Multi-core illumination optical fiber, stranding device and use method of multi-core illumination optical fiber

Abstract

The invention discloses a multi-core illumination optical fiber, a stranding device and a use method thereof, the multi-core illumination optical fiber comprises a plurality of optical fiber core groups, the plurality of optical fiber core groups are arranged in a manner that a plurality of outer-layer optical fiber core bodies are spirally wound on a plurality of inner-layer optical fiber core bodies, and the plurality of optical fiber core groups tightly wrap a reinforcing tube arranged in the optical fiber core groups in a reciprocating spiral stranding manner. According to the invention, the plurality of optical fiber core bodies are spirally twisted together to form the optical fiber core group, and the reinforcing tubes are additionally arranged in the plurality of optical fiber core groups made in a reciprocating spiral twisting mode, so that the tensile strength of the multi-core illumination optical fiber can be improved, and the service life of the optical fiber is prolonged; the reciprocating stranding mechanism is used for preventing the fiber core body from being sprained and damaged in the stranding process, the positioning frame is additionally arranged in the stranding structure, so that the positioning frame can position and fix the fiber core group in the reciprocating stranding process, the fiber core group is tightly attached to the outer wall of the reinforcing tube, the traditional wire binding operation is avoided, and the processing cost is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting optical fiber applications, and particularly to a multi-core lighting optical fiber, a stranding device and a using method thereof. Background Art

[0002] In the field of lighting, fiber optic lighting has been widely used due to its unique advantages. It can achieve long-distance light transmission, separate the light source from the lighting area, and meet the needs of some special places; at the same time, it has good flexibility, can be bent and shaped at will, and also has high safety, such as no electric shock danger and no heat generation.

[0003] However, the existing single-core lighting optical fiber has obvious deficiencies. Its luminous intensity and uniformity are limited. In scenarios with high requirements for lighting effects such as large shopping malls, theaters, and squares, the single-core lighting optical fiber is difficult to create an ideal lighting atmosphere and cannot meet diverse lighting needs.

[0004] For multi-core lighting optical fibers, there are many challenges during the stranding process. It is easy for multiple optical fibers to be entangled and misaligned. This not only causes damage to the optical fibers, affects the transmission performance of the optical fibers, reduces the light transmission efficiency, but also shortens the service life of the optical fibers. Traditional co-directional spiral stranding will increase the torque of the optical fiber core body, and when a certain torque is reached, it will cause damage to the optical fiber core body. At the same time, reciprocating spiral stranding requires an additional tying step, thus increasing the input of production costs.

[0005] Therefore, the present invention proposes a multi-core lighting optical fiber, a stranding device and a using method thereof. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a multi-core lighting optical fiber to improve the luminous intensity and uniformity of the optical fiber; at the same time, to provide a stranding device and a using method for the multi-core lighting optical fiber to solve the problems of easy damage to the optical fiber, low stranding efficiency and quality during the existing stranding process.

[0007] To solve the above technical problem, a technical solution adopted by the present invention is: to provide a multi-core lighting optical fiber, including a plurality of optical fiber core groups, and in each of the plurality of optical fiber core groups, a plurality of outer-layer optical fiber cores are helically wound around a plurality of inner-layer optical fiber cores. The plurality of optical fiber core groups are tightly wrapped around a reinforcing tube arranged inside in a reciprocating spiral stranding manner to avoid torque accumulation and enhance the tensile strength of the lighting optical fiber. At the same time, a protective sleeve is injection-molded outside to protect the optical fiber core groups.

[0008] Through the above technical solution, multiple optical fiber cores are stranded and fixed in a spiral winding manner, and the formed optical fiber core group after stranding is then arranged on the outer wall of the strengthening tube in a reciprocating spiral stranding manner, so as to improve the tensile strength of the lighting optical fiber. At the same time, the protective sleeve arranged on its outer wall can reduce the damage to the optical fiber core group, thereby prolonging the service life of the multi-core lighting optical fiber.

[0009] A multi-core lighting optical fiber stranding device is also provided, including a positioning base plate for coaxial installation and fixation of multiple mechanisms; A wire feeding mechanism detachably installed on the upper surface of the positioning base plate near one end to realize stable and continuous wire feeding of several optical fiber core groups; An arrangement rack installed in the middle of the wire feeding mechanism through multiple connecting rods for neatly arranging and distributing several optical fiber core groups; Multiple tensioning components bolted to one end of the arrangement rack in the circumferential direction for tensioning adjustment of the optical fiber core group during the stranding process; A stranding mechanism bolted to the upper surface of the positioning base plate near the middle to realize reciprocating stranding of several optical fiber core groups on the outer wall of the strengthening tube; An injection molding machine bolted to the upper surface of the positioning base plate for injecting a protective sleeve on the outer wall of the stranded lighting optical fiber; A traction mechanism bolted to the upper surface of the positioning base plate near the other end for traction and winding of the processed lighting optical fiber; Among them, several of the optical fiber core groups sequentially pass through the arrangement rack, the stranding mechanism, the injection molding machine, and the traction mechanism; The strengthening tube sequentially passes through the wire feeding mechanism, the arrangement rack, the stranding mechanism, the injection molding machine, and the traction mechanism, and its two ends are respectively connected with a pay-off machine and a take-up machine.

[0010] The present invention is further arranged as: the wire feeding mechanism includes an installation rack bolted to the top of the positioning base plate through a fixed seat. A plurality of clamping racks are evenly and fixedly connected in the circumferential direction on one side of the installation rack. The end faces of the plurality of clamping racks are all rotatably connected with fiber core reels. One end of the rotating shafts arranged in the plurality of fiber core reels is fixedly connected with a driven gear, and the other end is snap-connected with a limiting ring; The outer walls of the plurality of driven gears are meshed and connected with a driving gear ring. The driving gear ring is meshed and connected with a driving gear sleeved on the output shaft of the wire feeding motor, and the wire feeding motor is bolted to the other side of the installation rack near the bottom position.

[0011] Through the above technical solution, the wire pay-off motor is started, and its output shaft drives the driving gear on the end face to rotate, which drives the meshing-connected driving gear ring to rotate, thereby driving the rotation of a plurality of meshing-connected driven gears, and further enabling the fiber core reel to rotate on the card holder, so as to realize stable wire pay-off operation during the stranding process. The limiting ring can limit and fix the position of the fiber core reel installed on the card holder to prevent it from falling during use.

[0012] The present invention is further configured as follows: the driving gear ring is rotatably connected to a position near the edge of one side of the mounting frame, and the tooth blocks arranged on its surface are integrally L-shaped. The rotating gear ring is respectively meshed with the driving gear and the driven gear through the tooth blocks.

