CN117309108A - Flow measurement calibration device and calibration method thereof - Google Patents
Flow measurement calibration device and calibration method thereof Download PDFInfo
- Publication number
- CN117309108A CN117309108A CN202311404158.0A CN202311404158A CN117309108A CN 117309108 A CN117309108 A CN 117309108A CN 202311404158 A CN202311404158 A CN 202311404158A CN 117309108 A CN117309108 A CN 117309108A
- Authority
- CN
- China
- Prior art keywords
- calibration
- comparison
- flow
- pipelines
- gas
- 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
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012360 testing method Methods 0.000 claims description 22
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000013076 uncertainty analysis Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a flow measurement calibration device and a calibration method thereof, and relates to the technical field of flow measurement equipment, wherein the flow measurement calibration device comprises an air inlet system, a calibration system, a comparison system, a first flow tube calibration system and a second flow tube calibration system: the utility model discloses a calibration system, including the calibration system, air inlet system, calibration system and comparison system connect gradually, first flow tube calibration system and second flow tube calibration system connect in parallel and set up the output at comparison system, calibration system includes surge tank, gas collection jar and calibration pipeline, air inlet system communicates to the surge tank, the calibration pipeline sets up a plurality of, and the input of a plurality of calibration pipeline communicates to the surge tank, and the output of a plurality of calibration pipeline communicates to the gas collection jar, the calibration pipeline has set gradually ball valve, measurement subassembly, venturi nozzle and ball valve from input to output, and this scheme can realize horn mouth formula flow tube calibration and classical venturi calibration.
Description
Technical Field
The invention relates to the technical field of flow measurement equipment, in particular to a flow measurement calibration device and a calibration method based on the same.
Background
The critical flow venturi nozzle (called sonic nozzle for short) is a differential pressure flowmeter which gradually reduces from an inlet to a throat and gradually expands to an outlet, and comprises a constriction section, a throat and a diffusion section. The sonic nozzle is used as a transmission standard for transmitting the magnitude of other types of gas flow meters at home and abroad due to the characteristics of simple structure, no movable parts, high accuracy, good repeatability and the like. Meanwhile, the sonic nozzle can directly trace the quantity value to the national gas flow original standard device. Therefore, the sonic nozzle occupies an important position in a gas flow quantity value tracing system, and is a key link for ensuring accurate and reliable gas flow measurement and uniform quantity value.
The flow calibration device in the prior art has the advantages of short period of the period verification of the critical flow Venturi nozzle of the experimental device, and large workload of disassembly, assembly and primary calibration, thereby improving the maintenance cost of equipment.
Disclosure of Invention
The invention aims to provide a flow measurement calibration device and a calibration method thereof, aiming at the defects existing in the prior art.
A flow measurement calibration device, comprising
An air inlet system: introducing high-pressure gas, and adjusting the flow rate of the input high-pressure gas;
the calibration system: the method comprises the steps of adopting a critical flow Venturi nozzle to test and calibrate input gas;
and (3) a comparison system: calibrating the calibration system;
first flow tube calibration system: calibration for a flare flow tube;
a second flow tube calibration system: for calibrating a flow meter in the form of a classical venturi;
the utility model discloses a calibration system, including the calibration system, the calibration system is connected gradually, the calibration system is connected in parallel with the calibration system, the calibration system includes surge tank, gas collection jar and calibration pipeline, the air intake system communicates to the surge tank, the calibration pipeline sets up a plurality of, and the input of a plurality of calibration pipeline communicates to the surge tank, and the output of a plurality of calibration pipeline communicates to the gas collection jar, the calibration pipeline has set gradually ball valve, measurement assembly, venturi nozzle and ball valve from the input to the output.
Further, the plurality of calibration pipelines are divided into three groups, the first group of calibration pipelines and the second group of calibration pipelines are respectively provided with 11 calibration pipelines, and the third group of calibration pipelines are provided with 22 calibration pipelines.
Further, the venturi nozzle throat diameter in the first set of calibration lines is 7mm-9mm; the venturi nozzle throat diameter in the second set of calibration lines is 7mm-9mm; the venturi nozzle throat diameters in the third set of calibrated lines are 22mm-24mm.
Further, the measuring assembly includes a temperature gauge and a pressure gauge.
Further, two temperature measuring instruments are arranged, and the two temperature measuring instruments are respectively arranged at two ends of the Venturi nozzle.
