An alternate feeding structure for a planetary ball mill

Abstract

The application provides an alternating feeding structure suitable for a planetary ball mill, and relates to a planetary ball mill, which comprises a planetary ball mill structure with a ball mill tank, a discharging structure, a rotating lifting structure, a feeding structure and a cover structure, the feeding structure and the cover structure are arranged on the rotating lifting structure and are driven to rotate or lift by the rotating lifting structure, the feeding structure has the functions of distributing and feeding, the cover structure comprises a first cover plate and a second cover plate arranged below the first cover plate, the two cover plates can rotate relative to each other, a tank cover is rotatably arranged on the second cover plate, the feeding and the cover structure are driven to perform different actions by the rotating lifting structure, the feeding, the distributing and the feeding are automatically realized, the manual intervention is reduced, the automation degree is improved, the feeding structure and the cover structure only work under the driving of the rotating lifting structure, the complexity of the equipment is reduced, and the cost of the equipment is indirectly reduced.

Description

Technical Field

[0001] This invention relates to the field of planetary ball mills, and particularly to an alternating feeding structure suitable for planetary ball mills. Background Technology

[0002] Planetary ball mills are key equipment for further pulverizing materials after they have been crushed. They are widely used for fine processing of materials and for dry or wet grinding of various ores and other grindable materials.

[0003] Currently, research on planetary ball mills mainly focuses on improving grinding efficiency, with relatively little research on automated production, especially automated material feeding and dispensing. Existing planetary ball mills require manual opening of the grinding jar to add materials (such as powders) and grinding balls for grinding. This method is not only labor-intensive and inefficient, but also difficult to adapt to automated production processes.

[0004] Based on the aforementioned technical problems, this application provides an alternating feeding structure suitable for planetary ball mills, aiming to improve the automation level of planetary ball mills. Summary of the Invention

[0005] This invention provides an alternating feeding structure suitable for planetary ball mills, the purpose of which is to improve the automation level of the feeding process of planetary ball mills, reduce manual intervention, and improve production efficiency.

[0006] To achieve the above objectives, embodiments of the present invention provide an alternating feeding structure suitable for planetary ball mills, comprising:

[0007] Planetary ball mill structure, including several grinding jars;

[0008] Material feeding structure;

[0009] Rotary lifting structure;

[0010] The feeding structure and the sealing structure are mounted on the rotary lifting structure and rotate or lift under the drive of the rotary lifting structure. The feeding structure includes an intermediate hopper and a distribution hopper located on the side of the intermediate hopper and connected to the intermediate hopper. The top of the intermediate hopper is provided with a feeding port and the bottom of the distribution hopper is provided with a discharging port.

[0011] The sealing structure includes a first sealing plate and a second sealing plate arranged coaxially. The first sealing plate is positioned above the second sealing plate. The first sealing plate and the second sealing plate rotate relative to each other. The second sealing plate is provided with a number of jar lids that are the same as the number of ball mill jars. The jar lids are rotatably mounted on the second sealing plate.

[0012] The alternating feeding structure has three states. In the first state, the powder in the intermediate hopper is diverted to the distribution hopper, and the hopper cover is pressed onto the ball mill jar. In the second state, the feeding structure and the sealing structure rise, and the intermediate hopper receives the powder from the discharging structure. In the third state, the feeding structure rotates to the top of the ball mill jar and moves downward to feed the powder into the ball mill jar.

[0013] Preferably, the rotary lifting structure includes a first rotary mechanism and a first lifting mechanism, wherein the first lifting mechanism is disposed on the first rotary mechanism, and the feeding structure and the sealing structure are disposed on the first lifting mechanism.

[0014] Preferably, the first lifting mechanism is a lead screw assembly, the feeding structure and the sealing structure are disposed on the lead screw assembly, and the first rotating mechanism includes a hollow rotating platform, a chassis is fixed on the hollow rotating platform, and the lead screw assembly is disposed on the hollow rotating platform.

[0015] Preferably, the bottom of the intermediate silo is provided with a protrusion, and a vibration mechanism is provided below the protrusion. The vibration mechanism applies point vibration and surface vibration to the protrusion.

