CN106522312A - Multi-pump parallel-connection variable frequency and constant pressure control system - Google Patents
Multi-pump parallel-connection variable frequency and constant pressure control system Download PDFInfo
- Publication number
- CN106522312A CN106522312A CN201611127738.XA CN201611127738A CN106522312A CN 106522312 A CN106522312 A CN 106522312A CN 201611127738 A CN201611127738 A CN 201611127738A CN 106522312 A CN106522312 A CN 106522312A
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- Prior art keywords
- pressure
- water pump
- pipe network
- pid controller
- converter
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Classifications
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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, valves, in the pipe systems
Abstract
The invention discloses a multi-pump parallel-connection variable frequency and constant pressure control system. The system includes a PID controller, an inverter, a motor, water pumps, a pipe network and a pressure sensor; the PID controller is connected with an inverter, the motor, the pressure sensor and a plurality of water pumps respectively; in the system, The PID controller is used for comparing a detection value of the pressure sensor with a water pressure set value and then controlling the inverter based on the comparative result, and the inverter is used for controlling the motor and the water pumps to work through an output frequency; the pressure sensor is used for obtaining the pressure in the pipe network in real time, comparing the pressure in the pipe network with the set pressure of the PID controller, and controlling the number of work of the water pumps through the PID controller according to the comparative result, that is, the pressure in the pipe network is increased through the fluid force of the water pumps to reach a set pressure so as to avoid problems caused by very low pressure.
Description
Technical field
The present invention relates to water management system, and in particular to a kind of multiple ontology frequency conversion constant voltage control system.
Background technology
In general city, the hydraulic pressure of pipe network can only ensure the use water of below 4 layers of building, and each layer in remaining top " must be carried
Rising " hydraulic pressure could meet and required with water.Water tower, elevated tank or air pressure pot type supercharging equipment were adopted mostly in the past, but they were all
The water yield must be lifted to be higher by the pressure of actual used water height by water pump, its result increases the shaft power of water pump and energy is damaged
Consumption；Therefore, a kind of simple structure is developed, easily manufactured, with low cost, flexible operation, a kind of relatively low multiple ontology of energy consumption become
Frequency control system of invariable pressure has important application value.
The content of the invention
The invention aims to overcome the shortcomings of existing constant pressure water supply control system, as much as possible solve people and exist
The inconvenient problem run into during to high-floor feedwater, a kind of so as to provide simple structure, easily manufactured, with low cost, flexible operation, energy
A kind of relatively low multiple ontology frequency conversion constant voltage control system of consumption.
What the present invention was realized in：A kind of multiple ontology frequency conversion constant voltage control system, it is characterised in that including one
PID controller 1, converter 2, motor 3, water pump 4,5 pressure transducer 6 of pipe network and PLC 7；
PID controller 1 connects converter 2, PLC 7, motor 3, pressure transducer 6 and multiple water pumps 4 respectively；
Pressure transducer 6 is used to detect the hydraulic pressure in pipe network 5, and actual pressure is input to the detection limit simulation of PID controller 1
Input；
When the pressure of a pressure value, pipe network 5 is arranged in PID1 less than setting pressure, PID controller output increases, converter 2
Frequency increases, and 3 rotating speed of motor increases, and the pressure in pipe network 5 increases；
The detection pressure of pressure transducer 6 is compared by PID controller 1 with setting pressure, and is become according to comparative result control
Frequency device 2 works, and the rotating speed of the control motor 3 of converter 2 simultaneously drives water pump 4 to work, and pressure transducer 6 obtains pipe network 5 always
Pressure value, when and the pressure value in pipe network 5 compared with setup pressure value, and work water pump 4 is determined according to comparative result
Quantity.
When in water pump 4 operationally pipe network 5, pressure is still less than setting pressure, the control of PLC 7 increases a water
Pump work, when the operating pressure in pipe network 5 more than setting pressure when and PID controller 1 output it is minimum, by PLC controls
Device control stops a water pump 4 and works.
When described PID controller 1 increases a water pump 4 and works, the output of PID controllers 1 increases, converter 2 it is defeated
Go out frequency increase, when the work of water pump 4 is stopped, the output of PID controller 1 reduces, and 2 output frequency of converter also subtracts therewith
It is little.
Described PID controller 1 is connected with converter 2, motor 3, water pump 4, pressure transducer 6.
It is in parallel between described multiple water pumps 4.
