CN108428043A - A kind of pipeline burst rank division method based on water quality safety risk - Google Patents
A kind of pipeline burst rank division method based on water quality safety risk Download PDFInfo
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- CN108428043A CN108428043A CN201810092568.9A CN201810092568A CN108428043A CN 108428043 A CN108428043 A CN 108428043A CN 201810092568 A CN201810092568 A CN 201810092568A CN 108428043 A CN108428043 A CN 108428043A
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- pipeline
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0635—Risk analysis of enterprise or organisation activities
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/10—Services
- G06Q50/26—Government or public services
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/152—Water filtration
Abstract
The present invention provides a kind of pipeline burst rank division method based on water quality safety risk, including：Applying pressure driving model simulates pipe burst operating mode；Choose index of the duct length for flowing to and changing as ductwork water quality security risk；Divide pipeline risk class.The present invention improves the management, repair and booster prevention and control efficiency of water supply network, and then mitigates potential water quality impact caused by booster.
Description
Technical field
The present invention relates to municipal works and public supply mains field.
Background technology
City supply water pipeline causes heavy economic losses and society since aging and operational management are not good at being easy to happen booster
It influences.According to statistics, it is more than 100 that pipe explosion accident, which occurs, for Guangzhou in 2016, and direct economic loss is up to more than one hundred million members.Water supply network
Booster event not only results in the significant wastage of water resource, and road surface can also be caused to cave in and the potential threats such as drinking water secondary pollution
The influence of resident living and municipal public safety.
Problem is influenced for water supply network booster, vast researcher has been carried out a large amount of work, can be divided mainly into
Two classes.One kind is the research that booster influences hydraulic pipeline, for example, influence research of the booster for ductwork pressure, booster situation
Correlativity research between lower pipe network node flow and pressure and the quick Position Research of booster.Another kind of is booster to week
The influence of surrounding environment is studied, if booster is to the pipeclay interaction mechanism of Soil Surrounding washed away in the case of erosion research, booster
Security of system research in the case of research and booster.
In fact, booster is other than making a significant impact surrounding enviroment and hydraulic pipeline, to ductwork water quality safety there is also
Great influence.In booster event in recent years, often reports quality problem (such as yellow water) caused by booster, seriously threaten water supply water
Matter safety.When booster occurs, since the generation of hydraulic pipeline condition drastically changes, the flow velocity of many pipelines significantly improves, and has one
A little pipelines even occur flow direction and change, and lead to tube wall biofilm detachment, cause water quality safety hidden danger.However, current water supply line
Still lack the analysis influenced for water quality safety in booster research, from this demand, the present invention proposes a kind of based on water quality
The pipeline burst rank division method of security risk, to quantify influence rank of the different pipeline bursts to water quality safety, Jin Erwei
Management, repair and the booster prevention and control of water supply network provide important policy guidance.
Invention content
The technical problems to be solved by the invention：A kind of pipeline burst grade classification side based on water quality safety risk is provided
Method to improve the management, repair and booster prevention and control efficiency of water supply network, and then mitigates potential water quality impact caused by booster.
The overall core technology scheme of this method is as follows：
(1) applying pressure driving model simulates pipe burst operating mode.Specific method is：Pipeline j is broken as two pipelines
j1And j2, and the initial value of the two basic water requirements of node increased newly after pipeline is disconnected is set as a sufficiently large value ε (such as ε
=10,000L/s) to start the simulation of pressure-driven model, pass through iterative calculation, the reality of calculated two nodes of model
The actual flow that the sum of water requirement flows out when being pipeline j boosters.
(2) after booster, the hydraulics of pipe network change, and section of tubing flow direction can be caused to change, in turn resulted in
Quality problems such as " yellow waters " easily occur for tube wall biofilm detachment.Therefore, the present invention chooses the duct length that flow direction changes and makees
For the index of ductwork water quality security risk.
