Alkaline water electrolysis device for rapidly, efficiently, and safely scaling up hydrogen production

Abstract

An alkaline water electrolysis device for rapidly, efficiently, and safely scaling up hydrogen production, comprising an alkaline water electrolysis device, a tie rod, a positive electrode end pressure plate / negative electrode end pressure plate, and a disc spring. A bolt is fixedly mounted on the side of the positive electrode end pressure plate / negative electrode end pressure plate close to the disc spring, and a nut is provided on the exterior of the bolt. Alternately arranged bipolar plate assemblies, gaskets, and diaphragms are disposed between the positive electrode end pressure plate and the negative electrode end pressure plate. An electrode frame is provided with a liquid path hole, a gas path hole, a rivet hole, and a positioning hole. A rivet is disposed inside of the rivet hole on the electrode frame, and the rivet comprises a rivet head and a rivet shaft.

Description

An alkaline water electrolysis device for rapid, efficient and safe expansion of hydrogen production Technical Field

[0001] The present invention relates to the technical field of hydrogen production by electrolysis of water, and in particular to alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production. Background Art

[0002] As a hydrogen production technology, alkaline electrolyzers can produce hydrogen by electrolyzing water, and the process of producing hydrogen by electrolysis of water does not produce direct carbon emissions. This makes alkaline electrolyzers a sustainable, low-carbon way to produce hydrogen, which is consistent with the dual carbon goals. By using renewable energy (such as solar energy and wind energy) in the energy supply chain to power alkaline electrolyzers, the carbon emissions of hydrogen production can be further reduced. Therefore, alkaline electrolyzers play an important role in achieving the dual carbon goals and can contribute to energy transformation and carbon emission reduction. Alkaline electrolyzers typically include the following main components,

[0003] (1) Electrode: The electrode is a combination of an anode and a cathode, located inside the electrolytic cell. The anode and cathode are in contact with the electrolyte, and hydrogen and oxygen are produced through electrolysis.

[0004] (2) Diaphragm: The diaphragm is located between the anode and cathode, and is used to isolate gas generation and prevent electrolyte mixing. The separator is usually ion-selective, allowing ions to pass through while preventing electrolyte mixing.

[0005] (3) End pressure plates: End pressure plates are located at both ends of the electrolytic cell and are used to fix and seal the structure of the electrolytic cell. They use screws and nuts to tightly fix the various parts of the electrolytic cell together.

[0006] (4) Electrode frame: The electrode frame is the internal frame structure of the electrolytic cell, surrounding the periphery of the electrolytic cell. The electrode frame usually has gas path holes, liquid path holes, positioning holes, etc. for connecting other components and channels.

[0007] (5) Gasket: The gasket is located between the electrode frame and the electrode, and plays a filling and sealing role to prevent electrolyte leakage. The gasket is usually made of corrosion-resistant material.

[0008] (6) Screws and nuts: Screws and nuts are used to tightly fix the various parts of the electrolytic cell together. They maintain the tight connection of the end pressure plates by applying appropriate pressure, ensuring the stability and sealing of the device.

[0009] (7) Butterfly springs: Butterfly springs are commonly used to adjust and maintain pressure, clearance, or tightness within the electrolytic cell. They play an important role in the assembly of the electrolytic cell, helping to ensure the stability and proper operation of the device.

