Cryogenic liquid storage and transportation containers

Abstract

This invention relates to a cryogenic liquid storage and transportation container, comprising a shell, a medium container, a refrigerant container, and a cold shield component. The medium container is disposed within the shell and is used to store the cryogenic liquid. The refrigerant container is disposed within the shell and located at the end of the medium container, and includes a first accommodating cavity and a second accommodating cavity that are connected to each other. The first accommodating cavity is located above the second accommodating cavity, and the first and second accommodating cavities are respectively used to store a refrigerant, the boiling point of which is higher than that of the cryogenic liquid. The cold shield component is disposed within the shell and surrounds the outer periphery of the medium container, and includes liquid cooling pipes. The liquid cooling pipes extend from the lower part of the first accommodating cavity, are arranged around the outer periphery of the medium container, and lead to the upper part of the first accommodating cavity or to the outside of the first accommodating cavity and above it. This cryogenic liquid storage and transportation container allows the cold source to maintain a high liquid level on the cryogenic barrier at all times and ensures that the liquid cooling pipes are filled with refrigerant, thus maintaining the cryogenic barrier at a low temperature for a longer period of time.

Description

Technical Field

[0001] This invention relates to the field of cryogenic container technology, and in particular to an ultra-low temperature liquid storage and transportation container. Background Technology

[0002] With the advancement of science and technology, cryogenic liquids such as liquid nitrogen, liquid oxygen, and liquid argon are being used more and more frequently in industry, medicine, aerospace, and daily life. Equipment for storing these cryogenic liquids typically consists of an inner container, an outer shell, a vacuum jacket, and a piping system. The insulation performance of cryogenic containers is closely related to the vacuum level of the jacket and the insulation performance of the insulation material itself. For cryogenic liquids below -160℃ and above -196℃, the high-vacuum multilayer insulation or vacuum powder insulation methods used in existing cryogenic liquid storage containers can generally meet their insulation performance requirements. However, for ultra-low temperature liquids such as liquid hydrogen and liquid helium, which have low boiling points and low latent heat of vaporization, the insulation performance of the above two insulation methods is often unsatisfactory because the daily evaporation rate of ultra-low temperature liquids is very high, and the liquid storage time is very short.

[0003] Currently, cryogenic liquids are typically stored in a liquid storage container with a liquid nitrogen cooling shield installed in a vacuum interlayer. The liquid nitrogen cooling shield forms a cryogenic barrier around the inner container, preventing external heat from penetrating it. This reduces the loss of cryogenic liquid within the container, decreases evaporation, and enables long-term storage of cryogenic liquids under low pressure.

[0004] However, with the extension of international trade chains and the demands of maritime shipping cycles, the non-destructive storage time for cryogenic liquid storage and transportation containers has increased from no more than 30 days to more than 45 days. Therefore, how to extend the non-destructive storage time of storage and transportation containers has become an urgent problem to be solved. Summary of the Invention

[0005] One objective of this invention is to overcome the shortcomings of existing technologies and provide a cryogenic liquid storage and transportation container. To solve the above-mentioned technical problems, this invention adopts the following technical solution:

[0006] A cryogenic liquid storage and transportation container, comprising:

[0007] shell;

[0008] A media container, housed within an outer shell, is used to store cryogenic liquids;

[0009] A refrigerant container is disposed inside an outer shell and located at the end of a medium container. The refrigerant container includes a first accommodating cavity and a second accommodating cavity that are connected to each other. The first accommodating cavity is located above the second accommodating cavity. The first accommodating cavity and the second accommodating cavity are respectively used to store a refrigerant substance, the boiling point of which is higher than that of an ultra-low temperature liquid.

[0010] A cooling screen component is disposed inside the housing and surrounding the outer periphery of the medium container. The cooling screen component includes liquid cooling pipes, which are led out from the lower part of the first accommodating cavity, arranged around the outer periphery of the medium container, and led to the upper part of the first accommodating cavity or to the outside of the first accommodating cavity and higher than the first accommodating cavity.

[0011] In one embodiment, the cryogenic liquid storage and transportation container further includes a connecting pipe, one end of which is connected to the first accommodating cavity and is higher than the outlet of the liquid cooling pipeline, and the other end of which is connected to the lower part of the second accommodating cavity.

[0012] In one embodiment, the cryogenic liquid storage and transportation container further includes a liquid level control valve, which is disposed on a connecting pipe and is used to control the opening and closing of the connecting pipe according to the liquid level in the first accommodating cavity.

