A pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization

Abstract

A pulverizing unit based on multi-stage cyclone impact and shear composite pulverization, relating to the field of airflow pulverizing equipment technology, includes a mounting base on which a multi-stage pulverizing unit, a shear impact composite unit, a material feeding unit, and a grading output unit are respectively mounted. The multi-stage pulverizing unit includes a pulverizing cylinder with an open upper end, the lower end of which is fixed to the upper surface of the mounting base by bolts. The inner circumferential wall of the pulverizing cylinder is provided with, from top to bottom, a primary coarse crushing ring seat, a secondary medium crushing ring seat, and a tertiary fine crushing ring seat with progressively decreasing inner diameters. Rotary opening and closing mechanisms are provided between the primary coarse crushing ring seat and the secondary medium crushing ring seat, and between the secondary medium crushing ring seat and the tertiary fine crushing ring seat. This invention solves the problems of poor versatility, low pulverizing efficiency, high energy consumption, uneven particle size, insufficient continuous controllability, low grading and collection accuracy, poor control coordination, and difficulty in ensuring cleanliness in existing pharmaceutical pulverizing equipment.

Description

Technical Field

[0001] This invention relates to the field of airflow pulverizing equipment technology, specifically to a pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization. Background Technology

[0002] In the pharmaceutical industry's material pulverization production sector, the performance of pulverization equipment directly determines the particle size quality of drug raw materials, production efficiency, and drug safety. Furthermore, pharmaceutical production demands far higher precision, stability, and cleanliness in material pulverization than ordinary industrial production. Currently, existing pharmaceutical pulverization technologies and equipment still face numerous bottlenecks in practical applications, severely hindering the efficient and compliant development of the pharmaceutical industry.

[0003] On the one hand, in pharmaceutical production, different dosage forms (such as tablets, capsules, powders, and sterile powders for injection) have significantly different requirements for the particle size of drug raw materials. The uniformity and precision of particle size directly affect the dissolution rate, bioavailability, and clinical efficacy of the drug. However, most existing pharmaceutical grinding equipment is designed for single particle size adaptation, with extremely poor versatility. Changing the particle size of a product requires replacing the entire grinding equipment, which not only significantly increases the equipment investment costs for pharmaceutical companies but also prolongs the production preparation time. Frequent equipment switching may also introduce the risk of cross-contamination, greatly reducing production flexibility and compliance.

[0004] On the other hand, traditional pharmaceutical pulverization methods mostly rely on single mechanical shearing or airflow impact, which has limited ability to damage the internal structure of drug raw materials, resulting in low pulverization efficiency. The material throughput per unit time is insufficient to meet the needs of large-scale pharmaceutical production. At the same time, in single pulverization mode, drug materials are prone to agglomeration, increasing the frictional resistance between particles. This not only increases energy consumption but may also damage the active ingredients of the drug due to local frictional heat, affecting drug stability. Some pharmaceutical equipment that uses airflow-assisted pulverization cannot achieve gradient crushing of drug materials due to unreasonable distribution of airflow intensity. This often results in insufficient crushing of coarse particles and over-crushing of fine particles, leading to poor particle size uniformity in the product, which directly affects the stability of subsequent formulation processes and the clinical efficacy of the drug.

[0005] Regarding the continuity and controllability of multi-stage pulverization processes in pharmaceutical manufacturing, existing equipment suffers from rudimentary material channel control mechanisms. These mechanisms cannot flexibly adjust channel opening and closing based on the real-time pulverization status of the drug materials, requiring frequent manual intervention to interrupt production. This hinders continuous pulverization, results in low automation, reduces production efficiency, and increases the risk of contamination from contact with the external environment, failing to meet the clean production requirements of Good Manufacturing Practices (GMP). Furthermore, the existing equipment's grading, screening, and collection systems lack precision, failing to accurately separate drug materials of different particle sizes. This leads to mixing of particles of varying sizes, affecting drug purity and quality stability. Simultaneously, drug dust leakage during collection is a significant issue, polluting the clean production workshop environment, violating GMP regulations, and potentially posing occupational health risks to operators due to dust inhalation. Moreover, the conveying efficiency of traditional collection methods is ill-suited to the pace required for pharmaceutical pulverization.

[0006] At the equipment control level, most functional components of existing pharmaceutical pulverizing equipment are controlled in a decentralized manner, requiring parameter adjustments to be performed one by one, which is cumbersome and lacks coordination. Due to the significant differences in the characteristics of different drug materials (hardness, humidity, viscosity, heat sensitivity, etc.), the decentralized control mode makes it difficult to achieve precise matching and coordinated optimization of key parameters. This not only leads to unstable pulverization results and large fluctuations in drug quality, making it impossible to guarantee the consistency of batch production, but also makes it difficult to meet the GMP management requirements for traceable and verifiable parameters in the drug production process.

[0007] In summary, existing pharmaceutical pulverizing equipment suffers from numerous technical problems, including poor versatility, low pulverizing efficiency, high energy consumption, poor particle size uniformity, insufficient continuous controllability, low accuracy of graded collection, poor control coordination, and difficulty in ensuring cleanliness. These problems seriously affect pharmaceutical production efficiency, drug quality stability, and production compliance. There is an urgent need to develop a new type of pulverizing equipment that can adapt to the specific needs of the pharmaceutical industry and solve the above-mentioned problems. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization, which solves the problems of poor versatility, low pulverization efficiency and high energy consumption, uneven particle size, insufficient continuous controllability, low graded collection accuracy, poor control coordination and difficulty in ensuring cleanliness in existing pharmaceutical pulverizing equipment.

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization includes a mounting base, on which a multi-stage pulverizing unit, a shearing impact composite unit, a material feeding unit, and a graded output unit are respectively provided.

[0011] As an optimized solution, the multi-stage crushing unit includes a crushing column with an open top, the lower end of which is fixed to the upper surface of the mounting base by bolts.

[0012] As an optimized solution, the inner circumferential wall of the crushing column is provided with a first-stage coarse crushing ring seat, a second-stage medium crushing ring seat, and a third-stage fine crushing ring seat with progressively decreasing inner diameters from top to bottom. Rotational opening and closing mechanisms are provided between the first-stage coarse crushing ring seat and the second-stage medium crushing ring seat, and between the second-stage medium crushing ring seat and the third-stage fine crushing ring seat.

[0013] As an optimized solution, the inner bottom surface of the crushing column is provided with a rotating inner cylinder with an upper opening at the center, and the three-stage fine crushing ring seat is provided with a fine crushing rotating impeller, which is fixed on the outer peripheral wall of the rotating inner cylinder.

