Automatic feeding and screening mechanism for Raymond mill

Abstract

The utility model discloses an automatic feed screening mechanism for Raymond mill, mainly relates to the technical field of Raymond machine. Including base, and the shaking box of rotation setting on the base, the shaking box is obliquely arranged on the base, and the both ends of shaking box are equipped with material inlet and first material outlet respectively, and a plurality of sieve holes are equipped on the shaking box, a plurality of eccentric wheels are rotatably connected at the sieve holes, the bottom of shaking box is equipped with the collecting box that is linked with the sieve hole, the end of collecting box is equipped with second material outlet, and the both ends of shaking box are equipped with the pole of pushing, the arc -shaped groove of sliding contact with the pole of pushing is equipped on the base, and the push block is slidably connected on the base, and the horizontal slot of sliding contact with the pole of pushing is equipped on the push block. The utility model has the beneficial effect that solves the problem of material blockage Raymond mill feed inlet when feeding Raymond mill, reduces the number of cleaning downtime, reduces the labor intensity of staff, and improves the production efficiency of Raymond mill.

Description

Technical Field

[0001] This utility model relates to the technical field of Raymond mills, specifically an automatic feeding and screening mechanism for Raymond mills. Background Technology

[0002] As a key aluminosilicate mineral raw material, fused alumina holds an irreplaceable position in various industrial fields such as refractory materials, ceramics, building materials, and metallurgy due to its excellent high-temperature resistance, good chemical stability, and high aluminum content. In actual industrial production processes, fused alumina needs to undergo a series of processing steps such as crushing, grinding, and grading to form powdered materials of specific particle sizes before it can meet the technical requirements of subsequent production processes. Raymond mills, as highly efficient medium-fine grinding equipment, have become the core equipment in the current fused alumina grinding and processing system due to their compact structure, convenient operation, and high grinding efficiency.

[0003] In the actual process of crushing and grinding coke using Raymond mills, the uneven particle size distribution of the raw coke ore after initial crushing is a significant problem, leading to a substantial efficiency bottleneck in the existing Raymond mill process. Specifically, this manifests in two core issues: Firstly, for coke materials with larger particle sizes, blockages easily occur at the Raymond mill's feed inlet and subsequent grinding chamber feed channels because the particle diameter exceeds the effective flow size of the feed inlet. Such blockages not only directly interrupt the continuous production process but also require operators to stop the machine for manual cleaning, increasing labor intensity and wasting considerable production time, severely reducing overall processing efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic feeding and screening mechanism for Raymond mills, which solves the problem of material clogging the feed inlet of Raymond mills during feeding, reduces the number of downtimes for cleaning, reduces the labor intensity of workers, and improves the production efficiency of Raymond mills.

[0005] To achieve the above objectives, the utility model employs the following technical solution: An automatic feeding and screening mechanism for a Raymond mill includes a base and a shaking box rotatably mounted on the base. The shaking box is tilted on the base, with a material inlet and a first material outlet at both ends. The shaking box has a plurality of screen holes, and a plurality of eccentric wheels are rotatably connected to the screen holes. The bottom of the shaking box has a collecting box communicating with the screen holes, and the end of the collecting box has a second material outlet. Both ends of the shaking box have levers. The base has arc-shaped grooves that slide in contact with the levers. A push block is slidably connected to the base, and the push block has a transverse groove that slides in contact with the levers.

[0006] Furthermore, the shaking box is rotatably connected to a first rotating shaft connected to an eccentric wheel, and the end of the first rotating shaft is provided with a first gear. The shaking box is rotatably connected to a plurality of second rotating shafts, the ends of the second rotating shafts are provided with cams, and the two sides of the cams are respectively provided with racks that mesh with the first gears.

[0007] Furthermore, a limiting wheel is keyed to the first rotating shaft, and several limiting grooves are provided on both sides of the shaking box. Several limiting blocks that slide in contact with the limiting grooves are provided on one side of the limiting wheel.

