CN110685221A - Intelligent inhaul cable containing rubber-coated optical fibers and manufacturing method thereof - Google Patents
Intelligent inhaul cable containing rubber-coated optical fibers and manufacturing method thereof Download PDFInfo
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- CN110685221A CN110685221A CN201910934492.4A CN201910934492A CN110685221A CN 110685221 A CN110685221 A CN 110685221A CN 201910934492 A CN201910934492 A CN 201910934492A CN 110685221 A CN110685221 A CN 110685221A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
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- Structural Engineering (AREA)
- Ropes Or Cables (AREA)
Abstract
The invention relates to an intelligent inhaul cable containing rubber-coated optical fibers and a manufacturing method thereof. Compared with the prior art, the intelligent inhaul cable solves the problem of insufficient optical fiber strength when the optical fiber and the steel wire are twisted together by utilizing the shearing strength of the rubber, can measure the stress of the steel wire in real time, and effectively reduces the vibration of the inhaul cable by utilizing the characteristic of higher damping of the rubber.
Description
Technical Field
The invention belongs to the technical field of cable-stayed bridges, and relates to an intelligent cable containing rubber-coated optical fibers and a manufacturing method thereof.
Background
The stay cable is a life line of the cable-stayed bridge, is responsible for bearing static load and dynamic load acting on a bridge structure, and generally needs to have the service life of more than 30 years. Because the stay cable is arranged outside the beam body and is greatly influenced by external factors, the steel wire is easy to generate the problems of corrosion degradation and vibration fatigue degradation in the service process, and the durability of the bridge is seriously influenced. Therefore, how to realize the real-time monitoring of the long-term working state of the cable and ensure the safety in the service life is the key of the development of the modern bridge cable technology.
The existing cable force measuring methods are mainly divided into two methods of an external detection part and an internal implantation detection part. The method of embedding the detection component inside enables the sensor and the cable to be fused into a whole, and enables the cable to have the capability of self-sensing the cable force, so the method is also called as an intelligent cable technology. While there are significant advances and advantages of the composite tendon (strain sensor) approach, which is typical of smart cable technology, there are still improvements: 1. in the cable twisting process, the composite rib needs to be twisted together with the single steel wire, so that the composite rib bears a very large shearing force effect and is easy to damage a sensing element in the composite rib; 2. the actual normal working strain of the body part of the cable is about 4000 mu epsilon, while the stable strain working range of the existing optical fiber strain sensing element is only less than 3500 mu epsilon, and when the bridge and the cable structure are slightly damaged or the steel wires in the cable are broken, the strain range of the cable can greatly exceed the strain working range of the existing strain sensing technology.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an intelligent inhaul cable containing an outer rubber-coated optical fiber and a manufacturing method thereof. The rubber outer layer wrapped outside the optical fiber counteracts the working strain of a part of the stay cable through self shear deformation, and the optical fiber monitors the deformation of the cable under the normal working condition. Meanwhile, the rubber outer layer isolates the steel wire from the optical fiber, and normal work of the optical fiber is prevented from being influenced by large humidity in the steel wire. In addition, the rubber outer layer has the effect of increasing inhaul cable damping, and when the cable vibrates, the damping force of the inhaul cable is increased through self compression deformation of the rubber material, so that the amplitude is effectively reduced.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides an intelligent cable that contains outsourcing rubber fiber, this intelligent cable include many steel wires and an at least intelligence silk, steel wire and intelligence silk hank system together, the intelligence silk include optic fibre and cover and establish at the outside rubber skin of optic fibre, the rubber skin separate optic fibre and steel wire mutually.
Furthermore, a pore is formed in the rubber outer layer, and the optical fiber is located in the pore. The inner layer of the rubber is provided with a hole for accommodating the optical fiber. The reflection wavelength of the fiber grating is 1550-.
Furthermore, the inner diameter of the pore canal is 1-3 mm.
Furthermore, an epoxy resin layer is filled between the optical fiber and the rubber outer layer. The epoxy resin layer is used for cementing and fixing the optical fiber.
Further, the outer surface of the rubber outer layer is coated with a high-temperature-resistant coating.
Further, this intelligent cable still includes and winds the high strength polyester fiber area of establishing in the steel wire and intelligent silk outside simultaneously.
Furthermore, a high-density polyethylene sheath is sleeved outside the high-strength polyester fiber belt. The steel wire and the intelligent wire are twisted and then wrapped with a high-strength polyester fiber tape, and then high-density Polyethylene (PE) is extruded again to form a high-density polyethylene sheath.
