Annular permanent magnet gearless ball mill

Abstract

The invention belongs to the technical field of ball mills, and discloses an annular permanent magnet gearless ball mill which comprises a base, two groups of oppositely distributed bearing seats are fixedly mounted on the surface of the base, a barrel is rotatably mounted between the two groups of bearing seats, and a plurality of groups of lining plates are fixedly mounted on the inner side wall of the barrel. A protection mechanism is arranged on the surface of the annular permanent magnet direct drive motor and comprises a dustproof assembly and a cleaning assembly, a plurality of sets of positioning holes distributed side by side are formed in the surface of the lining plate, a control mechanism is arranged in an inner cavity of the barrel and comprises a magnetic block, and the positioning assembly is used for releasing the assembly. Through mutual cooperation of the positioning assembly and the releasing assembly, the relative position of the magnetic block and the positioning hole can be automatically adjusted, then the relative position of the grinding ball and the lining plate can be automatically adjusted, the lining plate can drive the grinding ball to rotate to the top in the cylinder, and the grinding ball is controlled to freely fall at the top in the cylinder; and the crushing effect of the grinding balls on the materials in the inner cavity of the barrel is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of ball mill technology, specifically a ring-shaped permanent magnet gearless ball mill. Background Technology

[0002] Ball mills are crucial equipment for further pulverizing materials after they have been crushed. They are widely used in industries such as cement, silicate products, new building materials, refractory materials, fertilizers, ferrous and non-ferrous metal ore beneficiation, and glass and ceramics production, for dry or wet grinding of various ores and other grindable materials. As a primary grinding equipment, the ball mill plays an irreplaceable role in the entire mineral processing technology.

[0003] A ball mill consists of a horizontal cylindrical body, hollow inlet and outlet shafts, and grinding heads. The cylindrical body, made of steel plate with wear-resistant liners, is fixed to the body and contains grinding media. The grinding media are typically steel spheres. Material is fed into the cylindrical body through the hollow inlet shaft. As the mill rotates, the grinding media, due to inertia, centrifugal force, and friction, adhere to the cylindrical liner and are carried away by the mill. When carried to a certain height, they are thrown back down due to their own gravity, breaking up the material inside the mill like projectiles. Some material and grinding media also slide down the inner wall of the mill. During this process, the material and grinding media rub against each other, completing the grinding process.

[0004] Existing ball mills using ring-shaped permanent magnet direct drive motors lack necessary protective measures on the outside of the motor, resulting in a gap between the motor and the mill body. External dust and impurities can easily pass through this gap and enter the motor, affecting the normal operation of the equipment. Furthermore, when the mill rotates and moves the material and grinding media within the mill cavity, the material and grinding media can only repeatedly slide down the lower half of the cavity. The grinding media cannot move to the highest position within the mill cavity, resulting in poor crushing effect on the material during their free fall. Summary of the Invention

[0005] The purpose of this invention is to provide a ring-shaped permanent magnet gearless ball mill to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A ring-shaped permanent magnet gearless ball mill includes a base. Two sets of opposing bearing seats are fixedly mounted on the surface of the base. A cylinder is rotatably mounted between the two sets of bearing seats. Multiple grinding balls made of magnetic material are placed inside the cylinder. A ring-shaped permanent magnet direct-drive motor connected to the cylinder is disposed on the surface of the base. Multiple sets of equally spaced ring-shaped liners are fixedly mounted on the inner wall of the cylinder. A protective mechanism is provided on the surface of the ring-shaped permanent magnet direct-drive motor, including a dustproof component and a cleaning component. The dustproof component is disposed on both sides of the ring-shaped permanent magnet direct-drive motor to seal the gap between the motor and the cylinder. The cleaning component is disposed below the cylinder. The cleaning component is connected to the dustproof component and is used to clean the dust generated by the dustproof component. The surface of the liner plate has multiple sets of parallel positioning holes, each consisting of a placement cavity and a through hole. The placement cavity is located on one side wall of the liner plate, and the through hole is located on the other side wall of the liner plate and communicates with the placement cavity. The inner cavity of the cylinder is equipped with a control mechanism that cooperates with the grinding ball. The control mechanism includes a magnetic block, a positioning component, and a release component. The positioning component is located on the surface of the liner plate and is connected to the magnetic block. The positioning component is used to control the magnetic block to be stably positioned in the through hole. The release component is located on the surface of the cylinder and is connected to the positioning component. The release component is used to adjust the relative position of the magnetic block and the through hole.

