Neodymium iron boron magnetic powder drying device

Abstract

The invention relates to the technical field of drying devices, and discloses a neodymium iron boron magnetic powder drying device which solves the problems that an existing drying device is poor in drying uniformity and cannot achieve continuous drying, the neodymium iron boron magnetic powder drying device comprises a supporting frame, and a drying cover is fixedly arranged in the middle of the top end of the supporting frame; a neodymium iron boron magnetic powder feeding mechanism connected with the drying cover is arranged on the side edge of the top end of the supporting frame, a plurality of air supply mechanisms are fixedly arranged on the side edge of the drying cover, a spiral discharging machine is fixedly arranged at the bottom end of the drying cover, and a controller is fixedly arranged on one side of the top end of the supporting frame. The drying cover is composed of a plurality of airflow drying lifting pipes, an exhaust cover, a center supporting disc, a plurality of suspension arms, a breathable filtering net cover, a center discharging pipe and a discharging flow guide cover. By means of the drying device, continuous dust-free drying can be achieved, and the drying efficiency and the drying uniformity are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of drying devices, and specifically relates to a neodymium iron boron magnetic powder drying device. Background Art

[0002] Neodymium iron boron magnetic powder is the raw material for making neodymium iron boron magnets. In the production process of neodymium iron boron magnets, the neodymium iron boron magnetic powder needs to be compacted and sintered, and finally magnetized. The neodymium iron boron magnetic powder needs to be dried before compaction, which can improve the processing quality. The existing drying devices are not convenient for continuously drying the neodymium iron boron magnetic powder, and have the disadvantage of poor drying uniformity, affecting the drying efficiency. Therefore, this application proposes a neodymium iron boron magnetic powder drying device. Summary of the Invention

[0003] In view of the above situation, to overcome the defects of the prior art, the present invention provides a neodymium iron boron magnetic powder drying device, effectively solving the problems of poor drying uniformity and inability to achieve continuous drying of the existing drying devices.

[0004] To achieve the above object, the present invention provides the following technical solution: A neodymium iron boron magnetic powder drying device, including a support frame. In the middle position of the top end of the support frame, a drying hood is fixedly arranged. On the side of the top end of the support frame, a neodymium iron boron magnetic powder feeding mechanism connected to the drying hood is arranged. On the side of the drying hood, a plurality of air supply mechanisms are fixedly arranged. At the bottom end of the drying hood, a spiral discharge machine is fixedly arranged. On one side of the top end of the support frame, a controller is fixedly arranged;

[0005] The drying hood is composed of a plurality of air flow drying and lifting pipes, an exhaust hood, a central support disk, a plurality of suspension arms, a breathable filter mesh hood, a central blanking pipe, and a blanking diversion hood. The central blanking pipe is fixedly connected to the support frame, and the bottom end of the central blanking pipe is connected to the spiral discharge machine. The exhaust hood is fixedly connected to the middle position of the top end of the central blanking pipe. The air flow drying and lifting pipes are fixedly connected to the bottom end of the side of the exhaust hood. The central support disk is fixedly connected to the middle position of the bottom end of the exhaust hood through the suspension arms. The breathable filter mesh hood is connected between the central support disk and the exhaust hood. The blanking diversion hood is fixedly connected to the top end inside the central blanking pipe. The air flow drying and lifting pipes are connected to the neodymium iron boron magnetic powder feeding mechanism and the air supply mechanisms. In the middle position of the top end of the central support disk, a double-shaft motor is fixedly arranged. Inside the exhaust hood, an axial flow fan fixedly connected to the output shaft of the double-shaft motor is arranged. Inside the top end of the central blanking pipe, an auxiliary blanking mechanism connected to the double-shaft motor is arranged.

[0006] Preferably, an air inlet connected to the air supply mechanism is opened at the middle position of the bottom end of the air flow drying and lifting pipe, a feeding port connected to the neodymium iron boron magnetic powder feeding mechanism is opened at the bottom end of the side of the air flow drying and lifting pipe, and a discharge port connected to the spiral discharge machine is opened at the bottom end of the central blanking pipe.

