Multi-stage winnowing device for calcium powder production and winnowing method of multi-stage winnowing device

Abstract

The invention relates to the technical field of winnowing equipment, in particular to a multistage winnowing device for calcium powder production and a winnowing method thereof.The multistage winnowing device comprises a winnowing box, a first fan and a second fan, and the first fan and the second fan are installed on the outer side wall of the winnowing box and can blow air into the winnowing box. According to the scheme, through the arrangement of a plurality of pushing rod bodies, when calcium powder falls onto a sieve plate and is ground by a grinding roller for powder pressing, the grinding roller continues to move to make contact with a lower pressing block and abut against the lower pressing block downwards, and in the moving process of the lower pressing block, the pushing rod bodies push the ground calcium powder, so that the calcium powder is crushed, and the calcium powder is crushed. And the position which is not completely ground or does not fall through the sieve holes after being ground is changed, so that subsequent calcium powder processing is facilitated, and the calcium powder processing efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air separation equipment, and in particular to a multi-stage air separation device and an air separation method for producing calcium powder. Background Art

[0002] Calcium powder air separation is a common physical separation technology used to remove impurities and classify particles of different sizes from calcium powder. This technology is usually used to produce high-quality calcium powder products.

[0003] For example, a multi-stage grinding, screening and air separation device with Chinese patent publication number CN116747935B, when the material is crushed through the crushing roller and the filter plate, the crushed material will fall through the filter plate after crushing, but in this process, a part of the crushed material will be on one side of the filter hole on the filter plate and will not fall through the filter hole, affecting the normal material discharge process, and there will be dead corners in the crushing process, which may make it impossible to crush the material comprehensively.

[0004] In addition, during the material discharge process, smaller particles of material may adhere to the leeward side of larger pieces of material, thereby driving the smaller particles of material to fall into the inappropriate collection area, resulting in an inadequate particle sorting effect.

[0005] In view of the above problems, a multi-stage air separation device and an air separation method for calcium powder production are proposed. Summary of the invention

[0006] In order to solve the above problems, the embodiments of the present invention provide a multi-stage air separation device and an air separation method for calcium powder production, which solves the problem of low calcium powder processing efficiency mentioned in the background technology.

[0007] In order to achieve the above-mentioned purpose, the embodiment of the present invention specifically adopts the following technical scheme: a multi-stage air separation device for calcium powder production, comprising an air separation box, a first fan and a second fan, wherein the first fan and the second fan are installed on the outer side wall of the air separation box and can blow air into the air separation box;

[0008] A discharge barrel is provided on the top of the air separation box, and the roughly processed calcium powder is poured into the air separation box through the discharge barrel. A processing mechanism is provided in the discharge barrel, and the processing mechanism is used to crush and discharge the roughly processed calcium powder. A uniform distribution frame is provided in the discharge barrel, and the uniform distribution frame is located above the processing mechanism;

[0009] The air separation box is connected with multiple primary sorting plates, and there are downward movement openings between the multiple primary sorting plates, which are sealed by fixed plates. The inner bottom of the air separation box is provided with multiple secondary sorting plates, which divide the inner bottom of the air separation box into multiple collecting slots. Calcium powder will fall into different collecting slots according to the size of the particles.

[0010] Furthermore, the first fan is arranged above the primary sorting plate, and the second fan is arranged between the primary sorting plate and the secondary sorting plate.

[0011] Furthermore, the uniform distribution frame is slidably connected to the inner side wall of the material discharge barrel, a plurality of material discharge shafts are rotatably connected to the uniform distribution frame, a bearing plate is fixedly connected to the outer side wall of the material discharge shaft, and the plurality of bearing plates close the uniform distribution frame when they are laid flat;

[0012] A flip gear is fixedly connected to the outer wall of the unloading shaft, a cylinder is fixedly connected to the outer wall of the uniform distribution frame, a flip rack is fixedly connected to the output end of the cylinder, the flip rack is meshed with multiple flip gears, and the cylinder controls the movement of the flip rack to drive multiple carrier plates to be placed vertically or horizontally.

