Winnowing machine for removing iron scrap magnetic impurities in traditional Chinese medicine decoction pieces

Abstract

The utility model relates to the technical field of traditional Chinese medicine decoction piece production, in particular to a winnowing machine for removing scrap iron magnetic impurities in traditional Chinese medicine decoction pieces, which comprises a working plate and a plurality of supporting columns fixed at the bottom end of the working plate, a winnowing box is embedded on the top surface of the working plate, and an impurity discharging pipe communicated with an inner cavity of the winnowing box is fixed on the left side surface of the winnowing box. An air blower located on the right side of the winnowing box is installed on the top face of the working plate, and an air outlet pipe of the air blower is tightly sleeved with an air inlet pipe communicated with an inner cavity of the winnowing box. By arranging the working plate, the winnowing box, the impurity discharging pipe, the air blower, the air inlet pipe and the magnetic suction filter screen, traditional Chinese medicine decoction pieces can be winnowed, scrap iron in the traditional Chinese medicine decoction pieces can be removed, and the scrap iron is prevented from influencing the quality of the traditional Chinese medicine decoction pieces and the health of a user; and by arranging the cleaning mechanism, scrap iron attached to the surface of the magnetic suction filter screen can be brushed away, and the magnetic suction filter screen does not need to be manually cleaned, so that the scrap iron in the traditional Chinese medicine decoction pieces can be adsorbed by the magnetic suction filter screen.

Description

Technical Field

[0001] The utility model relates to the technical field of production of Chinese medicinal slices, in particular to an air separator for removing iron filings and magnetic impurities in Chinese medicinal slices. Background Art

[0002] Chinese herbal medicines are processed and prepared and can be directly used in clinical Chinese medicine. At present, they need to be air-selected during processing to remove impurities in the pieces. An air selector is needed in the air-selection process.

[0003] The patent with announcement number CN220611309U discloses a medicinal material air sorting machine, including: a box body, a screen, a sliding component and a cleaning component; the top of the box body is provided with an air inlet and a feed port, the bottom of the box body is provided with an air outlet, and one side of the box body is provided with a discharge port; a screen is provided inside the box body, and the sliding component is provided inside the box body, and the sliding component includes a motor, a screw and a slider, the screw is rotatably connected to the box body, and its rotating shaft is along the horizontal direction, the slider is arranged on the screw, and the motor is arranged on the box body; the cleaning component includes a telescopic rod, a long brush, an electromagnet and an iron block, the telescopic rod is arranged below the slider, the telescopic rod is arranged in the vertical direction, the upper end is connected to the slider, and the lower end is connected to the long brush.

[0004] Although the device is provided with a cleaning component to clean the residual medicinal material fragments in the sieve holes after the medicinal materials are sieved through the sieve, thereby keeping the sieve holes unobstructed and improving the screening effect of the medicine, the device is not provided with a structure to remove iron filings impurities in the Chinese herbal medicines, and thus cannot remove the iron filings impurities in the Chinese herbal medicines. The iron filings mixed in the Chinese herbal medicines will affect the quality of the Chinese herbal medicines and the health of the users. Utility Model Content

[0005] The purpose of the utility model is to provide a winnowing machine for removing iron filings and magnetic impurities in Chinese herbal medicines, so as to solve the problem that the device proposed in the above-mentioned background technology is not provided with a structure for removing iron filings impurities in Chinese herbal medicines, and thus the iron filings impurities in Chinese herbal medicines cannot be removed, and the iron filings mixed in the Chinese herbal medicines will affect the quality of the Chinese herbal medicines and the health of users.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A wind separator for removing iron filings and magnetic impurities in Chinese herbal medicine slices, comprising a working plate, a plurality of support columns fixed to the bottom end of the working plate, a wind separation box embedded on the top surface of the working plate, a waste pipe connected to the inner cavity of the wind separation box fixed to the left surface of the wind separation box, a blower located on the right side of the wind separation box installed on the top surface of the working plate, an air outlet pipe of the blower tightly sleeved with an air inlet pipe connected to the inner cavity of the wind separation box, a magnetic filter corresponding to the position of the waste pipe and matched in size is fixed on the left inner wall of the wind separation box, and further comprising:

