Volume metering and dispensing device for powder medicaments

Abstract

The application discloses a volume metering and sub-packaging device for powder medicine, which comprises a base, a hopper, a metering assembly, a sub-packaging assembly and a positive and negative pressure switching assembly. The cylindrical metering assembly is horizontally arranged below a discharge port of the hopper, and both ends of the metering assembly are rotatably connected to the base. A plurality of metering pits are arranged on the outer side of the metering assembly, and a gas passage is arranged in the metering assembly and communicates with the metering pits. When the metering pit communicates with a feeder, an exhaust port of the positive and negative pressure switching assembly communicates with the gas passage. When the metering pit is located at other positions, an air inlet of the positive and negative pressure switching assembly communicates with the gas passage. The metering pit is kept in a negative pressure state when not communicating with the sub-packaging assembly by the positive and negative pressure switching assembly, so that the powder can be adsorbed in the metering pit. The volume of the metering pit is used to control the sub-packaging volume of the powder, and the sub-packaging amount of the powder can be accurately controlled.

Description

Technical Field

[0001] This invention relates to the field of powder dispensing technology, and more specifically to a volume metering and dispensing device for powdered drugs. Background Technology

[0002] Currently, in the pharmaceutical or chemical industry, powder dispensing mainly relies on valve switching to control the amount of powder dispensed. The amount of powder discharged is controlled by controlling the valve opening time. However, the dispensing volume is unstable due to factors such as powder flowability, resulting in large errors. This is especially true for some target filling volumes at the milligram level, which cannot meet the requirements. Summary of the Invention

[0003] The technical problem to be solved by the present invention is the insufficient accuracy of controlling the filling amount of powder through valves. The purpose is to provide a volume metering and dispensing device for powdered drugs, which solves the problem of high-precision powder filling accuracy.

[0004] This invention is achieved through the following technical solution:

[0005] A volumetric metering and dispensing device for powdered drugs, comprising:

[0006] Base;

[0007] A hopper containing powder to be dispensed, with a discharge port located at the bottom of the hopper;

[0008] A cylindrical metering component is horizontally positioned below the discharge port of the hopper, with its outer surface tangent to the discharge port. Both ends of the metering component are rotatably connected to the base. The outer surface of the metering component is provided with multiple metering pits, and the inside of the metering component is provided with air passages communicating with the metering pits.

[0009] A rotation drive assembly has its torque output shaft fixedly connected to the first end of the metering assembly, and drives the metering assembly to rotate along its central axis;

[0010] The dispensing component is located below the metering component, and a feeder corresponding to the metering pit is located above the dispensing component.

[0011] The positive and negative pressure switching component has an air intake port and an air exhaust port. When the metering pit is connected to the feeder, the air exhaust port of the positive and negative pressure switching component is connected to the air passage. When the metering pit is located in other positions, the air intake port of the positive and negative pressure switching component is connected to the air passage.

[0012] Specifically, the metering component includes:

[0013] A rotating drum is horizontally positioned below the discharge port of the hopper, and the first end of the rotating drum is fixedly connected to the torque output shaft of the rotation drive assembly. The air passage is located inside the rotating drum, and the opening end of the air passage is connected to the second end face of the rotating drum.

[0014] An outer cylinder is fitted onto the rotating drum and is coaxially arranged with the rotating drum. A plurality of metering pits are arranged on the outer cylinder and penetrate the inner and outer sides of the outer cylinder. The outer side of the outer cylinder is tangent to the discharge port.

[0015] A filter cartridge is fixedly disposed between the outer side of the rotating drum and the inner side of the outer cylinder, with the inner side of the filter cartridge in contact with the outer side of the rotating drum and the outer side of the filter cartridge in contact with the inner side of the outer cylinder. The filter pore diameter of the filter cartridge is smaller than the diameter of the powder.

