Blender for silicon nitride production
By designing a mixer with multi-directional stirring and nitrogen delivery, the problems of material agglomeration and adhesion in traditional mixers were solved, improving the mixing efficiency and quality of silicon nitride.
Patent Information
- Application Number
- CN202422737702.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-11
AI Technical Summary
Traditional mixers tend to cause material agglomeration during the mixing process, resulting in uneven mixing, which affects the purity and performance of silicon nitride. In addition, the mixing time is long and the efficiency is low, and the material tends to adhere to the inner wall and is difficult to completely discharge.
A mixer was designed, comprising a mixing tank, a cover plate, a drive motor, a rotating shaft, a mixing assembly, and a gas supply assembly. The mixer uses spiral mixing blades and multiple sets of mixing rods to perform multi-directional stirring, and uses the gas supply assembly to deliver nitrogen into the mixing tank. Combined with a vibration generator, it ensures uniform mixing and sealing.
This process ensures thorough mixing of silicon nitride raw materials, improves production efficiency and quality, reduces material adhesion, and guarantees the uniformity and complete discharge of silicon nitride.
Smart Images
Figure CN223530264U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mixing device technology, and in particular to a mixer for silicon nitride production. Background Technology
[0002] Silicon nitride, as an important high-temperature structural ceramic material, has wide applications in aerospace, automotive engines, machining, and many other fields. The production of silicon nitride requires thorough and uniform mixing of silicon powder and nitrogen source. However, traditional mixers often employ simple stirring structures, which easily lead to material agglomeration during stirring. This prevents some material from effectively participating in the mixing, affecting the purity and performance of the final silicon nitride. Furthermore, the fixed stirring method results in long mixing times, low production efficiency, and increased production costs. Additionally, during stirring and discharging, silicon nitride material may adhere to the inner wall of the stirring device, preventing thorough and uniform mixing and complete discharge. Therefore, a mixing device that solves these problems is needed. Utility Model Content
[0003] To address the problems of traditional mixers that often employ simple stirring structures, which easily lead to material agglomeration during stirring and prevent some materials from effectively participating in the mixing process, thus affecting the purity and performance of the final silicon nitride, and the fixed stirring method resulting in long mixing time, low production efficiency, and increased production costs, as well as the problem of silicon nitride material adhering to the inner wall of the stirring device during stirring and discharging, preventing sufficient and uniform mixing and complete discharge, a new mixer for silicon nitride production has been invented.
[0004] The technical solution of this utility model is a mixer for silicon nitride production, including a mixing tank and a cover plate sealed and fixed to the opening of the mixing tank. A drive motor is connected to the cover plate, and a rotating shaft is connected to the drive motor. One end of the rotating shaft extends through the cover plate into the mixing tank. A mixing component is connected to the rotating shaft inside the mixing tank. An air supply component connected to an air supply hole inside the rotating shaft is connected to the cover plate. The air supply hole is connected to a portion of the mixing component. An air outlet is provided on the rotating shaft, communicating with the air supply hole. Several mixing protrusions are connected to the inner wall of the mixing tank, and a vibration generator is connected to the outer wall of the mixing tank.
[0005] Preferably, the mixing assembly includes a spiral mixing blade and multiple sets of mixing rods. Each set of mixing rods has several rods that are evenly connected in a ring on a rotating shaft. The spiral mixing blades are connected to the rotating shaft below the mixing rods and close to the bottom of the mixing tank.
[0006] Preferably, the mixing rod has a connecting hole inside, and the lower end face of the mixing rod has an exhaust hole that communicates with the connecting hole.
[0007] Preferably, the gas delivery assembly includes a gas delivery seat and a gas delivery head. The gas delivery seat is connected to the cover plate. A through hole is provided on the gas delivery seat. A first snap-fit ring groove and a second snap-fit ring groove are provided on the inner wall of the through hole. A corresponding third snap-fit ring groove and a fourth snap-fit ring groove are provided on the rotating shaft. A first sealing ring is snapped in the first snap-fit ring groove and the third snap-fit ring groove. A second sealing ring is snapped in the second snap-fit ring groove and the fourth snap-fit ring groove. A gas delivery ring groove is provided on the rotating shaft between the third snap-fit ring groove and the fourth snap-fit ring groove. An air inlet is provided in the gas delivery ring groove, which communicates with the gas delivery hole inside the rotating shaft. A gas supply hole is provided on the gas delivery seat, which communicates with the gas delivery ring groove. The gas delivery head is connected to the gas supply hole and is connected to a nitrogen source.
