Modular electrolysis unit with composite pole frame

Abstract

The present invention discloses a modular electrolysis unit with a composite material pole frame, which relates to the field of alkaline water electrolysis hydrogen production. The unit comprises a metal exoskeleton, the metal exoskeleton comprising a pressure-bearing metal outer frame and a metal partition, wherein the metal partition is welded to the center of the inner wall of the pressure-bearing metal outer frame. After welding, the interior of the metal exoskeleton forms two concave cavities symmetrically about the metal partition, the concave cavity on either side being designated as the cathode cavity, and the concave cavity on the other side being the anode cavity. The present invention adopts a lightweight metal exoskeleton structure by combining a hydrogen-side resin structure with an oxygen-side resin structure to effectively address the shortcomings of the resin pole frame in terms of insufficient pressure and temperature resistance. The present invention adopts a modular design, designed into unit modules that can be assembled separately, so that the electrolysis unit can be designed as a complete assembly. The modular units can be assembled separately first, and then multiple modular electrolysis units can be assembled together, greatly improving assembly efficiency.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen production by alkaline water electrolysis, and in particular to a modular electrolysis unit with a composite material pole frame. Background Art

[0002] With global warming and the gradual depletion of fossil energy, renewable energy is a global priority, and hydrogen energy, as the preferred carrier of renewable energy, has been vigorously developed. Hydrogen production through water electrolysis is an effective method for producing green hydrogen by coupling renewable energy generation, and has therefore seen significant development in recent years. The electrolyzer, the core component of a water electrolysis hydrogen production system, is determined by the structural characteristics of the electrolysis unit—its basic unit—which determines its performance.

[0003] The vast majority of electrolytic cells currently sold and used on the market feature metal pole frames (mild steel nickel-plated), with only a small number of small electrolytic cells utilizing resin pole frames (materials such as PSU, PES, and PEEK). Metal pole frames have the disadvantages of long processing cycles, high costs, and heavy weight. The resulting electrolytic cells exhibit low current efficiency, low gas purity, and are relatively bulky. While resin pole frames avoid the drawbacks of long processing cycles, high costs, and heavy weight, the resulting electrolytic cells suffer from low pressure resistance (≤1.0 MPa) and low temperature tolerance (≤75°C). This prevents them from achieving the low power consumption goals of operating at high pressures (≥1.6 MPa) and temperatures (≥90°C). Therefore, resin-frame electrolytic cells are typically reserved for small electrolytic cells (where they offer advantages over pressure resistance).

[0004] In addition, both metal- and resin-frame electrolyzers suffer from a common drawback: the numerous electrolyzer components are fixed to a single workstation from start to finish due to gravity, preventing them from moving. This prevents the deployment of additional personnel and branch production lines to reduce assembly time. After completion, the electrolyzer's position must be adjusted from vertical to horizontal, forcing the components to be assembled in a non-working position (with the component axis perpendicular to the ground), resulting in a cluttered worksite and low efficiency. Furthermore, because the electrolyzer components are discretely locked, the only option is to tighten the end plates with tension screws (tension-type locking). This lack of specialized tooling at user sites hinders on-site assembly and repair, significantly impacting overseas sales. Summary of the Invention

[0005] The main purpose of the present invention is to provide a modular electrolysis unit with a composite material pole frame, which can effectively solve the problems existing in the background technology:

[0006] (1) Metal pole frames have a long processing cycle, high cost, and heavy weight. The electrolytic cells assembled from them have the disadvantages of low current efficiency, low gas purity, and are relatively bulky. Although resin pole frames avoid the disadvantages of long processing cycles, high costs, and heavy weight, the electrolytic cells assembled from them have the disadvantages of low pressure resistance and low temperature tolerance, which makes it impossible to achieve the goal of low power consumption by using high operating pressure and high temperature.

[0007] (2) There are many components in the electrolytic cell. Due to the influence of gravity, the components can only be assembled in a non-working posture (the axis of the component is perpendicular to the ground), which makes it impossible to carry out the work on site and reduces efficiency.

