Homogenizer

Abstract

The utility model discloses a homogenizer, which comprises a tank body, the stirring helical ribbon is arranged in the tank body, and the stirring helical ribbon is arranged to be capable of rotating in the tank body; the main shaft is coaxial with a rotating central shaft of the stirring helical ribbon and can rotate relative to the stirring helical ribbon, and at least one first dispersion disc is arranged on the main shaft; the at least two dispersing shafts are rotationally arranged on the stirring helical ribbon, each dispersing shaft is at least provided with two second dispersing discs, and the first dispersing discs are located between the adjacent second dispersing discs; the utility model can solve the problems that the slurry in the tank body is influenced by gravity and centrifugal force and is deposited on the lower layer of the tank body, so that 100% flow replacement of the upper and lower layers of slurry is difficult to realize, and the consistency distribution of the upper, middle and lower layers of slurry is poorer in the slurry homogenizing process.

Description

Technical Field

[0001] This utility model relates to the field of homogenizer technology, specifically to a ribbon-type dispersion structure homogenizer. Background Technology

[0002] In the lithium-ion battery cell manufacturing process, the slurry mixing process is the first process step in the cell manufacturing process. It is to make a uniform solid-liquid mixture suspension by mixing solid particles and solvents in a fixed ratio and setting a pre-set stirring and dispersion step. During the preparation process, the uniformity of slurry dispersion is achieved by dispersion time, dispersion linear velocity and slurry flow rate driven by the stirring paddle.

[0003] Currently, the commonly used 2300L mixing tank is a double planetary mixing tank. The double planetary mixing tank is designed with two twisted paddles and two symmetrically installed dispersion shafts. Depending on the slurry level, each dispersion shaft is equipped with 2 to 4 dispersion discs. The rotation of the twisted paddles keeps the slurry in the mixing tank in a continuous turbulent state. At the same time, the high-speed rotation of the two eccentrically distributed dispersion shafts drives the dispersion discs to perform high-speed shearing work, which breaks down the micro-particles in the slurry. Under the stirring and high-speed shearing speed of up to 120min to 180min, the particles in the slurry can form a uniform solid-liquid mixture suspension by mutual collision and van der Waals forces.

[0004] However, during operation, the slurry at the low liquid level of the ribbon propeller is affected by gravity, resulting in differences in compaction density between the bottom slurry and the middle and upper layers. At the same time, during the stirring process, the slurry at the bottom of the tank is affected by gravity and centrifugal force, causing the bottom layer slurry to settle in the lower layer. This makes it difficult to achieve 100% flow replacement between the upper and lower layers of slurry, resulting in poor uniformity of the upper, middle and lower layers of slurry during homogenization. This is mainly reflected in the large deviation of 0.2% in the solid content and viscosity data when sampling and testing the upper, middle and lower layers of slurry. It is necessary to continuously extend the stirring and dispersion time to improve the slurry dispersion effect. Utility Model Content

[0005] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a homogenizer.

[0006] To achieve the above objectives, the technical solution adopted by this utility model includes: a tank; a stirring ribbon disposed within the tank and configured to rotate within the tank; a main shaft coaxial with the rotation center axis of the stirring ribbon and capable of rotating relative to the stirring ribbon, wherein at least one first dispersing disc is disposed on the main shaft; and at least two dispersing shafts rotatably disposed on the stirring ribbon, wherein each dispersing shaft is provided with at least two second dispersing discs, and the first dispersing discs are located between adjacent second dispersing discs.

[0007] This application configures two dispersion shafts that rotate synchronously with the stirring ribbon and a main shaft that can rotate relative to the stirring ribbon. A first dispersion disk is installed on the main shaft, and at least two second dispersion disks are installed on each dispersion shaft. The first dispersion shafts are cross-arranged between the connected second dispersion disks, so that when the first and second dispersion disks rotate, the slurry at the bottom of the tank can rise in the tank and be sheared and dispersed, so that the upper and lower layers of slurry in the tank can be effectively exchanged and flowed, improving the uniform distribution of slurry in the upper, middle and lower layers of the tank.

[0008] In the preferred embodiment of the homogenizer described above, the rotation direction of each of the dispersing shafts is opposite to the rotation direction of the main shaft.

