Building Rescue Descender With Threaded Rod Stabilization
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Solution Overview
Problem
Existing slow-descent escape devices for high-rise buildings are prone to shaking, lack user protection, and have complex structures that are unreliable and costly to maintain, making them unsafe and impractical for widespread use.
Innovation Solution
A descended rescue device featuring a movable rod with external threads and an open-closing flange nut structure, including internal threads, flange nut stop pins, and thrust rollers, which stabilizes descent and allows for easy operation, reducing maintenance costs and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If rope suspension is used to hang evacuees from the outside of the building, then the escape device can be deployed, but the device is easy to shake and lacks protection for personnel
Solution Approach 1:
The patent employs a dynamic braking mechanism where the descender device includes a brake shoe that can engage with a brake drum to provide controllable resistance during descent. This dynamic braking system allows the device to transition from uncontrolled swinging to controlled descent, eliminating the shaking problem while maintaining ease of deployment through simple operational steps.
Solution Approach 2:
The escape device is divided into separate functional modules: a descender device with braking mechanism, a loading disc with guide trenches, and a coupling disc with clamps. This segmentation allows each component to perform its specific function independently, improving overall reliability while keeping the deployment process simple and straightforward.
2Reliability
If fixed slow-down escape ladders are used, then personnel protection is improved, but the structures are too complex and mechanisms are prone to failure
Solution Approach 1:
The patent extracts the essential function of controlled descent from complex fixed escape ladders by using a simple movable descender device that attaches to a rope. This removes unnecessary structural complexity while maintaining personnel protection through the integrated braking mechanism and guide trench design that prevents swinging and ensures stable descent.
Solution Approach 2:
The descender device serves multiple functions: it provides controlled descent through braking, prevents swinging through guide trenches, and allows easy attachment and detachment. This multi-functionality in a single compact device replaces complex multi-component escape ladders, reducing structural complexity while maintaining or improving personnel protection.
3Reliability
If existing fixed slow-down escape ladders are used, then personnel protection is improved, but maintenance cost increases
Solution Approach 1:
The patent designs a cost-effective descender device with simple components that can be easily replaced if needed. The brake shoe, brake drum, and coupling mechanisms are designed as affordable, replaceable parts that reduce maintenance costs compared to complex fixed escape ladders. The simplicity of the design means fewer parts fail and lower repair expenses.
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 stable and easy operation with reduced maintenance, ensuring safe and reliable evacuation by minimizing shaking and mechanical failures, suitable for various building heights and floor configurations.
Implementation Method 1
a movable rod, a threaded structure. Descending thread rod includes external threads formed on an outer wall thereof
Implementation Method 2
Multiple outer ring thrust rollers and Multiple inner ring thrust rollers screwed on a bottom of the upper cover
Data Source
AI summary
A descended rescue device for a building contains: a movable rod and a threaded structure. Descending thread rod includes external threads and a flange nut stop pin, and Open-closing flange nut structure for descending includes internal threads, a upper cover, a Load flange nut rotor, a bottom cap, a fixed connection element, and a movable connection element. The upper cover includes a first passing orifice, a Cutting face of upper cover, two second coupling orifices, a third coupling orifice, a fourth coupling orifice, multiple first rings, multiple second receiving orifices, Multiple outer ring thrust rollers, and Multiple inner ring thrust rollers. The bottom cap includes a second passing orifice, a third tangent slot, two third coupling orifices, a fourth coupling orifice, a fifth coupling orifice, multiple second rings, multiple third receiving orifices, multiple third threaded nuts, and multiple fourth threaded nuts. The fixed connection element includes a first lid, a second lid, a third lid, and two joining stems.