CN104831782A - Variable frequency water supply control system based on secondary pressurization water supply and working mode thereof - Google Patents
Variable frequency water supply control system based on secondary pressurization water supply and working mode thereof Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 238000001514 detection method Methods 0.000 claims abstract 3
- 238000006243 chemical reaction Methods 0.000 claims description 34
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- 230000011218 segmentation Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000007723 die pressing method Methods 0.000 claims description 3
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- 230000009897 systematic effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 239000008400 supply water Substances 0.000 description 7
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- 238000012937 correction Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B1/00—Methods or layout of installations for water supply
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
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Abstract
The invention discloses a variable frequency water supply control system based on secondary pressurization water supply and a working mode thereof and solves the problem that in the prior art, no system special for water supply is available. The variable frequency water supply control system based on the secondary pressurization water supply is characterized by comprising a first pump, a second pump, a third pump, a fourth pump, an auxiliary pump, pressure sensors and a control system body which is composed of the processor 6ES7214-2BD23-0XB8 and the programmable controller S7-200, wherein an M end of the programmable controller S7-200 is connected with inlet pressure and outlet pressure feedback signals; the processor 6ES7214-2BD23-0XB8 comprises detection output ends 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 1.0 and 1.1 and detection input ends I0.1, I0.2, I0.3, I0.4, I0.5 and I0.6. The system is simple in structure, low in cost, convenient to maintain, stable in equipment quality, high in intelligentization degree and simple to control, and by means of the system, defects existing in the prior art are effectively overcome.
Description
Technical field
The present invention relates to secondary booster water supply field, specifically, relate to a kind of variable frequency water supply control system based on secondary booster water supply and working method thereof.
Background technology
At present, do not have maturation on the market and the control system for the field of supplying water of specialty, in the work of reality, for the intelligence degree polar region of water management, and the debugging of part control appliance is complicated, and maintenance difficult, quality is unstable.
Therefore, researching and developing the control system for supplying water of a set of specialty, just becoming the important topic of those skilled in the art.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, provide a kind of and realize conveniently, adapt to various situation under the variable frequency water supply control system that supplies water of secondary booster.
To achieve these goals, the technical solution used in the present invention is as follows:
Based on the variable frequency water supply control system that secondary booster supplies water, comprise No. 1 pump, No. 2 pumps, No. 3 pumps, No. 4 pumps, attached pump, pressure sensors, and the control system be made up of processor 6ES7214-2BD23-0XB8 and programmable logic controller S7-200; Wherein, the M end of programmable logic controller S7-200 connects inlet pressure and outlet pressure feedback signal; Processor 6ES7214-2BD23-0XB8 includes and detects output 0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,1.0,1.1 and detect input I0.1, I0.2, I0.3, I0.4, I0.5, I0.6;
Detect output 0.0 and connect No. 1 pump frequency conversion relay B1, detect output 0.1 and connect No. 2 pump frequency conversion relay B2; Detect output 0.2 and connect No. 3 pump frequency conversion relay B3; Detect output 0.3 and connect No. 4 pump frequency conversion relay B3; Detect output 0.4 and connect No. 1 pump power frequency relay G1; Detect output 0.5 and connect No. 2 pump power frequency relay G2; Detect output 0.6 and connect No. 3 pump power frequency relay G3; Detect output 0.7 and connect No. 4 pump power frequency relay G4; Detect output 1.0 and be connected with attached pump frequency conversion relay B5;
Detect input I0.0 and connect startup optimization signal by switch; Detect input I0.1 and connect frequency conversion fault-signal by switch; Detect input I0.2 and connect No. 1 failure of pump signal by switch; Detect input I0.3 and connect No. 2 failure of pump signals by switch; Detect input I0.4 and connect No. 3 failure of pump signals by switch; Detect input I0.5 and connect No. 4 failure of pump signals by switch; Detect input I0.6 and connect attached pump fault-signal by switch.
