An automated ball mill and control method

Abstract

The present invention belongs to the field of ball mills, and specifically discloses an automatic ball mill and a control method, which include an automatic feeding system, a ball milling system, an automatic discharging system, and a control system. The ball milling system includes a driving system and a central turntable, a self-rotating turntable, and a ball milling tank driven by the driving system. A plurality of self-rotating turntables are arranged on the central turntable, and a ball milling tank is installed on each self-rotating turntable. The plurality of ball milling tanks are arranged below a material distributing telescopic structure. The ball milling tank includes a tank body, and a fourth discharging gate is arranged at the top of the tank body. The upper part of the tank body is a ball milling chamber, and the lower part is a storage bin. A number of ball milling beads with different particle sizes are arranged inside the ball milling chamber. An annular screen is arranged at the center of the ball milling chamber, and an adsorber is arranged inside the annular screen. The storage bin is located below the annular screen, and a weighing sensor and a third discharging gate are installed at the bottom of the storage bin; the automatic discharging system is arranged below the storage bin; the control system controls the automatic feeding system, the ball milling system, and the automatic discharging system.

Description

Technical Field

[0001] The present invention relates to the field of ball mills, and particularly to an automated ball mill and a control method. Background Art

[0002] Planetary ball mills are widely used in industries such as chemistry, pharmaceuticals, construction, pigments, etc. They achieve efficient wear and fine grinding of materials through a rotating cylinder and internal grinding media (usually steel balls). Currently, some automated planetary ball mills are disclosed in the prior art. For example, CN119076136A discloses an automated system applicable to planetary ball mills, CN119076143A discloses an automatic feeding device applicable to planetary ball mills, and CN119076144A discloses an alternating feeding structure applicable to planetary ball mills. However, the automated planetary ball mills proposed in the prior art still have the following deficiencies:

[0003] First, there is a lack of particle size control accuracy. The existing process chain is forced to adopt a two-stage treatment mode of "grinding first - screening later". The grinding products must be screened by additional screening processes or off-line particle size detection to achieve particle size screening, resulting in redundant process flow and increased energy consumption.

[0004] Second, the process parameters rely too much on experience. To avoid process anomalies such as under-grinding, over-grinding, and reverse grinding, operators need to estimate the grinding time based on the empirical formula t=(k·d²) / (E·η) (where d is the target particle size, E is the grinding energy density, and η is the efficiency coefficient), and adjust the process parameters in real time through visual observation. This manual intervention mode leads to process instability and a serious dependence on the skill level of operators.

[0005] Third, the separation efficiency restricts the improvement of production capacity. The traditional separation process mainly relies on manual labor, supplemented by vibrating sieves or magnetic separation devices, which not only increases the equipment investment cost but also forms an efficiency bottleneck in the production process. Especially in continuous production scenarios, this defect seriously affects the grinding efficiency and reduces the production capacity. Summary of the Invention

[0006] In order to solve the technical problems existing in the prior art, the present invention proposes an automated ball mill and a control method, which can achieve in-situ separation and realize the closed-loop control of particle size control - grinding time - separation efficiency.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] In the first aspect, the present invention provides an automated ball mill, specifically including:

[0009] Automatic feeding system, which includes a feeding box, a material distributing telescopic structure, and a cover connected in sequence from top to bottom. The material distributing telescopic structure includes a first discharging gate, a telescopic bin, a screening duct, and a second discharging gate arranged from top to bottom. The telescopic part drives the cover to move up and down to achieve the sealing of the ball milling system;

[0010] Ball milling system, which includes a driving system and a central turntable, a self-rotating turntable, and a ball milling tank driven by the driving system. A plurality of self-rotating turntables are arranged on the central turntable, and a ball milling tank is installed on each self-rotating turntable. The plurality of ball milling tanks are arranged below the material distributing telescopic structure. The ball milling tank includes a tank body, and a fourth discharging gate is arranged at the top of the tank body. The upper part of the tank body is a ball milling chamber, and the lower part is a storage bin. A number of ball milling beads with different particle sizes are arranged inside the ball milling chamber. An annular screen is arranged at the center of the ball milling chamber, and an adsorber is arranged inside the annular screen. The storage bin is located below the annular screen, and a weighing sensor and a third discharging gate are installed at the bottom of the storage bin;

[0011] Automatic discharging system, which is arranged below the storage bin;

[0012] Control system, which controls the automatic feeding system, the ball milling system, and the automatic discharging system;

[0013] As a further technical solution, the automatic discharging system includes a discharging box, and two inclined vibration baffles are arranged inside the discharging box. A conveyor track is arranged at the bottom of the two vibration baffles, and a discharging port is arranged on one side of the conveyor track.