[0013] Through the above technical solution, when the driving gear ring rotates, it can rotate stably on the mounting frame, and by using the L-shaped arrangement of the tooth blocks, the driving gears and the driven gears on both sides can be stably meshed with it.

[0014] The present invention is further configured as follows: the arranging frame includes a plurality of guide tubes arranged at equal intervals in the circumferential direction, and a lead-in ring plate and a lead-out ring plate respectively installed at both ends of the guide tubes. The lead-in ring plate is fixedly connected to the middle position of the mounting frame through a plurality of connecting rods; Among them, the plurality of guide tubes are arranged in a converging manner from the lead-in ring plate towards the lead-out ring plate. The lead-in ring plate and the lead-out ring plate are respectively evenly provided with a plurality of lead-in holes and lead-out holes at equal intervals in the circumferential direction, and both ends of the plurality of guide tubes are respectively communicated with the lead-in holes and the lead-out holes; Embedded sleeves are embedded in the inner walls of the plurality of lead-in holes, and a plurality of weight-reducing holes are provided on the outer walls of the plurality of guide tubes, and the whole is in a hollow setting.

[0015] Through the above technical solution, it is convenient to install the whole arranging frame in the middle position of the mounting frame by using a plurality of connecting rods, so that they are coaxially arranged; So that multiple groups of optical fiber core groups can be gradually and intactly converged under the action of the guide tubes, so that the diameter surrounded by the multiple groups of optical fiber core groups gradually approaches the stranding disc, which is convenient for stranding and conveying; The embedded sleeves arranged inside the lead-in holes can protect the outer wall of the incoming optical fiber core groups to prevent friction damage during the movement. At the same time, the hollow guide tubes not only play a guiding role but also reduce the overall weight, thereby reducing the cost investment.

[0016] The present invention is further configured as follows: the tensioning assembly includes a frame body bolted to a position near the edge of one side of the lead-in ring plate, facing the wire pay-off mechanism, and the frame body is located on both sides of the lead-in hole; On both sides of the frame body, movable grooves are symmetrically arranged near the end face positions. Slide rods are installed in the two movable grooves from top to bottom and fixed with nuts. The outer walls of the two slide rods are slidably connected with a slide plate. A tension pulley is bolted to the bottom of the slide plate. Two tension springs are tightly pressed against the top of the slide plate, and the two tension springs are respectively sleeved outside the two slide rods. At the same time, the other ends of the two tension springs are tightly pressed against the inner top of the movable grooves.

[0017] Through the above technical solution, the tension pulley in the tension assembly is squeezed by the fiber core group pulled by positive and reverse twisting, so that the tension pulley drives the slide plate to slide on the slide rod and squeezes the tension spring at the top. The reset elasticity of the tension spring enables it to drive the tension pulley to perform dynamic tension adjustment on the fiber core group to ensure the stable movement of the fiber core group.

[0018] The present invention is further configured as: the twisting mechanism includes a connecting plate bolted to the positioning bottom plate through a plurality of angle blocks. Three vertical plates are equidistantly and fixedly connected to the top of the connecting plate; Toothed wheels are rotatably connected to the side walls of the three vertical plates near the bottom positions. One of the toothed wheels is arranged opposite to the other two toothed wheels. Toothed belts are meshed and connected to the outer walls of the three toothed wheels. One end of the inner wall of one of the toothed belts away from the toothed wheel is meshed and connected to a positioning disk. The other two ends of the inner walls of the toothed belts away from the toothed wheels are meshed and connected to twisting disks. Through holes are provided in the three vertical plates near the bottom positions, and the outer wall of the rotating shaft is interference-fitted to the three toothed wheels. One end of the rotating shaft is fixedly connected to the output shaft of a twisting motor installed on the side wall of one of the vertical plates; The two twisting disks and one positioning disk are respectively rotatably connected to the three vertical plates near the top positions. A plurality of limiting holes are evenly arranged in the circumferential direction on the two twisting disks. A positioning frame is arranged on the inner wall of the positioning disk, and arc-shaped grooves equal to the fiber core group are arranged on the inner wall of the positioning frame.

[0019] Through the above technical solution, the three vertical plates can be used to equidistantly separate the twisting disks and the positioning disk, and a certain relative distance is left during the twisting process to ensure the stable feeding effect of the fiber core group; Start the twisting motor to drive the rotating shaft at the end face of the output shaft to rotate, thereby driving the three toothed wheels to rotate on the vertical plates. Then, using the transmission of the toothed belts, the two twisting disks and one positioning disk are slowly rotated, so that multiple groups of fiber core groups are spirally wound in an S shape on the strengthening tube. At the same time, the positioning frame built in the positioning disk can tightly fit the fiber core group with a certain plastic deformation on the outer wall of the strengthening tube; When a certain stranding pitch is reached, the stranding motor reverses at this time, causing the two stranding discs and a positioning disc to rotate slowly in the opposite direction, so that multiple groups of optical fiber core groups are wound around the strengthening tube in a Z-direction spiral. At the same time, the positioning frame built into the positioning disc can closely fit the optical fiber core groups with a certain plastic deformation on the outer wall of the strengthening tube, thereby completing the stranding operation of the multi-core optical fiber; The multiple limiting holes provided can evenly distribute multiple groups of optical fiber core groups in a circumferential manner, and can ensure their stability with each other during stranding, avoiding extrusion damage. At the same time, an arc-shaped groove is provided on the inner wall of the positioning frame to press the multiple groups of optical fiber core groups stranded on the strengthening tube, so that they plastically fit on the outer wall of the strengthening tube.

[0020] The present invention is further configured as: the traction mechanism includes a cooling cavity bolted to the positioning base plate through a support frame and a cavity cover plate bolted to it after covering; At the centers of both ends of the cooling cavity, traction perforations are provided. At a position close to one end of the inner wall of the cooling cavity, a plurality of traction rollers are evenly rotatably connected, and the end faces of the traction rollers extend out of the outer wall of the cooling cavity. Traction wheels are sleeved at the middle positions of the plurality of traction rollers, and driven wheels are sleeved at the end faces of the plurality of traction rollers. A traction motor is bolted to the bottom of the cooling cavity, and a driving wheel is sleeved at the output end of the traction motor. The driving wheel and the plurality of driven wheels are sequentially sleeved with synchronous belts to achieve synchronous transmission; At the top of the cavity cover plate and directly above the plurality of traction rollers, two screw rods are provided and are limited and fixed by external nuts. The bottoms of the two screw rods are fixedly connected with a U-shaped frame. A plurality of auxiliary wheels are evenly rotatably connected to the inner wall of the U-shaped frame, and the auxiliary wheels respectively correspond to the plurality of traction wheels one by one. Compression springs are sleeved on the outer walls of the two screw rods, and both ends of the two compression springs respectively abut against the cavity cover plate and the U-shaped frame.