Based on the working method of the variable frequency water supply control system that secondary booster supplies water, comprise the following steps:
(1) Working mode set: whether setting selects water tank, whether setting is selected without negative pressure equipment, sets inlet pressure, set a few pump participation work;
(2) setting sensor signal type and range;
(3) basic operating conditions is set: under-voltagely add the pump time, superpressure subtracts the pump time, be converted to the power frequency time;
(4) water pump sleep is carried out; Water pump sleep can reduce energy consumption effectively;
(5) intake pressure is detected by pressure sensor, the inlet pressure of detected pressures and setting is compared, if detected value is less than the setting value of pressure, then continue the excessive low water level protection time (being set by the excessive low water level protection time), system automatic cycle does not enter operation, until detect the setting value that intake pressure reaches pressure, perform step (6);
(6) Systematic selection segmentation divides die pressing type or timesharing dividing potential drop mode operation, have selected segmentation dividing potential drop and (pass through windowed time, six periods, six pressure, run by each pressure by each period, the method operational system is more energy-conservation, and can solve the contradiction between use water and pipe leakage); Select timesharing dividing potential drop as established, then system compares operation by a fixation pressure value;
(7) system is carried out booster and is shut down and detect: when several water pump oeprations at full load of setting being detected, and pressure does not reach and runs setting value 80%, and time delay 30 seconds, then system autostop reporting to the police, if detect normal, performs step (8);
(8) system is by detecting input I0.1, and whether I0.2, I0.3, I0.4, I0.5, I0.6 detect water pump power frequency situation normal, if normally, then this water pump and setting value match, and just enter four watering cycle patterns and attached little pump work pattern; If abnormal, then autostop reporting to the police;
(9) system is by detecting output 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 1.0 detect pump working situation, when detecting 0.4, 0.5, 0.6, 0.7, 1.0 do not work, and 0.0, 0.1, 0.2, a job is only had in 0.3, then the output valve V of the analog output of programmable logic controller S7-200 is less than sleep value, and continue the length of one's sleep, the output output valve A+ of programmable logic controller S7-200 meets setup pressure value, then system enters attached pump operation, the analog output of programmable logic controller S7-200 controls water pump to 1.0 and carries out control converting operation,
When 1.0 work and the output valve V of the analog output of programmable logic controller S7-200 be less than setting genus pump sleep frequency values, then enter system sleep mode automatically state;
When the output valve A+ value of output programmable logic controller S7-200 being detected is less than the attached pump sleep frequency values of setting, system starts automatically;
When the M end value of systems axiol-ogy programmable logic controller S7-200 is less than the force value setting and run, and the output valve V of the analog output of programmable logic controller S7-200 is 10V, then 1.0 ports exit, 0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7 participates in work system enters circulatory function;
(10) force value of testing pump and setup pressure value compare according to the mode of operation of setting by system:
When detected pressures value is less than the force value of setting operation, the output valve V of the analog output of programmable logic controller S7-200 constantly rises;
When detected pressures value is greater than the force value of setting operation, then the output valve V of the analog output of programmable logic controller S7-200 declines until detected pressures value equals setup pressure value;
When detected pressures value is less than setup pressure value and the output valve V of the analog output of programmable logic controller S7-200 reaches 10V and continues certain hour, then 0.0 disconnection, 0.4 closes, and 1 pump enters power frequency state, and 0.1 closes, then enters previous work state;
When detected pressures value is greater than setup pressure value always, and the output valve V of the analog output of programmable logic controller S7-200 is less than 0 certain hour, then and 0.4,0.5,0.6, first closedly in 0.7 first to open; By that analogy, constantly add and subtract 0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7, the output valve V of the analog output of adjustment programmable logic controller S7-200 is until detected value is identical with setup pressure value.
Compared with prior art, the present invention has following beneficial effect:
Not only structure is simple, with low cost, easy to maintenance in the present invention, equipment quality is stablized, and intelligence degree is high, it is simple to control, and effectively overcomes the defect that prior art exists, for it is applied on a large scale, has established solid foundation.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, and embodiments of the present invention include but not limited to the following example.
