Novel chilling system device

Abstract

The utility model relates to the technical field of lithium battery diaphragm manufacturing, and particularly discloses a novel chilling system device which comprises a die head, a cooling water tank arranged below the die head, a water spraying device arranged between the cooling water tank and the die head, the water spraying device comprises a water spraying pipe, a filter element arranged in the water spraying pipe in a matched manner, and a filter bag box arranged outside the water spraying pipe, and a filter bag is arranged in the filter bag box. The casting piece pre-cooling device can realize pre-cooling operation on a casting piece, so that defects on the surface of the casting piece are effectively prevented, the surface of the casting piece is smooth and flat, and the yield of production is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery separator manufacturing, in particular to a novel quenching system device. Background Art

[0002] The production process of lithium battery separators is mainly divided into two types: dry method and wet method. The common process flow includes: extrusion of the cast film by an extruder, forming of the cast film, stretching, heat treatment, winding, slitting, etc. Among them, the forming part of the cast film mainly cools the cast film through cooling water and a quenching roller. Since the cast film coming down from the die head is very soft before and during cooling, if there are bubbles generated by high temperature in the cooling water tank or impurities in the water, it will form appearance defects of the lithium battery separator. Especially for separators with a relatively fast production line speed or a relatively thin production specification, it will cause the phenomenon of uneven film thickness, and whether the thickness is uniform can directly affect the qualified rate of lithium battery films.

[0003] Therefore, we propose a novel quenching system device to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and a novel quenching system device is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A novel quenching system device includes a die head. It is characterized in that a cooling water tank is arranged below the die head, and a water spraying device is arranged between the cooling water tank and the die head. The water spraying device includes a water spraying pipe, a filter element is installed inside the water spraying pipe in a matching manner, a filter bag box is arranged outside the water spraying pipe, and a filter bag is installed inside the filter bag box.

[0007] Preferably, the water spraying pipe is supported and fixed by a bracket, the filter bag box is connected with a water inlet pipe, and a row of small holes for water flow to pass through is opened on one side of the water spraying pipe.

[0008] Preferably, the pore diameter of the filter bag in the filter bag box is larger than the pore diameter of the filter element inside the water spraying pipe.

[0009] Preferably, a quenching roller is arranged above the cooling water tank, the bottom of the quenching roller is located inside the cooling water tank, and a peeling roller is arranged on the side of the quenching roller.

[0010] Preferably, a cooling water inlet and a cooling water quick discharge outlet are arranged at the bottom of the cooling water tank in a matching manner.

[0011] Preferably, the cooling water tank is sequentially connected with a first shell and a second shell through a pipeline, a liquid extraction pump is installed on the pipeline in a matching manner, filter cotton is installed inside the first shell, an oil-water separator is installed inside the second shell, and the oil-water separator is connected with a filter through a pipeline.

[0012] Preferably, the filter is connected to the cooling water inlet through a pipeline.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] By providing a water spraying device, the water spraying device enables the cooling water to flow down slowly and naturally, and enables the water flow to be sprayed onto the casting sheet as slowly as possible, ensuring that the water flow impact on the surface of the casting sheet can be eliminated, preventing defects and uneven thickness on the surface of the casting sheet. Finally, the casting sheet is pre-cooled without affecting the casting sheet. After pre-cooling the casting sheet through the water spraying device, the hardness of the casting sheet is effectively improved, which is beneficial to preventing the formation of surface defects. And the pre-cooled casting sheet can reduce the adhesion of surface stains, and the obtained casting sheet has a smooth and flat surface, effectively improving the qualified rate. At the same time, the cooling water will enter the lower cooling water tank to participate in the cooling water circulation, effectively reducing the energy consumption. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is the front view of the present utility model;

[0017] Figure 2 It is the side schematic view of the water spraying device of the present utility model;

[0018] In the figure: 1, die head; 2, chill roll; 3, stripping roll; 4, filter cotton; 5, oil-water separator; 6, filter; 7, cooling water inlet; 8, cooling water quick discharge port; 9, water spraying device; 10, cooling water tank; 11, support; 12, water spraying pipe; 13, filter bag box; 14, water inlet pipe. Detailed Embodiments

