Automatic metering and packaging device for superfine powder

Abstract

The utility model discloses a superfine powder automatic metering and packaging device, including mounting panel, the top of mounting panel is provided with the weighing assembly, the top fixedly connected with support frame of weighing assembly. The utility model discloses set up weighing assembly at the top of mounting panel, has provided stable basic support for accurate metering powder weight, has guaranteed the powder weight of every packaging to meet the preset standard, has guaranteed the metering accuracy from the source, the stirring mechanism in the storage cylinder can continuously stir the powder, effectively avoids the reunion or delamination phenomenon of superfine powder because of standing, cooperates the filter screen at the bottom, can filter the possible caking or impurity, guarantees the uniformity of discharge, the screw conveying pole in the discharge pipe is driven by first motor, can realize the quantitative delivery to the powder, and the electromagnetic valve precision control of discharge opening place unloads start -stop, avoids the excessive output or drip of material, and the device has the advantages of good metering effect and good anti -clogging effect.

Description

Technical Field

[0001] This utility model relates to the field of metering and packaging technology, specifically to an automatic metering and packaging device for ultrafine powder. Background Technology

[0002] Ultrafine powders have wide applications in many industries, including chemical, pharmaceutical, and food. In the chemical industry, for example, they are used to produce high-performance materials, where the uniformity and particle size of the powder directly affect the product's performance. In the pharmaceutical industry, as active ingredients or excipients in drugs, the accuracy of measurement is crucial to drug efficacy and medication safety. Therefore, the packaging process places extremely high demands on measurement accuracy and equipment stability.

[0003] Accurate metering is crucial in the packaging process of ultrafine powders. However, due to the characteristics of ultrafine powders, such as small particle size, large specific surface area, and easy agglomeration, conventional metering devices cannot achieve accurate metering. For example, when ultrafine powders are placed in the storage cylinder, they are prone to agglomeration or stratification due to van der Waals forces between particles, electrostatic effects, or humidity. This results in uneven material entering the discharge system, which in turn causes metering deviations in the weighing components. At the same time, some devices use conveying methods such as gravity flow, which lack precise control over the discharge speed, easily leading to excessive material output or leakage, which seriously affects the consistency of packaged weight.

[0004] Meanwhile, the high adsorption and easy agglomeration of ultrafine powder pose a huge challenge to the anti-clogging design of packaging equipment. In the storage stage, ultrafine powder is easily adsorbed on the inner wall of the storage cylinder or the surface of the filter screen due to electrostatics. Long-term accumulation will cause the filter screen pores to become blocked, hindering the material from falling. The material is easy to stagnate and gradually accumulate, eventually leading to pipeline blockage and affecting the continuity of production.

[0005] Therefore, it is necessary to redesign and modify the automatic metering and packaging device for ultrafine powder to effectively prevent poor metering and anti-clogging effects. Utility Model Content

[0006] To address the problems mentioned in the background art, the purpose of this utility model is to provide an automatic metering and packaging device for ultrafine powder, which has the advantages of good metering effect and good anti-clogging effect.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an automatic metering and packaging device for ultrafine powder, comprising an installation plate, a weighing component on the top of the installation plate, a support frame fixedly connected to the top of the weighing component, a storage cylinder fixedly connected inside the support frame, a stirring mechanism inside the storage cylinder, the stirring mechanism being able to stir the powder in the storage cylinder, a filter screen fixedly connected to the lower part inside the storage cylinder, a discharge pipe connected to the bottom of the storage cylinder, a spiral conveying rod rotatably connected inside the discharge pipe, a first motor fixedly connected to the back of the discharge pipe, the output end of the first motor being fixedly connected to the spiral conveying rod, a discharge pipe connected to the front of the discharge pipe, a solenoid valve provided at the discharge port of the discharge pipe, and the discharge pipe being fixedly connected to the support frame via a bracket.

[0008] In a preferred embodiment of this invention, the stirring mechanism includes a cover plate fixedly connected to the top of the storage cylinder, a rotating shaft rotatably connected inside the cover plate, a stirring rod fixedly connected to the surface of the rotating shaft, the stirring rod being located inside the storage cylinder, and a second motor fixedly connected to the top of the cover plate, the output end of the second motor being fixedly connected to the rotating shaft.

