CN101581314A - Water pump frequency-control segmentation constant pressure control method - Google Patents
Water pump frequency-control segmentation constant pressure control method Download PDFInfo
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- CN101581314A CN101581314A CNA2008100373088A CN200810037308A CN101581314A CN 101581314 A CN101581314 A CN 101581314A CN A2008100373088 A CNA2008100373088 A CN A2008100373088A CN 200810037308 A CN200810037308 A CN 200810037308A CN 101581314 A CN101581314 A CN 101581314A
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Abstract
The invention relates to a water pump frequency-control segmentation constant pressure control method which comprises the following steps: carrying out flow segmentation according to a working frequency of a frequency converter; offering different pressure setting values to different flow segments to form a stepped pressure control line; and approaching the optimal control pressure. The invention has the advantages of generating the characteristics of saving energy and water and improving water pump control, improving the active efficacy of water supply stability as well as being simple, effective, economical and practical technically.
Description
Technical field
The present invention relates to a kind of pump variable frequency speed regulating method, relate in particular to a kind of water pump frequency-control segmentation constant pressure control method.
Background technique
Existing frequency conversion speed adjusting pump water supply equipment adopts the control of exit of pump constant voltage mostly or claims the constant-pressure variable control mode.This control mode still keep-ups pressure constant when pump capacity reduces, and then makes discharge pressure higher in the required pressure by the pepeline characteristic decision, and flow is more little, and is higher many more.Produce " super flow water outlet " " unnecessary power consumption " and control deviation thus and added disadvantages such as ambassador's control system dynamic characteristic is bad.
The water pump speed change optimization control that can realize in theory is the constant control of pipeline terminal pressure.But the realization of this pattern needs flow instrumentation and mathematical model dynamically to calculate link etc., so technology is complicated, and hardware and software cost is higher, so seldom be used on the less building water supply pressurization complete sets of equipment of general water supply equipment, particularly water pump.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of water pump frequency-control segmentation constant pressure control method, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes by following steps:
Carry out the flow segmentation according to the frequency variator frequency of okperation;
Give different pressure set points to different flow section, form stepped pressure control line;
Approach the optimization pilot pressure.
Compared with prior art, the invention has the beneficial effects as follows: produced energy-conservation, economize on water and improve the water pump control characteristic, improve the positive effect of the stability that supplies water.And brief effective, the economical and practical advantage that possesses skills.
Description of drawings
Fig. 1 is a principle schematic of the present invention;
Fig. 2 realizes circuit module figure of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
Shown in Figure 1 is principle schematic of the present utility model.Curve f0 is (H-Q) characteristic curve under the water pump rated speed among the figure.One group of dotted line f1; F2; Characteristic curve when f3 represents water pump respectively frequency is f1, f2, f3 when frequency control of motor speed.Ho～Hp is a water pump constant voltage guide line, i.e. the pressure set points of water pump automatic speed regulation link, and it is not with a horizontal linear of changes in flow rate.Hl-Hp then is the pressure setting curve of theoretical optimal control, it is the curve that to obtain according to reckoning of rising pipe special parameter or water flowing actual measurement, when the pressure control setting value of obtaining according to the relationship of this curve is controlled, has the effect of the constant and energy-conservation optimum of pipeline terminal pressure.
The segmentation constant voltage control of indication of the present invention shows as H3-A-B-C-D-E-F-Hp among Fig. 1, the staircase curve that line forms.It is characterized in that corresponding different flow section, 0-Q3; Q3-Q2; Q2-Q1, Q1-Q2 pressure set points difference is respectively H3, H2, H1, many more these staircase curves of H0 flow segmentation approach optimization control curve Hl-Hp more.The embodiment that Fig. 1 represents is four segmentations.
The schematic diagram of Fig. 2 circuit that to be the present invention implement for the task of finishing the control of segmentation constant voltage.Figure center 1 is the Dynamic Data Acquiring link, gathers output frequency f continuously from frequency variator, because frequency and flow have corresponding relation, promptly represents the flow segmentation so the judgement link of frame 2 has been carried out segmentation to frequency.Frame 3 is a time delay process, is the misoperation that causes for the transition of getting rid of starting of pump station, stop and regulating when vibration or jump signal.Frame 4 is the output circuit of frequency setting value, and corresponding different segmentation sections have SV0, SV1, different setting value H0, H1, H2, the H3 of SV2, SV3 output respectively.This circuit is connected with automatic speed regulation system, implements undisturbed setting value segmentation and switches, thereby finish the purpose that segmentation constant voltage of the present invention is controlled.Setting value manually inputs to SV0～SV4 after can being obtained by calculating of pipeline waterpower or water test.
