A circulating medicine pulverizing device and pulverizing method based on secondary pulverization

Abstract

The present invention relates to the technical field related to drug pulverization processing, and specifically to a circulating drug pulverization device and pulverization method based on secondary pulverization, wherein the circulating drug pulverization device based on secondary pulverization includes a first cabinet and a second cabinet arranged on the side of the first cabinet, and the second cabinet is provided with a cyclone dust collector for collecting the pulverized powder; the circulating drug pulverization device based on secondary pulverization also includes: a cylinder, which is movably arranged in the first cabinet, and a grinding disc is provided in the cylinder, the grinding disc is sealed and slidably fitted with the inner wall of the cylinder, and the grinding disc is connected to a feed hopper arranged on the first cabinet through a feed passage; a feed passage and a material transfer passage are provided, and the entire working process is divided into primary pulverization and secondary pulverization. Whenever a primary pulverization is completed, the back-blowing mechanism can automatically classify the drugs, so that the drugs covered and submerged by the powder are retained for the secondary pulverization processing.

Description

Technical Field

[0001] The present invention relates to the technical field related to drug pulverization processing, and in particular to a circulating drug pulverization device and a pulverization method based on secondary pulverization. Background Art

[0002] Drug crushing is beneficial to the preparation of tablets and other dosage forms. The preparation of commonly used medicines such as tablets, powders, pills, and gels requires powdered raw materials and excipients with appropriate particle size, so crushing and grinding are basic operating procedures for preparing certain medicines.

[0003] There are many methods for drug crushing, among which using a grinding disc to crush drugs is a common method. With some existing equipment, as the crushing progresses, the powder gradually increases, and some drugs that have not yet met the crushing requirements may be covered by the powder, which makes it difficult for the grinding disc to effectively apply pressure to the drugs, making it impossible to crush them thoroughly. For this reason, the staff often need to suspend the equipment, screen the drugs, and then crush the drugs that need further crushing for a second time. The entire crushing process becomes complicated and it is difficult to achieve the ideal use effect. Summary of the Invention

[0004] The object of the present invention is to provide a circulating medicine pulverizing device and pulverizing method based on secondary pulverization to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A circulating medicine pulverizing device based on secondary pulverization comprises a first cabinet and a second cabinet provided on the side of the first cabinet, wherein the second cabinet is provided with a cyclone dust collector for collecting the pulverized powder;

[0007] The circulating medicine pulverizing device based on secondary pulverization further comprises:

[0008] A cylinder is movably disposed in the first cabinet, and a grinding disc is disposed in the cylinder. The grinding disc is in sealing and sliding contact with the inner wall of the cylinder, and the grinding disc is connected to a feed hopper disposed on the first cabinet through a feed passage;

[0009] a lifting drive mechanism installed in the first cabinet and connected to the cylinder, the lifting drive mechanism can drive the cylinder to rise so that the medicine entering the cylinder through the feeding passage contacts the bottom of the grinding disc, and the cylinder can be driven by the power mechanism installed in the first cabinet to rotate, thereby performing primary and secondary crushing on the medicine in the cylinder;

[0010] The back-blowing mechanism and the conduction control mechanism are respectively connected to the cylinder and the feed passage. The conduction control mechanism cooperates with the lifting drive mechanism. After the first crushing process is completed, the conduction control mechanism can switch the feed passage from a conduction state to a blocked state, and the back-blowing mechanism blows the powder in the cylinder through the transfer passage to the cyclone dust collector. In the secondary crushing process, the lifting drive mechanism drives the cylinder to increase its upward stroke.

[0011] As a further solution of the present invention, the material transfer passage includes an inclined pipe fixed in the first cabinet and connected to the cyclone dust collector at one end, and a second vertical pipe connected to the other end of the inclined pipe, the second vertical pipe is fixed to the grinding disc, and a filter disc is provided in the inclined pipe;

[0012] The feeding passage includes a first vertical pipe connected to the feeding hopper, the first vertical pipe is concentric with the second vertical pipe, and a gap is reserved between the two, and the conduction control mechanism is located in the gap.

[0013] As a further solution of the present invention: the back-blowing mechanism includes an air ring sealed and rotatably connected to the cylinder and a bellows connected to the air ring, the air ring is connected to the lifting drive mechanism, the end of the bellows away from the air ring is connected to the air outlet of the air pump provided in the second cabinet, and a plurality of inclined air holes connected to the air ring are equidistantly provided on the cylinder along the circumference.

