Double-vacuum eccentric liquid hydrogen spherical tank

Abstract

The invention belongs to the technical field of liquid hydrogen storage, and particularly relates to a double-vacuum eccentric liquid hydrogen spherical tank which comprises a spherical tank outer wall, a first vacuum area and a spherical tank supporting wall, the spherical tank outer wall and the spherical tank supporting wall are vertically and eccentrically arranged, and a fixed limiting structure is arranged between the spherical tank outer wall and the spherical tank supporting wall; the first vacuum area is located between the spherical tank outer wall and the spherical tank supporting wall. A fixing frame is arranged at the lower end of the spherical tank outer wall; an inner tank is arranged in the spherical tank supporting wall, and the spherical tank outer wall and the inner tank are concentrically arranged; a second vacuum area is formed between the spherical tank supporting wall and the inner tank, and the inner tank is erected on the spherical tank supporting wall through a supporting frame structure; the supporting frame structure is used for enhancing the structural strength of the inner tank and reducing the heat conduction area; a fixed limiting structure and a supporting frame structure are arranged in the double-vacuum liquid hydrogen spherical tank, so that the effects of preventing cold leakage and failure of the liquid hydrogen spherical tank in a cryogenic environment are jointly achieved, and the cold leakage amount is reduced while the storage amount is guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of liquid hydrogen storage, and particularly relates to a double-vacuum eccentric liquid hydrogen spherical tank. BACKGROUND

[0002] Hydrogen is a flammable gas at normal temperature and pressure, it is colorless and odorless and extremely difficult to dissolve in water, it is currently the smallest known gas in density, and can be widely used in chemical industry, smelting, power generation, high-end manufacturing and other aspects, and is an extremely important resource. In a conventional state, hydrogen gas directly stored and transported in a container has the problem of less single storage and transportation capacity, so it should be treated to convert it into liquid hydrogen with higher density. Liquid hydrogen is a low-temperature liquid fuel obtained by cooling hydrogen gas, and has an extremely low boiling point of about 20.37K and a freezing point of 13.96K. Compared with hydrogen gas at normal temperature, liquid hydrogen has the advantages of high density and high purity, can effectively reduce transportation cost and improve the efficiency of transportation equipment, and can be used as a clean energy with excellent performance in new energy vehicles, aerospace and other fields. Current research and exploration on liquid hydrogen mainly includes three parts: preparation, storage and application. Among them, liquid hydrogen storage is the key link of the liquid hydrogen industry chain, and liquid hydrogen storage technology is the most important in the liquid hydrogen storage system. Therefore, how to improve the existing liquid hydrogen storage technology is a key problem affecting the development of China's liquid hydrogen industry.

[0003] Liquid hydrogen storage tank is the main carrier of liquid hydrogen storage technology, and can be divided into fixed storage tank and mobile storage tank according to the use form. Among the two, the fixed storage tank can realize long-term storage of liquid hydrogen, so it is highly concerned. At present, the fixed storage tank can be divided into vertical storage tank, horizontal storage tank and spherical tank according to the shape. Compared with vertical and horizontal storage tanks, spherical tanks have the maximum capacity value under the same surface area, and are the main development direction of current fixed liquid hydrogen storage tanks. Liquid hydrogen spherical tank has very high requirement on adiabatic performance, and at present, double-layer spherical tank interlayer vacuum extraction is mostly used to improve its adiabaticity. Studies have shown that in the liquid hydrogen spherical tank, the main cold leakage modes are heat conduction and heat radiation. Therefore, in order to reduce the cold leakage of the liquid hydrogen spherical tank, the most critical method is to optimize its structure and parameters. How to reduce the cold leakage while ensuring the storage capacity is a big problem in the design of current liquid hydrogen spherical tank. SUMMARY

[0004] In view of the above problems, the application provides a double-vacuum eccentric liquid hydrogen spherical tank, which comprises a spherical tank outer wall, a first vacuum zone and a spherical tank support wall, the spherical tank outer wall and the spherical tank support wall are vertically eccentrically arranged, and a fixed limiting structure is arranged between the spherical tank outer wall and the spherical tank support wall.

[0005] The inner tank is arranged inside the spherical tank supporting wall, and the spherical tank outer wall and the inner tank are arranged concentrically.

