Anti-settling structure and stirring device for nano slurry

Abstract

The application provides an anti-settling structure and stirring device for nano slurry, and belongs to the technical field of nano material preparation, which comprises a tank body assembly, a central rotating drum assembly, an ultrasonic vibration rod, an anti-settling lifting mechanism, a dynamic material distributing assembly, a lifting type stirring mechanism and a scraper assembly; the central rotating assembly is located at the bottom of the main tank body and generates a centrifugal shear field through rotation; the ultrasonic dispersion assembly is arranged on the rotating disc and utilizes high-frequency vibration to break the particle agglomeration; the scraper assembly is attached to the anti-settling lifting mechanism and can be lifted along with the stirring process; the high-activity anti-settling area is formed in the center of the tank body through the cooperation of the rotating disc rotation and the ultrasonic wave, and the flow dead zone is eliminated; meanwhile, the scraper assembly can be lifted flexibly according to the process requirement, and only contacts the bottom wall of the main tank body for cleaning when needed, so that the abrasion and energy consumption caused by continuous scraping are avoided, the micro-deagglomeration and macro anti-settling of the nano slurry are realized, and the dispersion stability of the slurry and the coating quality are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of nanomaterial preparation technology, and in particular to an anti-settling structure and stirring device for nano-slurry. Background Technology

[0002] Nanoparticle slurry, a key raw material for infrared radiation energy-saving coatings in high-temperature heating furnaces, is a solid-liquid suspension system composed of nanoscale functional powders (TiO2, ZrO2, Al2O3, SiC, etc.), inorganic high-temperature binders, dispersants, and solvents. After being coated onto the inner wall of the heating furnace, this slurry, through drying and sintering, forms a high-emissivity (ε>0.85) infrared radiation coating, significantly improving furnace heat exchange efficiency and reducing energy consumption. However, the solid particles in the nanoparticle slurry have a large specific surface area and high surface energy, making them prone to agglomeration and sedimentation under the combined effects of gravity and van der Waals forces. According to Stokes' law, particle settling velocity is proportional to the square of the particle size. Once nanoparticles agglomerate to the micrometer scale, the settling velocity increases by hundreds to tens of thousands of times, leading to uneven solid content distribution in the slurry. In severe cases, this can form an irreversible hard deposition layer at the bottom of the tank, directly affecting the coating quality.

[0003] Currently, the commonly known anti-settling mixing devices mainly use mechanical stirring combined with a circulating pump to achieve macroscopic mixing of the slurry. For example, the slurry at the bottom is transported to the top of the tank through an external circulation pipeline. Although this solution can slow down macroscopic settling to some extent, it has the following shortcomings: First, the stirring effect of existing devices is limited to the overall macroscopic circulation under traditional mechanical conveying, lacking a means to deagglomerate nanoparticles at the microscopic level. The shear force generated by mechanical stirring is limited and cannot effectively break the van der Waals forces and liquid bridging between particles. As a result, nanoparticles continue to agglomerate during stirring, and the sedimentation rate remains high. Second, there is a fluid dead zone at the conical bottom of the tank. Existing equipment only has a fixed suction port at the bottom of the tank, which cannot effectively remove the deposit layer attached to the bottom wall. After long-term operation, the deposit layer gradually hardens and is difficult to redisperse by conventional stirring. Third, if an independent scraper assembly is added to the bottom of the tank to remove sediment, a double-layer coaxial structure is required to drive the stirring blades and scrapers separately. This results in a complex shaft system, difficulty in sealing, and continuous scraping by the scrapers causing wear on the tank walls and shortening their own lifespan. Summary of the Invention

[0004] One of the objectives of this invention is to provide an anti-settling structure for nano-slurry, which can achieve synchronous changes in the rotation of the variable amplitude spiral guide vane and the reciprocating movement of the corner distribution pipe, thereby achieving uniform material distribution with non-fixed trajectory anti-settling.

[0005] The present invention is achieved through the following technical solution: an anti-settling structure for nano-slurry, comprising a tank assembly, a central rotating cylinder assembly, an anti-settling lifting mechanism, and a dynamic dispensing assembly; The tank assembly includes a main tank and a central rotating cylinder assembly includes a rotating cylinder. The rotating cylinder is located in the middle of the main tank and its bottom opening communicates with the inner cavity of the main tank. The rotating cylinder can rotate automatically. The anti-settlement lifting mechanism includes a variable amplitude spiral guide vane, and the dynamic material distribution component includes a path guide plate. A central shaft is also screwed into the inner center of the main tank. The variable amplitude spiral guide vane is arranged on the outer circular surface of the central shaft and located in the inner cavity of the rotating drum. Corrugated pipes are evenly connected to the upper end of the cavity wall of the rotating drum. The outer end of each set of corrugated pipes is connected to a corner-type material distribution pipe, and the corner-type material distribution pipe slides elastically in the radial direction toward the central shaft. The path guide plate is fixed to the upper end of the outer circular surface of the central shaft. Rollers are installed at the inner top of the corner-type material distribution pipe, and each roller makes rolling contact with the outer edge of the path guide plate. The outlet height of the corner-type material distribution pipe is always higher than the liquid surface of the nano-slurry.

