Pole frame structure capable of being assembled

Abstract

The pole frame structure capable of being assembled comprises a pole frame body, a bipolar plate, a pole frame pressing ring, an alkali liquor inlet, a hydrogen outlet and an oxygen outlet, and the alkali liquor inlet, the hydrogen outlet and the oxygen outlet are all formed in the pole frame body; a flow channel communicated with the alkali liquor inlet, the hydrogen outlet and the oxygen outlet is formed in the pole frame body, a matching face a and a matching face b are arranged on an inner ring of the pole frame body, the bipolar plate is assembled on the matching face b, the matching face a is an inclined face inclining towards the center of the pole frame body and is connected with the outer end face of the pole frame pressing ring in a clamped mode, and the matching face b is an inclined face inclining towards the center of the pole frame body. And the bipolar plate is pressed and fixed on the matching surface b of the pole frame body by the pole frame pressing ring. The utility model aims to provide the electrode frame structure which can be quickly produced in batches, is light in weight, does not need to be electroplated and is not easy to corrode.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of machining and water electrolysis hydrogen production, and specifically relates to an assemblable pole frame structure for water electrolysis hydrogen production. BACKGROUND

[0002] The pole frame is a basic core component in the water electrolysis hydrogen production process, and bears the installation and support functions of all key parts participating in the electrolysis chemical reaction. The structure combining the metal pole frame and the milk convex plate through welding is generally used in the current market. However, this structure has several technical problems to be solved, including:

[0003] (1) Long production cycle: the welding process of the metal pole frame is complicated, resulting in a long overall production cycle and affecting production efficiency.

[0004] (2) Significant environmental impact: the pole frame after welding often needs to be electroplated to enhance its performance, but this process involves harmful chemical substance emissions, which has adverse effects on the environment.

[0005] (3) Relatively large weight: the use of metal material makes the overall weight of the pole frame heavier, which is not conducive to the lightweight design and transportation and installation of the equipment.

[0006] (4) Limited corrosion resistance: in the long-term use process, the metal pole frame is easily corroded by the electrolysis environment, reducing the structural strength and service life.

[0007] (5) Metal pollution problem: the metal material may dissolve during the electrolysis process, not only polluting the electrolyte and interfering with the electrolysis efficiency, but also negatively affecting the performance of the entire hydrogen production system, shortening the system life or increasing the frequency of maintenance.

[0008] The prior art CN216808983U discloses a pole plate for an alkaline electrolysis cell, the first pole frame, the plate body and the second pole frame are ultrasonically welded, the interface is tightly combined, has good sealing performance, avoids the warping deformation problem of the injection molded part after cooling, simplifies assembly and improves flatness. The first pole frame and the second pole frame are made of engineering plastic material, which reduces the mass of the electrolysis cell, has high processing efficiency and low cost, and avoids the problem of corrosion resistance of the metal pole frame. However, this technical solution cannot improve production efficiency by assembling components. UTILITY MODEL CONTENTS

[0009] To make up for the deficiencies of the prior art, the utility model aims to provide a pole frame structure that can be quickly mass-produced, is light in quality, does not need electroplating and is not easily corroded.

[0010] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0011] An assemblable polar frame structure, comprising a polar frame body, a bipolar plate, a polar frame compression ring, a lye inlet, a hydrogen outlet and an oxygen outlet, wherein the lye inlet, the hydrogen outlet and the oxygen outlet are arranged on the polar frame body; the polar frame body is internally provided with flow channels in communication with the lye inlet, the hydrogen outlet and the oxygen outlet; the inner circle of the polar frame body is provided with a matching surface a and a matching surface b, the bipolar plate is assembled on the matching surface b, the matching surface a is an inclined surface inclined to the center of the polar frame body and is clamped with the outer end surface of the polar frame compression ring, so that the polar frame compression ring compresses and fixes the bipolar plate on the matching surface b of the polar frame body.

[0012] Further, the polar frame body is a circular ring structure with a thickness, and the inner side is provided with a boss, the matching surface a and the matching surface b are two wall surfaces of the boss on the inner side of the polar frame body; the bipolar plate is a disc structure; the polar frame compression ring is a circular truncated cone structure with an inclined outer wall surface matched with the matching surface a.

[0013] Further, the outer circle of the polar frame body is provided with a plurality of sealing lines for sealing between the polar frame body and adjacent components.

[0014] Further, the cross section of the sealing line is triangular, and the triangular sealing line is embedded in the polar frame body.

