Pressurized hydrogen storage device of underground commercial concrete structure

Abstract

The invention provides an under-pressure hydrogen storage device of an underground commercial concrete structure, and relates to the technical field of hydrogen storage devices. The device shell comprises a first shell body and a second shell body, and an outer tank body is mounted in the first shell body and the second shell body; a buffer layer is arranged in the outer tank body, a reinforcing layer is mounted in the buffer layer, and a response alarm piece is mounted outside the outer tank body; an inner storage tank is mounted in the reinforcing layer, the inner storage tank and the reinforcing layer form an inner tank body, and a connecting piece is mounted at the top of the inner storage tank; a mounting base is arranged on the side, away from the outer tank body, of the response alarm piece, and two touch pressure switches are arranged on the end face of the mounting base. Due to the arrangement of the polymer-based elastic film, the metal belt pressure hydrogen storage device can adapt to internal pressure fluctuation of the storage tank, dynamic sealing is achieved, and the problem that an existing metal belt pressure hydrogen storage device has the defect that dynamic sealing is difficult to achieve is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen storage devices, and in particular to a pressure-bearing hydrogen storage device with an underground commercial concrete structure. Background Art

[0002] Compared with traditional above-ground hydrogen storage tanks, the use of underground hydrogen storage devices can greatly save land and has advantages such as reduced leakage risk. However, at present, underground hydrogen storage mostly uses metal tanks for hydrogen storage. Metal hydrogen storage devices have the following problems: when the pressure in the tank changes, it is difficult to achieve dynamic sealing, and there is a risk of leakage; there is a technical bottleneck in that the effect of blocking hydrogen permeation is not ideal enough; in a high-pressure environment, it is difficult for metal tanks to maintain toughness, resulting in a risk of easy fracture; the unit volume cost of metal hydrogen storage devices is relatively high, increasing production costs, and there are also technical bottlenecks in suppressing hydrogen permeation and reducing hydrogen leakage. Moreover, after hydrogen leakage occurs, it is difficult to respond in a timely manner and issue an alarm; since the gas storage device of underground commercial concrete is relatively large in volume, and the on-site casting method prolongs the construction period of manufacturing, it is difficult to achieve rapid assembly using precast commercial concrete structures, and at the same time shorten the construction period. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a pressure-bearing hydrogen storage device with an underground commercial concrete structure to solve the defects of the existing metal pressure-bearing hydrogen storage devices, such as the difficulty in achieving dynamic sealing; the technical bottleneck that the effect of blocking hydrogen permeation is not ideal enough; in a high-pressure environment, it is difficult for metal tanks to maintain toughness, resulting in easy fracture; the unit volume cost is relatively high, and there are also technical bottlenecks in suppressing hydrogen permeation and reducing hydrogen leakage, and after hydrogen leakage occurs, it is difficult to respond in a timely manner and issue an alarm, as well as the problem that it is difficult to achieve rapid assembly through precast commercial concrete structural components to shorten the construction period.

[0005] The present invention provides a pressure-bearing hydrogen storage device to solve the problems of the traditional metal hydrogen storage tank, such as the difficulty in achieving dynamic sealing, the unsatisfactory effect of blocking hydrogen permeation, the difficulty in maintaining toughness under high pressure and being prone to fracture, the relatively high cost, the technical bottleneck of reducing hydrogen leakage, and the difficulty in responding in a timely manner and issuing an alarm after leakage.

