CN102359807A - Control scheme for flow stability of liquid flow device - Google Patents
Control scheme for flow stability of liquid flow device Download PDFInfo
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- CN102359807A CN102359807A CN2011102248173A CN201110224817A CN102359807A CN 102359807 A CN102359807 A CN 102359807A CN 2011102248173 A CN2011102248173 A CN 2011102248173A CN 201110224817 A CN201110224817 A CN 201110224817A CN 102359807 A CN102359807 A CN 102359807A
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- pump
- stability
- rotating speed
- flow
- frequency converter
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- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention relates to a control scheme for flow stability of a liquid flow device. In the scheme, a photoelectric coder, a pulse acquisition card, a frequency converter and a pump are involved. The working principle is that: the photoelectric coder monitors the rotation condition of the pump and transmits acquired rotating speed information to a computer or a programmable logic controller (PLC), the computer or the PLC calculates a corresponding frequency output value by using an appropriate control algorithm according to the current rotating speed value of the pump and a set value and transmits the output value to the frequency converter, and the frequency converter adjusts the rotating speed of the pump. Through the scheme, the stability of the rotating speed of the pump is improved, and the flow stability of the flow device is improved.
Description
Technical field
The present invention relates to field of flow detection, specially refer to a kind of fluid flow device discharge stability controlling schemes.
Background technology
Flow metering has requirements such as high precision, high-level efficiency as the important component part of national economy.The flow standard device as the flux unit value unified with the standard of transmitting, guarantee that the value of China each department and all departments is unified on the standard, for business accounting or arbitration work provide foundation.Therefore the discharge stability that improves the flow standard device is significant.The voltage regulation way of flow standard device has water tower method (permanent liquid level container), container voltage stabilizing method and frequency conversion voltage stabilizing method.The frequency conversion voltage stabilizing method can be saved big quantity space and fund owing to need not build water tower (permanent liquid level container) and pressurizing vessel.In the frequency conversion voltage stabilizing method; Often according to the rotating speed of the variation feedback regulation pump of flow or pump discharge pressure; The present invention proposes a kind of novel frequency conversion voltage stabilizing scheme that changes the feedback regulation revolution speed according to the revolution speed value; Shorten the adjusting path, reduced delay time, further improved the discharge stability of frequency conversion voltage stabilizing method.
Summary of the invention
The present invention includes a photoelectric encoder, a pulse collection card, a frequency converter, a pump.
Principle of work of the present invention is described below: through the rotation situation of a photoelectric encoder monitoring pump; Send the rotary speed information that is collected to computing machine or PLC; Computing machine or PLC calculate the correspondent frequency output valve according to the currency and the setting value of revolution speed through suitable control algolithm.And the frequency output valve passed to frequency converter, regulate the rotating speed of pump through frequency converter.Improve the stability of revolution speed through this scheme, and then improve the discharge stability of fluid flow device.
The invention has the advantages that:
1, the present invention can increase substantially the discharge stability of fluid flow device frequency conversion voltage stabilizing method.
2, the present invention is based on revolution speed control, compare with flow control or pump discharge pressure control, more near disturbance source, disturbance suppression more timely.
3, the present invention is based on revolution speed control, the retardation time of having avoided the control of flow control or pump discharge pressure to be produced, improved the promptness of control.
4, the present invention's pump efficiency of having avoided the pump motor heating to cause descends to the influence of discharge stability.
Description of drawings
Accompanying drawing 1 is controlling schemes process flow diagram of the present invention.
Embodiment
1, a cartridge type photoelectric encoder is installed on the shaft coupling of pump motor and water pump vane, in order to detect tach signal.Shaft coupling top links to each other through keyway with the axle of pump motor, fixes with jackscrew.The axle of shaft coupling bottom and water pump vane is stamped via hole, through bolt.Photoelectric encoder is fixed on the pump housing of water pump through the resilient connection plate.
2, photoelectric encoder output pulse signal passes to computing machine with rotary speed information through the pulse collection card.Computing machine through suitable control algolithm, calculates corresponding frequency converter frequency output valve according to the current tachometer value and the setting value of water pump.Computing machine is through 485 communication setting frequency converter frequency values, and simultaneous computer is monitored current frequency converter actual frequency values.Can improve the speed stability of water pump through suitable control algolithm, and then improve the discharge stability of device.
Claims (3)
1. stepper motor driven pendulum is shunted board-like commutator and is comprised a spreader plate (2), a baffle (3), a stepper motor (5) and a sleeve fixture mechanism.
2. stepper motor driven pendulum according to claim 1 is shunted board-like commutator, it is characterized in that using the step motor drive spreader plate.
