An adiabatic module and a cryogenic liquid storage tank

Abstract

This application relates to the technical field of cryogenic liquid transportation, and particularly to a thermal insulation module and a cryogenic liquid storage tank. The thermal insulation module includes a first support plate, a second support plate, and a thermal insulation layer sandwiched between the first support plate and the second support plate. Each of the two splicing sides of the thermal insulation layer forms a right-angled step and a right-angled groove. When two thermal insulation modules are spliced, the first support plate of the first thermal insulation module can be joined with the second support plate of the second thermal insulation module, the second support plate of the first thermal insulation module can be joined with the first support plate of the second thermal insulation module, the right-angled step of the first part of the first thermal insulation module fills the right-angled groove of the second part of the second thermal insulation module, and the right-angled groove of the second part of the first thermal insulation module is filled by the right-angled step of the first part of the second thermal insulation module. Laying the tank wall with the thermal insulation module of this structure can reduce the cold leakage of the cryogenic liquid storage tank and block the penetration of external heat.

Description

Technical Field

[0001] This application relates to the technical field of cryogenic liquid transportation, and particularly to a thermal insulation module and a cryogenic liquid storage tank. Background Art

[0002] Cryogenic liquids, such as liquefied natural gas (LNG), liquid nitrogen, liquid oxygen, etc., have relatively low liquefaction temperatures, around -200°C. These liquids need to be kept cold during storage and transportation.

[0003] Currently, thermal insulation modules are laid flat on the tank wall of a cryogenic liquid storage tank. There is a through-type splicing seam between two adjacent thermal insulation modules. Along the thickness direction of the tank wall, this through-type splicing seam is a cold leakage channel.

[0004] In order to reduce cold leakage, in the prior art, after the thermal insulation modules are laid, an elastic felt is stuffed at the through-type splicing seam. This treatment method will result in additional construction work and is prone to the phenomenon that the through-type splicing seam is not fully filled. In addition, when the thermal insulation modules shrink at low temperatures, the original gap will expand, resulting in cold leakage between the elastic felt and the thermal insulation modules again. Summary of the Invention

[0005] This application provides a thermal insulation module and a cryogenic liquid storage tank, which can reduce and eliminate the through-type splicing seam between the thermal insulation modules and reduce the loss of cold in the cryogenic liquid storage tank.

[0006] The technical solution of this application is as follows:

[0007] In a first aspect, this application provides a thermal insulation module, including a first support plate, a second support plate, and a thermal insulation layer.

[0008] Along a first direction, the first support plate and the second support plate are disposed opposite to each other. The thermal insulation layer is divided into a first part and a second part. The first part is the part of the thermal insulation layer close to the first support plate, and the first support plate covers the surface of the first part away from the second part. The second part is the part of the thermal insulation layer close to the second support plate, and the second support plate covers the surface of the second part away from the first part.

[0009] Along a second direction, the thermal insulation module has a first splicing side and a second splicing side, and the first splicing side and the second splicing side are opposite sides of the thermal insulation module. And on the first splicing side and the second splicing side, the first part has an extra part relative to the second part, and the extra part forms a right-angled step. The dimension of the right-angled step along the second direction is greater than the unilateral shrinkage dimension of the thermal insulation layer in the second direction. The part where the second part is missing relative to the first part forms a right-angled groove.

[0010] When two adiabatic modules are spliced along the second direction, one of the adiabatic modules is denoted as the first adiabatic module, and the other adiabatic module is denoted as the second adiabatic module. The first support plate of the first adiabatic module can be spliced with the second support plate of the second adiabatic module, the second support plate of the first adiabatic module can be spliced with the first support plate of the second adiabatic module, the right-angled step of the first part of the first adiabatic module fills the right-angled groove of the second part of the second adiabatic module, and the right-angled groove of the second part of the first adiabatic module is filled by the right-angled step of the first part of the second adiabatic module.

[0011] The first direction is perpendicular to the second direction.

[0012] Based on the adiabatic module provided in the first aspect, when the adiabatic module of the present application is used for laying the tank wall, the first support plate of the first adiabatic module is close to the inner surface of the outer tank, and the second support plate of the second adiabatic module is close to the inner surface of the outer tank. When two adjacent adiabatic modules are spliced along the second direction, a first splicing seam is generated between the second support plate of the first adiabatic module and the first support plate of the second adiabatic module, a second splicing seam is generated between the second part of the first adiabatic module and the first part of the second adiabatic module, a third splicing seam is generated between the first support plate of the first adiabatic module and the second support plate of the second adiabatic module, and a fourth splicing seam is generated between the first part of the first adiabatic module and the second part of the second adiabatic module.

[0013] During the cold quantity flow process, the first splicing seam and the second splicing seam are opposite to the right-angled step of the first adiabatic module. The right-angled step intercepts the cold quantity from these two splicing seams and hinders its circulation. The remaining cold quantity after interception needs to be transmitted to the outer tank through the step surface, the third splicing seam and the fourth splicing seam. In this way, when the adiabatic module of the present application is used for laying the inner surface of the outer tank, it can hinder the circulation of cold quantity, increase the circulation path of cold quantity, and slow down the leakage speed of cold quantity.

[0014] During the process of external heat flowing into the low-temperature liquid storage tank, the third splicing seam and the fourth splicing seam are opposite to the right-angled step of the second adiabatic module. The right-angled step intercepts the heat from these two splicing seams and hinders its circulation. The remaining heat after interception needs to be introduced into the tank through the step surface, the first splicing seam and the second splicing seam. In this way, the circulation path of heat is increased, and thus the inflow speed of residual heat is slowed down.

