Heat insulation system of liquid tank bottom support area and installation method of heat insulation system

Abstract

The invention provides a heat insulation system of a liquid tank bottom support and an installation method of the heat insulation system. The thermal insulation system includes a modular thermal insulation panel, a first baffle, a second baffle, and a third baffle. The modularized heat insulation plate is formed by splicing a plurality of prefabricated heat insulation plates, and a protruding structure is arranged on the first surface laid to the outer surface of the liquid tank. The first baffle is arranged on the second surface close to the reinforcing structure, and a first space is formed by the first baffle, the bottom support area and the modular heat insulation plate; a second space is formed among the second baffle, the first baffle and the bottom support area; a third space is formed among the third baffle, the second baffle, the modular heat insulation plate and the bottom support area; the first space, the second space and the third space are all filled with polyurethane foam. According to the heat insulation system, the modularized prefabricated slabs and the polyurethane foam are combined, so that the sealing performance and the heat insulation capacity of the heat insulation system of the bottom support area with the complex structure are improved; the heat insulation system is high in integration level and can provide a good heat insulation function in a low-temperature environment.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal insulation of liquid cargo tanks of ships, and in particular to a thermal insulation system for a support area at the bottom of a liquid tank and an installation method thereof. Background Art

[0002] In the field of liquefied gas carriers, independent Type B liquid tanks, as core equipment that complies with the IMO IGC Code specifications, need to safely store cryogenic cargoes such as liquefied natural gas (LNG) and liquefied petroleum gas (LPG) under ultra-low temperature conditions. Due to the heat absorption characteristics of vaporization of cryogenic liquids, there is continuous heat conduction between the liquid tank and the external environment. If effective insulation measures are not taken, the cryogenic liquid in the liquid tank will vaporize due to heat, causing the pressure to increase, threatening the safety of ship operation. Therefore, the IMO IGC Code clearly requires the installation of an insulation system for independent liquid tanks. Its core requirements include: the insulation system must limit the heat flow from the external environment to the interior of the liquid tank within the adjustable range of the pressure and temperature control system to avoid the risk of overpressure caused by excessive vaporization of the liquid; the insulation system must also act as a splash barrier to form a continuous leakage channel with the outer surface of the liquid tank to prevent the cryogenic liquid from directly contacting the hull structure and avoid failure of the hull material due to embrittlement at low temperatures.

[0003] For the uniquely structured independent Type B liquid tanks, especially special areas such as the supports at the bottom of the tanks, existing insulation system solutions are difficult to meet design requirements. As a key component that supports the tank and connects to the hull, the insulation design of the independent Type B liquid tank's base supports faces special challenges. Existing insulation system solutions, such as spraying insulation foam layers or directly installing prefabricated insulation panels, cannot fully adapt to the needs of this area due to the special structure and function of the supports at the bottom of the tanks. This results in unsatisfactory insulation effects, making it difficult to effectively prevent heat transfer and potential liquid leakage risks, limiting the overall performance and safety of the tanks. Summary of the Invention

[0004] In view of the defects and shortcomings of the existing technology, the present application provides an insulation system for the bottom support area of ​​a liquid tank and an installation method thereof to solve the problem of unsatisfactory insulation effect of the bottom support area of ​​the liquid tank in the existing technology.

[0005] To achieve the above-mentioned and other related objectives, in a first aspect, the present application provides a thermal insulation system for a bottom support area of ​​a liquid tank, wherein the bottom support area is provided at the bottom of the liquid tank and includes a reinforcement structure provided near the outer surface of the liquid tank, a pressure block facing away from the outer surface of the liquid tank and connected to the reinforcement structure, and a pressure block fence provided around the pressure block near the reinforcement structure. The thermal insulation system includes:

[0006] a modular insulation panel formed by splicing a plurality of prefabricated insulation panels and arranged around the reinforcement structure, the modular insulation panel comprising a first surface and a second surface arranged opposite to each other, the first surface being applied to the outer surface of the liquid tank near the bottom support area and having a protruding structure provided on the first surface, and the second surface being arranged away from the outer surface of the liquid tank;

[0007] a first baffle disposed on the second surface close to the reinforcement structure, wherein a first space is formed between the first baffle, the reinforcement structure, and the modular insulation panel, and the first space is filled with polyurethane foam;

[0008] a second baffle, one end of which is connected to the edge of the first baffle, and the other end of which is connected to the intersection of the pressure block fence and the pressure block, wherein a second space is formed between the first baffle, the second baffle, and the pressure block fence, and the second space is filled with polyurethane foam;

[0009] A third baffle has one end connected to the second surface located outside the second baffle, and the other end connected to the side of the pressure block. A third space is formed between the third baffle, the second baffle, the second surface, and the side of the pressure block, and the third space is filled with polyurethane foam.

[0010] As an embodiment, the third baffle includes a vertical connecting section, an inclined connecting section and a horizontal connecting section connected in sequence, one end of the vertical connecting section is connected to the second surface, and one end of the horizontal connecting section is connected to the side of the pressure block.

