WO2022068037A1 - Photoelectric composite medium-voltage shore power cable, and manufacturing process therefor - Google Patents

Abstract

A photoelectric composite medium-voltage shore power cable (1). The photoelectric composite medium-voltage shore power cable (1) comprises a cable core (10), an inner sheath layer (20), a reinforcing layer (30) and an outer sheath layer (40), which are sequentially arranged from inside to outside, wherein the inner sheath layer (20) is wrapped around the cable core (10), the reinforcing layer (30) is wrapped around the inner sheath layer (20), and the outer sheath layer (40) is wrapped around the reinforcing layer (30); and the cable core (10) comprises three power wire cores (11) and flexible optical units (12), the three power wire cores (11) being arranged in a parallel contact manner and are flat, a gap (110) being formed between every two adjacent power wire cores (11) and the inner sheath layer (20), and the flexible optical units (12) being embedded in the gaps (110) and in contact with the two adjacent power wire cores (11). A manufacturing process for the photoelectric composite medium-voltage shore power cable (1) can provide a higher power transmission capacity, reduce the bending radius of the cable, improve the flexibility of the cable, and improve the current carrying capacity of the cable while achieving an optical communication transmission function.

Description

Photoelectric composite medium voltage shore power cable and its manufacturing process technical field

The invention relates to the field of cables, in particular to a photoelectric composite medium-voltage shore power cable and a manufacturing process thereof.

Background technique

The biggest advantage of shipping over train or automobile transportation is the large loading capacity and low cost. In recent years, the cargo throughput of the major coastal ports has seen obvious development. The goods are loaded and unloaded by large mobile loading and unloading equipment such as cranes, gantry cranes, and shore cranes, which requires shore power cables to provide higher power transmission capacity. Ships usually use fuel oil products to generate electricity to meet the ship's electricity needs when they are in port, but heavy oil and diesel will produce a large amount of sulfide and nitrogen oxides during the combustion process, causing pollution to the surrounding environment. At the same time, the diesel generator set used by the ship is running It will also cause noise pollution to the environment, which requires a shore power system to avoid the use of fuel products to generate electricity. At the same time, with the development of digital and intelligent monitoring and communication functions, the current single-function shore power cables can no longer meet the needs of development.

SUMMARY OF THE INVENTION

In view of this, it is necessary to provide an optoelectronic composite medium-voltage shore power cable and its manufacturing process, which can provide higher power transmission capacity, reduce the bending radius of the cable, and improve the flexibility of the cable under the condition of realizing the optical communication transmission function. Improve the current carrying capacity of the cable.

One aspect of the present application provides a photoelectric composite medium voltage shore power cable, the photoelectric composite medium voltage shore power cable includes a cable core, an inner sheath layer, a reinforcing layer and an outer sheath layer sequentially arranged from the inside to the outside. an inner sheath layer is wrapped around the outside of the cable core, the reinforcing layer is wrapped around the outside of the inner sheath layer, and the outer sheath layer is wrapped around the outside of the reinforcing layer;

The cable core includes three power cores and a flexible optical unit, the three power cores are arranged in parallel contact and are flat, and a gap is formed between each adjacent two power cores and the inner sheath layer , the flexible light unit is embedded in the gap and is in contact with the two adjacent power wire cores.

Preferably, the cable core further includes a flexible ground wire core, the flexible ground wire core and the flexible optical unit are respectively embedded in different gaps, and the flexible ground wire core is connected to two adjacent ones. The power cores are in contact.

Preferably, the number of the flexible ground wire cores is two, and the two flexible ground wire cores are respectively embedded in different adjacent two power wire cores and the inner sheath layer. in different gaps.

Preferably, each power wire core includes a flexible power conductor core, a semiconducting tape conductor shielding layer, a semiconducting extruded conductor shielding layer, a high electrical performance rubber insulating layer, and a semiconducting extruded insulating layer, which are sequentially arranged from inside to outside. Shielding layer, semiconducting tape insulating shielding layer and multi-strand metal wire braided flexible insulating shielding layer.

