Rescue Vehicle Water Supply Separation Device
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Solution Overview
Problem
Existing water supply systems for rescue vehicles, such as firefighting vehicles, fail to comply with new regulations requiring strict separation between drinking water from external sources and non-drinking water stored in tanks, risking contamination of public hydraulic networks with chemical agents or tank contents.
Innovation Solution
A water supply system with a separation device that allows fluidic bypass between input hydraulic couplings and the tank, preventing direct physical communication and using a tapered pipe configuration to ensure pressurized water flow without backflow, while allowing operation modes for tank filling, external water supply, and fire extinguishing fluid delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a direct fluidic connection between the tank and external water sources is maintained, then operational functionality is preserved, but contamination risk increases and regulatory compliance is violated
Solution Approach 1:
The water supply system is divided into two separate fluidic circuits: a first circuit for non-drinking water from the tank and a second circuit for drinking water from external sources. This segmentation allows each circuit to operate independently, preventing contamination while maintaining both tank-based and external source operational modes
Solution Approach 2:
A three-way valve is introduced as an intermediary device to control fluid flow between the two separate circuits and the pump. This valve enables selective connection of either the tank or external water sources to the pump without direct mixing, ensuring regulatory compliance while preserving operational versatility
2Reliability
If separate fluidic circuits are implemented for drinking and non-drinking water, then contamination is prevented, but system complexity increases
Solution Approach 1:
The pump is configured to receive fluid from both the first circuit (tank) and second circuit (external sources) through a common suction port, and the three-way valve merges these two separate circuits into a single output stream. This merging approach prevents contamination while minimizing the number of separate pump systems needed
3Use of energy by moving object
If the tank is positioned to allow gravity feed, then energy consumption is reduced, but backflow into the tank may occur causing contamination
Solution Approach 1:
The three-way valve acts as an intermediary that controls the direction of fluid flow between the external sources and the tank. When external pressurized water is supplied, the valve directs flow away from the tank, preventing backflow contamination while still allowing gravity feed operation when the tank is the water source
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 system effectively separates drinking and non-drinking water, preventing contamination and maintaining operational functionality, ensuring compliance with new regulations while being cost-effective and compact, with electronic control for automatic operation.
Implementation Method 1
a tapered pipe configuration to ensure pressurized water flow without backflow
Data Source
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AI summary
Water supply system (1) for a tank (2) for a rescue vehicle (1), comprising: • a tank (2) defining an inner space (3) configured to store water; • at least a hydraulic coupling (5) for hydraulic connecting with a source (H) of water in pressure, • at least an hydraulic output (9) for hydraulic connecting with an output device for ejecting a pressurized fluid; wherein the at least a hydraulic coupling (5) is fluidly connected by a conduit (6) to the tank (2) in order to allow its filling, the water supply system (1) further comprising a separation device (11) in fluidic communication with inner space (3) of the tank (2) and configured to allow a hydraulic bypass between the at least one hydraulic coupling (5) and the hydraulic output (9), without a direct physical fluidic communication between these latter.