Horizontal low-temperature liquid hydrogen storage tank

Abstract

The application discloses a horizontal low-temperature liquid hydrogen storage tank, which comprises a first tank body and a second tank body, the first tank body is sleeved outside the second tank body, and a vacuum layer is arranged between the first tank body and the second tank body; a head inner groove is arranged at both ends of an inner wall of the second tank body, and a cavity is formed between the head inner groove and the inner wall of the second tank body; the two ends of the second tank body are connected with the first tank body through first supporting mechanisms and second supporting mechanisms respectively, one end of each of the first supporting mechanisms and the second supporting mechanisms is connected with the first tank body, and the other end of each of the first supporting mechanisms and the second supporting mechanisms is inserted into the corresponding cavity of the second tank body. The first supporting mechanisms and the second supporting mechanisms are arranged at the two ends of the second tank body to support the second tank body, the contact area of the supporting mechanisms and the second tank body is reduced, the heat transfer between the second tank body and the supporting mechanisms is reduced, the heat leakage into the second tank body is effectively reduced, and the lossless storage time of liquid hydrogen in the second tank body is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of cryogenic liquid hydrogen storage tanks, and in particular to a horizontal cryogenic liquid hydrogen storage tank. Background Art

[0002] The storage density of cryogenic liquid hydrogen can reach 70.89 kg·m -3 , which is 854 times the hydrogen storage density at room temperature and pressure, and has lower requirements on the materials, quality and cost of liquid hydrogen storage tank containers. It has the advantages of high hydrogen storage density, low storage pressure, low transportation cost, fast refueling speed, high vaporization purity and good safety performance. Therefore, low-temperature liquid hydrogen storage has a high cost-effectiveness in large-scale and long-distance storage and transportation, which can effectively extend the driving range of hydrogen fuel vehicles and reduce dependence on hydrogen refueling stations. It has broad application and development prospects.

[0003] Due to the low boiling point of liquid hydrogen, it is easy to produce large evaporation losses during storage. Therefore, high requirements are placed on the thermal insulation performance of the storage container. Currently, most liquid hydrogen storage tanks are double-layer structures, and the support structure between the inner and outer containers usually adopts the traditional two-point support scheme, three-point support scheme, six-point support scheme, eight-point support scheme, and tie rod support scheme. However, these traditional support structures are thickened to meet the mechanical performance requirements, and there is a large solid heat conduction, which accounts for a large proportion of the total heat leakage of the liquid hydrogen bottle and reduces the lossless storage time of liquid hydrogen in the low-temperature storage tank. In this regard, this application proposes a horizontal low-temperature liquid hydrogen storage tank to solve this problem. Summary of the Invention

[0004] Based on this, in order to solve the problems existing in the prior art, the present application provides a horizontal cryogenic liquid hydrogen storage tank, comprising a first tank body and a second tank body, wherein the first tank body is sleeved on the outside of the second tank body, and a vacuum layer is provided between the first tank body and the second tank body;

[0005] Both ends of the inner wall of the second tank body are provided with inner grooves of the head, and a cavity recessed into the interior of the second tank body is formed between the inner groove of the head and the inner wall of the second tank body;

[0006] The two ends of the second tank body are connected to the first tank body through the first supporting mechanism and the second supporting mechanism respectively. One end of the first supporting mechanism and the second supporting mechanism is connected to the first tank body, and the other ends of the first supporting mechanism and the second supporting mechanism are inserted into the corresponding cavity of the second tank body.

[0007] Further, the first supporting mechanism comprises a first fixing plate, a first mounting piece, a first connecting piece and a first supporting piece, the first fixing plate is fixedly installed on the outer surface of the first tank body, the first mounting piece and the first supporting piece are connected through the first connecting piece, the inner wall of one end of the first mounting piece and the first supporting piece is provided with a groove, the two ends of the first connecting piece are respectively coupled with the grooves in the inner walls of the first mounting piece and the first supporting piece, the other end of the first mounting piece penetrates through the first tank body and is fixedly connected with the first fixing plate, and the other end of the first supporting piece penetrates through the second tank body and extends into the cavity.

[0008] Further, the first mounting piece, the first connecting piece and the first supporting piece are all tubular structures and have polygonal cross-sectional shapes.

[0009] Further, the pipe wall of the first supporting piece is a multi-layer structure, and there is a gap between every two layers.

