Color strip optical fiber, coating mold, coating device and preparation method of color strip optical fiber

Abstract

The invention relates to the technical field of optical fibers, and provides a color strip optical fiber, a coating mold, a coating device and a preparation method of the color strip optical fiber. The inner coating coats the surface of the optical fiber body; the outer coating coats the surface of the inner coating, a plurality of color strip grooves are formed in the outer coating, and the plurality of color strip grooves penetrate through the outer coating in the length direction of the optical fiber body; the plurality of color strip grooves are uniformly distributed in the outer coating, so that the stress of the color strip grooves is uniform, and no extra stress is generated on the optical fiber body; and the plurality of color bar layers are arranged in the plurality of color bar grooves. The plurality of color strip groove structures are arranged on the coating on the surface of the optical fiber and are uniformly distributed, so that the geometrically and uniformly distributed color strips do not generate additional stress on the optical fiber in the use process, and the color strip optical fiber is prevented from generating additional attenuation change. The production cost is low, the identification degree is high, and the appearance identification capacity is large. And the optical fiber loss can be greatly reduced under the extremely high temperature or low temperature condition.

Description

Technical Field

[0001] The present application relates to the field of optical fiber technology, and in particular to a color strip optical fiber, a coating mold, a coating device, and a method for preparing the color strip optical fiber. Background Art

[0002] With the rapid development of optical fiber communication and its wide application in power systems, OPGW optical cable, or optical fiber composite overhead ground wire, came into being. It not only integrates the dual functions of optical fiber communication and power transmission. By perfectly integrating the optical fiber communication unit with the power transmission conductor, OPGW optical cable not only makes full use of the resources of the existing power line, but also greatly improves the reliability of the communication system. Its high bandwidth and low loss characteristics make data transmission faster and more efficient, meeting the needs of modern communication for high-speed and large-capacity data transmission. At the same time, OPGW optical cable also has strong anti-interference ability and safety performance, which can effectively resist interference from external factors such as lightning and electromagnetic interference, ensuring the purity and accuracy of communication signals.

[0003] Due to the structural characteristics of OPGW optical cables, the internal optical fiber units often have multiple groups of 12 cores / tube structures. The same color optical fibers in different units need to be distinguished by spraying color rings or color bands on the optical fiber surface. However, since the color ring spraying is performed locally and discontinuously on the optical fiber surface, it will cause local stress on the optical fiber, resulting in optical fiber micro-bending loss. This loss is particularly obvious under extremely high or low temperature conditions, seriously affecting the optical fiber transmission performance.

[0004] It can be seen that the existing color-strip optical fiber, due to the influence of its own structure, will cause local stress in the optical fiber, which in turn causes micro-bending loss of the optical fiber. The loss becomes more obvious under extremely high or low temperature conditions, seriously affecting the transmission performance of the optical fiber. Summary of the invention

[0005] The purpose of the present application is to provide a color strip optical fiber, a coating mold, a coating device and a method for preparing the color strip optical fiber, so as to solve the technical problems in the prior art that the color strip optical fiber is limited by its own structure, has a short blowing distance, is still difficult to construct, has low laying efficiency, and has high maintenance costs and difficulties during the operation stage.

[0006] Based on this, in the first aspect, the present application provides a color stripe optical fiber, including: an optical fiber body; an inner coating, coated on the surface of the optical fiber body; an outer coating, coated on the surface of the inner coating, and a plurality of color stripe grooves are arranged on the outer coating, and the plurality of color stripe grooves penetrate the outer coating along the length direction of the optical fiber body; the plurality of color stripe grooves are evenly distributed on the outer coating, so that the color stripe grooves are evenly stressed and no additional stress is generated on the optical fiber body; and a plurality of color stripe layers are arranged in the plurality of color stripe grooves.

[0007] In a possible implementation, the multiple color stripe grooves have the same shape and size; each color stripe groove has an opening, and the multiple openings are located on the surface of the outer coating.

[0008] In a possible implementation, the cross-sectional profile of the color stripe groove is semicircular.

[0009] In a possible implementation, the number of the plurality of color stripe slots is three.

[0010] In a possible implementation, the plurality of color stripe layers are formed by curing paint, and the paint forming the plurality of color stripe layers has the same color.

[0011] In the second aspect, a coating mold is provided, comprising an inner mold and a mold base, the mold base having a cavity inside, and the inner mold fixed in the cavity; the inner mold comprises an introduction mold, an inner coating mold, an outer coating mold and a color stripe mold, the introduction mold, the inner coating mold, the outer coating mold and the color stripe mold are concentrically arranged, and the inner coating mold is sleeved on part of the introduction mold, the outer coating mold is sleeved on part of the inner coating mold, and the color stripe mold is sleeved on part of the outer coating mold; the inner coating mold is provided with an inner coating feed pipe, the outer coating mold is provided with an outer coating feed pipe, and the color stripe mold is provided with a color stripe layer feed pipe.

