Double-vacuum-layer horizontal liquid helium storage tank

Abstract

The invention discloses a double-vacuum-layer horizontal liquid helium storage tank which is characterized by comprising an inner container, a supporting wall, an outer tank, a first flange structure and a second flange structure. The outer tank, the supporting wall and the inner container are sequentially arranged from outside to inside, a first vacuum layer is formed between the inner container and the supporting wall, and a second vacuum layer is formed between the supporting wall and the outer tank; the first flange structure is fixedly connected with the inner container and the supporting wall. The second flange structure is fixedly connected with the supporting wall and the outer tank; a heat insulation reflecting layer and a reinforcing layer are sequentially arranged on the outer wall of the inner container from inside to outside; according to the storage tank, on the premise that the storage amount of the liquid helium storage tank is guaranteed, heat radiation conducted from the interior is isolated and reflected, cold leakage caused by heat radiation and convection is effectively reduced, structural reinforcement is conducted on the inner container which is prone to failure, the safety of equipment during operation is improved, and the working efficiency of the equipment is improved.

Description

Technical Field

[0001] The invention relates to the field of oil and gas storage and transportation, and in particular to a double-vacuum-layer horizontal liquid helium storage tank. Background Art

[0002] Helium is a colorless and odorless gas. Due to its special physical and chemical properties, it can be widely used in aerospace, military weapons, low-temperature superconductors and semiconductor research and development, and is one of the indispensable raw materials in the field of high precision. If helium is directly stored and transported in containers under normal conditions, there is a problem of small single storage and transportation volume. Therefore, it should be processed to convert it into a liquid with higher density. However, due to its extremely small interatomic interaction and mass, the liquefaction conditions are relatively harsh. Only at extremely low temperatures can helium be converted from gas to liquid to obtain ultra-low temperatures close to absolute 0 degrees. Therefore, liquid helium is also an extremely important low-temperature source. Currently, the known sources of helium are air and natural gas, but the helium content in air is only about 5 parts per million. In comparison, the helium content in natural gas can reach 7%. Although only natural gas mined near uranium mines has the characteristics of being rich in helium, even natural gas that is judged to be helium-poor has a helium content several times that of air. Therefore, the main source of helium used in industry is purification from natural gas. The currently proven helium resources are insufficient to meet the needs of future technological development. The most direct way to solve the shortage of helium resources is to reduce unnecessary waste of helium resources. A large part of the waste of helium occurs during the storage and transportation process. Therefore, as the most important means of liquid helium storage and transportation, how to improve the existing liquid helium storage tanks is an urgent problem to be solved.

[0003] Liquid helium storage tanks are special-purpose ultra-low temperature liquid storage tanks that have extremely high insulation requirements. Currently, most of them use high-vacuum multi-layer shielding insulation to improve heat retention. High-vacuum multi-layer shielding technology refers to the use of vacuum to reduce convection and heat conduction in the equipment while setting up multi-layer shielding to reduce thermal radiation. Studies have shown that among thermal convection, thermal conduction and thermal radiation, thermal radiation is the main form of heat loss in liquid helium storage tanks. Therefore, in order to reduce the heat loss of the storage tank, the most critical method is to optimize its structure and various parameters. How to minimize its thermal radiation while ensuring the storage capacity of the liquid helium storage tank is a major problem in the current design of liquid helium storage tanks. Summary of the invention

[0004] In order to enrich the product categories of liquid helium storage tanks, increase the selection space of liquid helium storage methods, and improve the thermal insulation effect of liquid helium storage tanks, an embodiment of the present invention provides a double-vacuum layer horizontal liquid helium storage tank.

[0005] The embodiment of the present invention provides a double vacuum layer horizontal liquid helium storage tank, comprising an inner tank, a support wall, an outer tank, a first flange structure and a second flange structure;

[0006] The outer tank, the support wall and the inner tank are arranged in sequence from the outside to the inside, a first vacuum layer is formed between the inner tank and the support wall, and a second vacuum layer is formed between the support wall and the outer tank;

[0007] The first flange structure is fixedly connected to the inner container and the supporting wall;

[0008] The second flange structure is fixedly connected to the support wall and the outer tank;

[0009] The outer wall of the inner container is provided with a heat insulating reflective layer and a reinforcement layer in sequence from the inside to the outside.