[0021] Through the above technical solution, the cooling cavity can store the internal cooling medium, and the cavity cover plate can seal its interior and fix the auxiliary wheels at the same time; Start the traction motor to drive the driving wheel on its output shaft to rotate. Use a plurality of synchronous belts to make the plurality of driven wheels connected in transmission rotate, thereby driving the traction wheels on the internal traction rollers to rotate. Then, cooperate with the compression springs to press the auxiliary wheels pressing on the multi-core lighting optical fiber to pull the multi-core lighting optical fiber with a protective sleeve injection molded; The two screw rods passing through the cavity cover plate can cause the auxiliary wheels to slide on the cavity cover plate through the screw rods with the U-shaped frame when the multi-core lighting optical fiber enters from the bottom and is squeezed, and compress the compression springs. And by using the reset elasticity of the stepping spring, the auxiliary wheels can cooperate with the traction wheels to press the multi-core lighting optical fiber, facilitating traction and pulling.

[0022] The present invention is further configured such that: a drain pipe is fixedly connected to the rear wall of the cooling cavity near the horizontal plane at the bottom of the traction perforation, and a water inlet pipe is fixedly connected to the top of the cavity cover near one end.

[0023] Through the above technical solution, it is convenient to use the traction perforation to guide the multi-core optical fiber after stranding and injection molding, so that it can be quickly cooled by the internal cooling medium when passing through the inside of the cooling cavity, thereby fixing the stranded multi-core optical fiber. Moreover, the combined use of the water inlet pipe and the drain pipe can ensure the circulation of the internal cooling medium.

[0024] At the same time, a method for using a multi-core lighting optical fiber stranding device is also provided, including the following steps: S1. First, a plurality of groups of optical fiber cores and the strengthening tube are simultaneously led out from the wire pay-off mechanism towards the traction mechanism, and sequentially pass through the arranging rack, the stranding mechanism, the injection molding machine and the traction mechanism, and are connected to an external take-up machine; S2. Then, a cooling medium is injected into the cooling cavity through the water inlet pipe and the communication cycle is realized by using the drain pipe to quickly cool the injection-molded protective sleeve; S3. Then, when the external control system receives a start command, initialization signals are simultaneously sent to the driving mechanisms of each station, specifically including: S31. A signal is sent to the traction motor in the traction mechanism to drive the driving wheel on the output shaft to rotate, and a plurality of driven wheels connected by transmission are rotated by using a plurality of synchronous belts, thereby driving the traction wheel on the internal traction roller to rotate. Then, the auxiliary wheel pressed on the multi-core lighting optical fiber is used in cooperation with the compression spring to traction and pull the multi-core lighting optical fiber with an injection-molded protective sleeve; S32. A signal is sent to the injection molding machine, and the internal heating structure heats the raw material of the protective sleeve to form a fluid that coats the surface of the optical fiber core group, and after being quickly cooled inside the cooling cavity, the protective sleeve fixes the stranded multi-core optical fiber inside; S33. A signal is sent to the stranding motor in the stranding mechanism to drive the rotating shaft at the end face of the output shaft to rotate, thereby driving three toothed wheels to rotate on the vertical plate. Then, through the transmission of the toothed belt, two stranding disks and a positioning disk rotate slowly, so that a plurality of groups of optical fiber cores are spirally wound in an S shape on the strengthening tube. At the same time, the positioning frame built in the positioning disk can closely fit the optical fiber cores with a certain plastic deformation on the outer wall of the strengthening tube; When reaching a certain stranding pitch, the stranding motor reverses at this time, causing the two stranding discs and a positioning disc to rotate slowly in the opposite direction, so that multiple groups of optical fiber core groups are helically wound in the Z direction on the strengthening tube. At the same time, the positioning frame built in the positioning disc can closely fit the optical fiber core groups with a certain plastic deformation on the outer wall of the strengthening tube, thereby completing the stranding operation of the multi-core optical fiber; Meanwhile, the tensioning wheel in the tensioning assembly is squeezed by the optical fiber core group pulled by the forward and reverse stranding, so that the tensioning wheel drives the slide plate to slide on the slide rod and squeezes the tensioning spring at the top. And the reset elasticity of the tensioning spring drives the tensioning wheel to perform dynamic tensioning adjustment on the optical fiber core group to ensure the stable movement of the optical fiber core group; S34. Send a signal to the pay-off motor in the pay-off mechanism to make its output shaft drive the driving gear on the end face to rotate, drive the meshing-connected driving gear ring to rotate, and thus drive the rotation of multiple meshing-connected driven gears, so that the fiber core reel rotates on the rack and realizes stable pay-off operation during the stranding process; S35. Send signals to the pay-off machine and the take-up machine at both ends of the strengthening tube to realize the pay-off of the strengthening tube and the take-up operation after forming the multi-core lighting optical fiber.

[0025] The beneficial effects of the present invention are as follows: 1. A multi-core lighting optical fiber, a stranding device and a using method thereof proposed by the present invention form an optical fiber core group by helically stranding multiple optical fiber cores together, and add a strengthening tube inside multiple optical fiber core groups made in the form of reciprocating spiral stranding, so as to improve the tensile strength of the multi-core lighting optical fiber and extend the service life of the optical fiber; 2. A multi-core lighting optical fiber, a stranding device and a using method thereof proposed by the present invention fix the rotating pay-off mechanism in the traditional stranding process, avoid high energy consumption, and use the reciprocating stranding mechanism to avoid spraining and damaging the optical fiber cores during the stranding process; 3. A multi-core lighting optical fiber, a stranding device and a using method thereof proposed by the present invention add a positioning frame in the stranding structure, so that it can position and fix the optical fiber core group during the reciprocating stranding process, make it closely fit the outer wall of the strengthening tube, avoid the traditional tying operation, and thus reduce the processing cost. Description of the Drawings

