Hinged Sewerage Drop Bowl Sealing for Splash and Gas Containment

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Solution Overview

Problem

Existing internal drop systems in wastewater lift station wells and sewerage catch basins suffer from sewage splashing, which causes corrosion and releases hazardous hydrogen sulfide gas, posing risks to maintenance workers.

Innovation Solution

A clamshell-like apparatus with a hinged lid and seals is used to redirect sewage flow, creating a fluid-tight seal that contains splashes and gases, preventing corrosion and reducing hazardous gas exposure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If an uncovered or open drop bowl is used to channel sewage, then the structure is simple and easy to manufacture, but sewage splashes out causing corrosion and releasing hazardous gases

Engineering Contradiction:

Improvesimplicity of drop bowl structureVSAvoidsewage splashing and gas release

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The patent applies a lid that covers the drop bowl opening, creating a containment structure that prevents sewage splashing and gas release while maintaining the simplicity of the underlying drop bowl design. The lid acts as a protective shell that seals the harmful factors inside the drop bowl.

Inventive Principle:

Principle #30Flexible shells and thin films

2Object-affected harmful factors

If a covered drop bowl is used to contain sewage, then splashing and gas release are prevented, but the device complexity increases

Engineering Contradiction:

Improvecontainment of sewage splashes and gasesVSAvoidcomplexity of drop bowl structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent divides the containment structure into separate functional components: the drop bowl for channeling sewage and the lid for containment. This segmentation allows each component to be optimized independently - the drop bowl maintains its simple channeling function while the lid provides the necessary containment without complicating the overall structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The lid serves multiple functions simultaneously: it prevents sewage splashing, contains hazardous gases, and can be designed with hinges for easy opening/closing. This multi-functionality achieves comprehensive containment without proportionally increasing device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Object-affected harmful factors

If the lid is fixed closed to contain gases, then hazardous gas release is prevented, but access for maintenance becomes difficult

Engineering Contradiction:

Improveprevention of H2S gas releaseVSAvoidaccessibility for maintenance

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The patent employs a hinged lid that can dynamically transition between closed and open states. The hinge mechanism allows the lid to remain closed during normal operation to contain hazardous gases, while enabling easy opening for maintenance access and closing afterward, thus resolving the contradiction between gas containment and maintenance accessibility.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12559930B2Sewerage basin internal drop apparatus and method

Publication Date: 2026.02.24 PHENIS ANDREW RYAN DEAN

AI summary

An apparatus includes a sewerage drop bowl and a lid hingedly coupled to the drop bowl. The drop bowl and the lid are configured to be cooperable to house a first portion of a sewerage pipe, are configured to be cooperable to receive a sewage flow from the sewerage pipe in a first direction, and are configured to be cooperable to redirect the sewage flow to a second direction.