Grinding cylinder and grinding equipment

Abstract

This application discloses a grinding cylinder and a grinding device. The grinding cylinder includes a grinding cylinder body and an airtight seal. The grinding cylinder body is provided with a grinding chamber. The airtight seal is disposed at one end of the grinding cylinder body along the axial direction of the grinding cylinder. The airtight seal includes a first section and a second section, which are arranged along the circumferential direction of the grinding cylinder and are located above the second section. The first section is provided with a plurality of air guide holes communicating with the grinding chamber. Using the grinding cylinder of this application improves the discharge effect of the material being ground, prevents the material from being over-ground, and improves the quality of the material.

Description

Technical Field

[0001] This application relates to the field of material grinding technology, and in particular to a grinding cylinder and grinding equipment. Background Technology

[0002] Grinding equipment includes a driver, a stirrer, and a grinding cylinder. The grinding cylinder contains grinding media and materials. The driver drives the stirrer to agitate the grinding media and materials, causing relative motion between them, thereby grinding the materials. Existing grinding equipment also includes an air-blowing structure, which blows air into the grinding cylinder to expel the materials. However, the air-blowing holes in existing structures are evenly distributed along the circumference of the grinding cylinder. This results in the airflow from the holes located in the lower half of the grinding cylinder being difficult to use for auxiliary feeding due to the obstruction of the grinding media, leading to resource waste and reduced contact time between the materials and grinding media in the lower half of the grinding cylinder, thus affecting the fineness of the product. Summary of the Invention

[0003] In view of this, one object of this application is to provide a grinding cylinder and grinding equipment to solve the technical problems of the prior art where the air blowing holes of the air blowing structure are uniformly arranged along the circumference of the grinding cylinder, resulting in the airflow from the air blowing holes located in the lower half of the grinding cylinder being difficult to play an auxiliary feeding role due to the obstruction of the grinding medium, causing waste of resources and shortening the contact time between the material in the lower half of the grinding cylinder and the grinding medium, thus affecting the fineness of the product.

[0004] In a first aspect, embodiments of this application provide a grinding cylinder, including a grinding cylinder body and an airtight seal. The grinding cylinder body is provided with a grinding chamber. The airtight seal is disposed at one end of the grinding cylinder body along the axial direction of the grinding cylinder. The airtight seal includes a first section and a second section. The first section and the second section are arranged along the circumferential direction of the grinding cylinder, with the first section located above the second section. The first section is provided with a plurality of air guide holes. The plurality of air guide holes communicate with the grinding chamber.

[0005] In conjunction with the first aspect, in some implementations of the first aspect, a plurality of the air guide holes are arranged at intervals along the circumferential direction of the grinding cylinder.

[0006] In conjunction with the first aspect, in some implementations of the first aspect, the arc formed by connecting the centers of the plurality of air guide holes is a first arc, the central angle corresponding to the first arc is a first included angle, and the first included angle is 45°-225°.

[0007] In conjunction with the first aspect, in some implementations of the first aspect, the arc formed by connecting the centers of two adjacent air guide holes is a second arc, the central angle corresponding to the second arc is a second included angle, and the second included angle is 5°-45°.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the diameter of the air guide hole is 4mm-7mm.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the gas-tight component includes an end cap and an air guide plate. The air guide plate is disposed on the side of the end cap near the grinding chamber and forms an air supply channel with the end cap. The air supply channel is connected to a plurality of air guide holes. The air guide plate includes a first section and a second section.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the air guide plate includes a substrate and a surrounding plate disposed on the surface of the substrate facing away from the grinding chamber, a plurality of air guide holes are disposed on the substrate, and the substrate and the surrounding plate form an air guide cavity communicating with the air guide holes.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the enclosure is provided with a plurality of air inlets communicating with the air guide cavity, and the plurality of air inlets are connected to the air guide cavity and the air supply channel.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the air guide plate further includes reinforcing ribs, which are disposed on the surface of the substrate facing away from the grinding chamber and located inside the enclosure, and a plurality of the air guide holes are disposed on the reinforcing ribs.

[0013] In conjunction with the first aspect, in some implementations of the first aspect, along the axial direction of the grinding cylinder, the height by which the reinforcing rib protrudes from the substrate is a first height, and the height by which the surrounding plate protrudes from the substrate is a second height, wherein the first height is less than the second height.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the gas seal is used for rotatable connection with the stirring shaft, and the arc formed by the center connection of the plurality of air guide holes is a first arc. Along the circumferential direction of the grinding cylinder, the first arc includes a first end and a second end that are arranged opposite to each other. The first end and the second end are arranged sequentially along the rotation direction of the stirring shaft. Along the gravity direction of the grinding cylinder, the first end is higher than the second end.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, a plane perpendicular to the central axis of the grinding cylinder is defined as the projection plane, and the plurality of air guide holes are located within the first section; when the stirring shaft rotates counterclockwise, the projection of the first arc in the projection plane is located to the left of the projection of the first section in the projection plane, and when the stirring shaft rotates clockwise, the projection of the first arc in the projection plane is located to the right of the projection of the first section in the projection plane.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the grinding cylinder further includes an adjusting plate that rotates relative to the gas seal and is used to block part of the air guide hole.

[0017] In conjunction with the first aspect, in some implementations of the first aspect, the arc formed by connecting the centers of the plurality of air guide holes is a first arc, the first arc includes a first arc segment and a second arc segment, the first arc segment and the second arc segment are arranged along the circumferential direction of the grinding cylinder, and the adjusting plate is used to block the air guide hole corresponding to the first arc segment or the air guide hole corresponding to the second arc segment.

[0018] Secondly, embodiments of this application provide a grinding device, including a stirring shaft and a grinding cylinder as described above, wherein the stirring shaft is rotatably disposed within the grinding cylinder.

[0019] The grinding cylinder and grinding equipment provided in this application, on the one hand, are based on the fact that the gas seal is set at one end of the grinding cylinder body along the axial direction of the grinding cylinder, so that most of the gas can flow towards the discharge side of the grinding chamber, avoiding gas waste, reducing energy loss and production costs, and improving the gas conveying effect and conveying efficiency of materials; on the other hand, based on the fact that the air guide hole is set on the first section above the second section, the problem of gas blown out from the air guide hole set at the bottom of the gas seal being difficult to play an auxiliary feeding role due to the obstruction of the grinding medium and causing resource waste is avoided, thereby improving the discharge effect of the ground material, reducing the risk of over-grinding the material, improving the quality of the ground material, improving resource utilization, and reducing production costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1This is a partial cross-sectional view of the grinding equipment provided in the embodiments of this application.

