CN202420928U - Sampling flow rate corrector of flue gas analyzer - Google Patents
Sampling flow rate corrector of flue gas analyzer Download PDFInfo
- Publication number
- CN202420928U CN202420928U CN201120464055XU CN201120464055U CN202420928U CN 202420928 U CN202420928 U CN 202420928U CN 201120464055X U CN201120464055X U CN 201120464055XU CN 201120464055 U CN201120464055 U CN 201120464055U CN 202420928 U CN202420928 U CN 202420928U
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- straight section
- flue gas
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- gas analyzer
- wind
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Abstract
The utility model relates to a sampling flow rate corrector of a flue gas analyzer, which comprises a wind tunnel; the wind tunnel is divided into a first straight section with a larger diameter, a second straight section with a smaller diameter, and a reducing section which is connected between the first and second straight sections; an axial flow fan is arranged at the inlet of the first straight section; a honeycomb and a resistance mesh are sequentially arranged at the tail of the first straight section along an airflow direction; a standard pitot tube and a temperature sensor are inserted into a uniform speed section of the second straight section; the standard pitot tube is connected with a micromanometer outside the wind tunnel through a hose; a through hole is arranged on the pipe wall of the uniform speed section of the second straight section; the pipe diameter of the through hole is enough for a sampling probe of the flue gas analyzer to be inserted in; and an observation window is arranged on the pipe wall, which is close to the through hole, of the second straight section. When the sampling flow rate corrector of the flue gas analyzer is used, the sampling flow rate of the flue gas analyzer can be corrected only by inserting the sampling probe of the flue gas analyzer into the uniform speed section of the wind tunnel.
Description
Technical field
The utility model relates to the calibration equipment of flue gas tester, relates in particular to the calibration equipment that is used to proofread and correct the flue gas tester sample flow.
Background technology
Flue gas tester is the gas analyzer that a kind of isokinetic sampling's of employing method is measured dust content in the flue gas.When measuring, the sampling flow velocity of flue gas tester (being the pumping speed of sampling pump) must equate with the flow velocity of flue gas.Yet, still being not used in the equipment of proofreading and correct flue gas tester sampling flow velocity at present, the sampling flow velocity of flue gas tester can only obtain according to Theoretical Calculation, and this has just restricted the measuring accuracy of flue gas tester.
The utility model content
The purpose of the utility model provides a kind of sampling flow velocity corrector of flue gas tester, to improve the measuring accuracy of flue gas tester.
The utility model is achieved in that a kind of sampling flow velocity corrector of flue gas tester; Comprise a wind-tunnel, this wind-tunnel is divided into the second less straight section of diameter bigger first straight section, diameter, and is connected the converging transition between first straight section and second straight section; Porch at first straight section is equipped with axial fan; Axial fan is connected with rotational speed governor, along airflow direction honeycomb and resistance net is housed successively at the afterbody of first straight section, is inserted with standard pitot tube and temperature sensor in the at the uniform velocity section of second straight section; Standard pitot tube is connected with the outer microbarograph of wind-tunnel through flexible pipe; On the tube wall of the at the uniform velocity section of second straight section, be provided with through hole, the caliber of through hole can supply the sampling probe of flue gas tester to insert, and on the tube wall near said through hole of second straight section, is provided with view window.
The beneficial effect of the utility model is: the wind speed in the at the uniform velocity section of wind-tunnel can accurately be regulated; And can learn at the uniform velocity the wind speed in the section through microbarograph and standard pitot tube; Need only the at the uniform velocity section that the sampling probe of flue gas tester is inserted into wind-tunnel, just can proofread and correct the sampling flow velocity of flue gas tester.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Referring to Fig. 1; The sampling flow velocity corrector of a kind of flue gas tester that provides according to the utility model; Comprise a wind-tunnel, this wind-tunnel is divided into diameter bigger first straight section 1, the second less straight section 2 of diameter, and is connected the converging transition 3 between first straight section 1 and second straight section 2.In the porch of first straight section 1 axial fan 4 is installed.Axial fan 4 is optional with power of motor 7.5kW, rotating speed 2850 commentaries on classics～3200 rev/mins, flow＞15000M
3The type of/h, total head>=1200Pa.Axial fan 4 is connected with rotational speed governor 5.Rotational speed governor 5 can adopt frequency converter.Can accurately regulate the rotating speed of axial fan 4 through rotational speed governor 5.Afterbody at first straight section 1 is equipped with honeycomb 6 and resistance net 7 successively along airflow direction.Honeycomb 6 and resistance net 7 play the effect of even wind speed.Resistance net 7 preferably adopts level Four two purpose resistance nets.