[0014] As a further solution of the present invention: the lifting drive mechanism includes a transverse plate movably disposed in the first cabinet, the transverse plate being capable of being driven to reciprocate by a threaded drive assembly disposed in the first cabinet, and the reciprocating stroke of the transverse plate being fixed;

[0015] Wherein, a guide groove is provided on the transverse plate, a slider is slidably embedded in the guide groove, the slider is connected to the transposition structure installed on the transverse plate, and the slider is connected to the air ring through a sliding fitting component.

[0016] As a further solution of the present invention: the sliding fitting assembly includes a connecting plate arranged in the first cabinet and capable of being raised and lowered in the first cabinet, the connecting plate is provided with a first through slot, a driving column is fixed on the slider, the driving column passes through the first through slot and is slidingly connected to the connecting plate, the first through slot includes a first straight slot and a first inclined slot connected to each other, and the connecting plate is connected to the air ring through two sets of elastic connection structures.

[0017] As a further solution of the present invention: the elastic connection structure includes a connecting arm fixed on the connecting plate, a guide column fixed on the connecting arm, and a cylindrical spring sleeved on the outer periphery of the guide column, the guide column passes through the lug formed on the outer wall of the air ring and is slidably connected to the lug, and the two ends of the cylindrical spring are respectively connected to the lug and the connecting arm.

[0018] As a further solution of the present invention: the shifting structure includes a cam rotatably mounted on the transverse plate, a boss fixed to the cam, and a ratchet coaxially fixed to the cam; a transmission rod is fixed to a side of the slider away from the drive column, the transmission rod is provided with a slide groove, the boss extends into the slide groove and is slidably connected to the transmission rod;

[0019] Wherein, the rotating shaft of the cam is further connected to a limiting structure provided on the transverse plate, and a ratchet plate cooperating with the ratchet wheel is fixedly installed in the first cabinet.

[0020] As a further solution of the present invention: the limiting structure includes an elastic telescopic rod installed on the cam rotating shaft and a limiting wheel provided at the movable end of the elastic telescopic rod, a limiting plate is fixed on the transverse plate, and two limiting protrusions are relatively provided in the limiting plate, and the limiting wheel abuts against the limiting protrusions.

[0021] As a further embodiment of the present invention, the conduction control mechanism includes a guide plate fixed to the inner wall of the first cabinet and a telescopic plate slidably engaged with the guide plate, the telescopic plate being in sealing and sliding connection with the first vertical pipe and the second vertical pipe, and having a through hole formed on the telescopic plate;

[0022] In which, the telescopic plate is also fixedly connected to a driven plate, and a second through slot is provided on the driven plate. The second through slot is adapted to a column fixed on the transverse plate, and the column passes through the second through slot and is slidably connected to the driven plate. The second through slot includes a second inclined slot and a second straight slot connected to each other.

[0023] A medicine pulverization method, using the aforementioned circulating medicine pulverization device based on secondary pulverization, comprises the following steps:

[0024] Step 1: placing the drug to be processed into the hopper;

[0025] Step 2: The lifting drive mechanism works to drive the cylinder to rise, the conduction control mechanism is triggered, the feeding passage is connected, and the medicine falls into the cylinder;

[0026] Step 3: The power mechanism works to drive the cylinder to rotate and enter the primary crushing process;

[0027] Step 4: After the primary crushing is completed, the drum descends and resets, the conduction control mechanism blocks the feed passage, and the back-blowing mechanism works to blow the powder into the cyclone dust collector for collection;

[0028] Step 5: The lifting drive mechanism drives the cylinder to rise again, and the cylinder's rising stroke increases, entering the secondary crushing process;

[0029] Step 6: After the secondary crushing is completed, the cylinder descends and resets, and the back-blowing mechanism works to blow the remaining powder into the cyclone dust collector for collection.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] A feeding channel and a material transfer channel are set up, and the entire working process is divided into primary crushing and secondary crushing. After each primary crushing is completed, the back-flushing mechanism can automatically classify the drugs, so that the drugs covered and submerged by the powder are retained for the secondary crushing process;

[0032] Compared with the primary crushing process, in the secondary crushing process, the upward stroke of the cylinder automatically increases according to the decrease in the amount of medicine in the cylinder, thereby realizing the secondary circulation crushing processing function. Through the cooperation of the lifting drive mechanism and the conduction control mechanism, the automatic conduction and blocking of the feeding passage can be realized, which is convenient for the automatic screening and transfer of medicines. There is no need for staff to stop the operation, which simplifies the work process and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a structural schematic diagram of an embodiment of a circulating medicine pulverizing device based on secondary pulverization.

