阅读说明：本技术 一种光纤复合岸电电缆 (Optical fiber composite shore power cable ) 是由 马辽林 曾旭 张海平 聂磊 于 2021-06-23 设计创作，主要内容包括：本发明涉及电力电缆技术领域,具体为一种光纤复合岸电电缆,由外护套层、加强层、若干个动力线单元、地线单元、若干个信号线单元以及光纤单元组成；所述加强层位于外护套层内侧,两者共同对动力线单元、地线单元、信号线单元、光纤单元进行包覆,经过测试,本发明所制备的光纤复合岸电电缆在4倍电缆外径的弯曲半径下动态弯曲测试,弯曲次数超过5万次光纤裸纤不断芯。(The invention relates to the technical field of power cables, in particular to an optical fiber composite shore power cable which comprises an outer sheath layer, a reinforcing layer, a plurality of power line units, a ground wire unit, a plurality of signal line units and an optical fiber unit; the reinforced layer is positioned on the inner side of the outer sheath layer, the power line unit, the ground line unit, the signal line unit and the optical fiber unit are coated by the reinforced layer and the outer sheath layer together, and through testing, the optical fiber composite shore power cable prepared by the invention is subjected to dynamic bending test under the bending radius of 4 times of the outer diameter of the cable, and the bending frequency exceeds 5 ten thousand times of bare optical fiber core breaking.)

1. An optical fiber composite shore power cable is characterized by comprising an outer sheath layer, a reinforcing layer, a plurality of power line units, a ground line unit, a plurality of signal line units and an optical fiber unit;

the reinforced layer is positioned on the inner side of the outer sheath layer, and the reinforced layer and the outer sheath layer jointly coat the power line unit, the ground wire unit, the signal line unit and the optical fiber unit.

2. The fiber optic composite shore power cable of claim 1, wherein said outer jacket layer is comprised of:

fluororubber, carboxyl-terminated liquid fluororubber, chlorosulfonated polyethylene rubber, ethylene-vinyl acetate copolymer, magnesium aluminum hydrotalcite, magnesium hydroxide, aluminum hydroxide, carbon fiber, microcrystalline wax, zinc stearate, glycidyl methacrylate, a crosslinking agent DCP, a crosslinking agent TAIC and an auxiliary crosslinking agent OV-POSS.

3. The optical fiber composite shore power cable according to claim 1, wherein the reinforcing layer is woven from fiber ropes, and the material of the fiber ropes is selected from any one of aramid fiber, nylon fiber, polypropylene fiber, acrylic fiber, orlon fiber, vinylon fiber, and polyimide fiber.

4. The fiber optic composite shore power cable of claim 1, wherein the power line unit is comprised of a power line conductor and a power line insulation layer;

the ground unit is composed of a ground conductor and a ground insulating layer.

5. The optical fiber composite shore power cable according to claim 4, wherein said power conductor and said ground conductor are formed by twisting a plurality of copper wires or aluminum alloy wires having a monofilament diameter of 0.3mm or less with a short pitch.

6. The optical fiber composite shore power cable according to claim 4, wherein the power line insulating layer and the ground line insulating layer are made of the same material and are made of any one of natural rubber, butadiene rubber, styrene butadiene rubber, butyl rubber, ethylene propylene rubber and silicon rubber;

and the diameters of the power line unit and the ground line unit are the same.

7. The optical fiber composite shore power cable according to claim 1, wherein the signal line unit is composed of a signal line tensile core, a signal line conductor, a signal line insulating layer, and a signal line shielding layer.

8. The optical fiber composite shore power cable according to claim 7, wherein the signal line conductor is a plurality of copper wires with monofilament diameter of 0.2mm or less, the signal line conductor is spirally wound around the signal line tensile core, and the distance of the signal line conductor spirally wound around the signal line tensile core for one circle is 2-4 times of the diameter of the signal line conductor.

9. The optical fiber composite shore power cable according to claim 1, wherein said optical fiber unit is composed of bare optical fiber, a first loose tube, tensile fiber, a second loose tube, a teflon film layer, a spiral metal tape tube, and a metal braid;

optical fiber paste is filled in the first loose sleeve and between the first loose sleeve and the second loose sleeve;

the tensile fibers are distributed in the first loose tube and between the first loose tube and the second loose tube.

10. The fiber optic composite shore power cable of claim 9, wherein said fiber paste consists of:

silicon-based oil, polyol ester, silane coupling agent modified silicon dioxide aerogel, hydrogenated (styrene/isoprene) copolymer, microcrystalline paraffin, antioxidant, expansion powder and oleic acid.

