A cryogenic insulation container with an internal support structure and its installation method

Abstract

The present invention discloses a cryogenic insulation container with an internal support structure and an installation method thereof, which includes an outer container, an inner container and an internal support structure. The inner container is located inside the outer container, and the inner container and the outer container are connected through the internal support structure. The inner container is a double-layer structure and sequentially includes a metal inner lining layer and a fiber composite material layer from the inside to the outside; the internal support structure includes a fixed-end support assembly and a sliding-end support assembly, and the fixed-end support assembly and the sliding-end support assembly are arranged in pairs; a plurality of annular buckles are detachably connected to the outer surface of the inner container, and the annular buckles are sleeved on the outer surface of the fiber composite material layer of the inner container; one end of the fixed-end support assembly and the sliding-end support assembly is connected to the annular buckle, and the other end is connected to the outer container. The present invention solves the problems of stress concentration and material wear of the composite material layer caused by the internal support structure, thereby ensuring the safe operation of the cryogenic insulation container.

Description

Technical Field

[0001] The present invention relates to the technical field of cryogenic insulation containers, and particularly to a cryogenic insulation container with an internal support structure and an installation method thereof. Background Art

[0002] The applications of industrial cryogenic liquids, such as liquid nitrogen, liquid ammonia, liquid oxygen, etc., are becoming increasingly widespread, and the demand for containers for storing and transporting cryogenic liquid media in various industries such as aerospace, energy and chemical engineering, food and medicine is also increasing year by year. A cryogenic insulation container is a typical device for storing and transporting cryogenic liquid media, which is composed of components such as an outer container, an inner container, an insulation layer, and an internal support structure. However, there is a large temperature difference between the cryogenic liquid medium and the environment, which will inevitably cause heat to enter the inner container, resulting in the endothermic evaporation of the cryogenic liquid medium and thus an increase in the internal pressure, thereby triggering behaviors such as overpressure relief, which is not conducive to the storage and transportation of cryogenic liquid media. To solve this problem, the Lawrence Livermore National Laboratory in the United States proposed to replace the metal inner container with a lower working pressure in traditional cryogenic insulation containers with a fully wound inner container structure made of fiber composite materials with a certain pressure resistance capacity, so as to increase the relief pressure of the container, thereby increasing the non-destructive storage time of the container and achieving certain applications.

[0003] The internal support structure, as the main connector between the inner and outer containers, simultaneously undertakes the functions of load transfer, deformation coordination, and temperature distribution, and is a key component in the design and safety evaluation of cryogenic insulation containers. In traditional cryogenic insulation containers, there are many forms of internal support structures, such as tie-rod type, sling type, fiberglass support, steel pipe support, etc. For mobile cryogenic insulation containers, a two-point support or an eight-point support structure is mainly adopted. The two-point support structure installs a steel pipe support structure at both ends of the inner container head, which is generally used in small containers; with the large-scale use of cryogenic liquids, cryogenic insulation containers are developing towards a large-volume trend, and they often adopt an eight-point support structure, which includes front and rear lower struts and front and rear upper compression columns. At present, the research and improvement of the internal support structure mainly focus on traditional cryogenic insulation containers. For example, CN216813744U further improves on the basis of the two-point support structure and the eight-point support structure of traditional cryogenic insulation containers to form a ten-point support structure with axial and radial supports; in CN207527289U, considering the problem that the eight-point support structure cannot be closely attached to the inner container during use, resulting in uneven stress distribution of the inner container, a twelve-point support structure is proposed.

