Flange type electrolytic bath medium inlet and outlet structure

Abstract

The utility model provides a flange type electrolytic bath medium inlet and outlet structure. The structure comprises a polar plate body 1, a flange type medium inlet / outlet 2 and a gas-liquid channel 3, the polar plate body 1 is of an annular structure and is encircled to form a gas-liquid channel 3; the flange type medium inlet / outlet 2 is formed in the polar plate body 1 and comprises a flange surface 21, a threaded hole 22, a flange sealing surface 23 and a medium inlet / outlet hole 24; the flange surface 21 is a plane arranged on the surface of the polar plate body 1; a medium inlet / outlet hole 24 is formed in the center of the flange surface 21, penetrates through the polar plate body 1 and is communicated with the gas-liquid channel 3; the flange sealing surface 23 is arranged around the medium inlet and outlet hole 24 and is used for being connected with a corresponding flange in a sealing manner; the two or more threaded holes 22 are formed around the flange sealing face 23 and used for being connected with bolts of a companion flange. The structure can eliminate electrolytic cell medium inlet and outlet welding seams, avoid leakage of the medium inlet and outlet welding seams, prolong the service life of the electrolytic cell and reduce economic loss caused by leakage of the electrolytic cell welding seams.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrolytic cell for hydrogen production by electrolysis, in particular to a flange type electrolytic cell medium inlet and outlet structure. BACKGROUND

[0002] The electrolytic cell, as the core equipment of the water electrolysis hydrogen production industry, is mainly made by pressing several electrolytic cells. By applying electricity to the electrolytic cell, water in each cell is electrolyzed into hydrogen and oxygen. Hydrogen and oxygen are collected along their respective channels and sent out through the electrolytic cell medium outlet.

[0003] Currently, the structure of the electrolytic cell medium inlet and outlet is mainly divided into two types:

[0004] (1) The electrolytic cell medium inlet and outlet are opened on the end pressure plate

[0005] The hole of the medium inlet and outlet is directly processed on the corresponding position of the end pressure plate. This structure makes the end pressure plate, which plays a pressing role, directly contact with the strong corrosive alkali solution as the electrolyte, so 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 hole also needs to be specially protected by embedding a nickel tube.

[0006] This structure currently has the following disadvantages:

[0007] ① It greatly increases the manufacturing process and production cost of the end pressure plate;

[0008] ② The heavy end pressure plate increases the difficulty of electroplating;

[0009] ③ When connecting the external pipe to the electrolytic cell medium inlet and outlet, the surface plating of the end pressure plate is easily damaged;

[0010] ④ As a vulnerable part, the medium inlet and outlet on the end pressure plate greatly increases the maintenance cost of the electrolytic cell.

[0011] (2) The electrolytic cell medium inlet and outlet are opened on the end or intermediate electrode plate

[0012] The thickness of the electrode plate at both ends or in the middle of the electrolytic cell is increased, and several medium inlet and outlet holes are opened at the top and bottom of the thick electrode plate. The corresponding size of the pipe is inserted into the hole for welding, and the other side of the pipe is connected to the flange. After processing, the whole is nickel-plated. This structure has relatively high requirements for welding and electroplating processes, and currently has the following disadvantages:

[0013] ① The welding seam between the pipe and the thick electrode plate is saddle-shaped, which is difficult to weld and the welding quality is difficult to guarantee;

[0014] ② The microstructure of the welding seam surface is complex, which makes the plating thickness at this place uneven and has a risk of corrosion;

[0015] ③The pipe vibration during the operation of the equipment directly acts on the weld at the root of the connecting pipe, and long-term pipe vibration can affect the strength of the weld, thereby greatly increasing the risk of leakage of the electrolytic cell.

[0016] Based on the above reasons, it is necessary to improve the existing electrolytic cell medium inlet and outlet structure. Utility model content

[0017] The utility model discloses a flange type electrolytic cell medium inlet and outlet structure, eliminates electrolytic cell medium inlet and outlet weld, avoids medium inlet and outlet weld leakage, prolongs the service life of electrolytic cell, reduces the economic loss caused by electrolytic cell weld leakage.

