SU1647512A1 - Device with redundancy for electropneumatic valve control - Google Patents

Abstract

The invention relates to automation and computing and can be used in automated systems for monitoring and control of increased reliability. The purpose of the invention is to increase the reliability of the device and increase the completeness of control. The device contains three redundant control channels for electropneumatic valves, each channel contains three elements for matching input signals, three majority elements, a synchronization gate generator, two synchronizers, a delay element, registers, a decoder, end-amplifier blocks, the first block of polarized relays, the switching and control unit of the power supply circuits, the control and signaling unit of the output control majority scheme, three elements And, two elements OR, registers of a terminal amplifier unit, polarized relay blocks, a second power switching unit of electropneumatic valves, control and signaling blocks of the output major control circuit, control circuit and signaling the presence of short circuits of the valves on the housing with corresponding connections. 3 hp ff, 3 ill.

Description

The invention relates to automation and computer technology and can be used in automated control systems and controls of increased reliability, working in conjunction with computers and providing control of electropneumatic valves located on non-stationary replaceable control objects operating in emergency conditions.

The purpose of the invention is to increase the reliability of the device and increase the completeness of the control.

Fig. 1 shows a redundant device for controlling electropneumatic valves; figure 2 - node

switching and control of power supply circuits of electropneumatic valves; FIG. 3 shows an example of the use of a device in a monitoring and control system.

The device contains the first to the third reserved channels 1.1 - 1.3 of the control of electropneumatic valves, the first to the third elements 2-4 of the input signals matching, the first to the third major elements 5-7, the synchronizer 8 of the gate synchronization, the first one-frequency vibrator 9, the first register 10 , the delay element 11, the first to the third elements And 12 - 14, the first and second elements OR 15 and 16, the second one-shot 17. decoder 18, the second to the fourth registers 19 - 21, with

ABOUT

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the first to the fourth blocks 22–25 terminal amplifiers, the first 26. the second 27 and the third 28 blocks of polarized relays, as well as the switching and control unit 29 of the power supply circuits of electropneumatic valves, the first 30 and second 31 power switching units of the electropneumatic valves, the control and signaling unit 32 of the majority control circuits, the first and second nodes 33.1 and 33.2 of the control circuit of the electropneumatic valves on the housing, inputs 34.1 -34.3,35.1 -35.3, 36.1 - 36.3. 37.1 - 37.3, 38.t - 38.3, 39.1 - 39.3, 40.1 - 40.N, exits 41.1 - 41.N, 42.1, 42.2, 43.1 - 43.N and 44.1 - 44.N, exits 45.1, 45.2. 45.3, exits 46.1-46.3. zero potential bus 47, positive power bus 48, electropneumoglists 49.1 - 49.N.

The switching unit and control of power supply circuits of electropneumatic valves include the first 50.1 and second 50.2 load elements, the first 51.1 and second 51.2 indicators, the first 52.1 through the sixth 52.6 diverting diodes, the windings of the first 53.1 and the second 53.2 alarm relay (Figure 2).

The control and monitoring system includes an operator console 54, a computer 55, an overhead signal indicator 56, a peripheral communication module 57, redundant devices 58.1 - 58.To control electropower stations (fmg.z).

Figure 2 also shows the first group of contacts of the third block of polarized relays 59-64, the first group of closing contacts of the first block of polarized relays 65-67, the first group of switching contacts of the first block of polarized relays 68-70, the group of contacts of the second block of polarized relay 71 - 76, the second group of closing contacts of the third block of polarized relays 77 - 79, the second group of closing contacts of the third block of polarized relays 80-82, the closing contacts of the first 83 and second 84 alarm relay.

Redundant device operates as follows.

Each of the three reserved channels 1-.1-1.3 through the interface module of the communication, inputs 34.1-34.3,35.1- 35.3,36.1 -36.3 receive the signals Synchronization, Data, Sample, respectively, which through the elements 2-4 of the input signals form a command control of electropneumatic valves in the parallel code at the output of the register 10. In this case, the synchronization signal from the outputs 37.1 - 37.3 of the element 2 of matching each channel goes to the majority element 5 and then through the driver

8 strobe at the C input of the register 10. Signal Data from the outputs 38.1 - 38.3 of the element 3 matching each channel is fed to the majority element 6 and further to the D input of the register 10. Signal Sampling from the outputs

39.1-39.3 of element 4 of each channel enters the majority element 7 and further to the V-input of the register 10. Thus, the majority elements 5-7 ensure the passage of reliable information when one channel of communication line fails. Upon termination of the signal Sampling from the output of the majority element 7, the first one-shot 9 is started, removing the signal

5 prohibit the issuance of information accumulated by the register 10. The information accumulated by register 10 is the A1-A3 operation codes and the X1-XN, Y1-YN control codes.

