Screening device and method for aluminum powder production

Abstract

The invention relates to the technical field of screening, and provides a screening device for aluminum powder production, which comprises a tank body, a multi-stage screen tray module, a lining shell, a magnetic suspension vibration exciter, a driving system, a rotating cover, a radial discharging pipe, an axial discharging pipe and a feeding pipe, the multi-stage screen tray module comprises a central pipe body, screen trays and a partition plate, and the screen trays are fixedly arranged on the surface of the central pipe body; the partition plate is fixedly arranged on the surface of the sieve tray, a first discharging port is formed in the surface of the lining shell, the driving system comprises a rotating module, a lifting module and a transmission pipe, the rotating module and the lifting module are used for controlling the transmission pipe to rotate and ascend and descend correspondingly, a second discharging port is formed in the surface of the rotating cover, and a sleeve is fixedly arranged above the rotating cover; the central pipe body and the sleeve are both movably arranged on the surface of the transmission pipe in a sleeving mode, the partition plate is in sliding contact with the inner wall of the rotating cover, efficient and residue-free aluminum powder and full-automatic classified screening and collecting functions are achieved, and the automatic classified screening and collecting device has the advantages of being ingenious in structural matching and capable of automatically classifying and collecting materials.

Description

Technical Field

[0001] The present invention relates to the field of screening technology, and in particular to a screening device and method for aluminum powder production. Background Art

[0002] In industrial production, aluminum powder is widely used in the automotive, aerospace, electronics and other fields. However, during the production process of aluminum powder (or in recycled aluminum powder), it is inevitable that particles of different sizes, as well as some adhered dust and other impurities will appear. These impurities can easily affect the purity, quality and use effect of the aluminum powder, so the aluminum powder needs to be removed and screened.

[0003] After searching, announcement number CN115156036B discloses a pneumatic vibration powder screening device; it includes a conical hopper and a screen assembly, the conical hopper is connected to a fixed ring, the upper surface of the fixed ring is provided with a first silicone pad, the screen assembly includes a screen ring, the outer surface of the screen ring is covered with a second silicone pad, a cross-shaped screen frame is connected to the screen ring, the upper surface of the cross-shaped screen frame is provided with a screen, a first pneumatic vibrator is installed at the center of the lower surface of the cross-shaped screen frame, and a second pneumatic vibrator is provided on the outer surface of the conical hopper, the upper end of the conical hopper is connected to a hopper cover, one side of the hopper cover is connected to a feeding device extending above the screen, and a rotary material dipping mechanism acting on the upper surface of the screen is rotatably connected in the hopper cover; while improving the material screening efficiency, it also effectively reduces the noise during the vibration of the screen, and the blocked screen can be quickly dredged by the action of high-pressure gas, and its use effect is excellent.

[0004] Existing powder screening devices also have the following defects: (1) The discharge port needs to be sealed during screening to prevent leakage or residue, and the corresponding outlet needs to be opened accurately during discharge, which is complicated to operate and prone to residue; (2) The material (especially sticky powder) on the multi-stage sieve plate / screen is difficult to be discharged completely and quickly by gravity or simple vibration, and residue is prone to occur. Summary of the Invention

[0005] The purpose of the present invention is to provide a screening device and method for aluminum powder production. Through a unique rotating cover and sealing linkage mechanism combined with centrifugal force and air curtain collaborative system, automatic, thorough and graded collection of materials of different particle sizes on multi-stage sieve plates is achieved, solving the key defect of the prior art that materials on the surface of multi-stage sieve plates cannot be automatically discharged separately.

[0006] To achieve the above object, the present invention provides the following technical solution: a screening device for aluminum powder production, comprising a tank body, an axial discharge pipe, and a feed pipe, wherein the feed pipe is fixedly arranged above the tank body, and the axial discharge pipe is fixedly arranged below the tank body, and further comprising: A multi-stage sieve tray module, comprising a central tube body, sieve trays and partitions, wherein a plurality of sieve trays are fixedly arranged on the surface of the central tube body, and the partitions are fixedly arranged on the surface of the sieve trays; An inner liner shell is fixedly arranged in the tank body, and a first discharge port of an annular array is arranged on the surface of the inner liner shell; A magnetic levitation exciter is fixedly arranged on the bottom of the liner shell, and the bottom of the central tube is fixedly connected to the magnetic levitation exciter; A drive system comprising a rotation module, a lifting module and a transmission tube, wherein the rotation module and the lifting module are used to control the transmission tube to rotate and lift respectively; A rotating cover is rotatably arranged on the inner side of the inner lining shell of the rotating cover, the surface of the rotating cover is provided with a second discharge port in an annular array, a sleeve is fixedly provided above the rotating cover, the central tube body and the sleeve are movably sleeved on the surface of the transmission tube, and the partition is in sliding contact with the inner wall of the rotating cover; An annular groove is provided inside the tank body, and the annular groove and the position of the inner liner shell surface corresponding to the first discharge port form a sealed cavity, and a guide ring is provided between the outer side of the first discharge port and the annular groove; A plurality of radial discharge pipes are fixedly arranged on the surface of the tank body, the sealed cavity is communicated with the radial discharge pipes, and the radial discharge pipes are connected to the vacuum adsorption equipment.