[0016] Specifically, the discharge port includes:

[0017] Two straight edges parallel to the central axis of the outer cylinder;

[0018] Two concentric arc edges on the central axis of the outer cylinder;

[0019] The straight edge and the arc edge are connected end to end, and there is a gap between the straight edge and the arc edge and the outer surface of the outer cylinder, and the gap is smaller than the diameter of the powder.

[0020] Preferably, the rotation drive assembly is a servo motor, and its torque output shaft is fixedly connected to the first end of the drum via a gearbox.

[0021] Specifically, the packaging assembly includes:

[0022] The feeder, a plurality of the feeders are arranged in a straight line and located directly below the central axis of the metering component. The feeder has an inlet and an outlet, and the inlet of the feeder is tangent to the outer cylinder.

[0023] The product dispensing station is located directly below the outlet of the feeder, and the product dispensing station is equipped with inner product packaging.

[0024] In a preferred embodiment, the multiple metering pits are divided into multiple groups, and the multiple metering pits in the same group are arranged in a straight line and parallel to the central axis of the metering component.

[0025] The multiple sets of metering pits are distributed in a ring along the central axis of the outer cylinder;

[0026] The number of air channels is equal to the number of groups of metering pits, and multiple air channels are set up one-to-one with multiple groups of metering pits and are connected.

[0027] Specifically, the positive and negative pressure switching component includes:

[0028] A sealing block is fixedly connected to the base, and the sealing surface of the sealing block is dynamically sealed to the second end face of the drum. The sealing block is provided with an air intake port and an air exhaust port.

[0029] When a group of metering pits is located directly above the feeder, the opening end of the air passage connected to the group of metering pits is connected to the exhaust port.

[0030] The opening ends of the air passages corresponding to the metering pits in the remaining groups are all connected to the air intake.

[0031] Furthermore, the positive and negative pressure switching component also includes:

[0032] A suction pipe that connects the suction port to the vacuum pump;

[0033] An exhaust pipe that connects the exhaust port to the air pump.

[0034] Preferably, the line connecting the metering pit and its corresponding air passage coincides with the radius of the metering component;

[0035] The distances between the multiple air passages and the central axis of the drum are all equal.

[0036] Specifically, the exhaust port includes:

[0037] An exhaust port is connected to the exhaust pipe, the exhaust port is located directly above the feeder, and the exhaust port is connected to the opening end of the air passage located directly above the feeder;

[0038] The air intake includes:

[0039] An arc-shaped air intake groove is provided on the sealing surface of the sealing block, and the radius of the arc-shaped air intake groove is equal to the distance between the air passage and the central axis of the drum. The two ends of the arc-shaped air intake groove are respectively located on both sides of the exhaust hole and are not connected to the exhaust hole.

[0040] The air intake hole is connected to the arc-shaped air intake groove.

[0041] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0042] The present invention provides a rotatable metering component below the hopper and a metering pit for measuring the volume of powder on the metering component. The positive and negative pressure switching component keeps the metering pit in a negative pressure state when it is not connected to the dispensing component, so that the powder can be adsorbed in the metering pit.

[0043] The positive and negative pressure switching component ensures a positive pressure state when the metering pit is connected to the dispensing component, so that the powder can be discharged from the metering pit to the dispensing component for dispensing.

[0044] This invention controls the volume of powder dispensing by measuring the volume of the metering pit, thus enabling precise control of the amount of powder dispensed. Attached Figure Description

[0045] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the invention. These drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, but do not constitute a limitation on the embodiments of the present invention.

[0046] Figure 1 This is a schematic diagram of the structure of the volume metering and dispensing device for powdered drugs according to the present invention.

[0047] Figure 2 This is an axial sectional view of the metering component according to the present invention.

[0048] Figure 3 This is a radial cross-sectional view of the metering component according to the present invention.

[0049] Figure 4 This is a schematic diagram of the sealing block structure according to the present invention.

