Low temperature liquid cargo containment tank and ship

Abstract

The application provides a low-temperature liquid cargo sealed storage tank and a ship. The storage tank comprises a secondary insulation module, a plurality of primary insulation modules arranged inside the secondary insulation module, a primary insulation layer between an inner structural plate and an outer structural plate, an avoiding cut corner arranged at an end of the primary insulation layer, and a limiting part formed by extending the outer structural plate below the avoiding cut corner. A fastening assembly is fixed with the secondary insulation module and arranged between the plurality of primary insulation modules, comprising an adjusting pressing plate, a stud, a nut, a fixing plate, and a curved surface adjusting block. The adjusting pressing plate has a plurality of pressing parts to simultaneously press against the plurality of limiting parts. The fixing plate is fixed on the secondary insulation module. The curved surface adjusting block is clamped between the nut and the adjusting pressing plate. The curved surface adjusting block is curvedly matched with the adjusting pressing plate, and the adjusting pressing plate has a rotating trend relative to the stud. The plurality of pressing parts are adjusted to be in different planes to be adaptively matched and pressed against the plurality of limiting parts with a plane deviation, so as to ensure the assembly stability of the low-temperature liquid cargo sealed storage tank as a whole.

Description

Technical Field

[0001] This invention relates to the field of liquefied gas storage and transportation technology, specifically to a cryogenic liquid cargo sealed storage tank and vessel. Background Technology

[0002] Cryogenic sealed storage tanks are the core storage equipment for cryogenic liquid cargoes such as liquefied natural gas (LNG), liquefied ethylene gas (LEG), and liquefied petroleum gas (LPG). Their structural integrity and sealing reliability are directly related to the safety and service life of the storage and transportation system, and they play a pivotal role in both marine and land-based storage and transportation fields.

[0003] In related technologies, cryogenic liquid cargo sealed storage tanks typically include a secondary insulation module, multiple main insulation modules, and fastening components. The main insulation module is located on the inner side of the secondary insulation module (i.e., the side closer to the cryogenic liquid cargo). The fastening components fixed on the secondary insulation module press against the limiting part of the main insulation module to achieve a fixed connection between the main insulation module and the secondary insulation module.

[0004] However, due to the cumulative tolerances in the manufacturing and assembly of the main insulation modules, the limiting parts of multiple main insulation modules are often difficult to be precisely in the same plane. This makes it impossible for the fastening components to adapt to the flatness deviation of the limiting parts, resulting in some limiting parts not being effectively pressed against. This leads to loosening or gaps between the main insulation modules and between the main insulation modules and the secondary insulation modules, thereby reducing the insulation performance and structural integrity of the storage tank. In severe cases, it may even cause safety accidents such as the leakage of cryogenic liquid cargo. Summary of the Invention

[0005] The main objective of this application is to provide a cryogenic liquid cargo sealed storage tank and vessel to solve the technical problems in the prior art where the fastening components cannot effectively press against each limiting part due to the flatness deviation of the main insulation module limiting part, resulting in loose tank structure and reduced insulation performance. It has the beneficial effects of improving the stability of tank structure, sealing reliability and insulation performance.

[0006] The present invention provides a cryogenic liquid cargo sealed storage tank, comprising a secondary insulation module, a plurality of main insulation modules, and fastening components. The main insulation modules are disposed on opposite inner sides of the secondary insulation modules. Each main insulation module includes an inner structural plate, an outer structural plate, and a main insulation layer disposed between the inner and outer structural plates. The ends of the main insulation layer are provided with clearance chamfers along their thickness direction. The inner structural plate is fixed to the inner wall of the main insulation layer, and the outer structural plate is fixed to the outer wall of the main insulation layer and extends below the clearance chamfer to form a limiting portion located below the clearance chamfer. The fastening assembly is fixed to the secondary insulation module and simultaneously positioned between multiple primary insulation modules. The fastening assembly includes an adjusting plate, studs, nuts, a fixing plate, and a curved adjusting block. The adjusting plate has multiple pressing parts adapted to simultaneously press against multiple limiting parts of the primary insulation modules. The fixing plate is fixed to the secondary insulation module. One end of the stud is fixed to the fixing plate, and the other end of the stud is adapted to pass through the adjusting plate and the curved adjusting block to connect with the nut. The curved adjusting block is clamped between the nut and the adjusting plate. The curved adjusting block and the adjusting plate have a curved surface fit, and the adjusting plate has a rotational tendency relative to the stud, allowing the multiple pressing parts to be positioned in different planes to engage with the multiple limiting parts.