[0008] Preferably, a fifth snap-fit ring groove is provided on the end face of the gas supply seat that contacts the cover plate, and a corresponding sixth snap-fit ring groove is provided on the cover plate. A third sealing ring is snapped into the fifth snap-fit ring groove and the sixth snap-fit ring groove.
[0009] Preferably, the cover plate is connected to a feeding channel, the opening of the feeding channel is threadedly sealed with a sealing cap, the bottom of the mixing tank is connected to a discharge channel, and the bottom of the mixing tank is connected to several support legs.
[0010] Preferably, a plurality of support rods are connected to the cover plate, and a fixing ring is connected to the end of the support rod away from the cover plate, and the drive motor is connected to the fixing ring.
[0011] The technical solution of this utility model can achieve the following beneficial effects: (1) Through the mixing component, it is convenient to fully mix and stir the silicon nitride raw material from the direction of the material and the vertical direction through various stirring methods, thereby improving the mixing efficiency; (2) Through the gas conveying component, nitrogen gas is conveyed into the mixing tank without affecting the rotation of the rotating shaft, ensuring the sealing state inside the mixing tank, facilitating the production of silicon nitride, and improving the production quality of silicon nitride; The technical solution of this utility model has a wide application prospect in the field of mixing device technology. Attached Figure Description
[0012] Figure 1 This is a cross-sectional view of the mixer for silicon nitride production according to this utility model.
[0013] Figure 2 for Figure 1 Enlarged view of a portion of region A in the middle.
[0014] Figure 3 for Figure 1 Enlarged view of a portion of region B in the middle.
[0015] The components are as follows: 1. Mixing tank; 2. Cover plate; 3. Feeding channel; 4. Sealing cover; 5. Support rod; 6. Fixing ring; 7. Drive motor; 8. Rotating shaft; 9. Air supply seat; 10. Sixth snap-fit ring groove; 11. Fifth snap-fit ring groove; 12. Third sealing ring; 13. First snap-fit ring groove; 14. Third snap-fit ring groove; 15. First sealing ring; 16. Second snap-fit ring groove; 17. Fourth snap-fit ring groove; 18. Second sealing ring; 19. Air supply ring groove; 20. Air inlet; 21. Air supply hole; 22. Air supply head; 23. Air supply hole; 24. Support bearing; 25. Spiral mixing blades; 26. Mixing rod; 27. Connecting hole; 28. Exhaust hole; 29. Air outlet; 30. Discharge channel; 31. Support leg; 32. Mixing protrusion; 33. Vibration generator. Detailed Implementation
[0016] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model.
[0017] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0018] This application discloses a mixer for silicon nitride production. (See also...) Figure 1The system includes a mixing tank 1 and a cover plate 2 that is detachably and sealed to the opening of the mixing tank 1 with bolts, facilitating the mixing of silicon powder and a nitrogen source to form silicon nitride. A drive motor 7 is connected to the cover plate 2, providing power for the mixing of silicon powder and nitrogen source within the mixing tank 1. Specifically, several support rods 5 are detachably and fixedly connected to the cover plate 2 with bolts, one end of each support rod 5 being connected to the cover plate 2. A retaining ring 6 is welded to or detachably and fixedly connected with bolts to the end of each support rod 5 away from the cover plate 2, connecting the retaining ring 6 to the support rod 5 and then to the cover plate 2, thus supporting and confining the retaining ring 6 above the cover plate 2. The drive motor 7 is detachably and fixedly connected to the retaining ring 6 with bolts, further supporting and confining the drive motor 7 above the cover plate 2. The output shaft of the drive motor 7 is detachably and fixedly connected to the rotating shaft 8 via a coupling, so that when the drive motor 7 is powered on, its output shaft drives the rotating shaft 8 to rotate. One end of the rotating shaft 8 extends through the cover plate 2 into the mixing tank 1, and the rotating shaft 8 is connected to a mixing component inside the mixing tank 1, so that the rotation of the rotating shaft 8 drives the mixing component to rotate, thereby fully mixing the silicon powder and nitrogen source in the mixing tank 1.