The invention has the beneficial effects as follows the PID controller that this programme is arranged, converter, PLC and multiple water pumps,
And the pressure transducer arranged in pipe network, pressure transducer carried out according to the pressure that the pressure in pipe network and PID controller are arranged
Contrast, if actual pressure is increased less than PID controller output parameter during setting pressure, frequency converter frequency is raised, and works as pid parameter
When minimum, ductwork pressure increases a pump work still less than PLC control during setting pressure；Generally, this
It is bright with a kind of simple structure, easily manufactured, with low cost, flexible operation, the relatively low achievable high-floor feedwater constant pressure of energy consumption it is excellent
Point.
Description of the drawings
Fig. 1 is a kind of control principle drawing of multiple ontology frequency conversion constant voltage control system of the present invention.
Fig. 2 is a kind of the first electric drawings of multiple ontology frequency conversion constant voltage control system of the present invention.
Fig. 3 is a kind of the second electric drawings of multiple ontology frequency conversion constant voltage control system of the present invention.
Fig. 4 is a kind of the 3rd electric drawings of multiple ontology frequency conversion constant voltage control system of the present invention.
In figure：1st, PID controller 2, converter 3, motor 4, water pump 5, pipe network 6, the control of pressure transducer 7, PLC
Device processed.
Specific embodiment
The present invention is described further below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of multiple ontology frequency conversion constant voltage control system, it is characterised in that including
Individual PID controller 1, converter 2, motor 3, water pump 4,5 pressure transducer 6 of pipe network and PLC 7；
PID controller 1 connects converter 2, PLC 7, motor 3, pressure transducer 6 and multiple water pumps 4 respectively；
Pressure transducer 6 is used to detect the hydraulic pressure in pipe network 5, and actual pressure is input to the detection limit simulation of PID controller 1
Input；
When the pressure of a pressure value, pipe network 5 is arranged in PID1 less than setting pressure, PID controller output increases, converter 2
Frequency increases, and 3 rotating speed of motor increases, and the pressure in pipe network 5 increases；
The detection pressure of pressure transducer 6 is compared by PID controller 1 with setting pressure, and is become according to comparative result control
Frequency device 2 works, and the rotating speed of the control motor 3 of converter 2 simultaneously drives water pump 4 to work, and pressure transducer 6 obtains pipe network 5 always
Pressure value, when and the pressure value in pipe network 5 compared with setup pressure value, and work water pump 4 is determined according to comparative result
Quantity；When in water pump 4 operationally pipe network 5, pressure is still less than setting pressure, the control of PLC 7 increases a water pump
Work, when the operating pressure in pipe network 5 more than setting pressure when and PID controller 1 output it is minimum, by PLC
Control stops a water pump 4 and works；When described PID controller 1 increases the work of water pump 4, the output of PID controllers 1 increases
Plus, the output frequency of converter 2 increases, and when the work of water pump 4 is stopped, the output of PID controller 1 reduces, and converter 2 is defeated
Go out frequency also to reduce therewith；Described PID controller 1 is connected with converter 2, motor 3, water pump 4, pressure transducer 6；It is described
Multiple water pumps 4 between be in parallel.
