WO2021017673A1 - 一种带液体鞘流测量池的激光粒度分析仪 - Google Patents

一种带液体鞘流测量池的激光粒度分析仪 Download PDF

Info

Publication number
WO2021017673A1
WO2021017673A1 PCT/CN2020/096496 CN2020096496W WO2021017673A1 WO 2021017673 A1 WO2021017673 A1 WO 2021017673A1 CN 2020096496 W CN2020096496 W CN 2020096496W WO 2021017673 A1 WO2021017673 A1 WO 2021017673A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
flow
introduction
medium flow
medium
Prior art date
Application number
PCT/CN2020/096496
Other languages
English (en)
French (fr)
Inventor
张福根
Original Assignee
珠海真理光学仪器有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 珠海真理光学仪器有限公司 filed Critical 珠海真理光学仪器有限公司
Publication of WO2021017673A1 publication Critical patent/WO2021017673A1/zh
Priority to US17/578,553 priority Critical patent/US20220136955A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0205—Investigating particle size or size distribution by optical means
    • G01N15/0211—Investigating a scatter or diffraction pattern
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0205—Investigating particle size or size distribution by optical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/14—Optical investigation techniques, e.g. flow cytometry
    • G01N15/1404—Handling flow, e.g. hydrodynamic focusing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/14—Optical investigation techniques, e.g. flow cytometry
    • G01N15/1434—Optical arrangements
    • G01N15/1436—Optical arrangements the optical arrangement forming an integrated apparatus with the sample container, e.g. a flow cell
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/14—Optical investigation techniques, e.g. flow cytometry
    • G01N15/1456—Optical investigation techniques, e.g. flow cytometry without spatial resolution of the texture or inner structure of the particle, e.g. processing of pulse signals
    • G01N15/1459—Optical investigation techniques, e.g. flow cytometry without spatial resolution of the texture or inner structure of the particle, e.g. processing of pulse signals the analysis being performed on a sample stream
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/14—Optical investigation techniques, e.g. flow cytometry
    • G01N15/1404—Handling flow, e.g. hydrodynamic focusing
    • G01N15/1409—Handling samples, e.g. injecting samples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/14—Optical investigation techniques, e.g. flow cytometry
    • G01N2015/1493—Particle size
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions
    • G01N21/05—Flow-through cuvettes
    • G01N2021/052—Tubular type; cavity type; multireflective

