Multilayer independent vacuum cavity structure heat insulation board, preparation method thereof and external wall heat preservation structure

Abstract

The present application relates to a multilayer independent vacuum cavity structure heat insulation board, a preparation method thereof and an outer wall heat preservation structure, the multilayer independent vacuum cavity structure heat insulation board comprises a multilayer cavity structure main plate, a hot melt sealing plate and an ultrasonic sealing plate, the hot melt sealing plate and the ultrasonic sealing plate are respectively fixed at two ends of the multilayer cavity structure main plate in the length direction, and form a closed vacuum structure cavity together with the multilayer cavity structure main plate; the closed vacuum structure cavity is separated by a plurality of cross-shaped spacing plates to form a plurality of independent vacuum layers arranged along the thickness direction of the closed vacuum structure cavity, each vacuum layer has a plurality of independent vacuum cavities arranged along the height direction, and the independent vacuum cavities are arranged along the length direction of the multilayer cavity structure main plate. The multilayer independent vacuum cavity structure heat insulation board has stable performance, prolongs the service life and is convenient for industrial production.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building technology, in particular to a multi-layer independent vacuum cavity structure heat insulation board, a preparation method thereof and an external wall heat preservation structure. BACKGROUND

[0002] In high-rise residential buildings, the proportion of heat loss of each part is: about 26.6% for external wall, about 34.4% for external window, about 4.6% for roof, about 6.4% for external door, about 8.7% for internal partition wall of stairwell, about 2.6% for ground, and about 16.7% for air permeation heat consumption. The current relevant regulations require that new buildings in all parts of the country must be built with building insulation, and existing buildings are also required to be energy-saving.

[0003] External wall external insulation refers to adding a material with low thermal conductivity as an insulation layer on the building external wall surface, so as to improve the building insulation or heat insulation performance. Common insulation materials include polyethylene foam board, extruded polystyrene board, rock wool board, polyurethane foam board, and inorganic insulation slurry.

[0004] The new "Residential Building Energy-saving Design Standard" increases the energy-saving rate of residential buildings from 75% to 80%, and the heat transfer coefficient K of the external wall (main section) is less than or equal to 0.23 W / (m2·K), so that the commonly used insulation materials are difficult to meet the standard requirements. Taking the heat transfer coefficient K of the external wall (main section) as an example, the thickness required by various insulation materials is: polyethylene foam board 200mm thick, extruded board 150mm thick, rock wool board 200mm thick, polyurethane foam board 120mm thick, and inorganic insulation mortar 700 thick. The insulation layer is thicker than the structure, which seriously encroaches on the use area, and cannot be effectively connected and fixed.

[0005] Vacuum insulation board (VIP) is currently the best material for insulation, mainly composed of core material, film material and getter, and the thermal conductivity can reach 0.004 W / (m·K). However, the vacuum sealed packaging is easily punctured and damaged by sharp objects during construction and transportation, resulting in the strong absorption of air by the board in the negative pressure state, which makes the board ineffective and unable to guarantee the insulation performance. Vacuum insulation board (VIP) cannot be cut and cannot be anchored and perforated, making it difficult to connect and fix with the structure. The size of the board is single, which cannot meet the diversification demand of the building facade, and the board and the finish are difficult to fix and connect. SUMMARY

[0006] In order to solve one or several technical problems existing in the prior art, the present application provides a multi-layer independent vacuum cavity structure heat insulation board, a preparation method thereof and an external wall heat preservation structure.

[0007] The technical scheme for solving the above technical problems is as follows: a multilayer independent vacuum cavity structure heat insulation board comprises a multichamber structure main plate, a hot melt sealing edge plate and an ultrasonic sealing edge plate, the hot melt sealing edge plate and the ultrasonic sealing edge plate are fixed at two ends of the multichamber structure main plate in the length direction, and the hot melt sealing edge plate and the ultrasonic sealing edge plate and the multichamber structure main plate form a closed vacuum structure chamber, the closed vacuum structure chamber is divided into multiple independent vacuum layers arranged along the thickness direction of the closed vacuum structure chamber by multiple cross-shaped spacing plates, each vacuum layer has multiple independent vacuum chambers arranged along the height direction, and the independent vacuum chambers extend along the length direction of the multichamber structure main plate.

