Dynamic and static light scattering combined image laser two-in-one particle analyzer

Abstract

The invention discloses a dynamic and static light scattering combined image laser two-in-one particle analyzer, which comprises a working box, and is characterized in that a measuring box is fixedly connected in the working box, a camera shooting baffle block fixedly connected with the measuring box is fixedly connected in the working box, and a camera shooting baffle block is fixedly connected with the camera shooting baffle block. A backward detection array is fixedly connected to the top of the camera shooting stop block, and a high-definition camera is fixedly connected to the side, away from the camera shooting stop block, of the interior of the working box. According to the invention, the dynamic light scattering technology and the static light scattering technology are organically combined, the instrument can automatically select the most suitable light scattering mode for measurement according to the preliminary estimated size of the sample particles, the measurement range of the instrument is greatly widened, high-precision measurement of nano-scale to millimeter-scale particles can be realized, and the measurement accuracy is greatly improved except the light scattering technology. A high-resolution image acquisition system is also integrated, and the instrument can image particles in a sample while light scattering measurement is carried out.

Description

Technical Field

[0001] The invention relates to the technical field of particle size analyzers, and in particular to an image laser two-in-one particle size analyzer combining dynamic and static light scattering. Background Art

[0002] A particle size analyzer is an instrument that uses physical methods to test the size and distribution of solid particles. Particle size analyzers can be divided into nanoparticle size analyzers, laser particle size analyzers, single particle light obstruction particle size analyzers, and image particle size analyzers, and are widely used in the detection of various powdered materials.

[0003] In many industrial fields and scientific research, it is crucial to accurately measure the particle size distribution of particles. Traditional particle size analysis methods, such as screening and sedimentation methods, have problems such as limited measurement range, low accuracy, and cumbersome operation. Although the current laser particle size analyzer can quickly measure the particle size distribution of particles, its measurement results may be biased for some irregularly shaped and highly agglomerated particles, and the measurement process is often accompanied by uneven particle dispersion, which is more likely to lead to inaccurate measurement data.

[0004] Based on this, the present invention proposes a two-in-one image laser particle size analyzer that combines dynamic and static light scattering. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a two-in-one particle size analyzer combining dynamic and static light scattering with image laser.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A two-in-one image laser particle size analyzer combining dynamic and static light scattering includes a work box, characterized in that a measuring box is fixedly connected to the inside of the work box, a camera block fixedly connected to the measuring box is fixedly connected to the inside of the work box, a backward detection array is fixedly connected to the top of the camera block, a high-definition camera is fixedly connected to the side of the work box away from the camera block, a forward detection array is fixedly connected to the top of the high-definition camera, and a laser is fixedly connected between the measuring box and the forward detection array.

[0007] Preferably, a through hole is provided on the measuring box, lenses are fixedly connected on both sides of the through hole, an oscillation component is arranged inside the through hole for continuously shaking the particles of the mixed solution to be tested to ensure their uniform dispersion, the oscillation component includes a first sample pool fixedly connected inside the through hole, the top and bottom of the first sample pool are slidably connected to piston rods, and the adjacent sides of the two piston rods are fixedly connected to pistons slidably connected to the first sample pool.

[0008] Preferably, a transmission assembly for driving the oscillation assembly to oscillate back and forth is provided on the side of the interior of the working box near the through hole, and the transmission assembly includes a buffer chamber opened in the interior of the measuring box near the water inlet pipe, and a water flow sensor is fixedly provided on the inner wall of the buffer chamber, and a transmission compartment is opened on the side of the interior of the measuring box near the buffer chamber, and a motor fixedly connected to the water flow sensor is provided inside the transmission compartment, and reciprocating screws are rotatably connected at both ends of the motor, and screw nuts are threadedly sleeved on the two reciprocating screws, a fixing rod is fixedly connected to the top of the transmission compartment, and an air pumping rod is fixedly connected to the bottom of the transmission compartment, a sliding plate is slidably connected to the fixing rod, and another sliding plate is fixedly connected to the air pumping rod, and the two sliding plates are respectively fixedly connected to the two piston rods.