[0050] Attached reference numerals: 1-hopper, 2-metering component, 3-dispensing component, 4-inlet, 5-outlet, 6-base, 7-sealing block, 100-powder;

[0051] 21-Metering pit, 211-First group, 212-Second group, 213-Third group, 214-Fourth group, 22-Drum, 23-Filter cylinder, 24-Outer cylinder, 25-Air passage, 31-Feeder, 71-Arc-shaped air intake groove, 72-Exhaust hole. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0053] It should also be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] Where there is no conflict, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0057] Example 1

[0058] like Figure 1 As shown, this embodiment provides a volume metering and dispensing device for powdered drugs, including a base 6, a hopper 1, a metering component 2, a dispensing component 3, and a positive and negative pressure switching component.

[0059] The function of base 6 is to support the entire packaging device. The structure of base 6 can be modified according to specific circumstances, as long as it has the supporting function.

[0060] The hopper 1 contains powder 100 to be packaged. The hopper 1 has a discharge port at the bottom. The function of the hopper 1 is to store the powder 100. The hopper 1 is shaped like a bucket. The material is added from the large opening at the top or side and goes out through the small opening at the bottom (discharge port).

[0061] The cylindrical metering component 2 is horizontally positioned below the discharge port of the hopper 1, and the outer surface of the metering component 2 is tangent to the discharge port. A certain gap is maintained between the discharge port and the outer circumferential surface of the metering component 2, thereby ensuring that the powder 100 will not leak from the metering component 2 and the discharge port, and will not generate friction between the hopper 1 and the metering component 2.

[0062] The dispensing component 3 is located below the metering component 2, and a feeder 31 corresponding to the metering pit 21 is located above the dispensing component 3.

[0063] The outer side of the metering component 2 is provided with multiple metering pits 21. The two ends of the metering component 2 are rotatably connected to the base 6. The torque output shaft of the rotation drive component is fixedly connected to the first end of the metering component 2 and drives the metering component 2 to rotate along its central axis. The rotation drive component drives the metering component 2 to rotate between the bottom of the discharge port and the top of the feeder 31.

[0064] When the metering pit 21 is below the discharge port, the powder 100 in the hopper 1 enters the metering pit 21 for filling. Then the metering component 2 rotates. When the metering pit 21 rotates to the top of the dispensing component 3, the powder 100 is discharged from the metering pit 21 and falls into the dispensing component 3 to achieve dispensing.

[0065] To prevent powder 100 from falling out of metering pit 21 during the rotation of metering component 2, an air passage 25 communicating with metering pit 21 is provided inside metering component 2, and the air passage 25 is used in conjunction with positive and negative pressure switching component.

[0066] The positive and negative pressure switching component has an air intake port 4 and an exhaust port 5. When the metering pit 21 is connected to the feeder 31, the exhaust port 5 of the positive and negative pressure switching component is connected to the air passage 25. At this time, the metering pit 21 is in a positive pressure state, and the powder 100 in the metering pit 21 can be discharged by airflow.

[0067] When the metering pit 21 is in other positions, the air inlet 4 of the positive and negative pressure switching component is connected to the air passage 25. The air inlet 4 makes the inside of the metering pit 21 in other positions negative pressure, which can adsorb the powder 100 in the metering pit 21 and prevent it from falling out of the metering pit 21.

[0068] Example 2

[0069] like Figure 2 and Figure 3 As shown in the figure, this embodiment describes the specific structure of the metering component 2. The metering component 2 includes a rotating drum 22, a filter cylinder 23, and an outer cylinder 24. The rotating drum 22, the filter cylinder 23, and the outer cylinder 24 are fixedly connected in sequence from the inside to the outside.

[0070] The rotating drum 22 is horizontally positioned below the discharge port of the hopper 1, and the first end of the rotating drum 22 is fixedly connected to the torque output shaft of the rotation drive assembly. The air passage 25 is positioned inside the rotating drum 22, and the open end of the air passage 25 is connected to the second end face of the rotating drum 22. That is, the horizontally positioned air passage 25 also has two ends. The first end of the air passage 25 is not connected to the first end face of the rotating drum 22, and the second end (open end) of the air passage 25 is connected to the second end face of the rotating drum 22.