[0007] A screening method for aluminum powder production, comprising: S100, the rotating module uses the transmission tube and the central tube body to control the sieve plate to move at a uniform speed. When the feed pipe falls from the eccentric position, it can ensure that the material is evenly distributed on the surface of the sieve plate; S200, magnetic levitation exciter controls the multi-stage sieve disc to vibrate and screen at a certain frequency through the central tube. The aluminum powder with the smallest particle size is directly discharged from the tank through the axial discharge pipe, while the aluminum powder with larger particle size is distributed on the surface of different sieve discs distributed in the axial direction. S300, using the lifting module to control the transmission pipe to rise, and the rotating module using the transmission pipe and the sleeve to control the rotating cover to rotate 60 degrees, so as to align the second discharge port with the first discharge port; S400, using the lifting module to control the reset, the rotating module uses the transmission tube and the central tube body to control the sieve plate to perform high-frequency rotational centrifugal motion, and the interaction between the centrifugal force and the partition plate is used to throw the larger particle size aluminum powder distributed on the surface of the sieve plate into the sealed chamber through the second discharge port, the first discharge port and the guide ring; S500. After the vacuum adsorption equipment is started, the negative pressure generated drives the aluminum powder with larger particle sizes in the sealed chamber to be collected into the corresponding material containers through different inert gas delivery pipes.

[0008] Beneficial effects of the present invention: The present invention utilizes a discharging mechanism that "cooperates with centrifugal force and partitions" to automatically, efficiently and thoroughly discharge materials on the multi-stage sieve tray, and is supplemented by a "rotating air curtain" system. This not only solves the problem in the prior art that multi-stage sieve tray materials cannot be automatically, thoroughly and graded discharged, but also solves the problem of residual cleaning and screening anti-agglomeration, and realizes the fully automated function of efficient, residue-free, graded screening and collection of aluminum powder, and has the characteristics of ingenious structural coordination and automatic graded collection of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a perspective view of the present invention.

[0010] Figure 2 It is an exploded view of the present invention.

[0011] Figure 3 This is a three-dimensional diagram of a multi-stage sieve tray module according to an embodiment of the present invention.

[0012] Figure 4 This is a planar structural diagram of a multi-stage sieve tray module according to an embodiment of the present invention.

[0013] Figure 5 This is a schematic diagram of the disassembly of the liner shell according to an embodiment of the present invention.

[0014] Figure 6 3D is a perspective view of a drive system according to an embodiment of the present invention.

[0015] Figure 7 This is a three-dimensional diagram of a rotating cover according to an embodiment of the present invention.

[0016] Figure 8 This is the first stereoscopic diagram of the main scheme of the present invention.

[0017] Figure 9 This is the second stereoscopic view of the main solution of the present invention.

[0018] Figure 10 It is a first planar cross-sectional view of the present invention.

[0019] Figure 11 It is a second planar cross-sectional view of the present invention.

[0020] Figure 12 It is a third planar cross-sectional view of the present invention.

