Clearance type coating valve mechanism

Abstract

The utility model discloses a clearance type coating valve mechanism which comprises a backflow valve body and a coating valve body which are arranged side by side, a backflow inner cavity is arranged in the backflow valve body, one side of the backflow valve body is connected with a feeding pipeline, the other side of the backflow valve body is provided with a backflow discharging port, and the upper end of the backflow valve body is connected with a backflow pipeline. A backflow pipeline is arranged at the upper end of the coating valve body, a backflow diaphragm valve is arranged on the backflow pipeline, a coating inner cavity is formed in the coating valve body, a coating feeding port is formed in one side of the coating valve body, a coating discharging pipeline is connected to the upper end of the coating valve body, and a coating diaphragm valve is arranged on the coating discharging pipeline. According to the clearance type coating valve mechanism disclosed by the utility model, the coating diaphragm valves of the backflow diaphragm valve are respectively arranged on the backflow pipeline and the coating discharge pipeline, so that the flow in the backflow inner cavity and the coating inner cavity can be controlled, and the working pressure of slurry is ensured to be within a set pressure range during clearance coating; and the coating valve mechanism is simple in overall structure and stable in performance.

Description

Technical Field

[0001] The utility model relates to the technical field of coating machines, in particular to an intermittent coating valve mechanism. Background Art

[0002] Coating is an essential process in the production of lithium-ion batteries and is also a key process directly affecting various performances such as the safety, capacity, and consistency of the batteries. Coating is to evenly, continuously or intermittently coat the prepared paste-like viscous slurry on the substrate, ensuring the thickness consistency at each coating position and controlling the coating thickness within the tolerance range required by the process. The coating of the electrode sheet is not continuous. According to needs, some electrode sheets are coated intermittently, and some positions do not need to be coated with the coating liquid. The intermittent coating is controlled by an intermittent coating valve.

[0003] The existing intermittent coating valve mechanism for coating lithium battery electrode sheets generally includes a reflux valve body and a coating valve body. Since the inner cavity spaces of the reflux valve body and the coating valve body are small, the inner cavities of the reflux valve body and the coating valve body often generate large pressure fluctuations due to the increase or decrease in the volume of the slurry, and the slurry is prone to vortex formation. During intermittent coating, the electrode sheet is extremely prone to the phenomenon of sudden thickness change at the head and tail, resulting in a thicker head and a thinner tail of the electrode sheet, affecting the coating effect of the electrode sheet. Therefore, a coating valve mechanism with adjustable volume has been designed on the market. A rubber membrane is provided at the top of the inner cavities of the reflux valve body and the coating valve body, and the volume adjustment is achieved through the deformation of the rubber membrane. For example, in Chinese Patent: 2022102693358. However, the setting of this rubber membrane will complicate the overall structure of the coating valve mechanism, so the intermittent coating valve mechanism still needs to be improved. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an intermittent coating valve mechanism with a simple structure that ensures the working pressure and performance.

[0005] To solve the above technical problems, the utility model can adopt the following technical solutions to achieve:

[0006] An intermittent coating valve mechanism includes a reflux valve body and a coating valve body arranged side by side. The inside of the reflux valve body has a reflux inner cavity. An inlet pipeline is connected to one side of the reflux valve body, and a reflux outlet is provided on the other side. The upper end of the reflux valve body is connected to a reflux pipeline, and a reflux diaphragm valve is provided on the reflux pipeline. The inlet pipeline, the reflux outlet, and the reflux pipeline are all communicated with the reflux inner cavity. A reflux driving unit is also connected to the bottom of the reflux valve body;

[0007] The interior of the coating valve body has a coating inner cavity. On one side of the coating valve body, there is a coating feed port connected to the return discharge port. The upper end of the coating valve body is connected to a coating discharge pipeline, and a coating diaphragm valve is provided on the coating discharge pipeline. The coating feed port and the coating discharge pipeline are both communicated with the coating inner cavity. At the bottom of the coating valve body, there is also a coating driving unit connected.