[0006] Further, the fixed limiting structure comprises an ear, a pull rope and a tank top hollow support column; the spherical tank supporting wall is fixedly provided with the ear at the upper end in the first vacuum zone, the spherical tank outer wall is fixedly provided with the tank top hollow support column at the upper end in the first vacuum zone, and the two ends of the pull rope are connected with the tank top hollow support column and the ear respectively.

[0007] Further, the support frame structure comprises a support end, a frame strip, a reinforcing ring and an insulating pad; a plurality of frame strips are annularly surrounded on the side of the inner tank; the support end is used for connecting the inner tank and one end of the frame strip, the sides of a plurality of frame strips are fixed through the reinforcing ring; the other end of the frame strip is connected with the spherical tank supporting wall through the insulating pad, and the cross-sectional shape of the frame strip is arc-shaped.

[0008] Further, the support end comprises an insulating wheel, a top end cover plate and a hollow branch pipe; one end of the hollow branch pipe is fixedly connected with the inner tank, the insulating wheel is surrounded outside the hollow branch pipe, the top end cover plate is fixed at the upper end of the insulating wheel, and the lower end of the insulating wheel is fixedly connected with the frame strip.

[0009] Further, the insulating wheel is divided into three groups, and the number of each group is greater than or equal to six, and the insulating wheel is arranged in a whole "concave" shape.

[0010] Further, two reinforcing rings are arranged at the middle and root of the frame strip respectively.

[0011] Further, the spherical tank outer wall is made of high-strength carbon steel material, and the spherical tank supporting wall and the inner tank are made of low-temperature stainless steel material.

[0012] Further, the pull rope is made of high-density carbon fiber composite material.

[0013] Further, the outer wall of the inner tank is wound layer by layer by a plurality of layers of insulating material, low-thermal-conductivity carbon fiber and hollow glass microbeads.

[0014] Further, the winding layers of the outer wall of the inner tank are sequentially made of a composite structure of a plurality of layers of insulating material, hollow glass microbeads, a plurality of layers of insulating material and low-thermal-conductivity carbon fiber from inside to outside, and the gaps between the layers are subjected to vacuumizing treatment.

[0015] Further, the fixed frame comprises a plurality of spherical tank supporting legs, and a supporting leg pull rod is connected between every two spherical tank supporting legs.

[0016] Advantages

[0017] The advantages of the present application over the prior art are as follows:

[0018] 1. The double-vacuum eccentric liquid hydrogen spherical tank of the present application realizes the effects of preventing cold leakage and failure of the liquid hydrogen spherical tank in a cryogenic environment by means of the fixed limiting structure and the support frame structure inside the double-vacuum liquid hydrogen spherical tank, thereby reducing the amount of cold leakage while ensuring the storage capacity.

[0019] 2. The hollow branch pipe is clamped between the heat insulation wheels, so that after the inner tank is cooled and shrunk, the inner tank can drive the hollow main pipe to move transversely along the heat insulation wheel set, thereby ensuring the stability of the inner tank and avoiding the pulling force on the frame strips caused by forced shrinkage of the inner tank, which causes fatigue of the frame strips.

[0020] 3. The outer part of the inner tank is sequentially wound with a composite structure of multiple layers of heat insulation materials, hollow glass beads, multiple layers of heat insulation materials, and low-thermal-conductivity carbon fibers, and the gap between each layer of structure is subjected to vacuum extraction treatment. The multiple layers of heat insulation materials are symmetrically arranged in the north and south hemispheres, which ensures that the heat radiation can be fully reflected, and the composite multiple layers of heat insulation materials can ensure the maximum reduction of internal cold leakage through radiation.

[0021] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by means of the structures indicated in the description, claims, and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0023] Figure 1 A front view of the liquid hydrogen spherical tank of the present application is shown.

[0024] Figure 2 A structure diagram of the support end in the embodiment of the present application is shown.

[0025] Figure 3 A top view of the arrangement of the inner tank and the support end in the embodiment of the present application is shown.

[0026] Figure 4 A structure diagram of the frame strip and the reinforcing ring in the embodiment of the present application is shown.

[0027] Figure 5 A schematic diagram of the composite multi-layer structure of the inner tank outside in the embodiment of the application is shown.