[0013] In one embodiment, the outer casing is a horizontally arranged tank-like structure;

[0014] The refrigerant container includes a first tank body, and a partition is provided inside the first tank body. The partition divides the internal space of the first tank body into upper and lower parts. The part located on the partition forms a first receiving cavity, and the part located below the partition forms a second receiving cavity.

[0015] In one embodiment, a connecting tube is disposed through the partition, with its lower end extending into the bottom of the second accommodating cavity and its upper end extending into the upper part of the first accommodating cavity.

[0016] In one embodiment, the outer casing is a horizontally arranged tank-like structure;

[0017] The refrigerant container includes a second tank and a third tank, which are arranged vertically inside the outer shell. The second tank forms a first accommodating cavity, and the third tank forms a second accommodating cavity. The two ends of the connecting pipe are connected to the upper part of the second tank and the bottom of the third tank, respectively.

[0018] In one embodiment, the liquid cooling pipe is led out from the lower part of the first accommodating cavity, arranged around the outer periphery of the medium container, and led to the upper part of the first accommodating cavity;

[0019] The cold screen components also include:

[0020] The first air-cooling pipeline is led out from the upper part of the first accommodating cavity, arranged around the outer periphery of the medium container and led out to the outside of the outer shell.

[0021] The second air-cooling pipeline is led out from the upper part of the second accommodating cavity, arranged around the outer periphery of the medium container, and led out to the outside of the outer shell.

[0022] In one embodiment, a first pressure relief device is provided on the first air-cooling pipeline, and a second pressure relief device is provided on the second air-cooling pipeline. The set pressure of the first pressure relief device is less than the set pressure of the second pressure relief device.

[0023] In one embodiment, the liquid cooling pipe is led out from the lower part of the first accommodating cavity, arranged around the outer periphery of the medium container, and led to the outside of the first accommodating cavity and above the first accommodating cavity;

[0024] The cold screen components also include:

[0025] A gas-liquid separator is installed inside the outer shell at a position above the outside of the first accommodating cavity. One end of the liquid cooling pipeline is connected to the lower part of the first accommodating cavity, and the other end is connected to the inlet end of the gas-liquid separator.

[0026] The third air-cooled pipeline is led out from the outlet end of the gas-liquid separator, arranged around the outer periphery of the medium container, and led out to the outside of the shell.

[0027] In one embodiment, the cold screen component further includes a cold screen cover, which covers the outer periphery of the medium container and matches the shape of the medium container.

[0028] As can be seen from the above technical solution, the present invention has at least the following advantages and positive effects:

[0029] In this invention, a refrigerant container is provided at the end of the medium container, and the refrigerant container includes a first accommodating cavity and a second accommodating cavity arranged vertically, the first accommodating cavity and the second accommodating cavity being used to store the refrigerant. By providing a liquid cooling pipeline connecting to the lower part of the first accommodating cavity and surrounding the outer periphery of the medium container, a low-temperature barrier is formed on the outer periphery of the medium container, preventing external heat from entering the medium container, thereby reducing the loss of the cryogenic liquid in the medium container and reducing the evaporation of the cryogenic liquid.

[0030] Because the first cavity is located at a higher position, and the second cavity is connected to the first cavity and can supply liquid to it, the first cavity always contains a cold medium. Therefore, the cold source can maintain a high liquid level on the low-temperature barrier, keeping the barrier at a low temperature for a longer period, making fuller use of the cold energy for insulation, and improving the utilization efficiency of the cold medium.

[0031] Since the first containment chamber always stores a refrigerant, and the liquid cooling pipe is led out from the lower part of the first containment chamber, it is possible to ensure that the liquid cooling pipe is always full of refrigerant while ensuring a high liquid level in the cold source. This ensures that the low temperature barrier maintains a low temperature state, which helps to extend the service life of the cryogenic liquid storage and transportation container and reduce the liquid loss during long-term storage of cryogenic liquid. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a cryogenic liquid storage and transportation container according to an embodiment of the present invention.

[0033] Figure 2 This is a schematic diagram of the structure of a cryogenic liquid storage and transportation container according to another embodiment of the present invention.

