Low-temperature container

Abstract

The invention relates to a low-temperature container. Comprising an inner cylinder and an outer cylinder, a vacuum interlayer is arranged between the inner cylinder and the outer cylinder, and the inner cylinder is used for containing low-temperature liquid; an extension pipe is connected to the outer wall of the seal head at one end of the inner cylinder, and the other end of the extension pipe is not in contact with the inner wall of the outer cylinder; the side wall of the extension pipe is connected with a plurality of sliding supporting assemblies. Each sliding supporting assembly comprises a shell, a first inner pipe, a second inner pipe, a first connecting assembly, a second connecting assembly and a third connecting assembly. One end of the first inner pipe is connected with the side wall of the extension pipe through a first connecting assembly, and the other end is connected with one end of the second inner pipe through a second connecting assembly; the opening end of the shell penetrates through the outer cylinder and then sleeves the second inner pipe, and the other end of the shell is fixedly connected with the outer cylinder. The other end of the second inner pipe is connected with the third connecting assembly, the third connecting assembly is fixedly connected with the inner wall face of the shell, and the first inner pipe, the second inner pipe, the first connecting assembly and the second connecting assembly are all not in contact with the inner wall of the shell. The heat leakage amount is low, and the economic loss is small.

Description

Technical Field

[0001] The present invention relates to the technical field of cryogenic containers, and in particular to a cryogenic container. Background Art

[0002] The key to storage and transportation of cryogenic liquids (such as liquid hydrogen) is to keep them cold. At present, in order to avoid and reduce the evaporation loss of cryogenic liquids during storage and transportation, low-temperature horizontal containers usually adopt a double-wall structure, that is, composed of an inner cylinder and an outer cylinder that are arranged in sequence, with a vacuum interlayer between the inner cylinder and the outer cylinder, and a support structure is set in the vacuum interlayer.

[0003] However, due to the limited size of the interlayer of the cryogenic container, the heat conduction path of the supporting structure of the existing cryogenic container is short, resulting in a large overall heat leakage of the cryogenic container, causing serious economic losses.

[0004] Therefore, there is an urgent need to provide a low-temperature container to solve the above technical problems. Summary of the invention

[0005] The embodiment of the present invention provides a low-temperature container with low heat leakage and small economic loss.

[0006] One embodiment of the present invention provides a cryogenic container, comprising: an inner cylinder and an outer cylinder, wherein a vacuum interlayer is provided between the inner cylinder and the outer cylinder, and the inner cylinder is used to contain cryogenic liquid;

[0007] An extension tube is connected to the outer wall of the end cap at one end of the inner cylinder, and the other end of the extension tube does not contact the inner wall of the outer cylinder; a plurality of sliding support components are connected to the side wall of the extension tube;

[0008] Each of the sliding support assemblies comprises: an outer shell, a first inner tube, a second inner tube, a first connecting assembly, a second connecting assembly and a third connecting assembly;

[0009] One end of the first inner tube is connected to the side wall of the extension tube through the first connecting assembly, and the other end is connected to one end of the second inner tube through the second connecting assembly; the open end of the outer shell passes through the outer cylinder and is sleeved on the outside of the second inner tube, and the other end is fixedly connected to the outer cylinder; the other end of the second inner tube is connected to the third connecting assembly, and the third connecting assembly is fixedly connected to the inner wall of the outer shell, and the first inner tube, the second inner tube, the first connecting assembly and the second connecting assembly are not in contact with the inner wall of the outer shell.

