Pressure relief protection valve for ball milling barrel
By setting up air inlets, ventilation channels and air outlets in the ball mill barrel and using the airflow in the opposite direction of the raw material movement, the problem of seal failure under high temperature and high pressure in the ball mill barrel is solved, and the protection of the seals and the stability of the raw material ratio are achieved.
Patent Information
- Application Number
- CN202422707710.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-07
AI Technical Summary
During the wet grinding process, the high temperature and high pressure in the ball mill barrel cause the seals to fail, resulting in raw material leakage and changes in the ratio.
A ball mill barrel pressure relief protection valve is designed. By setting an air inlet, ventilation channel and air outlet in the ball mill barrel, the gas flow direction is opposite to the raw material movement direction, forming multiple bends to prevent the raw material from flowing out, and at the same time protecting the seal by exhausting the pressure reduction.
Effectively reduce pressure to protect seals, prevent seal damage, avoid raw materials from flowing out, and maintain a stable raw material ratio.
Smart Images
Figure CN223375192U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure relief valves, in particular to a ball mill barrel pressure relief protection valve. Background Art
[0002] Ball milling is a crucial step in powder metallurgy. Metal powders and cermet powders with varying properties and proportions are mixed together in a ball mill for thorough mixing. The mixed powders are then pressed and sintered to create a cemented carbide product that meets specific requirements. To prevent overheating and oxidation, solvents such as alcohol are often added to the mill, a process known as wet milling. During wet milling, the constant friction between the metal balls and the raw material generates significant heat, vaporizing the alcohol. The pressure within the mill often reaches around 4 or 5 atmospheres. This constant high temperature and pressure exposes the mill to the same high temperature and pressure, exposing the seals to these conditions. Over time, these seals can fail, leading to material leakage and unnecessary waste. Utility Model Content
[0003] The utility model provides a ball mill barrel pressure relief protection valve, which is used to solve the problem that the ball mill barrel may fail to function due to high temperature and high pressure during wet grinding.
[0004] The utility model provides a ball mill barrel pressure relief protection valve, comprising a valve body detachably connected to the barrel mouth of the ball mill barrel, an air inlet is provided on the outer wall of the valve body located in the ball mill barrel, an air outlet is provided at the middle position of the valve body, the air inlet and the air outlet are connected through a plurality of ventilation channels, the ventilation channels are arranged along the length direction of the ball mill barrel, and the two ends of the ventilation channel are respectively an air inlet end and an air outlet end.
[0005] Preferably, the outer contour of the valve body located in the ball mill barrel gradually decreases from the barrel mouth to the barrel bottom, and the air inlet is provided at one end of the valve body close to the barrel mouth.
[0006] Preferably, a first isolation ring is provided in the valve body, wherein one of the ventilation channels is distributed between the first isolation ring and the outer shell of the valve body, and the diameter of the first isolation ring gradually increases from the barrel mouth to the barrel bottom.
[0007] Preferably, a second isolation ring is provided in the valve body, wherein one of the ventilation channels is distributed between the first isolation ring and the second isolation ring, and the diameter of the second isolation ring gradually decreases from the barrel mouth to the barrel bottom.
[0008] Preferably, a third isolation ring is provided in the valve body, wherein one of the ventilation channels is distributed between the first isolation ring and the second isolation ring, and the air inlet is provided at one end of the third isolation ring.
[0009] Preferably, the third isolation ring is coaxially arranged with the ball mill barrel.
[0010] Preferably, the distance between the second isolation ring and the outer shell of the valve body gradually decreases from the barrel mouth to the barrel bottom.
[0011] Preferably, a mounting plate is provided on the valve body, and the mounting plate is fixed to the ball mill barrel by bolts.
[0012] Preferably, there are multiple air inlets, and the multiple air inlets are evenly distributed on the outer shell of the valve body.
