CN103590444A - Method for continuously monitoring leakage of large buried pressure water pipe and booster early warning system - Google Patents
Method for continuously monitoring leakage of large buried pressure water pipe and booster early warning system Download PDFInfo
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Abstract
The invention discloses a method for continuously monitoring the leakage of a large buried pressure water pipe. The method comprises the steps that (1), continuously-monitored signal collection equipment is arranged inside the large buried pressure water pipe, and signal measurement and analysis equipment is arranged outside the pipe; (2), basic signal data of vibration, strain, sound waves and pressure changes when the monitored pressure water pipe operates under the normal working condition are measured, the leakage process of the monitored pressure water pipe is simulated, and characteristic signal data of vibration, strain, squeal and water pressure changes in the leakage process are measured; (3), the monitored data are analyzed, a model for reflecting the working state of the monitored pipe is built, the degree of hazard level and an early warning threshold are determined, and an analysis judgment module and a dangerous case issuing module are developed; (4), the monitored pressure water pipe is monitored continuously, and when the hazard level reaches the early warning threshold, an early warning is given.
Description
Technical field
The present invention is applicable to the safety monitoring technology field of large-scale pressure water pipe, relate to Inter-Basin Water Transfer Project, Hydraulic and Hydro-Power Engineering and municipal engineering, also be applicable to the industries such as petrochemical industry and carry or store the safety monitoring of pressure pipeline or the pressure vessel of other liquid state or gaseous material, relate to particularly a kind of large-scale buried pressure water pipe seepage continuous monitoring method and explosion early warning system.
Background technology
For solving people's livelihood water conservancy, ensure that large-and-medium size cities supply water, large quantities of water diversion projects such as China has built and diverted Luanhe water to Tianjin, the east dark water supply ,Yin great Ru Qin, large-scalely also have the south water to north, draw Chinese Ji Weihe etc. across basin water diversion project what build and plan to build.Large-scale pressure water pipe is the important component part of water diversion project.
Built large-scale pressure water pipe pipe explosion accident happens occasionally both at home and abroad, these accidents are serious threat urban water supply safety not only, causes the waste of valuable water resource, brings huge economic loss, also can bring secondary disaster, the serious threat water-supply-pipe people's along the line life security.
The domestic and international booster for large-scale buried pressure water pipe all lacks effective early warning means at present.The built large-scale buried pressure water pipe of China mainly prevents the generation of pipe explosion accident by the method for the maintenance of regularly cutting off the water, because large-scale buried pressure water pipe is cut off the water the maintenance interval time long (maintenance in common a year once), turn(a)round, is short, by the method for the maintenance of cutting off the water, can not effectively stop booster occurs, although China is newly-built or buried the monitoring instruments such as leaking equipment underground in the buried pressure water pipe of the part of building part outside pipeline, but restricted by various applicable elements, not high to the validity of early warning booster, and monitoring instrument due to buried in underground, be difficult to safeguard and technology upgrading, therefore, need research and development badly a kind of effectively, be applicable to built or building seepage continuous monitoring method and the explosion early warning system of large-scale buried pressure water pipe, to ensure China's big and medium-sized cities water supply security, for Sustainable Socioeconomic Development escorts.
Although the booster reason of large-scale buried pressure water pipe is a lot, the booster that a class booster Shi You pipeline localized seepage most important and that be difficult to prevent causes.This class booster has an evolution, first be to cause pipeline localized seepage by a variety of causes, and then form jet under inner pipe water pressure, the current of high velocity jet wash away the sandy soil outside pipeline, for pipeline expands outwardly, provide space, when this space is enough large, pipeline is at the interior explosion formation booster of depressing.A large amount of observation and experiment demonstration, is being caused by seepage in the process of booster, the current of ejection can cause pipe vibration and utter long and high-pitched sounds at a high speed, and along with the development of the seepage order of severity causes that overpressure changes.The present invention is conceived to these attendant phenomenons just, by monitoring pipe vibration in large-scale pressure water pipe, utter long and high-pitched sounds, pressure changes and tube wall strain realizes the early warning to this class booster.Theory analysis and field trial all prove, the method principle is reliable, and precision is high, be not only applicable to newly-built pressure water pipe, also be adapted to built pressure water pipe, be convenient to the technology of needing badly of monitoring equipment maintenance and the pressure water pipe safe operation of technology upgrading ，Shi China.