[0010] The embodiment of the present invention provides a low-temperature container. First, the sliding support assembly is installed on the side wall of the extension tube, so that the sliding support assembly passes through the radial gap between the inner cylinder head and the outer cylinder head. Since the radial space is relatively large, the operating space of the sliding support assembly can be greatly increased, and a longer first inner tube and second inner tube are used. Secondly, the first inner tube and the second inner tube are connected in sequence, the outer shell is sleeved on the outside of the second inner tube, and one end of the second inner tube is connected to the inner wall of the outer shell through the third connecting assembly. In this way, during storage and transportation, the heat of the low-temperature medium will flow through the extension tube, the first connecting assembly, the first inner tube, the second connecting assembly, the second inner tube and the third connecting assembly in sequence to reach the outer shell, and then be transferred from the outer shell to the outer cylinder, thereby greatly increasing the heat leakage path, reducing heat leakage, and reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 A schematic diagram of the structure of a low-temperature container provided by an embodiment of the present invention;

[0013] Figure 2 for Figure 1 Schematic diagram of the middle DD section;

[0014] Figure 3 for Figure 1 A cross-sectional schematic diagram of the sliding support assembly;

[0015] Figure 4 for Figure 1 A partial enlarged view of the P in the middle;

[0016] Figure 5 A schematic structural diagram of a cryogenic container provided in another embodiment of the present invention;

[0017] Figure 6 for Figure 5 Schematic diagram of the middle AA section;

[0018] Figure 7 for Figure 6 A partial enlarged view of point I in the middle;

[0019] Figure 8 for Figure 7 A partial enlarged view of point H in the middle.

[0020] Reference numerals:

[0021] 10-Inner cylinder;

[0022] 20-Outer cylinder;

[0023] 30- extension tube;

[0024] 40-sliding support assembly;

[0025] 401-housing; 402-first inner tube; 403-second inner tube;

[0026] 404-first connection component;

[0027] 4041-first support; 4042-first pin shaft; 4043-first connecting rod support;

[0028] 405-second connection component;

[0029] 4051-second connecting rod support; 4052-second pin shaft; 4053-third connecting rod support;

[0030] 406-third connection component;

[0031] 4061- fourth connecting rod support; 4062- force bearing circular plate; 4063- force relieving circular plate; 4064- fixing ring;

[0032] 50-fixed support assembly;

[0033] 501-first round tube; 502-second round tube; 503-third round tube; 504-fourth round tube; 505-first reinforcing support; 506-second reinforcing support; 507-third reinforcing support; 508-sealing ring; 509-sealing plate; 510-first supporting tube; 511-first extension tube; 512-first supporting seat; 513-first supporting cover; 514-second supporting cover; 515-first pad; 516-second pad; 517-first head. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] like Figure 1 to Figure 3 As shown, an embodiment of the present invention provides a cryogenic container, comprising: an inner cylinder 10 and an outer cylinder 20, wherein a vacuum interlayer is provided between the inner cylinder 10 and the outer cylinder 20, and the inner cylinder 10 is used to contain cryogenic liquid;

[0036] An extension tube 30 is connected to the outer wall of the end cap at one end of the inner cylinder 10, and the other end of the extension tube 30 does not contact the inner wall of the outer cylinder 20; a plurality of sliding support assemblies 40 are connected to the side wall of the extension tube 30;

[0037] Each sliding support assembly 40 includes: an outer shell 401, a first inner tube 402, a second inner tube 403, a first connecting assembly 404, a second connecting assembly 405 and a third connecting assembly 406;

[0038] One end of the first inner tube 402 is connected to the side wall of the extension tube 30 through the first connecting component 404, and the other end is connected to one end of the second inner tube 403 through the second connecting component 405; the open end of the outer shell 401 passes through the outer cylinder 20 and is sleeved on the outside of the second inner tube 403, and the other end is fixedly connected to the outer cylinder 20; the other end of the second inner tube 403 is connected to the third connecting component 406, and the third connecting component 406 is fixedly connected to the inner wall surface of the outer shell 401, and the first inner tube 402, the second inner tube 403, the first connecting component 404 and the second connecting component 405 are not in contact with the inner wall of the outer shell 401.

