CN101726433B - Scaling sampling device of motor vehicle exhaust layer flow - Google Patents
Scaling sampling device of motor vehicle exhaust layer flow Download PDFInfo
- Publication number
- CN101726433B CN101726433B CN2009101538063A CN200910153806A CN101726433B CN 101726433 B CN101726433 B CN 101726433B CN 2009101538063 A CN2009101538063 A CN 2009101538063A CN 200910153806 A CN200910153806 A CN 200910153806A CN 101726433 B CN101726433 B CN 101726433B
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- sampling
- air flue
- exhaust
- ball valve
- valve rod
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Abstract
The invention discloses a scaling sampling device of a motor vehicle exhaust layer flow. The device is arranged on a base and comprises an air inlet pipe, a hole plate type air flow meter, a rectifying device, an electromagnetic type ball valve, a scaling shunting device, an exhaust air flow stabilizing box, an exhaust pump and a sampling pump. The device can control the sampling proportion, keep the sampling proportion constant, improve the measurement precision, control the state of fluid to be layer flows, monitor the flow states in a sampling air channel and an exhaust channel in real time and conveniently realize scaling sampling. In addition, the device has simple structure and low manufacture cost.
Description
Technical field
The present invention relates to a kind of exhaust certainty ratio device, relate in particular to a kind of scaling sampling device of motor vehicle exhaust layer flow.
Background technology
Flow control element is the key component of whole working condition method exhaust gas sampling system, and the exhaust gas sampling system at present adopts critical Venturi tube as flow control element, but is difficult to the dilution ratio of Adjustment System; The air capacity of automobile under different operating modes differs greatly, and adopts fixing Venturi tube, and dilution ratio can't adapt to different test requests; And adopt multiple venturi tube can increase use cost; In addition, gas pulsation is unstable, and this is very big to the measuring accuracy influence.
Summary of the invention
The objective of the invention is to provides a kind of scaling sampling device of motor vehicle exhaust layer flow to the prior art deficiency.
The objective of the invention is to realize: a kind of scaling sampling device of motor vehicle exhaust layer flow through following technical scheme; Be fixed by bolts on the ground, it comprises: draft tube, fairing, electromagnetic type ball valve, certainty ratio part flow arrangement, exhaust airstream are stablized case, off-gas pump, sampling pump; Draft tube, fairing, electromagnetic type ball valve, certainty ratio part flow arrangement, exhaust airstream are stablized case and are linked to each other with bolt successively from left to right; The orifice-plate type air flowmeter is installed in draft tube, and the honeycomb fashion rectifier has been installed in the inside of fairing; In sampling air flue in the certainty ratio part flow arrangement and the exhaust duct piezometric tube is installed all, piezometric tube, pressure measurement skirt link to each other with differential manometer successively; Exhaust airstream is stablized and is inserted with a continuous pipe of sampling air flue in the case, and a side of stablizing case at exhaust airstream is equipped with off-gas pump; Continuous pipe of sampling air flue and certainty ratio part flow arrangement are in the place's welding of sampling air flue, and the other end passes exhaust airstream and stablizes case and sampling pump is installed.
Further, described electromagnetic type ball valve comprises electromagnetic motor, valve rod limited block, spacing gland, valve rod, O-ring seal, O RunddichtringO, ball valve body and ball valve housing; Ball valve housing links to each other with the certainty ratio part flow arrangement and forms the cavity of ball valve, and is installed in the endpiece of fairing, and electromagnetic motor is consolidated with valve rod is coaxial; Valve rod passes spacing gland; Spacing gland is fixed on the ball valve housing, and the valve rod flange end is produced pressure, and the flange of valve rod is just in time embedded in the groove of ball valve body; The valve rod limited block is installed on the valve rod, and the valve rod limited block can be 90 ° and freely rotate between two positive stops on the spacing gland.
Further; Described certainty ratio part flow arrangement is evenly arranged N bar air flue along circumference; N is a natural number, wherein has an air flue to be the sampling air flue, and all the other air flues all are exhaust ducts; Radially outwards all be inserted with piezometric tube in sampling air flue and each bar exhaust duct, piezometric tube in the air flue of wherein taking a sample and the piezometric tube in its relative position exhaust duct all are connected on the interface of differential manometer through the pressure measurement skirt; Piezometric tube connector sealing in all the other exhaust ducts.Described electromagnetic type ball valve is evenly arranged on the circumference of fairing endpiece according to the number of air flue in the certainty ratio part flow arrangement.