Furthermore, both ends of the intelligent inhaul cable are provided with anchors. The anchorage device is connected with the intelligent inhaul cable through epoxy resin pouring and cold casting anchoring.
Furthermore, the two ends of the intelligent inhaul cable are provided with optical time domain reflectors electrically connected with the optical fibers. The optical time domain reflectometer is electrically connected with the optical fiber through a conducting wire.
A manufacturing method of an intelligent inhaul cable containing an outer rubber-coated optical fiber comprises the following steps:
1) selecting a rubber outer layer with a required length, penetrating an optical fiber into a pore channel of the rubber outer layer, and reserving outgoing lines at two ends of the optical fiber;
2) injecting epoxy resin into the pore channel to form an epoxy resin layer, and cementing the optical fiber in the rubber outer layer to obtain the intelligent wire;
3) stranding the steel wire and the intelligent wire together and penetrating the steel wire and the intelligent wire through the anchorage device;
4) pouring epoxy resin into the anchorage device;
5) the outgoing line of the optical fiber is connected to an optical time domain reflectometer.
The invention provides an intelligent inhaul cable which can monitor the cable force in real time and has a damping effect, the intelligent inhaul cable solves the problem of insufficient optical fiber strength when an optical fiber and a steel wire are twisted together by utilizing the shearing strength of an outer rubber layer, the stress of the steel wire can be measured in real time, and the vibration of the inhaul cable is effectively reduced by utilizing the characteristic of higher rubber damping.
Compared with the prior art, the invention has the following characteristics:
1) the rubber outer layer offsets a part of axial deformation of the inhaul cable through self shearing deformation, so that the optical fiber can normally monitor the deformation of the inhaul cable under a certain strain conversion condition, and meanwhile, the sensitivity and the accuracy of the fiber grating sensor are greatly improved due to the bonding of the optical fiber and the rubber outer layer;
2) when the cable vibrates, the rubber material increases the damping force of the inhaul cable through the compression deformation of the rubber material, and the amplitude is effectively reduced;
3) the rubber outer layer isolates the steel wire from the optical fiber, and the influence of high humidity in the steel wire on the normal work of the optical fiber and the like is prevented;
4) the intelligent inhaul cable has the advantages of long-distance monitoring, low energy dependence, high environmental tolerance, electromagnetic interference resistance, corrosion resistance and the like.
Drawings
FIG. 1 is a schematic cross-sectional structure view of an intelligent cable according to the present invention;
FIG. 2 is a schematic cross-sectional view of a smart wire according to the present invention;
FIG. 3 is a schematic view of an assembly structure of an intelligent cable and an anchorage device according to the present invention;
the notation in the figure is:
the cable comprises 1-rubber outer layer, 2-optical fiber, 3-pore channel, 4-epoxy resin layer, 5-steel wire, 6-intelligent wire, 7-outgoing line, 8-anchorage device, 9-optical time domain reflectometer and 10-intelligent inhaul cable.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1:
as shown in fig. 2, the intelligent cable 10 containing the rubber-coated optical fiber is composed of a plurality of common steel wires 5 and at least one intelligent wire 6. The intelligent filament 6 is composed of a rubber outer layer 1, an optical fiber 2, a pore 3 and an epoxy resin layer 4, wherein the optical fiber 2 is arranged in the rubber outer layer 1 with the pore 3 reserved, and then is fixed by gluing the epoxy resin layer 4.
The manufacturing method of the intelligent inhaul cable 10 comprises the following steps:
1) prefabricating a high-temperature-resistant molded rubber outer layer 1 according to the length requirement of the intelligent inhaul cable 10;
2) the optical fiber 2 is penetrated into the pore channel 3 of the rubber outer layer 1, and a tail section outgoing line 7 with enough length is reserved;
3) epoxy resin is poured into the pore 3, and the optical fiber 2 is glued in the rubber outer layer 1;
4) twisting the common steel wire 5 and the intelligent wire 6 together, and penetrating through an anchorage device 8;
5) performing anchor filling by using a cold casting method, filling epoxy resin and performing reverse jacking;
6) connecting the outgoing line 7 of the optical fiber 2 to an optical time domain reflectometer 9;
working process of the optical fiber 2: light emitted by the light source is modulated by the phase modulator and then enters the optical fiber 2 grating, when the stress and the temperature of the steel wire 5 change, the optical time domain reflectometer 9 detects that the wavelength of the optical fiber 2 grating changes, and then the stress and the temperature change of the steel wire 5 can be determined.