Technical Field

The invention relates to the technical field of power cables, in particular to an optical fiber composite shore power cable.

Background

Still personnel remain on the ship after the ship is landed, and fuel oil power generation is used in the past to ensure the daily life needs of the personnel, but the fuel oil power generation can bring atmospheric environmental pollution, so a cable for connecting the ship and a wharf power supply box is used in large quantity, and the cable is commonly called as a shore power cable. The shore power cable provides clean electric energy for personnel to continue working and living on the ship when the ship only leans on the shore, so that the use cost is obviously reduced, and the problem of environmental pollution is avoided. In general, a shore power cable is wound around a reel, and after a ship comes to a shore, the cable is pulled out from the reel and is connected to a power supply box on the shore of a wharf.

In order to meet the requirement of informatization, the shore power cable containing the optical fiber appears in succession, but the prior art is only simple to place the optical fiber in the cable, and does not provide a scheme for solving the reliability of the optical fiber, and in the use process that the cable is stretched and bent for many times, the optical fiber is easy to break, the transmission performance of the optical fiber cannot be guaranteed, and the shore power cable is often corroded by salt and alkali, so that the mechanical property is reduced, and the use is influenced.

Disclosure of Invention

The purpose of the invention is as follows: in response to the above-identified deficiencies in the art or needs for improvement, the present invention provides a fiber optic composite shore power cable.

The technical scheme adopted by the invention is as follows:

an optical fiber composite shore power cable comprises an outer sheath layer, a reinforcing layer, a plurality of power line units, a ground line unit, a plurality of signal line units and an optical fiber unit;

the number of the power line units can be selected from 3, 5, 7 and other odd numbers, preferably 3, and the number of the signal line units is 2, 4, 8 and other even numbers, preferably 4.

The reinforced layer is positioned on the inner side of the outer sheath layer, and the reinforced layer and the outer sheath layer jointly coat the power line unit, the ground wire unit, the signal line unit and the optical fiber unit.

Further, the outer sheath layer is composed of the following components:

fluororubber, carboxyl-terminated liquid fluororubber, chlorosulfonated polyethylene rubber, ethylene-vinyl acetate copolymer, magnesium aluminum hydrotalcite, magnesium hydroxide, aluminum hydroxide, carbon fiber, microcrystalline wax, zinc stearate, glycidyl methacrylate, a crosslinking agent DCP, a crosslinking agent TAIC and an auxiliary crosslinking agent OV-POSS.

Furthermore, the outer sheath layer comprises the following components in parts by weight:

60-80 parts of fluororubber, 20-30 parts of carboxyl-terminated liquid fluororubber, 20-40 parts of chlorosulfonated polyethylene rubber, 10-20 parts of ethylene-vinyl acetate copolymer, 10-20 parts of magnesium aluminum hydrotalcite, 5-10 parts of magnesium hydroxide, 5-10 parts of aluminum hydroxide, 1-5 parts of carbon fiber, 1-2 parts of microcrystalline wax, 0.1-0.2 part of zinc stearate, 0.1-0.2 part of glycidyl methacrylate, 0.2-0.3 part of crosslinking agent DCP, 0.1-0.2 part of crosslinking agent TAIC and 0.1-0.2 part of assistant crosslinking agent OV-POSS.

The performance test of the outer sheath layer conforms to the CEI 20.11M1, VDE 0207-24HM2, BS 6724, BS7655LTS1 and LTS3, OVEK-81-9MIN2 and Cenelec HD624.7S1 test standards.

Further, the reinforcing layer is woven by fiber ropes, and the material of the fiber ropes is selected from any one of aramid fibers, nylon fibers, polypropylene fibers, acrylic fibers, orlon fibers, vinylon fibers and polyimide fibers.

Further, the power line unit consists of a power line conductor and a power line insulating layer;

the ground unit is composed of a ground conductor and a ground insulating layer.

Furthermore, the power line conductor and the ground line conductor are formed by twisting a plurality of copper wires or aluminum alloy wires with the monofilament diameter of less than or equal to 0.3mm in a short pitch;

the power line insulating layer and the ground line insulating layer are made of the same material and are made of any one of natural rubber, butadiene rubber, styrene butadiene rubber, butyl rubber, ethylene propylene rubber and silicon rubber;

the diameters of the power line unit and the ground line unit are the same;

the power line unit and the ground line unit are of a short-pitch stranding structure, the stranding pitch diameter ratio is smaller than or equal to 10, the optical fiber unit is located in the centers of the power line unit and the ground line unit, the signal line unit is located on the outer side, and the reinforcing layer is formed by weaving fiber ropes after stranding.