[0016] The vibration mechanism includes a first vibrator disposed below the protrusion and a force plate disposed above the first vibrator. The lower surface of the protrusion forms an upwardly recessed cavity. The force plate and the first vibrator are disposed in the cavity. The force plate is fixedly connected to the protrusion, and the first vibrator acts on the force plate.

[0017] Several marbles are arranged between the force-bearing plate and the cavity, and the marbles are in a free state.

[0018] Preferably, the intermediate silo has several intermediate discharge ports on its side, and each of the sub-silos is connected to the intermediate silo through the intermediate discharge ports. A first sealing mechanism is provided at the intermediate discharge port for closing the intermediate discharge port.

[0019] Preferably, the feeding structure further includes a second rotating mechanism and a second lifting mechanism. The second lifting mechanism is disposed on the second rotating mechanism and between each of the material distribution bins. The second lifting mechanism is provided with a plurality of bottom sealing plugs for closing the discharge port.

[0020] The second lifting mechanism is equipped with a first sensor assembly for determining the relative height between the discharge port and the bottom sealing plug;

[0021] The second rotating mechanism is equipped with a second sensor assembly for determining the relative angle between the discharge port and the sealing plug.

[0022] Preferably, a first rotating unit is provided at the center of the first cover plate and the second cover plate, and the first rotating unit is rotatably connected to the first cover plate and the second cover plate;

[0023] The second cover plate is provided with a second rotating unit that is the same number as the number of ball mill jars. The jar cover and the second cover plate are mounted on the second cover plate through the second rotating unit.

[0024] Both the first rotating unit and the second rotating unit are self-aligning ball bearings with cylindrical bores.

[0025] Preferably, a leveling mechanism is further provided between the first cover plate and the second cover plate. The leveling mechanism includes a sleeve provided in the first cover plate, a buffer column inserted in the sleeve, an elastic element provided on the buffer column, one end of the elastic element abutting against the buffer column, and the other end abutting against the first cover plate. A universal joint bearing abutting against the second cover plate is also provided at the bottom end of the buffer column.

[0026] Preferably, the center of the second cover plate is provided with a third sensor assembly for determining the positional relationship between the can cover and the grinding jar.

[0027] The above-described solution of the present invention has the following beneficial effects:

[0028] In this application, the feeding structure and the sealing structure are driven by a rotary lifting structure to perform different actions, thereby automating the material distribution and feeding process, reducing manual intervention, improving the degree of automation, and reducing the complexity of the equipment by having the feeding structure and sealing structure work only under the drive of the rotary lifting structure. This also indirectly reduces the cost of the equipment.

[0029] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0030] Figure 1 This is an overall schematic diagram of the present invention;

[0031] Figure 2 This is a schematic diagram of the rotary lifting structure, the sealing structure, and the feeding structure;

[0032] Figure 3 This is a schematic diagram of a rotating lifting structure;

[0033] Figure 4 This is a schematic diagram of the feeding structure;

[0034] Figure 5 This is a cross-sectional view of the intermediate silo;

[0035] Figure 6It is a cross-sectional view of several material distribution bins;

[0036] Figure 7 This is a schematic diagram of the cap structure;

[0037] Figure 8 This is a cross-sectional view of the cap structure.

[0038] [Explanation of Labels in the Attached Image]

[0039] 100 - Planetary ball mill structure, 110 - Milling jar

[0040] 200- Feeding structure,

[0041] 300-Rotary lifting structure, 310-First rotating mechanism, 320-First lifting mechanism, 321-Screw assembly, 400-Feeding structure, 410-Intermediate hopper, 411-Feed inlet, 412-Protrusion, 413-First vibrator, 415-Force plate, 414-Ball bearing.

