Vehicle Foam Mixing System with Fuzzy Control
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Solution Overview
Problem
Current fire-fighting foam mixing systems face challenges in precisely controlling the mixing proportion under large flow conditions, leading to low foaming efficiency and system complexity, with existing solutions failing to address flow fluctuations and energy consumption effectively.
Innovation Solution
A vehicle-mounted large-flow fire-fighting foam fluid mixing system utilizing a single-chip microcomputer-based fuzzy control system to real-time regulate the operating conditions, incorporating a supply kit, mixing kit, and pipeline kit, with a foam generating device and auxiliary gas supply, to achieve precise control and improved foaming efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a balanced foam proportion mixing device is used to dynamically adjust foam liquid flow, then mixing proportion precision is improved, but device complexity increases due to multiple valves and control systems
Solution Approach 1:
The patent extracts and eliminates unnecessary components from the traditional balanced mixing device. By removing the balance valve and other redundant control elements, the system achieves precise mixing proportion control through a simplified architecture that relies on direct proportioning between fire water and foam liquid flows without complex dynamic adjustment mechanisms.
Solution Approach 2:
The simplified mixing device enables the system to self-regulate mixing proportions through inherent flow relationships. The foam liquid pump and fire water pump work in coordination where the foam liquid flow automatically proportions to the fire water flow without requiring external balance control mechanisms, making the system self-sufficient and easier to operate.
2Productivity
If foam liquid flow is increased to achieve large-flow fire extinguishing, then fire extinguishing coverage is improved, but energy consumption increases due to higher pumping power requirements
Solution Approach 1:
The patent changes the operating parameters of the foam liquid pump to optimize energy efficiency. By adjusting the pump speed and operating point to match actual fire fighting requirements rather than maintaining constant high flow, the system achieves large-flow capability when needed while reducing energy consumption during normal operation through variable speed control.
3Ease of operation
If a simplified mixing device is used to reduce system complexity, then ease of operation is improved, but control precision over mixing proportion may deteriorate
Solution Approach 1:
The patent replaces complex mechanical balance control systems with a more straightforward pump-based proportioning system. The mixing proportion control is achieved through coordinated pump operations and flow relationships rather than mechanical balance valves and linkages, simplifying the mechanical system while maintaining control precision through modern pump control technology.
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 optimizes fluid flow proportion control, reduces energy consumption, and enhances foaming efficiency, enabling stable operation under fluctuating conditions, thus meeting the demands of fire extinguishing operations with improved reliability and efficiency.
Implementation Method 1
The air drainage tube is configured to introduce air into the foam generating device, to improve the foaming expansion and foaming efficiency
Implementation Method 2
water and foam liquid are fully mixed to form a foamed foam mixture in a foam foaming device
Implementation Method 3
the foam mixture is used to cover the surface of comburent to isolate the comburent from the air
Data Source
AI summary
The present invention discloses a vehicle-mounted large-flow fire-fighting foam fluid mixing system, including a supply kit, a mixing kit, a control kit, and a pipeline kit. The supply kit includes an auxiliary gas supply device, a fire pump, an integrated foam pump, a fire pump main motor, and a coupling. The mixing kit includes a fire monitor interface, a foam generating device, and a fluid mixing device. The control kit includes a foam mixing proportion single-chip microcomputer control system, an alarm module, a power module, an auxiliary air compressor switch module, a frequency converter, and a central control display screen. The pipeline kit includes an air drainage tube, a fire hose, a foam liquid pipe, and a pipeline valve. For the problems of flow fluctuation and low foam foaming efficiency, the present invention optimizes the design and adopts a new control policy, thereby implementing precise mixing under the large-flow condition.