[0007] Furthermore, the curved adjustment block includes a hemispherical block, and the middle part of the adjustment plate has a hemispherical groove, the curved side of the hemispherical block being adapted to fit into the hemispherical groove.

[0008] Furthermore, the adjusting plate has a through hole in the middle, and the stud is adapted to pass through the through hole, the inner diameter of which is larger than the diameter of the stud.

[0009] Furthermore, the multiple pressing parts are constructed as multiple limiting pressure plates, and the multiple limiting pressure plates cooperate with the multiple limiting parts respectively, with an adjustment gap between adjacent limiting pressure plates.

[0010] Furthermore, the adjusting plate includes a central adjusting block, a hemispherical groove is formed on the central adjusting block, and the limiting plate is connected to the central adjusting block through a telescopic arc plate.

[0011] Furthermore, the limiting pressure plate has telescopic pleats that extend toward the center point of the adjusting pressure plate.

[0012] Furthermore, the adjusting plate has four limiting plates, which simultaneously press against the limiting parts of the four main insulation modules, and the four limiting plates are evenly spaced along the circumference of the adjusting plate.

[0013] Furthermore, the main insulation layer has connecting sidewalls at the avoidance chamfer, and the outer structural panels are fixed to the outer sidewalls and connecting sidewalls of the main insulation layer and wrap around the corners of the main insulation layer.

[0014] Furthermore, the outer structural panel includes a large fixed plate and two side fixed plates. The large fixed plate is fixed to the outer wall of the main insulation layer and extends to the lower part of the avoidance chamfer to form a limiting part. The two side fixed plates are connected at an angle. The two side fixed plates are fixed to the limiting part and respectively fixed to the two connecting side walls at the avoidance chamfer. The main insulation layer is recessed into the interior of the main insulation layer at the connecting side wall to form a mounting groove. The side fixed plates are embedded and fixed in the mounting groove.

[0015] According to the present invention, a vessel is also provided, which includes a cryogenic liquid cargo sealed storage tank as described in the first aspect of the present invention.

