Fireproof Door Lattice Design for Thermal Deformation
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Solution Overview
Problem
Conventional fireproof doors deform under high temperatures, leading to gaps that compromise their hermetic characteristics and allow air, heat, and smoke to escape, as the metal sheet expands while the unaffected side remains unchanged, disrupting the fire barrier.
Innovation Solution
A fireproof door design featuring a single metal sheet within a perimetric frame, reinforced with a lattice construction of rectangular tray-shaped profiles and vertical ribbons, filled with thermo-insulating material, which provides resistance to thermal and mechanical deformations by protecting the metal sheet with a thermo-insulating layer and enhancing mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard fireproof door with two peripheral metal sheets and thermo-insulation is used, then fire resistance is provided, but the door deforms under high temperature causing gaps that compromise hermetic characteristics
Solution Approach 1:
The door leaf is divided into multiple sections by introducing a lattice construction with tray-shaped profiles and vertical ribbons. This segmentation creates multiple small chambers filled with thermo-insulating material, distributing the thermal stress and preventing overall warping of the door leaf while maintaining fire resistance.
Solution Approach 2:
The door combines metal sheets with thermo-insulating materials in a composite structure. The metal provides structural framework and fire resistance, while the thermo-insulating material (packed in chambers formed by the lattice construction) protects the metal from excessive heating and thermal expansion, preventing deformation.
2Temperature
If metal sheet of the door leaf is heated, then fire resistance is achieved, but the metal expands causing warping and gaps
Solution Approach 1:
Thermo-insulating material is packed in advance into the chambers formed by the lattice construction, creating a protective buffer before fire exposure. This pre-positioned insulation cushioning protects the metal sheet from sudden and excessive thermal expansion during fire, maintaining structural stability.
3Strength
If a lattice construction with tray-shaped profiles and vertical ribbons is added, then mechanical strength and thermal resistance are improved, but device complexity increases
Solution Approach 1:
The lattice construction segments the door leaf into multiple manageable chambers using standardized tray-shaped profiles and vertical ribbons. This segmentation approach, while adding structural complexity, creates a modular system that can be systematically assembled and maintained, with each segment independently contributing to overall strength and thermal resistance.
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 door maintains its geometric integrity and hermetic seal during a fire, preventing air, heat, and smoke from passing through, while reducing manufacturing costs without compromising fire protection or mechanical characteristics.
Implementation Method 1
fire flames coming from any side of the door first encounter with a protective thermo-insulating layer which protects constructional metal sheet being beyond the insulation from excessive heating
Data Source
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AI summary
The present invention relates to a fireproof door the purpose of which is to separate one room from the next one and to stand a particular minimal temperature for a certain period of time whereas the shape and measurements of the door remain unchanged. The door of the present invention consists of a single metal sheet installed within the perimetric door frame. Additionally, the door is reinforced by a lattice construction consisting of plurality of rectangular tray-shaped profiles arranged horizontally and gradually over each other and fixed symmetrically to a metal sheet on both sides thereof, the profiles being linked up by several vertical metal ribbons which are connected to an upper and lower door frame rails and to each tray-shaped profile. The chambers formed on both sides of the sheet between the sheet, trays and ribbons are packed with thermo-insulation.