[0008] In one embodiment, the return driving unit includes a return fixing seat, a return motor, a return cam, a return slider, and a return valve rod. The return fixing seat is located below the return valve body. The return motor is installed on the return fixing seat, and the output end is connected to the return cam. The return slider is movably arranged on the return fixing seat and is connected to the return cam. The return motor drives the return cam to rotate, and the return cam thereby drives the return slider to slide up and down along the return fixing seat. One end of the return valve rod is connected to the return slider, and the other end extends from the bottom of the return valve body into the return inner cavity, and a return valve core is provided at the extending end.

[0009] In one embodiment, the coating driving unit includes a coating fixing seat, a coating motor, a coating cam, a coating slider, and a coating valve rod. The coating fixing seat is located below the coating valve body. The coating motor is installed on the coating fixing seat, and the output end is connected to the coating cam. The coating slider is movably arranged on the coating fixing seat and is connected to the coating cam. The coating motor drives the coating cam to rotate, and the coating cam thereby drives the coating slider to slide up and down along the coating fixing seat. One end of the coating valve rod is connected to the coating slider, and the other end extends from the bottom of the coating valve body into the coating inner cavity, and a coating valve core is provided at the extending end.

[0010] In one embodiment, between the feed pipeline and the return valve body, between the return pipeline and the return valve body, between the return discharge port and the coating feed port, and between the coating discharge pipeline and the coating valve body, a clamp is used for connection, and a sealing ring is provided at the connection.

[0011] In one embodiment, a protective cover is provided outside the return motor and the coating motor.

[0012] In one embodiment, a cooling fan is provided inside the protective cover.

[0013] In one embodiment, both the return motor and the coating motor are servo motors.

[0014] In one embodiment, both the return diaphragm valve and the coating diaphragm valve are electric diaphragm valves. Beneficial effects

[0015] The gap coating valve mechanism of the present utility model controls the flow rates in the reflux cavity and the coating cavity respectively by setting a reflux diaphragm valve on the reflux pipeline and a coating diaphragm valve on the coating discharge pipeline when coating the electrode plate. This ensures that the working pressure of the slurry during coating is within the set pressure range. By directly setting the reflux diaphragm valve and the coating diaphragm valve, the overall structure of the coating valve mechanism is simple. And by setting a cooling fan in the protective cover, the cooling fan dissipates heat when the reflux motor and the coating motor are working, thereby improving the stability of the coating valve mechanism. Description of the Drawings

[0016] Figure 1 Structural schematic of the gap coating valve mechanism of the present utility model Figure 1 ;

[0017] Figure 2 Cross-section of the gap coating valve mechanism of the present utility model Figure 1 ;

[0018] Figure 3 Cross-section of the gap coating valve mechanism of the present utility model Figure 2 ;

[0019] Figure 4 Cross-section of the gap coating valve mechanism of the present utility model Figure 3 ;

[0020] Figure 5 Structural schematic of the gap coating valve mechanism of the present utility model Figure 2 。

[0021] 100, reflux valve body; 110, reflux cavity; 120, feed pipeline; 130, reflux discharge port; 140, reflux pipeline;

[0022] 200, coating valve body; 210, coating cavity; 220, coating feed port; 230, coating discharge pipeline;

[0023] 300, reflux diaphragm valve;

[0024] 400, reflux drive unit; 410, reflux fixing seat; 420, reflux motor; 430, reflux cam; 440, reflux slider; 450, reflux valve stem; 460, reflux valve core;

[0025] 500, coating diaphragm valve;

[0026] 600, coating drive unit; 610, coating fixing seat; 620, coating motor; 630, coating cam; 640, coating slider; 650, coating valve stem; 660, coating valve core;

[0027] 700, Clamp; 710, Sealing Ring;

