Integrated electrolytic bath medium inlet and outlet structure

Abstract

The utility model relates to an integrated electrolytic bath medium inlet and outlet structure, and belongs to the field of electrolytic hydrogen production electrolytic baths, the integrated electrolytic bath medium inlet and outlet structure comprises a pole plate body, the circumferential side wall of the pole plate body is fixedly connected with a medium inlet and outlet structure, and the medium inlet and outlet structure is relatively communicated with a gas-liquid channel in the pole plate body; the medium inlet and outlet structure comprises an integrated connecting pipe, and the integrated connecting pipe is relatively and fixedly connected with an external connecting pipe. The method has the effects of reducing the leakage risk of the inlet and outlet of the electrolytic cell, prolonging the service life of the electrolytic cell and reducing economic loss caused by electrolytic cell leakage maintenance.

Description

Technical Field

[0001] The present application relates to the field of electrolytic hydrogen production electrolyzers, and in particular to an integrated electrolytic cell medium inlet and outlet structure. Background Art

[0002] As the core equipment of the water electrolysis hydrogen production industry, the electrolyzer is mainly made of several electrolysis chambers compressed together. By energizing the electrolyzer, the water in each chamber is electrolyzed into hydrogen and oxygen. Hydrogen and oxygen are collected along their respective channels and sent out through the electrolyzer medium inlet and outlet.

[0003] At present, the structures of the inlet and outlet of the electrolytic cell medium are mainly divided into two types:

[0004] (1) The inlet and outlet of the electrolytic cell medium are opened on the end pressure plate: the holes for the inlet and outlet of the medium are directly processed at the corresponding positions on the end pressure plate. This structure makes the end pressure plate, which plays a compressing role, directly contact with the highly corrosive alkali solution as the electrolyte. Therefore, the heavy end pressure plate has to be nickel-plated as a whole to prevent the end pressure plate from being corroded by the alkali solution and damaging the electrolytic cell. The medium inlet and outlet holes also need to be specially protected by embedding nickel tubes.

[0005] (2) The medium inlet and outlet of the electrolytic cell are opened on the end plate or the middle plate: the thickness of the plates at both ends or in the middle of the electrolytic cell is increased, and several medium inlet and outlet holes are opened on the top of the thick plate. The pipes of corresponding specifications are inserted into the holes for welding, and the flange is connected to the other side of the pipe. After processing, the whole is nickel-plated.

[0006] Regarding the above-mentioned related technologies, the inventors believe that when the medium inlet and outlet are located on the end pressure plate, the manufacturing links and costs of the end pressure plate are increased, and the surface coating of the end pressure plate is easily damaged when connecting the external connecting pipe; when the medium inlet and outlet are located on the end plate or the middle plate, the weld between the connecting pipe and the thick plate is saddle-shaped, which makes welding difficult, the microstructure of the weld surface is complex, the coating thickness is uneven, and there is a risk of corrosion. Utility Model Content

[0007] In order to reduce the risk of electrolytic cell medium inlet and outlet leakage, extend the service life of the electrolytic cell, and reduce the economic losses caused by electrolytic cell leakage repair, the present application provides an integrated electrolytic cell medium inlet and outlet structure.

[0008] The present application provides an integrated electrolytic cell medium inlet and outlet structure, which adopts the following technical solution:

[0009] An integrated electrolytic cell medium inlet and outlet structure comprises a plate body, a circumferential side wall of the plate body being fixedly connected to the medium inlet and outlet structure, the medium inlet and outlet structure being relatively connected to a gas-liquid channel inside the plate body, the medium inlet and outlet structure comprising an integrated connecting pipe, and the integrated connecting pipe being relatively fixedly connected to an external connecting pipe.

[0010] By adopting the above technical solution, a medium inlet and outlet structure is processed on the side wall of the electrode body, so that the interior of the medium inlet and outlet structure is relatively connected with the gas-liquid channel inside the electrode body, and the integrated connecting pipe is welded to the external connecting pipe, thereby reducing the risk of leakage at the gas outlet of the electrolytic cell, extending the service life of the electrolytic cell, and reducing the economic loss caused by the repair of the electrolytic cell leakage.

