Anti-sinking mechanism for jet mill equipment

Abstract

The utility model relates to the technical field of jet mills, in particular to an anti-sinking mechanism for jet mill equipment. The device comprises a crushing tank, an intermittent feeding mechanism and a filtering mechanism, a plurality of first high-pressure nozzles are mounted at the lower part of the crushing tank; a second high-pressure nozzle is further mounted at the bottom end of the crushing tank; the intermittent feeding mechanism comprises a discharging pipe, a first fixing disc, a discharging pipe, a lower rotating disc, an upper rotating disc, a second fixing disc, a plurality of storage pipes and a driving assembly used for driving the lower rotating disc to rotate. The filtering mechanism is mounted at the top inside the crushing tank. According to the technical scheme, materials can be intermittently conveyed into the crushing tank to be crushed through the arranged intermittent feeding mechanism, the situation that a large number of materials sink to the bottom due to excessive continuous feeding is avoided, it can be guaranteed that the amount of the materials output every time is roughly equal, a weighing structure does not need to be additionally arranged, and the equipment cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of air jet mill technology, and in particular to an anti-sinking mechanism for air jet mill equipment. Background Technology

[0002] An air jet mill (also known as an air jet pulverizer) is a core piece of equipment that utilizes the energy of high-speed airflow (300–500 m / s) or superheated steam to achieve ultrafine pulverization of materials through inter-particle impact and collision. Its advantage lies in its ability to produce high-purity powders with a particle size of less than 5 μm and uniform distribution, making it particularly suitable for pollution-sensitive fields such as pharmaceuticals and high-value-added materials.29 However, the problem of material deposition at the bottom of the pulverizing chamber has long constrained equipment efficiency and product quality.

[0003] To prevent excessive material from settling to the bottom, existing technologies generally employ an intermittent feeding structure. This involves weighing the discharged material, opening a valve to discharge it when the discharge volume is reached, and then repeating the weighing-valve-discharge-valve-closure process after the material has been discharged. This undoubtedly reduces the discharge efficiency. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing an anti-sinking mechanism for airflow mill equipment.

[0005] The technical solution of this utility model is an anti-sinking mechanism for an air jet mill, comprising:

[0006] The grinding tank has a funnel-shaped bottom and a support at the bottom of the bracket; multiple first high-pressure nozzles are installed at the bottom of the grinding tank and arranged in a circular array; a second high-pressure nozzle is also installed at the bottom of the grinding tank.

[0007] An intermittent feeding mechanism includes a discharge pipe, a first fixed plate, a feed pipe, a lower rotating plate, an upper rotating plate, a second fixed plate, multiple storage pipes, and a drive assembly for driving the lower rotating plate to rotate. The first and second fixed plates are both connected to the outer wall of the crushing tank. The lower and upper rotating plates are rotatably connected to the first and second fixed plates, respectively. The multiple storage pipes are arranged in a circular array. The two ends of the storage pipes pass through the lower and upper rotating plates, respectively. The bottom end of the feed pipe passes through the second fixed plate. The upper end of the discharge pipe passes through the first fixed plate, and its lower end communicates with the inside of the crushing tank.

[0008] The filter mechanism is installed at the top inside the pulverizing tank.

[0009] Preferably, a bent pipe is provided on the inner side of the grinding tank, the bent pipe is connected to the inner wall of the grinding tank, and a conical hopper is connected to the bottom end of the bent pipe. The conical hopper is an inverted circular funnel structure.

[0010] Preferably, the filtration mechanism includes a filter cartridge, a discharge pipe, and a second servo motor. The filter cartridge is located on the upper inner side of the grinding tank. One end of the filter cartridge is connected to a rotating shaft, which is rotatably installed inside the grinding tank. The second servo motor is installed on the grinding tank and its output shaft is connected to the rotating shaft. The discharge pipe passes through the inner and outer sides of the grinding tank, communicates with the inside of the filter cartridge, and is rotatably connected to the filter cartridge.