The invention has the beneficial effects as follows:
1, can control sampling ratio, and keep sampling ratio constant, improve measuring accuracy;
2, can control fluid state is laminar flow, and to the flow state real time monitoring in sampling air flue and the exhaust duct, easily realizes constant volume samapling;
3, simple in structure, low cost of manufacture.
Description of drawings
Fig. 1 is a front elevation of the present invention;
Fig. 2 is a vertical view of the present invention;
Fig. 3 is a left view of the present invention;
Among Fig. 4, (a) with the left view and the cut-open view that (b) are respectively the certainty ratio part flow arrangement, wherein B-B is the vertical view of electromagnetic motor part;
Among the figure: 1, draft tube, 2, the orifice-plate type air flowmeter, 3, fairing, 4, the electromagnetic type ball valve, 5, certainty ratio part flow arrangement; 6, exhaust airstream is stablized case, and 7, off-gas pump, 8, sampling pump, 9, the pressure measurement skirt; 10, differential manometer, 11, the continuous pipe of sampling air flue, 12, exhaust duct, 13, the honeycomb fashion rectifier, 14, the sampling air flue; 15, piezometric tube, 16, electromagnetic motor, 17, the valve rod limited block, 18, spacing gland, 19, valve rod; 20, O-ring seal, 21, the O RunddichtringO, 22, ball valve body, 23, ball valve housing.
Embodiment
Specify the present invention according to accompanying drawing below, the object of the invention and effect will become more apparent.
As depicted in figs. 1 and 2, exhaust laminar flow certainty ratio sampler of the present invention comprises: draft tube 1, orifice-plate type air flowmeter 2, fairing 3, electromagnetic type ball valve 4, certainty ratio part flow arrangement 5, exhaust airstream are stablized case 6, off-gas pump 7, sampling pump 8.Draft tube 1 usefulness bolt is connected 3 inlet end of fairing, in the draft tube 1 near fairing 3 inlet ends, orifice-plate type air flowmeter 2 is installed; Honeycomb fashion rectifier 13 has been installed in the inside of fairing 3, and electromagnetic type ball valve 4 has connected the endpiece and the certainty ratio part flow arrangement 5 of fairing 3 through bolt; The other end of certainty ratio part flow arrangement 5 is stablized case 6 screw pairs with exhaust airstream and is connected, and exhaust airstream is stablized case interior 6 and is inserted with a continuous pipe 11 of sampling air flue, and a side of stablizing case 6 at exhaust airstream is equipped with off-gas pump 7; Continuous pipe 11 of sampling air flue and certainty ratio part flow arrangement 5 are in the 14 places welding of sampling air flue, and the other end passes exhaust airstream and stablizes case 6 and sampling pump 8 is installed.
Like Fig. 2, shown in Figure 4, electromagnetic type ball valve 4 comprises electromagnetic motor 16, valve rod limited block 17, spacing gland 18, valve rod 19, O-ring seal 20, O RunddichtringO 21, ball valve body 22, ball valve housing 23; Ball valve housing 23 and certainty ratio part flow arrangement 5 usefulness screw pairs are connected to form the cavity of ball valve, and are installed in the endpiece of fairing 3 with bolt; Electromagnetic motor 16 and valve rod 19 coaxial being consolidated, valve rod 19 passes spacing gland 18, and spacing gland 18 is fixed by bolts on the ball valve housing 23, and valve rod 19 flange end are produced pressure, and the flange of valve rod 19 is just in time embedded in the groove of ball valve body 22; Ball valve body 22 rotates in the cavity that ball valve housing 23 and certainty ratio part flow arrangement 5 form, doing 90 degree under the drive of valve rod 19, and valve rod limited block 17 is installed on the valve rod, and the height of two positive stops is consistent on the height of valve rod limited block 17 and the spacing gland 18; Positive stop becomes vertical configuration to be arranged on the bolt locating surface of spacing gland 18; Make valve rod 19 under electromagnetic motor 16 tractions, do 90 degree rotations, when promptly valve rod limited block 17 contacted with a positive stop, ball valve was closed; Gas can't flow into certainty ratio part flow arrangement 5; And valve rod limited block 17 is when contacting with another piece positive stop, and ball valve standard-sized sheet, gas can flow directly into certainty ratio part flow arrangement 5; Certainty ratio part flow arrangement 5 is evenly arranged N bar air flue along circumference; N is a natural number; Wherein there is an air flue to be sampling air flue 14; All the other air flues all are exhaust ducts 12, radially outwards all are inserted with piezometric tube 15 in sampling air flue 14 and each bar exhaust duct 12, and the piezometric tube 15 in the air flue 14 of wherein taking a sample all are connected on the interface of differential manometer 10 through pressure measurement skirt 9 with its relative position exhaust duct 12 interior piezometric tube 15; Piezometric tube 15 connectors sealing in all the other exhaust ducts.
