A laser particle size analyzer for combined dynamic and static light scattering analysis

Abstract

This invention discloses a dynamic and static light scattering synergistic analysis laser particle size analyzer, relating to the field of laser particle size analyzer technology. It includes a bubble suppression component housed inside the main unit. The bubble suppression component comprises a progressive cone, a first honeycomb rectifier plate, a second honeycomb rectifier plate, and multiple turbine blades. The first and second honeycomb rectifier plates are respectively located at both ends of the progressive cone, used to disperse turbulent incoming water into multiple parallel fine streams, thereby reducing the number of bubbles and eliminating dead zones and eddies caused by bubbles. The water flow impact drives multiple turbine blades to rotate on one side of the second honeycomb rectifier plate, preventing a large number of bubbles from adhering to the edges of the holes in the second honeycomb rectifier plate. The fluid pressure is converted into mechanical rotation to eliminate the impact force of the water flow, allowing the water flow to be introduced into the sample cell in a parallel state for laser detection. This reduces the risk of the first inlet pipe being affected by vibration during laser particle size detection.

Description

Technical Field

[0001] This invention relates to the field of laser particle size analyzer technology, specifically to a laser particle size analyzer for combined dynamic and static light scattering analysis. Background Technology

[0002] Laser particle size analyzers primarily measure the scattered light signals from laser beams emitted by particles. Using a physical model, they calculate the particle size and distribution. First, a highly monochromatic parallel laser beam is emitted. When this beam illuminates a well-dispersed group of particles, each particle generates scattered light. The superposition of scattered light from numerous particles creates a specific energy distribution. After passing through a lens, light rays with the same scattering angle are focused onto the same point on the focal plane. A photodetector composed of multiple ring-shaped units is placed on the focal plane. The central detector measures the intensity of the unscattered direct light, while the outer ring detectors receive the energy of scattered light from different angles. Dynamic light scattering utilizes a fiber optic probe, a photon counter, and a digital correlator. Typically, a fixed angle is used to receive the scattered signal. The fiber optic probe is mounted on a robotic arm, which rotates around the sample cell via a rotating platform, receiving scattered light signals at different angles. In dynamic mode, the robotic arm stops at a specific angle to collect the fluctuation signal; in static mode, the robotic arm rotates continuously, and the multi-ring detector array collects the scattered light intensity at different angles. This method uses both the laser and the sample cell, but the dynamic and static measurements are performed in a time-division multiplexing manner.

[0003] A water pump drives water flow, delivering it to the sample cell via inlet and outlet pipes. This, in turn, circulates the particles within the sample cell. Upon pump startup, the inlet pipe experiences a slight vibration due to a sudden pressure change. This vibration carries water to the sample cell. However, this vibration can still cause the laser particle size analyzer to misinterpret it as particle movement, mistaking the vibration for the slow motion of large particles. This results in an overestimation of the particle size measured by dynamic light scattering. The turbulent flow causes deposits to form on the inner wall of the inlet pipe, increasing its roughness and reducing flow rate in localized areas. Under the influence of turbulent vortices, existing large air bubbles are torn into even more smaller bubbles, significantly increasing the number of bubbles. Since both particles and bubbles produce scattered light when the laser irradiates them, the detector cannot correctly distinguish between them. Furthermore, when bubbles pass through the inlet pipe joint, they can suddenly burst due to pressure changes, generating impacts that intensify pipe vibration, further increasing the vibration frequency and affecting measurement accuracy. Therefore, eliminating air bubbles is crucial. Summary of the Invention

[0004] The purpose of this invention is to provide a laser particle size analyzer for combined dynamic and static light scattering analysis, in order to solve the problem mentioned in the background art that the vibration of the water inlet pipe can cause the laser particle size analyzer to misjudge the movement of particles, taking the vibration as the slow movement of large particles. Under the action of turbulent vortex, the existing large bubbles will be torn into more small bubbles, and the bursting of bubbles will further increase the frequency of pipe vibration.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a laser particle size analyzer for combined dynamic and static light scattering analysis, comprising: The host and the sample cell are movably disposed inside the host and are used to drive the particle circulation to realize the laser particle size detection of the detector. A bubble suppression assembly is installed inside the main unit. The bubble suppression assembly includes a progressive cone, a first honeycomb rectifier plate, a second honeycomb rectifier plate, and multiple turbine blades. The first and second honeycomb rectifier plates are respectively located at both ends of the progressive cone to disperse the turbulent incoming water into multiple parallel fine streams, thereby reducing the number of bubbles. The progressive cone is used to smoothly fill the entire cavity with water flow, eliminating dead angles and eddies caused by bubbles. The water flow impact drives multiple turbine blades to rotate on one side of the second honeycomb rectifier plate to prevent a large number of bubbles from adhering to the edge of the holes in the second honeycomb rectifier plate. A bubble removal assembly is disposed inside a bubble suppression assembly. The bubble removal assembly includes multiple return springs and multiple peeling plates. The multiple return springs are used to drive the peeling plates to deflect, so that the bubbles attached to the surface of the peeling plates are deformed and stretched under shear force to break and eliminate them. A bubble purification assembly is disposed inside a bubble suppression assembly. The bubble purification assembly includes a micro switch, a centrifugal slider, and a push rod. The rotation of the second honeycomb rectifier plate drives the centrifugal slider to slide under the action of centrifugal force. The push rod contacts the micro switch to drive the ultrasonic transducer mounted on the second honeycomb rectifier plate to operate. The vibration of the second honeycomb rectifier plate is used to shake off the attached bubbles and particles.

