CN205808361U - Spigot-and-socket pipe joint deformation measuring device based on distributive fiber optic strain sensor - Google Patents
Spigot-and-socket pipe joint deformation measuring device based on distributive fiber optic strain sensor Download PDFInfo
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- CN205808361U CN205808361U CN201620725248.9U CN201620725248U CN205808361U CN 205808361 U CN205808361 U CN 205808361U CN 201620725248 U CN201620725248 U CN 201620725248U CN 205808361 U CN205808361 U CN 205808361U
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- 239000003292 glue Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 14
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- 238000012544 monitoring process Methods 0.000 abstract description 29
- 230000036541 health Effects 0.000 abstract description 8
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- 229920000647 polyepoxide Polymers 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000007797 corrosion Effects 0.000 description 1
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- 238000009795 derivation Methods 0.000 description 1
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Abstract
A kind of Spigot-and-socket pipe joint deformation measuring device based on distributive fiber optic strain sensor, belongs to monitoring structural health conditions field.This measurement apparatus includes three distribution type fiber-optics and three arch measurement apparatus, and three arch measurement apparatus are distributed on around Spigot-and-socket pipe joint；One end of arch measurement apparatus is fixed on the outer wall inserting head, and the other end is fixed on the outer wall of socket joint head, and distribution type fiber-optic is in turn secured to insert on the outer wall of head, in arch optical fiber duct and on the outer wall of socket joint head.The outside of arch measurement apparatus is provided with the protection shell being fixed on spigot-and-socket pipe.This measurement apparatus can be properly functioning after protecting its embedment underground, distribution type fiber-optic can be made to measure the deformation of Spigot-and-socket pipe joint, widen the distribution type fiber-optic range of application in pipeline health monitoring, and simple operation, simple and practical.By the deformation state of the actual pipe joint of Analysis on monitoring data, can find in time when dangerous deformations occurs in bell socket.
Description
Technical field
This utility model relates to a kind of Spigot-and-socket pipe joint deformation measurement based on distributive fiber optic strain sensor dress
Put, belong to monitoring structural health conditions field.
Background technology
Along with the development of Chinese Urbanization's, water-supply systems increasingly become a Modernized City Construction and send out
Open up requisite foundation engineering.Wherein, the structural safety of water supply line is particularly critical.The deformation of water supply line, destruction are led
The tap water caused pollutes, surface gathered water suspends the emergencies such as water supply and will bring to the daily life of urbanite with some areas
Many inconvenience.Therefore, the most accurately understanding the ruuning situation of groundwater supply pipeline, the configuration state knowing water supply line in time becomes
For the most difficult and challenging work.
Among all kinds of water supply lines, socket type pipeline is most commonly seen.Owing to the connection between each section of socket type pipeline is
Being completed by T-shaped rubber ring, for flexibly connecting, for the overall construction intensity of pipeline, its seam intensity is bright
Aobvious weakness.Great mass of data shows, underground piping destroys and mostly occurs at pipe joint.Destruction at pipe joint mainly shows
Being two kinds of forms, one is that transverse curvature is destroyed；Another is that axial tension destroys.Therefore it is integrally-built at socket type pipeline
In health monitoring, the monitoring of its seam is particularly important,
Owing to flexible water supply line has the characteristic such as distance, buried circumstance complication, thus healthy and safe at numerous pipelines
In the middle of monitoring method, optical fiber sensing monitoring technology has distributed, distance, real-time, corrosion-resistant, electromagnetism interference by it
Etc. feature, become the new focus of the healthy and safe monitoring of pipeline.The operation principle of distribution type fiber-optic is to use optical fibers as biography simultaneously
Sense sensing element and transmission signal media, and based on Brillouin scattering principle, in conjunction with optical time domain reflection technology, optical time-domain analysis skill
Art or light frequency-domain analysis technology, detectable go out along the strain of diverse location in spread fiber path and variations in temperature, it is achieved real
Distributed measurement.Its transmission sensing one, low testing cost, therefore become the most with the fastest developing speed, apply
For one of monitoring pipeline safety technology widely.
