CN217900973U - Gas flowmeter's calibrating device - Google Patents
Gas flowmeter's calibrating device Download PDFInfo
- Publication number
- CN217900973U CN217900973U CN202221814790.3U CN202221814790U CN217900973U CN 217900973 U CN217900973 U CN 217900973U CN 202221814790 U CN202221814790 U CN 202221814790U CN 217900973 U CN217900973 U CN 217900973U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- calibrated
- storage device
- gas
- flow meter
- 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.)
- Active
Links
Images
Abstract
The utility model belongs to the technical field of gaseous detection device's calibration, a gas flowmeter's calibrating device is related to, including the air-blower, the air-blower is connected with first gas storage device, and first gas storage device is connected with the gaseous storage device of second through first pipeline and second pipeline respectively, sets up calibrated mass flow meter and valve on the first pipeline, sets up on the second pipeline and remains calibrated mass flow meter and valve, all is provided with pressure monitoring devices on first gas storage device and the gaseous storage device of second, calibrated mass flow meter and wait that calibrated mass flow meter all connects timing device, the utility model discloses can solve the problem that the current flowmeter of laboratory calibration is with high costs, can't detect whether mass flow meter blocks up, check for the period of experimental apparatus provides a means.
Description
Technical Field
The utility model belongs to the technical field of gaseous detection device's calibration, a gas flowmeter's calibrating device is related to.
Background
The CNAS approved standardized laboratory can not only improve the detection capability, but also improve the reputation of the laboratory in the same industry, and is also very important for the business development of enterprises. However, one of the important links in gaining CNAS approval to qualify a standardized laboratory is that the laboratory instruments have calibrability and accountability, such as: gas mass flow meter, industrial analyzer, calorimeter.
At present, aiming at the calibration of a mass flowmeter, a formal calibration mechanism (such as a metering institute of x city) is adopted for calibration and a calibration certificate is issued, if the mass flowmeter of the same type or type is involved, the formal calibration mechanism is also used for calibration or issuing the calibration certificate, which inevitably increases the calibration cost, meanwhile, when a large batch of mass flowmeters of the same type or type are calibrated, because the mass flowmeters are all installed on a mass flowmeter fixing device in a laboratory, the mass flowmeters are required to be disassembled from the fixing device for calibration, because the batch number is large, the disassembly of the mass flowmeters is inconvenient, time and labor are wasted, the labor intensity of experimenters is increased invisibly, and in addition, the existing detection means can not detect whether the mass flowmeters are blocked, therefore, aiming at the problems that the existing gas flowmeter in the laboratory is large in the number and is not easy to disassemble on equipment, the calibration device of the gas flowmeter needs to be provided, so as to solve the problems that the calibration cost is high and whether the mass flowmeters are blocked or not detected in the laboratory, and a checking means is provided for checking the period of the experimental instrument.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem: the gas flowmeter calibrating device is used for solving the problems that the existing laboratory flowmeter is high in calibrating cost and cannot detect whether the mass flowmeter is blocked, and provides a checking means for checking the period of an experimental instrument.
The technical scheme of the utility model:
the utility model provides a calibrating device of gas flowmeter, includes the air-blower, the air-blower be connected with first gas storage device, first gas storage device is connected with second gas storage device through first pipeline and second pipeline respectively, first pipeline on set up calibrated mass flowmeter and valve, the second pipeline on set up and to wait to calibrate mass flowmeter and valve, first gas storage device and second gas storage device on all be provided with pressure monitoring device, calibrated mass flowmeter with wait to calibrate mass flowmeter and all connect timing device.
Furthermore, the valve is an adjustable valve.
Furthermore, the first pipeline and the second pipeline are both provided with filters.
Furthermore, the filter is positioned at the front end of the calibrated mass flow meter and the mass flow meter to be calibrated.
Further, the filter is a Y-shaped filter.
Further, the first gas storage device and the second gas storage device are gas storage tanks.
Furthermore, the timing device is a digital timer.