[0007] Preferably, the neodymium iron boron magnetic powder feeding mechanism is composed of an annular material leveling cover, a screw feeder, a feeding hopper, a plurality of feeding funnels, a magnetic coupling drive assembly, a material pushing assembly and a plugging assembly. The annular material leveling cover is sleeved on the air flow drying and lifting pipe and fixedly connected thereto. The screw feeder is fixedly connected to one side of the annular material leveling cover. The feeding hopper is fixedly connected to the top of the screw feeder. The magnetic coupling drive assembly is sleeved on the air flow drying and lifting pipe and rotatably connected thereto. The material pushing assembly is rotatably connected to the inside of the annular material leveling cover. The feeding funnel is fixedly connected between the annular material leveling cover and the air flow drying and lifting pipe. The plugging assembly is connected between the feeding funnel and the annular material leveling cover.

[0008] Preferably, the magnetic coupling drive assembly is composed of a support ring 1, a bearing 1, a plurality of electromagnets 1, a servo motor and a roller. The support ring 1 is connected to the air flow drying and lifting pipe through the bearing 1. The electromagnet 1 is fixedly connected to the bottom end inside the support ring 1. The servo motor is fixedly connected to one side of the support ring 1. The roller is fixedly connected to the output shaft of the servo motor and fits with the top of the annular material leveling cover.

[0009] Preferably, the material pushing assembly is composed of a bracket, a support ring 2, a plurality of iron blocks 1, a plurality of connecting rods and a plurality of scraping plates. The bracket is fixedly connected to the top end inside the annular material leveling cover. The support ring 2 is rotatably connected to the inside of the bracket. The iron block 1 is fixedly connected to the top end of the support ring 2 and matches with the electromagnet 1. The connecting rod is fixedly connected to the bottom end of the support ring 2. The scraping plate is fixedly connected to the bottom end of the connecting rod and fits with the inner side wall of the annular material leveling cover.

[0010] Preferably, a plurality of universal ball bearings are rotatably arranged at the bottom end of the support ring 2, and the universal ball bearings fit with the bottom surface inside the bracket.

[0011] Preferably, the plugging assembly is composed of a cylinder and a plugging plate. The cylinder is fixedly connected to the bottom end of the annular material leveling cover. The plugging plate is slidably inserted into the feeding funnel and fixedly connected to one end of the cylinder.

[0012] Preferably, the air supply mechanism is composed of a sealing cover, an air filter, an induction heating coil, a gas duct, a small fan and a blowing nozzle. The sealing cover is sleeved on the air flow drying and lifting pipe and fixedly connected thereto. The induction heating coil is located inside the sealing cover and sleeved on the air flow drying and lifting pipe. The air filter is fixedly connected to the side of the top end of the sealing cover. The gas duct is fixedly connected to the side of the bottom end of the sealing cover. The small fan is fixedly connected to the top end of the support frame and connected to the gas duct. The blowing nozzle is fixedly connected between the small fan and the air flow drying and lifting pipe.

[0013] Preferably, the auxiliary blanking mechanism is composed of a number of rotating sleeves, a number of scraping bars, a number of electromagnets II, a number of iron blocks II, a bearing II, a rotating shaft and a centrifugal blanking disc. The rotating sleeve is rotationally connected to the middle position at the bottom of the exhaust hood through the bearing II and sleeved on the output shaft of the double-shaft motor. The scraping bar is fixedly connected to the side of the rotating sleeve and fits against the outer side of the air-permeable filter mesh cover. The iron block II is fixedly connected to the inner side wall of the rotating sleeve. The electromagnet II is fixedly connected to the output shaft of the double-shaft motor and matches the iron block II. The rotating shaft is connected to the bottom end of the output shaft of the double-shaft motor. The centrifugal blanking disc is fixedly connected to the bottom end of the rotating shaft and is located inside the blanking diversion hood.

[0014] Preferably, an extension shaft is fixedly arranged at the top end of the rotating shaft. The extension shaft slidably penetrates through the bottom end of the output shaft of the double-shaft motor. A spring is fixedly arranged between the rotating shaft and the output shaft of the double-shaft motor.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] (1) During operation, by providing a drying hood composed of a number of air-flow drying lifting pipes, an exhaust hood, a central support disc, a number of suspension arms, an air-permeable filter mesh cover, a central blanking pipe and a blanking diversion hood, and by providing a double-shaft motor, an axial-flow fan, a neodymium iron boron magnetic powder feeding mechanism, a gas supply mechanism and a screw discharge machine, continuous drying treatment of neodymium iron boron magnetic powder can be achieved. During the drying process, the diffusion of neodymium iron boron magnetic powder into the external air can be avoided, achieving dust-free drying. Through the air-lifting drying design, the uniformity and sufficiency of drying can be effectively improved;

