Material mixing equipment

Abstract

The utility model relates to the technical field of lithium ion battery positive electrode material preparation, and discloses mixing equipment which comprises a mixing tank, a sieve plate grinding ball is arranged in the mixing tank, the sieve plate is used for separating materials and the grinding ball when the mixing tank stops rotating, the grinding ball is used for mixing and grinding various materials in the mixing tank, and the mixing equipment further comprises a driving unit, the sieve plate is rotatably arranged in the mixing tank, the driving unit drives the sieve plate to rotate, the aperture of sieve pores of the sieve plate is smaller than the diameter of a grinding ball, and the maximum distance between the side wall of the sieve plate and the mixing tank is smaller than the diameter of the grinding ball. By means of the design, grinding balls and materials can be rapidly separated after mixing of the material mixing equipment, the material mixing and grinding efficiency of the material mixing equipment is improved to a certain degree due to rotation of the sieve plate, and the particle size uniformity degree of the ground materials is increased due to the fact that the rotating sieve plate has a certain stirring effect.

Description

Technical Field

[0001] The present application relates to the technical field of lithium-ion battery positive electrode material preparation, and in particular to a mixing device. Background Art

[0002] There are many types of mixing equipment for lithium-ion positive electrode materials, including oblique mixers, double-screw cone mixers, high-speed mixers, etc. Among them, double-screw cone mixers and high-speed mixers have the advantages of high mixing degree and mixing effect, but they are inconvenient to clean and not conducive to production conversion. The mixing degree of the oblique mixer is low, and grinding media balls of different materials are usually added to increase the mixing effect. Conventional mixing equipment will add a vibrating screen device to separate the media balls, and the media balls need to be added again for the next feeding, which invisibly increases the investment cost and labor cost.

[0003] Chinese patent application 202020578065.5 discloses an inclined drum mixer, including a mixing cylinder, a rotating shaft, a bracket, and a driving device. At least one spherical mixing tank is placed in the mixing cylinder. The spherical mixing tank includes a spherical shell with a hollow interior, an opening is provided on the spherical shell, and an openable and closable cover is installed on the opening.

[0004] This solution adds a hollowed-out spherical mixing tank inside the mixing cylinder. Each spherical mixing tank has a detachable lid, and the mixture can be placed inside the spherical mixing tank. The spherical mixing tank and the mixing cylinder are independent units, which allows the mixture to be subjected to its own gravity and the force of the spherical mixing tanks colliding with each other during rotation, as well as the dual mechanical forces of the spherical mixing tank's rotation and the mixing cylinder's revolution, a total of four forces, which enhances the mixing effect, shortens the mixing time, and improves efficiency; but it should be noted that the above solution does not make too many designs for the rapid separation of the grinding balls and the materials.

[0005] Chinese patent application 202122787430.0 discloses a high-gram-specific capacity lithium-manganese-rich composite positive electrode material ball mill mixer, including a base plate, a mixing tank and a hydraulic cylinder are installed on the top outer wall of the base plate by bolts, and a top cover is inserted on the top outer wall of the mixing tank, a connecting plate is integrally formed on the outer wall of one side of the top cover, and the top end of the hydraulic cylinder is installed on the bottom outer wall of the connecting plate by bolts, a mixing shell is installed on the bottom outer wall of the top cover by bolts, and the mixing shell is inserted into the interior of the mixing tank, the interior of the mixing shell is filled with grinding balls, and a sieve plate is welded on the bottom outer wall of the mixing shell, a plurality of feeding holes are opened on the bottom outer wall of the sieve plate, and a transmission box is installed on the top outer wall of the top cover by bolts.

[0006] And by observing the instructions, it can be seen that "after the mixing is completed, the output end of the hydraulic cylinder extends out, thereby driving the connecting plate to move upward, the connecting plate moves upward and thereby drives the top cover to move upward, the top cover moves upward and thereby drives the mixing shell upward, and then the mixing shell is pulled out from the interior of the mixing tank"; since the grinding balls are arranged in the mixing shell, when the mixing shell is pulled out, the grinding balls are automatically pulled out as well, and since a screen plate is provided under the mixing shell, it is ensured that the material will not be pulled out with the mixing shell.

