Gas diffusion layer manufacturing apparatus

Abstract

The utility model belongs to fuel cell gas diffusion layer manufacturing technical field especially relates to a kind of gas diffusion layer manufacturing equipment, including base and conveying belt, the base upper portion is provided with manufacturing structure, the manufacturing structure includes manufacturing mechanism and auxiliary mechanism, the manufacturing mechanism includes manufacturing box, drying cabinet, dust screen, heating equipment, extraction pump, the manufacturing box top portion is interconnected with drying cabinet bottom portion.This gas diffusion layer manufacturing equipment realizes the air temperature in box that can be quickly promoted, can guide the base material on the surface of conveying belt with hot air accurately, ensure that base material surface is heated evenly, can drive calender roll and wind collection hood synchronous lifting, calender roll can be closely attached to base material surface, coating compaction uniform, avoid the problem that coating is not pressed or base material is damaged due to base material thickness change in traditional fixed calender structure, significantly improve gas diffusion layer thickness consistency, meet the requirement of mass transfer efficiency to fuel cell.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell gas diffusion layer manufacturing technology, specifically to a gas diffusion layer manufacturing device. Background Technology

[0002] The gas diffusion layer plays a crucial role in fuel cells, supporting the catalyst layer, collecting current, conducting gas, and removing reaction product water. Commonly used materials for the gas diffusion layer in proton exchange membrane fuel cell electrodes include carbon fiber paper, carbon fiber woven fabric, nonwoven fabric, and carbon black paper, thus requiring manufacturing equipment.

[0003] In the use of existing manufacturing equipment, raw materials are usually placed into the equipment for processing. However, in actual use, it is not possible to dry the raw materials quickly and easily, nor is it possible to compact the coating quickly and easily, thus reducing the working efficiency of the manufacturing equipment.

[0004] Therefore, we urgently need to provide a gas diffusion layer manufacturing equipment. Utility Model Content

[0005] The purpose of this invention is to provide a gas diffusion layer manufacturing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a gas diffusion layer manufacturing equipment, comprising a base and a conveyor belt, wherein a manufacturing structure is provided above the base;

[0007] The manufacturing structure includes manufacturing mechanisms and auxiliary mechanisms;

[0008] The manufacturing mechanism includes a manufacturing box, a drying box, a dustproof net, a heating device, and an extraction pump. The top of the manufacturing box is connected to the bottom of the drying box. The inner wall of the drying box is connected to the top of the dustproof net. The inner wall of the drying box is connected to one side of the heating device. The inner wall of the drying box is connected to the bottom of the extraction pump. A duct is connected to the bottom of the extraction pump. A wind collector is connected to the bottom of the duct. A connecting rod is fixedly installed on the top of the wind collector. An mounting plate is fixedly installed on the top of the connecting rod. An electric telescopic rod is fixedly installed on the top of the mounting plate. A connecting rod is fixedly installed on the bottom of the mounting plate. A connecting plate is fixedly installed on the bottom of the connecting rod. A calendering roller is rotatably connected to the inner side of the connecting plate.

[0009] A further improvement is that an air inlet slot is provided on the top of the drying chamber, and there are two heating devices symmetrically distributed on the inner wall of the drying chamber, which enables the raw materials to be dried quickly and conveniently, thereby enabling better manufacturing and production.

[0010] A further improvement is that the air guide pipe is made of a flexible hose, and there are two connecting rods, which are symmetrically distributed on the top of the air collecting hood. There are also two electric telescopic rods, which are symmetrically distributed on the top of the mounting plate. This allows for quick and convenient adjustment of the position of the air collecting hood and the calendering roller, thereby enabling better processing of raw materials of different thicknesses.

[0011] A further improvement is that the auxiliary mechanism includes a fixed plate, a second electric telescopic rod, a bearing plate, a damper, and a second connecting plate. The top of the fixed plate is connected to the bottom of the second electric telescopic rod, the top of the second electric telescopic rod is connected to the bottom of the bearing plate, the top of the bearing plate is connected to the bottom of the damper, and the top of the damper is connected to the bottom of the second connecting plate. A tension roller is rotatably connected to the inner side of the second connecting plate. A limit plate is fixedly installed on one side of the manufacturing box. A third electric telescopic rod is fixedly installed on the inner wall of the limit plate. A third connecting plate is fixedly installed at the bottom of the third electric telescopic rod, and a cleaning roller is rotatably connected to the inner side of the third connecting plate.

