CN105259083A - Dry laser particle size analyzer cyclone feeding apparatus - Google Patents
Dry laser particle size analyzer cyclone feeding apparatus Download PDFInfo
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- CN105259083A CN105259083A CN201410338530.7A CN201410338530A CN105259083A CN 105259083 A CN105259083 A CN 105259083A CN 201410338530 A CN201410338530 A CN 201410338530A CN 105259083 A CN105259083 A CN 105259083A
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Abstract
The present invention provides a dry laser particle size analyzer cyclone feeding apparatus, which comprises a feeding probe for sucking a sample, and a sample cup for holding a sample cup, wherein the upper end of the feeding probe is connected to a sample detection chamber, a vacuum pump and a powder recovery device to form an instrument particle detection circuit, the feeding probe is placed just above the sample cup, and the feeding probe extends into the sample cup to suck the sample powder so as to detect.
Description
Technical field
The present invention relates to the device that a kind of powder size is measured, particularly relate to the laser particle analyzer of the air-dry powder sampling device of a kind of tool Novel rotary.
Background technology
Laser particle analyzer, as a kind of novel testing graininess instrument, is widely used in powder processing, study and practice field.Laser particle analyzer is divided into drying measure and wet sample measurement, and for the powder granule that some is soluble in water, dry laser particle size analyzer can be measured it effectively.Dry laser particle size analyzer tradition sample introduction dispersing mode is that Venturi tube adds high pressure jet-impingement, namely by air compressor machine, clean air is sprayed generation quick flow at Venturi mesohigh, mix with air-flow while of dry powder sample and detect quickly through sample detection pond, the dispersion of powdered sample is mainly leaned on the friction force of particle self, is produced with the friction force of tube wall and the shearing force of turbulent air jet, the method has better effects for the dispersion sample introduction of majority reunion dry powder particle, and on Vehicles Collected from Market, dry laser particle size analyzer adopts this kind of method mostly.But for some frangible fine particle, if can not control the pressure of high pressure draught preferably, then particle can produce excess breakage in high pressure draught peptizaiton, affect the true granularity Detection result of particle.In addition, due to the jetting action of long-term high-pressure powder mixed airflow, the wearing and tearing of sample introduction tube wall can be caused.
Therefore, need to propose a kind of effective dry powder sample introduction disposal route to solve the problem.
Summary of the invention
The invention provides a kind of dry laser particle size analyzer whirlwind sampling device, this device comprises: the sample introduction for aspirated specimens is popped one's head in, for holding the sample cup of sample powder, this sample introduction probe upper end connects sample detection room and vacuum pump and powder recovering device, forms instrument particle detection loop; This sample introduction probe is placed in directly over this sample cup, and this sample introduction probe stretches into draw samples powder in this sample cup and detects.
Device as above, wherein, this sample introduction probe is cylindrical, hollow probe, and this sample introduction probe bottom is venturi tube structure.
Device as above, wherein, the periphery that this sample introduction is popped one's head in contains two symmetrical helicla flutes from top to bottom.
Device as above, wherein, leaves comparatively small gap when the external diameter that the internal diameter of this sample cup is greater than this sample introduction probe is to ensure that this sample introduction probe stretches into this sample cup.
Device as above, wherein, this sample cup has lifting and spinfunction.
A kind of dry laser particle size analyzer whirlwind sampling device of the present invention, sample introduction probe is fixed in above sample cup, probe upper end connects the sample detection room of instrument, powder recovering device and vacuum pump form signal piping, when vacuum pump startup is bled, sample cup rises, powder is inhaled into signal piping by the probe lower end import being placed in sample cup, because between probe and sample cup, gap is less, major part air sucks probe lower end import by the helicla flute of probe periphery, sample cup is along helicla flute rotating Vortex simultaneously, quick cyclone gas is formed in probe bottom, drive powder particle to form mixing cyclonic air flow simultaneously and together suck measure loop, powder particle disperses sample introduction by the friction force between intergranular shearing force and inner probe wall under the effect of cyclonic air flow, thus avoid excess breakage and the pipe wear problem of friable particle, simplify instrument sampling structure.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of dry laser particle size analyzer whirlwind sampling device;
Fig. 2 is outside drawing and the cut-open view of the sample introduction probe connector of dry laser particle size analyzer whirlwind sampling device and sample introduction probe;
Fig. 3 is the sample introduction probe outside drawing of dry laser particle size analyzer whirlwind sampling device.
Embodiment
Please refer to Fig. 1, is a kind of schematic diagram of dry laser particle size analyzer whirlwind sampling device.This dry laser particle size analyzer whirlwind sampling device comprises conduit 1, sample introduction probe connector 2, sample introduction probe 3, and sample cup 4, sample detection room 5, powder recovering device 6 and vacuum pump form signal piping.As shown in Figure 2, the bottom periphery of this probe connector 2 is provided with external thread, this sample introduction probe 3 upper end inner circumferential be provided with internal thread, this probe connector 2 and this sample introduction pop one's head in 3 be threaded fixing.As shown in Figure 3, be venturi tube structure bottom this sample introduction probe 3, periphery has two symmetrical helicla flutes 7 from top to bottom.This sample cup 4 is for holding sample, and the internal diameter of this sample cup 4 is less times greater than the external diameter of this sample introduction probe 3, and this sample cup 4 possesses rotation and elevating function.This sample introduction probe 3 is fixed in directly over this sample cup 4, and this sample introduction 4 upper ends of popping one's head in connect this sample detection rooms 5 of instruments, this powder recovering device 6 and this vacuum pump and form signal piping.
