Flatness adjusting tool for bipolar plate frame of alkaline electrolytic cell

Abstract

The utility model discloses an alkaline electrolytic cell bipolar plate frame flatness adjusting tool which comprises a correction platform, an aluminum plate is placed on the correction platform, a to-be-leveled electrode frame is placed on the aluminum plate, a correction rod is arranged on the correction platform, and the correction rod is located over the aluminum plate. One end of the correcting rod is mounted on the screw rod through a connecting plate, the bottom of the other end of the correcting rod is connected with a hydraulic cylinder, and the hydraulic cylinder is fixed on the correcting platform; a flat steel crow bar is arranged below the position, close to the screw, of the correcting rod, and the bottom of the flat steel crow bar is connected with a copper plate; according to the utility model, the lever principle and the pressure method are adopted, the excessive deformation of the pole frame is leveled, the overall structure is simple, the manufacture is convenient, and the leveling efficiency can be improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of electrode plate adjustment tooling, specifically relating to a tooling for adjusting the flatness of the bipolar plate frame of an alkaline electrolytic cell. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] An alkaline electrolyzer is a new energy equipment for producing hydrogen through water electrolysis. The bipolar plate is the most important component of the alkaline electrolyzer. Together with electrodes, gaskets, and a diaphragm, the bipolar plate forms the electrolyzer chamber. Located on both sides of the nickel mesh within the chamber, the bipolar plate conducts electrons, resulting in a more uniform electrolytic current density on the plate. It also reduces the contact resistance between the plate and the nickel mesh, increasing the current density and reducing hydrogen production energy consumption. The plates, situated at both ends of the electrolysis chamber structure, form chambers for the flow of alkaline solutions in the cathode and anolyte regions, achieving separation of the cathode and anolyte solutions. This reduces the O2 content in H2 and the H2 content in O2 to some extent, ensuring the safety of the electrolyzer operation. The hydrogen and oxygen gas channels at the top of the bipolar plate and the alkaline solution inlet at the bottom form flow channels within the electrolyzer through the stacking of numerous plates. The bipolar plate is the most important repetitive component of the alkaline water electrolysis hydrogen production electrolyzer, measuring 1000 Nm. 3 An electrolytic cell with a capacity of / h typically requires around 300 bipolar plates.

[0004] The bipolar plate of an electrolytic cell consists of an outer frame and an inner main plate. The frame is made by rolling, welding, heat-treating, and machining sheet metal, resulting in a thin ring structure. Some deformation occurs during machining, and the flatness of the frame after machining must be controlled within 0.5mm. The main plate is made by laser-cutting sheet metal, resulting in a thin circular sheet structure. Some deformation occurs during laser cutting and handling, and the flatness of the main plate after cutting must also be controlled within 0.5mm. After the frame and plates are fabricated separately, they are laser-welded together to form a bipolar plate assembly. The industry standard is to control the deformation of the bipolar plate assembly to within 1mm. Due to the deformation of the frame and plates during their individual processing, as well as the thermal expansion and contraction during welding, cumulative deformation occurs, resulting in overall deformation. Excessive deformation can affect the overall assembly, performance, and service life of the electrolytic cell.

[0005] In the prior art, Chinese utility model patent CN221184239U discloses an electrolytic cell electrode plate leveling device, which achieves electrode plate leveling by rotating an upper leveling roller and a lower leveling roller. However, this structure has the following problems: First, it cannot achieve calibration of annular electrode frames, as the upper and lower leveling rollers are calibrated during the conveying process. For annular electrode frames, the stability of the conveying process cannot be guaranteed. Second, it cannot achieve calibration of electrode plates of different thicknesses, thus limiting its applicability. Third, the pressure of the upper and lower leveling rollers cannot be controlled during the calibration process, making it impossible to guarantee the leveling quality. Utility Model Content

[0006] The purpose of this invention is to provide a tooling for adjusting the flatness of the bipolar plate frame in an alkaline electrolytic cell. It uses the lever principle and pressure method to level the frame when it is deformed beyond the standard. The overall structure is simple and easy to manufacture, and it can improve the leveling efficiency.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0008] In a first aspect, embodiments of this utility model provide a tooling for adjusting the flatness of bipolar plate frames in an alkaline electrolytic cell. The tooling includes a calibration platform on which an aluminum plate is placed, and an electrode frame to be leveled is placed on the aluminum plate. A calibration rod is positioned on the calibration platform directly above the aluminum plate. One end of the calibration rod is mounted on a screw via a connecting plate, and the bottom of the other end of the calibration rod is connected to a hydraulic cylinder, which is fixed to the calibration platform. A flat steel pry bar is positioned below the calibration rod near the screw, and the bottom of the flat steel pry bar is connected to a copper plate.

[0009] As a further technical solution, the correction rod is arranged parallel to the upper surface of the correction platform and separated by a set distance.

[0010] As a further technical solution, the screw is vertically fixed on the calibration platform, and the screw includes a first screw and a second screw, which are arranged in parallel.

