Wet mixing and stirring device for surface modification of silicon carbide powder

Abstract

This utility model discloses a wet mixing and stirring device for surface modification of silicon carbide powder, belonging to the field of silicon carbide powder processing technology. It includes a mixing tank with a bearing at the top and a rotating shaft passing through the bearing. A first fixing frame is fixedly connected to the top of the mixing tank, and a motor is fixedly connected to the first fixing frame. Its advantages are that by setting up a spiral stirring paddle, a frame-type stirring paddle, and shearing blades, thorough mixing of materials can be achieved. When the motor drives the rotating shaft to rotate, the spiral stirring paddle can transport the silicon carbide powder at the bottom upwards, while the frame-type stirring paddle stirs the material in the middle and upper parts. The two work together to form a three-dimensional mixing effect, effectively preventing the silicon carbide powder from settling due to its high density. At the same time, the shearing blades on the inner wall of the frame-type stirring paddle can break up agglomerated powder, further improving the mixing uniformity and ensuring sufficient contact between the modifier and the silicon carbide powder, solving the problem of uneven mixing caused by traditional single stirring paddles.

Description

Technical Field

[0001] This utility model relates to the field of silicon carbide powder processing technology, and more specifically, it relates to a wet mixing and stirring device for surface modification of silicon carbide powder. Background Technology

[0002] Silicon carbide powder is widely used in ceramics, abrasives, electronics and other fields. To improve its performance, surface modification treatment is often required. Wet mixing is one of the commonly used modification methods. Existing wet mixing devices mostly adopt a single stirring paddle structure. During the mixing process, silicon carbide powder is prone to settling due to its high density, resulting in uneven material mixing. The modifier cannot fully contact the powder, affecting the modification effect. At the same time, traditional devices lack precise control of temperature and pH during the mixing process. These two parameters are crucial to the surface modification reaction. Temperature fluctuations or pH deviations from the optimal range will lead to uneven thickness of the modified layer and reduced bonding strength. Utility Model Content

[0003] (1) Technical problems to be solved In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a wet mixing and stirring device for surface modification of silicon carbide powder, which has the characteristics of uniform mixing and easy control of temperature and pH value.

[0004] (2) Technical solution To achieve the above objectives, this utility model provides a wet mixing and stirring device for surface modification of silicon carbide powder, including a mixing tank. A bearing is installed at the top of the mixing tank, and a rotating shaft passes through the interior of the bearing. A first fixing frame is fixedly connected to the top of the mixing tank, and a motor is fixedly connected to the first fixing frame. The output end of the motor is fixedly connected to the top end of the rotating shaft. A spiral stirring paddle and a frame-type stirring paddle are fixedly connected to the surface of the rotating shaft. A shearing blade is fixedly connected to the inner wall of the frame-type stirring paddle, and a scraper is fixedly connected to the surface of the frame-type stirring paddle, with the surface of the scraper overlapping the inner wall of the mixing tank. A heating chamber is formed inside the inner wall of the mixing tank, and a liquid inlet is fixedly connected to the top of the mixing tank. The mixing tank has an inlet pipe connected to the heating chamber, an outlet pipe fixedly connected to the bottom of the mixing tank, and a circulation pump fixedly connected to the bottom of the mixing tank via a second fixing bracket. The inlet end of the circulation pump is fixedly connected to the bottom of the mixing tank via an inlet pipe, and the outlet end of the circulation pump is fixedly connected to a feeding pipe. An annular liquid distribution pipe is fixedly connected to the top of the inner wall of the mixing tank via a fixing seat. An atomizing nozzle is fixedly connected to the surface of the annular liquid distribution pipe. One end of the feeding pipe is fixedly connected to the annular liquid distribution pipe. A temperature sensor and a pH sensor are installed inside the mixing tank. A control shell is fixedly connected to the surface of the mixing tank, and a controller is installed inside the control shell.

