Anti-corrosion pole frame structure

Abstract

The utility model relates to an anti-corrosion pole frame structure which comprises a pole frame main body and a block body, and a notch groove is formed in the pole frame main body; a confluence hole and a confluence channel are arranged on the block body, the confluence hole penetrates through two opposite surfaces of the block body, the confluence channel is arranged on one surface of the block body, one end of the confluence channel is communicated with the confluence hole, and at least the confluence hole and the surface of the block body around the confluence channel are coated with anticorrosive coatings. And the electrode frame is fixed in the notch groove of the electrode frame main body. The anti-corrosion material is sprayed on the block body to form the anti-corrosion layer with excellent comprehensive performance, so that the problem of corrosion of an alkali liquor flow port can be solved; meanwhile, the pole frame main body is not subjected to preservative treatment, so that the cost is reduced, and the conductivity of the pole plate part cannot be reduced to influence the energy consumption of hydrogen production; the whole pole frame is simple in structure and convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production by electrolysis of water, and in particular to an anti-corrosion pole frame structure. Background Art

[0002] In the equipment for producing hydrogen by electrolysis of water with alkaline solution, the pole frame and the pole plate are important components in the electrolyzer. The structure of the pole frame can be referred to in the present application. Figure 1 , and a production process of an electrolytic cell electrolytic chamber structure and a sealing gasket with publication number CN117845246A Figure 5 , and a pole frame assembly structure for an alkaline water hydrogen production electrolyzer with publication number CN220812637U Figure 3 shown.

[0003] The material of the pole frame and pole plate is usually stainless steel with nickel plating on the surface. However, due to the complex structure and thin nickel plating layer at the alkali solution outlet of the pole frame, the alkali solution outlet is severely corroded under long-term erosion and wear of the alkali solution. A large range of corrosion penetration will further cause hydrogen and oxygen to cross each other on both sides of the pole plate, bringing about the problem of hydrogen production safety. Therefore, the corrosion of the pole frame leads to a significant reduction in the service life of the electrolyzer.

[0004] Polyphenylene sulfide, referred to as PPS, has excellent high temperature resistance, corrosion resistance, physical and mechanical properties, excellent dimensional stability and excellent electrical properties. It can be made into various functional films, coatings and composite materials, and has been successfully applied in the fields of electronics, aerospace, automobile transportation, etc. Therefore, through PPS electrostatic spraying or liquid spraying technology, a PPS coating with excellent comprehensive performance can be obtained to solve the corrosion problem of the alkali liquid flow outlet. However, if the pole frame and pole plate are sprayed with PPS as a whole, on the one hand, the cost of spraying is high, and on the other hand, the conductivity of the pole plate part will be significantly reduced, thereby affecting the energy consumption of hydrogen production. Summary of the invention

[0005] The utility model aims to provide a pole frame structure, in particular an anti-corrosion pole frame structure, to solve the corrosion problem of alkali liquid outlet.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An anti-corrosion pole frame structure, comprising:

[0008] A pole frame body, wherein a notch groove is formed on the pole frame body;

[0009] A block, wherein the block is provided with a confluence hole and a confluence channel, wherein the confluence hole passes through two opposite sides of the block, wherein the confluence channel is provided on one side of the block, and one end of the confluence channel is connected with the confluence hole, wherein at least the block surface around the confluence hole and the confluence channel has an anti-corrosion layer, which is fixed in the notch groove of the pole frame body.

[0010] Preferably, in the above technical solution, the notch groove forms an opening at the edge of the pole frame body and extends toward the middle of the pole frame body to form a groove bottom, that is, the notch groove is a groove body extending from the edge to the middle of the pole frame body.

[0011] Further preferably, the block is welded and fixed to the opening of the notch, and the portion where the block is welded to the notch does not have the anti-corrosion layer. This reduces the use area of ​​the anti-corrosion layer and reduces costs on the one hand, and also enhances the stability of the welding between the two on the other hand.

[0012] Further preferably, the block and the bottom of the notch groove are overlapped by step surfaces, and the step surface of the block and the confluence channel are respectively located on two opposite sides of the block. Since the pole frame and the pole plate must prevent the occurrence of hydrogen and oxygen mutual crosstalk, simply assembling the pole frame body and the block has poor sealing performance. If the design is unreasonable, it will lead to the occurrence of hydrogen and oxygen mutual crosstalk on both sides of the pole frame. The step surfaces are overlapped and pressed against each other, and most of the alkali liquid containing hydrogen or oxygen will flow away from the confluence hole.

[0013] More preferably, a sealing tape is laid on the step surface of the block and on both sides thereof. By laying the sealing tape and then overlapping the step surfaces and then applying a certain pressure, the sealing between the two can be enhanced.