[0011] As an embodiment, the first baffle, the second baffle, and the third baffle are all provided with operation holes.

[0012] As an embodiment, the height difference between the connection point between the third baffle and the pressure block and the surface of the pressure block facing away from the reinforcement structure is between 5 mm and 100 mm.

[0013] As an embodiment, the distance from the connection point between the third baffle and the second surface to the connection point between the second baffle and the first baffle is not less than 50 mm.

[0014] As an embodiment, the modular insulation panel includes a plurality of first prefabricated insulation panels, a plurality of second prefabricated insulation panels, and a plurality of third prefabricated insulation panels, wherein the first prefabricated insulation panels and the second prefabricated insulation panels are located at the reinforcement structure, and the third prefabricated insulation panels are filled between the first prefabricated insulation panels and the second prefabricated insulation panels, and the first prefabricated insulation panels, the second prefabricated insulation panels, and the third prefabricated insulation panels are spliced ​​to form a plate shape;

[0015] The first prefabricated insulation board, the second prefabricated insulation board, and the third prefabricated insulation board all include an inner insulation layer, a reinforcement layer, and an outer insulation layer stacked in sequence. The surface of the inner insulation layer close to the liquid tank is the first surface, and the surface of the outer insulation layer away from the reinforcement layer is the second surface.

[0016] As an embodiment, the surface of the inner heat-insulating layer adjacent to the reinforcing layer is larger in area than the surface of the reinforcing layer adjacent to the inner heat-insulating layer; the surface of the reinforcing layer adjacent to the outer heat-insulating layer is consistent with the surface of the outer heat-insulating layer adjacent to the reinforcing layer; the area of ​​the first surface is larger than the area of ​​the second surface; and a step structure is provided on the surface of the outer heat-insulating layer facing away from the reinforcing layer.

[0017] An elastic connecting layer is provided at the gap between adjacent inner insulation layers;

[0018] Prefabricated connecting strips are provided at the gaps between adjacent outer insulation layers.

[0019] As an embodiment, thermal insulation patches are provided on the second surface of the first prefabricated thermal insulation board and the second surface of the second prefabricated thermal insulation board near the edge of the reinforcement structure.

[0020] As an embodiment, a fixing component is provided at the gap between adjacent inner insulation layers and between the inner insulation layer corresponding to the insulation patch and the reinforcement structure, and the elastic connecting layer is provided between the fixing component and the inner insulation layer;

[0021] The fixing assembly includes a fixing piece, a connecting column, a fixing stud, a nut and a washer, wherein the fixing piece is connected to one end of the connecting column through the nut and the washer, the other end of the connecting column is threadedly connected to one end of the fixing stud, and the other end of the fixing stud is connected to the fixing stud positioning portion on the outer surface of the liquid tank;

[0022] The fixing part includes a reinforcing plate, a bending portion, a cavity portion and a connecting portion. The cavity portion is provided with a hollow cavity, and an insulating plug is provided in the cavity; the two bending portions are relatively arranged on both sides of the cavity portion, the reinforcing plate is arranged on the surface of the bending portion away from the cavity portion, and at least one of the bending portions abuts against the surface of the inner insulation layer close to the reinforcing layer; the connecting portion is arranged at the other end of the cavity portion, and the connecting portion is connected to the connecting column.

[0023] As an embodiment, the prefabricated connecting strips include hard connecting strips and elastic connecting strips;

[0024] The hard connecting strips are arranged at the gaps between adjacent outer insulation layers;

[0025] The elastic connecting strips are arranged between the hard connecting strip and the outer heat-insulating layer, between the hard connecting strip and the reinforcing layer, and between the step structures of adjacent outer heat-insulating layers.

[0026] As an embodiment, a protective layer is provided on the second surface of the modular insulation panel and the outer surface of the third baffle.

[0027] In a second aspect, the present application further provides a method for installing an insulation system in a support area at the bottom of a liquid tank, comprising the following steps:

[0028] Complete the production of the first prefabricated insulation board, the second prefabricated insulation board, the third prefabricated insulation board, the prefabricated connecting strips, the first baffle, the second baffle, the third baffle, the fixing components and the protective layer according to the design requirements;

[0029] Complete the meshing of the tank's exterior surface and the positioning of the fixing studs according to design requirements;

[0030] After cleaning the paint on the fixing studs on the outer surface of the tank, weld the fixing studs. The grinding diameter is 20mm to 30mm. The coaxiality tolerance between the actual position of the fixing studs and their positioning position is 3mm. The angle between the fixing studs and the outer surface of the tank is 87° to 93°.

