A multifunctional neodymium-iron-boron magnetic powder storage device

Abstract

The application belongs to the technical field of Nd-Fe-B magnetic powder storage, and particularly relates to a multifunctional Nd-Fe-B magnetic powder storage device, which comprises a storage tank, a stirring shaft is rotatably arranged in the storage tank, a plurality of stirring blades are fixedly arranged on the surface of the stirring shaft, a plurality of first air holes are arranged in the middle and lower part of the stirring shaft, a sleeve is reversely rotatably arranged on the surface of the stirring shaft, a fixing disc is fixedly arranged at the bottom of the sleeve, two groups of supporting rods are fixedly arranged on the outer side of the fixing disc, a fixing rod is fixedly arranged at the outer end of each supporting rod, a lifting rod is slidably arranged on one side of the fixing rod, and a plurality of downwardly inclined push plates are fixedly arranged on one side of the lifting rod. When the Nd-Fe-B magnetic powder is stirred, bidirectional reciprocating stirring and mixing can be realized, the mixing dead angle of traditional same-direction stirring can be effectively avoided, the magnetic powder can be stirred up and down, impurity gas between the magnetic powders can be fully discharged, inert gas can be better filled into each part in the storage tank, and the storage effect of the magnetic powder is effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of neodymium iron boron magnetic powder storage technology, and particularly relates to a multifunctional neodymium iron boron magnetic powder storage device. Background Technology

[0002] Neodymium iron boron (NdFeB) magnets are made from NdFeB magnet powder. After powder production, they need to be deoxygenated and sealed for storage when not in use. Unlike common magnets, NdFeB magnets are known as the "King of Magnets" due to their superior magnetic properties. NdFeB contains large amounts of the rare earth elements neodymium, iron, and boron. They are hard but brittle. With societal development, especially in technologies such as wind power generation, electric vehicles, and variable frequency engines, the performance requirements for NdFeB magnets are becoming increasingly stringent.

[0003] A storage device for neodymium iron boron magnetic powder, as described in patent application CN201920270743.9, includes a shell, a storage chamber, a feed inlet, a recovery chamber, and a control panel. The recovery chamber is located on one side of the bottom of the shell, and a dust removal chamber is located on the bottom of the shell on the same side as the recovery chamber. A vacuum cleaner is located at the center of the dust removal chamber. The storage chamber is located inside the shell above the dust removal chamber, and a power chamber is located on one side of the top of the storage chamber. A vacuum pump is located at the center of the power chamber. An exhaust port is located on the outer wall of one side of the shell, and a feed inlet is located at the center of the top of the shell. A transparent observation window is located at the center of the shell surface, and a control panel is located on the shell surface above the transparent observation window. This invention not only improves the convenience and environmental friendliness of the storage device but also enhances its storage efficiency.

[0004] Existing technologies improve storage efficiency through the use of filters, dust removal chambers, and vacuum pumps, but still have certain shortcomings in overall use: First, after neodymium iron boron magnetic powder is made, it needs to be deoxygenated and sealed for storage when not in use. Existing technology uses vacuum storage. However, if there is a lack of stirring during vacuum storage, the magnetic powder particles are prone to agglomeration due to electrostatic force or van der Waals force, forming local high-density clumps. This not only affects the dispersibility during subsequent processing, but also leads to a decrease in the consistency of magnetic properties. Secondly, although a vacuum environment can delay initial oxidation, if the material is not stirred or filled with inert gas during long-term storage, the local microenvironment may be corroded by residual oxygen or moisture, causing the magnetic powder to pulverize from the inside. Finally, traditional electric mixers rely on mechanical blade rotation, which only allows horizontal mixing. Because powder tends to accumulate downwards, the lower part of the powder cannot be thoroughly mixed, easily creating dead zones. This results in uneven distribution of the magnetic powder and prevents the inert protective gas from reaching these areas effectively. Summary of the Invention