Furthermore, the signal line unit is composed of a signal line tensile core, a signal line conductor, a signal line insulating layer and a signal line shielding layer, wherein the signal line insulating layer is positioned on the inner side of the signal line shielding layer, and the signal line tensile core and the signal line conductor are coated by the signal line insulating layer and the signal line shielding layer together.

Furthermore, the signal line conductor is a plurality of copper wires with the monofilament diameter less than or equal to 0.2mm, the signal line conductor is spirally wound around the signal line tensile core, and the distance of the signal line conductor spirally wound around the signal line tensile core for one circle is 2-4 times of the diameter of the signal line conductor.

The signal wire shielding layer wraps a layer of shielding layer outside the signal wire conductor to play an anti-interference role, the common shielding layer is a woven copper mesh or copper foil (aluminum), and the shielding layer needs to be grounded when in use, so that an external interference signal is guided into the ground by the shielding layer, and the interference signal is prevented from entering the inner conductor to increase the loss of signal transmission.

The signal line is used for transmitting high-frequency electric signals, so the material of the signal line insulating layer should have low dielectric loss and certain rigidity so as to avoid signal reflection caused by deformation in the twisting process and influence the transmission distance and speed of the signals, and the material of the signal line insulating layer should preferably be cross-linked polyethylene, tetrafluoroethylene, ethylene propylene rubber and silicon rubber.

Furthermore, the optical fiber unit consists of an optical fiber bare fiber, a first loose tube, a tensile fiber, a second loose tube, a Teflon film layer, a metal belt spiral tube and a metal braid layer;

optical fiber paste is filled in the first loose sleeve and between the first loose sleeve and the second loose sleeve;

the tensile fibers are distributed in the first loose tube and between the first loose tube and the second loose tube.

Wherein, the tensile fiber is preferably Kevlar fiber.

The first loose tube and the second loose tube are preferably made of PBT materials.

Further, the optical fiber paste consists of the following components:

silicon-based oil, polyol ester, silane coupling agent modified silicon dioxide aerogel, hydrogenated (styrene/isoprene) copolymer, microcrystalline paraffin, antioxidant, expansion powder and oleic acid.

Further, the optical fiber paste consists of the following components:

60-70 parts of silicon-based oil, 5-15 parts of polyol ester, 2-5 parts of silane coupling agent modified silicon dioxide aerogel, 1-3 parts of hydrogenated (styrene/isoprene) copolymer, 0.5-1 part of microcrystalline wax, 0.2-0.6 part of antioxidant, 0.3-0.8 part of expansion powder and 0.01-0.015 part of oleic acid.

The preparation method of the silane coupling agent modified silica aerogel comprises the following steps:

adding silicon dioxide aerogel into toluene, performing ultrasonic dispersion for 30min, adding a silane coupling agent, continuing performing ultrasonic treatment for 5min, heating to reflux, stirring for reaction for 5h, performing suction filtration, washing the obtained solid ethanol for 2 times, and performing vacuum drying.

The silane coupling agent is selected from A-143, A-151, A-171, A-174, A-186, A-189, A-1100, A-1120, A-1160.

The invention has the beneficial effects that:

the invention provides an optical fiber composite shore power cable, which consists of an outer sheath layer, a reinforcing layer, a power line unit, a ground line unit, a signal line unit and an optical fiber unit, wherein the optical fiber unit is arranged at the center of the cable to ensure the stability of the cable, and is protected by double layers of optical fiber paste, the optical fiber paste has proper consistency, high temperature resistance and good thermal stability, can effectively protect bare optical fibers when encountering high temperature or mechanical pressure and ensure the transmission performance of the optical fibers, the bare optical fibers are in a macroscopic 'suspension' state under the combined action of the optical fiber paste and tensile fibers, the bare optical fibers have enough buffer space and are not influenced by external force when the cable is bent, a first loose tube and a second loose tube can also keep excellent dimensional stability in the manufacturing and running processes of the cable and improve the running reliability of the optical fibers, and a plurality of tensile fibers are arranged at the periphery of the first loose tube, the first loose tube is in a macroscopic 'suspension' state, the double-layer 'suspension' state can effectively protect the internal optical fiber bare fiber, the dynamic bending test is carried out under the bending radius which is 4 times of the outer diameter of the cable, the bending frequency exceeds 5 ten thousand times of the optical fiber bare fiber core breaking, the hydroxyl of the silane coupling agent can react with the surface active group of the silicon dioxide aerogel to form a hydrogen bond, and then the hydrogen bond is condensed to form a covalent bond, so that the silane coupling agent is stably combined with the silicon dioxide aerogel, the hydrogen bond which is generated in succession is coated on the surface of the silicon dioxide aerogel, and the hydrogen bond is formed between the silicon dioxide aerogel and a polar medium, so that the system is more stable, the oleic acid is used as the polar medium, the adjacent silicon dioxide aerogel can be bridged, the dispersibility is improved, the consistency of the system is proper due to the addition of the oleic acid, the protection of the optical fiber is more favorable, and the outermost outer sheath layer can play a good protection role on the whole cable, the optical fiber composite shore power cable has the advantages of good fire resistance, flame retardance, salt-alkali corrosion resistance, water resistance, moisture resistance and high mechanical strength, has the performances of aging resistance, salt mist resistance, wear resistance, bending resistance and tensile strength, can simultaneously transmit electric signals and optical signals, has reliable guarantee on the transmission performance of optical fibers, and can meet the requirements of information development at present and in the future.

