Dry type ball milling device

Abstract

The invention relates to the technical field of ball milling devices, in particular to a dry type ball milling device which comprises a horizontal base with a protective cover installed on the upper portion and further comprises a dry type ball milling part which is arranged in the protective cover and comprises a rotating disc rotationally installed on the horizontal base along the horizontal plane and a plurality of ball milling assemblies eccentrically arranged and rotationally installed on the rotating disc. The ball-milling assembly comprises a bearing cavity base, a locking unit is detachably installed on the outer portion of the bearing cavity base, and a ball-milling tank unit is installed between the bearing cavity base and the locking unit. The ball milling cavity is creatively arranged in the ball milling tank unit, so that a grinding blind area of a traditional cavity in dry type ball milling is avoided, the problem of material accumulation is avoided, the material grinding uniformity and dispersity are improved, and a continuous and reliable grinding function is provided for materials; the device can realize rotation and revolution of the ball milling tank unit, can be matched with the ball milling cavity to realize a more sufficient mixing and grinding effect, is favorable for sufficiently mixing materials, and is convenient for improving the grinding quality.

Description

Technical Field

[0001] This invention relates to the field of ball milling equipment technology, and specifically to a dry ball milling equipment. Background Technology

[0002] In the preparation of standard samples of low-fluorine fluorinated materials for electrolytic aluminum, the uniformity of mixing aluminum fluoride and high-purity alumina is the core. It is necessary to achieve molecular-level dispersion of fluorine to meet the uniformity requirements of the sample and ensure the linearity of the calibration curve.

[0003] In current preparation methods, dry ball milling is commonly used, but compared to wet ball milling, it has significant drawbacks in uniformity. Wet ball milling can enhance material flowability and grinding contact efficiency with the help of liquid media, and can achieve uniform dispersion of components more quickly. However, the current dry ball milling jars are cylindrical, and mixing is achieved solely through the collision and friction between solid particles and grinding beads. There are grinding blind zones around the jar. For systems with low fluorine content of 0.375%-9.748%, aluminum fluoride is prone to local enrichment due to particle agglomeration and insufficient dispersion power. In addition, the grinding blind zones directly affect the uniformity of the standard samples, leading to large calibration deviations.

[0004] In summary, the existing ball mill structure has limitations in achieving uniformity in material grinding. Therefore, considering that dry ball mills need to provide continuous and effective grinding force for raw materials that cannot be wet-ground, and reduce the impact of grinding blind zones, in order to improve the uniformity and dispersibility of ball milling, we propose a dry ball mill device. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings mentioned in the background section and provide a dry ball milling device.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A dry ball mill apparatus includes a horizontal base with a protective cover mounted on top, and further includes: The dry ball milling section is located inside the protective cover and includes a rotating disk rotatably mounted on the horizontal base along the horizontal plane, and multiple ball milling components eccentrically arranged and rotatably mounted on the rotating disk. When the rotating disk rotates, the multiple ball mill components rotate synchronously; The ball mill assembly includes a bearing cavity seat with a locking unit externally detachably mounted, and a ball milling jar unit is installed between the bearing cavity seat and the locking unit. The ball milling jar unit is used to grind the material in contact with the grinding beads.

[0007] Preferably, the ball milling jar unit includes a ball milling jar body with a ball milling jar lid threaded onto its top, and a ball milling chamber for holding materials and grinding beads is provided between the ball milling jar body and the ball milling jar lid; Preferably, the ball mill cavity is wider at the top and narrower at the bottom, and the top and bottom axial centers are respectively provided with downward protrusions and upward protrusions; The inner wall of the ball mill cavity is smooth and continuous.

[0008] Preferably, a top fixing plate is installed above the rotating disk via multiple fixing rods, and a main shaft is fixedly installed at the axis of the rotating disk and the top fixing plate; The upper and lower ends of the bearing cavity seat are respectively equipped with a top shaft and a bottom shaft for rotatably inserting into the top fixed plate and the rotating plate.

[0009] Preferably, the outer edge of the rotating disk is provided with gear teeth, a drive motor is installed at the bottom of the horizontal base, and an output gear for meshing with the rotating disk is installed at the output shaft of the drive motor.

[0010] Preferably, a first transmission gear is provided on the bottom shaft of the main shaft, and a second transmission gear is fixedly connected to the bottom end of the bottom shaft; The first transmission gear and the second transmission gear are connected by a transmission belt. When the main shaft rotates, the ball mill assembly rotates via the drive belt.

[0011] Preferably, the locking unit includes an encapsulation pressure plate with a locking shaft vertically mounted on the outside, and a pressure block for locking and fixing the ball mill jar unit is provided on the inner side of the encapsulation pressure plate; The bearing cavity seat is provided with a support block that cooperates with the pressure block to limit and clamp the ball mill jar unit.