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0020] In the description of the present utility model, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating orientation or positional relationships are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0021] Referring to Figure 1 and Figure 2 A novel chill system device includes a die head 1, and the die head 1 is used for extruding a cast sheet. A cooling water tank 10 is provided below the die head 1, and a water spraying device 9 is provided between the cooling water tank 10 and the die head 1. The water spraying device 9 includes a water spraying pipe 12, and a filter element is installed inside the water spraying pipe 12 in a matching manner. There is a filter bag box 13 outside the water spraying pipe 12, and a filter bag is installed inside the filter bag box 13. The water spraying device 9 can be docked with an external cooling water pipe. A row of small holes through which water can flow is opened on one side of the water spraying pipe 12 of the water spraying device 9, and water can flow through.

[0022] The water spraying pipe 12 is supported and fixed by a bracket 11. The filter bag box 13 is connected with a water inlet pipe 14. The water inlet pipe 14 is the external cooling water pipe used for docking with the water spraying device 9. The water inlet pipe 14 is used for connecting with an external pipe and is used to flow cooling water into the filter bag box 13. After the water flow is filtered by the filter bag inside the filter bag box 13, it enters the water spraying pipe 12. The water pressure of the cooling water inside the water inlet pipe 14 can be adjusted.

[0023] As a technical optimization scheme of the present utility model, the water flow will directly spray onto the cast sheet below the die head 1 through the small holes from the opening side of the water spraying pipe 12 for pre-cooling before the cast sheet enters the cooling water tank 10. The amount of water sprayed can be controlled by adjusting the water inflow and water pressure in the water spraying pipe 12. The pore diameter of the filter holes of the filter bag in the filter bag box 13 is larger than the pore diameter of the filter element inside the water spraying pipe 12. The filter bag of the filter bag box 13 can filter most of the impurities in the water flow, and the filter element of the water spraying pipe 12 can filter some fine impurities in the water flow, while slowing down the flow rate of the water flow, reducing the impact force of the water flow on the surface of the cast sheet, and making the water flow disperse as much as possible.

[0024] As a technical optimization scheme of the present utility model, the filter bag of the filter bag box 13 and the filter element inside the water spraying pipe 12 can slow down the water flow rate and the impact force brought by the water flow. The size of the water flow in the water spraying pipe 12 can be adjusted by pressure, and the water pressure can be adjusted according to the on-site requirements, so as to control the flow rate of the water flow, prevent any defects from being caused to the surface of the cast sheet, and make the water flow spray onto the cast sheet as slowly as possible.

[0025] As a technical optimization solution of the present utility model, a chill roll 2 is provided above the cooling water tank 10. The bottom of the chill roll 2 is located inside the cooling water tank 10, and a stripping roll 3 is provided on the side of the chill roll 2. The chill roll 2 can play a guiding role, enabling the cast sheet to be immersed in the cooling water tank 10, ensuring that both sides of the cast sheet can be cooled, and effectively reducing the situation where impurities in the water adhere to the surface of the cast sheet away from the chill roll 2 due to one-sided cooling and relatively high temperature.

[0026] As a technical optimization solution of the present utility model, a cooling water inlet 7 and a cooling water quick discharge port 8 are correspondingly provided at the bottom of the cooling water tank 10. The cooling water inlet 7 is used for water inlet, and the cooling water quick discharge port 8 can perform quick drainage operation.

[0027] As a technical optimization solution of the present utility model, the cooling water tank 10 is sequentially connected with a first housing and a second housing through pipelines. A liquid extraction pump is correspondingly installed on the pipeline. A filter cotton 4 is installed inside the first housing, an oil-water separator 5 is installed inside the second housing, and the oil-water separator 5 is connected with a filter 6 through a pipeline.

[0028] As a technical optimization solution of the present utility model, the filter 6 is connected with the cooling water inlet 7 through a pipeline. The filter cotton 4, the oil-water separator 5, the filter 6 and the cooling water inlet 7 achieve the effect of cooling water circulation.