[0014] As a further technical solution, the two inclined vibration baffles are arranged oppositely, the conveyor track is located between the vibration baffles and at the bottom of the discharging box.

[0015] As a further technical solution, the bottom of the vibration baffle is a vibration rod, and the vibration rod is driven by a vibration motor.

[0016] As a further technical solution, the ball milling system further includes a cooling system.

[0017] As a further technical solution, the cooling system is located at the discharging port position of the ball milling system.

[0018] As a further technical solution, the plurality of self-rotating turntables are evenly arranged along the circumferential direction of the central turntable.

[0019] As a further technical solution, the cover system is conical, and the feeding box is inverted conical.

[0020] As a further technical solution, a sub-material pipe is arranged inside the cover system, and the sub-material pipe connects the screening duct and the ball milling tank.

[0021] Second aspect, the present invention also provides a control method for an automatic ball mill, which is as follows:

[0022] Pour the material into the feed box, open the first discharge gate to release a quantitative amount of material into the screening conduit, and at the same time open the second discharge gate to introduce the material into the feed pipe of the ball mill capping system;

[0023] The telescopic bin extends, pressing the capping system tightly against the top of the ball mill tank to ensure airtightness;

[0024] Open the fourth discharge gate to release the material into the ball milling chamber of the ball mill tank;

[0025] After the fourth discharge gate is closed, the telescopic bin contracts, lifting the capping system from the top of the ball mill tank; at the same time, send a command to the control system to repeat the above feeding process, and start the central turntable, self-rotating turntable and cooling system of the ball milling system to work; the ball milling beads form dynamic collisions and shear the annular screen under the action of centrifugal force;

[0026] The annular screen separates qualified powder in real time: the adsorber generates negative pressure, sucks the fine powder into the annular screen, then converges to the center of the third discharge gate through the storage layer, and is evenly distributed with the assistance of centrifugal force;

[0027] The weighing sensor of the control system monitors the powder weight in real time. When the preset value is reached, send a signal to the control system to stop ball milling, open the third discharge gate to discharge the material, and the fine powder enters the automatic discharging system; at the same time, the automatic feeding system starts to work to achieve automatic feeding. After the control system receives the signal that the discharging is completed, trigger the automatic feeding system to load the next batch of materials.

[0028] The beneficial effects of the present invention are as follows:

[0029] First, the target powder particle size is precisely controllable. The ball milling system of the present invention is equipped with a specified target particle size annular screen and an adsorber in the ball mill tank. Through the mutual cooperation of the annular screen and the adsorber, and together with the control system to form a closed-loop negative pressure adsorption system, the powder reaching the target fineness can be adsorbed and collected during the grinding process.

[0030] Second, the entire grinding process does not require manual operation and estimation of the ball milling time. Through the closed-loop negative pressure adsorption system and the weighing sensor of the storage layer, weight closed-loop feedback is realized, and the powder reaching the target fineness is collected in real time, effectively avoiding process anomalies such as under-grinding, over-grinding and reverse grinding.

[0031] Third, the production capacity is improved. The whole set of equipment is equipped with an automatic feeding system, a ball milling system, an automatic discharging system and a control system adapted to the ball mill tank, which can realize fully automatic operation and closed-loop optimization of particle size control - grinding time - separation efficiency. The production capacity is improved through particle size consistency and real-time separation. Description of the Drawings

[0032] Figure 1 Schematic diagram of the overall structure of the automated ball mill proposed by the present invention;

[0033] Figure 2 Top view of the automated ball mill proposed by the present invention;

[0034] Figure 3 Front view of the automated ball mill proposed by the present invention;

[0035] Figure 4 Rear view of the automated ball mill proposed by the present invention;

[0036] Figure 5 Right view of the automated ball mill proposed by the present invention;

[0037] Figure 6 Left view of the automated ball mill proposed by the present invention;

[0038] Figure 7 Schematic diagram of the automatic feeding system proposed by the present invention;

[0039] Figure 8 Top view of the feeding box proposed by the present invention;

[0040] Figure 9 Bottom view of the capping system proposed by the present invention;

[0041] Figure 10 Schematic diagram of the material distribution telescopic structure proposed by the present invention;

[0042] Figure 11 Schematic diagram of the ball milling system proposed by the present invention;

[0043] Figure 12 Schematic diagram of the ball milling tank proposed by the present invention;

[0044] Figure 13 Schematic diagram of the automatic discharging system proposed by the present invention;

