Coating feeding device and coating equipment

Abstract

The utility model relates to the technical field of fuel cells, and provides a coating feeding device and coating equipment. The utility model discloses a coating feeding device which comprises a slurry feeding mechanism, a feeding pipeline connected with the slurry feeding mechanism and a coating die head, and a slurry pushing part arranged on the feeding pipeline, a slurry pushing unit and a driving unit used for driving the slurry pushing unit to move are arranged in the slurry pushing part, and when bubbles exist in the slurry in the feeding pipeline, the driving unit can drive the slurry pushing unit to enter the feeding pipeline and push the slurry in the feeding pipeline to the coating die head. According to the coating feeding device, the residual quantity of slurry in the feeding pipeline can be reduced, the utilization rate of the slurry can be improved, meanwhile, bubbles can be intercepted at the upstream of the slurry pushing unit, the situation that the slurry doped with the bubbles is conveyed to a coating die head, and the coating quality is affected is avoided, and therefore the coating operation efficiency and quality are improved advantageously.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, and in particular to a coating feeding device. It also relates to a coating equipment having the coating feeding device. Background Technology

[0002] Proton exchange membrane fuel cells (PEMFCs) are highly suitable as a power source for new energy and environmentally friendly vehicles due to their advantages such as high efficiency, rapid low-temperature start-up, and zero pollution. In the manufacturing process of PEMFCs, the coating process has a significant impact on battery performance and is a crucial step in the entire production process.

[0003] Slit coating is a coating technology in which coating slurry is pressed out along the slit of a coating die under certain pressure and transferred to a moving substrate. It has advantages such as fast coating speed, good coating uniformity, and wide coating window. However, traditional slit coating devices have problems such as air bubbles mixed in the feed tube, which enter the coating die head and affect the coating quality. At the same time, there are also problems such as a lot of residual slurry in the feed tube and low slurry utilization rate, which is not conducive to cost reduction and efficiency improvement in coating operations. Utility Model Content

[0004] In view of this, the present invention aims to provide a coating feeding device that is beneficial to improving slurry utilization and coating quality.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A coating feeding device includes a slurry feeding mechanism, a feeding pipeline connecting the slurry feeding mechanism and a coating die head, and a slurry pushing part disposed on the feeding pipeline;

[0007] The slurry pushing section is provided with a slurry pushing unit and a driving unit for driving the slurry pushing unit to move. When there are air bubbles in the slurry in the supply pipeline, the driving unit can drive the slurry pushing unit into the supply pipeline and push the slurry in the supply pipeline to the coating die head.

[0008] Furthermore, the driving unit includes a connecting pipe with one end connected in parallel to the feeding pipeline, and the driving unit is connected to the other end of the connecting pipe; the slurry pushing unit is located in the connecting pipe, and the driving unit includes an air source capable of supplying gas into the connecting pipe to drive the slurry pushing unit to move.

[0009] Furthermore, the slurry pushing unit includes a pushing ball located in the connecting pipe.

[0010] Furthermore, the pusher ball is made of PTFE material.

[0011] Furthermore, a first control valve is provided on the connecting pipe, and the slurry pushing unit is located on the side of the first control valve closer to the feeding pipeline.

[0012] Furthermore, the feed pipeline is equipped with a second control valve and a third control valve; the connection point between the connecting pipe and the feed pipeline is located between the second control valve and the third control valve, and along the conveying direction of the slurry in the feed pipeline, the second control valve is located downstream of the third control valve.

[0013] Furthermore, the feed pipeline is provided with a bubble detection unit for detecting air bubbles in the slurry, and the bubble detection unit is located upstream of the third control valve along the conveying direction of the slurry in the feed pipeline.

[0014] Furthermore, the feed pipeline is provided with a pressure detection unit for detecting the pressure of the slurry, and the pressure detection unit is located upstream of the bubble detection unit along the conveying direction of the slurry in the feed pipeline.