[0012] A further improvement is that there are four fixing plates, which are symmetrically distributed on both sides of the base. A spring is fixedly installed between the bottom of the connecting plate and the top of the bearing plate. There are two tension rollers, which are symmetrically distributed above the conveyor belt. This allows for quick and convenient adjustment of the position of the tension rollers, thereby enabling better adjustment of the tension of the raw material.

[0013] A further improvement is that there are two limiting plates, which are symmetrically distributed on one side of the manufacturing box, and two electric telescopic rods, which are symmetrically distributed on the inner walls of the two limiting plates. This allows for quick and convenient cleaning of dust and other impurities on the surfaces of raw materials of different thicknesses, thereby enabling better manufacturing.

[0014] A further improvement is that the inner side of the base is rotatably connected to both ends of the conveyor belt, the base is fitted inside the manufacturing box, and one side of the base is connected to one end of the fixing plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This gas diffusion layer manufacturing equipment enables the heating equipment inside the drying chamber to rapidly increase the air temperature. Combined with a hot air delivery system consisting of an extraction pump, air duct, and air collector, it can precisely guide hot air to the substrate on the conveyor belt surface. Compared to the single hot air outlet design of traditional equipment, the air collector expands the hot air coverage area, ensuring uniform heating of the substrate surface and avoiding problems such as substrate carbonization or incomplete drying caused by localized overheating. It can drive the calendering roller and the air collector to rise and fall synchronously. Because the air duct is made of a flexible hose, the hot air delivery is not affected during the rising and falling process. The calendering roller can closely adhere to the substrate surface, compacting the coating evenly. This avoids the problems of incomplete coating compaction or substrate damage caused by variations in substrate thickness in traditional fixed calendering structures, significantly improving the uniformity of the gas diffusion layer thickness and meeting the mass transfer efficiency requirements of fuel cells.

[0017] 2. This gas diffusion layer manufacturing equipment, through an auxiliary mechanism, enables the height adjustment of two sets of tension rollers via an electric telescopic rod, allowing for rapid position adjustment according to the substrate tension requirements. Simultaneously, a buffer structure is formed between the connecting plate and the support plate, consisting of springs and dampers. When tension fluctuations occur in the substrate during transport due to unwinding, rewinding, or coating, the tension rollers absorb these tension changes in real time through the elastic deformation of the springs and the damping effect of the dampers, maintaining the substrate in a stable tension state and preventing wrinkles, shifts, or breakage caused by sudden tension changes. The cleaning rollers, adjusted via an electric telescopic rod, can accommodate the surface cleaning needs of substrates of different thicknesses. Before the substrate enters the manufacturing chamber for drying and calendering, the cleaning rollers pre-remove fiber debris, dust, and other impurities from its surface, preventing impurities from being trapped between the coating and the substrate and affecting the adhesion, thus reducing the probability of defects such as pinholes and coating peeling in the finished product. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the manufacturing mechanism of this utility model. Figure 1 ;

[0021] Figure 4 This is a schematic diagram of the manufacturing mechanism of this utility model. Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the auxiliary mechanism of this utility model. Figure 1 ;

[0023] Figure 6 This is a schematic diagram of the auxiliary mechanism of this utility model. Figure 2 .

[0024] In the diagram: 1. Base; 2. Conveyor belt; 3. Manufacturing mechanism; 301. Manufacturing box; 302. Drying oven; 303. Dustproof net; 304. Heating equipment; 305. Extraction pump; 306. Air guide pipe; 307. Air collector hood; 308. Connecting rod one; 309. Mounting plate; 310. Electric telescopic rod one; 311. Connecting rod two; 312. Connecting plate one; 313. Calendering roller; 4. Auxiliary mechanism; 401. Fixing plate; 402. Electric telescopic rod two; 403. Bearing plate; 404. Damper; 405. Connecting plate two; 406. Tensioning roller; 407. Limiting plate; 408. Electric telescopic rod three; 409. Connecting plate three; 410. Cleaning roller. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6 This utility model provides a technical solution:

[0027] Example 1:

[0028] A gas diffusion layer manufacturing equipment includes a base 1 and a conveyor belt 2, with a manufacturing structure disposed above the base 1;

[0029] The manufacturing structure includes manufacturing mechanism 3 and auxiliary mechanism 4;

