Ball mill ball feeding device

Abstract

The invention discloses a ball mill ball delivery device, which relates to the technical field of ball mills. It includes a receiving hopper and a conduit, and a material selection device is arranged on the conduit, and the material selection device divides the conduit into a first conduit and a second conduit; the material selection device is a three-way structure, and one end of the first conduit is fixedly connected to the first interface of the material selection device; one end of the second conduit is fixedly connected to the second interface of the material selection device; the third interface of the material selection device is fixedly connected to the discharge pipe; an electric rotating mechanism is arranged in the material selection device, and the electric rotating mechanism can control the ball to pass through the second interface of the material selection device or the third interface of the material selection device; the material selection device and the conduits at both ends are tilted and fixedly arranged in the ball mill. It can accurately select the drop point to prevent the ball from gathering too much, and can also prevent the ball from having too much impact on the ball mill, thereby reducing noise. The invention has reasonable design, ingenious structure, low cost, convenient operation, good stability, and is easy to assemble and overhaul.

Description

Technical Field

[0001] The invention relates to the technical field of ball mills required for ceramic processing, in particular to a ball mill ball stone feeding device. Background Art

[0002] When the existing ball mill automatically adds ball abrasives, it controls a conveyor belt to rotate by controlling the motor. A storage hopper is arranged above the conveyor belt. Balls are placed in the storage hopper. The balls are moved into the receiving hopper through the conveyor belt. The receiving hopper is connected to a conduit. One end of the conduit extends into the ball mill. The balls roll into the ball mill through the conduit. Since the balls fall into the conduit at a high speed, the impact equipment produces a large noise, which can easily cause equipment damage or ball cracking, and it is also easy to cause the conduit to fall off, causing safety accidents; in addition, since the conduit falls into the fixed point, the balls with smaller diameters fall at the same point in the ball mill and are easy to agglomerate when encountering mud materials, resulting in unsatisfactory grinding effect. Summary of the invention

[0003] In order to solve the above problems, the present invention adopts the following technical solutions:

[0004] A ball mill ball feeding device comprises a storage hopper, a conveyor belt, a receiving hopper and a conduit. The storage hopper is arranged above the conveyor belt, and the ball is placed in the storage hopper. The ball moves into the receiving hopper through the conveyor belt, and the receiving hopper is connected to the conduit.

[0005] The conduit is provided with a material selection device, which divides the conduit into a first conduit and a second conduit;

[0006] The material selection device is a three-way structure, one end of the first conduit is fixedly connected to the first interface of the material selection device; one end of the second conduit is fixedly connected to the second interface of the material selection device; the third interface of the material selection device is fixedly connected to the discharge pipe;

[0007] The material selection device is provided with an electric rotating mechanism, which can control the balls to pass through the second interface or the third interface of the material selection device; such a design can realize the falling point control of the balls, and when necessary, the corresponding interface is opened to make the balls fall, which can well prevent the balls from agglomerating and piling up, effectively disperse the balls, and improve the grinding efficiency.

[0008] The material selection device and the conduits at both ends are fixedly arranged in the ball mill at an angle. The inclined setting is mainly for horizontal ball mills, which have a horizontal opening, one end for feeding and the other end for discharging. The material selection device and the conduit are inserted into the feed port and maintained at a certain angle, so that the balls can slowly roll into the ball mill to avoid impact caused by too fast movement of the balls.

[0009] Preferably, there are five material selection devices, each of which is connected end to end through conduits at both ends to form a long strip structure, and the material selection device and the conduit are extended into the inner cavity of the ball mill through a fixed bracket arranged outside the ball mill; wherein the first conduit of the outermost material selection device is connected to the receiving hopper. The fixed bracket outside the ball mill can be welded with angle steel, which forms a stable bracket with an inverted U-shaped structure with the material selection device and the conduit, and the material selection device and the conduit are suspended in the inner cavity of the ball mill without contacting the ball mill. Such a structure does not require changing the original structure, but only requires adding a bracket to the original structure, thereby reducing the design and assembly costs.

[0010] Preferably, the material selection device comprises an outer shell, which is a hollow cylindrical structure and is composed of two detachable arc-shaped outer shells;

[0011] The outer shell is provided with an inner cavity, and conduit fixing plates are provided on both sides of the inner cavity, and threaded fixing holes are opened on the conduit fixing plates; both ends of the conduits are provided with external threads, and the conduits can be threadedly connected with the threaded fixing holes, so that it is convenient to disassemble and assemble, and the length of the feeding device can be flexibly extended or shortened according to the on-site conditions, so as to adapt to ball mills of different specifications.

