A large-capacity zero-evaporation storage liquid helium tank

Abstract

This invention relates to the field of cryogenic tank containers / tank containers, specifically to a large-capacity, zero-evaporation liquid helium tank container / tank container, comprising: an inner container of the liquid helium tank, a cooling coil for the inner container, liquid helium inlet and outlet pipes, composite multi-layer insulation material, an inner copper shield, a flash vapor transfer pipe, insulation support, an outer copper shield, an outer container of the liquid helium tank, a steel frame for the liquid helium tank, a liquid helium inlet transfer pipeline, a cooling medium inner container, a cooling coil for the inner container, composite multi-layer insulation material II, inner copper shield II, insulation support II, outer copper shield II, a cryogenic cold head, a cryogenic refrigerator, and a one-way liquid filling control valve. This invention can address the rapid increase in internal pressure that easily occurs during long-term pressurized storage of liquid helium and long-distance transportation of liquid helium, achieving long-term zero-evaporation storage.

Description

Technical Field

[0001] This invention relates to the field of cryogenic tank / tank container technology, and more specifically, to a large-capacity zero-evaporation liquid helium storage tank. Background Technology

[0002] Helium, a non-renewable and scarce strategic resource, plays a crucial role in various fields. In industrial production such as metallurgy and high-tech fields like chip manufacturing, helium is used extensively as a protective gas and electronic specialty gas. In the medical field, helium is primarily used in magnetic resonance imaging (MRI) devices, where it is liquefied into liquid helium and used as a coolant for the superconducting coils. In aerospace engineering, due to its highly stable properties, helium serves as the driving gas for various pneumatic valves on rockets and as a pressurizing gas in rocket fuel tanks. Helium has become an indispensable key resource for national security and the development of high-tech industries, holding a significant strategic position.

[0003] Due to the strategic importance of helium resources, liquid helium tank containers (also known as liquid helium tank containers) play a crucial role in the large-capacity storage and transportation of liquid helium due to their economic efficiency. Compared with other cryogenic liquids, liquid helium has low latent heat, low density, good thermal conductivity, and strong diffusivity. Liquid helium tank containers are typically used for pressurized storage and transportation, making their structure more complex and subject to more demanding operating loads than ordinary pressure vessels. Existing large-capacity liquid helium tank containers often employ liquid nitrogen containers, liquid nitrogen protective screens, or multi-screen insulation structures, sometimes combining several insulation methods. Because of the use of existing insulation methods, internal heat leakage or excessively high temperatures can cause liquid helium to evaporate, leading to internal pressurization. When the container pressure exceeds its allowable pressure, it must be depressurized, resulting in significant loss and waste of liquid helium and potential safety hazards during depressurization.

[0004] In summary, existing technologies may lead to the following problems during the pressurized storage and transportation of cryogenic liquefied gases: the liquid helium inside the liquid helium tank may evaporate due to heat leakage or excessively high temperature, resulting in rapid internal pressurization and subsequent depressurization. This could cause significant loss and waste of liquid helium and may also pose safety hazards during the depressurization process. Summary of the Invention

[0005] This invention provides a large-capacity, zero-evaporation liquid helium storage tank to at least solve the technical problems of existing liquid helium tanks being unable to be stored under pressure for long periods and transported over long distances.

[0006] According to an embodiment of the present invention, a large-capacity zero-evaporation liquid helium storage tank is provided, comprising: an inner container of the liquid helium tank, a cold shield coil for the inner container of the liquid helium tank, liquid helium inlet and outlet pipes, composite multilayer insulation material, an inner copper shield, a flash vapor transfer pipe, insulation support, an outer copper shield, an outer container of the liquid helium tank, a steel frame of the liquid helium tank, a liquid helium inlet transfer pipeline, a cooling medium inner container, a cold shield coil for the cooling medium inner container, composite multilayer insulation material II, inner copper shield II, insulation support II, outer copper shield II, a cryogenic cold head, a cryogenic refrigerator, and a one-way liquid filling control valve; wherein:

[0007] The liquid helium tank container is used to store liquid helium. The outer side of the liquid helium tank container is sequentially equipped with a liquid helium tank container cold shield coil, composite multi-layer insulation material, inner copper shield, and outer copper shield.

[0008] One end of the liquid helium inlet / outlet pipe passes through the inner container of the liquid helium tank and is built into the bottom of the inner container of the liquid helium tank. It is used for liquid helium to be introduced into or drained from the inner container of the liquid helium tank. The other end passes through the composite multi-layer insulation material, the inner copper screen, the outer copper screen, and the outer container of the liquid helium tank in sequence and is connected to the helium liquefaction device or liquid helium storage container. The inner container of the liquid helium tank and the outer container of the liquid helium tank are connected by an insulation support.

