Multi-stage screening device for aluminum paste production

Abstract

The invention relates to the technical field of screening, in particular to a multi-stage screening device for aluminum paste production. According to the technical scheme, the device comprises a screening barrel and the like; the supporting frame is arranged on the screening barrel, the material containing barrel is installed on the supporting frame, the suction mechanism is arranged at the bottom of the material containing barrel, the first-stage screen, the second-stage screen and the third-stage screen are arranged in the screening barrel at intervals, and the vibration mechanism is arranged on the first-stage screen, the second-stage screen and the third-stage screen. The vibration mechanism is arranged in the center of the first-stage screen, the second-stage screen and the third-stage screen, and the first-stage screen is used for intercepting large-particle impurities. When the elastic cross-shaped pad is adsorbed and opened towards the periphery through adsorption force, aluminum paste is sucked into the piston cylinder through the adsorption force, the aluminum paste can flow and be mixed rapidly through the adsorption force when the aluminum paste in the containing barrel is sucked, and then impurities of the aluminum paste can be prevented from precipitating at the bottom of the containing barrel.

Description

Technical Field

[0001] The present invention relates to the field of screening technology, in particular to a multi-stage screening device for aluminum slurry production. Background Art

[0002] Aluminum paste is widely used in automotive paint, motorcycle paint, bicycle paint, plastic paint, architectural coatings, inks, mobile phone casings and buttons, electromechanical casings, metallic paint, and many other fields. Aluminum paste is divided into water-based aluminum paste and solvent-based aluminum paste according to the solvent type. With the development of society and people's increasing demands for environmental protection, water-based aluminum paste will be the development trend of this industry.

[0003] The existing aluminum-silver paste is only separated by a single screen during the screening process, making it difficult to control the ratio of aluminum powder of different particle sizes. In addition, the aluminum-silver paste is not fully mixed during screening, causing impurities in the aluminum-silver paste to precipitate or accumulate on the screen, thereby causing the screen to be blocked and affecting the screening efficiency. Summary of the Invention

[0004] In order to overcome the shortcomings of difficulty in controlling the screening ratio of aluminum powders of different particle sizes and precipitation or accumulation of impurities in the aluminum-silver paste on the screen, the present invention provides a multi-stage screening device for aluminum powder paste production.

[0005] The technical solution is: a multi-stage screening device for aluminum powder slurry production, including a screening drum, a support frame and a material bucket, the support frame is arranged on the screening drum, and the material bucket is installed on the support frame, and also includes a suction mechanism, a first-level screen, a second-level screen, a third-level screen and a vibration mechanism, the suction mechanism is arranged at the bottom of the material bucket, the first-level screen, the second-level screen and the third-level screen are respectively arranged in the screening drum in an interval manner, the vibration mechanism is arranged at the center of the first-level screen, the second-level screen and the third-level screen, the first-level screen is used to intercept large particles of impurities, the second-level screen is used to separate aluminum powder particles that do not meet the particle size requirements, and the third-level screen is used to remove tiny impurities.

[0006] Furthermore, the suction mechanism includes a piston cylinder, a discharge barrel, a piston rod, a piston pad and a porous disc. The piston cylinder is circumferentially distributed at the bottom of the material barrel, the discharge barrel is fixedly connected to the bottom of the piston cylinder in a communicating manner, the piston rod slides in the piston cylinder, the piston pad is arranged at one end of the piston rod and is located in the piston cylinder, the piston pad is sealed and slidably connected to the piston cylinder, and the porous disc is arranged at one end of the piston cylinder.

[0007] Furthermore, the suction mechanism also includes an elastic cross pad, which is circumferentially distributed on the porous disc. When the elastic cross pad is subjected to pressure, it opens to the surroundings in a petal shape.

[0008] Furthermore, the suction mechanism also includes a fixed block, a rotating column, a reciprocating track and a fixed ring. The fixed block is arranged at one end of the piston rod, the rotating column is rotatably connected to the fixed block, the reciprocating track is arranged on the rotating column and rotates and slides with the rotating column, and the fixed ring is arranged on the reciprocating track and is located in the screening cylinder.

[0009] Furthermore, the vibration mechanism includes rubber ring 1, rubber ring 2 and rubber ring 3, which are respectively arranged in the screening cylinder at intervals, and rubber ring 1, rubber ring 2 and rubber ring 3 are connected to the first-level screen, the second-level screen and the third-level screen, and rubber ring 1, rubber ring 2 and rubber ring 3 have a certain elasticity.