[0012] The side wall of the outer shell is provided with a discharge hole;

[0013] A first bearing and a second bearing are coaxially fixedly disposed in the inner cavity, and a rotating cylinder is passed through the first bearing and the second bearing;

[0014] A gear ring is fixedly arranged on the outer periphery of one end of the rotating drum; a drop hole is opened on the side wall of the rotating drum; the diameter of the drop hole should be larger than the maximum ball diameter, so that the ball can fall smoothly.

[0015] The drop hole corresponds to the discharge hole, and the discharge pipe is fixedly arranged on the discharge hole; the inner hole diameters of the drop hole, the discharge hole and the discharge pipe are all larger than the diameter of the largest ball stone. When the ball stone passes through the rotating drum and falls into the drop hole, it can smoothly fall into the ball mill from the discharge hole and the discharge pipe.

[0016] A rotating motor is fixedly arranged on the outer ring of the first bearing, and a worm is fixedly arranged on the output shaft of the rotating motor, and the worm is meshed with the gear ring; for the convenience of control, the rotating motor used in this embodiment is a DC reduction motor, and a reduction motor with a 90-degree output shaft. There are many such motors on the market, the products are mature, small in size, simple to control and low in cost.

[0017] The rotating drum is a tubular structure, and its inner diameter is equal to the inner diameter of the conduit, so that the balls can roll in the tube easily and the resistance caused by different apertures can be reduced.

[0018] Preferably, the discharge pipe is an arc-shaped curved pipe structure, which matches the inner wall of the ball mill. The arc-shaped curved pipe is arranged along the inner wall of the ball mill, so that when the balls fall in, they can roll down along the inner wall of the ball mill, and will not directly impact the inner wall of the ball mill by free fall, causing equipment damage or ball explosion.

[0019] Preferably, limit stop rings are fixedly arranged on both sides of the inner cavity, and the limit stop rings are located on both sides of the rotating drum but do not contact the rotating drum. The limit stop ring is an annular structure. This embodiment adopts a structure in which a fixed wing plate is added to the annular structure to reduce weight. Of course, the entire annular structure does not affect the realization of its function. The limit stop ring is mainly used to prevent the rotation of the rotating drum from being hindered due to poor matching of the catheter when installing the catheter. The distance between the limit stop ring and the rotating drum should be controlled within 1 mm to reduce the rolling resistance of the ball stone.

[0020] Preferably, the limit stop ring is welded to the inner wall of the outer shell. During normal assembly, the limit stop ring is subjected to relatively large force, and the welding method is the most stable, and it can also avoid the increase of assembly difficulty caused by too many parts.

[0021] Preferably, a position detection sensor is fixedly arranged on one of the limit stop rings, and a positioning block is arranged on the rotating drum, and the positioning block matches the position detection sensor. Through the cooperation between the position detection sensor and the positioning block, the rotation position of the rotating drum can be accurately known, so as to control the movement of the ball stone.

[0022] Preferably, the positioning block is a permanent magnet;

[0023] The position detection sensor is a Hall sensor, which is a commonly used, relatively mature and stable position detection method. Using such a positioning method can reduce the number of tests and reduce the debugging cost.

[0024] Preferably, both ends of the first conduit and the second conduit are provided with external threads, which can be threadedly connected to the material selection device.

[0025] Preferably, a baffle is provided on one side of the drop hole. The baffle should be arranged on the lower side of the inclined rotating drum, preferably on the lower side edge of the drop hole, so that the ball stone can be well blocked from moving backwards and falling into the drop hole.

[0026] The present invention can accurately select the material drop point by adding a material selection device to the conduit to prevent excessive accumulation of balls and stones. By changing the feeding structure and the angle between the material selection device and the conduit and the ball mill, the balls and stones can be prevented from having too much impact on the ball mill and the noise can be reduced. The present invention has reasonable design, ingenious structure, low cost, convenient operation, good stability, and is easy to assemble and overhaul. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment provided by the present invention;

[0028] Figure 2 is a partial cross-sectional view of an embodiment provided by the present invention;

[0029] Figure 3 is a cross-sectional view of a material selection device and a conduit in an embodiment provided by the present invention;

[0030] Figure 4 yes Figure 3 The main view of

[0031] Figure 5 is an exploded schematic diagram of a material selection device in an embodiment provided by the present invention;

[0032] Figure 6 It is an internal structure diagram of the material selection device in the embodiment provided by the present invention;

