RU1795495C - Device for responding to trouble in power consumers control circuits - Google Patents

Abstract

The invention relates to the field of automation and can be used on the boreholes manufacturing engines for the conservation of the latter. The aim of the invention is to increase the reliability of the device. To do this, in a device containing a power consumer control unit, which is made up of two transistors, two optocouplers, a first and second OR element, two diodes, an emergency power off unit, which is made up of a trigger, an And element, and a first pulse counter, two sources a direct current source, an alternating current source is introduced, a second pulse counter, three NOT elements, two OR elements, two transistors, an optocoupler, are introduced into the emergency power off unit. thyristor switch, diode, indicator and button, two triggers, a third OR element, pulse counter, decoder, pulse generator, two thyristor switches, two buttons and a vacuum relay contact are introduced into the power consumer control unit. In the event of an accident, the device provides disconnection of the consumer from the AC power source and signals malfunctions. 1 ill. (L C

Description

The invention relates to the field of automation and can be used in factories manufacturing automobile engines for preserving the latter.

A device for alarming in case of violation of the normal operation of the controlled object is known. The device contains signaling elements, an executive signaling unit, an audio signaling device, a relaxer, and other elements. When the normal volume operation is interrupted, the buzzer sounds and the indicator lights flash.

It is also known a device that contains synchronization channels made of OR elements, triggers, AND elements, a single vibrator, a NOT element, an amplifier, a signal lamp, a sensor and a pulse shaper, a pulse generator, a common OR element, an audio signaling device, a control button and a signal removal button .

In the initial state, the contact of the signaling channel sensor is closed, the triggers are set to the initial state, and the signal lamp and the buzzer are disabled. When opening a contact

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The state of the triggers changes and the warning light and buzzer turn on. By pressing one of the buttons you can turn off the buzzer without turning off the warning light. After repairing the damage, the sensor contact closes, the lamp goes out and the device is ready for operation,

A prototype of the invention is a device for monitoring the operability of load circuits, which contains a pulse distributor made on a binary counter and decoder, a power supply, load elements on transistors, a program unit, charge cells, optocouplers, elements OR, AND, trigger and shaper.

At regular intervals, the program unit monitors the serviceability of the circuits of the load elements and, if it does not have a short circuit, the capacitor is charged in the charge-discharge circuit. After the end of the capacitor charge, if there is no break in the load cells, the capacitors are discharged through the input diodes of the optocoupler pairs.

The discharge current of the capacitors through the OR element is supplied to the output pulse shaper, which generates amplitude-stable signals supplied to the input of the element I.

If all load elements are serviceable, then signals from all optocoupler switches are received on the element And, which will trigger the trigger and the norm will appear on its output signal.

In the case when the signal norm is not formed, the device sequentially polls all the load elements and detects a fault.

The main disadvantage of all of the above devices is that in cyclically operating devices, the supply voltage from the actuators is not forcibly disconnected when the cycle ends, and the unit has not been disconnected due to a malfunction in the control circuit. In this case, an accident is possible. Therefore, in order to increase the reliability of the device, it is necessary to design it in such a way that, at the end of the operating cycle, power consumers would always be switched off, including in the event of a malfunction in the control circuit.

In this case, schemes for controlling the operation of power consumers and their emergency shutdown are functionally connected. But at the same time, the functional capabilities of the device increase, since it controls the operation of executive units, turns them off at the end of the cycle, forcibly disconnects the supply voltage from electrical consumers in the event of an accident, and signals an accident.

Additionally, the functionality of the device increases

due to the fact that one channel of the control circuit performs product (oil) filling, and the second channel drains it using a vacuum relay as a sensor.

Such a problem arises, for example, when

5 preservation of automobile units.

Thus, the invention pursues the following Objectives; to increase the reliability of the device by providing, at the end of the cycle, a forced shutdown of power consumers in the event of a malfunction in their control circuit; expand the functionality of the device by introducing into it a control unit for the operation of electricity consumers with channels for controlling the loading of the product (for example, oil) and draining it using a vacuum relay as a sensor, combining this circuit with electrical and logical connections with the emergency shutdown unit of consumers electricity.

