CN108444554A - The method and flowmeter of biphase gas and liquid flow are measured using electromagnetism vortex street principle - Google Patents
The method and flowmeter of biphase gas and liquid flow are measured using electromagnetism vortex street principle Download PDFInfo
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- CN108444554A CN108444554A CN201810168225.6A CN201810168225A CN108444554A CN 108444554 A CN108444554 A CN 108444554A CN 201810168225 A CN201810168225 A CN 201810168225A CN 108444554 A CN108444554 A CN 108444554A
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- flowmeter
- flow
- liquid flow
- vortex street
- biphase gas
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- 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
- G01F1/20—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 detection of dynamic effects of the flow
- G01F1/32—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 detection of dynamic effects of the flow using swirl flowmeters
-
- 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
- G01F1/56—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 electric or magnetic effects
- G01F1/58—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 electric or magnetic effects by electromagnetic flowmeters
- G01F1/586—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 electric or magnetic effects by electromagnetic flowmeters constructions of coils, magnetic circuits, accessories therefor
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
Abstract
The present invention provides a kind of method and flowmeter measuring biphase gas and liquid flow using electromagnetism vortex street principle, and this method is specially：A measurement pipe and a magnetic field are provided, the measurement pipe is placed in the magnetic field；One eddy generator is set in measurement pipe；An electromagnetic sensor and a converter are provided, the electromagnetic sensor receives signal and analyzed for acquiring flow signal, the converter.The method and flowmeter that biphase gas and liquid flow is measured using electromagnetism vortex street principle of the present invention is had the characteristics that in conjunction with electromagnetic induction and Karman vortex street principle：Biphase gas and liquid flow flow measurement suitable for liquid conduction；It is simple in structure, using single flowmeter, without traffic separator and other such as densitometer ancillary equipments.
Description
Technical field
The present invention relates to field of flow detection, and in particular to a kind of biphase gas and liquid flow flowmeter, more particularly to a kind of use
Electromagnetism vortex street principle measures the method and flowmeter of biphase gas and liquid flow.
Background technology
The measurement of fluid flow be widely used it is general, municipal water supply, metallurgy, petrochemical industry, medical industry, food industry,
Bioengineering etc., it is ubiquitous to the measurement of flow.With the acceleration of the modernization of industry, occurs gas-liquid two in many fields
Xiang Liu, such as the gasification unit of thermoelectricity, nuclear power, natural gas, the exploitation of oil, conveying, conveying of low-boiling point liquid etc..Gas-liquid two
Mutually stream flowmeter comes into being, and application is more and more wider.
Current flowmeter can only carry out the flow measurement of single-phase flow mostly, and the flow measurement of multiphase flow is normally applied separation
Method carries out, i.e., after two phase flow being first separated into single-phase flow using metering separator, then is measured using single-phase flow flowmeter, divides
It is bulky from device, heavy, it is expensive；The instrument for directly carrying out two-phase flow measurement, is generally aided with using radiation sources such as microwaves
The measurement of fluid density is carried out, and in relation to regulation to using radiation source to have stringent limitation.
Invention content
In view of the foregoing deficiencies of prior art, it is surveyed using electromagnetism vortex street principle the purpose of the present invention is to provide a kind of
The method and flowmeter for measuring biphase gas and liquid flow, for solving the problems, such as that flowmeter structure is complicated in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a kind of using electromagnetism vortex street principle measurement gas-liquid two
Mutually the method for stream, this method are specially：
A measurement pipe and a magnetic field are provided, the measurement pipe is placed in the magnetic field；
One eddy generator is set in measurement pipe；
An electromagnetic sensor and a converter are provided, the electromagnetic sensor is for acquiring flow signal, the converter
It receives signal and is analyzed.
Preferably, the eddy generator is the cylinder that a section is blunt form.