[0014] Still more preferably, the thickness of the sealing tape is 50-100 um.

[0015] Still more preferably, the sealing tape is made of PTFE.

[0016] More preferably, a sealing sheet is provided at the overlapping gap between the block and the notch groove. In the ALK alkaline electrolytic cell, a sealing sheet is provided between two adjacent pole frames to seal the alkali solution in the system to ensure that the alkali solution does not leak out from between the pole frames. The present application provides a sealing sheet at the overlapping gap to seal the gap around the step surface of the notch groove to prevent the leakage of alkali solution and the occurrence of hydrogen and oxygen mutual cross-talk on both sides of the pole frame.

[0017] Still more preferably, the sealing sheet is made of polytetrafluoroethylene.

[0018] Further preferably, the notch groove is elliptical, square, trapezoidal, or arc-shaped, and the trapezoidal shape is a trapezoid that gradually expands from the notch groove opening to both sides of the groove bottom, or a trapezoid that gradually decreases from the notch groove opening to both sides of the groove bottom.

[0019] Further preferably, the block is inserted into the notch groove from the opening of the notch groove, and the insertion installation does not require high dimensional accuracy of the components, and even a slight deviation will not affect the installation.

[0020] Further preferably, the block is directly embedded into the notch groove, and the embedded installation has no risk of falling off and the connection is relatively stable.

[0021] Preferably, in the above technical solution, the surface of the block has a groove, a plurality of protrusions are arranged in the groove, and the confluence channel is formed between two adjacent protrusions.

[0022] Preferably, in the above technical scheme, the material of the block is stainless steel or carbon steel; and / or the material of the anti-corrosion layer includes any one of polytetrafluoroethylene, perfluoroethylene propylene copolymer, polyperfluoroalkoxy resin, polychlorotrifluoroethylene, ethylene-chlorotrifluoroethylene copolymer, ethylene-tetrafluoroethylene copolymer, polyvinylidene fluoride, polyvinyl fluoride, polyetheretherketone, polyimide, polyamideimide, polyethersulfone, polysulfone, polyphenylene sulfone, polyphenylene sulfide, polyketone, silicone, epoxy resin, phenolic resin, and polyurethane.

[0023] Preferably, in the above technical solution, the pole frame body is made of stainless steel or stainless steel with nickel plating on the surface; and the surface of the pole frame body does not have the anti-corrosion layer.

[0024] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0025] The utility model forms a layer of anti-corrosion material on the block to form an anti-corrosion layer with excellent comprehensive performance, which can solve the corrosion problem of the alkali solution flow outlet; at the same time, no anti-corrosion treatment is required on the pole frame body, which reduces the cost and does not reduce the conductivity of the pole plate part to affect the energy consumption of hydrogen production; the entire pole frame has a simple structure and is easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 It is a schematic diagram of the structure of the pole frame in the prior art (the middle is the pole plate, and the circle on the edge is the pole frame body);

[0027] Attached Figure 2 It is a schematic diagram of the disassembly of the pole frame structure of the first embodiment;

[0028] Attached Figure 3 It is a schematic diagram of the disassembly of the pole frame structure of the second embodiment;

[0029] Attached Figure 4 It is a schematic diagram of the disassembly of the pole frame structure of the third embodiment;

[0030] Attached Figure 5 It is a schematic diagram of the disassembly of the pole frame structure of the fourth embodiment.

[0031] In the above attached figure:

[0032] 1. pole frame body; 10. notch groove; 100. opening; 101. groove bottom; 102. step surface;

[0033] 2. Block; 20. Confluence hole; 21. Confluence channel; 210. Groove; 211. Protrusion; 22. Anti-corrosion layer; 23. Step surface.

[0034] 3. Pole frame body; 30. Confluence hole; 31. Confluence channel. DETAILED DESCRIPTION

[0035] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] like Figure 2-5 The anti-corrosion pole frame structure shown includes a pole frame body 1 and a block 2. The pole frame structure is formed by assembling the pole frame body 1 and the block 2. Specifically:

[0038] The pole frame body 1 is provided with a notch groove 10, which can be elliptical, square, trapezoidal, or arc-shaped. In this embodiment, the notch groove 10 forms an opening 100 at the edge of the pole frame body 1 and extends to the middle of the pole frame body 1 to form a groove bottom 101, that is, the notch groove 10 is a groove body extending from the edge to the middle of the pole frame body 1.

[0039] The material of the pole frame body 1 can be stainless steel, or stainless steel with nickel plating on the surface, but the surface of the pole frame body 1 does not have an anti-corrosion layer made of soluble fluoroplastics or polyphenylene sulfide.

