Automatic steel ball feeding machine for ball mill

Abstract

The invention discloses an automatic steel ball feeding machine for a ball mill, which comprises a ball storage unit, a push plate feeding machine and an inclined L-shaped conveying groove, the device further comprises an overload protection unit, the overload protection unit can automatically discharge excessive steel balls added into the ball storage chamber and store the steel balls additionally, and after a certain number of steel balls in the ball storage chamber are discharged from the discharging opening, the additionally stored steel balls can be automatically added into the ball storage chamber. According to the automatic ball feeding machine, the overload protection unit is arranged, overload discharging can be automatically conducted, unloaded steel balls are automatically added into the ball storage chamber through the height change of the ball storage chamber in the working process, overload of the ball storage chamber can be effectively avoided, and meanwhile unnecessary troubles caused by the fact that additionally stored steel balls are manually added into the ball storage chamber again are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of automatic ball adding machines, in particular to an automatic steel ball adding machine for a ball mill. Background Art

[0002] A ball mill is a pulverizing machine that has a hollow cylinder filled with heavy steel balls (grinding bodies) for grinding materials. The working principle of a ball mill mainly relies on the impact and friction of the steel balls in the cylinder. When the cylinder rotates, the grinding bodies (steel balls) added to the cylinder by the automatic ball adding machine impact and grind the materials in the cylinder due to inertia and centrifugal force. The materials are fed into the mill evenly through the hollow feed shaft spiral from the feeding device, and after grinding, they are discharged through the discharge grate.

[0003] The existing automatic steel ball feeding machine used in conjunction with the ball mill mainly includes a ball storage chamber with a vibration motor, a push plate loading machine and an inclined conveying trough for guiding the steel balls. The vibration of the vibration motor causes the steel balls in the ball storage chamber to fall onto the push plate loading machine, and then the push plate loading machine pushes the steel balls into the conveying trough. Since the conveying trough is inclined, the steel balls in the conveying trough move along the conveying trough path under the action of their own gravity and finally enter the cylinder of the ball mill.

[0004] Before each control of the ball mill to grind the material, it is necessary to add a sufficient amount of steel balls to the automatic ball adding machine to ensure the orderly progress of the subsequent grinding. Generally, a grab bucket is used to grab the steel balls in the steel ball pool and send them to the ball storage chamber. In actual addition, the steel balls in the ball storage chamber are often overloaded due to the inability to accurately control the last amount of steel balls grabbed. The overload of steel balls will cause the vibration of the ball storage chamber to be not obvious enough, and the internal steel balls are prone to blockage and jamming, affecting the feeding of steel balls. At the same time, it is also easy to cause the vibration motor to overload. Being in an overloaded state for a long time may cause the vibration motor to overheat or even burn out, thereby affecting the normal operation of the entire automatic ball adding machine. Therefore, the present application provides an automatic steel ball adding machine for a ball mill to meet the needs. Summary of the invention

[0005] The purpose of the present application is to provide an automatic steel ball adding machine for a ball mill, which is used to solve the technical problem that the existing automatic steel ball adding machine is prone to overload when adding materials.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions: an automatic steel ball feeding machine for a ball mill, comprising a ball storage unit, a push plate feeder and an inclined L-shaped conveying trough; The ball storage unit comprises a ball storage chamber with an opening at the upper end, a material discharge opening is arranged on the left end of the ball storage chamber, the ball storage chamber is located in the inner cavity of the shell, the bottom of the ball storage chamber is connected to the shell through a vibration spring, a vibration motor is installed at the bottom of the ball storage chamber, and the left end and the upper end of the shell are both opened; The material unloading opening is connected with the material receiving opening of the push plate loading machine; The L-shaped conveying trough is arranged obliquely downward, the feeding end of the L-shaped conveying trough is connected with the discharging end of the push plate feeder, and the discharging end of the L-shaped conveying trough is located above the feeding port of the ball mill; A single feeder is provided at the discharge end of the L-shaped conveying trough, and the single feeder includes two plates that are slidably arranged to penetrate the L-shaped conveying trough, and the two plates are respectively connected to the output ends of the corresponding driving cylinders, and the two driving cylinders are both installed on the outer wall of the L-shaped conveying trough; It also includes an overload protection unit, which can automatically discharge the excessive steel balls added in the ball storage chamber and store them separately, and when a certain number of steel balls in the ball storage chamber are discharged from the discharge opening, the separately stored steel balls can be automatically added to the ball storage chamber.

