Split type electrolytic cell end pole plate

Abstract

The utility model discloses a split type electrolytic cell end pole plate, including end pole frame, main pole plate, seal plate, support frame, wherein, end pole frame, main pole plate connection forms first subassembly, seal plate, support frame connection forms second subassembly, when main pole plate, seal plate respectively with the positive and negative two sides sealed lamination of end pole frame forms the chamber of hollow, and support frame is located in the chamber. The utility model has the advantages of light weight, plating quality is good, low in cost and so on, and can effectively avoid the problem such as plating uneven, lack of plating, plating leakage, insufficient support caused by the too flatization of end pole plate internal cavity.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic cell technology, and in particular to a split-type electrolytic cell end plate. Background Technology

[0002] Hydrogen energy is a crucial component of my country's future energy system and a vital vehicle for achieving green and low-carbon transformation of energy consumption. It has become a key emerging and future industry development direction in my country. Producing green hydrogen through water electrolysis using renewable green electricity from wind and solar power is a significant direction for future hydrogen energy development. The core equipment for green hydrogen production is the electrolyzer, which uses electricity to electrolyze water and produce hydrogen. Large-scale green hydrogen production primarily utilizes alkaline electrolyzers. Domestic companies have already achieved a single alkaline electrolyzer production capacity of 5000 Nm³ / h, greatly promoting the development of my country's green hydrogen energy industry.

[0003] In addition to serving as part of the electrolysis chamber, the end plates of alkaline electrolyzers also need to take into account the transmission, conduction, and diversion of alkaline solutions. Therefore, the thickness of the end plates of alkaline electrolyzers is generally several to more than ten times that of ordinary end plates. Considering that the end plates of electrolyzers are basically solid metal plates to support the internal structure of the chamber, the increasingly larger electrolyzers lead to an increase in the volume and weight of the end plates, resulting in higher material and processing costs.

[0004] To address the aforementioned issues, existing technologies employ hollow electrolytic cell end plates. For example, Chinese Utility Model Application No. CN202322820816.6 discloses an alkaline electrolytic cell end plate, comprising an electrode frame with an upper flat electrode plate and a lower flat electrode plate installed within it, forming an internal cavity between the upper and lower flat electrode plates. However, to prevent corrosion during electrolytic cell use, the electrode plates require nickel plating. Since the aforementioned alkaline electrolytic cell end plates are integral structures, plating can easily lead to uneven plating, incomplete plating, and missed plating within the internal cavity, severely impacting the electrolytic cell's lifespan. Furthermore, the lack of support between the upper and lower flat electrode plates can cause the internal cavity to become excessively flat, further increasing the likelihood of uneven plating, incomplete plating, and missed plating within the internal cavity.

[0005] How to solve the above problems has become an urgent technical issue. Utility Model Content

[0006] The purpose of this invention is to provide a split electrolytic cell end plate that is lightweight, has a good coating quality, and can effectively avoid the internal cavity of the end plate being too flat.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This utility model provides a split-type electrolytic cell end plate, including an end plate frame, a main plate, a sealing plate, and a support frame. The end plate frame and the main plate are connected to form a first component, and the sealing plate and the support frame are connected to form a second component. When the main plate and the sealing plate are sealed and fitted to the front and back sides of the end plate frame respectively, a hollow cavity is formed, and the support frame is located inside the cavity.

[0009] Furthermore, the support frame includes a support component, one side of which is connected to a sealing plate and the other side of which is connected to a support plate, the support plate being in contact with the main electrode plate.

[0010] Furthermore, the support assembly includes multiple crisscrossing support ribs, each support rib having several notches, and each notch is spaced apart along the length of the support rib, with a load-bearing support position formed between two adjacent notches.

[0011] Furthermore, at least one through hole is provided on the bearing support position, and a welding position is provided at the bottom of the notch.

[0012] Furthermore, the side of the end electrode frame that mates with the main electrode plate is provided with a first alkali channel hole, a second alkali channel hole, a gas flow channel, and an outlet. In addition, the end electrode frame is provided with an alkali manifold hole and an alkali branching port on the inner wall of the chamber, wherein the alkali manifold hole is connected to the first alkali channel hole, and the alkali branching port is connected to the second alkali channel hole.

[0013] Furthermore, some or all of the second alkali channel holes are provided with several alkali flow channels.

