CN215340452U

CN215340452U - Filled epoxy coating prestress intelligent optical cable

Info

Publication number: CN215340452U
Application number: CN202120118855.XU
Authority: CN
Inventors: 赵鹏; 胡尧庆; 邹明
Original assignee: Jiangxi Qiyuan New Material Co ltd
Current assignee: Jiangxi Qiyuan New Material Co ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-12-28
Anticipated expiration: 2031-01-18

Abstract

The utility model discloses a filling type epoxy coating prestress intelligent optical cable which comprises an intelligent center wire, wherein a distributed optical fiber with a sensing function is embedded in the intelligent center wire, the length of the optical fiber is the same as that of the intelligent center wire, a plurality of edge wires are wrapped on the outer side wall of the intelligent center wire, a first epoxy coating is arranged on the outer side wall of each edge wire, a gap is reserved between the inner side wall of each edge wire and the outer side wall of the intelligent center wire, and a second epoxy coating is filled in the gap. The utility model can be used as a communication optical cable, has self bearing capacity after being tensioned and reliably anchored, and can realize long-distance spaced arrangement. If the fiber is buried underground, the fiber also protects the optical fiber, has the characteristics of certain bending resistance, high corrosion resistance and the like, and is convenient to arrange.

Description

Filled epoxy coating prestress intelligent optical cable

Technical Field

The utility model relates to the technical field of optical cables, in particular to a filled epoxy coating prestress intelligent optical cable.

Background

The current optical cable is basically a communication optical cable and is used in the technical field of communication. The communication optical cable is only used for transmitting communication signals, and is influenced by self weight when being erected in an empty space, and a supporting structure is required to support the communication optical cable along the line.

With the development of the prestress technology, the strength, rigidity and stability of a structure are improved by prestress required by bridge engineering, wind power engineering, a large-span cable net structure (such as a skyhole), building construction, a drill rod for oil well exploration and drilling, an anchor rod (cable) for mineral development, a deep sea anchor chain, a wind power blade stiffening beam (plate) and the like. The prestressed materials used at present are prestressed steel strands, prestressed steel wires, prestressed steel bars, and prestressed stay cables composed of prestressed steel strands or steel wires, and these prestressed members are life lines of engineering structures. With the widespread use of these prestressed components, the effective prestressing of the prestressed components is of increasing concern. The health condition of the whole structure, such as a cable of a cable-stayed bridge, is often judged by using the residual effective prestress value, and the health condition of the cable-stayed bridge is judged by monitoring indexes such as cable force of the cable, bridge deck linetype and the like. The existing cable force monitoring means or method for the stay cable has own defects, such as inaccuracy (great discreteness), poor durability, or incapability of real-time dynamic monitoring (manual field acquisition);

patent application No. 201711429891.2 provides a carbon fiber intelligent cable, which is characterized in that a core hole is provided at the axial center of the carbon fiber rod, an optical fiber monitoring sensor is provided in the core hole, and the core hole is filled with epoxy resin. The process (the holes are reserved, the optical fiber containing the grating is penetrated, and the holes are filled with resin) greatly increases the production difficulty, reduces the survival rate of the optical fiber grating, and is difficult to realize.

Patent application No. 201721844192.X, 201920505512.1 provides an intelligent cable and a fiber reinforced optical fiber lacing wire. The patent claim 4 specifies that the number of the cores of the multi-core optical fiber is seven, so as to realize the distinguishing measurement of temperature, stress, vibration and vibration position, and a regular hexagon with geometric stability is formed on the cross section of the fiber reinforced optical fiber lacing wire. "item 6 indicates" the intelligent cable according to claim 1, wherein: the multi-core optical fiber comprises a distributed vibration optical fiber, a high-sensitivity vibration optical fiber, a pair of distributed strain optical fibers and a pair of point strain optical fibers. "article 7" indicates a fiber-reinforced optical fiber lacing wire, characterized in that: the fiber reinforced plastic rib comprises a multi-core fiber and a fiber reinforced plastic rib wrapped around the multi-core fiber, wherein the multi-core fiber is placed in the center of the rib along the length direction of the fiber reinforced plastic rib, and the fiber reinforced fiber tie bar is manufactured through a pultrusion process. "according to claims 4, 6 and 7, if the strain of the cable is measured by using the strain optical fiber in the multi-core optical fiber, it is inferred that the cable force is inaccurate, the strain optical fiber is not tightly combined with the fiber wire in the tie bar, and the strain optical fiber cannot truly reflect the strain of the tie bar; if the vibration optical fiber is used for measuring the cable frequency, the cable force of the cable is also not accurate according to the relationship between the frequency and the cable force. The frequency-cable force relationship is generally that the assumption is that anchor points at two ends are simply supported, no pivot is arranged between the anchor points, actually, most of the stay cables are provided with built-in vibration dampers or external vibration dampers to inhibit the vibration of the stay cables, and the difference between fundamental frequency data acquired by monitoring the cable force of the stay cables at the later stage and the fundamental frequency of the stay cables is large.

