Automatic ball feeder for ball mill

Abstract

The application discloses a kind of automatic ball feeder for steel ball of ball mill, including automatic ball feeder for steel ball of ball mill, including ball storage unit, push plate feeder and the L-shaped conveying groove of inclination arrangement;It further includes overload protection unit, can automatically discharge the excessive steel ball added in the ball storage chamber and store separately, and when a certain amount of steel ball in the ball storage chamber is discharged from the discharge opening, the steel ball stored separately can be automatically added to the ball storage chamber.The automatic ball feeder is provided with overload protection unit, which can automatically unload overload, and by the height change of ball storage chamber during work, the unloaded steel ball is automatically added to the ball storage chamber, which can effectively avoid the overload of ball storage chamber, and also avoid unnecessary trouble caused by manually adding the steel ball stored separately to the ball storage chamber again.

Description

Technical Field

[0001] This invention relates to the field of automatic ball feeder technology, and particularly to an automatic steel ball feeder for ball mills. Background Technology

[0002] A ball mill is a type of grinding mill. It has a hollow cylinder containing heavy steel balls (grinding media) for grinding the material. The working principle of a ball mill mainly relies on the impact and friction of the steel balls inside the cylinder. When the cylinder rotates, the grinding media (steel balls) added into the cylinder by an automatic ball feeder impact and grind the material inside the cylinder due to inertia and centrifugal force. The material is fed evenly into the mill through the screw conveyor in the hollow feed shaft, and after grinding, it is discharged through the discharge grate.

[0003] The existing automatic ball feeder for ball mills mainly includes a ball storage chamber with a vibrating motor, a pusher plate feeder, and an inclined conveying trough for guiding the steel balls. The vibrating motor causes the steel balls in the ball storage chamber to fall onto the pusher plate feeder, which then pushes the steel balls into the conveying trough. Because the conveying trough is inclined, the steel balls in the conveying trough move along the path of the conveying trough under their own gravity and eventually enter the cylinder of the ball mill.

[0004] Between each grinding operation of the ball mill, a sufficient amount of steel balls needs to be added to the automatic ball feeder to ensure the orderly progress of subsequent grinding. Generally, a grab bucket is used to repeatedly grab the steel balls from the ball pool and send them to the ball storage chamber. In actual addition, the steel balls in the ball storage chamber are often overloaded because the amount of steel balls grabbed in the last grab cannot be accurately controlled. Overloaded steel balls will result in insufficient vibration in the ball storage chamber, and the steel balls inside are prone to blockage and jamming, affecting the feeding of steel balls. It can also easily cause the vibration motor to overload. Prolonged overload may cause the vibration motor to overheat or even burn out, thus affecting the normal operation of the entire automatic ball feeder. Therefore, this application provides an automatic steel ball feeder for ball mills to meet the requirements. Summary of the Invention

[0005] The purpose of this application is to provide an automatic ball feeder for ball mills, which solves the technical problem that existing automatic ball feeders are prone to overload during feeding.

[0006] To achieve the above objectives, this application provides the following technical solution: an automatic ball feeder for ball mills, comprising a ball storage unit, a pusher plate feeder, and an inclined L-shaped conveying trough;

[0007] The ball storage unit includes a ball storage chamber with an open top. A feeding opening is provided on the left side of the ball storage chamber. The ball storage chamber is located inside the outer shell. The bottom of the ball storage chamber is connected to the outer shell through a vibration spring. A vibration motor is installed at the bottom of the ball storage chamber. The left and top ends of the outer shell are both open.

[0008] The feeding opening is connected to the receiving opening of the push plate feeding machine;

[0009] The L-shaped conveying trough is set at an angle downwards, and the feed end of the L-shaped conveying trough is connected to the discharge end of the push plate feeder. The discharge end of the L-shaped conveying trough is located above the feed inlet of the ball mill.

[0010] A single feeder is provided at the discharge end of the L-shaped conveying trough. The single feeder includes two plates that slide through the L-shaped conveying trough, and the two plates are respectively connected to the output end of the corresponding drive cylinder. Both drive cylinders are installed on the outer wall of the L-shaped conveying trough.

