CN205475474U - Automatic water supply control system of inverter type constant voltage - Google Patents
Automatic water supply control system of inverter type constant voltage Download PDFInfo
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- CN205475474U CN205475474U CN201620037239.0U CN201620037239U CN205475474U CN 205475474 U CN205475474 U CN 205475474U CN 201620037239 U CN201620037239 U CN 201620037239U CN 205475474 U CN205475474 U CN 205475474U
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Abstract
The utility model relates to an automatic water supply control system of inverter type constant voltage belongs to the automatic control engineering field. The utility model discloses a PLC, converter, level sensor, analog output module, pressure sensor, contactor switching circuit, water pump, motor, manual control module, analog output module, converter and manual control module are connected with PLC respectively, and the output signal that level sensor detected is connected with the analog output module, and pressure sensor's output signal is connected with the PID module of analog output module and converter respectively, and the PID module of PLC and converter is connected to the contactor switching circuit respectively, and the contactor switching circuit is connected with the motor, the water supply of motor drive water pump operation. The utility model provides a water pressure to appear not enough in resident's water peak period, the too big problem of ebb phase water pressure realizes constant pressure water supply, makes the resource obtain make full use of, reaches energy -concerving and environment -protective purpose.
Description
Technical field
This utility model relates to a kind of frequency conversion type constant-pressure water feeding system control system, belongs to automatic control technology field.
Background technology
Along with developing rapidly of society, city is constantly extended, and urban population is continuously increased, and town dweller's water consumption is the most more
Add, bring great pressure to waterworks, according to used water system situation, the automatization's journey that there is currently for water factory
Spending the highest, energy consumption is relatively big, for meeting the life use of growing number of resident, and the original old equipment over loading fortune of tap water
Make, the situation that reliability is greatly reduced, simultaneously in the stability being difficult to ensure that water supply with the peak period of water.Along with people are to confession
The raising day by day that water requires, in conjunction with Developing rapid constant pressure water supply technology and Field Bus Control Technology, to sending water
Pumping plant is monitored realizing constant pressure water supply and monitoring whole waterworks field apparatus in real time and real-time data acquisition.Cause
This is necessary for transforming the correlation technique of water factory, to realize efficient, stable, the reliable purpose that supplies water.Realize user permanent
Pressure supplies water has become the inevitable choice of Running-water Company, and simultaneity factor needs to adapt to ever-increasing supply equipment and accesses.
Summary of the invention
This utility model provides a kind of frequency conversion type constant-pressure water feeding system control system, is used for solving existing urbanite anxious
Speed increases supply water difficulty and the problem for water unstable brought, and old supply equipment supplies water with low peak period in the peak period of resident
Mode is unalterable so that peak period occurs that hydraulic pressure is not enough, and low peak period hydraulic pressure is excessive, it is impossible to ensures constant pressure water supply, causes simultaneously
The problem of power resource serious waste.
The technical solution of the utility model is: a kind of frequency conversion type constant-pressure water feeding system control system, including PLC1, converter
2, liquid level sensor 3, analog output module 4, pressure transducer 5, catalyst switching circuit 6, water pump 7, motor 8, manually control
Molding block 9；
Described analog output module 4, converter 2 are connected with PLC1 respectively with manual control module 9, liquid level sensor
3 detection output signals be connected with analog output module 4, pressure transducer 5 detect output signal respectively with analog quantity
Output module 4 is connected with the PID module of converter 2, and the PID module of PLC1 and converter 2 is connected respectively to catalyst switching
Circuit 6, catalyst switching circuit 6 is connected with motor 8, and motor 8 drives water pump 7 operating to supply water.
Also include PROFIBUS fieldbus 10 and PC Monitor Computer Control System 11；Wherein, PC Monitor Computer Control System 11
It is connected with PLC1 by PROFIBUS fieldbus 10.
Operation principle of the present utility model is:
Ensure that the pressure supply of the outlet of whole water supply webmaster is constant thus ensure the water consumption of user at least favorable point
Meet.
