A thin film type enclosure system

Abstract

The application discloses a kind of film type enclosure systems, from inside to outside in turn include main shielding layer, main insulation layer, secondary shielding layer and secondary insulation layer, main shielding layer in main corrugated board has first wave spacing;First fixed anchoring strip and first sliding anchoring strip are set on main insulation box in main insulation layer;Secondary corrugated board has second wave spacing in secondary shielding layer, second wave spacing is greater than or equal to first wave spacing;Second fixed anchoring strip and second anchoring strip are set on secondary insulation box in secondary insulation layer, point anchoring connecting piece is also set on secondary insulation box, and main insulation box is installed in the inside of secondary corrugated board by point anchoring connecting piece.The application can be freely stretched along a specific direction when corrugated board shrinks at low temperature by the mixed arrangement of fixed anchoring strip and sliding anchoring strip and the fixed-point connection of point anchoring connecting piece, realize the uniform distribution of deformation of each region, effectively reduce thermal stress concentration, improve the sealing reliability and service life of enclosure system.

Description

Technical Field

[0001] This invention relates to the field of liquid cargo membrane storage tank technology, and more specifically to a membrane-type enclosure system. Background Technology

[0002] The storage and transportation of liquefied gases such as liquefied natural gas (LNG) typically employs membrane-type storage tanks. The membrane-type enclosure system is its core structure, consisting of a secondary insulation layer, a secondary shielding layer, a primary insulation layer, and a primary shielding layer, arranged sequentially from the outside in. Both the secondary and primary shielding layers are constructed by splicing and welding corrugated metal plates. These corrugated plates are fixed to the insulation layer via an anchoring system, jointly providing sealing, heat insulation, and structural support.

[0003] When membrane-type storage tanks are filled with cryogenic liquefied gases, the corrugated metal plates undergo drastic temperature changes from room temperature to extremely low temperatures (approximately -162°C) and are subjected to cyclic thermal expansion and contraction loads during repeated filling and unloading. To accommodate this low-temperature contraction deformation, the corrugated plates are typically designed with corrugations in both longitudinal and transverse directions, relying on the deformation of the corrugations to absorb thermal stress.

[0004] However, in existing technologies, the anchoring strips used to connect the corrugated sheet and the insulation layer are usually all fixed anchoring strips, and the constraints on the corrugated sheet in all directions are rigid constraints. In this case, when the corrugated sheet shrinks due to low temperature, the deformation in all directions is equally constrained by the fixed anchoring strips, and the corrugated sheet cannot extend freely in a specific direction. This results in a deviation between the actual expansion and contraction of the corrugated sheet in different areas and the theoretical deformation, and poor overall deformation coordination.

[0005] Especially when the tank wall area is large and the corrugated plate spans multiple anchoring areas, the thermal stress inside the corrugated plate cannot be fully released due to the constraints imposed by the fixed anchoring strips in all directions. This results in some areas of excessive compression or stretching of the corrugated plate, while other areas experience insufficient deformation, leading to uneven expansion of the corrugated plate. Under prolonged cyclic thermal loads, stress concentration areas are prone to fatigue damage and even cracking, seriously threatening the sealing safety and service life of the tank.

[0006] Therefore, the existing membrane-type enclosure system's anchoring structure lacks reasonable guidance for the deformation direction of the corrugated plate. There is an urgent need to improve the type and arrangement of the anchoring strips so that the corrugated plate can freely expand and contract in a specific direction, thereby achieving a uniform distribution of deformation in each area and improving the reliability and service life of the enclosure system. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a membrane-type enclosure system that allows the corrugated plate to freely expand and contract in a specific direction, so as to achieve a uniform distribution of deformation in each area and avoid uneven deformation and thermal stress concentration of the corrugated plate when shrinking at low temperature, which would lead to fatigue damage and sealing failure.

[0008] To address the aforementioned technical problems, the present invention provides a membrane-type enclosure system, comprising, from the inside out:

[0009] The main shielding layer is formed by splicing together several main corrugated plates. The main corrugated plates are provided with first corrugations and second corrugations that are perpendicular to each other. There is a first wave spacing between the first corrugations and the second corrugations. The first width and the first length of the main corrugated plates are both integer multiples of the first wave spacing.

[0010] The main insulation layer is provided with a first fixed anchoring strip corresponding to the apex of the main corrugated plate and a first sliding anchoring strip corresponding to the side of the main corrugated plate. The main insulation layer is formed by splicing together several main insulation boxes. The first fixed anchoring strip and the first sliding anchoring strip are set at corresponding positions of the main insulation boxes. The outer periphery of the main corrugated plate is fixedly connected to the main insulation box through the first fixed anchoring strip and the first sliding anchoring strip.

[0011] The secondary shielding layer is formed by splicing together several secondary corrugated plates. The secondary corrugated plates are provided with mutually perpendicular third and fourth corrugations. There is a second wave spacing between the third and fourth corrugations. The second wave spacing is greater than or equal to the first wave spacing. The third width and third length of the secondary corrugated plates are integer multiples of the second wave spacing.

[0012] The secondary insulation layer is provided with a second fixing anchor strip corresponding to the apex of the secondary corrugated plate and a second anchor strip corresponding to the side of the secondary corrugated plate. The secondary insulation layer is formed by splicing together several secondary insulation boxes. The second fixing anchor strip and the second anchor strip are provided at corresponding positions of the secondary insulation boxes. The outer periphery of the secondary corrugated plate is fixedly connected to the secondary insulation box through the second fixing anchor strip and the second anchor strip.

[0013] The second width and second length of the main insulation box and the fourth width and fourth length of the secondary insulation box are integer multiples of the common multiple of the first wave pitch and the second wave pitch. A point anchoring connector is provided on the secondary insulation box corresponding to the center of the second fixed anchoring strip or the center of the square formed by the third and fourth waves on the secondary corrugated plate. The main insulation box is installed on the inner side of the secondary corrugated plate through the point anchoring connector.

[0014] Furthermore, the second width and the second length are equal, and the fourth length is an integer multiple of the fourth width.

[0015] Furthermore, the point anchoring connectors are set at the four corners of the main insulation box.

[0016] Furthermore, the apex corner of the main insulation box is offset from the apex corner of the secondary insulation box.

[0017] Furthermore, the center of the first fixed anchor strip is located at the center of a square with the second width as its side length at the end of the main insulation box, the center of the second fixed anchor strip is located at the center of a square with the fourth width as its side length on the secondary insulation box, and the center of the point anchor connector coincides with the center of the second fixed anchor strip.

[0018] Furthermore, on the main insulation layer and the secondary insulation layer, a third fixed anchoring strip and a fourth fixed anchoring strip are set at positions corresponding to integer multiples of the first width or the third width on the long side of the main corrugated plate and the secondary corrugated plate, respectively, and the point anchoring connector is also provided at the center of the fourth fixed anchoring strip.

[0019] Furthermore, the second fixed anchoring strip has a receiving hole for accommodating the point anchoring connector.

