Double-layer low-temperature spherical tank

Abstract

The utility model provides a double-layer low-temperature spherical tank. The double-layer low-temperature spherical tank comprises an outer tank, an inner tank and a plurality of supporting assemblies, wherein a closed containing space is formed in the outer tank, the inner tank is used for storing a low-temperature medium, the inner tank is contained in the containing space, the supporting assemblies extend in the vertical direction, and the multiple supporting assemblies are all supported between the outer tank and the inner tank, so that a gap is formed between the outer wall of the inner tank and the inner wall of the outer tank. Meanwhile, the supporting assembly comprises an upper supporting column, a lower supporting column and a heat insulation part, the upper supporting column and the lower supporting column are connected to the inner tank and the outer tank respectively and connected together through the heat insulation part, and therefore heat conduction between the upper supporting column and the lower supporting column is blocked, and the heat insulation performance between the outer tank and the inner tank is guaranteed; and the heat preservation capability and the heat preservation stability of the double-layer low-temperature spherical tank on low-temperature media are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of spherical tanks, particularly to a double-layer low-temperature spherical tank. BACKGROUND

[0002] A spherical tank is a large-capacity, pressure-bearing spherical storage container, which is widely used in process industries such as petroleum, chemical industry, metallurgy, etc. The spherical tank is composed of a spherical shell and a support column. The spherical shell is assembled and welded by multiple steel plates. The support column is used to support the spherical shell and ensure its stability. The spherical tank has the advantages of uniform stress, strong load-bearing capacity, and material saving, but the manufacturing technology is high and the manufacturing cost is relatively high.

[0003] The spherical tank can be used to store low-temperature media, such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, and other low-temperature liquid substances. However, in the storage process of low-temperature media, in order to maintain the stability of the temperature of the medium, the spherical tank usually needs to have heat preservation capability to ensure the safe preservation of the low-temperature medium.

[0004] However, in the conventional low-temperature storage equipment, the support structure of the inner spherical tank is directly connected to the outside of the outer spherical tank and supported on the external support surface, which results in the problems of poor thermal insulation performance, poor heat preservation stability, and the like of the spherical tank, thereby affecting the use of the spherical tank. SUMMARY

[0005] The purpose of the utility model is to provide a double-layer low-temperature spherical tank, which improves the heat preservation performance of the spherical tank for low-temperature media.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] According to one aspect of the utility model, the utility model provides a double-layer low-temperature spherical tank for storing low-temperature media. The double-layer low-temperature spherical tank comprises an outer tank with a sealed containing space inside, an inner tank with a storage cavity inside for storing low-temperature media, a support assembly extending vertically and supported between the inner wall of the outer tank and the outer wall of the inner tank to allow the inner tank and the outer tank to be spaced apart, and a plurality of support assemblies arranged symmetrically along a vertical axis. The support assembly comprises an upper support column, a lower support column, and a thermal insulation piece. The upper support column is connected to the inner tank, the lower support column is connected to the outer tank, and the upper support column is connected to the lower support column through the thermal insulation piece to block the heat conduction between the upper support column and the lower support column.

[0008] In one embodiment of the present application, the bottom of the upper support column is provided with an upper pressing plate which protrudes outward from the outer wall of the upper support column and forms an upper connecting portion; the top of the lower support column is provided with a lower pressing plate which protrudes outward from the outer wall of the lower support column and forms a lower connecting portion; the upper pressing plate and the lower pressing plate are respectively attached to the upper and lower sides of the heat insulation member; and the upper connecting portion and the lower connecting portion are used to mount a connecting member so that the upper pressing plate and the lower pressing plate are fastened to the upper and lower sides of the heat insulation member through the connecting member.

[0009] In one embodiment of the present application, the upper connecting portion and the lower connecting portion are both provided with connecting holes; a through hole is formed in the heat insulation member; the through hole is arranged corresponding to the connecting holes and is used to pass the connecting member so that the upper pressing plate and the lower pressing plate are fastened to the upper and lower sides of the heat insulation member through the connecting member.

