Lossless liquid hydrogen storage system

Abstract

The application provides a lossless liquid hydrogen storage system, which comprises a liquid hydrogen container, a first pipeline, a hydrogen liquefying device, a second pipeline, a liquid hydrogen circulating pump, a third pipeline and a fourth pipeline. One end of the first pipeline is communicated with the top of the liquid hydrogen container. The input end of the hydrogen liquefying device is communicated with the end of the first pipeline away from the liquid hydrogen container, and the hydrogen liquefying device is used for converting gaseous hydrogen gas delivered by the top gas pipe into liquid hydrogen gas. The second pipeline is communicated with the output end of the hydrogen liquefying device. The input end of the liquid hydrogen circulating pump is communicated with the end of the second pipeline away from the hydrogen liquefying device. In the application, gaseous hydrogen gas is re-liquefied after entering the hydrogen liquefying device from the first pipeline, and then is delivered back to the bottom of the liquid hydrogen container through the liquid hydrogen circulating pump, the third pipeline and the fourth pipeline, so that the waste of hydrogen resources is avoided.

Description

Technical Field

[0001] This invention relates to the field of hydrogen energy storage equipment technology, and specifically to a lossless liquid hydrogen storage system. Background Technology

[0002] Cryogenic hydrogen storage is one method of hydrogen storage. During the storage and application of liquid hydrogen, because liquid hydrogen containers, pipelines, and equipment cannot be completely insulated, heat from the environment is conducted into the liquid hydrogen container. This causes localized heating of the liquid hydrogen on the inner wall and near the liquid surface, resulting in localized evaporation and the formation of gaseous hydrogen. Consequently, the internal pressure of the liquid hydrogen container increases. When the pressure inside the liquid hydrogen container reaches a safe level, the gaseous hydrogen needs to be released through a safety pressure relief device. This leads to a waste of hydrogen resources and also poses certain safety risks. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention provides a lossless liquid hydrogen storage system, which can solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0004] This invention provides a lossless liquid hydrogen storage system.

[0005] Preferably, a lossless liquid hydrogen storage system includes: liquid hydrogen container; A first conduit, one end of which is connected to the top of the liquid hydrogen container; A hydrogen liquefaction device, wherein the input end of the hydrogen liquefaction device is connected to the end of the first pipeline away from the liquid hydrogen container, and the hydrogen liquefaction device is used to convert gaseous hydrogen delivered from the first pipeline into liquid hydrogen. The second pipeline is connected to the output end of the hydrogen liquefaction device; A liquid hydrogen circulation pump, wherein the input end of the liquid hydrogen circulation pump is connected to the end of the second pipeline away from the hydrogen liquefaction device, and the liquid hydrogen circulation pump is used to pump liquid hydrogen. A third pipeline, connected to the output end of the liquid hydrogen circulation pump, is equipped with a check valve; and A fourth pipe, one end of which is connected to the end of the third pipe away from the liquid hydrogen circulation pump, and the other end of which is connected to the bottom of the liquid hydrogen container; Control valves are installed on the first pipe and the fourth pipe.

[0006] Preferably, it further includes: The fifth pipe has one end connected to the end of the third pipe away from the liquid hydrogen circulation pump, and the other end connected to the top of the liquid hydrogen container. A control valve is installed on the fifth pipeline.

[0007] Preferably, it further includes: The sixth pipe is closed at both ends and is connected to the fourth pipe; Multiple seventh pipes, one end of which is simultaneously connected to the sixth pipe, and the other end of which is inserted into the liquid hydrogen container; and Multiple U-shaped tubes are arranged parallel to each other in the liquid hydrogen container, with the openings of the U-shaped tubes facing upwards and the middle part of the U-shaped tubes connected to the end of the corresponding seventh pipe away from the sixth pipe.

[0008] Preferably, it also includes a hydrogen emission control mechanism; The U-shaped tube includes: A connecting pipe, the middle portion of which is connected to the seventh pipe; and Two vertically arranged mounting pipes, the lower ends of the two mounting pipes being connected to both ends of the connecting pipe respectively; Multiple sets of hydrogen venting holes are provided on the side wall of the mounting tube; the multiple sets of hydrogen venting holes are distributed along the axial direction of the mounting tube; each set of hydrogen venting holes is on the same horizontal plane; the hydrogen venting control mechanism can control the liquid hydrogen to be discharged from one of the sets of hydrogen venting holes.

