A powder feeding device for preventing powder aggregation in an aerosol

Abstract

The present application provides a kind of powder agglomeration aerosol powder feeding device, including aerosol generating chamber and mixing mechanism, and the mixing mechanism includes rack, driving mechanism, mixing tank, first transmission assembly and material adding mechanism.By driving mechanism driving mounting frame reciprocating swing, and by second transmission assembly driving intermittent opening of material discharge slot of file lever, it makes gas phase alumina powder intermittent into yttria powder raw material, effectively avoid the self-agglomeration of gas phase alumina powder produced by one-time addition, facilitate the realization of uniform single particle coating of gas phase alumina powder on the surface of yttria powder, mix evenly, improve the electrostatic inhibition effect, at the same time, mixing tank reciprocating swing and rotation are carried out shaftless tumbling stirring, which can reduce the generation of static electricity, avoid the shaft sticking, agglomeration of gas phase alumina powder, improve the utilization rate of gas phase alumina powder, and there is no strong shear, which will not cause the gas phase alumina powder to be dispersed again after uniform coating on the surface of yttria powder raw material, ensure the performance stability of mixed powder.

Description

Technical Field

[0001] This invention specifically relates to a powder feeding device for preventing powder agglomeration. Background Technology

[0002] Aerosol deposition technology, as an advanced process for preparing high-density ceramic coatings at room temperature, has been widely used in the field of plasma etching resistance protection for semiconductor process components. This technology utilizes a high-pressure carrier gas to carry submicron-sized ceramic powder to form an aerosol, which is then transported at high speed through a powder feeding pipe under pressure difference and bombards the substrate to achieve coating deposition. The dispersion state, electrostatic level, and mixing uniformity of the powder during the transportation process directly determine the coating density, grain size, and defect rate.

[0003] During the powder conveying process, since the raw material powder is mostly submicron ceramic powder such as yttrium oxide, when it is conveyed at high speed in the PU powder conveying pipe, the particles frequently rub against the pipe wall and between particles, generating a large amount of static electricity. This causes the powder to adhere to the pipe wall, resulting in uneven conveying and pipe blockage, which affects the spraying stability. Therefore, the industry usually adds fumed alumina powder to yttrium oxide powder as a static electricity inhibitor to improve the static electricity and agglomeration problems.

[0004] However, the existing aerosol powder feeding devices typically use a one-time feeding and shaft stirring method for mixing. The fumed alumina powder is prone to agglomeration due to the one-time addition, which makes it impossible to form a uniform single-particle coating on the surface of yttrium oxide particles. This results in uneven mixing and a significant reduction in the electrostatic suppression effect. At the same time, shaft stirring not only exacerbates the frictional charging of powder, causing sticking to the shaft and secondary agglomeration, but also generates strong shearing force that destroys the already formed coating structure, affecting the stability of the mixed powder performance. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes an anti-powder agglomeration aerosol powder feeding device. This device effectively reduces the generation of static electricity, prevents fumed alumina powder from sticking to the shaft and agglomerating, effectively improves the utilization rate of fumed alumina powder, and avoids strong shearing, thus preventing the fumed alumina powder from being dispersed again after being uniformly coated on the surface of yttrium oxide powder raw materials, ensuring the performance stability of the mixed powder.

[0006] A powder feeding device for preventing powder agglomeration includes an aerosol generation chamber and a mixing mechanism, wherein the mixing mechanism includes: A frame is mounted on the aerosol generating chamber, and a mounting bracket is rotatably mounted on the frame; A drive mechanism is mounted on the frame and connected to the mounting bracket, used to drive the mounting bracket to reciprocate. A mixing tank is rotatably mounted on the mounting frame, and a discharge valve that can communicate with the aerosol generation chamber is provided at the bottom of the mixing tank. A first transmission assembly, connecting the frame, the mounting bracket, and the mixing tank, is used to convert the reciprocating oscillation of the mounting bracket into the reciprocating rotation of the mixing tank; and The feeding mechanism includes a stop bar and a second transmission assembly. The mixing tank has a storage chamber and a mixing chamber coaxially arranged from top to bottom. The bottom of the storage chamber has a discharge trough that communicates with the top of the mixing chamber. The stop bar is slidably disposed at the top of the mixing chamber and seals the bottom of the discharge trough. The second transmission assembly connects the frame and the stop bar and is used to convert the reciprocating swing of the mounting frame into the intermittent reciprocating movement of the stop bar to intermittently open the discharge trough.