[0020] Furthermore, the point anchoring connector is located at the center of the secondary insulation box, and multiple second fixing anchoring strips extend along the outer side of the point anchoring connector towards the side length direction of the secondary insulation box.

[0021] Furthermore, the main insulation box is divided into multiple first units based on the first wave pitch, and the center of the first fixed anchor bar is set corresponding to the center of any first unit. The secondary insulation box is divided into multiple second units based on the second wave pitch, and the center of the second fixed anchor bar is set corresponding to the center of any second unit. The point anchor connector is located at the center of other second units and is set corresponding to the center of the square formed by the third and fourth waves on the secondary corrugated plate.

[0022] Furthermore, the second anchoring strip is a second sliding anchoring strip.

[0023] Furthermore, both the main insulation box and the secondary insulation box include a lower plywood, a polyurethane layer, and an upper plywood. The upper plywood is provided with a fixed anchor groove and a sliding anchor groove. The first fixed anchor strip and the second fixed anchor strip are disposed in the fixed anchor groove, and the first sliding anchor strip is installed in the sliding anchor groove through a sliding structure.

[0024] Furthermore, the fixed anchor groove is in communication with the sliding anchor groove.

[0025] Furthermore, the main corrugated plate is spot-welded to the first fixed anchor strip and the first sliding anchor strip, respectively, and the secondary corrugated plate is spot-welded to the second fixed anchor strip and the second anchor strip, respectively.

[0026] Furthermore, expansion joints are provided on the main insulation box at positions corresponding to the first and second corrugations.

[0027] Furthermore, the expansion joint extends in the depth direction to the middle of the polyurethane layer of the main insulation box, and the expansion joint is continuous in the horizontal direction.

[0028] Furthermore, the third and fourth corrugations are each provided with a protrusion, a recess, and a connecting portion in the extending direction. The connecting portion connects the protrusion and the recess together. The protrusion protrudes towards the main insulating layer, and the recess protrudes towards the secondary insulating layer. A first receiving groove for accommodating the recess is formed on the secondary insulating layer, and a second receiving groove for accommodating the protrusion is formed on the main insulating layer.

[0029] Furthermore, the first and second corrugations protrude in a direction away from the main insulating layer.

[0030] Furthermore, the height of the first corrugation is greater than the height of the second corrugation, the height of the third corrugation is greater than the height of the fourth corrugation, and the first and third corrugations are arranged along a direction perpendicular to the length of the containment system, which is the length of the ship.

[0031] Furthermore, the point anchoring connector comprises, from bottom to top:

[0032] The lower connecting plate is embedded in the secondary insulation box;

[0033] A stud, which is fixedly connected to the lower connecting plate;

[0034] Upper pressure plate, which is sleeved on the stud;

[0035] Nut, which is threaded onto the top of the stud;

[0036] The secondary corrugated plate is continuously welded and sealed to the lower connecting plate. The lower connecting plate and the upper pressure plate press the secondary corrugated plate together with the lower plywood of the main insulation box. The nut locks the upper pressure plate.

[0037] Furthermore, the secondary corrugated plate is provided with a clearance opening to avoid the stud.

[0038] Furthermore, the lower connecting plate has a recessed pit at its center facing the secondary insulation box, and the recess is circumferentially threaded, with the stud screwed onto the lower connecting plate by the thread.

[0039] Furthermore, the stud is welded to the lower connecting plate.

[0040] Furthermore, one of the studs is provided at the center of the lower connecting plate.

[0041] Furthermore, the number of studs, upper pressure plates, and nuts corresponds to the number of the main insulation boxes above.

[0042] The beneficial effects of this invention are:

[0043] (1) By mixing fixed anchor strips and sliding anchor strips on the insulation box, the corrugated plate can slide freely along the side direction while maintaining rigid positioning at the apex, thus realizing the directional guidance and uniform distribution of the deformation of the main shielding layer, effectively reducing the degree of thermal stress concentration in the main corrugated plate.

[0044] (2) By introducing point anchoring connectors on the secondary insulation box, the coordination of multi-point precise positioning and free expansion and contraction of the secondary corrugated plate is realized, which fully ensures the deformation uniformity and sealing reliability of the secondary shielding layer under cyclic thermal load. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0046] Figure 2 This is an exploded view of Embodiment 1 of the present invention;

[0047] Figure 3 This is a schematic diagram of the main corrugated plate structure in Embodiment 1 of the present invention;

[0048] Figure 4 This is a schematic diagram of the main insulation box structure in Embodiment 1 of the present invention;

[0049] Figure 5 This is a schematic diagram of the secondary corrugated plate structure in Embodiment 1 of the present invention;

[0050] Figure 6 This is a schematic diagram of the secondary insulation box structure in Embodiment 1 of the present invention;

[0051] Figure 7 This is a schematic diagram of an embodiment of the point anchoring connector of the present invention;

[0052] Figure 8 This is a schematic diagram of an embodiment of the point anchoring connector and anchoring groove of the present invention;

[0053] Figure 9 This is a schematic diagram of another embodiment of the point anchoring connector and anchoring groove of the present invention;

[0054] Figure 10 This is an exploded view of Embodiment 3 of the present invention;

[0055] Figure 11 This is a schematic diagram of another installation method of the point anchoring connector of the present invention;

[0056] Figure 12 This is a schematic diagram of the overall structure of Embodiment 4 of the present invention;

[0057] Figure 13 This is an exploded view of Embodiment 4 of the present invention;

[0058] Figure 14 This is a schematic diagram of the point anchoring connection in Embodiment 4 of the present invention.

[0059] Explanation of the labels in the diagram:

[0060] 10. Main shielding layer; 11. Main corrugated plate; 12. First corrugation; 13. Second corrugation;

[0061] 20. Main insulation layer; 21. Main insulation box; 22. First fixed anchor bar; 23. First sliding anchor bar; 24. Third fixed anchor bar; 25. Upper plywood; 251. Fixed anchor groove; 252. Sliding anchor groove; 26. Polyurethane layer; 27. Lower plywood; 28. Expansion joint; 29. ​​First unit;

[0062] 30. Secondary shielding layer; 31. Secondary corrugated plate; 32. Third corrugation; 321. Protrusion; 322. Recess; 323. Connecting part; 33. Fourth corrugation;

[0063] 40. Secondary insulation layer; 41. Secondary insulation box; 42. Second fixed anchor bar; 43. Second anchor bar; 43a. Second sliding anchor bar; 44. Fourth fixed anchor bar; 45. Receiving hole; 46. First receiving groove; 47. Void; 48. Second unit;

[0064] 50. Point anchor connector; 51. Lower connecting plate; 52. Stud; 53. Upper pressure plate; 54. Nut; 55. Recess;

[0065] D1, first wave spacing; D2, second wave spacing;

[0066] W1, first width; L1, first length; W2, second width; L2, second length; W3, third width; L3, third length; W4, fourth width; L4, fourth length. Detailed Implementation

[0067] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0068] In the description of this invention, "first wave spacing" refers to the standard spacing between two adjacent peaks of the first (or second) wave on the main corrugated plate; "second wave spacing" refers to the standard spacing between two adjacent peaks of the third (or fourth) wave on the secondary corrugated plate; "fixed anchor strip" refers to an anchor strip that provides rigid fixed constraint to the corrugated plate; "sliding anchor strip" refers to an anchor strip that allows the corrugated plate to slide relative to each other in a specific direction; and "point anchoring connector" refers to a connector that vertically presses and fixes the secondary corrugated plate to the main insulation box at a specific point.

