Fireproof Door Leaf Reinforcement Profile Design
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Solution Overview
Problem
Existing fire protection doors face challenges in withstanding high bending stresses and mechanical stresses during fires while maintaining low production costs, with previous solutions either being expensive or heavy due to the use of thick reinforcement profiles and complex manufacturing processes.
Innovation Solution
A fire door design featuring thin-walled reinforcement profiles with a U-shape, arranged at a distance from the door leaf box end faces, interacting with insulating bodies and stabilizing elements to prevent deformation and movement, thereby enhancing stability without increasing weight or production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thick reinforcement profiles are used to withstand high bending stresses during fires, then the stability and strength of the fire door are improved, but the weight and production costs increase
Solution Approach 1:
The reinforcement profile is designed with non-uniform wall thickness, where the web portion has a first wall thickness and the flange portions have a second wall thickness that is different from the first. This local variation in quality allows the structure to achieve necessary strength at critical locations while reducing material usage and weight in less critical areas, thereby resolving the contradiction between overall strength and weight reduction.
2Strength
If thick reinforcement profiles are used to withstand high bending stresses during fires, then the stability and strength of the fire door are improved, but the production costs increase
Solution Approach 1:
The reinforcement profile employs varying wall thicknesses in different sections (web vs. flange), which allows for optimized material distribution. This reduces the total amount of material required compared to uniform thick profiles, thereby lowering production costs while maintaining necessary strength. The design achieves cost-effectiveness without compromising structural integrity.
3Strength
If complex manufacturing processes are used to create thick reinforcement profiles, then the strength and stability are improved, but the production effort and complexity increase
Solution Approach 1:
The reinforcement profile is designed with distinct geometric features (web and flange portions with different wall thicknesses) that can be manufactured using standard forming processes. The design avoids the need for complex multi-step manufacturing procedures by incorporating the varying thickness requirements directly into the profile geometry, thereby reducing manufacturing process complexity while achieving the necessary strength characteristics.
4Ease of manufacture
If thin-walled reinforcement profiles are used to reduce weight and cost, then the production costs and weight are reduced, but the stability and resistance to deformation under thermal stress deteriorate
Solution Approach 1:
The reinforcement profile uses thin-walled construction in the flange portions while maintaining adequate wall thickness in the web portion. This localized quality distribution allows the profile to be lightweight and cost-effective overall, while the thicker web section provides necessary structural stability and resistance to deformation under thermal stress. The design achieves cost reduction without compromising critical stability properties.
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 design achieves sufficient stability under high thermal stress using thin-walled reinforcement profiles, preventing buckling and deformation, and maintaining a lightweight, cost-effective construction while effectively dissipating heat and maintaining structural integrity during fires.
Implementation Method 1
at least one insulating body is arranged on the two cover plates, with the sides of the two cover plates facing the interior of the door leaf box being insulated by means of the at least one insulating body
Implementation Method 2
at least one stabilizing element in the form of a stud is arranged between the cover plates of the door leaf along lateral, vertically running end faces of the door leaf box
Data Source
AI summary
The door panel has cover plates whose interior is provided with insulating element. A stabilizing element (5) is arranged in the form of a lug between the cover plates. A reinforcing profile (9) is provided between the cover plates. The reinforcing profile is provided with a planar profile portion which is arranged parallelly with respect to the cover plates. The movement and/or deformation of planar profile portion of reinforcing profile is blocked with respect to the stabilizing element in a direction perpendicular to the exposed surface of door panel.