[0009] Preferably, a fixing box is fixedly connected to one side of the measuring box, and a cleaning component for regularly cleaning the surface of the lens is arranged inside the fixing box, and the cleaning component comprises an elastic air bag fixedly connected to the inside of the fixing box, a pressure relief valve is fixedly connected to one side of the elastic air bag, and an air injection groove is provided on the side of the pressure relief valve away from the elastic air bag, a fixing plate is fixedly connected to the inside of the fixing box, a guide rod fixedly connected to the fixing plate and fixedly connected to the fixing box, one side of the fixing plate is fixedly connected to two sliding rods, and the two sliding rods are slidably connected to a push plate away from the side of the fixing plate, and two springs are fixedly connected between the push plate and the fixing plate, a sliding groove is provided at the top of the fixing box, a first cleaning scraper fixedly connected to the push plate and slidably connected to the sliding groove, a guide groove is provided at the top of the measuring box, a synchronization rod slidably connected to the guide groove is fixedly connected to the first cleaning scraper, and a second cleaning scraper is fixedly connected to the side of the synchronization rod away from the first cleaning scraper.

[0010] Preferably, an ultrasonic disperser is fixedly connected to one side of the working box, a stirring controller is fixedly connected to the top of the ultrasonic disperser, and the ultrasonic disperser is connected to the first sample pool through a water inlet pipe.

[0011] Preferably, a second sample pool is fixedly arranged at the bottom of the measuring box, the first sample pool and the second sample pool are connected via a water pipe, and the second sample pool and the ultrasonic disperser are connected via a water outlet pipe.

[0012] Preferably, the air outlet end of the pumping rod is connected to the air inlet end of the elastic airbag.

[0013] The present invention has the following beneficial effects: 1. By organically combining dynamic light scattering and static light scattering techniques, the instrument can automatically select the most appropriate light scattering mode for measurement based on the preliminary estimated size of the sample particles, greatly broadening the measurement range of the instrument, and can achieve high-precision measurement of particles from nanometers to millimeters. In addition to light scattering technology, the present invention also integrates a high-resolution image acquisition system. While performing light scattering measurements, the instrument can image the particles in the sample. Through a specially designed sample pool, the particles are ensured to be in a uniformly dispersed and stable state during the measurement process, which is convenient for image acquisition. The acquired images can clearly present information such as the shape, outline, and aggregation state of the particles.

[0014] 2. By setting up a transmission component and an oscillation component, the output shaft drives the reciprocating screws at both ends to rotate at high speed. Since the screw nut is connected to the reciprocating screw by a thread, according to the principle of spiral transmission, the screw nut will make reciprocating linear motion along the axial direction of the reciprocating screw. This reciprocating motion of the screw nut is transmitted to the piston rod through the sliding plate fixedly connected to it, thereby pushing the piston to reciprocate in the first sample pool. The reciprocating motion of the piston is like a powerful agitator, which continuously shakes the mixed solution to be tested in the first sample pool, so that the particles therein are always in a dynamic dispersed state.

[0015] 3. By setting up a cleaning component, when the air pump works under the action of the transmission component, its air outlet end inflates the elastic airbag. When the airbag pressure reaches a certain value, the air is ejected through the pressure relief valve through the air injection slot to perform preliminary cleaning on the lens surface. At the same time, under the action of the spring and the slide bar, the push plate drives the first cleaning scraper to slide along the slide slot, and the second cleaning scraper moves synchronously through the synchronization rod to comprehensively scrape and clean the lens surface, effectively remove impurities attached to the lens surface, and avoid the light scattering effect affected by lens contamination, thereby extending the service life of the core components of the instrument and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of a two-in-one image laser particle size analyzer combining dynamic and static light scattering proposed by the present invention; Figure 2 It is a schematic diagram of the top view of the interior of the working box in the present invention; Figure 3 It is a schematic diagram of the side view structure inside the working box of the present invention; Figure 4 It is a structural schematic diagram of the measuring box in the present invention; Figure 5 It is a schematic diagram of the structure inside the buffer cavity of the present invention; Figure 6 It is a structural schematic diagram of the transmission assembly in the present invention; Figure 7It is a schematic diagram of the structure inside the transmission compartment of the present invention; Figure 8 It is a schematic diagram of the structure of the elastic airbag in the present invention; Fig. 9 It is a schematic diagram of the structure inside the fixed box of the present invention.

