CN105841760A - Insert-type electromagnetic flowmeter - Google Patents
Insert-type electromagnetic flowmeter Download PDFInfo
- Publication number
- CN105841760A CN105841760A CN201610150363.2A CN201610150363A CN105841760A CN 105841760 A CN105841760 A CN 105841760A CN 201610150363 A CN201610150363 A CN 201610150363A CN 105841760 A CN105841760 A CN 105841760A
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- China
- Prior art keywords
- electrode
- measuring
- insert
- flow
- measure
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Classifications
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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
- G01F1/56—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
-
- 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
- G01F1/584—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 electrodes, accessories therefor
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention relates to an insert-type electromagnetic flowmeter comprising an insert-type flow sensor and a converter; the insert-type flow sensor comprises a detection head, an insert rod, a mount flange and a junction box; the detection head and the insert rod are respectively a cylindrical body; an excitation coil, an iron core, a lead wire and two pairs of electrodes contacting with fluid are arranged in a cylindrical cavity of the detection head; one end of the insert rod is connected with the junction box, and the other end is connected with the detection head; the mount flange is welded on the middle upper portion of the insert rod, and used for fixing and sealing the insert type flow sensor; the input terminal of the converter is connected with the output terminal of the wiring box. The insert-type electromagnetic flowmeter can serve as a calibration regulator so as to carry out online calibration for a filed large diameter flowmeter.
Description
Technical field
The present invention relates to a kind of inserted electromagnet flow meter for on-the-spot heavy caliber flowing meter on-line calibration and flow thereof
Measurement model.
Background technology
When at present on-the-spot heavy caliber flowing meter being carried out on-line calibration, generally use external-clamping type ultrasonic flowmeter as school
The standard scale Comparison Method of quasi-standard or electrical quantity method of inspection.But, above two method all can not well realize on-the-spot big
" online " calibration of bore effusion meter, has problems as follows: 1. due to the restriction of field condition, it is difficult to will be as calibration standard
The transducer of external-clamping type ultrasonic flowmeter measure at the scene to install on pipeline and put in place.Measure at the scene and outer clip is installed on pipeline
During the transducer of formula ultrasonic flowmeter, need the wall thickness to field pipes, outer perimeter etc. accurately to measure, then will measure
The parameter that obtains, measured medium type, measure pipe material and mounting means etc. interface is set by the parameter of ultrasonic flowmeter
Input, ultrasonic flowmeter draws the mounting distance of transducer according to the parameter of input.According to the transducer mounting distance obtained,
Measuring the installation site measuring and determining transducer on pipeline, transducer is being arranged on measurement pipeline simultaneously.Due to scene
It is difficult to ensure that measure parameter, (such as outer perimeter, on-the-spot general measurement pipeline is coated with certain thickness antirust paint to condition, and antirust
Paint thickness be difficult to determine, therefore be difficult to accurately measure pipeline outer perimeter) accuracy, cause in-site measurement to obtain and input
The parameter arranging interface to ultrasonic flowmeter parameter has deviation with actual, and then causes ultrasonic flowmeter according to these with real
Parameter devious calculated transducer mounting distance in border produces deviation with actual；It addition, measure also on pipeline measuring
When determining transducer installation site, the accuracy of probe installation location cannot be ensured equally, thus cause popping one's head in mounting distance again
Once produce deviation with reality.These installation deviation, it will the flow measurement to plug-in type ultrasonic flowmeter brings bigger
Uncertainty, affects the calibration result to on-the-spot heavy caliber flowing meter；2. according to the requirement of magnitude tracing repeatability, big to scene
During the calibration of bore effusion meter, calibration standard must have preferable measurement reproducibility, namely surpassing as calibration standard
Acoustic wave flow meter must have preferable measurement reproducibility.The key factor affecting ultrasonic flow rate measurement amount repeatability is to change
The installation of energy device, ultrasonic flowmeter to be ensured has preferable measurement reproducibility, it is necessary to assure transducer is installed to be had
Preferably repeatability, due to the restriction of field condition, it is impossible to ensures the installation repeatability of transducer, and then affects ultrasonic flow
The measurement reproducibility of meter；3. electrical quantity method of inspection is mainly by measuring the key of the on-the-spot heavy caliber flowing meter metering performance of impact
The method of parameter number checks effusion meter the most working properly, can only determine that whether normal flow meters work is, it is impossible to determine electricity ginseng
Number measures the functional relationship between flow measurements, therefore can not well realize the calibration of on-the-spot electromagnetic flowmeter.