Patent application numbers 201810148728.7, 201820255631.1, 201711431373.4, 201721845068.5, 201711121995.7, 201721514424.5, 201721513585.2, 201710237788.1, 201720381532.3, 201720381533.8, 201710237788.1 and the like all adopt optical fibers with gratings and also need to groove the surface of a steel wire to put the optical fibers (including the gratings), and the cable force is monitored by monitoring the wavelength change of the gratings. The grooving is only performed in the length interval to be monitored, generally within the range of the end part of the optical fiber, and the optical fiber is not arranged in the full length. The surface hardness of the steel wire is very high, so the grooving is difficult, and safety accidents easily occur in manual grooving. The grooving also brings certain damage to the steel wire, no problem exists in a short time, long-time fatigue damage is usually started from a small defect, and the service life and the safety are hidden troubles.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model provides a filled epoxy coating prestressed intelligent optical cable,

comprises an intelligent central wire, wherein a distributed optical fiber with a sensing function is embedded in the intelligent central wire, the length of the optical fiber is the same as that of the intelligent central wire,

the side wires are wrapped on the outer side wall of the intelligent center wire, the outer side wall of each side wire is provided with a first epoxy coating, a gap is reserved between the inner side wall of each side wire and the outer side wall of the intelligent center wire, and a second epoxy coating is filled in the gap.

Preferably, the cross section of the intelligent center wire is of a circular structure, and the intelligent center wire is formed by mixing one or more of carbon fiber, glass fiber and aramid fiber.

Preferably, the edge wires are arranged into six groups, and the six groups of edge wires are uniformly wound on the outer side wall of the intelligent center wire.

Preferably, a gap between the intelligent center wire and the side wire is filled with a second epoxy coating which is formed by epoxy powder through electrostatic adsorption and high-temperature melting solidification, the second epoxy coating plays a key protection role on the intelligent center wire, and tests prove that due to the second epoxy coating, when a mechanical tensile test is carried out on the optical cable, the optical cable is broken because the intelligent center wire is broken only when reaching the limit strain, and the limit breaking force is far greater than the standard limit breaking force; if the second epoxy coating is not available, the tensile strength of the intelligent center wire is only exerted by about 17%, the intelligent center wire is extruded and damaged due to the huge extrusion of the side wires, and the whole optical cable cannot reach the standard ultimate breaking force.

Preferably, the production process of the filled epoxy coating prestressed intelligent optical cable comprises the following steps:

s1: the intelligent central yarn is produced by synchronously drawing, extruding, integrally coating a protective layer and carrying out high-temperature curing on the optical fiber and the fiber yarn to prepare a round optical fiber intelligent rib with a certain diameter, because the intelligent rib is positioned at the center of a 1 multiplied by 7 structure and is specially called as the intelligent central yarn,

s2: replacing the central wire, drawing out the central steel wire according to the steel strand structure, replacing with the intelligent central wire containing optical fiber,

s3: epoxy spraying, after the step S2 is finished, putting the whole stranded wire disc into a rotatable cable disc, and preparing the filled epoxy coating prestressed intelligent optical cable after the processes of cleaning, preheating, wire scattering, epoxy spraying, re-twisting, curing, cooling and wire rewinding,

s4: after the rewinding is finished in the step S3, the wires need to be rewound and coiled because the wires are messy, and the coiled filled epoxy coating prestressed intelligent optical cable is tightly and tidily arranged and is convenient to package, store, transport and use.

