CN208111159U - A kind of built-in fiber formula cable - Google Patents
A kind of built-in fiber formula cable Download PDFInfo
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- CN208111159U CN208111159U CN201820562245.7U CN201820562245U CN208111159U CN 208111159 U CN208111159 U CN 208111159U CN 201820562245 U CN201820562245 U CN 201820562245U CN 208111159 U CN208111159 U CN 208111159U
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- optical fiber
- cable
- built
- fiber
- temperature resistant
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- 239000000835 fiber Substances 0.000 title claims abstract description 23
- 239000013307 optical fiber Substances 0.000 claims abstract description 54
- 238000005728 strengthening Methods 0.000 claims abstract description 18
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 14
- 239000010935 stainless steel Substances 0.000 claims abstract description 14
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 12
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 6
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 6
- 229920000271 Kevlar® Polymers 0.000 claims abstract description 4
- 239000004760 aramid Substances 0.000 claims abstract description 4
- 229920003235 aromatic polyamide Polymers 0.000 claims abstract description 4
- 239000004761 kevlar Substances 0.000 claims abstract description 4
- 239000011241 protective layer Substances 0.000 claims description 14
- 239000010410 layer Substances 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 28
- 230000003287 optical effect Effects 0.000 description 11
- 238000001514 detection method Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
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- 238000012360 testing method Methods 0.000 description 5
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- 238000001069 Raman spectroscopy Methods 0.000 description 3
- 238000001237 Raman spectrum Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
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- 238000003486 chemical etching Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
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- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses a kind of built-in fiber formula cables, including cable；Sensing optic cable is embedded in the cable；The sensing optic cable includes strengthening core, the high-temperature resistant optical fiber being embedded in strengthening core, the stainless steel screwed tube being wrapped on strengthening core, the secondary enhancement layer being wrapped in outside stainless steel screwed tube, the stainless steel mesh grid being wrapped in outside secondary enhancement layer and the oversheath being located at outside stainless steel mesh grid.The high-temperature resistant optical fiber is divided into temperature-measuring optical fiber and vibration optical fiber.The material of the strengthening core and secondary enhancement layer is Kevlar aramid yarn.The material of the oversheath is polytetrafluoroethylene (PTFE).The high-temperature resistant optical fiber is GI type high temperature resistant type glass optical fiber.
Description
Technical field
The utility model relates to cable thermometric, survey vibration field, and in particular to a kind of built-in fiber formula cable.
Background technique
Power cable is the important carrier of power transmission, is mainly used for controlling installation, connection equipment, transmitting electric power etc. multiple
Effect.Since cable charges, it is therefore desirable to key monitoring.Cable is in use, it may appear that such as overcurrent, overheat, aging,
Phenomena such as short-circuit, is easy to happen fire incident.
A large amount of power cable is distributed in cable duct, in cable testing bridge, cable interlayer, be respectively connected and each is electrically set
It is standby, it is very harmful after generation accident.Since cable often concentrates laying, cable overheat once coverage on fire is wide, reparation when
Between it is long, caused by loss it is big.
Fire incident be largely due to temperature it is excessively high caused by, fire generation before in time, accurately monitoring
The variation of cable temperature simultaneously issues early warning, and user is made to have the sufficient time to take appropriate measures, and avoids that accident occurs or causes
Fire is with regard to particularly important.
Surface contact and contactless detection are currently used substantially for cable temperature monitoring, there is infrared radiation thermometer, heat
The modes such as galvanic couple, temperature-sensitive cable, these modes are all the surface temperatures of detection cable, and precision is lower.Especially protected by cable
The influence of many factors such as sheath, ambient temperature, illumination, testing result accuracy is poor, to judging that cable temperature causes greatly
Interference.Especially cable internal and external temperature is different, and when detecting cable hull-skin temperature exception, cable internal temperature is very
Height, or even burning is had begun, there are certain hysteresis qualitys.
Human factor（Such as：Construction digs broken skin, is cut skin etc.）And natural calamity（Such as：Landslide, landslide, settlement of foundation, corruption
Erosion, mouse destruction etc.）It will cause cable line fault, influence the performance of electric power network construction efficiency.Therefore, applied science means
Realization is detected and is positioned to the failure of the cable of power cable, reminds line attendant to take preventive measures in advance in time
Seem very urgent and necessary.
With the development of detection means, observing and controlling continuous over long distances is may be implemented in optical fiber, can accurately measure the temperature on any point
The information such as degree, vibration, and the monitoring region having in very wide range is consequently formed, the detection level to cable is improved, due to it
Itself have pure optical detection, without power supply, Sefe antiexplosion, detection range be remote, system constitute simply, the advantages such as construction volume is small
Obtain the favor of more and more users.