[0010] Further, the second supporting mechanism comprises a second fixing plate, a second mounting piece, a second connecting piece and a second supporting piece, the second fixing plate is fixedly installed on the outer surface of the first tank body, one end of the second mounting piece is inserted into one end of the second supporting piece, and the second connecting piece is arranged between the outer wall of the second mounting piece and the inner wall of the second supporting piece, a limiting part is arranged on the position where the outer wall of the second mounting piece is in contact with the second connecting piece to limit the second connecting piece, the second connecting piece is in sliding connection with the inner wall of the second supporting piece, the other end of the second mounting piece penetrates through the first tank body and is fixedly connected with the second fixing plate, and the other end of the second supporting piece penetrates through the second tank body and extends into the cavity.

[0011] Further, the second mounting piece, the second connecting piece and the second supporting piece are all tubular structures and have circular or polygonal cross-sectional shapes.

[0012] Further, the pipe wall of the second supporting piece is a multi-layer structure, and there is a gap between every two layers.

[0013] Further, the second connecting piece is a heat insulation ring, and the thickness of the second connecting piece gradually decreases from the outer ring to the inner ring.

[0014] Further, the outer wall of the first tank body is provided with at least two groups of third supporting mechanisms, the third supporting mechanism comprises a base and a drawstring, the two ends of the base and the two ends of the drawstring are connected through a connecting assembly to form a circular ring and are sleeved on the outer wall of the first tank body.

[0015] Further, the connecting assembly comprises a cylinder, a T-shaped rod and a nut, the two end side walls of the base are both provided with the cylinder, the two ends of the drawstring are both hingedly provided with the T-shaped rod, the lower ends of the T-shaped rods at the two ends of the drawstring are inserted into the cylinders at the two ends of the base and extend out of the lower ends of the cylinders, and the outer surfaces of the T-shaped rods extending out of the lower ends of the cylinders are threadedly connected with the nuts.

[0016] Beneficial effects: By setting the first support mechanism and the second support mechanism at both ends of the second tank body to support the second tank body, compared with the traditional eight-point support scheme, the contact area of the support mechanism with the second tank body is reduced, thereby reducing the heat transfer between the second tank body and the support mechanism, effectively reducing the heat leakage into the second tank body, prolonging the lossless storage time of liquid hydrogen in the second tank body, and the structure design of the inner groove of the head on the second tank body enables the first support mechanism and the second support mechanism to extend into the inner groove of the head, and the first support and the second support adopt a multi-layer sleeve structure design, which further prolongs the heat transfer distance of the two-end support mechanism under the condition that the distance between the first tank body and the second tank body is certain, effectively improving the heat insulation performance of the support mechanism, the structure of the present application is relatively simple, reduces the consumption cost of the system, and has practical application value. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to the structures shown in these drawings without creative labor for those skilled in the art.

[0018] Figure 1 It is a three-dimensional structure schematic diagram of the horizontal low-temperature liquid hydrogen storage tank of the present application.

[0019] Figure 2 It is an assembly structure schematic diagram of the horizontal low-temperature liquid hydrogen storage tank of the present application.

[0020] Figure 3 It is a cross-sectional structure schematic diagram of the horizontal low-temperature liquid hydrogen storage tank of the present application.

[0021] Figure 4 It is an explosion diagram of the first support mechanism of the horizontal low-temperature liquid hydrogen storage tank of the present application.

[0022] Figure 5 It is an enlarged view of A in the above figure. Figure 3

[0023] Figure 6 It is an enlarged view of B in the above figure. Figure 3

[0024] ​​In the figure: 1. first tank body; 2. second tank body; 21. groove in the head; 3. first supporting mechanism; 31. first fixing plate; 32. first mounting member; 33. first connecting member; 34. first supporting member; 35. first reinforcing plate; 36. second reinforcing plate; 4. second supporting mechanism; 41. second fixing plate; 42. second mounting member; 43. second supporting member; 44. second connecting member; 45. third reinforcing plate; 46. fourth reinforcing plate; 5. third supporting mechanism; 51. base; 52. pull strap; 53. T-bar; 54. cylinder; 55. nut.

[0025] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] The horizontal cryogenic liquid hydrogen storage tank of the present application is a high-vacuum multi-layer insulated cryogenic storage tank. Its storage medium is a cryogenic working fluid, which is not limited to liquid hydrogen, but also includes liquid helium, liquid oxygen, liquid methane, liquid nitrogen, liquid argon, liquid neon, liquefied natural gas (LNG), liquefied petroleum gas (LPG) and other cryogenic liquids.

