A multi-stage screening device for Chinese medicine raw materials

Abstract

The present invention relates to the technical field of screening devices, and discloses a multi-stage screening device for Chinese medicine raw materials, comprising a screening box, a plurality of sieve plates arranged in the screening box, and a plurality of vibration components for driving the sieve plates to vibrate, wherein a plurality of connecting seats and a plurality of supporting components for supporting the connecting seats are arranged in the screening box, the sieve plates are connected to the connecting seats through the connecting components, and the vibration components comprise a vibration block and a connecting frame; the present invention cooperates with a roller in a driving mechanism and a convex block on the vibration block, and when the roller rotates, it hits the convex block one by one to push the vibration block to move horizontally, and cooperates with a reset component to realize the reset of the vibration block, so that the sieve plates can vibrate horizontally in multiple directions. Compared with the traditional method of driving the sieve plates to vibrate by a vibration motor, the vibration amplitude of the sieve plates is larger. At the same time, due to the large vibration amplitude, the rotation speed of the driving drum is reduced, thereby effectively reducing the noise of the device and effectively improving the screening efficiency of the Chinese medicine raw materials.

Description

Technical Field

[0001] The invention relates to the technical field of screening devices, in particular to a multi-stage screening device for traditional Chinese medicine raw materials. Background Art

[0002] Chinese medicine raw materials refer to natural animals, plants, minerals and their processed products used to prepare Chinese herbal medicine slices and Chinese medicine preparations. They cover the roots, stems, leaves, flowers, fruits, seeds of plants, animal organs, secretions, and naturally formed or processed minerals. They are characterized by a wide range of sources, complex ingredients and diverse medicinal properties. Their quality directly affects the clinical efficacy of Chinese medicine.

[0003] The multi-stage screening device for Chinese herbal medicine raw materials is a screening device designed specifically for the characteristics of Chinese herbal medicine raw materials. It primarily utilizes multiple layers of screens, using vibration and rolling methods to grade and screen raw materials of varying particle sizes and shapes. The device typically includes a feed mechanism, a multi-layer screen assembly, and a power drive system. The screen aperture size can be customized (e.g., coarse, medium, and fine screens) to remove impurities and foreign matter from the raw materials and accurately grade the particles. This improves the purity and uniformity of the raw materials, facilitates subsequent processing, and ensures the quality and stability of Chinese medicine. It is widely used in the primary processing of Chinese herbal medicines and the production of medicinal slices.

[0004] In the prior art, when screening Chinese medicine raw materials, multiple sieve trays are generally set from top to bottom, and multi-stage screening is performed by setting sieves of different mesh sizes in the multiple sieve trays. During screening, the Chinese medicine raw materials are put into the uppermost sieve tray, and the vibration of the sieve tray causes the Chinese medicine raw materials with particle sizes smaller than the sieve holes to fall downward. The vibration of the sieve tray is generally driven by a vibration motor. Due to the high speed of the vibration motor, the noise of the device is often large, and the vibration amplitude of the vibration motor is small, which makes the movement amplitude of the sieve tray small, resulting in reduced screening efficiency. In addition, manual observation is required to determine whether each sieve tray continues to drop material to determine whether the screening is completed. It is impossible to automatically determine whether the screening process is completed, and it is impossible to select the number of sieve trays required according to demand.

[0005] Therefore, it is necessary to provide a multi-stage screening device for Chinese medicine raw materials to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a multi-stage screening device for Chinese medicine raw materials. By coordinating the rollers in the driving mechanism with the protrusions on the vibration block and cooperating with the reset component to reset the vibration block, the sieve plate can vibrate horizontally in multiple directions. Compared with the traditional method of driving the sieve plate to vibrate by a vibration motor, the vibration amplitude of the sieve plate is larger.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: a multi-stage screening device for Chinese medicine raw materials, comprising a screening box, a plurality of sieve plates arranged in the screening box and a plurality of vibration assemblies for driving the sieve plates to vibrate, the screening box being provided with a plurality of connecting seats and a plurality of support assemblies for supporting the connecting seats, the inner wall of the screening box being fixedly mounted with a pressure sensor for weighing the support assembly and the structure on the support assembly, the sieve plates being connected to the connecting seats through the connecting assembly, the vibration assembly comprising a vibration block and a connecting frame, the vibration block being fixedly connected to the connecting seat through the connecting frame, a circular through hole being provided in the vibration block, a plurality of protrusions being provided in the circular through hole, a driving mechanism being provided in the screening box, the driving mechanism comprising a driving cylinder, a mounting frame fixedly mounted on the driving cylinder, a roller rotatably mounted on the mounting frame and a transmission assembly for driving the driving cylinder to rotate, the driving cylinder being arranged in the circular through hole, and driving the roller to move in a circular trajectory when the driving cylinder rotates, so that the roller hits the plurality of protrusions one by one, and a reset assembly for resetting the vibration block being provided in the screening box;

