Ball milling tank

Abstract

The invention provides a ball milling tank, and relates to the technical field of ball milling, the ball milling tank comprises a tank body and a cover body covering the tank body, and the cover body and the tank body define a grinding chamber; the cover body is provided with a regulation and control assembly, and the regulation and control assembly comprises at least one vacuumizing connector which penetrates through the cover body, communicates with the grinding cavity and is used for being connected with vacuumizing equipment to exhaust gas in the grinding cavity; the at least one gas inlet connector penetrates through the cover body, is communicated with the grinding chamber and is used for being connected with an external gas source so as to fill protective gas into the grinding chamber; wherein a first control valve and a second control valve which are used for controlling the vacuumizing connector and the air inlet connector to be connected and disconnected are arranged on the vacuumizing connector and the air inlet connector respectively. According to the invention, a stable and controllable atmosphere environment can be formed in the grinding chamber, and the processing requirements of high-precision and high-purity materials are met.

Description

Technical Field

[0001] This invention relates to the field of ball milling technology, and in particular to a ball milling jar. Background Technology

[0002] Ball milling technology is one of the core technologies in the field of material crushing and ultrafine grinding. It has the advantages of convenient operation, excellent grinding efficiency and adaptability to a variety of materials. It is widely used in many industries such as chemical, pharmaceutical and new energy, and can meet the stringent requirements for material particle size in actual production and experimental scenarios.

[0003] Existing ball mill jars mainly fall into two structural categories: the first is an open ball mill jar, where the jar opening has no dedicated sealing structure and the inside of the jar is directly connected to the outside atmosphere during the material grinding process; the second is a basic sealed ball mill jar, which usually achieves a basic seal at the jar opening only through simple components such as rubber gaskets and sealing caps to isolate external impurities.

[0004] However, in practical applications, both types of ball mill jars have shortcomings and are difficult to adapt to the processing requirements of special materials. Specifically: the internal environment of an open ball mill jar is completely exposed to the outside environment. When processing materials that are easily oxidized, easily affected by moisture, or sensitive to impurities, it is very easy to cause material oxidation, moisture absorption, or impurity contamination, leading to material deterioration, decreased purity, and seriously affecting the quality of the final product. The basic sealed ball mill jar lacks internal environment control components such as vacuuming and inert gas filling. It cannot remove residual air from the jar and fill it with inert gas to create a stable inert protective atmosphere, which limits its applicability in high-precision, high-purity special material processing scenarios and makes it difficult to meet the processing requirements of high-precision, high-purity materials. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a ball mill jar that aims to solve at least one of the technical problems mentioned in the background art.

[0006] The purpose of this invention is to provide a ball milling jar, including a jar body and a cover that fits onto the jar body, wherein the cover and the jar body together form a grinding chamber; The cover is provided with a control component, which includes: At least one vacuum port, which penetrates the cover and communicates with the grinding chamber, is used to connect a vacuum device to expel gas from the grinding chamber; At least one air inlet port extends through the cover and communicates with the grinding chamber for connecting an external air source to fill the grinding chamber with protective gas; The vacuum port and the air inlet port are respectively equipped with a first control valve and a second control valve for controlling their on / off state.

[0007] In addition, the ball mill jar according to the present invention may also have the following additional technical features: Furthermore, both the first control valve and the second control valve are provided with a first passage and a second passage that is selectively connected to the first passage. The first passage is connected to the vacuum port or the air inlet port, and the second passage is used to connect to the vacuum equipment or the external air source.

[0008] Furthermore, the first passage is arranged along the axial direction of the vacuum port or the air inlet port, and the second passage is an L-shaped or inverted T-shaped structure.

[0009] Furthermore, both the first control valve and the second control valve are shut-off valves, comprising: The valve body is fixedly mounted on the cover, and the valve body is provided with the first passage. A valve core is axially movable within the valve body, and the valve core contains the second passage. A driving component, one end of which is fixedly connected to the valve core, and the other end of which is threadedly connected to the valve body; The valve core has a sealing part at one end, and the valve body has a valve port that cooperates with the sealing part. By rotating the driving member, the valve core can be driven to move axially relative to the valve body, so that the sealing part is in contact with or separates from the valve port, thereby realizing the disconnection or connection between the first passage and the second passage.