[0015] Further, the polar frame body and the polar frame compression ring are made of plastic material.

[0016] Further, the bipolar plate is a nickel plate.

[0017] Beneficial effects:

[0018] The utility model discloses a novel assemblable polar frame structure. Wherein, the polar frame body is the basis of the whole polar frame structure, the polar frame body adopts the plastic material of injection molding production, not only reduces the overall weight, also avoids the corrosion and pollution problem that metal material can bring, the lye inlet, the hydrogen outlet and the oxygen outlet are equipped on the polar frame body, these ports are communicated with the flow channel in the polar frame body, ensure the inflow of electrolyte and the outflow of gas. The bipolar plate is assembled on the matching surface of the polar frame body, as the key component of electrolytic reaction, it is responsible for conducting current and supporting electrolysis process, the bipolar plate adopts nickel plate material, because it has good conductivity and corrosion resistance, can keep stable in electrolytic environment for a long time. The polar frame compression ring is used for compressing and fixing the bipolar plate on the polar frame body, ensures the stability and sealing property in the electrolysis process, the design of the polar frame compression ring makes the assembly process more simple, does not need complex welding or electroplating treatment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The assembly schematic view of the assemblable polar frame structure;

[0020] Figure 2This is a schematic diagram of the negative electrode side structure on the front of the electrode frame;

[0021] Figure 3 This is a schematic diagram of the structure on the positive electrode side of the polarity frame.

[0022] Figure 4 for Figure 2 A schematic diagram of the structure of the A-direction alkaline solution inlet;

[0023] Figure 5 for Figure 2 A schematic diagram of the structure of the B-direction alkaline solution inlet;

[0024] Figure 6 for Figure 2 A schematic diagram of the C-direction hydrogen outlet structure;

[0025] Figure 7 for Figure 2 A schematic diagram of the D-direction hydrogen outlet structure;

[0026] Figure 8 for Figure 3 A schematic diagram of the structure of the A-direction alkaline solution inlet;

[0027] Figure 9 for Figure 3 A schematic diagram of the structure of the B-direction alkaline solution inlet;

[0028] Figure 10 for Figure 3 A schematic diagram of the C-direction oxygen outlet structure;

[0029] Figure 11 for Figure 3 A schematic diagram of the D-direction oxygen outlet structure;

[0030] Figure 12 A side sectional view of an assemblable pole frame structure;

[0031] In the figure: 1. Electrode frame body; 2. Bipolar plate; 3. Electrode frame pressure ring; 4. Alkali inlet; 5. Hydrogen outlet; 6. Oxygen outlet; 7. Sealing line; 8. Mating surface a; 9. Mating surface b. Detailed Implementation

[0032] To more clearly illustrate the purpose, technical solutions, and advantages of this disclosure, the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the following description of the embodiments is intended to explain and illustrate the overall concept of this disclosure and should not be construed as limiting the disclosure. In the specification and drawings, the same or similar reference numerals refer to the same or similar parts or components. For clarity, the drawings are not necessarily drawn to scale, and some well-known parts and structures may be omitted from the drawings.

[0033] In the description of the present disclosure, it should be pointed out that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present disclosure, it should be pointed out that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0036] Embodiment 1

[0037] An assemblable polar frame structure, comprising a polar frame body 1, a bipolar plate 2, a polar frame compression ring 3, a lye inlet 4, a hydrogen outlet 5 and an oxygen outlet 6, the lye inlet 4, the hydrogen outlet 5 and the oxygen outlet 6 are all arranged on the polar frame body 1; the polar frame body 1 is internally provided with a flow channel in communication with the lye inlet 4, the hydrogen outlet 5 and the oxygen outlet 6, the inner ring of the polar frame body 1 is provided with a matching surface a 8 and a matching surface b 9, the bipolar plate is assembled on the matching surface b 9, the matching surface a 8 is an inclined surface inclined to the center of the polar frame body 1 and is clamped with the outer end surface of the polar frame compression ring 3, so that the polar frame compression ring 4 tightly presses and fixes the bipolar plate 2 on the matching surface b 9 of the polar frame body 1.

[0038] Among them, the polar frame body 1 is a circular ring structure, and the inner side is provided with a boss; the bipolar plate 2 is a disc structure; the polar frame compression ring 3 is a circular truncated cone structure, which has an inclined outer wall surface matched with the matching surface a 8; a plurality of sealing lines 7 are arranged on the outer ring of the polar frame body 1, which are used for sealing between the polar frame body 1 and the adjacent components. The number of the sealing lines 7 is 7, the distance between each sealing line 7 is 2.0mm, the depth is 0.3mm, and the cross section is triangular, the triangular sealing line 7 is embedded in the polar frame body 1, which plays a sealing and anti-sealing gasket creep role; the bipolar plate 2 is a nickel plate, considering the cost, space and strength, 0.5mm thick nickel plate is the best choice for the bipolar plate 2.

