A fastening device during assembly of a PEM electrolyser

Abstract

The application relates to the technical field of PEM electrolytic cell assembly, and particularly discloses a fastening device in a PEM electrolytic cell assembly process, which comprises a machining table, the top of the machining table is provided with two fixed plates, the top of the two fixed plates is jointly provided with a horizontal plate, the horizontal plate is provided with a fastening mechanism, the top of the machining table is provided with a plurality of placing seats, the top of the machining table is provided with a spraying mechanism at a middle position, the top of the machining table is slidably provided with four moving plates, and the top of each of the four moving plates is provided with a limiting mechanism for guiding and limiting electrolytic cell related components. When the plurality of connecting screw rods and nuts of the electrolytic cell need to be fastened, the fastening mechanism can automatically replace manual fastening treatment of the connecting screw rods and nuts, various disadvantages caused by manual fastening can be avoided, the pre-tightening force of each connecting screw rod can be ensured to be consistent, and the efficiency of electrolytic cell assembly is improved.

Description

Technical Field

[0001] This invention relates to the field of PEM electrolytic cell assembly technology, and more specifically to a fastening device in the assembly process of a PEM electrolytic cell. Background Technology

[0002] A PEM electrolyzer is a core device for electrocatalytic water splitting to produce hydrogen based on proton exchange membrane technology. It is one of the mainstream types of water electrolysis hydrogen production technology and is widely used in green hydrogen production, energy storage, and fuel cell applications due to its advantages such as fast start-up, high efficiency, compact size, and compatibility with renewable energy sources. Since the core working unit of a PEM electrolyzer is a single cell, and the actual stack needs to be composed of dozens to hundreds of tightly stacked single cells, multiple connecting screws are arranged in a uniform distribution to transmit the pressure of the end plates to each layer of single cells. This ensures that the stack is secure and without misalignment, preventing gas leakage or current conduction interruption due to local gaps.

[0003] In existing PEM electrolytic cell assembly processes, the tightening of multiple connecting screws typically involves manual tightening of each screw and its corresponding nut. When tightening manually, the preload force depends solely on the worker's strength and habits, making effective control impossible. While electric wrenches can quickly tighten multiple connecting screws and nuts, differences in the friction coefficient between the connecting screws and the connected components, as well as wrench precision issues, can still lead to significant deviations in clamping force, making it difficult to ensure consistent preload force for each connecting screw. Furthermore, when tightening connecting screws for multiple electrolytic cells, the labor intensity is high and work efficiency is low. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a fastening device for the assembly process of a PEM electrolytic cell.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fastening device for the assembly process of a PEM electrolytic cell includes a processing table. Two fixed plates are mounted on the top of the processing table, and a horizontal plate is mounted on the top of both fixed plates. A fastening mechanism for automatically fastening multiple nuts during the electrolytic cell assembly process is provided on the horizontal plate. Multiple placement seats for placing connecting screws are provided on the top of the processing table. A spraying mechanism for automatically applying a high-temperature anti-seize agent to the surface of the connecting screws placed inside the multiple placement seats is installed at the center of the top of the processing table. Four movable plates are slidably mounted on the top of the processing table, and each of the four movable plates has a limiting mechanism for guiding and limiting the movement of related components of the electrolytic cell.

[0007] Optionally, the top of each of the two fixed plates is provided with a first sliding groove, the inside of each of the two first sliding grooves is provided with a first slider, the top of each of the two first sliders is provided with a vertical rod, and the top of each of the two vertical rods is connected to the horizontal plate.

[0008] Optionally, the fastening mechanism includes a telescopic cylinder mounted on the top of the horizontal plate, the telescopic end of the telescopic cylinder passing through the horizontal plate and connected to a first drive motor, and an installation block mounted on the output end of the first drive motor.

[0009] Optionally, a first electric telescopic rod is installed on each of the four sides of the mounting block, a second drive motor is installed on the telescopic end of each of the four first electric telescopic rods, and a sleeve is installed on the output end of each of the four second drive motors. The sleeve has a hexagonal groove inside that matches the nut.