[0018] The utility model embodiment provides a flange type electrolytic cell medium inlet and outlet structure, include: polar plate body 1, flange type medium inlet and outlet 2 and gas liquid passage 3.

[0019] The polar plate body 1 is annular structure, and the gas liquid passage 3 is formed by surrounding setting;

[0020] The flange type medium inlet and outlet 2 are set up on the polar plate body 1, and the flange type medium inlet and outlet 2 include flange face 21, threaded hole 22, flange sealing surface 23 and medium inlet and outlet hole 24;

[0021] The flange face 21 is the plane set on the surface of the polar plate body 1;

[0022] The medium inlet and outlet hole 24 is set up through the center of the flange face 21, and the polar plate body 1 is communicated with the gas liquid passage 3;

[0023] The flange sealing surface 23 is set up around the medium inlet and outlet hole 24 and is used for being connected with the corresponding flange sealing;

[0024] Two or more threaded holes 22 are set up around the flange sealing surface 23 and are used for being connected with the nut of the matched flange.

[0025] In some embodiments, the number of threaded holes 22 is twice the number of bolt holes of the matched flange.

[0026] In some embodiments, the specification of the threaded hole 22 is consistent with the specification of the nut used by the matched flange.

[0027] In some embodiments, the position of the threaded hole 22 corresponds to the mounting position of the matched flange on the flange face 21.

[0028] In some embodiments, the bottom of the medium inlet and outlet hole 24 is rounded at the connection with the gas liquid passage 3.

[0029] In some embodiments, the flange sealing surface 23 is matched according to the corresponding flange standard.

[0030] In some embodiments, the flange face 21 is a flat surface provided on the surface of the polar plate body 1, comprising:

[0031] The flange face 21 is a flat surface formed by subtractive machining on the curved surface of the polar plate body 1.

[0032] In some embodiments, the number of flange type medium inlets and outlets 2 includes two or more.

[0033] In some embodiments, two or more flange type medium inlets and outlets 2 are arranged continuously and / or at intervals along the surface of the polar plate body 1.

[0034] In some embodiments, the number of flange type medium inlets and outlets 2 is four.

[0035] The beneficial effects of the above embodiments of the utility model include:

[0036] The flange structure is machined on the intermediate polar plate (or end polar plate) body, and the flange connection is performed with the external connecting pipe, compared with the original welding structure, the medium inlet and outlet weld on the electrolytic cell body is eliminated, and the problem of electrolytic cell body weld leakage is avoided.

[0037] The number of threaded holes machined on the flange face is twice the number of paired flange threaded holes, when a group of threaded holes fails, the paired flange can be rotated by a certain angle, and another group of threaded holes is used, avoiding the problem of replacing the whole polar plate caused by the failure of the threaded holes.

[0038] The flange type medium inlet and outlet hole bottom and the gas-liquid passage connection are filleted, on the one hand, the gas-liquid flow can weaken the scouring and corrosion effect of the intermediate polar plate (or end polar plate), on the other hand, the fillet has better electroplating effect than the corner, and can play a better protection role. BRIEF DESCRIPTION OF DRAWINGS

[0039] The accompanying drawings generally illustrate various embodiments discussed herein in an exemplary, but non-limiting fashion.

[0040] Figure 1 It is an electrolytic cell flange type medium inlet and outlet structure schematic diagram;

[0041] Figure 2 It is a medium inlet and outlet structure detail drawing;

[0042] Figure 3 It is a corresponding Figure 2 A-A structure schematic diagram.

[0043] Symbol explanation:

[0044] 1-plate body; 2-flange type medium inlet and outlet; 3-gas-liquid channel; 21-flange surface; 22-threaded hole; 23-flange sealing surface; 24-medium inlet and outlet holes. DETAILED DESCRIPTION

[0045] In order to enable a more detailed understanding of the features and technical contents of the embodiments of the present application, the implementation of the embodiments of the present application is described in detail below with reference to the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present application.

