An electrolytic cell sealing structure and an electrolytic cell

Abstract

This invention discloses a sealing structure for an electrolytic cell and an electrolytic cell. The sealing structure includes a pressure plate, electrodes, a diaphragm, and a gasket. The pressure plate includes a first step, a second step, and a third step, which respectively match the contact portions of the electrodes, the diaphragm, and the gasket. The sealing structure provided by this invention allows the pressure plate to completely fit against the contact portions of the electrodes, the diaphragm, and the gasket without gaps, reducing the risk of cross-contamination of media between the two sides of the electrolytic cell chamber.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic hydrogen production technology, specifically to a sealing structure for an electrolytic cell and an electrolytic cell. Background Technology

[0002] Hydrogen is an extremely clean and efficient renewable energy source. Under the overarching goal of reducing carbon emissions and achieving carbon neutrality, water electrolysis hydrogen production technology has been widely demonstrated and applied in various fields. The electrolyzer is the core equipment in water electrolysis hydrogen production, with wide applications and a significant impact on the performance, lifespan, and cost of the system. In the electrolyzer's sealing structure, the support and fit between the pressure plate and internal components have a crucial influence on the electrolyzer's sealing performance. For example... Figure 1 As shown, most existing electrolytic cell electrode plates are made of flat plates of the same thickness. When installed with the electrodes, diaphragms, and gaskets in the electrolytic cell, gaps may exist, posing a risk of incomplete sealing. Therefore, improvements are needed. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention proposes a sealing structure for an electrolytic cell, in which the pressure plate can be completely fitted with the electrode, diaphragm, and gasket without any gaps, thereby reducing the risk of cross-contamination between the media on both sides of the electrolytic cell chamber.

[0004] The technical solution of this utility model is implemented as follows:

[0005] An electrolytic cell sealing structure includes a pressure plate, an electrode, a diaphragm, and a gasket. The pressure plate includes a first step, a second step, and a third step, which respectively match the contact portions of the electrode, the diaphragm, and the gasket.

[0006] Preferably, the tablet is one of an integral tablet, a horizontally split tablet, or a vertically split tablet.

[0007] Preferably, the integral tablet is formed into three steps by molding or machining.

[0008] Preferably, the horizontally split tablet includes an integral horizontal split forming a two-level step by molding or machining, and a first horizontal split that is stacked sequentially with the integral horizontal split in the vertical direction and fixed together with the integral horizontal split to form a three-level step.

[0009] Preferably, the horizontally split tablet includes a first horizontal split, a second horizontal split, and a third horizontal split that are stacked and fixed in the vertical direction to form three levels of steps.

[0010] Preferably, the vertical split pressing sheet includes an integral vertical split forming a two-level step by molding or machining, and a separate vertical split arranged in sequence with the integral vertical split in the horizontal direction and fixed together with the integral vertical split to form a three-level step, and the integral horizontal split is set on the first horizontal split.

[0011] Preferably, the vertical split pressing sheet includes a first vertical split, a second vertical split, and a third vertical split arranged sequentially in the horizontal direction and fixed to form three steps.

[0012] Preferably, the pressing sheet is made of one of the following materials: nickel plate, nickel-plated carbon steel, or stainless steel.

[0013] This utility model also provides an electrolytic cell, including the above-mentioned electrolytic cell sealing structure.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] This invention proposes a sealing structure for an electrolytic cell, including a pressure plate, an electrode, a diaphragm, and a gasket. By setting a first-level step, a second-level step, and a third-level step in the pressure plate, which respectively match the contact parts of the electrode, the diaphragm, and the gasket, the pressure plate can completely fit with the contact parts of the electrode, the diaphragm, and the gasket without gaps, thus reducing the risk of cross-contamination of media on both sides of the electrolytic cell chamber. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the installation of the pressure plate and electrode, diaphragm and gasket in the prior art;

[0018] Figure 2 This is a schematic diagram of the installation of the pressure plate, electrode, diaphragm, and gasket in Embodiment 1 of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the compression tablet in Embodiment 1 of this utility model;

[0020] Figure 4 This is a schematic diagram of the horizontally split tablet structure in Example 2;

[0021] Figure 5 This is a schematic diagram of the horizontally split tablet structure in Example 3;

[0022] Figure 6 This is a schematic diagram of the vertically split tablet structure in Example 4;

[0023] Figure 7 This is a schematic diagram of the vertical split-type tablet structure in Example 5.