[0039] Example 2

[0040] This embodiment provides an installation example of an assemblable pole frame structure. For example... Figure 1 As shown, the pole frame body 1 is the main assembly of the product. The bipolar plate 2 is assembled onto the mating surface b9 of the pole frame body 1. The mating surface a8 and the pole frame pressure ring 3 press the bipolar plate 2 tightly and fix it onto the mating surface b9 of the pole frame body 1. The contact surfaces of the bipolar plate 2 and the pole frame 1 are bonded and sealed by adhesive process and perfluorinated glue, thus obtaining the pole frame structure of this embodiment.

[0041] like Figure 2 As shown, the alkaline inlet 4, hydrogen outlet 5, and oxygen outlet 6 on the electrode frame body 1 are all circular. The angle between the line connecting the hydrogen outlet 5 and the center of the electrode frame body 1 and the line connecting the oxygen outlet 6 and the center of the electrode frame body 1 is less than 40°.

[0042] Based on measurements, the production efficiency of the electrode frame structure in this application is conservatively estimated at 1 piece / minute. The density of a typical metal electrode frame is 7.8 g / cm³. 3 The density of the pole frame produced by injection molding is 1.3 g / cm³. 3 .

[0043] Example 3

[0044] This embodiment provides the working process of the water electrolysis hydrogen production process in the electrode frame structure.

[0045] During electrolysis, the electrolyte enters the flow channel inside the electrode frame body 1 through the alkaline inlet 4. Then, under the influence of the electric field generated by the bipolar plate 2, the electrolyte undergoes an electrolytic reaction, producing oxygen on the positive electrode side and hydrogen on the negative electrode side. Because the electrolysis process produces gases, the generated hydrogen and oxygen are discharged from the electrode frame structure through the relatively low-pressure hydrogen outlet 5 and oxygen outlet 6, respectively. The bipolar plate 2, as a conductive component in the electrolysis reaction, conducts current from the external power source into the electrolyte, initiating the electrolytic reaction.

[0046] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be included within the protection scope of the present invention.

Claims

1. An assemblable pole frame structure, characterized in that, The application relates to a bipolar frame, which comprises a bipolar frame body (1), a bipolar plate (2), a bipolar frame pressing ring (3), a lye inlet (4), a hydrogen outlet (5) and an oxygen outlet (6), wherein the lye inlet (4), the hydrogen outlet (5) and the oxygen outlet (6) are arranged on the bipolar frame body (1); the bipolar frame body (1) is internally provided with flow channels communicated with the lye inlet (4), the hydrogen outlet (5) and the oxygen outlet (6); the inner ring of the bipolar frame body (1) is provided with a matching surface a (8) and a matching surface b (9), the bipolar plate (2) is assembled on the matching surface b (9), the matching surface a (8) is an inclined surface inclined to the center of the bipolar frame body (1) and is clamped with the outer end surface of the bipolar frame pressing ring (3), so that the bipolar frame pressing ring (3) presses and fixes the bipolar plate (2) on the matching surface b (9) of the bipolar frame body (1).

2. The packable pole frame structure of claim 1, wherein, The bipolar frame body (1) is a circular ring structure with a thickness, and is internally provided with a boss; the matching surface a (8) and the matching surface b (9) are respectively two wall surfaces of the boss on the inner side of the bipolar frame body (1); the bipolar plate (2) is a disc structure; the bipolar frame pressing ring (3) is a circular truncated cone structure, and has an inclined outer wall surface matched with the matching surface a (8).

3. The packable pole frame structure of claim 1, wherein, The outer ring of the bipolar frame body (1) is provided with a plurality of sealing lines (7) for sealing between the bipolar frame body (1) and adjacent components.

4. The packable pole frame structure of claim 3, wherein, The cross section of the sealing line (7) is triangular, and the triangular sealing line (7) is embedded in the bipolar frame body (1).

5. An assemblable pole frame structure according to any one of claims 1-4, characterized in that The bipolar frame body (1) and the bipolar frame pressing ring (3) are made of plastic.

6. The assemblable pole frame structure of claim 5, wherein, The bipolar plate (2) is a nickel plate.

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