[0007] As a further aspect of the present invention: the dustproof component includes annular protective covers fixedly installed on both sides of the annular permanent magnet direct drive motor, the side of the protective cover away from the annular permanent magnet direct drive motor being in contact with the surface of the cylinder, and annular filter screens fixedly installed on the surface of the cylinder, the filter screens being disposed in the inner cavity of the protective cover.

[0008] As a further aspect of the present invention: the cleaning component includes two sets of oppositely distributed cleaning rods rotatably mounted on the bottom wall of the inner side of the protective cover. The two sets of cleaning rods are respectively located on both sides of the filter screen. Multiple sets of cleaning brushes are provided on the surface of the cleaning rods. A guide toothed disc is fixedly mounted on the surface of the cleaning rods. An annular guide toothed ring is fixedly mounted on the surface of the cylinder. The guide toothed disc and the guide toothed ring are meshed and connected.

[0009] As a further aspect of the present invention: the positioning assembly includes multiple sets of positioning rods fixedly installed on the side wall of the liner, the multiple sets of positioning rods are slidably mounted on a bearing plate, the magnetic block is fixedly installed on the surface of the bearing plate, an end plate is fixedly installed on the end of the positioning rod away from the liner, a compression spring is fixedly installed on the surface of the end plate, and the extension end of the compression spring surrounds the outside of the positioning rod and is connected to the bearing plate.

[0010] As a further aspect of the present invention: the release assembly includes multiple sets of traction cables fixedly installed on the side wall of the bearing plate, the end of the traction cable away from the bearing plate extends to the outside of the cylinder and is fixedly installed with a control bar, the control bar being made of magnetic material, and a U-shaped rod being fixedly installed at the top of two sets of bearing seats, the middle of the U-shaped rod being fixedly installed with a magnetic strip.

[0011] As a further aspect of the present invention: multiple sets of guide rods are fixedly installed on the surface of the cylinder, and the control bar is slidably connected to the guide rods.

[0012] As a further embodiment of the present invention, a limiting plate is fixedly installed at the end of the guide rod away from the side wall of the cylinder.

[0013] As a further aspect of the present invention: multiple sets of brackets are fixedly installed on the side wall of the liner, and a positioning wheel is rotatably installed at the end of the bracket away from the liner, and the traction cable passes through the surface of the positioning wheel.

[0014] As a further embodiment of the present invention: the bottom end of the protective cover is provided with a drain outlet located outside the cleaning rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are: by setting up dustproof components and cleaning components to cooperate with each other, the gap between the annular permanent magnet direct drive motor and the cylinder can be sealed and protected, and dust in the air can be filtered and cleaned, effectively preventing dust from drifting into the interior of the annular permanent magnet direct drive motor. This solves the problem that there is currently a gap between the permanent magnet direct drive motor and the cylinder, and external dust and impurities can easily pass through the gap and drift into the interior of the permanent magnet direct drive motor, affecting the normal use of the equipment.

[0016] By setting the positioning component and the release component to work together, the relative position of the magnetic block and the positioning hole can be automatically adjusted, which in turn can automatically adjust the relative position of the grinding ball and the liner. The liner can drive the grinding ball to rotate to the top of the cylinder, and control the grinding ball to fall freely from the top of the cylinder, which effectively improves the crushing effect of the grinding ball on the material in the cylinder cavity. This solves the problem that the grinding body cannot move to the highest position in the cylinder cavity and the crushing effect of the grinding body on the material is poor during the free fall process. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a ring-shaped permanent magnet gearless ball mill provided in an embodiment of the present invention. Figure 1 .