[0006] Preferably, the bubble suppression assembly further includes a suppression cover plate, a suppression chamber, a plurality of first suppression holes, and a plurality of second suppression holes. The suppression chamber is disposed inside the sample cell, the suppression cover plate is disposed on one side of the sample cell, the plurality of first suppression holes are respectively opened on the surface of the first honeycomb rectifier plate, and the plurality of second suppression holes are respectively opened on the surface of the second honeycomb rectifier plate.

[0007] Preferably, the bubble suppression assembly further includes an auxiliary strip, a fan blade, and a pusher washer. The auxiliary strip is disposed at the center of the second honeycomb rectifier plate. The fan blade is sleeved on one end of the auxiliary strip. One side of each of the plurality of turbine blades is connected to the outer surface of the fan blade. The inner surface of the pusher washer is connected to the other side of each of the plurality of turbine blades, for driving the pusher washer to rotate circumferentially.

[0008] Preferably, the bubble-removing assembly further includes multiple arc-shaped plates, multiple L-shaped plates, and multiple decomposition holes. One side of each of the multiple arc-shaped plates is connected to one end of a multiple reset spring, and the other end of each of the multiple reset springs is connected to the outer surface of the fan blade.

[0009] Preferably, one side of each of the L-shaped plates is connected to the outer wall of the multiple arc-shaped plates, and the multiple decomposition holes are respectively opened on the surface of the multiple peeling plates to increase the area for water flow guidance.

[0010] Preferably, the purification bubble assembly further includes a trigger groove and a centrifugal slide groove. The trigger groove is formed on the surface of the second honeycomb rectifier plate, and the centrifugal slide groove is formed on the inner surface of the trigger groove. The centrifugal slider slides inside the centrifugal slide groove, and one end of the push rod is connected to one side of the centrifugal slider.

[0011] Preferably, an automatic circulating dispersion box is installed on one side of the main unit, the automatic circulating dispersion box is provided with a circulation pool inside, the circulation pool is provided with a water pump inside, and a first water inlet pipe is provided on one side of the circulation pool.

[0012] Preferably, a first outlet pipe is provided on one side of the circulation pool, a second inlet pipe is provided at one end of the first inlet pipe, one end of the second inlet pipe is interposed and connected to the progressive cone in the suppression chamber, a lens collecting plate is provided inside the sample pool, and the second inlet pipe extends from the other side of the progressive cone to one side of the sample pool.

[0013] Preferably, a second water outlet pipe is provided at one end of the first water outlet pipe, and one end of the second water outlet pipe is connected to one side of the sample pool.

[0014] Preferably, an indicator light is provided on one side of the automatic circulating dispersion box to allow the water flow to sweep vertically upward across the sample cell, causing the bubbles to be discharged upward.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, water is guided into the suppression chamber through the first inlet pipe. As the water flows from the large-diameter end on the right side of the progressive cone to the small-diameter end on the left, the cross-sectional area of ​​the flow channel gradually decreases. Therefore, the water velocity gradually increases while the pressure gradually decreases. This process results in a smoother flow, reducing the area of ​​vortex generation inside the progressive cone. After coarse rectification, the water enters the second suppression orifice, which has a smaller aperture, and is further refined into a more uniform parallel flow. The design of progressively smaller apertures avoids excessive resistance caused by sudden changes in aperture in a single-stage rectifier plate. Simultaneously, it captures and breaks up smaller microbubbles, and the auxiliary strip acts as a central guide. To prevent water from forming dead zones in the central area, the water flow is guided to the second honeycomb rectifier plate, impacting the impeller blades and converting the linear kinetic energy of the water flow into rotational kinetic energy. This drives the pusher washer to rotate, which in turn drives the auxiliary strip to rotate on one side of the second honeycomb rectifier plate. The rotating turbine blades disturb the water flow. This disturbance is not chaotic turbulence, but regular vortices. The vortices can further break up bubbles and convert the fluid pressure into mechanical rotation. This can eliminate the impact force of the water flow and guide the water flow into the sample cell in a parallel state for laser detection, reducing the risk that the vibration of the first water inlet pipe will affect the laser particle size detection.

[0016] In this invention, when the auxiliary strip of the entire bubble suppression assembly rotates, the previous water flow impacts the fan blades and turbine blades, driving the arc-shaped plate mounted on the rotating component. This plate is subjected to centrifugal force and is thrown outwards. Simultaneously, the water flow continuously impacts the arc-shaped plate. Under the combined action of centrifugal force and water flow impact, the arc-shaped plate overcomes the tension of the return spring and tilts outwards at a certain angle. This tilting motion is transmitted to the peeling plate through the L-shaped plate, causing the peeling plate to act like a small scraper, closely adhering to or sweeping across the surface of the second honeycomb-shaped rectifier plate. When the peeling plate sweeps across the rectifier plate surface, it generates a shearing force on the bubbles and particles attached to the plate surface and the edges of the second suppression holes, forcibly peeling the bubbles from the plate surface. The centrifugal slider mounted on the second honeycomb-shaped rectifier plate is subjected to... Under the action of centrifugal force, the slide is moved outward along the centrifugal chute, driving the push rod to move outward. At this time, the push rod is away from the micro switch, the micro switch is in the open state, and the ultrasonic wave does not work. When the second suppression hole of the second honeycomb rectifier is blocked by bubbles or particles, the flow cross-sectional area decreases, the flow velocity of the water flowing through the second honeycomb rectifier decreases, and the centrifugal force on the centrifugal slider is insufficient to overcome its own gravity and resistance. Under the action of gravity, it slides inward along the centrifugal chute, and the push rod gradually approaches the micro switch. After applying pressure to the micro switch, the power supply of the ultrasonic generator is turned on, and the ultrasonic transducer generates high-frequency vibration, which is transmitted to the surface of the bubble suppression assembly. The first honeycomb rectifier and the second honeycomb rectifier vibrate accordingly, and the bubbles and particles attached to their surfaces are shaken off. Attached Figure Description