Further, the mass flowmeter to be calibrated is installed on a laboratory mass flowmeter fixing device.
Furthermore, the inlet ends of the first pipeline and the second pipeline are connected with the outlet end of a first common pipeline, and the inlet end of the first common pipeline is connected with a first gas storage device; the outlet ends of the first pipeline and the second pipeline are connected with the inlet end of a second common pipeline, and the outlet end of the second common pipeline is connected with a second gas storage device.
Furthermore, a valve is arranged on a pipeline connecting the blower and the first gas storage device; valves are also arranged on the first common pipeline and the second common pipeline.
The utility model has the advantages that: the utility model provides a gas flowmeter's calibrating device, to installing the treatment calibration mass flow meter on laboratory fixing device, only need will treat that calibration mass flow meter is connected to in the second pipeline, thereby it is parallelly connected with the treatment calibration mass flow meter on the laboratory fixing device to make calibrated mass flow meter, can treat calibration mass flow meter's detection, treat the calibration back that finishes, can only need dismantle calibrated mass flow meter can, need not treat that calibration mass flow meter dismantles from laboratory fixing device, the cost of calibration has also been saved simultaneously.
In addition, when the mass flowmeter to be calibrated is calibrated, the gas flow rate of the mass flowmeter to be calibrated and the gas flow rate of the mass flowmeter to be calibrated are set to be the same, namely, the time required when the pressure difference delta P between the two ends of the mass flowmeter to be calibrated and the pressure difference delta P between the two ends of the mass flowmeter to be calibrated are 0 is the same, and if the time required when the pressure difference delta P between the two ends of the mass flowmeter to be calibrated is 0 is greater than the time required when the pressure difference delta P between the two ends of the mass flowmeter to be calibrated is 0, the mass flowmeter to be calibrated can be judged to have the blockage problem.
The utility model discloses still for the check of mass flow meter provides a check means during: the period check is an indispensable important link in a CNAS recognition system, other mass flowmeters are checked within the validity period of the calibration certificate, the checking mode is consistent with the calibration mode, each other mass flowmeter on the device needs to be calibrated by the calibrated mass flowmeter, and whether the flowmeter generates out-of-range errors within the validity period of the calibration certificate is checked.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1. the device comprises a blower, 2, a pressure monitoring device, 3-1, a first gas storage device, 3-2, the first gas storage device, 4, a filter, 5-1, a calibrated mass flow meter, 5-2, a mass flow meter to be calibrated, 6 an adjustable valve, 7, a timing device, 8-1, a first pipeline, 8-2, a second pipeline, 9-1, a first common pipeline, 9-2 and a second common pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 shows an embodiment of a calibration device for a gas flowmeter according to the present invention, which includes an air blower 1, the air blower 1 is connected to a first gas storage device 3-1 through a pipeline, the first gas storage device 3-1 is connected to a second gas storage device 3-2 through a first pipeline 8-1 and a second pipeline 8-2, a calibrated mass flowmeter 5-1 and a valve 6 are disposed on the first pipeline 8-1, a mass flowmeter 5-2 to be calibrated and a valve 6 are disposed on the second pipeline 8-2, a pressure monitoring device 2 is disposed on each of the first gas storage device 3-1 and the second gas storage device 3-2, and the calibrated mass flowmeter 5-1 and the mass flowmeter 5-2 to be calibrated are connected to a timing device 7.
In this embodiment, the valve 6 is an adjustable valve, and the opening of the valve 6 can be adjusted according to the flow rate of the gas in the pipeline, so as to match the appropriate gas flow rate.
In this embodiment, the first pipeline 8-1 and the second pipeline 8-2 are both provided with a filter 4, the filter 4 is located at the front end of the calibrated mass flow meter 5-1 and the mass flow meter to be calibrated 5-2, the filter 4 is provided with a porous filtering material, and the dust is captured from the gas-solid two-phase flow through the action of the porous filtering material, so that the gas is purified. The filter 4 adsorbs the gas in the pipeline, so that the parts such as the pipeline, the mass flow meter and the like can be prevented from being blocked by dust and impurities in the pipeline airflow.
