CN109443425A - A kind of heat preservation conveyance conduit deformation of long range and leakage monitoring system - Google Patents
A kind of heat preservation conveyance conduit deformation of long range and leakage monitoring system Download PDFInfo
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- CN109443425A CN109443425A CN201811232777.5A CN201811232777A CN109443425A CN 109443425 A CN109443425 A CN 109443425A CN 201811232777 A CN201811232777 A CN 201811232777A CN 109443425 A CN109443425 A CN 109443425A
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- 239000000523 sample Substances 0.000 claims abstract description 27
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention discloses a kind of heat preservation conveyance conduit deformation of long range and leakage monitoring systems, mainly include chip distributive fiber optic strain sensor (1), probe rod type fiber grating temperature sensor (2), positioning stainless steel lathe dog (3), transmission cable (4), distribution type fiber-optic Brillouin demodulation module (5), fiber grating demodulation module (6), pipe deforming assessment module (7), pipe leakage assessment module (8) and pipeline general safety assessment center module (9).Pipeline general safety monitoring is carried out by the chip distributive fiber optic strain sensor (1), probe rod type fiber grating temperature sensor (2) perception pipe deforming and the caused temperature change of leakage that are mounted on long range insulating layer conveyance conduit.It is an advantage of the invention that material or physical property of the pipe deforming monitoring without the concern for insulating layer, it has wide range of applications, it is not only suitable for the deformation of underground and aboveground long range insulating layer conveyance conduit and leakage monitoring, and is suitble to the deformation monitoring of other rigid structures with insulating layer.
Description
Technical field
The invention belongs to long-distance pipe safety monitoring fields, and in particular to a kind of heat preservation conveyance conduit deformation of long range and
Leakage monitoring system.
Background technique
It is extremely severe that long-distance pipe passes through geological conditions, in various complex environment loads (freeze thawing, sedimentation), natural
Disaster (earthquake, mud-rock flow), traffic loading, artificial destruction (terroristic attack accounts for pressure for a long time, illegal excavates etc.) and material from
Under body aging etc. is single or many factors coupling, large deformation, the disastrous accidents such as leakage explosion easily occur for pipeline.With
Large quantities of newly-built pipeline projects are granted and the operation at full capacity of numerous military service pipelines, China's oil-gas pipeline come into " pipe
(shield) is supported in (reason)-prison/inspection (survey)-" stage, it takes effective monitoring means to be monitored pipeline configuration deformation and leakage, is
Pipeline service phase status assessment provides foundation, and riser tubing operation security extends pipeline service life, has great importance.
Long-distance pipe can be divided into insulating layer and without the pipeline of insulating layer.For the pipeline without insulating layer, have
The whole report with Study of local deformation of pipeline is carried out using distributed fiberoptic sensor and fiber-optic grating sensor.But it is right
In have insulating layer pipeline, the material of pipe insulating layer is numerous, as the thermal insulation material of above-ground line have rubber-plastic thermal insulation pipe road,
Glass wool rigid section, polyurethane foam and rock wool heat-preservation pipe；Underground piping mostly uses polyurethane foam+pitch glass fibre structure
At insulating layer and 3PE anti-corrosive steel tube erosion resistant coating (such as pipeline of transferring natural gas from the west to the east).Insulating layer is normal with certain thickness, such as oil field
The insulation layer thickness of rock wool heat-preservation pipe is 50-75mm, and pipeline of transferring natural gas from the west to the east 3PE anti-corrosive steel tube erosion resistant coating is with a thickness of 2.5-
3.7mm.This outer heat insulation layer material discreteness is big, and elasticity modulus and pipeline elasticity modulus mismatch, if directly by sensor
It is deployed to outside insulating layer, will lead to external sensor cannot monitor the deformation of pipeline well.At the same time, because having
Tiny leakage occurs for insulating layer, pipeline, and leaking medium is not easy to ooze out insulating layer, reported to use Distributed Optical Fiber Sensing Techniques
The technology for carrying out temperature line leakage is not suitable for the line leakage with insulating layer.Other pipe leakages are reported
Monitoring method, as leaking medium detection method (manual inspection, impingement), infrared scanning inspection, tube wall parameter are lossless
Detection method (flux-leakage detection method, ultrasonic Detection Method etc.), Principles of Acoustics method (stress wave, negative pressure wave method etc.) etc., are deposited
Leak positioning accuracy it is not high and monitoring poor in timeliness the disadvantages of.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of heat preservation conveyance conduit deformation of long range and leakage
Monitoring system.