[0012] In one possible implementation, the mold base includes an introduction mold base and a coating mold base, and the introduction mold base is fixedly connected to the coating mold base; a coating protection air duct is opened on the introduction mold base, and the coating protection air duct is connected to the cavity; an inner coating supply pipe, an outer coating supply pipe and a color stripe layer supply pipe are opened on the coating mold base, the inner coating supply pipe is connected to the inner coating feed pipe, the outer coating supply pipe is connected to the outer coating feed pipe, and the color stripe layer supply pipe is connected to the color stripe layer feed pipe.

[0013] In one possible implementation, the outer surface of the inlet mold base is provided with a coating protection air duct interface, and the coating protection air duct interface is connected to the coating protection air duct; the outer surface of the coating mold base is provided with an inner coating supply pipeline interface, an outer coating supply pipeline interface and a color stripe layer supply pipeline interface, wherein the inner coating supply pipeline interface is connected to the inner coating supply pipeline, the outer coating supply pipeline interface is connected to the outer coating supply pipeline, and the color stripe layer supply pipeline interface is connected to the color stripe layer supply pipeline.

[0014] In yet another aspect, a coating device is provided, comprising the coating die as described above.

[0015] On the other hand, a method for preparing a color stripe optical fiber is provided, which is applied to the above-mentioned color stripe optical fiber, comprising:

[0016] Sequentially coating the optical fiber body with an inner coating and an outer coating through a coating mold;

[0017] A color stripe groove is formed on the surface of the outer coating layer, and a color stripe layer is filled in the color stripe groove;

[0018] Curing the coated optical fiber by a curing unit;

[0019] Measure diameter and compensate for cured optical fiber.

[0020] The beneficial effects of a color stripe optical fiber, a coating mold, a coating device, and a method for preparing a color stripe optical fiber provided by the present application are at least that: the present application sets a plurality of color stripe groove structures on the surface coating of the optical fiber and distributes them evenly. During use, the geometrically evenly distributed color stripes will not generate additional stress on the optical fiber, thereby avoiding additional attenuation changes in the color stripe optical fiber. The production cost is low, the recognition is high, and the appearance recognition capacity is large. In extremely high or low temperature conditions, the optical fiber loss can be greatly reduced. The technical problem in the prior art that the color stripe optical fiber, due to the influence of its own structure, will cause local stress in the optical fiber, thereby causing micro-bending loss of the optical fiber, and the loss becomes more obvious in extremely high or low temperature conditions, seriously affecting the transmission performance of the optical fiber is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the cross-sectional structure of a color stripe optical fiber in an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the exploded structure of an inner mold of a coating mold in an embodiment of the present application;

[0023] Figure 3 It is a schematic diagram of the assembly structure of an inner mold of a coating mold in an embodiment of the present application;

[0024] Figure 4 is a schematic diagram of the assembly structure of a coating mold in an embodiment of the present application;

[0025] Figure 5 is a schematic structural diagram of a coating device in an embodiment of the present application;

[0026] Figure 6 It is a schematic flow chart of a method for preparing a color strip optical fiber in an embodiment of the present application.

[0027] In the figure: 1. optical fiber body; 2. inner coating; 3. outer coating; 4. color stripe layer; 5. introduction mold; 6. inner coating mold; 7. outer coating mold; 8. color stripe mold; 9. introduction hole; 10. inner coating hole; 11. outer coating hole; 12. color stripe coating hole; 13. color stripe groove; 14. inner mold; 15. inner coating supply pipeline; 16. outer coating supply pipeline; 17. color stripe layer supply pipeline; 20. coating mold base; 21. inner coating supply pipeline interface; 22. outer coating supply pipeline interface; 23. color stripe layer supply pipeline interface; 24. introduction mold base; 25. coating protection airway interface; 27. curing unit; 28. upper positioning wheel; 29. ​​twisting wheel; 30. lower positioning wheel; 31. diameter gauge; 32. compensation wheel; 33. base; 34. tension wheel; 35. traction machine. DETAILED DESCRIPTION

[0028] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0029] With the rapid development of optical fiber communication and its wide application in power systems, OPGW optical cable, or optical fiber composite overhead ground wire, came into being. It not only integrates the dual functions of optical fiber communication and power transmission. By perfectly integrating the optical fiber communication unit with the power transmission conductor, OPGW optical cable not only makes full use of the resources of the existing power line, but also greatly improves the reliability of the communication system. Its high bandwidth and low loss characteristics make data transmission faster and more efficient, meeting the needs of modern communication for high-speed and large-capacity data transmission. At the same time, OPGW optical cable also has strong anti-interference ability and safety performance, which can effectively resist interference from external factors such as lightning and electromagnetic interference, ensuring the purity and accuracy of communication signals.

