Jet mill with adjustable crushing particle size

Abstract

The utility model discloses a jet mill with adjustable crushing particle size, and relates to the technical field of material crushing, the jet mill comprises a separation bin and a separation disc connected to the bottom end of the separation bin, the separation disc is provided with a conveying assembly used for conveying materials and high-pressure airflow into the separation disc, the side wall of the separation bin is rotatably provided with a rotating cylinder, and the rotating cylinder is provided with a rotating shaft. A grading wheel extending in the radial direction of the separating bin is connected to the rotating cylinder, the other end of the grading wheel is connected with a discharging pipe, and a driving assembly driving the grading wheel to rotate is arranged on the outer wall of the separating bin. The grading wheel comprises an outer wheel and an inner wheel, the inner wheel is rotatably arranged in the outer wheel in an attached mode, the central axis of the inner wheel coincides with the central axis of the outer wheel, a first screening opening is formed in the outer wheel, a second screening opening is formed in the inner wheel, and the first screening opening is correspondingly communicated with the second screening opening. Stepless adjustment of the size of a screening opening is achieved through relative rotation of the inner wheel and the outer wheel, and limitation of a traditional fixed grading wheel is broken through.

Description

Technical Field

[0001] This utility model relates to the field of material crushing technology, specifically to an airflow pulverizer with adjustable particle size. Background Technology

[0002] In modern industrial production, air jet mills are widely used in many fields such as chemical, pharmaceutical, food, mining, and electronic materials due to their significant advantages, including ultrafine grinding, uniform particle size distribution, low-temperature grinding, and low impurity contamination. For example, in the pharmaceutical industry, drugs need to be pulverized to a specific particle size to improve bioavailability; in the field of electronic materials, precise control of powder particle size directly affects product performance.

[0003] However, the existing classifier wheel structure in air jet mills is usually fixed, making it impossible to flexibly adjust to the particle size requirements of different materials during actual use. This means that when it is necessary to change the type of material or adjust the particle size of the product during production, operators can only meet the requirements by replacing the entire classifier wheel assembly or even replacing the entire equipment. This operation is cumbersome, time-consuming, and labor-intensive, increasing production costs and equipment maintenance difficulties. At the same time, the fixed classifier wheel structure is difficult to adapt to diverse material characteristics, easily resulting in low grinding efficiency and an inability to achieve precise control of material particle size, thereby affecting product quality and production efficiency.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] The purpose of this invention is to provide an airflow pulverizer with adjustable particle size to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides an airflow pulverizer with adjustable particle size, including a separation chamber and a separation disc connected to its bottom end. The separation disc is provided with a conveying component for conveying materials and high-pressure airflow into it. A rotating cylinder is rotatably installed on the side wall of the separation chamber. A classifying wheel extending radially along the separation chamber is connected to the rotating cylinder. The other end of the classifying wheel is connected to a discharge pipe. A drive component for driving the classifying wheel to rotate is provided on the outer wall of the separation chamber.

[0007] The grading wheel includes an outer wheel and an inner wheel. The inner wheel is rotatably mounted inside the outer wheel, and the central axes of the inner wheel and the outer wheel coincide. The outer wheel has a first screening port, and the inner wheel has a second screening port. The first screening port and the second screening port are connected to each other. An adjusting rod is provided inside the rotating cylinder to drive the inner wheel to rotate. The adjusting rod drives the inner wheel to rotate to adjust the size of the connection between the first screening port and the second screening port.

[0008] Furthermore, the conveying assembly includes a connecting pipe connected to the outer wall of the separation disc, with a conveying pipe connected to one end of the connecting pipe away from the separation disc, an air supply pipe connected to the other end of the conveying pipe, and a feeding hopper connected to the conveying pipe.

[0009] Furthermore, one end of the adjusting rod is rotatably connected to the inner wall of the rotating cylinder, and the other end of the adjusting rod is fixedly connected to the inner wheel.

[0010] Furthermore, one end of the adjusting rod penetrates the side wall of the rotating cylinder and extends outward, and a pointer is connected to the end of the adjusting rod extending to the outside of the rotating cylinder. A scale mark corresponding to the pointer is provided on the outer end face of the rotating cylinder.