[0012] Preferably, the upper and lower ends of the bearing cavity are respectively equipped with encapsulation units for locking and fixing the locking unit; The encapsulation unit includes a fixed base plate detachably mounted on the upper and lower ends of the bearing cavity seat, and a top plate mounted above the fixed base plate to form a clamping cavity.

[0013] Preferably, a scissor-type clamp is rotatably installed in the clamping cavity between the top plate and the fixed bottom plate. The scissor-type clamp is used to clamp and fix the clamping shaft through a power source to maintain the encapsulation state of the encapsulation plate.

[0014] Preferably, a double-headed telescopic electric cylinder is installed between the two jaws on both sides of the scissor gripper, and the double-headed telescopic electric cylinder is used to drive the scissor gripper to open and close.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This dry ball milling device innovatively incorporates a ball milling chamber within the ball milling tank unit, avoiding the grinding blind spots inherent in traditional chambers in dry ball milling, preventing material accumulation, improving the uniformity and dispersibility of material grinding, and providing continuous and reliable grinding functionality for materials. 2. This device can realize the rotation and revolution of the ball mill jar unit, which can work with the ball mill chamber to achieve a more thorough mixing and grinding effect, which is conducive to fully mixing materials and improving grinding quality; 3. Equipped with a locking unit for easy assembly and disassembly of the ball mill jar unit. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view of the installation relationship of the dry ball mill section of the present invention; Figure 3 This is one of the schematic diagrams of the dry ball mill section of the present invention; Figure 4 This is a second schematic diagram of the dry ball mill section of the present invention; Figure 5 This is the third schematic diagram of the dry ball mill section of the present invention; Figure 6 This is a schematic diagram of the ball mill assembly of the present invention; Figure 7 This is a top cross-sectional view of the ball mill assembly of the present invention; Figure 8 This is one of the schematic diagrams showing the installation relationship between the locking unit and the encapsulation unit of the present invention; Figure 9 This is the second schematic diagram showing the installation relationship between the locking unit and the encapsulation unit of the present invention; Figure 10 This is the third schematic diagram showing the installation relationship between the locking unit and the encapsulation unit of the present invention; Figure 11 This is a cross-sectional view of the ball mill jar unit of the present invention; Figure 12 This is a cross-sectional view of the ball mill jar unit of the present invention.

[0017] The meanings of the labels in the diagram are as follows: 1. Horizontal base; 2. Protective cover; 3. Rotating disk; 4. Drive motor; 41. Output gear; 5. Main shaft; 51. First transmission gear; 6. Drive belt; 7. Top fixing plate; 8. Fixing rod; 9. Ball mill assembly; 91. Top shaft; 92. Bottom shaft; 93. Second transmission gear; 94. Bearing cavity seat; 95. Support block; 96. Ball mill jar unit; 961. Ball mill jar body; 962. Ball mill jar cover; 9601. Ball mill cavity; 9602. Downward protrusion; 9603. Upward protrusion; 97. Locking unit; 971. Encapsulation plate; 972. Snap pin; 973. Pressing block; 98. Encapsulation unit; 981. Fixed base plate; 982. Top plate; 983. Scissor gripper; 984. Double-headed telescopic electric cylinder. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-12 The present invention will describe the above technical solution in detail through the following embodiments: This embodiment of the dry ball mill apparatus includes a horizontal base 1 with a protective cover 2 mounted on top, such as... Figures 1-2 The structure shown also includes a dry ball milling section, as described in this embodiment. Figure 2 The protective cover 2 is set inside the protective cover and specifically includes a rotating disk 3 that is rotatably mounted on a horizontal base 1 along the horizontal plane, and four ball mill components 9 that are eccentrically set and rotatably mounted on the rotating disk 3.

[0020] In this embodiment, a top fixing plate 7 is fixedly installed above the rotating disk 3 by four fixing rods 8, and a main shaft 5 is fixedly installed at the axis of the rotating disk 3 and the top fixing plate 7; as Figures 2-5 The structure shown has gear teeth on the outer edge of the rotating disk 3, and a drive motor 4 is installed at the bottom of the horizontal base 1. An output gear 41 for meshing with the rotating disk 3 is installed at the output shaft of the drive motor 4, that is, the drive motor 4 can drive the rotating disk 3 and the four ball mill components 9 to rotate as a whole.

