Efficient mixing device for processing composite lithium iron phosphate

Abstract

The utility model discloses a high -efficient mixing device for composite lithium iron phosphate processing belongs to lithium iron phosphate processing technical field, including base, the top of base is along length direction and is opened with the sliding slot, the inside of sliding slot is slidably provided with slide, both ends of slide top are all fixed with the thimble, the inside rotation of thimble is installed with the stirring drum. The utility model discloses a reciprocating mechanism that drive motor, reciprocating screw rod, sliding block and guide slot constitute, can drive stirring drum to realize linear reciprocating motion, cooperate the rotating mechanism that second shaft sleeve, second spline shaft, gear, gear ring and shroud constitute, can control stirring drum and stirring shaft form reverse rotation, two kinds of mechanism synergistic effect, make raw materials in stirring chamber not only axial movement, can produce radial cross -collision and axial reciprocating penetration contact more, break the fixed track of traditional horizontal stirrer one -way push thoroughly, effectively eliminate local mixed dead angle, improve stirring rate and the mixing uniformity of each component greatly, avoid the problem such as powder agglomeration, stratification.

Description

Technical Field

[0001] This utility model relates to a high-efficiency mixing device, and in particular to a high-efficiency mixing device for the processing of compound lithium iron phosphate, belonging to the field of lithium iron phosphate processing technology. Background Technology

[0002] Lithium iron phosphate (LiFePO4 / C) composites have been widely used in power batteries, energy storage devices, and other fields due to their high safety, long cycle life, and excellent electrochemical performance. Dry mixing is a crucial step in their preparation, requiring the uniform dispersion of active powders (including lithium iron phosphate precursors, lithium sources, iron sources, phosphorus sources, etc.) with carbon sources (such as graphite, carbon black, and organic carbon sources) and modifiers (such as nano-conductive agents and structural additives). The mixing effect directly affects the reaction uniformity of each component during subsequent sintering, thus significantly influencing the electrical and mechanical properties of the final product.

[0003] Currently, horizontal mixers are commonly used in the dry mixing process of compound lithium iron phosphate in the industry. Existing horizontal mixers mainly rely on the rotation of the mixing shaft to drive the movement of helical blades. The helical blades, as the core mixing component, primarily push the raw materials within the mixing chamber to achieve mixing. However, the mixing shaft of existing horizontal mixers can only drive the helical blades to rotate in one direction. This results in the raw materials mainly undergoing unidirectional pushing motion along the axial direction within the mixing chamber. The movement trajectory is relatively fixed and singular, making it difficult to achieve sufficient radial cross-collision and axial reciprocating penetration contact. This easily leads to localized mixing dead zones, causing problems such as powder agglomeration and stratification, thus affecting the mixing efficiency.

[0004] To address these issues, a high-efficiency mixing device was designed for the processing of compound lithium iron phosphate. Utility Model Content

[0005] The main objective of this invention is to provide a high-efficiency mixing device for the processing of compound lithium iron phosphate, in order to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved by adopting the following technical solution:

[0007] A high-efficiency mixing device for processing compound lithium iron phosphate includes a base, a groove is provided on the top of the base along the length direction, a slide plate is slidably arranged inside the groove, and a collar is fixed at both ends of the top of the slide plate. A stirring cylinder is rotatably installed inside the collar, and a reciprocating mechanism is provided inside the base to control the reciprocating motion of the slide plate.

[0008] A stirring shaft is rotatably mounted inside the stirring drum, and a drive mechanism for controlling the rotation of the stirring shaft is provided at the top of the base and at the outer end of the stirring drum.

[0009] The outside of the stirring drum is equipped with a rotating mechanism for driving it to rotate in the opposite direction to the stirring shaft.

[0010] Preferably, the reciprocating mechanism includes a drive motor, a reciprocating lead screw, a slider, and a guide groove. The drive motor is installed at the end of the base, and the output end of the drive motor is equipped with a reciprocating lead screw via a coupling. A slider is slidably mounted on the reciprocating lead screw. A guide groove is provided at the middle position of the bottom of the slide groove, and the slider is located inside the guide groove. The top of the slider is fixedly connected to the slide plate.

[0011] Preferably, the drive mechanism includes an end plate, a first bushing, a first splined shaft, and a first pulley assembly. The end plate is vertically fixed to the end of the base. The first bushing is rotatably installed inside the end plate. The first splined shaft is linearly slidably installed inside the first bushing. The end of the first splined shaft is fixedly connected to the end of the stirring shaft. The first pulley assembly is provided between the end of the first bushing and the end of the reciprocating lead screw.

