Double vacuum layer horizontal liquid helium storage tank

Abstract

The application 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; and the outer wall of the inner container is sequentially provided with a heat-insulating reflection layer and a reinforcing layer from inside to outside; the storage tank can insulate and reflect heat radiation conducted from the inside, effectively reduces the heat radiation and convection caused cold leakage, and reinforces the structure of the inner container prone to failure, so that the safety during equipment operation is improved, and the working efficiency of the equipment is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of oil and gas storage and transportation, and particularly relates to a double-vacuum-layer horizontal liquid helium storage tank. BACKGROUND

[0002] Helium is a colorless and odorless gas, which can be widely used in aerospace, military weapons, low-temperature superconducting and semiconductor research and development fields due to its special physical and chemical properties, and is one of the indispensable raw materials in high-end fields. If helium in the conventional state is directly stored and transported in a container, there is a problem of less single storage and transportation, so it should be treated to convert it into liquid with higher density. However, due to the extremely small interatomic interaction and mass, the liquefaction condition is relatively harsh, and only at extremely low temperature, helium can be converted from gas to liquid to obtain ultra-low temperature close to absolute zero. Therefore, liquid helium is also an extremely important low-temperature source. The known sources of helium are air and natural gas, but the helium content in air is only about 0.005%, while the helium content in natural gas can reach 7%. Although only the natural gas mined near the uranium mine has the characteristics of rich helium, even the natural gas determined to be poor in helium has several times the helium content of air. Therefore, the helium used in industry is mainly purified from natural gas. The currently known helium resources are insufficient to meet the needs of future technological development. The most direct method to solve the problem of insufficient helium resources is to reduce unnecessary waste of helium resources, and a large part of the waste of helium occurs in the storage and transportation process. Therefore, as the main means of liquid helium storage, how to improve the existing liquid helium storage tank is a problem to be solved.

[0003] The liquid helium storage tank is a special-purpose ultra-low-temperature liquid storage tank with extremely high adiabatic performance. At present, high-vacuum multi-layer shielding adiabatic is mostly used to improve the heat retention rate. The high-vacuum multi-layer shielding technology refers to the use of vacuum to reduce convection and heat conduction in the equipment, and the use of multiple layers of shielding to reduce heat radiation. Studies have shown that among heat convection, heat conduction and heat radiation, heat radiation is the main way of heat loss of the liquid helium storage tank. Therefore, in order to reduce the heat loss of the storage tank, the most critical method is to optimize its structure and parameters. How to maximize the reduction of heat radiation of the liquid helium storage tank while ensuring its storage capacity is a major problem in the design of the liquid helium storage tank. SUMMARY

[0004] In order to enrich the product types of the liquid helium storage tank, increase the selection space of the liquid helium storage mode, and improve the heat preservation effect of the liquid helium storage tank, the embodiment of the present application provides a double-vacuum-layer horizontal liquid helium storage tank.

[0005] The embodiment of the present application provides a double-vacuum-layer horizontal liquid helium storage tank, which comprises an inner container, a supporting 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 sequentially arranged from outside to inside, the first vacuum layer is formed between the inner tank and the support wall, and the second vacuum layer is formed between the support wall and the outer tank.

[0007] The first flange structure is fixedly connected with the inner tank and the support wall.

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

[0009] The outer wall of the inner tank is sequentially provided with a heat-insulating reflection layer and a reinforcing layer from inside to outside.

[0010] In one or some optional embodiments, the first flange structure and the second flange structure are oppositely arranged on two sides of the inner tank.

[0011] In one or some optional embodiments, the double-vacuum-layer horizontal liquid helium storage tank further comprises at least two groups of hoisting ropes.

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

[0013] In one or some optional embodiments, the double-vacuum-layer horizontal liquid helium storage tank further comprises a support assembly arranged 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 comprises at least one group of first support columns, and the number of groups is two.

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

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

[0018] In one or some optional embodiments, the support assembly comprises at least two groups of second support columns, and the number of groups is two.

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

[0020] One group of the second support columns is 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 of the hoisting ropes, any of the first support columns and any of the second support columns are staggered and spaced.

[0022] In one or some optional embodiments, the inner tank is a tank 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 material of the reflective screen is aluminum foil.

