Movable Fire Protection Insert for Pre-Cast Opening Sealing

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Solution Overview

Problem

Existing fire protection solutions for buildings require additional steps and do not provide immediate protection as they need to be mounted after the wall or ceiling has been cast, leaving a gap in fire safety until installation is complete.

Innovation Solution

A fire protection element with a movable insert and movement device that can be integrated into the formwork during wall or ceiling construction, allowing for early mounting and subsequent activation to ensure immediate fire protection without the need for additional steps like core drilling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If fire protection collars are mounted outside the wall after casting, then fire protection can be applied, but additional mounting steps are required and no fire protection exists during construction

Engineering Contradiction:

Improvefire protectionVSAvoidmounting steps

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The fire protection insert is pre-integrated into the formwork before the wall is cast, establishing fire protection in advance rather than adding it later. This eliminates the need for separate mounting steps after construction while ensuring fire safety is present throughout the entire construction process

Inventive Principle:

Principle #10Preliminary action

2Ease of manufacture

If fire protection insert is fixed in position during casting, then integration into wall is achieved, but no adjustment is possible after casting

Engineering Contradiction:

Improveintegration into wallVSAvoidposition adjustment

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The fire protection insert is designed with movable components including a sliding mechanism and spring element that allow it to be repositioned after the wall is cast. This dynamic design maintains easy integration during casting while enabling subsequent adjustment to accommodate different pipe positions or wall thicknesses

Inventive Principle:

Principle #15Dynamics

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

Enables early installation and immediate fire protection upon casting, eliminating the need for additional steps and ensuring fire safety without compromising the construction process, with the ability to be adjusted post-casting for optimal positioning.

Implementation Method 1

a movement device which acts on the fire protection insert, the fire protection insert being arranged so as to be movable in the longitudinal direction of the opening

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Implementation Method 2

In particular, intumescent materials are suitable for the inserts. In the event of a fire, the intumescent material foams up under the effect of heat and closes the opening

Methodology Applied

Scientific EffectIntumescent material expansion: Intumescent Materials

Data Source

PatentUS11850454B2Fire protection element

Publication Date: 2023.12.26 HILTI AG

AI summary

A fire protection element for sealing a combustible body, which penetrates an opening in a wall or ceiling, in the event of a fire, contains a fire protection insert and a movement device which acts on the fire protection insert, the fire protection insert being arranged so as to be movable in the longitudinal direction of the opening.