A high viscosity slurry mixing tank

Abstract

The application discloses a high-viscosity slurry stirring tank, which comprises a barrel arranged on a rack, a stirring head arranged in the barrel, a discharge transition bin with a diameter matched with that of the barrel and communicated with one end of the barrel close to the ground, a sliding door plate group arranged at the connecting position of the discharge transition bin and the barrel, and a discharge pipeline with a discharge pump and communicated with one end of the discharge transition bin close to the ground, wherein the discharge transition bin is connected with or separated from the barrel by opening or closing the sliding door plate group. The application can realize continuous stirring, smooth discharging and continuous discharging of high-viscosity slurry, solve the problem of wall sticking of high-viscosity slurry, and is suitable for continuous automatic stirring and discharging of high-viscosity slurry with viscosity below 6 million cP.

Description

Technical Field

[0001] This invention relates to a mixing tank, specifically a mixing tank for high-viscosity slurry. Background Technology

[0002] The mixing process is the first step in lithium battery production, and its purpose is to mix and stir the positive and negative electrode materials of the lithium battery to form a slurry. The quality of the slurry directly affects the performance of the battery. With the development of lithium batteries, high-viscosity slurries with superior performance have been proposed, and their preparation also requires mixing.

[0003] Lithium battery cathode slurry mixing systems are generally fully automatic continuous mixing and conveying systems. They typically include a mixing tank with a mixing head inside. The mixing tank has an inlet at the end furthest from the ground and an outlet at the end closest to the ground. Valves are installed at both the inlet and outlet. This system is highly stable, does not come into contact with outside air, and ensures stable slurry quality.

[0004] The above-mentioned slurry mixing system is suitable for slurries with a viscosity of 5000-8000 cP. Therefore, when using the existing slurry mixing system to mix high-viscosity slurries, the slurry has a high viscosity and poor fluidity. The existing discharge port is small and cannot be automatically discharged by its own weight. Therefore, the slurry at the bottom of the mixing tank cannot be discharged smoothly. Summary of the Invention

[0005] To address the aforementioned shortcomings in the existing technology, the present invention aims to provide a high-viscosity slurry mixing tank, so as to enable the high-viscosity slurry to be smoothly discharged from the mixing tank.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a high-viscosity slurry mixing tank, comprising a barrel body mounted on a frame, wherein a stirring head is disposed in the barrel body, characterized in that: a discharge transition chamber adapted to the diameter of the barrel body is connected to the end of the barrel body near the ground, a sliding door panel assembly is disposed at the connection between the discharge transition chamber and the barrel body, and the discharge transition chamber is connected to or separated from the barrel body by opening or closing the sliding door panel assembly, and a discharge pipeline with a discharge pump is connected to the end of the discharge transition chamber near the ground.

[0007] As a limitation of the present invention: the discharge transition chamber is funnel-shaped, the discharge pipeline is connected to the small diameter end of the discharge transition chamber, and the discharge transition chamber is provided with a stirring paddle for stirring the slurry therein.

[0008] As a limitation of the present invention: the stirring paddle is fixed on the wall of the discharge transition chamber and is driven by the stirring paddle drive device.

[0009] As a limitation of the present invention: the discharge transition chamber is also provided with a stirring shaft along the direction of the discharge pipeline. The stirring shaft is driven by a stirring shaft drive device, and a rotating guide head is fixedly provided at one end of the stirring shaft facing the discharge pipeline.

[0010] As a limitation of the present invention: the sliding door panel assembly includes a sliding plate that is slidably disposed between the discharge transition chamber and the barrel body along the connection line between the discharge transition chamber and the barrel body, the sliding plate is connected to a sliding plate driving device, and the sliding plate is provided with a discharge hole position equal to the inner diameter of the barrel body; the sliding door panel assembly also includes an upper sealing plate and a lower sealing plate, and the sliding plate is sealed between the upper sealing plate and the lower sealing plate.

[0011] As a limitation of the present invention: the materials of the sliding plate, the upper sealing plate, and the lower sealing plate are any of the following.

[0012] a. The sliding plate, upper sealing plate and lower sealing plate are all made of solid self-lubricating material;

[0013] b. The sliding plate is made of solid self-lubricating material, and the upper sealing plate and lower sealing plate are made of metal material;

[0014] c. The sliding plate is made of metal, and the upper and lower sealing plates are made of solid self-lubricating material.