[0015] In addition, the geometric matching of the right-angled step and the right-angled groove provides a self-guiding positioning function for two adjacent adiabatic modules, which can improve the installation efficiency.

[0016] In a possible design, along the third direction, the adiabatic module has a third splicing side and a fourth splicing side, and the third splicing side and the fourth splicing side are opposite sides of the adiabatic module. And on the third splicing side and the fourth splicing side, the first part has a right-angled step that is more than the second part, and the part where the second part is missing relative to the first part forms a right-angled groove.

[0017] The right-angled steps on the first splicing side, the second splicing side, the third splicing side, and the fourth splicing side are connected, and the right-angled grooves on the first splicing side, the second splicing side, the third splicing side, and the fourth splicing side are connected.

[0018] When two adiabatic modules are spliced along the third direction, one of the adiabatic modules is denoted as the first adiabatic module, and the other adiabatic module is denoted as the third adiabatic module. The first support plate of the first adiabatic module can be fitted with the second support plate of the third adiabatic module, the second support plate of the first adiabatic module can be fitted with the first support plate of the third adiabatic module, the right-angled step of the first part of the first adiabatic module fills the right-angled groove of the second part of the third adiabatic module, and the right-angled groove of the second part of the first adiabatic module is filled by the right-angled step of the first part of the third adiabatic module. The first direction, the second direction, and the third direction are perpendicular to each other.

[0019] Based on the adiabatic module provided by this embodiment, along the third direction, the adiabatic module has a third splicing side and a fourth splicing side, and the third splicing side and the fourth splicing side are opposite sides of the adiabatic module. And on the third splicing side and the fourth splicing side, the first part has a right-angled step that is more than the second part, and the part where the second part is missing relative to the first part forms a right-angled groove. In this way, the splicing structure of the adiabatic layer in the third direction is similar to the splicing structure of the adiabatic layer in the second direction. Then, when using the adiabatic module provided by this embodiment for laying the tank wall and the tank bottom, the splicing structure formed when two adjacent adiabatic modules are spliced along the third direction also has the characteristics of reducing the cold leakage and reducing the inflow of external heat.

[0020] In a possible design, the first support plate is a rectangular plate with chamfered corners at the four corners.

[0021] The second support plate is a rectangular plate with right angles at the four corners.

[0022] The shape of the first part is adapted to the first support plate, and the shape of the second part is adapted to the second support plate.

[0023] Based on the adiabatic module provided by this embodiment, when using the laying method provided by this embodiment for the tank bottom or the tank wall, whether it is two adjacent adiabatic modules in the second direction or two adjacent adiabatic modules in the third direction, perfect fitting can be achieved. In this way, it helps to reduce cold leakage and heat inflow.

[0024] In a possible design, the first support plate is a rectangular plate with chamfers at its four corners after being bent, and the bending line is parallel to the edge of the first support plate.

[0025] The second support plate is a rectangular plate with right angles at its four corners after being bent, and the bending line is parallel to the edge of the second support plate.

[0026] The shape of the first part is adapted to the first support plate, and the shape of the second part is adapted to the second support plate.

[0027] Based on the insulation module provided by this embodiment, the insulation module is angular and matches the shape at the inner wall corner of the outer tank. Using the insulation module with this structure to lay the corners of the outer tank can better fit the shape of the outer tank. When laying the tank wall, along the circumferential direction of the tank wall, angular insulation modules can be laid at the corners, and flat insulation modules can be laid between two corners. In this way, along the circumferential direction of the tank wall, through the combined splicing of flat insulation modules and angular insulation modules, there is no through splicing seam on the tank wall, and both the cold leakage and heat infiltration amounts are reduced.

[0028] In a possible design, on the first splicing side and the second splicing side, teeth are provided on the right-angled step. When two insulation modules are spliced along the second direction, there is a gap between the teeth of the first insulation module and the teeth of the second insulation module, and after the first insulation module and the second insulation module shrink in place, the teeth of the first insulation module are in contact with the teeth of the second insulation module.

[0029] Based on the insulation module provided by this embodiment, on the first splicing side and the second splicing side, teeth are provided on the right-angled step of the insulation module. When two insulation modules are spliced along the second direction, there is a gap between the teeth of the first insulation module and the teeth of the second insulation module. After the first insulation module and the second insulation module shrink in place, the teeth of the first insulation module are in contact with the teeth of the second insulation module. In this way, in the second direction, the contact between the teeth forms another barrier to prevent cold leakage and heat infiltration, which helps to give full play to the cold insulation effect of the insulation layer.

[0030] In a possible design, on the third splicing side and the fourth splicing side, teeth are provided on the right-angled step. When two insulation modules are spliced along the third direction, there is a gap between the teeth of the first insulation module and the teeth of the third insulation module, and after the first insulation module and the third insulation module shrink in place, the teeth of the first insulation module are in contact with the teeth of the third insulation module.

[0031] For the insulation module provided by this embodiment, the purpose and effect of providing teeth on the right-angled steps on the third splicing side and the fourth splicing side are similar to those of providing teeth on the first splicing side and the second splicing side, and will not be described in detail here.

[0032] In a possible design, the thickness of the tooth decreases from the root to the top.