[0013] Furthermore, the processing mechanism includes a sieve plate arranged in the lower barrel, the sieve plate is provided with a partition plate, the partition plate divides the sieve plate into a plurality of equal partition sections, and a rolling roller is provided in each of the plurality of partition sections, and the rolling roller is used to roll the larger pieces of calcium powder to make it into powder;

[0014] A pushing rod body is connected to one side of the partition plate, and the pushing rod body is connected to the partition plate through a telescopic rod. An operating panel is connected to the side wall of the sieve plate corresponding to the partition section, and the operating panel is slidably connected to a downward moving block in a vertical direction. A downward pressing block is provided on the top of the downward moving block, and the downward pressing block is arranged in a triangular manner. During the movement of the rolling roller, the downward moving block can be pushed downward by the downward pressing block. A fixing frame is provided at the bottom of the operating panel, and a reset spring is provided between the fixing frame and the downward moving block for resetting the downward moving block after it moves downward.

[0015] An L-shaped pushing rod is fixedly connected to the downward moving block. The pushing rod is connected to the pushing rod body through a transmission rod. The downward movement of the pushing rod can drive the pushing rod body to move in the partition section.

[0016] Furthermore, the inner side wall of the discharge barrel is provided with a plurality of electric push rods, which can push the rolling roller to move on the partition section and its corresponding operating panel.

[0017] Furthermore, a sliding shaft is fixedly connected to the bottom of the screen plate, a knocking rod body is slidably connected to the outer wall of the sliding shaft, and a plurality of knocking rollers are fixedly connected to the knocking rod body, and the screen plate is knocked by the knocking rollers when the knocking rod body is quickly reset after moving downward;

[0018] A limit plate is provided at the bottom end of the sliding shaft, and the limit plate is used to limit the maximum distance of the knocking rod body moving downward, and a knocking spring is provided between the limit plate and the knocking rod body;

[0019] The knocking rod body is slidably connected with a pushing block, and the upper and lower surfaces of the pushing block are both inclined surfaces, and a connecting spring is arranged between the pushing block and the knocking rod body. When the lower moving block moves downward, it resists the pushing block from moving downward, and the connecting spring will be compressed after the pushing block contacts the limit plate, and then the knocking rod body moves upward quickly and knocks the screen plate through the knocking roller;

[0020] A reserved groove is provided on the downward moving block, and when the pushing block is in the reserved groove, it will not contact the side wall of the bottom of the reserved groove.

[0021] Furthermore, a plurality of supporting legs are provided at the bottom end of the air separation box. The number of the supporting legs is four and they are arranged in a rectangular manner at the bottom of the air separation box.

[0022] Furthermore, a pneumatic push rod is fixedly connected to the inner side wall of the air separation box, a plurality of fixed plates are connected by a fixed rod, and an output end of the pneumatic push rod is fixedly connected to the fixed rod.

[0023] Furthermore, a vibration rod is fixedly connected to the output end of the electric push rod, and a plurality of protrusions are provided at the bottom of the uniform distribution frame. During the movement of the vibration rod, the uniform distribution frame is continuously vibrated by the action of the protrusions.

[0024] A method for air separation of a multi-stage air separation device for producing calcium powder, comprising the following steps:

[0025] ① Pour the roughly processed calcium powder into the uniform distribution frame in the discharge barrel. The uniform distribution frame will continue to shake to evenly distribute the calcium powder on the uniform distribution frame. The evenly distributed calcium powder will fall onto the sieve plate through the uniform distribution frame;

[0026] ② The calcium powder on the screen plate is rolled by a rolling roller, and the rolled calcium powder falls downward;

[0027] ③ The falling calcium powder will be affected by the wind force of the first fan and fall onto the fixed plates in the multiple lower ports according to the size of the particles;

[0028] ④ The pneumatic push rod moves multiple fixed plates, and the calcium powder particles continue to fall under the action of gravity. The second fan is used to perform secondary screening on the calcium powder.

[0029] The beneficial effects of the embodiments of the present invention are:

[0030] 1. By setting up multiple pushing rods, when the calcium powder falls onto the screen plate and is rolled by the rolling roller for powder pressing, the rolling roller will continue to move and contact the lower pressing block, and push the lower pressing block down. During the movement of the lower pressing block, the pushing rod will push the rolled calcium powder, so that the position of the calcium powder that is not completely rolled or that has not fallen through the sieve hole after rolling will change, which is convenient for the subsequent processing of calcium powder and improves the processing efficiency of calcium powder.

