Ultralow-temperature material bead self-separation type basket mill

Abstract

The utility model relates to an ultralow-temperature material bead self-separation type basket mill which comprises an outer layer lower shell and an outer layer upper shell installed on the top of the outer layer lower shell, a grinding barrel is arranged in the outer layer lower shell, a grinding basket body is installed in the grinding barrel, a screening structure is installed at the bottom end of the grinding basket body, and the screening structure is arranged on the outer layer lower shell. The center of the screening structure is rotationally connected with a main shaft, before grinding, a liquid nitrogen tank is connected through a quick-assembly connector to form a liquid nitrogen cooling system, accurate regulation and control of an ultralow-temperature environment are achieved, the machining requirement of heat-sensitive materials is met, and meanwhile an inert gas environment formed by liquid nitrogen vaporization effectively prevents material oxidation; by means of innovative structural design, accurate temperature control, a reliable sealing system and an intelligent operation mode, the technical limitation of traditional grinding equipment in the field of precision machining is effectively solved, and the device is particularly suitable for production of high-added-value materials with strict requirements for the machining environment and has wide market application prospects.

Description

Technical Field

[0001] This utility model belongs to the technical field of basket mills, specifically relating to an ultra-low temperature bead self-separation type basket mill. Background Technology

[0002] A basket mill, also known as a basket grinder, is a device used for grinding materials. The working principle of this device is that the self-priming impeller draws in the material at high speed. The material enters the grinding basket and is ground by the stirring rotor and grinding balls. Finally, the ground material is discharged through a screen. This forms a high-efficiency cycle of material intake, grinding, and discharge, which solves the problem of material tumbling, avoids dead zones in the cycle, and can achieve excellent grinding results in a short time.

[0003] Traditional basket mills can only provide a normal temperature grinding environment and cannot achieve precise temperature control. This makes heat-sensitive materials prone to denaturation or decomposition during the grinding process. The grinding and drying processes are separated, requiring multiple material transfers, which reduces efficiency and increases the risk of contamination. In addition, the cooling system uses conventional water cooling, which has a slow cooling rate and large temperature fluctuations, and cannot meet the process requirements of ultrafine grinding. Utility Model Content

[0004] The purpose of this utility model is to provide a low-temperature ball self-separating basket mill with a simple structure and reasonable design in order to solve the above problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A cryogenic bead self-separating basket mill includes a lower outer shell and an upper outer shell mounted on top of the lower outer shell. A grinding cylinder is disposed inside the lower outer shell, and a grinding basket is installed inside the grinding cylinder. A screening structure is installed at the bottom end of the grinding basket. A main shaft is rotatably connected to the center of the screening structure. The bottom end of the main shaft extends below the screening structure and is connected to a dispersing device. The top of the main shaft extends upward into the upper outer shell. A boss retaining ring is fixedly fitted on the top position of the main shaft at the top of the grinding cylinder. A drive structure is installed on the top of the upper outer shell to drive the rotation of the main shaft. A quick-connect interface is installed on one side of the outer wall of the upper outer shell.

[0007] As a further optimization of this utility model, the grinding basket installed inside the grinding cylinder is provided with a feed inlet, which is designed in a conical shape.

[0008] As a further optimization of this utility model, the screening structure includes a connecting plate disposed at the bottom of the grinding basket, and a slit screen with an annular structure is installed on the connecting plate, wherein the mesh of the slit screen has a wedge-shaped structure.

[0009] As a further optimization of this utility model, the connecting plate has a plurality of annularly distributed mounting holes on its periphery. The connecting plate is fixed to the bottom of the grinding basket by external bolts in conjunction with the mounting holes. The connecting plate also has a through hole in its center for the main shaft to pass through.

[0010] As a further optimization of this utility model, grinding balls are provided inside the grinding basket, and a stirring rotor is fixedly installed on a section of the main shaft located in the inner cavity of the grinding basket.

[0011] As a further optimization of this utility model, the dispersing device is a turntable installed on the main shaft at one end below the connecting plate. Multiple dispersing blades are integrally formed on the circumference of the turntable, and two adjacent dispersing blades are arranged in opposite directions.

[0012] As a further optimization of this utility model, the drive structure includes a bearing housing mounted on the top wall of the outer upper shell, a motor fixedly connected to the top of the bearing housing, and the top end of the main shaft fixed to the output end of the motor via a coupling.

[0013] As a further optimization of this utility model, an observation window is installed on one side wall of the outer upper shell.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The conical feed inlet design of the grinding basket ensures uniform material distribution and avoids local accumulation; the unique wedge-shaped mesh slit screen structure enables efficient dynamic separation of grinding balls and materials, while the dispersing blades promote the circulation of materials in the grinding and dispersing zones during rotation; the integrated grinding-dispersing system, through optimized flow field design, enables materials to be simultaneously ultra-finely ground and finely dispersed in a single machine, greatly improving process efficiency.

