Slurry stirring paddle and stirring device

Abstract

The utility model discloses a slurry stirring paddle and a stirring device.The slurry stirring paddle comprises a transmission rod extending in the axial direction, stirring blades installed on the transmission rod, a transmission pipe and a transmission mechanism, and the transmission rod is sleeved with the transmission pipe; the conveying pipe further comprises a conveying opening used for conveying slurry and a discharging opening used for discharging the slurry, and the conveying opening and the discharging opening are formed in different positions of the conveying pipe in the axial direction. The transmission rod further comprises a transmission mechanism which is arranged in the circumferential direction of the transmission rod and extends in the axial direction. And the conveying mechanism is matched with the conveying pipe so as to convey the materials from the conveying opening to the discharging opening. The slurry is exchanged in the axial direction of the conveying pipe through the conveying pipe, rapid material exchange can be achieved in the axial direction, the mixing speed is greatly increased, the purpose of completing stirring faster is achieved, and the stirring efficiency is improved.

Description

Technical Field

[0001] This disclosure generally relates to the field of lithium battery slurry production technology. More specifically, this disclosure relates to a slurry mixing paddle and mixing device. Background Technology

[0002] In the production process of lithium batteries, slurry is a crucial component, typically composed of active materials, conductive agents, binders, and solvents. The preparation of slurry involves a series of processes, including mixing, dissolving, and dispersing liquid and solid materials. This process is highly sensitive to changes in temperature, viscosity, and environment, significantly impacting the properties of the slurry. The preparation of lithium battery slurry requires the use of a stirring device to ensure uniform distribution of slurry components and improve the consistency of lithium battery performance.

[0003] Existing slurry mixing devices generally include a mixing tank and an agitator installed inside the tank. Blades are mounted at the lower end of the agitator's drive rod. A motor drives the drive rod to rotate, causing the blades to rotate and thus mixing the slurry within the tank. However, existing agitators typically only include blades located at the bottom of the mixing tank. This results in long mixing times, low efficiency, and poor exchange and fusion of the slurry between the upper and lower parts of the tank, requiring a considerable amount of time to achieve proper mixing and fusion.

[0004] In view of this, there is an urgent need to provide a slurry mixing paddle and mixing device solution in order to improve the mixing efficiency of slurry. Utility Model Content

[0005] In order to at least solve one or more of the technical problems mentioned above, this disclosure proposes a slurry mixing paddle and mixing device in several aspects.

[0006] In a first aspect, this disclosure provides a slurry mixing impeller, comprising: a drive rod extending in an axial direction and a mixing blade mounted on the drive rod, and further comprising: a transmission pipe, which is also fitted outside the drive rod, and the transmission pipe further comprising a transmission port for transmitting slurry and a discharge port for discharging slurry; the transmission port and the discharge port are disposed at different positions in the axial direction of the transmission pipe; the drive rod further comprises a transmission mechanism disposed circumferentially around the drive rod and extending in the axial direction, the transmission mechanism cooperating with the transmission pipe to transmit slurry from the transmission port to the discharge port.

[0007] In some embodiments, the transmission mechanism includes helical blades fixedly mounted on a transmission rod.

[0008] In some embodiments, the surface of the stirring blade facing the slurry is inclined toward the direction of the transmission rod, so that the stirring blade can push the slurry upward toward the transmission port during the stirring process.

[0009] In some embodiments, the transmission port is an open end of the transmission pipe near the stirring blades; the discharge port is located at the end of the transmission pipe away from the stirring blades.

[0010] In a second aspect, this disclosure provides a slurry mixing apparatus, including a mixing tank and a main mixing blade, the main mixing blade being a slurry mixing blade according to the first aspect and several embodiments, the drive rod of the main mixing blade extending to a region near the bottom of the mixing tank, such that the mixing blades are located in the bottom region of the mixing tank.

[0011] In some embodiments, the main stirring paddle is fixed by a support member, which is a support plate. The discharge port is located below the support plate, and there are two discharge ports, which are arranged opposite to each other.