[0031] Within the limited area of ​​the fixing studs on the outer surface of the liquid tank, the first prefabricated insulation panel and the second prefabricated insulation panel are installed and connected to the reinforcement structure through the fixing assembly, and the third prefabricated insulation panel is installed between the first prefabricated insulation panel and the second prefabricated insulation panel to form a modular insulation panel;

[0032] Installing prefabricated connecting strips at the gap between any two adjacent prefabricated insulation panels in the modular insulation panel;

[0033] Fixing a first baffle to the reinforcement structure in a plane parallel to the second surface of the modular insulation panel surrounding the bottom support area, forming a first space between the first baffle, the reinforcement structure, and the modular insulation panel, and spraying polyurethane foam into the first space through the operation hole of the first baffle;

[0034] Fixing a second baffle plate at the intersection of the pressure block fence and the pressure block from the second surface of the modular insulation board to the bottom support area, forming a second space between the first baffle plate, the second baffle plate, and the pressure block fence, and spraying polyurethane foam into the second space through the operation hole of the second baffle plate;

[0035] Fixing a third baffle plate on the side of the pressure block from the second surface of the modular insulation board to form a third space between the third baffle plate, the second baffle plate, the second surface, and the side of the pressure block, and spraying polyurethane foam into the third space through the operation hole of the third baffle plate;

[0036] A protective layer is applied on the second surface of the modular insulation board, the prefabricated connecting strip, the third baffle and the exposed outer surface of the sprayed polyurethane foam. The thickness of the protective layer is between 0.5 mm and 1.5 mm, and the width of the overlapping portion of the protective layer is not less than 25 mm.

[0037] As described above, the thermal insulation system and installation method of the liquid tank bottom support area of ​​the present application have the following beneficial effects:

[0038] The insulation system of the bottom support area of ​​the liquid tank of the present application is provided with a first baffle, a second baffle and a third baffle, and the formed space is filled with polyurethane foam, which is directly shaped without the need for additional cutting, polishing, etc., thereby improving the design and installation efficiency; by combining prefabricated insulation panels with polyurethane foam, the insulation system structure is simplified, the cost of the insulation system is reduced, and the sealing and insulation capacity of the insulation system in the base support area are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Shown is a schematic diagram of the main structure of the liquid tank and bottom support area.

[0040] Figure 2 Shown is a schematic diagram of the three-dimensional structure of the liquid tank and the bottom support area.

[0041] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the insulation system of the bottom support area of ​​the liquid tank according to an embodiment of the present invention.

[0042] Figure 4 Shown is a top view of the structural diagram of the insulation system of the bottom support area of ​​the liquid tank according to an embodiment of the present invention.

[0043] Figure 5 Display as Figure 4 Schematic diagram of the cross-sectional structure along the AA direction.

[0044] Figure 6 It is a schematic diagram of the three-dimensional structure of the insulation system of the bottom support area of ​​the liquid tank according to an embodiment of the present invention without the third baffle installed.

[0045] Figure 7 Shown is a schematic structural diagram of the third baffle in the insulation system of the bottom support area of ​​the liquid tank according to an embodiment of the present invention.

[0046] Figure 8 Shown is a schematic structural diagram of the first prefabricated insulation panel in the insulation system of the bottom support area of ​​the liquid tank according to an embodiment of the present invention.

[0047] Figure 9 Shown is a schematic structural diagram of the second prefabricated insulation panel in the insulation system of the bottom support area of ​​the liquid tank according to an embodiment of the present invention.

[0048] Figure 10 It is a schematic structural diagram of the third prefabricated insulation panel in the insulation system of the bottom support area of ​​the liquid tank according to an embodiment of the present invention.

[0049] Figure 11 It is a schematic structural diagram showing the gaps of the modular insulation panels in the insulation system of the bottom support area of ​​the liquid tank according to an embodiment of the present invention.

[0050] Figure 12 Shown is a schematic structural diagram of the insulation patch in the insulation system of the bottom support area of ​​the liquid tank according to an embodiment of the present invention.

[0051] Figure 13 It is a structural schematic diagram showing the protruding structure in the insulation system of the bottom support area of ​​the liquid tank according to an embodiment of the present invention.

[0052] Figure 14 Shown is a schematic structural diagram of a liquid tank in which the insulation system of the bottom support area of ​​the liquid tank according to an embodiment of the present invention is applicable.

[0053] Component Symbol Description

[0054] 100, liquid tank; 200, base support area; 210, reinforcement structure; 220, pressure block; 230, pressure block fence; 300, modular insulation panel; 301, first prefabricated insulation panel; 302, second prefabricated insulation panel; 303, third prefabricated insulation panel; 310, inner insulation layer; 320, reinforcement layer; 330, outer insulation layer; 331, step structure; 340, protruding structure; 350, elastic connection layer; 360, prefabricated connection strip ; 361, hard connecting strip; 362, elastic connecting strip; 370, insulation patch; 401, first baffle; 402, second baffle; 403, third baffle; 410, operation hole; 500, polyurethane foam; 600, fixing assembly; 601, fixing part; 602, connecting column; 603, fixing stud; 604, nut; 605, washer; 610, reinforcement plate; 620, bending part; 630, insulation plug; 700, protective layer. DETAILED DESCRIPTION

[0055] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0056] See also Figures 1 to 14It should be noted that the illustrations provided in this embodiment are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual embodiments. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0057] like Figure 1 and Figure 2 As shown, the bottom support area 200 of the liquid tank 100 is located at the bottom of the liquid tank 100 and refers to the bottom support structure itself and the planar area of ​​the liquid tank 100 connected thereto. The bottom support area 200 includes a reinforcement structure 210 disposed near the outer surface of the liquid tank 100, a pressure block 220 facing away from the outer surface of the liquid tank 100 and connected to the reinforcement structure 210, and a pressure block fence 230 disposed around the pressure block 220 near the reinforcement structure 210.