[0031] 2. During the movement of the rolling roller, the vibration rod can be driven to move, so that the material on the uniform distribution frame is evenly distributed. Then the cylinder will periodically rotate multiple material discharge shafts so that the evenly distributed material can fall down, preventing the material that falls on the screen plate from piling up somewhere.

[0032] 3. By setting up multiple primary sorting plates, when the calcium powder falls, even if there are small particles of calcium powder adsorbed on the leeward side of the larger calcium powder, the adsorbed small particles of calcium powder will be separated by vibration when it falls on the fixed plate, and then fall into the corresponding collection tank during the downward movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 for Figure 1 A in the enlarged view;

[0035] Figure 3 It is a schematic diagram of the position of the push rod body in the present invention;

[0036] Figure 4 It is a schematic diagram of the positions of the downward moving block and the pushing block in the present invention;

[0037] Figure 5 It is a schematic diagram of the structure of the knocking roller and the knocking rod body in the present invention;

[0038] Figure 6 Schematic diagram of the position of the vibration rod in the present invention.

[0039] In the figure: 1. air separation box; 2. support feet; 3. unloading barrel; 4. first fan; 5. second fan; 6. uniform distribution frame; 7. unloading shaft; 8. bearing plate; 9. flip rack; 10. cylinder; 11. bump; 12. vibration rod; 13. electric push rod; 14. sieve plate; 15. rolling roller; 16. operating panel; 17. lowering block; 18. reset spring; 19. pushing rod body; 20. partition plate; 21. lower pressure block; 22. fixed frame; 23. knocking rod body; 24. pushing block; 25. connecting spring; 26. knocking spring; 27. sliding shaft; 28. knocking roller; 29. ​​pushing rod; 30. transmission rod; 31. primary sorting plate; 32. lower shifting port; 33. fixed plate; 34. pneumatic push rod; 35. secondary sorting plate; 36. fixed rod. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0041] Example 1

[0042] See also Figure 1-6 A multi-stage air separation device for producing calcium powder and an air separation method thereof, comprising an air separation box 1, a first fan 4 and a second fan 5, wherein the first fan 4 and the second fan 5 are installed on the outer side wall of the air separation box 1 and can blow air into the air separation box 1;

[0043] The first fan 4 is arranged above the primary separation plate 31, and the second fan 5 is arranged between the primary separation plate 31 and the secondary separation plate 35. Figure 1 The blowing directions of the first fan 4 and the second fan 5 are perpendicular to the side wall of the air separation box 1, and the blowing position of the first fan 4 is between the sieve plate 14 and the primary separation plate 31.

[0044] The bottom end of the air separation box 1 is provided with a plurality of legs 2, the number of the legs 2 being four and arranged in a rectangular manner at the bottom of the air separation box 1. The legs 2 are used to support the air separation box 1.

[0045] A discharge barrel 3 is provided at the top of the air separation box 1, and the roughly processed calcium powder is poured into the air separation box 1 through the discharge barrel 3. A processing mechanism is provided in the discharge barrel 3, and the processing mechanism is used to crush and discharge the roughly processed calcium powder. A uniform distribution frame 6 is provided in the discharge barrel 3, and the uniform distribution frame 6 is located above the processing mechanism.

[0046] The uniform distribution frame 6 is slidably connected to the inner side wall of the discharge barrel 3. A plurality of discharge shafts 7 are rotatably connected to the uniform distribution frame 6. A bearing plate 8 is fixedly connected to the outer side wall of the discharge shaft 7. The plurality of bearing plates 8 close the uniform distribution frame 6 when laid flat.

[0047] In the initial state, the supporting plate 8 is arranged flat, and the uniform distribution frame 6 is closed. Then the operator pours the roughly processed calcium powder into the discharge barrel 3. The poured calcium powder will fall on the surface of the uniform distribution frame 6, and then it will be spread flat on the surface of the uniform distribution frame 6. In this way, the calcium powder can be evenly distributed on the screen plate 14, which is convenient for its rolling processing.

