CN105971054A - Constant-pressure variable circular water supply control system - Google Patents
Constant-pressure variable circular water supply control system Download PDFInfo
- Publication number
- CN105971054A CN105971054A CN201610369167.4A CN201610369167A CN105971054A CN 105971054 A CN105971054 A CN 105971054A CN 201610369167 A CN201610369167 A CN 201610369167A CN 105971054 A CN105971054 A CN 105971054A
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- China
- Prior art keywords
- water
- control unit
- pump
- frequency conversion
- real
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
Abstract
The invention discloses a constant-pressure variable circular water supply control system. The constant-pressure variable circular water supply control system comprises a plurality of water pumps, a frequency converting control unit, a power frequency control unit, a water supply controller and a water pressure detection device. The frequency converting control unit controls the real-time-adjusted water pump in real time according to results of comparison of detection values of the water pressure detection device with water pressure threshold values, and the water supply controller controls work of the frequency converting control unit and the power frequency control unit according to results of comparison of the output power of the current real-time-adjusted water pump with preset upper limit power and preset lower limit power. In this way, full automation of water supply control is achieved, the logic complexity degree of the whole control system is lowered by controlling the number of the water pumps in a frequency converting controlled state, fault detection is carried out easily, and the stability of work of the system is guaranteed.
Description
Technical field
The present invention relates to constant pressure water supply technical field, particularly relate to a kind of constant-pressure variable circulation shape for water management system
System.
Background technology
Constant pressure water supply uses a kind of low cost one to drag many control modes, it is achieved closed loop regulation controls constant voltage and supplies
Water, constant pressure water supply can extensive applicable industry industrial water Isobarically Control.In traditional boiler feed system
Feed pump continuously runs under the driving of power frequency supply, regulates feed pressure by regulation outlet valve opening,
A large amount of energy expenditures are wasted at outlet valve.By using frequency control Isobarically Control, can be in setting pressure
Follow water consumption to supply water, it is to avoid the loss of traditional water supply mode, reduce ton water consumption, constant pressure water supply
Technology also has the clear superiority such as stable water pressure, maintenance operation low cost than traditional pressurization water system.It is visible,
Constant pressure water supply technology is wide for development space waterborne at variable.
Summary of the invention
The technical problem existed based on background technology, the present invention proposes a kind of constant-pressure variable circulation shape for water control
System processed.
A kind of constant-pressure variable circulation shape water management system that the present invention proposes, including multiple water pumps, frequency conversion control
Unit processed, industrial frequency control unit, changeable water supply controller and device for detecting water pressure；
Device for detecting water pressure is for detection water inner pipe water pressure in real time, and water pump is used to provide dynamic to water in-pipe flow
Power；Changeable water supply controller connects frequency conversion control unit and industrial frequency control unit, frequency conversion control unit and industrial frequency control
Unit connects each water pump respectively；
Each water pump is respectively provided with VFC state and industrial frequency control state, under VFC state, water pump
Output is regulated in real time by frequency conversion control unit；Under industrial frequency control state, water pump is by industrial frequency control unit control
System and water pump output are definite value；
Frequency conversion control unit select the water pump that do not works of in multiple water pumps in parallel as real water transfer pump, and
With hydraulic pressure threshold value comparative result, real water transfer pump is carried out VFC according to device for detecting water pressure detected value；Work as change
Frequently the output of the real water transfer pump under controlled state is more than or equal to preset upper limit power, changeable water supply controller control
The real water transfer pump of system is switched to industrial frequency control state, and changeable water supply controller controls frequency conversion control unit and reselects one
The individual water pump that do not works carries out VFC as real water transfer pump；When real water transfer pump is under frequency conversion control unit control
Output less than or equal to pre-determined lower limit power, changeable water supply controller closes one by industrial frequency control unit
Water pump under industrial frequency control state.
Preferably, preset upper limit power is equal to or more than the output of the water pump under industrial frequency control state；In advance
If lower power is equal to zero.
Preferably, preset upper limit power is less than the multiple of the output of the water pump under industrial frequency control state.
Preferably, 1.5 times of the output of the water pump under preset upper limit power is equal to industrial frequency control state.
