Low-temperature heat insulation container

Abstract

The invention discloses a low-temperature heat insulation container, which belongs to the technical field of low-temperature liquid storage and transportation equipment and comprises a container assembly, a first support structure and a second support structure. A first supporting structure and a second supporting structure are arranged at the two ends of a container assembly respectively and used for achieving connection of an inner container part and an outer container part, the first supporting structure can serve as a base point when the temperature of the inner container part changes, and the inner container part freely extends or shortens; meanwhile, the first supporting structure can bear axial impact load so as to reduce pipeline deformation, and based on relative sliding between the second neck pipe fitting and the second supporting plate in the second supporting structure, the deformation amount of contraction of the content device can be eliminated, and heat loss on a supporting path of the second neck pipe fitting is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of cryogenic liquid storage and transportation equipment, and specifically relates to a cryogenic insulated container. Background Technology

[0002] Double-walled cylindrical cryogenic storage devices offer advantages such as low manufacturing and assembly difficulty, and the ability to be used for both fixed and mobile transport and storage. They mainly consist of an outer container, an inner container, an insulated interlayer, a wave-damping device, and an internal support structure. The inner container stores cryogenic liquids (such as liquid helium, liquid hydrogen, LNG, etc.) and is supported within the outer container by the internal support structure. During transportation, the cryogenic liquid will exert impact and sloshing loads on the container itself. Wave-damping structures are used to ensure the stability and safety of the equipment during transportation and use. However, the heat transfer path and heat transfer area of ​​the support structure in existing cryogenic insulated containers are relatively short, allowing external heat leakage into the inner container. This excessive heat leakage can accelerate the vaporization of the cryogenic liquid, making long-term storage and transportation unsuitable.

[0003] To reduce heat leakage between the inner and outer containers, methods such as installing insulating materials between the inner and outer containers and optimizing the connection structure are commonly used. The materials for the support components of cryogenic containers must not only meet the requirements of low thermal conductivity but also high mechanical strength. Support structures in cryogenic containers typically include stainless steel tie rods, straps, hangers, and fiberglass columns. For example, patent CN113154245A uses epoxy fiberglass columns, requiring multiple grinding and fitting of the curved surface of the fiberglass within the gap between the inner and outer containers. Furthermore, due to the large number of columns installed in the circumferential direction, the overall heat leakage is significant. Patent CN113739063A uses steel plate straps that extend obliquely from the inner circumferential wall of the outer container to the inner container for support. Although the straps have a certain length and can effectively mitigate impact, the linear distance between the inner and outer container spaces is limited. When the support rods are directly connected radially, the heat loss is very large, and the temperature is not effectively attenuated along the length of the support rod. Summary of the Invention

[0004] The purpose of this invention is to provide a cryogenic insulated container to solve the problems mentioned in the background art regarding the use of existing storage and transportation devices.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cryogenic insulation container, comprising:

[0006] A container assembly extends along axis O and has a first end and a second end in the axial direction. The container assembly includes a content device and an outer container component disposed around the content device, and an insulating zone is formed between the outer container component and the content device.

[0007] A first support structure is disposed at the first end of the container assembly and constitutes a connection structure between the outer container and the inner device;

[0008] The heat insulation container also includes:

[0009] A second support structure is disposed at the second end of the container assembly and includes:

[0010] The second support plate is fixed to the inner wall of the outer container component;

[0011] At least one second neck tube extends along axis O and has an axial second connecting end and a second extending end, the second extending end passing through the content device and extending into the content device, the second connecting end passing through the second support plate and being spaced apart from the outer container wall.

[0012] Preferably, the second support structure further includes a plurality of sliding units assembled at the opening position of the second support plate and arranged in a circular array, wherein a single sliding unit includes:

[0013] The jacket component is assembled at the opening position of the second support plate and is provided with a groove;

[0014] A sliding member is fitted into the groove and has a surface that contacts the second neck member.