[0048] A turning gear is fixedly connected to the outer wall of the unloading shaft 7, a cylinder 10 is fixedly connected to the outer wall of the uniform distribution frame 6, a turning rack 9 is fixedly connected to the output end of the cylinder 10, the turning rack 9 is meshed with a plurality of turning gears, and the cylinder 10 controls the movement of the turning rack 9 to drive the vertical or horizontal placement of a plurality of bearing plates 8. When the calcium powder is spread on the uniform distribution frame 6, the cylinder 10 drives the turning rack 9 to move, and the movement of the turning rack 9 causes the turning gear to rotate, thereby causing the plurality of bearing plates 8 to rotate, so that the bearing plates 8 are vertical, and the spread calcium powder falls onto the sieve plate 14 through the gaps between the bearing plates 8.

[0049] Example 2

[0050] The processing mechanism includes a sieve plate 14 arranged in the discharge barrel 3, on which a partition plate 20 is provided. The partition plate 20 divides the sieve plate 14 into a plurality of equal partition sections. A rolling roller 15 is provided in each of the plurality of partition sections. The rolling roller 15 is used to roll larger pieces of calcium powder to make it into powder.

[0051] See attached Figure 3 -Attached Figure 4 , a push rod 19 is connected to one side of the partition plate 20, and the push rod 19 is connected to the partition plate 20 through a telescopic rod. The push rod 19 can move on the surface of the sieve plate 14. An operating panel 16 is connected to the side wall of the sieve plate 14 corresponding to the partition section, and the operating panel 16 is slidably connected to a downward block 17 in the vertical direction, and a downward pressing block 21 is provided on the top of the downward block 17, and the downward pressing block 21 is arranged in a triangular manner. During the movement of the rolling roller 15, the downward block 17 can be pushed downward by the downward pressing block 21. A fixing frame 22 is provided at the bottom of the operating panel 16, and a reset spring 18 for resetting the downward block 17 after the downward movement is provided between the fixing frame 22 and the downward block 17; a plurality of electric push rods 13 are provided on the inner side wall of the unloading barrel 3, and the electric push rods 13 can push the rolling roller 15 to move on the partition section and its corresponding operating panel 16.

[0052] The specific operation is as follows: when the roughly processed calcium powder in the above embodiment falls onto the sieve plate 14, refer to the attached Figure 3 The electric push rod 13 will synchronously drive the multiple rolling rollers 15 to move repeatedly in the multiple partitions. During the movement, the calcium powder on the screen plate 14 is crushed, and part of the crushed calcium powder will fall through the sieve holes on the screen plate 14. When the rolling roller 15 moves to the operating panel 16, refer to the attached Figure 4 , the rolling roller 15 will contact the inclined surface of the lower pressing block 21 and press the lower pressing block 21 and the entirety of the downward moving block 17 downward. When the rolling roller 15 is disengaged from the lower pressing block 21, the entirety of the lower pressing block 21 and the downward moving block 17 will be reset under the action of the reset spring 18.

[0053] An L-shaped pushing rod 29 is fixedly connected to the downward moving block 17 . The pushing rod 29 is connected to the pushing rod body 19 via a transmission rod 30 . The downward movement of the pushing rod 29 can drive the pushing rod body 19 to move in the partition section.

[0054] As mentioned above, when the downward moving block 17 moves downward, it will drive the pushing rod 29 to move downward. During the downward movement of the pushing rod 29, the driving rod body 19 will be driven to move in the partition section on the sieve plate 14 under the action of the transmission rod 30, so as to push the compacted calcium powder. This operation can avoid the situation where the calcium powder cannot be compacted at the dead corner of the compacting roller 15, and can also push the compacted calcium powder to the position of the sieve hole, thereby improving the feeding efficiency of the calcium powder.