[0030] Manufacturing mechanism 3 includes manufacturing box 301, drying box 302, dustproof net 303, heating equipment 304, and extraction pump 305. The top of manufacturing box 301 is connected to the bottom of drying box 302. The inner wall of drying box 302 is connected to the top of dustproof net 303. The inner wall of drying box 302 is connected to one side of heating equipment 304. The inner wall of drying box 302 is connected to the bottom of extraction pump 305. A duct pipe 306 is connected to the bottom of extraction pump 305. A wind collector hood 307 is connected to the bottom of duct pipe 306. A connecting rod 1 308 is fixedly installed on the top of wind collector hood 307. An installation plate 309 is fixedly installed on the top of connecting rod 1 308. An electric telescopic rod 1 310 is fixedly installed on the top of installation plate 309. A connecting rod 2 311 is fixedly installed on the bottom of installation plate 309. A connecting plate 1 312 is fixedly installed on the bottom of connecting rod 2 311. A calendering roller 313 is rotatably connected to the inner side of connecting plate 1 312.

[0031] In this embodiment, the top of the drying chamber 302 is provided with an air inlet slot, and there are two heating devices 304. The heating devices 304 are symmetrically distributed on the inner wall of the drying chamber 302, so that the raw materials can be dried quickly and conveniently, thereby enabling better manufacturing and production.

[0032] Furthermore, the air guide pipe 306 is made of a flexible hose, and there are two connecting rods 308, which are symmetrically distributed on the top of the air collecting hood 307. There are also two electric telescopic rods 310, which are symmetrically distributed on the top of the mounting plate 309. This allows for quick and convenient adjustment of the positions of the air collecting hood 307 and the calendering roller 313, thereby enabling better processing of raw materials of different thicknesses.

[0033] Furthermore, the inner side of the base 1 is rotatably connected to both ends of the conveyor belt 2, the base 1 is fitted inside the manufacturing box 301, and one side of the base 1 is connected to one end of the fixing plate 401.

[0034] Heating equipment 304 uses a finned electric heater with a rated power of 3-5kW. During operation, it heats the air temperature inside the drying oven 302 to 80-120℃. The specific temperature is adjusted according to the substrate type and coating characteristics.

[0035] For carbon fiber paper substrates (areal density 10-20 g / m²), the temperature is set to 80-95℃ to avoid high temperature causing the substrate fibers to become brittle.

[0036] For carbon cloth substrates (area density 20-30 g / m²), the temperature is set to 95-120℃ to ensure that the PTFE emulsion in the coating is fully dried.

[0037] A platinum resistance temperature sensor (accuracy ±0.5℃) is installed on the inner wall of the drying oven 302 to monitor the temperature inside the oven in real time. When the temperature exceeds the set value ±5℃, the heating equipment is automatically triggered to cut off the power protection.

[0038] The 310 electric telescopic rod uses a ball screw type electric actuator with a rated stroke of 100-200mm and an adjustment accuracy of ±0.1mm. Its lifting action is linked to the thickness of the substrate.

[0039] When the substrate thickness is 50-100μm, the extension of the telescopic rod is 150-180mm, so that the distance between the air collector and the substrate surface is 10-15mm, and the contact pressure between the calender roll 313 and the substrate is 0.2-0.3MPa.

[0040] When the substrate thickness is 100-300μm, the extension of the telescopic rod is 100-150mm, the distance between the air collector and the substrate is adjusted to 8-12mm, and the contact pressure of the calendering roller is increased to 0.3-0.5MPa.

[0041] During the adjustment process, linear guide rails are set on both sides of the mounting plate 309 to prevent deviation during lifting and ensure that the pressure of the calendering roller is uniform along the width of the substrate.

[0042] When manufacturing is required, the operator places the raw materials onto the conveyor belt 2, and by starting the conveyor belt 2, the raw materials are transported into the manufacturing chamber 301. At this time, by starting the heating equipment 304, the air temperature inside the drying chamber 302 is increased. Then, by starting the extraction pump 305, the air inside the drying chamber 302 is transported to the air collection hood 307 through the air guide pipe 306, and the air collection hood 307 blows the air onto the surface of the raw materials, thereby improving the manufacturing process. By installing the dustproof net 303, the external air entering the drying chamber 302 is prevented from entering. Impurities are filtered out, effectively preventing damage to internal parts. By activating the electric telescopic rod 310, the mounting plate 309 moves, which in turn moves the air collecting hood 307 and the calendering roller 313. This allows for quick and convenient adjustment of the height of the air collecting hood 307 and the calendering roller 313, thus enabling better drying of raw materials of different thicknesses. The calendering roller 313 can fit raw materials of different thicknesses, and the coating on the raw materials can be calendered through the calendering roller 313, thereby improving manufacturing processes.

