CN111983755B - Longitudinal cutting and splicing method for optical cable bundle tube - Google Patents
Longitudinal cutting and splicing method for optical cable bundle tube Download PDFInfo
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- CN111983755B CN111983755B CN202010576417.8A CN202010576417A CN111983755B CN 111983755 B CN111983755 B CN 111983755B CN 202010576417 A CN202010576417 A CN 202010576417A CN 111983755 B CN111983755 B CN 111983755B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/245—Removing protective coverings of light guides before coupling
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2553—Splicing machines, e.g. optical fibre fusion splicer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2558—Reinforcement of splice joint
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/444—Systems or boxes with surplus lengths
- G02B6/4441—Boxes
Abstract
The invention discloses a longitudinal-cutting splicing method for an optical cable bundle tube, which comprises the following steps: s1, stripping an optical cable; s2, fixing the optical cable; s3, carrying out optical fiber splicing; s4, assembling a joint box; and S5, mechanical protection. The method for longitudinally cutting and splicing the optical cable bundle tube adopts an innovative longitudinally cutting and splicing process and a precise special tool, reduces splicing time, improves splicing quality, saves communication pipeline resources, and ensures system operation and maintenance efficiency. The invention adopts the traditional optical fiber electric arc welding method, has small connection loss, good long-term stability and high reliability.
Description
Technical Field
The invention belongs to the technical field of communication pipeline connection, relates to an optical cable connection method, and particularly relates to a longitudinal-cutting connection method for an optical cable bundle tube.
Background
Without fiber optic communications, there is no internet and communication network today. Optical fiber communication is widely used in communication networks, the internet, cable television networks and the like. Today, with the rapid rise of applications of mobile internet, cloud computing, big data and internet of things, the rapid increase of traffic also brings huge challenges to information communication networks, and optical fiber communication is still a main means for solving the problem of 'blowout type growth' of network data flow under the large trend of development towards high speed, packetization, networking and intellectualization.
The existing optical fiber splicing method has long splicing time, the splicing quality can not be effectively ensured, and the resources of optical fiber pipelines can be wasted in the splicing process.
In view of the above, there is a need to design a new optical fiber splicing method to overcome at least some of the above-mentioned disadvantages of the existing optical fiber splicing methods.
Disclosure of Invention
The invention provides a method for longitudinally cutting and splicing an optical cable bundle tube, which can reduce splicing time, improve splicing quality, save communication pipeline resources and guarantee system operation and maintenance efficiency.
In order to solve the technical problem, according to one aspect of the invention, the following technical scheme is adopted:
a method of splicing optical cable bundle tubes in longitudinal sections, the method comprising:
s1, stripping an optical cable; the method specifically comprises the following steps:
s11, longitudinally cutting the outer protection layer of the optical cable;
selecting a set longitudinal section length on a longitudinal section optical cable, and cutting the outer protective layer at a set position of the longitudinal section optical cable through a first ring cutting tool; then, longitudinally cutting the outer protective layer of the optical cable by a first longitudinal cable cutter; stripping off the outer sheath of the longitudinal section part to expose the inner sheath of the optical cable;
s12, longitudinally cutting an inner sheath of the longitudinally cut optical cable;
setting a distance from the longitudinal cutting openings of the outer protective layers at two ends, and cutting the inner protective layer at the set position of the inner protective layer of the longitudinal-cut optical cable in a ring mode through a second ring cutting tool; then, longitudinally cutting the inner protection layer of the optical cable by a second longitudinal cable cutter; stripping off the inner sheath of the longitudinal section, cleaning the exposed optical fiber bundle tube and the reinforced core, and removing the filler;
s13, longitudinally cutting the optical cable sheath twice;
determining the longitudinal-cut length of the optical cable sheath according to the central point of the forward and reverse twisting of the inner protection layer inner bundle tube, longitudinally cutting the optical cable sheath again, removing the outer sheath and the inner protection layer, cleaning the exposed optical fiber bundle tube and the reinforcement core, and removing the filler;
s14, stripping the branched optical cable;
circularly cutting the cable at a set length away from the end of the divergence cable, and extracting the cut outer sheath to expose the inner sheath;
