Round vibrating screen for recycling lithium batteries

Abstract

The utility model discloses a round vibrating screen for recycling lithium batteries. The round vibrating screen comprises a vibrator, a connecting cylinder, a damping spring, a screen cylinder, a screen mesh and an ultrasonic generating assembly. The upper surface of the screen cloth protrudes outwards, contact between materials and the screen face is kept, the phenomenon of empty materials is reduced, due to the fact that the lower surface of the screen cloth protrudes outwards, powder filtered through the screen cloth reaches the center of the lower layer of screen cloth from the center of the bottom face of the upper layer of screen cloth, and screening efficiency is improved. An ultrasonic vibration wave with high frequency and low amplitude is overlaid on the screen, particles on the screen receive huge ultrasonic acceleration, materials on the screen surface are always kept in a suspended state, and therefore screen blocking factors such as adhesion and wedging are restrained, the materials prone to caking are loosened again through secondary crushing of ultrasonic vibration, the screening efficiency and the screen cleaning efficiency are improved, and the screening quality is improved. The screening problems of strong adsorbability, easy agglomeration and the like in a traditional circular vibrating screen are solved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery recycling, and in particular to a circular vibrating screen for lithium battery recycling. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloys as positive and negative electrode materials and a non-aqueous electrolyte solution. A traditional lithium-ion battery consists of five main parts: positive electrode material, negative electrode material, electrolyte, diaphragm, and casing. Because lithium-ion batteries contain many harmful substances that can pollute the environment, they need to be recycled after degradation. The recycling process begins by crushing large components such as the battery casing and metal terminals into smaller fragments. These fragments are then further pulverized using a crusher into a fine black powder that can be processed by a negative pressure fan. This black powder is a mixture that forms the positive electrode material of the battery. For practical use, the black powder needs to be further separated into recyclable metals such as copper and aluminum using a vibrating sieve.

[0003] A circular vibrating screen is a high-precision fine powder screening device suitable for screening and filtering granular, powdery, and viscous materials. It uses a vertical motor as the excitation source, with eccentric weights installed at both ends of the motor. This converts the motor's rotational motion into a three-dimensional motion (horizontal, vertical, and inclined), which is then transmitted to the screen surface for material screening. The screen mesh is one of the most important components of the vibrating screen. In existing technologies, when particles adhere to and agglomerate or wed into the screen mesh, the mesh is easily clogged, especially in high humidity conditions. Once clogging occurs, screening efficiency drops sharply. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a circular vibrating screen for lithium battery recycling.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a circular vibrating screen for lithium battery recycling, comprising a vibrating base, on which a vibrator, a connecting cylinder, and multiple damping springs are mounted. The bottom of the connecting cylinder is connected to the vibrator, and the multiple damping springs are all connected to the connecting cylinder. Several screen cylinders are stacked sequentially on the connecting cylinder from bottom to top, and a screen cover is fitted to the top of each screen cylinder. Several screen meshes are mounted on the screen cylinders, and the screen cylinders and screen meshes are adapted to each other. Several discharge pipes are fixedly installed on one side of each screen cylinder. Several clamping rings are mounted between each screen cylinder and the screen cover, and the clamping rings are used to clamp and press-fit the screen cylinders and screen covers. An ultrasonic generating assembly includes an ultrasonic generator, several transducers, and several conversion connectors. The transducers are respectively connected to the bottom of the screen meshes, and the conversion connectors are respectively fixed to one side of each screen cylinder. The transducers are electrically connected to the ultrasonic generator through the conversion connectors.

[0007] In a preferred embodiment of this invention, the top of the vibrator is connected to the bottom of the connecting cylinder, the damping springs are evenly distributed along the circumference of the connecting cylinder, and the vibrator is used to drive the connecting cylinder to vibrate on the damping springs.

[0008] As a preferred embodiment of this utility model, the bottom of the screen cover is circular, the bottom diameter of the screen cover matches the outer diameter of the topmost screen cylinder, and they are fastened together by the clamping ring. The top of the screen cover is connected to an external conveyor belt through a connecting pipe to provide the material to be screened.

[0009] As a preferred technical solution of this utility model, the upper and lower surfaces of the screen are both outwardly convex arc shapes, the outer edge of the screen corresponds one-to-one with the position of the binding ring, the screen is made of dense mesh threads evenly woven, and the mesh diameter of the screen decreases layer by layer from top to bottom, which is used to screen out particles of different diameters.

[0010] In a preferred embodiment of this invention, the ultrasonic generator is electrically connected to the transducer. The ultrasonic generator can convert mains power into high-frequency electrical energy to provide high-frequency electrical energy to the transducer.

