CN114296194A - Pressure-resistant optical fiber ribbon cable and preparation method thereof - Google Patents
Pressure-resistant optical fiber ribbon cable and preparation method thereof Download PDFInfo
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- CN114296194A CN114296194A CN202111633198.3A CN202111633198A CN114296194A CN 114296194 A CN114296194 A CN 114296194A CN 202111633198 A CN202111633198 A CN 202111633198A CN 114296194 A CN114296194 A CN 114296194A
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Abstract
The invention provides a pressure-resistant optical fiber ribbon cable which comprises a cable core, wherein a polyester water-blocking tape is wrapped outside the cable core, a yarn-tying water-blocking tape is wrapped between the cable core and the polyester water-blocking tape and outside the polyester water-blocking tape, a metal armor layer is wrapped outside the yarn-tying water-blocking tape at the outer layer, and an outer sheath is extruded outside the metal armor layer; the cable core comprises a reinforcing member positioned in the center of the optical cable, a plurality of optical fiber units are arranged outside the reinforcing member, a filling rope is arranged between every two optical fiber units, the reinforcing member, the optical fiber units and the filling ropes are twisted into the cable core, and water-blocking cable paste is filled in the gap of the cable core again; the optical fiber unit comprises a loose tube, a plurality of optical fiber ribbons stacked in sequence are contained in the loose tube, and fiber paste is filled in gaps between the loose tube and the optical fiber ribbons. The invention improves the optical fiber ribbon cable on the pressure resistance and the torsion resistance, and improves the water resistance of the product so as to utilize the application of the product in multi-environment.
Description
Technical Field
The invention relates to the field of optical signal transmission in the mobile communication system technology, in particular to a pressure-resistant optical fiber ribbon cable and a preparation method thereof.
Background
With the 5G business and the digitization and intelligent transformation, the requirements of people on transmission rate and bandwidth are higher and higher, and the development of well-injection type is met by machine room construction and base station construction nationwide. Because our country's amplitude personnel are wide, the topography is various, the site selection of computer lab and base station also can cover a series of special environments such as forest, hillside, so a series of requirements have been proposed to optical fiber ribbon cable on resistance to compression, block water and antitorque performance, in order to solve optical fiber ribbon cable because the big performance of cable footpath exists resistance to compression, block water and antitorque scheduling problem, innovation and design have all been carried out from product structure to technology, developed a section to the optical fiber ribbon cable of resistance to compression, antitorque and water.
Disclosure of Invention
In order to solve the technical problems, the invention provides a pressure-resistant optical fiber ribbon cable which is improved in pressure resistance and torsion resistance and water resistance of a product, so that the application of the product in a multi-environment is utilized.
The invention also discloses a preparation method of the pressure-resistant optical fiber ribbon cable.
The invention relates to a pressure-resistant optical fiber ribbon cable which comprises a cable core, wherein the cable core comprises a polyester water-blocking tape wrapped outside the cable core, a binding yarn water-blocking tape is wrapped between the cable core and the polyester water-blocking tape and outside the polyester water-blocking tape, a metal armor layer is wrapped outside the outer binding yarn water-blocking tape, and an outer sheath is extruded outside the metal armor layer; the cable core comprises a reinforcing member positioned in the center of the optical cable, a plurality of optical fiber units are arranged outside the reinforcing member, a filling rope is arranged between every two optical fiber units, the reinforcing member, the optical fiber units and the filling ropes are twisted into the cable core, and water-blocking cable paste is filled in the gap of the cable core again; the optical fiber unit comprises a loose tube, a plurality of optical fiber ribbons stacked in sequence are contained in the loose tube, and fiber paste is filled in gaps between the loose tube and the optical fiber ribbons.
Further optimizing, the optical fiber ribbon is flat and comprises optical fibers which are transversely and sequentially arranged in different colors, and a flat resin fixing sleeve is extruded outside all the optical fibers; the upper surface of the resin fixing sleeve is symmetrically provided with a group of concave grooves, and the lower surface of the resin fixing sleeve is symmetrically provided with a group of convex grooves which are butted with the concave grooves.
And further optimizing, taking the central connecting line of the first optical fiber and the last optical fiber as a reference line, wherein the difference between the central positions of the optical fibers with different colors and the reference line is less than 30 nm.
Further optimizing, the two ends of the metal armor layer are connected through metal armor connecting buckles.
The polyester water-blocking tape comprises two surfaces, wherein one surface is a polyester film and faces the cable core, and the other surface is a water-blocking layer formed by mixing water-blocking powder and high-molecular water-absorbing resin.
