CN1920498A - Online fluid flow detection device for natural gas flowmeter - Google Patents
Online fluid flow detection device for natural gas flowmeter Download PDFInfo
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- CN1920498A CN1920498A CN 200610104546 CN200610104546A CN1920498A CN 1920498 A CN1920498 A CN 1920498A CN 200610104546 CN200610104546 CN 200610104546 CN 200610104546 A CN200610104546 A CN 200610104546A CN 1920498 A CN1920498 A CN 1920498A
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Abstract
The invention relates to a testing corrector, especially an online corrector of flux meter, wherein said tester comprises valve, connecting flange, standard flux meter, and connecting tubes; the invention is characterized in that: it is U-shaped tube which is serially connected with two standard flux meters; two ends of U-shaped tube are fixed with connecting flanges connected to the testing tube. The invention has simple structure and high accuracy. Since the invention uses two standard flux meters to test the flux meter at same time, while said two standard flux meters work at different theories, the flux of tube can be tested accurately; and the testing data of standard flux metes can correct the tested flux meter. When the invention is mounted on the testing cart, all flux meters of tube can be movably online tested.
Description
Technical field
The present invention relates to a kind of Online fluid flow detection device of flowmeter calibrating installation, particularly a kind of natural gas flowmeter.
Background technology
According to the requirement of " measurement Law " and meter proof rules, must regularly examine and determine and calibrate the accuracy of the flowmeter in the metering of rock gas long-distance transport pipes trade transaction, using maximum calibration methods at present is exactly off-line checking method and dry type checking method.Wherein the off-line checking method is cascaded tested flowmeter and flow standard device exactly, makes flow flow through tested flow simultaneously and takes into account standard set-up, weighs the method for tested flowmeter accuracy grade with the variable of standard set-up.Off-line coefficient checking method is fit to and the measurement occasion very not high to the flow measurement accuracy requirement, it has embodied the dynamic characteristic that flow is traced to the source, but be difficult to accomplish to trace to the source or the sealing of transfer chain, because it is consistent that the test condition of flow instrument is difficult to actual service conditions, the cost of selecting this calibration method is the additive error of being introduced.And must tear table open inspects by ready samples, and China carries out rock gas calibrating at present Chengdu gas discharge substation only arranged, if tested table size is bigger, dismounting, censorship difficulty are all bigger, also require applying unit must stop air feed or preparation backing sheet, bring very big difficulty to organization of production.
The dry type calibrating belongs to indirect multiple measurement method, only need to detect the geometrical construction and the each several part size of the flow meter component that influences the flow measurement result, calibration and the measurement instrument of the relevant all parameters of flow rate calculation and relate to the auxiliary equipment of measurement result, and the installation of inspection instrument, operate and whether be carried out in accordance with regulations.It is only applicable to orifice plate, nozzle and venturi flowmeter, and calibration accuracy is low, can't qualitative, quantitatively grasp the error of tested flowmeter, can not directly calibrate or assignment flow instrument, also can't eliminate additive errors such as installation.
In recent years, along with building up of rock gas long-distance transport pipes such as capital, Shan, transfering natural gas from the west to the east, rock gas in the application of China also more and more widely, the economic interests of the accurate and reliable direct relation both sides of supply and demand of its metering, when particularly measuring for the very large fluid of flow, if the precision of flowmeter is not high, its cumulative amount will be a very large numerical value, directly have influence on national interests and user's economic interests.How can solve online flowmeter easily and detect this problem, be the problem that relevant scientific and technical personnel are making great efforts solution always.
Summary of the invention
The present invention is directed to the deficiency that above prior art exists, a kind of device that can carry out accurate online real stream calibrating easily to the flowmeter on the long-distance transport pipes is provided.
Technical scheme of the present invention is: a kind of Online fluid flow detection device of natural gas flowmeter, comprise flowmeter, connecting line, it is characterized in that on " U " shape pipeline, be installed in series two flowmeter I, II, be fixed with respectively at the import and export end face of " U " shape pipeline and be used for the suction flange and the discharge flange that link to each other with Online fluid flow detection device.
