Aerogel-improved honeycomb polyurethane heat insulation module

Abstract

The invention provides an aerogel improved honeycomb polyurethane heat insulation module. The aerogel improved honeycomb polyurethane heat insulation module comprises a polyurethane foam core, a heat insulation rod and an insulation box body. The heat insulation rod is arranged in the polyurethane foam core and comprises an outer shell defined by a film with a structure protection function, and aerogel is filled in the outer shell. The polyurethane foam core is of a honeycomb structure and comprises the peripheral edge of the polyurethane foam core and a plurality of wall faces extending in the longitudinal direction. A plurality of adjacently arranged honeycomb holes are formed in the plurality of wall surfaces along a plane array extending transversely; the polyurethane foam core surrounds the side face of the heat insulation rod. The insulation box body surrounds the outer surface of the polyurethane foam core, and the polyurethane foam core top face insulation box body and the polyurethane foam core bottom face insulation box body completely cover the polyurethane foam core and the polyurethane foam core side face periphery insulation box body. According to the technical scheme, the heat leakage loss of liquefied natural gas in the storage and transportation process can be reduced according to the higher heat insulation requirement of a heat insulation module in an existing LNG containment system and the material physical property based on polyurethane and silicon dioxide aerogel.

Description

Technical Field

[0001] The invention belongs to the technical field of LNG ship construction, and in particular relates to an aerogel-modified honeycomb polyurethane insulation module. Background Art

[0002] The insulation module in the LNG containment system is one of the important components in the LNG storage and transportation process. It needs to have good insulation performance to reduce the evaporation rate of liquefied natural gas. Polyurethane is usually used as the insulation material. Polyurethane has good insulation performance. The thermal conductivity of polyurethane foam board is between 0.024W / (m·K) and 0.032W / (m·K). It is also light, non-corrosive and has good mechanical properties.

[0003] Since the LNG containment system requires higher thermal insulation performance, it is urgent to improve the polyurethane foam board to reduce its thermal conductivity as much as possible, thereby reducing the evaporation rate of liquefied natural gas, while reducing the weight of the LNG ship to meet the low-temperature thermal insulation performance requirements of the LNG ship for the containment system. Silica aerogel is a structure-controllable nanoporous lightweight material with excellent properties such as low density, low thermal conductivity, and high flame retardancy. The thermal conductivity can be as low as 0.013W / (m·K) at room temperature and pressure, which is one of the materials with the lowest thermal conductivity in the insulation field. However, due to its poor mechanical properties, its development and application areas are greatly limited.

[0004] Therefore, how to provide an aerogel-modified honeycomb polyurethane insulation module that can meet the higher insulation requirements of the insulation module in the current LNG containment system and the material properties based on polyurethane and silica aerogel, and reduce the heat leakage loss of liquefied natural gas during storage and transportation has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The embodiment of the present invention provides an aerogel-modified honeycomb polyurethane insulation module, which can reduce the heat leakage loss of liquefied natural gas during storage and transportation according to the higher insulation requirements of the insulation module in the current LNG containment system and the material properties based on polyurethane and silica aerogel.

[0006] In an embodiment of the present invention, an aerogel-modified honeycomb polyurethane insulation module is provided, comprising: a polyurethane foam core, an insulation rod and an insulation box.

[0007] The insulation rod is arranged inside the polyurethane foam core, and comprises an outer shell surrounded by a film having a structural protection function, and the outer shell is filled with aerogel;

[0008] The polyurethane foam core is a honeycomb structure, including edges around the polyurethane foam core and a plurality of walls extending along the longitudinal direction; the plurality of walls are a plurality of adjacently arranged honeycomb holes arranged in a plane array extending in the transverse direction;

[0009] The polyurethane foam core surrounds the side of the insulation rod; the insulating box surrounds the outer surface of the polyurethane foam core, and the insulating box on the top and bottom of the polyurethane foam core completely covers the polyurethane foam core and the insulating box around the side of the polyurethane foam core.

[0010] Furthermore, the shape of the thermal insulation rod is a cylinder or a frustum consisting of at least a hexagonal body, a cylinder or a frustum, and a cylinder or a frustum with a generatrix of the hexagonal body, the cylinder or the frustum as a curve.

[0011] Furthermore, the polyurethane foam core and the aerogel are both made of materials that meet the set thermal conductivity requirements, wherein the range of the polyurethane foam core that meets the set thermal conductivity requirements is 0.024W / (m·K) to 0.032W / (m·K); the range of the aerogel that meets the set thermal conductivity requirements is 0.013W / (m·K) to 0.024W / (m·K).

[0012] Furthermore, the porosity of the polyurethane foam core is 33% to 70%.