[0006] The main body assembly also includes a can lid, a discharge pipe, and a base frame. The can lid is attached to the top of the main tank body. A first inlet port is fixed to the top of the side wall of the main tank body, and a second inlet port is fixed to the bottom of the side wall of the can lid. The bottom of the main tank body is fixed to the top of the base frame, and the discharge pipe is connected to the bottom wall of the main tank body.

[0007] The central rotating drum assembly also includes a turntable and support columns. The bottom wall of the main tank is provided with a stepped seat, and a sealed bearing is installed in the stepped seat. The outer ring of the sealed bearing is fixed in the stepped seat. The outer circular surface of the turntable is interference-fitted with the inner ring of the sealed bearing. The bottom end of the outer wall of the rotating drum is fixedly connected to the top end of the turntable by evenly distributed support columns. A hollow shaft is connected to the middle of the bottom end of the turntable. A first rotary motor is fixedly installed in the inner frame of the base frame. The bottom end of the hollow shaft is fixedly connected to the output shaft of the first rotary motor.

[0008] The anti-settlement lifting mechanism also includes a second rotary motor, which is fixedly installed on the outer top of the tank cover. A top rotating seat is fixedly installed in the middle of the top of the tank cover. The top of the central shaft is screwed out of the top rotating seat and fixedly connected to the output shaft of the second rotary motor. An inner connecting rotating seat is fixedly installed in the middle of the top of the rotating drum. The central shaft is screwed into the inner cavity of the rotating drum from the inner connecting rotating seat and fixedly connected to the variable amplitude spiral guide vane. A bottom rotating seat is also fixedly installed in the middle of the top of the turntable. The bottom end of the central shaft is screwed to the bottom rotating seat. The central shaft rotates within a set speed range.

[0009] The dynamic material distribution assembly also includes translation guide sleeves and compression springs. Material distribution pipe seats are uniformly fixed to the upper end of the cavity wall of the rotating drum. The inlet of the bellows is connected to the outlet of the material distribution pipe seat. Translation guide rods are uniformly fixed to the outer top of the rotating drum. The outer ends of each translation guide rod are jointly fixed with an outer retaining ring. The translation guide sleeve is fixed to the outer top of the corner-type material distribution pipe. The translation guide sleeves on the same side are slidably connected to the translation guide rods. A compression spring is sleeved on the outer side of each group of translation guide rods. One end of the compression spring is locked with the inner ring of the outer retaining ring, and the other end is locked with the translation guide sleeve. The roller is installed on the inner top of the translation guide sleeve.

[0010] Another object of the present invention is to provide a stirring device, which further includes an ultrasonic vibrating rod, a lifting stirring mechanism, and a scraper assembly; The ultrasonic vibrating bar includes an ultrasonic transducer, wires, and conductive slip rings. Transmitting heads are evenly installed in the main body of the turntable. The flange face of the transmitting head is fitted to the corresponding mounting position in the turntable. The amplitude transformer at the head end of the ultrasonic transducer is fixed to the transmitting head. The transmitting head is a multi-step cylindrical structure. A conductive slip ring is installed and fixed in the bottom inner hole of the hollow shaft. The wires connected to each group of ultrasonic transducers pass through the side wall of the hollow shaft and are connected to the conductive slip ring.

[0011] The lifting stirring mechanism includes lifting slides, inner connecting rings, double-eared rotating seats, cylinder moving rotating seats, and swirl grooves. Lifting slides are uniformly fixed to the upper end of the outer wall of the rotating cylinder. Inner connecting rings are fixed to the axially arranged lifting slides. The upper ends of the lifting slides on the same side are slidably connected to the lifting slides. Stirring rods are uniformly fixed to the outside of each set of inner connecting rings. A top fixing ring is fixed between the top ends of each lifting slide. The central shaft passes through the center of the top fixing ring. Swirl grooves are opened on the outer cylindrical surface of the main body at the top of the top fixing ring. Double-eared rotating seats are screwed into the swirl grooves. A cylinder fixing rotating seat is fixed to the top of the tank lid. A cylinder fixing rotating shaft is inserted into each set of cylinder fixing rotating seats. The top end of the main body of the cylinder moving rotating seat is screwed to the cylinder fixing rotating shaft. Lifting cylinders are symmetrically fixed to the top of the double-eared rotating seats. The bottom end of the cylinder moving rotating seat push rod on the same side is screwed to the lifting cylinder. Soft conductive sleeves are also uniformly installed and fixed in each set of inner connecting rings.

[0012] The scraper assembly includes a scraper blade, and a scraper bar is fixed to the outside of a set of inner connecting rings near the bottom of the main tank. The scraper blade is fixed to the bottom end of the scraper bar.

