Lightweight end plate for alkaline electrolytic cell

Abstract

The utility model discloses a lightweight end plate for an alkaline electrolytic bath. The lightweight end plate comprises a base and an end plate body welded on the base, the end plate body is provided with a lightweight structure, the lightweight structure comprises a plurality of arc-shaped contours distributed along the circumference of the end plate body, a plurality of through holes formed in the arc-shaped contours and a leaf groove area arranged in the middle of the end plate body, and the bottom of the end plate body is provided with a circumferential contour; and the end plate body is fixedly connected with the base through the circumferential contour and the arc-shaped contour of the end plate body. Simulation analysis is carried out through process simulation software, the structure of the end plate is optimized, performance parameters of a new end plate are guaranteed not to be reduced compared with that of an original end plate under the same working condition as the original end plate, meanwhile, the mass and the size of the end plate are reduced, and the effect of reducing the cost of the electrolytic cell is achieved.

Description

Technical Field

[0001] This utility model relates to the field of water electrolysis for hydrogen production technology, specifically to a lightweight end plate for alkaline electrolyzers. Background Technology

[0002] With the continuous optimization of the energy structure, the proportion of hydrogen energy in my country's final energy system is constantly increasing. Alkaline water electrolysis for hydrogen production is considered one of the most feasible methods because it can continuously produce high-purity hydrogen by consuming only electricity and water. If renewable energy sources such as wind and solar power are used for power generation, the electricity price will be further reduced. In addition, the oxygen byproduct of alkaline water electrolysis for hydrogen production also has certain practical value.

[0003] Currently, alkaline hydrogen production electrolyzers hold a dominant position as the most mature electrolysis technology. (See also...) Figure 1 Existing alkaline hydrogen production electrolyzers all use low-alloy steel end plates, which mainly serve a supporting and securing function. However, these end plates are large in size and often heavy, making installation and transportation difficult and costly in terms of manpower and resources.

[0004] To address the aforementioned technical problems, patent number 202222418487.8 discloses a lightweight end plate for an alkaline water electrolyzer. This end plate includes a base and a hollow spherical dome located on the base. The hollow spherical dome contains a reinforcing structure connected to the base. The outer edge of the base is decorated with petals arranged circumferentially; the petals are evenly distributed circumferentially; and the petals contain through holes.

[0005] The above-mentioned solution significantly reduces the mass and volume of the end plates in high-pressure alkaline electrolyzers by replacing the existing flat cylindrical design with a lightweight structure. However, the hollow spherical dome increases the space occupied by the end plates, and reinforcing ribs and connecting parts are required within the hollow spherical dome, resulting in a complicated manufacturing process and higher costs.

[0006] Therefore, it is necessary to improve the structure of the above scheme in order to overcome its defects. Utility Model Content

[0007] The purpose of this invention is to provide a lightweight end plate for alkaline electrolyzers to solve the problems existing in the prior art.

[0008] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0009] A lightweight end plate for an alkaline electrolyzer includes a base and an end plate body welded to the base. The end plate body has a lightweight structure, which includes a plurality of arc-shaped contours distributed along the circumference of the end plate body, a plurality of through holes opened on the arc-shaped contours, and a leaf groove area set in the middle of the end plate body. The bottom of the end plate body has a circumferential contour and is fixedly connected to the base through the arc-shaped contours and the circumferential contours.

[0010] Furthermore, the arc-shaped profile includes large arc-shaped profiles and small arc-shaped profiles, with several large arc-shaped profiles evenly distributed on the circumferential surface of the end plate body, and small arc-shaped profiles distributed between the large arc-shaped profiles.

[0011] Furthermore, the through hole includes a tension screw mounting hole and a lifting hole, with the tension screw mounting hole and lifting hole provided on the large arc contour and the tension screw mounting hole provided on the small arc contour.

[0012] Furthermore, the leaf groove area is provided with small leaf grooves and large leaf grooves, which are radially distributed with the center of the end plate body as the center, with the small leaf grooves distributed on the inner side and the large leaf grooves distributed on the outer side.

[0013] Furthermore, the base has a support plate at its bottom and several reinforcing ribs inside. The top of the base is an arc-shaped groove. The end plate body is set in the arc-shaped groove and is welded and fixed to the reinforcing ribs of the base and the circumferential contour of the arc-shaped groove through a small arc-shaped contour.