[0008] The cleaning mechanism is arranged on the top surface of the working plate and is used for cleaning the iron filings on the outer wall of the magnetic suction filter. The cleaning mechanism includes an L-shaped vertical plate fixed on the top surface of the working plate near the rear end, a rotating column rotatably connected to the horizontal plate end of the vertical plate, a rotating roller coaxially fixed on the bottom surface of the rotating column and rotatably connected to the working plate, a cylindrical cam coaxially fixed on the circumferential outer wall of the rotating column, a rotating rod coaxially fixed on the top surface of the rotating column, two gears located above the vertical plate and used for driving the rotating rod to rotate, a motor installed on the top surface of the horizontal plate end of the vertical plate and used for driving the two gears to rotate, and a motor slidably connected to the vertical plate. A moving block on the front surface of the vertical plate end of the upright plate, a moving rod fixed on the left surface of the moving block and in an L-shape, a connecting rod fixed on the bottom surface of the vertical rod end of the moving rod and slidably plugged with the air separation box, the connecting rod passes through the top surface of the air separation box and extends to the inside of the air separation box near the top, a number of brush rods for cleaning the magnetic filter are fixed on the front surface of the connecting rod near the bottom end, a spiral groove is provided on the circumferential outer wall of the cylindrical cam, a sliding column slidably connected to the sliding groove on the outer wall of the cylindrical cam is fixed on the front surface of the moving block, and the two gears are meshed with each other.

[0009] As a preferred embodiment, the cleaning mechanism further comprises a rotating shaft coaxially connected to the output shaft of the motor, and the two gears are coaxially fixed on the circumferential outer walls of the rotating shaft and the rotating rod respectively.

[0010] As a preferred embodiment, a guide groove is provided on the front surface of the vertical plate end of the vertical board, and a guide block slidably connected to the guide groove on the front surface of the vertical plate end of the vertical board is fixed on the rear surface of the moving block.

[0011] As a preferred embodiment, a feed funnel connected to its inner cavity is fixed on the top surface of the air separation box, a feed valve is installed on the outer wall of the feed funnel tube body, a discharge pipe connected to its inner cavity is fixed at the bottom end of the air separation box, and solenoid valves are installed on the outer walls of the discharge pipe and the impurity discharge pipe.

[0012] As a preferred embodiment, a support plate is fixed to the bottom end of the support column, an anti-skid plate matching its shape is fixed to the bottom end of the support plate, and the thickness of the anti-skid plate is 2-7 cm.

[0013] As a preferred embodiment, the bottom end of the air separation box is concave toward the middle on all sides, and the degree of concavity is 12-26°.

[0014] As a preferred embodiment, the cleaning mechanism further comprises a protection box fixed on the top surface of the vertical plate and the horizontal plate end, the motor is located inside the protection box, and the rotating shaft passes through the top surface of the protection box.

[0015] As a preferred embodiment, the transverse cross-sectional shape of the guide groove on the front side surface of the vertical plate end of the vertical board is convex, and the shape of the guide block is convex to match the shape of the guide groove on the front side surface of the vertical plate end of the vertical board.

[0016] As a preferred embodiment, the contact parts of the air separation box with the feed funnel, the discharge pipe, the impurity discharge pipe and the connecting rod are all provided with sealing rings, and the contact parts of the air inlet pipe with the air separation box and the blower are also provided with sealing rings.

[0017] As a preferred implementation manner, the positions of the brush rod and the magnetic filter screen correspond to each other, and the right side surface of the magnetic filter screen and the left side surface of the brush rod are located on the same plane.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model can perform air selection on Chinese herbal medicine slices by arranging a working plate, an air selection box, a discharge pipe, a blower, an air inlet pipe and a magnetic suction filter, and can remove iron filings in the Chinese herbal medicine slices to prevent the iron filings from affecting the quality of the Chinese herbal medicine slices and the health of users. By arranging a cleaning mechanism, the iron filings attached to the surface of the magnetic suction filter can be brushed off, and there is no need to manually clean the magnetic suction filter, so that the magnetic suction filter can smoothly adsorb the iron filings in the Chinese herbal medicine slices;

[0020] 2. In the utility model, a guide groove is provided on the front surface of the vertical plate end of the upright plate, and a guide block is fixed on the rear surface of the moving block, which is slidably connected to the guide groove on the front surface of the vertical plate end of the upright plate, so as to guide the movement of the moving block and further guide the movement of several brush rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the overall structural diagrams of the utility model;

[0022] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0023] Figure 3 It is a schematic diagram of a local structure in the utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the stroke selection box of the utility model;

[0025] Figure 5 It is a schematic diagram of the overall structure of the cleaning mechanism in the utility model;

[0026] Figure 6 This is one of the partial exploded views of the cleaning mechanism in the utility model;

[0027] Figure 7 This is the second partial exploded view of the cleaning mechanism in the utility model.