[0034] Figure 2 This is a schematic diagram of the internal structure of the first cabinet in an embodiment of a circulating medicine pulverizing device based on secondary pulverization.

[0035] Figure 3 This is a structural diagram of the lifting drive mechanism in an embodiment of a circulating medicine pulverizing device based on secondary pulverization.

[0036] Figure 4 for Figure 3 Schematic diagram of the structure from another angle.

[0037] Figure 5 This is an exploded diagram of the structure of the conduction control mechanism in one embodiment of a circulating medicine pulverizing device based on secondary pulverization.

[0038] Figure 6 This is a structural explosion diagram of the feeding passage and the material transfer passage in one embodiment of a circulating medicine pulverizing device based on secondary pulverization.

[0039] Figure 7This is a half-section view of the cylinder in one embodiment of a circulating medicine pulverizing device based on secondary pulverization.

[0040] Figure 8 This is a structural explosion diagram of the switching structure in an embodiment of a circulating medicine pulverizing device based on secondary pulverization.

[0041] In the figure: 1. First cabinet; 2. Second cabinet; 3. Cylinder; 301. Inclined air hole; 302. Conical protrusion; 4. Feed hopper; 5. First vertical pipe; 6. Inclined pipe; 601. Filter plate; 7. Second vertical pipe; 8. Grinding disc; 9. Rotating shaft; 10. Sleeve; 11. Air ring; 1101. Lug; 12. Bellows; 13. Connecting plate; 1301. First straight groove; 1302. First inclined groove; 14. Connecting arm; 15. Guide post; 16. Cylindrical spring. 17. Transverse plate; 1701. Guide groove; 18. Slider; 19. Drive column; 20. Vertical column; 21. Transmission rod; 2101. Slide groove; 22. Cam; 2201. Boss; 23. Ratchet; 24. Ratchet plate; 25. Elastic telescopic rod; 26. Limiting wheel; 27. Limiting disk; 2701. Limiting protrusion; 28. Follower plate; 2801. Second inclined groove; 2802. Second straight groove; 29. Guide plate; 30. Telescopic plate; 3001. Through hole. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0044] See also Figures 1-8 In an embodiment of the present invention, a circulating drug pulverizing device based on secondary pulverization includes a first cabinet 1 and a second cabinet 2 arranged on the side of the first cabinet 1, and the second cabinet 2 is provided with a cyclone dust collector for collecting the pulverized powder; the cyclone dust collector is an application of the existing technology, which is not only suitable for collecting dust, but also for recycling powder. Its specific working principle will not be described in detail in this application.

[0045] The circulating medicine pulverizing device based on secondary pulverization further comprises:

[0046] A cylinder 3 is movably disposed in the first cabinet 1, and a grinding disc 8 is disposed in the cylinder 3. The grinding disc 8 is in sealing and sliding contact with the inner wall of the cylinder 3, and the grinding disc 8 is connected to the feed hopper 4 provided on the first cabinet 1 through a feed passage;

[0047] A lifting drive mechanism is installed in the first cabinet 1 and connected to the cylinder 3. The lifting drive mechanism can drive the cylinder 3 to rise so that the medicine entering the cylinder 3 through the feeding passage contacts the bottom of the grinding disc 8. The cylinder 3 can be driven by the power mechanism provided in the first cabinet 1 to rotate, thereby performing primary and secondary crushing on the medicine in the cylinder 3.

[0048] The back-blowing mechanism and the conduction control mechanism are respectively connected to the cylinder 3 and the feed passage. The conduction control mechanism cooperates with the lifting drive mechanism. After the first crushing process is completed, the conduction control mechanism can switch the feed passage from a conduction state to a blocked state, and the back-blowing mechanism blows the powder in the cylinder 3 into the cyclone dust collector through the transfer passage. In the secondary crushing process, the lifting drive mechanism drives the cylinder 3 to increase its upward stroke.

[0049] Specifically, during operation, after the medicine to be processed is placed in the feed hopper 4, it enters a primary crushing process, and the lifting drive mechanism works to drive the cylinder 3 to move upward so that the bottom wall of the cylinder 3 approaches the bottom of the grinding disc 8. In the first stroke of this process, the conduction control mechanism is triggered to switch the blocked state of the feed passage to the conducting state, so that the medicine to be processed enters the cylinder 3 through the feed passage, and finally, the medicine contacts the bottom of the grinding disc 8.