[0006] In a first aspect of the present disclosure, a pressurized hydrogen storage device of an underground commercial concrete structure is provided, specifically comprising: a device shell; the device shell comprises a first shell body and a second shell body, the left side joint of the first shell body and the second shell body is a trapezoidal head tenon and tail tenon plug-in connection, an outer tank body is installed inside the first shell body and the second shell body, and a connecting assembly is installed at the right side joint of the first shell body and the second shell body; the connecting assembly comprises a buckle plate and a locking strip, the buckle plate is buckled on the right side of the inner part of the device shell, the locking strip is clamped inside the first shell body and the second shell body, and the locking strip is plugged inside the buckle plate; A buffer layer is provided inside the outer tank body, a reinforcement layer is installed inside the buffer layer, and a response alarm component is installed outside the outer tank body; an inner storage tank is installed inside the reinforcement layer, the inner storage tank and the reinforcement layer constitute the inner tank body, and a connecting piece is installed on the top of the inner storage tank; a sealing piece is installed on the top of the connecting piece, and the sealing piece is installed on the top of the outer tank body; a mounting base is provided on the response alarm component, on the side away from the outer tank body, the mounting base is fixedly welded to the inner wall of the second outer shell, and two touch pressure switches are provided on the end face of the mounting base; the internal circuit of the touch pressure switch is connected to the external hydrogen storage control end alarm circuit.

[0007] In at least some embodiments, a connecting pipe is provided on the top of the outer tank body, the connecting pipe is fixedly connected to the seal, and an inner pipe is provided inside the connecting pipe, and an air pressure valve is installed outside the inner pipe. The buffer layer is an internal gradient porous material layer composed of basalt fiber and aerogel, and the porosity gradually decreases from 30% to 5%, so that buffering can be performed during hydrogen expansion, thereby achieving enhanced protection effect through structural improvements.

[0008] In at least some embodiments, a sealing tube is disposed at the bottom of the sealing member, and a thread is formed on the inner wall of the sealing tube and is threadedly connected to the annular groove at the top of the connector.

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

[0010] In at least some embodiments, an inner fixed rod is fixedly connected to the interior of the response alarm component and the mounting base, a guide plate is provided on the inner fixed rod, a pressure plate is movably clamped on the inner fixed rod, a connecting head is welded to the end of the inner fixed rod, the connecting head is welded to the outer wall of the outer tank body, the outer wall of the pressure plate is tightly fitted with the cylinder wall of the response alarm component, an air seal is formed between the pressure plate and the inner cylinder of the response alarm component, and a high-pressure spring is connected between the pressure plate and the bottom plate of the mounting base.

[0011] In at least some embodiments, a connecting plate is integrally formed at the bottom of the connecting member. Threads are provided on the outer wall of the connecting plate, and threads are also provided on the outer wall of the connecting member. An annular groove is provided inside the top surface of the connecting member, and threads are provided on the inner wall of the annular groove.

[0012] In at least some embodiments, a sealing welding rod is provided at the outer edge of the joint between the first outer casing and the second outer casing. A protruding sealing plate and a sealing groove are respectively provided on the right side of the joint between the first outer casing and the second outer casing. The sealing plate located on the first outer casing is inserted into the sealing groove of the second outer casing, and the sealing plate located on the second outer casing is inserted into the sealing groove of the first outer casing. Corresponding inserts are respectively provided on the right side of the joint between the first outer casing and the second outer casing. A vertically oriented through hole is provided inside the insert, and a locking bar is inserted into the through hole.

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

[0014] The present invention provides a pressure-resistant hydrogen storage device for an underground commercial concrete structure, which has the following beneficial effects:

[0015] Because the polymer matrix elastic membrane is provided in the present invention, it can adapt to the internal pressure fluctuation in the storage tank and achieve dynamic sealing; and because the hydrogen diffusion coefficient is better than that of the metal lining, the effect of blocking hydrogen permeation can be achieved; and it maintains toughness in a high-pressure hydrogen environment, and the elongation at break exceeds the ASTM D412 standard after testing, so the effect of resisting hydrogen embrittlement can be achieved.

[0016] In addition, by adopting an underground commercial concrete structure, the pressure-resistant hydrogen storage device has made a breakthrough in material performance:

[0017] First, in terms of compressive strength: Concrete with a strength grade of C100 or above can withstand an internal pressure of 15-25 MPa, which can achieve a 30% weight reduction compared with traditional metal hydrogen storage devices and ensure the compressive strength.

[0018] Second, in terms of impermeability: The hydrogen permeability of the concrete doped with nano-silica is as low as 1×10-12 m 2 / s, which is better than most metal materials.

