Building Panel Coupling System with Integrated Water Discharge Channels
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Solution Overview
Problem
Existing building panels used for roofing are prone to water leakage when positioned non-vertically due to exposure of coupling edges, requiring labor-intensive sealing under favorable weather conditions, which is inefficient and time-consuming.
Innovation Solution
A coupling system for sandwich building panels that incorporates water discharge channels and compressible seals to manage water ingress, with bent sheet edges shielding thermal bridges and enhancing clamping fit, allowing efficient water management and hiding fasteners for a smooth roof appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If building panels are used for roofing with horizontal or inclined coupling edges, then the panels can be used for non-vertical positioning, but water leakage occurs at the exposed coupling edges
Solution Approach 1:
The coupling edge is segmented into multiple functional zones: an upper sealing region with overlapping flanges and seals, and a lower water discharge region with channels. This segmentation allows the coupling edge to simultaneously handle both sealing and water management functions, resolving the contradiction between adaptability for non-vertical positioning and prevention of water leakage.
Solution Approach 2:
A water discharge channel acts as an intermediary element between the sealed upper region and the external environment. This channel provides a controlled pathway for water that penetrates the seal, directing it to a discharge point away from the panel interface, thus preventing uncontrolled leakage while maintaining the adaptability of the coupling system.
2Object-affected harmful factors
If seals are applied along the full length of the joint to prevent water leakage, then water tightness is improved, but the sealing process becomes labor-intensive and requires favorable weather conditions
Solution Approach 1:
The sealing elements and water discharge channels are pre-integrated into the panel coupling edges during manufacturing. This preliminary action eliminates the need for on-site sealing applications, allowing panels to be quickly assembled in any weather conditions without labor-intensive sealing operations, thus improving productivity while maintaining water tightness.
Solution Approach 2:
The coupling system is designed to be self-sealing and self-draining. The overlapping flanges and integrated seals automatically prevent water ingress, while the water discharge channels automatically convey any penetrating water to discharge points. This self-service mechanism eliminates the need for manual sealing operations, significantly improving installation efficiency.
3Object-affected harmful factors
If water discharge channels are provided to discharge seeping water, then water management is improved, but the coupling edge structure becomes more complex
Solution Approach 1:
The water discharge channels are merged with the coupling edge structure itself rather than being separate components. The channels are formed as integral features of the coupling edges, combining the structural function of the coupling edge with the water management function of the discharge channel, thus improving water discharge capability without significantly increasing structural complexity.
4Object-affected harmful factors
If cover sheet edges are bent and pierced into insulating material to shield sharp edges and avoid thermal bridges, then safety and thermal performance are improved, but the coupling edge geometry becomes more complex
Solution Approach 1:
The cover sheet edges are bent into curved configurations that pierce the insulating material. This curvature serves multiple functions: it shields sharp edges for safety, creates thermal breaks by disrupting direct thermal paths through the metal edges, and provides the necessary geometry for forming the coupling projections and recesses. The curved geometry integrates multiple functions while managing the complexity of the edge structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively prevents water leakage by directing seepage into discharge channels and using seals, while maintaining a seamless appearance and reducing thermal bridges, thus improving installation efficiency and durability.
Implementation Method 1
one or more compressible seals between the coupling edges at a position between the water discharge channel and the outer cover sheets
Implementation Method 2
the cover sheets have bent sheet edges piercing into the insulating material. This way, sharp edges of the sheets are shielded by the insulating material. It also serves to avoid any thermal bridges between the inner and outer cover sheets
Implementation Method 3
When mounted, building panels of roofing structure are typically inclined and mounted side by side, so the coupled edges are also inclined. Hence, water collected in the water discharge channel flows down to an open lower end of the discharge channel
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Coupling system (3, 30) for coupling building panels (1, 2; 31, 32) or sandwich panel comprising two cover sheets (5, 6; 33, 34, 36, 37) and a core (4, 39) of insulating material sandwiched between the two cover sheets, in particular for building a roof structure. The building panels have matching coupling edges (7, 8; 40, 41), profiled to define one or more water discharge channels (19; 59, 64) running substantially parallel to the coupling edges.