[0007] The technical problem to be solved by the present application is: how to provide a mixing device with a different structure from the prior art, which can quickly separate the grinding balls and materials while further improving the grinding efficiency. Utility Model Content

[0008] The main purpose of the present application is to provide a mixing device, which realizes the rapid separation of grinding balls and materials during the discharging process by means of a detachable sieve plate arranged in a mixing tank. At the same time, the operation of the mixing device is simple. When mixing materials with smaller mass or lower hardness, there is no need to remove the sieve plate. Compared with the existing mixing equipment for separating grinding balls and materials, the operation steps are simpler and the structure is simpler.

[0009] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: a mixing device, comprising a mixing tank, wherein a sieve plate and grinding balls are arranged in the mixing tank, wherein the sieve plate is used to separate materials and grinding balls when the mixing tank stops rotating, wherein the grinding balls are used to mix and grind a variety of materials in the mixing tank, and further comprising a driving unit, wherein the sieve plate is rotatably arranged in the mixing tank, and wherein the driving unit drives the sieve plate to rotate;

[0010] The sieve hole diameter of the sieve plate is smaller than the diameter of the grinding ball;

[0011] The maximum distance between the side wall of the sieve plate and the mixing tank is smaller than the diameter of the grinding balls.

[0012] Preferably, the mixing tank is provided with a feed inlet and a discharge port, the feed inlet and the discharge port are respectively arranged on both sides of the sieve plate, and the feed inlet and the discharge port are openable and closable feed inlets and discharge ports;

[0013] The diameter of the feed port is greater than the diameter of the grinding balls.

[0014] Preferably, the feed inlet is provided with a first valve, and the discharge outlet is provided with a second valve;

[0015] When adding grinding balls or materials, open the first valve and close the second valve;

[0016] When the mixing tank rotates, close the first valve and the second valve;

[0017] When the material is taken out, the second valve is opened.

[0018] Preferably, it further comprises a first support frame, both ends of the mixing tank are connected to the first support frame, the driving unit is a motor, and the motor drives the sieve plate to rotate with the connection between the mixing tank and the first support frame as the axis.

[0019] Preferably, it also includes a feeding bin and a second support frame, wherein the feeding bin is arranged on the second support frame, and the output end of the feeding bin is detachably connected to the feed port.

[0020] Preferably, the feeding bin is connected to the feed port via a pipeline, one end of the pipeline is connected to the output end of the feeding bin, and the other end is detachably connected to the feed port.

[0021] Preferably, the diameter of the grinding ball is 15-40 mm, the difference between the diameter of the grinding ball and the aperture of the sieve plate is 5 mm, and the diameter of the feed port is 400-600 mm.

[0022] One of the above technical solutions of the present application has at least one of the following advantages or beneficial effects:

[0023] The mixing equipment provided in the present application realizes the rapid separation of the grinding balls and the materials during the discharging process by means of a detachable sieve plate arranged in the mixing tank. At the same time, the operation of the mixing equipment is simple. When mixing materials with smaller mass or lower hardness, there is no need to remove the sieve plate. Compared with the existing mixing equipment for separating grinding balls and materials, the operation steps are simpler and the structure is simpler. At the same time, since the present application controls the rotation of the sieve plate, it can drive the grinding balls and the materials in the mixing tank to rotate together, thereby increasing the number of collisions between the grinding balls and between the grinding balls and the materials, thereby improving the grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of a mixing device;

[0025] Figure 2 It is a top view of the sieve plate;

[0026] Figure 3 This is a cross-sectional view of the mixing equipment feeding process. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. The components of the present application implemented as described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Example 1

[0029] refer to Figure 1-3 , a mixing device, comprising a mixing tank 1, wherein a sieve plate 2 and grinding balls 3 are arranged in the mixing tank 1, wherein the sieve plate 2 is used to separate materials and the grinding balls 3 when the mixing tank 1 stops rotating, wherein the grinding balls 3 are used to mix and grind a variety of materials in the mixing tank 1, and further comprising a driving unit, wherein the sieve plate 2 is rotatably arranged in the mixing tank 1, and wherein the driving unit drives the sieve plate 2 to rotate;

[0030] The sieve hole diameter of the sieve plate 2 is smaller than the diameter of the grinding ball 3;

[0031] The maximum distance between the side wall of the sieve plate 2 and the mixing tank 1 is smaller than the diameter of the grinding balls 3 .

