CN206959954U - A kind of online contrastive test device of ultrasonic flow and flow quantity detecting system - Google Patents
A kind of online contrastive test device of ultrasonic flow and flow quantity detecting system Download PDFInfo
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- CN206959954U CN206959954U CN201720315026.4U CN201720315026U CN206959954U CN 206959954 U CN206959954 U CN 206959954U CN 201720315026 U CN201720315026 U CN 201720315026U CN 206959954 U CN206959954 U CN 206959954U
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Abstract
The utility model belongs to flow detection technical field, discloses a kind of online contrastive test device of ultrasonic flow, the fixed flowmeter being fixed on for testing verification on fluid circuit；Including：Ultrasonic flowmeter, signal isolation unit and flow integrator；The ultrasonic flowmeter is connected by the signal isolation unit with the flow integrator；When performing test verification, the ultrasonic flowmeter is arranged on the fluid circuit, positioned at the fixed flowmeter side.The utility model provides a kind of online contrastive test device of ultrasonic flow for being used to lift corrective maintenance efficiency.
Description
Technical field
Flow detection technical field is the utility model is related to, more particularly to a kind of online contrastive test device of ultrasonic flow
And flow quantity detecting system.
Background technology
In iron and steel enterprise, due to being continuous synthetic job, each production link all too busy to get away water, especially our company
Powering region, is responsible for the water supply of each process system of production link such as blast furnace, steel-making, steel rolling, and comprising industry water, recycle-water,
The different qualities such as demineralized water, water consumption is big, is set using a variety of meterings such as ultrasonic flowmeter, electromagnetic flowmeter, vortex-shedding meter
Standby, big using caliber section, minimum DN 50, maximum DN700, dynamic work portion fluid flowmeter amount to more than 300 platforms, carry out water
Development of the measurement of resource to clearing, technique productions and enterprise between company's trade settlement and factory border has important meaning
Justice.
It is significant to carry out development of the measurement of water resource to enterprise.But because continuously can not in
The requirement of disconnected operation property tends not to realize and water ga(u)ge dismantled censorship, can not realize each flowmeter all plus
Equipment is by the use of flowmeter as with reference to comparison.These traditional methods not only influence normal production, increase additional workload, return enterprise
Industry adds financial burden and promotes enterprise to solve the ageing and economy of this problem raising enterprises water-carrying capacity meterings
Effective management of industry water balance improves production capacity, reduced from stopping production, the underproduction influence that instrument calibration is brought on the one hand is avoided
Metage use；On the other hand timely and effectively service data is provided for the modern management of enterprise, by portable instrument
Calibration of tracing to the source, ensure portable instrument accuracy in itself, recycle it to compare as calibrator other flowmeters online
It is right, iron and steel enterprise's large sized water pipeline road is balanced, leakage detection and management it is significant.The measuring management carried out for company
The metering room of water-carrying capacity is every confirming to provide effective foundation in system, and equipment is reached the purpose of controlled management.
Under ideal conditions, its error can reach 1.0% to outer clip portable type ultrasonic flowmeter, it is contemplated that field pipes
The uncertain factor of parameter, the degree of accuracy of in-site measurement can reach 1.5% substantially.So, using outer clip portable ultraphonic wave current
It is more feasible method that gauge, which carries out flowmeter on-line checking,.If ultrasonic flowmeter exists with online flow instrument error
Within ± 2.0%, so that it may which the precision for thinking online instrument is acceptable.If it is out of this range, it is considered as online instrument
Table, there is certain deviation.Just need to be modified in-line meter.
Utility model content
The utility model provides a kind of online contrastive test device of ultrasonic flow and flow quantity detecting system, solves existing skill
The test verification operation for the fixed flowmeter being fixed in art on fluid circuit is complicated, and efficiency is low, influences pipeline work effect
The technical problem of rate.
In order to solve the above technical problems, the utility model provides a kind of online contrastive test device of ultrasonic flow, use
The fixed flowmeter being fixed in test verification on fluid circuit；Including：Ultrasonic flowmeter, signal isolation unit and stream
Measure integrating instrument；
The ultrasonic flowmeter is connected by the signal isolation unit with the flow integrator；
When performing test verification, the ultrasonic flowmeter is arranged on the fluid circuit, positioned at described fixed
Flowmeter side.