[0045] In the figure: 1. Automatic feeding system; 2. Support frame; 3. Ball milling system; 4. Automatic discharging system; 5. Control system; 11. Material distributing telescopic structure; 12. First discharging gate; 13. Telescopic storage bin; 14. Quarter-sieving material conduit; 15. Feeding box; 16. Second discharging gate; 17. Capping system; 31. Ball milling tank; 32. Rotating turntable; 33. First central hole; 34. Central turntable; 35. Second central hole; 36. First clamping groove; 37. Cooling system, 38. Driving system, 39. First discharge port; 310. Second clamping groove; 321. Tank body; 322. Upper encapsulation plate; 323. Screen; 324. Ball milling beads; 325. Signal sensor; 326. Third discharging gate; 327. Fourth discharging gate; 328. Adsorption machine; 329. Storage bin; 3210. Ring-shaped weighing sensor; 41. Conveyor track; 42. Discharging box; 43. Vibration baffle; 44. Vibration rod; 45. Vibration motor; 46. Second discharge port; Detailed implementation manners

[0046] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanations of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0047] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the present invention clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof;

[0048] For the convenience of description, if the words "upper", "lower", "left", and "right" appear in the present invention, they only indicate the same directions as the upper, lower, left, and right directions of the accompanying drawings themselves, and do not limit the structure. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0049] Term explanation section: The terms "installation", "connection", "connection", "fixation", etc. in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present invention proposes an automated ball mill and a control method.

[0051] This embodiment discloses an automated ball mill, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 shown. From top to bottom, they are an automatic feeding system 1, a ball milling system 3, an automatic discharging system 4, and a control system 5; the automatic feeding system 1, the ball milling system 3, the automatic discharging system 4, and the control system 5 are installed on a support frame 2;

[0052] The automatic feeding system 1 includes a feeding box, a material distributing telescopic structure, and a capping system connected in sequence from top to bottom. The material distributing telescopic structure includes a first discharging gate, a telescopic bin, a screening duct, and a second discharging gate arranged from top to bottom. The telescopic part drives the capping to move up and down to seal the ball milling system.

[0053] The ball milling system 3 includes a driving system and a central turntable, a self-rotating turntable, and a ball milling tank driven by the driving system. A plurality of self-rotating turntables are arranged on the central turntable, and a ball milling tank is installed on each self-rotating turntable. The plurality of ball milling tanks are arranged below the material distributing telescopic structure. The ball milling tank includes a tank body. A fourth discharging gate is arranged at the top of the tank body. The upper part of the tank body is a ball milling chamber, and the lower part is a storage bin. A plurality of ball milling beads with different particle sizes are arranged inside the ball milling chamber. An annular screen is arranged at the center of the ball milling chamber, and an adsorber is arranged inside the annular screen. The storage bin is located below the annular screen, and a weighing sensor and a third discharging gate are installed at the bottom of the storage bin;

[0054] The automatic discharging system 4 is arranged below the storage bin;

[0055] The control system 5 controls the automatic feeding system, the ball milling system, and the automatic discharging system.

[0056] The ball milling system 3 of the present invention, by carrying a specified target particle size annular screen and an adsorber in the ball milling tank, together with the control system, constitutes a closed-loop negative pressure adsorption system, which can adsorb and collect powders reaching the target fineness during the grinding process; at the same time, it cooperates with the weighing sensor of the storage layer to achieve weight closed-loop feedback, and collect powders reaching the target fineness in real time, effectively avoiding process abnormalities such as under-grinding, over-grinding, and reverse grinding.

[0057] Specifically, the automatic feeding system 1 in this embodiment is as Figure 7As shown in the figure, it includes a feeding box 15, a material distributing telescopic structure 11, and a capping system 17. The feeding box 15 is funnel-shaped, the material distributing telescopic structure 11 is cylindrical, and the capping system 17 is an inverted funnel-shaped. The feeding box 15, the material distributing telescopic structure 11, and the capping system 17 are connected in sequence from top to bottom. The material distributing telescopic structure 11 includes a first discharge gate 12, a telescopic bin 13, a four-way sieve material conduit 14, and a second discharge gate 16 arranged from top to bottom. The telescopic bin 13 drives the capping system 17 to move up and down to seal the ball milling system 3.

[0058] Further, the above-mentioned feeding box 15 is as Figure 8 shown. Its top opening diameter is 800 mm, the bottom opening diameter is 300 mm, the height of the feeding box 15 is 600 mm, and the wall thickness is 9 mm. Its function is to store the dried materials to be ground.

