CN110931153A - Fire-resistant optical fiber composite bunched cable and preparation method thereof - Google Patents
Fire-resistant optical fiber composite bunched cable and preparation method thereof Download PDFInfo
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- CN110931153A CN110931153A CN201911237652.6A CN201911237652A CN110931153A CN 110931153 A CN110931153 A CN 110931153A CN 201911237652 A CN201911237652 A CN 201911237652A CN 110931153 A CN110931153 A CN 110931153A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
- H01B13/268—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping of a non-metallic sheet
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/005—Power cables including optical transmission elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/008—Power cables for overhead application
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Abstract
The invention relates to the field of cables, in particular to a fire-resistant optical fiber composite bunched cable and a preparation method thereof. The invention relates to a fire-resistant optical fiber composite bunched cable which comprises four cables and an optical fiber, wherein connecting ribs are arranged among the cables, one connecting rib is arranged between one cable and the optical fiber, connecting rib holes are formed in the connecting ribs, the cable comprises an insulating layer, a mica tape is arranged in the insulating layer, a heat-resistant aluminum alloy round wire layer is arranged in the mica tape, a heat-resistant aluminum alloy arched layer is arranged in the heat-resistant aluminum alloy round wire layer, a steel core is arranged in the heat-resistant aluminum alloy arched layer, a gap is formed between the steel core and the heat-resistant aluminum alloy arched layer, and heat-resistant silicon lubricating grease is filled in the gap.
Description
Technical Field
The invention relates to the field of cables, in particular to a fire-resistant optical fiber composite bunched cable and a preparation method thereof.
Background
The power fiber to the home can meet the self-development requirement of the smart grid and can comprehensively support integration of three networks. The power fiber to the home can realize the co-construction and sharing of network infrastructure, greatly reduce the implementation cost of three-network integration, improve the comprehensive operation efficiency of the network, and has obvious advantages in the aspects of energy conservation and environmental protection. The power fiber-to-the-home technology realizes that the problem that the photoelectric composite cable enters the home only needs one-time construction and one channel, can replace the multiple construction of a plurality of circuits such as the traditional electric wire, network cable, telephone wire, cable television and the like, and greatly saves the cable resource and public safety. The cable laying can be completed simultaneously, the fiber-to-the-home can be completed, the power high-speed data network platform is constructed by matching with the EPON (passive optical network based on the Ethernet mode) technology, and the services such as data, voice, video and the like can be provided. Users can directly access the Internet through the power optical fiber, dial digital phones and watch high-definition televisions, support automatic coordination control on intelligent household appliances such as air conditioners, electric water heaters and electric cookers, and synchronously realize the integrated reading and comprehensive application of three meters of electric meters, water meters and gas meters.
The parallel bundling type optical fiber composite low-voltage cable is an optical fiber composite cable formed by compounding an optical unit on a parallel bundling overhead insulated cable in parallel, has the functions of a communication optical cable and a common parallel bundling type overhead insulated cable, integrates the functions of optical fiber communication and power transmission, can finish optical fiber home-entry while laying the cable, avoids secondary wiring, and effectively reduces the cost of construction, network construction and the like. With the comprehensive start of the power fiber-to-the-home pilot engineering construction, the parallel-bundled fiber composite low-voltage cable is also paid more attention. An insulation layer is prepared outside a cable core wire and an optical unit by adopting an extrusion insulation method to serve as a sheath (namely an insulation sheath) outside the parallel cluster type optical fiber composite low-voltage overhead insulated cable.
The existing parallel optical fiber composite bunched cable has poor fire resistance.
Disclosure of Invention
In order to solve the defects of the prior art, the invention hopes to provide a fire-resistant optical fiber composite bunched cable and a preparation method thereof, and the specific scheme is as follows:
the utility model provides a fire-resistant optical fiber composite bunched cable, includes four cables and an optic fibre, be equipped with the splice bar between the cable, one of them is equipped with the splice bar between cable and optic fibre, be equipped with the splice bar hole on the splice bar, the cable includes the insulating layer, be equipped with the mica tape in the insulating layer, be equipped with heat-resisting aluminum alloy round line layer in the mica tape, be equipped with heat-resisting aluminum alloy layer of encircleing in the heat-resisting aluminum alloy round line layer, be equipped with the steel core in the heat-resisting aluminum alloy layer of encircleing, be equipped with the clearance between steel core and the heat-resisting.
