Magnetic separator for processing rice

By designing a multi-stage magnetic separator and utilizing a combination of strong magnetic rollers and a magnetic separation mechanism, multi-stage removal of metal impurities from rice was achieved, solving the problem of poor removal efficiency of existing magnetic separators and improving the processing quality of rice.

CN223970119UActive Publication Date: 2026-03-06TIANJIN FENGYING RICE IND CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-12
Publication Date
2026-03-06

AI Technical Summary

Technical Problem

Existing magnetic separators are ineffective at removing metal impurities from rice, which affects the quality of rice processing.

Method used

A multi-stage magnetic separator was designed, including a feed hopper, a guide plate, a strong magnetic roller, a secondary magnetic separation mechanism, and a tertiary magnetic separation mechanism. It removes metal impurities from rice through a multi-stage adsorption process. The combination of the strong magnetic roller and the magnetic separation mechanism, along with a motor, an electric push rod, and an adjustment device, achieves multi-stage removal.

Benefits of technology

This improves the processing quality of rice by removing metal impurities through multiple stages, ensuring the safety and quality of the rice.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223970119U_ABST
    Figure CN223970119U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of rice processing, in particular to a magnetic separator for processing rice, which can be used for removing metal impurities in the rice in a multi-stage manner, so that the processing quality of the rice is improved. Comprising a magnetic separation box, a feeding hopper, two sets of material guiding plates, two sets of strong magnetic rollers, a second-stage magnetic separation mechanism, a third-stage magnetic separation mechanism and two sets of adjusting devices, the feeding hopper is installed on the left side of the top end of the magnetic separation box and communicates with the magnetic separation box, the two sets of material guiding plates are obliquely installed on the upper portion in the magnetic separation box in a staggered mode, and the two sets of strong magnetic rollers are installed on the magnetic separation box through the two sets of adjusting devices correspondingly; the two groups of strong magnetic rollers are respectively close to the two groups of material guide plates, the second-stage magnetic separation mechanism is arranged at the left middle part in the magnetic separation box, the lower side material guide plate corresponds to the second-stage magnetic separation mechanism in position, and the third-stage magnetic separation mechanism is arranged at the right side of the bottom end in the magnetic separation box and is communicated with the second-stage magnetic separation mechanism.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the technical field of rice processing, and in particular to a magnetic separator for processing rice. Background Technology

[0002] Rice is one of the staple food crops in many countries around the world, especially in Asia. It is not only an important food source, but also plays a significant role in many aspects of culture and economy.

[0003] Magnetic separators in rice processing are mainly used to remove metal impurities from rice, ensuring the safety and quality of the final product. During rice processing, raw materials may contain various impurities, including but not limited to iron filings, screws, and other metal fragments. These impurities not only affect the quality of the rice but may also damage subsequent processing equipment. Therefore, it is essential to use magnetic separators for effective removal of metal impurities.

[0004] However, existing magnetic separators are not very effective at removing metal impurities, which affects the processing quality of rice. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a magnetic separator for processing rice, which can remove metal impurities from rice in multiple stages by setting this device, thereby improving the processing quality of rice.

[0006] This utility model discloses a magnetic separator for processing rice, comprising a magnetic separator box, a feed hopper, two sets of guide plates, two sets of strong magnetic rollers, a secondary magnetic separation mechanism, a tertiary magnetic separation mechanism, and two sets of adjusting devices. The feed hopper is installed on the top left side of the magnetic separator box and is connected to the magnetic separator box. The two sets of guide plates are installed alternately and inclined in the upper part of the magnetic separator box. The two sets of strong magnetic rollers are respectively installed on the magnetic separator box through the two sets of adjusting devices, and the two sets of strong magnetic rollers are close to the two sets of guide plates. The secondary magnetic separation mechanism is installed in the middle left part of the magnetic separator box, and the lower guide plate corresponds to the position of the secondary magnetic separation mechanism. The tertiary magnetic separation mechanism is installed in the bottom right side of the magnetic separator box and is connected to the secondary magnetic separation mechanism.

[0007] Preferably, the secondary magnetic separation mechanism includes a processing box, a first motor, a rotating shaft, multiple sets of strong magnetic bars, and a control valve. The processing box is installed in the middle of the left end inside the magnetic separation box, the first motor is installed in the middle of the bottom end of the processing box, the rotating shaft is rotatably installed in the bottom end of the processing box, the output end of the first motor passes through the bottom end of the processing box and connects to the bottom end of the rotating shaft, multiple sets of strong magnetic bars are installed on the rotating shaft, a guide pipe is connected to the right side of the bottom end of the processing box, and the control valve is installed on the guide pipe.