[0032] As a conventional technical means in this field, the mixing tank 1 is provided with a feed port 4 and a discharge port 5, and the feed port 4 and the discharge port 5 are respectively arranged on both sides of the sieve plate 2, and the feed port 4 and the discharge port 5 are openable and closable feed ports 4 and discharge ports 5;

[0033] The diameter of the feed port 4 is larger than the diameter of the grinding balls 3 .

[0034] In actual use, the above mixing equipment mainly includes the following steps:

[0035] Step 1: Install the sieve plate 2, open the feed port 4, and put the grinding balls 3 and materials into the storage tank;

[0036] Step 2: Close the feed port 4 and turn on the drive unit to drive the sieve plate 2 to rotate;

[0037] Step 3: After the materials are mixed, the discharge port 5 is rotated to the lowest position, the discharge port 5 is opened, the materials flow out from the discharge port 5, and the grinding balls 3 are blocked by the sieve plate 2 and remain in the mixing tank 1;

[0038] Step 4: After all the materials have flowed out, close the discharge port 5, open the feed port 4, rotate the feed port 4 to the lowest position, and take out the grinding balls 3.

[0039] Through the above design, the grinding balls 3 and the materials are quickly separated during the discharging process, and the structure is simple and easy to operate. At the same time, since the grinding balls 3 and the materials are driven to rotate together by the rotation of the sieve plate 2 in the present application, in the actual working process, the sieve plate 2 also plays a certain stirring role to a certain extent, further increasing the number of collisions between the grinding balls 3 and the materials. On the one hand, this enables the materials to be ground to a specific particle size more quickly. On the other hand, due to the stirring effect of the sieve plate 2, the uniformity of the ground materials is improved to a certain extent.

[0040] Preferably, it further comprises a first support frame 8, both ends of the mixing tank 1 are connected to the first support frame 8, the driving unit is a motor 9, and the motor 9 drives the sieve plate 2 to rotate around the connection between the mixing tank 1 and the first support frame 8 as the axis.

[0041] Meanwhile, as a more specific implementation of this embodiment, the feed port 4 is provided with a first valve 6, and the discharge port 5 is provided with a second valve 7;

[0042] When adding grinding balls 3 or materials, the first valve 6 is opened and the second valve 7 is closed; at this time, the grinding balls 3 and the materials are sequentially put into the mixing tank 1 through the feed port 4, and then the driving unit is turned on to drive the sieve plate 2 to rotate and mix and grind;

[0043] When the screen plate 2 rotates, in order to prevent the material or the grinding balls 3 from flowing out of the mixing tank 1, the first valve 6 and the second valve 7 need to be closed;

[0044] When the mixing is completed, the second valve 7 is opened to take out the material, and the grinding balls 3 are blocked by the sieve plate 2 in the mixing tank 1, thereby quickly separating the grinding balls 3 and the material.

[0045] As a conventional technical means in this field, it also includes a first support frame 8, both ends of the mixing tank 1 are connected to the first support frame 8, and the driving unit is a motor 9. The motor 9 drives the sieve plate 2 to rotate with the connection between the mixing tank 1 and the first support frame 8 as the axis; the reason why the motor 9 is selected as the driving unit in this embodiment is that the rotation speed of the motor 9 is easy to control, and when mixing different materials, the difficulty of mixing is different due to the influence of the hardness and other properties of the material itself. Therefore, when mixing is difficult, using the motor 9 to drive is convenient to speed up the rotation of the sieve plate 2, thereby promoting mixing and shortening the mixing time.

[0046] At the same time, considering that some materials are already particles or powders with smaller particle sizes before being put into the mixing tank 1, in order to facilitate the feeding into the mixing tank 1, the present embodiment also includes a feeding bin 10 and a second support frame 11, wherein the feeding bin 10 is arranged on the second support frame 11, and the output end of the feeding bin 10 is detachably connected to the feed port 4.

