A dry compression equipment for levetiracetam tablets

Abstract

The utility model relates to tableting drying technical field, concretely relates to a kind of levetiracetam tabletting drying equipment, including hopper, discharging assembly, tableting assembly and drying assembly;Discharging assembly, be arranged in the below of the hopper, for the levetiracetam tablet powder falling inside the hopper above and pass to the tableting assembly below;Tableting assembly, be arranged in the below of the discharging assembly, for the tablet powder falling of discharging assembly above and powder are quantitatively distributed while being pressed into tablet;Drying assembly, be arranged in the below of the tableting assembly, for the levetiracetam tablet of pressing into shape and carry out drying work.Just compared with prior art, the present application solves the problem of uneven powder material discharging and powder accumulation in the tabletting process in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of tableting and drying technology, and in particular to a tableting and drying device for levetiracetam tablets. Background Technology

[0002] Levetiracetam tablets primarily function as an anti-epileptic drug and are mainly used clinically as adjunctive therapy for epilepsy, particularly in adults and children over 60 years of age with partial seizures. In the pharmaceutical industry, tablet production typically involves three main processes: feeding, compression, and drying. To ensure production efficiency and product quality, the equipment must possess functions such as efficient powder transfer, quantitative distribution, uniform compression, and rapid drying.

[0003] In the prior art, Chinese patent document CN221212867U, a tableting and drying device for levetiracetam tablets, proposes to achieve integrated tableting and drying by setting up a feeding assembly, a tableting assembly, a lower punch assembly, and a heating assembly. The pressure plate is rotated by a rotating shaft so that the drug groove on the outer surface of the pressure plate corresponds to the drug guide port on the upper end of the bottom plate. During the rotation, the drug groove carries the tablets from the drug guide port and into the heating chamber through the drug inlet to complete the drying process, thus achieving automatic drug dispensing. However, in practical applications, it is difficult to accurately measure the amount of material fed in the above technical solution. At the same time, powder is easily generated inside the equipment during the pressing process, which affects the cleanliness of the equipment and the quality of the tablets. Utility Model Content

[0004] In view of this, the purpose of this utility model is to propose a tableting and drying equipment for levetiracetam tablets, so as to solve the problems of uneven feeding of powder materials and powder accumulation during the tableting process in the prior art.

[0005] To achieve the above objectives, this utility model provides a tableting and drying device for levetiracetam tablets, including a feeding hopper, a feeding assembly, a tableting assembly, and a drying assembly, wherein a fixing frame is fixedly connected to the bottom of the feeding hopper;

[0006] The feeding assembly is located below the feeding hopper and is used to receive the levetiracetam tablet powder falling from the upper feeding hopper and transfer it to the lower tableting assembly;

[0007] The tableting assembly is located below the feeding assembly and is used to receive the tablet powder falling from the upper feeding assembly, quantitatively distribute the powder, and compress it into tablets.

[0008] A drying assembly, located below the tableting assembly, is used to receive and dry the compressed levetiracetam tablets.

[0009] Preferably, the feeding assembly includes a feeding tray, which is located directly below the feeding hopper and in close contact with the feeding hopper. A support block is fixedly connected to the lower part of the feeding tray, and a plurality of springs are fixedly connected to the lower part of the support block. The other end of each spring is fixedly connected to a fixing frame. An arc-shaped plate is fixedly connected to the side of the feeding tray away from the support block. An inclined groove is formed on the arc-shaped plate, which is set at a 30-degree angle from the lower left to the upper right.