[0010] Optionally, a mounting frame is installed at the bottom of the processing table, and multiple third drive motors are installed at the top of the mounting frame. The output ends of the multiple third drive motors are each equipped with a second electric telescopic rod, and the telescopic ends of the multiple second electric telescopic rods are connected to their adjacent placement seats.

[0011] Optionally, the spraying mechanism includes a third electric telescopic rod installed at the center of the top of the mounting frame. The telescopic end of the third electric telescopic rod passes through the processing table and is connected to a circular plate with a hollow interior. The outer wall of the circular plate is fitted with a flexible hose for connecting to the output end of an externally preset spraying device.

[0012] Optionally, the outer walls of the multiple placement seats are fitted with rings, the inner walls of the multiple rings are provided with multiple spray holes, the multiple rings are connected and fixed to each other by a first connecting pipe, and the outer wall of the circular plate is equipped with four second connecting pipes, the ends of the four second connecting pipes away from the circular plate are connected to the rings that are close to them.

[0013] Optionally, the top of the processing table is provided with four sets of second slide grooves, each set of four second slide grooves is equipped with a second slider, and the top of each set of four second sliders is connected and fixed to a moving plate adjacent to it.

[0014] Optionally, the limiting mechanism includes a third slide groove opened on the top of the four movable plates, a third slider installed inside each of the four third slide grooves, and a movable frame connected to the top of each of the four third sliders via a fourth electric telescopic rod. Two support plates are installed on one outer wall of each of the four movable frames, and a rotating plate is rotatably installed between the two support plates.

[0015] Optionally, the rotating plate is hollow, with rubber pads and sponge pads installed on its two outer walls respectively. Multiple drainage holes are provided on the outer wall of the rotating plate near the sponge pad, and connecting ends and multiple industrial cameras are provided on the other two outer walls respectively.

[0016] The beneficial effects of this invention are:

[0017] 1. In this invention, when it is necessary to tighten multiple connecting screws and nuts of an electrolytic cell, the tightening mechanism can automatically tighten the connecting screws and nuts instead of manually, avoiding the various drawbacks of manual tightening, and ensuring that the preload of each connecting screw is consistent, thereby improving the efficiency of electrolytic cell assembly.

[0018] 2. In this invention, after placing multiple connecting screws inside their respective mounting bases, the oil and other impurities on the surface of the connecting screws can be automatically cleaned by the cooperation between the four rotating plates and the sponge pads. Furthermore, the four third sliders can move within their respective third grooves, causing the sponge pads to come into contact with and be squeezed against their outer walls. This allows the four sponge pads, along with the anhydrous ethanol adsorbed inside, to automatically clean the outer walls of all the connecting screws, ensuring that the quality of the subsequent electrolytic cell assembly meets the standards and reducing the adverse effects of oil and other impurities on the outer walls of the connecting screws on the electrolytic cell assembly.

[0019] 3. In this invention, after cleaning and removing oil and other impurities from the surfaces of multiple connecting screws, the quality of the connecting screw surfaces is inspected by the cooperation of four rotating plates and multiple industrial cameras. Based on the results of the surface quality inspection of multiple connecting screws, if some connecting screws have surface defects, the extension end of the second electric telescopic rod at the bottom of the corresponding placement seat can be controlled to extend upward, driving the connecting screw to move upward and adjust. This allows workers near the processing table or pre-set visual inspection equipment to quickly identify the defective connecting screws and remove them from the corresponding placement seat to replace them with new connecting screws, thus avoiding the problem of surface defects of the connecting screws affecting the subsequent assembly quality of the electrolytic cell.

[0020] 4. In this invention, after ensuring that there are no quality problems on the surfaces of multiple connecting screws and cleaning the surfaces of multiple connecting screws, multiple nozzles on the inner walls of multiple rings can be controlled to spray high-temperature anti-seize agent outward onto the surface of the connecting screws. At the same time, the telescopic end of the third electric telescopic rod is slowly extended upward, so that the multiple nozzles on the inner walls of multiple rings can evenly spray the high-temperature anti-seize agent onto the surface of multiple connecting screws. This avoids the phenomenon of metal friction between the connecting screws and related components of the electrolytic cell, which would cause seizing and adhesion, when the nuts and connecting screws are tightened later. Attached Figure Description

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of a fastening device in the assembly process of a PEM electrolytic cell proposed in this invention.

