CN107677342A - Natural gas flowmeter verification system - Google Patents
Natural gas flowmeter verification system Download PDFInfo
- Publication number
- CN107677342A CN107677342A CN201610625734.8A CN201610625734A CN107677342A CN 107677342 A CN107677342 A CN 107677342A CN 201610625734 A CN201610625734 A CN 201610625734A CN 107677342 A CN107677342 A CN 107677342A
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- China
- Prior art keywords
- natural gas
- gas flowmeter
- pressure
- temperature
- critical flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The present invention provides a kind of natural gas flowmeter verification system, its critical flow nozzle device is standard measurement device, and by its transmitting measured values to block combiner, electronic air extracting pump provides source of the gas, extract the gas of stagnation container, make it have certain vacuum, temperature at block combiner collection stagnation container position, temperature at pressure and humidity and natural gas flowmeter checklist, pressure, and transmit a signal to PLC processor and handled and participate in flow error calculating, PLC processor is by the temperature after processing, pressure, the transmitting measured values of humidity value and the revised critical flow nozzle device give the supervisory controller, the supervisory controller shows the information that the PLC processor transmits.The natural gas flowmeter verification system has flexible, general；Reliability is high, strong antijamming capability；Using simple；The advantages that function is strong, small volume.
Description
Technical field
The present invention relates to metering device technical field, especially relates to a kind of natural gas flowmeter verification system.
Background technology
With the development of gas industry, the gage work of natural gas is increasingly subject to the attention of departments at different levels, and this is with regard to convection current
The calibration operation of gauge proposes higher requirement.Traditional natural gas flowmeter calibrating mode, because the accuracy of measuring is difficult to
Ensure, efficiency is low and the problems such as complex operation, do not adapted to the needs of modern gas industry metering much.For this, we send out
Understand a kind of new natural gas flowmeter verification system, solve above technical problem.
The content of the invention
It is an object of the invention to provide a kind of natural gas flowmeter verification system, using electronic technology and automatic technology
Combined design, efficiently against or avoid shortcoming present in prior art or deficiency.
The purpose of the present invention can be achieved by the following technical measures：Natural gas flowmeter verification system, the natural gas flow
Gauge verification system includes critical flow nozzle device, electronic air extracting pump, block combiner, PLC processor and supervisory controller, should
Critical flow nozzle device is arranged on stagnation container, and natural gas flowmeter checklist is cascaded with stagnation container, and this is critical
Flow nozzle device is standard measurement device, and gives its transmitting measured values to the block combiner, and the electronic air extracting pump is connected to this and faced
Boundary's flow nozzle device, and source of the gas is provided, the gas of stagnation container is extracted, certain vacuum is made it have, in atmospheric pressure masterpiece
Under, gas flows through natural gas flowmeter checklist, the critical flow nozzle device, the electronic air extracting pump and enters air, the module
Combination is connected to natural gas flowmeter checklist, the electronic air extracting pump and the critical flow nozzle device, gathers stagnation container position
Temperature, pressure at temperature, pressure and the humidity and natural gas flowmeter checklist at place, and transmit a signal to the PLC processing
Device is handled and participates in flow error calculating, and the PLC processor is connected to the block combiner, and by the temperature after processing, pressure
The transmitting measured values of power, humidity value and the revised critical flow nozzle device give the supervisory controller, the host controller
Machine is connected to the PLC processor and shows the information that the PLC processor transmits.
The purpose of the present invention can be also achieved by the following technical measures：
The PLC processor compares the gas that natural gas flowmeter checklist and the critical flow nozzle device are flowed through in a period of time
Body flow, calculate the error in dipping and repeatability of natural gas flowmeter checklist.
The block combiner includes temperature transmitter, pressure transmitter, No. 3 temperature transmitters, 1 road humidity transmitter and 3 tunnels
Pressure transmitter, the temperature transmitter are connected to natural gas flowmeter checklist, measure the temperature at natural gas flowmeter checklist
Degree, the pressure transmitter are connected to natural gas flowmeter checklist, measure the pressure at natural gas flowmeter checklist, 3 tunnel
Temperature transmitter is connected to the critical flow nozzle device, measures the temperature of stagnation container, and the 1 road humidity transmitter is connected to this and faced
Boundary's flow nozzle device, the humidity of stagnation container is measured, No. 3 pressure transmitter is connected to the critical flow nozzle device, and measurement is stagnant
The only pressure of container.
The block combiner also includes solenoid valve control module, and the solenoid valve control module is connected to the electronic air extracting pump, passes
The defeated PLC processor gives the signal instruction of the electronic air extracting pump, controls the opening and closing of the electronic air extracting pump.
