Sealing gasket for electrolytic bath

Abstract

The sealing gasket comprises a gasket body, an opening, a plurality of runner holes, a plurality of positioning holes and a plurality of stress release grooves, the gasket body is of a soft sheet-shaped structure, the opening is formed in the center of the gasket body, the runner holes, the positioning holes and the stress release grooves are formed in the periphery of the opening, every three positioning holes are formed in a ring body in a group, and the stress release grooves are formed in the ring body. At least one center line of a triangle formed by connecting lines of midpoints of the positioning holes in the same group passes through the circle center of the ring body, the flow channel holes are evenly formed in the gasket and provided with flexible stabilizing structures used for stabilizing flow channels, and the stress release grooves are evenly formed in the sealing gasket and are groove bodies with the same shape and size as the flow channel holes. The stress release structure is adopted to release stress caused by directional deformation of the sealing gasket after installation, and damage to the sealing gasket is avoided. The stress release groove structure is adopted to release stress caused by directional deformation of the sealing gasket after installation, and damage to the sealing gasket is avoided.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production by water electrolysis, and in particular to a sealing gasket for an electrolyzer. Background Technology

[0002] Electrolysis of water to produce hydrogen is the process by which water molecules decompose into hydrogen and oxygen under the action of direct current. The device that generates the entire water electrolysis reaction is an electrolytic cell. An electrolytic cell is formed by connecting multiple electrolysis chambers in series, and each chamber includes an electrode plate, a sealing gasket, an electrode frame, an electrode, and a diaphragm structure.

[0003] In existing technologies, the electrode plates in novel alkaline electrolyzers consist of a plate body and an electrode frame. A PTFE (polytetrafluoroethylene) gasket is used to seal the space between the plate body and the electrode frame. This gasket requires custom manufacturing from a specialized manufacturer, resulting in high costs. Furthermore, PTFE has poor elasticity and compressibility, tending to flow under high loads and potentially rupturing, weakening the sealing effect and posing safety hazards. Additionally, to achieve better sealing, the electrolyzer needs to be pressurized after assembly to seal each chamber. During pressurization, the gaskets between the electrode frames are compressed and deformed, with the deformation exceeding the electrode frame boundaries. This can affect the smooth flow of electrolyte within the electrolyzer's channels.

[0004] A sealing gasket for electrolytic cells is needed to solve the above problems. Utility Model Content

[0005] This invention addresses the problem that PTFE sealing gaskets in the prior art have poor elasticity and compressibility, tend to flow under high loads, and may even rupture, leading to weakened sealing performance and safety hazards. It provides a sealing gasket for electrolytic cells that reduces gasket deformation and slows down aging through a stress-relieving structure, thus solving the aforementioned problems.

[0006] This utility model provides a sealing gasket for an electrolytic cell, including a gasket, an opening, several flow channel holes, several positioning holes, and several stress relief grooves. The gasket is a soft sheet structure, with the opening located at the center of the gasket. The flow channel holes, positioning holes, and stress relief grooves are located on the outer periphery of the opening. The positioning holes are arranged in groups of three on a ring body. At least one midline of the triangle formed by connecting the midpoints of the positioning holes in the same group passes through the center of the ring body. The flow channel holes are evenly distributed on the gasket and are provided with a flexible and stable structure for stabilizing the flow channel. The stress relief grooves are evenly distributed on the sealing gasket and are grooves with the same shape and size as the flow channel holes.

[0007] In a preferred embodiment of the sealing gasket for an electrolytic cell described in this utility model, the flow channel hole includes a flow channel opening, a bevel, and a reverse groove. The flow channel opening is an elongated hole. The bevel is located on the surface of one side of the gasket around the outer circumference of the flow channel opening. The bevel surface intersects with the gasket plane at the location of the flow channel opening. The reverse groove is located at the intersection of the top of the bevel and the gasket surface.

[0008] In a preferred embodiment of the sealing gasket for an electrolytic cell described in this utility model, the flow channel hole further includes a rigid skeleton. The rigid skeleton is a rigid annular sheet structure. The rigid skeleton is disposed inside the gasket on the outer periphery of the flow channel opening. The rigid skeleton is parallel to the upper and lower surfaces of the gasket. The inner and outer rings of the rigid skeleton are the same shape as the flow channel opening.

[0009] In a preferred embodiment of the sealing gasket for an electrolytic cell described in this utility model, the gasket surface where the stress relief groove is located and the gasket surface where the reverse groove is located are two opposing plate surfaces.

[0010] In the preferred embodiment of the sealing gasket for an electrolytic cell described in this utility model, the gasket is made of rubber.