[0016] 2. Before grinding, a liquid nitrogen tank is connected via a quick-connect interface to form a liquid nitrogen cooling system to achieve precise control of the ultra-low temperature environment, meeting the processing requirements of heat-sensitive materials. At the same time, the inert gas environment formed by the vaporization of liquid nitrogen effectively prevents the oxidation of materials.

[0017] 3. The outer upper shell, outer lower shell, grinding cylinder and boss retaining ring form a multi-layer sealing structure to ensure that the grinding medium will not leak in high-speed operation and low temperature environment, and to ensure the sealing performance of the equipment under extreme conditions;

[0018] 4. An observation window equipped with a high-definition house observation system is installed on the outer shell to realize visual monitoring of the process; integrated online control enables intelligent adjustment of process parameters to meet the needs of modern production management. Attached Figure Description

[0019] Figure 1This is a front view of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the connection structure between the slotted screen and the connecting plate of this utility model;

[0022] Figure 4 This is a utility model Figure 3 A schematic diagram of the cross-sectional structure;

[0023] Figure 5 This is a three-dimensional structural diagram of the boss retaining ring.

[0024] In the diagram: 1. Motor; 2. Bearing housing; 3. Outer upper shell; 4. Grinding cylinder; 5. Boss retaining ring; 6. Outer lower shell; 7. Dispersing blades; 8. Slit screen; 9. Grinding basket; 10. Stirring rotor; 11. Main shaft; 12. Quick-connect interface; 13. Observation window; 14. Connecting plate; 15. Mounting hole; 16. Through hole; 17. Connecting hole; 18. Air inlet. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0026] Example

[0027] like Figure 1 - Figure 5 As shown, an ultra-low temperature bead self-separating basket mill includes an outer lower shell 6 and an outer upper shell 3 installed on top of the outer lower shell 6. A grinding cylinder 4 is provided inside the outer lower shell 6. The outer upper shell 3, the outer lower shell 6 and the grinding cylinder 4 form a cavity structure to improve the thermal insulation performance of the overall structure.

[0028] The grinding cylinder 4 is equipped with a grinding basket 9. The grinding basket 9 has a feed inlet with a conical design to ensure that the material is evenly distributed in the grinding basket 9 and to avoid local accumulation of material, which would affect the grinding efficiency.

[0029] A screening structure is installed at the bottom of the grinding basket 9. The screening structure includes a connecting plate 14 set at the bottom of the grinding basket 9. A slit screen 8 with an annular structure is installed on the connecting plate 14. The mesh of the slit screen 8 is wedge-shaped. The unique wedge-shaped screen structure can realize the efficient dynamic separation of grinding media and materials and reduce material blockage.

[0030] The connecting plate 14 has multiple annularly distributed mounting holes 15 on its periphery. The connecting plate 14 is fixed to the bottom of the grinding basket 9 by external bolts that fit into the mounting holes 15. The connecting plate 14 is fixed by a screw connection, which not only makes the connection stable, but also makes it easy to disassemble and clean the slotted screen 8 when blockage occurs inside the slotted screen 8.

[0031] The connecting plate 14 also has a through hole 16 in the center. The main shaft 11 is rotatably connected in the through hole 16. The bottom end of the main shaft 11 extends to the bottom of the screening structure and is connected to a dispersing device. The dispersing device is a turntable installed on the bottom end of the main shaft 11 located below the connecting plate 14. Multiple dispersing blades 7 are integrally formed on the circumference of the turntable. Two adjacent dispersing blades 7 are arranged in opposite directions. When the main shaft 11 rotates, it can drive the dispersing blades 7 to rotate at high speed, promote the circulation of the ground material in the grinding zone and the dispersing zone, and enable the material to complete ultrafine grinding and fine dispersion simultaneously in a single machine, greatly improving the process efficiency.

[0032] The top of the main shaft 11 extends upward into the outer upper shell 3. Grinding balls are provided in the grinding basket 9. A stirring rotor 10 is fixedly installed on a section of the main shaft 11 located in the inner cavity of the grinding basket 9. When the main shaft 11 rotates, it can also drive the stirring rotor 10 to rotate, causing the grinding balls in the inner cavity of the grinding basket 9 to grind and collide with the material, so as to achieve the purpose of fine grinding of the material.

[0033] The main shaft 11 is fixedly fitted with a boss retaining ring 5 at the top of the grinding cylinder 4. The boss retaining ring 5 has a connecting hole 17 in the center that matches the outer diameter of the main shaft 11. The boss retaining ring 5 is fitted onto the main shaft 11 through the connecting hole 17 and fixed to the main shaft 11. It is used to block the material during the grinding process and to avoid leakage caused by the material splashing due to grinding impact.

[0034] The top of the outer upper shell 3 is equipped with a drive structure for driving the main shaft 11 to rotate. The drive structure includes a bearing housing 2 installed on the top wall of the outer upper shell 3. A motor 1 is fixedly connected to the top of the bearing housing 2. The top of the main shaft 11 is fixed to the output end of the motor 1 through a coupling. It is used to drive the main shaft 11 to rotate at high speed after the motor 1 is powered on, thereby driving the stirring rotor 10 to rotate in the grinding basket 9 to grind the material. At the same time, it drives the dispersing blades 7 to quickly disperse the ground material.