[0016] In cryogenic liquid cargo sealed storage tanks and ships as described in this invention, by forming a curved surface fit between the curved adjustment block and the adjusting pressure plate, and in accordance with the rotational tendency of the adjusting pressure plate relative to the stud, the adjusting pressure plate can oscillate angularly with the curved surface fit surface as the fulcrum under the action of external force. Since the curved surface fit surface is a continuous and smooth curved profile, the adjusting pressure plate is not limited to a single axis during oscillation, and its posture can be freely adjusted in space. This allows multiple pressing parts on the adjusting pressure plate to adaptively adapt to the positional deviations of their corresponding limiting parts in different directions, placing them in different planes. During installation, when the nut is tightened, the nut is pushed forward along the stud axis and pushes the curved adjustment block. The curved adjustment block transmits the clamping force to the adjusting pressure plate through the curved surface fit surface. The adjusting pressure plate then adaptively adjusts its angular posture, so that each pressing part is respectively attached to the actual plane position of the corresponding limiting part. Therefore, even if there are flatness deviations between multiple limiting parts due to manufacturing tolerances or cumulative assembly errors in multiple main insulation modules, each pressing part can still form an effective pressing fit with its corresponding limiting part, avoiding loosening or gaps caused by individual limiting parts not being pressed. The cryogenic liquid cargo sealed storage tank of the present invention can achieve adaptive fitting and pressing between the fastening components and the limiting parts of multiple main insulation modules, eliminating the pressing failure problem caused by insufficient coplanarity of multiple limiting parts, improving the connection tightness and structural integrity between the main insulation module and the secondary insulation module, ensuring the insulation performance and sealing reliability of the storage tank, and thus improving the operational safety of the storage tank under cryogenic conditions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A partial structural schematic diagram of a cryogenic liquid cargo sealed storage tank provided for an embodiment of this application; Figure 2 for Figure 1 A partial structural diagram of the structure shown; Figure 3 This is a schematic diagram of the structure of a main insulation module provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a fastening assembly provided in an embodiment of this application; Figure 5 for Figure 4 An exploded view of the fastening assembly shown; Figure 6 This is a schematic diagram of the structure of an adjusting pressure plate provided in an embodiment of this application; Figure 7 A schematic diagram of the structure of a fastening assembly and a main insulation module for a cryogenic liquid cargo sealed storage tank provided in an embodiment of this application; Figure 8 A cross-sectional view of a cryogenic liquid cargo sealed storage tank provided for an embodiment of this application; Figure 9 for Figure 8 A magnified view of a portion of point A in the middle; Figure 10 This is a schematic diagram of another adjusting pressure plate provided in an embodiment of this application; Figure 11 This is a schematic diagram of another main insulation module provided in an embodiment of this application; Figure 12 for Figure 11 The diagram shows an exploded view of the main insulation module.

[0019] Reference numerals: 10, secondary insulation module; 20, main insulation module; 21, inner structural plate; 22, outer structural plate; 221, limiting part; 222, large surface fixing plate; 223, side fixing plate; 23, main insulation layer; 231, avoidance chamfer; 233, mounting groove; 30, fastening assembly; 31, adjusting pressure plate; 311, pressing part; 311a, limiting pressure plate; 311b, telescopic pleat; 312, hemispherical groove; 313, through hole; 314, central adjusting block; 315, telescopic arc plate; 32, stud; 33, nut; 34, fixing plate; 35, curved surface adjusting block. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] It should be noted that the cryogenic liquid cargo sealed storage tanks of this application embodiment are particularly suitable for storing cryogenic liquid cargoes such as liquefied natural gas, liquefied ethylene gas, and liquefied petroleum gas in ships or onshore facilities. For ease of understanding, in this application embodiment, with the inside and outside directions of the cryogenic liquid cargo sealed storage tank as a reference, the direction toward the internal storage space of the tank (i.e., the space for storing cryogenic liquid cargo) is defined as "inner side", the direction away from the storage space is defined as "outer side", and the height direction of the main insulation layer 23 (i.e., the extension direction from the inner side to the outer side) is defined as "thickness direction".

[0022] Please see Figures 1 to 9 The diagram illustrates the structure of a cryogenic liquid cargo sealed storage tank according to an embodiment of this application.

[0023] like Figure 1 and Figure 2 As shown in the figure, this application provides a cryogenic liquid cargo sealed storage tank, which includes a secondary insulation module 10, multiple main insulation modules 20, and fastening components 30. The secondary insulation module 10 serves as part of the tank's insulation lining, and the main insulation modules 20 are disposed on the inner side of the secondary insulation module 10, i.e., on the side of the secondary insulation module 10 closest to the cryogenic liquid cargo storage space. The fastening components 30 are fixed to the secondary insulation module 10 and simultaneously disposed among the multiple main insulation modules 20.

[0024] like Figure 3 As shown, each main insulation module 20 specifically includes an inner structural plate 21, an outer structural plate 22, and a main insulation layer 23 disposed between the inner structural plate 21 and the outer structural plate 22. The inner structural plate 21 is fixed to the inner sidewall of the main insulation layer 23, that is, the inner structural plate 21 is fixed to the side of the main insulation layer 23 near the cryogenic liquid cargo storage space; the outer structural plate 22 is fixed to the outer sidewall of the main insulation layer 23, that is, the outer structural plate 22 is fixed to the side of the main insulation layer 23 away from the cryogenic liquid cargo storage space. The end of the main insulation layer 23 is provided with a clearance chamfer 231 along its thickness direction, which forms a stepped notch at the end of the main insulation layer 23. The outer structural plate 22 extends from the outer sidewall of the main insulation layer 23 and passes below the clearance chamfer 231, thereby forming a limiting part 221 located below the clearance chamfer 231.

