Sealing structure of alkaline water electrolytic bath

Abstract

The invention provides a sealing structure of an alkaline water electrolytic bath, which comprises an end pressing plate, a pole plate, a sealing gasket, a draw-in bolt and a nut, the outer side of the pole plate is a zigzag concave structure with a concave section, the sealing gasket is provided with a convex structure, the convex structure of the sealing gasket corresponds to the concave structure of the pole plate, the end pressing plate is a solid circular plate, and the draw-in bolt is arranged on the end pressing plate. The sealing gasket is in the shape of a circular ring and is attached to the polar plate on the outer side of the polar plate through an inward concave structure and a protruding structure, the tensioning bolt is matched with the nut, each small chamber formed by the polar plate and the sealing gasket is extruded and tensioned through the two end pressing plates, a traditional gasket form is adopted for an existing sealing gasket of the alkaline electrolytic cell, the surface of the gasket is smooth, and the sealing gasket is not prone to deformation. In the manufacturing and operating process of electrolytic bath equipment, the sealing performance is reduced, and the phenomenon of liquid leakage of the bath body is likely to occur, so that the liquid leakage phenomenon of the electrolytic bath in the assembling and operating process can be solved, and the phenomenon of short circuit or discharge of the electrolytic bath caused by liquid leakage of the bath body is avoided.

Description

Technical Field

[0001] The invention relates to the field of alkaline water electrolysis hydrogen production equipment, and in particular to a sealing structure of an alkaline water electrolyzer. Background Art

[0002] With the development of the hydrogen energy industry in recent years, the country has identified the hydrogen energy industry as a national strategic emerging industry to promote the national 30.60 strategy and the transformation of the national energy structure.

[0003] In the hydrogen production industry, there are currently four hydrogen production routes: alkaline water electrolysis, proton exchange membrane water electrolysis, anion exchange membrane, and solid oxide water electrolysis. Alkaline water electrolysis is widely used due to its low cost and relatively mature technology.

[0004] Alkaline water electrolysis hydrogen production equipment mainly includes alkaline water electrolyzer, gas-liquid separation device, purification and drying device, hydrogen production power supply, control system, etc. At present, the industry application is mainly based on 1000Nm3 / h alkaline water electrolyzer. The core components mainly include plates, diaphragms, sealing gaskets, electrodes, etc. The various small chambers composed of electrodes and sealing gaskets are squeezed and tightened by the cooperation of fasteners such as tightening bolts and nuts.

[0005] During the application of the alkaline water electrolyzer, the sealing gasket and the electrode plate do not fit properly, resulting in leakage in the alkaline water electrolyzer, causing short circuit, discharge, and corrosion in the alkaline water electrolyzer, posing a safety hazard. Summary of the invention

[0006] The purpose of the present invention is to solve the sealing problem of an alkaline water electrolytic cell and enhance the sealing performance of a sealing gasket, so as to solve the defects of the current electrolytic cell such as leakage of the electrolytic cell caused by poor sealing performance.

[0007] To achieve the above-mentioned purpose, the present invention provides a sealing structure of an alkaline water electrolyzer, comprising an end pressure plate, a pole plate, a sealing gasket, a tightening bolt and a nut, wherein the outer side of the pole plate is a sawtooth-shaped concave structure with a concave cross-section, and the sealing gasket is provided with a convex structure, and the convex structure of the sealing gasket corresponds to the concave structure of the pole plate, the end pressure plate is a solid circular plate, and the pole plate is a solid circular ring, the sealing gasket is in the shape of a circular ring and fits with the pole plate on the outer side of the pole plate through the concave structure and the convex structure, and the tightening bolt cooperates with the nut and squeezes and tightens each small chamber composed of the pole plate and the sealing gasket through the two end pressure plates.

[0008] Furthermore, the electrode plate is made of Q235B.

[0009] Furthermore, the sealing gasket is made of modified polytetrafluoroethylene.

[0010] Furthermore, the protruding structure of the sealing gasket is in an arc shape and is sealed and fitted with the concave structure of the sealing water line of the electrode plate to prevent leakage.

[0011] Furthermore, the arc radius of the protruding structure of the sealing gasket is 0.7 mm.

[0012] Furthermore, the thickness of the electrode plate is 10 mm.

[0013] Furthermore, the curvature of the protruding structure is 45 degrees.