[0009] As a preferred embodiment of this utility model, a scraper is fixedly connected to the bottom of the rotating shaft, and the scraper is respectively attached to the inner wall of the storage cylinder and the top of the filter screen.

[0010] As a preferred embodiment of this utility model, the top of the cover plate is connected to a feeding pipe, and a sealing cap is threaded onto the surface of the feeding pipe.

[0011] In a preferred embodiment of this invention, a gear ring is rotatably connected to the top of the support frame, and a third motor is fixedly connected to the top of the inner wall of the support frame. The output end of the third motor extends to the top of the support frame and is fixedly connected to a gear, which meshes with the gear ring. A plurality of first arc-shaped blocks evenly distributed in a ring are fixedly connected to the inner wall of the gear ring. A plurality of sliding grooves evenly distributed in a ring are provided on the top of the support frame. A striking frame is slidably connected inside the sliding groove. A hard rubber block is fixedly connected to one end of the striking frame near the storage cylinder. A compression spring is fixedly connected to the inner wall of the sliding groove and the side near the storage cylinder. The end of the compression spring away from the storage cylinder is fixedly connected to the striking frame. A second arc-shaped block is fixedly connected to the surface of the striking frame. The first arc-shaped block and the second arc-shaped block are used in conjunction.

[0012] As a preferred embodiment of this utility model, a bearing is fixedly connected inside the cover plate, the outer ring of the bearing is fixedly connected to the cover plate, and the inner ring of the bearing is fixedly connected to the rotating shaft.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model employs a weighing component installed on the top of the mounting plate, providing a stable foundation for accurate powder weight measurement and ensuring that the weight of powder packaged each time meets the preset standard, thus guaranteeing measurement accuracy from the source. The stirring mechanism inside the storage cylinder continuously stirs the powder, effectively preventing agglomeration or stratification of ultrafine powder due to static placement. Combined with the bottom filter screen, it removes any potential lumps or impurities, ensuring uniform discharge. The spiral conveyor rod inside the discharge pipe is driven by a first motor, enabling quantitative powder delivery. Combined with the solenoid valve at the discharge port, it precisely controls the start and stop of discharge, preventing excessive output or leakage. The entire system works collaboratively, ensuring both measurement accuracy and enhanced anti-clogging capability through a multi-layered structural design, ensuring a stable and efficient packaging process. This device possesses the advantages of excellent measurement and anti-clogging effects.

[0014] 2. This utility model uses a cover plate of the stirring mechanism fixed to the top of the storage cylinder, providing a stable fulcrum for the rotating shaft. The second motor drives the rotating shaft to rotate the stirring rod at a uniform speed inside the storage cylinder. Through continuous mechanical stirring, the accumulated ultrafine powder is fully dispersed, effectively breaking the adsorption force between powder particles and preventing clumping caused by static electricity or humidity. This uniform stirring not only improves the flowability of the powder, making the subsequent screening process through the filter screen smoother, but also ensures that the material entering the discharge pipe remains loose and uniform. This creates favorable conditions for the quantitative conveying of the screw conveyor and the accurate measurement of the weighing components, fundamentally avoiding measurement deviations caused by uneven material distribution and ensuring the consistency of packaging weight. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic cross-sectional view of the left side of the structure of the storage cylinder and discharge pipe of this utility model; Figure 3 This utility model Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 This utility model Figure 1 Enlarged schematic diagram of the structure at point B.

