A screening device for neodymium-iron-boron magnet production

Abstract

This utility model relates to the field of NdFeB screening technology and discloses a screening device for the production of NdFeB magnets, including a base and a screening tank mounted on the base. A feed hopper is provided on one side of the screening tank. An inner filter cylinder and an outer filter cylinder are provided inside the screening tank, coaxially arranged with the inner filter cylinder and the outer filter cylinder having larger filter holes than the outer filter cylinder. The bottom end of the feed hopper extends to the inner filter cylinder. A drive assembly is provided on the screening tank to drive the inner and outer filter cylinders to rotate in opposite directions. The drive assembly is equipped with a vibration assembly to drive the inner and outer filter cylinders to vibrate. A first discharge pipe, a second discharge pipe, a third discharge pipe, and a dispersion assembly for dispersing powder are respectively provided on the side of the screening tank away from the feed hopper. The advantages of this utility model compared to the prior art are: it facilitates increased contact area between the raw material and the inner and outer filter cylinders, and with vibration, it avoids clogging, facilitates the dispersion of agglomerated raw materials, and improves screening efficiency.

Description

Technical Field

[0001] This utility model relates to the field of neodymium iron boron screening technology, specifically to a screening device used in the production of neodymium iron boron magnets. Background Technology

[0002] The processing flow of neodymium iron boron magnets is divided into two parts: the front-end process and the back-end process. The front-end process mainly involves mixing raw materials such as praseodymium, neodymium, pure iron, and ferroboron in proportion. Before mixing, the raw materials need to be screened to avoid the presence of large particles, which can easily affect the quality of the subsequent finished products.

[0003] Existing screening equipment for neodymium iron boron magnet production mostly uses multi-layer parallel linear screens for screening, which results in uneven contact between the raw material and the screen and easily clogs the screen holes. In addition, when the raw material has high moisture content, it is prone to agglomeration, which in turn affects the screening effect. Utility Model Content

[0004] The technical problem this invention aims to solve is that the contact between the raw material and the screen is uneven, and the screen holes are easily clogged, with the raw material agglomerating and affecting the screening effect.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a screening device for the production of neodymium iron boron magnets, including a base and a screening tank disposed on the base. A feed hopper is provided on one side of the screening tank. An inner filter cylinder and an outer filter cylinder are provided inside the screening tank. The inner filter cylinder and the outer filter cylinder are coaxially arranged with the screening tank, and the filter holes of the inner filter cylinder are larger than those of the outer filter cylinder. The bottom end of the feed hopper extends to the inner filter cylinder. A drive assembly is provided on the screening tank to drive the inner filter cylinder and the outer filter cylinder to rotate in opposite directions. A vibration assembly is provided on the drive assembly to drive the inner filter cylinder and the outer filter cylinder to vibrate. A first discharge pipe, a second discharge pipe, a third discharge pipe, and a dispersion assembly for dispersing powder are respectively provided on the side of the screening tank away from the feed hopper. An outlet assembly is provided on the base to drive the raw material out of the screening tank.

[0006] Furthermore, the end face of the screening tank is provided with an inner ring groove and an outer ring groove, the end face of the inner filter cylinder is provided with an inner ring plate that slides with the inner ring groove, and the end face of the outer filter cylinder is provided with an outer ring plate that slides with the outer ring groove.

[0007] Furthermore, the drive assembly includes a first motor mounted on the screening tank. The power output end of the first motor rotates through the screening tank and has a drive gear at its end. The outer wall of the outer ring plate has a first external gear ring that meshes with the drive gear. The inner wall of the outer ring plate has an internal gear ring. The outer wall of the inner ring plate has a second external gear ring. The screening tank has a plurality of connecting shafts circumferentially distributed and rotating between the inner and outer filter cylinders. The connecting shafts have driven gears that mesh with the internal gear ring and the second external gear ring, respectively.

[0008] Furthermore, the vibration assembly includes several U-shaped rods disposed on the connecting shaft, and a vibration roller is provided in the middle of the U-shaped rods to strike the inner filter cylinder and the outer filter cylinder.

[0009] Furthermore, the dispersing component includes a second motor mounted on the screening tank, a first gear at the power output end of the second motor, a rotating drum rotatably passing through the middle of the screening tank, a second gear meshing with the first gear on the rotating drum, one end of the rotating drum being rotatably connected to a hot air pipe, and the other end extending to an inner filter cylinder, a plurality of dispersing rods and air inlets being evenly distributed around the circumference of the rotating drum, and an air outlet being provided at the top of the screening tank.