0 Operation code A1, received by a low level signal, And 12 and OR 15 elements is converted into an information recording permission signal in register 19. In addition, operation code A1 through register 21, block

5 24 and block 28 polarized relays form a node connection control command

33.2.control of the presence of short-circuiting of the windings of electropneumatic valves on the housing on the negative bus.

0 The operation code A3 received by the low level signal, elements AND 14 and OR 16 is converted into an information recording permission signal in the register 20. In addition, the operation code A3 through the register 21, the block

5 24 and the block 28 of polarized relays forms a command to control the connection of the node 33.1 to control the presence of a short circuit of the windings of electropneumatic valves on the housing along a positive bus.

0

Operation code A2, received by the low level signal, by AND 13, OR 15 and 16 elements is converted into information recording permission signals, and registers 19 and 20.

5 The control code X1-XN enters the D-inputs of registers 19 and 20, is written to these registers and then through blocks 22 and 23 enters the form of the first pole of the control command of relay blocks 26 and 27.

0 The control code Y1-YN arrives at the D input, the operation codes A1, A3 arrive at the DL Og inputs of the decoder 18, the opening of the decoder is carried out by the one-oscillator 17, generating a pulse

5 with a duration sufficient to trigger the blocks 26 to 28 polarized relays, the one-shot 17 is triggered by the delay element 11 by the falling edge of the pulse produced by the one-shot 9, the leading edge of the specified pulse is written to registers 19-21. Thus, the code of the control command from the decoder 18 is through block 25 enters the form of the second pole of the control command to blocks 26-28 of polarized relays.

Decoder 18 at the D-input, registers 19 and 20, blocks 22 and 23, blocks 26 and 27 connect electropneumatic valves to the power buses through switching and control unit 29, decoder 18 at the Di, O2-inputs, register 21, block 24, unit 28 connects the nodes 33.1 and 33.2 to control the presence of short-circuits of electropneumatically valves on the housing.

The node 29 of the switching and control of power circuits of electropneumatic valves operates as follows.

Before regular operation, the control of the presence of a short circuit on the case of the windings of electropneumatic valves is organized by software, with a computer being issued a command to close the relay of three channels 1.1 to 1.3 of the control, the contacts of the contact group of the node 33.1 are closed. If there is a short-circuit of the positive tire through the winding of the electropneumatic valve, a signal is output on output 45.2 and the indicator 51.1 is ignited. Similarly, the presence of a short-circuit of the negative bus on the case is monitored through the winding of the electropneumatic valve, while the contact group of the node 33.1 must be in the disabled state.

Let us consider an example of using a redundant electropneumatic valve control device (Fig. 3) as part of a control and monitoring system.

The control and monitoring system operates as follows.

The operation and control of electropneumatic valves is performed from the operator's console, and the control commands of the electropneumatic valves from the computer 55 are transmitted to the communication module 57, where they are converted from a parallel code to a serial one, which is transmitted to the redundant devices 58.1 - 58. To control the electromotive valves separated from the last at some distance. When one of the three channels of the redundant control unit of electropneumatic valves fails, as well as the short circuit of the windings of the electropneumatic valves to the case, the signals of the indicated malfunctions go to the service signal indicator 56, and the computer 55 is analyzed, and when the short circuit of the winding of the electropneumatic valve is blocked, the command is blocked

data management electropneumatic valves.

Claims (4)