[0010] In one or some optional embodiments, the first flange structure and the second flange structure are arranged on two sides of the inner container opposite to each other.

[0011] In one or some optional embodiments, the double-vacuum-layer horizontal liquid helium storage tank further includes at least two sets of lifting ropes;

[0012] The hoisting ropes are symmetrically arranged above the inner liner and are suitable for hoisting the inner liner in the supporting wall.

[0013] In one or some optional embodiments, the double vacuum layer horizontal liquid helium storage tank further includes a support assembly disposed between the support wall and the outer tank;

[0014] The support assembly is arranged above the support wall and / or below the support wall.

[0015] In one or some optional embodiments, the support assembly includes at least one group of first support columns, the number of each group being two;

[0016] The first support column is arranged above the support wall;

[0017] A group of the first support columns are symmetrically distributed at 60° in the cross-sectional direction.

[0018] In one or some optional embodiments, the support assembly includes at least two groups of second support columns, with one group having two columns;

[0019] The second support column is arranged below the support wall;

[0020] A group of the second support columns are symmetrically distributed at 60° in the cross-sectional direction.

[0021] In one or some optional embodiments, the first flange structure, the second flange structure, any one of the lifting ropes, any one of the first support columns and any one of the second support columns are all arranged in a staggered manner.

[0022] In one or some optional embodiments, the inner liner is a can body with a smooth surface.

[0023] In one or some optional embodiments, the heat-insulating reflective layer comprises a heat-insulating material layer and a reflective screen;

[0024] The heat insulating material layer is arranged between the outer wall of the inner container and the reflective screen.

[0025] In one or some optional embodiments, the reflective screen is made of aluminum foil.

[0026] In one or some optional embodiments, the reinforcement layer is made of carbon fiber.

[0027] In one or some optional embodiments, the first flange structure includes a first inner flange and a first outer flange;

[0028] A first thermal insulation pad is arranged between the first inner flange and the first outer flange.

[0029] In one or some optional embodiments, the second flange structure includes a second inner flange and a second outer flange;

[0030] A second thermal insulation pad is arranged between the second inner flange and the second outer flange.

[0031] In one or some optional embodiments, the double vacuum layer horizontal liquid helium storage tank further includes a saddle;

[0032] The saddle is arranged below the outer tank and is used for supporting the outer tank.

[0033] The beneficial effects of the above technical solution provided in the embodiments of the present invention include at least:

[0034] The double-vacuum-layer horizontal liquid helium storage tank provided in the embodiment of the present invention effectively reduces cold leakage caused by thermal radiation and convection while ensuring the storage capacity of the liquid helium storage tank through the setting of double-layer vacuum; by setting a heat-insulating reflective layer outside the inner tank, the heat radiation transmitted from the inside is isolated and reflected, thereby greatly reducing the cold leakage of the inner tank itself; by wrapping a reinforcing layer outside the heat-insulating reflective layer, while strengthening the thermal insulation performance of the inner tank, it also provides an instantaneous force to resist the rapid gasification of liquid helium, and structurally reinforces the inner tank that is prone to failure, increases the safety of equipment operation, greatly improves the thermal insulation performance and structural strength of the storage tank, reduces the resource loss caused by leakage of the liquid helium storage tank, optimizes the overall structure of the equipment, and improves the working efficiency of the equipment.

[0035] The double-vacuum layer horizontal liquid helium storage tank provided in the embodiment of the present invention constrains the position of the inner liner without limiting its deformation through the cooperation of the first flange structure and the lifting rope, leaving a free deformation area on one side for the inner liner, thereby preventing the inner liner from being torn due to deformation due to cold, thereby extending the service life of the inner liner; through the staggered distribution of the first flange structure, the second flange structure, the lifting rope and the supporting assembly, the cold amount transmitted through the solid is minimized to the greatest extent, further reducing cold leakage.