[0017] In the figure: 1 working box, 2 ultrasonic disperser, 3 stirring controller, 4 water inlet pipe, 5 water outlet pipe, 6 measuring box, 7 through hole, 8 first sample pool, 9 lens, 10 buffer chamber, 11 water flow sensor, 12 transmission bin, 13 motor, 14 reciprocating screw, 15 screw nut, 16 fixed rod, 17 air pumping rod, 18 sliding plate, 19 piston rod, 20 piston, 21 fixed box, 22 elastic air bag, 23 pressure relief valve, 24 jet slot, 25 fixed plate, 26 guide rod, 27 sliding rod, 28 push plate, 29 spring, 30 slide slot, 31 first cleaning scraper, 32 guide slot, 33 synchronization rod, 34 second cleaning scraper, 35 second sample pool, 36 water guide pipe, 37 camera block, 38 backward detection array, 39 high-definition camera, 40 forward detection array, 41 laser. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Embodiment 1

[0019] Reference Figure 1-Figure 7 , an image laser two-in-one particle size analyzer combining dynamic and static light scattering, comprising a working box 1, a measuring box 6 is fixedly connected to the working box 1, a camera block 37 fixedly connected to the measuring box 6 is fixedly connected to the working box 1, a rearward detection array 38 is fixedly connected to the top of the camera block 37, a high-definition camera 39 is fixedly connected to the side of the working box 1 away from the camera block 37, a forward detection array 40 is fixedly connected to the top of the high-definition camera 39, and a laser 41 is fixedly connected between the measuring box 6 and the forward detection array 40; An ultrasonic disperser 2 is fixedly connected to one side of the working box 1, a stirring controller 3 is fixedly connected to the top of the ultrasonic disperser 2, the ultrasonic disperser 2 is connected to the first sample pool 8 through a water inlet pipe 4, a second sample pool 35 is fixedly arranged at the bottom of the measuring box 6, the first sample pool 8 and the second sample pool 35 are connected through a water guide pipe 36, and the second sample pool 35 and the ultrasonic disperser 2 are connected through a water outlet pipe 5; A through hole 7 is provided on the measuring box 6, and lenses 9 are fixedly connected to both sides of the through hole 7. An oscillation component for continuously shaking the particles of the mixed solution to be measured to ensure their uniform dispersion is provided inside the through hole 7. The oscillation component includes a first sample pool 8 fixedly connected to the inside of the through hole 7, and the top and bottom of the first sample pool 8 are slidably connected to piston rods 19, and the adjacent sides of the two piston rods 19 are fixedly connected to pistons 20 slidably connected to the first sample pool 8; A transmission assembly for driving the oscillation assembly to reciprocate is provided on one side of the working box 1 near the through hole 7, and the transmission assembly includes a buffer chamber 10 opened in the measuring box 6 near the water inlet pipe 4, and a water flow sensor 11 is fixedly provided on the inner wall of the buffer chamber 10, and a transmission compartment 12 is opened on one side of the measuring box 6 near the buffer chamber 10, and a motor 13 fixedly connected to the water flow sensor 11 is fixedly connected to the transmission compartment 12, and reciprocating screws 14 are rotatably connected at both ends of the motor 13, and screw nuts 15 are threadedly sleeved on the two reciprocating screws 14, a fixing rod 16 is fixedly connected to the top of the transmission compartment 12, and an air pumping rod 17 is fixedly connected to the bottom of the transmission compartment 12, a sliding plate 18 is slidably connected to the fixing rod 16, and another sliding plate 18 is fixedly connected to the air pumping rod 17, and the two sliding plates 18 are respectively fixedly connected to two piston rods 19; In this embodiment, first, the particles to be tested and an appropriate amount of water are added to the ultrasonic disperser 2 in a certain proportion. The ultrasonic disperser 2 is turned on, which uses high-frequency ultrasonic energy to generate a strong cavitation effect and mechanical vibration in the liquid. Cavitation bubbles are rapidly formed, grown and ruptured, and the high pressure and strong shear force generated instantly act on the particle agglomerates, effectively breaking the agglomeration forces between the particles, so that the particles are initially evenly dispersed in the solution, preparing for subsequent measurements. This step corresponds to the key role of the ultrasonic disperser in the initial stage of particle dispersion in the beneficial effect, that is, using the cavitation effect and mechanical vibration to break the particle agglomeration and achieve initial uniform dispersion; Furthermore, the water flow sensor 11 on the inner wall of the buffer chamber 10 near the water inlet pipe 4 inside the measuring box 6 monitors the water flow in the water inlet pipe 4 in real time. When the water flow sensor 11 detects the water flow, it transmits the signal to the motor 13 fixedly connected to it. The motor 13 is started, and the output shafts at both ends drive the reciprocating screw 14 to rotate at high speed. Since the screw nut 15 is threadedly connected to the reciprocating screw 14, the screw nut 15 will reciprocate linearly along the axial direction of the reciprocating screw 14; At the same time, the sliding plate 18 slidably connected to the fixed rod 16 and the sliding plate 18 fixedly connected to the pumping rod 17 transmit the reciprocating motion of the lead screw nut 15 to the piston rod 19 fixedly connected thereto. The piston rod 19 pushes the piston 20 to reciprocate in the first sample pool 8, like a powerful agitator, continuously shaking the mixed solution to be tested in the first sample pool 8, ensuring that the particles are always in a dynamically uniformly dispersed state during the measurement process; This process demonstrates how the oscillating component, based on ultrasonic dispersion, further ensures the uniform dispersion of particles during measurement, provides a stable and uniform sample environment for dynamic and static light scattering measurements, and improves the accuracy and reliability of measurement results, which is closely related to the beneficial effects of efficient particle dispersion and measurement. Embodiment 2