[0015] Preferably, the first support structure includes:

[0016] The first support plate is fixed to the inner wall of the outer container component;

[0017] At least one first neck tube extends along axis O and has an axial first connecting end and a first extending end; the first connecting end is fixed to the first support plate, and the first extending end passes through the content device and extends into the content device;

[0018] The first isolating element is fixed to the inner wall of the content device and located on the periphery of the first neck tube.

[0019] Preferably, there are multiple second neck tubes, each of which is a hollow tube, and the diameters of the multiple second neck tubes are all different. The second support structure further includes:

[0020] The second auxiliary plate body, wherein the second extension ends of a plurality of the second neck tubes are fixed to the second auxiliary plate body.

[0021] Preferably, the outer container further includes a plurality of saddle portions, which are spaced apart along the axial direction, and each saddle portion has:

[0022] The sidewall portion is formed by the vertical extension of the sidewall of the content device and includes two radially symmetrically arranged sidewall units;

[0023] The base plate is connected to the side wall portion and, together with a single side wall unit of the side wall portion, defines a support interval, which is connected to the insulation interval.

[0024] Preferably, the heat-insulating container further includes a plurality of third support structures, each of which is assembled within the support interval and includes a leg member having:

[0025] The first support end is rotatably mounted on the base plate. The rotation axis of the first support end is set horizontally and perpendicular to axis O.

[0026] The second support end is rotatably mounted on the outer wall of the content device. The rotation axis of the second support end is set horizontally and perpendicular to axis O.

[0027] Preferably, the outrigger component has a rod body and spherical portions disposed at both ends of the rod body, and the third support structure further includes:

[0028] The first support is assembled on the base plate.

[0029] The second support is assembled on the outer wall of the content device, and both the first support and the second support are provided with spherical grooves to accommodate the spherical part.

[0030] Preferably, both the first support and the second support have a body portion and a flange portion, and an insulating gasket is provided at the contact position between the body portion and the flange portion.

[0031] Preferably, the insulated container further includes a wave-damping device disposed at the connection position between the internal device and the second support, the wave-damping device comprising:

[0032] The wave-damping plate is fixed to the inner wall of the internal device and is configured as a conical structure, and the wave-damping plate has multiple liquid-passing circular holes.

[0033] Preferably, the wave-damping device further includes:

[0034] A transition plate is assembled on the wave-damping plate, and the transition plate is provided with multiple liquid passage holes.

[0035] Preferably, a portion of the transition plate is fixed to the wave-damping plate by bolts.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] This application establishes a first support structure and a second support structure at both ends of the container assembly to connect the internal device and the external container. The first support structure can serve as a base point when the temperature of the internal device changes, allowing the internal device to freely extend or shorten. Simultaneously, the first support structure can also withstand axial impact loads to reduce pipeline deformation. Based on the relative sliding between the second neck tube and the second support plate in the second support structure, the deformation caused by the shrinkage of the internal device can be eliminated, and heat loss on the support path of the second neck tube can be reduced. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of the heat insulation container;

[0039] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0040] Figure 3 for Figure 1 Enlarged view at point B in the middle;

[0041] Figure 4 for Figure 1 Cross-sectional view along the CC line.

[0042] In the picture:

[0043] 100. Container assembly; 101. Outer container component; 102. Internal component; 103. Insulation zone; 104. Side wall portion; 104a. Side wall unit; 106. Base plate portion; 107. Supporting zone; 108. Reinforcing ring; 109. Interlayer insulation layer; 110. First opening; 111. Second opening;

[0044] 200. First support structure; 201. First support plate; 202. First neck tube; 202a. First connecting end; 202b. First extension end; 203. First isolation member; 204. First auxiliary plate;

[0045] 300. Second support structure; 301. Second support plate; 302. Second neck tube; 302a. Second connecting end; 302b. Second extension end; 303. Second isolation member; 304. Second auxiliary plate; 305. Sliding unit; 306. Jacket member; 307. Sliding member;