[0036] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0037] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0039] Figure 1 It is a schematic structural diagram of a double-vacuum-layer horizontal liquid helium storage tank provided in an embodiment of the present invention;

[0040] Figure 2 It is a cross-sectional schematic diagram of a double vacuum layer horizontal liquid helium storage tank provided in an embodiment of the present invention;

[0041] Figure 3 A schematic diagram of a coating layer of an inner container provided in an embodiment of the present invention;

[0042] Figure 4 It is a structural schematic diagram of the first flange structure provided in an embodiment of the present invention.

[0043] In the figure:

[0044] 1 is the inner liner, 11 is the heat-insulating reflective layer, 111 is the heat-insulating material layer, 12 is the reinforcing layer, 2 is the supporting wall, 3 is the outer tank, 4 is the first flange structure, 41 is the first inner flange, 42 is the first outer flange, 43 is the first insulation pad, 5 is the second flange structure, 6 is the first vacuum layer, 7 is the second vacuum layer, 8 is the lifting rope, 91 is the first supporting column, 92 is the second supporting column, and 10 is the saddle. DETAILED DESCRIPTION

[0045] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0046] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "far", "near", "front", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The inventors have found that the existing liquid helium storage tanks still have certain limitations in reducing the thermal radiation of liquid helium, and it is difficult to truly solve the problem of liquid helium cooling leakage. Some liquid helium storage tanks even have certain safety hazards, such as:

[0049] An existing spherical ultra-low temperature storage tank device includes an inner tank, an outer tank, a cold insulation layer and an airtight layer. The inner tank of the device can be made of 304, 316 or nickel-based alloy steel, which can withstand the environment inside the ultra-low temperature tank, and the internal cold insulation layer is designed with a stacking type. The upper layer is made of expanded perlite, and the lower layer is made of foam glass bricks or polyurethane insulation materials, which can achieve the two functions of heat dissipation and pressure bearing. Since its outer tank adopts a reinforced concrete structure, the device has a strong external load resistance, so while breaking through the volume limit of the storage tank, it can also meet the overall safety and reliability requirements. However, since the device is not equipped with a true vacuum cold insulation layer, the layers can conduct cold through direct contact, so the problem of cold leakage is not solved; on the other hand, although the spherical inner tank has a high structural strength, there is still a high probability of fatigue and failure in a deep cold environment, resulting in the loss of contents and secondary public safety accidents.

[0050] An existing liquid helium storage device for temperature zone protection includes a liquid helium storage tank, a liquid nitrogen insulation sleeve, a liquid nitrogen outer cylinder, a liquid nitrogen inner cylinder, an aluminum cylinder, a liquid nitrogen inlet pipe, a vacuum shell, and an end cover. The device is provided with a liquid nitrogen insulation sleeve on the outside of the liquid helium storage tank, and is provided with a circle of aluminum cylinders. Therefore, after the device has been running for a certain period of time, even if a certain amount of liquid nitrogen is lost, the aluminum cylinder with excellent insulation performance can maintain a lower temperature to a certain extent, and the vacuum shell of the device is not in direct contact with the liquid nitrogen insulation sleeve, which prevents the accelerated volatilization of liquid nitrogen, thereby effectively reducing the loss of liquid helium. However, due to the high filling degree of its internal structure, although an insulation structure is provided, the internal low temperature will still be transmitted to the outside through the solid to cause cold leakage; on the other hand, since the internal tank body has not been reinforced and is only covered with a circle of aluminum cylinders, if failure occurs, the liquid helium in the liquid helium storage tank will be rapidly vaporized, endangering the safety of surrounding facilities and causing a large amount of resource waste.

[0051] Based on this, an embodiment of the present invention provides a double-vacuum layer horizontal liquid helium storage tank, which is described in detail below through specific embodiments.