Definitions

  • the invention relates to the technical field of particle testing instruments, in particular to a laser particle size analyzer with a liquid sheath flow measuring cell.
  • the laser particle size analyzer uses the light scattering (diffraction) phenomenon of particles to measure the particle size and distribution.
  • the measured particles should be dispersed in a liquid or gas medium.
  • FIG 1 This figure is a classic principle diagram of measuring particles suspended in a liquid.
  • the device used to disperse the measured particles is called a "measuring cell". It is composed of glass 1 and glass 2 on both sides and supports the two respectively.
  • the frame 3 and the frame 4 of a sheet of glass are composed of a particle group composed of thousands of monomer particles.
  • the particles and the liquid medium are often in an appropriate concentration Mix together and flow through the aforementioned measuring cell.
  • the arrow direction 5 in Figure 1 indicates the flow direction or particle flow of the particles
  • the parallel laser beam 6 passes through the glass 1 and irradiates the particle flow in the measuring cell. If the laser beam encounters particles, it will scatter.
  • the scattered light passes through the glass 2 and is focused by the Fourier lens 7.
  • the detector array 8 is located on the focal plane of the Fourier lens 7, so the scattered light in the same direction is focused on the same position of the detector array 8.
  • the array 8 is composed of dozens of detection units. Each unit represents a range of scattering angles.
  • the detection unit converts the light signal projected on it into an electric signal. Therefore, the arrangement of the electric signal output by the detector array 8 represents the scattered light.
  • the subsequent computer can inversely calculate the particle size distribution of the measured particles according to the scattered light distribution information; while the laser beam that is not scattered by the particles is focused by the Fourier lens 7 to the small hole in the center of the detector array 8 The laser beam passes through the small hole and is received by the central detector 9 for detecting the concentration of particles in the measuring cell.
  • the current wet measuring cell must be designed as a removable and washable structure. Frequently cleaning the inner walls of glass 1 and glass 2 is troublesome and time-consuming; in addition, installing and resetting glass 1 and glass 2 after disassembly and cleaning will cause the entire optical system to be out of adjustment, so it is necessary to re-adjust the optical system. Re-measurement is extremely inconvenient to use, and it reduces the life of the measuring cell.
  • the present invention provides a laser particle size analyzer with a liquid sheath flow measuring cell, which solves the inconvenience of operation due to the need to disassemble and clean the test glass of the measuring cell in the prior art, and the optical system is out of adjustment after resetting.
  • Technical problems to avoid contamination of the measuring cell during the measurement process, to achieve the technical effect of long service life of the measuring cell, simple operation and good use effect.
  • a laser particle size analyzer with a liquid sheath flow measuring cell includes a measuring cell.
  • the measuring cell includes a particle flow introducing cavity, a medium flow introducing cavity, and a measuring glass cavity, wherein the medium flow introducing cavity is connected to the measuring cell.
  • the upper part of the glass cavity; the medium flow introduction cavity is annularly arranged on the periphery of the particle flow introduction cavity, and a gap is formed between the medium flow introduction cavity and the particle flow introduction cavity, and the medium flow flows into the space from the gap In the measuring glass cavity, the particle flow flows from the particle flow introduction cavity into the measuring glass cavity.
  • outlet of the particle flow introduction cavity is inclined and narrowed downward relative to the particle flow introduction cavity.
  • the measuring cell further includes a discharge pipe, and the outlet of the measuring glass cavity is connected to the discharge pipe.
  • the measurement cell further includes a medium flow introduction auxiliary cavity, wherein the inlet of the medium flow introduction cavity is accommodated in the medium flow introduction auxiliary cavity, and the outlet of the medium flow introduction cavity is connected to the measurement glass cavity Inlet; the side of the medium flow introduction auxiliary cavity is provided with a medium introduction opening, the medium introduction opening is located below the inlet of the medium flow introduction cavity, and the medium flow enters the medium flow introduction from the medium introduction opening Auxiliary cavity; the inlet of the particle flow introduction cavity extends from the top of the medium flow introduction auxiliary cavity, and the outlet of the particle flow introduction cavity extends into the measuring glass cavity.
  • the tube inlet of the medium flow introduction cavity is accommodated in the cavity above the middle of the medium flow introduction auxiliary cavity.
  • the medium flow introduction cavity and the medium flow introduction auxiliary cavity are integrally formed.
  • the measuring glass cavity is configured as a round tubular glass tube.
  • the medium flow introduction cavity is configured as a circular tubular medium flow introduction cavity
  • the particle flow introduction cavity is configured as a circular tubular particle flow introduction cavity
  • the medium flow introduction auxiliary cavity is configured as a circular tubular medium flow introduction tube.
  • the measuring glass cavity includes two plates of flat glass and a fixing frame for fixing the two plates of flat glass.
  • the medium flow introduction cavity is set as an oblong tubular medium flow introduction cavity
  • the particle flow introduction cavity is set as an oblong tubular particle flow introduction cavity
  • the medium flow introduction auxiliary cavity is set as an oblong tubular medium flow introduction tube.
  • the laser particle size analyzer with a liquid sheath flow measuring cell includes a measuring cell.
  • the measuring cell includes a particle flow introduction cavity, a medium flow introduction cavity and a measuring glass cavity, wherein the medium flow introduction cavity is connected to the measuring glass cavity
  • the medium flow introduction cavity is ringed on the outer periphery of the particle flow introduction cavity, and a gap is formed between the medium flow introduction cavity and the particle flow introduction cavity, the medium flow flows into the measuring glass cavity from the gap, and the particle flow flows into the measuring glass from the particle flow introduction cavity Cavity.
  • the particle flow flows from the particle flow introduction cavity into the measuring glass cavity.
  • the particle flow introduction cavity penetrates the medium flow introduction cavity, the particle flow passes through the measurement glass cavity.