[0008] Preferably, the three-stage magnetic separation mechanism includes a vertical plate, two sets of columns, a guide trough, an adsorption box, a strong magnetic plate, an electric push rod, and a mounting plate. The vertical plate is installed on the bottom left side of the magnetic separator. The guide trough is installed on the top of the vertical plate via two sets of columns and is located below the guide pipe. The adsorption box is installed on the bottom right side of the magnetic separator. The guide trough and the adsorption box are positioned correspondingly. The strong magnetic plate and the adsorption box are positioned correspondingly. The strong magnetic plate is installed at the output end of the electric push rod. The electric push rod is installed on the mounting plate, and the mounting plate is installed on the lower right side of the magnetic separator.

[0009] Preferably, the adjusting device includes two sets of screws, two sets of moving blocks, two sets of first bevel gears, two sets of second bevel gears, two sets of rotating rods, and two sets of handwheels. The upper parts of the front and rear ends of the magnetic separator are symmetrically connected with sliding grooves. The two sets of screws are rotatably installed in the two sets of sliding grooves of the magnetic separator. The two sets of moving blocks slide in the two sets of sliding grooves of the magnetic separator. The strong magnetic roller is rotatably installed in the inner end of the two sets of moving blocks. The middle of each set of moving blocks is connected with a threaded hole. The two sets of moving blocks are threadedly connected to the two sets of screws. The two sets of first bevel gears are respectively installed on the upper part of the two sets of screws. The two sets of first bevel gears are respectively meshed with the two sets of second bevel gears. The two sets of second bevel gears are respectively installed on the two sets of rotating rods. The two sets of rotating rods are rotatably installed at the front and rear ends of the magnetic separator. The two sets of handwheels are respectively installed on the outer ends of the two sets of rotating rods.

[0010] Preferably, it also includes a second motor, a cam, eight sets of telescopic tubes, eight sets of telescopic rods, and eight sets of springs. The vertical plate has a movable opening in the middle. The second motor is installed at the rear end of the movable opening of the vertical plate. The cam is installed at the output end of the second motor and corresponds to the left end of the adsorption box. The eight sets of telescopic tubes are respectively installed at the right end of the vertical plate and the lower right end of the magnetic separator. The eight sets of telescopic rods are respectively installed at the left and right ends of the adsorption box. The eight sets of telescopic rods are slidably connected to the eight sets of telescopic tubes. The eight sets of springs are respectively sleeved on the eight sets of telescopic rods.

[0011] Preferably, it also includes four sets of limiting plates, which are respectively installed on the top of four sets of screws.

[0012] Preferably, it also includes two sets of scrapers, which are respectively installed at the bottom of the rotating shaft, and the bottom ends of the two sets of scrapers are in contact with the bottom end of the processing box.

[0013] Preferably, it also includes two sets of T-shaped slide rails and two sets of T-shaped sliders. The two sets of T-shaped slide rails are respectively installed at the front and rear of the bottom right side of the magnetic separator, and the two sets of T-shaped sliders are respectively installed at the front and rear of the bottom of the adsorption box. The two sets of T-shaped sliders are slidably connected to the two sets of T-shaped slide rails.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: Rice is fed into the upper guide plate in the magnetic separator through the feed hopper. The rice slides down the upper guide plate, and the upper strong magnetic roller initially adsorbs the metal impurities in the rice. Then, the rice slides down the lower guide plate, and the lower strong magnetic roller adsorbs the metal impurities in the rice again. After that, the rice is fed into the secondary magnetic separation mechanism to remove metal impurities, and then into the tertiary magnetic separation mechanism to remove metal impurities. By setting up this equipment, metal impurities in rice can be removed in multiple stages, thereby improving the processing quality of the rice. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 yes Figure 1 A schematic diagram of the rear view structure;

[0017] Figure 3 This is a top-view magnified structural diagram of the adsorption box;

[0018] Figure 4 yes Figure 1 A magnified structural diagram of A in the middle;

[0019] Figure 5 yes Figure 2 A magnified structural diagram of B in the diagram;