[0033] Based on the adiabatic module provided by this embodiment, the thickness of the tooth decreases from the root to the top, endowing the tooth with a certain degree of flexibility. In this way, when two adjacent adiabatic modules contract and squeeze in opposite directions, the tooth deforms, which can avoid damage to the tooth to a certain extent and thus avoid damage to the adiabatic module.

[0034] In a possible design, the adiabatic layer includes a main material and a sealing material, and the sealing material surrounds the main material along the direction from the first splicing side, the second splicing side, the third splicing side to the fourth splicing side.

[0035] Based on the adiabatic module provided by this embodiment, the sealing material is arranged to surround the main material along the first splicing side, the second splicing side, the third splicing side to the fourth splicing side. In this way, it can block the diffusion of cold air from the first splicing side, the second splicing side, the third splicing side to the fourth splicing side into the interior of the main material, and thus play a better cold insulation role.

[0036] In a possible design, the sealing material includes aluminum foil and glass wool layers covered on both sides of the aluminum foil.

[0037] Based on the adiabatic module provided by this embodiment, the aluminum foil in the sealing material has a high reflectivity, which significantly reduces radiative heat transfer in a low-temperature environment. The glass wool layers on both sides of the aluminum foil can inhibit the movement of gas molecules through the fiber porous structure, blocking heat conduction and convective heat transfer. In this way, it can play a good cold insulation role.

[0038] In addition, due to the porous structure of the glass wool layer, the sealing material has a certain degree of compressibility. In this way, it is convenient for the installation of the adiabatic module, and can fill the gap between two adiabatic modules, reducing the cold bridge effect caused by construction joints.

[0039] In a second aspect, based on the same inventive concept, the present application also provides a cryogenic liquid storage tank, including an outer tank and an adiabatic barrier. The adiabatic barrier is laid along the inner wall of the outer tank, and the adiabatic barrier includes any one of the above-mentioned adiabatic modules.

[0040] The cryogenic liquid storage tank of the present application includes the adiabatic module provided by the present application, so it also has the beneficial effects brought by the adiabatic module, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic structural diagram of the outer tank of a land-based cryogenic liquid storage tank.

[0042] Figure 2 It is a schematic diagram of the laying state of the adiabatic module at the tank wall of an existing cryogenic liquid storage tank.

[0043] Figure 3 It is a schematic diagram of the laying state of the thermal insulation module at the bottom of an existing cryogenic liquid storage tank.

[0044] Figure 4 It is a schematic diagram of the structure of a thermal insulation module provided by an embodiment of the present application.

[0045] Figure 5 It is Figure 4 the front view of.

[0046] Figure 6 It is Figure 4 a schematic diagram of the structure of two thermal insulation modules spliced in the second direction as shown.

[0047] Figure 7 It is Figure 4 a schematic diagram of the structure of two thermal insulation modules spliced in the third direction as shown.

[0048] Figure 8 It is a schematic diagram of the bottom laying using the thermal insulation module Figure 4 as shown.

[0049] Figure 9 It is a three-dimensional structure diagram of another shape of the thermal insulation module provided by an embodiment of the present application.

[0050] Figure 10 It is Figure 9 the front view of.

[0051] Figure 11 It is Figure 4 a schematic diagram of the structure of the thermal insulation module shown Figure 9 spliced with the thermal insulation module shown.

[0052] Figure 12 It is a schematic diagram of the tank wall laying using the thermal insulation module Figure 4 and Figure 9 as shown.

[0053] Figure 13 It is a schematic diagram of the structure of another thermal insulation module provided by an embodiment of the present application.

[0054] Figure 14 It is a schematic diagram of the structure after splicing two Figure 13 thermal insulation modules shown in the second direction.

[0055] Figure 15 It is a schematic diagram of the state where the first part of the thermal insulation module shrinks in place.

[0056] Figure 16 It is a schematic diagram of the structure after splicing two Figure 13 thermal insulation modules shown in the third direction.

[0057] Figure 17 This is a sectional view of a thermal insulation module provided by an embodiment of the present application.

[0058] Among them, the reference numerals are:

[0059] 1. Outer tank; 11. Tank wall; 12. Tank bottom; 2. Thermal insulation module; 3. Through-type splicing seam;

[0060] 2A. First thermal insulation module; 2B. Second thermal insulation module; 2C. Third thermal insulation module; 21. First support plate; 22. Second support plate; 23. Thermal insulation layer; 231. First part; 232. Second part; 2311. Right-angled step; 2312. Teeth; 2313. Gap; L1. Solid line; L2. Dashed line; 23A. Main body material; 23B. Sealing material;

[0061] 2F1. First splicing seam; 2F2. Second splicing seam; 2F3. Third splicing seam; 2F4. Fourth splicing seam;

[0062] D1. First direction; D2. Second direction; D3. Third direction. Detailed implementation manners

[0063] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in the present application belong to the scope of protection of the present application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the drawings are intended to cover non-exclusive inclusion.

[0065] Referring to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0066] In addition, the terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order, and may explicitly or implicitly include one or more of such features.

[0067] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, the "connection" or "coupling" of a mechanical structure may refer to a physical connection. For example, a physical connection may be a fixed connection, such as a fixed connection through a spacer, such as a fixed connection through screws, bolts, or other spacers. A physical connection may also be a detachable connection, such as a snap connection or a snap-fit connection. A physical connection may also be an integral connection, such as a connection formed by welding, bonding, or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] The following provides a detailed description of this application with reference to the accompanying drawings.

