Sealing assembly for alkaline electrolytic cell

Abstract

The utility model discloses a sealing assembly for an alkaline electrolytic bath. Comprising a negative end pressing plate, an annular sealing gasket and an end polar plate which are sequentially arranged, the negative end pressing plate sequentially comprises a first main body, an annular first concave surface and a third area used for later assembly from inside to outside, and one surface, close to the sealing gasket, of the first concave surface is concave inwards; the end pole plate comprises a second main body and an annular first convex surface, one surface, close to the sealing gasket, of the first convex surface protrudes outwards, and a plurality of first runner holes and second runner holes for alkali liquor and gas to circulate are respectively formed in the first concave surface and the first convex surface. The sealing assembly for the alkaline electrolytic bath provided by the utility model can achieve the effects of being good in sealing performance, reducing alkali liquor leakage and preventing a flow channel from being blocked. The distance between the face, close to the sealing gasket, of the second flow channel hole and the sealing gasket is smaller than that between the first convex face, and the first concave face, the sealing gasket and the first convex face form a sealing area for alkali liquor and gas to circulate.

Description

Technical Field

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

[0002] The existing sealing method between the end plate and the end electrode plate in water electrolysis hydrogen production is mainly an external sealing line with a planar sealing line. While this sealing method can meet the sealing requirements to a certain extent, it has significant drawbacks. First, the planar sealing line is easily affected by external factors such as temperature and pressure, leading to a decrease in sealing performance. Second, because the sealing gasket is more prone to deformation / creep at high temperatures, it can simultaneously exert pressure inward or outward relative to the center, thereby blocking the flow channels of hydrogen, oxygen, and alkali solution, and causing alkali solution leakage, which affects the normal operation of the equipment. Summary of the Invention

[0003] Purpose of the utility model: The purpose of this utility model is to provide a sealing component for an alkaline electrolytic cell that has good sealing performance, reduces alkali leakage, and prevents flow channel blockage.

[0004] Technical solution: The sealing assembly for the alkaline electrolytic cell of this utility model includes a negative end pressure plate, an annular sealing gasket, and an end plate arranged in sequence. The negative end pressure plate consists of a first main body, an annular first concave surface, and a third region for subsequent assembly, arranged from the inside to the outside. The side of the first concave surface near the sealing gasket is recessed inward. The end plate includes a second main body and an annular first convex surface. The side of the first convex surface near the sealing gasket protrudes outward. The first concave surface and the first convex surface are respectively provided with a plurality of first flow channel holes and second flow channel holes for the flow of alkali solution and gas.

[0005] Preferably, the second flow channel hole is closer to the sealing gasket than the first convex surface, and the first concave surface, the sealing gasket, and the first convex surface form a sealed area for the flow of alkali solution and gas.

[0006] Preferably, the shape of the sealing gasket matches the first concave surface and the first convex surface.

[0007] Preferably, the sealing gasket is made of one of silicone, polytetrafluoroethylene, or fluororubber.

[0008] The sealing assembly for an alkaline electrolytic cell of this utility model includes a negative end pressure plate, an annular sealing gasket, and an end plate arranged in sequence. The negative end pressure plate consists of a first main body, an annular second convex surface, and a third region for later assembly, arranged from the inside out. The side of the second convex surface near the sealing gasket protrudes outward. The end plate includes a second main body and an annular second concave surface. The side of the second concave surface near the sealing gasket is recessed inward. The second convex surface and the second concave surface are respectively provided with a plurality of first flow channel holes and second flow channel holes for the flow of alkali solution and gas.

[0009] Preferably, the first flow channel hole is closer to the sealing gasket than the second convex surface, and the second convex surface, the sealing gasket, and the second concave surface form a sealed area for the flow of alkali solution and gas.

[0010] Preferably, the shape of the sealing gasket matches the second convex surface and the second concave surface.

[0011] Preferably, the sealing gasket is made of one of silicone, polytetrafluoroethylene, or fluororubber.