[0010] In one embodiment of the present application, the heat insulation member is provided as a glass steel plate to be connected between the upper support column and the lower support column.

[0011] In one embodiment of the present application, the support assembly further comprises a heat insulation gasket; the heat insulation gasket is sleeved in the connecting hole and is isolated between the upper pressing plate or the lower pressing plate and the connecting member.

[0012] In one embodiment of the present application, the outer tank comprises a bottom plate and a shell provided on the bottom plate; the shell is connected to the bottom plate and forms the accommodation space; the top of the bottom plate extends in the horizontal direction to form a support surface, and the lower support column is fixed to the support surface of the bottom plate.

[0013] In one embodiment of the present application, the shell is provided with a hemispherical portion and a cylindrical portion; the hemispherical portion is provided as a hemispherical shell, and the cylindrical portion is provided as a cylindrical shell; the bottom edge of the hemispherical portion is welded to the top edge of the cylindrical portion so that the cylindrical portion can support the hemispherical portion; and the bottom edge of the cylindrical portion is welded to the bottom plate so that the hemispherical portion, the cylindrical portion and the bottom plate enclose to form the accommodation space.

[0014] In one embodiment of the present application, the inner tank is provided as a spherical tank body; the inner tank is connected to the top of the bottom plate through the support assembly, and the inner tank and the hemispherical portion are arranged at the same spherical center, and the outer wall of the inner tank is arranged in a spaced manner with the inner wall of the hemispherical portion.

[0015] In an embodiment of the present application, the double-layer low-temperature spherical tank further comprises a pull rod assembly; the pull rod assembly is arranged obliquely and connected between two adjacent lower support columns to limit the two adjacent lower support columns together; the pull rod assembly comprises a first pull rod and a second pull rod; the first pull rod and the second pull rod are respectively connected to the two adjacent lower support columns, and an end of the first pull rod away from the lower support column is connected to the second pull rod; the second pull rod is movable relative to the first pull rod to adjust the overall length of the first pull rod and the second pull rod.

[0016] In an embodiment of the present application, the double-layer low-temperature spherical tank further comprises a filling member for heat insulation; the filling member is filled between the inner wall of the outer tank and the outer wall of the inner tank to insulate the inner tank.

[0017] From the above technical solution, the present application has at least the following advantages and positive effects:

[0018] In the present application, the double-layer low-temperature spherical tank comprises an outer tank, an inner tank and a plurality of support assemblies. The outer tank is internally provided with a sealed accommodation space, the inner tank is used for storing low-temperature medium, and the inner tank is accommodated in the accommodation space. The support assemblies extend along the vertical direction, and the plurality of support assemblies are all supported between the outer tank and the inner tank to form a space between the outer wall of the inner tank and the inner wall of the outer tank. Meanwhile, the support assemblies comprise upper support columns, lower support columns and heat insulation members. The upper support columns and the lower support columns are respectively connected to the inner tank and the outer tank and connected together through the heat insulation members, thereby blocking the heat conduction between the upper support columns and the lower support columns, and further ensuring the heat insulation performance between the outer tank and the inner tank and the heat preservation capacity and stability of the double-layer low-temperature spherical tank for the low-temperature medium. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the double-layer low-temperature spherical tank of the present application.

[0020] Figure 2 is Figure 1 a schematic view of the support assembly of the double-layer low-temperature spherical tank.

[0021] The reference signs are explained as follows:

[0022] 10 - outer tank; 11 - accommodation space; 12 - bottom plate; 13 - shell; 20 - inner tank; 30 - support assembly; 31 - upper support column; 32 - lower support column; 33 - thermal insulation piece; 34 - connecting piece; 35 - thermal insulation washer; 40 - pull rod assembly; 41 - first pull rod; 42 - second pull rod; 50 - filling piece; 131 - semispherical part; 132 - cylindrical part; 311 - upper pressing plate; 312 - upper connecting part; 313 - connecting hole; 321 - lower pressing plate; 322 - lower connecting part; 331 - through hole; 351 - abutting boss; 352 - clamping column. DETAILED DESCRIPTION

[0023] The typical embodiments embodying the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various changes in different embodiments, which do not deviate from the scope of the present application, and the description and drawings in essence are used for description, not for limiting the present application.

