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A method and system for improving the efficiency of pipe network leakage control

A technology for controlling efficiency and leakage, applied in pipeline systems, general water supply conservation, gas/liquid distribution and storage, etc., can solve problems such as lack of scientific basis, unsatisfactory leakage control effect, and low efficiency of water supply network leakage control

Active Publication Date: 2019-04-23
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high pressure does not mean high leakage, so sometimes there are situations where pressure control is not effective in controlling leakage
The shortcomings of the above two aspects lead to the lack of scientific basis for the selection of leakage control strategies in the leakage control work, which makes the efficiency of water supply network leakage control low

Method used

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  • A method and system for improving the efficiency of pipe network leakage control
  • A method and system for improving the efficiency of pipe network leakage control
  • A method and system for improving the efficiency of pipe network leakage control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] Step 1: Select 20 independent metering areas in a pipe network, and count the total length L of cast iron pipes in each independent metering area a , total length of non-cast iron pipe L b , the number of users N;

[0116] Step 2: Monitor the flow and pressure of each independent metering area in real time for 7 consecutive days. The monitoring time interval is once every 15 minutes, and extract the daily minimum nighttime flow MNF and the corresponding pressure P when the minimum nighttime flow occurs;

[0117] Step 3: Calculate the average of the above 7-day MNF and P respectively, and denote it as MNF ave , P ave ;

[0118] Step 4: Established MNF with multiple linear regression method ave with L a , L b , N, P ave relationship, as follows: MNF ave =(0.02L a +0.00134L b +0.0336N)·P ave (1)

[0119] In the formula, MNF ave The unit is L / s; L a , L b The unit of N is km; the unit of N is thousand households; P ave The unit is m.

[0120] Step 5: Select a...

Embodiment 2

[0122] Analyze an independent metering area and count the total length L of cast iron pipes a = 9.3 km, L b =0.4km, N=7.36 thousand households, P ave =28.8m, put the above variables into the formula (1), get MN Fave,sim1 ==12.5L / s. While the actual MNF detected 1 =17.3L / s, it can be seen that MNF 1 >MNF ave,sim1 , indicating that the current leakage situation in the independent measurement area is higher than it should be, and leakage detection should be carried out.

Embodiment 3

[0124] Analyze an independent metering area and count the total length L of cast iron pipes a = 3.7km, L b = 0km, N = 2.33 thousand households, P ave =35.7m, put the above variables into formula (1), and get MNF ave,sim1 =5.44L / s. While the actual MNF detected 1 =9L / s, it can be seen that MNF 1 >MNF ave,sim1 , indicating that the current leakage situation in the independent measurement area is higher than it should be, and leakage detection should be carried out. In addition, the current pipe network pressure P ave (35.7m) higher than the local pressure standard value P 2 (28m), the P 2 Substitute into P in formula (1) ave , get MNF ave,sim2 =4.26L / s, with the above MNF ave,sim1 =5.44L / s, the leakage can be further reduced by 1.18L / s, and 37,000 cubic meters of water can be saved throughout the year. Assuming that the unit water supply cost is 3 yuan / cubic meter, the benefits obtained by the pressure control of the independent metering area It is 3.7*3=111,000 yuan...

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Abstract

The invention discloses a method and system for improving the pipe-network leakage control efficiency. A pipe-network leakage control effect evaluation model is established by obtaining basic attributes M of all independent metering areas and minimum night flow (MNF) and corresponding pressure values P when the MNF occurs; the independent metering area is evaluated by obtaining a basic attribute M1 of any one independent metering area, the minimum-night-flow average value MNF1 and a corresponding pressure average value P1 when the MNF occurs in cooperation with the pipe-network leakage control effect evaluation model, corresponding pipe-network leakage control measures are determined, the problem that in leakage control work, selection of the leakage control strategies is free of a scientific basis is solved, and it is avoided that as the control measures are blindly adopted, the water-supply-pipe-network leakage control efficiency is reduced. In this way, the method and system are adopted, and the water-supply-pipe-network leakage control efficiency can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of water supply pipe network leakage, in particular to a method and system for improving the efficiency of pipe network leakage control. Background technique [0002] The leakage of water supply pipe network wastes a lot of water resources, which is a serious industry problem. In order to realize the efficient use of water resources, it is necessary to reduce the leakage of pipe network. In leakage control, appropriate control means must be selected to improve the economic effectiveness of leakage control. At present, the two main conventional means to reduce the leakage of the pipe network are: leak detection and repair and pressure regulation. Leak detection and repair is to find the leaking points in the pipe network and repair them. Pressure regulation is to reduce the water pressure in the pipe network by installing a pressure reducing device, so that the leakage speed of the water leakage point will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D5/02
CPCY02A20/15
Inventor 徐强强志民马金锋
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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