[0009] Preferably, a plurality of support rods are connected to the lower inner wall of the mounting tube, and the plurality of support rods are evenly distributed around the axis of the mounting tube; a coaxial first limiting ring is also connected to the inner wall of the mounting tube; the first limiting ring is located below the plurality of hydrogen venting holes on the mounting tube; The hydrogen emission control mechanism includes: Multiple nested shielding cylinders are arranged on a coaxial axis. Each shielding cylinder has a coaxial first retaining ring connected to its lower outer wall and a coaxial second limiting ring connected to its upper inner wall. The second retaining ring is slidably engaged with the inner wall of the inner layer of the shielding cylinder. The second retaining ring can move upward and then abut against the second limiting ring on the inner wall of the inner layer of the shielding cylinder. Connector, the connector being connected to the second retaining ring; and A limiting block is provided, which slides in conjunction with the inner wall of the mounting tube, and the lower end of the limiting block is connected to the connector. The first retaining ring on the outer layer of the plurality of shielding cylinders slides in engagement with the inner wall of the mounting tube and can move upward to abut against the first limiting ring. The first retaining ring of the other shielding cylinders can move upward to abut against the second limiting ring on the adjacent shielding cylinder. The plurality of support rods can support the lower ends of the plurality of shielding cylinders.

[0010] Preferably, each of the seventh pipes is equipped with a control valve to control the opening and closing of the seventh pipe.

[0011] Preferably, each group of hydrogen venting holes on the mounting tube includes a plurality of hydrogen venting holes evenly arranged along the circumference of the mounting tube.

[0012] Preferably, two adjacent sets of hydrogen vent holes on the same mounting pipe are staggered.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In this invention, gaseous hydrogen enters the hydrogen liquefaction device through the first pipe, is reliquefied, and then transported back to the bottom of the liquid hydrogen container through the liquid hydrogen circulation pump, the third pipe, and the fourth pipe, thereby avoiding the waste of hydrogen resources. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is a schematic diagram of the process flow of a lossless liquid hydrogen storage system according to an embodiment of the present invention. Figure 2 This is a perspective view of the liquid hydrogen container of a lossless liquid hydrogen storage system according to an embodiment of the present invention. Figure 3 for Figure 2 Schematic diagram of the internal structure of the liquid hydrogen container; Figure 4 for Figure 3 A 3D view of the U-shaped tube; Figure 5 for Figure 4 Internal structure diagram; Figure 6 for Figure 5 Enlarged diagram of point S in the middle.

[0016] Figure label: 10. Liquid hydrogen container; 20. First pipeline; 21. Hydrogen liquefaction unit; 22. Second pipeline; 23. Liquid hydrogen circulation pump; 24. Third pipeline; 25. Check valve; 26. Fourth pipeline; 27. Control valve; 28. Fifth pipeline; 29. ​​Sixth pipeline; 30. Seventh pipeline; 31. U-tube; 311. Connecting pipe; 312. Mounting pipe; 313. Hydrogen vent hole; 32. Support rod; 33. First limiting ring; 40. Hydrogen emission control mechanism; 41. Shielding cylinder; 42. First retaining ring; 43. Second limiting ring; 44. Second retaining ring; 45. Connecting piece; 46. Limiting block. Detailed Implementation

[0017] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0018] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0019] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0020] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0021] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] See Figures 1 to 6 This embodiment provides a lossless liquid hydrogen storage system, including a liquid hydrogen container 10, a first pipeline 20, a hydrogen liquefaction device 21, a second pipeline 22, a liquid hydrogen circulation pump 23, a third pipeline 24, and a fourth pipeline 26.

[0024] One end of the first pipe 20 is connected to the top of the liquid hydrogen container 10. The input end of the hydrogen liquefaction device 21 is connected to the end of the first pipe 20 away from the liquid hydrogen container 10, and the hydrogen liquefaction device 21 is used to convert gaseous hydrogen delivered from the first pipe 20 into liquid hydrogen. The second pipe 22 is connected to the output end of the hydrogen liquefaction device 21. The input end of the liquid hydrogen circulation pump 23 is connected to the end of the second pipe 22 away from the hydrogen liquefaction device 21, and the liquid hydrogen circulation pump 23 is used to pump liquid hydrogen. The third pipe 24 is connected to the output end of the liquid hydrogen circulation pump 23, and a check valve 25 is provided on the third pipe 24. One end of the fourth pipe 26 is connected to the end of the third pipe 24 away from the liquid hydrogen circulation pump 23, and the other end of the fourth pipe 26 is connected to the bottom of the liquid hydrogen container 10. Control valves 27 are provided on the first pipe 20 and the fourth pipe 26. Specifically, the liquid hydrogen circulation pump 23 and the hydrogen liquefaction device 21 can adopt existing technology. In addition, the second pipeline 22 can be equipped with a gaseous hydrogen and liquid hydrogen separation device. After being separated, the liquid hydrogen flows into the liquid hydrogen circulation pump 23, while the gaseous hydrogen is transported back to the hydrogen liquefaction device 21 through another pipeline, so that the liquid hydrogen pumped from the liquid hydrogen circulation pump 23 into the liquid hydrogen container 10 is all liquid hydrogen.

