A white fused alumina ball mill with easy-to-clean drum
By designing a cleaning mechanism that eliminates the need for disassembly, the ball mill is continuously cleaned using hollow tubes and brush assemblies. This solves the problems of time-consuming, labor-intensive, and equipment-failure issues associated with traditional cleaning methods, thereby improving production efficiency and product purity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHENGZHOU TIANYUN NEW MATERIALS CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-26
AI Technical Summary
After long-term use, a material residue layer easily forms on the inner wall of the cylinder of a traditional white fused alumina ball mill, resulting in a reduction in effective volume and a decrease in grinding efficiency. Furthermore, traditional cleaning methods are time-consuming and labor-intensive, which can easily lead to equipment failure and affect product purity.
It adopts a non-disassembly cleaning mechanism, including a hollow tube and a brush assembly. Through electronic control, the brush can be used to brush against the inner lining of the ball mill and perform negative pressure suction, achieving continuous cleaning by "sweeping and vacuuming at the same time".
It achieves efficient cleaning without interrupting production, shortens cleaning time, reduces equipment failure rate, and improves production efficiency and product purity.
Smart Images
Figure CN224271360U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of ball mill equipment, specifically to a white corundum ball mill with an easy-to-clean drum. Background Technology
[0002] In the processing of hard materials such as white fused alumina, the ball mill, as a core piece of equipment, directly impacts production efficiency and maintenance costs. After prolonged use, traditional ball mills are prone to material residue buildup on the inner wall of the mill cylinder due to friction and impact. This is especially true for high-hardness materials like white fused alumina, where residues can easily caking on the inner liner, reducing the effective volume of the mill cylinder and decreasing grinding efficiency. Traditional cleaning methods require manual disassembly of the cylinder after shutdown, a time-consuming and labor-intensive process (approximately 4-6 hours per disassembly). Frequent disassembly can also loosen bolts and age seals at the connection between the cylinder and base, increasing equipment failure rates. Furthermore, manual cleaning leaves blind spots, allowing residual material to contaminate subsequent batches and affecting product purity. This technical solution addresses these pain points by proposing a white fused alumina ball mill with non-disassembly cleaning capabilities and an easy-to-clean drum. Utility Model Content
[0003] The purpose of this utility model is to provide a technical solution for a white corundum ball mill that facilitates the cleaning of the drum, thereby addressing the shortcomings mentioned in the background art. To overcome the drawbacks and defects described in the background art, this technical solution includes the following:
[0004] The device includes a ball mill mechanism, with a non-disassembly cleaning mechanism on the left side of the ball mill mechanism; the ball mill mechanism includes a base, a ball mill cylinder rotatably mounted on the base, and a motor fixed to the right side of the upper surface of the base to drive the ball mill cylinder to rotate; the left and right ends of the ball mill cylinder are respectively provided with a feed port and a discharge port, and a ball mill liner plate is fixed in the inner cavity of the ball mill cylinder;
[0005] The non-disassembly cleaning mechanism includes a square steel frame, a negative pressure vacuum cleaner fixed inside the left side of the square steel frame, and a hollow tube that slides left and right above the square steel frame. Multiple brushes are fixed in a circular array on the right side of the outer ring of the hollow tube. The suction end of the negative pressure vacuum cleaner is connected to a negative pressure tube that penetrates into the inner cavity of the hollow tube, and several suction holes are opened on the outer ring of the hollow tube between the brushes.
[0006] As a preferred embodiment of this utility model: the top surface of the base is fixed with rolling brackets on both the left and right sides to support the rotation of the ball mill cylinder.
[0007] As a preferred embodiment of this utility model, the output shaft of the motor is fixedly connected to the right end face of the ball mill cylinder via a coupling.
[0008] As a preferred embodiment of this utility model: an electrically controlled linear slide rail is fixed at both the front and rear positions of the upper surface of the square steel frame, and an electrically controlled slider is slidably arranged on the track of the electrically controlled linear slide rail.
[0009] As a preferred embodiment of this utility model: a needle roller bearing is installed on the left section of the outer ring of the hollow tube, and a gantry bracket is fixed on the outer ring side wall of the needle roller bearing.
[0010] As a preferred embodiment of this utility model, the top surface of the electrically controlled slider is fixedly connected to the two bottom legs of the gantry bracket.
[0011] As a preferred embodiment of this utility model: a servo motor is fixed on the left side wall of the gantry bracket, and the output shaft of the servo motor is fixedly connected to the left end of the hollow tube via a coupling.