[0011] It also includes an overload protection unit that can automatically discharge excess steel balls added to the ball storage chamber and store them separately, and automatically add the separately stored steel balls to the ball storage chamber after a certain number of steel balls have been discharged from the discharge opening in the ball storage chamber.

[0012] As a preferred embodiment of this embodiment, the overload protection unit includes a discharge notch provided at the upper right end of the ball storage chamber, a receiving groove fixedly installed on the inner wall of the outer shell and located below the discharge notch, a discharge opening provided on the right wall of the ball storage chamber, a feed plate rotatably disposed in the inner cavity of the discharge opening via a first rotating shaft, and a second one-way drive gear rotatably disposed on the outer wall of the ball storage chamber via a second rotating shaft.

[0013] The inner cavity of the receiving trough is inclined with a guide plate, and the bottom plate of the receiving trough is inclined and the guide plate is arranged in a figure-eight shape. A baffle is slidably installed through the bottom plate, and the lower end of the baffle is connected to the receiving trough by a connecting spring. The lower end of the baffle is connected to a winding wheel installed on a third rotating shaft by a first pull rope. The third rotating shaft is rotatably installed at the bottom of the receiving trough. A first one-way drive gear is installed on the end of the third rotating shaft. A first toothed plate is provided on the upper left side of the first one-way drive gear. The first toothed plate is fixedly installed on the outer wall of the ball storage chamber.

[0014] A discharge port is provided on the side wall of the receiving trough near the discharge opening;

[0015] A second toothed plate is provided on the upper left side of the second one-way drive gear, and the second toothed plate is installed on the inner wall of the housing. The winding wheel on the second rotating shaft is connected to the mounting column fixed on the outer wall of the side end of the feed plate through the second pull rope. An arc-shaped opening adapted to the movement of the mounting column is provided on the outer wall of the ball storage chamber. The second pull rope is sleeved on the guide wheel assembly. The guide wheel assembly is located above the arc-shaped opening, and the second one-way drive gear is located below the guide wheel assembly.

[0016] As a preferred embodiment of this invention, a slowing unit is also included to hinder and cause the feed plate to slowly return to its original position.

[0017] In a preferred embodiment of this invention, the mitigation unit includes a hollow tube fixedly installed around the second rotating shaft. The hollow tube has two mounting rings arranged opposite each other in its inner cavity. A cylinder is rotatably arranged between the two mounting rings via a mounting shaft, and an arc-shaped block with an increasingly larger deflection angle is arranged around the cylinder.

[0018] The outer wall of the cylinder is tightly fitted with an elastic sleeve fixedly sleeved on the outer wall of the second rotating shaft;

[0019] Two first blocks are fixed on the mounting shaft, and a second block is provided on the inner wall of the mounting ring.

[0020] As a preferred embodiment of this invention, it further includes a contactless drive unit for controlling the first toothed plate to drive the first unidirectional drive gear to rotate without contact and for controlling the second toothed plate to drive the second unidirectional drive gear to rotate without contact.

[0021] In a preferred embodiment of this invention, the first toothed plate and the second toothed plate have the same structure, the first unidirectional drive gear and the second unidirectional drive gear have the same structure, and the contactless drive unit includes a plurality of first permanent magnets and a plurality of second permanent magnets. The plurality of first permanent magnets are respectively mounted on the two meshing inclined surfaces of the drive teeth on the corresponding first unidirectional drive gear, and the plurality of second permanent magnets are respectively mounted on the two meshing inclined surfaces of the drive teeth on the corresponding first toothed plate. The drive teeth have an isosceles structure, and the outward-facing magnetic poles of the plurality of first permanent magnets and the plurality of second permanent magnets are the same.

[0022] In a preferred embodiment of this invention, the magnetic strength ratio of the first permanent magnet to the second permanent magnet is:

[0023] In a preferred embodiment of this invention, the inclination angles of the two meshing inclined surfaces on the drive tooth are both between 32° and 37°.

[0024] In a preferred embodiment of this invention, a movable plate is fixedly installed at the lower left end of the ball storage chamber.