In order to achieve the above objects and other related objects, gas-liquid is measured using electromagnetism vortex street principle the present invention also provides a kind of
The flowmeter of two phase flow, including：
One measurement pipe and a magnetic field generation device for generating magnetic field, the measurement pipe are placed in the magnetic field；It is described
An eddy generator is provided in measurement pipe；
One electromagnetic sensor device, the electromagnetic sensor device are used to acquire flow signal,
One converter receives signal and is analyzed.
Preferably, the material of the measurement pipe is non-magnetic material.
Preferably, the electromagnetic sensor device includes axial arranged in two signal electrodes in measurement pipe.
Preferably, the flowmeter is connected to by ring flange on pipeline.
As described above, a kind of method and flowmeter measuring biphase gas and liquid flow using electromagnetism vortex street principle of the present invention, tool
There is following advantageous effect：
1, the present invention is suitable for the biphase gas and liquid flow flow measurement of liquid conduction；
2, the configuration of the present invention is simple is set using single flowmeter without traffic separator and other such as densitometer auxiliary
It is standby.
Description of the drawings
Fig. 1 is shown with the device that partition method carries out biphase gas and liquid flow flow measurement；
Fig. 2 is shown as directly measuring a wherein view for the device of biphase gas and liquid flow flow,
Fig. 3 is shown as directly measuring another view of the device of biphase gas and liquid flow flow；
Fig. 4, which is shown with electromagnetism vortex street principle and measures the flowmeter sensor structure of biphase gas and liquid flow, wherein one to be regarded
Figure；
Fig. 5 is shown with another view that electromagnetism vortex street principle measures the flowmeter sensor structure of biphase gas and liquid flow；
Fig. 6 is shown with the flowmeter scheme of installation that electromagnetism vortex street principle measures biphase gas and liquid flow.
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that the diagram provided in following embodiment only illustrates the basic structure of the present invention in a schematic way
Think, component count, shape and size when only display is with related component in the present invention rather than according to actual implementation in schema then
Draw, when actual implementation kenel, quantity and the ratio of each component can be a kind of random change, and its assembly layout kenel
It is likely more complexity.
Current flowmeter can only carry out the flow measurement of single-phase flow mostly, and the flow measurement of multiphase flow is generally using separation
Method carries out, i.e., after two phase flow being first separated into single-phase flow with metering separator, then is measured using single-phase flow flowmeter；Directly
The instrument for carrying out two-phase flow measurement generally uses the radiation sources such as microwave, and in relation to regulation to using radiation source to have stringent limitation.
No matter still using method measured directly using partition method, structure originally is all more complicated, especially divergence type.
The device of biphase gas and liquid flow flow measurement is carried out using partition method, as shown in Figure 1.Wherein, 1 is fluid line, and 2 are
Gas-liquid separator, 3 be gas flowmeter, and 4 be fluid flowmeter.
The device of biphase gas and liquid flow flow is directly measured, as shown in Figure 2,3.5 be venturimeter, and 6 be dual gamma
Gamma ray density meter, 7 be liquid, and 8 be gas, and 9 be mixer entrance, and 10 be mixer outlet, and 11 be gamma ray projector, and 12 be capacitance
Meter, 13 be scintiloscope, and 14 be flange.
By the way of partition method measurement, volume is too fat to move, complicated, expensive.Using gamma ray density meter plus flow
The mode directly measured is counted, structure is also complicated, and price is also expensive, and ray has radiation, use occasion limited.
Electromagnetic induction is the phenomenon that generating induced electromotive force due to magnetic flux change.The discovery of electromagnetic induction is electromagnetism
One of greatest achievement in field.It does not only disclose the inner link between electricity and magnetic, and is electricity and the phase between magnetic
Mutually experiment basis has been established in conversion, and obtaining huge and cheap electric energy for the mankind opens road, is of great importance in practical.
Electromagnetic flowmeter is exactly the flow measurement that conducting liquid is carried out using the principle of electromagnetic induction.Karman vortex street is weight in hydrodynamics
It the phenomenon that wanting, can often be encountered in nature, under certain condition, when fluid bypasses certain objects, object both sides can be periodically
Ground falls off, and direction of rotation is opposite, biserial line vortex of queueing discipline forms Karman vortex street after nonlinear interaction.Whirlpool
Cross frequence f is directly proportional to column effluent speed V, is inversely proportional with cylinder width d.Vortex-shedding meter is exactly the principle according to Karman vortex street
To carry out the flow measurement of gas or liquid.
