A powder surface passivation treatment apparatus

Abstract

The utility model relates to powder processing technical field especially relates to a powder surface passivation treatment equipment. Including bottom plate, stand, jar body, connecting rod, servo motor, shaft coupling and pivot etc. parts, the bottom plate top fixedly connected with stand, the bottom plate top both sides all are fixedly equipped with mounting bracket, two mounting brackets between fixedly connected with jar body, the stand upper portion fixedly connected with connecting rod, the connecting rod right part fixedly connected with servo motor, the output shaft of servo motor passes out connecting rod fixedly connected with shaft coupling, and the shaft coupling bottom is fixedly provided with the pivot. The utility model discloses the setting that the through -hole is set up to the abutment cooperation of the inner side wall of the inner tube with the outer side of the stirring vane, and the scraper that is set up with the abutment cooperation of the inner tube bottom side in the pivot bottom end, realizes the whole domain dead angle stirring under the drive of servo motor, effectively avoids the stirring dead angle and powder deposition problem that traditional equipment exists, reaches the effect that significantly improves passivation treatment uniformity and reaction thoroughness.

Description

Technical Field

[0001] This utility model relates to the field of powder processing technology, and in particular to a powder surface passivation treatment device. Background Technology

[0002] In the field of powder material preparation and application, surface passivation is a crucial process, especially for reactive metal powders (such as magnesium powder, aluminum powder, and titanium powder), rare earth powders, and easily oxidized functional powders. This process forms a dense and stable protective film (such as oxides, phosphides, or organic films) on the surface of powder particles, effectively isolating them from contact with oxygen and moisture in the air. This significantly improves the material's oxidation resistance, corrosion resistance, storage stability, and safety in use, preventing spontaneous combustion or explosion accidents during subsequent processing (such as 3D printing and powder metallurgy).

[0003] Currently, the powder passivation equipment commonly used in industry is mostly traditional batch reactors or stirred tank reactors. However, traditional stirring devices (such as paddle and impeller types) are prone to forming dead zones at the bottom and side walls of the container, which prevents high-density or easily agglomerated powders from being fully suspended. The passivating agent is difficult to contact all particles evenly, resulting in some powders reacting excessively and agglomerating, while others react incompletely, leaving residual active sites, which seriously affects product quality and safety.

[0004] Therefore, it is necessary to design a powder surface passivation treatment device to solve the above-mentioned technical problems. Utility Model Content

[0005] To overcome the shortcomings of traditional autoclave or stirred tank powder passivation equipment, which easily form dead zones due to uneven stirring, resulting in insufficient suspension of high-density or easily agglomerated powders, uneven contact of passivating agent, causing partial agglomeration and incomplete reaction, thus affecting product quality and safety, this utility model provides a powder surface passivation treatment device.

[0006] Technical Solution: A powder surface passivation treatment device includes a base plate, a column, a tank, a connecting rod, a servo motor, a coupling, a rotating shaft, a top cover, a connecting pipe, a spare pipe, a waste gas discharge pipe, a feeding pipe, a protective cover, an inner cylinder, a discharge pipe, valves, a stirring rack, a scraper, and a heating assembly. The column is fixedly connected to the top of the base plate, and mounting brackets are fixedly installed on both sides of the top of the base plate. The tank is fixedly connected between the two mounting brackets. A connecting rod is fixedly connected to the upper part of the column, and a servo motor is fixedly connected to the right side of the connecting rod. The output shaft of the servo motor passes through the connecting rod and is fixedly connected to a coupling. A rotating shaft is fixedly sleeved at the bottom of the coupling. The top cover is fixedly connected to the top of the tank, and the top of the top cover has a circular array... The tank is connected to a connecting pipe, a spare pipe, an exhaust pipe, and a feeding pipe. The tops of the connecting pipe, spare pipe, exhaust pipe, and feeding pipe are all connected to protective covers via flanges. An inner cylinder is fixedly fitted inside the tank. The rotating shaft passes through the top cover to the inside of the inner cylinder. A discharge pipe is connected to the bottom side of the inner cylinder. The right side of the discharge pipe extends out of the tank and is connected to a valve. A stirring frame is fixedly fitted in the middle of the rotating shaft. Multiple stirring blades are fixedly arranged in a circular array outside the stirring frame. Each stirring blade has multiple through holes. One side of each stirring blade abuts against the inner wall of the inner cylinder. A scraper is fixedly fitted at the bottom of the rotating shaft. The bottom of the scraper abuts against the bottom of the inner cylinder. A heating element is provided at the top of the bottom plate.

