A low temperature liquid storage tank integrated with compensation and support structure

Abstract

The application discloses a low-temperature liquid storage tank integrated with compensation and support structures, which comprises a shell assembly, a content container assembly and a base assembly; the shell assembly is arranged on the base assembly, the content container assembly is arranged in the shell assembly and is in sliding connection with the base assembly, the content container assembly is coaxially arranged with the shell assembly, a compensation structure is arranged between the content container assembly and the shell assembly, at least part of the end of the compensation structure is embedded in the content container assembly, and the compensation structure can drive the content container assembly to move relative to the shell assembly by a predetermined size; in the scheme, the compensation structure is integrated with the upper support structure, and the support can bear and limit; the compensator is connected with the content container and the shell, and can compensate for the displacement of the content container and the shell under low-temperature working conditions and manufacturing size deviation; the cross-sectional area of the compensator is small, and the expansion length is long, so that the heat leakage can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of cryogenic storage technology, and in particular to a cryogenic liquid storage tank with integrated compensation and support structures. Background Technology

[0002] In the field of cryogenic liquid storage tanks, traditional double-layer structures typically consist of an inner tank and an outer protective shell, with insulation material filled between them and a vacuum formed to create a thermal insulation layer. In existing technologies, the inner tank and outer shell are often fixed using rigid support structures or direct flange connections, resulting in a direct mechanical connection path between them. This structure has the following drawbacks: First, the axially stacked arrangement of the inner and outer tanks easily leads to the overall height of the outer shell exceeding transportation or installation limitations (such as the height of a standard shipping container), a problem that is particularly pronounced in the design of large storage tanks. Second, the metal components at the direct connection points between the inner and outer tanks create a significant thermal bridge effect, resulting in a short heat conduction path and a large heat flow cross-sectional area. This causes the efficiency of heat transfer from the cryogenic liquid to the outside through the connection structure to be too high, leading to an increased evaporation loss rate. Furthermore, existing connection methods have poor adaptability to the deformation of the inner and outer tanks, and under alternating temperature conditions, the difference in material shrinkage can easily generate additional stress, affecting structural reliability. Therefore, there is an urgent need for a new structural design scheme that can reduce the overall height of the tank while extending the heat conduction path and reducing the thermal bridge effect. Summary of the Invention

[0003] The purpose of this invention is to provide a cryogenic liquid storage tank with integrated compensation and support structure to address the above-mentioned shortcomings, thereby solving the problems of high overall height, short heat conduction path, and significant thermal effect in existing cryogenic liquid storage tanks.

[0004] This invention is achieved through the following scheme:

[0005] A cryogenic liquid storage tank with integrated compensation and support structure includes an outer shell assembly, an inner container assembly, and a base assembly. The outer shell assembly is disposed on the base assembly, and the inner container assembly is disposed in the outer shell assembly and slidably connected to the base assembly. The inner container assembly is coaxially arranged with the outer shell assembly, and a compensation structure is provided between the inner container assembly and the outer shell assembly. At least a portion of the end of the compensation structure is embedded in the inner container assembly, and the compensation structure is capable of moving the inner container assembly relative to the outer shell assembly by a predetermined size.

[0006] Based on the above-mentioned structure of a cryogenic liquid storage tank integrating compensation and support structures, the outer shell assembly is provided with an upper limit seat and a grooved joint that cooperate with the compensation structure; the grooved joint is coaxially disposed in the upper limit seat, the upper limit seat is fixed on the outer shell assembly, the top end of the grooved joint is fixedly connected to the upper limit seat, and a first cavity is formed between the outer wall surface of the grooved joint and the inner wall surface of the upper limit seat at a predetermined distance; a limit groove is also provided at the center of the outer wall surface of the grooved joint.

[0007] Based on the above-mentioned structure of a cryogenic liquid storage tank integrating compensation and support structures, the inner container assembly is provided with a lower limit seat and a lower connector that cooperate with the compensation structure; the lower limit seat is embedded in the inner container assembly, and the lower connector is coaxially fixed at the center position of the lower limit seat; the lower limit seat is provided with a second cavity connected to the fixed end of the compensation structure and a third cavity connected to the sliding end of the compensation structure, and the second cavity and the third cavity are separated by a supporting inner wall.