[0010] With China's vigorous promotion of renewable energy hydrogen production projects, the industry's demand for alkaline electrolyzers is growing, further driving the trend toward larger-scale development. Currently, the primary approach to increasing the hydrogen production capacity of a single electrolyzer is to increase the electrolysis area and the number of chambers. However, this approach increases the size and weight of the electrolyzer, posing significant risks to its structural safety during long-term operation. For example, in an electrolyzer producing 1000 Nm³ / h of hydrogen, the electrode diameter exceeds 2 meters, the cell length exceeds 5 meters, and the overall weight approaches 50 tons. The hundreds of metal electrode plates are physically bonded together without any riveting or interlocking structures; instead, they are physically joined by the transverse tension of screws and bolts. After prolonged operation (e.g., several or even more than a decade), the central region of the electrolyzer tends to sink. Increasing the bolt tensioning pressure can improve the bond between the electrode plates to a certain extent, but this also significantly reduces the life of the gaskets, resulting in a decrease in gasket sealing performance. In severe cases, this can lead to alkaline solution leakage within the electrolyzer, causing safety accidents. In order to reduce this risk, the problem of the sinking of the middle part of the electrolytic cell can be alleviated by adding an external support structure. For example, CN214830709U discloses an integral support for the bottom of a large water electrolytic cell. The invention reduces the probability of the middle area sinking due to the squeezing of the middle area by the electrolytic cell through the supporting effect of the support column plate. However, the support column only applies a reaction force to the electrode plates of the electrolytic cell from the outside, and only acts on certain local electrode plates, and cannot fundamentally solve the problem of the sinking of the middle part of the electrolytic cell caused by the increase in the scale of hydrogen production. For this reason, the present application now proposes an alkaline water electrolysis device that can quickly, efficiently and safely expand the scale of hydrogen production.

[0011] Summary of the Invention

[0012] In response to the shortcomings of the existing technology, the present invention provides an alkaline water electrolysis device that can quickly, efficiently and safely expand the scale of hydrogen production. It has the advantages of rapid and efficient hydrogen production, flexible scale expansion, stable structure, enhanced safety, and improved production efficiency, solving the problems of low efficiency and low safety of existing hydrogen production technologies.

[0013] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an alkaline water electrolysis device for rapidly, efficiently and safely expanding the scale of hydrogen production, comprising an alkaline water electrolysis device and a pull rod, wherein a positive terminal pressure plate is provided at one end of the alkaline water electrolysis device, and a negative terminal pressure plate is provided at the other end of the alkaline water electrolysis device, a butterfly spring is fixedly installed on the left end of the positive terminal pressure plate and the side facing the negative terminal pressure plate, a bolt is fixedly installed on the side of the positive terminal pressure plate close to the butterfly spring, a nut is provided on the outside of the bolt, and an alternating bipolar plate assembly, a pole frame and a gasket are provided between the positive terminal pressure plate and the negative terminal pressure plate.

[0014] The pole frame is provided with a liquid path hole, an air path hole, a rivet hole, and a positioning hole. Rivets are arranged inside the rivet holes provided on the pole frame. The rivets include a rivet head and a rivet shaft.

[0015] Furthermore, the bipolar plate assembly is arranged inside the pole frame, and includes an anode, a pole plate, a cathode, and a diaphragm arranged in sequence.

[0016] The pole frame is made of metal and is conductive, and the surfaces of the anode and cathode contain catalyst materials that are conducive to oxygen evolution and hydrogen evolution reactions.

[0017] The liquid path hole is arranged at the lower part of the pole frame, and the gas path hole is arranged at the upper part of the pole frame.

[0018] At least two rivet holes are formed on the pole frame.

[0019] Furthermore, the upper air path hole is used to introduce hydrogen and oxygen generated by water electrolysis in the electrolytic cell into the downstream gas-liquid separation device, the lower liquid path hole is used to replenish alkaline solution into the electrolytic cell, the positioning hole is used to align the positions of each electrode plate and gasket when assembling the electrolytic cell, and the rivet hole is used to insert rivets.

[0020] Furthermore, the rivet assembly is performed simultaneously with the assembly of the electrolytic cell's anode, plates, cathode, and diaphragm. After all anodes, plates, cathodes, diaphragms, positive and negative pressure plates are installed, a pressure device is used to determine the final tension of the electrolytic cell, and the butterfly spring and nut are installed. After the entire electrolytic cell is assembled, the cell is adjusted to a horizontal position.

[0021] Furthermore, the electrolytic cell is in a vertical state during the assembly process, with the positive terminal pressure plate located at the bottom, and the gasket, bipolar plate assembly and diaphragm are stacked in sequence and in the order of gasket-bipolar plate assembly-diaphragm.

[0022] Furthermore, the positions and number of the rivet holes are adjusted accordingly according to the size of the electrolytic cell, the number of plates, and the weight of the cell body, and the size and number of the rivets are also adjusted accordingly.

[0023] Furthermore, for an alkaline electrolytic cell with 300-400 cells, a rivet insertion structure is used to fix the rivets, and the rivets form a rivet structure line that penetrates the cell body.