[0008] (3) Since the only option for the scattered locking of the electrolytic cell components is to use a tightening screw to tighten the pressure plates on both sides to lock the electrolytic cell (tension locking), the user's site lacks special tooling, resulting in the disadvantage of not supporting user-site assembly and maintenance.

[0009] To achieve the above object, the technical solution adopted by the present invention is:

[0010] A modular electrolytic cell with a composite material pole frame includes a metal exoskeleton, wherein the metal exoskeleton includes a pressure-bearing metal outer frame and a metal separator, and the metal separator is welded to the center of the inner wall of the pressure-bearing metal outer frame. After welding, two concave cavities are formed symmetrically about the metal separator inside the metal exoskeleton. The concave cavity on either side is named the cathode cavity, and the concave cavity on the other side is the anode cavity.

[0011] Six fixing screw seats are welded on both sides of the metal partition in a centrally symmetrical manner about the center of the metal partition;

[0012] An oxygen-side resin structure is sleeved in the anode cavity, an anode support plate is sleeved inside the oxygen-side resin structure, and an anode plate is arranged outside the oxygen-side resin structure and the anode support plate;

[0013] A hydrogen side resin structure is sleeved in the cathode cavity, a cathode support plate is sleeved inside the hydrogen side resin structure, and a cathode plate is arranged outside the hydrogen side resin structure and the cathode support plate;

[0014] The surfaces of the anode plate and the cathode plate are both provided with six countersunk holes symmetrically about the center of the circle, and the six countersunk holes correspond one to one with the positions of the six fixing screw seats. Fixing screws are provided in the six countersunk holes, and the fixing screws are threadedly connected to the fixing screw seats.

[0015] Furthermore, the pressure-bearing metal outer frame is a circular ring structure, the metal partition is a circular structure, and the surface of the metal outer frame is nickel-plated.

[0016] Furthermore, the oxygen side resin structure as a whole is a disc-shaped structure, and the upper end of one side of the line connecting the upper and lower quadrant points of the oxygen side resin structure is fixedly installed with an oxygen side gas-liquid outlet, and the lower end of one side of the line connecting the upper and lower quadrant points of the oxygen side resin structure is fixedly installed with an oxygen side liquid inlet, and the central axis of the oxygen side liquid inlet and the oxygen side gas-liquid outlet are located on the same straight line.

[0017] Furthermore, the hydrogen side resin structure is a disc-shaped structure as a whole, and a hydrogen side gas-liquid outlet is fixedly installed at the upper end of one side of the line connecting the upper and lower quadrant points of the hydrogen side resin structure, and a hydrogen side liquid inlet is fixedly installed at the lower end of one side of the line connecting the upper and lower quadrant points of the oxygen side resin structure, and the central axis of the hydrogen side liquid inlet and the hydrogen side gas-liquid outlet are located on the same straight line.

[0018] Furthermore, a truncated cone is provided on one side of the hydrogen-side resin structure and the oxygen-side resin structure, and the cathode plate is located in the truncated cone of the hydrogen-side resin structure, and the anode plate is located in the truncated cone of the oxygen-side resin structure.

[0019] Furthermore, two hydrogen side U-shaped mounting grooves are provided on one side of the line connecting the upper and lower quadrant points of the pressure-bearing metal outer frame, and two oxygen side U-shaped mounting grooves are provided on the other side of the line connecting the upper and lower quadrant points of the pressure-bearing metal outer frame.

[0020] Furthermore, the hydrogen side liquid inlet and the hydrogen side gas-liquid outlet are respectively located in two hydrogen side U-shaped mounting grooves, and the oxygen side liquid inlet and the oxygen side gas-liquid outlet are respectively located in two oxygen side U-shaped mounting grooves.

[0021] Furthermore, two concentrically arranged sealing grooves are provided on one side of the hydrogen-side resin structure and the oxygen-side resin structure, and sealing members are provided in the four sealing grooves.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention adopts a lightweight metal exoskeleton structure by combining the hydrogen-side resin structure and the oxygen-side resin structure. On the one hand, it can effectively solve the disadvantages of low current efficiency, low gas purity, and relatively heavy weight of the electrolytic cell assembled with metal pole frames. On the other hand, it can also effectively solve the shortcomings of insufficient pressure and temperature resistance of the resin pole frames.