General electromagnetic flowmeter or vortex-shedding meter can only measure single-phase flow, it is impossible to be used in biphase gas and liquid flow
Measurement.In recent decades, with the acceleration of the modernization of industry, there is biphase gas and liquid flow in many fields, such as thermoelectricity, core
The gasification unit of electricity, natural gas, the exploitation of oil, conveying, conveying of low-boiling point liquid etc..Biphase gas and liquid flow flowmeter is answered
With more and more extensive.
Embodiment one
Based on electromagnetic induction and Karman vortex street principle, gas-liquid two is measured using electromagnetism vortex street principle the present embodiment provides a kind of
The mutually method of stream, specially：
A measurement pipe and a magnetic field are provided, measurement pipe is placed in magnetic field；
One eddy generator is set in measurement pipe；
An electromagnetic sensor device and a converter are provided, electromagnetic sensor device is for acquiring flow signal, converter
It receives signal and is analyzed.
Measurement pipe is connected by flange with other pipelines, and fluid flows through measurement pipe, and the whirlpool acted in measurement pipe occurs
Body generates the frequency of whirlpool separation, and the cross frequence f of whirlpool is directly proportional to column effluent speed V, is inversely proportional with cylinder width d.Pass through
The cross frequence f for measuring whirlpool can measure fluid flow rate and instantaneous flow.Recycle the principle of electromagnetic induction by flow signal
Acquisition comes out.When measure there is gas to be mixed into liquid when, flow signal not only changes with the frequency that uninterrupted generates, can also be with
It void fraction size and generates signal-to-noise ratio variation.Two kinds of changing values of converter binding signal can analyze containing for gas in outflow
Amount.
In this present embodiment, in the flow signal of acquisition, frequency signal is the linear function of flow, signal-to-noise ratio it is big
It is small then proportional with the size of void fraction.
In this present embodiment, electromagnetic sensor device includes two signal electrodes, and signal electrode is arranged along the axis of measurement pipe,
It is located at vortex shedders one in front and one in back.
In this present embodiment, the eddy generator is triangle cylindrical body.
The biphase gas and liquid flow flowmeter is as common flow meters, including sensor and converter, sensor is generated and picked up
The number of winning the confidence, converter receive signal and analyzed, operation, output, display.The installation of entire instrument is simple, convenient, can be direct
It is installed by flange, without traffic separator and gamma ray density meter etc..
Embodiment two
As shown in figures 4-6, the present embodiment also provides a kind of flow measuring biphase gas and liquid flow using electromagnetism vortex street principle
Meter, including：
One measurement pipe 15 and one is used to generate the magnetic field generation device in magnetic field, and measurement pipe is placed in magnetic field；It is set in measurement pipe
It is equipped with an eddy generator 16；Eddy generator is triangle cylindrical body.
One electromagnetic sensor device, electromagnetic sensor device are used to acquire flow signal,
One converter receives signal and is analyzed.
Measurement pipe (non-magnetic material) is connected by flange with other pipelines, and fluid flows through measurement pipe, acts on measurement
Eddy generator in pipe generates the frequency of whirlpool separation, and the cross frequence f of whirlpool is directly proportional to column effluent speed V, wide with cylinder
Degree d is inversely proportional.Cross frequence f by measuring whirlpool can measure fluid flow rate and instantaneous flow.Recycle electromagnetic induction
Principle comes out flow signal acquisition.When measure there is gas to be mixed into liquid when, flow signal not only with uninterrupted generate
Frequency changes, and signal-to-noise ratio variation can be also generated with void fraction size.Two kinds of changing values of converter binding signal can be analyzed
The content of gas in outflow.In the flow signal of acquisition, frequency signal is the linear function of flow, the size of signal-to-noise ratio
It is then proportional with the size of void fraction.