Embodiment
Present embodiments provide a kind of variable frequency water supply control system supplied water based on secondary booster, it comprises No. 1 pump, No. 2 pumps, No. 3 pumps, No. 4 pumps, attached pump, pressure sensors, and the control system be made up of processor 6ES7214-2BD23-0XB8 and programmable logic controller S7-200; Wherein, the M end of programmable logic controller S7-200 connects inlet pressure and outlet pressure feedback signal; Processor 6ES7214-2BD23-0XB8 includes and detects output 0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,1.0,1.1 and detect input I0.1, I0.2, I0.3, I0.4, I0.5, I0.6;
Detect output 0.0 and connect No. 1 pump frequency conversion relay B1, detect output 0.1 and connect No. 2 pump frequency conversion relay B2; Detect output 0.2 and connect No. 3 pump frequency conversion relay B3; Detect output 0.3 and connect No. 4 pump frequency conversion relay B3; Detect output 0.4 and connect No. 1 pump power frequency relay G1; Detect output 0.5 and connect No. 2 pump power frequency relay G2; Detect output 0.6 and connect No. 3 pump power frequency relay G3; Detect output 0.7 and connect No. 4 pump power frequency relay G4; Detect output 1.0 and be connected with attached pump frequency conversion relay B5;
Detect input I0.0 and connect startup optimization signal by switch; Detect input I0.1 and connect frequency conversion fault-signal by switch; Detect input I0.2 and connect No. 1 failure of pump signal by switch; Detect input I0.3 and connect No. 2 failure of pump signals by switch; Detect input I0.4 and connect No. 3 failure of pump signals by switch; Detect input I0.5 and connect No. 4 failure of pump signals by switch; Detect input I0.6 and connect attached pump fault-signal by switch.
Wherein, controller parameter list, as shown in the table:
Controller parameter function describes in detail:
P00----parameter modification password.
As P00=18, all parameters and setting value all can be revised, and as P00<>18, parameter and setting value can only be checked, can not revise.
P01----operating pressure setting value
P02----pump work mode.By the change of P02 parameter, controller can control separate unit or multiple stage pump work in different working methods;
P02=1 is a pump work pattern
P03=2 is that a variable frequency pump adds a general pump mode of operation.Now system definition B1 is variable frequency pump, and G1 is general pump.After B1 operating frequency reaches 50Hz, the time of time delay P04 second, if measured pressure value does not still reach default value, then system is directly connected G1 contact and is run by general pump input coefficient.If variable frequency pump frequency reduces to P23, its time >=P05 system still superpressure, then G1 general pump is turned off, still by regulating the operating frequency of B1 pump to carry out systems stabilisation pressure.
P03=3. be two pump circulating flexible start control models.Under this mode of operation, system definition B1, B2 are two pumps variable frequency work terminal, and G1, G2 are two pumps power frequency activating terminal.Under this pattern during system electrification work, first connect B1, start the work of 1# pump frequency conversion.When 1# pump frequency conversion is operated in 50Hz, time delay P04 second, if gaging pressure does not still reach setting value, is then disconnected by B1, connect G1, be power frequency duty by 1# pump by frequency conversion State Transferring, time delay 3 seconds, connects B2, starts 2# pump and carries out variable frequency work.When system overpressure, when 2# pump frequency conversion is operated in P23, time delay P05 second, system is superpressure still, is disconnected by G1, cuts off 1# pump power frequency, is carried out the pressure stability of variable frequency adjustment keeping system by 2# pump.