[0019] Reference Figure 1 , Figure 3The mixing assembly includes spiral mixing blades 25 and multiple sets of mixing rods 26. Each set of mixing rods 26 consists of several rods welded together in a ring to a rotating shaft 8. This connection allows the rotating shaft 8 to rotate, driving the mixing rods 26 to rotate and thus thoroughly mixing the silicon powder and nitrogen source in the mixing tank 1 horizontally. The spiral mixing blades 25 are welded to the rotating shaft 8 below the mixing rods 26 and near the bottom of the mixing tank 1. This connection allows the spiral mixing blades 25 to rotate simultaneously with the rotating shaft 8, spirally stirring and conveying the silicon powder at the bottom of the mixing tank 1 upwards. The silicon powder is then further stirred horizontally by the mixing rods 26. Through the combined action of the mixing rods 26 and the spiral mixing blades 25, the silicon powder and nitrogen source in the mixing tank 1 are mixed more efficiently and uniformly, facilitating the uniform formation of silicon nitride and improving the production efficiency and quality of silicon nitride. A connecting hole 27 is provided inside the mixing rod 26, which is connected to the gas supply hole 23 inside the rotating shaft 8. An exhaust hole 28, connected to the connecting hole 27, is provided on the lower end face of the mixing rod 26. This allows nitrogen gas to enter the connecting hole 27 through the gas supply hole 23 and then exit through the exhaust hole 28. This ensures that the mixing rod 26 outputs nitrogen gas during the mixing of silicon powder, achieving thorough mixing of silicon powder and nitrogen gas, facilitating the formation of silicon nitride, and improving the production efficiency and quality of silicon nitride. An exhaust hole 29, connected to the gas supply hole 23, is provided at the lower end of the rotating shaft 8. The position of the exhaust hole 29 corresponds to that of the spiral mixing blades 25, allowing nitrogen gas to be discharged through the exhaust hole 29. While the spiral mixing blades 25 are mixing and conveying the silicon powder upwards, nitrogen gas can be discharged through the exhaust hole 29, further ensuring thorough mixing of nitrogen gas and silicon powder, facilitating the formation of silicon nitride, and improving the production efficiency and quality of silicon nitride.
[0020] Reference Figure 1 , Figure 2A gas delivery assembly is connected to the cover plate 2, which communicates with the gas delivery hole 23 inside the rotating shaft 8. This allows nitrogen gas to be delivered to the gas delivery hole 23 inside the rotating shaft 8 through the gas delivery assembly without affecting the normal rotation of the rotating shaft 8 or the sealing state inside the mixing tank 1. The gas delivery assembly includes a gas delivery seat 9 and a gas delivery head 22. The gas delivery seat 9 is detachably fixed to the cover plate 2 by bolts, connecting the gas delivery seat 9 and the cover plate 2 together, thereby detachably connecting the entire gas delivery assembly to the cover plate 2. A through hole is provided on the gas delivery seat 9, through which the rotating shaft 8 passes, allowing the rotating shaft 8 to extend into the mixing tank 1 without affecting the rotation of the rotating shaft 8 relative to the gas delivery seat 9. The inner wall of the through hole is provided with a first snap-fit ring groove 13 and a second snap-fit ring groove 16. The rotating shaft 8 is provided with a corresponding third snap-fit ring groove 14 and a fourth snap-fit ring groove 17. A first sealing ring 15 is snapped in the first snap-fit ring groove 13 and the third snap-fit ring groove 14, and a second sealing ring 18 is snapped in the second snap-fit ring groove 16 and the fourth snap-fit ring groove 17. The first sealing ring 15 and the second sealing ring 18 are sleeved on the rotating shaft 8, so that the first sealing ring 15 is limited by the first snap-fit ring groove 13 and the third snap-fit ring groove 14, and the second sealing ring 18 is limited by the second snap-fit ring groove 16 and the fourth snap-fit ring groove 17, so as to prevent the first sealing ring 15 and the second sealing ring 18 from detaching from the air supply seat 9 and the rotating shaft 8, and thus use the first sealing ring 15 and the second sealing ring 18 to seal the gap between the rotating shaft 8 and the air supply seat 9. A gas delivery ring groove 19 is provided on the rotating shaft 8 between the third locking ring groove 14 and the fourth locking ring groove 