A system for preparing ultrafine particles of a poorly soluble powder

Abstract

The application belongs to the technical field of super-micro particle preparation, and specifically discloses a preparation system for super-micro particles of difficult-to-dissolve powder, which comprises a connecting frame and a disturbance system, one side of the upper end of the connecting frame is connected with a preparation cylinder, one side of the upper end of the preparation cylinder is connected with a feeding pipe, the upper end of the preparation cylinder is connected with a connecting cylinder, the upper end of the connecting cylinder is connected with a gas inlet pipe in the middle, the lower end of the gas inlet pipe is connected with a rotary joint, and the lower end of the rotary joint is connected with a rotating pipe. Through the synergistic effect of the air injection mechanism, the disturbance mechanism and the material scattering mechanism, the problems of super-micro particle feeding blockage, compaction and accumulation and water blockage are effectively solved, and the preparation efficiency of the suspension agent and the product quality are improved.

Description

Technical Field

[0001] This invention belongs to the field of ultrafine particle preparation, and specifically discloses a system for preparing ultrafine particles for insoluble powders. Background Technology

[0002] The preparation of ultrafine particles from sparingly soluble powders is an important technological direction in the field of powder engineering. Sparingly soluble powders refer to solid substances with extremely low solubility in water or physiological media; ultrafine particles typically refer to fine particles with particle sizes ranging from 1 micrometer to tens of micrometers, or even submicrometer or nanometer scales. Preparing sparingly soluble powders into ultrafine particles can improve dissolution rates and dispersion stability, thereby enhancing their performance in aqueous media. This has broad application value in pharmaceuticals, pesticides, veterinary drugs, food, and fine chemicals.

[0003] In the fields of veterinary drugs and pesticides, common active ingredients such as albendazole, ivermectin, and pyraclostrobin are mostly poorly soluble powders, which need to be processed into ultrafine particles and uniformly dispersed in water to form suspensions. In existing technologies, ultrafine particles often face many problems during feeding, distribution, and mixing. Not only are the powders prone to bridging and clogging in the hopper, leading to poor feeding, but ultrafine particles also have high surface energy and are prone to agglomeration. When directly added to water, they often quickly accumulate and settle to the bottom, forming clumps, making it difficult to disperse them quickly and evenly. At the same time, traditional spreading devices have a limited distribution range, resulting in concentrated powder drop points, which further exacerbates local agglomeration. These problems not only affect the preparation efficiency of suspensions but also restrict the suspension stability and efficacy uniformity of the final product. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a system for preparing ultrafine particles of insoluble powders.

[0005] To achieve the above objectives, the present invention provides a system for preparing ultrafine particles of sparingly soluble powders, comprising a connecting frame and a disturbance system. A preparation cylinder is connected to one side of the upper end of the connecting frame, a feed pipe is connected to one side of the upper end of the preparation cylinder, a connecting cylinder is connected to the upper end of the preparation cylinder, an air inlet pipe is connected to the middle of the upper end of the connecting cylinder, a rotary joint is connected to the lower end of the air inlet pipe, a rotating tube is connected to the lower end of the rotary joint, and a driving mechanism is connected to the upper part of the outer wall of the rotating tube.

[0006] An air injection mechanism is connected to one side of the air inlet pipe. A connecting plate is connected to the upper part of the outer wall of the rotating pipe. A receiving ring is connected to the outer wall of the connecting plate. An air distribution mechanism is connected to the lower end of the air inlet pipe. A disturbance mechanism is connected to the lower end of each air distribution mechanism. There are three sets of disturbance mechanisms, and the three sets of disturbance mechanisms are evenly distributed inside the receiving ring.

[0007] The disturbance mechanism includes a mounting block, with air inlet pipes connected to both sides of the lower end of the mounting block, and air blowing nozzles connected to one end of each of the two air inlet pipes.

[0008] Both sides of the lower end of the mounting block are connected to sliding rods, and a sliding plate is slidably connected to the middle of the outer wall of the two sliding rods. A disturbance brush is connected to the lower end of the sliding plate, and air distribution plates are connected to both sides of the sliding plate. An air inlet groove is opened in the middle of one side of the air distribution plate, and an air distribution groove is opened circumferentially on the outer wall of the air distribution plate corresponding to the air inlet groove.

[0009] A material spreading mechanism is connected to the lower part of the outer wall of the rotating tube, and a stirring mechanism is connected to the lower end of the rotating tube.

[0010] Preferably, the lower end of the air inlet pipe extends through into the interior of the connecting cylinder, the receiving ring is located inside the preparation cylinder, the receiving ring is sleeved on the outer wall of the rotating tube, the inner wall of the receiving ring is connected to the outer wall of the rotating tube through mounting rods, and multiple mounting rods are used to ensure the stability of the receiving ring. A feeding pipe is connected to the middle of the lower end of the preparation cylinder, and a feeding valve is connected to the lower part of the outer wall of the feeding pipe.

[0011] Preferably, the driving mechanism includes a driving motor, which is fixed to one side of the connecting cylinder by a stabilizing block. The output end of the driving motor is connected to a driving gear, and a driven gear is meshed with one side of the driving gear. The inner wall of the driven gear is connected to the upper part of the outer wall of the rotating tube. An opening is provided on one side of the connecting cylinder corresponding to the driving gear, and one side of the driving gear is located inside the opening.

