Traditional Chinese medicine material powder separation device

Abstract

The utility model relates to traditional chinese medicinal material powder beating screening technical field, concretely is traditional chinese medicinal material powder beating after thickness separation device, including the horizontal setting base plate, the material collecting box is fixedly connected on the base plate upper surface along the vertical direction and its top opening place horizontal cover is equipped with a primary filter screen, the guide rod is two and along the horizontal direction parallel extension and respectively through the mounting block fixed assembly in the width direction both sides of material collecting box top, the support column is two and respectively along the vertical direction slidingly covered in the corresponding guide rod outer surface. The utility model, the reciprocating drive assembly of device equipment, through first motor drive transmission wheel, synchronous belt drive, cooperation rotating disc and pull the rod tow support column reciprocating sliding along the guide rod, and then drive secondary filter screen horizontal reciprocating movement produces the vibration, can effectively avoid the medicine powder to accumulate on the secondary filter screen, accelerate the speed that the powder passes through the filter screen, significantly improve the screening efficiency, and the vibration effect also can reduce the filter screen blockage situation, prolong the service life of filter screen.

Description

Technical Field

[0001] This utility model relates to the field of traditional Chinese medicine powdering and screening technology, and in particular to a device for separating coarse and fine powders after traditional Chinese medicine powdering. Background Technology

[0002] In the field of Chinese medicinal herb processing, after Chinese medicinal herbs are ground into powder, they need to undergo coarse-fine separation to meet the requirements of different application scenarios for the fineness of the powder. For example, fine powder is often used to prepare preparations such as pills and powders, while coarse powder needs to be returned to the grinding equipment for re-grinding.

[0003] Current commercially available devices for separating coarse and fine Chinese medicinal herbs after grinding have shortcomings: during the screening process, the powder tends to accumulate on the filter screen, and existing devices lack effective vibration or reciprocating drive structures, resulting in low screening efficiency and easy clogging of the filter screen due to accumulation. This problem restricts the efficiency and quality of coarse and fine separation after grinding Chinese medicinal herbs, making it difficult to meet the needs of large-scale and refined processing of Chinese medicinal herbs. Utility Model Content

[0004] The purpose of this utility model is to solve the technical problems mentioned above, and to propose a device for separating coarse and fine powders of Chinese medicinal materials after grinding.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a device for separating coarse and fine powders of Chinese medicinal materials, comprising a horizontally arranged base plate, a collection box fixedly connected vertically to the upper surface of the base plate with a primary filter screen horizontally covered at its top opening, two guide rods extending parallel horizontally and respectively fixedly assembled to both sides of the top of the collection box in the width direction by mounting blocks, two support columns slidingly sleeved on the outer surface of the corresponding guide rods in the vertical direction, a secondary filter screen horizontally located directly above the primary filter screen, and a lifting assembly assembled at the top of the collection box near one end of the secondary filter screen in the length direction for driving the secondary filter screen. The filter screen moves vertically up and down. The reciprocating drive assembly is mounted on the top of the collection box near the other end of the secondary filter screen along its length. It drives the support column to slide back and forth along the length of the guide rod, thereby driving the secondary filter screen to screen back and forth. The temporary storage box is horizontally adjacent to the side of the collection box near the lifting assembly, and its top opening corresponds to the discharge end of the secondary filter screen when it is tilted. It is used to collect unqualified medicinal materials on the secondary filter screen. The support frame is fixedly mounted vertically on the outer wall of the collection box near the reciprocating drive assembly. The storage hopper is fixedly mounted on the top of the support frame, and its bottom discharge port corresponds to the feed end of the secondary filter screen. It is used to store the powder of Chinese medicinal materials to be screened.

[0006] Preferably, a climbing ladder is fixedly mounted on the outer side wall of the support frame along its height direction, and a solenoid valve is mounted vertically at the discharge port at the bottom of the storage hopper to control the opening and closing of the discharge port.

