CN208140195U - A kind of differential pressure flowmeter - Google Patents
A kind of differential pressure flowmeter Download PDFInfo
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- CN208140195U CN208140195U CN201820659331.XU CN201820659331U CN208140195U CN 208140195 U CN208140195 U CN 208140195U CN 201820659331 U CN201820659331 U CN 201820659331U CN 208140195 U CN208140195 U CN 208140195U
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Abstract
A kind of differential pressure flowmeter, including measurement pipeline, pressure sensor, flexible sheet and probe, the measurement pipeline is provided with groove on position symmetrical above and below, flexible sheet is installed in the inside grooves two sides vertical with flow direction, flexible sheet is used to be converted to the lateral pressure of probe the deformation of flexible sheet, the one side that flexible sheet is located in measurement pipeline is connect with probe, installs pressure sensor in the another side of flexible sheet.By installing a probe vertical with fluid velocity direction in measurement pipeline, when fluid flows through probe, fluid can generate the pressure difference perpendicular to probe surface, the size of pressure difference and the property of fluid to probe（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 utility model has the features such as smaller to the pressure loss of fluid, to reduce the consumption of additional energy source.
Description
Technical field
The utility model relates to a kind of differential pressure flowmeters.
Background technique
Flow is the Fluid Volume that cross-section of pipeline is flowed through in the unit time, and commonly using mass flow or volume flow indicates.With
The raising of present-day procedure the degree of automation, the requirement to flow measurement also increase accordingly, but due to industrial production mistake
The diversity of environment and the complexity of flow measurement, the selection of flowmeter need to comprehensively consider range, the pressure loss, stream in journey
The factors such as the property of body.
Flowmeter is widely used in the works such as petroleum, 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 generate 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.
Utility model content
Technical problem to be solved in the utility model is to overcome drawbacks described above of the existing technology, provides a kind of pipe
The small differential pressure flowmeter of the pressure loss of fluid in road.
Technical solution adopted by the utility model to solve its technical problems is：A kind of differential pressure flowmeter, including measurement
Pipeline, pressure sensor, flexible sheet and probe, the measurement pipeline is provided with groove on position symmetrical above and below, in groove
Flexible sheet is installed the two sides vertical with flow direction in portion, and flexible sheet is used to the lateral pressure of probe being converted to flexible sheet
Deformation, flexible sheet be located at measurement pipeline in one side connect with probe, flexible sheet another side installation pressure sensing
Device.
Further, the one side that flexible sheet is located in measurement pipeline 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, measurement pipeline are 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 of the groove of measurement pipeline, when fluid flows through probe,
Lateral displacement can occur for probe.
Further, when lateral displacement occurs for probe, pressure sensor can be measured the pressure difference of probe two sides, this pressure
The flow velocity of difference and fluids within pipes is determining numerical relation.
The utility model in pipeline by installing a probe vertical with fluid velocity direction, probe both ends installation pressure
Force snesor, when fluid flows through probe, due to the distinctive appearance of probe, fluid can generate one perpendicular to probe table to probe
The pressure difference in face, similar to the lift on aircraft wing, the size of pressure difference and the property of fluid（Density etc.）With the speed of fluid
Degree have exact numerical relation, by the pressure sensor at probe both ends measure this pressure in conjunction with fluid property and pipeline it is several
What structure can calculate uninterrupted.
The utility model replaces throttling set with probe, since the shape of probe is streamlined, and small volume, so
It is smaller to the pressure loss of fluid.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model embodiment；
Fig. 2 is the left view of embodiment illustrated in fig. 1；
Fig. 3 is the top view of embodiment illustrated in fig. 1；
Fig. 4 is that probe and the amplification of pressure sensor mounting means are illustrated in the portion C-measurement pipeline of embodiment illustrated in fig. 1
Figure；
Fig. 5 is the main 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 top 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 embodiment
Below in conjunction with drawings and examples, the utility model is described in further detail.
