A ball mill and method for preparing ultrafine powder

Abstract

The present invention discloses a ball mill for preparing ultrafine powder and a method thereof, which belongs to the technical field of ball mills, and comprises a main body module, a circulation module and a screening module, wherein the main body module comprises a bottom plate, the top of the bottom plate is fixedly connected to two support frames, a ball mill main body is arranged between the two support frames, the circulation module comprises a discharge box fixedly connected to the top of the bottom plate, the top of the discharge box is fixedly connected to a screening box, two elastic components are arranged on both sides of the screening box, the screening module is movably connected to the inside of the screening box, and through the arrangement of the screen plate, the screen hole component, the worm and the switching component, when the ball mill is in use, the coarseness of the discharged ultrafine powder can be quickly switched and adjusted as needed without changing the screen, thereby simplifying the operation steps, facilitating the use by the staff, and avoiding overly complicated steps affecting the normal use of the machine.

Description

Technical Field

[0001] The present invention relates to the technical field of ball mills, and more particularly to a ball mill for preparing ultrafine powder and a method thereof. Background Art

[0002] The ball mill is a key equipment for crushing materials after they are broken. This type of grinding mill is a mill that is loaded with a certain number of steel balls as grinding media. It is widely used in cement, silicate products, new building materials, refractory materials, fertilizers, black and non-ferrous metal beneficiation, glass and ceramics and other production industries to grind various ores and other grindable materials dry or wet. The ball mill is suitable for grinding various ores and other materials. It is widely used in mineral processing, building materials and chemical industries. It can be divided into two types of grinding methods: dry and wet. According to different discharge methods, it can be divided into two types: grid type and overflow type. With the development of the times, ball mills are also widely used in the mining field.

[0003] According to the search, the patent number CN218167227U discloses a ball mill that is easy to discharge, including a ball mill body, a feed pipe is arranged on the ball mill body, a discharge pipe is arranged on the side away from the feed pipe, a filter plate is arranged directly below the discharge pipe, and the end of the filter plate close to the discharge pipe is higher than the end away from the discharge pipe, which has the effect of improving the qualified rate of the material discharged from the ball mill.

[0004] With regard to the above-mentioned related technologies, when the above-mentioned ball mill is in use, ultrafine powder can be screened out through a filter plate to distinguish materials, and unqualified materials can be further ball-milled to ensure the particle size of the material, thereby facilitating the discharge of ultrafine powder. However, since the current filter plate has a simple structure, usually a screen structure, it can only screen out powder of one specification during use. When it is necessary to screen fine powders of other specifications, the staff needs to disassemble and install and replace the filter plate again. The disassembly and replacement operation is relatively cumbersome and takes a lot of time. Frequent switching is likely to affect the normal use of the machine, which is not conducive to the staff's use of the machine. For this reason, a ball mill and a method for preparing ultrafine powder are proposed. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a ball mill and a method for preparing ultrafine powder, which adopts the following technical solutions:

[0006] A ball mill for preparing ultrafine powder, comprising a main body module, a circulation module and a screening module, the main body module comprising a bottom plate, the top of the bottom plate is fixedly connected to two support frames, a ball mill body is arranged between the two support frames, the circulation module comprises a discharge box fixedly connected to the top of the bottom plate, the top of the discharge box is fixedly connected to a screening box, two elastic components are arranged on both sides of the screening box, the screening module is movably connected to the inside of the screening box, four elastic components are connected to the screening module, the top of the discharge box is fixedly connected to a lifting cylinder, the lifting cylinder is fixedly connected to the screening box, a feed port is provided on the outer surface of the lifting cylinder, a connecting plate is fixedly connected between the feed port and the inner wall of the screening box, a lifting component is arranged inside the lifting cylinder, and the inner wall of the screening box on both sides is connected to the lifting cylinder. A vibration component is arranged between the two sides of the inner wall of the discharge box, and the lifting component and the vibration component are both connected to the conveying component. An adjustment door is arranged on one side of the screening box, and one end of the ball mill body is connected to the top of the screening box. The screening module includes a sieve plate fixedly connected between four elastic components, and the sieve plate is arranged at an angle, and the bottom of the sieve plate is in contact with the vibration component. One end of the sieve plate is fixedly connected with a hollow box, and a plurality of sieve hole components are arranged in a straight line at equal distances inside the sieve plate. A worm is rotatably connected between the two sides of the inner wall of the hollow box, and the plurality of sieve hole components are all connected to the worm. Two switching components are arranged between the bottom of the hollow box and the outer surface of the worm, and the transmission directions of the two switching components are opposite.

