Novel double-layer filtering device

Abstract

The utility model belongs to the technical field of filtering devices, and particularly relates to a novel double-layer filtering device. The filter comprises a double-layer rack, a net filter assembly mounted on the upper layer of the double-layer rack and a magnetic filter assembly mounted on the lower layer of the double-layer rack, the screen filter assembly comprises a first filter barrel, a filter screen mounted in the first filter barrel and a barrel cover covering the top end of the first filter barrel; the magnetic filtering assembly comprises a second filtering barrel, a top cover arranged at the top end of the second filtering barrel in a covering mode and a magnetic bar installed in the second filtering barrel, and a magnetic filtering cover is installed outside the magnetic bar in a sleeving mode; according to the utility model, the net filtering assembly and the magnetic filtering assembly are arranged to be of an upper and lower two-layer structure, so that large-particle materials can be filtered, metal impurities can be filtered out, and slurry can directly enter the magnetic filtering assembly to filter the metal impurities after being filtered in the net filtering assembly; and various impurities in the slurry can be filtered by only one device, so that the filtering efficiency can be effectively improved, and the quality of the slurry can be effectively improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of filtration devices, specifically relating to a novel double-layer filtration device. Background Technology

[0002] In recent years, the lithium-ion battery manufacturing industry has experienced unprecedented development. Under these circumstances, the requirements for the quality and energy density of lithium-ion batteries have become increasingly stringent. Therefore, it is necessary to strengthen the control of each production process in battery manufacturing, and improve the product quality and capacity of each process. The consistency and uniformity of lithium battery slurry directly affect the quality of lithium battery electrode coating, thereby affecting the battery capacity from the cell to the module. Therefore, in the preparation process of lithium-ion battery positive and negative electrode slurries, it is necessary to remove large particles and magnetic materials from the slurry. The purpose is twofold: first, to reduce the occurrence of coating line marks, particle scratches, and other defects in the electrode appearance caused by large-diameter particles during the coating stage; and second, to prevent magnetic materials present in the slurry from affecting the electrochemical performance and even the battery safety performance during charging and discharging. Currently, various industries typically install magnets and screen filters separately on the slurry conveying pipeline to filter and remove iron from the slurry in stages. However, this method still has some shortcomings: First, it requires two devices, which occupy a large space and are costly; second, the residence time at the magnetic rod is short, and the contact area between the magnetic rod and the slurry is limited, resulting in poor demagnetization effect, reduced electrode slurry quality, and poor production efficiency; third, the pipeline design is relatively complex with many joints, resulting in poor pipeline airtightness, and a pump needs to be added between the screen filter and the magnetic filter device, which is costly. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies, such as the need for two separate devices, large footprint, high cost, short residence time of the magnetic rod in the slurry, and limited contact area leading to poor demagnetization effect. This invention provides a novel double-layer filtration device that can filter large particles and magnetic materials in the slurry with only one device, saving floor space, effectively improving filtration effect, and saving costs.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A novel double-layer filtration device includes a double-layer frame, a mesh filter assembly installed on the upper layer of the double-layer frame, and a magnetic filter assembly installed on the lower layer of the double-layer frame. The outlet of the mesh filter assembly is connected to the inlet of the magnetic filter assembly. The mesh filter assembly includes a first filter barrel, a filter screen installed inside the first filter barrel, and a barrel cover covering the top of the first filter barrel. The magnetic filter assembly includes a second filter barrel, a top cover covering the top of the second filter barrel, and at least one magnetic rod installed inside the second filter barrel. The magnetic rod is mounted on the lower surface of the top cover by a mounting plate. A magnetic filter cover is installed around the magnetic rod and fixed to the lower surface of the top cover. The slurry first enters the mesh filter assembly for preliminary filtration and then enters the magnetic filter assembly for filtration of metal impurities.

[0005] Furthermore, the magnetic filter cover is provided with n layers, where n≥2; a labyrinthine channel is formed between the n layers of magnetic filter covers.

[0006] Furthermore, each layer of the magnetic filter cover has an outlet, and a baffle is vertically fixed at the outlet of each layer of the magnetic filter cover. The outlets of adjacent layers of the magnetic filter cover are located on both sides of the baffle. The inlet is located at the center of the magnetic filter cover. The slurry enters the labyrinth channel from the inlet and flows outward along the labyrinth channel, passing through the labyrinth channel layer by layer, so that each magnetic rod demagnetizes the slurry. The slurry is discharged from the outlet of the outermost magnetic filter cover.

[0007] Furthermore, when n is odd, the outlet of the innermost magnetic filter and the outlet of the outermost magnetic filter are located on the same side of the baffle; when n is even, the outlet of the innermost magnetic filter and the outlet of the outermost magnetic filter are located on opposite sides of the baffle.