[0021] like Figures 3-6As shown, the ball mill assembly 9 includes a bearing cavity seat 94 with a locking unit 97 externally detachably installed. The upper and lower ends of the bearing cavity seat 94 are respectively equipped with a top shaft 91 and a bottom shaft 92 for rotatably inserting onto the top fixed plate 7 and the rotating plate 3. In order to realize power transmission, a first transmission gear 51 is provided on the bottom shaft of the main shaft 5, and a second transmission gear 93 is fixedly connected to the bottom end of the bottom shaft 92. The first transmission gear 51 and the second transmission gear 93 are connected by a transmission belt 6, so that the ball mill assembly 9 can rotate when the main shaft 5 rotates.

[0022] Specifically, such as Figures 6-10 The structure shown includes a locking unit 97 comprising an encapsulation plate 971 on which a clamping shaft 972 is vertically mounted externally, a pressure block 973 on the inner side of the encapsulation plate 971, and a support block 95 in the bearing cavity seat 94. The grinding jar unit 96 is clamped and fixed by the support block 95 and the pressure block 973. In this embodiment, for ease of disassembly and assembly, an encapsulation unit 98 for clamping and fixing the locking unit 97 is installed at the upper and lower ends of the bearing cavity seat 94, respectively. The encapsulation unit 98 includes a fixed base plate 981 detachably mounted at the upper and lower ends of the bearing cavity seat 94, and a top plate 982 mounted above the fixed base plate 981. A scissor-type gripper 983 for clamping and fixing the clamping shaft 972 is installed in the clamping cavity between the top plate 982 and the fixed base plate 981. In this embodiment, a double-headed telescopic electric cylinder 984 is installed between the grippers on both sides of the scissor-type gripper 983, which can drive the scissor-type gripper 983 to open and close, thereby facilitating the removal and placement of the grinding jar unit 96 inside.

[0023] It should be noted that, in this embodiment, the ball mill jar unit 96 is as follows: Figure 11 , Figure 12 The structure shown includes a ball mill jar cover 962 threaded onto the top of the ball mill jar body 961, and a creatively designed ball milling chamber 9601 for holding materials and grinding beads is provided between the ball mill jar body 961 and the ball mill jar cover 962; as shown Figure 12 The structure shown has a ball milling cavity 9601 that is wider at the top and narrower at the bottom, with a downward protrusion 9602 at the top and an upward protrusion 9603 at the bottom axis, and the inner wall of the ball milling cavity 9601 is smooth and continuous.

[0024] It is worth explaining that the ball milling jar unit 96 rotates on its own axis, and at the same time, due to the rotation of the rotating disk 3, it can drive the four ball milling jar units 96 to revolve around the main shaft 5. Under the combined conditions of rotation and revolution, the ball milling chamber 9601 can improve the grinding quality and avoid grinding blind spots. For grinding systems of mixtures with low fluorine content, it can avoid the problem of aluminum fluoride particles agglomerating and insufficient dispersion affecting the uniformity of standard samples. This embodiment creatively provides a ball milling chamber 9601, which can produce the following effects during the grinding process: First, when the jar rotates and revolves, the grinding beads and grinding materials in the ball milling chamber 9601 will be subjected to centrifugal force, gravity, and frictional force from the jar wall. The force generated by rotation can make the grinding beads and materials rotate and move around the jar axis, while the centrifugal force generated by revolution can change their direction and speed of motion, presenting a complex path of spiral ascent, descent, and shuttling between different areas.

[0025] The complex movement trajectories of the grinding beads and materials result in more frequent and intense impacts and frictions between the grinding beads, between the grinding beads and the wall of the ball mill 9601, and between the grinding beads and the materials. For dry solid materials, this strong mechanical action can quickly break the binding force between material particles, causing large particles to break into smaller particles, which will continue to move and mix under the action of the grinding beads. This helps to continuously disperse material particles that might otherwise agglomerate, allowing all material particles to have the opportunity to contact the grinding beads. It enables the fine powder that has been ground to a certain degree to be fully mixed with the coarse powder that has not been fully ground. The fine powder will not stop being ground due to agglomeration, and the coarse powder can also contact the grinding beads in time to start grinding, thus ensuring the uniformity of grinding.

[0026] In addition, the ball mill chamber 9601, which is wider at the top and narrower at the bottom, with downward protrusions 9602 and upward protrusions 9603 at the top and bottom, allows the grinding beads to move better along the edges and corners of the chamber during rotation and revolution, avoiding the grinding blind spots and accumulation blind spots of traditional chambers. When the ball mill chamber rotates and revolves, the downward protrusions 9602 at the top change the trajectory of the grinding beads and materials. Under the action of centrifugal force, the grinding beads and materials move upward. When they encounter the downward protrusions 9602, their direction of motion is changed, causing them to move towards the center of the chamber or other areas. This change in direction of motion increases the probability and angle of collision between the grinding beads and the materials, as well as between the grinding beads themselves, thereby enhancing the grinding force and effect and more effectively crushing material particles.