[0030] like Figure 1-Figure 3As shown, the embodiment of the present application provides a horizontal cryogenic liquid hydrogen storage tank, comprising a first tank body 1 and a second tank body 2, wherein the first tank body 1 is sleeved on the outside of the second tank body 2, and a vacuum layer is provided between the first tank body 1 and the second tank body 2;

[0031] The inner walls of both ends of the second tank body 2 are provided with a head inner groove 21, and a cavity recessed into the interior of the second tank body 2 is formed between the head inner groove 21 and the inner wall of the second tank body 2;

[0032] The two ends of the second tank body 2 are respectively connected to the first tank body 1 through the first supporting mechanism 3 and the second supporting mechanism 4. One end of the first supporting mechanism 3 and the second supporting mechanism 4 is connected to the first tank body 1, and the other ends of the first supporting mechanism 3 and the second supporting mechanism 4 are inserted into the corresponding cavity of the second tank body 2.

[0033] In this embodiment, the second tank body 2 is a low-temperature pressure vessel that can withstand the internal pressure of the container generated by the vaporization of liquid hydrogen. The first tank body 1 is sleeved on the outside of the second tank body 2 and is mainly used to provide thermal insulation protection for the second tank body 2. There is a vacuum layer between the second tank body 2 and the first tank body 1. The vacuum layer needs to be evacuated and coated with multiple layers of insulation material to reduce the influence of heat conduction and convection heat transfer of the gas inside the vacuum layer. The first support mechanism 3 and the second support mechanism 4 are arranged in the vacuum layer. In addition to supporting the second tank body 2, the first support mechanism 3 can also limit the axial rotation of the second tank body 2. The arrangement of the second support mechanism 4 allows the second tank body 2 to produce a small axial translation in the first tank body 1 to reduce the influence of thermal stress on the support mechanism due to thermal expansion and contraction between the second tank body 2 and the first tank body 1;

[0034] By arranging the first supporting mechanism 3 and the second supporting mechanism 4 at both ends of the second tank body 2 to support the second tank body 2, the contact area between the supporting mechanism and the second tank body 2 is reduced compared to the traditional eight-point support solution, thereby reducing the heat transfer between the second tank body 2 and the supporting mechanism, effectively reducing the heat leakage into the second tank body 2, and extending the lossless storage time of liquid hydrogen in the second tank body 2;

[0035] Furthermore, the structural design of the inner groove 21 of the head on the second tank body 2 enables the first supporting mechanism 3 and the second supporting mechanism 4 to extend into the inner groove 21 of the head. When the distance between the second tank body 2 and the first tank body 1 is constant, the heat transfer distance of the supporting mechanisms at both ends is further extended, and the thermal insulation performance of the supporting mechanisms is effectively improved. The present invention has a relatively simple structure, reduces the consumption cost of the system, and has practical application value.

[0036] Optionally, the cross-sectional shape of the groove 21 in the head is U-shaped.

[0037] like Figure 4-Figure 5As shown, in one embodiment, the first support mechanism 3 comprises a first fixing plate 31, a first mounting piece 32, a first connecting piece 33, and a first support piece 34, the first fixing plate 31 is fixedly installed on the outer surface of the first tank body 1, the first mounting piece 32 and the first support piece 34 are connected through the first connecting piece 33, the inner walls of the ends adjacent to the first mounting piece 32 and the first support piece 34 are respectively provided with grooves, the two ends of the first connecting piece 33 are respectively coupled with the grooves in the inner walls of the first mounting piece 32 and the first support piece 34, the other end of the first mounting piece 32 penetrates through the first tank body 1 and is fixedly connected with the first fixing plate 31, the other end of the first support piece 34 extends into the cavity through the second tank body 2, and the second tank body 2 is provided with a through hole at a position corresponding to the first support piece 34, the through hole being matched with the first support piece 34 in shape and size.

[0038] The first mounting piece 32, the first connecting piece 33, and the first support piece 34 are all tubular structures and have polygonal cross-sectional shapes.

[0039] In the embodiment, the first connecting piece 33 is made of a non-metal material having low thermal conductivity and high strength at low temperature, the cross-sectional shapes of the first mounting piece 32, the first connecting piece 33, and the first support piece 34 are all set as polygons, which is to limit the circumferential rotation of the second tank body 2 along the axis without additional anti-rotation tube or anti-rotation structure design, and the first mounting piece 32, the first connecting piece 33, and the first support piece 34 are designed as tubes to reduce the weight of the first support mechanism 3 and facilitate transportation.