[0017] (2) By providing a neodymium iron boron magnetic powder feeding mechanism composed of an annular material leveling hood, a screw feeder, a feeding hopper, a number of feeding funnels, a magnetic coupling drive assembly, a material pushing assembly and a plugging assembly, continuous and uniform feeding of neodymium iron boron magnetic powder can be achieved, enabling the neodymium iron boron magnetic powder to uniformly enter the interiors of a number of air-flow drying lifting pipes, thereby realizing the drying operation;

[0018] (3) By providing a gas supply mechanism composed of a sealing hood, an air filter, an induction heating coil, a gas pipe, a small fan and a blowing nozzle, local heating of the air-flow drying lifting pipes can be achieved, and at the same time, hot air can be fed into the interiors of the air-flow drying lifting pipes. The high temperature inside the air-flow drying lifting pipes and the hot air drive the neodymium iron boron magnetic powder to tumble. When the neodymium iron boron magnetic powder is in a dry state, its weight becomes lighter, so that the neodymium iron boron magnetic powder can be blown upward by the lifting force of the air flow. The neodymium iron boron magnetic powder and the wet air form a diversion effect at the exhaust hood position, and the neodymium iron boron magnetic powder and the wet air are discharged separately;

[0019] (4) By providing an auxiliary blanking mechanism composed of a number of rotating sleeves, a number of scraping bars, a number of electromagnets II, a number of iron blocks II, a bearing II, a rotating shaft and a centrifugal blanking disc, it is possible to achieve quantitative blanking of the dried neodymium iron boron magnetic powder. During the blanking process, the central blanking pipe can be kept in a closed state, preventing the neodymium iron boron magnetic powder inside the central blanking pipe from being affected by the air flow. The closed state of the central blanking pipe can also assist in separating the neodymium iron boron magnetic powder from the wet air. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings are provided to further understand the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0021] In the drawings:

[0022] Figure 1 is a schematic structural view of the neodymium iron boron magnetic powder drying device of the present invention;

[0023] Figure 2 is a cross-sectional view of the neodymium iron boron magnetic powder drying device of the present invention;

[0024] Figure 3 is of the present invention Figure 2 partial enlarged view;

[0025] Figure 4 is a schematic structural view of the drying hood of the present invention;

[0026] Figure 5 is a schematic structural view of the neodymium iron boron magnetic powder feeding mechanism of the present invention;

[0027] Figure 6 is of the present invention Figure 5 partial enlarged view;

[0028] Figure 7 is a schematic structural view of the air supply mechanism of the present invention;

[0029] Figure 8 is a schematic structural view of the auxiliary blanking mechanism of the present invention;

[0030] Figure 9 is of the present invention Figure 8 partial enlarged view at A in;

[0031] In the figure: 1, support frame; 2, drying hood; 3, neodymium iron boron magnetic powder feeding mechanism; 4, air supply mechanism; 5, spiral discharge machine; 6, controller; 7, air flow drying riser; 8, exhaust hood; 9, central support disk; 10, jib; 11, breathable filter mesh hood; 12, central feeding pipe; 13, feeding guide hood; 14, double-shaft motor; 15, axial flow fan; 16, auxiliary feeding mechanism; 17, air inlet; 18, feed inlet; 19, discharge port; 20, annular material leveling hood; 21, spiral feeder; 22, feeding hopper; 23, feeding funnel; 24, magnetic coupling drive assembly; 25, pushing component; 26, plugging component; 27, first support ring; 28, first bearing; 29, first electromagnet; 30, servo motor; 31, roller; 32, bracket; 33, second support ring; 34, first iron block; 35, connecting rod; 36, scraper; 37, universal ball; 38, cylinder; 39, plugging plate; 40, sealing hood; 41, air filter; 42, induction heating coil; 43, air duct; 44, small fan; 45, air blowing nozzle; 46, rotating sleeve; 47, scraping bar; 48, second electromagnet; 49, second iron block; 50, second bearing; 51, rotating shaft; 52, centrifugal feeding disk; 53, extension shaft; 54, spring. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0033] An embodiment is given by Figures 1 to 9 A neodymium iron boron magnetic powder drying device of the present invention includes a support frame 1. A drying hood 2 is fixedly arranged at the middle position of the top end of the support frame 1. A neodymium iron boron magnetic powder feeding mechanism 3 connected to the drying hood 2 is arranged on the side of the top end of the support frame 1. A plurality of air supply mechanisms 4 are fixedly arranged on the side of the drying hood 2. A spiral discharge machine 5 is fixedly arranged at the bottom end of the drying hood 2. A controller 6 is fixedly arranged on one side of the top end of the support frame 1;