When carrying out dry powder sample and detecting, appropriate amount of sample is put into this sample cup 4, first the spinfunction of this sample cup 4 is started, then start vacuum pump to bleed, start the slow rising function of this sample cup 4 afterwards, powder sucks signal pipings by this sample introduction being placed in this sample cup 43 lower end imports of popping one's head in, because between this sample introduction probe 3 and this sample cup 4, gap is less, major part air sucks sample cup by the pop one's head in helicla flute 7 of 3 peripheries of this sample introduction, unique helicla flute 7 forms swirling eddy when air is entered bottom this sample introduction probe 3, this sample cup 4 now with this thread groove 7 screw thread rotating Vortex, quick cyclone gas is formed in the bottom of this sample introduction probe 3, drive powder particle to form whirlwind mixed airflow simultaneously and together suck signal piping, complete sample introduction function, the dispersion of powder particle is then completed by the friction force between intergranular shearing force and inner probe wall under the effect of cyclonic air flow.
This laser particle analyzer whirlwind sampling device proposed by the present invention effectively can be overcome conventional dry laser particle analyzer Venturi tube and to add high pressure the particle excess breakage that causes of jet-impingement dispersion input mode, affects testing result and sample channel wear problem.
Although describe the present invention in conjunction with specific embodiment, those skilled in the art will appreciate that and can make many amendments and modification to the present invention.Therefore, recognize, the intention of claims is to be encompassed in all such modifications in true spirit of the present invention and scope and modification.
Claims (5)
1. a dry laser particle size analyzer whirlwind sampling device, it is characterized in that: this device comprises: the sample introduction for aspirated specimens is popped one's head in, for holding the sample cup of sample powder, this sample introduction probe upper end connects sample detection room and vacuum pump and powder recovering device, forms instrument particle detection loop; This sample introduction probe is placed in directly over this sample cup, and this sample introduction probe stretches into draw samples powder in this sample cup and detects.
2. device as claimed in claim 1, wherein, this sample introduction probe is cylindrical, hollow probe, and this sample introduction probe bottom is venturi tube structure.
3. device as claimed in claim 1, wherein, the periphery that this sample introduction is popped one's head in contains two symmetrical helicla flutes from top to bottom.
4. device as claimed in claim 1, wherein, leaves comparatively small gap when the external diameter that the internal diameter of this sample cup is greater than this sample introduction probe is to ensure that this sample introduction probe stretches into this sample cup.
5. device as claimed in claim 1, wherein, this sample cup has lifting and spinfunction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338530.7A CN105259083A (en) | 2014-07-16 | 2014-07-16 | Dry laser particle size analyzer cyclone feeding apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410338530.7A CN105259083A (en) | 2014-07-16 | 2014-07-16 | Dry laser particle size analyzer cyclone feeding apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105259083A true CN105259083A (en) | 2016-01-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410338530.7A Pending CN105259083A (en) | 2014-07-16 | 2014-07-16 | Dry laser particle size analyzer cyclone feeding apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN105259083A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932276A (en) * | 2019-04-24 | 2019-06-25 | 中国烟草总公司郑州烟草研究院 | The measurement method and system of solid sample solubility in a kind of supercritical carbon dioxide |
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| CN101231219A (en) * | 2007-01-27 | 2008-07-30 | 深圳市百思特威工控设备有限公司 | Apparatus and method for sampling powder with middle-remote distance using pneumatic conveying mode |
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| CN201867327U (en) * | 2010-03-31 | 2011-06-15 | 范维林 | Rotating disk type dust aerosol generating device |
| JP2012118042A (en) * | 2010-11-09 | 2012-06-21 | Shimadzu Corp | Dry powder dispersion feeder and particle-size distribution measuring apparatus using the same |
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2014
- 2014-07-16 CN CN201410338530.7A patent/CN105259083A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020081748A1 (en) * | 2000-10-05 | 2002-06-27 | Roberts Daryl L. | Method and apparatus for automated operation of impactors |
| CN2557984Y (en) * | 2002-07-08 | 2003-06-25 | 珠海天威飞马打印耗材有限公司 | Carbon powder bottle |
| CN2645076Y (en) * | 2003-09-26 | 2004-09-29 | 成都精新粉体测试设备有限公司 | Laser particles size distribution tester |
| CN101231219A (en) * | 2007-01-27 | 2008-07-30 | 深圳市百思特威工控设备有限公司 | Apparatus and method for sampling powder with middle-remote distance using pneumatic conveying mode |
| CN201867327U (en) * | 2010-03-31 | 2011-06-15 | 范维林 | Rotating disk type dust aerosol generating device |
| CN101832903A (en) * | 2010-04-21 | 2010-09-15 | 江四义 | Granularity analysis device and method for analyzing granularity by using device |
| JP2012118042A (en) * | 2010-11-09 | 2012-06-21 | Shimadzu Corp | Dry powder dispersion feeder and particle-size distribution measuring apparatus using the same |
Non-Patent Citations (1)
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| 陈卫: "粉体粒度表征前处理的重要性——不可忽略的干法分散技术", 《2007年水泥技术交流大会暨第九届全国水泥技术交流大会论文集》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932276A (en) * | 2019-04-24 | 2019-06-25 | 中国烟草总公司郑州烟草研究院 | The measurement method and system of solid sample solubility in a kind of supercritical carbon dioxide |
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Application publication date: 20160120 |