[0012] In some embodiments, the slurry mixing device further includes a secondary mixing blade, which is a slurry mixing blade according to any one of the claims, wherein the mixing blades of the secondary mixing blade are located away from the bottom region of the mixing tank relative to the mixing blades of the primary mixing blade.

[0013] In some embodiments, the drive rod of the main impeller and the drive rod of the auxiliary impeller are connected by a gear set.

[0014] In some embodiments, the stirring blades of the main impeller and the stirring blades of the auxiliary impeller rotate in the same direction.

[0015] In some embodiments, the discharge port of the main agitator is located above the liquid surface of the slurry in the mixing tank.

[0016] With the slurry mixing paddle provided above, this embodiment of the present disclosure, by sleeved with a transmission pipe outside the transmission rod and by using a transmission mechanism to output the slurry from the transmission port of the transmission pipe through the discharge port of the transmission pipe, can transport the well-mixed slurry in the axial direction and squeeze the unequally mixed slurry around the mixing blades in the axial direction. Therefore, the position of the slurry can be changed while mixing. Compared with the existing method of driving the flow and mixing of slurry by rotating the mixing paddle, this disclosure uses the transmission pipe to change the position of the slurry, which can achieve rapid material exchange in the axial direction of the transmission pipe, greatly improve the mixing speed, achieve the purpose of faster mixing completion, and improve the mixing efficiency.

[0017] Furthermore, in some embodiments, by tilting the agitator blades with their facing surfaces towards the drive rod, the agitator blades can push the slurry closer to the transmission port during mixing, thus forming a highly efficient slurry circulation system. The agitator blades actively push the slurry axially, and the pushed slurry is then transported through the transmission pipe to the side away from the agitator blades, and then squeezed back into the mixing area. This circulation method allows the slurry to move rapidly back and forth within the mixing tank, greatly enhancing the mixing effect. Attached Figure Description

[0018] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0019] Figure 1 An exemplary perspective view of a slurry mixing paddle according to some embodiments of this disclosure is shown;

[0020] Figure 2 An exemplary cross-sectional view of a slurry mixing paddle according to some embodiments of this disclosure is shown;

[0021] Figure 3 A schematic diagram of the transfer pipe of the slurry mixing paddle according to some embodiments of this disclosure is shown;

[0022] Figure 4 A schematic diagram of the transfer pipe of the slurry mixing paddle in another direction is shown in some embodiments of this disclosure;

[0023] Figure 5 An exemplary side view of a slurry mixing apparatus according to some embodiments of this disclosure is shown;

[0024] Figure 6 An exemplary perspective view of a slurry mixing apparatus according to some embodiments of this disclosure is shown;

[0025] Figure 7 An exemplary cross-sectional view of a slurry mixing apparatus according to some embodiments of this disclosure is shown;

[0026] Figure 8 An exemplary top view of a slurry mixing apparatus according to some embodiments of this disclosure is shown.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-Main agitator; 11-Support component; 110-Drive rod hole; 112-Secondary drive rod hole; 12-Drive rod; 13-Agitator blade; 131-Slurry-facing surface; 14-Transfer pipe; 140-Vertical channel; 15-Transfer port; 16-Discharge port; 17-Transfer mechanism; 2-Secondary agitator; 200-Slurry mixing device; 212-Secondary drive rod; 213-Secondary agitator blade; 214-Transfer pipe; 217-Transfer mechanism; 3-Gear set; 31-Main gear; 32-Drive gear; 33-Secondary gear; 300-Slurry mixing device; 400-Mixing tank. Detailed Implementation

[0029] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0030] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0031] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0032] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0033] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0034] Exemplary application scenarios:

[0035] Lithium-ion battery slurry is composed of multiple components, including active materials (such as lithium cobalt oxide for the positive electrode and graphite for the negative electrode), conductive agents (such as carbon black), binders (such as polyvinylidene fluoride), and solvents (such as N-methylpyrrolidone). Slurry mixing devices are used to thoroughly mix these components, ensuring that each component is evenly distributed within the slurry. Existing slurry mixing devices primarily concentrate their agitation blades in the middle or bottom of the mixing tank, making it difficult to adequately agitate the upper slurry. For example, some simple flat-blade agitators concentrate their agitation primarily near the blade's plane of rotation, failing to generate sufficient force to engage the slurry in the higher regions. This results in poor exchange and fusion between the upper and lower parts of the slurry within the mixing tank, requiring a longer agitation time and leading to low mixing efficiency.

