Low-temperature pressure-limiting ball milling tank

Abstract

The utility model discloses a low-temperature pressure-limiting ball milling tank which comprises a tank body and a tank cover which are mutually closed and buckled, the tank body comprises a shell and a hollow inner container, the tank cover is provided with a pressure release valve which is communicated with an air channel of the inner container, and a pressure release channel of the pressure release valve is internally provided with a filter membrane which is used for blocking materials and preventing the materials from being discharged. The low-temperature pressure-limiting ball milling tank disclosed by the utility model has the characteristics of timely pressure adjustment, low material leakage risk and simple structure.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment technology, specifically to a low-temperature pressure-limiting ball mill jar. Background Technology

[0002] Ball milling is a commonly used grinding method. During ball milling, the grinding balls in the milling chamber move at high speed due to the shaking of the instrument, thereby impacting, squeezing, and rubbing the material to achieve pulverization. After being subjected to high-frequency impacts, the material breaks into small pieces, thus achieving fine pulverization of the sample.

[0003] During ball milling, friction generates a large amount of heat. Over time, this heat buildup can alter the properties of certain materials. Simultaneously, the gas medium in the enclosed space expands, increasing the air pressure in the ball mill chamber. This further increases the risk of material deterioration and the inherent dangers of ball milling.

[0004] Currently, common methods for controlling ball mill temperature include pre-cooling the mill jar before milling and introducing refrigerant gas into the working area. However, these methods suffer from drawbacks such as low cooling efficiency and sample contamination. Pressure control in ball mills is typically achieved using a pressure relief valve, but this method has limitations such as unadjustable pressure and material leakage. Utility Model Content

[0005] The purpose of this invention is to provide a low-temperature pressure-limiting ball mill jar, which features timely pressure adjustment, low risk of material leakage, and simple structure.

[0006] This utility model can be achieved through the following technical solutions:

[0007] This utility model discloses a low-temperature pressure-limiting ball mill jar, including a jar body and a jar cover that are sealed and interlocked with each other. The jar body includes an outer shell and a hollow inner liner. The jar cover is provided with a pressure relief valve that is connected to the air passage of the inner liner. The pressure relief valve is provided with a filter membrane in the pressure relief channel to block the material and prevent leakage.

[0008] Furthermore, a space for storing refrigerant is provided between the outer shell and the inner liner, and the space is provided with vent holes.

[0009] Furthermore, the bottom inner wall of the outer shell is provided with a fixing groove, and the bottom outer wall of the inner liner is provided with a fixing post corresponding to the fixing groove.

[0010] Furthermore, the can lid is equipped with a connector, and the pressure relief valve is connected to the connector via a thread.

[0011] Furthermore, the opening of the inner liner is provided with a step, and the step is connected to the inner wall of the outer shell opening by a thread.

[0012] Furthermore, a sealing ring is provided at the contact point between the tank body and the tank lid.

[0013] Furthermore, the diameter of the filter membrane is consistent with the outer diameter of the connector. During assembly, the filter membrane is placed flat on the connector, and the pressure relief valve is screwed in to fix the filter membrane.

[0014] Furthermore, the outer ring of the can lid is provided with multiple fixing through holes for screw locking the can lid to the can body.

[0015] Furthermore, the pressure relief valve includes a valve body and a valve cover, with a threaded connection between the valve body and the valve cover forming a movable space. The piston and spring abut against each other and are disposed inside the movable space.

[0016] Furthermore, a rubber sealing ring is provided at the contact point between the lower end of the piston and the valve body, and the valve body is provided with an exhaust port that connects to the atmosphere.

[0017] This utility model discloses a low-temperature pressure-limiting ball mill jar, which has the following beneficial effects:

[0018] This invention relates to a ball mill jar equipped with a pressure relief valve and a filter membrane. The pressure relief pressure can be set by adjusting the valve cover. A channel connecting the pressure relief valve to the ball mill chamber is located at the bottom of the valve. When the pressure inside the jar exceeds the pressure relief pressure during ball milling, it pushes the piston inside the valve upwards to the upper part of the vent hole, allowing gas to escape. When the pressure inside the jar drops to the pressure relief pressure, the piston moves downwards to close the vent hole due to the spring force. Furthermore, a filter membrane is installed at the pressure relief valve channel to effectively prevent low-particle-size materials from being ejected with the vented gas.

[0019] This grinding jar has a jacket inside. By adding a low-temperature medium inside, the temperature of the ball-milled material can be effectively reduced, while also preventing the material from directly contacting and reacting with the low-temperature medium. Attached Figure Description

[0020] Figure 1 This is an overall cross-sectional view of a low-temperature pressure-limiting ball mill jar according to the present invention;

[0021] Figure 2 This is an enlarged cross-sectional view of a low-temperature pressure-limiting ball mill jar pressure relief valve according to the present invention;

[0022] The markings in the attached diagram include: 1-outer shell, 2-inner liner, 3-inner liner step, 4-sealing ring, 5-filter membrane, 6-piston, 7-spring, 8-valve cover, 9-inner liner fixing post, 10-can lid, 11-can lid connector, 12-sealing ring, 13-valve body, 14-fixing screw. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the product of this utility model will be further described in detail below with reference to embodiments.

