Double-wall sandwich insulation board and forming system and forming method thereof

Abstract

The invention provides a double-wall sandwich insulation board and a forming system and a forming method thereof, and belongs to the field of insulation laminated wallboards, the double-wall sandwich insulation board structurally comprises a supporting keel, an insulation board, a structural net and a concrete covering layer, the supporting keel is at least provided with two rows of through holes and two rows of positioning pieces, and the positioning pieces serve as positioning installation pieces of the insulation board on one hand and serve as positioning installation pieces of the insulation board on the other hand; on the other hand, the positioning pieces are used as tying pieces of the concrete covering layers on the two sides, and the wall bodies on the two sides are tied to form an integrated double-wall structure through the bolting effect of the positioning pieces and the concrete covering layers on the two sides and the cooperation of the supporting keels; the through holes facilitate the installation of the structural net and can also be used as through connecting ports for supporting the concrete covering layers on the two sides of the keel; according to the scheme, structural net mounting pieces such as wires and mounting nails are not needed, and the strength of the whole plate is higher through cooperation of the supporting keels and the concrete covering layer.

Description

Technical Field

[0001] The invention belongs to the field of thermal insulation composite wall panels, and in particular relates to a double-wall sandwich thermal insulation panel and a forming system and a forming method thereof. Background Art

[0002] Sandwich insulation board (abbreviated as "sandwich insulation board") refers to a composite board formed by sandwiching insulation materials between two layers of concrete wall panels. It is generally widely used in exterior walls. It can enhance the energy-saving performance of exterior wall insulation, reduce the risk of exterior wall fire, increase the insulation life of wall panels, and thus reduce the maintenance cost of exterior walls.

[0003] However, the existing sandwich insulation boards have some disadvantages during installation and construction. For example, in JGJ-T269-2012 "Technical Specification for Application of Light Steel Wire Mesh Polystyrene Board Concrete Components", the insulation board (polystyrene board) fixes the steel wire mesh on both sides by obliquely inserting wires. During construction, workers are required to insert wires on both sides, resulting in a waste of labor costs. In the Chinese patent CN118881061A lightweight composite wall and its installation method, a solution for positioning the sandwich lightweight wallboard by using a Z-shaped vertical keel is recorded. The two side flanges of the Z-shaped steel are formed with reversible folding buckles, and the lightweight wallboard is clamped and fixed by flipping the folding buckles to match the flanges in relative positions. Although the structural stability and convenience are improved, the installation of the structural net still needs to be fixed by threading and pulling or by anchors such as nails during actual operation. Moreover, there is no synergistic effect between the concrete structural layers and the keels on both sides, and only the effect of separate single walls on both sides is achieved.

[0004] Therefore, how to provide a sandwich insulation board with better structural strength and easier installation and forming is a problem to be solved urgently in the present invention.

[0005] It should be noted that the information disclosed in the background technology section of the invention is only intended to deepen the understanding of the general background technology of the invention, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to those skilled in the art. Summary of the invention

[0006] One object of the present invention is to provide a sandwich insulation board with better structural strength and easier installation and forming; A second object of the present invention is to form a molding system to better improve the structural strength and installation convenience of the sandwich insulation board.

[0007] The third object of the present invention is to form a molding method to better improve the structural strength and installation convenience of the sandwich insulation board.

[0008] In order to solve the above-mentioned one purpose, the present invention first provides a double-wall sandwich insulation board, comprising a supporting keel, an insulation board, a structural net and a concrete covering, wherein a plurality of the supporting keels are arranged side by side with spacing, the insulation board is located between adjacent supporting keels, the structural net is laid on both sides of the supporting keels and the insulation board arranged side by side, and the concrete covering is coated on the structural net; wherein: At least two rows of through holes and two rows of positioning pieces are provided on the supporting keel, and the two rows of through holes and the two rows of positioning pieces are respectively located on both sides of the insulation board, and the insulation board is positioned and clamped between the two rows of positioning pieces, and the structural net is tied to the supporting keel through the through holes; the positioning pieces are bolted into the concrete covering, and the supporting keel cooperates with the positioning pieces to jointly tie the concrete coverings on both sides to form a double-wall structure.

[0009] Preferably, the supporting keel is a light steel keel, the through hole is punched out of the light steel keel facing the insulation board, and the punched area is bent to form the positioning piece; multiple positioning pieces on the light steel keel are arranged at intervals in the height direction, and multiple positioning pieces are bent in sequence facing both sides.