[0012] Beneficial effects: Compared with the prior art, this utility model has the following advantages: (1) By improving the sealing method, it effectively solves the problems of insufficient sealing performance, easy leakage and blockage in the prior art, and improves the operating efficiency and safety of the equipment; (2) The sealing assembly can form a tighter sealing surface through the cooperation of the annular convex surface and the annular concave surface. Compared with the traditional planar sealing line, the tongue and groove surface seal has better sealing performance and stability, and effectively prevents the leakage of gas and liquid; (3) In this sealing assembly, the sealing gasket is restricted to the tongue and groove surface sealing area formed by the annular concave surface and the annular convex surface. Due to the constraint of the annular convex surface and the annular concave surface, the sealing gasket is not easy to be squeezed inward or outward relative to the center at high temperature, reducing deformation and thus reducing the risk of blocking the flow channel; (4) In this sealing assembly, the thickness of the flow channel hole on the annular convex surface is greater than the thickness of the annular convex surface, which further effectively prevents the leakage of gas and liquid and prevents the sealing gasket from being squeezed and blocking the flow channel hole. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall appearance of Example 1;

[0014] Figure 2 This is a schematic diagram of the terminal plate;

[0015] Figure 3 Schematic diagram of the negative end pressure plate;

[0016] Figure 4 This is a schematic diagram of a sealing gasket;

[0017] Figure 5 This is a partial enlarged view of the concave surface structure of the negative end pressure plate in Example 1;

[0018] Figure 6 This is a partial enlarged view of the convex structure in the end plate of Example 1;

[0019] Figure 7 This is a schematic diagram of the overall appearance of Example 2. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the embodiments.

[0021] Example 1

[0022] like Figure 1-6 As shown, the sealing assembly for the alkaline electrolytic cell of this utility model includes a negative end pressure plate 1, an annular sealing gasket 2, and an end plate 3 arranged sequentially. The negative end pressure plate 1 consists of a first body 11, an annular first concave surface 12, and a third region 13 for later assembly, arranged from the inside to the outside. The first concave surface 12 has a plurality of first flow channel holes 121 for the flow of alkali and gas. The side of the first concave surface 12 near the sealing gasket 2 is recessed inward. The end plate 3 includes a second body 31 and an annular first convex surface 32. The side of the first convex surface 32 near the sealing gasket 2 protrudes outward. The first convex surface 32 has a plurality of second flow channel holes 321 for the flow of alkali and gas.

[0023] The side of the second flow channel hole 321 closest to the sealing gasket 2 is closer to the sealing gasket 2 than the first convex surface 32. The first concave surface 12, the sealing gasket 2 and the first convex surface 32 form a sealing area for the flow of alkaline solution and gas, so as to further improve the sealing performance and prevent the sealing gasket from being squeezed and deformed, and prevent the flow channel hole from being blocked.

[0024] The shape of the sealing gasket 2 matches the first concave surface 12 and the first convex surface 32 to ensure a tight seal.

[0025] The sealing gasket 2 is made of highly elastic, high-temperature resistant, and corrosion-resistant materials, such as silicone, polytetrafluoroethylene, or fluororubber.

[0026] In use, place the sealing gasket between the negative end pressure plate and the end plate, ensuring the annular sealing gasket is positioned within the tongue and groove sealing area formed by the annular concave and convex surfaces, allowing for a tight fit. For example... Figure 3 As shown, N5, N6, N7, and N8 are alkali inlets, N1 and N2 are hydrogen outlets, and N3 and N4 are oxygen outlets. In the electrolytic cell equipped with this sealing assembly, during operation, the alkali solution enters the sealed area formed by the annular concave and convex surfaces from the alkali inlet below the negative end pressure plate. After the reaction, the generated hydrogen and oxygen are discharged through the hydrogen outlet and oxygen outlet above the negative end pressure plate, respectively. Due to the constraint of the annular convex and concave surfaces, the sealing gasket is less prone to inward or outward compression relative to the center at high temperatures, reducing deformation and thus reducing the risk of clogging the flow channel. This sealing assembly, through the cooperation of the annular convex and concave surfaces, can form a tighter sealing surface. Compared with traditional planar sealing lines, the tongue and groove surface seal has better sealing performance and stability, effectively preventing gas and liquid leakage.