[0034] The annotations in the attached figures are explained as follows:

[0035] 100 - Outer shell;

[0036] 200 - Media container;

[0037] 300-Refrigerant container;

[0038] 310 - First accommodating cavity; 311 - Liquid level sensor; 320 - Second accommodating cavity;

[0039] 330 - First tank body; 331 - Baffle plate;

[0040] 340 - Second tank; 350 - Third tank; 360 - Connecting pipe; 361 - Liquid level control valve;

[0041] 400 - Cold screen components;

[0042] 410 - Liquid cooling pipeline; 420 - First air cooling pipeline; 421 - First pressure relief device; 430 - Second air cooling pipeline; 431 - Second pressure relief device;

[0043] 430 - Gas-liquid separator; 450 - Cold shield cover. Detailed Implementation

[0044] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0045] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back) are merely for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0046] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] The cryogenic liquid storage and transportation container proposed in this invention is illustrated using a container for storing and transporting cryogenic liquids with low boiling points and low latent heat of vaporization, such as liquid hydrogen and liquid helium. Those skilled in the art will readily understand that various modifications, additions, substitutions, deletions, or other changes can be made to the specific embodiments described below in order to apply the design of this cryogenic liquid storage and transportation container to the design of containers for storing and transporting other types of cryogenic liquefied gases or other cryogenic liquids. These changes are still within the scope of the principles of the cryogenic liquid storage and transportation container proposed in this invention.

[0048] Please see Figure 1 and Figure 2 As shown, the cryogenic liquid storage and transportation container of this embodiment includes a shell 100, a medium container 200, a refrigerant container 300, and a cold shield component 400. The medium container 200 is disposed within the shell 100 and is used to store the cryogenic liquid. The refrigerant container 300 is disposed within the shell 100 and located at the end of the medium container 200. The refrigerant container 300 includes a first receiving cavity 310 and a second receiving cavity 320 that are connected to each other, with the first receiving cavity 310 located above the second receiving cavity 320. The first receiving cavity 310 and the second receiving cavity 320 are respectively used to store a refrigerant medium, the boiling point of which is higher than that of the cryogenic liquid.

[0049] The cooling shield component 400 is disposed inside the housing 100 and surrounds the outer periphery of the medium container 200. The cooling shield component 400 includes a liquid cooling pipe 410, which extends from the lower part of the first accommodating cavity 310, is arranged around the outer periphery of the medium container 200, and leads to the upper part of the first accommodating cavity 310 or to the outside of the first accommodating cavity 310 and is higher than the first accommodating cavity 310.

[0050] like Figure 1 As shown, the outer shell 100 has a horizontally arranged tank-like structure. For example, the outer shell 100 may be designed with reference to existing multi-layered cryogenic storage tanks. For instance, the outer shell 100 may include a cylindrical body and two end caps disposed at both ends of the cylindrical body.

[0051] like Figure 1 As shown, the medium container 200 is disposed within the outer shell 100 and is used to store cryogenic liquid. In this embodiment of the application, liquid helium is used as an example of the cryogenic liquid.

[0052] In one example, such as Figure 1As shown, the medium container 200 has a horizontally arranged tank-like structure. The medium container 200 can be designed with reference to the inner liner of existing multi-layered cryogenic storage tanks. For example, the medium container 200 may include a cylindrical body and two end caps disposed at both ends of the cylindrical body. Furthermore, the medium container 200 and the outer shell 100 are preferably coaxially arranged.

[0053] In the embodiments of this application, the medium container 200 is not located at the center of the outer casing 100 in the axial direction. That is, one end of the medium container 200 is adjacent to one end of the outer casing 100 opposite to it, while there is a certain gap between the other end of the medium container 200 and the end of the outer casing 100 opposite to it. This gap can be used to install the refrigerant container 300, which will be described in detail in the following content concerning the refrigerant container 300.

[0054] See Figure 1 As shown in the embodiment of this application, the refrigerant container 300 is disposed within the outer casing 100 and located at the end of the medium container 200. It can be understood that the refrigerant container 300 can be arranged at either end of the medium container 200. Alternatively, refrigerant containers 300 can be provided at both ends of the medium container 200.

[0055] The refrigerant container 300 serves as a cold source, storing the refrigerant medium. The boiling point of the refrigerant medium is higher than that of cryogenic liquids. In this embodiment, liquid nitrogen is used as an example of the refrigerant medium.

[0056] like Figure 1 As shown in the embodiments of this application, the refrigerant container 300 includes a first accommodating cavity 310 and a second accommodating cavity 320 that are connected to each other, with the first accommodating cavity 310 located above the second accommodating cavity 320. The first accommodating cavity 310 and the second accommodating cavity 320 are respectively used to store refrigerant.

[0057] like Figure 1 As shown, in one embodiment, the cryogenic liquid storage and transportation container further includes a connecting pipe 360, one end of which is connected to the first accommodating cavity 310 and is higher than the outlet of the liquid cooling pipeline 410. The end of the connecting pipe 360 ​​connected to the first accommodating cavity 310 is preferably located in the upper region of the first accommodating cavity 310. For example, the end of the connecting pipe 360 ​​connected to the first accommodating cavity 310 is at least higher than the outlet of the liquid cooling pipeline 410. This helps maintain a higher liquid level within the first accommodating cavity 310.