The internal diameter of second straight section 2 is 400mm.At the uniform velocity section at second straight section 2 is inserted with standard pitot tube 8 and temperature sensor 9, and standard pitot tube 8 is connected with the outer microbarograph 10 of wind-tunnel through flexible pipe.Second straight section 2 at the uniform velocity the section tube wall on be provided with through hole 11.But the sampling probe via through holes 11 of flue gas tester inserts in the wind-tunnel.On tube wall, be provided with view window 12, can see the position of sampling probe in wind-tunnel of flue gas tester through view window 12 near through hole 11.
As preferred forms, first straight section 1 of wind-tunnel is a steel pipe with converging transition 3, and second straight section 2 is a plastic tube, and the weight that so can alleviate wind-tunnel can be practiced thrift cost again.
Claims (3)
1. the sampling flow velocity corrector of a flue gas tester; It is characterized in that comprising a wind-tunnel; Said wind-tunnel is divided into less second straight section (2) of diameter bigger first straight section (1), diameter; And be connected the converging transition (3) between first straight section (1) and second straight section (2), and in the porch of first straight section (1) axial fan (4) being installed, axial fan (4) is connected with rotational speed governor (5); Afterbody at first straight section (1) is equipped with honeycomb (6) and resistance net (7) successively along airflow direction; At the uniform velocity section at second straight section (2) is inserted with standard pitot tube (8) and temperature sensor (9), and standard pitot tube (8) is connected with wind-tunnel microbarograph (10) outward through flexible pipe, on the tube wall at the uniform velocity section of second straight section (2), is provided with through hole (11); The caliber of through hole (11) can supply the sampling probe of flue gas tester to insert, and on the tube wall near said through hole (11) of second straight section (2), is provided with view window (12).
2. the sampling flow velocity corrector of flue gas tester as claimed in claim 1, it is characterized in that: described resistance net (7) is level Four two purpose resistance nets.
3. according to claim 1 or claim 2 the sampling flow velocity corrector of flue gas tester, it is characterized in that: first straight section (1) and the converging transition (3) of said wind-tunnel are steel pipe, and second straight section (2) is a plastic tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120464055XU CN202420928U (en) | 2011-11-21 | 2011-11-21 | Sampling flow rate corrector of flue gas analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120464055XU CN202420928U (en) | 2011-11-21 | 2011-11-21 | Sampling flow rate corrector of flue gas analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202420928U true CN202420928U (en) | 2012-09-05 |
Family
ID=46745682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120464055XU Expired - Fee Related CN202420928U (en) | 2011-11-21 | 2011-11-21 | Sampling flow rate corrector of flue gas analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202420928U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852610A (en) * | 2012-09-25 | 2013-01-02 | 安徽江淮汽车股份有限公司 | Pressure difference measuring system of automobile postprocessor |
| CN108562420A (en) * | 2017-12-26 | 2018-09-21 | 北京航天益森风洞工程技术有限公司 | A kind of automatic calibration system and method for porous probe |
| RU186769U1 (en) * | 2018-10-09 | 2019-01-31 | Общество с ограниченной ответственностью "Полимерные Композиционные Материалы - Алтай" | Device for straightening and measuring the flow rate in the ventilation system |
-
2011
- 2011-11-21 CN CN201120464055XU patent/CN202420928U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102852610A (en) * | 2012-09-25 | 2013-01-02 | 安徽江淮汽车股份有限公司 | Pressure difference measuring system of automobile postprocessor |
| CN108562420A (en) * | 2017-12-26 | 2018-09-21 | 北京航天益森风洞工程技术有限公司 | A kind of automatic calibration system and method for porous probe |
| RU186769U1 (en) * | 2018-10-09 | 2019-01-31 | Общество с ограниченной ответственностью "Полимерные Композиционные Материалы - Алтай" | Device for straightening and measuring the flow rate in the ventilation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20141121 |
|
| EXPY | Termination of patent right or utility model |