[0009] The liquid helium tank has a cooling medium inner container on one side for storing helium flash vapor and reliquefied liquid helium, and the outer side is arranged in sequence with a cooling medium inner container cold shield coil, composite multilayer insulation material II, inner copper shield II, and outer copper shield II.

[0010] One end of the liquid helium inlet transmission pipeline passes sequentially through the outer copper shield II, the inner copper shield II, the cooling medium inner container cold shield coil, the composite multi-layer insulation material II, and the cooling medium inner container, and is built into the lower part of the cooling medium inner container. The other end of the liquid helium inlet transmission pipeline passes through the outer copper shield, the inner copper shield, the composite multi-layer insulation material, and the lower part of the liquid helium tank inner container, connecting the cooling medium inner container with the interior of the liquid helium tank inner container. A one-way liquid filling control valve is installed on the liquid helium inlet transmission pipeline.

[0011] The cryogenic refrigerator is located inside the outer container of the liquid helium tank and inside the inner container of the cooling medium. The upper part of the cryogenic refrigerator is located inside the outer container of the liquid helium tank and above the outer side of the inner container of the cooling medium. The middle and lower parts of the cryogenic refrigerator are located inside the inner container of the cooling medium. The lower part of the cryogenic refrigerator is connected to the cryogenic cold head. The cryogenic cold head is located inside the inner container of the cooling medium. One end of the cryogenic cold head is connected to the inner container of the cooling medium. The cryogenic cold head passes through the inner container of the cooling medium, the composite multilayer insulation material II, the inner copper screen II, the outer copper screen II, and the cold screen coil. The inner container of the cooling medium is connected to the outer container of the liquid helium tank through the insulation support II.

[0012] Furthermore, one end of the liquid helium inlet / outlet pipe passes through the inner container of the liquid helium tank and is built into the bottom of the inner container of the liquid helium tank. The other end is connected to the helium liquefaction unit or liquid helium storage container through an insulated vacuum pipeline and through a composite multi-layer insulation material, an inner copper screen, an outer copper screen, and the outer container of the liquid helium tank.

[0013] Furthermore, inlet and outlet valves are arranged between the outer copper screen and the outer container of the liquid helium tank to control the inlet and outlet flow rates.

[0014] Furthermore, a cooling coil is wrapped around the outer side of the liquid helium tank inner container, and the cooling medium of the cooling coil provides cooling to the liquid helium tank inner container.

[0015] Furthermore, the inner container of the liquid helium tank is surrounded by an inner copper shield, and a composite multilayer insulation material is wrapped between the inner container and the inner copper shield. An outer copper shield is also placed outside the inner copper shield to further reduce radiative heat leakage.

[0016] Furthermore, there is an outer container for the liquid helium tank outside the outer copper screen to achieve a vacuum environment; the inner container of the liquid helium tank, the inner container of the cooling medium, and the outer container of the liquid helium tank are connected by an insulating support II; there is a steel frame for the liquid helium tank outside the outer container of the liquid helium tank.

[0017] Furthermore, an outer copper screen II is arranged on the right side of the outer copper screen. The outer copper screen II contains an inner copper screen II, which contains a cooling medium container for storing the cooling medium of the liquid helium tank.

[0018] Furthermore, a cooling medium inner container is wrapped with a cooling medium inner container cold shield coil, and a composite multilayer insulation material II is filled between the cooling medium inner container and the inner copper shield II.

[0019] Furthermore, a cryogenic refrigerator is arranged above and inside the inner container of the cooling medium, with the lower part of the cryogenic refrigerator connected to the cryogenic cold head; the cryogenic cold head is inside the inner container of the cooling medium and is used to cool the cooling medium; the cryogenic refrigerator is a pulse tube refrigerator, GM refrigerator, thermoacoustic refrigerator or reverse Brayton refrigerator, and is single-stage or double-stage; the cryogenic cold head is a single-stage cold head and a two-stage cold head.

[0020] Furthermore, the inner container of the cooling medium includes one end of a flash vapor transfer pipe, which passes through the inner container of the cooling medium, the composite multilayer insulation material II, the inner copper screen II, the outer copper screen II, the insulation vacuum pipeline, and is connected to the composite multilayer insulation material, the inner copper screen, the outer copper screen and the cold screen coil.

