CN112484822A - Loop flow calibrating device - Google Patents

Loop flow calibrating device Download PDF

Info

Publication number
CN112484822A
CN112484822A CN202011550853.4A CN202011550853A CN112484822A CN 112484822 A CN112484822 A CN 112484822A CN 202011550853 A CN202011550853 A CN 202011550853A CN 112484822 A CN112484822 A CN 112484822A
Authority
CN
China
Prior art keywords
flow
meter
circulating fan
standard
detected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011550853.4A
Other languages
Chinese (zh)
Inventor
林亮
沈一群
汪超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanjing Yingnuo Measurement And Control Technology Co ltd
Original Assignee
Nanjing Yingnuo Measurement And Control Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nanjing Yingnuo Measurement And Control Technology Co ltd filed Critical Nanjing Yingnuo Measurement And Control Technology Co ltd
Priority to CN202011550853.4A priority Critical patent/CN112484822A/en
Publication of CN112484822A publication Critical patent/CN112484822A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • G01F25/15Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters specially adapted for gas meters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/12Cleaning arrangements; Filters
    • G01F15/125Filters

Abstract

The invention provides a loop flow calibrating device which comprises a circulating fan, a temperature control system, a standard meter station, a tested meter station and a filter, wherein the filter is sequentially connected in series by pipelines according to the air outlet direction of the circulating fan to form a closed loop; the standard meter station comprises a switch valve and a standard flow meter which are arranged in series; the detected meter station comprises a detected flowmeter with switch valves arranged at two ends in series, the circulating fan drives the medium in the calibrating device to flow, the flow of different flow points is provided for the whole loop calibrating device, and the detected flowmeter can still be subjected to real-flow calibration under the condition that the circulating fan is not required to be butted to a gas actual pipeline main line.

