Pressure-Activated Drain Valve for Building Cladding Film Layers
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Solution Overview
Problem
Existing building cladding systems with film layers face challenges in securely draining rainwater, particularly when the film layer collapses, leading to water accumulation and potential damage due to increased weight and extensibility, which existing solutions like inclined orientations, increased tension, monitoring systems, and drainage hoses do not adequately address.
Innovation Solution
A device with a pivotable valve element in the film layer that automatically opens when the water pressure exceeds a threshold, allowing drainage and then closes once the water is drained, ensuring reliable and efficient liquid removal, even in collapsed states, and can be used in both single-layer and multi-layer film systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the film layer is arranged in an inclined orientation to enable water drainage, then water drainage is improved, but the adaptability to different structural situations is reduced
Solution Approach 1:
The film layer is designed to change its orientation dynamically - remaining horizontal during normal operation but automatically tilting when water accumulates and collapses occur, enabling drainage only when needed without compromising structural adaptability
Solution Approach 2:
The system changes the orientation parameter of the film layer from a fixed inclined state to a variable state that transitions between horizontal and tilted positions based on water accumulation conditions, resolving the contradiction between drainage effectiveness and structural adaptability
2Stability of the object's composition
If the film layer is placed under greater tension or uses films with lower extension behavior to prevent collapse, then structural stability is improved, but reliable drainage in collapsed scenarios cannot be ensured
Solution Approach 1:
The drainage channels and valve elements are pre-installed and positioned within the film layer during manufacturing, so that when collapse occurs, the drainage infrastructure is already in place and functional, ensuring immediate drainage capability without requiring additional structural reinforcement
Solution Approach 2:
The film layer is divided into functional segments including water collection zones, drainage channels, and valve elements that operate independently - allowing the film to maintain structural integrity under tension while ensuring drainage functionality even when portions collapse
3Difficulty of detecting and measuring
If monitoring systems are used to detect pressure loss and generate alarm signals, then fault detection capability is improved, but the risk of system failure remains and indirect measures do not directly remove rainwater
Solution Approach 1:
The film layer incorporates self-draining functionality through integrated valves and channels that automatically activate when water accumulates and collapse occurs, enabling the system to remove rainwater directly without relying on external monitoring systems or manual intervention
Solution Approach 2:
Pressure-sensitive valve elements act as intermediaries between the collapsed film structure and the drainage function - these valves automatically open in response to pressure changes from water accumulation, providing a direct mechanical link that eliminates the need for electronic monitoring systems
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 device ensures secure, efficient drainage of rainwater, enhances failure safety, reduces manufacturing and maintenance costs, and allows for quick liquid removal with high flow rates, effectively preventing film layer damage from water accumulation.
Implementation Method 1
the pressure, which acts on the first valve element, of a liquid which has come onto the upper side of the first film layer exceeds the first threshold value
Implementation Method 2
first valve element which can be arranged in the region of a first opening, which is provided in the first film layer, in such a way that it is pivotable
Implementation Method 3
first opening and closing means which can be mounted on the first film layer and which are designed to hold the first valve element in the first position as long as the pressure, which acts on the first valve element, of a liquid is less than a predetermined first threshold value
Data Source
AI summary
A device for draining a liquid from a first film layer which forms at least one part of a building cladding element. A first valve element can be arranged in the region of a first opening of the first film layer such that the valve element can be pivoted between a first position, which closes the first opening, and a second position, which at least partly releases the first opening. Additionally, a first opening and closing are configured to keep the first valve element in the first position if pressure of a liquid is less than or equal to a threshold, allow the first valve element to pivot from the first position to the second position if the pressure of the liquid exceeds the threshold, and pivot the first valve element from the second position to the first position if the pressure is substantially no longer present.