[0021] In this embodiment of the invention, a large-capacity zero-evaporation liquid helium storage tank allows liquid helium to flow from a helium liquefier or liquid helium storage device into the inner container of the liquid helium tank via liquid helium inlet and outlet pipes. Subsequently, the helium gas produced after the liquid helium evaporates passes through the cooling coils of the inner container to absorb heat and reduce radiative heat leakage. The heated helium gas then enters the cooling medium inner container via a flash vapor transfer pipe, where it is cooled and liquefied by a cryogenic cold head. A portion of the cryogenic liquid flows back into the inner container of the liquid helium tank via the liquid helium inlet transfer pipeline. This design effectively addresses the rapid increase in internal pressure that can occur during long-term pressurized storage and long-distance transportation of liquid helium, achieving long-term zero-evaporation storage. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 This is a structural diagram of the large-capacity zero-evaporation liquid helium storage tank of the present invention;

[0024] The markings in the diagram are as follows: 1-Liquid helium tank inner container, 2-Liquid helium tank inner container cold shield coil, 3-Liquid helium inlet / outlet pipe, 4-Composite multi-layer insulation material, 5-Inner copper shield, 6-Flash vapor transfer pipe, 7-Insulation support, 8-Outer copper shield, 9-Liquid helium tank outer container, 10-Liquid helium tank steel frame, 11-Liquid helium inlet transfer line, 12-Cooling medium inner container, 13-Cooling medium inner container cold shield coil, 14-Composite multi-layer insulation material II, 15-Inner copper shield II, 16-Outer copper shield II, 17-Cryogenic cold head, 18-Cryogenic refrigerator, 19-One-way liquid filling control valve, 20-Insulation support II. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] To better achieve long-term pressurized storage and long-distance transportation of liquid helium tanks, and to avoid significant loss and waste of liquid helium and safety hazards during discharge, this invention provides a large-capacity zero-evaporation liquid helium tank that can cope with the rapid increase in internal pressure that easily occurs during long-term pressurized storage and long-distance transportation of liquid helium, thus achieving long-term zero-evaporation storage.

[0028] like Figure 1 As shown, a large-capacity zero-evaporation liquid helium storage tank of the present invention includes: an inner container of the liquid helium tank 1, a cold shield coil of the inner container of the liquid helium tank 2, a liquid helium inlet and outlet pipe 3, a composite multilayer insulation material 4, an inner copper shield 5, a flash vapor transfer pipe 6, an insulation support 7, an outer copper shield 8, an outer container of the liquid helium tank 9, a steel frame of the liquid helium tank 10, a liquid helium inlet transfer pipeline 11, a cooling medium inner container 12, a cold shield coil of the cooling medium inner container 13, a composite multilayer insulation material II 14, an inner copper shield II 15, an outer copper shield II 16, a cryogenic cold head 17, a cryogenic refrigerator 18, a one-way liquid filling control valve 19, and an insulation support II 20.

[0029] One end of the liquid helium inlet / outlet pipe 3 is connected to the bottom of the inner container 1 of the liquid helium tank, and the other end is connected to the helium liquefier or liquid helium storage container through an insulated vacuum pipeline and passing through the composite multi-layer insulation material 4, the inner copper screen 5, the outer copper screen 8, the outer container of the liquid helium tank 9, and the steel frame of the liquid helium tank 10. Inlet / outlet valves are arranged between the outer copper screen 8 and the outer container of the liquid helium tank 9 to control the inlet / outlet flow rate. A liquid helium tank inner container cold screen coil 2 is wrapped around the outside of the inner container 1, and the cooling medium of the cold screen provides cooling to the inner container 1 of the liquid helium tank through the cold screen coil.

[0030] The inner container 1 of the liquid helium tank is surrounded by an inner copper shield 5. A composite multi-layered insulation material 4 encloses the inner container 1 and the inner copper shield 5. An outer copper shield 8 surrounds the inner copper shield 5 to reduce radiative heat leakage. An outer container 9 surrounds the outer copper shield 8 to create a vacuum environment. The outer container 9 and the outer copper shield 8 are connected by an insulating support 7 to secure the outer copper shield 8 and other internal structures. A steel frame 10 surrounds the outer container 9.

[0031] An outer copper screen II16 is arranged on the right side of the outer copper screen 8. The outer copper screen II16 contains an inner copper screen II15. The inner copper screen II15 contains a cooling medium inner container 12 for storing the cooling medium of the liquid helium tank. The cooling medium inner container 12 is wrapped with a cooling medium inner container cold shield coil 13. The space between the cooling medium inner container 12 and the inner copper screen II15 is filled with a composite multilayer insulation material II14.