[0059] Further, the above-mentioned material distributing telescopic structure 11 is as Figure 10 shown, in a cylindrical shape. The top and bottom opening diameters of the material distributing telescopic structure 11 are 300 mm, and it includes a first discharge gate 12, a telescopic bin 13, a four-way sieve material conduit 14, and a second discharge gate 16. The first discharge gate 12 is installed at the junction of the telescopic bin 13 and the feeding box 15. The function of the first discharge gate 12 is to introduce materials into the telescopic bin 13. The first discharge gate 12 is opened downward along the vertical central axis of the automatic feeding system 1 to control the mass of the materials to be ground entering the ball milling layer in each batch. The wall thickness of the first discharge gate 12 is 7 mm. The telescopic bin 13 buffers the materials and at the same time controls the distance between the entire automatic feeding system 1 and the ball milling system 3 through its telescopic action, so that the ball mill capping system 17 can seal the ball milling tank 31, and at the same time ensure that the materials to be ground in the four-way sieve material conduit 14 effectively and smoothly enter the ball milling tank 31 for grinding. The telescopic bin 13 itself is made of a foldable and telescopic soft material, and is driven by multiple telescopic rods to expand or contract.

[0060] Further, the wall thickness of the four-way sieve material conduit 14 is 9 mm. Its function is to evenly divide the materials to be ground in each batch into four parts, thereby effectively reducing the mass difference of the materials entering each ball milling tank 31. The four-way sieve material conduit 14 corresponds to four ball milling tanks 31.

[0061] Further, the function of the second discharge gate 16 is to introduce the materials in the four-way sieve material conduit 14 into four sub-material pipes. The second discharge gate 16 is opened downward along the vertical central axis of the automatic feeding system 1 to control the mass of the materials to be ground entering the ball milling layer in each batch. The wall thickness of the second discharge gate 16 is 7 mm.

[0062] Further, as Figure 9As shown, the ball mill cover system 17 is in the shape of an inverted funnel, with an opening diameter of 300 mm at the top, an opening diameter of 800 mm at the bottom, a shell thickness of 9 mm, and four sub-material pipes are provided inside, corresponding to the four-way screening material conduit 14 respectively. The opening diameter at the bottom of the four sub-material pipes is 150 mm, and the wall thickness of the four sub-material pipes is 9 mm.

[0063] Specifically, the automatic ball milling system 3 in this embodiment is as Figure 11 、 Figure 12 shown, including a ball mill tank 31, a self-rotating turntable 32, a central turntable 34, a motor, a speed reduction device, a cooling system 37, etc. A plurality of self-rotating turntables 32 are arranged on the central turntable 34. A first central hole 33 is provided at the center of each self-rotating turntable 32, and a ball mill tank 31 is installed on the first central hole 33. A plurality of ball mill tanks 31 are arranged below the material distribution telescopic structure 11. In this embodiment, there are four ball mill tanks 31 in total. The four ball mill tanks 31 are located above the self-rotating turntable 32. Each ball mill tank 31 includes a tank body 321. A fourth discharge gate 327 is provided at the top of the tank body 321. The upper part of the tank body 321 is a ball milling chamber, and the lower part is a storage bin 329. An annular screen 323 is arranged at the center of the ball milling chamber. An adsorber 328 is arranged inside the annular screen 323. The storage bin 329 is located below the annular screen 323; A weighing sensor and a third discharge gate 326 are installed at the bottom of the storage bin 329;

[0064] That is, the ball mill tank 31 of the automatic planetary ball mill in this embodiment is divided into three layers, as Figure 12 shown, which are the ball milling layer, the storage layer and the control layer respectively. Among them, the ball milling layer is 120 mm high, the storage layer is 50 mm high, and the control layer is 30 mm high. The ball mill tank 31 is cylindrical with a diameter of 120 mm; More specifically: the ball milling layer in this embodiment includes a ball milling chamber. An annular screen 323 is arranged at the center of the ball milling chamber. An adsorber 328 is arranged inside the annular screen 323; A number of ball milling beads 324 with different particle sizes are arranged outside the annular screen 323, that is, there are ball milling beads 324 with different particle sizes in the ball milling layer; Specifically, the proportion of the ball milling beads 324 is optimized (10 mm:5 mm:2 mm = 1:2:4): the large ball milling beads 324 impact and crush large particles, and the small ball milling beads 324 are refined to the nanoscale (such as 1 μm). Combined with the tungsten carbide screen 323 (the aperture is adjustable), the standard deviation of the particle size distribution is compressed from ±15% of the traditional equipment to ±5%.

[0065] Further, the annular screen 323 is a detachable screen 323 with a specified aperture (replaced according to the target grinding fineness size). The upper encapsulation plate 322 of the screen 323 also has the same particle size as the side. An adsorber 328 is placed in the middle of the screen 323. The adsorber 328 is placed at the center of the upper encapsulation plate 322 of the screen 323. The adsorber 328 mainly drives the fan to rotate through a motor to generate negative pressure and form an air flow. When the adsorber 328 is started, the fan rotates rapidly under the drive of the motor, and a low-pressure area is formed inside. This low-pressure area causes the higher-pressure air outside the screen 323 to be inhaled, so that the powder with a particle size smaller than the screen hole size is inhaled into the screen 323, achieving the effect of collecting the powder with the target grinding fineness.

