Medicinal powder filling machine and filling method thereof

Abstract

A medicine powder filling machine comprises a rack, a conveying belt and a filling part, the filling part comprises a filling head and a powder feeding mechanism, and a sealing anti-escape unit is arranged on the filling head; the sealing anti-escape unit comprises a negative pressure sleeve, a flexible sealing ring piece and a negative pressure source connected with the negative pressure sleeve, the negative pressure sleeve and the outer wall of the filling head form a negative pressure cavity, the flexible sealing ring piece is arranged on the outer side of the lower portion of the filling head in a sleeving mode, the inner wall of the flexible sealing ring piece and the outer wall of the filling head form a medicine powder feeding cavity, and the negative pressure cavity communicates with the medicine powder feeding cavity; the material distributing part comprises a bottom plate and a material distributing disc which is coaxial with the bottom plate and is rotationally arranged on the bottom plate; and the medicine tank lifting part is located below the material distribution disc and corresponds to one station of the material distribution disc. During filling, a negative pressure environment is generated through the negative pressure source, dust possibly raised can be sucked in time, medicine powder is prevented from escaping from a tank opening gap, waste of materials is reduced, especially for high-added-value medicine, the medicine powder is prevented from polluting the surface of equipment and the working environment, and the burden of cleaning and maintenance is relieved.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical powder filling machine technology, specifically to a pharmaceutical powder filling machine and its filling method. Background Technology

[0002] Existing powder filling equipment typically operates as follows: an empty medicine tank is intermittently moved to the filling station by a conveyor belt and stops directly below the fixed filling head. The filling valve is opened, and the powder falls into the medicine tank through the filling port under the action of gravity or a forced feeding mechanism. After filling is completed, the medicine tank moves with the conveyor belt to the next process, such as capping or sealing.

[0003] There is usually a certain gap between the lower end face of the filling port and the upper end face of the medicine bottle opening. For example, in a powder filling machine with patent number CN115352722B, the height of the filling section remains unchanged. The bottle is moved to the bottom of the filling section by the distribution plate to complete the filling. There is a large gap between the filling section and the bottle. When filling under this gap, the falling powder will impact the bottom of the can and raise dust. Some fine powder will escape from the gap with the turbulent airflow inside the can, causing the powder to scatter and resulting in direct waste of materials. This is especially true for high-value-added medicines, which increases production costs. Furthermore, the scattered powder can contaminate the equipment surface and the working environment, increasing the burden of cleaning and maintenance. Summary of the Invention

[0004] To address the technical problems existing in the background art described above, the present invention provides a powder filling machine and a filling method thereof.

[0005] The technical solution of this invention is as follows: A powder filling machine, comprising: frame; The conveyor belt, mounted on the frame, has a feeding end and a discharging end. The feeding end is connected to an external feeding device, and the discharging end is connected to an external discharging device. The filling unit, located on the upper part of the frame, is capable of filling medicine powder into medicine tanks conveyed by the conveyor belt. It includes a filling head and a powder feeding mechanism. The filling head is equipped with a sealing and anti-escape unit. The sealing and anti-escape unit includes a negative pressure sleeve, a flexible sealing ring, and a negative pressure source connected to the negative pressure sleeve. The negative pressure sleeve and the outer wall of the filling head form a negative pressure cavity. The flexible sealing ring is sleeved on the lower outer side of the filling head, with its lower end face located below the filling head. The inner wall of the flexible sealing ring and the outer wall of the filling head form a medicine powder dispensing cavity. The negative pressure cavity is connected to the medicine powder dispensing cavity. The material distribution section includes a base plate and a material distribution plate coaxial with and rotatably mounted on it. The base plate is flush with the upper end face of the conveyor belt. The edge of the material distribution plate is provided with multiple stations for accommodating medicine tanks. Each station is a through-hole accommodating hole with an opening on the outside. The medicine tank lifting unit is located below the dispensing tray and is set at one station corresponding to the dispensing tray. It is used to lift the medicine tank to contact the inner wall of the flexible sealing ring during filling. The medicine tank lifting unit includes a circular lifting plate and a lifting mechanism connected thereto. The axis of the lifting plate is coaxial with the axis of the filling head. The can opening sealing part is located above the dispensing tray, corresponding to one station of the dispensing tray, and is used to seal the can opening of the filled medicine can.