[0040] The first support piece 34 extends into the groove 21 in the head, and in the case that the distance between the second tank body 2 and the first tank body 1 is certain, the heat transfer distance of the first support piece 34 at the first support mechanism 3 is further lengthened, and the heat insulation performance of the first support mechanism 3 is effectively improved.

[0041] Optionally, the cross-sectional shapes of the first mounting piece 32, the first connecting piece 33, and the first support piece 34 are regular polygons, and the first support piece 34 is made of a metal material having high strength.

[0042] In one embodiment, the pipe wall of the first support piece 34 is a multi-layer structure, and there is a gap between every two layers.

[0043] In the embodiment, the pipe wall of the first support piece 34 adopts a multi-layer structure design, which effectively increases the heat conduction path of the pipe wall of the first support piece 34, thereby reducing the heat leakage through the first support mechanism 3.

[0044] In one embodiment, a first reinforcing plate 35 is arranged between the outer wall of the first mounting piece 32 and the inner wall of the first tank body 1, and a second reinforcing plate 36 is arranged between the outer wall of the first support piece 34 and the outer wall of the second tank body 2.

[0045] In this embodiment, the first reinforcing plate 35 is fixedly connected to the outer wall of the first mounting member 32 and the inner wall of the first tank body 1, and the second reinforcing plate 36 is fixedly connected to the outer wall of the first support member 34 and the outer wall of the second tank body 2. By setting the first reinforcing plate 35, the first reinforcing plate 35 cooperates with the first fixing plate 31 to clamp the wall panel of the first tank body 1, so as to enhance the supporting strength of the first mounting member 32. By setting the second reinforcing plate 36, the supporting strength of the first support member 34 can be enhanced.

[0046] like Figure 6 As shown, in one embodiment, the second supporting mechanism 4 includes a second fixing plate 41, a second mounting member 42, a second connecting member 44 and a second supporting member 43. The second fixing plate 41 is fixedly mounted on the outer surface of the first tank body 1, one end of the second mounting member 42 is inserted into one end of the second supporting member 43, and a second connecting member 44 is provided between the outer wall of the second mounting member 42 and the inner wall of the second supporting member 43. A limiting portion is provided at a position where the outer wall of the second mounting member 42 contacts the second connecting member 44 to limit the second connecting member 44. The second connecting member 44 is slidably connected to the inner wall of the second supporting member 43. The other end of the second mounting member 42 passes through the first tank body 1 and is fixedly connected to the second fixing plate 41. The other end of the second supporting member 43 passes through the second tank body 2 and extends into the cavity. A through hole matching the shape and size of the second supporting member 43 is provided at a position of the second tank body 2 corresponding to the second supporting member 43.

[0047] The second mounting member 42 , the second connecting member 44 and the second supporting member 43 are all tubular structures and have circular or polygonal cross-sectional shapes.

[0048] In this embodiment, the second mounting member 42, the second connecting member 44, and the second supporting member 43 are all tubular structures with circular or polygonal cross-sectional shapes, and the second connecting member 44 is slidably connected to the inner wall of the second supporting member 43. When the second tank body 2 expands or contracts due to heat, the second tank body 2 can be translated along the axis to reduce the influence of thermal stress.

[0049] Optionally, the cross-sectional shape of the second mounting member 42, the second connecting member 44 and the second supporting member 43 is a circle or a regular polygon;

[0050] The second support member 43 extends into the groove 21 in the head, further extending the heat transfer distance of the second support member 43 at the second support mechanism 4 when the distance between the second tank body 2 and the first tank body 1 is constant, effectively improving the insulation performance of the second support mechanism 4.

[0051] In one embodiment, the tube wall of the second support member 43 is a multi-layer structure, and there is a gap between every two layers.

[0052] In this embodiment, the tube wall of the second support member 43 adopts a multi-layer structure design, which effectively increases the heat conduction path of the tube wall of the second support member 43, thereby reducing the heat leakage through the second support mechanism 4.

[0053] In one embodiment, the second connecting member 44 is a heat-insulating ring, and the thickness of the second connecting member 44 gradually decreases from the outer ring to the inner ring.

[0054] In this embodiment, the second connecting member 44 is a non-metallic ring with good thermal insulation performance and high strength at low temperatures. The configuration in which the thickness of the second connecting member 44 gradually decreases from the outer ring to the inner ring (i.e., the cross-sectional shape of the second connecting member 44 along the axis is a trapezoid) is beneficial to reducing heat leakage.

