Fire-Resistant Door Actuator Mounting with Intumescent Drive
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Solution Overview
Problem
Existing fire protection systems for doors often rely on combustible fluids in door actuators, which can heat up and ignite during a fire, posing a risk of inflammation.
Innovation Solution
A fire protection mounting facility that includes a frame with reaction chambers, where a thermally intumescent drive element is arranged to push the door operator away from the assembly area when activated by heat, preventing overheating and potential ignition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a door actuator uses combustible hydraulic fluid for operation, then the door operator can function reliably, but the fluid can overheat and ignite during a fire event
Solution Approach 1:
The mounting facility is divided into separate reaction chambers that can independently respond to heat, allowing localized detachment of the door actuator from the mounting surface during fire events while maintaining normal operation under normal conditions
Solution Approach 2:
A thermally responsive intermediate material is introduced between the door actuator and mounting surface that remains stable during normal operation but activates at elevated temperatures to push the door actuator away, preventing direct contact and heat transfer during fire events
2Reliability
If the door operator is securely mounted to the mounting surface, then reliable operation is ensured, but the door operator cannot be detached during a fire to prevent ignition
Solution Approach 1:
The mounting system transitions from a static secure connection to a dynamic responsive connection that automatically adjusts its state based on temperature conditions, being firmly mounted during normal operation and automatically detaching when fire conditions are detected
Solution Approach 2:
The mounting system's mechanical properties change in response to temperature parameter changes, with the thermally responsive material transitioning from a stable mounting state at normal temperatures to an expansive detached state at elevated temperatures
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
Effectively prevents the door operator from overheating and igniting by mechanically detaching it from the assembly area upon heat activation, thereby ensuring operational safety during a fire.
Implementation Method 1
a thermally intumescent drive element (7) arranged in the reaction chamber (4) to push the door operator (102) away from the mounting surface (101) when a temperature that activates the thermally intumescent material has been reached
Data Source
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AI summary
The invention relates to a fire-resistant fastening device (1) for fastening a door actuator (102), comprising a frame (3) with a rear side (5) facing a mounting surface (101), in particular a door, frame or wall, wherein a mounting axis (2) is defined perpendicular to the rear side (5), and wherein the frame (3) is designed for arrangement between a door actuator (102) and the mounting surface (101) or is an integral part of the door actuator (102), at least one reaction chamber (4) formed in the frame (3), wherein the reaction chamber (4) is fully enclosed by the frame (3), and wherein the reaction chamber (4) is open at the rear side (5) and/or a front side (6) of the frame (3) opposite the rear side (5), and a drive element (7) made of thermally intumescent material arranged in the reaction chamber (4), which is designed toupon thermal activation, the door actuator (102) is pushed away from the mounting surface (101).