Drawings

Fig. 1 is a schematic structural diagram of an optical fiber composite shore power cable according to the present invention;

FIG. 2 is a schematic structural diagram of a signal line unit;

FIG. 3 is a schematic structural view of an optical fiber unit;

the reference numbers in the figures represent respectively:

the cable comprises a 1-outer sheath layer, a 2-reinforcing layer, a 3-power line conductor, a 4-power line insulating layer, a 5-signal line unit, a 501-signal line shielding layer, a 502-signal line insulating layer, a 503-signal line conductor, a 504-signal line tensile core, a 6-optical fiber unit, a 601-metal braid layer, a 602-Teflon film layer, a 603-tensile fiber, a 604-first loose tube, a 605-optical fiber bare fiber, 606-optical fiber paste, a 607-second loose tube, a 608-metal belt spiral tube, a 7-ground wire insulating layer and an 8-ground wire conductor.

Detailed Description

The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

Example 1:

an optical fiber composite shore power cable comprises an outer sheath layer, a reinforcing layer, 3 power line units, 1 ground line unit, 4 signal line units and 1 optical fiber unit;

the power line unit, the ground wire unit, the signal line unit and the reinforcing layer are arranged on the outer side of the outer sheath layer, the reinforcing layer is formed by weaving nylon fiber ropes after the twisting is finished, and the power line unit, the ground wire unit, the signal line unit and the optical fiber unit are coated together by the reinforcing layer.

The outer sheath layer comprises the following components in parts by weight:

70 parts of fluororubber, 20 parts of carboxyl-terminated liquid fluororubber, 25 parts of chlorosulfonated polyethylene rubber, 10 parts of ethylene-vinyl acetate copolymer, 12 parts of magnesium-aluminum hydrotalcite, 5 parts of magnesium hydroxide, 10 parts of aluminum hydroxide, 1 part of carbon fiber, 2 parts of microcrystalline wax, 0.1 part of zinc stearate, 0.15 part of glycidyl methacrylate, 0.2 part of DCP (dicumyl peroxide) crosslinking agent, 0.1 part of TAIC (TAIC) crosslinking agent and 0.1 part of OV-POSS (over vinyl cyanide) crosslinking assistant.

Through tests, the tensile strength is 21.3MPa, the elongation at break is 435%, the oxygen index is 32%, the water absorption rate at room temperature for 24 hours is less than or equal to 0.1%, and the thermal shock test (150 +/-2 ℃): no cracking, low temperature impact test (-40 +/-2 ℃): no cracking.

The power line unit consists of a power line conductor and a power line insulating layer, the ground line unit consists of a ground line conductor and a ground line insulating layer, the power line conductor and the ground line conductor are formed by stranding copper wires with the monofilament diameter of 0.3mm at short pitches, and the power line insulating layer and the ground line insulating layer are both made of ethylene propylene rubber; the diameters of the power line unit and the ground line unit are the same;

the signal line unit is by the tensile core of signal line, the signal line conductor, the signal line insulating layer, the signal line shielding layer is constituteed, the signal line insulating layer is located the signal line shielding layer inboard, both are the tensile core of signal line jointly, the cladding of signal line conductor, wherein, the signal line conductor is the copper wire of diameter 0.2mm, signal line conductor spiral winding is around the tensile core of signal line, the distance that signal line conductor spiral winding moved ahead a week at the tensile core of signal line is 4 times of signal line conductor diameter, the signal line shielding layer is for weaving the copper mesh, the signal line insulating layer is silicon rubber.