[0055] In one embodiment, a third reinforcing plate 45 is provided between the outer wall of the second mounting member 42 and the inner wall of the first tank body 1 , and a fourth reinforcing plate 46 is provided between the outer wall of the second supporting member 43 and the outer wall of the second tank body 2 .

[0056] In this embodiment, the third reinforcing plate 45 is fixedly connected to the outer wall of the second mounting member 42 and the inner wall of the first tank body 1, and the fourth reinforcing plate 46 is fixedly connected to the outer wall of the second support member 43 and the outer wall of the second tank body 2. By setting the third reinforcing plate 45, the second fixing plate 41 and the third reinforcing plate 45 cooperate to clamp the wall panel of the first tank body 1, so as to enhance the supporting strength of the second mounting member 42. By setting the fourth reinforcing plate 46, the supporting strength of the second support member 43 can be enhanced.

[0057] In one embodiment, at least two sets of third support mechanisms 5 are provided on the outer wall of the first tank body 1. The third support mechanism 5 includes a base 51 and a pull strap 52. The two ends of the base 51 and the two ends of the pull strap 52 are connected by a connecting component to form a ring and are sleeved on the outer wall of the first tank body 1.

[0058] In this embodiment, a third supporting mechanism 5 is provided below the first tank body 1. The third supporting mechanism 5 can be installed inside the vehicle compartment. The third supporting mechanism 5 can fix the first tank body 1 inside the vehicle compartment to prevent the first tank body 1 from being displaced, thereby facilitating transportation.

[0059] Optionally, the third supporting mechanism 5 is symmetrically arranged at both ends of the first tank body 1 .

[0060] In one embodiment, the connecting assembly includes a cylinder 54, a T-shaped rod 53 and a nut 55. The cylinder 54 is installed on the side walls at both ends of the base 51, and the T-shaped rod 53 is hinged at both ends of the pull belt 52. The lower ends of the T-shaped rod 53 at both ends of the pull belt 52 are correspondingly inserted into the cylinder 54 at both ends of the base 51 and extend out of the lower end of the cylinder 54. The outer surface of the T-shaped rod 53 extending out of the lower end of the cylinder 54 is threadedly connected with a nut 55.

[0061] In this embodiment, during installation, the first tank body 1 is first placed on the base 51, and then the lower end of the T-shaped rod 53 on the pull strap 52 is inserted into the corresponding cylinder 54, and then the nut 55 is screwed on the lower end of the T-shaped rod 53, so that the pull strap 52 is continuously tightened, thereby achieving the purpose of fixing the first tank body 1.

[0062] In one embodiment, the second tank body 2 and the inner groove 21 of the head are made of S31603 stainless steel, the first tank body 1 is made of S30408 ​​stainless steel, and the first connecting member 33 is made of epoxy glass fiber reinforced plastic. Finite element analysis is performed to determine the cross-sectional shape of the first support mechanism 3. The results are as follows:

[0063] Table 1 Calculation results under different cross-sectional shapes of the first support mechanism

[0064]

[0065] It can be seen from Table 1 that the first connecting member 33 (glass fiber reinforced plastic) structure of the first support mechanism 3 under the rectangular and trapezoidal cross-section schemes cannot pass the strength check. Among the cross-section schemes that can meet the strength requirements, the heat leakage through the first support mechanism 3 under the regular hexagonal cross-section scheme is 5.41W, which is less than the heat leakage under the circular cross-section. Therefore, the regular hexagonal cross-section scheme is adopted for the first support mechanism 3.

[0066] In one embodiment, the second tank body 2 and the inner groove 21 of the head are made of S31603 stainless steel, the first tank body 1 is made of S30408 ​​stainless steel, and the second connecting member 44 is made of epoxy fiberglass. Finite element analysis is performed to determine the cross-sectional shape of the second connecting member 44. The results are as follows:

[0067] Table 2 Calculation results under different cross-sectional shapes of the second connecting member

[0068]

[0069]

[0070] Table 2 shows that the stainless steel structure of the liquid hydrogen bottle and the structure of the second connector 44 meet the strength verification requirements under all four cross-section schemes. The inverted trapezoidal cross-section scheme for the second connector 44 has the lowest heat leakage through the second support mechanism 4, at 6.74 W. Therefore, the inverted trapezoidal cross-section scheme was adopted for the second connector 44 in the second support mechanism 4.