[0021] Reference numerals: 1-tank body, 11-annular groove; 2-multi-stage sieve plate module, 21-central tube body, 211-keyway, 212-annular cavity, 213-axial hole, 22-sieve plate, 221-partition plate; 3- liner shell, 31- first discharge port, 32- hidden cavity, 33- sealing part, 331- sealing member, 332- elastic member, 34- guide ring; 4-magnetic levitation exciter, 41-bracket; 5-drive system, 51-rotation module, 52-lifting module, 53-transmission tube, 531-first key bar, 532-second key bar, 533-air hole; 6-rotating cover, 61-sleeve, 62-second discharge port, 63-radial rod; 7- axial discharge pipe, 8- feed pipe, 9- radial discharge pipe, 10- inert gas delivery pipe. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0024] See also Figures 1 to 12 In one embodiment of the present invention, a screening device for aluminum powder production includes a tank body 1, an axial discharge pipe 7, and a feed pipe 8, wherein the feed pipe 8 is fixedly arranged above the tank body 1, and the axial discharge pipe 7 is fixedly arranged below the tank body 1, and further includes: The multi-stage sieve tray module 2 includes a central tube body 21, sieve trays 22 and partitions 221. Several sieve trays 22 are fixedly arranged on the surface of the central tube body 21, and the partitions 221 are fixedly arranged on the surface of the sieve trays 22; An inner liner shell 3 is fixedly arranged in the tank body 1, and a first discharge port 31 in an annular array is provided on the surface of the inner liner shell 3; A magnetic levitation exciter 4 is fixedly arranged at the bottom of the lining shell 3, and the bottom of the central tube 21 is fixedly connected to the magnetic levitation exciter 4; The driving system 5 includes a rotation module 51, a lifting module 52, and a transmission tube 53. The rotation module 51 and the lifting module 52 are used to control the transmission tube 53 to rotate and lift respectively; The rotating cover 6 is rotatably arranged on the inner side of the liner shell 3 of the rotating cover 6. The surface of the rotating cover 6 is provided with a second discharge port 62 in an annular array. A sleeve 61 is fixedly provided above the rotating cover 6. The central tube body 21 and the sleeve 61 are movably sleeved on the surface of the transmission tube 53. The partition 221 is in sliding contact with the inner wall of the rotating cover 6. An annular groove 11 is provided on the inner side of the tank body 1. The annular groove 11 and the position of the surface of the liner shell 3 corresponding to the first discharge port 31 form a sealed cavity. A guide ring 34 is provided between the outer side of the first discharge port 31 and the annular groove 11. Several groups of radial discharge pipes 9 are fixedly arranged on the surface of the tank body 1. The sealed cavity is communicated with the radial discharge pipes 9. The radial discharge pipes 9 are connected to a vacuum adsorption device. When the vacuum adsorption device is started, negative pressure drives the material in the sealed cavity to be collected into corresponding containers through different inert gas conveying pipes 10, thereby realizing the automatic and separate pipeline collection function of materials with different particle sizes (corresponding to different levels of the sieve tray 22).

[0025] See also Figure 4 and Figure 7 Furthermore, the inner walls of the central tube body 21 and the sleeve 61 are both provided with an annular array of key grooves 211, and an annular cavity 212 is provided between the two axially distributed groups of key grooves 211. The surface of the transmission tube 53 is provided with an annular array of second key strips 532. When the topmost second key strip 532 moves into the key groove 211 on the inner wall of the sleeve 61, the bottommost second key strip 532 moves into the annular cavity 212.

[0026] See also Figure 5 、 Figure 10 and Figure 11 Furthermore, a ring array of hidden cavities 32 is provided on the surface of the inner lining shell 3, and a sealing portion 33 is provided in the hidden cavity 32. The sealing portion 33 includes a sealing member 331 and an elastic member 332. The elastic member 332 is connected between the hidden cavity 32 and the sealing member 331, and the sealing member 331 can enter the second discharge port 62. The sealing member 331 is a rubber block, and the rubber block is an arc-shaped block. Inclined surfaces similar to wedge-shaped blocks are provided on both sides of the arc-shaped rubber block. When the rotating cover 6 rotates, the arc-shaped rubber block can be separated from the second discharge port by sliding contact with the inclined surfaces on both sides of the arc-shaped rubber block. The elastic member 332 includes a movable pin and a spring. The spring is sleeved on the surface of the movable pin. The movable pin passes through the hidden cavity 32, and the spring is used to seal the sealing member 331 in the second discharge port 62.

[0027] See also Figure 1 、 Figure 6 and Figure 12 Furthermore, the rotation module 51 includes a driving member and an active tube, both of which are connected to the tank body 1. The driving member is used to control the rotation of the active tube. The transmission tube 53 passes through the active tube. The surface of the transmission tube 53 is provided with a first key bar 531 in an annular array. The inner wall of the active tube is provided with a key groove 211. The first key bar 531 is in sliding contact with the key groove 211. The length of the first key bar 531 is greater than the length of the second key bar 532.