[0026] Figure 1 is an exploded view of the multi-core lighting optical fiber of the present invention; Figure 2 is the first structural diagram of the multi-core lighting optical fiber stranding device of the present invention; Figure 3 is the second structural diagram of the multi-core lighting optical fiber stranding device of the present invention; Figure 4Front view of the multi-core lighting optical fiber stranding device of the present invention; Figure 5 First structural diagram of the wire feeding mechanism in the multi-core lighting optical fiber stranding device of the present invention; Figure 6 Second structural diagram of the wire feeding mechanism in the multi-core lighting optical fiber stranding device of the present invention; Figure 7 First connection structural diagram of the arrangement rack and the tensioning assembly in the multi-core lighting optical fiber stranding device of the present invention; Figure 8 Second connection structural diagram of the arrangement rack and the tensioning assembly in the multi-core lighting optical fiber stranding device of the present invention; Figure 9 Structural diagram of the arrangement rack in the multi-core lighting optical fiber stranding device of the present invention; Figure 10 Exploded view of the arrangement rack in the multi-core lighting optical fiber stranding device of the present invention; Figure 11 Structural diagram of the tensioning assembly in the multi-core lighting optical fiber stranding device of the present invention; Figure 12 First structural diagram of the stranding mechanism in the multi-core lighting optical fiber stranding device of the present invention; Figure 13 Second structural diagram of the stranding mechanism in the multi-core lighting optical fiber stranding device of the present invention; Figure 14 First structural diagram of the traction mechanism in the multi-core lighting optical fiber stranding device of the present invention; Figure 15 Second structural diagram of the traction mechanism in the multi-core lighting optical fiber stranding device of the present invention.

[0027] In the figure: 1. Optical fiber core group; 2. Reinforcing tube; 3. Protective sleeve; 4. Wire feeding mechanism; 41. Fixed seat; 42. Mounting frame; 43. Clamping frame; 44. Core reel; 45. Driven gear; 46. Limiting ring; 47. Driving gear ring; 48. Wire feeding motor; 49. Driving gear; 5. Arrangement rack; 51. Lead wire ring plate; 511. Lead wire hole; 512. Embedded sleeve; 52. Outlet wire ring plate; 521. Outlet wire hole; 53. Guide tube; 531. Weight reduction hole; 6. Tensioning assembly; 61. Frame body; 62. Moving groove; 63. Slide bar; 64. Slide plate; 65. Tensioning wheel; 66. Tensioning spring; 7. Stranding mechanism; 71. Angle block; 72. Connecting plate; 73. Vertical plate; 74. Tooth-shaped wheel; 75. Tooth-shaped belt; 76. Stranding disc; 761. Limiting hole; 77. Positioning disc; 771. Positioning frame; 78. Rotating shaft; 79. Stranding motor; 8. Injection molding machine; 9. Traction mechanism; 91. Cooling cavity; 911. Support frame; 912. Traction perforation; 913. Drain pipe; 914. Traction roller; 915. Traction wheel; 916. Driven wheel; 917. Synchronous belt; 918. Traction motor; 919. Driving wheel; 92. Cavity cover plate; 921. Water inlet pipe; 922. Screw; 923. U-shaped frame; 924. Compression spring; 925. Auxiliary wheel; 10. Positioning bottom plate. Specific embodiments

[0028] The following describes in detail the preferred embodiments of the present invention with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0029] As Figure 1 shown, a multi-core lighting optical fiber includes a plurality of optical fiber core groups 1. Each of the plurality of optical fiber core groups 1 is formed by a plurality of outer-layer optical fiber cores helically wound around a plurality of inner-layer optical fiber cores. Stranding and fixing the plurality of optical fiber cores in a helical winding manner can improve the overall strength of the optical fiber core group 1 and facilitate subsequent stranding operations; The plurality of optical fiber core groups 1 tightly wrap a reinforcing tube 2 disposed therein in a reciprocating helical stranding form to avoid torque accumulation and enhance the tensile strength of the lighting optical fiber. At the same time, a protective sleeve 3 is injection-molded on the outside. The protective sleeve 3 provided on its outer wall can reduce damage to the optical fiber core group 1, thereby extending the service life of the multi-core lighting optical fiber.

[0030] As Figures 2 - 6As shown in the figure, a multi-core lighting optical fiber stranding device includes a positioning base plate 10 for the quick installation and fixation of multiple coaxial mechanisms. A wire pay-off mechanism 4 is detachably installed on the upper surface of the positioning base plate 10 near one end to achieve the stable and continuous wire pay-off of several optical fiber core groups 1. The wire pay-off mechanism 4 includes a mounting frame 42 bolted to the top of the positioning base plate 10 through a fixing seat 41. A plurality of clamping frames 43 are fixedly connected evenly in the circumferential direction on one side of the mounting frame 42. The end faces of the plurality of clamping frames 43 are rotatably connected with core reels 44. One end of the rotating shafts provided in the plurality of core reels 44 is fixedly connected with a driven gear 45, and the other end is snap-connected with a limiting ring 46. The limiting ring 46 can be used to limit and fix the position of the core reel 44 installed on the clamping frame 43 to prevent it from falling during use. The outer walls of the plurality of driven gears 45 are meshed with a driving gear ring 47. The driving gear ring 47 is rotatably connected to one side of the mounting frame 42 near the edge, and the tooth blocks provided on its surface are integrally arranged in an L shape. The rotating gear ring 47 is meshed with the driving gear 49 and the driven gear 45 respectively through the tooth blocks, so that when the driving gear ring 47 rotates, it can rotate stably on the mounting frame 42, and by using the L-shaped arrangement of the tooth blocks, the driving gear 49 and the driven gear 45 on both sides can be stably meshed with it. The driving gear ring 47 is meshed with the driving gear 49 sleeved on the output shaft of the pay-off motor 48, and the pay-off motor 48 is bolted to the position near the bottom on the other side of the mounting frame 42. The pay-off motor 48 is started, and its output shaft drives the driving gear 49 on the end face to rotate, which drives the meshed driving gear ring 47 to rotate, thereby driving the rotation of the plurality of meshed driven gears 45, and further enabling the core reel 44 to rotate on the clamping frame 43, so as to achieve stable wire pay-off operation during the stranding process.