[0066] Further, the overall outer wall shape of the storage layer is funnel-shaped, including a storage bin 329. The main function of the storage bin 329 is to collect the powder with the target grinding fineness in the screen 323 in the ball milling layer. In order to evenly distribute the scattered powder with the target grinding fineness, the hourglass form is adopted to converge the scattered powder with the target grinding fineness at the center of the third discharge gate 326 and evenly distribute it to the third discharge gate 326 through the centrifugal force generated during the rotation of the ball mill.

[0067] Further, the control layer is mainly equipped with an annular load cell 3210. Its main function is to sense the weight of the powder with the target grinding fineness in the storage bin 329. When the weight is equal to the feeding weight, the signal sensor 325 on the annular load cell 3210 sends a stop rotation signal to the control system 5, and opens the third discharge gate 326 to discharge the powder with the target grinding fineness in the storage layer into the automatic discharging system 4. At the same time, the control system 5 issues a feeding instruction to make the material in the automatic feeding system 1 enter the ball milling layer.

[0068] Further, the rotating turntable 32 in this embodiment is annular. The circular hollow part communicates with the third discharge gate 326. It is made of stainless steel and there are four in total. The height of the rotating turntable 32 is 20 mm, the diameter is 124 mm, and the aperture of the hollow part is 60 mm, which is the same as the aperture of the third discharge gate 326. The rotating turntable 32 is located in the first card slot 36 of the central turntable 34. Its function is to fix and drive the upper ball milling tank 31 to rotate clockwise. The function of the hollow part is to communicate with the third discharge gate 326 to enable the powder with the target grinding fineness to smoothly enter the automatic discharging system 4. There are buckles around the card slot. The buckle height is 180 mm and the thickness is 2 mm. Its function is to fix the upper ball milling tank 31.

[0069] Further, the central turntable 34 in this embodiment is cylindrical, with four first card slots 36 on its upper surface. The height of the central turntable 34 is 50 mm, the diameter is 700 mm, the height of the first card slot 36 is 20 mm, and the diameter is 124 mm. The distance from the center of each first card slot 36 to the edge of the central turntable 34 is 100 mm. The center of each first card slot 36 has a second central hole 35, and the material is all stainless steel. The central turntable 34 is located in the second card slot 310 at the top of the drive system 38, and its function is to drive the entire ball milling system 3 to make a revolution. The rotation direction is counterclockwise. The function of the circular hollow part is to enable the powder with the target grinding fineness to smoothly enter the automatic discharging system 4.

[0070] Further, the appearance of the drive system 38 in this embodiment is in the shape of a cuboid, with a length of 1000 mm, a width of 700 mm, and a height of 150 mm. There is a first discharge port 39 at the central position, which is in the shape of a funnel, with a top opening diameter of 640 mm, a bottom opening diameter of 300 mm, and a funnel height of 100 mm. The function of the drive system 38 is to precisely adjust the revolution and rotation speeds (i.e., the speeds of the central turntable 34 and the rotating turntable 32), and it is the working core of the entire ball milling system 3. The drive system 38 is internally equipped with a reduction device, and its function is to match the speed ratio of rotation to revolution = 2:3 and ensure the movement stability. Since the revolution and rotation drives themselves are existing technologies, the specific structure of the drive system 38 will not be elaborated here.

[0071] Further, the cooling system 37 in this embodiment is in the shape of a cuboid, located at both ends of the motor, and there are two in total, with a length of 1000 mm, a width of 150 mm, and a height of 150 mm. The function of the cooling system 37 is to cool the motor, the central turntable 34, and the rotating turntable 32 during operation through the water-cooled sandwich and air-cooled methods, and control the grinding temperature rise.

[0072] The automatic discharging system 4 in this embodiment is as Figure 13 shown, and it includes a discharging box 42, a second discharge port 46, a vibrating baffle 43, a vibrating rod 44, a vibrating motor 45, and a conveyor track 41. Four feeding ports are provided at the top of the discharging box 42, and the four feeding ports respectively correspond to the four ball milling tanks 31. Two inclined vibrating baffles 43 are arranged inside the discharging box 42. The vibrating baffle 43 is driven by the vibrating rod 44 and the vibrating motor 45. The bottom of the two vibrating baffles 43 is the conveyor track 41. One side of the conveyor track 41 is the second discharge port 46. The specific structures of each part are as follows:

[0073] Among them, the discharging box 42 is in the shape of a cuboid, with a length of 1000 mm, a width of 1000 mm, and a height of 500 mm, and the wall thickness of the box is 9 mm. Its function is to form a closed space to prevent the powder falling from the third discharging gate 326 in the ball milling system 3 from entering the air in the form of dust, causing unnecessary powder loss and air pollution.

