Adjustable Firestop Penetration Sleeve With Bayonet Sealing
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Solution Overview
Problem
Existing firestop devices for passing cables and pipes through concrete structures lack adjustable height options and effective sealing mechanisms to prevent concrete flow and ensure fire resistance.
Innovation Solution
A cast-in pass-through firestop device featuring a hollow tubular body with a bayonet locking mechanism that allows height adjustment and a sealing ring to prevent concrete flow, combined with an intumescent firestop material for enhanced fire resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-height firestop device is used, then the device structure is simple, but the device cannot adapt to different installation heights
Solution Approach 1:
The firestop device is divided into multiple tubular body parts (first tubular body part, second tubular body part) that can be stacked vertically. Each tubular part can be independently adjusted in height, allowing the overall device height to be customized for different installation requirements while maintaining a relatively simple modular structure
Solution Approach 2:
The device incorporates a bayonet locking mechanism with a key pin that can be positioned at different heights along the tubular body. This dynamic adjustment mechanism allows the device to change its overall height by shifting the key pin between different horizontal passages, providing adaptability without requiring a completely complex structure
2Reliability
If a sealing mechanism is added to prevent concrete flow, then the sealing effectiveness is improved, but the device complexity increases
Solution Approach 1:
A sealing ring is introduced as an intermediary component between the tubular body parts. The sealing ring includes a sealing ridge that engages with the key passage, creating an effective seal that prevents concrete flow along the vertical passages. This intermediary sealing element provides reliable concrete flow prevention while keeping the overall mechanism relatively simple
3Ease of operation
If the key passage is made accessible for height adjustment, then the ease of operation is improved, but concrete may flow into the key passage
Solution Approach 1:
The sealing ring acts as a protective intermediary that seals the key passage opening. The sealing ridge of the sealing ring engages with the key passage to prevent concrete from flowing into this accessible area, while still allowing the key pin to be shifted for height adjustment. This resolves the contradiction by protecting the accessible adjustment mechanism from concrete contamination
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 device provides adjustable height settings and effective sealing against concrete flow, ensuring fire resistance and ease of installation by allowing for precise adjustment and secure locking of the tubular body parts.
Implementation Method 1
A sealing ring is mounted rotatably on the first tubular body part and comprises a radially projecting sealing ridge. The sealing ridge is engaged with the second section of the key passage. The sealing ring can prevent concrete to flow along the vertical passages of the bayonet mechanism.
Implementation Method 2
An inlay made of intumescent firestop material arranged within the hollow tubular body.
Data Source
AI summary
A cast-in pass-through firestop device has a hollow tubular body, a bayonet mechanism for adjusting a height, a sealing ring engaged with the bayonet mechanism, and an inlay made of intumescent firestop material arranged within the hollow tubular body.