[0011] As a further technical solution, the connecting plate is provided with a first circular hole and a second circular hole, which are respectively used for the first screw and the second screw to pass through.

[0012] As a further technical solution, the connecting plate is fixed to the corresponding positions of the first screw and the second screw by the upper nut and the lower nut.

[0013] As a further technical solution, the correction rod is fixedly connected to the connecting plate, or the correction rod and the connecting plate adopt an integral structure.

[0014] As a further technical solution, the piston rod end of the hydraulic cylinder is fixedly connected to the bottom of the correction rod end.

[0015] As a further technical solution, the width of the copper plate is greater than the width of the pole frame.

[0016] As a further technical solution, the calibration platform is provided with multiple positioning pins, which are evenly distributed in the circumferential direction of the pole frame.

[0017] As a further technical solution, the bottom of the calibration platform is provided with multiple support legs, and the bottom of the support legs is equipped with anti-slip pads.

[0018] The beneficial effects of the above-described embodiments of this utility model are as follows:

[0019] The alkaline electrolytic cell bipolar plate frame flatness adjustment fixture provided by this utility model can position the annular frame through positioning pins during the leveling process to prevent the frame from shifting. The fixture can be designed according to the frame size and deformation amount. It uses the lever principle and pressure method to level the frame when it exceeds the standard deformation. The overall structure is simple and easy to manufacture, which can improve the leveling efficiency.

[0020] The pole frame is made of Q235B and DC04, which are low-carbon steels. To prevent the flat steel pry bar from directly contacting the bipolar plate and causing damage, this invention uses long aluminum blocks as padding between the bipolar plate and the platform, and copper plates as padding between the bipolar plate and the flat steel pry bar. Because aluminum and copper are both lower in hardness than carbon steel, the bipolar plate will not be damaged during the pressure leveling process; thus achieving the leveling effect while preventing product damage.

[0021] The alkaline electrolytic cell bipolar plate electrode frame flatness adjustment fixture provided by this utility model can adapt to different deformation amounts and electrode frame thicknesses by adjusting the vertical position of the connecting plate, making it widely adaptable and highly versatile. In addition, the pressing process is achieved by hydraulic cylinder drive, and the pressing pressure can be set as needed to ensure that the pressing pressure of the same electrode frame is the same, which can improve the leveling quality of the electrode frame, increase the first pass rate of electrode frame flatness by 30%, and increase efficiency by 60%. Attached Figure Description

[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0023] Figure 1 This is a perspective view of the bipolar plate frame flatness adjustment fixture for the alkaline electrolytic cell of this utility model.

[0024] Figure 2This is a front view of the alkaline electrolytic cell bipolar plate frame flatness adjustment fixture of this utility model;

[0025] Figure 3 This is a side view of the alkaline electrolytic cell bipolar plate frame flatness adjustment fixture of this utility model;

[0026] Figure 4 This is a top view of the tooling for adjusting the flatness of the bipolar plate frame of the alkaline electrolytic cell according to this utility model.

[0027] The diagram is for illustrative purposes only.

[0028] The components include: 1. Calibration platform; 2. Aluminum plate; 3. Hydraulic cylinder; 4. Calibration rod; 5. Pole frame; 6. Positioning pin; 7. First screw; 8. Upper nut; 9. Second screw; 10. Connecting plate; 11. Support leg; 12. Anti-slip pad; 13. Lower nut; 14. Flat steel pry bar; and 15. Copper plate. Detailed Implementation

[0029] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0030] Example 1

[0031] In a typical embodiment of this utility model, such as Figures 1-4 As shown, a tooling for adjusting the flatness of bipolar plate frames in an alkaline electrolyzer is provided, including a calibration platform 1, an aluminum plate 2 placed on the calibration platform 1, an electrode frame 5 to be leveled placed on the aluminum plate 2, a calibration rod 4 set on the calibration platform 1, the calibration rod 4 being located directly above the aluminum plate 2; one end of the calibration rod 4 is mounted on a screw via a connecting plate 10, and the bottom of the other end of the calibration rod 4 is connected to a hydraulic cylinder 3, the hydraulic cylinder 3 being fixed on the calibration platform 1; a flat steel pry bar 14 is set below the calibration rod 4 near the screw, and the bottom of the flat steel pry bar 14 is connected to a copper plate 15.

[0032] In this embodiment, the correction rod 4 is arranged parallel to the upper surface of the correction platform 1 and separated by a set distance. In use, the pole frame 5 to be leveled is placed on the aluminum plate 2. The downward movement of the piston rod of the hydraulic cylinder 3 drives the correction rod to move down, thereby driving the flat steel pry bar 14 and the aluminum plate 2 at its bottom to move down, so that the aluminum plate is pressed tightly against the deformed position of the pole frame 5, thereby achieving the leveling of the pole frame.

[0033] In this embodiment, the screw is vertically fixed on the calibration platform 1. The screw includes a first screw 7 and a second screw 9, which are arranged in parallel. Further, the connecting plate 10 has a first circular hole and a second circular hole, which are respectively used for the first screw 7 and the second screw 9 to pass through. The connecting plate 10 is fixed to the corresponding positions of the first screw 7 and the second screw 9 by an upper nut 8 and a lower nut 13. Before use, the position of the connecting rod is adjusted according to the thickness of the pole frame and the deformation of the pole plate.