[0006] Furthermore, the lower end of the negative pressure sleeve is provided with an annular plate, the inner wall of which is sealed to the outer wall of the filling head, and the annular plate is provided with multiple through holes along its circumference.

[0007] The specific structure of the flexible sealing ring is as follows: the flexible sealing ring includes a rigid sleeve and an annular airbag inside it. The annular airbag is adapted to the sleeve. The annular airbag is connected to an external inflation / deflation device through an inflation / deflation pipe with an electric switch. The upper part of the rigid sleeve is connected to an annular plate. The electric switch and the inflation / deflation device are electrically connected to the control module respectively.

[0008] Furthermore, the inner wall of the annular airbag is provided with an inclined downward annular baffle. The annular baffle can cooperate with the lower part of the annular airbag to lock onto the mouth of the medicine can, preventing the medicine powder from falling between the inner wall of the lower part of the annular airbag and the outer wall of the mouth of the medicine can, thus avoiding waste of medicine powder.

[0009] Preferably, the width of the lower part of the rigid sleeve decreases from top to bottom, and the inner diameter of the lower end of the rigid sleeve is larger than the outer diameter of the mouth of the medicine container.

[0010] The installation structure of the flexible sealing ring and the annular plate is as follows: an outer ring plate and an inner ring plate with different inner diameters are provided below the annular plate. The inner wall of the outer ring plate and the outer wall of the inner ring plate form the installation position for installing the flexible sealing ring. One side of the rigid sleeve is connected to the inner wall of the outer ring plate, and the upper part of the annular airbag abuts against the outer wall of the inner ring plate.

[0011] Furthermore, the through hole is a tapered hole, with its inner diameter increasing from top to bottom.

[0012] Preferably, the lower end of the inner ring plate is provided with an annular protective plate coaxial with it. The cross-section of the annular protective plate is an arc-shaped surface, and the minimum vertical distance between the annular protective plate and the axis of the filling head is greater than the maximum vertical distance between the through hole and the axis of the filling head.

[0013] The filling method using the above-mentioned powder filling machine includes the following steps: S1. Feeding and Positioning The conveyor belt intermittently transports empty medicine tanks to the distribution plate station, where the distribution plate straightens and initially positions the medicine tanks. S2. The dispensing plate rotates at a preset angle, moving the medicine tank to the filling position of the corresponding lifting plate, with the medicine tank located directly below the filling head; S3. Start the negative pressure source and simultaneously start the inflation / deflation device to inflate the annular airbag; S4. Lifting and sealing; The lifting mechanism drives the lifting plate to rise, lifting the medicine container so that its mouth contacts the annular airbag of the sealing and anti-escape unit and generates compression deformation; S5, Powder Filling Open the filling valve on the filling head and fill with the powder; S6. Depressurization and Reset After the powder filling is completed, control the inflation and deflation equipment to deflate the annular airbag, and control the lifting mechanism to drive the lifting plate down to be flush with the upper surface of the base plate. S7, Can opening seal Control the rotation of the dispensing disc to move the filled medicine can to the can opening sealing part for sealing; S8. After the medicine container is sealed, the distribution plate rotates and moves the sealed medicine container to the discharge end of the conveyor belt for discharge. At the same time, a new empty medicine container is sent from the previous station to the filling station. Steps S2 to S8 are repeated to achieve continuous cyclic filling.

[0014] The beneficial effects of this invention are as follows: The negative pressure cavity formed by the negative pressure sleeve and the outer wall of the filling head, as well as the powder dispensing cavity formed by the inner wall of the flexible sealing ring and the outer wall of the filling head, are interconnected. During filling, a negative pressure environment is generated by the negative pressure source, which can promptly suck up any dust that may be stirred up, preventing the powder from escaping from the gap at the can opening. This not only reduces material waste, especially for high-value-added drugs, thus lowering production costs, but also avoids powder contamination of the equipment surface and working environment, reducing the burden of cleaning and maintenance.