[0010] Preferably, the tableting assembly includes a base plate fixedly connected to a mounting frame. A stepper motor is fixedly mounted below the base plate. A turntable is fixedly connected to one side of the output shaft of the stepper motor. Multiple tableting molds are fixedly connected to the turntable. The bottom of the tableting molds is in close contact with the base plate. A sun gear of a gear set is fixedly connected to one side of the output shaft of the stepper motor. Multiple planetary gears are meshed with the outer side of the sun gear. A limit bracket is provided above the planetary gears. The planetary gears are rotatably connected to the limit bracket. The limit bracket is fixedly connected to the mounting frame. The outer side of the gear set is meshed with... A rotating cylinder is connected to the turntable and rotates in the opposite direction. Multiple extension rods are fixedly installed on the rotating cylinder, and a connecting rod is fixedly connected to one of the extension rods. A guide rod is slidably installed on the connecting rod. The end of the guide rod away from the connecting rod is used in conjunction with the inclined groove. A cylinder is fixedly installed on the side of the fixed frame near the base plate. A pressing rod is fixedly connected to the free end of the cylinder. The pressing rod is located directly above the tableting mold and has the same diameter. A receiving pipe is provided below the base plate, and a through hole is opened on the base plate directly above the receiving pipe.

[0011] Preferably, the drying assembly includes a drying chamber, which is fixedly connected to one side of the fixed frame. The lower part of the receiving pipe is connected to and communicates with the drying chamber. Multiple receiving plates are slidably arranged inside the drying chamber. An air inlet is opened at the bottom of the drying chamber and is connected to an external drying fan.

[0012] Preferably, a plurality of rod-shaped extensions are fixedly provided on the rotating cylinder, the number of extension rods being consistent with the number of tableting molds, and the bottom surface of the extension rods being in close contact with and in cooperation with the turntable.

[0013] Preferably, the gear set is a gear set in which multiple gears mesh with each other to change the direction of motion, that is, the rotation direction of the rotating cylinder is opposite to the rotation direction of the turntable.

[0014] Preferably, the receiving plate is a drawer-shaped part with multiple hollowed-out positions, the width of which is smaller than the diameter of the tablet pressing mold. The multiple receiving plates are arranged vertically inside the drying oven, and ventilation openings are provided on both sides of the drying oven.

[0015] Preferably, the air inlet is located directly below the receiving pipe, where it connects to the interior of the drying chamber.

[0016] The beneficial effects of this utility model are:

[0017] 1. This tableting and drying equipment for levetiracetam tablets achieves precise material distribution and periodic vibration through the synergistic action between the inclined groove in the feeding assembly and the guide rod in the tableting assembly. This avoids powder accumulation, ensures uniform powder feeding, and thus improves the quantitative distribution accuracy during the tableting process.

[0018] 2. The tableting and drying equipment for levetiracetam tablets features a hollow design for the air inlet and receiving plate of the drying chamber, which ensures sufficient circulation of hot air. The arrangement of multiple receiving plates increases the drying area, and the intervention of airflow can also slow down the falling speed of the compressed tablets, preventing tablet breakage due to excessive falling speed. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a first-view schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a second-view schematic diagram of the overall structure of this utility model;

[0022] Figure 3 This is a left-side view of the overall structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the drying oven of this utility model;

[0024] Figure 5 This is a schematic diagram of some parts of the tablet pressing assembly of this utility model.

[0025] The diagram is marked as follows:

[0026] 1. Feeding hopper; 2. Feeding tray; 3. Spring; 4. Inclined groove; 5. Support block; 6. Guide rod; 7. Connecting rod; 8. Turntable; 9. Tableting mold; 10. Base plate; 11. Cylinder; 12. Pressing rod; 13. Receiving pipe; 14. Drying oven; 15. Receiving plate; 16. Stepper motor; 17. Air inlet; 18. Rotating cylinder; 19. Gear set; 20. Arc plate; 21. Limit bracket. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0028] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] like Figures 1 to 5 As shown, a tableting and drying device for levetiracetam tablets includes a feeding hopper 1, a feeding assembly, a tableting assembly, and a drying assembly. A fixing frame is fixedly connected to the bottom of the feeding hopper 1.

