A leak-proof hydrogen storage device

Abstract

The application provides a kind of hydrogen storage equipment of leakage prevention, belongs to new energy technology field.This kind of hydrogen storage equipment of leakage prevention, including liquid hydrogen storage tank body and external sleeve, the external sleeve is provided with leakage hydrogen capture mechanism, the leakage hydrogen capture mechanism includes porous flow guide grid and mounting sleeve.The application is provided with leakage hydrogen capture mechanism, when liquid hydrogen leakage occurs, liquid hydrogen will be instantaneously heat absorption vaporization and spray outward from the leakage, at this time, hydrogen gas carrying fluid dynamic pressure impacts on gas collection funnel, hydrogen gas enters into the flow passage inside hollow displacement guide rod through gas collection funnel, while inert gas enters into the inside of flow passage through first flow-through hole and second flow-through hole, inert gas enters flow passage under the action of pressure difference and completes primary turbulent mixing with hydrogen gas under the action of static spoiler, effectively reduces the safety risk of high concentration gas directly expanding outward.

Description

Technical Field

[0001] This invention relates to the field of new energy technology, and more specifically, to a leak-proof hydrogen storage device. Background Technology

[0002] Liquid hydrogen, as a highly promising clean energy carrier, is typically stored and transported in liquid hydrogen storage tanks with high-vacuum insulation layers. Existing hydrogen storage equipment usually has an external metal sleeve on the outside of the inner tank to provide physical protection. However, under long-term high-pressure working conditions, it is prone to minor leaks due to material fatigue. To address the potential leakage risk, existing technologies rely on external electronic gas concentration sensor arrays for monitoring and triggering external fans for forced ventilation when the concentration reaches a set threshold.

[0003] However, electronic sensor systems have inherent response delays and are prone to failure under extreme power outages or complex operating conditions, making it impossible to achieve real-time physical-level response. Passive ventilation and exhaust merely transfer leaked hydrogen to the external space. When the leakage suddenly increases, it can easily form a high-concentration flammable and reactive gas cloud in a local space, posing a significant safety hazard. When a leak occurs, the ejected gas is transparent and colorless, making it difficult for on-site maintenance personnel to visually and quickly pinpoint the exact leak location and assess the severity of the leak. The size and location of the leak directly affect the subsequent disposal of the storage tank. Summary of the Invention

[0004] To overcome the above deficiencies, the present invention provides a leak-proof hydrogen storage device that overcomes or at least partially solves the above technical problems.

[0005] This invention is implemented as follows: This invention provides a leak-proof hydrogen storage device, comprising a liquid hydrogen storage tank and an external sleeve, wherein the external sleeve is equipped with a leak-proof hydrogen capture mechanism, the leak-proof hydrogen capture mechanism comprising, A porous flow guiding grid is fixed to the inner wall of an outer sleeve. The porous flow guiding grid is composed of several honeycomb cells. Several cavities are opened on the outer sleeve. The number of cavities is the same as the number of honeycomb cells. A mounting sleeve is fixed to the outer wall of an outer sleeve. A hollow displacement guide rod is slidably disposed inside the mounting sleeve. One end of the hollow displacement guide rod extends into the cavity. A gas collecting funnel is fixed to the end of the hollow displacement guide rod. A flow channel is provided inside the hollow displacement guide rod. The gas collecting funnel is located inside the honeycomb cell and its shape is consistent with the honeycomb cell. A first spring is provided between the hollow displacement guide rod and the inner wall of the mounting sleeve.

[0006] In a preferred embodiment, the top of the hollow displacement guide rod has a plurality of first flow holes arranged in a linear array, the top of the hollow displacement guide rod has a first receiving cavity, a first sliding plate is slidably disposed inside the first receiving cavity, a second spring is disposed between the first sliding plate and the inner wall of the first receiving cavity, and a first locking block is fixedly disposed on the top of the first sliding plate.

