CN101191738A - Differential pressure type liquid flowmeter - Google Patents
Differential pressure type liquid flowmeter Download PDFInfo
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- CN101191738A CN101191738A CNA2006101368105A CN200610136810A CN101191738A CN 101191738 A CN101191738 A CN 101191738A CN A2006101368105 A CNA2006101368105 A CN A2006101368105A CN 200610136810 A CN200610136810 A CN 200610136810A CN 101191738 A CN101191738 A CN 101191738A
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Abstract
The invention relates to a differential pressure type liquid flow meter which has pretty good flow range expansibility and the bidirectional measurement function and by which the volume flow rate, mass flow rate and the flow velocity can be measured, wherein an input tube, a throat tube and an output tube are connected to be a straight line, forming a straight through channel, or the input tube, the throat tube and the output tube which are bended to a certain angle are connected with each other, forming a curved channel; the invention also comprises an input end pressure branch tube, an output pressure branch tube and a differential pressure type pressure sensor, wherein ends of the input end pressure branch tube and the output pressure branch tube are symmetrically or asymmetrically connected with the input tube and the output tube respectively, other ends are connected with the differential pressure type pressure sensor. The invention has the advantages of simple structure, stable performance, easy processing circuit, bidirectional measurement of flow rate. A micro flow meter can be designed based on the invention, which has stable performance of whole machine, good sensitivity and high measure accuracy, thereby the invention is suitably designed to be the liquid flow velocity and liquid flow rate meter with different measure range.
Description
Technical field
The present invention relates to a kind of liquid flowmeter, particularly a kind of flow range extendability well, a kind of differential pressure type liquid flowmeter of energy measurement volume flow rate, mass flowrate, flow velocity and bidirectional measuring.Be widely used in the liquid accurate measurement and the automation field of industries such as medical science, industry, agricultural, chemical industry.
Background technology
Liquid flowmeter is used very extensive, its structure and of a great variety, but most structure is complicated, and design and making trouble the more important thing is that the liquid flowmeter of low discharge, tiny flow quantity does not almost have at home.For this reason, we this differential pressure type liquid flowmeter is provided is exactly for the low flow rate liquid accurate measurement that solves each field and the needs of automation field.
Summary of the invention
Order of the present invention ground is at above-mentioned the deficiencies in the prior art, provide a kind of extendability better, liquid flowmeter that can the large and small different flow of bidirectional measurement.Also can design simultaneously the multi-functional intellectual flowmeter of measuring the liquids and gases flow.
The technical solution adopted in the present invention is: the present invention is made up of input pipe, efferent duct, trunnion, input end (upstream extremity) pressure arm, output terminal (downstream end) pressure arm, differential pressure type pressure transducer, voltage modulate circuit, AD converter and microprocessor or numeral, analog secondary instrument (owing to be prior art, Gu Tuzhong does not draw).Input pipe, trunnion, efferent duct are connected into in-line, connect into straight-through passage; Also flexible certain angle connects into crooked passage.Throat pipe diameter than input pipe (also can be feed tube), efferent duct (also can be drain pipe) is little or equate with input pipe, efferent duct, is used to produce pressure breakdown, has hypotensive effect; The input pipe efferent duct respectively leaves a mouth, be used for connecting input end pressure arm and output terminal pressure arm respectively, one end of input end pressure arm, output terminal pressure arm is connected on input pipe and the efferent duct symmetrical respectively or asymmetricly, another termination differential pressure type pressure transducer, the output terminal of differential pressure type pressure transducer connects the voltage modulate circuit, and the voltage modulate circuit connects Displaying Meter again.This pipe level is placed, and also can be designed to vertical or the placement of tilting.
The invention has the beneficial effects as follows: pressure sensor structure is simple, cheap, function admirable, and the linearity is good; Can be designed to the tiny flow quantity meter, the range ability favorable expandability can be carried out bidirectional measurement; Micro-processor interface circuit is simple, stable performance.The complete machine dependable performance, highly sensitive, the measuring accuracy height; Be particularly suitable for being designed to liquid or the gas flow rate and the flowmeter of different ranges.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples
Fig. 1 is differential pressure type liquid flowmeter of the present invention (throat pipe diameter is littler than input, an efferent duct) structural representation.
Fig. 2 is another embodiment of the present invention differential pressure type liquid flowmeter (throat pipe diameter equates with input, efferent duct) structural representation.
Fig. 3 is pressure sensor circuit figure of the present invention.
Fig. 4 is pressure sensor signal conditioning circuit of the present invention (voltage modulate circuit) figure.