[0011] Furthermore, it also includes a locking assembly disposed inside the rotating cylinder for locking the rotation of the adjusting rod. The locking assembly includes a fixed toothed disc fixed to the outer wall of the adjusting rod, and a movable toothed disc slidably mounted on the adjusting rod. The fixed toothed disc and the movable toothed disc are provided with teeth that can mesh with each other on opposite sides. A support spring is also sleeved on the adjusting rod. One end of the support spring is connected to the movable toothed disc, and the other end is connected to the inside of the rotating cylinder. In the initial state, the elastic force of the support spring pushes the movable toothed disc to be in close contact with the fixed toothed disc. An electromagnetic ring is also installed inside the rotating cylinder. When the electromagnetic ring is energized, its magnetic attraction pulls the movable toothed disc away from the fixed toothed disc.

[0012] Furthermore, the drive assembly includes a driven gear connected to the outer wall of the rotating cylinder, a drive motor is installed on the outer wall of the separation chamber, the drive end of the drive motor is connected to a driving gear, and the driving gear meshes with the driven gear.

[0013] Furthermore, a bracket is installed on the outer wall of the separation chamber, and the drive motor is fixedly mounted on the bracket.

[0014] Furthermore, the discharge pipe is rotatably connected to the outer wall of the separation chamber, and a feeding pipe communicating with the discharge pipe is also installed on the outer wall of the separation chamber.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. In this utility model, the grading wheel consists of an outer wheel and an inner wheel. The operator can adjust the rotating rod to drive the inner wheel to rotate relative to the outer wheel, thereby changing the size of the connecting part between the first screening port and the second screening port, improving the screening accuracy of the grading wheel, and expanding the application range of the equipment.

[0017] 2. In this utility model, the support spring pushes the movable toothed disc to mesh tightly with the fixed toothed disc, providing a stable locking effect for the adjusting rod. This ensures that the relative position of the inner and outer wheels remains unchanged during the high-speed rotation of the classifying wheel, preventing changes in the size of the screening port connection due to vibration or other factors, thus guaranteeing the accuracy of the crushed particle size. When particle size adjustment is required, the electromagnetic ring is energized to generate magnetic attraction, pulling the movable toothed disc to overcome the spring force and separate from the fixed toothed disc. At this time, the operator can easily rotate the adjusting rod, ensuring the stability of product quality and reducing the risk of equipment failure caused by structural instability, thereby extending the service life of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the right-side structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0020] Figure 3 This is a side view of the structure of this utility model;

[0021] Figure 4 For along Figure 3 A schematic diagram of the cross-sectional structure along the center section AA;

[0022] Figure 5 For along Figure 3 A schematic diagram of the cross-sectional structure along the center section BB;

[0023] Figure 6 for Figure 4 Enlarged view of the structure at point A in the middle;

[0024] Figure 7 This is a schematic diagram of the structure of the grading wheel in this utility model;

[0025] Figure 8 This is a cross-sectional structural diagram of the grading wheel in this utility model.

[0026] In the diagram: 1. Separation chamber; 2. Separation disc; 3. Connecting pipe; 4. Conveying pipe; 5. Air supply pipe; 6. Feed hopper; 7. Feeding pipe; 8. Rotating drum; 9. Driven gear; 10. Drive motor; 11. Driving gear; 12. Adjusting rod; 13. Pointer; 14. Fixed gear disc; 15. Movable gear disc; 16. Support spring; 17. Electromagnetic ring; 18. Discharge pipe; 19. Outer wheel; 20. Inner wheel. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those of ordinary skill in the art without creative effort are all within the scope of protection of the present utility model.

[0028] Please see Figures 1-8 This utility model provides a technical solution: an airflow pulverizer with adjustable particle size, including a separation chamber 1 and a separation disc 2 connected to its bottom end. The separation disc 2 is provided with a conveying component for conveying materials and high-pressure airflow into it. A rotating cylinder 8 is rotatably installed on the side wall of the separation chamber 1. A classifying wheel extending radially along the separation chamber 1 is connected to the rotating cylinder 8. The other end of the classifying wheel is connected to a discharge pipe 18. A drive component for driving the classifying wheel to rotate is provided on the outer wall of the separation chamber 1.