[0008] Furthermore, a connecting block is provided between two adjacent limiting wheels, a turntable is provided on the second rotating shaft, arc-shaped blocks are provided on both sides of the turntable, and inclined surfaces that contact the connecting block are provided on both sides of the arc-shaped blocks, a fixing nut is provided on the first rotating shaft, and a return spring is provided between the fixing nut and the limiting wheel.

[0009] Furthermore, it also includes a rotary motor mounted on the shaking box, wherein the movable end of the rotary motor is provided with a second gear, and the second rotating shaft is provided with a third gear that meshes with the second gear.

[0010] Furthermore, the end of the lever is provided with a roller that contacts the arc-shaped groove.

[0011] Furthermore, a first bearing and a second bearing are respectively provided between the roller and the lever, and between the base and the shaking box.

[0012] Furthermore, the base is equipped with a telescopic cylinder, and the movable end of the telescopic cylinder is connected to the push block.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The material enters the shaking box through the material inlet on one side of the shaking box. The push block slides back and forth on the base. The horizontal groove on the push block contacts the lever, which drives the lever to move back and forth. With the help of the arc groove guiding the lever, the shaking box swings back and forth on the base. At the same time, due to the tilting setting of the shaking box, the material is further driven to continuously shake and move down in the shaking box, avoiding the material with a large outer diameter from staying on the screen hole for a long time and causing the screen hole to be blocked. This reduces the number of times the machine needs to be stopped for cleaning, reduces the labor intensity of the workers, and improves the production efficiency of Raymond mill. 2. Through the screening of the screen holes, materials with larger particle sizes cannot pass through smoothly and will be discharged from the first material outlet on the other side of the shaking box and returned to the previous stage of crushing machinery. This prevents materials with larger particle sizes from entering the Raymond mill and clogging the feed inlet of the Raymond mill, thereby further reducing the number of shutdowns for cleaning, reducing the labor intensity of workers, and improving the production efficiency of the Raymond mill. 3. Materials with qualified particle size will pass smoothly through the screen holes and enter the lower collecting box, where the materials will gather and slide out from the second material outlet on the other side, entering the feed inlet of the Raymond mill below, thereby realizing secondary crushing of coke gemstones and meeting the technical requirements of subsequent production processes. 4. By rotating the eccentric wheel on the shaking box, the size of the screen holes can be adjusted to adapt to the material processing requirements under different conditions. This ensures that materials with qualified particle sizes enter the Raymond mill, while larger particles are returned to the next stage of crushing machinery. This further reduces the number of downtime cleanings, reduces the labor intensity of workers, and improves the production efficiency of the Raymond mill. Attached Figure Description

[0014] Appendix Figure 1 This is a structural schematic diagram of the shaking box of this utility model.

[0015] Appendix Figure 2 This is a schematic diagram of the eccentric wheel of this utility model.

[0016] Appendix Figure 3 This is an appendix to the utility model Figure 1 A magnified view of part A in the middle.

[0017] Appendix Figure 4 This is a schematic diagram of the structure of the second rotating shaft of this utility model.

[0018] Appendix Figure 5 This is a schematic diagram of the structure of the cam of this utility model.

[0019] Appendix Figure 6 This is an appendix to the utility model Figure 1 A magnified view of part B in the middle.

[0020] Appendix Figure 7 This is a schematic diagram of the structure of the second bearing of this utility model.

[0021] Appendix Figure 8 This is a structural schematic diagram of the first bearing of this utility model.

[0022] The labels shown in the attached diagram: 1. Base; 2. Shaking box; 3. Material inlet; 4. First material outlet; 5. Screen hole; 6. Eccentric wheel; 7. Collection box; 8. Second material outlet; 9. Lever; 10. Arc groove; 11. Push block; 12. Horizontal groove; 13. First rotating shaft; 14. First gear; 15. Second rotating shaft; 16. Cam; 17. Rack; 18. Limiting wheel; 19. Limiting groove; 20. Limiting block; 21. Connecting block; 22. Turntable; 23. Arc block; 24. Inclined surface; 25. Fixing nut; 26. Return spring; 27. Rotary motor; 28. Second gear; 29. ​​Third gear; 30. Roller; 31. First bearing; 32. Second bearing; 33. Telescopic cylinder. Detailed Implementation