[0018] Figure 2 This is a three-dimensional structural diagram of a ring-shaped permanent magnet gearless ball mill provided in an embodiment of the present invention. Figure 2 .

[0019] Figure 3This is a schematic diagram of the main structure of a ring-shaped permanent magnet gearless ball mill provided in an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the control mechanism in a ring-shaped permanent magnet gearless ball mill provided in an embodiment of the present invention.

[0021] Figure 5 This is a schematic internal cross-sectional view of the cylinder of a ring-shaped permanent magnet gearless ball mill provided in an embodiment of the present invention. Figure 1 .

[0022] Figure 6 This is a schematic internal cross-sectional view of the cylinder of a ring-shaped permanent magnet gearless ball mill provided in an embodiment of the present invention. Figure 2 .

[0023] Figure 7 This is a schematic diagram of the structure of a protective cover in a ring-shaped permanent magnet gearless ball mill provided in an embodiment of the present invention.

[0024] Figure 8 for Figure 3 A magnified structural diagram of A in the diagram.

[0025] Figure 9 This is a schematic diagram of a liner and its connection structure in a ring-shaped permanent magnet gearless ball mill, provided in an embodiment of the present invention. Figure 1 .

[0026] Figure 10 This is a schematic diagram of a liner and its connection structure in a ring-shaped permanent magnet gearless ball mill, provided in an embodiment of the present invention. Figure 2 .

[0027] Figure 11 This is a schematic diagram of the support plate and its connection structure in a ring-shaped permanent magnet gearless ball mill provided in an embodiment of the present invention.

[0028] Figure 12 This is a schematic diagram of the magnetic strip and its connection structure in a ring-shaped permanent magnet gearless ball mill provided in an embodiment of the present invention.

[0029] The components are as follows: 1-base, 2-bearing seat, 3-cylinder, 4-ring permanent magnet direct drive motor, 5-protective mechanism, 51-dustproof component, 511-protective cover, 512-filter screen, 52-cleaning component, 521-cleaning rod, 522-cleaning brush, 523-guide toothed disc, 524-guide toothed ring, 6-liner, 61-positioning hole, 611-placement cavity, 612-through hole, 7-control mechanism, 71-magnetic block, 72-positioning component, 721-positioning rod, 722-end plate, 723-compression spring, 724-bearing plate, 73-release component, 731-traction cable, 732-control bar, 733-U-shaped rod, 734-magnetic bar, 8-guide rod, 9-limiting plate, 10-bracket, 11-positioning wheel, 12-guide outlet. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0031] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 10The diagram shows a structural representation of a ring-shaped permanent magnet gearless ball mill according to an embodiment of the present invention. It includes a base 1, on which two sets of opposing bearing seats 2 are fixedly mounted. A cylinder 3 is rotatably mounted between the two sets of bearing seats 2. Multiple grinding balls made of magnetic material are placed inside the cylinder 3. A ring-shaped permanent magnet direct-drive motor 4 connected to the cylinder 3 is mounted on the surface of the base 1. Multiple sets of equally spaced ring-shaped liner plates 6 are fixedly mounted on the inner wall of the cylinder 3. A protective mechanism 5 is provided on the surface of the ring-shaped permanent magnet direct-drive motor 4. The protective mechanism 5 includes a dustproof component 51 and a cleaning component 52. The dustproof component 51 is located on both sides of the ring-shaped permanent magnet direct-drive motor 4 and is used to seal the gap between the ring-shaped permanent magnet direct-drive motor 4 and the cylinder 3 for dust prevention. The cleaning component 52 is located below the cylinder 3 and is connected to the dustproof component 52. The cleaning component 52 is connected to the dust filter 51 and is used to clean the dust generated by the dust filter 51. The surface of the liner plate 6 has multiple sets of parallel positioning holes 61. The positioning holes 61 are composed of a placement cavity 611 and a through hole 612. The placement cavity 611 is opened on one side wall of the liner plate 6, and the through hole 612 is opened on the other side wall of the liner plate 6 and communicates with the placement cavity 611. The inner cavity of the cylinder 3 is provided with a control mechanism 7 that cooperates with the grinding ball. The control mechanism 7 includes a magnetic block 71, a positioning component 72 and a release component 73. The positioning component 72 is located on the surface of the liner plate 6 and is connected to the magnetic block 71. The positioning component 72 is used to control the magnetic block 71 to be stably positioned in the through hole 612. The release component 73 is located on the surface of the cylinder 3 and is connected to the positioning component 72. The release component 73 is used to adjust the relative position of the magnetic block 71 and the through hole 612.