[0007] Preferably, the reciprocating drive assembly includes a first motor, which is horizontally mounted on the top of the collection box near the support column. The rotating shaft is horizontal and parallel to the output shaft of the first motor and is mounted on the top of the collection box away from the first motor. There are two transmission wheels, which are coaxially fixedly connected to the end of the output shaft of the first motor and the rotating shaft, respectively. A synchronous belt is sleeved on the outer periphery of the two transmission wheels to form a horizontal synchronous transmission engagement. There are two sets of reciprocating moving parts, which are respectively mounted on the top of the two transmission wheels for rotating with the transmission wheels and pushing the support column to slide back and forth along the guide rod.

[0008] Preferably, each set of reciprocating moving parts includes a rotating disk and a pulling rod. The rotating disk is coaxially fixed on the transmission wheel, and one end of the pulling rod is hinged to the edge of the upper surface of the rotating disk, while the other end is hinged to a pre-set connecting piece on the outer wall of the support column.

[0009] Preferably, the lifting assembly includes a mounting frame, a vertical pole, and a lifting rod. The mounting frame is fixed vertically to the outer wall of the collection box on the side away from the support column. The vertical pole is fixed vertically to the outer wall of the mounting frame on the other side of the collection box and is arranged opposite to the mounting frame in the horizontal direction. The lifting rod is horizontally spanned between the mounting frame and the vertical pole, with one end slidingly engaged with the vertical pole. The other end of the lifting rod extends to the inner side of the mounting frame, and the end of the secondary filter screen away from the support column rests on the upper surface of the lifting rod.

[0010] Preferably, the lifting assembly further includes a second motor, a threaded shaft, and a threaded sleeve block. The second motor is fixed to the top of the mounting frame in a vertical direction and its output shaft extends in a vertical direction. The threaded shaft is coaxially fixed to the end of the output shaft of the second motor and extends in a vertical direction. The threaded sleeve block is threadedly engaged with the threaded shaft and its outer side wall is fixedly connected to the end of the lifting rod away from the upright.

[0011] Preferably, the inside of the collection box is fixedly equipped with two parallel guide rails along its length, and a drawer is slidably connected between the two guide rails along the length of the guide rails. The drawer is located directly below the primary filter screen and is used to collect impurities and dust that fall off during the screening of medicinal materials.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, by setting a double-layer filtration structure of a primary filter and a secondary filter, and the mesh size of the secondary filter is smaller than that of the primary filter, two-stage grading and screening of medicinal powder can be achieved, which can effectively improve the screening accuracy, ensure that there are no coarse particles mixed in the fine powder and the content of fine powder is low in the coarse powder, meet the requirements of different processing scenarios for the fineness of medicinal materials, and improve the quality of subsequent processed medicinal products.

[0013] 2. In this utility model, the reciprocating drive component of the device drives the transmission wheel and synchronous belt through the first motor, and cooperates with the rotating disk and the pulling rod to pull the support column to slide back and forth along the guide rod, thereby driving the secondary filter screen to move horizontally back and forth to generate vibration. This can effectively prevent the accumulation of medicinal powder on the secondary filter screen, speed up the speed of powder passing through the filter screen, significantly improve the screening efficiency, and at the same time, the vibration effect can also reduce the clogging of the filter screen and extend the service life of the filter screen.