[0028] In the figure, 1, spherical tank outer wall; 2, first vacuum zone; 3, spherical tank support wall; 4, fixed limiting structure; 41, lifting lug; 42, pull rope; 43, tank top hollow support column; 5, fixed frame; 51, spherical tank support leg; 52, support leg pull rod; 6, inner tank; 7, second vacuum zone; 8, support frame structure; 81, support end; 811, heat insulation wheel; 812, top end cover plate; 813, hollow support pipe; 82, frame strip; 83, reinforcing ring; 84, heat insulation pad. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are some but not all of the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the application.

[0030] The application provides a double-vacuum eccentric liquid hydrogen spherical tank, which comprises a spherical tank outer wall 1, a first vacuum zone 2 and a spherical tank support wall 3, the spherical tank outer wall 1 and the spherical tank support wall 3 are vertically and eccentrically arranged, and a fixed limiting structure 4 is arranged between the spherical tank outer wall 1 and the spherical tank support wall 3; the first vacuum zone 2 is located between the spherical tank outer wall 1 and the spherical tank support wall 3; a fixed frame 5 is arranged at the lower end of the spherical tank outer wall 1;

[0031] An inner tank 6 is arranged in the spherical tank support wall 3, the inner tank 6 is concentrically arranged with the spherical tank outer wall 1, a second vacuum zone 7 is formed between the spherical tank support wall 3 and the inner tank 6, and the inner tank 6 is arranged on the spherical tank support wall 3 through a support frame structure 8; the support frame structure 8 is used for strengthening the structural strength of the inner tank 6 and reducing the heat conduction area;

[0032] The fixed limiting structure 4 comprises a lifting lug 41, a pull rope 42 and a tank top hollow support column 43; the lifting lug 41 is fixedly arranged at the upper end of the spherical tank support wall 3 in the first vacuum zone 2, the tank top hollow support column 43 is fixedly arranged at the upper end of the spherical tank outer wall 1 in the first vacuum zone 2, and the two ends of the pull rope 42 are respectively connected to the tank top hollow support column 43 and the lifting lug 41;

[0033] The support frame structure 8 comprises support ends 81, frame strips 82, reinforcing rings 83 and heat insulation pads; a plurality of frame strips 82 are annularly arranged on the side of the inner tank 6; the support ends 81 are used for connecting the inner tank 6 and one end of the frame strip 82; the side of the frame strip 82 is fixed through the reinforcing ring; the other end of the frame strip 82 is connected with the spherical tank support wall 3 through the heat insulation pad; the cross section of the frame strip 82 is arc-shaped; two reinforcing rings 83 are arranged at the middle and root of the frame strip 82 respectively; the fixed frame 5 comprises spherical tank support legs 51, and a support leg pull rod 52 is arranged between every two spherical tank support legs 51.

[0034] Reference Figure 1 and Figure 4 , Figure 1 The figure shows the front view of the liquid hydrogen spherical tank, wherein the spherical tank support wall 3 is arranged inside the spherical tank outer wall 1, the spherical tank support wall 3 is fixed in the spherical tank outer wall 1, and the inner tank 6 is arranged in the spherical tank support wall 3; Figure 4 The figure shows the structure diagram of the frame strip 82 and the reinforcing ring 83 in the embodiment of the application, wherein two reinforcing rings 83 are arranged at the middle and root of the frame strip 82 respectively, the upper end of the frame strip 82 is arc-shaped, the lower end is linear, and the diameter of the middle reinforcing ring 83 is larger than that of the root reinforcing ring 83.

[0035] In the implementation process, the liquid hydrogen is stored in the inner tank 6, the spherical tank outer wall 1 is stably arranged in the corresponding position through the fixing seat, a plurality of spherical tank support legs 51 are in contact with the placement surface, the support leg pull rod 52 is connected between every two spherical tank support legs 51, the support stability of the spherical tank support leg 51 is improved, and a U-shaped plate can also be arranged between the spherical tank support leg 51 and the spherical tank outer wall 1, so that the support stability of the spherical tank support leg 51 is further improved; the whole device is divided into three parts, i.e., the spherical tank outer wall 1, the spherical tank support wall 3 and the inner tank 6, and the two parts are vacuum areas, the double vacuum of the first vacuum area 2 and the second vacuum area 7 strengthens the leakage prevention and cooling effect of the liquid hydrogen spherical tank; the spherical tank support wall 3 is fixed in the inner part of the spherical tank outer wall 1 through the tank top hollow support column 43; a ring of lifting lugs 41 is arranged on the outer wall of the spherical tank support wall 3, the lifting lugs 41 are fixed with the upper end of the tank top hollow support column 43 through a pull rope 42, the pull rope 42 forms a cable-stayed line between the spherical tank outer wall 1 and the spherical tank support wall 3, and the stability of the spherical tank support wall 3 is enhanced; the tank top hollow support column 43 is arranged in a hollow manner, so as to reduce the heat conduction area.