Description

Loop flow calibrating device
Technical Field
The invention relates to the field of fluid measurement and verification, in particular to a loop flow verification device.
Background
In order to realize the verification of the flow meters under different temperature, pressure and medium conditions, taking natural gas as an example, the verification conditions are usually realized by adjusting pressure, adjusting temperature and adjusting flow after a natural gas long-distance pipeline is cut off, and then gas is returned to the natural gas long-distance pipeline after verification is finished, but in the actual operation process, because of the influences of safety, environment, production scheduling and the like of a high-pressure natural gas station, the verification cost is very high, the cost of a conventional natural gas real-current verification station is over hundred million yuan, the pressure in the pipeline after a trunk line is cut off in the detection process is very difficult to achieve an ideal detection state, other equipment in the pipeline can be polluted by oil of the flow meters in the pipeline in the detection process, so a low-cost flow verification device with stable internal measurement and control environment and adjustable flow rate is urgently needed.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a loop flow calibrating device.
In order to achieve the purpose, the invention adopts the following technical scheme:
a loop flow calibrating device comprises a circulating fan, a temperature control system, a standard meter station, a tested meter station and a filter, wherein the circulating fan, the temperature control system, the standard meter station, the tested meter station and the filter are sequentially connected in series through pipelines according to the air outlet direction of the circulating fan to form a closed loop; the standard meter station comprises a switch valve and a standard flow meter which are arranged in series; the detected meter station comprises a detected flow meter with switch valves arranged at two ends in series, the circulating fan drives the medium in the calibrating device to flow, the flow of different flow points is provided for the whole loop calibrating device, and the detected flow meter can still be calibrated under the condition that the circulating fan is not required to be butted to a gas actual pipeline main line.
The filter purifies the flow in the loop pipeline, keeps the interior of the pipeline clean, and prevents the flowmeter from being polluted.
Further, the temperature control system comprises a heat exchanger and a circulating cooling system, wherein the heat exchanger is mainly used for stabilizing the temperature of the medium in the loop; the circulating cooling system mainly adjusts the flow of the cooling liquid entering the heat exchanger in real time according to the temperature of media at the inlet and the outlet of the heat exchanger.
Furthermore, the circulating fan is also provided with a bypass flow pipeline in parallel, the bypass flow pipeline comprises a bypass flowmeter and a regulating valve which are arranged in series, the circulating fan is used for simulating the flow of natural environment flow, but the circulating fan has surge during low-frequency operation, and the bypass flow pipeline is used for fixing the flow of a flow dividing part, so that the circulating fan does not need to use low frequency and can obtain small flow or micro flow.
Furthermore, the standard meter stations can be connected in parallel to set the number of the standard meter stations larger than or equal to 1, a plurality of standard flowmeters are connected in parallel, and the plurality of flowmeters can be combined to accurately detect the flow rate when the flow rate is large.
Furthermore, the standard meter stations are also serially connected with a check flowmeter to check the flow rate and ensure the flow rate measurement accuracy.
Furthermore, the detected meter stations can be connected in parallel with more than or equal to 1, only one caliber of the detected meter station is used in one detection process, and the detected flow meters of a plurality of detected meter stations can be rapidly detected.
Further, the standard flowmeter, the detected flowmeter and the checking flowmeter are respectively provided with a pressure transmitter on the standard flowmeter, the detected flowmeter and the checking flowmeter, and are connected with a temperature transmitter in series to detect the temperature and the pressure of each flowmeter in the loop.
Compared with the prior art, the invention has the beneficial effects that: in the flow verification process, the to-be-detected flow meter does not need to be grafted to a cut natural gas long-distance pipeline, the circulating fan in the closed loop drives a medium in the loop verification device to flow, the flow of different flow points is provided for the whole loop verification device, the filter in the closed loop also prevents the to-be-detected flow meter from polluting or damaging parts in the pipeline, and the low-cost and low-pollution flow verification process is realized; the design of the bypass flow pipeline overcomes the surging of the circulating fan at low frequency, so that the circulating fan avoids the frequency region of surging work, and the flow of an ideal value can be obtained in a closed loop.
Drawings
FIG. 1 is a schematic circuit diagram of embodiment 1 of the present invention;
FIG. 2 is a partial schematic view of embodiment 1 of the present invention;
description of reference numerals: 1. the system comprises a circulating fan, 2, a temperature control system, 21, a heat exchanger, 22, a circulating cooling system, 3, a standard meter station, 31, a standard flowmeter, 4, a tested meter station, 41, a tested flowmeter, 5, a bypass flow pipeline, 51, a bypass flowmeter, 6, a tested flowmeter, 7, a filter, 81, a regulating valve, 82, a switch valve, 91, a flowmeter, 92, a pressure transmitter and 93, and a temperature transmitter.
Detailed Description
In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.
A loop flow calibrating device comprises a circulating fan 1, a temperature control system 2, a standard meter station 3, a tested meter station 4 and a filter 7, wherein the circulating fan 1, the temperature control system 2, the standard meter station 3, the tested meter station 4 and the filter 7 are sequentially connected in series through pipelines according to the air outlet direction of the circulating fan 1 to form a closed loop; the standard meter station 3 comprises a switching valve 82-1 and a standard flow meter 31 which are arranged in series; the tested meter station 4 comprises a tested flow meter 41 with two ends provided with a switch valve 82-2 and a switch valve 82-3 in series, and a circulating fan 1.
The flow path direction is not limited to clockwise and counterclockwise.
The reference flow meter 31, bypass flow meter 51, and verification flow meter 6 are all high precision flow meters, and are not limited to turbine flow meters, Roots flow meters, ultrasonic flow meters, or other flow meters; the flow meter 41 to be tested is a flow meter to be tested, and is not limited to a turbine flow meter, a roots meter, an ultrasonic flow meter or other flow meters.
The temperature control system 2 comprises a heat exchanger 21 and a circulating cooling system 22, the heat exchanger 21 is mainly used for stabilizing the temperature of a medium in a loop, and the circulating cooling system 22 is matched, and the circulating cooling system 22 is mainly used for adjusting the flow of a cooling liquid entering the heat exchanger 21 in real time according to the temperature of the medium at an inlet and an outlet of the heat exchanger 21, so that the work of the heat exchanger 21 is guaranteed.
However, in the loop flow verification device, when the circulating fan 1 provides flow at a low-frequency rotating speed, a surge phenomenon is generated, and the surge phenomenon can cause fatigue of internal parts of the circulating fan 1, cracks are generated, and the existing cracks are rapidly expanded.
The circulating fan 1 is also provided with a bypass flow pipeline 5 in parallel, and the bypass flow pipeline 5 comprises a bypass flowmeter 51 and a regulating valve 81 which are arranged in series.
In the concrete implementation, when the circulating fan 1 is at the low-speed rotating speed frequency of 0-5hz,the circulating fan 1 can generate surge phenomenon, and the corresponding circulating fan 1 provides flow of 0-1000 m at the rotating speed frequency of 0-5hz3H; setting the internal circulation flow required by the closed loop at the moment to be 800m3And/h, the circulating fan 1 directly provides flow for the closed loop, and the circulating fan 1 generates surge.
Then, at this point, 800m is required when the loop is closed3At flow/h, the rotating speed of the circulating fan 1 needs to overcome the rotating speed frequency of 0-5hz for surging phenomenon, namely, the rotating speed frequency is more than 1000m3Flow rate,/h; at this time, only the adjusting valve 81 of the bypass flow pipeline 5 needs to be adjusted to make the flow of the bypass flow pipeline 5 be 800m3The additional flow provided by the circulating fan 1 flows to the circulating fan 1 again through the bypass flow pipeline 5; if the standard table position 3 needs 800m3The flow is in a closed loop at/h, and when the standard flowmeter 31 detects the flow of 800m3At/h, the regulating valve 81 of the bypass flow line 5 can be adjusted, and the bypass flowmeter 51 detects 300m3H, the flow rate provided by the circulating fan 1 is 1100m3The rotating speed frequency is more than 5hz, the circulating fan 1 can not generate surge phenomenon, and the flow flowing to the closed pipeline through the standard meter station 3 can reach the preset 800m3/h。
The standard meter positions 3 can be also provided with the standard meter positions 3 with the number being more than or equal to 1 in parallel, the standard flowmeters 31 arranged on the standard meter positions 3 of the multiple parallel branches are high-precision flowmeters with the same caliber or different calibers, when the flow provided by the circulating fan 1 in the flow path is very large, the switch valve 82-1 in the standard meter positions can be opened, the standard meter positions 3 of the multiple parallel branches are opened at the same time, and the large flow provided by the circulating fan 1 is shared together.
The standard meter station 3 is also provided with a checking flowmeter 6 in series, the checking flowmeter 6 is a high-precision flowmeter with the same caliber or different calibers, checking is carried out while the standard flowmeter 31 detects, and errors are avoided.
The table positions 4 to be detected can also be provided with the table positions 4 to be detected with the number being more than or equal to 1 in parallel, the table positions 4 to be detected with single or multiple parallel branches are arranged, the number is determined according to the number of the flow meters 41 to be detected which need to be detected actually, but the flow meters 41 to be detected of the table positions 4 to be detected of one branch can only be used in one detection process, so that the detection effectiveness of the flow meters 41 to be detected is ensured; in the actual detection process, the switching valves 82-2 and 82-3 in all the branch detected table positions 4 except the detected table position 4 to be detected are only required to be closed.
The standard flowmeter 31, the detected flowmeter 41, the check flowmeter 6 and the bypass flowmeter 51 are connected in series with a temperature transmitter 93, and a pressure transmitter 92 is arranged on any flowmeter 91 in the pipeline so as to detect the temperature and the pressure of the flow medium in the current pipeline in real time.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.