[0010] Preferably, the positioning member is a positioning plate, the positioning plate is perpendicular to the side plate surface of the insulation board, and the positioning plate is bolted to the concrete covering.

[0011] Preferably, the structural net is a flat net or a corrugated net.

[0012] The technical effects produced by the above technical solution of the present invention come from one or more of the following combinations: In this solution, at least two rows of through holes and two rows of positioning pieces are provided on the supporting keel, and the positioning pieces are used as positioning and mounting pieces of the insulation board on one hand, and as anchoring pieces of the concrete coverings on both sides on the other hand. Through the bolting action of the positioning pieces and the concrete coverings on both sides, the supporting keel is cooperated to tie the walls on both sides to form an integrated double-wall structure; the through holes facilitate the installation of the structural net and can also serve as through-connecting openings for the concrete coverings on both sides of the supporting keel; this means that in this solution, there is no need for structural net mounting pieces such as threading and mounting nails, and the strength of the overall board is stronger due to the coordination of the supporting keel and the concrete covering.

[0013] Compared with traditional tools such as oblique screws, the positioning piece is anchored in the concrete covering and only needs single-sided operation, which can save labor on one side; at the same time, the material eliminates the need for anchors, and the anchor can be formed by itself in conjunction with the supporting keel.

[0014] On one hand, the through holes can connect the concrete coverings on both sides of the supporting keel to form a better integrated structure; on the other hand, they can be directly used for binding and installation of the structural net.

[0015] The through holes and the positioning pieces can be formed by stamping the supporting keel structure itself, which is simple and convenient.

[0016] To solve the above-mentioned second purpose, the present invention provides a double-wall sandwich insulation board forming system, including a double-wall sandwich insulation board and a coating device; the concrete covering is formed by coating by the coating device, the coating device includes a push rod, a spraying pipe and a plastering board, the push rod is supported on the plastering board, the plastering board includes a plastering plate body and a slurry collecting plate body, the spraying pipe is arranged on the slurry collecting plate body, the spraying pipe sprays slurry in the slurry collecting space between the slurry collecting plate body and the insulation board and is smoothed by the slurry collecting plate body, thereby forming a coating area of ​​the concrete covering.

[0017] Preferably, the screed plate body and the slurry collecting plate body form a certain angle for receiving the slurry.

[0018] Preferably, there are multiple spraying pipes, which are evenly arranged along the grouting plate body.

[0019] Preferably, the push rod is provided with a plurality of legs, some of which are hinged to the trowel plate body; and some of which are supported on the slurry plate body through elastic members.

[0020] Preferably, the width of the screed plate body and the slurry plate body is not less than the distance between two adjacent supporting keels.

[0021] The technical effects produced by the above technical solution of the present invention come from one or more of the following combinations: In this scheme, the double-wall sandwich insulation board is sprayed and plastered by a coating device. Compared with the traditional multi-layer plastering, the slurry is sprayed on the slurry space between the slurry board body and the insulation board by a spraying pipe and smoothed by a plastering plate body, thereby forming a coating area of ​​the concrete covering, and then the operation is repeated to form an overall concrete covering, which greatly improves the efficiency of plastering.

[0022] The width of the trowel plate body and the slurry plate body is set to be not less than the distance between two adjacent supporting keels, so that the two supporting keels become the plastering side molds, and the plastering and forming can be performed in one time in conjunction with the insulation board and the trowel plate body.

[0023] Traditional spraying can only spray half a centimeter thick each time, and needs to be sprayed in sequence; traditional hand-spreading is not easy to compact, and the labor cost is high. This solution can improve the efficiency of plastering and cooperate with the trowel plate to compact and improve the strength of the slurry.

[0024] To solve the above three purposes, the present invention provides a forming method of a double-wall sandwich insulation board forming system, comprising the following steps: Arrange a plurality of the supporting keels in parallel and at intervals, and pre-form two rows of through holes and two rows of positioning members on the supporting keels; Arrange a heat preservation board between adjacent supporting keels, and position and clamp the heat preservation board between two rows of positioning members; The structural net is tied through the through holes on both sides of the supporting keel; At least the area between two adjacent supporting keels is used as a coating area of ​​the concrete covering, and the coating is sprayed and smoothed in the direction of the plate height by a coating device, and is coated and smoothed side by side in sequence.