[0020] The following are labels in the attached diagram: 1. Magnetic separator; 2. Feed hopper; 3. Guide plate; 4. Strong magnetic roller; 5. Processing box; 6. First motor; 7. Rotating shaft; 8. Strong magnetic rod; 9. Guide pipe; 10. Control valve; 11. Vertical plate; 12. Column; 13. Guide trough plate; 14. Adsorption box; 15. Strong magnetic plate; 16. Electric push rod; 17. Mounting plate; 18. Screw; 19. Moving block; 20. First bevel gear; 21. Second bevel gear; 22. Rotating rod; 23. Handwheel; 24. Second motor; 25. Cam; 26. Telescopic tube; 27. Telescopic rod; 28. Spring; 29. ​​Limiting plate; 30. Scraper; 31. T-shaped slide rail; 32. T-shaped slider. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0022] like Figures 1 to 5As shown, this utility model discloses a magnetic separator for processing rice, comprising a magnetic separator box 1, a feed hopper 2, two sets of guide plates 3, two sets of strong magnetic rollers 4, a secondary magnetic separation mechanism, a tertiary magnetic separation mechanism, and two sets of adjustment devices. The feed hopper 2 is installed on the top left side of the magnetic separator box 1 and is connected to the magnetic separator box 1. The two sets of guide plates 3 are installed alternately and inclined in the upper part of the magnetic separator box 1. The two sets of strong magnetic rollers 4 are respectively installed on the magnetic separator box 1 through the two sets of adjustment devices, and the two sets of strong magnetic rollers 4 are close to the two sets of guide plates 3. The secondary magnetic separation mechanism is installed in the middle left part of the magnetic separator box 1, and the lower guide plate 3 corresponds to the position of the secondary magnetic separation mechanism. The tertiary magnetic separation mechanism is installed on the bottom right side of the magnetic separator box 1 and is connected to the secondary magnetic separation mechanism.

[0023] Rice is fed into the upper guide plate 3 inside the magnetic separator 1 through the feed hopper 2. The rice slides down the upper guide plate 3, and the upper strong magnetic roller 4 initially adsorbs the metal impurities in the rice. Then, the rice slides down the lower guide plate 3, and the lower strong magnetic roller 4 adsorbs the metal impurities in the rice again. After that, the rice is fed into the secondary magnetic separation mechanism to remove metal impurities, and then into the tertiary magnetic separation mechanism to remove metal impurities. By setting up this equipment, metal impurities in rice can be removed in multiple stages, thus improving the processing quality of the rice.

[0024] As a preferred embodiment of the above, the secondary magnetic separation mechanism includes a processing box 5, a first motor 6, a rotating shaft 7, multiple sets of strong magnetic rods 8, and a control valve 10. The processing box 5 is installed in the middle of the left end inside the magnetic separation box 1. The first motor 6 is installed in the middle of the bottom end of the processing box 5. The rotating shaft 7 is rotatably installed in the bottom end of the processing box 5. The output end of the first motor 6 passes through the bottom end of the processing box 5 and is connected to the bottom end of the rotating shaft 7. Multiple sets of strong magnetic rods 8 are installed on the rotating shaft 7. A guide pipe 9 is connected to the right side of the bottom end of the processing box 5. The control valve 10 is installed on the guide pipe 9.

[0025] By setting up a processing box 5, a first motor 6, a rotating shaft 7, strong magnetic rods 8, a feed pipe 9, and a control valve 10, rice is introduced into the processing box 5 through the lower feed plate 3. Then, the first motor 6 is turned on, which drives the rotating shaft 7 to rotate. The multiple sets of strong magnetic rods 8 on the rotating shaft 7 stir the rice, thereby adsorbing metal impurities in the rice. After that, the control valve 10 is opened, and the rice in the processing box 5 is introduced into the three-stage magnetic separation mechanism through the feed pipe 9, which can further improve the effect of removing metal impurities from the rice.

[0026] As a preferred embodiment of the above, the three-stage magnetic separation mechanism includes a vertical plate 11, two sets of columns 12, a guide trough plate 13, an adsorption box 14, a strong magnetic plate 15, an electric push rod 16, and a mounting plate 17. The vertical plate 11 is installed on the left side of the bottom end inside the magnetic separator 1. The guide trough plate 13 is installed on the top of the vertical plate 11 through the two sets of columns 12. The guide trough plate 13 is located below the guide pipe 9. The adsorption box 14 is installed on the right side of the bottom end inside the magnetic separator 1. The guide trough plate 13 and the adsorption box 14 are positioned correspondingly. The strong magnetic plate 15 and the adsorption box 14 are positioned correspondingly. The strong magnetic plate 15 is installed at the output end of the electric push rod 16. The electric push rod 16 is installed on the mounting plate 17. The mounting plate 17 is installed on the lower right side inside the magnetic separator 1.