The block combiner also includes Power Monitoring Unit and reseting module, and the Power Monitoring Unit is connected to the PLC processing
Whether device, the supply voltage for monitoring the PLC processor are stablized, and in voltage instability timing, send alarm signal, the reseting module connects
The PLC processor is connected to, when the PLC processor breaks down and can not operated, manually can be answered the PLC processor
Position.
The block combiner also includes A/D modular converters, the A/D modular converters will gather temperature at stagnation container position,
Temperature, pressure data at pressure and humidity and natural gas flowmeter checklist are transferred to the PLC processing after carrying out A/D conversions
Device.
Natural gas flowmeter verification system in the present invention, by the use of PLC as main control module, by communicated with PC come
Realize the collection of the temperature, pressure and other parameters in natural gas flowmeter verification process and be shown in master system control interface,
The accuracy of measuring and efficiency are substantially increased, it is significant to examine and determine industrial expansion to gas metering.The system has
Flexibly, it is general；Reliability is high, strong antijamming capability；Using simple；The advantages that function is strong, small volume.According to actual requirement, sheet
The function that verification system can be realized includes：
1) to the real-time acquisition and display of field working conditions parameter (unit temp, pressure, humidity, flow, back pressure ratio).Work as spray
When mouth has gas leak phenomenon, host computer interface automatic spring yellow alarm dialog box, so as to staff's timely processing.
2) time, number of pulses can be examined and determine with sets itself, realizes frequency that is manual, automatically adjusting air pump.
3) linearity, error and repeatability are calculated according to the verification result of each flow point.
4) inquiry of historical data, and printable initial data and calibration certificate can be realized.
5) to selected flow point, system can Automatic Combined nozzle, meet corresponding flow value.
Brief description of the drawings
Fig. 1 is the structure chart of a specific embodiment of the natural gas flowmeter verification system of the present invention.
Embodiment
For enable the present invention above and other objects, features and advantages become apparent, it is cited below particularly go out preferable implementation
Example, and coordinate shown in accompanying drawing, it is described in detail below.
As shown in figure 1, Fig. 1 is the structure chart of the natural gas flowmeter verification system of the present invention.The system is mainly by critical
Flow nozzle device 1, electronic air extracting pump 2, block combiner 3, PLC processor 4, the part of supervisory controller more than 5 composition.
Critical flow nozzle device 1 is made up of one group of Nozzle combination, and on a stagnation container, it is exported by 304 not
Rust steel conduit is connected with electronic air extracting pump 2, and checklist is cascaded by 304 stainless steel pipes and stagnation container.Critical flow
Spray nozzle device 1 is standard measurement device, and its measured value transmission module is combined into 3.
PLC processor 4 flows through the gas flow of checklist and critical flow nozzle device 1 by comparing in a period of time, enter
And calculate the error in dipping and repeatability of natural gas flowmeter.
Electronic air extracting pump 2 is connected to critical flow nozzle device 1, there is provided source of the gas, extracts the gas of stagnation container, makes it have
Certain vacuum, under atmospheric pressure effect, gas flows through checklist, critical flow nozzle device 1, electronic air extracting pump 2 and entered
Air.
Block combiner 3 includes temperature transmitter 31, pressure transmitter 32, No. 3 temperature transmitters 33,1 tunnel humidity pick-up
Device 34, No. 3 pressure transmitters 35, solenoid valve control module 36, Power Monitoring Unit 37 and reseting module 38.Temperature transmitter 31
Checklist is connected to, measures the temperature at checklist.Pressure transmitter 32 is connected to checklist, measures the pressure at checklist.3
Road temperature transmitter 33 is connected to critical flow nozzle device 1, measures the temperature of stagnation container.1 road humidity transmitter 34 is connected to
Critical flow nozzle device 1, measure the humidity of stagnation container.No. 3 pressure transmitters 35 are connected to critical flow nozzle device 1, measurement
The pressure of stagnation container.Solenoid valve control module 36 is connected to electronic air extracting pump 2, and transmission PLC processor 4 gives electronic air extracting pump 2
Signal instruction, control electronic air extracting pump 2 opening and closing.Power Monitoring Unit 37 is connected to PLC processor 4, main to monitor at PLC
Whether the supply voltage of reason device 4 is stablized, and in voltage instability timing, sends alarm signal.Reseting module 38 is connected to PLC processor
4, when PLC processor 4 breaks down and can not operated, PLC processor 4 can be resetted manually.
