Ball milling tank and ball milling device

Abstract

The embodiment of the utility model provides a ball milling tank and a ball milling device, the ball milling tank comprises a tank body, an electrode bar and a vacuum valve, and the extension direction of the tank body is a first direction; the tank body comprises a first cover plate perpendicular to the first direction; the vacuum valve is connected to the peripheral side of the first cover plate and communicates with the interior of the tank body; the electrode bar penetrates through the first cover plate in the first direction, the portion, extending out of the first cover plate, of the electrode bar forms a first electric connecting part, and the distance between the first electric connecting part and the vacuum valve is larger than the preset discharging distance. The first electric connection part of the electrode bar and the vacuum valve are arranged on the different sides of the first cover plate, and the distance between the first electric connection part and the vacuum valve is larger than the preset discharge distance, so that the vacuum valve can be effectively prevented from discharging under the high-voltage action of the first electric connection part, the tank body is protected from being damaged, and the service life of the tank body is prolonged. And the service life of the tank body is prolonged.

Description

Technical Field

[0001] The present application belongs to the field of powder processing technology, and specifically relates to a ball mill and a ball mill device. Background Art

[0002] Ball mills are commonly used for powder refinement, mixing, dispersion, and alloying, and are the most fundamental processing equipment for new material research and development. The ball mill jar is the core component of the ball mill.

[0003] In related art, a ball mill typically consists of a tank body, a vacuum valve connected to the tank body, and an electrode rod. The tank body is used to contain the powder, the vacuum valve is used to supply different reaction gases to the tank body, and the electrode rod is used to connect to an external power source and discharge electricity, thereby promoting powder refinement. However, when the vacuum valve is made of metal and is close to the electrode rod, the high voltage of the electrode rod can cause discharge in the vacuum valve, causing branching cracks in the tank body and shortening its service life. Utility Model Content

[0004] The present application aims to provide a ball mill and a ball mill device to solve the problem that the vacuum valve of the existing ball mill will produce discharge and affect the service life of the mill.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, the present application discloses a ball milling tank, comprising: a tank body, an electrode rod, and a vacuum valve, wherein the extending direction of the tank body is a first direction;

[0007] The tank body includes a first cover plate perpendicular to the first direction;

[0008] The vacuum valve is connected to the peripheral side of the first cover plate and communicates with the interior of the tank body;

[0009] The electrode rod is passed through the first cover plate along the first direction. The portion of the electrode rod extending relative to the first cover plate forms a first electrical connection portion. The distance between the first electrical connection portion and the vacuum valve is greater than a preset discharge distance.

[0010] Optionally, the preset discharge distance is 1.5 cm.

[0011] Optionally, the tank body further comprises a cylinder, and the cylinder extends along the first direction;

[0012] The first cover plate is connected to one end of the cylinder along the first direction, and the first cover plate includes: a first pressing plate and a second pressing plate, the first pressing plate and the second pressing plate are stacked along the first direction and the second pressing plate is close to the center of the cylinder;

[0013] The vacuum valve is connected to the first pressing plate or the second pressing plate.

[0014] Optionally, the first pressing plate has a first peripheral wall extending along the first direction, and the vacuum valve is connected to the first peripheral wall;

[0015] The first cover plate also includes a gas channel, which includes a first channel section and a second channel section that are interconnected. The first channel section is arranged on the first pressure plate, and one end of the first channel section that is away from the second channel section extends to the first peripheral wall to be connected to the vacuum valve. The second channel section is arranged on the second pressure plate, and one end of the second channel section that is away from the first channel section is connected to the interior of the cylinder.

[0016] Optionally, the first pressing plate has a first bottom wall close to the center of the cylinder, the second pressing plate has a second top wall away from the center of the cylinder, and the first bottom wall and / or the second top wall are provided with sealing grooves at corresponding positions of the gas channel;

[0017] The ball mill jar further comprises a sealing member, which is embedded in the sealing groove.

[0018] Optionally, the second pressing plate has a second peripheral wall extending along the first direction, and the vacuum valve is connected to the second peripheral wall;

[0019] The first cover plate further includes a gas channel, which is disposed in the second pressure plate. One end of the gas channel extends to the second peripheral wall to communicate with the vacuum valve, and the other end of the gas channel communicates with the interior of the cylinder.

