Automatic ball mill and control method

Abstract

The invention belongs to the field of ball mills, and particularly discloses an automatic ball mill and a control method, and the automatic ball mill comprises an automatic feeding system, a ball milling system, an automatic discharging system and a control system. The ball-milling system comprises a driving system, and a central turntable, autorotation turntables and ball-milling tanks which are driven by the driving system, a plurality of autorotation turntables are arranged on the central turntable, each autorotation turntable is provided with one ball-milling tank, the plurality of ball-milling tanks are arranged below the material distribution telescopic structure, each ball-milling tank comprises a tank body, and the tank body is provided with a plurality of ball-milling tanks; a fourth discharging gate is arranged at the top of the tank body, a ball milling cavity is formed in the upper part of the tank body, a storage bin is arranged at the lower part of the tank body, a plurality of ball milling beads with different particle sizes are arranged in the ball milling cavity, an annular screen is arranged in the center of the ball milling cavity, an adsorption machine is arranged in the annular screen, the storage bin is positioned below the annular screen, and a weighing sensor and a third discharging gate are mounted at the bottom of the storage bin; the automatic discharging system is arranged at the lower part of the storage bin; and the control system controls the automatic feeding system, the ball milling system and the automatic discharging system.

Description

Technical Field

[0001] The invention relates to the field of ball mills, and in particular to an automatic ball mill and a control method thereof. Background Art

[0002] Planetary ball mills are widely used in the chemical, pharmaceutical, construction, pigment and other industries. They achieve efficient abrasion and fine grinding of materials through a rotating cylinder and internal grinding media (usually steel balls). At present, some automated planetary ball mills are disclosed in the prior art, such as CN119076136A discloses an automated system suitable for planetary ball mills, CN119076143A discloses an automatic feeding device suitable for planetary ball mills, and CN119076144A discloses an alternating feeding structure suitable for planetary ball mills. However, the automated planetary ball mills proposed in the prior art still have the following deficiencies: First, the particle size control accuracy is lacking. The existing process chain is forced to adopt a two-stage processing mode of "grinding first and then screening". The ground product must go through an additional screening process or offline particle size detection to achieve particle size screening, resulting in redundant process flow and increased energy consumption.

[0003] Second, the process parameters are too dependent 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 is heavily dependent on the operator's skill level.

[0004] Third, separation efficiency restricts capacity expansion. Traditional separation processes are mainly manual, supplemented by vibrating screens or magnetic separation devices, which not only increases equipment investment costs, but also forms an efficiency bottleneck in the production process. Especially in continuous production scenarios, this defect seriously affects grinding efficiency and reduces production capacity. Summary of the invention

[0005] 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 realize in-situ separation and achieve closed-loop control of particle size control-grinding time-separation efficiency.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows: In the first aspect, the present invention provides an automated ball mill, which is specifically as follows, comprising: The automatic feeding system includes a feeding box, a material distribution telescopic structure, and a sealing cover connected in sequence from top to bottom. The material distribution telescopic structure includes a first discharge gate, a telescopic silo, a screening material conduit, and a second discharge gate arranged from top to bottom. The telescopic structure drives the sealing cover to move up and down to achieve sealing of the ball mill system. A ball mill system, comprising a driving system and a central turntable driven by the driving system, a self-rotating turntable, and a ball milling tank, wherein a plurality of self-rotating turntables are arranged on the central turntable, a ball milling tank is installed on each self-rotating turntable, and the plurality of ball milling tanks are arranged below the material distribution telescopic structure, the ball milling tank comprises a tank body, a fourth discharge gate is arranged on the top of the tank body, the upper part of the tank body is a ball milling chamber, the lower part is a storage bin, a plurality of ball milling beads of different particle sizes are arranged inside the ball milling chamber, an annular screen is arranged in the center of the ball milling chamber, an adsorption machine is arranged inside the annular screen, the storage bin is located below the annular screen, and a weighing sensor and a third discharge gate are installed at the bottom of the storage bin; An automatic discharging system is arranged at the bottom of the storage bin; Control system, which controls the automatic feeding system, ball milling system and automatic discharging system; As a further technical solution, the automatic discharging system includes a discharging box, two inclined vibrating baffles are arranged inside the discharging box, a conveying belt is arranged at the bottom of the two vibrating baffles, and a discharging port is arranged on one side of the conveying belt.