[0007] The beneficial effects of the above-mentioned powder agglomeration prevention aerosol powder feeding device are as follows: By placing fumed alumina powder and yttrium oxide powder in a specific ratio into a storage chamber and a mixing chamber, respectively, a drive mechanism drives a mounting frame to reciprocate. This reciprocating motion of the mounting frame, via a second transmission component, drives a stop lever to intermittently open the discharge chute. This allows fumed alumina powder to be intermittently added to the yttrium oxide powder, effectively preventing self-agglomeration caused by a single addition of the fumed alumina powder. This facilitates uniform single-particle coating of the fumed alumina powder on the yttrium oxide powder surface, ensuring even mixing and improving electrostatic suppression. The mounting frame reciprocates, causing the mixing tank to reciprocate. This reciprocating motion, along with the first transmission component, drives the mixing tank to rotate. This reciprocating motion of the mixing tank, along with its rotation, performs shaftless tumbling and stirring of the fumed alumina powder and yttrium oxide powder raw materials within the mixing chamber. Shaftless tumbling and stirring effectively reduces static electricity generation, prevents fumed alumina powder from sticking to the shaft and agglomerating, and effectively improves the utilization rate of fumed alumina powder. Furthermore, the absence of strong shearing prevents the fumed alumina powder from being dispersed again after being uniformly coated on the surface of the yttrium oxide powder raw materials, ensuring the performance stability of the mixed powder.

[0008] In one embodiment, the drive mechanism includes a gear, a rack, a motor, and a turntable; the gear is coaxially mounted on the rotating shaft of the mounting frame, the rack is slidably mounted on the frame and meshes with the gear, the motor is mounted on the frame and its output end is coaxially connected to the turntable, a dial shaft is eccentrically mounted on the turntable, a dial groove is formed on the rack, and the dial shaft is slidably mounted in the dial groove.

[0009] In one embodiment, the drive mechanism further includes an adjustment component, which includes a screw; a limiting groove is formed at one end of the turntable, one end of the dial shaft is slidably disposed in the limiting groove along the radial direction of the turntable, the screw is rotatably disposed in the limiting groove and threadedly engaged with the dial shaft, and the screw is arranged parallel to the limiting groove.

[0010] In one embodiment, the first transmission assembly includes a bevel gear, a bevel gear ring, a first sprocket, a second sprocket, and a chain; the bevel gear is rotatably mounted on the mounting frame, the bevel gear ring is mounted on the frame and coaxial with the rotation axis of the mounting frame, the bevel gear meshes with the bevel gear ring, the first sprocket is coaxially mounted on the bevel gear, the second sprocket is coaxially mounted on the top of the mixing tank, and the first sprocket and the second sprocket are connected by the chain.

[0011] In one embodiment, the feeding mechanism further includes a guide column; the guide column is coaxially slidably disposed at the top of the mixing tank, and the bottom end of the guide column extends through the storage cavity into the mixing cavity; the stop bar is disposed on the periphery of the guide column; the second transmission assembly connects the frame and the guide column, and is used to convert the reciprocating swing of the mounting frame into the intermittent reciprocating movement of the guide column.

[0012] In one embodiment, the second transmission assembly includes a spring and an arc-shaped guide frame; the spring connects the guide post and the mixing tank to provide an upward thrust to the guide post; the arc-shaped guide frame is mounted on the frame and coaxial with the rotation axis of the mounting frame; the inner side of the arc-shaped guide frame is provided with multiple sets of arc-shaped protrusions evenly spaced along its arc direction, and each set of arc-shaped protrusions can abut against the top of the guide post to provide a downward thrust to the guide post.

[0013] In one embodiment, multiple sets of discharge troughs are evenly spaced along the circumference of the storage cavity, and multiple sets of baffles are evenly spaced along the circumference of the guide post, with each set of baffles corresponding to one set of discharge troughs.