[0015] As a limitation of the present invention: the upper sealing plate is fixed on the side away from the ground on the lifting beam, and the lifting beam is fixed on the corresponding frame for fixing the barrel.

[0016] As a limitation of the present invention: the stirring head is located at the end of the barrel away from the ground, the barrel is cylindrical, and a scraping ring adapted to the inner wall of the barrel is provided at the end of the barrel away from the ground. The scraping ring is slidably arranged in the barrel along the height direction and is driven by a scraping ring driving device.

[0017] As a limitation of the present invention: a stirring head frame is provided at the end of the barrel away from the ground, and both the stirring head and the scraper ring drive device are provided on the stirring head frame. The scraper ring drive device includes a stroke device for moving the scraper ring along the height direction; the actuating end of the stroke device is connected to the scraper ring through a sliding optical shaft in the vertical direction, and the sliding optical shaft slidably and sealingly passes through the stirring head frame; the sliding optical shaft can be positioned in any of the following ways.

[0018] a. The stirring head frame has a hollow structure, and the stroke device and sliding optical shaft are both located inside the stirring head frame;

[0019] b. Both the stroke device and the sliding optical shaft are located outside the mixing head frame. The mixing head frame has an integral lower flange perpendicular to the axis of the mixing head frame at the end near the ground, and the sliding optical shaft passes through the lower flange.

[0020] As a limitation of the present invention: the frame includes a separate upper support and a mixing tank platform, the mixing head frame is set on the upper support, the tank body, the discharge transition chamber and the sliding door panel assembly are set on the mixing tank platform, the upper edge of the tank body is lower than the lower edge of the mixing head, the tank body platform is detachably set on the lifting device, and the tank body is lifted by the lifting device to realize the docking of the tank body and the mixing head frame.

[0021] By adopting the above technical solution, the beneficial effects achieved by the present invention compared with the prior art are as follows:

[0022] (1) This invention utilizes the non-Newtonian fluid characteristics of high-viscosity slurry, namely, shear thinning and improved fluidity upon heating, to enlarge the discharge port to match the diameter of the tank. The traditional flat-bottomed small-diameter discharge method with discharge valve is improved to a large-diameter funnel discharge method, ensuring the smooth flow of high-viscosity slurry. At the same time, a sliding door panel is set at the connection between the discharge transition chamber and the tank. The tank is closed during stirring and opened during discharge. The movable tank bottom ensures both the stirring effect and solves the problem of difficult discharge of high-viscosity slurry.

[0023] (2) The present invention designs the discharge transition chamber as a funnel structure and sets a stirring paddle and a rotating guide head in the discharge transition chamber, which can not only smoothly push the slurry into the pipeline, but also solve the problem of the slurry becoming jelly-like after standing for a period of time and being difficult to discharge.

[0024] (3) The present invention adds the design of scraper ring. The scraper ring is lowered with the liquid level when the material is discharged through the control system, so that there is no residue on the barrel wall and the phenomenon of slurry sticking to the wall is prevented. This makes the present invention more suitable for stirring and discharging high viscosity slurry.

[0025] In summary, this invention enables continuous stirring, smooth feeding, and continuous discharge of high-viscosity slurries, and solves the problem of high-viscosity slurries sticking to the wall. It is suitable for continuous automatic stirring and discharge of high-viscosity slurries with a viscosity of less than 6 million cP. Attached Figure Description

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] Figure 1 This is a schematic diagram of the non-pulping state of Embodiment 1 of the present invention;

[0028] Figure 2 This is a schematic diagram of the pulping state in Embodiment 1 of the present invention;

[0029] Figure 3 This is a three-dimensional structural diagram of the support frame (not shown) in Embodiment 1 of the present invention;

[0030] Figure 4This is a three-dimensional internal structure diagram of the support frame (not shown) in Embodiment 1 of the present invention;

[0031] Figure 5 This is a schematic diagram of the internal structure of the stirring paddle used to illustrate Embodiment 1 of the present invention;

[0032] Figure 6 This is a three-dimensional structural diagram of the stirring paddle in Embodiment 1 of the present invention;

[0033] Figure 7 This is a schematic diagram of the internal three-dimensional structure of the support (not shown) in Embodiment 2 of the present invention;

[0034] Figure 8 This is a partial internal structure diagram of Embodiment 2 of the present invention;

[0035] Figure 9 This is a schematic diagram of the internal three-dimensional structure of the support frame (not shown) in Embodiment 3 of the present invention;

[0036] Figure 10 This is a partial internal structure diagram of Embodiment 3 of the present invention;

[0037] Figure 11 This is a schematic diagram of the internal three-dimensional structure of the support (not shown) in Embodiment 4 of the present invention.

