SU1083162A1 - Pneumatic system for control of cocks of multiline gas-distribution station - Google Patents

Abstract

1. PNEUMATIC SYSTEM FOR CONTROLLING CRANES OF SUBGETIC GAS DISTRIBUTION STATION, containing sensors of warning and emergency levels of increase and decrease; warning level of pressure increase, warning level of pressure decrease, emergency level of pressure decrease are connected to the moves of the respective blocks of adjustable delay, as well as the switching unit, the outputs of which are the outputs of the system, characterized in that, in order to expand the application area 1, it contains a block of formation of temporary control signals, the input channels of which are for the off-program signals of simultaneous closing of taps, (About positive deviation of pressure, about the presence of a deviation of pressure, negative deviation of pressure, non-program simultaneous opening of taps, about the safety of the sign of the deviation of pressure, about mixing no sign of the pressure deviation of the off-program opening of the first valve is connected to the corresponding output channels of the logical block, and output channels to the inputs of the switching unit. IND

Description

2. The system according to claim 1, which differs from the fact that the logic block consists of go RS-triggers, two elements of ShZh and two elements AND, and the input S of the first RS-trigger is connected to the input channel of the logic block for emergency pressure pressure level The input § of the second RS trigger is connected to the input channel of the logic block for the warning signal level of the increase, the input S of the third RS trigger is connected to the input channel of the logic block for the signal of the warning level of the pressure drop, S input of the fourth (5 three for the signal of the emergency pressure drop level, the inputs of the first element OR are connected to the input channels of the logical block for the warning levels of the increase and decrease of pressure, the outputs of the first, second, third and fourth R5 triggers and the first element OR are connected respectively to the output channels of the logic block and 1 signals of non-program simultaneous closure of taps, positive and negative pressure deviation, non-program simultaneously. opening taps and signals on the presence of pressure deviation, the inputs of the second element OR are connected to the outputs of the second and third RS triggers, and the codes of the second CM element are connected to the output channel of the logic unit for the signal; about the safety of the sign of the pressure deviation, the inputs of the first element And are connected to the outputs of the second and third RS triggers, and the output to the inputs R of the first and fourth R9 triggers and the input S of the second RS trigger, the inverse input of the second element And connected to the output of the second element OR, direct input with power line j and output with input R and RS RS trigger, the output of which is connected to the output channel of the logic block for the signal about the change of sign of the pressure deviation and inputs R of the second and third Rs-flip-flops. 62 3. The system according to claim 2, characterized in that the logical unit has a third AND element whose inputs are connected to the output of the first trigger and the first OR element, and the output is connected to the output channel of the logical unit for the signal of the off-program opening of the first valve, 4. Pop-up system 1, characterized in that the block for generating time signals of anchoring consists of single-type cells according to the number of controlled taps, each of which contains a fourth element connected in series. And, adjusting the 1st delay element, the sixth RS trigger on input 5, as well as two parallel I-SHW chains, the block's input channel for the signal about the presence of pressure deviation connected to the first and second inputs of the fourth And element in the first cell and the second inputs of the fourth elements And after the cells, the third input of each of the fourth elements I is connected to the input channel of the block for the signal about the safety of the sign of the pressure deviation, the first input of the fourth element Ives of each subsequent cell is connected to the output of the RS RS-trigger before The cell, the input R of each of the sixth RS triggers, is connected to the input channel of the block for the signal about the change of sign of the pressure deviation, the inputs of the elements And in the I-LN chains are connected to the input channels of the block for the signals about the sign of the pressure deviation and the outputs of the corresponding sixth cell ftS triggers, and the other inputs of the OR elements in the AND-OR chains are connected to the input channels of the block for signals of out-of-program simultaneous opening and closing of taps, and the outputs of the chains are the outputs of the block Single pressure deviation connected to the inputs R RS-flip-flops in each cell. , :

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Picture, ethene refers to pneumatics and is intended to up.