[0012] As a preferred embodiment of this utility model: the right section of the hollow tube has a cavity, and a sealed bearing is fixed at the right end of the cavity. The end of the negative pressure tube away from the negative pressure vacuum cleaner passes through the inner ring of the sealed bearing.
[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:
[0014] This solution enables the cleaning of ball mill cylinders without interrupting the production process or disassembling the ball mill body. Through the coordinated axial extension and rotation of the hollow tube assembly driven by an external electronic control system, the brush directly contacts the surface of the ball mill liner to sweep away residual materials. Simultaneously, dust is instantly sucked up through the negative pressure pipeline, achieving continuous cleaning with "sweeping and suction at the same time". The time required for a single cleaning is significantly reduced compared to the traditional disassembly method. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0016] Figure 1 A schematic diagram of an easy-to-clean ball mill.
[0017] Figure 2 A schematic diagram of a white fused alumina ball mill.
[0018] Figure 3 This is a schematic diagram of the internal structure of the ball mill cylinder.
[0019] Figure 4 A schematic diagram of a mechanism for cleaning without disassembly;
[0020] Figure 5 This is a schematic diagram of the hollow pipe after it has been cut open.
[0021] Explanation of reference numerals in the attached figures:
[0022] 1. Ball mill mechanism; 11. Base; 12. Rolling bracket; 13. Rolling bearing; 14. Ball mill cylinder; 15. Electric motor; 16. Ball mill liner; 17. Feed port; 18. Discharge port; 2. Non-disassembly cleaning mechanism; 21. Square steel frame; 22. Electrically controlled linear slide rail; 23. Negative pressure pipe; 24. Brush; 25. Hollow tube; 26. Needle roller bearing; 27. Servo motor; 28. Gantry support; 29. Negative pressure vacuum cleaner; 210. Electrically controlled slider; 211. Dust suction hole; 212. Chamber; 213. Sealed bearing. Detailed Implementation
[0023] To provide a clearer explanation and description of the technical solution and implementation of this utility model, several preferred specific embodiments for implementing the technical solution of this utility model are introduced below.
[0024] The following description is exemplary in nature and is not intended to limit the scope, application, or use of this disclosure. It should be understood that in all these figures, the same or similar reference numerals indicate the same or similar parts and features. The figures are merely schematic representations of the concept and principles of embodiments of this disclosure and do not necessarily show the specific dimensions and scale of each embodiment. Specific details or structures of embodiments of this disclosure may be exaggerated in particular portions of certain figures. The disclosures of various publications, patents, and published patent specifications cited herein are incorporated herein by reference in their entirety. The technical solutions of this utility model will be clearly and completely described below in conjunction with embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model.
[0025] Example 1: Implementation of Basic Cleaning Functions
[0026] The white fused alumina ball mill of this embodiment includes a ball mill mechanism 1 and a non-disassembly cleaning mechanism 2. In the ball mill mechanism 1, the base 11 is a welded steel frame, with symmetrically mounted rolling brackets 12 on its top left and right sides. Polyurethane rollers are embedded in the brackets to reduce friction. The ball mill cylinder 14 is made of 304 stainless steel and is mounted on the rolling brackets 12 via rotating shafts at both ends. A ball mill liner 16 is welded to the inner wall of the cylinder. The feed port 17 and discharge port 18 are respectively located at both ends of the cylinder, and silicone sealing rings are installed at the ports. The motor 15 is bolted to the right side of the base 11, and its output shaft is rigidly connected to the right-end rotating shaft of the ball mill cylinder 14 via a coupling to achieve drive transmission.
[0027] The square steel frame 21 of the non-disassembly cleaning mechanism 2 is a welded structure of galvanized square tubing, with anchor bolts at its four corners to fix it to the ground. Two electrically controlled linear slide rails 22 are bolted parallel to the top surface of the steel frame 21. An electrically controlled slider 210 is slidably mounted on each slide rail, with a built-in ball screw drive module for synchronous sliding via a PLC control system. The hollow tube 25 is a 316L stainless steel tube with an outer diameter of 80mm. A needle roller bearing 26 is installed on the outer wall of its left section, and a gantry bracket 28 is welded to the outer ring of the bearing. The two legs at the bottom of the bracket are bolted to the top surface of the electrically controlled slider 210. A servo motor 27 is connected to the left-end shaft of the hollow tube 25 via a reducer, with an adjustable speed range of 0-300rpm.