[0038] In the diagram: 1-Bucket body, 2-Upper support, 3-Mixing tank platform, 4-Discharge transition chamber, 5-Sliding door panel assembly, 51-Sliding plate, 52-Sliding plate drive device, 53-Upper sealing plate, 54-Lower sealing plate, 55-Door panel partition, 56-Lifting crossbeam, 6-Mixing head, 7-Discharge pump, 8-Discharge pipeline, 9-Mixing paddle, 10-Mixing paddle drive device, 11-Scraper ring, 12-Mixing head frame, 121-Mixing head frame lower flange, 13-Scraper ring drive device, 131-Stroke device, 132-Electric cylinder mounting plate, 133-Slider mounting plate, 134-Sliding optical shaft, 14-Mixing shaft, 15-Mixing shaft drive device, 151-Reducer servo motor, 152-Transmission shaft, 153-Sealing deflector, 154-Support frame, 155-Support frame mounting boss, 16-Rotating guide head, 17-Mixing tank upper support. Detailed Implementation

[0039] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the high-viscosity slurry mixing tank described herein is a preferred embodiment and is only used for illustration and explanation of the present invention, and does not constitute a limitation thereof.

[0040] The directional terms or positional relationships used in this invention, such as "up," "down," "left," and "right," are based on the positional relationships in the accompanying drawings of this invention. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component must have a specific orientation, or that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the content protected by this invention.

[0041] Example 1: A high-viscosity slurry mixing tank

[0042] This implementation example Figures 1-6 As shown, a high-viscosity slurry mixing tank includes a barrel 1 mounted on a frame, a stirring head 6 disposed in the barrel 1, a discharge transition chamber 4 with a diameter adapted to the barrel 1 connected to the end of the barrel 1 near the ground, a sliding door panel assembly 5 disposed at the connection between the discharge transition chamber 4 and the barrel 1, the discharge transition chamber 4 being connected to or separated from the barrel 1 by opening or closing the sliding door panel assembly 5, and a discharge pipeline 8 with a discharge pump 7 connected to the end of the discharge transition chamber 4 near the ground.

[0043] The frame includes a separate upper support 2 and a mixing tank platform 3. The mixing head 6 is mounted on the upper support 2, and the tank body 1, the discharge transition chamber 4, and the sliding door assembly 5 are mounted on the mixing tank platform 3. Figure 1 The image shows the non-pulping state of this embodiment. Figure 2 In this embodiment, the mixing tank platform 3 is detachably mounted on a lifting device (not shown in the diagram). When the lifting device is in the lowered state, the upper edge of the tank 1 is lower than the lower edge of the mixing head 6. The mixing tank platform 3 is lifted by the lifting device to connect the tank 1 and the mixing head 6. The lifting device can be any structure in the prior art that can lift the mixing tank platform 3. The mixing tank platform 3 is also equipped with casters on the ground-facing end for easy movement and routine maintenance. Alternatively, the frame can be an integrated structure of the upper support 2 and the mixing tank platform 3; this is not a limitation. In this embodiment, the mixing tank platform 3 is horizontally positioned, meaning the movement direction of the sliding door assembly 5 is perpendicular to the setting direction of the discharge pump 7. Alternatively, the mixing tank platform 3 can be rotated 90 degrees while the position of the slurry pump remains unchanged, or the movement direction of the sliding door assembly 5 is parallel to the setting direction of the discharge pump 7. This configuration significantly reduces the equipment width, making it suitable for workshops or factories with limited design space.

[0044] like Figure 3 , Figure 4 As shown, the barrel is cylindrical and is mounted on the support 17 on the mixing tank. The inner wall of the barrel is designed with a circulation channel to heat or cool the slurry inside the barrel. The medium circulates in the barrel wall through the cooling water inlet and outlet to achieve constant temperature control. A temperature sensor is installed on the barrel wall to monitor the barrel wall temperature and form negative feedback to form a closed-loop control of the temperature.

