CN105222865A - Turbo flow meter on-line monitoring method and device - Google Patents
Turbo flow meter on-line monitoring method and device Download PDFInfo
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- CN105222865A CN105222865A CN201510436972.XA CN201510436972A CN105222865A CN 105222865 A CN105222865 A CN 105222865A CN 201510436972 A CN201510436972 A CN 201510436972A CN 105222865 A CN105222865 A CN 105222865A
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Abstract
The present invention relates to a kind of turbo flow meter on-line monitoring method and device.The present invention is provided with temperature transmitter and pressure unit in tested turbo flow meter both sides, and the import and export of tested turbo flow meter are simultaneously monitored its pressure by differential pressure transmitter and changed; Each self-corresponding standard turbine meter is selected after header, then be connected with fan inlet through flow control valve, fan outlet leads directly to air the present invention as gas outlet can realize the functions such as the Row control such as assay calibration monitoring, temperature and pressure data acquisition, valve switch control, flow regulation, data processing and report generation automatically, can the monitoring result of accurate stable, man-machine interface be supplied friendly by Quick, monitor procedure simple and effective.
Description
Technical field
The invention belongs to flow meter checking technical field, relate to a kind of turbo flow meter on-line monitoring method and device.
Background technology
In rock gas gasmetry instrument, turbo flow meter controls in rock gas accurate measurement and trade, industrial processes, monitoring, measure in play vital effect.The catastrophic failure if turbo flow meter is in operation, will bring great security risk and economic loss.In addition the measuring-signal of turbo flow meter is subject to the impact of many kinds of parameters, if in use enough attention will not will have a strong impact on measuring accuracy.Therefore, strengthen just being extremely important to the real-time monitoring of turbo flow meter and trouble hunting.At present, the prevention of turbo flow meter fault is mainly realized by calibrating of fixed place and time maintenance, calibrating maintenance cost is higher, and effect is unsatisfactory, if simultaneously can not Timeliness coverage problem, along with the continuity of time, tolerance loss accumulation can get more and more, and the difficulty of recovery gas expense also can be increasing.In this case, the scheme of turbo flow meter on-line monitoring just receives and payes attention to widely.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provide a kind of turbo flow meter on-line monitoring method and device.
The technical scheme that technical solution problem of the present invention is taked is:
The present invention includes blower fan, flow control valve, standard turbine meter, the first header and the second header.
Before first, straight pipeline is connected by the tested turbo flow meter import of flange and heavy caliber, before this first straight pipeline installs principal pressure transmitter, the outlet of the tested turbo flow meter of heavy caliber is connected with straight pipeline after first by flange, before first, on straight pipeline, the distance of distance heavy caliber tested turbo flow meter entrance point 1DN is bored a pressure port and is connected the first differential pressure transmitter high-pressure side by flexible pipe, on straight pipeline, the distance of distance heavy caliber tested turbo flow meter endpiece 1DN is bored a pressure port and is connected the first differential pressure transmitter low pressure end by flexible pipe after first, after this first straight pipeline installs main temperature transmitter, rear straight pipeline outlet is connected with main hand valve import by flange.
Main hand valve outlet is connected with the first header import by adapter flange, and the outlet of the first header connects two branch roads, is respectively the first branch road and the second branch road; First branch road is identical with the second branch structure, includes standard turbine meter, from hand valve, from temperature transmitter with from pressure unit; Wherein standard turbine meter import exports with the first header and is connected; Being arranged on standard turbine meter and the first header from pressure unit exports between the pipeline that is connected; Standard turbine meter exports manually valve and is connected with the second header import, is arranged between the pipeline that standard turbine meter is connected with the second header import from temperature transmitter.
Second header outlet is connected with flow control valve import, and flow regulation valve outlet port is connected with fan inlet by hard flexible pipe, and fan outlet leads directly to air as gas outlet.
Said apparatus is utilized to carry out the method for turbo flow meter on-line monitoring:
First tested turbo flow meter passage is chosen according to the flow point of setting, then the switch valve of respective channel is opened, other standards turbo flow meter channel valve acquiescence is in closed condition, flow regulation valve opening is set, start Frequency Converter Control high-pressure frequency-conversion blower fan and carry out flow regulation, gas enters from straight pipeline entrance before first, successively by tested turbo flow meter, main hand valve, the first header, standard turbine meter, the second header, flow control valve, finally discharge from blower fan.