First, it need to identify and the pipeline that flow direction changes occurs, specific formula for calculation is as follows：
Ω in formulaj(t) it is pipeline j=1 ..., N (N is water supply network pipeline sum) causes k when booster occurs for t moment
The set that flow direction changes occurs for pipeline；WithFor pipeline k respectively before and after booster occurs for pipeline j
Flow vector；Sgn () is defined as the symbol of return flow vector, if flow value is just, sgn ()=1, otherwise, sgn ()
=-1.
Then, the pipeline overall length that flow direction changes is calculated, specific formula for calculation is as follows：
L in formulaj(t) it is that pipeline j causes the total length for flowing to the pipeline changed in t moment booster；lkFor the length of pipeline k
Degree.Lj(t) pipeline j fractures influence degree caused by potential water quality safety is indicated, value is bigger, and the water quality grade that represents is higher,
Vice versa.
(3) pipeline risk class is divided.By N number of Lj(t) value carries out ascending order arrangement, and the pipeline of sequence more rearward means it
It can cause more pipelines that flow direction occurs when booster to change, in turn result in higher water quality safety risk.
The critical issue of research is influenced to solve booster in background technology, is pacified based on water quality present invention firstly provides a kind of
The pipeline burst rank division method of full blast danger, this method are according to flowing to the pipeline total length of change caused by booster to pipeline
It is ranked up, rank is divided, the degree of risk of potential quality problem may occur after each pipeline burst of determination.
The present invention has following major advantage compared with existing booster influences research：Existing booster influences most of research
The interaction and booster for considering booster and external environment consider the hydraulic factors of pipe network itself, and the pipe network caused by booster
Potential water quality security research is very few.Pipeline risk class division methods proposed by the invention are based on booster to pipe network
The quantization and identification of water quality safety risk, division result can be ductwork water quality daily maintenance and management, and booster is repaired and resource
Optimized Operation provides theoretical direction.The present invention has originality, is had to an important supplement of current booster research field
Important scientific meaning and application value.
Description of the drawings
Fig. 1 is the general flow chart of the pipeline burst rank division method the present invention is based on water quality safety risk.
Fig. 2 is pipeline (red) distribution map (water consumption highest of generation flow direction change after certain DN600 pipelines (blue) booster
When).
Fig. 3 is the distribution map of certain pipe network pipeline grade classification (when water consumption highest).
Specific implementation mode
Referring to Fig. 1, specific implementation step of the invention is as follows：
(1) Water Distribution Hydraulic Simulation is established：Each component part opens up in the main expression system of water supply network model
Relationship and hydraulic characteristic(s) are flutterred, by pipe network simplification and two dvielement of pipeline section and node is abstracted as, and assign engineering attribute, to use water
Calculating is expressed and analyzed to mechanics, graph theory and mathematical analysis theory etc..
(2) pressure-driven calculation formula is chosen：Part of nodes free head can be caused insufficient when pipe burst, section at this time
Point flow and pressure correlation.Therefore, traditional water requirement driving model does not use, and need to choose pressure-driven formula and be counted
It calculates.That the present invention chooses is Q=CHγ(Q is leakage flow；C is leakage factor, and determination is calculated automatically by model；H is node pressure
Power；γ is pressure index, is taken 0.5).
(3) the flow vector of all pipelines under nominal situation is calculated
(4) by pressure-driven model creation pipeline j=1,2 ..., the booster operating mode of N (N is pipeline sum).
(5) the flow vector of all pipelines under step (4) booster operating mode is calculated
(6) it determines and the pipeline that flow direction changes occurs：According to formula (1), the pipe that change is flowed to caused by booster is calculated
Road set, Ωj(t)。
(7) overall length of impacted pipeline is calculated：According to formula (2), set of computations Ωj(t) the pipeline total length in, Lj
(t), the bigger risk for representing generation water quality event (such as " yellow water ") of value is higher.
(8) j=j+1 is returned to (4), until j=N.
(9) pipeline risk class is divided：By N number of Lj(t) value carries out ascending order arrangement, and the pipeline of sequence more rearward means quick-fried
Cause the coverage of potential water quality safety event bigger when pipe.