[0024] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indication of direction or position relationship (such as up, down, left, right, front and back, etc.) is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation. When these elements are in the position shown in the drawings, these descriptions are appropriate. If the position of these elements changes, the indication of these directions also changes accordingly.

[0025] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0026] The spherical tank can be used to store low-temperature medium, such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen and other low-temperature liquid substances. However, in the storage process of low-temperature medium, in order to keep the temperature of the medium stable, the spherical tank usually needs to have heat preservation capacity to ensure that the low-temperature medium can be safely stored. However, in the conventional low-temperature storage equipment, the support structure of the inner spherical tank is directly connected to the outside of the outer spherical tank and supported on the support surface outside, thereby causing the spherical tank to have problems such as poor heat insulation performance, poor heat preservation stability, and the like, which in turn affects the use of the spherical tank. Therefore, a double-layer low-temperature spherical tank is proposed to solve the above problems.

[0027] The scheme is further illustrated by the following embodiments:

[0028] Figure 1It is a schematic view of the double-layer low-temperature spherical tank of the embodiment of the utility model. Figure 2 It is Figure 1 It is a schematic view of the support assembly of the double-layer low-temperature spherical tank.

[0029] Please refer to Figure 1 The double-layer low-temperature spherical tank of the embodiment is used for storing low-temperature medium to ensure that the low-temperature medium can be stored for a long time in a low-temperature environment. The low-temperature medium can be set as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen or other low-temperature medium.

[0030] Specifically, the double-layer low-temperature spherical tank can include an outer tank 10, an inner tank 20 and a support assembly 30.

[0031] The inner tank 20 can be accommodated in the accommodating space 11. Meanwhile, the inner tank 20 can be provided with a storage cavity inside for storing low-temperature medium. The support assembly 30 can extend vertically and be supported between the inner wall of the outer tank 10 and the outer wall of the inner tank 20, so that the inner tank 20 and the outer tank 10 are spaced apart, thereby reducing the heat exchange efficiency between the outer tank 10 and the inner tank 20, and further forming heat preservation for the inner tank 20.

[0032] Referring to Figure 1 The outer tank 10 can include a bottom plate 12 and an outer shell 13, and the outer shell 13 can be arranged on the bottom plate 12.

[0033] Specifically, the outer shell 13 can be sealingly connected to the bottom plate 12, and the inner part of the outer tank 10 forms a sealed accommodating space 11. That is, the bottom edge of the outer shell 13 can be connected to the bottom plate 12, and the outer shell 13 is located above the bottom plate 12 and forms a sealed accommodating space 11, so that the outer tank 10 can further isolate the inner tank 20 from the external environment and ensure the heat insulation effect of the inner tank 20 on the low-temperature medium.

[0034] In the embodiment, the outer shell 13 can be provided with a hemispherical part 131 and a cylindrical part 132.

[0035] The hemispherical part 131 can be provided as a hemispherical shell, and the cylindrical part 132 can be provided as a cylindrical shell. The bottom edge of the hemispherical part 131 can be welded to the top edge of the cylindrical part 132, so that the cylindrical part 132 can support the hemispherical part 131, and the hemispherical part 131 and the cylindrical part 132 are sealingly connected. Meanwhile, the bottom edge of the cylindrical part 132 is welded to the bottom plate 12, so that the hemispherical part 131, the cylindrical part 132 and the bottom plate 12 are enclosed to form the accommodating space 11.

[0036] In some other embodiments, the outer shell 13 can be provided in a semi-spherical shape, a cylindrical shape or a rectangular shape, so that the outer shell 13 and the bottom plate 12 are connected to form the accommodating space 11, and the inner tank 20 can be accommodated in the accommodating space 11.

[0037] In the embodiment, the top of the bottom plate 12 can extend in a horizontal direction to form a support surface, and the bottom of the support assembly 30 is fixed on the support surface of the bottom plate 12, so that the support assembly 30 can be stably supported on the bottom plate 12.