[0017] Figure 1This is a three-dimensional structural schematic diagram of a laser particle size analyzer for combined dynamic and static light scattering analysis according to the present invention. Figure 2 This is a schematic diagram of a partial front view of a laser particle size analyzer for combined dynamic and static light scattering analysis according to the present invention. Figure 3 This is a partial side view of the structure of a laser particle size analyzer for combined dynamic and static light scattering analysis according to the present invention. Figure 4 This is a schematic diagram of the bubble suppression component in a laser particle size analyzer for combined dynamic and static light scattering analysis according to the present invention. Figure 5 This invention relates to a laser particle size analyzer for combined dynamic and static light scattering analysis. Figure 4 A magnified structural diagram at point A; Figure 6 This is a schematic diagram of the installation position structure of the auxiliary strip in a laser particle size analyzer for combined dynamic and static light scattering analysis according to the present invention; Figure 7 This is a schematic diagram of the bubble stripping component in a laser particle size analyzer for combined dynamic and static light scattering analysis according to the present invention. Figure 8 This is a schematic diagram of the installation position structure of the second honeycomb rectifier plate in a laser particle size analyzer for dynamic and static light scattering combined analysis according to the present invention. Figure 9 This invention relates to a laser particle size analyzer for combined dynamic and static light scattering analysis. Figure 8 A magnified structural diagram at point B; Figure 10 This is a schematic diagram of the installation position of the stripping disc in a laser particle size analyzer for combined dynamic and static light scattering analysis according to the present invention.

[0018] In the diagram: 100, Main unit; 101, Automatic circulating dispersion box; 102, Circulation tank; 103, Sample tank; 104, First inlet pipe; 105, First outlet pipe; 106, Indicator light; 107, Lens collecting plate; 108, Second inlet pipe; 109, Second outlet pipe; 2, Bubble suppression assembly; 201, Suppression cover plate; 202, Suppression chamber; 203, Progressive cone; 204, First honeycomb rectifier plate; 205, First suppression hole; 2 06. Second honeycomb rectifier plate; 207. Second suppression hole; 208. Auxiliary strip; 209. Fan blade; 210. Turbine blade; 211. Push washer; 3. Bubble stripping assembly; 301. Return spring; 302. Arc plate; 303. L-shaped plate; 304. Stripping piece; 305. Decomposition hole; 4. Bubble purification assembly; 401. Micro switch; 402. Centrifugal slider; 403. Push rod; 404. Trigger groove; 405. Centrifugal chute. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To address the problem that existing laser particle size analyzers using dynamic and static light scattering combined analysis suffer from misinterpretation of particle movement as particle motion during operation due to inlet pipe vibration, mistaking vibration for slow-moving large particles, and further exacerbating the issue by tearing large air bubbles into smaller ones under turbulent eddies, thus increasing the pipe vibration frequency, this invention provides a laser particle size analyzer for dynamic and static light scattering combined analysis. (Refer to...) Figure 1 and Figure 2 As shown: including: The host 100 and the sample cell 103 are movably disposed inside the host 100 and are used to drive the particle circulation to realize the laser particle size detection of the detector. The bubble suppression assembly 2 is disposed inside the main unit 100. The bubble suppression assembly 2 includes a progressive cone 203, a first honeycomb rectifier plate 204, a second honeycomb rectifier plate 206, and multiple turbine blades 210. The first honeycomb rectifier plate 204 and the second honeycomb rectifier plate 206 are respectively disposed at both ends of the progressive cone 203 to disperse the turbulent incoming water into multiple parallel fine streams to reduce the number of bubbles. The progressive cone 203 is used to smoothly fill the entire cavity with water flow, eliminating dead angles and eddies caused by bubbles. The water flow impact drives multiple turbine blades 210 to rotate on one side of the second honeycomb rectifier plate 206 to prevent a large number of bubbles from adhering to the edge of the holes of the second honeycomb rectifier plate 206. The bubble removal assembly 3 is disposed inside the bubble suppression assembly 2. The bubble removal assembly 3 includes multiple return springs 301 and multiple peeling plates 304. The multiple return springs 301 are used to drive the peeling plates 304 to deflect, so that the bubbles attached to the surface of the peeling plates 304 are deformed and stretched under the action of shear force to break and eliminate them. The bubble purification assembly 4 is disposed inside the bubble suppression assembly 2. The bubble purification assembly 4 includes a micro switch 401, a centrifugal slider 402, and a push rod 403. The rotation of the second honeycomb rectifier plate 206 drives the centrifugal slider 402 to slide under the action of centrifugal force. The push rod 403 contacts the micro switch 401 to drive the ultrasonic transducer mounted on the second honeycomb rectifier plate 206 to operate. The vibration of the second honeycomb rectifier plate 206 is used to shake off the attached bubbles and particles.