[0074] Among them, the second discharge port 46 is in the shape of an inverted quadrangular prism, with a column height of 200 mm, the side is a rhombus, and the side length is 100 mm. Its function is to discharge the powder with the target grinding fineness from the machine.

[0075] Among them, the vibration baffle 43 is rectangular, with a total of two pieces, 1000 mm long, 600 mm wide, and 5 mm thick. Its function is to collect and converge the scattered powder with the target grinding fineness on the conveyor track 41.

[0076] Among them, the vibration rod 44 is cylindrical, with a diameter of 20 mm and a length of 100 mm. There are two in total. The bottom is connected to the vibration motor 45, and the top is connected to the vibration baffle 43. Its function is to transmit the vibration effect of the vibration motor 45 to the vibration baffle 43.

[0077] Among them, the vibration motor 45 is cube-shaped, with a side length of 30 mm. There are two in total. Its function is to generate a vibration effect and transmit the vibration effect to the vibration baffle 43 through the vibration rod 44, so that the powder with the target grinding fineness scattered on the vibration baffle 43 slides onto the conveyor track 41 through the vibration effect.

[0078] Among them, the conveyor track 41 is rectangular, 1000 mm long and 200 mm wide, and slides from the inside to the second discharge port 46. Its function is to transport the powder with the target grinding fineness that has slid onto the conveyor track 41 out of the equipment.

[0079] Furthermore, the above-mentioned ball mill as a whole is made of stainless steel, the ball mill tank 31 as a whole is made of the super-hard material tungsten carbide, the material of the ball mill beads 324 is stainless steel ball mill beads 324 or agate grinding balls, and the material of the screen 323 in the ball grinding layer is the super-hard material tungsten carbide.

[0080] The specific working process of the above-mentioned automatic ball mill disclosed in this embodiment is as follows:

[0081] I. Startup preparation

[0082] 1. System self-check

[0083] (1) The control system 5 starts the self-check program to confirm that the states of all components (electric control gate, sensor, motor, cooling system 37) are normal.

[0084] (2) Check the proportion of the ball mill beads 324 in the ball mill tank 31 (10 mm:5 mm:2 mm = 1:2:4) and the specification of the screen 323 (matched according to the target fineness).

[0085] 2. Parameter setting

[0086] (1) Revolution speed: Set according to the hardness of the material (such as 400 rpm for metal powder and 600 rpm for ceramic powder).

[0087] (2) Rotation speed ratio of self-rotation to revolution: Fixed at 2:3 (counterclockwise for self-rotation and clockwise for revolution).

[0088] (3) Grinding target weight: Set the single grinding amount through an annular weighing sensor (such as 500g per can).

[0089] II. Automatic feeding process

[0090] 1. Loading of the feeding box 15

[0091] (1) Pour the dried materials (such as basalt, steel slag, coal gangue, etc.) into the funnel-shaped feeding box 15, and the materials in the box naturally fall to the bottom opening by gravity.

[0092] 2. Opening of the first discharge gate 12

[0093] (1) The control system 5 sends a discharge instruction, and the first discharge gate 12 opens downward along the vertical central axis to release a quantitative amount of materials into the four-way sieve material conduit 14.

[0094] (2) The opening and closing time of the first discharge gate 12 is dynamically adjusted according to the material density (such as extending by 0.5 seconds for light materials).

[0095] 3. Four-way sieve material distribution

[0096] (1) The materials are evenly divided into four paths through the four-way sieve material conduit 14, and the error of each path is ≤2% (optimized distribution through the diversion grooves on the inner wall of the conduit).

[0097] (2) The second discharge gate 16 is synchronously opened to introduce the four-path materials into the four sub-tubes of the ball mill cover system 17.

[0098] 4. Sealing of the cover system 17

[0099] (1) The telescopic silo 13 extends to press the inverted funnel-shaped cover system 17 tightly against the top of the ball mill tank 31 to ensure airtightness.

[0100] (2) The fourth discharge gate 327 opens downward along the vertical central axis to release the materials to the grinding layer of the ball mill tank 31, and the opening and closing time of the fourth discharge gate 327 is 15s.

[0101] (3) After the fourth discharge gate 327 is closed, the telescopic silo 13 contracts to lift the inverted funnel-shaped cover system 17 from the top of the ball mill tank 31.

[0102] (4) At the same time, send a command to the control system 5 to repeat the above feeding process, and start the motor of the ball mill system 3 and the cooling system 37 to work.

[0103] III. Ball mill grinding process

[0104] 1. Start the ball milling system 3

[0105] (1) The motor drives the central turntable 34 to revolve counterclockwise, and at the same time, the rotating turntable 32 rotates clockwise with a speed ratio of 2:3.