[0013]

[0014] Among them, δ aerogel =δ PU =δ is the thickness of the honeycomb polyurethane insulation module, S is the panel area of ​​the polyurethane foam core, S=a×b, a and b are the length and width of the polyurethane foam core in the transverse extension plane respectively; A aerogel is the area of ​​all insulation rods on the transverse extension plane 20, D is the inner diameter of the hexagonal insulation rod, and n is the number of insulation rods in the polyurethane foam core.

[0015] Furthermore, the total thermal resistance of the honeycomb polyurethane insulation module is:

[0016]

[0017] In the formula, R total is the total thermal resistance of the honeycomb polyurethane insulation module; R PU is the thermal resistance of the urethane foam core; R aerogel is the thermal resistance of the insulation rod; R ply Insulated box with urethane foam core top and bottom; R ply，around Insulated box with polyurethane foam core all around the sides.

[0018] Furthermore, the material of the insulating box is plywood, the thermal conductivity of which is 0.24W / (m·K), the thickness d2 ranges from 6mm to 12mm, and the heat transfer resistance thereof is ignored:

[0019]

[0020] In the formula, R PU is the thermal resistance of the polyurethane foam core; δ PU is the thickness of the polyurethane foam core; R aerogel is the thermal resistance of the insulation rod; δ aerogel is the thickness of the insulation rod; γ is the porosity of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; λ aerogel is the thermal conductivity of the insulating rod, λ PU is the thermal conductivity of the polyurethane foam core.

[0021] Furthermore, the thermal conductivity of the aerogel-modified honeycomb polyurethane insulation module is

[0022]

[0023] Where, δ is the thickness of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; R total is the total thermal resistance of the honeycomb polyurethane insulation module;

[0024] The heat flux density of the aerogel-modified honeycomb polyurethane insulation module is

[0025]

[0026] Where, Φ is the heat flow of the honeycomb polyurethane insulation module; ΔT is the temperature difference between the cold end and the hot end of the honeycomb polyurethane insulation module; R total is the total thermal resistance of the honeycomb polyurethane insulation module.

[0027] The density of the aerogel-modified cellular polyurethane insulation module is

[0028] ρ=ρ aerogel γ+ρ PU (1-γ)

[0029] Where, ρ is the density of the honeycomb polyurethane insulation module; ρ aerogel and ρ PU are the densities of aerogel and polyurethane foam core, respectively.

[0030] Furthermore, the polyurethane foam core is made of a low-temperature resistant material with a set strength, wherein the low-temperature resistant material can withstand a temperature of at least -163°C; the strength must meet the following requirements: the shear strength in the longitudinal and transverse directions must be ≥0.8Mpa at -100°C and at room temperature; the tensile strength in the longitudinal direction must be ≥1.2Mpa, and the tensile strength in the transverse direction must be ≥2.7Mpa; the compressive strength in the longitudinal direction must be ≥1.2Mpa.

[0031] Furthermore, the outer shell of the insulation rod is an aluminum foil composite film selected from glass fiber cloth / aluminum foil material. The aluminum foil composite film is a sandwich structure with three layers in total, and the total thickness is not more than 0.6 mm. The upper and lower layers are glass fiber cloth, and the middle is aluminum foil; the aerogel in the outer shell is selected from silica aerogel material.

[0032] Furthermore, the silica aerogel material is fiber or porous ceramic, the fiber includes glass fiber, silica fiber and alumina fiber, etc.; the porous ceramic includes silica, zirconium oxide and yttria-doped zirconium oxide porous ceramic; the aerogel is filled in the outer shell, and the outer shell is vacuum-sealed to improve the thermal insulation effect; the outer shell surface of the insulation rod and the wall of the honeycomb hole are coated with glue, and the glue is epoxy resin.

[0033] Furthermore, the material of the box body is plywood with a thickness ranging from 6mm to 12mm, the thickness of the edges of the polyurethane foam core is d1, and the value of d1 is 3mm to 30mm. The transverse extension plane is perpendicular to the longitudinal direction. The multiple walls of the honeycomb holes are connected to each other to form a closed surface. The angle between every two walls is α, and the value of α is 37° to 143°. The longitudinal direction is the heat conduction direction of the insulation module.

[0034] Furthermore, the thickness and spacing of the multiple walls of the honeycomb holes in the longitudinal direction are δ and T respectively, δ is 100mm~450mm, T is 3mm~30mm, the thickness of the polyurethane foam core, the thickness of the insulation rod and the thickness of the honeycomb holes are equal; the length and width of the polyurethane foam core in the transverse extension plane are a and b respectively, a and b are 500mm~4000mm, the inner diameter of the insulation rod in the transverse extension plane is D, and D is 45mm~105mm.