[0023] Figure 2 This is a schematic diagram of the structure in this invention where the fastening mechanism moves to a position away from the processing table;

[0024] Figure 3 This is a schematic diagram of the structure of the bottom of the processing table in this invention;

[0025] Figure 4 This is a schematic diagram of the structure of multiple placement seats and rings located on the top of the processing table in this invention;

[0026] Figure 5 This is a schematic diagram of the structure of the horizontal plate and the telescopic cylinder in this invention;

[0027] Figure 6 This is a schematic diagram of the fastening mechanism in this invention;

[0028] Figure 7 This is a schematic diagram of the structure after the third electric telescopic rod pushes multiple rings upward in this invention;

[0029] Figure 8 This is a schematic diagram of the spraying mechanism in this invention;

[0030] Figure 9 This is a schematic diagram of the limiting mechanism in this invention;

[0031] Figure 10 This is a schematic diagram of the structure of one of the rotating plates in this invention.

[0032] In the diagram: 1. Processing table; 2. Fixed plate; 3. Vertical rod; 4. Horizontal plate; 5. Telescopic cylinder; 6. Sleeve; 7. First slide groove; 8. Second slide groove; 9. Moving plate; 10. First slider; 11. Placement seat; 12. Ring; 13. Mounting frame; 14. Third drive motor; 15. Third electric telescopic rod; 16. First drive motor; 17. Mounting block; 18. First electric telescopic rod; 19. Second drive motor; 20. Second connecting pipe; 21. Second electric telescopic rod; 22. Circular plate; 23. Hose; 24. First connecting pipe; 25. Spray hole; 26. Second slider; 27. Third slide groove; 28. Third slider; 29. ​​Fourth electric telescopic rod; 30. Moving frame; 31. Rotating plate; 32. Connecting end; 33. Support plate; 34. Industrial camera; 35. Drain hole; 36. Sponge pad; 37. Rubber pad. Detailed Implementation

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Reference Figures 1-10 A fastening device for the assembly process of a PEM electrolytic cell includes a processing table 1. Two fixed plates 2 are installed on the top of the processing table 1. A horizontal plate 4 is installed on the top of the two fixed plates 2. The horizontal plate 4 is provided with a fastening mechanism for automatically fastening multiple nuts during the assembly process of the electrolytic cell. Multiple placement seats 11 for placing connecting screws are provided on the top of the processing table 1. A spraying mechanism for automatically applying high-temperature anti-seize agent to the surface of the connecting screws placed inside the multiple placement seats 11 is installed at the center of the top of the processing table 1. Four movable plates 9 are slidably installed on the top of the processing table 1. Each of the four movable plates 9 is provided with a limiting mechanism for guiding and limiting the relevant components of the electrolytic cell.

[0035] As a technical optimization of the present invention, each of the two fixed plates 2 has a first sliding groove 7 on its top. A first slider 10 is installed inside each of the two first sliding grooves 7, and a vertical rod 3 is installed at the top of each of the two first sliders 10. The tops of the two vertical rods 3 are connected to the horizontal plate 4. A first linear motor is pre-installed inside each of the two first sliding grooves 7. The two first linear motors can drive the two first sliders 10 to move back and forth inside the two first sliding grooves 7, thereby causing the two vertical rods 3 and the horizontal plate 4 to move back and forth on the top of the two fixed plates 2 for adjustment.

[0036] As a technical optimization of the present invention, the fastening mechanism includes a telescopic cylinder 5 installed on the top of the horizontal plate 4. The telescopic end of the telescopic cylinder 5 passes through the horizontal plate 4 and is connected to a first drive motor 16. An installation block 17 is installed on the output end of the first drive motor 16. During the telescopic process, the telescopic end of the telescopic cylinder 5 can drive the first drive motor 16 and the installation block 17 to move up and down synchronously for adjustment; the first drive motor 16 can drive the installation block 17 to rotate for adjustment.

