CN107101688A - A kind of laminar-type gas flowmeter and scaling method - Google Patents
A kind of laminar-type gas flowmeter and scaling method Download PDFInfo
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- CN107101688A CN107101688A CN201710265856.5A CN201710265856A CN107101688A CN 107101688 A CN107101688 A CN 107101688A CN 201710265856 A CN201710265856 A CN 201710265856A CN 107101688 A CN107101688 A CN 107101688A
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- pressure
- laminar
- flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F9/00—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
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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
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention belongs to measurement technology, it is related to the improvement to gas flowmeter and the scaling method of gas flowmeter.The gas flowmeter of the present invention, it is characterised in that：It includes housing (1), end cap (2), glass yardage roll (3), first pressure sensor (4) and second pressure sensor (5).The step of scaling method of the present invention is：Determine gas medium；Determine metering device；Installation is calibrated laminar-type gas flowmeter；Bell-jar gas flow meter is inflated；Pressure differential and flow value homologous thread under nominal pressure value.The present invention proposes a kind of laminar-type gas flowmeter and scaling method, can easily become one with equipment test device, improve the measurement range and measurement accuracy of equipment test device.
Description
Technical field
The invention belongs to measurement technology, it is related to the improvement to gas flowmeter and the scaling method of gas flowmeter.
Background technology
Oxygen system and its part air tightness test, it is desirable to method of testing and flow that selection is adapted with testing range
Meter.Current orifice flowmeter, venturi meter, nozzle type flowmeter and spinner flowmeter, it is difficult to equipment test device collection
Be integrally formed, made troubles to test, in order to improve equipment test device measurement range and measurement accuracy, it is necessary to one kind be easy to
The gas flowmeter that equipment test device becomes one.
The content of the invention
The purpose of the present invention is：Propose a kind of laminar-type gas flowmeter and scaling method, so as to equipment test device collection
It is integrally formed, improves the measurement range and measurement accuracy of equipment test device.
The technical scheme is that：A kind of laminar-type gas flowmeter, it is characterised in that：It include housing 1, end cap 2,
Glass yardage roll 3, first pressure sensor 4 and second pressure sensor 5；There is one outlet to connect mouth at the center of the right side of housing 1
There is a high-pressure side pressure tappings 1b 1a, the position close to left side on the external cylindrical surface of housing 1, and first pressure sensor 4 is filled
On the external cylindrical surface of housing at the pressure tappings 1b of high-pressure side, there is a low-pressure side pressure tappings 1c on the external cylindrical surface of housing 1,
Second pressure sensor 5 has internal thread on the housing external cylindrical surface at the pressure tappings 1c of high-pressure side in the left port of housing 1,
The external screw thread of end cap 2 is combined with above-mentioned internal thread, and keeps sealing, and there is an air inlet at the center of end cap 2, is filled in housing 1
Full glass yardage roll 3；High-pressure side pressure tappings 1b axis and low-pressure side pressure tappings 1c axis apart from L1=0.8L2~0.9L2,
L2 is the axial length of the inner chamber of housing 1.
The scaling method of laminar-type gas flowmeter as described above, it is characterised in that as follows the step of demarcation：
1st, gas medium is determined；
2nd, metering device is determined：Demarcated using bell jar type gas flowmeter amount device；
3rd, install and be calibrated laminar-type gas flowmeter：Laminar-type gas flowmeter will be calibrated and be connected to bell-jar gas
In flow apparatus calibration system；
4th, bell-jar gas flow meter is inflated：By the bell jar gassy medium of bell-jar gas flow standard equipment
And certain pressure value is kept, loading line is turned off, the pressure value is recorded；Above-mentioned pressure value is to be calibrated laminar-type gas stream
The use pressure value of gauge；
5th, the pressure differential and flow value homologous thread under nominal pressure value：The switch in demarcation pipeline is opened, flow is adjusted
Valve is in a flow status, and the gas allowed in bell jar flows through the laminar-type gas flowmeter being calibrated, and records the gas in bell jar
The decrement of body volume and time used, the flow value under laminar-type gas flowmeter this flow status is calculated, meanwhile, note
The difference of first pressure sensor 4 and second pressure sensor 5 is recorded, the difference is corresponding with the above-mentioned flow value calculated, by this
Difference, as ordinate, is indicated in two-dimensional coordinate system as abscissa, flow value, is used as pressure differential and flow value homologous thread
On a point；Adjust flow valve and be in second flow status, according to the method described above, in pressure differential and flow value homologous thread
Second point of upper sign, the like, 10 points are at least indicated in pressure differential and flow value homologous thread, it is then in smoothing junction
Each sign point, forms pressure differential and flow value homologous thread.