In recent years, pipeline health monitoring technique developed towards diversification, integration, the direction of just-in-time.Application publication number
CN103733040A, Shen Qing Publication day 2014.04.16, with optical fiber distributed acoustic sensor, by monitoring pipeline diverse location
Acoustical signal pipeline is carried out safety monitoring；Chinese utility model patent application publication number CN103968257A, Shen Qing Publication day
2014.08.06, a kind of Fibre Optical Sensor based on gridding of utility model, the method that underground piping is carried out whole monitoring.
Optical fiber sensing technology, in the middle of compliance pipe safety health monitoring, the most increasingly receives publicity.Shen Qing Publication
Number CN103630265A, Shen Qing Publication day 2014.03.12, a kind of flexible duct temperature based on distribution type fiber-optic of utility model
The on-line monitoring method of degree；China utility model Authorization Notice No. CN204142402U, authorized announcement date 2015.02.04, pass through
To the design of distributed fiberoptic sensor, arrange, transmit, aspect design and the innovation such as signal processing, comprehensively elaborate optical fiber
A kind of practical approach in terms of water supply line safety monitoring.
The health monitoring of distributed optical fiber pipeline is primarily directed to the deformation of pipeline and is monitored, and can be long to pipeline
The monitoring of range distribution formula needs to meet two monitoring of environmental conditions: one is that needs optical fiber is attached at tube surfaces, and keeps optical fiber
Opposite linear, it is impossible to have a bigger bending, the light loss otherwise caused by bending will make the availability of optical fiber measurement with accurately
Property is substantially reduced.Two is owing to the local tension of optical fiber is more weak, and extreme value is about 20000 microstrains, therefore when pipeline local
When large strain occurs, it will cause optical fiber cannot bear and rupture.
And when for spigot-and-socket water supply line, due to complexity and the above-mentioned fiber optic conduction of Spigot-and-socket pipe joint structure
Particularity, cause monitoring method that fiber-optic monitoring used in terms of Spigot-and-socket pipe joint, device innovation with application then
Very few.And the measurement apparatus designed by this patent and measuring method are just mainly for the health status of Spigot-and-socket pipe joint
Be monitored, by the deformation state of the actual pipe joint of Analysis on monitoring data, when there is dangerous deformations in bell socket can and
Shi Faxian.
Summary of the invention
This utility model provides a kind of Spigot-and-socket pipe joint deformation measurement based on distributive fiber optic strain sensor dress
Putting, due to complexity and the particularity of above-mentioned Fibre Optical Sensor of Spigot-and-socket pipe joint structure, this measurement apparatus is mainly for holding
The configuration state inserting formula pipe joint is monitored, and by the deformation state of the actual pipe joint of Analysis on monitoring data, works as socket joint
Can find in time when dangerous deformations occurs in interface.
The technical solution adopted in the utility model is: a kind of socket type pipeline based on distributive fiber optic strain sensor connects
Mouth deformation measuring device, it includes that spigot-and-socket pipe inserts head, T-shaped sealing rubber ring and spigot-and-socket pipe socket joint head, T-shaped caulking gum
After circle is placed in the seal groove of spigot-and-socket pipe socket joint head, inserting spigot-and-socket pipe and insert head, it also includes three distribution type fiber-optics
With three arch measurement apparatus, three arch measurement apparatus are distributed on around Spigot-and-socket pipe joint；Described arch measures dress
One end glue put is fixed on spigot-and-socket pipe and inserts on the outer wall of head, and other end glue is fixed on the outer wall of spigot-and-socket pipe socket joint head
On, described distribution type fiber-optic (1) glue is in turn secured on the outer wall of spigot-and-socket pipe insertion head, the arch light of arch measurement apparatus
In fine groove and on the outer wall of spigot-and-socket pipe socket joint head；The outside of described arch measurement apparatus is provided with is fixed on spigot-and-socket pipe insertion head
Left protection shell on outer wall and the right protection shell being fixed on spigot-and-socket pipe socket joint head outer wall, described left protection shell is with right
Protection shell is closely packed together, and on the left of the left end employing of left protection shell, sealing baffle is closed, and the right-hand member of right protection shell uses
Right side sealing baffle is closed.