[0012] Preferably, the gas injection mechanism includes a gas supply pipe, one end of which is connected to one end of an air inlet pipe. One side of the gas supply pipe is installed on one side of the upper end of the preparation cylinder via a fixing block. One end of the gas supply pipe is connected to an insert pipe, one end of which is inserted into the inside of the feed pipe. A pulse nozzle is circumferentially connected to one side of the outer wall of the insert pipe, and the pulse nozzle is arranged in an inclined shape.

[0013] Preferably, the air distribution mechanism includes a connecting pipe, the upper end of which is connected to the lower end of the air inlet pipe, an air distribution valve connected to the upper part of the outer wall of the connecting pipe, and an air distribution pipe connected to the lower end of the connecting pipe. The air distribution pipe is C-shaped. The upper end of the mounting block is connected to the upper end of the inner wall of the preparation cylinder. The upper end of the air inlet pipe passes through the mounting block and the preparation cylinder in sequence and extends to the upper end of the preparation cylinder. The upper ends of the two air inlet pipes extend into the air distribution pipe. An air inlet valve is connected to the outer wall of each of the two air inlet pipes. The two air blowing nozzles are symmetrically arranged.

[0014] Preferably, the cross-sectional shape of the slide rod is semi-arc, and the slide plate has through holes at the two slide rods. The two slide rods are located inside the two through holes respectively. Compression springs are connected to the two slide rods on both sides of the slide plate. Two compression springs and two other compression springs are respectively sleeved on the outer wall of the two slide rods. One end of the four compression springs is connected to the lower end of the mounting block. The lower end of the slide plate is arc-shaped and its shape matches the shape of the inner wall of the receiving ring. The disturbance brush contacts the lower end of the inner wall of the receiving ring and is made of flexible material.

[0015] Preferably, the material spreading mechanism includes ten material spreading plates, all of which are circumferentially mounted to the outer wall of the rotating tube. The material spreading plates are fan-shaped, and micro jet nozzles are connected to one side of the outer wall of the rotating tube corresponding to the multiple material spreading plates.

[0016] Preferably, each of the four receiving rings has a discharge port at its lower end, and a screen is embedded in the inner wall of each of the four discharge ports. A connecting hopper is connected to each of the multiple screens at the lower end of the receiving ring, and a guide pipe is connected to the lower end of each of the multiple connecting hoppers. The multiple guide pipes are located above the spreading mechanism.

[0017] Preferably, the stirring mechanism includes a rotating shaft, the upper end of which is connected to the lower end of the rotating tube, and stirring plates are circumferentially connected to the lower part of the outer wall of the rotating shaft.

[0018] Preferably, the disturbance system includes a main control module, a pressure sensor, an external air intake device, an air path valve, an airflow disturbance module, and an air blowing and spreading module; the pressure sensor is installed in the air intake pipe to detect the airflow pressure in real time; the external air intake device is installed at the inlet of the air intake pipe to supply compressed air to the system; the air path valve is installed between the external air intake device and the air injection mechanism and the air distribution mechanism to regulate the gas flow and on / off of each branch.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention utilizes a pulse nozzle in the air injection mechanism to intermittently inject air at an inclined angle into the feed pipe, forming a dynamic air curtain at the feed pipe outlet. This disperses the falling ultrafine particles, effectively disrupting the bridging structure formed by the natural accumulation of powder due to gravity. The pulsed air supply method avoids powder scattering caused by continuous airflow, ensuring both anti-clogging effectiveness and saving compressed air consumption, thus solving the problem of easy clogging at the powder feed inlet in existing technologies.

[0021] This invention utilizes two symmetrically arranged air nozzles to alternately pulse air, driving a sliding plate to move a disturbance brush reciprocating above the inner wall of the receiving ring. This achieves active mechanical agitation of the powder. Simultaneously, airflow escaping from the edge of the air distribution plate directly blows onto the powder, assisting in breaking up agglomerated particles. The reciprocating motion of the disturbance brush can be achieved pneumatically, effectively preventing powder from compacting and accumulating on the inner wall of the receiving ring.

[0022] This invention utilizes a fan-shaped spreading plate that rotates at high speed with a rotating tube to scatter powder around the preparation cylinder under centrifugal force. Simultaneously, a micro-jet nozzle sprays a high-speed auxiliary airflow to further disperse the scattered powder, forming a powder cloud. This ensures that the powder is evenly distributed above the liquid surface within the preparation cylinder. The combined effect of centrifugal scattering and airflow-assisted dispersion significantly improves the uniformity of powder distribution, preventing localized accumulation and clumping of powder when it enters the water. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall structure of the preparation tube of the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of the preparation tube of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the three sets of disturbance mechanisms of the present invention located in the receiving ring;

[0027] Figure 5 This is a schematic diagram of the installation structure of the feed tube of the present invention;

[0028] Figure 6 This is a schematic diagram of the installation structure of the material spreading mechanism of the present invention;

[0029] Figure 7 This is a schematic diagram of the overall structure of the disturbance mechanism of the present invention;

[0030] Figure 8 This is a schematic diagram of the opening structure of the air inlet and air distribution groove on the air distribution plate of the present invention.

[0031] Figure 9 This is a schematic diagram of the system structure of the disturbance system of the present invention.