Further, when the diameter of the fluid circuit is less than or equal to 600mm, the probe of the ultrasonic flowmeter is adopted
Installed with V methods；
When the diameter of the fluid circuit is more than 600mm, the probe of the ultrasonic flowmeter is installed using Z methods.
Further, the signal isolation unit includes：Current modulating circuit, isolation change-over circuit and demodulator circuit；
The output end of the ultrasonic flowmeter is connected with the input of the current modulating circuit；
The output end of the current modulating circuit is connected by the isolation change-over circuit with the demodulator circuit；
The output end of the demodulator circuit is connected with the flow integrator.
A kind of flow quantity detecting system, including：The fixed online contrastive test device of flowmeter and ultrasonic flow；
The fixed flowmeter is arranged on fluid circuit；
The online contrastive test device of ultrasonic flow includes：Ultrasonic flowmeter, signal isolation unit and flow
Integrating instrument；
The ultrasonic flowmeter is connected by the signal isolation unit with the flow integrator；
When performing test verification, the ultrasonic flowmeter is arranged on the fluid circuit, positioned at described fixed
Flowmeter side.
Further, when the diameter of the fluid circuit is less than or equal to 600mm, the probe of the ultrasonic flowmeter is adopted
Installed with V methods；
When the diameter of the fluid circuit is more than 600mm, the probe of the ultrasonic flowmeter is installed using Z methods.
Further, the signal isolation unit includes：Current modulating circuit, isolation change-over circuit and demodulator circuit；
The output end of the ultrasonic flowmeter is connected with the input of the current modulating circuit；
The output end of the current modulating circuit is connected by the isolation change-over circuit with the demodulator circuit；
The output end of the demodulator circuit is connected with the flow integrator.
The one or more technical schemes provided in the embodiment of the present application, have at least the following technical effects or advantages：
The online contrastive test device of ultrasonic flow provided in the embodiment of the present application, the online fixed flow of contrastive test
Meter, realize the online contrastive test verification of fixed flowmeter；It is defeated to iron and steel enterprise's kinds of processes system, the size of multiple-quality water
Water lines are balanced, leakage detection and raising measurement instrument metrological confirmation efficiency are significant；Have for iron and steel enterprise and connect
The characteristics of continuous operation, the problem of the off-line calibration after wire mounting flowmeter can not be dismantled according to the re-testing periods is efficiently solved,
Avoiding stopping production, the underproduction that instrument calibration is brought influences, and improves production capacity, reduces metage use, economy and ageing spy
It is unobvious；To the metering room of water-carrying capacity in Measurement ManagementSystems effective foundation is provided every confirmation；And make the fixed survey worked continuously
Amount equipment reaches the purpose of controlled management, and timely and effectively service data is provided for the modern management of enterprise.
Brief description of the drawings
Fig. 1 is flow quantity detecting system structural representation provided by the utility model.
Embodiment
The embodiment of the present application solves by providing a kind of online contrastive test device of ultrasonic flow and flow quantity detecting system
The test verification operation for the fixed flowmeter being fixed in the prior art on fluid circuit is complicated, and efficiency is low, influences pipeline
The technical problem of operating efficiency；Reach lifting maintenance reliability, reduced the influence to producing pipeline, keep production efficiency.
In order to be better understood from above-mentioned technical proposal, below in conjunction with Figure of description and specific embodiment to upper
State technical scheme to be described in detail, it should be understood that the specific features in the utility model embodiment and embodiment are to this Shen
Please technical scheme detailed description, rather than the restriction to technical scheme, in the case where not conflicting, the application is real
Applying the technical characteristic in example and embodiment can be mutually combined.
Referring to Fig. 1, a kind of online contrastive test device of ultrasonic flow, it is fixed on for testing verification on fluid circuit
Fixed flowmeter 2；Including：Ultrasonic flowmeter 1, signal isolation unit and flow integrator；
The ultrasonic flowmeter 1 is connected by the signal isolation unit with the flow integrator；Monitoring note in real time
Record the flow in fluid circuit.
When performing test verification, the ultrasonic flowmeter 1 is arranged on the fluid circuit, positioned at described fixed
Flowmeter side；Synchronous detection flows, the foundation as test correction.
Portable type ultrasonic flowmeter A is arranged on the same pipelines of tested instrument B, one it is noted that the selection of measurement point has
Enough straight lengths, measurement point answer no-welding-seam, without friction and without electromagnetic interference source etc.;Second, pipe diameter and pipe thickness will standards
Really measurement, as shown in Figure 1.