[0031] As Figure 4 and Figures 7 - 10 shown in the figure, a layout frame 5 installed in the middle of the wire pay-off mechanism 4 through a plurality of connecting rods is used for the neat arrangement and distribution of several optical fiber core groups 1. The layout frame 5 includes a plurality of guide tubes 53 arranged equidistantly in the circumferential direction and a lead ring plate 51 and an outlet ring plate 52 respectively installed at both ends of the guide tubes 53. The lead ring plate 51 is fixedly connected to the middle position of the mounting frame 42 through a plurality of connecting rods, which is convenient to install the entire layout frame 5 in the middle position of the mounting frame 42 by using a plurality of connecting rods, so that it is coaxially arranged; Among them, the plurality of guide tubes 53 are arranged in a converging manner from the lead ring plate 51 towards the outlet ring plate 52. The lead ring plate 51 and the outlet ring plate 52 are respectively evenly and equidistantly provided with a plurality of lead holes 511 and outlet holes 521 in the circumferential direction, and both ends of the plurality of guide tubes 53 are respectively communicated with the lead holes 511 and the outlet holes 521, so that multiple groups of optical fiber core groups 1 can be gradually and intactly converged under the action of the guide tubes 53, so that the diameters surrounded by multiple groups of optical fiber core groups 1 are gradually close to the stranding disc 76, which is convenient for stranding and conveying; The inner walls of multiple lead holes 511 are all embedded with embedding sleeves 512. Multiple weight-reducing holes 531 are provided on the outer walls of multiple guide tubes 53, and the overall is arranged in a hollow manner. The embedding sleeves 512 arranged inside the lead holes 511 can protect the outer walls of the entering optical fiber core groups 1, preventing friction damage during movement. At the same time, the hollow guide tubes 53 not only play a guiding role but also reduce the overall weight, thereby reducing the cost investment.

[0032] As Figure 7 and Figure 11 shown, multiple tensioning components 6 are bolted to one end of the arrangement frame 5 in the circumferential direction to perform tensioning adjustment on the optical fiber core groups 1 during the stranding process. The tensioning components 6 include a frame body 61 bolted to one side of the lead ring plate 51 near the edge, and facing the wire pay-off mechanism 4. At the same time, the frame body 61 is located on both sides of the lead hole 511; Symmetrically arranged activity slots 62 are provided at positions near the end faces on both sides of the frame body 61. Slide rods 63 are installed in the two activity slots 62 from top to bottom and fixed with nuts. A slide plate 64 is slidably connected to the outer walls of the two slide rods 63. A tensioning wheel 65 is bolted to the bottom of the slide plate 64. Two tensioning springs 66 are tightly pressed against the top of the slide plate 64, and the two tensioning springs 66 are respectively sleeved outside the two slide rods 63. At the same time, the other ends of the two tensioning springs 66 are tightly pressed against the inner top of the activity slots 62. The tensioning wheel 65 provided inside the tensioning component 6 is squeezed by the optical fiber core groups 1 pulled by positive and reverse stranding, so that the tensioning wheel 65 drives the slide plate 64 to slide on the slide rods 63 and squeezes the tensioning springs 66 at the top. The reset elasticity of the tensioning springs 66 enables them to drive the tensioning wheel 65 to perform dynamic tensioning adjustment on the optical fiber core groups 1 to ensure the stable movement of the optical fiber core groups 1.

[0033] As Figure 4 、 Figure 12 and Figure 13 shown, a stranding mechanism 7 is bolted to the upper surface of the positioning bottom plate 10 near the middle to realize the reciprocating stranding of several optical fiber core groups 1 on the outer wall of the strengthening tube 2. The stranding mechanism 7 includes a connecting plate 72 bolted to the positioning bottom plate 10 through multiple angle blocks 71. Three vertical plates 73 are equidistantly and fixedly connected to the top of the connecting plate 72. The three vertical plates 73 can equidistantly separate the stranding disc 76 and the positioning disc 77, and leave a certain relative distance during the stranding process to ensure the stable feeding effect of the optical fiber core groups 1; At the position near the bottom of the side walls of the three vertical plates 73, there are toothed wheels 74 rotatably connected. One of the toothed wheels 74 is disposed opposite to the other two toothed wheels 74. The outer walls of the three toothed wheels 74 are all engaged with a toothed belt 75. At one end of the inner wall of one of the toothed belts 75 away from the toothed wheel 74, there is a positioning disk 77 engaged. At one end of the inner walls of the other two toothed belts 75 away from the toothed wheel 74, there are stranded disks 76 engaged. At the position near the bottom of the three vertical plates 73, there is a rotating shaft 78 passing through. And the outer wall of the rotating shaft 78 is interference-connected to the three toothed wheels 74. One end of the rotating shaft 78 is fixedly connected to the output shaft of a stranded motor 79 installed on the side wall of one of the vertical plates 73. Start the stranded motor 79 to drive the rotating shaft 78 at the end face of the output shaft to rotate, thereby driving the three toothed wheels 74 to rotate on the vertical plates 73. Then, by the transmission of the toothed belt 75, the two stranded disks 76 and one positioning disk 77 are made to rotate slowly, so that multiple groups of optical fiber core groups 1 are spirally wound in an S direction on the strengthening tube 2. At the same time, with the positioning frame 771 built in the positioning disk 77, the optical fiber core groups 1 with a certain plastic deformation can be closely attached to the outer wall of the strengthening tube 2; When reaching a certain stranding pitch, at this time, the stranded motor 79 rotates in reverse, so that the two stranded disks 76 and one positioning disk 77 rotate slowly in the reverse direction, so that multiple groups of optical fiber core groups 1 are spirally wound in a Z direction on the strengthening tube 2. At the same time, with the positioning frame 771 built in the positioning disk 77, the optical fiber core groups 1 with a certain plastic deformation can be closely attached to the outer wall of the strengthening tube 2, thereby completing the stranding operation of the multi-core optical fiber; The two stranded disks 76 and one positioning disk 77 are respectively rotatably connected to the position near the top of the three vertical plates 73. The two stranded disks 76 are evenly provided with a plurality of limiting holes 761 along the circumferential direction. The inner wall of the positioning disk 77 is provided with a positioning frame 771, and the inner wall of the positioning frame 771 is provided with arc-shaped grooves equal to the optical fiber core groups 1. By using the plurality of limiting holes 761 provided, the multiple groups of optical fiber core groups 1 can be evenly distributed in a circumferential direction at equal distances, and the stability of each other can be ensured during stranding to avoid being damaged by extrusion. At the same time, the arc-shaped grooves provided on the inner wall of the positioning frame 771 can press the multiple groups of optical fiber core groups 1 stranded on the strengthening tube 2 correspondingly, so that they are plastically attached to the outer wall of the strengthening tube 2.

[0034] As Figures 2 - 4 shown, an injection molding machine 8 bolted to the upper surface of the positioning bottom plate 10 is used to inject a protective sleeve 3 on the outer wall of the stranded lighting optical fiber. The molten fluid is sprayed from the nozzle inside the injection molding machine 8 onto the surface of the optical fiber core group 1 to form the protective sleeve 3. This is a conventional technical means in the field and will not be elaborated here.