[0014] In one embodiment, the feeding mechanism further includes a mounting sleeve, levers, and a third transmission assembly. The mounting sleeve is sleeved on the guide post and rotatably disposed at the top of the storage cavity. Multiple sets of levers are evenly arranged circumferentially along the bottom periphery of the mounting sleeve, and the bottom surfaces of the multiple sets of levers contact the bottom surface of the storage cavity. The third transmission assembly connects the mounting sleeve and the guide post to convert the reciprocating movement of the guide post into the reciprocating rotation of the mounting sleeve.

[0015] In one embodiment, the third transmission component includes a guide ball; a spiral guide groove is provided on the periphery of the guide post, and the guide ball is provided on the inner side of the mounting sleeve, with the guide ball slidably disposed within the spiral guide groove.

[0016] In one embodiment, the frame is provided with an arc-shaped groove coaxial with the rotation axis of the mounting frame, and the mounting frame is provided with an arc-shaped slider coaxial with the rotation axis of the mounting frame, the arc-shaped slider being slidably disposed within the arc-shaped groove. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a three-dimensional structural diagram of an anti-powder agglomeration aerosol powder feeding device provided in an embodiment of the present invention; Figure 2 for Figure 1 An exploded view of a powder feeding device for preventing powder agglomeration is shown. Figure 3 for Figure 1 The diagram shows a three-dimensional structure of the mixing tank after being cut open in a powder feeding device for preventing powder agglomeration. Figure 4 for Figure 1 An exploded view of the drive mechanism in an anti-powder agglomeration aerosol powder feeding device is shown. Figure 5 for Figure 1 An exploded view of the regulating component in an anti-powder agglomeration aerosol powder feeding device is shown. Figure 6 for Figure 1 An exploded view of the first transmission component in a powder feeding device for preventing powder agglomeration. Figure 7 for Figure 1 An exploded view of the feeding mechanism in an anti-powder agglomeration aerosol powder feeding device is shown. Figure 8 for Figure 1 The diagram shown is an exploded view of the third transmission component in a powder feeding device for preventing powder agglomeration.

[0019] Figure label: 10. Frame; 101. Mounting bracket; 102. Arc-shaped slide rail; 103. Arc-shaped slider; 104. Connecting ring; 20. Mixing tank; 201. Discharge valve; 202. Storage chamber; 203. Mixing chamber; 204. Discharge chute; 205. Circular groove; 30. Stop lever; 301. Guide post; 3011. Guide rod; 302. Spring; 303. Arc-shaped guide frame; 304. Arc-shaped protrusion; 305. Mounting sleeve; 306. Toggle lever; 307. Guide ball; 308. Spiral guide groove; 40. Gear; 401. Rack; 402. Motor; 403. Turntable; 404. Shaft; 405. Slot; 406. Screw; 407. Limiting slot; 50. Bevel gear; 501. Bevel gear ring; 502. First sprocket; 503. Second sprocket; 504. Chain. Detailed Implementation

[0020] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore merely examples, and should not be construed as limiting the scope of protection of the present invention.

[0021] Please see Figures 1 to 3 One embodiment of an anti-powder agglomeration aerosol feeding device includes an aerosol generation chamber (not shown) and a mixing mechanism. The mixing mechanism includes a frame 10, a drive mechanism, a mixing tank 20, a first transmission component, and a feeding mechanism.

[0022] The machine frame 10 is mounted on the aerosol generation chamber, and a mounting frame 101 is rotatably mounted on the machine frame 10. A drive mechanism is mounted on the machine frame 10 and connected to the mounting frame 101, used to drive the mounting frame 101 to reciprocate. A mixing tank 20 is rotatably mounted on the mounting frame 101, and a discharge valve 201 that communicates with the aerosol generation chamber is provided at the bottom of the mixing tank 20. A first transmission assembly connects the machine frame 10, the mounting frame 101, and the mixing tank 20, used to convert the reciprocating oscillation of the mounting frame 101 into the reciprocating rotation of the mixing tank 20. The feeding mechanism includes a stop bar 30 and a second transmission assembly. The mixing tank 20 has a storage chamber 202 and a mixing chamber 203 coaxially arranged from top to bottom. The bottom of the storage chamber 202 has a discharge trough 204 that communicates with the top of the mixing chamber 203. The stop bar 30 is slidably disposed at the top of the mixing chamber 203 and seals the bottom of the discharge trough 204. The second transmission assembly connects the frame 10 and the stop bar 30 and is used to convert the reciprocating swing of the mounting frame 101 into the intermittent reciprocating movement of the stop bar 30 to intermittently open the discharge trough 204.