[0014] Furthermore, the terminal frame is provided with a mounting surface, the outer diameter of which is smaller than the outer diameter of the terminal frame and the inner diameter of which is smaller than the outer diameter of the main electrode plate, and the edge of the main electrode plate is sealed to the mounting surface.

[0015] Furthermore, a sealing gasket is provided between the terminal frame and the sealing plate.

[0016] Furthermore, at least one positioning hole is provided on the end pole frame, and the positioning hole penetrates both sides of the end pole frame.

[0017] Furthermore, sealing water lines are provided on both sides of the terminal frame and on the edge of the side where the sealing plate mates with the terminal frame.

[0018] Due to the adoption of the above structure, the beneficial effects of this utility model are as follows:

[0019] This invention, by setting up an end electrode frame, a main electrode plate, and a sealing plate, allows the main electrode plate and the sealing plate to be sealed and bonded to the front and back sides of the end electrode frame during the assembly of the electrolytic cell, forming a hollow chamber. This effectively reduces the weight of components, saves materials, and lowers costs. Furthermore, after the chamber is formed, the support frame is located inside the chamber, effectively supporting the main electrode plate and ensuring that the main electrode plate is separated from the sealing plate, preventing the chamber from becoming too flat. In addition, the end electrode frame and the main electrode plate are connected to form a first component, and the sealing plate and the support frame are connected to form a second component. Both the first and second components are open structures and can be disassembled. This allows the first and second components to be plated separately before assembling the electrolytic cell, and then combined to form the chamber. This effectively ensures that the inner plating of the assembled chamber is uniform and full, avoiding problems such as uneven plating, incomplete plating, and missed plating, and effectively improving the durability and service life of the components.

[0020] The present invention will become clearer from the following description and in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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.

[0022] Figure 1 This is one of the exploded structural diagrams of this utility model;

[0023] Figure 2 This is the second exploded view of the structure of this utility model;

[0024] Figure 3 This is a front view of the present invention;

[0025] Figure 4 This is a cross-sectional view of the present invention.

[0026] Figure 5 This is a partially enlarged view of part A of the present invention;

[0027] Figure 6 This is a front view of the supporting rib of this utility model;

[0028] Figure 7 This is a perspective view of the end pole frame of this utility model;

[0029] Figure 8 This is a front view of the end frame of this utility model;

[0030] Figure 9This is a rear view of the end frame of this utility model.

[0031] Reference numerals in the attached drawings: End electrode frame-1, First alkali channel hole-101, Second alkali channel hole-102, Alkali flow channel-1021, Alkali manifold hole-103, Alkali branch outlet-104, Gas flow channel and outlet-105, Main electrode plate-2, Sealing plate-3, Support frame-4, Support assembly-401, Notch-4011, Bearing support position-4012, Through hole-4013, Welding position-4014, Support plate-402, Chamber-5, Mounting surface-6, Sealing gasket-7, Positioning hole-8, Sealing water line-9. Detailed Implementation

[0032] 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.

[0033] Please refer to Figures 1 to 6 This utility model provides a split-type electrolytic cell end plate, including an end plate frame 1, a main plate 2, a sealing plate 3, and a support frame 4. The end plate frame 1 and the main plate 2 are connected to form a first component, and the sealing plate 3 and the support frame 4 are connected to form a second component. Both the first and second components are open structures and can be disassembled, allowing for plating of the first and second components separately before assembling the electrolytic cell, ensuring smooth flow of the nickel liquid during plating. When the main plate 2 and the sealing plate 3 are sealed and bonded to the front and back sides of the end plate frame 1, a hollow chamber 5 is formed, thereby... Compared to traditional solid end plates, this invention can effectively reduce the weight of components, save materials, and lower costs. Furthermore, since the chamber 5 is composed of the first and second components after plating, it effectively ensures that the plating inside the assembled chamber 5 is uniform and full, avoiding problems such as uneven plating, missing plating, or missed plating, thus effectively improving the durability and service life of the components. Moreover, the support frame 4 is located inside the chamber 5, thereby effectively supporting the main end plate 2 and ensuring that a certain gap is formed between the main end plate 2 and the sealing plate 3, preventing the chamber 5 from becoming too flat.