Should be noted that the above only is the preferred embodiments of the present invention, for the ordinary skill in the art, can also make some variations under the prerequisite that does not break away from the principle of the invention.Circuit structure particularly shown in Figure 2 can also have different schemes.These changes and improvements all should be considered as belonging to protection scope of the present invention.
Claims (1)
1. water pump frequency-control segmentation constant pressure control method, realize by following steps:
Carry out the flow segmentation according to the frequency variator frequency of okperation;
Give different pressure set points to different flow section, form stepped pressure control line;
Approach the optimization pilot pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100373088A CN101581314A (en) | 2008-05-13 | 2008-05-13 | Water pump frequency-control segmentation constant pressure control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100373088A CN101581314A (en) | 2008-05-13 | 2008-05-13 | Water pump frequency-control segmentation constant pressure control method |
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| Publication Number | Publication Date |
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| CN101581314A true CN101581314A (en) | 2009-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100373088A Pending CN101581314A (en) | 2008-05-13 | 2008-05-13 | Water pump frequency-control segmentation constant pressure control method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982620A (en) * | 2010-10-21 | 2011-03-02 | 中国市政工程东北设计研究总院 | Energy-saving control method for water supply project |
| CN102998972A (en) * | 2012-10-17 | 2013-03-27 | 浙江省电力公司电力科学研究院 | Method for designing intelligent sliding pressure curve for thermal power generating unit on the basis of coordinated control quality |
| CN103835335A (en) * | 2014-03-28 | 2014-06-04 | 杜大虎 | Energy-saving infinite constant-pressure water supply method and device |
| CN106593843A (en) * | 2017-01-16 | 2017-04-26 | 三禾电器(福建)有限公司 | Constant-pressure automatic operation control method for variable speed electric pump |
| CN110566447A (en) * | 2019-10-25 | 2019-12-13 | 青岛中加特电气股份有限公司 | Variable frequency speed regulation control method and control device for pump |
| CN110953169A (en) * | 2019-12-03 | 2020-04-03 | 温州大学 | Control method of parallel variable-frequency constant-voltage control system |
-
2008
- 2008-05-13 CN CNA2008100373088A patent/CN101581314A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982620A (en) * | 2010-10-21 | 2011-03-02 | 中国市政工程东北设计研究总院 | Energy-saving control method for water supply project |
| CN102998972A (en) * | 2012-10-17 | 2013-03-27 | 浙江省电力公司电力科学研究院 | Method for designing intelligent sliding pressure curve for thermal power generating unit on the basis of coordinated control quality |
| CN102998972B (en) * | 2012-10-17 | 2015-07-29 | 浙江省电力公司电力科学研究院 | Based on the fired power generating unit intelligence sliding pressure curve design method of cooperation control quality |
| CN103835335A (en) * | 2014-03-28 | 2014-06-04 | 杜大虎 | Energy-saving infinite constant-pressure water supply method and device |
| CN103835335B (en) * | 2014-03-28 | 2015-04-08 | 杜大虎 | Energy-saving infinite constant-pressure water supply method and device |
| CN106593843A (en) * | 2017-01-16 | 2017-04-26 | 三禾电器(福建)有限公司 | Constant-pressure automatic operation control method for variable speed electric pump |
| CN106593843B (en) * | 2017-01-16 | 2018-07-17 | 三禾电器(福建)有限公司 | A kind of constant pressure automatic running control method of speed electrical pumps |
| CN110566447A (en) * | 2019-10-25 | 2019-12-13 | 青岛中加特电气股份有限公司 | Variable frequency speed regulation control method and control device for pump |
| CN110953169A (en) * | 2019-12-03 | 2020-04-03 | 温州大学 | Control method of parallel variable-frequency constant-voltage control system |
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Open date: 20091118 |