Agitation device

Abstract

To provide a kneading device for a high speed homogenization system having high kneading capability in a battery field.SOLUTION: An agitation device has an agitation disk 100 including an agitation paddle 110, a conical column 130, and an agitation guard 140. The agitation guard 140 has an annular shape. The agitation paddle 110 is composed of a plurality of blades 114. The blades 114 are fixedly connected to the side wall of the agitation guard 140, and are equally arranged at an equal circumferential angle around a center point of the agitation guard 140. The bottom of the conical column 130 is connected to the agitation paddle 110 by a screw. The central axis of the conical column 130 coincides with the central axis of the agitation guard 140, and includes a plurality of agitation bars 120. The blade 114 is fixedly connected to the agitation bars 120. A plurality of jet holes 141 are also provided on the side wall of the agitation guard 140.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technical field of battery manufacturing equipment, and in particular to a stirring device. [Background technology]

[0002] With the development of the electric age, the battery industry has become more optimistic. Currently, the type of battery that is widely used is one in which electrolyte slurry is coated on one side of hand-cut steel. This type of battery has very high requirements for the viscosity of the electrolyte slurry.

[0003] High-speed homogenization systems in the battery industry have always been at the core of adjusting the viscosity of electrolyte paste. While the stirring paddles of existing high-speed homogenization systems have strong dispersion capabilities, they still lack sufficient mixing capabilities. The core reason for this problem is that the dispersion tower discharges the slurry at high speed, limiting the amount of slurry discharged into the extrusion mixing area and preventing sufficient shear speed. Therefore, it is necessary to propose a new mixing device to replace the existing high-speed homogenization systems, which have weak mixing capabilities. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Chinese Utility Model No. 219518669 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, it is necessary to propose a kneading device in contrast to the conventional high-speed homogenization system, which has a weak kneading capacity. [Means for solving the problem]

[0006] The present application provides a stirring device comprising: Includes a stirring disc, The stirring disc includes a stirring paddle, a conical post, and a stirring guard; The stirring guard is annular, and a plurality of injection holes are provided in a side wall of the stirring guard. the agitator paddle includes a plurality of blades, each blade fixedly connected to a side wall of the agitator guard, each blade evenly spaced at an equal circumferential angle about a center point of the agitator guard; The bottom of the conical column is connected to the stirring paddle by a screw, the central axis of the conical column coincides with the central axis of the stirring guard, and the angle between the generatrix of the conical column and the central axis is 15 degrees or more and 40 degrees or less; the stirring disc includes a plurality of stirring bars, each blade fixedly connected to a stirring bar; a slurry container having a receiving cavity, the agitating disc being disposed within the receiving cavity of the slurry container; a screw pump fixedly connected to the slurry container and in fluid communication with the receiving cavity of the slurry container; a bracket including a main body, a connecting shaft, and a drive device, wherein the slurry container is fixedly connected to the main body, a predetermined portion of the connecting shaft is received in a receiving cavity of the slurry container, a predetermined portion of the connecting shaft is fixedly connected to the stirring disc, and the connecting shaft is hingedly connected to the drive device; The stirring device further comprises:

[0007] A predetermined gap is provided between the lower end of the stirring disc and the lower surface of the slurry container, and the predetermined gap is 15 mm or more and 25 mm or less.

[0008] The ratio of the diameter of the slurry container to the diameter of the stirring guard is 0.3 or more and 0.6 or less. [Effects of the Invention]