[0015] Furthermore, it also includes a control unit; the bubble detection unit, the pressure detection unit, the gas source, as well as the first control valve, the second control valve and the third control valve are all connected to the control unit.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] The coating feeding device of this utility model, based on the setting of the slurry pushing part, can drive the slurry pushing unit into the feeding pipeline when there are air bubbles in the feeding pipeline, and push the slurry in the feeding pipeline to the coating die head. This not only reduces the amount of slurry residue in the feeding pipeline and improves the slurry utilization rate, but also traps air bubbles upstream of the slurry pushing unit, preventing slurry mixed with air bubbles from being transported to the coating die head and affecting the coating quality. This can improve the coating operation efficiency and the quality of the finished product.

[0018] Furthermore, the drive unit utilizes a gas source capable of delivering gas, resulting in a simple structure, easy layout, and cost reduction. The slurry pushing unit employs a pushing ball, which reduces friction with the connecting pipes and supply lines, facilitating the movement of the slurry pushing unit. The pushing ball is made of PTFE material, which offers higher chemical stability, a low coefficient of friction, and non-stick properties, not only facilitating its movement within the connecting pipes and supply lines but also preventing corrosion by the slurry.

[0019] Furthermore, by installing a first control valve on the connecting pipe, it is not only beneficial to control the timing of the air source driving the slurry pushing unit, but also to prevent slurry from flowing to the air source through the connecting pipe. The coordinated arrangement of the second and third control valves allows the air source to drive the slurry pushing unit to move towards the coating die head when the third control valve is closed and the first and second control valves are open. A bubble detection unit is installed upstream of the third control valve along the slurry conveying direction in the supply pipeline. When the bubble detection unit detects a bubble, the drive unit drives the slurry pushing unit into the supply pipeline, reducing the risk of bubbles affecting coating quality.

[0020] Furthermore, by incorporating a pressure detection unit, which can be used in conjunction with a bubble detection unit, the pressure detection unit can detect pressure loss, and the bubble detection unit can detect bubbles. Upon detection, the drive unit then activates the slurry pushing unit, further improving slurry utilization and coating quality. Connecting the bubble detection unit, pressure detection unit, air source, and the first, second, and third control valves to the control unit facilitates the overall automation and intelligent design of the device, thereby enhancing coating operation efficiency.

[0021] Another objective of this invention is to provide a coating device, wherein the coating device is provided with a coating feeding device as described above.

[0022] The coating equipment described in this utility model is equipped with the above-mentioned coating feeding device, which can not only reduce the risk of air bubbles affecting coating quality, but also improve the utilization rate of slurry, thus having greater practicality. Attached Figure Description

[0023] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of the coating feeding device described in an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the slurry pushing part according to an embodiment of the present invention;

[0026] Figure 3 This is a structural block diagram showing the connection between the control unit and other components according to an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Slurry feeding mechanism; 11. Mixing tank; 12. Drive pump;

[0029] 2. Coating die head; 3. Material supply pipeline; 31. Second control valve; 32. Third control valve;

[0030] 4. Slurry pushing section; 41. Pushing ball; 42. Connecting pipe; 421. First control valve; 43. Air source;

[0031] 5. Bubble detection department; 6. Pressure detection department; 7. Control department. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0033] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] This embodiment relates to a coating feeding device, which helps to solve the problems of low slurry utilization and air bubbles affecting coating quality in traditional coating processes, thereby improving coating efficiency and finished product quality.

[0039] In terms of overall structure, such as Figure 1 and Figure 2 As shown, the coating feeding device of this embodiment includes a slurry feeding mechanism 1, a feeding pipeline 3 connecting the slurry feeding mechanism 1 and the coating die 2, and a slurry pushing part 4 provided on the feeding pipeline 3. Furthermore, the slurry pushing part 4 is provided with a slurry pushing unit and a driving unit for driving the slurry pushing unit to move. When air bubbles are present in the slurry in the feeding pipeline 3, the driving unit can drive the slurry pushing unit into the feeding pipeline 3 and push the slurry in the feeding pipeline 3 to the coating die 2.