[0023] In the above embodiments, fumed alumina powder and yttrium oxide powder are placed in the storage chamber 202 and mixing chamber 203 respectively in a certain proportion. Then, the mounting frame 101 is driven to reciprocate by a drive mechanism. The reciprocating motion of the mounting frame 101 drives the stop bar 30 to move intermittently to open the discharge chute 204 intermittently. At this time, fumed alumina powder can be intermittently added to the yttrium oxide powder, effectively avoiding the self-agglomeration caused by the one-time addition of fumed alumina powder. This facilitates the uniform single-particle coating of fumed alumina powder on the surface of yttrium oxide powder, ensuring uniform mixing and improving electrostatic suppression. In addition to the control effect, the mounting frame 101 reciprocates and swings, driving the mixing tank 20 to reciprocate and rotate through the first transmission component. This causes the mixing tank 20 to reciprocate and rotate while swinging, thus performing shaftless tumbling and stirring of the fumed alumina powder and yttrium oxide powder raw materials in the mixing chamber 203. Shaftless tumbling and stirring can effectively reduce the generation of static electricity, prevent the fumed alumina powder from sticking to the shaft and agglomerating, effectively improve the utilization rate of fumed alumina powder, and without strong shear, it will not cause the fumed alumina powder to be dispersed again after being uniformly coated on the surface of the yttrium oxide powder raw material, ensuring the performance stability of the mixed powder.

[0024] Specifically, in the above embodiment, the frame 10 is provided with an arc-shaped groove 102 coaxial with the rotation axis of the mounting frame 101, and the mounting frame 101 is provided with an arc-shaped slider 103 coaxial with the rotation axis of the mounting frame 101. The arc-shaped slider 103 is slidably disposed within the arc-shaped groove 102. The cooperation between the arc-shaped slider 103 and the arc-shaped groove 102 can further improve the stability of the reciprocating oscillation of the mounting frame 101.

[0025] Specifically, in the above embodiment, both ends of the mounting bracket 101 are provided with connecting rings 104, and two sets of annular grooves 205 are coaxially formed on the periphery of the mixing tank 20. The two sets of annular grooves 205 are rotatably fitted onto the two sets of connecting rings 104. The cooperation between the two sets of connecting rings 104 and the two sets of annular grooves 205 ensures the stability of the mixing tank 20 when rotatably mounted on the mounting bracket 101.

[0026] Please see Figure 2 and Figure 4 In one embodiment, the drive mechanism includes a gear 40, a rack 401, a motor 402, and a turntable 403. The gear 40 is coaxially mounted on the rotating shaft of the mounting frame 101. The rack 401 is slidably mounted on the frame 10 and meshes with the gear 40. The motor 402 is mounted on the frame 10 and its output end is coaxially connected to the turntable 403. A dial shaft 404 is eccentrically mounted on the turntable 403. A dial groove 405 is provided on the rack 401, and the dial shaft 404 is slidably mounted in the dial groove 405.

[0027] In the above embodiment, the turntable 403 is driven to rotate by starting the motor 402. The rotation of the turntable 403 drives the rack 401 to move back and forth through the engagement of the dial shaft 404 and the dial slot 405. The reciprocating movement of the rack 401 meshes with the gear 40, which drives the gear 40 to rotate back and forth. The reciprocating rotation of the gear 40 drives the mounting bracket 101 to swing back and forth, which is convenient for driving the mounting bracket 101 to swing back and forth.

[0028] Please refer to the following: Figure 5 Based on the above embodiments, the drive mechanism further includes an adjustment component, which includes a screw 406; a limiting groove 407 is provided at one end of the turntable 403, and one end of the dial shaft 404 is slidably disposed in the limiting groove 407 along the radial direction of the turntable 403. The screw 406 is rotatably disposed in the limiting groove 407 and is threadedly engaged with the dial shaft 404. The screw 406 is arranged parallel to the limiting groove 407.