[0014] As an optimized solution, a rotating middle cylinder is rotatably sleeved on the outer side of the rotating inner cylinder, and a middle crushing rotating impeller is provided in the secondary middle crushing ring seat. The middle crushing rotating impeller is divided into two symmetrical groups, and each group of the middle crushing rotating impeller includes several centrally symmetrical middle crushing blades. The ends of the middle crushing blades are welded to the outer peripheral wall of the rotating middle cylinder.

[0015] As an optimized solution, a rotating outer cylinder is rotatably sleeved on the outer side of the rotating middle cylinder, and a coarse crushing rotating impeller is provided inside the primary coarse crushing ring seat. The coarse crushing rotating impeller is divided into two symmetrical groups, and each group of the coarse crushing rotating impeller includes several centrally symmetrical coarse crushing blades. The ends of the coarse crushing blades are welded to the outer peripheral wall of the rotating outer cylinder.

[0016] As an optimized solution, the mounting base is a horizontally grounded square base, and an integrated electrical control box is fixed to one side of the upper surface of the mounting base. The integrated electrical control box is connected to an external control panel.

[0017] As an optimized solution, an upper partition plate is welded to the inner peripheral wall of the crushing column near the upper opening. An upper clamping port is provided in the middle of the upper partition plate, and a first retaining ring is rotatably clamped in the upper clamping port. The inner ring of the first retaining ring is fixed to the outer peripheral wall of the rotating inner cylinder.

[0018] As an optimized solution, a first driven gear is provided above the first retaining ring, and the first driven gear is also fixed on the outer peripheral wall of the rotating inner cylinder. A first communication port is provided on the side wall of the crushing column corresponding to the first driven gear.

[0019] As an optimized solution, a first transmission box is provided on the outside of the first communication port. The first transmission box is welded to the outer wall of the crushing column. A first transmission motor is fixed on the upper surface of the first transmission box. The output shaft end of the first transmission motor passes downward through the first transmission box and is fixed with a first driving gear. A first transmission belt is sleeved between the first driving gear and the first driven gear. The middle section of the first transmission belt passes through the first communication port and extends into the crushing column.

[0020] As an optimized solution, the lower end of the rotating cylinder is flush with the lower end face of the secondary crushing ring seat, and the upper end of the rotating cylinder extends to the bottom of the upper partition plate.

[0021] As an optimized solution, a middle partition is provided below the upper partition. The middle partition is welded to the inner circumferential wall of the crushing column. A middle mounting port is provided in the middle of the middle partition. A second retaining ring is rotatably mounted in the middle mounting port. The inner ring of the second retaining ring is fixed to the outer circumferential wall of the rotating middle cylinder.

[0022] As an optimized solution, a second driven gear is provided above the second retaining ring, and the second driven gear is also fixed on the outer peripheral wall of the rotating cylinder. A second communication port is provided on the side wall of the crushing column corresponding to the second driven gear.

[0023] As an optimized solution, a second transmission box is provided on the outside of the second communication port. The second transmission box is welded to the outer wall of the crushing column. A second transmission motor is fixed on the upper surface of the second transmission box. The output shaft end of the second transmission motor passes downward through the second transmission box and is fixed with a second driving gear. A second transmission belt is sleeved between the second driving gear and the second driven gear. The middle section of the second transmission belt passes through the second communication port and extends into the crushing column.

[0024] As an optimized solution, the lower end of the rotating outer cylinder is flush with the lower end face of the primary coarse crushing ring seat, and the upper end of the rotating outer cylinder extends to the bottom of the middle layer partition.

[0025] As an optimized solution, a lower partition is provided below the middle partition. The lower partition is welded to the inner circumferential wall of the crushing column. A lower mounting port is provided in the middle of the lower partition. A third retaining ring is rotatably mounted in the lower mounting port. The inner ring of the third retaining ring is fixed to the outer circumferential wall of the rotating outer cylinder.

[0026] As an optimized solution, a third driven gear is provided above the third retaining ring, and the third driven gear is also fixed on the outer peripheral wall of the rotating outer cylinder. A third connecting port is provided on the side wall of the crushing column corresponding to the third driven gear.

[0027] As an optimized solution, a third transmission box is provided on the outside of the third connecting port. The third transmission box is welded to the outer wall of the crushing column. A third transmission motor is fixed on the upper surface of the third transmission box. The output shaft end of the third transmission motor passes downward through the third transmission box and is fixed with a third driving gear. A third transmission belt is sleeved between the third driving gear and the third driven gear. The middle section of the third transmission belt passes through the third connecting port and extends into the crushing column.

[0028] As an optimized solution, a detachable upper cover is installed at the upper opening of the crushing column. The shearing impact composite unit includes an air compressor, which is fixed in the middle of the upper surface of the upper cover. The lower end of the air compressor is connected to an air supply pipe, which passes through the upper cover and extends into the crushing column.

[0029] As an optimized solution, the lower end of the air supply pipe is rotatably sleeved on the outer peripheral wall of the rotating inner cylinder, and a sealing ring is fitted between the air supply pipe and the rotating inner cylinder.

[0030] As an optimized solution, the outer peripheral wall of the rotating inner cylinder is provided with several sets of impact air outlets corresponding to the first-stage coarse crushing ring seat, the second-stage medium crushing ring seat, and the third-stage fine crushing ring seat, respectively. The outer peripheral wall of the rotating middle cylinder is also provided with several sets of impact air outlets corresponding to the first-stage coarse crushing ring seat and the second-stage medium crushing ring seat, respectively. The outer peripheral wall of the rotating outer cylinder is also provided with several sets of impact air outlets corresponding to the first-stage coarse crushing ring seat.

[0031] As an optimized solution, the shear-impact composite unit further includes a primary shear blade and a secondary shear blade, each having several blades.

[0032] As an optimized solution, several primary shearing blades are symmetrically arranged between the upper and lower sets of coarse crushing rotating impellers, and the end of each primary shearing blade is welded to the outer peripheral wall of the rotating outer cylinder.

[0033] As an optimized solution, several secondary shear blades are symmetrically arranged between the upper and lower sets of intermediate crushing rotating impellers, and the end of each secondary shear blade is welded to the outer peripheral wall of the rotating cylinder.