[0005] This invention, through the design of a stirring shaft, stirring blades, and lifting rod, achieves the technical effect of fully stirring and mixing neodymium iron boron magnetic powder during storage, allowing for the smooth removal of air. This solves the technical problem in existing technologies where the lack of stirring during vacuum storage of neodymium iron boron magnetic powder leads to particle agglomeration due to electrostatic forces, affecting dispersibility and magnetic property consistency. Furthermore, by utilizing a conical column and a second vent, it also solves the technical problem in existing technologies where long-term static storage of neodymium iron boron magnetic powder may cause grain boundary corrosion due to residual oxygen / moisture, resulting in internal pulverization. It also ensures sufficient sieving and dispersion of the magnetic powder during feeding, guaranteeing adequate oxygen expulsion and improving the storage life of the magnetic powder.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional neodymium iron boron magnetic powder storage device, comprising a storage tank, a feed pipe connected to the top of the storage tank, an exhaust pipe connected to the top of the storage tank, a conical bottom of the storage tank connected to a discharge pipe, a stirring shaft rotatably mounted inside the storage tank, multiple stirring blades fixedly mounted on the surface of the stirring shaft, a rotary joint connected to the top of the stirring shaft, a vent pipe connected to the top of the rotary joint, multiple first air holes opened in the lower middle part of the stirring shaft, a sleeve rotatably mounted on the surface of the stirring shaft in the opposite direction, a fixed plate fixedly mounted at the bottom of the sleeve, two sets of support rods fixedly mounted on the outside of the fixed plate, a fixed rod fixedly mounted at the outer end of the support rod, a lifting rod slidably mounted on one side of the fixed rod, and multiple downwardly inclined levers fixedly mounted on one side of the lifting rod.

[0007] Optionally, the stirring blade is inclined, and multiple conical columns are fixedly installed on the upper and lower surfaces of the stirring blade, and multiple second air holes are opened on the lower surface of the stirring blade.

[0008] Optionally, a cone block is fixedly installed at the bottom of the dial.

[0009] Optionally, a trapezoidal groove is provided on one side of the lifting rod, and a slider is slidably installed inside the groove, with the lifting rod fixedly installed on one side of the slider.

[0010] Optionally, a fixing ring is fixedly installed above the lifting rod in the inner cavity of the storage tank. The bottom of the fixing ring is wavy. A connecting rod is fixedly installed on the top of the lifting rod, and one end of the top of the connecting rod slides against the bottom of the fixing ring.

[0011] Optionally, the top of the retaining ring is provided with rounded corners.

[0012] Optionally, a casing is fixedly installed inside the storage tank, the stirring shaft passes through the casing and rotates in engagement with it, a second bevel gear is rotatably installed inside the casing, a first bevel gear that meshes with the top of the second bevel gear is fixedly installed on the inner surface of the casing, the top end of the sleeve passes through the casing and rotates in engagement with it, and a third bevel gear that meshes with the bottom of the second bevel gear is fixedly installed on the inner surface of the sleeve, and the fixed disc is fixedly installed at the bottom end of the sleeve.

[0013] Optionally, a fixing block is fixedly installed on the inner wall of the storage tank, a telescopic rod is fixedly installed on one side of the fixing block, a screen is fixedly installed at the telescopic end of the telescopic rod, a spring sleeved on the outside of the telescopic rod is fixedly installed between the fixing block and the screen, and a push plate that cooperates with the screen is fixedly installed on the surface of the stirring shaft.

[0014] Optionally, a valve is provided at the bottom of the discharge pipe, and a rotary blade is fixedly installed at the bottom of the stirring shaft inside the discharge pipe.

[0015] Optionally, a sealing joint is connected to the top of the feed pipe, and a fan is connected to the top of the exhaust pipe.