This goal is achieved by the fact that in the device for responding to an accident in the power management circuit, comprising an operation control unit

5 consumers of electricity, which is made of two transistors-switches, two optocouplers, the first and second elements of OR, two diodes, an emergency power-off unit for consumers of electricity, which is made of a trigger, element And and the first pulse counter, two DC sources, in addition an alternating current source has been introduced, a second pulse counter has been introduced into the emergency power off block;

three elements NOT, two elements OR, two

. transistor switch, optocoupler thyristor switch, diode, indicator and

button, two triggers, the third element of the IL, pulse counter, decoder, pulse generator, two thyristor switches, two buttons and the contact of the vacuum relay, in the emergency power off unit, the output of the first element NOT connected to the first input of the first counter, the output of which is connected to the first input of the AND element, the output of which is connected to the first input of the first OR element, the output of which

connected to the first input of the trigger, the output of which is connected to the base of the first transistor and through the second element is NOT connected to the base of the second transistor, the collector of which is connected to the first output of the first optocoupler, the second output of which is connected to the first bus of the first DC source, the first bus of the second source the power supply is connected to the first terminal of the thyristor switch and to the first terminal of the diode, the second terminal of which is connected to the second terminal of the thyristor switch and to the third terminal of the optocoupler. the fourth terminal of which is connected to the second terminal of the second constant current source, the third terminal of the thyristor switch is connected to the first bus of the alternating current source, the emitter of the first transistor is connected to the second bus of the first constant current source and to the emitter of the second transistor, the collector of the first transistor is connected via an indicator to the first bus of the first DC source, which is connected via a button to the first input of the second OR element, the output of which is connected to the second input of the trigger, the output retego element is coupled to the second input of the AND gate, the second counter output is connected to second input of first OR. in the power consumers control unit, the first bus of the first constant current source is connected through the contact of the vacuum relay to the first input of the pulse counter and through the first and second buttons respectively to the first and second inputs of the decoder, the first output of which is connected to the first input of the first trigger, the output of which connected to the first input of the first OR element, to the base of the first transistor, the collector of which is connected to the first output of the first optocoupler, the second output of which is connected to the first bus of the first DC source, the third to the first terminal of the first thyristor switch and to the first terminal of the first diode, the second terminal of which is connected to the second terminal of the thyristor switch and to the first bus of the second DC source, the second bus of which is connected to the fourth terminal of the first optocoupler, output the first OR element is connected to the third input of the decoder, the second output of which is connected to the first input of the second trigger, the output of which is connected to the base of the second transistor, the collector of which is connected to the output terminal of the second optocoupler, the second terminal of which is connected to the first bus of the first DC source, the third to the first terminal of the second diode and to the first terminal of the second thyristor switch, the second terminal of which is connected to the second terminal of the second diode and to the first bus 5 of the second constant source current, the second bus of which is connected to the fourth terminal of the second optocoupler, the emitters of the first and second transistors are connected to the second bus of the first DC source,

0 the output of the pulse generator is connected to the second input of the counter, the first input of which is connected to the first input of the second OR element, the output of which is connected to the second input of the second trigger, the second

5, the input of the second OR element is connected to the first input of the third OR element, the output of which is connected to the second input of the first trigger, the third outputs of the first and second thyristor switches are connected to the second bus of the AC source, the output of the pulse generator, the output of the first OR, the collectors of the first and the second transistors and the output of the counter of the operation control unit of the consumers of electric power are connected respectively to the second input of the first counter, to the second input of the second element OR, to the input of the third element It is NOT for the first input of the second meter and the second input of the second meter of the emergency power off unit, the trigger output of which is connected to the first input of the third OR element, the electric power consumers control unit, the second input of which is connected to the input of the first element NOT, the emergency power off unit and is the input of the device, the fourth conclusions of the thyristor switch of the emergency power off unit and the first and second shooting gallery Reversal switch unit controlling the operation of electricity consumers are respectively the first,

5 second and third outputs of the device,

The device diagram is shown in the drawing. The device consists of an emergency power-off unit 1 and an operation control unit 2.

0 consumers of electricity, which includes common elements 3, channel A of the product loading and channel 5 of the product discharge.