[0028] Furthermore, the lifting module 52 includes a telescopic member and a base plate, the transmission tube 53 is connected to the surface of the base plate, the fixed end of the telescopic member is fixedly connected to the tank body 1, and the base plate is fixedly connected to the movable end of the telescopic member, and the telescopic member is an electric telescopic tube.

[0029] See also Figure 7 Furthermore, a radial rod 63 is fixedly connected between the sleeve 61 and the rotating cover 6.

[0030] See also Figure 5 、 Figure 8 and Figure 9 Furthermore, the magnetic levitation exciter 4 is fixedly connected to a bracket 41, and the bracket 41 includes a radial rod 63 and a fixed ring. The radial rod 63 is fixedly connected between the fixed ring and the inner lining shell 3. Three groups of magnetic levitation exciters 4 are arranged in a ring array on the surface of the fixed ring. The radial rod 63 between the tube and the rotating cover 6 is consistent with the radial rod 63 in the bracket 41.

[0031] In the embodiment of the present invention, during screening, the seal 331 is located in the second discharge port 62 to ensure that there is no residue after vibration screening. After the screening is completed, through the precise cooperation of the lifting module 52 and the rotating module 51, the lifting module 52 lifts the transmission tube 53, so that the key bar is engaged with the key groove 211 and the annular cavity 212 and positioned. This linkage design can not only automatically and physically remove the seal 331, but also accurately align the second discharge port 62 with the first discharge port 31 to prepare for discharge. During the whole process, the sieve plate 22 remains stationary to avoid disturbing the screened material layer. After the discharging mode is turned on, the lifting module 52 is reset, and the rotating module 51 drives the sieve plate 22 to rotate at high speed. The centrifugal force is used to drive the material on the surface of the sieve plate 22 to move radially outward. The partition 221 cooperates with the centrifugal force to guide the material to move in a circular motion. The synergistic effect of the centrifugal force and the partition 221 forcibly and efficiently throws the larger particle size materials distributed on the surface of all levels of the sieve plate 22 into the sealed cavity as a whole through the aligned second discharge port 62, the first discharge port 31 and the guide ring 34, thereby realizing the function of simultaneous and thorough discharge of multi-level materials.

[0032] In another embodiment of the present invention, please refer to Figure 8 and Figure 9 , and also includes an inert gas delivery pipe 10, which is movably connected to the transmission pipe 53. The surface of the transmission pipe 53 is provided with air holes 533. The rotation module 51 drives the rotating cover 6 to rotate 60 degrees. The rotating rotating cover 6 actively pushes the sealing member 331 into the hidden cavity 32 by sliding contact with the sealing member 331.

[0033] See also Figure 3 Furthermore, an axial hole 213 is provided on the surface of the central tube body 21 , and the axial hole 213 can be connected to the air hole 533 .

[0034] In an embodiment of the present invention, inert gas is blown out through the transmission tube 53, air holes 533, and axial hole 213. Since the air holes 533 rotate with the sieve plate 22 / transmission tube 53, a dynamic annular air curtain is formed. During discharge, the rotating air curtain can forcefully sweep residual material from the surfaces of the partition 221, the discharge port, and the guide ring 34 into the sealed chamber, ensuring no residue. During screening, the rotating air curtain disperses falling material, promoting even distribution and preventing powder agglomeration, thereby improving screening efficiency and quality. This dynamic rotating air curtain combines the dual functions of cleaning and assisting screening, simultaneously resolving the problems of residual powder in the discharge channel (second discharge port 62, first discharge port 31, guide ring 34) and on the surface of the partition 221, as well as the problem of material agglomeration during screening.