[0024] Furthermore, when the number of chambers of the electrolytic cell exceeds 400 or the electrode diameter is greater than 2 meters, the number of rivet holes and the diameter of the rivets are increased accordingly.

[0025] Furthermore, the number of rivet holes is increased to 8-10 according to the number of cells in the electrolytic cell, and the rivet holes are symmetrically distributed with the center of the plate as the center point. The number of layers of the pole frame penetrated by a single rivet is reduced to 3-4 according to the number of cells in the electrolytic cell.

[0026] Furthermore, the pull rod passes through the circular holes on the positive terminal pressure plate and the negative terminal pressure plate on both sides. Under the action of the butterfly spring and the nut, the pull rod squeezes the anode, the plate, and the gasket, thereby fixing the positive terminal pressure plate and the bipolar plate assembly or fixing the negative terminal pressure plate and the bipolar plate assembly.

[0027] Furthermore, the pole frame and the gasket are hollowed out at positions corresponding to the air path holes, the liquid path holes, the positioning holes and the rivet holes according to the sizes of the corresponding holes.

[0028] Compared with the prior art, the present invention provides an alkaline water electrolysis device that can quickly, efficiently and safely expand the scale of hydrogen production, and has the following beneficial effects:

[0029] 1. This alkaline water electrolysis equipment, which enables rapid, efficient, and safe expansion of hydrogen production, incorporates insulated rivets as fixing and supporting elements for equipment components. Compared to traditional connections that rely solely on bolts and nuts, insulated rivets not only provide better stability but also reduce the problem of structural subsidence of the electrolyzer after long-term operation. This improvement helps maintain the stability and longevity of the equipment.

[0030] 2. The alkaline water electrolysis equipment of the present invention allows for rapid expansion of hydrogen production scale, and by increasing the number of chambers, a substantial increase in the hydrogen production capacity of a single device is achieved.

[0031] 3. This alkaline water electrolysis equipment, which allows for rapid, efficient, and safe scalability of hydrogen production, utilizes insulated rivets and optimized assembly to improve electrolyzer safety and reduce potential safety risks associated with alkali solution leakage. This allows for rapid and efficient water electrolysis hydrogen production. The use of insulated rivets and optimized assembly ensure equipment stability, thereby improving hydrogen production efficiency. By rapidly expanding the number of chambers in the equipment, hydrogen production can be rapidly increased to meet growing demand.

[0032] 4. This alkaline water electrolysis equipment, designed for rapid, efficient, and safe expansion of hydrogen production, utilizes insulating rivets and an optimized assembly process to ensure equipment stability during extended operation. The secure attachment of components reduces structural sinking caused by prolonged operation and extends the equipment's service life. The use of insulating rivets and optimized assembly not only improves equipment stability but also mitigates potential safety risks associated with alkali solution leakage. This helps ensure safe operation and reduces operational risks.

[0033] 5. This alkaline water electrolysis equipment, which can quickly, efficiently and safely expand the scale of hydrogen production, has an efficient hydrogen production process and rapid scale expansion capabilities, which significantly improves production efficiency. Manufacturers can meet market demand more quickly and increase output value and profits. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG1 is a schematic diagram of the overall structure of the electrolytic cell proposed in the present invention.

[0035] FIG2 is a schematic cross-sectional view of A in FIG1 of the present invention.

[0036] FIG3 is a front view of the pole frame structure of the present invention.

[0037] FIG4 is a cross-sectional view of the multi-layer electrolytic cell structure along the BB direction in FIG3 .

[0038] FIG5 is a partial cross-sectional view of C in FIG4 .