[0027] Example 2

[0028] like Figure 7As shown, the sealing assembly for the alkaline electrolytic cell of this utility model includes a negative end pressure plate 1, an annular sealing gasket 2, and an end plate 3 arranged sequentially. The negative end pressure plate 1 consists of a first body 11, an annular second convex surface 15, and a third region 13 for later assembly, arranged from the inside to the outside. The second convex surface 15 has a plurality of first flow channel holes 121 for the flow of alkali and gas, and the side of the second convex surface 15 near the sealing gasket 2 protrudes outward. The end plate 3 includes a second body 31 and an annular second concave surface 35, the side of the second concave surface 35 near the sealing gasket 2 is recessed inward, and the second concave surface 35 has a plurality of second flow channel holes 321 for the flow of alkali and gas.

[0029] The side of the first flow channel hole 121 closest to the sealing gasket 2 is closer to the sealing gasket 2 than the second convex surface 15. The second convex surface 15, the sealing gasket 2, and the second concave surface 35 form a sealing area for the flow of alkaline solution and gas, so as to further improve the sealing performance and prevent the sealing gasket from being squeezed and deformed, and prevent the flow channel hole from being blocked.

[0030] The shape of the sealing gasket 2 matches the second convex surface 15 and the second concave surface 35 to ensure a tight seal.

Claims

1. A sealing assembly for an alkaline electrolyzer comprising, in succession, a negative end plate (1), an annular sealing gasket (2) and an end pole plate (3), characterized in that, The negative end pressing plate (1) is sequentially provided with a first body (11), an annular first concave surface (12) and a third area (13) for later assembly from inside to outside, and the first concave surface (12) is inwardly recessed on the side close to the sealing gasket (2); the end pole plate (3) comprises a second body (31) and an annular first convex surface (32), and the first convex surface (32) is outwardly convex on the side close to the sealing gasket (2), and the first concave surface (12) and the first convex surface (32) are respectively provided with a plurality of first flow channel holes (121) and second flow channel holes (321) for the flow of alkali liquor and gas.

2. The seal assembly for an alkaline electrolyzer of claim 1, wherein, The second flow channel hole (321) is closer to the sealing gasket (2) on the side close to the sealing gasket (2) than the first convex surface (32), and the first concave surface (12), the sealing gasket (2) and the first convex surface (32) form a sealing area for the flow of alkali liquor and gas.

3. The seal assembly for an alkaline electrolyzer of claim 1, wherein, The sealing gasket (2) is matched in shape with the first concave surface (12) and the first convex surface (32).

4. The seal assembly for an alkaline electrolyzer of claim 1, wherein, The sealing gasket (2) is made of one of silicone, polytetrafluoroethylene and fluororubber.

5. A sealing assembly for an alkaline electrolyzer comprising, in succession, a negative end plate (1), an annular sealing gasket (2) and an end pole plate (3), characterized in that, The negative end pressing plate (1) is sequentially provided with a first body (11), an annular second convex surface (15) and a third area (13) for later assembly from inside to outside, and the second convex surface (15) is outwardly convex on the side close to the sealing gasket (2); the end pole plate (3) comprises a second body (31) and an annular second concave surface (35), and the second concave surface (35) is inwardly recessed on the side close to the sealing gasket (2), and the second convex surface (15) and the second concave surface (35) are respectively provided with a plurality of first flow channel holes (121) and second flow channel holes (321) for the flow of alkali liquor and gas.

6. The seal assembly for an alkaline electrolyzer of claim 5, wherein, The first flow channel hole (121) is closer to the sealing gasket (2) on the side close to the sealing gasket (2) than the second convex surface (15), and the second convex surface (15), the sealing gasket (2) and the second concave surface (35) form a sealing area for the flow of alkali liquor and gas.

7. The seal assembly for an alkaline electrolyzer of claim 5, wherein, The sealing gasket (2) is matched in shape with the second convex surface (15) and the second concave surface (35).

8. The seal assembly for an alkaline electrolyzer of claim 5, wherein, The sealing gasket (2) is made of one of silicone, polytetrafluoroethylene and fluororubber.

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