[0033] A batch of grinding balls is placed inside the cylinder 3. During use, the material to be pulverized is fed into the cylinder 3. The annular permanent magnet direct drive motor 4 drives the cylinder 3 to rotate between two sets of bearing seats 2. As the cylinder 3 rotates, the material and grinding balls mix within the cylinder 3. The material and grinding balls repeatedly slide down the inner wall of the cylinder during rotation. In this process, the material repeatedly rubs against the grinding balls, achieving efficient pulverization and refining. During operation, the dustproof component 51 continuously seals the gap between the annular permanent magnet direct drive motor 4 and the cylinder 3, effectively preventing external dust from entering the motor and affecting normal operation. Simultaneously, the cleaning component 52 automatically processes and discharges the filtered dust. During the crushing and refining of materials, the cylinder 3 drives multiple sets of liners 6 to rotate synchronously. The positioning component 72 positions the magnetic block 71 on the surface of the liner 6, and the magnetic block 71 is stably positioned within the through hole 612. During the rotation of the liner 6, some grinding balls fall into the placement cavity 611 on the surface of the liner 6. At this time, the magnetic block 71 fixes the grinding balls stably in the placement cavity 611 through magnetic attraction. As the liner 6 rotates upward with the cylinder 3, it carries the grinding balls in the placement cavity 611 upward synchronously. When the liner 6 rotates to the highest position in the inner cavity of the cylinder 3, the release component 73 and the positioning component 72 cooperate to control the magnetic block 71 to move outward from the liner 6. At this time, the magnetic block 71 releases the restriction on the grinding balls in the placement cavity 611, and the grinding balls fall freely from the surface of the liner 6. The falling grinding balls, like projectiles, can crush the materials in the cylinder. Because the grinding balls fall freely at the highest position in the inner cavity of the cylinder 3, the gravitational potential energy carried by the grinding balls is relatively large, which can effectively improve the crushing and refining effect of the materials. After the grinding balls on the surface of the liner 6 fall down, the cylinder 3 drives the liner 6 to rotate continuously. At this time, the positioning component 72 controls the magnetic block 71 to move into the through hole 612 again. The liner 6 continues to rotate, which can control the grinding balls to fall repeatedly from the highest position inside the cylinder 3, effectively improving the grinding and refining efficiency of the material.

[0034] like Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, in a preferred embodiment of the present invention, the dustproof component 51 includes annular protective covers 511 fixedly installed on both sides of the annular permanent magnet direct drive motor 4. The side of the protective cover 511 away from the annular permanent magnet direct drive motor 4 is attached to the surface of the cylinder 3. An annular filter screen 512 is fixedly installed on the surface of the cylinder 3. The filter screen 512 is disposed in the inner cavity of the protective cover 511.

