Liquid hydrogen storage tank

Abstract

The utility model provides a liquid hydrogen storage tank. The liquid hydrogen storage tank comprises an inner container and an outer container, the outer container is arranged on the periphery of the inner container in a surrounding mode, and the axis of the inner container and the axis of the outer container extend in the same direction; the first supporting structure is arranged between the inner container and the outer container, the first supporting structure comprises an inner supporting piece, an outer supporting piece and a connecting cylinder, the inner supporting piece is connected with the inner container, the outer supporting piece is connected with the outer container, the connecting cylinder is arranged between the inner supporting piece and the outer supporting piece, and the connecting cylinder is provided with a first annular outer flange; one of the first end of the inner supporting piece and the first end of the outer supporting piece is inserted into the connecting cylinder and abuts against the bottom wall of the connecting cylinder, and the other one of the first end of the inner supporting piece and the first end of the outer supporting piece abuts against the first annular outer flanging. Through the technical scheme provided by the invention, the problem of large heat leakage at the supporting structure in the related technology can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure vessels, and in particular to a liquid hydrogen storage tank. Background Art

[0002] With the development of society, environmental protection is becoming more and more important, especially in the field of energy. In recent years, new energy has shown a blowout development. Hydrogen energy has the advantages of high heat and no pollution, and is an indispensable future energy. According to the state of hydrogen, the transportation of hydrogen is divided into gaseous hydrogen transportation and liquid hydrogen transportation. However, the transportation of gaseous hydrogen is based on high-pressure gas hydrogen long tube trailers, and its transportation volume is very small, and the transportation economic radius is small, which is not suitable for large-scale transportation of hydrogen energy.

[0003] In the related art, liquid hydrogen is mainly transported by transport tanks, which include an inner container and an outer container. A vacuum heat transfer structure is formed between the inner container and the outer container. At the same time, a support structure is provided between the inner container and the outer container.

[0004] However, since the temperature of liquid hydrogen is very low, large heat leakage occurs at the support structure, which will cause the liquid hydrogen to vaporize and increase the pressure of the inner container. At the same time, it will cause the local temperature of the outer container to be too low, resulting in condensation and frost problems. Utility Model Content

[0005] The utility model provides a liquid hydrogen storage tank to solve the problem of large heat leakage at a supporting structure in the related technology.

[0006] The utility model provides a liquid hydrogen storage tank, which comprises: an inner container; an outer container, which is arranged around the outer periphery of the inner container, and the axis of the inner container and the axis of the outer container extend in the same direction; a first support structure, which is arranged between the inner container and the outer container, and the first support structure comprises an inner support member, an outer support member and a connecting tube, the inner support member is connected to the inner container, the outer support member is connected to the outer container, the connecting tube is arranged between the inner support member and the outer support member, the connecting tube has a first annular outer flange, one of the first end of the inner support member and the first end of the outer support member is inserted into the connecting tube and abuts against the bottom wall of the connecting tube, and the other of the first end of the inner support member and the first end of the outer support member abuts against the first annular outer flange.

[0007] Furthermore, the first annular outer flange has a receiving groove, and the first end of the inner support member and the other of the first ends of the outer support member are inserted into the receiving groove and abut against the bottom wall of the receiving groove.

[0008] Furthermore, the first annular outer flange includes an annular plate and a retaining ring, the retaining ring is connected to the outer edge of the annular plate, the inner edge of the annular plate is connected to the connecting tube, and the annular plate, the retaining ring and the connecting tube together form a receiving groove.

[0009] Furthermore, the first support structure also includes an inner fixing seat arranged on the inner container, the inner fixing seat has an inner mounting groove, and the second end of the inner support member is inserted into the inner mounting groove and connected to the inner fixing seat; and / or, the first support structure also includes an outer fixing seat arranged on the outer container, the outer fixing seat protrudes outward from the outer wall of the outer container, the outer fixing seat has an outer mounting groove, and the second end of the outer support member is inserted into the outer mounting groove and connected to the outer fixing seat.

[0010] Furthermore, the inner support member and the outer support member are both annular structures; and / or, the inner support member and the outer support member are both made of epoxy glass fiber reinforced plastics.

