Isolation composite assembly for water electrolysis hydrogen production

Abstract

The utility model discloses an isolation composite component for water electrolysis hydrogen production, which comprises a gasket and a diaphragm, an accommodating groove is arranged on the inner side wall of the gasket, the periphery of the diaphragm is arranged in the accommodating groove and is connected with the gasket into a whole, and sealing waterlines are arranged on two surfaces of the gasket. According to the utility model, the flatness of the diaphragm can be effectively ensured, the assembly difficulty is low, and the efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of water electrolysis hydrogen production, in particular to an isolation composite component used for water electrolysis hydrogen production. Background Art

[0002] In the water electrolysis hydrogen production electrolyzer, the gasket and the diaphragm are separate parts. During installation, the diaphragm is placed between the gasket and the pole frame, or sandwiched between two gaskets, by extrusion.

[0003] At present, the commonly used gasket is a flat gasket, and the pole frame has a sealing waterline. The gasket and the pole frame need to be disassembled after use. The gasket will have an indentation of the sealing waterline. When it is used again, it is necessary to ensure that the gasket indentation fits the pole frame sealing waterline. Due to the hydrophilicity of the diaphragm, the alkaline liquid inside the electrolytic cell can easily penetrate along the inside of the diaphragm. When it is reassembled, the gasket indentation is not in good contact with the pole frame sealing waterline, which will cause the alkaline liquid to seep out from between the two gaskets and cause leakage.

[0004] In addition, in the assembly method of the existing structure, multiple people are required to cooperate to first install the gasket, then flatten the diaphragm to one side of the gasket, and then place the second gasket. While placing it, the flatness of the diaphragm must be ensured at all times, and finally the pole frame is pressed tightly. If the diaphragm is not flat, it will affect the electrolysis efficiency. In addition, this method is complicated to assemble, and one person cannot complete the assembly work, which requires high difficulty. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide an isolation composite component for producing hydrogen by water electrolysis, which can effectively ensure the flatness of the diaphragm and has low assembly difficulty and high efficiency.

[0006] In order to solve the above technical problems, the utility model provides an isolation composite component for water electrolysis to produce hydrogen, including a gasket and a diaphragm, wherein a receiving groove is arranged on the inner side wall of the gasket, the periphery of the diaphragm is arranged in the receiving groove and is connected to the gasket as a whole, and sealing water lines are arranged on both surfaces of the gasket.

[0007] Furthermore, a core material is arranged inside the gasket, and the core material is arranged on both sides of the diaphragm.

[0008] Furthermore, the core material is a mesh cloth structure, and the core material is made of PA6, SUS304 or PVDF.

[0009] Furthermore, the diaphragm is arranged at a middle position in the thickness direction of the gasket.

[0010] Furthermore, the gasket is made of EPDM or chloroprene rubber.

[0011] Furthermore, the gasket and the periphery of the diaphragm are integrally vulcanized.

[0012] Furthermore, glue is provided in the receiving groove, and the diaphragm is fixed in the receiving groove by glue and vulcanized as an integral unit.

[0013] Furthermore, the gasket is annular or square.

[0014] Furthermore, a flow channel hole is provided on the gasket.

[0015] Beneficial effects of the utility model:

[0016] 1. The integrated design of the gasket and the diaphragm has both the sealing properties of the gasket and the gas-isolating properties of the diaphragm. The gasket and the diaphragm can be assembled in one installation, which greatly reduces the difficulty of assembly. At the same time, it can ensure that the diaphragm is laid flat to avoid affecting the electrolysis efficiency due to assembly problems.

[0017] 2. Since the gasket is wrapped around the periphery of the diaphragm, it can effectively prevent the alkaline solution from penetrating from the inside of the diaphragm to the outside, and avoid the leakage of the electrolytic cell at this position;

[0018] 3. The gasket cross section adopts serrated sealing waterline, which not only ensures effective sealing, but also solves the problem of surface indentation, thereby reducing the difficulty of repeated assembly; BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model taking a circular structure as an example;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the utility model being connected with the electrode frame;

[0022] Figure 4 It is a schematic diagram of a sealing waterline with a square structure adopted in the utility model. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0024] Reference Figures 1 to 3As shown, an embodiment of the isolation composite component for hydrogen production by water electrolysis of the utility model includes a gasket 1 and a diaphragm 2. The gasket is made of EPDM (ethylene propylene diene monomer rubber) or chloroprene rubber, and the diaphragm is made of PPS diaphragm and composite diaphragm for hydrogen production by water electrolysis. A receiving groove 3 is arranged on the inner wall of the gasket, and the periphery of the diaphragm is arranged in the receiving groove and connected with the gasket as a whole, which is a gasket membrane assembly. Sealing waterlines 4 are arranged on both surfaces of the gasket. The gasket is connected in a wrapped manner around the diaphragm. Although the alkali solution in the electrolytic cell can penetrate into the diaphragm, it will eventually be blocked in the containing tank and cannot seep out from this position, thus solving the problem of leakage in the double gasket structure; and after the gasket surface is provided with a sealing water line, when it is pressed and fixed by the pole frame 111, the sealing water line of the gasket will be squeezed to form a certain deformation, which can produce a good contact effect with the pole frame and further improve the sealing performance. In the assembly process, since the pole frame has its own sealing water line, it is only necessary to consider the alignment of the composite component with the pole frame flow channel hole, and there is no need to consider other installation positions, and a good sealing effect can be achieved. The diaphragm is set in the middle position of the gasket thickness direction to ensure that the thickness of the gaskets corresponding to the two sides of the diaphragm is consistent, and to ensure the position accuracy of the diaphragm after assembly.