[0038] It should be noted that the materials of the outer shell 13 and the bottom plate 12 can be provided as steel materials, and the outer shell 13 can be welded on the bottom plate 12, so that the outer tank 10 can form the sealed accommodating space 11.

[0039] Referring to Figure 1 , the inner tank 20 can be provided as a spherical tank body.

[0040] Specifically, the inner tank 20 is connected to the top of the bottom plate 12 through the support assembly 30, and the inner tank 20 is provided with the same center as the semi-spherical part 131, so that the outer wall of the inner tank 20 is spaced apart from the inner wall of the semi-spherical part 131.

[0041] It should be noted that the inner tank 20 can also be provided as a cylindrical shape or a rectangular shape, etc. for storing low-temperature medium. Since the stored medium has a pressure, it will form a pressure on the inner tank 20, therefore, the inner tank 20 is preferably provided as a spherical shape to increase the pressure resistance of the inner tank 20 and optimize the internal space, thereby increasing the volume of the inner tank 20.

[0042] In addition, the inner tank 20 can be made of low-temperature resistant steel or alloy material, so that the inner tank 20 can be used in a low-temperature environment and maintain the stability and strength of the structure in a low-temperature environment.

[0043] Referring to Figure 1 and Figure 2 , the support assembly 30 can be provided in a plurality, and the plurality of support assemblies 30 are arranged in an axial symmetry along a vertical axis, such as an axial symmetry along the vertical axis of the inner tank 20, for supporting the inner tank 20.

[0044] In the embodiment, the plurality of support assemblies 30 are arranged in an axial symmetry along the central axis of the cylindrical part 132, so that the plurality of support assemblies 30 can support the inner tank 20.

[0045] Of course, in some other embodiments, the plurality of support assemblies 30 can also be arranged in a horizontal direction to support the inner tank 20.

[0046] The support assembly 30 includes an upper support column 31, a lower support column 32 and a heat insulating member 33.

[0047] The upper support column 31 is connected to the inner tank 20, the lower support column 32 is connected to the outer tank 10, and the upper support column 31 is connected to the lower support column 32 through the heat insulation piece 33. That is, the upper end of the upper support column 31 is connected to the outer wall of the inner tank 20, the lower end of the upper support column 31 is connected to the heat insulation piece 33, the upper end of the lower support column 32 is connected to the heat insulation piece 33, and the lower end is connected to the inner wall of the outer tank 10, that is, the lower end of the lower support column 32 is fixed to the support surface of the bottom plate 12, so that the support assembly 30 can be supported between the outer tank 10 and the inner tank 20, and the outer tank 10 and the inner tank 20 are spaced apart.

[0048] Since the heat insulation piece 33 is arranged between the upper support column 31 and the lower support column 32, the heat insulation piece 33 can block the heat conduction between the upper support column 31 and the lower support column 32, thereby avoiding the heat on the inner tank 20 from being conducted to the outer tank 10 along the support assembly 30, avoiding the loss of heat, and thereby achieving heat preservation of the inner tank 20.

[0049] It should be noted that the upper support column 31 and the lower support column 32 can be made of low-temperature-resistant steel to ensure the structural strength of the upper support column 31 and the lower support column 32, so that the upper support column 31 and the lower support column 32 can support the inner tank 20.

[0050] In addition, the surfaces of the upper support column 31 and the lower support column 32 can be wrapped with pearlite with heat insulation performance to avoid the surfaces of the upper support column 31 and the lower support column 32 conducting heat and improve the heat insulation effect of the upper support column 31 and the lower support column 32.

[0051] At the same time, the heat insulation piece 33 can be made of glass steel plate, so that the heat insulation piece 33 can be connected between the upper support column 31 and the lower support column 32, that is, the cold bridge between the upper support column 31 and the lower support column 32 can be avoided, and the heat insulation piece 33 can support the inner tank 20 and avoid the inner tank 20 and the medium inside from crushing the heat insulation piece 33.