Be separately installed with valve I and valve II between the import and export of above-mentioned " U " shape pipeline and two flowmeter I, the II,
Have the pipeline between two flowmeters in a bye-pass and above-mentioned " U " shape pipeline to be connected, flowmeter III is installed on this bye-pass, the exit end face of bye-pass is fixed with and is used for the joint flange that links to each other with signal piping.
Between the flowmeter III of above-mentioned bye-pass and the joint flange valve III is installed.
Have two trimmer valve I, II in parallel with above-mentioned valve I and valve II respectively, exhaust-valve I links to each other with trimmer valve I.
On bye-pass, there is a trimmer valve III in parallel with the valve III in the above-mentioned pipeline.
Above-mentioned two flowmeter I, II are respectively standard turbo flowmeter and standard ultrasonic flowmeter.
There is a variable valve to be installed on the pipeline between flowmeter II and the valve II.
There is a variable valve to be installed on the pipeline between flowmeter III and the valve III.
There is an exhaust-valve II to link to each other with trimmer valve III.
The characteristics that the present invention has is simple in structure, easy to use, accuracy of detection is high.Because this device is that two different proving flowmeters of principle of work are connected in detected flowmeter, just can point-devicely detect flow in the pipeline by two proving flowmeters.Just can check detected flowmeter easily by the detection data of proving flowmeter then.After this device is installed on the transportable inspection vehicle, just can realize on-the-spot online detection that all flowmeters on the pipeline are moved, very easy to use, solved at present can't online detection flowmeter a difficult problem.
Description of drawings
Accompanying drawing 1 is a fundamental diagram synoptic diagram of the present invention;
Accompanying drawing 2 is a structural representation of the present invention.
Embodiment
As shown in Figure 1, main line 9 and standby transfer pipeline 17 on the header 1 of transport gas, have been installed in parallel, order is equipped with valve 2, main flow meter 3, flow control valve 11 and stop valve 10 on main line, and order is equipped with valve 16, standby flowmeter 15, flow control valve 13 and stop valve 12 on standby transfer pipeline.Regularly detect the precision of the flowmeter on main line and the standby transfer pipeline for convenience, behind the flowmeter on main line and the standby transfer pipeline, be separately installed with the bye-pass that is used to detect.With bye-pass that main line links to each other on, valve 4 is installed, with bye-pass that standby transfer pipeline links to each other on, valve 14 is installed, the outlet of two bye-passes gathers and is signal piping 5, at the endpiece of signal piping 5 flange that links to each other with Online fluid flow detection device 6 is installed.Be connected with the backflow bye-pass 7 that is used to detect behind the stop valve 10 of main line, valve 8 is installed on backflow bye-pass 7, backflow bye-pass 7 endpiece are equipped with the flange that links to each other with Online fluid flow detection device.When normal the use, two flanges on two bye-passes that are used to detect seal it by blind plate, simultaneously with 4,14,8 Close Alls of the valve on two bye-passes.
As shown in Figure 2, Online fluid flow detection device 6 is made up of " U " shape pipeline 35, on " U " shape pipeline, be installed in series and verified with ultrasonic flow meter I34 and standard detection turbo flow meter II33, between the import and export of " U " shape pipeline and two flowmeter I, II, be separately installed with valve I18 and valve II28, be fixed with respectively at the import and export end face of " U " shape pipeline and be used for and detect flange 21 and the flange 23 that bye-pass links to each other.Trimmer valve I19 and trimmer valve II22 are in parallel with valve I and valve II respectively, and exhaust-valve I20 links to each other with trimmer valve I.