- Fig. 4 referring to Fig.1, the present embodiment include measurement 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, installs flexible sheet 3 in the inside grooves two 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 is located in measurement 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 in measurement 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, guarantees 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.
Referring 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 a pressure difference perpendicular to probe surface to probe.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 variation, 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 two 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 for being located 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 in the work of this deformation
Corresponding resistance variations will be generated under, the changing value of resistance is measured using corresponding measuring circuit, can measure probe
The pressure difference of two sides also just can be measured 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 two sides,、、、For the measurement of four sensors
Value,CIt is related with installation for discharge coefficient, and detected fluid property, the construction profile of probe, it is measured by test,For fluid
Density,SIt is probe surface perpendicular to the projected area on flow direction, C,、SIt is known after the completion of flowmeter design
Amount,For the flow velocity of fluid,QFor the flow in unit time flow piping section,DFor the diameter for measuring pipeline.
A kind of preferred embodiment of the utility model is discussed in detail above.The specific embodiment is only
It is the core concept for being used to help understand the utility model.It should be pointed out that those of ordinary skill in the art, not
Under the premise of being detached from the utility model principle, several improvements and modifications can be made to this utility model, these improve and repair
Decorations also belong to the protection scope of the utility model claims.
Claims (10)
1. a kind of differential pressure flowmeter, it is characterised in that：It is described including measurement pipeline, pressure sensor, flexible sheet and probe
Measurement pipeline is provided with groove on position symmetrical above and below, installs flexible sheet in the inside grooves two sides vertical with flow direction,
Flexible sheet is used to be converted to the lateral pressure of probe the deformation of flexible sheet, and flexible sheet is located at the one side in measurement pipeline
It is connect with probe, 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 in measurement 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, and measurement pipeline 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 is fixed on the recessed of measurement 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 of measurement 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 of measurement 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 is passed
Sensor can be measured the pressure difference of probe two sides, and the flow velocity of this pressure difference and fluids within pipes is determining numerical relation.
9. differential pressure flowmeter according to claim 6, it is characterised in that：When lateral displacement occurs for probe, pressure is passed
Sensor can be measured the pressure difference of probe two sides, and the flow velocity of this pressure difference and fluids within pipes is determining numerical relation.
10. differential pressure flowmeter according to claim 7, it is characterised in that：When lateral displacement occurs for probe, pressure is passed
Sensor can be measured the pressure difference of probe two sides, and the flow velocity of this pressure difference and fluids within pipes is determining numerical relation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820659331.XU CN208140195U (en) | 2018-05-04 | 2018-05-04 | A kind of differential pressure flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820659331.XU CN208140195U (en) | 2018-05-04 | 2018-05-04 | A kind of differential pressure flowmeter |
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| Publication Number | Publication Date |
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| CN208140195U true CN208140195U (en) | 2018-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820659331.XU Active CN208140195U (en) | 2018-05-04 | 2018-05-04 | A kind of differential pressure flowmeter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548573A (en) * | 2018-05-04 | 2018-09-18 | 湖南菲尔斯特传感器有限公司 | Differential pressure flowmeter |
| CN111024170A (en) * | 2019-12-18 | 2020-04-17 | 沈阳鼓风机集团股份有限公司 | Orifice flowmeter |
| 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 |
-
2018
- 2018-05-04 CN CN201820659331.XU patent/CN208140195U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108548573A (en) * | 2018-05-04 | 2018-09-18 | 湖南菲尔斯特传感器有限公司 | Differential pressure flowmeter |
| CN108548573B (en) * | 2018-05-04 | 2024-03-08 | 湖南菲尔斯特传感器有限公司 | Differential pressure flowmeter |
| CN111024170A (en) * | 2019-12-18 | 2020-04-17 | 沈阳鼓风机集团股份有限公司 | Orifice flowmeter |
| CN111024170B (en) * | 2019-12-18 | 2021-09-14 | 沈阳鼓风机集团股份有限公司 | Orifice flowmeter |
| 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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