The optical fiber and the cable both comprise mica tapes and have a fire-resistant effect.
Adding a plasticizer into the insulating layer, wherein the plasticizer comprises dioctyl phthalate (DOP), chlorinated paraffin and epoxidized soybean oil; the mass ratio of the dioctyl phthalate, the chlorinated paraffin and the epoxidized soybean oil is 60-80: 10-30: 5-15. The plasticity of the insulating layer is improved, the three plasticizers are adopted for matching, wherein DOP and the polymer have good compatibility, the plasticizing efficiency is high, and the water absorption is low, so that the chlorinated paraffin has certain plasticizing effect as a main plasticizer, but the flame retardant effect and the electric insulation performance are excellent, the epoxidized soybean oil can further enhance the electric insulation performance of the insulating layer as an auxiliary plasticizer, and meanwhile, the epoxidized soybean oil has good thermal stability and can also improve the heat resistance of the insulating layer.
The heat-resistant aluminum alloy round wire layer and the heat-resistant aluminum alloy arched layer are both made of heat-resistant aluminum alloy, the weight ratio of elements in the heat-resistant aluminum alloy is 0.2-0.35% of Fe, 0.15-0.3% of Si, 0.1-0.25% of ZrC, 0.2-0.4% of Mg, less than or equal to 0.01% of Ti, and the balance of aluminum and other trace elements and impurities. The addition of rare earth can play a role in microalloying, certain functions of removing hydrogen, refining and purifying, eliminating harmful impurities, refining crystal grains and other deteriorative functions, and also has a function of improving the conductivity (especially for aluminum ingots with higher silicon content).
The preparation method of the fire-resistant optical fiber composite bundling electrode as claimed in claim 1, comprising the steps of:
(1) continuous casting and rolling;
(2) drawing wires;
(3) aging;
(4) stranding;
(5) wrapping a mica tape;
(6) extruding and molding;
(7) and (4) steam crosslinking.
The continuous casting and rolling process comprises the following steps: the production method comprises the following steps of melting, heat preservation, continuous casting, heating, continuous rolling, quenching and rod winding, wherein elements are added during the heat preservation step, refining and stirring are carried out, two heat preservation furnaces are adopted in the heat preservation step and can be used alternately, and the production efficiency can be improved.
The temperature of any step in the continuous casting and rolling process is not higher than 760 ℃. The smelting temperature of the aluminum alloy is too high, so that the burning loss of hydrogen absorption, oxidation and nitridation can be increased. Research shows that the solubility of hydrogen in aluminum liquid is increased sharply above 760 ℃, and when the hydrogen absorption is reduced thermally, a plurality of ways exist, such as drying a smelting furnace and a smelting tool, preventing the use of a flux from being affected with damp and deteriorating. However, the melting temperature is one of the most sensitive factors, and an excessively high melting temperature not only wastes energy and increases cost, but also is a direct cause of defects such as pores, coarse grains, feather grains and the like.
The aging process adopts a grading aging mode, the primary aging temperature is 120 +/-5 ℃, and the heat preservation is carried out for 8-10 hours, so that a high-density G-P region is generated before the critical temperature, and the uniform phase change and nucleation are the premise of the uniformity of an alloy structure; the secondary aging temperature is 190 +/-5 ℃, the temperature is kept for 12-15 h, a precipitate phase is uniformly separated out on the basis of the G-P area core, and the comprehensive properties of the alloy material such as conductivity, tensile strength and elongation are ensured to uniformly reach the standard. According to research, different aging temperatures have different holding times for obtaining the maximum strength value or different strength values in the same holding time, because the critical crystal nucleus size, the amount, the components and the enrichment zone growth speed of precipitated phases are different in aging at different temperatures. If the temperature is too low, diffusion is difficult, GP zones are not easily formed or are small in number, and thus the strength after aging is low, whereas if the aging temperature is too high, diffusion is easily generated, and a supersaturated solid solution precipitate phase is coarse, so that the strength is reduced, that is, an overaging phenomenon is generated. Each alloy therefore has an optimum ageing temperature for a certain holding time. The different ageing temperatures have different influences on the ageing effect. It should be noted that a certain ageing temperature must be combined with a certain ageing time in order to obtain a satisfactory strengthening effect. Compared with single-stage aging, the aging time can be shortened, and the stress corrosion resistance, fatigue strength and fracture toughness of the alloy can be obviously improved under the condition of keeping the mechanical property unchanged.