setting a distance circular cut at the notch of the outer protective layer of the bifurcation optical cable, extracting the cut inner protective layer, cleaning the exposed optical fiber bundle tube and the reinforced core, and removing the filler;
s2, fixing the optical cable; the method specifically comprises the following steps:
s21, mounting an optical cable connecting support;
adjusting and fixing the longitudinal section optical cable and the divergence optical cable; installing an optical cable connecting bracket and an optical cable fixing clamp;
s22, pre-coiling and reserving an optical fiber bundle tube and fixing a reinforced core;
cleaning and checking an optical fiber beam tube of the longitudinal-section optical cable, and separating the beam tube to be branched from other beam tubes;
cutting off the reinforcing core according to a set length, and clamping the reinforcing core into a fixed bolt groove;
arranging and pre-coiling the straight-through beam tubes of the longitudinal-cut optical cables;
fixing the divergence optical cable on the bracket, and clamping the reinforcement core of the divergence optical cable into the fixed bolt groove;
screwing down the reinforcing core fixing bolt and slightly bending to fix the reinforcing core;
s23, installing an optical fiber disc reserved plate;
fixing the optical fiber disc reserved plate on the optical cable connecting support by using a bolt;
s24, longitudinally cutting the optical fiber bundle tube;
marking the starting positions of the two longitudinal ends of the beam tube at a certain distance from the outer sheath of the longitudinal-section optical cable, and longitudinally cutting the beam tube by using a beam tube longitudinal cutter;
cutting the bundle tube, and stripping off the bundle tube at the longitudinal section to expose the optical fiber;
cutting the bundle tube at a certain distance from the outer sheath of the branch optical cable at the plate leading-in port of the optical fiber disc, and drawing out the bundle tube to expose the optical fiber;
s25, a step of leaving an optical fiber fusion embossing disc;
coiling the straight-through optical fiber in an optical fiber coiling plate;
s3, an optical fiber splicing step; the method specifically comprises the following steps:
s31, preparing an optical fiber end face;
stripping the coating layer, cutting the fiber core and forming an optical fiber end face;
step S32, a fiber core welding step;
the optical fibers determined according to the longitudinal splicing scheme are sequentially spliced by an optical fiber fusion splicer;
s33, carrying out hot melting protection on the optical fiber connector;
protecting the optical fiber splicing part after the optical fiber splicing is qualified by welding by using a thermal shrinkage reinforced pipe;
step S34, a fiber reel remaining step;
after the optical fibers are welded, coiling and reserving the optical fibers in the accommodating disc, and ensuring that the bending radius meets the requirement;
s4, assembling a joint box; the method specifically comprises the following steps:
s41, filling the connection cards in duplicate before assembling the splice closure, and putting one splice closure into the splice closure;
s42, assembling the splice closure according to a splice closure operation process;
s43, after the joint box is assembled, checking the sealing property of the box body;
as an embodiment of the present invention, the connection method further includes step S5, a mechanical protection step;
the mechanical protection of the joint box is made according to the direct-buried, pipeline, channel and overhead laying modes and the field conditions.
As an embodiment of the present invention, the connection method further includes a step S6 of completion detection;
carrying out overall process inspection and rechecking the quality of the joint;
and (5) cleaning the construction site, and confirming 'finished work, clean material and clean site'.
In an embodiment of the present invention, in step S11, the first ring cutter is a pipe cutter, and the first longitudinal cable opener is a longitudinal cable opener;
in the step S12, the second ring cutting tool is an inner sheath ring cutting tool, and the second longitudinal cable cutter is an inner sheath stripper.
In step S24, a clamp is used to cut the bundle tube, and the bundle tube is peeled off at the longitudinal section to expose the optical fiber;
and at the plate leading-in port of the optical fiber plate, cutting the bundle pipe at a certain distance from the outer sheath of the branch optical cable by using a clamp, and drawing out to expose the optical fiber.
In step S31, as an embodiment of the present invention, the coating layer is stripped off by the fiber splitting pliers, and the core is cut by the fiber cutter to form the fiber end face.
In one embodiment of the present invention, in step S34, a shock pad is covered on each layer of the remaining optical fiber tray.
As an embodiment of the present invention, the step S3 further includes: and step S35, monitoring the connection loss in real time by using the OTDR during connection.
As an embodiment of the present invention, step S35 specifically includes:
when the connection point finishes connecting one optical fiber, the test point is informed to test;
testing the continuous loss in two directions of A-B and B-A, and carrying out arithmetic mean;
and before the optical fiber disc is packaged by the connector box after installation, retesting the connector loss.