A preparation method of a pressure-resistant optical fiber ribbon cable comprises the following steps:
1) and (3) coloring the optical fiber: the method comprises the steps that an optical fiber passes through a die filled with ink inside in an active pay-off mode, the color of the ink can be selected according to requirements, the optical fiber coated with the ink is cured by a UV lamp, the curing power, the take-up tension, the pay-off tension and the production speed of colored optical fiber UV lamps with different colors are required to be consistent, the curing power and the production speed of the UV lamp are required to be matched, a 2-level UV lamp curing design is adopted, when the power of the UV lamp is 6000W, the power output of the UV lamp is adjusted to be 100%, and at the moment, the production speed is not larger than 600 m/min;
2) preparing an optical fiber ribbon: optical fibers with different colors are discharged through a cylinder type active pay-off rack, the ordering and the number of the optical fibers with different colors can be placed according to requirements, the color, the ordering and the number of the optical fibers required by the optical fiber ribbon to be prepared are led into a system, the optical fibers sequentially pass through a fiber collecting wheel, an optical fiber color recognition device, a coating mold, a curing oven, the fiber collecting wheel and a take-up device through a guide wheel, then optical fiber ribbon resin passes through a pressure coating mold and is distributed on the periphery of the optical fibers with different colors, the optical fiber ribbon resin is converged into a mold size through the coating mold, then the curing and shaping are carried out through the curing oven, the optical fiber ribbon with two symmetrical concave grooves on the upper side and two symmetrical convex grooves on the lower side is formed, and the optical fiber ribbon is taken up on a turnover disc tool through the take-up device; before the optical fiber ribbon resin enters a coating die, a box body for collecting the optical fiber ribbon resin is statically placed in constant-temperature water at 48 ℃ and is subjected to bubble removal treatment;
in the production process, the optical fiber color identification device can monitor the color difference of each color of the optical fiber, the number and the sequence of the colors in real time, so that the qualification rate of the finished optical fiber ribbon is improved;
3) preparation of the optical fiber unit: the method comprises the following steps that a plurality of prepared optical fiber ribbons are actively discharged through an optical fiber ribbon pay-off device and sequentially pass through a wire guide die, a wire converging die and a wire passing die, the convex surfaces of the optical fiber ribbons face downwards, one optical fiber ribbon passes through a wire guide shaft of the wire guide die and then passes through the wire converging die, the protruding part corresponds to the protruding part of the wire converging die to form a stack, then the stacked optical fiber ribbons pass through the wire passing die, the neatness and completeness of the stacked optical fiber ribbons are guaranteed through the above operations, fiber paste injection holes are respectively arranged at the wire guide die and the wire converging die, fiber paste is injected among the optical fiber ribbons, the injected fiber paste needs to be subjected to bubble removal treatment, the stacked optical fiber ribbons enter a die core and a die sleeve through oil needles, an extruding machine extrudes a loose tube through the die core and the die sleeve, the loose tube is cooled to form optical fiber units, and the optical fiber units are orderly received on a disc;
4) the optical fiber unit, the reinforcing member and the filling rope are all released through active paying-off, the reinforcing member is centered, the optical fiber unit and the filling rope are wound outside the reinforcing member in an SZ twisting mode, four corners of the optical fiber unit are symmetrically placed, the filling rope is located in gaps of the four corners, a cable paste filling hole is formed in a twisting table, cable core gaps are filled through cable paste through pressure filling, a yarn binding machine is synchronously designed with double ends and is respectively wound outside the cable core and the polyester water blocking tape in a one-way mode, and the pitch is controlled to be 35-45 mm; the polyester water-blocking tape adopts an airplane mold longitudinal wrapping forming process, and is wrapped outside the binding yarn water-blocking tape;
5) the cable core wrapped with the polyester water-blocking tape is released through a gantry pay-off rack, the metal armor connecting buckle and the metal band are released through active tape release, the metal band is stored by a metal band storage device when the metal band is connected, the metal band is connected through the metal band connecting device, continuous production without shutdown is realized, when the metal band is produced normally, the size of the metal band is cut to the required width through a trimming die, a cut flaw-piece is wound onto double wheels at two sides of the trimming device through a motor, the cut metal band is aligned and positioned through a metal band threading die, the aligned metal band, the metal armor connecting buckle and the cable core wrapped with the water-blocking polyester tape enter the corresponding position of a metal band forming die, the metal band longitudinally wraps into a round shape from a straight line shape, the metal armor connecting buckle is connected, and the metal armor layer wrapped with the cable core is subjected to size stretching through a metal band sizing die, then, the outer sheath is extruded through a mold core and a mold sleeve in the head of the extruding machine and through a sheath material, and finally the formed cable is collected on a disc after cooling.
Further optimization, the optical fiber color recognition device comprises three functions of extraction, recognition and early warning;
a equipment for optic fibre colour draws is colour collector, colour collector is located between collection fine wheel and the coating mould, be used for carrying out the colour to multiple optic fibre and draw, colour collector is by light source device, the image is drawed and transmission device constitutes, 6 faces are constituteed by separating light glass and black light-proof membrane about the colour collector is all around, colour collector's light source device is connected with the equipment host computer, after selecting the light source as required on the host computer, light source device can select corresponding light source after the start and shine, light source lamp has been installed respectively in four corners of colour collector to light source device, light source lamp contains 5 kinds of light source confession options altogether and is respectively: the LED lamp comprises a D65 light source, a TL84/P15, an A light source, an H light source and a UV light source, which can be selected and switched according to requirements; the image extraction is provided by a 360-degree symmetrical CCD camera, and the CCD camera adopts spherical collection aiming at the round optical fiber, so that the color collection accuracy is improved; respectively transmitting the acquired optical fiber colors and the sequence to an equipment host through a transmission device; the transmission device of the color collector is an image editor and a transmission data line;
the device host is used for identifying the color of the optical fiber and comprises light source selection, the color of the optical fiber and sequencing functions, the host can be started after the functions are set, the device host simultaneously comprises color comparison and early warning functions, images provided by 360-degree symmetrical CCD cameras are subjected to bidirectional comparison through a program, and if color errors and color overruns occur, the device host transmits an early warning signal to an early warning lamp and slowly stops the device;
the device for optical fiber color early warning is an early warning lamp which has the functions of red light flickering and warning rumbling, and acousto-optic early warning can be carried out through early warning signals.