[0036] Exemplary slurry mixing paddle and mixing device solution:

[0037] In view of this, the present disclosure provides a slurry mixing paddle solution, which uses a transmission pipe sleeved on a transmission rod and a transmission mechanism to output slurry from the transmission port at the lower end of the transmission pipe to the discharge port at the upper end of the transmission pipe. This allows the well-mixed slurry at the bottom to be transferred to the top, and the slurry at the top that is not yet well-mixed to be squeezed around the mixing blades at the bottom. Therefore, the slurry can be exchanged up and down while mixing, which greatly improves the mixing speed and efficiency.

[0038] Figure 1 An exemplary perspective view of a slurry mixing paddle according to some embodiments of this disclosure is shown.

[0039] As shown in the figure, the slurry mixing paddle of some embodiments disclosed herein includes a support member 11, a transmission rod 12, a mixing blade 13 installed at the lower end of the transmission rod 12, a transmission pipe 14, and a transmission mechanism 17.

[0040] Specifically, such as Figure 1 and Figure 2 As shown, Figure 2 An exemplary cross-sectional view of a slurry mixing impeller according to some embodiments of this disclosure is shown. The support member 11 is used to mount the transfer pipe 14, and the support member 11 can employ various existing structures capable of securing the transfer pipe 14. In this embodiment, the support member 11 is a generally circular plate-shaped support plate having a drive rod hole 110 extending axially through its main body, the upper end of a drive rod 12 extending along this axial direction passing through the drive rod hole 110. There is a certain gap between the drive rod hole 110 and the drive rod 12, or in some embodiments, a bearing may be provided at the drive rod hole 110 to allow the drive rod 12 to be rotatably held therein.

[0041] Those skilled in the art will understand that the support member 11 is used to fix the transmission pipe 14 and provide rotational support for the transmission rod 12. In some embodiments, the support member 11 may also be configured to limit the transmission rod 12 axially relative to the support member 11. However, this disclosure does not limit the specific form of the support member while fulfilling its function. For example, the support member may be a frame structure, and the frame-type support member may be a frame composed of multiple metal rods. The shape of the frame may be triangular, rectangular, or other polygonal. A portion of the frame is fixed to the top of the mixing tank, and the other portion is connected to the transmission pipe.

[0042] The transfer pipe 14 is generally hollow, and its upper end can be connected to the lower end face of the support member 11 by welding, bolting, or a slot. For example, a slot is formed on the lower surface of the support member 11, and the upper end of the transfer pipe 14 is embedded in the slot in a shape-fitting and / or size-fitting manner to achieve a tight fixation. The support member 11 can be fixedly connected to the circumferential portion of the end of the transfer pipe 14 at the same time to evenly distribute the weight of the transfer pipe 14, avoid stress concentration at a certain point, and ensure that the transfer pipe 14 is stably supported in all directions, reducing the risk of poor slurry flow caused by the swaying or tilting of the transfer pipe 14. The transmission rod 12 is generally long, with its upper end rotatably inserted into the transmission rod hole 110 of the support member 11, and its lower end extending downward away from the lower end of the support member 11 and extending into the transfer pipe 14, so as to be at least partially surrounded by the transfer pipe 14. The lower end of the transmission rod 12 is fixedly connected to the center portion of the stirring blade 13 to drive the stirring blade 13 to rotate and stir the slurry. The portion between the lower end of the transmission rod 12 and the lower end of the support member 11 is provided with a transmission mechanism 17 that surrounds the transmission rod circumferentially and extends axially. The transmission mechanism 17 is used to cooperate with the transmission pipe 14 to convey the slurry axially during stirring, so as to make the stirring more uniform.