[0011] As a preferred embodiment of this utility model, the transducer is electrically connected to the conversion connector and is used to generate high-frequency, low-amplitude ultrasonic waves at the bottom of each of the several screens.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. Because the upper surface of the screen is convex, it maintains the contact between the material and the screen surface, reducing the phenomenon of empty material. The fine material in contact with the screen is quickly vibrated from the middle of the screen to the discharge pipe located at the edge after being screened. In addition, because the lower surface of the screen is convex, the powder filtered by the screen reaches the center of the bottom surface of the next screen from the center of the upper screen, improving the screening efficiency.

[0014] 2. A high-frequency, low-amplitude ultrasonic vibration wave is superimposed on the screen. The particles on the screen receive huge ultrasonic acceleration, keeping the material on the screen surface in a suspended state. This suppresses factors such as adhesion and wedging that cause screen blockage. The secondary crushing by ultrasonic vibration loosens the easily agglomerated material again, improving screening efficiency and screen cleaning efficiency. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is the front view of this utility model;

[0018] Figure 3 This is a cross-sectional view of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the screen in this utility model;

[0020] In the diagram: 1. Vibrator; 2. Connecting cylinder; 3. Shock-absorbing spring; 4. Screen cylinder; 5. Screen cover; 6. Screen mesh; 7. Discharge pipe; 8. Binding ring; 9. Ultrasonic generator; 10. Transducer; 11. Adapter connector. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] In the attached diagram, all identical reference numerals refer to the same components.

[0023] like Figure 1-4As shown, this utility model provides a circular vibrating screen for lithium battery recycling, including a vibrating base, on which a vibrator 1, a connecting cylinder 2, and multiple damping springs 3 are arranged. Preferably, the connecting cylinder 2 is conical, and its bottom is bolted to the top of the vibrator 1. The multiple damping springs 3 are movably connected to the bottom of the connecting cylinder 2, and the bottom of the damping springs 3 is movably connected to a support column on the circumference of the vibrating base. There are three screen cylinders 4, which are stacked on the connecting cylinder 2 from bottom to top. The top of the screen cylinder 4 is fastened to the screen cover 5 by a retaining ring 8. There are three screens 6, and the edges of the three screens 6 are fastened to the screen cylinders 4. The inner diameter of the screen cylinder 4 is the same as that of the screens. The outer diameters of the screens 6 are matched, and all screens 6 can be removed from the screen cylinder 4; several discharge pipes 7 are fixedly installed on one side of the screen cylinder 4 and connected to the screen cylinder 4 to discharge the granular powder left by screening; several clamping rings 8 are assembled between each screen cylinder 4 and the screen cover 5, and the clamping rings 8 are used to clamp and press the screen cylinder 4 and the screen cover 5 together; the ultrasonic generating assembly includes an ultrasonic generator 9, three transducers 10 and three conversion connectors 11. The three transducers 10 are fixedly connected to the bottom of the screen 6, and the three conversion connectors 11 are fixed to one side of the screen cylinder 4. The three transducers 10 are electrically connected to the ultrasonic generator 9 through the conversion connectors 11.

[0024] The method of using this utility model is as follows:

[0025] 1. Turn the fine-tuning knob on the ultrasonic generator to the minimum and turn on the power switch of the ultrasonic generator normally;

[0026] 2. Start the vibrator 1 of the circular vibrating screen, add a little material and fine-tune the fine-tuning knob on the ultrasonic generator 9 to make the screen 6 reach an ideal vibration state, and check that the screened particles reach the predetermined size.

[0027] 3. If the particle separation is normal, the material can be fed from the feed port on the screen cover 5 and then the normal operation can begin.

[0028] Furthermore, the top of the vibrator 1 is connected to the bottom of the connecting cylinder 2 by a thread, and the damping springs 3 are evenly distributed along the circumference of the connecting cylinder 2. The vibrator 1 is used to drive the connecting cylinder 2 to vibrate on the damping springs 3. Preferably, the vibrator 1 can generate vibration waves of a certain frequency in the vertical direction, thereby driving the connecting cylinder 2 to be forced to vibrate up and down at the frequency of the vibrator 1.

[0029] Furthermore, the bottom of the screen cover 5 is circular, and the bottom diameter of the screen cover 5 matches the outer diameter of the top screen cylinder 4. They are connected by a clamping ring (8). The top of the screen cover 5 is connected to an external conveyor belt (not shown) through a connecting pipe to provide the material to be screened. Preferably, the connecting pipe on the screen cover 5 is a closed corrugated hose, and the corrugated hose is fixed to the screen cover 5 by a circular hose clamp.

[0030] Furthermore, both the upper and lower surfaces of the screen 6 are outwardly convex arc shapes. The outer edge of the screen 6 corresponds one-to-one with the position of the binding ring 8. The screen 6 is made of densely woven mesh threads, and the mesh diameter of the screen 6 gradually decreases from top to bottom to separate particles of different diameters. Preferably, there are three screens 6, with the mesh size gradually decreasing from top to bottom to distinguish and filter powder particles of different diameters. Because the upper surface of the screen 6 is convex, it maintains contact between the material and the screen surface, reducing the phenomenon of empty material. The fine material in contact with the screen 6 is quickly vibrated from the middle of the screen 6 to the discharge pipe 7 located at the edge after being screened by the screen 6. In addition, because the lower surface of the screen 6 is convex, the powder filtered by the screen 6 reaches the center of the bottom surface of the next screen 6 from the center of the upper screen 6, improving the screening efficiency.

[0031] Furthermore, the ultrasonic generator 9 is electrically connected to the transducer 10. The ultrasonic generator 9 can convert mains power into high-frequency electrical energy to provide high-frequency electrical energy to the transducer 10. Preferably, the ultrasonic generator converts external 220V, 50HZ AC power into 38KHZ high-frequency electrical energy and then transmits the high-frequency electrical energy to the transducer 10. In addition, the ultrasonic generator 9 is also equipped with a fine-tuning knob for fine-tuning the frequency of the high-frequency electrical energy. The ultrasonic vibration frequency can be finely adjusted according to the powder sieving results.

[0032] Furthermore, the transducer 10 is electrically connected to the conversion connector 11 to generate high-frequency, low-amplitude ultrasonic waves at the bottom of several screens 6. Preferably, after receiving 38kHz high-frequency electrical energy, the transducer 10 converts the high-frequency electrical energy into 38kHz mechanical vibration, driving the screens 6 to vibrate at high frequency. The powder on the screens 6 receives a huge ultrasonic acceleration, keeping the material on the screen surface in a suspended state, thereby suppressing adhesion, wedging and other clogging factors, thus achieving the purpose of efficient screening and screen cleaning.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A circular vibrating screen for lithium battery recycling, characterized in that, The system includes a vibrating base, on which a vibrator (1), a connecting cylinder (2), and multiple damping springs (3) are mounted. The bottom of the connecting cylinder (2) is connected to the vibrator (1), and the multiple damping springs (3) are all connected to the connecting cylinder (2). Several screen cylinders (4) are stacked sequentially from bottom to top on the connecting cylinder (2), and a screen cover (5) is mounted on the top of each screen cylinder (4). Several screen meshes (6) are mounted on the screen cylinders (4), and the screen cylinders (4) are compatible with the screen meshes (6). Several discharge pipes (7) are fixedly installed on the screen cylinders (4). One side of the screen (6); several clamping rings (8), several clamping rings (8) are assembled between each screen cylinder (4) and screen cover (5), the clamping rings (8) are used to clamp and press the screen cylinder (4) and screen cover (5) together; ultrasonic generating assembly, the ultrasonic generating assembly includes an ultrasonic generator (9), several transducers (10) and several conversion connectors (11), several transducers (10) are respectively connected to the bottom of the screen (6), several conversion connectors (11) are respectively fixed on one side of the screen cylinder (4), and several transducers (10) are respectively electrically connected to the ultrasonic generator (9) through the conversion connectors (11).

2. The circular vibrating screen for lithium battery recycling according to claim 1, characterized in that, The top of the vibrator (1) is connected to the bottom of the connecting cylinder (2), and the damping springs (3) are evenly distributed along the circumference of the connecting cylinder (2). The vibrator (1) is used to drive the connecting cylinder (2) to vibrate on the damping springs (3).

3. The circular vibrating screen for lithium battery recycling according to claim 1, characterized in that, The bottom of the screen cover (5) is circular. The bottom diameter of the screen cover (5) matches the outer diameter of the topmost screen cylinder (4) and is fastened together by the clamping ring (8). The top of the screen cover (5) is connected to an external conveyor belt through a connecting pipe to provide the material to be screened.

4. A circular vibrating screen for lithium battery recycling according to claim 1, characterized in that, The upper and lower surfaces of the screen (6) are both outwardly convex arc shapes. The outer edge of the screen (6) corresponds one-to-one with the position of the binding ring (8). The screen (6) is uniformly woven from dense mesh threads. The mesh diameter of the screen (6) decreases layer by layer from top to bottom, which is used to screen out particles of different diameters.

5. A circular vibrating screen for lithium battery recycling according to claim 1, characterized in that, The ultrasonic generator (9) is electrically connected to the transducer (10). The ultrasonic generator (9) can convert mains power into high-frequency electrical energy to provide high-frequency electrical energy to the transducer (10).

6. A circular vibrating screen for lithium battery recycling according to claim 1, characterized in that... The transducer (10) is electrically connected to the conversion connector (11) and is used to generate high-frequency, low-amplitude ultrasonic waves at the bottom of each of the several screens (6).

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