Coating device

Abstract

The utility model relates to a coating device. The coating device comprises a fixed passing roller; the coating mechanism is located below the fixed passing roller and comprises two coating units, each coating unit comprises a coating roller, and a coating channel is formed between the two coating rollers; the blade coating mechanism comprises two blade coating units, each blade coating unit comprises a blade coating roller, the two blade coating rollers and the two coating rollers are arranged in a one-to-one correspondence mode, and a blade coating gap is formed between each blade coating roller and the corresponding coating roller. Compared with the prior art that the coatings on the surfaces of the two sides of the base material belt are formed through coating in two successive coating procedures, the coating device can form the coatings on the two sides of the base material belt through coating in the same coating procedure, and therefore it is guaranteed that coating, curing and the like of the coatings on the two sides of the base material belt are carried out synchronously; the difference of the coatings on the two sides of the base material belt is reduced as much as possible, so that the interface resistance of the composite diaphragm is reduced, and the performance of the composite diaphragm is improved.

Description

Technical Field

[0001] This application relates to the field of alkaline water electrolysis technology, specifically a coating device. Background Technology

[0002] Currently, hydrogen energy is considered a major strategic direction for global energy and power transformation, attracting widespread attention from countries worldwide. At present, the main sources of hydrogen are fossil fuels such as natural gas and coal, and the production process still emits large amounts of carbon dioxide. Hydrogen produced by water electrolysis is considered "green hydrogen" and is seen as the ultimate direction for hydrogen production. Among water electrolysis hydrogen production technologies, alkaline water electrolysis technology is currently the most mature. Generally, a diaphragm is installed in the alkaline water electrolyzer to prevent the interdiffusion of hydrogen and oxygen, while allowing the permeation of hydroxide ions and water.

[0003] The quality of the membrane directly affects the hydrogen production performance of the electrolyzer. After multiple technological iterations, composite membranes are widely recognized as the future direction for upgrading membrane materials in alkaline electrolyzers. The manufacturing process of composite membranes involves coating both sides of the substrate sequentially. This results in the coating and curing processes on both sides of the substrate being completed in different steps, leading to significant differences in the coatings on both sides. This, in turn, increases the interfacial resistance of the membrane material and severely affects the performance of the composite membrane. Utility Model Content

[0004] Therefore, it is necessary to provide a coating device that can avoid increasing the interfacial resistance of the membrane material and improve the performance of the composite membrane in order to address the above problems.

[0005] A coating apparatus, comprising:

[0006] Fixed roller;

[0007] A coating mechanism, located below the fixed roller, includes two coating units, each including a coating roller, with a coating channel formed between the two coating rollers; and

[0008] The coating mechanism includes two coating units, each of which includes a coating roller. The two coating rollers are arranged in a one-to-one correspondence with the two coating rollers, and there is a coating gap between each coating roller and the corresponding coating roller.

[0009] In some embodiments, each of the coating units further includes a slurry bin, and a portion of the roller surface of the coating roller is located within the slurry bin.

[0010] In some embodiments, each of the coating units further includes a first position adjustment assembly, on which the coating roller is mounted.

[0011] In some embodiments, the two coating rollers are spaced apart along a preset horizontal direction, and the first position adjustment component is used to drive the coating rollers to adjust their position along the preset horizontal direction.

[0012] In some embodiments, each of the first position adjustment components includes a first drive member and a first adjustment seat, the first adjustment seat being mounted on the drive end of the first drive member, and the coating roller being disposed on the first adjustment seat.

[0013] In some embodiments, each of the coating units further includes a second position adjustment assembly, on which the coating roller is mounted.

[0014] In some embodiments, each of the second position adjustment components includes a second drive member and a second adjustment seat, the second adjustment seat being mounted on the drive end of the second drive member, and the coating roller being disposed on the second adjustment seat.

[0015] In some embodiments, the coating apparatus further includes a position adjustment mechanism, on which both coating units and both scraping units are disposed.

[0016] In some embodiments, the coating apparatus further includes a roller mechanism located below the coating mechanism, the roller mechanism comprising two opposing rollers that abut against each other.

[0017] In some embodiments, the roller mechanism is configured as a plurality of roller mechanisms, which are spaced apart in a vertical direction.