[0034] It is understood that the end pole frame 1 can be a circular frame such as a ring or an elliptical ring, or a polygonal frame such as a regular polygon or a rectangle. The main pole plate 2 and the sealing plate 3 can be circular, elliptical, regular polygonal, or rectangular. The specific shapes can be adjusted according to the actual situation, and this utility model does not impose specific limitations on them.

[0035] In this invention, a sealing gasket 7 is provided between the end pole frame 1 and the sealing plate 3 for sealing between the end pole frame 1 and the sealing plate 3, thereby improving the sealing performance of the chamber 5.

[0036] In this utility model, the support frame 4 includes a support component 401. One side of the support component 401 is connected to the sealing plate 3 and the other side of the support component 401 is connected to a support plate 402. The support plate 402 abuts against the main electrode plate 2.

[0037] Specifically, the two sides of the support component 401 are welded together with the sealing plate 3 and the support plate 402 to form a second component; when the sealing plate 3 is attached to the end pole frame 1, the support component 401 and the support plate 402 are both located in the chamber 5, and the side of the support plate 402 away from the sealing plate 3 abuts against the main pole plate 2, thereby achieving the effect of support.

[0038] Please refer to Figure 1 , Figure 2 and Figure 6 In this utility model, the support component 401 includes multiple crisscrossing support ribs, and a number of notches 4011 are provided on the support ribs. Each notch 4011 is arranged at intervals along the length direction of the support rib, and a bearing support position 4012 is formed between two adjacent notches 4011.

[0039] Specifically, the two sides of the bearing support position 4012 are welded to the sealing plate 3 and the support plate 402 respectively to form a second component. The sealing plate 3 is separated from the support plate 402 and can support the main electrode plate 2. In addition, the notches 4011 on the multiple parallel support ribs are arranged along the same straight line to form multiple crisscrossing first channels for the alkaline solution to flow through and fill the entire chamber 5.

[0040] Preferably, the long sides of both sides of the support rib are provided with notches 4011, which further improves the smoothness of the alkali flow.

[0041] It is understood that the notch 4011 can be square, semi-circular, or semi-elliptical ring, etc. The specific shape and quantity can be adjusted according to the actual situation, and this utility model does not impose specific restrictions on it.

[0042] In this invention, at least one through hole 4013 is provided on the bearing support position 4012. The through holes 4013 on multiple parallel support ribs are arranged along the same straight line to form multiple crisscrossing second channels, which further improves the smoothness of alkali flow.

[0043] It is understood that the through hole 4013 can be polygonal, circular, or elliptical, and the specific shape and number can be adjusted according to the actual situation. This utility model does not impose specific limitations in this regard.

[0044] In this invention, a welding position 4014 is provided at the bottom of the notch 4011.

[0045] Preferably, the welding position 4014 is a square notch located in the middle of the notch 4011. The two support ribs are connected by welding through the cross-clamping of the welding positions 4014 located on each other.

[0046] Please refer to Figures 7 to 9 In this utility model, the side of the end electrode frame 1 that cooperates with the main electrode plate 2 is provided with a first alkali channel hole 101, a second alkali channel hole 102, a gas flow channel and an outlet 105. Furthermore, the end electrode frame 1 is provided with an alkali confluence hole 103 and an alkali diversion port 104 on the inner wall of the chamber 5. The alkali confluence hole 103 is connected to the first alkali channel hole 101, and the alkali diversion port 104 is connected to the second alkali channel hole 102.

[0047] During operation, the alkaline solution in the internal flow channels of the electrolytic cell sequentially enters the chamber 5 through the first alkaline solution channel hole 101 and the alkaline solution manifold hole 103, and then uniformly fills the entire chamber 5 through the notches 4011 and the through holes 4013. Simultaneously, the alkaline solution in the chamber 5 sequentially enters and fills each electrolysis chamber through the alkaline solution diversion port 104 and the second alkaline solution channel hole 102, ultimately electrolyzing to produce hydrogen / oxygen gas, which is then discharged from the electrolysis chamber through the gas flow channel and outlet 105. The chamber 5 provides a confluence buffer and uniform flow distribution for the alkaline solution pumped into the electrolytic cell. Furthermore, the flow state and flow rate of the alkaline solution flowing from the alkaline solution diversion port 104 into the second alkaline solution channel hole 102 are relatively stable, allowing for relatively uniform flow into each electrolysis chamber. This effectively avoids the serious problem of significantly different alkaline solution flow rates entering each electrolysis chamber, which could severely affect the normal operation of the electrolytic cell.

