Composite outer wall
By adopting a multi-stage thermal break design with FRP connectors and integrated installation of light steel keel, the problems of thermal bridging effect, durability and construction complexity of composite exterior walls in existing technologies are solved, realizing efficient and economical composite exterior wall construction, which is suitable for ultra-low energy consumption buildings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA CONSTR EIGHT ENG DIV CORP LTD
- Filing Date
- 2025-04-17
- Publication Date
- 2026-05-05
AI Technical Summary
Existing prefabricated composite exterior wall connectors for buildings suffer from significant thermal bridging effects, poor durability, poor stiffness, and complex construction, making them particularly unsuitable for ultra-low energy consumption and near-zero energy consumption buildings.
The design adopts FRP connectors, including main FRP components and secondary FRP components, to form a multi-level thermal break bridge structure. Combined with the integrated installation of light steel keel, dry connection is used instead of wet connection to avoid the pouring and curing process of interior surface.
It significantly reduces thermal bridging, improves durability and stiffness, reduces construction steps, lowers total life cycle costs, and is suitable for ultra-low energy buildings.
Smart Images
Figure CN224200078U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of exterior wall technology, specifically a composite exterior wall. Background Technology
[0002] In prefabricated composite exterior wall insulation systems, connectors are key components that connect and fix the exterior finish, insulation layer, and interior finish. Currently, the most widely used connectors are mainly made of metal (such as stainless steel and aluminum alloy) or FRP (fiberglass reinforced plastic), and employ a wet connection method. This involves casting the connector and the cement-based material of the interior and exterior finishes in the factory, and then connecting them after the cement-based material has cured and set.
[0003] For example, precast concrete sandwich insulated exterior wall panels generally include an inner concrete leaf panel (e.g., 200mm thick), an insulation layer (e.g., 100mm thick XPS board), an outer concrete leaf panel (e.g., 60mm thick), and a connector system. The connectors are mainly divided into stainless steel connectors and FRP connectors. Stainless steel connectors mainly include truss-type, sheet-type, and pin-type connectors, while FRP connectors include rod-shaped FRP connectors and plate-type FRP connectors. The connectors are fixed using a wet connection method where pre-embedded components are followed by concrete pouring. (Ultra) high-performance concrete light steel keel exterior walls form a decorative framework by combining the exterior finish with the light steel keel. When integrating insulation boards and finished interior finishes, the interior finish is generally connected to the light steel keel using long self-tapping screws. However, long self-tapping screws have high thermal conductivity, easily forming thermal bridges, leading to increased building energy consumption. They also exhibit problems such as easy aging, poor rigidity, and easy deformation in complex humid and hot environments, making them unsuitable for ultra-low energy consumption, near-zero energy consumption, and zero energy consumption buildings. Summary of the Invention
[0004] In view of the above-mentioned prior art, this utility model proposes a composite exterior wall that uses thermally broken bridge connectors for connection, which can solve the problems of significant thermal bridging effect, poor durability, poor rigidity and complex construction of factory-prefabricated composite exterior wall connectors.
[0005] The present invention provides a composite exterior wall comprising several FRP connectors, wherein each FRP connector comprises a main FRP component and a secondary FRP component. Both the main FRP component and the secondary FRP component are configured as a groove structure. The first end of the main FRP component is fixedly interlocked with the secondary FRP component, and the web of the secondary FRP component forms the closed end face of the first end of the main FRP component.
[0006] Preferably, the two side flanges of the secondary FRP component are fixedly connected to the two side flanges of the main FRP component by a number of rivets.
[0007] Preferably, it also includes a light steel keel, and the second end wing plate of the main FRP component is fixedly connected to the light steel keel by connecting bolts.
[0008] Preferably, it also includes an outer blade plate, which is cast on the side of the light steel keel away from the secondary FRP component.
[0009] Preferably, it also includes an insulation board, which is mounted on several FRP connectors.
[0010] Preferably, it also includes an interior panel, which is fixedly connected to the web of the secondary FRP component by self-tapping screws.