[0069] The membrane enclosure system of the present invention comprises, from the inside out: a main shielding layer 10 formed by splicing together a plurality of main corrugated plates 11, a main insulation layer 20 formed by splicing together a plurality of main insulation boxes 21, a secondary shielding layer 30 formed by splicing together a plurality of secondary corrugated plates 31, and a secondary insulation layer 40 formed by splicing together a plurality of secondary insulation boxes 41.

[0070] Example 1

[0071] Reference Figure 1 and Figure 2 The diagram shown is a schematic representation of the overall structure of a first embodiment of a membrane-type enclosure system according to the present invention.

[0072] Reference Figure 3 As shown, in this embodiment, the main corrugated plate 11 is provided with a first corrugation 12 and a second corrugation 13 that are perpendicular to each other, both of which have a first corrugation pitch D1. The first width W1 and the first length L1 of the main corrugated plate 11 are both integer multiples of the first corrugation pitch D1. In this embodiment, the main corrugated plate 11 is set as a square plate, for example, the first width W1 is set as 3 times the first corrugation pitch D1, and the first length L1 is set as 2 times the first width W1. In other embodiments of the present invention, the main corrugated plate 11 can also be set as other sizes, such as a square with the first length L1 and the first width W1 being equal. Of course, the first width W1 and the first length L1 can also be other multiples of the first corrugation pitch D1, and processing errors are allowed.

[0073] Reference Figure 4As shown, to ensure that the positions of the main insulation box 21 and the secondary insulation box 41 always correspond, the second width W2 and the second length L2 of the main insulation box 21 are integer multiples of the common multiple of the first wave pitch D1 and the second wave pitch D2. In this embodiment, the common multiple of the first wave pitch D1 and the second wave pitch D2 is 3 times the first wave pitch D1 and 2 times the second wave pitch D2. Therefore, the main insulation box 21 is set as a square with the second width W2 and the second length L2 both being 3 times the first wave pitch D1. Of course, in other embodiments of the present invention, the second width W2 can also be other multiples of the first wave pitch D1, and the second length L2 can be different from the second width W2. In this embodiment, since the main shielding layer 10 and the main insulation layer 20 are close to the liquid cargo, their thermal deformation is relatively large. To avoid the rigid constraint of the main corrugated plate 11 causing large corrugation deformation between the two main insulation boxes 21 during low-temperature shrinkage, while the corrugation deformation at other locations is small, thus preventing fatigue damage, a first fixed anchoring strip 22 corresponding to the apex of the main corrugated plate 11 and a first sliding anchoring strip 23 corresponding to the side of the main corrugated plate 11 are provided on the main insulation layer 20. Furthermore, the first fixed anchoring strip 22 is cross-shaped and located at the center of the square main insulation box 21 to fix the apex corners of the four main corrugated plates 11. Along the extension direction of the cross of the first fixed anchor strip 22, a first sliding anchor strip 23 is provided between the two first fixed anchor strips 22, so that the first fixed anchor strip 22 and the first sliding anchor strip 23 form the shape of the main corrugated plate 11, realizing the circumferential connection of the main corrugated plate 11. Specifically, the main corrugated plate 11 is spot welded to the first fixed anchor strip 22 and the first sliding anchor strip 23 respectively. In this embodiment, since the length of the main corrugated plate 11 is greater than its width, fixing only the four corners of the main corrugated plate 11 may still cause the corrugations in the middle of the long side to stretch more than those in other positions. To achieve uniform corrugation stretching, the main insulation layer 20 provides a third fixing anchor 24 at a position on the long side of the main corrugated plate 11 corresponding to an integer multiple of the second width W2. This ensures that the third fixing anchor 24 is located at the center of the main insulation box 21 and provides additional constraint in the long side direction of the main corrugated plate 11, preventing excessive buckling of the corrugations in the central area of ​​the large-area main corrugated plate 11. The third fixing anchor 24 is in the shape of a straight line. In this embodiment, since the main insulation box 21 is square, a first fixing anchor 22 is provided at the center of one main insulation box 21, and a third fixing anchor 24 is provided at the center of another main insulation box 21 located adjacent to it along the length of the main corrugated plate 11. After the six main insulation boxes 21 are spliced ​​together, the first fixed anchor strip 22, the first sliding anchor strip 23 and the third fixed anchor strip 24 form the shape of the main corrugated plate 11, realizing the circumferential connection of the main corrugated plate 11.

[0074] Reference Figure 5As shown, the secondary corrugated plate 31 is provided with mutually perpendicular third corrugations 32 and fourth corrugations 33. A second corrugation spacing D2 exists between the third corrugations 32 and between the fourth corrugations 33. Since a main insulation layer 20 exists between the secondary corrugated plate 31 and the liquid cargo for cold insulation, the expansion and contraction of the secondary corrugated plate 31 is less than that of the main corrugated plate 11. Therefore, the second corrugation spacing D2 is greater than or equal to the first corrugation spacing D1. In this embodiment, the second corrugation spacing D2 is set to be greater than the first corrugation spacing D1, and the third width W3 and third length L3 of the secondary corrugated plate 31 are both integer multiples of the second corrugation spacing D2. Specifically, the third width W3 is set to be twice the second corrugation spacing D2, and the third length L3 is set to be twice the third width W3. Of course, in other embodiments of the present invention, the third width W3 and the third length L3 can be other integer multiples of the second corrugation spacing D2, and the third length L3 can also be equal to the third width W3.