  • the medium flow flows into the measuring glass cavity from the gap, and the medium flow forms a sheath flow that surrounds the particle flow and has a uniform flow rate, which can ensure that the particle flow does not touch the inner wall of the measuring glass cavity during the flow measurement process, thereby keeping it clean.
  • Disassembly and cleaning that is to say, in the process of particle flow passing through the measuring glass cavity, both sides (around) are always covered by the clean medium flow, just like a knife is wrapped by a scabbard, so as to protect the measuring glass cavity. The effect of being contaminated.
  • the invention provides a laser particle size analyzer with a liquid sheath flow measuring cell, which solves the technical problems of inconvenient operation caused by the need to disassemble and clean the test glass of the measuring cell in the prior art, and the optical system misalignment after resetting, and avoid measurement during measurement
  • the pool is contaminated, which achieves the technical effect of long service life of the measuring pool, simple operation and good use effect.
  • Fig. 1 is a schematic diagram of the measurement of particles suspended in liquid in the prior art
  • FIG. 2 is a schematic diagram of a laser particle size analyzer with a liquid sheath flow measuring cell according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a laser particle size analyzer with a liquid sheath flow measuring cell according to the second embodiment of the present invention.
  • Figure 4 is a cross-sectional view of A-A in Figure 3;
  • Figure 5 is a B-B sectional view of Figure 3;
  • FIG. 6 is a schematic diagram of a laser particle size analyzer with a liquid sheath flow measuring cell according to an embodiment of the present invention
  • Figure 7 is a cross-sectional view taken along line A-A of Figure 6;
  • Fig. 8 is a B-B cross-sectional view of Fig. 6.
  • FIG. 2 is a schematic diagram of a laser particle size analyzer with a liquid sheath flow measuring cell according to an embodiment of the present invention.
  • the laser particle size analyzer with a liquid sheath flow measuring cell includes a measuring cell.
  • the measuring cell includes a particle flow introduction cavity 3000, a medium flow introduction cavity 1000 and a measuring glass cavity 2000, wherein the medium flow introduction cavity 1000 is connected to The upper part of the measuring glass cavity 2000; the medium flow introduction cavity 1000 is arranged around the outer periphery of the particle flow introduction cavity 3000, and a gap is formed between the medium flow introduction cavity 1000 and the particle flow introduction cavity 3000, and the medium flow 70 flows into the measurement glass cavity 2000 from the gap ,
  • the particle flow 60 flows from the particle flow introduction cavity 3000 into the measuring glass cavity 2000.
  • the particle flow 60 flows from the particle flow introduction cavity 3000 into the measuring glass cavity 2000. Since the particle flow introduction cavity 3000 penetrates the medium flow introduction cavity 1000, the particle flow 60 While measuring the glass cavity 2000, the medium flow 70 flows from the gap 607 into the measuring glass cavity 2000. The velocity of the medium flow 70 is greater than the velocity of the particle flow 60, and the medium flow 70 can form a sheath flow that surrounds the particle flow 60 and has a uniform velocity. It is ensured that the particle flow 60 does not touch the inner wall of the measuring glass cavity 2000 during the flow measurement, so that it is kept clean without disassembly and cleaning.
  • both sides (around the ) Is always wrapped by the clean medium stream 70, just like a knife is wrapped by a scabbard, in order to achieve the effect of protecting the measuring glass chamber 2000 from contamination.
  • the outlet of the particle flow introduction cavity 3000 in this embodiment is inclined and narrowed downward relative to the particle flow introduction cavity 3000, which further ensures that the particle flow 60 does not occur during flow measurement. It hits the inner wall of the measuring glass chamber 2000.
  • the measuring cell of this embodiment further includes a discharge pipe, and the outlet of the measuring glass chamber 2000 is connected to the discharge pipe.
  • the structure of the discharge pipe is not specifically limited. For example, it may be a funnel tube or a round pipe, preferably a hose, to facilitate the adjustment of the discharge direction.
  • FIG. 3 is a schematic diagram of a laser particle size analyzer with a liquid sheath flow measuring cell according to the second embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of A-A in FIG. 3
  • FIG. 5 is a cross-sectional view of B-B in FIG.
  • the laser particle size analyzer with a liquid sheath flow measuring cell includes a measuring cell.
  • the measuring cell includes a medium flow introducing cavity 10 and a measuring glass.
  • the inlet 11 of the medium flow introduction cavity 10 is contained in the medium flow introduction auxiliary cavity 40, preferably, the medium flow introduction cavity 10
  • the inlet 11 is accommodated in the cavity above the middle of the medium flow introduction auxiliary cavity 40, the outlet 12 of the medium flow introduction cavity 10 is connected to the inlet 21 of the measuring glass cavity 20; the side of the medium flow introduction auxiliary cavity 40 is provided with a medium introduction opening 41, The medium introduction opening 41 is located below the inlet 11 of the medium flow introduction cavity 10.
  • the medium flow 70 enters the medium flow introduction auxiliary cavity 40 from the medium introduction opening 41; the particle flow introduction cavity 30 penetrates the medium flow introduction cavity 10, and the particles
  • the inlet 31 of the flow introduction cavity 30 extends from the top of the medium flow introduction auxiliary cavity 40, the outlet 32 of the particle flow introduction cavity 30 extends into the measuring glass cavity 20, and the particle flow 60 flows from the particle flow introduction cavity 30 into the measuring glass cavity 20.
  • the medium flow 70 enters the medium flow introduction auxiliary cavity 40 from the medium introduction opening 41, and then flows upward along the outer wall of the medium flow introduction cavity 10 until it reaches the medium flow introduction The top of the outer wall of the cavity 10 is even higher.
  • the medium flow 70 flows downward from the inlet 11 of the medium flow introduction cavity 10 into the medium flow introduction cavity 10, and then flows into the measuring glass cavity 20; while the particle flow 60 flows from the particle
  • the flow introduction cavity 30 flows into the measuring glass cavity 20. Since the particle flow introduction cavity 30 penetrates the medium flow introduction cavity 10, while the particle flow 60 passes through the measuring glass cavity 20, the medium flow 70 also flows into the measuring glass cavity 20.
  • the speed of the medium flow 70 is greater than the speed of the particle flow 60, and the medium flow 70 can form a sheath flow that surrounds the particle flow 60 and has a uniform flow rate, which can ensure that the particle flow 60 does not touch the inside of the measuring glass cavity 20 during the flow measurement.