A method of splicing optical cable bundle tubes in longitudinal sections, the method comprising:
s1, stripping an optical cable;
s2, fixing the optical cable;
s3, carrying out optical fiber splicing;
and S4, assembling the splice box.
The invention has the beneficial effects that: the method for longitudinally cutting and splicing the optical cable bundle tube adopts an innovative longitudinally cutting and splicing process and a precise special tool, reduces splicing time, improves splicing quality, saves communication pipeline resources, and ensures system operation and maintenance efficiency. The invention adopts the traditional optical fiber electric arc welding method, has small splicing loss, good long-term stability and high reliability.
The invention adopts the optical fiber bundle tube pre-coiling and reserving technology and the single optical fiber embossing coiling and reserving technology at two sides, thereby effectively reducing the influence of the degradation of the splicing quality along with the time. The invention adopts the optical time domain reflectometer to monitor the splicing loss of the optical fiber in real time, can monitor the alarm condition of the optical fiber link in use through a system network management system and the like, and furthest ensures the quality of the splicing process.
Drawings
Fig. 1 is a flow chart of a method for splicing optical cable bundle tubes in a longitudinal direction according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of an embodiment of the present invention in which the outer jacket is ring cut open.
FIG. 3 is a schematic view of a longitudinal cut through the outer jacket of the fiber optic cable according to an embodiment of the present invention.
FIG. 4 is a schematic diagram of an embodiment of the present invention with the outer jacket removed in longitudinal section to expose the inner jacket of the fiber optic cable.
FIG. 5 is a schematic view of a ring cut through the inner sheath layer in accordance with one embodiment of the present invention.
FIG. 6 is a schematic view of a longitudinal cut through the inner jacket layer of a fiber optic cable in accordance with an embodiment of the present invention.
FIG. 7 is a schematic view of an embodiment of the present invention with the filler removed from the inner sheath with the longitudinal section removed.
FIG. 8 is a schematic illustration of determining a longitudinal cross-sectional length of a cable jacket in accordance with an embodiment of the present invention.
Fig. 9 is a schematic view of a pipe cutter performing a circular cut in accordance with an embodiment of the present invention.
FIG. 10 is a schematic view of an embodiment of the present invention with the outer sheath layer cut and the inner sheath layer exposed.
Fig. 11 is a schematic diagram of a distance circular cut at the outer sheath of the bifurcated cable according to an embodiment of the present invention.
FIG. 12 is a schematic illustration of the withdrawal of the severed inner sheath and the removal of the filler, in accordance with an embodiment of the present invention.
FIG. 13 is a schematic view of an embodiment of the present invention illustrating the installation of a cable attachment bracket and a cable retention clip.
FIG. 14 is a schematic view of the core-stiffened fastening bolts being tightened and the core-stiffened being slightly bent in accordance with one embodiment of the present invention.
FIG. 15 is a schematic view of a fiber optic tray retention plate bolted to a cable attachment bracket according to one embodiment of the present invention.
FIG. 16 is a schematic view of a longitudinal cut through a bundle tube using a longitudinal cutter for the bundle tube in accordance with an embodiment of the present invention.
FIG. 17 is a schematic diagram of a beam tube cut and with the core removed to expose the core in accordance with one embodiment of the present invention.
FIG. 18 is a schematic diagram of spooling a pass-through fiber in a fiber spooling plate in accordance with an embodiment of the present invention.
FIG. 19 is a schematic diagram of a ring cut at a coating stripping position of an optical fiber according to an embodiment of the present invention.
FIG. 20 is a schematic view of coating layer stripping in one embodiment of the invention.
FIG. 21 is a schematic diagram of cutting the core with a fiber cleaver in accordance with one embodiment of the present invention.
FIG. 22 is a schematic view of forming an end face of an optical fiber in accordance with an embodiment of the present invention.
FIG. 23 is a diagram illustrating fusion splicing of two cores according to an embodiment of the present invention.
FIG. 24 is a diagram illustrating two cores after fusing together according to an embodiment of the present invention.
FIG. 25 is a schematic view of a heat-shrinkable reinforced tube for protecting a fiber splice after fusion splicing is acceptable in an embodiment of the present invention.