Preferably, the flexible power conductor core adopts the technology of conductor co-directional grouping and twisting and integral twisting.

Preferably, the flexible grounding wire core includes a flexible grounding conductor core and a semi-conductive rubber insulating layer arranged in sequence from the inside to the outside, and the semi-conductive rubber insulating layer is in contact with two adjacent power wire cores.

Preferably, the inner sheath layer is a flame-retardant thermoplastic elastomer inner sheath layer, the reinforcing layer is a flexible high-strength fiber braided reinforcing layer, and the outer sheath layer is an oil-resistant flame-retardant outer sheath layer. .

Preferably, the flexible optical unit comprises a high temperature resistant single-mode/multi-mode optical fiber, a flexible high-strength fiber reinforced core and a flame-retardant thermoplastic sheath layer.

Preferably, the cable core further includes a flexible control core unit, the flexible control core unit, the flexible grounding core and the flexible optical unit are respectively embedded in different gaps, and the flexible The control wire core unit is in contact with the two adjacent power wire cores.

Preferably, the flexible control wire core unit includes a flexible control conductor core, a flexible rubber insulating layer and an aluminum-plastic composite tape wrapping shielding layer.

Another aspect of the present application provides a manufacturing process for a photoelectric composite medium voltage shore power cable, the manufacturing process for the photoelectric composite medium voltage shore power cable includes:

Provide three power cores;

The three power cores are arranged in parallel contact and have a flat structure;

The flexible light unit is embedded in the gap formed by the two adjacent power wire cores, and is in contact with the two adjacent power wire cores;

A flame-retardant thermoplastic elastomer is extruded on the surface of the flat structure formed by the three power wire cores and the flexible light unit to form an inner sheath layer;

Weaving flexible high-strength fibers on the inner jacket layer to form a reinforcement layer;

An outer sheath layer is formed by extruding an oil-resistant flame retardant material on the reinforcing layer.

In this case, three of the power wire cores are arranged in parallel contact and in a flat shape, a gap is formed between every two adjacent power wire cores and the inner sheath layer, and the flexible light unit is embedded in the gap And the contact with the two adjacent power cores can provide higher power transmission capacity, reduce the cable bending radius, improve the flexibility of the cable, and improve the current carrying capacity of the cable under the condition of realizing the optical communication transmission function. ability.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. For those of ordinary skill, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic diagram of a photoelectric composite medium-voltage shore power cable provided by a preferred embodiment of the present invention.

FIG. 2 is a flow chart of a manufacturing process of a photoelectric composite medium voltage shore power cable according to a preferred embodiment of the present invention.

The following specific embodiments will further illustrate the present invention in conjunction with the above drawings.

Description of main component symbols

Photoelectric composite medium voltage shore power cable 1

Cable core 10

Inner sheath 20

Reinforcing layer 30

Outer jacket 40

Power core 11

Flexible light unit 12

Gap 110

Flexible grounding core 13

Flexible power conductor core 111

Semi-conductive tape conductor shield 112

Semiconducting Extruded Conductor Shielding 113

High electrical performance rubber insulating layer 114

Semi-conductive extruded insulating shield 115

Semi-conductive tape with insulating shielding layer 116

Wire Braided Flexible Insulation Shield 117

Ground conductor core 131

Semi-conductive rubber insulation 132

High temperature single mode/multimode fiber 121

Flexible high-strength fiber reinforced core 122

Flame retardant thermoplastic jacket 123

Flexible control core unit 14

Control conductor core 141

Flexible rubber insulation 142

Aluminum-plastic composite tape wrapping shielding layer 143

The following specific embodiments will further illustrate the present invention in conjunction with the above drawings.