  • the wall surface is kept clean without disassembly and cleaning. That is to say, when the particle flow 60 passes through the measuring glass chamber 20, both sides (around) are always wrapped by the clean medium flow 70.
  • the laser particle size analyzer with a liquid sheath flow measuring cell provided by the present invention solves the technical problems of inconvenience in operation due to the need to disassemble and clean the test glass of the measuring cell in the prior art and the optical system imbalance after resetting, and avoid the measuring cell in the measurement process It is contaminated to achieve the technical effect of long service life of the measuring cell, simple operation and good use effect.
  • the outlet 32 of the particle flow introduction cavity 30 in this embodiment is inclined downwardly and narrowed relative to the particle flow introduction cavity 30, which further ensures that the particle flow 60 is not in the flow measurement process. It will hit the inner wall surface of the measuring glass cavity 20.
  • the inner diameter of the measuring glass cavity 20 and the inner diameter of the medium flow introduction cavity 10 are equal, so that the medium flow 70 smoothly flows from the medium flow introduction cavity 10 into the measuring glass cavity 20 and facilitates the medium flow.
  • the flow 70 forms a sheath flow that surrounds the particle flow 60 and has a uniform flow rate, which further ensures that the particle flow 60 does not touch the inner wall surface of the measuring glass chamber 20 during the flow measurement process, thereby keeping it clean without disassembly and cleaning.
  • the medium flow introduction auxiliary cavity 40 and the medium flow introduction cavity 10 in this embodiment are integrally formed to simplify the processing technology.
  • the measuring glass cavity 20 of this embodiment includes two pieces of flat glass oppositely arranged, which are flat glass 23 and flat glass 24, respectively.
  • the measuring glass cavity 20 also includes a fixing frame for fixing the flat glass 23 and the flat glass 24. Ensure the accuracy of measurement.
  • the medium flow introduction cavity 10 is set as an oblong tubular medium flow introduction cavity
  • the particle flow introduction cavity 30 is set as an oblong tubular particle flow introduction cavity
  • the medium flow introduction auxiliary cavity 40 is set as an oblong tubular medium flow introduction pipe
  • the measuring cell of this embodiment further includes a discharge pipe 50, and the outlet 22 of the measuring glass chamber 20 is connected to the discharge pipe.
  • the structure of the tube 50 and the discharge tube 50 is not specifically limited. For example, it may be a funnel tube or a round tube, preferably a hose, to facilitate the adjustment of the discharge direction.
  • FIG. 6 is a schematic diagram of a laser particle size analyzer with a liquid sheath flow measuring cell according to an embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of A-A in FIG. 6, and
  • FIG. 8 is a cross-sectional view of B-B in FIG.
  • the laser particle size analyzer with a liquid sheath flow measuring cell includes a measuring cell, which includes a medium flow introduction cavity 100, a measuring glass cavity 200, a particle flow introduction cavity 300 and a medium flow introduction auxiliary cavity 400;
  • the inlet 110 of the medium flow introduction cavity 100 is contained in the medium flow introduction auxiliary cavity 400.
  • the inlet 110 of the medium flow introduction cavity 100 is contained in the cavity above the middle of the medium flow introduction auxiliary cavity 400.
  • the outlet 120 of the flow introduction chamber 100 is connected to the inlet 210 of the measuring glass chamber 200; the side of the medium flow introduction auxiliary chamber 400 is provided with a medium introduction opening 410.
  • the medium introduction opening 410 is located below the entrance 110 of the medium flow introduction chamber 100.
  • the flow 70 enters the medium flow introduction auxiliary cavity 400 from the above-mentioned medium introduction opening 410; the particle flow introduction cavity 300 penetrates the medium flow introduction cavity 100, and the inlet 310 of the particle flow introduction cavity 300 extends out of the top of the medium flow introduction auxiliary cavity 400, The outlet 320 of the particle flow introduction cavity 300 extends into the measuring glass cavity 200, and the particle flow 60 flows from the particle flow introduction cavity 300 into the measuring glass cavity 200.
  • the medium flow 70 enters the medium flow introduction auxiliary cavity 400 from the medium introduction opening 410, and then flows upward along the outer wall of the medium flow introduction cavity 100 until it reaches the medium flow introduction The top of the outer wall of the cavity 100 is even higher.
  • the medium flow 70 flows downward from the inlet 110 of the medium flow introduction cavity 100 into the medium flow introduction cavity 100, and then flows into the measuring glass cavity 200; while the particle flow 60 flows from the particle
  • the flow introduction cavity 300 flows into the measuring glass cavity 200. Since the particle flow introduction cavity 300 penetrates the medium flow introduction cavity 100, while the particle flow 60 passes through the measuring glass cavity 200, the medium flow 70 also flows into the measuring glass cavity 200.
  • the speed of the medium flow 70 is greater than the speed of the particle flow 60, and the medium flow 70 can form a sheath flow that surrounds the particle flow 60 and has a uniform flow rate, which can ensure that the particle flow 60 does not touch the inside of the measuring glass chamber 200 during flow measurement.
  • the wall surface is kept clean without disassembly and cleaning. That is to say, when the particle stream 60 passes through the measuring glass chamber 200, both sides (around) are always covered by the clean medium stream 70, just like a knife being sheathed It is wrapped in the same way to achieve the effect of protecting the measuring glass cavity 200 from contamination.
  • the laser particle size analyzer with a liquid sheath flow measuring cell provided by the present invention solves the technical problems of inconvenience in operation due to the need to disassemble and clean the test glass of the measuring cell in the prior art and the optical system imbalance after resetting, and avoid the measuring cell in the measurement process It is contaminated to achieve the technical effect of long service life of the measuring cell, simple operation and good use effect.
  • the measuring glass chamber 200 of this embodiment is configured as a round tubular glass tube, that is, a round glass tube, which has a simple structure and stable performance, especially having a good effect on submicron particle measurement.
  • the medium flow introduction cavity 100 is set as a circular tubular medium flow introduction cavity
  • the particle flow introduction cavity 300 is set as a circular tubular particle flow introduction cavity
  • the medium flow introduction auxiliary cavity 400 is set as a circular tubular medium flow introduction tube