[0008] The transmission assembly includes a rotating shaft, a face gear fixedly mounted on the top of the rotating shaft, a vertical plate and a connecting shaft rotatably mounted on the vertical plate, the connecting shaft passes through the vertical plate, a spur gear is fixedly mounted on one end of the connecting shaft, and a first bevel gear is fixedly mounted on the other end of the connecting shaft, the spur gear is meshed with the face gear, and a driving assembly for driving the first bevel gear to rotate is provided in the screening box;

[0009] The connecting assembly includes an insert rod, a sleeve and a first support rod. One end of the insert rod is connected to the sieve plate, and the other end of the insert rod is plugged into the sleeve. The end of the sleeve away from the sieve plate is fixedly connected to the connecting seat through the first support rod.

[0010] The present invention is further configured as follows: the reset assembly includes a support frame, an elastic connecting element installed on the support frame, and a reset plate installed at the telescopic end of the elastic connecting element; a third support rod is fixedly installed on the outer wall of the support frame; one end of the third support rod away from the support frame is fixedly connected to the inner wall of the screening box; a plurality of second balls are embedded in the reset plate, the second balls are in contact with the outer wall of the vibrating block, and the vertical plate is fixedly installed on the top end of the support frame.

[0011] The present invention is further configured as follows: the support assembly includes a support sleeve, the connecting seat is arranged inside the support sleeve, the top wall and the bottom wall of the connecting seat are both provided with grooves, the top inner wall and the bottom inner wall of the support sleeve are both embedded with multiple first balls, the first balls are arranged in the grooves, and the first balls are in contact with the inner walls of the grooves.

[0012] The present invention is further configured as follows: both ends of the support sleeve are fixedly connected to a second support rod, an end of the second support rod away from the support sleeve is fixedly installed with a support block, and the detection end of the pressure sensor is fixedly connected to the support block.

[0013] The present invention is further configured as follows: the drive assembly includes a motor, a drive shaft and a second bevel gear, the motor is fixedly mounted on the top of the screening box, the drive shaft is rotatably mounted inside the screening box, the output end of the motor is fixedly connected to the top of the drive shaft, a plurality of second bevel gears are provided and fixedly mounted on the drive shaft, and the plurality of second bevel gears are respectively meshed with the plurality of first bevel gears.

[0014] The present invention is further configured as follows: the bottom wall of the support frame is fixedly connected to an L-shaped plate, the bottom wall of the L-shaped plate is fixedly installed with a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly installed with a connecting ring, and the bottom end of the rotating shaft is rotatably connected to the connecting ring.

[0015] The present invention is further configured as follows: the elastic connecting element includes a connecting tube and a connecting column, the connecting tube is fixedly mounted on the support frame, one end of the connecting column is fixedly connected to the reset plate, the other end of the connecting column extends into the connecting tube, the connecting column and the connecting tube are slidably fitted, a spring is provided in the connecting tube, one end of the spring is fixedly connected to the connecting column, and the other end of the spring is fixedly connected to the inner side wall of the connecting tube.

[0016] The present invention is further configured as follows: the connecting assembly also includes a connecting block, two of the connecting blocks, the plug rod and the sleeve are each provided, the two connecting blocks are symmetrically fixedly installed on both sides of the sieve plate, one end of the two plug rods is fixedly connected to the connecting block, the two plug rods are arranged parallel to each other, the first support rod is fixedly connected to the connecting seat, the two ends of the first support rod are respectively fixedly connected to the two sleeves, the two sleeves are arranged parallel to each other, and the two plug rods are respectively plugged into the two sleeves.

[0017] The present invention is further configured as follows: a feed hopper is fixedly provided on the top of the screening box, and the feed hopper is communicated with the inner cavity of the screening box.