[0043] like Figure 2 As shown, in this embodiment, the transmission mechanism 17 is formed as a helical blade fixedly disposed on the circumferential outer side of the transmission rod 12 and extending helically along the axial direction of the transmission rod 12. Thus, when the transmission rod 12 rotates, the transmission mechanism 17 will also rotate together, thereby pushing the slurry upward while stirring it through the rotational propulsion action of the helical blade.

[0044] See also Figures 2 to 4 , Figure 3 A schematic diagram of the transfer pipe of the slurry mixing paddle according to some embodiments of this disclosure is shown; Figure 4A schematic diagram of the transfer pipe of the slurry mixing paddle according to some embodiments of this disclosure is shown from another direction. A transfer port 15 for transferring slurry is provided at the lower part of the transfer pipe 14, i.e., on the side closer to the mixing blade 13 along the axial direction, and a discharge port 16 for discharging slurry is provided at the upper part of the transfer pipe 14, i.e., on the side farther from the mixing blade 13 along the axial direction. Thus, a vertical channel 140 for conveying slurry in the vertical direction is formed within the transfer pipe 14, with the transfer port 15 and discharge port 16 forming the inlet and outlet of the vertical channel 140, respectively. Within the vertical channel 140, when the transfer mechanism 17 rotates, the slurry between the inner wall of the transfer pipe 14 and the transfer mechanism 17 and the drive rod 12 is conveyed upwards by the transfer mechanism 17. After being conveyed to the upper side, the slurry is discharged through the discharge port 16 and sinks during subsequent mixing, thereby achieving the circulation and exchange of the bottom and upper layers of the slurry.

[0045] The outer periphery of the blades of the transfer mechanism 17 can be configured to have a small gap with the inner wall of the transfer pipe 14 to enhance the negative pressure suction of the transfer mechanism 17 on the slurry below when it rotates. The transfer pipe 14 can be made of materials such as stainless steel or plastic (e.g., polytetrafluoroethylene). Preferably, the transfer pipe 14 is a straight cylindrical pipe. The internal channel of the transfer pipe 14 is straight, resulting in less resistance when the slurry flows within the straight pipe, enabling smoother transfer. Simultaneously, according to fluid mechanics principles, the straight pipe's flow channel shape makes the slurry flow relatively stable, reducing energy loss and turbulence caused by changes in pipe shape, and helping to maintain the original properties of the slurry.

[0046] The transmission port 15 at the lower part of the transmission pipe 14 can be located on the side of the transmission pipe 14 near the bottom area. Preferably, the transmission port 15 is an open end at the lower end of the transmission pipe 14, which can cooperate with the rotation of the stirring blade 13 located below to collect the slurry, and can also utilize the gravity of the slurry to fill the transmission pipe 14 under its own weight, avoiding the generation of air bubbles.

[0047] The discharge port 16 at the upper part of the transmission pipe 14 is preferably located on the radial side wall of the transmission pipe 14, which can, to a certain extent, prevent the slurry transported to the upper side from splashing due to gravity when it is discharged from the discharge port 16. Figure 1 , Figure 2As shown, the discharge port 16 is located below the support member 11. Those skilled in the art will understand that in some other embodiments not shown, the discharge port can also be formed in other forms. For example, it can be formed as a branch discharge port that protrudes outward relative to the pipe wall, or it can be configured as multiple small openings in a honeycomb pattern, or as multiple long strip openings in a fence pattern, etc., as long as it can ensure the smooth discharge of the slurry. Furthermore, although the above describes a scheme in which the transmission port 15 and the discharge port 16 are respectively arranged axially on the lower and upper sides of the transmission pipe 14, the specific positions of the transmission port 15 and the discharge port 16 are not limited in this disclosure; they can simply be arranged at different positions in the axial direction of the transmission pipe 14.