The technical solution of the present invention is as follows: a kind of long range heat preservation conveyance conduit deformation and leakage monitoring system, including chip
Distributive fiber optic strain sensor 1, probe rod type fiber grating temperature sensor 2, positioning stainless steel lathe dog 3, transmission cable 4,
Distribution type fiber-optic Brillouin demodulation module 5, fiber grating demodulation module 6, pipe deforming assessment module 7, pipe leakage evaluate mould
Block 8 and pipeline general safety assessment center module 9, it is characterised in that: probe rod type fiber grating temperature sensor 2 passes through screw
It is fixed on chip distributive fiber optic strain sensor 1, then chip distributive fiber optic strain sensor 1 is stainless by positioning
Steel clamping band 3 is fixed on heat preservation conveyance conduit over long distances, is respectively connected to distribution type fiber-optic Brillouin demodulation by transmission cable 4
Module 5 and fiber grating demodulation module 6, demodulated strain and temperature information are passed respectively by wired or wireless mode
It transports to pipe deforming assessment module 7 and pipe leakage assessment module 8 carries out deformation and leakage evaluation；Pipe deforming assessment module 7
Pipeline general safety Evaluation Center mould is transmitted to by wired or wireless way with the evaluation result of pipe leakage assessment module 8
In block 9, pipe safety state is issued.
The chip distributive fiber optic strain sensor 1 is that two single mode optical fibers 10 use 11 chip of epoxy glass fiber
Molded package protection, wide 3cm, thick 3mm, length can be arbitrarily long；Sensor surface reserves a diameter along midline position interval 4m
For the circular hole of 2mm, the center of circle of circular hole is on the center line in sensor length direction.Two single mode optical fibers 10 are located at sensing
Lower inner surface on device, apart from respective outer surface 0.2mm, apart from center of circular hole 3mm.
The probe rod type fiber grating temperature sensor 2 includes that a diameter is 1mm, length 30mm capillary tubing 12
It is 4mm, the stainless steel cylindrical body 13 of length 40mm with a diameter.It packaged fiber grating sensor and is inserted in capillary tubing 12
Enter into stainless steel cylindrical body 13；It is 2mm, the band of a length of 30mm that a diameter is welded on the top of 13 one end of stainless steel cylindrical body
Externally threaded threaded rod 14.
Adsorbable oil gas is filled inside stainless steel cylindrical body 13 in the probe rod type fiber grating temperature sensor 2
Sponge 15.
The probe rod type fiber grating temperature sensor 2 passes itself threaded rod 14 across chip distributive fiber optic strain
Circular hole on sensor 1 is simultaneously screwed.
The chip distributive fiber optic strain sensor 1 and probe rod type fiber grating temperature sensor 2 is being fixed to length
When apart from insulating layer conveyance conduit, boring a diameter in the installation position of probe rod type fiber grating temperature sensor 2 in advance is
Then the stainless steel cylindrical body 13 of probe rod type fiber grating temperature sensor 2 is inserted into drilling and directes reach pipeline by the hole of 5mm
Ontology.Apply certain pre-stretching to chip distributed fiberoptic sensor 1, it is fixed with positioning stainless steel lathe dog 3 to be then spaced 8m
Sealing is filled into the drilling gap on insulating layer on pipeline, and with epoxy resin.