[0011] Preferably, it also includes an anti-clogging mechanism, which includes a collection hood and a nozzle. The nozzle and the collection hood are respectively located on the inner and outer sides of the filter cartridge. The nozzle and the collection hood are in contact with the inner and outer walls of the filter cartridge. An airflow pipe is connected to the nozzle and extends through the inner and outer sides of the discharge pipe. The airflow pipe is fixedly connected to the crushing tank. A slag discharge pipe is connected to the collection hood, and a cloth bag is provided at the outer end of the slag discharge pipe.

[0012] Preferably, the drive assembly includes a first servo motor, a gear, and a gear ring. The first servo motor is mounted on the crushing tank, the gear is mounted on the output shaft of the first servo motor, and the gear ring is disposed on the outer periphery of the lower rotating disk and meshes with the gear.

[0013] Preferably, the second high-pressure nozzle is directed upwards; the multiple first high-pressure nozzles are directed towards the center of the pulverizing tank.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: the intermittent feeding mechanism in this technical solution can intermittently transport materials to the inside of the crushing tank for crushing, avoiding a large amount of material settling to the bottom due to excessive continuous feeding, and ensuring that the amount of material output each time is approximately equal, without the need for an additional weighing structure, resulting in high conveying efficiency and saving equipment costs. Attached Figure Description

[0015] Figure 1 and Figure 2 All of these are schematic diagrams of the structure of this utility model.

[0016] Figure 3 This is a cross-sectional view of the pulverizing tank in this utility model.

[0017] Figure 4 This is a cross-sectional view of the filter cartridge in this utility model.

[0018] Figure 5 This is a partial exploded view of the intermittent feeding mechanism in this utility model.

[0019] Reference numerals: 1. Crushing tank; 2. Support; 3. First high-pressure nozzle; 4. Second high-pressure nozzle; 5. Conical hopper; 6. Bend; 7. Filter cartridge; 8. Discharge pipe; 9. First fixed plate; 10. Feed pipe; 11. Lower rotating plate; 12. Upper rotating plate; 13. Storage pipe; 14. Rotating shaft; 15. Collection hood; 16. Nozzle; 17. Slag discharge pipe; 18. Airflow pipe; 19. Discharge pipe; 20. Filter bag; 21. Second fixed plate; 22. First servo motor; 23. Gear; 24. Gear ring; 25. Second servo motor. Detailed Implementation

[0020] Example 1

[0021] like Figures 1-5 As shown in this embodiment, an anti-sinking mechanism for an air jet mill includes a grinding tank 1, an intermittent feeding mechanism, and a filtering mechanism.

[0022] The bottom of the crushing tank 1 is funnel-shaped, and the bottom of the support 2 is provided with the support 2; multiple first high-pressure nozzles 3 are installed at the bottom of the crushing tank 1, and the multiple first high-pressure nozzles 3 are arranged in a circular array; a second high-pressure nozzle 4 is also installed at the bottom of the crushing tank 1.

[0023] The intermittent feeding mechanism includes a discharge pipe 8, a first fixed plate 9, a feed pipe 10, a lower rotating plate 11, an upper rotating plate 12, a second fixed plate 21, multiple storage pipes 13, and a drive assembly for driving the lower rotating plate 11 to rotate. The drive assembly includes a first servo motor 22, a gear 23, and a gear ring 24. The first servo motor 22 is mounted on the crushing tank 1, the gear 23 is mounted on the output shaft of the first servo motor 22, and the gear ring 24 is located on the outer periphery of the lower rotating plate 11 and meshes with the gear 23. The first fixed plate 9 and the second fixed plate 21 are both connected to the outer wall of the crushing tank 1. The lower rotating plate 11 and the upper rotating plate 12 are rotatably connected to the first fixed plate 9 and the second fixed plate 21, respectively. The multiple storage pipes 13 are arranged in a circular array. The two ends of the storage pipes 13 pass through the lower rotating plate 11 and the upper rotating plate 12, respectively. The bottom end of the feed pipe 10 passes through the second fixed plate 21. The upper end of the discharge pipe 8 passes through the first fixed plate 9, and its lower end communicates with the inside of the crushing tank 1.