[0045] Due to the excessive viscosity of the slurry, the traditional flat bottom valve-type discharge method cannot discharge smoothly. This invention employs an enlarged discharge port, using a funnel-shaped discharge transition chamber 4 that matches the diameter of the barrel 1 for unloading. Specifically, the discharge transition chamber 4 is funnel-shaped, wider at the top and narrower at the bottom. The end of the discharge transition chamber 4 furthest from the ground has the same diameter as the barrel 1 and is connected to it. The middle of the discharge transition chamber 4 is conical. The end of the discharge transition chamber 4 facing the ground (the smaller diameter end) is connected to a discharge pipe 8. A discharge pump 7 is installed on one side of the discharge pipe 8 in the discharge direction. In this embodiment, the discharge pump 7 is a screw pump, but a cam rotor pump can also be used. The discharge pump 7 provides the power for the slurry to flow out. To ensure continuous automatic mixing and discharge without stopping, a sliding door panel assembly 5 is designed between the discharge transition chamber and the barrel 1.

[0046] The sliding door panel assembly 5 includes a sliding plate 51 slidably disposed between the discharge transition chamber 4 and the barrel 1 along the connection line between the discharge transition chamber 4 and the barrel 1. The sliding plate 51 is connected to a sliding plate drive device 52. The sliding plate drive device 52 includes two horizontal electric cylinders disposed on the mixing tank platform 3 and located on both sides of the sliding plate 51, with the actuating ends of the horizontal electric cylinders connected to the sliding plate 51. Of course, the sliding plate drive device 52 can also use any reciprocating motion device 131 in the prior art, such as a cylinder, ball screw, etc. The sliding plate 51 is provided with a discharge hole with the same inner diameter as the barrel 1. Before feeding, the sliding plate 51 is moved by the horizontal electric cylinders to separate the discharge transition chamber 4 from the barrel 1, thus forming an independent flat-bottomed mixing space, which is beneficial for mixing the slurry. After mixing is complete, the sliding plate 51 returns to its original position under the action of the horizontal electric cylinder (returning to the position of the discharge port and the state where the discharge transition chamber 4 is aligned with the barrel 1), so that the discharge transition chamber 4 is connected to the barrel 1, and the slurry flows into the discharge transition chamber 4 for discharge. This process is repeated to achieve continuous automatic mixing and discharge without stopping the machine.

[0047] The sliding door panel assembly 5 also includes an upper sealing plate 53 and a lower sealing plate 54. The upper sealing plate 53 and lower sealing plate 54 are respectively positioned above and below the sliding plate 51 in the vertical direction, and horizontally positioned on the side of the barrel 1 away from the sliding plate 51. The upper sealing plate 53 is sealed and connected to the lower flange of the barrel 1 at its lower edge with bolts, and the lower sealing plate 54 is sealed and connected to the lower flange of the discharge transition chamber 4 at its upper edge with bolts, so that the end of the sliding plate 51 used to separate the discharge transition chamber 4 from the barrel 1 is sealed between the upper sealing plate 53 and the lower sealing plate 54. Firstly, the sliding plate 51, the upper sealing plate 53, and the lower sealing plate 54 are all made of materials that do not react with the battery slurry. Furthermore, to ensure effective sealing and smooth sliding of the sliding plate 51 in the gap between the upper sealing plate 53 and the lower sealing plate 54 without significant metal friction, one of the sliding plate 51 and the upper and lower sealing plates is a solid self-lubricating material, and the other is a metal material. For example, when the sliding plate 51 is made of a solid self-lubricating material, the upper sealing plate 53 and the lower sealing plate 54 are made of metal; when the sliding plate 51 is made of metal, the upper sealing plate 53 and the lower sealing plate 54 are made of solid self-lubricating materials. To elaborate further, "solid self-lubricating material" here mainly refers to non-metallic materials among solid self-lubricating materials, such as polytetrafluoroethylene, polyoxymethylene, and silicon nitride. "Metallic material" here mainly refers to metallic materials that do not react with the battery slurry, such as stainless steel and aluminum. Of course, the sliding plate 51, upper sealing plate 53, and lower sealing plate 54 can all be made of solid self-lubricating materials. To ensure that the gap between the upper sealing plate 53 and the lower sealing plate 54 is uniform and free from deformation, the upper sealing plate 53 is sealed and connected to the lower flange of the barrel 1 by bolts, and the lower sealing plate 54 is sealed and connected to the upper flange of the discharge transition chamber 4 by bolts. The outer edges of the upper sealing plate 53 and the lower sealing plate 54 are connected by a door panel spacer 55 located between the upper sealing plate 53 and the lower sealing plate 54. The sliding door panel assembly 5 also includes a lifting beam 56, which is fixed on the mixing tank platform 3 used to fix the tank body 1. The upper sealing plate 53 on the side away from the ground is engaged with the lifting beam 56 by a lifting nut for fine adjustment, which offsets the gap deformation caused by the cantilever structure. This connection method, with the help of structural rigidity, further ensures the uniformity of the gap.

