Fire Suppression Ladder with Integrated Spray Nozzles
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Solution Overview
Problem
In situations involving electrical fires in manholes or firefighting, existing ladders lack adequate fire protection for individuals, posing risks of injury or death due to the conductive nature of metal ladders and the hazardous effects of water on electrical fires.
Innovation Solution
A ladder equipped with a fluid dispensing kit that includes strategically positioned spray nozzles and a fire suppressant composition, which can be manually or remotely activated, providing a non-conductive and fire-resistant barrier around the user, allowing for controlled dispersion of a fire suppressant to protect individuals from electrical fires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional metal ladder is used for inspection or firefighting, then the ladder provides structural support and accessibility, but the metal ladder conducts electricity and offers no fire protection, posing serious safety risks to individuals
Solution Approach 1:
The patent introduces a non-conductive coating as an intermediary layer between the metal ladder and the electrical/fire hazards. This coating acts as a mediator that prevents direct contact between the conductive metal surface and harmful electrical energy or flames, thereby eliminating the dangerous properties while preserving the ladder's structural function
Solution Approach 2:
The patent applies a composite material solution by coating the metal ladder with fire-resistant, non-conductive materials. This creates a composite structure where the metal core provides mechanical strength while the outer protective layer provides electrical insulation and fire resistance, combining the benefits of different materials to resolve the contradiction
2Reliability
If water is used to suppress electrical fires, then the fire suppression capability is improved, but water conducts electricity and can cause electrocution, worsening the safety situation
Solution Approach 1:
The patent changes the physical and chemical parameters of the suppressant by using foam instead of liquid water. The foam structure traps air bubbles within a matrix, creating a material that can suppress fire through physical barrier formation while the foam's cellular structure reduces electrical conductivity compared to liquid water, thereby maintaining fire suppression capability while reducing electrical hazard
3Reliability
If a fire suppressant is applied to protect an individual on the ladder, then fire and electrical protection is improved, but the complexity of the ladder system increases due to additional components
Solution Approach 1:
The patent implements a self-service mechanism where the ladder system automatically detects fire or electrical hazards and activates the fire suppressant without requiring manual intervention. The system uses sensors to detect harmful conditions and automatically triggers the suppressant delivery, making the system self-protecting and reducing operational complexity
Solution Approach 2:
The patent creates a multi-functional ladder system that combines the traditional climbing function with integrated fire suppression and electrical protection capabilities. The single ladder structure serves multiple purposes: structural support, electrical insulation, and fire protection, thereby managing complexity by consolidating multiple safety functions into one unified system
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 ladder effectively suppresses electrical fires by adhering a fire suppressant to the individual and ladder, preventing the spread of flames and giving users time to exit safely, while maintaining structural integrity and OSHA compliance.
Implementation Method 1
adhering a fire suppressant to the individual and ladder
Implementation Method 2
strategically positioned spray nozzles... providing a non-conductive and fire-resistant barrier
Data Source
AI summary
A safety ladder for protecting a lineman or firefighter from a flash fire. The ladder has the appearance of a conventional ladder but include fluid conduits that allow for dispensing of a fire suppressants to be sprayed over an individual using the ladder should a fire erupt. The rungs of the ladder have spray nozzles located along the bottom of the rung so that they do not interfere with normal use of the ladder. A pressurized container of fire suppressants is coupled to the ladder, through a battery powered solenoid valve. The solenoid valve can be operated by the individual using the ladder by use of a triggering device, or remotely by an individual positioned apart from the ladder by a remote triggering device. The triggering device can be operated electrically or by radio frequency, can be temperature sensitive, or can be manually bypassed.