CN205228890U - Particle counter sampling device - Google Patents
Particle counter sampling device Download PDFInfo
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- CN205228890U CN205228890U CN201520968596.4U CN201520968596U CN205228890U CN 205228890 U CN205228890 U CN 205228890U CN 201520968596 U CN201520968596 U CN 201520968596U CN 205228890 U CN205228890 U CN 205228890U
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Abstract
The utility model provides a can use the sampling device on particle counter, near the air speed that make to get into the air speed of thief hatch with the sampling point is the same. This particle counter sampling device is used for installing the main sampling head at particle counter, and the device at least still includes a branch sampling head, divide the sampling head through bushing on main sampling head, divide the sampling head to include wealthy air intake and narrow air outlet, and this narrow air outlet bore and main sampling head bore adaptation, divide and adopt rotatable coupling between sampling head and the sleeve pipe, divide the narrow air outlet of sampling head relative with main sampling head oral area after rotatory, will divide the sampling head connection at main sampling head front end.
Description
Technical field
The utility model relates to a kind of corpuscular counter sampling apparatus, also can be described as gas turbine inlet air filtration system device Performance Detection isokinetic sampling head, and main ancillary filter device Performance Detection experiment uses, and is applied to the industries such as generating, air strainer.
Background technology
The air filtering system testing laboratory of domestic existing university and research institution is mostly for industrial filter, is also invited to do the Performance Detection of some combustion engine air inlet filter cores once in a while; They are non-professional detections, also do not have by the qualification of the Third Party Authentication of government authorization; Sometimes some testing result can not be convincing.
At present, domesticly technical standard about gas turbine single-purpose filtering element and filter paper and test stone is not yet worked out.Need to set up one specially for the research institution of the whole inlet air filter system of gas turbine, first it in the face of national users, should make technical standard and the test stone of combustion engine air inlet filter core assembly; Then a whole set of design standards tackling the gas turbine inlet air filtration device of various environment or specification is made.
General industry ventilation filter Performance Detection all performs according to EN779 and ASHARE52.2 standard, and EN779 has detailed regulation structure as shown in Figure 1 to experiment table, comprising: 1-testing table pipeline section; 2-testing table pipeline section; The tested filtrator of 3-; 4-is containing the pipeline section of tested filtrator; 5-testing table pipeline section; 6-testing table pipeline section; 7-high efficiency particulate air filter (being not less than H13 level); 8-DEHS particle decanting point; 9-load dirt injection nozzle; 10-mixing orifice plate; 11-porous plate; 12-sampled upstream head; 13-sampled downstream head.
Experiment table adopts malleation or negative pressure, inlet end is equipped with high efficiency particulate air filter 7, filter the air entering pilot passageway, load dirt and gasoloid is sent out at collection chamber mixing section, air channel, upstream is entered after mixing orifice plate 10 and porous plate 11 mix, through tested filtrator 3, measure tested filtrator upstream and downstream aerosol particle concentration count efficiency, terminal filter weightening finish calculates tested filtrator arrestance efficiency and dust containing capacity.
Combustion engine inlet air filter system provides clean working medium for combustion engine, and the quality of working medium directly determines that can unit safe, reliable, efficiently run.The current current situation and problem of combustion engine inlet air filter system is mainly reflected on test stone and means of testing, and each unit adopts different means of testing to detect identical filtration unit, and acquired results is not quite similar.At present, each laboratory stand sampling head is all by a certain air quantity design, no longer change later, but the nominal air delivery of different filter test is different, if the air quantity of the nominal air delivery of tested filtrator and design experiment platform is inconsistent, can not realize isokinetic sampling, measured efficiency value distortion, even has influence on the grading of filtrator, therefore, current corpuscular counter sampling head can't meet actual needs.
Summary of the invention:
For prior art situation, a kind of sampling apparatus that can be applicable on corpuscular counter of the utility model design, makes the gas velocity entering thief hatch identical with the gas velocity near sampled point.
Concrete technical scheme of the present utility model is as follows:
A kind of corpuscular counter sampling apparatus, for being arranged on the main sampling head of corpuscular counter, this device at least also comprises a point of sampling head, described point of sampling head is connected on main sampling head through sleeve pipe, sampling head is divided to comprise wealthy air inlet and narrow air outlet, and this narrow air outlet bore and main sampling head bore adaptation, divide employing between sampling head and sleeve pipe to be rotatably connected, the air outlet that after rotating, point sampling head is narrow is relative with main sampling head oral area, and sampling head will be divided to be connected to main sampling head front end.
Further design of the present utility model is:
Described point of sampling head is provided with one to four.
The narrow air outlet bore of described three points of sampling heads all adopts 14mm (gas flow 3400m in corresponding adaptive air channel
3/ h), wealthy air inlet bore is respectively 15mm, 17mm and 25mm (gas flow 4000m in corresponding adaptive air channel respectively
3/ h, 2500m
3/ h and 1200m
3/ h).
