A pressurized hydrogen storage device with underground commercial concrete structure

Abstract

This invention provides a pressurized hydrogen storage device for underground commercial concrete structures, relating to the technical field of hydrogen storage devices. The device includes: a device shell; the shell comprises a first outer shell and a second outer shell, with an outer tank installed inside the first and second outer shells; a buffer layer is provided inside the outer tank, a reinforcing layer is installed inside the buffer layer, and a response alarm device is installed on the outside of the outer tank; an inner storage tank is installed inside the reinforcing layer, the inner storage tank and the reinforcing layer forming an inner tank, and a connector is installed on the top of the inner storage tank; a mounting base is provided on the side of the response alarm device away from the outer tank, and two pressure switches are provided on the end face of the mounting base. Because this invention incorporates a polymer-based elastic membrane, it can adapt to pressure fluctuations within the storage tank, achieving dynamic sealing and solving the problem of difficulty in achieving dynamic sealing in existing metal pressurized hydrogen storage devices.

Description

Technical Field

[0001] This invention relates to the field of hydrogen storage device technology, and in particular to a pressurized hydrogen storage device with an underground commercial concrete structure. Background Technology

[0002] Compared to traditional above-ground hydrogen storage tanks, underground hydrogen storage devices can significantly save land and offer advantages such as reduced leakage risk. However, currently, underground hydrogen storage mostly uses metal tanks, which have several drawbacks: difficulty in achieving dynamic sealing when internal pressure changes, leading to leakage risks; insufficient effectiveness in preventing hydrogen permeation; difficulty in maintaining the toughness of metal tanks under high pressure, resulting in a risk of breakage; high unit volume cost of metal hydrogen storage devices, increasing production costs; and technical bottlenecks in inhibiting hydrogen permeation and reducing leakage, making it difficult to respond promptly and issue alarms after a leak occurs. Furthermore, the relatively large size of underground concrete storage devices, coupled with on-site casting, prolongs the construction cycle, making it difficult to use precast concrete structures for rapid assembly and shorten the construction period. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a pressurized hydrogen storage device with an underground commercial concrete structure. This addresses the shortcomings of existing metal pressurized hydrogen storage devices, such as difficulty in achieving dynamic sealing, insufficient hydrogen permeation prevention, the difficulty in maintaining the toughness of metal tanks under high pressure leading to easy breakage, high unit volume cost, technical bottlenecks in inhibiting hydrogen permeation and reducing hydrogen leakage, difficulty in timely response and alarm issuance after hydrogen leakage, and the difficulty in achieving rapid assembly using precast commercial concrete components to shorten the construction cycle. Summary of the Invention

[0005] This invention provides a pressurized hydrogen storage device that solves the problems of traditional metal hydrogen storage tanks, such as difficulty in achieving dynamic sealing, insufficient hydrogen permeation prevention, difficulty in maintaining toughness and easy breakage under high pressure, relatively high cost, technical bottlenecks in reducing hydrogen leakage, and difficulty in responding promptly and issuing alarms after leakage.

[0006] In a first aspect, this disclosure provides a pressurized hydrogen storage device for an underground commercial concrete structure, specifically comprising: a device shell; the device shell includes a first outer shell and a second outer shell, the left side joint of the first outer shell and the second outer shell is a trapezoidal tenon and tenon joint, an outer tank is installed inside the first outer shell and the second outer shell, and a connecting component is installed at the right side joint of the first outer shell and the second outer shell; the connecting component includes a snap-fit ​​plate and a locking strip, the snap-fit ​​plate is snapped into the right side of the inside of the device shell, and the locking strip is engaged inside the first outer shell and the second outer shell, and the locking strip is inserted into the inside of the snap-fit ​​plate; The outer tank has an internal buffer layer, inside which a reinforcing layer is installed, and an alarm response device is installed on the outside of the outer tank. An inner storage tank is installed inside the reinforcing layer, and the inner storage tank and the reinforcing layer together form the inner tank. A connector is installed on the top of the inner storage tank. A seal is installed on the top of the connector, and the seal is installed on the top of the outer tank. A mounting base is provided on the side of the alarm response device away from the outer tank. The mounting base is fixedly welded to the inner wall of the second outer shell, and two pressure switches are provided on the end face of the mounting base. The internal circuitry of the pressure switches is connected to the alarm circuit of the external hydrogen storage control terminal.