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Optical Measuring Cells (AREA)

Abstract

一种带液体鞘流测量池的激光粒度分析仪，包括测量池，该测量池包括颗粒流导入腔（3000）、介质流导入腔（1000）和测量玻璃腔（2000），其中，介质流导入腔（1000）连接在测量玻璃腔（2000）的上部；介质流导入腔（1000）环设在颗粒流导入腔（3000）的外周，且介质流导入腔（1000）与颗粒流导入腔（3000）之间形成间隙（607），介质流（70）从间隙（607）流入测量玻璃腔（2000），颗粒流（60）从颗粒流导入腔（3000）流入测量玻璃腔（2000）。该带液体鞘流测量池的激光粒度分析仪，解决了现有技术中测量池的测试玻璃需拆卸清理导致操作不便，以及复位后光学系统失调的技术问题，避免测量过程中测量池被污染，达到了测量池使用寿命高，操作简便，使用效果好的技术效果。

Description

一种带液体鞘流测量池的激光粒度分析仪 技术领域
本发明涉及颗粒测试仪器的技术领域，特别是涉及一种带液体鞘流测量池的激光粒度分析仪。
背景技术
激光粒度分析仪是利用颗粒对光的散射(衍射)现象测量颗粒大小及其分布，测量时，被测颗粒要分散在液体或气体介质中。具体参见图1，该图是经典的颗粒悬浮在液体中测量的原理图，用于分散被测颗粒的装置称为“测量池”，它由两边设置的玻璃1和玻璃2以及分别支撑这两片玻璃的框架3和框架4组成；被测颗粒样品是由成千上万个单体颗粒组成的颗粒群，为了使测量结果有较好的代表性，往往让颗粒与液体介质以适当的浓度混合在一起，流动通过上述测量池。具体测量原理如下：如图1中箭头方向5表示颗粒的流动方向或颗粒流，平行激光束6穿过玻璃1照射到测量池内的颗粒流，其中，激光束若是遇到颗粒，就会发生散射，散射光穿过玻璃2被傅里叶透镜7聚焦，探测器阵列8位于傅里叶透镜7的焦平面上，因此相同方向的散射光被聚焦到探测器阵列8的同一位置上，探测器阵列8由数十个探测单元组成，每个单元代表一个散射角的区间，探测单元将投射到上面的光信号转化成电信号，因此探测器阵列8输出的电信号的排列就代表散射光的角度分布，后续的计算机可根据散射光的分布信息反演计算出被测颗粒的粒度分布；而未被颗粒散射的激光束则被傅里叶透镜7聚焦到探测器阵列8中心的小孔上，激光束透过小孔被中心探测器9接收，用于检测颗粒在测量池中的浓度。
因此可知，被测颗粒流过上述测量池的两片玻璃1和玻璃2之间时，会有些较细或较粘的颗粒会粘到玻璃1和玻璃2的内壁面上，而随着测量次数的增加，玻璃1和玻璃2的内壁面会粘得越来越多的颗粒，以至于影响到了正常的测量，因此，目前湿法测量池必须设计成可拆洗的结构，在多次测试之后要常清理玻璃1和玻璃2的内壁面，操作很麻烦也比较耗费时间；此外，在玻璃1和玻璃2经拆卸清理之后再安装复位，会造成整个光学系统失调，因此又需重新调整光学系统才能进行再次测量，极其不便于使用，更是降低测量池的寿命。
发明内容
针对现有技术存在的问题，本发明提供一种带液体鞘流测量池的激光粒度分析仪，解决了现有技术中测量池的测试玻璃需拆卸清理导致操作不便，以及复位后光学系统失调的技术问题，避免测量过程中测量池被污染，达到了测量池使用寿命高，操作简便，使用效果好的技术效果。
为了实现上述目的，本发明提供如下技术方案：
一种带液体鞘流测量池的激光粒度分析仪，包括测量池，所述测量池包括颗粒流导入腔、介质流导入腔和测量玻璃腔，其中，所述介质流导入腔连接在所述测量玻璃腔的上部；所述介质流导入腔环设在所述颗粒流导入腔的外周，且所述介质流导入腔与所述颗粒流导入腔之间形成间隙，介质流从所述间隙流入所述测量玻璃腔，颗粒流从所述颗粒流导入腔流入所述测量玻璃腔。
进一步，所述颗粒流导入腔的出口相对于所述颗粒流导入腔向下倾斜缩小。
进一步，所述测量池还包括排出管，所述测量玻璃腔的出口连通所述排出管。
进一步，所述测量池还包括介质流导入辅腔，其中，所述介质流导入腔的入口容纳在所述介质流导入辅腔内，所述介质流导入腔的出口连通所述测量玻璃腔的入口；所述介质流导入辅腔的侧部开设有介质导入开口，所述介质导入开口位于所述介质流导入腔的入口的下方位置，介质流从所述介质导入开口进入所述介质流导入辅腔；所述颗粒流导入腔的入口伸出所述介质流导入辅腔的顶部，所述颗粒流导入腔的出口伸入所述测量玻璃腔内。
进一步，所述介质流导入腔的管入口容纳在所述介质流导入辅腔的中部以上的腔内。
进一步，所述介质流导入腔和所述介质流导入辅腔一体成型。
进一步，所述测量玻璃腔设置为圆管状玻璃管。
进一步，所述介质流导入腔设置为圆管状介质流导入腔，所述颗粒流导入腔设置为圆管状颗粒流导入腔，所述介质流导入辅腔设置为圆管状介质流导入管。
进一步，所述测量玻璃腔包括相对设置的两片平板玻璃以及固定所述两片平板玻璃的固定架。
进一步，所述介质流导入腔设置为长圆管状介质流导入腔，所述颗粒流导入腔设置为长圆管状颗粒流导入腔，所述介质流导入辅腔设置为长圆管状介质流导入管。
本发明的有益效果：
本发明提供的带液体鞘流测量池的激光粒度分析仪，包括测量池，测量池包括包括颗粒流导入腔、介质流导入腔和测量玻璃腔，其中，介质流导入腔连接在测量玻璃腔的上部； 介质流导入腔环设在颗粒流导入腔的外周，且介质流导入腔与颗粒流导入腔之间形成间隙，介质流从间隙流入测量玻璃腔，颗粒流从颗粒流导入腔流入测量玻璃腔。对于上述带液体鞘流测量池的激光粒度分析仪，颗粒流从颗粒流导入腔流入到测量玻璃腔中，由于颗粒流导入腔穿入介质流导入腔，因此在颗粒流通过测量玻璃腔的过程中，介质流从间隙流入测量玻璃腔，介质流形成环绕颗粒流且流速均匀的鞘流，可保证颗粒流在流动测量过程中不会碰到测量玻璃腔的内壁面，从而使之保持清洁无需拆卸清理，也就是说颗粒流在通过测量玻璃腔的过程中，两侧(四周)始终被洁净的介质流包裹着，就像一把刀被刀鞘包裹着一样，以达到保护测量玻璃腔不被污染的效果。本发明提供一种带液体鞘流测量池的激光粒度分析仪，解决了现有技术中测量池的测试玻璃需拆卸清理导致操作不便，以及复位后光学系统失调的技术问题，避免测量过程中测量池被污染，达到了测量池使用寿命高，操作简便，使用效果好的技术效果。
附图说明
图1为现有技术的颗粒悬浮在液体中测量的原理图；
图2为本发明实施例一带液体鞘流测量池的激光粒度分析仪的示意图；
图3为本发明实施例二带液体鞘流测量池的激光粒度分析仪的示意图；
图4为图3的A-A剖视图；
图5为图3的B-B剖视图；
图6为本发明实施例三带液体鞘流测量池的激光粒度分析仪的示意图；
图7为图6的A-A剖视图；
图8为图6的B-B剖视图。
图中，1—玻璃、2—玻璃、3—框架、4—框架、5—箭头方向、6—平行激光束、7—傅里叶透镜、8—探测器阵列、9—中心探测器、10/100/1000—介质流导入腔、11/110—入口、12/120—出口、20/200/2000—测量玻璃腔、21/210—入口、22/220—出口、23—平板玻璃、24—平板玻璃、30/300/3000—颗粒流导入腔、31/310—入口、32/320—出口、40/400—介质流导入辅腔、41/410—介质导入开口、50/500—排出管、60—颗粒流、70—介质流、607—间隙
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地 描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例一：
参见图2，图2为本发明实施例一带液体鞘流测量池的激光粒度分析仪的示意图。
本发明提供的带液体鞘流测量池的激光粒度分析仪，包括测量池，测量池包括包括颗粒流导入腔3000、介质流导入腔1000和测量玻璃腔2000，其中，介质流导入腔1000连接在测量玻璃腔2000的上部；介质流导入腔1000环设在颗粒流导入腔3000的外周，且介质流导入腔1000与颗粒流导入腔3000之间形成间隙，介质流70从间隙流入测量玻璃腔2000，颗粒流60从颗粒流导入腔3000流入测量玻璃腔2000。