[0016] In summary, compared with existing technologies, the beneficial effects of this solution are as follows: (1) The present invention, through the setting of stirring shaft, stirring blade, sleeve, lifting rod and deflector, enables the NdFeB magnetic powder to achieve bidirectional reciprocating stirring and mixing during stirring, which can effectively avoid the mixing dead zone of traditional unidirectional stirring, improve the mixing effect, and in this process, the magnetic powder can also be turned up and down, so that the impurities and gases between the magnetic powder can be fully discharged, while the inert gas can be better filled into all parts of the storage tank, effectively improving the storage effect of the magnetic powder; (2) The present invention, through the setting of stirring blades, conical column and second air hole, can effectively break up magnetic powder agglomerates during magnetic powder stirring, improve the uniformity of mixing, disperse stirring pressure, and dissipate heat during stirring, reduce the risk of frictional heat generation and avoid magnetic powder oxidation. (3) The present invention, through the setting of fixed block, telescopic rod, screen, spring and push plate, can screen the magnetic powder when the magnetic powder is fed, so that the agglomerated magnetic powder can be fully dispersed, and the excess impurities and air inside the agglomerated magnetic powder can be fully dissipated. Furthermore, it can vibrate during the screening process, improve the filtration effect of the magnetic powder, prevent it from clogging the screen, and speed up the feeding speed of the magnetic powder. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a top view of the structure of the present invention; Figure 3 for Figure 2 Schematic diagram of the cross-sectional view at point AA in the diagram; Figure 4 for Figure 3 Enlarged structural diagram at point B in the diagram; Figure 5 for Figure 3 Enlarged structural diagram at point C; Figure 6 This is a schematic diagram of the connection between the fixed rod and the lifting rod of the present invention; Figure 7 for Figure 3 A magnified structural diagram at point D in the diagram; Figure 8 for Figure 3 Enlarged structural diagram at point E in the diagram; Figure 9 for Figure 3 A magnified structural diagram at point F in the diagram; Figure 10 for Figure 1 A magnified structural diagram at point G in the diagram; Figure 11 for Figure 3 A magnified structural diagram of point H in the diagram.

[0018] In the diagram: Storage tank 10; Feed pipe 11; Sealing joint 12; Discharge pipe 13; Valve 14; Support leg 15; Exhaust pipe 16; Fan 17; Motor 18; Stirring shaft 19; Transmission assembly 20; Collar 21; Stirring blade 22; Rotary joint 23; Air guide pipe 24; First air hole 25; Fixing block 26; Telescopic rod 27; Screen 28; Spring 29; Push plate 30; Shell 31; First bevel gear 32; Second bevel gear 33; Sleeve 34; Third bevel gear 35; Fixing plate 36; Support rod 37; Fixing rod 38; Slide groove 39; Slider 40; Lifting rod 41; Paddle plate 42; Connecting rod 43; Fixing ring 44; Rounded corner 45; Conical block 46; Conical column 47; Second air hole 48; Limiting rod 49; Fixing seat 50; Rotary blade 51. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] refer to Figure 1 A multifunctional neodymium iron boron magnetic powder storage device includes a storage tank 10, the bottom of which is cone-shaped, and a support leg 15 is fixedly installed at the bottom of the storage tank 10.

[0021] Further reference Figure 1 and Figure 10The upper surface of the storage tank 10 is connected to a feed pipe 11 for feeding neodymium iron boron magnetic powder. The top end of the feed pipe 11 is connected to a sealing joint 12 for connecting the neodymium iron boron magnetic powder conveying pipe, so that the connection part is sealed to prevent the neodymium iron boron magnetic powder from overflowing and improve the use effect. The conical bottom of the feed pipe 11 is connected to a discharge pipe 13. The conical design of the storage tank 10 makes it easy for the neodymium iron boron magnetic powder to accumulate at the bottom and be discharged. The bottom of the discharge pipe 13 is equipped with a valve 14 for discharging the neodymium iron boron magnetic powder outward.

[0022] Further reference Figure 1 , Figure 2 , Figure 3 and Figure 10 The storage tank 10 is equipped with a rotating stirring shaft 19. The stirring shaft 19 is hollow and has multiple first air holes 25 in its lower middle part. A rotary joint 23 is fixedly installed at the top of the stirring shaft 19. The top of the rotary joint 23 is connected to a gas guide pipe 24. The gas guide pipe 24 is connected to a nitrogen tank. In actual use, the nitrogen tank can be placed according to the actual situation, so it is not shown in this figure. The upper surface of the storage tank 10 is also connected to an exhaust pipe 16. A fan 17 is installed at the top of the exhaust pipe 16. A one-way exhaust valve is installed at the air outlet of the fan 17. Before the NdFeB magnetic powder is fed, the storage tank 10 is first filled with air through the gas guide pipe 24 to expel the air inside the storage tank 10, so as to avoid oxidation reaction, damage to the crystal structure of the magnetic powder, and improve the storage effect of NdFeB magnetic powder.