[0039] In this embodiment, first, the sliding support assembly 40 is installed on the side wall of the extension tube 30, so that the sliding support assembly 40 passes through the radial gap between the end cap of the inner cylinder 10 and the end cap of the outer cylinder 20. Since the radial space is relatively large, the operating space of the sliding support assembly 40 can be greatly increased, and a longer first inner tube 402 and a second inner tube 403 are used. Secondly, the first inner tube 402 and the second inner tube 403 are connected in sequence, the outer shell 401 is sleeved on the outside of the second inner tube 403, and one end of the second inner tube 403 is connected to the inner wall of the outer shell 401 through the third connecting assembly 406. In this way, during the storage and transportation process, the heat of the low-temperature medium will flow through the extension tube 30, the first connecting assembly 404, the first inner tube 402, the second connecting assembly 405, the second inner tube 403 and the third connecting assembly 406 in sequence to reach the outer shell 401, and then be transferred from the outer shell 401 to the outer cylinder 20, thereby greatly increasing the heat leakage path, reducing heat leakage, and reducing economic losses.

[0040] It should be noted that during the storage and transportation of the cryogenic container, the inner cylinder 10 is affected by the cryogenic medium and will shrink and deform. Since the sliding support assembly 40 is arranged on the end cap of the inner cylinder 10, it is far away from the fixed point at the other end. Therefore, the shrinkage displacement from the fixed end to the sliding end is large, resulting in a large pulling force on the sliding support assembly 40, which poses a safety risk.

[0041] In order to solve the above problems, the inventor proposes that the first connecting component 404 and the second connecting component 405 can be connected by a pin shaft, and the shrinkage displacement can be effectively absorbed through the movable connection.

[0042] In some embodiments, the first connection assembly 404 includes: a first support 4041, a first pin 4042 and a first connecting rod support 4043;

[0043] A cylindrical boss is disposed at one end of the first connecting rod support 4043, and two parallel-arranged support ears are disposed at the other end. A first pin hole matching the first pin shaft 4042 is disposed on the first support 4041 and each support ear respectively.

[0044] One end of the first support 4041 is connected to the side wall of the extension tube 30, and the other end is inserted between the two support ears of the first connecting rod support 4043. The first pin shaft 4042 passes through the first support 4041 and the first pin hole of each support ear in turn; the cylindrical boss of the first connecting rod support 4043 is inserted into one end of the first inner tube 402 and sealed therewith.

[0045] In some embodiments, the second connecting assembly 405 includes: a second pin 4052, a second connecting rod support 4051 and a third connecting rod support 4053;

[0046] A cylindrical boss is provided at one end of the second connecting rod support 4051, and two parallel supporting ears are provided at the other end; a cylindrical boss is provided at one end of the third connecting rod support 4053, and a supporting ear is provided at the other end; each supporting ear is provided with a second pin hole matching the second pin shaft 4052;

[0047] The cylindrical boss of the second connecting rod support 4051 is inserted into the other end of the first inner tube 402 and is sealed therewith; the cylindrical boss of the third connecting rod support 4053 is inserted into one end of the second inner tube 403 and is sealed therewith; the support ear of the third connecting rod support 4053 is inserted between the two support ears of the second connecting rod support 4051, and the second pin shaft 4052 passes through the second pin hole of each support ear in turn.

[0048] In the above embodiment, the first connecting component 404 and the second connecting component 405 are connected by a pin shaft. When the inner cylinder 10 is subjected to impact force and cold shrinkage, the displacement caused by the axial force will be automatically absorbed, so that the overall structural force is reduced and the structure is more stable.