P03=4 is three pump circulating flexible start control models.Under this mode of operation, system definition B1, B2, B3 are three pump frequency conversion activating terminal, and G1, G2, G3 are three pump power frequency activating terminal.Under this pattern during system electrification work, first connect B1, start the work of 1# pump frequency conversion.When 1# pump frequency conversion is operated in 50Hz, time delay P04 second, if gaging pressure does not still reach setting value, is then disconnected by B1, connect G1, be power frequency duty by 1# pump by frequency conversion State Transferring, time delay 3 seconds, connects B2, starts 2# pump and carries out variable frequency work.When 2# pump frequency conversion is operated in 50Hz, time delay P04 second, if gaging pressure does not still reach setting value, is then disconnected by B2, connect G2, be power frequency duty by 2# pump by frequency conversion State Transferring, time delay 3 seconds, connects B3, starts 3# pump and carries out variable frequency work.When system overpressure, variable frequency pump variable frequency work is when P23, and time delay P05 second, system still superpressure, by the principle of first at first stopping, cuts off general pump, one by one until actual pressure is lower than setting value; When system is under-voltage, then start the pump of not devoting oneself to work in order one by one.
P03=5 is the mode of operation of a variable frequency pump, two general pumps.Under this mode of operation, system definition B1 is variable frequency work pump, and G1, G2 are two power frequency working barrels.After B1 operating frequency reaches 50Hz, the time of time delay P04 second, if gaging pressure does not still reach default value, then connect G1 directly to start 1# general pump and put into operation, when B1 operating frequency reaches again after 50Hz, the time of time delay P04 second, if gaging pressure does not still reach default value, then connect G2 startup 2# general pump to put into operation, system carrys out steady pressure by regulating the operating frequency of B1 pump.If superpressure appears in system, and frequency-converter power is at 0HZ, and this is P05 system second still superpressure, then first close 1# general pump, then superpressure at this moment P05 also superpressure, then closes 2# general pump.
P03=6 is the mode of operation of a variable frequency pump, three general pumps.Under this mode of operation, system definition B1 is variable frequency work pump, and G1, G2, G3 are three power frequency working barrels.After B1 operating frequency reaches 50Hz, the time of time delay P04 second, if gaging pressure does not still reach default value, then connect G1 directly to start 1# general pump and put into operation, when B1 operating frequency reaches again after 50Hz, the time of time delay P04 second, if gaging pressure does not still reach default value, then connect G2 startup 2# general pump to put into operation, if three pump oeprations at full load, after time delay P04 second, gaging pressure does not still reach setting value, then connect G3, start 3# general pump and put into operation.If variable frequency pump variable frequency work is when 0Hz, time delay P05 second, there is superpressure in system still overpressure system, then first close 1# general pump, then closes 2# general pump, finally closes 3# general pump.
P03=7 is drag five patterns: the mode of operation of a variable frequency pump, four general pumps.Under this mode of operation, system definition B1 is variable frequency work pump, and G1, G2, G3, G4 are four power frequency working barrels.After B1 operating frequency reaches 50Hz, the time of time delay P04 second, if gaging pressure does not still reach default value, then connect G1 directly to start 1# general pump and put into operation, when B1 operating frequency is again after 50Hz, the time of time delay P04 second, if gaging pressure does not still reach default value, then connect G2 startup 2# general pump to put into operation, by that analogy.If system still occurs superpressure when variable frequency pump frequency reduces to P23, then time delay >=P05 second, first close 1# general pump, as superpressure then still superpressure after time delay P05 second successively, then close 2# general pump, to the last close 4# general pump;
P03=8 is 4 pump loop start mode of operations, and manner of execution is with reference to P03=4;
P03----variable frequency pump switches to the time of general pump.When P02=1,3,4,8 time, the control model of controller is two pumps, three pumps and four pump circulating flexible start control models.In such a mode, when variable frequency pump work is to 50Hz, if now system pressure does not reach setting value, then variable frequency pump will be switched to general pump, the time length of this handoff procedure, the time set by P03 controls.According to the size of pump power, this time sets between 0.1-5 second usually;
P04----is under-voltage adds the pump time.When a pump work, if pressure does not reach setting value, when starting next pump, interlude is P04;
P05----superpressure subtracts the pump time.When multiple stage pump work, when system overpressure subtracts pump, interlude is P05;
P06----output voltage is selected.Control the voltage signal of frequency converter operating frequency.Have 0--5V and 0--10V two kinds to export to select, to adapt to the requirement of different brands frequency converter frequency input;