[0018] In actual use, the aforementioned coating apparatus involves the base material strip being conveyed downwards after passing over a fixed roller, and then passing through the coating channel between two coating rollers. Simultaneously, the two coating rollers rotate in opposite directions, and two scraper rollers remove excess slurry from the two coating rollers respectively. The two coating rollers then apply the slurry to both sides of the base material strip, thereby ensuring that the coating thickness on both sides of the base material strip is the set value.

[0019] Compared with the prior art where the coatings on both sides of the base material strip are formed in two consecutive coating processes, the coating apparatus in this application can form coatings on both sides of the base material strip in the same coating process, thereby ensuring that the coating and curing of the coatings on both sides of the base material strip are carried out simultaneously, minimizing the difference between the coatings on both sides of the base material strip, thereby reducing the interfacial resistance of the composite diaphragm and improving the performance of the composite diaphragm. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the coating apparatus in one embodiment of this application;

[0021] Figure 2 for Figure 1 The diagram shows the structural schematics of the coating mechanism and the scraping mechanism of the coating apparatus. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0023] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening 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 an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0028] Please see Figure 1 and Figure 2 This application provides a coating apparatus for coating slurry D onto both sides of a base material belt A, forming a composite membrane composed of the base material belt A and coatings on both sides of the base material belt A. The coating apparatus includes a fixed roller 30, a coating mechanism (not shown), and a scraping mechanism (not shown). The fixed roller 30 is used for the base material belt A to pass through. The coating mechanism is located below the fixed roller 30 and includes two coating units 41. Each coating unit 41 includes a coating roller 411, and a coating channel B is formed between the two coating rollers 411 for the base material belt A to pass through from top to bottom. The two sides of the base material belt A passing through the coating channel B contact the two coating rollers 411 respectively, thereby transferring the slurry D onto both sides of the base material belt A, thus achieving coating on both sides of the base material belt A. The scraping mechanism includes two scraping units 51, each scraping unit 51 including a scraping roller 511. Two scraper rollers 511 are arranged in a one-to-one correspondence with two coating rollers 411. Each scraper roller 511 has a scraping gap C with the corresponding coating roller 411 so that each scraper roller 511 scrapes off the excess slurry D on the corresponding coating roller 411.

[0029] It should be noted that the two coating rollers 411 can rotate in opposite directions under the drive of a motor or other rotary drive, thereby allowing the base material belt A passing between the two coating rollers 411 to be smoothly conveyed downwards. The two doctor rollers 511 can also rotate under the drive of a motor or other rotary drive, and each doctor roller 511 rotates in the opposite direction to the corresponding coating roller 411, thereby allowing the doctor roller 511 to scrape off excess slurry D from the corresponding coating roller 411.

[0030] In actual use, the coating apparatus described above involves the base material belt A being conveyed downwards after passing over the fixed roller 30, and then passing through the coating channel B between the two coating rollers 411. Simultaneously, the two coating rollers 411 rotate in opposite directions, and the two scraper rollers 511 scrape off excess slurry D from the two coating rollers 411. The two coating rollers 411 then apply the slurry D to both sides of the base material belt A, thereby ensuring that the coating thickness on both sides of the base material belt A is the set value.

[0031] Compared with the prior art where the coatings on both sides of the base material strip A are formed in two consecutive coating processes, the coating apparatus in this application can form coatings on both sides of the base material strip A in the same coating process. This ensures that the coating and curing of the coatings on both sides of the base material strip A are carried out simultaneously, minimizing the difference between the coatings on both sides of the base material strip A, thereby reducing the interfacial resistance of the composite membrane and improving the performance of the composite membrane.

[0032] Specifically, two coating rollers 411 are spaced apart along a predetermined horizontal direction, forming a coating channel B between them for the vertical base material strip A to pass through from top to bottom. Figure 1 In the embodiment shown, the preset horizontal direction is the left-right direction.

[0033] In a specific embodiment, the coating apparatus further includes a main drive mechanism 10 and a tension roller 20. The main drive mechanism 10 is used to pull the base material belt A toward the tension roller 20. The tension roller 20 is located above the fixed roller 30 and is used for the base material belt A to pass through, so that the base material belt A is turned and conveyed to the fixed roller 30 after passing through the tension roller 20. In this way, the speed at which the base material belt A is pulled toward the tension roller 20 can be adjusted by the main drive mechanism 10, thereby adjusting the tension of the base material belt A passing through the coating mechanism.