[0016] In the diagram: 1. Mounting plate; 2. Weighing assembly; 3. Support frame; 4. Storage cylinder; 5. Discharge pipe; 6. Outlet pipe; 7. Filter screen; 8. Cover plate; 9. Rotating shaft; 10. First motor; 11. Stirring rod; 12. Scraper frame; 13. Feeding pipe; 14. Screw conveyor rod; 15. Second motor; 16. Gear ring; 17. Third motor; 18. Gear; 19. First arc block; 20. Striking frame; 21. Compression spring; 22. Hard rubber block; 23. Second arc block. Detailed Implementation

[0017] 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, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1 to 4 As shown, an automatic metering and packaging device for ultrafine powder includes a mounting plate 1. A weighing component 2 is mounted on the top of the mounting plate 1. A support frame 3 is fixedly connected to the top of the weighing component 2. A storage cylinder 4 is fixedly connected inside the support frame 3. A stirring mechanism is installed inside the storage cylinder 4 to stir the powder inside the storage cylinder 4. A filter screen 7 is fixedly connected to the lower part of the storage cylinder 4. A discharge pipe 5 is connected to the bottom of the storage cylinder 4. A screw conveyor rod 14 is rotatably connected inside the discharge pipe 5. A first motor 10 is fixedly connected to the back of the discharge pipe 5. The output end of the first motor 10 is fixedly connected to the screw conveyor rod 14. A discharge pipe 6 is connected to the front of the discharge pipe 5. A solenoid valve is installed at the discharge port of the discharge pipe 6. The discharge pipe 5 is fixedly connected to the support frame 3 through a bracket. A controller is fixedly connected to the top of the support frame 3 to control the start and stop of various electrical appliances in the device. In actual use, the support frame will... A protective cover is installed on the top of component 3 to shield gear 18 and gear ring 16, preventing debris from adhering to the surface of the transmission components. The protective cover is not shown for ease of demonstration of the gear 18 and gear ring 16 structures. All standard parts used in this invention can be purchased from the market. Irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all use conventional models in the prior art. The circuit connections also employ conventional connection methods in the prior art, which will not be detailed here. Content not described in detail in this specification belongs to prior art known to those skilled in the art, and will not be elaborated upon in this application. The weighing component 2 can detect the mass of the powder discharged by the device, thereby achieving accurate metering and discharge. In actual use, the storage cylinder 4 is made of stainless steel with a smooth inner wall. A grounding wire is connected to the back of the storage cylinder 4, and the end of the wire away from the storage cylinder 4 is connected to the ground through a metal plug, thereby eliminating static electricity on the surface of the storage cylinder 4.

[0019] refer to Figure 2 The stirring mechanism includes a cover plate 8 fixedly connected to the top of the storage cylinder 4, a rotating shaft 9 rotatably connected inside the cover plate 8, a stirring rod 11 fixedly connected to the surface of the rotating shaft 9, the stirring rod 11 being located inside the storage cylinder 4, and a second motor 15 fixedly connected to the top of the cover plate 8, the output end of the second motor 15 being fixedly connected to the rotating shaft 9.

[0020] As a technical optimization of this utility model, the cover plate 8 of the stirring mechanism is fixed to the top of the storage cylinder 4, providing a stable rotation fulcrum for the rotating shaft 9. The second motor 15 drives the rotating shaft 9 to drive the stirring rod 11 to rotate at a uniform speed inside the storage cylinder 4. Through continuous mechanical stirring, the accumulated ultrafine powder is fully dispersed, effectively breaking the adsorption force between powder particles and preventing clumping caused by static electricity or humidity. This uniform stirring not only improves the flowability of the powder, making the subsequent screening process through the filter screen 7 smoother, but also ensures that the material entering the discharge pipe 5 always remains in a loose and uniform state. This creates favorable conditions for the quantitative conveying of the screw conveyor 14 and the accurate measurement of the weighing component 2, fundamentally avoiding measurement deviations caused by uneven material distribution and ensuring the consistency of packaging weight.

[0021] refer to Figure 2 A scraper 12 is fixedly connected to the bottom of the rotating shaft 9. The scraper 12 is attached to the inner wall of the storage cylinder 4 and the top of the filter screen 7 respectively.