[0035] The beneficial effects brought by the present invention are as follows:

[0036] It can be seen from the above scheme that the embodiment of the present invention provides an aerogel-modified honeycomb polyurethane insulation module, including: a polyurethane foam core, an insulation rod and an insulation box. The insulation rod is arranged inside the polyurethane foam core, including an outer shell surrounded by a thin film with a structural protection function, and the outer shell is filled with aerogel; the polyurethane foam core is a honeycomb structure, including edges around the polyurethane foam core and multiple walls extending in the longitudinal direction; multiple walls are arranged along a multiple adjacent honeycomb holes arranged in a planar array extending in the transverse direction; the polyurethane foam core surrounds the side of the insulation rod; the insulation box surrounds the outer surface of the polyurethane foam core, and the insulation box on the top and bottom of the polyurethane foam core completely covers the polyurethane foam core and the insulation box around the side of the polyurethane foam core. The technical solution of the present invention can reduce the heat leakage loss of liquefied natural gas during storage and transportation in response to the higher insulation requirements of the insulation module in the current LNG containment system and the material properties based on polyurethane and silica aerogel. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram showing an aerogel-modified honeycomb polyurethane insulation module in an enclosure system according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the internal structure of the aerogel-modified honeycomb polyurethane thermal insulation module according to an embodiment of the present invention;

[0039] Figure 3 A top view of the thermal insulation module according to an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of a steady-state heat transfer model of an insulation module according to an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the series-parallel thermal resistance of the insulation module according to an embodiment of the present invention;

[0042] Figure 6 A graph showing the relationship between the thermal conductivity, density and porosity ratio of the thermal insulation module according to an embodiment of the present invention;

[0043] In the figure, 1 is a honeycomb polyurethane insulation module, 2 is a polyurethane foam core, 2a is the edges around the polyurethane foam core, 3 is an insulation rod, 4 is an insulating box, 5 is the surface of the outer shell, 6 is a wall surface, 7 is a honeycomb hole, 20 is a transverse extension plane, 21 is a longitudinal direction, and 22 is a transverse direction. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the embodiment of the present invention, an aerogel-modified honeycomb polyurethane insulation module is provided. Aiming at the higher insulation requirements of the insulation module in the current LNG containment system and the material properties based on polyurethane and silica aerogel, the present invention provides an aerogel-modified honeycomb polyurethane insulation module. The purpose is to reduce the heat leakage loss of liquefied natural gas during storage and transportation under the large temperature difference between -163℃ and the external environment 20℃ through the insulation module.

[0046] like Figures 1 to 6 As shown, Figure 1 A schematic diagram of an aerogel-modified honeycomb polyurethane insulation module in an enclosure system according to an embodiment of the present invention is shown. Figure 2 This is a schematic diagram of the internal structure of the aerogel-modified honeycomb polyurethane insulation module according to an embodiment of the present invention. Figure 3 This is a top view of the insulation module according to an embodiment of the present invention. Figure 4 This is a schematic diagram of a steady-state heat transfer model of an insulation module according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the series-parallel thermal resistance of the insulation module according to an embodiment of the present invention, Figure 6 This is a relationship diagram between the thermal conductivity, density and porosity ratio of the insulation module described in an embodiment of the present invention.

[0047] In the figure, an aerogel-modified honeycomb polyurethane insulation module 1 includes a polyurethane foam core 2, an insulation rod 3 and an insulation box 4, wherein the insulation rod 3 is arranged inside the polyurethane foam core 2, and the polyurethane foam core 2 surrounds the side of the insulation rod 3, and the number of the insulation rods 3 in the polyurethane foam core 2 is n; the insulation rod 3 includes an outer shell surrounded by a protective film with a heat-conducting effect, and the outer shell is filled with aerogel; the insulation box 4 surrounds the outer surface of the foam core 2.

[0048] The polyurethane foam core 2 is a honeycomb structure, including edges around the polyurethane foam core and a plurality of walls extending along the longitudinal direction; the plurality of walls are a plurality of adjacently arranged honeycomb holes arranged in a plane array extending in the transverse direction;

[0049] The polyurethane foam core 2 surrounds the side of the insulation rod 3; the insulating box 4 surrounds the outer surface of the polyurethane foam core 2, and the insulating box 4 on the top and bottom of the polyurethane foam core 1 completely covers the polyurethane foam core 1 and the insulating box 4 around the side of the polyurethane foam core.

[0050] In the embodiment of the present invention, a honeycomb polyurethane insulation module modified by aerogel is provided in view of the composition, material, geometry and size characteristics of the insulation module of the LNG containment system. Compared with the polyurethane insulation module of the same size, the overall thermal conductivity of the insulation module is reduced, thereby reducing the evaporation rate of liquefied natural gas, while reducing the weight of the LNG ship, and meeting the low-temperature insulation performance requirements of the containment system of the LNG ship. The technical scheme of the present invention utilizes the low thermal conductivity and low-density material properties of aerogel, and prepares a composite material with both insulation and mechanical properties by doping with materials with high tensile strength and high compressive strength. The composite aerogel is prepared into a honeycomb shape, and after a layer of aluminum foil composite film with structural protection is wrapped on the outer surface, it is made into an insulation rod and filled into a polyurethane foam core.