[0071] The outer cylinder 24 is fitted onto the rotating drum 22, and the outer cylinder 24 and the rotating drum 22 are coaxially arranged. Multiple metering pits 21 are arranged on the outer cylinder 24 and penetrate through the inner and outer sides of the outer cylinder 24. The outer side of the outer cylinder 24 is tangent to the discharge port. The metering pit 21 is a through hole arranged on the outer cylinder 24 and is connected to the corresponding air passage 25.

[0072] The filter cartridge 23 is fixedly disposed between the outer side of the drum 22 and the inner side of the outer cylinder 24, with the inner side of the filter cartridge 23 in contact with the outer side of the drum 22 and the outer side of the filter cartridge 23 in contact with the inner side of the outer cylinder 24. The filter pore diameter of the filter cartridge 23 is smaller than the diameter of the powder 100. Airflow can pass through the filter cartridge 23, but the powder 100 cannot pass through the filter cartridge 23, thereby preventing the powder 100 from being sucked away by the positive and negative pressure switching component.

[0073] To accommodate the tangential relationship between the outer cylinder 24 and the material cylinder, the discharge port in this embodiment includes two straight edges and two curved edges, and its projection on the horizontal plane is a rectangular structure.

[0074] Two straight edges parallel to the central axis of the outer cylinder 24, and two arc edges concentric with the central axis of the outer cylinder 24, with the straight edges and arc edges connected end to end, and a gap is provided between the straight edges and arc edges and the outer surface of the outer cylinder 24, and the gap is smaller than the diameter of the powder 100, that is, the gap is less than 1mm.

[0075] Example 3

[0076] This embodiment describes the structure of the rotation drive assembly and the sub-assembly assembly 3.

[0077] The rotation drive component is a servo motor, and the torque output shaft of the servo motor is fixedly connected to the first end of the drum 22 through a gearbox.

[0078] The packaging component 3 includes a feeder 31 and a product packaging position.

[0079] The feeder 31 has an inlet and an outlet. The inlet of the feeder 31 is tangent to the outer cylinder 24. The feeder 31 has a funnel structure that is larger at the top and smaller at the bottom. The upper end of the feeder 31 can be tangent to the outer side of the outer cylinder 24 (the principle is similar to the discharge port). The lower end of the feeder 31 is connected to the inner packaging of the product (such as capsules).

[0080] Multiple feeders 31 are arranged in a straight line and located directly below the central axis of the metering component 2. By setting multiple feeders 31, the inner packaging of multiple products can be completed simultaneously.

[0081] The product dispensing position is located directly below the outlet of the feeder 31, and the product dispensing position is equipped with product inner packaging. It can adopt the conventional technology at present. At present, the product dispensing position is filled by controlling the valve. In this embodiment, the metering component 2 is used to realize the metering of the product dispensing position.

[0082] Example 4

[0083] In addition, to achieve synchronous movement of the inner packaging of the product at the product dispensing position, this embodiment divides the multiple metering pits 21 into multiple groups (e.g., Figure 3 The four groups in the model can actually be more than four groups, such as six, eight, or twelve. Multiple metering pits 21 in the same group are arranged in a straight line and are set parallel to the central axis of the metering component 2.

[0084] Multiple sets of metering pits 21 are distributed in a ring along the central axis of the outer cylinder 24;

[0085] The number of air passages 25 is equal to the number of groups of metering pits 21, and multiple air passages 25 are set up one-to-one with multiple groups of metering pits 21 and are connected.

[0086] To facilitate the description of the working principle, according to Figure 3 The markings in the text divide the multiple groups of measuring pits 21 into the first group 211, the second group 212, the third group 213, and the fourth group 214.