[0035] A screening method for aluminum powder production, comprising: S100, the rotating module 51 uses the transmission tube 53 and the central tube body 21 to control the sieve plate 22 to move at a uniform speed (low speed), so that when the feed pipe 8 falls from the eccentric position, the material can be evenly distributed on the surface of the sieve plate 22; S200, while the sieve plate 22 is moving at a uniform speed (low speed), the magnetic levitation exciter 4 controls the multi-stage sieve plate 22 to vibrate and screen at a certain frequency through the central tube 21. The aluminum powder with the smallest particle size is directly discharged from the tank body 1 through the axial discharge pipe 7, and the aluminum powder with larger particle size is distributed on the surfaces of different sieve plates 22 distributed axially. At this time, the second discharge port 62 is staggered with the first discharge port 31, and the sealing member 331 is located in the second discharge port 62 to prevent powder from remaining in the second discharge port 62 during the vibration screening process; S300, after the screening is completed, the lifting module 52 is used to control the transmission tube 53 to rise a certain distance, so that the uppermost second key bar 532 moves into the key groove 211 on the inner wall of the sleeve 61, and the lowermost second key bar 532 moves into the annular cavity 212. The rotation module 51 uses the transmission tube 53 and the sleeve 61 to control the rotating cover 6 to rotate 60 degrees. The rotating rotating cover 6 drives the sealing member 331 to move into the hidden cavity 32 by sliding contact with the sealing member 331, so as to control the second discharge port 62 to be aligned with the first discharge port 31. During this process, the sieve plate 22 always remains stationary. S400, use the lifting module 52 to control the reset, and the rotating module 51 uses the transmission tube 53 and the central tube body 21 to control the sieve plate 22 to perform high-speed rotation centrifugal motion. The centrifugal force and the partition 221 (the centrifugal force drives the material to move radially, and the partition 221 drives the material to move in annularly) cooperate with each other to throw the larger particle size aluminum powder distributed on the surface of the sieve plate 22 into the sealed cavity through the second discharge port 62, the first discharge port 31 and the guide ring 34.

[0036] S500, the inert gas delivery pipe 10 is blown out through the transmission pipe 53, the air hole 533 and the axial hole 213. The annular air curtain formed by the rotating air hole 533 is used to clean the materials adhering to the surface of the partition 221 and the residual materials on the second discharge port 62, the first discharge port 31 and the guide ring 34 into the sealed cavity. On the other hand, it can play the role of blowing away the materials and preventing agglomeration during screening. S600 , the negative pressure generated after the vacuum adsorption equipment is started drives the aluminum powder with larger particle sizes in the sealed chamber to be collected into corresponding material containers through different inert gas delivery pipes 10 .

[0037] In summary, the present application utilizes a discharging mechanism that "cooperates with centrifugal force and the partition 221" to automatically, efficiently and thoroughly discharge the material on the multi-stage sieve plate 22, and is supplemented by a "rotating air curtain" system. This not only solves the problem in the prior art that the material on the multi-stage sieve plate 22 cannot be automatically, thoroughly and graded discharged, but also solves the problem of residual cleaning and screening anti-agglomeration, and realizes the fully automated function of efficient, residue-free, graded screening and collection of aluminum powder, and has the characteristics of ingenious structural coordination and automatic graded collection of materials.

[0038] For those skilled in the art, although several embodiments and examples of the present invention have been described, these embodiments and examples are provided as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the invention.

[0039] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A screening device for aluminum powder production, comprising a tank body (1), an axial discharge pipe (7) and a feed pipe (8), wherein the feed pipe (8) is fixedly arranged above the tank body (1), and the axial discharge pipe (7) is fixedly arranged below the tank body (1), characterized in that: Also includes: A multi-stage sieve tray module (2), the multi-stage sieve tray module (2) comprising a central tube body (21), a sieve tray (22) and a partition plate (221), wherein a plurality of the sieve trays (22) are fixedly arranged on the surface of the central tube body (21), and the partition plate (221) is fixedly arranged on the surface of the sieve tray (22); An inner liner shell (3) is fixedly arranged in the tank body (1), and a first discharge port (31) in an annular array is provided on the surface of the inner liner shell (3); A magnetic levitation exciter (4) is fixedly arranged at the bottom of the inner lining shell (3), and the bottom of the central tube (21) is fixedly connected to the magnetic levitation exciter (4); A drive system (5), the drive system (5) comprising a rotation module (51), a lifting module (52) and a transmission tube (53), wherein the rotation module (51) and the lifting module (52) are respectively used to control the transmission tube (53) to perform rotation and lifting motions; A rotating cover (6) is rotatably arranged on the inner side of the inner lining shell (3) of the rotating cover (6), a second discharge port (62) in an annular array is arranged on the surface of the rotating cover (6), a sleeve (61) is fixedly arranged above the rotating cover (6), the central tube (21) and the sleeve (61) are movably sleeved on the surface of the transmission tube (53), and the partition (221) is in sliding contact with the inner wall of the rotating cover (6); An annular groove (11) is provided on the inner side of the tank body (1), the annular groove (11) and a position on the surface of the liner shell (3) corresponding to the first discharge port (31) form a sealed cavity, and a guide ring (34) is provided between the outer side of the first discharge port (31) and the annular groove (11); A plurality of radial discharge pipes (9) are fixedly arranged on the surface of the tank body (1); the sealed cavity is communicated with the radial discharge pipes (9); and the radial discharge pipes (9) are connected to a vacuum adsorption device.

