Drain backflow check method based on pipeline tree topology and water flow count

By using a drainage backflow inspection method based on pipeline tree topology and water flow counting, and by employing water flow counting simulation and adaptive excitation testing, efficient screening and accurate diagnosis of blockages in drainage pipe networks are achieved. This solves the problems of low detection efficiency and insufficient accuracy in existing technologies and improves the level of intelligent operation and maintenance of drainage pipe networks.

CN122065557BActive Publication Date: 2026-07-24CHONGQING INST OF SURVEYING & MAPPING SCI & TECH (CHONGQING MAP COMPILATION CENT) +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING INST OF SURVEYING & MAPPING SCI & TECH (CHONGQING MAP COMPILATION CENT)
Filing Date
2026-04-20
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing methods for detecting backflow and blockages in drainage suffer from non-standard selection of simulation nodes, lack of attribute classification for test nodes, rigid testing strategies, and low accuracy in blockage identification, resulting in low detection efficiency, high cost, and insufficient diagnostic accuracy.

Method used

The drainage backflow detection method based on pipeline tree topology and water flow counting constructs a pipeline tree topology structure, uses water flow counting to simulate and screen suspected blockages, and combines independent and shared leaf node attributes to adopt an adaptive excitation testing strategy to obtain hydraulic response data for determining the degree of blockage.

Benefits of technology

It enables efficient screening of suspected blockages, ensures accurate diagnosis of real blockages, dynamically balances testing efficiency and diagnostic accuracy, provides scientific basis for distinguishing blockage types and handling, and improves the intelligent level of drainage network operation and maintenance.

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Abstract

The present application relates to the technical field of urban drainage pipe network operation and maintenance detection, and particularly relates to a drainage backflow inspection method based on pipeline tree topology and water flow counting, comprising: obtaining a vector pipeline data set and constructing a pipeline tree topology; marking water flow direction according to elevation difference; determining root nodes and leaf nodes, then giving unit water flow for counting simulation and determining a plurality of suspected block points; generating a test leaf node set by backtracking upstream for each suspected block point to determine the independent or shared attributes of each leaf node; determining the incentive test content according to the number of suspected block points and node attributes: selecting shared nodes for initial testing, then using independent nodes for accurate testing on uncovered points, or directly using independent nodes for one-time testing on all suspected points; adjusting water flow and applying a preset waveform during incentive testing; finally, extracting hydraulic response data to determine the real physical block point and its blockage degree. The present application realizes closed-loop diagnosis of static simulation and dynamic testing, and significantly improves the detection efficiency and accuracy.
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