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

[0020] In addition, the cost per unit volume of the underground commercial concrete hydrogen storage device is much lower than that of steel tanks, and industrial solid waste can be used to replace part of the cement to reduce costs; the carbon emissions are reduced during the production stage compared to steel tanks, making it more energy-saving and environmentally friendly.

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

[0022] In addition, the device shell adopts prefabricated standard parts, which can improve the production and manufacturing efficiency, realize rapid assembly at the same time, and through the design of connecting parts and seals, it can ensure the sealed connection at the pipeline after connection, ensuring the sealing and compressive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0024] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0025] In the drawings:

[0026] Figure 1 The structural schematic diagram of the device shell of the present application is shown;

[0027] Figure 2 The unfolded structural schematic diagram between the first shell body and the second shell body of the present application is shown;

[0028] Figure 3 The structural schematic diagram of the connection component of the present application is shown;

[0029] Figure 4 The structural schematic diagram of the outer tank body of the present application is shown;

[0030] Figure 5 The cross-sectional structural schematic diagram of the inner tank body of the present application is shown;

[0031] Figure 6 The cross-sectional structural schematic diagram of the inner storage tank of the present application is shown;

[0032] Figure 7 The cross-sectional structural schematic diagram of the connecting part of the present application is shown;

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

[0034] Figure 9 Shows a partial cross-sectional structural schematic diagram of the present application in response to an alarm component;

[0035] Figure 10 Shows the present application Figure 3 The enlarged structural schematic diagram at position A in the figure.

[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. Connection assembly; 21. Insertion 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 piece; 501. Connecting plate;

[0042] 6. Sealing member; 601. Sealing pipe;

[0043] 7. Alarm response component; 701. Installation base; 7011. Touch switch; 702. Inner fixing rod; 7021. Guide plate; 703. Connector; 704. Pressing plate. Detailed implementation manners

[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 of the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0045] Embodiment 1: Please refer to the attached Figure 1 to the attached Figure 10 :

[0046] The present invention proposes a pressurized hydrogen storage device of an underground commercial concrete structure, comprising: a device shell 1; the device shell 1 comprises a first outer shell 11 and a second outer shell 12, the left side joint of the first outer shell 11 and the second outer shell 12 is a trapezoidal head tenon and tail tenon plug-in connection, an outer tank body 3 is installed inside the first outer shell 11 and the second outer shell 12, and a connecting component 2 is installed at the right side joint of the first outer shell 11 and the second outer shell 12; the connecting component 2 comprises a buckle plate 21 and a locking strip 22, the buckle plate 21 is buckled on the right side of the inner part of the device shell 1, the locking strip 22 is buckled in the inner part of the first outer shell 11 and the second outer shell 12, and the locking strip 22 is plugged in the buckle plate 21; the inner part of the outer tank body 3 A buffer layer 302 is provided in the inner part, a reinforcement layer 41 is installed inside the buffer layer 302, and a response alarm component 7 is installed outside the outer tank body 3; an inner storage tank 42 is installed inside the reinforcement layer 41, the inner storage tank 42 and the reinforcement layer 41 constitute the inner tank body 4, and a connecting member 5 is installed on the top of the inner storage tank 42; a sealing member 6 is installed on the top of the connecting member 5, and the sealing member 6 is installed on the top of the outer tank body 3; a mounting base 701 is provided on the response alarm component 7, on the side away from the outer tank body 3, the mounting base 701 is fixedly welded to the inner wall of the second outer shell 12, and two touch pressure switches 7011 are provided on the end face of the mounting base 701; the internal circuit of the touch pressure switch 7011 is connected to the alarm circuit of the external hydrogen storage control end.