After setting flow point, timing is started until standard turbine meter stability of flow, carry out step-by-step counting simultaneously, meanwhile tested turbo flow meter also adopts synchronizing pulse counting method carry out step-by-step counting and monitor timing, because turbo flow meter unit volume flow pulse number is constant, calculate the instantaneous delivery of tested turbo flow meter according to umber of pulse in the unit interval.To blind off a line system after calibrating or calibration period terminate, respective volumetric flow rate is calculated by tested turbo flow meter and standard turbine meter umber of pulse, read and record pressure unit, temperature transmitter and differential pressure variator current data, basic parameter simultaneously in conjunction with every platform turbo flow meter goes out instantaneous delivery according to differential flow models fitting curve and formulae discovery, draws with it the metering performance of tested turbo flow meter more afterwards.
Beneficial effect of the present invention is: the present invention can realize the functions such as the Row control such as assay calibration monitoring, temperature and pressure data acquisition, valve switch control, flow regulation, data processing and report generation automatically, can the monitoring result of accurate stable, man-machine interface be supplied friendly by Quick, monitor procedure simple and effective.
Accompanying drawing explanation
Fig. 1 is apparatus structure partial schematic diagram of the present invention.
Fig. 2 is apparatus structure schematic diagram of the present invention.
Fig. 3 is data acquisition control system figure of the present invention.
Embodiment
The present embodiment forms (see figure 1) primarily of turbo flow meter on-line measurement system (vitals comprises pressure unit 1, tested turbo flow meter 2, differential pressure transmitter 3 and temperature transmitter 4), this three part of data acquisition control system 5, supervisory system 6.Example is counted with the tested turbine flow of DN80, as shown in Figure 1, lower left is airintake direction, setting pressure transmitter 1 on front straight pipeline, front straight pipeline outlet is connected with tested turbo flow meter 2 by flange, connect a differential pressure variator 3 at tested turbo flow meter 2 entrance end, the outlet of tested turbo flow meter 2 is connected with rear straight pipeline by flange, rear straight pipeline is installed temperature transmitter 4.Be connected in data acquisition system (DAS) 5 by each signal wire that pressure unit 1, tested turbo flow meter 2, differential pressure variator 3 and temperature transmitter 4 export, data acquisition system (DAS) 5 is connected with computing machine by 485 communication modules.
In the monitoring data collection time T of regulation, the front and back pressure change of measuring tested turbo flow meter 2 with regard to differential pressure transmitter 3 is analyzed and researched with flowmeter fluctuations in discharge and accuracy of instrument, the differential pressure recorded and instantaneous delivery that in the same time, umber of pulse calculates tested turbo flow meter 2 are fitted to differential flow curve, and stored in database.Select to preserve the differential flow curve map in different time sections monitoring timing, the differential flow curve calling surrounding time section in current monitoring period is compared, and whether analyzes tested turbo flow meter 2 in certain reasonable employment scope simultaneously.And calculated the instantaneous delivery of tested turbo flow meter 2 according to the differential flow opisometer that this flowmeter draws by the basic parameter of the differential pressure recorded, temperature, pressure data and every platform turbo flow meter; umber of pulse calculates the instantaneous delivery comparison of tested turbo flow meter 2 in the flowmeter same time therewith again, judge flowmeter whether all the time in flow range, whether exception or saltus step.
Whether supervisory system exceeds normal rationally value range by the crushing loss of the tested turbo flow meter 2 of the evaluation criteria Real-Time Monitoring of running status quality in addition, and immediate analysis and reason of fixing a breakdown.Again because trade settlement uses mark condition volumetric flow rate, and for the intelligent volume correction instrument temperature dependent pressure transducer Measurement sensibility more of turbo flow meter, so extremely important at the Measurement sensibility of pressure working condition state and temperature case state estimation temperature, pressure, differential pressure transmitter.So carry out collection monitoring for pressure, temperature, differential pressure data and analyze simultaneously, understand the operation conditions of tested turbo flow meter at any time, judge the quality of tested turbo flow meter 2 running status in time and the Measurement sensibility of accurate evaluation temperature, pressure, differential pressure transmitter.