Described point of sampling head preferred profile is frustum, and air outlet side external diameter is large, and air inlet side external diameter is little.
The described employing that is rotatably connected is hinged.
Described point of sampling head is hinged on described sleeve pipe by screw.
For the existing power form sampling head such as non-, if sample point gas flow rate is greater than peripheral gas flow velocity, then the particle in neighbouring space can be caused to be inhaled in thief hatch, make data compare actual value higher; If otherwise sample point gas flow rate is less than peripheral gas flow velocity, then data result can be made on the low side.Namely general straight pipe type sampling head is compared, it is completely the same that isokinetic sampling head of the present utility model can make in the suspended particulate matter concentration that collects and actual airflow, ensure that the true and reliable of sampled result, for the science of testing result, validity provide sound assurance.
The utility model specifically has the following advantages:
1, sampling apparatus of the present utility model adopts isokinetic sampling head, has the function regulating counter ability in sampling, can improve the sampling precision of corpuscular counter under different tests condition after installing this device additional.
2, this sampling apparatus is designed with the sampling head of different bore, can select for different air quantity, and when changing air quantity without the need to dismounting, conveniently can complete the replacing of different air quantity down-sampling head, avoid the test error because sampling flow difference causes, improve the accuracy of experimental data.
3, this device is easy to install, and can directly be socketed on former sampling pipe, convenient operation.And small volume, can not the air flow method in air channel be impacted.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of existing testing table.
Fig. 2 is structural representation of the present utility model.
Fig. 3 is the structural representation of of the present utility model point of sampling head.
Fig. 4 is the structural representation of the utility model embodiment two.
In Fig. 2-Fig. 3: the main sampling pipe of 1-; 2-sleeve pipe; The main sampling head of 3-; 4-divides sampling head; The air inlet that 41-is wealthy; The air outlet that 42-is narrow.
Embodiment:
Below in conjunction with accompanying drawing, the utility model will be further described:
Embodiment one:
The utility model, based on current combustion engine industry air intake filter examination criteria and special test experience platform, the corpuscular counter of supporting traditional E N779 standard testing equipment uses, is arranged on the sampling head of corpuscular counter during use.
As shown in Figure 2 and Figure 3, this device is for being arranged on the main sampling head 3 of corpuscular counter, and corpuscular counter to be connected with main sampling head 3 through main sampling pipe 1 samples for the utility model.This device comprises 120 °, three points of sampling heads, 4, three points of sampling head intervals and to be hinged on sleeve pipe 2 (point can establish web member between sampling head and sleeve pipe) by screw.Sleeve pipe 2 is sleeved on main sampling head 3, sampling head 4 is divided to include wealthy air inlet 41 and narrow air outlet 42, and narrow air outlet 42 bore of three points of sampling heads is equal all adaptive with main sampling head bore, the air inlet 42 bore difference that three point sampling heads are narrow, with the testing requirements of satisfied different air quantity.During use, rotated by a point of sampling head 4, its narrow air outlet 42 is relative with main sampling head oral area, sampling head 4 will be divided to be connected to main sampling head 3 front end, this point of sampling head can be used to sample.
Concrete using method of the present utility model is as follows:
During use, on the device upstream sampling head this device being arranged on Fig. 1 testing table and sampled downstream head, the air quantity according to setting selects suitable point sampling head, is buckled in the mouth of pipe place of original main sampling head.In experimentation, in air channel, air mass flow should be consistent with setting value, guarantees counter sample effect.After having tested, according to performance parameters such as the calculated Filter efficiency of upstream and downstream counter sampled result.
The bore of three points of sampling heads is different, and the test traffic that correspondence three kinds is different respectively, when test traffic is normal flow, can satisfy condition with main sampling head, and now, three points of sampling head location keep motionless with the position of main sampling head axes normal.When test traffic changes, when changing non-standard flow into, select point sampling head of correspondingly-sized along illustrated direction 90-degree rotation, point sampling head and main sampling head are aligned, use this point of sampling head sampling, ensure the accuracy of sampled data, two other point of sampling head location remains unchanged.After flow changes again, again select corresponding point of sampling head to repeat aforesaid operations process, real realize isokinetic sampling with regard to ensureing like this.
The sampling head device of corpuscular counter of the present utility model, sampling head device can be directly installed on original sampling pipe, to original damaging property of instrument and equipment change, can not be easy to regulation experiment scheme.At counter thief hatch, place installs this device additional, samples during counter works to air-flow, is provided with different sample states for different gas flow rates, expands the range of application of device, improves the accuracy of sampling.Sampling apparatus can adopt metal or non-metallic material, can adapt to all kinds of experimental enviroment such as high humidity, high salt, and be easy to disassembly, cleaning, avoid residual particulates to affect experimental result.