[0029] The grading wheel includes an outer wheel 19 and an inner wheel 20. The inner wheel 20 is fitted and rotates inside the outer wheel 19, and the central axis of the inner wheel 20 coincides with that of the outer wheel 19. The outer wheel 19 has a first screening port, and the inner wheel 20 has a second screening port. The first screening port and the second screening port are connected to each other. An adjusting rod 12 is provided inside the rotating cylinder 8 to drive the inner wheel 20 to rotate. The adjusting rod 12 drives the inner wheel 20 to rotate to adjust the size of the connection between the first screening port and the second screening port.

[0030] Specifically, the material and high-pressure airflow enter the separation disc 2 through the conveying assembly connecting pipe 3, conveying pipe 4, air supply pipe 5, and feed hopper 6. Under the action of centrifugal force, coarse particles are thrown to the outside, while fine particles rise with the airflow to the classifying wheel area. The classifying wheel consists of an outer wheel 19 and an inner wheel 20, with the first screening port on the outer wheel 19 corresponding to and connected to the second screening port on the inner wheel 20. The drive assembly drives the motor 10, the driving gear 11, and the driven gear 9 to rotate the rotating cylinder 8, thereby causing the entire classifying wheel to rotate and generate centrifugal force. When the adjusting rod 12 drives the inner wheel 20 to rotate relative to the outer wheel 19, the size of the connecting part between the first screening port and the second screening port can be adjusted, thereby controlling the particle size passing through the classifying wheel. Particles meeting the required particle size enter the discharge pipe 18 and are discharged through the feeding pipe 7. The size of the sieve opening is adjusted by the relative rotation of the inner wheel 20 and the outer wheel 19, allowing for flexible adjustment of the crushed particle size without replacing the grading wheel assembly. The pointer 13, in conjunction with the scale markings, can intuitively display the adjustment angle, facilitating precise control of the particle size. The locking components, including the fixed toothed disc 14, the movable toothed disc 15, the support spring 16, and the electromagnetic ring 17, ensure the stability of the grading wheel structure after adjustment and prevent loosening during operation.

[0031] See Figure 1 and Figure 5The conveying assembly includes a connecting pipe 3 connected to the outer wall of the separating disc 2. One end of the connecting pipe 3 away from the separating disc 2 is connected to a conveying pipe 4, and the other end of the conveying pipe 4 is connected to an air supply pipe 5. A feeding hopper 6 is also connected to the conveying pipe 4.

[0032] Specifically, high-pressure airflow is provided to the air pipe 5, and the material enters the conveying pipe 4 from the feed hopper 6. Driven by the airflow, it enters the separation disc 2 through the connecting pipe 3. The airflow speed and the feed rate can be independently controlled by the parameters of each component of the conveying assembly.

[0033] See Figure 6 One end of the adjusting rod 12 is rotatably connected to the inner wall of the rotating cylinder 8, and the other end of the adjusting rod 12 is fixedly connected to the inner wheel 20.

[0034] Specifically, one end of the adjusting rod 12 is rotatably connected to the inner wall of the rotating cylinder 8, and the other end is fixed to the inner wheel 20, forming a stable rotating pair. When the adjusting rod 12 rotates, it directly drives the inner wheel 20 to rotate synchronously. The support structure of the adjusting rod 12 ensures that the inner wheel 20 rotates smoothly, avoiding vibration and wear caused by eccentricity, simplifying the transmission structure and improving the adjustment accuracy.

[0035] See Figure 2 One end of the adjusting rod 12 passes through the side wall of the rotating cylinder 8 and extends outward, and the end of the adjusting rod 12 extending to the outside of the rotating cylinder 8 is connected to a pointer 13. The outer end face of the rotating cylinder 8 is provided with a scale mark corresponding to the pointer 13.

[0036] Specifically, one end of the adjusting rod 12 extending to the outside of the rotating cylinder 8 is connected to a pointer 13, and the scale markings on the outer end face of the rotating cylinder 8 correspond to different particle size settings. When the operator rotates the adjusting rod 12, the pointer 13 rotates accordingly, indicating the current adjustment position, thus visualizing the adjustment process, reducing the difficulty of operation, and the scale markings can be calibrated according to experimental data, improving the accuracy and repeatability of particle size adjustment.