The optical fiber unit consists of optical fiber bare fibers, a first loose tube, Kevlar fibers, a second loose tube, a Teflon film layer, a metal belt spiral tube and a metal braid layer;

the bare optical fiber is positioned in the first loose tube, optical fiber paste is filled in the first loose tube and between the first loose tube and the second loose tube, and Kevlar fiber is distributed in the first loose tube and between the first loose tube and the second loose tube.

The optical fiber paste comprises the following components:

68 parts of silicon-based oil, 12 parts of polyol ester, 2 parts of silane coupling agent modified silicon dioxide aerogel, 1.5 parts of hydrogenated (styrene/isoprene) copolymer, 0.5 part of microcrystalline wax, 0.3 part of antioxidant, 0.5 part of expansion powder and 0.01 part of oleic acid.

The preparation method of the silane coupling agent modified silica aerogel comprises the following steps:

adding silicon dioxide aerogel into toluene, performing ultrasonic dispersion for 30min, adding silane coupling agent A-143, performing ultrasonic treatment for 5min, heating to reflux, stirring for reaction for 5h, performing suction filtration, washing the obtained solid ethanol for 2 times, and performing vacuum drying.

The prepared optical fiber composite shore power cable is fixed on a clamp of a swing testing machine, a certain load is added, the clamp swings left and right during testing, the disconnection rate of the optical fiber composite shore power cable is checked, or the total swinging times of the optical fiber composite shore power cable is checked until the optical fiber composite shore power cable cannot be electrified, dynamic bending testing is carried out under the bending radius which is 4 times of the outer diameter of the optical fiber composite shore power cable after testing, and the bending times exceed 5 ten thousand times of the optical fiber bare fiber core breaking.

Example 2:

the same as example 1 except that the outer sheath layer was composed of the following components in parts by weight:

80 parts of fluororubber, 25 parts of carboxyl-terminated liquid fluororubber, 20 parts of chlorosulfonated polyethylene rubber, 10 parts of ethylene-vinyl acetate copolymer, 10 parts of magnesium-aluminum hydrotalcite, 5 parts of magnesium hydroxide, 6 parts of aluminum hydroxide, 3 parts of carbon fiber, 1 part of microcrystalline wax, 0.12 part of zinc stearate, 0.2 part of glycidyl methacrylate, 0.2 part of DCP (dicumyl peroxide) crosslinking agent, 0.1 part of TAIC (TAIC) crosslinking agent and 0.1 part of OV-POSS (over vinyl cyanide) crosslinking assistant.

Through tests, the tensile strength is 21.1MPa, the elongation at break is 425%, the oxygen index is 31%, the water absorption rate at room temperature for 24 hours is less than or equal to 0.1%, and the thermal shock test (150 +/-2 ℃): no cracking, low temperature impact test (-40 +/-2 ℃): no cracking.

The optical fiber paste comprises the following components:

60 parts of silicon-based oil, 15 parts of polyol ester, 4 parts of silane coupling agent modified silicon dioxide aerogel, 1 part of hydrogenated (styrene/isoprene) copolymer, 0.6 part of microcrystalline wax, 0.2 part of antioxidant, 0.5 part of expansion powder and 0.01 part of oleic acid.

The preparation method of the silane coupling agent modified silica aerogel comprises the following steps:

adding silicon dioxide aerogel into toluene, performing ultrasonic dispersion for 30min, adding silane coupling agent A-151, performing ultrasonic treatment for 5min, heating to reflux, stirring for reaction for 5h, performing suction filtration, washing the obtained solid with ethanol for 2 times, and vacuum drying.

The prepared optical fiber composite shore power cable is fixed on a clamp of a swing testing machine, a certain load is added, the clamp swings left and right during testing, the disconnection rate of the optical fiber composite shore power cable is checked, or the total swinging times of the optical fiber composite shore power cable is checked until the optical fiber composite shore power cable cannot be electrified, dynamic bending testing is carried out under the bending radius which is 4 times of the outer diameter of the optical fiber composite shore power cable after testing, and the bending times exceed 5 ten thousand times of the optical fiber bare fiber core breaking.

Example 3:

the same as example 1 except that the outer sheath layer was composed of the following components in parts by weight:

60 parts of fluororubber, 20 parts of carboxyl-terminated liquid fluororubber, 20 parts of chlorosulfonated polyethylene rubber, 10 parts of ethylene-vinyl acetate copolymer, 10 parts of magnesium-aluminum hydrotalcite, 5 parts of magnesium hydroxide, 5 parts of aluminum hydroxide, 1 part of carbon fiber, 1 part of microcrystalline wax, 0.1 part of zinc stearate, 0.1 part of glycidyl methacrylate, 0.2 part of DCP (dicumyl peroxide) crosslinking agent, 0.1 part of TAIC (TAIC) crosslinking agent and 0.1 part of OV-POSS (over vinyl cyanide) crosslinking assistant.

