CN215575827U - 5G optical fiber sheath taking PBT (polybutylene terephthalate) copolymer as matrix and production line thereof - Google Patents

Abstract

The utility model discloses a 5G optical fiber sheath taking PBT (polybutylene terephthalate) copolymer as a base body and a production line thereof, wherein the 5G optical fiber sheath comprises a plurality of optical fibers, an optical fiber protective sleeve is sleeved outside each optical fiber, a protective sleeve is arranged outside each optical fiber protective sleeve, and each protective sleeve comprises a first non-metal protective layer, a second non-metal protective layer and a third non-metal protective layer which are sequentially arranged from inside to outside. The utility model can improve the regularity and the longitudinal uniformity of the cross section shape of the optical fiber and improve the stability and the tensile capability of the optical fiber.

Description

5G optical fiber sheath taking PBT (polybutylene terephthalate) copolymer as matrix and production line thereof

Technical Field

The utility model relates to the field of optical fiber cables, in particular to a 5G optical fiber sheath taking PBT (polybutylene terephthalate) copolymer as a matrix and a production line thereof.

Background

With the research, development and construction of 5G communication in China, especially the ultrahigh frequency requirement of the 5G technology on wireless communication frequency bands, the demand of equipment is huge no matter the existing base station is updated or a new base station is built.

Generally, the optical cable is called as a drop optical cable, although FTTH is developed in China for nearly 10 years, the variety and structure of the fiber cable to home are relatively single, and fiber cables to home in the communication industry can be roughly divided into two types: one type is overhead introduction, the laying mode is suitable for the dispersed living condition of users and the condition that tower resources are relatively rich, and the optical cable is generally a self-supporting butterfly-shaped optical cable or other types of optical cables; the other type is pipeline introduction, the laying mode is suitable for relatively abundant communication pipeline resources in urban areas, and in the preparation method of the optical cable outer sheath, a flame retardant system is added into resin after being uniformly mixed, however, nano Mg (OH)₂Is an additive flame retardant, needs a large amount of filling to play a flame retardant role, and the surface area of PBT particles is limited, and the amount of nano Mg (() H)2 which can be adhered to the surface of the PBT particles is also limited.

The optical cable prepared by the method has irregular cross section shape, nonuniform longitudinal direction of the optical cable, unstable outer sleeve of the optical cable, and needs special pipelines to protect the optical cable in regions with slightly severe conditions, thereby increasing laying cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a 5G optical fiber sheath taking PBT copolymer as a matrix and a production line thereof, which improve the regularity and the longitudinal uniformity of the cross section shape of an optical fiber and improve the stability and the tensile strength of the optical fiber.

The technical purpose of the utility model is realized by the following technical scheme: A5G optical fiber sheath taking PBT copolymer as a matrix is characterized in that: the optical fiber protection sleeve comprises a plurality of optical fibers, wherein an optical fiber protection sleeve is sleeved outside each optical fiber, a protection sleeve is arranged outside each optical fiber protection sleeve, and each protection sleeve comprises a first nonmetal protection layer, a second nonmetal protection layer and a third nonmetal protection layer which are sequentially arranged from inside to outside.

Optionally, the first non-metal protection layer surrounds the optical fiber along the length direction of the optical fiber, the first non-metal protection layer includes a dry water-blocking material, the second non-metal protection layer includes a water-blocking yarn, and the third non-metal protection layer includes polyvinyl chloride.

Optionally, the optical fiber protective sleeve is made of the following materials in parts by weight: the flame retardant is composed of, by weight, 70-90 parts of PBT, 5-10 parts of glass fiber, 13-18 parts of nano Mg (OH)2 flame retardant, 0.1-2 parts of toughening agent, 2-5 parts of silane coupling agent, 2 parts of modified ethylene bis-fatty acid amide, 0.1-0.5 part of antioxidant, 0.5-2 parts of ultraviolet resistant agent, 0.1-0.5 part of light stabilizer, 0.1-0.3 part of rare earth element and 0.05-0.1 part of nucleating agent.

