Firestop Collar Structure for Large Opening Stability
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Solution Overview
Problem
Conventional firestop collars are unsuitable for large opening cross sections as they become unstable and the ash crust can fall out, leading to poor fire-protection properties.
Innovation Solution
A firestop collar design featuring an intumescent inlay between the block and frame, with a reinforcing inlay and a modular frame, allows for the expansion of the intumescent material to maintain stability and effectively seal larger openings by using intumescent materials with varying activation temperatures and expansion behaviors, and a foamable block for enhanced sound absorption and smoke imperviousness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional firestop collars are used for large opening cross sections, then the firestop collar can seal the opening, but the fire-protection element becomes unstable and the ash crust falls out
Solution Approach 1:
The patent uses a composite structure consisting of a frame, intumescent material, and reinforcing inlay made of different materials (metal, glass fibers, basalt fibers, carbon fibers, or ceramic fibers). This composite construction provides both the necessary stability for large openings and the intumescent properties for fire protection, resolving the contradiction between sealing large areas and maintaining structural stability.
Solution Approach 2:
The reinforcing inlay is strategically positioned within the intumescent material to provide localized structural support where needed. This allows the firestop collar to maintain stability across large opening cross sections while preserving the intumescent expansion properties of the material in other areas.
2Area of stationary object
If the firestop collar is designed for large opening cross sections, then it can seal larger openings, but the ash crust becomes unstable and falls out
Solution Approach 1:
The combination of frame, intumescent material, and reinforcing inlay creates a composite structure that maintains reliability for fire protection in large openings. The reinforcing inlay specifically prevents ash crust failure, ensuring that the fire-protection properties remain reliable even for openings up to 150 mm×750 mm.
Solution Approach 2:
The reinforcing inlay is embedded within the intumescent material to provide localized structural support, ensuring that the ash crust remains stable and reliable during fire conditions while allowing the overall structure to accommodate large opening cross sections.
3Reliability
If a reinforcing inlay is added to stabilize the ash crust, then the fire-protection properties improve, but the device complexity increases
Solution Approach 1:
The reinforcing inlay is integrated into the intumescent material as part of a composite structure, where multiple materials work together to provide both stability and fire-protection properties. This integration approach improves reliability while managing device complexity through functional consolidation.
Solution Approach 2:
The reinforcing inlay is strategically positioned only where structural support is needed within the intumescent material, providing localized stabilization of the ash crust. This targeted approach improves fire-protection reliability while minimizing the increase in device complexity by adding reinforcement only where necessary.
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 enables reliable fire protection for larger opening sizes, preventing the ash crust from falling out and maintaining stability, thus enhancing fire-protection properties for openings up to 150 mm×750 mm, while also providing sound absorption and efficient material usage.
Implementation Method 1
The firestop collars usually contain an intumescent material, which is disposed around the lines... In the event of fire, the heat causes the intumescent inlay to be activated and to expand.
Data Source
AI summary
A firestop collar (10) for sealing of openings, especially of line penetrations (12), that pass through walls (11) or ceilings has a frame (16) and a block (20) of optionally intumescent material disposed therein, and is characterized in that an intumescent inlay (22) is disposed between the block (20) and the frame (16).