[0018] In summary, the present invention has the following beneficial effects:

[0019] 1. The present invention cooperates with the roller in the driving mechanism and the protrusions on the vibration block. When the roller rotates, it hits the protrusions one by one to push the vibration block to move horizontally, and cooperates with the reset component to reset the vibration block, so that the sieve plate can vibrate horizontally in multiple directions. Compared with the traditional method of driving the sieve plate to vibrate by a vibration motor, the vibration amplitude of the sieve plate is larger. At the same time, due to the large vibration amplitude, the rotation speed of the driving drum can be reduced, thereby effectively reducing the noise of the device and effectively improving the screening efficiency of Chinese medicine raw materials.

[0020] 2. The connection component of the present invention adopts a detachable connection method of an insert rod and a sleeve, so that the number of sieve plates can be selected as needed and the material can be easily taken in and put in. The transmission component cooperates with the drive component to drive multiple drive cylinders to rotate with a single motor, saving costs; through the connection design of the hydraulic cylinder and the rotating shaft, combined with the detachable face gear and spur gear, the working state of the sieve plate can be independently controlled, and the pressure sensor is combined to detect the overall weight of the sieve plate and the material. The vibration is stopped in time when the sieve plate completes screening, thereby achieving the effect of reducing energy consumption. At the same time, it realizes automatic judgment of the screening process of each sieve plate, without manual observation of the material dropping situation of each sieve plate, and can automatically end the screening after the screening is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention after removing the screening box;

[0023] Figure 3 It is a structural schematic diagram of the sieve plate, drive mechanism and vibration assembly of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the sieve plate and the insertion rod of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the vibration assembly, sleeve and connecting seat of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the support assembly of the present invention;

[0027] Figure 7 It is a schematic structural diagram of the driving mechanism, the vibration assembly and the reset assembly of the present invention;

[0028] Figure 8 It is a schematic structural diagram of the vibration block and the protrusion of the present invention;

[0029] Figure 9 It is a structural schematic diagram of the driving mechanism of the present invention;

[0030] Figure 10 It is a structural schematic diagram of the reset component of the present invention.

[0031] Figure: 1, screening box; 2, sieve plate; 201, screen; 3, vibration assembly; 301, vibration block; 302, protrusion; 303, connecting frame; 4, connecting assembly; 401, connecting block; 402, plug rod; 403, sleeve; 404, first support rod; 5, support assembly; 501, support sleeve; 502, first ball; 503, second support rod; 504, support block; 505, pressure sensor; 6, connecting seat; 601, groove; 7, driving mechanism; 701, rotating shaft; 702, driving cylinder; 703, installation Frame; 704, roller; 705, face gear; 706, vertical plate; 707, connecting shaft; 708, spur gear; 709, first bevel gear; 710, second bevel gear; 711, drive shaft; 712, motor; 713, hydraulic cylinder; 714, connecting ring; 715, L-shaped plate; 8, reset assembly; 801, support frame; 802, connecting cylinder; 803, connecting column; 804, reset plate; 805, second ball bearing; 9, third support rod; 10, slag receiving tray; 11, slag discharge hopper; 12, feed hopper; 13, conveying pipe. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings in the embodiments of the present invention.