[0011] Furthermore, the inner container includes an inner cylinder and inner heads arranged at both ends of the inner cylinder, the outer container includes an outer cylinder and outer heads arranged at both ends of the outer cylinder, the axis of the inner cylinder and the axis of the outer cylinder extend in the same direction, and the first support structure is arranged between the inner cylinder and the outer cylinder.

[0012] Furthermore, there are multiple first support structures, and the multiple first support structures are arranged at intervals along the circumference of the inner cylinder.

[0013] Furthermore, the liquid hydrogen storage tank also includes a second support structure with adjustable length, the second support structure is arranged between the inner head and the outer head, the first end of the second support structure is hinged to the inner head, and the second end of the second support structure is hinged to the outer head.

[0014] Furthermore, the second supporting structure includes a supporting tube and a supporting rod that cooperate with each other, the first end of the supporting tube is hinged to the inner head, the first end of the supporting rod is hinged to the outer head, and the second end of the supporting rod is inserted into the supporting tube and can move relative to the supporting tube; the second supporting structure also includes a load-bearing ring, which is arranged between the supporting tube and the supporting rod, and the two ends of the load-bearing ring are respectively abutted against the supporting tube and the supporting rod; the second end of the supporting tube is provided with an annular inner flange, the second end of the supporting rod has a second annular outer flange, the load-bearing ring is sleeved on the outer periphery of the supporting rod, and the two ends of the load-bearing ring are respectively abutted against the annular inner flange and the second annular outer flange.

[0015] Furthermore, the outer head has a support protruding outward, the support has an avoidance hole, the first end of the support rod is inserted into the avoidance hole and hinged to the support; and / or, an ear seat is provided on the outer wall of the inner head, and the first end of the support tube is hinged to the ear seat.

[0016] By applying the technical solution of the utility model, the liquid hydrogen storage tank includes an inner container, an outer container and a first support structure. After the inner container is filled with liquid hydrogen, the heat transfer path is from the inner container to the inner support, from the inner support to the bottom wall of the connecting tube, and then through the bottom wall of the connecting tube along the cylinder of the connecting tube to the first annular outer flange, then through the first annular outer flange to the outer support, and then through the outer support to the outer container. The heat transfer path between the inner container and the outer container is extended, thereby reducing the heat leakage at the first support structure, avoiding the vaporization of liquid hydrogen in the inner container and the problem of condensation and frost in the outer container. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a liquid hydrogen storage tank provided according to an embodiment of the utility model is shown;

[0019] Figure 2 A cross-sectional view of a liquid hydrogen storage tank provided according to an embodiment of the utility model is shown;

[0020] Figure 3 Shows Figure 2 A partial enlarged view of the middle A;

[0021] Figure 4 A cross-sectional view of a liquid hydrogen storage tank provided according to an embodiment of the utility model is shown;

[0022] Figure 5 Shows Figure 4 A partial enlarged view of point B in the middle.

[0023] The above drawings include the following reference numerals:

[0024] 10. Inner container; 11. Inner cylinder; 12. Inner head; 121. Ear seat;

[0025] 20. outer container; 21. outer cylinder; 22. outer head; 221. support;

[0026] 30. First support structure; 31. Inner support member; 32. Outer support member; 33. Connecting tube; 331. First annular outer flange; 3311. Annular flat plate; 3312. Retaining ring; 34. Inner fixing seat; 35. Outer fixing seat;

[0027] 40. Second supporting structure; 41. Support tube; 42. Support rod; 43. Load-bearing ring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0029] like Figures 1 to 5 As shown, an embodiment of the utility model provides a liquid hydrogen storage tank, which includes an inner container 10, an outer container 20 and a first support structure 30. The outer container 20 is arranged around the outer periphery of the inner container 10, and the axis of the inner container 10 and the axis of the outer container 20 extend in the same direction; the first support structure 30 is arranged between the inner container 10 and the outer container 20, and the first support structure 30 includes an inner support member 31, an outer support member 32 and a connecting cylinder 33. The inner support member 31 is connected to the inner container 10, and the outer support member 32 is connected to the outer container 20. The connecting cylinder 33 is arranged between the inner support member 31 and the outer support member 32. The connecting cylinder 33 has a first annular outer flange 331. One of the first end of the inner support member 31 and the first end of the outer support member 32 is inserted into the connecting cylinder 33 and abuts against the bottom wall of the connecting cylinder 33, and the other of the first end of the inner support member 31 and the first end of the outer support member 32 abuts against the first annular outer flange 331.