Summary of the invention
For overcoming the defect of prior art, the technical problem to be solved in the present invention has been to provide a kind of large-scale buried pressure water pipe seepage continuous monitoring method, its by monitoring pipe vibration in large-scale pressure water pipe, utter long and high-pitched sounds, pressure changes and tube wall strain realizes the early warning to this class booster, precision is high, be not only applicable to newly-built pressure water pipe, also be adapted to built pressure water pipe, be convenient to monitoring equipment and safeguard and technology upgrading.
This large-scale buried pressure water pipe seepage continuous monitoring method, based on producing jet in pressure water pipe seepage process, there is pipe vibration, utter long and high-pitched sounds and overpressure variation phenomenon in described method; This continuous monitoring method, comprises the following steps:
(1) in large-scale pressure water pipe, arrange continuous monitoring signal collecting device, at pipeline, arrange signal measurement and analytical equipment outward;
(2) measure vibration, strain, sound wave and the pressure of monitored pressure water pipe when accidental conditions and change basis signal data; Simulate monitored pressure water pipe seepage process, measure the vibration, the strain that occur in seepage process, utter long and high-pitched sounds and variation in water pressure characteristic signal data;
(3) analyze monitored data, set up the model of the monitored pipeline work condition of reflection, determine extent of injury grade and threshold value of warning, judge module and dangerous situation release module are analyzed in exploitation;
(4) carry out the continuous monitoring of monitored pressure pipeline, while there are abnormal signal data, whether system automatic decision it caused by pipe leakage, judge whether these signals derive from same breakthrough and accurately locate breakthrough position, to deriving from the signal of same breakthrough, according to the extent of injury of vibration and the intensity of uttering long and high-pitched sounds, spectral characteristic and variation in water pressure data judgement seepage; When the extent of injury reaches threshold value of warning, issue alarm.
This method by monitoring pipe vibration in large-scale pressure water pipe, utter long and high-pitched sounds, pressure changes and tube wall strain realizes the early warning to this class booster, precision is high, be not only applicable to newly-built pressure water pipe, also be adapted to built pressure water pipe, be convenient to monitoring equipment and safeguard and technology upgrading.
The explosion early warning system that utilizes this large-scale buried pressure water pipe seepage continuous monitoring method is also provided, has comprised following composition:
(1) the continuous monitoring signal collecting device of arranging in large-scale pressure pipeline, comprises that distributed vibration and strain sensing optical fiber, underwater sound wave detector and cable, fiber grating hydraulic pressure takes into account transmission cable;
(2) signal measurement and the analytical equipment of outside large-scale pressure pipeline, arranging, comprise distributed optical fiber vibration and strain monitoring system, underwater sound wave detector acoustic vibration measurement mechanism, fiber grating water-pressure survey device;
(3) analyze judge module, dangerous situation release module;
(4) internet data transmission system.
