CN105971054B - A kind of constant-pressure variable circulates shape water management system - Google Patents
A kind of constant-pressure variable circulates shape water management system Download PDFInfo
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- CN105971054B CN105971054B CN201610369167.4A CN201610369167A CN105971054B CN 105971054 B CN105971054 B CN 105971054B CN 201610369167 A CN201610369167 A CN 201610369167A CN 105971054 B CN105971054 B CN 105971054B
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- water
- control unit
- pump
- frequency conversion
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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
- E03B1/00—Methods or layout of installations for water supply
- E03B1/02—Methods or layout of installations for water supply for public or like main supply for industrial use
-
- 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
- E03B7/071—Arrangement of safety devices in domestic pipe systems, e.g. devices for automatic shut-off
-
- 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
- E03B7/075—Arrangement of devices for control of pressure or flow rate
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a kind of constant-pressure variable to circulate shape water management system, including multiple water pumps, frequency conversion control unit, industrial frequency control unit, changeable water supply controller and device for detecting water pressure.Frequency conversion control unit is controlled real water transfer pump in real time by device for detecting water pressure detected value and the comparative result of hydraulic pressure threshold value in the present invention；Changeable water supply controller, respectively with preset upper limit power and the comparative result of pre-determined lower limit power, controls frequency conversion control unit and industrial frequency control cell operation by current real water transfer pump power output.In this way, realizing the full-automation for control of supplying water, and by controlling the water pump quantity under VFC state, the logic complexity of whole control system is reduced, be advantageous to fault detect, ensure the stabilization of system work.
Description
Technical field
The present invention relates to constant pressure water supply technical field, more particularly to a kind of constant-pressure variable circulation shape water management system.
Background technology
Constant pressure water supply drags more control modes using a kind of low cost one, realizes closed loop adjustment control constant pressure water supply, becomes
Frequency constant pressure water supply can be extensively using industrial process waters Isobarically Control.Feed pump is in power frequency supply in traditional boiler feed system
Driving under continuously run, adjust feed pressure by adjusting outlet valve opening, a large amount of energy expenditures waste in outlet valve.
By using frequency control Isobarically Control, in setting pressure water consumption can be followed to supply water, avoid the damage of traditional water supply mode
Consumption, reduces ton water consumption, and constant pressure water supply technology also has stable water pressure, maintenance operation cost than traditional pressurization water system
Low clear superiority.It can be seen that constant pressure water supply technology development space in variable water supply is wide.
The content of the invention
Based on technical problem existing for background technology, the present invention, which proposes a kind of constant-pressure variable circulation shape and supplies water to control, is
System.
A kind of constant-pressure variable circulation shape water management system proposed by the present invention, including multiple water pumps, frequency conversion control unit,
Industrial frequency control unit, changeable water supply controller and device for detecting water pressure；
Device for detecting water pressure is used to detect water inner pipe water pressure in real time, and water pump is used to provide power to water in-pipe flow；For
Water controller connects frequency conversion control unit and industrial frequency control unit, frequency conversion control unit and industrial frequency control unit respectively connect often
One water pump；
Each water pump is respectively provided with VFC state and industrial frequency control state, under VFC state, water pump output work
Rate is adjusted in real time by frequency conversion control unit；Under industrial frequency control state, water pump is controlled by industrial frequency control unit and water pump power output
For definite value；
Frequency conversion control unit selects the water pump that do not work in multiple water pumps in parallel as real water transfer pump, and according to water
Detection means detected value is pressed to carry out VFC to real water transfer pump with hydraulic pressure threshold value comparative result；Reality under VFC state
The power output of water transfer pump is more than or controls real water transfer pump to be switched to industrial frequency control shape equal to preset upper limit power, changeable water supply controller
State, and changeable water supply controller control frequency conversion control unit reselects the water pump that do not work and carries out frequency conversion control as real water transfer pump
System；When power output of the real water transfer pump under frequency conversion control unit control is less than or equal to pre-determined lower limit power, changeable water supply controller
The water pump closed by industrial frequency control unit under an industrial frequency control state.