[0008] The multilayer independent vacuum cavity structure heat insulation board has stable performance, prolongs the service life and is convenient for industrial production. The cross-shaped spacing plates can divide the independent vacuum chambers and can play a role in resisting pressure and supporting.

[0009] Based on the above technical scheme, the following improvements can be made.

[0010] Further, the multichamber structure main plate is provided with an upper outer wall hanging piece connecting structure edge and a lower outer wall hanging piece connecting structure edge at two ends in the height direction, and a limiting edge is further arranged at one end of the multichamber structure main plate in the height direction, and a hanging interval is reserved between the limiting edge and the first outer wall hanging piece connecting structure edge or the second outer wall hanging piece connecting structure edge.

[0011] The outer wall hanging piece connecting structure edges are flush with the dry construction hanging side, after installation, the outer side of the hanging piece is blocked by the vacuum chambers of the multilayer independent vacuum cavity structure heat insulation board, the installation point is blocked by at least one vacuum chamber, and the cold bridge phenomenon does not occur.

[0012] Further, the two side surfaces of the multichamber structure main plate are a dry construction hanging side and a surface connecting buckle mounting side, the upper outer wall hanging piece connecting structure edge and the lower outer wall hanging piece connecting structure edge are arranged close to the dry construction hanging side of the multichamber structure main plate and flush with the dry construction hanging side, and the limiting edge is arranged close to the surface connecting buckle mounting side of the multichamber structure main plate and flush with the surface connecting buckle mounting side of the multichamber structure main plate.

[0013] The outer wall hanging piece connecting structure edges are flush with the dry construction hanging side, after installation, the outer side of the hanging piece is blocked by the vacuum chambers of the multilayer independent vacuum cavity structure heat insulation board, the installation point is blocked by at least one vacuum chamber, and the cold bridge phenomenon does not occur.

[0014] Further, the sum of the width of the upper outer wall hanging piece connecting structure edge and the width of the lower outer wall hanging piece connecting structure edge is less than the width of the limiting edge.

[0015] The beneficial effect of the above further scheme is that the hanging piece can be conveniently placed in the gap between the upper outer wall hanging piece connecting structure edge and the lower outer wall hanging piece connecting structure edge of the two multi-cavity structure main plates, and the hanging piece can effectively constrain the multi-layer independent vacuum cavity structure heat insulation plate in four directions of up and down and outer wall flatness, thereby ensuring the flatness of the plate installation.

[0016] Further, one side of the upper outer wall hanging piece connecting structure edge away from the dry construction hanging side face is a first inclined surface, and one side of the lower outer wall hanging piece connecting structure edge away from the dry construction hanging side face is a second inclined surface.

[0017] The beneficial effect of the above further scheme is that the inclined surface forms an installation guide strip, facilitating the installation and insertion of the multi-layer independent vacuum cavity structure heat insulation plate, and making the hanging piece more easily connected and limited.

[0018] Further, the upper outer wall hanging piece connecting structure edge has a first structure edge vacuum cavity, and the lower outer wall hanging piece connecting structure edge has a second structure edge vacuum cavity, both of which are arranged along the length direction of the multi-cavity structure main plate. The limiting edge has a limiting edge vacuum cavity, which is arranged along the length direction of the multi-cavity structure main plate.

[0019] The beneficial effect of the above further scheme is that the structure edge adopts a vacuum cavity, so that when the two multi-cavity structure main plates are butt-jointed, the butt-jointed part also has a vacuum cavity superimposed, and when the plate is installed, the back of the hanging piece also has a vacuum cavity structure, so that the hanging piece is between two layers of vacuum cavities and is wrapped by the vacuum cavities, and the hanging piece does not become a direct heat conduction point. The arrangement of the structure edge vacuum cavity and the limiting edge vacuum cavity can ensure that there is no through gap after the plate is installed, thereby avoiding the formation of a cold bridge.

[0020] Further, one side of the multi-cavity structure main plate is also provided with a connecting groove, which is arranged along the length direction of the multi-cavity structure main plate, and a limiting protrusion is arranged at the groove opening of the connecting groove; the multi-cavity structure main plate, the hot melt edge sealing plate, the ultrasonic edge sealing plate, and the cross-shaped spacing plate are all made of hard plastic material.

[0021] The beneficial effect of the above further scheme is that the connecting groove cooperates with the outer facing hanging piece, and a buckle structure installation process is adopted, which is convenient to install and does not need to be fixed by screws.