[0027] By setting up a vertical plate 11, a column 12, a guide trough plate 13, an adsorption box 14, a strong magnetic plate 15, an electric push rod 16, and a mounting plate 17, the rice discharged from the guide pipe 9 is guided into the adsorption box 14 through the guide trough plate 13. Then, the electric push rod 16 is opened, which drives the strong magnetic plate 15 to move downward to a suitable distance from the rice. The strong magnetic plate 15 removes metal impurities from the rice, which can improve the effect of removing metal impurities from the rice.

[0028] As a preferred embodiment of the above, the adjusting device includes two sets of screws 18, two sets of moving blocks 19, two sets of first bevel gears 20, two sets of second bevel gears 21, two sets of rotating rods 22, and two sets of handwheels 23. The upper parts of the front and rear ends of the magnetic separator 1 are symmetrically connected with sliding grooves. The two sets of screws 18 are rotatably installed in the two sets of sliding grooves of the magnetic separator 1. The two sets of moving blocks 19 slide in the two sets of sliding grooves of the magnetic separator 1. The strong magnetic roller 4 is rotatably installed in the inner end of the two sets of moving blocks 19. The middle part of the two sets of moving blocks 19 is connected with threaded holes. The two sets of moving blocks 19 are threadedly connected to the two sets of screws 18. The two sets of first bevel gears 20 are respectively installed on the upper part of the two sets of screws 18. The two sets of first bevel gears 20 are respectively meshed with the two sets of second bevel gears 21. The two sets of second bevel gears 21 are respectively installed on the two sets of rotating rods 22. The two sets of rotating rods 22 are rotatably installed at the front and rear ends of the magnetic separator 1. The two sets of handwheels 23 are respectively installed on the outer ends of the two sets of rotating rods 22.

[0029] By setting up screws 18, moving blocks 19, first bevel gears 20, second bevel gears 21, rotating rods 22, and handwheels 23, the four sets of handwheels 23 drive the four sets of second bevel gears 21 on the four sets of rotating rods 22 to rotate. The four sets of second bevel gears 21 mesh with the four sets of first bevel gears 20. The four sets of first bevel gears 20 drive the four sets of screws 18 to rotate. The four sets of screws 18 are threadedly connected to the four sets of moving blocks 19. The four sets of moving blocks 19 adjust the distance between the two sets of strong magnetic rollers 4 and the two sets of guide plates 3, so as to facilitate the adjustment of the distance between the two sets of strong magnetic rollers 4 and the two sets of guide plates 3 according to the grain size of rice.

[0030] As a preferred embodiment of the above, it also includes a second motor 24, a cam 25, eight sets of telescopic tubes 26, eight sets of telescopic rods 27, and eight sets of springs 28. The middle of the upright plate 11 is provided with a movable opening. The second motor 24 is installed at the rear end of the movable opening of the upright plate 11. The cam 25 is installed at the output end of the second motor 24. The cam 25 corresponds to the left end of the adsorption box 14. The eight sets of telescopic tubes 26 are respectively installed at the right end of the upright plate 11 and the lower right end of the magnetic separator 1. The eight sets of telescopic rods 27 are respectively installed at the left and right ends of the adsorption box 14. The eight sets of telescopic rods 27 are slidably connected to the eight sets of telescopic tubes 26. The eight sets of springs 28 are respectively sleeved on the eight sets of telescopic rods 27.

[0031] By setting up a second motor 24, a cam 25, a telescopic tube 26, a telescopic rod 27, and a spring 28, the second motor 24 is turned on, which drives the cam 25 to rotate. The cam 25 then drives the adsorption box 14 to move. Under the action of eight sets of telescopic tubes 26, eight sets of telescopic rods 27, and eight sets of springs 28, the adsorption box 14 sways left and right, which allows the strong magnetic plate 15 to fully adsorb metal impurities from the rice in the adsorption box 14, thus improving the rice impurity removal effect.

