Quick-Action Rolling Door Sealing Without Extra Opening Force
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Solution Overview
Problem
High-speed roller doors used in cold and freezer rooms face challenges in achieving rapid opening and closing while maintaining a tight seal, especially when required to meet fire safety regulations, as the forces needed to open tightly sealed doors increase, and existing solutions often require additional pressure supply and control systems.
Innovation Solution
A high-speed roller door design featuring a pressing device with a pressure frame that can be quickly activated and deactivated to ensure a flat and reliable seal, using spindle drives and spring mechanisms to manage the door's movement and sealing, allowing for rapid operation and compliance with fire protection standards without additional drive systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door leaf is tightly sealed against the door frame using magnetic fixation, grooves, or special seals, then the airtightness and fire protection performance are improved, but the forces required to open the door by winding up the door leaf increase significantly
Solution Approach 1:
The pressing device is divided into multiple independent pressing elements distributed along the door leaf, allowing the sealing force to be segmented and applied at multiple locations rather than concentrated at one point, reducing the peak force required to overcome the seal during opening
Solution Approach 2:
The pressing device uses a spring mechanism that provides dynamic pressing force, automatically adjusting the seal pressure based on the door position and external conditions, allowing the seal to be tight when closed but reducing resistance during the opening process as the spring force varies with compression
2Reliability
If a pressure device with cylinders is used to press the door leaf against the frame, then the sealing performance is improved, but the device complexity increases due to additional pressure supply and control systems
Solution Approach 1:
The pressing device is designed to be self-regulating through spring mechanisms that automatically adjust and maintain the required pressing force without external control, eliminating the need for complex pressure supply systems, sensors, and control electronics
Solution Approach 2:
The invention extracts and eliminates the complex control system (cylinders, pressure supply, sensors) from the pressing device, replacing it with a simple mechanical spring-based system that achieves the same sealing function without additional complexity
3Speed
If the door leaf is made flexible and lightweight for high-speed operation, then the opening and closing speed is improved, but the ability to maintain a tight seal and withstand fire protection requirements deteriorates
Solution Approach 1:
The door leaf is designed with local quality variations - the main body remains flexible and lightweight for high-speed operation, while specific local areas (edges and sealing surfaces) are reinforced or equipped with pressing elements to ensure tight sealing and fire resistance where needed
Solution Approach 2:
The door leaf uses composite construction combining flexible materials (for speed) with fire-resistant and sealing materials (for reliability), creating a multi-functional structure that simultaneously achieves high-speed operation and maintains tight seals meeting fire protection standards
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 enables rapid opening and closing of the door while maintaining a tight seal, meeting both thermal insulation and fire safety requirements without extending opening and closing times or requiring separate drive systems for the pressure frame, ensuring efficient operation and safety.
Implementation Method 1
using spindle drives and spring mechanisms to manage the door's movement and sealing
Data Source
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AI summary
The high-speed door has a flexible door leaf (6) with a vertical running direction for closing a door opening limited by a door frame (1). It has a drive (7) for opening and closing the door and a pressure device with which the door leaf can be pressed against the door frame (1) in its closed position.