[0008] Based on the above-mentioned structure of a cryogenic liquid storage tank integrating compensation and support structures, the compensation structure includes an compensator and a first support cylinder. The compensator is sleeved in the first support cylinder. The upper end of the compensator is coaxially and fixedly connected to a grooved joint, and the lower end of the compensator is coaxially and fixedly connected to a lower connector. The compensator is provided with a flexible compensation section that can expand and contract. The lower end of the compensator is located in a second cavity, the lower end of the first support cylinder is located in a third cavity cylinder, and the upper end of the first support cylinder is located in the first cavity.

[0009] Based on the above-mentioned structure of a cryogenic liquid storage tank integrating compensation and support structure, the lower limit seat is provided with a first through hole penetrating its side wall, and the support is provided with a second through hole whose position matches the first through hole. The first through hole and the second through hole are provided in multiple positions along the circumferential direction of the lower limit. The bottom position of the first support cylinder is provided with a first connecting hole. The first support cylinder and the lower limit seat are connected as a whole by a pin passing through the first connecting hole, the first through hole and the second through hole.

[0010] Based on the above-mentioned structure of a cryogenic liquid storage tank integrating compensation and support structure, a collar is provided at the upper end of the first support cylinder. The collar is circumferentially sleeved on the outside of the first support cylinder. A second connecting hole is also provided on the side wall of the first support cylinder. A through hole matching the second connecting hole is provided on the collar. The collar and the upper end of the first support cylinder are connected as a whole by a limiting screw. The limiting screw passes through the first support cylinder and extends towards the grooved joint to be accommodated in the limiting groove.

[0011] Based on the above-mentioned structure of a cryogenic liquid storage tank integrating compensation and support structure, a first inner extension cylinder is provided at the end of the lower limit seat near the outer shell assembly. The first inner extension cylinder is fixedly connected to the lower support seat, and a first reinforcing part is provided between the first inner extension cylinder and the inner container support; a second reinforcing part is provided between the upper limit seat and the outer shell assembly.

[0012] Based on the above-mentioned structure of a cryogenic liquid storage tank integrating compensation and support structure, a second inner extension cylinder is provided at the bottom of the inner container assembly, at least a portion of the second inner extension cylinder is embedded in the inner container assembly, and a third reinforcing part is provided between the second inner extension cylinder and the inner container assembly; a second support cylinder is provided in the second inner extension cylinder, and the second support cylinder is fixedly connected to the second inner extension cylinder.

[0013] Based on the above-mentioned structure of a cryogenic liquid storage tank integrating compensation and support structures, the base assembly includes a support base, a reinforcing bottom frame, and a support cylinder seat. The reinforcing bottom frame is disposed on the support base, and the support cylinder seat is disposed at the center of the reinforcing bottom frame. The support cylinder seat includes a connecting seat and a conical guide cover. The connecting seat has a cylindrical structure and is connected to the reinforcing bottom frame. The conical guide cover is coaxially disposed on the connecting seat. The reinforcing bottom frame includes a first support member and a second support member. The first support members are connected to each other to form a rectangular structure. The second support member is obliquely disposed at the diagonal of the rectangular structure enclosed by the first support member. The connecting seat is disposed at the staggered position of the second support member.

[0014] Based on the above-mentioned structure of a cryogenic liquid storage tank integrating compensation and support structures, both the first support cylinder and the second support cylinder are made of epoxy fiberglass.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] 1. In this design, the bottom of the inner container assembly and the base assembly are slidably connected, and the top of the inner container assembly can slide between itself and the outer shell assembly via a compensation structure. This allows the inner container assembly to slide near the top of the outer shell assembly under atmospheric pressure when the cavity structure of the inner container assembly and the outer shell assembly is evacuated, ensuring the stability of the overall structure. Furthermore, embedding the compensation structure within the inner container assembly and the outer shell assembly reduces the height of the outer shell assembly while maintaining overall support strength, preventing excessive height. Additionally, the embedded design increases the length of the compensation structure, increasing the support length while ensuring sufficient strength, thereby increasing the heat conduction path between the inner container and the outer shell, reducing heat leakage from the tank, and lowering the daily evaporation rate of the tank (far below national standards), resulting in greater energy efficiency and environmental friendliness.