[0025] The technical effects produced by the above technical solution of the present invention come from one or more of the following combinations: By opening at least two rows of through holes and two rows of positioning pieces on the supporting keel, compared with the traditional structural mesh installation form, this solution does not require tie pieces and installation pieces such as oblique inserts and installation nails. The single-sided operation is simple and efficient. The positioning pieces serve as both installation pieces for the insulation board and as anchors for the concrete coverings on both sides, so that the supporting keel and the concrete coverings on both sides work together to form a double-wall structure.

[0026] The coating device is used to spray and smooth the surface in the direction of the plate height, and the construction efficiency is much higher than that of traditional spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The product structure diagram of the double-wall sandwich insulation board of the present invention is expressed.

[0028] Figure 2 The skeleton diagram of the double-wall sandwich insulation board of the present invention is expressed.

[0029] Figure 3 The structural disassembly diagram of the double-wall sandwich insulation board of the present invention is expressed.

[0030] Figure 4 Expressed Figure 3 A partial enlargement of the figure.

[0031] Figure 5 The structural diagram of the supporting keel in the double-wall sandwich insulation board of the present invention is expressed.

[0032] Figure 6 The schematic diagram of the structure of the double-wall sandwich insulation board forming system of the present invention is expressed.

[0033] Figure 7 Expressed Figure 6 A partial enlargement of the figure.

[0034] Figure 8 The schematic diagram of the structure of the coating device in the double-wall sandwich insulation board forming system of the present invention is expressed.

[0035] Among them: 1. Support keel; 10. Through hole; 11. Positioning piece; 2. Insulation board; 3. Structural mesh; 4. Concrete covering; 5. Coating device; 51. Push rod; 52. Spraying pipe; 53. Plastering board; 531. Plastering plate body; 532. Slurry board body; 54. Support foot; 541. Spring. DETAILED DESCRIPTION

[0036] The following description is given to enable those skilled in the art to implement and use the invention and incorporate it into a specific application context. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Thus, the present invention is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0037] In the following detailed description, many specific details are set forth to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the practice of the present invention need not be limited to these specific details. In other words, known structures and devices are shown in block diagram form without detailed display to avoid obscuring the present invention.

[0038] The reader is reminded of all documents and literature filed simultaneously with this specification and open to public inspection, and the contents of all such documents and literature are incorporated herein by reference. Unless otherwise directly stated, all features disclosed in this specification (including any attached claims, abstracts and drawings) can be replaced by alternative features for achieving the same, equivalent or similar purposes. Therefore, unless otherwise explicitly stated, each feature disclosed is only an example of a group of equivalent or similar features.

[0039] Note that, where used, the symbols left, right, front, back, top, bottom, forward, reverse, clockwise and counterclockwise are used only for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or direction between the various parts of the object. In addition, the terms "first" and "second" are used only for descriptive purposes and should not be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Note that, in the case of use, further, preferably, further and more preferably are simple beginnings for explaining another embodiment based on the previous embodiment, and the content of further, preferably, further or more preferably followed by the above embodiment is combined with the previous embodiment as a complete composition of another embodiment. Several further, preferably, further or more preferably settings followed by the same embodiment can be arbitrarily combined to form another embodiment.

[0042] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0043] Embodiment 1: See also Figure 1 to Figure 6 This embodiment provides a double-wall sandwich insulation board, including a support keel 1, an insulation board 2, a structural net 3 and a concrete covering 4. A plurality of support keels 1 are arranged side by side with spacing, the insulation board 2 is located between adjacent support keels 1, the structural net 3 is laid on both sides of the support keels 1 and the insulation board 2 arranged side by side, and the concrete covering 4 is coated on the structural net 3. Further, at least two rows of through holes 10 and two rows of positioning members 11 are opened on the support keel 1, the two rows of through holes 10 and the two rows of positioning members 11 are respectively located on both sides of the insulation board 2, the insulation board 2 is positioned and clamped between the two rows of positioning members 11, the structural net 3 is tied to the support keel 1 through the through holes 10; the positioning member 11 is bolted into the concrete covering 4, and the support keel 1 cooperates with the positioning member 11 to pull the concrete covering 4 on both sides to form a double-wall structure.

[0044] See also Figure 5 The supporting keel 1 adopts a light steel keel, and its structure can be a steel plate or channel steel structure. The light steel keel is punched to form a through hole 10 facing the insulation board 2, and the punched area is bent to form a positioning piece 11. In the factory, the light steel keel is embossed with three-sided grooves by equipment, and the bottom is kept closed. When the insulation board 2 is installed, the embossed part is bent outward to form the positioning piece 11, and the embossed area after bending forms a through hole 10. Specifically, multiple positioning pieces 11 on the light steel keel are arranged at intervals in the height direction, and multiple positioning pieces 11 are bent and formed in sequence facing both sides, so as to clamp the insulation board 2 on both sides of each light steel keel. Furthermore, the positioning piece 11 is a positioning plate, which is perpendicular to the side plate surface of the insulation board 2, and the positioning plate is bolted to the concrete covering 4.