[0034] Understandably, the tension roller 20 can rotate around its own axis, allowing the base material belt A passing through it to be conveyed downstream, preventing friction and damage between the base material belt A and the tension roller 20. The tension roller 20 can also move within a certain range under the drive of a driving component, thereby adjusting the tension of the base material belt A by adjusting its position. For example, in... Figure 1 In the embodiment shown, when the tension roller 20 is driven to move to the left by the driving member, the tension of the base material belt A passing through the coating mechanism increases; when the tension roller 20 is driven to move to the right by the driving member, the tension of the base material belt A passing through the coating mechanism decreases.

[0035] Specifically, the main drive mechanism 10 includes two drive rollers 11, which are arranged opposite to each other and together clamp the base material belt A passing between them. Both drive rollers 11 can rotate around their own axes, with one being the driving roller and the other the driven roller. Thus, in actual use, controlling the rotation of the driving roller causes the driven roller to rotate in the opposite direction, while simultaneously, friction drives the base material belt A between the two drive rollers 11 to be conveyed to the tension roller 20. Of course, in other embodiments, both drive rollers 11 can be driving rollers, as long as they can convey the base material belt A between them to the tension roller 20; this is not limited here. It is understood that a motor or other rotary drive component can be used to drive the driving roller to rotate, as long as it can achieve the goal of driving the driving roller to rotate; this is not limited here.

[0036] It should be noted that the tension of the base material belt A passing through the coating mechanism can be adjusted by controlling the rotation speed of the drive roller 11 and the position of the tension roller 20, so as to ensure that the tension of the base material belt A passing through the coating mechanism remains at a preset value or fluctuates within a sufficiently small range.

[0037] In the embodiments of this application, each coating unit 41 further includes a slurry bin 413 for storing slurry D. A portion of the coating roller 411's roller surface is located within the slurry bin 413, so that during the rotation of the coating roller 411, the slurry D in the slurry bin 413 adheres to the roller surface of the coating roller 411. Then, when passing the doctor roller 511, excess slurry D on the coating roller 411 is scraped off by the doctor roller 511, and at the point where the coating roller 411 contacts the base material belt A, the adhered slurry D is transferred to the base material belt A, i.e., coating is performed on the base material belt A. It should be noted that a rotating drive component such as a motor can be used to drive the coating roller 411 to rotate.

[0038] Furthermore, during the rotation of the coating roller 411, any position on the roller surface of the coating roller 411 sequentially passes through the slurry bin 413, the doctor roller 511, and the coating channel B, so that any position on the roller surface of the coating roller 411 picks up the slurry D in the slurry bin 413 at the slurry bin 413, and the excess slurry D picked up at the doctor roller 511 is scraped off by the doctor roller 511, and the picked-up slurry D is transferred to the base material belt A through the coating channel B, thereby ensuring that the coating thickness on both sides of the base material belt A is the set value.

[0039] In a specific embodiment, each coating unit 41 further includes a first position adjustment component 415, on which the coating roller 411 is mounted. Thus, the position of the coating roller 411 is adjusted using the first position adjustment component 415, thereby adjusting the gap between the two coating rollers 411 to ensure a better coating effect. Specifically, the two coating rollers 411 are spaced apart along a preset horizontal direction, and the first position adjustment component 415 is used to drive the coating rollers 411 to adjust their position along this preset horizontal direction. Figure 1 In the embodiment shown, the preset horizontal direction is the left-right direction as illustrated.

[0040] Furthermore, each first position adjustment assembly 415 includes a first driving member (not shown) and a first adjustment seat (not shown). The first adjustment seat is mounted on the driving end of the first driving member, and the coating roller 411 is disposed on the first adjustment seat. The first driving member is used to drive the first adjustment seat to move, thereby the first adjustment seat drives the coating roller 411 thereon to move, that is, to adjust the position of the coating roller 411.

[0041] Optionally, the first driving component includes a first motor, a first lead screw, and a first lead screw nut. The output shaft of the first motor is fixedly connected to the first lead screw, enabling the first motor to drive the first lead screw to rotate around its own axis. The first lead screw nut is threaded onto the first lead screw, allowing the first lead screw nut to move axially along the first lead screw when the first lead screw rotates. The first lead screw nut is fixedly connected to a first adjusting seat, allowing the first adjusting seat to move together with the first lead screw nut, thereby driving the coating roller 411 on it to move together, thus achieving position adjustment of the coating roller 411. It should be noted that the first driving component is not limited to this. In other embodiments, the first driving component can also adopt other linear drive modules, as long as they can drive the coating roller 411 to perform position adjustment through the first adjusting seat, which is not limited here.