[0021] The laser particle size analyzer comprises an optical system, a sample dispersion system, a photodetector, and a data processing system. The optical system includes a laser, a beam expander collimating lens, and a Fourier lens, responsible for generating high-quality parallel light and collecting scattered light. The sample dispersion system uniformly disperses particles using a dry airflow. The photodetector converts scattered light signals from different angles into electrical signals. The data processing system then converts the light intensity distribution into a particle size distribution and outputs a report. Static light scattering refers to the different scattered light intensities at different angles, while dynamic light scattering refers to the fluctuations in scattered light intensity over time caused by the Brownian motion of nanoparticles. Dynamic light scattering primarily involves mounting the measurement optical path, including a fiber optic probe and a correlator integrated board, on a robotic arm driven by a stepper motor. The robotic arm can rotate around the sample cell. In dynamic mode, the robotic arm stops at a specific angle to collect fluctuation signals. In static mode, the robotic arm rotates continuously, and a multi-ring detector array collects scattered light intensity at different angles. This method shares both the laser and the sample cell, but the dynamic and static measurements are performed in a time-division multiplexing manner. The software merges the two sets of data to generate a complete particle size distribution curve.

[0022] Preferred, according to Figure 2 and Figure 3As shown, an automatic circulating dispersion chamber 101 is installed on one side of the main unit 100. A circulation tank 102 is located inside the automatic circulating dispersion chamber 101. A water pump is installed inside the circulation tank 102. A first water inlet pipe 104 and a first water outlet pipe 105 are both located on one side of the circulation tank 102. A second water inlet pipe 108 is connected to one end of the first water inlet pipe 104. One end of the second water inlet pipe 108 is inserted and connected to the progressive cone 203 inside the inhibition chamber 202. The sample tank 103 is equipped with... A lens collecting plate 107 is provided. A second water inlet pipe 108 extends from the other side of the progressive cone 203 to one side of the sample cell 103. A second water outlet pipe 109 is provided at one end of the first water outlet pipe 105, and one end of the second water outlet pipe 109 is connected to one side of the sample cell 103. An indicator light 106 is provided on one side of the automatic circulating dispersion box 101, which is used to sweep the water vertically upward across the sample cell 103 to discharge the air bubbles upward. The automatic circulating dispersion box 101 is fixedly installed on one side of the main unit 100, and the sample cell 103 is automatically... The pump is installed inside the main unit 100, and the circulation tank 102 is fixedly installed inside the automatic circulation dispersion box 101. One end of the water pump is connected to one end of the first water inlet pipe 104, and one end of the first water outlet pipe 105 is connected to one side of the circulation tank 102. As the water pump starts, the water in the circulation tank 102 flows into the second water inlet pipe 108 through the first water inlet pipe 104, and then is guided to the inside of the suppression chamber 202 through the second water inlet pipe 108. The water continues to flow along the lens collecting plate 107 and the sample cell 103. The water is transported straight upwards and flows back into the interior of the first outlet pipe 105 through the second outlet pipe 109. The water then flows back into the interior of the circulation pool 102 along the inner cavity of the first outlet pipe 105, realizing the recycling of the water flow. One end of the second inlet pipe 108 is inserted and connected to one side of the sample pool 103, and one end of the second outlet pipe 109 is inserted and connected to one side of the sample pool 103. The other end of the second outlet pipe 109 is fixedly inserted and connected to one end of the first outlet pipe 105. The two pipes are interconnected to realize the guidance of the water flow.

[0023] The water pump starts, extracting the uniformly mixed sample suspension from the circulation tank 102, primarily providing initial power for liquid flow. The water pumped by the pump first enters the first inlet pipe 104, then flows into the second inlet pipe 108. The second inlet pipe 108 delivers the water to the interior of the suppression chamber 202. After treatment, the water is guided through the extended second inlet pipe 108 to the interior of the sample cell 103. After entering the suppression chamber 202, the water flows along the direction of the lens collecting plate 107, forming a vertical upward flow within the sample cell 103. This upward flow counteracts gravity, preventing large particles from settling at the bottom of the sample cell 103 and ensuring that the particles remain suspended. As the laser beam passes through, the water flows upward, and the air bubbles naturally follow, exiting from the top to avoid interfering with the laser. The water flowing through the sample cell 103 is drawn into the second outlet pipe 109 from the top outlet, then through the first outlet pipe 105, and finally flows back into the circulation cell 102. The water completes a closed loop, carrying the particles detected by the laser in the sample cell 103 back to the circulation cell 102. In the circulation cell 102, these particles are remixed with the sample in the cell, then pumped away again for testing. Through this cycle, the instrument can measure tens of thousands of particles in a few minutes and obtain the average result of laser particle size detection.

[0024] To address the issue of slight vibrations in the inlet pipe caused by sudden pressure changes, an anti-bubble component 2 is installed to decompose kinetic energy through the collision between the pipe wall and the water flow.

