A kind of welding deformation prevention jig for bipolar plate of hydrogen production electrolyzer of alkaline electrolytic water

Abstract

The utility model discloses a kind of alkaline electrolytic water hydrogen production electrolytic cell bipolar plate welding deformation prevention jigs, it is related to electrolytic cell bipolar plate welding technical field, including jig seat component, adjusting frame component and clamping plate component, the left and right two ends surface of jig seat component is symmetrically installed with adjusting frame component, the clamping plate component is connected in the top end side of adjusting frame component.This alkaline electrolytic water hydrogen production electrolytic cell bipolar plate welding deformation prevention jig, through the cooperation of jig seat component, adjusting frame component and clamping plate component etc. component, effective deformation prevention control in the bipolar plate welding process is realized, jig seat component is as basic support part, provides stable mounting platform for entire jig;Adjusting frame component can be flexibly adjusted according to the size and shape of bipolar plate, ensure the uniform distribution of clamping force;Clamping plate component is directly contacted with bipolar plate, through accurate clamping design, prevent the deformation of bipolar plate due to uneven heating or external force during welding process.

Description

Technical Field

[0001] This utility model relates to the field of bipolar plate welding technology for electrolytic cells, specifically a welding anti-deformation fixture for bipolar plates of an alkaline water electrolysis hydrogen production electrolytic cell. Background Technology

[0002] Alkaline water electrolysis for hydrogen production refers to the process of producing hydrogen by electrolyzing water in an alkaline electrolyte environment. The electrolyte is typically a 30% KOH solution or a 26% NaOH solution. The core principle is that under the action of direct current, water in the electrolyte is decomposed into hydrogen and oxygen through an electrochemical reaction in the electrolytic cell.

[0003] Bipolar plates, also known as current collectors, are key components in water electrolysis hydrogen production equipment. They are typically metal plates with flow channels, on the order of millimeters in thickness, and with finely distributed grooves or indentations on their surface. These channels guide the flow of the electrolyte, ensuring that the reactants are evenly distributed across the electrode surface.

[0004] Electrolytic cell bipolar plate welding refers to the process of connecting different components that make up a bipolar plate, such as metal plates with flow channels and frames, into a complete and functional bipolar plate assembly using specific welding techniques.

[0005] Conventional welding fixtures for bipolar plates in electrolytic cells have many limitations when dealing with complex welding scenarios. For example, traditional fixtures often lack flexible adjustment mechanisms and are difficult to precisely adapt to the specific size and shape of the bipolar plates. This results in the inability to provide uniform clamping force during the welding process, which in turn causes the bipolar plates to deform due to uneven heating or external forces. Utility Model Content

[0006] The purpose of this invention is to provide a welding fixture for anti-deformation of bipolar plates in an alkaline water electrolysis hydrogen production electrolyzer, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a welding anti-deformation fixture for bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer, comprising a fixture base component, an adjustment frame component, and a clamping plate component. The adjustment frame component is symmetrically installed on both the left and right end surfaces of the fixture base component. The clamping plate component is connected to one side of the top of the adjustment frame component. The adjustment frame component includes a movable seat, a positioning bolt, a damping hinge, a fastening bolt, and a connecting angle plate. Positioning bolts are horizontally installed on both sides of the lower middle part of the movable seat, and a damping hinge is installed on the top of the movable seat. A fastening bolt is horizontally installed at the axis of the damping hinge, and a connecting angle plate is installed on the top of the damping hinge.

[0008] Further, the jig base member includes a base, support slide rails and fixed foot stands, the support slide rails are symmetrically and horizontally installed at the front and rear ends of the top surface of the base, and the fixed foot stands are installed at both left and right ends of the base in a front-rear symmetrical manner.

[0009] Further, the base is integrally configured in a shape of the Chinese character "Ri", and the fixed foot stands are installed at four diagonal positions of the base.

[0010] Further, four diagonal positions at the joint between the fixed foot stand and the base are all provided with hole structures for bolt installation, and the bottom surface of the fixed foot stand is provided with hole structures for bolt installation in an array arrangement.