[0037] See Figure 4 and Figure 6 It also includes a locking assembly inside the rotating cylinder 8 for locking the rotation of the adjusting rod 12. The locking assembly includes a fixed toothed disc 14 fixed on the outer wall of the adjusting rod 12. A movable toothed disc 15 is also slidably mounted on the adjusting rod 12. The fixed toothed disc 14 and the movable toothed disc 15 are provided with teeth that can mesh with each other on opposite sides. A support spring 16 is also sleeved on the adjusting rod 12. One end of the support spring 16 is connected to the movable toothed disc 15, and the other end is connected to the inside of the rotating cylinder 8. In the initial state, the elastic force of the support spring 16 pushes the movable toothed disc 15 to be in close contact with the fixed toothed disc 14. An electromagnetic ring 17 is also installed inside the rotating cylinder 8. When the electromagnetic ring 17 is energized, its magnetic attraction pulls the movable toothed disc 15 away from the fixed toothed disc 14.

[0038] Specifically, in the initial state, the support spring 16 pushes the movable gear disk 15 to engage with the fixed gear disk 14, locking the adjusting rod 12. When adjustment is needed, the electromagnetic ring 17 is energized to generate a magnetic attraction force, pulling the movable gear disk 15 to overcome the spring force and separate from the fixed gear disk 14. At this time, the adjusting rod 12 can be rotated. After adjustment, the electromagnetic ring 17 is de-energized, and the spring force causes the two gear disks to re-engage and lock. The electromagnetic locking method has a rapid response, is easy to operate, and can achieve rapid adjustment. The gear disk engagement lock provides sufficient locking torque to prevent the adjustment position from shifting due to vibration during operation.

[0039] See Figure 2 The drive assembly includes a driven gear 9 connected to the outer wall of the rotating cylinder 8, a drive motor 10 installed on the outer wall of the separation chamber 1, and a drive gear 11 connected to the drive end of the drive motor 10. The drive gear 11 meshes with the driven gear 9.

[0040] Specifically, the drive motor 10 drives the driven gear 9 via the driving gear 11, thereby driving the rotating cylinder 8 and the classifier wheel to rotate as a whole. The gear transmission provides stable torque transmission and speed control.

[0041] See Figure 2 A bracket is installed on the outer wall of the separation chamber 1, and the drive motor 10 is fixedly installed on the bracket.

[0042] Specifically, the bracket structure enhances the rigidity of the drive components, improves transmission accuracy, and facilitates the installation, disassembly, and maintenance of the motor.

[0043] See Figure 1 and Figure 4 The discharge pipe 18 is rotatably connected to the outer wall of the separation chamber 1, and a feeding pipe 7 connected to the discharge pipe 18 is also installed on the outer wall of the separation chamber 1.

[0044] Specifically, the discharge pipe 18 is rotatably connected to the outer wall of the separation chamber 1 and rotates synchronously with the classifying wheel to convey qualified particles to the feeding pipe 7. The feeding pipe 7 is fixedly connected to the separation chamber 1 and is connected to the discharge pipe 18 through a rotary sealing structure.

[0045] Working principle: Material enters the conveying pipe 4 through the feeding hopper 6, and high-pressure airflow is introduced through the air supply pipe 5. The two mix in the conveying pipe 4 and then enter the separation disc 2 through the connecting pipe 3. Inside the separation disc 2, the airflow carries the material particles and rotates at high speed. Coarse particles are thrown to the outside due to the greater centrifugal force, while fine particles rise with the airflow to the grading wheel area at the top of the separation chamber 1. The grading wheel consists of an outer wheel 19 and an inner wheel 20. The drive motor 10 drives the rotating drum 8 and the grading wheel to rotate as a whole through gear transmission. The centrifugal force generated by the rotation causes coarse particles to be thrown outward, while fine particles that meet the particle size requirements enter the discharge pipe 18 through the screening ports on the outer wheel 19 and the inner wheel 20, and are finally discharged through the feeding pipe 7. When it is necessary to adjust the crushed particle size, the electromagnetic ring 17 is energized to separate the movable toothed disc 15 from the fixed toothed disc 14, releasing the lock on the adjusting rod 12. Rotating the adjusting rod 12 drives the inner wheel 20 to rotate relative to the outer wheel 19, changing the communication area between the first screening port and the second screening port.