[0075] Reference Figure 6As shown, to ensure that the position of the main insulation box 21 always corresponds to the position of the secondary insulation box 41, the fourth width W4 and the fourth length L4 of the secondary insulation box 41 are also set to integer multiples of the common multiple of the first wave pitch D1 and the second wave pitch D2. In this embodiment, the secondary insulation box 41 is set as a square with both the fourth width W4 and the fourth length L4 being twice the second wave pitch D2. Of course, in other embodiments of the present invention, the fourth width W4 can also be other multiples of the second wave pitch D2, and the fourth length L4 can be different from the fourth width W4. A second fixed anchoring strip 42 corresponding to the apex of the secondary corrugated plate 31 and a second anchoring strip 43 corresponding to the side of the secondary corrugated plate 31 are provided on the secondary insulation layer 40. The secondary corrugated plate 31 is spot-welded to the second fixed anchoring strip 42 and the second anchoring strip 43 respectively. The second anchoring strip 43 can be the second fixed anchoring strip 42, thereby rigidly fixing all four sides of the secondary corrugated plate 31. However, as a preferred embodiment, the second anchoring strip 43 is set as a second sliding anchoring strip 43a. Although the secondary shielding layer 30 and the secondary insulation layer 40 are insulated from the liquid cargo by the primary insulation layer 20, the secondary shielding layer 30 and the secondary insulation layer 40 are still subject to thermal deformation. Furthermore, when the ship is sailing at sea, it is impacted by waves, and the force of the wave impact varies across different parts of the containment system. Rigid constraints can still lead to uneven deformation of the corrugated plates. In this embodiment, the secondary insulation box 41 is square, so the second fixing anchor bar 42 is set in a cross shape at the center of the secondary insulation box 41 to fix the top corners of the four secondary corrugated plates 31. Along the extension direction of the second fixing anchor bar 42, a second sliding anchor bar 43a is provided between two second fixing anchor bars 42. Further, since the length of the secondary corrugated plate 31 is greater than its width, the secondary insulation layer 40 is set at a position on the long side of the secondary corrugated plate 31 corresponding to an integer multiple of the third width W3, and the fourth fixing anchor bar 44 is in a straight line. In this embodiment, the third length L3 is twice the third width W3. Only the fourth fixing anchor 44 needs to be placed at the center of the long side. Since the fourth length L4 is the same as the third width W3, the fourth fixing anchor 44 is located at the center of another secondary insulation box 41. After the six secondary insulation boxes 41 are spliced ​​together, the second fixing anchor 42, the second sliding anchor 43a, and the fourth fixing anchor 44 form the shape of the secondary corrugated plate 31, achieving circumferential connection of the secondary corrugated plate 31.

[0076] The secondary insulation box 41 is also equipped with point anchoring connectors 50 that provide vertical interlayer connection between the secondary corrugated plate 31 and the main insulation box 21. The apex of the main insulation box 21 is installed on the inner side of the secondary corrugated plate 31 via the point anchoring connectors 50, that is, the inner side of the enclosure system corresponding to the liquid cargo. To avoid stress concentration, the apex of the main insulation box 21 is offset from the apex of the secondary insulation box 41. In this embodiment, since the secondary insulation box 41 has a square structure, the center of the second fixing anchor strip 42 is located at the center of the secondary insulation box 41, and the position of the point anchoring connector 50 coincides with the position of the second fixing anchor strip 42. The point anchoring connector 50 corresponds to the apex of the secondary corrugated plate 31 and the main insulation box 21. In this way, the fixing point of the enclosure system is located at the center of the square, and the deformation state of each secondary insulation box 41 is approximately the same, thereby making the deformation of the secondary corrugated plate 31 uniform. Furthermore, the second length L2 of the main insulation box 21 is less than the third length L3. To ensure that the apex corner of each main insulation box 21 is fixed, a point anchoring connector 50 is also provided at the center of the fourth fixing anchoring strip 44. In other embodiments of the present invention, if the length and width of the main insulation box 21 are not the same, the point anchoring connector 50 at the center of the fourth fixing anchoring strip 44 can also form a square fixing point, ensuring a stable connection while improving the uniformity of the overall expansion and contraction of the enclosure system.

[0077] Reference Figure 7 As shown, in this embodiment, the point anchoring connector 50 includes, from bottom to top, a lower connecting plate 51, a stud 52, an upper pressure plate 53, and a nut 54. The lower connecting plate 51 has a recess 55 at its center, facing the secondary insulation box 41. The recess 55 is circumferentially threaded, and the stud 52 is screwed onto the lower connecting plate 51 through this thread. The stud 52 passes through the secondary corrugated plate 31, which is continuously welded to the lower connecting plate 51. To avoid the position of the stud 52, a corresponding clearance opening is provided on the secondary corrugated plate 31. In this embodiment, the clearance opening is located at the side length of the secondary corrugated plate 31. The upper pressure plate 53 is sleeved on the stud 52, and the lower connecting plate 51 and the upper pressure plate 53 press the secondary corrugated plate 31 and the lower plywood 27 of the main insulation box 21 together. The nut 54 is threaded onto the top of the stud 52, and the nut 54 locks the upper pressure plate 53.

[0078] Reference Figure 8As shown, to achieve co-positioning of the point anchor connector 50 and the second fixed anchor strip 42, a receiving hole 45 is provided on the second fixed anchor strip 42 for embedding the lower connecting plate 51 of the point anchor connector 50, so that the lower connecting plate 51 can be close to the lower surface of the secondary corrugated plate 31. The secondary corrugated plate 31 and the lower connecting plate 51 are continuously welded and sealed to achieve complete sealing of the secondary shielding layer 30. In this embodiment, the stud 52 is welded and fixed to the center of the lower connecting plate 51. After the main insulation box 21 is installed, the upper pressure plate 53 is fitted on it, and finally the secondary corrugated plate 31 and the main insulation box 21 are locked between the lower connecting plate 51 and the upper pressure plate 53 by the nut 54.

[0079] Reference Figure 2 As shown, both the main insulation box 21 and the secondary insulation box 41 are composed of three layers: a lower plywood 27, a polyurethane layer 26, and an upper plywood 25. In this embodiment, a fixed anchoring groove 251 and a sliding anchoring groove 252 are respectively provided on the upper plywood 25. The first fixed anchoring strip 22 and the second fixed anchoring strip 42 are respectively disposed in their respective fixed anchoring grooves 251; the first sliding anchoring strip 23 and the second sliding anchoring strip 43a are installed in their respective sliding anchoring grooves 252 through a sliding structure. The sliding structure can be a relative motion structure commonly used in the prior art, such as a T-shaped or dovetail-shaped sliding guide rail. Further, referring to... Figure 9 As shown, the fixed anchoring groove 251 and the sliding anchoring groove 252 are connected through the plywood 25 on the main insulation box 21 for easy processing. (Refer to...) Figure 8 As shown, in other embodiments of the present invention, the fixed anchoring groove 251 and the sliding anchoring groove 252 may also be provided separately and are not connected to each other.

[0080] Reference Figure 2 As shown, in this embodiment, to ensure the integrity of the main insulation box 21, both the first corrugation 12 and the second corrugation 13 protrude in a direction away from the main insulation layer 20, i.e., towards the interior of the enclosure system. This eliminates the need for receiving grooves on the main insulation box 21 to accommodate the first corrugation 12 and the second corrugation 13, thus improving the strength of the main insulation box 21. However, to ensure the uniformity of the expansion and contraction of the main insulation box 21, expansion joints 28 are provided on the main insulation box 21 at positions corresponding to the first corrugation 12 and the second corrugation 13 to accommodate the relative thermal deformation between the main corrugated plate 11 and the main insulation box 21. The expansion joint 28 extends in the depth direction to the middle of the polyurethane layer 26 of the main insulation box 21 and is continuous in the horizontal direction. (Refer to...) Figure 5As shown, in this embodiment, the third corrugation 32 and the fourth corrugation 33 are both provided with protrusions 321, recesses 322, and connecting portions 323 in the extending direction. The connecting portion 323 connects the protrusions 321 and the recesses 322 together. The protrusions 321 protrude towards the main insulation layer 20, and the recesses 322 protrude towards the secondary insulation layer 40. By providing a convex-concave mating structure in the extending direction of the corrugations, the convection of gas within the corrugated plate can be effectively blocked, thereby effectively reducing the evaporation of liquid cargo in the storage tank and thus reducing cargo loss. At the same time, a first receiving groove 46 for accommodating the recesses 322 is provided on the secondary insulation layer 40, and a second receiving groove for accommodating the protrusions 321 is provided on the main insulation layer 20. The presence of the first receiving groove 46 on the secondary insulation layer 40 not only achieves precise fitting of the corrugations, but also has a similar function to the expansion joint 28, making the secondary insulation box 41 shrink and expand evenly. Furthermore, the height of the first corrugation 12 is greater than the height of the second corrugation 13, and the height of the third corrugation 32 is greater than the height of the fourth corrugation 33. The first corrugation 12 and the third corrugation 32 have better stretchability. Therefore, when the containment system is applied to a transport ship, the adjacent first corrugation 12 and the third corrugation 32 are arranged in a direction perpendicular to the length of the ship, that is, the first corrugation 12 and the third corrugation 32 are arranged in a direction perpendicular to the length of the containment system.