[0029] In the above embodiments, the rotating screw 406 can be threaded into the rotating shaft 404 to drive the rotating shaft 404 to move. The movement of the rotating shaft 404 can adjust the eccentricity of the rotating shaft 404 relative to the turntable 403. It can be understood that when the eccentricity of the rotating shaft 404 increases, the rotation of the turntable 403 increases the reciprocating movement of the rack 401 driven by the rotating shaft 404 and the rotating groove 405, thereby increasing the degree to which the mounting frame 101 drives the mixing tank 20 to swing back and forth. Conversely, when the eccentricity of the rotating shaft 404 decreases, the degree to which the mounting frame 101 drives the mixing tank 20 to swing back and forth decreases, thereby facilitating the adjustment of the tumbling and stirring force according to the mixing requirements and improving the practicality of the device.

[0030] Please see Figure 1 , Figure 2 and Figure 6 In one embodiment, the first transmission assembly includes a bevel gear 50, a bevel gear ring 501, a first sprocket 502, a second sprocket 503, and a chain 504. The bevel gear 50 is rotatably mounted on the mounting frame 101, the bevel gear ring 501 is mounted on the frame 10 and is coaxial with the rotation axis of the mounting frame 101, the bevel gear 50 meshes with the bevel gear ring 501, the first sprocket 502 is coaxially mounted on the bevel gear 50, the second sprocket 503 is coaxially mounted on the top of the mixing tank 20, and the first sprocket 502 and the second sprocket 503 are connected by the chain 504.

[0031] In the above embodiment, the reciprocating swing of the mounting bracket 101 drives the bevel gear 50 to reciprocate. The reciprocating swing of the bevel gear 50 meshes with the bevel gear ring 501, causing the bevel gear 50 to rotate reciprocally. The reciprocating rotation of the bevel gear 50 drives the first sprocket 502 to rotate reciprocally. The reciprocating rotation of the first sprocket 502 drives the second sprocket 503 to rotate reciprocally through the chain 504, thereby driving the mixing tank 20 to rotate reciprocally. Driving the mixing tank 20 to rotate reciprocally is convenient, requiring no additional operation or driving equipment, thus reducing the energy consumption of the device.

[0032] Please see Figure 1 , Figure 3 and Figure 7 In one embodiment, the feeding mechanism further includes a guide post 301; the guide post 301 is coaxially slidably disposed at the top of the mixing tank 20, and the bottom end of the guide post 301 extends through the storage cavity 202 into the mixing cavity 203; the stop bar 30 is disposed around the guide post 301; the second transmission assembly connects the frame 10 and the guide post 301, and is used to convert the reciprocating swing of the mounting frame 101 into the intermittent reciprocating movement of the guide post 301.

[0033] Specifically, the second transmission component includes a spring 302 and an arc-shaped guide frame 303; the spring 302 connects the guide post 301 and the mixing tank 20 to provide an upward thrust on the guide post 301; the arc-shaped guide frame 303 is mounted on the frame 10 and is coaxial with the rotation axis of the mounting frame 101; multiple sets of arc-shaped protrusions 304 are evenly spaced along the arc direction on the inner side of the arc-shaped guide frame 303, and the multiple sets of arc-shaped protrusions 304 can all abut against the top of the guide post 301 to provide a downward thrust on the guide post 301.

[0034] In the above embodiment, when the mixing tank 20 reciprocates, the mixing tank 20 drives the guide column 301 to reciprocate. The reciprocating swing of the guide column 301 allows it to contact or separate from multiple sets of arc-shaped protrusions 304. When the guide column 301 contacts the arc-shaped protrusions 304, the arc-shaped protrusions 304 squeeze the guide column 301, causing the guide column 301 to move downward and the spring 302 to be compressed and contracted. When the guide column 301 separates from the arc-shaped protrusions 304, the reaction force of the spring 302 drives the guide column 301 to move upward and reset. This converts the reciprocating swing of the mixing tank 20 into the intermittent reciprocating movement of the guide column 301, which is convenient and requires no additional operation or driving equipment.