The polyester water-blocking tape is further optimized to have two sides, one side is a polyester film, and in the thermoplastic forming process of the polyester film, air suction and impurity filtering procedures are added, so that molecular gaps and impurities are reduced, and the molecular gaps are ensured to be smaller than the diameter of water-blocking powder; the other side is a water-resistant layer formed by mixing water-resistant powder and high-molecular water-absorbent resin, and the two sides are uniformly baked at high temperature through an anhydrous adhesive, pulled by a die and cooled for forming; the polyester film wraps the cable core, and the water-blocking layer faces the metal armor layer, so that the design reason is that the B surface is a mixture of water-blocking powder and high-molecular water-absorbing resin and is easy to have compatibility with the fiber paste, the product performance is influenced after chemical reaction, and the A surface is the polyester film and is not compatible with the fiber paste, so that the effect of isolating the B surface from the fiber paste is achieved.
Further optimizing, the wire guide die in the step 3) is in a plug board mode, a plurality of wire guide shafts are arranged, the distance between every two wire guide shafts is the thickness H +0.1mm of the optical fiber tape, and the width L +1 mm; porcelain treatment is carried out on the surface of the lead shaft, and bearings are designed at two ends of the lead shaft;
the wire converging die is of a plug board die, is in a cuboid shape and has the size: the thickness H +0.1mm and the width L +0.3mm of the optical fiber ribbon are realized, and the positioning and accurate positioning of the optical fiber ribbon are realized through a converging module;
the threading die is of a cylindrical structure, the center of the threading die is a rectangular through die, and the threading die is used for positioning a plurality of optical fiber ribbons stacked in sequence and preventing dislocation and overturning in the production process.
Further optimizing, in the step 5), an open groove is formed in the center of the metal belt threading die, the metal belt threading die is divided into cuboids with the same upper part and the lower part, the height of the groove is H +0.1mm of the thickness of the metal belt, and the depth of the groove is 2/3 of the depth of a single cuboid; the metal strip threading die can be used for adjusting the height and the width and correcting and positioning the metal strip;
the metal strip forming die is of a cylindrical structure, the center of the metal strip forming die is a circular through hole, an arc I-shaped through hole is formed above the circular through hole, circular-arc metal strip forming holes are formed in grooves in two ends of the arc I-shaped through hole, and two ends of each circular-arc metal strip forming hole are inserted into 4/5 positions of the corresponding groove.
The metal strap sizing die is of a cylindrical T-shaped structure, so that the die is convenient to fix, and the size of a metal armor layer after being connected through the metal armor connecting buckle is ensured by the design of a circular through hole, and meanwhile, the metal strap is ensured to be completely positioned and in close contact in the I-shaped structure of the metal armor connecting buckle.
The invention has the beneficial effects that:
the loose tube comprises a plurality of optical fiber ribbons which are stacked in sequence, the central positions of the optical fiber ribbons are optical fibers with different colors, the central positions of the optical fibers are used as datum lines, the difference value between the central positions of the optical fibers with different colors and the datum lines is less than 30nm, the optical fibers are connected and wrapped through resin, two concave grooves are symmetrically designed on the resin wrapped on the optical fibers, the optical fiber ribbons are fixed through right-angle side design, two convex grooves are symmetrically designed on the resin wrapped under the optical fibers, the connection between the optical fiber ribbons is realized through the concave grooves, the connection stability is improved through the symmetrical design, and a series of problems of dislocation, ribbon turning, torsion and the like easily occurring after the plurality of optical fiber ribbons are stacked in the loose tube are solved through the design.
The invention realizes the functions of 3 meters of water column, 1 meter of optical cable and 24 hours of no water seepage; the invention realizes the full coverage of the water-blocking material to the optical cable gap, the fiber paste covers the cable core gap, and the fiber paste expands in water to block water in the inner layer of the cable core; the polyester water-blocking tape covers the inner layer of the metal armor layer, and the water-blocking powder and the high-molecular water-absorbing resin mixture on one surface of the polyester water-blocking tape swell in water to block water in the metal armor layer, so that bilateral water blocking of the cable core, the inner layer of the metal armor layer and the cable core is realized.
The loose tube is symmetrically arranged at four corners, the center of the loose tube is supported by the reinforcing member, and the gaps at the four corners are filled with the filling ropes, so that the structure of a four-in-one structure ensures that the reinforcing elements are simultaneously stressed under load, and avoids the phenomenon of uneven stress of the bundle tube; the metal armor layers are connected through metal armor connecting buckles, the metal armor layers are subjected to edge cutting treatment, the cable is of a circular structure, two ends of the cable are connected through the metal armor connecting buckles, the metal armor connecting buckles are of I-shaped arc structures, and the metal armor connecting buckles are connected in a tight fit mode; the design avoids the problems of water seepage and torsional cracking caused by lapping of metal strips, and improves the water resistance and the lateral pressure resistance of the optical cable; under the load of 5000N/100mm, the surface of the sheath is not damaged, and the 1550nm additional attenuation of the optical fiber is less than or equal to 0.05 dB.