Preferably, preset upper limit power is equal to or more than the power output of the water pump under industrial frequency control state；Pre-determined lower limit
Power is equal to zero.
Preferably, twice of preset upper limit power less than the power output of the water pump under industrial frequency control state.
Preferably, 1.5 times of preset upper limit power equal to the power output of the water pump under industrial frequency control state.
Preferably, device for detecting water pressure is connected with frequency conversion control unit, and hydraulic pressure threshold value is arranged in frequency conversion control unit；Become
Frequency control unit controls real water transfer pump work according to device for detecting water pressure detected value and hydraulic pressure threshold value comparative result；Preset upper limit work(
In changeable water supply controller, changeable water supply controller obtains current real water transfer pump by frequency conversion control unit for rate and pre-determined lower limit power setting
Power output, and by current real water transfer pump power output respectively compared with preset upper limit power and pre-determined lower limit power, so
Frequency conversion control unit and industrial frequency control cell operation are controlled according to comparative result afterwards.
Preferably, device for detecting water pressure is connected with changeable water supply controller, hydraulic pressure threshold value, preset upper limit power and pre-determined lower limit work(
Rate is arranged in changeable water supply controller；Device for detecting water pressure detected value and hydraulic pressure threshold value are compared by changeable water supply controller, frequency conversion
Control unit controls real water transfer pump work according to device for detecting water pressure detected value and hydraulic pressure threshold value comparative result；Changeable water supply controller leads to
Cross frequency conversion control unit and obtain current real water transfer pump power output, and will currently real water transfer pump power output respectively with preset upper limit
Power and pre-determined lower limit power are compared, and then control frequency conversion control unit and industrial frequency control unit work according to comparative result
Make.
Preferably, water pump uses centrifugal pump.
Preferably, changeable water supply controller uses PID controller.
A kind of constant-pressure variable circulation shape water management system provided by the invention, passes through industrial frequency control unit and VFC
Unit matching, frequency conversion control unit only need to carry out VFC to a real water transfer pump all the time.In this way, by controlling frequency conversion control
Water pump quantity under state processed, reduces the waste of system power dissipation, there is provided power utilization, realizes the stabilization of hydraulic pressure regulation
Property.
In the present invention, when the power output of the real water transfer pump under VFC state is more than or equal to preset upper limit power,
By increasing the water pump under an industrial frequency control state, the operating pressure of frequency conversion control unit is reduced, and by directly ought
Preceding real water transfer pump is switched to industrial frequency control state, avoids a not actuated water pump being switched to the time-consuming of industrial frequency control state
Problem.And in the present invention, be used as new real water transfer pump by the selection water pump that do not work and carry out VFC, avoid increase newly
Industrial frequency control state water pump after the process lowered to the power output of previous real water transfer pump.It can be seen that in the present invention
The switching mode of offer, the time of water pump power output regulation is improved, improves operating efficiency.
Frequency conversion control unit is by device for detecting water pressure detected value and the comparative result of hydraulic pressure threshold value in the present invention, to real tune
Water pump is controlled in real time；Changeable water supply controller is set with preset upper limit power and in advance respectively by current real water transfer pump power output
The comparative result of power is limited, controls frequency conversion control unit and industrial frequency control cell operation.In this way, realize control of supplying water it is complete from
Dynamicization, and by controlling the water pump quantity under VFC state, the logic complexity of whole control system is reduced, favorably
In fault detect, ensure the stabilization that system works.
Brief description of the drawings
Fig. 1 circulates shape water management system structural representation for a kind of constant-pressure variable proposed by the present invention.
Embodiment
Reference picture 1, a kind of constant-pressure variable circulation shape water management system proposed by the present invention, including multiple water pumps 1, frequency conversion
Control unit 2, industrial frequency control unit 3, changeable water supply controller 4 and device for detecting water pressure.