[0024] 2. The present invention adopts a modular design, designing the hydrogen-side resin structure, oxygen-side resin structure, cathode plate, anode plate, cathode support plate, and anode support plate into unit modules that can be assembled separately, so as to realize the design of the electrolysis unit as a complete assembly. The modular units can be assembled separately first, and then multiple modular electrolysis units can be assembled together, greatly improving the assembly efficiency;

[0025] 3. The modular electrolytic unit structure adopted in the present invention can support the assembly of the component axis parallel to the ground in the working posture, which satisfies the top-tightening locking method, that is, the tension-type locking method is improved to the top-tightening locking method, which can better support on-site assembly and maintenance and replacement of electrolytic units.

[0026] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A side view of a modular electrolytic unit with a composite pole frame according to the present invention;

[0028] Figure 2 The modular electrolytic unit of the composite material pole frame of the present invention Figure 1 Cross-sectional view of AA;

[0029] Figure 3 The modular electrolytic unit of the composite material pole frame of the present invention Figure 1 Cross-sectional view of the middle BB;

[0030] Figure 4 The modular electrolytic unit of the composite material pole frame of the present invention Figure 1 Cross-sectional view of CC;

[0031] Figure 5 An enlarged view of the metal exoskeleton of the modular electrolytic unit of the composite pole frame of the present invention;

[0032] Figure 6 A partial cross-sectional view of the metal exoskeleton of a modular electrolytic unit of a composite pole frame according to the present invention;

[0033] Figure 7 An enlarged view of the hydrogen-side resin structure of the modular electrolytic unit of the composite pole frame of the present invention;

[0034] Figure 8 A schematic diagram of the tension-type locking method of the modular electrolytic unit of the composite material pole frame of the present invention;

[0035] Figure 9 A schematic diagram of the top-tightening locking method of the modular electrolytic unit of the composite material pole frame of the present invention;

[0036] Figure 10 A schematic diagram of the assembly process of a conventional electrolytic cell for a modular electrolytic unit having a composite material pole frame according to the present invention;

[0037] Figure 11 A schematic diagram of the electrolytic cell assembly process of the modular electrolytic unit of the composite material pole frame of the present invention;

[0038] In the figure: 1. Metal exoskeleton; 1-1. Pressure-bearing metal outer frame; 1-2. Metal partition; 2. Hydrogen side resin structure; 2-1. Hydrogen side liquid inlet; 2-2. Hydrogen side gas-liquid outlet; 3. Oxygen side resin structure; 3-1. Oxygen side liquid inlet; 3-2. Oxygen side gas-liquid outlet; 4. Cathode plate; 5. Anode plate; 6. Cathode support plate; 7. Anode support plate; 8. Sealing element; 9. Fixing screw; 10. Fixing screw seat; 11. Hydrogen side U-shaped mounting groove; 12. Oxygen side U-shaped mounting groove; 13. Cone; 14. Sealing groove. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0040] like Figure 1-Figure 7 As shown, a modular electrolytic unit of a composite pole frame includes a metal exoskeleton 1, which includes a pressure-bearing metal outer frame 1-1 and a metal separator 1-2, and the metal separator 1-2 is welded to the center of the inner wall of the pressure-bearing metal outer frame 1-1. After welding, the interior of the metal exoskeleton 1 is symmetrically formed with respect to the metal separator 1-2 to form two concave cavities, the concave cavity on either side is named the cathode cavity, and the concave cavity on the other side is the anode cavity;

[0041] Six fixing screw seats 10 are welded on both sides of the metal partition 1-2 in a centrally symmetrical manner about the center of the metal partition 1-2;

[0042] The anode cavity is sleeved with an oxygen side resin structure 3, the interior of the oxygen side resin structure 3 is sleeved with an anode support plate 7, and the exterior of the oxygen side resin structure 3 and the anode support plate 7 is provided with an anode plate 5;