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

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

[0028] A first heat-insulating pad is arranged between the first inner flange and the first outer flange.

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

[0030] A second heat-insulating 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 comprises a saddle.

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

[0033] The above technical solutions provided in the embodiments of the present application have at least the following beneficial effects:

[0034] The double-vacuum-layer horizontal liquid helium storage tank provided in the embodiments of the present application, by virtue of the arrangement of the double-layer vacuum, effectively reduces the heat radiation and convection caused by the cold leakage under the premise of guaranteeing the storage capacity of the liquid helium storage tank; by virtue of the arrangement of the heat-insulating reflective layer outside the inner container, the heat radiation from the inside conduction is isolated and reflected, thereby greatly reducing the cold leakage of the inner container itself; by virtue of the arrangement of the reinforcing layer outside the heat-insulating reflective layer, the heat-insulating performance of the inner container is reinforced, and the instantaneous force when the liquid helium is rapidly gasified is also resisted, the structure of the inner container which is prone to failure is reinforced, the safety during the operation of the equipment is increased, the heat-insulating performance and the 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 of the equipment is improved.

[0035] The double-vacuum-layer horizontal liquid helium storage tank provided in the embodiment of the present application is capable of restraining the position of the inner container while not limiting the deformation of the inner container through the cooperation of the first flange structure and the hoisting rope, leaving a free deformation area on one side of the inner container, preventing the inner container from being torn due to cold deformation, and prolonging the service life of the inner container; the first flange structure, the second flange structure, the hoisting rope and the support assembly are staggered and spaced, so that the cold quantity propagated through the solid is reduced to the maximum extent, and the cold leakage is further reduced.

[0036] Additional features and advantages of the present application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the present application. The objectives and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0037] The technical solutions of the present application are described in detail below by means of the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate embodiments of the present application, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0039] Figure 1 The structure schematic diagram of the double-vacuum-layer horizontal liquid helium storage tank provided in the embodiment of the present application is shown in the figure;

[0040] Figure 2 The cross-sectional schematic diagram of the double-vacuum-layer horizontal liquid helium storage tank provided in the embodiment of the present application is shown in the figure;

[0041] Figure 3 The cladding layer schematic diagram of the inner container provided in the embodiment of the present application is shown in the figure;

[0042] Figure 4 The structure schematic diagram of the first flange structure provided in the embodiment of the present application is shown in the figure.

[0043] In the figure:

[0044] 1 is an inner container, 11 is an adiabatic reflective layer, 111 is an adiabatic material layer, 12 is a reinforcing layer, 2 is a support wall, 3 is an outer tank, 4 is a first flange structure, 41 is a first inner flange, 42 is a first outer flange, 43 is a first adiabatic pad, 5 is a second flange structure, 6 is a first vacuum layer, 7 is a second vacuum layer, 8 is a hoisting rope, 91 is a first support column, 92 is a second support column, and 10 is a saddle. DETAILED DESCRIPTION

[0045] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although 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. Rather, 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," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "far," "near," "front," and "back" and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0048] The inventors have discovered that existing liquid helium storage tanks still have certain limitations in reducing the amount of liquid helium heat radiation, 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, an 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. The internal insulation layer is designed to be stacked, with the upper layer made of expanded perlite and the lower layer made of foam glass bricks or polyurethane insulation materials, which can achieve both heat dissipation and pressure bearing functions. Since its outer tank adopts a reinforced concrete structure, the device has a strong resistance to external loads. Therefore, 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 insulation layer, the layers can conduct cold energy 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 cap. The device is provided with a liquid nitrogen insulation sleeve on the outside of the liquid helium storage tank and 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 thermal insulation performance can maintain a lower temperature to a certain extent. Moreover, the vacuum shell of the device is not in direct contact with the liquid nitrogen insulation sleeve, preventing the accelerated volatilization of liquid nitrogen, thereby effectively reducing the loss of liquid helium. However, due to the high filling density of its internal structure, although an insulating structure is provided, the low temperature inside can still be transmitted to the outside through solid conduction, resulting in cold leakage. On the other hand, since the internal tank body is not reinforced and is only covered with a circle of aluminum cylinders, if a failure occurs, the liquid helium in the liquid helium storage tank will rapidly vaporize, 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 Figures 1-3 As shown, it includes an inner liner 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 liner 1 are arranged in sequence from the outside to the inside, a first vacuum layer 6 is formed between the inner liner 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 container 1 and the support wall 2;