P07----input pickup type selecting.Controller can accept the pressure sensor input signal of three types.During P07=1, can directly access passive distance-transmission pressure gauge, or the 0-5V voltage output type pressure transmitter of active output.Connect 0-10V output type pressure transmitter to illustrate when ordering goods;
If connect the current mode pressure transmitter of 4-20mA (1-5V), need P07=2, now correctly will connect pressure transmitter by drawing to specifications;
P08----transducer range is selected.Controller can be accessed by the pressure sensor of different range, and this value is consistent with the maximum range of external sensor, otherwise, gaging pressure and actual pressure can be caused not to be inconsistent;
P09----sensor zero point corrects.General when cut-in pressure transmitter, this value is without the need to correcting.But when accessing distance-transmission pressure gauge, generally null pressure value has error, this parameter is exactly to eliminate zero point error;
P10----sensor full scale corrects.When actual pressure and controller gaging pressure have error, revise this error with P11.This parameters revision be the percent value of controller full scale;
Pump setting is changed in P11----timing;
The setting of pump time is changed in P12----timing;
Pump remaining time is changed in P13----timing.When regularly changing pumping function and being effective, this parameter is used for showing and how long also remains from changing pump, can only watch, can not revise;
P14----gain coefficient.Control system follows the tracks of the speed of pressure error.This value is larger, and the amplitude of controller D/A Drazin inverse is larger, and the speed of following the tracks of pressure change is also faster, easily produces overshoot;
P15----rejection coefficient.Be used for the parameter of regulating system pressure stability degree.Numerical value is more large, and more stability is better.As P15=0, control unrestraint effect;
P16----water pump sleep frequency.Without sleep function during P16=0.During P16>0, the still <=P16 when more than D/A output frequency value P21 minute, then lack of water or water requirement are very not little to think system, and this Time Controller will close frequency converter, stop supplying water.As gaging pressure <=(P01-P25), restart frequency converter water supply start;
The attached little pump of P17----controls.During P17=0, without attached little pumping function.When P02=1,3,4,8 and P17=1 time, attached little pump is variable frequency control.When system only has the work of a frequency conversion main pump, and after operating frequency <=P18, time delay P22 minute, close frequency conversion main pump, connect little pump frequency conversion contactor B5, start little pump frequency conversion work.Time delay P04 second after little pump work frequency reaches 50Hz, pressure does not also reach setting value, then close little pump, restart main pump.In this mode of operation, definition B5 terminal is the little pump control terminal of frequency conversion, and G5 terminal is the little pump control terminal of power frequency;
The attached little pump lowest operating frequency of P18----.In system cloud gray model after the operating frequency of frequency converter was lower than the lower-frequency limit P22 set by P18 minute, lack of water or water supply volume are very not little to think system, are devoted oneself to work by attached little pump;
P19----excessive low water level protection minimum pressure.In system cloud gray model, as gaging pressure <=P19, and during >=P20 running time, think system lack of water or failure of pump, controller cuts off all output, and PV window replaces 1 second display failure code Er1 and measured value.Now only have controller power source to turn off and just can exit this state, rerun;
Setting running time of P20----excessive low water level protection.With P19 with the use of.P20=0 is without excessive low water level protection function.Each time value of P20 parameter represented for 5 seconds;
P21----water pump sleep latency.Work as P16>0, and more than output frequency P21 minute still <=P21, then start water pump sleep action;
The attached little pump of P22----drops into the stand-by period.Work as P17=1, and system only has the work of a frequency conversion main pump and operating frequency <=P18, after P22 minute, start attached little pump work;
The minimum output frequency setting of P23----.Be used for ensureing the minimum speed of water pump;
P24----D/A exports and selects to control, and is used for control simulation to export as positive control or revertive control;
Again play the pressure divergence of pump after P25----sleep, after sleep, current measured pressure value <=(resets pump working time (P01-P25);
P26----timing open and close machine controls.P26=0, without timing open and close machine function.P26=1, timing constant DP control; When timing start-up works, system with the pressure of P01 for benchmark carries out Isobarically Control; P26=2, divides pressure-controlled to supply water at times; When system boot works, the setting pressure that L1-L6 six timing start-up period difference corresponding P28-P33 six are different supplies water;
L1-----first available machine time H1-----first unused time;
L2-----second available machine time H2-----second unused time;
L3-----the 3rd available machine time H3-----the 3rd unused time;
P27 (L0)----system current real-time clock.