[0011] Further, a slotted embedded structure is adopted between the bottom of the movable seat and the support slide rail, and the movable seat is in threaded connection with the positioning bolt.

[0012] Further, four diagonal positions at the top of the movable seat and the bottom of the damping hinge are all provided with hole structures for bolt installation, and four diagonal positions at the top of the damping hinge and the bottom of the connecting angle plate are all provided with hole structures for bolt installation.

[0013] Further, the clamping plate member includes a stabilizing plate, a support frame, fixing blocks and docking inserting piles, the bottom edge of the stabilizing plate is provided with the support frame, the side of the support frame close to the adjusting frame member is symmetrically provided with the fixing blocks in left-right direction, and the middle part of the side of the fixing block close to the adjusting frame member is provided with four sets of docking inserting piles in an array arrangement.

[0014] Further, the support frame and the fixing block are configured as an integral structure, the surfaces of the joints between the fixing blocks and the connecting angle plate are all provided with hole structures for bolt installation in an array arrangement, the surface of the side of the connecting angle plate close to the fixing block is provided with jack structures matching the outer surface structure of the docking inserting piles, and the stabilizing plate is made of a high-strength alloy material with a low thermal expansion coefficient for use.

[0015] The utility model provides a welding deformation-preventing jig for bipolar plates of an alkaline electrolyzed water hydrogen production electrolyzer, which has the following beneficial effects: 1. In the present utility model, through the structural arrangement of the adjusting frame member, the slotted embedded structure of the moving seat and the supporting slide rail, in cooperation with the thread locking mechanism of the positioning bolt, enables the adjusting frame member to maintain precise positioning during horizontal displacement, effectively preventing deformation errors caused by jig shaking during the welding of bipolar plates. The axial adjustment function of the damping hinge via the fastening bolt enables multi-angle flexible rotation of the clamping plate member, while ensuring the stable plate is completely attached to the surface of the bipolar plate. The insertion hole structure formed on the top connecting angle plate forms a mechanical interlock with the docking plug, which further enhances the structural stability during the welding process. This composite adjusting mechanism design not only meets the clamping requirements of bipolar plates of different specifications, but also controls the welding deformation within a very small error range through the multi-dimensional positioning system, significantly improving the welding qualification rate of electrolytic cell bipolar plates.

[0016] 2. In the present utility model, the use of the jig base member adopts a "日"-shaped structure for the base, in cooperation with the supporting slide rails arranged symmetrically in the front and rear directions, to form a dual-track parallel support system, which ensures uniform stress on the adjusting frame member during horizontal movement. The fixed foot stands installed at its four diagonal positions can be firmly anchored to the workbench through the two-layer upper and lower bolt hole structures, effectively dispersing the vibration energy generated during welding operations. The hollowed-out area in the middle of the base not only reduces the overall weight, but also provides operating space for the lifting operation of the electrolytic cell bipolar plate. This frame-type structural design enables the jig to maintain structural rigidity even when subjected to high-frequency clamping operations. The slotted embedded fit adopted by the supporting slide rail and the moving seat can realize precise positioning adjustment of the adjusting frame member through the thread locking function of the positioning bolt, meeting the requirements of high-precision welding processes.

[0017] 3. In the present utility model, through the arrangement of the clamping plate member structure, the stable plate made of a high-strength alloy material with a low thermal expansion coefficient effectively inhibits its own deformation in a high-temperature welding environment, ensuring the flatness accuracy of the contact surface with the bipolar plate. The integral forming process of the support frame and the fixed block improves the structural rigidity by eliminating assembly gaps. The bolt holes distributed in an array on its surface form multi-point rigid connections with the connecting angle plate, and in cooperation with the mechanical positioning of the docking plugs and the insertion hole structure, the clamping plate member maintains structural stability when subjected to welding stress. The array layout of the four sets of docking plugs not only disperses the clamping force but also avoids local stress concentration. This composite anti-deformation design enables the bipolar plate to always maintain the designed form and position tolerance during the welding process, significantly improving the assembly accuracy of the electrolytic cell and the qualification rate of air tightness detection, so as to minimize the deformation problem that occurs during the welding process of the electrolytic cell bipolar plate. Brief Description of the Drawings