[0069] Figure 1 is a schematic structural diagram of the outer tank of a land-based cryogenic liquid storage tank. Figure 2 is a schematic diagram of the laying state of the thermal insulation module at the tank wall of an existing cryogenic liquid storage tank. Figure 3 is a schematic diagram of the laying state of the thermal insulation module at the bottom of an existing cryogenic liquid storage tank.

[0070] Please refer to Figures 1 to 3 , the outer tank 1 of the land-based cryogenic liquid storage tank is generally cylindrical and is cast from a concrete material. In order to improve the cold insulation performance of the cryogenic liquid storage tank, a thermal insulation module 2 is laid on the inner surface of the outer tank 1. As can be seen from Figure 2 and Figure 3 , in the prior art, whether at the tank wall 11 or at the tank bottom 12, there is a through-type splicing seam 3 between adjacent thermal insulation modules 2, and along the thickness direction of the tank wall 11 or the tank bottom 12, this through-type splicing seam 3 is likely to become a cold leakage channel.

[0071] In order to reduce cold leakage, in the prior art, usually after the thermal insulation module 2 is laid, an elastic felt is stuffed at the through-type splicing seam 3. This treatment method will generate additional construction work, and there will be a phenomenon that the through-type splicing seam 3 is not fully filled. In addition, when the thermal insulation module 2 shrinks at low temperature, the original gap will expand, resulting in cold leakage between the elastic felt and the thermal insulation module 2 again.

[0072] In view of this, this application provides a thermal insulation module. Figure 4 is a schematic structural diagram of a thermal insulation module provided by an embodiment of this application. Figure 5 is for Figure 4Front view. Please refer to Figure 4 and Figure 5 The adiabatic module 2 provided by the present application includes a first support plate 21, a second support plate 22 and an adiabatic layer 23.

[0073] Along the first direction D1, the first support plate 21 and the second support plate 22 are oppositely arranged. The adiabatic layer 23 is divided into a first part 231 and a second part 232. The first part 231 is the part of the adiabatic layer 23 close to the first support plate 21. The first support plate 21 covers the surface of the first part 231 away from the second part 232. The second part 232 is the part of the adiabatic layer 23 close to the second support plate 22. The second support plate 22 covers the surface of the second part 232 away from the first part 231.

[0074] Along the second direction D2, the adiabatic module 2 has a first splicing side and a second splicing side, and the first splicing side and the second splicing side are opposite sides of the adiabatic module 2. And on the first splicing side and the second splicing side, the first part 231 has an extra part relative to the second part 232, and the extra part forms a right-angled step 2311. The part where the second part 232 is missing relative to the first part 231 forms a right-angled groove.

[0075] Figure 6 For Figure 4 the schematic structural diagram of the splicing of two adiabatic modules 2 shown in the figure, please refer to Figure 4 , Figure 5 and Figure 6 When two adiabatic modules 2 are spliced along the second direction D2, one of the adiabatic modules 2 is denoted as the first adiabatic module 2A, and the other adiabatic module 2 is denoted as the second adiabatic module 2B. The first support plate 21 of the first adiabatic module 2A can be spliced with the second support plate 22 of the second adiabatic module 2B. The second support plate 22 of the first adiabatic module 2A can be spliced with the first support plate 21 of the second adiabatic module 2B. The right-angled step 2311 of the first part 231 of the first adiabatic module 2A fills the right-angled groove of the second part 232 of the second adiabatic module 2B. The right-angled groove of the second part 232 of the first adiabatic module 2A is filled by the right-angled step 2311 of the first part 231 of the second adiabatic module 2B. The first direction D1 is perpendicular to the second direction D2.

[0076] Specifically, when the adiabatic module 2 provided by the present application is used for laying the tank wall or the tank bottom, the following beneficial effects will be brought:

[0077] First: Reduce the cold leakage.

[0078] Please refer to Figure 3, in the prior art, two adjacent insulation modules 2 are linearly spliced. When splicing, there is a splicing gap between two adjacent insulation modules 2, and this splicing gap is a through-type splicing seam 3, which is prone to cold leakage. When a cryogenic liquid storage tank stores cryogenic liquid, the edges of the two insulation modules 2 will shrink towards their respective centers, and the size of this through-type splicing seam 3 will be further enlarged. Thus, the cold leakage amount is greater. Even if some felts are stuffed at the through-type splicing seam 3, the felts will also be affected by thermal expansion and contraction, and there will still be a gap between the felts and the insulation module 2.

[0079] Please refer to Figures 4 to 6 , when using the insulation module 2 of the present application for laying on the tank wall or tank bottom, the first support plate 21 of the first insulation module 2A is close to the inner surface of the outer tank, and the second support plate 22 of the second insulation module 2B is close to the inner surface of the outer tank. After two adjacent insulation modules 2 are spliced along the second direction D2, a first splicing seam 2F1 is generated between the second support plate 22 of the first insulation module 2A and the first support plate 21 of the second insulation module 2B, a second splicing seam 2F2 is generated between the second part 232 of the first insulation module 2A and the first part 231 of the second insulation module 2B, a third splicing seam 2F3 is generated between the first support plate 21 of the first insulation module 2A and the second support plate 22 of the second insulation module 2B, and a fourth splicing seam 2F4 is generated between the first part 231 of the first insulation module 2A and the second part 232 of the second insulation module 2B.