control valves in the gas industry, namely for automatic control of pneumatic cranes multiline gas distribution station (GDS), are known pneumatic systems for controlling valves installed on the lines (threads) GDS, ensure the closure and opening of the valve depending on the current value of the controlled technological letting laziness in the gas pipeline on. GDS exit.  For example, a pneumatic device for controlling pneumatic actuators contains process pressure sensors, delay blocks, memory blocks, and a logic unit that implements a rigid program for detecting signals to open and close valve nodes as a function of input signals from process sensors pressure and from control circuits: over-position of cranes In this system, it is not possible to quickly change the control channels of the cranes in order to evenly wear the actuators.  The known Protection-3 system, pre; assigned to control three-thread GDS cranes, contains pressure-relay sensors, delay blocks, logic and memory blocks, and a switch block emitting signals to the opening and closing nodes of the taps and receiving signals from sensors - alarm and emergency levels of pressure increase and decrease and feedback signals from the crane position control circuits.  This system provides for an operative change of the control channels of the cranes with the help of the help of the switching unit t2.  The use of such a system in modern high-capacity multi-row GDSs (with the number of threads A or more) with a large number of controlled taps requires an increase in the number of pressure sensors.  At the same time, to ensure operation in a narrow range of controlled process pressure, pneumatic pressure sensors should have such high technical characteristics (high accuracy and narrow deadband), that their use in practical systems to control cranes of powerful multiline GDS becomes unacceptable. technical and economic considerations, especially under 1 2 m climatic conditions.  In this way, . Protection-3 system has a limited scope in terms of the number of operated cranes.  The purpose of the invention is to expand the scope.  This goal is achieved by the fact that the pneumatic system for controlling cranes of a multi-line gas distribution station, containing sensors for warning and emergency levels of pressure and underpressure, installed on the outlet gas pipeline of the station and connected to each of them adjustable delay blocks, logic block, input channels which are for emergency pressure signals, warning pressure levels, warning pressure drops, emergency pressure The pressure drops are connected to the outputs of the respective adjustable delay blocks, as well as the switching unit whose outputs are the System outputs, introduced a control signal generation unit whose input channels for the signals of the non-program simultaneous closing of taps, positive pressure deviation, negative pressure deviation of pressure, non-program simultaneous opening of taps, on the safety of the sign of deviation of pressure, on the change of the sign of deviation of pressure ogrammnogo first tap opening are connected to the corresponding output channels of the logical unit, and the output channels - to the inputs of the switching unit.  The logic block consists of five triggers, two OR elements and two AND elements, the input S of the first RS trigger being connected to the input channel of the logic block for signals of the emergency pressure boosting level, the input 5 of the second RS trigger connecting to the input channel of the logic block for the pressure warning level signal, input 5 of the third RS trigger is connected to the input channel of the logic unit for the alarm signal of the pressure drop level, input S of the fourth RS trigger is connected to the input channel logical go, block for alarm signal.  the pressure drop level, the inputs of the first element OR are connected to the input channels of the logic block for signals of warning levels of pressure increase and decrease, the outputs of the first, second, third and leTBepToro R5 triggers and the first OR element are respectively connected to the output of the programmable signals simultaneous closing of taps, positive and negative pressure deviation, non-programmed one-time opening of taps and a signal on the presence of pressure deviation, the inputs of the second element The OR input is connected to the outputs of the second and third RS triggers, and the outputs of the second element OR are connected to the output channel of the logic unit to signal the safety sign of the pressure deviation, the inputs of the first element AND are connected to the outputs of the second and third R5 triggers, and the output with the inputs R of the first and fourth R5-triggers and the input S of the fifth RS-trigger, the reverse input of the second element AND connected to the output of the second element OR the direct input to the power line, and the output to the input of the R fifth RS three Hera, the output of which is connected to the output channel a logic unit for changing the sign of the signal to prevent deflection laziness and R inputs of the second and third RS -triggerov.  