[0030] By applying the technical solution of the utility model, the liquid hydrogen storage tank includes an inner container 10, an outer container 20 and a first support structure 30. After the inner container 10 is filled with liquid hydrogen, the heat transfer path is from the inner container 10 to the inner support 31, and from the inner support 31 to the bottom wall of the connecting cylinder 33, and then to the first annular outer flange 331 along the cylinder body of the connecting cylinder 33 through the bottom wall of the connecting cylinder 33, and then to the outer support 32 through the first annular outer flange 331, and then to the outer container 20 through the outer support 32. The heat transfer path between the inner container 10 and the outer container 20 is extended, thereby reducing the heat leakage at the first support structure 30, avoiding the vaporization of liquid hydrogen in the inner container 10, and the problem of condensation and frost in the outer container 20.

[0031] In the related art, the support structure between the inner container 10 and the outer container 20 is directly supported by a support tube, and the heat transfer path is short, and the heat is directly transferred from the inner container 10 and the support tube to the outer container 20, so there is a large amount of heat leakage.

[0032] Among them, since the inner support member 31 is in abutment with the connecting tube 33, and the outer support member 32 is in abutment with the first annular outer flange 331, after the inner container 10 is filled with liquid hydrogen, the inner container 10 shrinks when it is cold, and the inner support member 31 can move relative to the connecting tube 33. Similarly, the outer support member 32 can also move relative to the connecting tube 33 to cooperate with the contraction and expansion of the inner container 10.

[0033] like Figure 2 and Figure 3 As shown, the first annular outer flange 331 has a receiving groove, and the first end of the inner support member 31 and the other of the first ends of the outer support member 32 are inserted into the receiving groove and abut against the bottom wall of the receiving groove. The outer support member 32 is accommodated by the receiving groove, which can prevent the outer support member 32 from separating from the connecting tube 33 and prevent the support structure from failing.

[0034] like Figure 3 As shown, the first annular outer flange 331 includes an annular flat plate 3311 and a retaining ring 3312. The retaining ring 3312 is connected to the outer edge of the annular flat plate 3311. The inner edge of the annular flat plate 3311 is connected to the connecting tube 33. The annular flat plate 3311, the retaining ring 3312 and the connecting tube 33 together form a receiving groove. The first annular outer flange 331 with the above structure has the advantages of simple structure and easy processing.

[0035] like Figure 2 and Figure 3 As shown, the first support structure 30 also includes an inner fixing seat 34 arranged on the inner container 10, and the inner fixing seat 34 has an inner mounting groove. The second end of the inner support member 31 is inserted into the inner mounting groove and connected to the inner fixing seat 34. By inserting the inner support member 31 in the inner mounting groove, the length of the inner support member 31 can be extended, thereby extending the heat transfer path and further reducing heat leakage.

[0036] like Figure 3 As shown, the first support structure 30 further includes an outer fixing seat 35 disposed on the outer container 20, the outer fixing seat 35 protrudes outward from the outer wall of the outer container 20, and the outer fixing seat 35 has an outer mounting groove, and the second end of the outer support member 32 is inserted into the outer mounting groove and connected to the outer fixing seat 35. By setting the outer fixing seat 35 as an outwardly protruding structure, the length of the outer support member 32 can be extended, thereby extending the heat transfer path, and further reducing the heat leakage.

[0037] Among them, the inner support member 31 and the outer support member 32 are both annular structures. By adopting the above annular structure, the weight of the inner support member 31 and the outer support member 32 can be reduced while ensuring the structural strength, thereby reducing the weight of the first support structure 30.