[0022] Figure 2 This is a schematic diagram of a partial structure of the grinding cylinder of the grinding device provided in the first embodiment of this application.

[0023] Figure 3 yes Figure 2 A partial cross-sectional view along line AA of the grinding cylinder of the grinding equipment.

[0024] Figure 4 yes Figure 2 A first-view structural schematic diagram of the air guide plate of the grinding cylinder in the grinding equipment.

[0025] Figure 5 yes Figure 4 A partial cross-sectional view of the air guide plate in the middle.

[0026] Figure 6 yes Figure 2 A second-view structural schematic diagram of the air guide plate of the grinding cylinder in the grinding equipment.

[0027] Figure 7 yes Figure 4 A schematic diagram of another embodiment of the air guide plate of the grinding cylinder in the grinding equipment.

[0028] Figure 8 This is a schematic diagram of a partial structure of the grinding cylinder of the grinding device provided in the second embodiment of this application.

[0029] Figure 9 yes Figure 1 An enlarged view of the discharge paddle of the grinding equipment in the image.

[0030] Key reference numerals: Grinding equipment - 1000; Driver - 110; Bearing housing - 120; Bearing - 130; Stirring shaft - 200; Stirring paddle - 210; Discharge paddle - 220; Base - 221; Protrusion - 222; Grinding cylinder - 300; Grinding cylinder body - 10; Grinding chamber - 101; Feed inlet - 102; Discharge outlet - 103; Exhaust outlet - 104; Air seal - 30; Air supply channel - 301; End cap - 31; Positioning groove - 3101; Air guide plate - 32; Air guide cavity - 3201; Through hole - 3202; First section - 321; Second section - 3 22; Substrate - 323; Reinforcing rib - 324; Enclosure plate - 325; Air inlet - 3251; Mounting protrusion - 326; Air guide hole - 33; Air guide hole group - 330; First hole - 3301; Second hole - 3302; First arc - 331; First end - 3311; Second end - 3312; First arc segment - 3313; Second arc segment - 3314; Second arc - 332; Adjusting plate - 35; Separator - 50; Screen - 51; Rotation direction - F; Central axis - P; Axial direction - X; Radial direction - Y; Circumferential direction - Z; First included angle - α; Second included angle - β.

[0031] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] It is understood that the terminology in the specification, claims, and accompanying drawings of this application is for describing specific embodiments only and is not intended to limit this application. The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Unless the context clearly states otherwise, the singular forms "a" and "described" are also intended to include the plural forms. The term "comprising," and any variations thereof, are intended to cover non-exclusive inclusion. Furthermore, this application can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing the following specific embodiments is to facilitate a clearer and more thorough understanding of the disclosure of this application, wherein words indicating orientation such as up, down, left, and right refer only to the position of the illustrated structure in the corresponding drawings. In the description of this application, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set on" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] The following description provides preferred embodiments for carrying out this application; however, this description is for the purpose of illustrating the general principles of this application and is not intended to limit the scope of this application. The scope of protection of this application shall be determined by the appended claims.

[0035] Please see Figure 1 , Figure 1 This is a partial cross-sectional view of the grinding apparatus 1000 provided in an embodiment of this application. The grinding apparatus 1000 includes a stirring shaft 200 and a grinding cylinder 300. The stirring shaft 200 is rotatably disposed within the grinding cylinder 300. The grinding cylinder 300 contains grinding media and materials to be ground. The stirring shaft 200 is used to stir the grinding media and the materials to be ground. Thus, the materials to be ground and the grinding media undergo impact and friction to grind the larger particles into smaller particles, thereby achieving the required particle size and uniformity of the materials.

[0036] For the sake of accuracy, all references to direction in this article should be expressed in terms of direction. Figure 1For reference, "axial direction X" refers to the direction parallel to the central axis P of the grinding cylinder 300, i.e., the left-right direction (where the positive X-axis is left); the term "radial direction Y" refers to the direction perpendicular to the central axis P of the grinding cylinder 300, i.e., along the radius of the cross-section of the grinding cylinder 300, also known as the up-down direction (where the positive X-axis is up); the term "circumferential direction Z" refers to the circumferential direction of the grinding cylinder 300, i.e., the direction surrounding the central axis P of the grinding cylinder 300. The axial direction X, radial direction Y, and circumferential direction Z together constitute the three orthogonal directions of the grinding cylinder 300. The axial direction X, radial direction Y, and circumferential direction Z of the grinding cylinder 300 can be customized according to the specific structure of the product and the perspective presented in the accompanying drawings; this application does not impose specific limitations. For ease of description, the directions such as up, down, left, and right in this application are relative positions and do not constitute a limitation on implementation.

[0037] For example, in this embodiment, the grinding device 1000 is configured as a horizontal grinding device 1000. Specifically, the central axis P of the grinding cylinder 300 is parallel to the horizontal plane.

[0038] The grinding apparatus 1000 also includes a driver 110. The driver 110 is connected to the stirring shaft 200 for transmission. The driver 110 is used to drive the stirring shaft 200 to rotate. One end of the stirring shaft 200 passes through the grinding cylinder 300, and the other end passes through the outside of the grinding cylinder 300 and is connected to the driver 110.

[0039] In some embodiments, the grinding apparatus 1000 further includes a bearing housing 120 and a bearing 130. The bearing 130 is mounted on the bearing housing 120 and sleeved on the outside of the stirring shaft 200. Thus, the bearing 130 reduces friction and wear, making rotation smoother, reducing the coefficient of friction of mechanical load during transmission, thereby reducing energy consumption and extending the service life of the grinding apparatus 1000.

[0040] In this embodiment, the grinding cylinder 300 is configured with a cylindrical body, thereby improving the smoothness of movement of the grinding media and the material to be ground within the grinding cylinder 300, reducing wear on the grinding cylinder 300, extending the service life of the grinding cylinder 300 and the grinding media, and improving the uniformity of the material to be ground after grinding. The radial cross-section of the grinding cylinder 300 is circular. In other embodiments, the grinding cylinder 300 may also be configured as, but is not limited to, a spherical cylinder, a prismatic cylinder, or other regular or irregular cylinders; this application does not impose specific limitations on these embodiments.