[0023] Further reference Figure 3 and Figure 8 Multiple collars 21 are fixedly mounted on the lower middle surface of the stirring shaft 19, and multiple stirring blades 22 are fixedly mounted on the outer surface of the collars 21. A motor 18 is fixedly mounted on the back side of the storage tank 10. A transmission assembly 20 is provided between the output end of the motor 18 and the top end of the stirring shaft 19. The transmission assembly 20 includes pulleys fixedly mounted on the output end of the motor 18 and the top end of the stirring shaft 19, and a belt is installed between the two pulleys. When neodymium iron boron magnetic powder is fed, the motor 18 drives the connected stirring shaft 19 to rotate through the transmission assembly 20, thereby driving the collars 21 and the stirring blades 22. The stirring blade 22 rotates to stir the NdFeB magnetic powder. At this time, nitrogen is continuously introduced. By stirring and air jetting simultaneously, nitrogen can be introduced into the gaps between the magnetic powder particles during the tumbling process, achieving uniform mixing. This avoids fluctuations in product performance during subsequent molding or sintering due to local performance differences. It also better removes internal air, preventing oxidation and ensuring that the magnetic force does not decay over time. The stirring blade 22 is tilted, so that the blade generates axial thrust and radial tumbling at the same time, pushing the material to circulate along the stirring axis, avoiding local accumulation and improving the stirring effect.

[0024] Further reference Figure 3and Figure 11 Multiple limiting rods 49 are fixedly installed at the bottom of the inner cavity of the storage tank 10, and a fixed seat 50 is fixedly installed at the top of the limiting rods 49. The stirring shaft 19 rotates inside the fixed seat 50, ensuring the stability of the stirring shaft 19 during stirring of the magnetic powder and guaranteeing the normal operation of the equipment.

[0025] Furthermore, during the stirring of the NdFeB magnetic powder, the blower 17 operates to extract the internal air and nitrogen mixture, thus better removing air. It should be noted that a filter screen is fixedly installed at the bottom of the exhaust pipe 16, which can intercept the dust of the NdFeB magnetic powder, preventing the magnetic powder from being released, thus avoiding environmental pollution and waste.

[0026] Further reference Figure 3 and Figure 4 Multiple conical columns 47 are fixedly installed on the upper and lower surfaces of the stirring blade 22. These conical columns 47 are smooth cones. During the rotation of the stirring blade 22, when they come into contact with the lumpy magnetic powder, they can crush and break it up, improving the uniformity of mixing. Furthermore, the conical shape also has a guiding and dispersing effect. Compared to traditional one-piece stirring blades, this design can distribute the stirring pressure and extend the service life. Simultaneously, the gaps between the conical columns 47 reduce the contact area between the blade and the magnetic powder, lowering the risk of frictional heat generation. The stirring blade 22 is connected to the stirring shaft 19, and multiple second air holes 48 are opened on the lower surface of the stirring blade 22. During use, as the conical columns 47 and the stirring blade 22 crush the agglomerates, nitrogen gas is sprayed to further improve the uniformity of mixing. At the same time, the nitrogen spray accelerates heat dissipation, preventing the magnetic powder from oxidizing.

[0027] Further reference Figure 3 , Figure 7 and Figure 9 A fixing block 26 is fixedly installed on the inner wall of the storage tank 10. A telescopic rod 27 is fixedly installed on one side of the fixing block 26. A screen 28 is fixedly installed at the telescopic end of the telescopic rod 27. The screen 28 is located directly below the feed pipe 11. When neodymium iron boron magnetic powder is fed, the screen 28 can screen it, so that the magnetic powder is dispersed, preventing air from being trapped inside the magnetic powder and thus improving the deoxygenation effect.

[0028] Further reference Figure 7 and Figure 9A spring 29, sleeved on the outside of the telescopic rod 27, is fixedly installed between the fixed block 26 and the screen 28. A push plate 30, which works in conjunction with the screen 28, is fixedly installed on the surface of the stirring shaft 19. When stirring the magnetic powder, the stirring shaft 19 drives the push plate 30 connected to it to rotate. When the push plate 30 rotates to the point where it comes into contact with the screen 28, it squeezes the screen 28 and compresses the spring 29. When the push plate 30 is not in contact with the screen 28, the spring 29 drives the screen 28 to reset and vibrate, so that the screen 28 vibrates and screens the falling magnetic powder, improves the filtration effect of the magnetic powder, avoids clogging the screen 28, and ensures the feeding speed of the magnetic powder.