Through tests, the tensile strength is 21.0MPa, the elongation at break is 420%, the oxygen index is 32%, the water absorption rate at room temperature for 24 hours is less than or equal to 0.1%, and the thermal shock test (150 +/-2 ℃): no cracking, low temperature impact test (-40 +/-2 ℃): no cracking.

The optical fiber paste comprises the following components:

70 parts of silicon-based oil, 12 parts of polyol ester, 5 parts of silane coupling agent modified silicon dioxide aerogel, 2 parts of hydrogenated (styrene/isoprene) copolymer, 0.5 part of microcrystalline wax, 0.6 part of antioxidant, 0.7 part of expansion powder and 0.015 part of oleic acid.

The preparation method of the silane coupling agent modified silica aerogel comprises the following steps:

adding silicon dioxide aerogel into toluene, performing ultrasonic dispersion for 30min, adding silane coupling agent A-171, performing ultrasonic treatment for 5min, heating to reflux, stirring for reaction for 5h, performing suction filtration, washing the obtained solid with ethanol for 2 times, and vacuum drying.

The prepared optical fiber composite shore power cable is fixed on a clamp of a swing testing machine, a certain load is added, the clamp swings left and right during testing, the disconnection rate of the optical fiber composite shore power cable is checked, or the total swinging times of the optical fiber composite shore power cable is checked until the optical fiber composite shore power cable cannot be electrified, dynamic bending testing is carried out under the bending radius which is 4 times of the outer diameter of the optical fiber composite shore power cable after testing, and the bending times exceed 5 ten thousand times of the optical fiber bare fiber core breaking.

Example 4:

the same as example 1 except that the outer sheath layer was composed of the following components in parts by weight:

80 parts of fluororubber, 30 parts of carboxyl-terminated liquid fluororubber, 40 parts of chlorosulfonated polyethylene rubber, 20 parts of ethylene-vinyl acetate copolymer, 20 parts of magnesium-aluminum hydrotalcite, 10 parts of magnesium hydroxide, 10 parts of aluminum hydroxide, 5 parts of carbon fiber, 2 parts of microcrystalline wax, 0.2 part of zinc stearate, 0.2 part of glycidyl methacrylate, 0.3 part of DCP (dicumyl peroxide) crosslinking agent, 0.2 part of TAIC (TAIC) crosslinking agent and 0.2 part of OV-POSS (over vinyl cyanide) crosslinking assistant.

Through tests, the tensile strength is 21.3MPa, the elongation at break is 422%, the oxygen index is 31%, the water absorption rate at room temperature for 24 hours is less than or equal to 0.1%, and the thermal shock test (150 +/-2 ℃): no cracking, low temperature impact test (-40 +/-2 ℃): no cracking.

The optical fiber paste comprises the following components:

60 parts of silicon-based oil, 5 parts of polyol ester, 2 parts of silane coupling agent modified silicon dioxide aerogel, 1 part of hydrogenated (styrene/isoprene) copolymer, 0.5 part of microcrystalline wax, 0.2 part of antioxidant, 0.3 part of expansion powder and 0.01 part of oleic acid.

The preparation method of the silane coupling agent modified silica aerogel comprises the following steps:

adding silicon dioxide aerogel into toluene, performing ultrasonic dispersion for 30min, adding silane coupling agent A-174, performing ultrasonic treatment for 5min, heating to reflux, stirring for reaction for 5h, performing suction filtration, washing the obtained solid with ethanol for 2 times, and vacuum drying.

The prepared optical fiber composite shore power cable is fixed on a clamp of a swing testing machine, a certain load is added, the clamp swings left and right during testing, the disconnection rate of the optical fiber composite shore power cable is checked, or the total swinging times of the optical fiber composite shore power cable is checked until the optical fiber composite shore power cable cannot be electrified, dynamic bending testing is carried out under the bending radius which is 4 times of the outer diameter of the optical fiber composite shore power cable after testing, and the bending times exceed 5 ten thousand times of the optical fiber bare fiber core breaking.