[0007] In a preferred embodiment, the mounting sleeve has a housing box fixed inside, the housing box has a second receiving cavity inside, and the bottom of the second receiving cavity has a plurality of second flow holes, the number of the second flow holes being the same as the number of the first flow holes.

[0008] In a preferred embodiment, a second sliding plate is slidably disposed inside the second receiving cavity, a third spring is disposed between the second sliding plate and the inner wall of the receiving box, and a second locking block is fixedly disposed at one end of the second sliding plate extending to the outside of the receiving box, the second locking block abutting against the hollow displacement guide rod.

[0009] In a preferred embodiment, the mounting sleeve is provided with a grading marking mechanism, which includes a fixed sleeve coaxially fixed to the outer surface of the mounting sleeve, and a plurality of first marking tubes, second marking tubes and third marking tubes are provided on the side of the fixed sleeve near the gas collecting funnel.

[0010] In a preferred embodiment, a plurality of first drive cylinders, second drive cylinders, and third drive cylinders are provided on the side of the fixed sleeve away from the gas collecting funnel, and piston bolts are slidably provided inside the first drive cylinder, second drive cylinder, and third drive cylinder.

[0011] In a preferred embodiment, a piston rod is fixed to the piston bolt, and the axial length of the piston rods on the first drive cylinder, the second drive cylinder, and the third drive cylinder decreases in a step-like manner.

[0012] In a preferred embodiment, an air cylinder is coaxially fixed to the outer wall of the mounting sleeve, a first slip ring is slidably disposed inside the air cylinder, a connecting rod is fixed to the first slip ring, a second slip ring is fixed to one end of the connecting rod extending to the outside of the air cylinder, and a fifth spring is disposed between the first slip ring and the inner wall of the air cylinder.

[0013] In a preferred embodiment, the mounting sleeve is provided with a gas dilution mechanism, which includes a dilution cylinder fixed to the end of the mounting sleeve, and the dilution cylinder and the gas cylinder are connected by a gas pipe.

[0014] In a preferred embodiment, a connecting plug is slidably disposed inside the dilution cylinder, and a connecting pipe is fixedly disposed on the side of the connecting plug near the gas collecting funnel. The flow channel is connected to the inner cavity of the connecting pipe and the inner cavity of the connecting plug.

[0015] The present invention provides a leak-proof hydrogen storage device, the advantages of which include: 1. By setting up a leaking hydrogen capture mechanism, when liquid hydrogen leaks, the liquid hydrogen will instantly absorb heat and vaporize, spraying outward from the leak point. At this time, the hydrogen carrying fluid dynamic pressure will collide with the gas collecting funnel, and the hydrogen will enter the flow channel inside the hollow displacement guide rod through the gas collecting funnel. At the same time, inert gas will enter the interior of the flow channel through the first flow hole and the second flow hole. Under the action of pressure difference, the inert gas will enter the flow channel and complete the primary turbulent mixing with the hydrogen under the action of the static baffle, effectively reducing the safety risk of high concentration gas directly spreading outward.

[0016] 2. By setting up a graded marking mechanism, when hydrogen leaks, the first marking tube at the corresponding leak point honeycomb cell will work, spraying out a dye that does not react with hydrogen to mark the corresponding point of the leak in the liquid hydrogen storage tank. When the amount of hydrogen leaked is large, the second marking tube will start working, leaving different colored markings next to the first marking tube. This process continues, so that the leak level can be automatically classified according to the size of the leak point, which is convenient for subsequent treatment of the liquid hydrogen storage tank.

