RU2396178C1 - Device to control switch electric operating apparatus and device to control coupled switch electric operating apparatuses - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to railroad signaling, centralisation and interlocking (SCI). Device to control switch operating apparatus comprises electric drive with three-phase motor, neutral starting relay connecting one output of on one switch control one-pole relay winding with one line conductor. Connected in parallel to starting relay open contact. Another resistor is connected in parallel to neutral starting relay close contact connecting the other output of one switch control one-pole relay winding with the other line conductor. Note here that one output of three-phase motor connected in series with one line conductor is connected via neutral starting and polarised relay with one phase of three-phase AC source via one capacitor. Another output of three-phase motor windings is connected with parallel-connected open-and-close control contacts of automatic switch and to another phase of AC source. Third output of three-phase motor winding is connected in series by third line conductor by close contacts of neutral and starting polarised relay with AC source third phase via third capacitor. Note also that open contact of one switch control relay is connected in series to neutral starting relay connection winding.

EFFECT: higher reliability and increased range of control.

2 cl, 2 dwg

Description

The invention relates to the field of electrical engineering and can be used in signaling, centralization and blocking devices (SSC) in railway transport.

A control device for a turnout electric drive is known, comprising three line wires, an electric drive with a three-phase electric motor and an automatic switch with monitoring and working contacts, polarized and neutral starting relays, an arrow monitoring relay, an arrow position monitoring relay, a phase monitoring unit with terminals for connecting one, another and third phases three-phase alternating current, with one, another and third terminals for connecting a three-phase load and terminals for connecting relays, transformers, diodes, capacitor , Resistors, sources of DC, AC or three-phase alternating currents (cm. 1).

The disadvantages of this device are:

- low reliability due to the fact that when reversing the linear wires it is possible to obtain false control of the position of the arrow;

- high cost due to the use of an additional polarized start relay.

There is also known a control device for a turnout electric drive, containing three linear wires, an electric drive with a three-phase electric motor and an automatic switch with control and working contacts, a floor reversing relay, a polarized and neutral start-up relay, one and the other unipolar arrow control relays, an arrow position control relay, a phase control unit with conclusions for connecting one, another and third phases of a three-phase alternating current, with one, other and third conclusions for connecting a three-phase load and you odes for connecting relays, transformers, diodes, capacitors, resistors, sources of DC, AC or three-phase alternating currents (see. 2, page 8, lines 9-17).

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

The disadvantages of the opposed device are low reliability and high cost due to the use of floor reversing relay.

The problem to which the present invention is directed, is to eliminate the above disadvantages of the known control devices of the electric pointer.

The solution to this problem is achieved by the fact that parallel to one NC contact of the neutral start relay connecting one output of the working winding of one unipolar relay control arrows with one line wire, one resistor is connected, parallel to the other NC of the neutral start relay connecting the other output of the working winding of one unipolar relay control arrows with another linear wire, another resistor is connected, while one terminal of the windings of a three-phase electric motor is connected, a follower is connected but with one line wire, one make contact of the neutral start relay, one closed contact of the start polarized relay, one output of the phase control unit for connecting the three-phase load, one output of the phase control unit for connecting the phase of the three-phase alternating current connected to one phase of the three-phase alternating current source through one capacitor and the other output of the windings of a three-phase electric motor through another capacitor is connected to a parallel connected open and closed control To the contacts of the circuit breaker and through another line wire it is connected in series with another NO contact of the neutral start relay, another output of the phase monitoring unit for connecting the three-phase load, another output of the phase monitoring unit for connecting the phase of the three-phase alternating current and connected to another phase of the three-phase alternating current source, and the third output windings of a three-phase electric motor is connected in series with a third linear wire, a third making contact of a neutral starting relay, another closed contact of the starting polarized relay, the third terminal of the phase monitoring unit for connecting the three-phase load, the third terminal of the phase monitoring unit for connecting the phase of the three-phase alternating current and is connected to the third phase of the three-phase alternating current source through the third capacitor, while in the connection circuit of the winding of the neutral starting relay with terminals for connecting the phase monitoring unit relay, the NC contact of one arrow monitoring relay is connected in series.