[0009] This application relates to a mixing device. A semi-finished slurry is placed in a slurry container, and a mixing disc uses a mixing paddle to initially divide the semi-finished slurry. The initially divided semi-finished slurry is then separated into two parts by the centrifugal force and thrust of the mixing paddle. A portion of the semi-finished slurry is further dispersed through the injection holes in the mixing guard by centrifugal force, and a large amount of the semi-finished slurry is dispersed by the injection holes at the beginning of the mixing process. The dispersed slurry then flows back into the fluid field and is diverted to the mixing paddle by the conical column. At this point, the mixing bar pre-mixes the dispersed slurry, allowing the mixing paddle to re-disperse the pre-mixed slurry. It is noteworthy that the viscosity of the dispersed slurry at this point can be coupled and subjected to a thrust force. The remaining part of the semi-finished slurry contacts the bottom of the slurry container with the thrust force and is mixed by the entire fluid force field and thrust according to the design structure and designed rotation speed of the mixing disc. When a slurry with the correct viscosity appears, initial accumulation of slurry lumps occurs, and the screw pump can discharge the initial accumulation of slurry lumps while simultaneously emptying the space between the bottom of the agitator guard and the slurry container. This solves the problem of the weak mixing ability of conventional high-speed homogenizing systems. [Brief explanation of the drawings]

[0010] [Figure 1] 1 shows a schematic structure of a stirring device provided in one embodiment of the present invention. [Figure 2] 1 is a graph showing the results of finite element analysis of the stirring disk during stirring of a slurry in the stirring device provided in one embodiment of the present invention. [Figure 3] FIG. 2 is an enlarged view of part A provided by one embodiment of the present invention. [Figure 4] 1 shows a schematic structure of an agitation disc having parallelogram injection holes and a booster plate in an agitation device provided in one embodiment of the present invention. [Figure 5] 10 shows a schematic structure of a stirring guard in a stirring device provided in another embodiment of the present application. [Figure 6]1 shows a schematic structure of a blade back portion and a blade cutting edge portion of an agitation disk in an agitation device provided in one embodiment of the present invention. [Figure 7] 1 shows a schematic structure of a screw pump in a stirring device provided in one embodiment of the present invention. [Figure 8] FIG. 1 is a diagram showing a state in which a mixing device filled with a slurry is used, according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] In order to make the objectives, technical solutions and advantages of the present invention clearer and easier to understand, the present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described in this specification are only for the purpose of illustrating the present invention and are not intended to limit the present invention.

[0012] The present invention provides a stirring device.

[0013] As shown in FIG. 1, the agitation device according to one embodiment of the present invention includes an agitation disk 100, a slurry container 200, a screw pump 300, and a bracket 400.

[0014] The stirring disc 100 includes a stirring paddle 110, a conical column 130, and a stirring guard 140. The stirring guard 140 is annular, and the stirring paddle 110 includes a plurality of blades 114. Each blade 114 is fixedly connected to the side wall of the stirring guard 140 and is evenly spaced at equal circumferential angles around the center point of the stirring guard. The bottom of the conical column 130 is threadedly connected to the stirring paddle 110, and the central axis of the conical column 130 coincides with the central axis of the stirring guard 140. The stirring disc 100 also includes a plurality of stirring bars 120. Each blade 114 is fixedly connected to the stirring bar 120. A plurality of injection holes 141 are also provided on the side wall of the stirring guard 140.

[0015] Specifically, the stirring paddle 110, the stirring bar 120, and the stirring guard 140 are fixedly connected to improve the kneading action of the dispersed slurry. Here, the stirring bar 120 enables preliminary kneading, and the injection holes 141 of the stirring guard 140 enable further kneading. It is worth noting that the stirring paddle 110 mainly shears, presses, and disperses the slurry during the entire stirring process.

[0016] More specifically, the conical post 130 has two lifting notches for replacing the stirring paddle 110 and is generally taller than the stirring bar 120 .

[0017] The slurry container 200 has a receiving cavity, and the stirring disc 100 is disposed in the receiving cavity of the slurry container 200 with a predetermined gap between the bottom end of the stirring disc 100 and the bottom surface of the slurry container 200.

[0018] 3, the predetermined interval is a slurry kneading area. The predetermined interval is within a range of 0.5 to 0.7 times the height of the agitation guard 140, and the diameter of the agitation guard 140 is within a range of 0.3 to 0.6 times the diameter of the slurry container 200.