The third element can also be set in the logic block. And, the inputs, which are connected to the output of the first RS trigger and the first element OR, and the output are connected to the output channel of the logic unit {signal for the non-program opening of the first valve.  The control signal generating unit consists of cells of the same type according to the number of controlled taps, each of which contains successively.  the fourth element AND, an adjustable delay element, the sixth trigger on input S, and two parallel chains J – III, the input channel of the block for the signal about the presence of pressure deviation connected to the first and second inputs of the fourth element I in the first the second inputs of the fourth elements And the successive cells, the third input of each 13 fourth elements And connected to the input channel of the block for t 26 signal about the preservation of the sign of the pressure deviation, the first input of the fourth element And in each subsequent cell with the output of the sixth RS triggers of the previous cell, the input R of each of the sixth RS triggers is connected to the input channel of the block for the signal on the change of the sign of the pressure deviation, the inputs of the elements of the IV chains of AND-OR are connected to the input channels of the block for the signals of the sign of the pressure deviation and the outputs of the sixth R5 triggers corresponding to this cell, and the other inputs of the OR elements in the I-IL chains are connected to the input channels of the block for the non-program signals simultaneously opening and closing the taps, and the outputs of the chains are the outputs of the block When in use, the input channel block of changing the deflection plate is connected to the pressure inlet to the RS-flip-flops in each cell.  Such a circuit solution makes it possible to expand the field of application of the system under consideration, allowing the control of an almost unlimited number of cranes on the GDS lines.  FIG.  1 shows the structural scheme of the proposed pneumatic system; in fig.  2 - functional logic block; in fig.  3 is a functional block diagram of the formation of time control signals; in fig.  4 shows an example of a timing diagram for the operation of a control signal generation unit.  The pneumatic system consists (FIG.  1) from successively installed sensors-relays 1 of warning and emergency levels of increase and decrease in pressure, units 2 of adjustable delay, logic unit 3, unit 4 of generating time control signals, unit 5 of switching.  The number of pressure sensors-relays 1 and blocks 2 delays is equal to four e, according to the number of levels inhibited in deviations of pressure, 1 from the nominal value in the output gas pipeline GDS: emergency level.  increase in pressure (AED); precautionary level of pressure increase (LDP); a precautionary level of pressure drop (HDPE); emergency pressure drop level AED).  The pressure sensors used in the relay are industrial-grade sensors with a pneumatic discrete output signal.  Delay blocks provide protection against the scrolling of signals at. random, short-term processing, scientific research institute of pressure sensors-relays.  It consists of series of throttles and tanks, in parallel with which a quick valve is installed on the bypass line. th pressure release from the throttling portion of the input signal disappears.  A relay element can be installed at the output of the delay unit.  The logic unit is designed to process signals from pressure sensors through a delay block and generate the following command signals to the inputs of block 4: a memorized signal of an emergency pressure increase level, a memorized signal of a warning level of pressure; a reminder of the precautionary level of pressure drop; memorized signal of emergency pressure drop; a signal to disconnect a pressure for any warning level (ATS and MHP); a signal about the safety of the sign of the pressure deviation; signal of a change in the sign of the deviation; pressure reduction.  In addition to these signals, block 3 to generate command signals for separate, non-program control of a crane.  For example, after the emergency shutdown of all taps when the AVD is exceeded, the V signal to open the first tap. It is appropriate to submit in advance, before the start of the program in the PWU for opening the taps.  This reduces the rate of decrease in pressure after an emergency shutdown, which has a positive effect on the dynamic response of the entire GDS.  Block 3 (FIG.  2) consists of five R5-triggers 6-10, two logical elements OR 11 and 12 and two logical elements AND 13 and 14.  Input S; The first RS-Trigger 6 is connected to the input channel for the alBapUJtrHofo signal of the pressure level, and C: this trigger output is output to the output channel of the C signal — the reminded signal of the emergency pressure with a plus sign serving for the out-of-program simultaneous closure of all taps.  9 ft. The S input of the second RS trigger 7 is connected to the input channel of the block for the warning signal of the pressure increase, and from the output of this trigger SIGNES C2 is picked up by a memorized positive pressure deviation signal (with a plus sign) The inputs of the first element OR 11 are connected to. the input channel of the block for signals of the warning levels of increase and decrease in pressure p, and from the output of this element the signal C 3 is taken - the signal about the presence of a pressure deviation (from the nominal level).   