Ultrasonic flowmeter typically has two kinds of probe mounting means, the i.e. installation of Z methods and the installation of V methods.Caliber is adopted less than DN600
Installed with V methods；Caliber is more than DN600 and installed using Z methods.
Started counting up when signal receiving strength and measurement value stabilization, otherwise should adjust probe installation location and distance, make
Signal intensity is better closer to 100%.The actual range for installation of popping one's head in should also be measured, and recorded before starting contrastive test
It is for future reference.
The instantaneous delivery and integrated flow of two flowmeters are recorded simultaneously, and the testing time is no less than 0.5 min, to flow
The pipeline changed greatly, it should be tested by flow rates stepping.
It can be traced to the source by application and the portable type ultrasonic flowmeter within effective calibrating phase, installed in online with scene
On the same pipeline of the flowmeter of formula measurement liquid medium, in-line meter is verified with portable type ultrasonic flowmeter, counted
Calculate the flow error of tested table.With portable type ultrasonic flowmeter, test is compared to online flowmeter, due to portable instrument
It can reach periodically to the mesh of measurement verification department censorship.As long as exact operations, random error and additional mistake are reduced as far as possible
Difference, the requirement of the accuracy of measuring ± 2% can be reached.
Centered on existing in-line meter, two measurement points, each measurement are selected in equidistant both sides of existing instrument
Point, at 1 point, 2 points in its section, each test once, then removes the data accumulation of front and rear 4 times measurements in 4, obtained number again
It is compared according to in-line meter.
In measurement process, measurement accuracy is mainly influenceed by pipeline factor and installation factor.
The relation of the steel pipe V methods of table 1 installation probe spacing deviation and measurement accuracy
| Spacing caliber | - 50mm | -20mm | -10mm | +10mm | +20mm | + 50mm |
| 200mm | Low signal | 2.08% | 1.65% | -0.44% | -4.25% | Low signal |
| 500mm | 4.87 % | 1.96% | 0.53% | 0.78% | -0.06% | -2.36% |
| 1000mm | 2.49 % | 1.66% | -0.38% | 0.95% | -1.04% | -1.84% |
Combined standard uncertainty:, Coverage factor:
Expanded uncertainty:Given confidence level is 0.95, Coverage factor k=2, and expanded uncertainty is
Relative error determines and amendment
Using the measured value of portable ultrasonic flow rate measurement amount as true value, calculate relative error, relative error ± 2% with
It is interior to be qualified, according to the measurement accuracy scope for being tested online flowmeter, can accordingly change the permissible value of relative error.
Relative error directly can carry out error correction when within ± 5% to tested online flowmeter；Relative error is more than
When ± 5%, Ying Zhao flowmeters production firm is verified, or send measurement verification department to be demarcated.
Acknowledgement interval
Time interval of resuming classes is generally 2 years, according to by the use environment of school flowmeter, frequency of use and use position
Importance can be also decided through consultation by the time interval in school by user and calibration unit, and is evaluated at the metrological confirmation interval carried out every year
Record.
Further, the signal isolation unit includes：Current modulating circuit, isolation change-over circuit and demodulator circuit；
The output end of the ultrasonic flowmeter is connected with the input of the current modulating circuit；
The output end of the current modulating circuit is connected by the isolation change-over circuit with the demodulator circuit；
The output end of the demodulator circuit is connected with the flow integrator.
Primary instrument is fixed on tested pipeline, enters signal isolation unit after measurement data output, to the instrument of detection
The current signal of table carries out isolation conversion, before re-demodulation switches back to isolation by semiconductor modulating transformation by the strong device of magnetic strength
Original signal, through isolation, it is anti-interference the processing such as suppress after export, protection subordinate measure loop；Ambient noise is slackened to test electricity
The influence on road, suppress the tested interference of instrument such as electromagnetic signal and not clear pulse to detection signal.
Measurement data enters flow integrator, and not only instantaneous delivery is recorded, compared, moreover it is possible to which integrated flow is carried out
Record, it is easy to the processing to data after measurement.
Under ideal conditions, its error can reach 1.0% to outer clip portable type ultrasonic flowmeter, it is contemplated that field pipes
The uncertain factor of parameter, the degree of accuracy of in-site measurement can reach 1.5% substantially.So, using outer clip portable ultraphonic wave current
It is more feasible method that gauge, which carries out flowmeter on-line checking,.If ultrasonic flowmeter exists with online flow instrument error
Within ± 2.0%, so that it may which the precision for thinking online instrument is acceptable.If it is out of this range, it is considered as online instrument
Table, there is certain deviation.Just need to be modified in-line meter.
