Blowtorch Head Inner-Outer Tube Nozzle for Flashback Prevention
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Solution Overview
Problem
Existing blowtorch designs suffer from gas explosions and inefficient combustion due to reverse flow of fuel and air mixtures, which can cause flame flashback and safety hazards.
Innovation Solution
A torch head design featuring a nozzle system with a suction seat, inner and outer tubes, and channels that create a negative pressure condition to prevent reverse flow of fuel and air mixtures, enhancing combustion efficiency and preventing gas explosions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the gas switch valve is closed to stop gas flow, then gas consumption is reduced, but gas remaining in the barrel may flow backward causing flame flashback and gas explosion
Solution Approach 1:
A check valve is introduced as an intermediary component between the barrel and the body. This check valve allows gas to flow forward from the body to the barrel but prevents backward flow from the barrel to the body, thus eliminating the risk of flame flashback and gas explosion while maintaining energy efficiency
Solution Approach 2:
The harmful backward flow of gas is extracted and eliminated from the system by using the check valve to block the reverse path, allowing the system to safely shut off gas supply without risking explosion
2Reliability
If the nozzle system creates negative pressure to prevent reverse flow, then combustion safety is improved, but device complexity increases due to additional channels and tubes
Solution Approach 1:
The nozzle system is segmented into multiple functional components: an inner tube for fuel delivery, an outer tube for air mixing, and side channels for controlled air intake. This segmentation allows each component to perform its specific function efficiently while maintaining overall system safety
Solution Approach 2:
The inner tube is nested within the outer tube, creating a compact multi-functional nozzle structure. The side channels are integrated into the outer tube wall, allowing air to be drawn in without requiring separate external components, thus reducing overall device complexity
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 design improves combustion efficiency and prevents gas explosions by ensuring air is drawn into the system, maintaining a stable flame and enhancing heating temperatures.
Implementation Method 1
the mixtures of air and fuel in the second outer channel are ignited, and so a negative pressure condition is created in the nozzle system
Implementation Method 2
a negative pressure condition is created in the nozzle system, which cause air outside the torch head to be able to be sucked into the at least one side channel
Implementation Method 3
The first and the second outer channels are passages for mixtures of air and fuel. When the torch head produces a flame, the mixtures of air and fuel in the second outer channel are ignited
Data Source
AI summary
A torch head includes a head body portion and a nozzle system inserted into the head body portion. The nozzle system includes a suction seat, an inner tube, and an outer tube. The suction seat includes a first outer channel extending longitudinally and at least one side channel extending radially. The first outer channel and the at least one side channel are not connected with each other. The inner and the outer tubes are connected to the second end of the suction seat. The outer tube circumferentially surrounds the inner tube. The first outer channel is opened to and communicated with the outer tube. The at least one side channel is opened to and communicated with the inner tube. The inner tube has an end opened to and communicated with the outer tube.