The utility model provides a production line of 5G optical fiber sheath with PBT copolymer as base member, includes extruder, slow cooling device, hot-water tank, warm water groove, cold water tank and the blowing dryer that connect gradually from preceding to back, transmission device and admission machine that the blowing dryer exit connects gradually.

Optionally, the transmission device is including placing the seat, place and seted up on the seat and place the hole, the pore wall of placing the hole rotates and is connected with a plurality of rotations wheels, each rotate wheel parallel to each other and evenly distributed, it is equipped with vertical board on the seat to place, the vertical board is kept away from the one end of placing the seat and is rotated through the axis of rotation and be connected with the board that stretches out that is located each rotation wheel top, it is connected with a roll section of thick bamboo to stretch out one side rotation that the axis of rotation was kept away from to the board, the both ends of a roll section of thick bamboo are rotated and are connected on the both sides of stretching out the board, axis of rotation one end is equipped with the rotation piece that the drive stretched out the board removal.

Optionally, the rotating part comprises a forward and reverse rotating motor, the placing seat is provided with a fixing seat, the forward and reverse rotating motor is arranged on the fixing seat, the forward and reverse rotating motor is connected to one end of the rotating shaft, the extending plate is provided with a displacement sensor, and the forward and reverse rotating motor is a servo motor.

Optionally, the hot water tank, the warm water tank and the cold water tank are all provided with heating rods, and the hot water tank, the warm water tank and the cold water tank are all provided with thermistors for controlling the heating rods to work.

Optionally, the hot water tank, the warm water tank and the cold water tank are all provided with temperature sensors, and the hot water tank, the warm water tank and the cold water tank are all provided with an alarm bell and an alarm lamp controlled by the temperature sensors.

Optionally, the slow cooling device is including setting up a plurality of slow cooling poles on the surface around extruder mould port, and is a plurality of slow cooling pole is along optical cable extrusion direction and extruder mould port surface threaded connection, and is a plurality of slow cooling pole back of the body is fixed on the surface that is provided with a plurality of rings, and is a plurality of form a plurality of clearances between ring and a plurality of slow cooling poles, and is a plurality of twine a plurality of heating wires in the clearance, the heating wire presents netted.

In conclusion, the utility model achieves the following beneficial effects:

1. the utility model can improve the regularity and the longitudinal uniformity of the cross section shape of the optical fiber, and improve the stability and the tensile capability of the optical fiber;

2. the utility model adopts step-type mixing, has good mixing effect, and improves the regularity of the cross section shape and the longitudinal uniformity of the optical fiber;

3. the slow cooling device is arranged at the die port of the extruder, so that the optical cable is heated uniformly during transmission, the defects of uneven thickness, discontinuity, rough surface and the like of the appearance caused by rapid cooling of the optical cable are overcome, and the plasticizing time of the material is prolonged, so that the quality of a product produced by the extruder is improved, and the construction efficiency is effectively improved;

4. the utility model adjusts the gap between the rolling cylinder and the rotating wheel in real time, so that optical cables with different sizes can penetrate through the gap between the rolling cylinder and the rotating wheel, the optical cables are not easy to extrude and deform in the transmission process, the integral stability is increased, and the working efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of a conductive strip structure according to the present embodiment;

FIG. 2 is a schematic flow diagram of the extruder embodied in the present embodiment;

FIG. 3 is a schematic structural diagram of a hot water tank, a warm water tank and a cold water tank according to the present embodiment;

FIG. 4 is a schematic structural diagram of a rolling cartridge according to the present embodiment;

fig. 5 is a schematic structural view of the slow cooling device according to the present embodiment.