[0023] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0024] This utility model provides an automatic feeding and screening mechanism for a Raymond mill, such as... Figure 1 , Figure 2 and Figure 6 As shown, the device includes a base 1 and a shaking box 2 rotatably mounted on the base 1. The shaking box 2 is tilted on the base 1. The two ends of the shaking box 2 are respectively provided with a material inlet 3 and a first material outlet 4. The shaking box 2 is provided with a number of screen holes 5. A number of eccentric wheels 6 are rotatably connected to the screen holes 5. The bottom of the shaking box 2 is provided with a collection box 7 that communicates with the screen holes 5. The end of the collection box 7 is provided with a second material outlet 8. Through the screening of the screen holes 5, materials with larger particle sizes cannot pass through smoothly and will be discharged from the first material outlet 4 on the other side of the shaking box 2, returning to the previous stage of crushing machinery. This prevents materials with larger particle sizes from entering the Raymond mill and clogging the feed inlet of the Raymond mill, thereby further reducing the number of shutdowns for cleaning, reducing the labor intensity of the workers, and improving the production efficiency of the Raymond mill. Materials with the correct particle size will pass smoothly through the sieve hole 5 and enter the lower collecting box 7, where the materials will gather and slide out from the second material outlet 8 on the other side, entering the feed inlet of the Raymond mill below, thereby achieving secondary crushing of the coke gemstone and meeting the technical requirements of subsequent production processes. In addition, by rotating the eccentric wheel 6 on the shaking box 2, the size of the screen hole 5 can be adjusted to adapt to the material processing requirements under different conditions, ensuring that materials with qualified particle size enter the Raymond mill, while larger particles are returned to the next stage of crushing machinery, thereby further reducing the number of shutdowns for cleaning, reducing the labor intensity of workers, and improving the production efficiency of the Raymond mill. Preferred, such as Figure 1 , Figure 2 and Figure 6As shown, the shaking box 2 is provided with levers 9 at both ends, and the base 1 is provided with an arc-shaped groove 10 that slides in contact with the levers 9. A push block 11 is slidably connected to the base 1, and the push block 11 is provided with a transverse groove 12 that slides in contact with the levers 9. The material enters the shaking box 2 through the material inlet 3 on one side of the shaking box 2. The push block 11 slides back and forth on the base 1, and the transverse groove 12 on the push block 11 contacts the levers 9, causing the levers 9 to move back and forth. With the guidance of the arc-shaped groove 10, the shaking box 2 swings back and forth on the base 1. At the same time, due to the tilted setting of the shaking box 2, the material is further driven to continuously shake and move downward in the shaking box 2, avoiding the material with a large outer diameter from staying on the screen hole 5 for a long time, causing the screen hole 5 to be blocked, thereby reducing the number of times the machine needs to be stopped for cleaning, reducing the labor intensity of the workers, and improving the production efficiency of the Raymond mill.

[0025] Preferred, such as Figure 3 , Figure 4 and Figure 5 As shown, a first rotating shaft 13 connected to an eccentric wheel 6 is rotatably connected to the shaking box 2. A first gear 14 is provided at the end of the first rotating shaft 13. Several second rotating shafts 15 are rotatably connected to the shaking box 2. A cam 16 is provided at the end of each second rotating shaft 15. Racks 17 meshing with the first gears 14 are provided on both sides of each cam 16. By rotating the second rotating shafts 15 within the shaking box 2, the racks 17 on both sides of the cams 16 mesh with the first gears 14, simultaneously driving two of the first gears 14 to rotate. Torque is transmitted through the first rotating shaft 13, driving the eccentric wheel 6 to rotate, thereby adjusting... The size of the sieve aperture 5 adapts to the material processing needs under different conditions, ensuring that materials with qualified particle sizes enter the Raymond mill, while larger particles are returned to the previous stage of crushing machinery, further reducing the number of downtime cleanings, reducing the labor intensity of workers, and improving the production efficiency of the Raymond mill. In addition, by adjusting the ratio of the number of rotations of the cam 16 and the first gear 14, the transmission ratio of the second rotating shaft 15 and the first rotating shaft 13 can be adjusted, improving the accuracy of adjusting the rotation angle of the eccentric wheel 6, further improving the effect of screening material particle size, reducing the number of downtime cleanings, reducing the labor intensity of workers, and improving the production efficiency of the Raymond mill.