Among the figure: 1. 9. air 10. connection terminal joints 11. connection terminal joints 12. connection terminal joints 13. apertures of input pipe 2. trunnions 3. efferent ducts 4. differential pressure type pressure transducers 5. connection terminal joints 6. input end pressure arms 7. output terminal pressure arms 8. liquid to be measured (red color is represented).
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4,, a kind of differential pressure type liquid flowmeter is made up of input pipe 1, efferent duct 3, trunnion 2, input end (upstream extremity) pressure arm 6, output terminal (downstream end) pressure arm 7, differential pressure type pressure transducer 4, voltage modulate circuit, AD converter and microprocessor or numeral, analog secondary instrument (owing to be prior art, Gu Tuzhong does not draw).Input pipe 1, trunnion 2, efferent duct 3, input end pressure arm 6 and output terminal pressure arm 7 can be made with plastics, glass or metal tube, and also available other material is made.Input pipe 1, trunnion 2, efferent duct 3 are connected into in-line by method shown in Figure 1, connect into straight-through passage (also flexible certain angle connects into crooked passage), and trunnion 2 diameters are littler than input pipe 1, efferent duct 3; Be connected into in-line by method shown in Figure 2, connect into straight-through passage (also flexible angled, as to connect into crooked passage), trunnion 2 diameters equate with input pipe 1, efferent duct 3, are used to produce pressure breakdown, have hypotensive effect.Input pipe 1 efferent duct 3 respectively leaves an aperture 13, be used for connecting input end pressure arm 6 and output terminal pressure arm 7 respectively, one end of input end pressure arm 6, output terminal pressure arm 7 is connected on input pipe 1 and the efferent duct 3 another termination differential pressure type pressure transducer 4 symmetrical respectively or asymmetricly; Input end pressure arm 6, output terminal pressure arm 7 are used to differential pressure type pressure transducer 4 that pressure is provided, differential pressure type pressure transducer or other similar differential pressure type pressure transducers such as wherein said differential pressure type pressure transducer 4 usefulness 24PC or 26PC.This pipe level is placed (also can be designed to vertical or the placement of tilting).Differential pressure type liquid flowmeter principle is for when flow of liquid is crossed input pipe 1, trunnion 2, efferent duct 3, because the viscous effect of liquid, trunnion has inhibition to liquid, cause the pressure of the pressure of upstream extremity pressure pipe greater than downstream end pressure pipe, fluid flow is big, and input, efferent duct pressure reduction are also just big, and pressure differential is directly related with flow velocity, the big more pressure reduction of flow velocity is big more, and flow velocity small pressure difference more is more little.The differential pressure type pressure transducer converts the variation of pressure differential to voltage signal, send the demonstration of aanalogvoltage table or send A/D change-over circuit to the voltage signal amplification with after handling, and send microprocessor processes and demonstration again; Obtain volume flow rate, mass flowrate, flow velocity and the flow direction of liquid by the microprocessor conversion.Can change the range ability of this flowmeter by the size that changes input, efferent duct and trunnion.
Can be designed to the liquid flowmeter of bidirectional measurement.The pressure reduction of input, efferent duct is sent to differential pressure pickup by the pressure arm 6 and 7 at minute two ends and detects, and is converted to the correspondent voltage signal
Fig. 4 is one of pressure sensor signal conditioning circuit (voltage modulate circuit) figure, its input termination pressure transducer connection terminal joint 10, connection terminal joint 12, its other voltage modulate circuit of output termination, AD converter or numeral, analog secondary instrument; Enlargement factor among Fig. 4 can be determined by regulator potentiometer R.
Claims (6)
1. differential pressure type liquid flowmeter, comprise input pipe (1), efferent duct (3), trunnion (2), voltage modulate circuit, AD converter and microprocessor or numeral, analog secondary instrument, it is characterized in that: a). input pipe (1), trunnion (2), efferent duct (3) are connected into in-line, connect into straight-through passage, also flexible certain angle connects into crooked passage; B). be provided with input end pressure arm (6), output terminal pressure arm (7) and differential pressure type pressure transducer (4), one end of input end pressure arm (6), output terminal pressure arm (7) is connected on input pipe (1) and the efferent duct (3) symmetrical respectively or asymmetricly, another termination differential pressure type pressure transducer (4), the output terminal of differential pressure type pressure transducer (4) connects the voltage modulate circuit, and the voltage modulate circuit connects Displaying Meter again.
2. a kind of differential pressure type liquid flowmeter according to claim 1 is characterized in that: input pipe (1) efferent duct (3) respectively leaves an aperture (13), is used for connecting input end pressure arm (6) and output terminal pressure arm (7) respectively.
3. a kind of differential pressure type liquid flowmeter according to claim 1 is characterized in that: trunnion (2) diameter equates with input pipe (1), efferent duct (3) or is littler than input pipe (1), efferent duct (3).