[0007] As a further technical solution, two inclined vibration baffles are arranged opposite to each other, and the conveying crawler is located between the vibration baffles and at the bottom of the discharge box.

[0008] 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.

[0009] As a further technical solution, the ball milling system also includes a cooling system.

[0010] As a further technical solution, the cooling system is located at the discharge port of the ball milling system. As a further technical solution, the plurality of self-rotating turntables are evenly arranged along the circumferential direction of the central turntable.

[0011] As a further technical solution, the capping system is conical and the feed box is inverted conical.

[0012] As a further technical solution, a material distribution sub-pipe is arranged inside the capping system, and the material distribution sub-pipe connects the screening conduit and the ball mill tank.

[0013] In a second aspect, the present invention also provides a control method for an automated ball mill, which is as follows: Pour the material into the feed box, open the first discharge gate, release the quantitative material into the screening conduit, and at the same time open the second discharge gate to guide the material into the conveying pipe of the ball mill capping system; The retractable silo extends to press the capping system to the top of the ball mill to ensure air tightness; The fourth discharge gate is opened to release the material into the ball milling chamber of the ball mill; After the fourth discharge gate is closed, the retractable silo shrinks and lifts the capping system from the top of the ball mill. At the same time, a command is sent to the control system to repeat the above feeding process, and the central turntable, self-rotating turntable and cooling system of the ball mill system are started to work. The ball mill beads form dynamic collision and shear annular screens under the action of centrifugal force. The annular screen separates qualified powder in real time: the adsorption machine generates negative pressure, sucks the fine powder into the annular screen, and then gathers to the center of the third discharge gate through the storage layer, and is evenly distributed with the help of centrifugal force; The weighing sensor of the control system monitors the weight of the powder in real time. When the preset value is reached, a signal is sent to the control system to stop the ball milling and open the third discharge gate to discharge the material. The fine powder enters the automatic discharging system. At the same time, the automatic feeding system starts working to realize automatic feeding. After the control system receives the discharge completion signal, it triggers the automatic feeding system to load the next batch of materials.

[0014] The beneficial effects of the present invention are as follows: 1. The target powder particle size is precisely controllable. The ball mill system of the present invention is equipped with a ring screen and an adsorbent with a specified target particle size in the ball mill. The ring screen and the adsorbent cooperate with each other and form a closed-loop negative pressure adsorption system together with the control system, which can adsorb and collect powders that reach the target fineness during the grinding process.

[0015] Second, the entire grinding process does not require manual operation and estimation of ball milling time. The closed-loop negative pressure adsorption system and the weighing sensor of the storage layer realize weight closed-loop feedback, collect the powder that reaches the target fineness in real time, and effectively avoid process abnormalities such as under-grinding, over-grinding and reverse grinding.

[0016] 3. Increased production capacity. The whole set of equipment is equipped with the automatic feeding system, ball milling system, automatic discharging system and control system adapted to the ball mill, which can realize fully automated operation and closed-loop optimization of particle size control-grinding time-separation efficiency. The effect of increased production capacity is achieved through particle size consistency and real-time separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The overall structural schematic diagram of the automated ball mill proposed by the present invention; Figure 2 A top view of the automated ball mill provided by the present invention; Figure 3A front view of the automated ball mill provided by the present invention; Figure 4 A rear view of the automated ball mill provided by the present invention; Figure 5 The right side view of the automatic ball mill proposed by the present invention; Figure 6 The left side view of the automatic ball mill proposed by the present invention; Figure 7 A schematic diagram of the automatic feeding system proposed by the present invention; Figure 8 A top view of the feed box provided by the present invention; Fig. 9 A bottom view of the capping system provided by the present invention; Fig.10 A schematic diagram of the material splitting and telescopic structure proposed by the present invention; Fig.11 Schematic diagram of the ball milling system proposed in the present invention; Fig.12 A schematic diagram of a ball mill according to the present invention; Fig.13 Schematic diagram of the automatic discharging system proposed by the present invention; In the figure: 1. Automatic feeding system; 2. Support frame; 3. Ball milling system; 4. Automatic discharging system; 5. Control system; 11. Material distribution telescopic structure; 12. First discharge gate; 13. Telescopic silo; 14. Quarter screening guide tube; 15. Feed box; 16. Second discharge gate; 17. Capping system; 31. Ball milling jar; 32. Rotating turntable; 33. First center hole; 34. Center turntable; 35. Second center hole; 36. First slot; 37. Cooling system, 38. .Drive system, 39. First discharge port; 310. Second card slot; 321. Tank; 322. Upper packaging plate; 323. Screen; 324. Ball milling beads; 325. Signal sensor; 326. Third discharge gate; 327. Fourth discharge gate; 328. Adsorption machine; 329. Storage bin; 3210. Ring weighing sensor; 41. Conveyor track; 42. Discharge box; 43. Vibration baffle; 44. Vibration rod; 45. Vibration motor; 46. Second discharge port; DETAILED DESCRIPTION It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation 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 skilled in the art to which the present invention belongs.

