Easily-stripped and easily-pulled-out optical cable

Abstract

The utility model discloses an easy-to-strip and easy-to-pick optical cable, which comprises a flame-retardant outer sheath, a tensile element, an optical unit and a color-changing strip assembly, and is characterized in that the flame-retardant outer sheath is internally provided with an optical unit cavity, so that the optical cable is hollow; the tensile elements are embedded in the outer sheath and are located at two sides of the optical unit cavity. The optical unit is accommodated in the optical unit cavity; by embedding the tensile element in the flame-retardant outer sheath, sufficient tensile stress can be provided for the easy-to-strip and easy-to-pick optical cable, and it is ensured that an optical unit is not stressed in the laying process of the optical cable, so that damage to the optical unit caused by weak tensile performance of the optical cable is avoided; the color-changing strip assembly is arranged on the outer side wall of the outer sheath, so that a constructor can quickly identify a stripping point, the operation difficulty of the constructor is reduced, and the construction efficiency of optical cable laying is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber communication, and particularly relates to an optical cable that is easy to strip and easy to splice. Background Art

[0002] With the construction of gigabit networks in the 5G era, as well as the increasing construction of new infrastructure, smart cities, and smart buildings, operators' network construction for these scenarios, especially the network deployment after the secondary optical splitter, requires more diverse optical cable core numbers.

[0003] In smart cities and smart buildings, the end-users are dense, the network layout is more complex, the space for optical cable laying is limited, and the maintenance cost is high. Operators' demand for optical cables that are easy to maintain, easy to strip, and easy to splice increases. Moreover, the existing optical cables have weak tensile properties, are prone to damaging the microducts and optical fibers during the laying process, and it is rather troublesome to find the stripping points during the stripping and splicing processes, increasing the operation difficulty for construction workers and affecting the construction efficiency of optical cable laying.

[0004] Therefore, how to provide an optical cable that is easy to strip and easy to splice to avoid weak tensile properties of the optical cable and low efficiency in finding the stripping points is a technical problem that those skilled in the art need to solve currently. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an optical cable that is easy to strip and easy to splice to avoid weak tensile properties of the optical cable, avoid low efficiency in finding the stripping points, and improve the construction efficiency of optical cable laying.

[0006] To achieve the above purpose, the utility model provides an optical cable that is easy to strip and easy to splice, including:

[0007] A flame-retardant outer sheath, with an optical unit cavity inside, making the optical cable hollow;

[0008] Tensile elements, embedded on the outer sheath, and the tensile elements are located on both sides of the optical unit cavity;

[0009] An optical unit, housed in the optical unit cavity;

[0010] A color-changing strip assembly, arranged on the outer sidewall of the outer sheath.

[0011] Preferably, there are two groups of color-changing strip assemblies, and each color-changing strip assembly includes two color-changing strips arranged at intervals.

[0012] Preferably, there is a window guiding mark between two adjacent color-changing strips in the same group of color-changing strip assemblies.

[0013] Preferably, the color-changing strip is a semi-embedded wedge-shaped structure. The cross-section of the color-changing strip perpendicular to its own extension direction is a sector. The two straight edges of the sector are attached to the outer sheath, and the two ends of the arc edge of the sector are connected to the outer edge of the outer sheath, so that the outer edge of the cross-section of the outer sheath perpendicular to its own extension direction is circular.

[0014] Preferably, the inner edge of the cross-section of the outer sheath perpendicular to its own extension direction is oval, and the straight line where the short axis of the inner edge of the outer sheath is located passes through the tensile element. The two sets of color-changing strip assemblies are located at both ends in the long axis direction of the inner edge of the outer sheath.

[0015] Preferably, the optical unit includes a plurality of microbeam tubes, and a plurality of colored optical fibers are provided in each microbeam tube.

[0016] Preferably, the ratio of the sum of the outer edge areas of the cross-sections of all the microbeam tubes perpendicular to their own extension directions to the inner edge area of the cross-section of the outer sheath perpendicular to its own extension direction is less than 6:10;

[0017] The ratio of the sum of the outer edge areas of the cross-sections of all the colored optical fibers in the same microbeam tube perpendicular to their own extension directions to the inner edge area of the cross-section of the microbeam tube perpendicular to its own extension direction is less than 7:10.