[0007] In at least some embodiments, a connecting pipe is provided on the top of the outer tank, the connecting pipe is fixedly connected to the seal, and an inner tube is provided inside the connecting pipe. A pressure valve is installed outside the inner tube. The buffer layer is an internal gradient pore material layer composed of basalt fiber and aerogel, with the porosity gradually decreasing from 30% to 5%, so as to buffer during hydrogen diffusion. The structural improvement achieves the effect of enhanced protection.

[0008] In at least some embodiments, the bottom of the seal is provided with a sealing tube, the inner wall of which is threaded and threaded to the annular groove at the top of the connector.

[0009] In at least some embodiments, the locking strip has a transverse through hole inside, a rectangular baffle is provided at the bottom of the locking strip, and a transverse through hole is provided at the top right side of the device housing. The two transverse through holes are in the same position and size. A locking plate is inserted into the transverse through hole inside the locking strip. The buckle plate has two vertical through holes inside. After the buckle plate is inserted into the right side of the device housing, the vertical through hole inside the plug block is connected to the through hole inside the buckle plate and the two through holes are in the same position and size.

[0010] In at least some embodiments, an inner fixing rod is fixedly connected inside the alarm response device and on the mounting base. The inner fixing rod is provided with a guide plate and a pressure plate is movably engaged on the inner fixing rod. A connector is welded to the end of the inner fixing rod and welded to the outer wall of the outer tank. The outer wall of the pressure plate is tightly fitted with the cylinder wall of the alarm response device, and an air seal is formed between the pressure plate and the inner cylinder of the alarm response device. A high-pressure spring is connected between the pressure plate and the bottom plate of the mounting base.

[0011] In at least some embodiments, the bottom of the connector is integrally formed with a connecting plate, the outer wall of the connecting plate is threaded, the outer wall of the connector is threaded, the top surface of the connector is provided with an annular groove, and the inner wall of the annular groove is threaded.

[0012] In at least some embodiments, a sealing welding rod is provided on the outer edge of the splice between the first outer shell and the second outer shell. A protruding sealing plate and a sealing groove are respectively provided on the right side of the splice between the first outer shell and the second outer shell. The sealing plate on the first outer shell is inserted into the sealing groove of the second outer shell, and the sealing plate on the second outer shell is inserted into the sealing groove of the first outer shell. Corresponding inserts are respectively provided on the right side of the splice between the first outer shell and the second outer shell. A vertical through hole is opened inside the insert, and a locking strip is inserted into the through hole.

[0013] In at least some embodiments, the reinforcing layer is made of self-healing concrete, microbial capsules are implanted in the reinforcing layer material, a fixing pipe is provided at the top of the inner tank, an annular groove is opened at the top of the fixing pipe, and the outer wall of the annular groove is threaded. The interior of the inner tank is provided with a polymer matrix elastic membrane composed of modified polyamide and carbon nanotube composite material, and 10%-15% nano silica is added to improve low-temperature toughness and prevent low-temperature catalysis and hydrogen leakage. The inner wall of the inner tank is provided with a composite shielding layer, which is composed of 2 mm epoxy resin sprayed on the inner wall and 0.5 mm aluminum foil to inhibit hydrogen permeation.

[0014] This invention provides a pressurized hydrogen storage device for underground commercial concrete structures, which has the following beneficial effects:

[0015] Because of the polymer-based elastic membrane, this invention can adapt to pressure fluctuations in the storage tank and achieve dynamic sealing; because the hydrogen diffusion coefficient is better than that of a metal lining, it can block hydrogen permeation; and because it maintains toughness in a high-pressure hydrogen environment, the elongation at break has been tested and exceeds the ASTM D412 standard, thus achieving the effect of resisting hydrogen embrittlement.

[0016] Furthermore, the use of underground commercial concrete structures represents a breakthrough in the material properties of pressurized hydrogen storage devices.

[0017] Firstly, in terms of compressive strength: C100 and above concrete can withstand internal pressure of 15-25MPa, which can achieve a weight reduction of 30% compared with traditional metal hydrogen storage devices, while ensuring compressive strength;

[0018] Secondly, regarding impermeability: concrete incorporating nano-silica has a hydrogen permeability as low as 1×10⁻¹². m 2 / s, which is superior to most metallic materials;

[0019] Thirdly, in terms of corrosion resistance: it is immune to hydrogen embrittlement, and its life-cycle maintenance cost is only 15-20% of that of steel storage tanks.