[0041] The grinding cylinder 300 is provided with a grinding chamber 101. The grinding chamber 101 is used to contain materials and grinding media. A feed inlet 102 is provided at one end of the grinding cylinder 300 along the axial direction X, and a discharge outlet 103 is provided at the other end of the grinding cylinder 300 along the axial direction X. The feed inlet 102 and the discharge outlet 103 are connected to the grinding chamber 101.

[0042] The stirring shaft 200 and the grinding cylinder 300 are coaxially arranged. Of course, in some embodiments, the stirring shaft 200 and the grinding cylinder 300 may also be eccentrically arranged. Multiple stirring paddles 210 are provided on the stirring shaft 200. The stirring paddles 210 are used to stir the material to be ground and the grinding media, so that the material to be ground can be dispersed, sheared, and ground.

[0043] The material to be ground includes, but is not limited to, battery materials, food materials, pharmaceutical materials, fertilizer materials, and building materials. This application does not limit the material to be ground in its embodiments. For example, in this application embodiment, the material to be ground is a battery material. Battery materials include, but are not limited to, positive electrode materials, negative electrode materials, conductive agents, or dispersants; or, various materials are mixed to form a battery mixture.

[0044] Abrasive media are small spheres or beads used to grind and disperse particulate materials. The materials of abrasive media include, but are not limited to, at least one of zirconium oxide, alumina, and zirconium silicate. Abrasive media typically possess high hardness, good wear resistance, chemical stability, and a structure suitable for a variety of grinding applications.

[0045] It should be noted that, Figure 1 The purpose is only to schematically describe the arrangement between the stirring shaft 200 and the grinding cylinder 300, and not to make specific limitations on the connection position, connection relationship and specific structure of each component. Figure 1 The structure of the grinding apparatus 1000 illustrated in this embodiment is merely a schematic diagram and does not constitute a specific limitation on the grinding apparatus 1000. In other embodiments of this application, the grinding apparatus 1000 may include... Figure 1 The grinding apparatus 1000 may include, but is not limited to, a gas collection device, a temperature sensor, etc., with more or fewer components, or combinations of certain components, or different components. The gas collection device is used to collect the gas discharged from the grinding cylinder 300. The temperature sensor is used to detect the temperature inside the grinding cylinder 300.

[0046] Please also refer to Figure 1 , Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of a partial structure of the grinding cylinder 300 of the grinding apparatus 1000 provided in the first embodiment of this application; Figure 3 yes Figure 2 The image shows a partial cross-sectional view along line AA of the grinding cylinder 300 of the grinding equipment 1000. The grinding cylinder 300 includes a grinding cylinder body 10 and an airtight seal 30. The airtight seal 30 is disposed at one end of the grinding cylinder body 10 along the axial direction X of the grinding cylinder 300. The airtight seal 30 includes a first section 321 and a second section 322. The first section 321 and the second section 322 are arranged along the circumferential direction Z of the grinding cylinder 300, with the first section 321 located above the second section 322. The first section 321 is provided with a plurality of air guide holes 33. The plurality of air guide holes 33 communicate with the grinding chamber 101.

[0047] The grinding cylinder 300 and grinding equipment 1000 provided in this application, on the one hand, are based on the fact that the gas seal 30 is set at one end of the grinding cylinder 10 along the axial direction X of the grinding cylinder 300, so that most of the gas can flow towards the discharge side of the grinding chamber 101, avoiding gas waste, reducing energy loss and production costs, and improving the gas conveying effect and conveying efficiency of materials; on the other hand, based on the fact that the air guide hole 33 is set on the first section 321 above the second section 322, the gas blown out by the air guide hole 33 at the bottom of the gas seal 30 is not difficult to play an auxiliary feeding role due to the obstruction of the grinding medium, thus avoiding the problem of resource waste, thereby improving the discharge effect of the ground material, reducing the risk of over-grinding the material, improving the quality of the ground material, improving resource utilization, and reducing production costs; furthermore, when the gas blown into the grinding cylinder 300 by the air guide hole 33 is a cold air source, the cold air source can also help cool the ground material, avoiding the problem of the ground material denaturing due to high temperature, and improving the quality of the material.

[0048] It should be noted that "the first segment 321 is above the second segment 322" means that the lowest point of the first segment 321 in the direction of gravity of the grinding cylinder 10 is above the lowest point of the second segment 322 in the direction of gravity of the grinding cylinder 10. For example, "the first segment 321 is above the second segment 322" can include the entire area corresponding to the first segment 321 being above the entire area corresponding to the second segment 322; or, it can also include the entire area corresponding to the first segment 321 being above at least a portion of the area corresponding to the second segment 322, that is, at least a portion of the second segment 322 being below the first segment 321.

[0049] An exhaust port 104 is provided at the other end of the grinding cylinder 300 along the axial direction X. The exhaust port 104 and the discharge port 103 are arranged independently of each other. Exemplarily, in this embodiment, the exhaust port 104 is located above the discharge port 103, so that the material can be quickly discharged from the discharge port 103 under the action of gravity, and the gas is discharged from the exhaust port 104, thereby reducing the dust generated during the material discharge process.

[0050] The gas blown into the grinding cylinder 300 through the air guide 33 can also be supplied by an air supply device. The air supply device can directly provide natural wind or a cold air source. Of course, in some embodiments, a cooling device is installed along the delivery path of the air supply device to cool the gas supplied by the air supply device. The air supply device can be, but is not limited to, a fan, an air conditioner, or similar equipment.

[0051] The gas seal 30 is provided with an air supply channel 301. Exemplarily, in this embodiment, the gas seal 30 includes an end cap 31 and an air guide plate 32. The air guide plate 32 is disposed on the side of the end cap 31 near the grinding chamber 101, forming the air supply channel 301 between the air guide plate 32 and the end cap 31. The air guide plate 32 includes a first section 321 and a second section 322. Thus, by disposing of the air guide plate 32 on the side of the end cap 31 near the grinding chamber 101, most of the gas can flow towards the discharge side of the grinding chamber 101, avoiding gas waste, reducing energy loss and production costs, and improving the gas conveying effect and efficiency on materials. Of course, in some embodiments, the end cap 31 is directly provided with the air supply channel 301, that is, the air supply channel 301 is independent of the air guide plate 32.

