CN1587945A - Sensitive optical cable for long distance oil-gas pipeline safety detection - Google Patents
Sensitive optical cable for long distance oil-gas pipeline safety detection Download PDFInfo
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- CN1587945A CN1587945A CN 200410073072 CN200410073072A CN1587945A CN 1587945 A CN1587945 A CN 1587945A CN 200410073072 CN200410073072 CN 200410073072 CN 200410073072 A CN200410073072 A CN 200410073072A CN 1587945 A CN1587945 A CN 1587945A
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- optical fiber
- rubber rope
- sleeve pipe
- circular hole
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Abstract
The invention discloses a sensing optical fiber for testing safety of long-distance oil-and-gas pipeline, including a rubber rope with first and second circular holes eccentricly installed on two sides of its central diameter, tight bush whose elastic modulus changes periodically with sensing optical fiber in it and a beam of tension resistance yarn placed paralleled with it are installed in the first circular hole, loose bush wherein are several optical fiber used to communicate to communicate and another beam of tension resistance placed paralleled with it are installed in the second circular hole. Besides the second circular hole is a layer of net cloth layer than 1/2 of rubber rope circumference and it is spirally wraped and fixed fixed by metal wire, having the same diameter with rubber rope and circumference of the diameter is packed successively by spiral metal wire mental wire and outer layer. Pipeline leaking and outer incident which may do harm to pipeline safety are accurately positioned through measurement to deflection light power of sensing optical fiber in sensing optical fiber along the pipeline.
Description
Technical field
The invention belongs to input and analysis technical field, relate to a kind of structural design of sensing optic cable, particularly a kind of sensing optic cable that is used for the oil-gas pipeline safety detection.
Background technology
At present, the detection method that is used for gas oil pipe leakage is a lot, mainly contains based on detection method in the pipe of pitching technology such as magnetic flux, eddy current, shooting, also claims the pipeline machine of creeping; External detection method based on operational factors such as pipeline pressure, temperature, flow, vibrations comprises difference in flow, pressure differential, suction wave and sonic method.The advantage of detection method is the bearing accuracy height in the pipe, and shortcoming is onlinely to detect, and stops up easily, accident such as stoppage in transit, to the requirements for pipes harshness.The advantage of external detection method is continuously that real-time online detection and expense are low, and shortcoming is that bearing accuracy is low, fails to report and the rate of false alarm height, can not monitor and forecast leakage hidden danger to the external event that may jeopardize pipe safety.
For example negative pressure wave method is by judging to the monitoring of the pressure signal of pipe ends whether oil and gas pipes takes place to leak and the position.When leakage took place, because the pressure differential inside and outside the pipeline, the pressure of leakage position descended rapidly, produced respectively the upwards transient negative pressure ripple of downstream propagation, determined the position of leaking according to the mistiming at negative pressure velocity of wave propagation and arrival two ends.Because the loss that the transient negative pressure ripple is propagated is big especially, propagation distance is limited, adds the restriction of pressure transducer sensitivity, and this method is suitable for the bigger situation of leakage rate, and exists bearing accuracy low, can not forecast shortcomings such as leaking hidden danger.Therefore, little for amount, leakage and water clock that the time is long are even use highly sensitive pressure transducer and flowmeter effectively to detect leakage in pipe ends.
Become the focus of gas oil pipe leakage detection technique research based on the gas oil pipe leakage detection technique of distributing optical fiber sensing technology.J.Buerck, the Mexican Antonio Carrillo of the Alistair MacLeana of Britain, Germany and people such as R.M.L ó pez have proposed similarly the structure based on the sensing optic cable of bending loss of optical fiber respectively in its paper, be fixed on after the tinsel that it is twined by a spiral coats an optical fiber on the right cylinder of being made by polymkeric substance (polymer).Polymkeric substance absorbs the oil gas that leaks and expands, and causes fibre-optical bending, loss occurs.Realize the location of leakage by OTDR (Optical Time DomainReflectometry).The size of pressure and vibration signal (intensity is relevant with leaking) detects near the pipeline that the optical cable of this structure can not cause pipe leakage, can not effectively detect the external event that may jeopardize pipe safety (as: crustal subsidence, pressurized are excessive, near the pipeline big machinery construction and artificial destruction etc.).
Summary of the invention
Problem at above-mentioned prior art exists the objective of the invention is to, and proposes a kind of sensing optic cable that long distance oil-gas pipeline safety detects that is used for.
