Alarm Valve Station With Electrical Delay for False Alarm Prevention
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Solution Overview
Problem
Existing fire alarm systems using hydraulic delay containers for pressure variations in extinguishing fluid supply suffer from predefined delay duration, high production and maintenance costs, spatial constraints, and limited construction flexibility due to the need for specific line arrangements.
Innovation Solution
An electrical alarm delay device is used downstream of the pressure sensor to control the delay duration, allowing for adjustable and space-efficient alarm delay without the limitations of hydraulic systems, with manual and remote setting options and independent components for easier maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hydraulic delay container is used to prevent false alarms from pressure variations, then false alarm prevention is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent replaces the hydraulic delay container with an electrical alarm delay device that receives signals from the pressure sensor and introduces a time delay electronically. This substitution eliminates the need for complex hydraulic components while maintaining the false alarm prevention function through electrical signal processing.
Solution Approach 2:
The electrical alarm delay device acts as an intermediary between the pressure sensor and the alarm output. It receives the alarm signal from the pressure sensor, processes it with a time delay function, and then outputs the delayed signal to the alarm system, thereby preventing false alarms without requiring hydraulic delay containers.
2Reliability
If a hydraulic delay container is used for pressure variations, then false alarm prevention is improved, but installation space increases
Solution Approach 1:
The patent replaces the hydraulic delay container with an electrical alarm delay device that receives signals from the pressure sensor and introduces a time delay electronically. This substitution eliminates the need for complex hydraulic components while maintaining the false alarm prevention function through electrical signal processing.
3Reliability
If a hydraulic delay container is used, then false alarm prevention is improved, but maintenance costs increase
Solution Approach 1:
The patent replaces the hydraulic delay container with an electrical alarm delay device that receives signals from the pressure sensor and introduces a time delay electronically. This substitution eliminates the need for complex hydraulic components while maintaining the false alarm prevention function through electrical signal processing.
4Reliability
If a hydraulic delay container is used, then false alarm prevention is improved, but adaptability decreases due to predefined delay duration
Solution Approach 1:
The electrical alarm delay device allows for dynamic adjustment of the delay duration through electrical control mechanisms, enabling the delay time to be modified based on different operational requirements. This provides adaptability compared to the fixed delay duration of hydraulic delay containers.
Solution Approach 2:
The patent enables changeable delay parameters through electrical control, allowing the delay duration to be adjusted by modifying electrical circuit parameters such as resistor values or control signals. This provides flexibility in setting the delay time according to specific application requirements.
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 electrical alarm delay device provides adjustable delay times, reduces maintenance costs, and minimizes space requirements while enhancing construction flexibility and operational convenience.
Implementation Method 1
a pressure sensor which is in fluid-communication with the alarm valve and which is configured to detecting a change in pressure and for converting this into an electrical alarm signal
Implementation Method 2
connect hydraulic delay containers upstream of the pressure sensors. In the event of a rise in pressure, the hydraulic delay container is filled with extinguishing fluid first, before the pressure sensor is able to detect a change in pressure
Data Source
AI summary
The invention relates to an alarm valve station for a fire alarm system, having an alarm valve with an extinguishing fluid inlet and an extinguishing fluid outlet, wherein the alarm valve is set up for selectively releasing or blocking the extinguishing fluid flow between the extinguishing fluid inlet and the extinguishing fluid outlet, having a pressure sensor which is in a fluid-communication with the alarm valve and which is configured to detect a change in pressure and for converting this into an electrical alarm signal, and having an alarm delay device for delaying the alarm signal. It is proposed according to the invention that the alarm delay device is designed as an electrical alarm delay device and is connected in signal-communication with the pressure sensor.