[0042] 420 - Material distribution bin, 430 - First sealing mechanism

[0043] 440 - Second rotating mechanism, 450 - Second lifting mechanism

[0044] 500-Sealing structure, 510-First sealing plate, 520-Second sealing plate, 530-Can lid, 540-First rotating unit, 560-Leveling mechanism, 561-Sleeve, 562-Buffer column, 563-Elastic element, 564-Universal bearing, 321a-Wire lever, 321b-Guide rod, 321c-Chassis, 321d-Sliding unit, 321e-Gantry. Detailed Implementation

[0045] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0046] like Figure 1-8 As shown, an embodiment of the present invention provides an alternating feeding structure suitable for a planetary ball mill, including a planetary ball mill mechanism, a discharge structure 200, a rotary lifting structure 300, a feeding structure 400, and a sealing structure 500. The planetary ball mill mechanism includes a plurality of grinding jars 110, which are arranged on the upper grinding plate. Each grinding jar 110 can rotate around its own axis of rotation, and the plurality of grinding jars 110 can also revolve around the center of the upper grinding plate. The discharge structure 200 is used to temporarily store powder, which can flow out from the lower end of the discharge structure 200.

[0047] The aforementioned feeding structure 400 and sealing structure 500 are mounted on the rotary lifting structure 300, and rotate or lift under the drive of the rotary lifting structure 300. Specifically, the feeding structure 400 includes an intermediate silo 410 and a distribution silo 420. Several distribution silos 420 are arranged around the side of the intermediate silo 410, and the intermediate silo 410 is connected to each distribution silo. An inlet 411 is provided at the top of the intermediate silo 410 for the powder flowing out through the discharge structure 200. An outlet is provided at the bottom of the distribution silo 420. The powder is distributed from the intermediate silo 410 into each distribution silo 420, and flows one-to-one into each ball mill jar 110 through the outlet at the bottom of each distribution silo 420. It can be understood that the number of ball mill jars 110 is the same as the number of distribution silos 420.

[0048] The aforementioned sealing structure 500 includes a first sealing cap and a second sealing cap arranged coaxially. The first sealing cap is positioned above the second sealing cap, and the first and second sealing caps rotate relative to each other. A can lid 530 is provided on the second sealing cap, and the can lid 530 is rotatably mounted on the second sealing cap. It is understood that the number of ball mill jars 110 is the same as the number of can lids 530.

[0049] The alternating feeding structure has three states. When the alternating feeding structure is in the first state, the powder in the intermediate hopper 410 is equally divided into each discharge hopper in preparation for feeding the ball mill jar 110. During this period, the jar cover 530 in the sealing structure 500 presses onto the ball mill jar 110 and rotates with the ball mill jar 110.

[0050] In the first state, the ball mill jar 110 is in the grinding working state. During this working time, the intermediate hopper 410 diverts the powder, which improves the processing efficiency.

[0051] When the alternating feeding structure is in the second state, grinding is complete, the ball mill jar 110 stops rotating, and the feeding structure 400 and the sealing structure 500 rise synchronously. At this time, the intermediate hopper 410 receives the material discharged from the discharging structure 200 and stores it in the intermediate hopper 410, preparing for the second powder diversion. The sealing structure 500 moves away from the ball mill jar 110, and the suction device extends into the ball mill jar 110 to suck out the ground powder. The suction device can be implemented using existing technology, such as including a negative pressure pipe and a robotic arm that moves the negative pressure pipe. The robotic arm inserts the negative pressure pipe into the ball mill jar 110 to suck out the powder inside the jar.

[0052] When the alternating feeding structure is in the third state, the feeding structure 400 rotates to the top of the ball mill jar 110 and descends to feed material into the ball mill jar 110. After feeding is completed, the feeding structure 400 moves again to the bottom of the discharging structure 200, while the sealing structure 500 rotates to the top of the ball mill jar 110 and falls. After the ball mill jar 110 is covered by the jar cover 530, the ball mill jar 110 begins to work and perform grinding.

[0053] In this application, the powder in the discharge structure 200 is transferred to each ball mill jar 110 in one go by the linkage of the rotary lifting structure 300, the feeding structure 400 and the sealing structure 500, thus solving the problem of automated material distribution and feeding. At the same time, this application makes full use of the time for grinding and picking up powder. During the grinding and picking process, the discharge structure 200 is used to receive the discharge and the powder is diverted, which prepares for the subsequent feeding into the ball mill jar 110 and improves the grinding efficiency.