[0017] 2. This type of storage tank has excellent thermal insulation performance. The theoretically calculated daily evaporation rate is 0.31% / d, while the standard requires a daily evaporation rate of ≤0.45% / d. The daily evaporation rate is 31% lower than the standard requirement, making it more energy-efficient and environmentally friendly, and generating more economic benefits.

[0018] 3. The design takes into account extreme situations such as tank tipping (due to the low center of gravity and large platform at the bottom of the tank, the overturning moment of the tank is relatively large, making it less prone to tipping); the insulation support design has a certain load-bearing margin. If such extreme situations are not considered, the insulation support can be further optimized, thereby reducing the daily evaporation rate of the tank to about 0.271% / d (39.8% lower than the standard requirement), further improving the insulation performance of the tank.

[0019] 4. The embedded support structure of the inner container can effectively extend the heat conduction path of the support and reduce heat leakage of the support.

[0020] 5. The compensation structure is integrated with the upper support structure, and the support serves the functions of bearing and limiting; the compensator connects the inner container and the outer shell, and compensates for the displacement of the inner container and the outer shell under low temperature conditions and manufacturing dimensional deviations; the compensator has a small cross-sectional area and a long unfolded length, which can effectively reduce heat leakage.

[0021] 6. This type of storage tank with a bottom platform structure has a low center of gravity and a large bottom platform, resulting in a particularly large overturning moment and making it difficult to tip over. It can be used immediately upon placement in the area of ​​use without the need for installation, making it convenient to use.

[0022] 7. This type of storage tank can be used to store most cryogenic media. With the relevant explosion-proof equipment configured in the pipeline, it can also be used to store flammable and explosive media such as LNG, making it widely applicable. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the inner container assembly in this invention;

[0025] Figure 3 This is a schematic diagram of the compensation structure in this invention;

[0026] Figure 4 This is a schematic diagram of the connection structure between the base assembly and the inner container assembly in this invention;

[0027] Figure 5 This is a top view of the base assembly in this invention.

[0028] Figure 6 This is a structural example diagram of the grooved joint in this invention;

[0029] Figure Descriptions: 1. Outer shell assembly; 2. Inner container assembly; 3. Base assembly; 4. Compensation structure; 11. Upper limit seat; 12. Groove connector; 13. First cavity; 14. Limiting groove; 15. Second reinforcement; 21. Lower limit seat; 22. Lower connector; 23. Second cavity; 24. Third cavity; 25. Supporting inner wall; 26. First reinforcement; 27. Second inner extension cylinder; 28. Third reinforcement; 29. ​​Sealing plate; 210. Functional piping; 21 1. First inner extension cylinder; 31. Support base; 32. Reinforced bottom frame; 33. Support cylinder seat; 321. First support component; 322. Second support component; 331. Connecting seat; 332. Conical guide cover; 41. Compensator; 42. First support cylinder; 43. Pin; 44. Collar; 45. Limiting screw; 46. Second support cylinder; 51. Interlayer piping; 52. Upper end cap; 53. Lower end cap; 54. Lifting lug; 55. Outer shell end cap; 56. Outer shell accessories. Detailed Implementation

[0030] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0031] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0034] Example 1

[0035] like Figures 1-6 As shown, the present invention provides a technical solution:

[0036] A cryogenic liquid storage tank integrating compensation and support structures includes, but is not limited to, an outer shell assembly 1, an inner container assembly 2, and a base assembly 3; the outer shell assembly 1 is disposed on the base assembly 3, the inner container assembly 2 is disposed in the outer shell assembly 1 and slidably connected to the base assembly 3, the inner container assembly 2 is coaxially disposed with the outer shell assembly 1, a compensation structure 4 is disposed between the inner container assembly 2 and the outer shell assembly 1, at least a portion of the end of the compensation structure 4 is embedded in the inner container assembly 2, and the compensation structure 4 is capable of driving the inner container assembly 2 to move relative to the outer shell assembly 1 by a predetermined size.