[0020] In addition, the unit volume cost of underground commercial concrete hydrogen storage devices is much lower than that of steel tanks, and industrial solid waste can be used to replace some of the cement, reducing costs; the production stage reduces carbon emissions compared to steel tanks, making it more energy-efficient and environmentally friendly.

[0021] In addition, the composite shielding layer is made of 2mm epoxy resin sprayed on the inner wall and 0.5mm aluminum foil, which can inhibit hydrogen permeation; self-healing concrete: microbial capsules are implanted, which can automatically repair cracks with a width >0.1mm, reducing the leakage rate.

[0022] In addition, the device housing uses prefabricated standard parts, which can improve production efficiency and enable rapid assembly. Furthermore, the design of connectors and seals ensures a sealed connection at the pipe joint after connection, guaranteeing sealing and pressure resistance performance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0024] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0025] In the attached diagram:

[0026] Figure 1 A schematic diagram of the structure of the device housing of this application is shown;

[0027] Figure 2 This diagram illustrates the unfolded structure between the first outer shell and the second outer shell of this application.

[0028] Figure 3 A schematic diagram of the connection component of this application is shown;

[0029] Figure 4 A schematic diagram of the structure of the outer tank of this application is shown;

[0030] Figure 5 A cross-sectional structural diagram of the inner tank body of this application is shown;

[0031] Figure 6 A cross-sectional structural schematic diagram of the storage tank in this application is shown;

[0032] Figure 7 A cross-sectional structural schematic diagram of the connector of this application is shown;

[0033] Figure 8 A cross-sectional structural schematic diagram of the seal of this application is shown;

[0034] Figure 9 A partial cross-sectional structural schematic diagram of the alarm response device of this application is shown;

[0035] Figure 10 This application shows Figure 3 A magnified structural diagram of point A in the middle.

[0036] List of reference numerals

[0037] 1. Device housing; 11. First housing body; 12. Second housing body; 101. Sealing welding rod; 102. Sealing plate; 103. Sealing groove; 104. Insert block;

[0038] 2. Connecting components; 21. Buckle plate; 22. Locking strip; 2201. Locking plate;

[0039] 3. Outer tank body; 301. Connecting pipe; 302. Buffer layer;

[0040] 4. Inner tank body; 41. Reinforcement layer; 42. Inner storage tank; 4201. Fixed pipe;

[0041] 5. Connecting parts; 501. Connecting plate;

[0042] 6. Sealing components; 601. Sealing tube;

[0043] 7. Alarm response component; 701. Mounting base; 7011. Touch switch; 702. Inner retaining rod; 7021. Guide plate; 703. Connector; 704. Pressure plate. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0045] Example 1: Please refer to the appendix Figure 1 To be continued Figure 10 :

[0046] This invention proposes a pressurized hydrogen storage device for underground commercial concrete structures, comprising: a device shell 1; the device shell 1 includes a first shell body 11 and a second shell body 12, the left side joint of the first shell body 11 and the second shell body 12 is a trapezoidal tenon and tenon joint, an outer tank body 3 is installed inside the first shell body 11 and the second shell body 12, and a connecting component 2 is installed at the right side joint of the first shell body 11 and the second shell body 12; the connecting component 2 includes a snap-fit ​​plate 21 and a locking strip 22, the snap-fit ​​plate 21 is snapped into the right side of the inside of the device shell 1, and the locking strip 22 is engaged inside the first shell body 11 and the second shell body 12, and the locking strip 22 is inserted into the inside of the snap-fit ​​plate 21; the inner of the outer tank body 3... The outer tank 3 is provided with a buffer layer 302, and a reinforcing layer 41 is installed inside the buffer layer 302. A response alarm component 7 is installed on the outside of the outer tank 3. An inner storage tank 42 is installed inside the reinforcing layer 41. The inner storage tank 42 and the reinforcing layer 41 form the inner tank 4. A connector 5 is installed on the top of the inner storage tank 42. A sealing component 6 is installed on the top of the connector 5. The sealing component 6 is installed on the top of the outer tank 3. A mounting base 701 is provided on the side of the response alarm component 7 away from the outer tank 3. The mounting base 701 is fixedly welded to the inner wall of the second outer shell 12. Two pressure switches 7011 are provided on the end face of the mounting base 701. The internal circuit of the pressure switch 7011 is connected to the alarm circuit of the external hydrogen storage control terminal.