Example 5:

the same as example 1 except that the outer sheath layer was composed of the following components in parts by weight:

60 parts of fluororubber, 30 parts of carboxyl-terminated liquid fluororubber, 20 parts of chlorosulfonated polyethylene rubber, 20 parts of ethylene-vinyl acetate copolymer, 10 parts of magnesium-aluminum hydrotalcite, 10 parts of magnesium hydroxide, 5 parts of aluminum hydroxide, 5 parts of carbon fiber, 1 part of microcrystalline wax, 0.2 part of zinc stearate, 0.1 part of glycidyl methacrylate, 0.3 part of DCP (dicumyl peroxide) crosslinking agent, 0.1 part of TAIC (TAIC) crosslinking agent and 0.2 part of OV-POSS (over vinyl cyanide) crosslinking assistant.

Through tests, the tensile strength is 20.8MPa, the elongation at break is 420%, the oxygen index is 32%, the water absorption rate at room temperature for 24 hours is less than or equal to 0.1%, and the thermal shock test (150 +/-2 ℃): no cracking, low temperature impact test (-40 +/-2 ℃): no cracking.

The optical fiber paste comprises the following components:

70 parts of silicon-based oil, 15 parts of polyol ester, 5 parts of silane coupling agent modified silicon dioxide aerogel, 3 parts of hydrogenated (styrene/isoprene) copolymer, 1 part of microcrystalline wax, 0.6 part of antioxidant, 0.8 part of expansion powder and 0.015 part of oleic acid.

The preparation method of the silane coupling agent modified silica aerogel comprises the following steps:

adding silicon dioxide aerogel into toluene, performing ultrasonic dispersion for 30min, adding silane coupling agent A-189, performing ultrasonic treatment for 5min, heating to reflux, stirring for reaction for 5h, performing suction filtration, washing the obtained solid with ethanol for 2 times, and vacuum drying.

The prepared optical fiber composite shore power cable is fixed on a clamp of a swing testing machine, a certain load is added, the clamp swings left and right during testing, the disconnection rate of the optical fiber composite shore power cable is checked, or the total swinging times of the optical fiber composite shore power cable is checked until the optical fiber composite shore power cable cannot be electrified, dynamic bending testing is carried out under the bending radius which is 4 times of the outer diameter of the optical fiber composite shore power cable after testing, and the bending times exceed 5 ten thousand times of the optical fiber bare fiber core breaking.

Example 6:

the same as example 1 except that the outer sheath layer was composed of the following components in parts by weight:

80 parts of fluororubber, 20 parts of carboxyl-terminated liquid fluororubber, 40 parts of chlorosulfonated polyethylene rubber, 10 parts of ethylene-vinyl acetate copolymer, 20 parts of magnesium-aluminum hydrotalcite, 5 parts of magnesium hydroxide, 10 parts of aluminum hydroxide, 1 part of carbon fiber, 2 parts of microcrystalline wax, 0.1 part of zinc stearate, 0.2 part of glycidyl methacrylate, 0.2 part of DCP (dicumyl peroxide) crosslinking agent, 0.2 part of TAIC (TAIC) crosslinking agent and 0.1 part of OV-POSS (over vinyl cyanide) crosslinking assistant.

Through tests, the tensile strength is 21.0MPa, the elongation at break is 415%, the oxygen index is 31%, the water absorption rate at room temperature for 24 hours is less than or equal to 0.1%, and the thermal shock test (150 +/-2 ℃): no cracking, low temperature impact test (-40 +/-2 ℃): no cracking.

The optical fiber paste comprises the following components:

60 parts of silicon-based oil, 15 parts of polyol ester, 2 parts of silane coupling agent modified silicon dioxide aerogel, 3 parts of hydrogenated (styrene/isoprene) copolymer, 0.5 part of microcrystalline wax, 0.6 part of antioxidant, 0.3 part of expansion powder and 0.015 part of oleic acid.

The preparation method of the silane coupling agent modified silica aerogel comprises the following steps:

adding silicon dioxide aerogel into toluene, performing ultrasonic dispersion for 30min, adding silane coupling agent A-143, performing ultrasonic treatment for 5min, heating to reflux, stirring for reaction for 5h, performing suction filtration, washing the obtained solid with ethanol for 2 times, and vacuum drying.

The prepared optical fiber composite shore power cable is fixed on a clamp of a swing testing machine, a certain load is added, the clamp swings left and right during testing, whether the bare optical fiber is broken or not is checked, or when the power cannot be supplied, the total swinging times of the bare optical fiber is checked, the bare optical fiber is dynamically bent and tested under the bending radius of 4 times of the outer diameter of the cable, and the bending times exceed 5 ten thousand times of the bare optical fiber and are not broken.