It is an advantage of the invention that：A kind of laminar-type gas flowmeter and scaling method are proposed, easily can be tried with equipment
Test device to become one, improve the measurement range and measurement accuracy of equipment test device.
Brief description of the drawings
Fig. 1 is the structural representation of laminar-type gas flowmeter of the present invention.
Fig. 2 is the structural representation of glass yardage roll in the present invention.
Fig. 3 is the pressure differential and flow value homologous thread of embodiment 1.
Fig. 4 is the pressure differential and flow value homologous thread of embodiment 2.
Embodiment
The present invention is described in further details below.Referring to Fig. 1,2, a kind of laminar-type gas flowmeter, its feature exists
In：It includes housing 1, end cap 2, glass yardage roll 3, first pressure sensor 4 and second pressure sensor 5；In the right side of housing 1
Center there is one outlet to meet mouth 1a, have a high-pressure side pressure tappings close to the position of left side on the external cylindrical surface of housing 1
On 1b, the external cylindrical surface of housing of the first pressure sensor 4 at the pressure tappings 1b of high-pressure side, on the external cylindrical surface of housing 1
There is a low-pressure side pressure tappings 1c, second pressure sensor 5 is on the housing external cylindrical surface at the pressure tappings 1c of high-pressure side, in shell
The left port of body 1 has internal thread, and the external screw thread of end cap 2 is combined with above-mentioned internal thread, and keeps sealing, and the center of end cap 2 has one
Individual air inlet, fills up glass yardage roll 3 in housing 1；High-pressure side pressure tappings 1b axis and low-pressure side pressure tappings 1c axis
Apart from L1=0.8L2~0.9L2, L2 is the axial length of the inner chamber of housing 1.
The scaling method of laminar-type gas flowmeter as described above, it is characterised in that as follows the step of demarcation：
1st, gas medium is determined；
2nd, metering device is determined：Demarcated using bell jar type gas flowmeter amount device；
3rd, install and be calibrated laminar-type gas flowmeter：Laminar-type gas flowmeter will be calibrated and be connected to bell-jar gas
In flow apparatus calibration system；
4th, bell-jar gas flow meter is inflated：By the bell jar gassy medium of bell-jar gas flow standard equipment
And certain pressure value is kept, loading line is turned off, the pressure value is recorded；Above-mentioned pressure value is to be calibrated laminar-type gas stream
The use pressure value of gauge；
5th, the pressure differential and flow value homologous thread under nominal pressure value：The switch in demarcation pipeline is opened, flow is adjusted
Valve is in a flow status, and the gas allowed in bell jar flows through the laminar-type gas flowmeter being calibrated, and records the gas in bell jar
The decrement of body volume and time used, the flow value under laminar-type gas flowmeter this flow status is calculated, meanwhile, note
The difference of first pressure sensor 4 and second pressure sensor 5 is recorded, the difference is corresponding with the above-mentioned flow value calculated, by this
Difference, as ordinate, is indicated in two-dimensional coordinate system as abscissa, flow value, is used as pressure differential and flow value homologous thread
On a point；Adjust flow valve and be in second flow status, according to the method described above, in pressure differential and flow value homologous thread
Second point of upper sign, the like, 10 points are at least indicated in pressure differential and flow value homologous thread, it is then in smoothing junction
Each sign point, forms pressure differential and flow value homologous thread.
The glass yardage roll 3 is using the manufacture of JC170-73 glass cloth.
Axial length L 2=300mm~400mm of the inner chamber of housing 1.