[0043] A hydrogen side resin structure 2 is sleeved in the cathode cavity, a cathode support plate 6 is sleeved inside the hydrogen side resin structure 2, and a cathode plate 4 is arranged outside the hydrogen side resin structure 2 and the cathode support plate 6;

[0044] The surfaces of the anode plate 5 and the cathode plate 4 are both provided with six countersunk holes symmetrically about the center of the circle, and the six countersunk holes correspond one to one with the positions of the six fixing screw seats 10. Fixing screws 9 are provided in the six countersunk holes, and the fixing screws 9 are threadedly connected to the fixing screw seats 10.

[0045] In the prior art, due to the scattered locking method of the electrolytic cell components, the only option is to use a tensioning screw to tighten the two side end pressure plates to lock the electrolytic cell (tension locking). Figure 8As shown, the disadvantage of not supporting on-site assembly and maintenance by users due to the lack of special tooling at the user site has a great impact on overseas sales. As an embodiment of the present invention, the modular electrolysis unit structure of the present invention can support the assembly of the component axis parallel to the ground in the working posture, which also satisfies the top-tightening locking method, that is, improving the tension-type locking method to the top-tightening locking method. Figure 9 As shown, on-site assembly and repair and replacement of electrolysis units can be better supported.

[0046] In order to overcome the shortcomings of metal pole frames and resin pole frames, the present invention combines a metal exoskeleton with a resin structure to construct a pole frame composite material pole frame, that is, the hydrogen side resin structure 2 and the oxygen side resin structure 3 are combined with a thin metal exoskeleton 1 structure.

[0047] like Figure 5-Figure 6 As shown, the pressure-bearing metal outer frame 1-1 is a circular structure, the metal partition 1-2 is a circular structure, and the surface of the metal outer frame body 1 is nickel-plated.

[0048] By calculating and selecting the appropriate thickness for the pressure-bearing metal outer frame 1-1, it can withstand an internal pressure of 1.6 MPa or higher. Increasing the thickness can even increase the pressure. While the resin pole frame, through material selection, can operate stably and long-term below 120°C, its compressive strength decreases after operating temperatures exceed 75°C. A structure that can withstand pressures of 1.6 MPa or higher becomes unreliable as its strength decreases at operating temperatures exceeding 75°C. In this patent application, resin material is used as the hydrogen-side resin structure 2 and the oxygen-side resin structure 3 encased in the metal outer frame 1-1, transferring the pressure from the cavity to the metal outer pole frame. This eliminates the need to raise the operating temperature to 90°C in pursuit of low power consumption.

[0049] like Figure 7 As shown, the oxygen side resin structure 3 is a disc-shaped structure as a whole, and the oxygen side gas-liquid outlet 3-2 is fixedly installed on the upper end of the side of the line connecting the upper and lower quadrant points of the oxygen side resin structure 3, and the oxygen side liquid inlet 3-1 is fixedly installed on the lower end of the side of the line connecting the upper and lower quadrant points of the oxygen side resin structure 3, and the central axis of the oxygen side liquid inlet 3-1 and the oxygen side gas-liquid outlet 3-2 are located on the same straight line; the hydrogen side resin structure 2 is a disc-shaped structure as a whole, and the hydrogen side gas-liquid outlet 2-2 is fixedly installed on the upper end of the side of the line connecting the upper and lower quadrant points of the hydrogen side resin structure 2, and the hydrogen side liquid inlet 2-1 is fixedly installed on the lower end of the side of the line connecting the upper and lower quadrant points of the oxygen side resin structure 3, and the central axis of the hydrogen side liquid inlet 2-1 and the hydrogen side gas-liquid outlet 2-2 are located on the same straight line, and the hydrogen side resin structure 2 has the same shape as the oxygen side resin structure 3.

[0050] The resin materials selected for the hydrogen-side resin structure 2 and the oxygen-side resin structure 3 allow their complex structures to be simplified by injection molding, thus avoiding the lengthy process chain of mechanical processing and reducing processing costs.