In conclusion, the optical fiber ribbon cable is improved, researched and developed on the pressure resistance and torsion resistance, and the water resistance of the product is improved, so that the application of the product in a multi-environment is facilitated.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a ribbon configuration;
FIG. 3 is a schematic structural diagram of a metal armor layer
FIG. 4 is a schematic diagram of a tooling structure for preparing an optical fiber ribbon;
FIG. 5 is a schematic diagram of a fiber unit manufacturing tool;
FIG. 6 is a schematic structural diagram of a tooling for manufacturing a metal armor layer.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1, a pressure-resistant optical fiber ribbon cable includes a reinforcing member 4 located at the center of the cable, a plurality of optical fiber units are arranged outside the reinforcing member, and a filling rope 5 is arranged between every two optical fiber units; twisting the reinforcing member, the optical fiber units and the filling ropes into a cable core, and filling water-blocking cable paste 7 into the gap of the cable core again; the cable comprises a cable core, wherein a polyester water-blocking tape 9 is wrapped outside the cable core, a yarn-tying water-blocking tape 8 is wrapped between the cable core and the polyester water-blocking tape 9 and outside the polyester water-blocking tape 9, a metal armor layer 6 is wrapped outside the yarn-tying water-blocking tape 8 at the outer layer, and an outer sheath 1 is extruded outside the metal armor layer;
the optical fiber unit comprises a loose tube 10, a plurality of optical fiber ribbons 2 stacked in sequence are contained in the loose tube, and fiber paste 5 is filled in gaps between the loose tube and the optical fiber ribbons.
As shown in fig. 2, the optical fiber ribbon is flat, and includes optical fibers 12 of different colors arranged in sequence in a transverse direction, and a flat resin fixing jacket 13 is extruded outside all the optical fibers; the upper surface symmetry of fixed cover of resin be equipped with a set of concave groove 14, the lower surface symmetry is equipped with a set of convex groove 15 that is used for butting with the concave groove, a series of problems such as dislocation, area of turning over, torsion that easily appear after a plurality of optical fiber ribbons 2 pile up in the pine sleeve.
As shown in fig. 3, both ends of the metal clad layer 6 are connected by a metal clad connector buckle 10.
As shown in fig. 4-6, a method for preparing a pressure-resistant optical fiber ribbon cable comprises the following steps:
1) and (3) coloring the optical fiber: the method comprises the steps that an optical fiber passes through a die filled with ink inside in an active pay-off mode, the color of the ink can be selected according to requirements, the optical fiber coated with the ink is cured by a UV lamp, the curing power, the take-up tension, the pay-off tension and the production speed of colored optical fiber UV lamps with different colors are required to be consistent, the curing power and the production speed of the UV lamp are required to be matched, a 2-level UV lamp curing design is adopted, when the power of the UV lamp is 6000W, the power output of the UV lamp is adjusted to be 100%, and at the moment, the production speed is not larger than 600 m/min;
2) preparing an optical fiber ribbon: optical fibers with different colors are discharged through a cylinder type active pay-off rack, the ordering and the number of the optical fibers with different colors can be placed according to requirements, the color, the ordering and the number of the optical fibers needed by the optical fiber ribbon to be prepared are led into the system, the optical fibers sequentially pass through a fiber collecting wheel 17, an optical fiber color recognition device, a coating mold 18, a curing furnace 19, a fiber collecting wheel and a take-up device through a guide wheel 16, optical fiber ribbon resin is distributed in the pressure coating mold and is distributed on the periphery of the optical fibers with different colors, the optical fiber ribbon resin is converged into a mold size through the coating mold, then the curing and shaping are carried out through the curing furnace, the optical fiber ribbon with two symmetrical concave grooves on the upper side and two symmetrical convex grooves on the lower side is formed, and the optical fiber ribbon is taken up on a turnover disc through the take-up device; before the optical fiber ribbon resin enters a coating die, a box body for collecting the optical fiber ribbon resin is placed in a constant-temperature water area at 48 ℃ and is subjected to bubble removal treatment, and the prepared optical fiber ribbon is collected on a peripheral turntable;
in the production process, the optical fiber color identification device can monitor the color difference of each color of the optical fiber, the number and the sequence of the colors in real time, so that the qualification rate of the finished optical fiber ribbon is improved;
3) preparation of the optical fiber unit: the prepared optical fiber ribbons are actively released by an optical fiber ribbon pay-off device 23 and sequentially pass through a wire guide die 24, a wire collecting die 25 and a wire passing die 26 respectively, the convex surfaces of the optical fiber ribbons face downwards, one optical fiber ribbon passes through a wire guide shaft of the wire guide die and then passes through the wire collecting die, the convex part corresponds to the convex part of the wire collecting die to form a stack, then the stacked optical fiber ribbon 2 passes through the threading die, the above operation ensures the neatness and integrity of the stacked optical fiber ribbon 2, respectively arranging fiber paste injection holes at the positions of the wire guide die and the wire converging die, injecting fiber paste among a plurality of optical fiber ribbons, wherein the injected fiber paste needs to be subjected to bubble removal treatment, the stacked optical fiber ribbons enter the die core and the die sleeve through oil needles, a plastic extruding machine 27 extrudes a loose tube through the die core and the die sleeve, the loose tube is cooled to form optical fiber units, and the optical fiber units are orderly received on a turnover disc;
4) the optical fiber unit, the reinforcing member and the filling rope are all released through active paying-off, the reinforcing member is centered, the optical fiber unit and the filling rope are wound outside the reinforcing member in an SZ twisting mode, four corners of the optical fiber unit are symmetrically placed, the filling rope is located in gaps of the four corners, a cable paste filling hole is formed in a twisting table, cable core gaps are filled through cable paste through pressure filling, a yarn binding machine is synchronously designed with double ends and is respectively wound outside the cable core and the water-blocking polyester tape 9 in a one-way mode, and the pitch is controlled to be 35-45 mm; the polyester water-blocking tape 9 is formed by adopting a longitudinal wrapping forming process of an airplane mold, and the polyester water-blocking tape 9 is wrapped outside the yarn-tying water-blocking tape 8.