[0035] The annular permanent magnet direct drive motor 4 positions the protective cover 511, and the cylinder 3 positions the filter screen 512. The filter screen 512 is located inside the protective cover 511. The protective covers 511 on both sides can initially seal and protect the gap between the annular permanent magnet direct drive motor 4 and the cylinder 3. When a small amount of dust passes through the protective cover 511 and drifts into the inner cavity of the protective cover 511, the filter screen 512 can further screen and filter the dust in the inner cavity of the protective cover 511. The dust will adhere to the surface of the filter screen 512, effectively preventing the dust from drifting into the interior of the annular permanent magnet direct drive motor 4. When the cylinder 3 rotates, it drives the filter screen 512 to rotate synchronously. The cleaning component 52 at the bottom inside the protective cover 511 can automatically clean the dust adhering to the surface of the filter screen 512, effectively improving the continuous filtration and dust removal effect of the filter screen 512.

[0036] like Figure 3 , Figure 7 , Figure 8 As shown, in a preferred embodiment of the present invention, the cleaning component 52 includes two sets of oppositely distributed cleaning rods 521 rotatably mounted on the inner bottom wall of the protective cover 511. The two sets of cleaning rods 521 are respectively located on both sides of the filter screen 512. Multiple sets of cleaning brushes 522 are provided on the surface of the cleaning rods 521. A guide toothed disc 523 is fixedly installed on the surface of the cleaning rods 521. An annular guide toothed ring 524 is fixedly installed on the surface of the cylinder 3. The guide toothed disc 523 and the guide toothed ring 524 are meshed and connected.

[0037] The protective cover 511 positions the cleaning rod 521, which in turn positions the cleaning brush 522. When the cylinder 3 rotates, it drives the guide gear ring 524 to rotate synchronously. The guide gear ring 524 meshes with the guide gear disc 523, which in turn drives the cleaning rod 521 to rotate around its own axis. The cleaning rod 521 drives the cleaning brush 522 to rotate synchronously. When the cleaning brush 522 rotates, it can efficiently clean the dust attached to the surface of the filter screen 512. The cleaned dust falls to the bottom of the protective cover 511, and the filter screen 512 can continuously filter the dust in the air.

[0038] like Figure 4 , Figure 5 , Figure 9 , Figure 11 As shown, in a preferred embodiment of the present invention, the positioning component 72 includes multiple sets of positioning rods 721 fixedly installed on the side wall of the liner 6. The multiple sets of positioning rods 721 are slidably mounted on a support plate 724. The magnetic block 71 is fixedly installed on the surface of the support plate 724. An end plate 722 is fixedly installed at the end of the positioning rod 721 away from the liner 6. A compression spring 723 is fixedly installed on the surface of the end plate 722. The telescopic end of the compression spring 723 surrounds the outside of the positioning rod 721 and is connected to the support plate 724.

[0039] Multiple positioning rods 721 position the support plate 724 at the side wall of the liner 6. The support plate 724 positions the magnetic block 71, which is distributed opposite to the through hole 612. Initially, the compression spring 723 applies a pushing force to the support plate 724, causing the support plate 724 to adhere to the side wall of the liner 6. At this time, the magnetic block 71 on the surface of the support plate 724 is stably positioned within the through hole 612, with one end of the magnetic block 71 extending into the placement cavity 611 away from the support plate 724. After the grinding ball moves into the placement cavity 611, the magnetic block 71 uses magnetic attraction to stably fix the grinding ball within the placement cavity 611. When the liner 6 rotates to its highest position, the release assembly 73 controls the support plate 724 to move away from the liner 6. The support plate 724 drives the magnetic block 71 to move synchronously, at which point the magnetic block 71 separates from the grinding ball in the placement cavity 611, and the grinding ball falls freely from the surface of the liner 6.

[0040] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 9 , Figure 12 As shown, in a preferred embodiment of the present invention, the release assembly 73 includes multiple sets of traction cables 731 fixedly installed on the side wall of the bearing plate 724. The end of the traction cable 731 away from the bearing plate 724 extends to the outside of the cylinder 3 and is fixedly installed with a control bar 732. The control bar 732 is made of magnetic material. The top ends of the two sets of bearing seats 2 are fixedly installed with a U-shaped rod 733, and a magnetic strip 734 is fixedly installed in the middle of the U-shaped rod 733.