[0010] Furthermore, the vibration mechanism also includes circular rings, which are respectively arranged at the center positions of the first-level screen, the second-level screen and the third-level screen. A vibration track is opened in the circular ring, and the vibration track is wavy.

[0011] Furthermore, it includes a motor, a rotating shaft and a rotating shaft. The motor is installed at the bottom of the material barrel. The rotating shaft is connected to the motor output shaft. The rotating shaft passes through the ring and is slidably connected. The rotating shaft is rotatably connected to the rotating shaft, and the rotating shaft cooperates with the vibration track.

[0012] Furthermore, it includes a stirring frame and a rotating ring. The stirring frame is circumferentially distributed on the rotating shaft, and the rotating ring is fixedly arranged on the stirring frame. The rotating ring is fixedly connected to the fixed ring.

[0013] Furthermore, it includes a spline shaft, a rectangular frame, a roller, a conveyor belt, a rubber wheel and a brush. A spline groove is opened on the rotating shaft, the spline shaft is slidably set in the spline groove, the rectangular frame is fixed to the spline shaft, the roller is mirror-rotated in the rectangular frame, the conveyor belt is wrapped around the roller, the rubber wheel is rotatably set on the roller, the rubber wheel is in contact with the screening drum, and the brush is set on one side of the rectangular frame.

[0014] Furthermore, it includes discharging rack 1, discharging rack 2 and discharging rack 3, and a plurality of rectangular openings are opened on the screening cylinder. Discharging rack 1, discharging rack 2 and discharging rack 3 are respectively installed in the rectangular openings of the screening cylinder. Discharging rack 1, discharging rack 2 and discharging rack 3 correspond to the first-level screen, the second-level screen and the third-level screen respectively.

[0015] The present invention has the following advantages: 1. When the adsorption force expands the elastic cross pad in all directions, the aluminum slurry is sucked into the piston cylinder by the adsorption force. When the aluminum slurry in the material barrel is sucked, the adsorption force can make the aluminum slurry flow and mix quickly, thereby preventing the impurities in the aluminum slurry from settling at the bottom of the material barrel.

[0016] 2. When the piston pad is driven to slide by the piston rod, air pressure will be generated on the inner wall of the piston cylinder, and the air pressure in the piston cylinder will push the elastic cross pad, causing the elastic cross pad to open to the surroundings in the shape of petals, thereby blowing the aluminum slurry through the gas pressure, and then the aluminum slurry can be further flowed and mixed in the material barrel, which can prevent the impurities in the aluminum slurry from settling at the bottom of the material barrel. The aluminum slurry is evenly mixed in the material barrel through the adsorption force and air pressure, and the problem of precipitation or accumulation of impurities in the aluminum slurry is prevented, thereby effectively improving the subsequent screening effect, and preventing large particles of impurities in the aluminum slurry from accumulating on the primary screen, affecting the screening effect of the aluminum slurry.

[0017] 3. By setting the first-level screen to intercept large particles of impurities, the second-level screen to intercept aluminum powder particles that do not meet the particle size requirements, and the third-level screen to intercept tiny impurities, the first-level screen, the second-level screen and the third-level screen can achieve the effect of screening different impurities.

[0018] 4. The conveyor belt can be used to transport large particles of impurities, aluminum powder particles that do not meet the particle size requirements and tiny impurities away from the primary screen, secondary screen and tertiary screen, and can effectively ensure the screening effect of the primary screen, secondary screen and tertiary screen, as well as the function of cleaning the primary screen, secondary screen and tertiary screen to prevent blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a cross-sectional view of the overall structure of the present invention.

[0021] Figure 3 Schematic diagram of the suction mechanism of the present invention.

[0022] Figure 4 It is a cross-sectional view of the suction mechanism of the present invention.

[0023] Figure 5 It is a schematic diagram of the screening structure of the present invention.

[0024] Figure 6 Schematic diagram of the vibration mechanism of the present invention.

[0025] Figure 7 It is a structural schematic diagram of the conveyor belt of the present invention.

[0026] Figure 8 It is a structural schematic diagram of the brush of the present invention.