[0042] In the embodiments of this application, each coating unit 51 further includes a second position adjustment component 513. The coating roller 511 is mounted on the second position adjustment component 513, so that the second position adjustment component 513 can drive the coating roller 511 to adjust its position in the direction of approaching or moving away from the corresponding coating roller 411, thereby achieving the purpose of adjusting the size of the coating gap between the coating roller 511 and the corresponding coating roller 411, so as to ensure that the amount of slurry on the coating roller 411 after being scraped by the coating roller 511 meets the process requirements, and thus makes the coating thickness on both sides of the base material belt A after passing through the coating channel B the set value.

[0043] Furthermore, each second position adjustment assembly 513 includes a second drive member and a second adjustment seat. The second adjustment seat is mounted on the drive end of the second drive member, and the coating roller 511 is disposed on the second adjustment seat. The second drive member is used to drive the second adjustment seat to move, thereby driving the coating roller 511 on the second adjustment seat to move, that is, to adjust the position of the coating roller 511 relative to the corresponding coating roller 411.

[0044] Optionally, the second driving component includes a second motor, a second lead screw, and a second lead screw nut. The output shaft of the second motor is fixedly connected to the second lead screw, enabling the second motor to drive the second lead screw to rotate around its own axis. The second lead screw nut is threaded onto the second lead screw, allowing the second lead screw nut to move circumferentially along the second lead screw when the second lead screw rotates. The second lead screw nut is fixedly connected to a second adjusting seat, allowing the second adjusting seat to move together with the second lead screw nut, thereby driving the coating roller 511 on it to move together, thus achieving position adjustment of the coating roller 511. It should be noted that the second driving component is not limited to this. In other embodiments, the second driving component can also adopt other linear drive modules, as long as they can drive the coating roller 511 to perform position adjustment through the second adjusting seat. This is not limited here.

[0045] In the embodiments of this application, the coating apparatus further includes a position adjustment mechanism 60. Two coating units 41 and two scraper units 51 are all mounted on the position adjustment mechanism 60, enabling the position adjustment mechanism 60 to drive the coating rollers 411, slurry tanks 413, and first position adjustment component 415 of the two coating units 41, as well as the scraper rollers 511 and second position adjustment component 513 of the two scraper units 51, to adjust their positions as a whole. This ensures that the base material strip A passes vertically between the two coating rollers 411, further improving the symmetry of the coatings on both sides of the base material strip A, i.e., improving the centering of the base material strip A between the coatings on both sides.

[0046] Preferably, the position adjustment mechanism 60 can drive the two coating units 41 and the two scraping units 51 to adjust their positions along the preset horizontal direction, thereby ensuring that the base material strip A passes through the two coating rollers 411 in a vertical state.

[0047] Furthermore, the position adjustment mechanism 60 includes a third driving member and a third adjusting seat. The third adjusting seat is mounted on the driving end of the third driving member, and both coating units 41 and two scraping units 51 are mounted on the third adjusting seat. The third driving member is used to drive the third adjusting seat to move, thereby causing the two coating units 41 and two scraping units 51 mounted on it to move as a whole, thus realizing the adjustment of the positions of the two coating units 41 and two scraping units 51.

[0048] Optionally, the third driving component includes a third motor, a third lead screw, and a third lead screw nut. The output shaft of the third motor is fixedly connected to the third lead screw, enabling the third motor to drive the third lead screw to rotate around its own axis. The third lead screw nut is threaded onto the third lead screw, allowing the third lead screw nut to move circumferentially along the third lead screw when the third lead screw rotates. The third lead screw nut is fixedly connected to a third adjusting seat, allowing the third adjusting seat to move together with the third lead screw nut. This, in turn, causes the two coating units 41 and two scraping units 51 on the third adjusting seat to move together, thereby achieving overall position adjustment of the two coating units 41 and two scraping units 51. It should be noted that the third driving component is not limited to this. In other embodiments, the third driving component can also adopt other linear drive modules, as long as they can drive the two coating units 41 and two scraping units 51 to perform position adjustment through the third adjusting seat. This is not limited here.