[0052] In other embodiments, the heat insulation piece 33 can be made of low-temperature-resistant heat insulation ceramic or low-temperature-resistant heat insulation plastic, etc. to block the heat conduction between the upper support column 31 and the lower support column 32.

[0053] Referring to Figure 2 The bottom of the upper support column 31 can be provided with an upper pressing plate 311, the top of the lower support column 32 can be provided with a lower pressing plate 321, and the upper pressing plate 311 and the lower pressing plate 321 are respectively attached to the upper and lower sides of the heat insulation piece 33, so that the heat insulation piece 33 can be connected and supported between the upper support column 31 and the lower support column 32.

[0054] Meanwhile, the upper pressing plate 311 is protruded outward from the outer wall of the upper supporting column 31 and forms an upper connecting part 312, and the lower pressing plate 321 is protruded outward from the outer wall of the lower supporting column 32 and forms a lower connecting part 322. The upper connecting part 312 and the lower connecting part 322 are both used for mounting the connecting member 34, so that the upper pressing plate 311 and the lower pressing plate 321 are fastened on the upper and lower sides of the heat insulation member 33 through the connecting member 34.

[0055] In the embodiment, the upper pressing plate 311 and the lower pressing plate 321 can be provided as connecting flanges, and the upper pressing plate 311 can be welded at the bottom of the upper supporting column 31, and the lower pressing plate 321 can be welded at the top of the lower supporting column 32. Of course, the upper pressing plate 311 and the lower pressing plate 321 can also be provided as ear plates protruding from the outer wall, so that the upper supporting column 31 and the lower supporting column 32 can be fixedly connected through the ear plates.

[0056] It should be noted that the connecting member 34 can be provided as a connecting buckle, a connecting sleeve or a connecting bolt, etc., so as to connect the upper supporting column 31 and the lower supporting column 32 on the upper and lower sides of the heat insulation member 33. In the embodiment, the connecting member 34 is preferably a connecting bolt.

[0057] Specifically, the upper connecting part 312 and the lower connecting part 322 can be provided with connecting holes 313, and the heat insulation member 33 is provided with through holes 331 corresponding to the connecting holes 313, so as to pass the connecting member 34, i.e. the connecting bolt is passed in the connecting holes 313 and the through holes 331, so that the upper pressing plate 311 and the lower pressing plate 321 are fastened on the upper and lower sides of the heat insulation member 33 through the connecting member 34, and the upper supporting column 31 and the lower supporting column 32 are stably connected.

[0058] Referring to Figure 2 , the supporting assembly 30 further comprises a heat insulation gasket 35. The heat insulation gasket 35 is sleeved in the connecting hole 313 and is insulated between the upper pressing plate 311 or the lower pressing plate 321 and the connecting member 34, so as to avoid the connecting member 34 from contacting the upper pressing plate 311 or the lower pressing plate 321 to form a cold bridge, thereby reducing the heat conduction performance of the whole supporting assembly 30.

[0059] Specifically, the heat insulation gasket 35 is provided with a connected abutting boss 351 and a clamping column 352. The diameter of the abutting boss 351 is greater than the diameter of the clamping column 352, so that when the heat insulation member 33 is sleeved in the connecting hole 313, the clamping column 352 can be clamped in the connecting hole 313, and the abutting boss 351 can abut on the outer end edge of the connecting hole 313 and abut against the connecting member 34, so as to insulate the connecting member 34 from contacting the surface of the upper pressing plate 311 or the lower pressing plate 321.

[0060] In the embodiment, the thermal insulation gasket 35 can be made of glass fiber reinforced plastic. Of course, in other embodiments, the thermal insulation gasket 35 can also be made of thermal insulation plastic.

[0061] Referring to Figure 1 , the double-layer low-temperature spherical tank can further include a pull rod assembly 40.