[0056] The second flange structure 5 is fixedly connected to the support 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 reinforcement 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 liner 1, support wall 2, and outer tank 3 all have a cylindrical center, sealed at both ends with hemispherical caps. The gap between the inner liner 1 and support wall 2 is evacuated to form a first vacuum layer 6; the gap between the support wall 2 and outer tank 3 is also evacuated to form a second vacuum layer 7. The arrangement of the first and second vacuum layers 6 and 7 achieves true double-layer vacuum insulation. Direct contact and transfer of cold between the layers is prevented, effectively reducing cold leakage caused by thermal radiation and convection while ensuring the liquid helium storage tank's full capacity.

[0059] In the embodiment of the present application, referring to Figures 1-3 As shown in the figure, the adiabatic reflective layer 11 and the reinforcing layer 12 are wound layer by layer to wrap the outer wall of the inner container 1, so as to obtain a multi-layered inner container structure, and the thickness of any layer is equal at different angles between layers. The multi-layered inner container structure is an important part of the double-vacuum-layer horizontal liquid helium storage tank.

[0060] In a specific embodiment, the inner container 1 is directly in contact with liquid helium, and will deform with the sharp decrease of the internal temperature when being filled with liquid, so the material thereof can be stainless steel with good low-temperature performance, and the surface thereof is smooth to reduce the heat radiation.

[0061] In a specific embodiment, referring to Figure 3 As shown in the figure, the adiabatic reflective layer 11 wraps the outer wall of the inner container 1, and can isolate and reflect the heat radiation conducted from the inside, so as to greatly reduce the cold leakage of the inner container 1. The adiabatic reflective layer 11 comprises an adiabatic material layer 111 and a reflective screen (not shown in the figure), the adiabatic material layer 111 is filled between the outer wall of the inner container 1 and the reflective screen, the material of the reflective screen is selected from aluminum foil, and the adiabatic material layer 111 can be selected from glass fiber or chemical fiber according to actual needs.

[0062] In a specific embodiment, referring to Figure 3 As shown in the figure, the reinforcing layer 12 is located at the outermost side of the multi-layered inner container structure, and is fully wound on the surface of the reflective screen, and the material thereof is carbon fiber. The fatigue failure of the inner container of the liquid helium storage tank in operation is extremely difficult to detect, and once it occurs, it will cause damage to the inner container, rapid expansion of the internal liquid helium gasification and explosion. In the embodiment, the carbon fiber material with extremely high strength is additionally arranged outside the adiabatic reflective layer 11 of the inner container 1. Since the thermal conductivity of the carbon fiber is extremely low, the reinforcing layer 12 can perform the function of preventing cold leakage together with the adiabatic reflective layer 11, so as to improve the heat preservation performance of the inner container 1. Moreover, since the carbon fiber material has extremely strong fatigue resistance and impact resistance, it can resist the instantaneous force when the liquid helium is rapidly gasified, so the structure of the inner container 1 which is prone to failure can be reinforced, and the safety of the equipment operation can be improved.

[0063] In the embodiment of the present application, the double-vacuum-layer horizontal liquid helium storage tank is provided with the adiabatic reflective layer 11 outside the inner container 1, so as to isolate and reflect the heat radiation conducted from the inside, thereby greatly reducing the cold leakage of the inner container 1. The reinforcing layer 12 is wound outside the adiabatic reflective layer 11, so as to greatly improve the heat preservation performance and structural strength of the storage tank, reduce the resource loss caused by the leakage of the liquid helium storage tank, optimize the overall structure of the equipment, and improve the working efficiency and safety of the equipment.

[0064] In the embodiment of the present application, referring to Figure 1 and Figure 2As shown, the double-vacuum-layer horizontal liquid helium storage tank further comprises a lifting rope 8 arranged between the inner container 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 container 1 and the outer tank 3, and the inner wall and the outer wall thereof are in a vacuum environment. The support wall 2 is fixed in cooperation with the first flange structure 4, the second flange structure 5, the lifting rope 8 and the support assembly connected to the surface of the support wall 2 to form a support assembly structure. The support assembly structure is used for fixing and limiting the inner container 1 and fixedly connecting the outer tank 3.