[0025] Preferably, the specific working process of the bubble suppression component 2 is as follows: Figure 4 and Figure 6As shown, the bubble suppression assembly 2 also includes a suppression cover plate 201, a suppression chamber 202, multiple first suppression holes 205, and multiple second suppression holes 207. The suppression chamber 202 is disposed inside the sample cell 103, and the suppression cover plate 201 is disposed on one side of the sample cell 103. The multiple first suppression holes 205 are respectively opened on the surface of the first honeycomb rectifier plate 204, and the multiple second suppression holes 207 are respectively opened on the surface of the second honeycomb rectifier plate 206. The bubble suppression assembly 2 also includes an auxiliary strip 208, a fan blade 209, and a pusher washer 211. The auxiliary strip 208 is disposed at the center of the second honeycomb rectifier plate 206, and the fan blade 209 is disposed at the center of the second honeycomb rectifier plate 206. Located at one end of the auxiliary strip 208, one side of multiple turbine blades 210 is connected to the outer surface of the fan blade 209, and the inner surface of the push washer 211 is connected to the other side of the multiple turbine blades 210, for driving the push washer 211 to rotate circumferentially. The suppression cover 201 is hinged to one side of the sample cell 103, and a sealed door is hinged to one side of the suppression chamber 202. The progressive cone 203 is disposed inside the suppression chamber 202. The second honeycomb rectifier plate 206 and the first honeycomb rectifier plate 204 are both disposed inside the progressive cone 203. The surface of the first honeycomb rectifier plate 204 is provided with multiple first suppression holes 205, such as... Figure 4 As shown, the second honeycomb rectifier 206 is located to the left of the first honeycomb rectifier 204. The first honeycomb rectifier 204 is located at the position with a large opening diameter of the progressive cone 203, and the second honeycomb rectifier 206 is located at the position with a small opening diameter of the progressive cone 203. The progressive cone 203 is a cone with an opening diameter that gradually decreases from right to left. The diameter of the second suppression hole 207 is smaller than the diameter of the first suppression hole 205. The auxiliary strip 208 is movably inserted and connected to one side of the second honeycomb rectifier 206. The fan blade 209 is fixedly sleeved on one end of the auxiliary strip 208. One side of the multiple turbine blades 210 is fixed to the outer surface of the fan blade 209, and the other side of the multiple turbine blades 210 is fixed to the inner surface of the push washer 211.

[0026] The water flow is first guided into the suppression chamber 202 through the first inlet pipe 104. As the water flows from the large-diameter end on the right side of the progressive cone 203 towards the small-diameter end on the left, the cross-sectional area of ​​the flow channel gradually decreases, resulting in a gradual increase in flow velocity and a gradual decrease in pressure. This process makes the water flow smoother, reducing the area of ​​vortex generation inside the progressive cone 203. The water first flows onto the surface of the first honeycomb rectifier plate 204 and then continues through multiple first suppression holes 205 to the surface of the second honeycomb rectifier plate 206. Upon reaching the surface of the second honeycomb rectifier plate 206, it also comes into contact with multiple turbine blades 210. The multiple first suppression holes 205 on the surface of the first honeycomb rectifier plate 204 divide the water flow into many fine jets, primarily breaking up a coarse stream in the first inlet pipe 104 to initially prevent large-scale turbulence. Simultaneously, it causes large-diameter bubbles to be initially broken up. After coarse rectification, the water flows into the smaller-diameter first... The second suppression hole 207 is further refined into a more uniform parallel flow. The design of gradually decreasing hole diameter avoids excessive resistance caused by sudden changes in hole diameter in a single-stage rectifier plate. At the same time, it can capture and break smaller microbubbles. The auxiliary strip 208 plays a central guiding role to prevent the water flow from forming a dead zone in the central area. When the water flow is guided to the second honeycomb rectifier plate 206, it impacts the fan blade 209, converting the linear kinetic energy of the water flow into rotational kinetic energy, which drives the push washer 211 to rotate. This also drives the auxiliary strip 208 to rotate on one side of the second honeycomb rectifier plate 206. The rotating turbine blade 210 disturbs the water flow. This disturbance is not chaotic turbulence, but regular vortices. The vortices can further break up bubbles and convert the fluid pressure into mechanical rotation to eliminate the impact force of the water flow. The water flow is introduced into the sample cell 103 in a parallel state for laser detection, reducing the risk that the first water inlet pipe 104 will affect the laser particle size detection under vibration.

[0027] It should be noted that bubbles can be broken into smaller bubbles in the vortex region of the progressive cone 203, and the smooth flow region can also reduce the generation of bubbles.

[0028] To address the issue of bubbles and particles adhering to the surface of the bubble suppression component 2, the bubble peeling component 3 is designed to remove and eliminate bubbles by applying shear force generated during tilting.

[0029] Preferably, the specific working process of the bubble removal component 3 is as follows: Figure 5 and Figure 7 As shown, the bubble-removing assembly 3 also includes multiple arc-shaped plates 302, multiple L-shaped plates 303, and multiple decomposition holes 305. One side of each of the multiple arc-shaped plates 302 is connected to one end of each of the multiple return springs 301, and the other end of each of the multiple return springs 301 is connected to the outer surface of the fan blade 209. One side of each of the multiple L-shaped plates 303 is connected to the outer wall of each of the multiple arc-shaped plates 302. Figure 10 As shown, multiple decomposition holes 305 are respectively opened on the surface of multiple stripping plates 304 to increase the area for water flow guidance. One end of multiple return springs 301 is fixedly connected to the outer wall of the fan blade 209, and the other end of multiple return springs 301 is fixedly connected to one side of the arc plate 302. Two L-shaped plates 303 are fixedly installed on one side of each of the multiple arc plates 302. Stripping plates 304 are fixedly installed between the inner walls of two adjacent L-shaped plates 303. Two decomposition holes 305 are opened on the outer surface of each of the multiple stripping plates 304. The bubble stripping assembly 3 is attached to the rotating auxiliary strip 208 and the fan blade 209. When the auxiliary strip 208 of the entire bubble suppression assembly 2 rotates, the previous water flow... Driven by the impact fan blades 209 and turbine blades 210, the arc-shaped plate 302 mounted on the rotating component is subjected to centrifugal force and will be thrown outward. At the same time, the water flow is also constantly impacting the arc-shaped plate 302. Under the combined action of centrifugal force and water flow impact force, the arc-shaped plate 302 will overcome the tension of the return spring 301 and tilt outward at a certain angle. This tilting movement is transmitted to the stripping plate 304 through the L-shaped plate 303, so that the stripping plate 304, like a small scraper, closely adheres to or sweeps across the surface of the second honeycomb rectifier plate 206. When the stripping plate 304 sweeps across the rectifier plate surface, it will generate a shearing force on the bubbles and particles attached to the plate surface and the edge of the second suppression hole 207, forcibly peeling the bubbles off the plate surface.