The beneficial effects of the utility model are: this Spigot-and-socket pipe joint deformation measuring device includes three distributed light
Fibre and three arch measurement apparatus, three arch measurement apparatus are distributed on around Spigot-and-socket pipe joint；Arch measurement apparatus
One end glue be fixed on spigot-and-socket pipe insert head outer wall on, other end glue is fixed on the outer wall of spigot-and-socket pipe socket joint head
On, distribution type fiber-optic glue is in turn secured to spigot-and-socket pipe and inserts on the outer wall of head, in the arch optical fiber duct of arch measurement apparatus
With on the outer wall of spigot-and-socket pipe socket joint head.The outside of arch measurement apparatus is provided with the protection shell being fixed on spigot-and-socket pipe.Should
Measurement apparatus can be properly functioning after protecting its embedment underground, and distribution type fiber-optic can be made to measure the deformation feelings of Spigot-and-socket pipe joint
Condition, widens the distribution type fiber-optic range of application in pipeline health monitoring, and simple operation, simple and practical.By monitoring number
According to the deformation state of the actual pipe joint of analysis, can find in time when dangerous deformations occurs in bell socket.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings this utility model is further illustrated.
Fig. 1 is the structure front view of Spigot-and-socket pipe joint deformation measuring device.
Fig. 2 is the A-A view in Fig. 1.
Fig. 3 is the structure front view of arch measurement apparatus.
Fig. 4 is the B-B view in Fig. 3.
Fig. 5 is end cover structure figure.
The deformation schematic diagram of pipeline when Fig. 6 is pipe joint stretching X mm.
Fig. 7 be pipe joint bend Y(degree) time pipeline deformation schematic diagram.
Fig. 8 is inclined with pipe joint 0 °The F of (spending) is to deformation schematic diagram.
In figure: 1, distribution type fiber-optic, 2, arch measurement apparatus, 2a, arch optical fiber duct, 3, left protection shell, 3a, left side are close
Block plate, 3b, optic fibre hole, 4, right protection shell, 4a, right side sealing baffle, 5, spigot-and-socket pipe insert head, 6, T-shaped caulking gum
Circle, 7, spigot-and-socket pipe socket joint head.
Detailed description of the invention
The technical scheme implemented this utility model below with reference to accompanying drawing carries out detailed, complete description.
Fig. 1,2 structure charts showing Spigot-and-socket pipe joint deformation measuring device.In figure, based on distributive fiber optic strain
The Spigot-and-socket pipe joint deformation measuring device of sensor includes spigot-and-socket pipe insertion 5, T-shaped sealing rubber ring 6, spigot-and-socket pipe
7, three distribution type fiber-optics 1 of socket joint head and three arch measurement apparatus 2, T-shaped sealing rubber ring 6 is placed in spigot-and-socket pipe socket joint head 7
Seal groove in after, insert spigot-and-socket pipe and insert 5.Three arch measurement apparatus 2 are distributed on the week of Spigot-and-socket pipe joint
Enclosing, one end glue of arch measurement apparatus 2 is fixed on the outer wall of spigot-and-socket pipe insertion 5, and other end glue is fixed on socket joint
On the outer wall of formula pipe socket joint head 7, distribution type fiber-optic 1 glue is in turn secured on the outer wall of spigot-and-socket pipe insertion 5, arch is measured
In the arch optical fiber duct 2a of device 2 and on the outer wall of spigot-and-socket pipe socket joint head 7.The outside of arch measurement apparatus 2 is provided with to be fixed on
Spigot-and-socket pipe inserts the left protection shell 3 on 5 outer wall and the right protection shell 4 being fixed on spigot-and-socket pipe socket joint head 7 outer wall,
Left protection shell 3 is closely packed together with right protection shell 4, and on the left of the left end employing of left protection shell 3, sealing baffle 3a closes, right
On the right side of the right-hand member employing of protection shell 4, sealing baffle 4a closes.