Turbo flow meter on-line monitoring device can the data of collection monitoring object as can be seen here, gas in gas measurement system is carried out to the treatment and analysis of datumization, and then analysis processing result is connected on the serial ports of supervisory system by RS-485 modular converter, for technician provides detailed ruuning situation data, thus reach and on-line monitoring is carried out to turbo flow meter and can the object of Timeliness coverage hidden danger.
Turbo flow meter on-line measurement system, comprises blower fan, frequency converter, flow control valve, hand valve, standard turbine meter, tested turbo flow meter, front straight pipeline, rear straight pipeline, header, pressure unit, differential pressure transmitter, temperature transmitter composition (see figure 2).
Front straight pipeline is connected by the tested turbo flow meter of flange and heavy caliber (DN80 or DN100) import, setting pressure transmitter on straight pipeline before this, the outlet of the tested turbo flow meter of heavy caliber is connected with rear straight pipeline by flange, on front straight pipeline, the distance of distance heavy caliber tested turbo flow meter entrance point 1DN bores a pressure port by flexible pipe connection differential pressure transmitter high-pressure side, on rear straight pipeline, the distance of distance heavy caliber tested turbo flow meter endpiece 1DN bores a pressure port by flexible pipe connection differential pressure transmitter low pressure end, after this straight pipeline installs temperature transmitter, rear straight pipeline outlet is connected with hand valve import by flange, hand valve outlet is connected with the first header import by adapter flange, the outlet of the first header connects two branch roads, be respectively the first branch road and the second branch road, first, second branch road is all that the first header outlet is connected with front straight pipeline by flange, setting pressure transmitter on front straight pipeline, front straight pipeline outlet is connected with standard turbine meter (DN50) import by flange, standard turbine meter outlet is connected with rear straight pipeline by flange, rear straight pipeline installs temperature transmitter, rear straight pipeline outlet is connected with hand valve import by flange, hand valve outlet is connected with the second header import by flange, second header outlet is connected with flow control valve import by flange, flow regulation valve outlet port is connected with fan inlet by hard flexible pipe, fan outlet leads directly to air as gas outlet, this external power is received on blower motor through frequency converter.
Wherein the first branch road and the second branch road middle branch are the 3rd branch road, this branch road is small-bore tested turbo flow meter (DN50) proving installation, hand valve import is communicated with air, hand valve outlet is connected with front straight pipeline by flange, setting pressure transmitter on front straight pipeline, front straight pipeline outlet is connected with small-bore tested turbo flow meter import by flange, the outlet of small-bore tested turbo flow meter is connected with rear straight pipeline by flange, on front straight pipeline, the distance of the small-bore tested turbo flow meter entrance point 1DN of distance bores a pressure port by flexible pipe connection differential pressure transmitter high-pressure side, on rear straight pipeline, the distance of the small-bore tested turbo flow meter endpiece 1DN of distance bores a pressure port by flexible pipe connection differential pressure transmitter low pressure end, after this straight pipeline installs temperature transmitter, rear straight pipeline outlet is connected with the first header by flange.
Selected by the bore of tested turbo flow meter, select whether open the 3rd branch road hand valve, select test pipeline section and air intake opening thus.Simultaneously according to the measuring flow scope of tested turbo flow meter, select the hand valve opening the first branch road or the second branch road, select suitable aperture point, allow gas flow through tested turbo flow meter and standard turbine meter, tested turbo flow meter is recorded by data acquisition system, standard turbine meter pulse signal, calculate instantaneous delivery and integrated flux, gather simultaneously and record pressure unit pressure signal, temperature transmitter temperature signal, differential pressure transmitter differential pressure signal, wherein temperature transmitter, the data that pressure unit gathers, be used for turbo flow meter temperature and pressure compensation and to be calculated the instantaneous delivery of tested turbo flow meter by differential flow model with the data of differential pressure transmitter collection.