[0030] Due to the structural characteristics of OPGW optical cables, the internal optical fiber units often have multiple groups of 12 cores / tube structures. The same color optical fibers in different units need to be distinguished by spraying color rings or color bands on the optical fiber surface. However, since the color ring spraying is performed locally and discontinuously on the optical fiber surface, it will cause local stress on the optical fiber, resulting in optical fiber micro-bending loss. This loss is particularly obvious under extremely high or low temperature conditions, seriously affecting the optical fiber transmission performance.

[0031] It can be seen that the existing color-strip optical fiber, due to the influence of its own structure, will cause local stress in the optical fiber, which in turn causes micro-bending loss of the optical fiber. The loss becomes more obvious under extremely high or low temperature conditions, seriously affecting the transmission performance of the optical fiber.

[0032] Therefore, the embodiment of the present application provides a color stripe optical fiber, such as Figure 1 As shown, the color stripe optical fiber comprises: an optical fiber body 1, an inner coating 2, an outer coating 3 and a plurality of color stripe layers 4. The inner coating 2 is coated on the surface of the optical fiber body 1. The outer coating 3 is coated on the surface of the inner coating 2, and a plurality of color stripe grooves 13 are arranged on the outer coating 3, and the plurality of color stripe grooves 13 penetrate the outer coating 3 along the length direction of the optical fiber body 1. The plurality of color stripe layers 4 are arranged in the plurality of color stripe grooves 13. The plurality of color stripe grooves 13 are evenly distributed in the outer coating 3, so that the color stripe grooves 13 are evenly stressed and no additional stress is generated on the optical fiber body 1.

[0033] The optical fiber body 1 refers to an optical fiber, also called an optical cable or an optical fiber, which is a fiber made of glass or plastic and can be used as a light transmission tool. It is widely used in the field of data communications as a carrier for information transmission.

[0034] In this embodiment, an inner coating 2 is coated on the surface of the optical fiber body 1, and the inner coating 2 completely covers the optical fiber body 1. The outer coating 3 is fixedly arranged on the inner coating 2, and the outer coating 3 can completely cover the inner coating 2. In addition to protecting the optical fiber body 1 from damage, the inner coating 2 also serves as the basis of the outer coating 3 and provides support for the outer coating 3.

[0035] In one embodiment, the optical fiber body 1, the inner coating 2 and the outer coating 3 are fixed through a coating process to form an inseparable whole, thereby ensuring the stability and consistency of the color strip optical fiber. The optical fiber body 1, the inner coating 2 and the outer coating 3 will not separate and affect the construction.

[0036] In one embodiment, the inner coating 2 may partially cover the optical fiber body 1 , and the outer coating 3 may also partially cover the inner coating 2 .

[0037] A plurality of color stripe grooves 13 are provided on the outer coating layer 3 , and the plurality of color stripe grooves 13 penetrate the outer coating layer 3 along the length direction of the optical fiber body 1 .

[0038] Multiple color stripe grooves 13 are used to install the color stripe layer 4, and the color stripe layer 4 is used to identify the optical fiber. The same color optical fiber surfaces between different units need to be provided with the color stripe layer 4 to distinguish them, which is beneficial to the laying and maintenance of the optical fiber. In this embodiment, multiple color stripe layers 4 are fixed in multiple color stripe grooves 13, and multiple color stripe grooves 13 are arranged along the length direction of the optical fiber body 1. The multiple color stripe grooves 13 and the color stripe layer 4 uniformly distributed on the outer coating 3 make the optical fiber body 1 evenly stressed, and the forces acting on the optical fiber body 1 are balanced, so that the forces along the radial direction of the cross section of the optical fiber body 1 are in a balanced state, which greatly reduces the microbending loss of the optical fiber body 1 and saves costs.

[0039] In one example, the color stripe layer 4 is filled in the color stripe groove 13, and the color stripe layer 4 is formed by curing a colored paint. The color stripe layer 4 and the surface of the outer coating layer 3 are on the same cylindrical surface, that is, the color stripe layer 4 filled in the color stripe groove 13 and the surface of the outer coating layer 3 form a cylindrical surface.