[0018] Figure 1 is a schematic isometric view of the main body structure of the anti-deformation jig for welding the bipolar plate of the alkaline water electrolysis hydrogen production electrolytic cell according to the present utility model; Figure 2This is a schematic diagram of the fixture seat component of a welding anti-deformation fixture for bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer according to the present invention. Figure 3 This is a three-dimensional structural diagram of the adjustment frame component of the anti-deformation fixture for welding bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer according to the present invention. Figure 4 This is a three-dimensional structural diagram of the clamping plate component of a bipolar plate welding anti-deformation fixture for an alkaline water electrolysis hydrogen production electrolyzer according to this utility model.

[0019] In the diagram: 1. Fixture base component; 101. Base; 102. Support slide rail; 103. Fixed leg; 2. Adjustable frame component; 201. Moving seat; 202. Positioning bolt; 203. Damping hinge; 204. Fastening bolt; 205. Connecting angle plate; 3. Clamping plate component; 301. Stabilizing plate; 302. Support frame; 303. Fixing block; 304. Connecting stake. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] like Figures 1 to 4As shown, a welding anti-deformation fixture for bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer includes a fixture base component 1, an adjusting frame component 2, and a clamping plate component 3. The adjusting frame component 2 is symmetrically mounted on both the left and right ends of the fixture base component 1. The clamping plate component 3 is connected to one side of the top of the adjusting frame component 2. The adjusting frame component 2 includes a movable seat 201, a positioning bolt 202, a damping hinge 203, a fastening bolt 204, and a connecting angle plate 205. Positioning bolts 202 are horizontally mounted on both sides of the lower middle portion of the movable seat 201, and a damping hinge 203 is mounted on the top of the movable seat 201. A fastening bolt 204 is horizontally mounted at the axis of the damping hinge 203, and a fastening bolt 204 is mounted on the top of the damping hinge 203. The connecting angle plate 205 has a slotted embedded structure between the bottom of the movable seat 201 and the support slide rail 102, and the movable seat 201 and the positioning bolt 202 are threaded together. The top of the movable seat 201 and the bottom of the damping hinge 203 are provided with holes for bolt installation at the four opposite corners. The top of the damping hinge 203 and the bottom of the connecting angle plate 205 are also provided with holes for bolt installation at the four opposite corners. The damping characteristics of the damping hinge 203 can provide a stable damping force when adjusting the angle of the clamping plate component 3, so that the angle adjustment process is smooth and stable, avoiding sudden shaking or displacement, and ensuring that the stabilizing plate 301 can accurately fit the surface of the bipolar plate. During welding operations, the high temperatures generated by welding will cause the various components of the fixture to heat up. However, since the stabilizing plate 301 is made of a high-strength alloy material with a low coefficient of thermal expansion, its deformation after heating is minimal. It can always maintain a good contact state with the bipolar plate and will not affect the welding quality of the bipolar plate due to its own deformation. When the adjusting frame component 2 moves horizontally, the slotted embedded cooperation between the support slide rail 102 and the moving seat 201, along with the threaded locking of the positioning bolt 202, makes the moving seat 201 move accurately and stably in the horizontal direction without any deviation or shaking. This ensures the positioning accuracy of the clamping plate component 3 in the horizontal direction and provides a basic guarantee for the precise welding of the bipolar plate.