L4-----the 4th available machine time H4-----the 4th unused time;
L5-----the 5th available machine time H5-----the 5th unused time;
L6-----the 6th available machine time H6-----the 6th unused time;
P28----first starts shooting the pressure of supply water setting value of period;
P29----second starts shooting the pressure of supply water setting value of period;
The pressure of supply water setting value of P30----the 3rd start period;
The pressure of supply water setting value of P31----the 4th start period;
The pressure of supply water setting value of P32-----the 5th start period;
The pressure of supply water setting value of P33-----the 6th start period;
P34----upscale protection pressure set points.As gaging pressure >=P34, disconnection is closed completely in run signal all after 2 seconds and contact;
P35----frequency converter initiation culture; 1, the minimum output frequency of P23, with P58 variable frequency starting frequency, when one of them is non-vanishing, another forbids arranging (being fixed as zero), namely one can only be had to work simultaneously; 2, when P35 is non-vanishing, when namely variable frequency starting frequency works, after display D/A reduces to 07 seconds, RUN disconnects, when D/A is greater than zero, and RUN demand working;
P36-----booster stopping function: mode is all pump power frequency operations 20 seconds, and actual pressure does not still reach setting pressure 80%, then run stopping one by one, and show booster stopping;
P37-----pressure divergence value 0.1,0.2,0.3,0.4,0.5;
This plane No. of P38-----is selected; During multi computer communication, be used for setting the plane No. of extension set;
P39----retention parameter 1; Internal system uses (timing operation time, P61=0 is invalid);
P40----retention parameter 2; Internal system uses (during P62=18, can set the value of P61);
P41----fluid level transmitter input signal types Selection parameter item;
P42----fluid level transmitter input signal measurement range selection parameter item;
P43-----fluid level transmitter input signal zero error correction parameter item;
P44----fluid level transmitter input signal full scale error correction parameter item.
Based on the working method of the variable frequency water supply control system that secondary booster supplies water, comprise the following steps:
(1) Working mode set: whether setting selects water tank, whether setting is selected without negative pressure equipment, sets inlet pressure, set a few pump participation work;
(2) setting sensor signal type and range;
(3) basic operating conditions is set: under-voltagely add the pump time, superpressure subtracts the pump time, be converted to the power frequency time;
(4) water pump sleep is carried out; Water pump sleep can reduce energy consumption effectively;
(5) intake pressure is detected by pressure sensor, the inlet pressure of detected pressures and setting is compared, if detected value is less than the setting value of pressure, then continue the excessive low water level protection time (being set by the excessive low water level protection time), system automatic cycle does not enter operation, until detect the setting value that intake pressure reaches pressure, perform step (6);
(6) Systematic selection segmentation divides die pressing type or timesharing dividing potential drop mode operation, have selected segmentation dividing potential drop and (pass through windowed time, six periods, six pressure, run by each pressure by each period, the method operational system is more energy-conservation, and can solve the contradiction between use water and pipe leakage); Select timesharing dividing potential drop as established, then system compares operation by a fixation pressure value;
(7) system is carried out booster and is shut down and detect: when several water pump oeprations at full load of setting being detected, and pressure does not reach and runs setting value 80%, and time delay 30 seconds, then system autostop reporting to the police, if detect normal, performs step (8);
(8) system is by detecting input I0.1, and whether I0.2, I0.3, I0.4, I0.5, I0.6 detect water pump power frequency situation normal, if normally, then this water pump and setting value match, and just enter four watering cycle patterns and attached little pump work pattern; If abnormal, then autostop reporting to the police;
