A down-feed up-exit closed type stirring ball mill

Abstract

The utility model is suitable for stirring ball mill device technical field provides a kind of lower into upper closed type stirring ball mill device, including jar body, pump body and upper sieve plate;The jar body top installs discharge bin, slurry outlet is opened on the discharge bin, the valve is arranged at the bottom of jar body, the pump body is connected on valve, the jar body has grinding cavity, the central shaft is arranged in grinding cavity, a plurality of stirring rods are fixed on the central shaft, the upper sieve plate is installed on the top of jar body, the ball adding hole is arranged on the upper sieve plate, the plug can be detachably connected on the ball adding hole, the main shaft hole is opened in the center of the upper sieve plate, the central shaft passes through main shaft hole, the discharge notch is further provided on the upper sieve plate.The utility model solves the problem of ball loss, loss, subsequent separation work complexity and cost increase caused by the fact that the grinding ball is discharged together with slurry when the existing lower into upper stirring ball mill discharges.

Description

Technical Field

[0001] This utility model applies to the field of stirred ball milling device technology, and particularly relates to a bottom-inlet, top-outlet closed stirred ball milling device. Background Technology

[0002] Vertical stirred ball mills, a common type of equipment used for grinding or dispersing micron-sized powders, can be categorized into top-in, bottom-out and bottom-in, top-out types based on their feed and discharge positions. The bottom-in, top-out type, in particular, operates by feeding from the bottom and discharging from the top. However, this design has some significant drawbacks in practical applications.

[0003] Especially during the process of adding grinding balls and stirring, it is necessary to add grinding balls to the equipment periodically to maintain sufficient impact and crushing pressure in order to ensure grinding efficiency and effect. However, in the existing design, during the discharge operation, the lack of an effective screening device causes the grinding balls to be discharged from the outlet along with the slurry. This not only causes the loss and unnecessary waste of grinding balls, but also increases the complexity and cost of subsequent separation work.

[0004] To solve the above-mentioned technical problems, this utility model designs a bottom-inlet, top-outlet closed-type stirring ball mill device. Utility Model Content

[0005] This invention provides a bottom-inlet, top-outlet enclosed stirred ball mill device, which aims to solve the problems of ball loss and damage caused by the discharge of grinding balls along with the slurry in existing bottom-inlet, top-outlet stirred ball mills, as well as the complexity and increased cost of subsequent separation work.

[0006] A bottom-in, top-out enclosed stirred ball mill includes a tank, a pump body, and an upper screen plate. A discharge hopper is installed at the top of the tank, with a slurry outlet on the discharge hopper. A valve is installed at the bottom of the tank, and the pump body is connected to the valve. The tank contains a grinding chamber with a central shaft inside. Multiple stirring rods are fixed to the central shaft. The upper screen plate is installed at the top of the tank and has ball-adding holes with detachable plugs. A main shaft hole is located at the center of the upper screen plate, through which the central shaft passes. A discharge trough is also provided on the upper screen plate.

[0007] Based on the above technical solution, the tank body includes an inner layer and an outer layer, the inner layer forms a grinding chamber, a cooling interlayer is formed between the inner layer and the outer layer, and the outer layer is provided with a coolant inlet and a coolant outlet that communicate with the cooling interlayer.

[0008] Based on the above technical solution, it also includes a lower sieve plate and a funnel, wherein the lower sieve plate is installed at the bottom of the tank and the funnel is disposed between the valve and the tank.

[0009] Based on the above technical solution, a buffer tank is also included, which is connected to the slurry outlet of the discharge hopper and is also connected to the pump body.

[0010] Beneficial effects

[0011] Compared with existing technologies, the beneficial effects of this utility model are: 1. By adding an upper sieve plate at the top, not only is the grinding balls prevented from overflowing from the discharge port, but the grinding balls are also confined within a limited space, increasing the frequency and force of impact between the balls during high-speed rotation. This design significantly improves grinding efficiency, allowing the material to be more fully and uniformly refined. 2. This device can either directly discharge the slurry after a single grinding, or circulate the initially ground slurry through a pump buffer tank for multiple grinding cycles to achieve finer particle size requirements. This flexibility allows for adjustments to the operating mode according to different production process needs, adapting to a wider range of application scenarios and meeting different requirements for product particle size. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.