[0018] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof; For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0019] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and the like 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 whole; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0020] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present invention proposes an automated ball mill and a control method.

[0021] This embodiment discloses an automated ball mill, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, from top to bottom are automatic feeding system 1, ball milling system 3, automatic discharging system 4, control system 5; automatic feeding system 1, ball milling system 3, automatic discharging system 4, control system 5 are installed on the support frame 2; The automatic feeding system 1 comprises a feeding box, a material distribution telescopic structure, and a capping system connected in sequence from top to bottom. The material distribution telescopic structure comprises a first discharge gate, a telescopic silo, a screening material conduit, and a second discharge gate arranged from top to bottom. The telescopic structure drives the capping to move up and down to achieve sealing of the ball mill system. A ball mill system 3, comprising a driving system and a central turntable, a self-rotating turntable and a ball milling tank driven by the driving system, wherein a plurality of self-rotating turntables are arranged on the central turntable, each self-rotating turntable is equipped with a ball milling tank, and the plurality of ball milling tanks are arranged below the material distribution telescopic structure, the ball milling tank comprises a tank body, a fourth discharge gate is arranged on the top of the tank body, the upper part of the tank body is a ball milling chamber, the lower part of the tank body is a storage bin, a plurality of ball milling beads of different particle sizes are arranged inside the ball milling chamber, an annular screen is arranged in the center of the ball milling chamber, an adsorption machine is arranged inside the annular screen, the storage bin is located below the annular screen, a weighing sensor and a third discharge gate are installed at the bottom of the storage bin; An automatic discharging system 4 is arranged at the lower part of the storage bin; The control system 5 controls the automatic feeding system, the ball milling system and the automatic discharging system.

[0022] The ball mill system 3 of the present invention is equipped with a designated target particle size annular screen and an adsorbent in the ball mill, which together with the control system constitute 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 realize weight closed-loop feedback, and collects powders reaching the target fineness in real time, effectively avoiding process abnormalities such as under-grinding, over-grinding and reverse grinding.

[0023] Specifically, the automatic feeding system 1 in this embodiment is as follows Figure 7 As shown, it includes a feed box 15, a material distribution telescopic structure 11, and a capping system 17; wherein the feed box 15 is funnel-shaped, the material distribution telescopic structure 11 is cylindrical, and the capping system 17 is in an inverted funnel shape; the feed box 15, the material distribution telescopic structure 11 and the capping system 17 are connected in sequence from top to bottom; the material distribution telescopic structure 11 includes a first discharge gate 12, a telescopic bin 13, a four-part screening conduit 14, and a second discharge gate 16 arranged from top to bottom, and the telescopic bin 13 drives the capping system 17 to move up and down to achieve sealing of the ball mill system 3; Further, the above-mentioned feed box 15 is as follows Figure 8 As shown, the top opening diameter is 800mm, the bottom opening diameter is 300mm, the height of the feed box 15 is 600mm, and the box wall thickness is 9mm. Its function is to store the dried material to be ground; Furthermore, the above-mentioned material distribution telescopic structure 11 is as follows Fig.10As shown, the material discharging telescopic structure 11 is cylindrical, and the top and bottom opening diameters are 300 mm, including a first discharging gate 12, a telescopic silo 13, a four-part screening material conduit 14, and a second discharging gate 16; the first discharging gate 12 is installed at the junction of the telescopic silo 13 and the feed box 15. The function of the first discharging gate 12 is to introduce the material into the telescopic silo 13. The first discharging gate 12 is opened downward by the vertical central axis of the automatic feeding system 1 to control the quality of each batch of materials to be ground entering the ball milling layer. The wall thickness of the first discharge gate 12 is 7 mm; the retractable silo 13 buffers the material and controls the distance between the entire automatic feeding system 1 and the ball mill system 3 through telescopic action, and controls the ball mill capping system 17 to seal the ball mill jar 31, while ensuring that the material to be ground in the quartering screening material duct 14 effectively and smoothly enters the ball mill jar 31 for grinding; the retractable silo 13 itself is made of a foldable and retractable soft material, and is driven to retract or unfold by a plurality of telescopic rods.