[0054] In this application, the rotary lifting structure 300 includes a first rotating mechanism 310 and a first lifting mechanism 320. The first lifting mechanism 320 is disposed on the first rotating mechanism 310, and the feeding structure 400 and the sealing structure 500 are disposed on the first lifting mechanism 320. The feeding structure 400 and the sealing structure 500 are centrally symmetrically arranged about the first lifting mechanism 320. It can be understood that, driven by the rotary lifting structure 300, the feeding structure 400 and the sealing structure 500 can realize rotation, lifting, and a combination of rotation and lifting.

[0055] In some embodiments of this application, the first lifting mechanism 320 is a lead screw assembly 321, the feeding structure 400 and the sealing structure 500 are disposed on the lead screw assembly 321, and the first rotating mechanism 310 includes a hollow rotating platform, on which a chassis 321c is fixed, and the lead screw assembly 321 is disposed on the hollow rotating platform. Driven by the hollow rotating platform, the chassis 321c rotates, thereby driving the lead screw assembly 321 to rotate.

[0056] Specifically, the lead screw assembly 321 includes a lead lever 321a and two guide rods 321b. The lower ends of the two guide rods 321b are fixed to the chassis 321c. The lead lever 321a passes through the chassis 321c and can rotate relative to the chassis 321c. The hollow rotary platform has an inner platform ring and an outer platform ring that can rotate relative to each other. The lower end of the lead lever 321a passes through the inner platform ring. The hollow rotary platform has the function of driving the outer platform ring to rotate. The outer ring is fixedly connected to the chassis 321c, so the chassis 321c can rotate with the outer ring without affecting the lead lever 321a. A lead screw drive for driving the lead lever 321a to rotate is provided at the lower end of the lead lever 321a. Preferably, the lead screw drive is a worm gear reducer.

[0057] A sliding unit 321d is also provided on the screw lever 321a. The sliding unit 321d is screwed to the screw lever 321a and is also slidably connected to the guide rod 321b. Driven by the screw lever 321a, the sliding unit 321d slides along the length of the guide rod. The aforementioned feeding structure 400 and sealing structure 500 are arranged on both sides of the sliding unit 321d to realize the synchronous lifting and rotation of the feeding structure 400 and the sealing structure 500.

[0058] In this embodiment, a rotary lifting structure 300 is used to simultaneously drive the feeding structure 400 and the sealing structure 500 to move. Only one rotary lifting structure 300 is needed to realize the movement of the two structures, which simplifies the complexity of the equipment and effectively reduces the cost of the equipment.

[0059] Preferably, this application further includes a gantry frame 321e, which is disposed above the rotary lifting structure 300. The lead screw assembly 321 also includes a top plate, which is disposed above the base plate 321c. The upper end of the guide column is fixed to the top plate, and the lead lever 321a passes through the top plate and rotates between it and the gantry frame 321e. In this embodiment, a top bearing is provided at the upper end of the lead lever 321a, and the top bearing is fixedly disposed on the gantry frame 321e. The lead lever 321a can rotate relative to the gantry frame 321e through the top bearing.

[0060] Preferably, an electromagnetic brake is also provided at the upper end of the lead screw 321a, and the electromagnetic brake is fixed on the gantry 321e. When the electromagnetic brake is de-energized, it does not interfere with the rotation of the lead screw 321a, that is, the lead screw 321a can still rotate relative to the gantry 321e. When the electromagnetic brake is energized, the electromagnetic brake clamps the lead screw 321a, and the lead screw 321a stops rotating to maintain the relative positions of the feeding structure 400, the sealing structure 500, the discharging structure 200, and the ball mill jar 110, so as to prevent the lead screw assembly 321 from shaking during the grinding process.

[0061] The use of the lead screw assembly 321 can maintain the stability of the feeding structure 400 and the capping structure 500 during the movement. At the same time, the lead screw assembly 321 converts the rotary motion into linear motion, which can ensure that the can lid 530 is placed on the ball mill jar 110.