[0028] Six sets of hard nylon brushes 24 are welded in a ring array on the outer wall of the right section of the hollow tube 25. φ8mm suction holes 211 are opened between adjacent brushes, and the holes are treated with laser drilling. The negative pressure vacuum cleaner 29 is an industrial-grade cyclone separator. Its suction end is connected to a negative pressure tube 23, which is a PVC flexible tube that passes through a sealed bearing 213 into the inner cavity of the hollow tube 25. The outer ring of the sealed bearing 213 is interference-fitted with the inner wall of the hollow tube 25.
[0029] Example 2: Based on Example 1, the electrically controlled linear slide rail 22 is upgraded to a closed-loop control system with encoder feedback. The electrically controlled slider 210 has a built-in displacement sensor that can provide real-time feedback on the axial position of the hollow tube 25. The PLC program presets a cleaning path algorithm and automatically calculates the coverage area of the brush 24 based on the length of the ball mill cylinder 14. When the position of the discharge port 18 is detected, the servo motor 27 starts rotation drive, causing the brush 24 to move along a spiral trajectory along the inner wall of the cylinder. The negative pressure vacuum cleaner 29 adds a frequency conversion control module, which automatically adjusts the suction power based on the feedback value of the negative pressure sensor at the suction port 211. When the dust concentration is detected to be excessive, the power is increased.
[0030] Example 3: This example improves the structure of brush 24 by adopting a segmented design: three sets of annular grooves are opened on the outer wall of the right section of the hollow tube 25, and a detachable brush module is installed in each groove. Each module is equipped with nylon bristles of different hardness. The rotational resistance is monitored by the torque sensor of the servo motor 27. When the resistance exceeds the threshold, the PLC automatically switches to the low-hardness brush module. At the same time, a three-way solenoid valve is added to the end of the negative pressure tube 23, which can switch to the backup suction channel. When the main channel is blocked, the backup channel is automatically activated to ensure continuous cleaning.
[0031] Based on the above-described preferred technical solution, the workflow of this technical solution is explained as follows:
[0032] The operator injects the white corundum material to be ground into the inner cavity of the ball mill cylinder 14 through the feed port 17 and closes the sealing cover at the port. At this time, the ball mill liner 16 is in direct contact with the material. The motor 15 drives the ball mill cylinder 14 to rotate clockwise on the rolling bracket 12 through the coupling. The material inside the cylinder tumbles due to inertia and is crushed and ground by the friction of the ball mill liner 16. After grinding, the material is discharged from the discharge port 18, and the dust and particles remaining on the inner wall of the cylinder enter the subsequent cleaning process. When the cleaning operation is started, the square steel frame 21 of the non-disassembly cleaning mechanism 2 is fixed to the left side of the ball mill mechanism 1 by anchor bolts. After the electric linear slide rail 22 is energized, the ball screw in its track drives the electric slider 210 to slide synchronously along the axial direction, driving the gantry bracket 28 and the hollow tube 25 to move as a whole towards the ball mill cylinder 14. The needle roller bearing 26 on the left section of the hollow tube 25 rolls above the square steel frame 21 during the movement process. The servo motor 27 drives the hollow tube 25 to rotate counterclockwise synchronously through the coupling. The brush 24 contacts the ball mill liner 16 during rotation and brushes away residual materials. The dust generated during the brushing process is sucked into the inner cavity of the hollow tube 25 through the dust suction hole 211 between adjacent brushes 24.
[0033] The negative pressure vacuum cleaner 29 operates continuously. Its suction end draws dust from the inner cavity of the hollow tube 25 to the dust collection box through the negative pressure pipe 23. The negative pressure pipe 23 passes through the right end of the hollow tube 25 via the sealed bearing 213. The outer ring of the sealed bearing 213 is tightly fitted to the inner wall of the hollow tube 25 to prevent dust leakage. When the electronically controlled slider 210 moves to the left limit position of the ball mill cylinder 14, the PLC control system controls the electronically controlled linear slide rail 22 to slide in the opposite direction. The hollow tube 25 exits the cylinder axially, and at the same time, the servo motor 27 adjusts its speed so that the brush 24 repeatedly cleans the inner wall of the cylinder with different spiral trajectories. If an increase in cleaning resistance is detected by the brush 24, such as due to material agglomeration or hard particles getting stuck, the torque sensor of the servo motor 27 sends a feedback signal to the PLC, and the system automatically stops the rotation drive. The electronically controlled slider 210 drives the hollow tube 25 to swing axially back and forth three times, and the vibration dislodges the stuck material. If the pressure sensor 29 of the negative pressure vacuum cleaner detects an abnormal negative pressure value, such as a clogged filter, the system will activate the backup channel solenoid valve, switch to the auxiliary vacuuming path, and simultaneously trigger the filter back-blowing program to remove dust from the filter surface through compressed air pulses.