[0052] In this embodiment, the end cap 31 and the air guide plate 32 are independently configured. A positioning groove 3101 is provided on the side of the end cap 31 facing the air guide plate 32, and the air guide plate 32 is accommodated within the positioning groove 3101, thereby improving the assembly efficiency between the air guide plate 32 and the end cap 31. The positioning groove 3101 is connected to the air supply channel 301, thereby achieving an airtight seal between the connection gap between the air guide plate 32 and the end cap 31, preventing material from entering the interior of the end cap 31 from the connection gap, and improving the safety and reliability of the grinding equipment 1000.

[0053] Of course, in some embodiments, the end cap 31 and the air guide plate 32 can also be sealed together by a sealing element, thereby preventing material in the grinding chamber 101 from entering the end cap 31 through the space between the end cap 31 and the air guide plate 32, thus improving the safety and reliability of the grinding equipment 1000. The end cap 31 and the air guide plate 32 can also be integrally formed, that is, the end cap 31 and the air guide plate 32 are connected to form an integral structure.

[0054] In this embodiment, multiple air guide holes 33 are arranged at intervals along the circumferential direction Z of the grinding cylinder 300. This improves, on the one hand, the smoothness and uniformity of gas flow at the top of the grinding chamber 101, enhancing the conveying effect and efficiency of the material being ground above the grinding medium; on the other hand, it avoids stress concentration in the air guide plate 32, improving its structural strength and extending its service life. The multiple air guide holes 33 are arranged at equal intervals along the circumferential direction Z of the grinding cylinder 300. Of course, in some embodiments, the multiple air guide holes 33 may also be distributed dispersedly along the grinding cylinder 300 on the air guide plate 32.

[0055] In this embodiment, a plurality of air guide holes 33 form a row of air guide hole groups 330 along the radial direction Y of the air guide plate 32. Specifically, the plurality of air guide holes 33 are all arranged on the same arc line with the same center as the air guide plate 32. This enhances the structural strength of the air guide plate 32 and reduces the processing and manufacturing difficulty of the air guide plate 32.

[0056] Of course, in some embodiments, multiple air guide holes 33 form multiple rows of air guide hole groups 330 along the radial direction Y of the air guide plate 32. Specifically, multiple air guide hole groups 330 are arranged at intervals along the radial direction Y of the air guide plate 32. The multiple air guide holes 33 corresponding to different air guide hole groups 330 are arranged on different arc lines with the same center as the air guide plate 32. The multiple air guide holes 33 corresponding to each air guide hole group 330 are arranged on the same arc line with the same center as the air guide plate 32. The number of adjacent rows of air guide hole groups can be the same; or the number of adjacent rows of air guide hole groups can be different. The air guide holes 33 of adjacent rows of air guide hole groups are staggered along the radial direction Y of the grinding cylinder 300. Specifically, any one air guide hole 33 of one row of air guide hole groups is located between two corresponding adjacent air guide holes 33 of another row of air guide hole groups. Of course, the multiple air guide holes 33 of one row of air guide holes are arranged in a pair with the multiple air guide holes 33 of another row of air guide holes along the radial direction Y of the grinding cylinder 300. The line connecting the center of any air guide hole 33 of one row of air guide holes and the center of the corresponding air guide hole 33 of the other row of air guide holes passes through the center of the air guide plate 32.

[0057] The number and arrangement of air guide holes 33 on the air guide plate 32 can be set according to actual conditions, and this application embodiment does not impose specific limitations. For example, in this embodiment, the number of air guide holes 33 is set to 9. For example, in some embodiments, the number of air guide holes 33 can also be set to, but is not limited to, 2, 3, 4, 5, 12 or more, etc.

[0058] Please refer to section 2 and 3 together. Figure 4 , Figure 4 yes Figure 2The diagram shows the structure of the air guide plate 32 of the grinding cylinder 300 in the grinding equipment 1000 from a first-view perspective. The arc formed by connecting the centers of multiple air guide holes 33 is the first arc 331. The central angle corresponding to the first arc 331 is the first included angle α, which is 45°-225°. Therefore, by setting the length of the arc formed by connecting the centers of multiple air guide holes 33 within a suitable range, the flow area of ​​the gas can cover the material being ground above the grinding medium, allowing the material being ground by the stirring shaft 200 to be blown by the airflow from the air holes, thus achieving an auxiliary feeding function, preventing over-grinding of the powder material, and improving the gas conveying effect and efficiency. The first included angle α is, for example, but not limited to, 45°, 60°, 80°, 100°, 120°, 140°, 160°, 180°, 200°, 220°, or 225°.

[0059] In some embodiments, the first included angle α is 45°-90°, thereby avoiding the problem that the gas introduced by the air guide hole 33 is blocked by the grinding medium and has difficulty playing an auxiliary feeding role and causing waste of resources. At the same time, the grinding material stirred and lifted by the stirring shaft 200 can be blown by the airflow from the air hole to achieve the auxiliary feeding role, avoid the powder material being over-ground, thereby improving the gas conveying effect and conveying efficiency of the material, and at the same time, making the ground material have good quality.

[0060] The arc formed by connecting the centers of two adjacent air guide holes 33 is the second arc 332. The central angle corresponding to the second arc 332 is the second included angle β, which is 5°-45°. In this embodiment, by setting the density of the air guide holes 33 within a suitable range, the air guide plate 32 is ensured to have good structural strength, and the air guide holes 33 can more effectively discharge the material being ground above the grinding media from the grinding chamber 101, thereby improving discharge efficiency and the quality of the material.

[0061] The second included angle β is, for example, but not limited to, 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, or 45°. It should be noted that the size of the first included angle α and the second included angle β can be set according to factors such as the amount of the grinding medium and the amount of the grinding material in the grinding chamber 101, and the size of the grinding cylinder 300. This embodiment of the application does not impose specific limitations.

[0062] The diameter of the air guide hole 33 is 4mm-7mm. The diameter of the air guide hole 33 is smaller than the diameter of the grinding media, thus preventing the grinding media from overflowing from the air guide hole 33 into the grinding chamber 101, improving the safety of the grinding cylinder 300. The diameter of the air guide hole 33 can be, but is not limited to, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, or 7mm.