The present invention when implementing, a kind of multiple ontology frequency conversion constant voltage control system, it is characterised in that including PID control
Device processed 1, converter 2, motor 3, water pump 4,5 pressure transducer 6 of pipe network and PLC 7；
PID controller 1 connects converter 2, PLC 7, motor 3, pressure transducer 6 and multiple water pumps 4 respectively；
Pressure transducer 6 is used to detect the hydraulic pressure in pipe network 5, and actual pressure is input to the detection limit simulation of PID controller 1
Input；
When the pressure of a pressure value, pipe network 5 is arranged in PID1 less than setting pressure, PID controller output increases, converter 2
Frequency increases, and 3 rotating speed of motor increases, and the pressure in pipe network 5 increases；
The detection pressure of pressure transducer 6 is compared by PID controller 1 with setting pressure, and is become according to comparative result control
Frequency device 2 works, and the rotating speed of the control motor 3 of converter 2 simultaneously drives water pump 4 to work, and pressure transducer 6 obtains pipe network 5 always
Pressure value, when and the pressure value in pipe network 5 compared with setup pressure value, and work water pump 4 is determined according to comparative result
Quantity；When in water pump 4 operationally pipe network 5, pressure is still less than setting pressure, the control of PLC 7 increases a water pump
Work, when the operating pressure in pipe network 5 more than setting pressure when and PID controller 1 output it is minimum, by PLC
Control stops a water pump 4 and works；When described PID controller 1 increases the work of water pump 4, the output of PID controllers 1 increases
Plus, the output frequency of converter 2 increases, and when the work of water pump 4 is stopped, the output of PID controller 1 reduces, and converter 2 is defeated
Go out frequency also to reduce therewith；Described PID controller 1 is connected with converter 2, motor 3, water pump 4, pressure transducer 6；It is described
Multiple water pumps 4 between be in parallel；After completing above-mentioned installation, you can the present invention is come into operation, control system of invariable pressure is in operation
When, when the actual pressure of pipe network 5 is less than setting pressure, the output of PID controller 1 increases, and 2 frequency of converter increases, motor 3
Rotating speed rises, and with the acceleration of water pump 4, the actual pressure of pipe network increases, when the output of PID controller 1 increases to maximum always,
The output frequency of converter 2 reaches highest frequency, if actual pressure still is below setting when 4 rotating speed of water pump reaches rated speed
During pressure, then the low alarm signal of 1 output pressure of PID controller, when PLC controllers 7 are connected to the low-pressure alarm signal, prolongs
When the regular hour, if actual pressure always less than setting pressure, illustrate that one water pump 4 is not enough, then PLC control
Second water pump puts into operation, till reaching satisfaction requirement always, when the actual pressure of pipe network 5 is more than setting pressure, if
PID controller 1 exports minimum, then the high alarm signal of 1 output pressure of PID controller, and PLC receives this input signal
When, time delay regular hour, PLC controls turn off a water pump, till closing the satisfaction requirement of pump number of units；Generally, this
It is bright with a kind of simple structure, easily manufactured, with low cost, flexible operation, the relatively low achievable high-floor feedwater constant pressure of energy consumption it is excellent
Point.
Claims (5)
1. a kind of multiple ontology frequency conversion constant voltage control system, it is characterised in that including a PID controller（1）, converter (2
), motor (3), water pump（4）, pipe network（5）Pressure transducer（6）And PLC（7）；
PID controller（1）Connect converter respectively（2）, PLC（7）, motor（3）, pressure transducer（6）With it is multiple
Water pump（4）；
Pressure transducer（6）For detecting pipe network（5）Interior hydraulic pressure, and actual pressure is input to PID controller（1）Detection
Amount analog input end；
PID（1）It is interior that pressure value, a pipe network are set（5）Pressure less than setting pressure when, PID controller output increase, frequency conversion
Device（2）Frequency increases, motor（3）Rotating speed increases, pipe network（5）Interior pressure increases；
PID controller（1）By pressure transducer（6）Detection pressure be compared with setting pressure, and according to comparative result control
Converter processed（2）Work, converter（2）Control motor（3）Rotating speed and drive water pump（4）Work, and pressure transducer（6）
Pipe network is obtained always（5）Pressure value, when and by pipe network（5）Interior pressure value is compared with setup pressure value, and according to comparing knot
Fruit determines work water pump（4）Quantity.
2. a kind of multiple ontology frequency conversion constant voltage control system according to claim 1, it is characterised in that：Work as water pump（4）
Pipe network during work（5）When interior pressure is still less than setting pressure, PLC（7）Control increases a pump working, works as pipe network
（5）Interior operating pressure is more than when setting pressure and PID controller（1）Output it is minimum, by PLC control stop
One water pump（4）Work.
3. a kind of multiple ontology frequency conversion constant voltage control system according to claim 1, it is characterised in that：Described PID controls
Device processed（1）Increase a water pump（4）During work, PID controllers（1）Output increase, converter（2）Output frequency increase,
When one water pump of stopping（4）During work, PID controller（1）Output reduce, converter (2) output frequency also reduces therewith.
4. a kind of multiple ontology frequency conversion constant voltage control system according to claim 1, it is characterised in that：Described PID controls
Device processed（1）With converter（2）, motor（3）, water pump（4）, pressure transducer（6）Series connection.