[0046] 400. Third support structure; 401. Leg component; 401a. Rod body; 401b. Spherical part; 402. First support seat; 403. Second support seat;

[0047] 500, wave-damping device; 501, wave-damping plate; 502, transition plate; 503, support plate; 504, liquid-passing circular hole; 505, liquid-passing pipe hole. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] A cryogenic insulated container (hereinafter referred to as the insulated container) is mainly composed of a container assembly 100, a first support assembly, and a second support assembly. The container assembly 100 extends approximately along the axis O and has a first end and a second end in the axial direction. Specifically, the container assembly 100 includes a content device 102 and an outer container 101 disposed around the content device 102. The content device 102 is used to store cryogenic liquids (such as liquid helium, liquid hydrogen, and LNG (liquefied natural gas)). The first support assembly and the second support assembly constitute the connection structure between the content device 102 and the outer container 101 and the support structure for the content device 102. That is, the content device 102 is supported in a predetermined position within the outer container 101 by the first support assembly and the second support assembly, and an insulated zone 103 is formed between the content device 102 and the outer container 101. The insulated zone 103 can be insulated by means such as vacuuming to reduce the loss of fluid temperature inside the content device 102.

[0050] In some embodiments, refer to Figure 1 The outer container 101 has multiple reinforcing rings 108 on its inner wall to improve the stability of the outer container 101. Correspondingly, the inner container 102 has an interlayer insulation layer 109 on its outer wall to reduce the heat loss of the fluid inside the inner container 102.

[0051] Reference Figure 1 and 4 Continuing with the description of the container assembly 100, the outer container 101 also has at least two saddle portions. The plurality of saddle portions are arranged at intervals along the axis O. For example, when there are two saddle portions, the two saddle portions are respectively arranged at both ends of the outer container 101 in the axial direction and are arranged symmetrically in the axial direction. Specifically, a single saddle portion includes a side wall portion 104 and a bottom plate portion 106. The side wall portion 104 is formed by extending vertically downward from the side wall of the outer container 101 and includes two radially symmetrically arranged side wall units 104a. The bottom plate portion 106 is arranged at the lower end of the side wall portion 104 and together with the single side wall unit 104a constituting the side wall portion 104, defines a support interval 107. Each single support interval 107 is connected to the insulation interval 103 of the outer container 101 and can be evacuated together with the insulation interval 103.

[0052] In some embodiments, refer to Figure 3 The aforementioned first support component includes a first support structure 200 disposed at the first end of the container assembly 100 and a second support structure 300 disposed at the second end of the container assembly 100. Specifically, the inner device 102 and the outer container 101 are connected at the first end via the first support structure 200, and the inner device 102 and the outer container 101 are connected at the second end via the second support structure 300. See, for details... Figure 3 The aforementioned first support structure 200 includes a first isolation member 203, a first support plate 201, and at least one first neck tube 202. The first support plate 201 is fixed to the inner wall of the first end 101a of the outer container 101. The first neck tube 202 extends along axis O and has an axial first connecting end 202a and a first extending end 202b. The first connecting end 202a of the first neck tube 202 is spaced from the first end of the outer container 101 and connected to the first support plate 201. In some examples, the first connecting end 202a of the first neck tube 202 passes through the first support plate 201 and is connected to it. Figure 3 Continuing with the description of the first support structure 200, the first extension end 202b of the first neck tube 202 passes through the wall of the first end 102a of the content device 102 and extends into the content device 102. That is, the content device 102 has a first opening 110 at the first end 101a for the first neck tube 202 to pass through. Correspondingly, the first isolation member 203 is fixed to the first end 102a of the content device 102 and is disposed on the outside of the first neck tube 202 to form a closure at the first opening 110 of the content device 102 and maintain the airtightness of the content device 102.