[0004] However, for cryogenic insulation containers with a fully wound inner liner structure made of fiber composite materials, due to the presence of the fiber composite material layer, it is impossible to weld a compensation structure on the outer surface of the inner container. The support structure will directly abut against the outer surface of the fiber composite material layer, which not only causes stress concentration in the composite material layer, but also causes certain wear to the composite material layer, and the safety performance of the container cannot be guaranteed. In summary, the inner support structure of traditional cryogenic insulation containers is not suitable for cryogenic insulation containers made of composite materials. There is no discovery in the existing technology that the inner support structure of cryogenic insulation containers with a fully wound inner liner structure made of fiber composite materials has the above problems, nor is there any disclosure on how to solve this problem. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems in related technologies to a certain extent. For this purpose, the present invention provides a cryogenic insulation container with an inner support structure and its installation method, which can solve the problems of stress concentration and material wear in the composite material layer, and thus ensure the safe operation of the cryogenic insulation container.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A cryogenic insulation container with an inner support structure includes an outer container, an inner container, and an inner support structure. The inner container is located inside the outer container, and the inner container and the outer container are connected by the inner support structure. The inner container is a double-layer structure and sequentially includes a metal inner liner layer and a fiber composite material layer from the inside to the outside; the inner support structure includes a fixed-end support assembly and a sliding-end support assembly, and the fixed-end support assembly and the sliding-end support assembly are arranged in pairs; a plurality of annular buckles are detachably connected to the outer surface of the inner container, and the annular buckles are sleeved on the outer surface of the fiber composite material layer of the inner container; one end of the fixed-end support assembly and the sliding-end support assembly is connected to the annular buckle, and the other end is connected to the outer container.

[0008] The fiber composite layer of the inner container is generally wound and formed on the outer surface of the metal inner liner by dry winding or wet winding of the fiber composite material. The fiber composite material generally includes carbon fiber, glass fiber or basalt fiber. When installing the inner support structure between the inner container and the outer container, due to the existence of the fiber composite layer on the inner container, the outer surface cannot be welded with the compensation structure. Therefore, by setting the annular buckle and connecting the inner support structure with the annular buckle, the direct contact between the inner support structure and the fiber composite layer of the inner container is avoided. On the one hand, the contact area with the inner container is increased to provide a good support effect, and at the same time, the stress concentration phenomenon is reduced, and the wear of the material is reduced. On the other hand, even when the strength of the annular buckle is damaged, it will not immediately affect the normal operation of the inner container; at the same time, by setting a sliding end support assembly at one end in the axial direction, when the inner container deforms under the action of the huge temperature difference formed by the low-temperature liquid medium inside it, the sliding end support assembly can automatically slide relative to the inner container to prevent stress concentration caused by deformation and ensure the safe operation of the cryogenic insulation container.

[0009] Optionally, an elastic material layer is further provided between the annular buckle and the outer surface of the inner container to achieve buffering, reduce stress and reduce the wear of the fiber composite layer.

[0010] Optionally, both the fixed end support assembly and the sliding end support assembly include a backing plate, a support column and a support cap. The backing plate is fixed on the outer peripheral surface of the annular buckle, the support cap is fixedly connected with the outer container, and one end of the support column is connected to the backing plate and the other end is connected to the support cap. By connecting and fixing the backing plate with the annular buckle, the contact area between the support assembly and the inner container can be significantly increased, forming a good support effect and reducing the stress concentration and material wear phenomenon.

[0011] Optionally, the fixed end support assembly further includes a fixed ring seat. The fixed ring seat is located at the end where the support column is connected to the backing plate to fix the support column. Through the fixed ring seat, the fixed connection between the fixed end support assembly and the inner container is finally realized, that is, the fixed end support assembly cannot generate displacement relative to the inner container, while the support column and the backing plate of the sliding end support assembly are not fixed, and the support is realized through abutment, so as to provide a certain slip compensation space when the inner container deforms.

[0012] Optionally, each annular buckle includes two semi-circular rings. After the two semi-circular rings are sleeved on the outer surface of the fiber composite layer of the inner container, they are fixedly connected by bolts, and the two semi-circular rings surround and clamp the outer surface of the fiber composite layer.

[0013] Optionally, the width of the annular buckle is not less than the diameter of the support column to ensure the contact area and prevent stress concentration.

[0014] Optionally, the thickness of the elastic material layer is not less than that of the annular buckle, and its width is not less than that of the annular buckle, so as to form a buffer between the annular buckle and the fiber composite material layer, reducing the wear on the fiber composite material layer and the stress concentration phenomenon of the inner container.

[0015] Optionally, the support cap includes a connecting cap and an outer edge section. The connecting cap penetrates through the outer container and extends out, and the outer edge section is fixedly connected to the inner wall surface of the outer container, for example, the outer edge section and the inner wall surface are fixedly connected by means of welding.

[0016] Optionally, the material of the support column is fiberglass, and the thermal conductivity coefficient of the material of the support column does not exceed 0.5W·m -1 ·K -1 , reducing the heat transfer between the inner container and the outer container.