The utility model has the beneficial effects

(1) The utility model can be used as a communication optical cable, has self bearing capacity after being tensioned and reliably anchored, and can realize long-distance spaced arrangement. If the fiber is buried underground, the fiber also protects the optical fiber, has the characteristics of certain bending resistance, high corrosion resistance and the like, and is convenient to arrange.

(2) The flexible support frame can be used as a flexible support frame of a photovoltaic solar cell panel, fully embodies the functions of bearing and cable force monitoring, and is convenient to master the later working state of the flexible support frame of a photovoltaic project.

(3) The utility model can realize dynamic data acquisition and analysis in real time and provide early warning by matching with a monitoring system; data can be transmitted in a long distance, and a monitoring system can be fused with an engineering monitoring center to realize centralized monitoring, so that engineering management is facilitated; even the monitoring system software can be installed in the mobile phone, the data is consistent with the cloud data, and the monitoring system software can be checked anytime and anywhere as long as a network and the mobile phone are available.

(4) The utility model solves the defects that the core hole is arranged at the axis position of the carbon fiber rod, the optical fiber monitoring sensor is arranged in the core hole, the epoxy resin is filled in the core hole and the like which are difficult to realize in production in the patent application No. 201711429891.2 (carbon fiber intelligent cable body). The distributed optical fiber and the fiber are directly drawn together, extruded, integrally coated with a protective layer, cured at high temperature and the like to form the round intelligent rib with a certain diameter, so that continuous and stable industrial flow line production can be realized, and huge market demands can be met later.

(5) The utility model solves the defect of inaccurate measurement of patent application Nos. 201721844192.X and 201920505512.1 (an intelligent stay cable and a fiber reinforced optical fiber lacing wire), adopts the technology of embedding a plurality of single-core optical fibers, wherein the single-core optical fibers are independent, the single-core optical fibers do not share an outer protective coating, all the single-core optical fibers are arranged in a fiber filament in an isometric, independent and parallel manner, and the circular intelligent rib with a certain diameter is manufactured after the technologies of synchronous traction, extrusion, integral outer protective coating, high-temperature curing and the like. Therefore, the strain type optical fiber is tightly combined with the fiber filament, and can be deformed synchronously with the fiber filament (the optical fiber and the fiber filament have no relative displacement), so that the real strain of the fiber filament can be truly reflected, and a reliable cable force value can be obtained.

(6) The utility model solves the disadvantages of the steel wires of patent application numbers 201810148728.7, 201820255631.1, 201711431373.4, 201721845068.5, 201711121995.7, 201721514424.5, 201721513585.2, 201710237788.1, 201720381532.3, 201720381533.8 and 201710237788.1 that the grooves are cut on the steel wires (the space in the grooves is used for embedding optical fibers containing gratings), the full-length arrangement is impossible, the groove cutting difficulty is high, the groove cutting risk is high, the damage to the base material is caused by the groove cutting, and the like.

(7) The outer layer of the utility model is coated with epoxy resin and has the characteristic of high corrosion resistance.

(8) According to the utility model, the intelligent central wire is a carbon fiber bar, so that a high-strength prestressed bar can be manufactured, and the ultimate tensile strength of a single carbon fiber bar can reach 2700 MPa.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Description of reference numerals: 1-intelligent central filament, 2-side filament, 3-optical fiber, 4-first epoxy coating, and 5-second epoxy coating.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

the intelligent central wire 1 is of a circular structure in cross section, the intelligent central wire 1 is formed by mixing one or more of carbon fiber, glass fiber and aramid fiber, distributed optical fibers 3 with a sensing function are embedded in the intelligent central wire 1, the length of the optical fibers 3 is the same as that of the intelligent central wire 1, the number of the embedded distributed optical fibers 3 is n1, n1 is more than or equal to 1, the distributed optical fibers 3 can be one or more of vibrating optical fibers 3, strain optical fibers 3 and temperature optical fibers 3 to achieve different engineering applications, the number of each optical fiber 3 is n2, and n2 is more than or equal to 1; preferably, n2 is a multiple of 2, so as to form a loop and improve monitoring precision, when the intelligent central wire 1 is produced, the optical fiber 3 (single or multiple) is parallel to the fiber wire and is drawn, extruded and integrally coated with a protective layer, and the optical fiber 3 is kept at the central position of the intelligent central wire 1 as much as possible; the protective layer can be epoxy resin and other materials with good protective effect, when the multiple optical fibers 3 are arranged, the multiple optical fibers can be arranged in a single row or multiple rows or disordered, compared with the prior art, the multiple optical fibers 3 are embedded independently and are not embedded with the multi-core optical fibers 3;