[0013] By adopting the above technical solution, the present invention can achieve the following beneficial effects: (1) The present invention significantly improves the mixing efficiency and dispersion stability of nano-slurry by using a structure design that allows the variable amplitude spiral guide plate and dynamic material distribution component to change at the same frequency. The small pitch at the bottom of the variable amplitude spiral guide plate generates stronger axial thrust, which effectively prevents slurry sedimentation. The path guide plate drives the corner-type material distribution pipe to move radially back and forth, realizing uniform material distribution on a non-fixed trajectory. The synchronous change of the two ensures the dynamic matching of the conveying flow rate and the material distribution frequency, avoiding accumulation and energy waste. Its overall structure is simple and ingenious, with no dead corners in mixing and greatly improving the uniformity of stirring. It is suitable for the efficient dispersion treatment of high viscosity and easily precipitated nano-materials. (2) The combination of ultrasonic vibrating rod and lifting stirring mechanism realizes the dual functions of macroscopic stirring with the rotation of the stirring rod and microscopic ultrasonic dispersion with the transmitter head. The lifting and lowering action of the components consisting of lifting slide rod, inner connecting ring and top solid ring is driven by the cylinder moving seat, so that the soft conductive sleeve switches between the large and small cross sections of the transmitter head, realizing the transmission and cut-off of ultrasonic energy between the stirring rods, so that the ultrasonic waves can cover the entire main tank after diffusion through the stirring rod, eliminating the dead angle of ultrasonic action; when the soft conductive sleeve returns to the small cross section of the transmitter head, the energy transmission is released, and the device performs pure mechanical stirring of the stirring rod, and the transmitter head maintains basic ultrasonic action in the limited space of the main tank; it can be changed according to the needs of the process stage, so as to avoid the overheating of slurry and energy waste caused by high power operation throughout the process, and improve the adaptability of the device to multi-stage mixing process. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the tank assembly of the present invention; Figure 3 This is a cross-sectional view of the central rotating drum assembly of the present invention; Figure 4 This is a schematic diagram of the drive structure of the hollow shaft portion of the present invention; Figure 5 This is a schematic diagram of the installation of the ultrasonic vibrating rod part of the present invention; Figure 6 This is a schematic diagram of the drive part of the anti-settlement lifting mechanism of the present invention; Figure 7 This is a cross-sectional view of the variable amplitude spiral guide vane portion of the present invention; Figure 8 This is a schematic diagram of the installation structure of the translation guide rod part of the present invention; Figure 9 This is a schematic diagram of the transmission structure of the dynamic material distribution component of the present invention; Figure 10 This is a schematic diagram of the installation structure of the lifting stirring mechanism of the present invention; Figure 11 This is a schematic diagram of the structure of the stirring rod and scraper assembly of the present invention; Figure 12 This is a schematic diagram of the structure of the double-ear rotating seat part of the present invention; Figure 13 This is a schematic diagram of the structure of the soft conductive sleeve and the transmitter head of the present invention.

[0016] Figure label: 1. Tank assembly; 2. Central rotating drum assembly; 3. Ultrasonic vibrator; 4. Anti-settling lifting mechanism; 5. Dynamic material distribution assembly; 6. Lifting mixing mechanism; 7. Scraper assembly; 101. Main tank; 102. Tank cover; 103. First inlet port; 104. Second inlet port; 105. Discharge pipe; 106. Base frame; 201. Stepped seat; 202. Sealed bearing; 203. Turntable; 204. Hollow shaft; 205. Rotating drum; 206. Support column; 207. First rotary motor; 301. Ultrasonic transducer; 302. Transmitter head; 303. Wire; 304. Conductive slip ring; 401. Second rotary motor; 402. Top rotating seat; 403. Central shaft ; 404, Inner connecting swivel seat; 405, Amplitude variable spiral guide vane; 406, Bottom swivel seat; 501, Distributor pipe seat; 502, Corrugated pipe; 503, Translation guide rod; 504, Outer retaining ring; 505, Corner type distributor pipe; 506, Translation guide sleeve; 507, Compression spring; 508, Path guide plate; 509, Roller; 601, Lifting slide seat; 602, Lifting slide rod; 603, Inner connecting ring; 604, Stirring rod; 605, Top retaining ring; 606, Double-ear swivel seat; 607, Cylinder-fixed swivel seat; 608, Lifting cylinder; 609, Cylinder-moving swivel seat; 610, Soft conductive sleeve; 611, Swirl groove; 612, Cylinder-fixed swivel shaft; 701, Scraper rod; 702, Scraper. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] Example 1: Examples of mechanical anti-settling measures implemented in the mixing process of nano-slurries according to this invention Figures 1-9 As shown; The main tank 101 in the tank assembly 1 is made of 316L stainless steel. The rotating cylinder 205 in the central rotating cylinder assembly 2 is located in the middle of the main tank 101, and the bottom opening of the rotating cylinder 205 communicates with the inner cavity of the main tank 101. The rotating cylinder 205 can rotate automatically. A central shaft 403 is also screwed into the inner center of the main tank 101. A variable amplitude spiral guide vane 405 is arranged on the outer circular surface of the central shaft 403 and located in the inner cavity of the rotating drum 205. The pitch of the variable amplitude spiral guide vane 405 increases from bottom to top. The purpose is to set the small pitch at the bottom of the rotating drum 205 to provide greater thrust. The upper end of the cavity wall of the rotating drum 205 is uniformly connected with bellows 502. The outer end of each set of bellows 502 is connected with a corner-type material distribution pipe 505 with the outlet facing downward. The corner-type material distribution pipe 505 slides elastically in the radial direction toward the central axis 403. The path guide disk 508 is fixed to the upper end of the outer circle surface of the central axis 403. The inner top end of the corner-type material distribution pipe 505 is equipped with a roller 509, and each roller 509 rolls and contacts the outer edge of the path guide disk 508. Furthermore, the outlet height of the corner-type feed pipe 505 is always higher than the liquid surface of the nano-slurry.