[0024] Attached diagram labels: 100, pressing plate; 101, first step; 1011, first platform; 102, second step; 1021, second platform; 103, third step; 1031, third platform; 104, second elevation; 105, first elevation; 111, overall horizontal segment; 112, first horizontal segment; 113, second horizontal segment; 114, third horizontal segment; 115, fourth horizontal segment; 121, overall vertical segment; 122, first vertical segment; 123, second vertical segment; 124, third vertical segment; 125, fourth vertical segment;

[0025] 200. Electrode;

[0026] 300. Diaphragm;

[0027] 400. Gasket;

[0028] 500, flat plate pressing;

[0029] 600, gap. Detailed Implementation

[0030] 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.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Example 1

[0034] See Figure 2 and Figure 3 This embodiment provides an electrolytic cell sealing structure, including a pressure plate 100, an electrode 200, a diaphragm 300, and a gasket 400. The pressure plate 100 includes a first step 101, a second step 102, and a third step 103 arranged sequentially from bottom to top. The first step 101, the second step 102, and the third step 103 respectively match the contact portions of the electrode 200, the diaphragm 300, and the gasket 400, so that the first step 101, the second step 102, and the third step 103 are completely in contact with the contact portions of the electrode 200, the diaphragm 300, and the gasket 400. Specifically, the gasket 400 is disposed on the third platform 1031 of the third step 103, and the abutting part of the gasket 400 is in contact with the third platform 1031. The second platform 1021 of the second step 102 and the second vertical surface 104 between the second step 102 and the third step 103 are respectively in contact with the abutting part of the diaphragm 300. The first platform 1011 of the first step 101 and the first vertical surface 105 between the second step 102 and the first step 101 are in contact with the abutting part of the electrode 200.

[0035] It should be noted that "fitting" here refers to the fact that the shape, height, and size of the two surfaces that come into contact with each other are matched and adapted.

[0036] The electrolytic cell sealing structure provided in this embodiment uses a first-level step 101, a second-level step 102, and a third-level step 103 in the pressure plate 100 to match the contact portions of the electrode 200, the diaphragm 300, and the gasket 400, respectively. This ensures complete fit between the pressure plate 100 and the contact portions of the electrode 200, the diaphragm 300, and the gasket 400, eliminating gaps and reducing the risk of cross-contamination of media on both sides of the electrolytic cell chamber. Furthermore, the steps provide a clear positioning reference during pressure plate assembly or use, ensuring installation accuracy between components and reducing assembly errors caused by misalignment.

[0037] Furthermore, in this embodiment, the tablet is an integral tablet, wherein the integral tablet is formed into three steps by integral molding through a mold.

[0038] In this embodiment, the integral tablet is formed by mold in one piece, without any splicing or assembly gaps, resulting in a more stable structure. Furthermore, the one-piece mold design allows for customization based on the shape of the tablet and steps, maximizing the use of raw materials and minimizing waste. Compared to processing and then assembling separately, this effectively reduces material costs.

[0039] Furthermore, the press 1 can be made of one of the following materials: nickel, nickel-plated carbon steel, or stainless steel. In this embodiment, the press 1 is made of stainless steel.

[0040] Example 2

[0041] See Figure 4 Unlike Embodiment 1, this embodiment uses a horizontally split-type pressing sheet. The horizontally split-type pressing sheet includes an integral horizontal split 111 formed by machining to create a two-level step, and a first horizontal split 112 that is stacked vertically with the integral horizontal split 111 and fixed together to form a three-level step. The integral horizontal split 111 and the first horizontal split 112 are fixedly connected by spot welding or bonding, etc., which is not limited here. It should be noted that the integral horizontal split 111 can be placed above or below the first horizontal split 112, as long as a three-level step is formed. Of course, the lengths of the integral horizontal split 111 and the first horizontal split 112 need to be adjusted according to the requirements of different placement methods. Specifically, in this embodiment, the integral horizontal split 111 is placed above the first horizontal split 112.

[0042] In this embodiment, the overall horizontal split 111 is integrally formed by machining, which avoids the gaps or tolerance accumulation problems that may occur when traditional split processing and splicing are carried out. This ensures the dimensional accuracy and surface finish of the secondary step, reduces stress concentration points, and the overall horizontal split 111 and the first horizontal split 112 can be processed as independent modules, which facilitates the division of labor and parallel operation on the production line and improves production flexibility.

[0043] Example 3

[0044] See Figure 5 Unlike Embodiment 1, this embodiment features a horizontally split pressing sheet, which includes a second horizontal split sheet 113, a third horizontal split sheet 114, and a fourth horizontal split sheet 115 stacked vertically from bottom to top to form three steps. The second horizontal split sheet 113, the third horizontal split sheet 114, and the fourth horizontal split sheet 115 are fixedly connected together by spot welding.

[0045] In this embodiment, the split structure breaks down the complex overall machining into the machining of multiple simple components (e.g., one component for each step), reducing the amount of machining and dependence on large machining equipment. Small machine tools can complete the machining of a single component, improving production feasibility. The surface treatment of each component (e.g., plating, heat treatment) can be performed independently, avoiding the increased process difficulty caused by the large size of the overall component (e.g., furnace temperature uniformity, coating thickness consistency, etc.).