The mould is used in the extrusion molding, the mould includes the die sleeve, be equipped with the mold core on the die sleeve, be equipped with the plastics import between die sleeve and the mold core, the mold core includes 4 wire through wires holes and 1 optic fibre through wires hole, the downthehole steel pipe that is equipped with of optic fibre through wires, the steel pipe stretches into the plastics import. The steel pipe stretches into the plastic inlet to play a role in protecting the optical fiber.
The die sleeve comprises an extruded plastic hole and a connecting rib hole, a connecting rib hole forming piece is arranged on the connecting rib hole, the connecting rib hole forming piece comprises an elliptic cylinder hole forming piece and a fixing device, and the fixing device is arranged at the rear end of the connecting rib hole.
The conductor structure of the invention adopts the function of a clearance type steel-cored aluminum alloy stranded wire: 1. the heat-resistant aluminum alloy conductor (namely the heat-resistant aluminum alloy arched layer) adjacent to the steel core is in an arched shape, and the function of a gap structure is adopted, namely the heat-resistant aluminum alloy conductor and the steel core are mutually interfered due to different natural vibration frequencies of the aluminum wire and the steel core, so that the energy of wind-induced vibration is automatically consumed, the vibration damping effect is achieved, and the self-damping characteristic is better. 2. The gap between the steel core and the conductor is coated with heat-resistant silicon grease, which has the functions of protecting the steel core from impact wear caused by vibration and electric corrosion caused by long-term electrification and prolonging the service life of the cable. 3. The heat-resistant aluminum alloy wire is used for improving the current-carrying capacity by at least 1.5 times at higher working temperature.
Meanwhile, the insulating layer is added with the plasticizer with the heat-resistant and flame-retardant effects, so that the plasticity of the insulating layer can be increased, and the heat-resistant and flame-retardant effects are achieved.
Drawings
FIG. 1 is a schematic structural diagram of a fire-resistant optical fiber composite bunched cable according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1A;
FIG. 3 is a schematic structural diagram I of a mold in a method for manufacturing a fire-resistant optical fiber composite bunched cable according to the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3A;
FIG. 5 is a schematic structural diagram of a mold in the method for manufacturing a fire-resistant optical fiber composite bunched cable of the present invention;
wherein the reference numbers: 1. a cable; 11. an insulating layer; 12. mica tapes; 13. a heat-resistant aluminum alloy round wire layer; 14. a heat-resistant aluminum alloy arch layer; 15. a steel core; 16. filling heat-resistant silicon lubricating grease; 17. gap 2. optical fiber; 21. a flame retardant polyolefin jacket; 22. an optical fiber conducting unit; 221. a central core; 222. a fiber core; 23. a central reinforcing core; 3. connecting ribs; 31. connecting rib holes; 4. a mold; 41. die sleeve; 411. a plastic hole; 412. connecting rib holes; 413. connecting rib perforating pieces; 4131. an elliptical cylinder perforating piece; 4132. a fixing device; 421. a wire threading hole; 422. an optical fiber threading hole; 423. a steel pipe; 42. a mold core; 421. a wire threading hole; 422. an optical fiber threading hole; 423. a steel pipe; 43. a plastic inlet; 44. a bolt; 45. the tip is positioned.