[0028] 800, Protective Cover; 810, Cooling Fan. Detailed Embodiment

[0029] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0030] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be intermediate elements at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used herein in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] Please refer to Figures 1 to 4, A gap coating valve mechanism, including a reflux valve body 100 and a coating valve body 200 arranged side by side. The inside of the reflux valve body 100 has a reflux inner cavity 110. On one side of the reflux valve body 100, a feed pipe 120 is connected, and on the other side, a reflux discharge port 130 is provided. The upper end of the reflux valve body 100 is connected with a reflux pipe 140, and a reflux diaphragm valve 300 is provided on the reflux pipe 140. The feed pipe 120, the reflux discharge port 130, and the reflux pipe 140 are all communicated with the reflux inner cavity 110. At the bottom of the reflux valve body 100, a reflux driving unit 400 is also connected. The inside of the coating valve body 200 has a coating inner cavity 210. On one side of the coating valve body 200, a coating feed port 220 connected to the reflux discharge port 130 is provided. The upper end of the coating valve body 200 is connected with a coating discharge pipe 230, and a coating diaphragm valve 500 is provided on the coating discharge pipe 230. The coating feed port 220 and the coating discharge pipe 230 are both communicated with the coating inner cavity 210. At the bottom of the coating valve body 200, a coating driving unit 600 is also connected.

[0033] Specifically, in this embodiment, both the feed pipe 120 and the reflux pipe 140 of the reflux valve body 100 are connected to a feeding device, and the feeding device is used to supply the slurry required for coating. The coating discharge pipe 230 of the coating valve body 200 is connected to a coating device, and the coating device is used to coat the slurry onto the electrode sheet. When coating the electrode sheet, the slurry enters the reflux inner cavity 110 of the reflux valve body 100 through the feed pipe 120, and the reflux driving unit 400 closes the reflux inner cavity 110 and the reflux pipe 140. At this time, the slurry in the reflux inner cavity 110 can only flow along the direction of the reflux discharge port 130 and cannot flow into the reflux pipe 140. Since the reflux discharge port 130 is communicated with the coating feed port 220 of the coating valve body 200, the slurry will flow from the reflux discharge port 130 into the coating feed port 220, and then from the coating feed port 220 into the coating inner cavity 210. The coating driving unit 600 opens the coating discharge pipe 230 and the coating inner cavity 210, and the slurry in the coating inner cavity 210 will flow out along the coating discharge pipe 230 to the coating device, thereby realizing the coating operation on the electrode sheet. Since a coating diaphragm valve 500 is provided on the coating discharge pipe 230, and the coating diaphragm valve 500 is an electric diaphragm valve, the electric diaphragm valve has precise control ability and fast response speed, so the flow rate of the slurry during electrode coating can be controlled, thereby ensuring that the working pressure of the slurry during coating is within the set pressure range, improving the coating effect, and the coating diaphragm valve 500 is common in the market and convenient to purchase. When assembling the coating diaphragm valve 500 to the coating discharge pipe 230, the assembly is convenient and simple, so that the overall structure of the coating valve mechanism is simple and the design is reasonable.

[0034] When the pole piece coating needs to perform a blanking operation, the coating driving unit 600 closes the coating discharge pipe 230 and the coating inner cavity 210. At the same time, the reflux driving unit 400 opens the reflux inner cavity 110 and the reflux pipe 140. The slurry enters the reflux inner cavity 110 from the feed pipe 120. The slurry in the reflux inner cavity 110 will flow into the reflux pipe 140 and then flow back to the feeding device along the reflux pipe 140. Since the coating discharge pipe 230 and the coating inner cavity 210 are closed, the slurry cannot flow from the coating discharge pipe 230 into the coating device, so as to realize the blanking operation during the pole piece coating. And a reflux diaphragm valve 300 is provided on the reflux pipe 140. The reflux diaphragm valve 300 is also an electric diaphragm valve. Since the electric diaphragm valve has precise control ability and fast response speed, therefore, the flow rate of the slurry during the blanking operation of the electrode coating can be controlled, so as to ensure that the pressure during the slurry blanking work is within the set pressure range. And the reflux diaphragm valve 300 is common in the market and convenient to purchase. When assembling the reflux diaphragm valve 300 to the reflux pipe 140, its assembly is convenient and simple, so that the overall structure of the coating valve mechanism is simple and the design is reasonable.