[0080] Combined with Figures 4 to 6 , the first splicing seam 2F1 and the second splicing seam 2F2 are opposite to the right-angled step 2311 of the first insulation module 2A. Then, during the cold quantity flow process, the right-angled step 2311 can intercept the cold quantity from these two splicing seams and hinder its circulation. The remaining cold quantity after interception needs to be transmitted to the outer tank through the step surface, the third splicing seam 2F3 and the fourth splicing seam 2F4. Thus, when the insulation module 2 of the present application is used for laying on the inner surface of the outer tank, it can hinder the circulation of cold quantity, increase the circulation path of cold quantity, and slow down the cold leakage speed.

[0081] Second: Reduce the inflow of external heat

[0082] Cryogenic liquids in a cryogenic liquid storage tank, such as liquefied natural gas LNG, liquid nitrogen, liquid oxygen, etc., have a relatively low liquefaction temperature, around -200°C. The external temperature of the cryogenic liquid storage tank is generally above 0°C. Therefore, there is a large temperature difference between the inside and outside of the cryogenic liquid storage tank. In order to maintain the temperature of the liquid in the tank and reduce the daily evaporation amount, on the one hand, it is necessary to prevent the cold quantity inside the tank from leaking out, and on the other hand, it is necessary to prevent the external heat from entering.

[0083] Please refer to Figure 3, in the prior art, the through-type splicing seam 3 generated after splicing two adjacent heat insulation modules 2 has no ability to intercept the heat transmitted from the outside into the tank, and heat leakage is likely to occur.

[0084] Please refer to Figures 4 to 6 , in this application, when external heat flows into the low-temperature liquid storage tank, the third splicing seam 2F3 and the fourth splicing seam 2F4 are facing the right-angled step 2311 of the second heat insulation module 2B. The right-angled step 2311 intercepts the heat from these two splicing seams and hinders its flow. The remaining heat after interception needs to enter the tank through the step surface, the first splicing seam 2F1 and the second splicing seam 2F2. In this way, the heat flow path is increased, thereby slowing down the inflow speed of the residual heat.

[0085] Third, improve the installation convenience

[0086] The geometric matching between the right-angled step 2311 and the right-angled groove provides a self-guiding positioning function for two adjacent heat insulation modules 2, which can improve the installation efficiency.

[0087] It should be noted that in this application, the materials of the first support plate 21 and the second support plate 22 can be selected from any one of plywood, polytetrafluoroethylene, polyether ether ketone or fiberglass. The main material of the heat insulation layer 23 can be selected from at least one of polymer foams, nanoporous materials, fiber-reinforced composite materials or multi-layer composite heat insulation systems, preferably polyimide foam, aerogel composite felt or modified polyurethane foam.

[0088] Figure 7 For Figure 4 the schematic structural diagram of the splicing of two heat insulation modules in the third direction as shown. Please refer to Figure 4 , Figure 5 and Figure 7 , along the third direction D3, the heat insulation module 2 has a third splicing side and a fourth splicing side, and the third splicing side and the fourth splicing side are opposite sides of the heat insulation module 2. And on the third splicing side and the fourth splicing side, the first part 231 has a right-angled step 2311 that protrudes more than the second part 232, and the part where the second part 232 is missing relative to the first part 231 forms a right-angled groove.

[0089] The right-angled steps 2311 on the first splicing side, the second splicing side, the third splicing side and the fourth splicing side are connected, and the right-angled grooves on the first splicing side, the second splicing side, the third splicing side and the fourth splicing side are connected.

[0090] When two adiabatic modules 2 are joined together along the third direction D3, one of the adiabatic modules 2 is denoted as the first adiabatic module 2A, and the other adiabatic module 2 is denoted as the third adiabatic module 2C. The first support plate 21 of the first adiabatic module 2A can be joined with the second support plate 22 of the third adiabatic module 2C, and the second support plate 22 of the first adiabatic module 2A can be joined with the first support plate 21 of the third adiabatic module 2C. The right-angled step 2311 of the first part 231 of the first adiabatic module 2A fills the right-angled groove of the second part 232 of the third adiabatic module 2C, and the right-angled groove of the second part 232 of the first adiabatic module 2A is filled by the right-angled step 2311 of the first part 231 of the third adiabatic module 2C. The first direction D1, the second direction D2, and the third direction D3 are perpendicular to each other.

[0091] In this way, the splicing structure of the adiabatic module 2 in the third direction D3 is similar to the splicing structure of the adiabatic module 2 in the second direction D2. Then, when using the adiabatic module 2 provided by this embodiment to lay the tank wall and the tank bottom, the splicing structure formed by two adjacent adiabatic modules 2 along the third direction D3 also has the characteristics of reducing the cold leakage and reducing the inflow of external heat.

[0092] Figure 8 For Figure 4 the structural schematic diagram of laying the tank bottom using the adiabatic module shown, please refer to Figures 4 to 8 , in some embodiments of the present application, the first support plate 21 is a rectangular plate with chamfered corners. The second support plate 22 is a rectangular plate with right-angled corners. The shape of the first part 231 is adapted to the first support plate 21, and the shape of the second part 232 is adapted to the second support plate 22.

[0093] The first support plate 21 is a rectangular plate with chamfered corners, which can avoid interference when two adjacent adiabatic modules 2 are joined. In this way, when multiple adiabatic modules 2 are used for laying the tank bottom or the tank wall, whether it is two adjacent adiabatic modules 2 in the second direction D2 or two adjacent adiabatic modules 2 in the third direction D3, perfect joining can be achieved, which helps to reduce cold leakage and heat inflow.