[0047] In the embodiments disclosed herein, as shown in the appendix Figure 4 and attached Figure 5 As shown, a connecting pipe 301 is provided on the top of the outer tank 3. The connecting pipe 301 is fixedly connected to the sealing element 6. An inner pipe is provided inside the connecting pipe 301. A pressure valve is installed outside the inner pipe. The buffer layer 302 is an internal gradient pore material layer composed of basalt fiber and aerogel. The porosity gradually decreases from 30% to 5%, so that it can buffer during hydrogen diffusion. The structural improvement achieves the effect of enhanced protection.

[0048] In the embodiments disclosed herein, as shown in the appendix Figure 5-7 As shown, the bottom of the connector 5 is integrally formed with a connecting plate 501. The outer wall of the connecting plate 501 is threaded, the outer wall of the connector 5 is threaded, and the top surface of the connector 5 is provided with an annular groove. The inner wall of the annular groove is threaded. The threads can be used to seal the connector 5 to the fixed pipe 4201. After the inner tank 4 is installed, the connector 5 can be used to complete the sealed connection between it and the inner tank 4.

[0049] In the embodiments disclosed herein, as shown in the appendix Figure 1 and attached Figure 10As shown, a sealing welding rod 101 is provided on the outer edge of the joint between the first outer shell 11 and the second outer shell 12. A protruding sealing plate 102 and a sealing groove 103 are respectively provided on the right side of the joint between the first outer shell 11 and the second outer shell 12. The sealing plate 102 on the first outer shell 11 is inserted into the sealing groove 103 of the second outer shell 12, and the sealing plate 102 on the second outer shell 12 is inserted into the sealing groove 103 of the first outer shell 11. Corresponding insertion blocks 104 are respectively provided on the right side of the joint between the first outer shell 11 and the second outer shell 12. A vertical through hole is opened inside the insertion block 104, and a locking strip 22 is inserted into the through hole. After the first outer shell 11 and the second outer shell 12 are joined, the sealing plate 102 and the sealing groove 103 are interlocked to achieve double sealing. The sealing welding rod 101 is used to completely seal the device outer shell 1, thereby ensuring the pressure resistance of the device outer shell 1.

[0050] In the embodiments disclosed herein, as shown in the appendix Figure 5 and attached Figure 6 As shown, the reinforcement layer 41 is made of self-healing concrete. Microbial capsules, including but not limited to Bacillus pasteurellii, are embedded in the reinforcement layer 41 material. This design can achieve automatic repair when the crack width is >0.1mm, reducing the leakage rate. The top of the inner storage tank 42 is provided with a fixing pipe 4201. The top of the fixing pipe 4201 has an annular groove, and the outer wall of the annular groove has threads. The interior of the inner storage tank 42 is provided with a polymer matrix elastic membrane composed of modified polyamide and carbon nanotube composite material. At the same time, 10%-15% nano silica is added to improve low temperature toughness and prevent low temperature catalysis and hydrogen leakage. The inner wall of the inner storage tank 42 is provided with a composite shielding layer, which is composed of 2mm epoxy resin sprayed on the inner wall and 0.5mm aluminum foil to inhibit hydrogen permeation.

[0051] In the embodiments disclosed herein, as shown in the appendix Figure 9 As shown, an inner fixing rod 702 is fixedly connected to the inside of the alarm response device 7 and the mounting base 701. A guide plate 7021 is provided on the inner fixing rod 702. A pressure plate 704 is movably engaged on the inner fixing rod 702. A connector 703 is welded to the end of the inner fixing rod 702. The connector 703 is welded to the outer wall of the outer tank 3. The outer wall of the pressure plate 704 is tightly fitted with the cylinder wall of the alarm response device 7. An air seal is formed between the pressure plate 704 and the inner cylinder of the alarm response device 7. A high-pressure spring is connected between the pressure plate 704 and the bottom plate of the mounting base 701. When hydrogen leakage occurs outside the outer tank 3, the pressure outside the outer tank 3 and inside the device housing 1 increases, thereby pushing the pressure plate 704 to move towards the mounting base 701. When it presses the touch switch 7011, the internal circuit is connected, thereby triggering the alarm to realize automatic alarm. The inner fixing rod 702 and the connector 703 can stabilize the position of the outer tank 3 in the device housing 1.