[0051] A truncated cone 13 is formed on one side of the hydrogen-side resin structure 2 and the oxygen-side resin structure 3 . The cathode plate 4 is located in the truncated cone 13 of the hydrogen-side resin structure 2 , and the anode plate 5 is located in the truncated cone 13 of the oxygen-side resin structure 3 .

[0052] Two hydrogen side U-shaped mounting grooves 11 are provided on one side of the line connecting the upper and lower quadrant points of the pressure-bearing metal outer frame 1-1, and two oxygen side U-shaped mounting grooves 12 are provided on the other side of the line connecting the upper and lower quadrant points of the pressure-bearing metal outer frame 1-1; the hydrogen side liquid inlet 2-1 and the hydrogen side gas-liquid outlet 2-2 are respectively located in the two hydrogen side U-shaped mounting grooves 11, and the oxygen side liquid inlet 3-1 and the oxygen side gas-liquid outlet 3-2 are respectively located in the two oxygen side U-shaped mounting grooves 12.

[0053] The outer metal pole frame is only responsible for bearing the cavity pressure transmitted from the inner resin pole frame and does not come into contact with the electrolyte in the inner cavity. Therefore, it only needs atmospheric corrosion protection and does not need strong alkali corrosion resistance, which reduces the production cost; the inner resin pole frame is in direct contact with the electrolyte, which can give full play to its material properties of resistance to strong acids and strong alkalis.

[0054] Two concentric sealing grooves 14 are provided on one side of each of the hydrogen-side resin structure 2 and the oxygen-side resin structure 3 , and a sealing member 8 is provided in each of the four sealing grooves 14 .

[0055] The conventional electrolysis unit assembly mode in the prior art is as follows Figure 10 As shown, from the beginning to the completion of assembly, it is fixed in one station and cannot be moved, and it is impossible to invest more personnel and branch production lines to reduce the assembly time. After completion, the electrolytic cell posture needs to be adjusted from vertical to horizontal (transportation and working posture); and the present invention is as follows Figure 11 As shown, it is first assembled into modular units, and multiple assembly branches can be arranged, with flexible site selection. Finally, the overall assembly is arranged according to production needs. After assembly is completed, it is directly in the transportation and working posture. If it is an overseas user, you can also choose customer-site assembly to reduce transportation costs.

[0056] The present invention adopts a modular design, designing the hydrogen-side resin structure 2, the oxygen-side resin structure 3, the cathode plate 4, the anode plate, the cathode support plate 6 and the anode support plate 7 into unit modules that can be assembled separately, so as to realize the design of the electrolysis unit as a complete assembly. The modular units can be assembled separately first, and then multiple modular electrolysis units can be assembled together, which greatly improves the assembly efficiency.

[0057] It should be noted that the present invention is a modular electrolytic unit of a composite material pole frame. When in use, first, when assembling a single modular electrolytic unit, the pressure-bearing metal outer frame 1-1 responsible for bearing the pressure and the metal partition 1-2 responsible for separating the cathode cavity and the anode cavity are welded into a metal outer frame body 1. After welding, the metal outer frame body 1 forms two back-to-back concave cavities on its two sides. Since it is a completely symmetrical structure, any concave cavity can be named as the cathode cavity, and the other side is the anode cavity. The metal outer frame body 1 is then nickel-plated to achieve the effect of corrosion protection against alkaline solution. Next, the fixing screw seat 10 is welded to a specific position of the nickel-plated metal outer frame body 1, and then the four seals 8 are respectively installed on the hydrogen side resin structure 2 and the oxygen side resin structure 3. Then the hydrogen side resin structure 2 is installed in the cathode cavity, and the oxygen side resin structure 3 is installed on the anode cavity, where the hydrogen side liquid inlet 2-1 and the hydrogen side gas-liquid outlet 2-2 of the hydrogen side resin structure 2 are respectively located on the two sides. The oxygen side U-shaped mounting groove 11 is arranged in the oxygen side U-shaped mounting groove 11, and the oxygen side liquid inlet 3-1 and the oxygen side gas-liquid outlet 3-2 of the oxygen side resin structure 3 are respectively located in the two oxygen side U-shaped mounting grooves 12. Then the cathode plate 4 is installed on one side of the cathode support plate 6, and the edge of the cathode plate 4 is located on the truncated cone 13 of the hydrogen side resin structure 2. The anode plate 5 is installed on one side of the anode support plate 7, and the edge of the anode plate 5 is located on the truncated cone 13 of the oxygen side resin structure 3. The two sides are successively installed on the six fixing screw seats 10 with six fixing screws 9. After the above operations, the assembly process of the modular electrolysis unit is completed. The fixing screw seats 10 cooperate with the fixing screws 9 to fix the cathode support plate 6, cathode plate 4 and the anode support plate 7, anode plate 5 on the metal outer frame 1 respectively. The fixed cathode plate 4 and anode plate 5 respectively fix the hydrogen side resin structure 2 and the oxygen side resin structure 3 in the concave cavities on both sides of the metal outer frame 1. From then on, all components form a modular electrolysis unit, which is more practical.