[0032] As a preferred embodiment of the above embodiment, it also includes four sets of limiting plates 29, which are respectively installed on the top of four sets of screws 18;

[0033] By setting the limiting plate 29, collisions between the moving block 19 and the first bevel gear 20 can be avoided.

[0034] As a preferred embodiment of the above embodiment, it also includes two sets of scrapers 30, which are respectively installed at the bottom of the rotating shaft 7, and the bottom ends of the two sets of scrapers 30 are in contact with the bottom end of the processing box 5.

[0035] By setting up the scraper 30, not only can rice be prevented from settling at the bottom of the processing tank 5, but it is also convenient to discharge the rice from the processing tank 5.

[0036] As a preferred embodiment of the above, it also includes two sets of T-shaped slide rails 31 and two sets of T-shaped sliders 32. The two sets of T-shaped slide rails 31 are respectively installed at the front and rear of the bottom right side of the magnetic separator 1, and the two sets of T-shaped sliders 32 are respectively installed at the front and rear of the bottom of the adsorption box 14. The two sets of T-shaped sliders 32 are slidably connected to the two sets of T-shaped slide rails 31.

[0037] By setting up T-shaped slide rail 31 and T-shaped slider 32, the stability of the adsorption box 14 when it shakes left and right can be improved.

[0038] This utility model discloses a magnetic separator for processing rice. During operation, rice is first fed through a hopper 2 onto an upper guide plate 3 inside a magnetic separator box 1. The rice slides down the upper guide plate 3, where an upper strong magnetic roller 4 initially adsorbs metallic impurities. Then, the rice slides down the lower guide plate 3, where the lower strong magnetic roller 4 again adsorbs metallic impurities. The rice is then fed into a processing box 5. A first motor 6 is activated, driving a rotating shaft 7. Multiple sets of strong magnetic rods 8 on the rotating shaft 7 stir the rice, thereby further removing metallic impurities. After adsorption, the control valve 10 is opened, and the rice in the processing box 5 is introduced into the adsorption box 14 through the guide pipe 9 and the guide trough plate 13. By opening the electric push rod 16, the electric push rod 16 drives the strong magnetic plate 15 to move downward to a suitable distance from the rice. Then, the second motor 24 is turned on, and the second motor 24 drives the cam 25 to rotate. The cam 25 drives the adsorption box 14 to move. Under the action of eight sets of telescopic pipes 26, eight sets of telescopic rods 27 and eight sets of springs 28, the adsorption box 14 shakes left and right, so that the strong magnetic plate 15 can fully adsorb the metal impurities in the rice in the adsorption box 14.

[0039] The magnetic separator for processing rice according to this utility model has common mechanical installation, connection and setting methods. As long as it can achieve the beneficial effect, it can be implemented. The first motor 6, electric push rod 16 and second motor 24 of the magnetic separator for processing rice according to this utility model are purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A magnetic separator for processing rice, characterized by, The utility model relates to a magnetic separation device, including magnetic separation box (1), feed hopper (2), two sets of guide plate (3), two sets of strong magnetic roller (4), secondary magnetic separation mechanism, tertiary magnetic separation mechanism and two sets of adjusting device, feed hopper (2) is installed in the top left side of magnetic separation box (1), feed hopper (2) communicates with magnetic separation box (1), two sets of guide plate (3) staggered inclination is installed in the upper portion in magnetic separation box (1), two sets of strong magnetic roller (4) are installed on magnetic separation box (1) through two sets of adjusting device respectively, two sets of strong magnetic roller (4) are close to two sets of guide plate (3) respectively, secondary magnetic separation mechanism is installed in the left middle part in magnetic separation box (1), the lower guide plate (3) is corresponding with the position of secondary magnetic separation mechanism, tertiary magnetic separation mechanism is installed in the bottom right side in magnetic separation box (1), and tertiary magnetic separation mechanism communicates with secondary magnetic separation mechanism.

2. A magnetic separator for processing rice as claimed in claim 1 wherein, Secondary magnetic separation mechanism includes processing box (5), first motor (6), shaft (7), multiple strong magnetic bar (8) and control valve (10), processing box (5) is installed in the left end middle part in magnetic separation box (1), first motor (6) is installed in the bottom middle part of processing box (5), shaft (7) is rotatably installed in the bottom end in processing box (5), and the output end of first motor (6) is connected with the bottom end of shaft (7) through the bottom end of processing box (5), multiple strong magnetic bar (8) is installed on shaft (7), and the bottom right side of processing box (5) is provided with guide pipe (9) in communication, and control valve (10) is installed on guide pipe (9).