5) The cable core wrapped with the polyester water blocking tape 9 is released through a gantry pay-off rack 35, the metal armor connecting buckle 10 and the metal band are actively released through a metal armor connecting buckle pay-off rack 28 and a metal band pay-off rack 29 respectively, the metal band is stored and connected by a metal band storage device 30 when being connected, continuous production without shutdown is realized, when the metal band is normally produced, the size of the metal band is firstly cut to the required width through a side cutting device 31, a cut flaw-piece is collected to double wheels at two sides of the side cutting device through a motor, the cut metal band is straightened and positioned through a metal band passing mold 32, the straightened metal band, the metal armor connecting buckle 10 and the cable core wrapped with the polyester water blocking tape 9 enter corresponding positions of a metal band forming mold 33, the metal band is wrapped into a round shape from a straight line shape and is connected through the metal armor connecting buckle 10, the metal armor layer 6 wrapped with the cable core is subjected to size stretching through a metal tape sizing die 34, then passes through a die core and a die sleeve in the head of the extruding machine 27, passes through a sheath material extrusion molding outer sheath, and then is cooled to finally wrap the formed cable on a disc tool.
The optical fiber color recognition device in the step 2) comprises three functions of extraction, recognition and early warning;
the device for extracting the optical fiber color is a color collector 20, the color collector is positioned between a fiber collecting wheel and a coating die and used for extracting the color of various optical fibers, the color collector consists of a light source device and an image extracting and transmitting device, and the front, the back, the left, the right, the upper and the lower 6 surfaces of the color collector consist of light-blocking glass and black light-blocking films (the light-blocking glass and the black light-blocking films block visible light, infrared rays and ultraviolet rays, the blocking rate reaches more than 95 percent, but the device does not have the heat-insulating function); the light source device of the color collector is connected with the equipment host, after the light source is selected according to requirements on the host, the light source device can select a corresponding light source to irradiate after the host is started, the light source device is respectively provided with light source lamps at four corners of the color collector, and the light source lamps contain 5 light sources for selection respectively: the LED lamp comprises a D65 light source, a TL84/P15, an A light source, an H light source and a UV light source, which can be selected and switched according to requirements; the image extraction is provided by a 360-degree symmetrical CCD camera, and the CCD camera adopts spherical collection aiming at the round optical fiber, so that the color collection accuracy is improved; respectively transmitting the acquired optical fiber colors and the sequence to an equipment host through a transmission device; the transmission device of the color collector is an image editor and a transmission data line.
The device host 21 is used for identifying the color of the optical fiber, the device host comprises light source selection, the color of the optical fiber and sequencing functions, the functions can be started after the setting, the device host simultaneously comprises color comparison and early warning functions, images provided by 360-degree symmetrical CCD cameras are compared in a two-way mode through a program, and if color errors and color overruns occur, the device host transmits an early warning signal to an early warning lamp and slowly stops the device;
the device for optical fiber color early warning is an early warning lamp 22 which has the functions of red light flickering and warning rumbling and can carry out acousto-optic early warning through early warning signals.
The polyester water-blocking tape has two sides, one side is a polyester film, and in the thermoplastic forming process of the polyester film, air suction and impurity filtering processes are added, so that molecular gaps and impurities are reduced, and the molecular gaps are ensured to be smaller than the diameter of water-blocking powder; the other side is a water-resistant layer formed by mixing water-resistant powder and high-molecular water-absorbent resin, and the two sides are uniformly baked at high temperature through an anhydrous adhesive, pulled by a die and cooled for forming; the polyester film wraps the cable core, and the water-blocking layer faces the metal armor layer, so that the design reason is that the B surface is a mixture of water-blocking powder and high-molecular water-absorbing resin and is easy to have compatibility with the fiber paste, the product performance is influenced after chemical reaction, and the A surface is the polyester film and is not compatible with the fiber paste, so that the effect of isolating the B surface from the fiber paste is achieved.