[0020] Optionally, the tank body further comprises a second cover plate, and the second cover plate is arranged at an end of the cylinder body away from the first cover plate;

[0021] The cylinder is provided with a first fixing portion and a second fixing portion at both ends along the first direction, respectively. The first fixing portion is fixedly connected to the first cover plate, and the second fixing portion is fixedly connected to the second cover plate.

[0022] Optionally, the tank body further comprises: a first bolt and a second bolt;

[0023] A first threaded hole and a second threaded hole are respectively provided at corresponding positions of the first cover plate and the first fixing portion, and the first bolt is engaged with the first threaded hole and the second threaded hole;

[0024] A third threaded hole and a fourth threaded hole are respectively provided at corresponding positions of the second cover plate and the second fixing portion, and the second bolt is matched and connected with the third threaded hole and the fourth threaded hole.

[0025] In a second aspect, the present application further discloses a ball milling device, comprising: a power supply and the above-mentioned ball milling tank;

[0026] The power supply includes: a power supply body, and a positive electrode connector and a negative electrode connector connected to the power supply body. The positive electrode connector is electrically connected to the first electrical connection portion, and the negative electrode connector is electrically connected to the tank body.

[0027] Optionally, a second electrical connection portion is provided at one end of the positive electrode connector facing away from the power supply body;

[0028] One of the second electrical connection portion and the first electrical connection portion is provided with an internal thread, and the other of the second electrical connection portion and the first electrical connection portion is provided with an external thread, and the external thread is matched with the internal thread.

[0029] In the embodiment of the present application, since the vacuum valve is connected to the interior of the tank body, different reaction gases can be provided to the tank body. Since the electrode rod is provided with a first electrical connection portion, the electrode rod can be discharged by connecting the first electrical connection portion to an external power source, thereby promoting the refinement of the powder, etc. More importantly, since the first electrical connection portion is the portion of the electrode rod extending out of the first cover plate, that is, the first electrical connection portion is located at the end face of the first cover plate, and the vacuum valve is connected to the peripheral side of the first cover plate, and the distance between the first electrical connection portion and the vacuum valve is greater than the preset discharge distance. In this way, the vacuum valve can be effectively prevented from generating discharge under the action of the high voltage electricity of the first electrical connection portion, thereby protecting the tank body from damage and helping to increase the service life of the tank body.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 This is one of the structural diagrams of the ball mill provided in the embodiments of the present application;

[0033] Figure 2 This is the second structural diagram of the ball mill provided in the embodiment of the present application;

[0034] Figure 3 This is the third structural diagram of the ball mill provided in the embodiment of the present application;

[0035] Figure 4 This is one of the structural schematic diagrams of the first pressing plate provided in the embodiment of the present application;

[0036] Figure 5 This is the second structural diagram of the first pressing plate provided in the embodiment of the present application;

[0037] Figure 6 This is the third structural diagram of the first pressing plate provided in the embodiment of the present application;

[0038] Figure 7 This is one of the structural schematic diagrams of the second pressing plate provided in the embodiment of the present application;

[0039] Figure 8 This is the second structural diagram of the second pressing plate provided in the embodiment of the present application;

[0040] Figure 9 This is the third structural diagram of the second pressing plate provided in the embodiment of the present application;

[0041] Figure 10 This is one of the structural diagrams of the second cover provided in the embodiment of the present application;

[0042] Figure 11 This is the second structural schematic diagram of the second cover provided in the embodiment of the present application.

[0043] Figure 1: 1. Tank body, 11. First cover plate, 111. First pressure plate, 1111. First peripheral wall, 1112. First top wall, 1113. First bottom wall, 1114. First mounting hole, 1115. First annular groove, 1116. First sub-threaded hole, 112. Second pressure plate, 1121. Second peripheral wall, 1122. Second top wall, 1123. Second bottom wall, 1124. Second mounting hole, 1125. Sealing groove, 1126. Second annular groove, 11 27. Second sub-threaded hole, 113. Gas channel, 1131. First channel section, 1132. Second channel section, 12. Cylinder, 121. First fixing part, 122. Second fixing part, 13. Second cover plate, 131. Third annular groove, 132. Positioning groove, 133. Third threaded hole, 14. First bolt, 15. Second bolt, 2. Electrode rod, 21. Conductive core, 211. First electrical connection part, 22. Dielectric barrier layer, 3. Vacuum valve, X. First direction. DETAILED DESCRIPTION