[0040] The shapes of the plurality of color stripe grooves 13 can be set according to actual effects, and the cross section is preferably semicircular.

[0041] In this embodiment, an inner coating 2 is provided to protect the optical fiber body 1, and an outer coating 3 with color stripe grooves 13 is provided on the inner coating 2, so that the same-color optical fibers of different units can be effectively distinguished. The multiple color stripe grooves 13 and the color stripe layer 4 evenly distributed on the outer coating 3 make the optical fiber body 1 evenly stressed, reduce the microbending loss of the optical fiber body 1, and save costs.

[0042] Compared with the prior art, the present application fills a color stripe layer 4 in a plurality of color stripe grooves 13 and distributes them evenly. During use, the geometrically evenly distributed color stripe layer 4 will not generate additional stress on the optical fiber, thus avoiding additional attenuation changes in the color stripe optical fiber. The production cost is low, the recognition is high, and the appearance recognition capacity is large. In extremely high or low temperature conditions, the optical fiber loss can be greatly reduced. The technical problem in the prior art that the color stripe optical fiber, due to the influence of its own structure, will cause local stress in the optical fiber, thereby causing micro-bending loss of the optical fiber, and the loss becomes more obvious in extremely high or low temperature conditions, seriously affecting the transmission performance of the optical fiber is solved.

[0043] In one embodiment, the plurality of color stripe grooves 13 have the same shape and size. Each color stripe groove 13 has an opening, and the plurality of openings are located on the surface of the outer coating 3 .

[0044] Specifically, in this embodiment, a plurality of color stripe grooves 13 are arranged on the outer coating 3, and the openings of the plurality of color stripe grooves 13 are located on the outer surface of the outer coating 3. The plurality of color stripe grooves 13 have the same shape and size, so as to make the color stripe optical fiber be subjected to balanced force. The plurality of color stripe grooves 13 uniformly distributed on the outer coating 3 are subjected to the same radial force, but the radial force directions of each color stripe groove 13 are different. The uniformly distributed plurality of color stripe grooves 13 can make the radial forces offset each other, thereby making the color stripe optical fiber in a state of force balance, greatly reducing the microbend loss of the optical fiber body 1, and saving costs.

[0045] In one embodiment, the cross-sectional profile of the color stripe groove 13 is semicircular. The opening of the color stripe groove 13 is on the outer surface of the outer coating layer 3. The bottom of the color stripe groove 13 is close to the inner coating layer 2. A color stripe layer 4 is arranged in the color stripe groove 13, and the color stripe layer 4 is fixedly arranged with the color stripe groove 13. The color stripe layer 4 can be filled in the color stripe groove 13 by coating and stably fixed. The color stripe layer 4 is bonded and fixed to the color stripe groove 13 by a curing process to ensure that it does not separate.

[0046] In one embodiment, the number of the plurality of color stripe slots 13 is three.

[0047] In this embodiment, three color stripe grooves 13 are provided, forming a triangular color stripe groove 13 structure on the outer coating 3. The triangular color stripe groove 13 structure makes the color stripe optical fiber more stable. It can effectively distinguish the same-color optical fibers of different units. The multiple color stripe grooves 13 and the color stripe layer 4 evenly distributed on the outer coating 3 make the optical fiber body 1 evenly stressed, reducing the microbending loss of the optical fiber body 1. The color stripe grooves 13 are evenly distributed geometrically, and will not generate additional stress on the optical fiber body 1, and will not generate additional influence on the optical fiber transmission performance.

[0048] In one embodiment, the plurality of color stripe layers 4 are formed by curing paint, and the paint forming the plurality of color stripe layers 4 has the same color.

[0049] The embodiment of the present application adopts a structure of multiple color stripe grooves 13, and fills the color stripe layer 4 in the multiple color stripe grooves 13. The multiple color stripe grooves 13 are evenly distributed. During use, the geometrically evenly distributed color stripe layer 4 will not produce additional stress on the optical fiber, avoiding additional attenuation changes in the color stripe optical fiber. The production cost is low, the recognition is high, and the appearance recognition capacity is large. In extremely high or low temperature conditions, it can greatly reduce the optical fiber loss.

[0050] The present application also provides a coating mold for making the above-mentioned color strip optical fiber, such as Figure 2-4 As shown, it includes an inner mold 14 and a mold base, the mold base has a cavity inside, and the inner mold 14 is fixed in the cavity. The inner mold 14 includes an introduction mold 5, an inner coating mold 6, an outer coating mold 7 and a color stripe mold 8. The introduction mold 5, the inner coating mold 6, the outer coating mold 7 and the color stripe mold 8 are concentrically arranged, and the inner coating mold 6 is sleeved on part of the introduction mold 5, the outer coating mold 7 is sleeved on part of the inner coating mold 6, and the color stripe mold 8 is sleeved on part of the outer coating mold 7. The inner coating mold 6 is provided with an inner coating feed pipe, the outer coating mold 7 is provided with an outer coating feed pipe, and the color stripe mold 8 is provided with a color stripe layer 4 feed pipe.