[0022] Further, the vacuum degree of the closed vacuum structure cavity is ≤0.1 Pa; and the outer surface of the multi-cavity structure main plate is provided with a metal film layer.

[0023] The beneficial effect of the above further scheme is that: under the condition of vacuum degree ≤0.1 Pa, the heat conduction is relatively low, so that the heat insulation plate has excellent heat preservation performance. The outer surface is provided with a layer of metal film, which can effectively resist heat radiation conduction.

[0024] The preparation method of the multi-layer independent vacuum cavity structure heat insulation plate comprises the following steps:

[0025] S1, using an extrusion process to form a multi-cavity structure main plate with openings at both ends in the length direction, using an injection molding process to form an ultrasonic edge sealing plate, and using an injection molding process or an extrusion process to form a hot melt edge sealing plate, wherein the outer contour shape of the ultrasonic edge sealing plate is the same as the outer contour shape of the vertical cross section of the multi-cavity structure main plate, and the outer contour shape of the hot melt edge sealing plate is the same as the outer contour shape of the vertical cross section of the multi-cavity structure main plate;

[0026] One side of the ultrasonic edge sealing plate is a plane, and the other side has a convex rib with the same structure as the cross section of the multi-cavity structure main plate;

[0027] S2, the hot melt edge sealing plate is welded to the multi-cavity structure main plate at both ends respectively under the condition that the end face shape is adapted, so that each cavity of the multi-cavity structure main plate is independently sealed;

[0028] S3, after reserving a predetermined thickness of the hot melt edge sealing plate at both ends of the multi-cavity structure main plate, the remaining hot melt edge sealing plate is cut off to form a hot melt edge sealing plate at both ends of the multi-cavity structure main plate;

[0029] S4, a plurality of through holes are formed in one of the hot melt edge sealing plates, and the plurality of through holes are in one-to-one correspondence with the plurality of cavities of the multi-cavity structure main plate;

[0030] S5, the multi-cavity structure main plate with the hot melt edge sealing plate and the ultrasonic edge sealing plate are arranged in a vacuum machine respectively, the vacuum machine is subjected to vacuumizing treatment, so that the entire interior of the vacuum machine is in a negative pressure state; in the vacuum machine, the ultrasonic edge sealing plate is welded to the hot melt edge sealing plate with the through holes by ultrasonic welding; after welding is completed and the welding joint is fixed, the multi-layer independent vacuum cavity structure heat insulation plate is obtained.

[0031] The beneficial effect of the present application is that: the preparation method of the present application has stable and reliable process flow, low production cost, good vacuum degree of the formed multi-layer independent vacuum cavity structure heat insulation plate, good heat insulation effect, long vacuum degree decay time, 50 years decay to 70% of the original vacuum degree.

[0032] An external wall heat preservation structure, comprising an external heat preservation layer, a first hanging component, a second hanging component, a plurality of the multilayer independent vacuum cavity structure heat insulation plates, the plurality of the multilayer independent vacuum cavity structure heat insulation plates are arranged in butt joint along the height direction, the first hanging component is arranged between the height direction adjacent two multilayer independent vacuum cavity structure heat insulation plates, the first hanging component extends from the dry construction hanging side surface of the multilayer independent vacuum cavity structure heat insulation plate, the second hanging component is arranged on the surface connection buckle installation side surface of the multilayer independent vacuum cavity structure heat insulation plate, the second hanging component extends from the surface connection buckle installation side surface of the multilayer independent vacuum cavity structure heat insulation plate and is inserted into the external heat preservation layer and is fixed with the external heat preservation layer.

[0033] The beneficial effects of the present application are: the external wall heat preservation structure of the present application, the multilayer independent vacuum cavity structure heat insulation plate and the external heat preservation decorative plate are respectively installed, so that the splicing gap of the heat preservation layer of the external heat preservation decorative plate is staggered with the splicing gap of the multilayer independent vacuum cavity structure heat insulation plate, the through gap is avoided, the heat preservation effect is good, the structure stability is good, the installation and fixation are convenient, and the external wall surface is flexible. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a main structure schematic diagram of the multilayer independent vacuum cavity structure heat insulation plate of the present application.

[0035] Figure 2 It is a cross-sectional structure schematic diagram of the multilayer independent vacuum cavity structure heat insulation plate of the present application.