[0055] See attached Figure 5 The bottom of the sieve plate 14 is fixedly connected with a sliding shaft 27, and a knocking rod 23 is slidably connected to the outer wall of the sliding shaft 27. A plurality of knocking rollers 28 are fixedly connected to the knocking rod 23. When the knocking rod 23 is quickly reset after moving downward, the sieve plate 14 is knocked by the knocking rollers 28;

[0056] A limit plate is provided at the bottom end of the sliding shaft 27, and the limit plate is used to limit the maximum distance of the knocking rod body 23 moving downward, and a knocking spring 26 is provided between the limit plate and the knocking rod body 23;

[0057] The knocking rod body 23 is slidably connected with a push block 24. The upper and lower surfaces of the push block 24 are inclined surfaces at the position directly below the lower moving block 17. A connecting spring 25 is arranged between the push block 24 and the knocking rod body 23. When the lower moving block 17 moves downward, it resists the push block 24 from moving downward. When the push block 24 contacts the limit plate, the connecting spring 25 will be compressed. Then the knocking rod body 23 moves upward quickly and knocks the screen plate 14 through the knocking roller 28. In this way, the crushed calcium powder is accelerated to fall from the screen plate 14. A reserved groove is provided on the lower moving block 17. When the push block 24 is in the reserved groove, it will not contact the side wall at the bottom of the reserved groove.

[0058] The specific way in which the knocking roller 28 knocks the screen plate 14 is as follows: when the above-mentioned rolling roller 15 pushes the downward moving block 17 to move downward, the side wall of the downward moving block 17 will contact the inclined surface of the pushing block 24, and drive the knocking rod body 23 to move downward through the pushing block 24 (the knocking spring 26 will be compressed during this process). During the downward movement of the knocking rod body 23, the connecting spring 25 will not be compressed. When the knocking rod body 23 moves to the position of the limit plate, the downward moving block 17 will continue to move downward. At this time, the continued downward movement of the downward moving block 17 will push the push rod body 23 through the inclined surface on the pushing block 24. The block 24 is pushed in the direction of the knocking rod body 23, and the connecting spring 25 will be continuously compressed at this time. Then, when the downward block 17 continues to move downward, the pushing block 24 will be separated from the side wall at the bottom of the downward block 17, and the pushing block 24 will enter the reserved groove. After the pushing block 24 enters the reserved groove, the compressed knocking spring 26 will release the compressed elastic force, thereby driving the knocking rod body 23 to move upward, and then the sieve plate 14 is knocked under the action of multiple knocking rollers 28 to prevent the sieve holes from being blocked by calcium powder, and it can also accelerate the calcium powder to fall from the sieve plate 14.

[0059] A vibration rod 12 is fixedly connected to the output end of the electric push rod 13 , and a plurality of protrusions 11 are provided at the bottom of the uniform distribution frame 6 . During the movement of the vibration rod 12 , the protrusions 11 act to make the uniform distribution frame 6 vibrate continuously.

[0060] This method is a preferred solution for the above-mentioned embodiment based on spreading the calcium powder on the uniform distribution frame 6. The specific method is that when the electric push rod 13 drives the rolling roller 15 to move, it synchronously drives the vibration rod 12 to move. The vibration rod 12 contacts the protrusion 11 during the movement. Under the action of the shape of the protrusion 11, the uniform distribution frame 6 can be shaken up and down, thereby spreading the poured calcium powder on the surface of the uniform distribution frame 6.

[0061] Example 3

[0062] The air separation box 1 is connected with a plurality of primary separation plates 31, and there are downward shifting openings 32 between the plurality of primary separation plates 31, and the downward shifting openings 32 are sealed by a fixing plate 33.

[0063] The inner side wall of the air separation box 1 is fixedly connected with a pneumatic push rod 34 , and a plurality of fixed plates 33 are connected by a fixed rod 36 . The output end of the pneumatic push rod 34 is fixedly connected to the fixed rod 36 .

[0064] See attached Figure 1 The crushed calcium powder will fall down, and in the process of falling down, some of the larger calcium powder will adhere to some smaller calcium powder particles and fall into the lower moving port 32 near the first fan 4, while other calcium powder particles will fall into different lower moving ports 32 according to their gravity, and the calcium powder will be screened for the first time. The calcium powder will be supported by the fixed plate 33, and the larger particles will contact the fixed plate 33 when falling down, and the smaller calcium powder particles that adhere to the surface of the larger particles will be separated from the surface of the larger particles under the action of vibration, and then the multiple fixed plates 33 will be moved by controlling the pneumatic push rod 34, and the lower moving port 32 will be opened at this time, and the calcium powder will fall down, and the calcium powder will be screened for the second time by the action of the second fan 5.