Multiple PLC are connected with upper monitoring main frame by frequency conversion type constant-pressure water feeding system control system by PROFIBUS, then
It is connected by other each underclad portion of corresponding PLC1, the output signal of liquid level sensor 3 detection and analog output module 4 phase
Connect, wherein: the pressure change that pressure transducer 5 gathers on water system water outlet webmaster, then changing value is converted into standard
The signal of telecommunication, then this signal is respectively transmitted to the PID module of analog output module 4 and converter 2.Converter 2 is accepting
After these signals, utilize PID module that it is carried out the process of pid algorithm, finally change into corresponding required control and believe
Number frequency (this is used to be adjusted the speed of motor).Signal after converter process, a part is pre-as function
If value, and pass to PLC.PLC utilizes these signals to the judgement of the switch of A.C. contactor group and control.PLC1 and converter
The PID module of 2 is connected respectively to catalyst switching circuit 6), catalyst switching circuit 6) directly it is connected with motor 8 pump group, electricity
Machine 8 drives water pump 7 operating to supply water, and directly determines the running status of electric-motor pump group.
Liquid level sensor 3 is mainly responsible for the water level depth of detection water supply pool, and in most cases, these signals are simply made
Use for emergency measure.Liquid level sensor 3 signal sends PLC1 to.Its objective is whether PLC1 judges pond according to this signal
In normal safety line, prevent from being evacuated, by feed cistern, the danger overflowed with water and reporting to the police.
The input of the manual control signal of manual control module 9 is used to directly control the operation of electric-motor pump group, and system exists
Time under the pattern of Non-follow control, manual control signal (including opening and stopping electric-motor pump group) passes through with the highest priority
PLC directly controls the start and stop of water pump assembly.When the Automatic Control module of system switching, believe according to the input of each sensor
Number, signal is just automatically obtained the purpose of Isobarically Control.Now, when converter is working properly, pressure signal passes through pressure sensing
Device 5, sends the PID that converter 2 is built-in to, and after PID arithmetic, output signal controls the output frequency of converter, thus controls
The rotating speed of water pump and then the pressure almost constant of holding water supply line.When user's water consumption is big, webmaster loine pressure declines, frequency conversion
Device frequency just raises, and pump rotary speed is accelerated, otherwise, frequency declines water pump deceleration fortune surname, thus maintains constant pressure water supply.Work as water consumption
During more than the maximum output of a water pump, carry out the control to catalyst switching circuit by the internal control of PLC1 so that it is
Put into a water pump again.Same principle, PLC1, according to the size of water consumption, can automatically determine the water pump number of units of input.
When converter breaks down, system stops above-mentioned automatic water-supply mode, and the corresponding power frequency that starts is run automatically
(program is a kind of reserved regimen to way of supplying water, and the system overwhelming majority time all should operate in frequency-changing pressure stabilizing operation side
Formula), now the signal of hydraulic pressure sensor directly inputs PLC1, PLC1 the scope carrying out signal judges, thus determines when increase
When pump (can only be power frequency operation), subtract pump.Thus realize the constant-pressure water feeding system of approximation.
The upper monitoring main frame Real-time Collection field data that connected by PROFIBUS and field apparatus is supervised in real time
Control, it is achieved the purpose of constant pressure water supply.
Wherein, being designed as of electric power system circuit:
[1] system uses transformer regulating function to carry out the conversion of voltage.Three-phase electricity industrial power 380V/50Hz
Source changes into the 220V power supply of PLC and other equipment requirements.Certainly, the electricity to the 380V that converter and water pump loop feature require
Source, can be directly accessed by 380V power supply.When certainly accessing, a total input-wire air switch (QF1) is applied to ensure system
Safety.