[0036] Figure 3 It is a main structure schematic diagram of the hot melt edge sealing plate of the present application.

[0037] Figure 4 It is a main structure schematic diagram of the ultrasonic edge sealing plate of the present application.

[0038] Figure 5 It is a side structure schematic diagram of the ultrasonic edge sealing plate of the present application.

[0039] Figure 6 It is a cross-sectional structure schematic diagram of the external wall heat preservation structure of the present application.

[0040] Figure 7 It is a main structure schematic diagram of the external wall heat preservation structure of the present application. Figure 6 It is an enlarged structure schematic diagram of the A part of the present application.

[0041] Figure 8 It is an enlarged structure schematic diagram of the B part of the present application. Figure 6 It is an enlarged structure schematic diagram of the B part of the present application.

[0042] Figure 9 It is a S1 schematic diagram of the preparation method of the multilayer independent vacuum cavity structure heat insulation plate of the present application.

[0043] Figure 10 It is a S2 schematic diagram of the preparation method of the multilayer independent vacuum cavity structure heat insulation plate of the present application.

[0044] Figure 11 S3 and S4 schematic diagram of the preparation method of the multi-layer independent vacuum cavity structure heat insulation board of the present application;

[0045] Figure 12 S5 schematic diagram of the preparation method of the multi-layer independent vacuum cavity structure heat insulation board of the present application.

[0046] In the drawings, the components represented by each reference numeral are listed as follows:

[0047] 1, multi-cavity structure main plate; 11, connecting groove; 12, limiting protrusion; 13, hot melt edge sealing plate; 14, ultrasonic edge sealing plate; 15, convex rib; 16, multi-cavity structure main plate; 17, hot melt edge sealing plate material; 18, through hole;

[0048] 2, independent vacuum cavity;

[0049] 3, first outer wall hanging piece connecting structure edge; 31, first structure edge vacuum cavity; 32, first inclined surface;

[0050] 4, second outer wall hanging piece connecting structure edge; 41, second structure edge vacuum cavity; 42, second inclined surface;

[0051] 5, limiting edge; 51, limiting edge vacuum cavity; 6, first hanging piece; 61, second hanging piece; 7, rock wool layer; 8, metal plate; 81, metal folded edge; 9, foam rod. DETAILED DESCRIPTION

[0052] The principles and characteristics of the present application are described below in conjunction with the drawings, and the examples are only used to explain the present application and are not used to limit the scope of the present application.

[0053] As shown in the drawings, Figures 1-8 The multi-layer independent vacuum cavity structure heat insulation board of the present embodiment includes a multi-cavity structure main plate 1, a hot melt edge sealing plate 13 and an ultrasonic edge sealing plate 14, the hot melt edge sealing plate 13 and the ultrasonic edge sealing plate 14 are respectively fixed at both ends of the length direction of the multi-cavity structure main plate 1, and form a closed vacuum structure cavity together with the multi-cavity structure main plate 1; the closed vacuum structure cavity is divided by a plurality of cross-shaped spacing plates to form a plurality of independent vacuum layers arranged along the thickness direction thereof, each vacuum layer has a plurality of independent vacuum cavities 2 arranged along the height direction, and the independent vacuum cavities 2 are arranged along the length direction of the multi-cavity structure main plate 1. The length direction is the direction indicated by arrow B in Figure 1 , and the thickness direction is the direction indicated by arrow A in Figure 2 .

[0054] Specifically, the independent vacuum cavities 2 of the adjacent two independent vacuum layers are correspondingly arranged, so that the multi-layer independent vacuum cavities form a support structure in the form of a cross-shaped partition plate structure in the heat insulation board. The support and cavity division are achieved by using the cross-shaped plate structure, so that the shape and size of each independent vacuum cavity 2 are the same, and the internal pressure of the board is balanced. The cross-shaped partition plate can separate multiple independent vacuum cavities and can play a role in resisting pressure and supporting. After vacuumizing, the whole multi-cavity structure main board is subjected to the action of atmospheric pressure and deforms inward. The cross-shaped partition plate effectively resists the action of atmospheric pressure, which can effectively ensure the size of the board.