[0017] 3. By setting up a gas dilution mechanism, when the hollow displacement guide rod moves, it drives the connecting pipe and the connecting plug to move. At this time, the movement of the connecting plug will cause the side of the connecting plug inside the dilution cylinder that is close to the hollow displacement guide rod to become a negative pressure state. At this time, fresh air is drawn from the outside through the third one-way valve. At the same time, the leaked hydrogen gas mixed with the inert gas enters the interior of the dilution cylinder through the connecting pipe for secondary dilution. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure provided by an embodiment of the present invention; Figure 2 Exploded views of the external sleeve and liquid hydrogen storage tank are provided for embodiments of the present invention; Figure 3A partial cross-sectional view of the external sleeve is provided for embodiments of the present invention; Figure 4 A schematic diagram of the gas collecting funnel is provided for embodiments of the present invention; Figure 5 Exploded views of the fixing sleeve and the mounting sleeve are provided for embodiments of the present invention; Figure 6 A partial cross-sectional view of the air cylinder is provided for embodiments of the present invention; Figure 7 A partial cross-sectional view of the mounting sleeve is provided for embodiments of the present invention; Figure 8 Exploded views of the mounting sleeve and the hollow displacement guide rod are provided for embodiments of the present invention; Figure 9 A schematic diagram of the structure of the second slide plate and the second flow hole is provided for embodiments of the present invention; Figure 10 A schematic diagram of the structure of the first flow hole is provided for an embodiment of the present invention.

[0020] In the diagram: 1. Liquid hydrogen storage tank; 2. External sleeve; 301. Porous flow guide grid; 302. Cavity; 303. Mounting sleeve; 304. Hollow displacement guide rod; 305. Gas collection funnel; 306. Flow channel; 307. First spring; 308. First flow hole; 309. First receiving cavity; 310. First sliding plate; 311. Second spring; 312. First locking block; 313. Receiving box; 314. Second receiving cavity; 315. Second flow hole; 316. Second sliding plate; 317. Third spring; 318. Second locking block; 401. Fixing sleeve; 402. First marking tube; 403. Second marking tube; 404. Third marking tube; 405. First driving cylinder; 406. Second driving cylinder; 407. Third driving cylinder; 408. Piston bolt; 409. Piston rod; 410. Air cylinder; 411. First slip ring; 412. Connecting rod; 413. Second slip ring; 414. Fifth spring; 501. Dilution cylinder; 502. Connecting plug; 503. Connecting tube. Detailed Implementation