[0058] like Figure 1As shown, the other end of the connecting pipe 360 ​​is connected to the lower part of the second accommodating cavity 320. The end of the connecting pipe 360 ​​that connects to the second accommodating cavity 320 may be located in the lower region of the second accommodating cavity 320. For example, the connecting pipe 360 ​​may connect to the bottom of the second accommodating cavity 320, thereby facilitating the supply of as much liquid as possible from the second accommodating cavity 320 to the first accommodating cavity 310.

[0059] In this application, by providing a connecting pipe 360, the first accommodating cavity 310 and the second accommodating cavity 320 can be connected, so that the second accommodating cavity 320 can supply liquid to the first accommodating cavity 310, thereby ensuring that the first accommodating cavity 310 always stores a cold medium.

[0060] See Figure 1 In one embodiment, the cryogenic liquid storage and transportation container further includes a level control valve 361, which is disposed on the connecting pipe 360. The level control valve 361 is used to control the opening and closing of the connecting pipe 360 ​​according to the liquid level in the first accommodating cavity 310.

[0061] For example, the level control valve 361 can be an automatic float valve, which can automatically open or close the connecting pipe 360 ​​according to the liquid level in the first accommodating cavity 310. The automatic float valve can be located at the end of the connecting pipe 360 ​​that connects to the first accommodating cavity 310. When the liquid level in the first accommodating cavity 310 is lower than this end, the automatic float valve can open the connecting pipe 360, allowing the cooling medium in the second accommodating cavity 320 to enter the first accommodating cavity 310.

[0062] In other embodiments, the level control valve 361 may also be a shut-off valve, a non-automatic ball valve, etc. Further, the cryogenic liquid storage and transportation container may include a level sensor 311, which may be disposed within the first accommodating cavity 310 to detect the liquid level within the first accommodating cavity 310. When the level sensor 311 detects a low liquid level within the first accommodating cavity 310, the level control valve 361 can respond to the level sensor 311 by opening the connecting pipe 360.

[0063] The liquid level sensor 311 can be disposed at the upper part of the first accommodating cavity 310. Preferably, the liquid level sensor 312 can be disposed at a position higher than the end of the first connecting pipe 332 that communicates with the first accommodating cavity 310.

[0064] In this embodiment, by setting a liquid level control valve 361, the second accommodating cavity 320 can supply liquid to the first accommodating cavity 310 as needed, so as to ensure that there is always a cold medium in the first accommodating cavity 310.

[0065] In other embodiments, the level control valve 361 can be an automatic float valve. A level sensor 311 can also be installed to detect the liquid level in the first accommodating cavity 310, indicating to the operator whether the automatic float valve is functioning correctly, thus helping to ensure that the liquid level in the first accommodating cavity 310 is always maintained at a high position. Alternatively, an additional control valve can be added at the end of the connecting pipe 360 ​​that connects to the first accommodating cavity 310, responding to the level sensor 311. This allows for dual control of the liquid level in the first accommodating cavity 310 through the automatic float valve, the control valve, and the level sensor 311.

[0066] It should be noted that the first accommodating cavity 310 and the second accommodating cavity 320 of the refrigerant container 300 can be formed by dividing a single container into two, or they can be formed by two independent containers.

[0067] See Figure 1 In one embodiment, the refrigerant container 300 includes a first tank 330. The first tank 330 may be arranged coaxially with the axial centerline of the outer casing 100.

[0068] For example, the first tank 330 may include a cylindrical body and end caps located at both ends of the cylindrical body. The two end caps of the first tank 330 may be an inner end cap and an outer end cap, respectively. The inner end cap is located near the end of the medium container 200, and its shape may match the end shape of the medium container 200. The outer end cap is located away from the medium container 200, and it may also be designed as a convex arc shape. Thus, the cross-section of the first tank 330 is approximately a "C" shape or a ")" shape. This reduces the installation space required for the first tank 330, which is beneficial for reducing the size and space occupied by the equipment. In this embodiment, the space in the first tank 330 for storing the cold medium is formed by the cylindrical body, the inner end cap, and the outer end cap of the first tank 330.

[0069] There may be a certain gap between the inner end cap and the outer wall of the end of the medium container 200, so as to form a vacuum space between them to avoid mutual interference between the refrigerant container 300 and the low temperature medium in the medium container 200.

[0070] In other embodiments, depending on the different end cap structures of the outer shell 100 or the medium container 200, or their different relative positions, the first tank 330 may also be selected with other structures, and is not limited to this embodiment.

[0071] like Figure 1 As shown, in one embodiment, a partition 331 is provided inside the first tank 330, which divides the internal space of the first tank 330 into upper and lower parts. The part located above the partition 331 forms a first receiving cavity 310, and the part located below the partition 331 forms a second receiving cavity 320.