[0094] Figure 9 This is a three-dimensional structure diagram of another shape of the adiabatic module provided by the embodiment of the present application. Figure 10 For Figure 9 the front view. Please refer to Figure 9 and Figure 10, in some embodiments of the present application, the first support plate 21 is a rectangular plate with chamfered corners after being bent, and the bending line is parallel to the edge of the first support plate 21. The second support plate 22 is a rectangular plate with right-angled corners after being bent, and the bending line is parallel to the edge of the second support plate 22. The shape of the first part 231 is adapted to the first support plate 21, and the shape of the second part 232 is adapted to the second support plate 22.

[0095] Specifically, please refer to Figure 1 , the inner surface of the tank wall 11 of the outer tank 1 of the cryogenic liquid storage tank is a polyhedral surface, and there is an included angle between two adjacent prism surfaces. In order to adapt to the shape of the tank wall 11, the adiabatic module 2 with the structure shown in Figure 9 can be laid at the edges of the tank wall 11.

[0096] Figure 11 is Figure 4 the schematic structural diagram of the splicing of the adiabatic module shown in Figure 9 and the adiabatic module shown in Figure 4 , Figure 9 and Figure 11 , in some embodiments of the present application, the adiabatic module 2 shown in Figure 4 can be spliced with the adiabatic module 2 shown in Figure 9 . Denote the adiabatic module 2 shown in Figure 4 as the first adiabatic module 2A, and denote the adiabatic module 2 shown in Figure 9 as the second adiabatic module 2B. The first support plate 21 of the first adiabatic module 2A is the part of the first adiabatic module 2A close to the tank wall, and the second support plate 22 of the second adiabatic module 2B is the part of the second adiabatic module 2B close to the tank wall. Then, after splicing, a first splicing seam 2F1 is generated between the second support plate 22 of the first adiabatic module 2A and the first support plate 21 of the second adiabatic module 2B, a second splicing seam 2F2 is generated between the second part 232 of the first adiabatic module 2A and the first part 231 of the second adiabatic module 2B, a third splicing seam is generated between the first support plate 21 of the first adiabatic module 2A and the second support plate 22 of the second adiabatic module 2B, and a fourth splicing seam is generated between the first part 231 of the first adiabatic module 2A and the second part 232 of the second adiabatic module 2B.

[0097] Please refer to Figure 4 , Figure 9 and Figure 11, the first splicing seam 2F1 and the second splicing seam 2F2 face the right-angled step 2311 of the first insulation module 2A. During the cold quantity flow process, the right-angled step 2311 intercepts the cold quantity from these two splicing seams and hinders its circulation. The remaining cold quantity after interception needs to be transmitted to the outer tank through the step surface, the third splicing seam and the fourth splicing seam, increasing the cold quantity circulation path, thereby slowing down the leakage speed of the residual cold quantity.

[0098] The third splicing seam and the fourth splicing seam face the right-angled step 2311 of the second insulation module 2B. During the heat quantity flow process, the right-angled step 2311 intercepts the heat quantity from these two splicing seams and hinders its circulation. The remaining heat quantity after interception needs to be introduced into the tank through the step surface, the first splicing seam 2F1 and the second splicing seam 2F2. In this way, the heat quantity circulation path is increased, thereby slowing down the inflow speed of the residual heat quantity.

[0099] Figure 12 For Figure 4 and Figure 9 the structural schematic diagram of laying the tank wall with the insulation module 2 as shown, please refer to Figure 4 , Figure 5 , Figure 7 , Figure 9 , Figure 10 , Figure 11 and Figure 12 . When laying the tank wall 11 of the outer tank 1, along the circumferential direction of the tank wall 11, the insulation module 2 with the structure shown in Figure 9 can be laid at the corners of the tank wall 11, and the insulation module 2 with the structure shown in Figure 4 can be laid in the plane area between two corners. Figure 9 The bending angle of the structure shown can be determined according to the included angle between two adjacent wall surfaces on the tank wall 11. In this way, along the circumferential direction of the tank wall 11, the tank wall laid by the splicing combination of Figure 4 and Figure 9 the insulation module 2 shown has reduced cold leakage and reduced heat infiltration.

[0100] Figure 13 This is the structural schematic diagram of another insulation module provided by the embodiment of the present application. Figure 14 For Figure 13 the structural schematic diagram of the two insulation modules shown after splicing in the second direction, please refer to Figure 13 and Figure 14, in some embodiments of the present application, on the first splicing side and the second splicing side, teeth 2312 are provided on the right-angled step 2311. And when two adiabatic modules 2 are spliced along the second direction D2, there is a gap 2313 between the teeth 2312 of the first adiabatic module 2A and the teeth 2312 of the second adiabatic module 2B. After the first adiabatic module 2A and the second adiabatic module 2B contract in place, the teeth 2312 of the first adiabatic module 2A are in contact with the teeth 2312 of the second adiabatic module 2B.

[0101] Figure 15 For the schematic diagram of the state where the first part of the adiabatic module contracts in place, please refer to Figure 15 , when cryogenic liquid is injected into the cryogenic liquid storage tank, the adiabatic module 2 of the cryogenic liquid storage tank is affected by the cryogenic environment, and the adiabatic module 2 will contract towards its center. Figure 15 In [reference], the solid line L1 represents the contour line of the first part 231 of the adiabatic module 2 before contraction. Figure 15 In [reference], the dashed line L2 represents the contour line of the first part 231 of the adiabatic module 2 after contraction.

