Silicon carbide powder surface modification device
By combining the guide plate and distribution assembly with the stirring shaft, the problem of insufficient mixing of silicon carbide powder and modifier is solved, achieving efficient and uniform modification effect and improving modification efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGZHOU HENGTAI MICROPOWDER CO LTD
- Filing Date
- 2025-03-21
- Publication Date
- 2026-05-15
AI Technical Summary
Insufficient mixing of silicon carbide powder and modifier during feeding results in poor modification effect. Traditional feeding systems lack an effective dispersion mechanism, causing powder to quickly enter the modification area and form local accumulation, which limits the effective contact area with the modifier, resulting in incomplete or uneven modification process.
The design employs a guide plate and distribution assembly, combined with the rotation of the stirring shaft. Through the cooperation of the guide seat and multi-nozzle, it ensures that the silicon carbide powder is evenly dispersed and fully contacts the modifier. The design of the stirring blades and agitator blades promotes the mixing and diffusion of materials and avoids local accumulation.
This method achieves efficient and uniform contact between silicon carbide powder and modifier, improving modification efficiency and quality, avoiding localized powder accumulation, and ensuring the completeness and uniformity of the modification process.
Smart Images
Figure CN224236711U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of silicon carbide production equipment, specifically to a silicon carbide powder surface modification device. Background Technology
[0002] Silicon carbide is a high-performance ceramic material that has been widely used in many fields due to its excellent physicochemical properties.
[0003] The surface properties of silicon carbide powder directly affect its dispersibility, compatibility, and final performance in composite materials. Therefore, surface modification of silicon carbide powder to improve its application efficiency is particularly important. Traditional surface modification methods include physical and chemical methods, with chemical methods being widely used due to their ability to more precisely control the modification effect.
[0004] Currently, during the feeding process of surface modification treatment of silicon carbide, the mixing between silicon carbide powder and modifier is insufficient, resulting in poor modification effect. The reason for this is that the traditional feeding system lacks an effective dispersion mechanism. When silicon carbide powder enters the modification environment, it cannot be distributed quickly and evenly, thus limiting the effective contact area with the modifier. This leads to a large amount of powder rapidly entering the modification area and forming local accumulation, which hinders the full contact between the subsequent powder and the modifier, resulting in incomplete or uneven modification process. Utility Model Content
[0005] The purpose of this invention is to provide a silicon carbide powder surface modification device to solve the problem mentioned in the background art where insufficient mixing between silicon carbide powder and modifier during the feeding process leads to poor modification effect.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a silicon carbide powder surface modification device, comprising a tank, a stirring shaft inside the tank, a drive mechanism for rotating the stirring shaft at the top of the tank, feed pipes on both sides of the drive mechanism, and a guide plate located inside the tank connected to the upper end of the stirring shaft, a plurality of guide seats surrounding the guide plate, a guide port on the bottom wall of the guide plate corresponding to each guide seat, and a material distribution component installed at each guide port of the guide plate via a ring guide rail;
[0007] The material distribution assembly is an integrated structure consisting of a material distribution seat and a multi-nozzle nozzle.
[0008] Preferably, the guide seat has an overall trapezoidal structure and a guide port inside it, and the inner wall of the guide port inside the guide seat has an inclined downward structure.
[0009] Preferably, the guide plate is provided with a fixing ring sleeved on the stirring shaft, and the bottom end of the fixing ring is inserted with a fixing pin through a connecting ear, and the stirring shaft is provided with a through hole that matches the structure of the fixing pin.
[0010] Preferably, the upper end of the tank is provided with a support ring, and the inner wall of the support ring is provided with an elastic ring that fits against the outer wall of the guide plate.
[0011] Preferably, positioning sleeves are uniformly fitted on the stirring shaft, and stirring blades are fixed on both sides of the positioning sleeves, and a bent section is provided at the end of each stirring blade near the stirring shaft.