[0048] During actual operation, due to the high viscosity, the slurry surface forms a funnel shape when it is fed. To prevent gas from mixing with the slurry and entering the discharge transition chamber 4, the lowest slurry level must not be lower than the height of the sliding plate 51 each time it is fed. That is, some slurry will remain in the tank 1 after each feeding. Before the next stirring, the sliding plate 51 needs to be closed (forming an independent flat-bottomed stirring space). At this time, the slurry in the circular hole of the sliding plate 51 will be pushed into the gap formed by the upper sealing plate 53 and the lower sealing plate 54 for temporary storage. When the stirring is completed, the sliding plate 51 returns to its original position, and the slurry in the circular hole will be pulled back to its original position and transported away when it is fed.

[0049] When the mixing process is underway inside the tank 1, the sliding plate 51 separates the discharge transition chamber 4 from the tank 1. If the slurry in the discharge transition chamber 4 is static at this time, it will gradually become jelly-like. When mixing is complete and discharge is initiated, the self-priming force of the discharge pump 7 alone cannot smoothly discharge the slurry. To solve this problem, three independent stirring paddles 9 are designed inside the discharge transition chamber 4 to agitate the slurry. For example... Figure 5 , Figure 6 As shown, the agitator 9 is fixed to the wall of the discharge transition chamber 4 and driven by the agitator drive device 10. The agitator drive device 10 includes a servo motor, a reducer, and a bearing housing disposed on the outer wall of the discharge transition chamber 4. The drive shaft 152 passes through the wall of the discharge transition chamber 4, and an axial sealing design is provided between the drive shaft 152 and the wall of the discharge transition chamber 4 to prevent slurry leakage. When discharging, the agitator 9 stirs, which can agitate and flow the slurry in the discharge transition chamber 4, increasing its fluidity and making it easier to discharge. Of course, the number of agitators 9 can also be adjusted according to actual needs.

[0050] During the feeding process of high-viscosity slurry, it was found that the slurry adhered to the walls very seriously, and the liquid surface was funnel-shaped. To solve the problem of wall adhesion, this invention designs an automatically lifting scraper ring 11 inside the tank 1. When feeding, as the slurry liquid level drops, the scraper ring 11 also drops, scraping off the slurry adhering to the walls, achieving a self-cleaning effect on the inner wall of the tank 1, and making the slurry feeding in the tank 1 more thorough. Specifically, the stirring head 6 is mounted on the upper support 2 via the stirring head frame 12. The driving device of the stirring head 6 and the feeding structure of the mixing tank are also mounted on the stirring head frame 12. The stirring head frame 12 has a lower flange 121, perpendicular to the axial direction of the stirring head frame 12, for sealing and docking with the tank 1. A scraper ring 11, adapted to the inner wall of the barrel 1, is provided at the end of the barrel 1 furthest from the ground. Here, "adapted" means that the scraper ring 11 is a horizontally annular structure. The outer diameter of the scraper ring 11 is equal to or slightly smaller than the inner diameter of the barrel 1. The scraper ring 11 is slidably disposed in the barrel 1 along the height direction and is driven by a scraper ring drive device 13. The scraper ring drive device 13 includes a stroke device 131 for moving the scraper ring 11 along the height direction. In this embodiment, the stroke device 131 is a vertical electric cylinder. The stroke device 131 can also be any structure capable of reciprocating motion in the prior art, such as a cylinder, ball screw, etc. A vertical electric cylinder is fixed to the upper support 2 via an electric cylinder mounting plate 132. The actuating end of the vertical electric cylinder is connected to a slider, which is connected to a slider mounting plate 133. The upper ends of several vertically oriented sliding optical shafts 134 are fixed to the slider mounting plate 133, and the lower ends of the sliding optical shafts 134 are connected to a scraper ring 11. The sliding optical shafts 134 slidably seal through the lower flange 121 of the mixing head frame. A sliding sleeve made of non-metallic self-lubricating material is installed on the lower flange of the mixing head frame to prevent the sliding optical shafts 134 from generating metal dust during sliding. The vertical electric cylinder controls the automatic raising and lowering of the scraper ring 11 by driving the slider mounting plate 133 via the slider. During mixing, the scraper ring 11 is at its highest position. After mixing is completed and the material is discharged, the scraper ring 11 descends as the liquid level decreases, scraping away the viscous slurry adhering to the wall.

