CN212989723U

CN212989723U - From area guide cable formula air-blowing type 288 core OPGW optical cable

Info

Publication number: CN212989723U
Application number: CN202022253983.3U
Authority: CN
Inventors: 鞠久军; 段宏峰; 刘洋; 高克成; 万冰; 夏建军
Original assignee: Far East Communications Ltd
Current assignee: Far East Communications Ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-04-16
Anticipated expiration: 2030-10-12

Abstract

The utility model discloses a self-guiding cable type air-blowing 288-core OPGW optical cable, which comprises an optical unit, an aluminum pipe and an outer protective layer which are arranged from inside to outside; the optical unit comprises a central reinforcing piece, an optical fiber, a loose tube, a water-blocking layer and an outer sheath; the central reinforcing piece is positioned at the center of the light unit, and a plurality of loose tubes are stranded on the outer side of the central reinforcing piece; a plurality of optical fibers are arranged on the inner side of the loose tube, and a gap between each optical fiber and the loose tube is filled with hydrogen absorption fiber paste; the outer side of the loose tube is coated with a water-resistant layer, and the outer side of the water-resistant layer is coated with an outer sheath; and a conductive aluminum pipe is arranged on the outer side of the light unit, and an outer protective layer is arranged on the outer side of the aluminum pipe. The utility model discloses use the aluminum pipe as the electrically conductive unit of optical cable, separately produce light unit and electrically conductive unit, reduce the production risk, reduced the external diameter and the unit weight that the optical cable arrived, reduce cost.

Description

From area guide cable formula air-blowing type 288 core OPGW optical cable

Technical Field

The utility model belongs to the technical field of the optical cable, concretely relates to from 288 cores OPGW optical cable of leading cable formula air-blowing.

Background

The OPGW optical cable is arranged on the top of an overhead tower in an electric power system, is used for lightning protection and communication functions of an electric power circuit, can be laid along a highway or a river together with a wire, is high in intensive degree, meets the requirement of long-distance optical fiber communication, has the characteristics of high reliability and high maintenance efficiency, and provides higher requirements for the communication capacity and reliability of the OPGW optical cable due to rapid development of the ultra-high voltage transmission technology in China in recent years.

OPGW optical cable structure is various, mainly has stainless steel tubular and aluminium package PBT tubular, and current OPGW optical cable has following defect: (1) at present, 288-core OPGW optical cables on the market only use a three-layer stainless steel 7-tube structure, stainless steel tubes are distributed in two layers, the processing cost and risk of the stainless steel tubes are extremely high, 288-core OPGW can be scrapped due to unstable tension of one stranded pay-off wire, the minimum outer diameter is about 23mm, the unit weight is 1.5t, and the optical cables can be inserted only by using corresponding 288-core nonmetal guide cables for welding, the special joint box is expensive, and the welding wastes time and labor;

(2) traditional aluminium package PBT tubular OPGW optical cable, it forms to use ordinary PBT sleeve pipe SZ transposition, the sleeve pipe size is big, be subject to OPGW and aluminum pipe size's restriction, ordinary aluminium package PBT pipe OPGW on the existing market all uses single-layer PBT pipe layer transposition, it is 144 cores to hold optic fibre quantity at most, the external diameter just reaches 9mm behind the PBT sleeve pipe transposition, and there is not the sheath, need do thermal-insulated protection, the external diameter of cable is very big behind the outer cladding aluminum pipe, make final OPGW optical cable finished product's external diameter and unit weight very big, lose the cost advantage.

(3) The production process of the traditional aluminum-clad PBT tubular OPGW optical cable comprises the steps of manufacturing a PBT sleeve, SZ stranding and binding yarn, winding a polyimide film to form a PBT cable core, coating a layer of aluminum pipe on the outer side, and stranding an aluminum-clad steel wire or aluminum alloy wire armor layer on the outer layer; because the liquid aluminum is high in temperature and speed and has a large risk in the aluminum tube coating process, production accidents such as cable core scrapping and the like caused by scalding the PBT cable core and breaking the aluminum tube can occur, and the loss is extremely high;

(4) traditional aluminium package PBT tubular OPGW optical cable, at the aluminum pipe cladding in-process, there is certain unwrapping wire tension in the PBT cable core and because the aluminum pipe extrusion process speed is unstable, and tension can't stabilize accurate control, because do not have aramid fiber to strengthen and protective sheath, leads to PBT cable core optic fibre extra length to be eaten away, causes OPGW optical cable tensile properties to reduce or even unqualified.