[0034] The drying hood 2 realizes the drying operation. The neodymium iron boron magnetic powder feeding mechanism 3 realizes continuous feeding of the neodymium iron boron magnetic powder. The air supply mechanism 4 can supply hot air flow into the drying hood 2, thereby realizing the drying operation. The spiral discharge machine 5 realizes discharging of the dried neodymium iron boron magnetic powder;

[0035] The drying hood 2 is composed of several air-flow drying and lifting pipes 7, an exhaust hood 8, a central support disk 9, several lifting arms 10, a breathable filter mesh hood 11, a central blanking pipe 12, and a blanking diversion hood 13. The central blanking pipe 12 is fixedly connected to the support frame 1. The bottom end of the central blanking pipe 12 is connected to the screw discharger 5. The exhaust hood 8 is fixedly connected to the middle position at the top end of the central blanking pipe 12. The air-flow drying and lifting pipe 7 is fixedly connected to the bottom end of the side of the exhaust hood 8. The central support disk 9 is fixedly connected to the middle position at the bottom end of the exhaust hood 8 through the lifting arms 10. The breathable filter mesh hood 11 is connected between the central support disk 9 and the exhaust hood 8. The blanking diversion hood 13 is fixedly connected to the top end inside the central blanking pipe 12. The air-flow drying and lifting pipe 7 is connected to the NdFeB magnetic powder feeding mechanism 3 and the air supply mechanism 4. A two-shaft motor 14 is fixedly arranged at the middle position at the top end of the central support disk 9. An axial flow fan 15 fixedly connected to the output shaft of the two-shaft motor 14 is arranged at the middle position inside the exhaust hood 8. An auxiliary blanking mechanism 16 connected to the two-shaft motor 14 is arranged at the top end inside the central blanking pipe 12;

[0036] Hot air flow and NdFeB magnetic powder enter the inside of the air-flow drying and lifting pipe 7. The NdFeB magnetic powder in a wet state is heavy and can tumble at the bottom end inside the air-flow drying and lifting pipe 7 by the action of the air flow. The wet air generated by drying is discharged upward. When the NdFeB magnetic powder is in a dry state, its weight is reduced and it can flow upward orderly following the action of the air flow. At the same time, the size of the air flow can also be controlled to realize feeding. The axial flow fan 15 realizes exhaust, and the breathable filter mesh hood 11 realizes the filtering function. The wet air is discharged through the exhaust hood 8. The auxiliary blanking mechanism 16 can scrape the material on the breathable filter mesh hood 11 to avoid blockage of the breathable filter mesh hood 11. The central blanking pipe 12 is in a closed state, and the air flow inside it is in a relatively static state. When the dry NdFeB magnetic powder enters the inside of the central blanking pipe 12, it will not be affected by the air flow and then slowly falls under its own gravity. The blanking diversion hood 13 can cooperate with the auxiliary blanking mechanism 16 to intercept the NdFeB magnetic powder and make the NdFeB magnetic powder discharge orderly. At this time, the sealing state of the central blanking pipe 12 can be further improved by the NdFeB magnetic powder;

[0037] An air inlet 17 connected to the air supply mechanism 4 is opened at the middle position at the bottom end of the air-flow drying and lifting pipe 7. A feed inlet 18 connected to the NdFeB magnetic powder feeding mechanism 3 is opened at the bottom end of the side of the air-flow drying and lifting pipe 7. A discharge port 19 connected to the screw discharger 5 is opened at the bottom end of the central blanking pipe 12. The air inlet 17 realizes air intake, the feed inlet 18 realizes feeding, and the discharge port 19 realizes discharging;

[0038] The neodymium iron boron magnetic powder feeding mechanism 3 is composed of an annular material leveling cover 20, a spiral feeder 21, a feeding hopper 22, a number of feeding funnels 23, a magnetic coupling drive assembly 24, a material pushing assembly 25 and a blocking assembly 26. The annular material leveling cover 20 is sleeved on the air flow drying and lifting pipe 7 and fixedly connected thereto. The spiral feeder 21 is fixedly connected to one side of the annular material leveling cover 20. The feeding hopper 22 is fixedly connected to the top of the spiral feeder 21. The magnetic coupling drive assembly 24 is sleeved on the air flow drying and lifting pipe 7 and rotatably connected thereto. The material pushing assembly 25 is rotatably connected to the inside of the annular material leveling cover 20. The feeding funnel 23 is fixedly connected between the annular material leveling cover 20 and the air flow drying and lifting pipe 7. The blocking assembly 26 is connected between the feeding funnel 23 and the annular material leveling cover 20;