[0012] Preferably, the rotating mechanism includes a second bushing, a second splined shaft, a gear, a gear ring, a protective cover, and a second pulley assembly. The second bushing is rotatably mounted on the top of the end plate. The second splined shaft is linearly slidably arranged inside the second bushing. A gear is installed at the end of the second splined shaft. A gear ring that meshes with the gear is fixed at the end of the stirring cylinder. A protective cover is provided on the outside of the gear ring. The protective cover is rotatably connected to the stirring cylinder. The second splined shaft extends into the interior of the protective cover and is rotatably connected to the protective cover. A second pulley assembly is provided between the end of the second bushing and the end of the first bushing.

[0013] Preferably, a number of balls are embedded on the contact surface between the bottom of the slider and the guide groove. The balls are evenly distributed along the length of the guide groove, and the outer wall of the balls rolls and fits against the inner wall of the guide groove.

[0014] Preferably, the protective cover is made of stainless steel and has an observation window on one side.

[0015] Preferably, rubber pads are fixed at the four corners of the base, and the bottom of the rubber pads is provided with anti-slip texture.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. Significantly improves mixing uniformity and efficiency. The reciprocating mechanism, consisting of a drive motor, reciprocating screw, slider, and guide groove, drives the mixing drum to achieve linear reciprocating motion. In conjunction with the rotating mechanism, consisting of a second bushing, second splined shaft, gear, gear ring, and protective cover, it can control the mixing drum and the mixing shaft to rotate in opposite directions. The two mechanisms work together to ensure that the raw materials not only move axially in the mixing chamber, but also generate radial cross collisions and axial reciprocating penetration contact. This completely breaks the fixed trajectory of the unidirectional push of the traditional horizontal mixer, effectively eliminates local mixing dead zones, greatly improves the mixing rate and the mixing uniformity of each component, and avoids problems such as powder agglomeration and stratification.

[0018] 2. Energy saving and consumption reduction, reducing processing costs: The belt pulley assembly is used for transmission, and a single drive motor provides power to the entire device. No additional power source is required. While ensuring efficient mixing, energy consumption is significantly reduced, achieving energy-saving operation. This reduces the cost input in the compound lithium iron phosphate processing process and is more suitable for industrial production needs. Attached Figure Description

[0019] Figure 1 This is a front sectional view of the present invention;

[0020] Figure 2 This is the front view of the present invention;

[0021] Figure 3 This is a structural diagram of the belt pulley transmission of this utility model;

[0022] Figure 4 This is a structural diagram of the gear ring transmission of this utility model.

[0023] In the diagram: 1. Base; 2. Slide; 3. Slide plate; 4. Ring; 5. Mixing drum;

[0024] 6. Reciprocating mechanism; 601. Drive motor; 602. Reciprocating lead screw; 603. Slider; 604. Guide groove;

[0025] 7. Stirring shaft;

[0026] 8. Drive mechanism; 801. End plate; 802. First bushing; 803. First splined shaft; 804. First pulley assembly;

[0027] 9. Rotating mechanism; 901. Second bushing; 902. Second splined shaft; 903. Gear; 904. Gear ring; 905. Protective cover; 906. Second pulley assembly. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0029] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0030] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Example 1

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment proposes a high-efficiency mixing device for the processing of compound lithium iron phosphate, including a base 1. A groove 2 is provided on the top of the base 1 along the length direction. A slide plate 3 is slidably arranged inside the groove 2. Both ends of the top of the slide plate 3 are fixed with collars 4. A stirring cylinder 5 is rotatably installed inside the collars 4. A reciprocating mechanism 6 is provided inside the base 1 to control the reciprocating motion of the slide plate 3.

[0035] A stirring shaft 7 is rotatably mounted inside the stirring drum 5, and a drive mechanism 8 for controlling the rotation of the stirring shaft 7 is provided on the top of the base 1 and at the outer end of the stirring drum 5.

[0036] The outer side of the stirring drum 5 is provided with a rotating mechanism 9 for driving it to rotate in the opposite direction to the stirring shaft 7.