Additionally, the measurement electrode of the inserted electromagnet flow meter under the conditions of prior art is generally single pair of, it is desirable to during installation
Must assure that measurement electrode pair is vertical with the flow direction of conducting liquid, effectively could be felt according to Faraday law of electromagnetic induction
Answer electromotive force: E=BVL, then obtain measuring conducting liquid in pipeline according to the relation between induction electromotive force, flow velocity and flow
Flow.If measuring electrode when mounted to flow to out of plumb to conducting liquid, i.e. creating and being not equal toAngle β,
Then measure the induction electromotive force obtained to become: E '=BVLsin β, comparison expression E=BVL and formula E '=BVLsin β it can be seen that by
In installing being not equal to of generationThe existence of angle β, cause E > E ', as long as namely measuring the flow direction of electrode pair and conducting liquid
Out of plumb, the induction electromotive force of generation will reduce.Induction electromotive force reduces will largely effect on inserted electromagnet flow meter
The effect of flow measurement, even cannot realize the measurement to flow.Under normal circumstances, due to the restriction of in-site installation condition, very
Difficult inserted electromagnet flow meter measured electrode to being installed to flow to vertical position, therefore prior art bar with conducting liquid
Inserted electromagnet flow meter under part also exists the defect that cannot overcome, it is impossible to meets well and carries out existing as calibration standard
The calibration of field heavy caliber flowing meter, therefore the inserted electromagnet flow meter under the conditions of prior art also cannot be as calibration standard
Realize standard scale Comparison Method and complete the calibration to on-the-spot heavy caliber flowing meter.
Owing to the inserted electromagnet flow meter under the conditions of external-clamping type ultrasonic flowmeter, prior art is as calibration standard
Standard scale Comparison Method or electrical quantity method of inspection there is above-mentioned many defects, the most all can not well realize on-the-spot heavy caliber
" online " calibration of effusion meter, is therefore badly in need of a kind of novel calibration standard for on-the-spot heavy caliber flowing meter on-line calibration
Substitute the inserted electromagnet flow meter under the conditions of current external-clamping type ultrasonic flowmeter, prior art as calibration standard
Standard scale Comparison Method or electrical quantity method of inspection.
Summary of the invention
It is an object of the invention to provide a kind of inserted electromagnet flow meter for on-the-spot heavy caliber flowing meter on-line calibration
And traffic measurement model carries out on-line calibration to on-the-spot heavy caliber flowing meter.
For achieving the above object, the technical solution used in the present invention is: the inserted electromagnet flow meter provided includes
Detection head, insertion rod, mounting flange, rosette, two pairs of electrodes to and transducer；Detect first end to be connected with insertion rod, separately
One end is symmetrically installed with the two measurement electrodes pair to contacting with fluid, and these two pair electrode pair is at grade；A pair electricity
The straight line that two electrodes of the straight line that centering two electrodes in pole determine and another pair of electrodes centering determine is mutually perpendicular to；One pair of electrodes
In two measurement electrodes between distances to measuring electrode centering, to obtain two distances measured between electrode equal with another.Inspection
Equipped with magnet exciting coil, iron core, lead-in wire in gauge head inner chamber.Insertion rod one end is connected with rosette, and the other end is connected with detection head
Connect；Mounting flange is welded on insertion rod middle and upper part.Transducer is connected with rosette by wire, by two to measuring electrode to product
Raw induced electromotive force signal is amplified, processes, and is converted into the flow velocity measuring pipe interior two to measuring at electrode pair location,
Further according to the relation of flow velocity Yu flow, obtain measuring the flow of conducting liquid in pipeline, and show.
