Splicing type electrolytic bath pole frame

Abstract

The utility model relates to the technical field of electrolytic baths, and provides a spliced electrolytic bath pole frame which comprises a first frame, a second frame and a stainless steel bipolar plate, the first frame and the second frame are respectively made of plastic materials. A rectangular opening is formed in the middle of the first frame; the two sides of the front face of the first frame are each provided with a flow channel, and the flow channels communicate with the rectangular opening. A positioning groove is formed in the reverse side of the first frame; the second frame and the first frame are the same in structure, the second frame and the first frame are symmetrically arranged on the two sides of the stainless steel bipolar plate, and the stainless steel bipolar plate is located in the positioning grooves of the first frame and the second frame. According to the utility model, the cost and the assembly process of the electrolytic bath pole frame can be reduced, the insulation effect is improved, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic cells, in particular to a spliced ​​electrolytic cell pole frame. Background Art

[0002] The promotion and application of hydrogen in energy storage, chemical engineering, metallurgy, distributed power generation, and other fields has become an effective way to control greenhouse gas emissions and mitigate global temperature rise. Adhering to the original intention of green hydrogen energy utilization, we will actively develop hydrogen production technologies, represented by water electrolysis, to achieve integrated development with renewable energy.

[0003] As a hydrogen production technology, alkaline water tanks are characterized by their relatively mature technology, which means that they have been widely verified and applied in practice, and have higher reliability and stability compared to other technologies. Mature technology usually means lower R&D costs and faster implementation, which is especially important for applications that require rapid deployment of solutions. Lower cost is another significant advantage of alkaline water tanks. Currently in the market, compared with some higher-cost hydrogen production technologies, alkaline water tanks are more economical in terms of initial investment and operating costs, making them an attractive option for projects or companies with limited budgets. Low cost is not only applicable to small projects, but is also important for large-scale applications, as it can significantly reduce the total cost of ownership and improve the economic benefits of the project. Using hydrogen to replace fossil fuels, some industries with high energy intensity are expected to achieve decarbonization, and hydrogen production through water electrolysis is expected to enable hydrogen to play a key role in the global energy transition process.

[0004] At present, the bipolar square electrolyzer structure model is mainly used as a reference. Its main components include a bracket, support rails are arranged between the brackets, end plates, middle frames, diaphragms, electrodes and sealing gaskets are arranged in the brackets, the middle frame is arranged in the end plates, and the end plates and middle frames are both mounted on the support rails through hanging ears. The end plates on one side of the bracket squeeze the middle frame through the hydraulic plate. The middle frame includes bipolar plates and pole frames, the bipolar plates are arranged in the pole frames, the electrodes are arranged between the bipolar plates, the electrodes include anodes and cathodes, the diaphragms are arranged between the anodes and cathodes, the sealing gaskets are arranged between the pole frames, the inlet and outlet main pipes include a liquid inlet main pipe and a liquid outlet main pipe, and liquid inlets and outlets are opened on the pole frames. The liquid inlets and outlets include the inlet of the alkaline liquid below and the outlet of hydrogen and oxygen above, and each inlet and outlet has a separate pipeline connected to the inlet and outlet main pipe.

[0005] However, the metal pole frame of the bipolar square electrolytic cell requires corrosion-resistant alloy materials or nickel plating, which is relatively expensive; the metal pole frame and bipolar plate need to be welded on both sides, and there are many welding points, which makes welding difficult and greatly increases the probability of problems; alkaline solution is highly corrosive, and the inlet and outlet liquid channels are repeatedly flushed with alkaline solution, and there is a risk of falling off at the welding points and the plating; the metal pole frame needs to be insulated, which greatly increases the safety risk. Utility Model Content

[0006] The utility model mainly solves the technical problems of the existing bipolar square electrolytic cell metal pole frame, such as high cost, large number of welding points, high welding difficulty, and risk of falling off at welding points and plating points. A spliced ​​electrolytic cell pole frame is proposed to reduce the cost and assembly process of the electrolytic cell pole frame, improve the insulation effect, and increase safety.

[0007] The utility model provides a spliced ​​electrolytic cell pole frame, comprising: a first frame, a second frame and a stainless steel bipolar plate;

[0008] The first frame and the second frame are respectively made of plastic materials;

[0009] A rectangular opening is formed in the middle of the first frame; flow channels are respectively provided on both sides of the front surface of the first frame, and the flow channels are connected to the rectangular opening; a positioning groove is provided on the back surface of the first frame;

[0010] The second frame has the same structure as the first frame. The second frame and the first frame are symmetrically arranged on both sides of the stainless steel bipolar plate. The stainless steel bipolar plate is located in the positioning grooves of the first frame and the second frame.