[0007] Furthermore, it is particularly preferred that the connecting pipe, spare pipe, exhaust pipe and feeding pipe are all connected to the inner cylinder.

[0008] In addition, it is particularly preferred that the valve is made of polytetrafluoroethylene.

[0009] In addition, it is particularly preferred that the column also includes reinforcing rings, with reinforcing rings fixedly fitted on both sides of the middle part of the column, and both reinforcing rings fixedly fitted on the outer wall of the tank.

[0010] Furthermore, it is particularly preferred that both the tank body and the inner cylinder are made of high borosilicate glass.

[0011] Furthermore, it is particularly preferred that the heating assembly includes a constant temperature water tank, an inlet pipe, a drain pipe, a water supply pipe, a water pump, a heating pipe, and a sealing cover. The constant temperature water tank is fixedly connected to the top of the base plate. A cavity is formed between the tank body and the inner cylinder. The inlet pipe is connected and communicated to the front of the tank body. The drain pipe is connected and communicated to the left side of the tank body. The left side of the drain pipe is connected and communicated to the rear of the constant temperature water tank. The water supply pipe is connected and communicated to the front of the inlet pipe. The water supply pipe passes through the inside of the constant temperature water tank and is connected and communicated to the water pump. The heating pipe is fixedly connected to the inside of the constant temperature water tank. A riser is connected and communicated to the top of the constant temperature water tank. A sealing cover is placed on the top of the riser.

[0012] Furthermore, it is particularly preferred that both the inlet pipe and the outlet pipe are connected to the cavity.

[0013] In addition, it is particularly preferred that the device also includes a temperature controller and a temperature sensor. The temperature controller is fixedly connected to the front of the constant temperature water tank, the heating tube is electrically connected to the temperature controller, and the temperature sensor is fixedly connected inside the spare tube and is electrically connected to the temperature controller.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention adopts the setting of the outer side of the stirring blade abutting against the inner side wall of the inner cylinder and opening through holes, combined with the scraper set at the bottom end of the rotating shaft abutting against the bottom side of the inner cylinder, and achieves stirring without dead angles in the whole area under the drive of the servo motor, effectively avoiding the stirring dead angles and powder deposition problems existing in traditional equipment, and achieving a significant improvement in the uniformity of passivation treatment and the thoroughness of reaction.

[0015] 2. This utility model, by setting up a closed-loop temperature control function consisting of a constant temperature water tank, water pump, heating tube, cavity, temperature controller and temperature sensor, can dynamically adjust the circulating water temperature according to the real-time monitored material temperature, realize rapid response and precise temperature control of the reaction material in the inner cylinder, and achieve the effects of effectively preventing local overheating, controlling the reaction rate and ensuring the consistency of passivation film quality.

[0016] 3. This utility model adopts a fully enclosed tank body, top cover and sealing cover for connecting pipes, spare pipes, exhaust pipes and feeding pipes, and connects a treatment device to the exhaust pipe. This achieves complete isolation between the reaction process and the external environment. It can introduce inert gas to create anaerobic reaction conditions and reliably collect and treat harmful waste gases generated by the reaction, thereby improving operational safety, meeting environmental protection requirements and protecting the health of operators. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the base plate, columns, and tank body of this utility model.

[0019] Figure 3 This is a three-dimensional structural diagram of the connecting pipe, protective cover, and discharge pipe of this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the components of this utility model, including the discharge pipe, valve, and inner cylinder.

[0021] Figure 5 This is a three-dimensional structural diagram of the servo motor, coupling, and shaft components of this utility model.

[0022] Figure 6 This is a three-dimensional structural diagram of the inner cylinder, stirring rack, scraper, and other components of this utility model.

[0023] Figure 7 This is a three-dimensional structural diagram of the constant temperature water tank, temperature controller, and water supply pipe of this utility model.

[0024] Figure 8 This is a three-dimensional structural diagram of the base plate, water inlet pipe, and drain pipe of this utility model.

[0025] Figure 9 This is a three-dimensional structural diagram of the constant temperature water tank, temperature controller, and water supply pipe of this utility model.

[0026] Figure 10 This is a three-dimensional structural diagram of the tank, drain pipe, and constant temperature water tank of this utility model.

[0027] Figure 11 This is a three-dimensional structural diagram of the top cover, feeding pipe, and temperature sensor of this utility model.