[0025] like Figure 2 , Figures 4 to 9As shown, the fastening assembly 30 is fixed to the secondary insulation module 10 and disposed in the gap between the multiple main insulation modules 20. The fastening assembly 30 includes an adjusting pressure plate 31, a stud 32, a nut 33, a fixing plate 34, and a curved adjustment block 35. The fixing plate 34 is fixed to the secondary insulation module 10, and one end of the stud 32 is fixedly connected to the fixing plate 34, while the other end extends outward. The adjusting pressure plate 31 has multiple pressing parts 311. The adjusting pressure plate 31 and the curved adjustment block 35 pass through the stud 32 in sequence and are locked by the nut 33, so that the curved adjustment block 35 is clamped between the nut 33 and the adjusting pressure plate 31. The multiple pressing parts 311 simultaneously press against the multiple limiting parts 221 of the multiple main insulation modules 20 to press each main insulation module 20 onto the secondary insulation module 10. Through the curved surface fit between the curved surface adjustment block 35 and the adjustment pressure plate 31, and the rotational tendency of the adjustment pressure plate 31 relative to the stud 32, when the nut 33 is tightened, the adjustment pressure plate 31 can adaptively adjust the spatial angle with the curved surface fit as the fulcrum, thereby adjusting the multiple pressing parts 311 on it to be in different planes to match the flatness deviation of the multiple limiting parts 221 caused by manufacturing or assembly tolerances, and ensure that each pressing part 311 can effectively press and fit with the corresponding limiting part 221.

[0026] Based on this structure, in operation, the cryogenic liquid cargo sealed storage tank of this application embodiment forms a continuous insulation barrier together with the main insulation modules 20 and the secondary insulation modules 10. During installation or maintenance, multiple main insulation modules 20 need to be securely locked in place by fastening components 30. In one possible implementation, the combination of fixing plate 34 and stud 32 is pre-fixed to a preset position of the secondary insulation module 10, and then several main insulation modules 20 to be fixed are positioned so that their limiting parts 221 are in the position to be pressed. The adjusting plate 31 with curved adjustment block 35 is passed through the stud 32 so that the pressing part 311 covers the corresponding limiting part 221, and then the nut 33 is screwed in. During the tightening of the nut 33, the nut 33 pushes the curved adjustment block 35 to move axially along the stud 32, and the curved surface of the curved adjustment block 35 interacts with the mating curved surface on the adjusting plate 31. Since there may be a height difference between the limiting parts 221 of each main insulation module 20, the adjusting pressure plate 31 will automatically compensate for the tilting trend caused by uneven force by using the curved surface to swing around the center of the curved surface, so that each pressing part 311 accurately fits its corresponding limiting part 221, which may not be in the same plane, and presses them tightly one by one.

[0027] Regarding the specific mating structure between the curved surface adjustment block 35 and the adjustment pressure plate 31 mentioned above, in some embodiments, such as Figures 4 to 9As shown, the curved adjustment block 35 includes a hemispherical block, and a hemispherical groove 312 is correspondingly provided in the middle of the adjusting pressure plate 31. The hemispherical block has a spherical side, which forms a curved surface fit with the concave surface of the hemispherical groove 312. By setting the curved adjustment block to include a hemispherical block and fitting the curved side of the hemispherical block into the hemispherical groove in the middle of the adjusting pressure plate, the hemispherical fit structure provides an isotropic rotation fulcrum, allowing the adjusting pressure plate 31 to swing smoothly and with equal stiffness in any direction around the center of the hemispherical block. This further improves the adaptive fit accuracy and fit between the multiple pressing parts 311 and the limiting parts 221 with different heights, making the pressing force distribution of each pressing part 311 on the limiting part 221 more uniform, and avoiding local overload or insufficient pressing.