[0055] The multi-cavity structure main board 1, the hot melt sealing edge plate 13, the ultrasonic sealing edge plate 14, and the cross-shaped partition plate of the embodiment are all made of hard plastic material with a thickness greater than or equal to 1 mm, which has good hardness, puncture resistance, and air tightness, so that the multi-cavity structure main board 1 is not easily punctured and damaged to cause air to enter and result in loss of thermal insulation performance. The multi-layer independent vacuum cavity structure and the vacuum state heat insulation principle are used to improve the thermal insulation performance of the building outer wall.

[0056] Further, the outer surface of the multi-cavity structure main board 1 of the embodiment can also be plated with a metal film layer. The metal film layer can be made of aluminum or silver, etc. The metal plating layer has the functions of anti-permeation and anti-radiation, which ensures the air tightness of the board.

[0057] As shown in Figure 2 and Figure 7 , the two ends of the multi-cavity structure main board 1 along the height direction are respectively provided with a first outer wall hanging piece connecting structure edge 3 and a second outer wall hanging piece connecting structure edge 4. One end of the multi-cavity structure main board 1 along the height direction is also provided with a limiting edge 5. The limiting edge 5 and the first outer wall hanging piece connecting structure edge 3 or the second outer wall hanging piece connecting structure edge 4 are reserved with a hanging interval. By arranging the outer wall hanging piece connecting structure edge, the two multi-cavity structure main boards can be abutted, and a hanging piece can be arranged between the first outer wall hanging piece connecting structure edge and the second outer wall hanging piece connecting structure edge of the two multi-cavity structure main boards, which is convenient for hanging and does not need to be drilled, etc. It is convenient for the outer wall construction and installation.

[0058] As shown in Figure 2 and Figure 7 , the two side surfaces of the multi-cavity structure main board 1 are respectively a dry construction hanging side surface and a finish connection buckle side surface. The first outer wall hanging piece connecting structure edge 3 and the second outer wall hanging piece connecting structure edge 4 are arranged close to the dry construction hanging side surface of the multi-cavity structure main board 1 and flush with the dry construction hanging side surface. The limiting edge 5 is arranged close to the finish connection buckle side surface of the multi-cavity structure main board 1 and flush with the finish connection buckle side surface of the multi-cavity structure main board 1. The outer wall hanging piece connecting structure edge is flush with the dry construction hanging side surface, which is convenient for the outer wall connection and fixation, and the structure stability is better.

[0059] As shown in Figure 7 The sum of the width of the first outer wall hanging piece connecting structure edge 3 and the width of the second outer wall hanging piece connecting structure edge 4 is less than the width of the limiting edge 5. It is convenient to put the hanging piece in the gap between the first outer wall hanging piece connecting structure edge and the second outer wall hanging piece connecting structure edge between the two multi-cavity structure main plates.

[0060] As shown in Figure 2 And Figure 7 The side of the first outer wall hanging piece connecting structure edge 3 away from the dry construction hanging side is a first inclined surface 32, and the side of the second outer wall hanging piece connecting structure edge 4 away from the dry construction hanging side is a second inclined surface 42. The arrangement of the inclined surface is convenient for the connection and limitation of the hanging piece.

[0061] As shown in Figure 2 And Figure 7 The first outer wall hanging piece connecting structure edge 3 has a first structure edge vacuum cavity 31, and the second outer wall hanging piece connecting structure edge 4 has a second structure edge vacuum cavity 41, and the first structure edge vacuum cavity 31 and the second structure edge vacuum cavity 41 are arranged along the direction B. The structure edge adopts the vacuum cavity, which is beneficial to further increase the heat insulation effect.

[0062] As shown in Figure 2 And Figure 7 The limiting edge 5 has a limiting edge vacuum cavity 51, and the limiting edge vacuum cavity 51 is arranged along the direction B.

[0063] As shown in Figure 8 The side of the multi-cavity structure main plate 1 is also provided with a connecting groove 11, which is arranged along the length direction of the multi-cavity structure main plate (the direction indicated by the arrow B), and a limiting protrusion 12 is arranged at the slot of the connecting groove 11; the multi-cavity structure main plate 1 is made of hard plastic.

[0064] The multi-layer independent vacuum cavity structure heat insulation plate has stable performance, prolongs the service life, and is convenient for industrialized production.