[0027] Figure numbers: 1: Screening cylinder, 11: Discharging rack 1, 12: Discharging rack 2, 13: Discharging rack 3, 14: Support frame, 2: Material holding barrel, 21: Piston cylinder, 211: Discharging barrel, 22: Piston rod, 23: Fixed block, 24: Rotating column, 25: Piston pad, 26: Porous disc, 27: Elastic cross pad, 3: Reciprocating track, 31: Fixed ring, 4: Rubber ring 1, 41: Primary screen, 5: Rubber ring 2, 51: Secondary screen, 6: Rubber ring 3, 61: Third stage screen, 7: Ring, 71: Vibration track, 8: Motor, 81: Rotating shaft, 82: Spline groove, 83: Rotating shaft, 9: Stirring frame, 91: Rotating ring, 10: Spline shaft, 101: Rectangular frame, 102: Roller, 103: Conveyor belt, 104: Rubber wheel, 105: Brush. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example 1 A multi-stage screening device for aluminum paste production, such as Figures 1-8 As shown, it includes a screening drum 1, a support frame 14 and a material bucket 2, the support frame 14 is fixedly connected to the screening drum 1, and the material bucket 2 is installed on the support frame 14, and also includes a suction mechanism, a primary screen 41, a secondary screen 51, a tertiary screen 61 and a vibration mechanism. The suction mechanism is arranged at the bottom of the material bucket 2, the primary screen 41, the secondary screen 51 and the tertiary screen 61 are respectively arranged in the screening drum 1 in an interval manner, and the vibration mechanism is arranged at the center of the primary screen 41, the secondary screen 51 and the tertiary screen 61. The vibration mechanism is used to vibrate the primary screen 41, the secondary screen 51 and the tertiary screen 61, so that the primary screen 41 is used to intercept large particles of impurities, the secondary screen 51 is used to separate aluminum powder particles that do not meet the particle size requirements, and the tertiary screen 61 is used to remove tiny impurities.

[0030] like Figure 2-Figure 4 As shown, the suction mechanism includes a piston cylinder 21, a discharge barrel 211, a piston rod 22, a piston pad 25 and a porous disc 26. The piston cylinder 21 is circumferentially distributed at the bottom of the material barrel 2 and is connected to the material barrel 2. The discharge barrel 211 is fixedly connected to one end of the bottom of the piston cylinder 21. The piston rod 22 slides in the center position of the piston cylinder 21. The piston pad 25 is arranged at one end of the piston rod 22 and is located in the piston cylinder 21. The piston pad 25 is sealed and slidably connected to the piston cylinder 21, and the porous disc 26 is installed at one end of the piston cylinder 21.

[0031] like Figure 3 As shown, the suction mechanism further includes an elastic cross pad 27, which is circumferentially distributed and installed on the porous disc 26. When the elastic cross pad 27 is subjected to pressure, it opens to the four sides in a petal shape.

[0032] like Figure 2-Figure 4 As shown, the suction mechanism also includes a fixed block 23, a rotating column 24, a reciprocating track 3 and a fixed ring 31. The fixed block 23 is installed at one end of the piston rod 22, the rotating column 24 is rotatably set on the fixed block 23, the reciprocating track 3 is set on the rotating column 24 and rotates and slides with the rotating column 24. Lubricating oil is provided in the reciprocating track 3, and the lubricating oil is used to reduce the friction on the rotating column 24. The fixed ring 31 is installed on the reciprocating track 3 and is located in the screening drum 1.

[0033] like Figure 2-Figure 5 As shown, the vibration mechanism includes a rubber ring 1 4, a rubber ring 2 5 and a rubber ring 3 6, which are installed in the screening cylinder 1 at intervals. The rubber ring 1 4, the rubber ring 2 5 and the rubber ring 3 6 are fixedly connected to the primary screen 41, the secondary screen 51 and the tertiary screen 61. The rubber ring 1 4, the rubber ring 2 5 and the rubber ring 3 6 have a certain elasticity. The rubber ring 1 4, the rubber ring 2 5 and the rubber ring 3 6 can vibrate along with the primary screen 41, the secondary screen 51 and the tertiary screen 61.

[0034] like Figure 5-Figure 6 As shown, the vibration mechanism also includes a ring 7, which is respectively installed at the center of the first-level screen 41, the second-level screen 51 and the third-level screen 61. A vibration track 71 is opened in the ring 7, and lubricating oil is provided in the vibration track 71. The vibration track 71 is wavy.