In verification process, temperature transmitter, pressure transmitter, the humidity transmitter of block combiner 3 gather stagnation appearance respectively
Temperature, pressure and the humidity of device opening position and temperature, the pressure being calibrated at instrument, signal is transmitted by A/D modular converters
Handled to PLC processor 4 and participate in flow error calculating, PLC processor 4 is turned temperature after RS485 signals are changed by USB
Degree, pressure, humidity value and revised actual flow value (i.e. the measured value of critical flow nozzle device 1) are shown in supervisory controller
5.By supervisory controller 5 can realize instantaneous delivery show, pressure and temp humidity display, the motor operation shape of electronic air extracting pump 2
State is shown, data storage and calling.
This verification system is that checklist is examined and determine, calibrated based on critical flow nozzle device 1 operationally, control system
System is by supervisory controller 5 and the composition control unit of PLC processor 4.First, the bore of checklist is selected, simultaneity factor will be certainly
Dynamic selection Nozzle combination, manual actuation electronic air extracting pump 2, and adjust the frequency of the motor of electronic air extracting pump 2.When checklist frequency reaches
To stationary value, i.e., when nozzle reaches critical flow, start to examine and determine checklist.In verification process, automated system operation is simultaneously real
When supervisory controller 5 is transmitted to by temperature, pressure acquisition module, shown in the certain position of control interface, acquisition time interval
For 600ms.After calibrating terminates, the printing certificate of competency may be selected or unqualified notice, the calibrating data of checklist automatically save
Under the file directory of setting, so as to later inquiry and calling.It is man-machine that whole process only needs operating personnel to be carried out with host computer
Dialogue, realizes application of the automatic technology in Measurement Verification Work.
This verification system automaticity is high, electronic technology be combined with sensing technology make system have higher precision with
Reliability, it can more accurately carry out transmission of quantity value.Host computer operation interface is abundant, directly perceived, succinct, and staff can be by original
Three people be reduced to two people, not only save manpower, and operating efficiency greatly improves, and has good economic benefit and society
Benefit.
Claims (6)
1. natural gas flowmeter verification system, it is characterised in that the natural gas flowmeter verification system fills including critical flow nozzle
Put, electronic air extracting pump, block combiner, PLC processor and supervisory controller, the critical flow nozzle device are arranged on stagnation container
On, natural gas flowmeter checklist is cascaded with stagnation container, and the critical flow nozzle device is standard measurement device, and will
Its transmitting measured values gives the block combiner, and the electronic air extracting pump is connected to the critical flow nozzle device, and provides source of the gas, extracts stagnant
The only gas of container, certain vacuum is made it have, under atmospheric pressure effect, gas flows through natural gas flowmeter and is detected
Table, the critical flow nozzle device, the electronic air extracting pump enter air, and the block combiner is connected to natural gas flowmeter checklist,
The electronic air extracting pump and the critical flow nozzle device, gather temperature, pressure and humidity and natural gas flow at stagnation container position
Temperature, pressure at gauge checklist, and transmit a signal to the PLC processor and handled and participate in flow error calculating,
The PLC processor is connected to the block combiner, and the temperature after processing, pressure, humidity value and the revised critical flow are sprayed
The transmitting measured values of mouth device give the supervisory controller, and the host controller machine is connected to the PLC processor and shows the PLC
The information that processor transmits.
2. natural gas flowmeter verification system according to claim 1, it is characterised in that the PLC processor compares one section
The gas flow of natural gas flowmeter checklist and the critical flow nozzle device is flowed through in time, natural gas flowmeter is calculated and is detected
The error in dipping and repeatability of table.
3. natural gas flowmeter verification system according to claim 1, it is characterised in that the block combiner becomes including temperature
Device, pressure transmitter, No. 3 temperature transmitters, 1 road humidity transmitter and No. 3 pressure transmitters, the temperature transmitter is sent to be connected to
Natural gas flowmeter checklist, measures the temperature at natural gas flowmeter checklist, and the pressure transmitter is connected to natural gas flow
Gauge checklist, measures the pressure at natural gas flowmeter checklist, and No. 3 temperature transmitter is connected to critical flow nozzle dress
Put, measure the temperature of stagnation container, the 1 road humidity transmitter is connected to the critical flow nozzle device, measures the wet of stagnation container
Degree, No. 3 pressure transmitter are connected to the critical flow nozzle device, measure the pressure of stagnation container.