[0062] In some embodiments of this application, a conical protrusion 412 is provided at the bottom of the intermediate silo 410, with the tip pointing upwards. The centerline of the protrusion 412 coincides with the centerline of the intermediate silo 410. The inlet 411 is located on the centerline of the intermediate silo 410. Several intermediate outlets for connecting to the distribution silo 420 are provided on the side of the intermediate silo 410. Preferably, the intermediate outlets are flush with the bottom of the protrusion 412. After the powder enters the intermediate silo 410 through the inlet 411, it is guided by the protrusion 412, slides along the surface of the protrusion 412 to the bottom, and enters the distribution silo 420 through the intermediate outlets.

[0063] Since the material entering the intermediate silo 410 is powder, the powder is affected by humidity and particle size, and is prone to sticking to the inner wall of the intermediate silo 410 and the upper surface of the protrusion 412. Therefore, a vibration mechanism is provided below the protrusion 412. The vibration mechanism vibrates the protrusion 412 in a time plane and at a point to alleviate the sticking phenomenon.

[0064] Specifically, the lower surface of the protrusion 412 has a cavity that is concave upwards, and the vibration mechanism is located inside the cavity. The vibration mechanism includes a first vibrator 413 and a force-receiving plate 415, wherein the force-receiving plate 415 is fixed inside the cavity and is fixedly connected to the protrusion 412. The first vibrator 413 is disposed between the bottom wall of the intermediate silo 410 and the protrusion 412. The first vibrator 413 acts on the force-receiving part, and transmits the vibration to the protrusion 412 and the intermediate silo 410 through the force-receiving part, thereby realizing the overall vibration of the protrusion 412 and the intermediate silo 410, thereby alleviating the wall adhesion phenomenon.

[0065] Due to the special properties of the powder, when the protrusion 412 is vibrated as a whole, some powder still adheres to the upper surface of the protrusion 412 and is not easy to slip off. Therefore, this application also solves the problem of powder adhering to the wall by using point vibration.

[0066] Specifically, a number of marbles 414 are arranged between the force plate 415 and the cavity. The marbles 414 are in a free state. When the force plate 415 is vibrated by the first vibrator 413, the marbles 414 on the force plate 415 bounce and randomly hit the lower surface of the protrusion 412, thereby achieving point vibration of the protrusion 412.

[0067] To increase the amplitude of point vibration and surface vibration, a spring is provided at the bottom of the protrusion 412. One end of the spring is fixed to the protrusion 412, and the other end is fixedly connected to the bottom wall of the intermediate hopper 410. Under the action of the spring, the vibration of the protrusion 412 can be amplified by the bouncing of the ball 414. Preferably, a sealing ring is provided between the protrusion 412 and the side wall of the intermediate hopper 410.

[0068] It is understood that a second vibrator is also installed on the side wall of each material distribution bin 420. The first vibrator 413 and the second vibrator are double-headed fan-shaped vibrators.

[0069] Furthermore, to ensure that the powder can flow smoothly into the distribution hopper 420 during the distribution process, the distribution hopper 420 is located at the lower middle end of the intermediate hopper 410.

[0070] Each distribution bin 420 is also equipped with a first sealing mechanism 430, which is used to close the intermediate discharge port and open the intermediate discharge port at a specific time for material distribution. The first sealing mechanism 430 includes a guide pipe, an intermediate sealing plug, and a pushing unit. The guide pipe is arranged radially along the intermediate bin 410 and is connected to the intermediate discharge port. The guide pipe is a rigid pipe. The intermediate sealing plug slides along the length of the guide pipe under the push of the pushing unit. When the intermediate sealing plug enters the guide pipe, the powder in the intermediate bin 410 cannot flow into the distribution bin 420 through the intermediate discharge port. When the intermediate sealing plug leaves the guide pipe, the powder in the intermediate bin 410 flows into the distribution bin 420. The first sealing mechanism 430 is open in the first state.

[0071] Each material distribution bin 420 is also equipped with a laser sensor for determining whether the material distribution bin 420 is full. Preferably, each material distribution bin 420 is equipped with two laser sensors, one of which is used to determine whether the material distribution bin 420 is full and the other is used to determine whether the material distribution bin 420 is empty.

[0072] The feeding structure 400 also includes a second rotating mechanism 440, a second lifting mechanism 450, and a bottom sealing plug. The second rotating mechanism 440, the second lifting mechanism 450, and the bottom sealing plug constitute a second sealing mechanism, which is used to close the discharge port.

