacts 16.1 and 17.1 of which the electric motor 2 of the electric motor 4 is broken. the following electrical circuit is formed to control the negative position of the wit of the arrow: terminal 10.4 of the station equipment for the electrical centralization of arrows and signals 10 → fourth th line wire 8 → common - front contacts 17.1 of the second switching relay 17 → resistor 11 → diode 12 → front - common contacts 16.1 of the first switching relay 16 → third line wire 7 → terminal 10.3 of the station equipment for electrical centralization of arrows and signals 10. Positive potential, appearing in this case at the terminal 10.3 of the station equipment for the electrical centralization of arrows and signals 10, it is perceived as the wit of the arrow of the switch in the minus position.

The arrow of the turnout switch is returned to the positive position by the command of the station equipment for electrical centralization of the arrows and signals 10, which in this case generates the corresponding phase rotation of the three-phase AC voltage source 15 in the first 5 and second 6 line wires. These voltages through the closed common - rear contacts 18.1 of the third switching relay 18 go to the first 2.1, and through the closed general - rear contacts 19.1 of the fourth switching relay 19 go to the second 2.2 winding of the electric motor 2 of the electric drive 4, respectively. The direction of rotation of the electric motor 2 of the electric actuator 4 provides for the translation of the wits of the arrow of the railroad switch from minus to plus position. At the same time, at the beginning of the translation of the wits of the arrow, the contacts 1.1 and 1.2 of the sensor 1 are turned off, the control circuit of the negative position of the wits of the arrow of the arrow is broken. Station equipment for electrical centralization of arrows and signals 10 at the time of transfer of wit arrows does not have control of their position.

After the regular completion of the translation of the wits, the arrows of the turnout switch to the positive position, the contacts 1.3 and 1.4 of the sensor 1 of the electric drive 4 are closed. At the same time, the third 18 and fourth 19 switching relays are turned on, with the contacts 18.1 and 19.1, the power supply circuits of the electric motor 2 of the electric drive 4 are broken and the above described electrical chain for controlling the positive position of wits arrows of an arrow electric drive.

This control device of the turnout electric switch, compared with the prototype, has higher reliability due to the exclusion of the contacts of the switch from the switching circuits of the electric motor of the switch, lower maintenance costs of the switch, due to the exclusion of the cleaning operations of the contacts of the switch.

Claims (1)

A switchgear electric drive control device containing a switch point switch witters in the form of a switch with working and control contacts, a three-phase electric motor and turnout switch electric motor contact blocks, five line wires connected to the switchgear and signal centralization equipment, a resistor and diode, sources of constant, alternating single-phase and three-phase voltages, characterized in that 4 switch relays, the beginning of the windings of which are connected to the first pole of a single-phase AC voltage source, the beginning of the winding of the first switching relay is connected to the make contact of the first control contact of the witters position switch arrows, the start of the winding of the second switching relay is connected to the make contact of the second control contact of the wit position sensors arrows turnout, the beginning of the winding of the third switching relay - to the NC contact of the third control the first contact of the switch position sensor of the arrow points of the arrow switch, the beginning of the winding of the fourth switching relay - to the opening contact of the fourth control pin of the switch position sensor of the points of the arrow switch, whose common contact is connected to the common contacts of the first, second, third control contacts of the switch position sensor of the switch points, and also to the second pole of the single-phase AC voltage source, the first line wire is connected to the common terminal of the third switching about a relay, the rear contact of which through the first block contact of the turnout motor is connected to the first winding of the electric motor of the turnout switch, the second winding of which through the second block contact of the electric turnout switch is connected to the rear contacts of the fourth and first switching relays, and the third winding to the fifth line wire, the second line wire is connected to the common contact of the fourth switching relay, the front contact of which is connected to the front contact of the second a switching relay and, through diode and resistor connected in series, to the front contacts of the third and first switching relays, the common contact of the first switching relay is connected to the third line wire, and the common contact of the second switching relay is connected to the fourth linear wire.