CN103835335A - Energy-saving infinite constant-pressure water supply method and device - Google Patents
Energy-saving infinite constant-pressure water supply method and device Download PDFInfo
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- CN103835335A CN103835335A CN201410121787.7A CN201410121787A CN103835335A CN 103835335 A CN103835335 A CN 103835335A CN 201410121787 A CN201410121787 A CN 201410121787A CN 103835335 A CN103835335 A CN 103835335A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 25
- 238000005086 pumping Methods 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 3
- 230000003020 moisturizing effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000004134 energy conservation Methods 0.000 description 5
- 102220013598 rs4252582 Human genes 0.000 description 3
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- 102220037233 rs115173026 Human genes 0.000 description 2
- 102220006681 rs16991547 Human genes 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention discloses an energy-saving infinite constant-pressure water supply method. The method includes the following steps that firstly, a high-lift stabilized-pressure pump and at least one low-lift make-up pump are arranged in a water supply system; secondly, in the water supply process, based on variable-frequency residual quantity pressure stabilization of the stabilized-pressure pump, the make-up pump is adjusted in a spiral wriggling mode to carry out pressure stabilizing and water supply. In the second step, when pressurizing is carried out, the make-up pump operates in a variable-frequency mode through spiral wriggling until the power frequency is reached, and meanwhile the stabilized-pressure pump adjusts the water supply residual quantity at any time in a variable-frequency mode; when pressure reduction is carried out, the make-up pump stops in a variable-frequency mode through spiral wriggling, and the stabilized-pressure pump adjusts the water supply residual quantity at any time in a variable-frequency mode. According to the spiral wriggling mode, the variable-frequency amplitude of the make-up pump within the range of 0-1/2 power frequency is larger than the variable-frequency amplitude of the make-up pump within the range of 1/2-1 power frequency. By means of the method, water supply pressure is greatly stabilized, and the energy saving effect is fully embodied.
Description
Technical field
The present invention relates to secondary water-supply field, specifically, relate to a kind of energy-saving electrodeless constant pressure water supply method and apparatus based on secondary water supply system.
Background technology
Water is Source of life, and along with urban life community is increasingly intensive, highrise building is on the increase, one of major way that secondary water-supply has become to serve a town with water.Conventionally the alleged secondary water-supply unit of referring to or the individual of people supplies water city public water supply or self-built facility through storing, pressurizeing, and supplies user or personal form by pipeline again.
In the supercharging equipment of existing this water system, use nothing more than four kinds of technological means to reach supercharging.Wherein, the first is to use frequency conversion loop control technology, and by the water pump of several same flows of a Frequency Converter Control, lift, to reach the object of frequency-changing pressure stabilizing, hydraulic pressure is relatively stable but not energy-conservation.The second is to drag a water pump with a Frequency Converter Control, can reach like this energy-saving effect, but several water pumps is power frequency startups, and hydraulic pressure is stable not.The third is in the first, to add stabilized pressure pump (or being ight pump), uses when ebb water at night, can solve certain power saving.The 4th kind is in the first, and every pump is joined a Frequency Converter Control, can solve certain stable water pressure problem, but does not thoroughly solve power saving.Particularly, with an example explanation, establish a set of supply equipment with 20T, two pump workings of 70m lift, if water supply volume scope fluctuates between 18 ~ 23T now, in the time that water supply volume is 18T/h, a pump can solve, and now can reach constant voltage by variable frequency control, and hydraulic pressure is relatively stable.In the time that water supply volume reaches 23T/h, pump frequency conversion is after power frequency 50Hz, and it is still inadequate that the water yield reaches 20T/h, needs second pump startup operation, working method be second pump with power frequency startup, and First pump is shut down, and is converted to corresponding water amount from 0Hz.In this process, in order to prevent booster phenomenon, generally have the process of a 5 ~ 10s, if this hourly water consumption reduces (as dropped to again 18 T/h) again, must cut off so in two water pumps, simultaneously variable frequency starting another.Because power frequency termination of pumping meeting causes hydraulic pressure to decline suddenly, in variable frequency starting process, can not supplement in time again, just cause water pressure fluctuations, repeatedly so just cause hydraulic pressure shakiness and outstanding problem.Existing several boost mode, although solve certain power saving, still intelligent not, accurate, comprehensive, and the outstanding problem of hydraulic pressure less stable, need improvement badly.
Summary of the invention
The object of the present invention is to provide a kind of energy-saving electrodeless constant pressure water supply method, mainly solve in existing water system the hydraulic pressure existing in secondary water supply system especially and regulate unstable, Energy Saving Control intelligence problem accurately not.