[0051] Specifically, in this embodiment, the color stripe optical fiber includes: an optical fiber body 1, an inner coating 2 and an outer coating 3. The inner coating 2 is coated on the surface of the optical fiber body 1. The outer coating 3 is fixed on the inner coating 2, and a plurality of color stripe grooves 13 are provided on the outer coating 3, and the plurality of color stripe grooves 13 penetrate the outer coating 3 along the length direction of the optical fiber body 1. The plurality of color stripe grooves 13 are evenly distributed on the outer coating 3, so that the optical fiber body 1 is evenly stressed, and no additional stress is generated on the optical fiber body 1.

[0052] The surface of the optical fiber body 1 is coated with an inner coating 2. The inner coating 2 completely covers the optical fiber body 1, and the outer coating 3 is fixedly arranged on the inner coating 2 and can completely cover the inner coating 2. In addition to protecting the optical fiber body 1 from damage, the inner coating 2 also serves as the basis of the outer coating 3 and provides support for the outer coating 3. In another example, the inner coating 2 can partially cover the optical fiber body 1, and the outer coating 3 can also partially cover the inner coating 2.

[0053] The plurality of color stripe grooves 13 are used to install the color stripe layer 4, the plurality of color stripe layers 4 are fixed in the plurality of color stripe grooves 13, and the plurality of color stripe grooves 13 are arranged along the length direction of the optical fiber body 1. The plurality of color stripe grooves 13 and the color stripe layer 4 uniformly distributed on the outer coating 3 make the optical fiber body 1 evenly stressed, and the forces acting on the optical fiber body 1 are mutually balanced, so that the forces along the radial direction of the cross section of the optical fiber body 1 are in a balanced state, which greatly reduces the microbending loss of the optical fiber body 1 and saves costs.

[0054] The shapes of the plurality of color stripe grooves 13 can be set according to actual effects.

[0055] During the use of the coating mold, the optical fiber body 1 is placed in the inner mold 14 and can be pulled by the external pulling machine 35. The optical fiber body 1 can be coated with the inner coating 2, the outer coating 3 and the color stripe layer 4 in the inner mold 14. The inner mold 14 mainly includes an introduction mold 5, an inner coating mold 6, an outer coating mold 7 and a color stripe mold 8. The introduction mold 5, the inner coating mold 6, the outer coating mold 7 and the color stripe mold 8 are concentrically arranged, and the inner coating mold 6 is sleeved on part of the introduction mold 5, the outer coating mold 7 is sleeved on part of the inner coating mold 6, and the color stripe mold 8 is sleeved on part of the outer coating mold 7.

[0056] The inner coating mold 6 is provided with an inner coating feed pipe, the outer coating mold 7 is provided with an outer coating feed pipe, and the color stripe mold 8 is provided with a color stripe layer 4 feed pipe. The coating material is applied to the optical fiber body 1 through the inner coating feed pipe to form the inner coating 2. The coating material is applied to the inner coating 2 through the outer coating feed pipe to form the outer coating 3. The coating material is applied to the color stripe groove 13 provided on the outer coating 3 through the color stripe layer 4 feed pipe to form the color stripe layer 4.

[0057] The introduction mold 5, the inner coating mold 6, the outer coating mold 7 and the color stripe mold 8 are respectively fixed together by threaded connection. The introduction mold 5, the inner coating mold 6, the outer coating mold 7 and the color stripe mold 8 are all set to be cylindrical, and the introduction mold 5, the inner coating mold 6, the outer coating mold 7 and the color stripe mold 8 are concentrically arranged. A through hole is opened at the center of the introduction mold 5, the inner coating mold 6, the outer coating mold 7 and the color stripe mold 8 for passing the optical fiber body 1. The central opening of the introduction mold 5 is called the introduction hole 9, the central opening of the inner coating mold 6 is called the inner coating hole 10, the central opening of the outer coating mold 7 is called the outer coating hole 11, and the central opening of the color stripe mold 8 is called the color stripe coating hole 12. Among them, the introduction hole 9, the inner coating hole 10, the outer coating hole 11 and the color stripe coating hole 12 are all concentrically arranged. In some examples, the shape and size of the introduction hole 9, the inner coating hole 10, the outer coating hole 11 and the color stripe coating hole 12 are the same. Preferably, the introduction hole 9, the inner coating hole 10, the outer coating hole 11 and the color stripe coating hole 12 are configured as circular holes.