[0033] See also Figures 1 to 10In an embodiment of the present invention, a multi-stage screening device for Chinese medicine raw materials includes a screening box 1, a plurality of sieve plates 2 arranged in the screening box 1, and a plurality of vibration components 3 for driving the sieve plates 2 to vibrate, the plurality of sieve plates 2 are arranged equidistantly from top to bottom, a sieve mesh 201 is arranged in the sieve plate 2, the mesh size of the plurality of sieve meshes 201 gradually increases from top to bottom, so that the aperture of the sieve hole gradually decreases, a plurality of connecting seats 6 and a plurality of supporting components 5 for supporting the connecting seats 6 are provided in the screening box 1, the sieve plates 2 are connected to the connecting seats 6 through the connecting components 4, the vibration component 3 includes a vibration block 301 and a connecting frame 303, and the vibration block 301 is fixedly connected to the connecting seat 6 through the connecting frame 303. A circular through hole is provided in the vibration block 301, and a plurality of protrusions 302 are provided in the circular through hole. A driving mechanism 7 is provided in the screening box 1, and the driving mechanism 7 includes a driving cylinder 702, a mounting frame 703 fixedly mounted on the driving cylinder 702, a roller 704 rotatably mounted on the mounting frame 703, and a transmission assembly for driving the driving cylinder 702 to rotate. The driving cylinder 702 is arranged in the circular through hole, and the driving cylinder 702 is coaxially arranged with the circular through hole. When the driving cylinder 702 rotates, it drives the roller 704 to move in a circular trajectory, so that the roller 704 hits the plurality of protrusions 302 one by one. A reset assembly 8 for resetting the vibration block 301 is provided in the screening box 1. When in use, Chinese medicine raw materials are put into the uppermost sieve plate 2. During screening, the driving cylinder 702 is driven to rotate by the transmission assembly. When the driving cylinder 702 rotates, the roller 704 is driven to rotate through the mounting frame 703. When the roller 704 rotates, it hits a plurality of bumps 302 one by one. When the roller 704 hits the bumps 302, the vibration block 301 is pushed to move horizontally through the bumps 302. When the roller 704 separates from the bumps 302, the reset assembly 8 drives the vibration block 301 to reset, hitting the bumps 302 at different positions. The vibration block 301 moves in different directions. When the vibration block 301 moves, it drives the connecting seat 6 to move through the connecting frame 303, thereby driving the sieve plate 2 to move through the connecting assembly 4, thereby making the sieve plate 2 move horizontally. The disc 2 can move horizontally in multiple directions to screen the Chinese medicine raw materials in the sieve disc 2. The mesh size of the multiple sieves 201 gradually increases from top to bottom, so that the particle sizes screened by different sieve discs 2 are different, thereby realizing multi-stage screening of Chinese medicine raw materials. This solution drives the vibration block 301 to vibrate by the roller 704 hitting the protrusion 302 to cause the protrusion 302 to be displaced. Combined with the setting of the reset component 8, it can drive the sieve disc 2 to vibrate, and the vibration amplitude is large. The unidirectional displacement can be set to 5-30mm according to needs. Due to the large displacement, the rotation speed of the driving cylinder 702 can be set lower, thereby reducing the noise of the device, and the vibration with large displacement can effectively improve the screening efficiency.

[0034] In this embodiment, preferably, the reset assembly 8 includes a support frame 801, an elastic connecting element installed on the support frame 801 and a reset plate 804 installed at the telescopic end of the elastic connecting element, the outer wall of the support frame 801 is fixedly installed with a third support rod 9, and one end of the third support rod 9 away from the support frame 801 is fixedly connected to the inner wall of the screening box 1, and a plurality of second balls 805 are embedded and installed on the reset plate 804, and the second balls 805 are in contact with the outer wall of the vibration block 301, and the elastic connecting element and the reset plate 804 are each provided with four, and the second balls 805 on the four reset plates 804 are in contact with the four side walls of the vibration block 301 respectively; the elastic connecting element includes a connecting tube 802 and a connecting column 803, and the connecting tube 802 is fixedly installed on the support frame 801, and the One end of the connecting column 803 is fixedly connected to the reset plate 804, and the other end of the connecting column 803 extends into the connecting cylinder 802, and the connecting column 803 and the connecting cylinder 802 are slidably matched. A spring (not shown in the figure) is provided in the connecting cylinder 802, and one end of the spring is fixedly connected to the connecting column 803, and the other end of the spring is fixedly connected to the inner side wall of the connecting cylinder 802; through the arrangement of four elastic connecting elements, the second balls 805 on the four reset plates 804 are respectively in contact with the four side walls of the vibration block 301, and under the elastic action of the spring, the vibration block 301 is positioned at the center of the support frame 801, so that after the roller 704 pushes the vibration block 301 to move through the protrusion 302, as the roller 704 separates from the protrusion 302, the vibration block 301 can be reset to the center position of the support frame 801.

[0035] In this embodiment, preferably, the support assembly 5 includes a support sleeve 501, the connecting seat 6 is arranged inside the support sleeve 501, the top wall and the bottom wall of the connecting seat 6 are both provided with a groove 601, the top inner wall and the bottom inner wall of the support sleeve 501 are both embedded with a plurality of first balls 502, the first balls 502 are arranged in the groove 601, and the first balls 502 are in contact with the inner wall of the groove 601; both ends of the support sleeve 501 are fixedly connected to the second support rod 503, and the second support rod 503 is fixedly connected to the second support rod 503. 03 A support block 504 is fixedly installed at one end away from the support sleeve 501, and a pressure sensor 505 is arranged below the support block 504. The bottom of the pressure sensor 505 is fixedly connected to the inner wall of the screening box 1, and the detection end of the pressure sensor 505 is fixedly connected to the support block 504; the support sleeve 501 can support the connecting seat 6, and the setting of the groove 601 can limit the connecting seat 6, so that while supporting the connecting seat 6, the connecting seat 6 can move slightly in the support sleeve 501.