[0065] The advantages of the multi-layer independent vacuum cavity structure heat insulation board in the embodiment are analyzed from the principle of heat transfer: there are three ways of heat transfer: heat convection, heat radiation, and heat conduction. For heat convection: the chambers of the multi-layer independent vacuum cavity structure heat insulation board are in a vacuum state, the internal air is thin, and the thickness of the single-layer chamber is not greater than 15 mm, so that the heat insulation board has no gas flow, and therefore heat convection cannot occur. For heat radiation: the outer side of the multi-layer independent vacuum cavity structure heat insulation board is plated with a metal film, which can enhance the air tightness of the board and improve the anti-permeation performance, and the metal plating layer can effectively block heat radiation transmission. For heat conduction: in an absolute vacuum state, heat cannot be transferred by heat conduction, and the thermal conductivity λ in the absolute vacuum state is 0. However, in the industrial production application of the product, it is impossible to achieve an absolute vacuum state, and the commonly used vacuum degree is 0.1 pa, and the heat conduction is low. Since the single vacuum chamber still has a certain heat transfer performance, the patent adopts a multi-layer independent vacuum cavity structure, each chamber has very low heat conduction performance, and the heat conduction performance of the vacuum board is reduced by multiple levels through the superposition of the multi-layer vacuum cavity structure, thereby further improving the overall heat preservation performance of the board. In order to ensure that the vacuum state of the board is not easily damaged, the vacuum board should not use two (or more) materials with a large difference in heat shrinkage ratio, otherwise the joint will be damaged and the air will be permeable during repeated heat shrinkage, and the vacuum performance will be lost. Therefore, the material used in the patent is a single hard plastic material, which is sealed by welding and has the same heat shrinkage performance, and will not be damaged by fatigue during repeated heat shrinkage. Since the inner chamber of the vacuum board is in a negative pressure state, it is in a natural environment, and the atmospheric pressure acts on the surface of the vacuum board, causing the surface of the board to be pressed inward. The outer walls of the single-cavity structure vacuum board are not supported between the two sides, and the thickness of the outer walls of the vacuum board needs to be increased, or the size of the vacuum board needs to be reduced, to resist the atmospheric pressure. Therefore, the single-cavity structure wastes materials and increases costs, which is not conducive to market promotion. The multi-cavity structure main board of the embodiment is provided with a cross-shaped support partition plate, which can effectively resist atmospheric pressure, increase the size of the single board, reduce the number of board splicing edges, improve the heat preservation performance, reduce the amount of material used, and reduce the cost of the product. The multi-layer independent cavity structure adopted in the embodiment has the same vacuum degree in all the chambers, and the air pressure is balanced in the board, so that the chamber partition plate will not be deformed and attached. The multi-layer independent vacuum cavity structure heat insulation board has considered the related pendant connection structure in the processing and production, and is simple to install in the application of external wall thermal insulation. The price of the hard plastic raw material is low, the processing technology is mature, and it is widely used in the construction industry and easy to promote.

[0066] The embodiment also provides a preparation method of the multi-layer independent vacuum cavity structure heat insulation board. Figures 9-12 As shown in the figure, the method comprises the following steps:

[0067] S1, the length direction two ends of the opening of the multi-cavity structure main plate 1 are formed by using the extrusion process, the ultrasonic edge sealing plate 14 is formed by using the injection molding process, and the hot melt edge sealing plate material 17 is formed by using the injection molding process or the extrusion process, and the hot melt edge sealing plate material 17 has a certain length. Wherein, the outer contour shape of the ultrasonic edge sealing plate 14 is the same as the vertical cross-section outer contour shape of the multi-cavity structure main plate 1, and the outer contour shape of the hot melt edge sealing plate 14 is the same as the vertical cross-section outer contour shape of the multi-cavity structure main plate 1;

[0068] One side of the ultrasonic edge sealing plate 14 is a plane, and the other side has a convex rib 15 with the same configuration as the cross section of the multi-cavity structure main plate 16, as shown in Figure 4 The thickness of the ultrasonic edge sealing plate 14 can be set as required, and the thickness is the thickness along the direction A;

[0069] S2, the hot melt edge sealing plate material 17 is welded at both ends of the multi-cavity tubular main body 16 under the condition that the end face shape is matched, so that each cavity tube of the multi-cavity structure main plate 16 is independently sealed;