[0025] In summary, the technical effects and advantages of this invention are as follows:

[0026] The present invention has a reasonable structure. The automatic ball feeder is equipped with an overload protection unit, which can automatically unload the ball under overload. By changing the height of the ball storage chamber during operation, the unloaded steel balls are automatically added to the ball storage chamber, which can effectively prevent the ball storage chamber from being overloaded. It also avoids the unnecessary trouble caused by manually adding separately stored steel balls back to the ball storage chamber.

[0027] In this invention, a slowing unit is provided to reduce the reset speed of the feed plate, which is beneficial for the feed plate to pass over the baffle and enter the ball storage chamber without colliding with the feed plate.

[0028] In this invention, the contactless drive unit enables contactless driving between the tooth plate and the gear, which avoids tooth breakage and also helps to improve the vibration intensity of the ball storage chamber. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram showing the overall and partially enlarged structure of the present invention;

[0031] Figure 2 for Figure 1 Schematic diagram of the disassembled structure of the central storage sphere chamber and the outer shell;

[0032] Figure 3 for Figure 2 A schematic diagram of the structure of the central storage sphere from below;

[0033] Figure 4 for Figure 2 Schematic diagram of a partial cross-sectional structure of the central storage sphere chamber;

[0034] Figure 5 for Figure 4 A magnified view of the structure at point A in the middle;

[0035] Figure 6 for Figure 4 Schematic diagram of the connection structure between the middle feed plate and the second one-way drive gear;

[0036] Figure 7 for Figure 6Schematic diagram of partial disassembly and cross-sectional structure of the medium mitigation unit;

[0037] Figure 8 for Figure 6 A schematic diagram of the partial front view of the mitigation unit.

[0038] In the diagram: 1. Outer shell; 2. Ball storage chamber; 3. Discharge opening; 4. Push plate feeder; 5. L-shaped conveyor trough; 6. Drive cylinder; 7. Plate; 8. Vibration spring; 9. Vibration motor; 10. Movable plate; 11. Receiving trough; 12. Third rotating shaft; 13. First one-way drive gear; 131. First permanent magnet; 14. First pull rope; 15. Guide inclined plate; 16. Baffle; 17. Connecting spring; 18. First toothed plate; 181. Second permanent magnet; 19. Feed plate; 20. First rotating shaft; 21. Mounting column; 22. Second pull rope; 23. Second one-way drive gear; 24. Second toothed plate; 25. Guide wheel assembly; 26. Second rotating shaft; 27. Hollow tube; 28. Mounting ring; 29. ​​Cylinder; 30. First stop block; 31. Arc block; 32. Elastic sleeve; 33. Discharge notch; 34. Second stop block. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example: Reference Figure 1-3 The automatic ball feeder for a ball mill shown includes a ball storage unit, a pusher plate feeder 4, and an inclined L-shaped conveying trough 5.

[0041] The ball storage unit includes a ball storage chamber 2 with an open top. A feeding opening 3 is provided on the left side of the ball storage chamber 2. The ball storage chamber 2 is located inside the outer shell 1. The bottom of the ball storage chamber 2 is connected to the outer shell 1 through a vibration spring 8. A vibration motor 9 is installed at the bottom of the ball storage chamber 2. The left and top ends of the outer shell 1 are both open.

[0042] The feeding opening 3 is connected to the receiving opening of the push plate feeder 4;

[0043] The L-shaped conveyor trough 5 is set at an angle downwards. The feed end of the L-shaped conveyor trough 5 is connected to the discharge end of the push plate feeder 4. The discharge end of the L-shaped conveyor trough 5 is located above the feed inlet of the ball mill.

[0044] A single feeder is provided at the discharge end of the L-shaped conveying trough 5. The single feeder includes two plates 7 that slide through the L-shaped conveying trough 5. The two plates 7 are respectively connected to the output end of the corresponding drive cylinder 6. Both drive cylinders 6 are installed on the outer wall of the L-shaped conveying trough 5.

[0045] It also includes an overload protection unit that can automatically discharge excess steel balls added to the ball storage chamber 2 and store them separately. Furthermore, after a certain number of steel balls are discharged from the discharge opening 3 in the ball storage chamber 2, the separately stored steel balls can be automatically added back into the ball storage chamber 2.