[0015] During the filling process, the annular airbag, after being inflated, comes into close contact with the can opening, forming a reliable seal that effectively prevents the medicine powder from spilling out. The annular airbag can also be flexibly inflated or deflated according to the size of the can opening, making it suitable for filling cans of different sizes. At the same time, the downward-sloping annular baffle on the inner wall of the annular airbag can further prevent medicine powder from falling into the gap between the lower part of the annular airbag and the outer wall of the can opening, avoiding secondary waste and improving the stability and integrity of the sealing effect. Attached Figure Description

[0016] In the attached diagram: Figure 1 This is a schematic diagram of the first structure; Figure 2 This is a top view; Figure 3 for Figure 2 A schematic diagram of the AA-direction cross-section structure; Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the second structure; Figure 6 for Figure 5 Enlarged structural diagram at point B; The components represented by the various reference numerals in the diagram are: 1. Frame; 2. Conveyor belt; 21. Feeding end; 22. Discharge end; 3. Filling section; 31. Filling head; 32. Powder feeding mechanism; 4. Sealing and anti-escape unit; 41. Negative pressure sleeve; 42. Flexible sealing ring; 421. Rigid sleeve; 422. Annular airbag; 423. Inflation and deflation pipe; 424. Annular baffle; 43. Negative pressure source pipe; 44. Negative pressure chamber; 45. Powder dispensing chamber; 5. Distributing section; 51. Base plate; 511. Through hole; 52. Distributing plate; 521. Station; 53. Rotary drive motor; 54. Arc-shaped baffle; 6. Medicine tank lifting section; 61. Lifting plate; 62. Lifting mechanism; 7. Tank opening sealing section; 8. Annular plate; 81. Through hole; 9. Outer ring plate; 10. Inner ring plate; 101. Annular protective plate; 11. Medicine tank. Detailed Implementation

[0017] See Figure 1 , Figure 2 and Figure 3 As shown, a powder filling machine includes a frame 1 and a conveyor belt 2, a filling section 3, a dispensing section 5, a medicine tank lifting section 6, and a tank opening sealing section 7 mounted thereon.

[0018] The conveyor belt 2 is horizontally mounted on the frame 1 and has a feeding end 21 and a discharging end 22. The feeding end 21 is connected to an external feeding device, and the discharging end 22 is connected to an external discharging device. It is used to transport empty medicine tanks 11 and filled medicine tanks 11 to a designated location.

[0019] See Figure 4 As shown, the filling section 3 is located on the upper part of the frame 1, above the conveyor belt 2, and is capable of filling the medicine tank 11 conveyed by the conveyor belt 2 with medicine powder. It includes a filling head 31 and a powder feeding mechanism 32. The filling head 31 is equipped with a sealing and anti-escape unit 4. The sealing and anti-escape unit 4 includes a negative pressure sleeve 41, a flexible sealing ring 42, and a negative pressure source connected to the negative pressure sleeve 41. The upper part of the negative pressure sleeve 41 is provided with a cover plate. The negative pressure sleeve 41 and the outer wall of the filling head 31 form a sealed negative pressure cavity 44. The flexible sealing ring 42 is sleeved on the lower outer side of the filling head 31, and its lower end face is located below the filling head 31. The inner wall of the flexible sealing ring 42 and the outer wall of the filling head 31 form a medicine powder delivery cavity 45. The negative pressure cavity 44 is connected to the medicine powder delivery cavity 45. During filling, a negative pressure environment is generated by the negative pressure source, which can timely suck up any dust that may be raised and prevent the medicine powder from escaping from the gap at the can opening. The negative pressure source is connected to the negative pressure chamber 44 through the negative pressure source pipe 43.

[0020] See Figure 5 and Figure 6 As shown, the material distribution section 5 includes a base plate 51 and a material distribution disk 52 coaxial with and rotatably mounted thereon, and also includes a rotary drive motor 53 for driving the material distribution disk 52 to rotate. The base plate 51 is flush with the upper end surface of the conveyor belt 2. An arc-shaped baffle 54 is provided on the outer side of the base plate 51. The arc-shaped baffle 54 is located on the outer side of the material distribution disk 52. The arc-shaped baffle 54 is connected to the base plate 51 through a support column. The arc-shaped baffle 54 is used to limit the movement of the medicine cans that rotate into the material distribution disk 52. The edge of the material distribution disk 52 is provided with multiple stations 521 for accommodating medicine cans 11. The station 521 is a through accommodating hole with an opening on the outside for accommodating medicine cans transported from the conveyor belt 2. The medicine tank lifting part 6 is located below the dispensing plate 52 and is set at a station 521 corresponding to the dispensing plate 52. It is used to lift the medicine tank 11 to contact the inner wall of the flexible sealing ring 42 during filling. The medicine tank lifting part 6 includes a circular lifting plate 61 and a lifting mechanism 62 connected thereto. The axis of the lifting plate 61 is coaxial with the axis of the filling head 31. A through hole 511 is provided on the bottom plate 51 near the conveyor belt 2. The inner diameter of the through hole 511 can be the same as the inner diameter of the receiving hole. The lifting mechanism 62 is located below the bottom plate 51 and connected to the lower part of the frame 1. The lifting plate 61 is located on the upper end face of the extended end of the lifting mechanism 62. The lifting mechanism 62 can drive the lifting plate 61 to rise and fall. The axes of the lifting plate 61, the lifting mechanism 62 and the filling head 31 are coaxial. The plane where the initial position of the lifting plate 61 is located is flush with the upper end face of the bottom plate 51, which makes it easy for the material distribution plate 52 to rotate at a certain angle and rotate the empty medicine tank 11 onto the lifting plate 61 for subsequent powder filling operations.