[0019] The predetermined interval has a height of 20 mm in the direction of extension of the vertical line.

[0020] The screw pump 300 is fixedly connected to the slurry container 200 and communicates with the receiving cavity of the slurry container 200 .

[0021] The bracket 400 includes a main body 410, a connecting shaft 420, and a driving device 430. The slurry container 200 is fixedly connected to the main body 410, a predetermined portion of the connecting shaft 420 is received in an accommodating cavity (internal hollow) of the slurry container 200, a predetermined portion of the connecting shaft 420 is fixedly connected to the stirring disc 100, and the connecting shaft 420 is hingedly connected to the driving device 430.

[0022] Specifically, as shown in FIG. 2, the semi-finished slurry is contained in the slurry container 200, and the stirring disc 100 initially divides the semi-finished slurry into two parts using the stirring paddle 110. The centrifugal force and thrust of the stirring paddle 110 separate the semi-finished slurry into two parts. Some of the semi-finished slurry is further dispersed by centrifugal force through the injection holes 141 of the stirring guard 140, and a large amount of the semi-finished slurry is dispersed by the injection holes at the beginning of the stirring process. The dispersed slurry then flows back in the fluid field and is diverted to the stirring paddle 110 by the conical column 130. At this point, the stirring bar 120 pre-mixes the dispersed slurry, allowing the stirring paddle 110 to re-disperse the pre-mixed slurry. It is noteworthy that the viscosity of the dispersed slurry at this point can be coupled and subjected to a thrust force. The remaining part of the semi-finished slurry product comes into contact with the bottom of the slurry container 200 through thrust, and is kneaded by the entire fluid force field and thrust according to the design structure and designed rotation speed of the stirring disc 100. When a slurry with a sufficient viscosity appears, initial slurry lump accumulation occurs, and the screw pump 330 can discharge the initial slurry lump accumulation while simultaneously emptying the space between the bottom of the stirring guard 140 and the slurry container 200. This solves the drawback of conventional high-speed homogenizing systems, namely, their weak kneading ability.

[0023] This embodiment relates to a mixing device. The mixing paddle 110 has high dispersion ability, and the mixing paddle 110 and mixing guard 140 work together to achieve mixing capabilities that meet the design requirements of the finished slurry. The mixing bar 120 extrudes the slurry at high speed, ensuring a sufficient amount of slurry is discharged into the extrusion mixing area. The injection holes 141 on the mixing guard 140 have a high shear rate that is suitable for the amount of slurry being discharged.

[0024] In particular, adding a circular stirring guard 140 to the top of the stirring paddle 110 reduces the amount of slurry ejected from the stirring bar 120, and the stirring guard 140 forces the slurry to be discharged into the extrusion-kneading area at the bottom of the vessel, thereby improving the kneading effect. Furthermore, the uniform arrangement of numerous injection holes 141 on the stirring guard 140 prevents the occurrence of flow disruption zones, which can affect the fluidity of the entire slurry and cause sedimentation. Looking at the fluid simulation diagram in Figure 2, we can see that most of the fluid flows through the extrusion-kneading area at the bottom of the vessel.

[0025] The stirring disc 100 is characterized by a strong kneading effect and promotes rapid fusion of powder and liquid, thereby shortening the stirring time of the entire slurry and improving production efficiency.

[0026] As shown in Fig. 4, in one embodiment of the present application, the shape of the injection hole 141 is a parallelogram. The stirring guard 140 is provided with a row of injection holes 141, and the row of injection holes 141 is provided near the center of the side wall of the stirring guard 140. In the row of injection holes 141, all of the injection holes 141 are evenly arranged at equal central angles around the central axis of the stirring guard 140, and all of the injection holes 141 are on the same plane. The included angle between the side of the injection hole along the vertical direction and the side of the injection hole along the horizontal direction is a predetermined angle. The predetermined angle is less than 90 degrees.

[0027] Specifically, as shown in FIG. 5, the rotation direction of the stirring paddle 110 may be either clockwise or counterclockwise.