对于上述带液体鞘流测量池的激光粒度分析仪，颗粒流60从颗粒流导入腔3000流入到测量玻璃腔2000中，由于颗粒流导入腔3000穿入介质流导入腔1000，因此在颗粒流60通过测量玻璃腔2000的同时，介质流70从间隙607流入测量玻璃腔2000，介质流70的速度大于颗粒流60的速度，介质流70即可形成环绕颗粒流60且流速均匀的鞘流，可保证颗粒流60在流动测量过程中不会碰到测量玻璃腔2000的内壁面，从而使之保持清洁无需拆卸清理，也就是说颗粒流60在通过测量玻璃腔2000的过程中，两侧(四周)始终被洁净的介质流70包裹着，就像一把刀被刀鞘包裹着一样，以达到保护测量玻璃腔2000不被污染的效果。
为了使颗粒流60更好地被介质流70环绕包围，本实施例的颗粒流导入腔3000的出口相对于颗粒流导入腔3000向下倾斜缩小，进一步保证颗粒流60在流动测量过程中不会碰到测量玻璃腔2000的内壁面。
另外，在测量完毕后，上述颗粒流60和介质流70形成了混合流，为了便于该混合流排出，本实施例的测量池还包括排出管，且测量玻璃腔2000的出口连通该排出管，排出管的结构形式不作具体限制，例如可以是漏斗式管或圆管，优选地可以是软管，便于排出方向的调改。
实施例二：
参见图3-图5，图3为本发明实施例二带液体鞘流测量池的激光粒度分析仪的示意图，图4为图3的A-A剖视图，图5为图3的B-B剖视图。
本实施例提供一种带液体鞘流测量池的激光粒度分析仪，具体参见图3，该带液体鞘 流测量池的激光粒度分析仪包括测量池，测量池包括介质流导入腔10、测量玻璃腔20、颗粒流导入腔30和介质流导入辅腔40；如图3中所示，介质流导入腔10的入口11容纳在介质流导入辅腔40内，优选地，介质流导入腔10的入口11容纳在介质流导入辅腔40的中部以上的腔内，介质流导入腔10的出口12连通测量玻璃腔20的入口21；介质流导入辅腔40的侧部开设有介质导入开口41，介质导入开口41位于介质流导入腔10的入口11的下方位置，介质流70从上述介质导入开口41进入介质流导入辅腔40中；颗粒流导入腔30穿入介质流导入腔10，且颗粒流导入腔30的入口31伸出介质流导入辅腔40的顶部，颗粒流导入腔30的出口32伸入测量玻璃腔20内，颗粒流60从颗粒流导入腔30流入测量玻璃腔20中。
对于上述带液体鞘流测量池的激光粒度分析仪，介质流70从介质导入开口41进入介质流导入辅腔40中，之后沿着介质流导入腔10的外壁向上流动，直到流到介质流导入腔10的外壁的顶端甚至更高位置，此时介质流70从介质流导入腔10的入口11向下流入介质流导入腔10内，再流入到测量玻璃腔20中；而颗粒流60从颗粒流导入腔30流入到测量玻璃腔20中，由于颗粒流导入腔30穿入介质流导入腔10，因此在颗粒流60通过测量玻璃腔20的同时，介质流70也流入到测量玻璃腔20，介质流70的速度大于颗粒流60的速度，介质流70即可形成环绕颗粒流60且流速均匀的鞘流，即可保证颗粒流60在流动测量过程中不会碰到测量玻璃腔20的内壁面，从而使之保持清洁无需拆卸清理，也就是说颗粒流60在通过测量玻璃腔20的过程中，两侧(四周)始终被洁净的介质流70包裹着。本发明提供的带液体鞘流测量池的激光粒度分析仪，解决了现有技术中测量池的测试玻璃需拆卸清理导致操作不便，以及复位后光学系统失调的技术问题，避免测量过程中测量池被污染，达到了测量池使用寿命高，操作简便，使用效果好的技术效果。
为了使颗粒流60更好地被介质流70环绕包围，本实施例的颗粒流导入腔30的出口32相对于颗粒流导入腔30向下倾斜缩小，进一步保证颗粒流60在流动测量过程中不会碰到测量玻璃腔20的内壁面。
此外，本实施例中，优选地，测量玻璃腔20的内径和介质流导入腔10的内径相等，以使得介质流70顺利从介质流导入腔10中流入到测量玻璃腔20中，并便于介质流70形成环绕颗粒流60且流速均匀的鞘流，进一步保证颗粒流60在流动测量过程中不会碰到测量玻璃腔20的内壁面，从而使之保持清洁无需拆卸清理。
进一步优选地，本实施例中的介质流导入辅腔40和介质流导入腔10一体成型，简化 加工工艺。
具体参见图5，本实施例的测量玻璃腔20包括相对设置的两片平板玻璃，分别是平板玻璃23和平板玻璃24，测量玻璃腔20还包括固定平板玻璃23和平板玻璃24的固定架，保证测量的精度。
具体参见图4，对应地，介质流导入腔10设置为长圆管状介质流导入腔，颗粒流导入腔30设置为长圆管状颗粒流导入腔，介质流导入辅腔40设置为长圆管状介质流导入管，便于介质流70形成环绕颗粒流60且流速均匀的鞘流，进一步保证颗粒流60在流动测量过程中不会碰到测量玻璃腔20的内壁面。
另外，在测量完毕后，上述颗粒流60和介质流70形成了混合流，为了便于该混合流排出，本实施例的测量池还包括排出管50，且测量玻璃腔20的出口22连通该排出管50，排出管50的结构形式不作具体限制，例如可以是漏斗式管或圆管，优选地可以是软管，便于排出方向的调改。
实施例三：
参见图6-图8，图6为本发明实施例三带液体鞘流测量池的激光粒度分析仪的示意图，图7为图6的A-A剖视图，图8为图6的B-B剖视图。
具体参见图6，该带液体鞘流测量池的激光粒度分析仪包括测量池，测量池包括介质流导入腔100、测量玻璃腔200、颗粒流导入腔300和介质流导入辅腔400；如图6中所示，介质流导入腔100的入口110容纳在介质流导入辅腔400内，优选地，介质流导入腔100的入口110容纳在介质流导入辅腔400的中部以上的腔内，介质流导入腔100的出口120连通测量玻璃腔200的入口210；介质流导入辅腔400的侧部开设有介质导入开口410，介质导入开口410位于介质流导入腔100的入口110的下方位置，介质流70从上述介质导入开口410进入介质流导入辅腔400中；颗粒流导入腔300穿入介质流导入腔100，且颗粒流导入腔300的入口310伸出介质流导入辅腔400的顶部，颗粒流导入腔300的出口320伸入测量玻璃腔200内，颗粒流60从颗粒流导入腔300流入测量玻璃腔200中。
对于上述带液体鞘流测量池的激光粒度分析仪，介质流70从介质导入开口410进入介质流导入辅腔400中，之后沿着介质流导入腔100的外壁向上流动，直到流到介质流导入腔100的外壁的顶端甚至更高位置，此时介质流70从介质流导入腔100的入口110向下流入介质流导入腔100内，再流入到测量玻璃腔200中；而颗粒流60从颗粒流导入腔300流入到测量玻璃腔200中，由于颗粒流导入腔300穿入介质流导入腔100，因此在颗粒流60通过测量玻璃腔200的同时，介质流70也流入到测量玻璃腔200，介质流70的速度大于颗粒流60的速 度，介质流70即可形成环绕颗粒流60且流速均匀的鞘流，即可保证颗粒流60在流动测量过程中不会碰到测量玻璃腔200的内壁面，从而使之保持清洁无需拆卸清理，也就是说颗粒流60在通过测量玻璃腔200的过程中，两侧(四周)始终被洁净的介质流70包裹着，就像一把刀被刀鞘包裹着一样，以达到保护测量玻璃腔200不被污染的效果。本发明提供的带液体鞘流测量池的激光粒度分析仪，解决了现有技术中测量池的测试玻璃需拆卸清理导致操作不便，以及复位后光学系统失调的技术问题，避免测量过程中测量池被污染，达到了测量池使用寿命高，操作简便，使用效果好的技术效果。
本实施例与上述实施例的区别在于：
具体参见图8，本实施例的测量玻璃腔200设置为圆管状玻璃管，也就是圆玻璃管，结构简洁、性能稳定、尤其在亚微米颗粒测量上具有良好的效果。
具体参见图7，对应地，介质流导入腔100设置为圆管状介质流导入腔，颗粒流导入腔300设置为圆管状颗粒流导入腔，介质流导入辅腔400设置为圆管状介质流导入管，便于介质流70形成环绕颗粒流60且流速均匀的鞘流，进一步保证颗粒流60在流动测量过程中不会碰到测量玻璃腔20的内壁面。
其他与上述实施例相同原理的内容不再赘述。
以上实施例仅用以说明本发明的技术方案而非限制，参照较佳实施例对本发明进行了详细说明，本领域技术人员应当理解，对本发明的技术方案进行修改或者等同替换，而不脱离本技术方案的宗旨和范围的方案，均应涵盖在本发明的权利要求范围内。