[0010] Furthermore, the first discharge pipe is located at the bottom end of the screening tank on the side away from the feed hopper, the second discharge pipe is located at the bottom end of the outer filter cylinder on the side away from the feed hopper, and the third discharge pipe is located at the bottom end of the inner filter cylinder on the side away from the feed hopper.

[0011] Furthermore, the output component includes a support rod on one side of the base plate, with the other end of the support rod hinged to both sides of the screening tank. A telescopic cylinder is provided on the other side of the base plate, and a sliding sleeve is hinged to the power end of the telescopic cylinder. Slide rails are provided on both sides of the screening tank, and the sliding sleeve slides through the slide rails.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] 1. The neodymium iron boron raw material is introduced into the inner filter cylinder from the feed hopper. The coaxial arrangement of the inner and outer filter cylinders facilitates grading and screening. The drive component drives the inner and outer filter cylinders to rotate, and the vibration component is coordinated to reduce the possibility of screening blockage and improve the screening effect. Then, the screened raw material is discharged through the first discharge pipe, the second discharge pipe and the third discharge pipe.

[0014] 2. The setting of the dispersion component facilitates the dispersing of agglomerated raw materials in the inner filter cartridge, thereby improving screening efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a screening device for the production of neodymium iron boron magnets according to this utility model.

[0016] Figure 2 This is a schematic diagram of the main cross-sectional structure of a screening equipment for the production of neodymium iron boron magnets according to this utility model.

[0017] Figure 3 yes Figure 2 A magnified structural diagram of A in the diagram.

[0018] Figure 4 This is a side cross-sectional schematic diagram of a screening equipment for the production of neodymium iron boron magnets according to this utility model.

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

[0020] As shown in the figure: 1. Screening tank, 2. Feed hopper, 3. Inner filter cylinder, 4. Outer filter cylinder, 5. Drive assembly, 6. Vibration assembly, 7. First discharge pipe, 8. Second discharge pipe, 9. Third discharge pipe, 10. Dispersion assembly, 11. Outlet assembly, 12. Inner ring groove, 13. Outer ring groove, 14. Inner ring plate, 15. Outer ring plate, 16. First motor, 17. Drive gear, 18. First outer gear ring, 19. Inner gear ring, 20. Second outer gear ring, 21. Connecting shaft, 22. Driven gear, 23. U-shaped rod, 24. Vibrating roller, 25. Second motor, 26. First gear, 27. Rotary drum, 28. Second gear, 29. Dispersion rod, 30. Air outlet, 31. Support rod, 32. Telescopic cylinder, 33. Sliding sleeve, 34. Slide rail. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Combined with appendix Figure 1 Appendix Figure 2 and attached Figure 3 A screening device for the production of neodymium iron boron magnets includes a base and a screening tank 1 mounted on the base. A feed hopper 2 is provided on one side of the screening tank 1. A first discharge pipe 7, a second discharge pipe 8, and a third discharge pipe 9 are respectively provided on the side of the screening tank 1 away from the feed hopper 2. An inner filter cylinder 3 and an outer filter cylinder 4 are provided inside the screening tank 1. The bottom end of the feed hopper 2 extends to the inner filter cylinder 3. The inner filter cylinder 3 and the outer filter cylinder 4 are coaxially arranged with the screening tank 1, and the filter holes of the inner filter cylinder 3 are larger than those of the outer filter cylinder 4. The end face of the screening tank 1 is provided with... The inner ring groove 12 and the outer ring groove 13 are provided. The inner ring plate 14 is provided on the end face of the inner filter cylinder 3, which is slidably engaged with the inner ring groove 12. The outer ring plate 15 is provided on the end face of the outer filter cylinder 4, which is slidably engaged with the outer ring groove 13. The first discharge pipe 7 is provided at the bottom end of the screening tank 1 on the side away from the feed hopper 2. The second discharge pipe 8 is provided at the bottom end of the outer filter cylinder 4 on the side away from the feed hopper 2. The third discharge pipe 9 is provided at the bottom end of the inner filter cylinder 3 on the side away from the feed hopper 2. The screening tank 1 is provided with a drive assembly 5 that can drive the inner filter cylinder 3 and the outer filter cylinder 4 to rotate in opposite directions.