As shown in Figure 2, from left to right, this device is pressed source of the gas type and is adopted negative pressure method, and front straight pipeline entrance leads directly to air.Front straight pipeline outlet is connected with tested turbo flow meter import by flange, front straight pipeline length meets the requirement being more than or equal to 10DN (DN is turbo flow meter inside nominal diameter), setting pressure transmitter 1 on front straight pipeline, the measuring position of pressure is apart from tested turbo flow meter 2 entrance point 4DN, pressure port diameter is determined according to pressure unit 1 model specification, the outlet of tested turbo flow meter 2 is connected with rear straight pipeline by flange, on front straight pipeline, the distance of distance tested turbo flow meter 2 entrance point 1DN bores a pressure port by flexible pipe connection differential pressure transmitter 3 high-pressure side, on rear straight pipeline, the distance of distance tested turbo flow meter 2 endpiece 1DN bores a pressure port by flexible pipe connection differential pressure transmitter 3 low pressure end, pressure point is circular pressure port and bore diameter 6mm, differential pressure transmitter is used as the calculating of the measurement of the tested turbo flow meter pressure loss and differential flow.
Rear straight pipeline length meets the requirement being more than or equal to 5DN, rear straight pipeline is installed temperature transmitter 4, and the measuring position of temperature is apart from tested turbo flow meter 2 endpiece 2DN, and thermometer hole diameter is determined according to temperature transmitter 4 model specification.The pressure unit that tested turbo flow meter pipeline and standard turbine meter line upstream are afterwards installed, the temperature transmitter of downstream installation, all in order to the calculating of the correction and differential flow of carrying out operating mode flow.Pressure unit in addition on tested turbo flow meter pipeline is consistent with the pressure unit on standard turbine meter pipeline and temperature transmitter model specification with temperature transmitter.
Rear straight pipeline outlet is connected with hand valve 5 import by flange, hand valve 5 is exported and is connected with the first header 6 import by adapter flange, the outlet of the first header 6 connects two branch roads, be respectively the first branch road and the second branch road, first, second branch road is all that the first header 6 is exported and is connected with front straight pipeline by flange, setting pressure transmitter on front straight pipeline, front straight pipeline outlet is connected with standard turbine meter 7 import by flange, standard turbine meter 7 is exported and is connected with rear straight pipeline by flange, rear straight pipeline installs temperature transmitter, rear straight pipeline outlet is connected with hand valve import by flange, hand valve outlet is connected with the second header 8 import by flange.Hand valve 5 and hand valve are afterwards all in order to select the opening and closing of different measuring pipeline to close, such as when selection is opened hand valve 5 and closed hand valve 5-1 and hand valve 5-2, select to open the first branch road according to the flow range of tested turbo flow meter or the second branch road can measure heavy caliber flow (DN80 or DN100).But when selecting closed hand valve 5 open hand valve 5-1 and hand valve 5-2, select to open the first branch road according to the flow range of tested turbo flow meter or the second branch road can measure small-bore flow (DN50).In addition when not special proposition adapter flange, the flange caliber in system is all consistent with pipe diameter and flowmeter bore.Except hand valve 5 caliber is that except DN80 or DN100, other are DN50.
Second header 8 is exported and is connected with flow control valve 9 import by flange, and flow control valve 9 is exported and is connected with blower fan 10 import by hard flexible pipe, and blower fan 10 exports and leads directly to air as gas outlet.By blower fan as negative pressure source, because pipeline leads directly to air, can obtain stable source of the gas, and system architecture is relatively simple, small investment, energy consumption is low and monitoring efficiency is higher.Power supply is received on blower motor through frequency converter 11.The high-pressure frequency-conversion blower fan 10 that bleed pressure is controlled by frequency converter 11 produces.Because this device is when examining and determine tested turbo flow meter or calibrate monitoring, test for its a certain flow point, this makes measurement mechanism must can produce stable, normal flow accurately, but this is not only relevant with device flow regulation actuator, also relevant with the flow regulation algorithm in apparatus control system.The flow regulation pattern that this device adopts fan frequency conversion speed governing to combine with variable valve by flow regulation mode, because flow regulation pattern has fast, accurate, overshoot is little and energy-conservation for this reason.Pid control algorithm is adopted to regulate by flow regulation control algolithm, because this apparatus control system parameter is more, mathematical models is unknown, so be applicable to this algorithm.