[0014] 3. In this utility model, the lifting component can adjust the tilt of the secondary filter screen. When coarse medicinal materials remain on the secondary filter screen, the threaded shaft is driven to rotate by the second motor, which drives the lifting rod to slide down and tilt the secondary filter screen. The coarse medicinal materials can automatically slide down the tilted filter screen to the temporary storage box without manual cleaning, reducing the labor intensity of operators. The cleaning is timely and efficient, avoiding affecting the continuity of screening. Attached Figure Description

[0015] Figure 1 This utility model presents a three-dimensional structural schematic diagram of a device for separating coarse and fine powders of Chinese medicinal materials after grinding. Figure 2 This is a schematic diagram of another angle of the coarse and fine separation device for Chinese medicinal materials after pulverizing. Figure 3 This utility model proposes a device for separating coarse and fine powders from Chinese medicinal materials after grinding. Figure 2 Schematic diagram of the structure at point A; Figure 4 This utility model proposes a device for separating coarse and fine powders from Chinese medicinal materials after grinding. Figure 1 Schematic diagram of the structure at point B; Legend: 1. Base plate; 2. Collection box; 21. Drawer; 3. Primary filter; 4. Reciprocating drive assembly; 41. First motor; 42. Rotary shaft; 43. Transmission wheel; 44. Synchronous belt; 45. Rotary disc; 46. Pull rod; 5. Lifting assembly; 51. Mounting bracket; 52. Second motor; 53. Threaded shaft; 54. Threaded sleeve block; 55. Lifting rod; 56. Upright pole; 6. Secondary filter; 7. Support frame; 8. Climbing ladder; 9. Storage hopper; 10. Temporary storage box; 11. Guide rod; 12. Support column. Detailed Implementation

[0016] Please see Figure 1-4 This utility model provides a technical solution: a device for separating coarse and fine Chinese medicinal materials after grinding, including a horizontally arranged base plate 1. The base plate 1 is made of metal to ensure the load-bearing stability of the entire device. Its lower surface can be fitted with anti-slip pads according to the actual use scenario to prevent the device from shifting due to vibration during operation. The upper surface of the base plate 1 is fixedly connected to the bottom of the collection box 2 to provide a stable foundation for the subsequent assembly of various components.

[0017] The collection box 2 is fixedly connected to the upper surface of the base plate 1 in a vertical direction. The collection box 2 is made of metal sheet by welding. The top has an open structure to accommodate the installation of the primary filter screen 3. The collection box 2 and the base plate 1 can be fixed by welding or bolt connection. The primary filter screen 3 is horizontally covered at the top opening of the collection box 2. Multiple mounting holes are evenly distributed on the edge of the primary filter screen 3. Bolts are passed through the mounting holes to fix it to the top edge of the collection box 2 to ensure that the primary filter screen 3 will not loosen or shift during the screening process. At the same time, the mesh size of the primary filter screen 3 can be selected according to the actual screening requirements and is used to further filter the medicinal powder after screening by the secondary filter screen 6.

[0018] There are two guide rods 11 that extend horizontally in parallel. Both guide rods 11 are made of high-strength metal to bear the weight of the support column 12 and the secondary filter screen 6, as well as the force generated by the reciprocating sliding. The two ends of the guide rods 11 are fixedly mounted to the two sides of the top of the collection box 2 in the width direction by mounting blocks. The mounting blocks are made of metal and are fixed to the top side wall of the collection box 2 by screws. The two ends of the guide rods 11 are connected to the mounting blocks by threaded engagement to ensure that the guide rods 11 always remain horizontal and to avoid affecting the sliding accuracy of the support column 12 due to the tilt of the guide rods 11.

[0019] There are two support columns 12, which are slidably fitted onto the outer surface of the corresponding guide rod 11 in the vertical direction. The support columns 12 are made of metal and the inner wall can be coated with a wear-resistant coating to reduce sliding friction with the guide rod 11 and extend the service life of the components. The height of the support column 12 is set according to the installation height requirements of the secondary filter screen 6. The support column 12 has a pre-reserved shaft mounting hole on its inner side wall for connecting to both ends of the secondary filter screen 6 in the width direction.