[0065] In an embodiment, the material of the support wall 2 can be stainless steel. The inner wall and the outer wall of the support wall 2 are in a vacuum environment and are smooth, so the support wall 2 also has a certain heat preservation effect.

[0066] In an embodiment, as shown in Figure 1 , Figure 2 and Figure 4 , the first flange structure 4 is arranged on the inner wall of the half-sphere vertex on one side of the support wall 2 to fix the inner container 1 to the support wall 2, thereby leaving a certain deformation allowance for the inner container 1 while playing a fixing role. The second flange structure 5 is arranged on the outer wall of the half-sphere vertex on the other side of the support wall 2 to fix the outer tank 3 to the support wall 2. The first flange structure 4 comprises a first inner flange 41 and a first outer flange 42, and the second flange structure 5 comprises a second inner flange (not shown in the figure) and a second outer flange (not shown in the figure). In order to control the heat conduction at the connection between the first flange structure 4 and the second flange structure 5 within a certain range, a first heat insulation pad 43 is arranged in the middle of the first inner flange 41 and the first outer flange 42, and a second heat insulation pad (not shown in the figure) is arranged in the middle of the second inner flange and the second outer flange, so as to reduce the heat conduction of the first flange structure 4 and the second flange structure 5 as much as possible.

[0067] In an embodiment, as shown in Figure 1 and Figure 2 , the support assembly structure comprises at least two groups of lifting ropes 8. The lifting ropes 8 are arranged above the inner container 1 and are used for hoisting the inner container 1 in the support wall 2. The number of the lifting ropes 8 can be set according to the actual size of the inner container 1. For example, when the size of the inner container 1 is large, four groups of lifting ropes 8 can be arranged. In this embodiment, in order to reduce the heat conduction of the lifting ropes 8 as much as possible, as shown in Figure 1 and Figure 2 , two groups of lifting ropes 8 are arranged. The two groups of lifting ropes 8 are symmetrically arranged on the middle cylindrical part of the inner container 1, hoist the inner container 1 in the support wall 2, and limit the inner container 1 together with the fixing flange. The lifting ropes 8 are made of heat insulation material. Since the inner container 1 may shrink and deform when it is in contact with liquid helium, the lifting ropes 8 also have high flexibility on the premise of not affecting the heat insulation property, so that the lifting ropes 8 stretch and deform together with the inner container 1 when the inner container 1 shrinks towards the first flange structure 4.

[0068] In a specific embodiment, the material of the hoisting rope 8 includes but is not limited to high-strength carbon fiber, plant fiber, etc. The actual needs can be referred to the detailed description in the prior art, which will not be repeated here.

[0069] In actual working conditions, with the continuous injection of liquid helium, the overall temperature of the inner container 1 will be sharply reduced to-269℃ in a short time, therefore, the inner container 1 will produce shrinkage deformation. If it is fully fixed and assembled, it is easy to cause the inner container 1 to tear when it is deformed. In the embodiment of the application, the hoisting rope 8 cooperates with the first flange structure 4 to constrain the position of the inner container 1 without limiting the deformation of the inner container 1. When the inner container 1 is deformed, it will not change its position. The free deformation area of the inner container 1 is left on the side where the second flange structure 5 is located, so that when the inner container 1 deforms in the direction of the first flange structure 4, the hoisting rope 8 is stretched, thereby preventing the inner container 1 from tearing due to deformation, improving the safety of the equipment, and prolonging the service life of the inner container 1.