[0053] In some embodiments, refer to Figure 3 The aforementioned first neck tube 202 is provided in multiple forms, and the multiple first neck tubes 202 are arranged in a sleeve form, that is, the multiple first neck tubes 202 are all configured as hollow tubes extending along the axis O. Correspondingly, the aforementioned first support structure 200 also includes a first auxiliary plate 204. The first extension ends 202b of the multiple first neck tubes 202 are fixed on the first auxiliary plate 204, and the specifications of the outermost first neck tube 202 are compatible with the specifications of the first opening 110.

[0054] In some embodiments, refer to Figure 2The second support structure 300 includes a second support plate 301, a second spacer 303, and at least one second neck tube. The second support plate 301 is fixed to the inner wall of the second end 101b of the outer container 101. The second neck tube extends along axis O and has an axial second connecting end 302a and a second extending end 302b. The second connecting end 302a of the second neck tube passes through the second support plate 301 and is spaced apart from the inner wall of the second end 101b of the outer container 101. The second extending end 302b of the second neck tube passes through the wall of the second end 102b of the content device 102 and extends into the content device 102. That is, the second end 102b of the content device 102 has a second opening 111 through which the second neck tube 302 passes. The second spacer 303 is fixed to the inner wall of the second end 102a of the content device 102 and is located outside the second neck tube 302 to form a closure at the second opening 111 of the content device 102. Figure 2 Continuing with the description of the second support structure 300, the second support structure 300 further includes a plurality of sliding units 305 disposed at the opening position of the second support plate 301. The plurality of sliding units 305 are arranged in a ring array. In some embodiments, a single sliding unit 305 includes a sleeve member 306 and a sliding member 307. The sleeve member 306 is fitted onto the opening of the second support plate 301 and has a groove. Correspondingly, the sliding member 307 is made of a material such as epoxy fiberglass and is fitted into the groove in the sliding member 307. The sliding member 307 has a surface that contacts the second neck tube 302, that is, the second neck tube 302 directly contacts and is supported by the sliding member 307, and allows the internal device 102 to slide relative to the sliding member 307 during cold shrinkage deformation.

[0055] In some embodiments, refer to Figure 2 The aforementioned second neck tube 302 is provided in multiple forms, and the multiple second neck tubes 302 are arranged in a sleeve form, that is, the multiple second neck tubes 302 are all configured as hollow tubes extending along the axis O. Correspondingly, the aforementioned second support structure 300 also includes a second auxiliary plate 304. The second extension ends 302b of the multiple second neck tubes 302 are fixed on the second auxiliary plate 304, and the specifications of the outermost second neck tube 302 are adapted to the specifications of the second opening 111.

[0056] In some embodiments, refer to Figure 4The aforementioned second support assembly comprises multiple third support structures 400. Each third support structure 400 is assembled within the support interval 107, with one end connected to the base plate 106 of the saddle portion and the other end connected to the wall of the internal device 102. In some embodiments, each third support structure 400 includes a leg member 401, which is generally configured as a rod-shaped member and has a first support end and a second support end. Specifically, the first support end of the leg member 401 is rotatably assembled onto the base plate 106, and the rotation axis of the first support end ( Figure 4 The middle D line is set horizontally and perpendicular to the axis O. Correspondingly, the second support end of the support leg component 401 is rotatably mounted on the outer wall of the outer container component 101, and the rotation axis of the second support end ( Figure 4 The C-line is set horizontally and perpendicular to the axis O. The third support structure 400 is designed based on the support leg component 401, and the first support assembly is based on the first neck tube 202 and the second neck tube 302. The first neck tube 202 of the first support structure 200 can serve as a base point when the temperature of the contents 102 changes, allowing the contents 102 to freely extend or shorten. At the same time, the first support structure 200 can also withstand axial impact loads and reduce pipeline deformation. The second support structure 300 uses a sliding component 307 made of epoxy fiberglass, which can eliminate the deformation caused by the shrinkage of the contents 102. The good low thermal conductivity of fiberglass itself can also reduce heat loss on the support path of the second neck tube 302.

