Fire-Prevention Sleeve with Back-Bent Flaps for Ceiling Passages
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Solution Overview
Problem
Existing fire-prevention solutions for ceiling passages face challenges such as delayed reaction of intumescent materials due to insulation properties of permanent formwork and require extensive assembly space, leading to instability and increased costs.
Innovation Solution
A fire-prevention sleeve with a rectangular strip design featuring notches along one longitudinal side to form flaps that bend backwards, creating a pocket for insulation material, allowing for top-down installation and quick reaction of intumescent additives, and optionally incorporating a carrier belt for stability and elasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If permanent formwork (mineral wool or construction foam) is used to seal ceiling passages, then fire-prevention sealing is achieved, but the insulation properties delay the reaction of intumescent materials and require extensive assembly space
Solution Approach 1:
The fire-prevention system is divided into two functional layers: an outer permanent formwork layer for sealing and structural support, and an inner fire-prevention sleeve with intumescent material for rapid fire response. This segmentation allows each layer to perform its specific function optimally without interfering with the other, resolving the contradiction between sealing reliability and reaction speed.
Solution Approach 2:
The fire-prevention sleeve acts as an intermediary element between the pipe and the permanent formwork. It provides a thermal bridge that allows heat to reach the intumescent material quickly while the permanent formwork maintains the seal. The sleeve's design with flaps creates assembly space without requiring extensive ceiling passage modification.
2Reliability
If permanent formwork is used to seal ceiling passages, then fire-prevention sealing is achieved, but extensive assembly space is required leading to instability and increased costs
Solution Approach 1:
The fire-prevention sleeve incorporates flexible flaps that can adapt to varying ceiling passage dimensions and pipe positions. These flaps are designed to bend and conform to the available space, eliminating the need for extensive stable assembly space. The dynamic design allows the system to function effectively in constrained spaces while maintaining sealing reliability.
Solution Approach 2:
The sleeve is constructed as a flexible structure with flaps that can bend and adapt to the available assembly space. This flexible design eliminates the need for rigid, space-intensive formwork systems while maintaining the fire-prevention sealing function. The thin-film nature of the sleeve allows it to be installed in tight spaces without compromising stability.
3Ease of operation
If fire-prevention additives are embedded in a rectangular strip with notches forming flaps, then top-down installation is enabled and quick reaction is achieved, but the structure becomes more complex
Solution Approach 1:
The rectangular strip is segmented with notches that form separate flaps. This segmentation serves dual purposes: it creates the flexible structure needed for top-down installation while also providing the expansion space necessary for quick intumescent reaction. The segmented design allows the flaps to bend and conform during installation without requiring complex assembly procedures.
Solution Approach 2:
The installation features (notches and flaps) are merged with the fire-prevention functional elements (intumescent material positioning). The same structural features that enable top-down installation also create the pockets and spaces needed for rapid heat response. This merging eliminates the need for separate complex structural additions.
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 solution provides a cost-effective, flexible, and efficient fire-prevention system that ensures quick reaction of intumescent materials and reduces assembly expenses by eliminating the need for additional formwork, while maintaining mechanical stability and soundproofing capabilities.
Implementation Method 1
quick reaction of intumescent materials
Data Source
AI summary
In a ceiling passage with an opening through which a pipe extends in the vertical direction, the pipe being surrounded by a fire-prevention sleeve, the fire-prevention sleeve includes, for example, fire-prevention additives embodied in a rectangular strip. A plurality of notches are provided along only one longitudinal side of the rectangular strip. The plurality of notches are used to form flaps at a bottom edge of the rectangular strip and are bent backwards. The flaps are supported at an inner wall of the ceiling passage near a bottom of the ceiling passage.