Fig. 26 is a schematic view of the closure assembly according to the closure operating process in one embodiment of the present invention.
Fig. 27 is another illustration of the closure assembly according to the closure handling process in one embodiment of the present invention.
Fig. 28 is a schematic view of the mechanical protection of the splice enclosure according to an embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the invention, and not to limit the scope of the claims.
The description in this section is for several exemplary embodiments only and the invention is not to be limited in scope by the embodiments described. It is within the scope of the present disclosure and claims to replace some of the features of the prior art with others that are the same or similar.
The invention discloses a longitudinal-cutting splicing method for an optical cable bundle tube, which comprises the following steps: s1, stripping an optical cable; s2, fixing the optical cable; s3, an optical fiber splicing step; and S4, assembling the splice box.
FIG. 1 is a flow chart of a method for splicing an optical cable bundle tube in a longitudinal direction according to an embodiment of the present invention; referring to fig. 1, the connection method includes:
step S1, stripping an optical cable; the method specifically comprises the following steps:
and S11, longitudinally cutting the outer protective layer of the longitudinally cut optical cable.
Selecting a set longitudinal section length on a longitudinal section optical cable 101, and cutting an outer protective layer 103 (shown in FIG. 2) at a set position (a stripping position 102 of two outer jackets of the optical cables) of the longitudinal section optical cable by a first girdling cutter ring; then, longitudinally cutting the outer protective layer of the optical cable by a first longitudinal cable cutter (as shown in figure 3); the outer jacket is stripped in longitudinal sections to expose the inner cable jacket 104 (shown in fig. 4).
In one embodiment, the first ring cutter is a pipe cutter 201 and the first longitudinal cable cutter is a longitudinal cable cutter 202.
And S12, longitudinally cutting the inner sheath layer of the optical cable.
The inner sheath is annularly cut by a second annular cutting tool at a set distance from the longitudinal cut of the outer sheaths 103 at two ends and at a set position (two inner sheath peeling positions 105) of the inner sheath 104 of the longitudinal cable (as shown in fig. 5); then longitudinally cutting the inner sheath of the optical cable by a second longitudinal cable cutter (as shown in figure 6); the inner jacket of the longitudinal section is stripped, the bare fiber bundle tube 106, the strength member core are cleaned, and the filler is removed (as shown in FIG. 7).
In one embodiment, the second ring cutter is an inner sheath ring cutter 203 and the second longitudinal cable cutter is an inner sheath stripper 204.
And S13, longitudinally cutting the optical cable sheath twice.
Determining the longitudinal-section length of the optical cable sheath according to the central point 107 of the front and back twisting of the bundle tube in the inner sheath (as shown in FIG. 8), longitudinally-cutting the optical cable sheath again, removing the outer sheath 103 and the inner sheath 104, cleaning the exposed optical fiber bundle tube 106 and the reinforced core, and removing the filler; as shown in fig. 9 to 12, the specific longitudinal cutting process can be referred to the processes of step S11 and step S12.
And S14, stripping the branched optical cable.
The girdling (which may be accomplished by a tube cutter 201, as shown in fig. 9) is performed at a set length (here, a rip-cord 112) from the end of the bifurcated optical cable 111 and the severed outer jacket 113 is withdrawn, exposing the inner jacket 114 (as shown in fig. 10).
A distance ring cut is set at the cut of the outer sheath 113 of the branched optical cable (as shown in fig. 11, the ring cut can be completed by a longitudinal cable cutter 202), the cut inner sheath 114 is drawn out, the bare optical fiber bundle tube 116 and the reinforced core are cleaned, and the filler is removed (as shown in fig. 12).
(S2) fixing the optical cable; the method specifically comprises the following steps:
and S21, mounting the optical cable connecting bracket.
Adjusting and fixing a longitudinal section optical cable 101 and a divergence optical cable 111; a cable connecting bracket 302 and a cable fixing clip 303 (shown in fig. 13) are installed.
S22, pre-coiling and reserving the optical fiber bundle tubes and fixing the reinforced cores.
The fiber bundle tubes of the profiled cable are cleaned and checked to separate the branching bundle tube 116 to be branched from the other bundle tubes. The strength member 108 is cut to a predetermined length and snapped into the anchor bolt slot. And arranging the straight through bundle tubes of the longitudinal section cables for pre-coiling and reserving (forming coiled bundle tubes 301). The branched optical cable 111 is fixed to the connecting bracket 302, and the reinforcing core 117 of the branched optical cable 111 is fitted into the fixing bolt groove. The core fixing bolts are tightened and the core is fixed by slight bending (as shown in fig. 14).