The invention has the beneficial effects as follows: according to two to measure electrode pair arrangement, in conjunction with plug-in type formula in the present invention
The derivation of electromagnetic flowmeter traffic measurement model, it can be deduced that two to measuring electrode to producing the synthesis of electromotive force with measuring
The angle that electrode pair flows to be formed with conducting liquid is unrelated, namely two synthesize electromotive force and plug-in type to measuring electrode to producing
Electromagnetic flowmeter setting angle is unrelated.9. understanding in conjunction with formula, conducting liquid in pipeline is flowed by inserted electromagnet flow meter
The uninterrupted that measurement obtains is unrelated with the setting angle of inserted electromagnet flow meter.It is therefore seen that, this invention effectively solves
The defect that cannot overcome that inserted electromagnet flow meter under the conditions of prior art exists, can preferably realize plug-in type electricity
The magnetic flowmeter measurement to flow.
Accompanying drawing explanation
Fig. 1 is the structure chart of the inserted electromagnet flow meter of the present invention.
Fig. 2 is two structural plan to measuring electrode pair in inserted electromagnet flow meter of the present invention.
Fig. 3 is the two relation schematic diagram to measuring electrode pair and flow velocity direction in inserted electromagnet flow meter of the present invention.
Detailed description of the invention
The present invention will be further described with embodiment below in conjunction with the accompanying drawings.
The present invention by the inserted electromagnet flow meter under the conditions of external-clamping type ultrasonic flowmeter, prior art as school
The many limitation highlighted when the standard scale Comparison Method of quasi-standard or the on-the-spot heavy caliber flowing meter of electrical quantity method of inspection calibration
Analysis, and by the way of founding mathematical models, invented a kind of inserted electromagnet flow meter not affected by setting angle,
The on-line testing to on-the-spot heavy caliber flowing meter can be realized as calibration standard.
As it is shown in figure 1, the inserted electromagnet flow meter of the present invention includes detection 1, insertion rod 2, mounting flange 3, wiring
Box 4, measure electrode to 51, measure electrode to 52, transducer 6；Described detection 1 and insertion rod 2 are cylinder.Described inspection
Gauge head 1 one end is connected with insertion rod 2, and the other end is symmetrically installed with the two measurement electrodes to contacting with fluid and to 51 and measures electricity
Extremely to 52；Equipped with magnet exciting coil, iron core, lead-in wire in detection 1 inner chamber.Described insertion rod 2 one end is connected with rosette 4,
The other end is connected with detection 1；Described mounting flange 3 is welded on insertion rod 2 middle and upper part；As in figure 2 it is shown, described measurement
Electrode is installed at grade 52 with measuring electrode 51, by measuring straight line and the survey that two electrodes in 51 are determined by electrode
The straight line that two electrodes in 52 are determined by amount electrode is mutually perpendicular to, and measures electrode to two distances L measured between electrodes in 511
And measure electrode in 52 two distances L measured between electrodes2Equal, i.e. L1=L2；Described transducer passes through wire and connects
Line box is connected, and the induced electromotive force signal measuring electrode 51 with measure electrode to 51 generations are synthesized, amplify, processed,
It is converted into measurement pipe interior measurement electrode and to 51 and measures the electrode flow velocity to 51 positions, further according to the pass of flow velocity Yu flow
System, obtains measuring the flow of conducting liquid in pipeline, and shows.
As it is shown on figure 3, utilize the inserted electromagnet flow meter of invention that conducting liquid in measuring pipeline is carried out flow measurement
Time, if measuring the straight line that two electrodes in 51 determine by electrode is α with flow velocity angular separation, then measure electrode in 52 two
The straight line that electrode determines with direction of the traffic angle isModel is as follows:
Measuring electrode to the electromotive force that 51 produce is:
E1=BV1L1sinα ①
In formula, E1For measuring electrode to 51 electromotive force produced；B is magnetic field intensity；V1For measuring electrode to 51 position liquid
The flow velocity of body；L1For measuring electrode in 51 two distances measured between electrodes；α is true to two electrodes in 51 for measuring electrode
Fixed straight line and conducting liquid flow to the angle formed.
Straight due to measure that two electrodes in 52 determine by straight line that two electrodes in 51 determine by electrode and measurement electrode
Line is mutually perpendicular to, then measure electrode and to the electromotive force that 52 produce be:
In formula, E2For measuring electrode to 52 electromotive force produced；B is magnetic field intensity；V2For measuring electrode to 52 position liquid
The flow velocity of body；L2For measuring electrode in 52 two distances measured between electrodes.