[0040] At this time, based on the above settings, when there are air bubbles in the feed pipe 3, the drive unit can drive the slurry pushing unit into the feed pipe 3 and push the slurry in the feed pipe 3 to the coating die head 2. This not only reduces the amount of slurry residue in the feed pipe 3 and improves the slurry utilization rate, but also traps air bubbles upstream of the slurry pushing unit, preventing slurry mixed with air bubbles from being transported to the coating die head 2 and affecting the coating quality.

[0041] Based on the above overall introduction, in detail, in this embodiment, the feeding pipeline 3 can be made of transparent material. In particular, the part of the feeding pipeline 3 located upstream of the slurry pusher 4 along the conveying direction of the slurry in the feeding pipeline 3 can be made of transparent material. In this way, it is convenient to observe whether there are air bubbles in the slurry, and when air bubbles are found, the driving unit can drive the slurry pusher unit to enter the feeding pipeline 3 in time to trap the air bubbles on the side of the slurry pusher unit away from the coating die head 2, thereby preventing air bubbles from entering the coating die head 2 with the slurry.

[0042] Furthermore, the aforementioned transparent material can be, for example, polycarbonate, polyethylene, polyurethane, polyvinylidene fluoride, or polyvinyl chloride. Meanwhile, the slurry feeding mechanism 1 in this embodiment preferably includes a mixing tank 11 for stirring and storing the slurry. The mixing tank 11 is connected to the coating die head 2 via the aforementioned feeding pipeline 3, and a drive pump 12 is provided on the feeding pipeline 3 near the output end of the mixing tank 11. The drive pump 12 is used to pressurize and drive the slurry to flow in the feeding pipeline 3. Of course, any structural parts not mentioned in the coating feeding device of this embodiment can be referred to from the various structures in coating equipment well known to those skilled in the art, and will not be described in detail here.

[0043] In this embodiment, as a preferred implementation, please refer to... Figure 2As shown, the drive unit includes a connecting pipe 42 with one end connected in parallel to the feed pipe 3, and the drive unit is connected to the other end of the connecting pipe 42. In the specific structure, the slurry pushing unit is located in the connecting pipe 42, and the drive unit includes an air source 43 that can deliver gas into the connecting pipe 42 to drive the slurry pushing unit to move.

[0044] Understandably, using a gas source 43 to drive the slurry pushing unit is simpler in structure and easier to arrange the slurry pushing part 4 in the device compared to using other mechanical mechanisms to drive the slurry pushing unit, thus achieving cost reduction. In specific implementations, the gas source 43 can be a gas storage tank that stores pressurized gas, or an air compressor or other equipment capable of outputting enough gas to drive the slurry pushing unit.

[0045] Furthermore, in this embodiment, if necessary, the connecting pipe 42 can be inclined relative to the feeding pipe 3, especially in the opposite direction to the conveying direction of the slurry in the feeding pipe 3, which is more conducive to driving the slurry pushing unit into the feeding pipe 3.

[0046] In this embodiment, as a preferred implementation, the slurry pushing unit includes a pushing ball 41 located in the connecting pipe 42. This arrangement reduces friction between the slurry pushing unit and the connecting pipe 42 and the supply pipe 3, facilitating the movement of the slurry pushing unit.

[0047] In this specific implementation, as a preferred embodiment, the pusher ball 41 is made of PTFE (Polytetrafluoroethylene) material. This allows the pusher ball 41 to have higher chemical stability, lower coefficient of friction and non-stickiness, which not only facilitates its movement in the connecting pipe 42 and the feeding pipe 3, but also prevents it from being corroded by the slurry.