[0020] The secondary filter 6 is horizontally positioned directly above the primary filter 3. The mesh size of the secondary filter 6 is smaller than that of the primary filter 3, enabling the coarse and fine classification of the medicinal powder. The two ends of the secondary filter 6 in the width direction are rotatably connected to the inner sidewalls of two support columns 12 via shafts. The shafts are made of metal and pass through the mounting holes of the support columns 12 and the assembly holes on the edge of the secondary filter 6. The two ends of the shafts are limited by retaining springs to prevent the shafts from falling off during the rotation of the secondary filter 6, ensuring that the secondary filter 6 can rotate flexibly around the shafts.

[0021] The lifting assembly 5 is mounted on the top of the collection box 2 near one end of the secondary filter screen 6 along its length. The lifting assembly 5 includes a mounting frame 51, a vertical rod 56, and a lifting rod 55. The mounting frame 51 is a metal frame structure and is fixed to the outer wall of the collection box 2 by bolts. The vertical rod 56 is a metal rod and is fixed vertically to the top of the collection box 2 on the side opposite to the mounting frame 51. The bottom of the vertical rod 56 is fixed to the top of the collection box 2 by welding. The lifting rod 55 is horizontally spanned between the mounting frame 51 and the vertical rod 56. A metal sliding sleeve is fixed to one end of the lifting rod 55 near the vertical rod 56. The sliding sleeve is fitted onto the outer surface of the vertical rod 56, allowing the lifting rod 55 to slide vertically along the vertical rod 56. The end of the lifting rod 55 away from the vertical rod 56 extends to the inner side of the mounting frame 51 to support one end of the secondary filter screen 6.

[0022] The reciprocating drive assembly 4 is mounted on the top of the collection box 2 near the other end of the secondary filter screen 6 along its length. The reciprocating drive assembly 4 includes a first motor 41, a rotating shaft 42, transmission wheels 43, a synchronous belt 44, and reciprocating moving parts. The first motor 41 is fixed to the top of the collection box 2 by a metal motor mount, which is bolted to the top of the collection box 2. The rotating shaft 42 is horizontal and parallel to the output shaft of the first motor 41. It is mounted on the top of the collection box 2 away from the first motor 41 by a metal bearing seat. The bearing seat is fitted with rolling bearings to ensure smooth rotation of the rotating shaft 42. There are two transmission wheels 43, which are coaxially fixed to the end of the output shaft of the first motor 41 and the end of the rotating shaft 42 near the first motor 41, respectively. 3. All are of the same specification and are synchronous pulleys. The synchronous belt 44 is sleeved on the outer periphery of the two transmission pulleys 43. The teeth on the inner side of the synchronous belt 44 mesh with the tooth grooves of the transmission pulleys 43 to achieve synchronous transmission. There are two sets of reciprocating moving parts, which are respectively assembled on the top of the two transmission pulleys 43. Each set of reciprocating moving parts includes a rotating disk 45 and a pulling rod 46. The rotating disk 45 is a circular metal disk and is fixed to the upper surface of the transmission pulley 43 by welding. The pulling rod 46 is a metal rod with hinge holes at both ends. One end is hinged to the edge of the upper surface of the rotating disk 45 by a pin, and the other end is hinged to the connector pre-set on the outer wall of the support column 12 by a pin. The connector is a metal ear plate and is welded to the outer wall of the support column 12. The two ends of the pin are limited by cotter pins to prevent the hinge from falling off.

[0023] The temporary storage box 10 is arranged horizontally adjacent to the collection box 2 on the side near the lifting assembly 5. The temporary storage box 10 is a metal box with an open top and is placed on the upper surface of the base plate 1. The upper edge of the temporary storage box 10 is slightly lower than the lowest point of the secondary filter screen 6 when it is tilted, so as to ensure that the unqualified medicinal materials on the secondary filter screen 6 can slide smoothly into the interior of the temporary storage box 10. The interior of the temporary storage box 10 can be equipped with a partition as needed to classify and collect unqualified medicinal materials from different batches.