[0029] In the present utility model, the working principle of the device is as follows:

[0030] The cast sheet is extruded through the die head 1, and first passes through the spraying of the water spraying device 9 to achieve uniform and slow one-sided cooling, and is pre-cooled before the cast sheet enters the cooling water tank 10. The cooling water flows into the lower cooling water tank 10 along with the cast sheet. As the cast sheet continues to move downward, the cast sheet adheres to the chill roll 2 to cool the other side of the cast sheet, and at the same time the cast sheet enters the cooling water tank 10 for overall cooling. The cooled cast sheet finally enters the stripping roll 3 and undergoes a stripping operation, and finally enters the subsequent process.

[0031] When the water flow passes through the water spraying device 9, the water flow passes through the filter bag of the filter bag box 13 and the filter element of the water spraying pipe 12 in sequence. Since the aperture of the filter screen of the filter bag box 13 is larger than that of the filter element of the water spraying pipe 12, the filter bag of the filter bag box 13 can filter most of the impurities in the water flow. The filter element in the water spraying pipe 12 can filter some fine impurities in the water flow, while slowing down the flow rate of the water flow, reducing the impact force of the water flow on the surface of the casting sheet, and at the same time making the water flow disperse as much as possible. At the same time, the water flow rate of the water spraying device 9 can be adjusted by water pressure to prevent any defects from being caused to the surface of the casting sheet. During use, according to the actual production needs, the size of the incoming water flow is adjusted in a timely manner, and the casting sheet is pre-cooled without affecting the casting sheet. Let the water flow slowly and naturally flow to the surface of the casting sheet, initially cool the casting sheet, accelerate the cooling and crystallization of the casting sheet, and improve the hardness of the casting sheet.

[0032] The casting sheets of the existing device are mainly cooled in the water tank. During the cooling process, bubbles will be generated in the cooling water due to the increase in temperature. After the bubbles in the water collide with the casting sheet, they will cause slight defects on the surface of the soft casting sheet. During the subsequent stretching process, the surface of the stretched film will have uneven thickness, resulting in a large difference in thickness. And this device can perform pre-cooling, so that the hardness of the casting sheet is increased, thereby effectively avoiding the phenomenon of uneven thickness caused by the collision of bubbles. At the same time, it can effectively reduce the situation that some impurities in the water will adhere to the surface of the casting sheet far from the chill roll 2 because the casting sheet is cooled on one side and the temperature of the surface of the casting sheet is relatively high.

[0033] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A novel chill system device, comprising a die head (1), characterized in that, A cooling water tank (10) is provided below the die head (1). A water spraying device (9) is provided between the cooling water tank (10) and the die head (1). The water spraying device (9) includes a water spraying pipe (12). A filter element is installed inside the water spraying pipe (12) in a matching manner. There is a filter bag box (13) outside the water spraying pipe (12), and a filter bag is installed inside the filter bag box (13).

2. A novel chilling system device according to claim 1, characterized in that, The water spraying pipe (12) is supported and fixed by a bracket (11). The filter bag box (13) is connected with a water inlet pipe (14). A row of small holes through which water can flow is opened on one side of the water spraying pipe (12).

3. A novel chill system device according to claim 1, characterized in that, The pore diameter of the filter bag in the filter bag box (13) is larger than the pore diameter of the filter element inside the water spraying pipe (12).

4. A novel chilling system device according to claim 1, characterized in that, A chill roll (2) is provided above the cooling water tank (10). The bottom of the chill roll (2) is located inside the cooling water tank (10). A peeling roll (3) is provided on the side of the chill roll (2).

5. A novel chilling system device according to claim 1, wherein, A cooling water inlet (7) and a cooling water quick discharge outlet (8) are provided at the bottom of the cooling water tank (10) in a matching manner.

6. A novel chilling system device according to claim 5, characterized in that, The cooling water tank (10) is sequentially connected with a first housing and a second housing through a pipeline. A liquid extraction pump is installed on the pipeline in a matching manner. Filter cotton (4) is installed inside the first housing, and an oil-water separator (5) is installed inside the second housing. The oil-water separator (5) is connected with a filter (6) through a pipeline.

7. A novel chilling system device according to claim 6, wherein, The filter (6) is connected with the cooling water inlet (7) through a pipeline.

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