Apply the method for the invention to certain public supply mains (as shown in Figure 1).The water supply pipe net system includes water source 1
It is a, node 3439, pipeline section 3512.Operating mode under the conditions of when selection pipe network water consumption highest, to capture the maximization of booster
Influence degree.After Fig. 1 gives pipeline (blue pipeline) booster of certain root DN600, pipeline (the red pipe to change is flowed to
Road) distribution schematic diagram.As shown, can not necessarily cause surrounding conduit that reverse flow occurs after booster occurs, potential range is quick-fried
The more remote pipeline of pipeline can also occur flow direction and change, and then may cause water pollution event.Fig. 2 gives based on flow direction
The booster grade classification schematic diagram of change, for the ease of displaying, which falls into 5 types in total, is influenced from R1 to R5
Range is higher and higher.As shown, R5 (red) pipeline risk class highest, it is meant that after booster occurs, cause potential water
Geological Problems influence is more serious, needs to add to safeguard in daily management and inspection is investigated, to reduce the risk of its booster.
Claims (1)
1. a kind of pipeline burst rank division method based on water quality safety risk, the method comprising the steps of：
(1) applying pressure driving model simulates pipe burst operating mode；Specific method is：Pipeline j is broken as two pipeline j1With
j2, and the initial value of the two basic water requirements of node increased newly after pipeline is disconnected is set as a sufficiently large value ε to start
The simulation of pressure-driven model, by iterative calculation, the sum of practical water requirement of calculated two nodes of model is pipeline j
The actual flow flowed out when booster；
(2) index of the duct length for flowing to and changing as ductwork water quality security risk is chosen；
(2.1) according to formula (1), calculate and identify the pipeline that flow direction change occurs,
In formula, Ωj(t) it is pipeline j=1 ..., N (N is water supply network pipeline sum) causes k pipelines when booster occurs for t moment
The set that flow direction changes occurs；WithFor flows of pipeline k before and after booster occurs for pipeline j respectively
Vector；Sgn () is defined as the symbol of return flow vector, if flow value is just, sgn ()=1, otherwise, sgn ()=-
1；
(2.2) the pipeline overall length that flow direction changes is calculated according to formula (2),
L in formulaj(t) it is that pipeline j causes the total length for flowing to the pipeline changed in t moment booster；lkFor the length of pipeline k；Lj
(t) pipeline j fractures influence degree caused by potential water quality safety is indicated, value is bigger, and the water quality grade that represents is higher, on the contrary
It is as the same；
(3) pipeline risk class is divided；By N number of Lj(t) value carries out ascending order arrangement, and the pipeline of sequence more rearward means its booster
When can cause more pipelines that flow direction occurs to change, in turn result in higher water quality safety risk.
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| CN201810092568.9A CN108428043A (en) | 2018-01-30 | 2018-01-30 | A kind of pipeline burst rank division method based on water quality safety risk |
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|---|---|---|---|
| CN201810092568.9A CN108428043A (en) | 2018-01-30 | 2018-01-30 | A kind of pipeline burst rank division method based on water quality safety risk |
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| CN108428043A true CN108428043A (en) | 2018-08-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109886506A (en) * | 2019-03-14 | 2019-06-14 | 重庆大学 | A kind of water supply network booster risk analysis method |
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| CN106202765A (en) * | 2016-07-15 | 2016-12-07 | 杭州电子科技大学 | A kind of public supply mains DMA Real-time modeling set method |
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2018
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| KR20030052198A (en) * | 2001-12-20 | 2003-06-26 | 주식회사 포스코 | An apparatus for controlling the level of decanter |
| CN106202765A (en) * | 2016-07-15 | 2016-12-07 | 杭州电子科技大学 | A kind of public supply mains DMA Real-time modeling set method |
| CN107633340A (en) * | 2017-07-21 | 2018-01-26 | 浙江大学 | A kind of water supply network circulation zone method for quickly identifying based on pressure monitoring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109886506A (en) * | 2019-03-14 | 2019-06-14 | 重庆大学 | A kind of water supply network booster risk analysis method |
| CN109886506B (en) * | 2019-03-14 | 2023-05-23 | 重庆大学 | Water supply network pipe explosion risk analysis method |
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Application publication date: 20180821 |