Segmented Fire Barrier Flaps with Intumescent Coating
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Solution Overview
Problem
Existing fire protection devices for pipelines have insufficient sealing effects and are vulnerable to fire attacks due to unprotected metal surfaces and uncontrolled foaming of intumescent materials, leading to deformation and loss of sealing integrity.
Innovation Solution
The fire protection device features segmented closure flaps made of metal, covered on both sides with internal plate segments and reinforced with elastically deformable spring steel plates, which guide the foaming material towards the pipe's inner circumference, ensuring a directed expansion and maintaining sealing integrity under heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If segmented closure flaps are made of metal, then structural strength is improved, but fire resistance deteriorates due to unprotected metal surfaces
Solution Approach 1:
The closure flaps are constructed as composite structures combining metal substrates with intumescent material coatings and protective plate segments. This multi-layer composite design allows the metal to provide structural strength while the intumescent material and plates provide fire protection, resolving the contradiction between strength and fire resistance
2Object-affected harmful factors
If intumescent material is applied to closure flaps, then fire protection is improved, but sealing effectiveness deteriorates due to uncontrolled foaming
Solution Approach 1:
The intumescent material is applied in specific localized zones rather than uniformly across the entire flap surface. Plate segments are strategically positioned to control where foaming occurs, ensuring that expansion happens in predetermined areas that maintain sealing effectiveness while still providing fire protection
Solution Approach 2:
Protective plate segments act as intermediaries between the intumescent material and the external environment. These plates constrain and guide the foaming process, allowing the intumescent material to expand in a controlled manner that maintains sealing integrity while providing fire protection
3Ease of operation
If closure flaps are segmented, then ease of operation is improved, but sealing effectiveness deteriorates due to insufficient edge seal
Solution Approach 1:
Plate segments serve as intermediary elements between the segmented closure flaps and the sealing surface. These plates bridge the gaps between individual flap segments, providing continuous edge sealing that prevents fire and gas penetration while maintaining the segmented structure's operational advantages
4Object-affected harmful factors
If intumescent material is allowed to foam freely, then fire protection is improved, but material loss increases due to tearing under negative pressure
Solution Approach 1:
The intumescent material is applied in specific localized zones rather than uniformly across the entire flap surface. This selective application ensures that foaming occurs only in predetermined areas where it provides fire protection, while other areas maintain structural integrity and resist material loss under negative pressure
Solution Approach 2:
The composite structure combining metal, intumescent material, and protective plates creates a multi-functional system where each layer compensates for the weaknesses of others. The metal and plates prevent material loss while the intumescent material provides fire protection, resolving the contradiction between fire protection and material loss
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
This solution provides an improved edge seal and prevents material loss during strong negative pressure, ensuring the closure flaps remain functional and maintain their sealing effectiveness even under intense heat and pressure.
Implementation Method 1
reinforced with elastically deformable spring steel plates, which guide the foaming material towards the pipe's inner circumference
Implementation Method 2
internal plate segments made of an intumescent material, which, when viewed from the front, largely cover all closure plates made of metal in a flat manner
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Fire protection device for pipelines, in particular ventilation pipelines, with a housing (2) which accommodates a spring-loaded, flap-shaped closure device (37, 38) pivotable approximately parallel to the plane of the wall of the housing (2), the pivot axis of which is aligned approximately perpendicular to the axis of the pipeline, wherein the closure device (37, 38) consists of one or more segment-shaped closure flaps (8a, 9a, 10a) which thereby conform to the roundly curved wall of the round-profiled housing (1, 2, 4) and, in the pivoted rest position, have a shape adapted approximately to the roundly curved wall and, in the pivoted working position, an approximately straight surface extent, wherein the metallic closure flaps (8a, 9a, 10a) are covered at least on one side with plate segments (13, 14, 15) which foam up upon exposure to heat, wherein the front and back of each closure flap (8a, 9a,10) is covered with foamable plate segments (13-15) which are covered on both sides by a flexible spring steel plate (5, 6) that covers the locking device (37, 38) almost completely.