In this embodiment, the grating reflection wavelength of the optical fiber 2 is 1550nm, the reflectivity is 30%, and the diameter of the reserved hole 3 of the rubber outer layer 1 is 1 mm.
Example 2:
in this embodiment, the reflection wavelength of the fiber 2 grating is 1500nm, the reflectivity is 60%, the diameter of the reserved hole 3 of the rubber outer layer 1 is 2mm, and the rest is the same as that of embodiment 1.
Example 3:
in this embodiment, the reflection wavelength of the optical fiber 2 grating is 1600nm, the reflectivity is 90%, the diameter of the reserved hole 3 of the rubber outer layer 1 is 3mm, and the rest is the same as that of embodiment 1.
Example 4:
as shown in figure 1, the intelligent inhaul cable with the rubber-coated optical fiber comprises a plurality of steel wires 5 and at least one intelligent wire 6, wherein the steel wires 5 and the intelligent wire 6 are twisted together.
As shown in fig. 2, the smart wire 6 includes an optical fiber 2 and a rubber outer layer 1 covering the optical fiber 2, wherein the rubber outer layer 1 separates the optical fiber 2 from the steel wire 5. The inner part of the rubber outer layer 1 is provided with a pore channel 3, and the optical fiber 2 is positioned in the pore channel 3. The inner diameter of the pore canal 3 is 1-3 mm. An epoxy resin layer 4 is filled between the optical fiber 2 and the rubber outer layer 1.
The outer surface of the rubber outer layer 1 is coated with a high temperature resistant coating. The intelligent inhaul cable 10 further comprises a high-strength polyester fiber belt which is wound outside the steel wire 5 and the intelligent wire 6. The high-density polyethylene sheath is sleeved outside the high-strength polyester fiber belt.
As shown in fig. 3, anchors 8 are provided at both ends of the intelligent cable 10. And optical time domain reflectors 9 electrically connected with the optical fibers 2 are arranged at two ends of the intelligent inhaul cable 10.
The manufacturing method of the intelligent inhaul cable 10 comprises the following steps:
1) selecting a rubber outer layer 1 with a required length, penetrating an optical fiber 2 into a pore 3 of the rubber outer layer 1, and reserving outgoing lines 7 at two ends of the optical fiber 2;
2) injecting epoxy resin into the pore 3 to form an epoxy resin layer 4, and cementing the optical fiber 2 in the rubber outer layer 1 to obtain an intelligent wire 6;
3) twisting the steel wire 5 and the intelligent wire 6 together to obtain an intelligent inhaul cable 10, and respectively penetrating two ends of the intelligent inhaul cable 10 through an anchorage device 8;
4) pouring epoxy resin into the anchorage device 8;
5) the pigtail 7 of the optical fiber 2 is connected to an optical time domain reflectometer 9.
The rubber outer layer 1 wrapped outside the optical fiber 2 offsets the working strain of a part of stay cable through self shear deformation, and the optical fiber 2 monitors the deformation of the cable under the normal working condition. Meanwhile, the rubber outer layer 1 also isolates the steel wire 5 from the optical fiber 2, and the influence of high humidity in the steel wire 5 on the normal work of the optical fiber 2 is prevented. In addition, the rubber outer layer 1 has the effect of increasing the damping of the inhaul cable, and when the cable vibrates, the damping force of the inhaul cable is increased through the compression deformation of the rubber material, so that the amplitude is effectively reduced.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The utility model provides an intelligent cable that contains outsourcing rubber fiber, its characterized in that, this intelligent cable (10) include many steel wires (5) and at least one intelligent silk (6), steel wire (5) with intelligent silk (6) hank system together, intelligent silk (6) include optic fibre (2) and establish the rubber skin (1) in optic fibre (2) outside, rubber skin (1) separate optic fibre (2) and steel wire (5) mutually.
2. An intelligent inhaul cable containing rubber-coated optical fibers as claimed in claim 1, wherein the rubber outer layer (1) is internally provided with a hole (3), and the optical fibers (2) are positioned in the hole (3).
3. An intelligent inhaul cable containing rubber-coated optical fibers as claimed in claim 2, wherein the inner diameter of the hole (3) is 1-3 mm.