[0039] The spiral feeder 21 and the feeding hopper 22 can feed materials into the inside of the annular material leveling cover 20. During the rotation of the magnetic coupling drive assembly 24, it can drive the material pushing assembly 25 to rotate synchronously. By means of the material pushing assembly 25, the neodymium iron boron magnetic powder is pushed and realizes circular motion. The neodymium iron boron magnetic powder can enter the inside of the air flow drying and lifting pipe 7 through the feeding funnel 23. The feeding funnel 23 can be temporarily closed through the blocking assembly 26, thereby improving the uniformity of feeding and making the materials in each feeding funnel 23 balanced;

[0040] The magnetic coupling drive assembly 24 is composed of a support ring one 27, a bearing one 28, a number of electromagnets one 29, a servo motor 30 and a roller 31. The support ring one 27 is connected to the air flow drying and lifting pipe 7 through the bearing one 28. The electromagnet one 29 is fixedly connected to the bottom end inside the support ring one 27. The servo motor 30 is fixedly connected to one side of the support ring one 27. The roller 31 is fixedly connected to the output shaft of the servo motor 30 and fits with the top of the annular material leveling cover 20;

[0041] When the magnetic coupling drive assembly 24 works, the servo motor 30 drives the roller 31 to rotate. The roller 31 moves on the top of the annular material leveling cover 20, thereby driving the support ring one 27 to rotate. The support ring one 27 drives the electromagnet one 29 to rotate;

[0042] The material pushing assembly 25 is composed of a bracket 32, a support ring two 33, a number of iron blocks one 34, a number of connecting rods 35 and a number of scraping plates 36. The bracket 32 is fixedly connected to the top end inside the annular material leveling cover 20. The support ring two 33 is rotatably connected to the inside of the bracket 32. The iron block one 34 is fixedly connected to the top end of the support ring two 33 and matches with the electromagnet one 29. The connecting rod 35 is fixedly connected to the bottom end of the support ring two 33. The scraping plate 36 is fixedly connected to the bottom end of the connecting rod 35 and fits with the inner side wall of the annular material leveling cover 20. A number of universal ball bearings 37 are rotatably arranged at the bottom end of the support ring two 33. The universal ball bearings 37 fit with the bottom surface inside the bracket 32;

[0043] During the rotation of the electromagnet 29, a magnetic suction force is generated with the iron block 34, thereby driving the rotation of the support ring 33. The support ring 33 drives the connecting rod 35 and the scraper 36 to rotate, and the pushing function of the material is realized through the scraper 36 to achieve uniform feeding.

[0044] The blocking assembly 26 is composed of a cylinder 38 and a blocking plate 39. The cylinder 38 is fixedly connected to the bottom end of the annular material leveling cover 20, and the blocking plate 39 is slidably inserted through the feeding funnel 23 and fixedly connected to one end of the cylinder 38.

[0045] The cylinder 38 drives the movement of the blocking plate 39, and the feeding funnel 23 can be temporarily blocked through the blocking plate 39, so as to achieve uniform feeding for each feeding funnel 23.

[0046] The air supply mechanism 4 is composed of a sealing cover 40, an air filter 41, an induction heating coil 42, a gas guide pipe 43, a small fan 44 and a blowing nozzle 45. The sealing cover 40 is sleeved on the air flow drying and lifting pipe 7 and fixedly connected thereto. The induction heating coil 42 is located inside the sealing cover 40 and sleeved on the air flow drying and lifting pipe 7. The air filter 41 is fixedly connected to the side of the top end of the sealing cover 40. The gas guide pipe 43 is fixedly connected to the side of the bottom end of the sealing cover 40. The small fan 44 is fixedly connected to the top end of the support frame 1 and connected to the gas guide pipe 43. The blowing nozzle 45 is fixedly connected between the small fan 44 and the air flow drying and lifting pipe 7.