[0033] Figure 7 yes Figure 6 The main view of

[0034] Figure 8 yes Figure 6 Left view of

[0035] Fig. 9 yes Figure 6 A top view of

[0036] Fig.10 2 is a cross-sectional view of a rotating drum in an embodiment provided by the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the implementation mode of the present application clearer, the following will be combined with the implementation mode of the present application. Figures 1 to 10, the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but only represents the selected embodiments of the present application. In the description of the present application, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] like Figure 1 As shown, a ball mill ball feeding device includes a storage hopper, a conveyor belt 1, a receiving hopper 2 and a conduit. Similar to the prior art, a storage hopper (not shown) is arranged above the conveyor belt 1. Balls 6 are placed in the storage hopper. The ball 6 moves into the receiving hopper 2 through the conveyor belt. The receiving hopper 2 is connected to the conduit. The difference is that:

[0042] A material selection device 4 is provided on the conduit, and the material selection device 4 divides the conduit into a first conduit 3 and a second conduit 5. The material selection device 4 is a three-way structure, and one end of the first conduit 3 is fixedly connected to the first interface of the material selection device 4. One end of the second conduit 5 is fixedly connected to the second interface of the material selection device 4. The third interface of the material selection device 4 is fixedly connected to the discharge pipe 48. An electric rotating mechanism is provided in the material selection device 4, and the electric rotating mechanism can control the ball stone 6 to pass through the second interface of the material selection device 4 or the third interface of the material selection device 4. The material selection device 4 should also be equipped with a corresponding control circuit. The core of the control circuit of this embodiment is a single-chip microcomputer. Each material selection device 4 is equipped with a single-chip microcomputer for control, and the single-chip microcomputers of each material selection device 4 can also be connected to the network through hardware such as 485, and unified control is achieved by one of the main controllers. Since the control method is very mature and is a commonly used control method in industry, the control part will not be introduced in detail here. This design can realize the control of the falling point of the balls and stones. When necessary, the corresponding interface can be opened to make the balls and stones fall. It can effectively prevent the balls from agglomerating and piling up, effectively disperse the balls and stones, and improve the grinding efficiency.

[0043] The material selection device 4 and the conduits at both ends are fixedly arranged in a tilted manner in the ball mill. The tilted arrangement is mainly for horizontal ball mills, which have a horizontal opening, one end for feeding and the other end for discharging. The material selection device 4 and the conduit are inserted into the feed port and maintained at a certain tilt angle, so that the balls can slowly roll into the ball mill to avoid impact caused by too fast movement of the balls.

[0044] In this embodiment, five material selection devices 4 are preferably provided, and each material selection device 4 is connected end to end through the conduits at both ends to form a long strip structure, and the material selection device 4 and the conduit are extended into the inner cavity of the ball mill through a fixed bracket arranged outside the ball mill. The first conduit 3 of the outermost material selection device 4 is connected to the receiving hopper 2. The fixed bracket outside the ball mill can be welded with angle steel, which forms a stable bracket with an inverted U-shaped structure with the material selection device 4 and the conduit. The material selection device 4 and the conduit are suspended in the inner cavity of the ball mill without contacting the ball mill. Such a structure does not require changing the original structure, but only requires adding a bracket to the original structure, which reduces the design and assembly costs.

[0045] More specifically, if Figures 2 to 10As shown, the material selection device 4 includes an outer shell 40, which is a hollow cylindrical structure. The outer shell 40 is composed of two arc-shaped shells that can be detachably assembled. The outer shell 40 is provided with an inner cavity 400, and a conduit fixing plate 401 is provided on both sides of the inner cavity 400. The conduit fixing plate 401 is provided with a threaded fixing hole 402. The ends of the conduits are provided with external threads (both ends of the first conduit 3 and the second conduit 5 are provided with external threads, which can be threadedly connected to the material selection device 4), and the conduits can be threadedly connected to the threaded fixing hole 402, so that it is convenient to disassemble and assemble, and the length of the feeding device can be flexibly extended or shortened according to the on-site conditions, so as to adapt to ball mills of different specifications.

[0046] The side wall of the outer shell 40 is provided with a discharge hole 403. A first bearing 42 and a second bearing 44 are coaxially fixedly arranged in the inner cavity 400, and a rotating drum 41 is inserted into the first bearing 42 and the second bearing 44. A gear ring 410 is fixedly arranged on the outer periphery of one end of the rotating drum 41. A drop hole 412 is provided on the side wall of the rotating drum 41. The diameter of the drop hole 412 should be larger than the diameter of the largest ball stone so that the ball stone can fall smoothly. A baffle 413 is provided on one side of the drop hole 412. The baffle 413 should be arranged on the lower side of the inclined rotating drum 41, preferably on the lower side edge of the drop hole 412, so that the ball stone can be well blocked from moving backwards and falling into the drop hole 412. The drop hole 412 corresponds to the discharge hole 403, and a discharge pipe 48 is fixedly arranged on the discharge hole 403. The inner hole diameters of the drop hole 412, the discharge hole 403 and the discharge pipe 48 are all larger than the diameter of the largest ball. After the ball passes through the drum 41 and falls into the drop hole 412, it can smoothly fall into the ball mill from the discharge hole 403 and the discharge pipe 48.