In this embodiment, the filter 4 is a Y-type filter. The Y-shaped filter is a common filtering device in a pipeline for conveying gas masses, is positioned at the front ends of a calibrated mass flow meter 5-1 and a mass flow meter to be calibrated 5-2 and is used for removing impurities in the pipeline gas so as to protect the valve 6 and the mass flow meter from normal use. The Y-shaped filter has the characteristics of advanced structure, small resistance, convenient pollution discharge and the like. The suitable medium of the Y-shaped filter can be water, oil and gas. The general ventilation net is 10-100 meshes. After the gas enters the Y-filter through the main pipe, the solid impurity particles are blocked in the filter basket, while the clean fluid flows through the filter basket, from the filter outlet to the mass flow meter and valve 6.
In this embodiment, the first gas storage device 3-1 and the second gas storage device 3-2 are gas storage tanks, which are convenient to use, have large capacity, and have good use advantages.
In this embodiment, the timing device 7 is a digital timer, the digital timer is convenient for an operator to control, and the digital timer displays time through the LED lamp tube, so that the operator can observe and record conveniently.
In this embodiment, the mass flow meter 5-2 to be calibrated is installed on the laboratory mass flow meter fixing device, and for the mass flow meter 5-2 to be calibrated installed on the laboratory fixing device, only the mass flow meter 5-2 to be calibrated needs to be connected to the second pipeline 8-2, so that the mass flow meter 5-1 to be calibrated and the mass flow meter 5-2 to be calibrated on the laboratory fixing device are connected in parallel, and the mass flow meter 5-2 to be calibrated can be detected, after the calibration is completed, only the mass flow meter 5-1 to be calibrated needs to be disassembled, the mass flow meter 5-2 to be calibrated does not need to be disassembled from the laboratory fixing device, and meanwhile, the calibration cost is also saved.
In this embodiment, the inlet ends of the first pipeline 8-1 and the second pipeline 8-2 are connected to the outlet end of the first common pipeline 9-1, and the inlet end of the first common pipeline 9-1 is connected to the first gas storage device 3-1; the outlet ends of the first pipeline 8-1 and the second pipeline 8-2 are connected with the inlet end of a second common pipeline 9-2, the outlet end of the second common pipeline 9-2 is connected with a second gas storage device 3-2, and the common pipeline is added, so that the manufacturing cost of the device can be saved.
In this embodiment, a valve is disposed on a pipeline connecting the blower 1 and the first gas storage device 3-1; valves are also provided in the first and second common lines 9-1 and 9-2 for controlling the amount of gas that is supplied to the first gas storage means 3-1 by the blower 1 and to the second gas storage means 3-2.
The utility model discloses a theory of operation is:
firstly, the blower 1 is turned on to inflate the first gas storage device 3-1, and when the pressure monitoring device 2 on the first gas storage device 3-1 displays the pressure P 1 At this time, the blower 1 stops the charging and then the flow rate of the calibrated mass flow meter 5-1 is set to Qm 3 And h, opening a valve 6 on a first pipeline 8-1, simultaneously closing the valve 6 on a second pipeline 8-2, enabling the gas to pass through a calibrated mass flow meter 5-1 and a mass flow meter to be calibrated 5-2, driving a timing device 7 to simultaneously start timing, enabling the gas to flow from a first gas storage device 3-1 to a second gas storage device 3-2 through the first pipeline 8-1, gradually increasing the opening degree of the calibrated mass flow meter 5-1 along with the reduction of the pressure difference between two ends of the calibrated mass flow meter 5-1, ensuring that the set flow rate is unchanged, and when the calibrated mass flow meter 5-1 is suddenly reduced to 0, indicating that the pressure indications displayed by pressure monitoring devices 2 on the first gas storage device 3-1 and the second gas storage device 3-2 are equal, and ending timing at the moment, wherein the calibration time is Tmin.