[0047] The induction heating coil 42 realizes local heating of the air flow drying and lifting pipe 7, so that a high-temperature state is formed inside the air flow drying and lifting pipe 7. At this time, the small fan 44 is started, and the air filter 41 realizes air intake filtration. The air flow enters the inside of the sealing cover 40 through the air filter 41. At this time, the air flow is preheated under the action of the air flow drying and lifting pipe 7, and the gas guide pipe 43 and the blowing nozzle 45 blow the hot air flow into the air flow drying and lifting pipe 7 to realize air flow drying and air flow lifting.

[0048] The auxiliary blanking mechanism 16 is composed of a plurality of rotating sleeves 46, a plurality of scraping bars 47, a plurality of electromagnets 48, a plurality of iron blocks 49, a bearing 50, a rotating shaft 51 and a centrifugal blanking disc 52. The rotating sleeve 46 is rotatably connected to the middle position of the bottom end of the exhaust hood 8 through the bearing 50 and sleeved on the output shaft of the double-shaft motor 14. The scraping bar 47 is fixedly connected to the side of the rotating sleeve 46 and fits with the outer side of the breathable filter mesh cover 11. The iron block 49 is fixedly connected to the inner side wall of the rotating sleeve 46. The electromagnet 48 is fixedly connected to the output shaft of the double-shaft motor 14 and matches with the iron block 49. The rotating shaft 51 is connected to the bottom end of the output shaft of the double-shaft motor 14. The centrifugal blanking disc 52 is fixedly connected to the bottom end of the rotating shaft 51 and is located inside the blanking diversion cover 13.

[0049] When the biaxial motor 14 works, it drives the electromagnet two 48 to rotate. The electromagnet two 48 drives the iron block two 49 to rotate, thereby driving the rotating sleeve 46 to rotate through the iron block two 49. The rotating sleeve 46 drives the scraping bar 47 to rotate, and the scraping bar 47 is used to scrape the material on the breathable filter mesh cover 11, avoiding the blockage of the breathable filter mesh cover 11. The biaxial motor 14 also drives the rotating shaft 51 and the centrifugal blanking disc 52 to rotate. Through the action of the centrifugal blanking disc 52 and the blanking diversion cover 13, the orderly blanking of the dried neodymium iron boron magnetic powder is realized;

[0050] A prolongation shaft 53 is fixedly arranged at the top end of the rotating shaft 51. The prolongation shaft 53 is slidably inserted through the bottom end of the output shaft of the biaxial motor 14. A spring 54 is fixedly arranged between the rotating shaft 51 and the output shaft of the biaxial motor 14;

[0051] When there is less neodymium iron boron magnetic powder between the centrifugal blanking disc 52 and the blanking diversion cover 13, the spring 54 drives the centrifugal blanking disc 52 to lift, so that the centrifugal blanking disc 52 is in contact with the blanking diversion cover 13, realizing the interception of the neodymium iron boron magnetic powder. The neodymium iron boron magnetic powder can assist in blocking the central blanking pipe 12, avoiding the entry of air flow into the interior of the central blanking pipe 12. When there is more neodymium iron boron magnetic powder between the centrifugal blanking disc 52 and the blanking diversion cover 13, under the action of the gravity of the neodymium iron boron magnetic powder, the prolongation shaft 53 moves downward, and the centrifugal blanking disc 52 is separated from the blanking diversion cover 13, and blanking continues.

[0052] During work, by setting up a drying hood composed of several air-flow drying risers, exhaust hoods, central support disks, several jibs, breathable filter meshes, central feed pipes, and feed guiding covers, as well as a double-shaft motor, axial-flow fans, a neodymium iron boron magnetic powder feeding mechanism, a gas supply mechanism, and a screw discharger, continuous drying treatment of neodymium iron boron magnetic powder can be achieved. During the drying process, the diffusion of neodymium iron boron magnetic powder into the external air can be avoided, realizing dust-free drying. Through the air-lifting drying design, the uniformity and sufficiency of drying can be effectively improved; by setting up a neodymium iron boron magnetic powder feeding mechanism composed of an annular material leveling hood, a screw feeder, a feeding hopper, several feeding funnels, a magnetic coupling drive assembly, a material pushing assembly, and a plugging assembly, continuous and uniform feeding of neodymium iron boron magnetic powder can be achieved, enabling the neodymium iron boron magnetic powder to uniformly enter the interiors of multiple air-flow drying risers, thereby realizing the drying operation; by setting up a gas supply mechanism composed of a sealing hood, an air filter, an induction heating coil, a gas pipe, a small fan, and a blowing nozzle, local heating of the air-flow drying risers can be achieved, and at the same time, hot air can be sent into the interiors of the air-flow drying risers. The high temperature inside the air-flow drying risers and the hot air are used to drive the neodymium iron boron magnetic powder to tumble. When the neodymium iron boron magnetic powder is in a dry state, its weight becomes lighter, so that the neodymium iron boron magnetic powder can be blown upward by the lifting force of the air. The neodymium iron boron magnetic powder and the wet air form a diversion effect at the exhaust hood position, and the neodymium iron boron magnetic powder and the wet air are discharged separately; by setting up an auxiliary feeding mechanism composed of several rotating sleeves, several scraping bars, several electromagnets II, several iron blocks II, bearings II, a rotating shaft, and a centrifugal feed disk, quantitative feeding of the dried neodymium iron boron magnetic powder can be achieved. During the feeding process, the central feed pipe can be kept in a closed state to avoid the neodymium iron boron magnetic powder inside the central feed pipe being affected by the air flow. The closed state of the central feed pipe can also assist in diverting the neodymium iron boron magnetic powder and the wet air.