[0044] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of these features. In the description of this utility model, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected items, and the character " / " generally indicates an "or" relationship between the connected items.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0047] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0048] Ball mills are commonly used for powder refinement, mixing, dispersion, and alloying, and are the most fundamental processing equipment for new material research and development. However, during the reaction process, they suffer from problems such as single energy input, insufficient energy, and severe agglomeration during dry processing. Low-temperature plasma technology utilizes active particles generated by low-temperature plasma, such as electrons, molecules, ions, atoms, and active free radicals. By introducing cold-field plasma into the vibrating ball mill through low-temperature plasma technology, powder refinement, alloying, active activation, chemical reactions, and in-situ gas-solid phase reactions can be promoted. This can greatly improve ball milling efficiency, significantly reduce ball milling contamination, and form a unique structure that significantly improves material performance.

[0049] In one embodiment, a ball mill includes a tank body 1, an electrode rod 2, and a vacuum valve 3. The tank body 1 includes a first cover plate 11. The electrode rod 2 and vacuum valve 3 are arranged in parallel and both penetrate the first cover plate 11. Technicians have discovered that after a period of use, the first cover plate 11 surrounding the vacuum valve 3 develops mounting cracks, requiring frequent replacement of the first cover plate 11. Research has determined that this is due to the small distance between the electrode rod 2 and the vacuum valve 3. The high voltage flowing through the electrode rod 2 causes discharge in the vacuum valve 3, which in turn causes mounting cracks in the first cover plate 11.

[0050] Based on this, an embodiment of the present application provides a ball mill, and the ball mill of the present application is described in detail below with reference to the accompanying drawings.

[0051] Reference Figures 1 to 3 , shows a schematic diagram of the structure of the ball mill provided in the embodiment of the present application, referring to Figures 4 to 6 , shows a schematic structural diagram of the first pressing plate provided in an embodiment of the present application, referring to Figures 7 to 9 , shows a schematic structural diagram of the second pressing plate provided in an embodiment of the present application, referring to Figures 10 and 11 , shows a schematic structural diagram of the second cover plate provided in an embodiment of the present application.

[0052] like Figures 1 to 3 As shown, the present application provides a ball mill jar, comprising: a jar body 1, an electrode rod 2, and a vacuum valve 3. The jar body 1 extends in a first direction X; the jar body 1 includes a first cover plate 11 perpendicular to the first direction X; the vacuum valve 3 is connected to the circumference of the first cover plate 11 and communicates with the interior of the jar body 1; the electrode rod 2 is inserted through the first cover plate 11 along the first direction X, and the portion of the electrode rod 2 extending relative to the first cover plate 11 forms a first electrical connection portion 211. The distance between the first electrical connection portion 211 and the vacuum valve 3 is greater than a preset discharge distance. Specifically, the first cover plate 11 includes a first pressure plate 111 facing away from the center of the jar body 1. The first pressure plate 111 has a first top wall 1112 facing away from the center of the jar body 1. The first electrical connection portion 211 is the portion of the electrode rod 2 extending relative to the first top wall 1112.

[0053] In the embodiment of the present application, since the vacuum valve 3 is connected to the interior of the tank body 1, different reaction gases can be provided to the tank body 1. Since the electrode rod 2 is provided with a first electrical connection portion 211, the electrode rod 2 can be discharged by connecting the first electrical connection portion 211 to an external power source, thereby promoting the refinement of the powder. More importantly, since the first electrical connection portion 211 is the portion of the electrode rod 2 extending out of the first cover plate 11, that is, the first electrical connection portion 211 is located at the end face of the first cover plate 11, and the vacuum valve 3 is connected to the peripheral side of the first cover plate 11, and the distance between the first electrical connection portion 211 and the vacuum valve 3 is greater than the preset discharge distance. In this way, the vacuum valve 3 can be effectively prevented from generating discharge under the action of the high voltage of the first electrical connection portion 211, thereby protecting the tank body 1 from damage and helping to increase the service life of the tank body 1.