[0025] In this embodiment, gaseous hydrogen enters the hydrogen liquefaction device 21 through the first pipe 20, is reliquefied, and then transported back to the bottom of the liquid hydrogen container 10 via the liquid hydrogen circulation pump 23, the third pipe 24, and the fourth pipe 26. This avoids waste of hydrogen resources and reduces safety risks. Furthermore, the reliquefied liquid hydrogen has a low temperature, which lowers the temperature inside the liquid hydrogen container 10, thereby slowing down the evaporation rate of the liquid hydrogen within the container 10.

[0026] In one embodiment, the lossless liquid hydrogen storage system also includes a fifth conduit 28.

[0027] One end of the fifth pipe 28 is connected to the end of the third pipe 24 away from the liquid hydrogen circulation pump 23, and the other end of the fifth pipe 28 is connected to the top of the liquid hydrogen container 10. A control valve 27 is provided on the fifth pipe 28.

[0028] In this embodiment, the liquid hydrogen pumped by the liquid hydrogen circulation pump 23 can be delivered to the bottom of the liquid hydrogen container 10 via the fourth pipe 26, or it can be delivered to the top of the liquid hydrogen container 10. The liquid hydrogen input from the top of the liquid hydrogen container 10 can mix with the liquid hydrogen inside the liquid hydrogen container 10, thereby cooling the liquid hydrogen at that location and slowing down the evaporation of liquid hydrogen.

[0029] In one embodiment, the lossless liquid hydrogen storage system further includes a sixth conduit 29, a plurality of seventh conduits 30, and a plurality of U-shaped pipes 31.

[0030] The sixth pipe 29 is closed at both ends and is connected to the fourth pipe 26. One end of each of the plurality of seventh pipes 30 is simultaneously connected to the sixth pipe 29, and the other ends of the plurality of seventh pipes 30 are inserted into the liquid hydrogen container 10. A plurality of U-shaped tubes 31 correspond one-to-one with the plurality of seventh pipes 30, and the plurality of U-shaped tubes 31 are arranged parallel to each other in the liquid hydrogen container 10, with the openings of the U-shaped tubes 31 facing upwards. The middle portion of each U-shaped tube 31 is connected to the end of the corresponding seventh pipe 30 furthest from the sixth pipe 29. The fourth pipe 26 is connected to the liquid hydrogen container 10 through the sixth pipe, the seventh pipes 30, and the U-shaped tubes 31.

[0031] In this embodiment, the liquid hydrogen pumped by the liquid hydrogen circulation pump 23 is delivered into the liquid hydrogen container 10 through the sixth pipe 29, the seventh pipe 30 and the U-shaped pipe 31. The liquid hydrogen is output from both ends of the U-shaped pipe, which can cool the liquid hydrogen in the liquid hydrogen container 10 more evenly, thereby slowing down the evaporation rate of liquid hydrogen.

[0032] In one embodiment, the lossless liquid hydrogen storage system also includes a hydrogen discharge control mechanism 40.

[0033] The U-shaped tube 31 includes a connecting tube 311 and two vertically arranged mounting tubes 312.

[0034] The middle part of the connecting pipe 311 is connected to the seventh pipe 30. The lower ends of the two mounting pipes 312 are respectively connected to the two ends of the connecting pipe 311. Multiple sets of hydrogen venting holes 313 are opened on the side wall of the mounting pipe 312; the multiple sets of hydrogen venting holes 313 are distributed along the axial direction of the mounting pipe 312; each set of hydrogen venting holes 313 is on the same horizontal plane; the hydrogen venting control mechanism 40 can control the liquid hydrogen to be discharged from one of the sets of hydrogen venting holes 313.

[0035] In this embodiment, liquid hydrogen in the connecting pipe 311 is transported to the mounting pipes 312 at both ends. Under the control of the hydrogen discharge control mechanism 40, liquid hydrogen can be discharged from the hydrogen discharge holes 313 at different heights, thereby making the liquid hydrogen at a lower temperature in the mounting pipe 312 mix more evenly with the liquid hydrogen in the liquid hydrogen container 10, and cooling the liquid hydrogen in the liquid hydrogen container 10 more evenly.

