Cable Transit With Intumescent Sealing For Fire Protection
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Solution Overview
Problem
Existing cable and bus bar transits fail to provide effective smoke and fire protection, particularly in ship bulkheads and decks, as they do not adequately seal against heat and mechanical penetration, and lack comprehensive sealing solutions.
Innovation Solution
A transit system featuring a metal sleeve with intumescent strips and a glass fiber tissue hose, combined with a fire retarding agent and plastic-coated metal straps, which seals cables or bus bars through partitions, expanding to prevent smoke and fire spread by swelling intumescent materials and compressing to prevent mechanical intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple transit structure is used for cable passage, then installation ease is improved, but smoke and fire protection capability deteriorates
Solution Approach 1:
The transit is divided into multiple functional segments: a base structure for mechanical support, intumescent strips for fire protection, and a tissue hose for sealing. This segmentation allows each component to specialize in one function, maintaining installation simplicity while achieving comprehensive fire protection through coordinated components.
Solution Approach 2:
The transit employs composite material structures combining metal or plastic base materials with intumescent fire-retardant materials. This composite approach provides both mechanical strength for easy installation and fire protection capabilities, resolving the contradiction between structural simplicity and protective performance.
2Object-affected harmful factors
If intumescent material is added for fire protection, then smoke and fire protection is improved, but device complexity increases
Solution Approach 1:
The intumescent material is applied as thin strips or coatings rather than bulky structures. These flexible, thin-layer intumescent components provide fire protection without significantly increasing structural complexity or interfering with the simple transit design. The thin-film approach maintains ease of installation while delivering effective fire retardation.
3Reliability
If a comprehensive sealing solution with multiple components is used, then fire protection reliability is improved, but installation time increases
Solution Approach 1:
Multiple fire protection functions are merged into an integrated transit assembly where the base structure, intumescent strips, and tissue hose are pre-combined. This merging allows the comprehensive fire protection system to be installed as a single unit rather than separate components, maintaining high reliability while reducing installation time through simplified installation procedures.
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 enhanced smoke and fire protection by sealing cables or bus bars through partitions, with intumescent materials reacting at high temperatures and metal straps ensuring mechanical integrity, offering both initial and comprehensive fire protection.
Implementation Method 1
an intumescent material will swell when exposed to extensive heat, such as by fire
Implementation Method 2
metal straps ensuring mechanical integrity
Data Source
AI summary
The present invention concerns a transit for cables, a cable bundle (9) or a bus bar (12). The transit comprises a sleeve (1) having a through opening (2) for receiving the cables or the bus bar (12). The sleeve (1) is to be received in a through opening (5) of a partition (4). A glass fiber tissue hose (7) is placed going through the opening of the sleeve (1). The ends of the tissue hose (7) is wrapped back and placed on the outside of the sleeve (1). One or more intumescent strips (6) are placed between the inside of the sleeve (1) and the tissue hose (7). A fire retarding agent (10) is placed around and between the cables or around the bus bar (12).