[0020] The specific structures of tank assembly 1 and central rotating cylinder assembly 2 are as follows: Figure 2 , Figure 3 and Figure 4 As shown, the can lid 102 is attached to the top of the main tank 101. The top of the side wall of the main tank 101 is fixedly connected to the first inlet port 103, and the bottom of the side wall of the can lid 102 is fixedly connected to the second inlet port 104. After the can lid 102 and the main tank 101 are connected in place, the second inlet port 104 and the first inlet port 103 are engaged in place to form an inlet channel and are connected to the external feeding system. The outer bottom of the main tank 101 is fixedly connected to the top of the base frame 106. The base frame 106 is used to form a support for the tank assembly 1 and to connect with the mounting surface. The discharge pipe 105 is connected to the bottom wall of the main tank 101 and is equipped with a valve, which is normally closed and only opens when discharging or cleaning. The bottom wall of the main tank 101 is provided with a stepped seat 201, and a sealed bearing 202 is installed in the stepped seat 201. The outer ring of the sealed bearing 202 is fixed in the stepped seat 201. The outer circular surface of the turntable 203 is interference-fitted with the inner ring of the sealed bearing 202. The bottom end of the outer wall of the rotating cylinder 205 and the top end of the turntable 203 are fixedly connected by evenly distributed support columns 206. A hollow shaft 204 is connected to the bottom center of the turntable 203; The first rotary motor 207 is fixedly installed in the inner frame of the base frame 106, and the bottom end of the hollow shaft 204 is fixedly connected to the output shaft of the first rotary motor 207. The first rotary motor 207 is connected to an external control system and can drive the rotating drum 205 to rotate slowly and at a uniform speed. The stirring device is connected to the outer wall of the rotating drum 205.

[0021] The specific structures of the anti-settlement lifting mechanism 4 and the dynamic material distribution component 5 are as follows: Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the second rotary motor 401 is fixedly installed on the outer top end of the can lid 102. A top screw seat 402 is fixedly installed in the middle of the top end of the can lid 102. The top end of the central shaft 403 is screwed out of the top screw seat 402 and then fixedly connected to the output shaft of the second rotary motor 401. An inner connecting seat 404 is fixedly installed at the top center of the rotating drum 205. The central shaft 403 is screwed into the inner cavity of the rotating drum 205 from the inner connecting seat 404 and then fixedly connected to the variable amplitude spiral guide plate 405. A bottom rotating seat 406 is also installed and fixed at the top center of the turntable 203, and the bottom end of the central shaft 403 is screwed to the bottom rotating seat 406; the second rotary motor 401 is also connected to the external control system and can drive the central shaft 403 to rotate within a set speed range. The upper end of the cavity wall of the rotating drum 205 is uniformly fixed with a material distribution pipe seat 501, and the inlet of the bellows 502 is connected to the outlet of the material distribution pipe seat 501. Translation guide rods 503 are uniformly fixed to the outer top end of the rotating drum 205. The outer ends of each translation guide rod 503 are jointly fixed with an outer retaining ring 504. Translation guide sleeves 506 are fixed to the outer top end of the corner-type material distribution pipe 505. The translation guide sleeves 506 on the same side are slidably connected to the translation guide rods 503. The guide part of the translation guide rods 503 is suspended above the top end of the rotating drum 205 to provide sliding space for the translation guide sleeves 506. Each set of translation guide rods 503 is fitted with a compression spring 507 on the outside. One end of the compression spring 507 is locked to the inner ring of the outer retaining ring 504, and the other end is locked to the translation guide sleeve 506, which enables the translation guide sleeve 506 to bounce toward the path guide disk 508. The roller 509 is installed at the inner top of the translation guide sleeve 506. Under the elastic support of the compression spring 507, it can overcome the elastic deformation force formed by the bellows 502 itself, so that the roller 509 can always roll in contact with the outer curved surface of the path guide disk 508. Thus, when the central shaft 403 drives the path guide disk 508 to rotate, the cooperation formed by the path of the outer curved surface of the path guide disk 508 and the roller 509 can drive the translation guide sleeve 506 and the corner-type distributing pipe 505 to overcome the elastic support force of the compression spring 507 and the bellows 502. According to the changes formed by the roller 509 along the undulating path of the outer curved surface of the path guide disk 508, the corner-type distributing pipe 505 is driven to form a regular reciprocating movement.