[0029] Further reference Figure 3 , Figure 4 and Figure 9 The storage tank 10 has a housing 31 fixedly installed inside. A stirring shaft 19 passes through the housing 31 and rotates within it. A second bevel gear 33 is rotatably installed inside the housing 31. A first bevel gear 32, meshing with the top of the second bevel gear 33, is fixedly installed on the inner surface of the housing 31 on the stirring shaft 19. A sleeve 34 is rotatably installed on the surface of the stirring shaft 19. The top of the sleeve 34 passes through the housing 31 and rotates within it. A third bevel gear 35, meshing with the bottom of the second bevel gear 33, is fixedly installed on the inner surface of the sleeve 34 on the sleeve 31. A fixing plate 36 is fixedly installed at the bottom of the sleeve 34. Two sets of support rods 37 are fixedly installed on the outer side of the fixing plate 36. The outer end of the sleeve 34 is fixedly... A fixed rod 38 is fixedly installed, and a slider 40 is set on the surface of the fixed rod 38 between each set of support rods 37. Multiple downwardly inclined paddle plates 42 are fixedly installed on the surface of the slider 40. When the stirring shaft 19 rotates and drives the stirring blade 22 to stir the magnetic powder, it drives the first bevel gear 32 connected to it. The rotation of the first bevel gear 32 drives the second bevel gear 33, thereby driving the third bevel gear 35 connected to it to rotate in the opposite direction of the first bevel gear 32. This drives the sleeve 34 to rotate, and drives the lifting rod 41 and the paddle plates 42 to rotate in the opposite direction of the stirring blade 22. This can effectively avoid the mixing dead zone of traditional unidirectional stirring, improve the mixing effect, and facilitate the dissipation of air inside the magnetic powder.

[0030] Further reference Figure 3 , Figure 5 and Figure 6A trapezoidal fixed rod 38 is provided on one side of the fixed rod 38. A slider 40 is slidably installed inside the fixed rod 38. A lifting rod 41 is fixedly installed on one side of the slider 40. The lifting rod 41 slides inside the slide groove 39 through the slider 40. The slide groove 39 and the slider 40 are trapezoidal, so that the lifting rod 41 can be stably engaged inside the fixed rod 38 and slide in a sliding fit. A fixing ring 44 is fixedly installed in the inner cavity of the storage tank 10 above the lifting rod 41. The bottom of the fixing ring 44 is wavy. A connecting rod 43 is fixedly mounted on the top of 41. The connecting rod 43 slides on the lower surface of the fixed ring 44 and rotates in cooperation with it. When the lifting rod 41 rotates, the lifting rod 41 drives the connecting rod 43 to rotate at the bottom of the fixed ring 44. Since the bottom of the fixed ring 44 is wavy, the lifting rod 41 pulls the dial plate 42 to slide up and down on the surface of the fixed rod 38. This causes the dial plate 42 to move up and down while rotating. While stirring the magnetic powder, it can turn the magnetic powder up and down, which can significantly improve the mixing effect and fully remove air.

[0031] Further reference Figure 5 The top of the retaining ring 44 is provided with a rounded corner 45, which facilitates the falling of magnetic powder and prevents it from accumulating on the top of the retaining ring 44.

[0032] Further reference Figure 4 The bottom of the multiple paddles 42 is fixedly equipped with a cone-shaped block 46. When the powder is flipped up and down, the cone-shaped block 46 can quickly insert into the powder below, making it easier for the paddles 42 to flip the powder up and down and improving the effect of use.

[0033] Further reference Figure 3 and Figure 11 The bottom of the stirring shaft 19 is fixedly installed with a rotary blade 51 inside the discharge pipe 13. When the magnetic powder is stirred, the magnetic powder inside the discharge pipe 13 can be lifted upward to avoid the magnetic powder inside not being stirred and the existence of mixing dead corners, thereby improving the stirring effect. At the same time, when the magnetic powder is fed, the rotary blade 51 can increase the feeding speed.

[0034] Finally, it should be noted that the connection and fixing of each part of the multifunctional neodymium iron boron magnetic powder storage device of the present invention can be achieved by conventional mechanical connection structure, and the control system and connection method required between multiple electrical components and driving components can also be achieved by conventional means and can be equipped with corresponding sensors and detectors. As long as the beneficial effect or the specific actions in the above-mentioned work can be achieved, it can be implemented.