[0049] In some embodiments, the third connecting assembly 406 includes a fourth connecting rod support 4061, a force-bearing circular plate 4062, a force-relieving circular plate 4063, and a fixing ring 4064, which are coaxially arranged in sequence; the outer diameter of the force-bearing circular plate 4062 is equal to the inner diameter of the housing 401, and the side wall of the force-bearing circular plate 4062 is sealed and connected to the inner wall surface of the housing 401;

[0050] A cylindrical boss is provided at one end of the fourth connecting rod support 4061, and a round rod is provided at the other end. The cylindrical boss is inserted into an end of the second inner tube 403 away from the first inner tube 402 and is sealedly connected thereto;

[0051] The centers of the force-bearing circular plate 4062 and the force-relieving circular plate 4063 are respectively provided with round holes matching the round rods. The round rods respectively pass through the round holes on the force-bearing circular plate 4062 and the force-relieving circular plate 4063, and the force-relieving circular plate 4063 is fastened to the force-bearing circular plate 4062 by the fixing ring 4064.

[0052] In this embodiment, by adopting the above connection method, the outer shell 401 can be tightly connected with the second inner tube 403 and the outer cylinder 20, thereby playing an effective supporting role.

[0053] In some embodiments, in order to ensure the stability of the cryogenic container, at least one fixed support assembly 50 is also required to be provided at the other end of the cryogenic container. One end of each fixed support assembly 50 is fixedly connected to the inner cylinder 10, and the other end is fixedly connected to the outer cylinder 20. Specifically, the following two methods can be adopted:

[0054] The first type is: there is one fixed support assembly 50;

[0055] like Figure 4 As shown, the fixed support assembly 50 includes: at least four first circular tubes 501, second circular tubes 502, third circular tubes 503 and fourth circular tubes 504 which are coaxially sleeved in sequence; one end of the first circular tube 501 is connected to the outer wall of the head at the other end of the inner cylinder 10, and the other end is connected to one end of the second circular tube 502 through a first reinforcing support 505, the other end of the second circular tube 502 is connected to one end of the third circular tube 503 through a second reinforcing support 506, the other end of the third circular tube 503 is connected to one end of the fourth circular tube 504 through a third reinforcing support 507, and the outer wall of the fourth circular tube 504 is sealed and connected to the outer cylinder 20;

[0056] The outer wall surfaces of the first circular tube 501, the second circular tube 502, the third circular tube 503 and the fourth circular tube 504 are not in contact with each other; the thermal conductivity coefficients of the first reinforcing support 505, the second reinforcing support 506 and the third reinforcing support 507 are all lower than the preset value.

[0057] In this embodiment, first, several circular tubes are nested in sequence, and the circular tubes are connected only at the ends by reinforcing supports; and because the thermal conductivity of each reinforcing support is low, the heat of the inner cylinder 10 will flow along the wall of each circular tube in a U-shaped circuitous manner, thereby extending the heat leakage path and reducing heat leakage.

[0058] In some embodiments, the fixed support assembly 50 further includes a sealing ring 508 and a sealing plate 509;

[0059] One end of the sealing ring 508 is sleeved on the outside of the fourth circular tube 504 and is sealed and connected to the outer cylinder 20, and the sealing plate 509 is sealed and connected to the other end of the sealing ring 508; the internal space formed by the fixed support assembly 50 is in a vacuum state.

[0060] In this embodiment, by providing a sealing ring 508 and a sealing plate 509, a sealed space can be formed, thereby reducing heat exchange between the environment and the inner cylinder 10 and each circular tube, and reducing leakage loss.

[0061] The second type is: there are multiple fixed support components 50;

[0062] like Figure 5-7 As shown, each fixed support assembly 50 is evenly distributed along the axial direction of the other end of the inner cylinder 10;

[0063] Each fixed support assembly 50 includes: a first support tube 510, a first extension tube 511, a first support seat 512 and a first support cover 513;

[0064] A plurality of first through holes are provided on the shell of the inner cylinder 10, and a plurality of second through holes corresponding to each of the first through holes are provided on the shell of the outer cylinder 20; one end of the first extension tube 511 passes through a first through hole to enter the inner cylinder 10, and the other end is sealed and connected to the inner cylinder 10; the side wall of the first support seat 512 is fixedly connected to the inner wall surface of the end of the first extension tube 511 away from the outer cylinder 20; one end of the first support tube 510 is fixedly connected to the end surface of the first support seat 512 close to the outer cylinder 20, and the other end passes through the corresponding second through hole and is connected to the inner wall of the top surface of the first support cover 513; the side wall of the first support cover 513 is inserted into the corresponding second through hole, and the outer wall surface of the first support cover 513 is sealed and connected to the outer cylinder 20, and the inner wall surface does not contact the wall surface of the first support tube 510.