[0057] In some embodiments, the support leg member 401 has a rod portion 401a and spherical portions 401b disposed at both ends of the rod portion 401a. In this example, the rod portion 401a of the support leg member 401 is made of composite material, and the two ends are connected by metal material. This can not only meet the support strength requirements, but also greatly reduce the heat loss of the third support structure 400, and avoid the problem of cold brittleness of the rod portion under large temperature differences. Correspondingly, the third support structure 400 also includes a first support base 402 and a second support base 403, wherein the first support base 402 is fixed to the base plate portion 106, and the second support base 403 is fixed to the outer wall of the internal device 102, and the first... Both the support base 402 and the second support base 403 are provided with spherical grooves that accommodate the spherical part 401b of the support leg member 401. Based on the rotation of the spherical part 401b, it can adapt to the expansion and contraction of the internal device 102 due to thermal expansion and contraction. At the same time, the insulated container can be pre-tilted at a certain angle during installation so that the support leg member 401 is in a vertical state under normal working conditions, thereby improving structural stability. In some examples, the first support base 402 and the second support base 403 are both composed of seat parts 402a, 403a and flange parts 402b, 403b, and the contact surfaces of the seat parts 402a, 403a and the flange parts 402b, 403b are provided with heat-insulating gaskets.

[0058] In some embodiments, an insulating wrapping layer is provided on the outer wall of the rod portion 401a of the content device 102 and the support member 401. The insulating wrapping layer is made of materials such as aluminum foil and glass fiber paper, wherein the glass fiber paper is closely attached to the outer wall of the rod portion 401a of the content device 102 and the insulating member to reduce heat leakage in the insulating zone 103 and the support zone 107 and heat radiation from the external environment.

[0059] In some embodiments, refer to Figure 1 and 4 A wave-damping device 500 is provided inside the connection between the aforementioned content device 102 and the second support base 403. Specifically, the wave-damping device 500 includes a wave-damping plate 501 and a transition plate 502. The wave-damping plate 501 has a conical structure and a certain number of liquid-passing circular holes 504 are opened in its cross-section. One side of the outer diameter is in the form of an arc transition, which can buffer the shaking impact force. Correspondingly, the aforementioned transition plate 502 is assembled on the wave-damping plate 501. For example, part of the transition plate 502 is connected to the wave-damping plate 501 by fasteners such as bolts, and the remaining transition plates 502 are fixed by a bracket plate 503. The bracket plate 503 is configured as an arc-shaped plate fixed to the inner wall of the content device 102 and is axially spaced from the aforementioned wave-damping plate 501. In some embodiments, a certain number of liquid-passing pipe holes 505 are opened on the bottom end of the transition plate 502.

[0060] The aforementioned outrigger component 401 is made of composite material, which can further reduce heat leakage of the outrigger component 401. In addition, the outer wall of the rod part 401a of the outrigger component 401 is wrapped with heat insulation material, which can reduce heat loss such as radiation from the external environment such as the saddle part. Based on the anti-wave device 500 in the internal device 102, it can meet the inertial load requirements such as braking, turning and sudden start during transportation. It can not only play the role of anti-wave and reduce the sloshing of the internal liquid, but also strengthen the structural strength of the internal device 102.

[0061] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0062] In the description of this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this invention, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, those skilled in the art can combine different embodiments or examples and features of different embodiments or examples described in this invention without contradiction.

[0063] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cryogenic insulating container, characterized in that, include: A container assembly (100) extends along axis O and has a first end and a second end in the axial direction. The container assembly (100) includes a content device (102) and an outer container (101) disposed around the content device (102), and an insulating zone (103) is formed between the outer container (101) and the content device (102). A first support structure (200) is disposed at the first end of the container assembly (100) and constitutes a connection structure between the outer container (101) and the inner device (102); The heat insulation container also includes: A second support structure (300) is disposed at the second end of the container assembly (100) and includes: The second support plate (301) is fixed to the inner wall of the outer container (101); At least one second neck tube (302) extends along axis O and has an axial second connecting end (302a) and a second extending end (302b), the second extending end (302b) passing through the content device (102) and extending into the content device (102), the second connecting end (302a) passing through the second support plate (301) and being spaced apart from the wall of the outer container (101).