[0081] During installation, the secondary insulation box 41 is assembled, and the secondary corrugated plate 31 is spot-welded to the second fixed anchor strip 42, the second sliding anchor strip 43a, and the fourth fixed anchor strip 44. Adjacent secondary corrugated plates 31 are continuously welded and sealed, and simultaneously, the secondary corrugated plates 31 are continuously welded and sealed to the lower connecting plate 51 of the spot anchor connector 50, making the spot anchor connector 50 an integral part of the secondary shielding layer 30 sealing system, preventing liquid leakage from the connection. The main insulation box 21 is assembled and laid on the secondary corrugated plate 31, and the upper pressure plate 53 is used to press down the lower plywood 27 at the top corner of the main insulation box 21 and lock it with nuts 54. Finally, the main corrugated plate 11 is spot-welded to the first fixed anchor strip 22, the first sliding anchor strip 23, and the third fixed anchor strip 24, and adjacent main corrugated plates 11 are continuously welded and sealed, completing the installation of the enclosure system. When the enclosure system carries liquid cargo, both the corrugated plate and the insulation box shrink, and there is a difference in shrinkage between the two. However, in this embodiment, the secondary insulation box 41 and the main insulation box 21 are set as square. The fixing points of the four corners of the main insulation box 21 coincide with the fixing points of the secondary corrugated plate 31 and are set at the square center of the secondary insulation box 41. The fixing point of the main corrugated plate 11 is set at the center of the main insulation box 21. The deformation area involved by each fixing point is approximately equal. At the same time, there is an expansion joint 28 on the main insulation box 21. The expansion joint 28 is not only set to correspond with the first corrugation 12 and the second corrugation 13, but also extends to the middle of the polyurethane layer 26 in the depth direction and is continuous in the horizontal direction. That is, the expansion joint 28 in the same straight direction is continuously set. On the one hand, the expansion and contraction of the main insulation box 21 corresponds to the expansion and contraction of the main corrugated plate 11, so that the entire corrugation of the first corrugation 12 and the second corrugation 13 expands and contracts synchronously, avoiding the uneven expansion and contraction of the main insulation box 21 affecting the expansion and contraction of the main corrugated plate 11. On the other hand, the expansion and contraction differences at various locations are divided into small areas and can be released from each fixed point to the surrounding areas, avoiding the accumulation of deformation. In this embodiment, with the fixed anchor strip set at the center of the insulation box, the point anchor connectors overlapping with the fixed anchor strips and correspondingly connecting the four corners of the main insulation box, and the expansion joints corresponding to the corrugations of the main corrugated plate, the uniformity of the stress on the insulation box and the uniformity of the deformation of the corrugated plate are significantly improved under the superposition of multiple conditions.

[0082] Example 2

[0083] In this embodiment, the second wave pitch D2 is equal to the first wave pitch D1. The first width W1 of the main corrugated plate 11 is 3 times the first wave pitch D1, and the first length L1 is 2 times the first width W1; the second width W2 and the second length L2 of the main insulation box 21 are both 3 times the first wave pitch D1; the third width W3 of the secondary corrugated plate 31 is 3 times the second wave pitch D2, and the third length L3 is 2 times the third width W3; the fourth width W4 and the fourth length L4 of the secondary insulation box 41 are both 3 times the second wave pitch D2.

[0084] In this embodiment, the first fixing anchor strip 22 and the second fixing anchor strip 42 are located at the midpoints of the main insulation box 21 and the secondary insulation box 41, respectively, and the position of the point anchor connector 50 coincides with the center position of the second fixing anchor strip 42. Since the lengths of the main corrugated plate 11 and the secondary corrugated plate 31 are twice the lengths of the main insulation box 21 and the secondary insulation box 41, two main insulation boxes 21 are grouped together, and two secondary insulation boxes 41 are grouped together. A cross-shaped fixing anchor strip corresponding to the apex corner of the main corrugated plate 11 or the secondary corrugated plate 31 is provided at the center of one main insulation box 21 or the secondary insulation box 41, and a third fixing anchor strip 24 or a fourth fixing anchor strip 44 corresponding to the side length of the main corrugated plate 11 or the secondary corrugated plate 31 is provided at the center of the other main insulation box 21 or the secondary insulation box 41. (Refer to...) Figure 9 As shown, in this embodiment, the first fixing anchor strip 22 and the second fixing anchor strip 42 are formed by splicing four short anchor strips to form a cross-shaped fixing anchor strip, and the third fixing anchor strip 24 and the fourth fixing anchor strip 44 are formed by splicing two short anchor strips to form a straight fixing anchor strip. The center gap 47 of the cross-shaped and straight fixing anchor strips is where the point anchor connector 50 is located. In this embodiment, the second wave spacing D2 of the secondary corrugated plate 31 is reduced compared to Embodiment 1, further improving the expansion and contraction capacity of the secondary corrugated plate 31.

[0085] Example 3

[0086] Reference Figure 10 The diagram shown is a schematic representation of a third embodiment of a membrane-type enclosure system according to the present invention.

[0087] In this embodiment, the second wave spacing D2 is greater than the first wave spacing D1. The common multiple of the first wave spacing D1 and the second wave spacing D2 is 3 times the first wave spacing D1 and 2 times the second wave spacing D2. Specifically, the first width W1 of the main corrugated plate 11 is 3 times the first wave spacing D1, and the first length L1 is 2 times the first width W1; the second width W2 and the second length L2 of the main insulation box 21 are both 3 times the first wave spacing D1; the third width W3 of the secondary corrugated plate 31 is 2 times the second wave spacing D2, and the third length L3 is 2 times the third width W3; the fourth width W4 of the secondary insulation box 41 is 2 times the second wave spacing D2, and the fourth length L4 is 2 times the fourth width W4.