[0032] In the diagram: 1. Connecting frame; 2. Preparation cylinder; 3. Feed pipe; 4. Connecting cylinder; 5. Air inlet pipe; 6. Rotary joint; 7. Rotating pipe; 8. Drive motor; 9. Drive gear; 10. Driven gear; 11. Air delivery pipe; 12. Insertion pipe; 13. Pulse nozzle; 14. Connecting plate; 15. Material receiving ring; 16. Connecting pipe; 17. Air distribution pipe; 18. Mounting block; 19. Air inlet pipe; 20. Air blowing nozzle; 21. Slide rod; 22. Slide plate; 23. Compression spring; 24. Disturbance brush; 25. Air distribution plate; 26. Air flushing groove; 27. Air distribution groove; 28. Screen; 29. ​​Connecting hopper; 30. Guide pipe; 31. Spreading plate; 32. Micro jet nozzle; 33. Rotating shaft; 34. Stirring plate; 35. Discharge pipe. Detailed Implementation

[0033] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0035] like Figures 1-9 The system shown is for preparing ultrafine particles of sparingly soluble powders. It includes a connecting frame 1 and a disturbance system. A preparation cylinder 2 is connected to one side of the upper end of the connecting frame 1. A feed pipe 3 is connected to one side of the upper end of the preparation cylinder 2. A connecting cylinder 4 is connected to the upper end of the preparation cylinder 2. An air inlet pipe 5 is connected to the middle of the upper end of the connecting cylinder 4. A rotary joint 6 is connected to the lower end of the air inlet pipe 5. A rotating pipe 7 is connected to the lower end of the rotary joint 6. A driving mechanism is connected to the upper part of the outer wall of the rotating pipe 7. An air injection mechanism is connected to one side of the air inlet pipe 5. A connecting plate 14 is connected to the upper part of the outer wall of the rotating pipe 7. A receiving ring 15 is connected to the outer wall of the connecting plate 14. An air distribution mechanism is connected to the lower end of the air inlet pipe 5. A disturbance mechanism is connected to the lower end of each air distribution mechanism. The mechanism consists of three sets, which are evenly distributed inside the receiving ring 15. Each set includes a mounting block 18, with air inlet pipes 19 connected to both sides of the lower end of the mounting block 18. One end of each air inlet pipe 19 is connected to an air blowing nozzle 20. Slide rods 21 are connected to both sides of the lower end of the mounting block 18. A slide plate 22 is slidably connected to the middle of the outer wall of each slide rod 21. A disturbance brush 24 is connected to the lower end of the slide plate 22. Air distribution plates 25 are connected to both sides of the slide plate 22. An air chute 26 is opened in the middle of one side of the air distribution plate 25. A circumferential air distribution groove 27 is opened on the outer wall of the air distribution plate 25 corresponding to the air chute 26. A material spreading mechanism is connected to the lower part of the outer wall of the rotating pipe 7, and a stirring mechanism is connected to the lower end of the rotating pipe 7.

[0036] A water inlet pipe is connected to one side of the preparation cylinder 2. The preparation cylinder 2 is used to contain liquid media and provide a mixing space for powder and liquid. The feed pipe 3 is used to input ultrafine particles into the preparation cylinder 2. The air inlet pipe 5 is used to input compressed air into the air injection mechanism, air distribution mechanism and material spreading mechanism. The rotary joint 6 realizes the gas transmission between the stationary air inlet pipe 5 and the rotating rotary pipe 7. The drive mechanism is used to drive the rotating pipe 7 to rotate.

[0037] The air injection mechanism is used to spray air into the feed pipe 3 to prevent powder blockage. The connecting plate 14 is used to fix the receiving ring 15. The receiving ring 15 is used to receive and temporarily store ultrafine particles. The air distribution mechanism distributes compressed air to each disturbance mechanism. The disturbance mechanism turns over and disperses the ultrafine particles in the receiving ring 15.

[0038] The air inlet pipe 19 supplies compressed air to the air blowing nozzle 20, which is used to spray airflow onto the air distribution plate 25. The air blowing nozzle 20 has an air blowing valve. The slide rod 21 is used to guide the sliding of the slide plate 22. The slide plate 22 is used to install the disturbance brush 24 and the air distribution plate 25. The disturbance brush 24 is used to agitate the powder on the inner wall of the material ring 15. The air distribution plate 25 is used to receive the airflow from the air blowing nozzle 20 and disperse the airflow. An air purging groove 26 is provided in the middle of one side of the air distribution plate 25. The air purging groove 26 is used to receive the airflow sprayed from the air blowing nozzle 20. The outer wall of the air distribution plate 25 corresponding to the air purging groove 26 is provided with a circumferential air distribution groove 27. The air distribution groove 27 is used to disperse the airflow circumferentially to expand the disturbance range.

[0039] A material spreading mechanism is connected to the lower part of the outer wall of the rotating tube 7. The material spreading mechanism is used to evenly spread the powder into the preparation cylinder 2. A stirring mechanism is connected to the lower end of the rotating tube 7. The stirring mechanism is used to stir the liquid in the preparation cylinder 2.

