CN203758587U - Calibrating device for small-flow gas flow meter - Google Patents
Calibrating device for small-flow gas flow meter Download PDFInfo
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- CN203758587U CN203758587U CN201420153465.6U CN201420153465U CN203758587U CN 203758587 U CN203758587 U CN 203758587U CN 201420153465 U CN201420153465 U CN 201420153465U CN 203758587 U CN203758587 U CN 203758587U
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- flow meter
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Abstract
The utility model discloses a calibrating device for a small-flow gas flow meter. The device comprises a compression gas supply unit, a mass flow meter, a main standard and a gas flow meter to be calibrated which are connected sequentially through a connection pipe and further comprises an adjusting valve and an industrial control unit. The main standard is a piston gas flow meter, and the adjusting valve is arranged on the connection pipe between the compression gas supply unit and the mass flow meter. The industrial control unit is connected with the adjusting valve, the mass flow meter, the piston gas flow meter and the gas flow meter to be calibrated. According to the calibrating device, the accuracy class can reach 0.05, and compared with bell jar type calibrating devices (0.2 or below) and standard meter method calibrating devices (0.25 or below), the calibrating device has high superiority and is quite applicable to calibration of small-flow gas flow meters.
Description
Technical field
The utility model relates to the calibrating installation technical field of gas meter, especially a kind of calibrating installation of small-flow gas flowmeter.
Background technology
The calibrating installation type of gas meter is a lot, has the types such as bell-jar, pVTt method, method of standard table, and be widely used in the transmission of quantity value of gas flow and trace to the source, and the inspection verifying work of gas meter.Various types of calibrating installations have different class of accuracies and measurement range, are applied to different fields, as bell-jar calibrating installation is mainly used in middle low discharge (0.1m
3/ h～100m
3calibrating, the method for standard table calibrating installation of/gas meter h) are mainly used in big-and-middle flow (10m
3more than/h) calibrating, the pVTt method calibrating installation of gas meter be mainly used in the transmission of quantity value to standard scale.In actual use, the bell-jar and the method for standard table calibrating installation that need towards gas meter calibrating are comparatively general, have the high advantage of calibrating efficiency.But in recent years, along with the further raising of research and development technology, more the gas meter of low discharge is employed gradually, and its minimum flow can control to 0.01m
3/ h, conventional bell-jar and method of standard table calibrating installation cannot reach calibrating requirement.
Utility model content
The utility model is for the deficiencies in the prior art, a kind of calibrating installation of small-flow gas flowmeter is proposed, the class of accuracy that can reach is 0.05 grade, compare and there is very high superiority in bell-jar (0.2 grade or following), method of standard table (0.25 grade or following) calibrating installation, be highly suitable for the calibrating of small-flow gas flowmeter.
In order to realize above-mentioned utility model object, the utility model provides following technical scheme: a kind of calibrating installation of small-flow gas flowmeter, comprise the compressed gas source feeding mechanism being linked in sequence by connecting line, mass flowmeter, Main Regulator and gas flowmeter body, also comprise variable valve and industrial control equipment, described Main Regulator is piston type gas flow meter, described variable valve is arranged on the connecting line between compressed gas source feeding mechanism and mass flowmeter, described industrial control equipment by data line respectively with variable valve, mass flowmeter, piston type gas flow meter is connected with gas flowmeter body.
Further, the piston of piston type gas flow meter is made up of graphite material.
Further, the class of accuracy of described piston type gas flow meter is 0.15～0.2 grade.
Further, the class of accuracy of described piston type gas flow meter is 0.15 grade.
Further, the class of accuracy of described mass flowmeter is 0.2 grade.
Further, described compressed gas source feeding mechanism is nitrogen cylinder.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model can meet the more calibrating requirement of the gas meter of low discharge, and effective range is 0.018～180m
3/ h.If prepare the piston liquid meter of three different measuring scopes as Main Regulator, and select according to the actual requirements one, almost can meet the calibrating requirement of existing various small-flow gas flowmeters, and substantially contain the gas meter of middle flow at every turn.
(2) class of accuracy that calibrating installation of the present utility model can reach is 0.05 grade, compare and there is very high superiority in bell-jar (0.2 grade or following), method of standard table (0.25 grade or following) calibrating installation, reached the highest ranking of existing gas flow standard device.