Wherein, 1, optical fiber protective sleeve; 2. an optical fiber; 3. a protective sleeve; 4. a first non-metallic protective layer; 5. a second non-metallic protective layer; 6. a third non-metallic protective layer; 7. a placing seat; 8. placing holes; 9. a rotating wheel; 10. a vertical plate; 11. a rotating shaft; 12. extending the plate; 13. a rolling cylinder; 14. a positive and negative rotation motor; 15. a fixed seat; 16. a displacement sensor; 17. a hot water tank; 18. a warm water tank; 19. a cold water tank; 20. a heating rod; 21. a thermistor; 22. an alarm lamp; 23. an alarm bell; 24. a temperature sensor; 25. a slow cooling rod; 26. a metal ring; 27. a gap; 28. an electric heating wire; 29. an extruder; 30. provided is a wire rewinding machine.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A5G optical fiber sheath taking PBT (polybutylene terephthalate) copolymer as a base body comprises a plurality of optical fibers 2 as shown in figures 1-3, wherein an optical fiber protective sleeve 1 is sleeved outside each optical fiber 2, and the optical fiber protective sleeve is characterized in that the optical fiber protective sleeve is made of the following materials in parts by weight: 70-90 parts of PBT, 5-10 parts of glass fiber, 13-18 parts of nano Mg (OH)2 flame retardant, 0.1-2 parts of toughening agent, 2-5 parts of silane coupling agent, 2 parts of modified ethylene bis fatty acid amide, 0.1-0.5 part of antioxidant, 0.5-2 parts of ultraviolet resistant agent, 0.1-0.5 part of light stabilizer, 0.1-0.3 part of rare earth element and 0.05-0.1 part of nucleating agent, wherein the added light stabilizer, the glass fiber and the rare earth element generate an electric field which is locally and non-uniformly distributed by a covalent bond between the rare earth ion and PBT matrix atoms, so that the degenerate energy level of free ions is split, and the optical spectrum shows a fine structure related to the degenerate energy levels; on the other hand, the spectrum is widened, mainly the temperature-related acoustic broadening and the nonuniform broadening of the electric field in the matrix to the energy level perturbation, different glass matrixes have different effects on the splitting of the energy level of the rare earth ions, so that the absorption and emission sections of the rare earth ions generate different changes, the added glass fiber has good cable sheath compatibility, small fusion loss and good heat resistance, the cross section shape regularity and the longitudinal uniformity of the optical fiber 2 are good, and the stability and the tensile strength of the optical fiber 2 are improved.

In addition, as shown in fig. 1-3, a protective sleeve 3 is arranged outside the optical fiber protective sleeve 1, the protective sleeve 3 sequentially comprises a first non-metal protective layer 4, a second non-metal protective layer 5 and a third non-metal protective layer 6 from inside to outside, the first non-metal protective layer 4 surrounds the optical fiber 2 along the length direction of the optical fiber 2, the first non-metal protective layer 4 comprises a dry water-blocking material, the second non-metal protective layer 5 comprises a water-blocking yarn, the third non-metal protective layer 6 comprises polyvinyl chloride, the first non-metal protective layer comprises the dry water-blocking material, induced current is prevented from being generated, and the influence of an electric field of the cable is reduced, so that the electric energy loss of the cable is reduced; the second non-metal protective layer comprises water-blocking yarns, so that water can be prevented from entering the internal optical fibers 2, and the service lives of the cable and the optical fiber 2 units are prolonged; the third non-metallic protective layer 6 comprises polyvinyl chloride, which is a reinforcing layer and improves the tensile strength of the optical fiber 2 unit.