[0035] Specifically, in the above embodiment, two sets of guide rods 3011 are arranged opposite each other on the periphery of the guide post 301. The two sets of guide rods 3011 are slidably disposed at the top of the mixing tank 20. A spring 302 is sleeved on each set of guide rods 3011, with the two ends of the spring 302 abutting against the top of the guide rod 3011 and the top of the mixing tank 20, respectively. Through the sliding cooperation between the two sets of guide rods 3011 and the mixing tank 20, the stability of the sliding of the guide post 301 is ensured, and rotation is avoided. The guide rods 3011 can guide the extension and retraction of the spring 302, extending the service life of the spring 302.

[0036] Furthermore, multiple sets of discharge troughs 204 are evenly spaced along the circumference of the storage chamber 202, and multiple sets of baffles 30 are evenly spaced along the circumference of the guide column 301. Each set of baffles 30 corresponds one-to-one with a set of discharge troughs 204. By evenly arranging multiple sets of discharge troughs 204 around the circumference, it is easier to uniformly feed the fumed alumina powder in the storage chamber 202 into the yttrium oxide powder raw material in the mixing chamber 203, further improving the mixing uniformity.

[0037] Please see Figure 3 , Figure 7 and Figure 3 In one embodiment, the feeding mechanism further includes a mounting sleeve 305, a lever 306, and a third transmission assembly. The mounting sleeve 305 is sleeved on the guide post 301 and is rotatably disposed at the top of the storage cavity 202. Multiple sets of levers 306 are evenly arranged along the circumference of the bottom end of the mounting sleeve 305. The bottom surfaces of the multiple sets of levers 306 are in contact with the bottom surface of the storage cavity 202. The third transmission assembly connects the mounting sleeve 305 and the guide post 301 to convert the reciprocating movement of the guide post 301 into the reciprocating rotation of the mounting sleeve 305.

[0038] In the above embodiment, when the guide column 301 reciprocates and drives the mounting sleeve 305 to reciprocate and rotate through the third transmission component, the reciprocating rotation of the mounting sleeve 305 can drive the multiple sets of levers 306 to reciprocate and rotate. The reciprocating rotation of the multiple sets of levers 306 can move the fumed alumina powder in the storage chamber 202, thereby facilitating the fumed alumina powder to be fed into the mixing chamber 203 from the multiple sets of discharge troughs 204, avoiding the accumulation phenomenon.

[0039] Please see Figure 8 In one embodiment, the third transmission component includes a guide ball 307; a spiral guide groove 308 is provided around the guide post 301, and a guide ball 307 is provided inside the mounting sleeve 305, with the guide ball 307 slidably disposed within the spiral guide groove 308.

[0040] In the above embodiment, the reciprocating movement of the guide post 301 drives the reciprocating movement of the spiral guide groove 308. The reciprocating movement of the spiral guide groove 308 compresses the guide ball 307, which in turn causes the guide ball 307 to drive the mounting sleeve 305 to rotate reciprocally. Driving the mounting sleeve 305 to rotate reciprocally is convenient and requires no additional operation or driving equipment.

[0041] The specific implementation method of the above-mentioned anti-powder agglomeration aerosol powder feeding device is as follows: By placing fumed alumina powder and yttrium oxide powder in a certain proportion in the storage chamber 202 and mixing chamber 203 respectively, and then starting the motor 402 to drive the turntable 403 to rotate, the rotation of the turntable 403 drives the rack 401 to reciprocate through the engagement of the dial shaft 404 and the dial groove 405. The reciprocating movement of the rack 401 meshes with the gear 40, driving the gear 40 to reciprocate. The reciprocating rotation of the gear 40 drives the mounting frame 101 to swing back and forth. The reciprocating swing of the mounting frame 101 drives the guide column 301 to swing back and forth through the mixing tank 20. The reciprocating swing of the guide column 301 intermittently abuts or separates from multiple sets of arc-shaped protrusions 304, thereby driving the guide column 301 to move intermittently back and forth. The intermittent reciprocating movement of the guide column 301 drives multiple sets of stop levers 30 to move back and forth. The multiple discharge troughs 204 are intermittently opened, allowing fumed alumina powder to be added to the yttrium oxide powder raw material. This effectively avoids the self-agglomeration caused by the one-time addition of fumed alumina powder, facilitating uniform single-particle coating of fumed alumina powder on the surface of the yttrium oxide powder, ensuring uniform mixing, and improving the electrostatic suppression effect. Furthermore, the reciprocating movement of the guide column 301, through the spiral guide groove 308, compresses the guide ball 307, causing the guide ball 307 to drive the mounting sleeve 305 to reciprocate. The reciprocating rotation of the mounting sleeve 305 drives the multiple levers 306 to reciprocate. The reciprocating rotation of the multiple levers 306 moves the fumed alumina powder in the storage chamber 202, thus facilitating the addition of fumed alumina powder from the multiple discharge troughs 204 into the mixing chamber 203 and preventing accumulation.