[0050] Subsequently, the power mechanism drives the cylinder 3 to rotate, and the medicine is gradually crushed by friction between the bottom of the grinding disc 8 and the bottom wall of the cylinder 3. After a period of time, there will be a lot of powder between the bottom of the grinding disc 8 and the bottom wall of the cylinder 3. However, some medicines that have not yet reached the required particle size may be covered by the large amount of powder. These medicines cannot be effectively squeezed between the bottom of the grinding disc 8 and the bottom wall of the cylinder 3, and thus cannot be effectively crushed.

[0051] Then the lifting drive mechanism drives the cylinder 3 to move downward and reset, the conduction control mechanism switches the conduction state of the feed passage to the blocked state, and the back-blowing mechanism works to blow the powder that has reached the particle size standard after the primary pulverization process into the cyclone dust collector through the material transfer passage for collection, while the medicine that has not been effectively pulverized returns to the cylinder 3 for secondary pulverization.

[0052] The secondary crushing process is the same as the primary crushing process. The only difference is that the upward stroke of the cylinder 3 is increased to ensure that the medicine that needs to be crushed for the second time can receive effective pressure between the bottom of the grinding disc 8 and the bottom wall of the cylinder 3, thereby ensuring effective crushing.

[0053] Please refer again Figure 6 and Figure 7 The material transfer passage includes an inclined pipe 6 fixed in the first cabinet 1 and connected to the cyclone dust collector at one end, and a second vertical pipe 7 connected to the other end of the inclined pipe 6. The second vertical pipe 7 is fixed to the grinding disc 8, and a filter disc 601 is installed in the inclined pipe 6. The feed passage includes a first vertical pipe 5 connected to the feed hopper 4. The first vertical pipe 5 and the second vertical pipe 7 are concentric, with a gap reserved between them. The conduction control mechanism is located in the gap.

[0054] Furthermore, when the back-blowing mechanism is working, the conduction control mechanism can block the gap between the first vertical pipe 5 and the second vertical pipe 7, and the back-blowing mechanism blows air into the cylinder 3, prompting the crushed medicine in the cylinder 3 to enter the second vertical pipe 7, and then pass into the cyclone dust collector through the inclined pipe 6. The filter disc 601 plays a filtering role. In the back-blowing process after the completion of the first crushing, some medicines that have not yet reached the required particle size are blocked by the large amount of powder and cannot pass through the inclined pipe 6. After the back-blowing process stops, these blocked medicines fall back into the cylinder 3 for secondary crushing.

[0055] It should be noted that a conical protrusion 302 is formed at the center of the bottom wall of the cylinder 3. When the conduction control mechanism conducts the gap between the first vertical tube 5 and the second vertical tube 7, the medicine in the feed hopper 4 can fall into the cylinder 3. Due to the setting of the conical protrusion 302, the medicine can be scattered around, avoiding the presence of medicine in the center of the cylinder 3 during the crushing process. These medicines are hidden in the second vertical tube 7 and cannot be effectively crushed.

[0056] The back-blowing mechanism includes an air ring 11 sealed and rotatably connected to the cylinder 3 and a bellows 12 connected to the air ring 11. The air ring 11 is connected to the lifting drive mechanism. The end of the bellows 12 away from the air ring 11 is connected to the air outlet of the air pump provided in the second cabinet 2, and a plurality of inclined air holes 301 connected to the air ring 11 are equidistantly provided on the cylinder 3 along the circumference.

[0057] It should be emphasized that during backblowing, the air pump works to blow air into the cylinder 3 through the inclined air holes 301. At this time, the medicine in the cylinder 3 can enter the inclined tube 6 through the first vertical tube 5 and be filtered by the filter disc 601. The powder that reaches the required particle size passes through the inclined tube 6 and enters the cyclone dust collector for collection. The medicine that does not reach the required particle size falls back into the cylinder 3 after the air pump stops working to undergo secondary crushing.

[0058] Preferably, during backflushing, the air pump does not work continuously but intermittently, in order to prevent the medicine that cannot pass through the filter disc 601 from clogging the filter disc 601 and causing low powder collection efficiency.

[0059] Please refer again Figure 3 、 Figure 4 as well as Figure 8 The lifting drive mechanism includes a transverse plate 17 movably mounted within the first cabinet 1. The transverse plate 17 can be driven to reciprocate by a threaded drive assembly within the first cabinet 1, and the reciprocating stroke of the transverse plate 17 is fixed. A guide groove 1701 is defined within the transverse plate 17, within which a slider 18 slidably engages. The slider 18 is connected to a transposition structure mounted on the transverse plate 17, and is connected to the air ring 11 via a sliding fit assembly.