[0048] It is understood that the shape, quantity, and specific distribution of the gas flow channel and outlet 105, the first alkali channel hole 101, the second alkali channel hole 102, the alkali confluence hole 103, and the alkali diversion port 104 can be adjusted according to the actual situation, and this utility model does not impose specific restrictions in this regard.

[0049] In this invention, some or all of the second alkali channel holes 102 are provided with a plurality of alkali flow channels 1021. When the electrolytic cell is running, the alkali in the flow channels inside the electrolytic cell enters and fills each electrolytic chamber through the alkali flow channels 1021.

[0050] In this invention, the terminal electrode frame 1 is provided with a mounting surface 6. The outer diameter of the mounting surface 6 is smaller than the outer diameter of the terminal electrode frame 1, and the inner diameter of the mounting surface 6 is smaller than the outer diameter of the main electrode plate 2. The edge of the main electrode plate 2 is sealed to the mounting surface 6. The edge of the main electrode plate 2 is tightly fitted to the mounting surface 6 and then welded to ensure the firmness of the weld and the sealing of the weld seam.

[0051] Preferably, the first alkaline solution channel hole 101, the second alkaline solution channel hole 102, the gas flow channel and the outlet 105 are all distributed between the outer edge of the end frame 1 and the outer edge of the mounting surface 6.

[0052] Existing electrolytic cells are assembled by vertically stacking various components. Each component, including the electrolytic cell electrode plates, gasket assemblies, and end plates, has positioning through holes. During installation, positioning rods and these through holes are used to determine the orientation accuracy of each electrode plate, gasket assembly, and end plate. This ensures that the outer circle of each plate, gasket assembly, and end plate corresponds to its opening, allowing the electrolyte and electrolysis-generated gases to flow smoothly into and out of the electrolytic cell. However, because the end plates are solid and integral, their positioning through holes generally cannot be drilled, as this could lead to gas leakage. Therefore, when installing the last end plate, the positioning through holes and positioning rods cannot be used to calibrate and position it, making the positioning of the last end plate cumbersome.

[0053] Therefore, in this invention, at least one positioning hole 8 is provided on the end electrode frame 1, and the positioning hole 8 penetrates both sides of the end electrode frame 1. When the electrolytic cell is assembled to the final end electrode plate, it is easy to see from the back of the end electrode frame 1 whether the positioning hole 8 is aligned with the positioning through hole and can be positioned using a positioning rod, ensuring the positioning accuracy of the end electrode plate installation. After positioning is completed, a sealing gasket 7 and a sealing plate 3 are placed on the side of the end electrode frame 1 away from the main electrode plate 2 to seal the positioning hole 8, effectively preventing electrolytic gas from leaking from the positioning hole 8.

[0054] In this invention, sealing water lines 9 are provided on both sides of the terminal frame 1 and on the edge of the side where the sealing plate 3 mates with the terminal frame 1. The sealing gasket 7 is attached to the sealing water lines 9 on both sides of the mating surfaces of the sealing plate 3 and the terminal frame 1, thereby improving the sealing performance of the chamber 5. The sealing water line 9 located on the side where the terminal frame 1 mates with the main electrode plate 2 is attached to the gasket assembly of the electrolysis chamber, thereby improving the sealing performance of the electrolysis chamber.

[0055] Preferably, the sealing water line 9 is located between the outer edge of the end frame 1 and the outer edge of the mounting surface 6, and the first alkaline solution channel hole 101, the second alkaline solution channel hole 102, the gas flow channel and the outlet 105 are all surrounded inside the sealing water line 9.

[0056] Working principle:

[0057] Before assembling the electrolytic cell, the edge of the main electrode plate 2 is first tightly attached to the mounting surface 6 and welded to form the first component. Then, the sealing plate 3 and the support plate 402 are welded to both sides of the support component 401 to form the second component. Then, the first component and the second component are electroplated (or chemically plated) to make a nickel plating layer on their surfaces. After the plating is completed, they are cleaned and sealed for assembly.

