JP2593678Y2 - Particle size distribution analyzer - Google Patents
Particle size distribution analyzerInfo
- Publication number
- JP2593678Y2 JP2593678Y2 JP1993047323U JP4732393U JP2593678Y2 JP 2593678 Y2 JP2593678 Y2 JP 2593678Y2 JP 1993047323 U JP1993047323 U JP 1993047323U JP 4732393 U JP4732393 U JP 4732393U JP 2593678 Y2 JP2593678 Y2 JP 2593678Y2
- Authority
- JP
- Japan
- Prior art keywords
- particles
- measured
- size distribution
- particle size
- dispersion tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Sampling And Sample Adjustment (AREA)
- Optical Measuring Cells (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、被測定粒子を媒液中に
分散させた懸濁液状態でレーザ回折・散乱法などの手法
によってその粒子の大きさの分布（粒度分布）を測定す
る湿式の粒度分布測定装置、特に、数百μｍからｍｍオ
ーダの粗粒子領域の粒度分布を測定する装置に関する。This invention measures the size distribution (particle size distribution) of particles to be measured in a suspension state in which the particles to be measured are dispersed in a medium by a method such as a laser diffraction / scattering method. The present invention relates to a wet type particle size distribution measuring apparatus, and particularly to an apparatus for measuring a particle size distribution in a coarse particle region of several hundred μm to mm order.
【０００２】[0002]
【従来の技術】一般的に、湿式の粒度分布測定装置で
は、懸濁液中における被測定粒子の濃度が低いため、特
に粗粒子領域の粒度分布を測定する場合は被測定粒子の
数が少なくなり、サンプリングエラーが生じやすい。2. Description of the Related Art Generally, in a wet type particle size distribution measuring device, the number of particles to be measured is small when measuring the particle size distribution particularly in a coarse particle region because the concentration of the particles to be measured in a suspension is low. And a sampling error is likely to occur.
【０００３】例えば、分散槽を含めた循環系に必要な媒
液量を１，０００ｃｍ2 、試料濃度（一般的にはレーザ
回折・散乱式では０．１ｖｏｌ％以下）を０．０５ｖｏ
ｌ％とすると、試料量は０．５ｃｍ3 となり、１ｍｍφ
の球とするとその被測定粒子の量（数）は ０．５÷｛４π／３・（０．０５）3 ｝＝９５５（個） となるので、単分数の試料でない限り、サンプリングエ
ラーが大きくなることは避けられない。[0003] For example, the amount of a medium necessary for a circulation system including a dispersion tank is 1,000 cm 2 , and the sample concentration (generally, 0.1 vol% or less in a laser diffraction / scattering method) is 0.05 vol.
1%, the sample amount becomes 0.5 cm 3 and 1 mmφ
In this case, the quantity (number) of the particles to be measured is 0.5 ÷ ｛4π / 3 · (0.05) 3 ｝ = 955 (pieces), so that the sampling error is large unless the sample is a single fraction. It is inevitable to become.
【０００４】なお、サンプリングエラーをなくするに
は、分割器などを用いた縮分により母集団と同じ分布を
もつサンプルを得る方法があるが、０．５ｃｍ3 程度ま
で縮分することは大変手間がかかるだけでなく、実際
上、適当な道具や方法がない。In order to eliminate the sampling error, there is a method of obtaining a sample having the same distribution as the population by a reduction using a divider or the like. However, it is very troublesome to reduce the sample to about 0.5 cm 3. In addition to the cost, there is no practical tool or method.
【０００５】[0005]
【考案が解決しようとする課題】そのために、従来の粒
度分布測定装置にあっては、被測定粒子数を増やすべく
大形の分散槽を用い、媒液量を増加させることにより結
果として被測定粒子の量（数）を増加していたので、例
えば、１０，０００個程度の粒子を測定するためには媒
液量が１０，０００ｃｍ3 以上となり、装置が大型にな
るだけでなく、使用される媒液量も極端に多くなる、と
いう問題点があった。Therefore, in the conventional particle size distribution measuring device, a large dispersion tank is used to increase the number of particles to be measured, and the amount of the medium is increased as a result. Since the amount (number) of the particles has been increased, for example, in order to measure about 10,000 particles, the amount of the medium becomes 10,000 cm 3 or more, which not only increases the size of the device, but also increases the size of the device. However, there is a problem that the amount of the liquid medium becomes extremely large.