[0037] When the device is in use, the base 1 provides support for the overall structure, and the slide groove 2 on its top guides the sliding of the slide plate 3. The slide plate 3 supports the mixing drum 5 through the collar 4, allowing the mixing drum 5 to rotate freely within the collar 4. The reciprocating mechanism 6 drives the slide plate 3 to make linear reciprocating motion along the slide groove 2, causing the mixing drum 5 to move synchronously back and forth, changing the axial position of the raw material within the mixing drum 5. The drive mechanism 8 drives the stirring shaft 7 to rotate inside the mixing drum 5, and the stirring components on the stirring shaft 7 shear and push the raw material. The rotating mechanism 9 drives the mixing drum 5 to rotate around its own axis, and the direction of rotation is opposite to that of the stirring shaft 7. The superposition of these three motions causes the raw material to be simultaneously subjected to axial pushing, radial shearing, and reverse circulation driven by the drum wall within the mixing drum 5, breaking the single motion trajectory, reducing mixing dead zones, and improving mixing uniformity.

[0038] Example 2

[0039] The solution in Example 1 will be further described below with reference to its specific working method.

[0040] like Figure 1 As shown, in a preferred embodiment, based on the above method, the reciprocating mechanism 6 further includes a drive motor 601, a reciprocating lead screw 602, a slider 603, and a guide groove 604. The drive motor 601 is installed at the end of the base 1. The output end of the drive motor 601 is connected to the reciprocating lead screw 602 via a coupling. The slider 603 is slidably arranged on the reciprocating lead screw 602. The guide groove 604 is opened at the middle position of the bottom of the slide groove 2. The slider 603 is located inside the guide groove 604, and the top of the slider 603 is fixedly connected to the slide plate 3.

[0041] After the drive motor 601 starts, its output end drives the reciprocating screw 602 to rotate through the coupling. The reciprocating screw 602 is threadedly engaged with the slider 603. Since the slider 603 is limited by the guide groove 604 and cannot rotate, the rotation of the reciprocating screw 602 is converted into the linear reciprocating motion of the slider 603 along the guide groove 604. The top of the slider 603 is fixed to the slide plate 3, thus driving the slide plate 3 and the collar 4 and stirring cylinder 5 on the slide plate 3 to reciprocate synchronously along the slide groove 2.

[0042] like Figure 1 and Figure 3 As shown, in a preferred embodiment, based on the above method, the drive mechanism 8 further includes an end plate 801, a first bushing 802, a first spline shaft 803, and a first pulley assembly 804. The end plate 801 is vertically fixed to the end of the base 1. The first bushing 802 is rotatably installed inside the end plate 801. The first spline shaft 803 is linearly slidably arranged inside the first bushing 802. The end of the first spline shaft 803 is fixedly connected to the end of the stirring shaft 7. The first pulley assembly 804 is provided between the end of the first bushing 802 and the end of the reciprocating lead screw 602.

[0043] The end plate 801 provides rotational support for the first bushing 802. When the drive motor 601 drives the reciprocating screw 602 to rotate, the reciprocating screw 602 transmits power to the first bushing 802 through the first pulley assembly 804, causing the first bushing 802 to rotate synchronously. The first spline shaft 803 inside the first bushing 802 rotates with the first bushing 802 (the spline structure transmits torque). At the same time, because the slide plate 3 drives the stirring drum 5 to reciprocate, the first spline shaft 803 can slide axially along the inside of the first bushing 802 (adapting to position changes), ultimately driving the stirring shaft 7 to rotate inside the stirring drum 5, thereby realizing the stirring and pushing of the raw materials.

[0044] like Figure 1 and Figure 4 As shown, in a preferred embodiment, based on the above method, the rotating mechanism 9 further includes a second bushing 901, a second splined shaft 902, a gear 903, a gear ring 904, a protective cover 905, and a second pulley assembly 906. The second bushing 901 is rotatably mounted on the top of the end plate 801. The second splined shaft 902 is linearly slidably disposed inside the second bushing 901. The gear 903 is installed at the end of the second splined shaft 902. The end of the stirring cylinder 5 is fixed with a gear ring 904 that meshes with the gear 903. A protective cover 905 is provided on the outside of the gear ring 904. The protective cover 905 is rotatably connected to the stirring cylinder 5. The second splined shaft 902 extends into the interior of the protective cover 905 and is rotatably connected to the protective cover 905. A second pulley assembly 906 is provided between the end of the second bushing 901 and the end of the first bushing 802.

[0045] When the first bushing 802 rotates, power is transmitted to the second bushing 901 through the second pulley assembly 906, causing the second bushing 901 to rotate. The second spline shaft 902 inside the second bushing 901 rotates with it (the spline structure transmits torque) and can slide along the axial direction of the second bushing 901 (to accommodate the reciprocating motion of the slide plate 3). The gear 903 at the end of the second spline shaft 902 meshes with the gear ring 904 at the end of the stirring drum 5. Therefore, the rotation of the gear 903 drives the gear ring 904 and the stirring drum 5 to rotate around their own axis. Due to the transmission direction design of the second pulley assembly 906, the rotation direction of the stirring drum 5 is opposite to that of the stirring shaft 7.