[0013] Figure 1 : A schematic diagram of the structure of this utility model;

[0014] Figure 2 : A schematic diagram of the structure of the tank described in this utility model;

[0015] Figure 3 : A schematic diagram of the structure of the upper sieve plate described in this utility model. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and examples:

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] like Figure 1 As shown, a bottom-in, top-out enclosed stirring ball mill device includes a tank 1, a pump body 4, and an upper screen plate 7; a discharge hopper 2 is installed on the top of the tank 1, and a slurry outlet 21 is opened on the discharge hopper 2; a valve 3 is installed at the bottom of the tank 1, and the pump body 4 is connected to the valve 3.

[0021] A valve 3 is installed at the bottom of the tank 1, and a pump body 4 is connected to this valve 3. This allows the slurry to be fed into the tank 1 through the pump body 4 for grinding, and the feeding and discharging speed and timing can be adjusted according to actual needs. After the slurry has been fully ground, it will overflow from the slurry outlet 21 at the top, enter the discharge hopper 2, and then be discharged through the slurry outlet 21.

[0022] The tank 1 has a grinding chamber 13, in which a central shaft 5 is disposed, and multiple stirring rods 6 are fixedly connected to the central shaft 5. The central shaft 5 and the stirring rods 6 stir within the grinding chamber 13.

[0023] It also includes a drive motor, the output end of which is connected to the central shaft 5. The drive motor drives the central shaft 5 and the stirring rod 6 to rotate. As the central shaft 5 rotates at high speed, the stirring rod 6 effectively agitates the grinding balls and slurry, increasing the frequency and force of collisions between the grinding balls. This not only improves grinding efficiency but also allows the material to be ground more uniformly and finely.

[0024] like Figure 3As shown, the upper screen plate 7 is installed on the top of the tank 1. The upper screen plate 7 has a ball-adding hole 71, and a detachable plug 72 is connected to the ball-adding hole 71. A main shaft hole 73 is opened at the center of the upper screen plate 7, through which the central shaft 5 passes, allowing the central shaft 5 to pass and rotate freely. This ensures that the stirring rod 6 can drive the grinding balls to move efficiently without affecting the function of the upper screen plate, achieving a balance between compact structure and complete function. The upper screen plate 7 also has a discharge trough 74.

[0025] The ball-adding holes 71 on the upper sieve plate 7 are equipped with detachable plugs 72, allowing for easy addition of grinding balls to the tank when needed without stopping the entire equipment or performing a complex disassembly process. This design greatly improves the ease and efficiency of operation.

[0026] The upper screen plate 7 effectively prevents grinding balls from overflowing from the top along with the slurry, ensuring that only fully ground slurry can be discharged through the discharge port 74. This not only avoids unnecessary wear and tear on the grinding balls but also reduces the complexity and cost of subsequent separation work. The discharge ports 74 on the upper screen plate 7 are fan-shaped, increasing the discharge area and improving the slurry discharge efficiency.

[0027] Because the upper sieve plate 7 is located at the top of the tank, and the design of the ball-filling hole 71 and the plug 72 makes them easy to access and operate, routine maintenance and cleaning are more convenient and quick. Furthermore, replacing or repairing the central shaft 5 or the stirring rod 6 can also be done relatively easily.

[0028] like Figure 2 As shown, the tank 1 includes an inner layer 11 and an outer layer 12. The inner layer 11 forms a grinding chamber 13. A cooling interlayer 14 is formed between the inner layer 11 and the outer layer 12. The outer layer 12 is provided with a coolant inlet 15 and a coolant outlet 16 that communicate with the cooling interlayer 14.

[0029] The cooling jacket 14 allows cold water or other cooling media to be injected into the jacket through the coolant inlet 15 and discharged through the coolant outlet 16, thereby effectively controlling the temperature inside the grinding chamber 13. This is especially important for grinding processes that need to be carried out under specific temperature conditions, as it can prevent changes in material properties or reduction in grinding efficiency due to overheating.

[0030] The device also includes a lower sieve plate 8 and a funnel 81. The lower sieve plate 8 is installed at the bottom of the tank body 1, and the funnel 81 is located between the valve 3 and the tank body 1.

[0031] The upper screen plate 7 and the lower screen plate 8 are made of wear-resistant material. During the grinding process, there is continuous friction and impact between the grinding balls and the screen plate. Using wear-resistant material can significantly improve the durability of the screen plate, reduce damage or deformation of the screen plate caused by wear, and thus extend its service life.