The input 5 of the third RS trigger 8 is connected to the input channel of the block for a signal of the warning pressure drop level, and the output of this trigger is recorded on the output channel of the block signal C c.  - signal of negative pressure deviation (with a minus sign).  The input S of the fourth RS trigger 9 is connected to the input channel of the block for the alarm signal of the emergency pressure decrease level, and from the output of this trigger the signal C g is output to the block output channel with a minus sign that serves for the unprogrammed simultaneous opening of all cranes.  . . . ,    ; .  .  The inputs of the second logic element OR 12 are connected to the outputs of the second and third R5 triggers, and from the code of this element, the signal C is recorded to the output channel of the block — a signal about the preservation of the sign of the pressure deviation.  The output of this element SHS is also connected with the inverse input of the second element And 14.  The inputs of the first element And 13 are connected to the output of the second and third RS-triggers, and the output of this element is connected to the input S of the second RS-flip-flop 10 and to the input R (reset) of the first and fourth RS-flip-flops.  .  The direct input of the second element AND 14 is connected to the power line, and the output of this element is connected to the input R (reset) of the first f S-flip-flop.  From the output of the fifth RS flip-flop, the signal C 7 is removed to the output channel of the block — a signal to change the sign of the pressure deviation.  The output of this RS trigger is also connected to the input R (reset) of the second and third RS trigger.  The direct and inverse inputs of the third and second terminals 15 are connected to the output of the first RS trigger and the output of the first logical element OR, and from the output of this element I, the signal Cd is output to the output channel, the signal of the off-program opening of the first crane.  Unit 4 is designed to, depending on the combination and duration of the command signals, generate a series of consecutive signals supplied at predetermined time intervals through the switching unit 5 to the nodes for opening and closing taps.  The number of signals generated by the blocks for opening or closing taps is determined by the duration of the pressure deviation from the nominal value in the outlet gas supply system of the GDS.  The time intervals between each signal are adjusted according to the specific conditions of the GDS.  From the logical block to the inputs of block 4, the following command signals come from the ignals; С - signal of non-program simultaneous closing of taps; C2 signal of positive pressure deviation (+ LR); Sd is a signal of the presence of a pressure deviation (lr); C is a negative pressure deviation signal (-lr); C - the extra-program signal is many; simultaneously opening the taps; C - the signal on the preservation of the sign Lr on the change-sign Lp; Cg С is the signal to signal the 1st program opening of the 1st crane (other command signals can be sent to the nonprogrammed opening and closing of any control valve).  The control signal generation unit 4 consists of cells of the same type 16, the number of which is equal to the number of controlled taps. Each cell contains the following sequentially connected elements (Fig.  3): a fourth element And 17, an adjustable element 18 delay, the sixth RS-trigger 19 at input S.  The output of the RS flip-flop is connected to two.  parallel AND-OR chains, each of which contains an AND 20 element connected in series (20.  2; 20. 3-n 2; p ,. 3) on the direct input (the element has inverse outputs for the implementation of the ban function) w, element OR 21 (21. one; 21. 2: p. 1, p.  2).  In each control unit, channel 4 of signal C is connected to the input of the element OR 2 in the AND-OR chain connected to nodes 6210 for closing the crane through block 5.  The signal channel C 2 in each block 4 is connected to the direct input of the element AND 20 in the AND-OR chain connected to the node for closing the taps and to the inverse input of the element AND in the other I-IL chain of the same cell connected to the opening node the crane.  The signal channel C is associated with the first H BTOpbJM inputs of the element And the first cell and with the second input of the element And in the subsequent cells.  The signal channel C in each cell is connected to the direct input AND 20 in the AND-OR chain connected to the crane opening node and to the inverse input of the AND element in the AND-OR chain connected to the crane closing node.  The Cg channel is connected in each cell to the input of the OR element 21 in the AND-OR chain associated with the crane opening nodes.  The signal channel C is connected to the third input of the element AND 17 in each cell.  The C-signal channel is connected to the R input (reset) of the R5 trigger 19 in each cell.  Signal channel Sd connect-.  It is not with the first cell, with the input of the OR element 21 in the AND-OR chain connected through the switch to the node to open the crane.  