The one or more technical schemes provided in the embodiment of the present application, have at least the following technical effects or advantages：
The online contrastive test device of ultrasonic flow provided in the embodiment of the present application, the online fixed flow of contrastive test
Meter, realize the online contrastive test verification of fixed flowmeter；It is defeated to iron and steel enterprise's kinds of processes system, the size of multiple-quality water
Water lines are balanced, leakage detection and raising measurement instrument metrological confirmation efficiency are significant；Have for iron and steel enterprise and connect
The characteristics of continuous operation, the problem of the off-line calibration after wire mounting flowmeter can not be dismantled according to the re-testing periods is efficiently solved,
Avoiding stopping production, the underproduction that instrument calibration is brought influences, and improves production capacity, reduces metage use, economy and ageing spy
It is unobvious；To the metering room of water-carrying capacity in Measurement ManagementSystems effective foundation is provided every confirmation；And make the fixed survey worked continuously
Amount equipment reaches the purpose of controlled management, and timely and effectively service data is provided for the modern management of enterprise.
It should be noted last that above embodiment is only illustrating the technical solution of the utility model rather than limit
System, although the utility model is described in detail with reference to example, it will be understood by those within the art that, can be right
The technical solution of the utility model is modified or equivalent substitution, without departing from the spirit and model of technical solutions of the utility model
Enclose, it all should cover among right of the present utility model.
Claims (6)
1. a kind of online contrastive test device of ultrasonic flow, it is characterised in that be fixed on fluid circuit for testing verification
Fixed flowmeter；Including：Ultrasonic flowmeter, signal isolation unit and flow integrator；
The ultrasonic flowmeter is connected by the signal isolation unit with the flow integrator；
When performing test verification, the ultrasonic flowmeter is arranged on the fluid circuit, positioned at the fixed flow
Count side.
2. the online contrastive test device of ultrasonic flow as claimed in claim 1, it is characterised in that：
When the diameter of the fluid circuit is less than or equal to 600mm, the probe of the ultrasonic flowmeter is installed using V methods；
When the diameter of the fluid circuit is more than 600mm, the probe of the ultrasonic flowmeter is installed using Z methods.
3. the online contrastive test device of ultrasonic flow as claimed in claim 2, it is characterised in that the signal isolation unit
Including：Current modulating circuit, isolation change-over circuit and demodulator circuit；
The output end of the ultrasonic flowmeter is connected with the input of the current modulating circuit；
The output end of the current modulating circuit is connected by the isolation change-over circuit with the demodulator circuit；
The output end of the demodulator circuit is connected with the flow integrator.
A kind of 4. flow quantity detecting system, it is characterised in that including：The fixed online contrastive test of flowmeter and ultrasonic flow
Device；
The fixed flowmeter is arranged on fluid circuit；
The online contrastive test device of ultrasonic flow includes：Ultrasonic flowmeter, signal isolation unit and flow accumulation
Instrument；
The ultrasonic flowmeter is connected by the signal isolation unit with the flow integrator；
When performing test verification, the ultrasonic flowmeter is arranged on the fluid circuit, positioned at the fixed flow
Count side.
5. flow quantity detecting system as claimed in claim 4, it is characterised in that：
When the diameter of the fluid circuit is less than or equal to 600mm, the probe of the ultrasonic flowmeter is installed using V methods；
When the diameter of the fluid circuit is more than 600mm, the probe of the ultrasonic flowmeter is installed using Z methods.
6. flow quantity detecting system as claimed in claim 5, it is characterised in that the signal isolation unit includes：Current-modulation
Circuit, isolation change-over circuit and demodulator circuit；
The output end of the ultrasonic flowmeter is connected with the input of the current modulating circuit；
The output end of the current modulating circuit is connected by the isolation change-over circuit with the demodulator circuit；
The output end of the demodulator circuit is connected with the flow integrator.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195447A (en) * | 2018-02-13 | 2018-06-22 | 无锡慧联流体技术有限公司 | flowmeter calibration system and calibration method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108195447A (en) * | 2018-02-13 | 2018-06-22 | 无锡慧联流体技术有限公司 | flowmeter calibration system and calibration method |
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