Claims

1. An air jet mill with adjustable particle size, comprising a separation chamber (1) and a separation disc (2) connected to its bottom end, characterized in that: The separation disc (2) is provided with a conveying assembly for conveying materials and high-pressure airflow into it. A rotating cylinder (8) is rotatably installed on the side wall of the separation chamber (1). A classifying wheel extending radially along the separation chamber (1) is connected to the rotating cylinder (8). The other end of the classifying wheel is connected to a discharge pipe (18). A drive assembly for driving the classifying wheel to rotate is provided on the outer wall of the separation chamber (1). The grading wheel includes an outer wheel (19) and an inner wheel (20). The inner wheel (20) is fitted and rotated inside the outer wheel (19), and the central axis of the inner wheel (20) coincides with that of the outer wheel (19). The outer wheel (19) has a first screening port, and the inner wheel (20) has a second screening port. The first screening port and the second screening port are connected to each other. The rotating cylinder (8) is provided with an adjusting rod (12) that drives the inner wheel (20) to rotate. The adjusting rod (12) drives the inner wheel (20) to rotate to adjust the size of the connection between the first screening port and the second screening port.

2. The jet mill with an adjustable pulverization particle size according to claim 1, characterized in that: The conveying assembly includes a connecting pipe (3) connected to the outer wall of the separating disc (2), a conveying pipe (4) connected to one end of the connecting pipe (3) away from the separating disc (2), an air supply pipe (5) connected to the other end of the conveying pipe (4), and a feeding hopper (6) connected to the conveying pipe (4).

3. The jet mill with an adjustable pulverization particle size according to claim 1, characterized in that: One end of the adjusting rod (12) is rotatably connected to the inner wall of the rotating cylinder (8), and the other end of the adjusting rod (12) is fixedly connected to the inner wheel (20).

4. The jet mill with an adjustable pulverization particle size according to claim 3, characterized in that: One end of the adjusting rod (12) passes through the side wall of the rotating cylinder (8) and extends outward. The end of the adjusting rod (12) extending to the outside of the rotating cylinder (8) is connected to a pointer (13). The outer end face of the rotating cylinder (8) is provided with a scale mark corresponding to the pointer (13).

5. The jet mill with an adjustable pulverization particle size according to claim 3, characterized in that: It also includes a locking assembly set inside the rotating cylinder (8) for locking the rotation of the adjusting rod (12). The locking assembly includes a fixed toothed disc (14) fixed on the outer wall of the adjusting rod (12). A movable toothed disc (15) is also slidably mounted on the adjusting rod (12). The fixed toothed disc (14) and the movable toothed disc (15) are provided with teeth that can mesh with each other on opposite sides. A support spring (16) is also sleeved on the adjusting rod (12). One end of the support spring (16) is connected to the movable toothed disc (15), and the other end is connected to the inside of the rotating cylinder (8). In the initial state, the elastic force of the support spring (16) pushes the movable toothed disc (15) and the fixed toothed disc (14) to be in close contact. An electromagnetic ring (17) is also installed inside the rotating cylinder (8). When the electromagnetic ring (17) is energized, its magnetic attraction pulls the movable toothed disc (15) away from the fixed toothed disc (14).

6. The airflow pulverizer with adjustable particle size as described in claim 1, characterized in that: The drive assembly includes a driven gear (9) connected to the outer wall of the rotating cylinder (8), and a drive motor (10) is installed on the outer wall of the separation chamber (1). The drive end of the drive motor (10) is connected to a drive gear (11), and the drive gear (11) meshes with the driven gear (9).

7. The jet mill with an adjustable pulverization particle size according to claim 6, characterized in that: A support is mounted on the outer wall of the separation bin (1), and the driving motor (10) is fixedly mounted on the support.

8. The airflow pulverizer with adjustable particle size as described in claim 1, characterized in that: The discharge pipe (18) is rotatably connected to the outer wall of the separation bin (1), and a feeding pipe (7) in communication with the discharge pipe (18) is also mounted on the outer wall of the separation bin (1).

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