[0036] In one embodiment, a plurality of support rods 32 are connected to the lower inner wall of the mounting tube 312, and the plurality of support rods 32 are evenly distributed around the axis of the mounting tube 312; a coaxial first limiting ring 33 is also connected to the inner wall of the mounting tube 312; the first limiting ring 33 is located below the plurality of hydrogen venting holes 313 on the mounting tube 312.

[0037] The hydrogen emission control mechanism 40 includes multiple nested shielding cylinders 41, second retaining rings 44, connecting pieces 45, and limiting blocks 46.

[0038] The plurality of shielding cylinders 41 are coaxial, and a coaxial first retaining ring 42 is connected to the lower outer wall of each shielding cylinder 41, and a coaxial second limiting ring 43 is connected to the upper inner wall of each shielding cylinder 41. The second retaining ring 44 is slidably engaged with the inner wall of the inner layer of the shielding cylinder 41. After the second retaining ring 44 moves upward, it abuts against the second limiting ring 43 on the inner wall of the inner layer of the shielding cylinder 41.

[0039] The connector 45 is connected to the second retaining ring 44. After the connector 45 and the second retaining ring 44 are connected, there is still space in the middle of the second retaining ring 44 for liquid hydrogen to pass through. The limiting block 46 is slidably engaged with the inner wall of the mounting tube 312, and the lower end of the limiting block 46 is connected to the connector 45. The first retaining ring 42 on the outer layer of the plurality of shielding cylinders 41 is slidably engaged with the inner wall of the mounting tube 312 and can be moved upward to abut against the first limiting ring 33. The first retaining ring 42 of the other shielding cylinders 41 can be moved upward to abut against the second limiting ring 43 on the adjacent shielding cylinder 41. The plurality of support rods 32 can support the lower ends of the plurality of shielding cylinders 41. In this embodiment, as Figure 6The space between the limiting block 46 and the multiple blocking cylinders 41 is connected to the horizontal hydrogen discharge hole 313. When liquid hydrogen flows upward from the innermost blocking cylinder 41 and impacts the limiting block 46, the liquid hydrogen is discharged from the hydrogen discharge hole 313 at that point. Once the flow rate of the liquid hydrogen increases and the pressure increases, it causes the limiting block 46 to move upward, and part of the blocking cylinders 41 is also moved upward, blocking the outer hydrogen discharge holes 313. The liquid hydrogen inside the blocking cylinders 41 will not be discharged from the blocked hydrogen discharge holes 313, but will be discharged from the unblocked hydrogen discharge holes 313 located below the limiting block 46. This allows the pressure of liquid hydrogen inside the shielding cylinder 41 to be adjusted as needed, thereby controlling the height of the limiting block 46. This allows the liquid hydrogen inside the shielding cylinder 41 to be discharged from the hydrogen discharge holes 313 at different heights, resulting in a more uniform mixing of the lower-temperature liquid hydrogen inside the shielding cylinder 41 with the liquid hydrogen in the liquid hydrogen container 10, thereby reducing the overall temperature of the liquid hydrogen in the liquid hydrogen container 10.

[0040] In one embodiment, each of the seventh pipes 30 is equipped with a control valve 27 to control the opening and closing of the seventh pipe 30. When it is necessary to rapidly cool the liquid hydrogen in the upper part of the liquid hydrogen container 10, part of the seventh pipes 30 is closed, and the liquid hydrogen delivered by the liquid hydrogen circulation pump 23 is discharged from only one or a few U-shaped tubes 31, thereby increasing the liquid hydrogen pressure in the U-shaped tubes 31. This allows the limiting block 46 to move upward, thereby allowing the liquid hydrogen in the mounting tube 312 to be discharged from the hydrogen discharge hole 313 at the upper end of the mounting tube 312, thus cooling the upper layer of liquid hydrogen in the liquid hydrogen container 10.

[0041] In one embodiment, each set of hydrogen venting holes 313 on the mounting tube 312 includes a plurality of hydrogen venting holes 313 evenly arranged around the circumference of the mounting tube 312, so that when the liquid hydrogen in the mounting tube 312 is discharged from the hydrogen venting holes 313, it can be mixed evenly with the liquid hydrogen in the liquid hydrogen container 10.

[0042] In one embodiment, two adjacent sets of hydrogen discharge holes 313 on the same mounting tube 312 are staggered, thereby allowing the liquid hydrogen in the mounting tube 312 to be discharged in more directions, and further mixing the liquid hydrogen in the mounting tube 312 with the liquid hydrogen in the liquid hydrogen container 10.