Therefore, the above technical defects are technical problems which are urgently needed to be solved.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims to provide a from taking guide cable formula air-blowing type 288 core OPGW optical cable to prior art not enough.

Realize the technical scheme of the utility model is that:

the utility model relates to a self-guiding cable type air-blowing 288-core OPGW optical cable, which comprises an optical unit, an aluminum pipe and an outer protective layer which are arranged from inside to outside; the optical unit comprises a central reinforcing piece, an optical fiber, a loose tube, a water-blocking layer and an outer sheath; the central reinforcing piece is positioned at the center of the light unit, and a plurality of loose tubes are stranded on the outer side of the central reinforcing piece; a plurality of optical fibers are arranged on the inner side of the loose tube, and a gap between each optical fiber and the loose tube is filled with hydrogen absorption fiber paste; the outer side of the loose tube is coated with a water-resistant layer, and the outer side of the water-resistant layer is coated with an outer sheath; and a conductive aluminum pipe is arranged on the outer side of the light unit, and an outer protective layer is arranged on the outer side of the aluminum pipe.

The utility model discloses preferred technical scheme does, the utility model provides a light unit is air-blowing type light unit, for an air-blowing type micro optical cable, the external diameter of light unit is 5mm ~ 8mm, and it has the light unit of length 500m in the terminal reservation of optical cable, and the light unit of reservation can directly regard as the inbound use of guide optical cable, reduces the secondary loss that the butt fusion process led to the fact for the optical cable, can facilitate the use air-blowing method and lay at a high speed, convenient operation, reduce cost. The optical fiber is G652D or G657 small diameter optical fiber.

Preferably, the loose tubes are 1.2mm diameter loose tubes, each of which accommodates a maximum of 12-core optical fiber, and the remaining length of the optical fiber in the loose tube is 0.05%.

Preferably, two loose tubes are twisted outside the central strength member, the inner loose tube includes 9 groups of loose tubes twisted on the outer surface of the central strength member, the outer loose tube includes 15 groups of loose tubes twisted on the outer surface of the inner loose tube, and the optical unit includes 288-core optical fibers at most. The utility model provides a light unit uses full medium non-metallic structure, can satisfy the biggest 288 core fiber communication functions.

Preferably, the aluminum pipe is a seamless airtight aluminum pipe, the optical unit is arranged in the aluminum pipe in a penetrating mode, one or more layers of outer protective layers of aluminum-clad steel wires and/or aluminum-clad gold wires are spirally stranded on the outer layer of the aluminum pipe, the aluminum pipe and the outer protective layers form a conductive unit of the optical cable together, and double protection is conducted on the optical unit.

Preferably, the aluminum pipe is made of an aluminum rod through high-temperature extrusion, shaping, cooling and drawing, the thickness of the pipe wall is 0.5-2 mm, the outer diameter of the aluminum pipe ranges from 10mm to 15mm, the inner side surface and the outer side surface of the aluminum pipe are smooth and seamless, the inner diameter of the aluminum pipe is larger than the outer diameter of the pipe penetrating light unit, further, the inner diameter of the aluminum pipe is 3mm larger than the outer diameter of the pipe penetrating light unit, and the light unit can penetrate through the aluminum pipe quickly.

Preferably, a loose tube or a loose tube and filling rope combination layer is stranded on the outer side SZ of the central reinforcement, the stranding pitch is 100mm, the loose tube is a full-color spectrum PBT micro-tube, and the filling rope is a PP filling rope with the same diameter as the loose tube.

Preferably, a 3220Dtex waterproof aramid yarn waterproof layer is wrapped outside the loose tube in the optical unit, and the waterproof aramid yarn is an imported high-modulus material and internally contains water-absorbing particles, so that the tensile resistance and the waterproof performance of the optical unit are guaranteed. The water blocking layer is coated with an outer sheath which is made of an environment-friendly low-smoke halogen-free material with the thickness of 0.4mm, the outer sheath has flame retardant performance and can reduce friction, so that the air-blowing type light unit is smooth in the construction of passing through the aluminum pipe. The outer diameter of the outer sheath is 5 mm-8 mm, the outer diameter of the outer sheath is half of that of a traditional layer-twisted PBT optical unit, and the outer diameter of the optical unit is greatly reduced under the condition that the requirement of the number of optical fiber cores is met, so that the outer diameter and the unit weight of the optical cable are reduced.

Preferably, the central reinforcing member adopts a GFRP central reinforcing member with the elastic modulus of 70 GPa; the arrangement of the central reinforcing part improves the tensile strength and toughness of the light unit, so that the air-blowing type light unit pipe penetrating construction process is smoother.

By adopting the technical scheme, the utility model discloses following beneficial effect has:

(1) the utility model provides an optical unit directly penetrates the intraductal optical cable that constitutes of electrically conductive unit aluminium of optical cable, such structural design can reduce the external diameter and the unit weight of optical cable by a wide margin, reduction in production cost.

(2) The utility model discloses in the terminal reservation of optical cable have the optical unit of length 500m, the optical unit of reservation can directly regard as the inbound use of guide optical cable, reduces the secondary loss that the butt fusion process led to the fact for the optical cable, can facilitate the use air-blowing method and lay convenient operation, reduce cost at a high speed.

(3) The utility model provides an optic fibre adopts G652D or G657 minor diameter optic fibre, the biggest optic fibre that holds 12 cores in every loose sleeve the utility model provides a loose sleeve pipe can set up two-layer loose sleeve pipe at the utmost, 24 loose sleeve pipes of group altogether, makes the optical unit the biggest including 288 core optic fibre, and the optical unit uses full-medium non-metallic structure, can satisfy the biggest 288 core fiber communication function.

(4) The aluminum tubes of the optical unit and the conductive unit in the utility model can be produced separately, thus reducing the production risk; the production accidents and losses such as cable core scrapping caused by scalding of the PBT cable core and breakage of the aluminum pipe due to high temperature and high speed of liquid aluminum in the aluminum pipe coating process are avoided, and scrapped products are reduced, so that the production cost is saved, and green and environment-friendly production is realized.

(5) Compared with the traditional optical cable, the combination of the aluminum pipe and the air blowing type optical unit in the utility model can not only meet the containing capacity of 288 core optical fibers, but also greatly reduce the outer diameter and the unit weight of the optical cable; under the condition that the outer diameter of the optical cable is reduced, the metal usage amount of the outer layer material of the optical cable is also reduced, so that the production cost is greatly reduced.

(6) The utility model discloses in need use under the less condition of fiber core number, can replace loose sleeve pipe for the packing rope to guarantee the roundness of optical cable and the practical application demand of optical cable.

(7) The utility model provides a central reinforcement adopts elastic modulus to be 70 GPa's GFRP center reinforcement, can not only improve the tensile strength and the toughness of optical unit, can also be more smooth and easy passing the aluminum pipe work progress at air-blowing type optical unit.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of an OPGW optical cable according to the present invention;

fig. 2 is a schematic structural view of the air-blowing type light unit according to the present invention;

fig. 3 is a side view of the OPGW optical cable of the present invention.

In the figure, 1-light unit, 11-central reinforcing member, 12-loose tube, 13-optical fiber, 14-hydrogen-absorbing fiber paste, 15-water-resistant layer, 16-outer sheath, 2-aluminum tube, and 3-outer sheath.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.

Example (b): a self-guiding cable type air-blowing 288 core OPGW optical cable is shown in figure 1, and comprises an optical unit 1, an aluminum pipe 2 and an outer protective layer 3 which are arranged from inside to outside; as shown in fig. 2, the optical unit 1 in this embodiment is an air-blowing optical unit 1, which is an air-blowing micro-optical cable, and the optical unit 1 includes a central strength member 11, an optical fiber 13, a loose tube 12, a water blocking layer 15, and an outer sheath 16; the outer diameter of the optical unit 1 is 5 mm-8 mm, the optical unit 1 with the length of 500m is reserved at the tail end of the optical cable, the reserved optical unit 1 can be directly used for guiding the optical cable to enter, secondary loss caused by the optical cable in the fusion process is reduced, high-speed laying by using an air blowing method can be facilitated, operation is convenient, and cost is reduced.

The central reinforcing member 11 in the present embodiment is a GFRP central reinforcing member 11 having an elastic modulus of 70GPa and a diameter of 2.4 mm; the arrangement of the central reinforcing part 11 improves the tensile strength and toughness of the light unit 1, so that the pipe penetrating construction process of the air-blowing type light unit 1 is smoother; the central reinforcing part 11 is positioned at the center of the light unit 1, and a plurality of loose tubes 12 are twisted outside the central reinforcing part 11; a plurality of optical fibers 13 are arranged on the inner side of the loose tube 12, the optical fibers 13 are G652D or G657 small-diameter optical fibers, and a gap between each optical fiber 13 and the loose tube 12 is filled with hydrogen absorption fiber paste 14; the loose tubes 12 in the embodiment are loose tubes 12 with the diameter of 1.2mm, 12 cores of G652D or G657 optical fibers with the small size of 200 microns are contained in each loose tube 12 to the maximum extent, the paying-off tension of the optical fibers 13 must be accurately controlled to be 50 +/-5G, the taking-up tension of the loose tubes is controlled to be within 300G, and the residual length of the optical fibers 13 in the loose tubes 12 is 0.05 percent under the condition that the water temperature is controlled to be 40-45 ℃; in the embodiment, two layers of loose tubes are stranded on the outer side SZ of the central reinforcement member 11, the inner layer loose tube comprises 9 groups of loose tubes 12 which are stranded on the outer surface of the central reinforcement member 11, the outer layer loose tube comprises 15 groups of loose tubes 12 which are stranded on the outer surface of the inner layer loose tube 12, the optical unit 1 maximally comprises 288 core optical fibers 13, and the loose tubes 12 all adopt full-color PBT microtubes; the loose tube in the embodiment is twisted once by adopting a structure of 1+9+15, and the twisting pitch of the loose tube 12 is 100 mm; the optical unit 1 in this embodiment uses an all-dielectric non-metal structure, and can satisfy the communication function of the maximum 288-core optical fiber 13.

The diameter of the loose tube 12 in this embodiment is less than half of the diameter of a normal PBT tube; in practical application, when the optical cable with the optical fibers with the multiple cores is not needed, the filling ropes and the loose tubes with the same diameter as the loose tubes can be applied to be stranded on the same layer so as to ensure the roundness of the optical cable, wherein the filling ropes are made of PP (polypropylene) filling ropes.

In this embodiment, the outer side of the loose tube 12 is wrapped with the water blocking layer 15 made of 3220Dtex water-blocking aramid yarn, and the water-blocking aramid yarn is an imported high-modulus material and contains water-absorbing particles, so that the tensile resistance and the water-blocking performance of the optical unit 1 are guaranteed. An outer sheath 16 is coated outside the waterproof layer 15; the outer sheath 16 is preferably an environment-friendly low-smoke halogen-free outer sheath with a thickness of 0.4mm, the outer sheath 16 is produced in an extruded tube mode, the outer sheath 16 has flame retardant performance and can reduce friction force, and the air-blowing type light unit 1 is smooth in construction of penetrating through the aluminum tube 2. According to the number of layers of optical units twisted according to the loose tube, the outer diameter of the outer sheath 16 is 5-8 mm, is half of the traditional layer-twisted PBT optical unit 1, and greatly reduces the outer diameter of the optical unit 1 under the condition of meeting the requirement of the number of cores of the optical fibers 13, so that the outer diameter and the unit weight of the optical cable are reduced.

In the embodiment, a conductive aluminum pipe 2 is arranged outside the light unit 1, the light unit 1 is arranged in the aluminum pipe 2 in a penetrating manner, and an outer protective layer 3 is arranged outside the aluminum pipe 2; the aluminum pipe 2 is preferably a seamless airtight aluminum pipe, one or more layers of outer protective layers 3 of aluminum-clad steel wires and/or aluminum-clad gold wires are spirally stranded on the outer layer of the aluminum pipe 2, the aluminum pipe 2 and the outer protective layers 3 form a conductive unit of the optical cable together and carry out double protection on the optical unit 1, and the outer protective layers 3 can also be used as armor protective layers. The aluminum pipe 2 in the embodiment is made by high-purity aluminum rods through high-temperature extrusion, shaping, cooling and drawing, the thickness of the pipe wall is 0.5 mm-2 mm, the outer diameter range of the aluminum pipe 2 is 10 mm-15 mm, the inner and outer side surfaces of the aluminum pipe 2 are smooth and seamless, and the inner diameter of the aluminum pipe is larger than the outer diameter of the pipe penetrating optical unit 1; the inner diameter of the aluminum tube 2 is 3mm larger than the outer diameter of the tube penetrating light unit 1, so that the light unit 1 can rapidly penetrate through the aluminum tube 2.

In the embodiment, the OPGW optical cable guides the air-blowing type optical unit 1 into the seamless airtight aluminum tube of the conductive unit of the optical cable in an air-blowing mode, the pressure set by an air compressor is 0.4-0.6 Mpa, 500m is reserved at the tail end of the optical cable by the air-blowing type optical unit 1, the optical cable can be directly used as a guide optical cable, and the secondary loss of the optical cable caused by a welding process is reduced; the optical fiber cable is laid at high speed by using an air blowing method, the tension of the air blowing type optical unit 1 in the aluminum pipe is uniform, various performance indexes after the optical fiber cable is laid are reliably guaranteed, the operation is convenient, and the production and maintenance cost is greatly reduced. The inner diameter of the aluminum pipe 2 in the embodiment is preferably 11mm, the pipe wall thickness is 1.2mm, the outer diameter of the air-blowing type optical unit 1 is 8mm, 288 cores of optical fibers are accommodated in the optical unit, 16 aluminum-clad steel wires with the diameter of 2.9mm are stranded on the outer layer, the outer diameter of the OPGW optical cable is only 19mm, the unit weight is only 1t, and the cost is far lower than that of the OPGW optical cable with the structure of 288 cores and three-layer stainless steel 7 pipes on the market at present. The outer diameter of the traditional 144-core air-blowing micro-optical cable is about 5.6mm, the outer diameter of the 288-core air-blowing optical unit 1 in the embodiment only reaches 8mm, and is reduced by half compared with the traditional PBT pipe cable core, the metal usage amount of the corresponding outer layer material is reduced by 40%, and the production cost is greatly reduced. The air-blowing type optical unit of the conductive unit aluminum pipe of the optical cable and the optical fiber communication unit in the embodiment is separately produced, so that the instability of the paying-off tension and speed of the existing PBT pipe in the aluminum pipe coating process is effectively avoided, aramid fiber reinforcement and a protective sleeve are not provided, the extra length of the existing PBT cable core optical fiber is eaten, the phenomenon that the tensile property of the existing OPGW optical cable is reduced and even unqualified is caused, and the production safety coefficient of the optical cable in the embodiment is high.

The air-blowing type optical unit 1 in this embodiment can also be introduced by a method of directly coating and extruding the aluminum tube 2, the gap between the aluminum tube 2 and the air-blowing type optical unit is 0.45mm, 500m is reserved at the head end of the air-blowing type optical unit coated by the aluminum tube 2, a cable type transition mode is adopted at the tail end of the OPGW optical cable, as shown in fig. 3, 3m is reserved in the aluminum tube 2, and the step-by-step transition of the OPGW optical cable-aluminum tube-air-blowing type optical unit is realized.