[0060] In detail, the threaded drive assembly includes a screw rod rotatably installed in the first cabinet 1, a guide rod fixed in the first cabinet 1, and a threaded sleeve and a guide sleeve respectively provided on the screw rod and the guide rod. The threaded sleeve and the guide sleeve are both fixed to the transverse plate 17, and the guide sleeve is slidably connected to the guide rod. The threaded sleeve is threadedly connected to the screw rod. A first driving motor is installed in the second cabinet 2. The output end of the first driving motor is connected to the screw rod for driving the screw rod to rotate, so that the threaded sleeve and the screw rod are threadedly matched, prompting the transverse plate 17 to reciprocate in the first cabinet 1.

[0061] In addition, the power assembly includes a rotating shaft 9 rotatably installed in the first cabinet 1 and a sleeve 10 that slides with the rotating shaft 9 and is fixedly connected to the cylinder 3. A second drive motor is also installed in the first cabinet 1. The output end of the second drive motor is connected to the rotating shaft 9. The outer wall of the rotating shaft 9 is formed with a strip protrusion, and the inner wall of the sleeve 10 is provided with a strip groove adapted to the strip protrusion. When the cylinder 3 is raised or lowered, it drives the sleeve 10 to slide on the rotating shaft 9. When the second drive motor is working, it can drive the rotating shaft 9 to rotate. The rotating shaft 9 can drive the sleeve 10 and the cylinder 3 to rotate through the strip protrusion and the strip groove.

[0062] The sliding fitting assembly includes a connecting plate 13 which is arranged in the first cabinet 1 and can be lifted and lowered in the first cabinet 1. A first through slot is provided on the connecting plate 13. A driving column 19 is fixed on the slider 18. The driving column 19 passes through the first through slot and is slidingly connected to the connecting plate 13. The first through slot includes a first straight slot 1301 and a first inclined slot 1302 which are connected. The connecting plate 13 is connected to the air ring 11 through two sets of elastic connection structures.

[0063] It should be added that in order to ensure that the driving column 19 can stably slide with the connecting plate 13, a guide rail (not shown in the figure) is also provided in the first cabinet 1. The guide rail is slidably connected to the connecting plate 13 and is used to guide the connecting plate 13 so that the connecting plate 13 can only perform lifting actions.

[0064] The elastic connection structure includes a connecting arm 14 fixed on the connecting plate 13, a guide column 15 fixed on the connecting arm 14, and a cylindrical spring 16 sleeved on the outer periphery of the guide column 15. The guide column 15 passes through the lug 1101 formed on the outer wall of the air ring 11 and is slidably connected to the lug 1101. The two ends of the cylindrical spring 16 are respectively connected to the lug 1101 and the connecting arm 14.

[0065] When the threaded drive assembly drives the transverse plate 17 to move away from the second cabinet 2, the driving column 19 will move along the first straight groove 1301 and the first inclined groove 1302 in sequence, and the driving column 19 can slide with the connecting plate 13 through the first inclined groove 1302, so that the connecting plate 13 moves upward. Correspondingly, the connecting plate 13 drives the cylinder 3 to rise through the connecting arm 14. After the medicine in the cylinder 3 contacts the bottom of the grinding disc 8, as the cylinder 3 continues to rise, the cylindrical spring 16 will be gradually compressed. Therefore, the medicine between the bottom of the grinding disc 8 and the bottom wall of the cylinder 3 is subjected to a certain pressure. When the power mechanism drives the cylinder 3 to rotate subsequently, the medicine can be effectively crushed.

[0066] After the crushing process is completed in sequence, the threaded drive mechanism drives the transverse plate 17 to move toward the second cabinet 2 and reset. In the latter part of this process, the transposition structure is triggered, prompting the slider 18 to slide in the guide groove 1701, so that the initial distance between the drive column 19 and the second cabinet 2 increases. Therefore, when the movable stroke of the transverse plate 17 is fixed, during the subsequent secondary crushing process, the movable distance of the drive column 19 in the first inclined groove 1302 becomes longer, that is, the rising stroke of the connecting plate 13 becomes larger, ensuring that when the amount of medicine in the cylinder 3 is reduced during the secondary crushing, the medicine to be subjected to the secondary crushing can be effectively subjected to the crushing pressure.