Further, the comparison system comprises a stagnation container, a back flow pipe and a comparison pipeline, the calibration system is communicated to the stagnation container, the comparison pipeline is provided with a plurality of comparison pipelines, the input ends of the plurality of comparison pipelines are communicated with the stagnation container, and the output ends of the plurality of comparison pipelines are communicated to the back flow pipe.
Further, each comparison pipeline is provided with a Venturi nozzle, a pressure measuring instrument and a valve in sequence from an input end to an output end.
Further, the plurality of comparison pipelines are divided into four groups,
1 first group of comparison pipelines are arranged, and the throat diameter of the venturi nozzle in the first group of comparison pipelines is 11-12 mm;
the second group of comparison pipelines is provided with 1 branch, and the throat diameter of the venturi nozzle in the second group of comparison pipelines is 16mm-17mm;
the third group of comparison pipelines is provided with 2 pipelines, and the throat diameter of the venturi nozzle in the third group of comparison pipelines is 22mm-23mm;
21 fourth groups of comparison pipelines are arranged, and the throat diameter of the venturi nozzles in the fourth groups of comparison pipelines is 32mm-33mm.
Further, a main pipeline regulating valve group and a bypass regulating valve group are arranged in the air inlet system, and the main pipeline regulating valve group is communicated with the calibration system
A method of calibrating a flow measurement calibration device, comprising the steps of:
s1, conveying high-pressure air flow into an air inlet system, controlling air supply flow through a main pipeline regulating valve group, and discharging redundant circulating air through a bypass regulating valve group;
s2, gas supplied in the air inlet system enters a pressure stabilizing tank, and the gas is rectified and buffered in the pressure stabilizing tank to provide a flow field with stable and uniform pressure for a critical flow Venturi nozzle system;
s3, stable gas enters a calibration system, a transmission calibration standard of a calibration test is carried out through a high-precision critical flow Venturi nozzle, and ball valves on corresponding grouping calibration pipelines are opened according to test requirements;
s4, enabling the calibrated gas to enter a comparison system, enabling the gas to enter a stagnation container to be in a relative stagnation state, opening a corresponding valve according to test requirements to enable a corresponding comparison pipeline to be opened, enabling the gas to enter the corresponding comparison pipeline to carry out a test, and comparing measured data with data of the calibration system;
s5, enabling the gas to enter the back flow pipe through the comparison pipelines, and rectifying the gas output by the comparison pipelines by the back flow pipe
And S6, guiding the gas in the back flow pipe to the first flow pipe calibration system and the second flow pipe calibration system according to test requirements to calibrate the bell-mouth type flow pipe and the flowmeter in the classical venturi tube mode respectively.
Compared with the prior art, the invention has the advantages that:
the method comprises the following steps: the flow measuring device in the tester is verified and adjusted by comparing the flow measuring device in the tester with the standard device, and the output difference of the flow measuring device in the tester and the standard device under the same flow condition is measured. The alignment system will record and analyze these differences and make calibration adjustments based on the accuracy of the standard equipment to achieve the predetermined accuracy requirements for the flow measurement equipment in the tester.
And two,: in the scheme, the calibration pipelines are divided into three groups, the first group of calibration pipelines and the second group of calibration pipelines are respectively provided with 11 branches, the third group of calibration pipelines are provided with 22 branches, and the diameter of a venturi nozzle throat in the first group of calibration pipelines is 7-9 mm; the venturi nozzle throat diameter in the second set of calibration lines is 7mm-9mm; the venturi nozzle throat diameters in the third set of calibrated lines are 22mm-24mm. As a high-precision calibration system, the maximum flow rate of the second group of calibration pipelines and the third group of calibration pipelines can reach 6.3kg/s, the second group of calibration pipelines and the third group of calibration pipelines can be integrally moved to other testers or occasions where the second group of calibration pipelines are needed, other flowmeters can be calibrated, one group of calibration pipelines can be arranged to be frequently used according to the actual use condition of the testers, the other group of calibration pipelines is not frequently used, the other functions of the two groups of calibration pipelines are set, namely, the other group of calibration pipelines is tested by the group of calibration pipelines which is not frequently used.
Drawings
FIG. 1 is a block diagram of the first embodiment;
FIG. 2 is a block diagram of the second embodiment;
FIG. 3 is a schematic diagram of a calibration pipeline;
fig. 4 is a schematic structural diagram of a comparative pipeline.