[0072] In this embodiment, the first accommodating cavity 310 and the second accommodating cavity 320 of the refrigerant container 300 are formed by dividing a single container into two. That is, the partition 331 divides the internal space of the first tank 330 into two independent accommodating spaces to store the refrigerant separately.

[0073] like Figure 1 As shown, in one embodiment, a connecting pipe 360 ​​is disposed through the partition 331. The lower end of the connecting pipe 360 ​​extends into the bottom of the second accommodating cavity 320, and the upper end of the connecting pipe 360 ​​extends into the upper part of the first accommodating cavity 310. In this embodiment, the connecting pipe 360 ​​is disposed through the partition 331, and the structure of the connecting pipe 360 ​​is simpler. It does not occupy the external space of the refrigerant container 300, thus facilitating the arrangement of other components inside the outer casing 100.

[0074] In this embodiment, the lower end of the connecting pipe 360 ​​extends into the bottom of the second accommodating cavity 320, which helps to supply as much liquid as possible in the second accommodating cavity 320 to the first accommodating cavity 310. The upper end of the connecting pipe 360 ​​extends into the upper part of the first accommodating cavity 310, which helps to maintain a high liquid level in the first accommodating cavity 310.

[0075] In other embodiments, the connecting pipe 360 ​​may not penetrate the partition 331. The connecting pipe 360 ​​may be disposed outside the first tank 330, and its two ends may be connected to the upper and lower spaces of the partition 331, respectively.

[0076] See Figure 2 In another embodiment of this application, the refrigerant container 300 includes a second tank 340 and a third tank 350, which are vertically distributed within the outer casing 100. The second tank 340 forms a first accommodating cavity 310, and the third tank 350 forms a second accommodating cavity 320. In this embodiment, the first accommodating cavity 310 and the second accommodating cavity 320 of the refrigerant container 300 are each composed of two independent containers.

[0077] like Figure 2 As shown, the two ends of the connecting pipe 360 ​​are connected to the upper part of the second tank 340 and the bottom of the third tank 350, respectively. This helps to maintain a high liquid level in the first accommodating cavity 310 and allows the liquid in the second accommodating cavity 320 to be supplied to the first accommodating cavity 310 as much as possible, thus ensuring a high liquid level in the first accommodating cavity 310.

[0078] In the embodiments of this application, the refrigerant container 300 includes a first accommodating cavity 310 and a second accommodating cavity 320 arranged vertically. Since the first accommodating cavity 310, which is at a higher position, always contains refrigerant, a high liquid level in the cold source is ensured. Therefore, the low-temperature barrier can be maintained at a low temperature for a longer period of time, and the cold energy of the cold source can be fully utilized for insulation, thereby improving the utilization efficiency of the refrigerant.

[0079] It should be noted that, in the embodiments of this application, the refrigerant container 300 includes a first accommodating cavity 310 and a second accommodating cavity 320. However, this application is not limited to this; the number of first accommodating cavities 310 may also be two or more, and the number of second accommodating cavities 320 may also be two or more, depending on the specific circumstances.

[0080] See Figure 1 and Figure 2 As shown in the embodiments of this application, the cold shield component 400 is disposed within the outer shell 100 and surrounds the outer periphery of the medium container 200. The cold shield component 400 is used to form a low-temperature barrier on the outer periphery of the medium container 200, preventing external heat from entering the medium container 200. This reduces the loss of cryogenic liquid inside the medium container 200 and reduces the evaporation of the cryogenic liquid.

[0081] like Figure 1 As shown, in one embodiment, the cold screen component 400 includes a liquid cooling pipe 410, which extends from the lower part of the first accommodating cavity 310, is arranged around the outer periphery of the medium container 200, and leads to the upper part of the first accommodating cavity 310. Specifically, with Figure 1 As shown in the diagram, the liquid cooling pipe 410 is led out from the lower part of the first accommodating cavity 310, and extends along the lower right side of the medium container 200 to directly below the medium container 200, then along the left end of the medium container 200 and directly above the medium container 200, and finally returns to the upper part of the first accommodating cavity 310.

[0082] In this embodiment, by providing a liquid cooling pipe 410, a low-temperature barrier can be formed around the medium container 200, reducing the loss of cryogenic liquid inside the medium container 200. Furthermore, the end of the liquid cooling pipe 410 is connected to the first accommodating cavity 310, which allows the vaporized cold medium in the liquid cooling pipe 410 to be liquefied again, reducing the loss of cold medium.