[0063] Understandably, when the diameter of the air guide hole 33 is too large, the following problems will occur: First, the flow rate of the material in the grinding chamber 101 will increase, resulting in a shorter contact time between the material and the grinding media, thus affecting the fineness of the product; second, the structural strength of the air guide plate 32 will decrease, making it easier for the air guide plate 32 to be damaged or deformed, and the grinding media will easily overflow from the air guide hole 33 into the grinding chamber 101, reducing the safety of use; third, excessive air pressure will make particle collisions more intense, increasing the wear of the equipment. When the diameter of the air guide hole 33 is too small, the following problems will occur: First, it will cause poor flow of material in the grinding chamber, affecting the material discharge efficiency; second, insufficient air blowing will cause the material to stay in the grinding chamber 101 for too long, which may lead to over-grinding or uneven particle size distribution, affecting product quality; third, it is easy to cause hole blockage, high blowing resistance, large energy loss, unstable air volume, and increased processing and manufacturing difficulty. This embodiment of the application avoids the problem of material staying in the grinding chamber 101 for too long or too short a time, which would affect product quality, by setting a guide hole of appropriate size. It also avoids the problem of grinding media overflowing from the air guide hole 33 into the grinding chamber 101, which would reduce the safety of use, prevents air waste, reduces blowing resistance, improves energy utilization, extends the service life of the equipment, and makes the air guide plate 32 have good structural strength.

[0064] Please also refer to Figure 4 and Figure 5 , Figure 5 yes Figure 4 A partial cross-sectional view of the air guide plate 32 is shown. The air guide hole 33 includes a first hole 3301 and a second hole 3302. The second hole 3302 connects the first hole 3301 and the grinding chamber 101, and the diameter of the second hole 3302 is smaller than the diameter of the first hole 3301. The diameter of the second hole 3302 is smaller than the particle size of the grinding media. Therefore, on the one hand, the different diameters of the first hole 3301 and the second hole 3302 reduce the resistance to gas flow within the air guide hole 33, allowing gas to pass through the air guide hole 33 more smoothly and reducing the possibility of gas leakage; on the other hand, it allows for better control of gas flow rate and pressure distribution. Here, the diameter of the first hole 3301 refers to the diameter of the first hole 3301, the diameter of the second hole 3302 refers to the diameter of the second hole 3302, and the particle size of the grinding media refers to the diameter of the grinding media.

[0065] Please also refer to Figure 2 , Figure 5 and Figure 6 , Figure 6 yes Figure 2This is a second-view structural schematic diagram of the air guide plate 32 of the grinding cylinder 300 in the grinding equipment 1000. The air guide plate 32 includes a base plate 323 and a surrounding plate 325 disposed on the surface of the base plate 323 facing away from the grinding chamber 101. Multiple air guide holes 33 are disposed on the base plate 323, and the base plate 323 and the surrounding plate 325 form an air guide cavity 3201 that communicates with the air guide holes 33. Thus, on the one hand, the air guide cavity 3201 can be used to buffer and store the gas supplied by the gas supply equipment, thereby achieving stable regulation of gas flow and pressure, so that the gas is evenly distributed to each air guide hole 33, reducing the gas pressure applied to the air guide plate 32; on the other hand, the surrounding plate 325 can enhance the overall structural strength of the air guide plate 32, prevent the air guide plate 32 from being damaged or deformed, and extend the service life of the air guide plate 32.

[0066] The substrate 323 is configured as a circular plate. Therefore, since the edges of the circular plate are smooth, the problem of plate breakage during processing is avoided, reducing the manufacturing difficulty of the air guide plate 32. It should be noted that the shape of the substrate 323 can be set according to the shape of the grinding cylinder 10; this embodiment does not impose a specific limitation. For example, the substrate 323 can also be configured as a square plate or a polygonal plate, etc.

[0067] The substrate 323 is coaxially arranged with the stirring shaft 200. Specifically, a through hole 3202 for the stirring shaft 200 to pass through is provided in the middle of the substrate 323. A mounting protrusion 326 is provided on the edge of the through hole 3202 of the substrate 323. Exemplarily, in this embodiment, the mounting protrusion 326 is fixedly connected to the end cap 31, thereby realizing the fixed connection between the air guide plate 32 and the end cap 31, ensuring that the air guide hole 33 is located above the air guide plate 32, so that the flow area of ​​the gas can cover the material being ground raised above the grinding media.

[0068] In some embodiments, the enclosure 325 is provided with a plurality of air inlets 3251 communicating with the air guide cavity 3201. The plurality of air inlets 3251 are connected to the air guide cavity 3201 and the air supply channel 301. Thus, the air inlets 3251 provided on the side wall of the enclosure 325 reduce the impact force of gas on the substrate 323, prevent damage or deformation of the air guide plate 32, and extend the service life of the air guide plate 32; on the other hand, it allows the gas to enter the air guide cavity 3201, be buffered, and then be redistributed stably to each air guide hole 33, optimize the air path setting, and improve the utilization rate of the gas volume.

[0069] Multiple air inlets 3251 are spaced apart. These multiple air inlets 3251 are evenly arranged along the circumferential direction Z of the grinding cylinder 300, thereby ensuring uniform stress on the surrounding plate 325 and extending its service life. The number and arrangement of the multiple air inlets 3251 can be set according to actual conditions, and this application embodiment does not impose specific limitations.

[0070] In some embodiments, the air guide plate 32 further includes reinforcing ribs 324. The reinforcing ribs 324 are disposed on the surface of the substrate 323 facing away from the grinding chamber 101 and located inside the surrounding plate 325. A plurality of air guide holes 33 are disposed on the reinforcing ribs 324. Thus, on the one hand, the provision of the reinforcing ribs 324 can enhance the structural strength of the air guide plate 32, thereby preventing damage or deformation of the air guide plate 32 and extending its service life; on the other hand, the reinforcing ribs 324 are disposed on the surface of the substrate 323 facing the end cap 31, thereby avoiding the problem of damage to the air guide plate 32 caused by expansion of the grinding media and the reinforcing ribs 324, and avoiding the problem of material accumulation at the corners of the reinforcing ribs 324 and the substrate 323.