[0022] The working principle is as follows: The nano-slurry comprises at least one nano-functional powder selected from TiO2 (30nm), ZrO2 (50nm), Al2O3 (40nm), and SiC (100nm), accounting for 25-35% by mass; an inorganic high-temperature binder composed of silica sol (SiO2 content 30%) or aluminum dihydrogen phosphate solution, accounting for 12-18% by mass; an expansion coefficient regulator composed of α-Al2O3 micro powder (μm level) or zircon sand powder, accounting for 5-8% by mass; a dispersant composed of sodium polyacrylate (PAA-Na) or sodium hexametaphosphate, accounting for 0.5-1.5% by mass; and the remainder is deionized water as a solvent. The nano slurry to be stirred is added to the top of the self-contained tank 101, and the added volume will not exceed the outlet position of the corner-type dispensing pipe 505. After the equipment is started, the first rotary motor 207 drives the drum 205 to rotate slowly and uniformly, thereby driving the stirring device connected to its outer wall to mix and stir the slurry in the main tank 101 as a whole; at the same time, the second rotary motor 401 drives the central shaft 403 to rotate. Since both the variable amplitude spiral guide vane 405 and the path guide disk 508 are fixedly connected to the central shaft 403, the change in the rotational speed of the central shaft 403 will directly affect the operating state of the variable amplitude spiral guide vane 405 and the path guide disk 508, forming a strict relative relationship: When the second rotary motor 401 increases the rotational speed of the central shaft 403, the rotational speed of the variable amplitude spiral guide vane 405 also increases, thereby generating a greater axial conveying speed and improving the circulation efficiency of the bottom slurry. At the same time, the rotational speed of the path guide disk 508 also increases synchronously, which in turn increases the radial reciprocating frequency and speed of the corner distribution pipe 505. Conversely, when the rotational speed of the central shaft 403 decreases, the conveying speed of the slurry and the reciprocating speed of the corner distribution pipe 505 also decrease synchronously. The variable-amplitude spiral guide vane 405 and the corner distribution pipe 505 are ensured to change speed at the same frequency. When the bottom of the main tank 101 needs strong anti-settling, the upper corner distribution pipe 505 must move back and forth at a high frequency to ensure that the large amount of slurry that rushes up can be quickly and evenly distributed to various radial areas in the main tank 101, avoiding accumulation or mixing dead corners caused by excessive local flow. Conversely, when the conveying flow of the variable-amplitude spiral guide vane 405 is reduced, the corner distribution pipe 505 reduces the frequency of reciprocating movement, which can ensure that the slurry can still be evenly spread by the corner distribution pipe 505 at low flow, and also reduce unnecessary energy loss and mechanical wear. During the rotation of the central shaft 403, the variable amplitude spiral guide vane 405 rotates accordingly. Thanks to its structure where the pitch increases from bottom to top, the small pitch at the bottom of the variable amplitude spiral guide vane 405 can generate a large axial thrust, effectively drawing the nano slurry deposited at the bottom of the main tank 101 into the rotating drum 205 and lifting it upward, thus achieving anti-settling and internal circulation. As the central shaft 403 continues to rotate, the path guide disk 508 rotates synchronously. The undulating curved surface of the outer edge of the path guide disk 508 maintains rolling contact with the roller 509 installed at the top of the corner-type material distribution pipe 505. Under the elastic support of the compression spring 507, the roller 509 always moves closely to the contour of the path guide disk 508. The curved contour of the path guide disk 508 drives the roller 509, the translation guide sleeve 506 and the corner-type material distribution pipe 505 to overcome the elastic force of the compression spring 507 and the bellows 502, so that the corner-type material distribution pipe 505 moves radially back and forth regularly along the translation guide rod 503. This dynamic material distribution action allows the slurry lifted to the top of the rotating drum 205 to enter the corner-type distribution pipe 505 and then disperse back into the main tank 101 along a changing radial trajectory. This non-fixed trajectory distribution method can fully disrupt the original flow field of the slurry and greatly improve the mixing, dispersion and stability of the nano slurry.