[0083] Because the liquid cooling pipe 410 draws out the refrigerant from the first accommodating cavity 310, the liquid level in the first accommodating cavity 310 decreases, and its internal pressure also decreases relatively. Therefore, when the liquid level in the first accommodating cavity 310 drops to a certain level, the refrigerant in the second accommodating cavity 320 can flow into the first accommodating cavity 310 by gravity through the connecting pipe 360, so as to ensure that the first accommodating cavity 310 always stores refrigerant and ensures a high liquid level of the cold source.

[0084] Since the liquid cooling pipe 410 draws out the cold medium from the lower part of the first accommodating cavity 310, under the premise of ensuring a high liquid level of the cold source, it can ensure that the liquid cooling pipe 410 is always full of cold medium, ensuring that the low temperature barrier maintains a low temperature state, which is conducive to extending the service life of the cryogenic liquid storage and transportation container and reducing the liquid volume loss of cryogenic liquid during long-term storage.

[0085] See Figure 1 The cold shield component 400 also includes a first air-cooling pipe 420, which extends from the upper part of the first accommodating cavity 310, is arranged around the outer periphery of the medium container 200, and extends to the outside of the outer shell 100. By setting up the first air-cooling pipe 420, the vaporized cold medium in the first accommodating cavity 310 can be discharged to the outside, improving the safety of the equipment. At the same time, the low-temperature gas in the first air-cooling pipe 420 can form a low-temperature barrier around the outer periphery of the medium container 200, further reducing the loss of the cryogenic liquid in the medium container 200.

[0086] See Figure 1 The cold shield component 400 also includes a second air-cooling pipe 430, which extends from the upper part of the second accommodating cavity 320, is arranged around the outer periphery of the medium container 200, and leads to the outside of the outer shell 100. By providing the second air-cooling pipe 430, the vaporized cold medium in the second accommodating cavity 320 can be discharged to the outside, improving the safety of the equipment. At the same time, the low-temperature gas in the second air-cooling pipe 430 forms a low-temperature barrier around the outer periphery of the medium container 200, further reducing the loss of the cryogenic liquid in the medium container 200.

[0087] See Figure 1 In one embodiment, a first pressure relief device 421 is provided on the first air-cooling pipeline 420, and a second pressure relief device 431 is provided on the second air-cooling pipeline 430. By providing the first pressure relief device 421, air can be automatically released to the outside when the pressure in the first accommodating cavity 310 is too high, ensuring equipment safety. By providing the second pressure relief device 431, air can be automatically released to the outside when the pressure in the second accommodating cavity 320 is too high, ensuring equipment safety.

[0088] Preferably, the set pressure of the first pressure relief device 421 is lower than the set pressure of the second pressure relief device 431. Specifically, when the first pressure relief device 421 releases pressure, the pressure in the first accommodating cavity 310 will be lower than the pressure in the second accommodating cavity 320 when the second pressure relief device 431 releases pressure. By making the set pressure of the first pressure relief device 421 lower than the set pressure of the second pressure relief device 431, the pressure in the second accommodating cavity 320 can always be greater than the pressure in the first accommodating cavity 310 during equipment operation. This facilitates the entry of the refrigerant from the second accommodating cavity 320 into the first accommodating cavity 310, ensuring that the first accommodating cavity 310 always contains refrigerant and that the liquid cooling pipeline 410 is filled with refrigerant.

[0089] It is understood that in other embodiments, the first air-cooling pipe 420 may also be directly connected to the outside. The second air-cooling pipe 430 may also be directly connected to the outside.

[0090] See Figure 2 In another embodiment of this application, the cold screen component 400 includes a liquid cooling pipe 410, which is led out from the lower part of the first accommodating cavity 310, arranged around the outer periphery of the medium container 200 and led to the outside of the first accommodating cavity 310 and above the first accommodating cavity 310.

[0091] In this embodiment, by providing the liquid cooling pipeline 410, a low-temperature barrier can be formed around the medium container 200, reducing the loss of cryogenic liquid within the medium container 200. Furthermore, since the liquid cooling pipeline 410 draws the cryogenic medium from the first accommodating cavity 310, the pressure within the first accommodating cavity 310 will be relatively reduced. This facilitates the flow of the cryogenic medium from the second accommodating cavity 320 into the first accommodating cavity 310 via the connecting pipe 360, ensuring that the first accommodating cavity 310 is always filled with cryogenic medium and that the liquid cooling pipeline 410 is completely filled with cryogenic medium.

[0092] like Figure 2 As shown, in one embodiment, the cooling screen component 400 further includes a gas-liquid separator 430, which is disposed inside the housing 100 at an upper position corresponding to the outside of the first accommodating cavity 310. One end of the liquid cooling pipe 410 is connected to the lower part of the first accommodating cavity 310, and the other end is connected to the inlet end of the gas-liquid separator 430.