[0047] More specifically, the feeding bin 10 is connected to the feed port 4 by a pipe 12, one end of the pipe 12 is connected to the output end of the feeding bin 10, and the other end is detachably connected to the feed port 4; of course, the above-mentioned pipe 12 can be a rubber pipe 12 with a softer material, or it can be a metal or alloy pipe 12 with a higher hardness. For the selection of the material of the pipe 12, it is necessary to consider the properties of the input material. If the material is a material that is easy to agglomerate, a rubber pipe 12 can be selected to facilitate clearing the blockage. If the material is a material with a higher hardness and has edges and corners, in order to prevent the pipe 12 from being damaged, it is recommended to use a pipe 12 made of metal or alloy material.

[0048] This embodiment is mainly used for mixing positive electrode materials for lithium-ion batteries, and the parameters mentioned below are more suitable for mixing positive electrode materials for lithium-ion batteries; if there is a large discrepancy between the particle size of the material and the particle size of the grinding ball 3, the operator can also select grinding balls 3 of other diameters, feed ports 4 and sieve plates 2 of other apertures. The diameter of the grinding balls 3 is 15-40 mm, and the difference between the diameter of the grinding balls 3 and the aperture of the sieve plate 2 is 5 mm. The diameter of the feed port 4 is 400-600 mm. However, it should be noted that the diameter of the feed port 4 needs to be larger than the diameter of the grinding balls 3, and the aperture of the sieve plate 2 needs to be smaller than the diameter of the grinding balls 3.

[0049] In summary, the mixing equipment provided in the present application realizes the rapid separation of grinding balls and materials during the discharging process by means of a detachable sieve plate arranged in a mixing tank. At the same time, the operation of the mixing equipment is simple. When mixing materials with smaller mass or lower hardness, there is no need to remove the sieve plate. Compared with the existing mixing equipment for separating grinding balls and materials, the operation steps are simpler and the structure is simpler.

[0050] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A mixing device, comprising a mixing tank, wherein a sieve plate and grinding balls are arranged in the mixing tank, wherein the sieve plate is used to separate materials and grinding balls when the mixing tank stops rotating, and the grinding balls are used to mix and grind a variety of materials in the mixing tank, characterized in that: It also includes a driving unit, the sieve plate is rotatably arranged in the mixing tank, and the driving unit drives the sieve plate to rotate; The sieve hole diameter of the sieve plate is smaller than the diameter of the grinding ball; The maximum distance between the side wall of the sieve plate and the mixing tank is smaller than the diameter of the grinding balls.

2. The mixing device according to claim 1, characterized in that: The mixing tank is provided with a feed inlet and a discharge port, the feed inlet and the discharge port are respectively arranged on both sides of the sieve plate, and the feed inlet and the discharge port are openable and closable; The diameter of the feed port is greater than the diameter of the grinding balls.

3. The mixing device according to claim 2, characterized in that: The feed inlet is provided with a first valve, and the discharge outlet is provided with a second valve; When adding grinding balls or materials, open the first valve and close the second valve; When the mixing tank rotates, close the first valve and the second valve; When the material is taken out, the second valve is opened.

4. The mixing device according to claim 1, characterized in that: It also includes a first support frame, both ends of the mixing tank are connected to the first support frame, the driving unit is a motor, and the motor drives the sieve plate to rotate with the connection between the mixing tank and the first support frame as the axis.

5. The mixing device according to claim 2, characterized in that: It also includes a feeding bin and a second support frame, wherein the feeding bin is arranged on the second support frame, and the output end of the feeding bin is detachably connected to the feeding port.

6. The mixing device according to claim 5, characterized in that The feeding bin is connected to the feeding port via a pipeline, one end of the pipeline is connected to the output end of the feeding bin, and the other end is detachably connected to the feeding port.

7. The mixing device according to claim 2, characterized in that: The diameter of the grinding ball is 15-40 mm, and the difference between the diameter of the grinding ball and the aperture of the sieve plate is 5 mm. The diameter of the feed port is 400-600 mm.

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