Detailed Description
Example 1
This is further illustrated below in connection with FIGS. 1-5:
a fire-resistant optical fiber composite bunched cable comprises four cables 1 and an optical fiber 2 (the optical fiber comprises an flame-retardant polyolefin outer sleeve 21, a mica tape 12 is arranged in the flame-retardant polyolefin outer sleeve 21, a central reinforcing core 23 is arranged in the mica tape 12, a plurality of optical fiber conducting units 22 are uniformly distributed outside the central reinforcing core 23, the optical fiber conducting units 22 comprise a central fiber core 221 and a plurality of fiber cores 222 are uniformly distributed outside the central fiber core 221), connecting ribs 3 are arranged between the cables 1, a connecting rib 3 is arranged between one cable 1 and the optical fiber 2, connecting rib holes 31 are formed in the connecting rib 3 (the arrangement of the connecting rib holes 31 can facilitate the cables 1, the optical fiber 2 can be separated when being separated, the cables in the prior art are generally convenient to thread, the cables 1 and the optical fiber 2 still need to be separated after arriving at a specified place), the cables 1 comprise an insulating layer 11, the mica, a heat-resistant aluminum alloy round wire layer 13 is arranged in the mica tape 12, a heat-resistant aluminum alloy arched layer 14 is arranged in the heat-resistant aluminum alloy round wire layer 13, a steel core 15 is arranged in the heat-resistant aluminum alloy arched layer 14, a certain gap 17 is reserved between the steel core 15 and the heat-resistant aluminum alloy arched layer 14, and a gap between the outer layer of the steel core and the heat-resistant aluminum alloy arched layer, which is not in contact with the steel core, is filled with heat-resistant silicon.
Both the optical fiber 2 and the cable 1 comprise a mica tape 12. Has the function of fire resistance.
The insulation layer 11 (for example, in the case of the insulation layer mainly made of cross-linked polyethylene) is internally added with a plasticizer including dioctyl phthalate (DOP), chlorinated paraffin and epoxidized soybean oil; the mass ratio of the dioctyl phthalate, the chlorinated paraffin and the epoxidized soybean oil is 70: 20: 10. the plasticity of the insulating layer is improved, the three plasticizers are adopted for matching, wherein DOP and the polymer have good compatibility, the plasticizing efficiency is high, and the water absorption is low, so that the chlorinated paraffin has certain plasticizing effect as a main plasticizer, but the flame retardant effect and the electric insulating property are beneficial, the epoxidized soybean oil can further enhance the electric insulating property of the insulating layer as an auxiliary plasticizer, and meanwhile, the epoxidized soybean oil has good thermal stability and can also improve the heat resistance of the insulating layer.
The heat-resistant aluminum alloy round wire layer 13 and the heat-resistant aluminum alloy arched layer 14 are both made of heat-resistant aluminum alloy, the weight ratio of each element in the heat-resistant aluminum alloy is 0.2-0.35% of Fe, 0.15-0.3% of Si, 0.1-0.25% of ZrC, 0.2-0.4% of Mg, less than or equal to 0.01% of Ti, and the balance of aluminum and other trace elements and impurities. The addition of rare earth can play a role in microalloying, certain functions of removing hydrogen, refining and purifying, refining crystal grains, deteriorating and improving the conductivity (especially for aluminum ingots with higher silicon content).
A method for preparing the fire-resistant optical fiber composite bundling electrode of claim 1, comprising the steps of:
(1) continuous casting and rolling;
(2) drawing wires;
(3) aging;
(4) stranding;
(5) wrapping a mica tape;
(6) extruding and molding;
(7) and (4) steam crosslinking.
The continuous casting and rolling process comprises the following steps: melting, heat preservation, continuous casting, heating, continuous rolling, quenching and rod winding, wherein elements are added during the heat preservation step, refining and stirring are carried out, and two heat preservation furnaces are adopted in the heat preservation step. The two holding furnaces can be used alternately, so that the production efficiency can be improved.
The temperature of any step in the continuous casting and rolling process is not higher than 760 ℃. The smelting temperature of the aluminum alloy is too high, so that the burning loss of hydrogen absorption, oxidation and nitridation can be increased. Research shows that the solubility of hydrogen in aluminum liquid is increased sharply above 760 ℃, and when the hydrogen absorption is reduced thermally, a plurality of ways exist, such as drying a smelting furnace and a smelting tool, preventing the use of a flux from being affected with damp and deteriorating. However, the melting temperature is one of the most sensitive factors, and an excessively high melting temperature not only wastes energy and increases cost, but also is a direct cause of defects such as pores, coarse grains, feather grains and the like.