[0011] Optionally, a butt welding groove is provided at an end of the integrated connecting pipe which is away from one end of the electrode plate body.

[0012] By adopting the above technical solution, a butt welding groove is provided at the end of the integrated pipe away from the electrode body, so that when the integrated pipe is relatively connected to the external pipe, the saddle-shaped fillet weld is converted into an ordinary butt welding weld, the welding difficulty is reduced, the welding quality is improved, and the quality can be controlled by means of flaw detection such as radiographic detection; the weld, which is the weak point of the pipe, is transferred from the root of the pipe, which is more affected by the vibration of the pipeline, to the middle of the pipe, which greatly reduces the risk of weld leakage.

[0013] Optionally, the integrated connecting pipe includes a thick tube wall close to one end of the electrode body and a thin tube wall away from one end of the electrode body, and the thick tube wall and the thin tube wall are coaxially arranged and relatively fixedly connected.

[0014] Optionally, the positions where the thick tube wall and the thin tube wall are relatively connected are smoothly connected with inclined surfaces.

[0015] Optionally, the integrated connecting pipe is chamfered at a position where one end of the integrated connecting pipe close to the electrode plate body is relatively connected to the circumferential side wall of the electrode plate body.

[0016] By adopting the above technical solution, the bottom wall of the integrated connecting pipe is thicker, and the connection with the end pole frame (or the middle pole plate) is rounded, which reduces the vibration of the pipeline and increases the strength of the pipeline.

[0017] Optionally, a medium inlet and outlet hole is coaxially opened inside the integrated connecting pipe, and the medium inlet and outlet hole is relatively connected with the gas-liquid channel, and the medium inlet and outlet hole relatively connects the inside of the gas-liquid channel with the outside.

[0018] Optionally, the interior of the integrated connecting pipe is rounded relative to the position where the medium inlet and outlet holes are connected to the gas-liquid channel.

[0019] By adopting the above technical solution, the bottom of the inner hole of the integrated connecting pipe and the gas-liquid channel are rounded, which can, on the one hand, reduce the erosion and corrosion effect of the gas-liquid flow on the end plate (or the middle plate); on the other hand, the rounded corners have a better electroplating effect than the sharp corners and can play a better protective role.

[0020] Optionally, the electrode plate body and the medium inlet and outlet structure are integrally formed.

[0021] Optionally, the outer diameter of the end of the integrated connecting pipe away from the electrode plate body is the same as the outer diameter of the external connecting pipe, and the inner diameter of the end of the integrated connecting pipe away from the electrode plate body is the same as the inner diameter of the external connecting pipe.

[0022] Optionally, a plurality of the medium inlet and outlet structures are provided along the circumferential side wall of the electrode plate body.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The saddle-shaped fillet weld is transformed into an ordinary butt weld, which reduces the welding difficulty, improves the welding quality, and can be controlled by radiographic inspection and other flaw detection methods. The weld, as the weak point of the pipe, is transferred from the pipe root, which is more affected by pipeline vibration, to the middle of the pipe, greatly reducing the risk of weld leakage.

[0025] 2. The bottom wall of the integrated pipe is thicker, and the connection with the end pole frame (or intermediate pole plate) is rounded, which reduces the vibration of the pipeline and increases the strength of the pipeline.

[0026] 3. The bottom of the inner hole of the integrated pipe is chamfered at the connection between the gas-liquid channel. On the one hand, it can reduce the erosion and corrosion effect of the gas-liquid flow on the end plate (or the middle plate). On the other hand, the rounded corner has a better electroplating effect than the sharp corners and can play a better protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an integrated electrolytic cell medium inlet and outlet structure in an embodiment of the present application.

[0028] Figure 2 It is a cross-sectional view of an integrated electrolytic cell medium inlet and outlet structure in an embodiment of the present application.

[0029] Explanation of the reference numerals: 1. Plate body; 2. Medium inlet and outlet structure; 21. One-piece connecting pipe; 211. Thick tube wall; 212. Thin tube wall; 213. Connecting part; 22. Butt welding groove; 24. Medium inlet and outlet holes; 3. Gas-liquid channel. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0032] As the core equipment of the water electrolysis hydrogen production industry, the electrolyzer is mainly made of several electrolysis chambers compressed together. By energizing the electrolyzer, the water in each chamber is electrolyzed into hydrogen and oxygen. Hydrogen and oxygen are collected along their respective channels and sent out through the electrolyzer medium inlet and outlet.