[0012] Preferably, the bottom end of the stirring shaft is fitted with a threaded sleeve, and the outer wall of the threaded sleeve is surrounded by a plurality of inclined disturbance blades.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] This silicon carbide powder surface modification device achieves efficient and uniform contact between silicon carbide powder and modifier through an optimized feeding and diffusion structure, effectively avoiding problems such as local accumulation and insufficient contact, thus improving modification efficiency and quality. The device, through the design of a guide plate and several guide seats arranged around it, combined with a distribution assembly consisting of a distribution seat and multi-nozzle nozzles, ensures that the material is rapidly and uniformly distributed after entering the tank. This not only increases the effective contact area between the silicon carbide powder and the modifier, but also, through the rotation of the stirring shaft driving the operation of the entire dispersion system, further promotes the uniform mixing and diffusion of the material. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the silicon carbide powder surface modification device of this utility model;
[0016] Figure 2 A schematic diagram of the connection structure between the guide plate and the stirring shaft provided by this utility model;
[0017] Figure 3 A schematic diagram of the internal structure of the guide tray provided by this utility model;
[0018] Figure 4 This is a schematic diagram of the connection structure between the disturbance blade and the stirring shaft provided by this utility model.
[0019] In the diagram: 1. Tank body; 2. Stirring shaft; 3. Drive mechanism; 4. Feed pipe; 5. Guide plate; 6. Guide seat; 7. Support ring; 8. Distributor seat; 9. Multi-nozzle nozzle; 10. Positioning sleeve; 11. Stirring blade; 12. Threaded sleeve; 13. Disturbance blade; 14. Annular guide rail; 15. Fixing ring; 16. Fixing pin. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Please see Figure 1-4 This utility model provides a technical solution:
[0022] The silicon carbide powder surface modification device includes a tank 1, with support legs welded and fixed on both sides of the bottom end of the tank 1. A stirring shaft 2 is provided inside the tank 1, and a drive mechanism 3 that drives the stirring shaft 2 to rotate is provided at the top of the tank 1.
[0023] Combination Figure 3 As shown, the drive mechanism 3 is composed of a motor and a reducer and is connected to the top of the stirring shaft 2 via a coupling. Both sides of the drive mechanism 3 are provided with feed pipes 4, and vacuum valves are installed on the feed pipes 4.
[0024] The bottom of the tank 1 is provided with a discharge pipe, and the upper end of the stirring shaft 2 is connected to a guide plate 5 located inside the tank 1. The center of the guide plate 5 is inserted outside the upper end of the stirring shaft 2. Four guide seats 6 are arranged around the guide plate 5. A guide port is provided on the bottom wall of the guide plate 5 at each position corresponding to the guide seat 6. The bottom of the guide port of the guide plate 5 is equipped with a corresponding material distribution component through the annular guide rail 14. There are also four material distribution components, all of which are integrated structures consisting of a material distribution seat 8 and a multi-nozzle nozzle 9.
[0025] In this process, when silicon carbide powder enters the tank 1 through the feed pipe 4, the stability of the material flow is ensured by the regulation of the vacuum valve. The stirring shaft 2 is driven to rotate by the drive mechanism 3, which causes the guide plate 5 to rotate accordingly. Several guide seats 6 arranged around the inside of the guide plate 5 guide the powder to be evenly dispersed to the guide port. Then, the powder is further dispersed by the distribution components installed on the annular guide rail 14. Each distribution component is cooperated by the distribution seat 8 and the multi-nozzle 9 to ensure that the powder can be evenly distributed and sprayed out from multiple directions at the same time, which increases the effective contact area between the powder and the modifier. This effectively solves the problem of insufficient diffusion between silicon carbide powder and modifier caused by the lack of an effective dispersion mechanism in traditional devices. Especially under high-volume operation, it avoids the occurrence of local accumulation of powder, thereby significantly improving the efficiency and quality of silicon carbide powder surface modification, achieving a high-efficiency and uniform modification effect, and solving the technical problems of insufficient contact, incomplete or uneven modification process caused by the rapid entry of powder into the modification area in the existing technology.