[0028] As an example, let us assume that the rotation direction of the stirring paddle 110 is clockwise when viewed from the same viewing angle: As shown in FIG. 5, the X-axis direction is the horizontal direction, and the Y-axis direction is the vertical direction.

[0029] Table 1: Table of kneading performance parameters of agitator discs 100 with different shapes of injection holes 141. It is noteworthy that the difference between agitator discs 100 with parallelogram-shaped injection holes 141 and agitator discs 100 with circular injection holes 141 is the difference in the structure of the agitator guard 140 and injection holes 141; other structures, such as the paddle body size, oblique mouth size, cone size, and rod-shaped pin size, are kept exactly the same.

[0030] [Table 1]

[0031] This embodiment relates to the injection holes 141. The thickness of the stirring guard 140 is 8 mm, and the total height of the stirring guard 140 is 70 mm. The injection holes 141 are 7 mm away from the upper edge of the stirring guard 140 and 35 mm away from the lower edge of the stirring guard 140, and there are a total of 96 holes, each 6 mm long and 38 mm high. The injection holes 141 speed up the circulation of the slurry. This is because the flow path area of ​​the quadrangular injection hole stirring guard 140 is all increased, albeit to different degrees, compared to the circular injection hole stirring guard 140.

[0032] 4 and 6, in one embodiment of the present application, each blade 114 has the same structure. The blade 114 includes a blade back portion 111 and a blade cutting edge portion 112. The blade back portion 111 is fixedly connected to the blade cutting edge portion 112. The blade cutting edge portion 112 is provided along a tangential direction of the rotation direction of the stirring disc 100, and the blade back portion 111 is provided away from the tangential direction of the rotation direction of the stirring disc 100.

[0033] Specifically, "the space in which the rotation direction of the agitating paddles 110 faces is the gap between two adjacent agitating paddles 110" means that the agitating paddles 110 divide a spatial plane into one empty space and one sector-shaped area intersecting with the agitating paddles 110. The direction of the agitating paddle 110 from its initial position toward the empty space is the rotation direction of the agitating paddle 110. As shown in FIG. 1, the agitating paddle 110 includes a blade back portion 111 and a blade cutting edge portion 112. Under normal operating conditions, the blade back portion 111, the blade cutting edge portion 112, and the empty space are sequentially arranged along the rotation direction of the agitating paddle 110, forming a structural arrangement cycle.

[0034] A booster plate 113 is provided on the upper surface of each of the blade backs 111. Each of the booster plates 113 is disposed between the conical column 130 and the stirring bar 120. The booster plates 113 have the same structure. The booster plates 113 are perpendicular to the blade backs 111, and the height of the booster plates 113 is lower than the height of the stirring guard 140.

[0035] Specifically, the booster plate 113 can enhance the interaction between the force fields of the slurry fluid and enhance the kneading action of the entire stirring disc 100 .

[0036] The central axes of the stirring bars 120 are perpendicular to the horizontal plane. Each of the stirring bars 120 is fixedly connected to the blade back portion 111. All of the stirring bars 120 are installed near the upper surface of the blade back portion 111. Each of the stirring bars 120 is evenly arranged at equal central angles around the central axis of the stirring guard 140. The height of the stirring bars 120 is greater than the height of the stirring guard.

[0037] Specifically, the stirring bar 120 can strengthen the interaction between the force fields of the slurry fluid and enhance the kneading action of the entire stirring disc 100 .

[0038] This embodiment relates to the stirring paddle 110, which has high dispersion ability, and the kneading ability achieved by the stirring paddle 110 and the stirring guard 140 together meets the design requirements of the finished slurry. The stirring bar 120 ejects the slurry at a high speed, discharging a sufficient amount of slurry into the extrusion kneading area, and the injection holes 141 of the stirring guard 140 meet the discharge amount of the slurry at a high shear rate.

