Lead-Through Conduit Layout for Fire-Resistant Shut-Off Valve Protection
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Solution Overview
Problem
Lead-through conduits made partially from plastic face challenges in maintaining shut-off valve functionality at high temperatures, such as those encountered in a building fire, without experiencing leakage due to melting of conduit parts.
Innovation Solution
The lead-through conduit design incorporates a shut-off valve housed in a second conduit part surrounded by a jacket, with a third conduit part in fluid connection, arranged to protect the shut-off valve from high temperatures. This configuration includes a mechanical connection for controlling the shut-off valve and optional features like a fuse for automatic closure in high-temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the lead-through conduit is manufactured partially from plastic, then ease of manufacture and cost are improved, but the shut-off valve cannot withstand high temperatures and leakage occurs due to melting of conduit parts
Solution Approach 1:
The conduit is divided into multiple segments: a first conduit part made of heat-resistant material (metal or high-temperature plastic) and a second conduit part made of plastic. The shut-off valve is positioned in the first conduit part, separating it from the plastic portion. This segmentation allows each part to be made from materials optimized for its specific functional requirements.
Solution Approach 2:
A coupling element serves as an intermediary component connecting the first conduit part (with shut-off valve) and the second conduit part (plastic). This coupling element acts as a transition zone that maintains the functional integrity of the shut-off valve while allowing the use of plastic in the downstream portion of the conduit.
2Device complexity
If the shut-off valve is positioned close to the connection point for simplicity, then device complexity is reduced, but the shut-off valve and conduit parts are exposed to high temperatures in case of fire
Solution Approach 1:
The conduit is divided into multiple segments: a first conduit part made of heat-resistant material (metal or high-temperature plastic) and a second conduit part made of plastic. The shut-off valve is positioned in the first conduit part, separating it from the plastic portion. This segmentation allows each part to be made from materials optimized for its specific functional requirements.
Solution Approach 2:
Different portions of the conduit are assigned different material properties: the first conduit part (containing the shut-off valve) is made of heat-resistant material to withstand high temperatures, while the second conduit part can be made of standard plastic. This local differentiation of material quality allows the system to meet both thermal resistance requirements and manufacturing ease requirements.
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 design effectively protects the shut-off valve from high temperatures, ensuring reliable operation even at temperatures up to 650°C, while maintaining the conduit's structural integrity and leak resistance.
Implementation Method 1
the second conduit part is surrounded by a jacket
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a lead-through conduit 1 which is manufactured wholly or partially from plastic and which comprises a first conduit part 3 and a safety device 10 with a shut-off valve 9 connecting thereto. This shut-off valve 9 is accommodated at a distance from a connection point in a second conduit part 6, which is in fluid connection with the first conduit part 3. The second conduit part 6 is surrounded by a jacket 12. Arranged between the shut-off valve 9 and the connection point 8 is a third conduit part 29 which is in fluid connection with the shut-off valve 9 and which is connected in tensively strong manner and/or non-rotatably to the second conduit 6 part or the shut-off valve 9 and the jacket 12. The invention also relates to a safety device for use in such a lead-through conduit.