[0023] The inner filter cylinder 3, outer filter cylinder 4, and screening tank 1 are arranged coaxially from the inside to the outside, which facilitates the three-stage screening of the raw material introduced from the feed hopper 2 into the inner filter cylinder 3. Since the filter holes of the inner filter cylinder 3 are larger than those of the outer filter cylinder 4, the screening particle size gradually decreases from the inside to the outside.

[0024] Combined with appendix Figure 3 and attached Figure 4 The drive assembly 5 includes a first motor 16 mounted on the screening tank 1. The power output end of the first motor 16 rotates through the screening tank 1 and has a drive gear 17 at its end. The outer wall of the outer ring plate 15 has a first external gear ring 18 that meshes with the drive gear 17. The inner wall of the outer ring plate 15 has an internal gear ring 19. The outer wall of the inner ring plate 14 has a second external gear ring 20. The screening tank 1 has a plurality of connecting shafts 21 circumferentially and evenly distributed between the inner filter cylinder 3 and the outer filter cylinder 4. The connecting shafts 21 have driven gears 22 that mesh with the internal gear ring 19 and the second external gear ring 20, respectively.

[0025] By starting the first motor 16, the first motor 16 drives the drive gear 17 to rotate forward. The drive gear 17 drives the outer ring plate 15 to rotate in reverse through meshing with the first outer gear ring 18. The outer ring plate 15 drives the connecting shaft 21 to rotate in reverse through meshing with the driven gear 22 via the inner gear ring 19. The driven gear 22 drives the inner ring plate 14 to rotate in the forward direction through meshing with the second outer gear ring 20. This causes the inner filter cylinder 3 and the outer filter cylinder 4 to rotate relative to each other, which facilitates a larger contact area for raw material filtration, improves filtration efficiency, and avoids clogging.

[0026] Combined with appendix Figure 3 The drive assembly 5 is equipped with a vibration assembly 6 that can drive the inner filter cartridge 3 and the outer filter cartridge 4 to vibrate. The vibration assembly 6 includes a plurality of U-shaped rods 23 on the connecting shaft 21. The middle part of the U-shaped rods 23 is provided with a vibrating roller 24 that can strike the inner filter cartridge 3 and the outer filter cartridge 4.

[0027] At the same time, the connecting shaft 21 drives the U-shaped rod 23 to rotate in reverse around the connecting shaft 21. The U-shaped rod 23 intermittently strikes and vibrates the inner filter cartridge 3 and the outer filter cartridge 4 through the vibrating roller 24 to prevent the filter holes of the inner filter cartridge 3 and the outer filter cartridge 4 from clogging and improve the filtration effect.

[0028] Combined with appendix Figure 5 The screening tank 1 is provided with a dispersion component 10 for dispersing powder on the side away from the feed hopper 2. The dispersion component 10 includes a second motor 25 on the screening tank 1. The power output end of the second motor 25 is provided with a first gear 26. A rotating drum 27 is rotatably provided in the middle of the screening tank 1. A second gear 28 that meshes with the first gear 26 is provided on the rotating drum 27. One end of the rotating drum 27 is rotatably connected to a hot air pipe, and the other end extends to the inner filter cylinder 3. Several dispersion rods 29 and air inlets are evenly distributed around the rotating drum 27. An air outlet 30 is provided at the top of the screening tank 1.

[0029] By starting the second motor 25, the second motor 25 drives the first gear 26, which in turn drives the rotating drum 27 to rotate through meshing with the second gear 28. Since one end of the rotating drum 27 is connected to the hot air pipe, it is convenient to introduce hot air into the screening tank 1 through the air inlet, which is convenient for heating and drying the wet material. The moisture is discharged through the air outlet 30. In addition, the rotating drum 27 drives the circumferential dispersing rod 29 to rotate, which is convenient for breaking up the agglomerated material and improving the screening efficiency.

[0030] Combined with appendix Figure 1 The base is provided with an output component 11 that can drive the raw material of the screening tank 1 to be discharged. The output component 11 includes a support rod 31 on one side of the base plate, the other end of the support rod 31 is hinged to the screening tank 1, and a telescopic cylinder 32 is provided on the other side of the base plate. The power end of the telescopic cylinder 32 is hinged to a sliding sleeve 33. Slide rails 34 are provided on both sides of the screening tank 1, and the sliding sleeve 33 slides through the slide rails 34.