[0046] By setting up an overload protection unit, when adding balls to the ball storage chamber 2, excess steel balls added to the ball storage chamber 2 can be automatically discharged and stored separately. Furthermore, when a certain number of steel balls are discharged from the discharge opening 3 in the ball storage chamber 2 (generally when the steel balls in the ball storage chamber 2 are almost gone), the separately stored steel balls can be automatically added to the ball storage chamber 2. This can effectively prevent the ball storage chamber 2 from overloading and also avoid unnecessary trouble caused by manually adding separately stored steel balls back into the ball storage chamber 2.

[0047] It should be noted that, firstly, when this ball-adding machine is in use, it pushes steel balls into the L-shaped conveyor trough 5 via the pusher plate feeder 4. Because the L-shaped conveyor trough 5 is inclined, the steel balls entering the trough move along the L-shaped path under their own gravity and eventually contact the plate 7. To ensure precise control of the ball-adding amount, single-ball addition is used. First, the first drive cylinder 6, which is closest to the steel ball, moves the first plate 7 outward. Without the obstruction of the first plate 7, the steel ball will contact the second plate 7. Then, the first drive cylinder 6 moves the plate 7 back to its original position, thus adding the steel ball... The second drive cylinder 6 is then controlled to move the second plate 7 outward, removing the obstruction to the steel ball. At this point, the steel ball moves under its own gravity and eventually enters the ball mill. Then, the second drive cylinder 6 is controlled to move the second plate 7 back to its original position. Second, the L-shaped conveying trough 5 includes a first straight section and a second straight section arranged in an L-shape. The first straight section is set obliquely downward relative to the discharge end of the push plate feeder 4, while the second straight section, which is away from the push plate feeder 4, is set obliquely downward relative to the first straight section. This arrangement is conducive to the movement of the steel ball in the L-shaped conveying trough 5 by its own gravity.

[0048] As a preferred embodiment of this example, Figure 4 As shown, the overload protection unit includes a discharge notch 33 provided at the upper right end of the ball storage chamber 2, a receiving groove 11 fixedly installed on the inner wall of the outer shell 1 and located below the discharge notch 33, a discharge opening provided on the right wall of the ball storage chamber 2, a feed plate 19 rotatably provided in the inner cavity of the discharge opening via a first rotating shaft 20, and a second one-way drive gear 23 rotatably provided on the outer wall of the ball storage chamber 2 via a second rotating shaft 26.

[0049] The inner cavity of the receiving trough 11 is inclined with a guide plate 15, and the bottom plate of the receiving trough 11 is inclined and the guide plate 15 is arranged in a figure-eight shape. A baffle 16 is slidably installed through the bottom plate, and the lower end of the baffle 16 is connected to the receiving trough 11 through a connecting spring 17. The lower end of the baffle 16 is connected to a winding wheel installed on the third rotating shaft 12 through a first pull rope 14. The third rotating shaft 12 is rotatably installed at the bottom of the receiving trough 11. A first one-way drive gear 13 is installed on the end of the third rotating shaft 12. A first toothed plate 18 is provided on the upper left side of the first one-way drive gear 13. The first toothed plate 18 is fixedly installed on the outer wall of the ball storage chamber 2.

[0050] A discharge port is provided on the side wall of the receiving trough 11 near the discharge opening;

[0051] A second toothed plate 24 is provided on the upper left side of the second one-way drive gear 23, and the second toothed plate 24 is installed on the inner wall of the housing 1. The winding wheel on the second rotating shaft 26 is connected to the mounting column 21 fixed on the outer wall of the side end of the feed plate 19 through the second pull rope 22. An arc-shaped opening adapted to the movement of the mounting column 21 is provided on the outer wall of the ball storage chamber 2. The second pull rope 22 is sleeved on the guide wheel assembly 25. The guide wheel assembly 25 is located above the arc-shaped opening, and the second one-way drive gear 23 is located below the guide wheel assembly 25.

