Electrolytic tank for producing hydrogen by electrolyzing water

Abstract

The electrolytic tank comprises a front sealing frame and a rear sealing frame which are buckled with each other, the rear end of the front sealing frame is provided with an opening, the front sealing frame is integrally in a rectangular shell shape, the four corners of the front sealing frame are chamfered, and the chamfered positions of the four corners of the front sealing frame extend outwards to form front connecting arms; a front oblong hole is formed in the front connecting arm; an opening is formed in the front end of the rear sealing frame, the rear sealing frame is integrally in a rectangular shell shape, the four corners of the rear sealing frame are chamfered, rear connecting arms are arranged at the chamfered positions of the four corners of the rear sealing frame in an outward extending mode, and rear long round holes are formed in the rear connecting arms; according to the utility model, the two integral parts, namely the front sealing frame and the rear sealing frame, are adopted to realize integral sealing, so that the sealing effect of the whole electrolytic cell can be ensured as long as the sealing effect between the front sealing frame and the rear sealing frame is ensured, the positions needing to be sealed are reduced, and the processing and assembling difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen production by electrolysis of water, in particular to an electrolytic cell for hydrogen production by electrolysis of water. Background Art

[0002] AEM is a new type of alkaline ion membrane water splitting hydrogen production technology, which mainly includes four parts: electrolyzer, electrodes, electrolyte and power supply. As the latest water electrolysis technology, AEM has great potential in combining the low cost of alkaline electrolyzer with the simplicity and high efficiency of PEM, and has great application prospects.

[0003] For example, the patent with authorization announcement number CN220788820U discloses a water electrolysis hydrogen production anti-reversal electrolyzer, comprising a top fixed end plate, a top insulating layer provided at the bottom of the top fixed end plate, an anode plate provided at the bottom of the top insulating layer, an oxygen-side ring gasket provided at the bottom of the anode plate, and an oxygen-side mesh gasket provided in the inner cavity of the oxygen-side ring gasket. By placing the electrolyzer reaction plane horizontally with the oxygen side facing upward, the oxygen bubbles generated by electrolysis are spherical, with a small contact area with the membrane electrode, and due to the buoyancy of water, the oxygen bubbles can detach from the membrane electrode more quickly, thereby...

[0004] The aforementioned patent effectively alleviates the existing problem of oxygen bubbles generated by electrolysis adhering to the membrane electrode and creeping upward, forming an excessively large reverse reaction zone. This innovation also rationally configures the oxygen-side diffusion layer to fully reduce the area and duration of the power generation effect, thereby increasing the effective working area and effective working time of the electrolytic cell, thereby achieving high operating efficiency and long life of the electrolytic cell.

[0005] However, the disadvantage of the above patent is that the electrolytic cell in the above patent is composed of an end plate in combination with a hydrogen side ring gasket, a membrane electrode, etc. During installation, all components need to be fixed with screws. The assembly requires high precision, and the pre-tightening force when fixing with screws is very large, which usually causes the components to deform.

[0006] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0007] The purpose of the present invention is to provide an electrolytic cell for producing hydrogen by electrolyzing water to solve the problems raised in the above background technology.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] The electrolytic cell for producing hydrogen by electrolysis of water comprises a front sealing frame and a rear sealing frame that are buckled with each other, wherein the rear end of the front sealing frame is open, wherein the front sealing frame is in the shape of a rectangular shell as a whole, wherein the four corners of the front sealing frame are chamfered, and the chamfers of the four corners of the front sealing frame are extended outwardly with a front connecting arm, and a front oblong hole is opened on the front connecting arm; the front end of the rear sealing frame is open, wherein the rear sealing frame is in the shape of a rectangular shell as a whole, wherein the four corners of the rear sealing frame are chamfered, and the chamfers of the four corners of the rear sealing frame are extended outwardly with a rear connecting arm, and a rear oblong hole is opened on the rear connecting arm; wherein the edge of the opening of the front sealing frame An inner snap-fit ​​frame is provided on the inner side of the edge, wherein an inner snap-fit ​​groove is provided on the inner side of the edge of the opening of the rear sealing frame, and the inner snap-fit ​​frame is located on the inner side of the inner snap-fit ​​groove, and the front connecting arm and the rear connecting arm are fixedly connected by a connecting assembly; the connecting assembly includes a connecting stud and a connecting nut; the connecting stud includes a hexagonal main body and threaded parts located at both ends of the main body, wherein the front and rear threaded parts of the connecting stud respectively pass through the front oblong hole on the front connecting arm and the rear oblong hole on the rear connecting arm; the front and rear threaded parts of the connecting stud are threadedly connected with a connecting nut, and the end of the connecting nut is provided with a knob for facilitating the rotation of the nut.