[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. Excellent thermal insulation performance: The use of multi-stage thermal bridging design (main FRP component + secondary FRP component) and FRP connectors to replace metal connectors can reduce the thermal bridging effect by 70%; 2. Enhanced durability and stiffness: High-performance FRP materials improve durability by 30% and stiffness by more than 90% compared with ordinary metal connectors; 3. Convenient construction: FRP connectors are installed as an integrated unit with light steel keel, eliminating the need for interior surface pouring and curing. The connector installation process is all dry connection, reducing installation steps and making installation convenient, shortening the production cycle by 30%; 4. Economic efficiency: Service life can reach 50 years, and the total life cycle cost is reduced by 40%. Attached Figure Description
[0012] Figure 1 This is a structural schematic diagram of the FRP connector in an embodiment of this utility model.
[0013] Figure 2 This is a schematic diagram of the structure of the light steel keel in the embodiment of this utility model.
[0014] Figure 3 This is a schematic diagram of the composite exterior wall in an embodiment of this utility model.
[0015] In the diagram, 1. Main FRP component; 2. Secondary FRP component; 3. Rivet; 4. Light steel keel; 5. Connecting bolt; 6. Outer leaf plate; 7. Insulation board; 8. Interior panel. Detailed Implementation
[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0017] Example: Figures 1-3The composite exterior wall shown includes several FRP connectors, each including a main FRP component 1 and a secondary FRP component 2. Both the main FRP component 1 and the secondary FRP component 2 are configured as a channel structure. The first end of the main FRP component 1 is fixedly interlocked with the secondary FRP component 2, and the web of the secondary FRP component 2 forms the closed end face of the first end of the main FRP component. The two side flanges of the secondary FRP component 2 are respectively fixedly connected to the two side flanges of the main FRP component 1 by four rivets 3. Thus, the connection between the secondary FRP component 2 and the main FRP component 1 makes the first end of the main FRP component form a panel, which can be connected to the interior panel of the composite exterior wall by self-tapping screws.
[0018] Furthermore, the second end wing plate of the main FRP component 1 is fixedly connected to the light steel keel 4 by connecting bolts 5. Holes are made on the wing plate of the main FRP component 1, and at the same time, two or more holes are made along the length direction at the corresponding positions of the light steel keel 4 for bolt connection, thereby fixing the FRP connector to the light steel keel 4.
[0019] Furthermore, the outer leaf plate 6 is cast on the side of the light steel keel 4 away from the secondary FRP component 2, the insulation board 7 is installed on several FRP connectors, and the interior panel 8 is fixedly connected to the web of the secondary FRP component 2 by self-tapping screws.
[0020] This embodiment adopts a multi-stage thermal break bridge design (main FRP component 1 + secondary FRP component 2) and FRP connectors to replace metal connectors, which significantly reduces the thermal conductivity and improves durability and rigidity. It is integrated with a light steel keel and can integrate finished interior surfaces such as calcium silicate boards, eliminating the need for interior surface pouring and curing processes, improving construction efficiency, and is applicable to insulation materials of various thicknesses, especially ultra-thick insulation materials.
[0021] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent solutions made using the contents of this utility model specification, whether directly or indirectly applied to other related technical fields, are also within the patent protection scope of this utility model.
Claims
1. A composite exterior wall, characterized in that, It includes several FRP connectors, each of which includes a main FRP component and a secondary FRP component. Both the main FRP component and the secondary FRP component are configured as a groove structure. The first end of the main FRP component is fixedly inserted and connected to the secondary FRP component, and the web of the secondary FRP component forms the closed end face of the first end of the main FRP component.
2. The composite exterior wall as described in claim 1, characterized in that, The two side flanges of the secondary FRP component are fixedly connected to the two side flanges of the main FRP component by a number of rivets.
3. The composite exterior wall as described in claim 1 or 2, characterized in that, It also includes a light steel keel, and the second end wing plate of the main FRP component is fixedly connected to the light steel keel by connecting bolts.
4. The composite exterior wall as described in claim 1 or 2, characterized in that, It also includes an outer blade plate, which is cast on the side of the light steel keel away from the secondary FRP component.
5. The composite exterior wall as described in claim 1 or 2, characterized in that, It also includes an insulation board, which is mounted on several FRP connectors.
6. The composite exterior wall as described in claim 1 or 2, characterized in that, It also includes an interior panel, which is fixedly connected to the web of the secondary FRP component by self-tapping screws.