[0010] Furthermore, the mating surface between the sealing part and the valve port is a spherical sealing structure or a conical sealing structure.

[0011] Furthermore, the other end of the valve core is provided with a connecting part, and the peripheral surface of the connecting part is provided with a plurality of connecting protrusions. The plurality of connecting protrusions are spaced apart along the axial direction of the valve core. The connecting part is used to connect the connecting pipe of the vacuum device or an external air source.

[0012] Furthermore, at least two valve core sealing rings are provided between the circumferential surface of the valve core and the inner wall of the valve body, and a plurality of valve core sealing rings are spaced apart along the axial direction of the valve core.

[0013] Furthermore, the ball mill jar also includes a sealing assembly, which includes an annular sealing groove disposed on the top end face of the jar body or the bottom end face of the cover body, and an end face sealing ring embedded in the annular sealing groove.

[0014] Furthermore, the can body and the cover body are connected by a plurality of locking components, which are evenly distributed around the circumference of the can body.

[0015] Furthermore, the control component also includes a pressure monitor, which is mounted on the cover and communicates with the grinding chamber.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting a control component on the cover, the purpose of vacuuming and filling the grinding chamber formed by the combination of the tank and the cover is achieved, so that a stable and controllable atmosphere environment is formed in the grinding chamber, which meets the processing requirements of high precision and high purity materials and improves the applicability of the ball mill tank. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of the ball mill jar of the present invention.

[0018] The above-mentioned drawings include the following reference numerals: 11-tank body; 12-cover body; 13-sealing groove; 14-end face sealing ring; 101-mounting through hole; 102-vacuum interface; 103-air inlet interface; 20-first control valve; 30-second control valve; 31-valve body; 32-valve core; 321-sealing part; 322-connecting part; 323-connecting protrusion; 33-driving component; 34-valve core sealing ring; 301-first passage; 302-second passage.

[0019] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0020] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0021] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Please see Figure 1 The image shows a ball mill jar according to the present invention. Its core design objective is to solve the problems of purity reduction and performance degradation caused by environmental interference during the ball milling process of special materials that are easily oxidized, easily affected by moisture, and easily react with air components. By precisely controlling the atmosphere of the grinding chamber, the quality stability of the material after grinding is ensured. The ball mill jar of this application includes a jar body 11, a cover 12, a control component, a sealing component, and a locking component. The interior of the jar body 11 is a cylindrical grinding chamber, and the cover 12 covers the jar body 11 and, together with the jar body 11, forms a sealed grinding chamber.

[0024] The cover 12 is equipped with a control component that integrates vacuuming, gas intake, pressure monitoring, and flow control functions. Specifically, the control component includes at least one vacuuming port 102 and at least one gas intake port 103. One end of the vacuuming port 102 penetrates the cover 12 and communicates with the grinding chamber, while the other end is used to connect to a vacuuming device to expel gas from the grinding chamber. One end of the gas intake port 103 penetrates the cover 12 and communicates with the grinding chamber, while the other end is used to connect to an external gas source to fill the grinding chamber with protective gas. The external gas source can be an inert gas cylinder such as argon or nitrogen, or a specially designed protective gas generator, to fill the grinding chamber with a protective gas of a preset composition. One or two of the two ports can be set according to the volume of the tank 11 and the gas replacement requirements, and they are evenly distributed around the circumference of the cover 12 to ensure the uniformity of gas replacement.

[0025] As a specific example, in this embodiment, both the vacuum port 102 and the air inlet port 103 are stepped through-hole structures, penetrating the cover 12. Their small-end ports face and communicate with the grinding chamber, while the large-end port is used to install a control valve. The aperture of the small-end port matches the aperture of the first passage 301 of the control valve, ensuring smooth gas flow. Furthermore, a positioning step can be provided on the inner wall of the large-end port to achieve precise installation and sealing positioning of the control valve. Even further, in some embodiments, a perforated sealing ring (not shown) can be embedded in the large-end port of the interface. The aperture of the perforated sealing ring matches the aperture of the small-end port to prevent material particles from entering the passage.

[0026] In this embodiment, the vacuum port 102 and the air inlet port 103 are respectively provided with a first control valve 20 and a second control valve 30 for controlling their on / off states, so as to independently control the on / off states of the two gas passages. Specifically, the first control valve 20 and the second control valve 30 are each provided with a first passage 301 and a second passage 302 that is selectively connected to the first passage 301. The first passage 301 is used to connect with the vacuum port 102 or the air inlet port 103, and the second passage 302 is used to connect with the vacuum equipment or an external gas source.