Other command signals of extra-program separate control of opening and closing of taps (if necessary) are also connected to the input of the OR element in the corresponding AND-OR chain.  .  For ST IZI between cells output R5-trigger for this. cells connected to the input of the input element And in the subsequent block.  The switching unit is a simple terminal block, which allows to quickly and easily carry out periodic re-switching of the lines leading to the opening and closing units of the taps to change the sequence of operation of the taps without any changes in block 4.  As control nodes, for example, pneumatic control nodes can be used.  The system works in the following way.  When the process pressure deviates, for example, when the LDPE is exceeded, the corresponding pressure sensor T is triggered and the signal from it through block 2 delays enters block 3, which generates command signals from 1, which block 4 starts to operate, sequentially and at given intervals 11,.  management time (in this case, closing) of the taps one by one.  If the signal from the pressure sensors disappears, block 4 will stop working (stop dialing the program) without giving a signal to close the village; blowing cranes.  If the same signal from the pressure switch sensor reappears, block 4 will continue its operation and with a sufficient signal duration ot the pressure gauge all the GDS valves can close.  If a pressure deviation occurs with the opposite sign (a signal to lower below the HDPE), unit A resets the program it previously recruited (the GDS cranes will remain in the position in which the program is reset from block 4) and begins to work, issuing consecutive signals with a predetermined time interval on. opening taps depending on the duration of this signal.  Thus, the appearance of a signal from a pressure sensor with one sign causes the operation of block 4 according to the program set, and the disappearance of this signal causes the termination of operation of block 4.  The occurrence of a signal from a pressure sensor with an opposite sign causes a reset of the programmer and a new run on the program set.  If the pressure deviates above the AVD or below the IDA, the signal from the corresponding pressure sensor relay unit 3 issues a command for simultaneous non-programmed (regardless of program selection) opening or closing of the taps — signals С or Сe, Depending on the particular circuit, unit 3 can also commands for non-program individual control of any tap, for example, the Cg command for opening the first tap.  The signals C – Cg in block 3 Bbipa are acted upon in accordance with the func tion of the first, second, third, and fourth R5 triggers, as well as the first logical element of the ISh (4 1G. G In the absence of signals about the pressure deviation for the predecessor LDPE and NVD and there is no memorized signal at the output of the second and third RS-trigs, there is no signal C and a signal at the input S of the fifth RS-trigger, while at the R (reset) input The second RS trigger receives a signal 212 from the output of the second logic element I.  When a pressure deviation occurs in the LDPE, signals C2 and C appear and the signal at the output of the second logic element I. disappears.  A further increase in pressure does not lead to a change in the state of the signals C2, C, and C- ,.  With the further decrease in pressure below the LDPE, these signals also do not change until the pressure drops below the LDPE, which causes the appearance of signal C, the signal at the output of the first AND gate, triggering on the input of the 5th PS PS trigger and occurrence. signal st.  At the same time, the output of this logic element I passes signals to the input R (reset) of the second and third triggers, the signals Cg, Q and C and the output signal of the first logic element I. disappear.  The signal at input S disappears and a signal at the input of the R and RS RS trigger occurs.  The C-signal and the signals at the R input of the second and third iRS triggers disappear.  The signals C and Cg reappear. Thus, when the pressure deviation changes from positive to negative, the signal-C appears and the signal C disappears, then the signal C-disappears, and the signal C appears.  At the same time, the signal Su is reset, a signal of € 4 appears and disappears for a short time (for the time when signal C is output).  Similarly, when the deviation of the pressure changes from negative to positive, a signal C appears, a drop in the signal SL, and briefly for a time the signal C is signal 2.  and C.  The Co signal arises if, after the pressure deviates, the AED pressure then decreases below the LDPE.  This allows the back-up, even before the pressure drops below the low-pressure cylinder, to open the valve, thereby reducing the rate of pressure decrease, providing a smoother dynamics of pressure change at the outlet of the GDS.  The operation of block 4 according to the program e is explained by the time diagram.  With nojja4e, the input of the block, for example, the signal Ci (indicating that the LDPE is exceeded), simultaneously signals Cj and C.  After the delay time LT, defined by the setting element 18 of the delay in the first cell,