[0032] The bottom of the cooling medium inner container 12 is connected to one end of the liquid helium inlet transmission pipeline 11. The other end of the liquid helium inlet transmission pipeline 11 passes through the outer copper screen 8, the inner copper screen 5, the composite multilayer insulation material 4, and the liquid helium tank inner container 1, connecting the cooling medium inner container 12 to the interior of the liquid helium tank inner container 1. A one-way liquid filling control valve is installed on the liquid helium inlet transmission pipeline to control and regulate the flow rate of liquid helium from the cooling medium inner container 12 to the liquid helium tank inner container 1. The cryogenic refrigerator 18 is arranged inside the outer container 9 of the liquid helium tank and inside the cooling medium inner container 12. The lower part of the cryogenic refrigerator 18 is connected to the cryogenic cold head 17. The cryogenic cold head 17 is inside the cooling medium inner container and is used to cool the cooling medium.

[0033] The upper part of the cooling medium inner container 12 includes a flash vapor transfer pipe 6. The flash vapor transfer pipe 6 passes through the cooling medium inner container 12, the composite multilayer insulation material II14, the inner copper screen II15, the outer copper screen II16, the insulation vacuum pipeline, and passes through the composite multilayer insulation material 4, the inner copper screen 5, the outer copper screen 8 and the cold screen coil 2, so as to realize the connection between the cooling medium inner container 12 and the upper part of the liquid helium tank inner container 1.

[0034] During operation, liquid helium flows from the helium liquefaction unit or liquid helium storage device into the inner container 1 of the liquid helium tank via the liquid helium inlet / outlet pipe 3. The helium gas produced after the liquid helium evaporates then passes through the cooling coil 2 within the inner container of the liquid helium tank to absorb heat and reduce radiative heat loss. The heated helium gas then enters the cooling medium inner container 12 via the flash vapor transfer pipe 6, where it is cooled and liquefied by the cryogenic cold head 17. When the liquid level in the cooling medium inner container is higher than that in the inner container of the liquid helium tank, the one-way liquid filling control valve 19 can be opened, allowing some of the cryogenic liquid to flow back into the inner container 1 of the liquid helium tank via the liquid helium inlet transfer pipe 11, achieving long-term zero-evaporation storage.

[0035] The beneficial effects of this invention are as follows:

[0036] Compared with the best existing technology, the advantage of this invention is that it can cope with the situation where the internal pressure of liquid helium tanks is prone to rise rapidly during long-term pressurized storage of liquid helium and long-term, long-distance transportation of liquid helium, and achieve long-term zero-evaporation storage.

[0037] The key points / protection points of this invention are:

[0038] 1. The inner container of the cooling medium is connected to the refrigeration unit, and a cryogenic cold head is arranged on the upper part of the inner container. The upper part of the inner container of the cooling medium is connected to the cold shield coil of the inner container of the liquid helium tank via a flash vapor transfer pipe. The lower part of the inner container of the cooling medium is connected to the inner container of the liquid helium tank via a liquid helium inlet transfer line.

[0039] 2. The outer side of the liquid helium tank container is wrapped with a liquid helium tank container cooling coil. The outer side of the cooling medium container is wrapped with a cooling medium container cooling coil.

[0040] 3. The outer side of the liquid helium tank's inner container is an inner copper screen, and the outer side of the inner copper screen is an outer copper screen.

[0041] 4. An outer copper screen II is arranged on the right side of the outer copper screen. The outer copper screen II contains an inner copper screen II, and the inner copper screen II contains a cooling medium container.

[0042] 5. The liquid helium tank's inner contents are wrapped with a composite multi-layer insulation material between them and the inner copper screen.

[0043] 6. The space between the cooling medium container and the inner copper screen II is filled with composite multilayer insulation material II.

[0044] 7. One end of the liquid helium inlet and outlet pipe is connected to the bottom of the inner container of the liquid helium tank, and the other end is connected to the helium liquefaction unit or liquid helium storage container through an insulated vacuum pipeline and through the composite multi-layer insulation material, inner copper screen, outer copper screen, and outer container of the liquid helium tank.

[0045] 8. The outer container of the liquid helium tank is connected to the inner container of the liquid helium tank and the inner container of the cooling medium via thermal insulation support and thermal insulation support II, respectively.

[0046] 9. The outer container of the liquid helium tank has a steel frame.

[0047] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0048] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0049] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The system embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection of units or modules may be electrical or other forms.