Detailed Description
As shown in connection with figures 1-4 of the drawings,
a flow measurement calibration device, comprising
An air inlet system: introducing high-pressure gas, and adjusting the flow rate of the input high-pressure gas;
the calibration system: the method comprises the steps of adopting a critical flow Venturi nozzle to test and calibrate input gas; the critical flow Venturi nozzle is used as a flow sensor, and the flow is accurately measured and calibrated by combining a comparison system and a calibration system;
and (3) a comparison system: the calibration system is calibrated to verify and adjust the flow measurement devices in the tester by comparison with standard devices of known accuracy, and to measure the output differences of the flow measurement devices in the tester under the same flow conditions by comparison with the standard devices. The alignment system will record and analyze these differences and make calibration adjustments based on the accuracy of the standard equipment to achieve the predetermined accuracy requirements for the flow measurement equipment in the tester.
First flow tube calibration system: calibration for a flare flow tube;
a second flow tube calibration system: for calibrating a flow meter in the form of a classical venturi;
the utility model discloses a calibration system, including the calibration system, the calibration system is connected gradually, the calibration system is connected in parallel with the calibration system, the calibration system includes surge tank, gas collection jar and calibration pipeline, the air intake system communicates to the surge tank, the calibration pipeline sets up a plurality of, and the input of a plurality of calibration pipeline communicates to the surge tank, and the output of a plurality of calibration pipeline communicates to the gas collection jar, the calibration pipeline has set gradually ball valve, measurement assembly, venturi nozzle and ball valve from the input to the output.
The air inlet system is used for introducing high-pressure air with stable flow pressure into the calibration system for calibration, the calibrated air enters the comparison system for calibration, the flow measurement equipment in the tester is calibrated for ensuring the accuracy and reliability of the flow measurement equipment, the comparison system is used for calibrating the calibration system, the critical flow venturi nozzle is of a special nozzle structure, when fluid passes through the nozzle, the flow speed reaches the critical speed, the pressure and the speed of the fluid meet a certain relation, the mass flow of the fluid can be calculated by measuring the pressure and the temperature of the fluid, then the air enters the first flow tube calibration system and/or the first flow tube calibration system for calibration, and the bell-mouth type flow tube and the classical venturi tube are two types of flow meters and are required to be calibrated through the critical venturi nozzle system for ensuring the accuracy of the flow venturi nozzle. The calibration process involves multiple steps and components and requires uncertainty analysis.
The tester adopts a continuous air source to convey compressed air, the air source is provided by an air compressor, the maximum flow is calculated according to 104kg/s, the pressure is 5.5MPa, and the temperature is about 313-353K. After the air source conveying pipeline is paved outside the tester factory building and nearby, the air source conveying pipeline is connected by the tester, and paved and introduced into the tester factory building.
The air inlet system is provided with a total air inlet valve for controlling the on-off of a pipeline, and a main pipeline regulating valve group and a bypass regulating valve group are arranged behind the valve and used for accurately controlling the flow of air; when the flow tube is calibrated, the main pipeline regulating valve group is opened, so that air flows at a controlled speed, a pipeline behind the bypass regulating valve group is discharged into the silencing tower, and gas is discharged through the bypass regulating valve group.
A pressure stabilizing tank and a section of gas collecting tank are arranged at the downstream of the gas inlet system to ensure that the quality of a flow field is close to a measurement standard, a plurality of calibration pipelines are connected behind the pressure stabilizing tank, a venturi nozzle is arranged on each calibration pipeline, and the venturi nozzle is used as a high-precision measurement mass flow transmission standard and used for calibrating a flow tube.
Setting a gas collection tank after calibrating the system for collecting gas; the rear of the gas collection tank is connected with a stagnation container which is used as a plurality of venturi nozzles of a large-space installation comparison system.
And a back flow pipe is arranged behind the comparison system, two parallel calibration pipes of the horn-shaped flow pipe calibration system and the classical venturi pipe calibration system are connected behind the back flow pipe, and finally the back flow pipe is discharged to the atmosphere through an exhaust tower.
After the test, the flow coefficient of the air inlet channel is determined by using a calibration equation, and uncertainty analysis of the calibration test is performed. In addition, according to the flow measurement calibration object, a horn-shaped flow tube or a classical venturi tube can be controlled by comparing a valve switch behind the system, and different pipelines are selected to calibrate the flow measurement calibration object.
And (3) recording the whole course of test data, transmitting various parameter signals acquired in the test to an acquisition computer through a pressure acquisition system, a temperature acquisition system and the like, and displaying, processing, analyzing and storing.