[0052] In the embodiments disclosed herein, as shown in the appendix Figure 3 and attached Figure 10 As shown, the locking bar 22 has a horizontal through hole inside, and a rectangular baffle is provided at the bottom of the locking bar 22. A horizontal through hole is provided on the top right side of the device housing 1. The two horizontal through holes are in the same position and size. A locking plate 2201 is inserted into the horizontal through hole inside the locking bar 22. The buckle plate 21 has two vertical through holes inside. After the buckle plate 21 is inserted into the right side of the device housing 1, the vertical through hole inside the insert block 104 communicates with the through hole inside the buckle plate 21, and their positions and sizes are the same. Similarly, after the locking strip 22 is inserted into the vertical through hole, the buckle plate 21 is fixedly connected to the device housing 1. The locking plate 2201 passes through the horizontal through hole in the locking strip 22 and the device housing 1 to lock the vertical position of the locking strip 22. The rectangular baffle at the bottom of the locking strip 22 prevents excessive displacement. When the rectangular baffle is attached to the outer surface of the device housing 1, it can be determined that the top position that the locking strip 22 can move upward has been reached, ensuring that the locking plate 2201 can be smoothly inserted.

[0053] In the embodiments disclosed herein, as shown in the appendix Figure 5 Appendix Figure 7 and attached Figure 8 As shown, a sealing tube 601 is provided at the bottom of the sealing element 6. The inner wall of the sealing tube 601 is threaded and is threaded to the annular groove at the top of the connector 5. After the sealing element 6 completes the sealing connection with the connector 5, the sealing element 6 can be fixedly connected to the top of the outer tank 3, thereby completing the sealing assembly.

[0054] Example 2: Based on Example 1, the elastic membrane can also utilize microencapsulation technology to release monomers and polymerize them at the cracks in EPDM rubber containing dicyclopentadiene (DCPD) microspheres, thereby increasing the repair efficiency to over 90%.

[0055] In Example 3, based on Example 1, the elastic membrane can be replaced with a smart response membrane, which is a composite of phase change material (PCM) and TPU. The membrane thickness can be increased by 10% above 40°C to compensate for thermal expansion and achieve intelligent temperature-controlled deformation. At the same time, a silver nanowire sensor network is embedded to monitor the local stress distribution in real time (accuracy ±0.1MPa) to achieve the effect of smart response.

[0056] In Example 4, based on Example 1, the elastic membrane can be replaced with a metal-polymer composite membrane, and plasma etching combined with silane coupling agent treatment is used to improve the bonding strength and prevent interface delamination.

[0057] The working principle of this embodiment is as follows: the connecting piece 5 can be sealed to the fixed pipe 4201 by using the thread. After the inner tank 4 is installed, the connecting piece 5 can be used to complete the sealed connection between it and the inner tank 4. After the sealing piece 6 completes the sealed connection with the connecting piece 5, the sealing piece 6 can be fixedly connected to the top of the outer tank 3. The connecting head 703 is connected to the outer wall of the outer tank 3 by welding. The mounting base 701 is connected to the inner wall of the second outer shell 12.

[0058] The buckle plate 21 is inserted into the right side of the device housing 1. After the locking strip 22 is inserted into the vertical through hole, the buckle plate 21 and the device housing 1 are fixedly connected. The locking plate 2201 passes through the locking strip 22 and the horizontal through hole in the device housing 1 to lock the vertical position of the locking strip 22. Finally, the sealing welding rod 101 is welded to complete the sealing connection between the first housing 11 and the second housing 12.

[0059] When hydrogen leaks outside the outer tank 3, the pressure outside the outer tank 3 and inside the device housing 1 increases, which pushes the pressure plate 704 toward the mounting base 701. When it presses the touch switch 7011, it connects the internal circuit, thereby triggering the alarm to realize automatic alarm.