[0037] As a technical optimization of the present invention, each of the four sides of the mounting block 17 is equipped with a first electric telescopic rod 18. Each of the four telescopic ends of the first electric telescopic rods 18 is equipped with a second drive motor 19. Each of the four output ends of the second drive motors 19 is equipped with a sleeve 6. The sleeve 6 has a hexagonal groove inside that matches the nut. During the telescopic process, the telescopic ends of the four first electric telescopic rods 18 can drive the corresponding second drive motor 19 and the sleeve 6 to move and adjust synchronously. The four second drive motors 19 can drive the corresponding sleeve 6 to rotate and adjust. Each sleeve 6 has a pre-set permanent magnet inside, so that the nut, after being placed inside the hexagonal groove, is magnetically attracted to the sleeve 6, preventing it from falling downwards from the hexagonal groove.

[0038] As a technical optimization of the present invention, a mounting frame 13 is installed at the bottom of the processing table 1, and multiple third drive motors 14 are installed at the top of the mounting frame 13. Each of the output ends of the multiple third drive motors 14 is equipped with a second electric telescopic rod 21, and the telescopic ends of the multiple second electric telescopic rods 21 are connected to their adjacent placement seats 11. The multiple third drive motors 14 can drive the corresponding second electric telescopic rods 21 and placement seats 11 to rotate synchronously for adjustment; during the telescopic process, the telescopic ends of the multiple second electric telescopic rods 21 can drive the corresponding placement seats 11 to move up and down for adjustment.

[0039] As a technical optimization of the present invention, the spraying mechanism includes a third electric telescopic rod 15 installed at the center of the top of the mounting frame 13. The telescopic end of the third electric telescopic rod 15 passes through the processing table 1 and is connected to a hollow circular plate 22. A flexible hose 23 is installed on the outer wall of the circular plate 22 for connecting to the output end of a preset external spraying equipment. During the telescopic process, the telescopic end of the third electric telescopic rod 15 can drive the circular plate 22 to move up and down on the top of the processing table 1 for adjustment. The length of the flexible hose 23 in actual use is much greater than the length shown in the attached figure, so that it can accommodate the maximum extension state of the telescopic end of the third electric telescopic rod 15.

[0040] As a technical optimization of the present invention, the outer walls of multiple placement seats 11 are fitted with rings 12, and the inner walls of multiple rings 12 are provided with multiple spray holes 25. The multiple rings 12 are connected and fixed to each other by a first connecting pipe 24. The outer wall of the circular plate 22 is equipped with four second connecting pipes 20, and the ends of the four second connecting pipes 20 away from the circular plate 22 are connected to the rings 12 that are close to them. After the externally preset spraying equipment is started, it extracts the high-temperature anti-galling agent and discharges it through the output end into the hose 23. After being transported into the circular plate 22 through the hose 23, the multiple second connecting pipes 20 and the first connecting pipes 24 cooperate with each other so that the interior of the multiple rings 12 is filled with high-temperature anti-galling agent, and then sprays it outward to the surface of the connecting screw through the multiple spray holes 25 on the inner wall.

[0041] As a technical optimization of the present invention, the top of the processing table 1 is provided with four sets of second slide grooves 8, and each of the four sets of second slide grooves 8 is equipped with a second slider 26. The top of each of the four sets of second sliders 26 is connected and fixed to a nearby movable plate 9. Each of the four sets of second slide grooves 8 is equipped with a second linear motor, which can drive the four sets of second sliders 26 to move back and forth within the corresponding second slide groove 8, thereby driving the four movable plates 9 to move back and forth on the top of the processing table 1 for adjustment.