[0047] In the embodiments of the present disclosure, as shown in the attached Figure 4 and attached Figure 5 As shown, a connecting pipe 301 is provided on the top of the outer tank body 3, the connecting pipe 301 is fixedly connected to the sealing member 6, and an inner pipe is provided inside the connecting pipe 301, and an air pressure valve is installed outside the inner pipe. The buffer layer 302 is an internal gradient porous material layer composed of basalt fiber and aerogel, and the porosity gradually decreases from 30% to 5%, so that buffering can be performed during hydrogen expansion, and the effect of enhanced protection is achieved through structural improvements.

[0048] In the embodiments of the present disclosure, as shown in the attached Figure 5 - 7 As shown, a connecting plate 501 is integrally formed at the bottom of the connecting member 5, a thread is provided on the outer wall of the connecting plate 501, a thread is provided on the outer wall of the connecting member 5, an annular groove is provided inside the top surface of the connecting member 5, and a thread is provided on the inner wall of the annular groove. The thread can be used to seal the connecting member 5 to the fixed tube 4201, and after the installation of the inner tank body 4 is completed, the connecting member 5 can be used to complete the sealed connection between it and the inner tank body 4.

[0049] In the embodiments of the present disclosure, as shown in the attached Figure 1 and attached Figure 10As shown in the figure, a sealing welding rod 101 is provided at the outer edge of the joint between the first outer casing 11 and the second outer casing 12. On the right side of the joint between the first outer casing 11 and the second outer casing 12, a protruding sealing plate 102 and a sealing groove 103 are respectively provided. The sealing plate 102 located on the first outer casing 11 is inserted into the sealing groove 103 of the second outer casing 12, and the sealing plate 102 located on the second outer casing 12 is inserted into the sealing groove 103 of the first outer casing 11. On the right side of the joint between the first outer casing 11 and the second outer casing 12, corresponding inserts 104 are respectively provided. A vertically oriented through hole is formed inside the insert 104, and a locking bar 22 is inserted into the through hole. After the first outer casing 11 and the second outer casing 12 are spliced, the double-channel seal is achieved by the mutual insertion of the sealing plate 102 and the sealing groove 103, and the device casing 1 is completely sealed by the sealing welding rod 101, thereby ensuring the pressure resistance of the device casing 1.

[0050] In the embodiment of the present disclosure, as shown in the attached Figure 5 and attached Figure 6 figures, the reinforcement layer 41 is made of self-healing concrete, and microbial capsules, including but not limited to Bacillus pasteurii, are implanted in the material of the reinforcement layer 41. Such a design can achieve automatic repair when the crack width > 0.1 mm, reducing the leakage rate. A fixed pipe 4201 is provided at the top of the inner storage tank 42. An annular groove is formed at the top of the fixed pipe 4201, and a thread is provided on the outer wall of the annular groove. A polymer matrix elastic membrane composed of a modified polyamide and carbon nanotube composite is provided inside the inner storage tank 42, and 10 - 15% of nano-silica is added to improve the low-temperature toughness and prevent low-temperature catalysis and hydrogen leakage. A composite shielding layer is provided on the inner wall of the inner storage tank 42, and the composite shielding layer is composed of 2 mm of epoxy resin sprayed on the inner wall and 0.5 mm of aluminum foil to inhibit hydrogen permeation.

[0051] In the embodiment of the present disclosure, as shown in the attached Figure 9 figures, inside the response alarm member 7, an inner fixing rod 702 is fixedly connected to the mounting base 701. A guiding plate 7021 is provided on the inner fixing rod 702. A pressing plate 704 is movably clamped on the inner fixing rod 702. A connecting head 703 is welded to the end of the inner fixing rod 702, and the connecting head 703 is welded to the outer wall of the outer tank 3. The outer wall of the pressing plate 704 is in close contact with the barrel wall of the response alarm member 7. An air seal is formed between the pressing plate 704 and the inner barrel of the response alarm member 7, and a high-pressure spring is connected between the pressing plate 704 and the bottom plate of the mounting base 701. When hydrogen leaks outside the outer tank 3, the pressure outside the outer tank 3 and inside the device casing 1 increases, thereby pushing the pressing plate 704 to move towards the mounting base 701. When the touch switch 7011 is pressed, the internal circuit is connected, so that the alarm can be triggered to achieve automatic alarm, and the inner fixing rod 702 and the connecting head 703 can stabilize the position of the outer tank 3 in the device casing 1.