In the proposed device, an increase in reliability and cost reduction due to the exclusion of the floor reversing relay is achieved.

The proposed technical solution is new, because from the prior art there are no control devices for an electric switch, in which one resistor is connected in parallel to one normally open contact of the neutral start relay connecting one output of the working winding of one unipolar arrow control relay with one line wire, and another is connected to the other neutral contact of the neutral start relay connecting the other output the working winding of one unipolar relay control arrows with another linear wire, another resistor is connected, while one terminal of the windings t an e-phase electric motor connected in series with one line wire, one make contact of a neutral start relay, one closed contact of a start polarized relay, one output of a phase monitoring unit for connecting a three-phase load, one output of a phase monitoring unit for connecting a phase of three-phase alternating current is connected to one phase of a three-phase alternating current source current through one capacitor, and the other output of the windings of a three-phase electric motor through another capacitor is connected to the parallel wired open and closed control contacts of the circuit breaker and through another line wire connected in series with another make contact of the neutral start relay, another output of the phase monitoring unit to connect the three-phase load, another output of the phase monitoring unit to connect the phase of the three-phase alternating current and connected to another phase of the source of the three-phase alternating current current, and the third output of the windings of a three-phase electric motor is connected in series with the third linear wire, t a third closing contact of the neutral starting relay, another closed contact of the starting polarized relay, the third terminal of the phase monitoring unit for connecting the three-phase load, the third terminal of the phase monitoring unit for connecting the phase of the three-phase alternating current and is connected to the third phase of the three-phase alternating current source through the third capacitor, while in the circuit connection of the winding of the neutral starting relay with the terminals for connecting the relay of the phase monitoring unit, the disconnecting circuit is connected in series ie one arrow control relay.

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

The proposed technical solution is industrially applicable, because when using it, a technical result is obtained in the form of an increase in reliability and a decrease in cost due to the exclusion of the floor reversing relay.

From the above it follows that the proposed technical solution meets the requirements of the invention.

An example of an embodiment of the proposed control device for a single switch electric drive is shown in FIG.

Figure 2 shows a variant of the device shown in figure 1 for the case of controlling twin arrows.

The control device circuit of a single arrow electric drive (see Figure 1) contains control contacts 1 and 2, double-wound starting polarized 3 and neutral 4 relays with their contacts, respectively 3.1, 3.2, 3.3, 3.4 and 4.1, 4.2, 4.3, 4.4, one unipolar relay for monitoring arrows 5 with working 5.1 and polarizing 5.2, 5.3 windings and its contacts 5.4, 5.5, 5.6 and another unipolar relay for monitoring arrows 6 with working 6.1 and polarizing 6.2, 6.3 windings and its contacts 6.4, 6.5 relay for controlling positive position of arrow 7 Relay for monitoring the negative position of arrow 8, ontacts of switch track 9 and closing relay 10 (these relays are not shown in the diagram), transformer 11 with secondary 11.1, 11.2 windings, phase monitoring unit 12 with transformers 12.1, 12.2, 12.3 and terminals 12.1.1, 12.2.1, 12.3.1 for connecting respectively one, another and third phases of the three-phase AC source with leads, leads 12.1.2, 12.2.2, 12.3.2 for connecting a three-phase load, a rectifier 12.4 and leads 12.4.1, 12.4.2 for connecting a relay, an electric drive 13 with control 13.1 contacts of the auto switch and three-phase electric motor 13.2, linear wire 14, 15, 16, diodes, 17, 18, 19, capacitors 21, 22, 23, 24, 25, 26, 27, resistors 28, 29, 30, 31, 32, 33, 34, relay power supply “+” , “-”, three-phase alternating current source 35, alternating current source 36.

The device of Fig. 2, in addition to that indicated in Fig. 1, contains the operating contacts of the automatic switch 13.3 on the electric drive 13 mounted on one paired arrow, the electric drive 37 mounted on the other twin arrow and containing the control 37.1, the working 37.3 contacts of the automatic switch and the three-phase electric motor 37.2, and diode 38 and resistors 39, 40.