[0025] In order to firmly combine the gasket and the diaphragm into one, the gasket can be made of at least two sheets, the sheets sandwich the diaphragm in the middle, and then formed through an integrated vulcanization process, so that multiple sheets form a gasket, and the diaphragm in the middle is bonded in the middle, effectively forming an integrated structure with high connection strength and not easy to separate.

[0026] Among them, refer to Figure 3 As described above, when the gasket is designed with a sealing water line, when it is connected with the pole frame, the pole frame can adopt a planar structure, and a partition 112 is also provided on the pole frame to effectively form an electrolysis space of a single unit; of course, a sealing water line can also be provided on the pole frame, and the sealing water line on the gasket and the sealing water line on the pole frame are staggered and matched, so that the installation position of the gasket can be fixed while meeting the sealing effect.

[0027] The above-mentioned gasket is annular or square, and is selected according to the shape of the electrolytic cell. Specifically, if a circular slot upper and lower array is used for installation, the gasket membrane assembly and the pole frame are in a horizontal state. First, slightly tighten the periphery of the gasket membrane assembly to make the membrane in a uniformly open state, and then use special glue to gradually stick the gasket membrane assembly together along one side of the pole frame. When sticking, ensure that the membrane is in an open state, and that the flow channel holes of the gasket membrane assembly are aligned with the pole frame holes. Finally, use another pole frame to press the gasket membrane assembly from top to bottom so that the gasket membrane assembly and the pole frame are in a pressed state.

[0028] If the square slot front and rear array is used for installation, the gasket membrane assembly and the pole frame are in a vertical state. First, slightly tighten the four sides of the gasket membrane assembly to make the membrane evenly open. Then use special glue to gradually stick the gasket membrane assembly together along one side of the pole frame. When sticking, ensure that the membrane is in an open state. Finally, use another pole frame to squeeze the gasket membrane assembly so that the gasket membrane assembly and the pole frame are in an extruded state.

[0029] During the above installation, the assembly can be completed with the assistance of 1-2 persons. Assembling the gasket membrane assembly once is equivalent to completing the assembly of two gaskets and one diaphragm in the existing assembly process. In addition, there is no need to consider the displacement of adjacent components during the assembly process. The operation is easy and efficient. The gasket is provided with a flow channel hole 6 to form a flow space for the liquid.

[0030] Since the extrusion force of the two pole frames is applied to the gasket, in order to increase the service life of the gasket, a core material 5 is arranged inside the gasket. The core material is arranged on both sides of the diaphragm, which can enhance the crushing strength of the gasket and improve the durability of the gasket. The core material is made of PA6, SUS304 or PVDF. During the preparation of the gasket, the core material is arranged between the sheets at the corresponding position, and then the vulcanization process is carried out to form an integrated structure. The core material is a mesh cloth structure, and the core material can be effectively arranged inside the gasket to avoid separation problems.

[0031] In one embodiment, glue may also be provided in the receiving groove, and the diaphragm is fixed in the receiving groove by glue. That is, during the sheet stacking process, a small amount of glue is coated on the surface of the sheet adjacent to the diaphragm, so that the diaphragm is pre-bonded to the sheet, and then placed in a mold for vulcanization process. This can improve the flatness of the diaphragm during the vulcanization process, and ultimately improve the quality of the integrated structure.

[0032] The above embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in this technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. An isolation composite assembly for producing hydrogen by water electrolysis, characterized in that: It comprises a gasket and a diaphragm. The inner side wall of the gasket is provided with a receiving groove. The periphery of the diaphragm is arranged in the receiving groove and connected with the gasket as a whole. Sealing waterlines are arranged on both surfaces of the gasket.

2. An isolation composite assembly for producing hydrogen by water electrolysis as claimed in claim 1, characterized in that: A core material is arranged inside the gasket, and the core material is arranged on both sides of the diaphragm.

3. An isolation composite assembly for producing hydrogen by water electrolysis as claimed in claim 2, characterized in that: The core material is a mesh cloth structure, and the core material is made of PA6, SUS304 or PVDF.

4. The isolation composite assembly for producing hydrogen by water electrolysis according to claim 1, characterized in that: The diaphragm is arranged at a middle position in the thickness direction of the gasket.

5. The isolation composite assembly for producing hydrogen by water electrolysis according to claim 1, characterized in that: The gasket is made of EPDM or chloroprene rubber.

6. An isolation composite assembly for producing hydrogen by water electrolysis as claimed in claim 5, characterized in that: The gasket and the periphery of the diaphragm are integrally vulcanized.

7. The isolation composite assembly for producing hydrogen by water electrolysis according to claim 1, characterized in that: Glue is arranged in the containing groove, and the diaphragm is fixed in the containing groove by glue and vulcanized in one piece.

8. The isolation composite assembly for producing hydrogen by water electrolysis according to claim 1, characterized in that: The gasket is annular or square.

9. The isolation composite assembly for producing hydrogen by water electrolysis according to claim 1, characterized in that: The gasket is provided with a flow channel hole.

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