[0042] As a technical optimization of the present invention, the limiting mechanism includes third slide grooves 27 opened on the top of four movable plates 9. Each of the four third slide grooves 27 has a third slider 28 installed inside. The top of each of the four third sliders 28 is connected to a movable frame 30 via a fourth electric telescopic rod 29. Two support plates 33 are installed on one outer wall of each of the four movable frames 30, and a rotating plate 31 is rotatably mounted between the two support plates 33. A third linear motor is pre-installed inside each of the four third slide grooves 27. The four third linear motors can drive the four third sliders 28 to move back and forth within their respective third slide grooves 27, thereby synchronously moving and adjusting the four fourth electric telescopic rods 29, the movable frame 30, and the rotating plate 31. During the extension and retraction process, the telescopic ends of the four fourth electric telescopic rods 29 can synchronously drive the movable frame 30 to move up and down. A driving device is pre-installed on the top of each of the four support plates 33. The output ends of the four driving devices are respectively connected to the rotating parts at the top of the four rotating plates 31, thereby enabling the four rotating plates 31 to rotate and adjust between their corresponding two support plates 33.

[0043] As a technical optimization of the present invention, the rotating plate 31 is hollow. Rubber pads 37 and sponge pads 36 are respectively installed on the outer walls of one side of the rotating plate 31. Multiple drainage holes 35 are provided on the outer wall of the rotating plate 31 near the sponge pads 36. Connecting ends 32 and multiple industrial cameras 34 are respectively provided on the other two outer walls of the rotating plate 31. A drainage device is pre-installed below the processing table 1. The output end of this drainage device is connected to four connecting ends 32 via four connecting pipes, allowing the external drainage device to deliver anhydrous ethanol and leak detection liquid into the interior of the four rotating plates 31, and discharge them through the multiple drainage holes 35 into the interior of the sponge pads 36 for temporary absorption and storage. The multiple industrial cameras 34 are all Epic Eye Pro-20MP industrial cameras in the prior art.

[0044] In this invention, when the user uses the device, the entire device is as follows: Figure 2As shown, the two first sliders 10 drive the horizontal plate 4 and multiple components of the fastening mechanism to move away from the processing table 1. Then, the multiple connecting screws are picked up in sequence by manual operation or with the help of a pre-set robotic arm near the processing table 1, and the screw heads are placed inside the multiple placement seats 11. Next, the components of multiple electrolytic cells are sequentially fitted onto the surfaces of the multiple connecting screws, and multiple nuts are sequentially placed inside the multiple sleeves 6. The two first sliders 10 are controlled to drive the horizontal plate 4 and multiple components of the fastening mechanism to move directly above the processing table 1, so that the four sleeves 6 are also positioned directly above the four connecting screws. The telescopic end of the telescopic cylinder 5 is controlled to extend downward, driving the four The nuts inside the sleeve 6 abut against the connecting screws. With the help of four second drive motors 19, the corresponding sleeves 6 and nuts rotate, and the telescopic cylinder 5 slowly extends downward, so that the four nuts are threadedly connected to the corresponding connecting screws and automatically tightened. Then, the two first sliders 10 are controlled to move multiple components of the fastening mechanism to a position away from the processing table 1, and then the four nuts are placed inside the four sleeves 6. The above steps of automatically tightening the nuts to the connecting screws are repeated, so that the other four nuts are threadedly connected to the corresponding connecting screws and tightened, achieving the effect of automatically tightening multiple connecting screws and nuts of the assembled electrolytic cell, thus improving the efficiency of electrolytic cell assembly.