[0049] In embodiments of this application, the coating apparatus further includes a roller mechanism 70 located below the coating mechanism. The roller mechanism 70 includes two opposing rollers 71 that abut against each other, thereby clamping the uncoated area of ​​the substrate material belt A. This serves two purposes: firstly, it fixes the substrate material belt A, preventing it from shaking and negatively impacting the coating quality; secondly, it prevents the rollers 71 from contacting the coating layer of the substrate material belt A, thus avoiding damage to the coating.

[0050] It should be noted that the base material belt A includes the coating area to be coated and the uncoated area. When the base material belt A passes through the two coating rollers 411, the two coating rollers 411 contact the two side surfaces of the coating area of ​​the base material belt A respectively, thereby coating the two side surfaces of the coating area of ​​the base material belt A respectively. When the base material belt A passes between the two rollers 71, the two rollers 71 contact the two side surfaces of the uncoated area of ​​the base material belt A respectively, and clamp the base material belt A together to avoid vibration of the base material belt A between the fixed roller 30 and the roller mechanism 70, which is beneficial to improving the coating quality.

[0051] Understandably, both rollers 71 of the roller mechanism 70 can rotate around their own axes, so that the base material belt A can pass smoothly between the two rollers 71 of the roller mechanism 70 and continue to be conveyed downstream.

[0052] Furthermore, the roller mechanism 70 can be adjusted in position along the aforementioned preset horizontal direction to ensure that the base material strip A located between the fixed guide roller 30 and the roller mechanism 70 is in a vertical state. It should be noted that the position adjustment of the roller mechanism 70 can be achieved by a manual adjustment mechanism or by an automatic adjustment mechanism, and no special limitation is made here.

[0053] Furthermore, multiple roller mechanisms 70 are configured, which are arranged at intervals along the vertical direction. Each roller mechanism 70 uses its own rollers 71 to simultaneously clamp the uncoated area of ​​the base material belt A, making the base material belt A more stable and preventing vibration of the base material belt A between the fixed roller 30 and the roller mechanism 70, thereby further improving the coating quality. Specifically... Figure 1 In the illustrated embodiment, the number of roller mechanisms 70 is three. Of course, in other embodiments, the number of roller mechanisms 70 may also be two, four, or five, etc., and no special limitation is made here.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A coating apparatus, characterized in that, include: Fixed roller (30); The coating mechanism is located below the fixed roller (30) and includes two coating units (41), each of the coating units (41) including a coating roller (411), and a coating channel (B) is formed between the two coating rollers (411); and The coating mechanism includes two coating units (51), each of which includes a coating roller (511). The two coating rollers (511) are arranged in a one-to-one correspondence with the two coating rollers (411). Each coating roller (511) has a coating gap (C) between it and the corresponding coating roller (411).

2. The coating apparatus according to claim 1, characterized in that, Each of the coating units (41) further includes a slurry bin (413), and a portion of the roller surface of the coating roller (411) is located within the slurry bin (413).

3. The coating apparatus according to claim 1, characterized in that, Each of the coating units (41) further includes a first position adjustment assembly (415), on which the coating roller (411) is mounted.

4. The coating apparatus according to claim 3, characterized in that, The two coating rollers (411) are arranged at intervals along a preset horizontal direction, and the first position adjustment component (415) is used to drive the coating rollers (411) to adjust their positions along the preset horizontal direction.

5. The coating apparatus according to claim 3, characterized in that, Each of the first position adjustment components (415) includes a first drive member and a first adjustment seat, the first adjustment seat being mounted on the drive end of the first drive member, and the coating roller (411) being disposed on the first adjustment seat.

6. The coating apparatus according to claim 1, characterized in that, Each of the coating units (51) further includes a second position adjustment assembly (513), on which the coating roller (511) is mounted.

7. The coating apparatus according to claim 6, characterized in that, Each of the second position adjustment components (513) includes a second drive member and a second adjustment seat, the second adjustment seat being mounted on the drive end of the second drive member, and the coating roller (511) being disposed on the second adjustment seat.

8. The coating apparatus according to claim 1, characterized in that, The coating apparatus further includes a position adjustment mechanism (60), on which the two coating units (41) and the two scraping units (51) are all mounted.

9. The coating apparatus according to claim 1, characterized in that, The coating apparatus further includes a roller mechanism (70) located below the coating mechanism, the roller mechanism (70) including two rollers (71) arranged opposite to each other, the two rollers (71) abutting each other.

10. The coating apparatus according to claim 9, characterized in that, The roller mechanism (70) is configured as a plurality of roller mechanisms (70), which are arranged at intervals along the vertical direction.

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