The stainless steel cylindrical body 13 is transmitted when pipeline deforms, by pipe deforming by stainless steel cylindrical body 13
To chip fiber Bragg grating strain sensor 1, chip fiber Bragg grating strain sensor 1 is made to generate curved drawing deformation；Pipeline leaks
When, the sponge 15 in stainless steel cylindrical body 13 adsorbs oil gas, and the fiber-optic grating sensor in corresponding capillary tubing 12, which perceives, to be inhaled
Temperature information after attached oil gas.
The chip distributive fiber optic strain sensor 1 and probe-type fiber grating temperature sensor 2 pass through biography respectively
Cable 4 is lost to connect with distribution type fiber-optic Brillouin demodulation module 5 and fiber grating demodulation module 6.
The demodulation of distribution type fiber-optic Brillouin demodulation module 5 is applied on chip distributive fiber optic strain sensor 1
Strain, and by wired or wireless mode by the strain information of acquisition be transferred to pipe deforming assessment module 7 carry out pipeline
Deformation calculates.
The fiber grating demodulation module 6 demodulates the probe rod type optical fiber light because of caused by temperature change caused by oil and gas leakage
The fluctuation of 2 raster center wavelength of grid temperature sensor, and by wired or wireless mode by the raster center wavelength wave of acquisition
Dynamic information is transferred to pipe leakage assessment module 8 and carries out pipe leakage evaluation.
The pipeline general safety assessment center module 9 deforms 7 He of assessment module by wired or wireless receiving pipeline
Respective analysis in pipe leakage assessment module 8 is as a result, issue pipe deforming or leakage event, and comment pipe safety
It is fixed.
The invention has the advantages that being invented based on distribution type fiber-optic Brillouin and local fiber grating sensing technology
A kind of deformation can be used for long range insulating layer conveyance conduit, leakage integrated monitor system, its advantage is that pipe deforming monitors
Without the concern for the material or physical property of insulating layer.The invention has wide range of applications, and is not only suitable for underground and aboveground over long distances
The deformation of insulating layer conveyance conduit and leakage monitoring, and it is suitble to the deformation monitoring of any rigid structure with insulating layer.
Detailed description of the invention
Fig. 1 is deformation and the leakage monitoring system schematic diagram that a kind of long range of the invention keeps the temperature conveyance conduit；
Fig. 2 is chip distributive fiber optic strain sensor structure schematic diagram；
Fig. 3 is probe rod type fiber grating temperature sensor structural schematic diagram；
Fig. 4 is chip distributive fiber optic strain sensor and probe rod type fiber grating temperature sensor in long range insulating layer
Layout diagram on conveyance conduit；
Fig. 5 is pipe deforming and leakage monitoring schematic diagram.
In figure: chip distributive fiber optic strain sensor 1, probe rod type fiber grating temperature sensor 2, positioning stainless steel
Clip 3, transmission cable 4, distribution type fiber-optic Brillouin demodulation module 5, fiber grating demodulation module 6, pipe deforming assessment module
7, pipe leakage assessment module 8, pipeline general safety assessment center module 9, single mode optical fiber 10, epoxy glass fiber 11, capillary
Steel pipe 12, stainless steel cylindrical body 13, threaded rod 14 and sponge 15.
Specific embodiment
A specific embodiment of the invention is described in detail below in conjunction with technical solution and attached drawing.
