Float-Switch Sewer Backup Shutoff for Multistory Flood Prevention

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Solution Overview

Problem

Multistory buildings often experience severe flooding in lower units due to blockages in shared sewer lines, leading to costly repairs and contamination issues.

Innovation Solution

A flood prevention system that includes float switches parallel to the waste line, which activate power gate valves to shut off the water supply when a blockage is detected, preventing further flooding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If float switches and power gate valves are installed to automatically shut off water supply when blockage is detected, then flooding prevention capability is improved, but device complexity increases

Engineering Contradiction:
Improveflooding prevention capabilityVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The float switches are installed in advance within the sewer line to detect blockages before flooding occurs. The system is pre-configured with power gate valves positioned to automatically shut off water supply when blockage is detected, preventing flooding before it happens rather than responding after damage occurs.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The float switch acts as an intermediary sensor that detects water level changes caused by blockages and triggers the power gate valve to shut off water supply. This intermediary mechanism bridges the detection of blockage conditions and the automated response to prevent flooding.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If automatic shut-off system is implemented to prevent flooding, then water damage reduction is improved, but initial installation cost increases

Engineering Contradiction:
Improvewater damage preventionVSAvoidinstallation cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The system is designed to automatically detect blockages and shut off water supply without requiring manual intervention. The float switches and power gate valves work autonomously to prevent flooding and water damage, eliminating the need for costly manual monitoring and rapid response services.

Inventive Principle:
Principle #25Self-service

3Measurement precision

If multiple sensors and valves are installed in sewer lines, then detection accuracy is improved, but maintenance difficulty increases

Engineering Contradiction:
Improveblockage detection accuracyVSAvoidmaintenance difficulty
Core Design Contradiction:
Measurement precisionVSEase of repair

Solution Approach 1:

The sewer line is divided into segments with float switches installed at strategic locations to detect blockages. Each float switch monitors a specific section, allowing localized detection and response. This segmentation enables targeted maintenance rather than requiring inspection of entire sewer lines.

Inventive Principle:
Principle #1Segmentation

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 effectively prevents sewer line backups and flooding by automatically shutting off the water supply, reducing damage and maintenance costs while ensuring safety from contamination.

Implementation Method 1

float switches that run parallel to the waste line and may be activated when the water backs up

Methodology Applied
Scientific EffectBuoyancy: Archimedes' Principle (Buoyancy)

Implementation Method 2

The floating switch sensor may be installed within the sewer line and be connected to a solenoid valve

Methodology Applied
Scientific EffectElectromagnetic force: Electromagnet

Data Source

PatentUS20250188729A1Flood prevention system
Publication Date: 2025.06.12 GREGGE FORREST LEE
  • US20250188729A1 patent drawing
  • US20250188729A1 patent drawing
  • US20250188729A1 patent drawing

AI summary

Provided herein are embodiments of a flood prevention system. The flood prevention system may include a water line, a sewer line, and at least one floating switch sensor. The water line and sewer line may be connected to a plumbing fixture. The floating switch sensor may be installed within the sewer line and be connected to a solenoid valve.