[0088] In this embodiment, the first fixing anchor strip 22 is located at the center of the square of the main insulation box 21 with a side length of the second width W2. Since the main insulation box 21 itself is square, the first fixing anchor strip 22 is located at the center of the main insulation box 21. Since the secondary insulation box 41 has different lengths and widths, in order to make the secondary insulation box 41 and the secondary corrugated plate 31 deform as uniformly as possible around the fixing point, the second fixing anchor strip 42 is located at the end of the secondary insulation box 41, specifically at the center of the square with a side length of the fourth width W4, and the center of the point anchoring connector 50 coincides with the center of the second fixing anchor strip 42. Setting the constraint position as far towards the center as possible has two advantages: firstly, the position of the first fixing anchor strip 22 serves as a fixing point, and the closer the distance between each edge and this point, the more uniform the shrinkage deformation towards this point; secondly, the fixing anchor constraint point and the interlayer point anchoring connection position are combined into one, which simplifies the number of openings and components on the secondary insulation box 41, while ensuring that the apex of the secondary corrugated plate 31 is both subject to rigid in-plane fixing constraint and achieves reliable vertical pressing and fixing with the main insulation box 21. Since the length of the secondary corrugated plate 31 and the main corrugated plate 11 is longer than their width, uneven deformation may still occur if only the four corners are fixed. Therefore, the main insulation layer 20 and the secondary insulation layer 40 are respectively provided with a straight third fixing anchor strip 24 and a fourth fixing anchor strip 44 at positions on the main corrugated plate 11 and the secondary corrugated plate 31 corresponding to integer multiples of the first width W1 or the third width W3. In this embodiment, the third length L3 of the secondary corrugated plate 31 is twice the third width W3, and the fourth length L4 of the secondary insulation box 41 is twice the fourth width W4 to ensure uniform deformation of the secondary corrugated plate 31. Therefore, a second fixing anchor strip 42 and a fourth fixing anchor strip 44 are provided on the secondary insulation box 41. The fourth length L4 is also twice the second length L2 and the second width W2. In order to fix the top corner of the main insulation box 21, a point anchor connector 50 is also provided at the center of the fourth fixing anchor strip 44. In this embodiment, the secondary insulation box 41 is larger in size, which reduces the number of steps required to lay the secondary insulation layer 40.

[0089] Reference Figure 11As shown, furthermore, to prevent uneven surfaces from causing the top corners of multiple main insulation boxes 21 to be at different heights during the laying of the main insulation layer 20, thus preventing a single upper pressure plate 53 from completely compacting all the upper main insulation blocks, in this embodiment, multiple studs 52 are provided on the lower connecting plate 51, the specific number corresponding to the number of main insulation boxes 21 to be connected. Taking four studs 52 on the lower connecting plate 51 as an example, the four studs 52 can be screwed onto the lower connecting plate 51 or welded onto the lower connecting plate 51. The main insulation box 21 has a slot to expose the lower plywood 27. To avoid interference between the studs 52 and the lower plywood 27, holes can be made in the lower plywood 27, and the studs 52 pass through the holes in the lower plywood 27. Multiple upper pressure plates 53 are respectively fitted onto the studs 52, and each nut 54 locks the lower pressure plate. Alternatively, the top corners of the lower plywood 27 can be cut off so that the studs 52 can be positioned close to each lower plywood 27, and then the upper pressure plates 53 can be fitted on and the nuts 54 tightened. Each top corner of the main insulation box 21 corresponds to a set of studs 52-upper pressure plates 53-nuts 54, which are tightened independently to avoid uneven clamping force.

[0090] Example 4

[0091] Reference Figure 12 The diagram shown is a schematic diagram of the overall structure of a fourth embodiment of a membrane-type enclosure system of the present invention.

[0092] Reference Figure 13 The diagram shown is an exploded view of this embodiment. The main corrugated plate 11 has mutually perpendicular first corrugations 12 and second corrugations 13, both having a first corrugation spacing D1. The first width W1 and first length L1 of the main corrugated plate 11 are both integer multiples of the first corrugation spacing D1. In this embodiment, the main corrugated plate 11 is set as a rectangular plate, for example, the first width W1 is set to 3 times the first corrugation spacing D1, and the first length L1 is set to twice the first width W1. In other embodiments of the present invention, the main corrugated plate 11 can also be set to other dimensions, such as a square with the first length L1 and the first width W1 equal. Of course, the first width W1 and the first length L1 can also be other multiples of the first corrugation spacing D1.

[0093] Because the main shielding layer 10 and the main insulation layer 20 are close to the liquid cargo, their thermal deformation is relatively large. To avoid the rigid constraint of the main corrugated plate 11 causing large corrugation deformation between the two main insulation boxes 21 during low-temperature shrinkage, while the corrugation deformation at other locations is small, thus leading to fatigue damage, in this embodiment, a first fixed anchoring strip 22 and a first sliding anchoring strip 23 are provided on the main insulation box 21. The main insulation box 21 is divided into multiple first units 29, with the side length of the first unit 29 being the first corrugation pitch D1. Based on the size of the main corrugated plate 11, the first fixed anchoring strips 22 are arranged corresponding to the center of one or more of the first units 29 to provide rigid fixed constraints at the vertices of the main corrugated plate 11, preventing overall displacement of the main corrugated plate 11. The first fixed anchoring strips 22 are cross-shaped to fix the vertices of the four main corrugated plates 11. Along the extension direction of the first fixed anchoring strips 22, a first sliding anchoring strip 23 is provided between two first fixed anchoring strips 22. Thus, the first fixed anchor strip 22 and the first sliding anchor strip 23 form the shape of the main corrugated plate 11, achieving circumferential connection of the main corrugated plate 11. Since only the apex of the main corrugated plate 11 is fixed, and the first fixed anchor strip 22 is located at the center of the first unit 29, that is, the first unit 29 is a certain distance from the edge of the main insulation box 21, the main insulation box 21 contracts towards the position of the first fixed anchor strip 22 in various directions, causing the main corrugated plate 11 to extend. Due to the presence of the first sliding anchor strip 23, the main corrugated plate 11 can slide appropriately in the length and width directions. The extension caused by the main insulation box 21 will not accumulate in the length and width directions of the corrugated plate, but can be released in all directions, thereby reducing the thermal stress concentration of the main corrugated plate 11 and enabling the main corrugated plate 11 to extend evenly.

[0094] The secondary corrugated plate 31 is provided with mutually perpendicular third corrugations 32 and fourth corrugations 33. The third corrugations 32 and fourth corrugations 33 have a second corrugation spacing D2. Since there is a main insulation layer 20 between the secondary corrugated plate 31 and the liquid cargo for cold insulation, the expansion and contraction of the secondary corrugated plate 31 is less than that of the main corrugated plate 11. Therefore, the second corrugation spacing D2 is greater than or equal to the first corrugation spacing D1. In this embodiment, the second corrugation spacing D2 is set to be greater than the first corrugation spacing D1, and the third width W3 and the third length L3 of the secondary corrugated plate 31 are both integer multiples of the second corrugation spacing D2. Specifically, the third width W3 is set to be twice the second corrugation spacing D2, and the third length L3 is set to be twice the third width W3. Of course, in other embodiments of the present invention, the third width W3 and the third length L3 can be other integer multiples of the second corrugation spacing D2, and the third length L3 can also be equal to the third width W3.