[0027] In this embodiment, the first control valve 20 and the second control valve 30 have completely identical structures, both being shut-off valves. Each valve includes a valve body 31, a valve core 32, and a drive component 33. The bottom end of the valve body 31 is fixedly welded to the large end port of the corresponding interface on the cover 12. The valve body 31 has a first passage 301, one end of which communicates with the small end port of the interface, and the other end extends into the valve body 31 to connect with the valve port, forming the main channel for gas flow. The valve core 32 is axially movable within the cavity of the valve body 31. Specifically, the valve body 31 has a guide groove communicating with the valve port, which is structurally compatible with the valve core 32. The valve core 32 has a second passage 302, and one end of the valve core 32 has a sealing part 321 that cooperates with the valve port within the valve body 31.

[0028] Furthermore, the first passage 301 is arranged axially along the vacuum port 102 or the air inlet port 103, and the second passage 302 is L-shaped or inverted T-shaped. As a specific example, in this embodiment, the second passage 302 is L-shaped, with its vertical passage extending axially along the valve core 32 and its transverse passage extending radially along the valve core 32 and penetrating the circumference of the valve core 32, so that the second passage 302 can selectively communicate with the first passage 301 through its transverse passage. It should be noted that the shape and structure design of the second passage 302 can effectively avoid the direct axial alignment between the gas passage on the control valve and the interface on the cover 12. When the two passages are connected, the gas needs to undergo transverse and vertical turning flow, using the change in gas flow direction to form a buffer effect on the airflow. At the same time, with the help of the transverse passage design, the negative pressure adsorption force generated by the high-speed airflow in the grinding chamber during vacuuming is prevented from directly acting on the passage port, structurally blocking the path of material being sucked out, effectively solving the problem of material backflow that is prone to occur in traditional straight-through orifice control valves.

[0029] Furthermore, the mating surface between the sealing part 321 and the valve port is a spherical sealing structure or a conical sealing structure to ensure an effective seal is formed when they are fitted together, preventing gas leakage and material particles from entering the passage. As a specific example, in this embodiment, the sealing part 321 is a convex spherical structure, and the valve port is a concave spherical groove structure.

[0030] One end of the drive member 33 is fixedly connected to the valve core 32, and the other end is threadedly connected to the valve body 31. In this embodiment, the drive member 33 is a cap-type structure, with the valve core 32 passing through its end and fixedly connected to the middle of the valve core 32. Its circumferential inner wall is provided with an internal thread structure for threaded connection with the valve body 31. In practical applications, by rotating the drive member 33, the valve core 32 is driven to move axially relative to the valve body 31 using threaded transmission, so that the sealing part 321 is in contact with or separated from the valve port, thereby realizing the disconnection or connection of the first passage 301 and the second passage 302. The threaded transmission design allows for fine adjustment of the sealing pressure, ensuring the tightness of the seal 321 and the valve port.

[0031] Furthermore, the other end of the valve core 32, that is, the end of the valve core 32 away from the sealing part 321, is provided with a connecting part 322 for connecting a vacuum device or an external air source. The connecting part 322 has multiple connecting protrusions 323 on its circumferential surface. The multiple connecting protrusions 323 are spaced apart along the axial direction of the valve core 32. The protrusion height of the connecting protrusions 323 is 0.5mm-1mm to ensure the stability of the connection between the connecting pipe and the connecting part 322.

[0032] Furthermore, at least two valve core sealing rings 34 are provided between the circumferential surface of the valve core 32 and the inner wall of the valve body 31, and multiple valve core sealing rings 34 are spaced apart along the axial direction of the valve core 32. As a specific example, in this embodiment, two valve core sealing rings 34 are provided between the circumferential surface of the valve core 32 and the inner wall of the valve body 31 to form a double sealing structure, which is used to seal the gap between the valve core 32 and the inner wall of the valve body 31, prevent gas from leaking from the gap, and effectively improve the sealing performance between the valve core 32 and the valve body 31 and the reliability of the gas passage control in the entire device; at the same time, in some embodiments, this double sealing design works in conjunction with the overall sealing of the grinding chamber. When grinding materials containing liquid in the grinding chamber, an annular guide groove can be provided on the end face of the small end port of the interface. The liquid material can form an annular liquid film in the guide groove, and the passage port is naturally sealed by surface tension. Together with the valve core sealing rings 34, it constitutes a double protection of mechanical seal + liquid seal, further enhancing the sealing effect.