[0054] It should be noted that the shape of the tank body 1 in the embodiment of the present application can be different shapes such as cylindrical, tubular, square, etc., and the tank body 1 in the embodiment of the present application is preferably a cylindrical tank body. The first cover plate 11 in the embodiment of the present application is usually made of a non-conductive non-metallic material, such as polytetrafluoroethylene, a combination of polytetrafluoroethylene and ceramic, etc. The vacuum valve 3 is usually made of a metal material, such as stainless steel. The above-mentioned "discharge distance" refers to the minimum projected distance between the edge of the first electrical connection portion 211 and the edge of the vacuum valve 3 on a plane perpendicular to the first direction X. In practical applications, the electrode rod 2 includes a conductive core 21 (the material of the conductive core 21 includes but is not limited to cast iron, stainless steel, copper, etc.) and a dielectric barrier layer 22 wrapping the conductive core 21 (the material of the dielectric barrier layer 22 includes but is not limited to polytetrafluoroethylene, nylon, aluminum oxide, aluminum nitride, zirconium oxide, etc.), and when the vacuum valve 3 is connected to the peripheral side of the first cover plate 11, the edge of the vacuum valve 3 contacts the peripheral wall of the first cover plate 11. In this case, the "discharge distance" refers to the minimum projected distance between the outer edge of the dielectric barrier layer 22 of the first electrical connection portion 211 and the peripheral wall of the first cover plate 11 on a plane perpendicular to the first direction X, that is, Figure 3 The distance a shown is shown. In addition, to further improve the discharge effect of the electrode rod 2, the electrode rod 2 can be set at the center of the tank body 1, that is, the electrode rod 2 can be inserted into the central area of ​​the first cover plate 11. Here, the "central area" refers to the area around the center of the first cover plate 11. Since the axis of the tank body 1 passes through the center of the first cover plate 11, by inserting the electrode rod 2 into the central area of ​​the first cover plate 11, the electrode rod 2 can be coaxially arranged with the tank body 1, thereby improving the discharge effect, better assisting grinding, and accelerating the refinement of the powder.

[0055] In practical applications, the vacuum valve 3 can provide different reactive gases to the interior of the tank 1, so that the reactive gases are ionized by the discharge of the electrode rod 2 to generate electrons, molecules, ions, atoms, and active free radicals, thereby promoting powder refinement, alloying, active activation, chemical reactions, and accelerating in-situ gas-solid phase reactions. The reactive gases include, but are not limited to, any one or more of helium, neon, argon, krypton, xenon, nitrogen, oxygen, ammonia, and carbon tetrafluoride.

[0056] In some optional embodiments of the present application, the preset discharge distance is 1.5 cm. Testing has shown that when the distance between the first electrical connection portion 211 and the vacuum valve 3 is greater than 1.5 cm, the vacuum valve 3 does not discharge, thereby effectively preventing damage to the first cover plate 11 and improving the service life of the first cover plate 11.

[0057] In actual applications, the inner side of the first cover plate 11 will be constantly impacted by the grinding balls, and a non-metallic material with a higher cost and greater hardness needs to be selected. In order to reduce the cost of the ball mill, the first cover plate 11 is usually composed of a first pressing plate 111 and a second pressing plate 112 of different materials. Among them, the second pressing plate 112 close to the center of the tank body 1 can be made of a non-metallic material with a higher cost and greater hardness, while the first pressing plate 111 far from the center of the tank body 1 can be made of a non-metallic material with a lower cost and lower hardness. Based on this, in some optional embodiments of the present application, such as Figure 3 As shown, the tank body 1 also includes a cylinder 12, which extends along the first direction X; the first cover plate 11 is connected to one end of the cylinder 12 along the first direction X, and the first cover plate 11 includes: a first pressure plate 111 and a second pressure plate 112, the first pressure plate 111 and the second pressure plate 112 are stacked along the first direction X and the second pressure plate 112 is close to the center of the cylinder 12; the vacuum valve 3 is connected to the first pressure plate 111 or the second pressure plate 112.

[0058] In the embodiment of the present application, since the vacuum valve 3 can be connected to the first pressure plate 111 or the second pressure plate 112, technical personnel in this field can adjust the setting position of the vacuum valve 3 according to actual needs and spatial layout, thereby improving the installation flexibility of the vacuum valve 3.