[0052] When steel balls are added to the ball storage chamber 2 using a grab bucket, the chamber moves downwards and the vibration spring 8 is compressed. As the ball storage chamber 2 moves downwards, its first toothed plate 18 and second toothed plate 24 move below the first one-way drive gear 13 and the second one-way drive gear 23, respectively. (During this process, the first toothed plate 18 and the first one-way drive gear 13, or the second toothed plate 24 and the second one-way drive gear 23, will engage and disengage. During the downward engagement process, since the first one-way drive gear 13 and the second one-way drive gear 23 are one-way drive structures, they cannot drive the third rotating shaft 12 and the second rotating shaft 26 to rotate, respectively.) As more steel balls are added, excess steel balls (i.e., overloaded steel balls) are released. The steel balls will be automatically discharged from the unloading gap 33 into the receiving trough 11. The steel balls in the receiving trough 11 are blocked by the baffle 16 (at this time, the operator stops adding more balls). During operation, as the number of steel balls in the ball storage chamber 2 decreases, the ball storage chamber 2 slowly rises. When only the bottom layer (or a small number) of steel balls remain in the ball storage chamber 2, its first toothed plate 18 and second toothed plate 24 respectively engage with the first one-way drive gear 13 and the second one-way drive gear 23, and respectively drive the third rotating shaft 12 and the second rotating shaft 26 to rotate. The rotation of the third rotating shaft 12 can drive the first pull rope 14 to wind up and cause the baffle 16 to compress the connecting spring 17 to move downward. At the same time, the rotation of the second rotating shaft 26 will drive the second pull rope 22 to wind up. The winding of the second pull rope 22 can drive the feeding. The feed plate 19 rotates around the first rotating shaft 20, thereby opening the discharge opening. After the baffle 16 is released from obstruction of the steel balls in the feed trough 11, the feed plate 19 has rotated to a certain angle (rotation angle greater than 70°). At this time, the steel balls enter the ball storage chamber 2 from the discharge opening (at this time, the steel balls do not collide with the feed plate 19). As a large number of steel balls are added to the ball storage chamber 2 at the same time, the ball storage chamber 2 will move downward due to the increased weight. At this time, the first toothed plate 18 and the second toothed plate 24 both move downward. Under the elastic force of the connecting spring 17, the third rotating shaft 12 will rotate in the opposite direction and cause the baffle 16 to move upward to block the steel balls. The downward movement of the second toothed plate 24, the baffle 16 is driven by gravity and pulled by the second pull rope 22 The second rotating shaft 26 rotates in the opposite direction, allowing the baffle 16 to return to its original position. After the baffle 16 blocks the steel ball, the angle between the baffle 16 and the vertically arranged discharge opening is not less than 55°. This prevents the steel ball from colliding with the feed plate 19 during the feeding process, thus avoiding deformation and damage to the feed plate 19. (When the baffle 16 moves upward to block, some steel balls at the bottom of its receiving groove 11 will pass over the baffle 16 and enter the ball storage chamber 2. To prevent the steel ball from colliding with the feed plate 19, the angle between the baffle 16 and the vertically arranged discharge opening is not less than 55° after the baffle 16 blocks the steel ball.) Finally, the first toothed plate 18 and the second toothed plate 24 move to below the first one-way drive gear 13 and the second one-way drive gear 23, respectively.After the baffle 16 returns to its original position, as the number of steel balls inside the ball storage chamber 2 decreases, the ball storage chamber 2 will move upward again. The first toothed plate 18 and the second toothed plate 24 will respectively engage with the first one-way drive gear 13 and the second one-way drive gear 23, adding steel balls from the receiving trough 11 back into the ball storage chamber 2. This process is repeated until all steel balls in the receiving trough 11 are added into the ball storage chamber 2. When there are no steel balls in the receiving trough 11, as the ball storage chamber 2 moves upward, the first toothed plate 18 and the second toothed plate 24 will move above the first one-way drive gear 13 and the second one-way drive gear 23, respectively. This overload protection unit can automatically unload the steel balls and automatically add them back into the ball storage chamber 2 based on the change in the height of the ball storage chamber 2 during operation.