[0026] Preferred, such as Figure 3 , Figure 4 and Figure 5As shown, a limiting wheel 18 is keyed to the first rotating shaft 13. Several limiting grooves 19 are provided on both sides of the shaking box 2. Several limiting blocks 20 that slide in contact with the limiting grooves 19 are provided on one side of the limiting wheel 18. After adjusting the angle of the eccentric wheel 6 each time, the limiting wheel 18 slides on the first rotating shaft 13, so that several limiting blocks 20 provided on one side of the limiting wheel 18 slide into the limiting grooves 19. By the contact between the side of the limiting block 20 and the limiting groove 19, the limiting wheel 18 is restricted from rotating relative to the shaking box 2. At the same time, since the first rotating shaft 13 is keyed to the limiting wheel 18, the rotation of the first rotating shaft 13 in the shaking box 2 is restricted, avoiding unintentional rotation of the eccentric wheel 6 by external force, changing the size of the screen hole 5, further improving the effect of screening material particle size, reducing the number of shutdowns for cleaning, reducing the labor intensity of workers, and improving the production efficiency of Raymond mill.

[0027] Preferred, such as Figure 3 , Figure 4 and Figure 5 As shown, a connecting block 21 is provided between two adjacent limiting wheels 18. A turntable 22 is provided on the second rotating shaft 15. Arc-shaped blocks 23 are provided on both sides of the turntable 22. An inclined surface 24 that contacts the connecting block 21 is provided on both sides of the arc-shaped blocks 23. A fixing nut 25 is provided on the first rotating shaft 13. A return spring 26 is provided between the fixing nut 25 and the limiting wheel 18. When it is necessary to adjust the angle of the eccentric wheel 6, the second rotating shaft 15 is driven to rotate on the shaking box 2, which simultaneously drives the cam 16 and the turntable 22 to rotate on the shaking box 2. Before the racks 17 on both sides of the cam 16 mesh with the first gear 14, the arc-shaped blocks 23 on both sides of the turntable 22 first engage with the connecting block 21. When block 21 contacts the connecting block 21, the inclined surface 24 on the arc-shaped block 23 contacts the connecting block 21. The resulting force causes the connecting block 21 and the limiting wheel 18 to slide together, so that the limiting block 20 on one side of the limiting wheel 18 slides out of the limiting groove 19, releasing the restriction on the rotation of the first rotating shaft 13. Then, the rack 17 meshes with the first gear 14, driving the eccentric wheel 6 to rotate, thereby adjusting the size of the screen hole 5 to adapt to the material processing requirements under different conditions. This ensures that materials with qualified particle size enter the Raymond mill, while larger particles are returned to the previous stage of crushing machinery, further reducing the number of shutdowns for cleaning, reducing the labor intensity of workers, and improving the production efficiency of the Raymond mill.

[0028] Preferred, such as Figure 5 As shown, it also includes a rotary motor 27 mounted on the shaking box 2. The movable end of the rotary motor 27 is provided with a second gear 28, and the second rotating shaft 15 is provided with a third gear that meshes with the second gear 28 to provide power for the rotation of the eccentric wheel 6.

[0029] Preferred, such as Figure 6 and Figure 8As shown, the end of the lever 9 is provided with a roller 30 that contacts the arc groove 10, which reduces the friction between the shaking box 2 and the base 1 and ensures the smoothness of the reciprocating movement of the shaking box 2.

[0030] Preferred, such as Figure 7 and Figure 8 As shown, a first bearing 31 and a second bearing 32 are respectively provided between the roller 30 and the lever 9, and between the base 1 and the shaking box 2, to reduce the friction between the shaking box 2 and the base 1 and ensure the smooth reciprocating movement of the shaking box 2.