[0037] Based on the above structure, the bottom of the inner container assembly 2 and the base assembly 3 are slidably connected in this solution, and the top of the inner container assembly 2 can slide between it and the outer shell assembly 1 through the compensation structure 4. This allows the inner container assembly 2 to slide near the top of the outer shell assembly 1 under atmospheric pressure when the cavity structure of the inner container assembly 2 and the outer shell assembly 1 is evacuated, ensuring the stability of the overall structure. At the same time, the compensation structure 4 is embedded in the inner container assembly 2 and the outer shell assembly 1. On the one hand, it can reduce the height of the outer shell assembly 1 while ensuring the overall support strength, thus avoiding excessive height. On the other hand, the embedded setting can increase the length of the compensation structure 4, thereby increasing the support length while ensuring the support meets the strength requirements, thereby increasing the heat conduction path between the inner container and the outer shell, reducing the heat leakage of the tank, and reducing the daily evaporation rate of the tank (far below the national standard requirements), making it more energy-efficient and environmentally friendly.

[0038] As an example, the outer shell assembly 1 is provided with an upper limit seat 11 and a grooved connector 12 that cooperate with the compensation structure 4; the grooved connector 12 is coaxially disposed in the upper limit seat, the upper limit seat 11 is fixed on the outer shell assembly 1, the top end of the grooved connector 12 is fixedly connected to the upper limit seat 11, and a first cavity 13 is formed between the outer wall surface of the grooved connector 12 and the inner wall surface of the upper limit seat 11 at a predetermined distance; a limit groove 14 is also provided at the center of the outer wall surface of the grooved connector 12.

[0039] Based on the above structure, an upper limit seat 11 and a slotted connector 12 are provided on the outer shell assembly 1. On the one hand, the slotted connector 12 provides a connection base with the compensation structure 4, so that the outer shell assembly 1 and the inner container assembly 2 are connected as one unit. At the same time, a first cavity 13 is formed between the outer wall surface of the slotted connector 12 and the inner wall surface of the upper limit seat 11 at a predetermined distance, which reserves a sliding position for the sliding end of the compensation structure 4. Meanwhile, a limiting groove 14 is provided on the slotted connector 12 to facilitate sliding and limiting with the compensation component.

[0040] As an example, the inner container assembly 2 is provided with a lower limit seat 21 and a lower connector 22 that cooperate with the compensation structure 4; the lower limit seat 21 is embedded in the inner container assembly 2, and the lower connector 22 is coaxially fixed at the center position of the lower limit seat 21. The lower limit seat 21 is provided with a second cavity 23 connected to the fixed end in the compensation structure 4 and a third cavity 24 connected to the sliding end in the compensation structure 4. The second cavity 23 and the third cavity 24 are separated by a supporting inner wall 25.

[0041] The compensation structure 4 may include a compensator 41 and a first support cylinder 42. The compensator 41 is sleeved in the first support cylinder 42. The upper end of the compensator 41 is coaxially and fixedly connected to the grooved joint 12, and the lower end of the compensator 41 is coaxially and fixedly connected to the lower connector 22. A flexible compensation section capable of expansion and contraction is provided in the compensator 41.

[0042] The lower end of the compensator 41 is disposed in the second cavity 23, the lower end of the first support cylinder 42 is disposed in the third cavity 24, and the upper end of the first support is disposed in the first cavity 13.

[0043] A first through hole is provided in the lower limit seat 21, penetrating its side wall. A second through hole is provided inside the support, which is positioned to match the first through hole. Multiple first and second through holes are provided along the circumferential position of the lower limit. A first connecting hole is provided at the bottom of the first support cylinder 42. The first support cylinder 42 and the lower limit seat 21 are connected as a whole by a pin 43 passing through the first connecting hole, the first through hole and the second through hole.

