Hydrogen production electrode frame fixed diaphragm structure and electrolytic cell

Abstract

The utility model discloses a kind of hydrogen production polar frame fixed diaphragm structure and electrolytic cell, by being provided with diaphragm fixed column on diaphragm body, reliable mechanical connection between diaphragm and polar frame is realized, the stability and structural strength of diaphragm installation are improved, displacement or damage caused by vibration or pressure change in the process of operation is prevented, diaphragm body center is provided with open hole, corresponding with the reaction chamber of electrolytic cell, ensure that reaction medium flows smoothly, improve electrolytic efficiency, integrate the diaphragm body after improvement in polar frame interior, realize highly integrated design, utilize the cooperation of diaphragm pressing strip and diaphragm fixed column, realize the quick, firm installation of diaphragm, without additional bonding or complex process, reduce assembly difficulty.

Description

Technical Field

[0001] This utility model relates to the field of electromechanical equipment, and in particular to a hydrogen production electrode frame fixing diaphragm structure and an electrolytic cell. Background Technology

[0002] In alkaline water electrolysis (AWE) hydrogen production equipment, the electrolyzer is the core component, typically composed of multiple stacked electrolysis chambers. The core components of each chamber include the anode, cathode, diaphragm, and a frame for separation and support. The diaphragm isolates the hydrogen produced at the cathode from the oxygen produced at the anode, while allowing ions to pass through in the electrolyte.

[0003] The spacing between the diaphragm and the electrode is one of the key parameters affecting the performance of the electrolyzer. A uniform and stable spacing ensures consistent ion transport paths, reduces ohmic losses, and thus improves electrolysis efficiency. Simultaneously, this spacing also forms a channel for gas-liquid transport, and its uniformity directly affects the smooth discharge of gas.

[0004] In existing technologies, the diaphragm is typically fixed by stacking flexible diaphragms, sealing gaskets, and electrode frames layer by layer, and then applying immense external pressure through end plates and tie rods at both ends of the electrolytic cell for overall compression and fixation. This method has significant drawbacks: during the compression process, the flexible diaphragm is prone to wrinkling or localized tensile deformation due to uneven stress, resulting in an uneven surface. This unevenness leads to uneven spacing between the diaphragm and electrodes; some areas being too close may pose a short-circuit risk, while others being too far apart can increase ohmic resistance and block gas-liquid channels, ultimately causing decreased electrolysis efficiency and operational instability. Furthermore, uneven stress can accelerate physical damage to the diaphragm, shortening its service life.

[0005] In summary, a hydrogen production electrode frame fixing diaphragm structure and an electrolyzer are needed to address the shortcomings of existing technologies. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a hydrogen production electrode frame fixing diaphragm structure and an electrolyzer, aiming to solve the aforementioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a hydrogen production electrode frame fixing diaphragm structure, comprising a diaphragm body, a diaphragm fixing column disposed on the diaphragm body, the diaphragm fixing column being fixedly connected to the diaphragm body, an opening corresponding to an opening chamber being disposed at the center of the diaphragm body, the diaphragm fixing column being disposed around the opening, an electrode frame docking ring disposed on the diaphragm body, the electrode frame docking ring being disposed outside the diaphragm fixing column, an inlet flow channel docking hole and an outlet flow channel docking hole being disposed on the electrode frame docking ring, the inlet flow channel docking hole and the outlet flow channel docking hole being disposed opposite to each other. By setting diaphragm fixing columns on the diaphragm body, a reliable mechanical connection between the diaphragm and the electrode frame is achieved, improving the stability and structural strength of the diaphragm installation and preventing displacement or damage caused by vibration or pressure changes during operation. An opening hole is set in the center of the diaphragm body, corresponding to the reaction chamber (open chamber) of the electrolytic cell, ensuring smooth flow of the reaction medium and improving electrolysis efficiency. The electrode frame docking ring and the inlet and outlet flow channel docking holes on the ring are set to achieve precise flow channel alignment and connection with other components, ensuring the continuity and sealing of the electrolyte or gas flow path, reducing internal leakage and pressure drop. The inlet and outlet flow channel docking holes are set opposite to each other, which is conducive to forming a reasonable fluid flow direction, enhancing mass transfer effect, and improving electrolysis performance.

