Device and method for multi-point micro-leakage detection in pipeline water delivery system

Abstract

The invention discloses a pipeline water conveying system multi-point tiny leakage detection device and method. The method comprises the steps that transient drive signal generation equipment and a single-point pressure sensing unit are arranged at the tail end of a pipeline of a detected pipe net system to monitor tiny leakage points between the pipeline upstream position and the motivation position; the transient drive signal generation equipment is started, short-time drive signals are generated, and the single-point pressure sensing unit synchronously collects transient pressure signals; the transient pressure signals are analyzed, and the time and the reduced amplitude corresponding to pressure sudden change points of the first-phase pressure wave of the signals are analyzed; and the number of leakage points is identified according to the number of the pressure sudden change points of the first-phase pressure wave; and the position and leakage parameter of each leakage point are calculated according to the time and the reduced amplitude corresponding to each pressure sudden change point. The fact that the attenuation and distortion rule of the first pressure wave of transient water attack is different from that of single-hole leakage is utilized, multi-point and tiny leakage identification is conducted, simpleness and effectiveness are achieved, understanding is easy, the collected data volume is small, and reliability is high.

Description

technical field

[0001] The invention relates to a leakage detection technology of a pipeline network system, in particular to a multi-point micro-leakage detection device and method for a pipeline water delivery system. Background technique

[0002] Pipeline leakage is a ubiquitous phenomenon in the process of pipeline transportation of liquids, causing a lot of resource loss, energy waste and environmental pollution. Pipeline leakage detection mainly studies the theory and method of leakage early warning, monitoring and rapid and accurate positioning in pipeline water transmission projects, water transmission and distribution pipeline networks, and urban drainage pipeline networks, as well as related technologies for controlling and reducing pipeline leakage losses or poor production and sales. The management and maintenance, efficient and stable operation of drainage pipelines provide theoretical basis and technical reference. It is a hot demand in the current constructio...

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