[0035] like Figure 5-Figure 6 As shown, it includes a motor 8, a rotating shaft 81 and a rotating shaft 83. The motor 8 is installed at the bottom of the material barrel 2. The rotating shaft 81 is connected to the output shaft of the motor 8. The rotating shaft 81 passes through the ring 7 and is slidably connected. The rotating shaft 83 is rotatably set on the rotating shaft 81. The rotating shaft 83 cooperates with the vibration track 71. The lubricating oil inside the vibration track 71 can reduce the friction when the rotating shaft 83 rotates.

[0036] like Figure 5-Figure 6 As shown, it includes a stirring frame 9 and a rotating ring 91 . The stirring frame 9 is fixedly connected to the rotating shaft 81 in a circumferential distribution. The rotating ring 91 is fixedly connected to the stirring frame 9 . The rotating ring 91 is fixedly connected to the fixed ring 31 .

[0037] like Figure 6-Figure 8As shown, it includes a spline shaft 10, a rectangular frame 101, rollers 102, a conveyor belt 103, a rubber wheel 104 and a brush 105. A spline groove 82 is opened on the rotating shaft 81, the spline shaft 10 is slidably set in the spline groove 82, the rectangular frame 101 is fixed to the spline shaft 10, the rollers 102 are mirror-rotated and connected in the rectangular frame 101, the conveyor belt 103 is arranged on the rollers 102, the rubber wheel 104 is rotatably connected to one of the rollers 102, the rubber wheel 104 is in contact with the inner wall of the screening drum 1, and the brush 105 is installed on one side of the rectangular frame 101.

[0038] like Figure 1-Figure 2 As shown, it includes a discharging rack 11, a discharging rack 2 12 and a discharging rack 3 13. Three rectangular openings are opened on the screening drum 1. The discharging rack 11, the discharging rack 2 12 and the discharging rack 3 13 are respectively installed in the three rectangular openings of the screening drum 1. The discharging rack 11, the discharging rack 2 12 and the discharging rack 3 13 correspond to the first-level screen 41, the second-level screen 51 and the third-level screen 61 respectively.

[0039] When the aluminum slurry needs to be screened, the staff pours the aluminum slurry into the material bucket 2. At this time, the elastic cross pad 27 on the porous disc 26 is in a closed state when it is not under pressure, so the aluminum slurry in the material bucket 2 is in a static state. Then the staff starts the motor 8, and the output shaft of the motor 8 drives the rotating shaft 81 to rotate, and then the rotating shaft 83 drives the vibration mechanism to reciprocate, so that the vibration mechanism drives the first-level screen 41, the second-level screen 51 and the third-level screen 61 to vibrate and screen the aluminum slurry. At the same time, when the rotating shaft 81 rotates, it drives the stirring frame 9 and the rotating ring 91 to rotate synchronously. When the rotating ring 91 rotates, it drives the fixed ring 31 and the reciprocating The track 3 rotates synchronously, and the reciprocating track 3 drives the rotating column 24 to do a reciprocating motion when rotating, so that the fixed block 23 drives the piston rod 22 to slide along the circumferential center of the piston cylinder 21, and then the piston rod 22 drives the piston pad 25 to slide along the inner wall of the piston cylinder 21. It is worth noting that when the piston rod 22 drives the piston pad 25 to slide along the inner wall of the piston cylinder 21 away from the material barrel 2, the inner wall of the piston cylinder 21 will generate an adsorption force, and then the adsorption force in the piston cylinder 21 adsorbs the elastic cross pad 27. When the elastic cross pad 27 is subjected to the adsorption force, the elastic cross pad 27 opens to the surroundings in a petal shape (such as Figure 4As shown in the figure), the piston cylinder 21 is connected to the material barrel 2 through the elastic cross pad 27, so that the aluminum slurry in the material barrel 2 enters the piston cylinder 21. When the adsorption force attracts and opens the elastic cross pad 27 to the four sides, the aluminum slurry is sucked into the piston cylinder 21 by the adsorption force. When the aluminum slurry in the material barrel 2 is sucked, the adsorption force can make the aluminum slurry flow and mix quickly, and can prevent the impurities in the aluminum slurry from settling at the bottom of the material barrel 2. When the piston rod 22 drives the piston pad 25 to slide along the inner wall of the piston cylinder 21 close to the side of the material barrel 2, air pressure will be generated in the piston cylinder 21, and the air pressure in the piston cylinder 21 will push the elastic cross pad 27. When the elastic cross pad 27 is pushed by the air pressure, At this time, the elastic cross pad 27 opens to the four sides in a petal shape, thereby connecting the piston cylinder 21 with the material barrel 2. At this time, there is gas pressure inside the piston cylinder 21, and the aluminum slurry has not entered the piston cylinder 21. When the gas pressure pushes the elastic cross pad 27 to the four sides, the aluminum slurry is blown by the gas pressure, and the aluminum slurry can be further flowed and mixed in the material barrel 2, which can prevent the impurities in the aluminum slurry from settling at the bottom of the material barrel 2. The aluminum slurry is evenly mixed in the material barrel 2 through the adsorption force and gas pressure, and the problem of precipitation or accumulation of impurities in the aluminum slurry is prevented, thereby effectively improving the subsequent screening effect, and preventing large particles of impurities in the aluminum slurry from accumulating on the primary screen 41, affecting the screening effect of the aluminum slurry.