And (3) performance testing:

soaking the oversheath layer sample prepared in the embodiment 1-6 of the invention in a hydrothermal reaction kettle containing 1% hydrochloric acid and having the temperature of 60 ℃ and the pressure of 0.5MPa for 24 hours, taking out the sample, then putting the sample into an electrothermal constant-temperature air-blowing drying oven, aging the sample for 144 hours at the temperature of 100 ℃, and then testing the physical properties, wherein the tensile properties are measured according to GB/T528-2009 determination of tensile stress strain properties of vulcanized rubber or thermoplastic rubber; the mass change rate and volume change rate were measured according to GB/T1690-2010 "liquid resistance test method for vulcanized rubber or thermoplastic rubber", wherein "+" represents an increase and "-" represents a decrease, the results are shown in Table 1 below:

table 1:

as can be seen from the above table 1, the outer sheath layer of the present invention has good acid corrosion resistance and aging resistance, and can maintain its mechanical properties well after hot wind aging after high temperature and high pressure acid leaching.

The 1% hydrochloric acid in the test is replaced by 1% sodium hydroxide, and other conditions are unchanged, and the test is continued to find that the change rate of the tensile strength of the outer sheath layer is within-4%, the change rate of the elongation at break is within-6%, the change rate of the mass is within-1.5%, and the change rate of the volume is within + 8%, which indicates that the outer sheath layer also has good alkali corrosion resistance.

The 1% hydrochloric acid in the test is replaced by 1% sodium chloride, and other conditions are unchanged, and the test is continued to find that the change rate of the tensile strength of the outer sheath layer is within-2%, the change rate of the elongation at break is within-4%, the change rate of the mass is within-1%, and the change rate of the volume is within + 6%, which indicates that the outer sheath layer also has good salt corrosion resistance.

The optical fiber pastes prepared in examples 1 to 6 of the present invention were subjected to the performance test, and the results are shown in the following table 2:

table 2:

the flash point is one of indexes indicating the properties of a flammable liquid. Under the specified conditions, the ointment is heated, when the ointment reaches a certain temperature, the mixed gas of the hot vapor of the ointment and the ambient air, once in contact with the flame, causes the phenomenon of flash-fire, the lowest flash-fire temperature being called the flash point. The test adopts an open cup flash point method, and measures the flash point of the optical fiber paste according to the national standard GB/T287-88.

The dropping point is an index reflecting the thermal properties of the optical fiber paste, and the temperature at which the paste is heated under a prescribed condition and becomes soft as the temperature increases is called the dropping point. Ointment loses its function when it melts into a liquid. The drop point height represents the heating degree of the optical fiber paste in use, and the drop point measurement is carried out according to the national standard GB 4929-85.

The penetration is a quality index reflecting the softness and hardness degree of the optical fiber paste, and the definition of the penetration is as follows: at 25℃, a standard cone with a total load of 150 g. + -. 0.25g was passed vertically through the paste to a depth of 1/10mm within 5s, with a high cone penetration indicating a soft, low consistency paste.

The main component of the optical fiber paste is silicon-based oil, the common optical fiber paste can separate oil when being mechanically extruded or heated, so that the optical fiber paste is deteriorated, but the porous silane coupling agent modified silica aerogel is used in the invention, the oil can be discharged when being mechanically extruded or heated, the oil is just like water flowing out when sponge is extruded, and after the mechanical extrusion or the heating is removed, the oil is absorbed back into the silane coupling agent modified silica aerogel.

The acid value of the fiber paste is indicative of the free acid content of the paste. The acid value is determined by the milligrams of potassium hydroxide required to neutralize 1g of ointment, mgKOH/g alone, and the acid value is measured according to GB/T264-83. The optical fiber paste has partial acidic components, has a certain acid value which is normal, but the acid value is too large, which indicates that the content of free acid is too large, and the optical fiber paste has the possibility of generating corrosion action on an optical fiber coating layer and a beam tube material.

The influence of hydrogen on the loss of the optical fiber is a traditional subject, and as early as the early 80 s, people find that the reversible or permanent loss increase of the optical fiber is caused by the invasion of hydrogen molecules into the optical fiber, and when the hydrogen molecules invade the optical fiber to reach a certain partial pressure, the loss of the optical fiber is increased; the partial pressure is reduced, the loss is reduced after hydrogen molecules escape, and the hydrogen evolution value of the optical fiber paste is less than or equal to 0.001 mu L/g and is far less than the current standard of 0.1 mu L/g.

In summary, as shown in table 2 above: the optical fiber pastes prepared in the embodiments 1 to 6 of the present invention have high flash point and dropping point, proper consistency, and low acid value and hydrogen evolution value.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.