Oxygen Pipe Hazard Indicator Using Pressure-Driven Warning Pins
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Solution Overview
Problem
Existing gas-carrying line safety devices do not effectively alert operators to potential hazards, such as gas ignition risks, especially for less attentive personnel, as they lack clear indicators of valve responses during dangerous situations.
Innovation Solution
A display device integrated into oxygen gas lines with a heat sensor and outlet valve, featuring a thermally unstable cap that melts to trigger the valve closure, and a pin mechanism that extends under gas pressure to visually alert operators, potentially triggering an optical or acoustic signaling system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a safety valve with heat sensor and outlet valve is integrated into the oxygen gas line, then the reliability of hazard detection is improved, but the loss of information about valve response deteriorates because operators are not clearly alerted to the hazardous situation
Solution Approach 1:
The patent implements a visual feedback mechanism through a pin that extends from the valve housing when the outlet valve closes. This mechanical feedback system provides immediate, clear visual information to operators about the valve's closed state, directly addressing the information loss problem while maintaining the reliable hazard detection function of the heat sensor and outlet valve
2Ease of operation
If a complex electrical or electronic signaling system is added to indicate valve closure, then the ease of operation for operators is improved, but the device complexity increases
Solution Approach 1:
The patent employs a self-service mechanical indication system where the closing of the outlet valve itself generates the visual signal through the extending pin. The gas pressure differential automatically drives the pin outward without requiring external power sources, control systems, or additional actuators, thereby providing clear operator awareness while avoiding increased device complexity
Solution Approach 2:
The patent utilizes pneumatic principles by employing the residual oxygen gas pressure in the cavity to drive the pin outward when the outlet valve closes. This pneumatic mechanism provides a simple, reliable visual indication system that avoids complex electrical or electronic components while effectively communicating valve closure status to operators
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 solution provides a clear and reliable visual indication of valve closure, ensuring operators are immediately aware of hazardous situations without requiring additional electrical or electronic measures, thereby enhancing safety by automatically extending a pin or activating a signaling system.
Implementation Method 1
The previously mentioned temperature sensor is triggered when a certain temperature is exceeded. The piston then moves through, closing the outlet valve. To precisely control this process and facilitate the activation of the indicator device, the bowl-shaped outlet valve has a piston at its base that is designed to break upon activation
Implementation Method 2
Because the opening portion below the pin is connected to the cavity under residual oxygen gas pressure when the outlet valve moves (i.e., closes), this allows the opening portion to act on the pin. In other words, the pin can be moved by the gas pressure in such a way that the operator must immediately notice this
Data Source
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Figure 5
AI summary
When using oxygen gas pipes 3, situations can arise, particularly due to slag backflow and similar hazards, where the operating employee must initiate safety measures. Slag backflow preventers are known to stop the gas flow in such cases by melting a cap 35 of a temperature sensor 5. The activation of this outlet valve 6 of the slag backflow preventer, for example, is indicated by the fact that the inlet pressure of the oxygen gas 4 is used to push pins 21 located in the wall 19 of the oxygen gas pipe 3 beyond the outer surface 27 of the oxygen gas pipe 3, so that they are clearly visible as a warning signal. The movement of the pins 21 can be used to activate further signaling devices 30 to indicate this movement visually and/or audibly.