[0023] Example 2: Examples of macroscopic mechanical stirring and microscopic ultrasonic cavitation of nano-slurries achieved by this invention. Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown; The ultrasonic transducer 301 in the ultrasonic vibrating rod 3 converts high-frequency electrical energy into high-frequency mechanical vibration, with a set power of 1000-2000W and a frequency of 20kHz-40kHz. Transmitter heads 302 are evenly installed in the main body of turntable 203. The flange face of the transmitter head 302 is fitted to the corresponding installation position in turntable 203. The amplitude rod at the head end of the ultrasonic transducer 301 is fixedly connected to the coaxial transmitter head 302. The transmitter head 302 is a multi-step cylindrical structure. The amplitude transformer is an intermediate component connecting the ultrasonic transducer 301 and the transmitter 302, and is usually machined as a whole from TC4 titanium alloy. The launch head 302 is the working end that is directly inserted into the slurry, and its material is also selected as a titanium alloy that is resistant to corrosion and cavitation corrosion. A conductive slip ring 304 is installed and fixed in the bottom inner hole of the hollow shaft 204. The wires 303 connected to each group of ultrasonic transducers 301 pass through the side wall of the hollow shaft 204 and are connected to the rotor of the conductive slip ring 304. The stator of the conductive slip ring 304 is connected to the external control system, so that the rotation of the hollow shaft 204 will not interfere with or have an adverse effect on the electrical connection and control between the control system and each group of ultrasonic transducers 301. By setting up an ultrasonic vibrating rod 3, the problem of micro-agglomeration of nano-slurry due to van der Waals forces during stirring can be solved. By utilizing the high-frequency cavitation effect generated by the ultrasonic transducer 301 and the transmitter 302 in the main tank 101, the nano-slurry is continuously dispersed at a micro level, which can effectively break up the micro-agglomerates of nanoparticles and solve the technical problem that traditional mechanical stirring cannot eliminate agglomerates. At the same time, with the design of the conductive slip ring 304, the ultrasonic transducer 301 and the transmitter 302 can achieve non-interference continuous ultrasonic treatment while rotating with the turntable 203, ensuring that the material is micro-homogenized while being macro-circulated and mixed, which significantly improves the dispersion stability and sheet quality of the nano-slurry. The lifting stirring mechanism 6 is a stirring device connected to the outer wall of the rotating drum 205. The upper end of the outer wall of the rotating drum 205 is uniformly fixed with the lifting slide 601. The lifting slide rods 602 are uniformly distributed and axially arranged with inner connecting rings 603. The upper end of the lifting slide rods 602 on the same side is slidably connected to the lifting slide 601. Each set of inner connecting rings 603 is uniformly fixed with stirring rods 604. The stirring rods 604 serve as the specific execution parts for stirring and mixing. A top-fixed ring 605 is fixed between the top ends of each lifting slide rod 602. The central shaft 403 passes through the center of the top-fixed ring 605, so that the top-fixed ring 605 will not interfere with the rotation of the central shaft 403. A swivel groove 611 is opened on the outer cylindrical surface of the main body of the top-fixed ring 605. The double-eared swivel seat 606 is screwed into the swivel groove 611. The top end of the can cover 102 is integrally fixed with a cylinder fixed swivel seat 607. A cylinder fixed swivel shaft 612 is inserted in each set of cylinder fixed swivel seats 607. The top end of the main body of the cylinder moving swivel seat 609 is screwed to the cylinder fixed swivel shaft 612. Lifting cylinders 608 are symmetrically fixed at the top end of the double-eared swivel seat 606. The bottom end of the push rod of the cylinder moving swivel seat 609 on the same side is screwed to the lifting cylinder 608. The cylinder moving seat 609 is connected to an external control system. Existing technology can ensure the synchronization of the two cylinders and drive the double-ear rotating seat 606 to move up and down stably and safely by writing a suitable control program to control the action time and sequence of the solenoid valve of the cylinder moving seat 609. Since the double-eared rotating seat 606 is spun to the rotating groove 611, it can realize the rotation of the component composed of the lifting slide rod 602, the inner connecting ring 603 and the top fixing ring 605 with the rotating cylinder 205, and can also realize its lifting action based on the lifting slide 601. Each set of inner connecting rings 603 also has a soft conductive sleeve 610 evenly installed and fixed in it; The transmitter head 302 has a stepped cylindrical structure, which can amplify the amplitude by changing the cross section. After the lifting stirring mechanism 6 is set, the transmitter head 302 is inserted into the soft conductive sleeve 610. With the lifting and lowering of each set of lifting slide rods 602 and inner connecting rings 603, the soft conductive sleeve 610 can move to the large cross section cylinder of the transmitter head 302 and fit with it. It can also move to the small cross section cylinder of the transmitter head 302 and not contact it. When the soft conductive sleeve 610 covers the large cross section of the transmitter head 302, the ultrasonic energy can be efficiently transmitted to each set of stirring rods 604 through the interference fit. When the soft conductive sleeve 610 retracts to the small cross section of the transmitter head 302, the direct transmission of ultrasonic energy between the transmitter head 302 and the stirring rods 604 is cut off. The components consisting of the lifting slide rod 602, the inner connecting ring 603, and the top fixing ring 605 rotate with the rotating drum 205, and can also achieve the lifting action based on the lifting slide 601. This not only enables the stirring rod 604 to stir and mix at different heights within the main tank 101, but also allows the ultrasonic energy to diffuse more directly to different positions within the main tank 101 when the soft conductive sleeve 610 is fitted onto the large cross-section of the transmitter head 302.