[0018] Preferably, the flame-retardant material used for the outer sheath is an anti-ultraviolet low-smoke halogen-free polyolefin material, and the tensile element is an aramid fiber-reinforced fiberglass round rod.

[0019] Preferably, the color-changing strip is made of flame-retardant high-density polyethylene material, and force-induced color-changing material particles are uniformly provided in the color-changing strip, so that the color-changing strip changes color when subjected to a preset pressure or torsional force.

[0020] Compared with the above background art, the easily peelable and spliceable optical cable provided by the present utility model includes a flame-retardant outer sheath, a tensile element, an optical unit, and a color-changing strip assembly. A light unit cavity is provided inside the flame-retardant outer sheath to make the optical cable hollow; the tensile element is embedded on the outer sheath, and the tensile element is located on both sides of the light unit cavity; the optical unit is accommodated in the light unit cavity; the color-changing strip assembly is arranged on the outer side wall of the outer sheath.

[0021] Specifically, by embedding the tensile element inside the flame-retardant outer sheath, sufficient tensile stress can be provided for the easily peelable and spliceable optical cable, ensuring that the optical unit is not stressed during the laying process of the optical cable to avoid damage to the optical unit due to the weak tensile performance of the optical cable. By arranging the color-changing strip assembly on the outer side wall of the outer sheath, it is convenient for construction personnel to quickly identify the peeling point, reducing the operation difficulty of construction personnel and improving the construction efficiency of optical cable laying. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the provided drawings.

[0023] Figure 1 It is a schematic structural diagram of an easily peelable and easily accessible optical cable provided by an embodiment of the present invention.

[0024] Wherein:

[0025] 100 - outer sheath, 110 - optical unit cavity;

[0026] 200 - tensile element;

[0027] 300 - optical unit, 310 - microduct, 320 - colored optical fiber;

[0028] 400 - color-changing strip;

[0029] 500 - windowing guide. Detailed implementation manners

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0031] To enable those skilled in the art of this technology to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0033] The purpose of the present invention is to provide an easily peelable and easily accessible optical cable to avoid weak tensile performance of the optical cable, avoid low efficiency in finding the peeling point, and improve the construction efficiency of optical cable laying.

[0034] Please refer to Figure 1, To achieve the above object, the present utility model provides an easily strippable and easily spliced optical cable, which includes a flame-retardant outer sheath 100, a tensile member 200, an optical unit 300, and a color-changing strip assembly.

[0035] A light unit cavity 110 is provided inside the flame-retardant outer sheath 100 to make the optical cable hollow; wherein, the flame-retardant material of the outer sheath 100 is at least provided on the outermost outer layer of the outer sheath 100, and the flame-retardant material is an anti-ultraviolet low-smoke and halogen-free polyolefin material. The self-extinguishing property and low-smoke property of the low-smoke and halogen-free material are used to achieve the flame retardancy of the optical cable, increase the anti-ultraviolet performance of the outer sheath 100, improve the anti-ultraviolet aging performance of the optical cable, and extend the service life of the optical cable.

[0036] The tensile member 200 is embedded on the outer sheath 100, and the tensile member 200 is located on both sides of the light unit cavity 110; an aramid fiber-reinforced fiberglass round bar is used as the tensile member 200, which has a high modulus and strength, provides sufficient tensile stress for the easily strippable and easily spliced optical cable, and ensures that the optical unit 300 accommodated in the light unit cavity 110 is not stressed and not damaged during the laying process of the optical cable.

[0037] The color-changing strip assembly is arranged on the outer side wall of the outer sheath 100, and the color-changing strip assembly can be used as an identifier for the stripping point, which is convenient for construction personnel to quickly identify the stripping point.

