CN108548573A - Differential pressure flowmeter - Google Patents
Differential pressure flowmeter Download PDFInfo
- Publication number
- CN108548573A CN108548573A CN201810420864.7A CN201810420864A CN108548573A CN 108548573 A CN108548573 A CN 108548573A CN 201810420864 A CN201810420864 A CN 201810420864A CN 108548573 A CN108548573 A CN 108548573A
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- China
- Prior art keywords
- probe
- pipeline
- flexible sheet
- pressure
- differential pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000523 sample Substances 0.000 claims abstract description 76
- 239000012530 fluid Substances 0.000 claims abstract description 40
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
Abstract
Differential pressure flowmeter, including measuring pipeline, pressure sensor, flexible sheet and probe, described measure is provided with groove on pipeline position symmetrical above and below, flexible sheet is installed in the inside grooves both sides vertical with flow direction, flexible sheet is used to be converted to the lateral pressure of probe the deformation of flexible sheet, flexible sheet is located at the one side measured in pipeline and is connect with probe, and pressure sensor is installed in the another side of flexible sheet.By measuring a piece probe vertical with fluid velocity direction of installation in pipeline, when fluid flows through probe, fluid can generate probe the pressure difference perpendicular to probe surface, the size of pressure difference and the property of fluid（Density etc.）There is exact numerical relation with the speed of fluid, uninterrupted can be calculated in conjunction with the property of fluid and the geometry of pipeline by measuring this pressure difference by the pressure sensor at probe both ends.The present invention has the features such as smaller to the pressure loss of fluid, to reduce the consumption of additional energy source.
Description
Technical field
The present invention relates to a kind of differential pressure flowmeters.
Background technology
Flow is the Fluid Volume that cross-section of pipeline is flowed through in the unit interval, commonly uses mass flow or volume flow indicates.With
The raising for present-day procedure the degree of automation, the requirement to flow measurement also improve therewith, but due to industrial production mistake
The diversity of environment and the complexity of flow measurement in journey, the selection of flowmeter need to consider range, the pressure loss, stream
The factors such as the property of body.
Flowmeter is widely used in the works such as oil, natural gas, chemical industry, metallurgy, electric power, papermaking, town gas, machinery, shipbuilding
Industry field.
Existing differential pressure flowmeter in pipeline by installing throttling set, when fluid passes through throttling set, according to
Bernoulli principle, can before and after throttling set generation differential pressure, flow is directly proportional to the square root of differential pressure, measure this differential pressure and
The size of flow can be calculated in conjunction with the geometric dimension of known fluid condition and throttling set and pipeline, and because in pipeline
It is mounted with throttling set, so the pressure loss of fluids within pipes is larger, consumes the additional energy.
Invention content
The technical problem to be solved by the present invention is to overcome drawbacks described above of the existing technology, provide in a kind of pipeline
The small differential pressure flowmeter of the pressure loss of fluid.
The technical solution adopted by the present invention to solve the technical problems is：Differential pressure flowmeter, including measure pipeline, pressure
Sensor, flexible sheet and probe, described measure is provided with groove on pipeline position symmetrical above and below, in inside grooves and fluid side
Flexible sheet is installed to vertical both sides, flexible sheet is used to be converted to the lateral pressure of probe the deformation of flexible sheet, bullet
Property diaphragm be located at measure pipeline in one side connect with probe, flexible sheet another side installation pressure sensor.
Further, flexible sheet is located at the one side measured in pipeline and is connect by welding with probe.
Further, it is 45-55mm that the measurement pipeline, which is one section of length identical with tested pipeline internal diameter,（It is preferred that 50mm）
Or the pipeline of other numerical values reciteds, it measures pipeline and is mounted on tested pipeline by flange or other mounting means.
Further, the shape of the probe passes through special designing, and whole presentation is streamlined, and the boss at the both ends of probe passes through
The mode of welding is connect with flexible sheet, and flexible sheet is fixed on the inside for the groove for measuring pipeline, when fluid flows through probe,
Lateral displacement can occur for probe.
Further, when lateral displacement occurs for probe, pressure sensor can measure the pressure difference of probe both sides, this pressure
The flow velocity of difference and fluids within pipes is the numerical relation of determination.