[0046] In the description of the embodiments of this application, it should be noted that, unless otherwise specified and limited, the term "connection" should be understood in a broad sense. For example, it can be an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meaning of the above terms can be understood according to the specific circumstances.

[0047] It should be noted that the terms "first, second, and third" in the embodiments of the present application are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It is understood that the terms "first, second, and third" can be interchanged to represent a specific order or precedence where permitted. It should be understood that the objects distinguished by "first, second, and third" can be interchanged where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0048] The following is combined with Figures 1 to 3 The embodiments of the present utility model are described in detail.

[0049] The present invention provides a flange-type electrolytic cell medium inlet and outlet structure, such as Figure 1 As shown, it includes: a plate body 1, a flange-type medium inlet and outlet 2 and a gas-liquid channel 3.

[0050] The plate body 1 is an annular structure, and is surrounded by a gas-liquid channel 3 .

[0051] The flange type medium inlet and outlet 2 is opened on the plate body 1, such as Figure 2 As shown, the flange type medium inlet and outlet 2 includes a flange surface 21, a threaded hole 22, a flange sealing surface 23 and a medium inlet and outlet hole 24.

[0052] The flange surface 21 is a plane provided on the surface of the electrode body 1 .

[0053] like Figure 2 and Figure 3 As shown, the medium inlet and outlet hole 24 is opened at the center of the flange surface 21 and passes through the electrode body 1 to communicate with the gas-liquid channel 3.

[0054] The flange sealing surface 23 is arranged around the medium inlet and outlet hole 24, and is used for sealing connection with a corresponding flange.

[0055] The two or more threaded holes 22 are arranged around the flange sealing surface 23, and are used for nut connection of a matched flange.

[0056] In some embodiments, the number of threaded holes 22 is twice the number of bolt holes of the matched flange.

[0057] In some embodiments, the threaded hole 22 is of the same specification as the nut used by the matched flange.

[0058] In some embodiments, the threaded hole 22 is located corresponding to the installation position of the matched flange on the flange surface 21.

[0059] In some embodiments, the bottom of the medium inlet and outlet hole 24 is chamfered at the connection with the gas-liquid passage 3.

[0060] In some embodiments, the flange sealing surface 23 is matched according to the corresponding flange standard.

[0061] In some embodiments, the flange surface 21 is a flat surface arranged on the surface of the polar plate body 1, and includes:

[0062] The flange surface 21 is a flat surface formed by subtracting material from the curved surface of the polar plate body 1.

[0063] In some embodiments, the number of flange type medium inlets and outlets 2 includes two or more.

[0064] In some embodiments, the two or more flange type medium inlets and outlets 2 are arranged continuously and / or at intervals along the surface of the polar plate body 1.

[0065] In some embodiments, the number of flange type medium inlets and outlets 2 is four.

[0066] On the intermediate polar plate (or end polar plate) body, a flange structure is machined, and a flange connection is performed with an external pipe, which eliminates the medium inlet and outlet weld on the electrolytic cell body and avoids the problem of electrolytic cell body weld leakage compared with the original welded structure.

[0067] The number of threaded holes machined on the flange surface is twice the number of bolt holes of the matched flange. When a group of threaded holes fails, the matched flange can be rotated by a certain angle, and another group of threaded holes is used, which avoids the problem of replacing the entire polar plate caused by the failure of the threaded holes.

[0068] The bottom of the flange type medium inlet and outlet hole is chamfered at the connection with the gas-liquid passage, which can weaken the scouring and corrosion effect of gas-liquid flow on the intermediate polar plate (or end polar plate), and on the other hand, the chamfer has better electroplating effect than the corner, and can play a better protection role.