[0007] Furthermore, the sieve hole assembly includes a rolling groove opened at the bottom of the sieve plate, the rolling groove extends to the top of the sieve plate, the inner part of the rolling groove is rotatably connected with a semi-circular arc plate, the outer surface of the semi-circular arc plate is provided with a plurality of flat grooves, the outer surfaces of the plurality of flat grooves are each provided with a group of sieve holes, and the aperture of each group of sieve holes is different.

[0008] Furthermore, the sieve hole assembly also includes a transmission rod fixedly connected to one end of the semicircular arc plate, one end of the transmission rod extends to the interior of the hollow box, and the outer surface of the transmission rod is fixedly connected to a worm gear, which is meshed with the worm.

[0009] Furthermore, the switching assembly includes a switching wheel fixedly connected to the outer surface of the worm, the outer surface of the switching wheel is rotatably connected to a gear ring, the inner wall of the gear ring is provided with a ratchet groove, the outer surface of the switching wheel is provided with a mounting groove, the interior of the mounting groove is movably connected with a ratchet, the top of the ratchet is movably connected to the inner wall of the ratchet groove, and a second spring is fixedly connected between the bottom of the ratchet and the inner wall of the mounting groove.

[0010] Furthermore, the switching assembly also includes a movable rack movably connected to the bottom of the hollow box, the movable rack is adapted to the outer surface of the gear ring, and a third spring is fixedly connected between the bottom end of the movable rack and the bottom of the hollow box, and the third spring is located outside the movable rack.

[0011] Furthermore, the elastic component includes a vibration groove opened on one side of the hollow box, a lifting block is movably connected inside the vibration groove, a connecting rod is fixedly connected between the lifting block and the top of the screen plate, and a first spring is fixedly connected between the bottom of the lifting block and the bottom of the inner wall of the vibration groove.

[0012] Furthermore, the vibration assembly includes a rotating rod rotatably connected between two sides of the screening box, two cam blocks are fixedly connected to the outer surface of the rotating rod, the outer surfaces of the two cam blocks are in contact with the bottom of the screen plate, one side of the screening box is fixedly connected to a driving motor, the output shaft of the driving motor is fixedly connected to one end of the rotating rod, and the other end of the rotating rod extends to the outside of the screening box.

[0013] Furthermore, the lifting assembly includes a lifting rod rotatably connected to the bottom of the inner wall of the lifting cylinder, the bottom end of the lifting rod extends to the interior of the discharge box, the top of the lifting cylinder is fixedly connected with a guide plate, one end of the guide plate is located above the other end of the ball mill body, one side of the discharge box is rotatably connected with a rotating shaft, and a bevel gear is fixedly connected between one end of the rotating shaft and the bottom end of the lifting rod, and the outer surfaces of the two bevel gears are meshed with each other.

[0014] Furthermore, the conveying assembly includes two conveying rollers that are rotatably connected between the two sides of the inner wall of the discharge box, a conveyor belt is transmission-connected between the outer surfaces of the two conveying rollers, one end of one of the conveying rollers extends to the outside of the discharge box, the outer surface of one of the conveying rollers and the other end of the rotating rod are fixedly connected to a first transmission roller, the outer surfaces of the two first transmission rollers are transmission-connected with a first transmission belt, the outer surface of the rotating shaft and the outer surface of one of the conveying rollers are fixedly connected to a second transmission roller, and the outer surfaces of the two second transmission rollers are transmission-connected with a second transmission belt.

[0015] A method for preparing ultrafine powder comprises the following steps:

[0016] S1. Adjustment steps: open the adjustment door, then press one of the movable racks and drive the third spring to contract. The movable rack will mesh with the gear ring and drive the gear ring. The gear ring pushes the ratchet through the ratchet groove. The ratchet will drive the switching wheel to rotate. The switching wheel drives the worm to rotate. When the worm rotates, it will drive multiple worm gears. The worm gear will drive the semicircular arc plate to rotate to one side through the transmission rod, so that multiple groups of screening holes are switched. When the movable rack is released, the third spring will drive the movable rack to reset, and at this time the gear ring will idle on the outer surface of the switching wheel, and the ratchet groove will press the ratchet to contract. Since the transmission directions of the two switching components are opposite, pressing another movable rack will drive multiple screen hole components to rotate to the other side, so that the size of the screened material can be quickly switched as needed;