[0014] Furthermore, the small arc-shaped contours located within the arc-shaped groove correspond one-to-one with the reinforcing ribs, and the contact points between the small arc-shaped contours and the reinforcing ribs are designated as welding points.

[0015] In summary, this utility model has the following beneficial effects:

[0016] By using process simulation software for simulation analysis, the structure of the end plate is optimized. Under the same working conditions as the original end plate, the performance parameters of the new end plate are guaranteed to be no different from those of the original end plate. At the same time, the weight and volume of the end plate are reduced, thereby achieving the effect of reducing the cost of the electrolytic cell. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the end plate structure of an alkaline electrolytic cell in the prior art.

[0018] Figure 2 This is a schematic diagram of the lightweight end plate for alkaline electrolytic cells described in this utility model.

[0019] Figure 3 yes Figure 2 BB cross-section.

[0020] Figure 4 This is the front view of the base described in this utility model.

[0021] Figure 5 This is a side view of the lightweight end plate of the alkaline electrolytic cell described in this utility model.

[0022] Figure 6 This is a front view of the lightweight end plate body for alkaline electrolytic cells described in this utility model. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with the illustrations and specific embodiments.

[0024] like Figures 2 to 5 As shown, the present invention proposes a lightweight end plate for an alkaline electrolytic cell, comprising a base 1 and an end plate body 2 welded to the base 1; the end plate body 2 is provided with a lightweight structure, which includes a plurality of arc-shaped contours 3 distributed along the circumference of the end plate body 2, a plurality of through holes opened on the arc-shaped contours 3, and a leaf groove area 4 set in the middle of the end plate body 2; the bottom of the end plate body 2 is provided with a circumferential contour 5, and is fixedly connected to the base 1 through the arc-shaped contours 3 and the circumferential contour 5.

[0025] The arc-shaped contour 3 includes a large arc-shaped contour 31 and a small arc-shaped contour 32. Several large arc-shaped contours 31 are evenly distributed on the circumferential surface of the end plate body 2, and the small arc-shaped contours 32 are distributed between the large arc-shaped contours 31.

[0026] The through hole includes a tension screw mounting hole 33 and a lifting hole 34. The tension screw mounting hole 33 and the lifting hole 34 are provided on the large arc contour 31, and the tension screw mounting hole 33 is provided on the small arc contour 32.

[0027] The leaf groove area 4 is provided with small leaf grooves 41 and large leaf grooves 42. The small leaf grooves 41 and large leaf grooves 42 are radially distributed with the center of the end plate body 2 as the center. The small leaf grooves 41 are distributed on the inner side and the large leaf grooves 42 are distributed on the outer side.

[0028] The base 1 has a support plate 11 at its bottom and several reinforcing ribs 12 inside the base 1. The top of the base 1 is an arc groove 13. The end plate body 2 is set in the arc groove 13 and is welded and fixed to the reinforcing ribs 12 of the base 1 by a small arc contour 32 and to the arc groove 13 of the base 1 by a circumferential contour 5.

[0029] The small arc-shaped contour 32 located in the arc-shaped groove 13 corresponds one-to-one with the reinforcing rib 12, and the contact point between the small arc-shaped contour 32 and the reinforcing rib 12 is set as a welding point.

[0030] Example 1

[0031] The lightweight end plate for alkaline electrolyzers proposed in this embodiment is designed as follows:

[0032] 1) Based on the data conditions of the original end plate, define the material, boundary conditions and stress loads of the original end plate.

[0033] 2) Referring to the data conditions of the original end plate, input the data into the process simulation software for simulation analysis, define the material properties, stress magnitude, stress surface and stress direction and other parameters to obtain the performance parameters of the original end plate.

[0034] 3) Based on the performance parameters of the original end plate, define the performance requirements related to stress and mass reduction, and thus establish a new model.

[0035] 4) The new model is simulated and analyzed using process simulation software. The performance parameters of the new model are extracted and compared with the performance parameters of the original end plate to verify whether the performance parameters of the new model meet the requirements and to determine the final optimized new end plate structure.