[0071] The reinforcing rib 324 is configured in an arc shape, ensuring uniform stress distribution during gas guiding by the gas guide plate 32 and extending its service life. The reinforcing rib 324 protrudes from the area of ​​the gas guide plate 32 corresponding to multiple gas guide holes 33, allowing the gas guide cavity 3201 to have a larger space for gas storage and improving its buffering capacity. In some embodiments, the reinforcing rib 324 is configured in a ring shape, facilitating its processing and shaping, and enhancing the structural strength of the gas guide plate 32. Specifically, the reinforcing rib 324 can also extend around the central axis of the grinding cylinder 300.

[0072] In some embodiments, along the axial direction X of the grinding cylinder 300, the height of the reinforcing rib 324 protruding from the substrate 323 is a first height, and the height of the surrounding plate 325 protruding from the substrate 323 is a second height, with the first height being less than the second height. This allows gas to enter the gas guide cavity 3201, be buffered, and then be re-stabilized and redistributed to the various gas guide holes 33, optimizing the gas path setup and improving the utilization rate of the gas volume.

[0073] Please see Figure 2 In this embodiment, the gas seal 30 is used for rotatable connection with the stirring shaft 200. Along the circumferential direction Z of the grinding cylinder 300, the first arc 331 includes a first end 3311 and a second end 3312 arranged opposite to each other, with the first end 3311 and the second end 3312 arranged sequentially along the rotation direction F of the stirring shaft 200. Along the direction of gravity of the grinding cylinder 300, the first end 3311 is higher than the second end 3312. Therefore, since the rotation direction F of the stirring shaft 200 is opposite to the arrangement of the air guide holes 33 from the lowest to the highest point, the gas flow area can fully cover the material being ground above the grinding medium, allowing the material being ground by the stirring shaft 200 to be blown by the airflow from the air holes, thus achieving an auxiliary feeding function, preventing over-grinding of the powder material, and thereby improving the gas conveying effect and efficiency.

[0074] For example, when the stirring shaft 200 rotates counterclockwise, the material to be ground and the grinding media inside the grinding cylinder 300 rotate in the rotation direction F of the stirring shaft 200. This causes the height of the grinding media at the front end of the grinding cylinder 300 corresponding to the rotation direction F of the stirring shaft 200 to be higher than the height of the grinding media at the rear end of the grinding cylinder 300 corresponding to the rotation direction F of the stirring shaft 200. Therefore, most of the grinding media is concentrated on the lower right side of the grinding cylinder 300. In this embodiment, the air guide holes 33 are concentrated in the area of ​​the air guide plate 32 corresponding to the upper left side of the grinding cylinder 300, thereby improving the air guiding efficiency of each air guide hole 33 and avoiding... The problem of wasted resources caused by the gas introduced through the air guide hole 33 being blocked by the grinding media is addressed by optimizing the air flow area to fully cover the material being ground above the grinding media. This allows the material being ground by the stirring shaft 200 to be blown by the airflow from the air hole, thus achieving an auxiliary feeding function and preventing the powder material from being over-ground. This improves the gas conveying effect and efficiency. Therefore, this embodiment optimizes the setting position of the air guide hole 33 of the air guide plate 32, so that the air guide plate 32 simultaneously has good air guiding effect of the air guide hole 33 and good structural strength.

[0075] Please also refer to Figure 4 and Figure 7 , Figure 7 yes Figure 4 This is a schematic diagram of another embodiment of the air guide plate 32 of the grinding cylinder 300 in the grinding apparatus 1000. Specifically, a plane perpendicular to the central axis P of the grinding cylinder 300 is defined as the projection plane, and multiple air guide holes 33 are located within the first section 321. Figure 4 As shown, when the stirring shaft 200 rotates counterclockwise, the projection of the first arc 331 in the projection plane is located to the left of the projection of the first segment 321 in the projection plane. Figure 7 As shown, when the stirring shaft 200 rotates clockwise, the projection of the first arc 331 in the projection plane is located to the right of the projection of the first segment 321 in the projection plane. Therefore, the position of the air guide hole 33 is set based on the rotation direction F of the stirring shaft 200, so that the gas flow area can fully cover the material being ground above the grinding media. This allows the material being ground by the stirring shaft 200 to be blown by the airflow from the air hole, achieving an auxiliary feeding function, preventing over-grinding of the powder material, and thus improving the gas conveying effect and efficiency.

[0076] Of course, in some embodiments, multiple air guide holes 33 can also be arranged on the top of the air guide plate 32. Thus, whether the stirring shaft 200 rotates counterclockwise or clockwise, the gas blown out of most of the air guide holes 33 can lift the material being ground above the grinding medium, allowing the material being ground, stirred and lifted by the stirring shaft 200, to be blown by the airflow from the air holes, achieving an auxiliary feeding function, preventing the powder material from being over-ground, thereby improving the gas conveying effect and efficiency, and making the air guide plate 32 suitable for different application scenarios. For example, the first end 3311 and the second end 3312 of the first arc 331 are symmetrically arranged with respect to the direction of gravity of the grinding cylinder 300. Specifically, along the circumferential direction Z of the grinding cylinder 300, the line connecting the center of the first arc 331 and the center of the guide plate is the axis of symmetry, and the first end 3311 and the second end 3312 of the first arc 331 are symmetrically arranged with respect to the axis of symmetry. It should be noted that the positions of the multiple air guide holes 33 on the air guide plate 32 can be set according to the actual use of the grinding equipment 1000, and this application does not make specific limitations.

[0077] For example, in this embodiment, the air guide plate 32 is fixedly disposed relative to the end cap 31. Therefore, the air guide holes 33 provided on the air guide plate 32 can always be located in the upper half of the air guide plate 32, preventing the air guide plate 32 from shifting relative to the end cap 31 under air pressure. This allows the gas flow area to cover the material being ground above the grinding media, improving the utilization rate of gas resources and achieving the function of auxiliary material conveying.

[0078] Of course, in some embodiments, the air guide plate 32 is rotatable relative to the end cap 31. Therefore, based on the rotatability of the air guide plate 32 relative to the end cap 31, it is convenient to adjust the position of the air guide holes 33 on the air guide plate 32 relative to the end cap 31 to adapt to the rotation direction F of the stirring shaft 200. This allows the air guide holes 33 to cover the area outside the grinding medium in the grinding chamber 101 to the maximum extent, so that the material being ground, stirred and lifted by the stirring shaft 200, can be blown by the airflow from the air holes, achieving an auxiliary feeding function, preventing over-grinding of powder materials, and improving the gas conveying effect and efficiency of the material.