[0022] like Figures 1 to 4As shown in the figure, the fixture base member 1 includes a base 101, support slide rails 102 and fixed foot stands 103. The support slide rails 102 are symmetrically and horizontally installed at the front and rear ends of the top surface of the base 101, and the fixed foot stands 103 are symmetrically installed at the left and right ends of the base 101 in the front-rear direction. The base 101 is entirely configured in a "日"-shaped structure, and the fixed foot stands 103 are installed at four diagonal positions of the base 101. Four diagonal positions at the connection between the fixed foot stand 103 and the base 101 are all provided with hole structures for bolt installation, and the bottom surface of the fixed foot stand 103 is provided with hole structures for bolt installation in an array. By using the base 101 with the "日"-shaped structure, its unique frame design can effectively disperse the vibration energy generated during welding operations, so that the entire fixture can maintain structural rigidity even when subjected to high-frequency clamping operations. The support slide rails 102 arranged symmetrically in the front and rear form a dual-rail parallel support system, which ensures that the adjusting frame member 2 is evenly stressed during the horizontal movement process, and deformation or damage caused by excessive local stress will not occur. The fixed foot stands 103 installed at the four diagonal positions can be firmly anchored to the workbench through the two layers of upper and lower bolt hole structures. During the welding process, even if a large external force impact is encountered, the fixture can be firmly fixed on the workbench without displacement, providing a stable operating environment for welding operations.

[0023] As Figures 1 to 4 shown in the figure, the clamping plate member 3 includes a stabilizing plate 301, a support frame 302, fixing blocks 303 and docking studs 304. The bottom edge of the stabilizing plate 301 is provided with the support frame 302, and the side of the support frame 302 close to the adjusting frame member 2 is symmetrically provided with the fixing blocks 303 on the left and right. Moreover, four sets of docking studs 304 are arranged in an array at the middle part of the side of the fixing block 303 close to the adjusting frame member 2. The support frame 302 and the fixing block 303 are configured as an integral structure, and the surfaces of the connection parts between the fixing block 303 and the connecting angle plate 205 are all provided with hole structures for bolt installation in an array. Furthermore, the surface of the side of the connecting angle plate 205 close to the fixing block 303 is provided with socket structures that match the outer surface structures of the docking studs 304. The stabilizing plate 301 is made of a high-strength alloy material with a low thermal expansion coefficient. By utilizing the characteristic of the low thermal expansion coefficient of the stabilizing plate 301, when the ambient temperature rises during the welding process, it will not undergo obvious expansion deformation like ordinary materials, and can always maintain a good fitting state with the surface of the bipolar plate, providing a stable contact surface for welding and ensuring welding quality. The integrated structure of the support frame 302 and the fixing block 303 eliminates the possible assembly gap in the traditional assembly method, greatly improves the structural rigidity of the entire clamping plate member 3, making it more stable and less prone to deformation when subjected to welding stress.

[0024] In summary, as Figures 1 to 4As shown in the figure, in use, for this anti-deformation jig for welding bipolar plates of alkaline electrolyzed water hydrogen production electrolyzers, first, the jig base component 1 is stably installed on the workbench using bolts through the bolt hole structures at the bottom of the fixed foot stand 103 and at the joint, ensuring that the "day"-shaped structure of the base 101 is parallel to and in close contact with the surface of the workbench, so as to form a stable supporting foundation; Next, adjust the position of the adjusting frame component 2 according to the specification and size of the bipolar plate to be welded. By loosening the positioning bolt 202, the moving seat 201 moves horizontally on the support slide rail 102. After moving to a suitable position, tighten the positioning bolt 202, which uses its threaded connection with the moving seat 201 to accurately position the moving seat 201 on the support slide rail 102, preventing shaking during the subsequent welding process; Then, adjust the damping hinge 203. By rotating the fastening bolt 204, an appropriate damping force is generated at the axis of the damping hinge 203, so that the connecting angle plate 205 drives the clamping plate component 3 to flexibly rotate at multiple angles until the stabilizing plate 301 is completely attached to the surface of the bipolar plate. At this time, the docking inserting pile 304 is inserted into the jack structure on the connecting angle plate 205 to form a mechanical interlock, which further enhances the structural stability during the welding process. The bipolar plate is stably clamped and fixed through the adjustment of the above structure arrangement; During the welding process, the high-strength alloy material with low thermal expansion coefficient adopted for the stabilizing plate 301 can effectively inhibit its own deformation in the high-temperature welding environment, ensuring the flatness accuracy of the contact surface with the bipolar plate. The integral forming process of the support frame 302 and the fixing block 303 eliminates assembly gaps and improves structural rigidity. The bolt holes distributed in an array on its surface form multi-point rigid connection with the connecting angle plate 205, which cooperates with the mechanical positioning of the docking inserting pile 304 and the jack structure to keep the structural stability of the clamping plate component 3 when bearing welding stress. The array layout of the four sets of docking inserting piles 304 not only disperses the clamping force but also avoids local stress concentration, so that the bipolar plate always maintains the designed geometric tolerance during the welding process, significantly improving the electrolyzer assembly accuracy and the qualification rate of air tightness detection.