[0048] When the slurry is discharged from the transmission pipe 14, if only one discharge port 16 is provided on the side of the transmission pipe 14, it may exert a large pressure on the pipe wall on the side of the discharge port 16. Therefore, more preferably, as Figure 3 , Figure 4 As shown, each transmission pipe 14 has two discharge ports 16, which are arranged opposite to each other. By setting two opposite discharge ports 16, the slurry can be discharged simultaneously in opposite directions, offsetting some of the lateral pressure. This makes the pressure distribution more uniform when the transmission pipe 14 transports the slurry, reducing the risk of damage to the transmission pipe due to excessive local pressure. At the same time, it also increases the discharge flow rate, reduces the discharge pressure of a single discharge port, and makes the liquid flow near the discharge port 16 more stable.

[0049] See Figure 1 and Figure 2 When the drive rod 12 rotates, the helical blades of the transmission mechanism 17 push the slurry upward along the transmission pipe 14. The pitch and shape of the helical blades can be determined according to the properties of the slurry and the conveying requirements. For example, for more viscous slurries, a smaller pitch can be used to increase the pushing effect of the blades on the slurry. By selecting helical blades, the viscous resistance of the slurry can be effectively overcome, and the slurry can be stably conveyed from the lower end to the upper end of the transmission pipe 14. Moreover, during the helical conveying process, the flow state of the slurry is relatively stable, without large fluctuations or turbulence, which is beneficial to maintaining the uniformity of the slurry.

[0050] Those skilled in the art will understand that although the above description presents a design for the transmission mechanism 17 including helical blades fixed to the outer periphery of the transmission rod 12, this disclosure does not limit the specific structure and working principle of the transmission mechanism 17. It is only necessary that it can drive the slurry upwards while simultaneously agitating it, transferring it from the transmission port 15 to the discharge port 16. The transmission mechanism 17 can employ various suitable existing structures; for example, a centrifugal pump can be used, utilizing the high-speed rotation of the centrifugal pump impeller to generate centrifugal force, drawing the slurry from the lower transmission port 15 of the transmission pipe 14 and discharging it from the upper discharge port 16.

[0051] In the above-disclosed embodiment, the slurry mixing paddle uses a transmission mechanism 17 to discharge slurry from the transmission port 15 at the lower end of the transmission pipe 14 through the transmission pipe 14 to the discharge port 16 at the upper end. This mechanism can transfer the slurry mixed by the mixing blades 13 at the lower end of the transmission rod 12 to the upper end, and squeeze the slurry that has not yet been mixed to the lower mixing blades 13. Therefore, the slurry can be switched up and down while mixing, which improves the mixing speed, achieves the purpose of faster mixing, and improves the mixing efficiency.

[0052] In some embodiments disclosed herein, such as Figure 1 As shown, the slurry-facing surface 131 of the stirring blade 13 (i.e., the surface on which the stirring blade exerts a thrust on the slurry during rotation) is inclined toward the direction of the transmission rod 12, so that the stirring blade 13 can be pushed by the rotation of the inclined slurry-facing surface to move the slurry closer to the transmission port 15 during the stirring process. In this embodiment, by tilting the slurry-facing surface 131 of the stirring blade 13 upward, it can cooperate with the transmission pipe 14 to form an efficient slurry circulation system. The stirring blade 13 pushes the slurry in the bottom area of ​​the mixing tank upward, and the transmission pipe 14 can squeeze the slurry above downward by its own weight, so that the slurry forms an up-and-down circulation in the mixing tank. This helps the active materials, conductive agents, and binders of the lithium battery slurry to be fully mixed in the vertical direction, avoiding stratification and ensuring that the composition of each part of the slurry is uniform. Meanwhile, the slurry-facing surface 131 of the stirring blade 13 is inclined upwards. When pushing the slurry, more shearing zones are formed between the stirring blade 13 and the slurry. When the slurry flows upwards along the inclined blade surface, a stronger shearing force is generated due to the angle between the movement direction of the stirring blade 13 and the flow direction of the slurry. This shearing force can effectively break up the agglomerated slurry particles, making the particle size more uniform, thereby improving the charging and discharging efficiency and cycle life of the battery.