It should be noted that: in order to accurately position the concave-convex groove, a special wire guide die, a wire converging die and a wire passing die are also designed;
the lead wire module is in a plug board mode and can be replaced according to the number of the optical fiber ribbons; the wire guide die is provided with a plurality of wire guide shafts, the distance between every two wire guide shafts is H +0.1mm of the thickness of the optical fiber tape, and the width of the optical fiber tape is L +1 mm; the surface of the lead shaft is subjected to porcelain treatment, so that the damage to the optical fiber ribbon caused by the deformation of the surface of the lead shaft after the optical fiber ribbon is continuously rubbed is reduced, and meanwhile, bearings are designed at two ends of the lead shaft, so that the friction force during rolling is reduced, and the damage to the optical fiber ribbon caused by positioning and guiding is reduced as much as possible;
the wire collecting die is configured behind the wire guiding die, the wire collecting die is in a plug board mode and is in a cuboid shape, and the size is as follows: the thickness H +0.1mm and the width L +0.3mm of the optical fiber ribbon are realized, and the positioning and accurate positioning of the optical fiber ribbon are realized through a converging module;
the line-crossing die is configured behind the line-converging die, the line-crossing die is of a cylindrical structure, the center of the line-crossing die penetrates through the die in a rectangular shape, and the line-crossing die is used for positioning a plurality of optical fiber ribbons stacked in sequence to prevent dislocation and overturning in the production process.
It should be noted that: in order to complete the one-step forming of the metal armor connecting buckle 10 connected with the metal armor layer 6 in the production process, a special metal strip threading die, a metal strip forming die and a metal strip sizing die are also designed;
the center of the metal strip threading die is provided with an open-type groove, the metal strip threading die is divided into cuboids with the same upper part and lower part, the height of the groove is H +0.1mm of the thickness of the metal strip, and the depth of the groove is 2/3 of the depth of a single cuboid; the metal strip threading die can be used for adjusting the height and the width and correcting and positioning the metal strip, so that the problems of strip turning, edge curling and the like caused by dislocation and unevenness in the forming process are avoided, and the metal strip is convenient to form at one time;
the metal strip forming die is of a cylindrical structure, the center of the metal strip forming die is a circular through hole, an arc-shaped I-shaped through hole is formed above the circular through hole, arc-shaped metal strip forming holes are formed in grooves at two ends of the arc-shaped I-shaped through hole, two ends of each arc-shaped metal strip forming hole are inserted into 4/5 positions of the grooves, the metal armor connecting buckle 10 and the metal strip are fixed through the design, and one-step forming in the production process is guaranteed;
the metal strap sizing die is of a cylindrical T-shaped structure, so that the die is convenient to fix, and the size of a metal armor layer after being connected through the metal armor connecting buckle is ensured by the design of a circular through hole, and meanwhile, the metal strap is ensured to be completely positioned and in close contact in the I-shaped structure of the metal armor connecting buckle.
The loose tube comprises a plurality of optical fiber ribbons which are stacked in sequence, the central positions of the optical fiber ribbons are optical fibers with different colors, the central positions of the optical fibers are used as datum lines, the difference value between the central positions of the optical fibers with different colors and the datum lines is less than 30nm, the optical fibers are connected and wrapped through resin, two concave grooves are symmetrically designed on the resin wrapped on the optical fibers, the optical fiber ribbons are fixed through right-angle side design, two convex grooves are symmetrically designed on the resin wrapped under the optical fibers, the connection between the optical fiber ribbons is realized through the concave grooves, the connection stability is improved through the symmetrical design, and a series of problems of dislocation, ribbon turning, torsion and the like easily occurring after the plurality of optical fiber ribbons are stacked in the loose tube are solved through the design.
The invention realizes the functions of 3 meters of water column, 1 meter of optical cable and 24 hours of no water seepage; the invention realizes the full coverage of the water-blocking material to the optical cable gap, the fiber paste covers the cable core gap, and the fiber paste expands in water to block water in the inner layer of the cable core; the polyester water-blocking tape covers the inner layer of the metal armor layer, and the water-blocking powder and the high-molecular water-absorbing resin mixture on one surface of the polyester water-blocking tape swell in water to block water in the metal armor layer, so that bilateral water blocking of the cable core, the inner layer of the metal armor layer and the cable core is realized.
The loose tube is symmetrically arranged at four corners, the center of the loose tube is supported by the reinforcing member, and the gaps at the four corners are filled with the filling ropes, so that the structure of a four-in-one structure ensures that the reinforcing elements are simultaneously stressed under load, and avoids the phenomenon of uneven stress of the bundle tube; the metal armor layers are connected through metal armor connecting buckles, the metal armor layers are subjected to edge cutting treatment, the cable is of a circular structure, two ends of the cable are connected through the metal armor connecting buckles, the metal armor connecting buckles are of I-shaped arc structures, and the metal armor connecting buckles are connected in a tight fit mode; the design avoids the problems of water seepage and torsional cracking caused by lapping of metal strips, and improves the water resistance and the lateral pressure resistance of the optical cable; under the load of 5000N/100mm, the surface of the sheath is not damaged, and the 1550nm additional attenuation of the optical fiber is less than or equal to 0.05 dB.
In conclusion, the optical fiber ribbon cable is improved, researched and developed on the pressure resistance and torsion resistance, and the water resistance of the product is improved, so that the application of the product in a multi-environment is facilitated.