[0051] This embodiment also includes a control system for controlling the actions of the lifting device, sliding plate drive device 52, stirring paddle drive device 10, discharge pump 7, and other moving parts. A liquid level sensor is installed on the stirring head frame 12, and a temperature sensor is installed on the tank body 1. The liquid level sensor and temperature sensor feed signals back to the control system, which then controls the actions of the moving parts. Since the control system is prior art, it will not be described in detail here.

[0052] By utilizing the fact that high-viscosity slurry is a non-Newtonian fluid with shear-thinning properties, and that heating further improves its fluidity, this embodiment achieves the effect of smooth discharge and avoidance of wall adhesion. The operating steps of this embodiment are as follows:

[0053] 1) Inject a constant temperature medium into the inner wall of barrel 1 to maintain the ambient temperature of barrel 1;

[0054] 2) The initial state of the sliding plate 51 is closed, and the discharge transition chamber 4 is isolated from the barrel 1;

[0055] 3) The lifting device pushes the mixing tank platform 3 up, so that the tank body 1 and the lower flange 121 of the mixing head frame are compacted and sealed;

[0056] 4) Begin adding raw materials into container 1 and stir until stirring is complete;

[0057] 5) After mixing is completed, the sliding plate 51 is opened, so that the discharge transition chamber 4 is connected to the barrel 1, and the slurry flows downward and fills the discharge transition chamber 4.

[0058] 6) As the liquid level drops, the scraper ring 11 presses down and scrapes the material;

[0059] 7) Turn on the agitator 9 inside the discharge transition chamber 4;

[0060] 8) Start the discharge pump 7 to discharge material. At the same time, the scraper ring 11 presses down and scrapes the material.

[0061] 9) When the lowest point of the liquid level is 2-5 cm higher than the sliding plate, close the sliding plate 51;

[0062] 10) Repeat steps 4 to 9 to achieve continuous stirring until all materials are stirred.

[0063] Example 2: A high-viscosity slurry mixing tank

[0064] This embodiment is a high-viscosity slurry mixing tank. The structure of this embodiment is basically the same as that of Embodiment 1. However, since the stirring range of the stirring paddle 9 is limited to the discharge transition chamber 4, the slurry in the discharge port (i.e., the outlet of the funnel-shaped structure) is not stirred. When the suction force of the discharge pump 7 is low and the slurry viscosity is high, the discharge pump 7 alone cannot smoothly draw the slurry out of the discharge port. Therefore, the difference between this embodiment and Embodiment 1 is that this embodiment also provides a stirring shaft 14 along the direction of the discharge pipe 8 at the outlet of the funnel structure of the discharge transition chamber 4. The stirring shaft 14 is driven by a stirring shaft drive device 15, and a rotating guide head 16 with a propeller-type screw blade structure is fixed to one end of the stirring shaft 14 facing the discharge pipe 8.

[0065] Specifically, such as Figure 7 , Figure 8As shown, the stirring shaft 14 is located at the center of the discharge transition chamber 4, which corresponds to the center of the discharge pipe 8. The stirring shaft drive device 15 includes a reducer servo motor 151 fixed to the wall of the discharge transition chamber 4. Power is provided by the reducer servo motor 151. The reducer servo motor 151 is connected to the outer wall of the tank 1 through a fixed bearing seat, and a horizontally oriented drive shaft 152 is connected to the center of the fixed bearing seat. The drive shaft 152 passes through the tank 1 and has an axial sealing structure at the penetration point to prevent slurry leakage. One end of the drive shaft 152 located inside the tank 1 is connected to a sealing diverter 153. Through the sealing diverter 153, power is transmitted from the horizontal drive shaft 152 to the vertical stirring shaft 14. The sealing diverter 153 includes a helical gear diverting mechanism. The diverting mechanism is covered by a sealing shell to prevent slurry from entering the diverter. Since the diverting mechanism and sealing technology are relatively mature in the prior art, they will not be described in detail here. To enhance the stability of the stirring shaft 14, a support frame 154 is arranged radially around the circumference of the tank body 1 on the inner wall of the discharge transition chamber 4. The sealing deflector 153 is fixed to the support frame 154, which is mounted on a support frame mounting boss 155 fixed to the inner wall of the discharge transition chamber 4. A bearing is installed between the axis of the support frame 154 and the stirring shaft 14, making the support frame 154 act as a fixed bearing seat for the stirring shaft 14. A bearing sealing cover is installed below the support frame 154, with a radial seal between the support frame 154 and the mounting surface, and an axial seal between the support frame 154 and the stirring shaft 14, preventing slurry from entering the internal transmission space. The entire transmission structure is sealed to prevent slurry leakage and seepage, ensuring the stability of the transmission and the cleanliness of the slurry.