[0041] Two sets of bearing seats 2 position the U-shaped rod 733, which in turn positions the magnetic strip 734. The traction cable 731 positions the control strip 732. The control strip 732 is stably positioned on the outer wall of the cylinder 3. As the cylinder 3 rotates, it drives the control strip 732 to rotate synchronously. When the control strip 732 rotates to its highest position, it and the magnetic strip 734 are in contact, forming a single unit through magnetic attraction. As the cylinder 3 continues to rotate, the control strip 732 and the magnetic strip 734 remain relatively stationary. At this time, the traction cable 731 pulls the bearing plate 724 to move away from the liner plate 6. When the bearing plate 724 reaches its limit position, the cylinder 3 continues to rotate. At this time, the traction cable 731 pulls the control strip 732, causing it to separate from the magnetic strip 734. The compression spring 723 pushes the bearing plate 724 to re-adhere to the side wall of the liner plate 6.

[0042] like Figure 2 , Figure 5 , Figure 9As shown, in a preferred embodiment of the present invention, multiple sets of guide rods 8 are fixedly installed on the surface of the cylinder 3, and the control bar 732 is slidably connected to the guide rods 8.

[0043] When the control bar 732 and the magnetic bar 734 remain relatively stationary and the cylinder 3 rotates, the control bar 732 slides relative to the guide rod 8. When the magnetic bar 734 separates from the control bar 732, the control bar 732 slides back to its original position along the surface of the guide rod 8. The guide rod 8 can effectively improve the stability of the control bar 732 during sliding.

[0044] like Figure 2 , Figure 5 , Figure 9 As shown, in a preferred embodiment of the present invention, a limiting plate 9 is fixedly installed at the end of the guide rod 8 away from the side wall of the cylinder 3.

[0045] like Figure 5 , Figure 9 As shown, in a preferred embodiment of the present invention, multiple sets of brackets 10 are fixedly installed on the side wall of the liner 6. A positioning wheel 11 is rotatably installed at the end of the bracket 10 away from the liner 6, and the traction cable 731 passes through the surface of the positioning wheel 11. The brackets 10 support and position the positioning wheel 11, and the positioning wheel 11 can effectively reduce the wear of the traction cable 731.

[0046] like Figure 7 As shown, in a preferred embodiment of the present invention, the bottom end of the protective cover 511 is provided with a drain port 12 located outside the cleaning rod 521.

[0047] After the cleaning brush 522 cleans the dust on the surface of the filter screen 512, the cleaned dust can be automatically discharged to the outside of the protective cover 511 through the guide port 12.

[0048] The working principle of this invention is as follows: A batch of grinding balls are placed in the inner cavity of the cylinder 3. When in use, the material to be pulverized and refined is put into the inner cavity of the cylinder 3. The annular permanent magnet direct drive motor 4 drives the cylinder 3 to rotate between two sets of bearing seats 2. When the cylinder 3 rotates, it drives the material and grinding balls to mix in the inner cavity of the cylinder 3. When the cylinder 3 rotates, it drives the material and grinding balls to slide repeatedly along the inner side wall of the cylinder. In this process, the material and grinding balls rub repeatedly, which can efficiently pulverize and refine the material.

[0049] When the annular permanent magnet direct drive motor 4 is working, the protective covers 511 on both sides can initially seal and protect the gap between the annular permanent magnet direct drive motor 4 and the cylinder 3. When a small amount of dust passes through the protective cover 511 and drifts into the inner cavity of the protective cover 511, the filter screen 512 can further screen and filter the dust in the inner cavity of the protective cover 511. The dust will adhere to the surface of the filter screen 512, effectively preventing the dust from drifting into the interior of the annular permanent magnet direct drive motor 4. When the cylinder 3 rotates, it drives the guide gear ring 524 to rotate synchronously. The guide gear ring 524 meshes with the guide gear disc 523, which can drive the cleaning rod 521 to rotate around its own axis. The cleaning rod 521 drives the cleaning brush 522 to rotate synchronously. When the cleaning brush 522 rotates, it can efficiently clean the dust attached to the surface of the filter screen 512. The cleaned dust falls to the bottom of the inner cavity of the protective cover 511. The filter screen 512 can continuously filter the dust in the air. The cleaned-up dust can be automatically discharged to the outside of the protective cover 511 through the drain port 12.

