SU1283708A1 - Control device for working member - Google Patents

Abstract

The invention relates to automation and can be used to automate technological processes of power generation, as well as in the chemical industry, etc. mainly in systems with higher reliability requirements for tripping. The aim of the invention is to expand the field of application of the device, and increase its reliability by backing up, reducing the recovery time and increasing maintainability. The device for controlling the executive body consists of drivers of the first, second, and third commands, a signal generator, a combination of OR elements, two time relays, two triggers, seven AND elements, and four power amplifiers. New in the device is the introduction of two OR elements, a time relay, two triggers, five AND elements, two power amplifiers, an input terminal, a device, and an output terminal of a device. 1 il.

Description

The invention relates to automation and can be used to automate technological processes of power generation, in the chemical industry, etc. mainly in systems with increased reliability requirements for triggered.

The purpose of the invention is to expand the field of application of the device and increase its reliability by backing up, reducing the recovery time and increasing maintainability.

The drawing shows a functional diagram of the device.

one

The device contains a driver. the first command, the driver 2 position signals, the command block 3, the driver 4 of the second command, the driver 5 of the third command, the first and second power amplifiers 6. and 7, the executive body 8, the information block 9, the first element OR 10, the first time relay 11, The first and second elements are AND 12 and 13, the second element is OR 14, the second time relay is 15, the first and second triggers are 16 and 17, the third, fourth, fifth, sixth and seventh elements are AND 18-22, the third and fourth elements are OR 23 and 24 and third and fourth power amplifiers 25 and 26,

Shaper 1 of the first command contains the eighth element And 27, the fifth element And 28 and the third trigger 29.

The third command shaper 5 contains the sixth element OR 30, the de AND element 31, the fourth trigger 32, the second command shaper 4 contains the seventh element OR 33, the tenth and eleventh elements 34, 35. The shaper 2 position signals contain the twelfth, three the fifteenth, fourteenth and fifteenth elements AND 36-39, the eighth and ninth elements OR 40, 41 and the generator 42 of rectangular pulses.

In addition, the device contains input terminals 43, 44, 45 and output terminal 46.

The device works in the following way.

If there is a signal from the corresponding limit switch (not shown) about the state of the actuator 8, for example, Closed, at the input terminal 44 of the device by the element

five

0

five

And -39 of the position signal generator 2, the signal of the state of the actuator 8 is generated, which is fed to the information unit 9.

In the case of input from the control command unit 3 Open to the input of the element And 27 of the driver 1, a signal appears at the output of this element, which is recorded in the trigger 29, from the direct output of the trigger 29 a command is sent to the first power amplifier 6 (where is amplified and supplied to the executive authority 8) and to the input of the first element OR 10, which leads to the start of time relays 11 and 15, with the first time relay 11 being set to a time twice as long as the countdown time of the second time relay 15. In case of being perceived by the executive body 8 of this command, it moves in the Open direction, which is accompanied by the formation in the shaper 2 of the position signaling signal of the movement of the executive body 8, by closing the element 37 and opening the element 36, as a result of which information is sent to the information block 9. Coal pulses from the generator 42 through the element OR 40. In the normal course of the control process, the executive body 8, when it moves, comes off the limit switch Za-5 down, which ensures

On the first and third elements, And 12, 18 prohibitions, and when closing the limit switch of the Open (not shown) position through the OR 28 element, the trigger 29 of the driver 1 is reset in input 43, which causes a change in the signaling of the position of the actuator 8. At the same time, the element closes And 36 and opens And 37 and at the output of the driver 2 position signals, a constant signal appears through the element OR 40.