[0038] By embedding the tensile member 200 inside the flame-retardant outer sheath 100, sufficient tensile stress can be provided for the easily strippable and easily spliced optical cable, ensuring that the optical unit 300 is not stressed during the laying process of the optical cable to avoid damage to the optical unit 300 due to weak tensile performance of the optical cable. By arranging the color-changing strip assembly on the outer side wall of the outer sheath 100, it is convenient for construction personnel to quickly identify the stripping point, reduces the operation difficulty of construction personnel, and improves the construction efficiency of optical cable laying.

[0039] It can be understood that there are two groups of color-changing strip assemblies, and each color-changing strip assembly includes two color-changing strips 400 arranged at intervals. The inner edge of the cross-section of the outer sheath 100 perpendicular to its own extension direction is oval, and the straight line where the short axis of the inner edge of the outer sheath 100 is located passes through the tensile member 200. The two groups of color-changing strip assemblies are located at both ends in the long axis direction of the inner edge of the outer sheath 100.

[0040] By arranging the two groups of color-changing strip assemblies at both ends in the long axis direction of the inner edge of the outer sheath 100, the thickness of the outer sheath 100 at the color-changing strip assembly is relatively thin, reducing the stripping difficulty of the optical cable and facilitating the subsequent stripping and splicing of the optical cable.

[0041] There is a window opening guide 500 between two adjacent color changing strips 400 of the same group of color changing strip assemblies. The color changing strip 400 is a semi-embedded wedge-shaped structure. The color changing strip 400 is made of flame-retardant high-density polyethylene material, and force-induced color changing material particles are evenly arranged in the color changing strip 400 to make the color changing strip 400 blue, and when the color changing strip 400 is subjected to a preset pressure or torsional force, it turns cyan. The window opening guide 500 can be achieved by different colors of the color changing strip 400 and the outer sheath 100, and can also be achieved by setting a mark.

[0042] It can be understood that a wedge-shaped color-changing strip 400 is used, and the color-changing strip 400 uses a color-changing flame-retardant material. By adding force-induced color-changing material particles to the color-changing flame-retardant material, the nano-level color-changing material is evenly distributed in the flame-retardant high-density polyethylene material, so that the flame-retardant high-density polyethylene material is naturally blue. The material is extruded at low temperature through a single screw to form a blue wedge-shaped color-changing strip 400 on the outer surface of the outer sheath 100.

[0043] When subjected to greater pressure or high torsion, the color-changing strip 400 will change from blue to cyan. In the actual laying process, when the bending radius of the optical cable is less than ten times the diameter of the optical cable, the wedge-shaped color-changing strip 400 will be subjected to greater stress. During the splicing construction process, when the splicing is performed, the wedge-shaped color-changing strip 400 is subjected to greater force, and the force-induced color-changing particles in the material change color due to the force, causing the wedge-shaped color-changing strip 400 to change from blue to cyan. The color-changing strip 400 allows construction workers to easily find paths with bending radii exceeding the limit during the laying of optical cables, optimize the line layout in a timely manner, reduce the frequency of later network maintenance, and save construction costs.

[0044] Furthermore, the cross-section of the color changing strip 400 perpendicular to its own extension direction is fan-shaped, the two straight sides of the fan-shaped are fitted to the outer sheath 100, and the two ends of the arc edge of the fan-shaped are connected to the outer edge of the outer sheath 100, so that the outer edge of the cross-section of the outer sheath 100 perpendicular to its own extension direction is circular.

[0045] The structure of a white flame retardant outer sheath plus a blue wedge-shaped color-changing strip 400 is adopted, and two extruders are used to synchronously extrude the white outer sheath and the blue wedge-shaped color-changing strip 400. The white and blue color make it easy to strip, dig and identify the optical cable.

[0046] The blue wedge is embedded deep into the outer sheath, and the wedge-shaped color-changing strip 400 contacts the white outer sheath of the optical cable with two triangular surfaces, which enables better perception of the torsional and bending forces of the optical cable, thereby achieving color change under stress.

[0047] The color of the color-changing strip 400 is distinguished from the color of the outer edge of the outer sheath 100 , so that window opening guides 500 are formed between the color-changing strips 400 in the same group of color-changing strip assemblies.