[0065] In this embodiment, first, for each fixed support assembly 50, by inserting the first extension tube 511 into the inner cylinder 10, the length of the first support tube 510 can be lengthened, thereby extending the heat transfer path of the cryogenic medium. Secondly, by setting the first support cover 513, the outer wall surface of the first support cover 513 is sealed and connected to the outer cylinder 20, and the inner wall surface is not in contact with the wall surface of the first support tube 510. Therefore, after the heat flow reaches the top of the first support cover 513, it needs to be transferred to its side wall until it reaches the connection between the side wall and the outer cylinder 20, thereby further extending the heat transfer path of the cryogenic medium. It can be seen that the present application can greatly extend the heat transfer path of the heat flow, reduce heat leakage, and reduce economic losses.

[0066] In addition, in order to ensure that the low-temperature container is supported stably and evenly, multiple fixed support assemblies 50 are evenly distributed along the circumference of the inner cylinder 10. The number of fixed support assemblies 50 is preferably four, and of course the user can also set it according to needs. In addition, the material of the first support tube 510 is preferably a material with high strength and low thermal conductivity such as glass fiber reinforced plastic.

[0067] In some embodiments, Figure 7and Figure 8 As shown, each fixed support assembly 50 further includes a second support cover 514;

[0068] The second support cover 514 is sleeved on the outside of the first support cover 513, the lower end of the first support cover 513 is fixedly connected to the lower end of the second support cover 514, the outer wall surface of the upper end of the second support cover 514 is sealed to the outer cylinder 20, and except for the fixed connection between the first support cover 513 and the second support cover 514, other areas of the two are not in contact.

[0069] In this step, since the second support cover 514 is provided and there is a gap in the interlayer between the first support cover 513 and the second support cover 514, it is equivalent to adding a folding structure to extend the heat leakage path. Specifically, when the heat reaches the top surface of the first support cover 513, it needs to be transferred from the top surface to the bottom end of its side wall, and then transferred to the side wall of the second support cover 514 through the connection between it and the second support cover 514. The heat is further transferred along the side wall of the second support cover 514 until it reaches the outer cylinder 20. In this way, the heat leakage path can be further extended and the heat leakage loss can be reduced.

[0070] In some embodiments, each fixed support assembly 50 further includes a first backing plate 515 and a second backing plate 516;

[0071] Each first pad 515 is coaxially disposed with a first through hole and fixed to the outer wall of the inner cylinder 10 ; each second pad 516 is coaxially disposed with a second through hole and fixed to the outer wall of the outer cylinder 20 .

[0072] In this embodiment, the strength of the cylinder is reduced due to the through holes formed in the inner cylinder 10 and the outer cylinder 20. In this embodiment, the cylinder can be effectively reinforced by welding the first pad 515 and the second pad 516 around the hole.

[0073] In some embodiments, the cross-section of the first extension tube 511 is circular; each fixed support assembly 50 further includes a first head 517; the open ends of the first head 517 are fixedly connected to the first extension tube 511 and the first support seat 512 respectively.

[0074] In this embodiment, the stability of the fixed support assembly 50 can be enhanced by providing the first sealing head 517 .

[0075] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the statement "comprise one..." do not exclude the existence of other identical factors in the process, method, article or equipment including the elements.