[0028] The meaning of each number in the figure is:

[0029] 1. Working plate; 2. Air separation box; 3. Feed hopper; 4. Discharge pipe; 5. Exhaust pipe; 6. Blower; 7. Cleaning mechanism; 71. Vertical plate; 72. Rotating column; 73. Rotating roller; 74. Cylindrical cam; 75. Moving block; 76. Moving rod; 77. Connecting rod; 78. Brush rod; 79. Sliding column; 710. Guide block; 711. Rotating rod; 712. Gear; 713. Motor; 714. Rotating shaft; 715. Protective box; 8. Magnetic filter; 9. Inlet pipe; 10. Feed valve; 11. Solenoid valve; 12. Support column; 13. Support plate; 14. Anti-skid plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-Figure 7 The utility model provides a technical solution: a wind separator for removing iron filings and magnetic impurities in Chinese herbal medicine slices, comprising a working plate 1, a plurality of support columns 12 fixed at the bottom end of the working plate 1, a wind separation box 2 is embedded on the top surface of the working plate 1, a discharge pipe 5 connected to the inner cavity of the wind separation box 2 is fixed on the left surface of the wind separation box 2, a blower 6 located on the right side of the wind separation box 2 is installed on the top surface of the working plate 1, an air outlet pipe of the blower 6 is tightly sleeved with an air inlet pipe 9 connected to the inner cavity of the wind separation box 2, a magnetic filter 8 corresponding to the position of the discharge pipe 5 and matched in size is fixed on the left inner wall of the wind separation box 2, and also includes:

[0032] The cleaning mechanism 7 is arranged on the top surface of the working plate 1 and is used to clean the iron filings on the outer wall of the magnetic filter 8. The cleaning mechanism 7 includes an L-shaped vertical plate 71 fixed on the top surface of the working plate 1 near the rear end, a rotating column 72 rotatably connected to the horizontal plate end of the vertical plate 71, a rotating roller 73 coaxially fixed on the bottom surface of the rotating column 72 and rotatably connected to the working plate 1, a cylindrical cam 74 coaxially fixed on the circumferential outer wall of the rotating column 72, a rotating rod 711 coaxially fixed on the top surface of the rotating column 72, two gears 712 located above the vertical plate 71 and used to drive the rotating rod 711 to rotate, a motor 713 installed on the top surface of the horizontal plate end of the vertical plate 71 and used to drive the two gears 712 to rotate, a moving block 75 slidably connected to the front side surface of the vertical plate end of the vertical plate 71, a moving rod 76 fixed on the left side surface of the moving block 75 and in an L-shaped shape, and a moving rod 76 fixed on the bottom surface of the vertical rod end of the moving rod 76 and slidably plugged with the air separation box 2. The connecting rod 77 passes through the top surface of the air separation box 2 and extends to the inside of the air separation box 2 near the top. A plurality of brush rods 78 for cleaning the magnetic filter 8 are fixed on the front side surface of the connecting rod 77 near the bottom end. A spiral slide groove is provided on the circumferential outer wall of the cylindrical cam 74. A slide column 79 is fixed on the front side surface of the moving block 75 to be slidably connected to the slide groove on the outer wall of the cylindrical cam 74, and the two gears 712 are meshed with each other. By arranging the working plate 1, the air separation box 2, the impurity discharge pipe 5, the blower 6, the air inlet pipe 9 and the magnetic filter 8, the Chinese herbal medicine slices can be air-selected, and the iron filings in the Chinese herbal medicine slices can be removed to prevent the iron filings from affecting the quality of the Chinese herbal medicine slices and the health of the users. By arranging the cleaning mechanism 7, the iron filings attached to the surface of the magnetic filter 8 can be brushed off, and there is no need to manually clean the magnetic filter 8, so that the magnetic filter 8 can smoothly adsorb the iron filings in the Chinese herbal medicine slices.