[0058] This embodiment provides a thermal insulation system for the bottom support area of ​​the liquid tank, such as Figures 3 to 5 As shown, the insulation system includes a modular insulation panel 300 , a first baffle 401 , a second baffle 402 and a third baffle 403 .

[0059] like Figure 3 and Figure 4 As shown, the modular insulation panel 300 is formed by splicing a plurality of prefabricated insulation panels and is arranged around the reinforcement structure 210. The modular insulation panel 300 includes a first surface and a second surface arranged opposite to each other. The first surface of the modular insulation panel 300 is applied to the outer surface of the liquid tank 100 near the bottom support area 200. A plurality of protrusion structures 340 are provided on the first surface. The protrusion structures 340 can create a gap between the first surface and the outer surface of the liquid tank 100 to form a through annular space, so that the cryogenic liquid cargo leaked after the failure of the main barrier wall is collected in a preset area along this channel. The protrusion structure 340 can have different shapes, for example, Figure 11 As shown, the cross section of the protrusion structure 340 can be square, rectangular, circular or triangular, and it protrudes from the first surface of the modular insulation board 300 close to the outer surface of the liquid tank 100. The second surface of the modular insulation board 300 is set away from the outer surface of the liquid tank 100.

[0060] like Figure 5 As shown, the first baffle 401 is disposed on the second surface of the modular insulation panel 300 near the reinforcement structure 210 , and a first space is formed between the first baffle 401 , the reinforcement structure 210 , and the modular insulation panel 300 , and the first space is filled with polyurethane foam 500 .

[0061] The second baffle 402 is set at a certain angle to the second surface of the modular insulation panel 300. One end of the second baffle 402 is connected to the outer edge of the first baffle 401, and the other end is connected to the intersection of the pressure block fence 230 and the pressure block 220. A second space is formed between the first baffle 401, the second baffle 402, and the pressure block fence 230, and the second space is filled with polyurethane foam 500.

[0062] One end of the third baffle 403 is connected to the second surface of the modular insulation panel 300 located outside the second baffle 402, and the other end is connected to the side of the pressure block 220. A third space is formed between the third baffle 403, the second baffle 402, the second surface of the modular insulation panel 300, and the side of the pressure block 220, and the third space is filled with polyurethane foam 500.

[0063] Since the polyurethane foam 500 is difficult to mold or has an irregular shape after molding, additional processing is required, including cutting, polishing, surface protection, etc. In this embodiment, by setting the first baffle 401, the second baffle 402, and the third baffle 403, the polyurethane foam 500 is directly molded in the baffle, which can save the process time of cutting and surface protection and improve the design and installation efficiency.

[0064] This embodiment provides a thermal insulation system for the bottom support area of ​​the liquid tank. The modular insulation panels 300 provide a stable insulation framework, while the polyurethane foam 500 fills gaps within the complex structure. This simplifies the insulation system's construction, improves design and installation efficiency, reduces system costs, and enhances the sealing and insulation capabilities of the bottom support area. This insulation system is highly integrated and can provide excellent insulation performance in low-temperature environments.

[0065] As an implementation method, Figure 5 As shown, the third baffle 403 includes a vertical connecting section, an inclined connecting section, and a horizontal connecting section connected in sequence. One end of the vertical connecting section is connected to the second surface of the modular insulation panel 300, one end of the vertical connecting section is connected to one end of the inclined connecting section, the other end of the inclined connecting section is connected to one end of the horizontal connecting section, and the other end of the horizontal connecting section is connected to the side of the pressure block 220. This ensures the thermal insulation effect of the insulation system while saving the amount of polyurethane foam used, reducing the cost of the insulation system.

[0066] As an implementation method, Figure 3 、 Figure 4 、 Figure 6 and Figure 7As shown, the first baffle 401, the second baffle 402, and the third baffle 403 are each provided with an operation hole 410. The operation holes 410 are provided to facilitate spraying polyurethane foam 500 into the first, second, and third spaces. After the polyurethane foam 500 solidifies, its outer surface is polished until it is flat. The polyurethane foam 500 at the corresponding position is flush with the outer surfaces of the first baffle 401, the second baffle 402, and the third baffle 403. The operation holes 410 can be shaped, for example, circular, square, oval, rectangular, or the like.

[0067] As an implementation method, Figure 5 As shown, the height difference L between the connection point between the third baffle 403 and the pressure block 220 and the surface of the pressure block 220 facing away from the reinforcement structure 210 is between 5 mm and 100 mm. Alternatively, the height difference L can be any value among 5 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, and 100 mm, or a value selected between any two of the above values.