[0035] The fan 17 and motor 18 of the multifunctional neodymium iron boron magnetic powder storage device in this invention are all purchased from the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0036] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0037] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0038] The foregoing description presents and describes several preferred embodiments of this application. However, as mentioned above, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A multifunctional neodymium iron boron magnetic powder storage device, comprising a storage tank (10), wherein the top of the storage tank (10) is connected to a feed pipe (11), the top of the storage tank (10) is also connected to an exhaust pipe (16), and the bottom of the storage tank (10) is conical and connected to a discharge pipe (13), characterized in that, The storage tank (10) is equipped with a rotating stirring shaft (19) inside. Multiple stirring blades (22) are fixedly installed on the surface of the stirring shaft (19). A rotary joint (23) is connected to the top of the stirring shaft (19). A gas guide pipe (24) is connected to the top of the rotary joint (23). Multiple first air holes (25) are opened in the middle and lower part of the stirring shaft (19). A sleeve (34) is installed on the surface of the stirring shaft (19) in the opposite direction. A fixed plate (36) is fixedly installed at the bottom of the sleeve (34). Two sets of support rods (37) are fixedly installed on the outside of the fixed plate (36). A fixed rod (38) is fixedly installed at the outer end of the support rod (37). A lifting rod (41) is slidably installed on one side of the fixed rod (38). Multiple downwardly inclined levers (42) are fixedly installed on one side of the lifting rod (41).

2. The multifunctional neodymium iron boron magnetic powder storage device according to claim 1, characterized in that, The stirring blade (22) is inclined, and multiple conical columns (47) are fixedly installed on the upper and lower surfaces of the stirring blade (22). Multiple second air holes (48) are opened on the lower surface of the stirring blade (22).

3. The multifunctional neodymium iron boron magnetic powder storage device according to claim 1, characterized in that, A cone block (46) is fixedly installed at the bottom of the dial plate (42).

4. The multifunctional neodymium iron boron magnetic powder storage device according to claim 1, characterized in that, A trapezoidal groove (39) is provided on one side of the lifting rod (41), and a slider (40) is slidably installed inside the groove (39). The lifting rod (41) is fixedly installed on one side of the slider (40).

5. A multifunctional neodymium iron boron magnetic powder storage device according to claim 1, characterized in that, A fixing ring (44) is fixedly installed above the lifting rod (41) in the inner cavity of the storage tank (10). The bottom of the fixing ring (44) is wavy. A connecting rod (43) is fixedly installed on the top of the lifting rod (41). One end of the top of the connecting rod (43) slides against the bottom of the fixing ring (44).

6. A multifunctional neodymium iron boron magnetic powder storage device according to claim 5, characterized in that, The top of the fixing ring (44) is provided with a rounded corner (45).

7. A multifunctional neodymium iron boron magnetic powder storage device according to claim 1, characterized in that, The storage tank (10) is fixedly installed with a casing (31). The stirring shaft (19) passes through the casing (31) and rotates. The casing (31) is rotatably installed with a second bevel gear (33). The stirring shaft (19) is fixedly installed with a first bevel gear (32) that meshes with the top of the second bevel gear (33) on the inner surface of the casing (31). The top of the sleeve (34) passes through the casing (31) and rotates. The sleeve (34) is fixedly installed with a third bevel gear (35) that meshes with the bottom of the second bevel gear (33) on the inner surface of the casing (31). The fixed plate (36) is fixedly installed at the bottom end of the sleeve (34).

8. A multifunctional neodymium iron boron magnetic powder storage device according to claim 7, characterized in that, A fixing block (26) is fixedly installed on the inner wall of the storage tank (10). A telescopic rod (27) is fixedly installed on one side of the fixing block (26). A screen (28) is fixedly installed at the telescopic end of the telescopic rod (27). A spring (29) sleeved on the outside of the telescopic rod (27) is fixedly installed between the fixing block (26) and the screen (28). A push plate (30) that works with the screen (28) is fixedly installed on the surface of the stirring shaft (19).

9. A multifunctional neodymium iron boron magnetic powder storage device according to claim 1, characterized in that, A valve (14) is provided at the bottom of the discharge pipe (13), and a swivel blade (51) is fixedly installed at the bottom of the stirring shaft (19) inside the discharge pipe (13).

10. A multifunctional neodymium iron boron magnetic powder storage device according to claim 1, characterized in that, The top end of the feed pipe (11) is connected to a sealing joint (12), and the top end of the exhaust pipe (16) is connected to a fan (17).

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