[0040] Ultrafine particles enter the system through the feed pipe 3. The air injection mechanism sprays air into the feed pipe 3 to prevent the powder from clogging at the feed inlet. The powder falls into the receiving ring 15. The drive mechanism drives the rotating pipe 7 to rotate. The receiving ring 15 rotates synchronously with the rotating pipe 7. The air distribution mechanism supplies air to the disturbance mechanism. The disturbance mechanism turns and disperses the powder in the receiving ring 15 to prevent the powder from being compacted and agglomerated.

[0041] The lower end of the air inlet pipe 5 extends through the inside of the connecting cylinder 4. The receiving ring 15 is located inside the preparation cylinder 2. The receiving ring 15 is sleeved on the outer wall of the rotating tube 7. The inner wall of the receiving ring 15 is connected to the outer wall of the rotating tube 7 through the mounting rod. Multiple mounting rods are used to ensure the stability of the receiving ring 15. The middle of the lower end of the preparation cylinder 2 is connected to the discharge pipe 35. The lower part of the outer wall of the discharge pipe 35 is connected to the discharge valve.

[0042] The air inlet pipe 5 is used to deliver compressed air to the rotary pipe 7. The receiving ring 15 receives the powder in the preparation cylinder 2. The receiving ring 15 rotates synchronously with the rotary pipe 7. The discharge pipe 35 discharges the prepared suspension. The discharge valve is used to control the opening and closing of the discharge pipe 35.

[0043] The receiving ring 15 is fixed to the outer wall of the rotating tube 7 by the mounting rod, and is used to rotate synchronously with the rotating tube 7, which ensures the structural stability of the receiving ring 15 under high-speed rotation. The bottom of the preparation cylinder 2 is provided with a discharge pipe 35 and a discharge valve, which are used to discharge the suspension after the preparation is completed.

[0044] like Figure 3 As shown: The drive mechanism includes a drive motor 8, which is fixed to one side of the connecting cylinder 4 by a stabilizing block. The output end of the drive motor 8 is connected to a drive gear 9, and a driven gear 10 is meshed with one side of the drive gear 9. The inner wall of the driven gear 10 is connected to the upper part of the outer wall of the rotating tube 7. An opening is provided on one side of the connecting cylinder 4 corresponding to the drive gear 9, and one side of the drive gear 9 is located inside the opening.

[0045] The drive motor 8 is used to ensure the installation stability of the drive motor 8, the drive gear 9 is used to transmit power, the driven gear 10 is used to receive the power of the drive gear 9 and drive the rotating tube 7 to rotate, and the driven gear 10 transmits the power to the rotating tube 7.

[0046] After the drive motor 8 starts, it drives the drive gear 9 to rotate. The drive gear 9 drives the driven gear 10 to rotate through meshing. The driven gear 10 drives the rotating tube 7 to rotate, thereby driving the receiving ring 15, the disturbance mechanism and the spreading mechanism to rotate synchronously.

[0047] like Figures 2-3 As shown: The gas injection mechanism includes a gas supply pipe 11. One end of the gas supply pipe 11 is connected to one end of the gas inlet pipe 5. One side of the gas supply pipe 11 is installed to one side of the upper end of the preparation cylinder 2 through a fixing block. One end of the gas supply pipe 11 is connected to an insertion tube 12. One end of the insertion tube 12 is inserted into the inside of the feed pipe 3. One side of the outer wall of the insertion tube 12 is circumferentially connected to a pulse nozzle 13. The pulse nozzle 13 is set in an inclined shape.

[0048] The air supply pipe 11 obtains compressed air from the air inlet pipe 5, the insertion pipe 12 introduces the compressed air into the feed pipe 3, and the pulse nozzle 13 is used to spray air into the feed pipe 3 in a pulse manner. The inclined pulse nozzle 13 sprays the airflow in the direction of powder falling.

[0049] Compressed air enters the air delivery pipe 11 through the air inlet pipe 5, and is then delivered to the pulse nozzle 13 through the insertion pipe 12. The pulse nozzle 13 is used to spray air into the feed pipe 3 at an inclined angle to form an air curtain at the outlet of the feed pipe 3, which is used to disperse the falling powder and prevent the powder from bridging and clogging at the feed inlet. The pulse nozzle 13 adopts intermittent pulse air supply to avoid powder flying caused by continuous air supply.

[0050] like Figures 5-6 As shown: The air distribution mechanism includes a connecting pipe 16, the upper end of which is connected to the lower end of the air inlet pipe 5. An air distribution valve is connected to the upper part of the outer wall of the connecting pipe 16. An air distribution pipe 17 is connected to the lower end of the connecting pipe 16. The air distribution pipe 17 is C-shaped. The upper end of the mounting block 18 is connected to the upper end of the inner wall of the preparation cylinder 2. The upper end of the air inlet pipe 19 passes through the mounting block 18 and the preparation cylinder 2 and extends to the upper end of the preparation cylinder 2. The upper ends of the two air inlet pipes 19 extend into the interior of the air distribution pipe 17. An air inlet valve is connected to the outer wall of each of the two air inlet pipes 19. Two air blowing nozzles 20 are symmetrically arranged.

[0051] The connecting pipe 16 is used to receive compressed air, the air distribution valve is used to adjust the total air supply, the air distribution pipe 17 distributes compressed air to each air inlet pipe 19, the air distribution pipe 17 is arranged around the rotating pipe 7 to facilitate the supply of air to multiple disturbance mechanisms, the air inlet pipe 19 introduces compressed air from the air distribution pipe 17 into the air blowing nozzle 20, the upper ends of the two air inlet pipes 19 extend through into the interior of the air distribution pipe 17 to receive the gas distributed by the air distribution pipe 17, the air inlet valve is used to adjust the gas flow rate of each air inlet pipe 19 respectively, and the two air blowing nozzles 20 are used to spray air from both sides onto the air distribution plate 25.