While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. A pressure-resistant optical fiber ribbon cable is characterized by comprising a cable core, wherein a polyester water-blocking tape (9) is wrapped outside the cable core, a yarn-tying water-blocking tape (8) is wrapped between the cable core and the polyester water-blocking tape (9) and outside the polyester water-blocking tape (9), a metal armor layer (6) is wrapped outside the yarn-tying water-blocking tape (8) at the outer layer, and an outer sheath (1) is extruded outside the metal armor layer; the cable core comprises a reinforcing member (4) positioned in the center of the optical cable, a plurality of optical fiber units are arranged outside the reinforcing member, a filling rope (3) is arranged between every two optical fiber units, the reinforcing member, the optical fiber units and the filling ropes are twisted into the cable core, and water blocking cable paste (7) is filled in the gap of the cable core again; the optical fiber unit comprises a loose tube (11), a plurality of optical fiber ribbons (2) stacked in sequence are contained in the loose tube, and fiber paste (5) is filled in gaps between the loose tube and the optical fiber ribbons.
2. The pressure-resistant optical fiber ribbon cable according to claim 1, wherein said optical fiber ribbon is flat-shaped and comprises optical fibers (12) of different colors arranged in sequence in a transverse direction, and a flat-shaped resin fixing jacket (13) is co-extruded outside all the optical fibers; the upper surface of the resin fixing sleeve is symmetrically provided with a group of concave grooves (14), and the lower surface of the resin fixing sleeve is symmetrically provided with a group of convex grooves (15) which are butted with the concave grooves.
3. The pressure-resistant optical fiber ribbon cable according to claim 1, wherein both ends of the metal armor layer are connected by a metal armor connector buckle (10).
4. The pressure-resistant optical fiber ribbon cable according to claim 1, wherein the polyester water-blocking tape (9) comprises a polyester film on one side facing the cable core and a water-blocking layer formed by mixing water-blocking powder and a high-molecular water-absorbent resin on the other side.
5. A method for manufacturing a pressure-resistant optical fiber ribbon cable according to any one of claims 1 to 4, wherein: the method comprises the following steps:
1) and (3) coloring the optical fiber: the method comprises the steps that an optical fiber passes through a die filled with ink inside in an active pay-off mode, the color of the ink can be selected according to requirements, the optical fiber coated with the ink is cured by a UV lamp, the curing power, the take-up tension, the pay-off tension and the production speed of colored optical fiber UV lamps with different colors are required to be consistent, the curing power and the production speed of the UV lamp are required to be matched, a 2-level UV lamp curing design is adopted, when the power of the UV lamp is 6000W, the power output of the UV lamp is adjusted to be 100%, and at the moment, the production speed is not larger than 600 m/min;
2) preparing an optical fiber ribbon: optical fibers with different colors are discharged through a cylinder type active pay-off rack, the ordering and the number of the optical fibers with different colors can be placed according to requirements, the color, the ordering and the number of the optical fibers required by the optical fiber ribbon to be prepared are led into a system, the optical fibers sequentially pass through a fiber collecting wheel, an optical fiber color recognition device, a coating mold, a curing oven, the fiber collecting wheel and a take-up device through a guide wheel, then optical fiber ribbon resin passes through a pressure coating mold and is distributed on the periphery of the optical fibers with different colors, the optical fiber ribbon resin is converged into a mold size through the coating mold, then the curing and shaping are carried out through the curing oven, the optical fiber ribbon with two symmetrical concave grooves on the upper side and two symmetrical convex grooves on the lower side is formed, and the optical fiber ribbon is taken up on a turnover disc tool through the take-up device; before the optical fiber ribbon resin enters a coating die, a box body for collecting the optical fiber ribbon resin is statically placed in constant-temperature water at 48 ℃ and is subjected to bubble removal treatment; in the production process, the optical fiber color identification device can monitor the color difference of each color of the optical fiber, the number and the sequence of the colors in real time, so that the qualification rate of the finished optical fiber ribbon is improved;
3) preparation of the optical fiber unit: the prepared optical fiber ribbons are actively released by an optical fiber ribbon pay-off device and sequentially pass through a wire guide die, a wire converging die and a wire passing die respectively, the convex surfaces of the optical fiber ribbons face downwards, one optical fiber ribbon passes through a wire guide shaft of the wire guide die and then passes through the wire converging die, the convex part corresponds to the convex part of the wire converging die to form a stack, then the stacked optical fiber ribbons (2) pass through a threading die, the above operation ensures the neatness and integrity of the stacked optical fiber ribbons (2), respectively arranging fiber paste injection holes at the positions of the wire guide die and the wire converging die, injecting fiber paste among the optical fiber ribbons, wherein the injected fiber paste needs to be subjected to bubble removal treatment, the stacked optical fiber ribbons and the fiber paste enter the die core and the die sleeve through oil needles, an extruding machine extrudes a loose tube through the die core and the die sleeve, the loose tube is cooled to form optical fiber units, and the optical fiber units are orderly received on a turnover disc;
4) the optical fiber unit, the reinforcing member and the filling rope are all discharged through active paying-off, the reinforcing member is centered, the optical fiber unit and the filling rope are wound outside the reinforcing member in an SZ twisting mode, four corners of the optical fiber unit are symmetrically placed, the filling rope is located in gaps of the four corners, a cable paste filling hole is formed in a twisting table, cable core gaps are filled through cable paste through pressure filling, a yarn binding machine is synchronously designed with double ends and is respectively wound outside a cable core and a polyester water blocking tape (9) in a one-way mode, and the pitch is controlled to be 35-45 mm; the polyester water-blocking tape (9) is formed by adopting a longitudinal wrapping forming process of an airplane mold, and the polyester water-blocking tape (9) is wrapped outside the yarn-tying water-blocking tape (8);
5) the cable core wrapping the polyester water-blocking tape (9) is released through a gantry pay-off rack, the metal armor connecting buckle (10) and the metal band are released through active tape release, the metal band is stored by a metal band storage device firstly when the metal band is connected, the metal band is connected through the metal band connecting device, continuous production without shutdown is realized, when the metal band is normally produced, the size of the metal band is cut to the required width through a trimming die firstly, a cut flaw-piece is wound onto double wheels at two sides of the trimming device through a motor, the cut metal band is straightened and positioned through a metal band threading die, the straightened metal band, the metal armor connecting buckle (10) and the cable core wrapping the polyester water-blocking tape (9) enter corresponding positions of a metal band forming die, the metal band is longitudinally wrapped into a round shape from a straight line shape and is connected through the metal armor connecting buckle (10), and the metal armor layer (6) wrapping the cable core is subjected to size stretching through a metal band sizing die, then, the outer sheath is extruded through a mold core and a mold sleeve in the head of the extruding machine and through a sheath material, and finally the formed cable is collected on a disc after cooling.
