Fuel Shutoff Valve Hardwire Safety Control for Easier Troubleshooting
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Solution Overview
Problem
Existing safety control systems for fuel-consuming apparatuses rely on software-based approaches, making them complex and difficult to troubleshoot, especially during safety testing, as they obscure the linkage between specific functions and parts of the control system.
Innovation Solution
A hardwire-based safety control system utilizing electro-mechanical switches that directly respond to environmental conditions, simplifying the control of a fuel safety shutoff valve by activating or deactivating the electrical connection based on preset requirements for air flow, pressure, and temperature, thereby facilitating easier troubleshooting and compliance with industry safety tests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a software-based control system is used to detect safety hazards and provide control feedback signals, then the control mechanism can process complex environmental conditions, but the system complexity increases and troubleshooting becomes difficult
Solution Approach 1:
The control system is segmented into independent functional modules: environmental condition sensors (flow, pressure, temperature), a controller, and a fuel safety shutoff valve. Each module performs a specific function and can be independently tested and troubleshooted, reducing overall system complexity while maintaining comprehensive safety monitoring capability.
Solution Approach 2:
The controller acts as an intermediary between the environmental condition sensors and the fuel safety shutoff valve. It receives signals from sensors, processes safety logic, and activates the shutoff valve when hazards are detected, simplifying the control architecture while maintaining adaptability to various safety scenarios.
2Reliability
If a software-based control system is used, then comprehensive safety monitoring can be achieved, but identifying failed parts becomes difficult
Solution Approach 1:
The system incorporates visual indicators (such as LED lights or display signals) that change state to indicate the operational status of different components. When a sensor or component fails, the corresponding visual indicator provides immediate feedback, making it easy to identify failed parts without complex diagnostic software.
Solution Approach 2:
By dividing the system into discrete, independently testable modules with clear signal paths, the patent enables systematic troubleshooting. Each sensor and control element can be tested individually, and the segmented architecture allows technicians to isolate failures to specific components rather than searching through integrated software code.
3Reliability
If existing safety control mechanisms are used, then basic safety functions can be provided, but compliance with industry safety tests becomes challenging
Solution Approach 1:
The control system incorporates dynamic response capabilities where the controller can immediately activate the fuel safety shutoff valve upon detecting hazardous conditions. The system dynamically adjusts its state based on real-time environmental conditions, ensuring compliance with safety response time requirements while maintaining a relatively simple overall architecture.
Solution Approach 2:
The system implements continuous feedback loops where environmental condition sensors monitor the operating environment, the controller processes the sensor signals against safety criteria, and the fuel safety shutoff valve receives control feedback signals to maintain safe operation. This structured feedback mechanism simplifies compliance with industry safety tests by providing clear, traceable safety logic.
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 hardwire-based system provides a more reliable and intuitive means of controlling fuel safety shutoff valves, enhancing troubleshooting efficiency and ensuring safe operation by directly linking environmental conditions to switch operations, thus improving safety and compliance in fuel-consuming apparatuses.
Implementation Method 1
a flow switch unit includes a first electro-mechanical switch configured to be switched on or switched off based on whether an air flow rate sensed at a first location of the fuel-consuming apparatus meets a first preset requirement
Implementation Method 2
a pressure switch unit includes a second electro-mechanical switch configured to be switched on or switched off based on whether a differential pressure between two separated locations of the fuel-consuming apparatus meets a second preset requirement
Implementation Method 3
an over-temperature switch unit includes a third electro-mechanical switch configured to be switched on or switched off based on whether a temperature sensed at a third location of the fuel-consuming apparatus meets a third preset requirement
Implementation Method 4
the one or more switch units are implemented with one or more electro-mechanical switches
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A safety control system for a fuel-consuming apparatus includes a switching assembly. The switching assembly includes a first end electrically connected to a power source node, a second end electrically connected to an input power node of a fuel safety shutoff valve of the fuel -consuming apparatus, and one or more switch units serially connected between the first and second ends. Each of the switch units is configured to be switched on or off based on a corresponding one of one or more environmental conditions of the fuel-consuming apparatus. An electrical connection path between the first and second ends is deactivated upon at least one of the one or more switch units being switched off to stop supplying of fuel into the fuel-consuming apparatus.