[2] when at exterior power supply plant short supply interruption, system remains to maintain certain time, between here system uses not
The measure of power-off source UPS.Being in charged state when UPS is flat, when system dead electricity, UPS can automatically switch to output state, maintains
The power supply of controller
[3] for ensureing the anti-interference function between electric power system, one will be sufficiently in view of the good earth of circuit, and two are
The secondary concatenation connection twisted-pair feeder to be used of transformator.Several transformator is also used respectively the equipment of required relevant voltage to be carried out
Power supply, is so conducive to eliminating the impact between each power supply.
The EM277 of the field bus technique (PROFIBUS DP) in described frequency conversion type constant-pressure water feeding system control system
PROFIBUS DP communication module is used for being connected to S7 200 PROFIBUS DP network.EM277 is by DP COM1 even
Receive a main website in PROFIBUS DP network, be connected to S7 200CPU module by serial i/O bus.System is used
PROFIBUS agreement is communicated with the monitoring system of host computer by PROFIBUS bus network.
Described frequency conversion type constant-pressure water feeding system control system is calculated by corresponding parameter: described PLC1 is S7's 200
CPU226 is as the control unit of system；The Model of pump of ChangNing Industry Co., Ltd, Beijing selected by water pump 7:
350S26；The motor model of Fu'an City Dasheng Electric Machine Co., Ltd forever: Y315M-4 selected by motor 8；According to selected motor
Capacity, converter 2 selects model: MM430 converter；Liquid level sensor 3 selects the liquid of Jiangmen city Li De Electronics Co., Ltd.
Level sensor model: LD600G A 1 3.5m 5m；Pressure transducer 5 selects the pressure of Deng Fang Shanghai Electronics Co., Ltd.
Sensor model number: JVPL 10；
Other aspect lime lights of system control thought:
[1] design of control system, need to consider that, when system puts into, the operation number of units of water pump controls all the time at 1 ~ 3
In the range of (design require needs).When the requirement of input exceedes this scope, it is desirable to when pump runs or stops, system is just entered
Row is reported to the police and the carrying out stoping which.Realize this technology requirement, as long as by the running status of electric-motor pump group is supervised
Control, system just can carry out the restriction of water pump operation number of units to this.
[2] in view of system lifetim, the most each motor and the life-span running the time of water pump.In the present system, I
The opening sequence of each motor and water pump is taked the strategy of " first stopping first to open, full cut-off first opens 1 "；Same their order of stopping is just
It it is the strategy of " first open and first stop ".Here, the mode of inquiry is used to realize.The thought that the mode of inquiry realizes is first to determine
The running status (including variable frequency starting, power frequency startup, stopping three kinds) of each pump, then determines to open or stop water pump according to this
Number.
[3] power frequency constant voltage auto-controll operation mode is as a kind of alternative scheme, for preventing from stopping a hydraulic pressure at water pump
Not enough and establish the so-called switching vibration that a hydraulic pressure overshoot causes newly.Control system uses on-line identification hydraulic pressure control interval
Control program. the most only cross control interval. system ability generation action, water pump just can switch over.The setting of control interval
Scheme: assume that current hydraulic pressure control interval is for [X01 X02] X01 < SP < X02.We can set (program when just starting
Initialize assignment time) interval be [0.95SP, 1.05SP], SP is webmaster hydraulic pressure desired value.When webmaster hydraulic pressure exceedes this district
Between time, through certain time delay.System starts action (or establish newly or stop a water pump).After action, current pipe pressure signal SP1
After A/D changes, passed back PLC by pressure transducer, the most then with SP for according to re-establishing control interval for [X11, X12], and
Value as the following formula: X11=SP-1.05 | △ p |, X12=SP+1.05 | △ p |, △ p=SP1-SP；
Therefore, system often carries out Primary pumps switching, and hydraulic pressure control of PLC online modification is interval thus avoids switching and shakes
Swing.