[0038] In this embodiment, the inner support member 31 and the outer support member 32 are both made of epoxy glass fiber reinforced plastics. The epoxy glass fiber reinforced plastics material can have a lower heat transfer coefficient while ensuring the structural strength, thereby weakening the heat transfer and reducing the heat transfer amount.

[0039] like Figure 1 , Figure 2 as well as Figure 4 As shown, the inner container 10 includes an inner cylinder 11 and inner heads 12 disposed at both ends of the inner cylinder 11, the outer container 20 includes an outer cylinder 21 and outer heads 22 disposed at both ends of the outer cylinder 21, the axis of the inner cylinder 11 and the axis of the outer cylinder 21 extend in the same direction, and the first support structure 30 is disposed between the inner cylinder 11 and the outer cylinder 21. With the above structure, the space between the inner cylinder 11 and the outer cylinder 21 can be fully utilized to arrange the first support structure 30.

[0040] In this embodiment, the first support structure 30 extends radially along the inner cylinder 11, so that the inner container 10 can shrink and expand relative to the outer container 20, but the inner container 10 and the outer container 20 cannot move axially relative to each other at this point.

[0041] like Figure 1 As shown, there are multiple first support structures 30, and the multiple first support structures 30 are arranged at intervals along the circumference of the inner cylinder 11. The multiple first support structures 30 can be used to position the inner container 10 to prevent the inner container 10 from rotating relative to the outer container 20.

[0042] In this embodiment, the first support structure 30 uses four circumferential groups to limit the lateral movement of the inner container 10. The two top groups have an angle of 45°, and the two bottom groups have an angle of 58°. The 45° angle at the top can meet the movement trend caused by the lateral and upward loads of the tank during transportation, and the optimal load-bearing angle of the two bottom groups is determined by calculation.

[0043] like Figure 1 As shown, the liquid hydrogen storage tank further includes a second support structure 40 with adjustable length, which is disposed between the inner head 12 and the outer head 22, wherein a first end of the second support structure 40 is hinged to the inner head 12, and a second end of the second support structure 40 is hinged to the outer head 22. By adjusting the length of the second support structure 40, the inner container 10 can move axially relative to the outer container 20, thereby achieving the contraction and expansion of the inner container 10.

[0044] In this embodiment, since the second support structure 40 is arranged between the inner head 12 and the outer head 22, the vertical interval between the inner head 12 and the outer head 22 is fully utilized, so that multiple second support structures 40 can be arranged, and the length of the second support structure 40 is extended to extend its heat transfer distance to reduce the heat leakage at the second support structure 40, thereby reducing the heat dissipation from the inner container 10 to the outer container 20, so that the outer container 20 will not produce condensation and frost problems.

[0045] In this embodiment, by providing a plurality of second support structures 40 , the cross-sectional size of a single second support structure 40 can be reduced, thereby reducing its heat transfer area, thereby reducing the heat leakage of the second support structure 40 .

[0046] like Figure 4 and Figure 5 As shown, the second support structure 40 includes a supporting tube 41 and a supporting rod 42, the first end of the supporting tube 41 is hinged to the inner head 12, the first end of the supporting rod 42 is hinged to the outer head 22, and the second end of the supporting rod 42 is inserted into the supporting tube 41 and can move relative to the supporting tube 41. The second support structure 40 with the above structure can make the inner container 10 move relative to the outer container 20 after the inner container 10 is cooled and shrinks after being filled with liquid hydrogen, so as to reduce the stress between the inner container 10 and the outer container 20.

[0047] The support and cooperation between the support tube 41 and the support rod 42 refers to the formation of an axial force support between the support tube 41 and the support rod 42. For example, the support tube 41 and the support rod 42 are connected by a non-self-locking thread, and when the inner container 10 and the outer container 20 move relative to each other, the axial force provided during the movement can cause the support tube 41 and the support rod 42 to move relative to each other.

[0048] like Figure 5 As shown, the second support structure 40 further includes a bearing ring 43, which is disposed between the support tube 41 and the support rod 42, and the two ends of the bearing ring 43 are respectively in contact with the support tube 41 and the support rod 42. The bearing ring 43 can form a force transmission relationship, so that when the inner container 10 moves relative to the outer container 20, the force between the inner container 10 and the outer container 20 is transmitted to the outer container 20 by the support tube 41, the bearing ring 43 and the support rod 42.