[0052] Compressed air enters the connecting pipe 16 through the inlet pipe 5, and after the flow rate is regulated by the air distribution valve, it enters the C-shaped air distribution pipe 17. The air distribution pipe 17 distributes the gas to two air inlet pipes 19, and the air inlet pipes 19 deliver the gas to the air blowing nozzle 20. The air distribution valve controls the total air volume, and the air inlet valves control the air volume of each branch, so as to achieve precise air supply. Through the structure of the C-shaped air distribution pipe 17 and the double air inlet pipes 19, uniform air supply to the three sets of disturbance mechanisms is achieved, ensuring the consistency of the operation of each disturbance mechanism.

[0053] like Figures 6-7 As shown: The cross-sectional shape of the slide rod 21 is semi-arc. The slide plate 22 has through holes corresponding to the two slide rods 21. The two slide rods 21 are located inside the two through holes. Compression springs 23 are connected to both sides of the slide plate 22 corresponding to the two slide rods 21. Two compression springs 23 and two other compression springs 23 are respectively sleeved on the outer wall of the two slide rods 21. One end of the four compression springs 23 is connected to the lower end of the mounting block 18. The lower end of the slide plate 22 is arc-shaped. The shape of the lower end of the slide plate 22 is adapted to the shape of the inner wall of the receiving ring 15. The disturbance brush 24 contacts the lower end of the inner wall of the receiving ring 15. The disturbance brush 24 is made of flexible material.

[0054] The slide bar 21 reduces the frictional resistance with the slide plate 22, and the compression spring 23 applies a downward elastic force to the slide plate 22, so that the disturbance brush 24 always maintains elastic contact with the inner wall of the receiving ring 15.

[0055] Two air nozzles 20 are located on the left and right sides of the slide plate 22, respectively. The two air nozzles 20 are connected to the air distribution mechanism through independent air inlet pipes 19. Independent air inlet valves are provided on the air inlet pipes 19 to control the air supply to the left air nozzle 20 and the right air nozzle 20, respectively.

[0056] During operation, the left air nozzle 20 is turned on to supply air, while the right air nozzle 20 is turned off. The high-speed airflow ejected from the left air nozzle 20 rushes towards the air distribution plate 25 on the left side of the slide plate 22. The airflow enters the air distribution groove 27 through the air inlet 26 and disperses in the circumferential direction before acting on the left side of the slide plate 22. Driven by the airflow, the slide plate 22 overcomes the elastic force of the compression spring 23 and slides to the right, causing the disturbance brush 24 to move to the right. During the movement, the disturbance brush 24 turns and scrapes the powder on the inner wall of the material receiving ring 15.

[0057] Subsequently, the left air nozzle 20 is closed, and the right air nozzle 20 is turned on to supply air. The high-speed airflow ejected from the right air nozzle 20 rushes toward the air distribution plate 25 on the right side of the slide plate 22. The airflow enters the air distribution groove 27 through the air inlet 26, disperses in the circumferential direction, and acts on the right side of the slide plate 22. Driven by the airflow, the slide plate 22 slides to the left, causing the disturbance brush 24 to move to the left, and once again turning over the powder on the inner wall of the material ring 15.

[0058] Through the alternating pulse air supply of the left and right air nozzles 20, the slide plate 22 drives the disturbance brush 24 to swing back and forth above the inner wall of the receiving ring 15, so as to realize the continuous turning and dispersing of the powder in the receiving ring 15. The compression spring 23 always provides downward elastic force during the sliding process of the slide plate 22.

[0059] Meanwhile, the airflow ejected from the air nozzle 20 is dispersed by the air purging groove 26 and the air distribution groove 27. Some of the airflow escapes from the edge of the air distribution plate 25 and blows directly onto the powder in the receiving ring 15 to help break up the agglomerated particles and prevent the powder from being compacted and accumulated on the inner wall of the receiving ring 15.

[0060] The lower end of the slide plate 22 is arc-shaped and matches the shape of the inner wall of the receiving ring 15. This ensures good contact between the agitator brush 24 and the inner wall of the receiving ring 15. The agitator brush 24 is made of flexible material to avoid damage to the inner wall of the receiving ring 15.

[0061] By alternately supplying pulsed air through two symmetrically arranged air nozzles 20, the slide plate 22 drives the disturbance brush 24 to swing back and forth, realizing the dual function of active mechanical turning of powder in the receiving ring 15 and airflow-assisted dispersion. The compression spring 23 ensures the elastic fit between the disturbance brush 24 and the inner wall of the receiving ring 15, avoiding damage to the equipment caused by rigid contact.

[0062] like Figures 3-6As shown: The material spreading mechanism includes a material spreading plate 31, and there are ten material spreading plates 31. All ten material spreading plates 31 are circumferentially installed on the outer wall of the rotating tube 7. The material spreading plates 31 are fan-shaped. A micro jet nozzle 32 is connected to one side of the outer wall of the rotating tube 7 corresponding to multiple material spreading plates 31.