Preferably, the plurality of calibration pipelines are divided into three groups, the first group of calibration pipelines and the second group of calibration pipelines are respectively provided with 11 calibration pipelines, the third group of calibration pipelines are provided with 22 calibration pipelines, and the diameter of a venturi nozzle throat in the first group of calibration pipelines is 7-9 mm; the venturi nozzle throat diameter in the second set of calibration lines is 7mm-9mm; the venturi nozzle throat diameters in the third set of calibrated lines are 22mm-24mm. As a high-precision calibration system, the maximum flow rate of the second group of calibration pipelines and the third group of calibration pipelines can reach 6.3kg/s, the second group of calibration pipelines and the third group of calibration pipelines can be integrally moved to other testers or occasions where the second group of calibration pipelines are needed, other flowmeters can be calibrated, one group of calibration pipelines can be arranged to be frequently used according to the actual use condition of the testers, the other group of calibration pipelines is not frequently used, the other functions of the two groups of calibration pipelines are set, namely, the other group of calibration pipelines is tested by the group of calibration pipelines which is not frequently used.
Optionally, the measuring assembly includes temperature measuring instrument and pressure measuring instrument, temperature measuring instrument sets up two, and two temperature measuring instruments set up respectively at venturi nozzle's both ends, temperature measuring instrument (+ -0.1 ℃) and measuring range (0-100) DEG C, and the precision of pressure measuring instrument directly decides the measurement accuracy of this set of device, consequently in order to guarantee the high accuracy of system, selects the high accuracy pressure measuring instrument that the precision is 0.025%, uses digital quantity signal transmission, has guaranteed the reliable transmission of signal.
In order to further reduce the measurement uncertainty of the device, two pressure measuring instruments with different measuring ranges are arranged at the upstream collecting pipe of the nozzle, the pressure measuring instruments with two measuring ranges of 5.5MPa and 2.5MPa are respectively arranged at the upstream collecting pipe of the nozzle, the pressure measuring instruments with corresponding measuring ranges are selected according to the difference of the measured pressure, a differential pressure type transmitter is arranged at each critical flow Venturi nozzle to measure the differential pressure between the collecting pipe and the nozzle, and the stagnation pressure measurement at the nozzle is realized by combining the absolute pressure at the collecting pipe with the differential pressure transmitter at the nozzle, so that the purpose of reducing the measurement uncertainty is achieved.
Preferably, the comparison system comprises a stagnation container, a back flow pipe and comparison pipelines, the calibration system is communicated to the stagnation container, the comparison pipelines are provided with a plurality of, the input ends of the plurality of comparison pipelines are communicated with the stagnation container, the output ends of the plurality of comparison pipelines are communicated to the back flow pipe, and each comparison pipeline is provided with a Venturi nozzle, a pressure measuring instrument and a valve from the input end to the output end in sequence.
A large space installation mode is used for comparing all critical flow Venturi nozzles of the system, an AA-level temperature measuring instrument (+ -0.1 ℃) is installed in the stagnation container, and the measuring range is 0-100 ℃.
For pressure and temperature transmitters installed in large space, because the gas in the stagnation container is in a relatively stagnation state in a large space mode, static pressure can be obtained at any position of the wall of the stagnation container to serve as stagnation pressure of the device, in order to further reduce measurement uncertainty of the device, three pressure transmitters with different measuring ranges, namely, absolute pressure transmitters with three measuring ranges of 5.5MPa,2.5MPa and 0.5MPa, are installed in the stagnation container, and the pressure transmitters with corresponding measuring ranges are selected according to the difference of the measured pressure.
Preferably, the number of comparison pipelines is divided into four groups, the total number is 21, the total flow is 81.491kg/s (at the pressure of 2.53 MPa),
1 first group of comparison pipelines are arranged, and the throat diameter of the venturi nozzle in the first group of comparison pipelines is 11-12 mm;
the second group of comparison pipelines is provided with 1 branch, and the throat diameter of the venturi nozzle in the second group of comparison pipelines is 16mm-17mm;
the third group of comparison pipelines is provided with 2 pipelines, and the throat diameter of the venturi nozzle in the third group of comparison pipelines is 22mm-23mm;
21 fourth groups of comparison pipelines are arranged, and the throat diameter of the venturi nozzles in the fourth groups of comparison pipelines is 32mm-33mm.
Preferably, a main pipeline regulating valve group and a bypass regulating valve group are arranged in the air inlet system, and the main pipeline regulating valve group is communicated with the calibration system.