[0040] The shape of the block 2 completely matches the shape of the notch groove 10, so that the block 2 can be installed in the notch groove 10 of the pole frame body 1. The block 2 is provided with a confluence hole 20 and a confluence channel 21, wherein the confluence hole 20 and the confluence channel 21 are used to flow through the alkali solution. Specifically: the confluence hole 20 runs through two opposite sides of the block 2, the confluence channel 21 is provided on one side of the block 2, and one end of the confluence channel 21 is connected to the confluence hole 20. In this embodiment: the surface of the block 2 has a groove 210, and a plurality of protrusions 211 are provided in the groove 210, and a confluence channel 21 is formed between two adjacent protrusions 211, and a plurality of confluence channels 21 are provided in the figure.

[0041] The material of the block 2 can be stainless steel or carbon steel. However, since the confluence holes 20 and the confluence channels 21 need to flow through the alkali solution, at least the surface around the confluence holes 20 and the confluence channels 21 on the block 2 is coated with an anti-corrosion layer 22. The material of the anti-corrosion layer 22 can be polytetrafluoroethylene, perfluoroethylene propylene copolymer, polyperfluoroalkoxy resin, polytrifluorochloroethylene, ethylene-trifluorochloroethylene copolymer, ethylene-tetrafluoroethylene copolymer, polyvinylidene fluoride, polyvinyl fluoride, polyetheretherketone, polyimide, polyamideimide, polyethersulfone, polysulfone, polyphenylene sulfide, polyketone, silicone, epoxy resin, phenolic resin, polyurethane as the main anti-corrosion component, used to prevent the corrosion of high-temperature alkali solution, the anti-corrosion layer can be processed onto the block 2 by electrostatic spraying, liquid spraying, coating, molding, or injection molding technology, and the part where the block 2 is welded to the notch groove 10 does not need to be coated with the anti-corrosion layer 22.

[0042] According to different shapes, the block 2 can be inserted into the notch groove 10 from the opening 100 of the notch groove 10, or the block 2 can be directly embedded in the notch groove 10. After installation, the block 2 is welded and fixed to the opening of the notch groove 10. Since the portion where the block 2 is welded to the notch groove 10 is not coated with the anti-corrosion layer 22, on the one hand, the coating area of ​​the anti-corrosion layer 22 is reduced to reduce costs, and on the other hand, the stability of the welding between the two is enhanced.

[0043] In a preferred implementation of this embodiment: the block 2 and the groove bottom of the notch groove 10 are overlapped by step surfaces 102 and 23 respectively, and the step surface 23 of the block 2 and the confluence channel 21 are respectively located on two opposite sides of the block 2. Since the pole frame and the pole plate must prevent the occurrence of hydrogen and oxygen cross-talk, simply assembling the pole frame body 1 and the block 2 has poor sealing performance. If the design is unreasonable, it will cause the occurrence of hydrogen and oxygen cross-talk on both sides of the pole frame. Through the overlapping and pressing of the step surfaces 102 and 23, most of the alkali liquid containing hydrogen or oxygen will flow away from the confluence hole 20.

[0044] In addition, the overlapping parts of the step surfaces 102 and 23 of the block 2 and the notch groove 10 are further sealed.

[0045] A sealing tape (not shown) is laid on the step surface 23 of the block 2 and on both sides thereof, the thickness of the sealing tape is 50-100 um, and the material of the sealing tape can be PTFE. By laying the sealing tape and then overlapping the step surfaces 102 and 23, and then applying a certain pressure, the sealing between the two can be strengthened.

[0046] A sealing sheet (not shown in the figure) is provided at the overlapped gap between the block 2 and the notch groove 10, and the material of the sealing sheet can be polytetrafluoroethylene. In the ALK alkaline electrolyzer, a sealing sheet is provided between two adjacent pole frames to seal the alkali solution in the system to ensure that the alkali solution does not leak out from between the pole frames. In this embodiment, a sealing sheet is provided at the overlapped gap to seal the gap around the step surface of the notch groove to prevent the alkali solution from leaking out and the occurrence of hydrogen and oxygen cross-talk between the two sides of the pole frame.

[0047] Embodiment 1:

[0048] like Figure 2 As shown: In this embodiment: the notch groove 10 and the block 2 are both elliptical. The area of ​​the anti-corrosion layer 22 coated in this embodiment is the smallest, and theoretically the coating cost is the lowest. Since the opening 100 of the elliptical notch groove 10 is small, the block 2 cannot be directly inserted from the opening 100. Therefore, the block 2 of this embodiment can only be embedded in the notch groove 10. The embedded installation method has no risk of falling off after installation, but the dimensional accuracy requirements for the notch groove 10 and the block 2 are the highest, and the accuracy requirements for the thickness of the anti-corrosion layer 22 are also high; however, due to the embedded self-locking structure, the block 2 is not easy to fall off from the notch groove 10.