[0021] 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 embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Reference Figures 1-10This invention provides a technical solution: a leak-proof hydrogen storage device, comprising a liquid hydrogen storage tank 1 and an outer sleeve 2. The outer sleeve 2 is equipped with a leak-proof hydrogen capture mechanism, which includes a porous flow-guiding grid 301 and a mounting sleeve 303. The porous flow-guiding grid 301 is fixed to the inner wall of the outer sleeve 2 and is composed of several honeycomb cells. The outer sleeve 2 has several cavities 302, the number of which is the same as the number of honeycomb cells. The mounting sleeve 303 is fixed to the outer wall of the outer sleeve 2. A hollow displacement guide rod 304 is slidably installed, with one end of the hollow displacement guide rod 304 penetrating into the interior of the cavity 302. A gas collecting funnel 305 is fixed to the end of the hollow displacement guide rod 304. A flow channel 306 is provided inside the hollow displacement guide rod 304. The gas collecting funnel 305 is located inside the honeycomb cell and its shape matches the honeycomb cell. A first spring 307 is installed between the hollow displacement guide rod 304 and the inner wall of the mounting sleeve 303. The outer wall of the gas collecting funnel 305 is in close contact with the inner wall of the honeycomb cell. A first single-layer gas collector is installed in the flow channel 306 of the gas collecting funnel 305. A valve is used to prevent hydrogen backflow. The cross-section of the porous flow guide grid 301 in the axial direction is distributed in an arc shape. The end face of the conformal pressure-collecting hood is set as a conformal curved surface structure adapted to the porous flow guide grid 301 to ensure full capture of fluid during the sliding process. By setting a leaking hydrogen capture mechanism, this device is fitted from top to bottom onto the surface of the liquid hydrogen storage tank 1. When liquid hydrogen leaks, the liquid hydrogen will instantly absorb heat and vaporize, spraying outward from the leak. At this time, the hydrogen carrying the fluid dynamic pressure will collide with the gas collecting funnel 305, thereby overcoming the resistance of the first spring 307 and driving the gas collecting funnel 305 away from the liquid hydrogen. The storage tank 1 moves in a certain direction, and hydrogen enters the flow channel 306 inside the hollow displacement guide rod 304 through the gas collecting funnel 305. At the same time, inert gas (preferably nitrogen in this embodiment) enters the interior of the flow channel 306 through the first flow hole 308 and the second flow hole 315. Several static baffles are fixedly arranged in a staggered manner inside the flow channel 306 along the fluid travel direction. Under the action of pressure difference, the inert gas enters the flow channel 306 and generates a strong vortex with the hydrogen under the action of the static baffles, completing the primary turbulent mixing and effectively reducing the safety risk of direct external diffusion of high-concentration gas. Reference Figures 1-10The top of the hollow displacement guide rod 304 has several first flow holes 308 arranged in a linear array. A first receiving cavity 309 is also formed at the top of the hollow displacement guide rod 304. A flow channel 306 connects to the outside through the first flow holes 308. A second one-way valve is installed inside the first flow hole 308 to prevent hydrogen leakage. A first sliding plate 310 is slidably mounted inside the first receiving cavity 309. A second spring 311 is installed between the first sliding plate 310 and the inner wall of the first receiving cavity 309. A first locking block 312 is fixed to the top of the first sliding plate 310, and a high-polymer wear-resistant sealing gasket is embedded at the bottom of the first sliding plate 310. A dynamic seal is formed between the first sliding plate 310 and the first flow holes 308. The connection is as follows: the first locking block 312 engages with a slot on the mounting sleeve 303, so that when the hollow displacement guide rod 304 slides, the first sliding plate 310 remains stationary via the first locking block 312. A receiving box 313 is fixed inside the mounting sleeve 303, and a second receiving cavity 314 is formed inside the receiving box 313. Several second flow holes 315 are formed at the bottom of the second receiving cavity 314, connecting the second receiving cavity 314 to the outside through the second flow holes 315. The number of second flow holes 315 is the same as the number of first flow holes 308. A second sliding plate 316 is slidably disposed inside the second receiving cavity 314, and a third spring is provided between the second sliding plate 316 and the inner wall of the receiving box 313. Spring 317, second sliding plate 316 extends through to one end of the outer side of the receiving box 313 and is fixed with a second locking block 318. The second locking block 318 abuts against the hollow displacement guide rod 304. The second sliding plate 316 and the second flow hole 315 are dynamically sealed together. Multiple second receiving cavities 314 are connected to the same total inert gas supply chamber through an external high-pressure constant pressure pipeline, so that the initial gas pressure inside the second receiving cavity 314 is always greater than the limit dynamic pressure of hydrogen leakage. By setting the first flow hole 308 and the second flow hole 315, when the hollow displacement guide rod 304 moves, since the first locking block 312 remains stationary, relative movement occurs between the two. At this time, the first sliding plate 310 is displaced relative to the hollow displacement. The guide rod 304 moves to the left, causing the first first flow hole 308 to lose the obstruction of the first slide plate 310. At the same time, through the contact of the hollow displacement guide rod 304 and the second locking block 318, the hollow displacement guide rod 304 moves, causing the second locking block 318 and the second slide plate 316 to move, causing the first second flow hole 315 to lose the obstruction of the second slide plate 