Detailed ways

In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

In the following description, many specific details are set forth in order to facilitate a full understanding of the present invention, and the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

FIG. 1 is a schematic diagram of a photoelectric composite medium-voltage shore power cable provided by a preferred embodiment of the present invention. The optoelectronic composite medium-voltage shore power cable 1 includes a cable core 10, an inner sheath layer 20, a reinforcing layer 30 and an outer sheath layer 40 which are sequentially arranged from the inside to the outside. The inner sheath layer 20 is wrapped around the cable core. 10 , the reinforcing layer 30 is wrapped on the outside of the inner jacket layer 20 , and the outer jacket layer 40 is wrapped on the outside of the reinforcing layer 30 . The cable core 10 includes three power cores 11 and a flexible optical unit 12. The three power cores 11 are arranged in parallel contact and are flat, and each adjacent two power cores 11 and the inner sheath A gap 110 is formed between the layers 20 , and the flexible light unit 12 is embedded in the gap 110 and is in contact with the two adjacent power wire cores 11 .

In this embodiment, the cable core 10 further includes a flexible ground wire core 13 . The flexible light unit 12 and the flexible ground wire cores 13 are respectively embedded in different gaps 110 , and the flexible ground wire cores 13 are in contact with two adjacent power wire cores 11 . This case can reduce the bending radius of the cable, improve the flexibility of the cable, and improve the current-carrying capacity of the cable under the condition of realizing the grounding function.

In this embodiment, the number of the flexible grounding wire cores 13 is two, that is, two-core grounding wires. The two flexible ground wire cores 13 are respectively embedded in different gaps 110 formed between the two adjacent power wire cores 11 and the inner jacket layer 20 . In this case, the large size of a single grounding core can be avoided, and the overall size of the photoelectric composite medium-voltage shore power cable 1 is not increased.

In this embodiment, each power wire core 11 includes a flexible power conductor core 111 , a semiconducting tape conductor shielding layer 112 , a semiconducting extruded conductor shielding layer 113 , and a high-electrical performance rubber insulating layer, which are sequentially arranged from inside to outside. 114 , a semiconducting extruded insulating shielding layer 115 , a semiconducting tape insulating shielding layer 116 and a multi-strand metal wire braided flexible insulating shielding layer 117 . The semiconducting tape conductor shielding layer 112 and the semiconducting extruding conductor shielding layer 113 form a combined conductor shielding structure, which improves the uniformity of electric field distribution on the surface of the power conductor core. The semi-conductive extruded insulating shielding layer 115 is extruded and closely adhered to the outer surface of the high-electrical performance rubber insulating layer 114 , which improves the uniformity of electric field distribution on the outer surface of the high-electrical-performance rubber insulating layer 114 . The semi-conductive extruded conductor shielding layer 113, the high-electrical performance rubber insulating layer 114 and the semi-conductive extruded insulating shielding layer 115 adopt three-layer co-extrusion and continuous online cross-linking technology to fully ensure their concentricity and cross-linking. The uniformity of the connection, as well as the uniformity and stability of the electric field distribution in the high-electrical performance rubber insulating layer 114 . The semiconductive tape insulating shielding layer 116 and the metal wire braided flexible insulating shielding layer 117 are in full contact, and together with the semiconducting extruded insulating shielding layer 115, together form an insulating outer shielding layer, which fully guarantees the The uniformity of the electric field distribution on the outer surface of the high electrical performance rubber insulating layer 114 and the good conductivity of the induced current.

In this embodiment, the flexible power conductor core 111 includes a multi-stranded flexible copper wire conductor. The flexible power conductor core 111 adopts the technology of conductor co-directional group twist and integral double twist. In this embodiment, the flexible power conductor core 111 adopts 5 types of annealed oxygen-free copper wires in the same direction grouped untwisting and twisting and overall untwisting and re-twisting technology, and the twisting pitch is controlled at 10-15 times outside the conductor between the diameters. In this case, the internal stress of the photoelectric composite medium-voltage shore power cable 1 is effectively eliminated through the same-direction group untwisting and twisting and the overall untwisting and re-twisting method, which effectively eliminates the internal stress of the photoelectric composite medium-voltage shore power cable 1, avoids the twisting phenomenon of the finished product, and improves the core arrangement and The flatness of the cable as a whole.