When calibrating or calibration monitoring, first tested turbo flow meter passage is chosen according to the flow point of setting, then the switch valve of respective channel is opened, other standards turbo flow meter channel valve acquiescence is in closed condition, flow regulation valve opening is set, startup frequency converter 11 controls high-pressure frequency-conversion blower fan 10 and carries out flow regulation, gas in the past straight pipeline entrance enters, successively by tested turbo flow meter 2 or tested turbo flow meter 2-1, hand valve 5, first header 6, standard turbine meter 7 or standard turbine meter 7-1, second header 8, flow control valve 9, finally discharge from blower fan 10, after setting flow point, timing is started until standard turbine meter stability of flow, carry out step-by-step counting simultaneously, meanwhile tested turbo flow meter also adopts synchronizing pulse counting method carry out step-by-step counting and monitor timing, because turbo flow meter unit volume flow pulse number is constant, the instantaneous delivery of tested turbo flow meter can be calculated according to umber of pulse in the unit interval.To blind off a line system after calibrating or calibration period terminate, respective volumetric flow rate is calculated by tested turbo flow meter and standard turbine meter umber of pulse, read and record pressure unit, temperature transmitter and differential pressure variator current data and go out instantaneous delivery in conjunction with the basic parameter of every platform turbo flow meter according to differential flow models fitting curve and formulae discovery simultaneously, draw with it the metering performance of tested turbo flow meter more afterwards.The volumetric flow rate under respective operating mode is calculated in addition by the pulsimeter of standard turbine meter and tested turbo flow meter, then the flow be converted under the status of criterion is compared, wherein standard turbo flow value needs to revise according to its discharge characteristic usually, then draws the performance parameters such as the coefficient of flow of tested turbo flow meter, flow error, crushing loss, differential flow curve, the linearity and repeatability.
Fig. 3 is turbo flow meter on-line monitoring device data acquisition control system schematic diagram.
Because PLC has high-speed counting mouth, the exportable pulse signal up to 100kHz, easily extensible A/D module and communication module, program write and erasing can be realized, for control program on-line debugging is provided convenience, so this device slave computer by PLC as controller, with GXdeveloper software programming slave computer ladder diagram, be responsible for the output of data acquisition and control signal, communicated with host computer by FX3G-485BD communication module, perform host computer and send instruction, be responsible for standard turbine meter and tested turbo flow meter step-by-step counting and calibrating or calibrate monitoring timing, the data acquisition of temperature, pressure differential pressure, pipe valve switch control rule, blower fan frequency adjustment etc.
As shown in Figure 3, this device adopts Mitsubishi PLC FX3GA-24MT-CM as main control unit, and all control of system and data acquisition function realize by PLC and peripheral circuit module.Input change-over circuit by AD the electric current of 4-20mA be converted to the voltage of 1-5V and then ensure that FX2N-4AD reads standard turbine meter and the instantaneous delivery of tested turbo flow meter and temperature value, the force value of pressure unit, the differential pressure value of differential pressure variator of temperature transmitter; Utilize the value of D/A module to frequency converter and flow control valve to control, the input request signal 4-20mA of frequency converter and flow control valve, directly adopt FX2N-4DA to control frequency converter and flow control valve.
Peripheral circuit comprises dual time method circuit, AD inputs change-over circuit and output valve driving circuit, and dual time method circuit meets the input requirements of PLC based on the pulse value that dual-time impulse method calculates turbo flow meter exactly simultaneously.AD inputs change-over circuit and realizes 4-20mA circuit to the conversion of 1-5V voltage and increase overvoltage crowbar, makes system reliable and stable.Output valve driving circuit improves PLC output driving current, ensures the electric current needed for switch valve.
In the contact of data acquisition system (DAS) and supervisory system, FX3G-485BD communication module will realize the communication of supervisory system and PLC, completes Long-distance Control and data acquisition.Finally realize that assay calibration monitoring flow process controls automatically, temperature and pressure data acquisition, the function such as valve switch controls, flow regulates automatically, data processing and report generation.
Data acquisition control system allocation list
| Sequence number | Device name | Specification | Unit | Quantity |
| 1 | PLC | Mitsubishi FX3GA-24MT-CM | Individual | 1 |
| 2 | Input circuit | Dual time method circuit | Road | 4 |
| 3 | Output circuit | Output driving circuit | Road | 6 |
| 4 | Analog input mModule | Mitsubishi FX2N-4AD | Individual | 4 |
| 5 | Analog output module | Mitsubishi FX2N-4DA | Individual | 2 |
| 6 | Communication module | FX3G-485BD | Individual | 1 |
| 7 | Programming software | LabVIEW | Cover | 1 |
Supervisory system host computer completes and writes under the environment of WindowsMicrosoftVisualStudio2008, is responsible for the functions such as assay calibration flow monitoring, data acquisition, database access, data processing and form.For realizing efficient technical management and instruction issuing, enough excellent for supervisory system outfit performance, and the PC that independent IP can be used to surf the Net uses as server, and want server running environment to be .netframework, design philosophy can be continued to use theory that is top-down, zone-by-zone analysis.