[0039] Included: 1. Bolt. 2. Positive terminal plate. 3. Tie rod. 4. Negative terminal plate. 5. Butterfly spring. 6. Nut. 7. Frame. 8. Gasket. 9. Anode. 10. Plate. 11. Cathode. 12. Diaphragm. 13. Liquid hole. 14. Gas hole. 15. Rivet hole. 16. Positioning hole. 17. Rivet. 18. Rivet head. 19. Rivet shaft. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Please refer to Figures 1-4. An alkaline water electrolysis device for quickly, efficiently and safely expanding the scale of hydrogen production includes an alkaline water electrolysis device and a pull rod 3. A positive terminal pressure plate 2 is provided at one end of the alkaline water electrolysis device, and a negative terminal pressure plate 4 is provided at the other end of the alkaline water electrolysis device. A butterfly spring 5 is fixedly installed on the left end of the positive terminal pressure plate 2 and the side facing the negative terminal pressure plate 4. A bolt 1 is fixedly installed on the side of the positive terminal pressure plate 2 close to the butterfly spring 5. A nut 6 is provided on the outside of the bolt 1. Alternatingly arranged bipolar plate assemblies, pole frames 7, gaskets 8 and diaphragms 12 are provided between the positive terminal pressure plate 2 and the negative terminal pressure plate 4.

[0042] The pole frame 7 is provided with a liquid path hole 13 , an air path hole 14 , a rivet hole 15 , and a positioning hole 16 . As shown in FIG5 , a rivet 17 is provided inside the rivet hole 15 provided on the pole frame 7 . The rivet 17 includes a rivet head 18 and a rivet shaft 19 .

[0043] Specifically, the bipolar plate assembly is arranged inside the pole frame 7, and includes an anode 9, a pole plate 10, a cathode 11, and a diaphragm 12 arranged in sequence.

[0044] The pole frame 7 is made of metal and is conductive. The surfaces of the anode 9 and cathode 11 contain catalyst materials that are conducive to oxygen evolution and hydrogen evolution reactions.

[0045] The liquid path hole 13 is provided at the lower portion of the pole frame 7 , and the gas path hole 14 is provided at the upper portion of the pole frame 7 .

[0046] At least two rivet holes 15 are formed on the pole frame 7 .

[0047] Specifically, the upper gas path hole 14 is used to introduce hydrogen and oxygen generated by the electrolysis of water in the electrolytic cell into the downstream gas-liquid separation device, the lower liquid path hole 13 is used to replenish alkaline solution into the electrolytic cell, the positioning hole 16 is used to align the positions of each electrode plate and gasket 8 when assembling the electrolytic cell, and the rivet hole 15 is used to insert the rivet 17.

[0048] Specifically, the assembly of the rivets 17 is performed simultaneously with the assembly of the anode 9, electrode plate 10, cathode 11, and diaphragm 12 of the electrolytic cell. After all the anodes 9, electrode plates 10, cathodes 11, diaphragms 12, positive terminal pressure plates 2, and negative terminal pressure plates 4 are installed, the final tension of the electrolytic cell is determined by a pressure device, and the butterfly spring 5 and nut 6 are installed. After the entire electrolytic cell is assembled, the electrolytic cell is adjusted to a horizontal position.

[0049] Specifically, the electrolytic cell is in a vertical state during the assembly process, with the positive terminal pressure plate 2 located at the bottom, and is placed in the order and manner of gasket 8 - bipolar plate assembly - diaphragm 12 .

[0050] Specifically, the position and number of the rivet holes 15 are adjusted according to the size of the electrolytic cell, the number of plates, and the weight of the cell body, and the size and number of the rivets 17 are also adjusted accordingly.

[0051] Specifically, for an alkaline electrolytic cell with 300-400 cells, a rivet insertion structure is used to fix the rivets 17, and the rivets 17 form a rivet structure line that penetrates the cell body.

[0052] Specifically, when the number of chambers of the electrolytic cell exceeds 400 or the electrode diameter is greater than 2 meters, the number of rivet holes 15 and the diameter of the rivets 17 are increased accordingly.

[0053] Specifically, the number of rivet holes 15 increases to 8-10 according to the number of cells in the electrolytic cell, and the rivet holes 15 are symmetrically distributed around the center of the electrode plate 10. The number of single rivets 17 penetrating the electrode frame 7 is reduced to 3-4 layers according to the number of cells in the electrolytic cell.

[0054] Specifically, the pull rod 3 passes through the circular holes on the positive terminal pressure plate 2 and the negative terminal pressure plate 4 on both sides. Under the action of the butterfly spring 5 and the nut 6, the pull rod 3 squeezes the anode 9, the plate 10, the gasket 8, and the diaphragm 12 to fix the positive terminal pressure plate 2 and the bipolar plate assembly or fix the negative terminal pressure plate 4 and the bipolar plate assembly.