[0073] Since the distribution bins 420 are located at the lower middle end of the intermediate bins 410, a vacant area is formed below the intermediate bins 410, and the aforementioned second sealing mechanism is located in this area. Specifically, a mounting plate is provided in this area, located below the intermediate bins 410, and fixedly connected to the side walls of each distribution bin 420. The second rotating mechanism 440 is mounted on the mounting plate, and the second lifting mechanism 450 is mounted on the second rotating mechanism 440. Driven by the second rotating mechanism 440, the second lifting mechanism 450 rotates. The bottom of the second lifting mechanism 450 is provided with a base frame for placing several bottom sealing plugs. The second lifting mechanism 450 drives the base frame to rise and fall, causing the bottom sealing plugs to seal the discharge port.

[0074] Specifically, the second rotating mechanism 440 includes a rotating shaft rotatably mounted on the mounting plate and a shaft drive. The shaft drive drives the rotating shaft to rotate. In this embodiment, the shaft drive and the rotating shaft are connected by a sprocket transmission. The aforementioned second lifting mechanism 450 is fixed below the rotating shaft. Preferably, the second lifting mechanism 450 is a linear actuator such as an electric cylinder.

[0075] To ensure the can lid 530 accurately rests on the ball mill jar 110, a first sensor assembly is mounted on the second lifting mechanism 450, and a second sensor assembly is mounted on the second rotating mechanism 440. The first sensor assembly determines the relative height between the discharge port and the bottom sealing plug, while the second sensor assembly determines the relative angle between the bottom sealing plug and the discharge port. Specifically, the first sensor assembly includes a first transmitter and a first receiver. The first transmitter is fixed to the second lifting mechanism 450, and the first receiver is mounted on the side wall of the distribution hopper 420. The first transmitter rises and falls with the second lifting mechanism 450. When the first receiver receives a signal from the first transmitter, it determines that the relative height between the discharge port and the bottom sealing plug is zero, and therefore considers the discharge port and the bottom sealing plug to be on the same horizontal plane. The second sensor assembly includes a second transmitter and a second receiver. The second transmitter is fixed to the second rotating mechanism 440, and the second receiver is fixed to the side wall of the distribution hopper 420. The second transmitter rotates with the rotating mechanism. When the second receiving end receives the signal from the second transmitting end, it determines that the angle between the discharge port and the bottom sealing plug on the horizontal plane is zero. It is considered that the discharge port coincides with the bottom sealing plug at this time. The first sensor assembly and the second sensor assembly can ensure that the bottom sealing plug seals the discharge port to prevent material leakage.

[0076] The second rotating mechanism 440 and the second lifting mechanism 450 operate in the third state. During feeding, the second rotating mechanism 440 and the second lifting mechanism 450 operate simultaneously to open the discharge port. After a preset time, the feeding is completed. The second rotating mechanism 440 acts before the second lifting mechanism 450. The second rotating mechanism 440 rotates the bottom sealing plug to directly below the discharge port. When the second lifting mechanism 450 determines that the bottom sealing plug has rotated to directly below the discharge port, the second lifting mechanism 450 drives the bottom sealing plug to rise until the first receiving end receives the signal from the first transmitting end and stops rising.

[0077] Furthermore, to ensure that the sealing structure 500 rotates synchronously with the planetary ball mill structure 100 and to prevent the grinding balls inside from flying out of the grinding jar 110, the sealing structure 500 also includes a first rotating unit 540. The first rotating unit 540 is located at the center of the first cover plate and the second cover plate. Under the action of the first rotating unit 540, the first cover plate and the second cover plate can rotate relative to each other. The first cover plate is connected to the aforementioned sliding unit 321d and is lifted, lowered, and rotated under the drive of the sliding unit 321d. A plurality of second rotating units are provided on the lower surface of the second cover plate, and a jar lid 530 is rotatably mounted on each second rotating unit. The jar lid 530 can rotate with the second cover plate through the second rotating unit. The first rotating unit 540 and the second rotating unit are both self-aligning ball bearings with cylindrical bores. These bearings have self-aligning properties and mainly bear radial loads, while also bearing a small amount of axial loads. By using self-aligning ball bearings with cylindrical bores, the precision requirements of the jar cover 530 and the grinding jar 110 can be reduced, ensuring that the jar cover 530 can be placed on the grinding jar 110 in a one-to-one correspondence, and that the jar cover 530 can revolve and rotate with the grinding jar 110.