[0035] As Figure 4 、 Figure 14 and Figure 15As shown, the bolt is connected to the traction mechanism 9 near the other end on the upper surface of the positioning base plate 10 to traction and wind up the processed lighting optical fiber. The traction mechanism 9 includes a cooling cavity 91 bolted to the positioning base plate 10 through a support frame 911 and a cavity cover plate 92 bolted after covering it. The cooling cavity 91 can store the internal cooling medium, and the cavity cover plate 92 can seal its interior and fix the auxiliary wheel 925 at the same time; Traction perforations 912 are provided at the centers of both ends of the cooling cavity 91. A plurality of traction rollers 914 are evenly rotatably connected to the inner wall of the cooling cavity 91 near one end, and the end faces of the traction rollers 914 extend out of the outer wall of the cooling cavity 91. Traction wheels 915 are sleeved at the middle positions of the plurality of traction rollers 914, and driven wheels 916 are sleeved at the end faces of the plurality of traction rollers 914. A traction motor 918 is bolted to the bottom of the cooling cavity 91. A driving wheel 919 is sleeved at the output end of the traction motor 918. The driving wheel 919 and the plurality of driven wheels 916 are sequentially sleeved with synchronous belts 917 to achieve synchronous transmission. The traction motor 918 is started to drive the driving wheel 919 on its output shaft to rotate. The plurality of driven wheels 916 connected by transmission are rotated by means of the plurality of synchronous belts 917, so as to drive the traction wheels 915 on the internal traction rollers 914 to rotate. Then, in cooperation with the auxiliary wheel 925 pressed on the multi-core lighting optical fiber by the compression spring 924, the multi-core lighting optical fiber with the protective sleeve 3 injection-molded is tractioned and pulled; Two screw rods 922 are penetrated through the top of the cavity cover plate 92 and located directly above the plurality of traction rollers 914, and are limited and fixed by external nuts. The bottoms of the two screw rods 922 are fixedly connected with a U-shaped frame 923. A plurality of auxiliary wheels 925 are evenly rotatably connected to the inner wall of the U-shaped frame 923, and the auxiliary wheels 925 correspond to the plurality of traction wheels 915 one by one. Compression springs 924 are sleeved on the outer walls of the two screw rods 922, and the two ends of the two compression springs 924 are respectively abutted against the cavity cover plate 92 and the U-shaped frame 923. When the multi-core lighting optical fiber enters from the bottom and the auxiliary wheel 925 is affected, the two screw rods 922 penetrating through the cavity cover plate 92 can make the U-shaped frame 923 drive the screw rods 922 to slide on the cavity cover plate 92 under extrusion, and compress the compression spring 924. By using the reset elasticity of the stepping spring 924, the auxiliary wheel 925 can cooperate with the traction wheel 915 to press the multi-core lighting optical fiber, which is convenient for traction and pulling; A drain pipe 913 is fixedly connected to the rear wall of the cooling cavity 91 near the horizontal plane at the bottom of the traction perforation 912, and a water inlet pipe 921 is fixedly connected to the top of the cavity cover plate 92 near one end. This facilitates the use of the traction perforation 912 to guide the multi-core optical fiber after stranding and injection molding, enabling it to be quickly cooled by the internal cooling medium when passing through the inside of the cooling cavity 91, thereby fixing the stranded multi-core optical fiber. Moreover, the coordinated use of the water inlet pipe 921 and the drain pipe 913 can ensure the circulating flow of the internal cooling medium.

[0036] Among them, several optical fiber core groups 1 sequentially pass through the arrangement rack 5, the stranding mechanism 7, the injection molding machine 8, and the traction mechanism 9; The strengthening tube 2 sequentially passes through the wire pay-off mechanism 4, the arrangement rack 5, the stranding mechanism 7, the injection molding machine 8, and the traction mechanism 9, and its two ends are respectively connected to a pay-off machine and a take-up machine.

[0037] As Figures 2 - 15 shown, a method for using a multi-core lighting optical fiber stranding device includes the following steps: S1. First, simultaneously lead multiple groups of optical fiber core groups 1 and the strengthening tube 2 from the wire pay-off mechanism 4 towards the traction mechanism 9, enabling them to sequentially pass through the arrangement rack 5, the stranding mechanism 7, the injection molding machine 8, and the traction mechanism 9, and connecting them to an external take-up machine; S2. Then, inject a cooling medium into the interior of the cooling cavity 91 through the water inlet pipe 921 and achieve connected circulation using the drain pipe 913 to rapidly cool the injection-molded protective sleeve 3; S3. Then, when the external control system receives a start command, simultaneously send initialization signals to the driving mechanisms at each station, specifically including: S31. Send a signal to the traction motor 918 in the traction mechanism 9 to drive the driving wheel 919 on its output shaft to rotate, and use multiple synchronous belts 917 to cause multiple driven wheels 916 connected in transmission to rotate, thereby driving the traction wheel 915 on the internal traction roller 914 to rotate. Additionally, cooperate with the compression spring 924 to use the auxiliary wheel 925 pressed against the multi-core lighting optical fiber to traction and pull the multi-core lighting optical fiber with the injection-molded protective sleeve 3; S32. Send a signal to the injection molding machine 8, and its internal heating structure heats the raw material of the protective sleeve 3 to form a fluid that coats the surface of the optical fiber core group 1, and after rapid cooling inside the cooling cavity 91, the protective sleeve 3 fixes the multi-core optical fiber stranded inside; S33. Send a signal to the stranding motor 79 in the stranding mechanism 7 to drive the rotating shaft 78 on the end face of the output shaft to rotate, thereby driving the three toothed wheels 74 to rotate on the vertical plate 73. Then, through the transmission of the toothed belt 75, the two stranding discs 76 and one positioning disc 77 are driven to rotate slowly, so that multiple groups of optical fiber core groups 1 are spirally wound in the S direction on the strength member 2. At the same time, the positioning frame 771 built in the positioning disc 77 can closely fit the optical fiber core group 1 with a certain plastic deformation on the outer wall of the strength member 2; When a certain stranding pitch is reached, the stranding motor 79 reverses at this time, so that the two stranding discs 76 and one positioning disc 77 rotate slowly in the reverse direction, so that multiple groups of optical fiber core groups 1 are spirally wound in the Z direction on the strength member 2. At the same time, the positioning frame 771 built in the positioning disc 77 can closely fit the optical fiber core group 1 with a certain plastic deformation on the outer wall of the strength member 2, thereby completing the stranding operation of the multi-core optical fiber; At the same time, the tensioning wheel 65 in the tensioning assembly 6 is squeezed by the optical fiber core group 1 pulled by the forward and reverse stranding, so that the tensioning wheel 65 drives the sliding plate 64 to slide on the sliding rod 63 and squeezes the tension spring 66 at the top. The reset elasticity of the tension spring 66 causes it to drive the tensioning wheel 65 to perform dynamic tensioning adjustment on the optical fiber core group 1 to ensure the stable movement of the optical fiber core group 1; S34. Send a signal to the pay-off motor 48 in the pay-off mechanism 4 to drive the driving gear 49 on the end face of its output shaft to rotate, which drives the driven gear ring 47 connected in mesh to rotate, thereby driving the rotation of multiple driven gears 45 connected in mesh. Furthermore, the fiber core spool 44 rotates on the holder 43 to achieve stable pay-off operation during the stranding process; S35. Send a signal to the pay-off machine and the take-up machine at both ends of the strength member 2 to realize the pay-off of the strength member 2 and the take-up operation after forming the multi-core lighting optical fiber.