[0068] As a real-time method, Figure 5 As shown, the distance T between the connection between the third baffle 403 and the second surface of the modular insulation panel 300 and the connection between the second baffle 402 and the first baffle 401 is not less than 50 mm. This improves the connection strength between the third baffle 403 and the second surface of the modular insulation panel 300.

[0069] As an implementation method, Figure 3 、 Figure 4 、 Figure 6 、 Figures 8 to 10 As shown, the modular insulation panel 300 includes a first prefabricated insulation panel 301, a second prefabricated insulation panel 302 and a third prefabricated insulation panel 303. The first prefabricated insulation panel 301 and the second prefabricated insulation panel 302 are arranged adjacent to the reinforcement structure 210, and the third prefabricated insulation panel 303 is filled between the first prefabricated insulation panel 301 and the second prefabricated insulation panel 302. The first prefabricated insulation panel 301, the second prefabricated insulation panel 302 and the third prefabricated insulation panel 303 are spliced ​​to form a plate shape. Specifically, as shown in FIG. Figure 3 、 Figure 4 and Figure 6 As shown, the modular insulation panel 300 includes two first prefabricated insulation panels 301, two second prefabricated insulation panels 302 and four third prefabricated insulation panels 303. The two first prefabricated insulation panels 301 are relatively arranged on two sides of the reinforcement structure 210, the two second prefabricated insulation panels 302 are relatively arranged on the other two sides of the reinforcement structure 210, and the four third prefabricated insulation panels 303 are respectively arranged between the first prefabricated insulation panels 301 and the second prefabricated insulation panels 302. The formed modular insulation panel 300 is a plate-like structure.

[0070] like Figure 5 、 Figures 8 to 10 As shown, the first prefabricated insulation board 301, the second prefabricated insulation board 302, and the third prefabricated insulation board 303 each include an inner insulation layer 310, a reinforcement layer 320, and an outer insulation layer 330 stacked in sequence. The surface of the inner insulation layer 310 close to the liquid tank 100 is a first surface, and the surface of the outer insulation layer 330 facing away from the reinforcement layer 320 is a second surface.

[0071] As an implementation method, Figures 8 to 10 As shown, the surface of the inner insulation layer 310 adjacent to the reinforcement layer 320 is larger than the surface of the reinforcement layer 320 adjacent to the inner insulation layer 310. The surface of the reinforcement layer 320 adjacent to the outer insulation layer 330 is consistent with the surface of the outer insulation layer 330 adjacent to the reinforcement layer 320. The area of ​​the first surface is larger than the area of ​​the second surface. Thus, the side surfaces of the first prefabricated insulation panel 301, the second prefabricated insulation panel 302, and the third prefabricated insulation panel 303 can form a stepped structure, facilitating the subsequent connection between the fixing assembly 600 and the interior of the modular insulation panel 300.

[0072] like Figure 5 As shown, a surface of the outer insulation layer 330 facing away from the reinforcement layer 320 is provided with a step structure 331 .

[0073] like Figure 11 As shown, an elastic connecting layer 350 is provided at the gap between adjacent inner insulation layers 310 .

[0074] like Figure 3 、 Figure 4 and Figure 6 As shown, prefabricated connecting strips 360 are provided at the gaps between adjacent outer insulation layers 330. The prefabricated connecting strips 360 are provided with a structure adapted to the step structure 331 to improve the sealing and connection strength between the adjacent outer insulation layers 330 by the prefabricated connecting strips 360.

[0075] As an implementation method, Figure 6 、 Figure 8 and Figure 9 As shown, insulation patches 370 are provided on the second surface of the outer insulation layer 330 of the first prefabricated insulation board 301 and on the second surface of the outer insulation layer 330 of the second prefabricated insulation board 302 near the edge of the reinforcement structure 210 .

[0076] The insulating patch 370 can be in different shapes, such as Figure 12 The shapes shown are all acceptable and can be designed according to actual process requirements.

[0077] As an embodiment, fixing components 600 are provided in the gaps between adjacent inner insulation layers 310 and between the inner insulation layer 310 and the reinforcement structure 210 corresponding to the position of the insulation patch 370, and an elastic connecting layer 350 is provided between the fixing component 600 and the inner insulation layer 310.

[0078] like Figure 11 As shown, the fixing assembly 600 includes a fixing member 601, a connecting column 602, a fixing stud 603, a nut 604, and a washer 605. Both ends of the connecting column 602 are provided with internal threads. The fixing member 601 is connected to one end of the connecting column 602 via a nut 604 and a washer 605. The other end of the connecting column 602 is threadedly connected to one end of the fixing stud 603. The other end of the fixing stud 603 is connected to the fixing stud location on the outer surface of the liquid tank 100. The fixing assembly 600 can secure the complex modular insulation panel 300, reduce the difficulty of processing and installing the insulation system, and improve the quality and reliability of the insulation system.

