Dimensionally Stable Hose Reel for Firefighting
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Solution Overview
Problem
Current methods for laying hose lines and forming hose reserves during firefighting are time-consuming and prone to complications such as hose instability, knotting, and tripping hazards, which can compromise the quick and safe execution of firefighting operations, especially in inaccessible areas.
Innovation Solution
A method and device utilizing a dimensionally stable hose with a central water connection and a flexible transport bag, allowing for easy unwinding and handling of the hose, eliminating the need for additional hose reserves and enabling the hose to be filled and pressurized without preparation, while the hose reserve remains in the transport device, preventing tangles and wedging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hose lines are laid using rolled hoses or hose carriers, then the hose can be transported to the incident site, but the process is time-consuming and requires manual assembly of hose reserves
Solution Approach 1:
The hose is wound around a reel that is nested inside a transport bag. The reel can rotate independently within the bag, allowing the hose to be quickly unwound and deployed without manual unrolling or disassembly. This nested configuration enables rapid hose deployment while keeping the system compact during transport.
Solution Approach 2:
The hose is pre-wound on the reel in the correct configuration before deployment. The reel is pre-positioned inside the transport bag with the hose ready for immediate unwinding. This preliminary preparation eliminates the time-consuming manual assembly of hose reserves at the incident site.
2Reliability
If the hose line is filled with water and pressurized after laying, then water supply is enabled, but the hose flaps around causing knots or injuries
Solution Approach 1:
The hose reserve is kept contained within the transport bag before pressurization. The bag acts as a restraining structure that prevents the hose from flapping around or forming knots when water pressure is applied. This preliminary containment counteracts the harmful flapping effect before it can cause damage or injury.
Solution Approach 2:
The transport bag serves as a flexible shell that contains and stabilizes the hose reserve. The flexible material of the bag allows it to conform to the hose while providing sufficient restraint to prevent uncontrolled movement and knotting during pressurization.
3Ease of operation
If the hose reserve is laid out in places like stairwells, then access is provided, but it poses a tripping hazard
Solution Approach 1:
The hose reserve is nested within the transport bag rather than being laid out loosely in stairwells or corridors. The bag contains the hose in an organized manner that eliminates tripping hazards while still allowing firefighters to access the hose by opening the bag or unwinding it from the reel as needed.
4Ease of operation
If hose couplings are used to connect hose sections, then hose lines can be assembled, but couplings become wedged against edges making it impossible to pull the hose line through
Solution Approach 1:
The hose is pre-connected to the reel in a controlled environment before deployment. This preliminary connection ensures proper coupling alignment and eliminates the risk of couplings becoming wedged against edges during the deployment process. The hose is pulled from the reel in a controlled manner that prevents coupling misalignment.
Data Source
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AI summary
Disclosed is a method for extinguishing a fire, comprising the following steps: a dimensionally stable hose and a reel comprising a central water connection that is rotatable relative to the reel are provided, the hose being wound on the reel; the dimensionally stable hose is designed in such a way as to have a second connection; furthermore, a transport device is provided in which the reel is rotatably mounted in order for the hose to be unwound; the hose is connected to the water supply conduit; the hose is unwound from the reel only by the length required to reach and extinguish the fire. The disclosed method dispenses with the time-consuming installing of hoses in bays and eliminates the associated risk of tripping over the hose. In the disclosed method, the wound dimensionally stable hose forms the hose supply. Moreover, the system can be filled with water and pressurized without any preparation at any time. The hose supply can remain in the bag. Also disclosed is a corresponding device, which can additionally be used as a rescue device.