[0062] The pull rod assembly 40 is inclined and connected between two adjacent lower support columns 32 to limit the two adjacent lower support columns 32 together. Specifically, two pull rod assemblies 40 are arranged between two adjacent lower support columns 32, and the two pull rod assemblies 40 are inclined to cross each other and limit the two adjacent lower support columns 32 together to prevent the adjacent lower support columns 32 from shaking. Therefore, the plurality of support assemblies 30 are limited by the pull rod assembly 40, so that the plurality of support assemblies 30 can maintain a state of extending vertically, thereby improving the support effect of the support assembly 30 on the inner tank 20.

[0063] In the embodiment, the pull rod assembly 40 can include a first pull rod 41 and a second pull rod 42. The ends of the first pull rod 41 and the second pull rod 42 are respectively connected to two adjacent lower support columns 32, and the end of the first pull rod 41 away from the lower support column 32 is connected to the end of the second pull rod 42 away from the lower support column 32, so that the first pull rod 41 and the second pull rod 42 can limit the two adjacent lower support columns 32.

[0064] At the same time, the surfaces of the first pull rod 41 and the second pull rod 42 can be wrapped with pearlescent sand with thermal insulation performance to avoid the surfaces of the first pull rod 41 and the second pull rod 42 conducting heat outward.

[0065] Referring to Figure 1 , the double-layer low-temperature spherical tank can further include a filler 50 for thermal insulation. The filler 50 is filled between the inner wall of the outer tank 10 and the outer wall of the inner tank 20 to insulate and thermally insulate the inner tank 20. That is, the filler 50 is filled in the accommodation space 11 and fills the accommodation space 11 together with the inner tank 20.

[0066] In the embodiment, the filler 50 can be made of perlite thermal insulation material to reduce heat transfer between the outer tank 10 and the inner tank 20.

[0067] It should be noted that since the support assembly 30 and the pull rod assembly 40 are arranged in the accommodation space 11, and the filler 50 is also filled in the accommodation space 11, when the filler 50 is filled, the pull rod assembly 40 between the two adjacent lower support columns 32 will affect the filled filler 50, that is, the pull rod assembly 40 will interfere with the filling of the filler 50, so that the filler 50 is not easy to fill to the appropriate position. Therefore, in the embodiment, the second pull rod 42 can move relative to the first pull rod 41 to adjust the overall length of the first pull rod 41 and the second pull rod 42, so that the first pull rod 41 and the second pull rod 42 can avoid the filler 50 to facilitate the filling of the filler 50.

[0068] Specifically, the opposite ends of the first pull rod 41 and the second pull rod 42 can be provided with internal threads and external threads, and the overall length of the first pull rod 41 and the second pull rod 42 can be changed by adjusting the length of the threaded connection. At the same time, the opposite ends of the first pull rod 41 and the second pull rod 42 can also be provided with sleeves and a plurality of clamping holes, and the overall length of the first pull rod 41 and the second pull rod 42 can be changed by adjusting the clamping position of the sleeves and the clamping holes.

[0069] As can be seen from the above, the double-layer low-temperature spherical tank sets the inner tank 20 in the accommodation space 11 of the outer tank 10, and supports the inner tank 20 between the outer tank 10 and the inner tank 20 through the support assembly 30, so that the outer tank 10 and the inner tank 20 are arranged in a spaced manner, thereby reducing the heat loss of the medium inside the inner tank 20. At the same time, the support assembly 30 is arranged as the upper support column 31 and the lower support column 32, and the heat-insulating member 33 with heat-insulating function is arranged between the upper support column 31 and the lower support column 32, so as to avoid heat conduction along the upper support column 31 and the lower support column 32 to the outer tank 10, further enhancing the heat-insulating effect between the outer tank 10 and the inner tank 20, and ensuring the heat preservation and insulation effect of the double-layer low-temperature spherical tank on the low-temperature medium.

[0070] Although the present application has been described with reference to several exemplary embodiments, it is understood that the terms used are illustrative and not restrictive terms. Since the present application can be embodied in various forms without departing from the spirit or essential characteristics thereof, it should be understood that the above-described embodiments are not limited to any of the aforementioned details, but are to be interpreted broadly within the spirit and scope of the appended claims, and all changes and modifications that fall within the scope of the claims or their equivalents are intended to be embraced by the claims.