Claims (10)

  1. 一种带液体鞘流测量池的激光粒度分析仪，包括测量池，其特征在于：
    所述测量池包括颗粒流导入腔、介质流导入腔和测量玻璃腔，其中，
    所述介质流导入腔连接在所述测量玻璃腔的上部；
    所述介质流导入腔环设在所述颗粒流导入腔的外周，且所述介质流导入腔与所述颗粒流导入腔之间形成间隙，介质流从所述间隙流入所述测量玻璃腔，颗粒流从所述颗粒流导入腔流入所述测量玻璃腔。
  2. 根据权利要求1所述的带液体鞘流测量池的激光粒度分析仪，其特征在于：所述颗粒流导入腔的出口相对于所述颗粒流导入腔向下倾斜缩小。
  3. 根据权利要求1所述的带液体鞘流测量池的激光粒度分析仪，其特征在于：所述测量池还包括排出管，所述测量玻璃腔的出口连通所述排出管。
  4. 根据权利要求1所述的带液体鞘流测量池的激光粒度分析仪，其特征在于：所述测量池还包括介质流导入辅腔，其中，所述介质流导入腔的入口容纳在所述介质流导入辅腔内，所述介质流导入腔的出口连通所述测量玻璃腔的入口；所述介质流导入辅腔的侧部开设有介质导入开口，所述介质导入开口位于所述介质流导入腔的入口的下方位置，介质流从所述介质导入开口进入所述介质流导入辅腔；所述颗粒流导入腔的入口伸出所述介质流导入辅腔的顶部，所述颗粒流导入腔的出口伸入所述测量玻璃腔内。
  5. 根据权利要求4所述的带液体鞘流测量池的激光粒度分析仪，其特征在于：所述介质流导入腔的入口容纳在所述介质流导入辅腔的中部以上的腔内。
  6. 根据权利要求4所述的带液体鞘流测量池的激光粒度分析仪，其特征在于：所述介质流导入腔与所述介质流导入辅腔一体成型。
  7. 根据权利要求1-6任一所述的带液体鞘流测量池的激光粒度分析仪，其特征在于：所述测量玻璃腔设置为圆管状玻璃管。
  8. 根据权利要求7所述的带液体鞘流测量池的激光粒度分析仪，其特征在于：所述介质流导入腔设置为圆管状介质流导入腔，所述颗粒流导入腔设置为圆管状颗粒流导入腔，所述介质流导入辅腔设置为圆管状介质流导入管。
  9. 根据权利要求1-6任一所述的带液体鞘流测量池的激光粒度分析仪，其特征在于：所 述测量玻璃腔包括相对设置的两片平板玻璃以及固定所述两片平板玻璃的固定架。
  10. 根据权利要求9所述的带液体鞘流测量池的激光粒度分析仪，其特征在于：所述介质流导入腔设置为长圆管状介质流导入腔，所述颗粒流导入腔设置为长圆管状颗粒流导入腔，所述介质流导入辅腔设置为长圆管状介质流导入管。
PCT/CN2020/096496 2019-07-31 2020-06-17 一种带液体鞘流测量池的激光粒度分析仪 WO2021017673A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/578,553 US20220136955A1 (en) 2019-07-31 2022-01-19 Laser particle size analyzer with liquid sheath flow measuring cell

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910698536.8 2019-07-31
CN201910698536.8A CN110308075A (zh) 2019-07-31 2019-07-31 一种带液体鞘流测量池的激光粒度分析仪

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/578,553 Continuation US20220136955A1 (en) 2019-07-31 2022-01-19 Laser particle size analyzer with liquid sheath flow measuring cell

Publications (1)

Publication Number Publication Date
WO2021017673A1 true WO2021017673A1 (zh) 2021-02-04