[0079] The fixing member 601 includes a reinforcing plate 610, a bent portion 620, a cavity portion, and a connecting portion. The cavity portion is provided with a hollow cavity, in which an insulating plug 630 is provided. Two bent portions 620 are arranged oppositely on both sides of one end of the cavity portion. The reinforcing plate 610 is arranged on the surface of the bent portion 620 facing away from the cavity portion. At least one bent portion 620 abuts against the surface of the inner insulation layer 310 close to the reinforcing layer 320 (i.e., the bent portion 620 can be arranged on the stepped structure of the side of the adjacent prefabricated insulation board); the connecting portion is arranged at the other end of the cavity portion, and the connecting portion is fastened to the connecting column 602 by a nut 604 and a washer 605. As a specific embodiment, the combined structure of the cavity portion and the connecting portion of the fixing member 601 is U-shaped, and the two bent portions 620 are arranged on both sides of the U-shaped opening and are perpendicular to the opening. The reinforcing plate 610 extends from one bent portion 620 through the cavity portion to cover the other bent portion 620. The reinforcing plate 610 can prevent the fixing member 601 from shrinking and deforming inward, strengthen the fixing member 601 , and limit the deformation of the fixing member 601 .

[0080] As an implementation method, Figure 11 As shown, the prefabricated connecting strips 360 include rigid connecting strips 361 and elastic connecting strips 362. Rigid connecting strips 361 are installed in the gaps between adjacent outer insulation layers 330. Elastic connecting strips 362 are also installed between the rigid connecting strips 361 and the outer insulation layers 330, between the rigid connecting strips 361 and the reinforcement layer 210, and between the stepped structures 331 of adjacent outer insulation layers 330. The prefabricated connecting strips 360 allow any two adjacent prefabricated insulation panels in different areas to be tightly connected.

[0081] As an implementation method, Figure 3 、 Figure 6 and Figure 11 As shown, the second surface of the modular insulation board 300 and the outer surface of the third baffle 403 are both provided with a protective layer 700. The protective layer 700 can enhance the insulation system of the liquid tank 100's protection, waterproofness, and anti-vibration properties to the external environment.

[0082] As an implementation method, Figure 14 As shown, the shape of the liquid tank 100 can be a prismatic tank, a special-shaped tank, a spherical tank, a square tank, etc. The material of the liquid tank 100 can be selected from a low-temperature metal material such as nickel steel, high-manganese steel, aluminum alloy, etc. The material of the bottom support is consistent with that of the liquid tank 100. The pressure block 220 is composed of one or more laminated wood and composite materials.

[0083] As an embodiment, the inner insulation layer 310, outer insulation layer 330, insulation patch 370, insulation plug 630, protruding structure 340, and rigid connecting strip 361 can all be composed of one or more insulation materials and reinforcing materials. Insulation materials include, but are not limited to, polyurethane foam, polystyrene foam, polyethylene foam, phenolic foam, polyimide foam, and aerogel, while reinforcing materials include, but are not limited to, glass fiber and hollow glass microspheres. The insulation materials mentioned below can all be composed of the materials listed above and are not further described.

[0084] As an embodiment, the materials of the first baffle 401 , the second baffle 420 , and the third baffle 403 are selected from one or more of butyl tape, wood board, and thermal insulation material.

[0085] In one embodiment, the inner insulation layer 310, the reinforcement layer 320, and the outer insulation layer 330 are bonded together using a low-temperature adhesive. The reinforcement layer 320 is composed of one or more mesh materials selected from one or more of glass fiber aluminum foil mesh, carbon fiber mesh, and metal mesh.

[0086] As an embodiment, the elastic connecting layer 350 and the elastic connecting strip 362 are composed of one or more elastic insulation materials, and the elastic insulation material is selected from one or more of glass wool, polyurethane foam, melamine foam, ethylene-vinyl acetate copolymer foam, polyethylene foam, polypropylene foam and polyimide foam.

[0087] As an embodiment, the protective layer 700 is composed of a thermoplastic polyolefin elastomer and a flexible fireproof layer. The thermoplastic polyolefin elastomer is made of polyolefin resin materials such as polypropylene or polyethylene, and the flexible fireproof layer is selected from one or more of ceramic fiber cloth, glass fiber aluminum foil cloth and aluminum silicate fiber felt.

[0088] This embodiment also provides a method for installing a thermal insulation system in the support area at the bottom of a liquid tank, comprising the following steps:

[0089] S100: Complete the production of the first prefabricated insulation board 301, the second prefabricated insulation board 302, the third prefabricated insulation board 303, the prefabricated connecting strip 360, the first baffle 401, the second baffle 402, the third baffle 403, the fixing assembly 600, and the protective layer 700 according to the design requirements;

[0090] S200, completing the meshing of the outer surface of the liquid tank 100 and the positioning of the fixing studs 603 according to the design requirements;

[0091] S300: Grind away the paint on the outer surface of the liquid tank 100 at the fixed stud location and weld the fixed stud 603. The grinding diameter is 30 mm. The coaxiality tolerance between the actual position of the fixed stud 603 and its location is 3 mm. The angle between the fixed stud 603 and the outer surface of the liquid tank 100 is 90°.