17. An air inlet 20 is provided in the gas delivery ring groove 19, which connects to the gas delivery hole 23 inside the rotating shaft 8. A gas supply hole 21 is provided on the gas delivery seat 9, which connects to the gas delivery ring groove 19. This ensures that the connection between the gas supply hole 21 and the air inlet 20 is not affected when the rotating shaft 8 rotates through the gas delivery ring groove 19. The gas delivery head 22 is connected to the gas supply hole 21 and is connected to a nitrogen source. The gas delivery head 22 delivers nitrogen from the nitrogen source to the gas supply hole 21, and then delivers it to the gas delivery hole 23 inside the rotating shaft 8 through the gas delivery ring groove 19 and the air inlet 20. A fifth locking ring groove 11 is provided on the end face of the gas supply seat 9 that contacts the cover plate 2, and a corresponding sixth locking ring groove 10 is provided on the cover plate 2. A third sealing ring 12 is engaged in the fifth locking ring groove 11 and the sixth locking ring groove 10, so that the third sealing ring 12 is engaged and limited by the fifth locking ring groove 11 and the sixth locking ring groove 10, preventing the third sealing ring 12 from detaching from the gas supply seat 9 and the cover plate 2. At the same time, the third sealing ring 12 seals the gap between the cover plate 2 and the gas supply seat 9, preventing air leakage from the gap between the cover plate 2 and the gas supply seat 9, thereby ensuring the airtightness of the mixing tank 1 without affecting the rotation of the rotating shaft 8. A support bearing 24 is detachably fixed to the gas supply seat 9 by bolts. The rotating shaft 8 is interference-fitted into the support bearing 24, so that the support bearing 24 supports and limits the rotating shaft 8 without affecting the rotation of the rotating shaft 8 relative to the gas supply seat 9.
[0021] Reference Figure 1 The inner wall of the mixing tank 1 is welded with several mixing protrusions 32. These protrusions push the silicon powder on the inner wall of the mixing tank 1 during the mixing process by the stirring assembly, thus ensuring thorough mixing throughout the mixing tank 1. A vibration generator 33 is detachably and fixedly connected to the outer wall of the mixing tank 1 by bolts. When the vibration generator 33 is energized, it generates vibration, which shakes and removes the silicon powder adhering to the inner wall of the mixing tank 1. This facilitates the complete discharge of the finished silicon nitride adhering to the inner wall of the mixing tank 1. Simultaneously, during the mixing process, the vibration of the silicon powder on the inner wall of the mixing tank 1 ensures thorough and uniform mixing of the silicon powder.
[0022] Reference Figure 1 The cover plate 2 is connected to a feed channel 3, which facilitates the addition of silicon nitride raw material silicon powder and some solid nitrogen source into the mixing tank 1. A sealing cap 4 is threadedly connected to the opening of the feed channel 3, ensuring the opening is sealed and maintaining the airtightness of the mixing tank 1 during mixing. A discharge channel 30 is connected to the bottom of the mixing tank 1, allowing the generated silicon nitride to be discharged from the mixing tank 1. Several support legs 31 are welded to or detachably fixed to the bottom of the mixing tank 1 with bolts, allowing the mixing tank 1 to stand stably on the ground.
[0023] In use, first open the sealing cover 4, and put silicon powder and solid nitrogen source into the mixing tank 1 through the feeding channel 3. Then, seal the sealing cover 4 in the feeding channel 3 with a screw. Next, turn on the drive motor 7. The output shaft of the drive motor 7 drives the rotating shaft 8 to rotate. The rotating shaft 8 drives the mixing rod 26 and the spiral mixing blade 25 in the mixing tank 1 to rotate. While the rotating shaft 8 is rotating, the nitrogen source can be delivered to the gas supply hole 21 through the gas delivery head 22 as needed. Then, it is delivered to the gas delivery hole 23 in the rotating shaft 8 through the gas delivery ring groove 19 and the gas inlet hole 20. Then, it is discharged into the silicon powder through the gas outlet hole 29 and the exhaust hole 28 as the spiral mixing blade 25 and the mixing rod 26 rotate, so as to achieve uniform mixing of silicon powder and nitrogen to form silicon nitride. After the reaction is complete, open the discharge channel 30 to discharge the silicon nitride in the mixing tank 1.