[0033] In this embodiment, the cleaning mechanism 7 also includes a rotating shaft 714 coaxially connected to the output shaft of the motor 713, and two gears 712 are coaxially fixed on the circumferential outer walls of the rotating shaft 714 and the rotating rod 711, respectively, which can smoothly drive the two gears 712 to rotate, and then smoothly drive the roller 73 and the rotating column 72 to rotate.

[0034] In addition, a guide groove is provided on the front surface of the vertical plate end of the vertical plate 71, and a guide block 710 is fixed on the rear surface of the moving block 75, which is slidably connected to the guide groove on the front surface of the vertical plate end of the vertical plate 71, so as to guide the movement of the moving block 75 and further guide the movement of several brush rods 78.

[0035] Furthermore, a feed funnel 3 connected to its inner cavity is fixed on the top surface of the air separation box 2, a feed valve 10 is installed on the outer wall of the tube body of the feed funnel 3, a discharge pipe 4 connected to its inner cavity is fixed at the bottom end of the air separation box 2, and solenoid valves 11 are installed on the outer walls of the discharge pipe 4 and the impurity discharge pipe 5, so that Chinese herbal medicines that need to be air-selected can be smoothly added to the interior of the air separation box 2, and the air-selected Chinese herbal medicines can also be discharged.

[0036] Specifically, a support plate 13 is fixed to the bottom end of the support column 12, and an anti-skid plate 14 matching its shape is fixed to the bottom end of the support plate 13, and the thickness of the anti-skid plate 14 is 2-7 cm, preferably 5 cm in this article, so as to increase the contact area and friction between the entire device and the ground, thereby making the entire device more stable during operation.

[0037] More specifically, the bottom end of the air separation box 2 is concave in all directions toward the middle, and the degree of concavity is 12-26°, preferably 17° in this article, so that the Chinese herbal medicine slices inside the air separation box 2 can be unloaded smoothly, and the adsorbed iron filings can also be unloaded smoothly.

[0038] It is worth noting that the cleaning mechanism 7 also includes a protection box 715 fixed on the top surface of the horizontal plate end of the vertical plate 71, the motor 713 is located inside the protection box 715, and the rotating shaft 714 passes through the top surface of the protection box 715, which can protect the motor 713 and thus extend the service life of the motor 713.

[0039] It is worth mentioning that the transverse cross-sectional shape of the guide groove on the front side surface of the vertical plate end of the vertical plate 71 is convex, and the shape of the guide block 710 is convex to match the shape of the guide groove on the front side surface of the vertical plate end of the vertical plate 71, which can make the connection between the guide block 710 and the guide groove on the front side surface of the vertical plate end of the vertical plate 71 tighter, and indirectly make the several brush rods 78 more stable during the movement.

[0040] It is worth emphasizing that the parts where the air separation box 2 contacts the feed funnel 3, the discharge pipe 4, the impurity discharge pipe 5 and the connecting rod 77 are all provided with sealing rings, and the parts where the air intake pipe 9 contacts the air separation box 2 and the blower 6 are also provided with sealing rings, which can make the sealing of the entire device better and prevent air leakage or material leakage.

[0041] It is worth adding that the positions of the brush rod 78 and the magnetic filter 8 correspond, and the right surface of the magnetic filter 8 and the left surface of the brush rod 78 are located on the same plane, so that several brush rods 78 can smoothly clean the iron filings attached to the surface of the magnetic filter 8.

[0042] Finally, it should be noted that the blower 6, motor 713, solenoid valve 11 and other components involved in the utility model are all universal standard parts or components known to technical personnel in this field, and their structures and principles are all known to technical personnel in this field through technical manuals or through conventional experimental methods. In the idle space of this device, all the above-mentioned electrical components, which refer to power elements, electrical components, and compatible controllers and power supplies, are connected through wires. The specific connection means should refer to the working principle of the utility model. The electrical connection between each electrical component is completed in a sequential working order, and the detailed connection means are all well-known technologies in the field.

