Backwater Valve Partial Blockage Detection
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Solution Overview
Problem
Existing backwater valve systems do not effectively detect partial blockages in sewer lines before a backup occurs, leading to potential flooding and damage, as they primarily respond after a backup has started rather than anticipating and preventing it.
Innovation Solution
Incorporating a sensor system within the backwater valve that detects fluid undulations of predetermined magnitude and frequency, triggering an alarm when a predetermined number of undulations occur within a set time period, indicating a potential partial blockage and allowing for preventive measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a backwater valve is installed to prevent sewer backups, then protection against flooding is improved, but the ability to detect partial blockages before complete backup occurs deteriorates
Solution Approach 1:
The sensor system detects fluid undulations that occur during partial blockages before they progress to complete sewer backups. This preliminary detection allows corrective action to be taken in advance, preventing the harmful event rather than just responding after it occurs.
Solution Approach 2:
The backwater valve system incorporates sensors that continuously monitor fluid movement and provide feedback about the system's state. When undulations indicating partial blockage are detected, the system can alert operators to take corrective action, creating a closed-loop monitoring and response system.
2Measurement precision
If sensors are added to detect fluid undulations, then detection capability is improved, but device complexity increases
Solution Approach 1:
The sensor system leverages the natural fluid undulations that occur during partial blockages as the detection mechanism. The system uses the problem's own physical manifestations (fluid movement patterns) as the sensing signal, eliminating the need for complex external detection apparatus and keeping the system relatively simple while maintaining effective monitoring 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
The sensor system enables early detection of impending sewer backups by monitoring fluid movements within the backwater valve, allowing for timely corrective actions to prevent complete obstruction and subsequent flooding.
Implementation Method 1
The gate is buoyant in water, whereby backflow through the outlet into the interior volume of the main body pivots the gate toward the raised position
Data Source
AI summary
The present disclosure describes systems and apparatus for detecting an impending sewer backup by detecting fluid undulations of predetermined magnitude inside a main body of a backwater valve. When at least a predetermined number of fluid undulations of predetermined magnitude are detected within a predetermined time period, an alarm can be triggered. Such undulations can be detected by monitoring a buoyant gate in a normally-open backwater valve to detecting instances of movement of the gate from a lowered position in which fluid flow from an inlet through the backwater valve is unobstructed by the gate toward but stopping short of a raised position in which the gate closes the inlet to obstruct fluid flow through the valve. For example, a sensor can be carried on the gate to detect movement of the gate. Alternatively, fluid levels inside the main body can be monitored directly.