the side wires 2 are wrapped on the outer side wall of the intelligent center wire 1, the outer side wall of each side wire 2 is provided with a first epoxy coating 4, the side wires 2 are arranged into six groups, the six groups of side wires 2 are uniformly wound on the outer side wall of the intelligent center wire 1, a gap between the intelligent center wire 1 and each side wire 2 is filled with a second epoxy coating 5 formed by epoxy powder through electrostatic adsorption and high-temperature melting solidification, and the second epoxy coating 5 plays a key protection role on the intelligent center wire 1, and tests prove that the optical cable is broken due to the fact that the intelligent center wire 1 reaches a limit strain when the optical cable is subjected to a mechanical tensile test due to the second epoxy coating 5, and the limit breaking force is far larger than a standard limit breaking force; if the second epoxy coating 5 is not provided, the tensile strength of the intelligent central wire 1 is only exerted by about 17%, the intelligent central wire 1 is subjected to extrusion damage due to the huge extrusion of the edge wires 2, and the whole optical cable cannot reach the standard limit breaking force.

Example 2

The distributed optical fiber 3 embedded in the intelligent central wire 1 can be replaced by an optical fiber 3 containing a grating, the grating is arranged in the optical fiber 3 at intervals according to an equal length distance which can be called as a modulus, the equal length distance can be any value, for convenience, the equal length distance can be preferably set as a positive integer, for example, 10m of grating points, the optical fiber 3 with the grating carved on the optical fiber 3 with the length of thousands of meters or more is carved on an industrial production line in one-time continuous operation, then the optical fiber 3 with the carved grating and the fiber wire are synchronously pulled, extruded, integrally coated with a protective layer, cured at high temperature and other processes to form a round intelligent rib with a certain diameter, as long as the cable used in the later period is longer than 10 meters, at least one grating point can be ensured to be located in the cable length range, data can be collected when the cable is subjected to tension, and the industrial production line of the intelligent optical cable can be realized.

The present invention has been described above only for the 1 × 7 stranded structure, and the technical solution of the present invention can also be applied to other stranded structures, such as the 1 × 7 i structure, the (1 × 7) C structure, the 1 × 19S structure, and the 1 × 19W structure, and the corresponding claims are also within the scope of the present invention.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. A filled epoxy coating prestressed intelligent optical cable is characterized in that,

the intelligent central wire comprises an intelligent central wire (1), wherein distributed optical fibers (3) with a sensing function are embedded in the intelligent central wire (1), the length of each optical fiber (3) is the same as that of the intelligent central wire (1), the number of the embedded distributed optical fibers (3) is n1, and n1 is more than or equal to 1; the distributed optical fiber (3) can be set to be one or more of a vibration optical fiber (3), a strain optical fiber (3) and a temperature optical fiber (3) to realize different engineering applications, the number of each optical fiber (3) is n2, n2 is more than or equal to 1, and n2 is a multiple of 2 so as to form a loop and improve the monitoring precision;

the intelligent central wire is characterized by comprising edge wires (2), the edge wires (2) are arranged on the outer side wall of the intelligent central wire (1) in a wrapping mode, and a first epoxy coating (4) is arranged on the outer side wall of the edge wires (2).

2. A filled epoxy coated pre-stressed smart cable according to claim 1,

the cross section of the intelligent central wire (1) is of a circular structure, and the intelligent central wire (1) is formed by mixing one or more of carbon fiber, glass fiber and aramid fiber.

3. A filled epoxy coated pre-stressed smart cable according to claim 1,

the side wires (2) are arranged into six groups, and the six groups of side wires (2) are uniformly wound on the outer side wall of the intelligent center wire (1).

4. A filled epoxy coated pre-stressed smart cable according to claim 1,

and a second epoxy coating (5) formed by epoxy powder through electrostatic adsorption and high-temperature melting and curing is filled in a gap between the intelligent central wire (1) and the side wire (2).