3. A magnetic separator for processing rice as claimed in claim 2 wherein, Tertiary magnetic separation mechanism includes vertical plate (11), two sets of stand column (12), guide groove plate (13), adsorption box (14), strong magnetic plate (15), electric push rod (16) and mounting plate (17), vertical plate (11) is installed in the bottom left side in magnetic separation box (1), guide groove plate (13) is installed on the top of vertical plate (11) through two sets of stand column (12), and guide groove plate (13) is located below guide pipe (9), adsorption box (14) is installed in the bottom right side in magnetic separation box (1), and guide groove plate (13) is corresponding with the position of adsorption box (14), strong magnetic plate (15) is corresponding with the position of adsorption box (14), and strong magnetic plate (15) is installed on the output end of electric push rod (16), and electric push rod (16) is installed on mounting plate (17), and mounting plate (17) is installed in the right lower side in magnetic separation box (1).

4. A magnetic separator for processing rice as claimed in claim 3 wherein, The adjusting device comprises two groups of screw rods (18), two groups of moving blocks (19), two groups of first bevel gears (20), two groups of second bevel gears (21), two groups of rotating rods (22) and two groups of hand wheels (23), the upper parts of the front end and the rear end of the magnetic separation box (1) are symmetrically and communicatively provided with sliding grooves, the two groups of screw rods (18) are rotatably installed in the two groups of sliding grooves of the magnetic separation box (1), the two groups of moving blocks (19) slide in the two groups of sliding grooves of the magnetic separation box (1), the strong magnetic roller (4) is rotatably installed at the inner ends of the two groups of moving blocks (19), the middle parts of the two groups of moving blocks (19) are communicatively provided with threaded holes, the two groups of moving blocks (19) are threadedly connected with the two groups of screw rods (18), the two groups of first bevel gears (20) are installed on the upper parts of the two groups of screw rods (18) respectively, the two groups of first bevel gears (20) are engaged with the two groups of second bevel gears (21) respectively, the two groups of second bevel gears (21) are installed on the two groups of rotating rods (22) respectively, the two groups of rotating rods (22) are rotatably installed at the front end and the rear end of the magnetic separation box (1), and the two groups of hand wheels (23) are installed at the outer ends of the two groups of rotating rods (22) respectively.

5. A magnetic separator for processing rice as claimed in claim 4 wherein, The adjusting device further comprises a second motor (24), a cam (25), eight groups of telescopic pipes (26), eight groups of telescopic rods (27) and eight groups of springs (28), the middle part of the vertical plate (11) is communicatively provided with a movable opening, the second motor (24) is installed at the rear end of the movable opening of the vertical plate (11), the cam (25) is installed at the output end of the second motor (24), the cam (25) corresponds to the left end position of the adsorption box (14), the eight groups of telescopic pipes (26) are installed at the right end of the vertical plate (11) and the lower side of the right end in the magnetic separation box (1) respectively, the eight groups of telescopic rods (27) are installed at the left end and the right end of the adsorption box (14) respectively, the eight groups of telescopic rods (27) are slidably connected with the eight groups of telescopic pipes (26) respectively, and the eight groups of springs (28) are sleeved on the eight groups of telescopic rods (27) respectively.

6. A magnetic separator for processing rice as claimed in claim 5 wherein, The adjusting device further comprises four groups of limiting plates (29), and the four groups of limiting plates (29) are installed at the top parts of the four groups of screw rods (18) respectively.

7. A magnetic separator for processing rice as claimed in claim 6 wherein, The adjusting device further comprises two groups of scrapers (30), the two groups of scrapers (30) are installed at the bottom parts of the rotating shafts (7), and the bottom ends of the two groups of scrapers (30) are in contact with the inner bottom ends of the processing box (5).

8. A magnetic separator for processing rice as claimed in claim 7 wherein, The adjusting device further comprises two groups of T-shaped sliding rails (31) and two groups of T-shaped sliding blocks (32), the two groups of T-shaped sliding rails (31) are installed at the front part and the rear part of the inner bottom right side of the magnetic separation box (1) respectively, the two groups of T-shaped sliding blocks (32) are installed at the front side and the rear side of the bottom end of the adsorption box (14) respectively, and the two groups of T-shaped sliding blocks (32) are slidably connected with the two groups of T-shaped sliding rails (31) respectively.