The RS trigger and at the output of the first cell of the block, a signal is supplied to the node for closing the valve through the chain OR OR If the duration of the signal Cj is less than the total delay time s T2 determined by the setting of the delay elements 18 in the first two cells, then after the signal C disappears (with the simultaneous disappearance of the Co command as well) the program set is stopped, because the RS-trigger in the second cell does not have time to work. Subsequently, if a pressure deviation of the same sign reappears as before, and the inputs of block 4 receive signals C2 and C for a sufficiently presumptive time, then a further set of programs is processed: after 4, a trigger in the second cell is triggered and At the output of the second cell, a signal is generated, which is fed to the node for closing the second crane through the chain I.LI2 2 Then a sequential operation occurs in all the cells.25 The last is triggered (the 5 trigger in the n-cell and a signal is sent to the node

close the tap on the chain AND -OR ,.

Subsequent preservation or disappearance of the pressure deviation beyond the PVD and the signals C and C, respectively, do not affect the state. dialed in block 4 of the program.

If, at some point in the program set or after it has been dialed, a pressure deviation occurs below the ATS and a signal C is sent to the input of the block (signal C is simultaneously applied), then the signal C | and a C-40 signal is applied to the inputs of the RS-triggers, causing a program reset. After the signal C disappears and the Ct signal appears, the program starts again, but now the output signals 45 from the OR elements are sent to the nodes at the opening of the taps, and then from the first switch.

Thus, the command signals, when the unit 4 operates under the e-JQ at program, are for the following purposes: C, C - permission to start dialing and to continue dialing the program; С - signal to reset the dial plan / program.

The use of the proposed pneumatic system allows the control of pneumatic cranes on modern powerful multi-line GDSs with any number of controlled cranes, since the number of blocks 4 can be increased almost indefinitely.

The pneumatic system is more sensitive than its counterparts to a change in process pressure; it reacts not only to the appearance of a signal about pressure deviation, but also to the duration of this deviation. At the same time, the best dynamic response of the GDS as a whole is ensured due to the fact that when the signal L of the same sign reappears, the process of opening or closing taps does not occur anew, i.e., starting from the first crane, and from subsequent taps on which this process was stopped.

An improvement in the dynamic characteristics of a particular GSR can also be achieved by changing the time intervals between successive opening or closing of taps.

The number of actuations of the valves opened at the beginning of the set of programs GI is also reduced, which has a positive effect on the reduction of operating costs.

The number of required: pressure switch sensors is reduced, as for the generation of commands | supplied to the PVU to control the program, four sensors-relays are enough regardless of the number of controlled taps.

With a decrease in the number of pressure sensors, the number of communication lines with a technological object decreases, which facilitates installation and commissioning of the system. The number of communication lines is also reduced because, as compared with analogs, there is no need to send feedback signals from the control circuits to the position of the cranes, thus simplifying the design of the circuits controlling the position of the cranes.

Taking into account the widespread use of GDS in the national economy, the application of the invention will have a significant technical and economic effect.