[0059] In specific applications, such as Figures 4 to 11As shown, the center area of ​​the first cover plate 11 is provided with mounting holes, including a first mounting hole 1114 provided on the first pressure plate 111 and a second mounting hole 1124 provided on the second pressure plate 112. A positioning groove 132 is provided on the side of the second cover plate 13 near the center of the barrel 12. Thus, the electrode rod 2 is positioned by passing it through the first mounting hole 1114 and the second mounting hole 1124, with the end of the electrode rod 2 near the second cover plate 13 embedded in the positioning groove 132. Furthermore, the second mounting hole 1124 includes a first through hole and a second through hole arranged sequentially and interconnected along the first direction X. The second through hole is provided near the center of the barrel 12, and the opening of the second through hole is larger than that of the first through hole, thereby forming a stepped surface between the first and second through holes. Correspondingly, a limiting protrusion is provided on the peripheral wall of the electrode rod 2, which abuts against the stepped surface, thereby reliably limiting the position of the electrode rod 2. Furthermore, the first pressing plate 111 is provided with a first annular groove 1115, which is arranged circumferentially around the first mounting hole 1114. The second pressing plate 112 is also provided with a fourth annular groove, which is arranged circumferentially around the first through hole. By providing sealing rings in the first annular groove 1115 and the fourth annular groove, respectively, the sealing effect between the electrode rod 2 and the mounting hole can be improved.

[0060] In some optional embodiments of the present application, such as Figures 4 to 6 As shown, the first pressure plate 111 has a first circumferential wall 1111 extending along the first direction X, and the vacuum valve 3 is connected to the first circumferential wall 1111; the first cover plate 11 also includes a gas channel 113, the gas channel 113 includes a first channel section 1131 and a second channel section 1132 that are interconnected, the first channel section 1131 is arranged on the first pressure plate 111, and one end of the first channel section 1131 away from the second channel section 1132 extends to the first circumferential wall 1111 to communicate with the vacuum valve 3, and the second channel section 1132 is arranged on the second pressure plate 112, and one end of the second channel section 1132 away from the first channel section 1131 is connected to the interior of the cylinder 12.

[0061] In the embodiment of the present application, a gas channel 113 is provided, with one end of the gas channel 113 extending to the first peripheral wall 1111 to communicate with the vacuum valve 3, and the other end communicating with the interior of the cylinder 12. This allows communication between the vacuum valve 3 and the interior of the tank body 1, thereby enabling evacuation of the tank body 1, exhaustion of reactive gases, or introduction of reactive gases. Furthermore, because the gas channel 113 is composed of a first channel section 1131 provided on the first pressing plate 111 and a second channel section 1132 provided on the second pressing plate 112, i.e., the gas channel 113 consists of only two channel sections, the structure of the gas channel 113 can be simplified, reducing the difficulty of manufacturing the gas channel 113.

[0062] In one embodiment, the second channel section 1132 is a through hole extending along the first direction X, and the first channel section 1131 includes a first blind hole and a second blind hole with perpendicular axes and interconnected, wherein the second blind hole extends along the first direction X. This further simplifies the structure of the gas channel 113 and reduces the difficulty of processing the gas channel 113. Furthermore, the vacuum valve 3 is provided with a connecting end, which is provided with an external thread. Correspondingly, the end of the first blind hole facing away from the second blind hole is provided with an internal thread. The mating connection of the internal and external threads achieves a reliable connection between the vacuum valve 3 and the first pressure plate 111.

[0063] In some optional embodiments of the present application, the first pressing plate 111 has a first bottom wall 1113 near the center of the cylinder 12, and the second pressing plate 112 has a second top wall 1122 facing away from the center of the cylinder 12. The first bottom wall 1113 and / or the second top wall 1122 are provided with sealing grooves 1125 at positions corresponding to the gas passage 113. The ball mill further includes a sealing member embedded in the sealing groove 1125. The sealing member is a sealing ring to prevent blocking the openings of the first channel section 1131 and the second channel section 1132.

[0064] In the embodiment of the present application, since the first bottom wall 1113 and / or the second top wall 1122 are provided with a sealing groove 1125, by embedding the sealing member in the sealing groove 1125 and the close fit between the sealing member and the first bottom wall 1113 and / or the second top wall 1122, gas leakage from the connection between the first channel section 1131 and the second channel section 1132 can be effectively prevented, which is beneficial to improving the sealing of the gas channel 113.

