Adjustable Window Drain Screen for Debris Flow Capacity
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Solution Overview
Problem
Existing drainage systems face challenges in effectively screening out larger debris while maintaining hydraulic capacity and minimizing maintenance, with known devices requiring frequent cleaning or clogging, and being inflexible in size and material, leading to inefficiencies and installation difficulties.
Innovation Solution
A drainage apparatus comprising a sheet metal structure with adjustable fastening and drainage openings designed to accommodate various window sizes, featuring elongated slots and larger rectangular or parallelogram openings to screen out debris, facilitating easy installation and debris removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed screens with small openings are used to block debris, then debris screening effectiveness is improved, but hydraulic capacity is reduced and clogging occurs
Solution Approach 1:
The screen structure uses varying bar spacing with larger openings (2-4 inches) in high-flow areas to maintain hydraulic capacity while smaller openings in specific zones target specific debris sizes. This localized differentiation resolves the contradiction by optimizing both screening effectiveness and water flow in different regions of the same screen.
Solution Approach 2:
The screen is designed with retractable or removable components that can dynamically adjust opening size based on flow conditions and debris accumulation. During high-flow events, larger openings remain open to maintain hydraulic capacity, while during low-flow periods, the screen can be adjusted to provide more aggressive debris screening.
2Shape
If screens are made flush with the window face for aesthetic purposes, then appearance is improved, but installation becomes cumbersome and adaptability to different window sizes is reduced
Solution Approach 1:
The screen system is divided into modular segments that can be independently installed and adjusted. Each module can be customized to fit different window dimensions, and the segmented design allows for easier handling and installation compared to a single large flush-mounted screen, while still achieving the desired aesthetic appearance when properly assembled.
3Productivity
If bar spacing is increased to reduce clogging, then maintenance needs are reduced, but debris screening effectiveness is worsened
Solution Approach 1:
Different bar spacing configurations are applied in different sections of the screen based on local debris characteristics and flow conditions. Areas with larger debris require larger spacing, while areas with finer debris use smaller spacing, optimizing both maintenance requirements and screening effectiveness for each specific location.
4Duration of action of stationary object
If screens are made from traditional materials like stainless steel or aluminum, then durability is improved, but adaptability to different window sizes and retrofitting becomes difficult
Solution Approach 1:
The screen system incorporates universal mounting mechanisms and standardized connection points that allow the same basic screen design to be adapted to various window sizes and configurations. This multi-functional approach maintains durability through robust material construction while enabling easy retrofitting and customization for different applications.
Data Source
AI summary
A drainage apparatus adapted to extend over a window for drainage. The drainage apparatus is comprised of at least one piece of sheet metal, which defines a first end portion and a second end portion that are, respectively, adapted to extend over a face of a window for drainage. Each end portion defines at least one elongated opening configured for receiving a fastener adapted to secure the drainage apparatus, respectively, over different sizes of windows for drainage. A middle portion is defined between the first end portion and the second end portion, wherein the middle portion defines a plurality of drainage openings that, respectively, have a dimension of at least two inches to perform the screening function.