[0017] Optionally, the number of the fixed-end support assemblies and the mobile-end assemblies is 4 groups respectively, the number of the annular buckles is two, the fixed-end support assemblies are symmetrically distributed along the circumferential direction of one of the annular buckles, and the sliding-end support assemblies are symmetrically distributed along the circumferential direction of the other annular buckle. The symmetry here includes being symmetrically distributed both horizontally and vertically in its circumferential cross-section.

[0018] In addition, the present invention also provides an installation method for a cryogenic insulation container with an inner support structure. The cryogenic insulation container includes the cryogenic insulation container with an inner support structure described in any one of the foregoing items, and specifically includes: making rubber into a long strip and installing it on the outer surface of the fiber composite material layer of the inner container at a position at a certain distance from the weld between the head and the cylindrical section of the inner container, and fixing it with tape; welding a backing plate on the outer peripheral surface of the annular buckle, and making the normal direction of the backing plate form an angle of 36° with the vertical direction, and welding a fixed ring seat on the backing plate of the fixed-end support assembly; welding the support cap on the inner surface of the outer container, and making the axis direction of the support cap form an angle of 36° with the vertical direction; after welding, performing ultrasonic flaw detection on all welds to ensure that there are no defects inside the welds; fixedly sleeving the annular buckle on the rubber and making it in close contact with the rubber to ensure that the annular buckle does not slide relative to the inner container, and installing the support column between the backing plate and the support cap to ensure that the fixed support assembly / sliding support assembly is symmetrically distributed along the circumferential direction.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) By setting the support columns of the fixed-end support assembly / sliding-end support assembly to support on the annular buckle, the contact area with the inner container is increased, and a good support effect can be achieved;

[0021] (2) Compared with the traditional internal support structure of cryogenic insulation containers, the internal support structure supported by annular buckles can reduce the stress concentration phenomenon in the inner container. The position of the maximum stress is transferred from the inner container to the annular buckle, increasing the safety performance during the use of the container. Even when the annular buckle undergoes strength failure, the inner container still has a large safety margin.

[0022] (3) It overcomes the wear problem of the traditional internal support structure of cryogenic insulation containers on the fiber composite material layer, directly avoids the wear of the support column on the fiber composite material layer, and effectively reduces the shear fatigue phenomenon of the composite material layer of the inner container generated during the transportation of the container, thereby greatly improving the service life and safety performance of the container.

[0023] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and the accompanying drawings. The best embodiments or means of the present invention will be elaborately presented in combination with the accompanying drawings, but it is not a limitation to the technical solution of the present invention. In addition, these features, elements, and components that appear in each of the following texts and drawings are multiple, and different symbols or numbers are marked for convenience of representation, but they all represent components with the same or similar structures or functions. Brief Description of the Drawings

[0024] The present invention will be further described below in conjunction with the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the internal support structure of the cryogenic insulation container of the present invention;

[0026] Figure 2 It is a cross-sectional view of the cryogenic insulation container of the present invention;

[0027] Figure 3 It is a cross-sectional view at the fixed-end support assembly of the present invention;

[0028] Figure 4 It is a cross-sectional view at the sliding-end support assembly of the present invention;

[0029] Figure 5 It is Figure 2 a partial enlarged view of point A in

[0030] Figure 6 It is Figure 2 a partial enlarged view of point B in

[0031] Among them, the outer container 101, the inner container 102, the fixed-end support assembly 103, the sliding-end support assembly 104, the annular buckle 105, the elastic material layer 106;

[0032] The metal inner lining layer 201, the fiber composite material layer 202;

[0033] The backing plate 301, the fixed ring seat 302, the support column 303, and the support cap 304. Detailed implementation mode

[0034] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. Based on the embodiments in the implementation mode, it is intended to explain the present invention and should not be construed as a limitation of the present invention.

[0035] As used herein, the phrase "in one embodiment" or "example" or "instance" means that a particular feature, structure, or characteristic described in connection with the embodiment itself can be included in at least one embodiment of the present patent disclosure. The appearances of the phrase "in one embodiment" in various places in the specification do not necessarily refer to the same embodiment.