Utility model content
The utility model is intended to provide that a kind of monitoring is accurate, built-in fiber formula cable of high reliablity.
The utility model adopts the following technical solution：
A kind of built-in fiber formula cable, including cable；Sensing optic cable is embedded in the cable；
The sensing optic cable includes strengthening core, the high-temperature resistant optical fiber being embedded in strengthening core and the guarantor being wrapped on strengthening core
Sheath.
As further solution：The high-temperature resistant optical fiber includes temperature-measuring optical fiber and vibration optical fiber.
As further solution：The protective layer is made of stainless steel screwed tube.
As further solution：Secondary enhancement layer is enclosed on the protective layer.
As further solution：Stainless steel mesh grid is enclosed on the secondary enhancement layer.
As further solution：Oversheath is enclosed in the stainless steel mesh grid.
As further solution：The material of the strengthening core and secondary enhancement layer is Kevlar aramid yarn.
As further solution：The material of the oversheath is polytetrafluoroethylene (PTFE).
As further solution：The high-temperature resistant optical fiber is GI type high temperature resistant type glass optical fiber.
The good effect that the utility model generates is as follows：
The monitoring of the utility model is more accurate.Sensing optic cable is built in power cable, in use, sense light
Cable directly to inside power cable temperature and strum be monitored, and by data Real-time Feedback to monitoring system, isolation
The interference of the factors such as power cable protective layer, illumination, temperature, humidity.
The utility model can be realized distributed measurement.Sensing optic cable is built in power cable, can be according to setting
It measures spacing and realizes detection, can continuously obtain the metrical information along tens kilometers of detection optical fiber, wrong report and rate of failing to report are significantly
It reduces.
The utility model electromagnetism interference can normally work in high electromagnetic environment.The utility model uses optical fiber
It is monitored, optical fiber itself is made of quartz material, complete to be electrically insulated；The signal of fibre optical sensor is with optical fiber simultaneously
For carrier, intrinsic safety, not by the interference of any external electromagnetic environment.Electromagnetism interference, can be normal in high electromagnetic environment
Work.
The utility model use multiple protective mode, antidetonation is explosion-proof, will not cause under strong vibration environment its by
It the mechanical damages such as wounds, wear, in addition will not influence the accuracy of optical cable self character and monitoring.
The high sensitivity of the utility model, measurement accuracy are high.The sensitivity of most of fibre optical sensors and measurement accuracy are all
Better than general sensor, therefore the harsh environments diffused in dust still can be measured accurately.
The utility model far measuring distance is suitable for long-range monitoring.Two outstanding advantages of optical fiber are exactly that transmitted data amount is big
It is small with being lost, without relaying, tens kilometers of long-range monitoring may be implemented.
The utility model service life is long, at low cost.The material of optical fiber is generally all quartz glass, have not burn into fire resisting,
The characteristic of length of water-fast and service life, the operation costs of entire engineering can be substantially reduced using fibre optical sensor.
The utility model construction is simple, it is convenient to be laid with, and the construction cost and monitoring that can save writing build expense.Tradition
Cable construction in, need to build monitoring system while being laid with cable, the construction period is long, and engineering cost is high.And this is practical
It is novel that monitoring system has been directly built in cable, building for monitoring system is completed while being laid with cable, in cable two
End can receive monitoring signals behind installation test side.The duration constantly is shortened, reduces project amount, additionally it is possible to save monitoring
The maintenance cost of system.
Detailed description of the invention
Fig. 1 is the sectional view of the first structure of the utility model；
Fig. 2 is the sectional view of second of structure of the utility model；
Fig. 3 is the sectional view of the third structure of the utility model；
Fig. 4 is the sectional view of the 4th kind of structure of the utility model；
Fig. 5 is the sectional view of the 5th kind of structure of the utility model；
Wherein：1 cable, 21 strengthening cores, 221 temperature-measuring optical fibers, 222 vibration optical fibers, 23 protective layers, 24 2 enhancement layers, 25
Stainless steel mesh grid, 26 oversheaths.
Specific embodiment
The utility model is further described below with reference to Fig. 1-5.
The utility model adopts the following technical solution：
A kind of built-in fiber formula cable, including cable 1；Sensing optic cable is embedded in the cable 1；
The sensing optic cable includes strengthening core 21, the high-temperature resistant optical fiber being embedded in strengthening core 21 and is wrapped in strengthening core 21
On protective layer 23.