[0008] Furthermore, n=3.

[0009] Furthermore, there are twenty-four magnetic rods, which are equidistantly distributed within the maze-shaped channel.

[0010] Furthermore, the magnetic filter cover is fixed to the top cover by a screw, with one end of the screw fixed to the top cover and the other end fixed to the magnetic filter cover.

[0011] Furthermore, the dual-layer filtration device also includes a trolley, on which the dual-layer frame is mounted.

[0012] Furthermore, a material container is placed on the lower layer of the frame, and a power pump is installed on the upper layer. The power pump draws the slurry in the material container into the mesh filter assembly.

[0013] Furthermore, the trolley is equipped with a material pump, which is connected to the discharge port at the end of the magnetic filter assembly, and the filtered slurry in the magnetic filter assembly is discharged by the material pump.

[0014] The beneficial effects of this novel dual-layer filtration device are:

[0015] 1. This utility model sets up a two-layer structure of mesh filter component and magnetic filter component, which can filter large particles and remove metal impurities. After the slurry is filtered in the mesh filter component, it can directly enter the magnetic filter component to filter metal impurities. The operation is reliable and convenient. Only one device is needed to filter multiple types of impurities in the slurry, which can effectively improve the filtration efficiency and improve the quality of the slurry.

[0016] 2. The magnetic filter assembly of this utility model is set below the mesh filter assembly. The slurry falls into the magnetic filter assembly under the action of gravity. There is no need to set a pump between the mesh filter assembly and the magnetic filter assembly, which can save costs, improve work efficiency, and make operation reliable and convenient.

[0017] 3. The magnetic filtration assembly of this utility model is provided with n layers of magnetic filter covers, and a labyrinth-shaped channel is formed between the n layers of magnetic filter covers. The slurry is filtered by multiple magnetic rods that are equally spaced in the labyrinth-shaped channel. The slurry is filtered by passing through each magnetic rod in turn, which can greatly improve the filtration quality and greatly improve the slurry quality. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a partial sectional view of the overall structure of an embodiment of this utility model;

[0020] Figure 2 This is a cross-sectional view of the overall structure of an embodiment of this utility model;

[0021] Figure 3 This is a top view of the magnetic filter cover according to an embodiment of the present invention;

[0022] Figure 4 This is a cross-sectional view of the magnetic filter cover according to an embodiment of the present invention;

[0023] Figure 5 This is a top view of a portion of the structure of an embodiment of this utility model.

[0024] In the diagram: 1. Double-layer frame; 2. Mesh filter assembly; 21. First filter barrel; 22. Filter screen; 23. Barrel lid; 3. Magnetic filter assembly; 30. Second filter barrel; 31. Top cover; 32. Magnetic rod; 33. Magnetic filter cover; 34. Maze-shaped channel; 35. Outlet; 36. Inlet; 37. Mounting plate; 38. Screw; 39. Baffle; 4. Trolley; 5. Material holding barrel; 6. Power pump; 7. Suction pump. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0026] like Figures 1-5 The present invention provides a specific embodiment of a novel double-layer filtration device, comprising a double-layer frame 1, a mesh filter assembly 2 installed on the upper layer of the double-layer frame 1, and a magnetic filter assembly 3 installed on the lower layer of the double-layer frame 1. The mesh filter assembly 2 and the magnetic filter assembly 3 are arranged vertically, with the outlet of the mesh filter assembly 2 connected to the inlet of the magnetic filter assembly 3. By arranging the mesh filter assembly 2 and the magnetic filter assembly 3 in a two-layer structure, it is possible to first filter large particles and then filter metal impurities. The slurry passing through the mesh filter assembly 2 can directly enter the magnetic filter assembly 3 under its own gravity to filter out metal impurities. This allows for convenient and simple operation, eliminating the need for a pump between the mesh filter assembly 2 and the magnetic filter assembly 3, effectively saving costs, improving work efficiency, and ensuring reliable and convenient operation.

[0027] The mesh filter assembly 2 includes a first filter barrel 21 installed on the upper layer of the double-layer frame 1, a filter screen 22 installed inside the first filter barrel 21, and a barrel cover 23 covering the top of the first filter barrel 21. The slurry enters the first filter barrel 21 from the feed port at the upper end of the first filter barrel 21, and the filter screen 22 filters out large particles and other impurities in the slurry, thus achieving preliminary filtration of the slurry.

[0028] The magnetic filtration assembly 3 includes a second filter barrel 30 installed on the lower layer of the double-layer frame 1, a top cover 31 covering the top of the second filter barrel 30, and at least one magnetic rod 32 installed inside the second filter barrel 30. The magnetic rod 32 is mounted on the lower surface of the top cover 31 via a mounting plate 37. A magnetic filter cover 33 is installed over the magnetic rod 32 and fixed to the lower surface of the top cover 31. The magnetic filter cover 33 is fixed to the top cover 31 by a screw 38, with one end of the screw 38 fixed to the top cover 31 and the other end fixed to the magnetic filter cover 33. The slurry enters the labyrinth-shaped channel 34 from the center of the magnetic filter cover 33 and passes through the magnetic rod 32 to remove metal impurities from the slurry, thereby removing metal impurities and further improving the slurry quality.

[0029] The magnetic filter cover 33 has multiple layers, and a maze-shaped channel 34 is formed between the multiple layers of magnetic filter cover 33; the magnetic filter cover 33 has n layers, n≥2; the maze-shaped channel 34 is formed between the n layers of magnetic filter cover 33; each layer of magnetic filter cover 33 has an outlet 35, and a baffle 39 is vertically fixed on the magnetic filter cover 33. The baffle 39 is fixed at the outlet 35 of each layer of magnetic filter cover 33, separating the outlets 35 on adjacent layers of magnetic filter cover 33. The outlets 35 on adjacent layers of magnetic filter cover 33 are located on both sides of the baffle 39; when n is odd, the outlet 35 of the innermost magnetic filter cover 33 and the outlet 35 of the outermost magnetic filter cover 33 are located on the same side of the baffle 39; when n is even, the outlet 35 of the innermost magnetic filter cover 33 and the outlet 35 of the outermost magnetic filter cover 33 are located on both sides of the baffle 39. The inlet 36 is located at the center of the magnetic filter cover 33. The slurry enters the labyrinth-shaped channel 34 through the inlet 36 and flows outward along the labyrinth-shaped channel 34, passing through the labyrinth-shaped channel 34 layer by layer. Each magnetic rod 32 demagnetizes the slurry, and the slurry is discharged from the outlet 35 of the outermost magnetic filter cover 33. After passing through each magnetic rod 32 distributed in the labyrinth-shaped channel 34, each magnetic rod 32 demagnetizes and filters the slurry, which can achieve a good filtration effect, effectively improve filtration efficiency, and greatly improve filtration quality.

[0030] In this embodiment, n=3; the magnetic filter hood 33 is arranged in three layers, and baffles 39 are fixedly connected between the three layers of magnetic filter hood 33. Each layer of magnetic filter hood 33 has an outlet 35, and the three outlets 35 are all located next to the baffles 39. The outlet 35 of the innermost magnetic filter hood 33 and the outlet 35 of the middle magnetic filter hood 33 are located on opposite sides of the baffles 39, and the outlet 35 of the innermost magnetic filter hood 33 and the outlet 35 of the outermost magnetic filter hood 33 are located on opposite sides of the baffles 39. The slurry enters the center of the magnetic filter hood 33 from the inlet 36 and flows out from the outlet 35 of the innermost magnetic filter hood 33. The slurry enters the labyrinthine channel 34 between the innermost magnetic filter 33 and the middle magnetic filter 33, where it is demagnetized by magnetic rods 32 distributed between them. It then flows out from the outlet 35 of the middle magnetic filter 33 and enters the labyrinthine channel 34 between the outermost and middle magnetic filter 33, where it is demagnetized again by the magnetic rods 32 distributed between them. This multi-layer demagnetization process effectively improves the demagnetization effect. Because multiple magnetic rods 32 are distributed between adjacent magnetic filter 33 layers, the slurry undergoes demagnetization by multiple magnetic rods 32 in one pass within the labyrinthine channel 34, further enhancing the demagnetization quality and significantly improving the overall slurry quality.

[0031] In this embodiment, twenty-four magnetic rods 32 are provided, equidistantly distributed within the labyrinthine channel 34. Eight magnetic rods 32 are equidistantly distributed within the labyrinthine channel 34 between the innermost and middle layers of magnetic filter covers 33, while sixteen magnetic rods 32 are equidistantly distributed within the labyrinthine channel 34 between the middle and outermost layers of magnetic filter covers 33. The slurry flows within the labyrinthine channel 34 composed of three layers of magnetic filter covers 33. Each of the twenty-four magnetic rods 32 demagnetizes the slurry. This sequential demagnetization and filtration by the twenty-four magnetic rods 32 effectively improves demagnetization efficiency and slurry quality.

[0032] The dual-layer filtration device also includes a trolley 4, and a dual-layer frame 1 is installed on the trolley 4. In order to facilitate movement, the dual-layer frame 1 is fixed on the trolley 4, which facilitates the movement of the dual-layer filtration device and makes it easy to filter slurries located in different containers. It has strong adaptability and high ease of operation.

[0033] A material container 5 is placed on the lower layer of the frame, and a power pump 6 is installed on the upper layer. The power pump 6 draws the slurry in the material container 5 into the mesh filter assembly 2. The slurry first undergoes preliminary filtration through the mesh filter assembly 2 located above. The pre-filtered slurry enters the magnetic filter assembly 3 from the discharge port below, and then undergoes demagnetization treatment through the magnetic filter assembly 3. The mesh filter assembly 2 and the magnetic filter assembly 3 are arranged in an upper and lower two-layer structure, which can filter both large particles and metal impurities. After the slurry is filtered in the mesh filter assembly 2, it can directly enter the magnetic filter assembly 3 to filter metal impurities. The operation is reliable and convenient. Only one device is needed to filter multiple types of impurities in the slurry, which can effectively improve the filtration effect and thus improve the slurry quality.

[0034] To facilitate the discharge of the filtered slurry, a pump 7 is installed on the trolley 4. The pump 7 is connected to the discharge port at the end of the magnetic filter assembly 3, and the filtered slurry in the magnetic filter assembly 3 is discharged through the pump 7.

[0035] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A novel double-layer filtration device, characterized in that, include: A double-layer frame (1), a mesh filter assembly (2) installed on the upper layer of the double-layer frame (1), and a magnetic filter assembly (3) installed on the lower layer of the double-layer frame (1). The outlet of the mesh filter assembly (2) is connected to the inlet of the magnetic filter assembly (3). The mesh filter assembly (2) includes a first filter barrel (21), a filter screen (22) installed in the first filter barrel (21), and a barrel cover (23) covering the top of the first filter barrel (21). The magnetic filter assembly (3) includes a second filter barrel (30), a top cover (31) covering the top of the second filter barrel (30), and at least one magnetic rod (32) installed in the second filter barrel (30). The magnetic rod (32) is installed on the lower surface of the top cover (31) by a mounting plate (37). A magnetic filter cover (33) is installed on the outer sleeve of the magnetic rod (32). The magnetic filter cover (33) is fixed on the lower surface of the top cover (31).

2. The novel dual-layer filtration device according to claim 1, characterized in that, The magnetic filter cover (33) is provided with n layers, n≥2; a maze-shaped channel (34) is formed between the n layers of the magnetic filter cover (33).

3. The novel double-layer filtration device according to claim 2, characterized in that, Each layer of the magnetic filter cover (33) has an outlet (35), and a baffle (39) is vertically fixed at the outlet (35) of each layer of the magnetic filter cover (33). The outlets (35) on adjacent layers of magnetic filter covers (33) are located on both sides of the baffle (39). The inlet (36) is located at the center of the magnetic filter cover (33). The slurry enters the labyrinth channel (34) from the inlet (36) and flows outward along the labyrinth channel (34), passing through the labyrinth channel (34) layer by layer, so that each magnetic rod (32) demagnetizes the slurry, and finally the slurry is discharged from the outlet (35) of the outermost magnetic filter cover (33).

4. A novel dual-layer filtration device according to claim 3, characterized in that, When n is odd, the outlet (35) of the innermost magnetic filter (33) and the outlet (35) of the outermost magnetic filter (33) are located on the same side of the baffle (39); when n is even, the outlet (35) of the innermost magnetic filter (33) and the outlet (35) of the outermost magnetic filter (33) are located on opposite sides of the baffle (39).

5. A novel dual-layer filtration device according to claim 4, characterized in that, n=3。 6. A novel dual-layer filtration device according to claim 5, characterized in that, The magnetic rods (32) are provided in twenty-four pieces, and the twenty-four magnetic rods (32) are evenly distributed in the maze-shaped channel (34).

7. A novel dual-layer filtration device according to claim 6, characterized in that, The magnetic filter cover (33) is fixed to the top cover (31) by a screw (38), one end of the screw (38) is fixed to the top cover (31), and the other end is fixed to the magnetic filter cover (33).

8. A novel dual-layer filtration device according to claim 7, characterized in that, The dual-layer filtration device also includes a trolley (4), and the dual-layer frame (1) is mounted on the trolley (4).

9. A novel double-layer filtration device according to claim 8, characterized in that, A material container (5) is placed on the lower layer of the frame, and a power pump (6) is installed on the upper layer. The power pump (6) pumps the slurry in the material container (5) into the mesh filter assembly (2).

10. A novel dual-layer filtration device according to claim 9, characterized in that, The trolley (4) is equipped with a material pump (7), which is connected to the discharge port at the end of the magnetic filter assembly (3). The material pump (7) discharges the filtered slurry from the magnetic filter assembly (3).

Images