[0076] Finally, it should be noted that the above is only a preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A cryogenic container, characterized in that: include: An inner cylinder (10) and an outer cylinder (20), wherein a vacuum interlayer is provided between the inner cylinder (10) and the outer cylinder (20), and the inner cylinder (10) is used for containing a cryogenic liquid; An extension tube (30) is connected to the outer wall of the end cap at one end of the inner cylinder (10), and the other end of the extension tube (30) does not contact the inner wall of the outer cylinder (20); a plurality of sliding support assemblies (40) are connected to the side wall of the extension tube (30); Each of the sliding support assemblies (40) comprises: an outer shell (401), a first inner tube (402), a second inner tube (403), a first connecting assembly (404), a second connecting assembly (405) and a third connecting assembly (406); One end of the first inner tube (402) is connected to the side wall of the extension tube (30) through the first connecting component (404), and the other end is connected to one end of the second inner tube (403) through the second connecting component (405); the open end of the outer shell (401) passes through the outer cylinder (20) and is sleeved on the outside of the second inner tube (403), and the other end is fixedly connected to the outer cylinder (20); the other end of the second inner tube (403) is connected to the third connecting component (406), and the third connecting component (406) is fixedly connected to the inner wall surface of the outer shell (401), and the first inner tube (402), the second inner tube (403), the first connecting component (404) and the second connecting component (405) are not in contact with the inner wall of the outer shell (401).

2. The cryogenic container according to claim 1, characterized in that: The first connecting assembly (404) comprises: a first support (4041), a first pin shaft (4042) and a first connecting rod support (4043); A cylindrical boss is provided at one end of the first connecting rod support (4043), and two supporting ears arranged in parallel are provided at the other end, and a first pin hole matching the first pin shaft (4042) is provided on the first support (4041) and each supporting ear respectively; One end of the first support (4041) is connected to the side wall of the extension tube (30), and the other end is inserted between the two support ears of the first connecting rod support (4043), and the first pin shaft (4042) passes through the first support (4041) and the first pin hole of each support ear in sequence; the cylindrical boss of the first connecting rod support (4043) is inserted into one end of the first inner tube (402) and is sealed therewith.

3. The cryogenic container according to claim 1, characterized in that: The second connecting assembly (405) comprises: a second pin shaft (4052), a second connecting rod support (4051) and a third connecting rod support (4053); One end of the second connecting rod support (4051) is provided with a cylindrical boss, and the other end is provided with two parallel-arranged support ears; one end of the third connecting rod support (4053) is provided with a cylindrical boss, and the other end is provided with a support ear; each support ear is provided with a second pin hole matching the second pin shaft (4052); The cylindrical boss of the second connecting rod support (4051) is inserted into the other end of the first inner tube (402) and is sealed therewith; the cylindrical boss of the third connecting rod support (4053) is inserted into one end of the second inner tube (403) and is sealed therewith; the support ear of the third connecting rod support (4053) is inserted between the two support ears of the second connecting rod support (4051), and the second pin shaft (4052) passes through the second pin hole of each support ear in turn.

4. The cryogenic container according to claim 1, characterized in that: The third connecting assembly (406) comprises a fourth connecting rod support (4061), a force-bearing circular plate (4062), a force-relieving circular plate (4063) and a fixing ring (4064) which are coaxially arranged in sequence; the outer diameter of the force-bearing circular plate (4062) is equal to the inner diameter of the outer shell (401), and the side wall of the force-bearing circular plate (4062) is sealedly connected to the inner wall surface of the outer shell (401); One end of the fourth connecting rod support (4061) is provided with a cylindrical boss, and the other end is provided with a round rod, and the cylindrical boss is inserted into an end of the second inner tube (403) away from the first inner tube (402) and is sealedly connected thereto; The centers of the force-bearing circular plate (4062) and the force-relieving circular plate (4063) are respectively provided with circular holes matching the round rods. The round rods respectively pass through the circular holes on the force-bearing circular plate (4062) and the force-relieving circular plate (4063), and the force-relieving circular plate (4063) is fastened to the force-bearing circular plate (4062) by the fixing ring (4064).