[0017] S2, discharging step: open the ball mill body and the driving motor, the ball mill body will grind the raw materials, the ground materials will enter the inside of the screening box and be located above the screen plate, and the driving motor will drive the rotating rod and the cam block to rotate, the cam block will reciprocate to push the screen plate, the screen plate drives the four lifting blocks to reciprocate, and the first spring assists the screen plate to vibrate, the material above it passes through the screening hole for screening, when the rotating rod rotates, it will drive one of the conveying rollers through the first transmission belt, the conveying roller drives the conveying belt to roll, so as to convey the screened ultrafine powder to the outside of the discharging box;

[0018] S3, material return step: Since the screen plate is set at an angle, the material that has not passed the screening will fall onto the connecting plate following the inclination angle of the screen plate. The connecting plate will guide the material into the lifting cylinder. When one of the conveying rollers rotates, it will drive the rotating shaft through the second transmission belt. Through the engagement of the two bevel gears, the lifting rod will rotate, and the lifting rod will lift the material inside the lifting cylinder, and then it will be guided into the main body of the ball mill through the guide plate.

[0019] In summary, the present invention includes the following beneficial technical effects:

[0020] (1) The present invention arranges the sieve plate, the sieve hole assembly, the worm and the switching assembly so that when the ball mill is in use, the coarseness of the discharged ultrafine powder can be quickly switched and adjusted as needed without replacing the sieve, thereby simplifying the operation steps, facilitating the use of the staff, and avoiding overly complicated steps that affect the normal use of the machine;

[0021] (2) The present invention arranges a vibration component, an elastic component and a conveying component, so that the device can screen the materials and send the materials that have not passed the screening back to the main body of the ball mill for processing, thereby performing automatic cycle processing without the need for staff to transfer, reducing the burden on the staff and making the ball mill more automated;

[0022] (3) The present invention arranges a driving motor, a first transmission belt and a second transmission belt so that a single driving motor can drive the lifting component, the conveying component and the screening module to work without requiring excessive driving settings, thereby minimizing the cost of the machine and facilitating popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the circulation module of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the lifting assembly, the vibration assembly and the conveying assembly of the present invention;

[0027] Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0028] Figure 6 This is a schematic diagram of the explosion structure of the screening module of the present invention;

[0029] Figure 7 For the present invention Figure 6 Schematic diagram of the structure viewed from above;

[0030] Figure 8 It is a structural schematic diagram of the sieve hole assembly of the present invention;

[0031] Fig. 9 It is a cross-sectional structural schematic diagram of the switching assembly of the present invention;

[0032] Fig.10 For the present invention Fig. 9 Enlarged structural diagram at B in the middle.

[0033] Description of the numbers in the figure:

[0034] 100, main body module; 110, bottom plate; 120, support frame; 130, ball mill body;

[0035] 200, circulation module; 210, discharge box; 220, screening box; 230, lifting cylinder; 240, elastic component; 241, lifting block; 242, connecting rod; 243, first spring; 250, vibration component; 251, rotating rod; 252, driving motor; 253, cam block; 260, lifting component; 261, lifting rod; 262, guide plate; 263, rotating shaft; 264, bevel gear; 270, conveying component; 271, conveying roller; 272, conveying belt; 273, first transmission roller; 274, first transmission belt; 275, second transmission roller; 276, second transmission belt; 280, connecting plate; 290, adjustment door;

[0036] 300, screening module; 310, sieve plate; 320, hollow box; 330, sieve hole assembly; 331, rolling groove; 332, semicircular arc plate; 333, flat groove; 334, screening hole; 335, transmission rod; 336, worm gear; 340, worm; 350, switching assembly; 351, switching wheel; 352, gear ring; 353, ratchet; 354, second spring; 355, movable rack; 356, third spring. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The following is combined with Figure 1-10 The present invention is described in further detail.