[0106] (2) Start the cooling system 37: The water-cooled sandwich layer (flow rate 10 L / min) and the air-cooled fan operate synchronously to control the temperature ≤ 50°C.

[0107] 2. Impact and grinding

[0108] (1) The ball milling beads 324 form a dynamic collision-shear network under the action of centrifugal force:

[0109] Large ball milling beads 324: High-speed impact to break large particles; Small ball milling beads 324: Rolling friction to refine to the target particle size.

[0110] (2) The ball milling layer sieve 323 separates the qualified (meeting the specified particle size) powder in real time: Start the adsorber 328, and the fan generates negative pressure to suck the fine powder into the sieve 323.

[0111] 3. Storage and weighing

[0112] (1) The fine powder converges to the center of the third discharge gate 326 through the funnel-shaped storage bin 329 (height 50 mm) and is evenly distributed with the assistance of centrifugal force.

[0113] (2) The annular weighing sensor 3210 in the control layer monitors the powder weight at the gate in real time. When the preset value is reached: Send a signal to the control system 5 to stop ball milling and open the gate for discharging.

[0114] (3) At the same time, the automatic feeding system 1 starts to work to achieve automatic feeding. After the control system 5 receives the signal that the discharging is completed, it triggers the automatic feeding system 1 to load the next batch of materials, and the whole process requires no manual intervention.

[0115] IV. Automatic discharging process

[0116] 1. Powder discharge

[0117] (1) Open the electric discharge gate, and the fine powder enters the discharging system through the hollow part (diameter 60 mm) of the rotating turntable 32.

[0118] (2) The discharge gate opens synchronously, and the powder falls into the discharge box 42 (hermetically designed, dust-proof efficiency ≥ 99%).

[0119] 2. Vibration collection

[0120] (1) Start the vibration motor 45, and transmit the vibration to the vibration baffle 43 through the vibration rod 44, with an amplitude of 5 mm and a frequency of 30 Hz to ensure that the powder slides onto the conveyor track 41.

[0121] (2) The conveyor belt 41 transports the powder to the second discharge port 46 (in the shape of an inverted quadrangular prism with a side length of 100 mm) at a speed of 0.2 m / s.

[0122] V. Shutdown and Maintenance

[0123] 1. Cooling and Cleaning

[0124] (1) After the grinding is completed, the cooling system 37 runs continuously for 10 minutes until the equipment temperature drops below 30°C.

[0125] (2) Disassemble the ball mill tank 31 and clean the tungsten carbide tank body 321 and the screen 323 using an ultrasonic cleaner (frequency 40 kHz).

[0126] 2. Wear Inspection

[0127] (1) Regularly (every 100 hours) detect the diameter of the ball mill beads 324 (the wear rate of the stainless steel ball mill beads 324 ≤ 0.1 mm / 100 h, and that of the agate beads ≤ 0.05 mm / 100 h).

[0128] (2) Replace the deformed screen 323 (the service life of the stainless steel is about 2000 hours).

[0129] The above automatic ball mill realizes a comprehensive improvement in efficiency, precision, and cleanliness through four core technologies: intelligent material distribution, closed-loop control, negative pressure adsorption, and dynamic parameter adjustment, with remarkable economic, social, and environmental benefits. Its innovation not only solves the pain points of traditional equipment but also promotes the upgrading of China's high-end powder equipment manufacturing technology.

[0130] Through the above structure, this embodiment can achieve technical effects in multiple aspects, specifically as follows:

[0131] Improved grinding efficiency: Four-way equal distribution technology of the quartering sieve material conduit 14: The material is evenly distributed to the four ball mill tanks 31 through four sub-material pipes (error ≤ 2%), reducing the quality difference within batches, avoiding the ±10% error of manual material distribution, and shortening the single grinding time by 20% - 30%.

[0132] Dynamic parameter adjustment: The control system 5 automatically optimizes the rotation speed according to the material hardness (such as 400 rpm for metal powder and 600 rpm for ceramic powder) and the real-time temperature (controlled ≤ 50°C), avoiding over-grinding or under-grinding, and improving the grinding efficiency by 35%.

[0133] Closed-loop negative pressure adsorption: The screen 323 and the adsorber 328 collect qualified fine powder in real time (such as the D90 particle size fluctuation < 5%), reducing repeated grinding and lowering the energy consumption by 15% - 20%.

[0134] (2) Breakthrough in Precision and Consistency

[0135] ​

[0136] Optimize the ratio of ball mill beads 324 (10mm:5mm:2mm = 1:2:4): The large ball mill beads 324 impact and break large particles, and the small ball mill beads 324 are refined to the nanoscale (such as 1μm). Combined with the tungsten carbide screen 323 (with adjustable pore size), the standard deviation of particle size distribution is compressed from ±15% of traditional equipment to ±5%.