[0030] Furthermore, such as Figures 1 to 3 As shown, the feeding assembly is located below the feeding hopper 1 and is used to receive the levetiracetam tablet powder falling from the upper feeding hopper 1 and transfer it to the lower tableting assembly. It includes a feeding tray 2, which is located directly below the feeding hopper 1 and in close contact with it. A support block 5 is fixedly connected to the lower part of the feeding tray 2, and multiple springs 3 are fixedly connected to the lower part of the support block 5. The other end of the springs 3 is fixedly connected to a fixed frame. An arc plate 20 is fixedly connected to the side of the feeding tray 2 away from the support block 5. An inclined groove 4 is opened on the arc plate 20. The inclined groove 4 is set at a 30-degree angle from the lower left to the upper right. The feeding tray 2 is in close contact with the feeding hopper 1, which can effectively prevent the powder material from overflowing and ensure that the material falls accurately into the feeding assembly, avoiding waste or contamination. The inclined groove 4 and the guide rod 6 work together to periodically pull down and vibrate the entire feeding assembly during the rotation of the connecting rod 7, thereby achieving the effects of feeding and preventing accumulation.

[0031] Furthermore, such as Figure 1 , Figure 2 , Figure 3 as well as Figure 5As shown, the tableting assembly, located below the feeding assembly, is used to receive the tablet powder falling from the upper feeding assembly, quantitatively distribute the powder, and simultaneously compress it into tablets. It includes a base plate 10, which is fixedly connected to a fixed frame. A stepper motor 16 is fixedly installed below the base plate 10. A turntable 8 is fixedly connected to one side of the output shaft of the stepper motor 16. Multiple tableting molds 9 are fixedly connected to the turntable 8. The bottom of the tableting molds 9 is in close contact with the base plate 10. The sun gear of a gear set 19 is fixedly connected to one side of the output shaft of the stepper motor 16. Multiple planetary gears are meshed with the outside of the sun gear. A limit bracket 21 is provided above the planetary gears, and the planetary gears are rotatably connected to the limit bracket 21. The limit bracket 21 is connected to... A fixed frame is fixedly connected to the gear set 19, and a rotating cylinder 18 is meshed with the outer side of the gear set 19. The inner side of the rotating cylinder 18 is provided with a toothed structure, which meshes with a planetary gear through the toothed structure. The rotating cylinder 18 is rotatably connected to the turntable 8 and rotates in opposite directions. Multiple extension rods are fixedly installed on the rotating cylinder 18, and a connecting rod 7 is fixedly connected to one of the extension rods. A guide rod 6 is slidably installed on the connecting rod 7. The end of the guide rod 6 away from the connecting rod 7 is used in conjunction with the inclined groove 4. A cylinder 11 is fixedly installed on the fixed frame near the bottom plate 10. A pressing rod 12 is fixedly connected to the free end of the cylinder 11. The pressing rod 12 is located directly above the tablet pressing mold 9 and has the same diameter. A receiving pipe 13 is provided below the bottom plate 10. A through hole is provided directly above the receiving pipe 13. Multiple rod-shaped extensions are fixedly installed on the rotating cylinder 18, the number of which matches the number of tableting molds 9. The bottom surface of the extension rods is in close contact with and cooperates with the turntable 8. The gear set 19 is a gear set consisting of multiple meshing gears that change the direction of motion; that is, the rotation direction of the rotating cylinder 18 is opposite to the rotation direction of the turntable 8. The cooperation between the stepper motor 16 and the turntable 8 achieves uniform distribution of tablet powder and precise control of the tableting volume per compression. The close contact between the tableting mold 9 and the base plate 10 ensures stability during tablet compression and guarantees consistent tablet quality. The gear set 19 changes the rotation direction of the rotating cylinder 18 through meshing, making it in close contact with the turntable. The counter-rotating cylinder 18 effectively prevents powder from accumulating or agglomerating in the mold, ensuring uniform powder distribution during the pressing process and improving production efficiency. The design of cylinder 11 and pressing rod 12 enables automated tableting. By precisely controlling the position of pressing rod 12, tablets of different thicknesses and densities can be pressed, improving production flexibility and product consistency. The multi-rod extensions of the rotating cylinder 18 correspond one-to-one with the tableting mold 9, ensuring that the rotating cylinder 18 can effectively clean up excess powder when the turntable 8 rotates, and ensuring the cleanliness and precise filling of each mold. At the same time, the design of the rotating cylinder 18 has a very close contact with the turntable 8, which helps to improve the uniformity of material distribution and avoid material waste.