In this example, electromagnetic sensor device includes axial arranged in two signal electrodes 17 in measurement pipe.
Magnetic field generation device can be one or more magnet exciting coils, and magnet exciting coil is arranged near two signal electrodes,
Two signal electrodes are wrapped in interior by the magnetic field that magnet exciting coil generates.Alternatively, the magnetic field generation device can be opposite sets
It is placed in the magnet steel of measurement pipe both sides.
In this example, flowmeter is connected to by ring flange on pipeline.
In conclusion the method and flowmeter that biphase gas and liquid flow is measured using electromagnetism vortex street principle of the present invention, in conjunction with electricity
Magnetic induction and Karman vortex street principle, have the characteristics that：Biphase gas and liquid flow flow measurement suitable for liquid conduction；Structure letter
It is single, using single flowmeter, without traffic separator and other such as densitometer ancillary equipments；Biphase gas and liquid flow can accurately be analyzed
Gas content in fluid, it is 0.1L/min that can survey minimum discharge gas in liquid；2.2m/s ± 0.5m/ must be avoided by measuring flow velocity
S flow velocity sections.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (6)
1. a kind of method measuring biphase gas and liquid flow using electromagnetism vortex street principle, which is characterized in that this method is specially：
A measurement pipe and a magnetic field are provided, the measurement pipe is placed in the magnetic field；
One eddy generator is set in measurement pipe；
An electromagnetic sensor and a converter are provided, the electromagnetic sensor is received for acquiring flow signal, the converter
Signal is simultaneously analyzed.
2. a kind of method measuring biphase gas and liquid flow using electromagnetism vortex street principle according to claim 1, it is characterised in that：
The eddy generator is the cylinder that a section is blunt form.
3. a kind of flowmeter measuring biphase gas and liquid flow using electromagnetism vortex street principle, which is characterized in that including：
One measurement pipe and a magnetic field generation device for generating magnetic field, the measurement pipe are placed in the magnetic field；The measurement
An eddy generator is provided in pipe；
One electromagnetic sensor device, the electromagnetic sensor device are used to acquire flow signal,
One converter receives signal and is analyzed.
4. a kind of flowmeter being measured biphase gas and liquid flow using electromagnetism vortex street principle according to claim 3, feature are existed
In the material of the measurement pipe is non-magnetic material.
5. a kind of flowmeter being measured biphase gas and liquid flow using electromagnetism vortex street principle according to claim 3, feature are existed
In the electromagnetic sensor device includes axial arranged in two signal electrodes in measurement pipe.
6. a kind of flowmeter being measured biphase gas and liquid flow using electromagnetism vortex street principle according to claim 3, feature are existed
In the flowmeter is connected to by ring flange on pipeline.
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| CN201810168225.6A CN108444554A (en) | 2018-02-28 | 2018-02-28 | The method and flowmeter of biphase gas and liquid flow are measured using electromagnetism vortex street principle |
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| CN201810168225.6A CN108444554A (en) | 2018-02-28 | 2018-02-28 | The method and flowmeter of biphase gas and liquid flow are measured using electromagnetism vortex street principle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932291A (en) * | 2019-01-29 | 2019-06-25 | 黑龙江科技大学 | A kind of electrostatic induction dust concentration detection device based on vortex street |
| CN114200160A (en) * | 2021-11-30 | 2022-03-18 | 哈尔滨工程大学 | Novel gas flow velocity and flow measurement system |
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| CN104729595A (en) * | 2015-02-12 | 2015-06-24 | 西安交通大学 | Intra-tube phase-separated-type two-phase fluid electromagnetic flow meter measuring device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932291A (en) * | 2019-01-29 | 2019-06-25 | 黑龙江科技大学 | A kind of electrostatic induction dust concentration detection device based on vortex street |
| CN114200160A (en) * | 2021-11-30 | 2022-03-18 | 哈尔滨工程大学 | Novel gas flow velocity and flow measurement system |
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Application publication date: 20180824 |