3. pass through PLC or computing machine etc., the rotation of control step motor, thereby the time that the control commutator is cut, cut out, speed and acceleration that the position of switching-over start-stop, switching-over are moved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102248173A CN102359807A (en) | 2011-08-08 | 2011-08-08 | Control scheme for flow stability of liquid flow device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102248173A CN102359807A (en) | 2011-08-08 | 2011-08-08 | Control scheme for flow stability of liquid flow device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102359807A true CN102359807A (en) | 2012-02-22 |
Family
ID=45585170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102248173A Pending CN102359807A (en) | 2011-08-08 | 2011-08-08 | Control scheme for flow stability of liquid flow device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102359807A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672100A (en) * | 2012-09-17 | 2014-03-26 | 昆山尚达智机械有限公司 | Novel speed control valve |
| WO2014079215A1 (en) * | 2012-11-23 | 2014-05-30 | 辽宁超烁图码科技板业有限公司 | Control method and control system used for roller coating printing production line |
| WO2014139247A1 (en) * | 2013-03-11 | 2014-09-18 | 辽宁超烁图码科技板业有限公司 | Method for producing steel plate with patterns by combining roller-coating printing and screen printing |
| CN104236684A (en) * | 2014-10-16 | 2014-12-24 | 广州能源检测研究院 | Fluid reversing device and guide-in and guide-out time difference compensation method thereof |
| CN104776896A (en) * | 2015-03-30 | 2015-07-15 | 东南大学 | Dynamic verification system and method of liquid flow instrument |
| CN106908121A (en) * | 2017-01-17 | 2017-06-30 | 北京远东仪表有限公司 | A kind of flow apparatus reclaimed water discharge stability detection method and detecting system |
| CN110174145A (en) * | 2019-07-05 | 2019-08-27 | 广州论衡控制设备有限公司 | Intelligent accurate metering device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2781437Y (en) * | 2005-02-21 | 2006-05-17 | 汕头市金福电器厂有限公司 | Water pump controller |
| CN201065802Y (en) * | 2007-07-30 | 2008-05-28 | 中国航空动力机械研究所 | Frequency changing quantitative oil-supply device for fuel oil |
| CN201114166Y (en) * | 2007-06-07 | 2008-09-10 | 江苏迎浪科技集团有限公司 | Pump intelligence control system based on PROFIBUS-DP communication interface |
| CN201382031Y (en) * | 2009-04-01 | 2010-01-13 | 东华机械有限公司 | Generating device of servo hydraulic pump station |
| CN201488753U (en) * | 2009-04-30 | 2010-05-26 | 福建闽机机械科技有限公司 | Flow test device of plumbing products |
| CN201874040U (en) * | 2010-11-15 | 2011-06-22 | 上海凯泉泵业（集团）有限公司 | Constant-pressure water supply equipment |
-
2011
- 2011-08-08 CN CN2011102248173A patent/CN102359807A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2781437Y (en) * | 2005-02-21 | 2006-05-17 | 汕头市金福电器厂有限公司 | Water pump controller |
| CN201114166Y (en) * | 2007-06-07 | 2008-09-10 | 江苏迎浪科技集团有限公司 | Pump intelligence control system based on PROFIBUS-DP communication interface |
| CN201065802Y (en) * | 2007-07-30 | 2008-05-28 | 中国航空动力机械研究所 | Frequency changing quantitative oil-supply device for fuel oil |
| CN201382031Y (en) * | 2009-04-01 | 2010-01-13 | 东华机械有限公司 | Generating device of servo hydraulic pump station |
| CN201488753U (en) * | 2009-04-30 | 2010-05-26 | 福建闽机机械科技有限公司 | Flow test device of plumbing products |
| CN201874040U (en) * | 2010-11-15 | 2011-06-22 | 上海凯泉泵业（集团）有限公司 | Constant-pressure water supply equipment |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672100A (en) * | 2012-09-17 | 2014-03-26 | 昆山尚达智机械有限公司 | Novel speed control valve |
| WO2014079215A1 (en) * | 2012-11-23 | 2014-05-30 | 辽宁超烁图码科技板业有限公司 | Control method and control system used for roller coating printing production line |
| WO2014139247A1 (en) * | 2013-03-11 | 2014-09-18 | 辽宁超烁图码科技板业有限公司 | Method for producing steel plate with patterns by combining roller-coating printing and screen printing |
| CN104236684A (en) * | 2014-10-16 | 2014-12-24 | 广州能源检测研究院 | Fluid reversing device and guide-in and guide-out time difference compensation method thereof |
| CN104236684B (en) * | 2014-10-16 | 2017-05-17 | 广州能源检测研究院 | Fluid reversing device and guide-in and guide-out time difference compensation method thereof |
| CN104776896A (en) * | 2015-03-30 | 2015-07-15 | 东南大学 | Dynamic verification system and method of liquid flow instrument |
| CN104776896B (en) * | 2015-03-30 | 2018-02-23 | 东南大学 | A kind of fluid flow instrument dynamic calibration system and method |
| CN106908121A (en) * | 2017-01-17 | 2017-06-30 | 北京远东仪表有限公司 | A kind of flow apparatus reclaimed water discharge stability detection method and detecting system |
| CN106908121B (en) * | 2017-01-17 | 2019-05-21 | 北京远东仪表有限公司 | Water flow Detection of Stability method and detection system in a kind of flow apparatus |
| CN110174145A (en) * | 2019-07-05 | 2019-08-27 | 广州论衡控制设备有限公司 | Intelligent accurate metering device |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120222 |
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| WD01 | Invention patent application deemed withdrawn after publication |