A method for preparing a 5G optical fiber sheath taking PBT copolymer as a matrix, as shown in figures 1-5, comprises the following steps: firstly, mixing raw materials: firstly, adding a small amount of flame retardant into a stirrer, mixing with a proper amount of antioxidant and silane coupling agent to enable the PBT and the flame retardant system to be connected more tightly, extruding the mixed raw materials by a co-rotating parallel double-screw extruder 29, cutting and granulating by a cutting machine, mixing the obtained granules with the rest flame retardant, adding glass fiber, toughening agent, modified ethylene di-fatty acid amide, antioxidant, anti-ultraviolet agent, light stabilizer, rare earth element and nucleating agent, and granulating;

the second step is that: blending and extruding: extruding the mixed material by a screw plastic extruder 29, connecting a mold of the plastic extruder into a handpiece of the plastic extruder, performing plastic molding on the plastic in the extruder 29, and sequentially connecting an extrusion port of the plastic extruder with a slow cooling device, a hot water tank 17, a warm water tank 18, a cold water tank 19 and a blow-drying machine;

and thirdly, a transmission device and a take-up machine 30 are sequentially placed at the outlet of the blow-drying machine.

Adopt the cascaded mixture of first step, mix effectually, improve the cross section shape regularity and the vertical homogeneity of optic fibre 2, be provided with slow cooling device at extruding machine mould port, it is even to be heated when making the optical cable transmission, has avoided the thickness inequality of the outward appearance that the optical cable sharply cooled off and brought, has been interrupted and shortcoming such as surperficial coarse, has prolonged the plastify time of material, has consequently improved the quality of the product that the extruding machine produced, effectual promotion efficiency of construction.

As shown in fig. 4-5, since there may be an uneven phenomenon on the outer surface of the optical cable of the extruder 29, in order to make the optical cable not easily deform during the transmission process, the transmission device includes a placing base 7, a placing hole 8 is formed on the placing base 7, a plurality of rotating wheels 9 are rotatably connected to the hole wall of the placing hole 8, the rotating wheels 9 are parallel to each other and uniformly distributed, a vertical plate 10 is disposed on the placing base 7, one end of the vertical plate 10, which is far away from the placing base 7, is rotatably connected to a protruding plate 12, which is located above each rotating wheel 9, through a rotating shaft 11, a rolling cylinder 13 is rotatably connected to one side of the protruding plate 12, both ends of the rolling cylinder 13 are rotatably connected to both sides of the protruding plate 12, one end of the rotating shaft 11 is provided with a rotating member for driving the protruding plate 12 to move, the rotating member includes a forward and reverse motor 14, a fixing base 15 is disposed on the placing base 7, the forward and reverse motor 14 is disposed on the fixing base 15, the positive and negative rotation motor 14 is connected to one end of the rotating shaft 11, the extending plate 12 is provided with the displacement sensor 16, the positive and negative rotation motor 14 is a servo motor, the displacement value of the displacement sensor 16 is set in advance, when the gap 27 between the rolling cylinder 13 and the gap 27 of the rotating wheel 9 reaches a set value, the servo motor is started, the servo motor drives the rotating shaft 11 to rotate, the gap 27 between the rolling cylinder 13 and the rotating wheel 9 is adjusted in real time, so that optical cables of different sizes penetrate through the gap 27 between the rolling cylinder 13 and the rotating wheel 9, extrusion deformation is not prone to occurring in the transmission process of the optical cables, the overall stability is improved, and the working efficiency is improved.

As shown in fig. 3-5, the hot water tank 17, the warm water tank 18, the cold water tank 19 are all provided with a heating rod 20, the hot water tank 17, the warm water tank 18, the cold water tank 19 are all provided with a thermistor 21 for controlling the operation of the heating rod 20, the hot water tank 17, the warm water tank 18, the cold water tank 19 are all provided with a temperature sensor 24, the hot water tank 17, the warm water tank 18, the cold water tank 19 are all provided with an alarm bell 23 and an alarm lamp 22 controlled by the temperature sensor 24, the heating rod 20 is completely put into water, the heating rod 20 starts to operate when the actual temperature is lower than the preset temperature, when the temperature is higher than the preset temperature, the current detected by the thermistor 21 increases, the resistance decreases, the circuit stops heating, when the temperature sensor 24 exceeds the preset temperature or is damaged or fails, the alarm lamp 22 lights, the alarm bell 23 sounds, the power supply can be immediately turned off, and the situation that the hot water tank 17, the temperature is not reached, The temperature of the warm water tank 18 and the cold water tank 19 is higher than the preset temperature, and the circuit is damaged.