[0041] See also Figure 1-10 A ball mill for preparing ultrafine powders, comprising a main module 100, a circulation module 200 and a screening module 300, wherein the main module 100 comprises a bottom plate 110, two support frames 120 are fixedly connected to the top of the bottom plate 110, a ball mill body 130 is arranged between the two support frames 120, the circulation module 200 comprises a discharge box 210 fixedly connected to the top of the bottom plate 110, a screening box 220 is fixedly connected to the top of the discharge box 210, and two The elastic component 240 and the screening module 300 are movably connected to the inside of the screening box 220. The four elastic components 240 are all connected to the screening module 300. The top of the discharge box 210 is fixedly connected with a lifting cylinder 230. The lifting cylinder 230 is fixedly connected to the screening box 220. The outer surface of the lifting cylinder 230 is provided with a feed port. A connecting plate 280 is fixedly connected between the feed port and the inner wall of the screening box 220. The lifting cylinder 230 is provided with a lifting component 260. The inner wall of the screening box 220 is provided on both sides. A vibration assembly 250 is arranged between the two sides of the inner wall of the discharge box 210, and the vibration assembly 250 is in contact with the bottom of the screening module 300. A conveying assembly 270 is arranged between the two sides of the inner wall of the discharge box 210. The lifting assembly 260 and the vibration assembly 250 are both connected to the conveying assembly 270. An adjustment door 290 is arranged on one side of the screening box 220. One end of the ball mill body 130 is connected to the top of the screening box 220. The screening module 300 includes a sieve plate 310 fixedly connected between the four elastic assemblies 240. The sieve plate 310 It is arranged at an inclination, and the bottom of the sieve plate 310 contacts the vibration assembly 250. One end of the sieve plate 310 is fixedly connected to the hollow box 320. The interior of the sieve plate 310 is provided with a plurality of sieve hole assemblies 330 in a straight line and at equal distances. A worm 340 is rotatably connected between the two sides of the inner wall of the hollow box 320. The plurality of sieve hole assemblies 330 are all connected to the worm 340. Two switching assemblies 350 are arranged between the bottom of the hollow box 320 and the outer surface of the worm 340, and the transmission directions of the two switching assemblies 350 are opposite.

[0042] During use, the staff can first open the adjustment door 290, and then press one of the switching components 350, one of the switching components 350 will drive the worm 340, and the worm 340 will drive the multiple sieve hole components 330 to rotate to one side when rotating, and the rotation of the multiple sieve hole components 330 will switch the sieve holes. Since the transmission directions of the two switching components 350 are opposite, pressing the other switching component 350 will drive the multiple sieve hole components 330 to rotate to the other side. After the adjustment is completed, the staff closes the adjustment door 290, and then opens the ball mill body 130 and the vibration component 250. The ball mill body 130 will grind the raw material, and the ground material will enter the interior of the screening box 220 and be located above the screen plate 310, and the vibration component The opening of 250 will reciprocate and lift the sieve plate 310, and the sieve plate 310 will vibrate through four elastic components 240. The material above it will be screened through multiple sieve hole components 330. When the vibration component 250 is working, it will drive the conveying component 270, and the conveying component 270 will convey the screened ultrafine powder to the outside of the discharge box 210. Since the sieve plate 310 is set at an angle, the material that does not pass the screening will fall onto the connecting plate 280 following the inclination angle of the sieve plate 310, and the connecting plate 280 will guide the material into the lifting cylinder 230. When the conveying component 270 is working, it will drive the lifting component 260, and the lifting component 260 will lift the material inside the lifting cylinder 230 back to the inside of the ball mill body 130 for ball milling, and then perform discharge and screening operations again.

[0043] The sieve hole assembly 330 includes a rolling groove 331 opened at the bottom of the sieve plate 310, and the rolling groove 331 extends to the top of the sieve plate 310. The rolling groove 331 is rotatably connected to a semi-circular plate 332 inside. The outer surface of the semi-circular plate 332 is provided with a plurality of flat grooves 333. The outer surfaces of the plurality of flat grooves 333 are provided with a group of sieving holes 334. The apertures of each group of sieving holes 334 are different. The sieve hole assembly 330 also includes a transmission rod 335 fixedly connected to one end of the semi-circular plate 332. One end of the transmission rod 335 extends to the inside of the hollow box 320. The outer surface of the transmission rod 335 is fixedly connected to a worm gear 336. The worm gear 336 meshes with the worm 340. The switching assembly 350 includes a transmission rod 335 fixedly connected to the outer surface of the worm 340. The switching wheel 351 has a switching wheel 351 on the surface, and the outer surface of the switching wheel 351 is rotatably connected to the gear ring 352, the inner wall of the gear ring 352 is provided with a ratchet groove, the outer surface of the switching wheel 351 is provided with a mounting groove, and the inside of the mounting groove is movably connected with a ratchet 353, the top of the ratchet 353 is movably connected to the inner wall of the ratchet groove, and a second spring 354 is fixedly connected between the bottom of the ratchet 353 and the inner wall of the mounting groove. The switching assembly 350 also includes a movable rack 355 movably connected to the bottom of the hollow box 320, the movable rack 355 is adapted to the outer surface of the gear ring 352, and a third spring 356 is fixedly connected between the bottom end of the movable rack 355 and the bottom of the hollow box 320, and the third spring 356 is located outside the movable rack 355.