5. a kind of multiple ontology frequency conversion constant voltage control system according to claim 1, it is characterised in that：Described multiple water
Pump（4）Between be in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611127738.XA CN106522312A (en) | 2016-12-09 | 2016-12-09 | Multi-pump parallel-connection variable frequency and constant pressure control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611127738.XA CN106522312A (en) | 2016-12-09 | 2016-12-09 | Multi-pump parallel-connection variable frequency and constant pressure control system |
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| Publication Number | Publication Date |
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| CN106522312A true CN106522312A (en) | 2017-03-22 |
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|---|---|---|---|
| CN201611127738.XA Pending CN106522312A (en) | 2016-12-09 | 2016-12-09 | Multi-pump parallel-connection variable frequency and constant pressure control system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107272759A (en) * | 2017-07-05 | 2017-10-20 | 华南农业大学 | A kind of piping liquid pressure controller and its control method |
| CN107503957A (en) * | 2017-07-04 | 2017-12-22 | 江门市天澜清洗设备有限公司 | More pump level controlling systems and its control method applied to cleaning machine |
| CN108385780A (en) * | 2018-03-06 | 2018-08-10 | 广州市百福电气设备有限公司 | Water management system, water-supply control, device and variable frequency pump |
| CN108894966A (en) * | 2018-08-09 | 2018-11-27 | 武汉长江科创科技发展有限公司 | A kind of chemical grouting pump control system of invariable pressure and method |
| TWI674360B (en) * | 2018-04-25 | 2019-10-11 | 欣展機械有限公司 | Multiple Variable Frequency Pump Controller And Control Method |
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| EP1024298A2 (en) * | 1999-01-29 | 2000-08-02 | A. Römheld GmbH & Co KG | Hydraulic unit with variable system pressure |
| CA2292406A1 (en) * | 1999-12-14 | 2001-06-14 | Peter Beaini | 1 pipe reverse flow |
| CN201040854Y (en) * | 2007-04-25 | 2008-03-26 | 熊国恒 | Full-automatic frequency conversion constant-voltage water-supping device |
| CN102116043A (en) * | 2009-12-31 | 2011-07-06 | 上海东方泵业(集团)有限公司 | Frequency conversion constant-pressure water supply system and control method thereof |
| CN105971054A (en) * | 2016-05-24 | 2016-09-28 | 安徽恒远自动化仪表有限公司 | Constant-pressure variable circular water supply control system |
-
2016
- 2016-12-09 CN CN201611127738.XA patent/CN106522312A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1024298A2 (en) * | 1999-01-29 | 2000-08-02 | A. Römheld GmbH & Co KG | Hydraulic unit with variable system pressure |
| CA2292406A1 (en) * | 1999-12-14 | 2001-06-14 | Peter Beaini | 1 pipe reverse flow |
| CN201040854Y (en) * | 2007-04-25 | 2008-03-26 | 熊国恒 | Full-automatic frequency conversion constant-voltage water-supping device |
| CN102116043A (en) * | 2009-12-31 | 2011-07-06 | 上海东方泵业(集团)有限公司 | Frequency conversion constant-pressure water supply system and control method thereof |
| CN105971054A (en) * | 2016-05-24 | 2016-09-28 | 安徽恒远自动化仪表有限公司 | Constant-pressure variable circular water supply control system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503957A (en) * | 2017-07-04 | 2017-12-22 | 江门市天澜清洗设备有限公司 | More pump level controlling systems and its control method applied to cleaning machine |
| CN107503957B (en) * | 2017-07-04 | 2019-04-09 | 江门市天澜清洗设备有限公司 | More pump level controlling systems and its control method applied to cleaning machine |
| CN107272759A (en) * | 2017-07-05 | 2017-10-20 | 华南农业大学 | A kind of piping liquid pressure controller and its control method |
| CN107272759B (en) * | 2017-07-05 | 2020-01-17 | 华南农业大学 | Pipeline liquid pressure controller and control method thereof |
| CN108385780A (en) * | 2018-03-06 | 2018-08-10 | 广州市百福电气设备有限公司 | Water management system, water-supply control, device and variable frequency pump |
| TWI674360B (en) * | 2018-04-25 | 2019-10-11 | 欣展機械有限公司 | Multiple Variable Frequency Pump Controller And Control Method |
| CN108894966A (en) * | 2018-08-09 | 2018-11-27 | 武汉长江科创科技发展有限公司 | A kind of chemical grouting pump control system of invariable pressure and method |
| CN108894966B (en) * | 2018-08-09 | 2024-01-02 | 武汉长江科创科技发展有限公司 | Constant pressure control system and method for chemical grouting pump |
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Application publication date: 20170322 |
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