A method of calibrating a flow measurement calibration device, comprising the steps of:
s1, conveying high-pressure air flow into an air inlet system, controlling air supply flow through a main pipeline regulating valve group, and discharging redundant circulating air through a bypass regulating valve group;
s2, gas supplied in the air inlet system enters a pressure stabilizing tank, and the gas is rectified and buffered in the pressure stabilizing tank to provide a flow field with stable and uniform pressure for a critical flow Venturi nozzle system;
s3, stable gas enters a calibration system, a transmission calibration standard of a calibration test is carried out through a high-precision critical flow Venturi nozzle, and ball valves on corresponding grouping calibration pipelines are opened according to test requirements;
s4, enabling the calibrated gas to enter a comparison system, enabling the gas to enter a stagnation container to be in a relative stagnation state, opening a corresponding valve according to test requirements to enable a corresponding comparison pipeline to be opened, enabling the gas to enter the corresponding comparison pipeline to carry out a test, and comparing measured data with data of the calibration system;
s5, enabling the gas to enter the back flow pipe through the comparison pipelines, and rectifying the gas output by the comparison pipelines by the back flow pipe
And S6, guiding the gas in the back flow pipe to the first flow pipe calibration system and the second flow pipe calibration system according to test requirements to calibrate the bell-mouth type flow pipe and the flowmeter in the classical venturi tube mode respectively.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, a description of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A flow measurement calibration device, comprising:
an air inlet system: introducing high-pressure gas, and adjusting the flow rate of the input high-pressure gas;
the calibration system: the method comprises the steps of adopting a critical flow Venturi nozzle to test and calibrate input gas;
and (3) a comparison system: calibrating the calibration system;
first flow tube calibration system: calibration for a flare flow tube;
a second flow tube calibration system: for calibrating a flow meter in the form of a classical venturi;
the utility model discloses a calibration system, including the calibration system, the calibration system is connected gradually, the calibration system is connected in parallel with the calibration system, the calibration system includes surge tank, gas collection jar and calibration pipeline, the air intake system communicates to the surge tank, the calibration pipeline sets up a plurality of, and the input of a plurality of calibration pipeline communicates to the surge tank, and the output of a plurality of calibration pipeline communicates to the gas collection jar, the calibration pipeline has set gradually ball valve, measurement assembly, venturi nozzle and ball valve from the input to the output.
2. A flow measurement calibration apparatus according to claim 1 wherein the plurality of calibration lines is divided into three groups, the first group of calibration lines and the second group of calibration lines each having 11 calibration lines, the third group of calibration lines having 22 calibration lines.
3. A flow measurement calibration device according to claim 2 wherein the venturi nozzle throat diameters in the first set of calibration lines are 7mm-9mm; the venturi nozzle throat diameter in the second set of calibration lines is 7mm-9mm; the venturi nozzle throat diameters in the third set of calibrated lines are 22mm-24mm.
4. A flow measurement calibration device as defined in claim 1, wherein the measurement assembly comprises a temperature gauge and a pressure gauge.
5. A flow measurement calibration device according to claim 4 wherein there are two temperature gauges, one at each end of the venturi nozzle.
6. The flow measurement calibration device of claim 1, wherein the comparison system comprises a stagnation vessel, a back flow pipe and a comparison pipeline, the calibration system is communicated to the stagnation vessel, the comparison pipeline is provided with a plurality of comparison pipelines, the input ends of the plurality of comparison pipelines are communicated with the stagnation vessel, and the output ends of the plurality of comparison pipelines are communicated to the back flow pipe.
7. A flow measurement calibration device according to claim 6 wherein each contrast conduit is provided with a venturi nozzle, a pressure gauge and a valve in sequence from the input end to the output end.
8. A flow measurement calibration apparatus according to claim 7 wherein the plurality of comparison lines are divided into four groups,
1 first group of comparison pipelines are arranged, and the throat diameter of the venturi nozzle in the first group of comparison pipelines is 11-12 mm;
the second group of comparison pipelines is provided with 1 branch, and the throat diameter of the venturi nozzle in the second group of comparison pipelines is 16mm-17mm;
the third group of comparison pipelines is provided with 2 pipelines, and the throat diameter of the venturi nozzle in the third group of comparison pipelines is 22mm-23mm;
21 fourth groups of comparison pipelines are arranged, and the throat diameter of the venturi nozzles in the fourth groups of comparison pipelines is 32mm-33mm.