【０００６】本考案は、媒液量を増加させることなく数
百μｍからｍｍオーダの粗粒子領域の粒度分布測定に対
応することができる粒度分布測定装置を提供することを
目的としている。SUMMARY OF THE INVENTION It is an object of the present invention to provide a particle size distribution measuring apparatus capable of measuring a particle size distribution in a coarse particle region on the order of hundreds of μm to mm without increasing the amount of a medium.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本考案の粒度分布測定装置では、被測定粒子が媒液
中に分散された懸濁液を分散槽から光路上に配置された
セル部を通じて再び分散槽へ戻す循環流路のセル部後段
の途中に懸濁液中の被測定粒子を捕集する手段を設ける
と共に、分散槽に所定量の被測定粒子を連続的に供給す
る装置を具備したものである。In order to achieve the above object, in the particle size distribution measuring apparatus of the present invention, a cell in which particles to be measured are dispersed in a medium is placed on a light path from a dispersion tank on a light path. A means for collecting the particles to be measured in the suspension in the middle of the cell section of the circulation channel which returns to the dispersion tank again through the section, and a device for continuously supplying a predetermined amount of the particles to be measured to the dispersion tank It is provided with.
【０００８】分散槽に所定量の被測定粒子を連続的に供
給する装置としては、振動フィーダが好適であるが、要
は微量の被測定粒子を定量的に供給することができるも
のであれば何でも良い。As a device for continuously supplying a predetermined amount of particles to be measured to the dispersion tank, a vibrating feeder is suitable, but it is essential that a device capable of supplying a small amount of particles to be measured quantitatively. anything is fine.
【０００９】[0009]
【作用】上記のように構成された本考案の粒度分布測定
装置では、光路上に配置されたセル部から再び分散槽へ
戻る循環流路の途中で懸濁液中の被測定粒子のみを捕集
し、媒液だけを分散槽に戻すと共に、分散槽に所定量の
被測定粒子を連続的に供給する。従って、被測定粒子数
を幾らでも増加させることが可能となる。In the particle size distribution measuring apparatus of the present invention having the above-described configuration, only the particles to be measured in the suspension are captured in the circulation flow path returning from the cell section arranged on the optical path to the dispersion tank again. Then, only the medium is returned to the dispersion tank, and a predetermined amount of particles to be measured is continuously supplied to the dispersion tank. Therefore, the number of particles to be measured can be increased arbitrarily.
【００１０】[0010]
【実施例】以下、本考案の粒度分布測定装置について図
面を参照して説明すると、図１において、レーザ光源１
からレーザ光をコリメータレンズ（図示せず）で平行に
してその光路上に配置されたセル部２、すなわち被測定
粒子（媒液に分散している粒子）に照射し、粒子の大き
さに依存した回折・散乱現象を起こさせ、その回折光・
散乱光をフォトセンサ３にて検出して、この情報から粒
度分布を求めるレーザ回折・散乱法に基づく測定系がセ
ル部２を挾んで配置されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A particle size distribution measuring apparatus according to the present invention will be described below with reference to the drawings.
The laser beam is irradiated by a collimator lens (not shown) on the cell unit 2 arranged on the optical path, that is, the particle to be measured (particles dispersed in the liquid medium), depending on the size of the particles. Caused the diffraction and scattering phenomenon
A measurement system based on a laser diffraction / scattering method for detecting scattered light with a photosensor 3 and obtaining a particle size distribution from this information is arranged with the cell portion 2 interposed therebetween.
【００１１】分散槽４には振動フィーダ５が付設されて
おり、同振動フィーダ５から所定量の被測定粒子が連続
的に供給され、分散槽４に設けたマグネチックスターラ
又はプロペラなどの攪拌機（図示せず）及び粒子分散性
を高めるための超音波振動子６の作用により、被測定粒
子と媒液とが均一に混合される。この被測定粒子を含む
懸濁液はポンプ７により上記測定系（セル部２）へ導か
れ、回折光・散乱光強度の分布の測定が行われる。A vibration feeder 5 is attached to the dispersion tank 4. A predetermined amount of particles to be measured is continuously supplied from the vibration feeder 5, and a stirrer (such as a magnetic stirrer or a propeller) provided in the dispersion tank 4 is provided. (Not shown) and the action of the ultrasonic vibrator 6 for improving the particle dispersibility, the particles to be measured and the medium are uniformly mixed. The suspension containing the particles to be measured is guided to the above-described measurement system (cell unit 2) by the pump 7, and the distribution of the diffracted light / scattered light intensity is measured.
