Marine wide-temperature-range high-strength high-heat-insulation fireproof heat preservation structure and construction method

Abstract

The invention relates to the technical field of heat preservation materials, and discloses a marine wide-temperature-range high-strength high-heat-insulation fireproof heat preservation structure which comprises a first vacuum heat insulation layer, a second vacuum heat insulation layer, an aerogel layer and a protection layer which are sequentially arranged from bottom to top, the first vacuum heat insulation layer is located at the top end of a base material, and adhesive layers are arranged at the top end and the bottom end of the first vacuum heat insulation layer; the mounting piece is arranged on the base material and the first vacuum heat insulation layer, the first vacuum heat insulation layer is in limiting connection with the base material through the mounting piece, and the mounting piece on the first vacuum heat insulation layer sequentially penetrates through the second vacuum heat insulation layer, the aerogel layer and the protective layer and is in limiting connection with the second vacuum heat insulation layer; the first vacuum heat insulation layer comprises a plurality of first vacuum heat insulation plates, the second vacuum heat insulation layer comprises a plurality of second vacuum heat insulation plates, and the first vacuum heat insulation plates and the second vacuum heat insulation plates are in lap joint in a staggered mode through installation pieces. The thermal insulation structure provided by the invention has the advantages of being suitable for a low-temperature environment, small in thickness, light in weight, high in strength, excellent in fireproof performance and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal insulation materials, and particularly to a marine wide-temperature-range high-strength, high-insulation, fireproof and thermal insulation structure and a construction method thereof. Background Art

[0002] With the climate warming, a large amount of ice sheets in the polar regions have melted, increasing the possibility of opening polar sea lanes. Many countries in the world have started to research key technologies for polar ships and began to build a large number of polar ships. To adapt to the environment of short-time wide temperature range and humidity change faced by polar ships, more stringent requirements are put forward for the heat insulation performance, reliability, etc. of marine thermal insulation materials. For the navigation environment from the equator to the poles, there are various harsh conditions such as high and low temperatures, ice and snow, salt fog, strong ultraviolet rays, and wind loads. Marine thermal insulation materials for polar ships face huge challenges in such a harsh service environment. At present, rock wool boards are used as marine thermal insulation materials in China, which can meet the thermal insulation requirements of most sea routes. Rock wool boards are used as thermal insulation structures on the already-serviced polar ships. However, rock wool boards are not resistant to thermal cycling and are difficult to be applied to the sea routes from the equator to the poles of ships. At present, there is also a lack of research and application of thermal insulation materials in the wide temperature range of -70°C to 50°C.

[0003] Therefore, there is an urgent need for a marine wide-temperature-range high-strength, high-insulation, fireproof and thermal insulation structure and a construction method thereof to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a marine wide-temperature-range high-strength, high-insulation, fireproof and thermal insulation structure and a construction method thereof to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above purpose, the present invention provides the following solution: The present invention provides a marine wide-temperature-range high-strength, high-insulation, fireproof and thermal insulation structure, including:

[0006] A first vacuum insulation layer, a second vacuum insulation layer, an aerogel layer and a protective layer arranged in sequence from bottom to top. The first vacuum insulation layer is located at the top of the base material, and adhesive layers are provided at both the top and the bottom of the first vacuum insulation layer;

[0007] Mounting members, which are arranged on the base material and the first vacuum insulation layer. The first vacuum insulation layer is connected to the base material in a limited way through the mounting members, and the mounting members on the first vacuum insulation layer sequentially penetrate through the second vacuum insulation layer, the aerogel layer and the protective layer and are connected in a limited way;

[0008] The first vacuum insulation layer includes a plurality of first vacuum insulation boards, the second vacuum insulation layer includes a plurality of second vacuum insulation boards, and the plurality of first vacuum insulation boards and the plurality of second vacuum insulation boards are staggered and overlapped through the mounting members.

[0009] A marine wide-temperature-range high-strength, high heat-insulation, fireproof and heat-preservation structure provided by the present invention, wherein the first vacuum insulation panel comprises an insulation core board, a barrier film bag is coated on the outer wall of the insulation core board, a skin is coated on the outer wall of the barrier film bag, and the installation member is arranged in the insulation core board.