Job step of the present utility model is as follows:
Step1, set the interval of pipe pressure parameter objectives value by PLC1 as [0.95SP, 1.05SP]；
Step2, judge that manual mode or automatic mode run:
Step2.1 if manual mode, then starts manual handle module 9:PLC1 and detects that liquid level sensor 3 is anhydrous
Position alarm signal；If there being water-level alarm signal, then carrying out termination of pumping control, if without water level alarm signal, then detection pressure passes
Sensor 5 is with or without superpressure signal；If there being superpressure signal, then carrying out termination of pumping control, if without superpressure signal, then detection water pump 7 has
Without stopping signal；If there being water pump 7 to stop signal, then carrying out termination of pumping control, otherwise detection hands opens pump signal: if there being hands to open pump
Signal, then carry out establishing pump newly and control；Then step Step3 is performed；Wherein, without superpressure signal, represent that current pipe pressure parameter value does not has
Have more than the safety value that water pipe can bear；There is hands to open pump signal, represent that there is artificial triggering starts water pump control key；There is stopping letter
Number, represent that there is artificial triggering stops water pump control key；
Step2.2 is if automatic mode, and PLC1 then carries out the connection of converter 2 and judges that converter 2 has fault-free to deposit
:
Step2.2.1, when converter 2 is faulty, then perform automatic power frequency constant voltage processing module:
Automatically the processing procedure of power frequency constant voltage processing module is:
The current pipe gathered pressure parameter value is carried out A/D through analog output module 4 by Step2.2.1.1, pressure transducer 5
It is sent to after conversion to PLC1；
Whether Step2.2.1.2, PLC1 judge to press parameter value in setting interval through the current pipe of A/D conversion:
If, system mode is constant, then performs step Step3；
If not existing, then judge through the size that the current pipe pressure parameter value of A/D conversion is interval with setting: if less than under interval
Limit then time delay sequentially power frequency and increase a water pump number opened；Sequentially reduce by a unlatching if greater than the interval upper limit then time delay
Water pump number, when the water pump 7 of work only remains one, then performs step Step3；
Step2.2.1.3, time delay change hydraulic pressure set point, and by current pipe pressure parameter value SP1 by pressure transducer 5 warp
Analog output module 4 passes PLC1 back after carrying out A/D conversion, meanwhile, set up pipe pressure parameter objectives value interval for [X11,
X12]；Wherein, X11=SP-1.05 | △ p |, X12=SP+1.05 | △ p |, △ p=SP1-SP；
Step2.2.1.4, interval according to the setting after updating, perform step Step2.2.1.2；
Wherein, during the automatic power frequency constant voltage processing module of first entrance, 1 pump working is set in power frequency state；
Step2.2.2, when converter 2 fault-free, PLC1 judges that the frequency of converter 2 is whether in the range of setting:
If Step2.2.2.1 exists, then execution automatic frequency-conversion constant voltage processing module:
The processing procedure of automatic frequency-conversion constant voltage processing module is:
Step2.2.2.1.1, pressure transducer 5 gather current pipe pressure parameter value as feedback signal input converter 2 mould
Intend input terminal；
Step2.2.2.1.2, controlled by the PID of converter 2, current pipe pressure parameter value is made comparisons with SP: if greatly
In, converter 2 reduces frequency and drives motor 8 rotating speed of water pump 7 to reduce, if it is lower, converter 2 improves frequency and drives water
Motor 8 rotating speed of pump 7 improves；
Step2.2.2.1.3, repeated execution of steps Step2.2.2.1.1-step Step2.2.2.1.2, until current pipe
Pressure parameter value is equal with SP, performs step Step3；
Wherein, during first entrance automatic frequency-conversion constant voltage processing module, open converter 2 and 1 pump variable frequency zero-turn speed opens
Dynamic；
Step2.2.2.2 is if it was not then perform in accordance with the following steps:
Step2.2.2.2.1, pressure transducer 5 gather current pipe pressure parameter value as feedback signal input converter 2 mould
Intend input terminal；
Step2.2.2.2.2, controlled by the PID of converter 2, current pipe pressure parameter value made comparisons with SP:
Step2.2.2.2.2.1 is if it is less, perform under-voltage processing module, and the processing procedure of under-voltage processing module is:
Detect the presence of variable frequency pump to run:
If it has, then judge which pump variable frequency runs, frequency conversion is changed into power frequency operation, perform step Step3；