Like Fig. 3, shown in Figure 4, electromagnetic type ball valve 4 is evenly arranged on the circumference of fairing 3 endpiece according to the number of air flue in the certainty ratio part flow arrangement 5.
The course of work of the present invention is following:
Exhaust feeds from air intake duct 1, during through orifice-plate type air flowmeter 2, and exhaust generation choke pressure drop, thus record the total flow of exhaust; Exhaust gets into fairing 3 subsequently, and behind the honeycomb fashion rectifier 13 through fairing 3 front ends, the flow velocity of exhaust is slowed down and makes it to remain on laminar condition; Because certainty ratio part flow arrangement 5 adopts identical materials to make the air flue of same diameter; And exhaust duct 12 has all been installed identical piezometric tube 15 with sampling in the air flue 14 and has been guaranteed that the structure of air flue is identical; In addition, air flue becomes to arrange that evenly the flow state that makes in each air flue is consistent as far as possible along circumference; Exhaust is through behind the electromagnetic type ball valve 4; Still keep laminar condition; And by confirming proportional flow through certainty ratio part flow arrangement 5, the differential manometer on the certainty ratio part flow arrangement 5 compares the flow state in the monitoring air flue with exhaust duct 12 and sampling air flue 14 interior pressure at any time; Part exhaust is discharged air flue after continuing pipe 11 via sampling air flue 14 and sampling air flue under the work of sampling pump 8; Remaining exhaust is stored in exhaust airstream earlier stablizes in the case 6, is deflated pump 7 subsequently and discharges outside the case, and casing can keep pressure, the temperature waiting status of exhaust in the air flue constant, has also reduced the influence of entrance effect to flow measurement; According to the flow size of exhaust can determine to open electromagnetic type ball valve 4 quantity what, and the ball valve that is held open as far as possible or closes is symmetric arrangement, makes the air flue flow field consistent as far as possible; In addition, through regulating the travelling speed of pump, the flowing velocity that can regulate exhaust is for gas flow provides power; Because sampling ratio is constant, can know that promptly when knowing total flow, the gas sampled flow is as long as just can obtain divided by the air flue number of opening according to the air flue number of opening; In addition, when fluid kept laminar condition, fluid flowed stable, so constant volume samapling is not only realized convenience, and measuring accuracy is high.