[0036] The cryogenic insulation container in this embodiment has an eight-point support structure, including an outer container 101, an inner container 102, and an inner support structure. The inner container 102 is installed inside the outer container 101, and the inner container 102 and the outer container 101 are connected by the inner support structure. Among them, the inner container 102 includes a middle cylindrical body section and end heads at both ends. The inner container 102 is a double-layer structure and sequentially includes a metal inner lining layer 201 and a fiber composite material layer 202 from the inside to the outside. Two annular buckles 105 are detachably connected to the outer surface of the inner container 102, and the two annular buckles 105 are respectively located at positions on the outer surface of the cylindrical body section of the inner container at a certain distance from the welds between the end heads and the cylindrical body section.

[0037] Specifically, the inner support structure includes 4 sets of fixed-end support components 103 and 4 sets of sliding-end support components 104. Among them, the 4 sets of fixed-end support components 103 are all connected to one of the annular buckles 105, and their installation positions are symmetrically distributed in the circumferential direction. Specifically, they are symmetrically arranged left and right, and up and down; while the 4 sets of sliding-end support components 104 are all connected to the other annular buckle 105 and are arranged in the same way as the fixed-end support components 103.

[0038] Each set of fixed-end support components 103 includes a backing plate 301, a fixed ring seat 302, a support column 303, and a support cap 304. The backing plate 301 is fixedly connected to the annular buckle 105. One end of the support column 303 is connected to the backing plate 301, and the other end is connected to the support cap 304 to connect to the outer container 101. The fixed ring seat 302 is installed on the backing plate, that is, located at the end where the support column 303 is connected to the backing plate 301 to fix the support column 303, and finally the support column 303 forms a support between the outer container 101 and the inner container 102.

[0039] Each sliding-end support component 104 is similar to the fixed-end support component, including a backing plate 301, a support column 303, and a support cap 304. One end of the support column 303 abuts against the backing plate 301, and they are not fixed to each other and can slide. The other end of the support column 303 is connected to the support cap 304 to connect to the outer container 101.

[0040] The support columns 303 in both the fixed-end support component 103 and the sliding-end support component 104 are made of fiberglass material, and other materials with a thermal conductivity not exceeding 0.5W·m -1 ·K -1 can also be used.

[0041] The support cap 304 includes a connecting cap and an outer edge section. The connecting cap penetrates through the outer container 101 and protrudes, and the outer edge section is fixed to the inner wall surface of the outer container 101 by welding.

[0042] Each annular buckle 105 includes two semi-circular rings. After the two semi-circular rings are sleeved on the outer surface of the fiber composite material layer 202 of the inner container 102, they are fixedly connected by bolts. An elastic material layer 106 is provided between the annular buckle 105 and the outer surface of the fiber composite material layer 202 of the inner container 102. The elastic material can be selected as rubber, its thickness is not less than the thickness of the annular buckle 105, and its width is also not less than the width of the annular buckle 105. And the width of the annular buckle 105 is not less than the diameter of the support column 303.

[0043] The following is the specific application of the cryogenic insulation container in this embodiment in the vehicle-mounted liquid hydrogen storage tank during the hydrogen transportation link.

[0044] According to the "TSG R0005-2011 Safety Technical Supervision Regulations for Mobile Pressure Vessels", for the typical structure and service conditions of a 2.5m 3 liquid hydrogen container with a 90% filling rate and a horizontal acceleration of 2g, when using the traditional eight-point support structure of the liquid hydrogen insulation container and the internal support structure proposed in this embodiment respectively, the shear stress distribution of the fiber composite material layer of the inner container is shown.

[0045] The design parameters of the cryogenic insulation container are as follows: The metal inner lining layer is made of 316L stainless steel material, and the fiber composite material layer is made of T700 carbon fiber composite material. The volume of the inner container is 2.5m 3 , the length of the cylindrical section is 2.80m, the inner diameter of the stainless steel metal inner lining layer is 1.00m, the wall thickness is 2mm, and the thickness of the T700 carbon fiber composite material layer is 9mm. The outer container is made of 316L stainless steel material, the length of the cylindrical section is 2.95m, the inner diameter is 1.15m, and the wall thickness is 6mm. When the liquid hydrogen filling rate in the container is 90%, the total weight of the inner container and the medium is 448.80kg.

[0046] In the traditional eight-point support structure, the main load-bearing component, the support column, is made of epoxy fiberglass pipe with a size of Φ110 / Φ65 and a length of 74 mm. The angle between the axis of the support column and the vertical direction is 36°, and the horizontal distance from the center line of the support column to the weld between the head and the cylinder section is 400 mm.