[0067] The shifting structure includes a cam 22 rotatably mounted on the transverse plate 17, a boss 2201 fixed to the cam 22, and a ratchet 23 coaxially fixedly mounted with the cam 22. A transmission rod 21 is fixed to the side of the slider 18 away from the drive post 19. The transmission rod 21 is provided with a slide groove 2101, into which the boss 2201 extends and is slidably connected to the transmission rod 21. The rotation axis of the cam 22 is also connected to a limiting structure provided on the transverse plate 17, and a ratchet plate 24 is fixedly mounted within the first cabinet 1 to cooperate with the ratchet 23.

[0068] After the first crushing is completed, the threaded drive assembly drives the transverse plate 17 to move toward the second cabinet 2 in the latter part of the stroke to reset. The ratchet 23 cooperates with the ratchet on the ratchet plate 24 to rotate, and drives the cam 22 to rotate half a circle. Then, the protruding column 2201 slides with the transmission rod 21 through the sliding groove 2101, prompting the transmission rod 21 to drive the slider 18 to slide in the guide groove 1701, resulting in an increase in the initial distance between the driving column 19 and the second cabinet 2. Therefore, during the secondary crushing, the active stroke of the driving column 19 in the first inclined groove 1302 is increased, and the upward movement of the connecting plate 13 is increased.

[0069] After the secondary crushing is completed, in the latter part of the travel of the transverse plate 17 returning to its original position, the ratchet 23 drives the cam 22 to rotate half a circle again, and the boss 2201 prompts the transmission rod 21 to drive the slider 18 to slide and return to its original position in the guide groove 1701 .

[0070] The limiting structure includes an elastic telescopic rod 25 installed on the rotating shaft of the cam 22 and a limiting wheel 26 provided at the movable end of the elastic telescopic rod 25. A limiting disk 27 is fixed on the transverse plate 17, and two limiting protrusions 2701 are relatively provided in the limiting disk 27. The limiting wheel 26 abuts against the limiting protrusions 2701.

[0071] Specifically, the elastic telescopic rod 25 includes a guide cylinder fixed to the rotating shaft of the cam 22, a telescopic rod slidably engaged with the guide cylinder, and a spring disposed inside the guide cylinder. One end of the telescopic rod is connected to the spring, and the limiting wheel 26 is rotatably mounted on the other end of the telescopic rod.

[0072] Secondly, the limiting protrusion 2701 is formed with an arcuate surface and two inclined surfaces respectively connecting the two ends of the arcuate surface. The arcuate surface is adapted to the limiting wheel 26. Whenever the cam 22 rotates half a circle, the limiting wheel 26 can be deflected from one limiting protrusion 2701 to the other limiting protrusion 2701. Under the support of the spring, it can stabilize the rotation of the cam 22 and improve the rotation accuracy of the cam 22.

[0073] During the sliding fit between the driving column 19 and the connecting plate 13 through the first inclined groove 1302, the slider 18 has a sliding tendency in the guide groove 1701. However, since the boss 2201 is located at the midpoint of the slide groove 2101 at this time, and the boss 2201 is at the same height as the rotation center of the cam 22, the cam 22 can avoid deflection.

[0074] Please refer again Figure 5 The conduction control mechanism includes a guide plate 29 fixed to the inner wall of the first cabinet 1 and a telescopic plate 30 that slidably engages with the guide plate 29. The telescopic plate 30 is in sealed sliding connection with the first vertical tube 5 and the second vertical tube 7, and is provided with a through hole 3001. The telescopic plate 30 is also fixedly connected to a driven plate 28. The driven plate 28 has a second through slot that mates with a column 20 fixed to the transverse plate 17. The column 20 extends through the second through slot and is slidably connected to the driven plate 28. The second through slot includes a second inclined slot 2801 and a second straight slot 2802 that are connected.

[0075] Furthermore, the driven plate 28 is fixed to the telescopic plate 30 via a connecting piece, and a through hole for the movement of the connecting piece is provided at the bottom of the guide plate 29;

[0076] Whenever the transverse plate 17 moves away from the second cabinet 2, the column 20 moves in sequence along the second inclined groove 2801 and the second straight groove 2802. When the column 20 is located in the second inclined groove 2801, it slides with the driven plate 28, prompting the driven plate 28 to drive the telescopic plate 30 to slide toward the outside of the guide plate 29. After the column 20 enters the second straight groove 2802, the through hole 3001 coincides with the first vertical tube 5 and the second vertical tube 7, thereby opening the feeding passage, so that the medicine in the feed hopper 4 can fall into the cylinder 3.