[0024] Furthermore, the wall thickness of the quartered screening conduit 14 is 9 mm, and its function is to evenly divide each batch of materials to be ground into four parts, thereby effectively reducing the quality difference of the materials entering each ball mill 31 ; the quartered screening conduit 14 corresponds to four ball mills 31 .

[0025] Furthermore, the function of the second discharge gate 16 is to introduce the material in the four-division screening duct 14 into the four distribution sub-tubes. The second discharge gate 16 is opened downward by the vertical central axis of the automatic feeding system 1 to control the quality of each batch of materials to be ground entering the ball milling layer. The wall thickness of the second discharge gate 16 is 7 mm.

[0026] Further, such as Fig. 9 As shown, the ball mill capping system 17 is in the shape of an inverted funnel, with a top opening diameter of 300mm, a bottom opening diameter of 800mm, and an outer shell thickness of 9mm. Four material distribution sub-tubes are arranged inside, corresponding to the four screening material ducts 14 respectively. The bottom opening diameter of the four material distribution sub-tubes is 150mm, and the wall thickness of the four material distribution sub-tubes is 9mm.

[0027] Specifically, the automatic ball milling system 3 in this embodiment is as follows: Fig.11 , Fig.12As shown, it includes a ball mill 31, a self-rotating turntable 32, a central turntable 34, a motor, a speed reducer, 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 arranged at the center of each self-rotating turntable 32, a ball mill 31 is installed on the first central hole 33, and a plurality of ball mills 31 are arranged below the material distribution telescopic structure 11. In this embodiment, there are four ball mills 31, and the four ball mills 31 are located above the self-rotating turntable 32. Each ball mill 31 includes a tank body 321, and a fourth discharge gate 327 is arranged on the top of the tank body 321. The upper part of the tank body 321 is a ball milling cavity, and the lower part is a storage bin 329. An annular screen 323 is arranged in the center of the ball milling cavity, an adsorption machine 328 is arranged inside the annular screen 323, and 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; That is, the ball mill 31 of the automated planetary ball mill in this embodiment is divided into three layers, such as Fig.12 As shown, they are respectively a ball milling layer, a storage layer and a control layer, wherein the ball milling layer is 120 mm high, the storage layer is 50 mm high, and the control layer is 30 mm high, and the ball mill 31 is cylindrical with a diameter of 120 mm; more specifically: the ball milling layer in this embodiment includes a ball milling chamber, a ring screen 323 is arranged in the center of the ball milling chamber, and an adsorption machine 328 is arranged inside the ring screen 323; a plurality of ball milling beads 324 with different particle sizes are arranged on the outside of the ring screen 323, that is, there are ball milling beads 324 with different particle sizes in the ball milling layer; specifically, the ratio 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 nanometer level (such as 1 μm), combined with the tungsten carbide screen 323 (with adjustable aperture), the standard deviation of the particle size distribution is compressed from ± 15% of the traditional equipment to ± 5%.

