Cutting Torch Gas Control With Integrated Ignition and Cooling
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Solution Overview
Problem
Current automated machine cutting torch systems require significant operator intervention for setup and adjustments, leading to inefficiencies, increased maintenance, and potential safety issues due to manual handling and lack of precise control over gas parameters and nozzle alignment.
Innovation Solution
A cutting torch system with integrated ignition and cleaning modes, featuring an ignition mixer, fuel gas shut-off valve, and sensors for measuring gas pressure and flow rates, along with an electronic identifier for nozzle data, enabling automated adjustments and reduced manual labor through a control system that manages gas conditions and nozzle operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment of oxygen and fuel gas pressure and flow rates is used during start-up and operation, then the cutting torch can be operated, but significant operator skill and intervention are required, leading to inefficiency and inconsistency
Solution Approach 1:
The control system automatically adjusts oxygen and fuel gas pressure and flow rates based on sensor feedback, enabling the system to self-regulate without operator intervention. The electronic identifier on nozzles allows automatic recognition and configuration, making the system serve itself rather than requiring manual setup by operators.
Solution Approach 2:
Manual mechanical adjustment of valves and parameters is replaced by an automated control system with electronic sensors and actuators. The system uses electronic control to replace the mechanical hand-adjustment process, achieving faster and more consistent parameter setting.
2Ease of repair
If nozzles are changed manually due to maintenance or setup changes, then nozzle replacement is possible, but the process requires cooling down, special wrenches, and complete re-setup, leading to downtime and loss of critical parameter information
Solution Approach 1:
Critical parameters such as gas pressure and flow rate are continuously monitored by sensors during operation. This feedback is stored and can be automatically restored after nozzle changes, eliminating the need for complete re-setup. The electronic identifier on nozzles provides feedback about nozzle type and parameters to the control system.
Solution Approach 2:
Critical operating parameters are saved and stored in memory before nozzle changes occur. This preliminary action allows parameters to be automatically restored after nozzle replacement, avoiding the need to wait for cooling and perform complete re-setup procedures.
3Reliability
If external ignition devices are used, then ignition can be achieved, but sufficient free space is required, additional fuel gas supply is needed, and the device is frequently damaged by the cutting process
Solution Approach 1:
The ignition device is integrated into the cutting torch body rather than being a separate external component. The ignition system shares the same fuel gas supply and structural housing as the cutting torch, eliminating the need for separate fuel gas lines and reducing the number of parts that can be damaged during operation.
Solution Approach 2:
The fuel gas supply system serves dual purposes: it provides fuel for both the ignition process and the cutting operation. The same fuel gas channel and control mechanisms are used for both functions, reducing system complexity and the number of components that require maintenance.
4Measurement precision
If cutting oxygen pressure is measured at the pressure regulator or proportional valve, then pressure monitoring is possible, but the measurement is not sufficiently accurate due to pressure drop in pipelines and hoses
Solution Approach 1:
A pressure sensor is installed as an intermediary component directly in the cutting oxygen line at the torch. This intermediary measurement point provides accurate local pressure data without being affected by pressure drops in the supply lines, giving true representation of the actual cutting oxygen pressure at the nozzle.
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 provides reliable, efficient, and safe flame ignition, reduces operator dependency, minimizes maintenance needs, and improves cut quality by automating gas parameter adjustments and nozzle management, leading to increased efficiency and cost savings.
Implementation Method 1
an ignition mixer (7) arranged in the body (2), a fuel gas shut-off valve (8) arranged upstream of the ignition mixer (7)
Implementation Method 2
The channel (4) is also used for ignition gas. Both heating gas and ignition gas consist of a mixture of heating oxygen and fuel gas, however in different amounts and proportions
Implementation Method 3
a cutting oxygen channel (4), a heating oxygen channel (5) and a fuel gas channel (6) which are connected to an inlet side of the body (2)
Data Source
AI summary
A cutting torch system comprises a cutting torch and a control system. The cutting torch includes a cutting oxygen channel for supplying cutting oxygen, a heating oxygen channel for supplying heating oxygen, a fuel gas channel for supplying fuel gas, an ignition mixer configured to selectively generate ignition gas from the heating oxygen and the fuel gas, and at least one sensor adapted for measuring a pressure and/or flow rate in one of the channels. The control system is adapted to maintain a temperature of the cutting torch to allow operation of the at least one sensor by adjusting a flow rate and/or a pressure of the gasses supplied to the cutting torch and/or by switching the cutting torch between an ignition mode and a cleaning and cooling mode.