[0077] After each crushing is completed, in the latter part of the stroke when the transverse plate 17 is reset, the column 20 can cause the telescopic plate 30 to retract toward the inside of the guide plate 29 through the second inclined groove 2801. As a result, the through hole 3001 is staggered with the first vertical pipe 5 and the second vertical pipe 7, and the first vertical pipe 5 and the second vertical pipe 7 are blocked, thereby preventing the powder from being blown out through the first vertical pipe 5 when the back-blowing mechanism is working.

[0078] As another embodiment of the present invention, a drug pulverization method is also proposed, which uses the circulating drug pulverization device based on secondary pulverization, including the following steps:

[0079] Step 1: placing the medicine to be processed into the hopper 4;

[0080] Step 2: The lifting drive mechanism works to drive the cylinder 3 to rise, the conduction control mechanism is triggered, the feeding passage is connected, and the medicine falls into the cylinder 3;

[0081] Step 3: The power mechanism works to drive the cylinder 3 to rotate, entering the primary crushing process;

[0082] Step 4: After the primary crushing is completed, the cylinder 3 descends and resets, the conduction control mechanism blocks the feed passage, and the back-blowing mechanism works to blow the powder into the cyclone dust collector for collection;

[0083] Step 5: The lifting drive mechanism drives the cylinder 3 to rise again, and the rising stroke of the cylinder 3 increases, entering the secondary crushing process;

[0084] Step 6: After the secondary crushing is completed, the cylinder 3 descends and resets, and the back-blowing mechanism works to blow the remaining powder into the cyclone dust collector for collection.

[0085] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0086] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A circulating medicine pulverizing device based on secondary pulverization, comprising a first cabinet (1) and a second cabinet (2) arranged on the side of the first cabinet (1), wherein the second cabinet (2) is provided with a cyclone dust collector for collecting pulverized powder; It is characterized by: Also includes: A cylinder (3) is movably arranged in the first cabinet (1), and a grinding disc (8) is arranged in the cylinder (3), the grinding disc (8) is in sealing and sliding contact with the inner wall of the cylinder (3), and the grinding disc (8) is connected to a feed hopper (4) arranged on the first cabinet (1) through a feed passage; A lifting drive mechanism is installed in the first cabinet (1) and is connected to the cylinder (3). The lifting drive mechanism can drive the cylinder (3) to rise so that the medicine entering the cylinder (3) through the feeding passage contacts the bottom of the grinding disc (8), and the cylinder (3) can be driven to rotate by a power mechanism arranged in the first cabinet (1) to perform primary and secondary crushing on the medicine in the cylinder (3); A back-blowing mechanism and a conduction control mechanism are respectively connected to the cylinder (3) and the feed passage. The conduction control mechanism cooperates with the lifting drive mechanism. When a primary crushing process is completed, the conduction control mechanism can switch the feed passage from a conduction state to a blocking state, and the back-blowing mechanism blows the powder in the cylinder (3) through the transfer passage to the cyclone dust collector. In the secondary crushing process, the lifting drive mechanism drives the cylinder (3) to increase its upward travel. The back-blowing mechanism comprises an air ring (11) connected to the cylinder (3) in a sealing and rotatable manner, and a bellows (12) connected to the air ring (11), wherein the air ring (11) is connected to the lifting drive mechanism; The lifting drive mechanism comprises a transverse plate (17) movably arranged in the first cabinet (1), the transverse plate (17) can be driven by a threaded drive assembly arranged in the first cabinet (1) to reciprocate, and the reciprocating stroke of the transverse plate (17) is fixed; The transverse plate (17) is provided with a guide groove (1701), a slider (18) is slidably engaged in the guide groove (1701), the slider (18) is connected to a transposition structure installed on the transverse plate (17), and the slider (18) is connected to the air ring (11) via a sliding fitting assembly; The sliding fitting assembly includes a connecting plate (13) provided in the first cabinet (1) and capable of being raised and lowered in the first cabinet (1), the connecting plate (13) being provided with a first through slot, a driving column (19) being fixed on the slider (18), the driving column (19) passing through the first through slot and being slidably connected to the connecting plate (13), the first through slot including a first straight slot (1301) and a first inclined slot (1302) being connected, and the connecting plate (13) being connected to the air ring (11) via two sets of elastic connection structures; After a crushing process is completed, the threaded drive assembly drives the transverse plate (17) to move toward the second cabinet (2) and reset. In the latter part of the process, the transposition structure is triggered, causing the slider (18) to slide in the guide groove (1701), thereby increasing the initial distance between the drive column (19) and the second cabinet (2).