Operating according to the method, closing the valve 6 on the first pipeline 8-1, and simultaneously opening the valve 6 on the second pipeline 8-2 to calibrate the mass flowmeter 5-2 to be calibrated, wherein the time is Tmin when the differential pressure between two ends of the mass flowmeter 5-2 to be calibrated is 0; at this time, the time when the to-be-calibrated mass flow meter 5-2 shows that the change is 0 is the same as the time when the calibrated mass flow meter 5-1 shows that the change is 0, which is Tmin, and the to-be-calibrated mass flow meter 5-2 meets the experimental requirements, so that the verification of the to-be-calibrated mass flow meter 5-2 is completed.
Operating in the manner described above, the first line 8-1 and the second line are opened simultaneouslyThe flow rates of the valve 6 on the 8-2, the calibrated mass flow meter 5-1 and the mass flow meter to be calibrated 5-2 are set to Qm 3 And h, when the differential pressure at the two ends of the two mass flowmeters is 0, the application time is T/2min, which shows that the calibrated mass flowmeter 5-1 and the mass flowmeter 5-2 to be calibrated both meet the experimental requirements, so that the calibration experiment of the gas flowmeter 5-2 to be calibrated can be realized by comparing the time parameters of the two flowmeters.
The utility model discloses still for the check of mass flow meter provides a check means during: the period check is an indispensable important link in a CNAS recognition system, other mass flowmeters are checked within the validity period of the calibration certificate, the checking mode is consistent with the calibration mode, each other mass flowmeter on the device needs to be calibrated by using the calibrated mass flowmeter 5-1, and whether the flowmeter generates out-of-range errors within the validity period of the calibration certificate is checked.
In addition, the device can further analyze whether the gas flowmeter has a blockage problem, and the specific operation is as follows: setting the flow of the mass flowmeter 5-2 to be calibrated to be Qm 3 H, closing the valve 6 on the first pipeline 8-1, opening the valve 6 on the second pipeline 8-2, starting timing by the timing device 7, gradually increasing the opening of the mass flow meter 5-2 to be calibrated along with the reduction of the pressure difference at the two ends of the mass flow meter 5-2 to be calibrated, ensuring that the set flow is not changed, and suddenly reducing the flow to Q 1 m 3 /h(Q 1 Less than Q), and the pressure difference between two ends of the mass flowmeter 5-2 to be calibrated is 0 after the mass flowmeter is operated for a period of time, and the time is T 1 min(T 1 Greater than T), which indicates that the mass flowmeter 5-2 to be calibrated has a certain clogging phenomenon and needs to be cleaned and recalibrated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A calibrating device of gas flowmeter which characterized in that: the automatic calibration device comprises an air blower, the air blower be connected with first gas storage device, first gas storage device is connected with the gaseous storage device of second through first pipeline and second pipeline respectively, first pipeline on set up calibrated mass flowmeter and valve, be provided with on the second pipeline and wait to calibrate mass flowmeter and valve, first gas storage device and second gas storage device on all be provided with pressure monitoring device, calibrated mass flowmeter with wait to calibrate mass flowmeter and all connect timing device.
2. The calibration device for a gas flowmeter according to claim 1, characterized in that: the valve is an adjustable valve.
3. The calibration device for a gas flowmeter according to claim 1, characterized in that: and filters are arranged on the first pipeline and the second pipeline.
4. The calibration device for a gas flowmeter according to claim 3, wherein: the filter is positioned at the front end of the calibrated mass flow meter and the mass flow meter to be calibrated.
5. The calibration device for a gas flowmeter according to claim 3 or 4, wherein: the filter is a Y-shaped filter.
6. The calibration device for a gas flowmeter according to claim 1, characterized in that: the first gas storage device and the second gas storage device are gas storage tanks.
7. The calibration device for a gas flowmeter according to claim 1, characterized in that: the timing device is a digital timer.