[0034] As an optimized solution, one set of the rotating opening and closing mechanism includes several rotationally symmetrical triangular rotating plates. One corner of each triangular rotating plate is hinged between the lower surface of the primary coarse crushing ring seat and the upper surface of the secondary intermediate crushing ring seat. An annular drive ring is rotatably provided on the outer side of each of the triangular rotating plates. Several hinge seats are fixed on the inner circumferential wall of the annular drive ring corresponding to each of the triangular rotating plates. A linkage arm is hinged to each hinge seat. The end of the linkage arm is hinged to another triangle of the triangular rotating plate.

[0035] As an optimized solution, a toggle connection port is provided on the outer peripheral wall of the crushing column corresponding to the annular drive ring, and a drive lever is fixed on the outer peripheral wall of the annular drive ring opposite the toggle connection port. The end of the drive lever passes through the toggle connection port and extends to its outer side.

[0036] As an optimized solution, the aforementioned rotating opening and closing mechanism is also provided between the secondary intermediate crushing ring seat and the tertiary fine crushing ring seat.

[0037] As an optimized solution, the material feeding unit includes a feeding support plate, which is an inverted L-shaped plate. The lower end of the vertical portion of the feeding support plate is welded to the upper surface of the mounting base, and the lower end of the horizontal portion of the feeding support plate is welded to the outer peripheral wall of the crushing column.

[0038] As an optimized solution, a laterally extending feed pipe is fixed to the upper surface of the feed support plate. One end of the feed pipe is fixedly connected to the crushing column, and the other end of the feed pipe is fixed with a side end cover. A conveying drive motor is fixed on the side end cover. The output shaft end of the conveying drive motor passes through the side end cover and is fixed with a spiral auger. The end of the spiral auger extends into the crushing column. A guide pipe is provided on the outside of the spiral auger, and the end of the guide pipe extends above the inner ring of the primary coarse crushing ring seat.

[0039] As an optimized solution, the upper end of the feed pipe is fixed with a feeding hopper that communicates with it, and the upper end of the feeding hopper is provided with two closed end caps on both sides.

[0040] As an optimized solution, the graded output unit includes a coarse material output pipe, a medium material output pipe, and a fine material output pipe. Pneumatic conveyors are fixed on the upper surfaces of the coarse material output pipe, the medium material output pipe, and the fine material output pipe, respectively, near their ends. Discharge inclined pipes are fixed at the lower ends of the coarse material output pipe, the medium material output pipe, and the fine material output pipe, respectively.

[0041] As an optimized solution, the coarse material output pipe is positioned directly opposite the primary coarse crushing ring seat. The end of the coarse material output pipe is welded to and connected to the outer peripheral wall of the crushing column. A coarse material diversion port is provided inside the primary coarse crushing ring seat, and the coarse material diversion port is connected to the coarse material output pipe. A coarse material partition is fixed inside the coarse material diversion port.

[0042] As an optimized solution, the intermediate material output pipe is positioned directly opposite the secondary intermediate crushing ring seat. The end of the intermediate material output pipe is welded to and connected to the outer peripheral wall of the crushing column. An intermediate material diversion port is provided inside the secondary intermediate crushing ring seat, and the intermediate material diversion port is connected to the intermediate material output pipe. An intermediate material partition is fixed inside the intermediate material diversion port.

[0043] As an optimized solution, the fine material output pipe is positioned directly opposite the three-stage fine crushing ring seat. The end of the fine material output pipe is welded to and connected to the outer peripheral wall of the crushing column. A fine material diversion port is provided inside the three-stage fine crushing ring seat, and the fine material diversion port is connected to the fine material output pipe. A fine material partition is fixed inside the fine material diversion port.

[0044] Compared with the prior art, the beneficial effects of the present invention are:

[0045] 1. Multi-stage grinding enables precise particle size control.

[0046] This invention, by setting up a three-stage, progressively decreasing series of crushing rings—a primary coarse crushing ring, a secondary medium crushing ring, and a tertiary fine crushing ring—along with corresponding coarse, medium, and fine crushing impellers, can flexibly produce coarse, medium, or fine-grained drug particles according to pharmaceutical needs (such as the particle size requirements of different dosage forms like tablets, capsules, and injections). No equipment changes are required; particle size can be adjusted simply by operating the opening and closing mechanism, greatly improving the flexibility and versatility of particle size control in the pharmaceutical process and meeting the needs of different drug formulations.

[0047] 2. The combined effect of shearing and cyclone impact improves pulverization efficiency.

[0048] In this invention, primary and secondary shearing blades are respectively installed within the coarse and secondary crushing rings to achieve mechanical shearing. Simultaneously, compressed air generated by an air compressor is ejected through multiple impact outlets on the rotating inner, middle, and outer cylinders, forming a rotating impact airflow. By combining the principles of mechanical shearing and airflow impact, a "shearing + impact" composite pulverization mode is formed. This composite action can more efficiently destroy the internal structure of drug particles, shorten pulverization time, and increase the amount of drug processed per unit time. At the same time, the high-speed rotating airflow can disperse drug particles, reduce inter-particle frictional resistance, and lower energy consumption. This is particularly suitable for processing pharmaceutical raw materials with high viscosity or hardness (such as traditional Chinese medicine extracts and vitamins), ensuring the high efficiency and economy of the pulverization process.

[0049] 3. The intensity of the cyclone increases gradually, achieving gradient pulverization.

[0050] In this invention, compressed air generated by an air compressor is vertically conveyed along a rotating inner cylinder and sequentially discharged through various impact outlets. As the airflow rotates and discharges from top to bottom, the number of impact outlets it passes through decreases progressively. This design ensures that the intensity of the resulting impact cyclones also increases progressively from top to bottom. During the material's descent, it first encounters a lower-intensity cyclone, then a higher-intensity cyclone, and finally the strongest cyclone. This top-to-bottom increasing cyclone intensity design ensures that the drug particles experience a gradient impact from weak to strong during their descent, guaranteeing that the particles are gradually and thoroughly broken down from coarse to fine. This characteristic helps ensure the uniformity and consistency of the final drug particle size, reducing drug stability issues caused by particle size inconsistencies (such as differences in dissolution and shortened shelf life), and improving the stability of drug quality.

[0051] 4. The rotating opening and closing mechanism enables continuous and controllable material flow.

[0052] This invention features a rotating opening and closing mechanism between adjacent grinding rings, consisting of a triangular rotating plate and an annular drive ring. By actuating the drive lever on the annular drive ring, the triangular rotating plate can be rotated, thereby opening or closing the channels between the grinding rings. This mechanism allows for flexible control of drug flow at different grinding stages. For example, if the drug has reached the required particle size (e.g., coarse particles), it can be directly discharged; if further grinding is required, the channel is opened to allow entry into the next stage. This achieves a continuous and controllable multi-stage grinding process, reducing manual intervention, improving the automation and production efficiency of pharmaceutical production lines, and minimizing material waste.

