Leakage loss detection method combining leakage loss recording instrument with district metering areas (DMA)

Abstract

The invention belongs to the field of leakage loss detection of a pipe network, and particularly relates to a leakage loss detection method combining district metering areas (DMAs) with a leakage loss recording instrument for an urban water supply pipe network. A water supply pipe network is partitioned into a plurality of DMAs, and the inlet of each DMA is provided with a flow meter for continuously monitoring the minimum night flow of the DMAs. When flow data indicates possible leakage loss of a DMA, the leakage loss recording instrument is used for monitoring as well as checking leakage loss and positioning a leakage loss point according to a signal. By the leakage loss detection method, the advantages of DMA partitioned monitoring and leakage loss recording instrument monitoring are brought into full play, leakage loss can be found in time and a leakage loss point is positioned quickly. By the method, the problems of high data acquisition workload, slow response and the like caused by independent use of the leakage loss recording instrument are solved, and the defects of difficulty in the check of leakage loss and the positioning of the leakage loss point caused by independent use of DMA partitioned monitoring are overcome. Leakage loss monitoring efficiency can be improved greatly and the operating management level of the pipe network is increased. The method is suitable for monitoring leakage loss in the urban water supply pipe network, and can be used for monitoring leakage loss of pipelines such as a reclaimed water pipe network, a thermal pipeline, an oil gas pipeline and the like.

Description

technical field [0001] The invention relates to a pipeline leakage detection method. In the method, an independent metering area (DMA) is used in conjunction with a leakage recorder, and is particularly suitable for leakage detection of urban water supply pipe networks. Background technique [0002] The water supply network is one of the infrastructures of the city and the "lifeline of the city". Its safe and stable operation is closely related to the production and life of the city. However, my country's urban water supply network leakage problem is quite serious. According to relevant statistics, in more than 600 cities across the country, the total length of urban water supply pipelines (above DN75mm) has reached more than 140,000 kilometers, the total annual water supply has reached more than 33 billion tons, and the average leakage rate of the pipeline network is 15.6%. A total of 4.5 billion tons. Assuming that the average cost of urban water supply is 1.10 yuan / ton,...

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