CN201408136Y - Motor particle discharge secondary dilution and part flow dilution sampling constant-current device - Google Patents
Motor particle discharge secondary dilution and part flow dilution sampling constant-current device Download PDFInfo
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- CN201408136Y CN201408136Y CN2009200738763U CN200920073876U CN201408136Y CN 201408136 Y CN201408136 Y CN 201408136Y CN 2009200738763 U CN2009200738763 U CN 2009200738763U CN 200920073876 U CN200920073876 U CN 200920073876U CN 201408136 Y CN201408136 Y CN 201408136Y
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- sampling
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Abstract
The utility model relates to a motor particle discharge secondary dilution and part flow dilution sampling constant-current device which comprises a motor particle discharge sampling pipe, a dilutionchannel and a sampling paper filter which are connected in turn, and further comprises a front voltage stabilizing box, a critical Venturi tube group, a valve group, a rear voltage stabilizing box and a critical tube which are connected in turn, wherein the outlet end of the sampling paper filter is connected with the inlet end of the front voltage stabilizing box. The utility model solves the problem in a motor particle discharge sampling system that constant flow capacity is difficult, which is caused by high exhaust temperature and high corrosion.
Description
Technical field
The utility model relates to engine particulate emission secondary dilution and part diluted stream sampling constant-current device.
Background technology
According to definition and the relevant measuring method of Environmental Protection Agency (EPA) to particle, when measuring particle, need in gas outlet, to gather sample gas earlier, mix with it to several clean airs that decuple sample gas with several times, be toxic emission dilution constant-volume sampling system (CVS),, gather the sample gas of diluted cooling subsequently again in the temperature that CVS reduces sample gas, the flow through filter paper of special substance and weigh up the weight difference of filter paper sampling front and back with accurate microbalance, this difference is granular mass.
According to diluted exhausted air quantity what, full stream and part diluted stream system are arranged.Part diluted stream system gathers from diesel exhaust gas and the proportional waste gas of extraction flow, introduces in the small-sized dilution tunnel, mixes with the clean air that enters the air channel, is cooled to less than after 51.7 ℃, and the material by the filter paper collection is particle.The Full flow dilution system is that the whole exhausts of diesel engine are passed to a caliber is in 18 inches the dilution tunnel.Use clean air greater than three times of exhaust gas flows to mix with it to dash and convert and dilute cooling, gather the dilution waste gas of certain flow subsequently again, again with the clean air hybrid cooling to less than 51.7 ℃ and the filter paper of flowing through, the material of collection is particle.
In engine particulate emission sampling system, no matter to flow entirely and part diluted stream system, constant current is a gordian technique.In the equipment that provides at present, adopted mass flow controller to add the mode of diaphragm pump at present both at home and abroad.Following problem is arranged in present this mode:
1, owing in the waste gas nitrogen oxide is arranged, gases such as sulphuric dioxide so be severe corrosive gas, have corrosive attack to pump, influence the life-span greatly;
2, delivery temperature is than higher, so the pump life-span is short;
3, adopt the mass flow controller control accuracy generally greater than 1%, so control accuracy is not high;
4, mass flow controller itself is the hot type principle, requires cleaning to measuring fluid, in case sensor is contaminated, its precision will reduce.
The utility model content
Technical problem to be solved in the utility model is: in order to overcome the constant rate difficulty that exhaust high temperature and high corrosion are brought, provide a kind of engine particulate emission secondary dilution and part diluted stream sampling constant-current device.
The utility model is achieved in that
Engine particulate emission secondary dilution and part diluted stream sampling constant-current device, comprise the engine particulate emission sampling pipe, dilution tunnel and the sampling filter paper device that link to each other successively, also comprise the preceding pressurizer tank that links to each other successively, critical Venturi tube group, valve sets, back pressurizer tank and critical pipe, the endpiece of described sampling filter paper device links to each other with the entrance point of described preceding pressurizer tank.
Be provided with pressure transducer and temperature sensor in the pressurizer tank before described, be provided with pressure transducer in the pressurizer tank of described back.
Described critical Venturi tube group is four critical Venturi tubes, and respectively with described valve sets in four valves link to each other one to one.
Pressurizer tank links to each other with a proving flowmeter before described.
Pressure transducer before described in the pressurizer tank links to each other with data acquisition controller respectively with pressure transducer in temperature sensor and the described back pressurizer tank.