[0010] Furthermore, the height of the inner snap-fit ​​frame is greater than the depth of the inner snap-fit ​​groove.

[0011] Furthermore, a sealing gasket is provided between the inner snap-fit ​​frame and the inner snap-fit ​​groove.

[0012] Furthermore, a plurality of electrolytic cell unit assemblies are arranged between the front sealing frame and the rear sealing frame.

[0013] Furthermore, metal partitions are provided between adjacent electrolytic cell unit assemblies.

[0014] Furthermore, the electrolytic cell unit assembly includes a cathode electrode, an anode electrode, and a diaphragm located between the cathode electrode and the anode electrode.

[0015] Furthermore, a cathode frame is provided on the outer side of the cathode electrode, and an anode frame is provided on the outer side of the anode electrode.

[0016] Furthermore, the cathode frame and the anode frame are both made of plastic.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The front sealing frame and the rear sealing frame are used as two integral parts to achieve overall sealing. As long as the sealing effect between the front sealing frame and the rear sealing frame is guaranteed, the sealing effect of the entire electrolytic cell can be guaranteed. The number of positions that need to be sealed in the utility model is reduced, and the difficulty of processing and assembly is reduced. At the same time, the sealing between the front sealing frame and the rear seal is achieved by a sealing gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the electrolyzer for producing hydrogen by electrolyzing water.

[0020] Figure 2 This is a front view of the electrolyzer for producing hydrogen by electrolyzing water.

[0021] Figure 3 for Figure 2 Middle AA section view.

[0022] Figure 4 for Figure 3 A partial enlarged view of point a in the middle.

[0023] Figure 5 This is an exploded view of an electrolyzer for producing hydrogen by electrolyzing water. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents selected embodiments of the present invention. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-5 The electrolytic cell for producing hydrogen by electrolysis of water comprises a front sealing frame 1 and a rear sealing frame 2 which are fastened to each other.

[0026] The rear end of the front sealing frame 1 is open, wherein the front sealing frame 1 is in the shape of a rectangular shell as a whole, wherein the four corners of the front sealing frame 1 are chamfered, and the chamfered corners of the front sealing frame 1 are extended outward to form front connecting arms 101, and a front oblong hole 103 is formed on the front connecting arm 101;

[0027] The front end of the rear sealing frame 2 is open, and the rear sealing frame 2 is in the shape of a rectangular shell. The four corners of the rear sealing frame 2 are chamfered, and rear connecting arms 201 are extended outward from the chamfered corners of the rear sealing frame 2. A rear oblong hole 203 is opened on the rear connecting arm 201.

[0028] An inner snap-fitting frame 102 is provided on the inner side of the edge of the opening of the front sealing frame 1, and an inner snap-fitting groove 202 is provided on the inner side of the edge of the opening of the rear sealing frame 2. The inner snap-fitting frame 102 is located inside the inner snap-fitting groove 202, and the height of the inner snap-fitting frame 102 is greater than the depth of the inner snap-fitting groove 202. A sealing gasket 6 is also provided between the inner snap-fitting frame 102 and the inner snap-fitting groove 202.

[0029] The front connecting arm 101 and the rear connecting arm 201 are fixedly connected via a connecting assembly 3;

[0030] The connecting assembly 3 includes a connecting stud 301 and a connecting nut 302. The connecting stud 301 includes a hexagonal main body 304 and threaded portions 305 at both ends of the main body 304. The front and rear threaded portions 305 of the connecting stud 301 respectively pass through the front oblong hole 103 on the front connecting arm 101 and the rear oblong hole 203 on the rear connecting arm 201. The connecting nut 302 is threadedly connected to the front and rear threaded portions 305 of the connecting stud 301, and the end of the connecting nut 302 is provided with a knob 303 for facilitating the rotation of the nut.