[0065] It should be noted that the embodiment of the present application does not limit the shape of the sealing groove 1125, and those skilled in the art can adjust it according to actual needs. It is understandable that the openings of the first channel section 1131 and the second channel section 1132 should both be located within the projection range of the sealing groove 1125 in the first direction X. In one embodiment, the cross-sectional shape of the sealing groove 1125 perpendicular to the first direction X is circular. In another embodiment, the cross-sectional shape of the sealing groove 1125 perpendicular to the first direction X is annular. In addition, the drawings of the present application only show the case where the sealing groove 1125 is provided on the second top wall 1122 of the second pressure plate 112. In actual applications, the sealing groove 1125 can also be provided on the first bottom wall 1113 of the first pressure plate 111, or the sealing groove 1125 can be provided on both the first bottom wall 1113 of the first pressure plate 111 and the second top wall 1122 of the second pressure plate 112. This is not limited here, and those skilled in the art can adjust it according to actual needs.

[0066] In some optional embodiments of the present application, such as Figures 7 and 8As shown, the second pressing plate 112 has a second peripheral wall 1121 extending along the first direction X, and the vacuum valve 3 is connected to the second peripheral wall 1121. The first cover plate 11 also includes a gas channel 113, which is disposed within the second pressing plate 112. One end of the gas channel 113 extends to the second peripheral wall 1121 to communicate with the vacuum valve 3, and the other end of the gas channel 113 communicates with the interior of the cylinder 12. Thus, by disposing the gas channel 113 within the second pressing plate 112, with one end of the gas channel 113 extending to the second peripheral wall 1121 to communicate with the vacuum valve 3 and the other end communicating with the interior of the cylinder 12, communication between the vacuum valve 3 and the interior of the tank body 1 can be achieved, thereby enabling evacuation of the tank body 1, exhaust of reactive gases, or introduction of reactive gases, etc.

[0067] In one embodiment, the gas channel 113 includes a third blind hole and a fourth blind hole with perpendicular axes that are interconnected, wherein the axis of the fourth blind hole is parallel to the first direction X. This simplifies the structure of the gas channel 113 and reduces the difficulty of processing the gas channel 113. Furthermore, the vacuum valve 3 is provided with a connecting end having an external thread. Correspondingly, the end of the third blind hole facing away from the fourth blind hole is provided with an internal thread. The mating connection of the internal and external threads enables a reliable connection between the vacuum valve 3 and the second pressure plate 112.

[0068] In some optional embodiments of the present application, the tank body 1 further includes a second cover plate 13, which is disposed at the end of the cylinder body 12 facing away from the first cover plate 11. A first fixing portion 121 and a second fixing portion 122 are respectively disposed at both ends of the cylinder body 12 along the first direction X. The first fixing portion 121 is fixedly connected to the first cover plate 11, and the second fixing portion 122 is fixedly connected to the second cover plate 13. It should be noted that the first fixing portion 121 and the second fixing portion 122 are both protrusions formed by the ends of the cylinder body 12 protruding toward a direction away from the center of the cylinder body 12.

[0069] In the embodiment of the present application, since the cylinder 12 is provided with a first fixing portion 121 and a second fixing portion 122, through the fixed connection between the first fixing portion 121 and the first cover plate 11, and the fixed connection between the second fixing portion 122 and the second cover plate 13, a closed space can be formed inside the tank body 1, effectively preventing gas or material from leaking during the ball milling process, which is beneficial to the stability and safety of the internal environment of the tank body 1.

[0070] In some optional embodiments of the present application, the tank body 1 also includes: a first bolt 14 and a second bolt 15; a first threaded hole and a second threaded hole are respectively provided at corresponding positions of the first cover plate 11 and the first fixing portion 121, and the first bolt 14 is cooperated with the first threaded hole and the second threaded hole; a third threaded hole 133 and a fourth threaded hole are respectively provided at corresponding positions of the second cover plate 13 and the second fixing portion 122, and the second bolt 15 is cooperated with the third threaded hole 133 and the fourth threaded hole.