[0038] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A multi-core lighting optical fiber, comprising a plurality of optical fiber core groups (1), characterized in that: Each of the plurality of optical fiber core groups (1) is arranged such that a plurality of outer optical fiber cores are spirally wound around a plurality of inner optical fiber cores; A plurality of the optical fiber core groups (1) tightly wrap the reinforcing tube (2) arranged inside in a form of reciprocating spiral stranding to avoid torque accumulation and enhance the tensile strength of the lighting optical fiber. At the same time, a protective sleeve (3) is injection-molded on the outside to protect the optical fiber core group (1).

2. A multi-core lighting optical fiber stranding device applied to the one described in claim 1, characterized in that: It includes a positioning base plate (10) for coaxially installing and fixing a plurality of mechanisms; A wire feeding mechanism (4) detachably installed on the upper surface of the positioning base plate (10) near one end to stably and continuously feed a plurality of optical fiber core groups (1); An arrangement rack (5) installed in the middle of the wire feeding mechanism (4) through a plurality of connecting rods for neatly arranging and distributing a plurality of optical fiber core groups (1); A plurality of tensioning components (6) bolt-connected to one end of the arrangement rack (5) in the circumferential direction for tensioning adjustment of the optical fiber core group (1) during the stranding process; A stranding mechanism (7) bolt-connected to the upper surface of the positioning base plate (10) near the middle for reciprocally stranding a plurality of optical fiber core groups (1) on the outer wall of the reinforcing tube (2); An injection molding machine (8) bolt-connected to the upper surface of the positioning base plate (10) for injection-molding a protective sleeve (3) on the outer wall of the stranded lighting optical fiber; A traction mechanism (9) bolt-connected to the upper surface of the positioning base plate (10) near the other end for traction of the processed lighting optical fiber; Among them, a plurality of the optical fiber core groups (1) sequentially pass through the arrangement rack (5), the stranding mechanism (7), the injection molding machine (8), and the traction mechanism (9); The reinforcing tube (2) sequentially passes through the wire feeding mechanism (4), the arrangement rack (5), the stranding mechanism (7), the injection molding machine (8), and the traction mechanism (9), and a pay-off machine and a take-up machine are respectively connected to both ends thereof.

3. A multi-core lighting optical fiber stranding device according to claim 2, characterized in that: The wire feeding mechanism (4) includes a mounting frame (42) bolt-connected to the top of the positioning base plate (10) through a fixing seat (41). A plurality of clamping frames (43) are uniformly fixedly connected to one surface of the mounting frame (42) in the circumferential direction. A fiber core reel (44) is rotatably connected to the end face of each of the plurality of clamping frames (43). One end of a rotating shaft arranged in each of the plurality of fiber core reels (44) is fixedly connected to a driven gear (45), and the other end is snap-connected to a limiting ring (46); The outer walls of the plurality of driven gears (45) are meshed with a driving gear ring (47). The driving gear ring (47) is meshed with a driving gear (49) sleeved on the output shaft of a wire feeding motor (48), and the wire feeding motor (48) is bolt-connected to the other surface of the mounting frame (42) near the bottom position.

4. A multi-core lighting optical fiber stranding device according to claim 3, characterized in that: The driving gear ring (47) is rotatably connected to one surface of the mounting frame (42) near the edge, and the tooth blocks arranged on its surface are integrally L-shaped. The rotating gear ring (47) is meshed with the driving gear (49) and the driven gear (45) respectively through the tooth blocks.

5. A multi-core lighting optical fiber stranding device according to claim 3, characterized in that: The arrangement rack (5) includes a plurality of guide tubes (53) arranged at equal intervals in the circumferential direction, and a lead ring plate (51) and an outlet ring plate (52) respectively installed at both ends of the guide tubes (53). The lead ring plate (51) is fixedly connected to the middle position of the mounting frame (42) through a plurality of connecting rods; Among them, a plurality of the guiding tubes (53) are arranged in a converging manner from the lead wire ring plate (51) towards the wire outlet ring plate (52). The lead wire ring plate (51) and the wire outlet ring plate (52) are respectively and evenly equidistantly provided with a plurality of lead wire holes (511) and wire outlet holes (521) along the circumferential direction, and both ends of the plurality of guiding tubes (53) are respectively communicated with the lead wire holes (511) and the wire outlet holes (521); Embedded sleeves (512) are embedded in the inner walls of the plurality of lead wire holes (511), and a plurality of weight-reducing holes (531) are formed in the outer walls of the plurality of guiding tubes (53), and the whole is provided in a hollowed-out manner.

6. The multi-core lighting optical fiber stranding device according to claim 5, characterized in that: The tensioning assembly (6) includes a frame body (61) bolted to one side of the lead wire ring plate (51) near the edge, facing the wire pay-off mechanism (4), and the frame body (61) is located on both sides of the lead wire hole (511); Activation slots (62) are symmetrically formed at positions near the end faces on both sides of the frame body (61). Slide rods (63) are installed in the two activation slots (62) from top to bottom and fixed with nuts. A slide plate (64) is slidably connected to the outer walls of the two slide rods (63). A tensioning wheel (65) is bolted to the bottom of the slide plate (64). Two tensioning springs (66) are tightly abutted against the top of the slide plate (64), and the two tensioning springs (66) are respectively sleeved outside the two slide rods (63), and the other ends of the two tensioning springs (66) are tightly abutted against the inner top of the activation slot (62).