[0024] Example 3: Examples of cleaning and scraping the bottom wall of the main tank 101 according to the present invention Figure 1 , Figure 10 , Figure 11 and Figure 13 As shown; The scraper assembly 7 is a mechanical cleaning structure. When used with the ultrasonic vibrating rod 3, it can achieve a more delicate cleaning operation. A scraper rod 701 is fixed to the outside of a set of inner connecting rings 603 near the bottom of the main tank 101. The scraper 702 is fixed to the bottom end of the scraper rod 701. Furthermore, both the scraper 702 and the turntable 203 are made of tungsten carbide or zirconium oxide ceramic material. This is because the nanoparticles have extremely high hardness. Using the above-mentioned ultra-hard and wear-resistant material can significantly reduce the wear caused by long-term scraping and rotation, while avoiding metal shavings from mixing into the slurry and causing pollution. This allows the scraper assembly 7 to move up and down with the inner connecting ring 603. During daily stirring, the scraper assembly 7 moves to a position where it does not contact the sides of the bottom wall of the main tank 101. At this time, the scraper 702 will not scrape and clean the bottom wall of the main tank 101, which can significantly reduce mechanical wear and extend the service life of the scraper 702 and the main tank 101. The scraper assembly 7 only descends to the working position to perform scraping operation when it is only necessary to clean the sediment at the bottom of the main tank 101 or during the discharge stage. This ensures that the device can both clean the bottom of the main tank 101 and maintain operational stability. In addition, the large-section cylindrical part and the small-section cylindrical part of the transmitter head 302 are staggered, which allows the large-section and small-section ranges at different heights within the safe stroke range of the components consisting of the lifting slide rod 602, the inner connecting ring 603 and the top fixing ring 605. This allows the stirring rod 604 to not only form a stirring action at different heights, but also to form a diffusion action on the ultrasonic waves transmitted to it at different heights. Furthermore, when the scraper 702 descends to the scraping and cleaning position, the soft conductive sleeve 610 is precisely in interference fit with the large cross-section of the transmitter head 302 at this height position. This allows the ultrasonic energy to act on the deposition area at the bottom of the main tank 101 when the scraper 702 descends to the bottom of the main tank 101 for scraping, forming a dual effect of mechanical scraping and ultrasonic cavitation. This thoroughly removes the dead corners at the bottom of the main tank 101 and prevents the high-viscosity nano-slurry from clumping and hardening at the bottom. Although the scraper assembly 7 is limited by its structure and cannot cover the area where the turntable 203 and the rotating drum 205 are located, this area is not a dead zone. Rather, it is a highly active area formed by the active rotation of the turntable 203, the ultrasonic cavitation of the emitter head 302, and the vertical convection formed by the rotating drum 205. Its anti-caking ability is much higher than that of the edge of the bottom wall of the main tank 101. Therefore, the intervention of the scraper assembly 7 is not required, and the slurry will never settle and caking in this area.

[0025] Furthermore, the present invention incorporates corresponding sealing measures at key assembly locations involving both dynamic and static sealing. For example, the sealing bearing 202 at the connection between the turntable 203 and the stepped seat 201, the assembly locations of the main tank 101 and the tank cover 102, the assembly locations of the first feed inlet 103 and the second feed inlet 104, and other locations involving sealing are all equipped with corresponding sealing components (such as skeleton oil seals, sealing gaskets, etc.). This comprehensive sealing design not only ensures the cleanliness of the slurry preparation environment but also effectively extends the service life of transmission components and electrical components.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; 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; and these 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.

Claims

1. A sedimentation prevention structure for nano-slurry, comprising a tank assembly (1), characterized in that: It also includes a central rotating drum assembly (2), an anti-settlement lifting mechanism (4), and a dynamic material distribution assembly (5); The tank assembly (1) includes a main tank (101), and the central rotating cylinder assembly (2) includes a rotating cylinder (205). The rotating cylinder (205) is located in the middle of the main tank (101), and the bottom opening of the rotating cylinder (205) communicates with the inner cavity of the main tank (101). The rotating cylinder (205) can rotate automatically. The anti-settlement lifting mechanism (4) includes a variable amplitude spiral guide vane (405), and the dynamic material distribution component (5) includes a path guide plate (508). A central shaft (403) is also screwed into the inner center of the main tank (101). The variable amplitude spiral guide vane (405) is arranged on the outer circular surface of the central shaft (403) and located in the inner cavity of the rotating drum (205). Corrugated pipes (502) are evenly connected to the upper end of the cavity wall of the rotating drum (205). The outer end of each set of corrugated pipes (502) is connected to a... The corner-type dispensing pipe (505) slides elastically in the radial direction toward the central axis (403). The path guide disk (508) is fixed to the upper end of the outer circle surface of the central axis (403). Rollers (509) are installed at the inner top of the corner-type dispensing pipe (505), and each roller (509) rolls and contacts the outer edge of the path guide disk (508). The outlet height of the corner-type dispensing pipe (505) is always higher than the liquid surface of the nano slurry.

2. The anti-settling structure for nano-slurry according to claim 1, characterized in that: The tank assembly (1) also includes a tank cover (102), a discharge pipe (105), and a base frame (106). The tank cover (102) is attached to the top of the main tank (101). A first inlet port (103) is fixedly connected to the top of the side wall of the main tank (101). A second inlet port (104) is fixedly connected to the bottom of the side wall of the tank cover (102). The bottom of the main tank (101) is fixedly connected to the top of the base frame (106). The discharge pipe (105) is connected to the bottom wall of the main tank (101).