The present invention installs pressure and passes by installing a probe vertical with fluid velocity direction, probe both ends in pipeline
Sensor, when fluid flows through probe, due to the distinctive appearance of probe, fluid can generate probe one perpendicular to probe surface
Pressure difference, the lift being similar on aircraft wing, the size of pressure difference and the property of fluid（Density etc.）Have with the speed of fluid
Exact numerical relation measures this pressure in conjunction with the property of fluid and the geometry knot of pipeline by the pressure sensor at probe both ends
Structure can calculate uninterrupted.
The present invention replaces throttling set with probe, since the shape of probe is streamlined, and small volume, so convection current
The pressure loss of body is smaller.
Description of the drawings
Fig. 1 is the overall structure diagram of the embodiment of the present invention；
Fig. 2 is the left view of embodiment illustrated in fig. 1；
Fig. 3 is the vertical view of embodiment illustrated in fig. 1；
Fig. 4 is probe and pressure sensor mounting means enlarged diagram in the portions C-measurement pipeline of embodiment illustrated in fig. 1；
Fig. 5 is the front view of the probe of embodiment illustrated in fig. 1；
Fig. 6 is the left view of the probe of embodiment illustrated in fig. 1；
Fig. 7 is the vertical view of the probe of embodiment illustrated in fig. 1；
Fig. 8 is the enlarged diagram of the shape of the probe of embodiment illustrated in fig. 1.
Specific implementation mode
Below in conjunction with drawings and examples, the invention will be further described.
- Fig. 4 referring to Fig.1, the present embodiment include measuring pipeline 1, pressure sensor 2, flexible sheet 3 and probe 4, the survey
Buret road 1 is provided with groove on position symmetrical above and below, and flexible sheet 3 is installed in the inside grooves both sides vertical with flow direction,
Flexible sheet 3 is used to be converted to the lateral pressure of probe 4 deformation of flexible sheet 3, and flexible sheet 3, which is located at, to be measured in pipeline 1
One side connect by welding with probe 4, flexible sheet 3 another side install pressure sensor 2.
In the present embodiment, the boss at probe both ends is welded on the flexible sheet measured in plumbing chase using the mode of welding
Inside, the outside of flexible sheet installs pressure sensor, as shown in Fig. 2, probe is internally hollow, hollow volume root
It is designed according to the density of fluid, ensures that probe under the buoyancy of fluid, suspends in a fluid, not to the elastic membrane at both ends
Piece generates the pulling force on vertical direction.
With reference to Fig. 5~Fig. 8, the contour structures of the probe pass through special designing, and whole presentation is streamlined, when fluid flows through
When probe, according to bernoulli principle, two side liquids of probe can generate probe one pressure difference perpendicular to probe surface.It visits
The size of stick pressure at both sides difference is,CFor discharge coefficient,For the density of fluid,For the stream of fluid
Speed,SFor probe area.It is installed on the similar performance of four pressure sensors at probe both ends, when ambient temperature changes, four
The temperature drift of pressure sensor is close, to reduce the temperature drift of flowmeter.When fluid inside pipeline remains static, stream
Pressure of the static pressure of body to the pressure sensor of probe side and the pressure size equal direction phase to another side pressure sensor
Instead, the pressure difference of probe both sides is equal to zero.When fluid inside pipeline flows, under the action of pressure at both sides difference side occurs for probe
To when displacement, probe applies pulling force to the flexible sheet of top and bottom two positioned at probe the same side, and to the probe other side
Top and bottom two flexible sheets apply pressure, be installed on the pressure sensor on the outside of flexible sheet this deformation work
Corresponding resistance variations will be generated under, the changing value of resistance be measured using corresponding measuring circuit, you can measure probe
The pressure difference of both sides can also measure the flow velocity of fluid, and the stream of fluids within pipes can be obtained in conjunction with the geometric parameter of pipeline
Measure size.The calculation formula of flow is as follows：
Formula 1
Formula 2
Formula 3
In formulaFor the pressure difference of probe both sides,、、、For the measured value of four sensors,C
It is related with installation with detected fluid property, the construction profile of probe for discharge coefficient, it is measured by experiment,For the close of fluid
Degree,SIt is probe surface in the projected area on flow direction, C,、SIt is known quantity after the completion of flowmeter design,
For the flow velocity of fluid,QFor the flow in unit time flow piping section,DTo measure the diameter of pipeline.