[0048] Furthermore, as a preferred implementation, see [link to previous document]. Figure 1 and Figure 2 As shown, in this embodiment, a first control valve 421 is provided on the connecting pipe 42, and the slurry pushing unit is located on the side of the first control valve 421 near the supply pipe 3. By providing the first control valve 421 on the connecting pipe 42, it is not only convenient to control the timing of the air source 43 driving the slurry pushing unit, but also to prevent the slurry from flowing to the air source 43 through the connecting pipe 42.

[0049] Furthermore, in this embodiment, as a preferred implementation, the feed pipeline 3 is equipped with a second control valve 31 and a third control valve 32. The connection point between the connecting pipe 42 and the feed pipeline 3 is located between the second control valve 31 and the third control valve 32, and along the conveying direction of the slurry in the feed pipeline 3, the second control valve 31 is located downstream of the third control valve 32.

[0050] At this time, based on the coordinated setting of the second control valve 31 and the third control valve 32, when the third control valve 32 is closed and the first control valve 421 and the second control valve 31 are open, it is beneficial to drive the slurry pushing unit to move to the coating die head 2 through the air source 43.

[0051] In addition, in this embodiment, as a preferred implementation, the feed pipeline 3 is provided with a bubble detection unit 5 for detecting bubbles in the slurry. Along the conveying direction of the slurry in the feed pipeline 3, the bubble detection unit 5 is located upstream of the third control valve 32.

[0052] With this configuration, when the bubble detection unit 5 detects a bubble, the drive unit will drive the slurry pushing unit into the feeding pipeline 3, trapping the bubble on the side of the slurry pushing unit away from the coating die head 2, thereby reducing the risk of bubbles affecting the coating quality.

[0053] Meanwhile, in this embodiment, as a preferred implementation, the feed pipeline 3 is provided with a pressure detection unit 6 for detecting the pressure of the slurry. Along the conveying direction of the slurry in the feed pipeline 3, the pressure detection unit 6 is located upstream of the bubble detection unit 5.

[0054] Here, by setting up a pressure detection unit 6, it can be used in conjunction with a bubble detection unit 5. When the pressure detection unit 6 detects a loss of pressure and the bubble detection unit 5 detects a bubble, the drive unit then drives the slurry pushing unit to operate, which helps to further improve the slurry utilization rate and coating quality.

[0055] Considering the need for overall coating efficiency, in this embodiment, as a preferred implementation, see [reference needed]. Figure 3 As shown, the coating feeding device in this embodiment also includes a control unit 7. The bubble detection unit 5, pressure detection unit 6, air source 43, and the first control valve 421, second control valve 31, and third control valve 32 are all connected to the control unit 7. The advantage of this arrangement is that the control unit 7 can control the other components, facilitating the overall automation and intelligent design of the device, thereby improving coating efficiency.

[0056] In specific implementation, the pressure detection unit 6 is preferably located between the drive pump 12 and the mixing tank 11, and the bubble detection unit 5 is preferably located between the drive pump 12 and the third control valve 32. Furthermore, in this embodiment, the bubble detection unit 5 can be a bubble sensor, the pressure detection unit 6 can be a pressure sensor, and the control unit 7 can be a controller, specifically a PLC controller. If necessary, both the mixing tank 11 and the drive pump 12 can be connected to the control unit 7 to enhance the overall automation and intelligence of the device.

[0057] The usage process of this embodiment is as follows: When the coating operation is about to end, the slurry in the mixing tank 11 is depleted, and the pressure detection unit 6 loses pressure and detects that there is no slurry to re-enter the drive pump 12, and when the bubble detector detects bubbles, the control unit 7 can control the air source 43 and the first control valve 421 to open, pushing the pusher ball 41 from the connecting pipe 42 into the supply pipe 3. Subsequently, the control unit 7 controls the air source 43 and the first control valve 421 to close, and opens the second control valve 31, the third control valve 32 and the drive pump 12, so that the drive pump 12 drives the slurry to drive the pusher ball 41 into the part of the supply pipe 3 located downstream of the connecting pipe 42. At this time, the control unit 7 controls the third control valve 32 and the drive pump 12 to close, and opens the air source 43 and the first control valve 421 to push the pusher ball 41 to the end of the supply pipe 3, that is, to the coating die head 2. After coating is completed, disconnect the feed line 3 and put the pusher ball 41 back into the connecting pipe 42 for use in the next operation.