[0013] Compared with the prior art, in the present invention, the excess gas in the ball mill barrel flows from the outside to the inside through the air inlet, while the raw materials in the ball mill barrel move from the inside to the outside under the action of centrifugal force. The two flow directions are opposite, so while exhausting the air, the raw materials can be effectively prevented from flowing out. Secondly, the design of the ventilation channel forms multiple bends in the air path between the inlet and outlet to the air outlet, which further increases the difficulty of raw materials flowing out. The valve body of the present invention has a simple structure and reduces the pressure on the ball mill barrel by exhausting air, which helps protect the seal from damage; at the same time, it can effectively control the raw materials from flowing out, avoiding changes in the raw material ratio. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0015] Figure 1 It is a structural diagram of the utility model;
[0016] Figure 2 It is a left view of the utility model;
[0017] Figure 3 for Figure 1 A magnified schematic diagram of the structure at center A.
[0018] Reference numerals:
[0019] 1. Ball mill barrel, 2. Valve body, 3. Bolts, 21. Air inlet, 22. Air outlet, 23. Ventilation channel, 24. First isolation ring, 25. Second isolation ring, 26. Third isolation ring, 27. Mounting plate, 28. Housing. DETAILED DESCRIPTION
[0020] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0021] Refer to the attached Figure 1 and attached Figure 3 This embodiment provides a ball mill barrel pressure relief valve, comprising a valve body 2 detachably connected to the barrel opening of the ball mill barrel 1. An air inlet 21 is provided on the outer wall of the valve body 2 located within the ball mill barrel 1, and an air outlet 22 is provided in the middle of the valve body 2. The air inlet 21 and the air outlet 22 are connected by a plurality of ventilation channels 23. The ventilation channels 23 are arranged along the length of the ball mill barrel 1 and are sequentially distributed from the inside to the outside. The two ends of the ventilation channels 23 are the air inlet end and the air outlet end, respectively. This structural design provides the air path from the air inlet 21 to the air outlet 22 with multiple bends. In the present utility model, the air inlet 21 and the ventilation channels 23 are both located outside the air outlet 22. During the rotation of the ball mill barrel 1, the raw material is subjected to centrifugal force, causing the raw material in the air inlet and the ventilation channels 23 to be thrown toward the inner wall of the ball mill barrel 1. During the process of excess gas in the ball mill barrel 1 flowing from the air inlet 21 to the air outlet 22, the raw material is not easily discharged. Secondly, the curved design of the air path from the air inlet 21 to the air outlet 22 also makes it more difficult for the raw materials to escape. The present invention has a simple structure. The coordination of the air inlet 21, ventilation channel 23, and air outlet 22 addresses the high pressure situation in the ball mill barrel 1, protecting the seal from damage while effectively controlling the raw materials from escaping and preventing changes in the raw material ratio. It should be noted that the direction from inside to outside is the direction from the axis of the ball mill barrel 1 to the barrel body.
[0022] In another embodiment of the present invention, the outer contour of the valve body 2 within the ball mill barrel 1 gradually decreases from the barrel opening to the barrel bottom. An air inlet 21 is located at the end of the valve body 2 near the barrel opening. The ball mill barrel 1 is arranged horizontally, and the air inlet 21 on the lower side of the ball mill barrel 1 is buried within the raw material. This position of the air inlet 21 on the lower side of the valve body 2 makes it difficult for the raw material to flow upward. This structural design effectively reduces the flow of raw material.
[0023] In another embodiment of the present invention, a first isolation ring 24 is provided within the valve body 2. A ventilation channel 23 is located between the first isolation ring 24 and the outer shell 28 of the valve body 2. The diameter of the first isolation ring 24 gradually increases from the barrel opening to the barrel bottom. The lower end of the first isolation ring 24, located on the underside of the ball mill barrel 1, faces the barrel bottom. The direction in which the raw material flows along the first isolation ring 24 is opposite to the direction of the airflow. This structural design further complicates the escape of the raw material.
[0024] In another embodiment of the present invention, a second isolation ring 25 is provided within the valve body 2. A ventilation channel 23 is located between the first isolation ring 24 and the second isolation ring 25. The diameter of the second isolation ring 25 gradually decreases from the barrel opening to the barrel bottom. The lower end of the second isolation ring 25, located on the underside of the ball mill barrel 1, faces the barrel opening. The direction in which the raw material flows along the second isolation ring 25 is opposite to the direction of airflow. This structural design further complicates the escape of the raw material.