[0070] S3, after reserving a predetermined thickness of the hot melt edge sealing plate material 17 at both ends of the multi-cavity structure main plate 16, the remaining hot melt edge sealing plate material 17 is cut to form a hot melt edge sealing plate 13 at both ends of the multi-cavity structure main plate 16, and the shape of the hot melt edge sealing plate 13 is as shown in Figure 3 The thickness can be cut as required, and the thickness is the thickness along the direction A;

[0071] S4, a plurality of through holes 18 are formed in one of the hot melt edge sealing plates 13, and the plurality of through holes 18 are in one-to-one correspondence with the plurality of cavity tubes of the multi-cavity structure main plate 16;

[0072] S5, the multi-cavity structure main plate 16 with the hot melt edge sealing plate 13 and the ultrasonic edge sealing plate 14 are arranged in a vacuum machine, the vacuum machine is subjected to vacuum treatment, so that the entire vacuum machine is in a negative pressure state; in the vacuum machine, the ultrasonic edge sealing plate 14 is welded on the hot melt edge sealing plate 13 with the through holes 18 by using ultrasonic welding; after welding is completed and the welding joint is fixed, the multi-layer independent vacuum cavity structure heat insulation plate is obtained.

[0073] The preparation method of the embodiment is stable and reliable in process flow, low in production cost, good in vacuum degree of the formed multi-layer independent vacuum cavity structure heat insulation plate, and good in heat insulation effect.

[0074] The embodiment also provides an external wall heat preservation structure, as shown in Figures 6-8As shown, including the outer thermal insulation layer, the first hanging piece 6, the second hanging piece 61, a plurality of the multilayer independent vacuum cavity structure heat insulation board, a plurality of the multilayer independent vacuum cavity structure heat insulation board is arranged in the height direction and is abutted, and the first hanging piece 6 is arranged between the adjacent two multilayer independent vacuum cavity structure heat insulation boards, the first hanging piece 6 is arranged on the dry construction hanging side of the multilayer independent vacuum cavity structure heat insulation board 1; The second hanging piece 61 is arranged on the surface connection buckle side of the multilayer independent vacuum cavity structure heat insulation board 1, and the second hanging piece 61 is arranged on the surface connection buckle side of the multilayer independent vacuum cavity structure heat insulation board 1 and is inserted into the outer thermal insulation layer and is clamped and fixed with the outer thermal insulation layer.

[0075] Specifically, the outer thermal insulation layer of the embodiment includes a rock wool layer 7 and a metal plate 8, the metal plate 8 is fixed on one side of the rock wool layer 7, and the rock wool layer 7 is fixed on the surface connection buckle side of the multilayer independent vacuum cavity structure heat insulation board. The middle part of the metal plate 8 is provided with two oppositely arranged metal folded edges 81, the middle part of the rock wool layer 7 is provided with a through hole, and the metal folded edges 81 are inserted into the through hole; The second hanging piece 61 is inserted into the through hole and is clamped with the metal folded edge, and the foam rod 9 is inserted between the two oppositely arranged metal folded edges 81, so that the metal folded edge 81 and the second hanging piece 61 are clamped and limited.

[0076] The outer wall thermal insulation structure of the embodiment has good thermal insulation effect, good structural stability and convenient installation and fixation.

[0077] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0078] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0079] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0080] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0082] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A multilayered independent vacuum cavity construction thermal insulation panel, characterized in that, The multi-cavity structure main plate, the hot melt sealing plate and the ultrasonic sealing plate are fixed at two ends of the length direction of the multi-cavity structure main plate respectively, and form a closed vacuum structure cavity together with the multi-cavity structure main plate. The closed vacuum structure cavity is divided into multiple independent vacuum layers arranged along the thickness direction by multiple cross-shaped spacing plates, each vacuum layer has multiple independent vacuum cavities arranged along the height direction, and the independent vacuum cavities are arranged along the length direction of the multi-cavity structure main plate. The multi-cavity structure main plate is provided with an upper outer wall hanging piece connecting structure edge and a lower outer wall hanging piece connecting structure edge at two ends along the height direction respectively, and is further provided with a limiting edge at one end along the height direction, and a hanging interval is reserved between the limiting edge and the upper outer wall hanging piece connecting structure edge or the lower outer wall hanging piece connecting structure edge. One side surface of the multi-cavity structure main plate is further provided with a connecting groove extending along the length direction of the multi-cavity structure main plate, and a limiting protrusion is arranged at the groove opening of the connecting groove. The upper outer wall hanging piece connecting structure edge has a first structure edge vacuum cavity, the lower outer wall hanging piece connecting structure edge has a second structure edge vacuum cavity, and the first structure edge vacuum cavity and the second structure edge vacuum cavity are arranged along the length direction of the multi-cavity structure main plate.