[0024] The support frame 7 is fixedly mounted vertically on the outer wall of the collection box 2 near the reciprocating drive component 4. The support frame 7 is a metal frame structure and is connected to the outer wall of the collection box 2 by expansion bolts to ensure the stability of the support frame 7. The storage hopper 9 is fixedly mounted on the top of the support frame 7. The storage hopper 9 is a conical metal hopper and the inner wall is polished to reduce the residue of medicinal powder on the hopper wall. The bottom discharge port of the storage hopper 9 is directly above the feed end of the secondary filter screen 6, which makes it easy for the medicinal powder to fall accurately onto the secondary filter screen 6.

[0025] A climbing ladder 8 is fixedly mounted on the outer side wall of the support frame 7 along its height direction. The steps of the climbing ladder 8 are metal rods and both ends are welded to the vertical rods of the support frame 7. The spacing between the steps is designed according to ergonomics to facilitate operators to go up and down the support frame 7 to add materials or maintain the storage hopper 9.

[0026] A solenoid valve is installed vertically at the discharge port at the bottom of the storage hopper 9. The solenoid valve is a normally closed solenoid valve and is connected to an external control switch through a wire. The operator can adjust the opening and closing status and degree of opening and closing of the solenoid valve through the control switch, thereby controlling the discharge speed and amount of medicinal powder, and avoiding the accumulation of medicinal materials on the secondary filter screen 6 due to excessive discharge.

[0027] The lifting assembly 5 also includes a second motor 52, a threaded shaft 53, and a threaded sleeve block 54. The second motor 52 is fixed vertically to the top of the mounting bracket 51 and is connected to the metal plate on the top of the mounting bracket 51 by bolts. The threaded shaft 53 is coaxially fixedly connected to the end of the output shaft of the second motor 52 and extends vertically. The threaded shaft 53 and the output shaft of the second motor 52 are connected by a coupling to ensure their coaxiality and avoid deviation during transmission. The threaded sleeve block 54 is threadedly engaged with the threaded shaft 53, and its outer wall is fixedly connected to the end of the lifting rod 55 away from the upright 56 ​​by welding. The inner wall of the threaded sleeve block 54 is provided with an internal thread that matches the threaded shaft 53 to ensure smooth thread transmission.

[0028] The inside of the collection box 2 is fixedly equipped with two parallel guide rails along its length. The guide rails are metal and are fixed to the inner side wall of the collection box 2 by screws. A drawer is slidably connected between the two guide rails along the length of the guide rails. The drawer is a metal drawer and a metal handle is fixed on the front panel for easy operation. The drawer is located directly below the primary filter screen 3. A dustproof pad can be laid inside the drawer to prevent small impurities from leaking out from the drawer gaps and to facilitate subsequent cleaning of impurities and dust.

[0029] Working principle When using this Chinese herbal medicine powder separation device, first load the powder of the Chinese herbal medicine to be screened into the storage hopper 9. The operator adjusts the solenoid valve at the discharge port of the storage hopper 9 through the external control switch to control the solenoid valve to open to an appropriate degree, so that the powder of the Chinese herbal medicine falls from the discharge port into the upper surface of the secondary filter screen 6 below at a uniform speed, avoiding local accumulation of the powder of the Chinese herbal medicine on the secondary filter screen 6.

[0030] The first motor 41 in the reciprocating drive assembly 4 is started. The output shaft of the first motor 41 drives the transmission wheel 43, which is fixed coaxially with it, to rotate. The transmission wheel 43 drives the transmission wheel 43 on the other side and the rotating shaft 42 to rotate synchronously through the synchronous belt 44. During the rotation of the two transmission wheels 43, the rotating disk 45 fixed on them rotates synchronously. When the rotating disk 45 rotates, it generates a traction force on the support column 12 through the pull rod 46 hinged at both ends, causing the support column 12 to slide back and forth along the length of the guide rod 11. During the sliding of the support column 12, it drives the secondary filter 6, which is rotatably connected to it through the shaft, to move horizontally back and forth synchronously. The back and forth movement of the secondary filter 6 generates a vibration effect, which causes the Chinese herbal medicine powder falling on its surface to disperse quickly. Among them, qualified powder with a particle size smaller than the mesh size of the secondary filter 6 passes through the secondary filter 6 and falls to the upper surface of the primary filter 3 below.