Preferably, device for detecting water pressure is connected with frequency conversion control unit, and hydraulic pressure threshold value is arranged on VFC list
In unit；Frequency conversion control unit is according to device for detecting water pressure detected value and the relatively output control reality water transfer of hydraulic pressure threshold ratio
Pump work；Preset upper limit power and pre-determined lower limit power setting are in changeable water supply controller, and changeable water supply controller passes through
Frequency conversion control unit obtains 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 compare, and then control frequency conversion control unit according to comparative result
With industrial frequency control cell operation.
Preferably, device for detecting water pressure is connected with changeable water supply controller, hydraulic pressure threshold value, preset upper limit power and pre-
If lower power is arranged in changeable water supply controller；Changeable water supply controller is by device for detecting water pressure detected value and hydraulic pressure
Threshold value compares, and frequency conversion control unit is according to device for detecting water pressure detected value and hydraulic pressure threshold value comparative result control
The real water transfer pump work of system；Changeable water supply controller obtains current real water transfer pump power output by frequency conversion control unit,
And current real water transfer pump power output is compared, so with preset upper limit power and pre-determined lower limit power respectively
Frequency conversion control unit and industrial frequency control cell operation is controlled afterwards according to comparative result.
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 that the present invention provides, by industrial frequency control unit and change
Frequently control unit coordinates, and frequency conversion control unit has only to a real water transfer pump is carried out VFC all the time.As
This, by controlling the water pump quantity under VFC state, reduce the waste of system power dissipation, it is provided that merit
Rate utilization rate, it is achieved that the stability of hydraulic pressure regulation.
In the present invention, when the 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, reduces the operating pressure of frequency conversion control unit,
And by directly current real water transfer pump being switched to industrial frequency control state, it is to avoid by a not actuated water pump
It is switched to the time-consuming problem of industrial frequency control state.And, in the present invention, do not work water pump as newly by selection
Real water transfer pump carry out VFC, it is to avoid to previous reality after the water pump of the industrial frequency control state that increase is new
The output of water transfer pump carries out the process lowered.Switching mode that is visible, that provide in the present invention, improves
The time of water pump output regulation, improve work efficiency.
In the present invention, frequency conversion control unit passes through device for detecting water pressure detected value and the comparative result of hydraulic pressure threshold value,
Real water transfer pump is controlled in real time；Changeable water supply controller passes through current real water transfer pump power output respectively with default
Upper Bound Power and the comparative result of pre-determined lower limit power, control frequency conversion control unit and industrial frequency control cell operation.
So, it is achieved that for the full-automation of water management, and by controlling the water pump quantity under VFC state,
Reduce the logic complexity of whole control system, beneficially fault detect, it is ensured that stablizing of system work.
Accompanying drawing explanation
Fig. 1 is a kind of constant-pressure variable circulation shape water management system structural representation that the present invention proposes.
Detailed description of the invention
With reference to Fig. 1, a kind of constant-pressure variable circulation shape water management system that the present invention proposes, 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 for detection water inner pipe water pressure in real time, and water pump 1 is used to provide power to water in-pipe flow.
In present embodiment, water pump 1 uses centrifugal pump, changeable water supply controller 4 to use 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 connect respectively
Connect each water pump 1.
Each water pump 1 is respectively provided with VFC state and industrial frequency control state, under VFC state, water
Pump 1 output by frequency conversion control unit 2 according to device for detecting water pressure detected value and the hydraulic pressure threshold value preset
Comparative result regulates in real time；Under industrial frequency control state, water pump 1 is controlled and water by industrial frequency control unit 3
Pump 1 output 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 change
Frequently, in control unit 2, frequency conversion control unit 2 obtains device for detecting water pressure detected value in real time and is detected by hydraulic pressure
Device detected value is with hydraulic pressure threshold ratio relatively, it is thus achieved that comparative result.Or, device for detecting water pressure and confession water management
Device 4 connects, and hydraulic pressure threshold value is arranged in changeable water supply controller 4；Device for detecting water pressure is examined by changeable water supply controller 4
Measured value and hydraulic pressure threshold value compare, and frequency conversion control unit 2 directly obtains device for detecting water pressure detected value and water
Pressure threshold value comparative result.
Preset upper limit power and pre-determined lower limit power it is provided with in changeable water supply controller 4.In present embodiment, in advance
If Upper Bound Power is equal to or more than the output of the water pump 1 under industrial frequency control state and less than industrial frequency control shape
The multiple of the output of the water pump 1 under state, specifically, preset upper limit power can be equal to industrial frequency control state
Under 1.5 times of output of water pump 1.Pre-determined lower limit power is equal to zero.
Frequency conversion control unit 2 selects the water pump 1 that do not works in multiple water pumps 1 of parallel connection as real water transfer
Pump, and with hydraulic pressure threshold value comparative result, real water transfer pump is carried out VFC according to device for detecting water pressure detected value.
When device for detecting water pressure detected value is less than hydraulic pressure threshold value, frequency conversion control unit controls real water transfer pump and increases defeated
Go out power, thus increase hydraulic pressure.When the output of the real water transfer pump under VFC state is more than or equal to
Preset upper limit power, changeable water supply controller 4 controls real water transfer pump and is switched to industrial frequency control state, and for water management
Device 4 controls frequency conversion control unit and reselects the water pump 1 that do not works and carry out VFC as real water transfer pump.
So, by increasing the water pump 1 under an industrial frequency control state, the work pressure of frequency conversion control unit 2 is reduced
Power, and by directly current real water transfer pump being switched to industrial frequency control state, it is to avoid not actuated by one
Water pump 1 is switched to the time-consuming problem of industrial frequency control state.And, when the water increased under an industrial frequency control state
After pump 1, for balancing water pressure, the output of the real water transfer pump that frequency conversion control unit 2 controls is relative to increasing
Add rapid drawdown before the water pump 1 under power frequency controlled state.In present embodiment, by selecting the water pump 1 that do not works to make
VFC is carried out, it is to avoid the output of previous real water transfer pump is lowered for new real water transfer pump
Process.Visible, present embodiment provide switching mode, improve water pump 1 output regulation time
Between, improve work 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 and reduces defeated
Go out power, thus reduce hydraulic pressure.When real water transfer pump output under frequency conversion control unit 2 controls is less than
Or equal to pre-determined lower limit power 0, changeable water supply controller 4 closes an industrial frequency control shape by industrial frequency control unit 3
Water pump 1 under state, and reacquire device for detecting water pressure detected value and hydraulic pressure threshold value comparative result, then basis
Comparative result carries out VFC to real water transfer pump.Device for detecting water pressure detected value is more than the regulation of hydraulic pressure threshold value
Under state, the real water transfer pump that frequency conversion control unit 2 controls is constant, and when real water transfer pump is in frequency conversion control unit 2
When output under Kong Zhiing is less than or equal to pre-determined lower limit power 0, directly close an industrial frequency control state
Under water pump 1 with alleviate frequency conversion control unit 2 control pressure.So, by VFC and power frequency control
System cooperation, hydraulic pressure can be regulated in real time, objective reliably.
In present embodiment, by the cooperation of industrial frequency control unit 3, frequency conversion control unit 2 has only to all the time
One real water transfer pump is carried out VFC.So, by controlling the water pump quantity under VFC state,
Reduce the waste of system power dissipation, it is provided that power utilization, it is achieved that the stability of hydraulic pressure regulation.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention not office
Being limited to this, any those familiar with the art is in the technical scope that the invention discloses, according to this
The technical scheme of invention and inventive concept thereof in addition equivalent or change, all should contain the protection in the present invention
Within the scope of.
Claims (8)
1. constant-pressure variable circulation shape water management system, it is characterised in that include multiple water pump (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 for detection water inner pipe water pressure in real time, and water pump (1) is used to carry to water in-pipe flow
For power；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) connect each water pump (1) respectively；
Each water pump (1) is respectively provided with VFC state and industrial frequency control state, under VFC state,
Water pump (1) output is regulated in real time by frequency conversion control unit (2)；Under industrial frequency control state, water pump (1)
Controlled by industrial frequency control unit (3) and water pump (1) output is definite value；
Frequency conversion control unit (2) selects a water pump that do not works (1) in multiple water pumps (1) in parallel to make
For real water transfer pump, and reality water transfer pump is carried out with hydraulic pressure threshold value comparative result according to device for detecting water pressure detected value
VFC；When the output of the real water transfer pump under VFC state is more than or equal to preset upper limit power,
Changeable water supply controller (4) controls real water transfer pump and is switched to industrial frequency control state, and changeable water supply controller (4) controls
Frequency conversion control unit reselects a water pump that do not works (1) and carries out VFC as real water transfer pump；Work as reality
Water transfer pump output under frequency conversion control unit (2) controls, less than or equal to pre-determined lower limit power, supplies water
Controller (4) cuts out the water pump (1) under an industrial frequency control state by industrial frequency control unit (3).