[0028] To ensure that the adjusting plate 31 is not interfered with by the stud 32 during oscillation, in some embodiments, such as Figures 4 to 9 As shown, the adjusting pressure plate 31 has a through hole 313 in the middle, through which the stud 32 passes. The inner diameter of the through hole 313 is larger than the diameter of the stud 32. Thus, when the adjusting pressure plate 31 tilts at an angle, a sufficient gap is reserved between the wall of the through hole 313 and the outer surface of the stud 32, providing the adjusting pressure plate 31 with the necessary degrees of freedom of movement to complete the attitude adjustment, avoiding the limitation of its swing stroke due to interference, and ensuring the smooth realization of the surface adaptive adjustment function.

[0029] Next, the specific structure of the adjusting pressure plate 31 will be described in more detail. To achieve better independent adaptability, in some embodiments, such as... Figure 2 , Figures 4 to 7 and Figure 10 As shown, the aforementioned pressing part 311 is constructed as multiple limiting pressure plates 311a, which respectively cooperate with multiple limiting parts 221, and an adjustment gap is provided between adjacent limiting pressure plates 311a. This adjustment gap provides independent avoidance space for each limiting pressure plate 311a to make differentiated deflections in space when it is adjusted in conjunction with the main body of the adjusting pressure plate 31, preventing the limitation of its adjustment stroke due to plate deformation or motion interference, thereby significantly improving the independent adaptation capability of each limiting pressure plate 311a to its corresponding limiting part 221.

[0030] In a typical application scenario, such as Figure 2 , Figures 4 to 7 and Figure 10As shown, four main insulation modules 20 are pressed against the secondary insulation modules 10 by a fastening assembly 30; that is, the adjusting pressure plate 31 is configured with four limiting pressure plates 311a, which simultaneously press against the limiting portions 221 of four adjacent main insulation modules 20. The four limiting pressure plates 311a are evenly spaced along the circumference of the adjusting pressure plate 31. This layout allows one fastening assembly 30 to simultaneously anchor the corners of four adjacent main insulation modules 20, reducing the total number of fasteners. At the same time, the cross-shaped symmetrical layout ensures that the pressing forces are symmetrically distributed about the center of the adjusting pressure plate 31, and the point of application of the resultant force is located on the axis of the stud 32 in the central region, avoiding additional bending moments due to force eccentricity, and significantly improving the force balance and long-term connection stability of the fastening assembly 30 itself.

[0031] More specifically, as a preferred implementation method, such as Figure 6 and Figure 10 As shown, the adjusting pressure plate 31 includes a central adjusting block 314, on which the aforementioned hemispherical groove 312 is formed. The limiting pressure plate 311a is connected to the central adjusting block 314 via a telescopic arc plate 315. When the adjusting pressure plate 31 swings around the hemispherical block, causing a relative displacement difference between each limiting pressure plate 311a and the central adjusting block 314, the telescopic arc plate 315 can absorb the displacement difference through its own elastic telescopic deformation. This allows the pressing position of the limiting pressure plate 311a to be further finely adjusted within a local range, enhancing its tolerance to positional deviations of the limiting part 221 and making the pressing fit tighter.

[0032] Furthermore, to increase the flexibility of the limiting pressure plate 311a, in some embodiments, such as Figure 10 As shown, the limiting pressure plate 311a has telescopic pleats 311b on its surface. The texture of the telescopic pleats 311b extends toward the center point of the adjusting pressure plate 31. When the limiting pressure plate 311a contacts and is pressed against the limiting part 221, the telescopic pleats 311b provide additional elastic deformation margin along the direction of the pressing force, allowing the limiting pressure plate 311a to generate appropriate elastic clearance during the pressing process. This ensures the tightness of the pressing to eliminate gaps and effectively prevents surface damage to the limiting part 221 or the limiting pressure plate 311a that may be caused by rigid hard contact.