[0010] A marine wide-temperature-range high-strength, high heat-insulation, fireproof and heat-preservation structure provided by the present invention, wherein the installation member comprises a stud, one end of the stud is fixedly connected to the substrate and inside the insulation core board, and a buckle and a stud cap are installed at the other end of the stud through the first vacuum insulation panel, the second vacuum insulation panel and the aerogel layer.

[0011] A marine wide-temperature-range high-strength, high heat-insulation, fireproof and heat-preservation structure provided by the present invention, wherein the adhesive layer is an adhesive, and adhesives are provided between the first vacuum insulation panel and the substrate and between the first vacuum insulation panel and the second vacuum insulation panel.

[0012] A marine wide-temperature-range high-strength, high heat-insulation, fireproof and heat-preservation structure provided by the present invention, wherein the thicknesses of the first vacuum insulation layer and the second vacuum insulation layer are both ≤ 5 mm, the density is ≤ 300 kg / m3, the thermal conductivity is ≤ 0.008 W / m·K, and the compressive strength is ≥ 50 kPa.

[0013] A marine wide-temperature-range high-strength, high heat-insulation, fireproof and heat-preservation structure provided by the present invention, wherein the aerogel layer is a silicon carbide nano-modified aerogel felt, the thickness of the aerogel felt is ≤ 10 mm, the density of the aerogel felt decreases from 150 kg / m 3 on the substrate side to 80 kg / m 3 on the protective layer side, and the thermal conductivity is ≤ 0.025 W / m·K.

[0014] A marine wide-temperature-range high-strength, high heat-insulation, fireproof and heat-preservation structure provided by the present invention, wherein the protective layer is a flame-retardant white cloth or a fiberglass cloth, and a graphene-modified flame-retardant coating is applied on the surface.

[0015] A marine wide-temperature-range high-strength, high heat-insulation, fireproof and heat-preservation structure provided by the present invention, wherein the adhesive is a nano-organosilicon-modified adhesive, a nano-scale silica functional filler is added, and the viscosity range is 6000 Pa·S - 8000 Pa·S.

[0016] A construction method of a marine wide-temperature-range high-strength, high heat-insulation, fireproof and heat-preservation structure comprises the following steps:

[0017] Clean the surface of the substrate;

[0018] Position the installation member and fix it on the surface of the substrate through a tooling mold, and install the first vacuum insulation layer on the surface of the substrate and limit the connection with the installation member;

[0019] The second vacuum insulation layer, the aerogel layer and the protective layer are successively installed on the first vacuum insulation layer and are in limit connection with the mounting parts on the first vacuum insulation layer;

[0020] A fire retardant coating is brushed on the protective layer.

[0021] According to a construction method of a marine wide-temperature-range high-strength, high-insulation, fireproof and heat-preserving structure provided by the present invention, the tooling die includes slats, the slats are fixedly connected to the base material, a plurality of through holes are formed in the slats, and the plurality of through holes respectively correspond to a plurality of stud nails on the base material one by one. A nut is fixedly connected below the through hole, a bolt is threadedly connected in the nut, and the bolt abuts against the stud nail.

[0022] Compared with the prior art, the present invention has the following advantages and technical effects:

[0023] A marine wide-temperature-range high-strength, high-insulation, fireproof and heat-preserving structure and a construction method provided by the present invention. The structure successively includes a first vacuum insulation board, a second vacuum insulation board, an aerogel layer and a protective layer from bottom to top. The two layers of vacuum insulation boards can be laid in an overlapping manner during construction. This technical solution and the measure of setting the mounting parts avoid heat bridges. Generally, traditional rock wool boards are fixed with the assistance of insulation nails, and heat is easily transferred from the insulation nails. The density gradient of the aerogel layer can avoid sudden changes in thermal impedance at the interface and reduce the risk of cracking caused by thermal stress. The adhesive layer has good elasticity in a wide temperature range of -70°C to 60°C and is suitable for environments with a wide temperature range and resistant to thermal cycling. The heat-preserving structure provided by this application has the advantages of being applicable to low-temperature environments, having a small thickness, a light weight, high strength, and excellent fireproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts:

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the first vacuum insulation board of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the tooling die of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0029] Figure 5 It is a schematic structural diagram of the third embodiment of the present invention;