[0063] Ten spreading plates 31 are circumferentially installed on the outer wall of the rotating tube 7 to achieve 360° circumferential uniform spreading. The micro jet nozzle 32 is used to spray auxiliary airflow to disperse the powder during the powder spreading process. The micro jet nozzle 32 is connected to the internal air passage of the rotating tube 7.

[0064] After initial dispersion by the receiving ring 15, the powder falls onto the spreading plate 31. The spreading plate 31 rotates at high speed with the rotating tube 7, and under the action of centrifugal force, it throws the powder in all directions. During the powder throwing process, the micro jet nozzle 32 sprays out a high-speed airflow, which further disperses the powder to form a powder cloud, so that the powder is evenly distributed above the liquid surface in the preparation cylinder 2. Through the cooperation of the fan-shaped spreading plate 31 and the micro jet nozzle 32, the dual effects of centrifugal throwing and airflow-assisted dispersion of the powder are realized, which significantly improves the uniformity of powder distribution and effectively avoids the powder from clumping when it enters the water.

[0065] like Figure 3 As shown: The receiving ring 15 has a discharge port at the lower end, and the inner wall of the four discharge ports is embedded with a screen 28. The lower end of the receiving ring 15 is connected to the multiple screens 28 and the lower end of the multiple connecting hoppers 29 is connected to the guide pipe 30. The multiple guide pipes 30 are located above the spreading mechanism. Three of the discharge ports are located below the three sets of disturbance mechanisms, and the other discharge port is located below the feed pipe 3.

[0066] The screen 28 is used to filter powder, ensuring that only powder with the correct particle size passes through. The connecting hopper 29 is used to collect the powder that passes through the screen 28. The guide pipe 30 guides the powder to the top of the spreading mechanism. Multiple guide pipes 30 accurately deliver the powder to the spreading plate 31.

[0067] After being agitated and dispersed by the agitation mechanism, the powder enters the screen 28 through the discharge port at the bottom of the receiving ring 15. The screen 28 filters the powder to ensure that only powder with qualified particle size passes through. Unqualified powder continues to be agitated by the agitation mechanism in the receiving ring 15. Qualified powder falls into the spreading mechanism through the connecting hopper 29 and the guide pipe 30.

[0068] like Figure 4 As shown: The stirring mechanism includes a rotating shaft 33, the upper end of which is connected to the lower end of the rotating tube 7, and stirring plates 34 are circumferentially connected to the lower part of the outer wall of the rotating shaft 33.

[0069] When the rotating tube 7 rotates, it drives the rotating shaft 33 to rotate synchronously. The rotating shaft 33 drives the stirring plate 34 to rotate. The stirring plate 34 continuously stirs the liquid in the lower part of the preparation cylinder 2, promotes the mixing of powder and liquid, and prevents the powder from settling and clumping. Through the continuous stirring of the stirring plate 34, the uniform dispersion of powder in the liquid is ensured, and the stability of the suspending agent is improved.

[0070] like Figure 9 As shown: The disturbance system includes a main control module, a pressure sensor, an external air intake device, air circuit valves, an airflow disturbance module, and an air blowing and spreading module; the pressure sensor is installed in the air intake pipe 5 to detect the airflow pressure in real time; the external air intake device is installed at the inlet of the air intake pipe 5 to supply compressed air to the system; the air circuit valves are installed between the external air intake device and the air injection mechanism and air distribution mechanism to regulate the gas flow and on / off of each branch;

[0071] As the core of the system, the main control module receives air pressure signals from the air pressure sensor in real time. When the air pressure sensor detects that the air pressure is lower than the set value, the main control module controls the external air intake device to increase the air supply; when the air pressure is higher than the set value, it reduces the air supply. At the same time, the main control module controls the opening of the air circuit valves according to process requirements, precisely adjusting the gas flow rate delivered to the air injection mechanism and the air distribution mechanism, realizing the coordinated operation of the pulse nozzle 13, the blowing nozzle 20, and the micro jet nozzle 32. Through the closed-loop control of the main control module, the air pressure sensor, the external air intake device, and the air circuit valves, the automatic adjustment of the system's air supply and the precise distribution of the flow rate of each air circuit are realized, ensuring the stability and consistency of the system's operation and improving the system's automation level and production efficiency.

[0072] Working principle: Water is injected into the preparation cylinder 2 through the water inlet pipe on one side, and ultrafine particles are put into the system through the feed pipe 3. At the same time, the pulse nozzle 13 of the air injection mechanism sprays an inclined airflow into the feed pipe 3 in an intermittent pulse manner, forming a dynamic air curtain at the outlet of the feed pipe 3. When the powder falls to the outlet of the feed pipe 3, it is dispersed by the high-speed airflow, which destroys the bridging structure formed by the natural accumulation of the powder due to gravity, thus avoiding the powder from clogging at the outlet.