[0045] After placing the multiple connecting screws inside the corresponding placement seats 11, to ensure the surfaces of the multiple connecting screws are relatively clean and to avoid oil stains and other impurities adhering to the surfaces of the multiple connecting screws, which would affect the quality of subsequent electrolytic cell assembly, an externally preset drainage device can be controlled to deliver anhydrous ethanol to the interior of the four rotating plates 31, and discharge it through multiple drainage holes 35 into the interior of the sponge pads 36 for adsorption and temporary storage. Then, the four rotating plates 31 are controlled to rotate 180 degrees between the corresponding two support plates 33, driving the four sponge pads 36 to rotate to a closer position. Then, the four sets of second sliders 26 are controlled to move within the corresponding second sliding grooves 8. The part moves towards the placement seat 11 and simultaneously controls the four third sliders 28 to move and adjust inside the corresponding third slide grooves 27, so that the four moving plates 9 can drive the corresponding rotating plates 31 and sponge pads 36 to abut against the outer walls of the four connecting screws. At this time, the anhydrous ethanol adsorbed inside the sponge pads 36 can contact the outer walls of the connecting screws. With the help of multiple third drive motors 14, multiple placement seats 11 and connecting screws are driven to rotate synchronously, so that the anhydrous ethanol can be evenly applied to the surface of the connecting screws. With the squeezing and friction between the sponge pads 36 and the outer walls of the connecting screws, the oil stains and other impurities on the surface of the connecting screws can be automatically cleaned.

[0046] Other connecting screws on the same straight line can move inside the corresponding third slide groove 27 with the help of four third sliders 28, causing the sponge pad 36 to come into contact with and be squeezed against its outer wall. This allows the four sponge pads 36, together with the anhydrous ethanol adsorbed inside, to automatically clean the outer wall of all connecting screws, ensuring that the quality of subsequent electrolytic cell assembly meets the standards and reducing the adverse effects of oil stains and other impurities on the outer wall of the connecting screws on the electrolytic cell assembly.

[0047] After cleaning and removing oil and other impurities from the surfaces of multiple connecting screws, four sets of second sliders 26 can be controlled to move away from each other inside the corresponding second slide grooves 8, driving four moving plates 9 and other components to move and adjust together. Then, four rotating plates 31 can be controlled to rotate 90 degrees between the corresponding two support plates 33, driving the outer wall of the four rotating plates 31 on one side, where multiple industrial cameras 34 are mounted, to rotate to a closer position. At this time, the quality of the connecting screw surface can be detected by the multiple industrial cameras 34 on the four rotating plates 31.

[0048] Simultaneously, multiple third drive motors 14 are controlled to rotate and adjust multiple placement seats 11 and connecting screws, and four third sliders 28 are controlled to move and adjust within their corresponding third slide grooves 27. This allows multiple industrial cameras 34 on the four rotating plates 31 to automatically detect the surface quality of all connecting screws. Based on the results of the surface quality detection of multiple connecting screws, if some connecting screws have surface defects, the second electric telescopic rod 21 at the bottom of the corresponding placement seat 11 can be controlled to extend upwards, causing the connecting screw to move upwards together. This allows workers near the processing table 1 or pre-set visual inspection equipment to quickly identify the defective connecting screws and remove them from the corresponding placement seat 11 to replace them with new connecting screws, thus avoiding the problem of surface defects in connecting screws affecting the subsequent assembly quality of the electrolytic cell.

[0049] After ensuring that the surfaces of the multiple connecting screws are free of quality problems and after cleaning the surfaces of the multiple connecting screws, the externally preset spraying equipment can be started to extract the high-temperature anti-seize agent and discharge it through the output end into the hose 23. After being transported to the inside of the circular plate 22 through the hose 23, the multiple second connecting pipes 20 and the first connecting pipe 24 cooperate with each other to make the multiple rings 12 filled with high-temperature anti-seize agent and then sprayed outwards to the surface of the connecting screws through the multiple spray holes 25 on the inner wall. At the same time, the telescopic end of the third electric telescopic rod 15 is controlled to slowly extend upwards, so that the multiple spray holes 25 on the inner wall of the multiple rings 12 can evenly spray the high-temperature anti-seize agent onto the surface of the multiple connecting screws, so as to avoid the metal friction between the connecting screws and the related components of the electrolytic cell during the subsequent tightening of the nuts and connecting screws, which would cause seizing and adhesion.