Unit 1 emergency power off includes an element NOT

5 b, first 7 and second 8 counters, element Н Е 9, element И 10, elements OR 11 and 12, trigger 13. Element NOT 14, amplifier 15, optocoupler 16, thyristor switch 17, button 18, resistors 19-24, transistors 25 and 26. diode 27, LED 28, first 29 and

the second 30 buses of the first DC power supply, the first 31 and second 32 buses of the second DC power supply, the first 33 and second 34 buses of the AC power supply (220 V phase A or B or

C and phase 0).

Common elements 3 of control unit 2 include a decoder 35, an OR element 36, buttons 37 and 38, and resistors 39 and 40.

The loading channel 4 includes an OR 41 element, a trigger 42, an amplifier 43. an optocoupler 44, a thyristor switch 45, resistors 46-49, a transistor 50, and a diode 51,

Olive channel 5 includes a pulse generator 52, counter 53, OR 54 circuit, trigger 55, amplifier 56, optocoupler 57, thyristor switch 58, contact of the vacuum relay 59, resistors 60-63, transistor 64 and diode 65.;:

The drawing shows a signal log. 1 STOP, which is formed by a special scheme at the end of filling.

As amplifiers 15, 43 and 56, the integrated circuit K 561 PU 4 is used, and thyristor switches are selected as

ptmz-z MUZ .; . ; :;

In the initial state, the signal STOP log. 1, through the OR element 41, the trigger 42 is set to its initial zero state. The signal log.0 through the amplifier 43 closes the transistor 50, closes the optocoupler 44 and the thyristor switch 45 through the second output breaks the power circuit of the magnetic valve (not shown in the figure). . :: H -:.: L /; --... -; -. :;... :

Contact 59 of the vacuum relay is open. Signal log. 1 second position of the counter 53 reset trigger 55, the signal log. The output of the trigger 55 through the amplifier 56 closes the transistor 64, the optocoupler 57 is closed, and the thyristor switch 58 breaks the power supply circuit of the magnetic starter (not shown) through the third output.

Signals log, 1 from the collectors of transistors 50 in channel 4 of the loading and 64 in channel 5 of the drain are fed to circuit 1 emergency power off consumers. .Signal log. 1. from the collector of transistor150 through the element 9 closes the AND element 10 and prohibits the passage of commands through the first input of the OR element 11. The signal log. 1, the collector of transistor 64 keeps the counter 8 in its zero state at its input R and at the second output of the OR element 11 also generates a signal of log.0.

Thus, at the input S of flip-flop 13. The signal log.0i is formed, and to the zero state, flip-flop 13 is set either with the button 18, or with the signal log.1, which was present at the input R of flip-flop 13

operating time of channels 4 and 5 of filling or draining, coming from the outputs of flip-flops 42 or 55 through OR elements 12 and 36. Signal log. About the output of the trigger 13 closes the transistor

26 and LED 28 is not lit. The same signal is also fed to the input of the element NOT 14 and through the amplifier 15 opens the transistor 25. The optocoupler 16 is opened, voltage 31 is applied to the winding of the thyristor relay

0 of switch 17, a symmetric thyristor is opened in it and phase A (B, C) of voltage 220 V AC (in the figure pos. ЗЗ) through the first output of the device goes to one of the inputs of the magnetic valve 5 on and the starter, preparing them for operation ( not shown in the figure).

The loading channel 4 is switched on by button 37. The signal is a log. G goes to the first input of the decoder 35 and from its first output

0 cocking trigger 42. Signal log. 1, from the output of the trigger 42 through the OR element 36, the decoder 35 is blocked by the third input and through the OR element 12 at the input R of the trigger 13 confirms its zero state.

5 Signal log. 1 from the output of the trigger 42 and enters the input of the amplifier 43 and through it opens the transistor 50. The optocoupler 44 is opened, the DC voltage 31 is supplied to the thyristor relay coil

0 of the switch 45, the symmetric thyristor in the switch 45 is opened and through it the second input of the magnetic valve is connected to the phase 0 of the voltage 220 V AC. Product loading begins.

5 With the end of the product filling by a special circuit (not shown in the figure), a STOP log signal is generated. D. This signal is fed to the inputs of the OR 41 element and NOT 6. The OR element 41 will

0 flushed trigger 42 and signal log. On its output, through the amplifier 43, it closes the transistor 50, the optocoupler 44 closes, the relay coil of the transistor switch 45 de-energizes, and the symmetrical one closes

5 thyristor in switch 45 and through the second output of the device from the magnetic valve phase 0 of voltage 220 V AC will be disconnected. Product loading stops. In this case, the signal log. 1 at the collector of transistor 50 through the element NOT 9 will form a signal log. About on one of the inputs of the element And 10.