[0030] Among them, 1 is the first vacuum insulation panel; 101 is the insulation core panel; 102 is the barrier film bag; 103 is the skin; 2 is the second vacuum insulation panel; 3 is the aerogel layer; 4 is the protective layer; 5 is the adhesive; 6 is the stud; 7 is the buckle; 8 is the stud cap; 9 is the slat; 10 is the nut; 11 is the bolt. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] Embodiment 1:

[0034] Referring to Figures 1 - 3 , the present invention provides a marine wide-temperature-range high-strength, high-insulation, fireproof, and heat-insulating structure, including:

[0035] A first vacuum insulation layer, a second vacuum insulation layer, an aerogel layer 3, and a protective layer 4 are arranged in sequence from bottom to top. The first vacuum insulation layer is located at the top of the substrate, and adhesive layers are provided at both the top and bottom of the first vacuum insulation layer;

[0036] Mounting members are provided on the substrate and the first vacuum insulation layer. The first vacuum insulation layer is connected to the substrate in a limited position through the mounting members, and the mounting members on the first vacuum insulation layer sequentially penetrate through the second vacuum insulation layer, the aerogel layer 3, and the protective layer 4 and are connected in a limited position;

[0037] The first vacuum insulation layer includes a plurality of first vacuum insulation panels 1, the second vacuum insulation layer includes a plurality of second vacuum insulation panels 2, and the plurality of first vacuum insulation panels 1 and the plurality of second vacuum insulation panels 2 are staggered and overlapped through the mounting members.

[0038] In an embodiment of the present application, the structure includes a first vacuum insulation panel 1, a second vacuum insulation panel 2, an aerogel layer 3, and a protective layer 4 from bottom to top. The two vacuum insulation panels can be laid in a staggered and overlapping manner during construction. This technical solution and the measures for setting installation parts avoid thermal bridges. Generally, traditional rock wool boards are fixed with the assistance of insulation nails, and heat is easily transferred from the insulation nails. The density of the aerogel layer 3 changes gradually to avoid sudden changes in thermal impedance at the interface and reduce the risk of cracking caused by thermal stress. The adhesive layer has good elasticity in a wide temperature range of -70°C to 60°C and is suitable for environments with a wide temperature range and resistance to thermal cycling.

[0039] As an alternative implementation, the first vacuum insulation panel 1 includes an insulating core board 101, a barrier film bag 102 is coated on the outer wall of the insulating core board 101, a skin 103 is coated on the outer wall of the barrier film bag 102, and installation parts are arranged inside the insulating core board 101.

[0040] In an embodiment of the present application, the first vacuum insulation panel 1 is composed of an insulating core board 101, a barrier film bag 102, and a skin 103. The insulating core board 101 is added with a getter. The inner wall of the barrier film bag 102 is coated with a gas-phase silica nano-coating. During pressing, the installation parts are fixed in the middle of the insulating core board 101, and the two are regarded as a whole. Then, the insulating core board 101 is placed into the barrier film bag 102, the perforation at the pre-buried installation part is sealed with an adhesive 5, the barrier film bag 102 is reserved with an air extraction hole, the barrier film bag 102 is pumped to a high vacuum, and the air extraction port is heat-sealed to complete the final seal. The outer part of the barrier film bag 102 is wrapped with a skin 103.

[0041] As an alternative implementation, the installation parts include a stud 6. One end of the stud 6 is fixedly connected to the substrate and inside the insulating core board 101. A buckle 7 and a stud cap 8 are installed at the other end of the stud 6 through the first vacuum insulation panel 1, the second vacuum insulation panel 2, and the aerogel layer 3.

[0042] In an embodiment of the present application, the stud 6 is pre-buried during the production of the first vacuum insulation panel 1, and the second vacuum insulation panel 2 can be fixed by using the pre-buried stud 6, so that the two vacuum insulation panels can be laid in a staggered and overlapping manner during construction.

[0043] As an alternative implementation, the adhesive layer is an adhesive 5, and the adhesive 5 is provided between the first vacuum insulation panel 1 and the substrate and between the first vacuum insulation panel 1 and the second vacuum insulation panel 2.