[0053] 5. The hierarchical output unit enables precise screening and efficient collection.

[0054] This invention features corresponding coarse, medium, and fine material distribution ports below the inner ring of each crushing ring, with corresponding aperture meshes fixed inside each distribution port. A pneumatic conveyor is connected to the outside of each distribution port. This design allows for precise grading and screening based on drug particle size: drugs meeting the particle size requirements enter the pneumatic conveyor through the corresponding distribution port, achieving negative pressure collection and conveying. This not only ensures drug purity (avoiding impurities) but also effectively controls dust through pneumatic conveying, improving the working environment of the pharmaceutical workshop and meeting the requirements of Good Manufacturing Practices (GMP).

[0055] 6. Integrated electrical control box enables automated control and parameter optimization.

[0056] All drive motors, air compressors, and conveyor drive motors are uniformly controlled by an integrated electrical control box. Operators can preset and adjust the speed of each motor, airflow, and the timing of opening and closing mechanisms according to the characteristics of pharmaceutical raw materials (such as hardness, humidity, and viscosity). Through precise parameter settings, optimal pulverization effect and equipment operating status can be achieved, further improving the efficiency of pharmaceutical production and the stability of product quality, and reducing the risk of drug quality fluctuations caused by improper parameters. Attached Figure Description

[0057] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0058] Figure 1 This is a schematic diagram of the overall external structure of the present invention in the main viewing direction;

[0059] Figure 2 This is a schematic diagram of the overall external structure of the present invention from a top-down perspective;

[0060] Figure 3 This is a schematic diagram of the overall external structure of the present invention from the left-side view direction;

[0061] Figure 4 This is a schematic diagram of the overall external structure of the present invention from the right-side view direction;

[0062] Figure 5 This is an isometric schematic diagram of the three-dimensional structure of the present invention;

[0063] Figure 6 For the present invention along Figure 2 A schematic diagram of the internal structure cut along line AA in the middle;

[0064] Figure 7 For the present invention along Figure 1A schematic diagram of the internal structure cut along the middle BB line;

[0065] Figure 8 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the CC line;

[0066] Figure 9 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the DD line in the middle;

[0067] Figure 10 For the present invention along Figure 3 A half-section diagram of the three-dimensional structure cut along the EE line;

[0068] Figure 11 For the present invention along Figure 1 A schematic diagram of the internal structure cut along the FF line.

[0069] In the diagram: 1-Mounting base, 2-Integrated electrical control box, 3-Control panel, 4-Crushing cylinder, 5-First-stage coarse crushing ring seat, 6-Second-stage medium crushing ring seat, 7-Third-stage fine crushing ring seat, 8-Rotating inner cylinder, 9-Fine crushing rotating impeller, 10-Upper partition plate, 11-First retaining ring, 12-First driven gear, 13-First connecting port, 14-First transmission box, 15-First transmission motor, 16-First driving gear, 17-First transmission belt, 18-Rotating middle cylinder, 19-Middle partition plate, 20-Second retaining ring, 21-Second driven gear, 22-Second connecting port, 23-Second transmission box, 24-Second transmission motor, 25-Second driving gear, 26-Second transmission belt, 27-Medium crushing blade, 28-Rotating outer cylinder, 29-Lower partition plate, 30-Third retaining ring, 31-Third driven gear, 32-Third connecting port, 33-Third transmission box, 34-Third transmission belt 35-Third drive gear, 36-Third transmission belt, 37-Coarse crushing blades, 38-Upper end cover, 39-Air compressor, 40-Air supply pipe, 41-Sealing ring, 42-Impact air outlet, 43-Primary shearing blade, 44-Secondary shearing blade, 45-Triangular rotating plate, 46-Annular drive ring, 47-Hinge seat, 48-Linkage bending arm, 49-Pulling connection port, 50-Drive lever, 51-Feed support plate, 5 2-Feed pipe, 53-Side end cover, 54-Conveyor drive motor, 55-Screw auger, 56-Guide pipe, 57-Feeding hopper, 58-Closed end cover, 59-Coarse material output pipe, 60-Medium material output pipe, 61-Fine material output pipe, 62-Pneumatic conveyor, 63-Discharge inclined pipe, 64-Coarse material diversion port, 65-Coarse material separator, 66-Medium material diversion port, 67-Medium material separator, 68-Fine material diversion port, 69-Fine material separator. Detailed Implementation

[0070] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0071] like Figures 1 to 11 As shown, a pulverizer unit based on multi-stage cyclone impact and shearing composite pulverization includes a mounting base 1, on which a multi-stage pulverizing unit, a shearing impact composite unit, a material feeding unit, and a graded output unit are respectively provided.

[0072] Mounting base 1 is a horizontally grounded square base. An integrated electrical control box 2 is fixed to one side of the upper surface of mounting base 1. The integrated electrical control box 2 is connected to an external control panel 3.

[0073] The multi-stage crushing unit includes a crushing column 4 with an open top. The crushing column 4 is located on the horizontal side of the integrated electrical control box 2 and its lower end is fixed to the upper surface of the mounting base 1 by bolts.

[0074] The crushing column 4 is provided with a first-stage coarse crushing ring seat 5, a second-stage medium crushing ring seat 6, and a third-stage fine crushing ring seat 7 with progressively decreasing inner diameters from top to bottom. The first-stage coarse crushing ring seat 5, the second-stage medium crushing ring seat 6, and the third-stage fine crushing ring seat 7 are all fixed on the inner circumferential wall of the crushing column 4. The third-stage fine crushing ring seat 7 is set close to the inner bottom surface of the crushing column 4. There are equally spaced installation gaps between the first-stage coarse crushing ring seat 5 and the second-stage medium crushing ring seat 6, and between the second-stage medium crushing ring seat 6 and the third-stage fine crushing ring seat 7.

[0075] A rotating inner cylinder 8 is rotatably provided at the center of the inner bottom surface of the crushing column 4. The upper end of the rotating inner cylinder 8 is open and extends to the upper end opening of the crushing column 4. A fine crushing rotating impeller 9 is provided in the three-stage fine crushing ring seat 7 and is fixed on the outer peripheral wall of the rotating inner cylinder 8.