Claims

1. A neodymium iron boron magnetic powder drying device, comprising a support frame (1), characterized in that: At the middle position of the top end of the support frame (1), a drying hood (2) is fixedly arranged. At the side of the top end of the support frame (1), a neodymium iron boron magnetic powder feeding mechanism (3) connected to the drying hood (2) is arranged. At the side of the drying hood (2), a plurality of air supply mechanisms (4) are fixedly arranged. At the bottom end of the drying hood (2), a screw discharge machine (5) is fixedly arranged. At one side of the top end of the support frame (1), a controller (6) is fixedly arranged; The drying hood (2) is composed of a plurality of air flow drying and lifting pipes (7), an exhaust hood (8), a central support disk (9), a plurality of suspension arms (10), a breathable filter mesh hood (11), a central blanking pipe (12) and a blanking diversion hood (13). The central blanking pipe (12) is fixedly connected to the support frame (1). The bottom end of the central blanking pipe (12) is connected to the screw discharge machine (5). The exhaust hood (8) is fixedly connected to the middle position of the top end of the central blanking pipe (12). The air flow drying and lifting pipes (7) are fixedly connected to the bottom end of the side of the exhaust hood (8). The central support disk (9) is fixedly connected to the middle position of the bottom end of the exhaust hood (8) through the suspension arms (10). The breathable filter mesh hood (11) is connected between the central support disk (9) and the exhaust hood (8). The blanking diversion hood (13) is fixedly connected to the top end inside the central blanking pipe (12). The air flow drying and lifting pipes (7) are connected to the neodymium iron boron magnetic powder feeding mechanism (3) and the air supply mechanism (4). At the middle position of the top end of the central support disk (9), a double-shaft motor (14) is fixedly arranged. At the middle position inside the exhaust hood (8), an axial flow fan (15) fixedly connected to the output shaft of the double-shaft motor (14) is arranged. At the top end inside the central blanking pipe (12), an auxiliary blanking mechanism (16) connected to the double-shaft motor (14) is arranged.

2. The neodymium iron boron magnetic powder drying device according to claim 1, characterized in that: At the middle position of the bottom end of the air flow drying and lifting pipe (7), an air inlet (17) connected to the air supply mechanism (4) is opened. At the bottom end of the side of the air flow drying and lifting pipe (7), a feeding port (18) connected to the neodymium iron boron magnetic powder feeding mechanism (3) is opened. At the bottom end of the central blanking pipe (12), a discharging port (19) connected to the screw discharge machine (5) is opened.

3. The neodymium iron boron magnetic powder drying device according to claim 1, characterized in that: The neodymium iron boron magnetic powder feeding mechanism (3) is composed of an annular material leveling hood (20), a screw feeder (21), a feeding hopper (22), a plurality of feeding funnels (23), a magnetic coupling driving assembly (24), a material pushing assembly (25) and a plugging assembly (26). The annular material leveling hood (20) is sleeved on the air flow drying and lifting pipe (7) and fixedly connected to it. The screw feeder (21) is fixedly connected to one side of the annular material leveling hood (20). The feeding hopper (22) is fixedly connected to the top end of the screw feeder (21). The magnetic coupling driving assembly (24) is sleeved on the air flow drying and lifting pipe (7) and rotatably connected to it. The material pushing assembly (25) is rotatably connected to the inside of the annular material leveling hood (20). The feeding funnel (23) is fixedly connected between the annular material leveling hood (20) and the air flow drying and lifting pipe (7). The plugging assembly (26) is connected between the feeding funnel (23) and the annular material leveling hood (20).