(9) system is by detecting output 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 1.0 detect pump working situation, when detecting 0.4, 0.5, 0.6, 0.7, 1.0 do not work, and 0.0, 0.1, 0.2, a job is only had in 0.3, then the output valve V of the analog output of programmable logic controller S7-200 is less than sleep value, and continue the length of one's sleep, the output output valve A+ of programmable logic controller S7-200 meets setup pressure value, then system enters attached pump operation, the analog output of programmable logic controller S7-200 controls water pump to 1.0 and carries out control converting operation,
When 1.0 work and the output valve V of the analog output of programmable logic controller S7-200 be less than setting genus pump sleep frequency values, then enter system sleep mode automatically state;
When the output valve A+ value of output programmable logic controller S7-200 being detected is less than the attached pump sleep frequency values of setting, system starts automatically;
When the M end value of systems axiol-ogy programmable logic controller S7-200 is less than the force value setting and run, and the output valve V of the analog output of programmable logic controller S7-200 is 10V, then 1.0 ports exit, 0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7 participates in work system enters circulatory function;
(10) force value of testing pump and setup pressure value compare according to the mode of operation of setting by system:
When detected pressures value is less than the force value of setting operation, the output valve V of the analog output of programmable logic controller S7-200 constantly rises;
When detected pressures value is greater than the force value of setting operation, then the output valve V of the analog output of programmable logic controller S7-200 declines until detected pressures value equals setup pressure value;
When detected pressures value is less than setup pressure value and the output valve V of the analog output of programmable logic controller S7-200 reaches 10V and continues certain hour, then 0.0 disconnection, 0.4 closes, and 1 pump enters power frequency state, and 0.1 closes, then enters previous work state;
When detected pressures value is greater than setup pressure value always, and the output valve V of the analog output of programmable logic controller S7-200 is less than 0 certain hour, then and 0.4,0.5,0.6, first closedly in 0.7 first to open; By that analogy, constantly add and subtract 0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7, the output valve V of the analog output of adjustment programmable logic controller S7-200 is until detected value is identical with setup pressure value.
According to above-described embodiment, just the present invention can be realized well.What deserves to be explained is; under prerequisite based on above-mentioned design principle; for solving same technical problem; even if some making on architecture basics disclosed in this invention are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the present invention, therefore it also should in protection scope of the present invention.
Claims (5)
1. based on the variable frequency water supply control system that secondary booster supplies water, it is characterized in that, comprise No. 1 pump, No. 2 pumps, No. 3 pumps, No. 4 pumps, attached pump, pressure sensors, and the control system be made up of processor 6ES7214-2BD23-0XB8 and programmable logic controller S7-200; Wherein, the M end of programmable logic controller S7-200 connects inlet pressure and outlet pressure feedback signal; Processor 6ES7214-2BD23-0XB8 includes and detects output 0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,1.0,1.1 and detect input I0.1, I0.2, I0.3, I0.4, I0.5, I0.6;
Detect output 0.0 and connect No. 1 pump frequency conversion relay B1, detect output 0.1 and connect No. 2 pump frequency conversion relay B2; Detect output 0.2 and connect No. 3 pump frequency conversion relay B3; Detect output 0.3 and connect No. 4 pump frequency conversion relay B3; Detect output 0.4 and connect No. 1 pump power frequency relay G1; Detect output 0.5 and connect No. 2 pump power frequency relay G2; Detect output 0.6 and connect No. 3 pump power frequency relay G3; Detect output 0.7 and connect No. 4 pump power frequency relay G4; Detect output 1.0 and be connected with attached pump frequency conversion relay B5;
Detect input I0.0 and connect startup optimization signal by switch; Detect input I0.1 and connect frequency conversion fault-signal by switch; Detect input I0.2 and connect No. 1 failure of pump signal by switch; Detect input I0.3 and connect No. 2 failure of pump signals by switch; Detect input I0.4 and connect No. 3 failure of pump signals by switch; Detect input I0.5 and connect No. 4 failure of pump signals by switch; Detect input I0.6 and connect attached pump fault-signal by switch.