[0050] When the material is crushed and refined, the cylinder 3 drives multiple sets of liners 6 to rotate synchronously. Multiple sets of positioning rods 721 position the bearing plate 724 at the side wall of the liner 6. The bearing plate 724 positions the magnetic block 71. The magnetic block 71 is distributed opposite to the through hole 612. Initially, the compression spring 723 applies a pushing force to the bearing plate 724, and the bearing plate 724 is in contact with the side wall of the liner 6. At this time, the magnetic block 71 on the surface of the bearing plate 724 is stably located in the through hole 612, and the end of the magnetic block 71 away from the bearing plate 724 extends into the placement cavity 611. During the rotation of the liner 6, some grinding balls fall into the placement cavity 611 on the surface of the liner 6. At this time, the magnetic block 71 uses magnetic attraction to stably fix the grinding balls in the placement cavity 611. As the liner 6 rotates upward with the cylinder 3, it moves the grinding balls in the placement cavity 611 upward synchronously. When the liner 6 rotates to its highest position inside the cylinder 3, the control strip 732 and the magnetic strip 734 come into contact with each other. The magnetic strip 734 is connected to the control strip 732 as a whole by magnetic attraction. As the cylinder 3 continues to rotate, the control strip 732 and the magnetic strip 734 remain relatively stationary. At this time, the traction cable 731 pulls the bearing plate 724 to move away from the liner 6. The bearing plate 724 drives the magnetic block 71 to move synchronously. At this time, the magnetic block 71 separates from the grinding balls in the placement cavity 611, and the grinding balls fall freely from the surface of the liner 6. The falling grinding balls, like projectiles, can crush the material inside the cylinder. Because the grinding balls fall freely from the highest position inside the cylinder 3, they carry a large gravitational potential energy, which can effectively improve the grinding and refining effect on the material. After the grinding balls on the surface of the liner 6 fall, the cylinder 3 drives the liner 6 to rotate continuously. At this time, the magnetic block 71 moves into the through hole 612 again, and the liner 6 continues to rotate. This can control the grinding balls to fall repeatedly from the highest position inside the cylinder 3, effectively improving the grinding and refining efficiency of the material.

[0051] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A ring-shaped permanent magnet gearless ball mill, comprising a base (1), wherein two sets of oppositely distributed bearing seats (2) are fixedly mounted on the surface of the base (1), and a cylinder (3) is rotatably mounted between the two sets of bearing seats (2), wherein a plurality of grinding balls are placed in the inner cavity of the cylinder (3), the grinding balls being made of magnetic material, characterized in that, The base (1) is provided with an annular permanent magnet direct drive motor (4) connected to the cylinder (3), and multiple sets of liner plates (6) distributed in an annular and equally spaced manner are fixedly installed on the inner side wall of the cylinder (3). The surface of the annular permanent magnet direct drive motor (4) is provided with a protective mechanism (5), which includes a dustproof component (51) and a cleaning component (52). The dustproof component (51) is disposed on both sides of the annular permanent magnet direct drive motor (4). The dustproof component (51) is used to seal the gap between the annular permanent magnet direct drive motor (4) and the cylinder (3) for dust prevention. The cleaning component (52) is located below the cylinder (3) and connected to the dustproof component (51). The cleaning component (52) is used to clean the dust generated by the dustproof component (51). The liner (6) has multiple sets of parallel positioning holes (61) on its surface. Each positioning hole (61) consists of a placement cavity (611) and a through hole (612). The placement cavity (611) is located on one side wall of the liner (6), and the through hole (612) is located on the other side wall of the liner (6) and is connected to the placement cavity (611). The inner cavity of the cylinder (3) is provided with a control mechanism (7) that cooperates with the grinding ball. The control mechanism (7) includes a magnetic block (71), a positioning component (72), and a release component (73). The positioning component (72) is located on the surface of the liner (6) and connected to the magnetic block (71). The positioning component (72) is used to control the magnetic block (71) to be stably positioned in the through hole (612). The release component (73) is located on the surface of the cylinder (3) and connected to the positioning component (72). The release component (73) is used to adjust the relative position of the magnetic block (71) and the through hole (612).

