Fire-Proof Smoke Seal Strip for Curtain Side Guide
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Solution Overview
Problem
Existing smoke seals, such as nylon brushes and edge formations, fail to effectively prevent smoke passage through side guides and headboxes at elevated temperatures and under fire pressure, as they melt or disengage from the guides, allowing smoke to enter the room or space.
Innovation Solution
A smoke seal comprising a pair of sides with in-turning lips and a strip of fire-proof material extending from each side, directed towards the channel's center, which contacts the curtain to form a barrier against smoke passage, maintaining contact even under movement and high temperatures due to its flexibility and resilience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nylon brush formations are used to form a partial seal in the side guide, then smoke passage is prevented at low temperatures, but the brushes melt at approximately 200°C and are no longer effective above these temperatures
Solution Approach 1:
The patent changes the material parameter from nylon (melting point ~200°C) to fire-proof material that maintains structural integrity at temperatures exceeding 200°C, directly resolving the temperature resistance contradiction while preserving the smoke sealing function
Solution Approach 2:
The invention uses composite material construction combining fire-proof material with resilient properties, creating a seal strip that simultaneously achieves high temperature resistance and maintaining elasticity for effective smoke sealing under fire conditions
2Reliability
If flaps are positioned on the edge formations of the curtains to contact the side guides, then a seal is formed, but the flaps can disengage from the side guides under smoke/fire pressure, allowing smoke to pass
Solution Approach 1:
The patent transitions from rigid flap structures to a dynamic resilient strip that can deform and adapt under fire pressure, maintaining continuous contact with the curtain edge while accommodating movement forces without disengagement
Solution Approach 2:
The resilient strip is pre-configured to absorb and cushion the impact of fire pressure through its elastic properties, preventing the seal from disengaging under extreme conditions by beforehand preparing the material to deform rather than fail
3Reliability
If rigid seal structures are used to prevent smoke passage, then sealing effectiveness is improved, but the seals cannot accommodate curtain movement under fire pressure
Solution Approach 1:
The patent employs a flexible strip made of fire-proof material that combines the strength of rigid structures with the adaptability of flexible elements, allowing the seal to maintain smoke barrier effectiveness while accommodating curtain movement through elastic deformation
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 smoke seal effectively prevents smoke passage through side guides and headboxes by maintaining contact with the curtain, ensuring a reliable seal even during fire conditions, as the fire-proof material remains intact and flexible, preventing smoke from entering the room or space.
Implementation Method 1
the strip is arranged such that on contact with the curtain at least a portion of the strip is directed away from the opening and the strip does not pass through the lips
Data Source
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AI summary
A side guide for a smoke or fire curtain comprises:- a pair of sides defining a channel and having in-turning lips at one end defining an opening; and at least one strip of a fire-proof material extending from at least one side and directed towards a centre of the channel, extending the length of the side and of a width to contact a curtain deployed between the sides, wherein when the curtain is deployed in the side guide the strip contacts the curtain and forms a barrier to passage of smoke through the side guide, and wherein the strip is arranged such that on contact with the curtain at least a portion of the strip is directed away from the opening and the strip does not pass through the lips.