[0044] Open the adjustment door 290, then press one of the movable racks 355 and drive the third spring 356 to contract, the movable rack 355 will mesh with the gear ring 352 and drive the gear ring 352, the gear ring 352 pushes the ratchet 353 through the ratchet groove, the ratchet 353 will drive the switching wheel 351 to rotate, the switching wheel 351 drives the worm 340 to rotate, the worm 340 will drive multiple worm wheels 336 when rotating, the worm wheel 336 will drive the semicircular arc plate 332 to rotate to one side through the transmission rod 335 When the movable rack 355 is released, the third spring 356 will drive the movable rack 355 to reset, and at this time, the gear ring 352 will idle on the outer surface of the switching wheel 351, and the ratchet groove will press the ratchet 353 to contract. Since the two switching components 350 have opposite transmission directions, pressing another movable rack 355 will drive the multiple sieve hole components 330 to rotate to the other side, so that the size of the screened material can be quickly switched as needed.

[0045] The elastic component 240 includes a vibration groove opened on one side of the hollow box 320, and a lifting block 241 is movably connected inside the vibration groove. A connecting rod 242 is fixedly connected between the lifting block 241 and the top of the screen plate 310, and a first spring 243 is fixedly connected between the bottom of the lifting block 241 and the bottom of the inner wall of the vibration groove. The vibration component 250 includes a rotating rod 251 rotatably connected between the two sides of the screening box 220, and two cam blocks 253 are fixedly connected to the outer surface of the rotating rod 251, and the outer surfaces of the two cam blocks 253 are in contact with the bottom of the screen plate 310. A driving motor 252 is fixedly connected to one side of the screening box 220, and the output shaft of the driving motor 252 is fixedly connected to one end of the rotating rod 251, and the other end of the rotating rod 251 extends to the outside of the screening box 220.

[0046] The driving motor 252 will drive the rotating rod 251 and the cam block 253 to rotate, and the cam block 253 will push the screen plate 310 back and forth. The screen plate 310 drives the four lifting blocks 241 to lift and reciprocate, and the first spring 243 assists the screen plate 310 to vibrate, and the material above it is screened through the screening holes 334.

[0047] The lifting assembly 260 includes a lifting rod 261 rotatably connected to the bottom of the inner wall of the lifting cylinder 230, the bottom end of the lifting rod 261 extends to the inside of the discharge box 210, the top of the lifting cylinder 230 is fixedly connected with a guide plate 262, one end of the guide plate 262 is located above the other end of the ball mill body 130, one side of the discharge box 210 is rotatably connected with a rotating shaft 263, one end of the rotating shaft 263 and the bottom end of the lifting rod 261 are fixedly connected with a bevel gear 264, the outer surfaces of the two bevel gears 264 are meshed with each other, and the conveying assembly 270 includes two bevel gears 264 that are rotatably connected to the inner wall of the discharge box 210 on both sides. There are conveyor rollers 271 between them, and a conveyor belt 272 is connected to the outer surfaces of the two conveyor rollers 271, one end of one of the conveyor rollers 271 extends to the outside of the discharge box 210, the outer surface of one of the conveyor rollers 271 and the other end of the rotating rod 251 are fixedly connected to the first transmission roller 273, and the outer surfaces of the two first transmission rollers 273 are connected to the first transmission belt 274, the outer surface of the rotating shaft 263 and the outer surface of one of the conveyor rollers 271 are fixedly connected to the second transmission roller 275, and the outer surfaces of the two second transmission rollers 275 are connected to the second transmission belt 276.

[0048] When the rotating rod 251 rotates, one of the conveying rollers 271 will be driven through the first transmission belt 274, and the conveying roller 271 will drive the conveying belt 272 to roll, so as to transport the screened ultrafine powder to the outside of the discharge box 210. Since the screen plate 310 is inclined, the material that has not passed the screening will fall onto the connecting plate 280 following the inclination angle of the screen plate 310, and the connecting plate 280 will guide the material into the lifting cylinder 230. When one of the conveying rollers 271 rotates, it will drive the rotating shaft 263 through the second transmission belt 276. Through the engagement of the two bevel gears 264, the lifting rod 261 rotates, and the lifting rod 261 will lift the material inside the lifting cylinder 230, and then guide it into the ball mill body 130 through the guide plate 262 for ball milling, and then perform discharge and screening operations again.