[0039] In particular, a circular stirring guard 140 is added to the top of the stirring paddle 110 to reduce the amount of slurry discharged from the stirring bar 120. The stirring guard 140 can force the slurry to be discharged into the extrusion kneading area at the bottom of the container, thereby improving the kneading effect.

[0040] As shown in FIG. 4, in one embodiment of the present application, the included angle between the generatrix and the central axis of the conical pillar is greater than or equal to 15 degrees and less than or equal to 40 degrees.

[0041] Specifically, the conical column 130 is fixedly connected to the stirring paddle 110. According to the requirements of various working conditions, the included angle between the generatrix and the central axis of the conical column 130 is between 15 degrees and 40 degrees.

[0042] The slurry flows along the conical column 130 onto the blade surface of the stirring paddle 110 to achieve better dispersion.

[0043] As shown in FIG. 7 , in one embodiment of the present application, a screw pump 300 includes a first screw portion 310, a second screw portion 320, and a slurry discharge shell 330. The slurry discharge shell 330 is sleeve-connected to the outside of the first screw portion and the second screw portion. The first screw portion 310 and the second screw portion 320 have the same structure. The first screw portion 310 includes a motor 311 and a screw 312. The motor 311 is fixedly connected to the slurry discharge shell 330. The power shaft of the motor 311 is fixedly connected to the screw 312. The central axis of the motor 311 coincides with the central axis of the screw 312, and the screw 312 of the first screw portion 310 meshes with the screw 312 of the second screw portion 320. A first end of the slurry discharge shell 330 is connected to the slurry container 200, and a second end of the slurry discharge shell 330 is externally connected to a finished product storage device.

[0044] Specifically, in order to improve the mixing performance of the slurry, the screw pump 300 of this embodiment employs a first screw portion 310 and a second screw portion 320 with the same structure. During the process of drawing out the finished slurry, the first screw portion 310 and the second screw portion 320 further mix the slurry, and the slurry passes through the screw threads into the slurry discharge shell 330 to discharge the slurry.

[0045] In particular, the finished product storage device is not depicted in FIG. 7, and is used to store the slurry after kneading.

[0046] This embodiment relates to a screw pump 300, which achieves a mixing capacity that meets the design requirements of the finished slurry.

[0047] As shown in FIG. 8, in one embodiment of the present application, the slurry container 200 further includes a wall agitating paddle 210, which is attached to the inner wall of the slurry container 200.

[0048] A cooling jacket 220 is provided on the outer circumferential surface of the slurry container 200 .

[0049] This embodiment relates to a slurry container 200, and the wall agitation paddle 210 can lift the slurry on the inner wall of the slurry container 200 away from the inner wall of the slurry container 200, thereby increasing the utilization rate of the slurry. The cooling jacket 220 cools the slurry to prevent it from overheating.

[0050] The first end in Figures 7 and 8 is the first end 331 of the slurry discharge shell, and the second end is the second end 332 of the slurry discharge shell.

[0051] The various technical features of the above-described embodiments may be combined in any manner, and the order of the method steps is not limited. For the sake of brevity, not all possible combinations of the various technical features of the above-described embodiments are described. However, unless there is a contradiction in the combination of these technical features, all combinations should be considered within the scope of the description of this specification. The above-described embodiments merely represent some embodiments of the present invention described in more specific and detailed terms, and should not be construed as limiting the patent scope of the present invention. It should be noted that those skilled in the art can make many modifications and improvements without departing from the concept of the present application, all of which are within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be governed by the appended claims. [Explanation of symbols]

[0052] 100 stirring discs 110 Stirring paddle 111 Blade back 112 Blade cutting edge 113 Booster Plate 114 Blade 120 stirring bar 130 Conical column 140 Stirring guard 141 Injection hole 200 Slurry container 210 Wall stirring paddle 220 Cooling Coat 300 screw pump 310 First screw part 311 Motor 312 Screw 320 Second screw part 330 Slurry discharge shell 331 First end 332 Second end 400 bracket 410 Main Unit 420 Connecting shaft 430 Drive Unit