[0033] Please see Figure 11 and Figure 12In some embodiments, to enhance the structural strength of the limiting part 221, the main insulation layer 23 has a connecting sidewall formed at the avoidance chamfer 231 at its end. The outer structural plate 22 is not merely attached to the bottom surface of the main insulation layer 23, but is fixed to both the outer sidewall of the main insulation layer 23 and the connecting sidewall, thereby completely enclosing the corner of the main insulation layer 23. This enclosing structure provides continuous, multi-dimensional constraint and reinforcement to the end corner of the main insulation layer 23, effectively dispersing stress and preventing the main insulation layer 23 from cracking at the corner when subjected to long-term compressive forces. Simultaneously, it enhances the bonding strength between the outer structural plate 22 and the main insulation layer 23, ensuring the structural reliability of the limiting part 221.

[0034] Specifically regarding the construction of the outer structural plate 22, in some embodiments, such as Figure 11 and Figure 12 As shown, the outer structural panel 22 includes a large fixed plate 222 and two side fixed plates 223. The large fixed plate 222 is fixedly attached to the outer wall of the main insulation layer 23 and extends downwards towards the avoidance chamfer 231, thereby forming the main support plate of the aforementioned limiting part 221. The two side fixed plates 223 are connected at an angle and are fixed to the limiting part 221, respectively attached and fixed to the two connecting side walls at the avoidance chamfer 231. The two side fixed plates 223 can be integrally formed or separate structures, and this application does not limit this.

[0035] In one specific embodiment, the main insulation layer 23 has an inwardly recessed mounting groove 233 at the connecting sidewall, and the side fixing plate 223 is precisely embedded and fixed within the mounting groove 233. This fitting structure not only increases the bonding area between the outer structural plate 22 and the main insulation layer 23, but also forms a mechanical stop and positioning for the side fixing plate 223 through the mounting groove 233, greatly improving the integrity and anti-peeling ability of the outer structural plate 22 and the main insulation layer 23, making the limiting part 221, which serves as a stress point, more compact and stable.

[0036] This application also provides a vessel that includes a cryogenic liquid cargo containment tank as described in any of the above embodiments. Other structural aspects of the vessel, such as the hull, propulsion system, and navigation system, are mature technologies in the field and will not be described further here. Due to the use of the aforementioned tank, the vessel's liquid cargo containment system has higher structural integrity. Even during long-term voyages and encounters with severe sea conditions, the main insulation modules 20 of the tank can maintain a stable and secure state, reducing the risk of insulation failure and leakage, and improving the overall operational safety of the vessel.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0038] The orientation or spatial relationships involved in this application, such as "top," "bottom," "inner," "outer," "vertical," "lateral," and "longitudinal," are all defined based on the perspective shown in the accompanying drawings. These expressions are intended only to simplify the description of the technical solutions of this invention and are not intended to imply or indicate that the elements referred to must be in a specific orientation or constructed and operated in a specific order. Therefore, the orientation terms mentioned herein should not be regarded as absolute limitations on the claims.

[0039] In the description of this application, terms such as "installation," "connection," "arrangement," and "setup" should be interpreted broadly. Specifically, a connection can be a fixed connection, a detachable connection, or even a structurally integral molding; it can refer to physical mechanical contact or the connection of pipelines; furthermore, a connection includes both direct connection and indirect connection achieved through intermediate components (such as valves or flanges). Those skilled in the art can determine the precise meaning of the above terms in this application based on the specific context and technical logic.

[0040] It should be clarified that the foregoing embodiments are merely representative examples of this application and do not constitute an exclusive definition of the scope of protection of this invention. For those skilled in the art, any conventional changes such as local optimizations, functional equivalent substitutions, or detailed modifications made without departing from the core concept of this application should be included within the scope of the claims of this application.