[0028] The above-mentioned attached drawings include the following reference numerals: 1. Base plate, 2. Column, 3. Tank body, 4. Reinforcing ring, 5. Connecting rod, 6. Servo motor, 7. Coupling, 8. Rotating shaft, 9. Top cover, 1001. Connecting pipe, 1002. Spare pipe, 1003. Exhaust gas discharge pipe, 1004. Feeding pipe, 11. Protective cover, 12. Discharge pipe, 13. Valve, 14. Inner cylinder, 15. Stirring rack, 16. Scraper, 17. Constant temperature water tank, 18. Temperature controller, 19. Water supply pipe, 20. Inlet pipe, 21. Drain pipe, 22. Water pump, 23. Heating pipe, 24. Sealing cover, 25. Temperature sensor. Detailed Implementation

[0029] Example: A powder surface passivation treatment device, such as Figures 1-11As shown, the system includes a base plate 1, a column 2, a tank body 3, a connecting rod 5, a servo motor 6, a coupling 7, a rotating shaft 8, a top cover 9, a connecting pipe 1001, a spare pipe 1002, a waste gas discharge pipe 1003, a feeding pipe 1004, a protective cover 11, an inner cylinder 14, a discharge pipe 12, a valve 13, a stirring rack 15, a scraper 16, a constant temperature water tank 17, a water inlet pipe 20, a drain pipe 21, a water delivery pipe 19, a water pump 22, a heating pipe 23, and a sealing cover 24. The column 2 is screwed onto the top left side of the base plate 1. Mounting brackets are screwed onto the front and rear sides of the top of the base plate 1. The tank body 3 is screwed between the two mounting brackets. A connecting rod 5 is screwed onto the top side of the column 2. Connecting rod 5, a servo motor 6 is screwed onto the top right side of the connecting rod 5. The output shaft of the servo motor 6 extends downward through the connecting rod 5 and is screwed onto a coupling 7. A rotating shaft 8 is screwed onto the bottom side of the coupling 7. A top cover 9 is connected to the top side of the tank body 3 via a flange. A connecting pipe 1001, a spare pipe 1002, a waste discharge pipe 1003, and a feeding pipe 1004 are connected and communicated in a circular array on the top side of the top cover 9. A protective cover 11 is connected to the top side of each of the connecting pipe 1001, spare pipe 1002, waste discharge pipe 1003, and feeding pipe 1004 via a flange. An inner cylinder 14 is fixedly fitted inside the tank body 3. The connecting pipe 1001, spare pipe 1002, waste discharge pipe 1003, and feeding pipe 1004 are connected to the connecting pipe 1001, spare pipe 1002, waste discharge pipe 1003, and feeding pipe 1004 via flanges. Both the discharge pipe 1003 and the feed pipe 1004 are connected to the inner cylinder 14. The rotating shaft 8 passes through the top cover 9 to the inside of the inner cylinder 14. The bottom side of the inner cylinder 14 is connected to and connected to the discharge pipe 12. The right end of the discharge pipe 12 passes through the tank body 3 and is connected to and connected to the valve 13. The valve 13 is made of polytetrafluoroethylene. The rotating shaft 8 is circumferentially mounted with a stirring frame 15 by screws on the part of the inner cylinder 14. Four stirring blades are welded in a ring array on the outer side of the stirring frame 15. Each stirring blade has multiple through holes. The side of each stirring blade that is away from each other abuts against the inner wall of the inner cylinder 14. A scraper 16 is mounted on the bottom side of the rotating shaft 8 by screws. The bottom side of the scraper 16 abuts against the bottom side of the inner cylinder 14. The bottom plate 1 is topped with a scraper 16. A constant temperature water tank 17 is installed on the left side of the tank 3 by screws. A cavity is formed between the tank body 3 and the inner cylinder 14. A water inlet pipe 20 is connected and communicated to the upper part of the front side of the tank body 3. A drain pipe 21 is connected and communicated to the lower part of the left side of the tank body 3. Both the water inlet pipe 20 and the drain pipe 21 communicate with the cavity. The left end of the drain pipe 21 is connected and communicated to the lower rear side of the constant temperature water tank 17. A water supply pipe 19 is connected and communicated to the front end of the water inlet pipe 20. The water supply pipe 19 passes into the interior of the constant temperature water tank 17. A water pump 22 is connected and communicated to the lower interior of the constant temperature water tank 17. A heating pipe 23 is installed on the front interior of the constant temperature water tank 17 by screws. A riser is connected and communicated to the top side of the constant temperature water tank 17. A sealing cap 24 is placed on the top side of the riser.