[0050] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0051] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0052] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0053] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A large-capacity, zero-evaporation liquid helium storage tank, characterized in that, Comprise: Liquid helium tank box inner container, liquid helium tank box inner container cold screen coil, liquid helium in and out of the pipe, composite multi-layer insulation material, inner copper screen, flash gas transmission pipe, thermal support, outer copper screen, liquid helium tank box outer container, liquid helium tank box steel frame, liquid helium into liquid transmission pipeline, cooling medium inner container, cooling medium inner container cold screen coil, composite multi-layer insulation material II, inner copper screen II, thermal support II, outer copper screen II, low temperature cold head, low temperature refrigerator, one-way liquid filling control valve; Wherein: The liquid helium tank box inner container is used for storing liquid helium, and the outer side of the liquid helium tank box inner container is sequentially provided with a liquid helium tank box inner container cold screen coil, a composite multi-layer insulation material, an inner copper screen and an outer copper screen. One end of the liquid helium in and out of the pipe penetrates through the liquid helium tank box inner container and is built-in at the bottom of the liquid helium tank box inner container, and is used for liquid helium into or out of the liquid helium tank box inner container, and the other end is sequentially connected with the helium liquefier or the liquid helium storage container through the composite multi-layer insulation material, the inner copper screen, the outer copper screen and the liquid helium tank box outer container. The cooling medium inner container is arranged on one side of the liquid helium tank box inner container and is used for storing helium flash gas and liquid helium after re-liquefaction, and the outer side of the cooling medium inner container is sequentially provided with a cooling medium inner container cold screen coil, a composite multi-layer insulation material II, an inner copper screen II and an outer copper screen II. One end of the liquid helium into liquid transmission pipeline penetrates through the outer copper screen II, the inner copper screen II, the composite multi-layer insulation material II, the cooling medium inner container cold screen coil and the cooling medium inner container, is built-in at the lower part of the cooling medium inner container, the other end of the liquid helium into liquid transmission pipeline penetrates through the outer copper screen, the inner copper screen, the composite multi-layer insulation material and the lower part of the liquid helium tank box inner container, and connects the cooling medium inner container with the inside of the liquid helium tank box inner container, and a one-way liquid filling control valve is arranged on the liquid helium into liquid transmission pipeline. The low temperature refrigerator is arranged in the inside of the liquid helium tank box outer container and the inside of the cooling medium inner container, wherein the upper part of the low temperature refrigerator is located in the inside of the liquid helium tank box outer container and above the outside of the cooling medium inner container, the middle part and the lower part of the low temperature refrigerator are located in the inside of the cooling medium inner container, and the lower part of the low temperature refrigerator is connected with the low temperature cold head; the low temperature cold head is in the inside of the cooling medium inner container; one end of the flash gas transmission pipe is connected with the cooling medium inner container, the flash gas transmission pipe penetrates through the cooling medium inner container, the composite multi-layer insulation material II, the inner copper screen II, the outer copper screen II, the composite multi-layer insulation material, the inner copper screen, the outer copper screen and the liquid helium tank box inner container cold screen coil and is connected; the cooling medium inner container and the liquid helium tank box outer container are connected through the thermal support II; One end of the liquid helium in and out of the pipe penetrates through the liquid helium tank box inner container, is built-in at the bottom of the liquid helium tank box inner container, and the other end is connected with the helium liquefier or the liquid helium storage container through the thermal vacuum pipeline and the composite multi-layer insulation material, the inner copper screen, the outer copper screen and the liquid helium tank box outer container; The in and out of the valve is arranged between the outer copper screen and the liquid helium tank box outer container to realize the flow regulation and control.

2. The large-capacity zero-evaporation storage liquid helium tank box according to claim 1, characterized by The liquid helium tank box inner container is wound with a liquid helium tank box inner container cold screen coil, and the cold screen cooling medium provides cold energy for the liquid helium tank box inner container through the liquid helium tank box inner container cold screen coil.

3. The large-capacity zero-evaporation storage liquid helium tank box according to claim 1, characterized by The outer side of the inner container of the liquid helium tank box is provided with an inner copper screen, and the inner container and the inner copper screen are wrapped with a composite multi-layer thermal insulation material.

4. The large-capacity zero-evaporation storage liquid helium tank box according to claim 1, characterized by The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment.

5. The large-capacity zero-evaporation storage liquid helium tank box according to claim 1, characterized by The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment.

6. The large-capacity zero-evaporation storage liquid helium tank box according to claim 1, characterized by The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment.

7. The large-capacity zero-evaporation storage liquid helium tank box according to claim 1, characterized by The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment.

8. The large-capacity zero-evaporation storage liquid helium tank box according to claim 1, characterized by The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a vacuum environment. The outer side of the outer copper screen is provided with an outer container of the liquid helium tank box, which is used to realize a

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