Claims (7)

1. The utility model provides a loop flow calibrating installation which characterized in that: the device comprises a circulating fan, a temperature control system, a standard meter station, a tested meter station and a filter, wherein the circulating fan, the temperature control system, the standard meter station, the tested meter station and the filter are sequentially connected in series through pipelines according to the air outlet direction of the circulating fan to form a closed loop; the standard meter station comprises a switch valve and a standard flow meter which are arranged in series; the detected meter station comprises a detected flow meter with switch valves arranged at two ends in series.
2. The loop flow verification apparatus according to claim 1, wherein: the temperature control system includes a heat exchanger and a hydronic cooling system.
3. The loop flow verification apparatus according to claim 1, wherein: the circulating fan is further provided with a bypass flow pipeline in parallel, and the bypass flow pipeline comprises a bypass flowmeter and a regulating valve which are arranged in series.
4. The loop flow verification apparatus according to claim 1, wherein: the standard meter stations can be also provided with standard meter stations with the number more than or equal to 1 in parallel.
5. The loop flow verification apparatus according to claim 1, wherein: and the standard meter station is also provided with an inspection flowmeter in series.
6. The loop flow verification apparatus according to claim 1, wherein: the table positions to be detected can also be provided with the table positions to be detected in parallel, and the number of the table positions to be detected is more than or equal to 1.
7. The loop flow verification apparatus according to any one of claims 3 or 5, wherein: and the standard flowmeter, the detected flowmeter, the verification flowmeter and the bypass flowmeter are respectively provided with a pressure transmitter and are connected with a temperature transmitter in series.
CN202011550853.4A 2020-12-24 2020-12-24 Loop flow calibrating device Pending CN112484822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011550853.4A CN112484822A (en) 2020-12-24 2020-12-24 Loop flow calibrating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011550853.4A CN112484822A (en) 2020-12-24 2020-12-24 Loop flow calibrating device