To achieve these goals, the technical solution used in the present invention is as follows:
Energy-saving electrodeless constant pressure water supply method, comprises the steps:
(1) a high-lift stabilized pressure pump is set in water system, and the small pump of at least one low lift;
(2) while water supply, take the frequency conversion residual quantity voltage stabilizing of stabilized pressure pump as basis, adopt spiral wriggling mode to regulate small pump to carry out pressure-stabilizing water supply;
(2a) in the time of pressurization, small pump is by spiral wriggling mode converting operation, until power frequency, simultaneously stabilized pressure pump variable frequency adjustment water supply at any time residual quantity;
(2b) when when decompression, small pump is by spiral wriggling mode frequency conversion termination of pumping, stabilized pressure pump variable frequency adjustment water supply at any time residual quantity simultaneously;
Wherein, described spiral wriggling mode is that the frequency conversion amplitude of small pump within the scope of 0 ~ 1/2 power frequency is greater than the frequency conversion amplitude within the scope of 1/2 ~ 1 power frequency.
Particularly, the flow value of described stabilized pressure pump is less than the flow value of small pump, and described stabilized pressure pump and moisturizing pump lift are relative value.
Based on above-mentioned electrodeless constant-pressure energy-saving method of supplying water, the present invention also provides a kind of energy-saving electrodeless constant pressure water supply equipment, comprise and access a high-lift stabilized pressure pump of water system and the small pump of at least one low lift, corresponding every frequency converter that stabilized pressure pump is connected respectively with small pump, and the PID controller being all connected with all frequency converters.
Further, between described PID controller and frequency converter, be also provided with contactor KM.
Key point of the present invention is, inventor finds that the water pump variation of frequency conversion amplitude and variation of output in conversion process are not equal proportion in practice, that is to say if reach identical output and change ratio, frequency conversion amplitude when lower than 1/2 power frequency can be greater than the frequency conversion amplitude while exceeding 1/2 power frequency, thus, as long as by reasonably regulating frequency conversion amplitude, can make water pump give full play to its performance, realize energy-conservation object, simultaneously, when this some combination is used in water-supply voltage-stabilizing, under the condition that is at least equipped with 2 pumps by rational variable frequency adjustment, just can realize voltage stabilizing and energy-conservation double combination.
Compared with prior art, the present invention has following beneficial effect:
Property when the present invention has utilized pump variable frequency work is by reasonably regulating, in conjunction with the common cooperating operation of stabilized pressure pump and small pump, the hydraulic pressure shakiness existing in existing water system, energy-conservation not problem have accurately been solved intelligently comprehensively, greatly stablize water supply pressure, and realized fully energy-saving effect, there is outstanding substantive distinguishing features and significant progressive, and the present invention uses very convenient, simple to operate, be with a wide range of applications, be applicable to applying.
Accompanying drawing explanation
Fig. 1 is the efficacy curve figure of stabilized pressure pump in the present invention-embodiment.
Fig. 2 is the efficacy curve figure of small pump in the present invention-embodiment.
Fig. 3 is the theory diagram installing in the present invention.
Fig. 4 is the schematic diagram of PID controller in the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described, and embodiments of the present invention include but not limited to the following example.
As shown in Figures 1 to 4, this energy-saving electrodeless constant pressure water supply method, comprises the steps:
(1) a high-lift stabilized pressure pump is set in water system, and the small pump of a low lift; Wherein, the height of lift is relative value, and the voltage stabilizing pump lift of selecting according to the required standard lift of water system in the time selecting pump is higher than standard value, and moisturizing pump lift equals standard value, and the flow value of stabilized pressure pump is less than the flow value of small pump;
(2) while water supply, take the frequency conversion residual quantity voltage stabilizing of stabilized pressure pump as basis, adopt spiral wriggling mode to regulate small pump to carry out pressure-stabilizing water supply, specifically:
(2a) in the time of pressurization, small pump is by spiral wriggling mode converting operation, until power frequency, simultaneously stabilized pressure pump variable frequency adjustment water supply at any time residual quantity;
(2b) when when decompression, small pump is by spiral wriggling mode frequency conversion termination of pumping, stabilized pressure pump variable frequency adjustment water supply at any time residual quantity simultaneously;
Wherein, described spiral wriggling mode is that the frequency conversion amplitude of small pump within the scope of 0 ~ 1/2 power frequency is greater than the frequency conversion amplitude within the scope of 1/2 ~ 1 power frequency.