[0027] The upward-protruding bottom 9603 acts as a guide for the downward-moving grinding beads and materials. Under the influence of gravity, the grinding beads and materials move downwards and, upon contact with the upward-protruding bottom 9603, their direction of movement changes, moving them to the sides or top of the cavity. This allows the grinding beads and materials to move and collide fully in the bottom area, preventing the bottom from becoming a "dead zone" for grinding. This ensures that the material at the bottom is also thoroughly ground and prevents material particles from continuously depositing at the bottom under gravity. This ensures that the material always participates in the grinding process and does not reduce grinding efficiency due to deposition. Therefore, the ball mill cavity 9601 of this application guarantees efficient movement and action of the grinding beads and materials throughout the grinding process, improving the overall grinding efficiency. It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A dry ball milling apparatus, comprising a horizontal base (1) with a protective cover (2) mounted on top, characterized in that: Also includes: The dry ball milling section is located inside the protective cover (2) and includes a rotating disk (3) rotatably mounted on the horizontal base (1) along the horizontal plane, and a plurality of ball milling components (9) eccentrically arranged and rotatably mounted on the rotating disk (3). When the rotating disk (3) rotates, the multiple ball mill components (9) rotate synchronously; The ball mill assembly (9) includes a bearing cavity seat (94) with a locking unit (97) externally detachably mounted, and a ball milling jar unit (96) is installed between the bearing cavity seat (94) and the locking unit (97), the ball milling jar unit (96) being used to grind materials in contact with grinding beads.

2. The dry ball mill apparatus as described in claim 1, characterized in that: The ball milling jar unit (96) includes a ball milling jar body (961) with a ball milling jar lid (962) threaded on the top, and a ball milling chamber (9601) for holding materials and grinding beads is provided between the ball milling jar body (961) and the ball milling jar lid (962).

3. The dry ball mill apparatus as described in claim 2, characterized in that: The ball mill cavity (9601) is wider at the top and narrower at the bottom, and the top and bottom axial centers are respectively provided with downward protrusions (9602) and upward protrusions (9603). The inner wall of the ball mill cavity (9601) is smooth and continuous.

4. The dry ball mill apparatus as described in claim 1, characterized in that: A top fixing plate (7) is installed above the rotating disk (3) by multiple fixing rods (8), and a main shaft (5) is fixedly installed at the axis of the rotating disk (3) and the top fixing plate (7); The upper and lower ends of the bearing cavity seat (94) are respectively equipped with a top shaft (91) and a bottom shaft (92) for rotatably inserting into the top fixed plate (7) and the rotating plate (3).

5. The dry ball mill apparatus as described in claim 4, characterized in that: The rotating disk (3) has teeth on its outer edge, and a drive motor (4) is installed at the bottom of the horizontal base (1). An output gear (41) for meshing with the rotating disk (3) is installed at the output shaft of the drive motor (4).

6. The dry ball mill apparatus as described in claim 5, characterized in that: The main shaft (5) is provided with a first transmission gear (51) on the bottom shaft, and the bottom shaft (92) is fixedly connected with a second transmission gear (93). The first transmission gear (51) and the second transmission gear (93) are connected by a transmission belt (6); When the main shaft (5) rotates, the ball mill assembly (9) rotates via the transmission belt (6).

7. The dry ball mill apparatus as described in claim 1, characterized in that: The locking unit (97) includes an encapsulation plate (971) with a locking shaft (972) mounted vertically on the outside, and a pressure block (973) for locking and fixing the ball mill jar unit (96) is provided on the inner side of the encapsulation plate (971). The bearing cavity seat (94) is provided with a support block (95) that cooperates with the pressure block (973) to limit and clamp the ball mill jar unit (96).

8. The dry ball mill apparatus as described in claim 7, characterized in that: The upper and lower ends of the bearing cavity seat (94) are respectively equipped with encapsulation units (98) for locking and fixing the locking unit (97). The encapsulation unit (98) includes a fixed base plate (981) detachably mounted on the upper and lower ends of the bearing cavity seat (94), and a top plate (982) mounted above the fixed base plate (981) for forming a clamping cavity.

9. The dry ball mill apparatus as described in claim 8, characterized in that: A scissor-type clamp (983) is rotatably installed in the clamping cavity between the top plate (982) and the fixed bottom plate (981). The scissor-type clamp (983) is used to clamp and fix the clamping shaft (972) by a power source to maintain the encapsulation state of the encapsulation plate (971).

10. The dry ball mill apparatus as described in claim 9, characterized in that: A double-headed telescopic electric cylinder (984) is installed between the two jaws of the scissor gripper (983), and the double-headed telescopic electric cylinder (984) is used to drive the scissor gripper (983) to open and close.

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