[0046] like Figure 1 As shown, in a preferred embodiment, based on the above method, a plurality of balls are embedded on the contact surface between the bottom of the slider 603 and the guide groove 604. The balls are evenly distributed along the length of the guide groove 604, and the outer wall of the balls rolls against the inner wall of the guide groove 604. The rolling contact between the balls at the bottom of the slider 603 and the inner wall of the guide groove 604 can reduce sliding friction and improve the stability of reciprocating motion.

[0047] like Figure 1 and Figure 2 As shown, in a preferred embodiment, based on the above method, the protective cover 905 is made of stainless steel, and an observation window is provided on one side of the protective cover 905. The observation window on the outside of the protective cover 905 facilitates the observation of the transmission.

[0048] like Figure 1 As shown, in a preferred embodiment, based on the above method, rubber pads are fixed at the four corners of the bottom of the base 1, and the bottom of the rubber pads is provided with anti-slip texture. The rubber pads enhance the stability of the device through the anti-slip texture and reduce vibration displacement during operation.

[0049] Example 3

[0050] The solutions in Embodiments 1 and 2 will be further described below with reference to their specific working methods.

[0051] The entire device is stably placed by the rubber pad at the bottom of the base 1 to ensure no sliding displacement during operation. The composite lithium iron phosphate raw materials to be mixed (including active powder, carbon source, modifier, etc.) are added into the mixing drum 5. The feed port of the mixing drum 5 is closed to complete the preparation before mixing. The drive motor 601 in the reciprocating mechanism 6 is started. The output end of the drive motor 601 drives the reciprocating screw 602 to rotate through the coupling. As the core power source of the entire device, its power will be distributed to the three actions of reciprocating motion, rotation of the stirring shaft 7 and reverse rotation of the mixing drum 5 through different transmission paths.

[0052] When the reciprocating screw 602 rotates, the slider 603, which is threadedly engaged with the reciprocating screw 602, is limited by the guide groove 604 and is converted into a linear reciprocating motion along the guide groove 604. The top of the slider 603 is fixed to the slide plate 3, thus driving the slide plate 3 to reciprocate synchronously along the slide groove 2 of the base 1. The slide plate 3 drives the mixing drum 5 to make axial reciprocating motion through the collars 4 at both ends, so that the raw material will move axially in the mixing drum 5, breaking the single pushing trajectory.

[0053] While the reciprocating screw 602 rotates, the power is transmitted to the first bushing 802 of the drive mechanism 8 through the first pulley assembly 804, causing the first bushing 802 to rotate synchronously. The first spline shaft 803 inside the first bushing 802 rotates with it due to the spline structure (transmitting torque). At the same time, because the stirring drum 5 reciprocates with the slide plate 3, the first spline shaft 803 can slide along the axial direction of the first bushing 802 (adapting to position changes), which ultimately drives the stirring shaft 7 inside the stirring drum 5 to rotate. The stirring components on the stirring shaft 7 shear and push the raw materials to achieve preliminary mixing.

[0054] When the first bushing 802 rotates, the power is transmitted to the second bushing 901 of the rotating mechanism 9 through the second pulley assembly 906, causing the second bushing 901 to rotate. The second spline shaft 902 inside the second bushing 901 rotates with it due to its spline structure (transmitting torque), and can slide along the axial direction of the second bushing 901 (adapting to the reciprocating motion of the stirring drum 5). The gear 903 at the end of the second spline shaft 902 meshes with the gear ring 904 at the end of the stirring drum 5, causing the gear ring 904 and the stirring drum 5 to rotate around their own axis. Due to the transmission direction design of the second pulley assembly 906, the rotation direction of the stirring drum 5 is completely opposite to that of the stirring shaft 7, so that the raw material in the stirring drum 5 is simultaneously subjected to the positive shearing of the stirring shaft 7 and the reverse circulation of the stirring drum 5, forming a radial cross collision.

[0055] The axial reciprocating motion of the mixing drum 5, the forward rotation of the mixing shaft 7, and the reverse rotation of the mixing drum 5 work together. When the mixing shaft 7 rotates clockwise at 2000 rpm and the mixing drum 5 rotates counterclockwise at 500 rpm, and the mixing drum 5 reciprocates at a frequency of 50 times / minute, the raw material forms a spiral propulsion flow along the axial direction of the mixing shaft 7 under the action of centrifugal force and friction force of the drum wall. At the same time, the reverse rotation of the mixing drum 5 generates a reverse circulation. The two flow fields intersect to form turbulence, achieving radial collision. The reciprocating motion makes the raw material shuttle repeatedly in the axial direction, eliminating the "pushing blind zone". Ultimately, it breaks the single motion trajectory of the traditional horizontal mixer, avoids powder agglomeration and stratification, achieves uniform dispersion of raw materials, and greatly improves mixing efficiency and uniformity.

[0056] After the mixing process is completed, the drive motor 601 is turned off, all moving parts gradually stop, the discharge port of the mixing drum 5 is opened, the mixed raw materials are discharged, and one mixing operation is completed.

[0057] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A high-efficiency mixing device for processing compound lithium iron phosphate, comprising a base (1), characterized in that: The top of the base (1) is provided with a groove (2) along the length direction. A slide plate (3) is slidably arranged inside the groove (2). Both ends of the top of the slide plate (3) are fixed with collars (4). A stirring cylinder (5) is rotatably installed inside the collar (4). The base (1) is provided with a reciprocating mechanism (6) to control the reciprocating motion of the slide plate (3). A stirring shaft (7) is rotatably mounted inside the stirring drum (5), and a drive mechanism (8) for controlling the rotation of the stirring shaft (7) is provided on the top of the base (1) and at the outer end of the stirring drum (5); The outside of the stirring drum (5) is provided with a rotating mechanism (9) for driving it to rotate in the opposite direction to the stirring shaft (7).

2. The high-efficiency mixing device for processing compound lithium iron phosphate according to claim 1, characterized in that: The reciprocating mechanism (6) includes a drive motor (601), a reciprocating lead screw (602), a slider (603), and a guide groove (604). The drive motor (601) is installed at the end of the base (1). The output end of the drive motor (601) is connected to the reciprocating lead screw (602) via a coupling. The slider (603) is slidably mounted on the reciprocating lead screw (602). The guide groove (604) is provided at the middle position of the bottom of the slide groove (2). The slider (603) is located inside the guide groove (604), and the top of the slider (603) is fixedly connected to the slide plate (3).

3. The high-efficiency mixing device for processing compound lithium iron phosphate according to claim 2, characterized in that: The drive mechanism (8) includes an end plate (801), a first bushing (802), a first spline shaft (803), and a first pulley assembly (804). The end plate (801) is vertically fixed to the end of the base (1). The first bushing (802) is rotatably installed inside the end plate (801). The first spline shaft (803) is linearly slidably installed inside the first bushing (802). The end of the first spline shaft (803) is fixedly connected to the end of the stirring shaft (7). The first pulley assembly (804) is provided between the end of the first bushing (802) and the end of the reciprocating screw (602).

4. The high-efficiency mixing device for processing compound lithium iron phosphate according to claim 3, characterized in that: The rotating mechanism (9) includes a second bushing (901), a second splined shaft (902), a gear (903), a gear ring (904), a protective cover (905), and a second pulley assembly (906). The second bushing (901) is rotatably mounted on the top of the end plate (801). The second splined shaft (902) is linearly slidably arranged inside the second bushing (901). The gear (903) is installed at the end of the second splined shaft (902). The end of the stirring cylinder (5) is fixed with a gear ring (904) that meshes with the gear (903). The protective cover (905) is provided on the outside of the gear ring (904). The protective cover (905) is rotatably connected to the stirring cylinder (5). The second splined shaft (902) extends into the interior of the protective cover (905) and is rotatably connected to the protective cover (905). The second pulley assembly (906) is provided between the end of the second bushing (901) and the end of the first bushing (802).

5. The high-efficiency mixing device for processing compound lithium iron phosphate according to claim 2, characterized in that: A number of balls are embedded on the contact surface between the bottom of the slider (603) and the guide groove (604). The balls are evenly distributed along the length of the guide groove (604), and the outer wall of the balls rolls and fits against the inner wall of the guide groove (604).

6. The high-efficiency mixing device for processing compound lithium iron phosphate according to claim 4, characterized in that: The protective cover (905) is made of stainless steel and has an observation window on one side.

7. The high-efficiency mixing device for processing compound lithium iron phosphate according to claim 1, characterized in that: Rubber pads are fixed at the four corners of the base (1), and the bottom of the rubber pads is provided with anti-slip texture.

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