[0005] When using the wet mixing and stirring device for silicon carbide powder surface modification according to this technical solution, the spiral stirring paddle, frame stirring paddle, and shearing blades can achieve thorough mixing of materials. When the motor drives the shaft to rotate, the spiral stirring paddle can transport the silicon carbide powder at the bottom upwards, while the frame stirring paddle stirs the materials in the middle and upper parts. The two work together to form a three-dimensional stirring effect, effectively preventing the silicon carbide powder from settling due to its high density. At the same time, the shearing blades on the inner wall of the frame stirring paddle can break up the agglomerated powder, further improving the mixing uniformity and ensuring that the modifier and silicon carbide powder are in full contact. This solves the problem of uneven mixing caused by traditional single stirring paddles. The heating chamber, temperature sensor, pH sensor, and controller facilitate the monitoring of temperature and pH during the stirring process. The system allows for precise temperature and pH control. Temperature and pH sensors monitor the reaction conditions inside the mixing tank in real time and transmit the data to the controller. Operators can adjust the temperature by introducing hot or cold media into the heating chamber through the inlet pipe and control the pH value by adjusting the amount of modifier added through the metering valve on the modifier addition pipe. This ensures that the surface modification reaction takes place under optimal conditions, preventing poor quality of the modified layer due to temperature fluctuations or pH deviations. The circulation pump, annular distribution pipe, and atomizing nozzles enhance the material circulation and mixing effect. The circulation pump transports the material from the bottom of the mixing tank to the annular distribution pipe through the feed pipe, and then sprays it evenly to the top through the atomizing nozzles, allowing the material to come into contact with the modifier again during circulation, further improving the mixing uniformity. In addition, the PTFE scraper on the surface of the frame-type stirring paddle overlaps with the inner wall of the mixing tank, which can clean the residual material on the tank wall in real time, reducing waste and ensuring the stability of the modification quality of subsequent batches.

[0006] Furthermore, a feed hopper and a modifier addition pipe are fixedly connected to the top of the mixing tank. A filter screen is installed inside the feed hopper, and a metering valve is installed on the modifier addition pipe.

[0007] Furthermore, a discharge pipe is fixedly connected to the bottom of the mixing tank, and a solenoid valve is installed on the discharge pipe.

[0008] Furthermore, a support leg is fixedly connected to the bottom of the mixing tank, and a rubber pad is provided at the bottom of the support leg.

[0009] Furthermore, the surface of the control housing is provided with operation buttons and a display screen, and the temperature sensor, pH sensor, motor, solenoid valve and circulation pump are all electrically connected to the controller.

[0010] Furthermore, the scraper is made of polytetrafluoroethylene material.

[0011] (3) Beneficial effects In summary, this utility model has the following beneficial effects: 1. This wet mixing and stirring device for surface modification of silicon carbide powder, by setting up a spiral stirring paddle, a frame stirring paddle and shearing blades, can achieve full mixing of materials. When the motor drives the rotating shaft to rotate, the spiral stirring paddle can transport the silicon carbide powder at the bottom upwards, while the frame stirring paddle stirs the materials in the middle and upper parts. The two work together to form a three-dimensional stirring effect, which effectively prevents the silicon carbide powder from settling due to its high density. At the same time, the shearing blades on the inner wall of the frame stirring paddle can break up the agglomerated powder, further improving the mixing uniformity and ensuring that the modifier and silicon carbide powder are in full contact, thus solving the problem of uneven mixing in traditional single stirring paddles. 2. This wet mixing and stirring device for silicon carbide powder surface modification is equipped with a heating chamber, temperature sensor, pH sensor, and controller. This allows for precise control of temperature and pH during the stirring process. The temperature and pH sensors monitor the reaction conditions inside the mixing tank in real time and transmit the data to the controller. Operators can adjust the temperature by pressing buttons and introducing hot or cold media into the heating chamber through the liquid inlet pipe. The amount of modifier added can be adjusted by the metering valve on the modifier addition pipe to control the pH value, ensuring that the surface modification reaction takes place under optimal conditions and avoiding poor quality of the modified layer due to temperature fluctuations or pH deviations. 3. This wet mixing and stirring device for surface modification of silicon carbide powder enhances the material circulation and mixing effect by setting up a circulating pump, annular liquid distribution pipe, and atomizing nozzles. The circulating pump transports the material at the bottom of the mixing tank to the annular liquid distribution pipe through the feeding pipe, and then sprays it evenly to the upper part through the atomizing nozzles, so that the material comes into contact with the modifier again during the circulation process, further improving the mixing uniformity. In addition, the polytetrafluoroethylene scraper on the surface of the frame-type stirring paddle overlaps with the inner wall of the mixing tank, which can clean the residual material on the tank wall in real time, reducing waste while ensuring the stability of the modification quality of subsequent batches. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional cross-sectional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention.