The specific embodiment
This large-scale buried pressure water pipe seepage continuous monitoring method, based on producing jet in pressure water pipe seepage process, there is pipe vibration, utter long and high-pitched sounds and overpressure variation phenomenon in described method; This continuous monitoring method, comprises the following steps:
(1) in large-scale pressure water pipe, arrange continuous monitoring signal collecting device, at pipeline, arrange signal measurement and analytical equipment outward;
(2) measure vibration, strain, sound wave and the pressure of monitored pressure water pipe when accidental conditions and change basis signal data; Simulate monitored pressure water pipe seepage process, measure the vibration, the strain that occur in seepage process, utter long and high-pitched sounds and variation in water pressure characteristic signal data;
(3) analyze monitored data, set up the model of the monitored pipeline work condition of reflection, determine extent of injury grade and threshold value of warning, judge module and dangerous situation release module are analyzed in exploitation;
(4) carry out the continuous monitoring of monitored pressure pipeline, while there are abnormal signal data, whether system automatic decision it caused by pipe leakage, judge whether these signals derive from same breakthrough and accurately locate breakthrough position, to deriving from the signal of same breakthrough, according to the extent of injury of vibration and the intensity of uttering long and high-pitched sounds, spectral characteristic and variation in water pressure data judgement seepage; When the extent of injury reaches threshold value of warning, issue alarm.
This method by monitoring pipe vibration in large-scale pressure water pipe, utter long and high-pitched sounds, pressure changes and tube wall strain realizes the early warning to this class booster, precision is high, be not only applicable to newly-built pressure water pipe, also be adapted to built pressure water pipe, be convenient to monitoring equipment and safeguard and technology upgrading.
Preferably, in step (4) according to vibrating, utter long and high-pitched sounds, pressure change signal intensity is during along the position of the peaked location positioning leakage point of line distribution, adopts Spline Interpolation Method can improve leakage point position estimating precision.
Preferably, this system involving vibrations, strain, sound wave and pressure monitoring device, analysis judge module, dangerous situation release module and network data transmission system.Vibration, strain, sound wave and pressure monitoring device are by being arranged at the signal collecting device in pipeline and being arranged at the surveying record installation composition outside pipeline; Analyze judge module for judging whether the distinctive signal collecting is caused by pipe leakage, judge whether various distinctive signals derive from same breakthrough and accurately locate breakthrough position, and according to the extent of injury of vibration and the intensity of uttering long and high-pitched sounds, spectral characteristic and variation in water pressure data judgement seepage; Dangerous situation release module is measured and dangerous situation data in monitor terminal issue, when the extent of injury reaches threshold value of warning, sends sound and light alarm, and also by network, the mobile phone to related personnel gives the alarm.
The explosion early warning system that utilizes this large-scale buried pressure water pipe seepage continuous monitoring method is also provided, has comprised following composition:
(1) the continuous monitoring signal collecting device of arranging in large-scale pressure pipeline, comprises that distributed vibration and strain sensing optical fiber, underwater sound wave detector and cable, fiber grating hydraulic pressure takes into account transmission cable;
(2) signal measurement and the analytical equipment of outside large-scale pressure pipeline, arranging, comprise distributed optical fiber vibration and strain monitoring system, underwater sound wave detector acoustic vibration measurement mechanism, fiber grating water-pressure survey device;
(3) analyze judge module, dangerous situation release module;
(4) internet data transmission system.
Below embodiments of the invention are elaborated; the present embodiment be take technical solution of the present invention and is implemented as prerequisite; provided detailed embodiment and concrete operating process, but protection scope of the present invention is defined and is not limited to following embodiment by claims.
1. according to the large-scale buried pressure water pipe engineering properties of monitoring, carry out Monitoring Design.Pressure water pipe bore need meet the requirement of artificial installation monitoring optical fiber, cable and optical cable, is conventionally not less than 1.5m; According to length of pipeline with go out that line length customizes distributed vibration and strain sensing optical fiber, underwater sound wave detector and cable, fiber grating hydraulic pressure are taken into account transmission cable, optical fiber, cable and cable outer sheath are selected high density HDPE material, to reach good waterproof effect; According to the tubing attenuation characteristic of monitoring, determine installing space, quantity and the cable core number of underwater sound wave detector, underwater sound wave detector is sealed in cable, form an integral body with cable, adopt digital underwater sound detection cable in a cable, to be sealed at most thousands of sensors, significantly reduce cable core number simultaneously; According to the geographical elevation of buried depth of pipeline and pressure luffing scope, determine the distribution of fiber grating hydraulic gage.