Based on above-mentioned electrodeless constant-pressure energy-saving method of supplying water, the present invention also provides a kind of energy-saving electrodeless constant pressure water supply equipment, comprise and access a high-lift stabilized pressure pump of water system and the small pump of four low lifts, corresponding every frequency converter that stabilized pressure pump is connected respectively with small pump, and the PID controller being all connected with all frequency converters.Further, between described PID controller and frequency converter, be also provided with contactor KM.
Wherein, as shown in Figure 4, PID controller be specifically set to 1,2 for dead end for subsequent use; 3 be 485 communication interfaces+; 4 be 485 communication interfaces-; 5 is signal ground; 6,7,8 is input signal port; 9 for lacking pump port; 10 is the second pressure signal input; 11 is CM2(signal common port); 12 is D/A1 frequency conversion stabilized pressure pump (DC0-10V output); 13 is D/A2 small pump (DC0-10V output); 14 is D/A3 small pump (DC0-10V output); 15 is D/A4 small pump (DC0-10V output); 16 is D/A5 small pump (DC0-10V output); 17 ~ 21 is that contact is controlled in stabilized pressure pump and small pump operation.
Parameter declaration: work as P=0, all parameter types are set can revise (0 ~ 10); P01 pressure set points (0 ~ 2.5MP); P02 pump work line (P02 1 only has a pump, and being 2 has 2 pumps, and 3,4,5 in like manner); P03=6 is that No. 21 ports are ight water pump; P04 is under-voltage adds the pump time (1-200 second); P05 superpressure subtracts the pump time (1-200 second); P06 output voltage is selected (1-2) (1.0 ~ 10V 2.0-5V); P07 sensor signal is selected (1-2) (1.0-5V 2.1-5V (4-20mA)); P08 transducer range is selected (0.6,1.0,1.6,2.5MP); P09 sensor temperature is proofreaied and correct (0-100%); The manual output frequency control of P10 (can select 12345 difference); The control of P11 D/A output frequency (1 or 2 wherein 1 for output frequency self-control, 2 be manually control); P12 upper limit pressure setting; P13 water pump sleep frequency (be preferably chosen as at 0 o'clock without); P14 water pump sleep stand-by period (1-60 minute); P15 excessive low water level protection arranges (P15=0 is nothing, when P15=1, has); The attached school of P16 pump drops into frequency (0-50HZ, this is stabilized pressure pump operating frequency, is less than this frequency and only has this pump work time to exceed P17 setting-up time); P17 school pump drops into the stand-by period (1-60 minute); The minimum output frequency of P18 water pump (0-50HZ, only effective to stabilized pressure pump and ight pump); P19 sleep starting-up deviation (0 ~ 1.0MP); P20 timed switching function (P20=0 without, when P20=1, timing level pressure supply water, when P20=2, timesharing dividing potential drop supply water); P21 ~ P33 is respectively (six open and close times are set); P34 ~ P39(period pressure setting); P40 system clock is adjusted; P42 booster is shut down and is set (P39=0 without, P39=1 has); P43 ~ P44 is C2-5 pump start-stop time (1-300 second).
When concrete operation, with Q total=40T, hydraulic pressure 7MPA is example, according to water pump standard, the small pump flow value of selecting is 20T/h, lift is 70m, power is 7.5Kw, Flow rate of steady pressure pump value is 16T/h, lift is 91, power is 7.5Kw.
From water pump efficacy curve, figure can find out, variable frequency pump can fluctuate within the scope of a large effective head, realizes flow, pressure balance within the specific limits, reaches water pump constant pressure frequency conversion, energy-conservation object.
Suppose to need 0.7MPA pressure, this hourly water consumption is little, needs constant voltage, if now select the water pump of 70m lift, from water pump curve map can know need Hz more than 40 operation can, and as carry out pressurize operation by the inventive method, frequency will reduce greatly, observe by experiment and can reach the operation of 20Hz frequency.According to computing, in the time that frequency is 45Hz operation, P`/P is 0.729, fractional energy savings 27.1%; And in the time that frequency is 25Hz operation, P`/P is 0.125, fractional energy savings is 87.5%, can greatly improve energy-saving effect.
The present embodiment is a stabilized pressure pump, two small pumps, and the concrete method of operation is as follows:
When water supply volume increases, the method for operation is
| Water supply volume increases | Stabilized pressure pump | Small pump | |
| 0 | Converting operation | ? | ? |
| 33% | Converting operation | Frequency conversion spiral starts | ? |
| 66% | Converting operation | Power frequency operation | Frequency conversion spiral starts |
| 100% | Converting operation | Power frequency operation | Power frequency operation |
When water supply volume reduces, the method for operation is
| Water supply volume reduces | Stabilized pressure pump | Small pump | |
| 100% | Converting operation | Power frequency operation | Power frequency operation |
| 66% | Converting operation | Power frequency operation | Frequency conversion spiral stops |
| 33% | Converting operation | Frequency conversion spiral stops | ? |
| 0 | Converting operation | ? | ? |
According to above-described embodiment, just can realize well the present invention.What deserves to be explained is; under prerequisite based on said structure design, for solving same technical problem, even if some that make in the present invention are without substantial change or polishing; the essence of the technical scheme adopting is still consistent with the present invention, also should be in protection scope of the present invention.
