Flexible Mat Jacket for Fire Protection Sleeve
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Solution Overview
Problem
Existing fire protection collars with sheet metal jackets are inflexible and difficult to cut to specific dimensions, making them unsuitable for adapting to narrow bending radii and tight spaces.
Innovation Solution
A flexible mat jacket wrapped around the intumescent strip, providing directional support and allowing easy on-site cutting and adjustment, with a basis weight of at least 100 g/m² and temperature resistance up to 500°C, ensuring the expansion pressure is directed effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sheet metal jacket is used for the fire protection sleeve, then the expansion pressure of the intumescent material is well supported and directional expansion is ensured, but the jacket becomes inflexible and difficult to cut to desired dimensions on site
Solution Approach 1:
The patent replaces the rigid sheet metal jacket with a flexible mat jacket that can be easily cut and adapted on-site. The flexible mat still provides sufficient support for directional expansion while allowing easy installation in various configurations and tight spaces.
Solution Approach 2:
The patent changes the material parameter from rigid sheet metal to flexible mat material. This parameter change maintains the structural support function while dramatically improving flexibility and ease of on-site cutting and installation.
2Strength
If a sheet metal jacket is used for the fire protection sleeve, then sufficient structural support is provided, but the sleeve cannot be adapted to narrow bending radii and tight spaces
Solution Approach 1:
The flexible mat jacket can be bent to narrow radii and adapted to tight spaces while still providing the necessary structural support for the intumescent material expansion. This resolves the contradiction between strength and adaptability.
Solution Approach 2:
The jacket transitions from a rigid, fixed-geometry structure to a flexible, adaptable structure that can be configured dynamically to fit various installation scenarios including narrow bending radii and tight spaces.
3Reliability
If the jacket edge is folded over the intumescent strip, then the directivity of the cladding is improved, but the edge width must be carefully controlled to avoid affecting expansion
Solution Approach 1:
The patent applies different edge width specifications at different locations: the first longitudinal edge has a width of at least half the intumescent strip thickness to ensure proper directionality, while the second longitudinal edge has a width of at most 90% of the intumescent strip width to avoid interfering with expansion. This local differentiation resolves the contradiction between directivity and expansion freedom.
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 flexible mat jacket enables easy adaptation to various conditions, efficient length adjustment, and effective directional expansion of the intumescent material, even in tight spaces, while maintaining structural integrity and cost-effectiveness.
Implementation Method 1
the jacket has a basis weight of at least 100 g/m2. Such a material provides the necessary strength to steer the expansion pressure of the intumescent strip that occurs in the event of a fire in the desired direction
Implementation Method 2
In the event of a fire, they are used to close openings through walls, ceilings or floors of buildings through which flammable or melting pipes, cables or the like are routed. For this purpose, the fire protection sleeve is arranged around the pipes or cables, so that in the event of a fire the expanding intumescent material closes the opening as tightly as possible.
Data Source
Figure 1~2
Figure 3~8
Figure 9~11
AI summary
The fire protection collar (10) has a casing (14) made of a fire-proof material and a strap (12) made of an intumescent material. The casing comprises a flexible mat, which is turned around one of the longitudinal edges of the intumescent strap, such that the casing surrounds the intumescent strap on a flat side and one of the longitudinal edges. The casing is connected with the intumescent strap by clamps. The casing is made of filaments of glass, stone, ceramic or metal.