4. natural gas flowmeter verification system according to claim 3, it is characterised in that the block combiner also includes electromagnetism
Valve control module, the solenoid valve control module are connected to the electronic air extracting pump, transmit the PLC processor to the electronic air extracting pump
Signal instruction, control the opening and closing of the electronic air extracting pump.
5. natural gas flowmeter verification system according to claim 3, it is characterised in that the block combiner also includes power supply
Monitoring module and reseting module, the Power Monitoring Unit are connected to the PLC processor, monitor the supply voltage of the PLC processor
Whether stablize, in voltage instability timing, send alarm signal, the reseting module is connected to the PLC processor, in the PLC processing
Device breaks down when can not be operated, and manually can be resetted the PLC processor.
6. natural gas flowmeter verification system according to claim 3, it is characterised in that the block combiner also includes A/D
Temperature, pressure and humidity at collection stagnation container position and natural gas flowmeter are detected by modular converter, the A/D modular converters
Temperature, pressure data at table are transferred to the PLC processor after carrying out A/D conversions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610625734.8A CN107677342A (en) | 2016-08-01 | 2016-08-01 | Natural gas flowmeter verification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610625734.8A CN107677342A (en) | 2016-08-01 | 2016-08-01 | Natural gas flowmeter verification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107677342A true CN107677342A (en) | 2018-02-09 |
Family
ID=61133483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610625734.8A Pending CN107677342A (en) | 2016-08-01 | 2016-08-01 | Natural gas flowmeter verification system |
Country Status (1)
| Country | Link |
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| CN (1) | CN107677342A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682435A (en) * | 2019-01-18 | 2019-04-26 | 成都秦川物联网科技股份有限公司 | Pressure volume modification method, electronic equipment and storage medium |
| CN110174162A (en) * | 2019-05-13 | 2019-08-27 | 南京罕华流体技术有限公司 | A kind of industry measurement operating condition calibrating installation |
| CN110220576A (en) * | 2019-07-25 | 2019-09-10 | 浙江裕顺仪表有限公司 | A kind of efficient gas flow standard device that can examine and determine more flowmeters simultaneously |
| CN112808051A (en) * | 2019-11-18 | 2021-05-18 | 中国石油天然气股份有限公司 | Mixer and flowmeter calibration method |
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| CN101251405A (en) * | 2008-04-08 | 2008-08-27 | 朱家顺 | Apparatus for calibrating gas instrument |
| CN202501910U (en) * | 2012-03-30 | 2012-10-24 | 杭州市质量技术监督检测院 | Calibrating device for heavy caliber gas flow |
| CN104215305A (en) * | 2013-06-04 | 2014-12-17 | 宁夏嘉翔自控技术有限公司 | Full-automatic supersonic nozzle high flow standard device |
| CN104501917A (en) * | 2015-01-04 | 2015-04-08 | 镇江市计量检定测试中心 | Ultra-large diameter sonic nozzle block type gas flowmeter calibrating device |
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2016
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101251405A (en) * | 2008-04-08 | 2008-08-27 | 朱家顺 | Apparatus for calibrating gas instrument |
| CN202501910U (en) * | 2012-03-30 | 2012-10-24 | 杭州市质量技术监督检测院 | Calibrating device for heavy caliber gas flow |
| CN104215305A (en) * | 2013-06-04 | 2014-12-17 | 宁夏嘉翔自控技术有限公司 | Full-automatic supersonic nozzle high flow standard device |
| CN104501917A (en) * | 2015-01-04 | 2015-04-08 | 镇江市计量检定测试中心 | Ultra-large diameter sonic nozzle block type gas flowmeter calibrating device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682435A (en) * | 2019-01-18 | 2019-04-26 | 成都秦川物联网科技股份有限公司 | Pressure volume modification method, electronic equipment and storage medium |
| CN110174162A (en) * | 2019-05-13 | 2019-08-27 | 南京罕华流体技术有限公司 | A kind of industry measurement operating condition calibrating installation |
| CN110174162B (en) * | 2019-05-13 | 2020-12-29 | 南京罕华流体技术有限公司 | Working condition calibration device for industrial metering |
| CN110220576A (en) * | 2019-07-25 | 2019-09-10 | 浙江裕顺仪表有限公司 | A kind of efficient gas flow standard device that can examine and determine more flowmeters simultaneously |
| CN112808051A (en) * | 2019-11-18 | 2021-05-18 | 中国石油天然气股份有限公司 | Mixer and flowmeter calibration method |
| CN112808051B (en) * | 2019-11-18 | 2022-07-05 | 中国石油天然气股份有限公司 | Mixer and flowmeter calibration method |
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Application publication date: 20180209 |