Claims (5)
1. energy-saving electrodeless constant pressure water supply method, is characterized in that, comprises the steps:
(1) a high-lift stabilized pressure pump is set in water system, and the small pump of at least one low lift;
(2) while water supply, take the frequency conversion residual quantity voltage stabilizing of stabilized pressure pump as basis, adopt spiral wriggling mode to regulate small pump to carry out pressure-stabilizing water supply;
(2a) in the time of pressurization, small pump is by spiral wriggling mode converting operation, until power frequency, simultaneously stabilized pressure pump variable frequency adjustment water supply at any time residual quantity;
(2b) when when decompression, small pump is by spiral wriggling mode frequency conversion termination of pumping, stabilized pressure pump variable frequency adjustment water supply at any time residual quantity simultaneously;
Wherein, described spiral wriggling mode is that the frequency conversion amplitude of small pump within the scope of 0 ~ 1/2 power frequency is greater than the frequency conversion amplitude within the scope of 1/2 ~ 1 power frequency.
2. energy-saving electrodeless constant pressure water supply method according to claim 1, is characterized in that, the flow value of described stabilized pressure pump is less than the flow value of small pump.
3. energy-saving electrodeless constant pressure water supply method according to claim 1, is characterized in that, described stabilized pressure pump and moisturizing pump lift are relative value.
4. application rights requires the energy-saving electrodeless constant pressure water supply equipment of method described in 1 ~ 3, it is characterized in that, comprise and access a high-lift stabilized pressure pump of water system and the small pump of at least one low lift, corresponding every frequency converter that stabilized pressure pump is connected respectively with small pump, and the PID controller being all connected with all frequency converters.
5. energy-saving electrodeless constant pressure water supply equipment according to claim 4, is characterized in that, between described PID controller and frequency converter, is also provided with contactor KM.
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| CN201410121787.7A CN103835335B (en) | 2014-03-28 | 2014-03-28 | Energy-saving infinite constant-pressure water supply method and device |
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| CN103835335B CN103835335B (en) | 2015-04-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104991510A (en) * | 2015-07-20 | 2015-10-21 | 上海意利法暖通科技有限公司 | One-in-service-one-standby water pump variable frequency electric control system and control method |
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| CN201588252U (en) * | 2009-04-17 | 2010-09-22 | 开利泵业(集团)有限公司 | Non-negative pressure water supplying device |
| JP2010275688A (en) * | 2009-05-26 | 2010-12-09 | Sayama Seisakusho:Kk | Boost water supply system for high-rise building |
| CN202298755U (en) * | 2011-11-10 | 2012-07-04 | 渤海大学 | Efficient cluster water pump system for constant-voltage converting quantities |
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- 2014-03-28 CN CN201410121787.7A patent/CN103835335B/en active Active
Patent Citations (5)
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| CN101581314A (en) * | 2008-05-13 | 2009-11-18 | 开利泵业(集团)有限公司 | Water pump frequency-control segmentation constant pressure control method |
| RU2399396C1 (en) * | 2009-04-08 | 2010-09-20 | Общество с ограниченной ответственностью "Центртехкомплект" | Method of domestic and fire water system and unit for implementation thereof |
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| JP2010275688A (en) * | 2009-05-26 | 2010-12-09 | Sayama Seisakusho:Kk | Boost water supply system for high-rise building |
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Non-Patent Citations (1)
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| 张召伟: "变频调速给水技术的节能原理及应用", 《能源与节能》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104991510A (en) * | 2015-07-20 | 2015-10-21 | 上海意利法暖通科技有限公司 | One-in-service-one-standby water pump variable frequency electric control system and control method |
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| CN103835335B (en) | 2015-04-08 |
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Effective date of registration: 20171127 Address after: 610000, No. 19, No. 1, building 5, 1, No. 177, Tianfu Road, Chengdu hi tech Zone, Sichuan Patentee after: Sichuan Bohai Water Supply Equipment Co., Ltd. Address before: 610000 No. 15, Yongfeng Road, hi tech Zone, Sichuan, Chengdu Patentee before: Du Dahu |