[0033] At present, the structures of the inlet and outlet of the electrolytic cell medium are mainly divided into two types:

[0034] (1) The inlet and outlet of the electrolytic cell medium are opened on the end pressure plate: the holes for the inlet and outlet of the medium are directly processed at the corresponding positions on the end pressure plate. This structure makes the end pressure plate, which plays a compressing role, directly contact with the highly corrosive alkali solution as the electrolyte. Therefore, the heavy end pressure plate has to be nickel-plated as a whole to prevent the end pressure plate from being corroded by the alkali solution and damaging the electrolytic cell. The medium inlet and outlet holes also need to be specially protected by embedding nickel tubes.

[0035] (2) The medium inlet and outlet of the electrolytic cell are opened on the end plate or the middle plate: the thickness of the plates at both ends or in the middle of the electrolytic cell is increased, and several medium inlet and outlet holes are opened on the top of the thick plate. The pipes of corresponding specifications are inserted into the holes for welding, and the flange is connected to the other side of the pipe. After processing, the whole is nickel-plated.

[0036] Regarding the above-mentioned related technologies, the inventors believe that when the medium inlet and outlet are located on the end pressure plate, the manufacturing links and costs of the end pressure plate are increased, and the surface coating of the end pressure plate is easily damaged when connecting the external connecting pipe; when the medium inlet and outlet are located on the end plate or the middle plate, the weld between the connecting pipe and the thick plate is saddle-shaped, which makes welding difficult, the microstructure of the weld surface is complex, the coating thickness is uneven, and there is a risk of corrosion.

[0037] In order to reduce the risk of leakage at the gas outlet of the electrolytic cell, extend the service life of the electrolytic cell, and reduce the economic losses caused by electrolytic cell leakage and repair, the present application provides an integrated electrolytic cell medium inlet and outlet structure.

[0038] The following is combined with Figure 1-2 This application is described in further detail.

[0039] The present application embodiment discloses an integrated electrolytic cell medium inlet and outlet structure. Figure 1 , Figure 2 An integrated electrolytic cell medium inlet and outlet structure includes a plate body 1, which can be an end plate or an intermediate plate in the electrolytic cell. The plate body 1 is a cylindrical hollow structure, and a medium inlet and outlet structure 2 is arranged on the circumferential side wall of the plate body 1. The medium inlet and outlet structure 2 and the plate body 1 are an integrated structure. Multiple medium inlet and outlet structures 2 are equidistantly arranged along the circumferential side wall of the plate body 1, and the interiors of the multiple medium inlet and outlet structures 2 are relatively connected to the gas-liquid channel 3 located inside the plate body 1.

[0040] The medium inlet and outlet structure 2 includes an integrated pipe 21, which is fixedly connected to the plate body 1. The integrated pipe 21 includes a thick tube wall 211 at one end close to the plate body 1 and a thin tube wall 212 at one end away from the plate body 1. The outer diameter of the thick tube wall 211 is greater than the outer diameter of the thin tube wall 212. The thick tube wall 211 and the thin tube wall 212 are both hollow cylindrical structures, and the thick tube wall 211 and the thin tube wall 212 are coaxially arranged and fixedly connected.

[0041] A connecting portion 213 is provided between the thick tube wall 211 and the thin tube wall 212. The outer wall of the connecting portion 213 is an inclined wall body. The outer diameter of the connecting portion 213 gradually increases from the side close to the thin tube wall 212 to the side close to the thick tube wall 211. The side where the connecting portion 213 is connected to the thin tube wall 212 is smoothly transitioned, and the side where the connecting portion 213 is connected to the thick tube wall 211 is smoothly transitioned.

[0042] A butt welding groove 22 is provided at one end of the thin pipe wall 212 away from the thick pipe wall 211. The butt welding groove 22 can facilitate the alignment of the thin pipe wall 212 with the external pipe connection, and the thin pipe wall 212 and the external pipe connection are relatively welded and fixed. The original saddle-shaped fillet weld is changed into a butt welding weld, which reduces the welding difficulty, improves the welding quality, and can be controlled by flaw detection methods such as radiographic detection. The weld, as the weak point of the pipe connection, is transferred from the root of the pipe connection, which is more affected by the vibration of the pipeline, to the middle of the pipe connection, which greatly reduces the risk of weld leakage.