Embodiment two:
This example is on the basis of embodiment one, and the specific design bore of three points of sampling heads, the air outlet bore that wherein three points of sampling heads are narrow all adopts 14mm (gas flow 3400m in corresponding adaptive air channel
3/ h), wealthy air inlet bore is respectively 15mm, 17mm and 25mm (gas flow 4000m in corresponding adaptive air channel respectively
3/ h, 2500m
3/ h and 1200m
3/ h).Three points of sampling head profiles adopt frustum simultaneously, and air outlet side external diameter is large, and air inlet side external diameter is little, as shown in Figure 4, to meet principle of dynamics, reduce gas-flow resistance.
Embodiment three:
In this example, device is provided with two points of sampling heads, and 180 °, two points of sampling head intervals are arranged on sleeve pipe.All the other structures are with embodiment one.
Application example:
For the test of combustion engine inlet air filter system Φ 324 × 660mm filter cylinder, whole test process is as follows:
1, clean filtrator is installed tested filtrator 3 position in FIG, start the first resistance of the clean filtrator of fan test, regulate air quantity, measure the resistance of filtrator under 50%, 75%, 100% and 125% nominal air delivery, draw the relation curve of resistance and air quantity.According to standard-required setting air flow value after first resistance measurement completes, and sampling apparatus corresponding point of sampling head of corresponding the utility model embodiment two is selected to be buckled on main sampling head.Sending out the dirt stage, main sampling head rubber cap should be blocked, in order to avoid lint stoppage sampling head, destruction corpuscular counter.After repeatedly sending out dirt, the av eff in whole appearance dirt stage can be measured, calculate as follows:
A
m＝(1/M)×(A
1×M
1+A
2×M
2+A
3×M
3+A
4×M
4+……….+An×Mn)
Draw arrestance efficiency and the dust containing capacity of filtrator.DEHS gasoloid is sent out in twice dirt gap, now rubber cap should be taken off, by the quantity of counter sampled measurements upstream and downstream different-grain diameter particle, the meter footpath counting efficiency of testing filters, average counter efficiency according to
Formula calculates, and draws the average filtration efficiency of filtrator to different-grain diameter particle.
The utility model is the improvement to original sampling system, improves its measuring accuracy, expands service condition, has ensured the accuracy of filter test result, reliability.
Claims (7)
1. a corpuscular counter sampling apparatus, for being arranged on the main sampling head of corpuscular counter, it is characterized in that: this device at least also comprises a point of sampling head, described point of sampling head is connected on main sampling head through sleeve pipe, sampling head is divided to comprise wealthy air inlet and narrow air outlet, and this narrow air outlet bore and main sampling head bore adaptation, employing between sampling head and sleeve pipe is divided to be rotatably connected, the air outlet that after rotating, point sampling head is narrow is relative with main sampling head oral area, and sampling head will be divided to be connected to main sampling head front end.
2. corpuscular counter sampling apparatus according to claim 1, is characterized in that: described point of sampling head is provided with one to four.
3. corpuscular counter sampling apparatus according to claim 2, is characterized in that: described point of sampling head is provided with three, and 120 °, three points of sampling head intervals are arranged on described sleeve pipe.
4. corpuscular counter sampling apparatus according to claim 3, is characterized in that: the narrow air outlet bore of described three points of sampling heads all adopts 14mm, and wealthy air inlet bore is respectively 15mm, 17mm and 25mm.
5. corpuscular counter sampling apparatus according to claim 4, is characterized in that: described point of sampling head profile is frustum, and air outlet side external diameter is large, and air inlet side external diameter is little.
6. the corpuscular counter sampling apparatus according to claim 1,2,3,4 or 5, is characterized in that: described in be rotatably connected as hinged.
7. corpuscular counter sampling apparatus according to claim 6, is characterized in that: described point of sampling head is hinged on described sleeve pipe by screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520968596.4U CN205228890U (en) | 2015-11-30 | 2015-11-30 | Particle counter sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520968596.4U CN205228890U (en) | 2015-11-30 | 2015-11-30 | Particle counter sampling device |
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| CN205228890U true CN205228890U (en) | 2016-05-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478556A (en) * | 2017-09-15 | 2017-12-15 | 中天道成（苏州）洁净技术有限公司 | Online dust particle monitoring system based on dustless vent design |
| CN107588992A (en) * | 2016-07-07 | 2018-01-16 | 天津双允环保科技有限公司 | One kind is improved to wait Powered Air sampling head device |
-
2015
- 2015-11-30 CN CN201520968596.4U patent/CN205228890U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588992A (en) * | 2016-07-07 | 2018-01-16 | 天津双允环保科技有限公司 | One kind is improved to wait Powered Air sampling head device |
| CN107478556A (en) * | 2017-09-15 | 2017-12-15 | 中天道成（苏州）洁净技术有限公司 | Online dust particle monitoring system based on dustless vent design |
| CN107478556B (en) * | 2017-09-15 | 2024-03-05 | 中天道成（苏州）洁净技术有限公司 | Online dust particle counting monitoring system based on dust-free exhaust design |
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