0 If the executive body 8 did not receive the command, then after a time delay the time relay 15 (providing sufficient time for the executive body to go

5s of the limit switch) and the presence of a signal at the forward output of the trigger 29 of the driver 1 at the output of the third element 18 appears a signal that through the third element OR 23

0

0

five

is written to the second trigger 17, from the output of which, through the fifth element I 20 and the third power amplifier 25, the command is repeatedly sent to the executive body 8. If the executive body 8 receives the second command, the device operates as described above and when the time expires time 11 through the seventh element And 22 on the output - output 46 is signaled alarm - reduced reliability of the device, which can be applied to the display element, for example the led (not shown

In case of failure, the executive body 8 of the second command and counting the time delay, the first relay of time 11 at the output of the first element AND 12 appears a signal which is written to the first trigger 16 via the second element OR 14 which is banned. the third and fourth elements

and 18, 19, and from the direct output, the alarm is transmitted to the third input of the information block 9 External circuit malfunction and after a quarter OR element 24 reset of the second trigger 17. When troubleshooting alarm malfunctions, the device’s low reliability and external circuit malfunction can be reset by applying a signal to the third input terminal 45 of the device from the switching element, for example a button (not shown).

When the Close command appears, the operation of the device proceeds in a similar way.

Alarms The low reliability of the device and the malfunction of external circuits make it possible to judge the location of the malfunction when the executive body fails to perform the control actions of the information command unit. Signaling Decreased reliability of a device means a malfunction in the device itself (the first command is not perceived by the executive body, but the second is perceived), and alarms the malfunction of external circuits is a malfunction of the actuator, limit switches or the communication line commands is unlikely). Considering that control devices

the executive bodies are often located at a considerable distance from the executive body itself, then the determination of the fault finding area significantly affects the reduction of the recovery time and the increase in maintainability of the control devices as a whole.

Claims (1)

Invention Formula A device for actuating the actuator containing a shaper of the first command, the first input of which is connected to the first input of the position signal generator, the second input - with the first output of the command block and the first input of the second command generator, the third input - with the second input of the position signal generator and the first output the third command driver, the fourth input — with the output of the second command driver and the first input of the third command driver; the first output of the first command driver is connected to the second m input of the second command generator, with the third input of the position signal generator and through the first power amplifier - with the first input of the executive body, and the second output of the first command generator is connected to the fourth input of the position signal generator and the second input of the third command generator, the third input of which is connected to the second the output of the command unit and the third input of the second command generator, the fourth input of the third command generator is connected to the fifth input of the position signal generator, The third output of the third command generator is connected to the fourth input of the second command generator, to the sixth input of the position signal generator and through the second power amplifier to the second input of the executive -ofjraHa, the first and second outputs of the position signal generator are connected to the corresponding inputs of the information block, the first element OR, the output of which is connected via a time relay to the first inputs of the first and second elements, AND, the second input, the first of which is connected to the first output of the former first command s, and the second input of the second - with the third output of the third command generator, the third inputs of the first and second elements And are connected respectively to the fourth input of the third command generator and the first input of the first command generator, the outputs of the first and second And elements are connected to the first and the second inputs of the second element OR, respectively that, in order to expand the field of application of the device and increase its reliability by reserving, reducing the recovery time and increasing maintainability, a second time relay, vii and second triggers, third, fourth, fifth, sixth, seventh elements AND, third and fourth elements OR, third and fourth power amplifiers, the first inputs of the third and fourth elements AND connected through the second time relay with the output of the first element OR, first and the second inputs of which are connected to the inputs of the first and second power amplifiers, the second inputs of the third and fourth elements And are connected to the second output of the first trigger, the third inputs of the third and fourth elements And are connected respectively to the first in for the first command and the second output of the third command generator, the fourth inputs of the third and fourth elements And are connected respectively to the fourth input of the third command generator and the first input of the first command generator, and the outputs of the third and fourth elements I with the first and second inputs of the third the OR element, the output of which is connected to the first input of the second trigger, the first input of the first trigger is connected to the output of the second OR element, and the first output of the first trigger is connected to the third input of the unit and the first input of the fourth OR element, the second input of which is connected to the second input of the first trigger, and the output to the second the input of the second trigger, the output of which is connected to the second inputs of the fifth, sixth and seventh elements AND, the outputs of the fifth and sixth elements AND are connected respectively through the third and fourth power amplifiers with the first and second inputs of the executive body, the first input of the seventh element And connected to the output of the first time relay, the first inputs the fifth and sixth elements and are connected to the third inputs of the third and fourth elements, respectively.