Fire-proof Cable Bushing with Intumescent Layer
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Solution Overview
Problem
Existing fire-protected cable bushings are complex, expensive, and not suitable for retrofitting, making them difficult to install and maintain effectively.
Innovation Solution
A fire-proof cable bushing composed of half-shells with an intumescent layer and plug-and-clamp connectors, allowing for easy assembly and installation, suitable for both new and existing structures, with the intumescent layer expanding to provide effective fire protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fire-protected cable bushings are used, then fire protection is provided, but the construction is complicated and expensive
Solution Approach 1:
The cable bushing is divided into two half-shells that can be assembled separately around existing cables or conduits. This segmentation allows for simpler manufacturing of each half-shell and easier installation by wrapping them around existing structures, rather than requiring complex pre-assembled housings.
Solution Approach 2:
The half-shells are designed as flexible, wrapable components that can be molded around existing cables or conduits. This flexibility simplifies the overall structure compared to rigid, pre-formed housings and enables retrofitting applications where the bushing must adapt to existing installations.
2Reliability
If traditional fire-protected cable bushings are used, then fire protection is provided, but installation and retrofitting are difficult and expensive
Solution Approach 1:
The split into two half-shells allows installers to wrap the components around existing cables or conduits without disassembling complex housings. This modular approach significantly simplifies both new installations and retrofits compared to traditional single-piece bushings.
Solution Approach 2:
The half-shells are designed to be flexible during installation, allowing them to be molded around existing structures. After installation, they provide rigid fire protection. This dynamic adaptability during installation greatly improves ease of operation.
3Reliability
If traditional fire-protected cable bushings are used, then fire protection is provided, but retrofitting is not suitable or requires great effort
Solution Approach 1:
The two half-shells can be wrapped around existing cables or conduits in retrofitted installations, providing fire protection without requiring complete system replacement. This segmentation makes the solution highly adaptable to existing infrastructure.
Solution Approach 2:
The flexible nature of the half-shells allows them to conform to existing cable bundles or conduits during retrofitting, making the fire protection solution suitable for a wide range of existing installations that would not accommodate traditional rigid bushings.
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 simple, cost-effective, and efficient fire protection system that can be easily retrofitted, offering excellent fire resistance and smoke prevention without the need for additional protective measures.
Implementation Method 1
At least one of the half-shells is at least partially coated on its inside with an intumescent layer
Implementation Method 2
the intumescent layer expanding to provide effective fire protection
Data Source
Figure 1
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Figure 3
AI summary
The bushing (1) has half-shells (2, 3) turned towards opened sides and partially coated on an inner side of the half-shells with an insulating layer element (4). The half-shells are connected together by a plug-in and/or clamping connector (5) by forming a hollow body (6). The half-shells and/or the plug-in and/or clamping connector consist of plastic e.g. PVC, polyethylene or polypropylene. The hollow body comprises a circular, rectangular or quadratic cross-section. Open front sides (14) of the hollow body are closed by caps (7, 8) and/or foam sections. An independent claim is also included for an arrangement comprising a fire-proof cable guidance and a cable.