[0021] The can opening sealing part 7 is located above the distribution plate 52, corresponding to one station 521 of the distribution plate 52, and is used to seal the can opening of the filled medicine can. The can opening sealing part 7 is close to the discharge end 22 of the conveyor belt 2, and can cover or seal the can opening of the medicine can 11. The can opening sealing part 7 is prior art and will not be described in detail here.

[0022] The lower end of the negative pressure sleeve 41 is provided with an annular plate 8. The inner wall of the annular plate 8 is sealed to the outer wall of the filling head 31. The annular plate 8 has multiple through holes 81 along its circumference. The through holes 81 are conical holes with their inner diameter increasing from top to bottom. The conical holes increase the inlet area of ​​the negative pressure suction at the lower part of the powder delivery chamber 45, forming a low-pressure zone with a wider coverage area, which can capture dust rising from the can more efficiently and comprehensively. Moreover, the downward-facing design of the conical holes conforms to the main dispersion direction of the dust generated by the powder, which facilitates dust collection and improves the efficiency of preventing dispersion.

[0023] See Figure 4As shown, the flexible sealing ring 42 includes a rigid sleeve 421 and an annular airbag 422 disposed therein. The annular airbag 422 is adapted to the sleeve and is connected to an external inflation / deflation device via an inflation / deflation pipe 423 with an electric switch. The inflation / deflation device and the negative pressure source are existing technologies and are not shown in the figure. The upper part of the rigid sleeve 421 is connected to the annular plate 8. The electric switch and the inflation / deflation device are electrically connected to the control module. Before the inflation / deflation device inflates, the control module controls the electric switch to open to facilitate inflation of the annular airbag 422. After inflation, the control module controls the electric switch to close according to the value detected by the pressure sensor. During deflation, the control module controls the electric switch to open, and the electric switch can be kept open or closed according to the value detected by the pressure sensor. The rigid sleeve 421 is used to prevent the annular airbag 422 from expanding outward when inflated, allowing the annular airbag 422 to expand inward during inflation and adaptably abut against the mouth of the medicine container, suitable for filling medicine containers 11 of different sizes. The width of the lower part of the rigid sleeve 421 decreases from top to bottom, and the inner diameter of the lower port of the rigid sleeve 421 is larger than the outer diameter of the mouth of the medicine container 11. A pressure sensor is installed between the inflation / deflation pipe 423 and the annular airbag 422. The pressure sensor monitors the pressure signal in real time and feeds it back to the control module. The control module compares the monitored pressure value with a preset pressure range and dynamically adjusts the inflation / deflation device to maintain the internal pressure of the annular airbag 422 within the preset pressure range, thereby achieving adaptive constant pressure sealing.

[0024] The inner wall of the annular airbag 422 is provided with an inclined downward annular baffle 424. The annular baffle 424 is integrally formed with the annular airbag 422 and is made of the same material as the annular airbag 422. The thickness of the annular baffle 424 is greater than the thickness of the annular airbag 422. The annular baffle 424 can cooperate with the lower part of the annular airbag 422 to be stuck on the mouth of the medicine can 11, so as to prevent the medicine powder from falling between the inner wall of the lower part of the annular airbag 422 and the outer wall of the mouth of the medicine can 11, thus avoiding waste of medicine powder.

[0025] The installation structure of the flexible sealing ring 42 and the annular plate 8 is as follows: an outer ring plate 9 and an inner ring plate 10 with different inner diameters are provided below the annular plate 8. The inner wall of the outer ring plate 9 and the outer wall of the inner ring plate 10 form the installation position for installing the flexible sealing ring 42. One side of the rigid sleeve 421 is connected to the inner wall of the outer ring plate 9, and the upper part of the annular airbag 422 abuts against the outer wall of the inner ring plate 10.