[0053] In summary, the slurry mixing paddle provided by this utility model, through the transmission mechanism 17, outputs slurry from the transmission port 15 at the lower end of the transmission pipe 14 through the transmission pipe 14 to the discharge port 16 at the upper end. It can transfer the slurry mixed at the bottom of the mixing tank to the top and squeeze the slurry that is not mixed at the top to the area around the mixing blades below. Therefore, the slurry can be exchanged up and down while mixing, which improves the mixing speed and efficiency.

[0054] See Figure 5 , Figure 5 An exemplary side view of a slurry mixing apparatus according to some embodiments of this disclosure is shown, wherein the outline of the mixing tank is shown in dashed lines to indicate the internal structure. This disclosure also provides a slurry mixing apparatus 200, including a mixing tank 400 and a main mixing paddle 1, the main mixing paddle 1 being the slurry mixing paddle of the disclosed embodiments above, with the mixing blades 13 of the main mixing paddle 1 located in the bottom region of the mixing tank 400. That is, the drive rod 12 of the main mixing paddle 1 extends close to the bottom region of the mixing tank 400, causing the mixing blades 13 to be close to the bottom region of the mixing tank 400. By configuring the main mixing paddle 1 with a transmission pipe 14 and the mixing blades 13 located in the bottom region of the mixing tank 400, this slurry mixing apparatus 200 can transfer the slurry mixed in the bottom region of the mixing tank 400 to the top, and compress the slurry that is not yet mixed to the top around the mixing blades 13 below, thereby increasing the mixing speed and improving the mixing efficiency.

[0055] See Figure 6 and Figure 7 , Figure 6 An exemplary perspective view of a slurry mixing apparatus according to some embodiments of the present disclosure is shown, wherein the outline of the mixing tank is shown in dashed lines to indicate the internal structure; Figure 7 An exemplary cross-sectional view of a slurry mixing apparatus according to some embodiments of this disclosure is shown. In other embodiments of this disclosure, such as... Figure 6As shown, the slurry mixing device 300 also includes an auxiliary mixing blade 2. The basic structure of the auxiliary mixing blade 2 is basically the same as that of the slurry mixing blade in the above-disclosed embodiment. The main difference between the auxiliary mixing blade 2 and the main mixing blade 1 lies in the different positions and dimensions of some of its components. Specifically, the support for the main mixing blade 1 and the auxiliary mixing blade 2 can be the same support 11. The lengths of the auxiliary transmission rod 212, the transmission pipe 214, and the transmission mechanism 217 of the auxiliary mixing blade 2 are all shorter than the lengths of the transmission rod 12, the transmission pipe 14, and the transmission mechanism 17 of the main mixing blade 1, so that the auxiliary mixing blade 213 of the auxiliary mixing blade 2 is located above the mixing blade 13 of the main mixing blade 1; that is, the auxiliary mixing blade 213 of the auxiliary mixing blade 2 is farther away from the bottom region of the mixing tank 400 relative to the mixing blade 13 of the main mixing blade 1. Those skilled in the art will understand that, although the above embodiments describe a scheme in which the main impeller 1 and the auxiliary impeller 2 share a single support member 11, in some other embodiments, the two may have different support members, and the different support members may be fixed to each other or to the same bracket.