[0040] When the piston rod 22 drives the piston pad 25 to slide along the inner wall of the piston cylinder 21 away from the material barrel 2, the piston pad 25 absorbs the aluminum slurry into the piston cylinder 21. As the reciprocating trajectory 3 rotates, the piston rod 22 drives the piston pad 25 away from the material barrel 2. The farther the distance, the more aluminum slurry in the piston cylinder 21. However, when the piston rod 22 drives the piston pad 25 to move to one end of the piston cylinder 21, the piston pad 25 will pass the discharge barrel 211, thereby allowing air to enter the interior of the piston cylinder 21. After the air enters, the adsorption of the piston pad 25 disappears, but the elastic cross The pad 27 is reset by its own elasticity. When the elastic cross pad 27 is closed, the aluminum powder slurry no longer enters the piston cylinder 21. At the same time, the aluminum powder slurry inside the piston cylinder 21 falls onto the primary screen 41 through the discharge barrel 211. When the piston rod 22 drives the piston pad 25 to slide along the inner wall of the piston cylinder 21 close to the side of the material barrel 2 and pass over the discharge barrel 211, air pressure is generated again inside the piston cylinder 21. Through the reciprocating trajectory 3, intermittent discharge of multiple discharge barrels 211 can be achieved, thereby preventing the problem of aluminum powder slurry accumulation on the primary screen 41 and improving the aluminum powder slurry screening effect.

[0041] When the aluminum powder slurry falls onto the primary screen 41 through the discharge barrel 211, the rotating shaft 81 drives the stirring frame 9 to rotate to evenly spread the falling aluminum powder slurry, so that the aluminum powder slurry falls evenly onto the primary screen 41. At the same time, the rotating shaft 81 drives the rotating shaft 83 to rotate. When the rotating shaft 83 rotates, it rotates along the vibration track 71 on the ring 7. Because the vibration track 71 is set to be wavy, the rotating shaft 83 continuously squeezes the ring 7 during rotation, and then drives the primary screen 41 to vibrate through the ring 7. When the primary screen 41 vibrates, it drives the rubber ring 4 up and down. The rubber ring 4 has a certain elasticity, thereby achieving the vibration effect of the primary screen 41. When the ring 7 drives the primary screen 41 to vibrate, the rotating shaft 83 drives the ring 7 to slide along the center of the rotating shaft 83 through the vibration track 71. When the primary screen 41 vibrates and screens the aluminum powder slurry, the large particles of impurities contained in the aluminum powder slurry are intercepted by the primary screen 41, and the rest of the aluminum powder slurry is not The aluminum powder is screened by the first-level screen 41 and falls onto the second-level screen 51. The vibration structure and working principle of the second-level screen 51 and the third-level screen 61 are the same as those of the first-level screen 41. At the same time, the rotating shaft 81 drives the rotating shaft 83 to rotate to realize the vibration principle. The second-level screen 51 will intercept the aluminum powder particles that do not meet the particle size requirements and then separate them through the second-level screen 51. At this time, the aluminum powder particles that meet the particle size requirements fall into the third-level screen 61, and the aluminum powder particles that do not meet the particle size requirements are intercepted on the second-level screen 51. At the same time, the aluminum powder particles that meet the particle size requirements fall into the third-level screen 61 for screening to remove tiny impurities in the aluminum powder. When the third-level screen 61 is screening, the aluminum powder particles fall from the third-level screen 61 to the bottom of the screening cylinder 1, and the aluminum powder particles fall into the collection box through the bottom of the screening cylinder 1. The tiny impurities are intercepted by the third-level screen 61. The effect of screening different impurities can be achieved by the first-level screen 41, the second-level screen 51 and the third-level screen 61.