The device of Fig. 1 is shown in the normal state of control of the positive position of the arrow, while from the winding 11.1 of the transformer 11 through the resistor 30 to the windings 5.1, 6.1 and through the disconnecting contacts 4.2, 4.3, 4.4 to the linear wires 14, 15, 16 and connected to them through the normally closed control contacts of the switch 13.1 diode 19, the AC voltage from the AC source 36 is supplied, which is rectified by the diode 19, and the polarity of the rectified voltage coincides with the polarity of the voltage supplied through the closed the first contact 3.4 from the rectifier 20 through the relay coil 7 and the make contacts 5.4, 6.4 to the windings 5.2, 6.2, which makes the relays 5, 6 and 7 excited.

The excited state of the relay 7 captures the positive position of the arrow.

To move the arrow from the positive to the minus position, pin 2 switches, which causes relay 4 to be activated along the circuit: “+”, closed contact 1, switched contact 2, closed contact 3.1, relay coil 4, make contacts 9, 10, “-”, which the make contacts 4.2, 4.3, 4.4 will connect to the line wires 14, 15, 16 and the three-phase electric motor 13.2 a source of three-phase alternating current 35 with an unchanged sequence of phase rotation, so the switch will not occur.

The make contact 4.1 will create a relay 3 response circuit: “+”, closed contact 1, switched contact 2, relay coil 3, diode 17, make contact 4.1, make contacts 9, 10, “-”.

Relay 3 by switched contact 3.1 will disconnect the excitation circuit of relay 4, and by switched contact 3.4 it will connect windings 5.3, 6.3 to rectifier 20 through opening contact 6.5 and resistor 29.

The switched contacts 3.2, 3.3 will change the phase sequence of the three-phase alternating current source 35 in the linear wires 14, 16, which is why the three-phase electric motor 13.2 will begin to turn the arrow to the negative position.

At the beginning of the translation of the arrow, contacts 13.1 will open and disconnect the diode 19 from the linear wires 14, 15, 16, why the DC power to the windings 5.1, 6.1 and relays 5 and 6 will stop releasing their anchors and by closing contacts 5.4, 6.4 they will turn off the power to relay 7.

Relay 7 will release its anchor, which will stop monitoring the positive position of the arrow.

Under the influence of transformers 12.1, 12.2, 12.3 flowing through the primary windings and, respectively, through the terminals 12.1.1, 12.1.2, 12.2.1, 12.2.2 and 12.3.1, 12.3.2 of the operating current of the electric motor 13.2, the voltage in the secondary windings of these transformers through rectifier 12.4, terminals 12.4.1, 12.4.4 and NC contact 5.6 to the coil of relay 4, which is why this relay holds the armature in the pulled position for the entire time the arrow is turned.

After the translation of the arrow into the negative position is completed, the switched control contacts 13.1 will change the polarity of the diode 19 to the linear wires 14, 15, 16. Since the polarity of the connection of the diode 19 to the linear wires 14, 15 corresponds to the polarity of the power supply to the winding 5.3, then the relay 5 is excited under the influence of the source voltage 35 rectified by the diode 19 through the resistors 33, 34 and the disconnect terminal 5.6 will turn off the power supply circuit of the relay winding 4, why this relay will release its anchor and by closing contacts 4.2, 4.3, 4.4 will disconnect the power of electric motor 13.2 from source 35, and by opening contacts 4.2, 4.3 it will shunt resistors 33, 34 and provide power to windings 5.1, 6.1 and diode 19 from skeins 11.1 transformer 11 via a resistor 30.

Relays 5 and 6 are energized from a DC source 20 through a resistor 29 and a normally open contact 6.5 and are self-locked through the coil of relay 8 and make contacts 5.5, 6.5, which makes relay 8 also energized and thereby fix the negative position of the arrow.