[0047] A rotating motor 43 is fixedly arranged on the outer ring of the first bearing 42, and a worm 430 is fixedly arranged on the output shaft of the rotating motor 43, and the worm 430 is meshed with the gear ring 410. In order to facilitate control, the rotating motor 43 used in this embodiment is a DC reduction motor, and a reduction motor with a 90-degree output shaft. There are many such motors on the market, and the products are mature, small in size, simple to control and low in cost. The rotating drum 41 is a tubular structure, and its inner diameter is equal to the inner diameter of the conduit. This makes it easier for the balls to roll in the tube and reduces the resistance caused by different apertures.

[0048] It should be noted that the discharge pipe 48 is preferably an arc-shaped curved pipe structure, which matches the inner wall of the ball mill. The arc-shaped curved pipe is arranged along the inner wall of the ball mill, so that when the balls fall in, they can roll down along the inner wall of the ball mill, so as not to directly impact the inner wall of the ball mill by free fall, causing equipment damage or ball burst. In addition, the inner cavity 400 is also fixed with a limited retaining ring 45 on both sides, and the limited retaining ring 45 is located on both sides of the rotating drum 41 but does not contact the rotating drum 41. The limited retaining ring 45 is an annular structure. This embodiment adopts a structure of adding a fixed wing plate outside the annular structure, which can reduce weight. Of course, the entire annular structure does not affect the realization of its function. The limited retaining ring 45 is mainly used to prevent the rotation of the rotating drum 41 from being blocked due to poor matching of the catheter when installing the catheter. The spacing between the limited retaining ring 45 and the rotating drum 41 should be controlled within 1mm to reduce the resistance of the rolling of the balls. The limit ring 45 is welded to the inner wall of the outer shell 40. During normal assembly, the limit ring 45 is subjected to relatively large force, and the welding method is the most stable, and it can also avoid the increase in assembly difficulty caused by too many parts. A position detection sensor 47 is fixedly set on one of the limit rings 45, and a positioning block 414 is set on the rotating drum 41, and the positioning block 414 and the position detection sensor 47 match each other. The positioning block 414 is a permanent magnet. The position detection sensor 47 is a Hall sensor. This is a commonly used, relatively mature and stable position detection method. The use of such a positioning method can reduce the number of tests and reduce the debugging cost. Through the cooperation of the position detection sensor 47 and the positioning block 414, the rotation position of the rotating drum 41 can be accurately known, so as to control the movement of the ball stone.

[0049] When working, the ball 6 enters the receiving hopper 2 from the conveyor belt 1. Since the interior of the receiving hopper 2 is an arc-shaped guiding slope, the falling ball 6 rolls into the first conduit 3 of the first material selection device 4 (enters by gravity, because the material selection devices and conduits are set obliquely). The control circuits in multiple material selection devices 4, especially the single-chip microcomputers, are interconnected to form a network. The controller first controls the material selection device 4 closest to the receiving hopper 2 to drop materials. After a certain dropping time, the following material selection devices 4 are allowed to drop materials in turn. This cycle is repeated, thereby achieving the effect of distributed feeding.

[0050] The specific control method is: the single chip microcomputer controls the rotating motor 43 to rotate, driving the worm 430, the gear ring 410, and the rotating drum 41 to rotate, until one of the position detection sensors 47 detects the signal of the positioning block 414, which means that the drop hole 412 in the rotating drum 41 is already located at the bottom side and aligned with the discharge hole 403. When the ball 6 rolls to the drop hole 412 in the rotating drum 41, it automatically falls into the drop hole 412 due to gravity, and slides into the ball mill along the discharge pipe 48 of the discharge hole 403. If the ball 6 moves faster or there are more balls 6, the drop hole 412 cannot temporarily remove too many balls 6, which may cause the ball to miss the drop hole 412. At this time, the baffle 413 set on the inner cavity 400 can play a blocking role to prevent the ball from missing. When enough balls fall in (it can be calculated by time, or a photoelectric sensor with a counting function is set on it), the material selection device 4 of this unit is closed, and the next material selection device 4 is allowed to select the same.