[0078] Furthermore, a leveling mechanism 560 is provided between the first cover plate 510 and the second cover plate 520. The leveling mechanism 560 includes a sleeve 561 and a buffer column 562. The sleeve 561 passes through the first cover plate 510, and the buffer column 562 is disposed within the sleeve 561. An elastic element 563 is sleeved on the upper part of the buffer column 562. One end of the elastic element 563 abuts against the lower end of the buffer column 562, and the other end abuts against the lower surface of the first cover plate 510. Under the action of the elastic element 563, the buffer column 562 tends to move towards the second cover plate 520. A universal joint bearing 564 is provided at the lower end of the buffer column 562, and the universal joint bearing 564 abuts against the second cover plate 520.

[0079] In this application, because the grinding jar 110 contains grinding balls and materials, the upper grinding plate on which the grinding jar 110 is located cannot be guaranteed to be level. Under the action of the leveling mechanism 560, when the jar lid 530 is placed on the grinding jar 110, the first sealing plate 510 will adaptively deflect to ensure that each jar lid 530 is placed on the grinding jar 110. After the first sealing plate 510 rises, it will return to a level state under the action of the leveling mechanism 560, preparing for the next time the grinding jar 110 is covered. The leveling mechanism 560 can prevent the first sealing plate 510 from tilting after the jar lid 530 has been placed on the grinding jar 110 multiple times, thus preventing the jar lid 530 from being placed on the grinding jar 110.

[0080] In addition, a universal bearing 564 is provided below the buffer column 562, which converts the original sliding friction between the second cover plate 520 and the buffer column 562 into rolling friction, thereby reducing the frictional resistance between the second cover and the buffer column 562.

[0081] When the sealing structure 500 is placed on the grinding jar 110 and the grinding jar 110 is rotating, under the action of the second rotating unit, each jar lid 530 rotates with the grinding jar 110, while the second sealing plate 520 revolves with several grinding jars 110 under the action of the first rotating unit 540. During the grinding process of the grinding jar 110, the sealing structure 500 is always placed on the grinding jar 110.

[0082] Preferably, a third sensor assembly is also provided on the second cover plate 520. The third sensor assembly is used to determine the positional relationship between the grinding jar 110 and the jar cover 530, ensuring that the grinding jar 110 is directly below the jar cover 530 when the jar cover 530 is placed on the grinding jar 110. If the grinding jar 110 is not directly below the jar cover 530, its position is adjusted by revolution. Using a servo motor to control the rotation angle of the grinding jar 110 and using a sensor to determine the relative angle between two objects are both existing technologies, and this application does not involve any improvement to the planetary grinding structure 100, so it will not be described in detail.