2. distributed vibration and strain sensing optical fiber, underwater sound detector cable and fiber grating hydraulic gage transmission cable are installed in large-scale buried pressure water pipe, optical fiber need be fixed on inner-walls of duct, adopt bonding agent good with tubing adhesive property, environment-protecting asepsis, in cable and optical cable visual pipeline, flow velocity is local fixing, in tube wall bottom fixedly time, conventionally fixed point spacing is no more than 5m, at other position of pipe shaft, fixedly time, needs encryption.
3. optical fiber front end and terminal position need the punching of on-the-spot selection suitable position to draw pressure water pipe outside; front end sensing unit and end sensing unit are installed respectively; sensing optic cable, front end sensing unit, end sensing unit need be arranged in waterproof splice tray; for preventing that external environment is to front end sensing unit; the impact of end sensing unit and exit sensing optic cable; front end and end waterproof splice tray need to be arranged on and under earth's surface, be greater than 0.5 meter of degree of depth, and carry out vibration isolation and waterproofing protection.
4. complete the connection of distributed optical fiber vibration monitoring device, pipe vibration underwater sound detection analysis monitoring device and pipeline internal water pressure fiber grating dynamic monitor.
5. large-scale buried pressure water pipe recovers after water flowing, first monitor the basic datas such as the vibration that (comprises the keying of pipeline charging pump, all kinds of valves) under each operation condition, the underwater sound, hydraulic pressure, then the atmospheric valve on manual control pipeline is simulated seepage in various degree, the experimental data such as pipeline vibration, the underwater sound, hydraulic pressure while obtaining different operating modes, different leakiness, by alternate analysis, summarize suitable alarming threshold value.
The vibration producing in view of the pressure pipeline leakage of unlike material and the frequency of uttering long and high-pitched sounds, spread speed, attenuation characteristic are different, for guaranteeing early warning effect, after system is installed, need carry out continuous monitoring to vibration, noise and Simultaneous Pressure, by field trial, optimize early warning threshold values index, final foundation leaked comprehensive continuous monitoring and explosion early warning system.
Beneficial effect of the present invention is as follows:
1. the present invention is based in pressure water pipe seepage process and can produce jet, there is pipe vibration, utter long and high-pitched sounds and overpressure variation, adopt continuous monitoring method effectively to screen and cause the harmfulness seepage that booster occurs also accurately to locate seepage place, realize early warning before harmfulness seepage causes booster.
2. the present invention installs continuous monitoring signal collecting device in large-scale buried pressure water pipe, without excavation, buries underground, is convenient to system maintenance and upgrading.
3. the present invention adopts continuous monitoring technology, can carry out omnidistance continuous monitoring to large-scale buried pressure water pipe, have without monitoring blind area, precision is high, real-time good, be subject to accidentalia to affect little feature.This system also can be for newly-built large-scale pressure water pipe.
4. the present invention comprehensively adopts distributed optical fiber vibration and strain monitoring technology, pipe vibration underwater sound detection technology, pipeline internal water pressure fiber grating Dynamic Monitoring to monitor related physical parameter, and system can adapt to the multiple tubing that Inter-Basin Water Transfer Project adopts.
The above, not do any pro forma restriction to the present invention, and any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment all still belong to the protection domain of technical solution of the present invention.