[0079] Please also refer to Figure 2 and Figure 8This is a partial structural diagram of the grinding cylinder 300 of the grinding equipment 1000 provided in the second embodiment of this application. The grinding cylinder 300 also includes an adjusting plate 35. The adjusting plate 35 is rotatable relative to the gas seal 30. The adjusting plate 35 is used to block part of the air guide holes 33. As a result, the number of air guide holes 33 for guiding air into the grinding chamber 101 can be adjusted according to the stirring parameters of the stirring shaft 200 and the capacity of the grinding medium, thereby improving the utilization rate of the air intake, improving the uniformity of the gas volume and the stability of the gas velocity in the grinding chamber 101, and ensuring that the ground material can be discharged from the grinding chamber 101 in a timely manner, reducing the risk of over-grinding of the material.

[0080] For example, in this embodiment, the central angle corresponding to the first arc 331 is 180°. Of course, the central angle corresponding to the first arc 331 can also be greater than 180° or less than 180°. It should be noted that the user can set the position of the adjusting plate 35 according to factors such as the rotational speed of the stirring shaft 200 and the capacity of the grinding media, in order to control the number of air guide holes 33 communicating with the grinding chamber 101. For example, when the capacity of the grinding media in the grinding chamber 101 is small, the number of air guide holes 33 not blocked by the adjusting plate 35 can be larger, that is, the central angle corresponding to the line connecting the centers of the air guide holes 33 communicating with the grinding chamber 101 is larger. Conversely, when the capacity of the grinding media in the grinding chamber 101 is large, the number of air guide holes 33 not blocked by the adjusting plate 35 can be smaller, that is, the central angle corresponding to the line connecting the centers of the air guide holes 33 communicating with the grinding chamber 101 is smaller.

[0081] Of course, in some embodiments, for the convenience of processing and manufacturing the air guide plate 32, the air guide plate 32 can also uniformly arrange multiple air guide holes 33 along the circumferential direction Z of the grinding cylinder 300, that is, both the first section 321 and the second section 322 are provided with air guide holes 33, and the adjusting plate 35 is used to block the air guide holes 33 provided on the second section 322 and some of the air guide holes 33 provided on the first section 321.

[0082] The shape of the adjusting plate 35 is adapted to the shape of the reinforcing rib 324, thereby facilitating the sealing of some of the air guide holes 33 by the adjusting plate 35. In some embodiments, the adjusting plate 35 is sleeved on the outside of the reinforcing rib 324, so that the reinforcing rib 324 can provide a guiding effect for the rotation of the adjusting plate 35, thereby improving the smoothness and reliability of the rotation of the adjusting plate 35 relative to the air guide plate 32.

[0083] In some embodiments, the arc formed by connecting the centers of the plurality of air guide holes 33 is a first arc 331. The first arc 331 includes a first arc segment 3313 and a second arc segment 3314, which are arranged along the circumferential direction Z of the grinding cylinder 300. The adjusting plate 35 is used to block the air guide hole 33 corresponding to the first arc segment 3313 or the air guide hole 33 corresponding to the second arc segment 3314. This facilitates the rotation and positioning of the adjusting plate 35 and simplifies the structure.

[0084] In some embodiments, a limiting structure is provided on the air guide plate 32 to limit the rotation angle of the adjusting plate 35 relative to the air guide plate 32. This facilitates precise adjustment of the rotation angle of the adjusting plate 35 relative to the air guide plate 32.

[0085] Please also refer to Figure 1 and Figure 9 , Figure 9 yes Figure 1 An enlarged view of the discharge paddle 220 of the grinding equipment 1000. In some embodiments, the discharge paddle 220 is provided on the side of the stirring shaft 200 near the discharge port 103. The discharge paddle 220 is used to stir the material near the discharge port 103 so that the ground material can pass smoothly through the discharge port 103 and improve the discharge efficiency.

[0086] The grinding cylinder 300 also includes a separator 50. The separator 50 is located at the end of the grinding cylinder 10 facing away from the gas seal 30. The separator 50 is positioned near the discharge port 103. The material separated by the separator 50 is discharged towards the discharge port 103. At least one screen 51 is provided on the separator 50. The screen 51 is used to filter the material. The outer diameter of the grinding media is larger than the mesh size of the screen 51, thereby enabling the material to be discharged from the grinding chamber 101. The discharge paddle 220 is used to stir the material near the screen 51 to prevent the material from clogging the screen 51, allowing the ground material to pass smoothly through the screen 51 and improving the discharge efficiency.

[0087] The discharge paddle 220 includes a base 221 and a protrusion 222. The protrusion 222 is located on the side of the base 221 near the screen 51. The protrusion 222 increases the contact area between the discharge paddle 220 and the material. When the stirring shaft 200 drives the discharge paddle 220 to rotate, the discharge paddle 220 can fully agitate the material near the screen 51 and lift the grinding media and material, promoting the separation of the grinding media and material. It also ensures that the material is in full contact with all parts of the screen 51, increasing the contact opportunity between the material and the screen 51, and increasing the possibility of the ground material passing through the screen 51, thereby improving the material discharge efficiency, preventing material from accumulating at the screen 51, and thus preventing the material pipe from clogging the screen 51.

[0088] In some embodiments, the distance between the protrusion 222 and the screen 51 is smaller than the size of the grinding media, so that the protrusion 222 blocks the grinding media, preventing the grinding media from being stuck between the protrusion 222 and the screen 51, thereby preventing the grinding media from damaging the discharge paddle 220 and the screen 51. The distance between the protrusion 222 and the screen 51 can be the distance along the axial direction X of the grinding cylinder 300 between the end of the protrusion 222 away from the base 221 and the end of the screen 51 near the protrusion 222. The size of the grinding media can be the minimum size of the grinding media. The minimum size of the grinding media is the minimum thickness or minimum height of the grinding media as a whole, and the minimum size of the grinding media corresponds to the minimum width of the gap through which the grinding media can pass. The shape of the grinding media can be spherical. The size of the grinding media can be the diameter of the grinding media. The grinding media can be configured as a non-metallic grinding media to avoid the introduction of metallic impurities into the material to be ground. For example, the grinding media can be configured as ceramic balls, etc. In some embodiments, the grinding media can also be configured in other shapes.