[0071] In the embodiment of the present application, since the first cover plate 11 is provided with a first threaded hole and the first fixing portion 121 is provided with a second threaded hole, the first bolt 14 is connected with the first threaded hole and the second threaded hole to achieve a reliable connection between the first cover plate 11 and the first fixing portion 121. Since the second cover plate 13 is provided with a third threaded hole 133 and the second fixing portion 122 is provided with a fourth threaded hole, the second bolt 15 is connected with the third threaded hole 133 and the fourth threaded hole to achieve a reliable connection between the second cover plate 13 and the second fixing portion 122. In addition, compared to the flange connection used in the related art, the method of connecting the bolts with the threaded holes does not require the additional configuration of nuts, thereby improving the convenience of disassembly and assembly of the ball mill jar, shortening the disassembly and assembly time, and helping to improve the disassembly and assembly efficiency of the ball mill jar.

[0072] It should be noted that the first threaded hole includes a first sub-threaded hole 1116 opened on the first pressure plate 111, and a second sub-threaded hole 1127 opened on the second pressure plate 112. The first bolt 14 is connected with the first sub-threaded hole 1116, the second sub-threaded hole 1127 and the second threaded hole, so that the first pressure plate 111, the second pressure plate 112 and the cylinder 12 can be tightly connected together. In addition, the embodiment of the present application does not limit the number of the first bolts 14 and the second bolts 15, and those skilled in the art can adjust according to actual needs. In one embodiment, there are four first bolts 14 and four second bolts 15, and the four first bolts 14 are arranged at intervals along the circumference of the first cover plate 11, and the four second bolts 15 are arranged at intervals along the circumference of the second cover plate 13.

[0073] In specific applications, such as Figure 7 and Figure 9 As shown, the second pressing plate 112 has a second bottom wall 1123 close to the center of the cylinder 12, and the second bottom wall 1123 is provided with a second annular groove 1126 at a corresponding position of the first fixing portion 121. Figures 10 and 11As shown, a third annular groove 131 is provided on one side of the second cover plate 13 near the center of the cylinder 12 at a position corresponding to the second fixing portion 122. By providing sealing rings in the second annular groove 1126 and the third annular groove 131, respectively, the sealing effect between the second pressure plate 112 and the cylinder 12, and between the second cover plate 13 and the cylinder 12 can be improved.

[0074] In summary, the ball mill provided in the embodiments of the present application has at least the following advantages:

[0075] In the embodiment of the present application, since the vacuum valve is connected to the interior of the tank body, different reaction gases can be provided to the tank body. Since the electrode rod is provided with a first electrical connection portion, the electrode rod can be discharged by connecting the first electrical connection portion to an external power source, thereby promoting the refinement of the powder, etc. More importantly, since the first electrical connection portion is the portion of the electrode rod extending out of the first cover plate, that is, the first electrical connection portion is located at the end face of the first cover plate, and the vacuum valve is connected to the peripheral side of the first cover plate, and the distance between the first electrical connection portion and the vacuum valve is greater than the preset discharge distance. In this way, the vacuum valve can be effectively prevented from generating discharge under the action of the high voltage electricity of the first electrical connection portion, thereby protecting the tank body from damage and helping to increase the service life of the tank body.

[0076] An embodiment of the present application also provides a ball milling device, comprising: a power supply and the above-mentioned ball milling tank; the power supply comprises: a power supply body and a positive electrode connector and a negative electrode connector connected to the power supply body, the positive electrode connector is electrically connected to the first electrical connection part 211, and the negative electrode connector is electrically connected to the tank body 1.

[0077] In practical applications, the tank body 1 is typically made of stainless steel. By electrically connecting the positive connector of the power supply to the first electrical connection portion 211 of the electrode rod 2, and the negative connector of the power supply to the tank body 1, a complete discharge circuit can be formed, thereby promoting powder refinement, etc. The power supply is typically a plasma power supply.

[0078] It should be noted that in the embodiment of the present application, the structure of the ball mill is the same as that of the ball mill in any of the above embodiments, and its beneficial effects are similar, which will not be described in detail here. It is understandable that both the positive electrode connector and the negative electrode connector are high voltage wires.

[0079] In some optional embodiments of the present application, a second electrical connection portion is provided at one end of the positive electrode connector facing away from the power supply body; one of the second electrical connection portion and the first electrical connection portion is provided with an internal thread, and the other of the second electrical connection portion and the first electrical connection portion is provided with an external thread, and the external thread is matched with the internal thread for connection.