The semiconducting tape conductor shielding layer 112 adopts an overlapping wrapping structure, and the overall average thickness is about 0.1-0.3 mm. The semi-conductive extruded conductor shielding layer 113 adopts extrusion technology and has a thickness of about 0.6-1.0 mm. The high electrical performance rubber insulating layer 114 is made of EPR (Ethylene Propylene Rubber) insulating material, and has the characteristics of high electrical performance, softness, low smoke and halogen free. The semi-conductive extruded insulating shielding layer 115 is made of peelable semi-conductive layer electrical material, and the thickness is about 0.8-1.2 mm. The semi-conductive wrapping tape insulating shielding layer 116 adopts an overlapping wrapping structure, and the overall average thickness is about 0.1-0.3 mm. The multi-strand metal wire braided flexible insulating shielding layer 117 adopts the multi-strand flexible tinned copper wire weaving technology, and the weaving coverage density is greater than or equal to 90%.

In this embodiment, the flexible grounding wire core 13 includes a grounding conductor core 131 and a semiconducting rubber insulating layer 132 that are sequentially arranged from the inside to the outside. The semi-conductive rubber insulating layer 132 is in contact with the two adjacent power wire cores 11 . In this embodiment, the grounding conductor core 131 adopts the technology of 5 types of annealed oxygen-free copper wires in the same direction grouping and twisting and overall twisting, and the twisting pitch is controlled between 10 and 15 times the outer diameter of the conductor. In this case, the semi-conductive rubber insulating layer 132 has a semiconductor conductivity, which is beneficial to realize the conduction between the flexible ground wire core 13 and the wire braided flexible insulating shielding layer 117 .

In this embodiment, the inner sheath layer 20 is a flame-retardant thermoplastic elastomer inner sheath layer, the reinforcing layer 30 is a flexible high-strength fiber braided reinforcing layer, and the outer sheath layer 40 is an oil-resistant type resistance Outer jacket layer. The flame-retardant thermoplastic elastomer inner sheath layer is extruded and wrapped outside the braided shielding layers of the three flat parallel insulated wire cores. In order to fully wrap and protect the wire cores, the extruded thickness is at least 0.8-1.2 mm. The flexible high-strength fiber braided reinforcing layer adopts a multi-strand flexible high-strength fiber braided structure, and the braided coverage density is greater than or equal to 60%. The oil-resistant flame-retardant outer sheath layer is extruded and wrapped outside the flexible high-strength fiber braided reinforcing layer, and the extruded wrapping thickness is at least 1.0-1.4 mm. In this embodiment, if the optoelectronic composite medium voltage shore power cable 1 is a thermosetting sheathed cable, the entire optoelectronic composite medium voltage shore power cable 1 needs to be continuously vulcanized evenly by high-temperature steam, so that the outer sheath can be continuously vulcanized. The sleeve material is fully graft-crosslinked. In this case, the semiconductive wrapping conductor shielding layer 112 , the semiconducting extruded conductor shielding layer 113 , the high electrical performance rubber insulating layer 114 , the semiconducting extruded insulating shielding layer 115 , the semiconducting wrapping The insulating shielding layer 116, the flame-retardant thermoplastic elastomer inner sheath layer, the flexible high-strength fiber braided reinforcing layer, and the oil-resistant flame-retardant outer sheath layer are all non-metallic materials. The shore power cable 1 has flame retardant properties.

In this embodiment, the flexible optical unit 12 includes a high temperature resistant single-mode/multi-mode optical fiber 121 , a flexible high-strength fiber reinforced core 122 and a flame-retardant thermoplastic sheath layer 123 . In this case, the semiconductive wrapping conductor shielding layer 112 , the semiconducting extruded conductor shielding layer 113 , the high electrical performance rubber insulating layer 114 , the semiconducting extruded insulating shielding layer 115 , the semiconducting wrapping With insulating shielding layer 116, the flame-retardant thermoplastic elastomer inner sheath layer, the flexible high-strength fiber braided reinforcing layer, the oil-resistant flame-retardant outer sheath layer, the semi-conductive rubber insulating layer 132, the The flexible high-strength fiber reinforced core 122 and the flame-retardant thermoplastic sheath layer 123 are both non-metallic materials, so that the optoelectronic composite medium-voltage shore power cable 1 has flame-retardant properties as a whole.