[0014] At present, the sealing gasket of the alkaline electrolytic cell adopts the traditional gasket form with a smooth surface. During the manufacturing and operation of the electrolytic cell equipment, the sealing performance is reduced, and the cell body is prone to leakage. Through the innovation of new structures, the leakage problem of the electrolytic cell during assembly and operation can be solved, and the short circuit or discharge of the electrolytic cell caused by cell body leakage can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the left view of the electrolytic cell plate and sealing gasket installation structure;

[0016] Figure 2 It is the AA cross-sectional view of the electrolytic cell plate and sealing gasket installation structure;

[0017] Figure 3 for Figure 1 The structural diagram of the sealing gasket in the AA section diagram;

[0018] Figure 4 for Figure 1 The schematic diagram of the structure of the outer side of the plate in the AA cross-section;

[0019] Figure 5 for Figure 1 Structural schematic diagram of the sealing structure installation in the AA section diagram.

[0020] In the figure: 1-tightening bolt; 2-nut; 3-sealing gasket; 4-electrode plate; 5-end pressure plate.

[0021] Specific implementation method

[0022] A new structure of an electrolytic cell sealing gasket is provided, through which the new structure of the sealing gasket 3 is more compatible with the sealing water line of the electrolytic cell plate 4. Through innovative research and development of the sealing gasket 3 structure, a new protruding structure is set on the sealing gasket 3, and the protruding structure is matched with the concave structure of the sealing water line of the plate, thereby increasing the sealing performance of the electrolytic cell and solving the leakage problem.

[0023] The present invention provides a sealing structure of an alkaline water electrolyzer, comprising an end pressure plate 5, a pole plate 4, a sealing gasket 3, a tensioning bolt 1 and a nut 2. The outer side of the pole plate 4 is a sawtooth-shaped concave structure with a concave cross section, and the material is Q235B. The thickness of the pole plate is 10 mm. The sealing gasket 3 is provided with a convex structure, and the material of the sealing gasket 3 is modified polytetrafluoroethylene. The convex structure of the sealing gasket 3 corresponds to the concave structure of the pole plate 4. The end pressure plate 5 is a solid circular plate, and the pole plate 4 is a solid circular ring. The sealing gasket 3 is in the shape of a circular ring and is mutually fitted with the pole plate 4 on the outer side of the pole plate through the concave structure and the convex structure. The tensioning bolt 1 cooperates with the nut 2 and squeezes and tightens each small chamber composed of the pole plate 4 and the sealing gasket 3 through two end pressure plates 5.

[0024] The protruding structure of the sealing gasket 3 is in an arc shape and is sealed and fitted with the concave structure of the sealing water line of the electrode plate 4 to prevent leakage. The arc radius of the protruding structure of the sealing gasket 3 is 0.7 mm, and the curvature of the protruding structure is 45 degrees.

[0025] The installation process is to install the end pressure plate 5, the sealing gasket 3, the pole plate 4, the sealing gasket 3, and the other side end pressure plate 5, and fix the two end pressure plates 5 by tightening the bolts 1 and the nuts 2. After the pole plate 4 and the sealing gasket 3 are subjected to the pressure of the end pressure plate 5, the convex structure of the sealing gasket 3 is squeezed into the groove of the concave structure of the pole plate to achieve a sealing effect.

Claims

1. A sealing structure for an alkaline water electrolyzer, characterized in that: It includes an end pressure plate, a pole plate, a sealing gasket, a tightening bolt and a nut. The outer side of the pole plate is a sawtooth-shaped concave structure with a concave cross-section. The sealing gasket is provided with a convex structure. The convex structure of the sealing gasket corresponds to the concave structure of the pole plate. The end pressure plate is a solid circular plate, and the pole plate is a solid circular ring. The sealing gasket is in the shape of a circular ring and fits with the pole plate on the outer side of the pole plate through the concave structure and the convex structure. The tightening bolt cooperates with the nut and squeezes and tightens each small chamber composed of the pole plate and the sealing gasket through the two end pressure plates.

2. The sealing structure of an alkaline water electrolyzer according to claim 1, characterized in that: The plate material is Q235B.

3. The sealing structure of an alkaline water electrolyzer according to claim 1, characterized in that: The sealing gasket is made of modified polytetrafluoroethylene.

4. The sealing structure of an alkaline water electrolyzer according to claim 1, characterized in that: The protruding structure of the sealing gasket is in an arc shape and is sealed and fitted with the concave structure of the sealing water line of the electrode plate to prevent liquid leakage.

5. The sealing structure of an alkaline water electrolyzer according to claim 1, characterized in that: The arc radius of the protruding structure of the sealing gasket is 0.7 mm.

6. The sealing structure of an alkaline water electrolyzer according to claim 1, characterized in that: The thickness of the electrode plate is 10 mm.

7. The sealing structure of an alkaline water electrolyzer according to claim 1, characterized in that: The curvature of the protruding structure is 45 degrees.

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