[0020] Reference Figure 4-Figure 9 Compared with the first embodiment, in the present embodiment, a fixing box 21 is fixedly connected to one side of the measuring box 6, and a cleaning assembly for regularly cleaning the surface of the lens 9 is arranged inside the fixing box 21. The cleaning assembly includes an elastic airbag 22 fixedly connected to the inside of the fixing box 21, a pressure relief valve 23 is fixedly connected to one side of the elastic airbag 22, and an air jet groove 24 is provided on the side of the pressure relief valve 23 away from the elastic airbag 22. A fixing plate 25 is fixedly connected to the inside of the fixing box 21, and a guide rod 26 fixedly connected to the fixing box 21 is fixedly connected to the fixing plate 25. One side of the fixing plate 25 is fixedly connected to the fixing box 21. Two sliding rods 27 are fixedly connected to the side, and a push plate 28 is slidably connected to the side of the two sliding rods 27 away from the fixed plate 25. Two springs 29 are fixedly connected between the push plate 28 and the fixed plate 25. A slide groove 30 is provided on the top of the fixed box 21, and a first cleaning scraper 31 slidably connected to the slide groove 30 is fixedly connected to the push plate 28. A guide groove 32 is provided on the top of the measuring box 6, and a synchronization rod 33 slidably connected to the guide groove 32 is fixedly connected to the first cleaning scraper 31, and a second cleaning scraper 34 is fixedly connected to the side of the synchronization rod 33 away from the first cleaning scraper 31.

[0021] The air outlet end of the pumping rod 17 is communicated with the air inlet end of the elastic air bag 22 .

[0022] In this embodiment, when the transmission assembly is working, the pumping rod 17 reciprocates under the drive of the motor 13, and its outlet end periodically inflates the elastic airbag 22. As the gas is continuously inflated, the pressure inside the elastic airbag 22 gradually increases. When the pressure reaches the set threshold of the pressure relief valve 23, the pressure relief valve 23 opens, and the high-pressure gas in the airbag is ejected through the jet slot 24 in the form of high-speed airflow.

[0023] At this time, the high-speed airflow will push the push plate 28 to overcome the elastic force of the spring 29 and slide along the slide bar 27. The sliding of the push plate 28 drives the first cleaning scraper 31 fixed thereon to move linearly along the slide groove 30. The first cleaning scraper 31 is connected to the second cleaning scraper 34 through the synchronization rod 33, so as to achieve the synchronous movement of the two. During the movement, the two cleaning scrapers are closely attached to the surface of the lens 9, and the surface of the lens 9 is scraped and cleaned comprehensively and carefully, and the stubborn stains, particles and other impurities attached to the surface of the lens are completely removed, which effectively avoids the problem of reduced light scattering effect caused by lens contamination, greatly prolongs the service life of the core components of the instrument such as the lens 9, the laser 41, etc., reduces the time and economic cost caused by frequent replacement of optical components or deep cleaning and maintenance of the instrument, improves the use efficiency and stability of the instrument, and reduces the operating costs of enterprises and scientific research institutions.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A two-in-one image laser particle size analyzer combining dynamic and static light scattering, comprising a working box (1), characterized in that: The working box (1) is fixedly connected to a measuring box (6) inside, the working box (1) is fixedly connected to a camera block (37) fixedly connected to the measuring box (6), the top of the camera block (37) is fixedly connected to a backward detection array (38), a high-definition camera (39) is fixedly connected to a side of the working box (1) away from the camera block (37), the top of the high-definition camera (39) is fixedly connected to a forward detection array (40), and a laser (41) is fixedly connected between the measuring box (6) and the forward detection array (40).