[0053] It should be noted that: First, during the process of adding balls to the ball storage chamber 2, the unloading notch 33 is always located above the receiving trough 11, which is conducive to the overloaded steel balls entering the receiving trough 11 through the unloading notch 33; Second, the baffle 16 is located in the middle of the bottom plate of the receiving trough 11, which can prevent the steel balls in the receiving trough 11 from having a high speed and causing a violent collision with the rising baffle 16. It is also conducive to the steel balls that cross the rising baffle 16 entering the ball storage chamber 2 when the angle between the baffle 16 and the vertically set unloading opening is not less than 55° after the baffle 16 blocks the steel balls; Third, the unloading notch 33 can be designed according to the different loads of each ball adding machine, so that the overloaded steel balls can automatically enter the receiving trough 11 through the unloading notch 33; Fourth, the bottom of the feed plate 19 is provided with an L-shaped blocking step, and the bottom of the inner cavity of the unloading opening is provided with a blocking strip adapted to the L-shaped blocking step.

[0054] As a preferred embodiment of this invention, a slowing unit is also included to hinder and cause the feed plate 19 to slowly return to its original position.

[0055] The purpose of setting up the deceleration unit is to reduce the reset speed of the feed plate 19, so that it can pass over the baffle 16 and enter the ball storage chamber 2 without colliding with the feed plate 19.

[0056] As a preferred embodiment of this example, Figure 6-8 As shown, the mitigation unit includes a hollow tube 27 fixedly installed around the second rotating shaft 26. Two mounting rings 28 are arranged opposite each other in the inner cavity of the hollow tube 27. A cylinder 29 is rotatably arranged between the two mounting rings 28 via the mounting shaft, and an arc-shaped block 31 with an increasingly larger deflection angle is arranged around the cylinder 29.

[0057] The outer wall of the cylinder 29 is in close contact with the elastic sleeve 32 fixedly fitted on the outer wall of the second rotating shaft 26;

[0058] Two first stops 30 are fixed on the mounting shaft, and a second stop 34 is provided on the inner wall of the corresponding mounting ring 28.

[0059] When the second toothed plate 24 moves upward, the second one-way drive gear 23 will drive the second rotating shaft 26 to rotate clockwise. (Reference) Figure 8 At this time, the second rotating shaft 26 drives the cylinder 29 to rotate counterclockwise through the friction between the elastic sleeve 32 and the cylinder 29, which can make the first stop block 30 on the right (reference) rotate counterclockwise. Figure 7 When the second toothed plate 24 contacts the second stop 34, it forms a block. At this time, the squeezing force between the cylinder 29 and the elastic sleeve 32 is small, and the baffle 16 rotates away from the discharge opening. When the second toothed plate 24 moves downward, the second rotating shaft 26 rotates counterclockwise and drives the cylinder 29 to rotate clockwise, so that the squeezing force between the arc block 31 and the elastic sleeve 32 gradually increases. When it is at its maximum, the first stop 30 on the far side forms a block with the second stop 34. At this time, the resistance to the restoration movement of the baffle 16 increases, and it slowly resets, which is conducive to passing over the baffle 16 and entering the ball storage chamber 2 without colliding with the feed plate 19 (providing sufficient time for the steel balls to enter the ball storage chamber 2).

[0060] As a preferred embodiment of this invention, it further includes a contactless drive unit for controlling the first toothed plate 18 to drive the first one-way drive gear 13 to rotate without contact and for controlling the second toothed plate 24 to drive the second one-way drive gear 23 to rotate without contact.

[0061] Since the ball storage chamber 2 uses the vibration motor 9 to vibrate and feed materials during operation, the toothed plate and gear are prone to tooth breakage due to vibration, which will also affect the vibration effect of the ball storage chamber 2.

[0062] As a preferred embodiment of this example, Figure 5 As shown, the first tooth plate 18 and the second tooth plate 24 have the same structure, the first one-way drive gear 13 and the second one-way drive gear 23 have the same structure, and the contactless drive unit includes multiple first permanent magnets 131 and multiple second permanent magnets 181. The multiple first permanent magnets 131 are respectively mounted on the two meshing inclined surfaces of the drive teeth on the corresponding first one-way drive gear 13, and the multiple second permanent magnets 181 are respectively mounted on the two meshing inclined surfaces of the drive teeth on the corresponding first tooth plate 18. The drive teeth have an isosceles structure, and the outward-facing magnetic poles of the multiple first permanent magnets 131 are the same.