When needs detected and check the precision of main flow meter 3, at first the blind plate with the sealing usefulness on the two bye-pass joint flanges took off, and linked to each other with flange 21,23 on the Online fluid flow detection device 6 respectively.Open valve 4 on the bye-pass and the valve 8 on the backflow bye-pass 7, slowly open the trimmer valve I19 in the Online fluid flow detection device 6 then, slowly be pressurized to working pressure for the Online fluid flow detection device pipeline, check whether pipeline leaks gas.Slowly open valve I18 and valve II28 then, slowly regulate the variable valve 30 that is installed between flowmeter II33 and the valve II28, until standard-sized sheet, make rock gas begin the Online fluid flow detection device of flowing through, close the flow control valve 11 and the stop valve 10 in tested flowmeter 3 downstreams again, make rock gas all enter Online fluid flow detection device.At this moment, rock gas through the verification in the Online fluid flow detection device 6 ultrasonic flow meter I34 and standard detection turbo flow meter II33, turns back to the downstream main line 9 from Online fluid flow detection device more then at first by tested flowmeter 3.Compare by verifying with ultrasonic flow meter I34 and standard detection detection data and tested flowmeter 3 with turbo flow meter II33, if error is arranged, can carry out the coefficient correction to tested flowmeter, relatively poor relatively as the flowmeter linearity, also can carry out the correction of multiple spot coefficient, therefore can improve the measuring accuracy of tested flowmeter.After detection and check are finished, open the flow control valve 11 and the stop valve 10 in tested flowmeter downstream earlier, slowly close valve 4 on the bye-pass and the valve 8 on the backflow bye-pass 7 again, by the exhaust-valve I20 that links to each other with trimmer valve I19 the rock gas in the Online fluid flow detection device pipeline is carried out emptying then, again valve I18, valve II28 and variable valve 30 in the real stream of the line calibrating installation are closed after emptying is intact, dismantle joint flange, the blind plate of sealing usefulness is loaded onto and got final product.
When needs detect and check standby flowmeter 15, at first the blind plate with the sealing usefulness on the two bye-pass joint flanges takes off, and link to each other with flange 21,23 on the Online fluid flow detection device 6 respectively, open valve 14 on the bye-pass and the valve 8 on the backflow bye-pass 7 then, slowly open the trimmer valve I19 in the Online fluid flow detection device 6 then, slowly be pressurized to working pressure for the Online fluid flow detection device pipeline, check whether pipeline leaks gas.All the other processes are identical with the precision process of detection and check main flow meter 3, are not repeated herein.
When needs detect and check the flowmeter of low discharge, " U " type signal piping that can select the verification in the Online fluid flow detection device to form with turbo flow meter III31 with the standard detection of installing on ultrasonic flow meter I 34 and the bye-pass 32.During connection the flange on two bye-passes on the flange 24 in the outlet of flange 21 and bye-pass and the detected pipeline is linked to each other.Open valve 4 on the bye-pass and the valve 8 on the backflow bye-pass 7, slowly open the trimmer valve I19 in the Online fluid flow detection device 6 then, slowly be pressurized to working pressure for the Online fluid flow detection device pipeline, check whether pipeline leaks gas.Slowly open valve I18 and valve III27 then, slowly regulate the variable valve 29 that is installed between flowmeter III31 and the valve III27, until standard-sized sheet, make rock gas begin the Online fluid flow detection device of flowing through, close the flow control valve 11 and the stop valve 10 in tested flowmeter 3 downstreams again, make rock gas all enter Online fluid flow detection device.At this moment, rock gas through the verification in the Online fluid flow detection device 6 ultrasonic flow meter I34 and standard detection turbo flow meter III31, turns back to the downstream main line 9 from Online fluid flow detection device more then at first by tested flowmeter 3.Compare by verifying with ultrasonic flow meter I34 and standard detection detection data and tested flowmeter 3 with turbo flow meter III31, if error is arranged, can carry out the coefficient correction to tested flowmeter, relatively poor relatively as the flowmeter linearity, also can carry out the correction of multiple spot coefficient, therefore can improve the measuring accuracy of tested flowmeter.