[0058] The coating feeding device of this embodiment can not only reduce the amount of slurry residue in the feeding pipeline 3 and improve the slurry utilization rate, but also trap air bubbles upstream of the slurry pushing unit to prevent slurry mixed with air bubbles from being transported to the coating die head 2, thereby improving the coating quality. At the same time, based on the coordinated arrangement of the bubble detection unit 5, pressure detection unit 6, first control valve 421, second control valve 31, third control valve 32 and control unit 7, it is conducive to realizing the overall automation and intelligence of the device, thereby improving the coating operation efficiency.

[0059] Example 2

[0060] This embodiment relates to a coating device, which includes the coating feeding device described in Embodiment 1.

[0061] The coating equipment of this embodiment, by setting the coating feeding device in Embodiment 1, can prevent air bubbles from being transported to the coating die head 2 and reduce the residue of slurry in the feeding pipeline 3, thereby improving the slurry utilization rate and coating quality, and thus improving the product strength of the coating equipment.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coating feeding device, characterized in that: It includes a slurry feeding mechanism (1), a feeding pipeline (3) connecting the slurry feeding mechanism (1) and the coating die (2), and a slurry pushing part (4) provided on the feeding pipeline (3); The slurry pushing section (4) is provided with a slurry pushing unit and a driving unit for driving the slurry pushing unit to move. When there are air bubbles in the slurry in the supply pipe (3), the driving unit can drive the slurry pushing unit into the supply pipe (3) and push the slurry in the supply pipe (3) to the coating die head (2).

2. The coating feeding device according to claim 1, characterized in that: The drive unit includes a connecting pipe (42) with one end connected in parallel to the feeding pipeline (3), and the drive unit is connected to the other end of the connecting pipe (42); The slurry pushing unit is located in the connecting pipe (42), and the driving unit includes an air source (43) capable of supplying gas into the connecting pipe (42) to drive the slurry pushing unit to move.

3. The coating feeding device according to claim 2, characterized in that: The slurry pushing unit includes a pushing ball (41) located in the connecting pipe (42).

4. The coating feeding device according to claim 3, characterized in that: The pusher ball (41) is made of PTFE material.

5. The coating feeding device according to any one of claims 2 to 4, characterized in that: The connecting pipe (42) is provided with a first control valve (421), and the slurry pushing unit is located on the side of the first control valve (421) near the feeding pipe (3).

6. The coating feeding device according to claim 5, characterized in that: The feed pipeline (3) is equipped with a second control valve (31) and a third control valve (32); The connection point between the connecting pipe (42) and the feeding pipeline (3) is located between the second control valve (31) and the third control valve (32), and along the conveying direction of the slurry in the feeding pipeline (3), the second control valve (31) is located downstream of the third control valve (32).

7. The coating feeding device according to claim 6, characterized in that: The feed pipeline (3) is provided with a bubble detection unit (5) for detecting bubbles in the slurry. Along the conveying direction of the slurry in the feed pipeline (3), the bubble detection unit (5) is located upstream of the third control valve (32).

8. The coating feeding device according to claim 7, characterized in that: The feed pipeline (3) is provided with a pressure detection unit (6) for detecting the pressure of the slurry. Along the conveying direction of the slurry in the feed pipeline (3), the pressure detection unit (6) is located upstream of the bubble detection unit (5).

9. The coating feeding device according to claim 8, characterized in that: It also includes a control unit (7); The bubble detection unit (5), the pressure detection unit (6), the air source (43), the first control valve (421), the second control valve (31) and the third control valve (32) are all connected to the control unit (7).

10. A coating apparatus, characterized in that: The coating equipment is provided with a coating feeding device as described in any one of claims 1 to 9.

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