To achieve these goals, technical thought of the present invention is that near sensing optic cable of parallel laying oil and gas pipes, this sensing optic cable are used to pick up the pipeline pressure on every side and the oil and gas leakage of vibration signal and detection pipeline.
Technical solution of the present invention is that a kind of sensing optic cable that is used for the oil-gas pipeline safety detection comprises a rubber rope, the central diameter both sides on the rubber rope internal diameter have and rubber rope off-centre is provided with first circular hole and second circular hole; It is characterized in that, be equipped with in first circular hole tight sleeve pipe with a branch of high strength aramid fiber yarn that is used to provide tensile strength of the parallel placement of tight sleeve pipe, in the periodically variable tight sleeve pipe of elastic modulus sensor fibre is housed; The high strength aramid fiber yarn that loose sleeve pipe and another bundle with the parallel placement of loose sleeve pipe are used to provide tensile strength is installed in second circular hole, has many to be used for the optical fiber of communicating by letter between the pipeline control website in the loose sleeve pipe; Second circular hole, one side of rubber rope is provided with the screen cloth of one deck greater than 1/2 rubber rope circumference, and screen cloth is fastened by spiral metal wire, forms isodiametric circumference with rubber rope, and bag is carried out spiral metal wire and skin are arranged successively on the circumference of this diameter.
Another characteristics of the present invention are described sensor fibres and to be used to control the optical fiber of communicating by letter between the website be single-mode fiber or multimode optical fiber.
When adopt long distance oil-gas pipeline safety of the present invention to detect sensing optic cable along pipeline laying, when the external event generation that maybe may jeopardize pipe safety takes place to leak ducted oil gas, the external force of generation will change the characteristic and the loss of sensor fibre in the sensing optic cable; When pipeline generation oil and gas leakage or seepage (water clock), the wrappage of sensing optic cable are met fry dried food ingredients and are given birth to expansion, and sensor fibre bends, and loss occurs.By the measurement to the backscattering luminous power of sensor fibre, the measurement and the location of finishing the quiescent dissipation of each point on the optical fiber; By measurement, finish the measurement of sensor fibre total losses dynamic change and the judgement of fault type to the Output optical power of sensor fibre.The loss that incidents such as oil and gas pipes leaks, crustal subsidence, pressurized are excessive, near the mechanical execution the pipeline and artificial destruction produce sensor fibre has different amplitude-frequency characteristics, by data being analyzed and being merged, judge and accurately locate the generation of incidents such as oil and gas leakage.
Description of drawings
Fig. 1 is the cross section structure figure of the sensing optic cable of oil-gas pipeline safety detection of the present invention;
Fig. 2 is the structural representation of the sensing optic cable of oil-gas pipeline safety detection of the present invention;
Fig. 3 is the sensor fibre of sensing optic cable and the structure example figure of tight sleeve pipe thereof;
Fig. 4 is the expansion curve of packing material rubber in gasoline of sensing optic cable;
Fig. 5 is the sensing optic cable curve that Output optical power changes during the packing material rubber swelling in gasoline.
Specific embodiment below in conjunction with accompanying drawing and inventor finish according to technical scheme is described in further detail principle of the present invention.
Embodiment
Referring to Fig. 1, Fig. 2 and Fig. 3, the sensing optic cable that this oil-gas pipeline safety detects comprises a rubber rope 140, and the central diameter both sides on rubber rope 140 internal diameters have and rubber rope 140 eccentric first circular hole 114 and second circular holes 155 that are provided with; Be equipped with in first circular hole 114 tight sleeve pipe 120 with a branch of high strength aramid fiber yarn 113 that is used to provide tensile strength of tight sleeve pipe 120 parallel placements, in the center hole 123 of tight sleeve pipe 120 sensor fibre 110 is housed; There are loose sleeve pipe 153 and another bundle to be used to provide the high strength aramid fiber yarn 152 of tensile strength in second circular hole 155, have many to be used for the optical fiber 151 of communicating by letter between the pipeline control website in the loose sleeve pipe 153; One side of second circular hole 155 of rubber rope 140 is provided with the screen cloth 131 of one deck greater than 1/2 rubber rope, 140 circumference, and screen cloth 131 is fixing by the tinsel 133 that spiral twines, form isodiametric circumference with rubber rope 140, the bag shoe has spiral metal wire 133 and outer 134 successively on the circumference of this diameter.