[0087] The positive and negative pressure switching assembly includes a sealing block 7, an intake pipe, and an exhaust pipe.

[0088] like Figure 4 As shown, the sealing block 7 is fixedly connected to the base 6, and the sealing surface of the sealing block 7 is dynamically sealed to the second end face of the drum 22. The sealing block 7 is provided with an air intake 4 and an exhaust port 5.

[0089] When a certain group (third group 213) metering pit 21 is located directly above the feeder 31, the opening end of the air passage 25 connected to the metering pit 21 is connected to the exhaust port 5.

[0090] The opening ends of the air passages 25 corresponding to the metering pits 21 in the other groups (Group 1 211, Group 212, Group 4 214) are all connected to the air inlet 4.

[0091] The suction pipe connects the suction port 4 to the vacuum pump, which is used to provide negative pressure to the metering pit 21, thereby achieving the purpose of adsorbing the powder 100 into the metering pit 21.

[0092] The exhaust pipe connects the exhaust port 5 to the air pump, which provides positive pressure to the metering pit 21, thereby achieving the purpose of discharging the powder 100 from the metering pit 21.

[0093] In order to achieve the above positive and negative pressure operations.

[0094] like Figure 3 As shown, the line connecting the metering pit 21 and its corresponding air passage 25 coincides with the radius of the metering component 2; the distances between the multiple air passages 25 and the central axis of the drum 22 are all equal.

[0095] The exhaust port 5 includes an exhaust hole 72 that communicates with the exhaust pipe. The exhaust hole 72 is located directly above the feeder 31 and is connected to the opening end of the air passage 25 (corresponding to the third group 213) located directly above the feeder 31.

[0096] The air intake 4 includes an arc-shaped air intake groove 71 and an air intake hole, which connects the arc-shaped air intake groove 71 and the vacuum pump.

[0097] The arc-shaped suction groove 71 is provided on the sealing surface of the sealing block 7, and the radius of the arc-shaped suction groove 71 is equal to the distance between the air passage 25 and the central axis of the drum 22. The two ends of the arc-shaped suction groove 71 are located on both sides of the exhaust hole 72, and are not connected to the exhaust hole 72.

[0098] The remaining first group 211, second group 212 and fourth group 214 are all connected to the arc-shaped suction groove 71, continuously providing negative pressure to the metering pit 21 except for the third group 213, so that the powder 100 can be adsorbed in the metering pit 21 and prevented from falling off.