[0065] The inner bottom of the air separation box 1 is provided with a plurality of secondary sorting plates 35, which divide the inner bottom of the air separation box 1 into a plurality of collecting slots, and the calcium powder will fall into different collecting slots according to the size of the particles. The positions of the collecting slots and the lower shifting port 32 correspond to each other.

[0066] A method for air separation of a multi-stage air separation device for producing calcium powder, comprising the following steps:

[0067] ① Pour the roughly processed calcium powder into the uniform distribution frame 6 in the lower barrel 3, the uniform distribution frame 6 will continue to shake, and the calcium powder will be evenly dispersed on the uniform distribution frame 6, and the uniformly distributed calcium powder will fall onto the sieve plate 14 through the uniform distribution frame 6;

[0068] ② The calcium powder on the sieve plate 14 is rolled by the rolling roller 15, and the rolled calcium powder falls downward;

[0069] ③ The falling calcium powder is affected by the wind force of the first fan 4 and falls onto the fixed plates 33 in the multiple lower moving ports 32 according to the size of the particles;

[0070] ④ The multiple fixed plates 33 are moved by the action of the pneumatic push rod 34, and the calcium powder particles continue to fall under the action of gravity, and the calcium powder is screened for the second time by the action of the second fan 5.

[0071] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0072] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A multi-stage air separation device for producing calcium powder, comprising an air separation box (1), a first fan (4) and a second fan (5), characterized in that: The first fan (4) and the second fan (5) are installed on the outer side wall of the air separation box (1) and are capable of blowing air into the air separation box (1); A discharge barrel (3) is provided on the top of the air separation box (1), and the roughly processed calcium powder is poured into the air separation box (1) through the discharge barrel (3). A processing mechanism is provided in the discharge barrel (3), and the processing mechanism is used to crush and discharge the roughly processed calcium powder. A uniform distribution frame (6) is provided in the discharge barrel (3), and the uniform distribution frame (6) is located above the processing mechanism. The air separation box (1) is connected to a plurality of primary separation plates (31), a downward shifting opening (32) is provided between the plurality of primary separation plates (31), and the downward shifting opening (32) is sealed by a fixing plate (33). The inner bottom of the air separation box (1) is provided with a plurality of secondary separation plates (35), and the secondary separation plates (35) divide the inner bottom of the air separation box (1) into a plurality of collection slots, and the calcium powder will fall into different collection slots according to the size of the particles.

2. A multi-stage air separation device for calcium powder production according to claim 1, characterized in that: The first fan (4) is arranged above the primary sorting plate (31), and the second fan (5) is arranged between the primary sorting plate (31) and the secondary sorting plate (35).

3. A multi-stage air separation device for calcium powder production according to claim 1, characterized in that: The uniform distribution frame (6) is slidably connected to the inner side wall of the discharge barrel (3); a plurality of discharge shafts (7) are rotatably connected to the uniform distribution frame (6); a bearing plate (8) is fixedly connected to the outer side wall of the discharge shaft (7); and the plurality of bearing plates (8) close the uniform distribution frame (6) when they are laid flat; A turning gear is fixedly connected to the outer wall of the unloading shaft (7), a cylinder (10) is fixedly connected to the outer wall of the uniform distribution frame (6), an output end of the cylinder (10) is fixedly connected to a turning rack (9), the turning rack (9) is meshingly connected with a plurality of turning gears, and the cylinder (10) controls the movement of the turning rack (9) to drive the plurality of bearing plates (8) to be placed vertically or horizontally.

4. A multi-stage air separation device for calcium powder production according to claim 1, characterized in that: The processing mechanism comprises a sieve plate (14) arranged in a lower barrel (3), a partition plate (20) being arranged on the sieve plate (14), the partition plate (20) dividing the sieve plate (14) into a plurality of equal partition sections, a rolling roller (15) being arranged in each of the plurality of partition sections, the rolling roller (15) being used to roll larger pieces of calcium powder to make them into powder; A push rod (19) is connected to one side of the partition plate (20), and the push rod (19) is connected to the partition plate (20) through a telescopic rod. An operating panel (16) is connected to the side wall of the sieve plate (14) corresponding to the partition section. The operating panel (16) is slidably connected to a downward moving block (17) in a vertical direction. A downward pressing block (21) is provided on the top of the downward moving block (17). The downward pressing block (21) is arranged in a triangular shape. During the movement of the rolling roller (15), the downward moving block (17) can be pushed downward by the downward pressing block (21). A fixing frame (22) is provided at the bottom of the operating panel (16). A reset spring (18) is provided between the fixing frame (22) and the downward moving block (17) for resetting the downward moving block (17) after it moves downward. An L-shaped pushing rod (29) is fixedly connected to the downward moving block (17). The pushing rod (29) is connected to the pushing rod body (19) via a transmission rod (30). The downward movement of the pushing rod (29) can drive the pushing rod body (19) to move in the partition section.