[0055] Specifically, the pole frame 7 and the gasket 8 are hollowed out at positions corresponding to the air path holes 14 , the liquid path holes 13 , the positioning holes 16 and the rivet holes 15 according to the sizes of the corresponding holes.

[0056] Example 1

[0057] An alkaline water electrolysis device for rapidly, efficiently and safely expanding the scale of hydrogen production includes an alkaline water electrolysis device and a pull rod 3. A positive terminal pressure plate 2 is provided at the left end of the alkaline water electrolysis device, and a negative terminal pressure plate 4 is provided at the right end of the alkaline water electrolysis device. A butterfly spring 5 is fixedly installed at the left end of the positive terminal pressure plate 2 and the right end of the negative terminal pressure plate 4. A bolt 1 is fixedly installed on the side of the negative terminal pressure plate 4 close to the butterfly spring 5. A nut 6 is provided on the outside of the bolt 1. Two positive terminal pressure plates 2 are provided, and a pole frame 7, a gasket 8, an anode 9, a pole plate 10, a cathode 11, and a diaphragm 12 are provided between the two positive terminal pressure plates 2.

[0058] The pole frame 7 is provided with a liquid path hole 13 , an air path hole 14 , a rivet hole 15 , and a positioning hole 16 . A rivet 17 is provided inside the rivet hole 15 provided on the pole frame 7 . The rivet 17 includes a rivet head 18 and a rivet shaft 19 .

[0059] Example 2

[0060] According to Example 1, an alkaline water electrolysis device for quickly, efficiently and safely expanding the scale of hydrogen production is provided, wherein the positive terminal pressure plate 2 and the negative terminal pressure plate 4 are respectively located at both ends of the alkaline water electrolysis device, and bipolar plate assemblies, gaskets 8 and diaphragms 12 are alternately arranged between the positive terminal pressure plate 2 and the negative terminal pressure plate 4. The pull rod 3 passes through the circular holes on the positive terminal pressure plate 2 and the negative terminal pressure plate 4 on both sides. The pull rod 3 squeezes the bipolar plate assembly and the gasket 8 under the action of the disc spring 5 and the nut 6, thereby achieving the effect of fixing and fitting.

[0061] Example 3

[0062] According to an alkaline water electrolysis device for rapidly, efficiently and safely expanding the scale of hydrogen production in Example 1, the bipolar plate assembly includes a pole frame 7, a pole plate 10, an anode 9 and a cathode 11, wherein the pole frame 7, the pole plate 10, the anode 9 and the cathode 11 are connected to each other by welding, the pole frame 7 is made of metal and is conductive, the surfaces of the anode 9 and the cathode 11 contain a catalyst material that facilitates oxygen evolution and hydrogen evolution reactions, the pole frame 7 includes an air path hole 14, a liquid path hole 13, a positioning hole 16 and a rivet hole 15, the upper air path hole 14 is used to introduce hydrogen and oxygen generated by electrolysis of water in the electrolyzer into a downstream gas-liquid separation device, the lower liquid path hole 13 is used to replenish alkaline solution into the electrolyzer, the positioning hole 16 is used to align the positions of each pole plate 10 and the gasket 8 when assembling the electrolyzer, and the rivet hole 15 is used to insert an insulating rivet 17, the insulating rivet 17 has a rivet head 18 and a rivet shaft 19, and the diameter of the rivet head 18 is larger than the diameter of the rivet shaft 19. Rivets 17 must be insulating. They are made of plastic, such as nylon. Nylon provides both rigidity and insulation. They are inserted into rivet holes 15 and come into direct contact with the surface of the electrode frame 7. The location and number of rivet holes 15 can be adjusted based on the size of the electrolytic cell, the number of electrode plates 10, and the cell weight.