1. A redundant device for controlling electropneumatic valves containing three redundant output channels, each channel containing the first, second and third elements of the input signals, the first, second and 0 third major elements, synchronization strobe driver, first and second one-shot, delay element, first and second registers, decoder, first and second blocks of terminal amplifiers, first block of polarized relays, switching node and control of power supply circuits of elektrotnemoklopanov containing the first switching block power electropneumatic valves, control and alarm unit 0 of the majority control circuit, the input of the first matching element of the input signals is the input of the synchronization signal of the channel, and the output is connected to the first input of the first major signal 5 channel elements and the inputs of the first major elements of other reserved channels, the output of the first majority element is connected to the input of the gate forming element Synchronization, output 0 which is connected to the sync input of the first register, the input of the second matching element of the input signals is the signal input of the channel data, and the output is connected to the input of the second major element and 5 inputs of the second major elements of other reserved channels, the output of the second major element is connected to the data input of the first register, the input of the third matching element of the input 0 signals is the input of the channel sampling signal, and the output is connected to the input of the third major element and the inputs of the third major elements of other reserved channels, the output of the third major element is connected to the control input of receiving the first register and the input of the first one-oscillator whose output is connected to the input of the first sample the register and the input of the delay element, the output of which is connected to the synchronous input of the second register and the input of the second one-oscillator, the output of which is connected to the work enable input of the ifrator, first and second informational outputs of the first The 5 registers are connected respectively to the data inputs of the second register and the decoder, the outputs of the second register are connected to the inputs of the first block of final amplifiers, the outputs of which are connected to the inputs of the first block of polarized rails, in order to increase the reliability of the device and increase the completeness of control, The first, second, and third elements of AND, the first and second elements of OR, the third and fourth registers, the third and fourth blocks of terminal amplifiers, the second and third blocks of polarized re e, the second power supply switching unit of the electrogneumatic valves, the first and second control units for electrolytic pneumatic control valves to the housing, the first inputs of the first, second and third elements And are connected to the address outputs of the first register, and the second inputs are inputs of decryption of the received information of the reserved channel, the output of the first element And is connected to the first input of the first element OR, to the first input of the data of the decoder and to the first information input of the fourth register, the output of the second element And is connected to the second m input of the first element OR and the first input of the second element OR, the output of the third element AND is connected to the second input of the second element OR, the second data input of the decoder and the second information input of the fourth register, the output of the first element OR connected to the input enable input of the second register, the output of the second element OR is connected to the deed of reception of the third register, the information inputs of the third register are connected to the first information outputs of the first register, and the outputs - to the inputs of the second terminal block silicon inputs, the outputs of which are connected to the corresponding first inputs of the second block of polarized relays, sync inputs from the second to the fourth registers are connected to the output of the delay element, the outputs of the fourth register are connected to the inputs of the third block of final amplifiers, outputs respectively connected to the first inputs of the third block of polarized relays, the second inputs of which and the second inputs of the first and second blocks of polarized relays are connected to the corresponding outputs of the fourth block of final amplifiers, the inputs of Tani first and rigorously elektropkevmoklapanov power switching units are connected to zero potential bus control outputs are the outputs of the device for connection to the respective solenoid-zhodam, control outputs connected to respective inputs of the control and signaling unit The majority control circuit, the output of which is the control output of the device, the power inputs of the first and second closure control units electropneumatically to the case are connected to the zero potential bus and to the power buses of the electric pneumatic valves, respectively, and the outputs are the corresponding display outputs of the device. 2. Device pop. 1, characterized by the fact that the node for monitoring the closing of electropneumatic valves on the housing contains the first and second groups of closing contacts of the third block of polarized relays, the corresponding contacts of each group are connected in pairs in series. The inputs of which are the power input of the node, and the outputs through the corresponding load element connected to the first output of the corresponding indicator element, the second output of which is connected to the zero potential bus and is the output of the node. 3. Device according to n.t. This means that the power supply switching unit of the electronevolt-valves contains the corresponding group of closing contacts of the first polarization relay and the corresponding group of switching contacts of the first block of polarized relays, the inputs of the closing contacts are the power supply input of the unit, the outputs through the opening group of the corresponding switching contacts are connected to the control output of the flea, and through the closing group of the corresponding switching contacts to the corresponding control output of the unit. 4. The device according to claim 1, that is, that the control and alarm unit the major control circuit contains the first and second alarm relays, first through sixth decoupling diodes, cathodes from first to third, and anodes from the fourth to sixth decoupling diodes are the corresponding control inputs of the block, the anodes of the first and third decoupling diodes are connected through the winding of the first alarm relay to the positive busbar, the cathodes of the fourth to the sixth diverting diodes are connected via a winding of the second alarm relay to a zero-potential bus, which is connected to the control output of the unit through parallel-connected short-circuiting contacts of the first and second alarm relays. m about / zd rWr 6b VSb Xi ns & I Z Off D R J 91SЈbffS№ & 2i IP / kz. t -LnE ЈL Zl IL Jzt feff ZЈ G0I -J o & f / Ј5 I Ј Z $ HHS $ ty% № L iisM # MS Z SiT D 69 SQ No Ј9 29 r-vazl IL / f & Lt