[0008] Optionally, a pressure strip connection ring is provided on the outer side of the electrode frame connection ring, and the pressure strip connection ring is fixedly connected to the electrode frame connection ring. Adding a pressure strip connection ring on the outer side of the electrode frame connection ring and fixing it thereto further enhances the edge sealing and overall rigidity of the entire diaphragm structure. The pressure strip ring can be used with an external clamping mechanism to provide uniform clamping force during assembly, effectively preventing electrolyte leakage, improving the safety and long-term operational reliability of the electrolyzer, and the integrated structural design facilitates assembly and disassembly, and is beneficial for maintenance and replacement.

[0009] Optionally, the framed docking ring is provided with flow channel positioning holes, which are equidistantly arranged on the outer side of the framed docking ring. The equidistant arrangement of flow channel positioning holes on the framed docking ring provides a precise positioning reference for the entire electrolytic cell stacking assembly. This equidistant arrangement facilitates modular, mass production and assembly, improves the alignment accuracy between components during multi-layer electrolytic cell stacking, avoids flow channel misalignment, thereby ensuring system consistency and stability, reducing manual adjustment time, and improving production efficiency and product yield.

[0010] Optionally, the electrode frame docking ring is provided with open positioning holes, which are equidistantly arranged on the inner side of the electrode frame docking ring. The open positioning holes located on the inner side of the electrode frame docking ring are used to align the opening at the center of the diaphragm with the position of the electrolytic cell reaction chamber, ensuring precise alignment of the reaction area. The combination of inner positioning and outer flow channel positioning forms a dual positioning mechanism, significantly improving assembly accuracy, helping to maintain the consistency of the reaction zone, avoiding excessively high or low local current densities caused by misalignment, extending diaphragm life, and improving electrolysis efficiency.

[0011] A hydrogen production electrolyzer employs a hydrogen production electrode frame to fix a diaphragm. The electrolyzer includes an electrode frame, a diaphragm body disposed within the electrode frame, and a diaphragm pressure strip on the diaphragm body. The diaphragm pressure strip corresponds to a diaphragm fixing column, and the diaphragm body is fixedly connected to the electrode frame via the diaphragm pressure strip. The improved diaphragm body is integrated inside the electrode frame, achieving a highly integrated design. The cooperation between the diaphragm pressure strip and the diaphragm fixing column enables rapid and secure installation of the diaphragm without additional bonding or complex processes, reducing assembly difficulty. This connection method can withstand thermal cycling and pressure fluctuations during electrolysis, maintaining long-term sealing performance and improving the stability and safety of the electrolyzer operation. The overall structure is compact, facilitating miniaturization and high-density stacking designs, and is suitable for high-power hydrogen production systems.

[0012] Optionally, the diaphragm pressure strip is provided with pressure strip fixing screws, and the diaphragm pressure strip is connected to the diaphragm fixing column through the pressure strip fixing screws. By providing pressure strip fixing screws on the diaphragm pressure strip and connecting it to the diaphragm fixing column, a detachable fastening structure is achieved. The screw connection method facilitates the inspection and replacement of the diaphragm, significantly improving the maintainability of the equipment. It also allows for precise control of the preload, avoiding deformation or leakage caused by uneven compression, and further improving the sealing reliability.

[0013] The beneficial effects of this utility model are:

[0014] 1. In this utility model, by setting diaphragm fixing columns on the diaphragm body, a reliable mechanical connection between the diaphragm and the electrode frame is achieved, which improves the stability and structural strength of the diaphragm installation and prevents displacement or damage caused by vibration or pressure changes during operation. An opening hole is set in the center of the diaphragm body, which corresponds to the reaction chamber (open chamber) of the electrolytic cell to ensure smooth flow of the reaction medium and improve electrolysis efficiency. The electrode frame docking ring and the inlet flow channel docking hole and outlet flow channel docking hole on the ring are set to achieve precise flow channel alignment and connection with other components, ensuring the continuity and sealing of the electrolyte or gas flow path, reducing internal leakage and pressure drop. The inlet and outlet flow channel docking holes are set opposite to each other, which is conducive to forming a reasonable fluid flow direction, enhancing the mass transfer effect, and improving electrolysis performance.