[0069] In some embodiments, the above embodiments of the present invention are implemented in the following ways:

[0070] (1) When machining the intermediate plate (or end plate), use a milling cutter to mill out a plane on the arc surface at the medium inlet and outlet positions as the flange surface 21.

[0071] (2) On the flange surface 21, a sealing surface 23 corresponding to the flange is machined according to the flange standard.

[0072] (3) The medium inlet and outlet holes 24 are machined on the flange surface 21.

[0073] (4) According to the required flange specifications, threaded holes 22 are machined at corresponding positions on the flange surface 21. The specifications of the threaded holes 22 are consistent with the specifications of the nuts used for the mating flange; the number of threaded holes 22 is twice the number of bolt holes in the mating flange.

[0074] (5) Figure 3 As shown, the bottom of the medium inlet and outlet holes 24 is rounded at the connection with the gas-liquid channel 3.

[0075] By using flange-type electrolytic cell media inlet and outlet structures, the media inlet and outlet welds on the electrolytic cell body are eliminated, avoiding the problem of electrolytic cell body weld leakage. This greatly reduces the risk of electrolytic cell returns due to weld leakage, saving the economic cost of returning electrolytic cells for repairs due to pipe leakage by approximately 200,000 yuan per unit. At the same time, the reduced leakage risk also ensures the safe operation of the electrolytic cell.

[0076] The technical solutions described in the embodiments of this application can be combined arbitrarily unless there is any conflict.

[0077] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A flange type electrolytic cell medium inlet and outlet structure, characterized by, The application relates to a polar plate body (1), a flange type medium inlet and outlet (2) and a gas-liquid channel (3). The polar plate body (1) is annular in structure and surrounds the gas-liquid channel (3). The flange type medium inlet and outlet (2) is arranged on the polar plate body (1) and comprises a flange surface (21), a threaded hole (22), a flange sealing surface (23) and a medium inlet and outlet hole (24). The flange surface (21) is a flat surface arranged on the polar plate body (1). The medium inlet and outlet hole (24) is arranged through the center of the flange surface (21) and penetrates the polar plate body (1) to communicate with the gas-liquid channel (3). The flange sealing surface (23) is arranged around the medium inlet and outlet hole (24) and is used for sealing connection with a corresponding flange. Two or more threaded holes (22) are arranged around the flange sealing surface (23) and are used for nut connection with a matched flange. The number of the threaded holes (22) is twice the number of bolt holes of the matched flange.

2. The flange-type electrolyzer medium inlet / outlet structure according to claim 1, characterized by, The threaded holes (22) have the same specifications as the nuts used by the matched flange.

3. The flange-type electrolyzer medium inlet / outlet structure according to claim 2, characterized by, The positions of the threaded holes (22) correspond to the mounting positions of the matched flange on the flange surface (21).

4. The flange-type electrolyzer medium inlet / outlet structure according to claim 2, characterized by, The bottom of the medium inlet and outlet hole (24) is chamfered at the connection position with the gas-liquid channel (3).

5. The flange-type electrolyzer medium inlet / outlet structure according to claim 1, characterized by, The flange sealing surface (23) is matched with the corresponding flange standard.

6. The flange-type electrolyzer medium inlet / outlet structure according to claim 1, characterized by, The flange surface (21) is a flat surface arranged on the polar plate body (1) and comprises the following parts:

7. The flange-type electrolyzer medium inlet / outlet structure according to claim 1, characterized by, The flange surface (21) is a flat surface formed by subtractive machining on the arc surface of the polar plate body (1). The number of the flange type medium inlet and outlet (2) is two or more.

8. The flange-type electrolyzer medium inlet / outlet structure according to claim 1, characterized by, Two or more flange type medium inlets and outlets (2) are arranged continuously and / or at intervals on the surface of the polar plate body (1).

9. The flange-type electrolyzer medium inlet / outlet structure according to claim 8, characterized by, The number of the flange type medium inlet and outlet (2) is four.

10. The flange-type electrolyzer medium inlet / outlet structure according to claim 9, characterized by, ​

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