Capacitors:

- 21, 22 - exclude the closure of the DC component of the current through the winding of the transformer 11.1;

- 23, 24 - exclude the closure of the DC component of the current through the windings of the transformer of the source of three-phase alternating current 35;

- 25 - eliminates the closure of the DC component of the current through the windings of a three-phase electric motor 13.2;

- 26, 27 - provide self-locking of relays 5, 6 through NC contacts 6.4, 6.5.

Resistors:

- 28, 29 - set the operation mode of the relay 5, 6;

- 30 - protects the transformer 11 in the event of a short circuit of the linear wires;

- 31, 32 - provide the operation mode of the relay 5, 6 for direct current;

- 33, 34 - provide the specified mode of influence of the voltage of the source of three-phase alternating current 35 on the relay 5.

Variants of the proposed device with powering the windings 5.2, 5.3, 6.2, 6.3 not from a separate winding of the transformer 11 and rectifier 20, but from the power supply of the relay "+", "-", as well as with a serial connection of the windings 5.2, 6.2 and 5.3 , 6.3 instead of parallel.

In the case of a voltage value of a three-phase alternating current source that is acceptable for the operation of the working winding of 5.1 relay 5, a variant of the device of Fig. 1 is possible without resistors 33, 34, but in this case, one and the other leads of the winding 5.1 are connected to the line wires 14, 15 not through the disconnecting contacts 4.2, 4.3, and directly respectively to the linear wires 14, 15.

In the proposed device there is no floor reversing relay, which reduces its cost and increases reliability.

In addition, the inclusion in series with the windings of the three-phase electric motor 13.2 of the capacitors 23, 24, 25 in the proposed device allows to reduce the working current of this electric motor by compensating for the reactive component of its current and thereby increase the control range of the switch electric drive due to the reduction of voltage drop in the linear wires.

The work to control the normal positive position of the paired arrows of Figure 2 is carried out similarly as described for a single arrow of Figure 1 with the difference that the diode 19 is connected to the linear wire 15 through the normally closed series-connected control contacts of both paired arrows, and the resistors 31, 32 are connected to linear wires 14, 16, respectively, also through normally closed series-connected control contacts of both paired arrows.

The translation of the paired arrows of FIG. 2 from the positive to the minus position is also carried out similarly to that described for FIG. 1 with the difference that after the relay 3 is activated, the voltage from the source 35 with a changed phase sequence comes from the linear wires 14, 15, 16 through normally closed working the contacts of the auto switch 37.3 to the three-phase electric motor 37.2, why the electric drive 37 will put another twin arrow in the negative position, while the control of the positive position of the arrow will cease at the beginning of its translation due to opening to control contacts 37.1.

After completing the transfer to the minus position of the other twin arrows and switching contacts 37.1, a circuit will be prepared for connecting the diode 38 and resistors 39, 40 to the linear wires 14, 15, 16, and the voltage from the linear wires 14, 15, 16 will go to the three-phase electric motor 13.2, which makes the electric drive 13 will translate one paired arrow to the negative position, while at the beginning of its transfer the control contacts 13.1 will open and disconnect the source 35 from the three-phase electric motor 37.2, and also additionally break the connection circuit of the diode 19 to the linear wire 1 5.

After completing the transfer to the negative position of one paired arrow, the control contacts 13.1 will switch, which will cause the connection circuit of the diode 38 and resistors 39, 40 to the linear wires 14, 15, 16. to be closed. the polarity of the connection of the diode 38 to the linear wires 14, 15 corresponds to the polarity of the power supply to the winding 5.3, then the relay 5 is energized and the NC contact 5.6 will turn off the power of the relay 4.

Relay 4 will release its anchor and with make contacts 4.2, 4.3, 4.4 disconnect source 35 from the three-phase electric motor 13.2 in the same way as described for FIG. 1.

Relays 5 and 6 are energized from a DC source 20 through a resistor 29 and a normally open contact 6.5 and are self-locked through the relay coil 8 and make contacts 5.5, 6.5, which makes relay 8 also energized and thereby fix the negative position of the paired arrows.