[0076] An upper partition plate 10 is welded to the inner peripheral wall of the crushing column 4 near the upper opening. An upper clamping port is provided in the middle of the upper partition plate 10. A first retaining ring 11 is rotatably clamped in the upper clamping port. The inner ring of the first retaining ring 11 is fixed to the outer peripheral wall of the rotating inner cylinder 8.

[0077] A first driven gear 12 is provided above the first retaining ring 11. The first driven gear 12 is also fixed on the outer peripheral wall of the rotating inner cylinder 8. A first connecting port 13 is provided on the side wall of the crushing column cylinder 4 corresponding to the first driven gear 12.

[0078] A first transmission box 14 is provided on the outside of the first connecting port 13. The first transmission box 14 is welded to the outer wall of the crushing column 4. A first transmission motor 15 is fixed on the upper surface of the first transmission box 14. The output shaft end of the first transmission motor 15 passes downward through the first transmission box 14 and is fixed with a first driving gear 16. A first transmission belt 17 is sleeved between the first driving gear 16 and the first driven gear 12. The middle section of the first transmission belt 17 passes through the first connecting port 13 and extends into the crushing column 4.

[0079] A rotating middle cylinder 18 is rotatably sleeved on the outer side of the rotating inner cylinder 8. The lower end of the rotating middle cylinder 18 is flush with the lower end face of the secondary intermediate crushing ring seat 6, and the upper end of the rotating middle cylinder 18 extends to the lower part of the upper partition plate 10.

[0080] Below the upper partition 10, there is a middle partition 19. The middle partition 19 is welded to the inner circumferential wall of the crushing column cylinder 4. A middle clamping port is opened in the middle of the middle partition 19. A second clamping ring 20 is rotatably clamped in the middle clamping port. The inner ring of the second clamping ring 20 is fixed to the outer circumferential wall of the rotating middle cylinder 18.

[0081] A second driven gear 21 is provided above the second retaining ring 20. The second driven gear 21 is also fixed on the outer peripheral wall of the rotating cylinder 18. A second connecting port 22 is provided on the side wall of the crushing cylinder 4 corresponding to the second driven gear 21.

[0082] A second transmission box 23 is provided on the outside of the second connecting port 22. The second transmission box 23 is welded to the outer wall of the crushing column 4. A second transmission motor 24 is fixed on the upper surface of the second transmission box 23. The output shaft end of the second transmission motor 24 passes downward through the second transmission box 23 and is fixed with a second driving gear 25. A second transmission belt 26 is sleeved between the second driving gear 25 and the second driven gear 21. The middle section of the second transmission belt 26 passes through the second connecting port 22 and extends into the crushing column 4.

[0083] The secondary intermediate crushing ring seat 6 is equipped with an intermediate crushing rotating impeller, which is divided into two symmetrical groups. Each group of intermediate crushing rotating impellers includes several centrally symmetrical intermediate crushing blades 27. The ends of the intermediate crushing blades 27 are welded to the outer peripheral wall of the rotating cylinder 18.

[0084] A rotating outer cylinder 28 is rotatably sleeved on the outer side of the rotating middle cylinder 18. The lower end of the rotating outer cylinder 28 is flush with the lower end face of the first-stage coarse crushing ring seat 5, and the upper end of the rotating outer cylinder 28 extends to the lower part of the middle layer partition 19.

[0085] Below the middle partition 19, there is a lower partition 29. The lower partition 29 is welded to the inner circumferential wall of the crushing column cylinder 4. A lower clamping port is opened in the middle of the lower partition 29. A third clamping ring 30 is rotatably clamped in the lower clamping port. The inner ring of the third clamping ring 30 is fixed to the outer circumferential wall of the rotating outer cylinder 28.

[0086] A third driven gear 31 is provided above the third retaining ring 30. The third driven gear 31 is also fixed on the outer peripheral wall of the rotating outer cylinder 28. A third connecting port 32 is provided on the side wall of the crushing column cylinder 4 corresponding to the third driven gear 31.

[0087] A third transmission box 33 is provided on the outside of the third connecting port 32. The third transmission box 33 is welded to the outer wall of the crushing column 4. A third transmission motor 34 is fixed on the upper surface of the third transmission box 33. The output shaft end of the third transmission motor 34 passes downward through the third transmission box 33 and is fixed with a third driving gear 35. A third transmission belt 36 is sleeved between the third driving gear 35 and the third driven gear 31. The middle section of the third transmission belt 36 passes through the third connecting port 32 and extends into the crushing column 4.

[0088] The primary coarse crushing ring seat 5 is equipped with a coarse crushing rotating impeller, which is divided into two symmetrical groups. Each group of coarse crushing rotating impellers includes several centrally symmetrical coarse crushing blades 37. The ends of the coarse crushing blades 37 are welded to the outer peripheral wall of the rotating outer cylinder 28.

[0089] A removable upper cover 38 is installed at the upper opening of the crushing column 4. The shearing impact composite unit includes an air compressor 39, which is fixed in the middle of the upper surface of the upper cover 38. The lower end of the air compressor 39 is connected to an air supply pipe 40, which passes through the upper cover 38 and extends into the crushing column 4.

[0090] The lower end of the air supply pipe 40 is rotatably sleeved on the outer peripheral wall of the rotating inner cylinder 8, and a sealing ring 41 is fitted between the air supply pipe 40 and the rotating inner cylinder 8.

[0091] Several sets of impact air outlets 42 are respectively opened on the outer peripheral wall of the rotating inner cylinder 8 corresponding to the primary coarse crushing ring seat 5, the secondary medium crushing ring seat 6, and the tertiary fine crushing ring seat 7. Several sets of impact air outlets 42 are also respectively opened on the outer peripheral wall of the rotating middle cylinder 18 corresponding to the primary coarse crushing ring seat 5 and the secondary medium crushing ring seat 6. Several sets of impact air outlets 42 are also respectively opened on the outer peripheral wall of the rotating outer cylinder 28 corresponding to the primary coarse crushing ring seat 5. The compressed air generated by the air compressor 39 and supplied through the air supply pipe 40 runs vertically along the rotating inner cylinder 8. The air is conveyed and discharged sequentially through each impact outlet 42, forming an impact cyclone as it rotates with the inner cylinder 8, the middle cylinder 18, or the outer cylinder 28. As the airflow is conveyed vertically along the inner cylinder 8, the number of impact outlets 42 that the airflow needs to pass through when discharged from top to bottom decreases progressively (the upper layer needs to pass through 3 layers, the middle layer needs to pass through 2 layers, and the lower layer only needs to pass through 1 layer). The airflow resistance decreases progressively, so the intensity of the impact cyclone increases progressively from top to bottom.