[0031] The medicinal powder falling onto the primary filter screen 3 continues to be screened. Fine powder with a particle size smaller than the mesh size of the primary filter screen 3 passes through the primary filter screen 3 and falls into the collection box 2 for collection, while medium-sized impurities with a particle size larger than the mesh size of the primary filter screen 3 remain on the upper surface of the primary filter screen 3, thus achieving coarse and fine classification of the medicinal powder.

[0032] When a large number of coarse medicinal materials with particle sizes larger than the mesh size remain on the secondary filter screen 6, the solenoid valves of the first motor 41 and the storage hopper 9 are first closed to stop the delivery of medicinal materials and the reciprocating vibration of the secondary filter screen 6. Then, the second motor 52 in the lifting assembly 5 is started. The output shaft of the second motor 52 drives the threaded shaft 53 connected to it via a coupling to rotate around its own axis. Since the end of the lifting rod 55 near the upright 56 ​​is in sliding engagement with the upright 56 ​​through a sliding sleeve, the lifting rod 55 is limited by the vertical direction of the upright 56 ​​and cannot rotate with the threaded shaft 53. Therefore, the threaded sleeve block 54, which is threadedly engaged with the threaded shaft 53, slides vertically downward along the threaded shaft 53. During the sliding process, the threaded sleeve block 54 drives the lifting rod 55, which is fixedly connected to it, to slide down vertically in sync. When the lifting rod 55 slides down, the end of the secondary filter screen 6 away from the support column 12 moves downward with the lifting rod 55 and rotates downward around the shaft on the support column 12, so that the secondary filter screen 6 is in an inclined state.

[0033] The inclined secondary filter 6 provides a guiding channel for the coarse medicinal materials remaining on its surface. Under its own gravity, the coarse medicinal materials slide along the inclined surface of the secondary filter 6 and eventually fall into the temporary storage box 10 located next to the collection box 2, thus completing the collection of unqualified medicinal materials.

[0034] During the entire screening process, fine impurities and dust generated during the screening of medicinal powder will fall along with the qualified powder, passing through the primary filter screen 3 and falling into the drawer inside the collection box 2. When the screening work is completed or the impurities in the drawer accumulate to a certain amount, the operator can pull the handle on the front panel of the drawer to pull the drawer out from inside the collection box 2 along the guide rail, clean the impurities and dust collected in the drawer, and push the drawer back into the collection box 2 after cleaning. This completes one full operation of separating coarse and fine powders after grinding Chinese medicinal materials, preparing for the next screening.

Claims

1. A device for separating coarse and fine powders of Chinese medicinal materials after grinding, comprising a horizontally arranged base plate (1), characterized in that: The collection box (2) is fixedly connected to the upper surface of the base plate (1) in the vertical direction, and a primary filter screen (3) is horizontally covered at its top opening. There are two guide rods (11) that extend parallel in the horizontal direction and are fixedly assembled on both sides of the width direction of the top of the collection box (2) by mounting blocks. There are two support columns (12) that slide vertically on the outer surface of the corresponding guide rods (11). The secondary filter screen (6) is horizontally located directly above the primary filter screen (3). The lifting component (5) is assembled at the top of the collection box (2) near one end of the secondary filter screen (6) in the length direction to drive the secondary filter screen (6) to rise and fall vertically at this end. The reciprocating drive component (4) is assembled on the top of the collection box (2). The position near the other end of the length direction of the secondary filter (6) is used to drive the support column (12) to slide back and forth along the length direction of the guide rod (11), thereby driving the secondary filter (6) to screen back and forth. The temporary storage box (10) is arranged horizontally adjacent to the side of the collection box (2) near the lifting component (5), and its top opening corresponds to the feeding end of the secondary filter (6) when it is tilted, and is used to collect unqualified medicinal materials on the secondary filter (6). The support frame (7) is fixedly assembled vertically on the outer wall of the collection box (2) near the reciprocating drive component (4). The storage hopper (9) is fixedly assembled on the top of the support frame (7), and its bottom feeding port corresponds to the feeding end of the secondary filter (6), and is used to store the Chinese medicinal powder to be screened.