[0051] Among them, the honeycomb hexagonal ribs serve as supports between the insulation rods, utilizing the high strength of the honeycomb structure, significantly improving the mechanical properties of the insulation module of the present invention, which is a technical advantage over other insulation modules. The thermal conductivity coefficient of the insulation module of the present invention is obtained using a special formula, which significantly improves the insulation performance of the existing LNG containment system, while reducing the weight of the LNG containment system and improving the competitiveness of domestic LNG ship types in the international market.

[0052] In one embodiment of the present invention, the shape of the thermal insulation rod 3 is a cylinder or a frustum comprising at least a hexagonal body, a cylinder or a frustum, and a cylinder or a frustum with the generatrix of the hexagonal body, the cylinder or the frustum as a curve.

[0053] In another embodiment of the present invention, the polyurethane foam core 2 and the aerogel are both made of materials that meet the set thermal conductivity requirements, wherein the range of the polyurethane foam core that meets the set thermal conductivity requirements is 0.024W / (m·K) to 0.032W / (m·K); the range of the aerogel that meets the set thermal conductivity requirements is 0.013W / (m·K) to 0.024W / (m·K).

[0054] In another embodiment of the present invention, the porosity of the polyurethane foam core is 33% to 70%.

[0055]

[0056] Among them, δ aerogel =δ PU =δ is the thickness of the honeycomb polyurethane insulation module, S is the panel area of ​​the polyurethane foam core, S=a×b, a and b are the length and width of the polyurethane foam core in the transverse extension plane respectively; A aerogel is the area of ​​all insulation rods on the transverse extension plane 20, D is the inner diameter of the hexagonal insulation rod, and n is the number of insulation rods in the polyurethane foam core.

[0057] In another embodiment of the present invention, the total thermal resistance of the honeycomb polyurethane insulation module is:

[0058]

[0059] In the formula, R total is the total thermal resistance of the honeycomb polyurethane insulation module; R PU is the thermal resistance of the urethane foam core; R aerogel is the thermal resistance of the insulation rod; R ply Insulated box with urethane foam core top and bottom; R ply，around Insulated box with polyurethane foam core all around the sides.

[0060] In another embodiment of the present invention, the material of the insulating box is plywood, the thermal conductivity of which is 0.24W / (m·K), the thickness d2 ranges from 6mm to 12mm, and the heat transfer resistance thereof is ignored:

[0061]

[0062] In the formula, R PU is the thermal resistance of the polyurethane foam core; δ PU is the thickness of the polyurethane foam core; R aerogel is the thermal resistance of the insulation rod; δ aerogel is the thickness of the insulation rod; γ is the porosity of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; λ aerogel is the thermal conductivity of the insulating rod, λ PU is the thermal conductivity of the polyurethane foam core.

[0063] In another embodiment of the present invention, the thermal conductivity of the aerogel-modified honeycomb polyurethane insulation module is

[0064]

[0065] Where, δ is the thickness of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; R total is the total thermal resistance of the honeycomb polyurethane insulation module;

[0066] The heat flux density of the aerogel-modified honeycomb polyurethane insulation module is

[0067]

[0068] Where, Φ is the heat flow of the honeycomb polyurethane insulation module; ΔT is the temperature difference between the cold end and the hot end of the honeycomb polyurethane insulation module; R totalis the total thermal resistance of the honeycomb polyurethane insulation module.

[0069] The density of the aerogel-modified cellular polyurethane insulation module is

[0070] ρ=ρ aerogel γ+ρ PU (1-γ)

[0071] Where, ρ is the density of the honeycomb polyurethane insulation module; ρ aerogel and ρ PU are the densities of aerogel and polyurethane foam core, respectively.

[0072] In another embodiment of the present invention, the polyurethane foam core is made of a low-temperature resistant material with a set strength, wherein the low-temperature resistant material can withstand a temperature of at least -163°C; the strength must meet the following requirements: the shear strength in the longitudinal and transverse directions must be ≥0.8Mpa at -100°C and at room temperature; the tensile strength in the longitudinal direction must be ≥1.2Mpa, and the tensile strength in the transverse direction must be ≥2.7Mpa; the compressive strength in the longitudinal direction must be ≥1.2Mpa.

[0073] In another embodiment of the present invention, the outer shell of the insulation rod is an aluminum foil composite film selected from glass fiber cloth / aluminum foil material, the aluminum foil composite film is a sandwich structure with three layers in total, and the total thickness is not more than 0.6 mm, the upper and lower layers are glass fiber cloth, and the middle is aluminum foil; the aerogel in the outer shell is selected from silica aerogel material.