[0031] In this solution, a plurality of electrolytic cell unit assemblies 4 are arranged between the front sealing frame 1 and the rear sealing frame 2, and a metal partition 5 is arranged between adjacent electrolytic cell unit assemblies 4; the electrolytic cell unit assemblies 4 include a cathode electrode 401, an anode electrode 402 and a diaphragm 403 located between the cathode electrode 401 and the anode electrode 402, wherein a cathode frame 404 is arranged on the outside of the cathode electrode 401, and an anode frame 405 is arranged on the outside of the anode electrode 402; the cathode frame 404 and the anode frame 405 are both made of plastic and are injection molded, which is simple to manufacture, has low production cost, improves production efficiency, and can reduce the overall weight of the electrolytic cell.

[0032] When assembling this solution, the electrolytic cell unit assembly 4 is assembled first, and then the electrolytic cell unit assembly 4 and the metal partition 5 are installed in the front sealing frame 1 and the rear sealing frame 2. Finally, the front sealing frame 1 and the rear sealing frame 2 are sealed by the connecting assembly 3; and there is water flowing between adjacent electrolytic cell unit assemblies, and the adjacent electrolytic cell unit assemblies themselves do not need to be strictly sealed.

[0033] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "left," "right," and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the product of the present invention is typically placed when in use, or the positions or locations commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific position, be constructed, or operate in a specific position. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. An electrolytic cell for producing hydrogen by electrolysis of water, comprising a front sealing frame and a rear sealing frame that are interlocked, characterized in that: The rear end of the front sealing frame is open, wherein the front sealing frame is in the shape of a rectangular shell as a whole, wherein the four corners of the front sealing frame are chamfered, and the chamfers of the four corners of the front sealing frame are extended outwardly with front connecting arms, and a front oblong hole is opened on the front connecting arm; the front end of the rear sealing frame is open, wherein the rear sealing frame is in the shape of a rectangular shell as a whole, wherein the four corners of the rear sealing frame are chamfered, and the chamfers of the four corners of the rear sealing frame are extended outwardly with rear connecting arms, and a rear oblong hole is opened on the rear connecting arm; an inner snap-fitting frame is provided on the inner side of the edge of the opening of the front sealing frame, which An inner snap-in groove is provided on the inner side of the edge of the opening of the middle and rear sealing frame, and the inner snap-in groove is located on the inner side of the inner snap-in groove. The front connecting arm and the rear connecting arm are fixedly connected by a connecting assembly; the connecting assembly includes a connecting stud and a connecting nut; the connecting stud includes a hexagonal main body and threaded parts located at both ends of the main body, wherein the front and rear threaded parts of the connecting stud pass through the front oblong hole on the front connecting arm and the rear oblong hole on the rear connecting arm respectively; the front and rear threaded parts of the connecting stud are threadedly connected with a connecting nut, and the end of the connecting nut is provided with a knob for facilitating the rotation of the nut.

2. The electrolytic cell for producing hydrogen from water by electrolysis according to claim 1, wherein: The height of the inner snap-fit ​​frame is greater than the depth of the inner snap-fit ​​groove.

3. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 1, wherein: A sealing gasket is further provided between the inner snap-fit ​​frame and the inner snap-fit ​​groove.

4. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 1, wherein: A plurality of electrolytic cell unit components are arranged between the front sealing frame and the rear sealing frame.

5. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 4, characterized in that: Metal partitions are provided between adjacent electrolytic cell unit assemblies.

6. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 4, characterized in that: The electrolytic cell unit assembly includes a cathode electrode, an anode electrode, and a separator located between the cathode electrode and the anode electrode.

7. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 6, wherein: A cathode frame is provided on the outer side of the cathode electrode, and an anode frame is provided on the outer side of the anode electrode.

8. The electrolytic cell for producing hydrogen by electrolysis of water according to claim 7, characterized in that: The cathode pole frame and the anode pole frame are both made of plastic.

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