[0071] In one embodiment, the finite element analysis results of the first support member 34 and the second support member 43 are comprehensively compared when the tube wall adopts a multi-layer structure and extends into the interior of the groove 21 of the head and when the structure is not adopted. The results are as follows:

[0072] Table 3 Calculation results under different structural types

[0073]

[0074] It can be seen from Table 3 that the multi-layer structure and the structural form extending into the groove 21 in the head can indeed effectively reduce the support heat leakage of the liquid hydrogen bottle, and its insulation performance is improved by about 9.8% compared with the solution without this structural form.

[0075] Therefore, the present application integrates the above gain effects, optimizes the support mechanism of the horizontal low-temperature liquid hydrogen storage tank, effectively improves the insulation performance of the support mechanism, reduces the heat leakage of the second tank body 2, and extends the lossless storage time of liquid hydrogen in the second tank body 2. The structure of the present invention is relatively simple, easy to implement technically, reduces the consumption cost of the system, and has practical application value.

[0076] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A horizontal cryogenic liquid hydrogen storage tank, characterized in that: include: a first tank body and a second tank body, wherein the first tank body is sleeved on the outside of the second tank body, and a vacuum layer is provided between the first tank body and the second tank body; Both ends of the inner wall of the second tank body are provided with inner grooves of the head, and a cavity recessed into the interior of the second tank body is formed between the inner grooves of the head and the inner wall of the second tank body; Both ends of the second tank body are connected to the first tank body through a first supporting mechanism and a second supporting mechanism respectively, one end of the first supporting mechanism and the second supporting mechanism are connected to the first tank body, and the other ends of the first supporting mechanism and the second supporting mechanism are inserted into the corresponding cavity of the second tank body; The first supporting mechanism includes a first fixing plate, a first mounting member, a first connecting member, and a first supporting member, wherein the first fixing plate is fixedly mounted on the outer surface of the first tank body, the first mounting member and the first supporting member are connected via the first connecting member, a groove is provided on the inner wall of one end of the first mounting member adjacent to the first supporting member, two ends of the first connecting member are respectively coupled with the grooves of the first mounting member and the inner wall of the first supporting member, the other end of the first mounting member passes through the first tank body and is fixedly mounted on the first fixing plate, and the other end of the first supporting member passes through the second tank body and extends into the interior of the cavity; The first mounting member, the first connecting member, and the first supporting member are all tubular structures and have polygonal cross-sectional shapes; The second supporting mechanism includes a second fixing plate, a second mounting member, a second connecting member and a second supporting member, the second fixing plate being fixedly mounted on the outer surface of the first tank body, one end of the second mounting member being inserted into one end of the second supporting member, and a second connecting member being provided between the outer wall of the second mounting member and the inner wall of the second supporting member, a limiting portion being provided at a position where the outer wall of the second mounting member contacts the second connecting member to limit the second connecting member, the second connecting member being slidably connected to the inner wall of the second supporting member, the other end of the second mounting member passing through the first tank body and being fixedly connected to the second fixing plate, and the other end of the second supporting member passing through the second tank body and extending into the interior of the cavity; The second connecting member is a heat-insulating ring, and the thickness of the second connecting member gradually decreases from the outer ring to the inner ring.

2. The horizontal cryogenic liquid hydrogen storage tank according to claim 1, characterized in that: The tube wall of the first support member is a multi-layer structure, and there is a gap between every two layers.

3. The horizontal cryogenic liquid hydrogen storage tank according to claim 1, characterized in that: The second mounting member, the second connecting member, and the second supporting member are all tubular structures and have circular or polygonal cross-sectional shapes.

4. The horizontal cryogenic liquid hydrogen storage tank according to claim 1, characterized in that: The tube wall of the second support member is a multi-layer structure, and there is a gap between every two layers.

5. The horizontal cryogenic liquid hydrogen storage tank according to claim 1, characterized in that: At least two sets of third support mechanisms are provided on the outer wall of the first tank body. The third support mechanism includes a base and a drawstring. The two ends of the base and the two ends of the drawstring are connected by a connecting component to form a ring and are sleeved on the outer wall of the first tank body.

6. The horizontal cryogenic liquid hydrogen storage tank according to claim 5, characterized in that: The connecting assembly includes a cylinder, a T-shaped rod and a nut. The cylinder is installed on the side walls at both ends of the base. T-shaped rods are hinged at both ends of the pull belt. The lower ends of the T-shaped rods at both ends of the pull belt are correspondingly inserted into the cylinders at both ends of the base and extend out of the lower ends of the cylinders. The outer surface of the T-shaped rod extending out of the lower end of the cylinder is threadedly connected with a nut.

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