CN102536847A - Flow regulating device for backflow type centrifugal water pump - Google Patents
Flow regulating device for backflow type centrifugal water pump Download PDFInfo
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- CN102536847A CN102536847A CN2012100224906A CN201210022490A CN102536847A CN 102536847 A CN102536847 A CN 102536847A CN 2012100224906 A CN2012100224906 A CN 2012100224906A CN 201210022490 A CN201210022490 A CN 201210022490A CN 102536847 A CN102536847 A CN 102536847A
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Abstract
The invention discloses a flow regulating device for a backflow type centrifugal water pump. The output end of the centrifugal water pump is connected with a first tee joint through a pipeline; the first tee joint is connected with a first flow regulating valve through a pipeline; the first flow regulating valve is connected with a second check valve through a pipeline; the first tee joint is connected with a second flow regulating valve through a pipeline; the second flow regulating valve is connected with a second tee joint through a pipeline; and the second tee joint is respectively connected with a water source and the centrifugal water pump through a pipeline. The invention has the advantages that: steplesss regulation of output flow and pressure is realized in a mode of partial backflow of a pump opening, and backflow water flow is circulated inside the water pump, so that the water pump operates at a position close to the optimal operating point, and the loss of water power is reduced; energy carried by the water pump is fed back to an inlet of the water pump through a water head, so that the power of an input shaft of the water pump is substantially reduced, and the electric energy consumption of the water pump is finally reduced during operation; and the device has a simple structure and low cost.
Description
Technical field
The present invention relates to a kind of output flow and pressure regulator of Centrifugal water pump, a kind of return flow type centrifugal water pump flow regulator that utilizes the size that refluxes water pump output flow and pressure to be implemented control.
Background technique
Centrifugal water pump uses extremely extensive in every profession and trade; In the water pump system design; For the purpose of security insurance, generally select flow, water pump that lift is bigger slightly than requirement of actual working condition for use, utilize the flow pressure controlling device to make it be operated in needed operating mode then.In order to realize the stepless adjustable of its output flow and pressure, generally adopt the adjustment of throttle valve throttling adjustment or motor band frequency variator speed change at present.Throttling is easy to adjust reliable, but is accompanied by bigger energy waste, and this waste is very surprising for large pump.The significant deficiency that scheme is reconciled in existing throttling is it and selects for use big water pump then by forcing throttling that it is operated under the state that departs from best operating point; Name a person for a particular job and cause water impact to lose that is hydraulic loss because pump inner piece geometrical shape, departs from this all by best operating point design.The water pump of for example hundreds of and even last megawatt, the energy loss more than 20% ~ 30% is unrare.Frequency variator adjustment its initial stage input cost for big water pump is bigger, all will be more than 1,000,000 yuan like above-mentioned large pump frequency convertor system that motor is joined investment.
Summary of the invention
The objective of the invention is to, solve above-mentioned existing existing problem, provide a kind of with low cost, can reduce the return flow type centrifugal water pump flow regulator of hydraulic loss.
The present invention is achieved in that main line comprises water source, centrifugal water pump, first flow modulating valve and second safety check; Return-flow structure comprises first threeway, second flow control valve and second threeway; The centrifugal water delivery side of pump connects first threeway through pipeline, and first threeway connects the first flow modulating valve through pipeline, and the first flow modulating valve connects second safety check through pipeline; First threeway connects second flow control valve through pipeline, and second flow control valve connects second threeway through pipeline, and second threeway connects water source, centrifugal water pump inlet respectively through pipeline; Regulate the first flow modulating valve and second flow control valve, can regulate the flow that returns the centrifugal water pump inlet, and then control is via the flow and the pressure of flow control valve output.
Beneficial effect of the present invention:
The present invention utilizes the mode of pumping hole flow partial reflux to realize the stepless adjustment of output flow and pressure, and backwater makes pump working near best operating point in the inner formation circulation of water pump self on the one hand, has reduced hydraulic loss.Its entrained energy head feeds back to pump entrance on the other hand, makes the input shaft power of water pump significantly reduce, and end reaction is that the running consumed power of water pump reduces.