[0043] Example 2:

[0044] Based on Embodiment 1, the auxiliary mechanism 4 includes a fixed plate 401, an electric telescopic rod 402, a bearing plate 403, a damper 404, and a connecting plate 405. The top of the fixed plate 401 is connected to the bottom of the electric telescopic rod 402, the top of the electric telescopic rod 402 is connected to the bottom of the bearing plate 403, the top of the bearing plate 403 is connected to the bottom of the damper 404, the top of the damper 404 is connected to the bottom of the connecting plate 405, a tension roller 406 is rotatably connected to the inner side of the connecting plate 405, a limit plate 407 is fixedly installed on one side of the manufacturing box 301, an electric telescopic rod 408 is fixedly installed on the inner wall of the limit plate 407, a connecting plate 409 is fixedly installed at the bottom of the electric telescopic rod 408, and a cleaning roller 410 is rotatably connected to the inner side of the connecting plate 409.

[0045] In this embodiment, there are four fixing plates 401, which are symmetrically distributed on both sides of the base 1. A spring is fixedly installed between the bottom of the connecting plate 405 and the top of the bearing plate 403. There are two tension rollers 406, which are symmetrically distributed above the conveyor belt 2. This allows for quick and convenient adjustment of the position of the tension rollers 406, thereby enabling better adjustment of the tension of the raw material.

[0046] Furthermore, there are two limiting plates 407, which are symmetrically distributed on one side of the manufacturing box 301. There are also two electric telescopic rods 408, which are symmetrically distributed on the inner walls of the two limiting plates 407. This allows for quick and convenient cleaning of dust and other impurities on the surface of raw materials of different thicknesses, thereby enabling better manufacturing.

[0047] The rated stroke of the electric telescopic pole 2402 is 80-150mm, with an adjustment accuracy of ±0.1mm. The adjustment range is set according to the tension requirements of the substrate.

[0048] When the substrate conveying line speed is 8-12m / min, the extension of the telescopic rod is 120-150mm, and the tension of the tension roller 406 on the substrate is controlled at 5-8N;

[0049] When the linear speed is 12-15m / min, the elongation is 80-120mm, and the tension is increased to 8-12N to prevent the substrate from slipping due to high-speed conveying.

[0050] The spring between the connecting plate 405 and the bearing plate 403 is a cylindrical helical compression spring with a stiffness coefficient of 5-8 N / mm. The damper 404 has a damping coefficient of 10-15 N・s / m. The two work together to absorb tension fluctuations (such as tension fluctuations of ±3 N caused by changes in the winding diameter during unwinding) within 0.5 s, and maintain stable tension.

[0051] The tension roller, made of 406 stainless steel, is coated with a polyurethane layer with a Shore hardness of 70-80, and the layer thickness is 5-8mm. The parallelism error between its axis and the axis of the conveyor belt is ≤0.1mm / m to prevent the substrate from running off-center due to roller tilt. The conveyor belt is a polyester synchronous belt with a Teflon coating (friction coefficient 0.1-0.15). The conveying speed is controlled by a servo motor with an accuracy of ±0.05m / min, matching the speed of the tension roller (100-200r / min) to prevent relative slippage.

[0052] The rated stroke of the electric telescopic pole 3408 is 50-100mm, with an adjustment accuracy of ±0.1mm. Its extension is adjusted according to the thickness of the base material.

[0053] When the substrate thickness is 50-100μm, the telescopic rod extends 80-100mm, so that the contact pressure between the cleaning roller 410 and the substrate is 0.1-0.2MPa;

[0054] When the thickness is 100-300μm, the elongation is 50-80mm and the contact pressure is 0.2-0.3MPa.

[0055] The surface of the cleaning roller is covered with a microfiber cleaning cloth (fiber diameter 5-10μm) with a cloth density of 300-400g / m², which can effectively adsorb fiber debris (particle size ≥1μm) and dust on the substrate surface. The cleaning cloth needs to be replaced every 8 hours of operation to avoid secondary contamination by impurities.