[0042] Simultaneously, the reciprocating oscillation of the mounting frame 101 drives the bevel gear 50 to reciprocate. The reciprocating oscillation of the bevel gear 50 engages with the bevel gear ring 501, causing the bevel gear 50 to rotate reciprocally. The reciprocating rotation of the bevel gear 50 drives the first sprocket 502 to rotate reciprocally. The reciprocating rotation of the first sprocket 502 drives the second sprocket 503 to rotate reciprocally via the chain 504, thereby driving the mixing tank 20 to rotate reciprocally. This reciprocating oscillation and rotation of the mixing tank 20 performs shaftless tumbling and stirring of the fumed alumina powder and yttrium oxide powder raw materials in the mixing chamber 203. Shaftless tumbling and stirring can effectively reduce the generation of static electricity, prevent the fumed alumina powder from sticking to the shaft and agglomerating, effectively improve the utilization rate of fumed alumina powder, and without strong shearing, it will not cause the fumed alumina powder to be dispersed again after being uniformly coated on the surface of the yttrium oxide powder raw material, ensuring the performance stability of the mixed powder.

[0043] On the other hand, the screw 406 can be rotated to engage with the dial 404, which in turn drives the dial 404 to move. The movement of the dial 404 can adjust the eccentricity of the dial 404 relative to the turntable 403. It can be understood that when the eccentricity of the dial 404 increases, the rotation of the turntable 403 increases the reciprocating movement of the rack 401 driven by the engagement of the dial 404 and the dial groove 405, thereby increasing the degree to which the mounting frame 101 drives the mixing tank 20 to oscillate back and forth. Conversely, when the eccentricity of the dial 404 decreases, the degree to which the mounting frame 101 drives the mixing tank 20 to oscillate back and forth decreases. This makes it easier to adjust the tumbling and stirring force according to the mixing requirements and improves the practicality of the device.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A powder feeding device for preventing powder agglomeration, characterized in that, It includes an aerosol generation chamber and a mixing mechanism, wherein the mixing mechanism includes: A frame (10) is installed on the aerosol generating chamber, and a mounting bracket (101) is rotatably provided on the frame (10). A drive mechanism is provided on the frame (10) and connected to the mounting bracket (101) for driving the mounting bracket (101) to swing back and forth. A mixing tank (20) is rotatably mounted on the mounting frame (101), and a discharge valve (201) that can communicate with the aerosol generation chamber is provided at the bottom of the mixing tank (20). A first transmission assembly, connecting the frame (10), the mounting bracket (101), and the mixing tank (20), is used to convert the reciprocating oscillation of the mounting bracket (101) into the reciprocating rotation of the mixing tank (20); and The feeding mechanism includes a stop bar (30) and a second transmission assembly. The mixing tank (20) has a storage chamber (202) and a mixing chamber (203) coaxially arranged from top to bottom inside. The bottom of the storage chamber (202) has a discharge trough (204) that communicates with the top of the mixing chamber (203). The stop bar (30) is slidably disposed at the top of the mixing chamber (203) and seals the bottom of the discharge trough (204). The second transmission assembly connects the frame (10) and the stop bar (30) and is used to convert the reciprocating swing of the mounting frame (101) into the intermittent reciprocating movement of the stop bar (30) so as to intermittently open the discharge trough (204).

2. The powder feeding device for preventing powder agglomeration according to claim 1, characterized in that, The drive mechanism includes a gear (40), a rack (401), a motor (402), and a turntable (403); the gear (40) is coaxially mounted on the rotating shaft of the mounting bracket (101), the rack (401) is slidably mounted on the frame (10) and meshes with the gear (40), the motor (402) is mounted on the frame (10) and its output end is coaxially connected to the turntable (403), a dial shaft (404) is eccentrically mounted on the turntable (403), a dial groove (405) is provided on the rack (401), and the dial shaft (404) is slidably mounted in the dial groove (405).