[0014] The labels in the attached diagram are: 1. Mixing tank; 2. Rotating shaft; 3. Spiral agitator; 4. Frame agitator; 5. Shearing blade; 6. First fixed frame; 7. Motor; 8. Circulating pump; 9. Feeding pipe; 10. Heating chamber; 11. Liquid inlet pipe; 12. Liquid outlet pipe; 13. Annular liquid distribution pipe; 14. Atomizing nozzle; 15. Scraper; 16. Modifier addition pipe; 17. Metering valve; 18. Feed hopper; 19. Discharge pipe; 20. Solenoid valve; 21. Temperature sensor; 22. pH sensor; 23. Support leg; 24. Control housing. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the technical solutions in the specific embodiments of this utility model are clearly and completely described below to further illustrate this utility model. Obviously, the specific embodiments described are only a part of the embodiments of this utility model, and not all of them.

[0016] Example: The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below.

[0017] Please see Figure 1-2This utility model provides a technical solution: a wet mixing and stirring device for surface modification of silicon carbide powder, including a mixing tank 1, a bearing on the top of the mixing tank 1, and a rotating shaft 2 passing through the inside of the bearing. A first fixing frame 6 is fixedly connected to the top of the mixing tank 1, and a motor 7 is fixedly connected to the first fixing frame 6. The output end of the motor 7 is fixedly connected to the top end of the rotating shaft 2. A spiral stirring paddle 3 and a frame stirring paddle 4 are fixedly connected to the surface of the rotating shaft 2. A shearing blade 5 is fixedly connected to the inner wall of the frame stirring paddle 4. A scraper 15 is provided, the surface of which overlaps with the inner wall of the mixing tank 1. A heating chamber 10 is provided inside the inner wall of the mixing tank 1. An inlet pipe 11 is fixedly connected to the top of the mixing tank 1, and the inlet pipe 11 is connected to the heating chamber 10. An outlet pipe 12 is fixedly connected to the bottom of the mixing tank 1, and the outlet pipe 12 is connected to the heating chamber 10. A circulation pump 8 is fixedly connected to the bottom of the mixing tank 1 via a second fixing bracket. The feed end of the circulation pump 8 is fixedly connected to the bottom of the mixing tank 1 via a feed pipe, and the discharge end of the circulation pump 8 is fixedly connected to a feeding pipe 9. An annular liquid distribution pipe 13 is fixedly connected to the top of the inner wall of the tank 1 via a fixed base. An atomizing nozzle 14 is fixedly connected to the surface of the annular liquid distribution pipe 13. One end of the feeding pipe 9 is fixedly connected to the annular liquid distribution pipe 13. A temperature sensor 21 and a pH sensor 22 are installed inside the mixing tank 1. A control shell 24 is fixedly connected to the surface of the mixing tank 1. A controller is installed inside the control shell 24. By setting up a spiral stirring paddle 3, a frame stirring paddle 4, and a shearing blade 5, the materials can be fully mixed. When the motor 7 drives the rotating shaft 2 to rotate, the spiral stirring... The paddle 3 conveys the silicon carbide powder from the bottom upwards, while the frame-type stirring paddle 4 stirs the materials in the middle and upper parts. Together, they create a three-dimensional stirring effect, effectively preventing the silicon carbide powder from settling due to its high density. Simultaneously, the shearing blades 5 on the inner wall of the frame-type stirring paddle 4 break up agglomerated powder particles, further improving mixing uniformity and ensuring sufficient contact between the modifier and the silicon carbide powder. This solves the problem of uneven mixing caused by traditional single-paddle stirring. The addition of a heating chamber 10, temperature sensor 21, pH sensor 22, and controller facilitates monitoring of temperature and pH during the stirring process. The pH value is precisely controlled. Temperature sensor 21 and pH sensor 22 monitor the reaction conditions inside the mixing tank 1 in real time and transmit the data to the controller. Operators can adjust the temperature by introducing hot or cold medium into the heating chamber 10 through the liquid inlet pipe 11, and adjust the amount of modifier added through the metering valve 17 on the modifier addition pipe 16 to control the pH value, ensuring that the surface modification reaction takes place under optimal conditions and avoiding poor quality of the modified layer due to temperature fluctuations or pH deviations. By setting up a circulation pump 8, annular liquid distribution pipe 13, and atomizing nozzle 14, the circulation and mixing effect of the material can be enhanced. The circulation pump 8 transports the material at the bottom of the mixing tank 1 to the annular liquid distribution pipe 13 through the feed pipe 9, and then sprays it evenly to the upper part through the atomizing nozzle 14, so that the material comes into contact with the modifier again during the circulation process, further improving the mixing uniformity.Furthermore, the PTFE scraper 15 on the surface of the frame-type agitator 4 overlaps with the inner wall of the mixing tank 1, allowing for real-time cleaning of residual material on the tank wall, reducing waste while ensuring the stability of the modification quality in subsequent batches.

