Auxiliary Drain Valve Float Control for Freeze-Prone Sprinklers
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Solution Overview
Problem
Existing auxiliary drains in fire sprinkler systems are manually operated, prone to damage, and susceptible to freezing, which can lead to unintended activation and flooding, especially when positioned in exposed areas like parking garages.
Innovation Solution
An automated auxiliary drain system with a float mechanism and temperature-sensitive spring to control water flow, combined with an anti-flood valve to prevent system activation during damage or flooding, ensuring automated condensate removal and pressure stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual auxiliary drains are used in exposed areas, then drainage function is provided, but the system is prone to damage and freezing
Solution Approach 1:
The patent implements an automated auxiliary drain system that self-regulates water drainage without manual intervention. The float mechanism automatically opens the drain valve when water reaches a certain level and closes it when the level drops, eliminating the need for manual operation while improving reliability through consistent automated control.
Solution Approach 2:
The patent replaces manual mechanical operation with an automated mechanical control system using a float and valve mechanism. This substitution eliminates human error and manual intervention, providing continuous reliable operation while maintaining the drainage function.
2Ease of repair
If auxiliary drains are positioned in accessible locations, then maintenance is easier, but they are more susceptible to damage and freezing
Solution Approach 1:
The patent converts the potential harm of exposed positioning into a benefit by implementing automated control that prevents freezing damage. The system uses the exposed location for easy maintenance access while the automated float-controlled valve prevents water accumulation that could freeze, transforming the vulnerability into an advantage.
Solution Approach 2:
The patent applies preliminary action by automatically draining water before freezing conditions can cause damage. The float mechanism proactively removes water when it reaches the drain, preventing accumulation that would lead to freezing, rather than reacting after damage occurs.
3Reliability
If automated drain systems are implemented, then operation reliability is improved, but device complexity increases
Solution Approach 1:
The patent extracts only the essential automated control function needed for reliable operation - a simple float and valve mechanism - without implementing complex electronic or computational systems. This extraction approach provides automated reliability while minimizing added complexity by using only the necessary mechanical components.
Solution Approach 2:
The patent uses parameter changes in the float mechanism - specifically changes in water level position - to automatically control the valve state. This simple parameter-based control provides reliable automated operation without complex systems, as the float naturally responds to water level changes to open or close the drain valve.
4Quantity of substance
If water is allowed to accumulate in the drain, then drainage capacity is maintained, but freezing damage occurs
Solution Approach 1:
The patent implements periodic drainage action through the float-controlled valve mechanism. Water accumulates in the drain until it reaches the float level, then the valve opens to drain the water, and closes when the level drops. This periodic cycle maintains necessary water quantity for drainage capacity while preventing accumulation that would lead to freezing damage.
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 provides automated condensate drainage, reduces freezing damage, and prevents unintended system activation, maintaining pressure stability and effective firefighting capabilities.
Implementation Method 1
a float within the drain housing, the float alternatively sealing and unsealing an exhaust port in the housing
Implementation Method 2
a temperature sensitive spring attached to the float, the temperature sensitive spring providing a first biasing force on the float at a first temperature and a second biasing force on the float at a second temperature
Data Source
AI summary
An automated auxiliary drain valve for a sprinkler system which works both to automate collection and release of condensate through the auxiliary drain, and can provide an automatic shutoff in the event that the auxiliary drain reservoir is damaged. The automated functioning of the automatic drain is also stopped should the sprinkler system be activated elsewhere.