A fire-retardant sandwich insulation composite wall panel

Abstract

This invention provides a flame-retardant sandwich insulated composite wall panel, comprising A-type stainless steel truss reinforcement and, from the inside out, an inner leaf concrete layer, a cavity layer, and an outer leaf insulated concrete layer. The cavity layer is located between the inner leaf concrete layer and the outer leaf insulated concrete layer, and is made of cast-in-place concrete. This solution fully utilizes the advantages of composite components by prefabricating the vertical components of prefabricated buildings, reducing their own weight, and placing the insulation layer inside the wall panel. This reduces the need for subsequent insulation layer construction, shortens the construction period, and meets the green and low-carbon requirements of low-energy buildings. Furthermore, the fire-resistant Class A material placed around the outer ring of the wall panel's insulation layer enables each prefabricated component to form its own fire barrier, enhancing the fire resistance of the building's exterior wall insulation.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a flame-retardant sandwich insulation composite wall panel. Background Technology

[0002] With the vigorous promotion of prefabricated buildings and the introduction of ultra-low energy consumption building concepts in recent years, the design and development of prefabricated building components, the detailed design of components, the production and practical application of components have all developed rapidly.

[0003] However, currently, most prefabricated composite wall panels are made of ordinary concrete, which have relatively simple functions. Moreover, they do not reflect the advantages of optimized functions of prefabricated components for subsequent building exterior wall insulation construction. The subsequent construction of the insulation layer will significantly prolong the construction period and increase construction costs. Furthermore, the safety of some subsequent constructions that cover the building with insulation layers is poor. In the event of fire or other adverse environmental conditions, the insulation layer in the wall panel may fall off, endangering people's health and safety. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a flame-retardant sandwich insulation composite wall panel, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a flame-retardant sandwich insulated composite wall panel, comprising A-type stainless steel truss reinforcement and, from the inside out, an inner leaf concrete layer, a cavity layer, and an outer leaf insulated concrete layer, wherein the cavity layer is disposed between the inner leaf concrete layer and the outer leaf insulated concrete layer, the cavity layer being made of cast-in-place concrete; the A-type stainless steel truss reinforcement is used to fix the inner leaf concrete layer, the cavity layer, and the outer leaf insulated concrete layer and to fix them to structural beams and columns by means of pre-reserved steel reinforcement anchoring; the outer leaf insulated concrete layer is used for heat insulation and flame-retardant protection of the wall.

[0006] Preferably, the outer leaf-type thermal insulation concrete layer includes an outer wall insulation layer and an outer leaf concrete layer. The outer wall insulation layer is disposed on the side of the cavity layer away from the inner leaf concrete layer, and the outer leaf concrete layer wraps around the outside of the outer wall insulation layer.

[0007] Preferably, the outer leaf concrete layer has a thickness of 50mm, the outer wall insulation layer has a thickness of 20mm (Class A fireproof insulation board), and the distance between the side of the outer wall insulation layer and the side of the outer leaf concrete layer is 20cm (Class A fireproof insulation board).

[0008] Preferably, the external wall insulation layer includes a Class A fireproof insulation board, an XPS insulation board, and connectors. The XPS insulation board is disposed on the outside of the cavity layer and is used to improve the insulation performance of the composite wall panel within the building. The Class A fireproof insulation board is wrapped around the outside of the XPS insulation board and is used to provide fireproof partitioning for the interior space of the building. The connectors are fixedly installed between the Class A fireproof insulation board and the XPS insulation board and are used to assemble the Class A fireproof insulation board and the XPS insulation board.

[0009] Preferably, the connector includes several sets of supporting connectors and insulation nails. The supporting connectors are located at the perimeter of the XPS insulation board and the Class A fireproof insulation board. Each supporting connector consists of an adapter part and an inclined part. The adapter part is used for installation between the XPS insulation board and the Class A fireproof insulation board. The inclined part is used to balance the shear stress generated by the XPS insulation board. The insulation nail is located at the center of the XPS insulation board and is used to assemble the XPS insulation board simultaneously with the supporting connectors.

[0010] Preferably, the thickness of the outer leaf concrete layer is 50 mm.