Device for detecting water pressure is used to detect water inner pipe water pressure in real time, and water pump 1 is used to provide power to water in-pipe flow.This
In embodiment, water pump 1 uses centrifugal pump, and changeable water supply controller 4 is using PID controller (Proportion Integration
Differentiation, proportional-integral derivative controller).Changeable water supply controller 4 connects frequency conversion control unit 2 and industrial frequency control
Unit 3, frequency conversion control unit 2 and industrial frequency control unit 3 respectively connect each water pump 1.
Each water pump 1 is respectively provided with VFC state and industrial frequency control state, and under VFC state, water pump 1 exports
Power is adjusted in real time by frequency conversion control unit 2 according to device for detecting water pressure detected value and the comparative result of default hydraulic pressure threshold value
Section；Under industrial frequency control state, water pump 1 is controlled by industrial frequency control unit 3 and the power output of water pump 1 is definite value.
In present embodiment, device for detecting water pressure is connected with frequency conversion control unit 2, and hydraulic pressure threshold value is arranged on VFC list
In member 2, frequency conversion control unit 2 obtains device for detecting water pressure detected value and by device for detecting water pressure detected value and hydraulic pressure threshold value in real time
Compare, obtain comparative result.Or device for detecting water pressure is connected with changeable water supply controller 4, hydraulic pressure threshold value is arranged on changeable water supply controller
In 4；Device for detecting water pressure detected value and hydraulic pressure threshold value are compared by changeable water supply controller 4, and frequency conversion control unit 2 directly obtains water
Press detection means detected value and hydraulic pressure threshold value comparative result.
Preset upper limit power and pre-determined lower limit power are provided with changeable water supply controller 4.In present embodiment, preset upper limit work(
Rate is equal to or more than the power output of the water pump 1 under industrial frequency control state and less than the output of the water pump 1 under industrial frequency control state
Twice of power, specifically, preset upper limit power can be equal to 1.5 times of the power output of the water pump 1 under industrial frequency control state.In advance
If lower power is equal to zero.
Frequency conversion control unit 2 selects one in multiple water pumps 1 of the parallel connection water pump 1 that do not work to be used as real water transfer pump, and root
VFC is carried out to real water transfer pump according to device for detecting water pressure detected value and hydraulic pressure threshold value comparative result.
When device for detecting water pressure detected value is less than hydraulic pressure threshold value, frequency conversion control unit controls real water transfer pump increase output work
Rate, so as to increase hydraulic pressure.When the power output of the real water transfer pump under VFC state is more than or equal to preset upper limit power, supplies
Water controller 4 controls real water transfer pump to be switched to industrial frequency control state, and changeable water supply controller 4 controls frequency conversion control unit to reselect
One water pump 1 that do not work carries out VFC as real water transfer pump.In this way, by increasing the water pump under an industrial frequency control state
1, the operating pressure of frequency conversion control unit 2 is reduced, and by the way that current real water transfer pump directly is switched into industrial frequency control state, keep away
The time-consuming problem of industrial frequency control state is exempted from a not actuated water pump 1 being switched to.And when one industrial frequency control state of increase
Under water pump 1 after, for balancing water pressure, frequency conversion control unit 2 control real water transfer pump power output relative to increase power frequency
Rapid drawdown before water pump 1 under state of a control.In present embodiment, new real water transfer pump progress be used as by the selection water pump 1 that do not work
VFC, avoid the process lowered to the power output of previous real water transfer pump.It can be seen that what present embodiment provided
Switching mode, the time of the power output of water pump 1 regulation is improved, improves operating efficiency.