316. At this time, the first flow hole 308 and the second flow hole 315 form a connected gas path. Under the action of high pressure, inert gas enters the interior of the flow channel 306. The greater the leakage dynamic pressure, the longer the displacement of the hollow displacement guide rod 304, and the more overlapping flow holes are opened, realizing the purely mechanical adaptive proportional amplification of the inert gas injection volume. Reference Figures 1-10The mounting sleeve 303 is equipped with a grading marking mechanism, which includes a fixed sleeve 401. The fixed sleeve 401 is coaxially fixed to the outer surface of the mounting sleeve 303. A plurality of first marking tubes 402, second marking tubes 403, and third marking tubes 404 are provided on the side of the fixed sleeve 401 near the gas collecting funnel 305. The first marking tubes 402, second marking tubes 403, and third marking tubes 404 penetrate to the outer side of the inner wall of the porous guide grid 301. In this embodiment, the first marking tubes 402, second marking tubes 403, and third marking tubes 404... Each of the three marker tubes is arranged in a ring array. By setting up a graded marking mechanism, when hydrogen leaks, the first marking tube 402 at the corresponding leak point honeycomb cell works, spraying out a dye that does not react with hydrogen to mark the corresponding point of the leak in the liquid hydrogen storage tank 1. When the amount of hydrogen leaked is large, the second marking tube 403 starts to work, leaving different colored markings next to the first marking tube 402. This process is repeated, so that the leakage level can be automatically classified according to the size of the leak point, which is convenient for subsequent treatment of the liquid hydrogen storage tank 1. Reference Figures 1-10On the side of the fixed sleeve 401 away from the gas collecting funnel 305, several first drive cylinders 405, second drive cylinders 406, and third drive cylinders 407 are provided. A piston bolt 408 is slidably disposed inside each of the first drive cylinders 405, second drive cylinders 406, and third drive cylinders 407. A fourth spring is disposed between each of the first drive cylinders 405, second drive cylinders 406, and third drive cylinders 407 and the piston bolt 408. A piston rod 409 is fixedly disposed on the piston bolt 408. The axial length of the piston rod 409 on the first drive cylinders 405, second drive cylinders 406, and third drive cylinders 407 decreases in a stepped manner. In this embodiment, two of each of the first drive cylinders 405, second drive cylinders 406, and third drive cylinders 407 are provided. The first drive cylinders 405, second drive cylinders 406, and third drive cylinders 407 are connected to the first marking tube 402, second marking tube 403, and third marking tube 404 respectively via flexible hoses. A coaxial fixed structure is provided on the outer wall of the mounting sleeve 303. An air cylinder 410 has a first slip ring 411 slidably mounted inside it. A connecting rod 412 is fixed to the first slip ring 411. A second slip ring 413 is fixed to one end of the connecting rod 412 that extends to the outside of the air cylinder 410. A fifth spring 414 is provided between the first slip ring 411 and the inner wall of the air cylinder 410. By configuring the air cylinder 410 and the fixed sleeve 401, when the first slip ring 411 inside the air cylinder 410 moves, the second slip ring 413 is driven by the connecting rod 412. As the movement progresses, the second slip ring 413 presses against the piston rod 409 on the first drive cylinder 405, causing the first marking tube 402 to begin spraying dye outwards. Since the lengths of the piston rods 409 on the second drive cylinder 406 and the third drive cylinder 407 decrease sequentially, when the leak point is large, the impact force carried by the hydrogen is greater, and the first slip ring 411 moves a greater distance, thus beginning to press against the piston rod 409 on the second drive cylinder 406, thereby adding additional markings, and so on. Reference Figures 1-10A gas dilution mechanism is provided on the mounting sleeve 303. The gas dilution mechanism includes a dilution cylinder 501, which is fixed to the end of the mounting sleeve 303. The dilution cylinder 501 and the gas cylinder 410 are connected by a gas pipe. When the gas inside the dilution cylinder 501 is transferred to the inside of the gas cylinder 410, it will push the first slip ring 411 to slide. A third one-way valve is provided on the dilution cylinder 501 to absorb outside air while preventing the diluted gas from leaking out. A connecting plug 502 is slidably installed inside the dilution cylinder 501. The connecting plug 502 physically divides the internal space of the dilution cylinder 501 into a negative pressure suction chamber at the front end and a positive pressure exhaust chamber at the rear end. A connecting pipe 503 is fixed on the side of the connecting plug 502 near the gas collecting funnel 305. The flow channel 306 is connected to the inner cavity of the connecting pipe 503 and the inner cavity of the connecting plug 502 through the inner cavity of the connecting pipe 503. The connecting plug 502 has several vent holes located on the side of the connecting plug 502 near the hollow displacement guide rod 304. By setting a gas dilution mechanism, when the hollow displacement guide rod 304 moves, it drives the connecting pipe 503 and the connecting plug 502 to move. At this time, the movement of the connecting plug 502 will cause the side of the connecting plug 502 near the hollow displacement guide rod 304 inside the dilution cylinder 501 to become a negative pressure state. At this time, fresh air is drawn from the outside through the third one-way valve. At the same time, the leaked hydrogen gas mixed with the inert gas enters the interior of the dilution cylinder 501 through the connecting pipe 503 for secondary dilution. The movement of the connecting plug 502 will squeeze the gas on the side of the connecting plug 502 away from the hollow displacement guide rod 304, so that the gas enters the interior of the gas cylinder 410 through the gas pipe, thereby driving the first slip ring 411 to move.