[0049] Specifically, the second end of the support tube 41 is provided with an annular inner flange, the second end of the support rod 42 is provided with a second annular outer flange, the bearing ring 43 is sleeved on the outer periphery of the support rod 42, and the two ends of the bearing ring 43 are respectively abutted against the annular inner flange and the second annular outer flange. With the above structure, the bearing ring 43 is supported by the first annular inner flange and the second annular outer flange, which has the advantages of simple structure and easy setting.

[0050] In this embodiment, when the inner container 10 moves relative to the outer container 20, the support rods 42 extend relative to the support tube 41. Since the load-bearing ring 43 is arranged between the first annular inner flange and the second annular outer flange, the load-bearing ring 43 is subjected to pressure, so that the load-bearing ring 43 always plays a supporting role.

[0051] like Figure 5 As shown, the outer head 22 has a support 221 protruding outward, and the support 221 has an avoidance hole. The first end of the support rod 42 is inserted into the avoidance hole and hinged to the support 221. The use of the support 221 can save space between the inner head 12 and the outer head 22, so that the second support structure 40 has a larger setting space. At the same time, the hinged mode of the support has the advantage of easy installation.

[0052] like Figure 5 As shown, an ear seat 121 is provided on the outer wall of the inner head 12, and the first end of the support tube 41 is hinged to the ear seat 121. The hinged connection of the ear seat 121 has the advantage of being easy to process and install.

[0053] The bearing ring 43 is made of epoxy glass fiber reinforced plastic.

[0054] Specifically, the heat is transferred to the support tube 41 through the ear seat 121, and is transferred to the first annular inner flange along the axial direction of the support tube 41, and is transferred to the bearing ring 43 through the first annular inner flange, and is transferred to the second annular outer flange along the axial direction of the bearing ring 43, and is then transferred to the support rod 42, and is transferred to the outer container 20 through the support rod 42. The heat transfer path is greatly extended, and the heat leakage at the second support structure 40 is further reduced.

[0055] In this embodiment, the first support structure 30 is the fixed end of the inner container 10. Affected by the impact load, the longitudinal, circumferential and lateral displacements of the inner container 10 need to be limited. Therefore, it is designed as a slot structure. The second support structure 40 is the movable end of the inner container 10. It adopts a rotary pull rod structure and achieves the purpose of thermal insulation through a group of maze structures. The two ends of the maze are connected to the pin shaft, and the connection can rotate freely. When the inner container 10 shrinks due to the temperature, the axis position of the pin shaft connected to the outer container 20 remains unchanged, and the pin shaft connected to the inner container 10 moves forward. When the tank is filled with liquid, the inner support member 31 and the outer support member 32 are both perpendicular to the axis of the inner container 10.

[0056] The liquid hydrogen storage tank provided in this embodiment is used to realize the storage and transportation of vacuum insulated liquid hydrogen at room temperature, which solves the problem that the existing cryogenic containers cannot effectively store liquid hydrogen medium. The storage and transportation time of liquid hydrogen in the tank box can exceed 20 days, which is 3 times higher than the existing indicator, meets its industrial application requirements, and creates basic conditions for the application of liquid hydrogen.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0059] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0062] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A liquid hydrogen storage tank, characterized in that: The liquid hydrogen storage tank comprises: Inner container (10); An outer container (20) is arranged around the outer periphery of the inner container (10), and the axis of the inner container (10) and the axis of the outer container (20) extend in the same direction; A first support structure (30) is arranged between the inner container (10) and the outer container (20), and the first support structure (30) includes an inner support member (31), an outer support member (32) and a connecting tube (33). The inner support member (31) is connected to the inner container (10), and the outer support member (32) is connected to the outer container (20). The connecting tube (33) is arranged between the inner support member (31) and the outer support member (32). The connecting tube (33) has a first annular outer flange (331). One of the first end of the inner support member (31) and the first end of the outer support member (32) is inserted into the connecting tube (33) and abuts against the bottom wall of the connecting tube (33), and the other of the first end of the inner support member (31) and the first end of the outer support member (32) abuts against the first annular outer flange (331).