[0056] The specific position of the auxiliary stirring blades 213 of the auxiliary stirring impeller 2 within the mixing tank 400 can be determined according to the characteristics of the lithium battery slurry being stirred, and can be located in the lower middle, middle, or upper middle part of the mixing tank 400, etc. The number of auxiliary stirring impellers 2 can be one or more, for example... Figure 2 Two auxiliary stirring paddles 2 are shown. When there are multiple auxiliary stirring paddles 2, the height of the auxiliary stirring blades 213 of each auxiliary stirring paddle 2 in the mixing tank 400 can be the same or different. The stirring blades 13 of the main stirring paddle 1 and the auxiliary stirring blades 213 of the auxiliary stirring paddle 2 preferably rotate in the same direction. In this way, the main stirring paddle 1 and the auxiliary stirring paddle 2 will generate radial flows outward or inward within their respective circumferences. After these radial flows are superimposed, the slurry will spread more fully in the horizontal direction. This enhanced radial flow can ensure that various components (such as active substances, binders, conductive agents, etc.) are more evenly distributed in the radial range of the mixing tank, which can effectively reduce the local enrichment of components. The discharge port 16 of the main stirring paddle 1 is preferably located above the liquid surface of the slurry in the mixing tank 400, thereby better squeezing the slurry that has not been properly stirred above the mixing tank 400 to the bottom.

[0057] In this embodiment, the stirring blades 13 of the main stirring paddle 1 are located at the bottom of the mixing tank 400. They can transfer the well-mixed slurry at the bottom of the mixing tank to the top and squeeze the slurry that is not yet well-mixed at the top to the area around the stirring blades 13 below the main stirring paddle 1. At the same time, the auxiliary stirring blades 213 of the auxiliary stirring paddle 2 are located above the stirring blades 13 of the main stirring paddle 1. They can transfer the well-mixed slurry in the middle (or lower middle, or upper middle) of the mixing tank 400 to the top and squeeze the slurry that is not yet well-mixed at the top to the area around the auxiliary stirring blades 213 below the auxiliary stirring paddle 2. The coordinated work of the main stirring paddle 1 and the auxiliary stirring paddle 2 can ensure that the slurry in different positions throughout the mixing tank 400 is fully mixed, thereby improving the mixing efficiency and uniformity.

[0058] In this invention, the main stirring paddle 1 and the auxiliary stirring paddle 2 can adopt various existing driving methods. For example, the main stirring paddle 1 and the auxiliary stirring paddle 2 can be driven by different driving devices (such as motors), and each driving device can be connected to the corresponding transmission rod through a coupling or a transmission belt or other connecting component.

[0059] In some embodiments disclosed herein, the main impeller 1 and the auxiliary impeller 2 can be driven by a single drive device (such as a motor) and by a transmission system (such as gear transmission, chain transmission, or multi-stage belt transmission). Reference Figures 6 to 8 As shown, Figure 8 An exemplary top view of a slurry mixing apparatus according to some embodiments of this disclosure is shown, wherein the drive rod of the main mixing blade 1 and the drive rod of the auxiliary mixing blade 2 are connected by a gear set 3.

[0060] Specifically, the gear set 3 may include multiple meshing gears, and the driving force is transmitted synchronously through the meshing of these multiple gears. For example, in... Figures 6 to 8 In the illustrated embodiment, the upper end of the drive rod 12 of the main impeller 1 passes through the drive rod hole 110 of the support member 11 and extends out from the upper side of the support member 11. Similarly, the upper end of the auxiliary drive rod 212 of the auxiliary impeller 2 also passes through the corresponding auxiliary drive rod hole 112 on the support member 11 and extends out from the upper side of the support member 11. The gear set 3 may include a main gear 31 fixedly connected to the upper end of the drive rod 12 of the main impeller 1, two drive gears 32 rotatably disposed on the upper side of the support member 11 and respectively meshing with the main gear 31, and two auxiliary gears 33 fixedly connected to the upper end of the auxiliary drive rod 212 of one auxiliary impeller 2, wherein each auxiliary gear 33 meshes with a corresponding drive gear 32. Thus, the transmission device can be connected to the main gear 31 to distribute the driving force to each impeller through the meshing between the gears.