[0015] 2. In this utility model, a pressure strip is added to the outside of the electrode frame docking ring and fixedly connected to it, which further enhances the edge sealing and overall rigidity of the entire diaphragm structure. The pressure strip can be used with an external clamping mechanism to provide uniform clamping force during assembly, effectively preventing electrolyte leakage, improving the safety and long-term operational reliability of the electrolytic cell, and the integrated structural design facilitates assembly and disassembly, which is beneficial for maintenance and replacement.

[0016] 3. In this utility model, the improved diaphragm body is integrated inside the electrode frame to achieve a highly integrated design. By utilizing the cooperation between the diaphragm pressure strip and the diaphragm fixing column, the diaphragm can be installed quickly and firmly without additional bonding or complex processes, reducing assembly difficulty. This connection method can withstand the thermal cycling and pressure fluctuations during electrolysis, maintain long-term sealing performance, and improve the stability and safety of the electrolyzer operation. The overall structure is compact, which is conducive to miniaturization and high-density stacking design, and is suitable for high-power hydrogen production systems. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a diaphragm structure according to the present invention.

[0018] Figure 2 This is a schematic diagram of an electrolytic cell structure according to the present invention.

[0019] In the diagram: 1. Diaphragm body; 2. Diaphragm fixing column; 3. Opening hole; 4. Pole frame docking ring; 5. Inlet flow channel docking hole; 6. Outlet flow channel docking hole; 7. Pressure strip docking ring; 8. Flow channel positioning hole; 9. Opening positioning hole; 10. Pole frame; 11. Diaphragm pressure strip; 12. Pressure strip fixing screw. Detailed Implementation

[0020] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Refer to the instruction manual. Figure 1 -Appendix Figure 2 This technical solution will be described.

[0022] like Figure 1As shown, a hydrogen production electrode frame fixed diaphragm structure includes a diaphragm body 1, a diaphragm fixing column 2 disposed on the diaphragm body 1, the diaphragm fixing column 2 being fixedly connected to the diaphragm body 1, an opening hole 3 corresponding to the opening chamber being disposed at the center of the diaphragm body 1, the diaphragm fixing column 2 being disposed around the opening hole 3, an electrode frame docking ring 4 disposed on the diaphragm body 1, the electrode frame docking ring 4 being disposed outside the diaphragm fixing column 2, an inlet flow channel docking hole 5 and an outlet flow channel docking hole 6 being disposed on the electrode frame docking ring 4, the inlet flow channel docking hole 5 and the outlet flow channel docking hole 6 being disposed opposite to each other.

[0023] A pressure strip docking ring 7 is provided on the outer side of the pole frame docking ring 4. The pressure strip docking ring 7 is fixedly connected to the pole frame docking ring 4. A flow channel positioning hole 8 is provided on the frame docking ring. The flow channel positioning hole 8 is equidistantly provided on the outer side of the pole frame docking ring 4. An open positioning hole 9 is provided on the pole frame docking ring 4. The open positioning hole 9 is equidistantly provided on the inner side of the pole frame docking ring 4.

[0024] By setting diaphragm fixing columns on the diaphragm body, a reliable mechanical connection between the diaphragm and the electrode frame is achieved, which improves the stability and structural strength of the diaphragm installation and prevents displacement or damage caused by vibration or pressure changes during operation. An opening hole is set in the center of the diaphragm body, which corresponds to the reaction chamber (open chamber) of the electrolytic cell to ensure smooth flow of the reaction medium and improve electrolysis efficiency. The electrode frame docking ring and the inlet flow channel docking hole and outlet flow channel docking hole on the ring are set to achieve precise flow channel alignment and connection with other components, ensuring the continuity and sealing of the electrolyte or gas flow path, reducing internal leakage and pressure drop. The inlet and outlet flow channel docking holes are set opposite to each other, which is conducive to forming a reasonable fluid flow direction, enhancing the mass transfer effect, and improving electrolysis performance.