[0011] Preferably, sealing rubbers are respectively provided on the outer sides of the first frame and the second frame, and the sealing rubbers are provided with notches corresponding to the protruding parts of the stainless steel bipolar plates.

[0012] Preferably, the thickness of the sealing rubber is greater than twice the depth of the positioning groove minus the thickness of the stainless steel bipolar plate.

[0013] Preferably, the sunken depth of the positioning groove is 1 / 3 to 1 / 2 of the thickness of the stainless steel bipolar plate.

[0014] Preferably, positioning screw holes are respectively provided at both ends of the first frame and the second frame.

[0015] Preferably, bipolar plate positioning holes and voltage monitoring connection holes are left on the stainless steel bipolar plate.

[0016] Preferably, a pole frame cover is provided on the flow channel.

[0017] Preferably, a circle of rectangular sealing grooves is provided in the positioning groove, and a sealing ring is provided in the sealing groove; the sealing ring is in close contact with the stainless steel bipolar plate.

[0018] Preferably, a liquid inlet is provided on the first frame and the second frame, and a liquid outlet is provided on the other opposite end.

[0019] The utility model provides a spliced ​​electrolytic cell pole frame, which has the following advantages compared with the prior art:

[0020] 1. The spliced ​​plastic pole frame replaces the metal pole frame, which greatly reduces the complexity of the process, reduces the difficulty of welding and reduces costs.

[0021] 2. Through a simple splicing and combination structure, the plastic pole frame itself has good insulation properties, no leakage risk, and no need for insulation treatment, which prevents the adverse effects of leakage current on the electrolytic cell and personal safety, increases safety, and solves the problem of internal and external leakage in the electrolytic cell.

[0022] 3. The utility model has a simple structure, light weight and is easy to assemble and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of the spliced ​​electrolytic cell pole frame provided by the utility model;

[0024] Figure 2 This is a schematic diagram of the back of the spliced ​​electrolytic cell pole frame provided by the utility model;

[0025] Figure 3 It is a schematic diagram of the pole frame cover provided by the utility model;

[0026] Figure 4 It is a schematic diagram of the stainless steel bipolar plate provided by the present utility model;

[0027] Figure 5 It is a schematic diagram of the sealing rubber provided by the utility model.

[0028] Figure markings: 1-first positioning groove; 2-first sealing groove; 3-liquid inlet; 4-positioning screw hole; 5-flow channel; 6-bipolar plate positioning hole; 7-voltage monitoring connection hole; 8-sealing rubber; 9-stainless steel bipolar plate; 10-polarity frame cover; 11-rectangular opening; 12-liquid outlet. DETAILED DESCRIPTION

[0029] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, rather than all of its contents.

[0030] like Figure 1-2 As shown, an embodiment of the present invention provides a spliced ​​electrolytic cell pole frame, comprising: a first frame, a second frame and a stainless steel bipolar plate 9.

[0031] The first frame and the second frame are respectively made of plastic materials, are self-insulated, and have no risk of electric leakage.

[0032] A rectangular opening 11 is formed in the middle of the first frame; flow channels 5 are respectively provided on both sides of the front surface of the first frame, and the flow channels 5 are connected to the rectangular opening 11; Figure 3 As shown, a pole frame cover 10 is provided on the flow channel 5 .

[0033] The first and second frames are provided with a liquid inlet 3 and a liquid outlet 12 at the opposite end. The liquid inlet 3 and the liquid outlet 12 are connected to the flow channel 5 for liquid inlet and outlet. The liquid inlet 3 and the liquid outlet 12 can be selected according to actual conditions and can be interchanged.

[0034] A positioning groove 1 is provided on the reverse side of the first frame; the depth of the positioning groove 1 is 1 / 3 to 1 / 2 of the thickness of the stainless steel bipolar plate 9, and the size is just right for the stainless steel bipolar plate 9 to be embedded. A rectangular sealing groove is provided in the positioning groove 1, and a sealing ring is provided in the sealing groove; the sealing ring is in close contact with the stainless steel bipolar plate 9. The present invention injects sealant into the sealing groove, which is in close contact with the edge of the bipolar plate to form a square sealing ring. The sealing groove is designed to have a width and depth that allows the sealant to flow in, ensuring that the sealant fills the sealing groove.