Being used to control the optical fiber 151 of communicating by letter between the website can be single-mode fiber, also can be multimode optical fiber.In the pine sleeve pipe 153 many telecommunication optical fibers 151 are housed.In dress telecommunication optical fiber 151 loose sleeve pipe 153 and a branch ofly be used for providing the high strength aramid fiber yarn 152 of tensile strength to be placed in the circular hole 155 of rubber rope off-center near outside surface.Gap between circular hole 155 and loose sleeve pipe 153 is colloidal material 156 abrim, in case telecommunication optical fiber 151 is destroyed because moisture is invaded.High strength aramid fiber yarn 152 is used to provide tensile strength to prevent that telecommunication optical fiber 151 from too being stretched.
Outer 134 is protective seams, is coated on the outside surface of the tinsel 133 that screen cloth 131 and spiral twine, with the inner body of protection sensing optic cable.
Make the material selection natural rubber or the butyl rubber of rubber rope 140, volume can expand when the rubber rope of making of their 140 contacted petroleum product such as oil gas or gasoline.Outer 134 manufacturing materials also is natural rubber or butyl rubber, and adds some auxiliary materials, and the auxiliary material of adding is with the acid-fast alkali-proof that improves rubber and characteristic such as anti-aging, thereby can improve the serviceable life of the sensing optic cable that elastomeric material makes.
One side of the telecommunication optical fiber 151 of rubber rope 140 is wrapped up by screen cloth 131, and screen cloth 131 is fixed on the rubber rope 140 by the tinsel 133 that spiral twines.Screen cloth 131 is embedded in one group of tinsel 132.Screen cloth 131 can prevent that rubber rope 140 from too being stretched on the one hand, expands to sensor fibre 110 1 sides when it makes elastomeric material meet oil with spiral metal wire 133 simultaneously.Expansion makes sensor fibre 110 bendings, produces loss.
When optical cable was crooked, telecommunication optical fiber 151 1 sides had screen cloth 131 and tinsel 132 protections, are difficult for stretching, and curved major will occur in sensor fibre 110 1 sides.Fig. 3 is the structure example figure of sensor fibre 110 and tight sleeve pipe 120.When the tight sleeve pipe 120 of interior dress sensor fibre 110 was crooked, the not flexible and low part 122 of the high part of sleeve pipe 120 elastic modulus 121 was crooked easily, thereby the radius-of-curvature of sensor fibre 110 local bendings reduces in the sleeve pipe, and loss increases.
Make the material selection natural rubber or the butyl rubber of rubber rope 140.For example be made into the rubber survey sheet of 10mm * 10mm * 0.5mm with natural rubber, Fig. 4 is the expansion curve (Δ H) that 14 layers of rubber are surveyed sheet stack back short transverse in gasoline, proving installation forms the pressure of 70g in the above, so it can form suitable bulging force in very short time.
When being output as P
0The time, wherein one section 3.6m is long, the cable of external diameter 6mm is immersed in the gasoline, and Fig. 5 is that the optical fiber Output optical power is schemed over time.As can be seen from Figure 5, when t=1min, the Output optical power P of optical fiber
0Drop to 0.2.Therefore it can detect fuel-displaced leakage in a short period of time.
When adopt long distance oil-gas pipeline safety of the present invention to detect sensing optic cable along pipeline laying, when ducted oil gas takes place to leak or the external event of possible entail dangers to pipe safety takes place near pipeline, the external force of generation will change the characteristic and the loss of sensor fibre in the sensing optic cable; When pipeline generation oil and gas leakage or seepage (water clock), the wrappage of sensing optic cable are met oil gas and are expanded, and expanding bends sensor fibre, produces loss.By the measurement to sensor fibre backscattering luminous power in the sensing optic cable, the measurement and the location of finishing the quiescent dissipation of each point on the optical fiber; By measurement, finish the measurement of sensor fibre total losses dynamic change and the judgement of fault type to the Output optical power of sensor fibre.The loss that incidents such as oil and gas pipes leaks, crustal subsidence, pressurized are excessive, near the mechanical execution the pipeline and artificial destruction produce sensor fibre has different amplitude-frequency characteristics, by data being analyzed and being merged, judge and accurately locate the generation of incidents such as oil and gas leakage.