[0049] A method for preparing ultrafine powder comprises the following steps:

[0050] S1. Adjustment steps: open the adjustment door 290, then press one of the movable racks 355 and drive the third spring 356 to contract, the movable rack 355 will mesh with the gear ring 352 and drive the gear ring 352, the gear ring 352 pushes the ratchet 353 through the ratchet groove, the ratchet 353 will drive the switching wheel 351 to rotate, the switching wheel 351 drives the worm 340 to rotate, the worm 340 will drive multiple worm wheels 336 when rotating, the worm wheel 336 will drive the semicircular arc plate 332 through the transmission rod 335 Rotate to one side to switch the multiple groups of screening holes 334. When the movable rack 355 is released, the third spring 356 will drive the movable rack 355 to reset. At this time, the gear ring 352 will idle on the outer surface of the switching wheel 351, and the ratchet groove will press the ratchet 353 to contract. Since the two switching components 350 have opposite transmission directions, pressing another movable rack 355 will drive the multiple screening hole components 330 to rotate to the other side, so that the size of the screening material can be quickly switched according to the needs.

[0051] S2, discharging step: open the ball mill body 130 and the driving motor 252, the ball mill body 130 will grind the raw material, the ground material will enter the inside of the screening box 220 and be located above the screen plate 310, and the driving motor 252 will drive the rotating rod 251 and the cam block 253 to rotate, the cam block 253 will reciprocate to push the screen plate 310, the screen plate 310 drives the four lifting blocks 241 to reciprocate, and the first spring 243 assists the screen plate 310 to vibrate, and the material above it passes through the screening hole 334 for screening, when the rotating rod 251 rotates, it will drive one of the conveying rollers 271 through the first transmission belt 274, the conveying roller 271 drives the conveying belt 272 to roll, so as to convey the screened ultrafine powder to the outside of the discharging box 210;

[0052] S3, material return step: Since the screen plate 310 is set at an angle, the material that has not passed the screening will fall onto the connecting plate 280 following the inclination angle of the screen plate 310, and the connecting plate 280 will guide the material into the interior of the lifting cylinder 230. When one of the conveying rollers 271 rotates, it will drive the rotating shaft 263 through the second transmission belt 276. Through the engagement of the two bevel gears 264, the lifting rod 261 will rotate, and the lifting rod 261 will lift the material inside the lifting cylinder 230, and then guide it into the interior of the ball mill body 130 through the guide plate 262.

[0053] The implementation principle of the embodiment of the present invention is as follows: during use, the staff can first open the adjustment door 290, and then press one of the movable racks 355 to drive the third spring 356 to contract, the movable rack 355 will mesh with the gear ring 352 and drive the gear ring 352, the gear ring 352 pushes the ratchet 353 through the ratchet groove, the ratchet 353 will drive the switching wheel 351 to rotate, the switching wheel 351 drives the worm 340 to rotate, the worm 340 will drive multiple worm wheels 336 when rotating, the worm wheel 336 will drive the semicircular arc plate 332 to rotate to one side through the transmission rod 335, so that the multiple groups of screening holes 334 When the movable rack 355 is switched, the third spring 356 will drive the movable rack 355 to reset, and at this time the gear ring 352 will idle on the outer surface of the switching wheel 351, and the ratchet groove will press the ratchet 353 to shrink. Since the two switching components 350 have opposite transmission directions, pressing another movable rack 355 will drive the multiple sieve hole components 330 to rotate to the other side, so that the size of the screened material can be quickly switched as needed. After the adjustment is completed, the staff closes the adjustment door 290, and then opens the ball mill body 130 and the drive motor 252. The ball mill body 130 will adjust the original The material after grinding will enter the interior of the screening box 220 and be located above the screening plate 310, and the driving motor 252 will drive the rotating rod 251 and the cam block 253 to rotate, the cam block 253 will reciprocate and push the screening plate 310, the screening plate 310 drives the four lifting blocks 241 to reciprocate and lift, and the first spring 243 assists the screening plate 310 to vibrate, and the material above it passes through the screening hole 334 for screening, and when the rotating rod 251 rotates, it will drive one of the conveying rollers 271 through the first transmission belt 274, and the conveying roller 271 drives the conveying belt 272 to roll, so that the screened ultrafine powder is transported to the screening box 220. The materials are sent to the outside of the discharge box 210. Since the screen plate 310 is tilted, the materials that have not passed the screening will fall onto the connecting plate 280 following the tilt angle of the screen plate 310. The connecting plate 280 guides the materials into the interior of the lifting cylinder 230. When one of the conveying rollers 271 rotates, it will transmit the rotating shaft 263 through the second transmission belt 276. Through the engagement of the two bevel gears 264, the lifting rod 261 rotates. The lifting rod 261 will lift the materials in the lifting cylinder 230, and then guide them into the interior of the ball mill body 130 through the guide plate 262 for ball milling, and then the discharge and screening operations are performed again.