Claims (4)
1. large-scale buried pressure water pipe seepage continuous monitoring method, based on producing jet in pressure water pipe seepage process, there is pipe vibration, utter long and high-pitched sounds and overpressure variation phenomenon in described method; This continuous monitoring method, is characterized in that: comprise the following steps:
(1) in large-scale pressure water pipe, arrange continuous monitoring signal collecting device, at pipeline, arrange signal measurement and analytical equipment outward;
(2) measure vibration, strain, sound wave and the pressure of monitored pressure water pipe when accidental conditions and change basis signal data; Simulate monitored pressure water pipe seepage process, measure the vibration, the strain that occur in seepage process, utter long and high-pitched sounds and variation in water pressure characteristic signal data;
(3) analyze monitored data, set up the model of the monitored pipeline work condition of reflection, determine extent of injury grade and threshold value of warning, judge module and dangerous situation release module are analyzed in exploitation;
(4) carry out the continuous monitoring of monitored pressure pipeline, while there are abnormal signal data, whether system automatic decision it caused by pipe leakage, judge whether these signals derive from same breakthrough and accurately locate breakthrough position, to deriving from the signal of same breakthrough, according to the extent of injury of vibration and the intensity of uttering long and high-pitched sounds, spectral characteristic and variation in water pressure data judgement seepage; When the extent of injury reaches threshold value of warning, issue alarm.
2. large-scale buried pressure water pipe seepage continuous monitoring method according to claim 1, it is characterized in that: in step (4) according to vibrating, utter long and high-pitched sounds, pressure change signal intensity is during along the position of the peaked location positioning leakage point of line distribution, adopts Spline Interpolation Method can improve leakage point position estimating precision.
3. large-scale buried pressure water pipe seepage continuous monitoring method according to claim 1, is characterized in that: this system involving vibrations, strain, sound wave and pressure monitoring device, analysis judge module, dangerous situation release module and network data transmission system.Vibration, strain, sound wave and pressure monitoring device are by being arranged at the signal collecting device in pipeline and being arranged at the surveying record installation composition outside pipeline; Analyze judge module for judging whether the distinctive signal collecting is caused by pipe leakage, judge whether various distinctive signals derive from same breakthrough and accurately locate breakthrough position, and according to the extent of injury of vibration and the intensity of uttering long and high-pitched sounds, spectral characteristic and variation in water pressure data judgement seepage; Dangerous situation release module is measured and dangerous situation data in monitor terminal issue, when the extent of injury reaches threshold value of warning, sends sound and light alarm, and also by network, the mobile phone to related personnel gives the alarm.
4. the explosion early warning system that utilizes large-scale buried pressure water pipe seepage continuous monitoring method according to claim 1, is characterized in that: comprise following composition:
(1) the continuous monitoring signal collecting device of arranging in large-scale pressure pipeline, comprises that distributed vibration and strain sensing optical fiber, underwater sound wave detector and cable, fiber grating hydraulic pressure takes into account transmission cable;
(2) signal measurement and the analytical equipment of outside large-scale pressure pipeline, arranging, comprise distributed optical fiber vibration and strain monitoring system, underwater sound wave detector acoustic vibration measurement mechanism, fiber grating water-pressure survey device;
(3) analyze judge module, dangerous situation release module;
(4) internet data transmission system.
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| CN107607265A (en) * | 2017-10-09 | 2018-01-19 | 中国水利水电科学研究院 | Seepage recognition positioning method and device based on temperature time-space distribution graph |
| CN108679457A (en) * | 2018-07-02 | 2018-10-19 | 中国水利水电科学研究院 | The online leak detection apparatus of pressure water pipe and method |
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| CN108679457A (en) * | 2018-07-02 | 2018-10-19 | 中国水利水电科学研究院 | The online leak detection apparatus of pressure water pipe and method |
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| CN114323246A (en) * | 2021-12-17 | 2022-04-12 | 北京特里尼斯石油技术股份有限公司 | Pipeline safety monitoring method and device |
| CN114508638A (en) * | 2022-04-19 | 2022-05-17 | 南通久鼎特种钢管有限公司 | Acousto-optic reminding type pipe joint for stainless steel pipe |
| CN115199859A (en) * | 2022-07-14 | 2022-10-18 | 重庆大学 | Rapid diagnosis method for leakage of long-distance underground pipeline |
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