3. The anti-settling structure for nano-slurry according to claim 2, characterized in that: The central rotating drum assembly (2) also includes a turntable (203) and a support column (206). The bottom wall of the main tank (101) is provided with a stepped seat (201). A sealed bearing (202) is installed in the stepped seat (201). The outer ring of the sealed bearing (202) is fixed in the stepped seat (201). The outer circular surface of the turntable (203) is interference-fitted with the inner ring of the sealed bearing (202). The bottom end of the outer wall of the rotating drum (205) is fixed to the top end of the turntable (203) by evenly distributed support columns (206). A hollow shaft (204) is connected to the middle of the bottom end of the turntable (203). A first rotary motor (207) is fixedly installed in the inner frame of the base frame (106). The bottom end of the hollow shaft (204) is fixedly connected to the output shaft of the first rotary motor (207).

4. A sedimentation prevention structure for nano-slurry according to claim 2 or 3, characterized in that: The anti-settlement lifting mechanism (4) also includes a second rotary motor (401), which is fixedly installed on the outer top of the tank cover (102). A top rotating seat (402) is fixedly installed in the middle of the top of the tank cover (102). The top of the central shaft (403) is screwed out of the top rotating seat (402) and fixedly connected to the output shaft of the second rotary motor (401). An inner connecting rotating seat (404) is fixedly installed in the middle of the top of the drum (205). The central shaft (403) is screwed into the inner cavity of the drum (205) from the inner connecting rotating seat (404) and fixedly connected to the variable amplitude spiral guide plate (405). A bottom rotating seat (406) is also fixedly installed in the middle of the top of the turntable (203). The bottom end of the central shaft (403) is screwed to the bottom rotating seat (406). The central shaft (403) rotates within a set speed range.

5. A sedimentation prevention structure for nano-slurry according to any one of claims 1 to 3, characterized in that: The dynamic material distribution assembly (5) also includes a translation guide sleeve (506) and a compression spring (507). A material distribution pipe seat (501) is uniformly fixed to the upper end of the cavity wall of the rotating drum (205). The inlet of the bellows (502) is connected to the outlet of the material distribution pipe seat (501). Translation guide rods (503) are uniformly fixed to the outer top end of the rotating drum (205). An outer retaining ring (504) is fixed to the outer end of each translation guide rod (503). (506) is fixed to the outer top of the corner-type material distribution pipe (505). The translation guide sleeve (506) on the same side is slidably connected to the translation guide rod (503). Each group of translation guide rods (503) is fitted with a compression spring (507) on the outer side. One end of the compression spring (507) is locked to the inner ring of the outer ring (504), and the other end is locked to the translation guide sleeve (506). The roller (509) is installed on the inner top of the translation guide sleeve (506).

6. A stirring device, comprising the anti-settling structure for nano-slurry as described in any one of claims 3 to 5, characterized in that: It also includes an ultrasonic vibrating rod (3), which includes an ultrasonic transducer (301), a wire (303) and a conductive slip ring (304). Transmitting heads (302) are evenly installed in the main body of the turntable (203). The flange of the transmitting head (302) is fitted to the corresponding installation position in the turntable (203). The amplitude rod at the head end of the ultrasonic transducer (301) is fixed to the transmitting head (302). The transmitting head (302) is a multi-step cylindrical structure. A conductive slip ring (304) is installed and fixed in the bottom inner hole of the hollow shaft (204). The wire (303) connected to each group of ultrasonic transducers (301) passes through the side wall of the hollow shaft (204) and is connected to the conductive slip ring (304).

7. A stirring device according to claim 6, characterized in that: It also includes a lifting stirring mechanism (6), which includes a lifting slide rod (602), an inner connecting ring (603), a double-eared rotating seat (606), a cylinder moving rotating seat (609), and a rotating groove (611). The upper end of the outer wall of the rotating drum (205) is uniformly fixed to the lifting slide rod (601). The axial arrangement of the uniformly distributed lifting slide rods (602) is fixed to the inner connecting ring (603). The upper end of the lifting slide rod (602) on the same side is slidably connected to the lifting slide rod (601). The outside of each set of inner connecting rings (603) is uniformly fixed to the stirring rod (604). The top ends of each lifting slide rod (602) are fixed to each other. 605), the central shaft (403) passes through the center of the top ring (605), the swivel groove (611) is opened on the outer cylindrical surface of the main body of the top ring (605), the double-ear swivel seat (606) is screwed into the swivel groove (611), the top of the can cover (102) is fixed with a cylinder swivel seat (607), each set of cylinder swivel seats (607) is inserted with a cylinder swivel shaft (612), the top of the main body of the cylinder moving swivel seat (609) is screwed with the cylinder swivel shaft (612), the top of the double-ear swivel seat (606) is symmetrically fixed with a lifting cylinder (608), the bottom end of the push rod of the cylinder moving swivel seat (609) on the same side is screwed with the lifting cylinder (608).

8. The stirring device according to claim 7, characterized in that: Each inner connecting ring (603) is also evenly fitted with a soft conductive sleeve (610).

9. A stirring device according to claim 7 or 8, characterized in that: It also includes a scraper assembly (7), which includes a scraper (702). A scraper rod (701) is fixed to the outside of a set of inner connecting rings (603) near the bottom of the main tank (101), and the scraper (702) is fixed to the bottom end of the scraper rod (701).

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