[0031] Preferred, such as Figure 6 As shown, the base 1 is provided with a telescopic cylinder 33. The movable end of the telescopic cylinder 33 is connected to the push block 11. By reciprocating the telescopic cylinder 33, the push block 11 is driven to move back and forth, thereby realizing the reciprocating shaking of the shaking box 2.

[0032] Example 1 This utility model provides an automatic feeding and screening mechanism for a Raymond mill, such as... Figure 1 , Figure 2 and Figure 6 As shown, the material enters the shaking box 2 through the material inlet 3 on one side of the shaking box 2. The push block 11 slides back and forth on the base 1. The push block 11 has a horizontal groove 12 that contacts the lever 9, causing the lever 9 to move back and forth. With the help of the arc groove 10 guiding the lever 9, the shaking box 2 swings back and forth on the base 1. At the same time, due to the tilting setting of the shaking box 2, the material is further driven to continuously shake and move down in the shaking box 2, avoiding the material with a large outer diameter from staying on the screen hole 5 for a long time, causing the screen hole 5 to be blocked. This reduces the number of times the machine needs to be stopped for cleaning, reduces the labor intensity of the workers, and improves the production efficiency of the Raymond mill. At the same time, the screening through the screen hole 5 prevents larger particles from passing through smoothly. They will be discharged from the first material outlet 4 on the other side of the shaking box 2 and returned to the upper-level crushing machinery. This prevents larger particles from entering the Raymond mill and clogging the feed inlet of the Raymond mill, thereby further reducing the number of shutdowns for cleaning, reducing the labor intensity of the workers, and improving the production efficiency of the Raymond mill. Materials with the correct particle size will pass smoothly through the sieve hole 5 and enter the lower collecting box 7, where the materials will gather and slide out from the second material outlet 8 on the other side, entering the feed inlet of the Raymond mill below, thereby achieving secondary crushing of the coke gemstone and meeting the technical requirements of subsequent production processes. In addition, by rotating the eccentric wheel 6 on the shaking box 2, the size of the screen hole 5 can be adjusted to adapt to the material processing requirements under different conditions, ensuring that materials with qualified particle size enter the Raymond mill, while larger particles are returned to the previous stage of crushing machinery, thereby further reducing the number of shutdowns for cleaning, reducing the labor intensity of workers, and improving the production efficiency of the Raymond mill.

[0033] Example 2 Based on Example 1, such as Figures 3-6 As shown, when the size of the sieve hole 5 needs to be adjusted, the second gear 28 is driven to rotate by the rotary motor 27. The torque is transmitted through the third gear and the second rotating shaft 15, which drives the cam 16 and the turntable 22 to rotate on the shaking box 2. Before the racks 17 on both sides of the cam 16 mesh with the first gear 14, the arc-shaped blocks 23 on both sides of the turntable 22 first contact the connecting block 21. The inclined surface 24 on the arc-shaped block 23 contacts the connecting block 21, and the resulting force causes the connecting block 21 and the limiting wheel 18 to slide together, so that the limiting block 20 on one side of the limiting wheel 18... Sliding out of the limiting groove 19, the first rotating shaft 13 is released from the restriction on rotation. Then, the racks 17 on both sides of the cam 16 mesh with the first gear 14, driving two of the first gears 14 to rotate. The torque is transmitted through the first rotating shaft 13, driving the eccentric wheel 6 to rotate, thereby adjusting the size of the screen hole 5 to adapt to the material processing needs under different conditions. This ensures that materials with qualified particle size enter the Raymond mill, while larger particles are returned to the previous stage of crushing machinery, further reducing the number of shutdowns for cleaning, reducing the labor intensity of workers, and improving the production efficiency of the Raymond mill. In addition, by adjusting the ratio of the number of cycles of the cam 16 and the first gear 14, the transmission ratio of the second rotating shaft 15 and the first rotating shaft 13 can be adjusted, thereby improving the accuracy of adjusting the rotation angle of the eccentric wheel 6, further improving the effect of screening material particle size, reducing the number of shutdowns for cleaning, reducing the labor intensity of workers, and improving the production efficiency of the Raymond mill. Furthermore, after each adjustment of the eccentric wheel 6 angle, the arc-shaped blocks 23 on both sides of the turntable 22 no longer contact the connecting block 21, releasing the restriction on the sliding of the limiting wheel 18 on the first rotating shaft 13. Under the action of the return spring 26, the limiting wheel 18 is driven to slide on the first rotating shaft 13, causing several limiting blocks 20 on one side of the limiting wheel 18 to slide into the limiting groove 19. Through the contact between the side of the limiting block 20 and the limiting groove 19, the limiting wheel 18 is restricted from rotating relative to the shaking box 2. At the same time, since the first rotating shaft 13 is keyed to the limiting wheel 18, the first rotating shaft 13 is restricted from rotating in the shaking box 2, preventing external forces from unintentionally rotating the eccentric wheel 6 and changing the size of the screen hole 5, further improving the effect of screening material particle size, reducing the number of shutdowns for cleaning, reducing the labor intensity of workers, and improving the production efficiency of Raymond mill. At the same time, there is no need to set up a separate power unit to restrict the rotation of the first rotating shaft 13, further reducing the space required for power unit installation and the cost of manufacturing.