If nothing, then detect the presence of general pump and run: if it has, then judge the power frequency operation which platform water pump is finally opened,
And a pump variable frequency runs after starting this water pump；If nothing, then start a pump variable frequency and run, perform step Step3；
Step2.2.2.2.2.2 is if it is greater, then perform superpressure processing module, and the processing procedure of superpressure processing module is:
Detect the presence of variable frequency pump to run:
If it has, then judge which pump variable frequency runs, variable frequency pump is turned off, perform step Step3；
If nothing, the most sequentially judge the power frequency operation which platform water pump is opened at first, after closing this water pump, start this pump frequency conversion
Run, perform step Step3；
Step3, fault detect:
If Step3.1 system jam, then performing fault processing module, fault processing module processing procedure is:
It is first determined whether water level is not enough or overfill: if not enough or overfill, then close whole system, proceed to report to the police simultaneously
Program sends water level signal and reports to the police；
Next judges whether converter 2 whether fault: if it is, close automatic frequency-conversion constant voltage processing module, and start
Automatically power frequency constant voltage processing module, proceeds to alert program simultaneously and sends frequency converter failure warning；
The detection if Step3.2 system does not break down, then, then circulation performs the whole mistake of step Step1 to Step3
Journey.
The beneficial effects of the utility model are: use the most more advanced variable-frequency control technique, pid control mode and PLC
Control technology is carried out, and to realize constant pressure water supply, has good speed adjustment features, energy-saving effect is notable, operation process is safe and reliable
Advantage.Solve urbanite water consumption peak period and occur that hydraulic pressure is not enough, the problem that low peak period hydraulic pressure is excessive, it is achieved constant pressure water supply, make money
Being fully used in source, reaches the purpose of energy-conserving and environment-protective.Use field bus control system (FCS), open system, exchange
Property, unified configuration, decentralised control, improve the reliability of system, controllability and maintainability, and solve water factory and be correlated with in the future
The technological improvement of technical process, the increase of the various on-the-spot controlled plant of PROCESS FOR TREATMENT department, and field apparatus actual range
Increase, the problem that the dispersion of whole system will be greatly increased.By original manually operated many equipment access systems, real
Show and automatically controlled, greatly reduced the demand of personnel.Control system uses variable frequency water supply and two kinds of water supply sides of power frequency water supply
Formula, it is ensured that the normal water supply of special circumstances, ensures the normal domestic water of resident to greatest extent.
Accompanying drawing explanation
Fig. 1 is frequency conversion type constant voltage automatic control system principle of compositionality figure of the present utility model；
Fig. 2 is electric power system circuit diagram of the present utility model；
Fig. 3 is catalyst switching circuit schematic diagram of the present utility model；
Each label: 1-PLC in figure；2-converter；3-liquid level sensor；4-analog output module；5-pressure transducer；
6-catalyst；7-water pump, 8-motor, 9-manual control module, 10-PROFIBUS fieldbus, 11-PC ipc monitor system
System.
Detailed description of the invention
Embodiment 1: as Figure 1-3, a kind of frequency conversion type constant-pressure water feeding system control system, including PLC1, converter 2,
Liquid level sensor 3, analog output module 4, pressure transducer 5, catalyst switching circuit 6, water pump 7, motor 8, Non-follow control
Module 9；
Described analog output module 4, converter 2 are connected with PLC1 respectively with manual control module 9, liquid level sensor
3 detection output signals be connected with analog output module 4, pressure transducer 5 detect output signal respectively with analog quantity
Output module 4 is connected with the PID module of converter 2, and the PID module of PLC1 and converter 2 is connected respectively to catalyst switching
Circuit 6, catalyst switching circuit 6 is connected with motor 8, and motor 8 drives water pump 7 operating to supply water.
Also include PROFIBUS fieldbus 10 and PC Monitor Computer Control System 11；Wherein, PC Monitor Computer Control System 11
It is connected with PLC1 by PROFIBUS fieldbus 10.