2. The multilayered independent vacuum chamber construction thermal insulation panel according to claim 1, characterized in that, The limiting edge has a limiting edge vacuum cavity arranged along the length direction of the multi-cavity structure main plate.

3. The multi-layered independent vacuum chamber constructed thermal insulation panel according to claim 1, wherein, The two side surfaces of the multi-cavity structure main plate are a dry construction hanging side surface and a decorative connection buckle installation side surface respectively, the upper outer wall hanging piece connecting structure edge and the lower outer wall hanging piece connecting structure edge are arranged close to the dry construction hanging side surface of the multi-cavity structure main plate and flush with the dry construction hanging side surface, and the limiting edge is arranged close to the decorative connection buckle installation side surface of the multi-cavity structure main plate and flush with the decorative connection buckle installation side surface of the multi-cavity structure main plate.

4. The multi-layered independent evacuated cavity construction panel according to claim 2, wherein, The sum of the width of the upper outer wall hanging piece connecting structure edge and the width of the lower outer wall hanging piece connecting structure edge is less than the width of the limiting edge.

5. The method of producing a multilayered independent vacuum cavity-constructed thermal insulation board according to any one of claims 1 to 4, characterized in that, The side surface of the upper outer wall hanging piece connecting structure edge away from the dry construction hanging side surface is a first inclined surface, and the side surface of the lower outer wall hanging piece connecting structure edge away from the dry construction hanging side surface is a second inclined surface. The steps include: S1, forming a multi-cavity structure main plate with openings at two ends along the length direction by using an extrusion process, forming an ultrasonic sealing plate by using an injection molding process, and forming a hot melt sealing plate by using an injection molding process or an extrusion process, wherein the outer contour shape of the ultrasonic sealing plate is the same as the vertical section outer contour shape of the multi-cavity structure main plate, and the outer contour shape of the hot melt sealing plate is the same as the vertical section outer contour shape of the multi-cavity structure main plate; One side surface of the ultrasonic sealing plate is a plane, and the other side surface has a convex rib with the same structure as the vertical section of the multi-cavity structure main plate. S2, respectively welding hot melt sealing plate material at the opening of both ends of the multi-cavity structure main plate under the condition of adapting to the end face shape, so that each cavity tube of the multi-cavity structure main plate is independently sealed; S3, after reserving a preset thickness at both ends of the hot melt sealing plate material of the multi-cavity structure main plate, cutting the remaining hot melt sealing plate material, forming a hot melt sealing plate at both ends of the multi-cavity structure main plate; S4, a plurality of through holes are formed on one of the hot melt sealing plates, and the plurality of through holes are in one-to-one correspondence with the plurality of cavity tubes of the multi-cavity structure main plate; S5, arranging the multi-cavity structure main plate with hot melt sealing plate and the ultrasonic sealing plate in a vacuum machine respectively, vacuumizing the vacuum machine to make the inside of the vacuum machine in a negative pressure state; in the vacuum machine, the ultrasonic sealing plate is welded on the hot melt sealing plate with through holes by ultrasonic welding; after welding and waiting for the welding joint to be fixed, the multi-layer independent vacuum cavity structure heat insulation plate is obtained.

6. An external wall insulation structure, characterized by, The outer thermal insulation layer, the first hanging part, the second hanging part, a plurality of multi-layer independent vacuum cavity structure heat insulation plates according to any one of claims 1 to 4, a plurality of the multi-layer independent vacuum cavity structure heat insulation plates are arranged in abutment along the height direction, a first hanging part is clamped between two adjacent multi-layer independent vacuum cavity structure heat insulation plates, the first hanging part extends from the dry construction hanging side of the multi-cavity structure main plate; the surface connection buckle installation side of the multi-cavity structure main plate is provided with a second hanging part, the second hanging part extends from the surface connection buckle installation side of the multi-cavity structure main plate and is inserted into the outer thermal insulation layer and is clamped and fixed with the outer thermal insulation layer.

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