[0092] The shearing impact composite unit also includes a primary shearing blade 43 and a secondary shearing blade 44, each equipped with several blades.

[0093] Several primary shearing blades 43 are centrally symmetrically arranged between the upper and lower sets of coarse crushing rotating impellers and rotate synchronously with the coarse crushing rotating impellers. The end of each primary shearing blade 43 is welded to the outer peripheral wall of the rotating outer cylinder 28.

[0094] Several secondary shear blades 44 are centrally symmetrically arranged between the upper and lower sets of intermediate crushing rotating impellers and rotate synchronously with the intermediate crushing rotating impellers. The end of each secondary shear blade 44 is welded to the outer peripheral wall of the rotating cylinder 18.

[0095] A rotating opening and closing mechanism is provided between the primary coarse crushing ring seat 5 and the secondary intermediate crushing ring seat 6. The rotating opening and closing mechanism includes several rotationally symmetrical triangular rotating plates 45. One corner of the triangular rotating plate 45 is hinged and installed in the installation gap between the lower surface of the primary coarse crushing ring seat 5 and the upper surface of the secondary intermediate crushing ring seat 6. A ring drive ring 46 is rotatably provided on the outer side of the several triangular rotating plates 45. Several hinge seats 47 are fixed on the inner circumferential wall of the ring drive ring 46 corresponding to the several triangular rotating plates 45. A linkage bent arm 48 is hinged on each hinge seat 47. The end of the linkage bent arm 48 is hinged and installed at another triangle of the triangular rotating plate 45.

[0096] A toggle connection port 49 is provided on the outer peripheral wall of the crushing column 4 corresponding to the annular drive ring 46. A drive paddle 50 is fixed on the outer peripheral wall of the annular drive ring 46 opposite to the toggle connection port 49. The end of the drive paddle 50 passes through the toggle connection port 49 and extends to its outer side. The drive paddle 50 can be manually toggle or electrically driven to drive the annular drive ring 46 to rotate, thereby controlling the triangular rotating plate 45 to be fully opened or closed.

[0097] The aforementioned rotating opening and closing mechanism is also provided in the installation gap between the secondary intermediate crushing ring seat 6 and the tertiary fine crushing ring seat 7.

[0098] The material feeding unit includes a feeding support plate 51, which is an inverted L-shaped plate. The lower end of the vertical part of the feeding support plate 51 is welded to the upper surface of the mounting base 1, and the lower end of the horizontal part of the feeding support plate 51 is welded to the outer peripheral wall of the crushing column cylinder 4.

[0099] A transversely extending feed pipe 52 is fixed on the upper surface of the feed support plate 51. One end of the feed pipe 52 is fixedly connected to the crushing column 4, and the other end of the feed pipe 52 is fixed with a side end cover 53. A conveying drive motor 54 is fixed on the side end cover 53. The output shaft end of the conveying drive motor 54 passes through the side end cover 53 and is fixed with a spiral auger 55. The end of the spiral auger 55 extends into the crushing column 4. A guide pipe 56 is provided on the outside of the spiral auger 55. The end of the guide pipe 56 extends to the inner ring above the primary coarse crushing ring seat 5.

[0100] The upper end of the feed pipe 52 is fixed with a feeding hopper 57 connected to it, and the upper end of the feeding hopper 57 is provided with two closed end caps 58 on both sides.

[0101] The graded output unit includes a coarse material output pipe 59, a medium material output pipe 60, and a fine material output pipe 61. Pneumatic conveyors 62 are fixed on the upper surfaces of the coarse material output pipe 59, the medium material output pipe 60, and the fine material output pipe 61 near their ends, and discharge inclined pipes 63 are fixed on the lower ends of the coarse material output pipe 59, the medium material output pipe 60, and the fine material output pipe 61, respectively.

[0102] The coarse material output pipe 59 is positioned directly opposite the primary coarse crushing ring seat 5. The end of the coarse material output pipe 59 is welded to and connected to the outer peripheral wall of the crushing column cylinder 4. A coarse material diversion port 64 is provided inside the primary coarse crushing ring seat 5. The coarse material diversion port 64 is connected to the coarse material output pipe 59. A coarse material partition 65 is fixed inside the coarse material diversion port 64.

[0103] The intermediate material output pipe 60 is positioned directly opposite the secondary intermediate crushing ring seat 6. The end of the intermediate material output pipe 60 is welded to and connected to the outer peripheral wall of the crushing column 4. An intermediate material diversion port 66 is provided inside the secondary intermediate crushing ring seat 6. The intermediate material diversion port 66 is connected to the intermediate material output pipe 60. An intermediate material partition 67 is fixed inside the intermediate material diversion port 66.

[0104] The fine material output pipe 61 is positioned directly opposite the three-stage fine crushing ring seat 7. The end of the fine material output pipe 61 is welded to and connected to the outer peripheral wall of the crushing column 4. The three-stage fine crushing ring seat 7 has a fine material diversion port 68 inside, which is connected to the fine material output pipe 61. A fine material partition 69 is fixed inside the fine material diversion port 68.

[0105] When using this invention:

[0106] Pharmaceutical raw materials are first fed into the feed pipe 52 through the feeding hopper 57. The spiral auger 55 driven by the conveying drive motor 54 pushes the material forward. After being guided by the guide pipe 56, it enters the first-stage coarse crushing ring seat 5 area of ​​the crushing column 4 from above.

[0107] In the coarse crushing zone, the outer cylinder 28 is driven to rotate by the third drive motor 34, and the coarse crushing rotating impeller and primary shearing blade 43 fixed on it rotate at high speed to perform the first round of collision and shearing crushing on the falling material.

[0108] Meanwhile, the compressed air generated by the air compressor 39 enters the rotating inner cylinder 8 through the air supply pipe 40. A portion of the compressed air is ejected from the impact outlet 42 corresponding to the area of ​​the rotating inner cylinder 8, the rotating middle cylinder 18 and the rotating outer cylinder 28, forming a rotating impact airflow to assist in stirring and impacting the material, and promote particle crushing and dispersion.

[0109] After initial crushing, under the action of airflow, centrifugal force and gravity, some particles that meet the requirements of coarse particle size will pass through the coarse material diversion port 64 on the primary coarse crushing ring seat 5, be screened by the coarse material screen 65, enter the coarse material output pipe 59, and be collected by the pneumatic conveyor 62 on it under negative pressure.