Attached drawing 1 is that a kind of long range of the invention keeps the temperature conveyance conduit deformation and leakage monitoring system schematic diagram.It is specific real
The mode of applying is that chip distributive fiber optic strain sensor 1 and probe rod type fiber grating temperature sensor 2 pass through positioning stainless steel card
Hoop 3 is mounted on pipeline, and temperature information caused by perceiving the pipe deforming of corresponding position and leaking, any two are adjacent to determine
The spacing of position stainless steel lathe dog 3 is 8m, and sensor is connected respectively to distribution type fiber-optic Brillouin by transmission cable 4 and solves mode transfer
Block 5 and fiber grating demodulation module 6；Distribution type fiber-optic Brillouin demodulation module 5 passes through the strain information collected wired
Or wirelessly it is transferred to progress pipe deforming analysis in pipe deforming assessment module 7；Fiber grating demodulation module 6 demodulates
The fluctuation of 2 raster center wavelength of probe rod type fiber grating temperature sensor because of caused by temperature change caused by oil and gas leakage, and
The raster center wavelength fluctuation information of acquisition pipe leakage assessment module 8 is transferred to by wired or wireless mode to carry out
Pipe leakage evaluation, pipe leakage assessment method are the time-histories temperature numbers monitored based on probe-type fiber grating temperature sensor 2
According to the temperature jump inflection point in identification time-histories temperature data determines incident of leakage.Pipeline general safety assessment center module 9 connects
Receive pipe deforming and leakage information from pipe deforming assessment module 7 and pipe leakage assessment module 8, to pipe safety into
Row total evaluation issues the safe condition of pipeline.
Fig. 2 is chip distributive fiber optic strain sensor structure schematic diagram.Specific embodiment is in epoxy resin and glass
During glass fiberizing sheet material, two single mode optical fibers 10 are implanted into thereon in 11 formed sheet formula of epoxy glass fiber
Lower inner surface, the position away from respective outer surface 0.2mm and apart from formed sheet center line 3mm, chip distribution light after molding
The fine wide 3cm of strain transducer, thick 0.3cm, length can be adjusted arbitrarily, along centreline space every the circle that 4m drill straight diameter is 2mm after molding
Hole, the center of circle of circular hole is on the center line in sensor length direction.
Fig. 3 is probe rod type fiber grating temperature sensor structural schematic diagram.Specific embodiment is first with capillary tubing 12
Packaged fiber grating sensor, capillary tubing diameter are 1mm, length 30mm；Then by the capillary steel of packaged fiber grating
Pipe 12 is inserted into inside the stainless steel cylindrical body 13 of diameter 4mm, length 40mm, and transmission line draws from 13 top side of stainless steel cylinder
Out, a diameter 2mm is welded at the top of stainless steel cylinder, length is the external screw thread threaded rod 14 of 30mm, while in stainless steel
The sponge 15 of adsorbable oil gas is filled in gap between cylindrical body 13 and capillary tubing 12, and effect is that oil gas leaks, and is inhaled
It is attached on sponge 15, is encapsulated in temperature change caused by the fiber-optic grating sensor perception oil and gas leakage in 13 in capillary tubing.
Fig. 4 is chip distributive fiber optic strain sensor and probe rod type fiber grating temperature sensor in long range insulating layer
Layout diagram on conveyance conduit.Specific embodiment is first by probe rod type fiber grating temperature sensor 2 across chip point
Circular hole on cloth fibre optic strain sensor 1, and be screwed.Then in pipe insulating layer and probe rod type fiber grating temperature
It spends on the corresponding position that sensor 2 is installed and bores the hole of 5mm, hole depth is determined by the thickness of insulating layer.When sensor is installed, it will visit
The stainless steel cylindrical body 13 of bar fiber grating temperature sensor 2 is inserted into the hole of insulating layer, directes reach pipeline body.The same time
Every the 8m fixed chip distributive fiber optic strain sensor 1 of positioning stainless steel lathe dog 3, before fixed, to chip distribution type fiber-optic
Strain transducer 1 carries out certain pre-stretching.Finally using epoxy resin sealing stainless steel cylindrical body 13 and insulating layer cavity
Between gap.