[0095] Reference Figure 14As shown, a second fixed anchoring strip 42 and a second anchoring strip 43 are provided on the secondary insulation box 41. Specifically, the second anchoring strip 43 is set as a second sliding anchoring strip 43a. In this embodiment, the secondary insulation box 41 is divided into multiple second units 48, and the side length of the second unit 48 is the second wave pitch D2. According to the size of the secondary corrugated plate 31, the second fixed anchoring strip 42 is arranged corresponding to the center of one or more of the second units 48 to provide rigid fixed constraints at the vertices of the secondary corrugated plate 31 and prevent the secondary corrugated plate 31 from undergoing overall displacement. At this time, the second fixed anchoring strip 42 is set in a cross shape to fix the vertices of the four secondary corrugated plates 31. Along the extension direction of the second fixed anchoring strip 42, a second anchoring strip 43 is provided between two second fixed anchoring strips 42. In this embodiment, it is a second sliding anchoring strip 43a, which realizes the circumferential connection of the secondary corrugated plate 31.

[0096] To ensure that the apex of the main insulation box 21 always corresponds to the position of the secondary insulation box 41, the second width W2 and second length L2 of the main insulation box 21, and the fourth width W4 and fourth length L4 of the secondary insulation box 41 are integer multiples of the common multiples of the first wave pitch D1 and the second wave pitch D2. For example, 3 times the first wave pitch D1 is equal to 2 times the second wave pitch D2. In this embodiment, the main insulation box 21 is set as a square, and the second width W2 and second length L2 are both 3 times the first wave pitch D1. Of course, the second width W2 and second length L2 can also be set as other multiples of the first wave pitch D1. The secondary insulation box 41 is set as a rectangle, the fourth width W4 is 2 times the second wave pitch D2, and the fourth length L4 is 4 times the second wave pitch D2. Similarly, the fourth width W4 and fourth length L4 can also be set as other multiples of the second wave pitch D2.

[0097] The secondary insulation box 41 is also provided with a point anchoring connector 50 connecting the secondary corrugated plate 31 and the main insulation box 21. In this embodiment, since the center position of the second fixed anchoring strip 42 is not at the center of the square with the fourth width W4 as the side length of the secondary insulation box 41, the position of the point anchoring connector 50 does not coincide with the center position of the second fixed anchoring strip 42, that is, the centers of the point anchoring strip and the second fixed anchoring strip 42 are eccentrically set. Specifically, the point anchoring connector 50 is set at the center of the other second unit 48, and corresponds to the center position of the square formed by the third corrugation 32 and the fourth corrugation 33 on the secondary corrugated plate 31, that is, it is located at the center of the square formed by two adjacent third corrugations 32 and two adjacent fourth corrugations 33. The point anchoring connector 50 provides the interlayer vertical connection between the secondary corrugated plate 31 and the main insulation box 21 at the center of the square. To simplify the processing, in this embodiment, refer to Figure 14 As shown, the stud 52 of the point anchor connector 50 is fixed to the lower connecting plate 51 by welding.

[0098] Reference Figure 13As shown, each secondary insulation box 41 is divided into two columns and four rows, totaling eight second units 48. The second fixed anchoring strip 42 is located at the center of the second unit 48 in the third row of the first column. Along the extension direction of the second fixed anchoring strip 42, second sliding anchoring strips 43a are respectively provided on the second units 48 in the first row, the second row, the fourth row of the first column, and the third row of the second column. The point anchoring connector 50 is located at the center of the second unit 48 in the second row and the fourth row of the second column. At this time, when the four secondary insulation boxes 41 are spliced ​​together, the quadrilateral formed by the four second fixed anchoring strips 42 and the eight second sliding anchoring strips 43a corresponds exactly to the four sides of the secondary corrugated plate 31. The point anchoring connector 50 corresponds to the center of the square formed by the third corrugation 32 and the fourth corrugation 33 on the secondary corrugated plate 31. In this embodiment, because the point anchor connector 50 and the second fixed anchor strip 42 are eccentrically positioned, the positions of the point anchor connector 50 and the second fixed anchor strip 42 respectively restrict the secondary corrugated plate 31. Therefore, even if the length of the secondary corrugated plate 31 is long, there is no need to set additional fixed anchor strips in the length direction of the secondary corrugated plate 31. The deformation can be divided and digested within each corrugated grid, reducing the stress concentration of the secondary corrugated plate 31 and ensuring the uniformity of the corrugated plate deformation. The apex of the main insulation box 21 is positioned corresponding to the point anchor connector 50, which fixes the secondary corrugated plate 31 and the main insulation box 21. Each main insulation box 21 is divided into three columns and three rows, totaling nine first units 29. Since the length of the main corrugated plate 11 is twice that of the main insulation box 21, two main insulation boxes 21 form a group. The first main insulation box 21 corresponds to the apex of the main corrugated plate 11, and the second main insulation box 21 only corresponds to the side of the main corrugated plate 11. Therefore, the second fixed anchor strip 42 is located at the center of the first unit 29 of the first column and the first row. Along the extension direction of the first fixed anchor strip 22, the second sliding anchor strip 43a is respectively provided on the first column and the second row, the first column and the third row, the second column and the first row and the third row of the main insulation box 21, as well as the first column and the first, second and third rows of the second main insulation box 21. At this time, when the six main insulation boxes 21 are spliced ​​together, the quadrilateral formed by the four second fixed anchor strips 42 and the 14 second sliding anchor strips 43a corresponds exactly to the four sides of the main corrugated plate 11.

[0099] In this embodiment, the second fixed anchor is offset from the center of the secondary insulation box 41. When the secondary insulation box 41 expands and contracts towards the fixed point, the expansion and contraction are uneven, which can easily lead to uneven expansion and contraction of the secondary corrugated plate 31. Therefore, a point anchor connector 50 is set at another position as another fixed point for the expansion and contraction of the secondary corrugated plate 31. Under the mutual restraint of multiple fixed points, the uniform expansion and contraction of the secondary corrugated plate 31 is achieved. An expansion joint 28 is set on the main insulation box 21 corresponding to the corrugated position, which reduces the superposition of expansion and contraction deformation of the insulation box as a whole in a certain direction and improves the uniformity of expansion and contraction of the main corrugated plate 11. Although the point anchor connector 50 is eccentrically set with the second fixed anchor strip 42, both the second fixed anchor strip 42 and the point anchor connector 50 are located at the center of the grid, and the fixed position is a certain distance from the edge of the secondary insulation box 41, thus ensuring the stability of the connection position.