In this embodiment, the cable core 10 further includes a flexible control wire core unit 14, and the flexible optical unit 12, the flexible ground wire core 13 and the flexible control wire core unit 14 are respectively embedded in different In the gap 110 , the flexible control wire core unit 14 is in contact with the two adjacent power wire cores 11 . This case can reduce the bending radius, improve the flexibility performance, and improve the current carrying capacity under the condition of realizing the control signal transmission function.

In this embodiment, the flexible control wire core unit 14 includes a control conductor core 141 , a flexible rubber insulating layer 142 and an aluminum-plastic composite tape wrapping shielding layer 143 . The control conductor core 141 adopts the conductor multi-strand untwisting technique. In this embodiment, the control conductor core 141 adopts the multi-strand untwisting twisting technology of Category 5 annealed oxygen-free copper wire, and the twisting pitch is controlled between 10 and 15 times the outer diameter of the conductor. In this case, the semiconductive wrapping conductor shielding layer 112 , the semiconducting extruded conductor shielding layer 113 , the high electrical performance rubber insulating layer 114 , the semiconducting extruded insulating shielding layer 115 , the semiconducting wrapping With insulating shielding layer 116, the flame-retardant thermoplastic elastomer inner sheath layer, the flexible high-strength fiber braided reinforcing layer, the oil-resistant flame-retardant outer sheath layer, the semi-conductive rubber insulating layer 132, the The flexible high-strength fiber reinforced core 122 , the flame-retardant thermoplastic sheath layer 123 , the flexible rubber insulating layer 142 and the aluminum-plastic composite tape wrapping shielding layer 143 are all non-metallic materials, so as to have a flexible control core unit 14 The photoelectric composite medium voltage shore power cable 1 has flame retardant properties.

FIG. 2 is a flow chart of a manufacturing process of a photoelectric composite medium voltage shore power cable according to a preferred embodiment of the present invention. The manufacturing process of the photoelectric composite medium voltage shore power cable includes:

S21: Provides three power cores.

S22: The three power wire cores are arranged in parallel contact and have a flat structure.

S23: The flexible light unit is embedded in the gap formed by the two adjacent power wire cores, and is in contact with the two adjacent power wire cores.

S24: Extruding a flame-retardant thermoplastic elastomer on the surface of the flat structure formed by the three power wire cores and the flexible light unit to form an inner sheath layer.

S25: Weaving flexible high-strength fibers on the inner sheath layer to form a reinforcement layer.

S26: Extruding the oil-resistant flame retardant material on the reinforcing layer to form an outer sheath layer.

In this embodiment, the manufacturing process of the photoelectric composite medium voltage shore power cable includes:

Provide high temperature single-mode/multi-mode fiber;

Winding flexible high-strength fibers on the surface of the high-temperature-resistant single-mode/multi-mode optical fiber to form a flexible high-strength fiber reinforced core;

A flame-retardant thermoplastic sheath is extruded on the surface of the flexible high-strength fiber-reinforced core to form a flame-retardant thermoplastic sheath.

In this embodiment, the flexible light unit is embedded in a gap formed by two adjacent power wire cores, and the contact with the two adjacent power wire cores includes:

The flexible ground wire core and the flexible light unit are respectively embedded in different gaps formed by any two adjacent power wire cores among the three power wire cores, and the flexible ground wire core and the flexible The light unit is in contact with the corresponding two adjacent power wire cores;

The forming of the inner sheath layer by extruding the sheath on the surface of the flat structure formed by the three power wire cores and the flexible light unit includes:

The inner sheath layer is formed by extruding a sheath on the surface of the flat structure formed by the three power wire cores, the flexible light unit and the flexible ground wire core.

In this embodiment, the manufacturing process of the photoelectric composite medium voltage shore power cable includes:

The two flexible ground wire cores are respectively embedded in different gaps formed by the two adjacent power wire cores.