Claims

1. Includes a stirring disc, The stirring disc includes a stirring paddle, a conical post, and a stirring guard; the stirring guard is annular, and a plurality of injection holes are provided in the side wall of the stirring guard, and the shape of the injection holes is a parallelogram; a row of injection holes is provided near the center of the side wall of the stirring guard; in this row of injection holes, all of the injection holes are located on the same plane and are evenly arranged at equal central angles around the central axis of the stirring guard; and the angle formed by the side of the injection hole along the vertical direction and the side of the injection hole along the horizontal direction is a predetermined angle less than 90°; the agitator paddle includes a plurality of blades, each blade fixedly connected to a side wall of the agitator guard, each blade evenly spaced at an equal circumferential angle about a center point of the agitator guard; The bottom of the conical column is connected to the stirring paddle by a screw, the central axis of the conical column coincides with the central axis of the stirring guard, and the angle between the generatrix of the conical column and the central axis is 15 degrees or more and 40 degrees or less; The stirring device, wherein the stirring disc includes a plurality of stirring bars, and each blade is fixedly connected to a stirring bar.

2. a slurry container having a receiving cavity, the agitating disc being disposed within the receiving cavity of the slurry container; a screw pump fixedly connected to the slurry container and in fluid communication with the receiving cavity of the slurry container; a bracket including a main body, a connecting shaft, and a drive device, wherein the slurry container is fixedly connected to the main body, a predetermined portion of the connecting shaft is received in a receiving cavity of the slurry container, a predetermined portion of the connecting shaft is fixedly connected to the stirring disc, and the connecting shaft is hingedly connected to the drive device; The stirring device according to claim 1 , further comprising:

3. 3. The agitation device according to claim 2, wherein a predetermined distance is provided between the lower end of the agitation disc and the lower surface of the slurry container, the predetermined distance being 15 mm or more and 25 mm or less.

4. 4. The agitation device according to claim 3, wherein the ratio of the diameter of the agitation guard to the diameter of the slurry container is 0.3 or more and 0.6 or less.

5. The blades have the same structure, the blade includes a blade back portion and a blade cutting edge portion; The blade back portion is fixedly connected to the blade cutting edge portion, The blade edge is provided along a tangential direction of the rotation direction of the stirring disc, 5. The stirring device according to claim 4, wherein the back of the blade is provided away from a tangential direction of the rotation direction of the stirring disc.

6. The central axis of the stirring bar is perpendicular to the horizontal plane; each of the stirring bars is fixedly connected to one of the blade spines; The stirring bars are all installed near the top surface of the back of the blade, each of the stirring bars is evenly spaced at equal central angles around the central axis of the stirring guard; 6. The stirring device according to claim 5, wherein the height of the stirring bar is greater than the height of the stirring guard.

7. Each blade includes a booster plate provided on an upper surface of the blade back portion; Each booster plate is disposed between the conical post and the stirring bar; The structure of each booster plate is the same, the booster plate is perpendicular to the blade spine; 7. The stirring device according to claim 6, wherein the height of the booster plate is lower than the height of the stirring guard.

8. the screw pump includes a first screw portion, a second screw portion, and a slurry discharge shell; a slurry discharge shell is sleeve-coupled to the outside of the first threaded portion and the second threaded portion; the first threaded portion and the second threaded portion have the same structure; the first threaded portion includes a motor and a screw; the motor is fixedly coupled to the slurry discharge shell; The power shaft of the motor is fixedly connected to the screw; The central axis of the motor coincides with the central axis of the screw, the screw of the first threaded portion engages with the screw of the second threaded portion; a first end of the slurry discharge shell connected to the slurry container; 8. The mixing device of claim 7, wherein the second end of the slurry discharge shell is externally connected to a finished product storage device.

9. The slurry container also includes a wall agitator paddle; 9. The agitation device according to claim 8, wherein the wall agitation paddle is attached to the inner wall of the slurry container.

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