[0032] Furthermore, such as Figures 1 to 4As shown, the drying assembly, located below the tableting assembly, is used to receive and dry the compressed levetiracetam tablets. It includes a drying chamber 14, which is fixedly connected to one side of a mounting frame. The lower part of the receiving pipe 13 is connected to and communicates with the drying chamber 14. Multiple receiving plates 15 are slidably arranged inside the drying chamber 14. An air inlet 17 is opened at the bottom of the drying chamber 14, and the air inlet 18 is connected to an external drying fan. The air inlet 17 is located directly below the receiving pipe 13 inside the drying chamber 14. The receiving plate 15 is a drawer-shaped part with multiple open positions, the width of which is smaller than the diameter of the tableting mold 9. Multiple receiving plates 15 are arranged vertically inside the drying chamber 14. Ventilation openings are opened on both sides of the drying chamber 14. The bottom air inlet 17 of the drying chamber 14 is directly connected to the receiving pipe 13, ensuring that the airflow entering the drying chamber 14 directly acts on the compressed tablets. This design improves airflow efficiency, thereby accelerating the tablet drying process. The perforated design of the receiving plate 15 not only receives the tablets but also allows hot air to pass through effectively, ensuring full contact between the air and the tablets, thus improving drying efficiency. The perforation size is set smaller than the diameter of the tableting mold 9 to prevent tablets from overlapping or falling during the drying process. Multiple receiving plates 15 are arranged vertically, increasing the drying area of ​​the tablets and improving the space utilization of the drying chamber 14. This layout allows more tablets to be dried efficiently in a limited space, reducing drying time. Ventilation vents are provided on both sides of the drying chamber 14 to guide airflow evenly, ensuring uniform distribution of hot air inside the chamber and preventing uneven drying of tablets, thus ensuring consistent tablet quality. The air inlet 17 located directly below the receiving pipe 13 also provides some cushioning for falling tablets, preventing excessive impact from direct fall and thus damaging the overall structure.

[0033] Workflow:

[0034] When using the equipment, first, the entire device needs to be powered on. Then, the levetiracetam tablets to be compressed are poured into the feeding hopper 1. At this time, the stepper motor 16 drives the turntable 8 and the rotating cylinder 18 to rotate. The connecting rod 7 will drive the guide rod 6 to slide on the inclined groove 4, which will cause the feeding tray 2 to tilt to one side of the turntable 8, pouring the powder into the turntable 8. The extension rod of the rotating cylinder 18 will scrape the powder evenly inside the tableting mold 9. Then, the air source of the cylinder 11 is turned on, and the pressing rod 1... 2. Perform the pressing and lifting actions to compress the powder into tablets. When the tableting mold 9 moves above the receiving pipe 13, the compressed tablets will fall into the receiving plate 15 inside the drying oven 14 under the action of gravity. At this time, the air source of the air inlet 17 is turned on, and the upward air provides a certain upward force for the tablets, slowing down the falling speed. After a certain period of time, the receiving plate 15 is pulled out, and the lower receiving plate 15 continues to perform the receiving work. The tablets are pulled out one by one for collection.

[0035] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0036] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tableting and drying apparatus for levetiracetam tablets, characterized in that, include: The hopper (1), feeding assembly, tableting assembly and drying assembly are provided. The bottom of the hopper (1) is fixedly connected to a frame. The feeding assembly is located below the feeding hopper (1) and is used to receive the levetiracetam tablet powder falling from the upper feeding hopper (1) and transfer it to the lower tableting assembly; The tableting assembly is located below the feeding assembly and is used to receive the tablet powder falling from the upper feeding assembly, quantitatively distribute the powder, and compress it into tablets. A drying assembly, located below the tableting assembly, is used to receive and dry the compressed levetiracetam tablets.

