Microtube unit and optical cable

Abstract

The utility model discloses a microtubule unit and an optical cable, the microtubule unit comprises a protection main body and a plurality of optical fibers, the protection main body is a solid structure, the protection main body is internally provided with a plurality of first holes extending along the extension direction of the protection main body, and the plurality of optical fibers are assembled in the plurality of first holes in a one-to-one correspondence manner. The microtube unit is low in drawing-out connection difficulty, long in drawing-out connection length and not prone to being snapped in the drawing-out connection process.

Description

Technical Field

[0001] The utility model relates to the technical field of optical cables, in particular to a micro-tube unit and an optical cable that is easy to connect. Background Art

[0002] The spliced ​​optical cable is a new type of optical cable that can be quickly accessed and used in complex scenarios such as residences, shops, shopping malls, government and enterprises. It is often divided into indoor and outdoor types according to its structure. It is widely used due to its small size, flexible core number, convenient construction, and good flame retardancy.

[0003] The subunit of the spliced ​​optical cable is a microtube, which has the characteristics of customizable core number and easy stripping. In the process of introducing optical cables in residential and commercial scenes, the microtube can be pulled out from the spliced ​​optical cable by opening a skylight, and then the outer skin of the microtube can be stripped to perform the termination operation. However, the microtube in the prior art has problems such as high splicing difficulty, short splicing length, high splicing force, and easy to be pulled apart during the splicing process. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, the embodiment of the utility model provides a micro-tube unit, which has low splicing difficulty and long splicing length and is not easily broken during the splicing process.

[0006] The embodiment of the utility model further provides an optical cable including the above-mentioned micro-tube unit.

[0007] The microtube unit of the embodiment of the utility model includes a protective body and a plurality of optical fibers. The protective body is a solid structure. A plurality of first holes extending along the extension direction of the protective body are provided in the protective body. The plurality of optical fibers are assembled in the plurality of first holes in a one-to-one correspondence.

[0008] In some embodiments, the micro-tube unit includes a first reinforcing member, a second hole extending along an extending direction of the protective body is provided in the protective body, and the first reinforcing member is assembled in the second hole.

[0009] In some embodiments, there is only one second hole, and the plurality of first holes are all disposed on the circumferential sides of the plurality of first holes and are spaced apart along the circumference of the first holes.

[0010] In some embodiments, the first hole and the second hole are both circular holes.

[0011] In some embodiments, the second hole and the protective body are arranged concentrically.

[0012] In some embodiments, the number of the first holes and the optical fibers is 1 to 24.

[0013] The optical cable of the embodiment of the utility model comprises the micro-tube unit as described in any of the above embodiments.

[0014] In some embodiments, the optical cable comprises:

[0015] A sheath, wherein there are a plurality of micro-tube units, and the sheath is disposed on the outer peripheral side of the plurality of micro-tube units;

[0016] A water-blocking filler is filled in the sheath and distributed between the plurality of micro-tube units.

[0017] In some embodiments, the optical cable includes a second strength member, which is disposed in the sheath and extends along an extension direction of the sheath.

[0018] In some embodiments, a plurality of third holes are provided in the sheath, and the plurality of third holes are arranged at intervals along the circumference of the sheath. A plurality of second reinforcement members are provided, and the plurality of second reinforcement members are assembled in the plurality of third holes in a one-to-one correspondence.

[0019] Beneficial effect: The micro-tube unit and optical cable of the embodiment of the utility model can effectively solve the shortcomings of the traditional micro-tube splicing such as short splicing length and excessive splicing force, increase the tensile performance of the micro-tube unit, make the micro-tube unit not easily broken during the splicing process, and improve the operability of the splicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional schematic diagram of a microtube unit according to an embodiment of the present utility model.

[0021] Figure 2 It is a schematic cross-sectional view of an optical cable according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] Microtubule unit 10;

[0024] Protective body 11; first hole 111; second hole 112;

[0025] Optical fiber 12;

[0026] A first reinforcement member 13;

[0027] Sheath 20; third hole 21;

[0028] Water blocking filler 30;

[0029] The second reinforcement member 40 . DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0031] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0032] In the prior art, outdoor-type spliced ​​optical cables often require a certain degree of water-blocking properties. In addition to adding water-blocking yarns, water-blocking tapes and other water-blocking elements to the cable core, a small amount of fiber paste is added to the microtube to ensure the cross-section is water-blocking. This makes it easy for the microtube sheath and the optical fiber to displace during the splicing and extraction process, thereby increasing the friction when the optical fiber is spliced.

[0033] Secondly, since the micro-tubes of outdoor spliced ​​optical cables contain a small amount of fiber paste, the rigidity of the micro-tubes is reduced, which makes it easy for the micro-tubes to twist and tangle with each other in the cable core. Therefore, splicing is more difficult and the splicing length is shorter, which reduces the operability of splicing. For example, the splicing length of traditional spliced ​​optical cables is generally around 5m. For some scenarios with more curved paths and more complex wiring environments, the splicing force value will be greater, the splicing length will be shorter, and the micro-tube may even be easily broken.

[0034] Based on the above facts and problems, an embodiment of the present utility model proposes a micro-tube unit 10 .

[0035] like Figure 1 As shown, the microtube unit 10 of the embodiment of the utility model includes a protective body 11 and a plurality of optical fibers 12. The protective body 11 is a solid structure. A plurality of first holes 111 extending along the extension direction of the protective body 11 are provided in the protective body 11. The plurality of optical fibers 12 are assembled in the plurality of first holes 111 one by one.

[0036] Specifically, Figure 1 As shown, the cross section of the protection body 11 can be circular, the material of the protection body 11 can be low smoke halogen-free sheath material, or sheath material such as thermoplastic polyurethane elastomer, and the protection body 11 can be processed by one-time extrusion molding. The optical fiber 12 can be a colored optical fiber.

[0037] like Figure 1 As shown, four first holes 111 may be provided in the protective body 11 . In this case, the micro-tube unit 10 may also include four optical fibers 12 , and the four optical fibers 12 may be fixed in the four first holes 111 in a one-to-one correspondence.

[0038] In the micro-tube unit 10 of the embodiment of the utility model, the protective body 11 is a solid structure, and the optical fiber 12 is directly installed in the protective body 11. The protective body 11 and the optical fiber 12 are not easily displaced, thereby avoiding the situation in the prior art where fiber paste is arranged in the protective body 11, which makes the overall rigidity of the micro-tube unit 10 low, and also avoids the problem that the setting of the fiber paste easily causes the optical fiber 12 to be easily displaced during the splicing process, thereby extending the length of the micro-tube splicing, avoiding the disadvantage of a large splicing force value, and increasing the tensile strength of the micro-tube unit 10, so that the micro-tube unit 10 is not easily broken during the splicing process, thereby improving the operability of the splicing.

[0039] In some embodiments, the micro-tube unit 10 includes a first reinforcing member 13 , a second hole 112 extending along an extending direction of the protective body 11 is provided in the protective body 11 , and the first reinforcing member 13 is assembled in the second hole 112 .

[0040] For example, Figure 1 As shown, the first reinforcing member 13 may be a GFRP (glass fiber reinforced plastic) rod, the second hole 112 may be provided with only one and may be provided at the center of the protective body 11, and the first reinforcing member 13 may be fixed in the second hole 112. The provision of the first reinforcing member 13 may enhance the overall rigidity of the micro-tube unit 10.

[0041] In some embodiments, only one second hole 112 is provided, and the plurality of first holes 111 are provided on the circumferential sides of the plurality of first holes 111 and are arranged at intervals along the circumference of the first holes 111. Figure 1 As shown, the second hole 112 can be arranged at the center position of the protective body 11, and the number of the first holes 111 can be four. The four first holes 111 can be arranged at equal intervals along the circumference of the second hole 112. Thereby, the balance of the distribution of the optical fiber 12 can be enhanced, and the first reinforcement member 13 is located at the center position to fully ensure the consistency of rigidity in all directions.

[0042] In some embodiments, the first hole 111 and the second hole 112 are both circular holes.

[0043] In some embodiments, the second hole 112 is arranged concentrically with the protective body 11. Figure 1 As shown, the second hole 112 can be a circular hole, the cross-section of the protective body 11 can also be circular, and the central axis of the second hole 112 and the central axis of the protective body 11 can be arranged colinearly, thereby ensuring the symmetry and consistency of the structure in all directions.

[0044] In some embodiments, the number of the first holes 111 and the optical fibers 12 is 1 to 24. For example, the number of the optical fibers 12 can be 3, 5, 6, 8, 10, 15, 20, 24, etc., and the number of the optical fibers 12 can be flexibly adjusted according to environmental factors.

[0045] The optical cable of the embodiment of the utility model is described below.

[0046] The optical cable of the embodiment of the utility model comprises a micro-tube unit, and the micro-tube unit may be the micro-tube unit 10 described in any of the above embodiments.

[0047] In some embodiments, the optical cable includes a sheath 20 and a water-blocking filler 30 . There are multiple micro-tube units 10 . The sheath 20 is sleeved on the outer circumference of the multiple micro-tube units 10 . The water-blocking filler 30 is filled in the sheath 20 and distributed between the multiple micro-tube units 10 .

[0048] For example, Figure 2 As shown, the cross section of the sheath 20 can be generally annular, and six micro-tube units 10 can be provided. In some other embodiments, the micro-tube units 10 can be provided in 3, 4, 5, 7, etc. The six micro-tube units 10 are all inserted into the inner hole of the sheath 20, and the six micro-tube units 10 are arranged in parallel.

[0049] The material of the water-blocking filler 30 is a water-blocking material, which can be specifically filling yarn, water-blocking yarn, aramid, glass yarn, etc. The water-blocking filler 30 is filled in the sheath 20, and any two adjacent micro-tube units 10 can be filled with the water-blocking filler 30. The setting of the water-blocking filler 30 can, on the one hand, fill the excess space in the sheath 20, thereby ensuring the stability of the distribution of the optical fiber 12, and on the other hand, can play a water-blocking effect.

[0050] In some embodiments, the optical cable includes a second strength member 40, which is disposed in the jacket 20 and extends along the extension direction of the jacket 20. Figure 2 As shown, the second reinforcement member 40 may be inserted into the sheath 20, and the second reinforcement member 40 may also be a GFRP (glass fiber reinforced plastic) rod. The provision of the second reinforcement member 40 may enhance the overall rigidity of the optical cable.

[0051] In some embodiments, a plurality of third holes 21 are provided in the sheath 20 , and the plurality of third holes 21 are arranged at intervals along the circumference of the sheath 20 . A plurality of second reinforcement members 40 are provided, and the plurality of second reinforcement members 40 are assembled in the plurality of third holes 21 in a one-to-one correspondence.

[0052] For example, Figure 2 As shown, two third holes 21 may be provided, both of which may be circular holes, and the two third holes 21 may be arranged relatively to each other in the radial direction of the sheath 20, and two second reinforcement members 40 may also be provided, and the two second reinforcement members 40 may be respectively fixed in the two third holes 21, thereby achieving symmetry and balance in enhancing the rigidity of the optical cable.

[0053] A specific example of the optical cable of the present invention is described below.

[0054] like Figure 2 As shown, the easy-to-connect optical cable of the embodiment of the utility model includes: a sheath 20, a water-blocking material (equivalent to the above-mentioned water-blocking filler 30), a first GFRP rod (equivalent to the above-mentioned second reinforcement member 40) and a micro-tube unit 10, and the water-blocking material can be filling yarn, water-blocking yarn, aramid or glass yarn.