[0058] The introduction mold 5 is mainly used to introduce the optical fiber body 1 into the coating mold, and the optical fiber body 1 can be inserted into the introduction mold 5 through the introduction hole 9. The diameter of the introduction hole 9 is slightly larger than the outer diameter of the optical fiber body 1, which facilitates the insertion of the optical fiber body 1.

[0059] An elastic member may be provided on the inner wall of the introduction hole 9. When the optical fiber body 1 is inserted into the introduction hole 9, the elastic member may contact-fix the optical fiber body 1 according to its own elastic force, thereby fixing and guiding the optical fiber body 1 and meeting the requirements of optical fiber bodies 1 of various specifications.

[0060] In one embodiment, the inner wall of the color stripe coating hole 12 is provided with a plurality of protrusions, and the plurality of protrusions are evenly distributed on the inner wall of the color stripe coating hole 12. The plurality of protrusions are used to make the color stripe groove 13, and the shape of the plurality of protrusions can be set to an ellipse. In one example, the shape and size of the plurality of protrusions are the same. The number of the plurality of protrusions can be set as needed, and the number of the plurality of protrusions in this embodiment is set to three.

[0061] In one embodiment, the die base includes an introduction die base 24 and a coating die base 20, and the introduction die base 24 is fixedly connected to the coating die base 20. A coating protection airway is provided on the introduction die base 24, and the coating protection airway is connected to the cavity. An inner coating supply pipeline 15, an outer coating supply pipeline 16 and a color stripe layer supply pipeline 17 are provided on the coating die base 20, the inner coating supply pipeline 15 is connected to the inner coating feed pipeline, the outer coating supply pipeline 16 is connected to the outer coating feed pipeline, and the color stripe layer supply pipeline 17 is connected to the color stripe layer 4 feed pipeline.

[0062] The outer surface of the introduction die base 24 is provided with a coating protection airway interface 25, and the coating protection airway interface 25 is connected to the coating protection airway. The outer surface of the coating die base 20 is provided with an inner coating supply pipeline interface 21, an outer coating supply pipeline interface 22 and a color stripe layer supply pipeline interface 23, wherein the inner coating supply pipeline interface 21 is connected to the inner coating supply pipeline 15, the outer coating supply pipeline interface 22 is connected to the outer coating supply pipeline 16, and the color stripe layer supply pipeline interface 23 is connected to the color stripe layer supply pipeline 17.

[0063] The main function of the mold base is to fix and protect the inner mold 14 and inject coating into the feeding pipe of the inner mold 14. The mold base is divided into an introduction mold base 24 and a coating mold base 20. The introduction mold base 24 is used to insert the optical fiber body 1 and guide the inserted optical fiber body 1.

[0064] The coating protection airway provided on the introduction die holder 24 is connected to the cavity, which can discharge excess gas and protect the coating process. The coating protection airway interface 25 is arranged on the outer wall of the introduction die holder 24. The inner coating feed pipe 15 provided on the coating die holder 20 is connected to the inner coating feed pipe of the inner mold 14, the outer coating feed pipe 16 provided on the coating die holder 20 is connected to the outer coating feed pipe of the inner mold 14, and the color stripe layer feed pipe 17 provided on the coating die holder 20 is connected to the color stripe layer 4 feed pipe of the inner mold 14.

[0065] An inner coating supply pipeline interface 21 is also provided on the outer wall of the coating die base 20 . The inner coating supply pipeline interface 21 is connected to the inner coating supply pipeline 15 and is used to inject coating into the inner coating supply pipeline 15 .

[0066] An external coating supply pipeline interface 22 is also provided on the outer wall of the coating die base 20 . The external coating supply pipeline interface 22 is connected to the external coating supply pipeline 16 for injecting coating into the external coating supply pipeline 16 .

[0067] A color stripe layer supply pipeline interface 23 is also provided on the outer wall of the coating die base 20 . The color stripe layer supply pipeline interface 23 is connected to the color stripe layer supply pipeline 17 and is used to inject coating into the color stripe layer supply pipeline 17 .

[0068] In one embodiment, a conical section is provided at one end of the coating die holder 20, and the guide die holder is fixedly connected to the conical section of the coating die holder 20. In one example, a small-area end surface of the conical section is fixedly connected to the guide die holder.