Claims

1. An automatic feeding and screening mechanism for a Raymond mill, comprising a base (1) and a shaking box (2) rotatably mounted on the base (1), the shaking box (2) being inclinedly mounted on the base (1), characterized in that: The shaking box (2) has a material inlet (3) and a first material outlet (4) at both ends. The shaking box (2) has several sieve holes (5). Several eccentric wheels (6) are rotatably connected to the sieve holes (5). The bottom of the shaking box (2) has a collection box (7) connected to the sieve holes (5). The end of the collection box (7) has a second material outlet (8). The two ends of the shaking box (2) have levers (9). The base (1) has an arc groove (10) that slides in contact with the levers (9). The base (1) has a push block (11) that slides in contact with the levers (9). The push block (11) has a transverse groove (12) that slides in contact with the levers (9).

2. The automatic feeding and screening mechanism for a Raymond mill according to claim 1, characterized in that: The shaking box (2) is rotatably connected to a first rotating shaft (13) connected to an eccentric wheel (6). The end of the first rotating shaft (13) is provided with a first gear (14). The shaking box (2) is rotatably connected to several second rotating shafts (15). The end of the second rotating shaft (15) is provided with a cam (16). The two sides of the cam (16) are respectively provided with racks (17) that mesh with the first gear (14).

3. An automatic feeding and screening mechanism for a Raymond mill according to claim 2, characterized in that: The first rotating shaft (13) is keyed to a limiting wheel (18), and the two sides of the shaking box (2) are provided with several limiting grooves (19). The side of the limiting wheel (18) is provided with several limiting blocks (20) that slide in contact with the limiting grooves (19).

4. An automatic feeding and screening mechanism for a Raymond mill according to claim 3, characterized in that: A connecting block (21) is provided between two adjacent limiting wheels (18), a turntable (22) is provided on the second rotating shaft (15), an arc-shaped block (23) is provided on both sides of the turntable (22), and an inclined surface (24) that contacts the connecting block (21) is provided on both sides of the arc-shaped block (23), a fixing nut (25) is provided on the first rotating shaft (13), and a return spring (26) is provided between the fixing nut (25) and the limiting wheel (18).

5. An automatic feeding and screening mechanism for a Raymond mill according to claim 2, characterized in that: It also includes a rotary motor (27) mounted on the shaking box (2), the movable end of the rotary motor (27) is provided with a second gear (28), and the second rotating shaft (15) is provided with a third gear (29) that meshes with the second gear (28).

6. An automatic feeding and screening mechanism for a Raymond mill according to claim 1, characterized in that: The end of the lever (9) is provided with a roller (30) that contacts the arc groove (10).

7. An automatic feeding and screening mechanism for a Raymond mill according to claim 6, characterized in that: A first bearing (31) and a second bearing (32) are respectively provided between the roller (30) and the lever (9) and between the base (1) and the shaking box (2).

8. An automatic feeding and screening mechanism for a Raymond mill according to claim 1, characterized in that: The base (1) is provided with a telescopic cylinder (33), and the movable end of the telescopic cylinder (33) is connected to the push block (11).

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