2. The cryogenic insulation container according to claim 1, characterized in that: The second support structure (300) further includes a plurality of sliding units (305) assembled at the opening position of the second support plate (301) and arranged in a ring array. Each sliding unit (305) includes: The jacket component (306) is assembled at the opening position of the second support plate (301) and is provided with a groove; The sliding member (307) is fitted into the groove and has a surface that contacts the second neck member (302).

3. A cryogenic insulating container according to claim 1, characterized in that: The first support structure (200) includes: The first support plate (201) is fixed to the inner wall of the outer container (101); At least one first neck tube (202) extends along axis O and has an axial first connecting end (202a) and a first extending end (202b); the first connecting end (202a) is fixed to the first support plate (201), and the first extending end (202b) passes through the content device (102) and extends into the content device (102); The first isolation member (203) is fixed to the inner wall of the content device (102) and located on the periphery of the first neck tube (202).

4. A cryogenic insulation container according to claim 1 or 2, characterized in that: The second neck tube (302) is provided in multiple forms, each of which is a hollow tube, and the diameters of the multiple second neck tubes (302) are all different. The second support structure (300) also includes: The second auxiliary plate (304) has its second extension ends (302b) of a plurality of second neck tubes (302) fixed to the second auxiliary plate (304).

5. A cryogenic insulating container according to claim 1, characterized in that: The outer container also includes a plurality of saddle portions, which are spaced apart along the axial direction, and each saddle portion has: The sidewall portion (104) is formed by extending vertically from the sidewall of the content device (102) and includes two radially symmetrically arranged sidewall units (104a); The base plate (106) is connected to the side wall (104) and together with a single side wall unit (104a) of the side wall (104) defines a support section (107), which is connected to the insulation section (103).

6. A cryogenic insulating container according to claim 5, characterized in that: The insulated container also includes a plurality of third support structures (400), each of which is assembled within the support section (107) and includes a leg member (401) having: The first support end is rotatably mounted on the base plate (106), and the rotation axis of the first support end is set horizontally and perpendicular to the axis O; The second support end is rotatably mounted on the outer wall of the content device (102). The rotation axis of the second support end is set horizontally and perpendicular to axis O.

7. A cryogenic insulating container according to claim 6, characterized in that: The support leg member (401) has a rod body (401a) and spherical parts (401b) disposed at both ends of the rod body (401a). The third support structure (400) further includes: The first support (402) is assembled on the base plate (106); The second support (403) is assembled on the outer wall of the content device (102), and both the first support (402) and the second support (403) are provided with spherical grooves to accommodate the spherical part (401b).

8. A cryogenic insulating container according to claim 7, characterized in that: The first support (402) and the second support (403) each have a seat body and a flange, and an insulating gasket is provided at the contact position of the seat body and the flange.

9. A cryogenic insulating container according to claim 7, characterized in that: The insulated container further includes a wave-damping device (500) disposed at the connection position between the internal device (102) and the second support (403), the wave-damping device comprising: The wave-damping plate (501) is fixed to the inner wall of the internal device (102) and is configured as a conical structure. The wave-damping plate (501) is provided with a plurality of liquid-passing circular holes (504).

10. A cryogenic insulating container according to claim 9, characterized in that: The wave-damping device (500) also includes: A transition plate (502) is assembled on the wave-breaking plate (501), and the transition plate (502) is provided with a plurality of liquid passage holes (505).

11. A cryogenic insulating container according to claim 10, characterized in that: Part of the transition plate (502) is fixed to the wave-damping plate (501) by bolts.

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