[0043] In the specific use process of this embodiment, when it is necessary to air-select the Chinese herbal medicine slices, first open the feed valve 10 on the outer wall of the tube body of the feed funnel 3 and start the solenoid valve 11 on the outer wall of the impurity discharge pipe 5 through the external PLC, then tightly connect the collection pipe of the external impurity collection device with the discharge pipe 4, start the blower 6 through the external PLC and slowly add the Chinese herbal medicine slices into the air separation box 2 through the feed funnel 3, after the blower 6 is started, air can be transported to the inside of the air inlet pipe 9, and the air entering the inside of the air inlet pipe 9 then blows the iron filings and other impurities entrained by the Chinese herbal medicine slices falling in the air separation box 2 onto the surface of the magnetic filter 8, the iron filings are adsorbed by the magnetic filter 8, and the remaining impurities pass through the magnetic filter 8 and enter the outside of the external impurity collection device from the impurity discharge pipe 5, when the sorting is completed, place the external Chinese herbal medicine slice collection device on the top surface of the working plate 1 at a position corresponding to the position of the discharge pipe 4, and start the solenoid valve 11 on the outer wall of the discharge pipe 4 through the external PLC, so that the Chinese herbal medicine slices air-selected in the air separation box 2 can be discharged;

[0044] When it is necessary to clean the iron filings attached to the surface of the magnetic filter 8, firstly, the solenoid valve 11 on the outer wall of the discharge pipe 4 is started by the external PLC, and then the external iron filings collecting device is placed on the top surface of the working plate 1 at a position corresponding to the position of the discharge pipe 4, and then the output shaft of the motor 713 is started and controlled by the external PLC to rotate alternately in forward and reverse directions. The rotation of the output shaft of the motor 713 drives the rotating shaft 714 coaxially connected thereto to rotate, and the rotation of the rotating shaft 714 drives the gear 712 on the same side coaxially fixed thereto to rotate, and the rotation of the gear 712 drives another gear 712 meshing therewith to rotate, and the rotation of the other gear 712 drives the rotating rod 711 coaxially fixed thereto to rotate, and the rotation of the rotating rod 711 drives the rotating column 72 coaxially fixed thereto to rotate, and the rotation of the rotating column 72 drives the cylindrical cam 74 coaxially fixed thereto to rotate, and the cylindrical cam 7 4 rotates to drive the slide groove on its outer wall to rotate. During the rotation process, the cylindrical cam 74 drives the slide post 79 slidably connected to the slide groove on its outer wall to move. The slide post 79 moves under the guidance of the moving block 75, the guide block 710 and the guide groove on the front side surface of the vertical plate 71. The movement of the moving block 75 drives the moving rod 76 fixed thereto to move. The movement of the moving rod 76 indirectly drives the brush rod 78 to move. Because the output shaft of the motor 713 rotates forward and reverse alternately, the cylindrical cam 74 can be rotated forward and reverse alternately, and then the plurality of brush rods 78 can be indirectly made to perform linear reciprocating motion in the vertical direction. During the process of the plurality of brush rods 78 performing linear reciprocating motion in the vertical direction, the debris attached to the right side surface of the magnetic suction filter 8 can be removed, and the fallen iron chips then enter the interior of the external iron chip collection device through the discharge pipe 4.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A winnowing machine for removing iron filings and magnetic impurities from Chinese herbal medicine pieces, comprising a working plate (1), and a plurality of supporting columns (12) fixed at the bottom end of the working plate (1), characterized in that: A wind separation box (2) is embedded on the top surface of the working plate (1), a debris discharge pipe (5) connected to the inner cavity of the wind separation box (2) is fixed on the left surface of the wind separation box (2), a blower (6) located on the right side of the wind separation box (2) is installed on the top surface of the working plate (1), an air outlet pipe of the blower (6) is tightly connected with an air inlet pipe (9) connected to the inner cavity of the wind separation box (2), a magnetic suction filter (8) corresponding to the position of the debris discharge pipe (5) and matched with the size is fixed on the left inner wall of the wind separation box (2), and further comprising: A cleaning mechanism (7) is arranged on the top surface of the working plate (1) and is used to clean the iron filings on the outer wall of the magnetic filter (8). The cleaning mechanism (7) comprises a vertical plate (71) fixed on the top surface of the working plate (1) near the rear end and in an L-shaped shape, a rotating column (72) rotatably connected to the horizontal plate end of the vertical plate (71), a rotating roller (73) coaxially fixed to the bottom surface of the rotating column (72) and rotatably connected to the working plate (1), a cylindrical cam (74) coaxially fixed on the circumferential outer wall of the rotating column (72), a rotating rod (711) coaxially fixed on the top surface of the rotating column (72), two gears (712) located above the vertical plate (71) and used to drive the rotating rod (711) to rotate, and a motor (713) installed on the top surface of the horizontal plate end of the vertical plate (71) and used to drive the two gears (712) to rotate. ), a moving block (75) slidably connected to the front side surface of the vertical plate end of the vertical plate (71), a moving rod (76) fixed on the left side surface of the moving block (75) and in an L-shaped shape, and a connecting rod (77) fixed on the bottom surface of the vertical rod end of the moving rod (76) and slidably plugged into the air separation box (2), the connecting rod (77) passes through the top surface of the air separation box (2) and extends to the inside of the air separation box (2) near the top, a plurality of brush rods (78) for cleaning the magnetic filter (8) are fixed on the front side surface of the connecting rod (77) near the bottom end, a spiral sliding groove is provided on the circumferential outer wall of the cylindrical cam (74), a sliding column (79) slidably connected to the sliding groove on the outer wall of the cylindrical cam (74) is fixed on the front side surface of the moving block (75), and the two gears (712) are meshed with each other.