[0099] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0100] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0101] Those skilled in the art should understand that the above embodiments are merely for illustrating the present invention and are not intended to limit the scope of the invention. Those skilled in the art can make other changes or modifications based on the above invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A volumetric metering and dispensing device for powdered drugs, characterized in that, include: Base (6); A hopper (1) is provided with powder (100) to be dispensed inside, and a discharge port is provided at the bottom of the hopper (1). A cylindrical metering component (2) is horizontally positioned below the discharge port of the hopper (1), with its outer surface tangent to the discharge port. Both ends of the metering component (2) are rotatably connected to the base (6). The outer surface of the metering component (2) is provided with multiple metering pits (21), and the inside of the metering component (2) is provided with air passages (25) communicating with the metering pits (21). The multiple metering pits (21) are divided into multiple groups, and the multiple metering pits (21) in the same group are arranged in a straight line and are arranged parallel to the central axis of the metering component (2). The number of air passages (25) is equal to the number of groups of metering pits (21), and the multiple air passages (25) are arranged and communicate with the multiple groups of metering pits (21) one by one. The rotation drive assembly has its torque output shaft fixedly connected to the first end of the metering assembly (2) and drives the metering assembly (2) to rotate along its central axis; The dispensing component (3) is disposed below the metering component (2), and a feeder (31) corresponding to the metering pit (21) is disposed above the dispensing component (3); The positive and negative pressure switching component has an air intake (4) and an exhaust (5). When the metering pit (21) is connected to the feeder (31), the exhaust (5) of the positive and negative pressure switching component is connected to the air passage (25); when the metering pit (21) is in other positions, the air intake (4) of the positive and negative pressure switching component is connected to the air passage (25). The metering component (2) includes: A rotating drum (22) is horizontally positioned below the discharge port of the hopper (1), and the first end of the rotating drum (22) is fixedly connected to the torque output shaft of the rotating drive assembly. An air passage (25) is located inside the rotating drum (22), and the opening end of the air passage (25) is connected to the second end face of the rotating drum (22). An outer cylinder (24) is fitted onto the rotating drum (22), and the outer cylinder (24) is coaxially arranged with the rotating drum (22). Multiple metering pits (21) are arranged on the outer cylinder (24). Multiple sets of metering pits (21) are distributed in a ring along the central axis of the outer cylinder (24) and penetrate the inner and outer sides of the outer cylinder (24). The outer side of the outer cylinder (24) is tangent to the discharge port. A filter cylinder (23) is fixedly disposed between the outer side of the drum (22) and the inner side of the outer cylinder (24), and the inner side of the filter cylinder (23) is in contact with the outer side of the drum (22), and the outer side of the filter cylinder (23) is in contact with the inner side of the outer cylinder (24). The filter hole diameter of the filter cylinder (23) is smaller than the diameter of the powder (100). The positive and negative pressure switching component includes: A sealing block (7) is fixedly connected to the base (6), and the sealing surface of the sealing block (7) is dynamically sealed to the second end face of the drum (22). The sealing block (7) is provided with an air intake (4) and an exhaust port (5). When a certain group of metering pits (21) is located directly above the feeder (31), the opening end of the air passage (25) connected to the metering pit (21) of that group is connected to the exhaust port (5); the opening ends of the air passages (25) corresponding to the metering pits (21) of the other groups are all connected to the air intake port (4). The suction pipe connects the suction port (4) to the vacuum pump; An exhaust pipe that connects the exhaust port (5) to the air pump; The exhaust port (5) includes: An exhaust port (72) is connected to the exhaust pipe. The exhaust port (72) is located directly above the feeder (31), and the exhaust port (72) is connected to the opening end of the air passage (25) located directly above the feeder (31). The air intake (4) includes: An arc-shaped suction groove (71) is provided on the sealing surface of the sealing block (7), and the radius of the arc-shaped suction groove (71) is equal to the distance between the air passage (25) and the central axis of the drum (22). The two ends of the arc-shaped suction groove (71) are located on both sides of the exhaust hole (72) and are not connected to the exhaust hole (72). The air intake hole is connected to the arc-shaped air intake groove (71).

2. The volumetric metering and dispensing device for powdered drugs according to claim 1, characterized in that, The discharge port includes: Two straight edges parallel to the central axis of the outer cylinder (24); Two concentric arc edges of the outer cylinder (24); The straight edge and the arc edge are connected end to end, and a gap is provided between the straight edge and the arc edge and the outer side surface of the outer cylinder (24), and the gap is smaller than the diameter of the powder (100).

3. The volume metering and dispensing device for powdered drugs according to claim 1, characterized in that, The rotation drive assembly is a servo motor, and its torque output shaft is fixedly connected to the first end of the drum (22) through a gearbox.

4. The volume metering and dispensing device for powdered drugs according to claim 1, characterized in that, The packaging component (3) includes: The feeder (31) is arranged in a straight line and located directly below the central axis of the metering component (2). The feeder (31) has an inlet and an outlet. The inlet of the feeder (31) is tangent to the outer cylinder (24). The product dispensing station is located directly below the outlet of the feeder (31), and the product dispensing station is provided with product inner packaging.

5. The volumetric metering and dispensing device for powdered drugs according to claim 1, characterized in that, The line connecting the metering pit (21) and its corresponding air passage (25) coincides with the radius of the metering component (2); The distances between the multiple air passages (25) and the central axis of the drum (22) are all equal.

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