[0083] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An alternating feeding structure suitable for a planetary ball mill, characterized in that, include: The planetary ball mill structure (100) includes several ball mill jars (110). Material feeding structure (200); Rotary lifting structure (300); The feeding structure (400) and the sealing structure (500) are mounted on the rotary lifting structure (300) and rotate or lift under the drive of the rotary lifting structure (300). The feeding structure (400) includes an intermediate hopper (410) and a distribution hopper (420) located on the side of the intermediate hopper (410) and connected to the intermediate hopper (410). The top of the intermediate hopper (410) is provided with a feed inlet (411), and the bottom of the distribution hopper (420) is provided with a discharge outlet. The sealing structure (500) includes a first sealing plate (510) and a second sealing plate (520) arranged coaxially. The first sealing plate (510) is disposed above the second sealing plate (520). The first sealing plate (510) and the second sealing plate (520) rotate relative to each other. The second sealing plate (520) is provided with a number of jar lids (530) consistent with the number of the ball mill jars (110). The jar lids (530) are rotatably disposed on the second sealing plate. The alternating feeding structure has three states. When the alternating feeding structure is in the first state, the powder in the intermediate silo (410) is diverted to the distribution silo (420), and the silo cover (530) is pressed on the ball mill jar (110). When the alternating feeding structure is in the second state, the feeding structure (400) and the sealing structure (500) rise, and the intermediate silo (410) receives the powder from the discharging structure (200). When the alternating feeding structure is in the third state, the feeding structure (400) rotates to the top of the ball mill jar (110) and moves downward to feed the powder into the ball mill jar (110). The rotary lifting structure (300) includes a first rotary mechanism (310) and a first lifting mechanism (320), the first lifting mechanism (320) is disposed on the first rotary mechanism (310), and the feeding structure (400) and the sealing structure (500) are disposed on the first lifting mechanism (320); The intermediate silo (410) has several intermediate discharge ports on its side. Each of the sub-silos (420) is connected to the intermediate silo (410) through the intermediate discharge ports. A first sealing mechanism (430) is provided at the intermediate discharge port. The first sealing mechanism (430) is used to close the intermediate discharge port. The feeding structure (400) further includes a second rotating mechanism (440) and a second lifting mechanism (450). The second lifting mechanism (450) is disposed on the second rotating mechanism (440). The second rotating mechanism (440) is disposed between each of the material distribution bins (420). The second lifting mechanism (450) is provided with a plurality of bottom sealing plugs for closing the discharge port. The second lifting mechanism (450) is equipped with a first sensor assembly for determining the relative height between the discharge port and the bottom sealing plug; The second rotating mechanism (440) is provided with a second sensor assembly for determining the relative angle between the discharge port and the sealing plug.

2. The alternating feeding structure for a planetary ball mill according to claim 1, characterized in that: The first lifting mechanism (320) is a lead screw assembly (321), the feeding structure (400) and the sealing structure (500) are disposed on the lead screw assembly (321), the first rotating mechanism (310) includes a hollow rotating platform, a chassis (321c) is fixed on the hollow rotating platform, and the lead screw assembly (321) is disposed on the hollow rotating platform.

3. The alternating feeding structure for a planetary ball mill according to claim 1, characterized in that: The bottom of the intermediate silo (410) is provided with a protrusion (412), and a vibration mechanism is provided below the protrusion (412). The vibration mechanism applies point vibration and surface vibration to the protrusion (412). The vibration mechanism includes a first vibrator (413) disposed below the protrusion (412) and a force plate (415) disposed above the first vibrator (413). The lower surface of the protrusion (412) forms an upwardly recessed cavity. The force plate (415) and the first vibrator (413) are disposed in the cavity. The force plate (415) is fixedly connected to the protrusion (412). The first vibrator (413) acts on the force plate (415). A number of marbles (414) are arranged between the force plate (415) and the cavity, and the marbles (414) are in a free state.

4. The alternating feeding structure for a planetary ball mill according to claim 1, characterized in that: A first rotating unit (540) is provided at the center of the first cover plate (510) and the second cover plate (520), and the first rotating unit (540) is rotatably connected to the first cover plate (510) and the second cover plate (520). The second cover plate (520) is provided with a second rotating unit in the same number as the ball mill jar (110). The jar cover (530) and the second cover plate (520) are mounted on the second cover plate (520) through the second rotating unit. Both the first rotating unit (540) and the second rotating unit are self-aligning ball bearings with cylindrical bores.

5. The alternating feeding structure for a planetary ball mill according to claim 4, characterized in that: A leveling mechanism (560) is also provided between the first cover plate (510) and the second cover plate (520). The leveling mechanism (560) includes a sleeve (561) provided on the first cover plate (510). A buffer column (562) is inserted into the sleeve (561). An elastic element (563) is provided on the buffer column (562). One end of the elastic element (563) abuts against the buffer column (562) and the other end abuts against the first cover plate (510). A universal bearing (564) that abuts against the second cover plate (520) is also provided at the bottom end of the buffer column (562).

6. The alternating feeding structure for a planetary ball mill according to claim 5, characterized in that: The center of the second cover plate (520) is provided with a third sensor assembly for determining the positional relationship between the can lid (530) and the ball mill jar (110).

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