[0050] After applying the high-temperature anti-seize agent to the surface of multiple connecting screws, multiple rotating plates 31 can be controlled to rotate between the corresponding two support plates 33 in their original state, that is, the side of the multiple rotating plates 31 with rubber pads 37 is close to the connecting screws. Then, four sets of second sliders 26 can be controlled to drive the moving plate 9 to move towards the connecting screws inside the corresponding second slide grooves 8, thereby driving the four rotating plates 31 to move to a position that matches the width of the electrolytic cell components to be assembled later. This allows for quick alignment when the electrolytic cell components are fitted onto the surface of multiple connecting screws by manual labor or robotic arms, improving the assembly efficiency of multiple electrolytic cell components.

[0051] When electrolytic cell components of different widths are fitted onto the surfaces of multiple connecting screws, the telescopic ends of the four fourth electric telescopic rods 29 can be controlled to extend upwards, thereby driving the height of the four rotating plates 31 and the rubber pads 37 to be adjusted upwards. This, in conjunction with the four sets of second sliders 26, moves and adjusts within the corresponding second slide grooves 8 towards the direction of the electrolytic cell components, ensuring that the four rotating plates 31 cooperate with the corresponding rubber pads 37, enabling them to abut, limit, and guide the assembly of the four sides of the electrolytic cell components of different widths.

[0052] After all the electrolytic cell components are mounted on the surfaces of the multiple connecting screws, the four sets of second sliders 26, rotating plates 31 and rubber pads 37 can also be engaged to clamp and limit the four sides of the assembled electrolytic cell components. This ensures the stability of the multiple electrolytic cell components when the fastening mechanism connects the nuts to the connecting screws, thus providing an auxiliary benefit to the assembly of the electrolytic cell and facilitating the rapid, stable and efficient assembly of the electrolytic cell.

[0053] After all the nuts and connecting screws are tightened using the fastening mechanism, the assembly of the electrolytic cell is completed simultaneously. To ensure that the internal sealing of the assembled electrolytic cell meets the standards, the four rotating plates 31 can be rotated 180 degrees within their respective two support plates 33. This rotates the side of the four rotating plates 31 with the sponge pads 36 closer to the electrolytic cell. Then, the drainage pressure of the externally preset drainage device is increased, and the anhydrous ethanol is replaced with a leak detection solution, causing the multiple drainage holes 35 on one side of the four rotating plates 31 to open. Leak detection fluid can be sprayed outwards onto the four sides of the assembled electrolytic cell. The four third sliders 28 move horizontally within their corresponding third grooves 27, facilitating comprehensive spraying of the leak detection fluid onto all four sides of the electrolytic cell. Subsequently, high-pressure gas is introduced into the electrolytic cell. If continuous bubbles are generated on the outer wall of the electrolytic cell, and the size of the bubbles is observed, a continuous stream of small bubbles indicates a micro-leak, while a large number of bubbles indicates a serious leak. This achieves rapid testing of the sealing performance of the assembled electrolytic cell, eliminating the need for additional testing of its sealing performance and improving the efficiency of electrolytic cell production.

[0054] And after testing the assembly and sealing performance of the electrolytic cell, such as Figure 2 As shown, the two first sliders 10 are controlled again to move the horizontal plate 4 and multiple components of the fastening mechanism to a position away from the processing table 1. At this time, the extension end of the third electric telescopic rod 15 can be extended upward, and multiple rings 12 can be moved upward synchronously. During this process, the assembled electrolytic cell can be automatically pushed upward from inside multiple placement seats 11, making it convenient for workers near the processing table 1 or preset robotic arms to pick up and unload the material, further improving the efficiency of electrolytic cell production and processing.

[0055] Since multiple placement seats 11 can be driven to rotate by corresponding third drive motors 14, if the second drive motor 19 of the fastening mechanism malfunctions during use, it will be unable to drive the corresponding sleeve 6 to rotate, thus failing to automatically tighten the nut and the connecting screw. In this case, after the sleeve 6 drives the nut inside it to move downwards to abut against the top of the connecting screw, the corresponding third drive motor 14 drives the connecting screw to rotate. With the extension end of the telescopic cylinder 5, the sleeve 6 and the nut inside it are slowly moved downwards, which can still achieve the threaded connection and tightening between the connecting screw and the nut, avoiding any impact on the assembly efficiency of the electrolytic cell.