The aging process adopts a grading aging mode, the primary aging temperature is 120 +/-5 ℃, and the heat preservation is carried out for 8-10 hours, so that a high-density G-P region is generated before the critical temperature, the phase change and nucleation are uniform, and the premise of the uniformity of an alloy structure is provided; the secondary aging temperature is 190 +/-5 ℃, the temperature is kept for 12-15 h, a precipitate phase is uniformly separated out on the basis of the G-P area core, and the comprehensive properties of the alloy material such as conductivity, tensile strength and elongation are ensured to uniformly reach the standard. According to research, different aging temperatures have different holding times for obtaining the maximum strength value or different strength values in the same holding time, because the critical crystal nucleus size, the amount, the components and the enrichment zone growth speed of precipitated phases are different in aging at different temperatures. If the temperature is too low, diffusion is difficult, GP zones are not easily formed or are small in number, and thus the strength after aging is low, whereas if the aging temperature is too high, diffusion is easily generated, and a supersaturated solid solution precipitate phase is coarse, so that the strength is reduced, that is, an overaging phenomenon is generated. Each alloy therefore has an optimum ageing temperature for a certain holding time. The different ageing temperatures have different influences on the ageing effect. It should be noted that a certain ageing temperature must be combined with a certain ageing time in order to obtain a satisfactory strengthening effect. Compared with single-stage aging, the aging time can be shortened, and the stress corrosion resistance, fatigue strength and fracture toughness of the alloy can be obviously improved under the condition of keeping the mechanical property unchanged.
Mould 4 is used in the extrusion molding, and mould 4 includes die sleeve 41, is equipped with mold core 42 on the die sleeve 41, is equipped with plastics import 411 between die sleeve 41 and the mold core 42, and mold core 42 includes 4 wire through wires holes 421 and 1 optic fibre through wires hole 422, is equipped with steel pipe 423 in the optic fibre through wires hole 422, and steel pipe 423 stretches into plastics import 411. The steel pipe 423 extending into the plastic inlet 411 can play a role of protecting the optical fiber 2. The cable 1 and the optical fiber 2 pass through the mold core 42 and then enter the mold sleeve 41 to be coated with plastic, and the plastic enters from the plastic inlet 411.
The die sleeve 41 comprises an extruded plastic hole 411 and a connecting rib hole 412, a connecting rib hole opening piece 413 is arranged on the connecting rib hole 412, the connecting rib hole opening piece 413 comprises an elliptic cylinder hole opening piece 4131 and a fixing device 4132, and the fixing device 4132 is arranged at the rear end of the connecting rib hole 31. That is, the fixing device 4132 can fix the elliptical cylinder drilling member 4131, the fixing device 4132 is only located at the rear end, and the front end is not blocked by the fixing device 4132, so that the tie bars 3 can form elliptical through holes (i.e., the tie bar holes 31).
The conductor structure of the invention adopts the function of a clearance type steel-cored aluminum alloy stranded wire: 1. the heat-resistant aluminum alloy conductor (namely the heat-resistant aluminum alloy arch layer 14) adjacent to the steel core 15 is in an arch shape, and the function of a gap structure is adopted, namely the heat-resistant aluminum alloy conductor and the steel core are interfered with each other due to different natural vibration frequencies of the aluminum wire and the steel core, so that the energy of wind-induced vibration is automatically consumed, the vibration reduction effect is achieved, and the self-damping characteristic is better. 2. The gap between the steel core 15 and the conductor is coated with heat-resistant silicon grease, which has the functions of protecting the steel core from impact wear caused by vibration and electric corrosion caused by long-term electrification and prolonging the service life of the cable. 3. The heat-resistant aluminum alloy wire is used for improving the current-carrying capacity by at least 1.5 times at higher working temperature.
Examples 2 to 5: the following examples are provided to illustrate the effect of the plasticizer
The rest of the process was the same as example 1 except that the plasticizer was different
Examples 6 to 11: the following examples are provided to illustrate the effect of staged ageing
The above-mentioned embodiments are only used for explaining the inventive concept of the present invention, and do not limit the protection of the claims, and any insubstantial modifications of the invention using this concept shall fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a fire-resistant compound bunched cable of optic fibre which characterized in that: the cable comprises four cables and an optical fiber, wherein connecting ribs are arranged between the cables, one of the connecting ribs is arranged between the cables and the optical fiber, connecting rib holes are formed in the connecting ribs, the cable comprises an insulating layer, a mica tape is arranged in the insulating layer, a heat-resistant aluminum alloy round wire layer is arranged in the mica tape, a heat-resistant aluminum alloy arched layer is arranged in the heat-resistant aluminum alloy round wire layer, a steel core is arranged in the heat-resistant aluminum alloy arched layer, a gap is formed between the steel core and the heat-resistant aluminum alloy arched layer, and heat-resistant silicon lubricating grease is filled in the gap.