[0022] As a technical optimization of this utility model, the scraper 12 at the bottom of the rotating shaft 9 is closely attached to the inner wall of the storage cylinder 4 and the top of the filter screen 7. During the operation of the stirring mechanism, it rotates synchronously with the rotating shaft 9, which can promptly remove powder residues adhering to the cylinder wall and the filter screen 7. For materials adsorbed by electrostatics or stuck by moisture, the continuous scraping of the scraper 12 can effectively prevent the filter screen 7 pores from being blocked due to long-term accumulation, ensuring that the material can smoothly pass through the filter screen 7 and enter the discharge pipe 5. At the same time, the cleaning effect of the scraper 12 on the surface of the filter screen 7 prevents residual materials from deteriorating or clumping due to long-term standing, maintains a clean environment inside the storage cylinder 4, ensures that the quality of the powder is not affected, and further improves the reliability and stability of the device in long-term use.

[0023] refer to Figure 1 The top of the cover plate 8 is connected to the feeding pipe 13, and the surface of the feeding pipe 13 is threaded with a sealing cap.

[0024] As a technical optimization of this utility model, the feeding pipe 13 at the top of the cover plate 8 provides a convenient channel for powder injection. Its pipe diameter is reasonably designed, facilitating connection to external feeding equipment or manual feeding, meeting the feeding needs of different scenarios. The threaded sealing cap can be tightly closed after feeding, effectively isolating external air and dust, preventing the powder in the storage cylinder 4 from clumping due to moisture absorption, and preventing external impurities from entering and contaminating the powder. This design ensures both high efficiency and convenience in the feeding process, and maintains a stable environment inside the storage cylinder 4 through excellent sealing, ensuring the powder remains in optimal condition during storage and mixing. This provides clean and dry material conditions for subsequent metering and packaging processes, improving the practicality and applicability of the overall device.

[0025] refer to Figure 1 A gear ring 16 is rotatably connected to the top of the support frame 3. A third motor 17 is fixedly connected to the top of the inner wall of the support frame 3. The output end of the third motor 17 extends to the top of the support frame 3 and is fixedly connected to a gear 18. The gear 18 meshes with the gear ring 16. Multiple first arc-shaped blocks 19 are fixedly connected to the inner wall of the gear ring 16 in a ring-shaped even distribution. Multiple sliding grooves are provided on the top of the support frame 3 in a ring-shaped even distribution. A striking frame 20 is slidably connected inside the sliding groove. A hard rubber block 22 is fixedly connected to one end of the striking frame 20 near the storage cylinder 4. A compression spring 21 is fixedly connected to the inner wall of the sliding groove and the side near the storage cylinder 4. One end away from the storage cylinder 4 is fixedly connected to the striking frame 20. A second arc-shaped block 23 is fixedly connected to the surface of the striking frame 20. The first arc-shaped block 19 and the second arc-shaped block 23 work together. The third motor 17 starts to work, drives the gear 18 to rotate and mesh with the gear ring 16, so that the gear ring 16 drives the first arc-shaped block 19 on the inner wall to rotate. When the first arc-shaped block 19 contacts the second arc-shaped block 23 on the striking frame 20, it pushes the striking frame 20 to slide in the groove and compresses the compression spring 21. After the two separate, the compression spring 21 resets and drives the striking frame 20 to rebound, so that the hard rubber block 22 periodically strikes the outer wall of the storage cylinder 4, shaking off the powder adhering to the cylinder wall.

[0026] As a technical optimization of this utility model, the toothed ring 16 at the top of the support frame 3 is driven to rotate by the third motor 17 through the gear 18. The first arc-shaped block 19 on the inner wall rotates with the toothed ring 16 and cooperates with the second arc-shaped block 23 on the striking frame 20, periodically pushing the striking frame 20 to slide in the groove. After compressing the compression spring 21, it is released, causing the connected hard rubber block 22 to reciprocate to strike the outer wall of the storage cylinder 4. This flexible striking method can effectively shake off the powder adhering to the cylinder wall. Combined with the internal stirring mechanism and scraper 12, it forms a double anti-sticking structure inside and outside. At the same time, the striking force is transmitted to the filter screen 7 through the cylinder wall, which can prevent fine powder from clogging the mesh and ensure smooth material feeding. Especially for highly adsorbent ultrafine powders, it significantly improves the anti-clogging ability of the device in the processing of complex materials and ensures the stability of the continuous production process.