[0056] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A fastening device in the assembly process of a PEM electrolyser cell, comprising a working table (1), characterised in that, The top of the machining table (1) is provided with two fixed plates (2), the top of the two fixed plates (2) is provided with a horizontal plate (4) in common, the horizontal plate (4) is provided with a fastening mechanism for automatically fastening a plurality of nuts in the electrolytic cell assembly process, the top of the machining table (1) is provided with a plurality of placement seats (11) for placing connecting screws, the top of the machining table (1) is centrally provided with a spraying mechanism for automatically spraying high-temperature anti-seizure agent on the surface of the connecting screw placed in the plurality of placement seats (11), and the top of the machining table (1) is slidably provided with four moving plates (9), and the top of each of the four moving plates (9) is provided with a limiting mechanism for guiding and limiting the electrolytic cell related parts. The bottom of the machining table (1) is provided with a mounting bracket (13), the top of the mounting bracket (13) is provided with a plurality of third driving motors (14), the output ends of the plurality of third driving motors (14) are provided with second electric telescopic rods (21), and the telescopic ends of the plurality of second electric telescopic rods (21) are connected with the placement seats (11) close to them. The spraying mechanism comprises a third electric telescopic rod (15) mounted at the central position of the top of the mounting bracket (13), and the telescopic end of the third electric telescopic rod (15) is connected with a circular plate (22) with a hollow inside through the machining table (1). The outer wall of the circular plate (22) is provided with a hose (23) for communicating with the output end of the externally pre-set spraying equipment.

2. A fastening device for use in the assembly of a PEM electrolyser cell according to claim 1, characterised in that, The outer wall of each of the plurality of placement seats (11) is provided with a circular ring (12), the inner wall of each of the plurality of circular rings (12) is provided with a plurality of spray holes (25), and the plurality of circular rings (12) are connected and fixed through the first connecting pipes (24) arranged therebetween.

3. A fastening device for use in the assembly of a PEM electrolyser according to claim 1, characterised in that, The top of each of the two fixed plates (2) is provided with a first sliding groove (7), and the first sliding groove (7) is provided with a first sliding block (10) inside.

4. A fastening device for use in the assembly of a PEM electrolyser cell according to claim 3, characterised in that, The top of each of the two fixed plates (2) is provided with a first sliding groove (7), and the first sliding groove (7) is provided with a first sliding block (10) inside.

5. A fastening device for use in the assembly of a PEM electrolyser cell according to claim 1, characterised in that, The top of each of the two fixed plates (2) is provided with a first sliding groove (7), and the first sliding groove (7) is provided with a first sliding block (10) inside. The output end of the first driving motor (16) is provided with a mounting block (17). The four sides of the mounting block (17) are provided with first electric telescopic rods (18), the telescopic ends of the four first electric telescopic rods (18) are provided with second driving motors (19), and the output ends of the four second driving motors (19) are provided with sleeves (6). The top of the machining table (1) is provided with four second sliding grooves (8), the inside of each of the four second sliding grooves (8) is provided with a second sliding block (26), and the top of each of the four second sliding blocks (26) is connected with the moving plate (9) close to it.

6. A fastening device for use in the assembly of a PEM electrolyser cell according to claim 1, characterised in that, The limiting mechanism comprises third sliding grooves (27) opened at the top of the four moving plates (9), third sliding blocks (28) are mounted in the four third sliding grooves (27), moving frames (30) are connected to the top ends of the four third sliding blocks (28) through the fourth electric telescopic rods (29) arranged, and two supporting plates (33) are mounted on one side outer wall of each of the four moving frames (30).

7. A fastening device for use in the assembly of a PEM electrolyser according to claim 6, characterised in that, The rotating plate (31) is hollow, rubber pads (37) and sponge pads (36) are mounted on two side outer walls of the rotating plate (31) respectively, a plurality of drainage holes (35) are formed in the side outer wall of the rotating plate (31) close to the sponge pad (36), and connecting ends (32) and a plurality of industrial cameras (34) are arranged on the other two side outer walls of the rotating plate (31).

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