[0093] Specifically, with Figure 2 As shown in the diagram, the liquid cooling pipe 410 is led out from the lower part of the first accommodating cavity 310, and extends along the lower right upper part of the medium container 200 to directly below the medium container 200, and then extends along the left end of the medium container 200 and directly above the medium container 200, finally leading to the gas-liquid separator 430 located on the upper right side outside the medium container 200, that is, above the outside of the first accommodating cavity 310.

[0094] like Figure 2 As shown, the outlet end of the gas-liquid separator 430 leads to the outside of the housing 100. In this embodiment, by setting the gas-liquid separator 430, the liquid refrigerant can be stopped in the liquid cooling pipeline 410, ensuring that the liquid cooling pipeline 410 is always full of refrigerant. At the same time, the gas-liquid separator 430 can separate and discharge the vaporized refrigerant in the liquid cooling pipeline 410 to the outside, thereby improving equipment safety.

[0095] It is understood that in other embodiments, the outlet end of the gas-liquid separator 430 may also be connected to a gas-cooled pipeline, which may be arranged around the outer periphery of the medium container 200 and led out to the outside of the outer shell 100. Thus, the vaporized cold medium in the gas-cooled pipeline can form a low-temperature barrier around the outer periphery of the medium container 200, further reducing the loss of cryogenic liquid in the medium container 200.

[0096] like Figure 2 As shown, for example, a gas pipeline may be connected to the upper part of the second tank 340, which connects to the outside of the outer casing 100. A pressure relief device may be installed on the gas pipeline. A gas pipeline may be connected to the upper part of the third tank 350, which connects to the outside of the outer casing 100. A pressure relief device may be installed on the gas pipeline.

[0097] The pressure relief device on the gas pipeline of the third tank 350 is set at a higher pressure than the pressure relief device on the gas pipeline of the second tank 340. This ensures that the pressure in the second accommodating cavity 320 is always higher than the pressure in the first accommodating cavity 310 during equipment operation. This facilitates the entry of the refrigerant from the second accommodating cavity 320 into the first accommodating cavity 310, ensuring that the first accommodating cavity 310 always contains refrigerant and that the liquid cooling pipeline 410 is filled with refrigerant.

[0098] It is understood that in other embodiments, the gas pipeline of the second tank 340 may first be arranged around the outer periphery of the medium container 200 and then led out to the outside of the outer shell 100, thereby forming a low-temperature barrier around the outer periphery of the medium container. The gas pipeline of the third tank 350 may also first be arranged around the outer periphery of the medium container 200 and then led out to the outside of the outer shell 100, thereby forming a low-temperature barrier around the outer periphery of the medium container.

[0099] In this embodiment, the aforementioned liquid-cooled piping 410 and each air-cooled piping can be arranged in a meandering or serpentine manner. This greatly increases the piping length and improves the insulation and cold-keeping effect. Furthermore, the piping can be arranged in bundles or parallel configurations along the same or similar paths, or they can be arranged along different paths.

[0100] See Figure 1In some embodiments, the cooling shield component 400 further includes a cooling shield cover 450, which covers the outer periphery of the medium container 200. The cooling shield cover 450 may be shaped to match the medium container 200. For example, the cooling shield cover 450 may include a cylindrical body and a cap connected to one end of the cylindrical body. The other end of the cylindrical body may cover the refrigerant container 300 together, or it may only cover the medium container 200.

[0101] The material of the cooling shield 450 can be aluminum or aluminum alloy, which have high thermal conductivity. By setting the cooling shield 450, the wall temperature of the medium container 200 can be effectively reduced, thus reducing radiant heat.

[0102] The cold shield component 400 of this application embodiment can form multiple layers of low-temperature barriers around the outer periphery of the medium container 200. For example, the cold shield component 400 may include at least one cold shield cover 450, one layer of liquid cooling pipe 410, and one or two layers of air cooling pipe. Therefore, the cold shield component 400 can effectively isolate the medium container 200 from external heat, reduce the loss of cryogenic liquid inside the medium container 200, reduce the evaporation of cryogenic liquid, and realize long-term storage of cryogenic liquid under low pressure.