[0045] The insulation board 2 is a light wallboard, such as a polystyrene board, which is not limited here.

[0046] The structural net 3 of this embodiment is a steel net, and its structure can be a flat net or a corrugated net. In a preferred implementation manner of this embodiment, the structural net 3 is a flat net.

[0047] Beneficial effects of this embodiment: At least two rows of through holes 10 and two rows of positioning members 11 are provided on the supporting keel 1, and the positioning members 11 are used as positioning and mounting members of the insulation board 2 on one hand, and as anchoring members of the concrete coverings 4 on both sides on the other hand. Through the bolting action of the positioning members 11 and the concrete coverings 4 on both sides, the supporting keel 1 is cooperated to tie the walls on both sides to form an integrated double-wall structure; and the through holes 10 facilitate the installation of the structural net 3 and can also serve as the through-connecting ports of the concrete coverings 4 on both sides of the supporting keel 1; so that in this solution, there is no need for structural net 3 mounting members such as threading and mounting nails, and the strength of the overall board is stronger through the cooperation of the supporting keel 1 and the concrete covering 4.

[0048] Compared with traditional tools such as oblique screws, the positioning member 11 is anchored in the concrete covering 4 and only needs to be operated on one side, which can save labor on one side; at the same time, the material eliminates the need for anchors, and the support keel 1 itself can form an anchor.

[0049] On one hand, the through hole 10 can connect the concrete covering layers 4 on both sides of the supporting keel 1 to form a better integrated structure; on the other hand, it can be directly used for binding and installing the structural net 3.

[0050] The through hole 10 and the positioning piece 11 can be formed by stamping the supporting keel 1 itself, which is simple and convenient.

[0051] Embodiment 2: See also Figure 7 , Figure 8 Combined with Figure 1 to Figure 6 The present embodiment provides a double-wall sandwich insulation board forming system, including a double-wall sandwich insulation board and a coating device 5; the concrete covering 4 is formed by coating by the coating device 5, the coating device 5 includes a push rod 51, a spraying pipe 52 and a plastering board 53, the push rod 51 is supported on the plastering board 53, the plastering board 53 includes a plastering plate body 531 and a slurry collecting plate body 532, the spraying pipe 52 is arranged on the slurry collecting plate body 532, the spraying pipe 52 sprays slurry in the slurry collecting space between the slurry collecting plate body 532 and the insulation board 2 and is smoothed by the slurry collecting plate body 531, thereby forming a coating area of ​​the concrete covering 4.

[0052] The plastering plate body 531 and the slurry collecting plate body 532 in the plastering plate 53 are integrally formed, and the two form a roughly inclined angle. This embodiment does not specifically limit the angle, and the purpose is to form a certain angle for receiving the slurry between the plastering plate body 531 and the slurry collecting plate body 532. The spraying pipe 52 can be one or more, preferably multiple, and the multiple spraying pipes 52 are evenly arranged along the slurry collecting plate body 532.

[0053] The plastering board 53 is plastered by manually holding a push rod 51. In order to adapt to different angle changes during plastering, a plurality of legs 54 are provided on the push rod 51, wherein some legs 54 are hinged to the plastering plate body 531, and some legs 54 are supported on the slurry board body 532 through elastic members. Specifically, the legs 54 and the plastering plate body 531 are connected by hinges or universal shafts. The elastic member is preferably a spring 541, which is connected between the slurry board body 532 and the legs 54, so as to adapt to different angle changes in the plastering process from bottom to top.

[0054] In order to better perform the spray coating, the present embodiment optimizes the design to use the area between two adjacent support keels 1 as a coating area. Correspondingly, the width of the trowel plate body 531 and the slurry plate body 532 is not less than the distance between two adjacent support keels 1, so when the trowel plate body 531 is smoothed, it can be smoothed at one time with the side mold effect formed by the support keels 1 on both sides, reducing slurry leakage.

[0055] Beneficial effects of this embodiment: The double-wall sandwich insulation board is sprayed and plastered by the coating device 5. Compared with the traditional multi-layer plastering, this solution sprays the slurry on the slurry space between the slurry board body 532 and the insulation board 2 through the spraying pipe 52 and is smoothed by the plastering plate body 531, thereby forming a coating area of ​​the concrete covering 4, and then repeating the operation to form an overall concrete covering 4, which greatly improves the efficiency of plastering.

