Homogenizing and mixing equipment

Abstract

The utility model belongs to the technical field of material mixing, and particularly provides homogenate mixing equipment. The homogenate mixing equipment comprises a premixing device and at least two feeding screw conveyors, each feeding screw conveyor comprises a feeding port, a discharging port, a spiral feeding structure and a driving device capable of controlling the rotating speed, the feeding port is used for adding materials, the discharging port is communicated with the premixing device, and the driving device drives the spiral feeding structure to rotate. The feeding screw conveyor is adopted to convey materials to the premixing device, and the feeding speed of the feeding screw conveyor is controlled according to the set rotating speed, so that the materials are conveyed and added into the premixing device according to the set proportion, premixing of the set proportion can be achieved when the materials enter the premixing device, the premixing time is shortened while the premixing effect is guaranteed, and the premixing efficiency is improved. And the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of material mixing, in particular to a homogenizing mixing device. Background Art

[0002] In the production process of lithium-ion batteries, the homogenization process is a key process. The uniformity of slurry mixing affects the capacity and rate performance of the battery. In the actual production process, some materials with small additions or dispersion are difficult to distribute evenly. On the one hand, this can easily cause unstable material viscosity, easy agglomeration and sedimentation, and cause scratches or blockages on the pole pieces during coating. On the other hand, it can also cause poor consistency of the battery cells. In the face of this problem, the commonly used method is to extend the time of dispersion and stirring or manually add some small doses of additives, but extending the stirring time will seriously reduce production capacity and increase production costs. In addition, the manual addition of additives is prone to introduce foreign matter.

[0003] In the prior art, in order to improve the problem of uneven slurry mixing, solutions for adding a premixing process have also begun to appear in recent years. For example, the invention patent application document with application publication number CN110052209A (publication date: 2019.07.26) discloses a double-screw shaft continuous homogenization system for lithium battery slurry, which includes a powder storage bin, a liquid storage tank, a spiral premixing conveyor (premixing device), and a double-screw mixer (main mixing device). The powder storage bin and the liquid storage tank are connected to the premixing conveyor through a pipeline. Some powders and liquid additives that are difficult to mix can be transported to the premixing conveyor through a pipeline, and premixed in the premixing conveyor. The premixed materials enter the double-screw mixer for further stirring and mixing.

[0004] When the above-mentioned homogenization system transports materials to the premixing conveyor, the materials are transported from the powder storage bin or liquid storage tank to the premixing conveyor through a pipeline. In actual production, it is necessary to first weigh various materials according to the set ratio, and then transport all the materials to the premixing conveyor, and finally premix the materials. However, the proportions of different materials vary greatly. In fact, for materials with a smaller proportion, it is difficult to fully mix them with other materials without sufficient time. Therefore, in order to ensure that the materials can be fully mixed in the premixing conveyor, they need to be stirred and mixed in the premixing conveyor for a sufficient period of time before they can be transported to the double-screw mixer. The efficiency in actual production is still not high. Utility Model Content

[0005] The utility model aims to provide a homogenizing and mixing device to solve the technical problem of low production efficiency of the homogenizing and mixing device with a premixing device in the prior art.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the homogenizing mixing equipment provided by the utility model is:

[0007] A homogenizing mixing device includes a premixing device and at least two feeding screws. The feeding screws include a feed port, a discharge port, a spiral feeding structure and a drive device with controllable rotation speed. The feed port is used to add materials, the discharge port is connected to the premixing device, and the drive device is used to drive the spiral feeding structure to rotate.

[0008] As a further improvement, the feeding screw is arranged horizontally.

[0009] As a further improvement, at least two feed screws are arranged in a group symmetrically with respect to the premixing device.

[0010] As a further improvement, the feed screws are evenly spaced around the premixing device.

[0011] As a further improvement, the premixing device is equipped with a rotary stirring mechanism.

[0012] As a further improvement, the rotation axis of the stirring mechanism extends vertically.

[0013] As a further improvement, the stirring mechanism is a spiral stirring mechanism.

[0014] As a further improvement, the driving device is a driving motor.

[0015] As a further improvement, the homogenization mixing device also includes a main mixing device connected to the premixing device, and the main mixing device is a spiral mixer.

[0016] As a further improvement, the discharge port of the premixing device is directly mounted on the feed port of the spiral mixer.

[0017] The beneficial effect is that the utility model belongs to an improved invention. Specifically, when in use, the material can be added to the feeding screw machine through the feed port, and the spiral feeding structure transports the material to the discharge port and to the premixing device. Since the rotation speed of the driving device is controllable, the feeding speed of the spiral feeding structure can also be controlled, thereby controlling the amount of material added to the premixing device. Therefore, the utility model can realize the delivery of materials to the premixing device according to the set ratio. For example, if material A is 10 parts and material B is 1 part, material A enters feeding screw machine A and material B enters feeding screw machine B. By setting the rotation speed of the feeding screw machine according to the component ratio, it can be ensured that the ratio of the material entering the premixing device in real time is correct. The material can be mixed in the set ratio at the moment of entering the premixing device, thus realizing real-time premixing, shortening the premixing time and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural stereogram of an embodiment of a homogenizing and mixing device in the utility model;

[0019] Figure 2 It is a top view of an embodiment of a homogenizing and mixing device in the utility model;

[0020] Figure 3 It is a cross-sectional view of the premixing device of the embodiment of the homogenizing mixing equipment in the utility model.

[0021] Description of reference numerals:

[0022] 1. Feeding screw machine; 2. Driving motor; 3. Premixing device; 4. Spiral mixer; 5. Gearbox; 101. Feed inlet; 401. Slurry outlet. DETAILED DESCRIPTION

[0023] In order to improve the efficiency of the premixing process, the basic technical concept of the utility model is to use a feeding screw machine to convey materials to the premixing device, and use a driving device with controllable speed. When in use, the feeding speed of the feeding screw machine is controlled according to the set speed to realize the conveying of added materials to the premixing device according to the set proportion. The materials can be premixed in the set proportion when they enter the premixing device, which ensures the premixing effect while shortening the premixing time and improving production efficiency.

[0024] The present invention is further described in detail below in conjunction with the embodiments.

[0025] Specific embodiments of the homogenization mixing device provided by the utility model:

[0026] The homogenization mixing equipment provided in this embodiment is as follows Figure 1-Figure 3 As shown, it includes a main mixing device and a premixing device 3. The so-called premixing device 3 refers to a device for premixing materials. It naturally has an inlet for materials to enter and an outlet for materials to flow out. The outlet is connected to the main mixing device. The materials enter the main mixing device through the inlet for premixing. The premixed materials flow to the main mixing device through the outlet and are further mixed in the main mixing device. The inlet of the premixing device 3 is connected with two feeding screws 1. The so-called feeding screw 1 refers to a screw conveyor for adding and conveying materials to the premixing device 3. It includes a feed port 101, a discharge port, a spiral feeding structure (spiral blades) and a driving device, and naturally also includes a shell. The feed port 101 is used to add materials, and the discharge port is connected to the premixing device 3. The driving device is used to drive the spiral feeding structure to rotate, and the driving device is a driving device with controllable speed. As a preferred embodiment, the driving device is a driving motor 2, and the speed of the driving motor 2 can be controlled by a motor controller. This control method is simple and efficient, and is also suitable for production workshops mainly driven by electric drive. Of course, in other implementations, the driving device may also be a hydraulic motor, and controlling the oil intake of the hydraulic motor may also control the rotation speed of the spiral feeding structure.

[0027] When in use, different materials can be added to the two feeding screw machines 1 respectively, and the speed of the feeding screw machine 1, that is, the speed of the spiral feeding structure, can be set according to the ratio of different materials. Since the speed of the spiral feeding structure is controllable, the feeding amount of the spiral feeding structure per unit time is actually controllable. Figure 2 The material conveyed by the feeding screw machine 1 on the left side is material A, and the material conveyed by the feeding screw machine 1 on the right side is material B. The components of material A are 10 parts, and the components of material B are 1 part. The conveying speeds of the two feeding screw machines 1 are set according to the characteristics of the materials (fluidity, density, particle size, etc.) to ensure that the materials A and B entering the feeding screw machine 1 are in a set ratio at the same time. Therefore, when the materials enter the premixing device 3, the mixing of the set ratio can be completed, and at this time, there is no need to wait too long for the premixing of the materials, which improves the production efficiency.

[0028] Specifically, Figure 2 As shown, as a preferred embodiment, the feeding screw machine 1 is arranged to extend horizontally, which is convenient for installing the feeding screw machine 1 at the production site. Of course, in other embodiments, the feeding screw machine 1 can also be arranged at a certain angle, such as tilted upward.

[0029] In addition, the two feeding screws 1 are arranged symmetrically with respect to the premixing device 3, that is, Figure 2 The two feeding screw machines 1 in the premixing device 3 form a group, so that after the installation is completed, the forces on both sides of the premixing device 3 are more balanced. It should be noted here that Figure 2 Only an exemplary method including two feeding screws 1 is given. In fact, the positive and negative electrode slurries of the battery are different, and the number of difficult-to-mix materials in the slurry is also different. In other embodiments, more than three feeding screws 1 can be arranged, corresponding to the conveying of different difficult-to-mix materials. For example, there can be four feeding screws 1, and the four feeding screws 1 are arranged in groups symmetrically in pairs. In other embodiments, if more than three feeding screws 1 are configured, each feeding screw 1 can also be evenly spaced around the premixing device. For example, if three feeding screws are arranged, the angle between two adjacent feeding screws is 120°.

[0030] Furthermore, if Figure 2As shown, the premixing device 3 adopts a rotary stirring mechanism, so the premixing device 3 is also equipped with a driving motor 2. For this premixing method of mixing and delivering, the rotary stirring mechanism has a better mixing effect. Of course, this is relative to the ultrasonic excitation stirring in other embodiments. Furthermore, the axis of rotation of the stirring mechanism extends vertically, that is, the material of the premixing device 3 can fall into the spiral mixer 4 under the action of its own weight. Preferably, the stirring mechanism also selects a spiral stirring mechanism, such as a spiral blade. This spiral structure can guide the material to be transported to the spiral mixer 4 while stirring. Of course, in other embodiments, the stirring mechanism can also be a planetary stirring mechanism. In addition, when the stirring mechanism is a spiral stirring mechanism, the premixing device 3 can also be arranged horizontally, and the material can also be transported to the spiral mixer 4 under the conveying action of the stirring mechanism.

[0031] In this embodiment, the main mixing device adopts a spiral mixer 4. The materials mixed by the premixing device 3 enter the spiral mixer 4. The spiral mixer 4 can achieve stirring while conveying, so that the continuous stirring preparation of the slurry is realized, and the mixed slurry can be delivered from the slurry outlet 401. Specifically, the spiral mixer 4 is also driven by the drive motor 2. Considering the large size of the spiral mixer 4, the drive motor 2 is also connected to the gearbox 5. The power is conveyed to the spiral shaft of the spiral mixer 4 after being decelerated and torque-increased by the gearbox 5. Of course, in other embodiments, since the difficult-to-mix materials have been premixed in the premixing device 3 according to the set ratio, the main mixing device can adopt other stirring and mixing devices, such as a planetary stirring device, a ball mill stirring device, etc.

[0032] On the basis of adopting the spiral mixer 4, the discharge port of the premixing device 3 can be directly installed on the feed port of the spiral mixer 4. In this case, there is no need to use other connecting pipes. The material flowing out of the premixing device 3 can flow directly to the spiral mixer 4, which is convenient and efficient.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A homogenizing mixing device, comprising a premixing device, characterized in that: It also includes at least two feeding screw machines, which include a feed port, a discharge port, a spiral feeding structure and a drive device with controllable speed. The feed port is used to add materials, the discharge port is connected to the premixing device, and the drive device is used to drive the spiral feeding structure to rotate.

2. The homogenizing and mixing device according to claim 1, characterized in that: The feeding screw machine is arranged horizontally.

3. The homogenizing and mixing device according to claim 1 or 2, characterized in that: At least two feed screws are arranged in a group symmetrically with respect to the premixing device.

4. The homogenizing and mixing device according to claim 1 or 2, characterized in that: The feeding screw machines are evenly spaced around the premixing device.

5. The homogenizing and mixing device according to claim 1, characterized in that: The premixing device is equipped with a rotary stirring mechanism.

6. The homogenizing and mixing device according to claim 5, characterized in that: The rotation axis of the stirring mechanism extends vertically.

7. The homogenizing and mixing device according to claim 5 or 6, characterized in that: The stirring mechanism is a spiral stirring mechanism.

8. The homogenizing and mixing device according to claim 1 or 2, characterized in that: The driving device is a driving motor.

9. The homogenizing and mixing device according to claim 1 or 2, characterized in that: The homogenizing and mixing equipment also includes a main mixing device communicated with the premixing device, and the main mixing device is a spiral mixer.

10. The homogenizing and mixing device according to claim 9, characterized in that: The discharge port of the premixing device is directly installed on the feed port of the spiral mixer.

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