[0009] In the preferred embodiment of the homogenizer described above, the main shaft is driven to rotate by a drive device, and at least two of the dispersing shafts rotate in the same direction as the main shaft by means of a synchronous transmission mechanism disposed on the main shaft.

[0010] In the preferred embodiment of the homogenizer described above, a drive mechanism is provided on the tank body, and the drive mechanism is configured to drive the stirring ribbon to rotate, and at least two of the dispersing shafts follow the rotation of the stirring ribbon.

[0011] In the preferred embodiment of the homogenizer described above, the synchronous transmission mechanism includes at least a driving gear disposed on the main shaft, a driven gear disposed on the dispersing shaft, and a synchronous belt connecting the driving gear and the driven gear.

[0012] In the preferred embodiment of the homogenizer described above, the dispersing shaft is rotatably mounted on the stirring ribbon via a bearing.

[0013] In the preferred embodiment of the homogenizer described above, two first dispersing discs are arranged on the main shaft, and three second dispersing discs are arranged on each dispersing shaft, with the two first dispersing discs spaced apart between the three second dispersing discs.

[0014] In the preferred embodiment of the homogenizer described above, the stirring screw and the first and second dispersing discs are all coated with polytetrafluoroethylene (PTFE).

[0015] In the preferred embodiment of the homogenizer described above, the distance between adjacent first dispersion discs and between adjacent second dispersion discs is 220-250 mm.

[0016] In the preferred embodiment of the homogenizer described above, the diameters of the first dispersion disc and the second dispersion disc are 280-330 mm.

[0017] The beneficial effects of this invention are that by configuring two dispersing shafts that rotate synchronously with the stirring ribbon and a main shaft that can rotate relative to the stirring ribbon, a first dispersing disc is installed on the main shaft, and at least two second dispersing discs are installed on each dispersing shaft. The first dispersing shafts are cross-arranged between the connected second dispersing discs, so that when the first and second dispersing discs rotate, the slurry at the bottom of the tank can rise in the tank and be sheared and dispersed, so that the upper and lower layers of slurry in the tank can be effectively exchanged and flowed, thereby improving the uniform distribution of slurry in the upper, middle and lower layers of the tank. Attached Figure Description

[0018] Figure 1 This is the front view of the present invention;

[0019] In the diagram: 1. Tank body; 2. Support frame; 3. Stirring ribbon; 4. Main shaft; 5. Dispersing shaft; 6. First dispersing disc; 7. Second dispersing disc; 8. Drive device; 91. Drive gear; 92. Driven gear; 93. Synchronous belt; 10. Drive mechanism; 11. Bearing. Detailed Implementation

[0020] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 utility model product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] As indicated in the background art, the slurry in tank 1 is affected by gravity and centrifugal force, causing slurry to deposit in the lower layer of tank 1. This makes it difficult to achieve 100% flow replacement between the upper and lower layers of slurry, resulting in poor uniform distribution of the upper, middle, and lower layers of slurry during homogenization. This invention provides a homogenizer, which is designed to utilize two dispersing shafts 5 that rotate synchronously with the stirring screw 3, a main shaft 4 that can rotate relative to the stirring screw 3, a first dispersing disc 6 mounted on the main shaft 4, and at least two second dispersing discs 7 mounted on each dispersing shaft 5. The first dispersing shafts 5 are cross-arranged between the connected second dispersing discs 7. This configuration allows the slurry at the bottom of tank 1 to rise and be sheared and dispersed within tank 1, enabling effective exchange and flow between the upper and lower layers of slurry within tank 1, thus improving the uniform distribution of the upper, middle, and lower layers of slurry within tank 1.

[0024] like Figure 1 As shown, the homogenizer of this utility model includes: a tank body 1; a stirring ribbon 3, which is disposed inside the tank body 1 and configured to rotate within the tank body 1; a main shaft 4, which is coaxial with the rotation center axis of the stirring ribbon 3 and can rotate relative to the stirring ribbon 3, and at least one first dispersion disk 6 is disposed on the main shaft 4; at least two dispersion shafts 5, which are rotatably disposed on the stirring ribbon 3, and each dispersion shaft 5 is disposed on at least two second dispersion disks 7, with the first dispersion disk 6 located between adjacent second dispersion disks 7.