[0011] Preferably, the gap at the connection between the A-type stainless steel truss reinforcement and the XPS insulation board is filled with polyurethane foam.

[0012] This invention provides a flame-retardant sandwich insulation composite wall panel. It has the following beneficial effects:

[0013] 1. This solution fully leverages the advantages of composite components by prefabricating vertical components in prefabricated buildings, reducing their weight, and placing the insulation layer inside the wall panels. This reduces the need for subsequent insulation layer construction, shortens the construction period, and meets the green and low-carbon requirements of low-energy buildings. Furthermore, the fire-resistant Class A material placed on the outer ring of the wall panel insulation layer enables each prefabricated component to form its own fire barrier, thereby enhancing the fire resistance of the building's exterior wall insulation.

[0014] 2. This solution facilitates on-site installation and transportation of components by using hollow cavity layers, and enables the assembly line production of prefabricated components.

[0015] 3. This solution reduces the shear stress on the insulation nails caused by the weight of the XPS insulation board by using support connectors in conjunction with insulation nails. This extends the service life of the insulation nails after the outer concrete layer falls off under adverse usage conditions, thus improving the safety of Class A fireproof insulation boards and XPS insulation boards during use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the main structure of the external wall insulation layer in this invention.

[0018] Figure 3 This is a cross-sectional view of the external wall insulation layer in this invention.

[0019] Marked in the image:

[0020] 11A type stainless steel truss reinforcement; 12 inner leaf concrete layer; 13 cavity layer; 14 external wall insulation layer; 15 outer leaf concrete layer; 20A grade fireproof insulation board; 21 XPS insulation board; 22 support connectors. Detailed Implementation

[0021] This invention provides a flame-retardant sandwich insulation composite wall panel, such as... Figure 1-3 As shown, the composite wall panel includes an A-type stainless steel truss steel bar 11 and an inner leaf concrete layer 12, a cavity layer 13, and an outer leaf with thermal insulation concrete layer arranged sequentially from the inside to the outside, thereby making the overall thickness of the composite wall panel 250mm or more. The cavity layer 13 is located between the inner leaf concrete layer 12 and the outer leaf with thermal insulation concrete layer. The cavity layer 13 is made of cast-in-place concrete. The A-type stainless steel truss steel bar 11 is used to fix the inner leaf concrete layer 12, the cavity layer 13, and the outer leaf with thermal insulation concrete layer and fixes them to the structural beams and columns by means of pre-reserved steel bar anchoring. The outer leaf with thermal insulation concrete layer is used for thermal insulation and flame retardant protection of the wall.

[0022] The outer leaf insulated concrete layer includes an outer wall insulation layer 14 and an outer leaf concrete layer 15. The outer wall insulation layer 14 is located on the side of the cavity layer 13 away from the inner leaf concrete layer 12, and the outer leaf concrete layer 15 is wrapped around the outer side of the outer wall insulation layer 14.

[0023] The outer concrete layer 15 is 50mm thick, the outer wall insulation layer 14 is at least 20mm thick (equivalent to a Class A fireproof insulation board), and the distance between the side of the outer wall insulation layer 14 and the side of the outer concrete layer 15 is 20cm (equivalent to a Class A fireproof insulation board).

[0024] like Figure 3As shown, the external wall insulation layer 14 includes a Class A fireproof insulation board 20, an XPS insulation board 21, and connectors. The XPS insulation board 21 is located on the outside of the cavity layer 13 and is used to improve the insulation performance of the composite wall panel inside the building. The Class A fireproof insulation board 20 is wrapped around the outside of the XPS insulation board 21 and is used to provide fireproof partition for the interior space of the building. The connectors are fixedly installed between the Class A fireproof insulation board 20 and the XPS insulation board 21 and are used to assemble the Class A fireproof insulation board 20 and the XPS insulation board 21.

[0025] like Figure 2 As shown, the connector includes several sets of support connectors 22 and insulation nails. The support connectors 22 are located at the four-sided connection points of the XPS insulation board 21 and the Class A fireproof insulation board 20. The support connectors 22 consist of an adapter part and an inclined part. The adapter part of the support connectors 22 is used for installation between the XPS insulation board 21 and the Class A fireproof insulation board 20. The inclined part of the support connectors 22 is used to balance the shear stress generated by the XPS insulation board 21. The insulation nails are located at the center of the XPS insulation board 21. The insulation nails are used to assemble the XPS insulation board 21 simultaneously with the support connectors 22 to increase the stability of the composite wall panel.