[0023] Specifically, the working process or working principle of this leak-proof hydrogen storage device is as follows: During use, the outer sleeve 2 is fitted onto the surface of the liquid hydrogen storage tank 1. When a liquid hydrogen leak occurs, the liquid hydrogen instantly vaporizes and sprays outwards. The hydrogen gas, carrying impact force, strikes the gas collecting funnel 305, overcoming the resistance of the first spring 307 and driving the hollow displacement guide rod 304 to perform directional axial displacement within the mounting sleeve 303. The hydrogen gas within the hollow displacement guide rod 304 flows through the static baffle. Simultaneously, the displacement of the hollow displacement guide rod 304 keeps the first locking block 312 stationary while the second locking block 318 moves accordingly, causing the first sliding plate 310 and the second sliding plate 316 to be relatively misaligned. This causes the first flow hole 308 and the second flow hole 315 to gradually overlap and connect according to the displacement distance. The inert gas in the second receiving cavity 314 is injected proportionally. The gas enters the flow channel 306 and undergoes strong vortex primary mixing with hydrogen. The initially mixed gas is discharged into the inner cavity of the connecting plug 502 through the connecting channel and overflows. The connecting plug 502 slides in the dilution cylinder 501. This sliding creates a negative pressure at the front end, which draws a large amount of fresh air from the outside into the dilution cylinder 501 through the third one-way valve to complete the secondary deep dilution. At the same time, the sliding of the connecting plug 502 compresses the air in the rear chamber. The air enters the air cylinder 410 through the air pipe, pushing the second sliding rod and the second slip ring 413 inside to move backward. This sequentially compresses the first driving cylinder 405, the second driving cylinder 406, and the third driving cylinder 407, which have decreasing lengths of the piston rod 409. This forces the corresponding first marking tube 402, the second marking tube 403, and the third marking tube 404 to precisely spray dye of different shades onto the outer surface of the leak point of the liquid hydrogen tank.