Table 1 and table 2 are two groups of laboratory datas, corresponding respectively existing throttling regulation structure and the used backflow regulation structure of this programme.Need to prove, delivery pressure and flow be first group of data of 0 corresponding be that the first flow modulating valve closes extremely fully, the operating mode when promptly vexed car starts.Contrast two tables are visible, and under the output flow situation identical with pressure, the backflow regulation structure reduces than throttling regulation structure power consumption significantly, and is energy-conservation generally more than 15%.
Table 1 throttle type Flow-rate adjustment structure
| Delivery pressure (Mp) | 0 | 0.4 | 0.22 | 0.25 |
| Output flow (L/30s) | 0 | 10.1 | 8.6 | 5.5 |
| Electric current (A) | 6.4 | 4.82 | 4.85 | 5.1 |
| Current ratio % | 100 | 100 | 100 | 100 |
Table 2 return flow type Flow-rate adjustment structure
| Delivery pressure (Mp) | 0 | 0.4 | 0.22 | 0.25 |
| Output flow (L/30s) | 0 | 10.1 | 8.6 | 5.5 |
| Electric current (A) | 3.5 | 3.97 | 3.96 | 4.1 |
| Current ratio % | 54.7 | 82.4 | 81.6 | 80.4 |
In addition, owing to whole apparatus structure is simple, with low cost, compare with frequency control of motor speed formula regulation structure to have clear superiority.Preresearch estimates, this programme investment is practiced thrift cost more than 90% than frequency control of motor speed formula regulating system.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention.
Embodiment
Specify below in conjunction with accompanying drawing: main line comprises water source, first safety check 7, centrifugal water pump, first flow modulating valve and second safety check; Return-flow structure comprises first threeway 2, second flow control valve 5 and second threeway 6; The output terminal of centrifugal water pump 1 connects first threeway, 2, the first threeways 2 through pipeline and connects first flow modulating valve 3 through pipeline, and first flow modulating valve 3 connects second safety check 4 through pipeline; First threeway 2 connects second flow control valve, 5, the second flow control valves 5 through pipeline and connects second threeway, 6, the second threeways 6 through pipeline and connect water source 8, centrifugal water pump 1 inlet respectively through pipeline.Be connected first safety check 7 through pipeline between second threeway 6 and the water source 8, can prevent that the water in the centrifugal water pump from flowing back to water source 8.Regulate the first flow modulating valve 3 and second flow control valve 5, can regulate the flow that returns the centrifugal water pump inlet, thereby realize flow and pressure control output.
Claims (2)
1. return flow type centrifugal water pump flow regulator, main line comprises water source, centrifugal water pump, first flow modulating valve and second safety check; It is characterized in that return-flow structure comprises first threeway, second flow control valve and second threeway; The centrifugal water delivery side of pump connects first threeway through pipeline, and first threeway connects the first flow modulating valve through pipeline, and the first flow modulating valve connects second safety check through pipeline; First threeway connects second flow control valve through pipeline, and second flow control valve connects second threeway through pipeline, and second threeway connects water source, centrifugal water pump inlet respectively through pipeline; Regulate the first flow modulating valve and second flow control valve, can regulate the flow that returns the centrifugal water pump inlet, and then control is via the flow and the pressure of flow control valve output.