[0034] In this embodiment, the correction rod 4 is fixedly connected to the connecting plate 10, or the correction rod 4 and the connecting plate 10 are integrally formed. By fixing one end of the correction rod 4 to the connecting plate 10, the electrode plate can be leveled by pressing down on the correction rod 4.

[0035] In this embodiment, the piston rod end of the hydraulic cylinder 3 is fixedly connected to the bottom of the correction rod end 4, so as to realize that the piston rod moves in the hydraulic cylinder to drive the correction rod to press down. At the same time, the pressing pressure can be set as needed. The hydraulic cylinder adopts an existing structure, and the use of the hydraulic cylinder is common knowledge for those skilled in the art.

[0036] In this embodiment, the width of the copper plate 15 is greater than the width of the pole frame 5, so as to ensure that the copper plate can cover the entire width of the pole frame.

[0037] In this embodiment, the calibration platform 1 is provided with a plurality of positioning pins 6, which are evenly distributed in the circumferential direction of the pole frame 5. The positioning pins 6 are used to position the pole frame and prevent the pole frame from deflecting.

[0038] In this embodiment, the bottom of the calibration platform 1 is provided with a plurality of support legs 11, and the bottom of the support legs 11 is equipped with anti-slip pads 12.

[0039] The method for using the alkaline electrolytic cell bipolar plate frame flatness adjustment fixture provided in this embodiment is as follows:

[0040] (1) Preparation: Using the marble platform feeler gauge method, place the pole frame on the marble platform, use a 1.0mm feeler gauge to check the pole frame in a 360° range, and use a marker to mark the areas that exceed the standard;

[0041] (2) Leveling fixture: Adjust the upper and lower nuts to position the connecting plate in the appropriate position;

[0042] (3) Leveling: Align the area marked with excessive deformation with the copper plate on the correction rod. Move the piston rod of the hydraulic cylinder downward to drive the flat steel pry bar to press down on the area marked with excessive deformation. Move the flat steel pry bar down to the marked position and stop moving down. Hold the pressure for 15 seconds.

[0043] (4) Disassembly: After the pressure holding is completed, remove the pole frame;

[0044] (5) Inspection: The bipolar plate is inspected again using the platform feeler gauge method. The flatness is usually adjusted to within 1mm, which meets the standard and the assembly requirements of the electrolytic cell.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An alkaline electrolyzer bipolar plate gasket flatness adjustment tool, characterized by, The correction platform is provided with an aluminum plate, and the pole frame to be corrected is placed on the aluminum plate; a correction rod is arranged on the correction platform and located directly above the aluminum plate; one end of the correction rod is installed on a screw rod through a connecting plate, and the other end of the correction rod is connected with a hydraulic cylinder at the bottom, the hydraulic cylinder is fixed on the correction platform; a flat steel lever is arranged below the position of the correction rod close to the screw rod, and the bottom of the flat steel lever is connected with a copper plate.

2. The alkaline electrolyzer bipolar plate gasket flatness adjustment tool of claim 1, wherein, The correction rod is parallel to the upper surface of the correction platform and is separated by a certain distance.

3. The alkaline electrolyzer bipolar plate gasket flatness adjustment tool of claim 1, wherein, The screw rod is vertically fixed on the correction platform, and the screw rod comprises a first screw rod and a second screw rod, and the first screw rod and the second screw rod are arranged in parallel.

4. The alkaline electrolyzer bipolar plate gasket flatness adjustment tool of claim 3, wherein, The connecting plate is provided with a first circular hole and a second circular hole, and the first circular hole and the second circular hole are respectively used for penetrating the first screw rod and the second screw rod.

5. The alkaline electrolyzer bipolar plate gasket flatness adjustment tool of claim 3, wherein, The connecting plate is fixed on the corresponding positions of the first screw rod and the second screw rod through upper and lower nuts.

6. The alkaline electrolyzer bipolar plate gasket flatness adjustment tool of claim 1, wherein, The correction rod is fixedly connected with the connecting plate, or the correction rod and the connecting plate adopt an integrated structure.

7. The alkaline electrolyzer bipolar plate gasket flatness adjustment tool of claim 1, wherein, The end of the piston rod of the hydraulic cylinder is fixedly connected with the bottom of the end of the correction rod.

8. The alkaline electrolyzer bipolar plate gasket flatness adjustment tool of claim 1, wherein, The width of the copper plate is greater than the width of the pole frame.

9. The alkaline electrolyzer bipolar plate gasket flatness adjustment tool of claim 1, wherein, A plurality of positioning pins are arranged on the correction platform and are uniformly distributed in the circumferential direction of the pole frame.

10. The alkaline electrolyzer bipolar plate gasket flatness adjustment tool of claim 1, wherein, A plurality of supporting legs are arranged at the bottom of the correction platform, and anti-skid pads are arranged at the bottom of the supporting legs.

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