Four valves in the described valve sets link to each other with data acquisition controller.
The beneficial effects of the utility model:
Critical pipe in the utility model engine particulate emission secondary dilution and the part diluted stream sampling constant-current device carries out injection by pressurized air, and pressure transducer makes critical Venturi tube reach critical conditions in the pressurizer tank of back by controlling.All sensor signals are input to data acquisition controller, data acquisition controller can have 12 acquisition channels at most, can carry out data processing and show real-time traffic, simultaneously instrument can the display medium pressure and temperature, and can be with real-time traffic by analog quantity and RS485 or the output of RS232 interface, real-time traffic can be a kind of of actual volume flow, mass rate, standard volume flow.Data acquisition controller can the by-pass valve control group, so that carry out the selection of constant current flow.
The utility model is applicable to the needs that various engine particulate emissions are measured; Constant Control Flow precision height, precision can reach ± and 0.2%; Because of adopting four critical Venturi tubes, can be combined into 15 kinds of different dilution total blast volumes; The indispensable equipment that can be used for part diluted stream system and the rare system of full stream, be used for part diluted stream system, the collecting part engine exhaust flows into dilution tunnel, is used for mixed dilution waste gas in the collecting part CVS of the Full flow dilution constant-volume sampling system dilution tunnel.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Description of drawings
Fig. 1 is the structural representation of the utility model engine particulate emission secondary dilution and part diluted stream sampling constant-current device.
Embodiment
According to Fig. 1, the utility model engine particulate emission secondary dilution and part diluted stream sampling constant-current device comprise the air strainer, dilution tunnel, sampling filter paper device, preceding pressurizer tank, critical Venturi tube group, valve sets, back pressurizer tank and the critical pipe that link to each other successively; Pressure transducer in pressure transducer in the wherein preceding pressurizer tank and temperature sensor, the back pressurizer tank and each valve in the valve sets all link to each other with data acquisition controller, and the preceding pressurizer tank while links to each other with a commercially available proving flowmeter.The critical Venturi tube that critical Venturi tube group adopts 316 stainless steels to make, employing standard " with critical Venturi nozzle measurement gas flow " (ISO9300,1999-08-15 (E)) is made, and by adopting injection principle to carry out constant current.Make up by four different critical Venturi tubes, produce 15 kinds of different steady flow values.
The mixed gas of gathering in engine particulate emission secondary dilution and the part diluted stream sampling constant-current device fully mixes with the air of certain constant temperature and humidity by air strainer in dilution tunnel, filter through over-sampling filter paper device, carry out constant current as follows, and enter atmosphere:
Sample gas → sampling filter paper device filtration → preceding pressurizer tank → critical Venturi tube group → valve sets → back pressurizer tank → critical pipe.
The volume of preceding pressurizer tank is greater than 2 liters, and by standard " with critical Venturi nozzle measurement gas flow " (ISO9300,1999-08-15 (E)) making, gaging pressure and temperature in preceding pressurizer tank are so that carry out the correction of constant current amount.
Critical Venturi tube group reaches local velocity of sound at critical Venturi tube aditus laryngis.Critical Venturi tube group can be made into different flows by the valve sets various combination, adapts to the engine needs of different sampling flows.
Critical pipe adopts general workshop pressurized air as source of the gas, by injection, adopts negative pressure at aditus laryngis, and aditus laryngis can guarantee enough pressure heads, and negative pressure is greater than 50kPa.
The volume of back voltage stabilizer is greater than 0.8 liter, makes by standard " of critical Venturi nozzle measurement gas flow " (ISO9300,1999-08-15 (E)).
Data acquisition controller is a kind of multifunctional controller that adopts 32-bit microprocessor and 5.6 inches TFT colour/monochrome LCDs, can select the TOCEIL-C3900 intelligent multi-function liquid crystal display apparatus of commercially available hanghai Tongyuan Environment Technology Co., Ltd for use.
Top embodiment only is used to the utility model is described and is not used in restriction scope of the present utility model that protection domain of the present utility model is described with claims of the present utility model and is as the criterion.Should be understood that in addition change or the modification of replacing various of equal value that those skilled in the art do the utility model falls within the utility model claims institute restricted portion equally after having read the content that the utility model tells about.