Counter 7 is used as a circuit to generate a signal delay over time.

Signal STOP log. 1, entering the input of the element NOT 6. generates at its output and input R counter 7 signal log. A. Clock pulses from the pulse generator 52. entering the input CE of the counter 7, change it

state one to eight. Signal log. 1 from the fourth position, delayed in time, enters the input of the And 10 element, however, a log signal is already present at the second input of the And 10 element. About and at the output of the element And 10 the signal log, O will remain formed. The state of the trigger 13 will not change.

In the event of a malfunction in the control circuit, the transistor 50 will not close and a log signal will be stored on its collector. A. This signal through the element NOT 9 on one of the inputs of the element And 10 will allow a log when a signal arrives. 1 from the output of the fourth position of the counter 7 signal generation log. 1 at the output of the element And 10, which is triggered by the element S through the input OR 11 at the input S. Signal log. 1 from the output of the trigger 13 will open the transistor 26 and the LED 28 will alarm. The same signal through element HE 14 and amplifier 15 will close the transistor 25, the optocoupler 16 will close, and eventually the symmetric thyristor of the thyristor switch 17 will close, and the voltage phase A (B, C) will be disconnected from the magnetic valve and the magnetic starter 220 V of alternating current.

Signal log. 1, from the output of trigger 13, it enters both the inputs of the OR elements 41 and 54 and through these elements OR the inputs R of the triggers 42 and 55, setting them to the initial zero state.

Drain channel 5 is activated by button 38. Logic 1 is supplied to the second input of decoder 35 and logic 1 from the second output of the decoder cocks the trigger 55. The same signal from the output of trigger 55 through the OR element 19 at the third input of the decoder 35 blocks it, preventing the operator from interfering into the operation of the circuit, and confirms the initial zero state of the trigger 13. The logical 1 signal from the output of the trigger 55 through the amplifier 56 opens the transistor 64, the optocoupler 57 and the symmetric thyristor in the thyristor switch 58 are opened, connected through thirds Output device second terminal of the magnetic actuator with 0 phase voltage of 220 V AC.

Product draining begins, a vacuum is established in the system from which the product is drained, and the vacuum relay closes its contact 59, setting Counter 53 to the zero state.

When product draining ends, the vacuum in the draining system ceases, contact 59 opens, and the clock pulses from pulse generator 52 begin to sequentially change the positions of counter 53.

Logic 1 signal from the second position

counter 53 entering through the element OR 54

. at the input R of the trigger 55. it will set it to zero state 5.

The logical O signal from the output of the trigger 55 through the amplifier 56 will close the transistor 64, the optocoupler 57 and the symmetric thyristor in the thyristor switch 58 will be closed. 10 At the same time, the phase O voltage 220 V AC is disconnected from the magnetic starter through the third output of the device and the product drains off.

Logic signal 1 from collector 5 of transistor 64 at input R keeps counter 8 in the zero state. Therefore, when a time-delayed log signal arrives at its CE input. 1, formed at the output of the fourth position of the counter 53, 0, the state of the counter 8 will not change.

In the event of a malfunction in the control circuit, the transistor 64 will not close and a log signal will remain on its collector. O formed during the discharge of the product. This 5 signal, arriving at the input R of counter 8, will allow changing its state along the CE path by the log signal. T formed at the output of the fourth position of the counter 53.

Counter 8 is set to the first position, and the signal is log. 1 since its release through

element IL AND 11 cocked trigger 13. Signal

Log. 1 from the output of trigger 13 goes to

the base of the transistor 26 and the input of the element is NOT 14.

The admission to the base of transistor 26, sig5 nal log. T from the trigger output 13, opens

transistor 26 and LED 28 lights up

CRASH.

The signal log.O, formed at the output of the element NOT 14, when the signal log came to its input 0. T from the output of the trigger 13, through the amplifier 15 closes the transistor 25, the symmetric thyristor in the thyristor switch 17 is closed, and through the first output of the device, the phase A (B, C) of voltage 220 V AC is disconnected from the magnetic valve 5 and the starter.