[0025] See Figure 1 Tank 1 is a mixing tank, and the stirring screw 3 is arranged on the support frame 2. The support frame 2 is located at the top opening of the tank 1, and the stirring screw 3 extends into the tank 1. The number of stirring screws 3 arranged below the support frame 2 can be two.

[0026] See Figure 1 The main shaft 4 passes through the support frame 2 and is located in the middle of the support frame 2. The central axis of the main shaft 4 is coaxial with the central axis of the support frame 2. The main shaft 4 can rotate relative to the support frame 2. That is, when the stirring ribbon 3 rotates with the support frame 2, the main shaft 4 can remain stationary relative to the support frame 2 and the stirring ribbon 3.

[0027] See Figure 1At least two dispersion shafts 5 are configured. When two dispersion shafts 5 are configured, the two dispersion shafts 5 are evenly distributed on the support frame 2 with the central axis of the main shaft 4 or the central axis of the support frame 2 as the center. Each dispersion shaft 5 can rotate relative to the support frame 2 and rotate with the support frame 2 when the support frame 2 rotates.

[0028] See Figure 1 At least one first dispersion disk 6 is arranged on the main shaft 4, and at least two second dispersion disks 7 are arranged on each dispersion shaft 5. To facilitate the explanation of the positional relationship between the first dispersion disk 6 and the second dispersion disk 7, the following description uses only one first dispersion disk 6 and two second dispersion disks 7 as examples: the two second dispersion disks 7 on each dispersion shaft 5 are arranged along the height direction, the second dispersion disks 7 on the two dispersion shafts 5 have the same height, and in the height direction, one first dispersion disk 6 is located between two second dispersion disks 7.

[0029] It should be noted that the two stirring screws 3 are wound around the outside of the main shaft 4 and the first dispersing disk 6, and are misaligned with the dispersing shaft 5. This arrangement can effectively avoid the problem of collision between the first dispersing disk 6 and the second dispersing disk 7 and the stirring screws 3 when they rotate, so that the movement trajectory of the stirring screws 3 is always misaligned with the rotation path of the first dispersing disk 6 and the second dispersing disk 7.

[0030] When it is necessary to stir the slurry in tank 1, the slurry is first added into tank 1. Then, the support frame 2 is controlled to rotate, which drives the stirring screw 3 and the two dispersing shafts 5 to rotate synchronously. At the same time, the main shaft 4 and the dispersing shaft 5 are controlled to rotate synchronously, so that the main shaft 4 drives the first dispersing disk 6 to rotate and the dispersing shaft 5 drives the second dispersing disk 7 to rotate. The rotating stirring screw 3 can disperse and centrifuge the slurry inside tank 1. The rotating first dispersing disk 6 and the second dispersing disk 7 can lift the slurry at the bottom of tank 1 upward. Combined with the centrifugation of the slurry by the stirring screw 3, the slurry can always keep flowing in tank 1, so that the upper and lower layers of slurry in tank 1 can be effectively exchanged and flowed, avoiding the problem of poor uniformity of the upper, middle and lower layers of slurry in tank 1 due to the accumulation of the lower layer of slurry at the bottom of tank 1, thus ensuring the stirring and dispersing effect of the slurry in this application.

[0031] In one or more embodiments, the rotation direction of each dispersion shaft 5 is opposite to the rotation direction of the main shaft 4.

[0032] See Figure 1 When there are two dispersing shafts 5, the two dispersing shafts 5 can rotate synchronously with the support frame 2 and the stirring screw 3. At the same time, each dispersing shaft 5 can rotate relative to the support frame 2. The rotation direction of each dispersing shaft 5 is opposite to the rotation direction of the main shaft 4, so that the rotation direction of the first dispersing disk 6 and the second dispersing disk 7 are opposite.

[0033] Specifically, the first dispersing disc 6 rotates clockwise, which can lift the slurry below the bottom of the tank 1 upwards, and the second dispersing disc 7 rotates counterclockwise, which can lift the slurry in the tank 1 downwards. When the upward-flowing slurry in the tank 1 comes into contact with the downward-flowing slurry, the slurry in the tank 1 will continue to be in a staggered and tumbling flow, which will further accelerate the exchange efficiency of the various substances in the slurry and further reduce the problem of slurry accumulation at the bottom of the tank 1. The staggered configuration of the first dispersing disc 6 and the second dispersing disc 7 can maximize the dispersion of the slurry, ensure the consistency of the dispersion of the upper, middle and lower layers of slurry in the tank 1, and improve the dispersion quality of the slurry in this application.

[0034] Correspondingly, the first dispersion disk 6 can rotate counterclockwise, and the second dispersion disk 7 can rotate clockwise, so that the first dispersion disk 6 rolls the slurry at the bottom of the tank 1 upward, and the second dispersion disk 7 rolls the slurry inside the tank 1 downward. In this way, the rising and falling slurry in the upper, middle and lower layers of the tank 1 can also be alternately rolled and misaligned, avoiding the phenomenon of slurry accumulation at the bottom of the tank 1, optimizing the consistency of slurry dispersion in the upper, middle and lower layers of the tank 1, and strengthening the flow rate of slurry at the inner and outer rings of the tank 1, further improving the consistency of slurry dispersion in this application.

[0035] In one or more embodiments, the main shaft 4 is driven to rotate by the drive device 8, and at least two distributed shafts 5 rotate in the same direction as the main shaft 4 by means of a synchronous transmission mechanism disposed on the main shaft 4; the synchronous transmission mechanism includes at least a drive gear 91 disposed on the main shaft 4, a driven gear 92 disposed on the distributed shafts 5, and a synchronous belt 93 connecting the drive gear 91 and the driven gear 92.

[0036] See Figure 1 The drive device 8 used to control the rotation of the main shaft 4 relative to the support frame 2 can be a servo motor, and the rotating shaft end of the servo motor is connected to the end of the main shaft 4. When there are two dispersing shafts 5, the synchronous transmission mechanism includes at least two driving gears 91, two driven gears 92 and two synchronous belts 93. The two driving gears 91 are both mounted on the main shaft 4 and rotate synchronously with the main shaft 4. The two driven gears 92 are respectively mounted on the two dispersing shafts 5. The two synchronous belts 93 are respectively used to connect different groups of driving gears 91 and driven gears 92.

[0037] See Figure 1When it is necessary to control the main shaft 4 and the two dispersing shafts 5 to rotate synchronously, the main shaft 4 is first controlled to rotate by a servo motor. While the main shaft 4 is rotating, it drives the two driving gears 91 to rotate synchronously. With the help of the synchronous belt 93, the two driven gears 92 can rotate synchronously with the driving gears 91, so that the two dispersing shafts 5 and the second dispersing disk 7 on the dispersing shafts 5 rotate synchronously.

[0038] It should be noted that when the winding direction of the synchronous belt 93 is different, the rotation direction of the driving gear 91 and the driven gear 92 will change. When the synchronous belt 93 is wrapped around the driving gear 91 and the driven gear 92 in an "O" shape, the driven gear 92 rotates in the same direction as the driving gear 91. At this time, the first dispersion disk 6 and the second dispersion disk 7 rotate in the same direction. When the synchronous belt 93 is configured in a "Z" or "8" shape, the rotation direction of the driven gear 92 is opposite to the rotation direction of the driving gear 91. At this time, the first dispersion disk 6 and the second dispersion disk 7 rotate in opposite directions.

[0039] In one or more embodiments, a drive mechanism 10 is provided on the tank 1, and the drive mechanism 10 is configured to drive the stirring ribbon 3 to rotate, and at least two dispersing shafts 5 follow the rotation of the stirring ribbon 3.

[0040] See Figure 1 The drive mechanism 10 includes at least a drive motor, a main gear driven by the drive motor, and a secondary gear meshing with the main gear. The secondary gear is mounted on the support frame 2. By controlling the rotation of the main gear through the drive motor, the secondary gear drives the support frame 2 to rotate, thereby causing the stirring ribbon 3 to rotate inside the tank 1 to agitate the slurry inside the tank 1. The dispersing shaft 5 rotates synchronously with the support frame 2. By configuring the drive mechanism 10, the stirring ribbon 3 and the dispersing shaft 5 can rotate relative to the main shaft 4, ensuring that the first dispersing disc 6 and the second dispersing disc 7 on the dispersing shaft 5 can effectively disperse the slurry inside the tank 1.

[0041] In one or more embodiments, the dispersion shaft 5 is rotatably mounted on the stirring ribbon 3 via a bearing 11. See also Figure 1 The stirring screw 3 is mounted on the support frame 2, the bearing 11 is mounted on the support frame 2, and the dispersing shaft 5 is mounted on the support frame 2 via the bearing 11, so that the dispersing shaft 5 can rotate relative to the stirring screw 3 and the support frame 2, ensuring the rotation efficiency of the dispersing shaft 5.

[0042] In one or more embodiments, two first dispersing disks 6 are arranged on the main shaft 4, and three second dispersing disks 7 are arranged on each dispersing shaft 5, with the two first dispersing disks 6 spaced apart between the three second dispersing disks 7.

[0043] See Figure 1This design allows the slurry inside tank 1 to undergo multiple vertical displacement and tumbling flows, further reducing the possibility of slurry accumulation in tank 1 and optimizing the consistency of slurry dispersion in the upper, middle, and lower layers of tank 1.

[0044] In one or more embodiments, the stirring ribbon 3, the first dispersion disk 6, and the second dispersion disk 7 are all coated with polytetrafluoroethylene.

[0045] It should be noted that the polytetrafluoroethylene coating has a certain self-lubricating effect. When polytetrafluoroethylene is coated on the first dispersion disk 6 and the second dispersion disk 7, it can reduce the possibility of slurry adhering to the first dispersion disk 6 or the second dispersion disk 7.

[0046] In one or more embodiments, the distance between adjacent first dispersion disks 6 and adjacent second dispersion disks 7 is 220-250 mm; the diameter of the first dispersion disk 6 and the second dispersion disk 7 is 280-330 mm.

[0047] It should be noted that the diameters of the first dispersion disc 6 and the second dispersion disc 7 are selectable and need to be matched according to the size of the tank 1 and the size of the stirring screw 3. In addition, the spacing in the height direction between several first dispersion discs 6 and several second dispersion discs 7 is selectable and should be determined according to the actual production situation.

[0048] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

[0049] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A homogenizer, characterized in that, include: Tank body; A stirring ribbon is disposed within the tank and configured to rotate within the tank. The main shaft is coaxial with the rotation center axis of the stirring ribbon and can rotate relative to the stirring ribbon. At least one first dispersion disc is disposed on the main shaft. At least two dispersing shafts are rotatably disposed on the stirring ribbon, and at least two second dispersing disks are disposed on each dispersing shaft, with the first dispersing disk located between adjacent second dispersing disks.

2. The homogenizer according to claim 1, characterized in that: The rotation direction of each of the dispersion axes is opposite to the rotation direction of the main shaft.

3. The homogenizer according to claim 2, characterized in that: The main shaft is driven to rotate by a drive device, and at least two of the distributed shafts rotate in the same direction as the main shaft by means of a synchronous transmission mechanism disposed on the main shaft.

4. The homogenizer according to claim 1 or 3, characterized in that: The tank is equipped with a drive mechanism configured to drive the stirring ribbon to rotate, and at least two of the dispersion shafts follow the rotation of the stirring ribbon.

5. The homogenizer according to claim 3, characterized in that: The synchronous transmission mechanism includes at least a driving gear disposed on the main shaft, a driven gear disposed on the distribution shaft, and a synchronous belt connecting the driving gear and the driven gear.

6. The homogenizer according to claim 1, characterized in that: The dispersion shaft is rotatably mounted on the stirring ribbon via bearings.

7. The homogenizer according to claim 1 or 2, characterized in that: The main shaft is equipped with two first dispersing disks, and each dispersing shaft is equipped with three second dispersing disks, with the two first dispersing disks spaced apart between the three second dispersing disks.

8. The homogenizer according to claim 1, characterized in that: The stirring screw and the first and second dispersion discs are all coated with polytetrafluoroethylene.

9. The homogenizer according to claim 7, characterized in that: The distance between adjacent first dispersion disks and adjacent second dispersion disks is 220-250mm.

10. The homogenizer according to claim 9, characterized in that: The diameters of the first and second dispersion discs are 280-330 mm.

Images