[0024] The filtration mechanism is installed at the top inside the crushing tank 1. The filtration mechanism includes a filter cylinder 7, a discharge pipe 19, and a second servo motor 25. The filter cylinder 7 is located at the top inside the crushing tank 1. One end of the filter cylinder 7 is connected to a rotating shaft 14. The rotating shaft 14 is rotatably installed inside the crushing tank 1. The second servo motor 25 is installed on the crushing tank 1 and its output shaft is connected to the rotating shaft 14. The discharge pipe 19 passes through the inside and outside of the crushing tank 1. The discharge pipe 19 communicates with the inside of the filter cylinder 7 and is rotatably connected to the filter cylinder 7.

[0025] Preferably, the second high-pressure nozzle 4 sprays upwards; the spraying direction of the plurality of first high-pressure nozzles 3 is all towards the inner center of the pulverizing tank 1.

[0026] In this embodiment, the feeding pipe 10 is used to communicate with the bottom of the material box. The material inside the material box is discharged into the feeding pipe 10. The driving component drives the lower rotating disk 11 to rotate intermittently, thereby driving multiple storage pipes 13 to rotate around the center of the lower rotating disk 11. When one of the storage pipes 13 moves to the position directly below the feeding pipe 10, the driving of the lower rotating disk 11 stops. At this time, the material falls into the storage pipe 13 and fills the inner cavity of the storage pipe 13. The lower rotating disk 11 is continuously driven to rotate. When the storage pipe 13 carrying the material moves to the position directly above the discharge pipe 8, the material inside the storage pipe 13 is discharged into the bottom of the crushing tank 1 through the discharge pipe 8. Compressed gas is sprayed out through the second high-pressure nozzle 4 and multiple first high-pressure nozzles 3. The material particles obtain extremely high speed in the high-speed airflow, and then are crushed through the violent collision, friction and shearing action between the particles.

[0027] It should be added that in the air jet mill, the core equipment for generating high-speed airflow is the high-pressure gas supply system, which is key to converting the pressure energy of high-pressure gas into supersonic airflow through nozzles; the high-pressure gas supply system uses an air compressor, and both the first high-pressure nozzle 3 and the second high-pressure nozzle 4 can be Laval nozzles.

[0028] Example 2

[0029] like Figure 3 As shown in this embodiment, an anti-sinking mechanism for an airflow mill is proposed. Compared with Embodiment 1, in this embodiment, a bent pipe 6 is provided on the inner side of the grinding tank 1. The bent pipe 6 is connected to the inner wall of the grinding tank 1. A conical hopper 5 is connected to the bottom end of the bent pipe 6. The conical hopper 5 is an inverted circular funnel structure. The upward material enters into the bent pipe 6. The airflow direction is forcibly changed by the bent pipe 6, making the flow direction of the material tortuous, thereby prolonging the collision time of some particles of the material and improving the grinding effect.

[0030] Example 3

[0031] like Figure 2 and Figure 4As shown in the figure, the anti-sinking mechanism for an air classifier mill proposed in this embodiment, compared with the first embodiment, also includes an anti-clogging mechanism. The anti-clogging mechanism includes a collection hood 15 and a nozzle 16. The nozzle 16 and the collection hood 15 are respectively located on the inner and outer sides of the filter cylinder 7. The nozzle 16 and the collection hood 15 are respectively in contact with the inner and outer walls of the filter cylinder 7. An airflow pipe 18 is connected to the nozzle 16. The airflow pipe 18 extends to the inner and outer sides of the discharge pipe 19. The airflow pipe 18 is fixedly connected to the crushing tank 1. A slag discharge pipe 17 is connected to the collection hood 15. A cloth bag 20 is provided at the outer end of the slag discharge pipe 17. Materials of the correct size enter the filter cylinder 7 and are finally discharged through the discharge pipe 19. The diameter of the discharge pipe 19 is not limited to the size shown in the figure. One end of the discharge pipe 19 can be connected to a device for collecting materials to achieve the separation of gas and materials, such as a bag filter. The above is the prior art, so it will not be described in detail.