Thus, the emergency power off circuit in the event of an accident in the control circuit disconnects the voltage of 220 V AC from the consumers of electric energy and signals a malfunction.

The operator has the ability to reset the circuit using the 5th button 19.

The proposed device was developed by SKTB NPO refueling equipment and was tested with a positive result.

Claims (1)

SUMMARY OF THE INVENTION A device for responding to an accident in a power consumer control circuit comprising a power consumer control unit, which is made up of two transistors, two optocouplers, a first and second OR element, two diodes, an emergency power off unit that is configured of a trigger, AND elements, and a first pulse counter, two direct current sources, characterized in that. in order to increase the reliability of the device, an alternating current source was introduced into it, and a second pulse counter, three NOT elements, two OR elements, were introduced into the emergency power off unit. two transistors, an optocoupler, a thyristor switch, a diode, an indicator and a button, in the power consumer control unit — two triggers, a third OR element, and a pulse counter. decoder, pulse generator, two thyristor switches, two buttons and a vacuum relay contact, in the emergency power off unit, the output of the first element is NOT connected to the first input of the first counter, the output of which is connected to the first input of the And element, the output of which is connected to the first input of the first OR element, the output of which is connected to the first input of the trigger, the output of which is connected to the base of the first transistor and through the second element is NOT connected to the base of the second transistor, the collector of which is connected nen with the first output of the first optocoupler, the second output of which is connected to the first bus of the first DC source, the first bus of the second DC source is connected to the first output of the thyristor switch and to the first output of the diode, the second output of which is connected to the second output of the thyristor switch and to the third terminal of the optocoupler, the fourth terminal of which is connected to the second terminal of the second DC source, the third terminal of the thyristor switch is connected to the first bus of the AC source, the first transistor’s mitter is connected to the second bus of the first constant current source and to the emitter of the second transistor, the collector of the first transistor is connected via an indicator to the first bus of the first constant current source, which is connected via a button to the first input of the second element. OR, the output of which is connected the second trigger input, the output of the third element is NOT connected to the second input of the AND element, the output of the second counter is connected to the second to the input of the first OR element, in the power consumer control unit, the first bus of the first constant current source is connected through the contact of the vacuum relay to the first input of the pulse counter and through the first and second buttons respectively to the first and second inputs of the decoder, the first output of which is connected to the first input of the first a trigger whose output is connected to the first input of the first OR element, to the base of the first transistor, whose collector is connected to the first output of the first optocoupler, the second output of which is connected is connected to the first bus of the first DC source, the third to the first terminal of the first thyristor switch and to the first terminal of the first diode, the second terminal of which is connected to the second terminal of the thyristor switch and to the first bus of the second DC source, the second bus of which is connected to the fourth the output of the first optocoupler, the output of the first OR element is connected to the third input of the decoder, the second output of which is connected to the first input of the second trigger, the output of which is connected to the base of the second transistor, collectively which is connected to the first output of the second optocoupler, the second output of which is connected to the first bus of the first DC source, the third to the first output of the second diode and to the first output of the second thyristor switch, the second output of which is connected to the second output of the second diode and to the first bus of the second a constant current source, the second bus of which is connected to the fourth terminal of the second optocoupler, the emitters of the first and second transistors are connected to the second bus of the first constant current source, the output of the pulse generator owl is connected to the second input of the counter, the first output of which is connected to the first input of the second OR element, the output of which is connected to the second input of the second trigger, the second input of the second OR element is combined with the first input of the third OR element, the output of which is connected to the second input of the first trigger, third the outputs of the first and second thyristor switches are connected to the second bus of the AC source, the output of the pulse generator, the output of the first OR element, the collectors of the first and second transistors and the output of the counter bl Single controlling the operation of electricity consumers are connected respectively to the second input of the first counter to the second input of the second OR gate, to the third input of NOT circuit, to the first input of the second counter and the second input of the second counter block emergency shutdown power consumers. the trigger output of which is connected to the first input of the third element AND of the electric power consumer control unit, the second input of which is connected to the input of the first element NOT of the emergency power off unit and is the input of the device, the fourth terminals of the thyristor switch of the emergency power off unit and the first and second thyristor switches of the electric power consumer control unit are respectively the first, second and third outputs stroystva.