(3) calibrating installation of the present utility model has been realized the verification process of robotization, the collection of every data, the adjusting of valve opening are realized by industrial control equipment, and can complete whole verification process, comprise processing, the preservation of examining and determine data, the contents such as the judgement of verification result.The automaticity with height, has improved calibrating efficiency, has avoided the introducing of personal error simultaneously, has ensured the reliability of verification result.
(4) the utility model adopts high-precision mass rate to count the watch-dog of instantaneous delivery, class of accuracy is 0.2 grade, in the situation that tested flowmeter class of accuracy is lower, also can adopt mass rate to count standard, gas flowmeter body is compared together with standard with Main Regulator, improved the practicality of device.
Brief description of the drawings
Fig. 1 is the calibrating installation structural representation of small-flow gas flowmeter of the present utility model;
Wherein: 1-compressed gas source feeding mechanism, 2-variable valve, 3-connecting tube, 4-mass flowmeter, 5-piston type gas flow meter, 6-data line, 7-gas flowmeter body, 8-industrial control equipment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail, the description of this part is only exemplary and explanatory, should not have any restriction to protection domain of the present utility model.
The calibrating installation of a kind of small-flow gas flowmeter as shown in Figure 1, comprises compressed gas source feeding mechanism 1, variable valve 2, mass flowmeter 4, piston type gas flow meter 5, gas flowmeter body 7 and industrial control equipment 8.In the present embodiment, compressed gas source feeding mechanism 1 is nitrogen cylinder.Wherein compressed gas source feeding mechanism 1, mass flowmeter 4, piston type gas flow meter 5 and gas flowmeter body 7 are linked in sequence by connecting tube 3, and variable valve 2 is arranged on the connecting line 3 between compressed gas source feeding mechanism 1 and mass flowmeter 4.Industrial control equipment 8 is provided with calibrating procedure, and it is connected with variable valve 2, mass flowmeter 4, piston type gas flow meter 5 and gas flowmeter body 7 respectively by data line 6, for the control of the data acquisition to them and variable valve 2 apertures.
Compressed gas source feeding mechanism 1, for the utility model provides the simple nitrogen of voltage stabilizing, current stabilization state, is conducive to the control of verification result.Compressed gas source feeding mechanism 1 is by the size of the aperture control gas flow of variable valve 2, to realize the calibrating requirement of different flow point.Mass flowmeter 4 is for monitoring the instantaneous delivery of verification process, for variable valve 2 provides adjusting foundation, also for calibrating flow point provides reference.Piston type gas flow meter 5 is Main Regulators of calibrating installation of the present utility model, in order to meet the gas meter calibrating requirement of different flow scope, device can adopt the piston type gas flow meter (also having two Main Regulators for subsequent use) of three different measuring scopes, in verification process, can need to change according to calibrating, ensure the practicality of calibrating installation.Industrial control equipment 8 has been realized the automatic calibration process of the utility model calibrating installation, can Real-time Collection mass flowmeter 4, the data on flows of piston type gas flow meter 5 and gas flowmeter body 7, according to the instantaneous delivery value automatic regulating valve door aperture of mass flowmeter, realize automatic verification process.
Preferably, the piston of piston type gas flow meter 5 is made up of graphite material.The class of accuracy of piston type gas flow meter 5 can be 0.15～0.2 grade.In the present embodiment, the class of accuracy of piston type gas flow meter 5 is 0.15 grade, and the class of accuracy of mass flowmeter 4 is 0.2 grade.
Before calibrating starts, select suitable piston type gas flow meter 5 according to the measurement range of gas flowmeter body 7, after installing, open industrial control equipment 8, check that whether every data acquisition state is normal.Calibrating flow point, calibrating number of times, calibrating time and accumulated value are set in industrial control equipment 8, after start calibrating.