[0031] After screening, the slide sleeve 33 can be driven to slide along the slide rail 34, which in turn causes the screening tank 1 to rotate and be lifted around the hinge point with the support rod 31. This facilitates the complete discharge of the screened raw materials in the screening tank 1 through the first discharge pipe 7, the second discharge pipe 8, and the third discharge pipe 9, thus avoiding residue.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A screening device for the production of neodymium iron boron magnets, comprising a base and a screening tank (1) disposed on the base, wherein a feed hopper (2) is provided on one side of the screening tank (1), characterized in that: The screening tank (1) is provided with an inner filter cylinder (3) and an outer filter cylinder (4). The inner filter cylinder (3) and the outer filter cylinder (4) are coaxially arranged with the screening tank (1) and the filter holes of the inner filter cylinder (3) are larger than those of the outer filter cylinder (4). The bottom end of the feed hopper (2) extends to the inner filter cylinder (3). The screening tank (1) is provided with a drive assembly (5) that can drive the inner filter cylinder (3) and the outer filter cylinder (4) to rotate in opposite directions. The drive assembly (5) is provided with a vibration assembly (6) that can drive the inner filter cylinder (3) and the outer filter cylinder (4) to vibrate. The screening tank (1) is provided with a first discharge pipe (7), a second discharge pipe (8), a third discharge pipe (9) and a dispersion assembly (10) for dispersing powder on the side away from the feed hopper (2). The base is provided with an outlet assembly (11) that can drive the raw material of the screening tank (1) to be discharged.

2. A screening device for the production of NdFeB magnets according to claim 1, characterized in that: The screening tank (1) has an inner ring groove (12) and an outer ring groove (13) on its end face. The inner filter cylinder (3) has an inner ring plate (14) that slides with the inner ring groove (12) on its end face. The outer filter cylinder (4) has an outer ring plate (15) that slides with the outer ring groove (13) on its end face.

3. A screening apparatus for the production of neodymium-iron-boron magnets according to claim 2, characterized in that The drive assembly (5) includes a first motor (16) mounted on the screening tank (1). The power output end of the first motor (16) rotates through the screening tank (1) and is provided with a drive gear (17) at the end. The outer wall of the outer ring plate (15) is provided with a first external gear ring (18) that meshes with the drive gear (17). The inner wall of the outer ring plate (15) is provided with an internal gear ring (19). The outer wall of the inner ring plate (14) is provided with a second external gear ring (20). The screening tank (1) is provided with a plurality of connecting shafts (21) circumferentially distributed and rotating between the inner filter cylinder (3) and the outer filter cylinder (4). The connecting shafts (21) are provided with driven gears (22). The driven gears (22) mesh with the internal gear ring (19) and the second external gear ring (20) respectively.

4. The screening apparatus for the production of Nd-Fe-B magnets according to claim 3, characterized in that The vibration assembly (6) includes several U-shaped rods (23) provided on the connecting shaft (21), and a vibration roller (24) is provided in the middle of the U-shaped rods (23) to strike the inner filter cylinder (3) and the outer filter cylinder (4).

5. A screening device for the production of NdFeB magnets according to claim 1, characterized in that: The dispersion component (10) includes a second motor (25) mounted on the screening tank (1). The power output end of the second motor (25) is provided with a first gear (26). A rotating drum (27) is rotatably mounted in the middle of the screening tank (1). A second gear (28) meshing with the first gear (26) is mounted on the rotating drum (27). One end of the rotating drum (27) is rotatably connected to the hot air pipe, and the other end extends to the inner filter cylinder (3). Several dispersion rods (29) and air inlets are evenly distributed around the rotating drum (27). An air outlet (30) is provided at the top of the screening tank (1).

6. The screening apparatus for neodymium iron boron magnet production according to claim 1, characterized in that: The first discharge pipe (7) is located at the bottom of the screening tank (1) on the side away from the feed hopper (2), the second discharge pipe (8) is located at the bottom of the outer filter cylinder (4) on the side away from the feed hopper (2), and the third discharge pipe (9) is located at the bottom of the inner filter cylinder (3) on the side away from the feed hopper (2).

7. The screening apparatus for neodymium-iron-boron magnet production according to claim 1, characterized in that: The output component (11) includes a support rod (31) on one side of the base plate, the other end of the support rod (31) is hinged to both sides of the screening tank (1), and a telescopic cylinder (32) is provided on the other side of the base plate. A sliding sleeve (33) is hinged to the power end of the telescopic cylinder (32). Slide rails (34) are provided on both sides of the screening tank (1), and the sliding sleeve (33) slides through the slide rails (34).

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