[0036] In this embodiment, preferably, the connecting assembly 4 includes a connecting block 401, a plug rod 402, a sleeve 403 and a first support rod 404. The connecting block 401, the plug rod 402 and the sleeve 403 are each provided with two, and the two connecting blocks 401 are symmetrically fixedly installed on both sides of the sieve plate 2. One end of the two plug rods 402 is fixedly connected to the connecting block 401, and the two plug rods 402 are arranged parallel to each other. The first support rod 404 is fixedly connected to the connecting seat 6, and both ends of the first support rod 404 are fixedly installed with sleeves 403. The two sleeves 403 are arranged parallel to each other, and the two insertion rods 402 are respectively plugged into the two sleeves 403. A magnetic block can be set in the sleeve 403 to make the insertion rod 402 and the sleeve 403 magnetically attracted to prevent the sieve plate 2 from loosening, and a locking mechanism can also be provided to make the insertion rod 402 and the sleeve 403 snap connected; the sieve plate 2 is detachably connected to the sleeve 403 through the insertion rod 402, so that the sieve plate 2 can be taken out from the screening box 1, so that the Chinese medicine raw materials in the sieve plate 2 can be poured out after screening, and the number of sieve plates 2 to be used can be rotated according to demand.

[0037] In this embodiment, preferably, a feed hopper 12 is fixedly provided on the top of the screening box 1, and the feed hopper 12 is communicated with the inner cavity of the screening box 1, and a delivery pipe 13 is provided above the feed hopper 12; the Chinese medicine raw materials can be fed into the feed hopper 12 through the delivery pipe 13, or the Chinese medicine raw materials can be manually poured directly into the feed hopper 12.

[0038] In this embodiment, preferably, a slag receiving tray 10 is fixedly installed at the bottom of the inner cavity of the screening box 1, and a slag hopper 11 is fixedly connected to one side of the slag receiving tray 10. The lowest sieve tray 2 can screen out impurities in the Chinese medicine raw materials, and the impurities fall into the slag receiving tray 10. The slag receiving tray 10 is tilted so that the Chinese medicine raw materials in the slag receiving tray 10 can slide into the slag hopper 11, thereby collecting impurities and relatively broken raw material fragments.

[0039] See also Figures 7 to 9In the embodiment of the present invention, the transmission assembly includes a rotating shaft 701, a face gear 705 fixedly mounted on the top of the rotating shaft 701, a vertical plate 706 fixedly mounted on the top of the support frame 801, and a connecting shaft 707 rotatably mounted on the vertical plate 706. The transmission assembly is provided with multiple groups to drive multiple driving shafts 711 to rotate. The connecting shaft 707 passes through the vertical plate 706. One end of the connecting shaft 707 is fixedly mounted with a spur gear 708, and the other end of the connecting shaft 707 is fixedly mounted with a first bevel gear 709. The spur gear 708 meshes with the face gear 705. A driving assembly for driving the first bevel gear 709 to rotate is provided in the screening box 1; the driving assembly includes a motor 712, a driving shaft 711 and a second bevel gear 710. The motor 712 is fixedly mounted on the top of the screening box 1, and the driving shaft 711 is rotatably mounted on the screening box 1, the output end of the motor 712 is fixedly connected to the top of the driving shaft 711, and the second bevel gear 710 is provided with a plurality of and fixedly sleeved on the driving shaft 711, and the plurality of second bevel gears 710 are respectively engaged with the plurality of first bevel gears 709; the motor 712 can drive the driving shaft 711 to rotate, and when the driving shaft 711 rotates, it drives the plurality of second bevel gears 710 to rotate, and when the second bevel gear 710 rotates, it drives the first bevel gear 709 to rotate, thereby driving the connecting shaft 707 to rotate, and when the connecting shaft 707 rotates, it drives the spur gear 708 to rotate, and when the spur gear 708 rotates, it drives the rotating shaft 701 to rotate through the face gear 705, thereby driving the driving cylinder 702 to rotate, and then realizing driving the driving cylinder 702 to rotate through the transmission assembly. By only providing one motor 712, it is possible to realize driving the rotation of multiple driving cylinders 702.

