Alkaline electrolytic cell sealing structure

Abstract

The invention relates to the technical field of electrolytic cells, and particularly discloses an alkaline electrolytic cell sealing structure which comprises a sealing gasket, a diaphragm and a pole frame, a bipolar plate is arranged in the pole frame, the sealing gasket is in a circular ring shape, an annular boss is coaxially arranged on one end face of the sealing gasket, and the diaphragm is arranged on the other end face of the sealing gasket. A containing groove matched with the diaphragm in size is formed in the end face of the boss, an embedding groove matched with the boss in size is formed in one end face of each pole frame, the sealing gasket and the pole frames are arranged in a staggered mode, and the sealing gasket is clamped between the two pole frames. The end face, provided with the boss, of the sealing gasket is opposite to the end face, provided with the caulking groove, of the pole frame, the boss is arranged in the caulking groove, and the diaphragm is arranged in the containing groove. According to the sealing gasket structure, the sealing performance of the sealing gasket can be effectively improved, and the using amount of the sealing gasket is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolyzers, and particularly to a sealing structure for an alkaline electrolyzer. Background Art

[0002] Each two bipolar plates of a bipolar electrolyzer form a small chamber, and a diaphragm needs to be installed in the middle of the small chamber. To ensure the sealing performance of the electrolyzer, a sealing gasket needs to be clamped between the diaphragm and the electrode frame of the bipolar plate. Since a sealing gasket is clamped between each diaphragm and the electrode frames on both sides thereof, this results in a large amount of sealing gaskets being used, increasing the assembly difficulty. And the sealing gasket is generally made of a plastic material with a certain elasticity, and creep will occur after being strongly extruded, and the creep seeps outwards, resulting in a change in the original contact part between the diaphragm and the sealing gasket, which will have a great impact on the sealing performance of the sealing gasket. Summary of the Invention

[0003] To solve the problems mentioned in the background art, the purpose of the present invention is to provide a sealing structure for an alkaline electrolyzer.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] A sealing structure for an alkaline electrolyzer, including a sealing gasket, a diaphragm, and an electrode frame. A bipolar plate is arranged inside the electrode frame. The sealing gasket is in a circular ring shape. A ring-shaped boss is coaxially arranged on one end surface of the sealing gasket. A receiving groove matching the diaphragm in size is opened on the end surface of the boss. An embedding groove matching the boss in size is opened on one end surface of the electrode frame. When installing the alkaline electrolyzer, the sealing gaskets and the electrode frames are arranged alternately, the sealing gaskets are clamped between two electrode frames, the end surface of the sealing gasket provided with the boss is arranged opposite to the end surface of the electrode frame provided with the embedding groove, the boss is arranged inside the embedding groove, and the diaphragm is arranged inside the receiving groove.

[0006] Further, the boss and the sealing gasket are integrally formed.

[0007] Further, the inner peripheral surface of the boss is coplanar with the inner peripheral surface of the sealing gasket.

[0008] Further, the sealing gasket is made of fluoroplastics.

[0009] Further, the fluoroplastics is polytetrafluoroethylene.

[0010] The beneficial effects of the present invention are as follows: After two pole frames clamp a sealing gasket in the middle, the boss on the sealing gasket is extruded and undergoes creep, so that the outer peripheral surface of the boss abuts against the circumferential surface of the groove, forming an effective seal. Even if there are slight changes in the contact position between the diaphragm and the sealing gasket, it will not affect the sealing performance of the sealing gasket; the boss can play a limiting role to prevent large deformations of the sealing gasket itself; the diaphragm is restricted in the receiving groove, so that a sealing gasket cooperating with the pole frame can clamp the diaphragm, and the amount of the sealing gasket used is halved, which not only reduces the production cost, but also reduces the assembly difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0012] Description of the drawing reference numerals: 1, sealing gasket; 11, boss; 111, receiving groove; 2, diaphragm; 3, pole frame; 31, bipolar plate; 32, groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0013] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the protection scope of the present invention.

[0014] Embodiment

[0015] As Figure 1 shown, an alkaline electrolyzer sealing structure includes a sealing gasket 1, a diaphragm 2, and a pole frame 3. A bipolar plate 31 is arranged in the pole frame 3. The sealing gasket 1 is made of polytetrafluoroethylene. The sealing gasket 1 is in a circular ring shape. A ring-shaped boss 11 is integrally formed on one end surface of the sealing gasket 1. The inner peripheral surface of the boss 11 is coplanar with the inner peripheral surface of the sealing gasket 1. The diaphragm 2 is circular. A receiving groove 111 matching the size of the diaphragm 2 is formed on the end surface of the boss 11. The outer diameter of the receiving groove 111 is smaller than the outer diameter of the boss 11. A groove 32 matching the size of the boss 11 is formed on one end surface of the pole frame 3. When installing the alkaline electrolyzer, a plurality of sealing gaskets 1 and pole frames 3 are arranged alternately. The sealing gasket 1 is clamped between two pole frames 3. The end surface of the sealing gasket 1 provided with the boss 11 is arranged opposite to the end surface of the pole frame 3 provided with the groove 32. The boss 11 is embedded in the groove 32. The diaphragm 2 is arranged in the receiving groove 111.

[0016] After two pole frames 3 clamp a sealing gasket 1 in the middle, the boss 11 on the sealing gasket 1 is extruded and undergoes creep, so that the outer peripheral surface of the boss 11 abuts against the circumferential surface of the groove 32, forming an effective seal. Even if the contact position between the diaphragm 2 and the sealing gasket 1 changes slightly, it will not affect the sealing performance of the sealing gasket 1; the boss 11 can play a limiting role to prevent the sealing gasket 1 itself from deforming greatly; the diaphragm 2 is restricted in the accommodation groove 111, so that a sealing gasket 1 cooperating with the pole frame 3 can clamp the diaphragm 2.

[0017] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An alkaline electrolytic cell sealing structure, comprising a sealing gasket (1), a diaphragm (2) and an electrode frame (3), wherein a bipolar plate (31) is arranged in the electrode frame (3), characterized in that: The sealing gasket (1) is in the shape of a circular ring. An annular boss (11) is coaxially arranged on one end face of the sealing gasket (1). A receiving groove (111) whose size matches that of the diaphragm (2) is provided on the end face of the boss (11). An embedding groove (32) whose size matches that of the boss (11) is provided on one end face of the pole frame (3). When the alkaline electrolytic cell is installed, the sealing gasket (1) and the pole frame (3) are arranged alternately. The sealing gasket (1) is clamped between the two pole frames (3). The end face of the sealing gasket (1) provided with the boss (11) and the end face of the pole frame (3) provided with the embedding groove (32) are arranged opposite to each other. The boss (11) is arranged in the embedding groove (32), and the diaphragm (2) is arranged in the receiving groove (111).

2. The sealing structure of the alkaline electrolytic cell according to claim 1, characterized in that: The boss (11) and the sealing gasket (1) are integrally formed.

3. The alkaline electrolytic cell sealing structure according to claim 1, characterized in that: The inner circumferential surface of the boss (11) is coplanar with the inner circumferential surface of the sealing gasket (1).

4. The sealing structure of the alkaline electrolytic cell according to claim 1, characterized in that: The sealing gasket (1) is made of fluoroplastic.

5. The sealing structure of the alkaline electrolytic cell according to claim 4, characterized in that: The fluoroplastic is polytetrafluoroethylene.

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