[0030] Furthermore, the decomposition holes 305 allow some water flow to pass through, preventing the stripping sheet 304 from breaking due to excessive water flow resistance. When the air bubbles scraped off by the stripping sheet 304 are carried by the water flow through these small holes, the shrinkage of the hole diameter will squeeze and shear the air bubbles, further breaking them into smaller air bubbles, making them easier to eliminate and remove.

[0031] To address the issue of bubbles and particles near the pores of the bubble suppression component 2, the bubble purification component 4 is configured to trigger an ultrasonic transducer, causing the bubble suppression component 2 to vibrate and shake off the bubbles and particles.

[0032] Preferably, the specific working process of the purification bubble component 4 is as follows: Figure 8 and Figure 9As shown, the purification bubble assembly 4 also includes a trigger groove 404 and a centrifugal slide 405. The trigger groove 404 is formed on the surface of the second honeycomb rectifier plate 206, and the centrifugal slide 405 is formed on the inner surface of the trigger groove 404. The centrifugal slider 402 slides inside the centrifugal slide 405. One end of the push rod 403 is connected to one side of the centrifugal slider 402. A micro switch 401 is fixedly installed inside the second honeycomb rectifier plate 206. The centrifugal slider 402 slides inside the trigger groove 404, and the push rod... One end of 403 is fixedly connected to one side of the centrifugal slider 402. The trigger groove 404 is the outer recess, and the centrifugal slide 405 is the inner guide rail. The centrifugal slider 402 can slide radially in the centrifugal slide 405. The push rod 403 moves together with the centrifugal slider 402. When the centrifugal slider 402 slides to a specific position, the push rod 403 will touch the micro switch 401. When the water flows smoothly and the flow rate is normal, the turbine blades 210 and the fan blades 209 of the entire bubble suppression assembly 2 are driven by the fluid. The centrifugal slider 402, mounted on the second honeycomb rectifier plate 206, is subjected to centrifugal force and slides outward along the centrifugal groove 405, driving the push rod 403 to move outward. At this time, the push rod 403 moves away from the micro switch 401, and the micro switch 401 is in the off state, so the ultrasonic wave does not work. When the second suppression hole 207 of the second honeycomb rectifier plate 206 is blocked by air bubbles or particles, the flow cross-sectional area decreases, the water flow velocity through the second honeycomb rectifier plate 206 decreases, and the centrifugal slider 402 is subjected to centrifugal force. The centrifugal force is insufficient to overcome its own weight and resistance. Under the action of gravity, it slides inward along the centrifugal chute 405. The push rod 403 gradually approaches the micro switch 401. After applying pressure to the micro switch 401, the power supply of the ultrasonic generator is turned on. The ultrasonic transducer generates high-frequency vibration, which is transmitted to the surface of the bubble suppression assembly 2. The first honeycomb rectifier plate 204 and the second honeycomb rectifier plate 206 vibrate accordingly. The bubbles and particles attached to the surfaces of the two are shaken off, and the blocked particles are loosened and washed away with the water flow.