[0026] The thickness of the outer concrete layer is 50mm.

[0027] The gap between the A-type stainless steel truss steel bar 11 and the XPS insulation board 21 is filled with polyurethane foam to prevent the formation of thermal bridges caused by the grout filling the gap after the concrete is poured.

[0028] First, the workers set up and positioned the mold according to the drawings, then placed and tied the outer leaf wall reinforcement for pouring the outer leaf concrete layer 15. After the outer leaf concrete layer 15 was poured, the insulation material was laid. Then, according to the material distribution of Class A fireproof insulation board 20 and XPS insulation board 21, the installation positions of the support connectors 22 and insulation nails were arranged. After fixing, curing was carried out. After the outer leaf wall was cured, the inner leaf concrete layer 12 was assembled and the wall reinforcement was tied. Then, the inner leaf concrete layer 12 and the outer leaf concrete layer 15 were poured and stacked together using a turning table to form an integral composite wall panel. Curing was carried out again. Finally, the mold was demolded and stacked for natural curing, thus completing the production.

[0029] After the composite wall panels are installed and fixed, the workers tie, embed, and seal the reinforcing bars of the cast-in-place section. Then, they pour concrete into the cavity layer 13 and the cast-in-place structure inside the composite wall panels. Finally, after the curing period meets the specifications, the formwork is removed, and the overall structure is completed.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flame-retardant sandwich insulated composite wall panel, characterized in that: It includes A-type stainless steel truss steel bars (11) and an inner leaf concrete layer (12), a cavity layer (13) and an outer leaf with thermal insulation concrete layer arranged sequentially from the inside to the outside. The cavity layer (13) is located between the inner leaf concrete layer (12) and the outer leaf with thermal insulation concrete layer. The cavity layer (13) is made of cast-in-place concrete. The A-type stainless steel truss steel bars (11) are used to fix the inner leaf concrete layer (12), the cavity layer (13) and the outer leaf with thermal insulation concrete layer and fix them to the structural beams and columns by means of anchoring with reserved steel bars. The outer leaf with thermal insulation concrete layer is used to insulate the wall and provide flame retardant protection. The outer leaf insulated concrete layer includes an outer wall insulation layer (14) and an outer leaf concrete layer (15). The outer wall insulation layer (14) is disposed on the side of the cavity layer (13) away from the inner leaf concrete layer (12), and the outer leaf concrete layer (15) is wrapped around the outside of the outer wall insulation layer (14). The outer leaf concrete layer (15) is 50mm thick, the outer wall insulation layer (14) is 20mm thick, and the distance between the side of the outer wall insulation layer (14) and the side of the outer leaf concrete layer (15) is 20cm. The external wall insulation layer (14) includes a Class A fireproof insulation board (20), an XPS insulation board (21), and connectors. The XPS insulation board (21) is located on the outside of the cavity layer (13). The XPS insulation board (21) is used to improve the insulation performance of the composite wall panel inside the building. The Class A fireproof insulation board (20) is wrapped around the outside of the XPS insulation board (21). The Class A fireproof insulation board (20) is used to make the composite wall panel fireproof to the interior space of the building. The connectors are fixedly installed between the Class A fireproof insulation board (20) and the XPS insulation board (21). The connectors are used to assemble the Class A fireproof insulation board (20) and the XPS insulation board (21). The connector includes several sets of support connectors (22) and insulation nails. The support connectors (22) are located at the connection points around the XPS insulation board (21) and the Class A fireproof insulation board (20). The support connectors (22) consist of an adapter and an inclined part. The adapter of the support connectors (22) is used to install the XPS insulation board (21) and the Class A fireproof insulation board (20). The inclined part of the support connectors (22) is used to balance the shear stress generated by the XPS insulation board (21). The insulation nails are located at the center of the XPS insulation board (21). The insulation nails are used to assemble the XPS insulation board (21) together with the support connectors (22).

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