[0073] The dispersed powder falls into the receiving ring 15. The drive motor 8 drives the rotating tube 7 to rotate through gear transmission. The receiving ring 15 rotates synchronously with the rotating tube 7. The air distribution mechanism distributes compressed air to three sets of disturbance mechanisms. The two blowing nozzles 20 of each disturbance mechanism alternately pulse air supply under the control of independent air inlet valves. When the left blowing nozzle 20 is opened, the high-speed airflow impacts the left air distribution plate 25, enters the air distribution groove 27 through the air purging groove 26 and disperses circumferentially. This pushes the slide plate 22 to slide to the right against the elastic force of the compression spring 23, causing the disturbance brush 24 to move to the right and flip. The powder is moved; then the left air nozzle 20 is closed and the right air nozzle 20 is opened, pushing the slide plate 22 to slide to the left. Through the alternating pulse air supply of the left and right air nozzles 20, the slide plate 22 drives the disturbance brush 24 to swing back and forth above the inner wall of the receiving ring 15. The compression spring 23 always provides downward elastic force. At the same time, the airflow escaping from the edge of the air distribution plate 25 blows directly onto the powder in the receiving ring 15, helping to disperse the agglomerated particles. This process realizes the dual effect of active mechanical turning of the powder and airflow-assisted dispersion, effectively preventing the powder from being compacted and accumulated on the inner wall of the receiving ring 15.

[0074] After being agitated and dispersed by the disturbance mechanism, the powder enters the screen 28 through the discharge port at the bottom of the receiving ring 15. The screen 28 prevents large agglomerates from falling directly and assists in dispersing them. The powder then falls into the spreading mechanism below through the connecting hopper 29 and the guide pipe 30. Powder with unqualified particle size is blocked by the screen 28 and continues to be agitated and dispersed by the disturbance mechanism within the receiving ring 15 until it passes through after the particle size is qualified.

[0075] Qualified powder falls onto the spreading plate 31 through the guide pipe 30. The spreading plate 31 rotates at high speed with the rotating pipe 7, and under the action of centrifugal force, it throws the powder around the preparation cylinder 2. At the same time, the micro jet nozzles 32 set on the outer wall of the rotating pipe 7 corresponding to the spreading plate 31 spray out high-speed auxiliary airflow, which further disperses the powder being thrown to form a powder cloud, so that the powder is evenly distributed above the liquid surface in the preparation cylinder 2. The dual effect of centrifugal throwing and airflow-assisted dispersion significantly improves the uniformity of powder distribution and avoids local accumulation and agglomeration of powder when it enters water from the source.

[0076] After the powder cloud comes into contact with the liquid in the preparation cylinder 2, it is fully mixed under the action of the stirring mechanism. The rotating shaft 33 rotates synchronously with the rotating tube 7, driving the stirring plate 34 to rotate, continuously stirring the liquid in the lower part of the preparation cylinder 2, promoting the uniform dispersion of powder and liquid, preventing powder from settling and clumping, and ensuring the stability of the suspending agent.

[0077] As the core of the system, the main control module receives the air pressure signal from the air pressure sensor installed in the air intake pipe 5 in real time. When the air pressure sensor detects that the air pressure is lower than the set value, the main control module controls the external air intake equipment to increase the air supply. When the air pressure is higher than the set value, the air supply is reduced. At the same time, the main control module controls the opening of the air circuit valves according to the process requirements, and precisely adjusts the gas flow rate delivered to the air injection mechanism and the air distribution mechanism to realize the coordinated pulse operation of the pulse nozzle 13, the blowing nozzle 20 and the micro jet nozzle 32. This closed-loop control mechanism realizes the automatic adjustment of the system air supply and the precise distribution of the flow rate of each air circuit, ensuring the stability and consistency of the system operation under disturbance.

[0078] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A system for preparing ultrafine particles of sparingly soluble powder, comprising a connecting frame (1) and a perturbation system, characterized in that, The upper end of the connecting frame (1) is connected to a preparation cylinder (2), the upper end of the preparation cylinder (2) is connected to a feed pipe (3), the upper end of the preparation cylinder (2) is connected to a connecting cylinder (4), the middle of the upper end of the connecting cylinder (4) is connected to an air inlet pipe (5), the lower end of the air inlet pipe (5) is connected to a rotating joint (6), the lower end of the rotating joint (6) is connected to a rotating pipe (7), and the upper part of the outer wall of the rotating pipe (7) is connected to a driving mechanism. An air injection mechanism is connected to one side of the air inlet pipe (5), a connecting plate (14) is connected to the upper part of the outer wall of the rotating pipe (7), a receiving ring (15) is connected to the outer wall of the connecting plate (14), an air distribution mechanism is connected to the lower end of the air inlet pipe (5), and a disturbance mechanism is connected to the lower end of each air distribution mechanism. There are three sets of disturbance mechanisms, and the three sets of disturbance mechanisms are evenly distributed inside the receiving ring (15). The disturbance mechanism includes a mounting block (18), and air inlet pipes (19) are connected to both sides of the lower end of the mounting block (18). One end of each of the two air inlet pipes (19) is connected to an air blowing nozzle (20). The mounting block (18) is connected to sliding rods (21) on both sides of its lower end. Slide plates (22) are slidably connected to the middle of the outer walls of the two sliding rods (21). A disturbance brush (24) is connected to the lower end of the slide plates (22). Air distribution plates (25) are connected to both sides of the slide plates (22). An air inlet groove (26) is opened in the middle of one side of the air distribution plate (25). An air distribution groove (27) is opened circumferentially on the outer wall of the air distribution plate (25) corresponding to the air inlet groove (26). The lower part of the outer wall of the rotating tube (7) is connected to a material spreading mechanism, and the lower end of the rotating tube (7) is connected to a stirring mechanism.