[0074] In another embodiment of the present invention, the silica aerogel material is fiber or porous ceramic, and the fiber includes glass fiber, silica fiber and alumina fiber, etc.; the porous ceramic includes silica, zirconium oxide and yttria-doped zirconium oxide porous ceramic; the aerogel is filled in the outer shell, and the outer shell is vacuum-sealed to improve the thermal insulation effect; the outer shell surface of the insulation rod and the wall of the honeycomb hole are coated with glue, and the glue is epoxy resin.

[0075] In another embodiment of the present invention, the material of the box body is plywood with a thickness ranging from 6 mm to 12 mm, the thickness of the edges of the polyurethane foam core is d1, and the value of d1 is 3 mm to 30 mm. The transverse extension plane is perpendicular to the longitudinal direction, and the multiple walls of the honeycomb holes are connected to each other to form a closed surface. The angle between every two walls is α, and the value of α is 37° to 143°. The longitudinal direction is the heat conduction direction of the insulation module.

[0076] In another embodiment of the present invention, the thickness and spacing of the multiple walls of the honeycomb holes in the longitudinal direction are δ and T respectively, δ is 100mm~450mm, T is 3mm~30mm, the thickness of the polyurethane foam core, the thickness of the insulation rod and the thickness of the honeycomb holes are equal; the length and width of the polyurethane foam core in the transverse extension plane are a and b respectively, a and b are 500mm~4000mm, the inner diameter of the insulation rod in the transverse extension plane is D, and D is 45mm~105mm.

[0077] In another embodiment of the present invention, the polyurethane foam core 2 is a honeycomb structure, including edges 2a around the polyurethane foam core and a plurality of walls 6 extending along the longitudinal direction 21. The plurality of walls 6 are arranged in an array along a transversely extending plane 20 to form a plurality of adjacently arranged honeycomb holes 7. The thickness of the edges 2a around the polyurethane foam core is d1. The transversely extending plane 20 is perpendicular to the longitudinal direction 21. The plurality of walls 6 of the honeycomb holes 7 are connected to each other to form a closed surface, and the angle between each two walls 6 is α. The longitudinal direction 21 is the heat conduction direction of the polyurethane insulation module 1.

[0078] The thickness and interval of the plurality of walls 6 of the honeycomb cells 7 in the longitudinal direction 21 are respectively δ and T. The thickness of the polyurethane foam core 2, the thickness of the insulation rod 3 and the thickness of the honeycomb cells 7 are equal.

[0079] The length and width of the polyurethane foam core 2 in the transverse extension plane 20 are respectively a and b. The inner diameter of the thermal insulation rod in the transverse extension plane 20 is D.

[0080] The shape of the thermal insulation rod 3 is a hexagonal prism, a cylindrical shape, a truncated cone shape or a prism shape whose generatrix is ​​an arbitrary curve.

[0081] The outer shell of the insulating rod 3 is an aluminum foil composite film, selected from glass fiber cloth / aluminum foil material, with a sandwich structure of three layers in total, with a total thickness of no more than 0.6 mm, the upper and lower layers are glass fiber cloth, and the middle is aluminum foil; the aerogel in the outer shell is selected from silica aerogel material, preferably a silica aerogel composite material with improved mechanical properties after being doped with low-density, high tensile strength and high compressive strength materials. The low-density, high tensile strength and high compressive strength materials are fibers or porous ceramics, and the fibers include glass fibers, silicon oxide fibers and aluminum oxide fibers, etc.; the porous ceramics include silicon oxide, zirconium oxide and zirconium oxide porous ceramics doped with yttrium oxide. The aerogel is filled in the outer shell, and the outer shell is vacuum-sealed to improve the thermal insulation effect. The outer shell surface 5 of the insulating rod 3 and the wall surface 6 of the honeycomb hole are coated with glue, and the glue is epoxy resin.

[0082] The insulating box 4 surrounds the outer surface of the polyurethane foam core 2. The insulating box 4 on the top and bottom of the polyurethane foam core 2 completely covers the polyurethane foam core 2 and the insulating box 4 around the sides of the polyurethane foam core 2. It should be noted that in order to facilitate the display of the honeycomb structure, Figure 1 The insulating box 4 located on the top surface of the polyurethane foam core 2 is not shown. The insulating box 4 can improve the structural integrity of the honeycomb polyurethane insulation module 1, reduce the structural damage to the polyurethane foam core 2 and the insulation rod 3 during transportation and installation, and enhance the ability to absorb energy during collision during use. The material of the box 4 is plywood, and the thickness d2 ranges from 6mm to 12mm.

[0083] The polyurethane foam core is made of a low-temperature resistant material with a set strength, wherein the low-temperature resistant material can withstand a temperature of at least -163°C; the strength must meet the following requirements, specifically, the shear strength in the longitudinal direction 21 and the transverse direction 22 must be ≥0.8Mpa at -100°C and at room temperature; the tensile strength in the longitudinal direction 21 must be ≥1.2Mpa, and the tensile strength in the transverse direction 22 must be ≥2.7Mpa; the compressive strength in the longitudinal direction 21 must be ≥1.2Mpa.

[0084] In one embodiment of the present invention, an aerogel-modified honeycomb polyurethane insulation module comprises a polyurethane foam core 2, an insulation rod 3 and an insulation box 4, wherein the insulation rod 3 is arranged inside the polyurethane foam core 2, and the polyurethane foam core 2 surrounds the side of the insulation rod 3. The length and width of the polyurethane foam core 2 on the transverse extension plane 20 are a and b respectively, the thickness and spacing of the insulation rod are δ and T respectively, the inner diameter of the insulation rod is D, and the number of insulation rods in the polyurethane foam core is n. The porosity of the honeycomb polyurethane insulation module is γ;

[0085] The insulation rod 3 is in the shape of a regular hexagonal prism;

[0086] The outer shell material of the insulation rod is selected from aluminum foil composite film, the material is glass fiber cloth and aluminum foil, the sandwich structure has three layers in total, the thickness is 0.6mm, the upper and lower layers are glass fiber cloth, and the middle is aluminum foil. The aerogel material in the outer shell is selected from silica aerogel doped with glass fiber;

[0087] The γ=33%;T=6.0mm;D=10.00mm;n=70;a=150mm;b=123mm;δ=30mm;λ PU =0.032W / (m·K);λ aerogel =0.013W / (m·K); ρ aerogel =3kg / m 3 ρ PU =120kg / m 3.

[0088] The thermal conductivity of the honeycomb polyurethane insulation module is 0.026W / (m·K). Compared with the polyurethane foam insulation module, the thermal conductivity of the honeycomb polyurethane insulation module after aerogel modification is reduced by 19.59%. The density of the honeycomb polyurethane insulation module is 81.4kg / m 3 Compared with the polyurethane foam insulation module, the density of the honeycomb polyurethane insulation module after aerogel modification is reduced by 32.18%. When the cold end and hot end temperatures are -163°C and 20°C respectively, the heat flux density of the honeycomb polyurethane insulation module is 161W / m 2 .

[0089] In another embodiment of the present invention, an aerogel-modified honeycomb polyurethane insulation module comprises a polyurethane foam core 2, an insulation rod 3 and an insulation box 4, wherein the insulation rod 3 is arranged inside the polyurethane foam core 2, and the polyurethane foam core 2 surrounds the side of the insulation rod 3. The length and width of the polyurethane foam core 2 on the transverse extension plane 20 are a and b respectively, the thickness and spacing of the insulation rod are δ and T respectively, the inner diameter of the insulation rod is D, and the number of insulation rods in the polyurethane foam core is n. The porosity of the honeycomb polyurethane insulation module is γ;

[0090] The insulation rod 3 is in the shape of a regular hexagonal prism;

[0091] The outer shell material of the insulation rod is selected from aluminum foil composite film, the material is glass fiber cloth and aluminum foil, the sandwich structure has three layers in total, the thickness is 0.6mm, the upper and lower layers are glass fiber cloth, and the middle is aluminum foil. The aerogel material in the outer shell is selected from silica aerogel;

[0092] The γ=55%;T=5.0mm;D=12.94mm;n=70;a=150mm;b=123mm;δ=30mm;λ PU =0.032W / (m·K);λ aerogel =0.013W / (m·K); ρ aerogel =3kg / m 3 ρ PU =120kg / m 3 .

[0093] The thermal conductivity of the honeycomb polyurethane insulation module is 0.026W / (m·K). Compared with the polyurethane foam insulation module, the thermal conductivity of the honeycomb polyurethane insulation module after aerogel modification is reduced by 32.66%. The density of the honeycomb polyurethane insulation module is 55.7kg / m 3Compared with the polyurethane foam insulation module, the density of the honeycomb polyurethane insulation module after aerogel modification is reduced by 53.62%. When the cold end and hot end temperatures are -163°C and 20°C respectively, the heat flux density of the honeycomb polyurethane insulation module is 135W / m 2 .