[0026] In this utility model, the inner end of the guide seat 6 is welded and fixed to the inner side wall of the guide plate 5. The guide seat 6 has a trapezoidal structure and a guide port inside. The inner wall of the guide port inside the guide seat 6 has an inclined downward structure. When silicon carbide powder enters the tank 1 through the feed pipe 4, the material is guided to the guide plate 5 and then slides smoothly down the inclined inner wall of the guide seat 6 and is evenly distributed to each guide port. The unique shape and inclined design of the guide seat 6 can not only effectively guide the flow direction of the material, but also prevent the material from forming a blockage or local accumulation at this point, ensuring that the material can flow out smoothly from the guide port and be further dispersed by the distribution component.
[0027] In this utility model, combined with Figure 3 As shown, the guide plate 5 is provided with a fixing ring 15 sleeved on the stirring shaft 2, and the bottom end of the fixing ring 15 is connected to a fixing pin 16 through a connecting ear. The stirring shaft 2 is provided with a through hole that matches the structure of the fixing pin 16. This structure of fixing ring 15 and stirring shaft 2 through the common insertion of fixing pin 16 and through hole at the top end of the stirring shaft 2 makes the connection between fixing ring 15 and stirring shaft 2 more firm and reliable, preventing loosening or separation that may occur during high-speed rotation. This not only enhances the integration between guide plate 5 and stirring shaft 2, but also ensures the synchronization of the two during operation, thereby ensuring that guide plate 5 can stably and efficiently perform material distribution.
[0028] In this utility model, a support ring 7 is welded and fixed on the inner wall of the upper end of the tank body 1, and an elastic ring is provided on the inner wall of the support ring 7 that fits against the outer side wall of the guide plate 5. When the guide plate 5 rotates with the stirring shaft 2, the support ring 7 provides stable support and necessary sealing through the elastic ring on its inner wall that fits against the outer side wall of the guide plate 5, ensuring the stability of its position and the reliability of its long-term use.
[0029] Combination Figure 1 and Figure 2As shown, positioning sleeves 10 are uniformly fitted on the stirring shaft 2. The positioning sleeves 10 can be detachably installed on the stirring shaft 2 via screws. Stirring blades 11 are welded and fixed on both sides of the positioning sleeves 10. Each stirring blade 11 has a bent section at one end near the stirring shaft 2. With this structure, the rotation of the stirring shaft 2 drives the positioning sleeves 10 and stirring blades 11 uniformly fitted on it to rotate together. The positioning sleeves 10 can be detachably installed on the stirring shaft 2 via screws, which facilitates the adjustment or replacement of the position and number of stirring blades 11 to adapt to different process requirements. The bent section of the stirring blade 11 at the end near the stirring shaft 2 can be made of high-strength wear-resistant alloy material. In this way, the stirring blades 11 can flexibly adjust their shape through the bent section to form a complex flow field inside the tank 1. This not only effectively mixes silicon carbide powder and modifier, but also adjusts the flow path and turbulence of the material by changing the angle of the stirring blades 11, thereby improving the dispersion effect and reaction rate of the material.
[0030] Combination Figure 1 and Figure 4 As shown, the bottom end of the stirring shaft 2 is fitted with a threaded sleeve 12, and several inclined agitator blades 13 are welded and fixed around the outer wall of the threaded sleeve 12. The surface of the agitator blades 13 is provided with several raised stripes. As the stirring shaft 2 rotates, the several agitator blades 13 fixed around the outer wall of the threaded sleeve 12 also rotate. The agitator blades 13 work together to enhance the mixing and agitation effect on the material. Specifically, the inclined agitator blades 13 can generate oblique thrust, so that the material is not only fully stirred in the horizontal direction, but also forms an effective circulation flow in the vertical direction, avoiding the material from settling at the bottom of the tank 1, thereby improving the overall fluidity and uniformity of the material. The raised stripe design further increases the friction between the agitator blades 13 and the material, which helps to break the agglomeration between materials and promotes the full contact and reaction between silicon carbide powder and modifier, greatly improving the modification efficiency and quality.
