Water Column Supervisory Switch Probe for Dry Pipe Valve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dry sprinkler and pre-action systems face issues with trapped water accumulating above the clapper body, which can increase pressure and prevent the clapper valve from opening during activation, leading to system failure, and existing solutions do not effectively detect and address this issue.
Innovation Solution
A water column supervisory switch with a probe arrangement that detects the presence of water at a predetermined level using an electrical signal and activates an alarm when the water reaches this level, ensuring timely intervention and preventing system failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water column supervisory switch with probe arrangement is installed to detect trapped water, then system reliability is improved, but device complexity increases
Solution Approach 1:
The probe arrangement is positioned at a predetermined level above the clapper body to detect trapped water before it accumulates to dangerous levels. This preliminary detection allows the system to alert operators proactively, preventing the condition where trapped water prevents clapper valve opening, thus improving reliability without requiring complex real-time monitoring systems.
Solution Approach 2:
The patent replaces complex mechanical water level detection mechanisms with an electrical probe arrangement. The probe detects the presence of conductive water through electrical conductivity, substituting what would traditionally require complex mechanical float systems or pressure sensors, thereby improving reliability while minimizing the increase in device complexity.
2Reliability
If the probe arrangement is positioned at a predetermined level to detect trapped water early, then system functionality is maintained, but manufacturing precision requirements increase
Solution Approach 1:
The probe arrangement serves as an intermediary element between the water column and the detection system. By positioning the probe at a predetermined level that is easily manufacturable (not requiring extreme precision), it mediates between the physical water accumulation and the electrical detection mechanism, allowing for standard manufacturing tolerances while maintaining system functionality.
Solution Approach 2:
The probe arrangement creates an electrical copy or representation of the water presence condition. Rather than requiring precise mechanical measurement of water level, the probe creates an electrical signal that replicates the water presence state, allowing detection at predetermined levels that are easier to manufacture with standard tolerances.
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 solution effectively detects and alerts against trapped water, preventing increased pressure and ensuring the clapper valve can open during system activation, thereby maintaining system functionality and preventing failures.
Implementation Method 1
introducing an electrical signal into the valve casing such that the electrical signal is present within the conductive medium inside the valve casing at the predetermined level, the electrical signal being transmitted through the conductive medium inside the valve casing according to a valve of electrical conductivity of the conductive medium
Data Source
AI summary
A water column supervisory switch having a probe arrangement and probe circuitry for detecting the presence of a conductive medium that has reached a predetermined level above a clapper valve inside a dry pipe valve for a sprinkler system is disclosed. The probe arrangement comprises a housing and a probe operatively associated with probe circuitry that provides a means for activating an alarm when the conductive medium reaches the predetermined level in order for maintenance personnel to drain the water from the dry pipe valve.