[0028] Furthermore, the annular screen 323 is a detachable screen 323 of a specified caliber (replaceable according to the target grinding fineness size), the upper packaging plate 322 of the screen 323 also has the same particle size as the side, and an adsorbent 328 is placed in the middle of the screen 323. The adsorbent 328 is placed in the center of the upper packaging plate 322 of the screen 323. The adsorbent 328 mainly drives the fan to rotate through the motor to generate negative pressure and form airflow; when the adsorbent 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 will cause the higher-pressure air outside the screen 323 to be sucked in, thereby sucking the powder with a particle size smaller than the size of the sieve hole into the screen 323, achieving the effect of collecting the powder with the target grinding fineness; Furthermore, the overall outer wall of the storage layer is funnel-shaped, including a storage bin 329. The main function of the storage bin 329 is to collect the target grinding fineness powder in the screen 323 in the ball mill layer. In order to evenly distribute the scattered target grinding fineness powder, the scattered target grinding fineness powder is gathered at the center of the third discharge gate 326 in the form of an hourglass, and evenly distributed to the third discharge gate 326 through the centrifugal force generated during the rotation of the ball mill. Furthermore, the control layer is mainly equipped with an annular weighing sensor 3210, whose main function is to sense the weight of the target grinding fineness powder in the storage bin 329. When the weight is equal to the feed weight, the signal sensor 325 on the annular weighing sensor 3210 sends a stop rotation signal to the control system 5, and opens the third discharge gate 326 to discharge the target grinding fineness powder in the storage layer into the automatic discharging system 4. At the same time, the control system 5 sends a feeding instruction to allow the material in the automatic feeding system 1 to enter the ball milling layer.

[0029] Furthermore, the self-rotating turntable 32 in this embodiment is annular, and the circular hollow part is connected to the third discharge gate 326. It is made of stainless steel, and there are four of them. The height of the self-rotating turntable 32 is 20mm, the diameter is 124mm, and the diameter of the hollow part is 60mm, which is the same as the diameter of the third discharge gate 326. The self-rotating turntable 32 is located in the first card slot 36 of the central turntable 34, and its function is to fix and drive the upper ball mill 31 to do clockwise self-rotation; the role of the hollow part is to connect the third discharge gate 326, so that the target grinding fineness powder can smoothly enter the automatic discharge system 4. There are buckles around the card slot, the buckle height is 180mm, the thickness is 2mm, and its function is to fix the upper ball mill 31.

[0030] Furthermore, the center turntable 34 in this embodiment is cylindrical, and four first slots 36 are provided on the upper surface. The center turntable 34 is 50 mm high and 700 mm in diameter. The first slots 36 are 20 mm high and 124 mm in diameter. The distance from the center of each first slot 36 to the edge of the center turntable 34 is 100 mm. The center of each first slot 36 has a second center hole 35, and the material is stainless steel. The center turntable 34 is located in the second slot 310 at the top of the drive system 38. Its function is to drive the entire ball mill system 3 to perform orbital motion in a counterclockwise direction. The function of the circular hollow part is to allow the target grinding fineness powder to smoothly enter the automatic discharging system 4.

[0031] Furthermore, the driving system 38 in this embodiment is in the shape of a rectangular parallelepiped, with a length of 1000mm, a width of 700mm and a height of 150mm. A first discharge port 39 is provided at the center, which is in the shape of a funnel, with a top opening diameter of 640mm, a bottom opening diameter of 300mm, and a funnel height of 100mm. The function of the driving system 38 is to accurately adjust the revolution and rotation speeds (i.e., the speeds of the center turntable 34 and the rotation turntable 32). It is the working core of the entire ball milling system 3. The driving system 38 is equipped with a reduction device inside, and its function is to match the speed ratio of rotation to revolution = 2:3 and ensure the stability of movement. Because the revolution and rotation drive itself is a prior art, the specific structure of the driving system 38 will not be repeated here.

[0032] Furthermore, the cooling system 37 in this embodiment is in the shape of a rectangular parallelepiped and is located at both ends of the motor. There are two of them, which are 1000 mm long, 150 mm wide and 150 mm high. The function of the cooling system 37 is to cool the motor, the center turntable 34 and the rotating turntable 32 during operation through water-cooled interlayers and air cooling to control the grinding temperature rise.

[0033] The automatic discharging system 4 in this embodiment is as follows Fig.13 As shown, it includes a discharge box 42, a second discharge port 46, a vibration baffle 43, a vibration rod 44, a vibration motor 45, and a conveyor belt 41; four feed ports are arranged on the top of the discharge box 42, and the four feed ports correspond to four ball mills 31 respectively; two obliquely arranged vibration baffles 43 are arranged inside the discharge box 42, and the vibration baffles 43 are driven by the vibration rod 44 and the vibration motor 45, and the bottom of the two vibration baffles 43 is the conveyor belt 41; one side of the conveyor belt 41 is the second discharge port 46; the specific structure of each part is as follows: The discharge box 42 is in the shape of a rectangular parallelepiped, with a length of 1000 mm, a width of 1000 mm, a height of 500 mm, and a box wall thickness of 9 mm. Its function is to form a closed space to prevent the powder dropped from the third discharge gate 326 in the ball mill system 3 from entering the air in the form of dust, causing unnecessary powder loss and air pollution.