[0025] As another embodiment of the present invention, a third isolation ring 26 is provided in the valve body 2 , wherein one ventilation channel 23 is distributed between the first isolation ring 24 and the second isolation ring 25 , and the air inlet 21 is provided at one end of the third isolation ring 26 .
[0026] As another embodiment of the present invention: the third isolation ring 26 is coaxially arranged with the ball mill barrel 1 .
[0027] As another embodiment of the present invention, the distance between the second isolation ring 25 and the outer shell 28 of the valve body 2 gradually decreases from the barrel mouth to the barrel bottom.
[0028] As another embodiment of the present invention: Figure 2 A mounting plate 27 is provided on the valve body 2, and the mounting plate 27 is fixed to the ball mill barrel 1 by bolts 3. This structural design makes it easy to disassemble the valve body 2 and load and unload raw materials.
[0029] As another embodiment of the present invention, there are multiple air inlets 21, which are evenly distributed on the outer shell 28 of the valve body 2. The aperture of the air inlet 21 is smaller than the aperture of the air outlet 22. Multiple air inlets 21 can effectively improve exhaust efficiency, and providing smaller air inlets 21 can effectively prevent raw materials from flowing into the valve body 2.
[0030] In the present invention, the excess gas in the ball mill barrel 1 flows from the outside to the inside through the air inlet 21, while the raw materials in the ball mill barrel 1 move from the inside to the outside under the action of centrifugal force. The flow directions of the two are opposite, so the raw materials can be effectively prevented from flowing out while the air is exhausted. Secondly, the design of the ventilation channel 23 forms multiple bends in the air path between the inlet and outlet to the air outlet 22, which further increases the difficulty of the raw materials flowing out. The valve body 2 of the present invention has a simple structure and reduces the pressure on the ball mill barrel 1 by exhausting air, which is beneficial to protect the seal from damage; at the same time, it can effectively control the raw materials from flowing out, avoiding changes in the raw material ratio.
[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A ball mill barrel pressure relief protection valve, characterized in that: It includes a valve body that is detachably connected to the barrel mouth of the ball mill barrel, an air inlet is provided on the outer wall of the valve body located in the ball mill barrel, and an air outlet is provided at the middle position of the valve body. The air inlet and the air outlet are connected through multiple ventilation channels. The ventilation channels are arranged along the length direction of the ball mill barrel, and the two ends of the ventilation channels are respectively the air inlet end and the air outlet end.
2. The ball mill barrel pressure relief protection valve according to claim 1, characterized in that: The outer contour of the valve body located in the ball mill barrel gradually decreases from the barrel mouth to the barrel bottom, and the air inlet is arranged at one end of the valve body close to the barrel mouth.
3. The ball mill barrel pressure relief protection valve according to claim 2, characterized in that: A first isolation ring is provided in the valve body, wherein one of the ventilation channels is distributed between the first isolation ring and the outer shell of the valve body, and the diameter of the first isolation ring gradually increases from the barrel mouth to the barrel bottom.
4. The ball mill barrel pressure relief protection valve according to claim 3, characterized in that: A second isolation ring is provided in the valve body, wherein one of the ventilation channels is distributed between the first isolation ring and the second isolation ring, and the diameter of the second isolation ring gradually decreases from the barrel mouth to the barrel bottom.
5. The ball mill barrel pressure relief protection valve according to claim 4, characterized in that: A third isolation ring is provided in the valve body, wherein one of the ventilation channels is distributed between the first isolation ring and the second isolation ring, and the air inlet is provided at one end of the third isolation ring.
6. The ball mill barrel pressure relief protection valve according to claim 5, characterized in that: The third isolation ring is coaxially arranged with the ball mill barrel.
7. The ball mill barrel pressure relief protection valve according to claim 6, characterized in that: The distance between the second isolation ring and the outer shell of the valve body gradually decreases from the barrel mouth to the barrel bottom.
8. The ball mill barrel pressure relief protection valve according to claim 1, characterized in that: The valve body is provided with a mounting plate, and the mounting plate is fixed to the ball mill barrel by bolts.
9. The ball mill barrel pressure relief protection valve according to claim 3, characterized in that: There are multiple air inlets, and the multiple air inlets are evenly distributed on the outer shell of the valve body.