[0058] When in use, multiple electrolysis units involved in this patent are connected in series, with seals between each electrolysis unit, a diaphragm is placed, and two heavy end plates are used to press them together and lock them with screws to form the core component of water electrolysis hydrogen production - the electrolyzer. Figure 11 As shown; the number of electrolytic units connected in series depends on the output of the preset electrolytic cell and the unit gas production capacity of the electrolytic unit; the gas production capacity of the electrolytic unit depends on its area and working current.

[0059] Direct current is introduced into the anode end plate of the electrolytic cell, flows through all the electrolytic units connected in series, reaches the cathode end plate, and then flows back to the power supply. At the same time, electrolyte flows into the hydrogen side inlet 2-1 and oxygen side inlet 3-1 of each electrolytic unit. When the electrolyte flows through the electrode surface, H + At the cathode, it is reduced to H2, while OH -It is oxidized into O2 at the anode, and the generated H2 mixed electrolyte flows out of the hydrogen side gas-liquid outlet 2-2 together, and finally converges into the gas treatment system of the hydrogen production system. The gas-liquid mixed fluid re-enters the circulation after gas-liquid separation; the generated O2 mixed electrolyte flows out of the oxygen side gas-liquid outlet 3-2 together, and finally converges into the gas treatment system of the hydrogen production system. The gas-liquid mixed fluid re-enters the circulation after gas-liquid separation.

[0060] In the structure involved in the present invention, the pressure-bearing metal outer frame 1-1 is responsible for bearing the pressure transmitted from the inner cavity side, and can be designed to have different thicknesses to meet different pressure requirements (1.0MPa, 1.6MPa, 2.5MPa, 3.2MPa, etc.), and cooperates with the metal partition 1-2 to complete the structural function of manufacturing the cavity and separating the hydrogen side cavity and the oxygen side cavity. The processing technology requirements are simple and easy, and the separation effect is safe and reliable (no sealing); the hydrogen side resin structure 2 and the oxygen side resin structure 3 provide high efficiency in the processing technology of the complex frame structure, and are one-time injection molded parts, which greatly reduces the processing cost; the modular structure meets the efficient assembly mode of first assembling a single piece and then assembling multiple pieces; the modular structure supports assembly in a working posture and supports a top-tightening locking method, providing the necessary conditions for meeting the customer's on-site assembly and on-site replacement and maintenance requirements.