Fig. 5 is pipe deforming and leakage monitoring schematic diagram.When specific embodiment is that pipeline deforms, pipe deforming is logical
The transmitting of stainless steel cylindrical body 13 crossed in probe rod type fiber grating temperature sensor 2 is deformed to chip distributive fiber optic strain biography
Sensor 1, usually distributive fiber optic strain sensor 1 generates curved drawing deformation, is calculated according to the geometric dimension of pipeline and material properties
Obtain the deflection of pipeline.When pipeline leaks, the sponge 15 in stainless steel cylindrical body 13 adsorbs oil gas, leads to stainless steel
13 internal temperature of cylindrical body changes, and the fiber-optic grating sensor being encapsulated in capillary tubing 12 perceives corresponding temperature information, base
In the time-histories jump signal of temperature information, oil and gas leakage is detected.
Applicant combines Figure of description to be described in detail and describe the embodiment of the present invention, but this field skill
Art personnel are it should be understood that above embodiments are only the preferred embodiments of the invention, and explanation is intended merely to help reader in detail
More fully understand spirit of that invention, and it is not intended to limit the protection scope of the present invention, on the contrary, any based on invention of the invention
Any improvement or modification made by spirit should all be fallen within the scope and spirit of the invention.
Claims (7)
1. a kind of long range heat preservation conveyance conduit deformation and leakage monitoring system, including chip distributive fiber optic strain sensor
(1), in probe rod type fiber grating temperature sensor (2), positioning stainless steel lathe dog (3), transmission cable (4), distribution type fiber-optic cloth
Deep demodulation module (5), fiber grating demodulation module (6), pipe deforming assessment module (7), pipe leakage assessment module (8) and pipe
Road general safety assessment center module (9)；It is characterized by: probe rod type fiber grating temperature sensor (2) is screwed
On chip distributive fiber optic strain sensor (1), chip distributive fiber optic strain sensor (1) passes through positioning stainless steel lathe dog
(3) it is fixed on heat preservation conveyance conduit over long distances, and is respectively connected to distribution type fiber-optic Brillouin by transmission cable (4) and solves mode transfer
Block (5) and fiber grating demodulation module (6), demodulated strain and temperature information are passed respectively by wired or wireless mode
It transports to pipe deforming assessment module (7) and pipe leakage assessment module (8) carries out deformation and leakage evaluation；Pipe deforming evaluates mould
The evaluation result of block (7) and pipe leakage assessment module (8) is transmitted to pipeline general safety by wired or wireless mode and comments
Estimate in center module (9), issues pipe safety state.
2. a kind of long range heat preservation conveyance conduit deformation according to claim 1 and leakage monitoring system, it is characterized in that piece
Formula distributive fiber optic strain sensor (1) includes two single mode optical fibers (10) and epoxy glass fiber (11), in expoxy glass fibre
It ties up in (11) chip forming process, two single mode optical fibers (10) are implanted in the upper and lower of chip distributive fiber optic strain sensor (1)
Inner surface, apart from respective outer surface 0.2mm；The center line 3mm of range sensor length direction, is answered along chip distribution type fiber-optic
Become sensor (1) interval 4m and set diameter as the circular hole of 2mm, the center of circle of circular hole is on the center line in sensor length direction, piece
Formula distributive fiber optic strain sensor (1) width 3cm, thick 0.3cm, length are arbitrarily long.
3. a kind of long range heat preservation conveyance conduit deformation according to claim 1 and leakage monitoring system, it is characterized in that visiting
Rod-type fiber grating temperature sensor (2) includes capillary tubing (12), stainless steel cylindrical body (13), threaded rod (14) and sponge
(15), capillary tubing (12) diameter 1mm, length 30mm, fiber-optic grating sensor are encapsulated in inside capillary tubing；Stainless steel cylinder
Body (13) diameter 4mm, length 40mm, the top weld diameter of one end are the threaded rod (14) of 2mm, long 30mm；The capillary
Steel pipe (12) is inserted into stainless steel cylindrical body (13) inside, and transmission cable is drawn from stainless steel cylindrical body (13) top-side, no
The gap filling sponge to become rusty steel cylindrical body (13) between capillary tubing (12).