As further solution：The high-temperature resistant optical fiber includes temperature-measuring optical fiber 221 and vibration optical fiber 222.
As further solution：The protective layer 23 is made of stainless steel screwed tube.
As further solution：Secondary enhancement layer 24 is enclosed on the protective layer 23.
As further solution：Stainless steel mesh grid 25 is enclosed on the secondary enhancement layer 24.
As further solution：Oversheath 26 is enclosed in the stainless steel mesh grid 25.
As further solution：The material of the strengthening core 21 and secondary enhancement layer 24 is Kevlar aramid yarn.
As further solution：The material of the oversheath 26 is polytetrafluoroethylene (PTFE).
As further solution：The high-temperature resistant optical fiber is GI type high temperature resistant type glass optical fiber.
Optical fiber is the glass solid fibrous pulled into using SiO2 as host material, and guide-lighting principle is former using the total reflection of light
Reason will that is, when light is incident on the small optically thinner medium of refractive index by the big optically denser medium of refractive index to be greater than the angle of critical angle
It is totally reflected, incident light is all reflected into the big optically denser medium of refractive index, will be saturating without light in the small optically thinner medium of refractive index
It crosses.Common bare fibre is generally set by center glass of high refractive index core, intermediate low-refraction silica glass covering and outermost reinforcement
Rouge coating composition.By index distribution the case whereization point, step-refraction index can be divided into（SI）Optical fiber and graded index（GI）Light
It is fine.The high-temperature resistant optical fiber of the utility model uses GI type optical fiber, that is, graded index fiber optic, refractive index and extraneous factor
Linear corresponding relationship, therefore monitoring information can be determined according to corresponding relationship.
In structure, high-temperature resistant optical fiber is placed in protective layer 23 by the utility model, caused by avoiding vibration, bending etc.
Damage, while increasing strengthening core 21 in protective layer 23, it can be avoided the shaking of high-temperature resistant optical fiber and avoid itself and protective layer 23
Damage caused by contact.Secondary enhancement layer 24, stainless steel mesh grid 25 and oversheath 26 have been sequentially increased outside protective layer 23,
Purpose is to further strengthen, and avoids damaging.Because sensing optic cable is built in cable 1, it can not replace, it is therefore desirable to especially protect
Shield.
Spiral steel pipe is usually used as protective case in traditional sensing optic cable housing, and heat dissipation is slow, be easy to cause accumulated heat and
Cable bad.The oversheath 26 of the utility model is made of polytetrafluoroethylene (PTFE), and conventional helical steel tube armour type can be overcome to pass
The shortcomings that sensing optical cable high/low temperature narrow scope, makes its long-term use temperature expand to -45 DEG C~150 DEG C, and maximum temperature can reach
To 200 DEG C, the scope of application is greatly extended.In addition, polytetrafluoroethylene (PTFE) it is unique it is thermally conductive it is fast, insulation resistance is high, it is wear-resisting,
Resistant to chemical etching, not hydrophilic, not oleophylic, the features such as density is high, extend the suitable application area of optical cable greatly.
The testing principle of the utility model is further detailed below.
In the scattering phenomenon of light（Such as Rayleigh scattering, Brillouin scattering and Raman scattering）In there are a special effects and X to penetrate
The Compton effect of line scattering is similar, i.e., the frequency of light can change after scattering.Wherein " Raman scattering " refers to certain frequency
When the laser irradiation of rate is to sample surfaces, the vibration of different modes and degree occurs for molecule absorption in substance portion of energy
（Such as：The swing and twisting of atom, the swing and vibration of chemical bond）, then scatter the light of lower frequency.The variation of frequency
It is decided by the characteristic of scatterer, the mode of different atomic group vibrations is only, therefore can produce the scattering of specific frequency
Light, spectrum are known as " Fingerprint ", can like this principle identify component molecule type.
The utility model carries out temperature monitoring according to backward Raman scattering effect.Raman spectrum is incident photon and divides
When son collides, the superposition of the vibrational energy or rotational energy and photon energy of molecule as a result, can be place using Raman spectrum
Visible region is transferred in the molecular spectrum of infrared region to observe.Laser pulse and optical fiber interaction of molecules, scatter.It draws
Graceful scattering is the thermal vibration due to optical fiber molecule, it can generate a light longer than optical source wavelength, claim stokes light and one
The light shorter than optical source wavelength, referred to as anti-Stokes light.Optical fiber is modulated the anti-Stokes light made in optical fiber by external temperature
It changes by force, the ratio of stokes light and anti-Stokes light provides the absolute instruction of temperature, can using this principle
To realize to the distributed measurement along fiber optic temperature field.