6. The method for preparing a pressure-resistant optical fiber ribbon cable according to claim 5, wherein the optical fiber color recognition device comprises three functions of extraction, recognition and early warning;
the device for extracting the color of the optical fiber is a color collector, the color collector is positioned between the fiber collecting wheel and the coating die and used for extracting the color of various optical fibers, the color collector consists of a light source device and an image extracting and transmitting device, and the front, the back, the left, the right, the upper and the lower surfaces of the color collector consist of light-isolating glass and black light-isolating films; the light source device of the color collector is connected with the equipment host, after the light source is selected according to requirements on the host, the light source device can select a corresponding light source to irradiate after the host is started, the light source device is respectively provided with light source lamps at four corners of the color collector, and the light source lamps contain 5 light sources for selection respectively: the LED lamp comprises a D65 light source, a TL84/P15, an A light source, an H light source and a UV light source, which can be selected and switched according to requirements; the image extraction is provided by a 360-degree symmetrical CCD camera, and the CCD camera adopts spherical collection aiming at the round optical fiber, so that the color collection accuracy is improved; respectively transmitting the acquired optical fiber colors and the sequence to an equipment host through a transmission device; the transmission device of the color collector is an image editor and a data line;
the device host is used for identifying the color of the optical fiber and comprises light source selection, the color of the optical fiber and sequencing functions, the host can be started after the functions are set, the device host simultaneously comprises color comparison and early warning functions, images provided by 360-degree symmetrical CCD cameras are subjected to bidirectional comparison through a program, and if color errors and color overruns occur, the device host transmits an early warning signal to an early warning lamp and slowly stops the device;
the device for optical fiber color early warning is an early warning lamp which has the functions of red light flickering and warning rumbling, and acousto-optic early warning can be carried out through early warning signals.
7. The preparation method of the pressure-resistant optical fiber ribbon cable according to claim 5, wherein the polyester water-blocking tape (9) has two surfaces, one surface is a polyester film, and the polyester film is subjected to air suction and impurity filtration in the thermoplastic molding process; the other side is a water-resistant layer formed by mixing water-resistant powder and high-molecular water-absorbent resin, and the two sides are uniformly baked at high temperature through an anhydrous adhesive, pulled by a die and cooled for forming; the polyester film wraps the cable core, and the water-resistant layer faces the metal armor layer (6).
8. The method for preparing a pressure-resistant optical fiber ribbon cable according to claim 5, wherein the wire guide module in step 3) is in a patch board mode, a plurality of wire guide shafts are provided, and the distance between every two wire guide shafts is the thickness H +0.1mm of the optical fiber ribbon and the width L +1 mm; porcelain treatment is carried out on the surface of the lead shaft, and bearings are designed at two ends of the lead shaft;
the wire converging die is of a plug board die, is in a cuboid shape and has the size: the thickness H +0.1mm and the width L +0.3mm of the optical fiber ribbon are realized, and the positioning and accurate positioning of the optical fiber ribbon are realized through a converging module;
the threading die is of a cylindrical structure, the center of the threading die is a rectangular through die, and the threading die is used for positioning a plurality of optical fiber ribbons (2) stacked in sequence and preventing dislocation and overturning in the production process.
9. The method for preparing the pressure-resistant optical fiber ribbon cable according to claim 5, wherein in the step 5), an open groove is formed in the center of the metal ribbon threading die, the metal ribbon threading die is divided into cuboids with the same upper and lower parts, the height of the groove is H +0.1mm, and the depth of the groove is 2/3 of the depth of a single cuboid; the metal strip threading die can be used for adjusting the height and the width and correcting and positioning the metal strip;
the metal strip forming die is of a cylindrical structure, the center of the metal strip forming die is a circular through hole, an arc I-shaped through hole is formed above the circular through hole, circular-arc metal strip forming holes are formed in grooves in two ends of the arc I-shaped through hole, and two ends of each circular-arc metal strip forming hole are inserted into 4/5 positions of the corresponding groove.
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| CN118655668A (en) * | 2024-08-20 | 2024-09-17 | 江苏亨通光电股份有限公司 | Optical fiber ribbon cable |
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| CN114296194B (en) | 2024-08-02 |
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