[0043] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A lossless liquid hydrogen storage system, characterized in that, include: Liquid hydrogen container (10); A first pipe (20) is connected at one end to the top of the liquid hydrogen container (10); Hydrogen liquefaction device (21), the input end of the hydrogen liquefaction device (21) is connected to the end of the first pipeline (20) away from the liquid hydrogen container (10), the hydrogen liquefaction device (21) is used to convert gaseous hydrogen delivered from the first pipeline (20) into liquid hydrogen; The second pipe (22) is connected to the output end of the hydrogen liquefaction device (21); Liquid hydrogen circulation pump (23), the input end of which is connected to the end of the second pipeline (22) away from the hydrogen liquefaction device (21), the liquid hydrogen circulation pump (23) is used to pump liquid hydrogen; A third pipe (24) is connected to the output end of the liquid hydrogen circulation pump (23), and a check valve (25) is installed on the third pipe (24); and The fourth pipe (26) is connected at one end to the end of the third pipe (24) away from the liquid hydrogen circulation pump (23), and at the other end to the bottom of the liquid hydrogen container (10). Control valves (27) are provided on the first pipe (20) and the fourth pipe (26); The fifth pipe (28) is connected at one end to the end of the third pipe (24) away from the liquid hydrogen circulation pump (23), and at the other end to the top of the liquid hydrogen container (10). A control valve (27) is installed on the fifth pipe (28); The sixth pipe (29) is closed at both ends and is connected to the fourth pipe (26); Multiple seventh pipes (30), one end of each of the multiple seventh pipes (30) is simultaneously connected to the sixth pipe (29), and the other end of each of the multiple seventh pipes (30) is inserted into the liquid hydrogen container (10); and Multiple U-shaped tubes (31) are arranged in parallel in the liquid hydrogen container (10). The openings of the U-shaped tubes (31) are upward, and the middle part of the U-shaped tubes (31) is connected to the end of the corresponding seventh pipe (30) away from the sixth pipe (29). The lossless liquid hydrogen storage system also includes a hydrogen discharge control mechanism (40). The U-shaped tube (31) includes: A connecting pipe (311) is connected in the middle to the seventh pipe (30); as well as Two vertically arranged mounting pipes (312) are connected at their lower ends to the two ends of the connecting pipe (311). The mounting tube (312) has multiple sets of hydrogen discharge holes (313) on its side wall; the multiple sets of hydrogen discharge holes (313) are distributed along the axial direction of the mounting tube (312); each set of hydrogen discharge holes (313) is on the same horizontal plane; the hydrogen discharge control mechanism (40) can control the liquid hydrogen to be discharged from one of the sets of hydrogen discharge holes (313).

2. The lossless liquid hydrogen storage system as described in claim 1, characterized in that, Multiple support rods (32) are connected to the inner wall of the lower end of the mounting tube (312), and the multiple support rods (32) are evenly distributed around the axis of the mounting tube (312); a coaxial first limiting ring (33) is also connected to the inner wall of the mounting tube (312); the first limiting ring (33) is located below the multiple sets of hydrogen discharge holes (313) on the mounting tube (312); The hydrogen emission control mechanism (40) includes: Multiple nested shielding cylinders (41) are coaxial, and each shielding cylinder (41) has a coaxial first retaining ring (42) connected to the lower outer wall and a coaxial second limiting ring (43) connected to the upper inner wall. The second retaining ring (44) slides in cooperation with the inner wall of the inner layer of the shielding cylinder (41). The second retaining ring (44) can move upward and then abut against the second limiting ring (43) on the inner wall of the inner layer of the shielding cylinder (41). Connector (45), which is connected to the second retaining ring (44); and A limiting block (46) is provided, which slides in conjunction with the inner wall of the mounting tube (312), and the lower end of the limiting block (46) is connected to the connector (45). The first retaining ring (42) on the outer layer of the plurality of shielding cylinders (41) slides with the inner wall of the mounting tube (312) and can move upward to abut against the first limiting ring (33). The first retaining ring (42) of the other shielding cylinders (41) can move upward to abut against the second limiting ring (43) on the adjacent shielding cylinder (41). The plurality of support rods (32) can support the lower ends of the plurality of shielding cylinders (41).

3. The lossless liquid hydrogen storage system as described in claim 2, characterized in that, Each of the seventh pipes (30) is equipped with a control valve (27) to control the opening and closing of the seventh pipe (30).

4. The lossless liquid hydrogen storage system as described in claim 3, characterized in that, Each set of hydrogen vent holes (313) on the mounting tube (312) includes a plurality of hydrogen vent holes (313) evenly arranged along the circumference of the mounting tube (312).

5. A lossless liquid hydrogen storage system as described in claim 4, characterized in that, The two adjacent sets of hydrogen vent holes (313) on the same mounting pipe (312) are staggered.

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