[0034] After cleaning, the hollow tube 25 retracts to its initial position, the electronically controlled slider 210 locks to the left end of the square steel frame 21, the servo motor 27 stops, and the negative pressure vacuum cleaner 29 continues to run for 30 seconds to remove residual dust from the pipes. If it is necessary to switch cleaning modes, such as from dry brushing to wet spraying, the operator removes the brush module at the quick-change interface on the right end of the hollow tube 25, replaces the spray assembly, and connects to a water source. The inner cavity of the hollow tube 25 is converted into a liquid channel, the servo motor 27 drives the spray head to rotate and spray cleaning fluid, and the negative pressure vacuum cleaner 29 switches to circulation pump mode to draw the cleaning fluid into the recovery tank, realizing the rinsing of the inner wall of the cylinder and liquid recovery. In remote operation and maintenance mode, equipment operating status data, such as the displacement of the electronically controlled slider 210, the torque of the servo motor 27, and the pressure difference of the negative pressure vacuum cleaner 29, are uploaded to the cloud platform in real time. Maintenance personnel can view the cleaning operation video stream through a mobile terminal, which is transmitted by a miniature camera inside the hollow tube 25. When the cumulative cleaning time reaches the preset threshold, or the wear of the parts exceeds the standard value, such as the brush hardness decreasing by 20%, the system automatically pushes the maintenance task to the terminal, prompting the replacement of the brush module or the lubrication of the needle roller bearing 26.
[0035] The above description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A white corundum ball mill with an easy-to-clean drum, comprising a ball mill mechanism (1), characterized in that: A non-disassembly cleaning mechanism (2) is provided on the left side of the ball mill mechanism (1); The ball mill mechanism (1) includes a base (11), a ball mill cylinder (14) rotatably disposed above the base (11), and a motor (15) fixed on the right side of the upper surface of the base (11) to drive the ball mill cylinder (14) to rotate; the left and right ends of the ball mill cylinder (14) are respectively provided with a feed port (17) and a discharge port (18), and a ball mill inner liner plate (16) is fixed in the inner cavity of the ball mill cylinder (14); The non-disassembly cleaning mechanism (2) includes a square steel frame (21), a negative pressure vacuum cleaner (29) fixed inside the left side of the square steel frame (21), and a hollow tube (25) that slides left and right above the square steel frame (21). Multiple brushes (24) are fixed in a ring array on the right side of the outer ring of the hollow tube (25). The suction end of the negative pressure vacuum cleaner (29) is connected to a negative pressure tube (23) that penetrates into the inner cavity of the hollow tube (25). Several suction holes (211) are opened on the outer ring of the hollow tube (25) between the brushes (24).
2. A white fused alumina ball mill with an easy-to-clean drum as described in claim 1, characterized in that: The top surface of the base (11) is fixed with rolling brackets (12) on both the left and right sides to support the rotation of the ball mill cylinder (14).
3. A white fused alumina ball mill with an easy-to-clean drum as described in claim 1, characterized in that: The output shaft of the motor (15) is fixedly connected to the right end face of the ball mill cylinder (14) via a coupling.
4. A white fused alumina ball mill with an easy-to-clean drum as described in claim 1, characterized in that: An electrically controlled linear slide rail (22) is fixed at both the front and rear positions on the upper surface of the square steel frame (21), and an electrically controlled slider (210) is slidably arranged on the track of the electrically controlled linear slide rail (22).
5. A white fused alumina ball mill with an easy-to-clean drum as described in claim 1, characterized in that: A needle roller bearing (26) is installed on the left section of the outer ring of the hollow tube (25), and a gantry bracket (28) is fixed on the outer ring side wall of the needle roller bearing (26).
6. A white fused alumina ball mill with an easy-to-clean drum as described in claim 4, characterized in that: The top surface of the electrically controlled slider (210) is fixedly connected to the two bottom legs of the gantry bracket (28).
7. A white fused alumina ball mill with an easy-to-clean drum as described in claim 5, characterized in that: A servo motor (27) is fixed on the left side wall of the gantry bracket (28), and the output shaft of the servo motor (27) is fixedly connected to the left end of the hollow tube (25) via a coupling.
8. A white fused alumina ball mill with an easy-to-clean drum as described in claim 1, characterized in that: The hollow tube (25) has a chamber (212) on its right side, and a sealed bearing (213) is fixed at the right end of the chamber (212). The end of the negative pressure tube (23) away from the negative pressure vacuum cleaner (29) passes through the inner ring of the sealed bearing (213).