Arch measurement apparatus main body uses ultrathin design, and thickness is about 1mm, and width is about 15mm, its major advantage
It is: owing to compact structure will have substantially no effect on the deformation of monitored pipe joint；And from mechanics of materials ultimate principle,
When moderate finite deformation occurs in institute's monitoring of structures, its ultrathin design will make the surface strain maximum of this monitoring device less than distribution
The maximum monitoring range (20000 microstrain) of formula optical fiber；The stickup foot lower surface of arch measurement apparatus uses frosted to process, this
Sample can make this device tightr with the bonding of institute monitoring of structures by binding agent；The upper surface of arch measurement apparatus has two lines
Projection, height is about 2mm, and as shown in Figure 3,4, its effect has 2 points: one, guides distribution type fiber-optic to be attached at arch and measures dress
The tram put, makes optical fiber form a smooth curves；Two, the bonding between distribution type fiber-optic and arch measurement apparatus is prevented
Agent is outflowed, and keeps binding agent concordance of shape when solidification.And in three arcs determine device the radius of each arc, device
Length and during the height geometric parameter such as aspect, should match with the model of flexible water supply line.Such as hold for DN200 type
Inserting the arch measurement apparatus of formula flexible duct interface, its middle arc radius is 150mm, and radian is 96 °；Both sides arc radius is
25mm, radian is 44 °；Device total length 285mm, high 50mm.
Arch measurement apparatus is fixed on interface both sides, and applies epoxide-resin glue that distribution type fiber-optic is attached at arch measurement
Between the two lines projection of the upper surface of device, and distribution type fiber-optic is made to be wrapped in epoxide-resin glue.To accurately understand
Pipe joint bending, stretching and bending direction, its overall distribution method is as in figure 2 it is shown, in 0 °, 120 °, 240 ° of three directions
It is respectively arranged an arch measurement apparatus.
Owing to measuring of arch measurement apparatus needs certain deformation space, therefore when behind this device embedment underground, need one
Plant protection shell and i.e. ensure that arch measurement apparatus has certain activity space, can be sealed against and not have again other foreign material to enter,
Such as earth etc. disturb the deformation of this device.Arch measurement apparatus uses the left protection shell of enough rigidity, right protection shell, left side
Sealing baffle and right side sealing baffle are closed.
Mainly comprising the following steps of the method for reckoning interface deformation: first needing to carry out model test, the pipe joint drawn draws
Stretch distance measurement data, relation between pipe joint angle of bend and measurement data；By the derivation of equation, sum up a whole set of
Overall relation between pipe joint deformation and surveyed data, by the anti-reality releasing interface of data measured under buried pipeline
Border deformation；By setting up danger early warning standard, when pipe joint deforms more than dangerous stretching with the standard value bent, can
Alarm is obtained by the data very first time of Real-time Collection.It follows that above-mentioned steps will be described in detail in:
(1) model test: shown in Fig. 2, at model pipeline seam, i.e. 0 °, 120 °, 240 ° is respectively arranged an arch and surveys
Amount device.When the sample frequency of distribution type fiber-optic is 5cm, as pipe joint deforms, now it is attached at each arch and surveys
Optical fiber on amount device can gather several strain data, and (the arch measurement apparatus for DN200 type socket joint pipeline is 6 to 7 numbers
According to).The maximum absolute value of tip position deformation strain during the deformation of arch measurement apparatus, therefore take in measured data centre position
Data, i.e. the data of arch measurement apparatus top are as characteristic, i.e. characteristic strain.
Shown in Fig. 6, in the axial tension test of model, when pipe joint is stretched X mm vertically, three arch
Measurement apparatus is identical due to lateral displacement, therefore characteristic is identical, and this feature data can be referred to as stretch characteristic strain.By
The mechaanical property of materials understands, and when material is in elastic stage, the tensile elongation of interface should be directly proportional to stretch characteristic strain, therefore can
Obtained the coefficient of relationship a of lateral displacement and characteristic strain by different operating modes, its formula is:
X=a(1)
Shown in Fig. 7, in model cross bending test, when pipeline is along a certain arch measurement apparatus direction bending Y(degree) time,
Now the characteristic strain of direction arch measurement apparatus is maximum, can the characteristic measured by this arch measurement apparatus be referred to as
Macrobending characteristic strain.From the mechaanical property of materials, when material is in elastic stage, the angle of bend of interface is with maximum
Bending features strain is directly proportional, and can obtain interface angle of bend and characteristic strain coefficient of relationship b, its formula by different operating modes
For:
Y=b(2)
(2) data are derived: Fig. 8 is pipe joint cross sectional curve schematic diagram under a certain operating mode, is positioned at three as seen from the figure
Distance radius between cross section and the center of circle of pipeline section of the sensor in direction is equal.Assume that pipe joint is along bending direction
Between (being assumed to be F direction in figure) and 0 ° of arch measurement apparatus direction, angle is θ (spending).When pipe joint produces stretcher strain,
When producing again the flexural deformation along F direction, can obtain measured by three arch measurement apparatus by measuring under this operating mode
Characteristic strain 、With.Based on the mechanics of materials hypothesis of plane mechanism, it is known that the surveyed characteristic strain of arch measurement apparatus should be with stretching spy
Levy strain, maximum deflection characteristic strainAnd along the strain stress relation theoretical formula between bending direction angle theta (spending) it is:
(3)
And bring measured three characteristic strain into 、With:
(4)
(5)
(6)
By deriving, stretch characteristic strain can be solved, maximum deflection characteristic strainWith along bending direction angle theta
(spending) is:
(7)
(8)
(9)
Now try to achieve(spending) is the bending direction of pipe joint, and stretching distance X and angle of bend Y(degree) can lead to
Cross(formula 1) with(formula 2) tries to achieve.