[0063] By setting a first permanent magnet 131 and a second permanent magnet 181 on the first toothed plate 18, the second toothed plate 24, the first one-way drive gear 13 and the second one-way drive gear 23, the gears can be driven to rotate by magnetic pole repulsion, which can make the toothed plate and the gear drive without contact, thus avoiding the phenomenon of tooth breakage and also helping to improve the vibration intensity of the ball storage chamber 2.

[0064] It should be noted that the first toothed plate 18, the second toothed plate 24, the first one-way drive gear 13, and the second one-way drive gear 23 are all made of magnetic shielding material to minimize magnetic field interference.

[0065] In a preferred embodiment of this invention, the magnetic strength ratio of the first permanent magnet 131 and the second permanent magnet 181 is 1:1.

[0066] When the magnetic force ratio is 1:1, the repulsive force between the gear plate and the gear reaches a relatively stable equilibrium. This equilibrium helps reduce the additional friction and energy loss caused by uneven magnetic force, thereby improving transmission efficiency.

[0067] In a preferred embodiment of this invention, the inclination angles of the two meshing inclined surfaces on the drive teeth are both 32° to 37°.

[0068] Within this tilt angle range, the repulsive force between permanent magnets can be more effectively decomposed into a tangential component, i.e., the tangential repulsive force is maximized, which is the main power source for driving the gear rotation. The larger the tangential component, the higher the transmission efficiency is generally. At the same time, the tilt angle within this range helps to control the gap between the gear plate and the gear, avoiding a decrease in transmission efficiency due to excessive gap and avoiding unnecessary friction and wear due to excessively small gap.

[0069] As a preferred embodiment of this example, Figure 2 As shown, a movable plate 10 is fixedly installed at the lower left end of the ball storage chamber 2.

[0070] Its movable plate 10 can move with the ball storage chamber 2. Its movable plate 10 seals and blocks the gap between the bottom of the ball storage chamber 2 and the bottom of the inner cavity of the outer shell 1, preventing the steel ball from entering this gap and affecting the downward movement of the ball storage chamber 2.

[0071] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ball automatic feeder for a ball mill, characterized by: Including the ball storage unit, push plate feeding machine (4) and the L-shaped conveying groove (5) arranged obliquely; The ball storage unit includes a ball storage chamber (2) with an open upper end, a discharge opening (3) arranged on the left side end of the ball storage chamber (2), the ball storage chamber (2) is located in the inner cavity of the shell (1), the bottom of the ball storage chamber (2) is connected with the shell (1) through a vibration spring (8), a vibration motor (9) is installed at the bottom of the ball storage chamber (2), and the left end and the upper end of the shell (1) are both open; The discharge opening (3) is connected with the receiving opening of the push plate feeding machine (4); The L-shaped conveying groove (5) is arranged obliquely downward, the feeding end of the L-shaped conveying groove (5) is connected with the discharging end of the push plate feeding machine (4), and the discharging end of the L-shaped conveying groove (5) is located above the feeding port of the ball mill; A single feeder is arranged at the discharging end of the L-shaped conveying groove (5), the single feeder includes two plate bodies (7) which are slidably arranged through the L-shaped conveying groove (5), and the two plate bodies (7) are respectively connected with the output ends of corresponding drive cylinders (6), and the two drive cylinders (6) are both installed on the outer wall of the L-shaped conveying groove (5); It also includes an overload protection unit which can automatically discharge excess steel balls added in the ball storage chamber (2) and store them separately, and after a certain number of steel balls in the ball storage chamber (2) are discharged from the discharge opening (3), the separately stored steel balls can be automatically added to the ball storage chamber (2); The overload protection unit includes a discharging notch (33) arranged on the right side wall of the ball storage chamber (2), a receiving groove (11) fixedly installed on the inner cavity wall of the shell (1) and located below the discharging notch (33), a discharging opening arranged on the right side wall of the ball storage chamber (2), a feeding plate (19) rotatably arranged in the inner cavity of the discharging opening through a first rotating shaft (20), and a second one-way drive gear (23) rotatably arranged on the outer wall of the ball storage chamber (2) through a second rotating shaft (26); The inner cavity of the receiving groove (11) is obliquely provided with a guide inclined plate (15), the bottom plate of the receiving groove (11) is obliquely arranged, and the guide inclined plates (15) are arranged in an eight-character shape, a baffle (16) is slidably arranged on the bottom plate, the lower end of the baffle (16) is connected with the receiving groove (11) through a connecting spring (17), the lower end of the baffle (16) is connected with a winding wheel installed on a third rotating shaft (12) through a first pull rope (14), the third rotating shaft (12) is rotatably arranged at the bottom of the receiving groove (11), a first one-way drive gear (13) is installed on the end of the third rotating shaft (12), a first toothed plate (18) is arranged above the left side of the first one-way drive gear (13), and the first toothed plate (18) is fixedly arranged on the outer wall of the ball storage chamber (2); A discharge port is arranged on the side wall of the receiving groove (11) close to the discharging opening. The left side of the second one-way drive gear (23) is provided with a second toothed plate (24), and the second toothed plate (24) is installed on the inner wall of the shell (1). The winding wheel on the second rotating shaft (26) is connected with the mounting column (21) fixed on the outer wall of the side end of the feeding plate (19) through a second pull rope (22). The outer wall of the ball storage chamber (2) is provided with an arc-shaped opening matched with the movement of the mounting column (21). The second pull rope (22) is sleeved on a guide wheel set (25), and the guide wheel set (25) is located above the arc-shaped opening. The second one-way drive gear (23) is located below the guide wheel set (25).