[0036] The new end plate structure includes a base 1 and an end plate body 2. The end plate body 2 has an arc-shaped profile distributed along the circumference. There are two types of arc-shaped profiles: one is a large arc-shaped profile 31 with extension screw mounting holes 33 and lifting holes 34, and the other is a small arc-shaped profile 32 with only extension screw mounting holes 33.

[0037] Among them, there are 4 large arc-shaped contours 31 with lifting holes and tension screw mounting holes, and 8 small arc-shaped contours 32 with only tension screw mounting holes.

[0038] The end plate body 2 has 16 through holes (including extension screw mounting holes 33 and lifting holes 34), and the included angle between the center lines of each through hole is 22.5 degrees.

[0039] The center-line distance between the two large arc-shaped contours 31 in the upper half of the end plate body 2 is 112.5°, and the large arc-shaped contours 31 in the upper half and lower half are symmetrically distributed. The center-line distance between the small arc-shaped contours 32 is 22.5°, and the center-line distance between the small arc-shaped contours 32 and the large arc-shaped contours 31 is 33.75°.

[0040] The base 1 and the end plate body 2 are connected by welding. The cutting depth of the four small arc-shaped contours 32 in the lower part of the end plate is 70mm. There are three reinforcing ribs 12 on the base 1, which are welded to the small arc-shaped contours 32. The center distance between the reinforcing ribs 12 is 276mm.

[0041] The end plate body 2 has two different sizes of leaf grooves distributed on it. There are 6 small leaf grooves 41, and the center line distance between two small leaf grooves 41 is 60° and they are evenly distributed. There are 12 large leaf grooves 42, and the center line distance between two large leaf grooves 42 is 30° and they are evenly distributed. The grooves are provided with R35 rounded corners.

[0042] In this document, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", and "horizontal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of clarifying the technical solution and for the convenience of description, and therefore should not be construed as limiting the present utility model.

[0043] In this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lightweight end plate for an alkaline electrolytic cell, comprising a base (1) and an end plate body (2) welded to the base (1); characterized in that, The end plate body (2) is provided with a lightweight structure, which includes a number of arc-shaped contours (3) distributed along the circumference of the end plate body (2), a number of through holes opened on the arc-shaped contours (3), and a leaf groove area (4) set in the middle of the end plate body (2). The bottom of the end plate body (2) is provided with a circumferential contour (5), and is fixedly connected to the base (1) through the arc-shaped contours (3) and the circumferential contours (5).

2. The lightweight end plate for an alkaline electrolytic cell according to claim 1, characterized in that, The arc-shaped profile (3) includes a large arc-shaped profile (31) and a small arc-shaped profile (32). Several large arc-shaped profiles (31) are evenly distributed on the circumferential surface of the end plate body (2), and the small arc-shaped profiles (32) are distributed between the large arc-shaped profiles (31).

3. The lightweight end plate for an alkaline electrolytic cell according to claim 2, characterized in that, The through hole includes a tension screw mounting hole (33) and a lifting hole (34). The tension screw mounting hole (33) and the lifting hole (34) are provided on the large arc contour (31), and the tension screw mounting hole (33) is provided on the small arc contour (32).

4. The lightweight end plate for an alkaline electrolytic cell according to claim 1, characterized in that, The leaf groove area (4) is provided with small leaf grooves (41) and large leaf grooves (42). The small leaf grooves (41) and large leaf grooves (42) are radially distributed with the center of the end plate body (2) as the center. The small leaf grooves (41) are distributed on the inner side and the large leaf grooves (42) are distributed on the outer side.

5. The lightweight end plate for an alkaline electrolytic cell according to claim 1, characterized in that, The base (1) has a support plate (11) at the bottom and several reinforcing ribs (12) inside the base (1). The top of the base (1) is an arc groove (13). The end plate body (2) is set in the arc groove (13) and is welded and fixed to the reinforcing ribs (12) of the base (1) by a small arc contour (32) and to the arc groove (13) by a circumferential contour (5).

6. The lightweight end plate for an alkaline electrolytic cell according to claim 5, characterized in that, The small arc-shaped contour (32) located in the arc-shaped groove (13) corresponds one-to-one with the reinforcing rib (12), and the contact point between the small arc-shaped contour (32) and the reinforcing rib (12) is set as a welding point.

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