And S23, leaving a plate for installing the optical fiber disc.
The fiber optic tray retention plates are bolted to the cable attachment brackets (as shown in fig. 15).
Step S24, longitudinally cutting the optical fiber bundle tube.
The starting position of the longitudinal cut ends of the bundle tube (as bundle tube split 109) is marked at a distance from the outer jacket of the longitudinal cut cable and the bundle tube 106 is longitudinally split with a bundle tube longitudinal cutter 205 (as shown in fig. 16).
The tube is cut (in one embodiment, using a set clamp), and the tube is stripped of the longitudinal section to expose the optical fibers. At the fiber tray entry point, the bundle tube is cut and extracted at a distance from the outer jacket of the furcation cable (in one embodiment, the bundle tube is cut and extracted at a distance from the outer jacket of the furcation cable using a pincer) to expose the fiber core 109 (as shown in FIG. 17).
And S25, a fiber fusion embossing disc remaining step.
The pass-through fibers are spooled in fiber spool retention plate 118 (shown in fig. 18).
(step S3) an optical fiber splicing step; the method specifically comprises the following steps:
step S31, preparing an optical fiber end face.
The coating 123 is stripped off and the core 124 is cleaved to form the fiber end face. In one embodiment, the fiber 121 is ring cut at the coating stripping position 122 by the fiber cleaver 206, the coating is stripped (as shown in fig. 19 and 20), and the core is cut by the fiber cutter 207 to form the fiber end face (as shown in fig. 21 and 22).
Step S32, core fusing step.
The two cores 124 are fusion spliced by the fiber fusion splicer 208 (shown in fig. 23 and 24) in the order of the optical fibers determined according to the longitudinal splicing scheme.
And S33, carrying out hot melting protection on the optical fiber joint.
The fusion-spliced portion of the optical fiber is protected by a heat-shrinkable reinforcing tube 209 (as shown in fig. 25).
And S34, leaving the optical fiber reel.
And (4) coiling and reserving the optical fibers in the accommodating disc after fusion splicing, and ensuring that the bending radius meets the requirement. Each layer of the optical fiber plate reserved plate can be covered with a shock-proof pad.
In an embodiment of the present invention, the step S3 further includes:
step S35, monitoring the connection loss in real time by using an OTDR during connection; the method specifically comprises the following steps: when the connection point finishes connecting one optical fiber, the test point is informed to test; testing the continuous loss in two directions of A-B and B-A, and carrying out arithmetic mean; and before the optical fiber disc is packaged by the connector box after installation, retesting the connector loss.
Step S4, assembling a splice box; the method specifically comprises the following steps:
step S41, filling the connection cards in duplicate before assembling the splice closure, and putting one splice closure into the splice closure 211;
step S42, assembling the joint box 211 according to the joint box operation process (as shown in fig. 26 and 27); the joint box 211 may be formed by splicing two box bodies and fixed by a hexagon socket head cap screw 214. The periphery of the joint box 211 is provided with a sealing strip 212, and the joint of the joint box 211 and the optical cable is provided with a plug 213.
And S43, after the joint box is assembled, checking the tightness of the box body.
In an embodiment of the present invention, the method further includes:
step S5, mechanical protection;
the mechanical protection of the splice closure is made according to the direct burial, pipeline, channel, overhead laying mode and field conditions (as shown in figure 28). The closure 211 is secured by a shock mount 215.
Step S6, a finishing detection step;
carrying out overall process inspection and rechecking the quality of the joint;
and (5) cleaning the construction site, and confirming 'finished work, clean material and clean site'.
In summary, the optical cable bundle tube longitudinal-cutting splicing method provided by the invention adopts an innovative longitudinal-cutting splicing process and a precise special tool, reduces splicing time, improves splicing quality, saves communication pipeline resources, and ensures system operation and maintenance efficiency. The invention adopts the traditional optical fiber electric arc welding method, has small connection loss, good long-term stability and high reliability.