[0061] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular electrolytic unit with a composite material pole frame, characterized by: The invention comprises a metal exoskeleton (1), wherein the metal exoskeleton (1) comprises a pressure-bearing metal outer frame (1-1) and a metal partition (1-2), and the metal partition (1-2) is welded to the center of the inner wall of the pressure-bearing metal outer frame (1-1). After welding, the interior of the metal exoskeleton (1) is symmetrically formed with respect to the metal partition (1-2), and the concave cavity on either side is named as the cathode cavity, and the concave cavity on the other side is named as the anode cavity. Six fixing screw seats (10) are welded on both sides of the metal partition (1-2) in a centrally symmetrical manner about the center of the metal partition (1-2); An oxygen-side resin structure (3) is sleeved in the anode cavity, an anode support plate (7) is sleeved inside the oxygen-side resin structure (3), and an anode plate (5) is provided outside the oxygen-side resin structure (3) and the anode support plate (7); A hydrogen-side resin structure (2) is sleeved in the cathode cavity, a cathode support plate (6) is sleeved inside the hydrogen-side resin structure (2), and a cathode plate (4) is provided outside the hydrogen-side resin structure (2) and the cathode support plate (6); The surfaces of the anode plate (5) and the cathode plate (4) are provided with six countersunk holes symmetrically about the center of the circle, and the six countersunk holes correspond to the positions of the six fixing screw seats (10) one by one. A fixing screw (9) is provided in each of the six countersunk holes, and the fixing screw (9) is threadedly connected to the fixing screw seat (10).

2. The modular electrolytic unit with composite pole frame according to claim 1, characterized in that: The pressure-bearing metal outer frame (1-1) is a circular ring structure, the metal partition (1-2) is a circular structure, and the surface of the metal outer frame body (1) is nickel-plated.

3. The modular electrolytic unit with composite pole frame according to claim 1, characterized in that: The oxygen side resin structure (3) is a disc-shaped structure as a whole, and an oxygen side gas-liquid outlet (3-2) is fixedly installed on the upper end of one side of the line connecting the upper and lower quadrant points of the oxygen side resin structure (3), and an oxygen side liquid inlet (3-1) is fixedly installed on the lower end of one side of the line connecting the upper and lower quadrant points of the oxygen side resin structure (3), and the central axis of the oxygen side liquid inlet (3-1) and the oxygen side gas-liquid outlet (3-2) are located on the same straight line.

4. The modular electrolytic unit with composite pole frame according to claim 3, characterized in that: The hydrogen side resin structure (2) is a disc-shaped structure as a whole, and a hydrogen side gas-liquid outlet (2-2) is fixedly installed at the upper end of one side of the line connecting the upper and lower quadrant points of the hydrogen side resin structure (2), and a hydrogen side liquid inlet (2-1) is fixedly installed at the lower end of one side of the line connecting the upper and lower quadrant points of the oxygen side resin structure (3), and the central axis of the hydrogen side liquid inlet (2-1) and the hydrogen side gas-liquid outlet (2-2) are located on the same straight line.

5. The modular electrolytic unit with composite material pole frame according to claim 4, characterized in that: A truncated cone (13) is provided on one side of the hydrogen-side resin structure (2) and the oxygen-side resin structure (3), and the cathode plate (4) is located in the truncated cone (13) of the hydrogen-side resin structure (2), and the anode plate (5) is located in the truncated cone (13) of the oxygen-side resin structure (3).

6. The modular electrolytic unit with composite pole frame according to claim 5, characterized in that: Two hydrogen-side U-shaped mounting grooves (11) are provided on one side of a line connecting the upper and lower quadrant points of the pressure-bearing metal outer frame (1-1), and two oxygen-side U-shaped mounting grooves (12) are provided on the other side of a line connecting the upper and lower quadrant points of the pressure-bearing metal outer frame (1-1).

7. The modular electrolytic unit with composite pole frame according to claim 6, characterized in that: The hydrogen side liquid inlet (2-1) and the hydrogen side gas-liquid outlet (2-2) are respectively located in two hydrogen side U-shaped installation grooves (11), and the oxygen side liquid inlet (3-1) and the oxygen side gas-liquid outlet (3-2) are respectively located in two oxygen side U-shaped installation grooves (12).

8. The modular electrolytic unit with composite pole frame according to claim 2, characterized in that: Two concentrically arranged sealing grooves (14) are provided on one side of each of the hydrogen-side resin structure (2) and the oxygen-side resin structure (3), and sealing members (8) are provided in each of the four sealing grooves (14).

Images