[0052] Example

[0053] The embodiment of the present invention provides a double vacuum layer horizontal liquid helium storage tank, referring to Figure 1-Figure 3 As shown, it includes an inner tank 1, a support wall 2, an outer tank 3, a first flange structure 4 and a second flange structure 5;

[0054] The outer tank 3, the support wall 2 and the inner tank 1 are arranged in sequence from the outside to the inside, a first vacuum layer 6 is formed between the inner tank 1 and the support wall 2, and a second vacuum layer 7 is formed between the support wall 2 and the outer tank 3;

[0055] The first flange structure 4 is fixedly connected to the inner tank 1 and the supporting wall 2;

[0056] The second flange structure 5 is fixedly connected to the supporting wall 2 and the outer tank 3;

[0057] The outer wall of the inner container 1 is provided with a heat insulating reflective layer 11 and a reinforcing layer 12 in sequence from the inside to the outside.

[0058] In the embodiment of the present invention, referring to Figure 1 and Figure 2 As shown, the inner tank 1, the supporting wall 2 and the outer tank 3 are all cylindrical in the middle, and the tank bodies are closed with hemispherical heads at both ends. The gap between the inner tank 1 and the supporting wall 2 is evacuated to form a first vacuum layer 6; the gap between the supporting wall 2 and the outer tank 3 is evacuated to form a second vacuum layer 7. The setting of the first vacuum layer 6 and the second vacuum layer 7 realizes the double-layer vacuum cold preservation in the true sense. It is difficult for the layers to directly contact and conduct cold. Under the premise of ensuring the storage capacity of the liquid helium storage tank, the cold leakage caused by thermal radiation and convection is effectively reduced.

[0059] In the embodiment of the present invention, referring to Figure 1-Figure 3 As shown, by wrapping the insulating reflective layer 11 and the reinforcing layer 12 around the outer wall of the inner liner 1 layer by layer, a multi-layer inner liner structure is obtained, and the thickness of any layer is equal at different angles between layers. The multi-layer inner liner structure is an important part of the double-vacuum layer horizontal liquid helium storage tank.

[0060] In a specific embodiment, the inner liner 1 is the part that directly contacts with the liquid helium. When it is filled with liquid, it will deform as the internal temperature drops sharply. Therefore, its material can be stainless steel with good low-temperature performance, and the surface can be smoothed to reduce its thermal radiation rate.

[0061] In a specific embodiment, referring to Figure 3 As shown, the heat-insulating reflective layer 11 is wrapped around the outer wall of the inner liner 1, which can insulate and reflect the heat radiation conducted from the inside, thereby greatly reducing the cold leakage of the inner liner 1 itself. The heat-insulating reflective layer 11 includes a heat-insulating material layer 111 and a reflective screen (not shown in the figure). The heat-insulating material layer 111 is filled between the outer wall of the inner liner 1 and the reflective screen. The reflective screen material is aluminum foil. The heat-insulating material layer 111 can be made of glass fiber or chemical fiber according to actual needs.

[0062] In a specific embodiment, referring to Figure 3 As shown, the reinforcing layer 12 is located at the outermost side of the multi-layer liner structure and is fully wrapped around the surface of the reflective screen. The material is carbon fiber. Fatigue failure of the liner of a liquid helium storage tank in operation is extremely difficult to detect. Once it occurs, the liner will be damaged, and the internal liquid helium will be vaporized to produce rapid expansion and then cause an explosion. In this embodiment, a carbon fiber material with extremely high strength is attached to the outside of the thermal insulation reflective layer 11 of the liner 1. Since the thermal conductivity of carbon fiber is extremely low, the reinforcing layer 12 can perform the function of preventing cold leakage together with the thermal insulation reflective layer 11, and enhance the thermal insulation performance of the liner 1; and, since the carbon fiber material has extremely strong fatigue resistance and impact resistance, it can withstand the instantaneous force when the liquid helium is rapidly vaporized. Therefore, the liner 1 that is prone to failure can be structurally reinforced to increase the safety of the equipment during operation.

[0063] The double-vacuum-layer horizontal liquid helium storage tank provided in the embodiment of the present invention isolates and reflects the heat radiation conducted from the inside by arranging a heat-insulating reflective layer 11 outside the inner tank 1, thereby greatly reducing the cold leakage of the inner tank 1 itself; by wrapping a reinforcing layer 12 outside the heat-insulating reflective layer 11, the thermal insulation performance and structural strength of the storage tank are greatly improved, the resource loss caused by the leakage of the liquid helium storage tank is reduced, the overall structure of the equipment is optimized, and the working efficiency and safety of the equipment are improved.