The invention adopts the optical fiber bundle tube pre-coiling and reserving technology and the single optical fiber embossing coiling and reserving technology at two sides, thereby effectively reducing the influence of the degradation of the splicing quality along with time. The invention adopts the optical time domain reflectometer to monitor the splicing loss of the optical fiber in real time, can monitor the alarm condition of the optical fiber link in use through a system network management system and the like, and furthest ensures the quality of the splicing process.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The description and applications of the invention herein are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Effects or advantages referred to in the embodiments may not be reflected in the embodiments due to interference of various factors, and the description of the effects or advantages is not intended to limit the embodiments. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.
Claims (9)
1. A method of splicing optical fiber cable bundle tubes in a longitudinal direction, the method comprising:
s1, stripping an optical cable; the method specifically comprises the following steps:
s11, longitudinally cutting the outer protective layer of the longitudinally cut optical cable;
selecting a set longitudinal section length on a longitudinal section optical cable, and cutting the outer protective layer at a set position of the longitudinal section optical cable through a first ring cutting tool; then, longitudinally cutting the outer protective layer of the optical cable by a first longitudinal cable cutter; stripping off the outer sheath of the longitudinal section part to expose the inner sheath of the optical cable;
s12, longitudinally cutting an inner sheath of the longitudinally cut optical cable;
setting a distance from the longitudinal cutting openings of the outer protective layers at two ends, and cutting the inner protective layer at the set position of the inner protective layer of the longitudinal-cut optical cable in a ring mode through a second ring cutting tool; then, longitudinally cutting the inner protection layer of the optical cable by a second longitudinal cable cutter; stripping off the inner sheath of the longitudinal section, cleaning the exposed optical fiber bundle tube and the reinforcing core, and removing the filler;
s13, longitudinally cutting the optical cable sheath twice;
determining the longitudinal-cutting length of the optical cable sheath according to the center point of the positive and negative twisting of the bundle tube in the inner protective layer, longitudinally cutting the optical cable sheath again, removing the outer sheath and the inner protective layer, cleaning the exposed optical fiber bundle tube and the reinforcing core, and removing the filler;
s14, stripping a bifurcated optical cable;
circularly cutting the cable at a set length away from the end of the divergence cable, and extracting the cut outer sheath to expose the inner sheath;
setting a distance circular cut at the notch of the outer protective layer of the branched optical cable, extracting the cut inner protective layer, cleaning the exposed optical fiber bundle tube and the reinforced core, and removing the filler;
s2, fixing the optical cable; the method specifically comprises the following steps:
s21, mounting an optical cable connecting support;
adjusting and fixing the longitudinal section optical cable and the divergence optical cable; installing an optical cable connecting bracket and an optical cable fixing clamp;
s22, pre-coiling and reserving an optical fiber bundle tube and fixing a reinforced core;
cleaning and checking an optical fiber bundle tube of the longitudinal-section optical cable, and separating the bundle tube to be branched from other bundle tubes;
cutting off the reinforcing core according to a set length, and clamping the reinforcing core into the fixed bolt groove;
arranging and pre-coiling the straight-through beam tubes of the longitudinal-cut optical cables;
fixing the optical cable on the bracket, and clamping the reinforcing core of the optical cable into the fixed bolt groove;
screwing the reinforcing core fixing bolt and slightly bending to fix the reinforcing core;
s23, installing an optical fiber disc reserved plate;
fixing the optical fiber disc remaining plate on the optical cable connecting bracket by using a bolt;
s24, longitudinally cutting the optical fiber bundle tube;
marking the starting positions of the two longitudinal ends of the beam tube at a certain distance from the outer sheath of the longitudinal-section optical cable, and longitudinally cutting the beam tube by using a longitudinal cutter of the beam tube;
cutting the bundle tube, and stripping off the longitudinal section of the bundle tube to expose the optical fiber;
cutting a bundle tube at a certain distance from the outer sheath of the branch optical cable at the plate leading-in port of the optical fiber disc, and drawing out the bundle tube to expose the optical fiber;
s25, a fiber fusion embossing disc remaining step;
coiling the straight-through optical fiber in an optical fiber coiling plate;
s3, carrying out optical fiber splicing; the method specifically comprises the following steps:
s31, preparing an optical fiber end face;
stripping the coating layer, cutting the fiber core and forming an optical fiber end face;
step S32, a fiber core welding step;
the optical fibers determined according to the longitudinal splicing scheme are sequentially spliced by an optical fiber fusion splicer;
s33, carrying out hot melting protection on the optical fiber connector;
protecting the optical fiber splicing part after the optical fiber splicing is qualified by welding by using a thermal shrinkage reinforced pipe;
step S34, a fiber reel remaining step;
after the optical fibers are welded, coiling and reserving the optical fibers in the accommodating disc, and ensuring that the bending radius meets the requirement;
s4, assembling a joint box; the method specifically comprises the following steps:
s41, filling a connection card in duplicate before assembling the splice closure, and putting one part into the splice closure;
s42, assembling the splice closure according to a splice closure operation process;
and S43, after the joint box is assembled, checking the tightness of the box body.