[0035] The second frame has the same structure as the first frame. The second frame and the first frame are symmetrically arranged on both sides of the stainless steel bipolar plate 9. The stainless steel bipolar plate 9 is located in the positioning grooves of the first frame and the second frame. The stainless steel bipolar plate 9 forms an embedded structure within the positioning groove. The first frame and the second frame squeeze the stainless steel bipolar plate 9, and a silicone rubber sealing ring is formed in the middle to form an integral structure. Figure 4 As shown, the stainless steel bipolar plate 9 is provided with a bipolar plate positioning hole 6 and a voltage monitoring connection hole 7 .

[0036] like Figure 5 As shown, sealing rubber 8 is provided on the outer sides of the first frame and the second frame respectively, and the sealing rubber 8 is provided with a notch corresponding to the protruding portion of the stainless steel bipolar plate 9. The sealing rubber 8 is used to increase the thickness formed by the two frames, buffering the situation where the two hard materials of the stainless steel bipolar plate 9 and the frame are not tightly squeezed, and can also be used as a second line of defense to prevent the electrolyte from mixing. The thickness of the sealing rubber 10 is greater than twice the depth of the positioning groove 1 minus the thickness of the stainless steel bipolar plate 9. The utility model plans the depth of the positioning groove and determines the thickness of the corresponding sealing rubber to achieve the expected compression ratio.

[0037] Furthermore, positioning screw holes 4 are provided at each end of the first and second frames. After liquid sealant is poured into the second frame, the second frame is symmetrically placed on the stainless steel bipolar plate 9 through the positioning screw holes 4, forming a monolithic structure with one anode on one side and one cathode on the other. The first frame, stainless steel bipolar plate 9, and second frame are installed in sequence. Once assembly is complete, the screws are tightened. After standing for the sealant to dry, the monolithic structure is formed. When reassembling, this structure remains as a monolithic model, facilitating installation.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications to the technical solutions described in the above embodiments, or equivalent replacement of some or all of the technical features therein, do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spliced ​​electrolytic cell pole frame, characterized in that: include: A first frame, a second frame and a stainless steel bipolar plate (9); The first frame and the second frame are respectively made of plastic materials; A rectangular opening (11) is formed in the middle of the first frame; flow channels (5) are respectively provided on both sides of the front surface of the first frame, and the flow channels (5) are connected to the rectangular opening (11); a positioning groove (1) is provided on the back surface of the first frame; The second frame has the same structure as the first frame, and the second frame and the first frame are symmetrically arranged on both sides of the stainless steel bipolar plate (9), and the stainless steel bipolar plate (9) is located in the positioning grooves of the first frame and the second frame.

2. The spliced ​​electrolytic cell pole frame according to claim 1, characterized in that: Sealing rubbers (8) are respectively provided on the outer sides of the first frame and the second frame, and the sealing rubbers (8) are provided with notches corresponding to the protruding parts of the stainless steel bipolar plates (9).

3. The spliced ​​electrolytic cell pole frame according to claim 2, characterized in that: The thickness of the sealing rubber (8) is greater than twice the depth of the positioning groove (1) minus the thickness of the stainless steel bipolar plate (9).

4. The spliced ​​electrolytic cell pole frame according to claim 1 or 3, characterized in that: The sunken depth of the positioning groove (1) is 1 / 3 to 1 / 2 of the thickness of the stainless steel bipolar plate (9).

5. The spliced ​​electrolytic cell pole frame according to claim 1, characterized in that: Positioning screw holes (4) are respectively provided at both ends of the first frame and the second frame.

6. The spliced ​​electrolytic cell pole frame according to claim 1, characterized in that: The stainless steel bipolar plate (9) is provided with a bipolar plate positioning hole (6) and a voltage monitoring connection hole (7).

7. The spliced ​​electrolytic cell pole frame according to claim 1, characterized in that: A pole frame cover (10) is provided on the flow channel (5).

8. The spliced ​​electrolytic cell pole frame according to claim 1, characterized in that: A rectangular sealing groove is provided in the positioning groove (1), and a sealing ring is provided in the sealing groove; the sealing ring is in close contact with the stainless steel bipolar plate (9).

9. The spliced ​​electrolytic cell pole frame according to claim 1, characterized in that: A liquid inlet (3) is provided on the first frame and the second frame, and a liquid outlet (12) is provided at the other opposite end.

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