[0100] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A membrane-type enclosure system, characterized in that, From the inside out, the following are included: The main shielding layer is formed by splicing together several main corrugated plates. The main corrugated plates are provided with first corrugations and second corrugations that are perpendicular to each other. There is a first wave spacing between the first corrugations and the second corrugations. The first width and the first length of the main corrugated plates are both integer multiples of the first wave spacing. The main insulation layer is provided with a first fixed anchoring strip corresponding to the apex of the main corrugated plate and a first sliding anchoring strip corresponding to the side of the main corrugated plate. The main insulation layer is formed by splicing together several main insulation boxes. The first fixed anchoring strip and the first sliding anchoring strip are set at corresponding positions of the main insulation boxes. The outer periphery of the main corrugated plate is fixedly connected to the main insulation box through the first fixed anchoring strip and the first sliding anchoring strip. The secondary shielding layer is formed by splicing together several secondary corrugated plates. The secondary corrugated plates are provided with mutually perpendicular third and fourth corrugations. There is a second wave spacing between the third and fourth corrugations. The second wave spacing is greater than or equal to the first wave spacing. The third width and third length of the secondary corrugated plates are integer multiples of the second wave spacing. The secondary insulation layer is provided with a second fixing anchor strip corresponding to the apex of the secondary corrugated plate and a second anchor strip corresponding to the side of the secondary corrugated plate. The secondary insulation layer is formed by splicing together several secondary insulation boxes. The second fixing anchor strip and the second anchor strip are provided at corresponding positions of the secondary insulation boxes. The outer periphery of the secondary corrugated plate is fixedly connected to the secondary insulation box through the second fixing anchor strip and the second anchor strip. The main insulation layer and the secondary insulation layer are provided with a third fixed anchor strip and a fourth fixed anchor strip at positions corresponding to integer multiples of the first width or the third width on the long side of the main corrugated plate and the secondary corrugated plate, respectively. The second width and the second length of the main insulation box and the fourth width and the fourth length of the secondary insulation box are integer multiples of the common multiple of the first wave pitch and the second wave pitch, respectively. The secondary insulation box is provided with a point anchor connector at the center of the second fixed anchor strip or at the center of the square formed by the third and fourth corrugations on the secondary corrugated plate. The main insulation box is installed on the inner side of the secondary corrugated plate through the point anchor connector. The point anchoring connector, from bottom to top, includes: a lower connecting plate, which is embedded in the secondary insulation box; a stud, which is fixedly connected to the lower connecting plate; an upper pressure plate, which is sleeved on the stud; and a nut, which is threaded to the top of the stud. The secondary corrugated plate is continuously welded and sealed to the lower connecting plate. The lower connecting plate and the upper pressure plate press the secondary corrugated plate together with the lower plywood of the main insulation box, and the nut locks the upper pressure plate.

2. The membrane-type enclosure system as described in claim 1, characterized in that, The second width and the second length are equal, and the fourth length is an integer multiple of the fourth width.

3. A membrane-type enclosure system as described in claim 2, characterized in that, The point anchoring connectors are set at the four corners of the main insulation box.

4. A membrane-type enclosure system as described in claim 1, characterized in that, The apex corner of the main insulation box is offset from the apex corner of the secondary insulation box.

5. A membrane-type enclosure system as described in claim 1, characterized in that, The center of the first fixed anchor strip is located at the center of a square with the second width as its side length at the end of the main insulation box, and the center of the second fixed anchor strip is located at the center of a square with the fourth width as its side length on the secondary insulation box, and the center of the point anchor connector coincides with the center of the second fixed anchor strip.

6. A membrane-type enclosure system as described in claim 5, characterized in that, The fourth fixed anchoring strip is also provided with the point anchoring connector at its center.

7. A membrane-type enclosure system as described in claim 5, characterized in that, The second fixed anchoring strip has a receiving hole for accommodating the point anchoring connector.

8. A membrane-type enclosure system as described in claim 5, characterized in that, The point anchoring connector is located at the center of the secondary insulation box, and multiple second fixing anchoring strips extend along the outer side of the point anchoring connector toward the side length of the secondary insulation box.

9. A membrane-type enclosure system as described in claim 1, characterized in that, The main insulation box is divided into multiple first units based on the first wave pitch, and the center of the first fixed anchor bar is set at the center of any first unit. The secondary insulation box is divided into multiple second units based on the second wave pitch, and the center of the second fixed anchor bar is set at the center of any second unit. The point anchor connector is located at the center of other second units and is set at the center of the square formed by the third and fourth waves on the secondary corrugated plate.

10. A membrane-type enclosure system as described in claim 1, characterized in that, The second anchoring strip is a second sliding anchoring strip.

11. A membrane-type enclosure system as described in claim 1, characterized in that, Both the main insulation box and the secondary insulation box include a lower plywood, a polyurethane layer, and an upper plywood. The upper plywood is provided with a fixed anchor groove and a sliding anchor groove. The first fixed anchor strip and the second fixed anchor strip are disposed in the fixed anchor groove, and the first sliding anchor strip is installed in the sliding anchor groove through a sliding structure.

12. A membrane-type enclosure system as described in claim 11, characterized in that, The fixed anchoring groove is connected to the sliding anchoring groove.

13. A membrane-type enclosure system as described in claim 1, characterized in that, The main corrugated plate is spot-welded to the first fixed anchor strip and the first sliding anchor strip, respectively, and the secondary corrugated plate is spot-welded to the second fixed anchor strip and the second anchor strip, respectively.

14. A membrane-type enclosure system as described in claim 1, characterized in that, Expansion joints are provided on the main insulation box at positions corresponding to the first and second corrugations.

15. A membrane-type enclosure system as described in claim 14, characterized in that, The expansion joint extends in the depth direction to the middle of the polyurethane layer of the main insulation box, and the expansion joint extends horizontally.

16. A membrane-type enclosure system as described in claim 1 or 14, characterized in that, The third and fourth corrugations are each provided with a protrusion, a recess, and a connecting portion in the extending direction. The connecting portion connects the protrusion and the recess together. The protrusion protrudes towards the main insulating layer, and the recess protrudes towards the secondary insulating layer. A first receiving groove for accommodating the recess is formed on the secondary insulating layer, and a second receiving groove for accommodating the protrusion is formed on the main insulating layer.

17. A membrane-type enclosure system as described in claim 1, characterized in that, The first and second corrugations protrude in a direction away from the main insulating layer.

18. A membrane-type enclosure system as described in claim 1, characterized in that, The height of the first corrugation is greater than the height of the second corrugation, and the height of the third corrugation is greater than the height of the fourth corrugation. The first corrugation and the third corrugation are arranged along a direction perpendicular to the length of the enclosure system.

19. A membrane-type enclosure system as described in claim 1, characterized in that, The secondary corrugated plate is provided with a clearance opening to avoid the stud.

20. A membrane-type enclosure system as described in claim 1, characterized in that, The lower connecting plate has a recessed pit at its center facing the secondary insulation box, and the recess has threads on its circumference. The stud is screwed onto the lower connecting plate by the threads.

21. A membrane-type enclosure system as described in claim 1, characterized in that, The stud is welded to the lower connecting plate.

22. A membrane-type enclosure system as described in claim 1, characterized in that, One of the studs is located at the center of the lower connecting plate.

23. A membrane-type enclosure system as described in claim 1, characterized in that, The number of studs, upper pressure plates, and nuts corresponds to the number of the main insulation boxes above.

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