After detection and check are finished, open the flow control valve 11 and the stop valve 10 in the downstream of tested flowmeter earlier, slowly close valve 4 on the bye-pass and the valve 8 on the backflow bye-pass 7 again, by the exhaust-valve II25 that links to each other with trimmer valve III26 the rock gas in the Online fluid flow detection device pipeline is carried out emptying then, again valve I18, valve III27 and variable valve 29 in the real stream of the line calibrating installation are closed after emptying is intact, dismantle joint flange, the blind plate of sealing usefulness is loaded onto and got final product.
What calibrating was adopted is integrated flux, and the value time can be selected longer relatively, has avoided instantaneous delivery to change the gauging error that brings like this.By the multi-point flux calibrating, can and take into full account the influence of factors such as on-the-spot installation.
According to the requirement of vertification regulation, need carry out the multi-point flux calibrating.After having examined and determine maximum flow point, on-the-spot spare duct flowmeter 15 puts into operation, by regulating the downstream flow variable valve 13 of Online fluid flow detection device pipeline variable valve 30 and Online fluid flow detection device spare duct flowmeter 15, can realize the flow regulation of multiple spot, and not influence normal production run.
In technique scheme, the principle of work difference of proving flowmeter I, II, III its objective is and improves the accuracy that detects.Flowmeter I24 adopts ultrasonic flow meter, and flowmeter II, III adopt main turbo flow meter, also can adopt the flowmeter of other principle of work.。
For Online fluid flow detection device is connected with flange on the bye-pass easily, can connect by high-pressure hose during connection.
In this device, online gas chromatographicanalyzer can be installed, be used to detect the component of the rock gas that flows through standard scale, its analyzing and testing result transmission is given flow computer, participates in mark condition flow rate calculation, so just can carry out the coefficient correction to detected flowmeter more accurately.
Claims (10)
1, a kind of Online fluid flow detection device of natural gas flowmeter, comprise flowmeter, connecting line, it is characterized in that on " U " shape pipeline (35), be installed in series two flowmeter I (34), II (33), be fixed with respectively at the import and export end face of " U " shape pipeline and be used for the suction flange (21) and the discharge flange (23) that link to each other with Online fluid flow detection device.
2, the Online fluid flow detection device of natural gas flowmeter according to claim 1 is characterized in that being separately installed with valve I (18) and valve II (28) between the import and export of above-mentioned " U " shape pipeline and two flowmeter I, II,
3, the Online fluid flow detection device of natural gas flowmeter according to claim 1 and 2, it is characterized in that having the pipeline between two flowmeters in a bye-pass (32) and above-mentioned " U " shape pipeline to be connected, flowmeter III (31) is installed on this bye-pass, and the exit end face of bye-pass is fixed with and is used for the joint flange (24) that links to each other with signal piping.
4, the Online fluid flow detection device of natural gas flowmeter according to claim 3 is characterized in that between the flowmeter III (31) of above-mentioned bye-pass (32) and joint flange (24) valve III (27) being installed.
5, the Online fluid flow detection device of natural gas flowmeter according to claim 2 is characterized in that having two trimmer valve I (18), II (22) in parallel with above-mentioned valve I and valve II respectively, and exhaust-valve I (20) links to each other with trimmer valve I (19).
6, the Online fluid flow detection device of natural gas flowmeter according to claim 4 is characterized in that having on bye-pass a trimmer valve III (26) in parallel with the valve III in the above-mentioned pipeline.
7, the Online fluid flow detection device of natural gas flowmeter according to claim 1 is characterized in that above-mentioned two flowmeter I (34), II (33) are respectively standard turbo flowmeter and standard ultrasonic flowmeter.
8, the Online fluid flow detection device of natural gas flowmeter according to claim 2 is characterized in that having a variable valve (30) to be installed on the pipeline between flowmeter II (33) and the valve II (28).
9, the Online fluid flow detection device of natural gas flowmeter according to claim 4 is characterized in that having a variable valve (29) to be installed on the pipeline between flowmeter III (31) and the valve III (27).