[0040] The bottom wall of the support frame 801 is preferably fixedly connected to an L-shaped plate 715, and the bottom wall of the L-shaped plate 715 is fixedly installed with a hydraulic cylinder 713, and the output end of the hydraulic cylinder 713 is fixedly installed with a connecting ring 714, and the bottom end of the rotating shaft 701 is rotatably connected to the connecting ring 714, specifically, it is rotatably connected through a bearing; the connecting ring 714 can support the rotating shaft 701, and the output end of the hydraulic cylinder 713 can drive the rotating shaft 701 to rise and fall. When the rotating shaft 701 descends, the face gear 705 moves downward with the rotating shaft 701, so that the face gear 705 is separated from the spur gear 708, and then the spur gear 708 rotates without driving the face gear 705 to rotate, so that whether the multiple sieve plates 2 are working can be independently controlled. Based on this design, during the screening process, some of the sieve plates 2 can be independently controlled not to vibrate. When screening, the uppermost hydraulic cylinder 713 is first driven to extend and retract at a fixed time. The top sieve plate 2 stops vibrating at a fixed time. When the sieve plate 2 stops vibrating, the pressure sensor 505 corresponding to the sieve plate 2 is used to detect the overall weight of the sieve plate 2, the Chinese medicinal materials on the sieve plate 2, the connecting component 4, the supporting component 5 and the vibrating component 3. If the difference between the two detection results is small, it proves that the Chinese medicinal materials on the sieve plate 2 have not continued to fall down, and it proves that the sieve plate 2 has completed screening. At this time, the vibration of the sieve plate 2 can be stopped, thereby reducing energy consumption. Subsequently, the second sieve plate 2 from the top to the bottom is detected in the same way to see whether the screening is completed. When the screening is completed, the vibration is stopped. This process is repeated until all sieve plates 2 stop vibrating. At this time, the screening of the Chinese medicinal materials is completed, and the sieve plate 2 can be taken out for unloading. Then, it is possible to independently judge whether each sieve plate 2 has completed screening in a timely manner, and to stop the vibration of the sieve plate 2 that has completed screening in time. When the sieve plate 2 completes screening, the load of the motor 712 can be reduced, thereby reducing energy consumption.

[0041] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A multi-stage screening device for Chinese medicine raw materials, comprising a screening box (1), a plurality of sieve plates (2) arranged in the screening box (1), and a plurality of vibration components (3) for driving the sieve plates (2) to vibrate, characterized in that: The screening box (1) is provided with a plurality of connecting seats (6) and a plurality of supporting assemblies (5) for supporting the connecting seats (6). A pressure sensor (505) for weighing the supporting assembly and the structure on the supporting assembly is fixedly installed on the inner wall of the screening box (1). The sieve plate (2) is connected to the connecting seat (6) via the connecting assembly (4). The vibration assembly (3) includes a vibration block (301) and a connecting frame (303). The vibration block (301) is fixedly connected to the connecting seat (6) via the connecting frame (303). A circular through hole is opened in the vibration block (301), and a plurality of protrusions (301) are provided in the circular through hole. 02), a driving mechanism (7) is provided in the screening box (1), the driving mechanism (7) comprising a driving cylinder (702), a mounting frame (703) fixedly mounted on the driving cylinder (702), a roller (704) rotatably mounted on the mounting frame (703), and a transmission assembly for driving the driving cylinder (702) to rotate, the driving cylinder (702) being arranged in a circular through hole, and when the driving cylinder (702) rotates, the roller (704) is driven to move in a circular trajectory, so that the roller (704) hits a plurality of protrusions (302) one by one, and a reset assembly (8) for resetting the vibration block (301) is provided in the screening box (1); The transmission assembly comprises a rotating shaft (701), a face gear (705) fixedly mounted on the top of the rotating shaft (701), a vertical plate (706), and a connecting shaft (707) rotatably mounted on the vertical plate (706), wherein the connecting shaft (707) passes through the vertical plate (706), a spur gear (708) is fixedly mounted on one end of the connecting shaft (707), and a first bevel gear (709) is fixedly mounted on the other end of the connecting shaft (707), wherein the spur gear (708) meshes with the face gear (705), and a driving assembly for driving the first bevel gear (709) to rotate is provided in the screening box (1); The connecting assembly comprises an insert rod (402), a sleeve (403) and a first support rod (404); one end of the insert rod (402) is connected to the sieve plate (2); the other end of the insert rod (402) is plugged into the sleeve (403); and the end of the sleeve (403) away from the sieve plate (2) is fixedly connected to the connecting seat (6) via the first support rod (404); The reset assembly (8) comprises a support frame (801), an elastic connecting element mounted on the support frame (801), and a reset plate (804) mounted on the telescopic end of the elastic connecting element, a third support rod (9) being fixedly mounted on the outer wall of the support frame (801), an end of the third support rod (9) away from the support frame (801) being fixedly connected to the inner wall of the screening box (1), a plurality of second balls (805) being embedded and mounted on the reset plate (804), the second balls (805) being in contact with the outer wall of the vibration block (301), and the vertical plate (706) being fixedly mounted on the top of the support frame (801).