To 51 and measure electrode to 52 installations at grade owing to measuring electrode, therefore measure electrode to 51 position liquid
The flow velocity V of body1With the measurement electrode flow velocity V to 52 position liquid2Equal, i.e. V1=V2。
Make L1=L2=L, V1=V2=V, then 2. 1. formula can become with formula:
E1=BVLsin α is 3.
Due toTherefore have
E2=BVLcos α is 5.
According to vector superposed principle, the inserted electromagnet flow meter of the present invention is measured electrode and to 51 and is measured electrode to 52 products
Raw synthesis electromotive force can be expressed as:
In formula, E is to measure electrode to 51 and to measure electrode to the 51 synthesis electromotive force produced.
6. 5. 4. formula is substituted into formula with formula, can obtain:
E=BVL is 7.
7. can be obtained by formula:
If inserted electromagnet flow meter is arranged on the pipeline that sectional area is S, then inserted electromagnet flow meter is to pipeline
Middle conducting liquid carries out the model of flow measurement:
In formula, Q is the flow of conducting liquid in pipeline；K is the instrument coefficient of inserted electromagnet flow meter.
9. formula carries out the model of flow measurement for inserted electromagnet flow meter to conducting liquid in pipeline.
According to formula 7., to 51 and measure the electrode arrangement to 52 in conjunction with measuring electrode, can obtain as drawn a conclusion: survey
Amount electrode to 51 and measure electrode produce 52 electromotive force synthesize with measure straight line that two electrodes in 51 determine by electrode and
The angle that conducting liquid flows to be formed is unrelated, namely 51 and measurement electrode to 52 generation synthesis electromotive force and are inserted by measurement electrode
Enter formula electromagnetic flowmeter setting angle unrelated.9. understanding in conjunction with formula, conducting liquid in pipeline is entered by inserted electromagnet flow meter
The uninterrupted that row flow measurement obtains is unrelated with the setting angle of inserted electromagnet flow meter.
The present invention efficiently solve that the inserted electromagnet flow meter under the conditions of prior art exists cannot overcome lack
Fall into, can preferably realize the inserted electromagnet flow meter measurement to flow.
Above-mentioned detailed description of the invention is used for illustrating the present invention rather than limiting the invention, the present invention's
In spirit and scope of the claims, any modifications and changes that the present invention is made, both fall within the protection model of the present invention
Enclose.
Claims (2)
1. an inserted electromagnet flow meter, it is characterised in that: include detecting head (1), insertion rod (2), mounting flange (3), connecing
Line box (4), measure electrode to (51), measure electrode to (52), transducer (6)；Described detection head (1) and insertion rod (2) are
Cylinder；Described detection head (1) one end is connected with insertion rod (2) one end, and the other end is symmetrically installed with and contacts with fluid
Measure electrode and to (51) and measure electrode to (52)；Equipped with magnet exciting coil, iron core, lead-in wire in detection head (1) inner chamber；Described inserts
Enter bar (2) other end to be connected with rosette (4)；Described mounting flange (3) is welded on insertion rod (2) middle and upper part；Transducer
(6) by being connected with rosette phase (4), to measuring electrode by two the induced electromotive force signal produced is amplified, processes, turn
Change the flow velocity measuring pipe interior two to measuring at electrode pair location into, further according to the relation of flow velocity Yu flow, obtain measuring pipe
The flow of conducting liquid in road, and show.