10, the Online fluid flow detection device of natural gas flowmeter according to claim 6 is characterized in that having an exhaust-valve II (25) to link to each other with trimmer valve III (26).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610104546 CN1920498A (en) | 2006-09-11 | 2006-09-11 | Online fluid flow detection device for natural gas flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610104546 CN1920498A (en) | 2006-09-11 | 2006-09-11 | Online fluid flow detection device for natural gas flowmeter |
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| CN1920498A true CN1920498A (en) | 2007-02-28 |
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| CN 200610104546 Pending CN1920498A (en) | 2006-09-11 | 2006-09-11 | Online fluid flow detection device for natural gas flowmeter |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359808A (en) * | 2011-09-14 | 2012-02-22 | 中国航空工业集团公司西安飞机设计研究所 | On-site calibration method of airplane liquid flow |
| CN102853882A (en) * | 2011-06-27 | 2013-01-02 | 南京梅山冶金发展有限公司 | System and method for carrying out detection compensation on coal gas flow rate of lime kiln |
| CN103292878A (en) * | 2013-06-26 | 2013-09-11 | 北京聚雅科技有限公司 | Calibrating device for high-pressure natural gas flow meter |
| CN103453967A (en) * | 2013-08-05 | 2013-12-18 | 中国计量学院 | Natural gas energy meter |
| CN104634423A (en) * | 2015-02-09 | 2015-05-20 | 西安朗威科技有限公司 | Method for calibrating high-pressure flow meters of water injection wells in oil fields in online manner |
| CN110160609A (en) * | 2018-02-13 | 2019-08-23 | 广州能源检测研究院 | A kind of double calibrating gas flow apparatus parallel structures and detection method |
| CN110671691A (en) * | 2019-10-31 | 2020-01-10 | 长沙经济技术开发区祥原动力供应有限公司 | Multifunctional boiler water supply deoxidization system |
| CN113155243A (en) * | 2021-04-30 | 2021-07-23 | 北京极达测控设备技术有限公司 | High-pressure natural gas mobile verification vehicle |
| CN114061710A (en) * | 2021-11-13 | 2022-02-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Online calibration system and calibration method for engine fuel flow meter |
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2006
- 2006-09-11 CN CN 200610104546 patent/CN1920498A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853882A (en) * | 2011-06-27 | 2013-01-02 | 南京梅山冶金发展有限公司 | System and method for carrying out detection compensation on coal gas flow rate of lime kiln |
| CN102359808A (en) * | 2011-09-14 | 2012-02-22 | 中国航空工业集团公司西安飞机设计研究所 | On-site calibration method of airplane liquid flow |
| CN103292878A (en) * | 2013-06-26 | 2013-09-11 | 北京聚雅科技有限公司 | Calibrating device for high-pressure natural gas flow meter |
| CN103453967A (en) * | 2013-08-05 | 2013-12-18 | 中国计量学院 | Natural gas energy meter |
| CN104634423A (en) * | 2015-02-09 | 2015-05-20 | 西安朗威科技有限公司 | Method for calibrating high-pressure flow meters of water injection wells in oil fields in online manner |
| CN104634423B (en) * | 2015-02-09 | 2017-11-28 | 西安朗威科技有限公司 | The method of water injection well in oil fields high-pressure flowmeter on-line proving |
| CN110160609A (en) * | 2018-02-13 | 2019-08-23 | 广州能源检测研究院 | A kind of double calibrating gas flow apparatus parallel structures and detection method |
| CN110671691A (en) * | 2019-10-31 | 2020-01-10 | 长沙经济技术开发区祥原动力供应有限公司 | Multifunctional boiler water supply deoxidization system |
| CN113155243A (en) * | 2021-04-30 | 2021-07-23 | 北京极达测控设备技术有限公司 | High-pressure natural gas mobile verification vehicle |
| CN113155243B (en) * | 2021-04-30 | 2021-10-15 | 北京极达测控设备技术有限公司 | High-pressure natural gas mobile verification vehicle |
| CN114061710A (en) * | 2021-11-13 | 2022-02-18 | 中国航发沈阳黎明航空发动机有限责任公司 | Online calibration system and calibration method for engine fuel flow meter |
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Application publication date: 20070228 |