[0092] S400: Within the area defined by the fixing studs 603 on the outer surface of the liquid tank 100, the first prefabricated insulation panel 301 and the second prefabricated insulation panel 302 are mounted on the reinforcement structure 210 using the fixing assembly 600, and the third prefabricated insulation panel 303 is mounted between the first prefabricated insulation panel 301 and the second prefabricated insulation panel 302 to form a modular insulation panel 300.

[0093] S500, installing prefabricated connecting strips 360 at the gap between any two adjacent prefabricated insulation panels in the modular insulation panel 300;

[0094] S600: In a plane parallel to the second surface of the modular insulation panel 300 surrounding the bottom support area 200, the first baffle 401 is fixed to the reinforcement structure 210, forming a first space between the first baffle 401, the reinforcement structure 210, and the modular insulation panel 300. Polyurethane foam 500 is sprayed into the first space through the operation hole 410 of the first baffle 401.

[0095] S700: Fix the second baffle 402 to the intersection of the pressure block fence 230 and the pressure block 220 on the second surface of the modular insulation panel 300 to the bottom support area 200. A second space is formed between the first baffle 401, the second baffle 402, and the pressure block fence 230. Spray polyurethane foam 500 into the second space through the operation hole 410 of the second baffle 402.

[0096] S800: Fix the third baffle 403 between the second surface of the modular insulation panel 300 and the side of the pressure block 220. A third space is formed between the third baffle 403, the second baffle 402, the second surface, and the side of the pressure block 220. Spray polyurethane foam 500 into the third space through the operation hole 410 of the third baffle 403.

[0097] S900, laying a protective layer 700 on the second surface of the modular insulation panel 300, the prefabricated connecting strip 360, the third baffle 403 and the exposed outer surface of the spray polyurethane foam 500, the thickness of the protective layer 700 is 1.5 mm, and the width of the overlapping part of the protective layer 700 is 30 mm.

[0098] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A thermal insulation system for a bottom support area of ​​a liquid tank, wherein the bottom support area is arranged at the bottom of the liquid tank, and comprises a reinforcement structure arranged near the outer surface of the liquid tank, a pressure block facing away from the outer surface of the liquid tank and connected to the reinforcement structure, and a pressure block fence arranged around the pressure block near the reinforcement structure, characterized in that: The insulation system includes: a modular insulation panel formed by splicing a plurality of prefabricated insulation panels and arranged around the reinforcement structure, the modular insulation panel including a first surface and a second surface arranged opposite to each other, the first surface being applied to the outer surface of the liquid tank near the bottom support area and having a protruding structure arranged on the first surface, and the second surface being arranged away from the outer surface of the liquid tank; a first baffle disposed on the second surface close to the reinforcement structure, wherein a first space is formed between the first baffle, the reinforcement structure, and the modular insulation panel, and the first space is filled with polyurethane foam; a second baffle, one end of which is connected to the edge of the first baffle, and the other end of which is connected to the intersection of the pressure block fence and the pressure block, wherein a second space is formed between the first baffle, the second baffle, and the pressure block fence, and the second space is filled with polyurethane foam; A third baffle has one end connected to the second surface located outside the second baffle, and the other end connected to the side of the pressure block. A third space is formed between the third baffle, the second baffle, the second surface, and the side of the pressure block, and the third space is filled with polyurethane foam.

2. The thermal insulation system for the bottom support area of ​​the liquid tank according to claim 1, characterized in that: The third baffle includes a vertical connecting section, an inclined connecting section and a horizontal connecting section connected in sequence, one end of the vertical connecting section is connected to the second surface, and one end of the horizontal connecting section is connected to the side of the pressure block.

3. The thermal insulation system for the bottom support area of ​​the liquid tank according to claim 1 or 2, characterized in that: The first baffle, the second baffle, and the third baffle are all provided with operation holes.

4. The thermal insulation system for the bottom support area of ​​a liquid tank according to claim 1 or 2, characterized in that: The height difference between the connection between the third baffle and the pressure block and the surface of the pressure block away from the reinforcement structure is between 5 mm and 100mm.

5. The thermal insulation system for the bottom support area of ​​the liquid tank according to claim 1, characterized in that: The distance between the connection point between the third baffle and the second surface and the connection point between the second baffle and the first baffle is not less than 50 mm.

6. The thermal insulation system for the bottom support area of ​​a liquid tank according to claim 1, characterized in that: The modular insulation panel includes a plurality of first prefabricated insulation panels, a plurality of second prefabricated insulation panels, and a plurality of third prefabricated insulation panels, wherein the first prefabricated insulation panels and the second prefabricated insulation panels are located at the reinforcement structure, and the third prefabricated insulation panels are filled between the first prefabricated insulation panels and the second prefabricated insulation panels, and the first prefabricated insulation panels, the second prefabricated insulation panels, and the third prefabricated insulation panels are spliced ​​to form a plate shape; The first prefabricated insulation board, the second prefabricated insulation board, and the third prefabricated insulation board all include an inner insulation layer, a reinforcement layer, and an outer insulation layer stacked in sequence. The surface of the inner insulation layer close to the liquid tank is the first surface, and the surface of the outer insulation layer away from the reinforcement layer is the second surface.