2. be connected first safety check through pipeline between a kind of return flow type centrifugal water pump flow regulator according to claim 1, second threeway and water source, can prevent that the water in the centrifugal water pump from flowing back to the water source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100224906A CN102536847A (en) | 2012-02-02 | 2012-02-02 | Flow regulating device for backflow type centrifugal water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100224906A CN102536847A (en) | 2012-02-02 | 2012-02-02 | Flow regulating device for backflow type centrifugal water pump |
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| CN102536847A true CN102536847A (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2012100224906A Pending CN102536847A (en) | 2012-02-02 | 2012-02-02 | Flow regulating device for backflow type centrifugal water pump |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758763A (en) * | 2014-01-02 | 2014-04-30 | 上海啡忆实业有限公司 | Pressure-variable water pump and application thereof |
| CN105547766A (en) * | 2014-10-27 | 2016-05-04 | 株式会社堀场制作所 | Exhaust gas analyzing system and pumping device |
| CN105757000A (en) * | 2016-04-25 | 2016-07-13 | 张家港市华昌新材料科技有限公司 | Automatic propylene backflow adjusting method |
| CN107816438A (en) * | 2017-10-19 | 2018-03-20 | 北京工研精机股份有限公司 | A kind of centrifugal pump overflow mechanism for multi-station machine tool cooling |
| CN108101134A (en) * | 2017-12-28 | 2018-06-01 | 深圳市山水乐环保科技有限公司 | A kind of Waste water concentrating devices and methods therefor |
| CN108948240A (en) * | 2018-06-11 | 2018-12-07 | 新疆天业（集团）有限公司 | A kind of PVC polymerization anti-polymerization method |
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| JPS56591A (en) * | 1979-06-14 | 1981-01-07 | Toshiba Corp | Preventing device for pump cavitation |
| JPH056591A (en) * | 1991-06-28 | 1993-01-14 | Ricoh Co Ltd | Magneto-optical recording system |
| CN201050838Y (en) * | 2007-05-31 | 2008-04-23 | 广州立昆空调科技有限公司 | Highly effective instant heating type heat pump hot-water system |
| CN101392756A (en) * | 2008-10-31 | 2009-03-25 | 沈阳天成自动化工程有限公司 | Minimum flow control system for centrifugal pump |
| CN201991035U (en) * | 2010-11-10 | 2011-09-28 | 江苏淘镜有限公司 | Constant current water supply apparatus |
| CN202510380U (en) * | 2012-02-02 | 2012-10-31 | 辽宁工业大学 | Flow regulating device of reflux type centrifugal water pump |
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2012
- 2012-02-02 CN CN2012100224906A patent/CN102536847A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56591A (en) * | 1979-06-14 | 1981-01-07 | Toshiba Corp | Preventing device for pump cavitation |
| JPH056591A (en) * | 1991-06-28 | 1993-01-14 | Ricoh Co Ltd | Magneto-optical recording system |
| CN201050838Y (en) * | 2007-05-31 | 2008-04-23 | 广州立昆空调科技有限公司 | Highly effective instant heating type heat pump hot-water system |
| CN101392756A (en) * | 2008-10-31 | 2009-03-25 | 沈阳天成自动化工程有限公司 | Minimum flow control system for centrifugal pump |
| CN201991035U (en) * | 2010-11-10 | 2011-09-28 | 江苏淘镜有限公司 | Constant current water supply apparatus |
| CN202510380U (en) * | 2012-02-02 | 2012-10-31 | 辽宁工业大学 | Flow regulating device of reflux type centrifugal water pump |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758763A (en) * | 2014-01-02 | 2014-04-30 | 上海啡忆实业有限公司 | Pressure-variable water pump and application thereof |
| CN105547766A (en) * | 2014-10-27 | 2016-05-04 | 株式会社堀场制作所 | Exhaust gas analyzing system and pumping device |
| US10428715B2 (en) | 2014-10-27 | 2019-10-01 | Horiba, Ltd. | Exhaust gas analyzing system and pumping device |
| CN105757000A (en) * | 2016-04-25 | 2016-07-13 | 张家港市华昌新材料科技有限公司 | Automatic propylene backflow adjusting method |
| CN107816438A (en) * | 2017-10-19 | 2018-03-20 | 北京工研精机股份有限公司 | A kind of centrifugal pump overflow mechanism for multi-station machine tool cooling |
| CN108101134A (en) * | 2017-12-28 | 2018-06-01 | 深圳市山水乐环保科技有限公司 | A kind of Waste water concentrating devices and methods therefor |
| CN108948240A (en) * | 2018-06-11 | 2018-12-07 | 新疆天业（集团）有限公司 | A kind of PVC polymerization anti-polymerization method |
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Application publication date: 20120704 |