A kind of preferred embodiment of the present invention is discussed in detail above.The specific implementation mode is only used
Understand core of the invention thought in help.It should be pointed out that those of ordinary skill in the art, not departing from this hair
, can be with several improvements and modifications are made to the present invention under the premise of bright principle, these improvement and modification also belong to power of the present invention
The protection domain that profit requires.
Claims (10)
1. differential pressure flowmeter, it is characterised in that：Including measuring pipeline, pressure sensor, flexible sheet and probe, the measurement
Pipeline is provided with groove on position symmetrical above and below, and flexible sheet, elasticity are installed in the inside grooves both sides vertical with flow direction
Diaphragm is used to be converted to the lateral pressure of probe the deformation of flexible sheet, and flexible sheet is located at one side and the spy measured in pipeline
Stick connects, and pressure sensor is installed in the another side of flexible sheet.
2. differential pressure flowmeter according to claim 1, it is characterised in that：Flexible sheet is located at the one side measured in pipeline
It is connect by welding with probe.
3. differential pressure flowmeter according to claim 1 or 2, it is characterised in that：The measurement pipeline is one section and is tested
The identical length of internal diameter of the pipeline is the pipeline of 45-55mm, measures pipeline and is mounted on tested pipeline by flange.
4. differential pressure flowmeter according to claim 3, it is characterised in that：The measurement pipeline is one section and tested pipeline
The identical length of internal diameter is the pipeline of 50mm.
5. differential pressure flowmeter according to claim 1 or 2, it is characterised in that：Stream is integrally presented in the shape of the probe
The boss of line style, the both ends of probe is connect with flexible sheet by welding, and flexible sheet, which is fixed on, measures the recessed of pipeline
The inside of slot, when fluid flows through probe, lateral displacement can occur for probe.
6. differential pressure flowmeter according to claim 3, it is characterised in that：Streamline is integrally presented in the shape of the probe
The boss of type, the both ends of probe is connect with flexible sheet by welding, and flexible sheet is fixed on the groove for measuring pipeline
Inside, when fluid flows through probe, lateral displacement can occur for probe.
7. differential pressure flowmeter according to claim 4, it is characterised in that：Streamline is integrally presented in the shape of the probe
The boss of type, the both ends of probe is connect with flexible sheet by welding, and flexible sheet is fixed on the groove for measuring pipeline
Inside, when fluid flows through probe, lateral displacement can occur for probe.
8. differential pressure flowmeter according to claim 5, it is characterised in that：When lateral displacement occurs for probe, pressure passes
Sensor can measure the pressure difference of probe both sides, and the flow velocity of this pressure difference and fluids within pipes is the numerical relation of determination.
9. differential pressure flowmeter according to claim 6, it is characterised in that：When lateral displacement occurs for probe, pressure passes
Sensor can measure the pressure difference of probe both sides, and the flow velocity of this pressure difference and fluids within pipes is the numerical relation of determination.