2. The device for separating coarse and fine powders of Chinese medicinal materials according to claim 1, characterized in that; A climbing ladder (8) is fixedly installed on the outer wall of the support frame (7) along its height direction, and a solenoid valve is installed at the bottom of the hopper (9) in the vertical direction to control the opening and closing of the discharge port.

3. The device for separating coarse and fine powders of Chinese medicinal materials according to claim 1, characterized in that; The reciprocating drive assembly (4) includes a first motor (41), which is horizontally mounted on the top of the collection box (2) near the support column (12). The rotating shaft (42) is horizontal and parallel to the output shaft of the first motor (41) and mounted on the top of the collection box (2) away from the first motor (41). There are two transmission wheels (43), which are coaxially fixedly connected to the end of the output shaft of the first motor (41) and the rotating shaft (42). The synchronous belt (44) is sleeved on the outer periphery of the two transmission wheels (43) to form a horizontal synchronous transmission engagement. There are two sets of reciprocating moving parts, which are respectively mounted on the top of the two transmission wheels (43) for rotating with the transmission wheels (43) and pushing the support column (12) to slide back and forth along the guide rod (11).

4. The device for separating coarse and fine powders of Chinese medicinal materials according to claim 3, characterized in that; Each set of reciprocating moving parts includes a rotating disk (45) and a pulling rod (46). The rotating disk (45) is coaxially fixed on the transmission wheel (43). One end of the pulling rod (46) is hinged to the edge of the upper surface of the rotating disk (45), and the other end is hinged to a pre-set connector on the outer side wall of the support column (12).

5. The device for separating coarse and fine powders of Chinese medicinal materials according to claim 1, characterized in that; The lifting assembly (5) includes a mounting frame (51), a vertical pole (56), and a lifting rod (55). The mounting frame (51) is fixed vertically to the outer wall of the collection box (2) away from the support column (12). The vertical pole (56) is fixed vertically to the outer wall of the collection box (2) corresponding to the mounting frame (51) and is arranged opposite to the mounting frame (51) in the horizontal direction. The lifting rod (55) is horizontally spanned between the mounting frame (51) and the vertical pole (56), and one end of the lifting rod (55) slides with the vertical pole (56) in the vertical direction. The other end of the lifting rod (55) extends to the inner side of the mounting frame (51), and the end of the secondary filter (6) away from the support column (12) rests on the upper surface of the lifting rod (55).

6. The device for separating coarse and fine powders of Chinese medicinal materials according to claim 5, characterized in that; The lifting assembly (5) also includes a second motor (52), a threaded shaft (53), and a threaded sleeve block (54). The second motor (52) is fixed to the top of the mounting bracket (51) in the vertical direction and its output shaft extends in the vertical direction. The threaded shaft (53) is coaxially fixed to the end of the output shaft of the second motor (52) and extends in the vertical direction. The threaded sleeve block (54) is threadedly engaged with the threaded shaft (53) and its outer wall is fixedly connected to the end of the lifting rod (55) away from the upright (56).

7. The device for separating coarse and fine powders of Chinese medicinal materials according to claim 1, characterized in that; The inside of the collection box (2) is fixedly equipped with two parallel guide rails along its length. A drawer (21) is slidably connected between the two guide rails along the length of the guide rails. The drawer (21) is located directly below the primary filter screen (3) and is used to collect impurities and dust that fall off during the screening of medicinal materials.

Images