[0102] Please refer to Figure 14 and Figure 15 , when cryogenic liquid is injected into the cryogenic liquid storage tank, the first adiabatic module 2A contracts in a direction away from the second adiabatic module 2B, and the second adiabatic module 2B contracts in a direction away from the first adiabatic module 2A. Thus, the first splicing seam 2F1, the second splicing seam 2F2, the third splicing seam 2F3, and the fourth splicing seam 2F4 will widen.

[0103] In some embodiments of the present application, on the first splicing side and the second splicing side, teeth 2312 are provided on the right-angled step 2311 of the adiabatic module 2. When two adiabatic modules 2 are spliced along the second direction D2, there is a gap 2313 between the teeth 2312 of the first adiabatic module 2A and the teeth 2312 of the second adiabatic module 2B. After the first adiabatic module 2A and the second adiabatic module 2B contract in place, the teeth 2312 of the first adiabatic module 2A are in contact with the teeth 2312 of the second adiabatic module 2B. Thus, in the second direction D2, the contact between the teeth 2312 forms another barrier against cold leakage and heat infiltration, which helps to exert the cold insulation effect of the heat insulation layer 23.

[0104] Figure 16 For Figure 13 the schematic structural diagram of the two adiabatic modules shown after splicing in the third direction, please continue to refer to Figure 13 , Figure 15 and Figure 16, in some embodiments of the present application, on the third splicing side and the fourth splicing side, teeth 2312 are provided on the right-angled step 2311. When two heat insulation modules 2 are spliced along the third direction D3, there is a gap 2313 between the teeth 2312 of the first heat insulation module 2A and the teeth 2312 of the third heat insulation module 2C, and after the first heat insulation module 2A and the third heat insulation module 2C shrink in place, the teeth 2312 of the first heat insulation module 2A are in contact with the teeth 2312 of the third heat insulation module 2C.

[0105] The purpose and effect of providing teeth 2312 on the right-angled step 2311 on the third splicing side and the fourth splicing side are similar to those of providing teeth 2312 on the first splicing side and the second splicing side, and will not be described in detail here.

[0106] Please continue to refer to Figures 13 to 16 , in some embodiments of the present application, the teeth 2312 are thinner from the root to the top.

[0107] Specifically, affected by the installation position tolerance of the heat insulation module 2, the gap 2313 between two mating teeth 2312 may be greater than or less than the predetermined gap. When the gap 2313 between two teeth 2312 is greater than the predetermined gap, after two adjacent heat insulation modules 2 shrink in place, the two teeth 2312 may not be in contact, but since the teeth 2312 are still on the cold or heat flow path, they can still play a certain role in blocking cold or heat.

[0108] However, when the gap 2313 between two mating teeth 2312 is less than the predetermined gap, due to the shrinkage of the heat insulation module 2, the teeth 2312 tear each other, and the heat insulation module 2 is easily damaged. In view of this, in the present application, the teeth 2312 are thinner from the root to the top, giving the teeth 2312 a certain flexibility. In this way, when two adjacent heat insulation modules 2 shrink and squeeze in opposite directions, the teeth 2312 are deformed, which can avoid the damage of the teeth 2312 to a certain extent, and thus avoid the damage of the heat insulation module 2.

[0109] Figure 17 For the sectional view of a heat insulation module provided by an embodiment of the present application, please refer to Figure 17 , in some embodiments of the present application, the heat insulation layer 23 includes a main material 23A and a sealing material 23B, and the sealing material 23B surrounds the main material 23A along the direction from the first splicing side, the second splicing side, the third splicing side to the fourth splicing side.

[0110] Specifically, please continue to refer to Figure 17, the main body material 23A is the main cold insulation material of the insulation module 2. Generally, materials such as polyimide foam are selected as the main body material 23A, and these materials usually have pores. In this application, a sealing material 23B is arranged around the main body material 23A along the first splicing side, the second splicing side, the third splicing side to the fourth splicing side. In this way, cold air can be blocked from diffusing into the main body material 23A from the first splicing side, the second splicing side, the third splicing side to the fourth splicing side, thereby playing a better cold insulation role.

[0111] Please continue to refer to Figure 17 , in some embodiments of this application, the sealing material 23B includes aluminum foil and glass wool layers covering both sides of the aluminum foil.

[0112] Please combine with Figure 6 , Figure 7 , Figure 8 , Figure 11 , Figure 12 , Figure 14 , Figure 16 and Figure 17 , specifically, in some embodiments of this application, the aluminum foil in the sealing material 23B has a high reflectivity (≥95%), which significantly reduces radiative heat transfer in a low-temperature environment. The glass wool layers on both sides of the aluminum foil can inhibit the movement of gas molecules through the fiber porous structure, blocking heat conduction and convective heat transfer. In this way, a good cold insulation effect can be achieved.

[0113] In addition, due to the porous structure of the glass wool layer, the sealing material 23B has a certain compressibility. In this way, it is convenient for the installation of the insulation module 2 and can fill the gap between two insulation modules 2, reducing the cold bridge effect caused by construction joints.