[0033] The ball mill jar of this application also includes a sealing assembly, which includes an annular sealing groove 13 disposed on the top end face of the jar body 11 or the bottom end face of the cover 12, and an end face sealing ring 14 embedded in the annular sealing groove 13. As a specific example, in this embodiment, a sealing groove 13 is provided on the bottom end face of the cover 12, that is, the end face where the cover 12 and the jar body 11 meet. The end face sealing ring 14 is embedded in the sealing groove 13. The connection gap between the cover 12 and the jar body 11 is sealed by the cooperation between the end face sealing ring 14 and the sealing groove 13, thereby improving the sealing performance between the cover 12 and the jar 11, so that an adjustable vacuum or inert gas environment can be formed in the grinding chamber to meet the ball milling requirements of special materials that are easily oxidized or easily affected by moisture.

[0034] Furthermore, the can body 11 and the cover 12 of this application are connected by multiple locking components (not shown in the figure), which are evenly distributed around the circumference of the can body 11. As a specific example, in this embodiment, the can body 11 and the cover 12 are respectively provided with mounting through holes 101 in the circumference. The locking component adopts a combination structure of bolts, nuts and elastic washers. The bolt passes through the mounting through holes 101 of the cover 12 and the can body 11 in sequence and is screwed to the nut. The elastic washer is selected as a spring washer or a wave washer. By tightening the nut, an axial clamping force is applied, so that the cover 12 and the can body 11 fit tightly together, thereby realizing the fastening connection between the cover 12 and the can body 11.

[0035] The control components of this application also include a pressure monitor (not shown in the figure). The pressure monitor is installed on the cover 12 and communicates with the grinding chamber. Specifically, the pressure monitor is a high-precision pressure gauge or pressure sensor, installed in a dedicated mounting hole on the cover 12. The mounting hole is directly connected to the grinding chamber. The detection end of the pressure monitor extends into the mounting hole to monitor the pressure value (vacuum or gas pressure) in the chamber in real time. The pressure is displayed on the dial or transmitted to the external control system via an electrical signal, and feedback is given to the operator to provide accurate pressure reference for vacuuming and gas filling operations, avoiding chamber sealing failure due to excessive pressure or insufficient atmosphere replacement due to excessively low pressure.

[0036] In practical applications, the working principle of the grinding jar of this application can be as follows: When vacuuming the grinding jar, the locking components must first be installed in the mounting holes 101 on the circumferential direction of the jar body 11 and the cover 12 to achieve a tight seal between the cover 12 and the jar body 11. Then, the connecting pipe of the vacuum device is installed on the connection part 322 of the first control valve 20. Rotating the drive component 33 on the first control valve 20 separates the sealing part 321 of its valve core 32 from the valve port of the valve body 31, forming a 0.5mm-2mm conduction gap. At this time, the first passage 301 is connected to the second passage 302 through this conduction gap, forming a complete vacuum passage. Start the vacuum equipment, and the air, moisture and residual gas in the grinding chamber are discharged through the vacuum passage. The operator observes the change in vacuum degree in real time through the pressure monitor. When the vacuum degree reaches the preset value, keep the vacuum equipment running for 3-5 minutes to ensure that the residual gas in the chamber is fully discharged. Finally, the drive component 33 of the first control valve 20 is rotated in the reverse direction, so that the sealing part 321 of the valve core 32 fits tightly with the valve port, cutting off the vacuum passage, shutting off the vacuum equipment, and disconnecting the connecting pipe. At this time, the grinding chamber maintains a vacuum state.