Embodiment 2: as Figure 1-3, a kind of frequency conversion type constant-pressure water feeding system control system, including PLC1, converter 2,
Liquid level sensor 3, analog output module 4, pressure transducer 5, catalyst switching circuit 6, water pump 7, motor 8, Non-follow control
Module 9；
Described analog output module 4, converter 2 are connected with PLC1 respectively with manual control module 9, liquid level sensor
3 detection output signals be connected with analog output module 4, pressure transducer 5 detect output signal respectively with analog quantity
Output module 4 is connected with the PID module of converter 2, and the PID module of PLC1 and converter 2 is connected respectively to catalyst switching
Circuit 6, catalyst switching circuit 6 is connected with motor 8, and motor 8 drives water pump 7 operating to supply water.
Above in conjunction with accompanying drawing, detailed description of the invention of the present utility model is explained in detail, but this utility model is not
It is limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art are possessed, it is also possible to without departing from this practicality
On the premise of novel objective, various changes can be made.
Claims (2)
1. a frequency conversion type constant-pressure water feeding system control system, it is characterised in that: include PLC(1), converter (2), level sensing
Device (3), analog output module (4), pressure transducer (5), catalyst switching circuit (6), water pump (7), motor (8), manually
Control module (9)；
Described analog output module (4), converter (2) and manual control module (9) respectively with PLC(1) be connected, liquid level passes
The output signal that sensor (3) detects is connected with analog output module (4), and the output signal that pressure transducer (5) detects is divided
Be not connected with the PID module of analog output module (4) and converter (2), PLC(1) and the PID module of converter (2) divide
Not being connected to catalyst switching circuit (6), catalyst switching circuit (6) is connected with motor (8), and motor (8) drives water pump (7)
Operating is supplied water.
Frequency conversion type constant-pressure water feeding system control system the most according to claim 1, it is characterised in that: also include PROFIBUS
Fieldbus (10) and PC Monitor Computer Control System (11)；Wherein, PC Monitor Computer Control System (11) is on-the-spot by PROFIBUS
Bus (10) and PLC(1) it is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620037239.0U CN205475474U (en) | 2016-01-15 | 2016-01-15 | Automatic water supply control system of inverter type constant voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620037239.0U CN205475474U (en) | 2016-01-15 | 2016-01-15 | Automatic water supply control system of inverter type constant voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205475474U true CN205475474U (en) | 2016-08-17 |
Family
ID=56668646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620037239.0U Expired - Fee Related CN205475474U (en) | 2016-01-15 | 2016-01-15 | Automatic water supply control system of inverter type constant voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205475474U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507378A (en) * | 2016-01-15 | 2016-04-20 | 昆明理工大学 | Frequency-conversion-type automatic constant-pressure water supplying system and method |
| CN108049453A (en) * | 2017-10-31 | 2018-05-18 | 江苏省水利勘测设计研究院有限公司 | A kind of south water to north water transfer system Water Resources Allocation device |
| CN109578263A (en) * | 2019-01-08 | 2019-04-05 | 河北诚悦扬节能科技有限公司 | A kind of differential pressure multisystem water management system |
-
2016
- 2016-01-15 CN CN201620037239.0U patent/CN205475474U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507378A (en) * | 2016-01-15 | 2016-04-20 | 昆明理工大学 | Frequency-conversion-type automatic constant-pressure water supplying system and method |
| CN108049453A (en) * | 2017-10-31 | 2018-05-18 | 江苏省水利勘测设计研究院有限公司 | A kind of south water to north water transfer system Water Resources Allocation device |
| CN109578263A (en) * | 2019-01-08 | 2019-04-05 | 河北诚悦扬节能科技有限公司 | A kind of differential pressure multisystem water management system |
| CN109578263B (en) * | 2019-01-08 | 2024-04-05 | 河北诚悦扬节能科技有限公司 | Micro-differential pressure multi-system water supply control system |
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