[0042] When the large particles of impurities contained in the aluminum powder slurry are intercepted by the primary screen 41, the rotating shaft 81 drives the spline shaft 10 to rotate when it rotates, and the primary screen 41 and the ring 7 vibrate and drive the spline shaft 10 to move up and down synchronously along the spline groove 82 on the rotating shaft 81, so that the rectangular frame 101, the conveyor belt 103 and the brush 105 always keep in contact with the primary screen 41. When the spline shaft 10 rotates, it drives the rectangular frame 101 to rotate, and then the conveyor belt 103, the rubber wheel 104 and the brush 105 rotate with the rectangular frame 101. When the rectangular frame 101 rotates, it drives the rubber wheel 104 and the screen The inner wall of the cylinder 1 contacts, so that the rubber wheel 104 generates friction with the inner wall of the screening cylinder 1, and the friction will drive the rubber wheel 104 to rotate. The rotation of the rubber wheel 104 will drive one of the rollers 102 to rotate, and the rotation of the roller 102 will drive the conveyor belt 103 to rotate. When the conveyor belt 103 rotates along the contact surface of the primary screen 41, the large particles of impurities intercepted on the primary screen 41 are concentrated on one side of the conveyor belt 103. When the spline shaft 10 drives the rectangular frame 101 and the conveyor belt 103 to the outlet of the discharge rack 11, the large particles of impurities are continuously transported by the conveyor belt 103. During the quality control, the conveyor belt 103 transfers the large impurities accumulated on one side to the outlet of the discharging rack 11, and the large impurities flow into the collection box along the outlet of the discharging rack 11. The aluminum powder particles that do not meet the particle size requirements intercepted on the secondary screen 51 are also transferred to the outlet of the discharging rack 2 12 through the conveyor belt 103, and the aluminum powder particles that do not meet the particle size requirements flow into the collection box along the outlet of the discharging rack 2 12. The tiny impurities intercepted on the tertiary screen 61 are also transferred to the outlet of the discharging rack 3 13 through the conveyor belt 103, and the tiny impurities flow into the collection box along the outlet of the discharging rack 3 13. In the process, when the rectangular frame 101 rotates, the brush 105 cleans the impurities on the primary screen 41 at the same time, and transmits the large particles of impurities, aluminum powder particles that do not meet the particle size requirements and tiny impurities away from the primary screen 41, the secondary screen 51 and the tertiary screen 61 through the conveyor belt 103, and the brush 105 cleans the primary screen 41, the secondary screen 51 and the tertiary screen 61, and can effectively ensure the screening effect of the primary screen 41, the secondary screen 51 and the tertiary screen 61, as well as the cleaning of the primary screen 41, the secondary screen 51 and the tertiary screen 61 to prevent blockage.

[0043] Although the present disclosure has been shown and described with reference to certain exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-described embodiments, but should be determined not only by the appended claims but also by the equivalents of the appended claims.

Claims

1. A multi-stage screening device for aluminum slurry production, comprising a screening drum (1), a support frame (14) and a material holding barrel (2), wherein the support frame (14) is arranged on the screening drum (1), and the material holding barrel (2) is mounted on the support frame (14), characterized in that: The invention also includes a suction mechanism, a first-level screen (41), a second-level screen (51), a third-level screen (61) and a vibration mechanism. The suction mechanism is arranged at the bottom of the material barrel (2). The first-level screen (41), the second-level screen (51) and the third-level screen (61) are respectively arranged in intervals in the screening cylinder (1). The vibration mechanism is arranged at the center of the first-level screen (41), the second-level screen (51) and the third-level screen (61). The first-level screen (41) is used to intercept large particles of impurities, the second-level screen (51) is used to separate aluminum powder particles that do not meet the particle size requirements, and the third-level screen (61) is used to remove tiny impurities.