[0054] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ball mill for preparing ultrafine powder, comprising a main module (100), a circulation module (200) and a screening module (300), characterized in that: The main body module (100) comprises a bottom plate (110), the top of the bottom plate (110) is fixedly connected to two support frames (120), and a ball mill body (130) is arranged between the two support frames (120); The circulation module (200) comprises a discharge box (210) fixedly connected to the top of the bottom plate (110), a screening box (220) fixedly connected to the top of the discharge box (210), two elastic components (240) are arranged on both sides of the screening box (220), the screening module (300) is movably connected to the inside of the screening box (220), the four elastic components (240) are connected to the screening module (300), a lifting cylinder (230) is fixedly connected to the top of the discharge box (210), the lifting cylinder (230) is fixedly connected to the screening box (220), a feed port is provided on the outer surface of the lifting cylinder (230), and the feed port is connected to the screening box (220). A connecting plate (280) is fixedly connected between the inner walls of the box (220); a lifting assembly (260) is arranged inside the lifting cylinder (230); a vibration assembly (250) is arranged between the two sides of the inner wall of the screening box (220); the vibration assembly (250) is in contact with the bottom of the screening module (300); a conveying assembly (270) is arranged between the two sides of the inner wall of the discharge box (210); the lifting assembly (260) and the vibration assembly (250) are both connected to the conveying assembly (270); an adjustment door (290) is arranged on one side of the screening box (220); and one end of the ball mill body (130) is connected to the top of the screening box (220); The screening module (300) comprises a screen plate (310) fixedly connected between four elastic force components (240), the screen plate (310) being arranged in an inclined manner, the bottom of the screen plate (310) being in contact with the vibration component (250), one end of the screen plate (310) being fixedly connected to a hollow box (320), a plurality of screen hole components (330) being arranged in a straight line and at equal distances inside the screen plate (310), a worm (340) being rotatably connected between two sides of the inner wall of the hollow box (320), the plurality of screen hole components (330) being connected to the worm (340), two switching components (350) being arranged between the bottom of the hollow box (320) and the outer surface of the worm (340), the transmission directions of the two switching components (350) being opposite; The sieve hole assembly (330) comprises a rolling groove (331) formed at the bottom of the sieve plate (310), the rolling groove (331) extending to the top of the sieve plate (310), a semicircular plate (332) being rotatably connected inside the rolling groove (331), a plurality of flat grooves (333) being formed on the outer surface of the semicircular plate (332), a group of sieve holes (334) being formed on the outer surfaces of the plurality of flat grooves (333), and the apertures of each group of sieve holes (334) being different; The sieve hole assembly (330) further comprises a transmission rod (335) fixedly connected to one end of the semicircular arc plate (332), one end of the transmission rod (335) extending into the interior of the hollow box (320), a worm wheel (336) fixedly connected to the outer surface of the transmission rod (335), and the worm wheel (336) meshing with the worm (340); The switching assembly (350) comprises a switching wheel (351) fixedly connected to the outer surface of the worm (340); the outer surface of the switching wheel (351) is rotatably connected to a gear ring (352); the inner wall of the gear ring (352) is provided with a ratchet groove; the outer surface of the switching wheel (351) is provided with a mounting groove; a ratchet (353) is movably connected inside the mounting groove; the top of the ratchet (353) is movably connected to the inner wall of the ratchet groove; and a second spring (354) is fixedly connected between the bottom of the ratchet (353) and the inner wall of the mounting groove; The switching assembly (350) further comprises a movable rack (355) movably connected to the bottom of the hollow box (320), the movable rack (355) being adapted to the outer surface of the gear ring (352), a third spring (356) being fixedly connected between the bottom end of the movable rack (355) and the bottom of the hollow box (320), and the third spring (356) being located outside the movable rack (355).

2. A ball mill for preparing ultrafine powder according to claim 1, characterized in that: The elastic component (240) comprises a vibration groove opened on one side of the hollow box (320), a lifting block (241) is movably connected inside the vibration groove, a connecting rod (242) is fixedly connected between the lifting block (241) and the top of the sieve plate (310), and a first spring (243) is fixedly connected between the bottom of the lifting block (241) and the bottom of the inner wall of the vibration groove.