A kind of inserted electromagnet flow meter the most according to claim 1, it is characterised in that: described measurement electrode is to (51)
With measuring electrode, (52) are installed at grade；By measuring straight line that two electrodes in (51) determine by electrode and measuring electricity
The straight line extremely determined two electrodes in (52) is mutually perpendicular to；In (51) two are measured between electrode by described measurement electrode
Distance L1And measure electrode in (52) two distances L measured between electrode2Equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150363.2A CN105841760B (en) | 2016-03-16 | 2016-03-16 | A kind of inserted electromagnet flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150363.2A CN105841760B (en) | 2016-03-16 | 2016-03-16 | A kind of inserted electromagnet flow meter |
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| Publication Number | Publication Date |
|---|---|
| CN105841760A true CN105841760A (en) | 2016-08-10 |
| CN105841760B CN105841760B (en) | 2019-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610150363.2A Expired - Fee Related CN105841760B (en) | 2016-03-16 | 2016-03-16 | A kind of inserted electromagnet flow meter |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860442A (en) * | 2017-11-28 | 2018-03-30 | 苏州市计量测试研究所 | A kind of heavy caliber fluid flowmeter on-line calibration device |
| CN109253764A (en) * | 2018-10-26 | 2019-01-22 | 开封仪表有限公司 | Insertion type probe for electromagnetic flowmeter |
| CN111174840A (en) * | 2019-12-21 | 2020-05-19 | 江苏雷泰自动化仪表工程有限公司 | Novel plug-in electromagnetic flowmeter |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2202916Y (en) * | 1994-05-24 | 1995-07-05 | 田红良 | Transducer for plug type electromagnetic flowmeter |
| WO2006084061A2 (en) * | 2005-02-04 | 2006-08-10 | Entegris, Inc. | Magnetic flow meter with unibody construction and conductive polymer electrodes |
| CN101368834A (en) * | 2008-09-24 | 2009-02-18 | 上海大学 | Multi-electrode insertion type electromagnetic flowmeter sensor |
| CN201707079U (en) * | 2010-03-30 | 2011-01-12 | 山东泽谊自控技术有限公司 | Exquisite flowmeter |
| CN202974352U (en) * | 2012-12-12 | 2013-06-05 | 承德市本特思达仪表有限公司 | Plug-in type electromagnetic flowmeter |
| CN203132614U (en) * | 2013-03-19 | 2013-08-14 | 开封开流仪表有限公司 | Integrated plug-in battery powered electromagnetic flowmeter |
| CN104215285A (en) * | 2014-08-28 | 2014-12-17 | 昆山超强光电设备有限公司 | Electromagnetic flow meter |
| CN204421981U (en) * | 2015-02-04 | 2015-06-24 | 三正集团股份有限公司 | A kind of intrinsic safety type inserted electromagnet flow meter |
-
2016
- 2016-03-16 CN CN201610150363.2A patent/CN105841760B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2202916Y (en) * | 1994-05-24 | 1995-07-05 | 田红良 | Transducer for plug type electromagnetic flowmeter |
| WO2006084061A2 (en) * | 2005-02-04 | 2006-08-10 | Entegris, Inc. | Magnetic flow meter with unibody construction and conductive polymer electrodes |
| CN101368834A (en) * | 2008-09-24 | 2009-02-18 | 上海大学 | Multi-electrode insertion type electromagnetic flowmeter sensor |
| CN201707079U (en) * | 2010-03-30 | 2011-01-12 | 山东泽谊自控技术有限公司 | Exquisite flowmeter |
| CN202974352U (en) * | 2012-12-12 | 2013-06-05 | 承德市本特思达仪表有限公司 | Plug-in type electromagnetic flowmeter |
| CN203132614U (en) * | 2013-03-19 | 2013-08-14 | 开封开流仪表有限公司 | Integrated plug-in battery powered electromagnetic flowmeter |
| CN104215285A (en) * | 2014-08-28 | 2014-12-17 | 昆山超强光电设备有限公司 | Electromagnetic flow meter |
| CN204421981U (en) * | 2015-02-04 | 2015-06-24 | 三正集团股份有限公司 | A kind of intrinsic safety type inserted electromagnet flow meter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107860442A (en) * | 2017-11-28 | 2018-03-30 | 苏州市计量测试研究所 | A kind of heavy caliber fluid flowmeter on-line calibration device |
| CN109253764A (en) * | 2018-10-26 | 2019-01-22 | 开封仪表有限公司 | Insertion type probe for electromagnetic flowmeter |
| CN111174840A (en) * | 2019-12-21 | 2020-05-19 | 江苏雷泰自动化仪表工程有限公司 | Novel plug-in electromagnetic flowmeter |
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| Publication number | Publication date |
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| CN105841760B (en) | 2019-05-24 |
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