2. The tableting and drying equipment for levetiracetam tablets according to claim 1, characterized in that, The feeding assembly includes a feeding tray (2), which is located directly below the feeding hopper (1) and in close contact with the feeding hopper (1). A support block (5) is fixedly connected to the lower part of the feeding tray (2), and multiple springs (3) are fixedly connected to the lower part of the support block (5). The other end of the springs (3) is fixedly connected to the fixing frame. An arc plate (20) is fixedly connected to the side of the feeding tray (2) away from the support block (5). An inclined groove (4) is provided on the arc plate (20), and the inclined groove (4) is set at a 30-degree angle from the lower left to the upper right.

3. The tableting and drying equipment for levetiracetam tablets according to claim 2, characterized in that, The tableting assembly includes a base plate (10), which is fixedly connected to a mounting frame. A stepper motor (16) is fixedly installed below the base plate (10). A turntable (8) is fixedly connected to one side of the output shaft of the stepper motor (16). Multiple tableting molds (9) are fixedly connected to the turntable (8). The bottom of the tableting molds (9) is in close contact with the base plate (10). The sun gear of a gear set (19) is fixedly connected to one side of the output shaft of the stepper motor (16). Multiple planetary gears are meshed with the outside of the sun gear. A limit bracket (21) is provided above the planetary gears. The planetary gears are rotatably connected to the limit bracket (21). The limit bracket (21) is fixedly connected to the mounting frame. A rotating cylinder (18) is meshed with the outside of the gear set (19). The rotating cylinder (18) is rotatably connected to the turntable (8) and rotates in opposite directions. Multiple extension rods are fixedly provided on the rotating cylinder (18), and a connecting rod (7) is fixedly connected to one of the extension rods. A guide rod (6) is slidably installed on the connecting rod (7). The end of the guide rod (6) away from the connecting rod (7) is used in conjunction with the inclined groove (4). A cylinder (11) is fixedly installed on the side of the fixed frame near the bottom plate (10). A pressing rod (12) is fixedly connected to the free end of the cylinder (11). The pressing rod (12) is located directly above the tablet mold (9) and has the same diameter. A receiving pipe (13) is provided below the bottom plate (10). A through hole is opened on the bottom plate (10) directly above the receiving pipe (13).

4. The tableting and drying equipment for levetiracetam tablets according to claim 3, characterized in that, The drying assembly includes a drying chamber (14), which is fixedly connected to one side of a fixed frame. The lower part of the receiving pipe (13) is connected to and communicates with the drying chamber (14). Multiple receiving plates (15) are slidably arranged inside the drying chamber (14). An air inlet (17) is opened at the bottom of the drying chamber (14), and the air inlet (17) is connected to an external drying fan.

5. The tableting and drying equipment for levetiracetam tablets according to claim 3, characterized in that, The number of extension rods is the same as the number of tablet molds (9), and the bottom surface of the extension rods is in close contact with the turntable (8) and used in conjunction with it.

6. The tableting and drying equipment for levetiracetam tablets according to claim 3, characterized in that, The gear set (19) is a gear set in which multiple gears mesh with each other to change the direction of motion, that is, the rotation direction of the rotating cylinder (18) and the extension rod is opposite to the rotation direction of the turntable (8).

7. The tableting and drying equipment for levetiracetam tablets according to claim 4, characterized in that, The receiving plate (15) is a drawer-shaped part with multiple hollow positions. The width of the hollow positions is smaller than the diameter of the tablet pressing mold (9). Multiple receiving plates (15) are arranged vertically inside the drying oven (14). Ventilation openings are provided on both sides of the drying oven (14).

8. The tableting and drying equipment for levetiracetam tablets according to claim 4, characterized in that, The air inlet (17) is located inside the drying chamber (14) directly below the receiving pipe (13).

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