[0031] Working principle: When using this silicon carbide powder surface modification device, silicon carbide powder is first fed into the tank 1 through two feed pipes 4. During the feeding process, the material flow rate is regulated by a vacuum valve. Then, the drive mechanism 3 is started to drive the stirring shaft 2 to rotate. The rotation of the stirring shaft 2 causes the guide plate 5 located on its upper outer side to rotate accordingly. Four guide seats 6 guide the powder to slide smoothly down its inclined inner wall and be evenly distributed to each guide port. Subsequently, the material flows out from the guide port of the guide plate 5 and is further processed by the distribution components installed on the annular guide rail 14. Each distribution component, consisting of a distribution seat 8 and a multi-nozzle 9, also rotates through the annular guide rail 14 to distribute the powder. The powder is dispersed to ensure that it can be evenly distributed and sprayed from multiple directions simultaneously. At the same time, the positioning sleeve 10 and the two side stirring blades 11 rotate together with the stirring shaft 2. The bent section of the stirring blades 11 near the stirring shaft 2 adjusts the flow path and turbulence of the material. In addition, the screw sleeve 12 at the bottom of the stirring shaft 2 and several disturbance blades 13 on its outer wall also rotate together with the stirring shaft 2, generating effective circulation flow in the vertical direction to prevent the material from settling at the bottom of the tank 1. Finally, the material after thorough mixing and reaction is discharged through the discharge pipe at the bottom of the tank 1, thus completing a series of work processes.
[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A device for surface modification of silicon carbide powder, comprising a tank (1), characterized in that: The tank (1) is equipped with a stirring shaft (2) inside. The top of the tank (1) is equipped with a drive mechanism (3) that drives the stirring shaft (2) to rotate. Both sides of the drive mechanism (3) are equipped with feed pipes (4). The upper end of the stirring shaft (2) is connected to a guide plate (5) located inside the tank (1). Several guide seats (6) are arranged around the guide plate (5). A guide port is provided on the bottom wall of the guide plate (5) at a position corresponding to each guide seat (6). Each guide port of the guide plate (5) is equipped with a material distribution component through a ring guide rail (14). The material distribution assembly is an integrated structure consisting of a material distribution seat (8) and a multi-nozzle nozzle (9).
2. The silicon carbide powder surface modification device according to claim 1, characterized in that: The guide seat (6) has a trapezoidal structure and a guide port inside it. The inner wall of the guide port has an inclined downward structure.
3. The silicon carbide powder surface modification device according to claim 1, characterized in that: The guide plate (5) is provided with a fixing ring (15) sleeved on the stirring shaft (2), and the bottom end of the fixing ring (15) is inserted with a fixing pin (16) through a connecting ear, and the stirring shaft (2) is provided with a through hole that matches the structure of the fixing pin (16).
4. The silicon carbide powder surface modification device according to claim 1, characterized in that: The upper end of the tank (1) is provided with a support ring (7), and the inner wall of the support ring (7) is provided with an elastic ring that fits against the outer wall of the guide plate (5).
5. The silicon carbide powder surface modification device according to claim 1, characterized in that: Positioning sleeves (10) are evenly fitted on the stirring shaft (2), and stirring blades (11) are fixed on both sides of the positioning sleeves (10), and a bending section is provided at one end of the stirring blades (11) near the stirring shaft (2).
6. The silicon carbide powder surface modification apparatus according to claim 1, characterized in that: The bottom end of the stirring shaft (2) is fitted with a threaded sleeve (12), and the outer wall of the threaded sleeve (12) is surrounded by a number of inclined disturbance blades (13).