[0007] As a preferred implementation in this embodiment, the overload protection unit includes a discharge notch provided at the upper right end of the ball storage chamber, a receiving trough fixedly mounted on the inner cavity wall of the shell and located below the discharge notch, a discharge opening provided on the right side wall of the ball storage chamber, a feed plate provided in the inner cavity of the discharge opening rotated by a first rotating shaft, and a second one-way driving gear provided on the outer wall of the ball storage chamber rotated by a second rotating shaft; The inner cavity of the material receiving trough is inclinedly provided with a material guiding inclined plate, and the bottom plate of the material receiving trough is inclinedly provided and the material guiding inclined plates are arranged in an eight-shaped shape, a baffle is slidably provided on the bottom plate, and the lower end of the baffle is connected to the material receiving trough through a connecting spring, and the lower end of the baffle is connected to a winding wheel installed on a third rotating shaft through a first pull rope, and the third rotating shaft is rotatably provided at the bottom of the material receiving trough, and a first one-way driving gear is installed on the end of the third rotating shaft, and a first tooth plate is provided on the upper left side of the first one-way driving gear, and the first tooth plate is fixedly provided on the outer wall of the ball storage chamber; A discharge port is provided on the side wall of the receiving trough close to the discharge opening; A second tooth plate is arranged on the upper left side of the second one-way drive gear, and the second tooth plate is mounted on the inner wall of the outer shell, 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 a second pull rope, and an arc-shaped opening adapted to the movement of the mounting column is arranged on the outer wall of the ball storage chamber, the second pull rope is sleeved on the guide wheel group, the guide wheel group is located above the arc-shaped opening, and the second one-way drive gear is located below the guide wheel group.

[0008] As a preferred implementation in this embodiment, it also includes a mitigation unit for hindering and allowing the feed plate to slowly return to its original position.

[0009] As a preferred implementation in this embodiment, the mitigation unit comprises a hollow tube fixedly mounted on the periphery of the second rotating shaft, the inner cavity of the hollow tube is relatively provided with two mounting rings, a cylinder is rotatably arranged between the two mounting rings via the mounting shaft, and the periphery of the cylinder is provided with arc blocks with increasingly larger deflection angles; The outer wall of the cylinder is in close contact with the elastic sleeve fixedly mounted on the outer wall of the second rotating shaft; Two first stoppers are fixed on the installation shaft, and a second stopper is arranged on the inner wall of the corresponding installation ring.

[0010] As a preferred implementation manner in this embodiment, it also includes a contactless driving unit for controlling the first tooth plate to contactlessly drive the first one-way driving gear to rotate and for controlling the second tooth plate to contactlessly drive the second one-way driving gear to rotate.

[0011] As a preferred implementation manner in this embodiment, the first tooth plate and the second tooth plate have the same structure, the first unidirectional drive gear and the second unidirectional drive gear have the same structure, the contactless drive unit includes multiple first permanent magnets and multiple second permanent magnets, the multiple first permanent magnets are respectively installed on the two meshing inclined surfaces of the drive teeth on the corresponding first unidirectional drive gear, and the multiple second permanent magnets are respectively installed on the two meshing inclined surfaces of the drive teeth on the corresponding first tooth plate, the drive teeth are an isosceles structure, and the outward surface magnetic poles of the multiple first permanent magnets and the multiple second permanent magnets are the same.

[0012] As a preferred implementation manner in this embodiment, the magnetic strength ratio of the first permanent magnet and the second permanent magnet is:.

[0013] As a preferred implementation in this embodiment, the inclination angles of the two meshing inclined surfaces on the driving tooth are both 32° to 37°.

[0014] As a preferred implementation manner in this embodiment, a movable plate is fixedly installed at the lower left end of the ball storage chamber.