Claims (1)
1. scaling sampling device of motor vehicle exhaust layer flow; Be arranged on the ground; It is characterized in that it comprises: draft tube (1), orifice-plate type air flowmeter (2), fairing (3), electromagnetic type ball valve (4), certainty ratio part flow arrangement (5), exhaust airstream are stablized case (6), off-gas pump (7) and sampling pump (8); Said draft tube (1), fairing (3), electromagnetic type ball valve (4), certainty ratio part flow arrangement (5), exhaust airstream are stablized case (6) and are linked to each other successively; Orifice-plate type air flowmeter (2) is fixedly mounted on the draft tube (1), and honeycomb fashion rectifier (13) has been installed in the inside of fairing (3); In sampling air flue (14) in the certainty ratio part flow arrangement (5) and the exhaust duct (12) piezometric tube (15) is installed all, piezometric tube (15), pressure measurement skirt (9) link to each other with differential manometer (10) successively; Exhaust airstream is stablized case interior (6) and is inserted with a sampling continuous pipe of air flue (11), and a side of stablizing case (6) at exhaust airstream is equipped with off-gas pump (7); The sampling continuous pipe of air flue (11) is located to link to each other at sampling air flue (14) with certainty ratio part flow arrangement (5), and the other end passes exhaust airstream and stablizes case (6) and sampling pump (8) is installed; Described electromagnetic type ball valve (4) comprises electromagnetic motor (16), valve rod limited block (17), spacing gland (18), valve rod (19), O-ring seal (20), O RunddichtringO (21), ball valve body (22) and ball valve housing (23); Ball valve housing (23) links to each other with certainty ratio part flow arrangement (5) and forms the cavity of ball valve; And be installed in the endpiece of fairing (3); Electromagnetic motor (16) and coaxial being consolidated of valve rod (19), valve rod (19) passes spacing gland (18), and spacing gland (18) is fixed on the ball valve housing (23); And to valve rod (19) flange end generation pressure; The flange of valve rod (19) is just in time embedded in the groove of ball valve body (22), valve rod limited block (17) is installed on the valve rod, valve rod limited block (17) can be 90 ° and freely rotate between two positive stops on the spacing gland (18); Described certainty ratio part flow arrangement (5) is evenly arranged N bar air flue along circumference; N is a natural number; Wherein there is an air flue to be sampling air flue (14); All the other air flues all are exhaust duct (12), radially outwards all are inserted with piezometric tube (15) in sampling air flue (14) and each the bar exhaust duct (12), and the piezometric tube (15) in the air flue (14) of wherein taking a sample all is connected on the interface of differential manometer (10) through pressure measurement skirt (9) with the interior piezometric tube (15) of its relative position exhaust duct (12); Piezometric tube (15) connector sealing in all the other exhaust ducts; Described electromagnetic type ball valve (4) is evenly arranged on the circumference of fairing (3) endpiece according to the number of the interior air flue of certainty ratio part flow arrangement (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101538063A CN101726433B (en) | 2009-11-16 | 2009-11-16 | Scaling sampling device of motor vehicle exhaust layer flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101538063A CN101726433B (en) | 2009-11-16 | 2009-11-16 | Scaling sampling device of motor vehicle exhaust layer flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101726433A CN101726433A (en) | 2010-06-09 |
| CN101726433B true CN101726433B (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101538063A Expired - Fee Related CN101726433B (en) | 2009-11-16 | 2009-11-16 | Scaling sampling device of motor vehicle exhaust layer flow |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112743833A (en) * | 2020-12-15 | 2021-05-04 | 杭州德迪智能科技有限公司 | Gas powder supply device, three-dimensional printing equipment and gas powder supply method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184501A (en) * | 1991-05-03 | 1993-02-09 | Horiba Instruments Incorporated | Exhaust sampler and control means |
| JP2005091334A (en) * | 2003-09-22 | 2005-04-07 | Mitsubishi Electric Corp | Tritium measuring device |
| WO2006049434A1 (en) * | 2004-11-03 | 2006-05-11 | Konkuk University Industrial Cooperation Corp | Sample collection apparatus for analysis of air pollution compressing moisture pretreatment means |
| CN100427952C (en) * | 2004-09-28 | 2008-10-22 | 佛山分析仪有限公司 | Measuring device and its method for motor vehicle exhaust pollutant total amount |
-
2009
- 2009-11-16 CN CN2009101538063A patent/CN101726433B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184501A (en) * | 1991-05-03 | 1993-02-09 | Horiba Instruments Incorporated | Exhaust sampler and control means |
| JP2005091334A (en) * | 2003-09-22 | 2005-04-07 | Mitsubishi Electric Corp | Tritium measuring device |
| CN100427952C (en) * | 2004-09-28 | 2008-10-22 | 佛山分析仪有限公司 | Measuring device and its method for motor vehicle exhaust pollutant total amount |
| WO2006049434A1 (en) * | 2004-11-03 | 2006-05-11 | Konkuk University Industrial Cooperation Corp | Sample collection apparatus for analysis of air pollution compressing moisture pretreatment means |
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| Publication number | Publication date |
|---|---|
| CN101726433A (en) | 2010-06-09 |
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