Claims

1. A pressurized hydrogen storage device with an underground commercial concrete structure, comprising: Device housing (1); characterized in that the device housing (1) includes a first housing body (11) and a second housing body (12), the left side joint of the first housing body (11) and the second housing body (12) is a trapezoidal tenon and a tenon joint, an outer tank body (3) is installed inside the first housing body (11) and the second housing body (12), a sealing welding rod (101) is provided on the outer edge of the joint of the first housing body (11) and the second housing body (12), a protruding sealing plate (102) and a sealing groove (103) are respectively provided on the right side of the joint of the first housing body (11) and the second housing body (12), and the sealing plate (102) located on the first housing body (11) is inserted into the second housing body (12). In the sealing groove (103) of the first outer shell (11), the sealing plate (102) located on the second outer shell (12) is inserted into the sealing groove (103) of the first outer shell (11). On the right side of the splice of the first outer shell (11) and the second outer shell (12), there are corresponding inserts (104). The inserts (104) have vertical through holes, and the locking strips (22) are inserted into the through holes. A connecting component (2) is installed at the splice of the right side of the first outer shell (11) and the second outer shell (12). The connecting component (2) includes a buckle plate (21) and a locking strip (22). The buckle plate (21) is inserted into the right side of the device outer shell (1), and the locking strip (22) is engaged with the first outer shell. The shell (11) and the second outer shell (12) are inside, and the locking strip (22) is inserted into the buckle plate (21); the outer tank (3) is provided with a buffer layer (302), and a reinforcing layer (41) is installed inside the buffer layer (302). The buffer layer (302) is an internal gradient porous material layer composed of basalt fiber and aerogel, and a response alarm device (7) is installed on the outside of the outer tank (3); an inner storage tank (42) is installed inside the reinforcing layer (41). The inner storage tank (42) and the reinforcing layer (41) form the inner tank (4). A connector (5) is installed on the top of the inner storage tank (42). The inner storage tank (42) is provided with a modified polyamide and carbon nanotube composite material. The polymer matrix elastic film is formed, and 10%-15% nano silica is added. The inner wall of the inner storage tank (42) is provided with a composite shielding layer consisting of 2mm epoxy resin sprayed on the inner wall and 0.5mm aluminum foil. The top of the connector (5) is equipped with a sealing element (6), and the sealing element (6) is installed on the top of the outer tank (3). The alarm response element (7) is provided with a mounting base (701) on the side away from the outer tank (3). The mounting base (701) is fixedly welded to the inner wall of the second outer shell (12). The end face of the mounting base (701) is provided with two pressure switches (7011). The internal circuit of the pressure switch (7011) is connected to the external hydrogen storage control terminal alarm circuit.

2. The pressurized hydrogen storage device for underground commercial concrete structures according to claim 1, characterized in that, The locking bar (22) has a transverse through hole inside. A rectangular baffle is provided at the bottom of the locking bar (22). A transverse through hole is provided at the top right side of the device housing (1). The two transverse through holes are in the same position and size. A locking plate (2201) is inserted into the transverse through hole inside the locking bar (22). The buckle plate (21) has two vertical through holes inside. When the buckle plate (21) is inserted into the right side of the device housing (1), the vertical through hole inside the plug (104) is connected to the through hole inside the buckle plate (21) and the position and size are the same.

3. The pressurized hydrogen storage device for underground commercial concrete structures according to claim 1, characterized in that, The top of the outer tank (3) is provided with a connecting pipe (301), which is fixedly connected to the sealing element (6). The connecting pipe (301) is provided with an inner pipe, and a pressure valve is installed on the outside of the inner pipe.

4. A pressurized hydrogen storage device for underground commercial concrete structures according to claim 1, characterized in that, The reinforcement layer (41) is made of self-healing concrete, and microbial capsules are implanted in the reinforcement layer (41) material.

5. A pressurized hydrogen storage device for underground commercial concrete structures according to claim 4, characterized in that, The top of the inner storage tank (42) is provided with a fixed pipe (4201), and the top of the fixed pipe (4201) is provided with an annular groove, and the outer wall of the annular groove is provided with threads.

6. A pressurized hydrogen storage device for underground commercial concrete structures according to claim 1, characterized in that, The bottom of the connector (5) is integrally formed with a connecting plate (501), the outer wall of the connecting plate (501) is threaded, the outer wall of the connector (5) is threaded, the top surface of the connector (5) is provided with an annular groove, and the inner wall of the annular groove is threaded.

7. A pressurized hydrogen storage device for underground commercial concrete structures according to claim 6, characterized in that, The bottom of the sealing element (6) is provided with a sealing tube (601), and the inner wall of the sealing tube (601) is threaded and threaded to the annular groove at the top of the connector (5).

8. A pressurized hydrogen storage device for underground commercial concrete structures according to claim 3, characterized in that, An inner rod (702) is fixedly connected inside the alarm response device (7) and on the mounting base (701). A guide plate (7021) is provided on the inner rod (702). A pressure plate (704) is movably engaged on the inner rod (702). A connector (703) is welded to the end of the inner rod (702). The connector (703) is welded to the outer wall of the outer tank (3). The outer wall of the pressure plate (704) is tightly fitted to the cylinder wall of the alarm response device (7). An air seal is formed between the pressure plate (704) and the inner cylinder of the alarm response device (7). A high-pressure spring is connected between the pressure plate (704) and the bottom plate of the mounting base (701).

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