[0066] A rotary guide head 16 is fixedly installed at one end of the stirring shaft 14 facing the discharge pipe 8. The rotary guide head 16 is a pusher screw blade structure with dimensions adapted to the discharge port. Power is output through the reducer servo motor 151 and transmitted to the stirring shaft 14 through the transmission shaft 152 and the sealed deflector 153, which ultimately causes the rotary guide head 16 to rotate, thereby agitating the slurry in the discharge pipe area. Since the rotary guide head 16 is a pusher screw blade structure, it can also perform the function of feeding while agitating.

[0067] The usage steps of this embodiment are the same as those in Embodiment 1. The difference is that in step 7, when the stirring paddle 9 in the discharge transition chamber 4 is opened, the stirring shaft 14 is opened at the same time.

[0068] Example 3: A high-viscosity slurry mixing tank

[0069] This embodiment is a high-viscosity slurry mixing tank, which is basically the same as the structure of embodiment 2, except for the structure of the mixing paddle 9.

[0070] like Figure 9 , Figure 10As shown, the stirring paddle 9 in this embodiment is a non-circular stirring paddle 9 adapted to the longitudinal cross-sectional shape of the inner wall of the discharge transition chamber 4. The non-circular stirring paddle 9 is designed according to the shape and function of the discharge transition chamber 4, as shown in the figure, but not limited to this structure. The stirring paddle 9 has a planar structure, and the outer edge of the stirring paddle 9 has the same longitudinal cross-sectional shape as the inner wall of the discharge transition chamber 4. The stirring paddle 9 is provided with non-circular holes for the slurry to pass through during stirring. The symmetrical axis of the stirring paddle 9 is sleeved on the stirring shaft 14, and the stirring paddle 9 and the rotating guide head 16 are driven to rotate together by the stirring shaft drive device 15. Compared with embodiment 2, this embodiment is more economical while satisfying the stirring effect.

[0071] Example 4: A high-viscosity slurry mixing tank

[0072] This embodiment is a high-viscosity slurry mixing tank, which has a structure that is basically the same as that of Embodiment 1. The difference is the setting of the scraper ring drive device 13. In Embodiment 1, the stroke device 131 and the sliding optical shaft 134 are both set outside the mixing head frame 12. In this embodiment, the stroke device 131 and the sliding optical shaft 134 are both set inside the mixing head frame 12.

[0073] Specifically, such as Figure 11 As shown, the stirring head frame 12 is a hollow cylindrical structure adapted to the outer diameter of the barrel 1 and is fixed on the upper support 2. The stroke device 131 and the sliding optical shaft 134 are both set in the hollow structure inside the stirring head frame 12. The stirring head frame 12 includes a side wall and a bottom wall. The sliding optical shaft 134 extends through the bottom wall into the barrel 1. The scraping ring 11 is fixedly connected to the screw nut of the ball screw and is guided by the sliding optical shaft 134 and the linear bearing. In this embodiment, the stroke device 131 includes a ball screw fixed to the inner side wall. The ball screw is driven by a reducer servo motor. The scraping ring 11 is fixed to the screw nut. The reciprocating motion of the screw nut along the height direction drives the scraping ring 11 to move in the height direction to realize the scraping function. Of course, the stroke device 131 can also be any structure in the prior art that can realize reciprocating motion, such as a cylinder, electric cylinder, etc. In this embodiment, the drive structure of the scraper ring 11 is set inside the mixing head frame 12, which makes the equipment more integrated, easier to transport, has a simple and dustproof appearance, and makes the feeding process safer.

