Rail-Guided Firefighting Machine Lifting Mechanism
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Solution Overview
Problem
Conventional firefighting systems face challenges in tunnels and underground transportation systems due to smoke, soot, high heat, and reduced oxygen, making human intervention dangerous, and existing self-propelled firefighting machines are complex and prone to damage when navigating poor visibility and rugged terrain.
Innovation Solution
A fluid-jet emitting firefighting machine with a transport vehicle that can move along rails safely, equipped with lifting members and a control device to adjust idler wheels for reduced pressure and improved traction, allowing for rapid and stable movement without complex structural setups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If self-propelled firefighting machines are used to navigate rugged terrain and poor visibility, then human safety is improved by eliminating human intervention in dangerous environments, but the machine complexity and susceptibility to damage increases
Solution Approach 1:
The patent introduces rails as an intermediary infrastructure element that guides and supports the firefighting machine. The rails serve as a mediator between the machine and the complex terrain, providing a stable, predetermined path that eliminates the need for the machine to navigate difficult ground conditions independently, thus improving reliability while managing complexity through infrastructure support
Solution Approach 2:
The firefighting machine is divided into separate functional modules: propulsion system, fluid-jet emitting device, and control system. This segmentation allows each component to be optimized independently and facilitates easier maintenance and repair, reducing overall system complexity while maintaining operational safety in dangerous environments
2Speed
If railway carriages are used to transport the firefighting machine along tracks, then movement safety and speed are improved, but the structural complexity and manageability worsens due to complex setup requirements
Solution Approach 1:
The firefighting machine incorporates adjustable lifting members that can dynamically change the machine's position relative to the rails. The lifting members can be raised or lowered based on operational requirements, allowing the machine to adapt its configuration for different situations (transport mode vs. operational mode), thus improving speed while managing structural complexity through dynamic adaptability
Solution Approach 2:
The firefighting machine is designed with multi-functionality, serving both as a rail-guided transport vehicle and as a stationary fluid-jet emitting device. The same chassis and frame structure support both movement functions and firefighting operations, eliminating the need for separate specialized structures and reducing overall structural complexity
3Reliability
If idler wheels are pressed against rails to reduce pressure on movement means, then traction and guidance are improved, but the machine complexity increases due to additional lifting members and actuators
Solution Approach 1:
The lifting members are designed to provide partial support to the machine weight rather than complete support. The idler wheels press against the rails with just enough force to provide adequate guidance and traction, while the movement means (tired) continue to bear the majority of the machine's weight. This partial action approach improves reliability of rail contact without requiring overly complex or heavily engineered lifting systems
Data Source
AI summary
A fluid-jet emitting machine, particularly a firefighting machine, comprises a fluid-jet emitting device, a transport vehicle, lifting members and a control device.Each lifting member comprises an actuator constrained to the transport vehicle and at least one idler wheel adapted to engage a rail of a track.The actuators are configured to move the respective wheels between a non-operative position, in which the wheels are distanced from the respective rail, and an operative position, in which the wheels are arranged in contact with the respective rail.The control device is operatively associated with the actuators to activate the passage of the wheels from the non-operative position to the operative position so that during movement along a track and in said operative position, the wheels prove to be pressed against the respective rail, exerting a force such as to reduce only part of the pressure exerted by the movement means of the vehicle on the track.