Industrial control equipment 8 regulating and controlling valves 2 are progressively opened, the flow value of simultaneous real-time monitoring mass flowmeter 4, and in the time that flow value approaches or reach first calibrating flow point, regulating and controlling valve 2 keeps current state, waits for stability of flow.Arrive first calibrating flow point at the flow value of mass flowmeter 4, the instantaneous delivery value of industrial control equipment 8 Real-time Collection piston type gas flow meters 5 and gas flowmeter body 7, records, preserves and calculate the error of indication; Then examine and determine collection and the calculating of data next time.After the calibrating number of times of this calibrating flow point completes, enter next calibrating flow point.
Industrial control equipment 8 regulating and controlling valves 2 progressively increase aperture, until the instantaneous delivery value of mass flowmeter 4 approaches or reaches second calibrating flow point, keep current aperture, wait for after stability of flow certain hour, repeat said process and continue calibrating.
After all calibrating flow points complete, industrial control equipment 8 regulating and controlling valves 2 cut out, and stop the data of acquisition quality flowmeter 4, piston type gas flow meter 5 and tested flowmeter 7, judge verification result output calibrating record according to calibrating data.Whole verification process completes.
Finally it should be noted that: these are only preferred embodiment of the present utility model; be not limited to the utility model; although the utility model is had been described in detail with reference to embodiment; for a person skilled in the art; its technical scheme that still can record previous embodiment is modified; or part technical characterictic is wherein equal to replacement; but all within spirit of the present utility model and principle; any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (6)
1. the calibrating installation of a small-flow gas flowmeter, it is characterized in that: comprise the compressed gas source feeding mechanism, mass flowmeter, Main Regulator and the gas flowmeter body that are linked in sequence by connecting line, also comprise variable valve and industrial control equipment, described Main Regulator is piston type gas flow meter, described variable valve is arranged on the connecting line between compressed gas source feeding mechanism and mass flowmeter, and described industrial control equipment is connected with variable valve, mass flowmeter, piston type gas flow meter and gas flowmeter body respectively by data line.
2. the calibrating installation of small-flow gas flowmeter according to claim 1, is characterized in that: the piston of piston type gas flow meter is made up of graphite material.
3. the calibrating installation of small-flow gas flowmeter according to claim 1, is characterized in that: the class of accuracy of described piston type gas flow meter is 0.15～0.2 grade.
4. the calibrating installation of small-flow gas flowmeter according to claim 3, is characterized in that: the class of accuracy of described piston type gas flow meter is 0.15 grade.
5. the calibrating installation of small-flow gas flowmeter according to claim 1, is characterized in that: the class of accuracy of described mass flowmeter is 0.2 grade.
6. the calibrating installation of small-flow gas flowmeter according to claim 1, is characterized in that: described compressed gas source feeding mechanism is nitrogen cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420153465.6U CN203758587U (en) | 2014-03-31 | 2014-03-31 | Calibrating device for small-flow gas flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420153465.6U CN203758587U (en) | 2014-03-31 | 2014-03-31 | Calibrating device for small-flow gas flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203758587U true CN203758587U (en) | 2014-08-06 |
Family
ID=51253843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420153465.6U Expired - Fee Related CN203758587U (en) | 2014-03-31 | 2014-03-31 | Calibrating device for small-flow gas flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203758587U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323426A (en) * | 2015-06-30 | 2017-01-11 | 上海梅山钢铁股份有限公司 | A continuous casting crystallizer online argon blowing flow meter measuring precision correction device and correction method |
| CN109696228A (en) * | 2019-03-06 | 2019-04-30 | 成立航空技术有限公司 | A kind of aerospace automatic calibration unit for gas flowmeters and its calibration method |
-
2014
- 2014-03-31 CN CN201420153465.6U patent/CN203758587U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323426A (en) * | 2015-06-30 | 2017-01-11 | 上海梅山钢铁股份有限公司 | A continuous casting crystallizer online argon blowing flow meter measuring precision correction device and correction method |
| CN106323426B (en) * | 2015-06-30 | 2019-11-19 | 上海梅山钢铁股份有限公司 | Continuous cast mold on-line argon-blow flow measurement accuracy of measurement bearing calibration |
| CN109696228A (en) * | 2019-03-06 | 2019-04-30 | 成立航空技术有限公司 | A kind of aerospace automatic calibration unit for gas flowmeters and its calibration method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20150331 |
|
| EXPY | Termination of patent right or utility model |