[0037] When it is necessary to fill the grinding jar with protective gas, first evacuate the grinding chamber according to the vacuuming steps described above. After the grinding chamber is in a vacuum state, install the external gas source connection pipe on the connection part 322 of the second control valve 30. Then operate the second control valve 30. Specifically, rotate the drive component 33 on the second control valve 30 to connect the first passage 301 and the second passage 302 within the second control valve 30, forming a complete air intake passage. Start the external gas source to fill the protective gas. After the pressure in the grinding chamber is monitored by the pressure monitor to reach the preset value, turn off the external gas source and rotate the drive component 33 on the second control valve 30 in the reverse direction to cut off the air intake passage, completing a single filling. Finally, repeat the above "vacuuming-filling" steps 2 to 3 times. Through multiple replacements, the content of residual air components in the chamber is reduced to below the preset threshold, ultimately forming a stable protective gas atmosphere environment in the grinding chamber. It should be noted that the vacuuming equipment and external gas source mentioned above are existing mature technologies and will not be elaborated here.

[0038] Compared to existing technologies, the advantages of this invention are as follows: By setting a control component on the cover, the grinding chamber formed by the combination of the tank and the cover is evacuated and filled with protective gas, creating a stable and controllable atmosphere within the grinding chamber. This meets the processing requirements of high-precision, high-purity materials, improving the applicability of the ball mill jar. Furthermore, through the design of the shape of the second passage inside the first and second control valves, a directional airflow is formed when it is connected to the first passage. Combined with the cooperation between the sealing part and the valve port, the channel through which material is sucked out is completely blocked, avoiding material loss and passage blockage. This ensures the grinding effect, reduces equipment maintenance costs, and solves the problem of material backflow that is prone to occur with traditional control valves.

[0039] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A ball mill jar, characterized in that, It includes a tank and a cover that fits onto the tank, wherein the cover and the tank together form a grinding chamber; The cover is provided with a control component, the control component including: At least one vacuum port extends through the cover and communicates with the grinding chamber for connecting a vacuum device to expel gas from the grinding chamber; At least one air inlet port extends through the cover and communicates with the grinding chamber for connecting an external air source to fill the grinding chamber with protective gas; The vacuum port and the air inlet port are respectively equipped with a first control valve and a second control valve for controlling their on / off states.

2. The ball mill jar according to claim 1, characterized in that, Both the first control valve and the second control valve have a first passage and a second passage that is selectively connected to the first passage. The first passage is connected to the vacuum port or the air inlet port, and the second passage is used to connect to the vacuum equipment or the external air source.

3. The ball mill jar according to claim 2, characterized in that, The first passage is arranged along the axial direction of the vacuum port or the air inlet port, and the second passage is an L-shaped or inverted T-shaped structure.

4. The ball mill jar according to claim 3, characterized in that, Both the first control valve and the second control valve are shut-off valves, which include: The valve body is fixedly mounted on the cover, and the valve body is provided with the first passage. A valve core is axially movable within the valve body, and the valve core contains the second passage. A driving component, one end of which is fixedly connected to the valve core, and the other end of which is threadedly connected to the valve body; The valve core has a sealing part at one end, and the valve body has a valve port that cooperates with the sealing part. By rotating the driving member, the valve core can be driven to move axially relative to the valve body, so that the sealing part is in contact with or separates from the valve port, thereby realizing the disconnection or connection between the first passage and the second passage.

5. The ball mill jar according to claim 4, characterized in that, The mating surface between the sealing part and the valve port is a spherical sealing structure or a conical sealing structure.

6. The ball mill jar according to claim 4, characterized in that, The other end of the valve core is provided with a connecting part, and the peripheral surface of the connecting part is provided with a plurality of connecting protrusions. The plurality of connecting protrusions are spaced apart along the axial direction of the valve core. The connecting part is used to connect the connecting pipe of the vacuum device or an external air source.

7. The ball mill jar according to claim 4, characterized in that, At least two valve core sealing rings are provided between the circumferential surface of the valve core and the inner wall of the valve body, and a plurality of valve core sealing rings are spaced apart along the axial direction of the valve core.

8. The ball mill jar according to claim 1, characterized in that, The ball mill jar also includes a sealing assembly, which includes an annular sealing groove disposed on the top end face of the jar body or the bottom end face of the cover body, and an end face sealing ring embedded in the annular sealing groove.

9. The ball mill jar according to claim 1, characterized in that, The can body and the cover body are connected by a plurality of locking components, which are evenly distributed around the circumference of the can body.

10. The ball mill jar according to claim 1, characterized in that, The control component also includes a pressure monitor, which is mounted on the cover and communicates with the grinding chamber.

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