[0026] The lower end of the inner ring plate 10 is provided with a coaxial annular protective plate 101. The cross-section of the annular protective plate 101 is arc-shaped. The minimum vertical distance between the annular protective plate 101 and the axis of the filling head 31 is greater than the maximum vertical distance between the through hole 81 and the axis of the filling head 31. The arc-shaped surface of the annular protective plate 101 bends outward to avoid the lower end of the inner ring plate 10 from having a small contact point with the annular airbag 422, thus preventing the inner ring plate 10 from damaging the inflated annular airbag 422.

[0027] The filling method using a powder filling machine includes the following steps: S1. Feeding and Positioning The conveyor belt 2 intermittently transports the empty medicine tank 11 to the station 521 of the distribution plate 52. The distribution plate 52 straightens and initially positions the medicine tank 11. A photoelectric sensor is set at the feeding station 521 of the distribution plate 52 to detect whether the medicine tank 11 is accurately in place and feeds the signal back to the control module.

[0028] S2. The dispensing plate 52 rotates at a preset angle to move the medicine tank 11 to the filling position of the corresponding lifting plate 61, with the medicine tank 11 located directly below the filling head 31.

[0029] S3, Pre-start Start the negative pressure source and simultaneously start the inflation / deflation device to inflate the annular airbag 422.

[0030] S4, Lifting and Sealing The lifting mechanism 62 drives the lifting plate 61 to rise, lifting the medicine container 11 so that its mouth contacts the annular airbag 422 of the sealing and anti-escape unit 4 and generates compression deformation.

[0031] S5, Powder Filling Open the filling valve of filling head 31 to fill the powder.

[0032] S6. Depressurization and Reset After the powder filling is completed, the inflation and deflation equipment is controlled to deflate the annular airbag 422, so that the annular airbag 422 contracts and falls smoothly off the mouth of the medicine can, avoiding pulling the medicine can 11 or bringing out the powder. Then, the lifting mechanism 62 is controlled to drive the lifting plate 61 to descend to be flush with the upper surface of the base plate 51.

[0033] S7, Can opening seal Control the rotation of the dispensing plate 52 to move the filled medicine container 11 to the container opening sealing part 7 for sealing.

[0034] S8. After the medicine tank 11 is sealed, the distribution plate 52 rotates and drives the sealed medicine tank 11 to the discharge end 22 of the conveyor belt 2 for discharge; at the same time, a new empty medicine tank 11 is sent from the previous station 521 to the filling station 521, and steps S2 to S8 are repeated to achieve continuous cyclic filling.