[0015] In summary, the technical effects and advantages of the present invention are as follows: The invention has a reasonable structure. The automatic ball adding machine is provided with an overload protection unit, which can automatically perform overload unloading, and automatically add the unloaded steel balls into the ball storage chamber through the height change of the ball storage chamber during operation, which can effectively avoid the overload of the ball storage chamber, and also avoid the unnecessary trouble caused by manually adding the separately stored steel balls into the ball storage chamber again; In the present invention, a deceleration unit is provided to reduce the reset speed of the feed plate, which is conducive to passing over the baffle plate and entering the ball storage chamber without colliding with the feed plate. In the present invention, the contactless driving unit can achieve contactless driving between the tooth plate and the gear, thereby avoiding the phenomenon of tooth collapse and also being beneficial to improving the vibration strength of the ball storage chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall and partial enlarged structure of the present invention; Figure 2 for Figure 1 Schematic diagram of the split structure of the middle ball storage chamber and the outer shell; Figure 3 for Figure 2 Schematic diagram of the structure of the central ball storage room from above; Figure 4 for Figure 2 Schematic diagram of the partial cross-section structure of the middle ball storage chamber; Figure 5 for Figure 4 A schematic diagram of the partially enlarged structure at center A; Figure 6 for Figure 4 Schematic diagram of the connection structure between the middle feed plate and the second one-way drive gear; Figure 7 for Figure 6 Schematic diagram of partial decomposition and cross-section structure of the middle mitigation unit; Figure 8 for Figure 6 Schematic diagram of the partial front view structure of the middle mitigation unit.

[0018] In the figure: 1, shell; 2, ball storage chamber; 3, unloading opening; 4, push plate loading machine; 5, L-shaped conveying trough; 6, driving cylinder; 7, plate body; 8, vibration spring; 9, vibration motor; 10, movable plate; 11, material receiving trough; 12, third rotating shaft; 13, first one-way driving gear; 131, first permanent magnet; 14, first pull rope; 15, guide inclined plate; 16, baffle; 17, connecting spring; 18, first tooth plate; 181, second permanent magnet; 19, feeding plate; 20, first rotating shaft; 21, mounting column; 22, second pull rope; 23, second one-way driving gear; 24, second tooth plate; 25, guide wheel group; 26, second rotating shaft; 27, hollow tube; 28, mounting ring; 29, cylinder; 30, first stopper; 31, arc block; 32, elastic sleeve; 33, unloading gap; 34, second stopper. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example: Reference Figure 1-3 The steel ball automatic feeding machine for a ball mill shown in the figure comprises a ball storage unit, a push plate feeder 4 and an inclined L-shaped conveying trough 5; The ball storage unit comprises a ball storage chamber 2 with an opening at the upper end, a material discharge opening 3 is arranged on the left 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 to 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 opened; The material discharge opening 3 is connected with the material receiving opening of the push plate feeder 4; The L-shaped conveying trough 5 is arranged obliquely downward, and the feeding end of the L-shaped conveying trough 5 is connected with the discharging end of the push plate feeder 4, and the discharging end of the L-shaped conveying trough 5 is located above the feeding port of the ball mill; A single feeder is provided at the discharge end of the L-shaped conveying trough 5, and the single feeder includes two plates 7 that are slidably arranged to penetrate the L-shaped conveying trough 5, and the two plates 7 are respectively connected to the output ends of the corresponding driving cylinders 6, and the two driving cylinders 6 are both installed on the outer wall of the L-shaped conveying trough 5; It also includes an overload protection unit, which can automatically discharge the excessive steel balls added into the ball storage chamber 2 and store them separately. 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 into the ball storage chamber 2.

[0021] By setting up an overload protection unit, when adding balls into the ball storage chamber 2, the steel balls added in excess in the ball storage chamber 2 can be automatically discharged and stored separately, and after a certain number of steel balls in the ball storage chamber 2 are discharged from the discharge opening 3 (generally when the steel balls in the ball storage chamber 2 are almost gone), the steel balls stored separately can be automatically added to the ball storage chamber 2, which can effectively prevent the ball storage chamber 2 from being overloaded, and also avoid manually adding the steel balls stored separately into the ball storage chamber 2 again to cause unnecessary trouble.