(3) danger early warning: one group of danger can be set draw by the dangerous angle of bend of pipe joint and tensile elongation standard
Stretch and the standard value of bendingWith(spending), by the measured value of arch measurement apparatus derived stretching distance X and angle of bend
Degree Y(degree) contrast with hazard standard value, and then learn pipe joint whether safe operation.
Claims (1)
1. a Spigot-and-socket pipe joint deformation measuring device based on distributive fiber optic strain sensor, it includes spigot-and-socket pipe
Inserting head (5), T-shaped sealing rubber ring (6) and spigot-and-socket pipe socket joint head (7), T-shaped sealing rubber ring (6) is placed in spigot-and-socket Guan Cheng
After in the seal groove of plug (7), insert spigot-and-socket pipe and insert head (5), it is characterised in that: it also includes three distribution type fiber-optics
(1) and three arch measurement apparatus (2), three arch measurement apparatus (2) are distributed on around Spigot-and-socket pipe joint；Described bow
One end glue of shape measurement apparatus (2) is fixed on spigot-and-socket pipe and inserts on the outer wall of head (5), and other end glue is fixed on spigot-and-socket
On the outer wall of pipe socket joint head (7), described distribution type fiber-optic (1) with glue be in turn secured to spigot-and-socket pipe insert head (5) outer wall on,
In the arch optical fiber duct (2a) of arch measurement apparatus (2) and on the outer wall of spigot-and-socket pipe socket joint head (7)；Described arch measurement apparatus
(2) outside is provided with the left protection shell (3) being fixed on spigot-and-socket pipe insertion head (5) outer wall and is fixed on spigot-and-socket pipe socket joint
Right protection shell (4) on head (7) outer wall, described left protection shell (3) is closely packed together with right protection shell (4), left protection
On the left of the left end employing of shell (3), sealing baffle (3a) is closed, sealing baffle (4a) on the right side of the right-hand member employing of right protection shell (4)
Close.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620725248.9U CN205808361U (en) | 2016-07-11 | 2016-07-11 | Spigot-and-socket pipe joint deformation measuring device based on distributive fiber optic strain sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620725248.9U CN205808361U (en) | 2016-07-11 | 2016-07-11 | Spigot-and-socket pipe joint deformation measuring device based on distributive fiber optic strain sensor |
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| CN205808361U true CN205808361U (en) | 2016-12-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973162A (en) * | 2016-07-11 | 2016-09-28 | 大连理工大学 | Spigot-and-socket pipeline interface deformation measurement apparatus and measurement method based on distributed fiber strain sensor |
| CN114459415A (en) * | 2021-12-29 | 2022-05-10 | 南京航空航天大学 | Device and method for measuring rotation angle of spherical joint |
-
2016
- 2016-07-11 CN CN201620725248.9U patent/CN205808361U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105973162A (en) * | 2016-07-11 | 2016-09-28 | 大连理工大学 | Spigot-and-socket pipeline interface deformation measurement apparatus and measurement method based on distributed fiber strain sensor |
| CN114459415A (en) * | 2021-12-29 | 2022-05-10 | 南京航空航天大学 | Device and method for measuring rotation angle of spherical joint |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161214 Termination date: 20180711 |
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| CF01 | Termination of patent right due to non-payment of annual fee |