[0070] In a specific embodiment, referring to Figure 1 and Figure 2 , the support assembly is arranged above the support wall 2 and / or below the support wall 2, and is used to fixedly connect the outer tank 3 and the support wall 2 together with the second flange structure 5. Referring to Figure 1 and Figure 2 , the support assembly includes at least one group of first support columns 91 and at least two groups of second support columns 92, and the number of a group is two. The first support column 91 is arranged above the support wall 2, and the second support column 92 is arranged below the support wall 2. In this embodiment, in order to reduce the cold conduction of the support assembly as much as possible, referring to Figure 2 , one group of first support columns 91 and two groups of second support columns 92 are arranged. In the cross-sectional direction, the center of the support wall 2 is the common point. Two first support columns 91 are symmetrically distributed at 60°. Each group of two second support columns 92 is symmetrically distributed at 60° in the cross-sectional direction. The first support column 91 is arranged in the middle of the middle cylinder of the support wall 2. The two groups of second support columns 92 are arranged on the two sides of the support wall 2, so that the support columns are uniformly distributed on the outer wall of the support wall 2. At the same time of reducing the cold conduction, the support force is improved, so that the connection between the support wall 2 and the outer tank 3 is 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 lifting rope 8, any first support column 91, and any second support column 92 are all staggered and spaced apart, without direct contact, and at a certain distance from each other, thereby minimizing the risk of internal low temperatures from escaping through solid conduction. Within a double-vacuum horizontal liquid helium storage tank, the liquid helium dissipates cold energy primarily through two pathways: radiation conduction and 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 various 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 staggered 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 leakage of cold 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 restricting its deformation through the cooperation of the first flange structure 4 and the lifting rope 8, leaving a free deformation area on one side for the inner liner 1, thereby preventing the inner liner 1 from tearing due to deformation due to cold, 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 amount of cold transmitted through the solid is minimized to the greatest extent, thereby improving the thermal insulation effect of the equipment.

[0073] In one embodiment, outer tank 3 is the portion of the liquid helium storage tank that contacts the surrounding environment. It is used to seal the outer vacuum layer and provide corrosion protection. In this embodiment, because outer tank 3 is the outermost layer, it can be made of high-strength carbon steel. Furthermore, the outer surface of outer tank 3 can be sprayed with an anti-corrosion paint to enhance its corrosion resistance and extend its service life.

[0074] In one 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 application realizes the reduction of the cold leakage degree of the tank body and the strengthening of the inner container 1 structure without affecting the storage capacity, greatly improves the heat insulation performance and structural strength of the liquid helium storage tank, reduces the resource loss caused by leakage, optimizes the overall structure of the equipment, and improves the working efficiency of the equipment.

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

Claims

1. A double vacuum layer horizontal liquid helium storage tank characterized by, The storage tank is cylindrical, comprising an inner container, a support wall, an outer tank, a first flange structure, a second flange structure, at least two groups of hoisting ropes, and a support assembly arranged between the support wall and the outer tank; The outer tank, the support wall, and the inner container are arranged from outside to inside, a first vacuum layer is formed between the inner container 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 support wall; The second flange structure is fixedly connected to the support wall and the outer tank; An outer wall of the inner container is sequentially provided with a heat-insulating reflective layer and a reinforcing layer from inside to outside; The first flange structure and the second flange structure are oppositely arranged on both sides of the inner container; The at least two groups of hoisting ropes are symmetrically arranged above the inner container and are suitable for hoisting the inner container in the support wall; The support assembly is arranged above the support wall and / or below the support wall; The support assembly comprises at least one group of first support columns, and the number of a group is two; The first support column is arranged above the support wall; Any group of the first support columns is symmetrically distributed at an angle of 60° in a cross-sectional direction; The support assembly comprises at least two groups of second support columns, and the number of a group is two; The second support column is arranged below the support wall; Any group of the second support columns is symmetrically distributed at an angle of 60° in a cross-sectional direction; The first flange structure, the second flange structure, any hoisting rope, any first support column, and any second support column are staggered and spaced apart; The first flange structure comprises a first inner flange and a first outer flange; A first heat-insulating pad is arranged between the first inner flange and the first outer flange; The second flange structure comprises a second inner flange and a second outer flange; A second heat-insulating pad is arranged between the second inner flange and the second outer flange; The cross-sectional direction is a longitudinal cross-section of the storage tank.

2. The dual vacuum layer horizontal liquid helium storage tank according to claim 1, characterized by The inner container is a tank body with a smooth surface.

3. The dual vacuum layer horizontal liquid helium storage tank according to claim 1, characterized by, 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.

4. The dual vacuum layer horizontal liquid helium storage tank according to claim 3, characterized by The material of the reflective screen is aluminum foil.

5. The dual vacuum layer horizontal liquid helium storage tank according to claim 1, wherein The material of the reinforcing layer is carbon fiber.

6. The dual vacuum layer horizontal liquid helium storage tank of claim 1, wherein, A saddle is further included; The saddle is arranged below the outer tank and is used for supporting the outer tank.

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