[0022] It should be noted that, first, when the ball adding machine is in use, it pushes the steel ball into the L-shaped conveying trough 5 through the plate pushing feeder 4. Since the L-shaped conveying trough 5 is inclined, the steel ball entering the L-shaped conveying trough 5 moves along the L-shaped path under the action of its own gravity and finally contacts with the plate body 7. In order to ensure accurate control of the ball adding amount, a single ball adding is adopted. First, the first driving cylinder 6 close to the steel ball is controlled to drive the first plate body 7 to move outward. Without the obstruction of the first plate body 7, the steel ball will contact the second plate body 7, and then the first driving cylinder 6 is controlled to drive the plate body 7 to return to its original position, and the steel balls are added. Separated, and then control the second driving cylinder 6 to move the second plate 7 to move outward, removing the obstruction to the steel balls. At this time, the steel balls move by their own gravity and finally enter the ball mill, and then control the second driving cylinder 6 to drive the second plate 7 to return to its original position; second, the L-shaped conveying trough 5 includes a first straight line segment and a second straight line segment arranged in an L shape, the first straight line segment is arranged obliquely downward relative to the discharge end of the push plate feeder 4, and the second straight line segment away from the push plate feeder 4 is arranged obliquely downward relative to the first straight line segment, and its arrangement is conducive to the movement of the steel balls in the L-shaped conveying trough 5 by their own gravity.

[0023] As a preferred implementation in this embodiment, 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 trough 11 fixedly mounted on the inner cavity wall of the housing 1 and located below the discharge notch 33, a discharge opening provided on the right side wall of the ball storage chamber 2, a feed plate 19 provided in the inner cavity of the discharge opening rotatably arranged by a first rotating shaft 20, and a second one-way driving gear 23 provided on the outer wall of the ball storage chamber 2 rotatably arranged by a second rotating shaft 26; The inner cavity of the material receiving trough 11 is tiltedly provided with a material guiding inclined plate 15, and the bottom plate of the material receiving trough 11 is tiltedly provided and the material guiding inclined plates 15 are arranged in an eight-shaped shape, a baffle plate 16 is slidably provided on the bottom plate, and the lower end of the baffle plate 16 is connected to the material receiving trough 11 through a connecting spring 17, and the lower end of the baffle plate 16 is connected to a winding wheel installed on the third rotating shaft 12 through a first pull rope 14, and the third rotating shaft 12 is rotatably provided at the bottom of the material receiving trough 11, and a first one-way driving gear 13 is installed on the end of the third rotating shaft 12, and a first tooth plate 18 is provided on the upper left side of the first one-way driving gear 13, and the first tooth plate 18 is fixedly provided on the outer wall of the ball storage chamber 2; A discharge port is provided on the side wall of the receiving trough 11 near the discharge opening; A second tooth plate 24 is arranged on the upper left side of the second one-way drive gear 23, and the second tooth plate 24 is installed on the inner wall of the outer shell 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 arranged on the outer wall of the ball storage chamber 2. The second pull rope 22 is sleeved on the guide wheel group 25. The guide wheel group 25 is located above the arc-shaped opening, and the second one-way drive gear 23 is located below the guide wheel group 25.

[0024] When the grab bucket is used to add steel balls into the ball storage chamber 2, as the steel balls are added into the ball storage chamber 2, the ball storage chamber 2 moves downward and the vibration spring 8 is compressed. As the ball storage chamber 2 moves downward, its first tooth plate 18 and the second tooth plate 24 move to below the first one-way drive gear 13 and the second one-way drive gear 23 respectively (in this process, the first tooth plate 18 and the first one-way drive gear 13 or the second tooth plate 24 and the second one-way drive gear 23 will be toothed and separated. During the toothed process of downward movement, since the first one-way drive gear 13 and the second one-way drive gear 23 are one-way drive structures, they cannot respectively drive the third rotating shaft 12 and the second rotating shaft 26 to rotate). As the steel balls continue to be added, the excess steel balls (i.e., the overloaded steel balls) ) will be automatically discharged from the discharge gap 33 to the receiving trough 11, and the steel balls in the receiving trough 11 are blocked by the baffle 16 (at this time, the operator stops adding balls). During operation, as the steel balls in the ball storage chamber 2 are continuously reduced, the ball storage chamber 2 slowly rises. When only a bottom layer (or a small amount) of steel balls are left in the ball storage chamber 2, the first tooth plate 18 and the second tooth plate 24 are respectively engaged 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 reel in and make the baffle 16 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 reel in, and the reeling of the second pull rope 22 can drive the feeding The plate 19 performs a circular motion around the first rotating shaft 20, thereby opening the discharge opening. When the baffle 16 is released from the obstruction of the steel balls in the docking trough 11, the feed plate 19 has rotated to a certain angle (the rotation angle is 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 increase in weight. At this time, the first tooth plate 18 and the second tooth 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 the baffle 16 will move upward to block the steel balls. As for the downward movement of the second tooth plate 24, the baffle 16 is pulled upward by gravity and the second pull rope 22 The second rotating shaft 26 is driven to rotate in the opposite direction, so that the baffle 16 can be restored to its original position. After the baffle 16 forms a block for the steel ball, the angle between the baffle 16 and the vertically arranged discharge opening is not less than 55°, which can prevent the steel ball from colliding with the feed plate 19 during the unloading process and causing the feed plate 19 to be deformed and damaged (when the baffle 16 moves upward to block, some steel balls at the bottom of the receiving trough 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, after the baffle 16 forms a block for the steel ball, the angle between the baffle 16 and the vertically arranged discharge opening is not less than 55°). Finally, the first tooth plate 18 and the second tooth 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 in the ball storage chamber 2 decreases, the ball storage chamber 2 will move upward again, and the first tooth plate 18 and the second tooth plate 24 will be respectively engaged with the first one-way drive gear 13 and the second one-way drive gear 23, and the steel balls in the receiving trough 11 will be added to the ball storage chamber 2 again, and this process will be repeated until all the steel balls in the receiving trough 11 are added to 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 tooth plate 18 and the second tooth plate 24 will move to the top of the first one-way drive gear 13 and the second one-way drive gear 23, respectively. The overload protection unit can automatically perform overload unloading, and automatically add the unloaded steel balls to the ball storage chamber 2 through the height change of the ball storage chamber 2 during operation.