[0024] like Figure 1The diagram shows a cross-sectional view of the assembled low-temperature pressure-limiting ball mill jar. The outer shell 1 and inner liner 2 are cylindrical. The upper outer side of the inner liner 2 is provided with a step 3, and the outer side of the step 3 is provided with an external thread. The inner wall of the opening of the outer shell 1 is provided with an internal thread, and the outer shell 1 and the inner liner 2 are threaded together. The bottom outer wall of the inner liner 2 is provided with a fixing post 9, which is embedded in the groove of the outer shell 1 for reinforcement. The jar lid 10 and the outer shell 1 are connected by screws 14. There is a washer 4 on the contact surface between the jar lid 10 and the inner liner 2. The jar lid 10 is provided with a connector 11. A filter membrane 5 can be laid on the upper end of the connector 11. The outer side of the connector 11 is provided with an external thread, which can be used to fix the pressure relief valve by engaging with the lower thread of the pressure relief valve, and at the same time, the filter membrane 5 can be fixed in the channel.

[0025] like Figure 2 As shown, this is a cross-section of the assembled pressure relief valve. The valve cover 8 and the valve body 13 are connected by threads to form a movable space. The valve body 13 has four horizontal exhaust holes in the middle and an air intake channel at the lower end. The piston 6 and the spring 7 move against each other and are located inside the movable space between the valve body 13 and the valve cover 8. A rubber sealing ring is provided at the contact point between the lower end of the piston 6 and the valve body 13.

[0026] Preferably, the outer shell 1 and the lid 10 of the tank are made of zirconium oxide ceramic or titanium alloy; the inner liner 2, the pressure relief valve body 13, the valve cover 8, and the piston 6 are made of polytetrafluoroethylene; and the filter membrane 5 is made of Tangfeng 1201 filter cotton, which is appropriately cut.

[0027] Preferably, the thickness of the can lid 10 and the outer shell 1 of the can is the same, which is 5-7 mm, and the thickness of the inner liner of the can is 4-5 mm.

[0028] Preferably, the outer shell of the tank has a height of 12–15 cm and an outer diameter of 10–11 cm. The inner liner has a height of 7–8 cm and an outer diameter of 6–7 cm.

[0029] The length of the pressure relief valve body 13 shall not exceed 5cm, and the diameter of its connection with the tank cover shall be 4-5mm.

[0030] The usage method of this low-pressure ball mill jar is as follows:

[0031] Assemble the pressure relief valve.

[0032] Place the diaphragm at the connector port and secure the tank cover to the pressure relief valve. Adjust the tightness of the valve cover according to the needs of the ball mill.

[0033] A cryogenic medium is laid in the interlayer between the inner liner and the outer shell to fix the inner liner and the outer shell. The cryogenic medium is a solid, such as dry ice.

[0034] Add the sample to be crushed and the grinding balls into the inner liner, then put on the lid and fix the lid to the liner. Place the grinding liner into the ball mill to start grinding.

[0035] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The above embodiments are merely specific examples of this utility model, and their descriptions are quite specific and detailed, but 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 several modifications and improvements without departing from the concept of this utility model, and these obvious substitutions all fall within the protection scope of this utility model.

Claims

1. A low-temperature pressure-limiting ball mill jar, comprising a jar body and a jar lid that are sealed and interlocked, characterized in that: The tank body includes an outer shell and a hollow inner liner. The tank cover is provided with a pressure relief valve that is connected to the air passage of the inner liner. The pressure relief valve is provided with a filter membrane in the pressure relief channel to block material and prevent leakage.

2. The low-temperature pressure-limiting ball mill jar according to claim 1, characterized in that: A spacer for storing refrigerant is provided between the outer shell and the inner liner, and the spacer is provided with vent holes.

3. The low-temperature pressure-limiting ball mill jar according to claim 2, characterized in that: The bottom inner wall of the outer shell is provided with a fixing groove, and the bottom outer wall of the inner liner is provided with a fixing post corresponding to the fixing groove.

4. The low-temperature pressure-limiting ball mill jar according to claim 3, characterized in that: The can lid is equipped with a connector, and the pressure relief valve is connected to the connector via a thread.

5. The low-temperature pressure-limiting ball mill jar according to claim 4, characterized in that: The opening of the inner liner is provided with a step, and the step is connected to the inner wall of the outer shell opening by a thread.

6. The low-temperature pressure-limiting ball mill jar according to claim 5, characterized in that: A sealing ring is provided at the contact point between the tank body and the tank lid.

7. The low-temperature pressure-limiting ball mill jar according to claim 6, characterized in that: The diameter of the filter membrane is the same as the outer diameter of the connector. During assembly, place the filter membrane flat on the connector and screw in the pressure relief valve to fix the filter membrane.

8. The low-temperature pressure-limiting ball mill jar according to claim 7, characterized in that: The outer ring of the can lid is provided with multiple fixing through holes for screwing the can lid to the can body.

9. The low-temperature pressure-limiting ball mill jar according to claim 8, characterized in that: The pressure relief valve includes a valve body and a valve cover, which are connected by threads to form a movable space. A piston and a spring move against each other and are disposed inside the movable space.

10. The low-temperature pressure-limiting ball mill jar according to claim 9, characterized in that: A rubber sealing ring is provided at the contact point between the lower end of the piston and the valve body, and the valve body is provided with an exhaust port that connects to the atmosphere.

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