5. The cryogenic container according to any one of claims 1 to 4, characterized in that: It also comprises at least one fixed support assembly (50); one end of each fixed support assembly (50) is fixedly connected to the inner cylinder (10), and the other end is fixedly connected to the outer cylinder (20).

6. The cryogenic container according to claim 5, characterized in that: The fixed support assembly (50) is one; The fixed support assembly (50) comprises: at least four first circular tubes (501), second circular tubes (502), third circular tubes (503) and fourth circular tubes (504) which are coaxially sleeved in sequence; one end of the first circular tube (501) is connected to the outer wall of the head at the other end of the inner cylinder (10), and the other end is connected to one end of the second circular tube (502) through a first reinforcing support (505); the other end of the second circular tube (502) is connected to one end of the third circular tube (503) through a second reinforcing support (506); the other end of the third circular tube (503) is connected to one end of the fourth circular tube (504) through a third reinforcing support (507); and the outer wall of the fourth circular tube (504) is sealed and connected to the outer cylinder (20); The outer wall surfaces of the first circular tube (501), the second circular tube (502), the third circular tube (503) and the fourth circular tube (504) are not in contact; and the thermal conductivity coefficients of the first reinforcing support (505), the second reinforcing support (506) and the third reinforcing support (507) are all lower than a preset value.

7. The cryogenic container according to claim 6, characterized in that: The fixed support assembly (50) further comprises a sealing ring (508) and a sealing plate (509); One end of the sealing ring (508) is sleeved on the outside of the fourth circular tube (504) and is sealedly connected to the outer cylinder (20), and the sealing plate (509) is sealedly connected to the other end of the sealing ring (508); the internal space formed by the fixed support assembly (50) is in a vacuum state.

8. The cryogenic container according to claim 5, characterized in that: There are a plurality of fixed support assemblies (50), and each of the fixed support assemblies (50) is evenly distributed along the axial direction of the other end of the inner cylinder (10); Each of the fixed support assemblies (50) comprises: a first support tube (510), a first extension tube (511), a first support seat (512) and a first support cover (513); The shell of the inner cylinder (10) is provided with a plurality of first through holes, and the shell of the outer cylinder (20) is provided with a plurality of second through holes corresponding to each of the first through holes; one end of the first extension tube (511) passes through one of the first through holes and enters the inner cylinder (10), and the other end is sealedly connected to the inner cylinder (10); the side wall of the first support seat (512) is fixedly connected to the inner wall surface of the end of the first extension tube (511) away from the outer cylinder (20); one end of the first support tube (510) is fixedly connected to the end surface of the first support seat (512) close to the outer cylinder (20), and the other end passes through the corresponding second through hole and is connected to the inner wall of the top surface of the first support cover (513); the side wall of the first support cover (513) is inserted into the corresponding second through hole, and the outer wall surface of the first support cover (513) is sealedly connected to the outer cylinder (20), and the inner wall surface does not contact the wall surface of the first support tube (510).

9. The cryogenic container according to claim 8, characterized in that Each of the fixed support assemblies (50) further comprises a second support cover (514); The second support cover (514) is sleeved on the outside of the first support cover (513), the lower end of the first support cover (513) is fixedly connected to the lower end of the second support cover (514), the outer wall surface of the upper end of the second support cover (514) is sealedly connected to the outer cylinder (20), and except for the fixed connection between the first support cover (513) and the second support cover (514), other areas of the two are not in contact.

10. The cryogenic container according to claim 9, characterized in that Each of the fixed support assemblies (50) further comprises a first pad (515) and a second pad (516); Each of the first pads (515) is coaxially arranged with one of the first through holes and fixed to the outer wall of the inner cylinder (10); each of the second pads (516) is coaxially arranged with one of the second through holes and fixed to the outer wall of the outer cylinder (20).

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