9. A flow measurement calibration device according to claim 1, wherein a main line regulator valve block and a bypass regulator valve block are provided in the air intake system, the main line regulator valve block being in communication with the calibration system.
10. Calibration method based on a calibration device according to any of claims 1-9, characterized in that it comprises the steps of:
s1, conveying high-pressure air flow into an air inlet system, controlling air supply flow through a main pipeline regulating valve group, and discharging redundant circulating air through a bypass regulating valve group;
s2, gas supplied in the air inlet system enters a pressure stabilizing tank, and the gas is rectified and buffered in the pressure stabilizing tank to provide a flow field with stable and uniform pressure for a critical flow Venturi nozzle system;
s3, stable gas enters a calibration system, a transmission calibration standard of a calibration test is carried out through a high-precision critical flow Venturi nozzle, and ball valves on corresponding grouping calibration pipelines are opened according to test requirements;
s4, enabling the calibrated gas to enter a comparison system, enabling the gas to enter a stagnation container to be in a relative stagnation state, opening a corresponding valve according to test requirements to enable a corresponding comparison pipeline to be opened, enabling the gas to enter the corresponding comparison pipeline to carry out a test, and comparing measured data with data of the calibration system;
s5, enabling the gas to enter the back flow pipe through the comparison pipelines, and rectifying the gas output by the comparison pipelines by the back flow pipe
And S6, guiding the gas in the back flow pipe to the first flow pipe calibration system and the second flow pipe calibration system according to test requirements to calibrate the bell-mouth type flow pipe and the flowmeter in the classical venturi tube mode respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311404158.0A CN117309108A (en) | 2023-10-26 | 2023-10-26 | Flow measurement calibration device and calibration method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311404158.0A CN117309108A (en) | 2023-10-26 | 2023-10-26 | Flow measurement calibration device and calibration method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117309108A true CN117309108A (en) | 2023-12-29 |
Family
ID=89281156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311404158.0A Pending CN117309108A (en) | 2023-10-26 | 2023-10-26 | Flow measurement calibration device and calibration method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117309108A (en) |
-
2023
- 2023-10-26 CN CN202311404158.0A patent/CN117309108A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204085645U (en) | With the gas flow standard device of self calibration structure | |
| CN109506744B (en) | Air flow calibration method for venturi nozzle of aircraft engine complete machine test | |
| CN203837782U (en) | Diaphragm gas meter metering performance isothermal calibrating apparatus under conditions of limiting temperature | |
| CN210036908U (en) | High-pressure natural gas flow primary standard device with adjustable sonic nozzle | |
| CN111735520A (en) | Gas flow standard device with high-pressure and low-pressure double calibration sections and calibration method thereof | |
| CN101140162A (en) | Method for measuring complicated type face flow area with supercritical pressure ratio | |
| CN114018349A (en) | Gas flow measuring device, measuring system and measuring method based on ultrasonic waves | |
| CN207081470U (en) | A kind of sonic nozzle calibrating installation | |
| CN106153162B (en) | Gas flowmeter detection equipment | |
| CN209639805U (en) | A kind of aerospace automatic calibration unit for gas flowmeters | |
| CN117309108A (en) | Flow measurement calibration device and calibration method thereof | |
| CN114577312B (en) | Loop detection device containing multistage standards and online calibration method of standard | |
| CN215338512U (en) | Calibrating device for orifice flowmeter | |
| CN212254275U (en) | Gas flow standard device with high-low pressure double calibration sections | |
| CN210426717U (en) | Sound velocity nozzle calibrating device | |
| CN209166602U (en) | Positive pressure method gas flow caliberating device | |
| CN114964398A (en) | Plug-in type gas ultrasonic flowmeter with calibration function | |
| CN113311116A (en) | Static evaporation rate testing device and method based on low-temperature heat-insulating container | |
| CN203534679U (en) | Correction system of orifice plate flow meter | |
| CN113932891A (en) | Flowmeter error detection device | |
| US6959610B1 (en) | Manual purge system for instrumentation flow element tubing | |
| CN108955839B (en) | Automatic flow calibrating device for electronic soap film | |
| CN109211372B (en) | Low-pressure critical flow venturi nozzle calibrating device | |
| CN216385920U (en) | Flow calibrating device and flow calibrating system | |
| CN109696228A (en) | A kind of aerospace automatic calibration unit for gas flowmeters and its calibration method |
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 |