Family

ID=68082485

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/096496 WO2021017673A1 (zh) 2019-07-31 2020-06-17 一种带液体鞘流测量池的激光粒度分析仪

Country Status (3)

Country Link
US (1) US20220136955A1 (zh)
CN (1) CN110308075A (zh)
WO (1) WO2021017673A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110308075A (zh) * 2019-07-31 2019-10-08 珠海真理光学仪器有限公司 一种带液体鞘流测量池的激光粒度分析仪
CN110687022B (zh) * 2019-11-05 2021-09-24 珠海真理光学仪器有限公司 一种利用散射光的偏振差异测量颗粒折射率的方法及系统

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050174572A1 (en) * 2004-02-05 2005-08-11 Advanced Analytical Technologies, Inc. Rapid bacteria detector
CN101025414A (zh) * 2006-02-21 2007-08-29 郑州市精科分析仪器有限公司 一种激光血球计数仪
US7799575B2 (en) * 2006-11-07 2010-09-21 Genetix Limited Flow cytometers
CN104034648A (zh) * 2013-03-05 2014-09-10 天津炜辐医疗科技有限公司 用于衍射成像流式细胞仪的流体动力学聚焦装置
CN204903353U (zh) * 2015-09-12 2015-12-23 武汉科技大学 一种新型的流式细胞仪流动室
CN206235543U (zh) * 2016-08-24 2017-06-09 桂林优利特医疗电子有限公司 粒子分析仪
CN110308075A (zh) * 2019-07-31 2019-10-08 珠海真理光学仪器有限公司 一种带液体鞘流测量池的激光粒度分析仪
CN210571845U (zh) * 2019-07-31 2020-05-19 珠海真理光学仪器有限公司 一种带液体鞘流测量池的激光粒度分析仪

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05273203A (ja) * 1992-03-24 1993-10-22 Fuji Electric Co Ltd 細胞または微粒子解析装置
JP3891925B2 (ja) * 2002-12-03 2007-03-14 ベイバイオサイエンス株式会社 生物学的粒子の情報を得る装置
EP2864049A4 (en) * 2012-06-22 2016-01-20 Bio Rad Laboratories CONDENSED GEOMETRY NOZZLE FOR FLOW CYTOMETRY
WO2014003689A1 (en) * 2012-06-28 2014-01-03 Nanyang Technological University Detection device and method for detection of particles
CN103487359B (zh) * 2013-09-25 2016-03-30 江西科技师范大学 一种激光激发的细胞和颗粒形态和分布测量装置
CN205091222U (zh) * 2015-10-13 2016-03-16 丹东百特仪器有限公司 一种具有鞘流技术的动态颗粒图像粒度粒形分析仪
CN113504164B (zh) * 2021-06-09 2023-05-30 青岛众瑞智能仪器股份有限公司 一种鞘流器及气溶胶光度计

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050174572A1 (en) * 2004-02-05 2005-08-11 Advanced Analytical Technologies, Inc. Rapid bacteria detector
CN101025414A (zh) * 2006-02-21 2007-08-29 郑州市精科分析仪器有限公司 一种激光血球计数仪
US7799575B2 (en) * 2006-11-07 2010-09-21 Genetix Limited Flow cytometers
CN104034648A (zh) * 2013-03-05 2014-09-10 天津炜辐医疗科技有限公司 用于衍射成像流式细胞仪的流体动力学聚焦装置
CN204903353U (zh) * 2015-09-12 2015-12-23 武汉科技大学 一种新型的流式细胞仪流动室
CN206235543U (zh) * 2016-08-24 2017-06-09 桂林优利特医疗电子有限公司 粒子分析仪
CN110308075A (zh) * 2019-07-31 2019-10-08 珠海真理光学仪器有限公司 一种带液体鞘流测量池的激光粒度分析仪
CN210571845U (zh) * 2019-07-31 2020-05-19 珠海真理光学仪器有限公司 一种带液体鞘流测量池的激光粒度分析仪

Also Published As

Publication number Publication date
CN110308075A (zh) 2019-10-08
US20220136955A1 (en) 2022-05-05

Similar Documents

Publication Publication Date Title
WO2021017673A1 (zh) 一种带液体鞘流测量池的激光粒度分析仪
US4113386A (en) Photometer
CA1041318A (en) Electro-optical method and system for in situ measurements of particulate mass density
US6431014B1 (en) High accuracy aerosol impactor and monitor
US4876458A (en) Apparatus for measuring particles in liquid
US20130100433A1 (en) Aperture System for Multi-Angle Light Scattering Detectors
CN105486619A (zh) 颗粒物测量仪标定系统及其标定方法
RU2385461C2 (ru) Оптический времяпролетный велосиметр
RU2538364C2 (ru) Усовершенствованная искровая камера для оптико-эмиссионного анализа
US3787122A (en) Light scattering particle analyzer
CN210571845U (zh) 一种带液体鞘流测量池的激光粒度分析仪
US7869037B2 (en) Particle size distribution measuring device
US5030843A (en) Apparatus for measuring particles in liquid having a laminar flow condition
US7719686B2 (en) System for measuring a color property of a liquid
US3535531A (en) High-volume airborne-particle light scattering detector system having rectangularly shaped elongated scanning zone
BRPI0708806A2 (pt) sistema de mediÇço de funÇço dupla
US3609048A (en) Self cleaning sample cell for radiant energy analyzers
US7684045B2 (en) Probe apparatus for measuring a color property of a liquid
CN103284324B (zh) 非接触旋转式圆柱形制品直径测量装置的除、防尘装置
KR102479361B1 (ko) 광학 챔버용 커튼 유동 설계
US7477394B2 (en) Method for measuring a color property of a liquid using a liquid measurement cell having a transparent partition therein
US11609179B2 (en) Apparatus and method for monitoring particle flow in a stack
JPH02168138A (ja) 微粒子測定装置
WO2017221495A1 (ja) 液膜生成ノズル
WO2023044643A1 (zh) 下落式气溶胶浓度传感器标定测试装置及方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20846650

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20846650

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 19.09.2022)

122 Ep: pct application non-entry in european phase

Ref document number: 20846650

Country of ref document: EP

Kind code of ref document: A1