[0110] If the required crushing grade of the material is medium particle size, the above-mentioned coarse material collection is not carried out. Instead, the annular drive ring 46 is rotated by moving the drive lever 50, and the triangular rotating plate 45 is rotated and opened by the linkage arm 48. This series of operations opens the rotation opening and closing mechanism between the primary coarse crushing ring seat 5 and the secondary medium crushing ring seat 6, and controls the initially crushed coarse material to fall into the area of ​​the secondary medium crushing ring seat 6.

[0111] In this area, the rotating cylinder 18 is independently driven to rotate by the second drive motor 24, and the intermediate crushing rotating impeller and the secondary shearing blade 44 fixed on it perform a second round of finer crushing of the material;

[0112] At this time, compressed air is mainly ejected from the impact outlet 42 corresponding to the layer of the rotating inner cylinder 8 and the rotating middle cylinder 18, forming a more intense impact cyclone and enhancing the crushing effect.

[0113] Materials that reach a medium particle size pass through the medium material diversion port 66 on the secondary medium crushing ring seat 6, are screened by the medium material partition screen 67, and are collected under negative pressure by the medium material output pipe 60 and transported outward.

[0114] If the required crushing grade of the material is fine particles, the above-mentioned medium material collection is not carried out. Instead, the medium particles are allowed to enter the area of ​​the third-stage fine crushing ring seat 7 by opening the rotating opening and closing mechanism between the secondary medium crushing ring seat 6 and the tertiary fine crushing ring seat 7.

[0115] In this area, the inner cylinder 8 is driven to rotate by the first drive motor 15, which in turn drives the fine crushing rotary impeller 9 to rotate, for final ultrafine crushing.

[0116] In this layer, compressed air is concentrated and ejected through the impact outlet 42 corresponding to the area of ​​the rotating inner cylinder 8, forming the most powerful impact cyclone, realizing the deep composite crushing of cyclone impact and impeller shearing;

[0117] Qualified fine materials pass through the fine material diversion port 68 on the three-stage fine crushing ring seat 7, are screened by the fine material partition 69, and are then collected under negative pressure by the fine material output pipe 61 and transported outward.

[0118] All levels of drive motors, air compressors 39, conveyor drive motors 54, and pneumatic conveyors 62 are uniformly controlled by the integrated electrical control box 2. The speed, airflow, and timing of opening and closing mechanisms can be adjusted according to the material characteristics to achieve continuous and controllable multi-stage crushing and graded output.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization, characterized in that: The system includes a mounting base, on which a multi-stage crushing unit, a shearing and impact composite unit, a material feeding unit, and a grading output unit are respectively provided; The multi-stage crushing unit includes a crushing column with an open top, and the lower end of the crushing column is fixed to the upper surface of the mounting base by bolts. The inner circumferential wall of the crushing column is provided with a first-stage coarse crushing ring seat, a second-stage medium crushing ring seat, and a third-stage fine crushing ring seat with progressively decreasing inner diameters from top to bottom. Rotational opening and closing mechanisms are provided between the first-stage coarse crushing ring seat and the second-stage medium crushing ring seat, and between the second-stage medium crushing ring seat and the third-stage fine crushing ring seat. The inner bottom center of the crushing column is provided with a rotating inner cylinder with an opening at the top. The three-stage fine crushing ring seat is provided with a fine crushing rotating impeller, which is fixed on the outer peripheral wall of the rotating inner cylinder. A rotating middle cylinder is rotatably sleeved on the outer side of the rotating inner cylinder. A middle crushing rotating impeller is provided inside the secondary middle crushing ring seat. The middle crushing rotating impeller is divided into two symmetrical groups. Each group of the middle crushing rotating impeller includes several centrally symmetrical middle crushing blades. The ends of the middle crushing blades are welded to the outer peripheral wall of the rotating middle cylinder. A rotating outer cylinder is rotatably sleeved on the outer side of the rotating middle cylinder. A coarse crushing rotating impeller is provided inside the first-stage coarse crushing ring seat. The coarse crushing rotating impeller is divided into two symmetrical groups. Each group of coarse crushing rotating impellers includes several centrally symmetrical coarse crushing blades. The ends of the coarse crushing blades are welded to the outer peripheral wall of the rotating outer cylinder. The outer peripheral wall of the crushing column is welded with a first transmission box, a second transmission box and a third transmission box respectively. A first transmission motor is fixed on the upper surface of the first transmission box, and the rotating inner cylinder is driven to rotate independently by the first transmission motor. A second transmission motor is fixed on the upper surface of the second transmission box, and the rotating middle cylinder is driven to rotate independently by the second transmission motor. A third transmission motor is fixed on the upper surface of the third transmission box, and the rotating outer cylinder is driven to rotate independently by the third transmission motor. The graded output unit includes a coarse material output pipe, a medium material output pipe, and a fine material output pipe. Pneumatic conveyors are fixed on the upper surfaces of the coarse material output pipe, the medium material output pipe, and the fine material output pipe near their ends, and discharge inclined pipes are fixed at the lower ends of the coarse material output pipe, the medium material output pipe, and the fine material output pipe. The coarse material output pipe is positioned directly opposite the primary coarse crushing ring seat. The end of the coarse material output pipe is welded to and connected to the outer peripheral wall of the crushing column. A coarse material diversion port is provided inside the primary coarse crushing ring seat. The coarse material diversion port is connected to the coarse material output pipe. A coarse material partition is fixed inside the coarse material diversion port. The intermediate material output pipe is positioned directly opposite the secondary intermediate crushing ring seat. The end of the intermediate material output pipe is welded to and communicates with the outer peripheral wall of the crushing column. An intermediate material diversion port is provided inside the secondary intermediate crushing ring seat. The intermediate material diversion port is connected to the intermediate material output pipe. An intermediate material partition is fixed inside the intermediate material diversion port. The fine material output pipe is positioned directly opposite the three-stage fine crushing ring seat. The end of the fine material output pipe is welded to and connected to the outer peripheral wall of the crushing column. A fine material diversion port is provided inside the three-stage fine crushing ring seat. The fine material diversion port is connected to the fine material output pipe. A fine material partition is fixed inside the fine material diversion port.

2. The pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization according to claim 1, characterized in that: The mounting base is a horizontally grounded square base, and an integrated electrical control box is fixed to one side of the upper surface of the mounting base. The integrated electrical control box is connected to an external control panel.