4. An intelligent cable containing rubber-coated optical fiber as claimed in claim 2, wherein the epoxy layer (4) is filled between the optical fiber (2) and the rubber outer layer (1).
5. An intelligent inhaul cable containing rubber-coated optical fibers as claimed in claim 1, wherein the outer surface of the rubber outer layer (1) is coated with a high temperature resistant coating.
6. An intelligent pulling cable containing rubber-coated optical fiber as defined in claim 1, wherein the intelligent pulling cable (10) further comprises a high-strength polyester fiber tape wound around both the steel wire (5) and the intelligent wire (6).
7. An intelligent pulling cable containing rubber-coated optical fiber as recited in claim 6, wherein the high-strength polyester fiber band is externally sheathed with a high-density polyethylene sheath.
8. An intelligent inhaul cable containing rubber-coated optical fibers as claimed in claim 1, wherein anchors (8) are arranged at both ends of the intelligent inhaul cable (10).
9. An intelligent pulling cable containing rubber-coated optical fiber as defined in claim 1, wherein both ends of said intelligent pulling cable (10) are provided with optical time domain reflectometer (9) electrically connected with optical fiber (2).
10. A method for manufacturing an intelligent cable comprising rubber-coated optical fibers as recited in any one of claims 1 to 9, comprising the steps of:
1) selecting a rubber outer layer (1) with a required length, penetrating an optical fiber (2) into a pore channel (3) of the rubber outer layer (1), and reserving outgoing lines (7) at two ends of the optical fiber (2);
2) epoxy resin is poured into the pore channel (3) to form an epoxy resin layer (4), and the optical fiber (2) is glued in the rubber outer layer (1) to obtain the intelligent wire (6);
3) twisting the steel wire (5) and the intelligent wire (6) together to obtain an intelligent inhaul cable (10), and respectively penetrating two ends of the intelligent inhaul cable (10) through an anchorage device (8);
4) pouring epoxy resin into the anchorage device (8);
5) the outgoing line (7) of the optical fiber (2) is connected to an optical time domain reflectometer (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910934492.4A CN110685221A (en) | 2019-09-29 | 2019-09-29 | Intelligent inhaul cable containing rubber-coated optical fibers and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910934492.4A CN110685221A (en) | 2019-09-29 | 2019-09-29 | Intelligent inhaul cable containing rubber-coated optical fibers and manufacturing method thereof |
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| CN110685221A true CN110685221A (en) | 2020-01-14 |
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| CN201910934492.4A Pending CN110685221A (en) | 2019-09-29 | 2019-09-29 | Intelligent inhaul cable containing rubber-coated optical fibers and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513122A (en) * | 2021-03-22 | 2021-10-19 | 广东坚宜佳五金制品有限公司 | Hot-cast anchor of intelligent steel strand inhaul cable and manufacturing method |
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| CN109267484A (en) * | 2018-08-28 | 2019-01-25 | 法尔胜泓昇集团有限公司 | Intelligent cable containing carbon fiber composite material ribs and cable manufacturing method |
| CN209010975U (en) * | 2018-08-28 | 2019-06-21 | 法尔胜泓昇集团有限公司 | Intelligent cable containing carbon fiber composite material rib |
| CN109958056A (en) * | 2019-04-15 | 2019-07-02 | 武汉地震工程研究院有限公司 | Smart stay cable, smart stay cable preparation method and smart stay cable safe condition detection method |
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2019
- 2019-09-29 CN CN201910934492.4A patent/CN110685221A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3295599B2 (en) * | 1996-06-28 | 2002-06-24 | 東京製綱株式会社 | Rope with electric cable |
| CN104018374A (en) * | 2014-06-10 | 2014-09-03 | 无锡通用钢绳有限公司 | High-tenacity optical fiber steel wire rope |
| CN107076585A (en) * | 2015-08-27 | 2017-08-18 | 新日铁住金工程技术株式会社 | Cable and the introduction method that incipient extension strain is imported to optical fiber |
| CN106199886A (en) * | 2016-09-28 | 2016-12-07 | 广西大学 | A kind of intelligent steel strand containing fiber-optic grating sensor |
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| CN113513122A (en) * | 2021-03-22 | 2021-10-19 | 广东坚宜佳五金制品有限公司 | Hot-cast anchor of intelligent steel strand inhaul cable and manufacturing method |
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Application publication date: 20200114 |
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