[0061] In this transmission method, the power of the drive device is distributed through gear set 3, causing the main and auxiliary agitators to operate according to a certain speed ratio and direction relationship. For example, the speed ratio of the main agitator 1 to the auxiliary agitator 2 can be set to 2:1, that is, the main agitator rotates twice and the auxiliary agitator rotates once, to achieve a specific stirring effect. Those skilled in the art will understand that although the above describes a scheme for driving multiple agitators using a gear set, this disclosure does not limit the specific method of driving the agitators. For example, the drive shafts of multiple agitators can be connected to each other via a drive belt, or a clutch mechanism can be provided between the main and auxiliary agitators to select which agitator needs to be started as needed.

[0062] By connecting the main agitator 1 and the auxiliary agitator 2 through a gear set 3, they achieve good synchronization. Driven by the same power source and transmission system, their rotational speed and direction are more closely coordinated. This ensures that the main agitator 1 and the auxiliary agitator 2 work collaboratively in a predetermined manner, improving mixing efficiency and quality, especially when simultaneously mixing upper and lower layers of slurry with strict time and space coordination requirements.

[0063] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A slurry mixing paddle, comprising: The transmission rod (12) extending in the axial direction and the stirring blade (13) mounted on the transmission rod (12) are characterized in that they further include: The transmission pipe (14) is also fitted outside the transmission rod (12), and the transmission pipe (14) also includes a transmission port (15) for transmitting slurry and a discharge port (16) for discharging slurry; the transmission port (15) and the discharge port (16) are located at different positions of the transmission pipe (14) in the axial direction; The transmission rod (12) further includes a transmission mechanism (17) arranged circumferentially around the transmission rod (12) and extending along the axial direction. The transmission mechanism (17) cooperates with the transmission pipe (14) to transmit the slurry from the transmission port (15) to the discharge port (16).

2. The slurry mixing paddle according to claim 1, characterized in that, The transmission mechanism (17) includes a spiral blade fixedly mounted on the transmission rod (12).

3. The slurry mixing paddle according to claim 1, characterized in that, The slurry-facing surface (131) of the stirring blade (13) is inclined toward the direction of the transmission rod (12) so that the stirring blade (13) can push the slurry upward toward the transmission port (15) during the stirring process.

4. The slurry mixing paddle according to claim 1, characterized in that, The transmission port (15) is an open end of the transmission pipe (14) near the stirring blade (13); the discharge port (16) is located at the end of the transmission pipe (14) away from the stirring blade (13).

5. A slurry mixing device, comprising a mixing tank (400) and a main mixing paddle (1), characterized in that, The main stirring paddle (1) is a slurry stirring paddle according to any one of claims 1-4, and the drive rod (12) of the main stirring paddle (1) extends to the bottom region near the mixing tank (400), so that the stirring blade (13) is close to the bottom region of the mixing tank (400).

6. The slurry mixing device according to claim 5, characterized in that, The main stirring paddle (1) is fixed by a support member (11), which is a support plate. The discharge port (16) is located below the support plate. There are two discharge ports (16), which are arranged opposite to each other.

7. The slurry mixing device according to claim 6, characterized in that, The slurry mixing device further includes a secondary mixing blade (2), which is a slurry mixing blade according to any one of claims 1-5, wherein the secondary mixing blade (213) of the secondary mixing blade (2) is located away from the bottom region of the mixing tank (400) relative to the mixing blade (13) of the main mixing blade (1).

8. The slurry mixing device according to claim 7, characterized in that, The drive rod (12) of the main stirring paddle (1) and the auxiliary drive rod (212) of the auxiliary stirring paddle (2) are connected by a gear set (3).

9. The slurry mixing device according to claim 7, characterized in that, The stirring blades (13) of the main stirring paddle (1) and the auxiliary stirring blades (213) of the auxiliary stirring paddle (2) rotate in the same direction.

10. The slurry mixing device according to claim 6, characterized in that, The discharge port (16) of the main stirring paddle (1) is located above the liquid surface of the slurry in the mixing tank (400).

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