[0064] In the embodiment of the present invention, refer to Figure 1 and Figure 2As shown, the double vacuum layer horizontal liquid helium storage tank also includes a hoisting rope 8 arranged between the inner liner 1 and the support wall 2 and a support assembly arranged between the support wall 2 and the outer tank 3. The support wall 2 is arranged between the inner liner 1 and the outer tank 3, and its inner wall and outer wall are both in a vacuum environment. The support wall 2 is fixed with the first flange structure 4 connected to the surface of the support wall 2, the second flange structure 5, the hoisting rope 8 and the support assembly to form a support assembly structure. The support assembly structure is used to fix the inner liner 1 and fix the outer tank 3.

[0065] In a specific embodiment, the support wall 2 may be made of stainless steel, the inner and outer walls of which are both in a vacuum environment and are smoothed, thus having a certain heat preservation effect.

[0066] In a specific embodiment, referring to Figure 1 , Figure 2 and Figure 4 As shown, the first flange structure 4 is arranged on the inner wall of the hemispherical vertex on one side of the supporting wall 2, fixing the inner liner 1 to the supporting wall 2, thereby playing a fixing role and leaving a certain deformation margin for the inner liner 1, and the second flange structure 5 is arranged on the outer wall of the hemispherical vertex on the other side of the supporting wall 2, fixing the outer tank 3 to the supporting wall 2. The first flange structure 4 includes a first inner flange 41 and a first outer flange 42, and the second flange structure 5 includes a second inner flange (not shown in the figure) and a second outer flange (not shown in the figure). In order to control the cold conduction at the connection between the first flange structure 4 and the second flange structure 5 within a certain range, a first insulation pad 43 is arranged between the first inner flange 41 and the first outer flange 42, and a second insulation pad (not shown in the figure) is arranged between the second inner flange and the second outer flange, so as to minimize the cold conduction between the first flange structure 4 and the second flange structure 5.

[0067] In a specific embodiment, referring to Figure 1 and Figure 2 As shown, the supporting assembly structure includes at least two sets of lifting ropes 8, which are arranged above the inner liner 1 and are used to lift the inner liner 1 into the supporting wall 2. The number of lifting ropes 8 can be set according to the actual size of the inner liner 1. For example, when the size of the inner liner 1 is large, four sets of lifting ropes 8 can be set. In this embodiment, in order to minimize the cold conduction of the lifting ropes 8, refer to Figure 1 and Figure 2 As shown, two sets of hoisting ropes 8 are provided, and the two sets of hoisting ropes 8 are symmetrically arranged in the middle cylindrical part of the inner liner 1, and the inner liner 1 is hoisted in the support wall 2, and the inner liner 1 is limited together with the fixing flange. The hoisting ropes 8 are made of insulating materials. Since the inner liner 1 may shrink and deform when it encounters liquid helium, the hoisting ropes 8 also have high flexibility under the premise of ensuring that the insulation is not affected, so that when the inner liner 1 shrinks toward the first flange structure 4, the hoisting ropes 8 follow the inner liner 1 to stretch and deform.

[0068] In a specific embodiment, the material of the lifting rope 8 includes but is not limited to high-strength carbon fiber, plant fiber, etc., which can be specifically determined according to actual needs and with reference to the detailed records in the prior art, and will not be repeated here.

[0069] In actual working conditions, with the continuous injection of liquid helium, the overall temperature of the liner 1 will drop sharply to -269°C in a short period of time. Therefore, the liner 1 will shrink and deform. If it is fully fixed and assembled, it is easy to cause the liner 1 to tear during shrinkage and deformation. In the embodiment of the present invention, the lifting rope 8 cooperates with the first flange structure 4 to constrain the position of the liner 1 without restricting the deformation of the liner 1. When the liner 1 shrinks and deforms, its position will not change, and a free deformation area of ​​the liner 1 is left on the side of the second flange structure 5, so that when the liner 1 deforms in the direction of the first flange structure 4, the lifting rope 8 is stretched accordingly, thereby preventing the liner 1 from tearing due to deformation, etc., improving the safety of the equipment and extending the service life of the liner 1.