[0027] refer to Figure 2 The cover plate 8 is internally fixedly connected to a bearing. The outer ring of the bearing is fixedly connected to the cover plate 8, and the inner ring of the bearing is fixedly connected to the rotating shaft 9.

[0028] As a technical optimization of this utility model, a bearing fixed inside the cover plate 8, with its outer ring connected to the cover plate 8 and its inner ring cooperating with the rotating shaft 9, provides high-precision rotational support for the rotating shaft 9, effectively reducing frictional resistance and radial wobble during high-speed rotation. This design makes the rotation of the stirring rod 11 more stable, reduces mechanical wear, and extends the service life of the stirring mechanism. Simultaneously, the stable support of the bearing ensures the precise fit between the scraper frame 12 and the inner wall of the storage cylinder 4 and the filter screen 7, preventing incomplete scraping or component wear caused by the shaking of the rotating shaft 9, thus ensuring the efficient realization of the stirring and scraping functions. The application of the bearing not only improves the mechanical performance of the device but also enhances the overall economy and reliability of the equipment by reducing maintenance frequency and component replacement costs.

[0029] The working principle and usage process of this utility model are as follows: Before using the automatic metering and packaging device for ultrafine powder, it is necessary to check whether the installation of each component of the equipment is stable, confirm that the weighing component 2 is horizontally installed on the top of the mounting plate 1, the support frame 3 is tightly connected to the storage cylinder 4, the discharge pipe 5 and the outlet pipe 6 are not blocked, the solenoid valve opens and closes flexibly, and the wiring of each motor is secure. Then, open the sealing cover of the feeding pipe 13 and inject the ultrafine powder to be packaged into the storage cylinder 4 through the feeding pipe 13. After feeding is completed, tighten the sealing cover to prevent external dust or moisture from entering.

[0030] After the power is turned on and the controller is connected, the second motor 15 is turned on first. Its output end drives the rotating shaft 9 to rotate, so that the stirring rod 11 continuously stirs the powder in the storage cylinder 4. The stirring speed is slow and uniform. At the same time, the scraper 12 at the bottom of the rotating shaft 9 rotates synchronously with the rotating shaft 9, adhering to the inner wall of the storage cylinder 4 and the top of the filter screen 7 to remove the attached powder residue and avoid material adhesion caused by static electricity or moisture. At the same time, the third motor 17 starts working, driving the gear 18 to rotate and mesh with the gear ring 16, causing the gear ring 16 to drive the first arc-shaped block 19 on the inner wall to rotate. When the first arc-shaped block 19 contacts the second arc-shaped block 23 on the striking frame 20, it pushes the striking frame 20 to slide in the groove and compresses the compression spring 21. After the two separate, the compression spring 21 resets and drives the striking frame 20 to rebound, causing the hard rubber block 22 to periodically strike the outer wall of the storage cylinder 4, shaking off the powder adhering to the cylinder wall. Combined with internal stirring and scraping, a double anti-sticking structure is formed inside and outside to ensure that the powder in the storage cylinder 4 remains loose and uniform.