2. The liquid hydrogen storage tank according to claim 1, characterized in that: The first annular outer flange (331) has a receiving groove, and the other of the first end of the inner support member (31) and the first end of the outer support member (32) is inserted into the receiving groove and abuts against the bottom wall of the receiving groove.

3. The liquid hydrogen storage tank according to claim 2, characterized in that: The first annular outer flange (331) includes an annular plate (3311) and a retaining ring (3312), wherein the retaining ring (3312) is connected to the outer edge of the annular plate (3311), and the inner edge of the annular plate (3311) is connected to the connecting tube (33), and the annular plate (3311), the retaining ring (3312) and the connecting tube (33) together form the accommodating groove.

4. The liquid hydrogen storage tank according to claim 1, characterized in that: The first supporting structure (30) further comprises an inner fixing seat (34) arranged on the inner container (10), the inner fixing seat (34) having an inner mounting groove, the second end of the inner supporting member (31) being inserted into the inner mounting groove and connected to the inner fixing seat (34); and / or, The first supporting structure (30) further comprises an external fixing seat (35) arranged on the outer container (20), wherein the external fixing seat (35) protrudes outward from the outer wall of the outer container (20), and the external fixing seat (35) has an external mounting groove, and the second end of the external support member (32) is inserted into the external mounting groove and connected to the external fixing seat (35).

5. The liquid hydrogen storage tank according to claim 1, characterized in that: The inner support member (31) and the outer support member (32) are both annular structures; and / or, The inner support member (31) and the outer support member (32) are both made of epoxy glass fiber reinforced plastic.

6. The liquid hydrogen storage tank according to claim 1, characterized in that: The inner container (10) comprises an inner cylinder (11) and inner heads (12) arranged at both ends of the inner cylinder (11); the outer container (20) comprises an outer cylinder (21) and outer heads (22) arranged at both ends of the outer cylinder (21); the axis of the inner cylinder (11) and the axis of the outer cylinder (21) extend in the same direction; and the first supporting structure (30) is arranged between the inner cylinder (11) and the outer cylinder (21).

7. The liquid hydrogen storage tank according to claim 6, characterized in that: There are a plurality of the first supporting structures (30), and the plurality of the first supporting structures (30) are arranged at intervals along the circumferential direction of the inner cylinder (11).

8. The liquid hydrogen storage tank according to claim 6, characterized in that: The liquid hydrogen storage tank further comprises a second support structure (40) with adjustable length, wherein the second support structure (40) is arranged between the inner head (12) and the outer head (22), wherein a first end of the second support structure (40) is hingedly connected to the inner head (12), and a second end of the second support structure (40) is hingedly connected to the outer head (22).

9. The liquid hydrogen storage tank according to claim 8, characterized in that: The second supporting structure (40) comprises a supporting tube (41) and a supporting rod (42) that are supported and matched, the first end of the supporting tube (41) being hinged to the inner head (12), the first end of the supporting rod (42) being hinged to the outer head (22), and the second end of the supporting rod (42) being inserted into the supporting tube (41) and being movable relative to the supporting tube (41); The second supporting structure (40) further comprises a bearing ring (43), wherein the bearing ring (43) is arranged between the supporting tube (41) and the supporting rod (42), and the two ends of the bearing ring (43) are respectively in contact with the supporting tube (41) and the supporting rod (42); The second end of the support tube (41) is provided with an annular inner flange, the second end of the support rod (42) has a second annular outer flange, the load-bearing ring (43) is sleeved on the outer periphery of the support rod (42), and the two ends of the load-bearing ring (43) are respectively in contact with the annular inner flange and the second annular outer flange.

10. The liquid hydrogen storage tank according to claim 9, characterized in that: The outer sealing head (22) has a support (221) protruding outward, the support (221) has a avoidance hole, the first end of the support rod (42) is inserted into the avoidance hole and hinged to the support (221); and / or, An ear seat (121) is provided on the outer wall of the inner sealing head (12), and the first end of the support tube (41) is hinged to the ear seat (121).

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