[0030] like Figure 2 , Figure 7 , Figure 9 and Figure 11As shown, it also includes a reinforcing ring 4, a temperature controller 18, and a temperature sensor 25. The upper and lower sides of the middle of the column 2 are both fitted with reinforcing rings 4 by screws. Both reinforcing rings 4 are fitted with screws on the outer wall of the tank body 3. The tank body 3 and the inner cylinder 14 are both made of high borosilicate glass, which has excellent thermal stability, chemical inertness and high transparency. The temperature controller 18 is fitted with screws on the middle of the front side of the constant temperature water tank 17. The heating tube 23 is electrically connected to the temperature controller 18. The temperature sensor 25 is fitted with screws inside the spare tube 1002. The temperature sensor 25 is electrically connected to the temperature controller 18.

[0031] When this device is needed to passivate the powder surface, preparation work must first be carried out. Open the protective cover 11 connected to the feeding pipe 1004, and add the powder material to be treated and an appropriate amount of liquid medium into the inner cylinder 14 through the feeding pipe 1004 to form the slurry to be treated. Then seal the protective cover 11 on the connecting pipe 1001, the spare pipe 1002, the waste discharge pipe 1003 and the feeding pipe 1004 to ensure that the entire system is airtight. If the process requires an inert environment, a vacuum pump should be connected to the connecting pipe 1001 to remove the air in the inner cylinder 14, and inert gas may be introduced for replacement to create an oxygen-free condition for the subsequent passivation reaction. After preparation, the water pump 22 is turned on, and water is pumped out from the constant temperature water tank 17, flowing into the cavity through the water supply pipe 19 and the water inlet pipe 20, thereby indirectly exchanging heat with the material in the inner cylinder 14. At the same time, the temperature controller 18 controls the heating tube 23 to work according to the preset temperature command, heating the water in the constant temperature water tank 17 to provide a heat source. The temperature sensor 25 monitors the temperature of the material in the inner cylinder 14 in real time and feeds the signal back to the temperature controller 18. The temperature controller 18 dynamically adjusts the circulating water temperature by controlling the start and stop of the heating tube 23, thereby achieving precise control of the temperature of the reactant material in the inner cylinder 14. This closed-loop temperature control system ensures that the passivation reaction always takes place within the optimal temperature range.

[0032] While the temperature controller 18 is running, the servo motor 6 is started. The output shaft of the servo motor 6 drives the rotating shaft 8 to rotate clockwise or counterclockwise through the coupling 7. The rotating shaft 8 drives the stirring frame 15 and the four stirring blades to rotate synchronously. The outer edge of the stirring blades always maintains contact with the inner wall of the inner cylinder 14. In addition, the through holes can reduce the stirring resistance and promote the convection of the slurry. This can efficiently break up powder agglomerates, so that the powder particles, liquid medium and the subsequently added passivating agent are fully mixed, achieving uniform stirring without dead corners, which greatly improves the uniformity of the passivation treatment. At the same time, the scraper 16 rotates accordingly, and its bottom side always maintains contact with the bottom side of the inner cylinder 14. It can continuously scrape off the sediment that may be deposited at the bottom of the inner cylinder 14, effectively preventing the material from sticking to the wall and depositing agglomerates, ensuring that all powders participate in the reaction.

[0033] When liquid passivating agent needs to be added, it can be slowly added dropwise through the protective cap 11 interface on the spare tube 1002 using an external metering pump or other device. The waste gas generated during the reaction will be discharged from the waste discharge tube 1003, and can be connected to an appropriate waste gas absorption or treatment device for environmental protection treatment, ensuring the safety and environmental friendliness of the operation process.

[0034] After the reaction is complete, discharge and reset operations are required. First, stop the servo motor 6 to stop the rotation of the stirring frame 15, stirring blades and scraper 16. Then turn off the water pump 22 and heating pipe 23 to stop heating and circulation. After the material temperature drops to a safe range, open the valve 13 on the discharge pipe 12. The slurry after the reaction is discharged and collected through the discharge pipe 12 under the action of gravity. After the discharge is completed, close the valve 13. If the equipment needs to be cleaned, the cleaning solvent can be injected again from the feed pipe 1004, the stirring system can be started briefly for cleaning, and then the waste liquid can be discharged to reset the equipment and prepare for the next operation.