[0070] In a specific embodiment, referring to Figure 1 and Figure 2 As shown, the support assembly is arranged above the support wall 2 and / or below the support wall 2, and is used to fix the outer tank 3 to the support wall 2 together with the second flange structure 5. Figure 1 and Figure 2 As shown, the support assembly includes at least one group of first support columns 91 and at least two groups of second support columns 92, one group has two, the first support columns 91 are arranged above the support wall 2, and the second support columns 92 are arranged below the support wall 2. In this embodiment, in order to minimize the cold conduction of the support assembly, refer to Figure 2 As shown, a group of first support columns 91 and two groups of second support columns 92 are provided. In the cross-sectional direction, the center of the support wall 2 is taken as a common point, and the two first support columns 91 are symmetrically distributed at 60°. Each group of two second support columns 92 are symmetrically distributed at 60° in the cross-sectional direction. Moreover, the first support column 91 is provided in the middle of the cylinder in the middle of the support wall 2, and the two groups of second support columns 92 are respectively provided on both sides of the support wall 2, so that the support columns are evenly distributed on the outer wall of the support wall 2, while reducing the conduction of cold, improving the supporting force, and making the connection between the support wall 2 and the outer tank 3 more stable.

[0071] In a specific embodiment, referring to Figure 1 and Figure 2As shown, the first flange structure 4, the second flange structure 5, any hoisting rope 8, any first support column 91 and any second support column 92 are all arranged alternately and spaced apart without direct contact, and there is a certain distance between them, so as to ensure that the internal low temperature does not overflow through solid conduction as much as possible. In a double-vacuum-layer horizontal liquid helium storage tank, liquid helium transmits cold energy to the outside mainly through two paths: one is through radiation conduction, and the other is through solid conduction. Among them, by setting up a double vacuum layer, a smooth inner liner 1 and an insulating reflective layer 11, the storage tank can be effectively prevented from leaking cold through radiation, convection, etc., but since contact connection is required, solid conduction is difficult to avoid. To solve this problem, the present invention arranges the supporting fixed elements in the supporting combination structure (i.e., the first flange structure 4, the second flange structure 5, each lifting rope 8, each first support column 91 and each second support column 92) in an alternating manner, and each supporting fixed element between the support wall 2 and the inner liner 1 is subjected to a certain insulation treatment, so that the internal cold is isolated when it is transmitted to the support wall 2, and a large gap is left between the first vacuum layer and the second vacuum layer, thereby ensuring that even if there is cold that is weakened by the internal supporting fixed elements and transmitted, it can be further weakened in the process of conduction along the support wall 2, thereby controlling the cold leakage to an extremely low level.

[0072] The double-vacuum-layer horizontal liquid helium storage tank provided in the embodiment of the present invention constrains the position of the inner liner 1 while not limiting its deformation through the cooperation of the first flange structure 4 and the lifting rope 8, leaving a free deformation zone on one side for the inner liner 1 to prevent the inner liner 1 from tearing due to deformation due to cold, thereby extending the service life of the inner liner 1 and improving the safety of the equipment; through the staggered distribution of the first flange structure 4, the second flange structure 5, the lifting rope 8 and the supporting assembly, the cold amount transmitted through the solid is minimized to the greatest extent, thereby improving the thermal insulation effect of the equipment.

[0073] In a specific embodiment, the outer tank 3 is the part of the liquid helium storage tank that contacts the surrounding environment, is used to seal the outer vacuum layer, and has an anti-corrosion function. In this embodiment, since the outer tank 3 is in the outermost layer, its material can be carbon steel with relatively high strength, and an anti-corrosion paint can be sprayed on the outer surface of the outer tank 3, thereby improving the anti-corrosion performance of the outer tank 3 and extending the service life of the outer tank 3.