[0043] A rounded corner is provided at a position where the thick tube wall 211 is connected to the electrode body 1 on one side close to the electrode body 1 , so as to reduce the vibration of the pipeline and increase the strength of the pipeline.

[0044] A medium inlet and outlet hole 24 is provided inside the integrated connecting pipe 21. The medium inlet and outlet hole 24 completely penetrates the inside of the integrated connecting pipe 21, and one end of the medium inlet and outlet hole 24 is relatively connected to the gas-liquid channel 3 inside the electrode body 1, and the other end of the medium inlet and outlet hole 24 is relatively connected to the outside world, so that the gas-liquid channel 3 inside the electrode body 1 is relatively connected to the outside world through the medium inlet and outlet hole 24.

[0045] The end of the medium inlet and outlet hole 24 opposite to the gas-liquid channel 3 inside the plate body 1 is rounded, so that on the one hand, the erosion and corrosion of the plate body 1 by the gas-liquid flow can be reduced, and on the other hand, the rounded corner has a better electroplating effect than the sharp corner, which can play a better protective role.

[0046] In the present invention, the term "plurality" means at least two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0047] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. An integrated electrolytic cell medium inlet and outlet structure, Features: The invention comprises a plate body (1), a medium inlet and outlet structure (2) being fixedly connected to the circumferential side wall of the plate body (1), the medium inlet and outlet structure (2) being relatively connected to a gas-liquid channel (3) inside the plate body (1), the medium inlet and outlet structure (2) comprising an integrated pipe (21), and the integrated pipe (21) being relatively fixedly connected to an external pipe.

2. According to claim 1, an integrated electrolytic cell medium inlet and outlet structure, Features: A butt welding groove (22) is provided at the end of the integrated pipe (21) away from the electrode body (1).

3. According to claim 1, an integrated electrolytic cell medium inlet and outlet structure, Features: The integrated pipe (21) comprises a thick pipe wall (211) at one end close to the electrode body (1) and a thin pipe wall (212) at one end away from the electrode body (1); the thick pipe wall (211) and the thin pipe wall (212) are coaxially arranged and relatively fixedly connected.

4. According to claim 3, an integrated electrolytic cell medium inlet and outlet structure, Features: The positions where the thick tube wall (211) and the thin tube wall (212) are relatively connected are smoothly connected with inclined surfaces.

5. According to claim 1, an integrated electrolytic cell medium inlet and outlet structure, Features: The integrated connecting pipe (21) is provided with a rounded corner at a position where one end of the connecting pipe (21) is close to the electrode plate body (1) and is relatively connected to the circumferential side wall of the electrode plate body (1).

6. The integrated electrolytic cell medium inlet and outlet structure according to claim 1, Features: The integrated pipe (21) has a coaxial medium inlet and outlet hole (24) formed inside, the medium inlet and outlet hole (24) being relatively connected to the gas-liquid channel (3), and the medium inlet and outlet hole (24) relatively connects the inside of the gas-liquid channel (3) with the outside.

7. The integrated electrolytic cell medium inlet and outlet structure according to claim 6, Features: The inside of the integrated connecting pipe (21) is rounded at a position where the medium inlet and outlet holes (24) are connected to the gas-liquid channel (3).

8. An integrated electrolytic cell medium inlet and outlet structure according to any one of claims 1 to 7, Features: The electrode plate body (1) and the medium inlet and outlet structure (2) are integrally formed.

9. The integrated electrolytic cell medium inlet and outlet structure according to claim 8, Features: The outer diameter of the end of the integrated connecting pipe (21) away from the plate body (1) is the same as the outer diameter of the external connecting pipe, and the inner diameter of the end of the integrated connecting pipe (21) away from the plate body (1) is the same as the inner diameter of the external connecting pipe.

10. The integrated electrolytic cell medium inlet and outlet structure according to claim 8, Features: The medium inlet and outlet structures (2) are arranged in plurality along the circumferential side wall of the electrode plate body (1).

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