Claims

1. A pharmaceutical powder filling machine characterized by comprising: The utility model relates to a medicine powder filling machine, which comprises a rack (1), a conveying belt (2) arranged on the rack (1) and having a feeding end (21) and a discharging end (22), the feeding end (21) being connected with an external feeding device, and the discharging end (22) being connected with an external discharging device, a filling part (3) arranged on the upper part of the rack (1) and capable of filling medicine powder into medicine cans (11) conveyed by the conveying belt (2), the filling part (3) comprising a filling head (31) and a powder feeding mechanism (32), and a sealing and anti-escape unit (4) being arranged on the filling head (31), the sealing and anti-escape unit (4) comprising a negative pressure sleeve (41), a flexible sealing ring (42), and a negative pressure source connected with the negative pressure sleeve (41), the negative pressure sleeve (41) and the outer wall of the filling head (31) forming a negative pressure cavity (44), the flexible sealing ring (42) being arranged on the outer side of the lower part of the filling head (31) and having a lower end surface below the filling head (31), the inner wall of the flexible sealing ring (42) and the outer wall of the filling head (31) forming a medicine powder feeding cavity (45), and the negative pressure cavity (44) being communicated with the medicine powder feeding cavity (45), a distributing part (5) comprising a bottom plate (51) and a distributing disc (52) coaxially arranged on the bottom plate (51), the bottom plate (51) being flush with the upper end surface of the conveying belt (2), the edge of the distributing disc (52) being provided with a plurality of stations (521) for accommodating the medicine cans (11), the station (521) being a through accommodating hole and having an opening on the outside, a medicine can lifting part (6) being arranged below the distributing disc (52) and corresponding to one station (521) of the distributing disc (52) and used for lifting the medicine cans (11) to abut against the inner wall of the flexible sealing ring (42) during filling, the medicine can lifting part (6) comprising a circular lifting plate (61) and a lifting mechanism (62) connected with the lifting plate (61), and the axis of the lifting plate (61) being coaxial with the axis of the filling head (31), a can opening sealing part (7) being arranged corresponding to one station (521) of the distributing disc (52) and used for sealing the can opening of the filled medicine cans (11). The lower end of the negative pressure sleeve (41) is provided with an annular plate (8), the inner wall of the annular plate (8) is sealingly connected with the outer wall of the filling head (31), and a plurality of through holes (81) are formed in the annular plate (8) along the circumferential direction of the annular plate (8). The flexible sealing ring (42) comprises a hard sleeve (421) and an annular air bag (422) arranged in the hard sleeve (421), the annular air bag (422) is matched with the sleeve, the annular air bag (422) is connected with an external air charging and discharging device through a gas charging and discharging pipeline (423) provided with an electric switch, the upper part of the hard sleeve (421) is connected with the annular plate (8), and the electric switch and the air charging and discharging device are electrically connected with a control module, respectively. The inner wall of the annular air bag (422) is provided with an annular baffle (424) inclined downward. The width of the lower part of the hard sleeve (421) decreases from top to bottom, and the inner diameter of the lower end of the hard sleeve (421) is greater than the outer diameter of the can opening of the medicine cans (11). ​ ​ 2. A powder filling machine according to claim 1, characterized in that ​ 3. A powder filling machine according to claim 2, wherein ​ 4. A powder filling machine according to claim 3, wherein ​ 5. The powder filling machine according to claim 3, wherein ​ 6. The powder filling machine according to claim 3, wherein The outer ring plate (9) and the inner ring plate (10) with different inner diameters are arranged below the annular plate (8), the inner wall of the outer ring plate (9) and the outer wall of the inner ring plate (10) form a mounting position for mounting a flexible sealing ring (42), one side of a hard sleeve (421) is connected with the inner wall of the outer ring plate (9), and the upper portion of an annular air bag (422) abuts against the outer wall of the inner ring plate (10).

7. A powder filling machine according to claim 6, wherein The through hole (81) is a tapered hole, and the inner diameter of the through hole (81) increases from top to bottom.

8. A powder filling machine according to claim 7, characterised in that The inner ring plate (10) is provided with a coaxial annular protection plate (101) at the lower end, the cross section of the annular protection plate (101) is an arc surface, and the minimum vertical distance between the annular protection plate (101) and the axis of the filling head (31) is greater than the maximum vertical distance between the through hole (81) and the axis of the filling head (31).

9. A method of filling using the powder filling machine according to any one of claims 1 to 8, characterized in that, The method comprises the following steps: S1, feeding and positioning The conveying belt (2) intermittently conveys the empty medicine tank (11) to the work station (521) of the distributing disc (52), and the distributing disc (52) rightens and preliminarily positions the medicine tank; S2, the distributing disc (52) rotates at a preset angle, and the medicine tank (11) is moved to the filling position corresponding to the lifting plate (61), and the medicine tank is located directly below the filling head (31); S3, starting the negative pressure source, and simultaneously starting the air charging and discharging equipment to charge the annular air bag (422); S4, jacking and sealing The lifting mechanism (62) drives the lifting plate (61) to rise, and the lifting plate (61) jacks up the medicine tank (11) so that the tank opening of the medicine tank (11) contacts the annular air bag (422) of the sealing and escaping prevention unit (4) and is compressed and deformed; S5, medicine powder filling The filling valve of the filling head (31) is opened, and the medicine powder is filled; S6, pressure relief and reset After the medicine powder filling is completed, the annular air bag (422) is discharged by controlling the air charging and discharging equipment, and the lifting plate (61) is lowered to be flush with the upper end surface of the bottom plate (51) by controlling the lifting mechanism (62); S7, tank opening sealing The distributing disc (52) is controlled to rotate, the medicine tank (11) after filling is moved to the tank opening sealing part (7), and the tank opening sealing is performed; S8, after the medicine tank (11) is sealed, the distributing disc (52) drives the sealed medicine tank (11) to move to the discharge end (22) of the conveying belt (2) for discharging; meanwhile, a new empty medicine tank is sent from the previous work station to the filling work station, and steps S2 to S8 are repeatedly executed to realize continuous cycle filling.

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