[0069] The present application adopts a plurality of color strip grooves 13 structure and distributes them evenly. During use, the geometrically evenly distributed color strip layer 4 will not generate additional stress on the optical fiber, thus avoiding additional attenuation changes of the color strip optical fiber. The production cost is low, the recognition is high, and the appearance recognition capacity is large. In extremely high or low temperature conditions, the optical fiber loss can be greatly reduced, thus avoiding the impact on the performance of optical fiber transmission.

[0070] In addition, the present application also provides a coating device, such as Figure 5 As shown, it includes the above-mentioned coating mold, as well as a curing unit 27, an upper positioning wheel 28, a rubbing wheel 29, a lower positioning wheel 30, a diameter gauge 31, a compensation wheel 32, a base 33, a tension wheel 34, and a traction machine 35.

[0071] The curing unit 27 is arranged below the coating mold, and is used to cure the coated color strip optical fiber, so that the inner coating 2, the outer coating 3 and the color strip layer 4 coated on the optical fiber body 1 are cured as a whole. The upper positioning wheel 28, the twisting wheel 29 and the lower positioning wheel 30 are arranged below the curing unit 27, and play the role of positioning and guiding the color strip optical fiber. The diameter gauge 31 is arranged below the lower positioning wheel 30, and is used to measure the diameter of the cured color strip optical fiber. The compensation wheel 32 is fixedly arranged on the base 33, and the base 33 and the compensation wheel 32 are arranged below the diameter gauge 31. The tension wheel 34 is fixed on the frame of the traction machine 35, and the compensated tracking optical fiber enters the traction machine 35 through the guidance of the tension wheel 34, and the traction machine 35 drives the color strip optical fiber to move. The traction machine 35 pulls the color strip optical fiber to move on the above-mentioned coating mold, curing unit 27, upper positioning wheel 28, twisting wheel 29, lower positioning wheel 30, diameter gauge 31, compensation wheel 32, base 33, tension wheel 34.

[0072] The present application processes the optical fiber body 1 by setting a coating mold, coating the surface of the optical fiber body 1 with a side coating, an outer coating 3 and a color stripe layer 4, and setting the color stripe layer 4 in the color stripe groove 13. The evenly distributed color stripe layer 4 will not produce additional stress on the optical fiber, thus avoiding additional attenuation changes of the color stripe optical fiber. The production cost is low, the recognition is high, and the appearance recognition capacity is large. In extremely high or low temperature conditions, the optical fiber loss can be greatly reduced, avoiding the impact on the performance of optical fiber transmission.

[0073] The embodiment of the present application also solidifies the color strip optical fiber through the solidification unit 27, positions the color strip optical fiber through the guide wheel group, and the color strip optical fiber obtained after diameter measurement and compensation has uniform specifications, which is suitable for large-scale processing and production.

[0074] The present application also provides a method for preparing a color strip optical fiber, such as Figure 6 As shown, including:

[0075] Step S601: coating an inner coating and an outer coating on the optical fiber body in sequence through a coating mold.

[0076] Step S602: a color stripe groove is formed on the surface of the outer coating layer, and a color stripe layer is filled in the color stripe groove.

[0077] Step S603, curing the coated optical fiber by a curing unit.

[0078] Step S604, measuring and compensating the diameter of the cured optical fiber.

[0079] It should be noted that the information capacity of fiber-optic communication is increasing day by day. Whether it is traditional optical cable or OPGW optical cable, the number of cores in a single optical cable is getting larger and larger. Optical fibers with 144 cores, 288 cores, 576 cores and even more than a thousand cores are gradually becoming more commonly used, which provides higher requirements for optical fiber identification.

[0080] This type of optical fiber does not need to be colored during the processing of ordinary optical cables, and does not need to be sprayed with color rings during the production of OPGW cables. It can be coated and formed in one time, with high production efficiency. It adopts a triangular color strip injection method, and can provide four identification characteristics: single-color strip, double-color strip, three-color strip and no color strip according to the different colors of the coating resin used. By distinguishing the color of the resin, 12 basic optical cable color spectrum resins can be provided for distinction. Combined with the distinction of the number of color strips, 12*4 total 48 identification features can be provided. The embodiment of the present application has low production cost, high recognition, and large appearance recognition capacity.