[0058] When assembling the electrolytic cell, first position and install the other components of the electrolytic cell; when it is necessary to install the electrolytic cell end plate located at the bottom of the electrode cell, first position and install the second component, then position and install the sealing gasket 7, then position and install the first component, and then install the other electrolytic chamber components; when it is necessary to install the electrolytic cell end plate located at the top of the electrode cell, first position and install the first component, then position and install the sealing gasket 7, then position and install the second component, and finally install the remaining electrolytic cell components, thereby completing the assembly of the electrolytic cell; after the electrolytic cell is assembled and locked, the two separate electrolytic cell end plates are located at both ends of the electrolytic cell, and the end plate 1, sealing gasket 7, and sealing plate 3 are tightly fitted together to form a complete and sealed chamber 5;

[0059] When the electrolytic cell is running, the alkaline solution in the internal flow channel of the electrolytic cell enters the chamber 5 sequentially through the first alkaline solution channel hole 101 and the alkaline solution manifold hole 103, and then evenly fills the entire chamber 5 through each notch 4011 and each through hole 4013; at the same time, the alkaline solution in the chamber 5 enters and fills each electrolysis chamber sequentially through the alkaline solution diversion port 104, the second alkaline solution channel hole 102 and the alkaline solution flow channel 1021, and finally electrolyzes in the electrolysis chamber to produce hydrogen / oxygen and discharges from the electrolysis chamber through the gas flow channel and outlet 105.

[0060] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A split-type electrolytic cell end plate, characterized in that: The assembly includes an end pole frame (1), a main pole plate (2), a sealing plate (3), and a support frame (4). The end pole frame (1) and the main pole plate (2) are connected to form a first assembly, and the sealing plate (3) and the support frame (4) are connected to form a second assembly. When the main pole plate (2) and the sealing plate (3) are sealed and fitted to the front and back sides of the end pole frame (1), a hollow cavity (5) is formed, and the support frame (4) is located within the cavity (5). The support frame (4) includes a support component (401). One side of the support component (401) is connected to the sealing plate (3) and the other side of the support component (401) is connected to the support plate (402). The support plate (402) abuts against the main pole plate (2). The support component (401) includes multiple crisscrossing support ribs. Several notches (4011) are provided on the support ribs. Each notch (4011) is arranged at intervals along the length direction of the support rib and a bearing support position (4012) is formed between two adjacent notches (4011).

2. The split-type electrolytic cell end plate according to claim 1, characterized in that: At least one through hole (4013) is provided on the bearing support position (4012), and a welding position (4014) is provided at the bottom of the notch (4011).

3. A split-type electrolytic cell end plate according to claim 1 or 2, characterized in that: The end electrode frame (1) is provided with a first alkaline solution channel hole (101), a second alkaline solution channel hole (102), a gas flow channel and an outlet (105) on the side that cooperates with the main electrode plate (2). Furthermore, the end electrode frame (1) is provided with an alkaline solution manifold hole (103) and an alkaline solution diversion port (104) on the inner wall of the chamber (5). The alkaline solution manifold hole (103) is connected to the first alkaline solution channel hole (101), and the alkaline solution diversion port (104) is connected to the second alkaline solution channel hole (102).

4. The split-type electrolytic cell end plate according to claim 3, characterized in that: Some or all of the second alkali channel holes (102) are provided with a number of alkali flow channels (1021).

5. A split-type electrolytic cell end plate according to claim 1 or 2, characterized in that: The terminal frame (1) is provided with a mounting surface (6). The outer diameter of the mounting surface (6) is smaller than the outer diameter of the terminal frame (1) and the inner diameter of the mounting surface (6) is smaller than the outer diameter of the main electrode plate (2). The edge of the main electrode plate (2) is sealed to the mounting surface (6).

6. A split-type electrolytic cell end plate according to claim 1 or 2, characterized in that: A sealing gasket (7) is provided between the terminal frame (1) and the sealing plate (3).

7. A split-type electrolytic cell end plate according to claim 1 or 2, characterized in that: At least one positioning hole (8) is provided on the end pole frame (1), and the positioning hole (8) penetrates both sides of the end pole frame (1).

8. A split-type electrolytic cell end plate according to claim 1 or 2, characterized in that: Sealing water lines (9) are provided on both sides of the terminal frame (1) and on the edge of the side of the sealing plate (3) that mates with the terminal frame (1).

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