Embodiment 1, high-pressure side pressure tappings 1b axis and low-pressure side pressure tappings 1c axis apart from L1=240mm, L2
=300mm.
1st, it is oxygen to determine gas medium；
2nd, metering device is determined：Demarcated using bell jar type gas flowmeter amount device；
3rd, install and be calibrated laminar-type gas flowmeter；
4th, bell-jar gas flow meter is inflated：By the bell jar gassy medium of bell-jar gas flow standard equipment
And keep pressure value to be 0.1MPa；
5th, the pressure differential and flow value homologous thread under nominal pressure value：The switch in demarcation pipeline is opened, flow is adjusted
Valve is in a flow status, and the gas allowed in bell jar flows through the laminar-type gas flowmeter being calibrated, and records the gas in bell jar
The decrement of body volume and time used, the flow value under laminar-type gas flowmeter this flow status is calculated, meanwhile, note
The difference of first pressure sensor 4 and second pressure sensor 5 is recorded, the difference is corresponding with the above-mentioned flow value calculated, by this
Difference, as ordinate, is indicated in two-dimensional coordinate system as abscissa, flow value, is used as pressure differential and flow value homologous thread
On a point；Adjust flow valve and be in second flow status, according to the method described above, in pressure differential and flow value homologous thread
Second point of upper sign, the like, 10 points are at least indicated in pressure differential and flow value homologous thread, it is then in smoothing junction
Each sign point, forms pressure differential and flow value homologous thread, referring to Fig. 3.
Embodiment 2, high-pressure side pressure tappings 1b axis and low-pressure side pressure tappings 1c axis apart from L1=360mm, L2
=400mm.
1st, it is air to determine gas medium；
2nd, metering device is determined：Demarcated using bell jar type gas flowmeter amount device；
3rd, install and be calibrated laminar-type gas flowmeter；
4th, bell-jar gas flow meter is inflated：By the bell jar gassy medium of bell-jar gas flow standard equipment
And keep pressure value to be 0.1MPa；
5th, the pressure differential and flow value homologous thread under nominal pressure value：The switch in demarcation pipeline is opened, flow is adjusted
Valve is in a flow status, and the gas allowed in bell jar flows through the laminar-type gas flowmeter being calibrated, and records the gas in bell jar
The decrement of body volume and time used, the flow value under laminar-type gas flowmeter this flow status is calculated, meanwhile, note
The difference of first pressure sensor 4 and second pressure sensor 5 is recorded, the difference is corresponding with the above-mentioned flow value calculated, by this
Difference, as ordinate, is indicated in two-dimensional coordinate system as abscissa, flow value, is used as pressure differential and flow value homologous thread
On a point；Adjust flow valve and be in second flow status, according to the method described above, in pressure differential and flow value homologous thread
Second point of upper sign, the like, 10 points are at least indicated in pressure differential and flow value homologous thread, it is then in smoothing junction
Each sign point, forms pressure differential and flow value homologous thread, referring to Fig. 4.
Claims (4)
1. a kind of laminar-type gas flowmeter, it is characterised in that：It includes housing (1), end cap (2), glass yardage roll (3), first
Pressure sensor (4) and second pressure sensor (5)；There is one outlet to connect mouth (1a) at the center of housing (1) right side, in shell
There is a high-pressure side pressure tappings (1b) position on the external cylindrical surface of body (1) close to left side, and first pressure sensor (4) is mounted in
On the external cylindrical surface of the housing at high-pressure side pressure tappings (1b) place, there are a low-pressure side pressure tappings on the external cylindrical surface of housing (1)
(1c), second pressure sensor (5) is on the housing external cylindrical surface at high-pressure side pressure tappings (1c) place, the left end in housing (1)
Mouth has internal thread, and the external screw thread of end cap (2) is combined with above-mentioned internal thread, and keeps sealing, and there is an air inlet at the center of end cap (2)
Mouthful, fill up glass yardage roll (3) in housing (1)；The axis of high-pressure side pressure tappings (1b) and the axis of low-pressure side pressure tappings (1c)
Apart from L1=0.8L2~0.9L2, L2 is the axial length of housing (1) inner chamber.