[0032] The lower screen plate 8 is located at the bottom of the tank, allowing the slurry to pass through while blocking the grinding balls. This ensures that the grinding balls are not discharged during the slurry discharge process, avoiding the loss of grinding balls and unnecessary replenishment costs.

[0033] The funnel 81 is positioned between the valve 3 and the tank 1 to help guide the slurry.

[0034] Sealing rings are installed between the tank body 1 and the discharge hopper 2, and between the tank body 1 and the valve 3. The main function of the sealing rings is to prevent slurry leakage at these connection points.

[0035] This device has two modes: one-time grinding and multiple-cycle grinding.

[0036] Discharge after one-time grinding: The slurry enters from the bottom of the tank 1 through the pump body 4 and completes one grinding process through the impact and crushing action of the grinding balls. When the slurry reaches the top and is discharged through the discharge chute 74 on the upper screen plate 7, the entire grinding process is complete. This method is suitable for situations where the particle size requirement is not particularly high, or for the preliminary treatment stage.

[0037] The device also includes a buffer tank 9, which is connected to the slurry outlet 21 of the discharge bin 2. The buffer tank 9 is also connected to the pump body 4, so that the slurry that has been pre-ground can be pumped back from the buffer tank 9 to the tank body 1 through the pump body 4.

[0038] Multiple-cycle grinding: The slurry after the initial grinding is not discharged directly, but instead guided back to the pump body 4 through a pipeline system via the buffer tank 9, where it is pumped back into the tank for a new round of grinding. This process can be repeated multiple times until the slurry reaches the required fineness. This method is particularly suitable for applications requiring very fine particles, such as raw material processing in certain chemical products, coatings, or pharmaceutical industries.

[0039] It should be noted that the valves, pump bodies, drive motors, etc. in this embodiment are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0040] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A bottom-in, top-out enclosed stirring ball mill device, characterized in that: The system includes a tank (1), a pump (4), and an upper screen plate (7). A discharge hopper (2) is installed on the top of the tank (1), and a slurry outlet (21) is provided on the discharge hopper (2). A valve (3) is provided at the bottom of the tank (1), and the pump (4) is connected to the valve (3). The tank (1) has a grinding chamber (13), and a central shaft (5) is provided in the grinding chamber (13). Multiple stirring rods (6) are fixed on the central shaft (5). The upper screen plate (7) is installed on the top of the tank (1). A ball-adding hole (71) is provided on the upper screen plate (7), and a plug (72) is detachably connected to the ball-adding hole (71). A main shaft hole (73) is provided in the center of the upper screen plate (7), and the central shaft (5) passes through the main shaft hole (73). A discharge trough (74) is also provided on the upper screen plate (7).

2. The bottom-in, top-out enclosed stirred ball mill device according to claim 1, characterized in that: The tank (1) includes an inner layer (11) and an outer layer (12). The inner layer (11) forms a grinding chamber (13). A cooling interlayer (14) is formed between the inner layer (11) and the outer layer (12). The outer layer (12) is provided with a coolant inlet (15) and a coolant outlet (16) that communicate with the cooling interlayer (14).

3. The bottom-in, top-out enclosed stirred ball mill device according to claim 2, characterized in that: It also includes a lower sieve plate (8) and a funnel (81), the lower sieve plate (8) being installed at the bottom of the tank body (1), and the funnel (81) being disposed between the valve (3) and the tank body (1).

4. A bottom-in, top-out enclosed stirred ball mill device according to claim 1, characterized in that... It also includes a buffer tank (9), which is connected to the slurry outlet (21) of the discharge hopper (2) and is also connected to the pump body (4).

5. A bottom-in, top-out enclosed stirred ball mill device according to claim 1, characterized in that: It also includes a drive motor, the output end of which is connected to the central shaft (5), and the drive motor is used to drive the central shaft (5) and the stirring rod (6) to rotate.

6. The bottom-in, top-out enclosed stirred ball mill device according to claim 1, characterized in that: Sealing rings are provided between the tank (1) and the discharge bin (2), and between the tank (1) and the valve (3).

7. A bottom-in, top-out enclosed stirred ball mill device according to claim 1, characterized in that: The discharge slots (74) on the upper screen plate (7) are distributed in a fan shape.

8. A bottom-in, top-out enclosed stirred ball mill device according to claim 3, characterized in that: The upper sieve plate (7) and the lower sieve plate (8) are made of wear-resistant materials.

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