[0011] The beneficial effects of this utility model are as follows:

[0012] (1) This device uses a stress relief groove structure to release the stress caused by the directional deformation of the sealing gasket after installation, thus avoiding damage to the sealing gasket;

[0013] (2) This device sets grooves and bevels at the flow channel connection position, which reduces the contact deformation caused by the flow channel, reduces the stress deformation of the overall ring structure, and further extends the life of the sealing gasket. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a sealing gasket for an electrolytic cell;

[0015] Figure 2 This is a schematic diagram of the flow channel hole of a sealing gasket for an electrolytic cell.

[0016] Figure label:

[0017] 1. Gasket; 2. Opening; 3. Flow channel hole; 31. Flow channel opening; 32. Bevel angle; 33. Reverse groove; 4. Positioning hole; 5. Stress relief groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example 1

[0020] like Figure 1 As shown, a sealing gasket for an electrolytic cell includes a gasket 1, an opening 2, several flow channel holes 3, several positioning holes 4, and several stress relief grooves 5. The gasket 1 is a soft sheet structure. The opening 2 is located at the center of the gasket 1. The flow channel holes 3, positioning holes 4, and stress relief grooves 5 are located on the outer periphery of the opening 2. The positioning holes 4 are arranged in groups of three on a ring. At least one midline of the triangle formed by connecting the midpoints of the positioning holes 4 in the same group passes through the center of the ring. The flow channel holes 3 are evenly arranged on the gasket 1. The flow channel holes 3 are provided with a flexible and stable structure for stabilizing the flow channel. The stress relief grooves 5 are evenly arranged on the sealing gasket 1. The stress relief grooves 5 are grooves with the same shape and size as the flow channel holes 3.

[0021] like Figure 2 As shown, the flow channel hole 3 includes a flow channel opening 31, a slope angle 32, and a reverse groove 33. The flow channel opening 2 is an elongated hole. The slope angle 32 is set on the plate surface of one side of the gasket 1 around the outer circumference of the flow channel opening 31. The slope surface of the slope angle 32 intersects with the plane of the gasket 1 at the position of the flow channel opening 31. The reverse groove 33 is set at the intersection line between the top of the slope angle 32 and the plate surface of the gasket 1.

[0022] The flow channel hole 3 also includes a rigid skeleton, which is a rigid annular sheet structure. The rigid skeleton is set in the gasket 1 on the outer periphery of the flow channel opening 2. The rigid skeleton is parallel to the upper and lower surfaces of the gasket 1. The inner and outer rings of the rigid skeleton are the same as the flow channel opening 31.

[0023] The surface of the gasket 1 where the stress relief groove 5 is located and the surface of the gasket 1 where the reverse groove 33 is located are two opposite plate surfaces.

[0024] Gasket 1 is made of rubber.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sealing gasket for an electrolytic cell, characterized in that: The device includes a gasket (1), an opening (2), several flow channel holes (3), several positioning holes (4), and several stress relief grooves (5). The gasket (1) is a soft sheet structure. The opening (2) is located at the center of the gasket (1). The flow channel holes (3), the positioning holes (4), and the stress relief grooves (5) are located on the outer periphery of the opening (2). The positioning holes (4) are arranged in groups of three on the ring body. At least one midline of the triangle formed by connecting the midpoints of the positioning holes (4) in the same group passes through the center of the ring body. The flow channel holes (3) are evenly arranged on the gasket (1). The flow channel holes (3) are provided with a flexible and stable structure for stabilizing the flow channel. The stress relief grooves (5) are evenly arranged on the gasket (1). The stress relief grooves (5) are grooves with the same shape and size as the flow channel holes (3).

2. The sealing gasket for an electrolytic cell according to claim 1, characterized in that: The flow channel hole (3) includes a flow channel opening (31), a slope (32), and a reverse groove (33). The opening (2) is an elongated hole. The slope (32) is located on one side of the outer circumference of the flow channel opening (31) on the plate surface of the gasket (1). The slope surface of the slope (32) intersects with the plane of the gasket (1) at the position of the flow channel opening (31). The reverse groove (33) is located at the intersection of the top of the slope (32) and the plate surface of the gasket (1).

3. A sealing gasket for an electrolytic cell according to claim 2, characterized in that: The flow channel hole (3) also includes a rigid skeleton, which is a rigid annular sheet structure. The rigid skeleton is disposed in the gasket (1) on the outer periphery of the opening (2). The rigid skeleton is parallel to the upper and lower surfaces of the gasket (1). The inner and outer rings of the rigid skeleton are the same as the flow channel opening (31).

4. A sealing gasket for an electrolytic cell according to claim 2, characterized in that: The surface of the gasket (1) where the stress relief groove (5) is located and the surface of the gasket (1) where the reverse groove (33) is located are two opposite plate surfaces.

5. A sealing gasket for an electrolytic cell according to claim 1, characterized in that: The gasket (1) is made of rubber.

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