Firefighting Telescoping Waterway With Integrated Valve Interlock
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Solution Overview
Problem
Existing telescoping waterways in firefighting equipment face challenges due to space constraints in pump compartments, fixed inlet locations, and risks of equipment damage from pressure when partially extended, limiting optimal extension height and interfering with other components.
Innovation Solution
A telescoping waterway design with a novel manifold, integrated rotating shutoff element, and configurable inlet components that allow for increased extension height, reduced space requirements, and safety controls, including a valve interlock to prevent operation under improper conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the telescoping waterway is extended to increase monitor height, then the firefighting monitor can discharge fluid at optimal angles and reach greater distances, but the inner tube may separate from the outer tube due to reaction forces and pressure
Solution Approach 1:
The patent applies preliminary anti-action by providing travel stops that prevent the inner tube from moving beyond safe extension positions. These stops are positioned to counteract the reaction forces and pressure that would otherwise cause tube separation, allowing the waterway to be extended to optimal heights while maintaining connection integrity.
Solution Approach 2:
The travel stops are pre-positioned within the outer tube at specific locations that correspond to safe extended positions. This preliminary arrangement ensures that when the inner tube is extended, it automatically engages these pre-placed stops, preventing over-extension before pressure or reaction forces can cause separation.
2Area of stationary object
If the telescoping waterway is extended to reduce space requirements in pump compartments, then the monitor can be positioned optimally, but the structure must withstand reaction forces when discharging fluid
Solution Approach 1:
The patent applies nesting by placing the inner tube within the outer tube, allowing the telescoping waterway to collapse to a compact size when retracted. This enables optimal positioning of the monitor while minimizing the space required in the pump compartment. The nested structure is designed to withstand reaction forces through proper structural support between the tubes.
Solution Approach 2:
The waterway is divided into segmented tubes (inner and outer) that can extend and retract independently. This segmentation allows the structure to maintain strength when extended to withstand reaction forces, while also enabling compact storage when retracted to save pump compartment space.
3Device complexity
If the inlet component is fixed at a specific location, then the waterway structure is simplified, but the ability to optimize component routing and adapt to different configurations is limited
Solution Approach 1:
The inlet component is designed to be rotatable or adjustable relative to the outer tube, transforming it from a fixed to a dynamic element. This allows the inlet to be positioned at different locations and angles to optimize routing and adapt to different configurations, while the overall waterway structure remains relatively simple through standardized tube components.
Data Source
AI summary
A telescoping waterway component for use in firefighting equipment has a multi-piece outer tube and a telescoping inner tube through which fluid flows. An inlet component is selectively positionable at different inlet heights along the outer tube and can be positioned to provide different inlet angles. A rotating shutoff element is mounted within a manifold of the inlet component. The inner tube can be retracted to nest within a hollow cross-section of the shutoff element when that element is closed. A valve interlock disables an operator from rotating the shutoff element while the inner tube is retracted, or from retracting the inner tube while the shutoff element is open.