3. A ball mill for preparing ultrafine powder according to claim 2, characterized in that: The vibration assembly (250) comprises a rotating rod (251) rotatably connected between two sides of the screening box (220); two cam blocks (253) are fixedly connected to the outer surface of the rotating rod (251); the outer surfaces of the two cam blocks (253) are in contact with the bottom of the screening plate (310); a driving motor (252) is fixedly connected to one side of the screening box (220); the output shaft of the driving motor (252) is fixedly connected to one end of the rotating rod (251); and the other end of the rotating rod (251) extends to the outside of the screening box (220).

4. A ball mill for preparing ultrafine powder according to claim 3, characterized in that: The lifting assembly (260) includes a lifting rod (261) rotatably connected to the bottom of the inner wall of the lifting cylinder (230), the bottom end of the lifting rod (261) extends to the inside of the discharge box (210), the top of the lifting cylinder (230) is fixedly connected to a guide plate (262), one end of the guide plate (262) is located above the other end of the ball mill body (130), one side of the discharge box (210) is rotatably connected to a rotating shaft (263), and a bevel gear (264) is fixedly connected between one end of the rotating shaft (263) and the bottom end of the lifting rod (261), and the outer surfaces of the two bevel gears (264) are meshed with each other.

5. A ball mill for preparing ultrafine powder according to claim 4, characterized in that: The conveying assembly (270) comprises two conveying rollers (271) which are both rotatably connected between two sides of the inner wall of the discharge box (210); a conveying belt (272) is transmission-connected between the outer surfaces of the two conveying rollers (271); one end of one of the conveying rollers (271) extends to the outside of the discharge box (210); the outer surface of one of the conveying rollers (271) and the other end of the rotating rod (251) are both fixedly connected to a first transmission roller (273); the outer surfaces of the two first transmission rollers (273) are transmission-connected to a first transmission belt (274); the outer surface of the rotating shaft (263) and the outer surface of one of the conveying rollers (271) are both fixedly connected to a second transmission roller (275); and the outer surfaces of the two second transmission rollers (275) are transmission-connected to a second transmission belt (276).

6. A method for preparing ultrafine powder, according to the ball mill for preparing ultrafine powder according to claim 5, characterized in that: The following steps are involved: S1. Adjustment steps: open the adjustment door (290), then press one of the movable racks (355) and drive the third spring (356) to contract, the movable rack (355) will mesh with the gear ring (352) and drive the gear ring (352), the gear ring (352) pushes the ratchet (353) through the ratchet groove, the ratchet (353) will drive the switching wheel (351) to rotate, the switching wheel (351) drives the worm (340) to rotate, the worm (340) will drive multiple worm wheels (336) when rotating, the worm wheels (336) will drive the semicircular gears (336) through the transmission rod (335) The arc plate (332) rotates to one side, so that the multiple groups of screening holes (334) are switched. When the movable rack (355) is released, the third spring (356) will drive the movable rack (355) to reset, and at this time, the gear ring (352) will idle on the outer surface of the switching wheel (351), and the ratchet groove will press the ratchet (353) to shrink. Since the two switching components (350) have opposite transmission directions, pressing another movable rack (355) will drive the multiple screening hole components (330) to rotate to the other side, so that the size of the screened material can be quickly switched according to needs; S2, discharging step: the ball mill body (130) and the driving motor (252) are opened, the ball mill body (130) will grind the raw material, the ground material will enter the interior of the screening box (220) and be located above the screening plate (310), and the driving motor (252) will drive the rotating rod (251) and the cam block (253) to rotate, the cam block (253) will reciprocate and push the screening plate (310), the screening plate (310) drives the four lifting blocks (241) to reciprocate and lift, and the first spring (243) assists the screening plate (310) to vibrate, and the material above it passes through the screening hole (334) for screening, and when the rotating rod (251) rotates, it will drive one of the conveying rollers (271) through the first transmission belt (274), and the conveying roller (271) drives the conveying belt (272) to roll, so as to convey the screened ultrafine powder to the outside of the discharging box (210); S3, material return step: Since the sieve plate (310) is arranged at an angle, the material that has not passed the screening will fall onto the connecting plate (280) following the inclination angle of the sieve plate (310), and the connecting plate (280) will guide the material into the interior of the lifting cylinder (230). When one of the conveying rollers (271) rotates, it will drive the rotating shaft (263) through the second transmission belt (276), and through the meshing of the two bevel gears (264), the lifting rod (261) will rotate, and the lifting rod (261) will lift the material inside the lifting cylinder (230), and then guide it into the interior of the ball mill body (130) through the guide plate (262).

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