[0035] In addition, for the convenience of assembling the coating valve mechanism and for sealing the reflux inner cavity 110 of the reflux valve body 100 and the coating inner cavity 210 of the coating valve body 200, in this embodiment, the feed pipe 120 and the reflux valve body 100, the reflux pipe 140 and the reflux valve body 100, the reflux discharge port 130 and the coating feed port 220, and the coating discharge pipe 230 and the coating valve body 200 are all connected by a clamp 700, and a sealing ring 710 is provided at the connection. The clamp 700 can facilitate the assembly, and the sealing ring 710 can seal the reflux inner cavity 110 and the coating inner cavity 210 to realize the transportation of the slurry.

[0036] Please refer to Figures 1 to 4 , in order to realize the opening / closing between the reflux inner cavity 110 and the reflux pipe 140. Therefore, the reflux driving unit 400 in this embodiment includes a reflux fixing seat 410, a reflux motor 420, a reflux cam 430, a reflux slider 440 and a reflux valve rod 450. The reflux fixing seat 410 is located below the reflux valve body 100. The reflux motor 420 is installed on the reflux fixing seat 410 and its output end is connected to the reflux cam 430. The reflux slider 440 is movably arranged on the reflux fixing seat 410 and is connected to the reflux cam 430. The reflux motor 420 drives the reflux cam 430 to rotate. The reflux cam 430 thereby drives the reflux slider 440 to slide up and down along the reflux fixing seat 410. One end of the reflux valve rod 450 is connected to the reflux slider 440, and the other end extends from the bottom of the reflux valve body 100 into the reflux inner cavity 110, and a reflux valve core 460 is provided at the extending end.

[0037] When opening / closing between the reflux inner cavity 110 and the reflux pipeline 140, the reflux cam 430 is driven by the reflux motor 420 to rotate. When the reflux cam 430 rotates, it will drive the reflux slider 440 to slide up and down along the reflux fixed seat 410. When the reflux slider 440 slides up and down, it will drive the reflux valve rod 450 to move up and down. When the reflux valve rod 450 moves up and down, it will drive the reflux valve core 460 to move. By the movement of the reflux valve core 460, the opening / closing between the reflux inner cavity 110 and the reflux pipeline 140 is realized to ensure the intermittent coating operation of the electrode.

[0038] Similarly, the coating driving unit 600 in this embodiment includes a coating fixed seat 610, a coating motor 620, a coating cam 630, a coating slider 640 and a coating valve rod 650. The coating fixed seat 610 is located below the coating valve body 200. The coating motor 620 is installed on the coating fixed seat 610 and its output end is connected to the coating cam 630. The coating slider 640 is movably arranged on the coating fixed seat 610 and is connected to the coating cam 630. The coating motor 620 drives the coating cam 630 to rotate, and the coating cam 630 thereby drives the coating slider 640 to slide up and down along the coating fixed seat 610. One end of the coating valve rod 650 is connected to the coating slider 640, and the other end extends from the bottom of the coating valve body 200 into the coating inner cavity 210, and a coating valve core 660 is provided at the extending end. When opening / closing between the coating inner cavity 210 and the coating discharge pipeline 230, the coating motor 620 drives the coating cam 630 to rotate. When the coating cam 630 rotates, it will drive the coating slider 640 to slide up and down along the coating fixed seat 610. When the coating slider 640 slides up and down, it will drive the coating valve rod 650 to move up and down. When the coating valve rod 650 moves up and down, it will drive the coating valve core 660 to move. By the movement of the coating valve core 660, the opening / closing between the coating inner cavity 210 and the coating discharge pipeline 230 is realized to ensure the intermittent coating operation of the electrode.

[0039] The reflux motor 420 and the coating motor 620 in this embodiment both adopt servo motors, and the rotational speed of the servo motor can be as high as 6000 r / min to ensure the normal operation of the intermittent coating work and meet the intermittent coating requirements of 100 m / min and an interval of 8 mm.