CPD

FIG. 2

Fig.Z

Claims (4)

1. PNEUMATIC SYSTEM FOR MANAGING THE CRANES OF A MULTI-FLOW GAS DISTRIBUTION STATION, containing sensors for warning and emergency levels of increase and decrease, pressure, installed on the outlet gas pipeline of the station and connected to each of them adjustable delay units, a logical unit whose input channels for emergency level signals pressure increase, warning level of pressure increase, warning level of pressure reduction, emergency level of pressure reduction are connected to the outputs the corresponding adjustable delay units, as well as a switching unit, the outputs of which are system outputs, characterized in that, in order to expand the scope of application, it contains a block for generating temporary control signals, the input channels of which are for off-program simultaneous g valves closing, positive deviation pressure, the presence of pressure deviation, negative pressure deviation, off-program simultaneous opening of taps, the safety of the sign of pressure deviation, the change of sign off neniya pressure, opening the first extra-curricular tap connected to the corresponding output Canada are ¹ lam logic block and the output channels - to the inputs of the switching unit. SU „„ 1083162 2. The system by π. 1, with the fact that the logic unit consists of five RS-triggers, two OR elements, and two AND elements, the input S of the first R5-trigger being connected to the input channel of the logic unit for signals of the emergency level of pressure increase, input S the second RS-flip-flop is connected to the input channel of the logic block for a signal of a warning level of pressure increase, the input S of the third RS-flip-flop is connected to the input channel of the logic block for a signal 'warning level of pressure reduction, the input S of the fourth RS-flip is connected to the input channel of the logic block for the signal of the alarm level of pressure reduction, input ^{1 of the} first OR element is connected to the input channels of the logic block for signals of the warning levels of pressure increase and decrease, the outputs of the first, second, third and fourth R5 triggers and the nerve “OR element are connected accordingly; to the output channels of the logic block for signals of off-program simultaneous closing of taps, positive and negative pressure deviations, off-program simultaneous. the opening of taps and signals about the presence of a pressure deviation, the inputs of the second OR element are connected to the outputs of the second and third R5 triggers, and the outputs of the second OR element are connected to the output channel of the logic block for a signal about the preservation of the pressure deviation sign, 'the inputs of the first AND element are connected to the outputs the second and third RS-triggers, and the output is with the inputs R of the first and fourth R9-triggers and the input S of the fifth RS-trigger, the inverse input of the second AND element is connected to the output of the second OR element, the direct input is> with the power line, and the output - a fifth input R -triggera RS, the output of which is connected to the output channel logical block for a signal of changing the sign of the pressure deviation and R inputs of the second and third R5-flops. 3. The system according to claim 2, characterized in that the third AND element is installed in the logical unit, the inputs of which are connected to the output of the first RS — Trigger and the first OR element, and the output is connected to the output channel of the logical unit for an off-program signal for opening the first tap. 4. The system according to claim 1, characterized in that the block for generating temporary control signals consists of cells of the same type in the number of controlled cranes, each of which contains a fourth element connected in series. And, an adjustable delay element, the sixth RS-trigger on input 5, as well as two parallel AND-OR chains, and the input channel of the unit for the signal on the presence of pressure deviation is connected to the first and second inputs of the fourth element And in the first cell and second inputs of the fourth elements And subsequent cells, the third input of each of the fourth elements AND is connected to the input channel of the unit for a signal about the preservation of the pressure deviation sign, the first input of the fourth element of Iv to each subsequent cell is connected to the output of the sixth RS-flip-flops of the previous cell, the input R of each of the sixth RS-flip-flops is connected. To the input channel of the block for a signal about the change of sign of the pressure deviation, the inputs of the elements And in the AND-OR chains are connected to the input channels of the block for signals about the sign of the pressure deviation and the outputs of the corresponding this cell of the sixth RS-triggers, and the other inputs of the OR elements in the AND-OR chains are connected to the input channels of the block for signals of off-program simultaneous opening and closing of taps, and the outputs of the chains are the outputs of the block, the input channel of the block the change of pressure deviations plate connected to the inputs R RS-flip-flops in each cell.