4. according to claim 1, a kind of deformation of the heat preservation of long range described in one of 2 and 3 conveyance conduit and leakage monitoring system,
It is characterized in that the threaded rod (14) on probe rod type fiber grating temperature sensor (2) passes through chip distributive fiber optic strain sensor
(1) circular hole on, and be screwed.
5. according to claim 1, a kind of deformation of the heat preservation of long range described in one of 2,3 and 4 conveyance conduit and leakage monitoring system,
It is characterized in that in long range insulating layer conveyance conduit position drill straight diameter corresponding with probe rod type fiber grating temperature sensor (2)
The circular hole of 5mm, hole depth are insulation layer thickness；It, will be stainless on probe rod type fiber grating temperature sensor (2) when laying sensor
Steel cylindrical body (13) is inserted into the circular hole of insulating layer, and is sealed with epoxy resin；It is fixed with positioning stainless steel lathe dog (3) to be spaced 8m
Chip distributive fiber optic strain sensor (1) before fixed, applies centainly pre- to chip distributive fiber optic strain sensor (1)
It stretches.
6. according to claim 1, a kind of deformation of the heat preservation of long range described in one of 2,3,4 and 5 conveyance conduit and leakage monitoring system
System, it is characterized in that distribution type fiber-optic Brillouin demodulation module (5) demodulation is applied on chip distributive fiber optic strain sensor (1)
Strain, and the strain information of acquisition is transferred to by pipe deforming assessment module (7) by wired or wireless mode and carries out pipe
Road deformation analysis；Fiber grating demodulation module (6) demodulates the probe rod type optical fiber light because of caused by temperature change caused by oil and gas leakage
The fluctuation of grid temperature sensor (2) raster center wavelength, and by wired or wireless mode by the raster center wavelength of acquisition
Fluctuation information is transferred to pipe leakage assessment module (8) and carries out pipe leakage evaluation.
7. according to claim 1, a kind of deformation of the heat preservation of long range described in one of 2,3,4,5 and 6 conveyance conduit and leakage monitoring
System, it is characterized in that pipeline general safety assessment center module (9) deforms assessment module (7) by wired or wireless receiving pipeline
With analysis respective in pipe leakage assessment module (8) as a result, issuing pipe deforming or leakage event, and carry out to pipe safety
Evaluation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811232777.5A CN109443425B (en) | 2018-10-23 | 2018-10-23 | Long-distance heat-preservation conveying pipeline deformation and leakage monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811232777.5A CN109443425B (en) | 2018-10-23 | 2018-10-23 | Long-distance heat-preservation conveying pipeline deformation and leakage monitoring system |
Publications (2)
| Publication Number | Publication Date |
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| CN109443425A true CN109443425A (en) | 2019-03-08 |
| CN109443425B CN109443425B (en) | 2024-01-30 |
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| CN201811232777.5A Active CN109443425B (en) | 2018-10-23 | 2018-10-23 | Long-distance heat-preservation conveying pipeline deformation and leakage monitoring system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131486A (en) * | 2019-04-17 | 2019-08-16 | 北京百世通管道科技有限公司 | Optical fiber compound pipeline complex pipeline and its monitoring system and method for early warning |
| CN111022833A (en) * | 2019-12-10 | 2020-04-17 | 张声振 | Direct-buried heat-insulation steam pipe with pipeline leakage monitoring function |
| CN112629428A (en) * | 2020-11-30 | 2021-04-09 | 中山市精量光电子科技有限公司 | Device for accurately arranging fiber grating sensors in oil production pipeline |
| CN112856251A (en) * | 2021-02-23 | 2021-05-28 | 唐山市智明电子科技有限公司 | Oil gas pipeline monitoring system based on fiber bragg grating |
| CN113503844A (en) * | 2021-07-12 | 2021-10-15 | 浙江大学 | System and method for detecting sinking hollow-out characteristics of pipeline heat-insulating layer |
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