[0044] In an embodiment of the present application, a nano-organic silicon modified adhesive is used. By adding nano-scale silica functional fillers, the adhesive has good elasticity in a wide temperature range of -70°C to 60°C and is suitable for environments with a wide temperature range and resistance to thermal cycling.

[0045] As an alternative embodiment, the thicknesses of the first vacuum insulation layer and the second vacuum insulation layer are both ≤ 15 mm, the density is ≤ 300 kg / m3, the thermal conductivity is ≤ 0.008 W / m·K, and the compressive strength is ≥ 50 kPa.

[0046] In an embodiment of the present application, the thermal insulation structure provided by the present invention has excellent heat insulation and heat preservation effects, a thinner structure thickness, and a lighter weight. Taking 160 mm rock wool as a comparison object, the conduction thermal resistance of each square meter of rock wool board is 4 K / W, the structure thickness is 160 mm, and the weight is 12.8 kg; this thermal insulation structure is calculated as 10 mm vacuum insulation board + 10 mm vacuum insulation board + 10 mm aerogel felt, and the conduction thermal resistance per square meter is 4.1 K / W, the structure thickness is 30 mm, and the weight does not exceed 6.5 kg. From the comparison, it can be seen that this thermal insulation structure has obvious advantages in terms of heat insulation, structure thickness, and lightweight. Further, the thermal insulation structure provided by the present invention uses a vacuum insulation board, and its compressive strength is not less than 50 kPa, which is also higher than 30 kPa of the general rock wool board for thermal insulation purposes.

[0047] As an alternative embodiment, the aerogel layer 3 is a silicon carbide nano-modified aerogel felt, the thickness of the aerogel felt is ≤ 10 mm, and the density of the aerogel felt decreases from 150 kg / m 3 on the substrate side to 80 kg / m 3 on the protective layer 4 side, and the thermal conductivity is ≤ 0.025 W / m·K.

[0048] In an embodiment of the present application, the aerogel layer 3 is preferably a silicon carbide nano-modified aerogel felt.

[0049] As an alternative embodiment, the protective layer 4 is a flame-retardant white cloth or a fiberglass cloth, and a graphene-modified flame-retardant coating is applied on the surface.

[0050] In an embodiment of the present application, the protective layer 4 is preferably one of a flame-retardant white cloth or a fiberglass cloth.

[0051] As an alternative embodiment, the adhesive 5 is a nano-organosilicon modified adhesive, adding a nano-scale silica functional filler, and the viscosity range is 6000 Pa·S - 8000 Pa·S.

[0052] In an embodiment of the present application, the adhesive 5 is a nano-organosilicon modified adhesive, adding a nano-scale silica functional filler, and has good elasticity in the temperature range of -70°C - 60°C.

[0053] A construction method for a marine wide-temperature-range high-strength, high-insulation, fireproof and heat-insulating structure includes the following steps:

[0054] Clean the surface of the substrate;

[0055] Position the installation part and fix it on the surface of the base material through the tooling die. Install the first vacuum insulation layer on the surface of the base material and connect it with the installation part in a limited position.

[0056] Install the second vacuum insulation layer, the aerogel layer 3 and the protective layer 4 on the first vacuum insulation layer in sequence, and connect them with the installation part on the first vacuum insulation layer in a limited position.

[0057] Brush the flame retardant coating on the protective layer 4.

[0058] In an embodiment of the present application, during use, clean and polish the surface of the base material to be bonded, mark and position the stud 6 according to the size of the first vacuum insulation board 1. Apply the adhesive 5 to the bottom of the stud 6 and bond it to the base material. After the adhesive 5 is completely cured, immediately apply the adhesive 5 to the surface of the first vacuum insulation board 1 to be bonded and bond it to the base material. Install the buckle 7 and the stud cap 8 in sequence. After the adhesive 5 is completely cured, immediately apply the adhesive 5 to the surface of the second vacuum insulation board 2 to be bonded and bond it to the first vacuum insulation board 1. Bond the aerogel layer 3 and the protective layer 4 on the surface of the second vacuum insulation board 2 in sequence. Install the fixed buckle 7 and the stud cap 8 at the position of the pre-buried stud 6 in sequence. Finally, brush the flame retardant coating on the surface of the protective layer 4.