4. a kind of differential pressure type liquid flowmeter according to claim 1, it is characterized in that: input pipe (1), trunnion (2), efferent duct (3), input end pressure arm (6) and the available plastics of output terminal pressure arm (7), glass or metal tube are made, and also available other material is made.
5. a kind of differential pressure type liquid flowmeter according to claim 1 is characterized in that: differential pressure type pressure transducer (4) is with differential pressure type pressure transducer or other similar differential pressure type pressure transducers such as 24PC or 26PC.
6. according to claim 1 or the described a kind of differential pressure type liquid flowmeter of claim 3, it is characterized in that: the liquid flowmeter that can be designed to bidirectional measurement, input pipe (1), trunnion (2), efferent duct (3) pipe level are placed, and also can be designed to vertical or the placement of tilting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101368105A CN101191738A (en) | 2006-12-02 | 2006-12-02 | Differential pressure type liquid flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101368105A CN101191738A (en) | 2006-12-02 | 2006-12-02 | Differential pressure type liquid flowmeter |
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| Publication Number | Publication Date |
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| CN101191738A true CN101191738A (en) | 2008-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006101368105A Pending CN101191738A (en) | 2006-12-02 | 2006-12-02 | Differential pressure type liquid flowmeter |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033294A (en) * | 2011-10-05 | 2013-04-10 | 财团法人工业技术研究院 | Reading device and reading method of sensor array |
| CN103575433A (en) * | 2012-07-19 | 2014-02-12 | 财团法人工业技术研究院 | Sensor reading device and driving method |
| CN103674146A (en) * | 2012-09-21 | 2014-03-26 | 上海迪纳声科技股份有限公司 | Mass flow meter based on ultrasonic flow meter |
| CN104949718A (en) * | 2015-06-12 | 2015-09-30 | 浙江大学 | Self-circulation open channel experimental device with teaching effect flow digital display function |
| CN104952324A (en) * | 2015-06-12 | 2015-09-30 | 浙江大学 | Venturi meter experimental device with synchronous digital display |
| CN105953848A (en) * | 2016-05-23 | 2016-09-21 | 西北工业大学 | Differential-pressure linear flowmeter |
| CN107247156A (en) * | 2017-07-31 | 2017-10-13 | 长江大学 | A kind of flow rate measuring device and implementation based on pressure sensitive |
| CN114113663A (en) * | 2021-11-24 | 2022-03-01 | 上海航天设备制造总厂有限公司 | Detection device for flow velocity measurement and flow field monitoring |
-
2006
- 2006-12-02 CN CNA2006101368105A patent/CN101191738A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103033294A (en) * | 2011-10-05 | 2013-04-10 | 财团法人工业技术研究院 | Reading device and reading method of sensor array |
| CN103575433B (en) * | 2012-07-19 | 2015-12-16 | 财团法人工业技术研究院 | Sensor reading device and driving method |
| US9074954B2 (en) | 2012-07-19 | 2015-07-07 | Industrial Technology Research Institute | Readout apparatus and driving method for sensor |
| CN103575433A (en) * | 2012-07-19 | 2014-02-12 | 财团法人工业技术研究院 | Sensor reading device and driving method |
| CN103674146A (en) * | 2012-09-21 | 2014-03-26 | 上海迪纳声科技股份有限公司 | Mass flow meter based on ultrasonic flow meter |
| CN104949718A (en) * | 2015-06-12 | 2015-09-30 | 浙江大学 | Self-circulation open channel experimental device with teaching effect flow digital display function |
| CN104952324A (en) * | 2015-06-12 | 2015-09-30 | 浙江大学 | Venturi meter experimental device with synchronous digital display |
| CN104952324B (en) * | 2015-06-12 | 2018-01-02 | 浙江大学 | A kind of Venturi meter experimental provision for possessing synchronous flow digital display |
| CN105953848A (en) * | 2016-05-23 | 2016-09-21 | 西北工业大学 | Differential-pressure linear flowmeter |
| CN105953848B (en) * | 2016-05-23 | 2019-07-05 | 西北工业大学 | A kind of linear flowmeter of differential pressure |
| CN107247156A (en) * | 2017-07-31 | 2017-10-13 | 长江大学 | A kind of flow rate measuring device and implementation based on pressure sensitive |
| CN107247156B (en) * | 2017-07-31 | 2023-09-12 | 长江大学 | Implementation method for flow velocity measurement based on pressure sensing |
| CN114113663A (en) * | 2021-11-24 | 2022-03-01 | 上海航天设备制造总厂有限公司 | Detection device for flow velocity measurement and flow field monitoring |
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Open date: 20080604 |