Claims (6)
- Engine particulate emission secondary dilution and part diluted stream the sampling constant-current device, comprise the engine particulate emission sampling pipe, dilution tunnel and the sampling filter paper device that link to each other successively, it is characterized in that: also comprise the preceding pressurizer tank that links to each other successively, critical Venturi tube group, valve sets, back pressurizer tank and critical pipe, the endpiece of described sampling filter paper device links to each other with the entrance point of described preceding pressurizer tank.
- 2. engine particulate emission secondary dilution according to claim 1 and part diluted stream sampling constant-current device is characterized in that: be provided with pressure transducer and temperature sensor in the pressurizer tank before described, be provided with pressure transducer in the pressurizer tank of described back.
- 3. engine particulate emission secondary dilution according to claim 1 and part diluted stream sampling constant-current device, it is characterized in that: described critical Venturi tube group is four critical Venturi tubes, and respectively with described valve sets in four valves link to each other one to one.
- 4. engine particulate emission secondary dilution according to claim 1 and part diluted stream sampling constant-current device, it is characterized in that: pressurizer tank links to each other with a proving flowmeter before described.
- 5. engine particulate emission secondary dilution according to claim 2 and part diluted stream sampling constant-current device is characterized in that: the pressure transducer before described in the pressurizer tank links to each other with data acquisition controller respectively with pressure transducer in temperature sensor and the described back pressurizer tank.
- 6. engine particulate emission secondary dilution according to claim 3 and part diluted stream sampling constant-current device, it is characterized in that: four valves in the described valve sets link to each other with data acquisition controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200738763U CN201408136Y (en) | 2009-05-06 | 2009-05-06 | Motor particle discharge secondary dilution and part flow dilution sampling constant-current device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200738763U CN201408136Y (en) | 2009-05-06 | 2009-05-06 | Motor particle discharge secondary dilution and part flow dilution sampling constant-current device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201408136Y true CN201408136Y (en) | 2010-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200738763U Expired - Lifetime CN201408136Y (en) | 2009-05-06 | 2009-05-06 | Motor particle discharge secondary dilution and part flow dilution sampling constant-current device |
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| CN (1) | CN201408136Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346105A (en) * | 2010-07-23 | 2012-02-08 | 株式会社堀场制作所 | Exhaust gas analyzing system |
| CN103018079A (en) * | 2012-11-07 | 2013-04-03 | 吉林大学 | Partial flow equivalently-dynamic diluting and sampling system for diesel engine exhaust particles and control method |
| CN106644611A (en) * | 2017-02-16 | 2017-05-10 | 大友（苏州）风洞技术有限公司 | Discharge sampling tester of engine plateau simulation system |
-
2009
- 2009-05-06 CN CN2009200738763U patent/CN201408136Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102346105A (en) * | 2010-07-23 | 2012-02-08 | 株式会社堀场制作所 | Exhaust gas analyzing system |
| CN102346105B (en) * | 2010-07-23 | 2016-08-24 | 株式会社堀场制作所 | Exhaust gas analysis system |
| CN103018079A (en) * | 2012-11-07 | 2013-04-03 | 吉林大学 | Partial flow equivalently-dynamic diluting and sampling system for diesel engine exhaust particles and control method |
| CN103018079B (en) * | 2012-11-07 | 2015-06-10 | 吉林大学 | Partial flow equivalently-dynamic diluting and sampling system for diesel engine exhaust particles and control method |
| CN106644611A (en) * | 2017-02-16 | 2017-05-10 | 大友（苏州）风洞技术有限公司 | Discharge sampling tester of engine plateau simulation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI TOCEIL ENGINE TESTING EQUIPMENT CO., LTD. Free format text: FORMER OWNER: SHANGHAI TONGYUAN ENGINES TEST ENGINEERING CO., LTD. Effective date: 20120808 Owner name: SHANGHAI TONGYUAN ENGINES TEST ENGINEERING CO., LT Effective date: 20120808 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200434 YANGPU, SHANGHAI TO: 200438 YANGPU, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120808 Address after: 200438 No. 518, Yue Yue Road, Yangpu District, Shanghai Patentee after: Shanghai Toceil Engine Testing Equipment Co., Ltd. Patentee after: Shanghai with a Round Engine Test Engineering Technology Co., Ltd. Address before: 200434, No. 821, Lane 9, government road, Shanghai, Yangpu District Patentee before: Shanghai with a Round Engine Test Engineering Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100217 |
|
| CX01 | Expiry of patent term |