[0063] Example 4

[0064] According to an alkaline water electrolysis device for rapidly, efficiently and safely expanding the scale of hydrogen production in Example 1, the assembly of the rivet 17 is carried out simultaneously with the assembly of the electrolytic cell bipolar plates, gaskets 8 and diaphragms 12. After all the bipolar plates, gaskets 8, diaphragms 12 and end pressure plates are installed, the final tension of the electrolytic cell is determined by a pressure device, and the butterfly spring 5 and nut 6 are installed. After the electrolytic cell is assembled, the electrolytic cell is adjusted to a horizontal state. On the one hand, there is friction between the outer wall of the rivet shaft 19 and the inner wall of the rivet hole 15. On the other hand, the rivet head 18 is limited by the space between the adjacent gaskets 8 and the pole frame 7. The rivet 17 can be safely and firmly embedded between the layers without the use of installation tools (such as rivet guns), and plays a role in strongly supporting components such as the bipolar plates.

[0065] Example 5

[0066] According to the alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production in Example 4, the rivets 17 are specifically installed as follows:

[0067] For an alkaline electrolytic cell with 300-400 cells, the rivet placement structure shown in FIG4 can be used, that is, four rivet structure lines running through the cell body.

[0068] Figure 4 shows two of these structural lines; the other two are located on the other side of the plate 10, symmetrically centered. The pole frame layer where the rivet head 18 resides must be stepped to accommodate the rivet head 18. The step depth should be 50%-70% of the plate frame thickness, taking into account the height of the rivet head 18. One rivet 17 penetrates five pole frames 7. The length of the rivet shaft 19 must account for the actual thickness of the gasket 8 when the electrolytic cell is tensioned. The gasket 8 is made of corrosion-resistant polytetrafluoroethylene. When the electrolytic cell is tensioned, the thickness of the gasket 8 decreases to approximately 70%-85% of the cell's thickness. The diameter of the rivet shaft 19 is between 15 and 30 mm, providing suitable strength. The diameter of the rivet hole 15 and the rivet shaft 19 should differ by ±2 mm. This reduces the misalignment between the bipolar plates and reduces the difficulty of assembling the rivet 17. During assembly, the electrolytic cell is in a vertical position, with the positive terminal pressure plate 2 at the bottom, followed by the gasket 8, bipolar plate assembly, and diaphragm 12, which are stacked in this order. During placement, the insulating rivet 17 is inserted into the rivet hole 15 as designed, with the rivet head 18 facing upward. The negative terminal pressure plate 4 is placed at the top, and then the tie rod 3 is installed. With the help of tensioning equipment, the cell body of the electrolytic cell is compressed in the longitudinal direction. When the entire electrolytic cell reaches the preset tensioning state, tighten the nut 6. Then, the electrolytic cell is converted from a vertical state to a horizontal state by using a crane.

[0069] Example 6

[0070] According to the alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production in Example 4, the rivets 17 are specifically installed as follows:

[0071] When the number of chambers in the electrolytic cell exceeds 400 or the electrode diameter is greater than 2 meters, the overall weight of the electrolytic cell may increase to more than 50 tons.

[0072] In this case, the possibility of the middle part of the electrolytic cell body sinking will increase significantly. To address this risk, the number of rivet holes 15 and the diameter of the rivets 17 must be increased according to actual conditions. Among them, the number of rivet holes 15 can be increased to 8-10, and the rivet holes 15 should be symmetrically distributed with the center of the electrode plate 10 as the center point. The number of single rivets 17 penetrating the electrode frame 7 is also reduced to 3-4 layers. Through the above design, the electrolytic cell can maintain safe, stable and reliable operation for a long time after doubling the scale of hydrogen production.

[0073] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An alkaline water electrolysis device for rapidly, efficiently and safely expanding the scale of hydrogen production, characterized by: The invention comprises an alkaline water electrolysis device and a pull rod (3), wherein a positive terminal pressure plate (2) is provided at one end of the alkaline water electrolysis device, and a negative terminal pressure plate (4) is provided at the other end of the alkaline water electrolysis device, a butterfly spring (5) is fixedly installed on the left end of the positive terminal pressure plate (2) and the side facing the negative terminal pressure plate (4), a bolt (1) is fixedly installed on the side of the positive terminal pressure plate (2) close to the butterfly spring (5), a nut (6) is provided on the outside of the bolt (1), and a bipolar plate assembly, a pole frame (7) and a gasket (8) arranged alternately are provided between the positive terminal pressure plate (2) and the negative terminal pressure plate (4); The pole frame (7) is provided with a liquid path hole (13), an air path hole (14), a rivet hole (15), and a positioning hole (16); a rivet (17) is provided inside the rivet hole (15) provided on the pole frame (7); and the rivet (17) includes a rivet head (18) and a rivet shaft (19).