[0056] When manufacturing is required, the operator places the raw materials onto the conveyor belt 2 and starts the conveyor belt 2 to transport the raw materials into the manufacturing box 301. At this time, the electric telescopic rod 402 is activated to move the support plate 403. The movement of the support plate 403 indirectly drives the tension roller 406 to move. The movement of the two tension rollers 406 allows for quick and convenient adjustment of the tension of the raw materials, thus enabling better manufacturing. A spring is installed between the tension roller 406 and the support plate 403, which allows for spring movement during the raw material manufacturing process. When the tension changes, the tension roller 406 moves while squeezing the spring and damper 404, so that the tension roller 406 always keeps in contact with the raw material, avoiding tension fluctuations in the raw material and affecting normal manufacturing. Before the raw material enters the manufacturing box 301, the electric telescopic rod 3 408 is activated to drive the connecting plate 3 409 to move. The movement of the connecting plate 3 409 drives the cleaning roller 410 to move, so that the cleaning roller 410 comes into contact with the raw material. The rotation of the cleaning roller 410 can remove dust and other impurities on the raw material, thereby enabling better manufacturing.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A gas diffusion layer manufacturing apparatus, comprising a base (1) and a conveyor belt (2), characterized in that: A manufacturing structure is provided above the base (1); The manufacturing structure includes a manufacturing mechanism (3) and an auxiliary mechanism (4). The manufacturing mechanism (3) includes a manufacturing box (301), a drying box (302), a dustproof net (303), a heating device (304), and a pump (305). The top of the manufacturing box (301) is connected to the bottom of the drying box (302). The inner wall of the drying box (302) is connected to the top of the dustproof net (303). The inner wall of the drying box (302) is connected to one side of the heating device (304). The inner wall of the drying box (302) is connected to the bottom of the pump (305). A gas guide pipe (305) is connected to the bottom of the pump (305). 6) The bottom of the air duct (306) is connected to an air collecting hood (307). A connecting rod (308) is fixedly installed on the top of the air collecting hood (307). An installation plate (309) is fixedly installed on the top of the connecting rod (308). An electric telescopic rod (310) is fixedly installed on the top of the installation plate (309). A connecting rod (311) is fixedly installed on the bottom of the installation plate (309). A connecting plate (312) is fixedly installed on the bottom of the connecting rod (311). A calendering roller (313) is rotatably connected to the inner side of the connecting plate (312).

2. The gas diffusion layer manufacturing equipment according to claim 1, characterized in that: The top of the drying chamber (302) is provided with an air inlet slot, and there are two heating devices (304), which are symmetrically distributed on the inner wall of the drying chamber (302).

3. The gas diffusion layer manufacturing equipment according to claim 1, characterized in that: The air duct (306) is made of a flexible hose. There are two connecting rods (308), which are symmetrically distributed on the top of the air collector hood (307). There are two electric telescopic rods (310), which are symmetrically distributed on the top of the mounting plate (309).

4. The gas diffusion layer manufacturing equipment according to claim 1, characterized in that: The auxiliary mechanism (4) includes a fixed plate (401), an electric telescopic rod II (402), a bearing plate (403), a damper (404), and a connecting plate II (405). The top of the fixed plate (401) is connected to the bottom of the electric telescopic rod II (402). The top of the electric telescopic rod II (402) is connected to the bottom of the bearing plate (403). The top of the bearing plate (403) is connected to the bottom of the damper (404). The top of the damper (404) is connected to the bottom of the connecting plate II (405). A tension roller (406) is rotatably connected to the inner side of the connecting plate II (405). A limit plate (407) is fixedly installed on one side of the manufacturing box (301). An electric telescopic rod III (408) is fixedly installed on the inner wall of the limit plate (407). A connecting plate III (409) is fixedly installed at the bottom of the electric telescopic rod III (408). A cleaning roller (410) is rotatably connected to the inner side of the connecting plate III (409).

5. The gas diffusion layer manufacturing equipment according to claim 4, characterized in that: There are four fixed plates (401), which are symmetrically distributed on both sides of the base (1). A spring is fixedly installed between the bottom of the connecting plate (405) and the top of the bearing plate (403). There are two tension rollers (406), which are symmetrically distributed above the conveyor belt (2).

6. The gas diffusion layer manufacturing equipment according to claim 4, characterized in that: There are two limiting plates (407), which are symmetrically distributed on one side of the manufacturing box (301). There are two electric telescopic rods (408), which are symmetrically distributed on the inner walls of the two limiting plates (407).

7. The gas diffusion layer manufacturing equipment according to claim 1, characterized in that: The inner side of the base (1) is rotatably connected to both ends of the conveyor belt (2). The base (1) is fitted inside the manufacturing box (301). One side of the base (1) is connected to one end of the fixing plate (401).

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