Claims

1. A cryogenic liquid cargo sealed storage tank, characterized in that, include: Secondary insulation module; Multiple main insulation modules are disposed on the inner side of the secondary insulation modules. Each main insulation module includes an inner structural plate, an outer structural plate, and a main insulation layer disposed between the inner structural plate and the outer structural plate. The end of the main insulation layer is provided with a clearance chamfer along its thickness direction. The inner structural plate is fixed to the inner sidewall of the main insulation layer, and the outer structural plate is fixed to the outer sidewall of the main insulation layer and extends to below the clearance chamfer to form a limiting part located below the clearance chamfer. A fastening assembly is fixed to the secondary insulation module and simultaneously disposed between multiple main insulation modules. The fastening assembly includes: an adjusting pressure plate, a stud, a nut, a fixing plate, and a curved adjusting block. The adjusting pressure plate has multiple pressing portions adapted to simultaneously press against multiple limiting portions of the multiple main insulation modules. The fixing plate is fixed to the secondary insulation module. One end of the stud is fixed to the fixing plate, and the other end of the stud is adapted to pass through the adjusting pressure plate and the curved adjusting block to connect with the nut. The curved adjusting block is clamped between the nut and the adjusting pressure plate. The curved surface adjustment block and the adjustment pressure plate are in curved surface fit, and the adjustment pressure plate has a rotational tendency relative to the stud, which can adjust the multiple pressing parts to be in different planes so as to cooperate with the multiple limiting parts to press against each other.

2. The cryogenic liquid cargo sealed storage tank according to claim 1, characterized in that, The curved adjustment block includes a hemispherical block, and the middle part of the adjustment pressure plate has a hemispherical groove. The curved side of the hemispherical block is adapted to fit into the hemispherical groove.

3. The cryogenic liquid cargo sealed storage tank according to claim 1, characterized in that, The adjusting pressure plate has a through hole in the middle, and the stud is adapted to pass through the through hole. The inner diameter of the through hole is larger than the diameter of the stud.

4. The cryogenic liquid cargo sealed storage tank according to claim 2, characterized in that, The plurality of pressing parts are configured as a plurality of limiting pressure plates, and the plurality of limiting pressure plates respectively cooperate with the plurality of limiting parts, and there is an adjustment gap between adjacent limiting pressure plates.

5. The cryogenic liquid cargo sealed storage tank according to claim 4, characterized in that, The adjusting plate includes: a central adjusting block, a hemispherical groove formed on the central adjusting block, and a limiting plate connected to the central adjusting block via a telescopic arc plate.

6. The cryogenic liquid cargo sealed storage tank according to claim 4, characterized in that, The limiting pressure plate has telescopic pleats that extend toward the center point of the adjusting pressure plate.

7. The cryogenic liquid cargo sealed storage tank according to claim 4, characterized in that, The adjusting pressure plate has four limiting pressure plates, which simultaneously press against the limiting parts of the four main insulation modules. The four limiting pressure plates are evenly spaced along the circumference of the adjusting pressure plate.

8. The cryogenic liquid cargo sealed storage tank according to claim 1, characterized in that, The main insulation layer has a connecting sidewall at the avoidance chamfer, and the outer structural plate is fixed to the outer sidewall of the main insulation layer and the connecting sidewall respectively, and wraps around the corner of the main insulation layer.

9. The cryogenic liquid cargo sealed storage tank according to claim 8, characterized in that, The outer structural panel includes a large fixed plate and two side fixed plates. The large fixed plate is fixed to the outer wall of the main insulation layer and extends to below the avoidance chamfer to form the limiting part. The two side fixed plates are connected at an angle. The two side fixed plates are fixed to the limiting part and respectively fixed to the two connecting side walls at the avoidance chamfer. The main insulation layer is recessed into the interior of the main insulation layer at the connecting side wall to form a mounting groove. The side fixed plates are embedded and fixed in the mounting groove.

10. A ship, characterized in that, Including cryogenic liquid cargo sealed storage tanks as described in any one of claims 1-9.

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