[0031] During the mixing process, the ultrafine powder passes through the filter screen 7 to remove lumps or impurities and falls into the discharge pipe 5 below. At this time, the first motor 10 starts, driving the screw conveyor 14 to rotate, and uniformly conveying the powder in the discharge pipe 5 to the discharge pipe 6. The solenoid valve at the discharge port of the discharge pipe 6 is initially closed. Now, the solenoid valve is opened, and the ultrafine powder falls into the packaging container. At this time, the mass of the entire device decreases. When the weighing component 2 detects that the mass of the discharged material reaches the preset mass value, the controller sends a signal to close the first motor 10 and the solenoid valve, stopping the discharge; if the preset value is not reached, the operation continues and the discharge continues. Throughout the process, the weighing component 2 monitors the packaging weight in real time, providing data support for accurate measurement and ensuring that the weight of each bag of powder meets the standard. It should be noted that in actual use, an anti-vibration buffer pad is set between the weighing component 2 and the support frame 3. At the same time, the operating speed of each motor in the device is relatively slow, and each motor is equipped with a damping shock absorber during installation, thereby reducing the impact of device vibration on the weighing component 2. The third motor 17 does not run continuously, but is started when the operator finds uneven feeding speed, using knocking vibration to achieve feeding. Weighing sensors are set on the front and rear sides of both sides of the weighing component 2. The weighing sensors can weigh and support the bottom four corners of the support frame 3 to achieve uniform force and accurate data collection. At the same time, the weighing component 2 in this device has its own rubber-metal composite shock absorber pad, which can absorb the vibration generated by the motor operation. Combined with existing signal filtering algorithms, vibration interference is avoided. The aforementioned weighing component 2 is a common existing technology and is common knowledge to those skilled in the art, and will not be described in detail in this application.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic metering and packaging device for ultrafine powders, comprising a mounting plate (1), characterized in that: The top of the mounting plate (1) is provided with a weighing component (2), and the top of the weighing component (2) is fixedly connected with a support frame (3). The inside of the support frame (3) is fixedly connected with a storage cylinder (4). The inside of the storage cylinder (4) is provided with a stirring mechanism, which can stir the powder in the storage cylinder (4). The bottom of the inside of the storage cylinder (4) is fixedly connected with a filter screen (7). The bottom of the storage cylinder (4) is connected to a discharge pipe (5). The inside of the discharge pipe (5) is rotatably connected with a screw conveyor (14). The back of the discharge pipe (5) is fixedly connected with a first motor (10). The output end of the first motor (10) is fixedly connected to the screw conveyor (14). The front of the discharge pipe (5) is connected to a discharge pipe (6). A solenoid valve is provided at the discharge port of the discharge pipe (6). The discharge pipe (5) is fixedly connected to the support frame (3) through a bracket.

2. A device for automatic metering and packaging of superfine powders according to claim 1, characterized in that: The stirring mechanism includes a cover plate (8) fixedly connected to the top of the storage cylinder (4), a rotating shaft (9) is rotatably connected inside the cover plate (8), a stirring rod (11) is fixedly connected to the surface of the rotating shaft (9), the stirring rod (11) is located inside the storage cylinder (4), a second motor (15) is fixedly connected to the top of the cover plate (8), and the output end of the second motor (15) is fixedly connected to the rotating shaft (9).

3. A device for automatic metering and packaging of superfine powders according to claim 2, characterized in that: The bottom of the rotating shaft (9) is fixedly connected to a scraper (12), which is attached to the inner wall of the storage cylinder (4) and the top of the filter screen (7).

4. A device for automatic metering and packaging of superfine powders according to claim 3, characterized in that: The top of the cover plate (8) is connected to a feeding pipe (13), and a sealing cap is threaded onto the surface of the feeding pipe (13).

5. A device for automatic metering and packaging of superfine powders according to claim 4, characterized in that: A gear ring (16) is rotatably connected to the top of the support frame (3). A third motor (17) is fixedly connected to the top of the inner wall of the support frame (3). The output end of the third motor (17) extends to the top of the support frame (3) and is fixedly connected to a gear (18). The gear (18) meshes with the gear ring (16). A plurality of first arc-shaped blocks (19) are fixedly connected to the inner wall of the gear ring (16) in a ring-shaped uniform distribution. A plurality of sliding blocks are provided on the top of the support frame (3) in a ring-shaped uniform distribution. The groove has a slidably connected striking frame (20) inside. A hard rubber block (22) is fixedly connected to one end of the striking frame (20) near the storage cylinder (4). A compression spring (21) is fixedly connected to the inner wall of the groove and the side near the storage cylinder (4). The end of the compression spring (21) away from the storage cylinder (4) is fixedly connected to the striking frame (20). A second arc-shaped block (23) is fixedly connected to the surface of the striking frame (20). The first arc-shaped block (19) and the second arc-shaped block (23) are used together.

6. A device for automatic metering and packaging of superfine powders according to claim 5, characterized in that: The cover plate (8) is internally fixedly connected to a bearing, the outer ring of the bearing is fixedly connected to the cover plate (8), and the inner ring of the bearing is fixedly connected to the rotating shaft (9).

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