2. The annular permanent magnet gearless ball mill according to claim 1, characterized in that, The dustproof component (51) includes annular protective covers (511) fixedly installed on both sides of the annular permanent magnet direct drive motor (4). The side of the protective cover (511) away from the annular permanent magnet direct drive motor (4) is attached to the surface of the cylinder (3). Annular filter screen (512) is fixedly installed on the surface of the cylinder (3). The filter screen (512) is located in the inner cavity of the protective cover (511).

3. The annular permanent magnet gearless ball mill according to claim 2, characterized in that, The cleaning component (52) includes two sets of oppositely distributed cleaning rods (521) rotatably mounted on the inner bottom wall of the protective cover (511). The two sets of cleaning rods (521) are located on both sides of the filter screen (512). Multiple sets of cleaning brushes (522) are provided on the surface of the cleaning rods (521). A guide toothed disc (523) is fixedly installed on the surface of the cleaning rods (521). An annular guide toothed ring (524) is fixedly installed on the surface of the cylinder (3). The guide toothed disc (523) and the guide toothed ring (524) are meshed and connected.

4. The annular permanent magnet gearless ball mill according to claim 1, characterized in that, The positioning assembly (72) includes multiple positioning rods (721) fixedly installed on the side wall of the liner (6). The multiple positioning rods (721) are slidably installed on the bearing plate (724). The magnetic block (71) is fixedly installed on the surface of the bearing plate (724). An end plate (722) is fixedly installed on the end of the positioning rod (721) away from the liner (6). A compression spring (723) is fixedly installed on the surface of the end plate (722). The telescopic end of the compression spring (723) surrounds the outside of the positioning rod (721) and is connected to the bearing plate (724).

5. A ring-shaped permanent magnet gearless ball mill according to claim 4, characterized in that, The release assembly (73) includes multiple sets of traction cables (731) fixedly installed on the side wall of the support plate (724). The end of the traction cable (731) away from the support plate (724) extends to the outside of the cylinder (3) and is fixedly installed with a control bar (732). The control bar (732) is made of magnetic material. The top ends of the two sets of bearing seats (2) are fixedly installed with a U-shaped rod (733). A magnetic strip (734) is fixedly installed in the middle of the U-shaped rod (733).

6. A ring-shaped permanent magnet gearless ball mill according to claim 5, characterized in that, Multiple sets of guide rods (8) are fixedly installed on the surface of the cylinder (3), and the control bar (732) is slidably connected to the guide rods (8).

7. A ring-shaped permanent magnet gearless ball mill according to claim 6, characterized in that, A limit plate (9) is fixedly installed at one end of the guide rod (8) away from the side wall of the cylinder (3).

8. A ring-shaped permanent magnet gearless ball mill according to claim 5, characterized in that, Multiple sets of brackets (10) are fixedly installed on the side wall of the liner (6). A positioning wheel (11) is rotatably installed on one end of the bracket (10) away from the liner (6). The traction cable (731) passes through the surface of the positioning wheel (11).

9. A ring-shaped permanent magnet gearless ball mill according to claim 3, characterized in that, The bottom of the protective cover (511) is provided with a drain port (12) located outside the cleaning rod (521).

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