Publications (1)

Publication Number Publication Date
CN112484822A true CN112484822A (en) 2021-03-12

Family

ID=74915539

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011550853.4A Pending CN112484822A (en) 2020-12-24 2020-12-24 Loop flow calibrating device

Country Status (1)

Country Link
CN (1) CN112484822A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114577312A (en) * 2022-05-06 2022-06-03 南京深度系统工程有限公司 Loop detection device containing multistage standards and online calibration method of standard

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101358871A (en) * 2008-08-05 2009-02-04 美新半导体(无锡)有限公司 Actual flow circle calibrating apparatus for gas flowmeter and calibrating method thereof
CN102506964A (en) * 2011-10-26 2012-06-20 中国计量学院 Liquid reservoir automatic calibration device and calibration method
CN203191038U (en) * 2013-04-18 2013-09-11 重庆市计量质量检测研究院 Movable type gas flow measurement standard device and gas flow measurement closed-loop type system
CN108225443A (en) * 2016-12-14 2018-06-29 中国石油天然气股份有限公司 Gas discharge detects circuit device
CN213515916U (en) * 2020-12-24 2021-06-22 南京应诺测控技术有限公司 Loop flow calibrating device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101358871A (en) * 2008-08-05 2009-02-04 美新半导体(无锡)有限公司 Actual flow circle calibrating apparatus for gas flowmeter and calibrating method thereof
CN102506964A (en) * 2011-10-26 2012-06-20 中国计量学院 Liquid reservoir automatic calibration device and calibration method
CN203191038U (en) * 2013-04-18 2013-09-11 重庆市计量质量检测研究院 Movable type gas flow measurement standard device and gas flow measurement closed-loop type system
CN108225443A (en) * 2016-12-14 2018-06-29 中国石油天然气股份有限公司 Gas discharge detects circuit device
CN213515916U (en) * 2020-12-24 2021-06-22 南京应诺测控技术有限公司 Loop flow calibrating device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114577312A (en) * 2022-05-06 2022-06-03 南京深度系统工程有限公司 Loop detection device containing multistage standards and online calibration method of standard

Similar Documents

Publication Publication Date Title
CN204085645U (en) With the gas flow standard device of self calibration structure
CN104990669B (en) Surge pressure sensor field calibration device
CN102175714A (en) Heat radiator and fan performance testing system
CN207231786U (en) A kind of air-valve comprehensive performance test device
CN203837782U (en) Diaphragm gas meter metering performance isothermal calibrating apparatus under conditions of limiting temperature
CN105445007A (en) Gas fuel control valve flow characteristic testing system and method for combustion gas turbine
CN213515916U (en) Loop flow calibrating device
CN108007534B (en) Natural gas high-flow real-flow verification system
CN112484822A (en) Loop flow calibrating device
CN109029943B (en) Two-loop check valve test device
CN103837215A (en) Reversing valve type pVTt-method gas flow device
CN204386715U (en) For the thermostatically-controlled equipment of engine coolant
CN214748332U (en) Novel gas flow verification device for loop
CN205388506U (en) Circulating high -pressure gas flow rate standard facility
RU2628657C2 (en) Method of verification and calibration of gas meters
CN103900665A (en) Container combination and reversing valve type pVTt-method gas flow device
CN109374064B (en) Device and method for testing flow characteristics of metal hose
CN1188671C (en) Gas flow standardizing devices
CN217786309U (en) Continuously-running parallel double-station gas flowmeter calibrating device
CN114577312B (en) Loop detection device containing multistage standards and online calibration method of standard
CN216210669U (en) Gas flow controller system of leaking hunting
CN113686415B (en) Flow measurement standard device for simulating actual application scene
CN214702702U (en) Air flow test bed for gas turbine component
CN212180747U (en) Gas divider
CN210426717U (en) Sound velocity nozzle calibrating device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination