Air-blowing optical fiber and preparation device thereof

Abstract

The utility model discloses an air-blowing optical fiber and a preparation device thereof, and belongs to the technical field of optical fiber manufacturing and processing, a compensation wheel is rotatably connected with a base through a shaft rod, and a rotatable tension wheel is arranged on the surface of a traction machine. The laying efficiency of the air-blowing optical fiber is effectively improved; the blowing distance is longer, and the construction cost is reduced; after a single optical fiber breaks down, the faulted optical fiber can be replaced or replaced in a mode of directionally replacing the single optical fiber, so that the maintenance cost is lower; the special structural design is not limited to a conventional G.652. D single-mode communication optical fiber, other single-mode optical fibers such as G.653. A2 and G.654. E and multimode optical fibers such as OM1 and OM2 can be produced, different types of optical fibers can be blown in at any time for replacement or supplement, the upgrading and replacement cost is low, and the efficiency is high; according to the original triangular air groove flow guide structure, the flow guide air grooves are geometrically and uniformly distributed, additional stress is not generated, and additional influence on the transmission performance of the optical fiber is not generated.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber manufacturing and processing, and more specifically, to a blowable optical fiber and a preparation device thereof. Background Art

[0002] With the rapid development of information networks and the growth of data traffic, the construction and laying requirements of optical fiber cables are increasing day by day. Optical fiber cables are usually laid in pipelines. With the increase in the demand quantity, more pipelines are needed to carry them. However, the construction period of pipeline construction generally takes more than two years; the construction difficulty is great, and the new pipe network must avoid the existing laid pipelines; the construction and laying have a wide influence range, high investment, and great coordination difficulty.

[0003] At present, two methods of blowing optical cables and blowing optical fibers are mainly adopted to reduce the volume of optical fiber cables, improve the laying density of optical fibers, utilize the existing pipeline resources to increase the communication capacity of optical fiber cables, and improve the construction efficiency of the new pipe network and greatly reduce the construction investment.

[0004] The principle of blowing optical cables mainly involves using a high-pressure air flow blowing method to blow the optical cable into a pre-buried silicon core pipe. This process is realized by a cable blowing machine. The machine blows high-pressure and high-speed compressed air into the silicon core pipe. The high-pressure air flow pushes the air seal piston, thereby forming a settable uniform pulling force on the optical cable. At the same time, the hydraulic crawler conveying mechanism of the cable blowing machine clamps the optical cable and conveys it forward to form a conveying force. The combined action of the pulling force and the conveying force enables the inserted optical cable to quickly pass through the pipeline in a suspended state along with the high-speed air flow.

[0005] The principle of the blowable optical fiber system is similar. It uses compressed air to blow the optical fiber into the micro-pipes in the building. This method has flexibility that cannot be compared with traditional optical fiber systems. By using micro-pipes with different diameters, different blowing distances can be achieved. The minimum bending radius of a single micro-pipe in the indoor environment is also clearly specified, ensuring the effective laying of the optical fiber.

[0006] However, whether it is the method of blowing optical cables or blowing optical fibers, there are certain structural defects. Affected by the optical cable structure, although the structural size and weight of the optical cable are reduced compared with ordinary optical cables, the occupied pipeline space is still large. Affected by the optical fiber structure, the construction difficulty of blowing optical fibers is great, and the blowing laying distance is limited. Therefore, the traditional optical cable laying method is limited by factors such as time, cost, and project scale, and it is difficult to meet the growing demand for network replacement construction. With the change of actual demand, it is often necessary to re-construct and lay pipes, resulting in high construction costs and great difficulty.

[0007] Based on this, we have developed an air-blown optical fiber and its preparation device for the air-blown optical fiber laying method to improve the disadvantage of short laying distance in optical fiber air-blowing laying, to improve the utilization rate of optical cable pipelines, to reduce the cost of optical fiber laying and the destructive impact of new pipelines on the original laying lines, which can effectively solve the problems of difficult construction and high maintenance costs, and provide more beneficial solutions for the construction of information networks. Utility Model Content

[0008] In view of the problems existing in the prior art, the purpose of the utility model is to provide an air-blown optical fiber and a preparation device thereof, which adopts a unique spiral air groove structure design to effectively improve the laying efficiency of the air-blown optical fiber; the blowing distance is longer, and the construction cost is reduced; after a single optical fiber fails, the faulty optical fiber can be replaced or replaced by directional replacement of the single optical fiber, and the maintenance cost is lower; the proprietary structural design is not limited to conventional G.652.D single-mode communication optical fiber, and other single-mode optical fibers such as G.657.A2, G.654.E and multi-mode optical fibers such as OM1 and OM2 can also be produced, and different types of optical fibers can be blown in at any time for replacement or supplementation, with low upgrade and replacement costs and high efficiency; the original triangular air groove guide structure, the guide air groove is geometrically evenly distributed, will not generate additional stress, and will not have additional impact on the optical fiber transmission performance.

[0009] To solve the above problems, the utility model adopts the following technical solutions.

[0010] A device for preparing air-blown optical fiber comprises a coating die seat, an air-blown optical fiber coating die, a curing unit, an upper positioning wheel, a twisting wheel, a lower positioning wheel, a diameter gauge, a compensation wheel and a traction machine, wherein the compensation wheel is rotatably connected to a base via an axle rod, a rotatable tension wheel is arranged on the surface of the traction machine, the air-blown optical fiber coating die is composed of an introduction die, an inner coating die, an outer coating die and a guide layer coating die, the air-blown optical fiber coating die is arranged in the coating die seat, a die seat introduction die is arranged inside the coating die seat above the air-blown optical fiber coating die, the surface of the coating die seat is arranged with an inner coating feed pipeline interface, an outer coating feed pipeline interface and a guide layer coating feed pipeline interface in sequence from top to bottom, and a unique screw thread is adopted. The spiral air groove structural design effectively improves the laying efficiency of air-blown optical fiber; the blowing distance is longer, reducing construction costs; when a single optical fiber fails, the faulty optical fiber can be replaced or replaced by directional replacement of the single optical fiber, with lower maintenance costs; the proprietary structural design is not limited to conventional G.652.D single-mode communication optical fiber, but can also produce other single-mode optical fibers such as G.657.A2, G.654.E and multi-mode optical fibers such as OM1 and OM2, and different types of optical fibers can be blown in at any time for replacement or supplementation, with low upgrade and replacement costs and high efficiency; the original triangular air groove guide structure, the guide air groove is geometrically evenly distributed, will not generate additional stress, and will not have additional impact on the optical fiber transmission performance.

[0011] Further, the inlet die, inner coating die, outer coating die, and flow guide layer coating die are connected and fixed from top to bottom by die fastening screws. Screw holes are provided on the surfaces of the inlet die, inner coating die, outer coating die, and flow guide layer coating die, which is not only convenient for production and assembly but also for later individual disassembly and replacement.

[0012] Further, the flow guide layer coating die is provided with a flow guide layer coating feed hole and a flow guide layer coating die hole. A flow guide layer coating hole is provided inside the flow guide layer coating die hole, and three evenly distributed special-shaped bumps are provided in the flow guide layer coating hole. The flow guide layer coating die hole is convenient for the flow guide layer coating material to be coated.

[0013] Further, the inlet die is provided with a circular inlet die hole, the inner coating die is provided with an inner coating feed hole and a circular inner coating die hole, and the outer coating die is provided with an outer coating feed hole and a circular outer coating die hole.

[0014] Further, one end of the inner coating supply pipeline interface is communicated with the inner coating feed hole, and one end of the outer coating supply pipeline interface is communicated with the outer coating feed hole, which is convenient for the inner coating material and the outer coating material to enter the air-blowing optical fiber coating die.

[0015] Further, the surface of the coating die base is provided with a coating protective gas pipeline interface, and a low-viscosity protective gas pipeline is provided at one end of the coating protective gas pipeline interface, which is convenient for introducing a protective gas with lower viscosity during work to remove bubbles in the coating and maintain the stability of the coating process.

[0016] Further, the number of the special-shaped bumps is three, and they are evenly distributed in a ring with the center of the flow guide layer coating hole as the center of the circle. The special-shaped bumps are convenient for forming special-shaped air-blowing flow guide grooves on the surface of the optical fiber flow guide layer.

[0017] Further, one end of the flow guide layer coating supply pipeline interface is communicated with the flow guide layer coating feed hole, which is convenient for the flow guide layer coating material to enter the air-blowing optical fiber coating die.

[0018] The air-blowable optical fiber prepared by the air-blowable optical fiber preparation device of the present invention includes an air-blowable optical fiber body. The air-blowable optical fiber body is composed of a bare optical fiber, an optical fiber inner coating, an optical fiber outer coating, and an optical fiber flow guide layer. Three evenly distributed special-shaped air-blowing flow guide grooves are provided on the surface of the optical fiber flow guide layer. This structural design can effectively improve the air-blowing speed and construction length of the air-blowable optical fiber body during construction.

[0019] Further, the cross-section of the air-blowing flow guide groove has an upper-narrow and lower-wide structure, and this upper-narrow and lower-wide structural design can effectively avoid damage to the optical fiber air-blowing groove.

[0020] Compared with the prior art, the advantages of the present invention are as follows:

[0021] (1) The unique spiral air groove structure design effectively improves the laying efficiency of air-blown optical fiber.

[0022] (2) The blowing distance is longer, which reduces the construction cost.

[0023] (3) When a single optical fiber fails, the faulty optical fiber can be replaced or substituted by directional replacement of the single optical fiber, which reduces maintenance costs.

[0024] (4) The proprietary structural design is not limited to conventional G.652.D single-mode communication optical fiber. It can also produce other single-mode optical fibers such as G.657.A2, G.654.E, and multi-mode optical fibers such as OM1 and OM2. When the constructed optical fiber changes with the actual trial needs, different types of optical fibers can be blown in at any time to replace or supplement it, avoiding damage to the existing network caused by re-construction. The upgrade and replacement cost is low and the efficiency is high.

[0025] (5) The unique triangular air groove guide structure has uniform geometric distribution of the guide grooves, which will not generate additional stress and will not have additional impact on the optical fiber transmission performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall explosion structure of the utility model;

[0027] Figure 2 This is a cross-sectional view of the air-blown optical fiber of the utility model;

[0028] Figure 3 This is a three-dimensional diagram of the coating die base structure of the utility model;

[0029] Figure 4 for Figure 3 A cross-sectional view of the coating die base structure;

[0030] Figure 5 for Figure 4 A three-dimensional diagram of the air-blown optical fiber coating mold structure;

[0031] Figure 6 for Figure 5 A cross-sectional view of the air-blown optical fiber coating mold structure;

[0032] Figure 7 for Figure 5 A partial enlarged view of the air-blown optical fiber coating mold;

[0033] Figure 8 for Figure 6 Exploded diagram of the air-blown optical fiber coating mold structure.

[0034] Description of the numbers in the figure:

[0035] 1 Bare optical fiber, 2 Inner coating of optical fiber, 3 Outer coating of optical fiber, 4 Fiber flow guiding layer, 5 Air blowing flow guiding groove, 6 Introducing die, 6 Introducing die, 7 Inner coating die, 8 Outer coating die, 9 Flow guiding layer coating die, 10 Introducing die hole, 11 Inner coating die hole, 12 Outer coating die hole, 13 Flow guiding layer coating die hole, 15 Air blowing optical fiber coating die, 16 Inner coating feed hole, 17 Outer coating feed hole, 18 Flow guiding layer coating feed hole, 19 Die fastening screw, 20 Flow guiding layer coating hole, 21 Coating die base, 22 Inner coating feeding pipeline interface, 23 Outer coating feeding pipeline interface, 24 Flow guiding layer coating feeding pipeline interface, 25 Die base introducing die, 26 Coating protective gas pipeline interface, 27 Air blowable optical fiber body, 28 Curing unit, 29 Upper positioning wheel, 30 Twisting wheel, 31 Lower positioning wheel, 32 Diameter measuring instrument, 33 Compensation wheel, 34 Base, 35 Tension wheel, 36 Tractor. Detailed implementation mode

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1

[0038] Please refer to Figures 1-8, a gas-blown optical fiber preparation device, including a coating die holder 21, a gas-blown optical fiber coating die 15, a curing unit 28, an upper positioning wheel 29, a twisting wheel 30, a lower positioning wheel 31, a diameter gauge 32, a compensating wheel 33 and a tractor 36. The curing unit 28, the upper positioning wheel 29, the twisting wheel 30, the lower positioning wheel 31, the diameter gauge 32, the compensating wheel 33 and the tractor 36 are prior arts and are used for the production of optical fibers. Their constituent structures and working principles are well-known to those skilled in the art and will not be described in detail here. The compensating wheel 33 is rotationally connected to a base 34 through a shaft rod. The surface of the tractor 36 is provided with a rotatable tension wheel 35. The gas-blown optical fiber coating die 15 is composed of an inlet die 6, an inner coating die 7, an outer coating die 8 and a flow guide layer coating die 9. The inlet die 6 is provided with a circular inlet die hole 10. The inner coating die 7 is provided with an inner coating feed hole 16 and a circular inner coating die hole 11. One end of the inner coating supply pipe interface 22 is communicated with the inner coating feed hole 16. One end of the outer coating supply pipe interface 23 is communicated with the outer coating feed hole 17, facilitating the entry of the inner coating material and the outer coating material into the gas-blown optical fiber coating die 15. The outer coating die 8 is provided with an outer coating feed hole 17 and a circular outer coating die hole 12. The gas-blown optical fiber coating die 15 is arranged in the coating die holder 21. Inside the coating die holder 21 and above the gas-blown optical fiber coating die 15, there is a die holder inlet die 25. The surface of the coating die holder 21 is successively provided with an inner coating supply pipe interface 22, an outer coating supply pipe interface 23 and a flow guide layer coating supply pipe interface 24 from top to bottom. The inner coating supply pipe interface 22, the outer coating supply pipe interface 23 and the flow guide layer coating supply pipe interface 24 facilitate the supply of the coating materials. The surface of the coating die holder 21 is provided with a coating protective gas pipe interface 26. One end of the coating protective gas pipe interface 26 is provided with a low-viscosity protective gas delivery pipe, facilitating the introduction of a low-viscosity protective gas during operation to remove the bubbles in the coating and maintain the stability of the coating process.

[0039] The inlet die 6, the inner coating die 7, the outer coating die 8 and the flow guide layer coating die 9 are connected and fixed from top to bottom through die fastening screws 19. The surfaces of the inlet die 6, the inner coating die 7, the outer coating die 8 and the flow guide layer coating die 9 are all provided with screw holes, which not only facilitate production and assembly but also facilitate later separate disassembly and replacement. The flow guide layer coating die 9 is provided with a flow guide layer coating feed hole 18 and a flow guide layer coating die hole 13. Inside the flow guide layer coating die hole 13, there is a flow guide layer coating hole 20, and there are three evenly distributed special-shaped convex points in the flow guide layer coating hole 20. The flow guide layer coating die hole 13 facilitates the coating of the flow guide layer coating material. The number of the special-shaped convex points is three, and they are annularly and equally spaced with the center of the flow guide layer coating hole 20 as the center. The special-shaped convex points facilitate the formation of special-shaped gas-blown flow guide grooves 5 on the surface of the optical fiber flow guide layer 4. One end of the flow guide layer coating supply pipe interface 24 is communicated with the flow guide layer coating feed hole 18, facilitating the entry of the flow guide layer coating material into the gas-blown optical fiber coating die 15.

[0040] The utility model is an air-blowing optical fiber prepared by an air-blowing optical fiber preparation device, comprising an air-blowing optical fiber body 27, the air-blowing optical fiber body 27 is composed of a bare optical fiber 1, an optical fiber inner coating 2, an optical fiber outer coating 3 and an optical fiber guide layer 4, and the surface of the optical fiber guide layer 4 is provided with three evenly distributed special-shaped air-blowing guide grooves 5. This structural design can effectively improve the air-blowing speed and construction length during the construction of the air-blowing optical fiber body 27. The cross-section of the air-blowing guide groove 5 is a narrow-upper and wide-lower structure, and the narrow-upper and wide-lower structural design can effectively avoid damage to the optical fiber air-blowing groove.

[0041] When the present scheme is implemented, the bare optical fiber 1 is pulled by the pulling machine 36, and the bare optical fiber 1 passes through the mold base introduction mold 25, the introduction mold hole 10, the inner coating mold hole 11, the outer coating mold hole 12 and the guide layer coating mold hole 13 in sequence. When the bare optical fiber 1 passes through the inner coating mold hole 11, an inner layer of resin is attached to the surface of the bare optical fiber 1, and the end face of the optical fiber is circular at this time. When passing through the outer coating mold hole 12, an outer layer of resin is attached to the surface, and then an air-blown optical fiber body 27 is formed on the surface of the optical fiber through the guide layer coating mold hole 13. The optical fiber guide layer 4 of the air-blown optical fiber body 27 presents three evenly distributed special-shaped notched air-blown guide grooves 5. After being coated by the air-blown optical fiber coating mold 15, it becomes an air-blown optical fiber. After being light-cured by the curing unit 28, it passes through the upper positioning wheel 29, the twisting wheel 30, the lower positioning wheel 31, the diameter gauge 32 and the compensation wheel 33 installed on the base 34 in sequence, and finally passes through The traction machine 36 is used to collect the fibers. This solution has the advantages of high construction efficiency: the unique spiral structure design makes the blowing efficiency higher and the blowing distance longer during the construction and laying of air-blown optical fiber; the construction is flexible and efficient: the air-blown optical fiber can be blown in as an independent construction unit, with a small structural size, small mass, high construction fiber density, good flexibility and low cost; beneficial performance: the structural size is small, the mass is small, the fiber density is high and the weather resistance is good; good bending performance; strong versatility: the structural design is not limited to G.652.D single-mode optical fiber, but is also applicable to other single-mode optical fibers such as G.657.A2 and G.654.E and multi-mode optical fibers such as OM1 and OM2; low maintenance and upgrade costs: after the project construction is completed, different types of optical fibers can be directly replaced or added in the existing pipeline according to the data network construction needs to meet actual needs, without the need to repeat the pipeline construction.

[0042] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A device for preparing an air-blown optical fiber, comprising a coating die holder (21), an air-blown optical fiber coating die (15), a curing unit (28), an upper positioning wheel (29), a twisting wheel (30), a lower positioning wheel (31), a diameter gauge (32), a compensation wheel (33) and a tractor (36), characterized in that: The compensation wheel (33) is rotatably connected to the base (34) via an axle rod; a rotatable tension wheel (35) is arranged on the surface of the traction machine (36); the air-blown optical fiber coating mold (15) is composed of an introduction mold (6), an inner coating mold (7), an outer coating mold (8) and a guide layer coating mold (9); the air-blown optical fiber coating mold (15) is arranged in a coating mold base (21); a mold base introduction mold (25) is arranged inside the coating mold base (21) above the air-blown optical fiber coating mold (15); and the surface of the coating mold base (21) is sequentially provided with an inner coating supply pipeline interface (22), an outer coating supply pipeline interface (23) and a guide layer coating supply pipeline interface (24) from top to bottom.

2. The air-blown optical fiber preparation device according to claim 1, characterized in that: The introduction mold (6), the inner coating mold (7), the outer coating mold (8) and the guide layer coating mold (9) are connected and fixed from top to bottom by mold fastening screws (19), and the surfaces of the introduction mold (6), the inner coating mold (7), the outer coating mold (8) and the guide layer coating mold (9) are all provided with screw holes.

3. The air-blown optical fiber preparation device according to claim 1, characterized in that: The guide layer coating die (9) is provided with a guide layer coating feed hole (18) and a guide layer coating die hole (13), the guide layer coating die hole (13) is provided with a guide layer coating hole (20) inside, and a special-shaped convex point is provided inside the guide layer coating hole (20).

4. The air-blown optical fiber preparation device according to claim 1, characterized in that: The introduction die (6) is provided with a perfect circular introduction die hole (10), the inner coating die (7) is provided with an inner coating feed hole (16) and a perfect circular inner coating die hole (11), and the outer coating die (8) is provided with an outer coating feed hole (17) and a perfect circular outer coating die hole (12).

5. The air-blown optical fiber preparation device according to claim 4, characterized in that: One end of the inner coating material supply pipeline interface (22) is connected to the inner coating material supply hole (16), and one end of the outer coating material supply pipeline interface (23) is connected to the outer coating material supply hole (17).

6. The air-blown optical fiber preparation device according to claim 1, characterized in that: A coating protective gas pipeline interface (26) is provided on the surface of the coating die base (21), and a low-viscosity protective gas delivery pipe is provided at one end of the coating protective gas pipeline interface (26).

7. The air-blown optical fiber preparation device according to claim 3, characterized in that: The number of the special-shaped protrusions is three, and they are distributed in a circular shape with equal spacing, taking the center of the coating hole (20) of the guide layer as the center of the circle.

8. The device for preparing an air-blown optical fiber according to claim 3, characterized in that: One end of the guide layer coating supply pipeline interface (24) is connected to the guide layer coating feed hole (18).

9. An air-blowable optical fiber prepared by an air-blowable optical fiber preparation device according to any one of claims 1 to 8, comprising an air-blowable optical fiber body (27), characterized in that: The air-blowing optical fiber body (27) is composed of a bare optical fiber (1), an optical fiber inner coating (2), an optical fiber outer coating (3) and an optical fiber guide layer (4), and the surface of the optical fiber guide layer (4) is provided with three evenly distributed special-shaped air-blowing guide grooves (5).

10. The air-blown optical fiber prepared by the air-blown optical fiber preparation device according to claim 9, characterized in that: The cross section of the air blowing guide groove (5) is a structure that is narrow at the top and wide at the bottom.

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