3. The pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization according to claim 1, characterized in that: An upper partition plate is welded to the inner peripheral wall near the upper opening of the crushing column. An upper clamping opening is provided in the middle of the upper partition plate. A first retaining ring is rotatably clamped in the upper clamping opening. The inner ring of the first retaining ring is fixed to the outer peripheral wall of the rotating inner cylinder. A first driven gear is provided above the first retaining ring. The first driven gear is also fixed on the outer peripheral wall of the rotating inner cylinder. A first communication port is provided on the side wall of the crushing column corresponding to the first driven gear. The first transmission box is connected to the first communication port. The output shaft of the first drive motor passes downward through the first transmission box and is fixed with a first driving gear. A first transmission belt is sleeved between the first driving gear and the first driven gear. The middle section of the first transmission belt passes through the first connecting port and extends into the crushing column.

4. A pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization according to claim 3, characterized in that: The lower end of the rotating cylinder is flush with the lower end face of the secondary crushing ring seat, and the upper end of the rotating cylinder extends to the bottom of the upper partition plate. Below the upper partition is a middle partition, which is welded to the inner circumferential wall of the crushing column. A middle mounting port is provided in the middle of the middle partition, and a second retaining ring is rotatably mounted in the middle mounting port. The inner ring of the second retaining ring is fixed to the outer circumferential wall of the rotating middle cylinder. A second driven gear is provided above the second retaining ring. The second driven gear is also fixed on the outer peripheral wall of the rotating cylinder. A second communication port is provided on the side wall of the crushing column corresponding to the second driven gear. The second transmission box is connected to the second communication port. The output shaft of the second drive motor passes downward through the second transmission box and is fixed with a second drive gear. A second transmission belt is sleeved between the second drive gear and the second driven gear. The middle section of the second transmission belt passes through the second connecting port and extends into the crushing column.

5. A pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization according to claim 4, characterized in that: The lower end of the rotating outer cylinder is flush with the lower end face of the primary coarse crushing ring seat, and the upper end of the rotating outer cylinder extends to the bottom of the middle layer partition. Below the middle partition is a lower partition, which is welded to the inner circumferential wall of the crushing column. The lower partition has a lower mounting opening in the middle, and a third retaining ring is rotatably mounted in the lower mounting opening. The inner ring of the third retaining ring is fixed to the outer circumferential wall of the rotating outer cylinder. A third driven gear is provided above the third retaining ring. The third driven gear is also fixed on the outer peripheral wall of the rotating outer cylinder. A third connecting port is provided on the side wall of the crushing column corresponding to the third driven gear. The third transmission box is connected to the third connecting port. The output shaft of the third drive motor passes downward through the third transmission box and is fixed with a third driving gear. A third transmission belt is sleeved between the third driving gear and the third driven gear. The middle section of the third transmission belt passes through the third connecting port and extends into the crushing column.

6. A pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization according to claim 1, characterized in that: A detachable upper cover is installed at the upper opening of the crushing column. The shearing and impact composite unit includes an air compressor. The air compressor is fixed in the middle of the upper surface of the upper cover. An air supply pipe is connected to the lower end of the air compressor. The lower end of the air supply pipe passes through the upper cover and extends into the crushing column. The lower end of the air supply pipe is rotatably sleeved on the outer peripheral wall of the rotating inner cylinder, and a sealing ring is fitted between the air supply pipe and the rotating inner cylinder; The outer peripheral wall of the rotating inner cylinder is provided with several sets of impact air outlets corresponding to the first-stage coarse crushing ring seat, the second-stage medium crushing ring seat and the third-stage fine crushing ring seat. The outer peripheral wall of the rotating middle cylinder is also provided with several sets of impact air outlets corresponding to the first-stage coarse crushing ring seat and the second-stage medium crushing ring seat. The outer peripheral wall of the rotating outer cylinder is also provided with several sets of impact air outlets corresponding to the first-stage coarse crushing ring seat.

7. A pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization according to claim 6, characterized in that: The shearing impact composite unit also includes a primary shearing blade and a secondary shearing blade, and each of the primary and secondary shearing blades is provided with a plurality of blades; Several primary shearing blades are symmetrically arranged between the upper and lower sets of coarse crushing rotating impellers, and the end of each primary shearing blade is welded to the outer peripheral wall of the rotating outer cylinder. Several secondary shear blades are symmetrically arranged between the upper and lower sets of intermediate crushing rotating impellers, and the end of each secondary shear blade is welded to the outer peripheral wall of the rotating cylinder.

8. A pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization according to claim 1, characterized in that: One set of the rotating opening and closing mechanisms includes several rotationally symmetrical triangular rotating plates. One corner of each triangular rotating plate is hinged between the lower surface of the primary coarse crushing ring seat and the upper surface of the secondary intermediate crushing ring seat. An annular drive ring is rotatably provided on the outer side of each of the triangular rotating plates. Several hinge seats are fixed on the inner circumferential wall of the annular drive ring corresponding to each of the triangular rotating plates. A linkage arm is hinged to each hinge seat. The end of the linkage arm is hinged to another triangle of the triangular rotating plate. The outer peripheral wall of the crushing column is provided with a turning communication port corresponding to the annular drive ring. A drive paddle is fixed on the outer peripheral wall of the annular drive ring, directly opposite the turning communication port. The end of the drive paddle passes through the turning communication port and extends to its outer side. The aforementioned rotating opening and closing mechanism is also provided between the secondary intermediate crushing ring seat and the tertiary fine crushing ring seat.

9. A pulverizing unit based on multi-stage cyclone impact and shearing composite pulverization according to claim 1, characterized in that: The material feeding unit includes a feeding support plate, which is an inverted L-shaped plate. The lower end of the vertical part of the feeding support plate is welded to the upper surface of the mounting base, and the lower end of the horizontal part of the feeding support plate is welded to the outer peripheral wall of the crushing column. A laterally extending feed pipe is fixed to the upper surface of the feed support plate. One end of the feed pipe is fixedly connected to the crushing column. A side end cover is fixed to the other end of the feed pipe. A conveying drive motor is fixed to the side end cover. The output shaft of the conveying drive motor passes through the side end cover and is fixed with a spiral auger. The end of the spiral auger extends into the crushing column. A guide pipe is provided on the outside of the spiral auger. The end of the guide pipe extends to the inner ring above the primary coarse crushing ring seat. The upper end of the feed pipe is fixed with a feeding hopper that communicates with it, and the upper end of the feeding hopper is provided with two closed end caps on both sides.

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