In this embodiment, the manufacturing process of the photoelectric composite medium voltage shore power cable includes:

Provide flexible power core;

The surface of the flexible power core conductor is wrapped with a semiconducting shielding tape to form a semiconducting shielding layer;

Extruding the semiconducting shielding layer on the surface of the semiconducting shielding layer to form the semiconducting shielding layer;

A high-electric-performance rubber insulating layer is formed by extruding high-electric-performance rubber insulation on the surface of the semiconductor shielding layer;

A semi-conductive insulating shield is formed by extruding a semi-conductive insulating shield on the surface of the high-electrical performance rubber insulating layer;

wrapping a semiconducting shielding tape on the surface of the semiconducting insulating shielding layer to form a semiconducting insulating shielding layer;

A flexible metal wire is braided on the surface of the semiconducting insulating shielding layer to form a multi-strand metal wire braiding flexible insulating shielding layer.

In this embodiment, the manufacturing process of the photoelectric composite medium voltage shore power cable includes:

Provide flexible grounding core;

A semi-conductive rubber insulation layer is formed by extruding a semi-conductive rubber insulation on the surface of the conductor of the flexible grounding core, and the semi-conductive rubber insulation layer is in contact with the two adjacent power cores.

In this embodiment, the flexible light unit is embedded in a gap formed by two adjacent power wire cores, and the contact with the two adjacent power wire cores includes:

The flexible control wire core unit, the flexible ground wire core and the flexible light unit are respectively embedded in different gaps formed by any two adjacent power wire cores among the three power wire cores, and the The flexible control wire core unit, the flexible ground wire core and the flexible light unit are in contact with the two adjacent power wire cores;

The method of extruding a sheath on the surface of the flat structure formed by the three power wire cores and the flexible light unit to form an inner sheath layer includes:

The inner sheath layer is formed by extruding a sheath on the surface of the flat structure formed by the three power wire cores, the flexible light unit, the flexible ground wire core and the flexible control wire core unit.

In this embodiment, the manufacturing process of the photoelectric composite medium voltage shore power cable includes:

Provide flexible control unit;

A flexible rubber insulating layer is formed by extruding flexible rubber insulation on the surface of the wire core conductor of the flexible control unit;

The aluminum-plastic composite shielding tape is wrapped around the surface of the flexible rubber insulating layer to form an aluminum-plastic composite tape wrapping shielding layer.

The manufacturing process of the optoelectronic composite medium voltage shore power cable may be modified in other ways. For details, please refer to the description of the optoelectronic composite medium voltage shore power cable in FIG. 1 , which will not be repeated here.

In this case, the three power wire cores 11 are arranged in parallel and in a flat shape, and each adjacent two power wire cores 11 form a gap 110 , and the flexible light unit 12 is embedded in the gap 110 and is adjacent to the gap 110 . Two of the power wire cores 11 are in contact, and the flexible optical unit 12 and the three power wire cores 11 form a flat structure, which can provide a higher power transmission capacity under the condition of realizing the optical communication transmission function, Reduce the bending radius of the cable, improve the flexibility of the cable, and improve the current carrying capacity of the cable. In this case, the flexible power conductor core 111, the high electrical performance rubber insulating layer 114, the flame-retardant thermoplastic elastomer inner sheath layer, the wire braided flexible insulating shielding layer 117 and the flexible high-strength The fiber braided reinforcement layer further enhances the flexibility of the cable.