[0025] The embodiments of the present utility model are presented for the purpose of illustration and description, and are not exhaustive or intended to limit the present utility model to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present utility model, and to enable those of ordinary skill in the art to understand the present utility model so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A welding anti-deformation fixture for bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer, comprising a fixture base component (1), an adjustment frame component (2), and a clamping plate component (3), characterized in that: Adjusting structural members (2) are installed symmetrically front and rear on the surfaces of the left and right ends of the jig base member (1), and the clamping plate member (3) is connected to one side of the top end of the adjusting structural member (2). The adjusting structural member (2) comprises a moving seat (201), a positioning bolt (202), a damping hinge (203), a fastening bolt (204) and a connecting angle plate (205). The positioning bolt (202) is horizontally installed on both sides of the middle part of the lower end of the moving seat (201), the damping hinge (203) is installed on the top of the moving seat (201), the fastening bolt (204) is horizontally installed at the axis of the damping hinge (203), and the connecting angle plate (205) is installed on the top of the damping hinge (203).

2. The anti-deformation fixture for welding bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer according to claim 1, characterized in that, The jig base member (1) comprises a base (101), support slide rails (102) and fixing foot stands (103). The support slide rails (102) are symmetrically and horizontally installed at the front and rear ends of the top surface of the base (101), and the fixing foot stands (103) are installed symmetrically front and rear at both the left and right ends of the base (101).

3. The anti-deformation fixture for welding bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer according to claim 2, characterized in that, The base (101) is entirely configured in a shape of the Chinese character "ri", and the fixing foot stands (103) are installed at the four diagonal positions of the base (101).

4. The anti-deformation fixture for welding bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer according to claim 2, characterized in that, Hole structures for bolt installation are provided at the four diagonal positions of the joint between the fixing foot stand (103) and the base (101), and hole structures for bolt installation are arranged in an array on the bottom surface of the fixing foot stand (103).

5. The anti-deformation fixture for welding bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer according to claim 2, characterized in that, A slotted embedded structure is adopted between the bottom of the moving seat (201) and the support slide rail (102), and the moving seat (201) is in threaded connection with the positioning bolt (202).

6. The anti-deformation fixture for welding bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer according to claim 1, characterized in that, Hole structures for bolt installation are provided at the four diagonal positions of the top of the moving seat (201) and the bottom of the damping hinge (203), and hole structures for bolt installation are provided at the four diagonal positions of the top of the damping hinge (203) and the bottom of the connecting angle plate (205).

7. The anti-deformation fixture for welding bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer according to claim 1, characterized in that, The clamping plate member (3) comprises a stabilizing plate (301), a support frame (302), fixing blocks (303) and docking insertion piles (304). A support frame (302) is arranged at the bottom edge of the stabilizing plate (301), the fixing blocks (303) are arranged symmetrically left and right on the side of the support frame (302) close to the adjusting structural member (2), and four sets of docking insertion piles (304) are arranged in an array in the middle of the side of the fixing block (303) close to the adjusting structural member (2).

8. The anti-deformation fixture for welding bipolar plates of an alkaline water electrolysis hydrogen production electrolyzer according to claim 7, characterized in that, The support frame (302) and the fixing block (303) are arranged as an integral structure, hole structures for bolt installation are arranged in an array on the surfaces of the joint between the fixing block (303) and the connecting angle plate (205), and the surface of the side of the connecting angle plate (205) close to the fixing block (303) is provided with insertion hole structures that match the outer surface structure of the docking insertion piles (304). The stabilizing plate (301) is made of a high-strength alloy material with a low thermal expansion coefficient for use.

Images