The subsequent return of the paired arrows to the positive position will occur similarly and will begin with the electric drive 13.

The economic effect of the proposed device for controlling a turnout electric drive can be characterized by the following indicators:

- increased reliability due to the lack of a floor reversing relay in the device;

- cost reduction due to the lack of a floor reversing relay in the device;

- an increase in the control range of the switch electric drive due to a decrease in the operating current of a three-phase electric motor due to compensation by the capacitors of the reactive component of its power.

Literature

1. USSR author's certificate SU No. 1303474 A1, cl. B61L 7/08, published April 15, 87, Bull. Number 14.

2. Russian patent RU 2278043 C2, IPC B61L 7/08, published June 20, 2006, Bull. Number 17.

Claims (2)

1. A control device for a turnout electric drive, containing three line wires, an electric drive with a three-phase electric motor and an automatic switch with control and working contacts, polarized and neutral start-up relays, one and the other unipolar arrow control relays, an arrow position control relay, a phase control unit with leads for connecting one , another and third phases of three-phase alternating current, with one, another and third terminals for connecting a three-phase load and terminals for connecting relays, transformers, diodes, capacitors, resistors, sources of direct, alternating and three-phase alternating currents, characterized in that one resistor is connected in parallel with another disconnecting contact in parallel to one opening contact of the neutral start relay, connecting one output of the working winding of one unipolar relay control arrows with one linear wire a neutral starting relay connecting the other output of the working winding of one unipolar relay control arrows with another linear wire, another resistor is connected p, with one terminal of the windings of a three-phase electric motor connected in series with one line wire, one NO contact of the neutral starting relay, one closed contact of the polarized starting relay, one terminal of the phase monitoring unit for connecting the three-phase load, one terminal of the phase monitoring unit for connecting the phase of the three-phase alternating current connected to one phase of a three-phase AC source through one capacitor, and the other output of the windings of a three-phase electric motor through another The capacitor is connected to the parallel open and closed control contacts of the circuit breaker and, through another line wire, is connected in series with another make contact of the neutral start relay, another output of the phase monitoring unit to connect the three-phase load, another output of the phase monitoring unit to connect the phase of the three-phase alternating current and connected to another phase of the source of three-phase alternating current, and the third output of the windings of a three-phase electric motor is connected to a follower о with a third line wire, a third closing contact of a neutral starting relay, another closed contact of a starting polarized relay, a third terminal of a phase monitoring unit for connecting a three-phase load, a third terminal of a phase monitoring unit for connecting a phase of a three-phase alternating current and is connected to a third phase of a three-phase alternating current source through a third a capacitor, while in the connection circuit of the winding of the neutral starting relay with the terminals for connecting the phase-monitoring relay flax switched NC contact of the relay control arrows. 2. A control device for paired switch actuators containing three linear wires, one and the other paired actuators with three-phase electric motors and auto-switches with monitoring and working contacts, polarized and neutral starting relays, one and the other unipolar arrow monitoring relays, arrow position monitoring relays, phase monitoring unit with terminals for connecting one, another and third phases of a three-phase alternating current, with one, other and third terminals for connecting a three-phase load Amps for connecting relays, transformers, diodes, capacitors, resistors, sources of direct, alternating and three-phase alternating currents, characterized in that one and the other end of the series-connected one of two resistors are connected respectively through one pair of series-connected closed control contacts of the automatic switch of one and the other paired arrow to the first and third linear wires, while the output of one polarity of one diode is connected to the connection point between these two resistors s, and the output of the other polarity of this diode through other series-connected closed control contacts of the auto-switch of both paired arrows is connected to the second line wire, and one and the other ends of the series-connected other two resistors are connected respectively through one pair of series-connected open control contacts of the auto-switch of one and the other paired arrow to the first and third linear wires, while the output of the other polarity of the other diode is connected to the point of connection eniya together these other two resistors, and the output of one polarity of this diode connected in series through the other control-open contacts avtopereklyuchatelya both paired arrows connected to the second line conductor.

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