[0018] Specifically, the top of the mixing tank 1 is fixedly connected to a feed hopper 18 and a modifier addition pipe 16. The feed hopper 18 is equipped with a filter screen, and the modifier addition pipe 16 is equipped with a metering valve 17.

[0019] By adopting the above technical solution, the filter screen facilitates the filtration of materials.

[0020] Specifically, a discharge pipe 19 is fixedly connected to the bottom of the mixing tank 1, and a solenoid valve 20 is installed on the discharge pipe 19.

[0021] Specifically, the bottom of the mixing tank 1 is fixedly connected to a support leg 23, and the bottom of the support leg 23 is provided with a rubber pad.

[0022] By adopting the above technical solution, the friction between the support leg 23 and the ground is increased by the rubber pad, which makes it easier to stop the mixing tank 1 stably.

[0023] Specifically, the surface of the control housing 24 is equipped with operation buttons and a display screen, and the temperature sensor 21, pH sensor 22, motor 7, solenoid valve 20 and circulation pump 8 are all electrically connected to the controller.

[0024] Specifically, scraper 15 is made of polytetrafluoroethylene material.

[0025] The working principle of this utility model is as follows: In use, the silicon carbide powder to be modified is first added to the mixing tank 1 through the feed hopper 18. The filter screen can filter out impurities in the powder to avoid affecting the modification effect. According to the process requirements, an appropriate amount of modifier is added to the mixing tank 1 through the modifier addition pipe 16. The addition amount is precisely controlled by the metering valve 17 to ensure the accuracy of the initial material ratio. The motor 7 is started, and the output end of the motor 7 drives the rotating shaft 2 to rotate. The spiral stirring blade 3 and the frame stirring blade 4 on the surface of the rotating shaft 2 operate synchronously. The spiral stirring blade 3 conveys the silicon carbide powder at the bottom of the mixing tank 1 upwards, and the frame stirring blade 4 stirs the material in the middle and upper parts. The two work together to form a three-dimensional stirring flow field. The shearing blades 5 on the inner wall of the frame-type stirring paddle 4 break up the agglomerated powder, so that the silicon carbide powder and the modifier are initially mixed evenly. At the same time, the polytetrafluoroethylene scraper 15 on the surface of the frame-type stirring paddle 4 cleans the residual material on the barrel wall during the stirring process. The circulation pump 8 is turned on, and the circulation pump 8 draws the material from the bottom of the mixing barrel 1 through the feed pipe and delivers it to the annular liquid distribution pipe 13 through the feed pipe 9. Then, the atomizing nozzle 14 sprays the material evenly onto the upper part of the mixing barrel 1. During the circulation process, the material comes into contact with the modifier again and mixes, further improving the mixing uniformity and avoiding localized uneven mixing caused by the sedimentation of silicon carbide powder. During the stirring process, the temperature sensor 21 and the pH sensor monitor the temperature and pH value inside the mixing barrel 1 in real time and transmit the data to the controller. If the temperature deviates from the preset range, a hot or cold medium is introduced into the heating chamber 10 through the inlet pipe 11. The heat is transferred through the barrel wall to regulate the material temperature. The used medium is discharged from the outlet pipe 12. If the pH value deviates from the preset range, an appropriate amount of modifier is added by operating the metering valve 17 to adjust the pH value, ensuring that the reaction proceeds under optimal conditions. After the preset stirring time is reached, the controller automatically shuts off the motor 7 and the circulating pump 8. After the material in the stirring tank 1 has settled for a while, the solenoid valve 20 on the discharge pipe 19 is opened by operating the button, and the modified silicon carbide powder suspension is discharged from the discharge pipe 19, completing the surface modification operation.