2., as claimed in claim 1 based on the working method of the variable frequency water supply control system of secondary booster water supply, it is characterized in that, comprise the following steps:
(1) Working mode set: whether setting selects water tank, whether setting is selected without negative pressure equipment, sets inlet pressure, set a few pump participation work;
(2) setting sensor signal type and range;
(3) basic operating conditions is set: under-voltagely add the pump time, superpressure subtracts the pump time, be converted to the power frequency time;
(4) water pump sleep is carried out;
(5) intake pressure is detected by pressure sensor, the inlet pressure of detected pressures and setting is compared, if detected value is less than the setting value of pressure, then continue the excessive low water level protection time (being set by the excessive low water level protection time), system automatic cycle does not enter operation, until detect the setting value that intake pressure reaches pressure, perform step (6);
(6) Systematic selection segmentation divides die pressing type or timesharing dividing potential drop mode operation.
3. the working method of the variable frequency water supply control system based on secondary booster water supply according to claim 2, it is characterized in that, also comprise step (7) system and carry out booster shutdown detection: when several water pump oeprations at full load of setting being detected, and pressure does not reach operation setting value 80%, and time delay 30 seconds, then system autostop reporting to the police, if detect normal, performs step (8);
(8) system is by detecting input I0.1, and whether I0.2, I0.3, I0.4, I0.5, I0.6 detect water pump power frequency situation normal, if normally, then this water pump and setting value match, and just enter four watering cycle patterns and attached little pump work pattern; If abnormal, then autostop reporting to the police.
4. the working method of the variable frequency water supply control system based on secondary booster water supply according to claim 3, it is characterized in that, also comprise step (9) system by detecting output 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 1.0 detect pump working situation, when detecting 0.4, 0.5, 0.6, 0.7, 1.0 do not work, and 0.0, 0.1, 0.2, a job is only had in 0.3, then the output valve V of the analog output of programmable logic controller S7-200 is less than sleep value, and continue the length of one's sleep, the output output valve A+ of programmable logic controller S7-200 meets setup pressure value, then system enters attached pump operation, the analog output of programmable logic controller S7-200 controls water pump to 1.0 and carries out control converting operation,
When 1.0 work and the output valve V of the analog output of programmable logic controller S7-200 be less than setting genus pump sleep frequency values, then enter system sleep mode automatically state;
When the output valve A+ value of output programmable logic controller S7-200 being detected is less than the attached pump sleep frequency values of setting, system starts automatically;
When the M end value of systems axiol-ogy programmable logic controller S7-200 is less than the force value setting and run, and the output valve V of the analog output of programmable logic controller S7-200 is 10V, then 1.0 ports exit, 0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7 participates in work system enters circulatory function.
5. the working method of the variable frequency water supply control system based on secondary booster water supply according to claim 4, is characterized in that, also comprises step (10) system and the force value of testing pump and setup pressure value is compared according to the mode of operation of setting:
When detected pressures value is less than the force value of setting operation, the output valve V of the analog output of programmable logic controller S7-200 constantly rises;
When detected pressures value is greater than the force value of setting operation, then the output valve V of the analog output of programmable logic controller S7-200 declines until detected pressures value equals setup pressure value;
When detected pressures value is less than setup pressure value and the output valve V of the analog output of programmable logic controller S7-200 reaches 10V, then 0.0 disconnection, 0.4 closes, and 1 pump enters power frequency state, and 0.1 closes, then enters previous work state;
When detected pressures value is greater than setup pressure value always, and the output valve V of the analog output of programmable logic controller S7-200 is less than 0, then and 0.4,0.5,0.6, first closedly in 0.7 first to open; By that analogy, constantly add and subtract 0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7, the output valve V of the analog output of adjustment programmable logic controller S7-200 is until detected value is identical with setup pressure value.
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