Below enumerate the main application program of turbo flow meter on-line monitoring device and the function of realization.
Fault diagnostic program: after obtaining accurate data information, to be merged it by fault diagnostic program and be analyzed, and contrast with the canonical parameter in diagnosis problem storehouse, thus diagnose out the running status of current turbine flowmeter whether good, mechanism that fault produces etc.If fault belongs to the aberrations in property of general class, diagnostic system can give a warning, and requires that user carries out simple equipment debugging in accordance with the adjustment method provided; If fault is comparatively serious, extent of deviation is comparatively large, and diagnostic system then comprehensively can be analyzed the key message in the data collected and turbo flow meter self-inspection data and technology consultation storehouse, thus determines that rear removable parts occur fault.After completion of the above process, reresent user and keep in repair by the method for specifying, in this flow process, achieve determining to provide and solve the overall technology support of failure measure turbo flow meter fault type.
State Monitoring Program: in order to reduce the operating fault burst rate of turbo flow meter, will the duty of utilization state watchdog routine to turbo flow meter reasonably arrange, the manipulation to all kinds of transmitter is realized with instrument drivers, instrument and equipment is carried out to the setting of technical parameter, the operation of trigger data collection work.Obtaining just to monitor in real time the running status of turbo flow meter after data processed result accurately, adopt measures in time to be safeguarded the stable operation of turbo flow meter.
Data administrator: for making online monitoring system carrying out having reliable foundation and technical standard during daily monitoring is safeguarded, appropriate maintenance and management need be carried out to principle knowledge storehouse and standard database.Standard database, is turbine flow and takes into account the technical parameter that internal sensor etc. reaches needed under proper testing environment, for reaching conditions dictate when monitoring and diagnosis, also needs to carry out specification to the technical parameter under its init state.Data administrator can complete such task, historical test data can be carried out unified management, formulates normalizing parameter setting, thus realizes the Correct Analysis to test data.Principle knowledge storehouse manages the performance under turbine flow normal condition and abnormality and relevant information, forms the foundation judging turbo flow meter fault type.In whole workflow, what this system played is the functions such as collection, arrangement and storage.
The present invention, by overhauling the analysis of means to turbo flow meter on-line monitoring and this emerging turbo flow meter of fault diagnosis system, points out that on-line monitoring and control is to the positive role on turbo flow meter performance and state-maintenance.The present invention carries out research to online turbo flow meter monitoring and fault diagnosis system from this three large important component part of system global structure, data acquisition system (DAS) and supervisory system and sums up, experiment proves that the method for work of this system and security maintenance effect reach the effect of reality, the online monitoring system industrial automation control system based on PLC, automatically can realize the functions such as the Row control such as assay calibration monitoring, temperature and pressure data acquisition, valve switch control, flow regulation, data processing and report generation.Can the monitoring result of accurate stable, man-machine interface be supplied friendly by Quick, monitor procedure simple and effective.
Claims (4)
1. turbo flow meter on-line monitoring device, comprises blower fan, flow control valve, standard turbine meter, the first header and the second header, it is characterized in that:
Before first, straight pipeline is connected by the tested turbo flow meter import of flange and heavy caliber, before this first straight pipeline installs principal pressure transmitter, the outlet of the tested turbo flow meter of heavy caliber is connected with straight pipeline after first by flange, before first, on straight pipeline, the distance of distance heavy caliber tested turbo flow meter entrance point 1DN is bored a pressure port and is connected the first differential pressure transmitter high-pressure side by flexible pipe, on straight pipeline, the distance of distance heavy caliber tested turbo flow meter endpiece 1DN is bored a pressure port and is connected the first differential pressure transmitter low pressure end by flexible pipe after first, after this first straight pipeline installs main temperature transmitter, rear straight pipeline outlet is connected with main hand valve import by flange,
Main hand valve outlet is connected with the first header import by adapter flange, and the outlet of the first header connects two branch roads, is respectively the first branch road and the second branch road; First branch road is identical with the second branch structure, includes standard turbine meter, from hand valve, from temperature transmitter with from pressure unit; Wherein standard turbine meter import exports with the first header and is connected; Being arranged on standard turbine meter and the first header from pressure unit exports between the pipeline that is connected; Standard turbine meter exports manually valve and is connected with the second header import, is arranged between the pipeline that standard turbine meter is connected with the second header import from temperature transmitter;
Second header outlet is connected with flow control valve import, and flow regulation valve outlet port is connected with fan inlet by hard flexible pipe, and fan outlet leads directly to air as gas outlet.