[0025] It should be noted that, first, in the process of adding balls to the ball storage chamber 2, the discharge gap 33 is always located above the receiving trough 11, which is conducive to the overloaded steel balls entering the receiving trough 11 through the discharge gap 33; second, its baffle 16 is arranged in the middle of the bottom plate of the receiving trough 11, which can avoid the excessive movement speed of the steel balls in the receiving trough 11 and the formation of a more intense collision with the rising baffle 16, and is conducive to the steel balls that cross the rising baffle 16 to enter the ball storage chamber 2 after the baffle 16 blocks the steel balls and the angle between the baffle 16 and the vertically arranged discharge opening is not less than 55°; third, the discharge gap 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 from the discharge gap 33; fourth, an L-shaped blocking step is arranged at the bottom of the feed plate 19, and a blocking strip adapted to the L-shaped blocking step is arranged at the bottom of the inner cavity of the discharge opening.

[0026] As a preferred implementation in this embodiment, a mitigation unit is further included to hinder and enable the feed plate 19 to slowly return to its original position.

[0027] The purpose of setting the deceleration unit is to reduce the reset speed of the feed plate 19, which is conducive to passing over the baffle 16 and entering the ball storage chamber 2 without colliding with the feed plate 19.

[0028] As a preferred implementation in this embodiment, Figure 6-8 As shown, the mitigation unit includes a hollow tube 27 fixedly mounted on the periphery of the second rotating shaft 26, and two mounting rings 28 are arranged opposite to each other in the inner cavity of the hollow tube 27, and a cylinder 29 is arranged between the two mounting rings 28 via the mounting shaft, and an arc block 31 with an increasing deflection angle is arranged on the periphery of the cylinder 29; The outer wall of the cylinder 29 is in close contact with the elastic sleeve 32 fixedly mounted on the outer wall of the second rotating shaft 26; Two first stoppers 30 are fixed on the mounting shaft, and a second stopper 34 is provided on the inner wall of the corresponding mounting ring 28 .

[0029] When the second tooth plate 24 moves upward, the second one-way driving gear 23 drives the second rotating shaft 26 to rotate clockwise. 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, so that the first stopper 30 on the right side (reference Figure 7 ) contacts with the second stopper 34 to form a block. At this time, the extrusion 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 tooth plate 24 moves downward, the second rotating shaft 26 rotates counterclockwise and drives the cylinder 29 to rotate clockwise, so that the extrusion force between the arc block 31 and the elastic sleeve 32 gradually increases. When it is the maximum, the first stopper 30 on the far side forms a block with the second stopper 34. At this time, the resistance to the restoring movement of the baffle 16 becomes larger, and it is slowly reset, 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).