[0024] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components, and the structural settings, working methods or control methods involved are all conventional settings, working methods or control methods in the art unless otherwise specified.
[0025] The embodiments described above are merely illustrative 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 the 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 all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A mixer for silicon nitride production, comprising a mixing tank (1) and a cover plate (2) sealed and fixed to the opening of the mixing tank (1), wherein, A drive motor (7) is connected to the cover plate (2), and a rotating shaft (8) is connected to the drive motor (7). One end of the rotating shaft (8) extends through the cover plate (2) into the mixing tank (1). A mixing assembly is connected to the rotating shaft (8) inside the mixing tank (1). An air supply assembly is connected to the cover plate (2) and communicates with the air supply hole (23) inside the rotating shaft (8). The air supply hole (23) communicates with part of the mixing assembly. A communicating air supply hole (23) is provided on the rotating shaft (8). 3) The air outlet (29) of the mixing tank (1) is connected to a number of mixing protrusions (32), and the outer side wall of the mixing tank (1) is connected to a vibration generator (33); the mixing assembly includes a spiral mixing blade (25) and multiple sets of mixing rods (26). Each set of mixing rods (26) has several rods that are evenly connected in a ring on the rotating shaft (8). The spiral mixing blade (25) is connected to the rotating shaft (8) below the mixing rod (26) and close to the bottom of the mixing tank (1).
2. The mixer for silicon nitride production according to claim 1, characterized in that, The mixing rod (26) has a connecting hole (27) inside, and the lower end face of the mixing rod (26) has an exhaust hole (28) that communicates with the connecting hole (27).
3. The mixer for silicon nitride production according to claim 1, characterized in that, The gas delivery assembly includes a gas delivery seat (9) and a gas delivery head (22). The gas delivery seat (9) is connected to the cover plate (2). A through hole is provided on the gas delivery seat (9). A first locking ring groove (13) and a second locking ring groove (16) are provided on the inner wall of the through hole. A corresponding third locking ring groove (14) and a fourth locking ring groove (17) are provided on the rotating shaft (8). A first sealing ring (15) is locked in the first locking ring groove (13) and the third locking ring groove (14). The second locking ring groove (16) A second sealing ring (18) is engaged in the fourth locking ring groove (17). A gas supply ring groove (19) is provided on the rotating shaft (8) between the third locking ring groove (14) and the fourth locking ring groove (17). An air inlet (20) is provided in the gas supply ring groove (19) and communicates with the gas supply hole (23) in the rotating shaft (8). An air supply hole (21) is provided on the gas supply seat (9) and communicates with the gas supply ring groove (19). The gas supply head (22) is connected to the air supply hole (21) and is connected to a nitrogen source.
4. The mixer for silicon nitride production according to claim 3, characterized in that, The end face of the gas supply seat (9) that contacts the cover plate (2) is provided with a fifth snap ring groove (11), and the cover plate (2) is provided with a corresponding sixth snap ring groove (10). A third sealing ring (12) is snapped into the fifth snap ring groove (11) and the sixth snap ring groove (10).
5. The mixer for silicon nitride production according to claim 1, characterized in that, The cover plate (2) is connected to the feed channel (3), and the opening of the feed channel (3) is threadedly sealed with a sealing cover (4). The bottom of the mixing tank (1) is connected to the discharge channel (30), and the bottom of the mixing tank (1) is connected to several support legs (31).
6. The mixer for silicon nitride production according to claim 1, characterized in that, A plurality of support rods (5) are connected to the cover plate (2), and a fixing ring (6) is connected to one end of the support rod (5) away from the cover plate (2). The drive motor (7) is connected to the fixing ring (6).