When device for detecting water pressure detected value is more than hydraulic pressure threshold value, frequency conversion control unit controls real water transfer pump to reduce output work
Rate, so as to reduce hydraulic pressure.When power output of the real water transfer pump under the control of frequency conversion control unit 2 is less than or equal to pre-determined lower limit work(
Rate 0, the water pump 1 that changeable water supply controller 4 is closed under an industrial frequency control state by industrial frequency control unit 3, and reacquire hydraulic pressure
Detection means detected value and hydraulic pressure threshold value comparative result, VFC is then carried out to real water transfer pump according to comparative result.Hydraulic pressure
Detection means detected value is more than under the adjustment state of hydraulic pressure threshold value, and the real water transfer pump that frequency conversion control unit 2 controls is constant, and when real
When power output of the water transfer pump under the control of frequency conversion control unit 2 is less than or equal to pre-determined lower limit power 0, a work is directly closed
Water pump 1 under frequency state of a control is to alleviate the control pressure of frequency conversion control unit 2.In this way, pass through VFC and industrial frequency control
Cooperation, hydraulic pressure can be adjusted in real time, it is objective reliable.
In present embodiment, by the cooperation of industrial frequency control unit 3, frequency conversion control unit 2 only needs to a reality all the time
Water transfer pump carries out VFC.In this way, by controlling the water pump quantity under VFC state, the wave of system power dissipation is reduced
Take, there is provided power utilization, realize the stability of hydraulic pressure regulation.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (7)
1. a kind of constant-pressure variable circulates shape water management system, it is characterised in that including multiple water pumps (1), frequency conversion control unit
(2), industrial frequency control unit (3), changeable water supply controller (4) and device for detecting water pressure；
Device for detecting water pressure is used to detect water inner pipe water pressure in real time, and water pump (1) is used to provide power to water in-pipe flow；Supply water
Controller (4) connection frequency conversion control unit (2) and industrial frequency control unit (3), frequency conversion control unit (2) and industrial frequency control unit
(3) each water pump (1) is respectively connected；
Each water pump (1) is respectively provided with VFC state and industrial frequency control state, under VFC state, water pump (1) output
Power is adjusted in real time by frequency conversion control unit (2)；Under industrial frequency control state, water pump (1) is controlled by industrial frequency control unit (3) and water
Pump (1) power output is definite value；
The water pump (1) that do not work in frequency conversion control unit (2) selection multiple water pumps (1) in parallel is used as real water transfer pump, and
VFC is carried out to real water transfer pump according to device for detecting water pressure detected value and hydraulic pressure threshold value comparative result；When VFC state
Under the power output of real water transfer pump be more than or equal to preset upper limit power, changeable water supply controller (4) controls real water transfer pump to be switched to
Industrial frequency control state, and changeable water supply controller (4) control frequency conversion control unit reselects the water pump (1) that do not work and adjusted as real
Water pump carries out VFC；Set in advance when power output of the real water transfer pump under frequency conversion control unit (2) control is less than or equal to
Limit power, the water pump (1) that changeable water supply controller (4) is closed under an industrial frequency control state by industrial frequency control unit (3).
2. constant-pressure variable as claimed in claim 1 circulates shape water management system, it is characterised in that preset upper limit power is equal to
Or the power output more than the water pump (1) under industrial frequency control state；Pre-determined lower limit power is equal to zero.
3. constant-pressure variable as claimed in claim 2 circulates shape water management system, it is characterised in that preset upper limit power is equal to
1.5 times of the power output of water pump (1) under industrial frequency control state.
4. constant-pressure variable as claimed in claim 1 circulates shape water management system, it is characterised in that device for detecting water pressure is with becoming
Frequency control unit (2) is connected, and hydraulic pressure threshold value is arranged in frequency conversion control unit (2)；Frequency conversion control unit (2) detects according to hydraulic pressure
Device detected value controls real water transfer pump work with hydraulic pressure threshold value comparative result；Preset upper limit power and pre-determined lower limit power setting exist
In changeable water supply controller (4), changeable water supply controller (4) obtains current real water transfer pump power output by frequency conversion control unit (2), and will
Current real water transfer pump power output is respectively compared with preset upper limit power and pre-determined lower limit power, then according to comparative result
Control frequency conversion control unit (2) and industrial frequency control unit (3) work.