【００１２】セル部２から出てきた被測定粒子を含む媒
液（懸濁液）はフィルタケース９に保持されたフィルタ
８により被測定粒子だけが捕集され、媒液は分散槽４へ
帰還され、再び振動フィーダ５から供給された被測定粒
子と均一に混合される。From the medium liquid (suspension) containing the particles to be measured coming out of the cell section 2, only the particles to be measured are collected by the filter 8 held in the filter case 9, and the medium is returned to the dispersion tank 4. Then, the particles are again uniformly mixed with the particles to be measured supplied from the vibration feeder 5.
【００１３】なお、分散槽４に設けられた気泡混入防止
板１０は、媒液をストレートに分散槽４へ落とすと気泡
が媒液に入ってセル部２に送られるので、フィルタ８か
らの媒液の流れを水平方向に変えてこれを防止するもの
である。When the medium is dropped straight into the dispersion tank 4, the bubbles enter the medium and are sent to the cell section 2. The flow of the liquid is changed in the horizontal direction to prevent this.
【００１４】[0014]
【考案の効果】本考案は以上説明したように構成されて
いるので、媒液量を増加させることなく被測定粒子の量
（数）を幾らでも増加させることができ、特に、数百μ
ｍからｍｍオーダの粗粒子領域の粒度分布測定において
サンプリングエラーを減少させることが可能となった。[Effects of the Invention] Since the present invention is configured as described above, the amount (number) of the particles to be measured can be increased without increasing the amount of the medium, and in particular, several hundred μm.
It has become possible to reduce the sampling error in the particle size distribution measurement in the coarse particle region on the order of m to mm.
【図１】本考案の粒度分布測定装置の概要を示す図であ
る。FIG. 1 is a diagram showing an outline of a particle size distribution measuring device of the present invention.
１…レーザ光源 ２…セル部 ３…フォトセンサ ４…分散槽 ５…振動フィーダ ６…超音波振
動子 ７…ポンプ ８…フィルタDESCRIPTION OF SYMBOLS 1 ... Laser light source 2 ... Cell part 3 ... Photosensor 4 ... Dispersion tank 5 ... Vibration feeder 6 ... Ultrasonic vibrator 7 ... Pump 8 ... Filter
Claims (1)
を分散槽から光路上に配置されたセル部に導き、同セル
部を通過した懸濁液を再び分散槽へ戻す循環流路を備
え、セル部からの回折光・散乱光を検出してその粒度分
布を測定する装置において、 セル部後段の循環流路の途中に懸濁液中の被測定粒子を
捕集する手段を設けると共に、分散槽に所定量の被測定
粒子を連続的に供給する装置を具備したことを特徴とす
る粒度分布測定装置。1. A circulation system in which a suspension in which particles to be measured are dispersed in a medium is guided from a dispersion tank to a cell disposed on an optical path, and the suspension passing through the cell is returned to the dispersion tank again. An apparatus for measuring a particle size distribution by detecting a diffracted light and a scattered light from a cell part, comprising a flow path, a means for collecting particles to be measured in a suspension in the middle of a circulation flow path at a stage subsequent to the cell part. And a device for continuously supplying a predetermined amount of particles to be measured to the dispersion tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993047323U JP2593678Y2 (en) | 1993-08-31 | 1993-08-31 | Particle size distribution analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1993047323U JP2593678Y2 (en) | 1993-08-31 | 1993-08-31 | Particle size distribution analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0716147U JPH0716147U (en) | 1995-03-17 |
| JP2593678Y2 true JP2593678Y2 (en) | 1999-04-12 |
Family
ID=12772058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1993047323U Expired - Fee Related JP2593678Y2 (en) | 1993-08-31 | 1993-08-31 | Particle size distribution analyzer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2593678Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI122102B (en) | 2010-02-12 | 2011-08-31 | Maricap Oy | Method and apparatus for treating material in a pneumatic tube conveying system |
-
1993
- 1993-08-31 JP JP1993047323U patent/JP2593678Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0716147U (en) | 1995-03-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |