Conical powder mixing device and use method

Abstract

The invention belongs to the technical field of electrode preparation, and particularly relates to a conical powder mixing device and a use method. The device comprises a base and a mounting frame fixedly mounted on the base; a material barrel; a stirring assembly; a driving assembly; the stirring assembly comprises a stirring shaft connected with the driving assembly, and at least one forward-pushing stirring paddle and at least one reverse-pushing stirring paddle which are sequentially and coaxially arranged with the stirring shaft; any adjacent forward-pushing stirring paddles, any adjacent reverse-pushing stirring paddles, and adjacent forward-pushing stirring paddles and reverse-pushing stirring paddles are arranged vertically; and during clockwise stirring, all the stirring blades are pushed to the connecting center of the forward-pushing stirring blade and the backward-pushing stirring blade. When the materials are stirred anticlockwise, the forward-pushing stirring paddle and the reverse-pushing stirring paddle push the materials towards the two ends of the conical material barrel, circulation, impact and extrusion of the materials can be achieved at the low rotating speed, high mixing efficiency and mixing quality are achieved, and meanwhile the good powder fibration effect is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of electrode preparation, and particularly relates to a conical powder mixing device and a use method thereof. Background Art

[0002] The development of new energy has entered a boom period. Lithium-ion power battery vehicles and energy storage have become the two main applications of lithium-ion batteries in the new era. The market requirements are increasingly tending towards high energy density and high power. The manufacturing of lithium-ion mainly includes two technological innovations: new materials and new processes.

[0003] The dry electrode technology is a new preparation process different from the wet process. The dry electrode technology does not use or uses a small amount of solvent. Compared with the wet process, it saves a lot of energy consumption and solvent recovery costs, while saving dozens of meters of baking channels and reducing investment costs. Therefore, it has cost advantages. At the same time, dry electrodes can prepare thicker electrodes, so that the electrode is no longer limited to the crack thickness of the coating. To realize this technology, the equipment used is different from the wet coating equipment, and is more sophisticated and complex. The process technology at the front end of the electrode preparation is completely different from the wet method.

[0004] In the preparation of dry electrodes, fiberization after dry powder mixing is an important process. Currently, the market mainly uses high-speed mixing and air flow mixing to achieve dry electrode powder fiberization through one-time crushing. This requires the use of mixing equipment with a high shear rate, which not only causes great wear on the equipment and high energy consumption, but more importantly, the high shear strength damages the structure of the active material and affects the electrochemical performance of lithium-ion batteries. However, a slightly lower shear strength makes it difficult to achieve sufficient fiberization, which is not satisfactory for dry electrode preparation. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the prior art in destroying the chemical properties of powders and insufficient powder fiberization, and to provide a conical powder mixing device and a method for use thereof with low speed, high efficiency, high mixing quality and good powder fiberization effect.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] As a first aspect, a conical powder mixing device comprises:

[0008] a base and a mounting frame fixedly mounted on the base;

[0009] a material barrel, mounted on the frame;

[0010] A stirring assembly is rotatably mounted on one end of the barrel;

[0011] A driving assembly is mounted on the mounting frame and is in transmission connection with the stirring assembly;

[0012] The stirring assembly includes: a stirring shaft connected to the driving assembly, at least one forward-pushing stirring paddle and at least one reverse-pushing stirring paddle that are coaxially arranged with the stirring shaft in sequence; any adjacent forward-pushing stirring paddles, any adjacent reverse-pushing stirring paddles, and adjacent forward-pushing and reverse-pushing stirring paddles are all vertically arranged;

[0013] When stirring clockwise, the pushing direction of the forward-pushing stirring paddle on the material is along the positive direction of the X-axis, and the pushing direction of the reverse-pushing stirring paddle on the material is along the negative direction of the X-axis, both pushing towards the connection center of the forward-pushing stirring paddle and the reverse-pushing stirring paddle;

[0014] When stirring counterclockwise, both the forward-pushing stirring paddle and the reverse-pushing stirring paddle push the material towards both ends of the conical bucket.

[0015] Further, the forward-pushing stirring paddle includes a forward-pushing connecting pipe for sleeving on the stirring shaft, a first forward-pushing blade and a second forward-pushing blade correspondingly installed on the forward-pushing connecting pipe; the included angles a between the first forward-pushing blade, the second forward-pushing blade and the vertical plane are all obtuse angles;

[0016] The reverse-pushing stirring paddle includes a reverse-pushing connecting pipe for sleeving on the stirring shaft, a first reverse-pushing blade and a second reverse-pushing blade correspondingly installed on the reverse-pushing connecting pipe; the included angles b between the first reverse-pushing blade, the second reverse-pushing blade and the vertical plane are all acute angles.

[0017] Further, one forward-pushing stirring paddle and one reverse-pushing stirring paddle are provided respectively.

[0018] Further, three forward-pushing stirring paddles and three reverse-pushing stirring paddles are provided respectively. The three forward-pushing stirring paddles are respectively a left forward-pushing stirring paddle, a middle forward-pushing stirring paddle, and a right forward-pushing stirring paddle; the three reverse-pushing stirring paddles are respectively a left reverse-pushing stirring paddle, a middle reverse-pushing stirring paddle, and a right reverse-pushing stirring paddle;

[0019] During the clockwise stirring process, the left forward-pushing stirring paddle pushes the material towards the middle forward-pushing stirring paddle, and the middle forward-pushing stirring paddle pushes the material towards the right forward-pushing stirring paddle; the right reverse-pushing stirring paddle pushes the material towards the middle reverse-pushing stirring paddle, and the middle reverse-pushing stirring paddle pushes towards the left reverse-pushing stirring paddle.

[0020] Further, the bucket adopts a conical bucket, and the diameters of both ends of the conical bucket are smaller than the middle diameter.

[0021] Further, the stirring diameters at the right ends of the middle forward-pushing stirring paddle and the right forward-pushing stirring paddle are larger than those at their left ends;

[0022] The stirring diameters at the left ends of the left reverse-pushing stirring paddle and the middle reverse-pushing stirring paddle are larger than those at their right ends.

[0023] Further, the driving assembly includes a driving motor fixedly installed on the mounting frame, a driving pulley coaxially arranged with the output shaft of the driving motor, and a driven pulley drivingly connected to the driving pulley through a transmission belt.

[0024] Further, the stirring shaft is rotatably installed on the mounting frame through a rotating mechanism. The rotating mechanism and the driving motor are arranged side by side vertically in the mounting frame, and the axis of the stirring shaft is parallel to the axis of the output shaft of the driving motor.

[0025] Further, the rotating mechanism includes a bearing seat, a left bearing and a right bearing installed in the bearing seat, and a sealing assembly installed between the left bearing and the bearing seat; the sealing assembly includes:

[0026] a dry gas seal seat fixedly installed at the upper end of the bearing seat, and a cover plate covering the right end face of the dry gas seal seat;

[0027] a first sealing cavity formed by enclosing the stirring shaft, the dry gas seal seat and the cover plate;

[0028] a second sealing cavity arranged between the cover plate and the left bearing;

[0029] an air inlet hole opened on the bearing seat and the dry gas seal seat, one end of the air inlet hole is communicated with the first sealing cavity, and the other end is communicated with an external gas source air path;

[0030] an air outlet hole opened on the bearing seat, and is communicated with the second sealing cavity in an air path;

[0031] and a first push ring, a first stationary ring, a moving ring, a second stationary ring and a second push ring arranged in sequence from right to left in the first sealing cavity; the first push ring, the first stationary ring, the moving ring, the second stationary ring and the second push ring are all sleeved on the stirring shaft; the moving ring rotates following the stirring shaft, and the first stationary ring and the second stationary ring are in clearance fit with the stirring shaft.

[0032] As a second aspect, the use method of the above-mentioned conical powder mixing device includes the following contents:

[0033] Add materials into the conical material bucket according to the ratio.

[0034] According to the stirring requirements, select a stirring mode; the stirring mode includes a clockwise stirring mode, a counterclockwise stirring mode, and a clockwise / counterclockwise alternating mode;

[0035] Start the external gas source to inflate the sealing assembly;

[0036] According to the selected stirring mode, control the forward and reverse operation of the driving component, that is, stir the material in an inner circulation by gathering towards the center, or stir the material in an outer circulation by dispersing towards both ends, or stir in an alternating inner circulation / outer circulation;

[0037] After the stirring is completed, first stop the external air source from inflating the sealing component, and then stop the driving component.

[0038] The beneficial effects of a conical powder mixing device and its usage method of the present invention are as follows:

[0039] The present invention is provided with at least one forward pushing stirring paddle and one reverse pushing stirring paddle, so that the pushing directions of the forward pushing stirring paddle and the reverse pushing stirring paddle on the material are always opposite. When stirring clockwise, the forward pushing stirring paddle and the reverse pushing stirring paddle push the material towards the connection center of the two, bringing the material closer to the middle for stirring, so that the material forms an inner circulation stirring. When stirring counterclockwise, the forward pushing stirring paddle and the reverse pushing stirring paddle push the material to disperse towards both ends of the conical material bucket, so that the material forms an outer circulation stirring. By using a relatively small rotational speed, the circulation, impact, and extrusion of the material can be achieved, reaching a higher mixing efficiency and mixing quality, while ensuring a better powder fiberization effect.

[0040] The material bucket of the present invention adopts a conical material bucket, and the stirring diameters of the forward pushing stirring paddle and the reverse pushing stirring paddle near both ends of the conical material bucket are designed to be in a shape that fits the conical shapes at both ends of the conical material bucket, ensuring the cooperation between the stirring paddle and the material bucket, that is, ensuring the length of the stirring paddle as much as possible without affecting each other with the material bucket. Description of the Drawings

[0041] The following further elaborates on the present invention in detail in conjunction with the drawings and specific embodiments.

[0042] Figure 1 is a three-dimensional view of the conical powder mixing device according to Embodiment 1 of the present invention.

[0043] Figure 2 is a cross-sectional view of the conical powder mixing device according to Embodiment 1 of the present invention.

[0044] Figure 3 is an installation view of the stirring component and the driving component according to Embodiment 1 of the present invention.

[0045] Figure 4 is Figure 3 a left view of

[0046] Figure 5 is a structural schematic diagram of the forward pushing stirring paddle according to Embodiment 1 of the present invention.

[0047] Figure 6 is a structural schematic diagram of the reverse pushing stirring paddle according to Embodiment 1 of the present invention.

[0048] Figure 7 isFigure 2 Enlarged view of point A in the middle.

[0049] Figure 8 This is a cross-sectional view of a conical powder mixing device according to embodiment 2 of the present invention.

[0050] Figure 9 This is an installation diagram of the stirring assembly and the driving assembly of the second embodiment of the present invention.

[0051] Figure 10 It is a structural schematic diagram of the stirring assembly of the second embodiment of the present invention.

[0052] Figure 11 This is a detailed view of the stirring assembly of the second embodiment of the present invention.

[0053] Figure 12 This is a flow chart of the method of using the third embodiment of the present invention.

[0054] In the figure: 1, base, 2, mounting frame, 3, material barrel, 4, stirring assembly, 41, stirring shaft, 42, forward stirring paddle, 42-1, left forward stirring paddle, 42-2, middle forward stirring paddle, 42-3, right forward stirring paddle, 421, forward connecting pipe, 422, first forward blade, 423, second forward blade, 43, reverse stirring paddle, 43-1, left reverse stirring paddle, 43-2, middle reverse stirring paddle, 43-3, right reverse stirring paddle, 431, reverse connecting pipe, 432, first reverse blade, 433 , second reverse thrust blade, 5, drive assembly, 51, drive motor, 52, active pulley, 53, transmission belt, 54, driven pulley, 6, rotating mechanism, 61, bearing seat, 62, left bearing, 63, right bearing, 64, sealing assembly, 641, dry gas sealing seat, 642, cover plate, 643, first sealing chamber, 644, second sealing chamber, 645, air inlet, 646, air outlet, 647, first thrust ring, 648, first static ring, 649, dynamic ring, 6410, second static ring, 6411, second thrust ring. DETAILED DESCRIPTION

[0055] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0056] Example 1

[0057] like Figures 1 - 7A specific embodiment of a conical powder mixing device of the present invention shown in the figure includes: a base 1, a mounting frame 2 fixedly installed on the base 1, a material barrel 3 installed on the frame, a stirring assembly 4 rotatably installed at one end of the material barrel 3, and a driving assembly 5 installed on the mounting frame 2, and the driving assembly 5 is in transmission connection with the stirring assembly 4. Specifically, the stirring assembly 4 includes a stirring shaft 41 connected to the driving assembly 5, at least one forward pushing stirring paddle 42 and at least one reverse pushing stirring paddle 43 coaxially arranged with the stirring shaft 41 in sequence; any adjacent forward pushing stirring paddles 42, any adjacent reverse pushing stirring paddles 43, and adjacent forward pushing stirring paddles 42 and reverse pushing stirring paddles 43 are all vertically arranged. When stirring clockwise, the pushing direction of the forward pushing stirring paddle 42 on the material is along the positive direction of the X-axis, and the pushing direction of the reverse pushing stirring paddle 43 on the material is along the negative direction of the X-axis, both pushing towards the connection center of the forward pushing stirring paddle 42 and the reverse pushing stirring paddle 43. When stirring counterclockwise, the forward pushing stirring paddle 42 and the reverse pushing stirring paddle 43 both push the material towards both ends of the material barrel 3.

[0058] In the present invention, at least one forward pushing stirring paddle 42 and one reverse pushing stirring paddle 43 are provided, changing the concept of stirring with the same pushing direction of multiple stirring paddles in the traditional horizontal mixing device, so that the pushing directions of the forward pushing stirring paddle 42 and the reverse pushing stirring paddle 43 on the material are always opposite. In the design of this first embodiment, one forward pushing stirring paddle 42 and one reverse pushing stirring paddle 43 are provided. Specifically, when stirring clockwise, the forward pushing stirring paddle 42 and the reverse pushing stirring paddle 43 push the material towards their connection center, making the material move closer to the middle for stirring, so that the material forms an internal circulation stirring. When stirring counterclockwise, the forward pushing stirring paddle 42 and the reverse pushing stirring paddle 43 push the material towards both ends of the material barrel 3 for dispersion, so that the material forms an external circulation stirring. By using a relatively small rotation speed, the circulation, impact, and extrusion of the material can be realized to achieve a higher mixing efficiency and mixing quality, while ensuring a better powder fiberization effect. It should be noted that in this embodiment, the X-axis, Y-axis, and Z-axis directions are all based on the Figure 1 coordinates in, and their counterclockwise and clockwise directions are both referenced to the clockwise and clockwise directions in Figure 4 .

[0059] This embodiment takes the connection center of the forward pushing stirring paddle 42 and the reverse pushing stirring paddle 43 as the center point, and pushes the material towards the center or towards both ends along the X-axis direction for circular pushing. By controlling the rotation of the stirring shaft 41, the forward pushing stirring paddle 42 and the reverse pushing stirring paddle 43 can be made to push the material relatively or in the opposite direction, impacting, extruding, and circulating the material, ensuring a higher mixing quality and mixing efficiency.

[0060] Here, it needs to be explained in detail that, as Figure 5As shown in the figure, the forward pushing stirring paddle 42 in this embodiment includes a forward pushing connecting pipe 421 sleeved on the stirring shaft 41, a first forward pushing blade 422 and a second forward pushing blade 423 correspondingly installed on the forward pushing connecting pipe 421; the included angles a between the first forward pushing blade 422, the second forward pushing blade 423 and the vertical plane are both obtuse angles, and the pushing directions of the materials are as Figure 2 shown, perpendicular to the first forward pushing blade 422 or the second forward pushing blade 423 and inclined upward or downward.

[0061] As Figure 6 shown, the reverse pushing stirring paddle 43 in this embodiment includes a reverse pushing connecting pipe 431 sleeved on the stirring shaft 41, a first reverse pushing blade 432 and a second reverse pushing blade 433 correspondingly installed on the reverse pushing connecting pipe 431; the included angles b between the first reverse pushing blade 432, the second reverse pushing blade 433 and the vertical plane are both acute angles, and the pushing directions of the materials are as Figure 3 shown, perpendicular to the first reverse pushing blade 432 or the second reverse pushing blade 433 and inclined upward or downward.

[0062] The material bucket 3 in this embodiment adopts a horizontal conical material bucket. The diameters at both ends of the horizontal conical material bucket are smaller than the middle diameter, and both the top and bottom of the horizontal conical material bucket are conical. It should be understood that a feed port and a discharge port are provided on the material bucket 3 in this embodiment. In addition to being opened or closed by a closing mechanism, the closing mechanism in this embodiment adopts the prior art, and the specific structure thereof will not be described in detail here.

[0063] The driving assembly 5 in this embodiment includes a driving motor 51 fixedly installed on the mounting frame 2, a driving pulley 52 coaxially arranged with the output shaft of the driving motor 51, and a driven pulley 54 drivingly connected to the driving pulley 52 through a transmission belt 53. Of course, a gearbox or a chain drive can also be used to realize the driving of the stirring shaft 41 by the driving motor 51. Here, only based on the actual requirement of low noise, the belt drive in this embodiment is adopted.

[0064] As Figure 3 shown, the stirring shaft 41 in this embodiment is rotatably installed on the mounting frame 2 through a rotating mechanism 6. The rotating mechanism 6 and the driving motor 51 are arranged side by side up and down in the mounting frame 2, and the axis of the stirring shaft 41 is parallel to the axis of the output shaft of the driving motor 51. Arranging the rotating mechanism 6 and the driving motor 51 in parallel inside the same mounting frame 2 can greatly reduce the overall volume of the mixing device, reduce the installation space of the mixing device, and thus increase the applicability of the mixing device in this embodiment.

[0065] See Figure 7, in this embodiment, the rotating mechanism 6 includes a bearing seat 61, a left bearing 62 and a right bearing 63 installed in the bearing seat 61, and a sealing assembly 64 installed between the left bearing 62 and the bearing seat 61. The sealing assembly 64 includes a dry gas seal seat 641 fixedly installed at the left end of the bearing seat 61, a cover plate 642 covering the right end face of the dry gas seal seat 641, and also includes a first sealing cavity 643, a second sealing cavity 644, an air inlet hole 645, and an air outlet hole 646. Among them, the stirring shaft 41, the dry gas seal seat 641, and the cover plate 642 enclose the first sealing cavity 643. A second sealing cavity 644 is provided between the cover plate 642 and the second bearing. The air inlet hole 645 is opened on the bearing seat 61 and the dry gas seal seat 641 and is in gas path communication with the first sealing cavity 643. The air inlet hole 645 is in gas path communication with an external air source. The air outlet hole 646 is opened on the bearing seat 61 and is in communication with the second sealing cavity 644. In the first sealing cavity 643, a first push ring 647, a first stationary ring 648, a moving ring 649, a second stationary ring 6410, and a second push ring 6411 are arranged in sequence from right to left. The first push ring 647, the first stationary ring 648, the moving ring 649, the second stationary ring 6410, and the second push ring 6411 are all sleeved on the stirring shaft 41. The moving ring 649 rotates with the stirring shaft 41. The first stationary ring 648 and the second stationary ring 6410 are in clearance fit with the stirring shaft 41.

[0066] Specifically, the material barrel 3 is installed on the base 1 through the bearing seat 61. The first stationary ring 648 and the second stationary ring 6410 are respectively installed at the left and right ends of the moving ring 649. The first push ring 647 and the second push ring 6411 are respectively arranged on the left and right sides of the corresponding stationary ring. During installation, in order to connect the stirring shaft 41 with the power mechanism and the stirring assembly 4, the stirring shaft 41 passes through the cover plate 642 and the dry gas seal seat 641. An air inlet hole 645 communicating with an external air source is opened on the bearing seat 61 and the dry gas seal seat 641. And an air outlet hole 646 is opened on the bearing seat 61 corresponding to the right side of the air inlet hole 645. During use, clean gas is injected into the first sealing cavity 643 through an external air source. Under the action of pressure, the clean gas flows in the left and right directions of the first sealing cavity 643, thereby blocking the powder in the material barrel 3 from entering the bearing seat 61 along the X-axis direction.

[0067] When the drive assembly 5 is started, the moving ring 649 rotates with the stirring shaft 41, and the first stationary ring 648 and the second stationary ring 6410 remain stationary. Under high-speed rotation, a stable air film is formed in the small gaps on the sealing surfaces between the first stationary ring 648 and the moving ring 649, and between the second stationary ring 6410 and the moving ring 649. On the one hand, it can effectively prevent powder from leaking into the bearing, preventing the entry of powder from corroding the equipment and increasing friction between parts, thereby avoiding the reduction in the service life of the equipment due to corrosion and friction. On the other hand, it can prevent powder leakage, ensure the accuracy of the formula ratio, and effectively improve the mixing effect. The sealing assembly 64 in this embodiment uses dry gas sealing, so that the contact surfaces between the stationary ring and the moving ring 649 are separated from each other, avoiding the phenomenon of heat caused by friction between the stationary ring and the moving ring 649, preventing high temperature from being generated inside the sealing assembly 64, and extending the service life of the equipment.

[0068] The thickness of the air film formed in this embodiment is between a few microns and tens of microns, ensuring that the dynamic ring 649 and the first static ring 648 and the second static ring 6410 are not in direct contact. The presence of the air film reduces the friction and wear between the two static rings and the dynamic ring 649. It can also prevent powder leakage, further ensure the accuracy of the formula ratio, and effectively improve the mixing effect. The air film not only plays a lubricating role, but also effectively prevents the leakage of process gas. The gas flows from the high-pressure side process gas side to the low-pressure side atmosphere side, but due to the barrier of the air film, the leakage volume is very small. During operation, the thickness and pressure distribution of the air film will be dynamically adjusted to adapt to changes in speed, pressure and temperature. This dynamic balance ensures the stability and reliability of the seal. The dry gas seal achieves non-contact sealing by forming a stable air film, which is efficient, reliable and environmentally friendly. By forming a stable air film, a high-pressure side is formed in the sealing seat, which can effectively prevent the material in the barrel 3 from leaking, prevent the powder from flowing back and leaking, and since the powder does not leak, it will not corrode the equipment. During stirring, a slight positive pressure is formed in the barrel 3, and external gas and water are not easy to enter the barrel body, thereby avoiding contamination of the material.

[0069] Example 2

[0070] like Figures 8 - 12As shown in the figure, the only different technical solution in the second embodiment from the first embodiment is that three forward stirring paddles 42 and three reverse stirring paddles 43 are provided. Among them, the three forward stirring paddles 42 are respectively the left forward stirring paddle 42-1, the middle forward stirring paddle 42-2, and the right forward stirring paddle 42-3. The three reverse stirring paddles 43 are respectively the left reverse stirring paddle 43-1, the middle reverse stirring paddle 43-2, and the right reverse stirring paddle 43-3. During the clockwise stirring process, the left forward stirring paddle 42-1 pushes the material towards the middle forward stirring paddle 42-2, and the middle forward stirring paddle 42-2 pushes the material towards the right forward stirring paddle 42-3. The right reverse stirring paddle 43-3 pushes the material towards the middle reverse stirring paddle 43-2, and the middle reverse stirring paddle 43-2 pushes the material towards the left reverse stirring paddle 43-1. That is, during the clockwise stirring process, the three forward stirring paddles 42 push the material to approach the connection center of the right forward stirring paddle 42-3 and the left reverse stirring paddle 43-1 from left to right in sequence, and the three reverse stirring paddles 43 push the material to approach the connection center of the right forward stirring paddle 42-3 and the left reverse stirring paddle 43-1 from right to left in sequence. When stirring counterclockwise, the three forward stirring paddles 42 push the material to move towards the top of the material bucket 3 from right to left in sequence, and the three reverse stirring paddles 43 push the material to move towards the bottom of the material bucket 3 from left to right in sequence. High-quality stirring of the material can be achieved without a high stirring speed, and sufficient fibrillation of the powder can be ensured.

[0071] To ensure the adaptive cooperation with the conical material bucket 3 in this embodiment, the right-end stirring diameters of the middle forward stirring paddle 42-2 and the right forward stirring paddle 42-3 in this embodiment are larger than their left-end stirring diameters, and the left-end stirring diameters of the left reverse stirring paddle 43-1 and the middle reverse stirring paddle 43-2 are larger than their right-end stirring diameters.

[0072] As Figure 5 , Figure 6 and Figures 8 - 11 shown, the reverse stirring paddle 43 in this embodiment includes a reverse connection pipe 431 for sleeving on the stirring shaft 41, a first reverse blade 432 and a second reverse blade 433 correspondingly installed on the reverse connection pipe 431; the included angles b between the first reverse blade 432, the second reverse blade 433 and the vertical plane are both obtuse angles, and the pushing directions of the material are as Figure 3 shown, perpendicular to the first reverse blade 432 or the second reverse blade 433 and inclined upward or downward.

[0073] Embodiment Three

[0074] Based on the usage method of the conical powder mixing device in the above-mentioned Embodiment One or Embodiment Two, as Figure 12 shown, it includes the following contents:

[0075] S10: Add materials into the conical material bucket 3 according to the ratio;

[0076] S20: Select a stirring mode according to the stirring requirements; the stirring modes include a clockwise stirring mode, a counterclockwise stirring mode, and a clockwise / counterclockwise alternating mode;

[0077] S30: Start the external air source to inflate the sealing component 64;

[0078] S40: Control the forward and reverse operation of the driving component 5 according to the selected stirring mode, that is, perform in - center gathering internal - circulation stirring, end - to - end dispersion external - circulation stirring, or internal - circulation / external - circulation alternating stirring on the material;

[0079] S50: After stirring is completed, first stop the external air source from inflating the sealing component 64, and then stop the driving component 5.

[0080] Based on the above - mentioned mixing device and usage method, in specific use, a mixing method for electrode powder that can not only ensure the mixing efficiency but also ensure the proper fibrillation of the powder in this embodiment specifically includes the following:

[0081] Step 1: Add materials to the conical hopper 3 according to the ratio;

[0082] Step 2: Start the external air source to inflate the sealing component 64;

[0083] Step 3: Start the driving component 5 to drive the stirring shaft 41 to rotate clockwise. The pushing directions of the positive - pushing stirring paddle 42 and the reverse - pushing stirring paddle 43 are opposite, and both push towards the middle position of the conical hopper 3;

[0084] Step 4: After mixing is completed, first stop the external air source from inflating the sealing component 64, and then stop the driving component 5.

[0085] Actual verification shows that when mixing and stirring electrode powder, using the conical powder mixing device in Embodiment 1 or Embodiment 2, simply rotating the material clockwise results in the best mixing quality of the mixed powder and sufficient fibrillation.

[0086] It should be understood that the specific embodiments described above are only used to explain the present invention and are not used to limit the present invention. Obvious changes or variations derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A conical powder mixing device, characterized in that, Including: A base and a mounting frame fixedly installed on the base; A material barrel, installed on the rack; A stirring assembly, rotatably installed at one end of the material barrel; A driving assembly, installed on the mounting frame and drivingly connected to the stirring assembly; The stirring assembly includes: a stirring shaft connected to the driving assembly, at least one positive-pushing stirring paddle and at least one reverse-pushing stirring paddle arranged coaxially with the stirring shaft in sequence; Between any adjacent positive-pushing stirring paddles, between any adjacent reverse-pushing stirring paddles, and between adjacent positive-pushing and reverse-pushing stirring paddles are all vertically arranged; When stirring clockwise, the pushing direction of the positive-pushing stirring paddle on the material is along the positive direction of the X-axis, and the pushing direction of the reverse-pushing stirring paddle on the material is along the negative direction of the X-axis, both pushing towards the connection center of the positive-pushing stirring paddle and the reverse-pushing stirring paddle; When stirring counterclockwise, the positive-pushing stirring paddle and the reverse-pushing stirring paddle both push the material towards both ends of the conical material barrel.

2. The conical powder mixing device according to claim 1, wherein: The positive-pushing stirring paddle includes a positive-pushing connecting pipe for sleeving on the stirring shaft, a first positive-pushing blade and a second positive-pushing blade correspondingly installed on the positive-pushing connecting pipe; The included angles a between the first positive-pushing blade, the second positive-pushing blade and the vertical plane are all obtuse angles; The reverse-pushing stirring paddle includes a reverse-pushing connecting pipe for sleeving on the stirring shaft, a first reverse-pushing blade and a second reverse-pushing blade correspondingly installed on the reverse-pushing connecting pipe; the included angles b between the first reverse-pushing blade, the second reverse-pushing blade and the vertical plane are all acute angles.

3. A conical powder mixing device according to claim 1, characterized in that: One positive-pushing stirring paddle and one reverse-pushing stirring paddle are provided respectively.

4. A conical powder mixing device according to claim 1, characterized in that: Three positive-pushing stirring paddles and three reverse-pushing stirring paddles are provided respectively. The three positive-pushing stirring paddles are respectively a left positive-pushing stirring paddle, a middle positive-pushing stirring paddle, and a right positive-pushing stirring paddle; the three reverse-pushing stirring paddles are respectively a left reverse-pushing stirring paddle, a middle reverse-pushing stirring paddle, and a right reverse-pushing stirring paddle; During the clockwise stirring process, the left positive-pushing stirring paddle pushes the material towards the middle positive-pushing stirring paddle, and the middle positive-pushing stirring paddle pushes the material towards the right positive-pushing stirring paddle; the right reverse-pushing stirring paddle pushes the material towards the middle reverse-pushing stirring paddle, and the middle reverse-pushing stirring paddle pushes towards the left reverse-pushing stirring paddle.

5. A conical powder mixing device according to claim 4, characterized in that: The material barrel adopts a conical material barrel, and the diameters of both ends of the conical material barrel are smaller than the middle diameter.

6. The conical powder mixing device according to claim 4, wherein: The stirring diameters of the right ends of the middle positive-pushing stirring paddle and the right positive-pushing stirring paddle are larger than those of their left ends; [[ID= 7. A conical powder mixing device according to claim 1, characterized in that: ​ 8. A conical powder mixing device according to claim 1, characterized in that: ​ 9. A conical powder mixing device according to claim 8, characterized in that: ​ A dry gas sealing seat fixedly mounted on the upper end of the bearing seat, and a cover plate covering the right end surface of the dry gas sealing seat; The first sealed cavity is formed by the stirring shaft, the dry gas sealing seat and the cover plate; a second sealed cavity, provided between the cover plate and the left bearing; An air inlet hole is provided on the bearing seat and the dry gas sealing seat, one end of the air inlet hole is connected to the first sealing cavity, and the other end is connected to the external air source gas circuit; an air outlet, provided on the bearing seat and connected to the air path of the second sealing cavity; And the first push ring, the first static ring, the dynamic ring, the second static ring and the second push ring are arranged in the first sealing cavity from right to left; the first push ring, the first static ring, the dynamic ring, the second static ring and the second push ring are all sleeved on the stirring shaft; the dynamic ring rotates with the stirring shaft, and the first static ring and the second static ring are loosely matched with the stirring shaft.

10. The method of using a conical powder mixing device according to claim 9, characterized in that: Includes the following: Add materials into the conical barrel according to the ratio; Select a stirring mode according to stirring requirements; the stirring modes include clockwise stirring mode, counterclockwise stirring mode, and clockwise / counterclockwise alternating mode; Starting an external air source to inflate the sealing component; According to the selected stirring mode, the driving component is controlled to run forward and reverse, that is, the material is stirred in an internal circulation toward the center, or dispersed in an external circulation toward both ends, or stirred in an internal / external circulation alternating manner; After the stirring is completed, first stop the external air source to inflate the sealing component, and then stop the driving component.

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