High-Pressure Gas Fire Extinguishing Control Valve
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Solution Overview
Problem
Existing high-pressure gas fire extinguishing systems face challenges in ensuring precise pressure reduction of extinguishing gas from high-pressure cylinders to the desired low pressure in the extinguishing line, with previous devices being material-intensive and unsuitable for high-pressure applications, leading to potential pipe system damage from excessive pressure.
Innovation Solution
A control valve design where the high pressure of the compressed gas tank does not exert a displacement force component on the control piston, allowing precise regulation of outlet pressure independently of the tank pressure, eliminating the need for additional reducing devices and software calculations, and ensuring the pressure in the extinguishing line is dynamically regulated within the control valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional pressure reducing devices are used with multiple reduction stages, then the pressure can be reduced from high pressure to low pressure, but the device becomes material-intensive and complex
Solution Approach 1:
The invention extracts and eliminates the need for multiple pressure reduction stages and associated high-pressure components. By designing a control valve where the control piston is not subjected to full tank pressure, the patent removes the complexity of multi-stage reduction devices, high-pressure connecting parts, and high-pressure hoses while achieving the desired pressure reduction precision.
Solution Approach 2:
The invention introduces a control pressure as an intermediary mechanism. Instead of directly reducing high tank pressure through multiple stages, a control pressure is applied to the control piston to indirectly regulate the outlet pressure. This mediator approach simplifies the device structure while maintaining precise pressure control.
2Ease of operation
If control gas pressure is applied to open a valve against high cylinder pressure, then the valve can be controlled, but the construction is only suitable for low pressure applications
Solution Approach 1:
The invention applies the counterweight principle by balancing the control pressure against the tank pressure on the control piston. The control piston is designed with equal effective areas on both sides, creating a force equilibrium where the control pressure only needs to overcome the pressure difference, not the full tank pressure. This enables the valve to be controlled effectively even at high pressures of 150 to 300 bar.
3Manufacturing precision
If additional reducing devices and high-pressure components are used, then pressure reduction can be achieved, but the system becomes material-intensive and installation complex
Solution Approach 1:
The invention merges the pressure reduction function directly into the control valve design. Instead of using separate additional reducing devices, high-pressure connecting parts, and high-pressure hoses, the control valve itself performs the pressure reduction by selectively opening and closing the outlet based on control pressure. This integration eliminates unnecessary components and reduces material intensity while maintaining pressure regulation accuracy.
4Productivity
If conventional pressure reducing devices are used, then pressure reduction is possible, but precise outlet pressure regulation cannot be ensured
Solution Approach 1:
The invention implements a feedback mechanism where the control pressure continuously regulates the outlet pressure. The control piston responds to changes in outlet pressure by adjusting its position, which in turn adjusts the valve opening to maintain the desired pressure. This feedback control ensures precise outlet pressure regulation while maintaining the pressure reduction capability.
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
Enables precise and safe pressure reduction of extinguishing gas to the desired level, simplifies system installation, and prevents pipe system damage by dynamically regulating pressure, reducing material intensity and eliminating the need for complex software calculations.
Implementation Method 1
a control pressure chamber (16) is provided in which a control pressure is applied to a control piston (13)
Implementation Method 2
the pressure of the extinguishing gas is between the gas cylinder and an extinguishing line is reduced
Data Source
Figure 1
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Figure 6
AI summary
The invention relates to a fire-extinguishing system of the high-pressure gas type, in which the gaseous extinguishing agent is stored under high pressure in at least one high-pressure gas bottle (1). The bottle valve operates, with interposition of a container attachment for the extinguishing gas, as a pressure-controlled, reducing and self-regulating control valve (3). By means of a predetermined control pressure which corresponds to the pressure in the extinguishing line system (2), the pressure of the extinguishing gas is reduced from, for example, 150 to 300 bar within the control valve to, for example, 60 bar. This makes it possible to dispense with all the high-pressure components used to date between the bottle valve and the extinguishing line system. Furthermore, a computational software is no longer required.