10. differential pressure flowmeter according to claim 7, it is characterised in that：When lateral displacement occurs for probe, pressure passes
Sensor can measure the pressure difference of probe both sides, and the flow velocity of this pressure difference and fluids within pipes is the numerical relation of determination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810420864.7A CN108548573B (en) | 2018-05-04 | 2018-05-04 | Differential pressure flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810420864.7A CN108548573B (en) | 2018-05-04 | 2018-05-04 | Differential pressure flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108548573A true CN108548573A (en) | 2018-09-18 |
| CN108548573B CN108548573B (en) | 2024-03-08 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810420864.7A Active CN108548573B (en) | 2018-05-04 | 2018-05-04 | Differential pressure flowmeter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631647A (en) * | 2019-08-19 | 2019-12-31 | 吉林大学 | Bionic micro-flow sensor and detection method thereof |
| CN112890703A (en) * | 2021-01-14 | 2021-06-04 | 深圳拓邦股份有限公司 | Water quantity control method and device for floor washing machine, floor washing machine and readable storage medium |
| CN113983224A (en) * | 2021-10-12 | 2022-01-28 | 康赛特自动化集团有限公司 | Electric actuator device for Internet of things and use method thereof |
| CN114280326A (en) * | 2021-12-23 | 2022-04-05 | 广西大学 | Karst depression waterlogging water falling hole flow velocity measuring device and overflowing capacity monitoring method |
| CN115371752A (en) * | 2022-08-08 | 2022-11-22 | 重庆川仪自动化股份有限公司 | Pipeline type thermal gas mass flowmeter |
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| WO2000066979A1 (en) * | 1999-05-05 | 2000-11-09 | Venture Measurement Company, Llc | Force-sensing mass flow meter |
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| CN101629836A (en) * | 2009-08-17 | 2010-01-20 | 昆明理工大学 | Target type fiber grating liquid flowmeter |
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| CN107588813A (en) * | 2017-08-26 | 2018-01-16 | 上海曼斐电器贸易有限公司 | A kind of target type meter |
| CN208140195U (en) * | 2018-05-04 | 2018-11-23 | 湖南菲尔斯特传感器有限公司 | A kind of differential pressure flowmeter |
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2018
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|---|---|---|---|---|
| SU445835A1 (en) * | 1972-09-06 | 1974-10-05 | Предприятие П/Я Г-4725 | Flow sensor |
| JPS5447673A (en) * | 1977-08-30 | 1979-04-14 | Siemens Ag | Device of measuring minute displacement |
| CN2103121U (en) * | 1990-12-24 | 1992-04-29 | 徐孟飚 | Equalizing speed flowmeter |
| CN1078305A (en) * | 1992-12-12 | 1993-11-10 | 通辽发电总厂 | Twin fulcrum target type flow sensor |
| JPH10142018A (en) * | 1996-11-08 | 1998-05-29 | Yokogawa Electric Corp | Vortex flowmeter |
| WO2000066979A1 (en) * | 1999-05-05 | 2000-11-09 | Venture Measurement Company, Llc | Force-sensing mass flow meter |
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| CN101629836A (en) * | 2009-08-17 | 2010-01-20 | 昆明理工大学 | Target type fiber grating liquid flowmeter |
| FR3025602A1 (en) * | 2014-09-08 | 2016-03-11 | Turbomeca | HYDRAULIC COUPLER |
| CN204831390U (en) * | 2015-05-13 | 2015-12-02 | 厦门均溪自控有限公司 | High temperature resistant target flowmeter |
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| CN106872094A (en) * | 2015-12-11 | 2017-06-20 | 辉固科技有限公司 | Pressure sensor and the sensing system including one or more pressure sensors |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631647A (en) * | 2019-08-19 | 2019-12-31 | 吉林大学 | Bionic micro-flow sensor and detection method thereof |
| CN112890703A (en) * | 2021-01-14 | 2021-06-04 | 深圳拓邦股份有限公司 | Water quantity control method and device for floor washing machine, floor washing machine and readable storage medium |
| CN113983224A (en) * | 2021-10-12 | 2022-01-28 | 康赛特自动化集团有限公司 | Electric actuator device for Internet of things and use method thereof |
| CN114280326A (en) * | 2021-12-23 | 2022-04-05 | 广西大学 | Karst depression waterlogging water falling hole flow velocity measuring device and overflowing capacity monitoring method |
| CN114280326B (en) * | 2021-12-23 | 2023-08-25 | 广西大学 | Karst depression waterlogging water falling hole flow velocity measuring device and overflow capacity monitoring method |
| CN115371752A (en) * | 2022-08-08 | 2022-11-22 | 重庆川仪自动化股份有限公司 | Pipeline type thermal gas mass flowmeter |
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| Publication number | Publication date |
|---|---|
| CN108548573B (en) | 2024-03-08 |
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| CB02 | Change of applicant information |
Address after: 410011 floor 4, building 1, zhiyuanyuan, Zhenhua Road, Yuhua District, Changsha City, Hunan Province Applicant after: FIRSTRATE SENSOR CO.,LTD. Address before: 410000 F building, 18 Electrolux Avenue, Changsha, Hunan, China. Applicant before: FIRSTRATE SENSOR CO.,LTD. |
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