[0025] A pressure strip is added to the outside of the electrode frame docking ring and fixedly connected to it, which further enhances the edge sealing and overall rigidity of the entire diaphragm structure. The pressure strip ring can be used with an external clamping mechanism to provide uniform clamping force during assembly, effectively preventing electrolyte leakage, improving the safety and long-term operational reliability of the electrolyzer. The integrated structural design facilitates assembly and disassembly, and is conducive to maintenance and replacement.

[0026] A hydrogen production electrolyzer employs a hydrogen production electrode frame to fix a diaphragm, including an electrode frame 10, a diaphragm body 1 disposed within the electrode frame 10, a diaphragm pressure strip 11 disposed on the diaphragm body 1, the diaphragm pressure strip 11 corresponding to a diaphragm fixing column 2, the diaphragm body 1 being fixedly connected to the electrode frame via the diaphragm pressure strip 11, and a pressure strip fixing screw 12 disposed on the diaphragm pressure strip 11, the diaphragm pressure strip 11 being connected to the diaphragm fixing column 2 via the pressure strip fixing screw 12.

[0027] This invention integrates the improved diaphragm body inside the electrode frame, achieving a highly integrated design. By utilizing the cooperation between the diaphragm pressure strip and the diaphragm fixing column, the diaphragm can be installed quickly and firmly without additional bonding or complex processes, reducing assembly difficulty. This connection method can withstand the thermal cycling and pressure fluctuations during electrolysis, maintain long-term sealing performance, and improve the stability and safety of the electrolyzer operation. The overall structure is compact, which is conducive to miniaturization and high-density stacking design, and is suitable for high-power hydrogen production systems.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydrogen production electrode frame fixed diaphragm structure, characterized in that, The device includes a diaphragm body, on which a diaphragm fixing column is provided, the diaphragm fixing column being fixedly connected to the diaphragm body, an opening corresponding to the opening chamber being provided at the center of the diaphragm body, the diaphragm fixing column being provided around the opening, and a pole frame docking ring being provided on the diaphragm body, the pole frame docking ring being provided outside the diaphragm fixing column, the pole frame docking ring being provided with an inlet flow channel docking hole and an outlet flow channel docking hole, the inlet flow channel docking hole and the outlet flow channel docking hole being arranged opposite to each other.

2. The hydrogen production electrode frame fixed diaphragm structure according to claim 1, characterized in that, A pressure strip is provided on the outside of the pole frame docking ring, and the pressure strip docking ring is fixedly connected to the pole frame docking ring.

3. The hydrogen production electrode frame fixed diaphragm structure according to claim 1, characterized in that, The polar frame docking ring is provided with flow channel positioning holes, which are equidistantly arranged on the outer side of the polar frame docking ring.

4. The hydrogen production electrode frame fixed diaphragm structure according to claim 1, characterized in that, The pole frame docking ring is provided with an open positioning hole, which is equidistantly arranged on the inner side of the pole frame docking ring.

5. A hydrogen electrolyzer, employing the hydrogen production electrode frame fixed diaphragm structure as described in any one of claims 1-4, characterized in that, The device includes an electrode frame, within which a diaphragm body is disposed. A diaphragm pressure strip is disposed on the diaphragm body, and the diaphragm pressure strip corresponds to a diaphragm fixing column. The diaphragm body is fixedly connected to the electrode frame through the diaphragm pressure strip.

6. The hydrogen production electrolyzer according to claim 5, characterized in that, The diaphragm pressure strip is provided with pressure strip fixing screws, and the diaphragm pressure strip is connected to the diaphragm fixing column through the pressure strip fixing screws.

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