[0052] In the embodiments of the present disclosure, as shown in the appended Figure 3 and the appended Figure 10 As shown, a horizontal through-hole is provided inside the locking bar 22, a rectangular baffle is provided at the bottom of the locking bar 22, a horizontal through-hole is provided at the top right of the device housing 1, and the positions and sizes of the two horizontal through-holes are the same. A locking plate 2201 is inserted into the horizontal through-hole inside the locking bar 22. Two vertical through-holes are provided inside the insertion buckle plate 21. After the insertion buckle plate 21 is inserted into the right side of the device housing 1, the vertical through-hole inside the insertion block 104 communicates with the through-holes inside the insertion buckle plate 21 and the positions and sizes are the same. After the locking bar 22 is inserted into the vertical through-hole, the fixed connection between the insertion buckle plate 21 and the device housing 1 is completed. The locking plate 2201 passes through the horizontal through-holes in the locking bar 22 and the device housing 1 to complete the vertical position locking of the locking bar 22. The rectangular baffle at the bottom of the locking bar 22 is used to prevent excessive displacement. When the rectangular baffle fits against the outer surface of the device housing 1, it can be determined that the topmost position where the locking bar 22 can move upward has been reached, ensuring that the locking plate 2201 can be smoothly inserted.

[0053] In the embodiments of the present disclosure, as shown in the appended Figure 5 and the appended Figure 7 and the appended Figure 8 As shown, a sealing tube 601 is provided at the bottom of the seal 6. The inner wall of the sealing tube 601 is provided with threads and is threadedly connected to the annular groove at the top of the connecting member 5. After the seal 6 is hermetically connected to the connecting member 5, the seal 6 can be fixedly connected to the top of the outer tank 3, thereby completing the sealing assembly.

[0054] Embodiment 2: On the basis of Embodiment 1, the elastic film can also adopt microcapsule technology using EPDM rubber containing dicyclopentadiene (DCPD) microspheres. Monomers are released and polymerized at the crack, and the repair efficiency is increased to more than 90%.

[0055] Embodiment 3: On the basis of Embodiment 1, the elastic film can be replaced with a smart response film, which is made of a composite of a phase change material (PCM) and TPU. The film thickness can increase by 10% above 40 °C to compensate for thermal expansion, achieving 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 ±0.1 MPa), achieving the effect of smart response.

[0056] Embodiment 4: On the basis of Embodiment 1, the elastic film can be replaced with a metal-polymer composite film. Plasma etching and silane coupling agent treatment are used to improve the bonding strength and prevent interface delamination.

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

[0058] The buckle plate 21 is plugged into the right side of the device housing 1, and the locking strip 22 is plugged into the vertical through hole to complete the fixed connection between the buckle plate 21 and the device housing 1. The locking plate 2201 is passed through the horizontal through hole in the locking strip 22 and the device housing 1 to complete the vertical position locking of the locking strip 22. Finally, the sealing welding rod 101 is welded to complete the sealing connection between the first outer shell 11 and the second outer shell 12.

[0059] When hydrogen leaks outside the outer tank body 3, the pressure outside the outer tank body 3 and inside the device housing 1 increases, thereby pushing the pressure plate 704 to move toward the mounting base 701. After pressing the touch switch 7011, the internal circuit is connected, thereby triggering an alarm to realize automatic alarm.