[0030] As a preferred implementation in this embodiment, it also includes a contactless driving unit for controlling the first tooth plate 18 to contactlessly drive the first one-way driving gear 13 to rotate and for controlling the second tooth plate 24 to contactlessly drive the second one-way driving gear 23 to rotate.

[0031] Since the ball storage chamber 2 utilizes the vibration motor 9 to perform the material unloading operation when working, the tooth connection between the tooth plate and the gear is prone to tooth breakage due to vibration, which will also affect the vibration effect of the ball storage chamber 2.

[0032] As a preferred implementation in this embodiment, Figure 5 As shown, the first tooth plate 18 has the same structure as the second tooth plate 24, the first one-way drive gear 13 has the same structure as the second one-way drive gear 23, the contactless drive 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 mounted on the two meshing inclined surfaces of the drive teeth on the corresponding first one-way drive gear 13, the plurality of 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 are an isosceles structure, and the outward surface magnetic poles of the plurality of first permanent magnets 131 and the plurality of the plurality of first permanent magnets 131 are the same.

[0033] By arranging the first permanent magnet 131 and the second permanent magnet 181 on the first tooth plate 18, the second tooth plate 24, the first one-way drive gear 13 and the second one-way drive gear 23, the gears are driven to rotate by the repulsion of magnetic poles, so that the tooth plate and the gears can be driven without contact, which can avoid the phenomenon of tooth breakage and is also beneficial to improving the vibration strength of the ball storage chamber 2.

[0034] It should be noted that the first tooth plate 18 , the second tooth plate 24 , the first one-way driving gear 13 and the second one-way driving gear 23 are all made of magnetic isolation materials to minimize magnetic field interference.

[0035] As a preferred implementation in this embodiment, the magnetic strength ratio of the first permanent magnet 131 and the second permanent magnet 181 is 1:1.

[0036] When the magnetic force intensity ratio is 1:1, the repulsive force between the tooth plate and the gear will reach a relatively stable equilibrium state. This equilibrium state helps to reduce the extra friction and energy loss caused by uneven magnetic force and improve transmission efficiency.

[0037] As a preferred implementation in this embodiment, the inclination angles of the two meshing inclined surfaces on the driving teeth are both 32° to 37°.

[0038] In this tilt angle range, the repulsive force between the permanent magnets can be more effectively decomposed into tangential components, that is, the tangential repulsive force is maximized, which is the main source of power for driving the gear to rotate. The larger the tangential component, the higher the transmission efficiency is usually. At the same time, the tilt angle in this range helps to control the gap between the tooth plate and the gear, avoiding the decrease in transmission efficiency due to excessive gap and increasing unnecessary friction and wear due to too small gap.

[0039] As a preferred implementation in this embodiment, Figure 2 As shown, a movable plate 10 is fixedly installed at the lower left end of the ball storage chamber 2.

[0040] The movable plate 10 can move with the ball storage chamber 2. The movable plate 10 closes and blocks the gap between the bottom of the ball storage chamber 2 and the bottom of the inner cavity of the shell 1 to prevent the steel ball from entering the gap and affecting the downward movement of the ball storage chamber 2.

[0041] Finally, it should be noted that the above 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 aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic steel ball adding machine for a ball mill, characterized in that: It comprises a ball storage unit, a plate pusher (4) and an L-shaped conveying trough (5) arranged obliquely; The ball storage unit comprises a ball storage chamber (2) with an opening at the upper end, a material discharge opening (3) is arranged on the left 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 to the shell (1) via 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 arranged with openings; The material discharge opening (3) is connected with the material receiving opening of the push plate loading machine (4); The L-shaped conveying trough (5) is arranged obliquely downward, the feeding end of the L-shaped conveying trough (5) is connected to the discharging end of the push plate feeder (4), and the discharging end of the L-shaped conveying trough (5) is located above the feeding port of the ball mill; A single feeder is provided at the discharge end of the L-shaped conveying trough (5), the single feeder comprising two plates (7) slidably penetrating the L-shaped conveying trough (5), and the two plates (7) are respectively connected to the output ends of the corresponding drive cylinders (6), and the two drive cylinders (6) are both mounted on the outer wall of the L-shaped conveying trough (5); It also includes an overload protection unit, which can automatically discharge the excessive steel balls added into the ball storage chamber (2) and store them separately, and when 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 into the ball storage chamber (2).