[0046] Example 4

[0047] See Figure 6 Unlike Embodiment 1, this embodiment uses a vertically split pressing sheet. The vertically split pressing sheet includes an integral vertical split sheet 121 formed by a mold to create a two-level step, and a first vertical split sheet 122 arranged horizontally with the integral vertical split sheet 121 and fixed together with the integral vertical split sheet 122 to form a three-level step. The integral vertical split sheet 121 and the first vertical split sheet 122 are connected together by adhesive. It should be noted that the first vertical split sheet 122 can be located to the left or right of the integral vertical split sheet 121, as long as a three-level step is formed. Of course, the height of the integral vertical split sheet 121 and the first vertical split sheet 122 needs to be adjusted according to the requirements. Specifically, in this embodiment, the first vertical split sheet 122 is located to the left of the integral vertical split sheet 121.

[0048] In this embodiment, the overall vertical split 121 is integrally formed using a mold to ensure precision. The first vertical split 122, which is horizontally arranged with the overall vertical split 121, can be mass-produced using standardized molds, reducing the cost of repetitive processing. For complex three-level stepped contours, there is no need for overall milling or carving; it can be achieved through split assembly, reducing the usage time of large machine tools and improving processing efficiency.

[0049] Example 5

[0050] See Figure 7 Unlike Embodiment 1, this embodiment uses a vertical split pressing sheet, which includes a second vertical split sheet 123, a third vertical split sheet 124, and a fourth vertical split sheet 125 arranged sequentially from left to right in the horizontal direction and forming a three-level step after fixing. The second vertical split sheet 123, the third vertical split sheet 124, and the fourth vertical split sheet 125 are fixedly connected together by adhesive.

[0051] In this embodiment, each vertical segment of the vertically split tablet can be processed independently using small precision machine tools, reducing reliance on large processing equipment. For complex three-step contours, no overall cutting is required; the process can be achieved through segment assembly, reducing material removal rate by more than 30% and decreasing processing time and energy consumption.

[0052] Example 6

[0053] This embodiment provides an electrolytic cell, including the electrolytic cell sealing structure in Embodiment 1. The electrolytic cell using this sealing structure has better sealing performance, higher reliability, higher efficiency, and longer service life.

[0054] It should be noted that the electrolytic cell may also include the electrolytic cell sealing structure in any of the embodiments 2-5. Electrolytic cells using these electrolytic cell sealing structures have the advantages of better sealing, higher reliability, higher efficiency, and longer service life.

[0055] 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, improvements, etc., 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 sealing structure for an electrolytic cell, characterized in that, The device includes a pressure plate (100), an electrode (200), a diaphragm (300), and a gasket (400). The pressure plate (100) includes a first step (101), a second step (102), and a third step (103), which respectively match the contact portions of the electrode (200), the diaphragm (300), and the gasket (400).

2. The electrolytic cell sealing structure according to claim 1, characterized in that, The tablet (100) is one of the following: integral tablet, horizontal split tablet, or vertical split tablet.

3. The electrolytic cell sealing structure according to claim 2, characterized in that, The integral tablet is formed into three steps through molding or machining.

4. The electrolytic cell sealing structure according to claim 2, characterized in that, The horizontally split tablet includes an integral horizontal split (111) formed by molding or machining to form a two-level step, and a first horizontal split (112) that is stacked in the vertical direction with the integral horizontal split (111) and fixed together with the integral horizontal split (111) to form a three-level step.

5. The electrolytic cell sealing structure according to claim 2, characterized in that, The horizontally split type of tablet includes a second horizontal split (113), a third horizontal split (114), and a fourth horizontal split (115) that are stacked and fixed in the vertical direction to form a three-level step.

6. The electrolytic cell sealing structure according to claim 2, characterized in that, The vertical split sheet includes an integral vertical split (121) formed by molding or machining to form a two-level step, and a first vertical split (122) arranged in sequence with the integral vertical split (121) in the horizontal direction and fixed together with the integral vertical split (121) to form a three-level step.

7. The electrolytic cell sealing structure according to claim 2, characterized in that, The vertical split pressing sheet includes a second vertical split (123), a third vertical split (124), and a fourth vertical split (125) arranged sequentially in the horizontal direction and fixed to form a three-level step.

8. The electrolytic cell sealing structure according to claim 2, characterized in that, The press (100) is made of one of the following materials: nickel plate, nickel-plated carbon steel, or stainless steel.

9. An electrolytic cell, characterized in that, Includes the electrolytic cell sealing structure as described in any one of claims 1-8.

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