The flame retardant performance of the photoelectric composite medium-voltage shore power cable 1 in this case can meet the requirements of being closely arranged in bundles according to the actual laying situation, the non-metal content per meter is more than 7 liters, the flame temperature is 800 degrees Celsius, and the burning height of the cable after burning for 40 minutes does not exceed 7 liters. 2.5 meters; oil resistance can meet the requirements of IRM902 mineral oil after 24 hours oil resistance test at 100 degrees Celsius, the change rate of surface strength and elongation rate of cable sheath does not exceed 35%; low smoke performance can meet the minimum light transmittance of 60%; The halogen-free performance can satisfy the acid gas content ≤ 0.5% produced by combustion, the fluorine content ≤ 0.1%, the pH value ≥ 4.3, and the electrical conductivity ≤ 10 microSiemens/mm.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A photoelectric composite medium-voltage shore power cable, characterized in that:

   The photoelectric composite medium-voltage shore power cable includes a cable core, an inner sheath layer, a reinforcing layer and an outer sheath layer arranged in sequence from the inside to the outside, the inner sheath layer is wrapped around the outside of the cable core, and the reinforcing layer is a layer wraps around the inner jacket layer and the outer jacket layer wraps around the reinforcement layer;

   The cable core includes three power cores and a flexible optical unit, the three power cores are arranged in parallel contact and are flat, and a gap is formed between each adjacent two power cores and the inner sheath layer , the flexible light unit is embedded in the gap and is in contact with the two adjacent power wire cores.
2. The optoelectronic composite medium-voltage shore power cable according to claim 1, wherein the cable core further comprises a flexible ground wire core, and the flexible ground wire core and the flexible optical unit are respectively embedded in different gaps , and the flexible ground wire core is in contact with the two adjacent power wire cores.
3. The photoelectric composite medium-voltage shore power cable according to claim 2, wherein the number of the flexible grounding cores is two, and the two flexible grounding cores are respectively embedded in different adjacent two in different gaps formed between the power wire core and the inner sheath layer.
4. The photoelectric composite medium-voltage shore power cable according to claim 2, wherein each power core comprises a flexible power conductor core, a semiconductive tape conductor shielding layer, and a semiconductive extruded conductor, which are sequentially arranged from the inside to the outside. Shielding layer, high electrical performance rubber insulating layer, semiconducting extruded insulating shielding layer, semiconducting tape insulating shielding layer and multi-strand wire braided flexible insulating shielding layer.
5. The photoelectric composite medium-voltage shore power cable according to claim 4, wherein the flexible grounding wire core comprises a flexible grounding conductor core and a semi-conductive rubber insulating layer arranged in sequence from the inside to the outside, and the semi-conductive rubber insulating layer contact with the two adjacent power wire cores.
6. The photoelectric composite medium-voltage shore power cable according to claim 5, wherein the inner sheath layer is a flame-retardant thermoplastic elastomer inner sheath layer, and the reinforcing layer is a flexible high-strength fiber braided reinforcing layer, The outer sheath layer is an oil-resistant flame-retardant outer sheath layer.
7. The optoelectronic composite medium-voltage shore power cable according to claim 6, wherein the flexible optical unit comprises a high-temperature resistant single-mode/multi-mode optical fiber, a flexible high-strength fiber reinforced core and a flame-retardant thermoplastic sheath layer.
8. The optoelectronic composite medium-voltage shore power cable according to claim 7, wherein the cable core further comprises a flexible control wire core unit, the flexible control wire core unit, the flexible grounding wire core and the flexible optical fiber The units are respectively embedded in the different gaps, and the flexible control wire core unit is in contact with the two adjacent power wire cores.
9. The photoelectric composite medium voltage shore power cable according to claim 8, wherein the flexible control wire core unit comprises a flexible control conductor core, a flexible rubber insulating layer and an aluminum-plastic composite tape wrapping shielding layer.
10. A manufacturing process for a photoelectric composite medium voltage shore power cable, characterized in that the manufacturing process for the photoelectric composite medium voltage shore power cable comprises:

    Provide three power cores;

    The three power cores are arranged in parallel contact and have a flat structure;

    The flexible light unit is embedded in the gap formed by the two adjacent power wire cores, and is in contact with the two adjacent power wire cores;

    A flame-retardant thermoplastic elastomer is extruded on the surface of the flat structure formed by the three power wire cores and the flexible light unit to form an inner sheath layer;

    Weaving flexible high-strength fibers on the inner jacket layer to form a reinforcement layer;

    The outer sheath layer is formed by extruding the oil-resistant flame retardant material on the reinforcing layer.

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