[0044] A collar 44 is provided at the upper end of the first support cylinder 42. The collar 44 is circumferentially sleeved on the outside of the first support cylinder 42. A second connecting hole is also provided on the side wall of the first support cylinder 42. A through hole matching the second connecting hole is provided on the collar 44. The collar 44 and the upper end of the first support cylinder 42 are connected as one unit by a limiting screw 45. The limiting screw 45 passes through the first support cylinder 42 and extends towards the grooved joint 12 and is accommodated in the limiting groove 14.

[0045] Based on the above structure, in this solution, the compensator 41 is fixedly connected to the outer shell assembly 1 and the inner container assembly 2 at both ends, forming fixed ends. The compensator 41 is provided with a flexible telescopic end, which can adapt to the expansion and contraction changes between the outer shell assembly 1 and the inner container assembly 2, and provide a certain supporting force for both. Simultaneously, a first support cylinder 42 is provided. By inserting the upper end of the first support cylinder 42 into the limiting groove 14 with a limiting bolt, when the distance between the inner container assembly 2 and the outer shell assembly 1 changes, the limiting screw 45 can move along the limiting groove 14, thus adapting to expansion and contraction changes. The upper compensation structure 4 is integrated with the upper limit seat 11. The upper limit seat 11 can limit the radial displacement of the compensator 41, prevent the compensator 41 from bending, and ensure that the compensation only generates axial displacement of the compensator 41, preventing the compensator 41 from bending and becoming unstable laterally. At the same time, after the upper support and the grooved joint 12 of the compensator 41 are assembled with screws and collars 44, due to the axial limitation of the grooved joint 12 of the compensator 41, the upper limit seat 11 and the compensator 41 are allowed to have a vertical displacement of about 15mm. When the inner container stores the low-temperature medium and shrinks at low temperature, the grooved joint 12 of the compensator 41 and the upper limit seat 11 will generate relative displacement.

[0046] Meanwhile, the upper limit seat 11 and the inner extension cylinder part on the inner container assembly 2 are both embedded in the inner container structure, which can reduce the overall height of the storage tank while ensuring the support length, thereby making the storage tank more compact. The reduced height also reduces the amount of material used in the outer shell.

[0047] As an example, a first inner extension cylinder 211 is provided on the lower limit seat 21 near the end of the outer shell assembly 1. The first inner extension cylinder 211 is fixedly connected to the lower support seat. A first reinforcing part 26 is provided between the first inner extension cylinder 211 and the inner container bracket. A second reinforcing part 15 is provided between the upper limit seat 11 and the outer shell assembly 1.

[0048] Based on the above structure, by providing the first reinforcing part 26 and the second reinforcing part 15, the connection strength with the inner container assembly 2 and the outer shell assembly 1 is increased respectively, making the connection between the compensation structure 4 and the outer shell assembly 1 and the inner container assembly 2 more stable.

[0049] As an example, a second inner tube 27 is provided at the bottom of the inner container assembly 2, at least a portion of the inner tube 27 is embedded in the inner container assembly 2, and a third reinforcing part 28 is provided between the second inner tube 27 and the inner container assembly 2; a second support tube 46 is provided in the second inner tube 27, and the second support tube 46 is fixedly connected to the second inner tube 27.

[0050] Based on the above structure, by setting the second inner extension cylinder 27 as an embedded structure, the overall volume of the outer shell can be reduced. At the same time, by setting the third reinforcing part 28, the connection strength between the inner container assembly 2 and the second support cylinder 46 can be increased.

[0051] As an example, a sealing plate 29 is provided in the second inner tube 27, and a functional conduit 210 may also be provided at the bottom of the inner container assembly 2.