[0036] The support strength of the frame strip 82 to the inner tank 6 is realized through the support end 81, the heat insulation pad plate is connected with the frame strip 82, on the one hand, the support area of the frame strip 82 and the spherical tank support wall 3 is expanded, and the pressure of the frame strip 82 and the inner tank 6 and the like structure to the spherical tank support wall 3 is reduced; on the other hand, the heat insulation effect of the heat insulation pad plate further improves the cold insulation effect of the liquid hydrogen in the inner tank 6; the reinforcing ring 83 is arranged between the plurality of frame strips 82, the reinforcing ring 83 can be integrally formed with the plurality of frame strips 82, and the frame strip 82 and the reinforcing ring 83 form a “basket” type as a whole; the reinforcing ring 83 plays a reinforcing role for the frame strip 82 on the one hand, and bears the mass of the inner tank 6 together with the frame strip 82, improves the weighing stability of the frame strip 82, and on the other hand, the reinforcing ring 83 has a certain longitudinal thickness, and the cold quantity conducted on the reinforcing ring 83 can play a certain cold insulation role for the inner tank 6;

[0037] The reinforcing ring 83 is located at the middle part and the root part of the frame strip 82 respectively, the reinforcing ring 83 can be made of 316L stainless steel material, so that the frame strip 82 forms a stable support structure, and the support effect of the frame strip 82 on the inner tank 6 is improved; the frame strip 82 adopts an arc-shaped rod type, compared with the traditional straight rod type inner tank support, the arc-shaped rod type has a longer heat transfer path and higher stability.

[0038] The application realizes the vacuum sealing storage of liquid hydrogen and greatly improves the heat insulation performance and structural strength of the spherical tank by being provided with a double eccentric vacuum heat insulation structure; the fixed limiting structure and the support frame structure are arranged in the double vacuum liquid hydrogen spherical tank, and the effects of preventing cold leakage and failure of the liquid hydrogen spherical tank in a cryogenic environment are realized, so that the storage capacity is ensured while the cold leakage amount is reduced.

[0039] In an embodiment of the application, the support end 81 includes a heat insulation wheel 811, a top end cover plate 812 and a hollow support pipe 813; one end of the hollow support pipe 813 is fixedly connected with the inner tank 6, the heat insulation wheel 811 surrounds the outside of the hollow support pipe 813, the top end cover plate 812 is fixed on the upper end of the heat insulation wheel 811, and the lower end of the heat insulation wheel 811 is fixedly connected with the frame strip 82.

[0040] In an embodiment of the application, the heat insulation wheel 811 is divided into three groups, and the number of each group is greater than or equal to six; and the heat insulation wheel 811 is arranged in a “concave” shape as a whole.

[0041] Reference Figure 2 and Figure 3 , Figure 2 The structure of the support end in the embodiment of the application is shown, the heat insulation wheel 811 is divided into three groups and semi-surrounds the hollow support pipe 813, and the heat insulation wheel 811 cooperates with the top end cover plate 812 to realize the full surrounding of the hollow support pipe 813; Figure 3A top view of the arrangement of the inner tank and the support ends in an embodiment of the present invention is shown. Taking the central axis of the inner tank 6 as a reference, six support ends 81 are selected to be arranged in a circumferential direction with an interval angle of 60°.