[0034] The second discharge port 46 is in the shape of an inverted quadrangular prism with a height of 200 mm and a diamond-shaped side with a side length of 100 mm. Its function is to discharge the powder with the target grinding fineness out of the machine.

[0035] The vibration baffle 43 is rectangular in shape, with two pieces, 1000 mm long, 600 mm wide and 5 mm thick, and its function is to collect the scattered target grinding fineness powder and gather it on the conveyor belt 41.

[0036] The vibration rod 44 is cylindrical, with a diameter of 20 mm and a length of 100 mm. There are two of them, with the bottom connected to the vibration motor 45 and the top connected to the vibration baffle 43 . Its function is to transmit the vibration effect of the vibration motor 45 to the vibration baffle 43 .

[0037] The vibration motor 45 is in the shape of a cube with a side length of 30 mm. There are two of them. Their 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 target grinding fineness powder scattered on the vibration baffle 43 slides onto the conveyor track 41 through the vibration effect.

[0038] The conveyor belt 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 of target grinding fineness that slides onto the conveyor belt 41 out of the equipment.

[0039] Furthermore, the ball mill is made of stainless steel as a whole, the ball mill 31 is made of superhard tungsten carbide as a whole, the ball mill beads 324 are made of stainless steel ball mill beads 324 or agate grinding balls, and the screen 323 in the ball mill layer is made of superhard tungsten carbide.

[0040] The specific working process of the above-mentioned automated ball mill disclosed in this embodiment is as follows: 1. Startup Preparation 1. System self-check (1) The control system 5 starts the self-check procedure to confirm that the status of each component (electrically controlled gate, sensor, motor, cooling system 37) is normal.

[0041] (2) Check the ratio of the ball mill beads 324 in the ball mill 31 (10 mm: 5 mm: 2 mm = 1:2:4) and the specifications of the screen 323 (matched according to the target fineness).

[0042] 2. Parameter setting (1) Revolution speed: set according to the hardness of the material (such as 400rpm for metal powder and 600rpm for ceramic powder).

[0043] (2) The ratio of rotation to revolution is fixed at 2:3 (rotation is counterclockwise, revolution is clockwise).

[0044] (3) Grinding target weight: The single grinding amount (e.g. 500g per can) is set by a ring weighing sensor.

[0045] 2. Automatic feeding process 1. Loading of feed box 15 (1) Pour the dried material (such as basalt, steel slag, coal gangue, etc.) into the funnel-shaped feed box 15, and the material in the box naturally falls to the bottom opening by gravity.

[0046] 2. The first discharge gate 12 is opened (1) The control system 5 sends a discharge command, and the first discharge gate 12 opens downward along the vertical center axis to release a fixed amount of material into the quartered screening conduit 14.

[0047] (2) The opening and closing time of the first discharge gate 12 is dynamically adjusted according to the material density (e.g., extended by 0.5 seconds for light materials).

[0048] 3. Quarter screening material distribution (1) The material is evenly divided into four paths through the quartering screening conduit 14, and the error of each path is ≤2% (distribution is optimized through the guide groove on the inner wall of the conduit).

[0049] (2) The second discharge gate 16 is opened synchronously to guide the four-way materials into the four material distribution sub-pipes of the ball mill capping system 17.

[0050] 4. Capping system 17 sealing (1) The retractable silo 13 is extended to press the inverted funnel-shaped sealing system 17 onto the top of the ball mill 31 to ensure airtightness.

[0051] (2) The fourth discharge gate 327 opens downward along the vertical center axis to release the material to the ball milling layer of the ball mill 31. The opening and closing time of the fourth discharge gate 327 is 15 seconds.

[0052] (3) After the fourth discharge gate 327 is closed, the retractable silo 13 contracts, and the inverted funnel-shaped capping system 17 is lifted from the top of the ball mill 31 .

[0053] (4) At the same time, a command is sent to the control system 5 to repeat the above feeding process, and the motor of the ball mill system 3 and the cooling system 37 are started to work. 3. Ball Milling Process 1. Start the ball milling system 3 (1) The motor drives the central turntable 34 to revolve counterclockwise, while the rotating turntable 32 rotates clockwise, with a speed ratio of 2:3.