2. turbo flow meter on-line monitoring device according to claim 1, is characterized in that: the branch road also comprising small-bore tested turbo flow meter test, the first hand valve import in this branch road is communicated with air, first manual valve outlet port is connected with straight pipeline before second by flange, straight pipeline is installed the first pressure unit before second, before second, straight pipeline outlet is connected with small-bore tested turbo flow meter import by flange, the outlet of small-bore tested turbo flow meter is connected with straight pipeline after second by flange, before second, on straight pipeline, the distance of the small-bore tested turbo flow meter entrance point 1DN of distance is bored a pressure port and is connected the second differential pressure transmitter high-pressure side by flexible pipe, on straight pipeline, the distance of the small-bore tested turbo flow meter endpiece 1DN of distance is bored a pressure port and is connected the second differential pressure transmitter low pressure end by flexible pipe in the second rear, after this second straight pipeline installs the first temperature transmitter, after first, straight pipeline outlet is connected with the first header import by the second hand valve.
3. turbo flow meter on-line monitoring method, uses the device described in claim 1, it is characterized in that:
First tested turbo flow meter passage is chosen according to the flow point of setting, then the switch valve of respective channel is opened, other standards turbo flow meter channel valve acquiescence is in closed condition, flow regulation valve opening is set, start Frequency Converter Control high-pressure frequency-conversion blower fan and carry out flow regulation, gas enters from straight pipeline entrance before first, successively by tested turbo flow meter, main hand valve, the first header, standard turbine meter, the second header, flow control valve, finally discharge from blower fan;
After setting flow point, timing is started until standard turbine meter stability of flow, carry out step-by-step counting simultaneously, meanwhile tested turbo flow meter also adopts synchronizing pulse counting method carry out step-by-step counting and monitor timing, because turbo flow meter unit volume flow pulse number is constant, calculate the instantaneous delivery of tested turbo flow meter according to umber of pulse in the unit interval;
To blind off a line system after calibrating or calibration period terminate, respective volumetric flow rate is calculated by tested turbo flow meter and standard turbine meter umber of pulse, read and record pressure unit, temperature transmitter and differential pressure variator current data, basic parameter simultaneously in conjunction with every platform turbo flow meter goes out instantaneous delivery according to differential flow models fitting curve and formulae discovery, draws with it the metering performance of tested turbo flow meter more afterwards.
4. turbo flow meter on-line monitoring method according to claim 3, it is characterized in that: also calculated the volumetric flow rate under respective operating mode by the pulsimeter of standard turbine meter and tested turbo flow meter, then the flow be converted under the status of criterion is compared, wherein standard turbo flow value needs to revise according to its discharge characteristic, then draws the coefficient of flow of tested turbo flow meter, flow error, crushing loss, differential flow curve, the linearity and repeatability.
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| CN106871978A (en) * | 2017-03-31 | 2017-06-20 | 上海科洋科技股份有限公司 | A kind of online suitching type metering sled |
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| CN111854860A (en) * | 2019-04-26 | 2020-10-30 | 中国石油天然气股份有限公司 | Natural gas flowmeter calibrating device and method |
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| CN112204357A (en) * | 2018-05-30 | 2021-01-08 | 引能仕株式会社 | Flowmeter failure diagnosis method for meter and hydrogen filling device |
| CN111854861A (en) * | 2019-04-26 | 2020-10-30 | 中国石油天然气股份有限公司 | Natural gas flowmeter calibration method and device |
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| CN112729487A (en) * | 2020-12-28 | 2021-04-30 | 中国航天空气动力技术研究院 | Test calibration system and method for precession vortex flowmeter |
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