[0033] Working Principle: The laser particle size analyzer primarily measures the scattered light signal from the laser beam by the particles. Using a physical model, it calculates the particle size and distribution. First, a highly monochromatic parallel laser beam is emitted. When this beam illuminates a well-dispersed group of particles, each particle generates scattered light. The superposition of scattered light from numerous particles forms a specific energy distribution. After passing through a lens, light rays with the same scattering angle are focused onto the same point on the focal plane. A photodetector composed of multiple ring-shaped units is placed on the focal plane. The central detector measures the intensity of the unscattered direct light, while the outer ring detectors receive the energy of scattered light from different angles. Dynamic light scattering utilizes an optical fiber probe, a photon counter, and a digital correlator, typically employing a fixed-angle reception. Scattered signals are collected by mounting a fiber optic probe on a robotic arm. A rotating platform drives the robotic arm to rotate around the sample cell, receiving scattered light signals at different angles. In dynamic mode, the robotic arm stops at a specific angle to collect fluctuation signals. In static mode, the robotic arm rotates continuously, and a multi-ring detector array collects scattered light intensity at different angles. This method uses both a laser and a sample cell, but dynamic and static measurements are performed time-divisionally. A water pump drives water flow, delivering water to the sample cell through inlet and outlet pipes, which in turn circulates the particles in the sample cell. At the moment the water pump starts, the inlet pipe experiences a slight vibration due to the sudden pressure change. During this vibration, water is conducted to the sample cell. This vibration can still cause the laser particle size analyzer to misinterpret it as particle movement, mistaking the vibration for the slow motion of large particles, thus... Dynamic light scattering can lead to overly large particle sizes. Turbulent water flow causes deposits to form on the inner wall of the inlet pipe, increasing its roughness and reducing flow rate in localized areas. Under the influence of turbulent vortices, large air bubbles are torn into smaller bubbles, significantly increasing the overall bubble count. Since both particles and bubbles produce scattered light when illuminated by laser light, the detector cannot correctly distinguish between them. Furthermore, bubbles can suddenly burst due to pressure changes at the inlet pipe joint, causing impacts that intensify pipe vibration and further increase the frequency of shaking, affecting measurement accuracy. Therefore, bubble elimination is crucial. The water flow first enters the suppression chamber 202 through the first inlet pipe 104, flowing in from the large-diameter end on the right side of the progressive cone 203. As the water flows towards the smaller diameter end on the left, the cross-sectional area of ​​the flow channel gradually decreases, thus the water velocity gradually increases and the pressure gradually decreases. The water flow becomes smoother during this process, reducing the area of ​​vortex generation inside the progressive cone 203. The water first flows onto the surface of the first honeycomb rectifier plate 204, and then continues to the surface of the second honeycomb rectifier plate 206 through multiple first suppression holes 205. Upon reaching the surface of the second honeycomb rectifier plate 206, it also comes into contact with multiple turbine blades 210. The multiple first suppression holes 205 on the surface of the first honeycomb rectifier plate 204 divide the water flow into many fine jets, primarily breaking up the coarse flow in the first inlet pipe 104 to initially prevent large-scale turbulence, while simultaneously allowing large-diameter bubbles to be initially broken up at this point.After being coarsely rectified, the water flows into the second suppression orifice 207, which has a smaller aperture, and is further refined into a more uniform parallel flow. The design of gradually decreasing aperture avoids excessive resistance caused by sudden changes in aperture in a single-stage rectifier plate, while also capturing and breaking up smaller microbubbles. The auxiliary strip 208 acts as a central guide, preventing the water flow from forming dead zones in the central area. When the water flow is guided to the second honeycomb rectifier plate 206, it impacts the impeller blade 209, converting the linear kinetic energy of the water flow into rotational kinetic energy, which drives the drive washer 211 to rotate. This, in turn, causes the auxiliary strip 208 to rotate on one side of the second honeycomb rectifier plate 206. The rotating turbine blade 210 disturbs the water flow. This disturbance is not chaotic turbulence, but rather regular vortices. These vortices can further break up the water flow. The bubble-breaking mechanism converts fluid pressure into mechanical rotation to eliminate the impact force of the water flow. The water flow is then introduced into the sample cell 103 in a parallel state for laser detection, reducing the risk of vibration affecting laser particle size detection in the first inlet pipe 104. The bubble-suppressing assembly 3 is attached to the rotating auxiliary strip 208 and the fan blade 209. When the auxiliary strip 208 of the entire bubble-suppressing assembly 2 rotates, the previous water flow impacts the fan blade 209 and turbine blade 210, causing the arc-shaped plate 302 mounted on the rotating component to be thrown outwards by centrifugal force. Simultaneously, the water flow continuously impacts the arc-shaped plate 302. Under the combined action of centrifugal force and water flow impact, the arc-shaped plate 302 overcomes the tension of the return spring 301 and tilts outwards at a certain angle. This tilting motion is transmitted to the stripping plate 304 via the L-shaped plate 303, causing the stripping plate 304 to act like a small scraper, closely adhering to or sweeping across the surface of the second honeycomb rectifier plate 206. When the stripping plate 304 sweeps across the rectifier plate surface, it generates a shearing force on the bubbles and particles attached to the plate surface and the edges of the second suppression hole 207, forcibly peeling the bubbles off the plate surface. The trigger groove 404 is the outer layer of the pit, and the centrifugal slide 405 is the inner layer of the guide rail. The centrifugal slider 402 can slide radially in the centrifugal slide 405. The push rod 403 moves together with the centrifugal slider 402. When the centrifugal slider 402 slides to a specific position, the push rod 403 will touch the micro switch 401. When the water flows smoothly and the flow rate is normal, the turbine blades 210 of the entire bubble suppression assembly 2... As the agitator blade 209 rotates normally under fluid drive, the centrifugal slider 402, mounted on the second honeycomb rectifier plate 206, slides outward along the centrifugal groove 405 under centrifugal force, driving the push rod 403 to move outward. At this time, the push rod 403 moves away from the micro switch 401, and the micro switch 401 is in the off state, so the ultrasonic waves do not work. When the second suppression hole 207 of the second honeycomb rectifier plate 206 is blocked by air bubbles or particles, the flow cross-sectional area decreases, and the water flow velocity through the second honeycomb rectifier plate 206 decreases. The centrifugal force on the centrifugal slider 402 is insufficient to overcome its own weight and resistance. Under the action of gravity, it slides inward along the centrifugal groove 405, and the push rod 403 gradually approaches the micro switch 401, applying pressure to the micro switch 401.When the ultrasonic generator is powered on, the ultrasonic transducer generates high-frequency vibrations, which are transmitted to the surface of the bubble suppression assembly 2. The first honeycomb rectifier plate 204 and the second honeycomb rectifier plate 206 vibrate accordingly, shaking off the bubbles and particles attached to their surfaces. The clogging particles are loosened and washed away by the water flow.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser particle size analyzer for combined dynamic and static light scattering analysis, characterized in that, include: The host (100) and the sample cell (103) are movably disposed inside the host (100) to drive the particle circulation to realize the laser particle size detection of the detector; A bubble suppression assembly (2) is disposed inside the host (100). The bubble suppression assembly (2) includes a progressive cone (203), a first honeycomb rectifier plate (204), a second honeycomb rectifier plate (206), and multiple turbine blades (210). The first honeycomb rectifier plate (204) and the second honeycomb rectifier plate (206) are respectively disposed at both ends of the progressive cone (203) to disperse the turbulent incoming water into multiple parallel fine streams to reduce the number of bubbles. The progressive cone (203) is used to smoothly fill the entire cavity with water flow, eliminating dead angles and eddies generated by bubbles. The water flow impact drives multiple turbine blades (210) to rotate on one side of the second honeycomb rectifier plate (206) to prevent a large number of bubbles from adhering to the edge of the holes of the second honeycomb rectifier plate (206). The bubble removal assembly (3) is disposed inside the bubble suppression assembly (2). The bubble removal assembly (3) includes multiple return springs (301) and multiple peeling plates (304). The multiple return springs (301) are used to drive the peeling plates (304) to deflect, so that the bubbles attached to the surface of the peeling plates (304) are deformed and stretched under the action of shear force to break and eliminate them. A bubble purification assembly (4) is disposed inside a bubble suppression assembly (2). The bubble purification assembly (4) includes a micro switch (401), a centrifugal slider (402), and a push rod (403). The second honeycomb rectifier plate (206) rotates and drives the centrifugal slider (402) to slide under the action of centrifugal force. The push rod (403) contacts the micro switch (401) to drive the ultrasonic transducer mounted on the second honeycomb rectifier plate (206) to operate. The vibration of the second honeycomb rectifier plate (206) is used to shake off the attached bubbles and particles.