[0056] The width of the plastering plate body 531 and the slurry plate body 532 is set to be not less than the distance between two adjacent supporting keels 1, so that the two supporting keels 1 become plastering side molds, and the plastering and forming can be performed once in cooperation with the insulation board 2 and the plastering plate body 531.

[0057] Traditional spraying can only spray half a centimeter thick each time, and needs to be sprayed in sequence; traditional hand-spreading is not easy to compact, and the labor cost is high. This solution can improve the efficiency of plastering and cooperate with the trowel plate 531 to compact and improve the strength of the slurry.

[0058] Embodiment 3: Please combine Figure 1 to Figure 8 This embodiment provides a forming method of a double-wall sandwich insulation board forming system, comprising the following steps: S1: multiple supporting keels 1 are arranged side by side with a spacing, and two rows of through holes 10 and two rows of positioning members 11 are preset on the supporting keels 1.

[0059] Specifically, the supporting keel 1 adopts a light steel keel, and its structure can be a steel plate or channel steel structure. The light steel keel is punched to form a through hole 10 facing the insulation board 2, and the punched area is bent to form a positioning piece 11. In the factory, the light steel keel is embossed with three-sided grooves by equipment, and the bottom is kept closed. When installing the insulation board 2, the embossed part is bent outward to form the positioning piece 11, and the embossed area after bending forms the through hole 10. Multiple positioning pieces 11 on the light steel keel are arranged at intervals in the height direction, and multiple positioning pieces 11 are bent and formed in sequence facing both sides, so as to clamp the insulation board 2 on both sides of each light steel keel. Furthermore, the positioning piece 11 is a positioning plate.

[0060] S2: Arrange the insulation board 2 between adjacent supporting keels 1 , and position and clamp the insulation board 2 between two rows of positioning members 11 .

[0061] Specifically, the insulation board 2 is made of a lightweight wallboard, such as a polystyrene board, which is not limited here. Furthermore, the positioning plate is perpendicular to the side surface of the insulation board 2 .

[0062] S3: Bind the structural net 3 on both sides of the supporting keel 1 through the through holes 10 .

[0063] Specifically, the structural net 3 of the embodiment is a steel net, and its structure can be a flat net or a corrugated net. In a preferred implementation of this embodiment, the structural net 3 is a flat net.

[0064] S4: At least the area between two adjacent supporting keels 1 is used as a coating area of ​​the concrete covering layer 4, and the coating device 5 is used to spray and smooth the concrete in the direction of the plate height, and the concrete is sprayed and smoothed side by side in sequence.

[0065] Specifically, the coating device 5 includes a push rod 51, a spraying pipe 52 and a plastering plate 53. The push rod 51 is supported on the plastering plate 53. The plastering plate 53 includes a plastering plate body 531 and a slurry collecting plate body 532. The spraying pipe 52 is arranged on the slurry collecting plate body 532. The spraying pipe 52 sprays slurry in the slurry collecting space between the slurry collecting plate body 532 and the insulation board 2 and is smoothed by the slurry collecting plate body 531, thereby forming a coating area of ​​the concrete covering 4, and the positioning plate in the coating area is bolted inside.

[0066] The plastering plate body 531 and the slurry collecting plate body 532 in the plastering plate 53 are integrally formed, and the two form a roughly inclined angle. This embodiment does not specifically limit the angle, and the purpose is to form a certain angle for receiving the slurry between the plastering plate body 531 and the slurry collecting plate body 532. The spraying pipe 52 can be one or more, preferably multiple, and the multiple spraying pipes 52 are evenly arranged along the slurry collecting plate body 532.

[0067] The plastering board 53 is plastered by manually holding a push rod 51. In order to adapt to different angle changes during plastering, a plurality of legs 54 are provided on the push rod 51, wherein some legs 54 are hinged to the plastering plate body 531, and some legs 54 are supported on the slurry board body 532 through elastic members. Specifically, the legs 54 and the plastering plate body 531 are connected by hinges or universal shafts. The elastic member is preferably a spring 541, which is connected between the slurry board body 532 and the legs 54, so as to adapt to different angle changes in the plastering process from bottom to top.