[0047] In the internal support structure of the cryogenic insulation container proposed in this embodiment, the annular buckle is made of 316L stainless steel, 150 mm wide and 3 mm thick. The elastic material layer is made of ethylene propylene diene monomer (EPDM) rubber, 150 mm wide and 7 mm thick. The backing plate is a square 316L stainless steel plate, 2 mm thick and 130 mm on each side. The fixed ring seat is made of 316L stainless steel with a size of Φ120 / Φ110 and a width of 10 mm. The support column is made of epoxy fiberglass pipe with a size of Φ110 / Φ65 and a length of 62 mm. The installation position of the support column is the same as that of the eight-point support structure.

[0048] In this embodiment, the installation steps of the internal support structure are as follows:

[0049] (1) According to the general rubber preparation process flow, the ethylene propylene diene monomer (EPDM) rubber is made into a strip with a length of 3 m, a width of 150 mm, and a thickness of 7 mm, and it is placed on the outer surface of the carbon fiber composite material layer as the elastic material layer. The distance from its center line to the weld between the head and the cylinder section of the inner container is 400 mm, and it is fixed with tape.

[0050] (2) Weld the backing plate on the outer peripheral surface of the annular buckle, requiring the angle between the normal direction of the backing plate and the vertical direction to be 36°. Then weld the fixed ring seat on the backing plate. Weld the support cap on the inner surface of the outer container, requiring the angle between the axis direction of the support cap and the vertical direction to be 36°. After welding, perform ultrasonic flaw detection on all welds to ensure that the welds are fully penetrated and there are no internal defects such as pores and inclusions.

[0051] (3) Place the two semi-circular rings on the elastic material layer made of ethylene propylene diene monomer (EPDM) rubber, install them symmetrically up and down to form an annular buckle, make it in close contact with the rubber, and lock and fix it with bolts to ensure that the annular buckle does not slide relative to the inner container.

[0052] (4) Install the support column between the backing plate and the support cap, ensuring that both the fixed support assembly and the sliding support assembly are symmetrically distributed along the circumferential direction.

[0053] The mechanical property parameters of each structural material in the cryogenic insulation container are shown in the following table:

[0054] Performance parameters Elastic modulus Poisson's ratio Density 316L stainless steel 200.0 GPa 0.32 <![CDATA[7.98g / cm 3 > Carbon fiber composite 234.5 GPa 0.28 <![CDATA[1.8g / cm 3 > Ethylene propylene diene monomer rubber 7.8 MPa 0.47 <![CDATA[0.0013g / cm 3 > Epoxy fiberglass 36.0 GPa 0.12 <![CDATA[2.0g / cm 3 >

[0055] For a traditional cryogenic adiabatic container with an eight-point support structure, the maximum shear stress value of the fiber composite material layer in the cylindrical section of the inner container is 5.3 MPa, which appears near the two lower sliding support assemblies; the maximum principal stress is 3.5 MPa, which appears at the two upper sliding support assemblies; when the acceleration is reversed, the maximum shear stress value of the fiber composite material layer in the cylindrical section of the inner container is also 5.3 MPa, but the direction is opposite; therefore, during the acceleration and deceleration of the vehicle, the composite material layer will undergo shear fatigue with a stress amplitude of 5.3 MPa.

[0056] For the cryogenic adiabatic container with the eight-point internal support structure in this embodiment, the maximum shear stress of the fiber composite material layer in the cylindrical section of the inner container also occurs at the two lower sliding support assemblies, and the value of the maximum shear stress is 3.5 MPa. The maximum principal stress also occurs at the two upper sliding support assemblies, and the value of the maximum principal stress is 2.5 MPa; similarly, when a reverse horizontal acceleration is applied, the maximum shear stress value of the fiber composite material layer in the cylindrical section of the inner container is also 3.5 MPa, and the direction is opposite; at this time, the fiber composite material layer will undergo shear fatigue with a stress amplitude of 3.5 MPa.

[0057] Compared with the eight-point support structure of the traditional cryogenic adiabatic container, the internal support structure of the cryogenic adiabatic container proposed in this embodiment reduces the shear stress and the fatigue stress amplitude by 34%, and the maximum principal stress value is reduced by 28%. This not only improves the strength safety margin of the inner container, but also reduces the fatigue stress amplitude of the limiting composite material layer of the inner container, improves the service life of the shear fatigue of the composite material layer, effectively protects the fiber composite material layer, and ensures the safety of the cryogenic adiabatic container during use.