[0035] A quick-connect interface 12 is installed on one side of the outer wall of the outer upper shell 3. The quick-connect interface 12 is used to connect to an external liquid nitrogen tank. After liquid nitrogen enters the outer upper shell 3, it can enter the grinding basket 9 through the air inlet 18 opened on the side of the boss retaining ring 5. With the special design of the composite cavity structure, it can achieve excellent temperature holding performance and achieve precise control of the ultra-low temperature environment to meet the processing requirements of heat-sensitive materials. At the same time, the inert gas environment formed by the vaporization of liquid nitrogen can effectively prevent the oxidation of materials.

[0036] An observation window 13 is installed on one side wall of the outer upper shell 3. The observation window 13 is equipped with a high-definition anti-fog observation system to realize the visual monitoring of the process, integrate online control, realize the intelligent adjustment of process parameters, and meet the needs of modern production management.

[0037] It should be noted that this ultra-low temperature ball self-separating basket mill, when in use, the material to be ground is introduced into the grinding basket 9, and then the external liquid nitrogen tank is connected using the quick-connect interface 12 to introduce liquid nitrogen into the device. Combined with the composite cavity structure formed by the outer upper shell 3, the outer lower shell 6, and the grinding cylinder 4, it achieves excellent temperature retention performance of the material, enabling precise control of the ultra-low temperature environment. Simultaneously, the inert gas generated by the evaporation of liquid nitrogen can expel oxygen from the device, preventing oxidation of the material during grinding. After the oxygen is completely expelled, the user can start the motor 1 to drive the main shaft 11 to rotate. During the rotation of the middle section of the main shaft 11, it can drive the stirring rotor 10 to rotate, causing the grinding balls in the inner cavity of the grinding basket 9 to grind and collide with the material, achieving the purpose of fine grinding. The ground material falls through the lower slit screen 8 and is quickly dispersed and dried under the action of the high-speed rotating dispersing blades 7, making it convenient for the user.

[0038] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A low-temperature ball self-separating basket mill, comprising an outer lower shell (6) and an outer upper shell (3) mounted on top of the outer lower shell (6), characterized in that: The lower outer shell (6) is provided with a grinding cylinder (4), and a grinding basket (9) is installed inside the grinding cylinder (4). A sieving structure is installed at the bottom of the grinding basket (9). A main shaft (11) is rotatably connected to the center of the sieving structure. The bottom of the main shaft (11) extends to the bottom of the sieving structure and is connected to a dispersing device. The top of the main shaft (11) extends upward into the upper outer shell (3). A boss retaining ring (5) is fixedly fitted on the top of the grinding cylinder (4). A driving structure is installed on the top of the upper outer shell (3) to drive the rotation of the main shaft (11). A quick-install interface (12) is installed on one side of the outer wall of the upper outer shell (3).

2. The ultra-low temperature bead self-separation type basket mill according to claim 1, characterized in that: The grinding basket (9) installed inside the grinding cylinder (4) has a feed inlet with a conical design.

3. The ultra-low temperature bead self-separating basket mill according to claim 1, characterized in that: The screening structure includes a connecting plate (14) disposed at the bottom of the grinding basket (9), and a slit screen (8) with an annular structure is installed on the connecting plate (14). The mesh of the slit screen (8) is wedge-shaped.

4. The ultra-low temperature bead self-separation type basket mill according to claim 3, characterized in that: The connecting plate (14) has a plurality of annularly distributed mounting holes (15) on its periphery. The connecting plate (14) is fixed to the bottom of the grinding basket (9) by external bolts in conjunction with the mounting holes (15). The connecting plate (14) also has a through hole (16) in the center for the main shaft (11) to pass through.

5. A low-temperature self-separating basket mill for pellets according to claim 1, characterized in that: Grinding balls are provided inside the grinding basket (9), and a stirring rotor (10) is fixedly installed on a section of the main shaft (11) located in the inner cavity of the grinding basket (9).

6. A low-temperature self-separating basket mill for pellets according to claim 4, characterized in that: The dispersing device is a turntable installed on the main shaft (11) at one end below the connecting plate (14). Multiple dispersing blades (7) are integrally formed on the circumference of the turntable, and two adjacent dispersing blades (7) are arranged in opposite directions.

7. A low-temperature self-separating basket mill for pellets according to claim 1, characterized in that: The drive structure includes a bearing housing (2) mounted on the top wall of the outer upper housing (3), a motor (1) is fixedly connected to the top of the bearing housing (2), and the top end of the main shaft (11) is fixed to the output end of the motor (1) through a coupling.

8. A low-temperature self-separating basket mill for pellets according to claim 1, characterized in that: An observation window (13) is installed on one side wall of the outer upper shell (3).

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