2. The fire-resistant optical fiber composite bunched cable of claim 1, wherein: the optical fiber and the cable both include a mica tape.
3. The fire-resistant optical fiber composite bunched cable of claim 1, wherein: a plasticizer is added into the insulating layer, and comprises dioctyl phthalate, chlorinated paraffin and epoxidized soybean oil; the mass ratio of the dioctyl phthalate, the chlorinated paraffin and the epoxidized soybean oil is 60-80: 10-30: 5-15.
4. The fire-resistant optical fiber composite bunched cable of claim 1, wherein: the heat-resistant aluminum alloy round wire layer and the heat-resistant aluminum alloy arched layer are both made of heat-resistant aluminum alloy, the weight ratio of elements in the heat-resistant aluminum alloy is 0.2-0.35% of Fe, 0.15-0.3% of Si, 0.1-0.25% of Zr, 0.2-0.4% of Mg, less than or equal to 0.01% of Ti, and the balance is aluminum and other trace elements and impurities.
5. The method for preparing the fire-resistant optical fiber composite bunched cable of claim 1, comprising the steps of:
continuous casting and rolling;
drawing wires;
aging;
stranding;
wrapping a mica tape;
extruding and molding;
and (4) steam crosslinking.
6. The method for preparing the fire-resistant optical fiber composite bunched cable of claim 5, wherein the continuous casting and rolling process comprises the following steps: melting, heat preservation, continuous casting, heating, continuous rolling, quenching and rod winding, wherein elements are added during the heat preservation step, refining and stirring are carried out, and two heat preservation furnaces are adopted in the heat preservation step.
7. The method for preparing the fire-resistant optical fiber composite bunched cable of claim 6, wherein: the temperature of any step in the continuous casting and rolling process is not higher than 760 ℃.
8. The preparation method of the fire-resistant optical fiber composite bunched cable of claim 5, wherein the aging process adopts a graded aging mode, the primary aging temperature is 120 +/-5 ℃, and the temperature is kept for 8-10 h; the secondary aging temperature is 190 +/-5 ℃, and the heat preservation time is 12-15 h.
9. The method for preparing the fire-resistant optical fiber composite bunched cable of claim 5, wherein a mold is used for extrusion molding, the mold comprises a mold sleeve, a mold core is arranged on the mold sleeve, a plastic inlet is arranged between the mold sleeve and the mold core, the mold core comprises 4 wire threading holes and 1 optical fiber threading hole, a steel pipe is arranged in the optical fiber threading hole, and the steel pipe extends into the plastic inlet.
10. The method for preparing the fire-resistant optical fiber composite bunched cable of claim 9, wherein: the die sleeve comprises an extruded plastic hole and a connecting rib hole, a connecting rib hole forming piece is arranged on the connecting rib hole, the connecting rib hole forming piece comprises an elliptic cylinder hole forming piece and a fixing device, and the fixing device is arranged at the rear end of the connecting rib hole.
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| CN201117321Y (en) * | 2007-11-09 | 2008-09-17 | 江苏中天科技股份有限公司 | Loose sheath type augmented capacity conductor |
| CN202534438U (en) * | 2012-04-01 | 2012-11-14 | 绍兴县电力设备有限公司 | Molding die for parallel clustering-type fiber composite aerial insulated cable |
| CN203982870U (en) * | 2014-06-20 | 2014-12-03 | 绍兴电力设备有限公司 | A kind of parallel cluster type optical fiber composite low-voltage cable of the easily side of returning |
| CN104760151A (en) * | 2015-04-22 | 2015-07-08 | 盐城申源塑胶有限公司 | Equipment for producing elevator cable sheath material and method for equipment |
| CN208622471U (en) * | 2018-08-01 | 2019-03-19 | 江苏通光强能输电线科技有限公司 | A kind of surface treated clearance type capacity-improving conducting wires |
| CN109234579A (en) * | 2018-11-12 | 2019-01-18 | 国网福建省电力有限公司 | A kind of high conductivity is resistance to hanker strength aluminium alloy line and its production technology |
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