5. A multi-stage air separation device for calcium powder production according to claim 4, characterized in that: The inner side wall of the unloading barrel (3) is provided with a plurality of electric push rods (13), and the electric push rods (13) can push the rolling rollers (15) to move on the partition section and its corresponding operating plate (16).

6. A multi-stage air separation device for calcium powder production according to claim 4, characterized in that: The bottom of the sieve plate (14) is fixedly connected to a sliding shaft (27), the outer side wall of the sliding shaft (27) is slidably connected to a knocking rod body (23), and the knocking rod body (23) is fixedly connected to a plurality of knocking rollers (28), and when the knocking rod body (23) is quickly reset after moving downward, the sieve plate (14) is knocked by the knocking rollers (28); A limit plate is provided at the bottom end of the sliding shaft (27), and the limit plate is used to limit the maximum distance of the knocking rod body (23) moving downward, and a knocking spring (26) is provided between the limit plate and the knocking rod body (23); The knocking rod body (23) is slidably connected with a pushing block (24), and the upper and lower surfaces of the pushing block (24) located directly below the downward moving block (17) are both inclined surfaces. A connecting spring (25) is provided between the pushing block (24) and the knocking rod body (23). When the downward moving block (17) moves downward, it resists the pushing block (24) to move downward. When the pushing block (24) contacts the limit plate, the connecting spring (25) is compressed, and then the knocking rod body (23) moves upward quickly and knocks the screen plate (14) through the knocking roller (28); The downward moving block (17) is provided with a reserved groove, and when the pushing block (24) is in the reserved groove, it will not contact the side wall of the bottom of the reserved groove.

7. A multi-stage air separation device for calcium powder production according to claim 1, characterized in that: The bottom end of the air separation box (1) is provided with a plurality of supporting legs (2), the number of the supporting legs (2) is four, and the supporting legs (2) are arranged in a rectangular manner at the bottom of the air separation box (1).

8. A multi-stage air separation device for calcium powder production according to claim 1, characterized in that: The inner side wall of the air separation box (1) is fixedly connected with a pneumatic push rod (34), a plurality of fixed plates (33) are connected via a fixed rod (36), and an output end of the pneumatic push rod (34) is fixedly connected to the fixed rod (36).

9. A multi-stage air separation device for calcium powder production according to claim 5, characterized in that: A vibration rod (12) is fixedly connected to the output end of the electric push rod (13), and a plurality of protrusions (11) are provided at the bottom of the uniform distribution frame (6). During the movement of the vibration rod (12), the protrusions (11) act to cause the uniform distribution frame (6) to vibrate continuously.

10. A method for air separation using a multi-stage air separation device for producing calcium powder, characterized in that: The following steps are involved: ① Pour the roughly processed calcium powder onto the uniform distribution frame (6) in the discharge barrel (3); the uniform distribution frame (6) will continuously shake to evenly distribute the calcium powder on the uniform distribution frame (6); the evenly distributed calcium powder will fall onto the sieve plate (14) through the uniform distribution frame (6); ② The calcium powder on the sieve plate (14) is rolled by a rolling roller (15), and the rolled calcium powder falls downward through the sieve holes; ③ The falling calcium powder is affected by the wind force of the first fan (4) and falls onto the fixed plates (33) in the plurality of lower transfer ports (32) according to the size of the particles; ④ The plurality of fixed plates (33) are moved by the action of the pneumatic push rod (34), and the calcium powder particles continue to fall under the action of gravity, and the calcium powder is screened for a second time by the action of the second fan (5).

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