[0026] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A wet mixing and stirring device for surface modification of silicon carbide powder, comprising a stirring barrel (1), characterized in that: The top of the mixing tank (1) is provided with a bearing, and a rotating shaft (2) passes through the inside of the bearing. A first fixing frame (6) is fixedly connected to the top of the mixing tank (1). A motor (7) is fixedly connected to the first fixing frame (6). The output end of the motor (7) is fixedly connected to the top of the rotating shaft (2). A spiral stirring paddle (3) and a frame stirring paddle (4) are fixedly connected to the surface of the rotating shaft (2). A shearing blade (5) is fixedly connected to the inner wall of the frame stirring paddle (4). A scraper (15) is fixedly connected to the surface of the frame stirring paddle (4). The surface of the scraper (15) overlaps with the inner wall of the mixing tank (1). A heating chamber (10) is opened inside the inner wall of the mixing tank (1). An inlet pipe (11) is fixedly connected to the top of the mixing tank (1). The inlet pipe (11) is connected to the heating chamber (10). The mixing tank ( 1) The bottom of the mixing tank (1) is fixedly connected to the liquid outlet pipe (12), which is connected to the heating chamber (10). The bottom of the mixing tank (1) is fixedly connected to the circulation pump (8) through the second fixed frame. The feed end of the circulation pump (8) is fixedly connected to the bottom of the mixing tank (1) through the feed pipe. The discharge end of the circulation pump (8) is fixedly connected to the feeding pipe (9). The top of the inner wall of the mixing tank (1) is fixedly connected to the annular liquid distribution pipe (13) through the fixed seat. The surface of the annular liquid distribution pipe (13) is fixedly connected to the atomizing nozzle (14). One end of the feeding pipe (9) is fixedly connected to the annular liquid distribution pipe (13). The inside of the mixing tank (1) is provided with a temperature sensor (21) and a pH sensor (22). The surface of the mixing tank (1) is fixedly connected to a control shell (24). The inside of the control shell (24) is provided with a controller.

2. The wet mixing and stirring apparatus for surface modification of silicon carbide powder according to claim 1, wherein: The top of the mixing tank (1) is fixedly connected to a feed hopper (18) and a modifier addition pipe (16). The feed hopper (18) is equipped with a filter screen, and the modifier addition pipe (16) is equipped with a metering valve (17).

3. The apparatus for surface modification of silicon carbide powder by wet mixing and stirring according to claim 1, wherein: The bottom of the mixing tank (1) is fixedly connected to a discharge pipe (19), and a solenoid valve (20) is provided on the discharge pipe (19).

4. The apparatus for wet mixing and stirring of silicon carbide powder surface modification according to claim 1, characterized in that: The bottom of the mixing tank (1) is fixedly connected to a support leg (23), and the bottom of the support leg (23) is provided with a rubber pad.

5. The apparatus for wet mixing and stirring of silicon carbide powder surface modification according to claim 1, wherein: The surface of the control housing (24) is provided with operation buttons and a display screen. The temperature sensor (21), pH sensor (22), motor (7), solenoid valve (20) and circulation pump (8) are all electrically connected to the controller.

6. The wet mixing and stirring apparatus for surface modification of silicon carbide powder according to claim 1, wherein: The scraper (15) is made of polytetrafluoroethylene.

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