2. The multi-stage screening device for Chinese medicinal raw materials according to claim 1, characterized in that: The support assembly (5) comprises a support sleeve (501), the connecting seat (6) is arranged inside the support sleeve (501), the top wall and the bottom wall of the connecting seat (6) are both provided with a groove (601), and the top inner wall and the bottom inner wall of the support sleeve (501) are both embedded with a plurality of first balls (502), the first balls (502) are arranged in the groove (601), and the first balls (502) are in contact with the inner wall of the groove (601).

3. The multi-stage screening device for Chinese medicinal raw materials according to claim 2, characterized in that: Both ends of the support sleeve (501) are fixedly connected to a second support rod (503), one end of the second support rod (503) away from the support sleeve (501) is fixedly mounted with a support block (504), and the detection end of the pressure sensor (505) is fixedly connected to the support block (504).

4. The multi-stage screening device for Chinese medicinal raw materials according to claim 3, characterized in that: The driving assembly includes a motor (712), a driving shaft (711) and a second bevel gear (710), wherein the motor (712) is fixedly mounted on the top end of the screening box (1), and the driving shaft (711) is rotatably mounted inside the screening box (1), and the output end of the motor (712) is fixedly connected to the top end of the driving shaft (711), and a plurality of second bevel gears (710) are provided and fixedly sleeved on the driving shaft (711), and the plurality of second bevel gears (710) are respectively meshed with the plurality of first bevel gears (709).

5. The multi-stage screening device for Chinese medicinal raw materials according to claim 4, characterized in that: The bottom wall of the support frame (801) is fixedly connected to an L-shaped plate (715), the bottom wall of the L-shaped plate (715) is fixedly mounted with a hydraulic cylinder (713), the output end of the hydraulic cylinder (713) is fixedly mounted with a connecting ring (714), and the bottom end of the rotating shaft (701) is rotatably connected to the connecting ring (714).

6. The multi-stage screening device for Chinese medicinal raw materials according to claim 1, characterized in that: The elastic connecting element comprises a connecting tube (802) and a connecting column (803), wherein the connecting tube (802) is fixedly mounted on the support frame (801), one end of the connecting column (803) is fixedly connected to the reset plate (804), and the other end of the connecting column (803) extends into the connecting tube (802), wherein the connecting column (803) and the connecting tube (802) are slidably matched, and a spring is provided in the connecting tube (802), one end of the spring is fixedly connected to the connecting column (803), and the other end of the spring is fixedly connected to the inner wall of the connecting tube (802).

7. The multi-stage screening device for Chinese medicinal raw materials according to claim 1, characterized in that: The connecting assembly (4) further comprises a connecting block (401), two connecting blocks (401), two insertion rods (402) and two sleeves (403), the two connecting blocks (401) being symmetrically fixedly mounted on both sides of the sieve plate (2), one end of the two insertion rods (402) being fixedly connected to the connecting block (401), the two insertion rods (402) being arranged parallel to each other, the first support rod (404) being fixedly connected to the connecting seat (6), the two ends of the first support rod (404) being fixedly connected to the two sleeves (403), the two sleeves (403) being arranged parallel to each other, and the two insertion rods (402) being plugged into the two sleeves (403), respectively.

8. The multi-stage screening device for Chinese medicinal raw materials according to claim 1, characterized in that: A feed hopper (12) is fixedly provided on the top of the screening box (1), and the feed hopper (12) is communicated with the inner cavity of the screening box (1).

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