[0048] Quick stripping can be achieved between two color-changing strips 400 in the same group of color-changing strip components by a stripping knife. The ratio of the sum of the outer edge areas of the cross-sections perpendicular to their own extension directions of all the microbeam tubes 310 to the inner edge area of the cross-section perpendicular to its own extension direction of the outer sheath 100 is less than 6:10, so that the optical cable has an internal duty ratio of more than 40% (the duty ratio here is the ratio of the remaining space in the optical unit cavity 110 to the total space of the optical unit cavity 110). The microbeam tubes 310 will not be damaged during the stripping process, and the relatively high duty ratio provides sufficient space for splicing for the construction personnel.

[0049] The optical unit 300 includes a number of microbeam tubes 310. The outer walls of all the microbeam tubes 310 are set with different colors, and a number of colored optical fibers 320 are arranged in each microbeam tube 310.

[0050] It is easy to distinguish the microbeam tubes 310 with twelve chromatograms. According to different usage functions, the construction personnel can achieve quick splicing construction. Stripping and splicing are carried out along with the wedge-shaped color strips, making the optical cable easy to strip and splice, and improving the construction efficiency.

[0051] The ratio of the sum of the outer edge areas of the cross-sections perpendicular to their own extension directions of all the colored optical fibers 320 in the same microbeam tube 310 to the inner edge area of the cross-section perpendicular to its own extension direction of the microbeam tube 310 is less than 7:10.

[0052] In this embodiment, the colored optical fibers 320 are restricted inside the microbeam tubes 310. The microbeam tubes 310 adopt a structure with an outer diameter of 1.0 mm ± 0.05 mm. The duty ratio of the microbeam tubes 310 is greater than 30% to provide sufficient space for the optical fibers (the duty ratio here refers to the ratio of the remaining space in the microbeam tube 310 to the total space of the microbeam tube 310), so that the colored optical fibers 320 can freely extend in the microbeam tubes 310, making the colored optical fibers 320 not stressed during the laying process of the optical cable and ensuring the quality of the optical cable.

[0053] The processing technological process of the above optical cable is as follows: colored optical fiber 320, secondary sheathing (microduct 310), tensile member 200, extrusion coating of low-smoke halogen-free flame-retardant material, finished optical cable. When the colored optical fiber 320 is secondarily coated into the microduct 310, the fiber threading and wire laying tension of the optical fiber need to be strictly controlled, and the concentricity of the die without adjustment needs to be confirmed to ensure the stability of the outer diameter and wall thickness of the microduct 310. The microduct 310 is produced with a diameter of 1.0 mm ± 0.05 mm. The take-up of the microduct 310 uses wheel traction to reduce the relative position slip between the optical fiber and the outer sheath 100. During the production process, ensure that the take-up tension is controlled within the range of 1 N, so that the microduct 310 does not strip during the production process, ensuring the production quality of the microduct 310. In the one-time cabling process of the tensile member 200, the microduct 310, and the flame-retardant outer sheath 100, the microduct 310 is actively payed off. Through the concentric beam-forming die with the tensile member 200, parallel cable cores are formed and respectively enter the easily peelable and easily accessible optical cable outer sheath die. Two extruders are used for synchronous extrusion. With a pull-tube die core and die sleeve, through a unique runner design, the white outer sheath and the blue wedge-shaped color-changing strip 400 are synchronously extruded to form an easily peelable, easily identifiable, and easily accessible flame-retardant outer sheath layer.