[0080] In actual applications, taking the example of a first electrical connection part having an external thread and a second electrical connection part having an internal thread, when the ball mill rotates or vibrates, the internal thread of the second electrical connection part can make a spiral motion relative to the external thread of the first electrical connection part, thereby improving the stress condition of the positive electrode connector and avoiding the risk of breakage of the positive electrode connector.

[0081] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0082] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A ball mill, characterized in that: include: A tank body, an electrode rod, and a vacuum valve, wherein the extending direction of the tank body is a first direction; The tank body includes a first cover plate perpendicular to the first direction; The vacuum valve is connected to the peripheral side of the first cover plate and communicates with the interior of the tank body; The electrode rod is passed through the first cover plate along the first direction. The portion of the electrode rod extending relative to the first cover plate forms a first electrical connection portion. The distance between the first electrical connection portion and the vacuum valve is greater than a preset discharge distance.

2. The ball mill according to claim 1, characterized in that: The preset discharge distance is 1.5 cm.

3. The ball mill according to claim 1 or 2, characterized in that: The tank body further includes a cylinder, and the cylinder extends along the first direction; The first cover plate is connected to one end of the cylinder along the first direction, and the first cover plate includes: a first pressing plate and a second pressing plate, the first pressing plate and the second pressing plate are stacked along the first direction and the second pressing plate is close to the center of the cylinder; The vacuum valve is connected to the first pressing plate or the second pressing plate.

4. The ball mill according to claim 3, characterized in that: The first pressing plate has a first peripheral wall extending along the first direction, and the vacuum valve is connected to the first peripheral wall; The first cover plate also includes a gas channel, which includes a first channel section and a second channel section that are interconnected. The first channel section is arranged on the first pressure plate, and one end of the first channel section that is away from the second channel section extends to the first peripheral wall to be connected to the vacuum valve. The second channel section is arranged on the second pressure plate, and one end of the second channel section that is away from the first channel section is connected to the interior of the cylinder.

5. The ball mill according to claim 4, characterized in that: The first pressing plate has a first bottom wall close to the center of the cylinder, the second pressing plate has a second top wall away from the center of the cylinder, and the first bottom wall and / or the second top wall are provided with sealing grooves at corresponding positions of the gas channel; The ball mill jar further comprises a sealing member, which is embedded in the sealing groove.

6. The ball mill according to claim 3, characterized in that: The second pressing plate has a second peripheral wall extending along the first direction, and the vacuum valve is connected to the second peripheral wall; The first cover plate further includes a gas channel, which is disposed in the second pressure plate. One end of the gas channel extends to the second peripheral wall to communicate with the vacuum valve, and the other end of the gas channel communicates with the interior of the cylinder.

7. The ball mill according to claim 3, characterized in that: The tank body further comprises a second cover plate, which is arranged at an end of the cylinder body away from the first cover plate; The cylinder is provided with a first fixing portion and a second fixing portion at both ends along the first direction, respectively. The first fixing portion is fixedly connected to the first cover plate, and the second fixing portion is fixedly connected to the second cover plate.

8. The ball mill according to claim 7, characterized in that: The tank body further comprises: a first bolt and a second bolt; A first threaded hole and a second threaded hole are respectively provided at corresponding positions of the first cover plate and the first fixing portion, and the first bolt is engaged with the first threaded hole and the second threaded hole; A third threaded hole and a fourth threaded hole are respectively provided at corresponding positions of the second cover plate and the second fixing portion, and the second bolt is matched and connected with the third threaded hole and the fourth threaded hole.

9. A ball milling device, characterized in that: include: A power supply and a ball mill according to any one of claims 1 to 8; The power supply includes: a power supply body, and a positive electrode connector and a negative electrode connector connected to the power supply body. The positive electrode connector is electrically connected to the first electrical connection portion, and the negative electrode connector is electrically connected to the tank body.

10. The ball milling device according to claim 9, characterized in that: A second electrical connection portion is provided at one end of the positive electrode connector facing away from the power supply body; One of the second electrical connection portion and the first electrical connection portion is provided with an internal thread, and the other of the second electrical connection portion and the first electrical connection portion is provided with an external thread, and the external thread is matched with the internal thread.

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