2. The automatic steel ball adding machine for ball mill according to claim 1, characterized in that: The overload protection unit comprises a discharge notch (33) provided at the upper end of the right side wall of the ball storage chamber (2), a receiving trough (11) fixedly mounted on the inner wall of the housing (1) and located below the discharge notch (33), a discharge opening provided on the right side wall of the ball storage chamber (2), a feed plate (19) provided in the inner cavity of the discharge opening and rotatable by a first rotating shaft (20), and a second one-way driving gear (23) provided on the outer wall of the ball storage chamber (2) and rotatable by a second rotating shaft (26); The inner cavity of the material receiving trough (11) is provided with a material guiding inclined plate (15) at an angle, and the bottom plate of the material receiving trough (11) is provided with a material guiding inclined plate (15) arranged in an eight-shaped shape, a baffle plate (16) is provided on the bottom plate to slide through, and the lower end of the baffle plate (16) is connected to the material receiving trough (11) through a connecting spring (17), and the lower end of the baffle plate (16) is connected to a winding wheel installed on a third rotating shaft (12) through a first pull rope (14), and the third rotating shaft (12) is rotatably provided at the bottom of the material receiving trough (11), and a first one-way driving gear (13) is installed on the end of the third rotating shaft (12), and a first tooth plate (18) is provided on the upper left side of the first one-way driving gear (13), and the first tooth plate (18) is fixedly provided on the outer wall of the ball storage chamber (2); The side wall of the receiving trough (11) close to the discharge opening is provided with a discharge port; A second tooth plate (24) is provided on the upper left side of the second one-way drive gear (23), and the second tooth plate (24) is mounted on the inner wall of the housing (1). The winding wheel on the second rotating shaft (26) is connected to a mounting column (21) fixed on the outer wall of the side end of the feed plate (19) through a 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 a guide wheel group (25), and the guide wheel group (25) is located above the arc-shaped opening. The second one-way drive gear (23) is located below the guide wheel group (25).

3. The automatic steel ball adding machine for ball mill according to claim 2, characterized in that: It also comprises a deceleration unit, which is used to hinder and allow the feed plate (19) to slowly return to its original position.

4. The automatic steel ball adding machine for ball mill according to claim 3, characterized in that: The mitigation unit comprises a hollow tube (27) fixedly mounted on the periphery of the second rotating shaft (26); the inner cavity of the hollow tube (27) is provided with two mounting rings (28) facing each other; a cylinder (29) is rotatably arranged between the two mounting rings (28) via the mounting shaft; and an arc-shaped block (31) with an increasing deflection angle is arranged on the periphery of the cylinder (29); The outer wall of the cylinder (29) is in close contact with the elastic sleeve (32) fixedly mounted on the outer wall of the second rotating shaft (26); Two first stoppers (30) are fixed on the installation shaft, and a second stopper (34) is provided on the inner wall of the corresponding installation ring (28).

5. The automatic steel ball adding machine for ball mill according to claim 2, characterized in that: It also includes a contactless driving unit, which is used to control the first tooth plate (18) to contactlessly drive the first one-way driving gear (13) to rotate, and is used to control the second tooth plate (24) to contactlessly drive the second one-way driving gear (23) to rotate.

6. The automatic steel ball adding machine for ball mill according to claim 5, characterized in that: 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, the contactless drive unit comprises a plurality of first permanent magnets (131) and a plurality of second permanent magnets (181), the plurality of first permanent magnets (131) are respectively mounted on two meshing inclined surfaces of drive teeth on the corresponding first one-way drive gear (13), the plurality of second permanent magnets (181) are respectively mounted on two meshing inclined surfaces of drive teeth on the corresponding first tooth plate (18), the drive teeth are of isosceles structure, and the outwardly facing magnetic poles of the plurality of first permanent magnets (131) and the plurality of second permanent magnets (181) are the same.

7. The automatic steel ball adding machine for ball mill according to claim 6, characterized in that: The magnetic strength ratio between the first permanent magnet (131) and the second permanent magnet (181) is 1:

1.

8. The automatic steel ball adding machine for ball mill according to claim 7, characterized in that: The inclination angles of the two meshing inclined surfaces on the driving teeth are both 32° to 37°.

9. The automatic steel ball adding machine for ball mill according to claim 2, characterized in that: A movable plate (10) is fixedly mounted on the lower left end of the ball storage chamber (2).

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