2. constant-pressure variable circulation shape water management system as claimed in claim 1, it is characterised in that preset
Upper Bound Power is equal to or more than the output of the water pump (1) under industrial frequency control state；Pre-determined lower limit power etc.
In zero.
3. constant-pressure variable circulation shape water management system as claimed in claim 2, it is characterised in that preset
Upper Bound Power is less than the multiple of the output of the water pump (1) under industrial frequency control state.
4. constant-pressure variable circulation shape water management system as claimed in claim 3, it is characterised in that preset
Upper Bound Power is equal to 1.5 times of the output of the water pump (1) under industrial frequency control state.
5. constant-pressure variable circulation shape water management system as claimed in claim 1, it is characterised in that hydraulic pressure
Detection device is connected with frequency conversion control unit (2), and hydraulic pressure threshold value is arranged in frequency conversion control unit (2)；
Frequency conversion control unit (2) is according to device for detecting water pressure detected value and hydraulic pressure threshold ratio relatively output control reality water transfer pump
Work；Preset upper limit power and pre-determined lower limit power setting in changeable water supply controller (4), changeable water supply controller (4)
Current real water transfer pump power output is obtained by frequency conversion control unit (2), and by currently real water transfer pump output work
Rate compares with preset upper limit power and pre-determined lower limit power respectively, then controls frequency conversion according to comparative result
Control unit (2) and industrial frequency control unit (3) work.
6. constant-pressure variable circulation shape water management system as claimed in claim 1, it is characterised in that hydraulic pressure
Detection device is connected with changeable water supply controller (4), and hydraulic pressure threshold value, preset upper limit power and pre-determined lower limit power are equal
It is arranged in changeable water supply controller (4)；Changeable water supply controller (4) is by device for detecting water pressure detected value and hydraulic pressure threshold
Value compares, and frequency conversion control unit (2) is according to device for detecting water pressure detected value and hydraulic pressure threshold value comparative result
Control real water transfer pump work；Changeable water supply controller (4) obtains current real water transfer by frequency conversion control unit (2)
Pump power output, and will currently real water transfer pump power output respectively with preset upper limit power and pre-determined lower limit power
Compare, then control frequency conversion control unit (2) and industrial frequency control unit (3) work according to comparative result
Make.
7. constant-pressure variable circulation shape water management system as claimed in claim 1, it is characterised in that water pump
(1) centrifugal pump is used.
8. constant-pressure variable circulation shape water management system as claimed in claim 1, it is characterised in that supply water
Controller (4) uses 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
|---|---|
| CN105971054A true CN105971054A (en) | 2016-09-28 |
| CN105971054B CN105971054B (en) | 2018-04-06 |
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| CN201610369167.4A Active CN105971054B (en) | 2016-05-24 | 2016-05-24 | A kind of constant-pressure variable circulates shape water management system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522312A (en) * | 2016-12-09 | 2017-03-22 | 屈兆辉 | Multi-pump parallel-connection variable frequency and constant pressure control system |
| CN109782633A (en) * | 2017-11-10 | 2019-05-21 | 宁波方太厨具有限公司 | A kind of water tank cleaner automatically adds water control method |
| 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 |
|---|
| 李静: "变频调速恒压供水系统的分析与研究", 《科技信息》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522312A (en) * | 2016-12-09 | 2017-03-22 | 屈兆辉 | Multi-pump parallel-connection variable frequency and constant pressure control system |
| CN109782633A (en) * | 2017-11-10 | 2019-05-21 | 宁波方太厨具有限公司 | A kind of water tank cleaner automatically adds water control method |
| 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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| Publication number | Publication date |
|---|---|
| CN105971054B (en) | 2018-04-06 |
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