[0068] In order to better perform the spray coating, the present embodiment optimizes the design to use the area between two adjacent support keels 1 as a coating area. Correspondingly, the width of the trowel plate body 531 and the slurry plate body 532 is not less than the distance between two adjacent support keels 1, so when the trowel plate body 531 is smoothed, it can be smoothed at one time with the side mold effect formed by the support keels 1 on both sides, reducing slurry leakage.

[0069] Beneficial effects of this embodiment: By providing at least two rows of through holes 10 and two rows of positioning members 11 on the supporting keel 1, compared with the traditional installation form of the structural mesh 3, the present solution does not require tie members and installation members such as oblique inserts and installation nails, and the single-sided operation is simple and efficient. The positioning members 11 serve as both installation members for the insulation board 2 and as anchors for the concrete coverings 4 on both sides, so that the supporting keel 1 and the concrete coverings 4 on both sides work together to form a double-wall structure.

[0070] The coating device 5 is used to spray and smooth the plate in the height direction, and the construction efficiency is much higher than that of traditional spraying.

[0071] Furthermore, the present invention is described in detail above in conjunction with the embodiments of the accompanying drawings, and a person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the present invention shall be protected by the scope defined by the attached claims.

Claims

1. A double-wall sandwich insulation board, comprising a supporting keel, an insulation board, a structural net and a concrete covering, wherein a plurality of the supporting keels are arranged side by side with spacing, the insulation board is located between adjacent supporting keels, the structural net is laid on both sides of the supporting keels and the insulation board arranged side by side, and the concrete covering is coated on the structural net; characterized in that: At least two rows of through holes and two rows of positioning pieces are provided on the supporting keel, and the two rows of through holes and the two rows of positioning pieces are respectively located on both sides of the insulation board, and the insulation board is positioned and clamped between the two rows of positioning pieces, and the structural net is tied to the supporting keel through the through holes; the positioning pieces are bolted into the concrete covering, and the supporting keel cooperates with the positioning pieces to jointly tie the concrete coverings on both sides to form a double-wall structure.

2. The double-wall sandwich insulation board according to claim 1, characterized in that: The supporting keel is a light steel keel, and the through hole is punched out of the light steel keel facing the insulation board, and the punched area is bent to form the positioning piece; multiple positioning pieces on the light steel keel are arranged at intervals in the height direction, and multiple positioning pieces are bent in sequence facing both sides.

3. The double-wall sandwich insulation board according to claim 2, characterized in that: The positioning member is a positioning plate, the positioning plate is perpendicular to the side plate surface of the insulation board, and the positioning plate is bolted to the concrete covering.

4. The double-wall sandwich insulation board according to claim 1, characterized in that: The structural net is a flat net or a corrugated net.

5. Double wall sandwich insulation board forming system, characterized by: It comprises the double-wall sandwich insulation board and the coating device as described in any one of claims 1 to 4; the concrete covering is formed by coating by the coating device, the coating device comprises a push rod, a spraying pipe and a plastering board, the push rod is supported on the plastering board, the plastering board comprises a plastering plate body and a slurry collecting plate body, the spraying pipe is arranged on the slurry collecting plate body, the spraying pipe sprays slurry in the slurry collecting space between the slurry collecting plate body and the insulation board and is smoothed by the slurry collecting plate body, thereby forming a coating area of ​​the concrete covering.

6. The double-wall sandwich insulation board forming system according to claim 5, characterized in that: The screed plate body and the slurry collecting plate body form a certain angle for receiving the slurry.

7. The double-wall sandwich insulation board forming system according to claim 5, characterized in that: There are multiple spraying pipes, which are evenly arranged along the grouting plate body.

8. The double-wall sandwich insulation board forming system according to claim 5, characterized in that: The push rod is provided with a plurality of supporting feet, some of which are hinged to the trowel plate body; and some of which are supported on the slurry plate body through elastic members.

9. The double-wall sandwich insulation board forming system according to claim 5, characterized in that: The width of the screed plate body and the slurry plate body is not less than the distance between two adjacent supporting keels.

10. A forming method of a double-wall sandwich insulation board forming system as claimed in claims 5 to 9, characterized in that: The following steps are involved: Arrange a plurality of the supporting keels in parallel and at intervals, and pre-form two rows of through holes and two rows of positioning members on the supporting keels; Arrange a heat preservation board between adjacent supporting keels, and position and clamp the heat preservation board between two rows of positioning members; Binding the structural net on both sides of the supporting keel through the through holes; At least the area between two adjacent supporting keels is used as a coating area of ​​the concrete covering, and the coating is sprayed and smoothed in the direction of the plate height by a coating device, and is coated and smoothed side by side in sequence.

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