Claims

1. A double-walled cryogenic spherical tank for storing a cryogenic medium, characterized in that, The double-layer low-temperature spherical tank comprises: an outer tank, inside which a sealed accommodation space is arranged; an inner tank, inside which a storage cavity is arranged for storing low-temperature medium, and the inner tank is accommodated in the accommodation space; a support assembly extending in the vertical direction and supported between the inner wall of the outer tank and the outer wall of the inner tank, so that the inner tank and the outer tank are spaced apart; the support assembly is arranged in a plurality of, and the plurality of support assemblies are arranged in axial symmetry along a vertical axis; the support assembly comprises an upper support column, a lower support column, and a thermal insulation piece; the upper support column is connected to the inner tank, the lower support column is connected to the outer tank, and the upper support column is connected to the lower support column through the thermal insulation piece for blocking heat conduction between the upper support column and the lower support column; wherein the outer tank comprises a bottom plate and an outer shell arranged on the bottom plate; the outer shell is connected to the bottom plate and forms the accommodation space; the top of the bottom plate extends in the horizontal direction to form a support surface, and the lower support column is fixed to the support surface of the bottom plate; the outer shell is provided with a hemispherical part and a cylindrical part; the hemispherical part is arranged as a hemispherical shell, and the cylindrical part is arranged as a cylindrical shell; the bottom edge of the hemispherical part is welded to the top edge of the cylindrical part, so that the cylindrical part can support the hemispherical part; the bottom edge of the cylindrical part is welded to the bottom plate, so that the hemispherical part, the cylindrical part and the bottom plate are enclosed to form the accommodation space.

2. The double-walled cryogenic sphere according to claim 1, characterized in that The bottom of the upper support column is provided with an upper pressing plate which protrudes outward from the outer wall of the upper support column and forms an upper connecting part; the top of the lower support column is provided with a lower pressing plate which protrudes outward from the outer wall of the lower support column and forms a lower connecting part; the upper pressing plate and the lower pressing plate are respectively attached to the upper and lower sides of the thermal insulation piece; the upper connecting part and the lower connecting part are used to install a connecting piece, so that the upper pressing plate and the lower pressing plate are fastened to the upper and lower sides of the thermal insulation piece through the connecting piece.

3. The double-walled cryogenic sphere according to claim 2, characterized in that The upper connecting part and the lower connecting part are both provided with connecting holes; the thermal insulation piece is provided with a through hole; the through hole is arranged corresponding to the connecting hole for penetrating the connecting piece, so that the upper pressing plate and the lower pressing plate are fastened to the upper and lower sides of the thermal insulation piece through the connecting piece.

4. The double-walled cryogenic sphere according to claim 3, characterized in that The thermal insulation piece is arranged as a glass steel plate to be connected between the upper support column and the lower support column.

5. The double-walled cryogenic sphere of claim 3, wherein, The support assembly further comprises a thermal insulation gasket; the thermal insulation gasket is sleeved in the connecting hole and is isolated between the upper pressing plate or the lower pressing plate and the connecting piece.

6. The double-walled cryogenic sphere of claim 1, wherein, The inner tank is arranged as a spherical tank body; the inner tank is connected to the top of the bottom plate through the support assembly, and the inner tank and the hemispherical part are arranged with the same spherical center, and the outer wall of the inner tank and the inner wall of the hemispherical part are spaced apart.

7. The double-walled cryogenic sphere of claim 1, wherein, The application also comprises a pull rod assembly, which is arranged obliquely and connected between two adjacent lower support columns to limit the two adjacent lower support columns; the pull rod assembly comprises a first pull rod and a second pull rod; the ends of the first pull rod and the second pull rod are respectively connected to two adjacent lower support columns, and the end of the first pull rod away from the lower support column is connected to the second pull rod; the second pull rod can move relative to the first pull rod to adjust the overall length of the first pull rod and the second pull rod.

8. The double-walled cryogenic sphere of claim 1, wherein, The application also comprises a filling piece for heat insulation, which is filled between the inner wall of the outer tank and the outer wall of the inner tank to insulate the inner tank.

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