7. The thermal insulation system for the bottom support area of ​​the liquid tank according to claim 6, characterized in that: The surface of the inner heat-insulating layer adjacent to the reinforcing layer is larger in area than the surface of the reinforcing layer adjacent to the inner heat-insulating layer; the surface of the reinforcing layer adjacent to the outer heat-insulating layer is consistent with the surface of the outer heat-insulating layer adjacent to the reinforcing layer; the area of ​​the first surface is larger than the area of ​​the second surface; the surface of the outer heat-insulating layer facing away from the reinforcing layer is provided with a step structure; An elastic connecting layer is provided at the gap between adjacent inner insulation layers; Prefabricated connecting strips are provided at the gaps between adjacent outer insulation layers.

8. The thermal insulation system for the bottom support area of ​​a liquid tank according to claim 7, characterized in that: Insulation patches are provided on the second surface of the first prefabricated insulation board and the second surface of the second prefabricated insulation board near the edge of the reinforcement structure.

9. The thermal insulation system for the bottom support area of ​​a liquid tank according to claim 8, characterized in that: A fixing component is provided at the gap between adjacent inner insulation layers and between the inner insulation layer corresponding to the insulation patch and the reinforcement structure, and the elastic connecting layer is provided between the fixing component and the inner insulation layer; The fixing assembly includes a fixing piece, a connecting column, a fixing stud, a nut and a washer, wherein the fixing piece is connected to one end of the connecting column through the nut and the washer, the other end of the connecting column is threadedly connected to one end of the fixing stud, and the other end of the fixing stud is connected to the fixing stud positioning portion on the outer surface of the liquid tank; The fixing part includes a reinforcing plate, a bending portion, a cavity portion and a connecting portion. The cavity portion is provided with a hollow cavity, and an insulating plug is provided in the cavity; the two bending portions are relatively arranged on both sides of the cavity portion, the reinforcing plate is arranged on the surface of the bending portion away from the cavity portion, and at least one of the bending portions abuts against the surface of the inner insulation layer close to the reinforcing layer; the connecting portion is arranged at the other end of the cavity portion, and the connecting portion is connected to the connecting column.

10. The thermal insulation system for the bottom support area of ​​a liquid tank according to claim 7, characterized in that: The prefabricated connecting strips include hard connecting strips and elastic connecting strips; The hard connecting strips are arranged at the gaps between adjacent outer insulation layers; The elastic connecting strips are arranged between the hard connecting strip and the outer heat-insulating layer, between the hard connecting strip and the reinforcing layer, and between the step structures of adjacent outer heat-insulating layers.

11. The thermal insulation system for the bottom support area of ​​a liquid tank according to claim 1, characterized in that: The second surface of the modular insulation panel and the outer surface of the third baffle are both provided with a protective layer.

12. A method for installing a thermal insulation system in the support area at the bottom of a liquid tank, characterized in that: The following steps are involved: Complete the production of the first prefabricated insulation board, the second prefabricated insulation board, the third prefabricated insulation board, the prefabricated connecting strips, the first baffle, the second baffle, the third baffle, the fixing components and the protective layer according to the design requirements; Complete the meshing of the tank's outer surface and the positioning of the fixing studs according to design requirements; After cleaning the paint on the fixing studs on the outer surface of the tank, weld the fixing studs. The grinding diameter is 20mm to 30mm. The coaxiality tolerance between the actual position of the fixing studs and their positioning position is 3mm. The angle between the fixing studs and the outer surface of the tank is 87° to 93°. Within the limited area of ​​the fixing studs on the outer surface of the liquid tank, the first prefabricated insulation panel and the second prefabricated insulation panel are installed and connected to the reinforcement structure through the fixing assembly, and the third prefabricated insulation panel is installed between the first prefabricated insulation panel and the second prefabricated insulation panel to form a modular insulation panel; Installing prefabricated connecting strips at the gap between any two adjacent prefabricated insulation panels in the modular insulation panel; Fixing a first baffle to the reinforcement structure in a plane parallel to the second surface of the modular insulation panel surrounding the bottom support area, forming a first space between the first baffle, the reinforcement structure, and the modular insulation panel, and spraying polyurethane foam into the first space through the operation hole of the first baffle; Fixing a second baffle plate at the intersection of the pressure block fence and the pressure block from the second surface of the modular insulation board to the bottom support area, forming a second space between the first baffle plate, the second baffle plate, and the pressure block fence, and spraying polyurethane foam into the second space through the operation hole of the second baffle plate; Fixing a third baffle plate on the side of the pressure block from the second surface of the modular insulation board to form a third space between the third baffle plate, the second baffle plate, the second surface, and the side of the pressure block, and spraying polyurethane foam into the third space through the operation hole of the third baffle plate; A protective layer is applied on the second surface of the modular insulation board, the prefabricated connecting strip, the third baffle and the exposed outer surface of the sprayed polyurethane foam. The thickness of the protective layer is between 0.5 mm and 1.5 mm, and the width of the overlapping portion of the protective layer is not less than 25 mm.

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