2. The alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production according to claim 1, characterized in that: The bipolar plate assembly is arranged inside the pole frame (7), and includes an anode (9), a pole plate (10), a cathode (11), and a diaphragm (12) arranged in sequence; The pole frame (7) is made of metal and is conductive, and the surfaces of the anode (9) and cathode (11) contain catalyst materials that are conducive to oxygen evolution and hydrogen evolution reactions; at least two rivet holes (15) are opened on the pole frame (7); The liquid path hole (13) is arranged at the lower part of the pole frame (7), and the gas path hole (14) is arranged at the upper part of the pole frame (7).

3. The alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production according to claim 2, characterized in that: The upper gas path hole (14) is used to introduce hydrogen and oxygen generated by electrolysis of water in the electrolytic cell into a downstream gas-liquid separation device, the lower liquid path hole (13) is used to replenish alkaline solution into the electrolytic cell, the positioning hole (16) is used to align the positions of each electrode plate (10) and gasket (8) when assembling the electrolytic cell, and the rivet hole (15) is used to insert a rivet (17).

4. The alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production according to claim 1 is characterized in that: The assembly of the rivet (17) is carried out simultaneously with the assembly of the anode (9), the plate (10), the cathode (11), and the diaphragm (12) of the electrolytic cell. After all the anodes (9), the plate (10), the cathode (11), the diaphragm (12), the positive terminal pressure plate (2), and the negative terminal pressure plate (4) are installed, the tension of the final electrolytic cell is determined by a pressure device and the butterfly spring (5) and the nut (6) are installed. After the overall assembly of the electrolytic cell is completed, the electrolytic cell is adjusted to a horizontal state.

5. The alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production according to claim 2, characterized in that: The electrolytic cell is in a vertical state during the assembly process, with the positive terminal pressure plate (2) located at the bottom, and the gasket (8), bipolar plate assembly and diaphragm (12) are stacked in the order and manner of gasket (8) - bipolar plate assembly - diaphragm (12).

6. The alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production according to claim 1, characterized in that: The positions and number of the rivet holes (15) are adjusted accordingly based on the size of the electrolytic cell, the number of plates, and the weight of the cell body, and the size and number of the rivets (17) are also adjusted accordingly.

7. The alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production according to claim 1, characterized in that: For an alkaline electrolytic cell with 300-400 cells, a rivet insertion structure is used to fix the rivet (17), and the rivet (17) forms a rivet structure line that penetrates the cell body.

8. The alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production according to claim 3, characterized in that: When the number of cells of the electrolytic cell exceeds 400 or the electrode diameter is greater than 2 meters, the number of rivet holes (15) and the diameter of the rivets (17) are increased accordingly.

9. The alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production according to claim 8, characterized in that: The number of the rivet holes (15) increases to 8-10 according to the number of small chambers of the electrolytic cell, and the distribution of the rivet holes (15) is symmetrical with the center of the plate as the center point; the number of single rivets (17) passing through the pole frame (7) is reduced to 3-4 layers according to the number of small chambers of the electrolytic cell.

10. The alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production according to claim 3, characterized in that: The pull rod (3) passes through the circular holes on the positive terminal pressure plate (2) and the negative terminal pressure plate (4) on both sides. Under the action of the butterfly spring (5) and the nut (6), the pull rod (3) squeezes the anode (9), the plate (10), the cathode (11), and the gasket (8), thereby playing the role of fixing and fitting the positive terminal pressure plate (2), the bipolar plate assembly, and the negative terminal pressure plate (4).

11. The alkaline water electrolysis equipment for rapidly, efficiently and safely expanding the scale of hydrogen production according to claim 1, characterized in that: The pole frame (7) and the gasket (8) are hollowed out at positions corresponding to the air path holes (14), the liquid path holes (13), the positioning holes (16) and the rivet holes (15) according to the sizes of the corresponding holes.

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