5. constant-pressure variable as claimed in claim 1 circulates shape water management system, it is characterised in that device for detecting water pressure is with supplying
Water controller (4) is connected, and hydraulic pressure threshold value, preset upper limit power and pre-determined lower limit power are arranged in changeable water supply controller (4)；For
Device for detecting water pressure detected value and hydraulic pressure threshold value are compared by water controller (4), and frequency conversion control unit (2) detects according to hydraulic pressure
Device detected value controls real water transfer pump work with hydraulic pressure threshold value comparative result；Changeable water supply controller (4) passes through frequency conversion control unit (2)
Obtain current real water transfer pump power output, and will currently real water transfer pump power output respectively with preset upper limit power and pre-determined lower limit
Power is compared, and then controls frequency conversion control unit (2) and industrial frequency control unit (3) to work according to comparative result.
6. constant-pressure variable as claimed in claim 1 circulates shape water management system, it is characterised in that water pump (1) is using centrifugation
Pump.
7. constant-pressure variable as claimed in claim 1 circulates shape water management system, it is characterised in that changeable water supply controller (4) is adopted
Use PID controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610369167.4A CN105971054B (en) | 2016-05-24 | 2016-05-24 | A kind of constant-pressure variable circulates shape water management system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610369167.4A CN105971054B (en) | 2016-05-24 | 2016-05-24 | A kind of constant-pressure variable circulates shape water management system |
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| CN105971054A CN105971054A (en) | 2016-09-28 |
| CN105971054B true CN105971054B (en) | 2018-04-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106522312A (en) * | 2016-12-09 | 2017-03-22 | 屈兆辉 | Multi-pump parallel-connection variable frequency and constant pressure control system |
| CN109782633B (en) * | 2017-11-10 | 2021-11-12 | 宁波方太厨具有限公司 | Automatic water adding control method of water tank type cleaning machine |
| CN113325794A (en) * | 2021-05-27 | 2021-08-31 | 三峡电力职业学院 | Remote variable frequency control system based on PLC |
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|---|---|---|---|---|
| JPH10195939A (en) * | 1997-01-16 | 1998-07-28 | Teraru Kyokuto:Kk | Water supply equipment to prevent rotting of water |
| CN201473997U (en) * | 2009-07-21 | 2010-05-19 | 秦征 | Automatic constant-pressure water supply system in power frequency control manner |
| CN102359152A (en) * | 2011-08-05 | 2012-02-22 | 重庆成峰二次供水设备有限责任公司 | Two-control multi-constant-pressure water supply equipment control system and control method thereof |
| CN203768997U (en) * | 2014-03-12 | 2014-08-13 | 陕西雷光环保科技有限公司 | Variable-flow and stable-pressure water supply device |
-
2016
- 2016-05-24 CN CN201610369167.4A patent/CN105971054B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10195939A (en) * | 1997-01-16 | 1998-07-28 | Teraru Kyokuto:Kk | Water supply equipment to prevent rotting of water |
| CN201473997U (en) * | 2009-07-21 | 2010-05-19 | 秦征 | Automatic constant-pressure water supply system in power frequency control manner |
| CN102359152A (en) * | 2011-08-05 | 2012-02-22 | 重庆成峰二次供水设备有限责任公司 | Two-control multi-constant-pressure water supply equipment control system and control method thereof |
| CN203768997U (en) * | 2014-03-12 | 2014-08-13 | 陕西雷光环保科技有限公司 | Variable-flow and stable-pressure water supply device |
Non-Patent Citations (1)
| Title |
|---|
| 变频调速恒压供水系统的分析与研究;李静;《科技信息》;20120125(第3期);第196-197页 * |
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