Rainwater Storage Pipe Layout for Sludge-Controlled Underground Tanks

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Solution Overview

Problem

Conventional water storage tanks face challenges in efficiently storing large amounts of rainwater due to sludge accumulation and limited inflow capacity, leading to inefficient storage and maintenance issues.

Innovation Solution

A rainwater storage device comprising multiple water storage pipes with ground-level inflow ports and inclined connecting pipes that direct sludge to a single pipe, combined with a construction method using a low overhead clearance excavator for installation in narrow spaces.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If rainwater is guided into a specific steel pipe and stored in other steel pipes in sequence, then the water storage tank can store rainwater, but the sludge accumulates in the entire water storage tank and the storage capacity is limited

Engineering Contradiction:
Improverainwater storage capacityVSAvoidsludge accumulation
Core Design Contradiction:
Quantity of substanceVSObject-generated harmful factors

Solution Approach 1:

The water storage system is divided into multiple independent water storage pipes arranged in rows and columns, each with its own inflow port. This segmentation allows rainwater to be distributed to multiple pipes simultaneously rather than sequentially, increasing storage capacity while the inclined connecting pipes ensure sludge is directed to a specific collection point rather than accumulating throughout the entire system.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

An inclined lower connecting pipe serves as an intermediary element that collects sludge from multiple water storage pipes and directs it to a specific water storage pipe where it can be concentrated and managed. This intermediary structure prevents sludge from distributing throughout the entire water storage system, solving the sludge accumulation problem while maintaining high storage capacity.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Area of stationary object

If multiple water storage pipes are connected horizontally to increase storage area, then more rainwater can be stored, but sludge accumulates in adjacent pipes

Engineering Contradiction:
Improvewater storage areaVSAvoidsludge accumulation
Core Design Contradiction:
Area of stationary objectVSObject-generated harmful factors

Solution Approach 1:

The lower connecting pipes are designed with a specific inclination toward one water storage pipe, creating a localized quality difference in the connecting pipe system. This inclination ensures that sludge naturally flows to a specific location rather than distributing evenly throughout all connected pipes, allowing the system to expand its storage area while preventing sludge accumulation in adjacent pipes.

Inventive Principle:
Principle #3Local quality

3Ease of manufacture

If a conventional excavator is used to install water storage pipes, then the pipes can be buried, but the excavator cannot access narrow excavation sites with height limited workspace

Engineering Contradiction:
Improveinstallation capabilityVSAvoidaccess to narrow spaces
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent specifies using a low overhead clearance excavator instead of a conventional excavator. This specialized excavator is designed with reduced overhead clearance to match the constrained workspace conditions in narrow excavation sites, enabling installation of water storage pipes in locations where conventional equipment cannot access, thus improving both ease of manufacture and adaptability to different site conditions.

Inventive Principle:
Principle #26Copying

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 allows for rapid storage of large volumes of rainwater while preventing sludge accumulation, reducing maintenance needs, and enabling efficient construction in confined areas like building basements.

Implementation Method 1

a lower connecting pipe that connects bottom part regions of the plurality of water storage pipes... the lower connecting pipe is arranged in an inclined state toward one water storage pipe out of the plurality of water storage pipes... the rainwater-derived sludge that has flown into the multiple water storage pipes accumulates in the one water storage pipe through the lower connecting pipe

Methodology Applied
Scientific EffectGravity: Gravitation

Data Source

PatentUS12600571B2Rainwater storage device and construction method thereof
Publication Date: 2026.04.14 YAMAMOTO FOUND WORKS
  • US12600571B2 patent drawing
  • US12600571B2 patent drawing
  • US12600571B2 patent drawing

AI summary

A rainwater storage device includes a plurality of water storage pipes buried in a ground, the water storage pipes each having a rainwater inflow port on a surface of a ground; and a lower connecting pipe that connects bottom part regions of the plurality of water storage pipes. The plurality of water storage pipes is arranged in a plurality of rows and columns, extending in a longitudinal direction and a lateral direction, respectively, and the lower connecting pipe is arranged in an inclined state toward one water storage pipe out of the plurality of water storage pipes.