2. the scaling method of laminar-type gas flowmeter as claimed in claim 1, it is characterised in that as follows the step of demarcation：
2.1st, gas medium is determined；
2.2nd, metering device is determined：Demarcated using bell jar type gas flowmeter amount device；
2.3rd, install and be calibrated laminar-type gas flowmeter：Laminar-type gas flowmeter will be calibrated and be connected to bell-jar gas stream
Measure in device normalization system；
2.4th, bell-jar gas flow meter is inflated：By the bell jar gassy medium of bell-jar gas flow standard equipment simultaneously
Certain pressure value is kept, loading line is turned off, records the pressure value；Above-mentioned pressure value is to be calibrated laminar-type gas flow
The use pressure value of meter；
2.5th, the pressure differential and flow value homologous thread under nominal pressure value：The switch in demarcation pipeline is opened, flow valve is adjusted
In a flow status, the gas allowed in bell jar flows through the laminar-type gas flowmeter being calibrated, records the gas in bell jar
The decrement of volume and time used, the flow value under laminar-type gas flowmeter this flow status is calculated, meanwhile, record
The difference of first pressure sensor (4) and second pressure sensor (5), the difference is corresponding with the above-mentioned flow value calculated, will
The difference, as ordinate, is indicated in two-dimensional coordinate system as abscissa, flow value, corresponding with flow value bent as pressure differential
A point on line；Adjust flow valve and be in second flow status, it is according to the method described above, corresponding with flow value bent in pressure differential
Second point is indicated on line, the like, 10 points are at least indicated in pressure differential and flow value homologous thread, are then smoothly connected
Each sign point is connect, pressure differential and flow value homologous thread is formed.
3. laminar-type gas flowmeter according to claim 1, it is characterised in that：The glass yardage roll (3) uses
JC170-73 glass cloth is manufactured.
4. the laminar-type gas flowmeter according to claim 1 or 3, it is characterised in that：The axial length of housing (1) inner chamber
L2=300mm~400mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710265856.5A CN107101688B (en) | 2017-04-21 | 2017-04-21 | Laminar flow type gas flowmeter and calibration method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710265856.5A CN107101688B (en) | 2017-04-21 | 2017-04-21 | Laminar flow type gas flowmeter and calibration method |
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| Publication Number | Publication Date |
|---|---|
| CN107101688A true CN107101688A (en) | 2017-08-29 |
| CN107101688B CN107101688B (en) | 2020-04-07 |
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Citations (9)
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|---|---|---|---|---|
| CN2095404U (en) * | 1991-05-08 | 1992-02-05 | 陈秀兰 | Small volume flowmeter |
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2017
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| JP2001194193A (en) * | 2000-01-14 | 2001-07-19 | Oval Corp | Flow meter |
| JP3834534B2 (en) * | 2002-08-20 | 2006-10-18 | 東京メータ株式会社 | Flowmeter |
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| CN104010570A (en) * | 2011-12-27 | 2014-08-27 | 皇家飞利浦有限公司 | Respiratory measurement apparatus having integrated filter |
| CN203732104U (en) * | 2014-01-23 | 2014-07-23 | 合肥远智自动化科技有限公司 | Laminar flow tube used for flow detection of high temperature and high pressure gas |
| CN105258766A (en) * | 2015-11-19 | 2016-01-20 | 武汉海王机电工程技术公司 | Measurement device for continuous measurement gas flow meter, measurement system and measurement method |
| CN205280157U (en) * | 2015-12-28 | 2016-06-01 | 广州七喜医疗设备有限公司 | Differential pressure formula flow measurement mechanism |
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| CN107101688B (en) | 2020-04-07 |
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Address after: No. 35, Yan'an Road, Baohe Industrial Park, Hefei, Anhui 230051 Patentee after: Hefei Jianghang Aircraft Equipment Co.,Ltd. Address before: No. 35, Yan'an Road, Baohe Industrial Park, Hefei, Anhui 230051 Patentee before: HEFEI JIANGHANG AIRCRAFT EQUIPMENT Co.,Ltd. |
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