[0040] Finally, please refer to Figures 2 to 5, in order to protect the reflux motor 420 and the coating motor 620 and ensure their service life, a protective cover 800 is provided outside the reflux motor 420 and the coating motor 620, and they can be effectively protected through the protective cover 800; when the reflux motor 420 and the coating motor 620 are working, they will generate a large amount of heat. In order to ensure their stable operation, therefore, in this embodiment, a cooling fan 810 is provided inside the protective cover 800, and the cooling fan 810 is used to blow away the heat generated when the reflux motor 420 and the coating motor 620 are working, so as to prevent the reflux motor 420 and the coating motor 620 from overheating and causing damage to the coating valve mechanism, thereby improving the performance stability of the coating valve mechanism.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry can smoothly implement the present invention according to what is shown in the accompanying drawings of the specification and what is described above; however, any equivalent changes made by those skilled in this professional field within the scope of the technical solution of the present invention by using the technical content disclosed above, such as minor modifications, decorations and evolutions, are equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. An intermittent coating valve mechanism, characterized in that: It includes a reflux valve body and a coating valve body arranged side by side. The interior of the reflux valve body has a reflux inner cavity. On one side of the reflux valve body, a feed pipe is connected, and on the other side, there is a reflux discharge port. The upper end of the reflux valve body is connected to a reflux pipe, and a reflux diaphragm valve is provided on the reflux pipe. The feed pipe, the reflux discharge port, and the reflux pipe are all communicated with the reflux inner cavity. At the bottom of the reflux valve body, a reflux driving unit is also connected. The interior of the coating valve body has a coating inner cavity. On one side of the coating valve body, there is a coating feed port connected to the reflux discharge port. The upper end of the coating valve body is connected to a coating discharge pipe, and a coating diaphragm valve is provided on the coating discharge pipe. The coating feed port and the coating discharge pipe are all communicated with the coating inner cavity. At the bottom of the coating valve body, a coating driving unit is also connected.

2. The gap coating valve mechanism according to claim 1, characterized in that: The reflux driving unit includes a reflux fixed seat, a reflux motor, a reflux cam, a reflux slider, and a reflux valve rod. The reflux fixed seat is located below the reflux valve body. The reflux motor is installed on the reflux fixed seat, and the output end is connected to the reflux cam. The reflux slider is movably arranged on the reflux fixed seat and is connected to the reflux cam. The reflux motor drives the reflux cam to rotate, and the reflux cam thereby drives the reflux slider to slide up and down along the reflux fixed seat. One end of the reflux valve rod is connected to the reflux slider, and the other end extends from the bottom of the reflux valve body into the reflux inner cavity, and a reflux valve core is provided at the extending end.

3. The gap coating valve mechanism according to claim 2, characterized in that: The coating driving unit includes a coating fixed seat, a coating motor, a coating cam, a coating slider, and a coating valve rod. The coating fixed seat is located below the coating valve body. The coating motor is installed on the coating fixed seat, and the output end is connected to the coating cam. The coating slider is movably arranged on the coating fixed seat and is connected to the coating cam. The coating motor drives the coating cam to rotate, and the coating cam thereby drives the coating slider to slide up and down along the coating fixed seat. One end of the coating valve rod is connected to the coating slider, and the other end extends from the bottom of the coating valve body into the coating inner cavity, and a coating valve core is provided at the extending end.

4. The gap coating valve mechanism according to claim 1, wherein: The connections between the feed pipe and the reflux valve body, between the reflux pipe and the reflux valve body, between the reflux discharge port and the coating feed port, and between the coating discharge pipe and the coating valve body are all made by using clamp connections, and sealing rings are provided at the connection points.

5. The gap coating valve mechanism according to claim 3, wherein: The outsides of the reflux motor and the coating motor are covered with protective covers.

6. The gap coating valve mechanism according to claim 5, wherein: A cooling fan is provided inside the protective cover.

7. The gap coating valve mechanism according to claim 3, wherein: Both the reflux motor and the coating motor are servo motors.

8. The gap coating valve mechanism according to claim 1, characterized in that: Both the reflux diaphragm valve and the coating diaphragm valve are electric diaphragm valves.

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