2. The multi-stage screening device for aluminum slurry production according to claim 1, characterized in that: The suction mechanism includes a piston cylinder (21), a discharge barrel (211), a piston rod (22), a piston pad (25) and a porous disc (26). The piston cylinder (21) is circumferentially distributed and arranged at the bottom of the material barrel (2). The discharge barrel (211) is fixedly connected to the bottom of the piston cylinder (21) in a communicating manner. The piston rod (22) slides in the piston cylinder (21). The piston pad (25) is arranged at one end of the piston rod (22) and is located in the piston cylinder (21). The piston pad (25) is sealed and slidably connected to the piston cylinder (21). The porous disc (26) is arranged at one end of the piston cylinder (21).

3. The multi-stage screening device for aluminum slurry production according to claim 2, characterized in that: The suction mechanism further comprises an elastic cross pad (27), which is circumferentially distributed on the porous disc (26). When the elastic cross pad (27) is subjected to pressure, it opens to the surroundings and takes the shape of petals.

4. The multi-stage screening device for aluminum slurry production according to claim 3, characterized in that: The suction mechanism further includes a fixed block (23), a rotating column (24), a reciprocating track (3) and a fixed ring (31), wherein the fixed block (23) is arranged at one end of the piston rod (22), the rotating column (24) is rotatably connected to the fixed block (23), the reciprocating track (3) is arranged on the rotating column (24) and is rotatably slidable with the rotating column (24), and the fixed ring (31) is arranged on the reciprocating track (3) and is located in the screening drum (1).

5. The multi-stage screening device for aluminum slurry production according to claim 1, characterized in that: The vibration mechanism includes a rubber ring 1 (4), a rubber ring 2 (5) and a rubber ring 3 (6). The rubber ring 1 (4), the rubber ring 2 (5) and the rubber ring 3 (6) are respectively arranged in a spaced manner in the screening cylinder (1). The rubber ring 1 (4), the rubber ring 2 (5) and the rubber ring 3 (6) are connected to the first-level screen (41), the second-level screen (51) and the third-level screen (61). The rubber ring 1 (4), the rubber ring 2 (5) and the rubber ring 3 (6) have a certain elasticity.

6. The multi-stage screening device for aluminum slurry production according to claim 5, characterized in that: The vibration mechanism further includes a circular ring (7), which is respectively arranged at the center of the first-level screen (41), the second-level screen (51) and the third-level screen (61). A vibration track (71) is opened in the circular ring (7), and the vibration track (71) is wavy.

7. The multi-stage screening device for aluminum slurry production according to claim 6, characterized in that: The invention comprises a motor (8), a rotating shaft (81) and a rotating shaft (83), wherein the motor (8) is mounted on the bottom of the material container (2), the rotating shaft (81) is connected to the output shaft of the motor (8), the rotating shaft (81) passes through the ring (7) and is slidably connected, the rotating shaft (83) is rotatably connected to the rotating shaft (81), and the rotating shaft (83) cooperates with the vibration track (71).

8. The multi-stage screening device for aluminum slurry production according to claim 4, characterized in that: The invention comprises a stirring frame (9) and a rotating ring (91), wherein the stirring frame (9) is circumferentially distributed on the rotating shaft (81), the rotating ring (91) is fixedly connected to the stirring frame (9), and the rotating ring (91) is fixedly connected to the fixed ring (31).

9. The multi-stage screening device for aluminum slurry production according to claim 7, characterized in that: The invention comprises a spline shaft (10), a rectangular frame (101), a roller (102), a conveyor belt (103), a rubber wheel (104) and a brush (105); a spline groove (82) is provided on the rotating shaft (81); the spline shaft (10) is slidably arranged in the spline groove (82); the rectangular frame (101) is fixed to the spline shaft (10); the roller (102) is mirror-rotated and arranged in the rectangular frame (101); the conveyor belt (103) is arranged around the roller (102); the rubber wheel (104) is rotatably arranged on the roller (102); the rubber wheel (104) is in contact with the inside of the screening drum (1); and the brush (105) is arranged on one side of the rectangular frame (101).

10. The multi-stage screening device for aluminum slurry production according to claim 1, characterized in that: The invention comprises a discharging rack 1 (11), a discharging rack 2 (12) and a discharging rack 3 (13). A plurality of rectangular openings are provided on the screening cylinder (1). The discharging rack 1 (11), the discharging rack 2 (12) and the discharging rack 3 (13) are respectively installed in the rectangular openings of the screening cylinder (1). The discharging rack 1 (11), the discharging rack 2 (12) and the discharging rack 3 (13) respectively correspond to the first-level screen (41), the second-level screen (51) and the third-level screen (61).

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