[0049] Embodiment 2:

[0050] like Figure 3As shown: In this embodiment: the notch groove 10 and the block 2 are both trapezoidal, and the notch groove 10 is a trapezoidal shape that gradually expands from the opening 100 to the bottom 101 of the groove. In this embodiment, the area coated with the anti-corrosion layer 22 is the largest, and theoretically the coating cost is the highest. Since the opening 100 of the trapezoidal notch groove 10 is the largest, the block 2 of this embodiment can be inserted into the notch groove 10 from the opening 100. The insertion-type installation method has acceptable requirements for the dimensional accuracy of the notch groove 10 and the block 2, and even if there is a slight deviation, it does not affect the installation; however, the insertion-type installation does not have a self-locking structure. If the welding is not firm, there is a risk that the block 2 will fall off from the notch groove 10 during long-term operation.

[0051] Embodiment three:

[0052] like Figure 4 As shown: this embodiment is basically the same as the first embodiment, except that: in this embodiment: the notch groove 10 and the block 2 are both trapezoidal, and the notch groove 10 is a trapezoidal shape with gradually decreasing sides from the opening 100 to the groove bottom 101.

[0053] Embodiment 4:

[0054] like Figure 5 As shown: this embodiment is basically the same as the second embodiment, except that: in this embodiment: the notch 10 and the block 2 are both square. The area of ​​the anti-corrosion layer 22 coated in this embodiment is between that in the first embodiment and the second embodiment.

[0055] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An anti-corrosion pole frame structure, characterized in that: include: A pole frame body, wherein a notch groove is formed on the pole frame body; A block, wherein the block is provided with a confluence hole and a confluence channel, wherein the confluence hole passes through two opposite sides of the block, wherein the confluence channel is provided on one side of the block, and one end of the confluence channel is connected with the confluence hole, wherein at least the block surface around the confluence hole and the confluence channel has an anti-corrosion layer, which is fixed in the notch groove of the pole frame body.

2. The anti-corrosion pole frame structure according to claim 1, characterized in that: The notch groove forms an opening at the edge of the pole frame body and extends toward the middle of the pole frame body to form a groove bottom.

3. The anti-corrosion pole frame structure according to claim 2, characterized in that: The block is fixedly welded to the opening of the notch, and the portion where the block is welded to the notch does not have the anti-corrosion layer.

4. The anti-corrosion pole frame structure according to claim 2, characterized in that: The block and the groove bottom of the notch groove are overlapped by step surfaces respectively, and the step surface of the block and the confluence channel are respectively located on two opposite sides of the block.

5. The anti-corrosion pole frame structure according to claim 4, characterized in that: Sealing tape is laid on the step surface of the block and on both sides thereof. The thickness of the sealing tape is 50-100um; the material of the sealing tape is PTFE.

6. The anti-corrosion pole frame structure according to claim 4, characterized in that: A sealing sheet is arranged at the overlapped gap between the block and the notch groove.

7. The anti-corrosion pole frame structure according to claim 2, characterized in that: The notch groove is elliptical, square, trapezoidal, or arc-shaped. The trapezoidal shape is a trapezoidal shape that gradually expands from the notch groove opening to both sides of the groove bottom, or a trapezoidal shape that gradually decreases from the notch groove opening to both sides of the groove bottom.

8. The anti-corrosion pole frame structure according to claim 2 or 7, characterized in that: The block is inserted into the notch groove from the opening of the notch groove, or the block is directly embedded into the notch groove.

9. The anti-corrosion pole frame structure according to claim 1, characterized in that: The surface of the block is provided with a groove, a plurality of protrusions are arranged in the groove, and the confluence channel is formed between two adjacent protrusions.

10. The anti-corrosion pole frame structure according to claim 1, characterized in that: The material of the block is stainless steel or carbon steel; and / or the material of the anti-corrosion layer includes any one of polytetrafluoroethylene, perfluoroethylene propylene copolymer, polyperfluoroalkoxy resin, polychlorotrifluoroethylene, ethylene-chlorotrifluoroethylene copolymer, ethylene-tetrafluoroethylene copolymer, polyvinylidene fluoride, polyvinyl fluoride, polyetheretherketone, polyimide, polyamideimide, polyethersulfone, polysulfone, polyphenylene sulfone, polyphenylene sulfide, polyketone, silicone, epoxy resin, phenolic resin, and polyurethane; The material of the pole frame body is stainless steel, or stainless steel with nickel plating on the surface; the surface of the pole frame body is not coated with the anti-corrosion layer.

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