[0094] In another embodiment of the present invention, an aerogel-modified honeycomb polyurethane insulation module comprises a polyurethane foam core 2, an insulation rod 3 and an insulation box 4, wherein the insulation rod 3 is arranged inside the polyurethane foam core 2, and the polyurethane foam core 2 surrounds the side of the insulation rod 3. The length and width of the polyurethane foam core 2 on the transverse extension plane 20 are a and b respectively, the thickness and spacing of the insulation rod are δ and T respectively, the inner diameter of the insulation rod is D, and the number of insulation rods in the polyurethane foam core is n. The porosity of the honeycomb polyurethane insulation module is γ;

[0095] The insulation rod 3 is in the shape of a regular hexagonal prism;

[0096] The outer shell material of the insulation rod is selected from aluminum foil composite film, the material is glass fiber cloth and aluminum foil, the sandwich structure has three layers in total, the thickness is 0.6mm, the upper and lower layers are glass fiber cloth, and the middle is aluminum foil. The aerogel material in the outer shell is selected from silica aerogel;

[0097] The γ=60%;T=4.0mm;D=13.51mm;n=70;a=150mm;b=123mm;δ=30mm;λ PU =0.032W / (m·K);λ aerogel =0.013W / (m·K); ρ aerogel =3kg / m 3 ρ PU =120kg / m 3 .

[0098] The thermal conductivity of the honeycomb polyurethane insulation module is 0.026W / (m·K). Compared with the polyurethane foam insulation module, the thermal conductivity of the honeycomb polyurethane insulation module after aerogel modification is reduced by 35.63%. The density of the honeycomb polyurethane insulation module is 49.8kg / m 3 Compared with the polyurethane foam insulation module, the density of the honeycomb polyurethane insulation module after aerogel modification is reduced by 58.50%. When the cold end and hot end temperatures are -163°C and 20°C respectively, the heat flux density of the honeycomb polyurethane insulation module is 129W / m 2 .

[0099] In another embodiment of the present invention, an aerogel-modified honeycomb polyurethane insulation module comprises a polyurethane foam core 2, an insulation rod 3 and an insulation box 4, wherein the insulation rod 3 is arranged inside the polyurethane foam core 2, and the polyurethane foam core 2 surrounds the side of the insulation rod 3. The length and width of the polyurethane foam core 2 on the transverse extension plane 20 are a and b respectively, the thickness and spacing of the insulation rod are δ and T respectively, the inner diameter of the insulation rod is D, and the number of insulation rods in the polyurethane foam core is n. The porosity of the honeycomb polyurethane insulation module is γ;

[0100] The insulation rod 3 is in the shape of a regular hexagonal prism;

[0101] The outer shell material of the insulation rod is selected from aluminum foil composite film, the material is glass fiber cloth and aluminum foil, the sandwich structure has three layers in total, the thickness is 0.6mm, the upper and lower layers are glass fiber cloth, and the middle is aluminum foil. The aerogel material in the outer shell is selected from silica aerogel;

[0102] The γ=65%;T=3.0mm;D=14.07mm;n=70;a=150mm;b=123mm;δ=30mm;λ PU =0.032W / (m·K);λ aerogel =0.013W / (m·K); ρ aerogel =3kg / m 3 ρ PU =120kg / m 3 .

[0103] The thermal conductivity of the honeycomb polyurethane insulation module is 0.019W / (m·K). Compared with the polyurethane foam insulation module, the thermal conductivity of the honeycomb polyurethane insulation module after aerogel modification is reduced by 38.59%. The density of the honeycomb polyurethane insulation module is 43.95kg / m 3 Compared with the polyurethane foam insulation module, the density of the honeycomb polyurethane insulation module after aerogel modification is reduced by 63.38%. When the cold end and hot end temperatures are -163°C and 20°C respectively, the heat flux density of the honeycomb polyurethane insulation module is 123W / m 2

[0104] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An aerogel-modified honeycomb polyurethane insulation module, characterized in that: The honeycomb polyurethane insulation module comprises: a polyurethane foam core, an insulation rod and an insulation box; The insulation rod is arranged inside the polyurethane foam core, and comprises an outer shell surrounded by a film having a structural protection function, and the outer shell is filled with aerogel; The polyurethane foam core is a honeycomb structure, including edges around the polyurethane foam core and a plurality of walls extending along the longitudinal direction; the plurality of walls are a plurality of adjacently arranged honeycomb holes arranged in a plane array extending in the transverse direction; The polyurethane foam core surrounds the side of the insulation rod; the insulating box surrounds the outer surface of the polyurethane foam core, and the insulating box on the top and bottom of the polyurethane foam core completely covers the polyurethane foam core and the insulating box around the side of the polyurethane foam core.

2. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that: The shape of the thermal insulation rod is a cylinder or a table body which at least includes a hexagonal body, a cylinder or a truncated cone body, and the generatrix of the hexagonal body, the cylinder or the truncated cone body is a curve.

3. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that: The polyurethane foam core and the aerogel are both made of materials that meet the set thermal conductivity requirements, wherein the range of the polyurethane foam core that meets the set thermal conductivity requirements is 0.024W / (m·K) to 0.032W / (m·K); the range of the aerogel that meets the set thermal conductivity requirements is 0.013W / (m·K) to 0.024W / (m·K).

4. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that: The porosity of the polyurethane foam core is 33% to 70%. Among them, δ aerogel =δ PU =δ is the thickness of the honeycomb polyurethane insulation module, S is the panel area of ​​the polyurethane foam core, S=a×b, a and b are the length and width of the polyurethane foam core in the transverse extension plane respectively; A aerogel is the area of ​​all insulation rods on the transverse extension plane 20, D is the inner diameter of the hexagonal insulation rod, and n is the number of insulation rods in the polyurethane foam core.

5. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that: The total thermal resistance of the honeycomb polyurethane insulation module is: In the formula, R total is the total thermal resistance of the honeycomb polyurethane insulation module; R PU is the thermal resistance of the urethane foam core; R aerogel is the thermal resistance of the insulation rod; R ply Insulated box with urethane foam core top and bottom; R ply，around Insulated box with polyurethane foam core all around the sides.

6. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that: The material of the insulating box is plywood, the thermal conductivity of which is 0.24W / (m·K), the thickness d2 ranges from 6mm to 12mm, and its heat transfer resistance is ignored: In the formula, R PU is the thermal resistance of the polyurethane foam core; δ PU is the thickness of the polyurethane foam core; R aerogel is the thermal resistance of the insulation rod; δ aerogel is the thickness of the insulation rod; γ is the porosity of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; λ aerogel is the thermal conductivity of the insulating rod, λ PU is the thermal conductivity of the polyurethane foam core.

7. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that: The thermal conductivity of the aerogel-modified honeycomb polyurethane insulation module is Where, δ is the thickness of the honeycomb polyurethane insulation module; S is the panel area of ​​the polyurethane foam core; R total is the total thermal resistance of the honeycomb polyurethane insulation module; The heat flux density of the aerogel-modified honeycomb polyurethane insulation module is Where, Φ is the heat flow of the honeycomb polyurethane insulation module; ΔT is the temperature difference between the cold end and the hot end of the honeycomb polyurethane insulation module; R total is the total thermal resistance of the honeycomb polyurethane insulation module. The density of the aerogel-modified cellular polyurethane insulation module is p=p aerogel c+r PU (1-c) Where, ρ is the density of the honeycomb polyurethane insulation module; ρ aerogel and ρ PU are the densities of aerogel and polyurethane foam core, respectively.

8. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that: The polyurethane foam core is made of a low-temperature resistant material with a set strength, wherein the low-temperature resistant material can withstand a temperature of at least -163°C; the strength must meet the following requirements: the shear strength in the longitudinal and transverse directions must be ≥0.8Mpa at -100°C and at room temperature; the tensile strength in the longitudinal direction must be ≥1.2Mpa, and the tensile strength in the transverse direction must be ≥2.7Mpa; the compressive strength in the longitudinal direction must be ≥1.2Mpa.

9. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that: The outer shell of the insulation rod is an aluminum foil composite film selected from glass fiber cloth / aluminum foil material. The aluminum foil composite film is a sandwich structure with three layers in total, with a total thickness of no more than 0.6 mm. The upper and lower layers are glass fiber cloth, and the middle is aluminum foil; the aerogel in the outer shell is selected from silica aerogel material.

10. The aerogel-modified honeycomb polyurethane insulation module according to claim 9, characterized in that: The silica aerogel material is fiber or porous ceramic, and the fiber includes glass fiber, silica fiber and alumina fiber, etc.; the porous ceramic includes silica, zirconium oxide and yttria-doped zirconium oxide porous ceramic; the aerogel is filled in the outer shell, and the outer shell is vacuum-sealed to improve the thermal insulation effect; the outer shell surface of the insulation rod and the wall surface of the honeycomb hole are coated with glue, and the glue is epoxy resin.

11. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that: The material of the box body is plywood with a thickness range of 6mm to 12mm. The thickness of the edges of the polyurethane foam core is d1, and the value of d1 is 3mm to 30mm. The transverse extension plane is perpendicular to the longitudinal direction. The multiple walls of the honeycomb holes are connected to each other to form a closed surface. The angle between every two walls is α, and the value of α is 37° to 143°. The longitudinal direction is the heat conduction direction of the insulation module.

12. The aerogel-modified honeycomb polyurethane insulation module according to claim 1, characterized in that: The thickness and spacing of the multiple walls of the honeycomb holes in the longitudinal direction are δ and T respectively, δ is 100 mm to 450 mm, T is 3 mm to 30 mm, and the thickness of the polyurethane foam core, the thickness of the insulation rod and the thickness of the honeycomb holes are equal; The length and width of the polyurethane foam core on the transverse extension plane are a and b respectively, and the values ​​of a and b are 500mm to 4000mm. The inner diameter of the insulation rod on the transverse extension plane is D, and the value of D is 45mm to 105mm.

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