2. A circulating drug pulverizing device based on secondary pulverization according to claim 1, characterized in that: The material transfer passage comprises an inclined pipe (6) fixed in the first cabinet (1) and connected to the cyclone dust collector at one end, and a second vertical pipe (7) connected to the other end of the inclined pipe (6), the second vertical pipe (7) being fixed to the grinding disc (8), and a filter disc (601) being provided in the inclined pipe (6); The feed passage comprises a first vertical pipe (5) connected to the feed hopper (4); the first vertical pipe (5) and the second vertical pipe (7) are concentric, and a gap is reserved between the two; the conduction control mechanism is located in the gap.

3. A circulating drug pulverizing device based on secondary pulverization according to claim 2, characterized in that: One end of the bellows (12) away from the air ring (11) is connected to the air pump outlet provided in the second cabinet (2), and a plurality of inclined air holes (301) in communication with the air ring (11) are provided on the cylinder (3) at equal intervals along the circumference.

4. The circulating drug pulverizing device based on secondary pulverization according to claim 1, characterized in that: The elastic connection structure comprises a connecting arm (14) fixed on the connecting plate (13), a guide column (15) fixed on the connecting arm (14), and a cylindrical spring (16) sleeved on the outer periphery of the guide column (15); the guide column (15) passes through a lug (1101) formed on the outer wall of the air ring (11) and is slidably connected to the lug (1101); and the two ends of the cylindrical spring (16) are respectively connected to the lug (1101) and the connecting arm (14).

5. The circulating drug pulverizing device based on secondary pulverization according to claim 1, characterized in that: The shifting structure comprises a cam (22) rotatably mounted on the transverse plate (17), a boss (2201) fixed on the cam (22), and a ratchet (23) fixedly mounted coaxially with the cam (22); a transmission rod (21) is fixed on a side of the slider (18) away from the driving column (19); a sliding groove (2101) is provided on the transmission rod (21); the boss (2201) extends into the sliding groove (2101) and is slidably connected to the transmission rod (21); The rotating shaft of the cam (22) is further connected to a limiting structure provided on the transverse plate (17), and a ratchet plate (24) cooperating with the ratchet wheel (23) is fixedly installed in the first cabinet (1).

6. The circulating drug pulverizing device based on secondary pulverization according to claim 5, characterized in that: The limiting structure comprises an elastic telescopic rod (25) mounted on the rotating shaft of the cam (22) and a limiting wheel (26) provided at the movable end of the elastic telescopic rod (25); a limiting disk (27) is fixed on the transverse plate (17); and two limiting protrusions (2701) are relatively provided in the limiting disk (27); the limiting wheel (26) abuts against the limiting protrusions (2701).

7. The circulating drug pulverizing device based on secondary pulverization according to claim 2, characterized in that: The conduction control mechanism comprises a guide plate (29) fixed on the inner wall of the first cabinet (1) and a telescopic plate (30) slidably fitted with the guide plate (29), the telescopic plate (30) being sealingly and slidably connected to the first vertical pipe (5) and the second vertical pipe (7), and a through hole (3001) is provided on the telescopic plate (30); The telescopic plate (30) is further fixedly connected to a driven plate (28), and a second through-slot is provided on the driven plate (28), and the second through-slot is adapted to a column (20) fixedly provided on the transverse plate (17), and the column (20) passes through the second through-slot and is slidably connected to the driven plate (28), and the second through-slot includes a second inclined slot (2801) and a second straight slot (2802) connected to each other.

8. A drug pulverization method, using the circulating drug pulverization device based on secondary pulverization according to claim 1, characterized in that: The following steps are involved: Step 1: placing the drug to be processed into the feed hopper (4); Step 2: The lifting drive mechanism operates to drive the cylinder (3) to rise, and the conduction control mechanism is triggered to connect the feeding passage, so that the medicine falls into the cylinder (3); Step 3: The power mechanism starts to work, driving the cylinder (3) to rotate, and entering the primary crushing process; Step 4: After the primary crushing is completed, the cylinder (3) descends and resets, the conduction control mechanism blocks the feed passage, and the back-blowing mechanism works to blow the powder into the cyclone dust collector for collection; Step 5: The lifting drive mechanism drives the cylinder (3) to rise again, and the rising stroke of the cylinder (3) increases, entering the secondary crushing process; Step 6: After the secondary crushing is completed, the cylinder (3) descends and resets, and the back-blowing mechanism works to blow the remaining powder into the cyclone dust collector for collection.

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