[0114] Based on the same inventive concept, this application also provides a cryogenic liquid storage tank, including an outer tank and an insulation barrier. The insulation barrier is laid along the inner wall of the outer tank, and the insulation barrier includes any one of the above-mentioned insulation modules.

[0115] Specifically, the cryogenic liquid storage tank of this application can be a land tank or a marine cryogenic liquid storage tank. When the cryogenic liquid storage tank is a land tank, the outer tank can be a concrete cement tank. When the cryogenic liquid storage tank is a marine cryogenic liquid storage tank, the outer tank can also be an assembly cavity provided on the ship.

[0116] The cryogenic liquid storage tank of this application includes the insulation module provided by this application, so it also has the beneficial effects brought by the insulation module, which will not be elaborated here.

[0117] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments is meant to be within the scope of this application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0118] As described above, the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An adiabatic module, characterized in that, It includes a first support plate, a second support plate and a heat insulation layer; Along the first direction, the first support plate and the second support plate are arranged opposite to each other. The heat insulation layer is divided into a first part and a second part. The first part is the part of the heat insulation layer close to the first support plate. The first support plate covers the surface of the first part away from the second part. The second part is the part of the heat insulation layer close to the second support plate. The second support plate covers the surface of the second part away from the first part; Along the second direction, the heat insulation module has a first splicing side and a second splicing side. The first splicing side and the second splicing side are opposite sides of the heat insulation module. And at the first splicing side and the second splicing side, the first part has an extra part relative to the second part, and the extra part forms a right-angled step. The dimension of the right-angled step along the second direction is greater than the shrinkage dimension of the single side of the heat insulation layer in the second direction. The part where the second part is missing relative to the first part forms a right-angled groove; When two heat insulation modules are spliced along the second direction, one heat insulation module is denoted as the first heat insulation module, and the other heat insulation module is denoted as the second heat insulation module. The first support plate of the first heat insulation module can be spliced with the second support plate of the second heat insulation module. The second support plate of the first heat insulation module can be spliced with the first support plate of the second heat insulation module. The right-angled step of the first part of the first heat insulation module fills the right-angled groove of the second part of the second heat insulation module. The right-angled groove of the second part of the first heat insulation module is filled by the right-angled step of the first part of the second heat insulation module; Along the third direction, the heat insulation module has a third splicing side and a fourth splicing side. The third splicing side and the fourth splicing side are opposite sides of the heat insulation module. And at the third splicing side and the fourth splicing side, the first part has a right-angled step that is extra relative to the second part. The part where the second part is missing relative to the first part forms a right-angled groove; The right-angled steps on the first splicing side, the second splicing side, the third splicing side and the fourth splicing side are connected. The right-angled grooves on the first splicing side, the second splicing side, the third splicing side and the fourth splicing side are connected; On the first splicing side and the second splicing side, teeth are arranged on the right-angled step. When two heat insulation modules are spliced along the second direction, there is a gap between the teeth of the first heat insulation module and the teeth of the second heat insulation module. And after the first heat insulation module and the second heat insulation module shrink in place, the teeth of the first heat insulation module are in contact with the teeth of the second heat insulation module; Among them, the first support plate is a rectangular plate with chamfered corners; The second support plate is a rectangular plate with right-angled corners; The shape of the first part is adapted to the first support plate, and the shape of the second part is adapted to the second support plate; Or, the first support plate is a rectangular plate with chamfered corners that has been bent, and the bending line is parallel to the edge of the first support plate; The second support plate is a rectangular plate with right-angled corners after being bent, and the folding line is parallel to the edge of the second support plate; The shape of the first part is adapted to the first support plate, and the shape of the second part is adapted to the second support plate; The first direction, the second direction and the third direction are perpendicular to each other.

2. The thermal insulation module according to claim 1, wherein When two such thermal insulation modules are spliced along the third direction, one of the thermal insulation modules is denoted as the first thermal insulation module, and the other thermal insulation module is denoted as the third thermal insulation module. The first support plate of the first thermal insulation module can be spliced with the second support plate of the third thermal insulation module, the second support plate of the first thermal insulation module can be spliced with the first support plate of the third thermal insulation module, the right-angled step of the first part of the first thermal insulation module fills the right-angled groove of the second part of the third thermal insulation module, and the right-angled groove of the second part of the first thermal insulation module is filled by the right-angled step of the first part of the third thermal insulation module.

3. The adiabatic module according to claim 2, characterized in that, On the third splicing side and the fourth splicing side, teeth are provided on the right-angled step; when two such thermal insulation modules are spliced along the third direction, there is a gap between the teeth of the first thermal insulation module and the teeth of the third thermal insulation module, and after the first thermal insulation module and the third thermal insulation module shrink in place, the teeth of the first thermal insulation module are in contact with the teeth of the third thermal insulation module.

4. The adiabatic module according to claim 3, characterized in that The teeth are thinned from the root to the top.

5. The adiabatic module according to claim 2, characterized in that The thermal insulation layer includes a main material and a sealing material. Along the direction from the first splicing side, the second splicing side, the third splicing side to the fourth splicing side, the sealing material surrounds the main material.

6. The adiabatic module according to claim 5, characterized in that, The sealing material includes aluminum foil and glass wool layers covering both sides of the aluminum foil.

7. A cryogenic liquid storage tank, characterized in that, It includes an outer tank and a thermal insulation barrier. The thermal insulation barrier is laid along the inner wall of the outer tank, and the thermal insulation barrier includes the thermal insulation module according to any one of claims 1 to 6.

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