Claims

1. A pressurized hydrogen storage device for an underground commercial concrete structure, comprising: The device shell (1) is characterized in that the device shell (1) comprises 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 head tenon and tail tenon plug-in connection; the first shell body (11) and the second shell body (12) are internally installed with an outer tank body (3); and the right side joint of the first shell body (11) and the second shell body (12) is installed with a connecting component (2); the connecting component (2) comprises a buckle plate (21) and The locking strip (22) is buckled in the right side of the device housing (1), the locking strip (22) is buckled in the first housing (11) and the second housing (12), and the locking strip (22) is plugged in the buckle plate (21); the outer tank body (3) is provided with a buffer layer (302) inside, the buffer layer (302) is provided with a reinforcement layer (41) inside, the buffer layer (302) is an internal gradient pore material layer composed of basalt fiber and aerogel, and the outer tank body (3) is provided with a buffer layer (302) inside. A response alarm component (7) is installed; an inner storage tank (42) is installed inside the reinforcement layer (41); the inner storage tank (42) and the reinforcement layer (41) form an inner tank body (4); a connecting component (5) is installed on the top of the inner storage tank (42); a polymer matrix elastic film composed of a modified polyamide and a carbon nanotube composite material is arranged inside the inner storage tank (42); and 10-15% nano silicon dioxide is added at the same time; the inner wall of the inner storage tank (42) is provided with a 2mm epoxy resin sprayed on the inner wall and a 0.5mm aluminum foil. a composite shielding layer; a sealing member (6) is installed on the top of the connecting member (5), and the sealing member (6) is installed on the top of the outer tank body (3); a mounting base (701) is provided on the response alarm member (7) at a side away from the outer tank body (3), the mounting base (701) is fixedly welded to the inner wall of the second outer shell (12), and two touch-pressure switches (7011) are provided on the end surface of the mounting base (701); the internal circuit of the touch-pressure switch (7011) is connected to the external hydrogen storage control end alarm circuit.

2. A pressurized hydrogen storage device for an underground commercial concrete structure according to claim 1, characterized in that: A sealing welding rod (101) is arranged at 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 arranged 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); the sealing plate (102) on the second outer shell (12) is inserted into the sealing groove (103) of the first outer shell (11); corresponding plug blocks (104) are respectively arranged 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 plug block (104); a locking strip (22) is inserted inside the through hole.

3. A pressurized hydrogen storage device for an underground commercial concrete structure according to claim 2, characterized in that: The locking strip (22) has a transverse through hole formed inside, a rectangular baffle is provided at the bottom of the locking strip (22), a transverse through hole is formed at the top right side of the device housing (1), the two transverse through holes have the same position and size, a lock plate (2201) is inserted into the transverse through hole inside the locking strip (22), two vertical through holes are formed inside the plug plate (21), and when the plug plate (21) is plugged into the right side of the device housing (1), the vertical through hole inside the plug block (104) is connected to the through hole inside the plug plate (21), and the position and size are the same.

4. A pressurized hydrogen storage device for an underground commercial concrete structure according to claim 1, characterized in that: A connecting pipe (301) is provided at the top of the outer tank body (3), the connecting pipe (301) is fixedly connected to the sealing member (6), an inner pipe is provided inside the connecting pipe (301), and an air pressure valve is installed outside the inner pipe.

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

6. A pressurized hydrogen storage device for an underground commercial concrete structure according to claim 5, characterized in that: A fixing pipe (4201) is arranged on the top of the inner storage tank (42), an annular groove is provided on the top of the fixing pipe (4201), and a thread is provided on the outer wall of the annular groove.

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

8. A pressurized hydrogen storage device for an underground commercial concrete structure according to claim 7, characterized in that: A sealing tube (601) is provided at the bottom of the sealing member (6), and a thread is provided on the inner wall of the sealing tube (601) and is threadedly connected to the annular groove at the top of the connecting member (5).

9. The pressurized hydrogen storage device for an underground commercial concrete structure according to claim 4, characterized in that: An inner fixing rod (702) is fixedly connected to the interior of the response alarm component (7) and the mounting base (701); a guide plate (7021) is provided on the inner fixing rod (702); a pressure plate (704) is movably connected to 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 body (3); the outer wall of the pressure plate (704) is tightly fitted to the cylinder wall of the response alarm component (7); an air seal is formed between the pressure plate (704) and the inner cylinder of the response alarm component (7); and a high-pressure spring is connected between the pressure plate (704) and the bottom plate of the mounting base (701).

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