[0054] (2) Cooling system 37 is started: the water-cooled interlayer (flow rate 10 L / min) and the air-cooled fan are operated synchronously, and the temperature is controlled to be ≤50°C.

[0055] 2. Impact and grinding (1) The ball mill 324 forms a dynamic collision-shear network under the action of centrifugal force: Large ball mill 324: high-speed impact crushes large particles; small ball mill 324: rolling friction refines to the target particle size.

[0056] (2) The ball milling layer screen 323 separates qualified (meets the specified particle size) powder in real time: the adsorption machine 328 is started, and the fan generates negative pressure to suck the fine powder into the screen 323.

[0057] 3. Storage and weighing (1) Fine powder is gathered 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 help of centrifugal force.

[0058] (2) The annular weighing sensor 3210 of the control layer monitors the weight of the powder at the gate in real time. When the preset value is reached, a signal is sent to the control system 5 to stop the ball milling and open the gate to discharge the material.

[0059] (3) At the same time, the automatic feeding system 1 starts working to realize automatic feeding. After the control system 5 receives the discharge completion signal, it triggers the automatic feeding system 1 to load the next batch of materials, and no manual intervention is required throughout the process.

[0060] 4. Automatic discharging process 1. Powder discharge (1) The electric discharge gate opens, and the fine powder enters the discharge system through the hollow part (diameter 60mm) of the rotating turntable 32.

[0061] (2) The discharge gate is opened synchronously, and the powder falls into the discharge box 42 (sealed design, dust prevention efficiency ≥ 99%).

[0062] 2. Vibration collection (1) The vibration motor 45 is started and transmits 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 crawler 41.

[0063] (2) The conveyor belt 41 conveys the powder to the second discharge port 46 (inverted quadrangular prism shape, side length 100 mm) at a speed of 0.2 m / s.

[0064] 5. Shutdown and Maintenance 1. Cooling and cleaning (1) After grinding is completed, the cooling system 37 continues to operate for 10 minutes until the equipment temperature drops below 30°C.

[0065] (2) The ball mill 31 is disassembled and the tungsten carbide tank body 321 and the screen 323 are cleaned using an ultrasonic cleaner (frequency 40 kHz).

[0066] 2. Wear inspection (1) Regularly (every 100 hours) check the diameter of the ball milling beads 324 (the wear rate of the stainless ball milling beads 324 is ≤0.1mm / 100h, and that of the agate beads is ≤0.05mm / 100h).

[0067] (2) Replace the deformed screen 323 (the service life of stainless steel is about 2000 hours).

[0068] The above-mentioned automated ball mill has achieved comprehensive improvements in efficiency, precision, and cleanliness through the four core technologies of intelligent material distribution, closed-loop control, negative pressure adsorption, and dynamic parameter adjustment, with significant 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 preparation technology.

[0069] This embodiment can achieve multiple technical effects through the above structure, which are as follows: Improve grinding efficiency Quarter-screen material duct 14-way distribution technology: The material is evenly distributed to four balls through four material distribution sub-tubes (error ≤ 2%) Grinding jar 31 reduces the quality difference within batches, avoids the ±10% error of manual material distribution, and shortens the single grinding time by 20%~30%.

[0070] Dynamic parameter adjustment: The control system 5 automatically optimizes the rotation speed according to the material hardness (such as 400rpm for metal powder and 600rpm for ceramic powder) and the real-time temperature (controlled ≤50℃) to avoid over-grinding or under-grinding, and improves the grinding efficiency by 35%.

[0071] Closed-loop negative pressure adsorption: The screen 323 and the adsorber 328 collect qualified fine powder (such as D90 particle size fluctuation <5%) in real time, reducing repeated grinding and reducing energy consumption by 15%~20%.

[0072] (2) Breakthrough in accuracy and consistency The ratio of ball mill beads 324 is optimized (10mm:5mm:2mm=1:2:4): large ball mill beads 324 impact and crush large particles, small ball mill beads 324 refine to nanometer level (such as 1μm), combined with tungsten carbide screen 323 (adjustable aperture), the standard deviation of particle size distribution is compressed from ±15% of traditional equipment to ±5%.

