Automated Hot Smoke Testing With Controllable Fire and Smoke Output
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Solution Overview
Problem
Current on-site hot smoke testing methods for subway disaster prevention systems, such as cold smoke testing and scale-reducing simulation techniques, are inadequate as they lack comprehensive testing, have limited test indicators, and fail to accurately reflect actual fire disaster scenarios, particularly due to manual control and uncontrollable smoke generation.
Innovation Solution
An automatic control type hot smoke testing system is introduced, comprising a fire source system with liquid fuel atomizing jet burners, a smoke generation system using servo motors and silicon carbide igniters, and a control system with an embedded computing platform and touch screen for precise control and modular process management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual smoke generation using smoke cakes is used, then the system is simple to operate, but the smoke generation speed is uncontrollable and the testing accuracy is poor
Solution Approach 1:
The patent replaces manual mechanical operations with automated control systems. The smoke generation process is controlled by a microcomputer that automatically controls the smoke generator's operation, replacing manual lighting and replacement of smoke cakes with automated timing and control mechanisms, thereby improving testing accuracy while maintaining operational simplicity
Solution Approach 2:
The system implements self-service through automatic timing and control mechanisms. The microcomputer automatically controls the duration and intensity of smoke generation without requiring continuous manual intervention, allowing the system to regulate its own operation based on pre-set parameters, thus improving precision without proportionally increasing complexity
2Adaptability or versatility
If fixed fire source with pool fire configuration is used, then the device structure is simple, but the combustion time is uncontrollable and the adaptability is poor
Solution Approach 1:
The fire source system transitions from a static pool fire configuration to a dynamic spray fire system. The liquid fuel spray burners can adjust fuel flow rate and spray patterns dynamically, allowing controllable combustion time and intensity. The system can be configured with multiple burners that can be individually controlled, providing adaptability while managing complexity through modular design
Solution Approach 2:
The system changes the operational parameters of the fire source by controlling fuel flow rate, spray pressure, and burner activation sequences through the microcomputer. This allows precise control of combustion time and heat release rate without fundamentally changing the basic burner structure, achieving adaptability while keeping the device relatively simple
3Reliability
If continuous smoke generation is used, then the smoke volume is sufficient, but the smoke cannot be stopped and the safety is poor
Solution Approach 1:
The system implements feedback control through the microcomputer that monitors smoke generation status and automatically adjusts or stops smoke production based on pre-set time parameters and detection signals. This allows the system to maintain sufficient smoke volume for effective testing while ensuring automatic cessation at appropriate times, thereby improving safety without compromising testing effectiveness
Solution Approach 2:
The smoke generation operates in controlled periodic cycles rather than continuously. The microcomputer controls the smoke generator to operate for specific time intervals followed by automatic shutdown or reduction, creating periodic action that ensures sufficient smoke is generated during active periods while maintaining safety through automatic stoppage, thus balancing productivity and safety
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 enables controlled and efficient smoke generation, improving the accuracy and safety of hot smoke testing by automating the process, allowing for real-time control of smoke generation speed and flame height, reducing manual intervention, and enhancing the simulation of real fire scenarios.
Implementation Method 1
liquid fuel atomizing jet burners
Implementation Method 2
the air duct extends into the air tank and is equipped with an air inlet; the fuel control tank includes several fuel control valves and a fuel distribution box
Implementation Method 3
smoke generation system using servo motors and silicon carbide igniters
Data Source
AI summary
The present disclosure relates to an automatic control type hot smoke testing system which includes a fire source system, a smoke generation system and a control system. The fire source system is used for generating fire source and includes a first tank and several liquid fuel atomizing jet burners, wherein the first tank includes an air tank which is used for providing air and a fuel control tank which is used for controlling valves, distributing fuel and inspecting flame of the burners. The smoke generation system is used for generating smoke and includes a second tank, a smoke outlet pipe, smoke cake clamps and smoke cake turntables. Smoke cakes are initially placed in the smoke cake clamps, then moved to an ignition position one by one by for ignition, and finally rotated to through hole positions of a smoke generation box to fall into the smoke generation box by the servo motor. The control system is used for controlling the fire source system and the smoking generation system. The present disclosure overcomes the defects of the traditional manual hot smoke test, and realizes the accurate control of the smoke generation speed, the fire source power and the burning time, which has the characteristics of accuracy, light weight, automation and convenient disassembly and transportation.