[0103] It should be noted that, based on the aforementioned multi-layered cryogenic barriers, a vacuum environment exists between the outer shell 100 and the cold shield 450; a vacuum environment exists between the outer shell 100 and the refrigerant container 300; a vacuum environment exists between the cold shield 450 and the medium container 200; and a vacuum environment exists between the refrigerant container 300 and the medium container 200. This further ensures the insulation effect between each tank (barrier) layer and reduces the evaporation rate of the cryogenic liquid. Furthermore, insulating material can be filled in the vacuum interlayer between the medium container 200 and the refrigerant container 300 and the outer shell 100, thereby reducing the temperature difference between the medium container 200 and the outside environment and further ensuring the insulation effect of the cryogenic liquid storage and transportation container.

[0104] The above embodiments are merely illustrative examples of structures. The structures in each embodiment are not fixed combinations. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used.

[0105] Although the invention has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since the invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A cryogenic liquid storage and transportation container, characterized in that, include: shell; A medium container, disposed within the outer shell, is used to store cryogenic liquids; A refrigerant container is disposed inside the outer shell and located at the end of the medium container. The refrigerant container includes a first accommodating cavity and a second accommodating cavity that are connected to each other. The first accommodating cavity is located above the second accommodating cavity. The first accommodating cavity and the second accommodating cavity are respectively used to store a refrigerant substance. The boiling point of the refrigerant substance is higher than that of the cryogenic liquid. A cooling screen component is disposed inside the housing and surrounding the outer periphery of the medium container. The cooling screen component includes liquid cooling pipes. The liquid cooling pipes are led out from the lower part of the first accommodating cavity, arranged around the outer periphery of the medium container, and led to the upper part of the first accommodating cavity or to the outside of the first accommodating cavity and higher than the first accommodating cavity.

2. The cryogenic liquid storage and transportation container according to claim 1, characterized in that, It also includes a connecting pipe, one end of which is connected to the first accommodating cavity and is higher than the outlet of the liquid cooling pipeline, and the other end of which is connected to the lower part of the second accommodating cavity.

3. The cryogenic liquid storage and transportation container according to claim 2, characterized in that, It also includes a liquid level control valve, which is disposed on the connecting pipe and is used to control the opening and closing of the connecting pipe according to the liquid level in the first accommodating cavity.

4. The cryogenic liquid storage and transportation container according to claim 2 or 3, characterized in that, The outer shell has a horizontally arranged tank-like structure; The refrigerant container includes a first tank body, and a partition is provided inside the first tank body. The partition divides the internal space of the first tank body into upper and lower parts. The part located on the partition forms the first receiving cavity, and the part located below the partition forms the second receiving cavity.

5. The cryogenic liquid storage and transportation container according to claim 4, characterized in that, The connecting pipe is disposed through the partition, with its lower end extending into the bottom of the second accommodating cavity and its upper end extending into the upper part of the first accommodating cavity.

6. The cryogenic liquid storage and transportation container according to claim 2 or 3, characterized in that, The outer shell has a horizontally arranged tank-like structure; The refrigerant container includes a second tank and a third tank, which are arranged vertically within the outer shell. The second tank forms the first accommodating cavity, and the third tank forms the second accommodating cavity. The two ends of the connecting pipe are respectively connected to the upper part of the second tank and the bottom of the third tank.

7. The cryogenic liquid storage and transportation container according to claim 1, characterized in that, The liquid cooling pipe is led out from the lower part of the first accommodating cavity, arranged around the outer periphery of the medium container, and led to the upper part of the first accommodating cavity; The cold screen component also includes: The first air-cooling pipeline is led out from the upper part of the first accommodating cavity, arranged around the outer periphery of the medium container and led out to the outside of the outer shell; The second air-cooling pipeline extends from the upper part of the second accommodating cavity, is arranged around the outer periphery of the medium container, and extends to the outside of the outer shell.

8. The cryogenic liquid storage and transportation container according to claim 7, characterized in that, A first pressure relief device is provided on the first air-cooling pipeline, and a second pressure relief device is provided on the second air-cooling pipeline. The set pressure of the first pressure relief device is less than the set pressure of the second pressure relief device.

9. The cryogenic liquid storage and transportation container according to claim 1, characterized in that, The liquid cooling pipe is led out from the lower part of the first accommodating cavity, arranged around the outer periphery of the medium container, and led to the outside of the first accommodating cavity and above the first accommodating cavity; The cold shield component also includes a gas-liquid separator, which is disposed inside the outer casing at an upper position corresponding to the outside of the first accommodating cavity. One end of the liquid cooling pipeline is connected to the lower part of the first accommodating cavity, and the other end is connected to the inlet end of the gas-liquid separator. The outlet end of the gas-liquid separator leads to the outside of the outer casing.

10. The cryogenic liquid storage and transportation container according to claim 1, characterized in that, The cold screen component also includes a cold screen cover, which is disposed around the outer periphery of the medium container and the shape of the cold screen cover matches that of the medium container.

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