[0058] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A cryogenic adiabatic container with an internal support structure, comprising an outer container, an inner container and an internal support structure. The inner container is located inside the outer container, and the inner container and the outer container are connected by the internal support structure. It is characterized in that: The inner container is of a double-layer structure and sequentially includes a metal inner lining layer and a fiber composite material layer from inside to outside; The internal support structure includes a fixed-end support assembly and a sliding-end support assembly, and the fixed-end support assembly and the sliding-end support assembly are arranged in pairs; A plurality of annular buckles are detachably connected to the outer surface of the inner container, and the annular buckles are sleeved on the outer surface of the fiber composite material layer of the inner container; the inner container includes a middle cylindrical body section and end heads at both ends, and the annular buckles are located on the cylindrical body section of the inner container; One end of the fixed-end support assembly and the sliding-end support assembly is connected to the annular buckle, and the other end is connected to the outer container.

2. The cryogenic adiabatic container with an internal support structure according to claim 1, characterized in that: An elastic material layer is further provided between the annular buckle and the outer surface of the inner container.

3. The cryogenic insulation container with an internal support structure according to claim 2, wherein: Both the fixed-end support assembly and the sliding-end support assembly include a backing plate, a support column and a support cap. The backing plate is fixed to the outer peripheral surface of the annular buckle, the support cap is fixedly connected to the outer container, and one end of the support column is connected to the backing plate and the other end is connected to the support cap.

4. The cryogenic adiabatic container with an internal support structure according to claim 3, wherein: The fixed-end support assembly further includes a fixed ring seat, and the fixed ring seat is located at the end where the support column is connected to the backing plate to fix the support column.

5. The cryogenic adiabatic container with an internal support structure according to claim 4, characterized in that: Each annular buckle includes two semi-circular rings, and after the two semi-circular rings are sleeved on the outer surface of the fiber composite material layer of the inner container, they are fixedly connected by bolts.

6. The cryogenic adiabatic container with an internal support structure according to claim 4, wherein: The width of the annular buckle is not less than the diameter of the support column.

7. The cryogenic adiabatic container with an internal support structure according to claim 3, characterized in that: The thickness of the elastic material layer is not less than the thickness of the annular buckle, and its width is not less than the width of the annular buckle.

8. The cryogenic adiabatic container with an internal support structure according to claim 3, characterized in that: The support cap includes a connecting cap and an outer edge section. The connecting cap penetrates through the outer container and extends out, and the outer edge section is fixedly connected to the inner wall surface of the outer container.

9. The cryogenic insulation container with an internal support structure according to claim 8, wherein: The material of the support column is fiberglass, and the thermal conductivity of the material of the support column does not exceed 0.5W·m -1 ·K -1 .

10. The cryogenic adiabatic container with an internal support structure according to claim 9, characterized in that: The numbers of the fixed-end support assembly and the sliding-end support assembly are 4 groups respectively, the number of the annular buckles is two, the fixed-end support assembly is symmetrically distributed along the circumferential direction of one annular buckle, and the sliding-end support assembly is symmetrically distributed along the circumferential direction of the other annular buckle.

11. A method for installing a cryogenic adiabatic container with an internal support structure as described in any one of claims 3-10, characterized in that, Including: Manufacture the elastic material layer into a strip shape, and install it at a certain distance from the weld position between the head and the cylindrical body section of the inner container on the outer surface of the fiber composite material layer of the inner container, and fix it with tape; Weld the backing plate on the outer peripheral surface of the annular buckle, and make the normal direction of the backing plate form an angle of 36° with the vertical direction, and weld the fixed ring seat on the backing plate of the fixed-end support assembly; Weld the support cap on the inner surface of the outer container, and make the axis direction of the support cap form an angle of 36° with the vertical direction; After welding, perform ultrasonic flaw detection on all welds to ensure that there are no defects inside the welds; Fix the annular buckle on the elastic material layer and make it in close contact with the elastic material layer to ensure that the annular buckle does not slide relative to the inner container; Install the support column between the backing plate and the support cap to ensure that the fixed support assembly / sliding support assembly is symmetrically distributed along the circumferential direction.

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