Claims

1. A powder surface passivation treatment device, characterized in that, The components include a base plate (1), a column (2), a tank body (3), a connecting rod (5), a servo motor (6), a coupling (7), a rotating shaft (8), a top cover (9), (1001), a spare pipe (1002), a waste discharge pipe (1003), a feeding pipe (1004), a protective cover (11), an inner cylinder (14), a discharge pipe (12), a valve (13), a mixing rack (15), a scraper (16), and a heating assembly. The top of the base plate (1) is fixedly connected to the column (2). (1) Mounting brackets are fixed on both sides of the top, and a tank body (3) is fixedly connected between the two mounting brackets. A connecting rod (5) is fixedly connected to the upper part of the column (2). A servo motor (6) is fixedly connected to the right side of the connecting rod (5). The output shaft of the servo motor (6) passes through the connecting rod (5) and is fixedly connected to a coupling (7). A rotating shaft (8) is fixedly sleeved at the bottom of the coupling (7). A top cover (9) is fixedly connected to the top of the tank body (3). A connecting pipe is connected to and communicates with the annular array on the top of the top cover (9). (1001), spare pipe (1002), waste discharge pipe (1003) and feeding pipe (1004), the top of the connecting pipe (1001), spare pipe (1002), waste discharge pipe (1003) and feeding pipe (1004) are all connected to a protective cover (11) by a flange. The tank body (3) is fitted with an inner cylinder (14). The rotating shaft (8) passes through the top cover (9) to the inside of the inner cylinder (14). The bottom side of the inner cylinder (14) is connected to and communicates with a discharge pipe (12). The material pipe (12) extends out of the tank body (3) on the right and is connected to the valve (13). The middle of the rotating shaft (8) is fixedly fitted with a stirring frame (15). Multiple stirring blades are fixedly arranged in a ring array on the outside of the stirring frame (15). Multiple through holes are opened on each stirring blade. One side of each stirring blade is in contact with the inner wall of the inner cylinder (14). A scraper (16) is fixedly fitted at the bottom of the rotating shaft (8). The bottom of the scraper (16) is in contact with the bottom of the inner cylinder (14). A heating component is provided at the top of the bottom plate (1).

2. The powder surface passivation treatment equipment according to claim 1, characterized in that, The connecting pipe (1001), the spare pipe (1002), the waste discharge pipe (1003) and the feeding pipe (1004) are all connected to the inner cylinder (14).

3. The powder surface passivation treatment equipment according to claim 2, characterized in that, The valve (13) is made of polytetrafluoroethylene.

4. A powder surface passivation treatment device according to claim 3, characterized in that, It also includes reinforcing rings (4), and reinforcing rings (4) are fixedly fitted on both sides of the middle part of the column (2). Both reinforcing rings (4) are fixedly fitted on the outer wall of the tank (3).

5. A powder surface passivation treatment device according to claim 4, characterized in that, Both the tank body (3) and the inner cylinder (14) are made of high borosilicate glass.

6. A powder surface passivation treatment apparatus according to claim 5, characterized in that, The heating assembly includes a constant temperature water tank (17), an inlet pipe (20), a drain pipe (21), a water supply pipe (19), a water pump (22), a heating pipe (23), and a sealing cover (24). The constant temperature water tank (17) is fixedly connected to the top of the base plate (1). A cavity is formed between the tank body (3) and the inner cylinder (14). The inlet pipe (20) is connected to the front of the tank body (3). The drain pipe (21) is connected to the left of the tank body (3). The left side of the drain pipe (21) is connected to the rear of the constant temperature water tank (17). The water supply pipe (19) is connected to the front of the inlet pipe (20). The water supply pipe (19) is inserted into the constant temperature water tank (17) and connected to the water pump (22). The heating pipe (23) is fixedly connected inside the constant temperature water tank (17). The top of the constant temperature water tank (17) is connected to a riser. A sealing cover (24) is placed on the top of the riser.

7. A powder surface passivation treatment apparatus according to claim 6, characterized in that, Both the inlet pipe (20) and the outlet pipe (21) are connected to the cavity.

8. A powder surface passivation treatment apparatus according to claim 7, characterized in that, It also includes a temperature controller (18) and a temperature sensor (25). The temperature controller (18) is fixedly connected to the front of the constant temperature water tank (17). The heating tube (23) is electrically connected to the temperature controller (18). The spare tube (1002) is fixedly connected to the temperature sensor (25). The temperature sensor (25) is electrically connected to the temperature controller (18).

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