3. The powder feeding device for preventing powder agglomeration according to claim 2, characterized in that, The drive mechanism further includes an adjustment component, which includes a screw (406); a limiting groove (407) is provided at one end of the turntable (403), and one end of the dial shaft (404) is slidably disposed in the limiting groove (407) along the radial direction of the turntable (403). The screw (406) is rotatably disposed in the limiting groove (407) and threadedly engaged with the dial shaft (404). The screw (406) is arranged parallel to the limiting groove (407).

4. The powder feeding device for preventing powder agglomeration according to claim 1, characterized in that, The first transmission assembly includes a bevel gear (50), a bevel ring (501), a first sprocket (502), a second sprocket (503), and a chain (504). The bevel gear (50) is rotatably mounted on the mounting frame (101), the bevel ring (501) is mounted on the frame (10) and is coaxial with the rotation axis of the mounting frame (101), the bevel gear (50) meshes with the bevel ring (501), the first sprocket (502) is coaxially mounted on the bevel gear (50), the second sprocket (503) is coaxially mounted on the top of the mixing tank (20), and the first sprocket (502) and the second sprocket (503) are connected by the chain (504).

5. The powder feeding device for preventing powder agglomeration according to claim 1, characterized in that, The feeding mechanism also includes a guide column (301); the guide column (301) is slidably disposed coaxially at the top of the mixing tank (20), and the bottom end of the guide column (301) extends through the storage cavity (202) into the mixing cavity (203). The stop bar (30) is disposed around the guide column (301). The second transmission assembly connects the frame (10) and the guide column (301) to convert the reciprocating swing of the mounting frame (101) into the intermittent reciprocating movement of the guide column (301).

6. The powder feeding device for preventing powder agglomeration according to claim 5, characterized in that, The second transmission assembly includes a spring (302) and an arc-shaped guide frame (303); the spring (302) connects the guide post (301) and the mixing tank (20) to provide an upward thrust to the guide post (301); the arc-shaped guide frame (303) is mounted on the frame (10) and is coaxial with the rotation axis of the mounting frame (101); the inner side of the arc-shaped guide frame (303) is provided with multiple sets of arc-shaped protrusions (304) evenly spaced along its arc direction; the multiple sets of arc-shaped protrusions (304) can all abut against the top of the guide post (301) to provide a downward thrust to the guide post (301).

7. The powder feeding device for preventing powder agglomeration according to claim 5, characterized in that, The discharge trough (204) is evenly spaced in multiple sets along the circumference of the storage cavity (202), and the baffle (30) is evenly spaced in multiple sets along the circumference of the guide column (301). The multiple sets of baffle (30) and the multiple sets of discharge trough (204) correspond one-to-one.

8. The powder feeding device for preventing powder agglomeration according to claim 7, characterized in that, The feeding mechanism further includes a mounting sleeve (305), a lever (306), and a third transmission assembly. The mounting sleeve (305) is sleeved on the guide post (301) and rotatably disposed at the top of the storage cavity (202). Multiple sets of levers (306) are evenly arranged along the circumference of the bottom side of the mounting sleeve (305). The bottom surfaces of the multiple sets of levers (306) are in contact with the bottom surface of the storage cavity (202). The third transmission assembly connects the mounting sleeve (305) and the guide post (301) to convert the reciprocating movement of the guide post (301) into the reciprocating rotation of the mounting sleeve (305).

9. The powder feeding device for preventing powder agglomeration according to claim 8, characterized in that, The third transmission component includes a guide ball (307); a spiral guide groove (308) is provided on the periphery of the guide post (301), and the guide ball (307) is provided on the inner side of the mounting sleeve (305), and the guide ball (307) is slidably disposed in the spiral guide groove (308).

10. The powder feeding device for preventing powder agglomeration according to claim 1, characterized in that, The frame (10) is provided with an arc-shaped slide groove (102) coaxial with the rotation axis of the mounting bracket (101), and the mounting bracket (101) is provided with an arc-shaped slider (103) coaxial with the rotation axis of the mounting bracket (101), and the arc-shaped slider (103) is slidably disposed in the arc-shaped slide groove (102).

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