Intumescent Sleeve for Smoke Gas-Tight Cable Passage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for smoke gas-tight passage of elongated molded parts through fire protection walls are time-consuming and unsatisfactory, with potential air gaps remaining between the sleeve and the hole, leading to insufficient smoke gas security, and require significant manufacturing effort for multi-part collars.
Innovation Solution
A sleeve made of injection-moldable plastic with intumescent additives, featuring a detachable jacket area that can adapt to different diameters by compressing or expanding, ensuring a smoke gas-tight fit through a through-hole of varying sizes, and a funnel-shaped design for easier passage of cables of different diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fire protection putty is applied to fill the gap between the cable and the hole, then smoke gas tightness is improved, but the assembly process becomes time-consuming and unreliable
Solution Approach 1:
The sleeve is divided into a permanent base layer and a removable jacket layer. The base layer remains in the through-hole to provide structural support and smoke gas sealing, while the jacket layer can be removed to adjust the inner diameter for different cable sizes. This segmentation eliminates the need for time-consuming putty application while ensuring reliable smoke gas tightness.
Solution Approach 2:
The sleeve with removable jacket is pre-installed in the through-hole before the cable is passed through. This preliminary action ensures that the smoke gas sealing structure is already in place, eliminating the need for subsequent putty application and ensuring that the sealing function is achieved before the cable installation is completed.
2Reliability
If a multi-part fire protection collar with metal housing and intumescent mass is used, then smoke gas tightness is improved, but manufacturing effort and device complexity increase significantly
Solution Approach 1:
The sleeve combines the structural function of the metal housing and the smoke gas sealing function of the intumescent material into a single integrated component made of injection-moldable plastic with intumescent additives. This merging eliminates the need for multi-part construction and complex assembly processes while maintaining both structural integrity and smoke gas tightness.
Solution Approach 2:
The sleeve is made from a composite material consisting of injection-moldable plastic with intumescent additives. This composite material provides both the structural properties needed for housing support and the intumescent properties needed for smoke gas sealing, replacing the need for separate metal and intumescent mass components.
3Ease of manufacture
If a fixed-diameter sleeve is used, then manufacturing is simplified, but adaptability to different through-hole diameters and cable sizes is reduced
Solution Approach 1:
The sleeve incorporates a removable jacket that allows dynamic adjustment of the inner diameter. The jacket can be removed in different configurations (partially or completely) to adapt the sleeve's inner diameter to match different cable sizes and through-hole diameters, while the base layer remains unchanged, maintaining manufacturing simplicity.
Solution Approach 2:
The sleeve is segmented into a permanent base layer and a removable jacket layer. This segmentation allows the jacket to be removed to adjust the effective inner diameter for different applications, providing versatility without complicating the manufacturing of the base structure.
4Shape
If fire protection putty is used to cover the mouth of the perforation, then aesthetic appearance is improved, but smoke gas tightness cannot be guaranteed
Solution Approach 1:
The removable jacket acts as a temporary component that can be removed after the cable is installed. It provides aesthetic coverage during installation and can be discarded or adjusted, while the permanent base layer ensures long-term smoke gas tightness. The jacket's temporary nature allows flexibility in achieving both appearance and sealing 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
The solution provides a simple, efficient, and secure smoke gas-tight passage for elongated molded parts of varying diameters, ensuring effective smoke gas tightness and ease of assembly, while reducing manufacturing complexity and air gaps.
Implementation Method 1
a sleeve made of intumescent material is provided, the outer dimension or the outer diameter of which is adapted to the through-hole
Implementation Method 2
the sleeve can be compressed due to its own resilience so that it forms a smaller diameter sleeve overall
Data Source
Figure 1
Figure 2
AI summary
The arrangement has a sleeve (1) e.g. intumescent material sleeve or plastic sleeve, including an external measurement or an external diameter, which corresponds to a diameter of a flow through punch hole of a fire protection wall. The intumescent material sleeve consists of plastic mass with intumescent additives, and the plastic sleeve consists inner and/or outer intumescent material coating. The diameter of the punch hole is slightly larger than a diameter of an elongated molded part. The sleeve is inserted into the punch hole, where the elongated molded part is guided trough the sleeve.