[0073] Ring weighing sensor closed-loop control: real-time monitoring of the weight of the powder storage layer, automatic shutdown and discharging of materials when the preset value (such as 500g) is reached, and the output error between batches is ≤1%, far exceeding the ±10% of manual control.

[0074] (3) Pollution control and safety Fully enclosed system: from feeding (funnel sealing) to discharging (dust prevention efficiency ≥ 99%), dust leakage rate < 0.1ppm, meeting GMP cleanliness standards.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automated ball mill, characterized in that: include: The automatic feeding system includes a feeding box, a material distribution telescopic structure, and a capping system connected in sequence from top to bottom. The material distribution telescopic structure includes a first discharge gate, a telescopic silo, a screening material conduit, and a second discharge gate arranged from top to bottom. The telescopic structure drives the capping to move up and down to achieve sealing of the ball mill system. A ball mill system, comprising a driving system and a central turntable driven by the driving system, a self-rotating turntable, and a ball milling tank, wherein a plurality of self-rotating turntables are arranged on the central turntable, a ball milling tank is installed on each self-rotating turntable, and the plurality of ball milling tanks are arranged below the material distribution telescopic structure, the ball milling tank comprises a tank body, a fourth discharge gate is arranged on the top of the tank body, the upper part of the tank body is a ball milling chamber, the lower part is a storage bin, a plurality of ball milling beads of different particle sizes are arranged inside the ball milling chamber, an annular screen is arranged in the center of the ball milling chamber, an adsorption machine is arranged inside the annular screen, the storage bin is located below the annular screen, and a weighing sensor and a third discharge gate are installed at the bottom of the storage bin; An automatic discharging system is arranged at the bottom of the storage bin; Control system, controls automatic feeding system, ball milling system and automatic discharging system.

2. The automated ball mill according to claim 1, characterized in that The automatic discharging system comprises a discharging box, two obliquely arranged vibration baffles are arranged inside the discharging box, a conveying crawler is arranged at the bottom of the two vibration baffles, and a discharging port is arranged on one side of the conveying crawler.

3. The automated ball mill according to claim 2, characterized in that: Two obliquely arranged vibration baffles are arranged opposite to each other, and the conveying crawler is located between the vibration baffles and at the bottom of the discharge box.

4. The automated ball mill according to claim 2, characterized in that: The bottom of the vibration baffle is a vibration rod, and the vibration rod is driven by a vibration motor.

5. The automated ball mill according to claim 1, characterized in that: The ball milling system also includes a cooling system.

6. The automated ball mill according to claim 5, characterized in that The cooling system is located at the discharge port of the ball milling system.

7. The automated ball mill according to claim 1, characterized in that: The plurality of self-rotating turntables are evenly arranged along the circumferential direction of the central turntable.

8. The automated ball mill according to claim 1, wherein: The capping system is conical, and the feed box is inverted conical.

9. The automated ball mill according to claim 1, characterized in that: A material distribution sub-tube is arranged inside the capping system, and the material distribution sub-tube connects the screening material conduit and the ball mill tank.

10. The control method of the automated ball mill according to any one of claims 1 to 9, characterized in that: as follows: Pour the material into the feed box, open the first discharge gate, release the quantitative material into the screening conduit, and at the same time open the second discharge gate to guide the material into the conveying pipe of the ball mill capping system; The retractable silo extends to press the capping system to the top of the ball mill to ensure air tightness; The fourth discharge gate is opened to release the material into the ball milling chamber of the ball mill; After the fourth discharge gate is closed, the retractable silo shrinks and lifts the capping system from the top of the ball mill. At the same time, a command is sent to the control system to repeat the above feeding process, and the central turntable, self-rotating turntable and cooling system of the ball mill system are started to work. The ball mill beads form dynamic collision and shear annular screens under the action of centrifugal force. The annular screen separates qualified powder in real time: the adsorption machine generates negative pressure, sucks the fine powder into the annular screen, and then gathers to the center of the third discharge gate through the storage layer, and is evenly distributed with the help of centrifugal force; The weighing sensor of the control system monitors the weight of the powder in real time. When the preset value is reached, a signal is sent to the control system to stop the ball milling and open the third discharge gate to discharge the material. The fine powder enters the automatic discharging system. At the same time, the automatic feeding system starts working to realize automatic feeding. After the control system receives the discharge completion signal, it triggers the automatic feeding system to load the next batch of materials.

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