2. The winnowing machine for removing iron filings and magnetic impurities in Chinese herbal medicine slices according to claim 1, characterized in that: The cleaning mechanism (7) further comprises a rotating shaft (714) coaxially connected to the output shaft of the motor (713), and the two gears (712) are coaxially fixed on the rotating shaft (714) and the circumferential outer wall of the rotating rod (711), respectively.

3. The winnowing machine for removing iron filings and magnetic impurities in Chinese herbal medicine slices according to claim 1, characterized in that: A guide groove is provided on the front side surface of the vertical plate end of the vertical plate (71), and a guide block (710) is fixed on the rear side surface of the moving block (75) and is slidably connected to the guide groove on the front side surface of the vertical plate end of the vertical plate (71).

4. The winnowing machine for removing iron filings and magnetic impurities in Chinese herbal medicine slices according to claim 1, characterized in that: A feed funnel (3) connected to the inner cavity of the air separation box (2) is fixed on the top surface thereof, a feed valve (10) is installed on the outer wall of the tube body of the feed funnel (3), a discharge pipe (4) connected to the inner cavity of the air separation box (2) is fixed at the bottom end thereof, and electromagnetic valves (11) are installed on the outer walls of the discharge pipe (4) and the impurity discharge pipe (5).

5. The winnowing machine for removing iron filings and magnetic impurities in Chinese herbal medicine slices according to claim 1, characterized in that: A support plate (13) is fixed at the bottom end of the support column (12), and an anti-slip plate (14) matching its shape is fixed at the bottom end of the support plate (13), and the thickness of the anti-slip plate (14) is 2-7 cm.

6. The winnowing machine for removing iron filings and magnetic impurities in Chinese herbal medicine slices according to claim 1, characterized in that: The bottom end of the air separation box (2) is in a structure that is concave in all directions toward the middle, and the degree of concavity is 12-26 degrees.

7. The winnowing machine for removing iron filings and magnetic impurities in Chinese herbal medicine slices according to claim 2, characterized in that: The cleaning mechanism (7) further comprises a protection box (715) fixed on the top surface of the horizontal plate end of the vertical plate (71), the motor (713) is located inside the protection box (715), and the rotating shaft (714) passes through the top surface of the protection box (715).

8. The winnowing machine for removing iron filings and magnetic impurities in Chinese herbal medicine slices according to claim 3, characterized in that: The transverse cross-sectional shape of the guide groove on the front side surface of the vertical plate end of the vertical plate (71) is in a convex shape, and the shape of the guide block (710) is in a convex shape that matches the shape of the guide groove on the front side surface of the vertical plate end of the vertical plate (71).

9. The winnowing machine for removing iron filings and magnetic impurities in Chinese herbal medicine slices according to claim 4, characterized in that: The contact portions of the air separation box (2) with the feed hopper (3), the discharge pipe (4), the impurity discharge pipe (5) and the connecting rod (77) are all provided with sealing rings, and the contact portions of the air intake pipe (9) with the air separation box (2) and the blower (6) are also provided with sealing rings.

10. The winnowing machine for removing iron filings and magnetic impurities in Chinese herbal medicine slices according to claim 4, characterized in that: The brush rod (78) corresponds to the position of the magnetic filter (8), and the right side surface of the magnetic filter (8) and the left side surface of the brush rod (78) are located on the same plane.

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