[0054] In summary, the easily peelable and easily accessible optical cable provided by the present application includes a high-flame-retardant outer sheath 100, a blue color-changing strip 400, a microduct 310, and an aramid fiber tensile member 200. The optical cable is a fully non-metallic structure, with the characteristics of a smaller outer diameter and lighter weight of the optical cable. The anti-ultraviolet low-smoke halogen-free polyolefin is used as the flame-retardant material of the outer sheath 100, which has the characteristics of high flame retardancy and anti-ultraviolet. Using an aramid fiber-reinforced fiberglass round rod as the tensile member 200 provides sufficient tensile stress for the optical cable and has good flexibility at the same time; the force-induced color-changing characteristic of the wedge-shaped color-changing strip 400 enables the optical cable to have the characteristics of being easily identifiable and easily peelable, and the wedge-shaped blue color-changing strip 400 can provide guidance on the window size, reducing the operation difficulty of construction personnel and improving the construction efficiency of optical cable laying; corresponding to the microducts 310 of twelve colors inside the peeled optical cable, according to the color spectrum, it can be peeled and accessed according to different household entry requirements, reducing the repeated laying of optical cables and improving the construction efficiency of optical cable laying and connection. At the same time, a larger duty cycle is adopted inside the optical cable, providing excellent mechanical properties for the optical cable, and the additional attenuation approaches "zero" under the condition of the same 500 N tensile force.

[0055] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same and similar parts among the embodiments, reference can be made to each other.

[0056] In this article, specific examples are used to elaborate on the principle and implementation of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

Claims

1. An optical cable that is easy to strip and connect, characterized in that: include: A flame-retardant outer sheath (100) is provided with an optical unit cavity (110) inside so that the optical cable is hollow; A tensile element (200) is embedded in the outer sheath (100), and the tensile element (200) is located on both sides of the optical unit cavity (110); A light unit (300) housed in the light unit cavity (110); A color changing strip assembly is arranged on the outer side wall of the outer sheath (100).

2. The easy-to-strip and easy-to-connect optical cable according to claim 1, characterized in that: The color changing strip components are divided into two groups, and each of the color changing strip components comprises two color changing strips (400) arranged at an interval.

3. The easy-to-strip and easy-to-connect optical cable according to claim 2, characterized in that: There is a window opening guide (500) between two adjacent color-changing strips (400) of the same group of color-changing strip assemblies.

4. The easy-to-strip and easy-to-connect optical cable according to claim 2, characterized in that: The color changing strip (400) is a semi-embedded wedge-shaped structure, and the cross section of the color changing strip (400) perpendicular to its own extension direction is fan-shaped, two straight sides of the fan-shaped are fitted to the outer sheath (100), and the two ends of the arc edge of the fan-shaped are connected to the outer edge of the outer sheath (100), so that the outer edge of the cross section of the outer sheath (100) perpendicular to its own extension direction is circular.

5. The easy-to-strip and easy-to-connect optical cable according to claim 2, characterized in that: The inner edge of the cross section of the outer sheath (100) perpendicular to its own extension direction is elliptical, the straight line where the short axis of the inner edge of the outer sheath (100) is located passes through the tensile element (200), and the two groups of the color change strip assemblies are located at both ends of the inner edge of the outer sheath (100) in the long axis direction.

6. The easy-to-strip and easy-to-connect optical cable according to claim 1, characterized in that: The optical unit (300) comprises a plurality of micro-beam tubes (310), each of which is provided with a plurality of colored optical fibers (320).

7. The easy-to-strip and easy-to-connect optical cable according to claim 6, characterized in that: The ratio of the sum of the outer edge areas of the cross sections of all the microtubes (310) perpendicular to their own extension direction to the inner edge area of ​​the cross section of the outer sheath (100) perpendicular to its own extension direction is less than 6:10; The ratio of the sum of the outer edge areas of the cross sections of all the colored optical fibers (320) in the same micro-tube (310) perpendicular to their own extension direction to the inner edge area of ​​the cross section of the micro-tube (310) perpendicular to its own extension direction is less than 7:

10.

8. The easy-to-strip and easy-to-connect optical cable according to any one of claims 1 to 7, characterized in that: The flame retardant material used in the outer sheath (100) is an ultraviolet-resistant low-smoke halogen-free polyolefin material, and the tensile element (200) is an aramid fiber-reinforced glass fiber reinforced round rod.

9. The easy-to-strip and easy-to-connect optical cable according to any one of claims 1 to 7, characterized in that: The color changing strip (400) is made of flame retardant high-density polyethylene material, and mechanochromic material particles are evenly arranged in the color changing strip (400), so that the color changing strip (400) changes color when subjected to a preset pressure or torsional force.

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