2. The automatic ball feeder for a ball mill according to claim 1, characterized in that: It also includes a slowing unit for hindering and slowly restoring the feeding plate (19) to its original position.

3. The automatic ball feeder for a ball mill according to claim 2, characterized in that: The slowing unit includes a hollow tube (27) fixedly installed on the periphery of the second rotating shaft (26). The inner cavity of the hollow tube (27) is oppositely provided with two mounting rings (28). A cylinder (29) is rotatably arranged between the two mounting rings (28) through a mounting shaft. The periphery of the cylinder (29) is provided with arc-shaped blocks (31) with increasing deflection angles. The outer wall of the cylinder (29) is tightly attached to the elastic sleeve (32) fixedly sleeved on the outer wall of the second rotating shaft (26). The mounting shaft is fixedly provided with two first stop blocks (30), and the inner wall of the mounting ring (28) is provided with a second stop block (34).

4. The automatic ball feeder for a ball mill according to claim 1, characterized in that: It also includes a non-contact driving unit for controlling the first toothed plate (18) to non-contact drive the first one-way drive gear (13) to rotate and for controlling the second toothed plate (24) to non-contact drive the second one-way drive gear (23) to rotate.

5. The automatic ball feeder for a ball mill according to claim 4, characterized in that: The first toothed plate (18) and the second toothed plate (24) have the same structure, the first one-way drive gear (13) and the second one-way drive gear (23) have the same structure, the non-contact driving unit includes a plurality of first permanent magnets (131) and a plurality of second permanent magnets (181). The plurality of first permanent magnets (131) are respectively installed on the two engaging inclined surfaces of the driving teeth on the first one-way drive gear (13). The plurality of second permanent magnets (181) are respectively installed on the two engaging inclined surfaces of the driving teeth on the first toothed plate (18). The driving teeth have an isosceles structure, and the outward faces of the plurality of first permanent magnets (131) and the plurality of second permanent magnets (181) have the same magnetic pole.

6. The automatic ball feeder for a ball mill according to claim 5, characterized in that: The magnetic strength ratio of the first permanent magnet (131) to the second permanent magnet (181) is 1:

1.

7. The automatic ball feeder for a ball mill according to claim 6, characterized in that: The inclination angles of the two engaging inclined surfaces of the driving teeth are both 32° to 37°.

8. The automatic ball feeder for a ball mill according to claim 1, characterized in that: The lower left end of the ball storage chamber (2) is fixedly provided with a movable plate (10).

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