[0055] Among them, the structure of the microtube unit 10 is as above Figure 1 As shown, the micro-tube unit 10 may include: a colored optical fiber, a second GFRP rod (equivalent to the first reinforcement member 13) and a micro-tube sheath (equivalent to the protective body 11). The micro-tube sheath is a solid rod-shaped structure that can lock the colored optical fiber and the second GFRP rod. The micro-tube sheath and the colored optical fiber are not easily displaced, and the integrity of the micro-tube unit 10 is better.

[0056] The outer skin of the micro-tube is extruded and molded in one step during the production process. The material used is low-smoke halogen-free sheath material, or it can be a sheath material such as thermoplastic polyurethane elastomer. The number of cores of colored optical fiber is generally 1 to 24, and the number of cores can be flexibly adjusted according to factors such as the use environment. The outer skin of the micro-tube is filled with GFRP rods to form a tight structure.

[0057] The micro-tube unit of the optical cable of the utility model has the following advantages over the previous loose structure micro-tube unit:

[0058] 1) The structure of the utility model is conducive to reducing the friction between the micro-tube units, optimizing the digging performance, and effectively increasing the digging operation length. After field simulation tests, the digging length can be increased from the original 5m to more than 10m.

[0059] 2) The outer skin of the microtube of the solid rod-shaped structure of the utility model has higher tensile strength and more rigidity, and it is not easy to break the colored optical fiber during the splicing operation.

[0060] 3) The outer skin of the microtube of the utility model is a solid rod-shaped structure, and no additional fiber paste is needed, which plays a good role in preventing water seepage and is more environmentally friendly; and when the end is made, there is no need to remove the fiber paste, which makes the operation more convenient.

[0061] 4) The microtube outer skin of the utility model is filled with thin GFRP rods, which significantly enhances the rigidity of the microtube unit.

[0062] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A microtubule unit, characterized in that: It comprises a protective body and a plurality of optical fibers, wherein the protective body is a solid structure, a plurality of first holes extending along the extending direction of the protective body are arranged in the protective body, and the plurality of optical fibers are assembled in the plurality of first holes in a one-to-one correspondence.

2. The microtube unit according to claim 1, characterized in that It comprises a first reinforcement piece, a second hole extending along the extension direction of the protection body is arranged in the protection body, and the first reinforcement piece is assembled in the second hole.

3. The microtube unit according to claim 2, characterized in that There is only one second hole, and the plurality of first holes are all arranged on the circumferential sides of the plurality of first holes and are spaced apart along the circumferential direction of the first holes.

4. The microtube unit according to claim 2, characterized in that The first hole and the second hole are both circular holes.

5. The microtube unit according to claim 2, characterized in that: The second hole and the protection body are arranged concentrically.

6. The microtubule unit according to any one of claims 1 to 5, characterized in that: The number of the first holes and the optical fibers is 1 to 24.

7. An optical cable, characterized in that: The method comprises the microtubule unit according to any one of claims 1 to 6.

8. The optical cable according to claim 7, characterized in that include: A sheath, wherein there are a plurality of micro-tube units, and the sheath is disposed on the outer peripheral side of the plurality of micro-tube units; A water-blocking filler is filled in the sheath and distributed between the plurality of micro-tube units.

9. The optical cable according to claim 8, characterized in that A second reinforcement member is included, and the second reinforcement member is arranged in the sheath and extends along the extension direction of the sheath.

10. The optical cable according to claim 9, characterized in that A plurality of third holes are provided in the sheath, and the plurality of third holes are arranged at intervals along the circumference of the sheath. A plurality of second reinforcement members are provided, and the plurality of second reinforcement members are assembled in the plurality of third holes in a one-to-one correspondence.

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