4. A neodymium iron boron magnetic powder drying device according to claim 3, characterized in that: The magnetic coupling drive assembly (24) is composed of a first support ring (27), a first bearing (28), a number of first electromagnets (29), a servo motor (30) and a roller (31). The first support ring (27) is connected to the air flow drying and lifting pipe (7) through the first bearing (28). The first electromagnets (29) are fixedly connected to the bottom end inside the first support ring (27). The servo motor (30) is fixedly connected to one side of the first support ring (27). The roller (31) is fixedly connected to the output shaft of the servo motor (30) and fits against the top of the annular material distributing cover (20).

5. A neodymium iron boron magnetic powder drying device according to claim 4, characterized in that: The material pushing assembly (25) is composed of a bracket (32), a second support ring (33), a number of first iron blocks (34), a number of connecting rods (35) and a number of scraping plates (36). The bracket (32) is fixedly connected to the top end inside the annular material distributing cover (20). The second support ring (33) is rotatably connected inside the bracket (32). The first iron blocks (34) are fixedly connected to the top end of the second support ring (33) and are matched with the first electromagnets (29). The connecting rods (35) are fixedly connected to the bottom end of the second support ring (33). The scraping plates (36) are fixedly connected to the bottom ends of the connecting rods (35) and fit against the inner side wall of the annular material distributing cover (20).

6. The neodymium iron boron magnetic powder drying device according to claim 5, wherein: A number of universal ball bearings (37) are rotatably arranged at the bottom end of the second support ring (33), and the universal ball bearings (37) fit against the bottom surface inside the bracket (32).

7. A neodymium iron boron magnetic powder drying device according to claim 3, characterized in that: The blocking assembly (26) is composed of a cylinder (38) and a blocking plate (39). The cylinder (38) is fixedly connected to the bottom end of the annular material distributing cover (20). The blocking plate (39) is slidably inserted through the feeding funnel (23) and is fixedly connected to one end of the cylinder (38).

8. A neodymium iron boron magnetic powder drying device according to claim 1, characterized in that: The air supply mechanism (4) is composed of a sealing cover (40), an air filter (41), an induction heating coil (42), an air duct (43), a small blower (44) and a blowing nozzle (45). The sealing cover (40) is sleeved on the air flow drying and lifting pipe (7) and is fixedly connected thereto. The induction heating coil (42) is located inside the sealing cover (40) and is sleeved on the air flow drying and lifting pipe (7). The air filter (41) is fixedly connected to the side of the top end of the sealing cover (40). The air duct (43) is fixedly connected to the side of the bottom end of the sealing cover (40). The small blower (44) is fixedly connected to the top end of the support frame (1) and is connected to the air duct (43). The blowing nozzle (45) is fixedly connected between the small blower (44) and the air flow drying and lifting pipe (7).

9. The neodymium iron boron magnetic powder drying device according to claim 1, characterized in that: The auxiliary blanking mechanism (16) is composed of a number of rotating sleeves (46), a number of scraping bars (47), a number of electromagnets II (48), a number of iron blocks II (49), a bearing II (50), a rotating shaft (51) and a centrifugal blanking disc (52). The rotating sleeve (46) is rotatably connected to the middle position at the bottom end of the exhaust hood (8) through the bearing II (50) and sleeved on the output shaft of the double-shaft motor (14). The scraping bar (47) is fixedly connected to the side of the rotating sleeve (46) and fits with the outer side surface of the breathable filter mesh hood (11). The iron block II (49) is fixedly connected to the inner side wall of the rotating sleeve (46). The electromagnet II (48) is fixedly connected to the output shaft of the double-shaft motor (14) and matches with the iron block II (49). The rotating shaft (51) is connected to the bottom end of the output shaft of the double-shaft motor (14). The centrifugal blanking disc (52) is fixedly connected to the bottom end of the rotating shaft (51) and is located inside the blanking diversion hood (13).

10. A neodymium iron boron magnetic powder drying device according to claim 9, characterized in that: A prolonging shaft (53) is fixedly arranged at the top end of the rotating shaft (51). The prolonging shaft (53) is slidably inserted through the bottom end of the output shaft of the double-shaft motor (14). A spring (54) is fixedly arranged between the rotating shaft (51) and the output shaft of the double-shaft motor (14).

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