As shown in fig. 5, the slow cooling device includes a plurality of slow cooling rods 25 disposed on the surface around the port of the plastic extruding machine, the plurality of slow cooling rods 25 are in threaded connection with the surface of the port of the plastic extruding machine along the optical cable extruding direction, a plurality of metal rings 26 are fixedly disposed on the surface of the back of the plurality of slow cooling rods 25, a plurality of gaps 27 are formed between the plurality of metal rings 26 and the plurality of slow cooling rods 25, a plurality of heating wires 28 are wound in the plurality of gaps 27, the heating wires 28 are net-shaped, after the heating wires 28 are powered on, the plurality of heating wires 28 are inserted into the plurality of gaps 27, the heating wires 28 are net-shaped, so that the optical cable is uniformly heated during transmission, defects of uneven thickness, discontinuity, rough surface and the like of the appearance caused by rapid cooling of the optical cable are avoided, the plasticizing time of the material is prolonged, the quality of products produced by the plastic extruding machine is improved, and the construction efficiency is effectively improved.

Example 1

A preparation method of a 5G optical fiber 2 sheath taking PBT copolymer as a matrix comprises the following steps:

firstly, mixing raw materials: adding 70-90 parts of PBT (polybutylene terephthalate), 5 parts of a small amount of nano Mg (OH)2 flame retardant and 0.1-0.5 part of antioxidant and 2-5 parts of silane coupling agent by weight into a stirrer to enable the PBT and the flame retardant system to be connected more tightly, extruding the mixed raw materials by using a co-rotating parallel double-screw extruder 29, cutting and granulating by using a cutting machine, mixing the obtained particles with 8 parts of the remaining nano Mg (OH)2 flame retardant, adding 5-10 parts of glass fiber, 0.1-2 parts of toughening agent, 2 parts of modified ethylene bis fatty acid amide, 0.5-2 parts of ultraviolet resistant agent, 0.1-0.5 part of light stabilizer, 0.1-0.3 part of rare earth element and 0.05-0.1 part of nucleating agent, and then granulating;

the second step is that: blending and extruding: extruding the mixed material by a screw plastic extruder 29, connecting a mold of the plastic extruder into a handpiece of the plastic extruder, performing plastic molding on the plastic in the extruder 29, and sequentially connecting an extrusion port of the plastic extruder with a slow cooling device, a hot water tank 17, a warm water tank 18, a cold water tank 19 and a blow-drying machine;

and thirdly, a transmission device and a take-up machine 30 are sequentially placed at the outlet of the blow-drying machine.

Adopt the cascaded mixture of first step, mix effectually, improve the cross section shape regularity and the vertical homogeneity of optic fibre 2, be provided with slow cooling device at extruding machine mould port, it is even to be heated when making the optical cable transmission, has avoided the thickness inequality of the outward appearance that the optical cable sharply cooled off and brought, has been interrupted and shortcoming such as surperficial coarse, has prolonged the plastify time of material, has consequently improved the quality of the product that the extruding machine produced, effectual promotion efficiency of construction.

Fourthly, the prepared flame-retardant PBT optical cable is subjected to mechanical property, flame retardant property, aging resistance, ultraviolet resistance and high and low temperature performance tests, wherein the mechanical property is mainly tested by stretching, flattening, impacting and repeated bending, and the specific data are shown in the following table 1:

the specific data of the high and low temperature performance test are shown in the following table 2

Tensile strength in mechanical properties is mainly provided by the optical fiber sleeve and the aramid fiber inside, sufficient tensile force can be completely provided, the wall thickness of the sleeve is 0.7mm, the high-modulus PBT sleeve adopts high-modulus PBT, can bear 3000N of flattening force, can provide sufficient toughness and fatigue resistance, and cannot damage the PBT sleeve in repeated bending tests.

The flame retardant performance passes through a single vertical combustion test specified in GB/T18380.12-2008, and tests show that the distance between the lower edge of the upper chuck of the optical cable and the starting point of the carbonization part is 450mm, and the distance between the carbonization point extending downwards in combustion and the lower edge of the upper clamp is 520mm, so that the standard requirement is met.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims (7)

1. A5G optical fiber sheath taking PBT copolymer as a matrix is characterized in that: the optical fiber protection sleeve comprises a plurality of optical fibers, wherein an optical fiber protection sleeve is sleeved outside each optical fiber, a protection sleeve is arranged outside each optical fiber protection sleeve, and each protection sleeve comprises a first nonmetal protection layer, a second nonmetal protection layer and a third nonmetal protection layer which are sequentially arranged from inside to outside.

2. The 5G optical fiber sheath taking PBT copolymer as a matrix according to claim 1, wherein: the optical fiber is surrounded along optical fiber length direction to first non-metal protection layer, first non-metal protection layer includes that the dry hinders the water material, the yarn is hindered including blocking water to the second non-metal protection layer, the third non-metal protection layer includes polyvinyl chloride.

3. A production line for a 5G optical fiber jacket based on PBT copolymer as defined in any one of claims 1-2, wherein: the device comprises an extruder, a slow cooling device, a hot water tank, a warm water tank, a cold water tank and a blow-drying machine which are sequentially connected from front to back, wherein a transmission device and a take-up machine are sequentially connected at an outlet of the blow-drying machine;

the transmission device is including placing the seat, place and seted up on the seat and place the hole, the pore wall of placing the hole rotates and is connected with a plurality of rotations wheels, each rotate wheel parallel to each other and evenly distributed, it is equipped with vertical board on the seat to place, the vertical board is kept away from the one end of placing the seat and is rotated through the axis of rotation and be connected with the board that stretches out that is located each rotation wheel top, it is connected with a roll section of thick bamboo to stretch out one side rotation that the axis of rotation was kept away from to the board, the both ends of a roll section of thick bamboo are rotated and are connected on the both sides of stretching out the board, axis of rotation one end is equipped with the rotation piece that the drive stretched out the board removal.

4. The production line of 5G optical fiber sheath using PBT copolymer as matrix according to claim 3, wherein: the rotating part comprises a positive and negative rotating motor, a fixing seat is arranged on the placing seat, the positive and negative rotating motor is arranged on the fixing seat, the positive and negative rotating motor is connected to one end of the rotating shaft, a displacement sensor is arranged on the extending plate, and the positive and negative rotating motor is a servo motor.

5. The production line of 5G optical fiber sheath using PBT copolymer as matrix according to claim 3, wherein: the hot water tank, the warm water tank and the cold water tank are all provided with heating rods, and the hot water tank, the warm water tank and the cold water tank are all provided with thermistors for controlling the heating rods to work.

6. The production line of 5G optical fiber sheath using PBT copolymer as matrix according to claim 5, wherein: the hot water tank, the warm water tank and the cold water tank are respectively provided with a temperature sensor, and the outside of the hot water tank, the warm water tank and the cold water tank is respectively provided with an alarm bell and an alarm lamp which are controlled by the temperature sensors.

7. The production line of 5G optical fiber sheath using PBT copolymer as matrix according to claim 3, wherein: the slow cooling device is including setting up a plurality of slow cooling poles on the surface around extruder mould port, and is a plurality of slow cooling pole is along optical cable extrusion direction and extruder mould port surface threaded connection, and is a plurality of slow cooling pole back of the body is fixed on the surface that is provided with a plurality of rings, and is a plurality of form a plurality of clearances between ring and a plurality of slow cooling pole, and is a plurality of twine a plurality of heating wires in the clearance, the heating wire presents netted.

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