Claims (4)
1. one kind is used for the sensing optic cable that long distance oil-gas pipeline safety detects, and comprises a rubber rope (140), and the central diameter both sides on rubber rope (140) internal diameter have and eccentric first circular hole (114) and second circular hole (155) that is provided with of rubber rope (140); It is characterized in that, be equipped with in first circular hole (114) tight sleeve pipe (120) with a branch of high strength aramid fiber yarn (113) that is used to provide tensile strength of the parallel placement of tight sleeve pipe (120), sensor fibre (110) is housed in the periodically variable tight sleeve pipe of elastic modulus (120); There are loose sleeve pipe (153) and another bundle to be used to provide the high strength aramid fiber yarn (152) of tensile strength in second circular hole (155), have many to be used for the optical fiber (151) of communicating by letter between the pipeline control website in the loose sleeve pipe (153) with the parallel placement of loose sleeve pipe (153); One side of second circular hole (155) of rubber rope (140) is provided with the screen cloth (131) of one deck greater than 1/2 rubber rope (140) circumference, and screen cloth (131) is fastened by tinsel (133) spiral, form isodiametric circumference with rubber rope (140), the bag shoe has spiral metal wire (133) and outer (134) successively on the circumference of this diameter.
2. as claimed in claim 1ly be used for the sensing optic cable that long distance oil-gas pipeline safety detects, it is characterized in that, described sensor fibre (110) and to be used to control the optical fiber (151) of communicating by letter between the website be single-mode fiber or multimode optical fiber.
3. the sensing optic cable that is used for the long distance oil-gas pipeline safety detection as claimed in claim 1, it is characterized in that, the material selection natural rubber or the butyl rubber of described making rubber rope 140 and skin 134, volume expanded when they contacted petroleum product such as oil gas or gasoline, expanded sensor fibre is bent and to produce loss.
4. as claimed in claim 1ly be used for the sensing optic cable that long distance oil-gas pipeline safety detects, it is characterized in that, the elastic modulus that the tight sleeve pipe (120) of sensor fibre (110) is housed in described is cyclical variation.
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| CNB2004100730725A CN1293375C (en) | 2004-09-13 | 2004-09-13 | Sensitive optical cable for long distance oil-gas pipeline safety detection |
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| CNB2004100730725A CN1293375C (en) | 2004-09-13 | 2004-09-13 | Sensitive optical cable for long distance oil-gas pipeline safety detection |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607775A (en) * | 2006-04-18 | 2012-07-25 | 邓录普石油与海洋有限公司 | Leak detector using an optical fibre |
| CN103282757A (en) * | 2010-12-30 | 2013-09-04 | 伊顿公司 | Leak detection system |
| CN103697334A (en) * | 2013-12-27 | 2014-04-02 | 青岛厚科化学有限公司 | Sleeve type automatic early warning system for underground buried object |
| CN105022131A (en) * | 2015-08-05 | 2015-11-04 | 苏州大学 | Sensing cable for leakage monitoring of long-distance tunnels/pipelines |
| CN105115675A (en) * | 2015-09-11 | 2015-12-02 | 中国石油化工股份有限公司 | Leakage detection system for buried double-layer oil tank interlayer |
| US9291521B2 (en) | 2010-12-30 | 2016-03-22 | Eaton Corporation | Leak detection system |
| CN105911638A (en) * | 2016-05-10 | 2016-08-31 | 河海大学 | Sensing fiber seepage measurement sensibilization device and use method |
| WO2017118145A1 (en) * | 2016-01-08 | 2017-07-13 | 烽火通信科技股份有限公司 | Combined flexible oil-gas pipe having optical fiber communication function and monitoring function |
| CN108375816A (en) * | 2018-02-07 | 2018-08-07 | 无锡亚天光电科技有限公司 | The cable configuration of oil suction expansion |
| CN108760162A (en) * | 2018-05-23 | 2018-11-06 | 北京目黑科技有限公司 | leakage detection device and method |