[0081] Compared with the prior art, the embodiment of the present application reduces the process flow of optical cable processing. According to different optical cable application scenarios, the optical fiber coloring or color ring process can be skipped to enter the plastic coating process, thereby improving the production efficiency of color strip optical fiber. Through the unique color strip design method of triangular uniform structure, the optical fiber will not be affected by the stress generated by the color strip, and no additional attenuation changes will be generated, so that the environmental performance of the color strip optical fiber is better. The optical fiber identification capability is completed once in the optical fiber production process, which effectively reduces the processing procedures of the optical cable, improves the processing efficiency of the optical cable, and reduces the processing cost of the optical cable. Compared with the color ring identification, the color strip identification has better difference, stronger identification ability, and more prominent identification characteristics. The three-color strip structure, combined with the color difference of the color strip, can generate 48 appearance identification methods from the appearance characteristics of the optical fiber alone, and the appearance identification capacity is large. The existing optical fiber coloring has only 12 color changes. The research and development of color strip optical fiber can make the capacity of a single bundle tube of the optical cable no longer constrained by optical fiber identification and increase by 4 times, which provides the possibility of optimizing the optical cable structure, ensuring that the number of optical cable cores remains unchanged, reducing the optical cable structure, and reducing the production and manufacturing cost of the optical cable.

[0082] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0083] In addition, the terms "above" and "below" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "above" and "below" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0085] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0086] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A color stripe optical fiber, characterized in that: include: Optical fiber body; An inner coating, covering the surface of the optical fiber body; An outer coating layer, covering the surface of the inner coating layer, wherein the outer coating layer is provided with a plurality of color stripe grooves, and the plurality of color stripe grooves penetrate the outer coating layer along the length direction of the optical fiber body; The plurality of color stripe grooves are evenly distributed on the outer coating layer, so that the color stripe grooves are evenly stressed and no additional stress is generated on the optical fiber body; A plurality of color stripe layers are arranged in the plurality of color stripe grooves.

2. The color stripe optical fiber according to claim 1, characterized in that: The multiple color stripe slots have the same shape and size; Each color stripe groove has an opening, and a plurality of the openings are located on the surface of the outer coating layer.

3. The color stripe optical fiber according to claim 2, characterized in that: The cross-sectional profile of the color stripe groove is semicircular.

4. The color stripe optical fiber according to any one of claims 1 to 3, characterized in that: The number of the plurality of color stripe slots is 3.

5. The color stripe optical fiber according to any one of claims 1 to 3, characterized in that: The plurality of color stripe layers are formed by curing paint, and the paint forming the plurality of color stripe layers has the same color.

6. A coating mold, applied to the color stripe optical fiber according to any one of claims 1 to 5, characterized in that: It comprises an inner mold and a mold base, wherein the mold base has a cavity inside, and the inner mold is fixed in the cavity; The inner mold includes an introduction mold, an inner coating mold, an outer coating mold and a color stripe mold, the introduction mold, the inner coating mold, the outer coating mold and the color stripe mold are concentrically arranged, and the inner coating mold is sleeved on part of the introduction mold, the outer coating mold is sleeved on part of the inner coating mold, and the color stripe mold is sleeved on part of the outer coating mold; The inner coating mold is provided with an inner coating feed pipeline, the outer coating mold is provided with an outer coating feed pipeline, and the color stripe mold is provided with a color stripe layer feed pipeline.

7. The coating die according to claim 6, characterized in that: The die base comprises an introduction die base and a coating die base, and the introduction die base is fixedly connected to the coating die base; The introduction mold base is provided with a coating protection air channel, and the coating protection air channel is communicated with the cavity; The coating die base is provided with an inner coating feed pipe, an outer coating feed pipe and a color stripe layer feed pipe, the inner coating feed pipe is connected with the inner coating feed pipe, the outer coating feed pipe is connected with the outer coating feed pipe, and the color stripe layer feed pipe is connected with the color stripe layer feed pipe.

8. The coating die according to claim 7, characterized in that: The outer surface of the introduction mold base is provided with a coating protection airway interface, and the coating protection airway interface is communicated with the coating protection airway; The outer surface of the coating die base is provided with an inner coating supply pipeline interface, an outer coating supply pipeline interface and a color stripe layer supply pipeline interface, wherein the inner coating supply pipeline interface is connected to the inner coating supply pipeline, the outer coating supply pipeline interface is connected to the outer coating supply pipeline, and the color stripe layer supply pipeline interface is connected to the color stripe layer supply pipeline.

9. A coating device, characterized in that: Comprising the coating die according to any one of claims 7-8.

10. A method for preparing a color stripe optical fiber, applied to the color stripe optical fiber according to any one of claims 1 to 6, characterized in that: include: Sequentially coating the optical fiber body with an inner coating and an outer coating through a coating mold; A color stripe groove is formed on the surface of the outer coating layer, and a color stripe layer is filled in the color stripe groove; Curing the coated optical fiber by a curing unit; Measure diameter and compensate for cured optical fiber.

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