[0059] For the treatment of the bonding surface of the base material, after the surface of the base material to be bonded is cleaned and polished, the surface roughness is between Ra6.4 - 12.5 to adapt to the bonding of the adhesive 5.

[0060] In an embodiment of the present application, for the installation and fixation of the buckle 7 and the stud cap 8, after putting the buckle 7 on the stud 6, fix the first vacuum insulation board 1 and the base material by locking the buckle 7. Bend the exposed part of the stud 6, and then fasten the stud cap 8 to the buckle 7.

[0061] As an optional implementation manner, the tooling die includes a strip 9, the strip 9 is fixedly connected to the base material, a plurality of through holes are opened on the strip 9, and the plurality of through holes respectively correspond to a plurality of studs 6 on the base material one by one. A nut 10 is fixedly connected below the through hole, and a bolt 11 is threadedly connected in the nut 10, and the bolt 11 abuts against the stud 6.

[0062] In an embodiment of the present application, for the bonding of the stud 6, during the bonding and fixing of the stud 6, use the tooling die to press the stud 6 and the base material tightly, spot weld the strip 9 and the base material to ensure that the nut 10 and the stud 6 are in one-to-one correspondence. Screw the bolt 11 into the nut 10 and lock it to ensure that the bolt 11 presses the stud 6 tightly. After it is completely cured, remove the tooling die.

[0063] In an embodiment of the present application, the base material is a magnetic metal. During the bonding and fixing of the stud 6 and the base material, use a magnet to adsorb the bottom of the stud 6 on the surface of the base material for auxiliary fixation. And use a magnet instead of the tooling die, which saves the time of disassembly and installation, and the construction is more convenient and economical.

[0064] Embodiment 2:

[0065] Reference Figure 4 The difference between this embodiment and the first embodiment is that in this embodiment, the aerogel layer 3 is located between the first vacuum insulation panel 1 and the second vacuum insulation panel 2, the aerogel layer 3 adopts aerogel coating, and the thickness of the aerogel layer 3 is ≤2 mm.

[0066] When the present embodiment is used, after the first vacuum insulation panel 1 and the buckle 7 and the nail cap 8 are installed and fixed, the aerogel layer 3 is sprayed with a special spray gun, and after the aerogel layer 3 is completely cured, the second vacuum insulation panel 2 and the protective layer 4 are installed.

[0067] This embodiment uses aerogel coating to further reduce the thickness of the insulation structure, and arranges the second vacuum insulation panel 2 on the normal temperature side of the insulation structure, so that the surface of the insulation structure has higher mechanical strength, and also makes full use of the moisture-proof and corrosion-resistant characteristics of the vacuum insulation panel.

[0068] Embodiment three:

[0069] Reference Figure 5 The difference between this embodiment and the first embodiment is that in this embodiment, the base of the insulation core board 101 is made of powder core material, and the studs 6 embedded in the first vacuum insulation panel 1 are bonded to the surface of the barrier film bag 102 after the insulation core board 101 is placed in the barrier film bag 102 and evacuated, and then wrapped with the skin 103.

[0070] In this embodiment, the insulation core board 101 is directly evacuated after being loaded into the barrier film bag 102. The barrier film bag 102 is intact when evacuated, and there is no perforation due to the pre-embedded rivets 6 passing through the barrier film bag 102. The overall sealing of the first vacuum insulation panel 1 is better, and the insulation effect can be better guaranteed. In addition, the insulation core board 101 adopts powder core material, which has higher mechanical properties after pressing. The pre-embedded rivets 6 have a certain bearing capacity when bonded to the surface of the barrier film bag 102, and can play a role in fixing the second vacuum insulation panel 2.

[0071] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0072] The embodiments described above are only descriptions of the preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A marine wide-temperature-range high-strength and high heat-insulation fireproof and heat-preservation structure, characterized in that, Including: A first vacuum insulation layer, a second vacuum insulation layer, an aerogel layer (3) and a protective layer (4) are arranged in sequence from bottom to top. The first vacuum insulation layer is located at the top of the substrate, and adhesive layers are arranged at both the top and bottom of the first vacuum insulation layer; Mounting parts are arranged on the substrate and the first vacuum insulation layer. The first vacuum insulation layer is connected to the substrate in a limited way through the mounting parts, and the mounting parts on the first vacuum insulation layer sequentially penetrate through the second vacuum insulation layer, the aerogel layer (3) and the protective layer (4) and are connected in a limited way; The first vacuum insulation layer includes a plurality of first vacuum insulation boards (1), the second vacuum insulation layer includes a plurality of second vacuum insulation boards (2), and the plurality of first vacuum insulation boards (1) and the plurality of second vacuum insulation boards (2) are staggeredly overlapped through the mounting parts.