[0052] As an example, the base assembly 3 may include a supporting base 31, a reinforcing base frame 32, and a supporting cylinder seat 33; the reinforcing base frame 32 is disposed on the supporting base 31, and the supporting cylinder seat 33 is disposed at the center of the reinforcing base frame 32. The supporting cylinder seat 33 may include a connecting seat 331 and a conical guide cover 332; the connecting seat 331 has a cylindrical structure and is connected to the reinforcing base frame 32, and the conical guide cover 332 is coaxially disposed on the connecting seat 331.

[0053] The reinforced base frame 32 may include a first support member 321 and a second support member 322. The first support member 321 is connected to each other to form a rectangular structure. The second support member 322 is obliquely arranged at the diagonal of the rectangular structure surrounded by the first support member 321. The connecting seat 331 is arranged at the staggered position of the second support member 322.

[0054] Based on the above structure, a conical guide shield 332 is provided on the reinforced base frame 32. When the inner container assembly 2 and the outer shell assembly 1 are fitted together, even if there is an eccentricity between the inner container assembly 2 and the outer shell assembly 1, when the lower support of the inner container assembly 2 contacts the conical guide shield 332 on the support base, the support will fall into the support base along the conical surface of the guide shield, reducing the assembly difficulty. At the same time, this solution places the storage tank on the base assembly 3, which has a low center of gravity and a large bottom platform. The overturning moment of the storage tank is particularly large, making it difficult to tip over. It can be used immediately after being placed in the area of ​​use without installation, making it convenient to use.

[0055] As an example, a sandwich pipe 51 may be provided between the inner container assembly 2 and the base assembly 3, and an upper end cap 52 and a lower end cap 53 may be provided on the inner container assembly 2; the outer shell assembly 1 may also include a lifting lug 54, an outer shell end cap 55, and an outer shell accessory 56.

[0056] As an example, both the first support cylinder 42 and the second support cylinder 46 are made of epoxy fiberglass. Epoxy fiberglass has the characteristics of low thermal conductivity and high strength, which can better achieve support and reduce heat loss. Comparing the properties of epoxy fiberglass and stainless steel, stainless steel has an allowable stress of 137 MPa, while epoxy fiberglass has a tensile strength limit of 250 MPa (laminar direction) and a compressive strength limit of 210 MPa (laminar direction). Stainless steel has a thermal conductivity of 16.3 W / m.℃, while epoxy fiberglass has a thermal conductivity of 0.36 W / m.℃.

[0057] Example 2

[0058] A cryogenic liquid storage tank integrating compensation and support structures is a storage device (hereinafter referred to as the tank) suitable for storing cryogenic media (liquid oxygen, liquid nitrogen, liquid argon, etc.). The tank mainly consists of an outer shell assembly 1 (hereinafter referred to as the outer shell), an inner container assembly 2 (including a compensation structure 4, hereinafter referred to as the inner container), a double-layered piping 51, and a support structure. The inner container and the double-layered piping 51 are placed inside the outer shell, and the inner container and the outer shell are assembled and connected through the support structure. Both ends of the double-layered piping 51 are welded to the inner container and the outer shell, respectively. The surfaces of the inner container and the double-layered piping 51 are covered with multiple layers of heat-insulating material. The cavity between the inner container and the outer shell is evacuated to form a vacuum environment. The heat-insulating material and the vacuum environment of the cavity achieve heat insulation between the inner container and the outer shell.

[0059] The inner container and the outer shell are assembled to ensure coaxiality via compensation structure 4. One end of the lower support is assembled inside the inner extension cylinder of the inner container (bonded with low-temperature adhesive during assembly), and the other end is assembled inside the lower support seat of the outer shell (allowing axial sliding). One end of the upper support is assembled inside the upper support seat of the inner container (limited by an assembly pin). A compensator 41 is welded inside the upper support seat, and a grooved connector 12 is welded to the upper end of the compensator 41. The other end of the upper support is assembled onto the grooved connector 12 of the compensator 41 (the connector has an axial U-shaped groove, limited by an assembly pin). The grooved connector 12 of the compensator 41 is welded to the limiting seat of the outer shell. Because the upper support is limited by the pin and the through-hole limiting screw 45, the relative rotation between the inner container and the outer shell is restricted. The U-shaped groove on the grooved connector 12 of the compensator 41 allows the upper support to move within a certain range axially. This structure achieves the functions of bearing load, preventing rotation (of the inner container), and compensating for displacement. The lower part of the outer shell is a flat plate with a reinforced structure. The flat plate structure enhances the overall stability of the storage tank and prevents the tank from tipping over, causing damage and hazards.