The OPGW optical cable in the embodiment utilizes an air blowing pipeline construction principle, the aluminum pipe 2 and the air blowing type optical unit 1 are used for replacing a traditional stainless steel pipe or PBT pipe optical unit, the outer diameter and the unit weight of the OPGW optical cable are greatly reduced under the condition of meeting the containing amount of 288 core optical fibers, the production of the air blowing type optical unit 1 and the aluminum pipe of a conductive unit can be separately produced in the production process, the production risk is reduced, the air blowing type optical unit 1 is led into the seamless airtight aluminum pipe 2 of the conductive unit in an air blowing mode, the air blowing type optical unit is reserved for 500m at the tail end of the OPGW optical cable, the OPGW optical cable can be directly used as a guide optical cable, the secondary loss of the optical cable caused by the welding process is reduced, the OPGW optical cable is laid at a high speed, the.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A self-guiding cable type air-blowing 288 core OPGW optical cable is characterized by comprising an optical unit, an aluminum pipe and an outer protective layer which are arranged from inside to outside; the optical unit comprises a central reinforcing piece, an optical fiber, a loose tube, a water-blocking layer and an outer sheath; the central reinforcing piece is positioned at the center of the light unit, and a plurality of loose tubes are stranded on the outer side of the central reinforcing piece; a plurality of optical fibers are arranged on the inner side of the loose tube, and a gap between each optical fiber and the loose tube is filled with hydrogen absorption fiber paste; the outer side of the loose tube is coated with a water-resistant layer, and the outer side of the water-resistant layer is coated with an outer sheath; and a conductive aluminum pipe is arranged on the outer side of the light unit, and an outer protective layer is arranged on the outer side of the aluminum pipe.

2. The self-leaded cable air-blown 288-core OPGW optical cable according to claim 1, wherein the outer diameter of the optical unit is 5 mm-8 mm, a length of 500m of optical unit is reserved at the end of the optical cable, and the optical fiber is G652D or G657 small diameter optical fiber.

3. The self-leaded cable air-blown 288-core OPGW optical cable of claim 2, wherein the loose tubes are 1.2mm diameter loose tubes each accommodating a maximum of 12-core optical fibers, and the optical fibers have a residual length of 0.05% in the loose tubes.

4. The self-leaded cable-type air-blown 288-core OPGW optical cable of claim 3, wherein two loose tubes are twisted on the outer side of the central strength member, the inner loose tube comprises 9 groups of loose tubes twisted on the outer surface of the central strength member, the outer loose tube comprises 15 groups of loose tubes twisted on the outer surface of the inner loose tube, and the optical unit comprises 288-core optical fibers at most.

5. The self-leaded cable air-blown 288-core OPGW optical cable of claim 1, wherein the aluminum tube is a seamless airtight aluminum tube, the optical unit is inserted into the aluminum tube, and the outer layer of the aluminum tube is helically stranded with one or more layers of outer sheath of aluminum-clad steel wire and/or aluminum-clad gold wire.

6. The self-leaded cable type air-blown 288 OPGW optical cable of claim 5, wherein the aluminum tube is made of an aluminum rod by high temperature extrusion, shaping, cooling and drawing, the tube wall thickness is 0.5 mm-2 mm, the outer diameter of the aluminum tube ranges from 10 mm-15 mm, the inner and outer side surfaces of the aluminum tube are smooth and seamless, and the inner diameter of the aluminum tube is larger than the outer diameter of the tube penetrating optical unit.

7. The self-guiding cable type air-blowing 288-core OPGW optical cable as claimed in claim 1, wherein a loose tube or a combination of a loose tube and a filling rope is stranded at a stranding pitch of 100mm on the outside SZ of the central strength member, the loose tube is a full-color spectrum PBT micro-tube, and the filling rope is a PP filling rope having a diameter equal to that of the loose tube.

8. The self-guide cable type air-blowing 288-core OPGW optical cable according to claim 1, wherein a water-blocking layer of 3220Dtex water-blocking aramid yarn is wrapped outside a loose tube in the optical unit, an outer sheath made of environment-friendly low-smoke halogen-free material is wrapped outside the water-blocking layer, and the outer diameter of the outer sheath is 5 mm-8 mm.

9. The self-leaded cable air-blown 288 core OPGW optical cable of claim 1, wherein the center strength member is a GFRP center strength member with a modulus of elasticity of 70 GPa.