2. The high-strength, high heat insulation and fireproof thermal insulation structure for marine use with a wide temperature range according to claim 1, wherein: The first vacuum insulation board (1) includes a heat insulation core board (101), a barrier film bag (102) is coated on the outer wall of the heat insulation core board (101), a skin (103) is coated on the outer wall of the barrier film bag (102), and the mounting parts are arranged in the heat insulation core board (101).

3. The marine wide-temperature-range high-strength and high heat-insulation fireproof and heat-preservation structure according to claim 2, characterized in that: The mounting part includes a rivet (6). One end of the rivet (6) is fixedly connected to the substrate and inside the heat insulation core board (101), and a buckle (7) and a rivet cap (8) are installed at the other end of the rivet (6) through the first vacuum insulation board (1), the second vacuum insulation board (2) and the aerogel layer (3).

4. A marine wide-temperature-range high-strength and high heat-insulating fireproof and heat-preserving structure according to claim 1, characterized in that: The adhesive layer is an adhesive (5), and the adhesive (5) is arranged between the first vacuum insulation board (1) and the substrate and between the first vacuum insulation board (1) and the second vacuum insulation board (2).

5. The marine wide-temperature-range high-strength and high heat-insulation fireproof and heat-preservation structure according to claim 1, characterized in that: The thicknesses of the first vacuum insulation layer and the second vacuum insulation layer are both ≤ 15 mm, the density is ≤ 300 kg / m 3 , the thermal conductivity is ≤ 0.008 W / m·K, and the compressive strength is ≥ 50 kPa.

6. A marine wide-temperature-range high-strength and high heat-insulation fireproof and heat-preservation structure according to claim 1, characterized in that: The aerogel layer (3) is a silicon carbide nano-modified aerogel felt, the thickness of the aerogel felt is ≤ 10 mm, and the density of the aerogel felt decreases from 150 kg / m 3 on the substrate side to 80 kg / m 3 on the side of the protective layer (4), and the thermal conductivity is ≤ 0.025 W / m·K.

7. A marine wide-temperature-range high-strength and high heat-insulating fireproof and heat-preserving structure according to claim 1, characterized in that: The protective layer (4) is a flame-retardant white cloth or fiberglass cloth, and a flame-retardant coating modified by graphene is coated on the surface.

8. The marine wide-temperature-range high-strength, high heat-insulation and fireproof thermal insulation structure according to claim 4, characterized in that: The adhesive (5) is a nano-organosilicon modified adhesive, adding nano-scale silica functional fillers, and the viscosity range is 6000Pa·S - 8000Pa·S.

9. A construction method of a marine wide-temperature-range high-strength and high heat-insulation fireproof and heat-preservation structure, which is applicable to the marine wide-temperature-range high-strength and high heat-insulation fireproof and heat-preservation structure described in claim 1, is characterized in that, Including the following steps: Clean the surface of the substrate; Position the mounting parts and fix them on the surface of the substrate through a tooling die, and install the first vacuum insulation layer on the surface of the substrate and connect it to the mounting parts in a limited way; Install the second vacuum insulation layer, the aerogel layer (3) and the protective layer (4) on the first vacuum insulation layer in sequence, and connect them to the mounting parts on the first vacuum insulation layer in a limited way; Brush the flame-retardant coating on the protective layer (4).

10. The construction method of a marine wide-temperature-range high-strength and high heat-insulating fireproof and heat-preserving structure according to claim 9, characterized in that: The tooling die includes a strip (9), the strip (9) is fixedly connected to the substrate, a plurality of through holes are formed in the strip (9), and the plurality of through holes respectively correspond to a plurality of rivets (6) on the substrate. A nut (10) is fixedly connected below the through holes, and a bolt (11) is threadedly connected in the nut (10), and the bolt (11) abuts against the rivet (6).

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