2. The image laser two-in-one particle size analyzer combining dynamic and static light scattering according to claim 1, characterized in that: The measuring box (6) is provided with a through hole (7), and lenses (9) are fixedly connected to both sides of the through hole (7). An oscillating component for continuously shaking particles of the mixed solution to be measured to ensure uniform dispersion is provided inside the through hole (7), and the oscillating component comprises a first sample pool (8) fixedly connected to the inside of the through hole (7), and piston rods (19) are slidably connected to the top and bottom of the first sample pool (8), and pistons (20) slidably connected to the first sample pool (8) are fixedly connected to adjacent sides of the two piston rods (19).

3. The image laser two-in-one particle size analyzer combining dynamic and static light scattering according to claim 1, characterized in that: A transmission assembly for driving the oscillating assembly to reciprocate is arranged on a side of the working box (1) near the through hole (7), the transmission assembly comprising a buffer chamber (10) provided inside the measuring box (6) near the water inlet pipe (4), a water flow sensor (11) being fixedly arranged on the inner wall of the buffer chamber (10), a transmission chamber (12) being provided inside the measuring box (6) near the buffer chamber (10), a motor (13) being fixedly connected to the water flow sensor (11) being fixedly connected to the inside of the transmission chamber (12). ), both ends of the motor (13) are rotatably connected to a reciprocating screw (14), and screw nuts (15) are threadedly sleeved on the two reciprocating screws (14). The top of the transmission chamber (12) is fixedly connected to a fixing rod (16), and the bottom of the transmission chamber (12) is fixedly connected to an air pumping rod (17). A sliding plate (18) is slidably connected to the fixing rod (16), and another sliding plate (18) is fixedly connected to the air pumping rod (17). The two sliding plates (18) are respectively fixedly connected to two piston rods (19).

4. The image laser two-in-one particle size analyzer combining dynamic and static light scattering according to claim 1, characterized in that: A fixing box (21) is fixedly connected to one side of the measuring box (6); a cleaning assembly for regularly cleaning the surface of the lens (9) is arranged inside the fixing box (21); the cleaning assembly comprises an elastic airbag (22) fixedly connected to the inside of the fixing box (21); a pressure relief valve (23) is fixedly connected to one side of the elastic airbag (22); a jetting groove (24) is provided on a side of the pressure relief valve (23) away from the elastic airbag (22); a fixing plate (25) is fixedly connected to the inside of the fixing box (21); a guide rod (26) fixedly connected to the fixing plate (25) and connected to the fixing box (21); and two fixing plates (25) are fixedly connected to one side of the fixing plate (25). A slide bar (27), a push plate (28) is slidably connected to one side of the two slide bars (27) away from the fixed plate (25), two springs (29) are fixedly connected between the push plate (28) and the fixed plate (25), a slide groove (30) is provided on the top of the fixed box (21), a first cleaning scraper (31) is fixedly connected to the push plate (28) and is slidably connected to the slide groove (30), a guide groove (32) is provided on the top of the measuring box (6), a synchronization rod (33) is fixedly connected to the first cleaning scraper (31) and is slidably connected to the guide groove (32), and a second cleaning scraper (34) is fixedly connected to the side of the synchronization rod (33) away from the first cleaning scraper (31).

5. The image laser two-in-one particle size analyzer combining dynamic and static light scattering according to claim 1, characterized in that: An ultrasonic disperser (2) is fixedly connected to one side of the working box (1), a stirring controller (3) is fixedly connected to the top of the ultrasonic disperser (2), and the ultrasonic disperser (2) is connected to the first sample pool (8) via a water inlet pipe (4).

6. The image laser two-in-one particle size analyzer combining dynamic and static light scattering according to claim 1, characterized in that: A second sample pool (35) is fixedly arranged at the bottom of the measuring box (6); the first sample pool (8) and the second sample pool (35) are connected via a water conduit (36); and the second sample pool (35) and the ultrasonic disperser (2) are connected via a water outlet pipe (5).

7. The image laser two-in-one particle size analyzer combining dynamic and static light scattering according to claim 4, characterized in that: The air outlet end of the pumping rod (17) is in communication with the air inlet end of the elastic air bag (22).

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