[0032] When the second servo motor 25 is started, it drives the filter cartridge 7 to rotate. The collection hood 15 and the nozzle 16 can scrape off the excess material on the inner and outer walls of the filter cartridge 7. The end of the airflow pipe 18 is connected to the output end of the blower. The high-speed airflow enters the interior of the nozzle 16 and is finally sprayed out through the nozzle 16. This can blow away the impurities in the multiple meshes on the filter cartridge 7 located between the collection hood 15 and the nozzle 16, which can prevent the meshes of the filter cartridge 7 from clogging. The output impurities enter the interior of the collection hood 15 and then enter the interior of the filter bag 20 through the slag discharge pipe 17.

[0033] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A mechanism for preventing bottom settling in an air jet mill, characterized in that, include: The crushing tank (1) has a funnel-shaped bottom and a support (2) is provided at the bottom end of the support (2); multiple first high-pressure nozzles (3) are installed at the bottom of the crushing tank (1) and the multiple first high-pressure nozzles (3) are arranged in a ring array; a second high-pressure nozzle (4) is also installed at the bottom end of the crushing tank (1); An intermittent feeding mechanism includes a discharge pipe (8), a first fixed plate (9), a feed pipe (10), a lower rotating plate (11), an upper rotating plate (12), a second fixed plate (21), multiple storage pipes (13), and a drive assembly for driving the lower rotating plate (11) to rotate. The first fixed plate (9) and the second fixed plate (21) are both connected to the outer wall of the crushing tank (1). The lower rotating plate (11) and the upper rotating plate (12) are rotatably connected to the first fixed plate (9) and the second fixed plate (21), respectively. Multiple storage pipes (13) are arranged in a ring array. The two ends of the storage pipes (13) pass through the lower rotating plate (11) and the upper rotating plate (12), respectively. The bottom end of the feed pipe (10) passes through the second fixed plate (21). The upper end of the discharge pipe (8) passes through the first fixed plate (9), and its lower end is connected to the inside of the crushing tank (1). The filter mechanism is installed at the top of the inner side of the pulverizing tank (1).

2. The anti-sinking mechanism for an air classifier mill according to claim 1, characterized in that, A bent pipe (6) is provided on the inner side of the crushing tank (1). The bent pipe (6) is connected to the inner wall of the crushing tank (1). A conical bucket (5) is connected to the bottom end of the bent pipe (6). The conical bucket (5) is an inverted circular funnel structure.

3. The anti-sinking mechanism for an air classifier mill according to claim 1, characterized in that, The filtration mechanism includes a filter cylinder (7), a discharge pipe (19), and a second servo motor (25). The filter cylinder (7) is located on the upper inner side of the crushing tank (1). One end of the filter cylinder (7) is connected to a rotating shaft (14). The rotating shaft (14) is rotatably installed inside the crushing tank (1). The second servo motor (25) is installed on the crushing tank (1) and its output shaft is connected to the rotating shaft (14). The discharge pipe (19) passes through the inner and outer sides of the crushing tank (1). The discharge pipe (19) is connected to the inside of the filter cylinder (7) and is rotatably connected to the filter cylinder (7).

4. The anti-sinking mechanism for an air classifier mill according to claim 3, characterized in that, It also includes an anti-clogging mechanism, which includes a collection hood (15) and a nozzle (16). The nozzle (16) and the collection hood (15) are respectively located on the inner and outer sides of the filter cylinder (7). The nozzle (16) and the collection hood (15) are respectively in contact with the inner and outer walls of the filter cylinder (7). An airflow pipe (18) is connected to the nozzle (16). The airflow pipe (18) extends through to the inner and outer sides of the discharge pipe (19). The airflow pipe (18) is fixedly connected to the crushing tank (1). A slag discharge pipe (17) is connected to the collection hood (15). A cloth bag (20) is provided at the outer end of the slag discharge pipe (17).

5. The anti-sinking mechanism for an air classifier mill according to claim 1, characterized in that, The drive assembly includes a first servo motor (22), a gear (23) and a gear ring (24). The first servo motor (22) is mounted on the crushing tank (1), the gear (23) is mounted on the output shaft of the first servo motor (22), and the gear ring (24) is located on the outer periphery of the lower rotating disk (11) and meshes with the gear (23).

6. The anti-sinking mechanism for an air classifier mill according to claim 1, characterized in that, The second high-pressure nozzle (4) sprays upwards; the multiple first high-pressure nozzles (3) spray towards the center of the inside of the pulverizing tank (1).

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