2. A screening device for aluminum powder production according to claim 1, characterized in that: The inner walls of the central tube body (21) and the sleeve (61) are both provided with an annular array of key grooves (211), an annular cavity (212) is provided between the two groups of axially distributed key grooves (211), and the surface of the transmission tube (53) is provided with an annular array of second key strips (532), when the uppermost second key strip (532) moves into the key groove (211) on the inner wall of the sleeve (61), the lowermost second key strip (532) moves into the annular cavity (212).

3. A screening device for aluminum powder production according to claim 2, characterized in that: It also includes an inert gas delivery pipe (10), the inert gas delivery pipe (10) is movably connected to the transmission pipe (53), and the surface of the transmission pipe (53) is provided with air holes (533).

4. A screening device for aluminum powder production according to claim 3, characterized in that: An axial hole (213) is provided on the surface of the central tube body (21), and the axial hole (213) can be communicated with the air hole (533).

5. A screening device for aluminum powder production according to claim 1, characterized in that: The surface of the liner shell (3) is provided with an annular array of hidden cavities (32), a sealing portion (33) is provided in the hidden cavity (32), the sealing portion (33) includes a sealing member (331) and an elastic member (332), the elastic member (332) is connected between the hidden cavity (32) and the sealing member (331), and the sealing member (331) can enter the second discharge port (62).

6. A screening device for aluminum powder production according to claim 2, characterized in that: The rotation module (51) includes a driving member and an active tube, both of which are connected to the tank body (1). The driving member is used to control the rotation of the active tube. The transmission tube (53) passes through the active tube. The surface of the transmission tube (53) is provided with a first key bar (531) in an annular array. The inner wall of the active tube is provided with a key groove (211). The first key bar (531) is in sliding contact with the key groove (211). The length of the first key bar (531) is greater than the length of the second key bar (532).

7. A screening device for aluminum powder production according to claim 6, characterized in that: The lifting module (52) comprises a telescopic member and a base plate, the transmission tube (53) is connected to the surface of the base plate, the fixed end of the telescopic member is fixedly connected to the tank body (1), and the base plate is fixedly connected to the movable end of the telescopic member.

8. A screening device for aluminum powder production according to claim 1, characterized in that: A radial rod (63) is fixedly connected between the sleeve (61) and the rotating cover (6).

9. A screening device for aluminum powder production according to claim 8, characterized in that: The magnetic levitation exciter (4) is fixedly connected to a bracket (41), the bracket (41) includes a radial rod (63) and a fixing ring, the radial rod (63) is fixedly connected between the fixing ring and the inner liner shell (3), and three groups of the magnetic levitation exciters (4) are annularly arrayed on the surface of the fixing ring.

10. A screening method for aluminum powder production, applied to the screening device for aluminum powder production according to any one of claims 1 to 9, characterized in that: include: S100, the rotating module (51) uses the transmission tube (53) and the central tube body (21) to control the sieve plate (22) to move at a uniform speed, and when the feed tube (8) falls from the eccentric position, it can ensure that the material is evenly distributed on the surface of the sieve plate (22); S200, the magnetic suspension exciter (4) controls the multi-stage sieve disc (22) to vibrate and screen at a certain frequency through the central tube (21), and the aluminum powder with the smallest particle size is directly discharged from the tank (1) through the axial discharge pipe (7), while the aluminum powder with larger particle size is distributed on the surface of different sieve discs (22) distributed in the axial direction; S300, using the lifting module (52) to control the transmission tube (53) to rise, and the rotating module (51) using the transmission tube (53) and the sleeve (61) to control the rotating cover (6) to rotate 60 degrees, so as to control the second discharge port (62) to be aligned with the first discharge port (31); S400, using the lifting module (52) to control the reset, the rotating module (51) uses the transmission tube (53) and the central tube body (21) to control the sieve plate (22) to perform high-frequency rotation centrifugal motion, and the interaction between the centrifugal force and the partition (221) is used to throw the aluminum powder with larger particle size distributed on the surface of the sieve plate (22) into the sealed cavity through the second discharge port (62), the first discharge port (31) and the guide ring (34); S500, the negative pressure generated after the vacuum adsorption equipment is started drives the aluminum powder with larger particle size in the sealed cavity to be collected into the corresponding material container through different inert gas conveying pipes (10).

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