Distributed optical fiber vibration sensing technology is to utilize OTDR（optical time domain reflectometer）Light
The interference mechanism of domain reflectometer tests external disturbance, the pressure that external disturbance is acted on above optical cable or nearby generated（Vibration）
Rayleigh scattering light phase in optical fiber is caused to change, due to interference effect, when light phase variation is by the variation for causing luminous intensity,
By the position that can position vibration signal after real-time monitoring different moments to the interference effect of Rayleigh scattering signal.
Temperature-measuring optical fiber 221 and vibration optical fiber 222 work at the same time, and do not interfere with each other, can be respectively to the temperature of cable and vibration
Real-time monitoring is carried out, guarantees its normal work.
It is important to note that the quantity of high-temperature resistant optical fiber can may be in sensing optic cable for one in the application
It is a plurality of.When the quantity of high-temperature resistant optical fiber is one, the high-temperature resistant optical fiber is as temperature monitoring carrier or vibration monitoring carrier；
When the quantity of high-temperature resistant optical fiber is a plurality of, wherein a high-temperature resistant optical fiber is carried as temperature monitoring carrier or vibration monitoring
Body, remaining high-temperature resistant optical fiber is as acknowledgment copy, the case where being unable to monitor after avoiding single fiber from damaging；Simultaneously, it may be considered that one
High-temperature resistant optical fiber can be used as temperature monitoring carrier, and another can be used as vibration monitoring carrier, remaining is as acknowledgment copy.
In addition, can bury a plurality of sensing optic cable in cable, a part of sensing optic cable makees temperature monitoring, and another part, which is done, to be shaken
Dynamic monitoring.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations,
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that,
It can still modify to technical solution documented by previous embodiment, or be equal to part of technical characteristic
Replacement, and these are modified or replaceed, the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (9)
1. a kind of built-in fiber formula cable, including cable（1）；It is characterized in that：The cable（1）Inside it is embedded with sensing optic cable；
The sensing optic cable includes strengthening core（21）, be embedded in strengthening core（21）Interior high-temperature resistant optical fiber and it is wrapped in strengthening core
（21）On protective layer（23）.
2. a kind of built-in fiber formula cable according to claim 1, it is characterised in that：The high-temperature resistant optical fiber includes thermometric
Optical fiber（221）And vibration optical fiber（222）.
3. a kind of built-in fiber formula cable according to claim 1, it is characterised in that：The protective layer（23）Using stainless
The production of steel screwed pipe.
4. a kind of built-in fiber formula cable according to claim 1, it is characterised in that：The protective layer（23）On be enclosed with
Secondary enhancement layer（24）.
5. a kind of built-in fiber formula cable according to claim 4, it is characterised in that：The secondary enhancement layer（24）Upper packet
It is wrapped with stainless steel mesh grid（25）.
6. a kind of built-in fiber formula cable according to claim 5, it is characterised in that：The stainless steel mesh grid（25）On
It is enclosed with oversheath（26）.
7. a kind of built-in fiber formula cable according to claim 4, it is characterised in that：The strengthening core（21）Add with secondary
Strong layer（24）Material be Kevlar aramid yarn.
8. a kind of built-in fiber formula cable according to claim 6, it is characterised in that：The oversheath（26）Material be
Polytetrafluoroethylene (PTFE).
9. a kind of built-in fiber formula cable according to claim 1, it is characterised in that：The high-temperature resistant optical fiber（22）For GI
Type high temperature resistant type glass optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820562245.7U CN208111159U (en) | 2018-04-19 | 2018-04-19 | A kind of built-in fiber formula cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820562245.7U CN208111159U (en) | 2018-04-19 | 2018-04-19 | A kind of built-in fiber formula cable |
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| Publication Number | Publication Date |
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| CN208111159U true CN208111159U (en) | 2018-11-16 |
Family
ID=64119188
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| CN201820562245.7U Expired - Fee Related CN208111159U (en) | 2018-04-19 | 2018-04-19 | A kind of built-in fiber formula cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082871A (en) * | 2019-04-11 | 2019-08-02 | 江苏通光海洋光电科技有限公司 | A kind of highly sensitive sensor fibre unit and its manufacturing method |
-
2018
- 2018-04-19 CN CN201820562245.7U patent/CN208111159U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082871A (en) * | 2019-04-11 | 2019-08-02 | 江苏通光海洋光电科技有限公司 | A kind of highly sensitive sensor fibre unit and its manufacturing method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181116 |
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| CF01 | Termination of patent right due to non-payment of annual fee |