[0042] During implementation, the hollow branch pipe 813 is fixed on the side wall of the inner tank 6. The hollow structure of the hollow branch pipe 813 is also to reduce the heat conduction area; the three groups of insulating wheels 811 are used to clamp and fix the two sides and the bottom of the hollow branch pipe 813 in three directions. The lower ends of the three groups of hollow branch pipes 813 are fixedly connected to the upper ends of the frame bars 82, and the top cover plates 812 are fixed to the upper ends of the insulating wheel 811 groups on both sides to prevent the inner tank 6 from separating from the insulating wheel 811 groups arranged in an "concave" shape. The insulating wheel 811 group plays a role in clamping and fixing the hollow branch pipe 813 on the one hand, and on the other hand, it contacts the inner tank 6 to keep the inner tank 6 cold; the number of each group of insulating wheels 811 can be adjusted according to factors such as the volume of the inner tank 6 to ensure the stability of the inner tank 6. For example, ten insulating wheels 811 can be selected as a group;

[0043] And because the hollow branch pipe 813 is clamped between the insulating wheel 811, after the inner tank 6 shrinks due to cooling, the inner tank 6 can drive the hollow main pipe to move laterally along the insulating wheel 811 group, while ensuring the stability of the inner tank 6, avoiding the pulling force on the frame bar 82 caused by the forced contraction of the inner tank 6, causing fatigue of the frame bar 82.

[0044] In one embodiment of the present invention, the outer wall 1 of the spherical tank is made of high-strength carbon steel, and the support wall 3 of the spherical tank and the inner tank 6 are made of low-temperature resistant stainless steel.

[0045] The pull rope 42 is made of high-density carbon fiber composite material.

[0046] During the implementation process, the main function of the inner tank 6 is to realize the storage function of liquid hydrogen, so the part of the inner wall of the inner tank 6 that is in direct contact with the liquid hydrogen is made of low-temperature resistant stainless steel; the spherical tank support wall 3 is close to the inner tank 6 and is also in a low-temperature environment, so low-temperature resistant stainless steel also needs to be selected; and the spherical tank outer wall 1 is relatively far away from the inner tank 6, and because the spherical tank outer wall 1 needs to bear the mass of the spherical tank support wall 3 and the inner tank 6, the above-mentioned high-strength carbon steel has better strength.

[0047] In one embodiment of the present invention, the outer wall of the inner tank 6 is wound layer by layer with multiple layers of thermal insulation material, low thermal conductivity carbon fibers and hollow glass microspheres.

[0048] In one embodiment of the present invention, the winding layer of the outer wall of the inner tank 6 adopts a composite structure of multiple layers of insulation material, hollow glass beads, multiple layers of insulation material, and low thermal conductivity carbon fiber from the inside to the outside, and the gaps between the layers are vacuumed.

[0049] refer to Figure 5 ,Figure 5 The schematic diagram of the composite multi-layer structure outside the inner tank in the embodiment of the present application is shown, and the outer wall of the inner tank is wound with multi-layer heat insulation material, hollow glass microsphere and low thermal conductivity carbon fiber material.

[0050] In the implementation process, the inner wall of the inner tank 6 is made of stainless steel material which can resist ultra-low temperature; in order to improve the heat reflectivity of the inner tank 6, the surface of the inner tank 6 is polished and ground during processing; the composite structure of multi-layer heat insulation material, hollow glass microsphere, multi-layer heat insulation material and low thermal conductivity carbon fiber is wound outside the inner tank 6 in sequence, and the gap between each layer of structure is vacuumized, the multi-layer heat insulation material is arranged in a north-south hemisphere symmetry, which ensures that the heat radiation can be fully reflected, and the composite multi-layer heat insulation material can ensure the maximum reduction of internal cold leakage through radiation; the hollow glass microsphere has the characteristics of heat insulation, which improves the heat insulation performance of the inner tank 6, and prolongs the heat transfer path and reduces the heat transfer area through the characteristics of the hollow glass microsphere to prevent the internal liquid from leaking cold as much as possible; the main role of the hollow glass microsphere and the low thermal conductivity carbon fiber is that on the one hand, when the cold of the inner tank 6 is transmitted, the hollow glass microsphere can maximize the reduction of the cold leakage caused by conduction, and reflect the radiation cold leakage to a certain extent; on the other hand, once an accident occurs, the low thermal conductivity carbon fiber with high strength can prevent the secondary public risk caused by the explosion of the inner tank 6.