2. The laser particle size analyzer for combined dynamic and static light scattering analysis according to claim 1, characterized in that: The bubble suppression assembly (2) further includes a suppression cover plate (201), a suppression chamber (202), a plurality of first suppression holes (205) and a plurality of second suppression holes (207). The suppression chamber (202) is disposed inside the sample pool (103), the suppression cover plate (201) is disposed on one side of the sample pool (103), the plurality of first suppression holes (205) are respectively opened on the surface of the first honeycomb rectifier plate (204), and the plurality of second suppression holes (207) are respectively opened on the surface of the second honeycomb rectifier plate (206).

3. The laser particle size analyzer for combined dynamic and static light scattering analysis according to claim 2, characterized in that: The bubble suppression assembly (2) further includes an auxiliary strip (208), a fan blade (209), and a pusher washer (211). The auxiliary strip (208) is located at the center of the second honeycomb rectifier plate (206). The fan blade (209) is sleeved on one end of the auxiliary strip (208). One side of the plurality of turbine blades (210) is connected to the outer surface of the fan blade (209). The inner surface of the pusher washer (211) is connected to the other side of the plurality of turbine blades (210) to drive the pusher washer (211) to rotate circumferentially.

4. The laser particle size analyzer for combined dynamic and static light scattering analysis according to claim 1, characterized in that: The bubble stripping assembly (3) also includes multiple arc-shaped plates (302), multiple L-shaped plates (303), and multiple decomposition holes (305). One side of each of the multiple arc-shaped plates (302) is connected to one end of a multiple reset spring (301), and the other end of each of the multiple reset springs (301) is connected to the outer surface of the fan blade (209).

5. The laser particle size analyzer for combined dynamic and static light scattering analysis according to claim 4, characterized in that: One side of each of the L-shaped plates (303) is connected to the outer wall of each of the arc-shaped plates (302), and the multiple decomposition holes (305) are respectively opened on the surface of the multiple peeling plates (304) to increase the area for water flow guidance.

6. The laser particle size analyzer for combined dynamic and static light scattering analysis according to claim 1, characterized in that: The purification bubble assembly (4) further includes a trigger groove (404) and a centrifugal slide (405). The trigger groove (404) is formed on the surface of the second honeycomb rectifier plate (206). The centrifugal slide (405) is formed on the inner surface of the trigger groove (404). The centrifugal slider (402) slides inside the centrifugal slide (405). One end of the top rod (403) is connected to one side of the centrifugal slider (402).

7. The laser particle size analyzer for combined dynamic and static light scattering analysis according to claim 1, characterized in that: An automatic circulating dispersion box (101) is installed on one side of the host (100). A circulation pool (102) is provided inside the automatic circulating dispersion box (101). A water pump is provided inside the circulation pool (102). A first water inlet pipe (104) is provided on one side of the circulation pool (102).

8. The laser particle size analyzer for combined dynamic and static light scattering analysis according to claim 7, characterized in that: A first outlet pipe (105) is provided on one side of the circulation pool (102), and a second inlet pipe (108) is provided at one end of the first inlet pipe (104). One end of the second inlet pipe (108) is inserted and connected to the progressive cone (203) in the suppression chamber (202). A lens collecting plate (107) is provided inside the sample pool (103). The second inlet pipe (108) extends from the other side of the progressive cone (203) to one side of the sample pool (103).

9. The laser particle size analyzer for combined dynamic and static light scattering analysis according to claim 8, characterized in that: A second water outlet pipe (109) is provided at one end of the first water outlet pipe (105), and one end of the second water outlet pipe (109) is connected to one side of the sample pool (103).

10. The laser particle size analyzer for combined dynamic and static light scattering analysis according to claim 9, characterized in that: An indicator light (106) is provided on one side of the automatic circulating dispersion box (101) to sweep the water vertically upward across the sample cell (103) so that the bubbles are discharged upward.

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