2. A method of splicing optical fiber cable tubes in longitudinal sections according to claim 1, wherein:
the connecting method further comprises a step S5 of mechanical protection; the mechanical protection of the joint box is made according to the direct-buried, pipeline, channel and overhead laying modes and the field conditions.
3. A method of splicing optical fiber cable tubes in longitudinal sections according to claim 1, wherein:
the connecting method further comprises a step S6 of finishing detection; carrying out overall process inspection and rechecking the quality of the joint; and (5) cleaning a construction site, and confirming that the construction is finished, the material is clean and the site is clean.
4. A method of splicing optical fiber cable bundle tubes according to claim 1, wherein:
in the step S11, the first annular cutter is a pipe cutter, and the first longitudinal cable opener is a longitudinal cable opener;
in the step S12, the second ring cutting tool is an inner sheath ring cutting tool, and the second longitudinal cable cutter is an inner sheath stripper.
5. A method of splicing optical fiber cable tubes in longitudinal sections according to claim 1, wherein:
in step S24, the bundle tube is cut by using a pincer, and the bundle tube in the longitudinal section is peeled off to expose the optical fiber; and at the plate leading-in port of the optical fiber disc, cutting the bundle tube at a certain distance from the outer sheath of the branch optical cable by using a clamp, and drawing out to expose the optical fiber.
6. A method of splicing optical fiber cable bundle tubes according to claim 1, wherein:
in the step S31, the coating layer is stripped by the optical fiber cutting pliers, and the fiber core is cut by the optical fiber cutter to form the optical fiber end face.
7. A method of splicing optical fiber cable bundle tubes according to claim 1, wherein:
in step S34, a shock pad is covered on each layer of the remaining optical fiber tray.
8. A method of splicing optical fiber cable bundle tubes according to claim 1, wherein:
the step S3 further includes: and step S35, monitoring the connection loss in real time by using the OTDR during connection.
9. A method of splicing optical fiber cable bundle tubes according to claim 8, wherein:
step S35 specifically includes:
when the connection point finishes connecting one optical fiber, the test point is informed to test;
testing the continuous loss in the two directions of A-B and B-A, and carrying out arithmetic mean;
and before the optical fiber disc is packaged by the connector box after installation, retesting the connector loss.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010576417.8A CN111983755B (en) | 2020-06-22 | 2020-06-22 | Longitudinal cutting and splicing method for optical cable bundle tube |
| PCT/CN2021/073873 WO2021258729A1 (en) | 2020-06-22 | 2021-01-27 | Optical cable bundle tube longitudinal section connection method |
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| CN202010576417.8A CN111983755B (en) | 2020-06-22 | 2020-06-22 | Longitudinal cutting and splicing method for optical cable bundle tube |
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| CN111983755B true CN111983755B (en) | 2022-11-11 |
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| CN111983755B (en) * | 2020-06-22 | 2022-11-11 | 中国铁路通信信号上海工程局集团有限公司 | Longitudinal cutting and splicing method for optical cable bundle tube |
| CN117572563B (en) * | 2024-01-16 | 2024-03-29 | 江苏亨通光电股份有限公司 | Multi-core optical fiber ribbon cable and connecting method thereof |
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| CN111983755B (en) * | 2020-06-22 | 2022-11-11 | 中国铁路通信信号上海工程局集团有限公司 | Longitudinal cutting and splicing method for optical cable bundle tube |
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| JP2013113925A (en) * | 2011-11-25 | 2013-06-10 | Nippon Tsushin Denzai Kk | Closure for optical fiber connection |
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| WO2021258729A1 (en) | 2021-12-30 |
| CN111983755A (en) | 2020-11-24 |
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