| CN108799845A (en) * | 2018-07-12 | 2018-11-13 | 北京目黑科技有限公司 | A kind of leakage detection device and its Oil Leakage Detecting cable and detection method |
| CN110274731A (en) * | 2018-03-13 | 2019-09-24 | 中国石油化工股份有限公司 | A kind of External floating roof tank central drain leakage monitor based on Fibre Optical Sensor |
| CN113738960A (en) * | 2021-08-11 | 2021-12-03 | 临海伟星新型建材有限公司 | Intelligent conveying pipeline capable of displaying pipeline blockage position |
| CN117490003A (en) * | 2024-01-02 | 2024-02-02 | 福伦瑞生科技(苏州)有限公司 | Oil-sensing optical fiber sensing system |
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| GB2062877B (en) * | 1979-11-15 | 1984-03-07 | Avon Rubber Co Ltd | Method and device for detecting leaks from pipelines |
| JPS57106838A (en) * | 1980-12-24 | 1982-07-02 | Fujitsu Ltd | Optical fiber for sensor |
| JPS60166837A (en) * | 1984-12-25 | 1985-08-30 | Hitachi Cable Ltd | Detection of leaked oil |
| JPH0518848A (en) * | 1991-07-09 | 1993-01-26 | Toshiba Corp | Leak-detection device |
| CN2567548Y (en) * | 2002-09-13 | 2003-08-20 | 西安石油学院 | Fibre-optical grating sensor for testing gas-oil pipe |
| CN1164886C (en) * | 2002-12-10 | 2004-09-01 | 西安交通大学 | Oil gas pipeline leak intelligent on line monitoring method based on distribution type optical fibre sensor |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607775A (en) * | 2006-04-18 | 2012-07-25 | 邓录普石油与海洋有限公司 | Leak detector using an optical fibre |
| US9897508B2 (en) | 2010-12-30 | 2018-02-20 | Eaton Corporation | Leak detection system |
| US9291521B2 (en) | 2010-12-30 | 2016-03-22 | Eaton Corporation | Leak detection system |
| CN103282757B (en) * | 2010-12-30 | 2016-08-10 | 伊顿公司 | Leak detection system |
| CN103282757A (en) * | 2010-12-30 | 2013-09-04 | 伊顿公司 | Leak detection system |
| CN103697334A (en) * | 2013-12-27 | 2014-04-02 | 青岛厚科化学有限公司 | Sleeve type automatic early warning system for underground buried object |
| CN103697334B (en) * | 2013-12-27 | 2016-03-30 | 青岛厚科化学有限公司 | A kind of bushing type underground installation automatic early-warning system |
| CN105022131A (en) * | 2015-08-05 | 2015-11-04 | 苏州大学 | Sensing cable for leakage monitoring of long-distance tunnels/pipelines |
| CN105022131B (en) * | 2015-08-05 | 2019-02-01 | 苏州大学 | A kind of sensing optic cable monitored for long distance tunnel/pipe leakage |
| CN105115675A (en) * | 2015-09-11 | 2015-12-02 | 中国石油化工股份有限公司 | Leakage detection system for buried double-layer oil tank interlayer |
| WO2017118145A1 (en) * | 2016-01-08 | 2017-07-13 | 烽火通信科技股份有限公司 | Combined flexible oil-gas pipe having optical fiber communication function and monitoring function |
| CN105911638A (en) * | 2016-05-10 | 2016-08-31 | 河海大学 | Sensing fiber seepage measurement sensibilization device and use method |
| CN105911638B (en) * | 2016-05-10 | 2018-10-23 | 河海大学 | Enhanced sensitivity device and application method are oozed in a kind of survey of sensor fibre |
| CN108375816A (en) * | 2018-02-07 | 2018-08-07 | 无锡亚天光电科技有限公司 | The cable configuration of oil suction expansion |
| CN110274731B (en) * | 2018-03-13 | 2021-01-15 | 中国石油化工股份有限公司 | Leakage monitoring device for central drain pipe of external floating roof storage tank based on optical fiber sensing |
| CN110274731A (en) * | 2018-03-13 | 2019-09-24 | 中国石油化工股份有限公司 | A kind of External floating roof tank central drain leakage monitor based on Fibre Optical Sensor |
| CN108760162A (en) * | 2018-05-23 | 2018-11-06 | 北京目黑科技有限公司 | leakage detection device and method |
| CN108799845A (en) * | 2018-07-12 | 2018-11-13 | 北京目黑科技有限公司 | A kind of leakage detection device and its Oil Leakage Detecting cable and detection method |
| CN113738960A (en) * | 2021-08-11 | 2021-12-03 | 临海伟星新型建材有限公司 | Intelligent conveying pipeline capable of displaying pipeline blockage position |
| CN117490003A (en) * | 2024-01-02 | 2024-02-02 | 福伦瑞生科技(苏州)有限公司 | Oil-sensing optical fiber sensing system |
| CN117490003B (en) * | 2024-01-02 | 2024-03-12 | 福伦瑞生科技(苏州)有限公司 | Oil-sensing optical fiber sensing system |
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