[0089] In some embodiments, the distance between the protrusion 222 and the screen 51 may be less than half the size of the smallest grinding media to sufficiently prevent the grinding media from getting stuck between the protrusion 222 and the screen 51. For example, the distance between the protrusion 222 and the screen 51 may be less than half the diameter of the grinding media, that is, less than the radius of the grinding media.

[0090] The grinding equipment 1000 blows air into the grinding chamber 101 through the air guide hole 33, causing materials with the required particle size to be blown towards the discharge port 103, thus preventing over-grinding. The material in the grinding cylinder 10 is mainly contained in the lower half of the grinding cylinder 10 near the ground. The discharge paddle 220 agitates the material near the screen 51, causing it to be agitated to the upper half of the grinding cylinder 10 away from the ground. The protrusions 222, during agitation, generate more dust, and combined with the blowing action of the air entering through the air guide hole 33, facilitates the material being blown out of the grinding chamber 101 from the screen 51 in the upper half, thereby improving material discharge efficiency. Furthermore, the air blowing into the grinding cylinder 1000 through the air guide hole 33 also ensures continuous airflow through the screen 51, keeping the screen unclogged and preventing material blockage.

[0091] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A grinding cylinder (300), characterized in that, include: Grinding cylinder (10), wherein the grinding cylinder (10) is provided with a grinding chamber (101); An airtight seal (30) is disposed at one end of the grinding cylinder (10) along the axial direction (X) of the grinding cylinder (300); the airtight seal (30) includes a first section (321) and a second section (322), the first section (321) and the second section (322) are arranged along the circumferential direction (Z) of the grinding cylinder (300), the first section (321) is located above the second section (322) so that the flow area of ​​the gas can cover the material being ground raised above the grinding medium, the first section (321) is provided with a plurality of air guide holes (33), the plurality of air guide holes (33) are connected to the grinding chamber (101), and the plurality of air guide holes (33) are arranged at intervals along the circumferential direction (Z) of the grinding cylinder (300).

2. The grinding cylinder (300) as described in claim 1, characterized in that, The arc formed by connecting the centers of the multiple air guide holes (33) is the first arc (331), and the central angle corresponding to the first arc (331) is the first included angle (α), which is 45°-225°.

3. The grinding cylinder (300) as described in claim 1, characterized in that, The arc formed by connecting the centers of two adjacent air guide holes (33) is the second arc (332), and the central angle corresponding to the second arc (332) is the second included angle (β), which is 5°-45°.

4. The grinding cylinder (300) as described in claim 1, characterized in that, The diameter of the air guide hole (33) is 4mm-7mm.

5. The grinding cylinder (300) as described in claim 1, characterized in that, The gas seal (30) includes an end cap (31) and an air guide plate (32). The air guide plate (32) is disposed on the side of the end cap (31) near the grinding chamber (101) and forms an air supply channel (301) between the end cap (31) and the end cap (31). The air supply channel (301) is connected to a plurality of air guide holes (33). The air guide plate (32) includes a first section (321) and a second section (322).

6. The grinding cylinder (300) as described in claim 5, characterized in that, The air guide plate (32) includes a base plate (323) and a surrounding plate (325) disposed on the surface of the base plate (323) facing away from the grinding chamber (101). A plurality of air guide holes (33) are disposed on the base plate (323). The base plate (323) and the surrounding plate (325) form an air guide cavity (3201) that communicates with the air guide holes (33).

7. The grinding cylinder (300) as described in claim 6, characterized in that, The enclosure (325) is provided with a plurality of air inlets (3251) that communicate with the air guide cavity (3201), and the plurality of air inlets (3251) are connected to the air guide cavity (3201) and the air supply channel (301).

8. The grinding cylinder (300) as described in claim 6, characterized in that, The air guide plate (32) further includes a reinforcing rib (324), which is disposed on the surface of the substrate (323) facing away from the grinding chamber (101) and located inside the enclosure plate (325). A plurality of air guide holes (33) are disposed on the reinforcing rib (324).

9. The grinding cylinder (300) as described in claim 8, characterized in that, Along the axial direction (X) of the grinding cylinder (300), the height of the reinforcing rib (324) protruding from the substrate (323) is a first height, and the height of the surrounding plate (325) protruding from the substrate (323) is a second height, wherein the first height is less than the second height.

10. The grinding cylinder (300) as described in claim 1, characterized in that, The gas seal (30) is used to rotatably connect with the stirring shaft (200). The arc formed by connecting the centers of the plurality of air guide holes (33) is the first arc (331). Along the circumferential direction (Z) of the grinding cylinder (300), the first arc (331) includes a first end (3311) and a second end (3312) arranged opposite to each other. The first end (3311) and the second end (3312) are arranged sequentially along the rotation direction (F) of the stirring shaft (200). Along the gravity direction of the grinding cylinder (300), the first end (3311) is higher than the second end (3312).

11. The grinding cylinder (300) as described in claim 10, characterized in that, A plane perpendicular to the central axis (P) of the grinding cylinder (300) is defined as the projection plane, and the plurality of air guide holes (33) are located within the first section (321); when the stirring shaft (200) rotates counterclockwise, the projection of the first arc (331) in the projection plane is located to the left of the projection of the first section (321) in the projection plane, and when the stirring shaft (200) rotates clockwise, the projection of the first arc (331) in the projection plane is located to the right of the projection of the first section (321) in the projection plane.

12. The grinding cylinder (300) as described in claim 1, characterized in that, The grinding cylinder (300) also includes an adjusting plate (35) that rotates relative to the gas seal (30) and is used to block part of the air guide hole (33).

13. The grinding cylinder (300) as described in claim 12, characterized in that, The arc formed by connecting the centers of the multiple air guide holes (33) is the first arc (331). The first arc (331) includes a first arc segment (3313) and a second arc segment (3314). The first arc segment (3313) and the second arc segment (3314) are arranged along the circumferential direction (Z) of the grinding cylinder (300). The adjusting plate (35) is used to block the air guide hole (33) corresponding to the first arc segment (3313) or the air guide hole (33) corresponding to the second arc segment (3314).

14. A grinding apparatus (1000), characterized in that, It includes a stirring shaft (200) and a grinding cylinder (300) as described in any one of claims 1-13, wherein the stirring shaft (200) is rotatably disposed within the grinding cylinder (300).

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