[0051] Although the present application is described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A double vacuum eccentric liquid hydrogen spherical tank, characterized by, The application relates to a spherical tank, which comprises a spherical tank outer wall (1), a first vacuum zone (2) and a spherical tank support wall (3), the spherical tank outer wall (1) is vertically eccentrically arranged with the spherical tank support wall (3), a fixed limiting structure (4) is arranged between the spherical tank outer wall (1) and the spherical tank support wall (3); the first vacuum zone (2) is located between the spherical tank outer wall (1) and the spherical tank support wall (3); a fixing frame (5) is arranged at the lower end of the spherical tank outer wall (1). The spherical tank support wall (3) is internally provided with an inner tank (6), the spherical tank outer wall (1) and the inner tank (6) are concentrically arranged, the spherical tank support wall (3) and the inner tank (6) form a second vacuum zone (7), the inner tank (6) is arranged on the spherical tank support wall (3) through a support frame structure (8), and the support frame structure (8) is used for strengthening the structural strength of the inner tank (6) and reducing the heat conduction area.

2. The double vacuum eccentric liquid hydrogen spherical tank according to claim 1, wherein The fixed limiting structure (4) comprises a lifting lug (41), a pull rope (42) and a tank top hollow support column (43), the upper end of the spherical tank support wall (3) in the first vacuum zone (2) is fixedly provided with the lifting lug (41), the upper end of the spherical tank outer wall (1) in the first vacuum zone (2) is fixedly provided with the tank top hollow support column (43), and the two ends of the pull rope (42) are connected with the tank top hollow support column (43) and the lifting lug (41) respectively.

3. A double vacuum eccentric liquid hydrogen spherical tank according to claim 2, wherein The support frame structure (8) comprises a support end (81), a frame strip (82), a reinforcing ring (83) and an insulating pad, a plurality of frame strips (82) are annularly arranged on the side of the inner tank (6), the support end (81) is used for connecting the inner tank (6) and one end of the frame strip (82), the side of the plurality of frame strips (82) is fixed through the reinforcing ring (83), the other end of the frame strip (82) is connected with the spherical tank support wall (3) through the insulating pad, and the cross section of the frame strip (82) is arc-shaped.

4. The double vacuum eccentric liquid hydrogen spherical tank according to claim 3, wherein The support end (81) comprises an insulating wheel (811), a top end cover plate (812) and a hollow branch pipe (813), one end of the hollow branch pipe (813) is fixedly connected with the inner tank (6), the insulating wheel (811) is arranged outside the hollow branch pipe (813), the top end cover plate (812) is fixedly arranged at the upper end of the insulating wheel (811), and the lower end of the insulating wheel (811) is fixedly connected with the frame strip (82).

5. A double vacuum eccentric liquid hydrogen spherical tank according to claim 4, wherein The insulating wheel (811) is divided into three groups, and the number of the insulating wheel (811) in each group is greater than or equal to six, and the insulating wheel (811) is arranged in a "concave" shape as a whole.

6. A double vacuum eccentric liquid hydrogen spherical tank according to claim 5, wherein Two reinforcing rings (83) are arranged at the middle and root of the frame strip (82) respectively.

7. A double vacuum eccentric liquid hydrogen spherical tank according to claim 6, wherein The spherical tank outer wall (1) is made of high-strength carbon steel material, the spherical tank support wall (3) and the inner tank (6) are made of low-temperature-resistant stainless steel material.

8. The double vacuum eccentric liquid hydrogen spherical tank according to claim 7, wherein The pull rope (42) is made of high-density carbon fiber composite material.

9. A double vacuum eccentric liquid hydrogen spherical tank according to claim 8, wherein The outer wall of the inner tank (6) is wound layer by layer by a plurality of layers of insulating materials, low-thermal-conductivity carbon fibers and hollow glass microbeads.

10. The double vacuum eccentric liquid hydrogen spherical tank according to claim 9, wherein The winding layers of the outer wall of the inner tank (6) are sequentially formed from the inside to the outside using a composite structure of multiple layers of thermal insulation material, hollow glass microspheres, multiple layers of thermal insulation material, and low thermal conductivity carbon fibers, and the gaps between the layers are vacuumed.

11. A double vacuum eccentric liquid hydrogen spherical tank according to any one of claims 1 to 9, wherein The fixing frame (5) comprises a plurality of spherical tank legs (51), and a leg pull rod (52) is connected between each pair of the spherical tank legs (51).

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