Intelligent identification method for leakage position of water pressure test of long-distance water supply pipeline

Abstract

The invention discloses a long-distance water supply pipeline hydrostatic test leakage position intelligent identification method in the technical field of pipeline hydrostatic test leakage, and the method comprises the steps: building a conceptual model, taking a hydraulic basic principle as a basis, building the conceptual model: the water seepage amount is only related to the equivalent pipe diameter of a leakage point, and is not related to the position of the leakage point; the water seepage amount is equal to the sum of water injection amounts; the long-end on-way head loss is large, and the outflow is small; the short-end on-way head loss is small, and the outflow is large; the two-end on-way head loss is determined by the leakage point position; compared with a common pipeline leakage point detection method, detection of a ground penetrating radar and an acoustic instrument needs high equipment deployment cost, an Internet of Things sensor needs additional conditions such as electric power and communication, and a waveform-based detection method depends on negative pressure waves generated instantly by a leakage point and needs support of related equipment; according to the method, only a conventionally designed pressure gauge is utilized, monitoring equipment does not need to be independently installed, manpower and material resource expenses are greatly saved, and engineering cost is saved according to the energy conservation principle.

Description

technical field [0001] The invention relates to the technical field of pipeline hydraulic test leakage, in particular to an intelligent identification method for the leakage position of long-distance water supply pipeline hydraulic test. Background technique [0002] According to the "Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering (GB50268-2008)" and "Technical Specifications for Prestressed Steel Tube Concrete Pipelines (SL702-2015)", the water supply pipeline must undergo a hydrostatic test, and it can be connected to the grid after passing the hydrostatic test. run. Generally, in actual projects, the length of the hydraulic test pipeline is several meters to tens of meters, or even hundreds of meters. For example, the total length of the pipeline in the second phase of the Libyan Great Artificial River Project is 1731km. The project divides the entire water pipeline into four independent sections. Conduct hydrostatic test; the whol...

AI Technical Summary

Problems solved by technology

In the long-distance pipeline hydrostatic test, leak point identification is extremely critical. Commonly used pipeline leak point identification technologies include ground-penetrating radar, acoustic detection equipment, and wireless sensor Internet of Things detection. These methods have high cost, need to be buried, and take a long time. For problems involving large manpower, material and financial resources, how to analyze and identify the location of leaks based on the basic principles of hydraulics and according to the changes in the readings of the pressure gauges installed in the pipeline design during the hydraulic test can greatly improve work efficiency and save engineering costs

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