[0051] The closing steps are just the opposite of the above: the single chip microcomputer controls the rotating motor 43 to rotate in the opposite direction, driving the worm 430, the gear ring 410 and the drum 41 to rotate in the opposite direction, until another position detection sensor 47 detects the signal of the positioning block 414, which means that the drop hole 412 in the drum 41 is already at the top (the position detection sensor 47 is set at 180 degrees), and the ball stone will not be hindered when passing through the drum 41, and can directly enter the next material selection device 4. Such repeated cycles can achieve the functions of fixed-point, segmented and dispersed feeding.

[0052] The present invention can accurately select the material drop point by adding the material selection device 4 on the conduit to prevent the ball stones from gathering too much. By changing the feeding structure and the angle between the material selection device 4 and the conduit and the ball mill, the ball stones can be prevented from having too much impact on the ball mill and the noise can be reduced. The present invention has reasonable design, ingenious structure, low cost, convenient operation, good stability, and is easy to assemble and repair.

Claims

1. A ball mill ball feeding device, comprising a storage hopper, a conveyor belt (1), a receiving hopper (2) and a conduit, wherein a storage hopper is arranged above the conveyor belt (1), balls (6) are placed in the storage hopper, the balls (6) are moved into the receiving hopper (2) through the conveyor belt, and the receiving hopper (2) is connected to the conduit, characterized in that: The conduit is provided with a material selection device (4), and the material selection device (4) divides the conduit into a first conduit (3) and a second conduit (5); The material selection device (4) is a three-way structure, one end of the first conduit (3) is fixedly connected to the first interface of the material selection device (4); one end of the second conduit (5) is fixedly connected to the second interface of the material selection device (4); the third interface of the material selection device (4) is fixedly connected to the discharge pipe (48); The material selection device (4) is provided with an electric rotating mechanism, and the electric rotating mechanism can control the ball stone (6) to pass through the second interface of the material selection device (4) or the third interface of the material selection device (4); The material selection device (4) and the guide tubes at both ends thereof are arranged in an inclined and fixed manner in the ball mill; The material selection devices (4) are provided with five, each of which is connected end to end through conduits at both ends to form a long strip structure, and the material selection devices (4) and the conduits are extended into the inner cavity of the ball mill through a fixed bracket arranged outside the ball mill; wherein the first conduit (3) of the outermost material selection device (4) is connected to the material receiving hopper (2); The material selection device (4) comprises an outer shell (40), the outer shell (40) is a hollow cylindrical structure, and the outer shell (40) is composed of two detachable arc-shaped outer shells; The outer shell (40) is provided with an inner cavity (400), and catheter fixing plates (401) are provided on both sides of the inner cavity (400), and threaded fixing holes (402) are provided on the catheter fixing plates (401); The side wall of the outer shell (40) is provided with a discharge hole (403); A first bearing (42) and a second bearing (44) are coaxially fixedly disposed in the inner cavity (400), and a rotating cylinder (41) is inserted into the first bearing (42) and the second bearing (44); A gear ring (410) is fixedly provided on the outer periphery of one end of the rotating drum (41); a material drop hole (412) is opened on the side wall of the rotating drum (41), and a baffle (413) is provided on one side of the material drop hole (412); The material drop hole (412) corresponds to the material discharge hole (403), the material discharge pipe (48) is fixedly arranged on the material discharge hole (403), and the material discharge pipe (48) is an arc-shaped curved pipe structure, and the arc-shaped curved pipe structure matches the inner side wall of the ball mill; A rotating motor (43) is fixedly arranged on the outer ring of the first bearing (42), a worm (430) is fixedly arranged on the output shaft of the rotating motor (43), and the worm (430) and the gear ring (410) are meshed with each other; The rotating drum (41) is a tubular structure, and its inner diameter is equal to the inner diameter of the conduit.

2. The ball mill ball feeding device according to claim 1, characterized in that: Limit stop rings (45) are also fixedly arranged on both sides of the inner cavity (400); the limit stop rings (45) are located on both sides of the rotating drum (41) but do not contact the rotating drum (41).

3. The ball mill ball feeding device according to claim 2, characterized in that: The limit stop ring (45) is welded to the inner wall of the outer shell (40).

4. The ball mill ball feeding device according to claim 2, characterized in that: A position detection sensor (47) is fixedly arranged on one of the limit stop rings (45), and a positioning block (414) is arranged on the rotating drum (41), and the positioning block (414) and the position detection sensor (47) are matched with each other.

5. The ball mill ball feeding device according to claim 4, characterized in that: The positioning block (414) is a permanent magnet; The position detection sensor (47) is a Hall sensor.

6. The ball mill ball feeding device according to claim 1, characterized in that: Both ends of the first conduit (3) and the second conduit (5) are provided with external threads, which can be threadedly connected to the material selection device (4).

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