Claims

1. A leak-proof hydrogen storage device, comprising a liquid hydrogen storage tank (1) and an external sleeve (2), characterized in that: The external sleeve (2) is equipped with a hydrogen leakage capture mechanism, which includes, A porous flow guide grid (301) is fixed on the inner wall of the outer sleeve (2). The porous flow guide grid (301) is composed of several honeycomb cells. Several cavities (302) are opened on the outer sleeve (2). The number of cavities (302) is the same as the number of honeycomb cells. A mounting sleeve (303) is fixed to the outer wall of the outer sleeve (2). A hollow displacement guide rod (304) is slidably arranged inside the mounting sleeve (303). One end of the hollow displacement guide rod (304) extends into the cavity (302). A gas collecting funnel (305) is fixed to the end of the hollow displacement guide rod (304). A flow channel (306) is arranged inside the hollow displacement guide rod (304). The gas collecting funnel (305) is located inside the honeycomb cell. The shape of the gas collecting funnel (305) is consistent with that of the honeycomb cell. A first spring (307) is arranged between the hollow displacement guide rod (304) and the inner wall of the mounting sleeve (303).

2. The leak-proof hydrogen storage device according to claim 1, characterized in that, The top of the hollow displacement guide rod (304) has a plurality of first flow holes (308) arranged in a linear array. The top of the hollow displacement guide rod (304) has a first receiving cavity (309). A first sliding plate (310) is slidably arranged inside the first receiving cavity (309). A second spring (311) is arranged between the first sliding plate (310) and the inner wall of the first receiving cavity (309). A first locking block (312) is fixedly provided on the top of the first sliding plate (310).

3. The leak-proof hydrogen storage device according to claim 2, characterized in that, The mounting sleeve (303) has a housing (313) fixed inside, and a second housing cavity (314) is opened inside the housing (313). A number of second flow holes (315) are opened at the bottom of the second housing cavity (314). The number of second flow holes (315) is the same as the number of first flow holes (308).

4. A leak-proof hydrogen storage device according to claim 3, characterized in that, The second receiving cavity (314) is slidably provided with a second sliding plate (316), and a third spring (317) is provided between the second sliding plate (316) and the inner wall of the receiving box (313). A second locking block (318) is fixedly provided at one end of the second sliding plate (316) extending to the outside of the receiving box (313), and the second locking block (318) abuts against the hollow displacement guide rod (304).

5. A leak-proof hydrogen storage device according to claim 1, characterized in that, The mounting sleeve (303) is provided with a grading marking mechanism, which includes a fixed sleeve (401). The fixed sleeve (401) is coaxially fixed on the outer surface of the mounting sleeve (303). The fixed sleeve (401) is provided with a plurality of first marking tubes (402), second marking tubes (403) and third marking tubes (404) on the side of the fixed sleeve (401) near the gas collecting funnel (305).

6. A leak-proof hydrogen storage device according to claim 5, characterized in that, The fixed sleeve (401) is provided with a plurality of first drive cylinders (405), second drive cylinders (406) and third drive cylinders (407) on the side away from the gas collecting funnel (305). Piston bolts (408) are slidably provided inside the first drive cylinder (405), second drive cylinder (406) and third drive cylinder (407).

7. A leak-proof hydrogen storage device according to claim 6, characterized in that, A piston rod (409) is fixed on the piston bolt (408), and the axial length of the piston rod (409) on the first drive cylinder (405), the second drive cylinder (406) and the third drive cylinder (407) decreases in a step-like manner.

8. A leak-proof hydrogen storage device according to claim 1, characterized in that, An air cylinder (410) is coaxially fixed to the outer wall of the mounting sleeve (303). A first slip ring (411) is slidably arranged inside the air cylinder (410). A connecting rod (412) is fixed on the first slip ring (411). A second slip ring (413) is fixed to one end of the connecting rod (412) that extends to the outside of the air cylinder (410). A fifth spring (414) is arranged between the first slip ring (411) and the inner wall of the air cylinder (410).

9. A leak-proof hydrogen storage device according to claim 8, characterized in that, The mounting sleeve (303) is provided with a gas dilution mechanism, which includes a dilution cylinder (501). The dilution cylinder (501) is fixed at the end of the mounting sleeve (303), and the dilution cylinder (501) and the gas cylinder (410) are connected by a gas pipe.

10. A leak-proof hydrogen storage device according to claim 9, characterized in that, The dilution cylinder (501) has a sliding connecting plug (502) inside. The connecting plug (502) has a connecting pipe (503) fixed on the side near the gas collecting funnel (305). The flow channel (306) is connected to the inner cavity of the connecting pipe (503) and the inner cavity of the connecting plug (502) through the inner cavity of the connecting pipe (503).

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