[0074] It should be noted that the above embodiments describe different implementations of the stirring paddle 9, different implementations of the scraper ring 11 drive structure, and different cases of whether or not a stirring shaft 14 is provided. The embodiments of the present invention are not limited to the above embodiments, and different implementations can be freely combined as needed. For example, the present invention can be implemented by combining the internal drive structure of the scraper ring 11 with a non-shaped stirring paddle 9, or by combining the internal drive structure of the scraper ring 11 with a stirring shaft 14, and so on.

Claims

1. A high-viscosity slurry mixing tank, comprising a tank body mounted on a frame, wherein a stirring head is disposed within the tank body, characterized in that: The end of the barrel near the ground is connected to a discharge transition chamber that is adapted to the diameter of the barrel. A sliding door panel assembly is provided at the connection between the discharge transition chamber and the barrel. By opening or closing the sliding door panel assembly, the discharge transition chamber can be connected or separated from the barrel. The end of the discharge transition chamber near the ground is connected to a discharge pipeline with a discharge pump. The discharge transition chamber is funnel-shaped, and the discharge pipeline is connected to the small diameter end of the discharge transition chamber. The discharge transition chamber is equipped with a stirring paddle for stirring the slurry inside. The sliding door panel assembly includes a sliding plate that is slidably disposed between the discharge transition chamber and the barrel body along the connection line between the discharge transition chamber and the barrel body. The sliding plate is connected to a sliding plate drive device, and the sliding plate is provided with a discharge hole position equal to the inner diameter of the barrel body. The sliding door panel assembly also includes an upper sealing plate and a lower sealing plate, and the sliding plate is sealed between the upper sealing plate and the lower sealing plate. The stirring head is located at the end of the barrel that is away from the ground. The barrel is cylindrical. A scraping ring that is adapted to the inner wall of the barrel is located at the end of the barrel that is away from the ground. The scraping ring is slidably installed in the barrel along the height direction and is driven by a scraping ring drive device. A stirring head frame is installed at the end of the barrel furthest from the ground. Both the stirring head and the scraper ring drive device are mounted on the stirring head frame. The scraper ring drive device includes a stroke device for moving the scraper ring along the height direction. The actuating end of the stroke device is connected to the scraper ring via a vertically oriented sliding optical shaft, which slidably and sealingly passes through the stirring head frame. The sliding optical shaft can be positioned in any of the following ways. a. The stirring head frame has a hollow structure, and the stroke device and sliding optical shaft are both located inside the stirring head frame; b. Both the stroke device and the sliding optical shaft are located outside the mixing head frame. The mixing head frame has an integral lower flange perpendicular to the axis of the mixing head frame at the end near the ground, and the sliding optical shaft passes through the lower flange.

2. The high-viscosity slurry mixing tank according to claim 1, characterized in that: The agitator is fixed to the wall of the discharge transition chamber and is driven by an agitator drive device.

3. The high-viscosity slurry mixing tank according to claim 1, characterized in that: The discharge transition chamber is also equipped with a stirring shaft along the discharge pipeline. The stirring shaft is driven by a stirring shaft drive device, and a rotating guide head is fixed at the end of the stirring shaft facing the discharge pipeline.

4. A high-viscosity slurry mixing tank according to any one of claims 1 to 3, characterized in that: The sliding plate, upper sealing plate, and lower sealing plate are made of any of the following materials. a. The sliding plate, upper sealing plate, and lower sealing plate are all made of solid self-lubricating material; b. The sliding plate is made of solid self-lubricating material, and the upper and lower sealing plates are made of metal. c. The sliding plate is made of metal, and the upper and lower sealing plates are made of solid self-lubricating material.

5. A high-viscosity slurry mixing tank according to claim 4, characterized in that: The upper sealing plate is fixed to the lifting beam on the side away from the ground, and the lifting beam is fixed to the corresponding frame used to fix the barrel.

6. A high-viscosity slurry mixing tank according to any one of claims 1 to 3 and 5, characterized in that: The frame includes a separate upper support and a mixing tank platform. The mixing head frame is set on the upper support, and the tank body, discharge transition chamber, and sliding door panel assembly are set on the mixing tank platform. The upper edge of the tank body is lower than the lower edge of the mixing head. The mixing tank platform is detachably set on the lifting device. The tank body is lifted by the lifting device to connect with the mixing head frame.

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