[0060] This structure includes, but is not limited to, the following technological innovations:

[0061] 1. The upper compensation structure 4 of the storage tank is integrated with the upper support structure. The upper support can limit the radial displacement of the compensator 41, prevent the compensator 41 from bending, ensure that the compensation only produces axial displacement of the compensator 41, and prevent the compensator 41 from lateral bending instability.

[0062] 2. After the upper support and the grooved joint 12 of the compensator 41 are assembled with screws and rings, due to the axial U-shaped groove of the grooved joint 12 of the compensator 41, there is an allowable vertical displacement of about 15mm between the upper support and the compensator 41. When the inner container stores the low-temperature medium and shrinks at low temperature, a relative displacement occurs between the grooved joint 12 of the compensator 41 and the upper support.

[0063] 3. The upper support base and inner extension cylinder parts on the inner container are both embedded in the inner container structure, which can reduce the overall height of the storage tank while ensuring the support length, making the storage tank more compact. The reduced height also reduces the amount of material used for the outer shell.

[0064] 4. The upper support base and inner extension cylinder of the inner container are designed as an embedded structure. Without increasing the height of the outer shell, the length of the upper and lower supports can be designed as needed (the embedded support base and inner extension cylinder structure are used to adjust the built-in depth). While ensuring that the support meets the strength requirements, the support length is increased, thereby increasing the heat conduction path between the inner container and the outer shell, reducing the heat leakage of the tank, and reducing the daily evaporation rate of the tank (far below the national standard requirements), making it more energy-efficient and environmentally friendly.

[0065] 5. The structural design and assembly process have been optimized. After the outer shell and bottom plate are welded together, the inner container (welded interlayer pipe 51, assembled support components, and wrapped with insulation layer) is hoisted and fitted with the outer shell. No other process equipment is required during the fitting process except for the crane. Two people can operate it, which reduces the difficulty of operation and improves the efficiency of the fitting process.

[0066] 6. The support base on the bottom plate of the outer shell is designed with a conical guide cover 332. When the inner container is fitted with the outer shell, even if there is an eccentricity between the inner container and the outer shell, when the lower support of the inner container contacts the conical guide cover 332 on the support base, the support will fall into the support base along the conical surface of the guide cover, which reduces the assembly difficulty.

[0067] 7. After the upper support is assembled with the grooved connector 12 by screws, the U-shaped groove is an axial structure. The screws restrict the rotation of the support and the outer shell in the circumferential direction, thereby fixing the inner container and the outer shell in the circumferential direction and achieving the function of circumferential limit. This avoids the situation where the connecting pipe or compensator 41 is damaged due to the circumferential rotation of the inner container.