[0137] Closed-loop control of ring load cell: Real-time monitor the powder weight of the storage layer, automatically stop discharging after reaching the preset value (such as 500g), and the output error between batches ≤1%, far exceeding the ±10% of manual control.

[0138] (3) Pollution control and safety

[0139] Fully enclosed system: From feeding (funnel sealed) to discharging (dust-proof efficiency ≥99%), the dust leakage rate <0.1ppm, meeting the GMP cleanliness standard.

[0140] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automated ball mill, characterized in that, Comprising: An automatic feeding system, which includes a feeding box, a material distributing telescopic structure, and a capping system connected in sequence from top to bottom. The material distributing telescopic structure includes a first discharging gate, a telescopic bin, a screening duct, and a second discharging gate arranged from top to bottom. The telescopic bin drives the capping to move up and down to achieve the sealing of the ball milling system; A ball milling system, which includes a driving system and a central turntable, a self-rotating turntable, and a ball milling tank driven by the driving system. A plurality of self-rotating turntables are arranged on the central turntable, and a ball milling tank is installed on each self-rotating turntable. The plurality of ball milling tanks are arranged below the material distributing telescopic structure. The ball milling tank includes a tank body, and a fourth discharging gate is arranged at the top of the tank body. The upper part of the tank body is a ball milling chamber, and the lower part is a storage bin. A plurality of ball milling beads with different particle sizes are arranged inside the ball milling chamber. An annular screen is arranged at the center of the ball milling chamber, and an adsorber is arranged inside the annular screen. The storage bin is located below the annular screen, and a weighing sensor and a third discharging gate are installed at the bottom of the storage bin; The particle size ratio of the ball milling beads is 1:2:4; When the fourth discharging gate is opened, the material is released into the ball milling chamber of the ball milling tank. After the fourth discharging gate is closed, the telescopic bin contracts to lift the capping system from the top of the ball milling tank; An automatic discharging system, which is arranged below the storage bin; A control system, which controls the automatic feeding system, the ball milling system, and the automatic discharging system; The weighing sensor of the control system monitors the powder weight in real time. When the preset value is reached, a signal is sent to the control system to stop ball milling, and the third discharging gate is opened for discharging. The fine powder enters the automatic discharging system; The automatic discharging system includes a discharging box, and two inclined vibrating baffles are arranged inside the discharging box. A conveying track is arranged at the bottom of the two vibrating baffles, and a discharging port is arranged on one side of the conveying track; The two inclined vibrating baffles are arranged oppositely, the conveying track is located between the vibrating baffles and at the bottom of the discharging box; The bottom of the vibrating baffle is a vibrating rod, and the vibrating rod is driven by a vibrating motor.

2. The automated ball mill according to claim 1, wherein The ball milling system further includes a cooling system.

3. The automated ball mill according to claim 2, wherein, The cooling system is located at the discharging port position of the ball milling system.

4. The automated ball mill according to claim 1, wherein, The plurality of self-rotating turntables are evenly arranged along the circumferential direction of the central turntable.

5. The automated ball mill according to claim 1, wherein The capping system is conical, and the feeding box is inverted conical.

6. The automated ball mill according to claim 1, wherein, A material distributing sub-duct is arranged inside the capping system, and the material distributing sub-duct connects the screening duct and the ball milling tank.

7. The control method of the automatic ball mill according to any one of claims 1-6, characterized in that, As follows: Pour the material into the feeding box, open the first discharging gate to release a fixed amount of material to the screening duct, and at the same time open the second discharging gate to introduce the material into the feeding pipe of the capping system of the ball mill; The telescopic bin extends to press the capping system tightly to the top of the ball milling tank to ensure airtightness; Open the fourth discharging gate to release the material into the ball milling chamber of the ball milling tank; After the fourth discharging gate is closed, the telescopic bin contracts to lift the capping system from the top of the ball milling tank; At the same time, a command is sent to the control system to repeat the above feeding process, and the central turntable, the self-rotating turntable, and the cooling system of the ball milling system are started to work; The ball milling beads form dynamic collisions and shear the annular screen under the action of centrifugal force; The annular screen separates qualified powder in real time: the adsorber generates negative pressure to suck the fine powder into the annular screen, and then converges to the center of the third discharge gate through the storage layer and is evenly distributed with the assistance of centrifugal force; The weighing sensor of the control system monitors the powder weight in real time. When the preset value is reached, a signal is sent to the control system to stop ball milling, and the third discharge gate is opened for discharging. The fine powder enters the automatic discharging system. At the same time, the automatic feeding system starts to work to achieve automatic feeding. After the control system receives the signal of discharging completion, it triggers the automatic feeding system to load the next batch of materials.

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