8. The calibration device for a gas flowmeter according to claim 6 or 7, wherein: the mass flowmeter to be calibrated is arranged on the fixing device of the laboratory mass flowmeter.
9. The calibration device for a gas flowmeter according to claim 1, characterized in that: the inlet ends of the first pipeline and the second pipeline are connected with the outlet end of a first common pipeline, and the inlet end of the first common pipeline is connected with a first gas storage device; the outlet ends of the first pipeline and the second pipeline are connected with the inlet end of a second common pipeline, and the outlet end of the second common pipeline is connected with a second gas storage device.
10. The calibration device for a gas flowmeter according to claim 9, wherein: a valve is arranged on a pipeline connecting the blower and the first gas storage device; valves are also arranged on the first common pipeline and the second common pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221814790.3U CN217900973U (en) | 2022-07-13 | 2022-07-13 | Gas flowmeter's calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221814790.3U CN217900973U (en) | 2022-07-13 | 2022-07-13 | Gas flowmeter's calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217900973U true CN217900973U (en) | 2022-11-25 |
Family
ID=84133570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221814790.3U Active CN217900973U (en) | 2022-07-13 | 2022-07-13 | Gas flowmeter's calibrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217900973U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117091679A (en) * | 2023-10-20 | 2023-11-21 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Gas flowmeter calibrating device and method |
-
2022
- 2022-07-13 CN CN202221814790.3U patent/CN217900973U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117091679A (en) * | 2023-10-20 | 2023-11-21 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Gas flowmeter calibrating device and method |
| CN117091679B (en) * | 2023-10-20 | 2024-03-22 | 济宁市质量计量检验检测研究院(济宁半导体及显示产品质量监督检验中心、济宁市纤维质量监测中心) | Gas flowmeter calibrating device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107421790B (en) | Gaseous pollutant multi-point matrix mixed sampling device, sampling method thereof and blowback maintenance method | |
| CN217900973U (en) | Gas flowmeter's calibrating device | |
| CN107631916A (en) | A kind of more dot matrix high-temperature sampling probes of gaseous contaminant | |
| CN103471876B (en) | Dilution sampling probe | |
| CN203758561U (en) | Metering device | |
| CN210514017U (en) | Calibration system of aerodynamic particle size spectrometer | |
| CN202974331U (en) | Multifunctional gas source testing apparatus | |
| CN103157320A (en) | Blockage detection method and blockage detection system for Y-type filter | |
| CN201408136Y (en) | Motor particle discharge secondary dilution and part flow dilution sampling constant-current device | |
| CN205228890U (en) | Particle counter sampling device | |
| CN212510529U (en) | Pipeline blockage checking device | |
| CN108195714A (en) | A kind of ammonia packing material absorbing experimental provision | |
| CN212837768U (en) | Device suitable for high yield oil well flow and moisture content monitoring | |
| CN210221167U (en) | Complex gas flow measurer | |
| TW201913062A (en) | Fluid sampling device | |
| CN106288228A (en) | A kind of monitoring device of central air-conditioning filter | |
| CN101839812B (en) | Method and device for testing primary purification efficiency of air purification component | |
| CN207181114U (en) | A kind of more dot matrix mixing sampling apparatuses of gaseous contaminant | |
| CN206387621U (en) | Flue gas CEMS gases pre-process integrated box | |
| CN206920371U (en) | Pretreatment system for the low explosion limit analyzers of CIC | |
| CN105352842A (en) | Gas dedusting fiber filter material PM2.5 dust filter characteristic test method | |
| CN215262673U (en) | Partial flow dilution sampling system | |
| CN110243424A (en) | Complicated gas flow measurement device and the method for controlling flow using it | |
| CN218121711U (en) | Filter cleanliness test mechanism capable of simulating working conditions | |
| CN220019122U (en) | Flue gas dilution module, flue gas treatment device and mercury concentration monitoring device in flue gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |