Coating slurry recovery device

Abstract

The utility model discloses a coating slurry recycling device, which relates to the technical field of diaphragm production, and comprises a coating die head, a material receiving groove, a material conveying pipe and a material receiving barrel, a die lip is arranged on one side of the coating die head, the material receiving groove is arranged below the die lip, one end of the material conveying pipe is connected with the bottom of the material receiving groove, the other end of the material conveying pipe is positioned above an opening of the material receiving barrel, and the material receiving barrel is connected with the die lip. The device further comprises a heating cylinder and a filtering structure, the heating cylinder is arranged on the outer side of the conveying pipe in a sleeving mode, and the filtering structure is arranged at the end, away from the receiving groove, of the conveying pipe. The heating cylinder continuously exchanges heat with the surface of the conveying pipe, so that the temperature of slurry in the conveying pipe is increased, the phenomenon that the slurry is easy to coagulate is avoided, the arc-shaped filter cover is used for fully filtering impurities in the slurry, the problem that the slurry is not uniformly coated on the surface of a diaphragm due to the mixed impurities when the slurry is used for the second time is avoided, and the service life of the diaphragm is prolonged. And the recovery quality of the coating slurry is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm production, in particular to a coating slurry recovery device. Background Art

[0002] Coating is one of the important processes in the production of lithium-ion batteries. The coating production process is to evenly coat the slurry on the diaphragm through the coating die head in the coating equipment, and form a solid material with a certain thickness and size after drying in an oven. In order to avoid waste, it is often necessary to recycle the used coating slurry.

[0003] A Chinese patent with authorization announcement number CN220195400U discloses a slurry recycling device, including a recycling slurry receiving box and a waste material receiving box. The waste material receiving box can switch between an idle state and a receiving state according to the type of coating slurry discharged from the die lip. When the coating slurry is a mixed slurry, the waste material receiving box in the receiving state can collect the non-recyclable part of the mixed slurry, and the remaining recyclable part continues to be recycled and reused by the recycling slurry receiving box, avoiding a small amount of non-recyclable part from mixing into the recycling slurry receiving box to generate a large amount of waste, thereby reducing the total amount of waste.

[0004] In the above technical scheme, although the slurry can be recycled, the slurry will be contaminated by external substances and produce impurities when it is coated on the surface of the diaphragm. When the impurities and slurry are recycled through the recovery pipeline, the slurry is easy to coagulate with the impurities. When it is used for the second time, the agglomerated slurry and impurities will cause the slurry to be unevenly coated on the surface of the diaphragm, thereby affecting the use effect of the recovered coating slurry. Utility Model Content

[0005] The utility model aims to provide a coating slurry recovery device to solve the technical problem of poor slurry recovery quality in the prior art.

[0006] The technical problem to be solved by the utility model can be achieved through the following technical solutions:

[0007] A coating slurry recovery device comprises a coating die head, a material receiving trough, a material delivery pipe and a material receiving barrel, wherein a die lip is arranged on one side of the coating die head, the material receiving trough is arranged below the die lip, one end of the material delivery pipe is connected to the bottom of the material receiving trough, and the other end is located above the opening of the material receiving barrel, and further comprises:

[0008] A heating cylinder, wherein the heating cylinder is sleeved on the outside of the material conveying pipe;

[0009] A filtering structure, wherein the filtering structure is arranged at one end of the feed pipe away from the material receiving trough, the filtering structure comprises a connecting ring, a clamping ring, an arc-shaped filter cover and a connecting structure, the connecting ring is fixed to one end of the feed pipe, a clamping groove is provided on the side of the connecting ring away from the feed pipe, the clamping ring is clamped in the inner side of the clamping groove, an arc-shaped filter cover is provided on the inner side of the clamping ring, and the connecting ring is connected to the clamping ring through the connecting structure.

[0010] As a further solution of the utility model: the connecting structure is provided with two groups, and the two groups of connecting structures include an insert rod, a spring, and a pull ring. The two sides of the connecting ring are respectively penetrated by an insert rod and inserted therein, and slots are respectively provided at both ends of the clamping ring. The ends of the two insert rods close to the clamping ring are respectively inserted into the corresponding slots, and the other ends are connected to the pull ring. A spring is sleeved on the outside of the insert rod.

[0011] As a further solution of the utility model: the side of the arc-shaped filter cover close to the inside of the feed pipe is a convex arc surface end.

[0012] As a further solution of the utility model: a sealing groove is formed at one end of the connecting ring close to the clamping ring, and a sealing convex strip matching the sealing groove is provided on the clamping ring.

[0013] As a further solution of the utility model: the heating cylinder is connected between the material receiving trough and the connecting ring.

[0014] As a further solution of the utility model: one end of the clamping ring is connected to a limiting block, a limiting groove corresponding to the limiting block is opened on the inner side of the connecting ring, and the limiting block is clamped with the limiting groove.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model gathers slurry from a receiving trough and transports it through a feeding pipe, and finally flows into a receiving barrel after being filtered through an arc-shaped filter cover at the bottom of the feeding pipe, thereby realizing the recovery of the coating slurry. When the slurry passes through the feeding pipe, the heating cylinder is energized, so that the heating cylinder continuously exchanges heat with the surface of the feeding pipe, and at the same time, the slurry temperature in the feeding pipe is also increased, thereby preventing the slurry from easily condensing, and effectively ensuring the recovery quality of the coating slurry. The arc-shaped filter cover is used to fully filter out impurities in the slurry, thereby preventing the mixed impurities from causing uneven coating of the slurry on the diaphragm surface when the recycled slurry is used for the second time, and the arc-shaped filter cover is not easy to be blocked, thereby improving the filtration efficiency.

[0017] 2. The utility model pulls the pull rings on both sides so that the insertion rod moves to both sides until there is no obstruction in the slot. At the same time, the spring is compressed, and then the limit block is aligned with the limit slot so that the clamping ring is inserted into the slot. The pull ring is released, and due to the rebound force of the spring, the insertion rod is inserted into the slot, so that the arc filter cover is fixed. The pull ring is pulled again to realize the disassembly of the arc filter cover, which is convenient for cleaning impurities on the upper side of the arc filter cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the material conveying pipe and the heating cylinder in the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the material delivery cylinder and the arc-shaped filter cover in the utility model;

[0022] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 5 It is a schematic diagram of the coordinated connection structure of the limit block and the connecting ring in the utility model.

[0024] In the figure: 1. coating die head; 2. die lip; 3. material receiving trough; 4. material delivery pipe; 5. heating cylinder; 6. connecting ring; 7. clamping groove; 8. clamping ring; 9. arc filter cover; 10. slot; 11. plug rod; 12. spring; 13. pull ring; 14. sealing groove; 15. sealing convex strip; 16. material receiving barrel; 17. limit block; 18. limit groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-Figure 5As shown, a coating slurry recovery device includes a coating die head 1, a receiving trough 3, a feeding pipe 4 and a receiving barrel 16. A die lip 2 is provided on one side of the coating die head 1. The receiving trough 3 is provided below the die lip 2 and is used to recover the coating slurry discharged from the die lip 2. One end of the feeding pipe 4 is connected to the bottom of the receiving trough 3, and the other end is located above the opening of the receiving barrel 16. The recovery device also includes a heating cylinder 5 and a filtering structure. The heating cylinder 5 is sleeved on the outside of the feeding pipe 4 and is used to achieve heat exchange on the surface of the feeding pipe 4.

[0027] The filtering structure is arranged at the end of the feeding pipe 4 away from the receiving trough 3. Figure 3 As shown, the filtering structure includes a connecting ring 6, a clamping ring 8, an arc-shaped filter cover 9 and a connecting structure. The connecting ring 6 is fixed to one end of the feed pipe 4. A clamping groove 7 is provided on the side of the connecting ring 6 away from the feed pipe 4. The clamping ring 8 is clamped in the inner side of the clamping groove 7. An arc-shaped filter cover 9 is fixed on the inner side of the clamping ring 8. The arc-shaped filter cover 9 is used to filter impurities in the recovered slurry. The connecting ring 6 is connected to the clamping ring 8 through the connecting structure.

[0028] In some specific embodiments, such as Figure 4 As shown, in order to facilitate the rapid disassembly of the arc-shaped filter cover 9, two groups of connecting structures are provided, and both groups of connecting structures include an insert rod 11, a spring 12, and a pull ring 13. The two sides of the connecting ring 6 are respectively penetrated by an insert rod 11, and slots 10 are respectively provided at both ends of the clamping ring 8. The ends of the two insert rods 11 close to the clamping ring 8 are respectively plugged into the corresponding slots 10, and the other ends are connected to the pull ring 13. A spring 12 is sleeved on the outside of the insert rod 11.

[0029] Pull the pull rings 13 on both sides so that the insertion rod 11 moves to both sides until there is no obstruction in the slot 7. At the same time, the spring 12 is compressed, and then the limit block 17 is aligned with the limit slot 18 so that the snap ring 8 is inserted into the slot 7. Release the pull ring 13. Due to the rebound force of the spring 12, the insertion rod 11 is inserted into the slot 10, so that the arc filter cover 9 is fixed. The pull ring 13 can be pulled again to realize the disassembly of the arc filter cover 9, which is convenient for cleaning the impurities on the upper side of the arc filter cover 9.

[0030] In some specific embodiments, such as Figure 3 As shown, since the general filtering structure is relatively flat, impurities can easily cover the filtering structure, resulting in the problem of clogging of the filtering structure. In order to avoid the problem that impurities can easily completely cover the arc filter cover 9, the side of the arc filter cover 9 close to the inside of the feed pipe 4 is a raised arc surface end. The height of the arc filter cover 9 is high in the center and gradually becomes lower on the outside, protruding upward as a whole, so that impurities in the slurry can easily accumulate on the side of the lower part of the arc filter cover 9 along the shape of the arc filter cover 9.

[0031] In some specific embodiments, in order to prevent the slurry from entering the gap between the clamping ring 8 and the clamping groove 7, a sealing groove 14 is opened at one end of the connecting ring 6 close to the clamping ring 8, and a sealing ridge 15 matching the sealing groove 14 is provided on the clamping ring 8, and the sealing groove 14 and the sealing ridge 15 are sealed and connected.

[0032] In some specific embodiments, such as Figure 2 As shown, in order to prevent the slurry from coagulating when passing through the feed pipe 4, the heating cylinder 5 is connected between the material receiving trough 3 and the connecting ring 6.

[0033] In some specific embodiments, such as Figure 5 As shown, in order to facilitate the quick connection between the insertion rod 11 and the slot 10, one end of the clamping ring 8 is connected to the limiting block 17, and a limiting groove 18 corresponding to the limiting block 17 is opened on the inner side of the connecting ring 6. When the limiting block 17 and the limiting groove 18 are engaged and positioned, the position of the slot 10 corresponds to the position of the insertion rod 11.

[0034] When the slurry falls on the receiving trough 3, the slurry is gathered by the receiving trough 3 and transported through the feeding pipe 4, and finally filtered through the arc-shaped filter cover 9 at the bottom of the feeding pipe 4 and flows into the receiving barrel 16 to realize the recovery of the coating slurry. When the slurry passes through the feeding pipe 4, the heating cylinder 5 is energized, so that the heating cylinder 5 continuously exchanges heat with the surface of the feeding pipe 4, thereby increasing the temperature of the feeding pipe 4 and also increasing the temperature of the slurry in the feeding pipe 4, thereby avoiding the slurry from easily coagulating and effectively ensuring the recovery quality of the coating slurry. The arc-shaped filter cover 9 is used to fully filter out impurities in the slurry to avoid the problem of uneven slurry coating on the surface of the diaphragm due to mixed impurities when the recovered slurry is used for the second time. The height of the arc-shaped filter cover 9 is high in the center and gradually becomes lower on the outside, and the whole protrudes upward, so that the impurities in the slurry are easily accumulated on the side position of the lower part of the arc-shaped filter cover 9 along the shape of the arc-shaped filter cover 9, and the impurities are not easy to completely cover the arc-shaped filter cover 9, so that the arc-shaped filter cover 9 is not easy to be blocked, thereby improving the filtering efficiency.

[0035] In order to facilitate the understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is briefly described in combination with specific application scenarios:

[0036] When the slurry falls on the receiving trough 3, the slurry is gathered by the receiving trough 3 and transported through the feeding pipe 4, and finally filtered through the arc-shaped filter cover 9 at the bottom of the feeding pipe 4 and flows into the receiving barrel 16 to realize the recovery of the coating slurry. When the slurry passes through the feeding pipe 4, the heating cylinder 5 is energized, so that the heating cylinder 5 continuously exchanges heat with the surface of the feeding pipe 4, thereby increasing the temperature of the feeding pipe 4 and also increasing the temperature of the slurry in the feeding pipe 4, thereby avoiding the slurry from easily coagulating and effectively ensuring the recovery quality of the coating slurry. The arc-shaped filter cover 9 is used to fully filter out impurities in the slurry to avoid the problem of uneven slurry coating on the surface of the diaphragm due to mixed impurities when the recovered slurry is used for the second time. The height of the arc-shaped filter cover 9 is high in the center and gradually becomes lower on the outside, and the whole protrudes upward, so that the impurities in the slurry are easily accumulated on the side position of the lower part of the arc-shaped filter cover 9 along the shape of the arc-shaped filter cover 9, and the impurities are not easy to completely cover the arc-shaped filter cover 9, so that the arc-shaped filter cover 9 is not easy to be blocked, thereby improving the filtering efficiency.

[0037] Pull the pull rings 13 on both sides so that the insertion rod 11 moves to both sides until there is no obstruction in the slot 7. At the same time, the spring 12 is compressed, and then the limit block 17 is aligned with the limit slot 18 so that the snap ring 8 is inserted into the slot 7. Release the pull ring 13. Due to the rebound force of the spring 12, the insertion rod 11 is inserted into the slot 10, so that the arc filter cover 9 is fixed. The pull ring 13 can be pulled again to realize the disassembly of the arc filter cover 9, which is convenient for cleaning the impurities on the upper side of the arc filter cover 9.

[0038] Several embodiments of the utility model are described in detail above, but the embodiments of the utility model are not limited to them and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A coating slurry recovery device, comprising a coating die head (1), a receiving trough (3), a feed pipe (4) and a receiving barrel (16), wherein a die lip (2) is arranged on one side of the coating die head (1), the receiving trough (3) is arranged below the die lip (2), one end of the feed pipe (4) is connected to the bottom of the receiving trough (3), and the other end is located above the opening of the receiving barrel (16), characterized in that: Also includes: A heating cylinder (5), wherein the heating cylinder (5) is sleeved on the outside of the material conveying pipe (4); A filtering structure is provided at one end of a feed pipe (4) away from a receiving trough (3), the filtering structure comprising a connecting ring (6), a clamping ring (8), an arc-shaped filtering cover (9) and a connecting structure, the connecting ring (6) being fixed to one end of the feed pipe (4), a clamping groove (7) being provided on a side of the connecting ring (6) away from the feed pipe (4), the clamping ring (8) being clamped in the inner side of the clamping groove (7), an arc-shaped filtering cover (9) being provided on the inner side of the clamping ring (8), and the connecting ring (6) being connected to the clamping ring (8) through the connecting structure.

2. A coating slurry recovery device according to claim 1, characterized in that: The connection structure is provided in two groups, and both groups of the connection structure include an insertion rod (11), a spring (12), and a pull ring (13); the two sides of the connection ring (6) are respectively penetrated by an insertion rod (11) and inserted therein; the two ends of the clamping ring (8) are respectively provided with slots (10); one end of the two insertion rods (11) close to the clamping ring (8) is respectively inserted into the corresponding slots (10), and the other end is connected to the pull ring (13); the outer side of the insertion rod (11) is provided with a spring (12).

3. A coating slurry recovery device according to claim 1, characterized in that: The side of the arc-shaped filter cover (9) close to the inside of the feed pipe (4) is a convex arc surface end.

4. A coating slurry recovery device according to claim 1, characterized in that: A sealing groove (14) is formed at one end of the connecting ring (6) close to the clamping ring (8), and a sealing convex strip (15) matching with the sealing groove (14) is provided on the clamping ring (8).

5. A coating slurry recovery device according to claim 1, characterized in that: The heating cylinder (5) is connected between the material receiving trough (3) and the connecting ring (6).

6. A coating slurry recovery device according to claim 1, characterized in that: One end of the clamping ring (8) is connected to a limiting block (17), a limiting groove (18) corresponding to the limiting block (17) is formed on the inner side of the connecting ring (6), and the limiting block (17) is clamped with the limiting groove (18).

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