[0074] In a specific embodiment, referring to Figure 1 and Figure 2 As shown, the double vacuum layer horizontal liquid helium storage tank further includes a saddle 10. The saddle 10 is disposed at the bottom of the outer tank 3 and is used to support the outer tank 3 so that the double vacuum layer horizontal liquid helium storage tank is easy to transport.

[0075] The double vacuum layer horizontal liquid helium storage tank provided in the embodiment of the present invention reduces the degree of cold leakage of the tank body and strengthens the structure of the inner tank 1 without affecting the storage capacity, greatly improves the insulation performance and structural strength of the liquid helium storage tank, reduces resource losses caused by leakage, optimizes the overall structure of the equipment, and improves the working efficiency of the equipment.

[0076] Obviously, various changes and modifications may be made to the present invention by those skilled in the art without departing from the spirit and scope of the present invention. The present disclosure is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A double vacuum layer horizontal liquid helium storage tank, characterized in that: It includes an inner tank, a supporting wall, an outer tank, a first flange structure and a second flange structure; The outer tank, the support wall and the inner tank are arranged in sequence from the outside to the inside, a first vacuum layer is formed between the inner tank and the support wall, and a second vacuum layer is formed between the support wall and the outer tank; The first flange structure is fixedly connected to the inner container and the supporting wall; The second flange structure is fixedly connected to the support wall and the outer tank; The outer wall of the inner container is provided with a heat insulating reflective layer and a reinforcement layer in sequence from the inside to the outside.

2. The double vacuum layer horizontal liquid helium storage tank according to claim 1, characterized in that: The first flange structure and the second flange structure are arranged opposite to each other on two sides of the inner container.

3. The double vacuum layer horizontal liquid helium storage tank according to claim 1, characterized in that: Also included are at least two sets of lifting ropes; The at least two groups of hoisting ropes are symmetrically arranged above the inner liner, and are suitable for hoisting the inner liner in the supporting wall.

4. The double vacuum layer horizontal liquid helium storage tank according to claim 3, characterized in that: Also included is a support assembly disposed between the support wall and the outer tank; The support assembly is arranged above the support wall and / or below the support wall.

5. The double vacuum layer horizontal liquid helium storage tank according to claim 4, characterized in that: The support assembly includes at least one group of first support columns, with the number of each group being two; The first support column is arranged above the support wall; The first support columns of any group are symmetrically distributed at 60° in the cross-sectional direction.

6. The double vacuum layer horizontal liquid helium storage tank according to claim 5, characterized in that: The support assembly includes at least two groups of second support columns, with one group having two columns; The second support column is arranged below the support wall; The second support columns of any group are symmetrically distributed at 60° in the cross-sectional direction.

7. The double vacuum layer horizontal liquid helium storage tank according to claim 6, characterized in that: The first flange structure, the second flange structure, any one of the lifting ropes, any one of the first supporting columns and any one of the second supporting columns are all arranged in a staggered manner.

8. The double vacuum layer horizontal liquid helium storage tank according to claim 1, characterized in that: The inner container is a tank body with a smooth surface.

9. The double vacuum layer horizontal liquid helium storage tank according to claim 1, characterized in that: The heat-insulating reflective layer comprises a heat-insulating material layer and a reflective screen; The heat insulating material layer is arranged between the outer wall of the inner container and the reflective screen.

10. The double vacuum layer horizontal liquid helium storage tank according to claim 9, characterized in that: The material of the reflective screen is aluminum foil.

11. The double vacuum layer horizontal liquid helium storage tank according to claim 1, characterized in that: The reinforcement layer is made of carbon fiber.

12. The double vacuum layer horizontal liquid helium storage tank according to claim 1, characterized in that: The first flange structure includes a first inner flange and a first outer flange; A first thermal insulation pad is arranged between the first inner flange and the first outer flange.

13. The double vacuum layer horizontal liquid helium storage tank according to claim 1, characterized in that: The second flange structure includes a second inner flange and a second outer flange; A second thermal insulation pad is arranged between the second inner flange and the second outer flange.

14. The double vacuum layer horizontal liquid helium storage tank according to claim 1, characterized in that: Also included is the saddle; The saddle is arranged below the outer tank and is used for supporting the outer tank.

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