2. The system for preparing ultrafine particles of sparingly soluble powder according to claim 1, characterized in that, The lower end of the air inlet pipe (5) extends through to the inside of the connecting cylinder (4). The receiving ring (15) is located inside the preparation cylinder (2). The receiving ring (15) is sleeved on the outer wall of the rotating tube (7). The inner wall of the receiving ring (15) is connected to the outer wall of the rotating tube (7) through the mounting rod. Multiple mounting rods are used to ensure the stability of the receiving ring (15). The middle of the lower end of the preparation cylinder (2) is connected to the discharge pipe (35). The lower part of the outer wall of the discharge pipe (35) is connected to the discharge valve.

3. The system for preparing ultrafine particles of sparingly soluble powder according to claim 1, characterized in that, The driving mechanism includes a drive motor (8), which is fixed to one side of the connecting cylinder (4) by a stabilizing block. The output end of the drive motor (8) is connected to a drive gear (9), and a driven gear (10) is meshed on one side of the drive gear (9). The inner wall of the driven gear (10) is connected to the upper part of the outer wall of the rotating tube (7). An opening is provided on one side of the connecting cylinder (4) corresponding to the drive gear (9), and one side of the drive gear (9) is located inside the opening.

4. The system for preparing ultrafine particles of sparingly soluble powder according to claim 1, characterized in that, The gas injection mechanism includes a gas supply pipe (11), one end of which is connected to one end of the gas inlet pipe (5). One side of the gas supply pipe (11) is installed on the upper side of the preparation cylinder (2) by a fixing block. One end of the gas supply pipe (11) is connected to an insertion tube (12). One end of the insertion tube (12) is inserted into the feed pipe (3). One side of the outer wall of the insertion tube (12) is circumferentially connected to a pulse nozzle (13). The pulse nozzle (13) is set in an inclined shape.

5. The system for preparing ultrafine particles of sparingly soluble powder according to claim 1, characterized in that, The air distribution mechanism includes a connecting pipe (16), the upper end of which is connected to the lower end of the air inlet pipe (5), an air distribution valve is connected to the upper part of the outer wall of the connecting pipe (16), and an air distribution pipe (17) is connected to the lower end of the connecting pipe (16). The air distribution pipe (17) is C-shaped. The upper end of the mounting block (18) is connected to the upper end of the inner wall of the preparation cylinder (2). The upper end of the air inlet pipe (19) passes through the mounting block (18) and the preparation cylinder (2) in sequence and extends to the upper end of the preparation cylinder (2). The upper ends of the two air inlet pipes (19) extend through the air distribution pipe (17). An air inlet valve is connected to the outer wall of both air inlet pipes (19). The two air blowing nozzles (20) are symmetrically arranged.

6. The system for preparing ultrafine particles of sparingly soluble powder according to claim 1, characterized in that, The cross-sectional shape of the slide rod (21) is semi-arc. The slide plate (22) has through holes at the two slide rods (21). The two slide rods (21) are located inside the two through holes respectively. The two sides of the slide plate (22) are connected to the two slide rods (21). Two of the compression springs (23) and two other compression springs (23) are respectively sleeved on the outer wall of the two slide rods (21). One end of the four compression springs (23) is connected to the lower end of the mounting block (18). The lower end of the slide plate (22) is arc-shaped. The shape of the lower end of the slide plate (22) is adapted to the shape of the inner wall of the receiving ring (15). The disturbance brush (24) is in contact with the lower end of the inner wall of the receiving ring (15). The disturbance brush (24) is made of flexible material.

7. The system for preparing ultrafine particles of sparingly soluble powder according to claim 1, characterized in that, The material spreading mechanism includes a material spreading plate (31), and there are ten material spreading plates (31). All ten material spreading plates (31) are circumferentially installed on the outer wall of the rotating tube (7). The material spreading plates (31) are fan-shaped. A micro jet nozzle (32) is connected to one side of the outer wall of the rotating tube (7) corresponding to the multiple material spreading plates (31).

8. The system for preparing ultrafine particles of sparingly soluble powder according to claim 1, characterized in that, The receiving ring (15) is provided with a discharge port at the lower end. The inner walls of the four discharge ports are embedded with screens (28). The receiving ring (15) is connected to a connecting hopper (29) at the lower end corresponding to the multiple screens (28). The lower ends of the multiple connecting hoppers (29) are connected to guide pipes (30). The multiple guide pipes (30) are located above the spreading mechanism.

9. The system for preparing ultrafine particles of sparingly soluble powder according to claim 1, characterized in that, The stirring mechanism includes a rotating shaft (33), the upper end of which is connected to the lower end of the rotating tube (7), and stirring plates (34) are circumferentially connected to the lower part of the outer wall of the rotating shaft (33).

10. The system for preparing ultrafine particles of sparingly soluble powder according to claim 1, characterized in that, The disturbance system includes a main control module, a pressure sensor, an external air intake device, an air path valve, an airflow disturbance module, and an air blowing and spreading module; the pressure sensor is installed in the air intake pipe (5) to detect the airflow pressure in real time; the external air intake device is installed at the inlet of the air intake pipe (5) to supply compressed air to the system; the air path valve is installed between the external air intake device and the air injection mechanism and the air distribution mechanism to adjust the gas flow and on / off of each branch.

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