Double Interlock Pre-Action Sprinkler Head Integration
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Solution Overview
Problem
Current sprinkler systems require separate installations for wet and dry pipe systems, leading to increased costs, complex maintenance, and duplicated fire protection efforts for protecting special rooms, which is inefficient and costly.
Innovation Solution
A double interlock pre-action sprinkler head that integrates a dedicated electrically actuatable valve and a heat-sensitive valve, allowing fire suppressant fluid to flow only when both a fire detection event and a temperature threshold are met, enabling dry pipe protection within a wet pipe system framework.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate dry pipe and wet pipe systems are installed for special rooms, then fire protection reliability is improved, but device complexity and installation cost increase
Solution Approach 1:
The patent combines the functions of separate dry pipe and wet pipe systems into a single integrated sprinkler head assembly. The pre-action sprinkler head incorporates both a heat-sensitive element (for dry pipe functionality) and an electrically actuatable valve (for wet pipe functionality), allowing it to operate effectively within a wet pipe system while providing dry pipe protection for special rooms. This merging eliminates the need for separate system installations and reduces overall system complexity.
Solution Approach 2:
The pre-action sprinkler head is designed to perform multiple functions: it can detect heat conditions (like a traditional sprinkler), respond to electrical signals from fire detection systems, control water flow through integrated valves, and provide both dry pipe and wet pipe protection modes. This multi-functionality allows a single device to replace what previously required separate specialized systems, reducing device complexity while maintaining fire protection reliability.
2Reliability
If separate dry pipe and wet pipe systems are installed for special rooms, then fire protection coverage is improved, but maintenance complexity increases
Solution Approach 1:
By merging the protective functions of separate dry pipe and wet pipe systems into a single pre-action sprinkler head, the patent reduces the number of system components that require maintenance. Instead of maintaining separate dry pipe and wet pipe systems for special rooms, the integrated head operates within the existing wet pipe system, simplifying maintenance procedures and reducing maintenance complexity while preserving comprehensive fire protection coverage.
Solution Approach 2:
The pre-action sprinkler head incorporates automatic detection and response mechanisms that reduce the need for manual intervention and complex maintenance. The heat-sensitive elements and electrically actuatable valves are designed to automatically respond to fire conditions, and the integrated design allows for easier monitoring and maintenance through the existing wet pipe system infrastructure, rather than requiring specialized maintenance procedures for separate dry pipe systems.
3Ease of manufacture
If pre-action sprinkler head is integrated into wet pipe system, then installation cost is reduced, but system reliability may worsen
Solution Approach 1:
The patent integrates pre-action functionality into the sprinkler head itself rather than requiring separate pre-action valves and control systems. By combining the heat-sensitive element, electrically actuatable valve, and sprinkler body into a single integrated assembly, the system achieves cost savings from simplified installation while maintaining reliability through the coordinated operation of multiple protective mechanisms within the unified design.
Solution Approach 2:
The pre-action sprinkler head incorporates preliminary detection and response mechanisms that enhance system reliability. The heat-sensitive elements and electrically actuatable valves provide advance detection and controlled water release, ensuring that water is discharged only when fire conditions are confirmed. This preliminary action mechanism maintains high reliability by preventing false discharges while ensuring rapid response when needed, all within the integrated design that reduces installation costs.
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
This solution provides effective dry pipe fire protection for specific areas while being fully integratable into existing sprinkler systems, reducing the need for separate zones and lowering maintenance and installation costs by ensuring water is only released when necessary, thus minimizing property damage and system failures.
Implementation Method 1
the heat-sensitive valve actuating from the closed state to the open state when ambient temperature at the heat-sensitive valve is at or above a predefined temperature
Implementation Method 2
a dedicated electrically actuatable valve connected to the pipe and configured to prevent fire suppressant fluid in sprinkler system piping from entering the pipe through the inlet, the electrically actuatable valve actuatable in response to a signal from a fire detector
Data Source
AI summary
A sprinkler system comprises at least one double interlock pre-action head that has a conduit having an inlet and outlet to permit flow of fire suppressant fluid through the conduit. A dedicated electrically actuatable valve is connected to the conduit to prevent fire suppressant fluid in sprinkler system piping from entering the conduit. The electrically actuatable valve opens in response to a signal from a fire detector to permit fire suppressant fluid to flow into the conduit. A heat-sensitive valve is connected to the conduit and opens to permit fire suppressant fluid to exit the conduit when ambient temperature at the heat-sensitive valve is at or above a predefined temperature. The double interlock pre-action head provides a dry pipe solution for a single room while being fully integratable into any building-wide sprinkler system, including wet pipe systems.