[0068] 8. The profile reinforcement structure of the bottom plate component is obtained through finite element simulation, which can ensure that the tank will not become unstable and collapse when subjected to negative pressure after being evacuated (with an external pressure of 0.1MPa). At the same time, the amount of indentation under load is controlled to about 13mm. When the tank is evacuated, the displacement of the bottom plate collapse is just enough to move the inner container upward by about 13mm, so that the limiting screw 45 at the upper end of the upper support is placed in the middle of the U-shaped groove.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cryogenic liquid storage tank integrating compensation and support structures, characterized in that, The device includes a housing assembly, a housing assembly, and a base assembly. The housing assembly is mounted on the base assembly, and the housing assembly is disposed within the housing assembly and slidably connected to the base assembly. The housing assembly is coaxially arranged with the housing assembly, and a compensation structure is provided between the housing assembly and the housing assembly. At least a portion of the compensation structure is embedded within the housing assembly. The housing assembly has an upper limit seat and a slotted connector that mate with the compensation structure. The slotted connector is coaxially disposed within an upper limit seat, the upper limit seat is fixed to the housing assembly, the top end of the slotted connector is fixedly connected to the upper limit seat, and the outer wall surface of the slotted connector is flush with the upper limit seat. A first cavity is formed by spacing a predetermined distance between the inner wall surfaces of the inner container; a limiting groove is also provided at the center of the outer wall surface of the grooved connector; the inner container assembly is provided with a lower limit seat and a lower connector that cooperate with the compensation structure; the lower limit seat is embedded in the inner container assembly, and the lower connector is coaxially fixed at the center of the lower limit seat; the lower limit seat is provided with a second cavity connected to the fixed end of the compensation structure and a third cavity connected to the sliding end of the compensation structure, and the second cavity and the third cavity are separated by a supporting inner wall; the compensation structure includes an compensator and a first support cylinder, the compensator is sleeved in the first support cylinder, and the compensator... The upper end of the compensator is coaxially and fixedly connected to the grooved joint, and the lower end of the compensator is coaxially and fixedly connected to the lower connector. The compensator is provided with a flexible compensation section capable of telescoping and expanding. The lower end of the compensator is located in the second cavity, the lower end of the first support cylinder is located in the third cavity, and the upper end of the first support is located in the first cavity. The lower limit seat has a first through hole penetrating its side wall, and the support has a second through hole positioned to mate with the first through hole. Multiple first and second through holes are located along the circumferential direction of the lower limit. The bottom of the first support cylinder has a first connecting hole, through which a pin passes. A connecting hole, a first through hole, and a second through hole connect the first support cylinder and the lower limit seat as a whole. A collar is provided at the upper end of the first support cylinder, and the collar is circumferentially sleeved on the outside of the first support cylinder. A second connecting hole is also provided on the side wall of the first support cylinder. A through hole matching the second connecting hole is provided on the collar. The collar and the upper end of the first support cylinder are connected as a whole by a limiting screw. The limiting screw passes through the first support cylinder and extends towards the grooved joint to be received in the limiting groove. This allows the compensation structure to drive the inner container assembly to move relative to the outer shell assembly within a predetermined size, and restricts the relative rotation between the inner container assembly and the outer shell assembly.

2. The cryogenic liquid storage tank with integrated compensation and support structure as described in claim 1, characterized in that: A first inner extension cylinder is provided at the end of the lower limit seat near the outer shell assembly. The first inner extension cylinder is fixedly connected to the lower support seat. A first reinforcing part is provided between the first inner extension cylinder and the inner container bracket. A second reinforcing part is provided between the upper limit seat and the outer shell assembly.

3. The cryogenic liquid storage tank with integrated compensation and support structure as described in claim 2, characterized in that: A second inner tube is provided at the bottom of the inner container assembly. At least a portion of the second inner tube is embedded in the inner container assembly. A third reinforcing part is provided between the second inner tube and the inner container assembly. A second support tube is provided in the second inner tube, and the second support tube is fixedly connected to the second inner tube.

4. The cryogenic liquid storage tank with integrated compensation and support structure as described in claim 3, characterized in that: The base assembly includes a supporting base, a reinforcing base frame, and a supporting cylindrical seat. The reinforcing base frame is disposed on the supporting base, and the supporting cylindrical seat is disposed at the center of the reinforcing base frame. The supporting cylindrical seat includes a connecting seat and a conical guide cover. The connecting seat has a cylindrical structure and is connected to the reinforcing base frame. The conical guide cover is coaxially disposed on the connecting seat. The reinforcing base frame includes a first support member and a second support member. The first support members are connected to each other to form a rectangular structure. The second support member is obliquely disposed at the diagonal of the rectangular structure enclosed by the first support member. The connecting seat is disposed at the staggered position of the second support member.

5. A cryogenic liquid storage tank with integrated compensation and support structure as described in claim 4, characterized in that: Both the first and second support cylinders are made of epoxy fiberglass.

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