7. The multi-core lighting optical fiber stranding device according to claim 6, characterized in that: The stranding mechanism (7) includes a connecting plate (72) bolted to the positioning bottom plate (10) through a plurality of angle blocks (71), and three vertical plates (73) are equidistantly and fixedly connected to the top of the connecting plate (72); Toothed wheels (74) are rotatably connected to the side walls of the three vertical plates (73) near the bottom positions. One of the toothed wheels (74) is arranged opposite to the other two toothed wheels (74). Toothed belts (75) are meshed with the outer walls of the three toothed wheels (74). One end of the inner wall of one of the toothed belts (75) far from the toothed wheel (74) is meshed with a positioning disc (77), and one end of the inner wall of the other two toothed belts (75) far from the toothed wheel (74) is meshed with stranding discs (76). A rotating shaft (78) is arranged through the three vertical plates (73) near the bottom positions, and the outer wall of the rotating shaft (78) is connected to the three toothed wheels (74) by interference fit. One end of the rotating shaft (78) is fixedly connected to the output shaft of a stranding motor (79) installed on the side wall of one of the vertical plates (73); The two stranding discs (76) and one positioning disc (77) are respectively rotatably connected to the positions near the top of the three vertical plates (73). A plurality of limiting holes (761) are evenly formed in the circumferential direction of the two stranding discs (76). A positioning frame (771) is arranged on the inner wall of the positioning disc (77), and an arc-shaped groove equal to the optical fiber core group (1) is formed in the inner wall of the positioning frame (771).

8. A multi-core lighting optical fiber stranding device according to claim 2, characterized in that: The traction mechanism (9) includes a cooling cavity body (91) bolted to the positioning bottom plate (10) through a support frame (911) and a cavity cover plate (92) bolted to it after being covered; At the centers of both ends of the cooling cavity (91), traction perforations (912) are provided. Near one end position of the inner wall of the cooling cavity (91), a plurality of traction rollers (914) are evenly rotatably connected, and the end faces of the traction rollers (914) extend out of the outer wall of the cooling cavity (91). Traction wheels (915) are sleeved at the middle positions of the plurality of traction rollers (914), and driven wheels (916) are sleeved at the end faces of the plurality of traction rollers (914). A traction motor (918) is bolted to the bottom of the cooling cavity (91), and a driving wheel (919) is sleeved at the output end of the traction motor (918). The driving wheel (919) and the plurality of driven wheels (916) are sequentially sleeved with a synchronous belt (917) to achieve synchronous transmission; At the top of the cavity cover plate (92) and directly above the plurality of traction rollers (914), two screw rods (922) are penetrated and limited and fixed by external nuts. The bottoms of the two screw rods (922) are fixedly connected with a U-shaped frame (923). A plurality of auxiliary wheels (925) are evenly rotatably connected to the inner wall of the U-shaped frame (923), and the auxiliary wheels (925) respectively correspond to the plurality of traction wheels (915). Pressing springs (924) are sleeved on the outer walls of the two screw rods (922), and both ends of the two pressing springs (924) are respectively abutted against the cavity cover plate (92) and the U-shaped frame (923).

9. The multi-core lighting optical fiber stranding device according to claim 8, characterized in that: A drain pipe (913) is fixedly connected to the rear wall of the cooling cavity (91) near the horizontal plane at the bottom of the traction perforation (912). A water inlet pipe (921) is fixedly connected to the top of the cavity cover plate (92) near one end position.

10. A method for using a multi-core lighting optical fiber stranding device according to any one of claims 2-9, characterized in that: It includes the following steps: S1. First, a plurality of groups of optical fiber core groups (1) and strengthening tubes (2) are simultaneously led out from the wire pay-off mechanism (4) towards the traction mechanism (9), and sequentially pass through the arranging rack (5), the stranding mechanism (7), the injection molding machine (8) and the traction mechanism (9), and are connected to an external winding machine; S2. Then, a cooling medium is injected into the cooling cavity (91) through the water inlet pipe (921) and a communication cycle is realized by using the drain pipe (913) to quickly cool the injection-molded protective sleeve (3); S3. Then, when the external control system receives a start command, initialization signals are simultaneously sent to the driving mechanisms of each station, specifically including: S31. A signal is sent to the traction motor (918) in the traction mechanism (9) to drive the driving wheel (919) on the output shaft to rotate. The plurality of synchronous belts (917) are used to make the plurality of driven wheels (916) in transmission connection rotate, so as to drive the traction wheels (915) on the internal traction rollers (914) to rotate. Then, the auxiliary wheels (925) pressing on the multi-core lighting optical fiber are used in cooperation with the pressing springs (924) to traction and pull the multi-core lighting optical fiber with the protective sleeve (3) injection-molded thereon; S32. Send a signal to the injection molding machine (8), and its internal heating structure heats the raw material of the protective sleeve (3) to form a fluid that coats the surface of the optical fiber core group (1). After rapid cooling inside the cooling cavity (91), the protective sleeve (3) fixes the multi-core optical fiber after internal stranding; S33. Send a signal to the stranding motor (79) in the stranding mechanism (7) to drive the rotating shaft (78) at the end of the output shaft to rotate, thereby driving the three toothed wheels (74) to rotate on the vertical plate (73). Then, through the transmission of the toothed belt (75), the two stranding disks (76) and one positioning disk (77) rotate slowly, so that multiple groups of optical fiber core groups (1) are helically wound in the S direction on the strengthening tube (2). At the same time, the positioning frame (771) built in the positioning disk (77) can tightly fit the optical fiber core group (1) with a certain plastic deformation on the outer wall of the strengthening tube (2); When reaching a certain stranding pitch, the stranding motor (79) reverses at this time, so that the two stranding disks (76) and one positioning disk (77) rotate slowly in the reverse direction, so that multiple groups of optical fiber core groups (1) are helically wound in the Z direction on the strengthening tube (2). At the same time, the positioning frame (771) built in the positioning disk (77) can tightly fit the optical fiber core group (1) with a certain plastic deformation on the outer wall of the strengthening tube (2), thereby completing the stranding operation of the multi-core optical fiber; At the same time, the tensioning wheel (65) in the tensioning assembly (6) is squeezed by the optical fiber core group (1) pulled by positive and reverse stranding. As a result, the tensioning wheel (65) drives the slide plate (64) to slide on the slide rod (63) and squeezes the tensioning spring (66) at the top. The reset elasticity of the tensioning spring (66) drives the tensioning wheel (65) to perform dynamic tensioning adjustment on the optical fiber core group (1) to ensure the stable movement of the optical fiber core group (1); S34. Send a signal to the wire pay-off motor (48) in the wire pay-off mechanism (4) to drive the driving gear (49) at the end of the output shaft to rotate, which drives the meshing-connected driving toothed ring (47) to rotate, thereby driving the rotation of multiple meshing-connected driven gears (45). Furthermore, the fiber core reel (44) rotates on the holder (43) to achieve stable wire pay-off operation during stranding; S35. Send a signal to the pay-off machine and the take-up machine at both ends of the strengthening tube (2) to realize the wire pay-off of the strengthening tube (2) and the take-up operation after forming the multi-core lighting optical fiber.

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