CN214279667U

CN214279667U - High-strength power cable for photovoltaic system

Info

Publication number: CN214279667U
Application number: CN202120705331.0U
Authority: CN
Inventors: 叶千钧; 刘江山; 余梦琪
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-09-24
Anticipated expiration: 2031-04-08

Abstract

The application belongs to the technical field of photovoltaic and electric power, and discloses a high-strength power cable for a photovoltaic system, which comprises a reinforcing piece, a power transmission line and a sheath layer, wherein the power transmission line consists of a conductor and an insulating layer, the outer edge of the insulating layer is one part of the surface of a cylinder, and the upper edge and the lower edge of the insulating layer are planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body and reinforcing convex strips which are positioned on each corner of the reinforcing piece body and extend outwards, and the outer surface of the reinforcing piece body is a plane; the power transmission line distributes outside the reinforcement, has between the adjacent power transmission line and keeps apart the chamber, and the inner edge of insulating layer pastes with the surface of reinforcement body mutually, and the outer fringe tip of adjacent insulating layer pastes, and the outer fringe of insulating layer forms a complete face of cylinder, strengthens the sand grip and is located and keeps apart the intracavity, and the restrictive coating is lived all power transmission line cladding. The application has the following main beneficial effects: simple structure, easy manufacture, strong tensile resistance and excellent isolation and support effects.

Description

High-strength power cable for photovoltaic system

Technical Field

The utility model belongs to the technical field of photovoltaic and electric power, especially, relate to a high strength power cable for photovoltaic system.

Background

In the prior art, a multi-core cable consists of a conductor, an insulated wire and a protective layer, wherein the insulated wire consists of an insulating layer for coating the conductor, and the protective layer is used for coating all the insulated wires.

On the other hand, in the layer stranded optical cable, a plurality of sleeves are stranded around the reinforcing member, although the reinforcing member can play a role in reinforcement, the loose sleeves are in line contact with the reinforcing member due to the fact that the reinforcing member is circular, and although adjacent sleeves are limited, the stranded sleeves are easily crushed mutually, and therefore unreliable optical communication is caused; and the loose tube is usually bound by the binding yarn to be fixed in position, the loose tube is easily pricked by the binding yarn, and the loose tube is often pricked due to different expansion coefficients when the temperature changes, so that the optical fiber is stressed, the communication capability of a light person is broken, and the optical fiber is broken by a heavy person to cause the interruption of communication.

Further, prior art CN211265086U discloses a sector-structured cable having a reinforcing unit, a power transmission body, and an outer sheath, the power transmission body being composed of an insulator and an electric unit; the heat dissipation device is characterized in that the insulator is defined by an arc column body, a first protective body and a second protective body, the first protective body and the second protective body are both in cuboid shapes, the arc column body is in an arc ring column body shape, one end of the first protective body is connected with one end of the second protective body, the first protective body is connected with the arc column body, the second protective body is connected with the arc column body, the arc column body is provided with a heat dissipation groove, the heat dissipation groove is continuously distributed on the arc column body along the direction parallel to the axis, the vertex angle of the insulator is in a concave arc column shape, and the arc column body is provided with a through inner heat dissipation hole; the electric unit is composed of conductors with sector sections; the power transmission body is attached to the reinforcing unit.

Furthermore, prior art CN201549243U discloses a sector cable; it at least comprises: two insulating layers coated outside the conductor and a sheath layer extruded outside the insulating layers; the method is characterized in that: the conductor is formed by twisting a plurality of metal wires, the cross section of the conductor is in a fan shape, and the cross section of the insulating layer is in a fan shape similar to the cross section of the conductor; a gap is formed between every two adjacent insulating layers, and any cross section formed by all the insulating layers in an arrayed mode is approximate to a circle or an ellipse; the insulating layers are arranged in the sheath layer in parallel.

In addition, in the prior art, the cable used in the photovoltaic system has single performance, can only transmit electric power, cannot transmit signals simultaneously, needs to be laid for many times in the occasions where optical signals are transmitted, needs time for laying for many times, needs a plurality of cables, occupies a large space, is high in cost and is very inconvenient.

The conductors in the prior art are all in fan-shaped cross sections, the insulating layers are also in fan shapes, and no reinforcing piece exists, so that the tensile force often cannot meet the construction requirement; on the other hand, the insulating layer is not stable in placement.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the present invention discloses a high strength power cable for photovoltaic system, which is implemented by the following technical solution.

A high-strength power cable for a photovoltaic system comprises a reinforcing piece, a plurality of power transmission lines and a sheath layer, wherein the sheath layer is positioned outside the power transmission lines, each power transmission line is composed of a conductor and an insulating layer covering the conductor, the outer edge of each insulating layer is a part of the surface of a cylinder, and the upper edge and the lower edge of each insulating layer are planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body and reinforcing convex strips which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the power transmission line distributes outside the reinforcement, has between the adjacent power transmission line and keeps apart the chamber, and the inner edge of insulating layer pastes with the surface of reinforcement body mutually, and the outer fringe tip of adjacent insulating layer pastes, and the outer fringe of the insulating layer of all power transmission lines forms a complete face of cylinder, strengthens the sand grip and is located and keeps apart the intracavity, and the restrictive coating is lived all power transmission line cladding.

A high-strength power cable for a photovoltaic system comprises a reinforcing member, a plurality of light transmission components and a sheath layer, wherein the sheath layer is positioned outside the light transmission components, each light transmission component consists of an insulating layer and a plurality of light transmission bodies positioned in a cavity inside the insulating layer, each light transmission body consists of a loose tube and a plurality of light guide fibers positioned in the inner space of the loose tube, the outer edge of the insulating layer is part of the surface of a cylinder, and the upper edge and the lower edge of the insulating layer are planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body and reinforcing convex strips which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the light transmission components are distributed outside the reinforcing piece, an isolation cavity is arranged between every two adjacent light transmission components, the inner edge of each insulating layer is attached to the outer surface of the reinforcing piece body, the end parts of the outer edges of the adjacent insulating layers are attached to each other, the outer edges of the insulating layers of all the light transmission components form a complete cylindrical surface, the reinforcing convex strips are located in the isolation cavity, and all the light transmission components are coated by the sheath layer.

A high-strength power cable for a photovoltaic system comprises a reinforcing piece, a plurality of light transmission components, a plurality of power transmission components and a sheath layer, wherein the sheath layer is positioned outside the light transmission components and the power transmission components; the power transmission component consists of an insulating layer and a plurality of insulated wires positioned in a cavity inside the insulating layer, wherein each insulated wire consists of a conductor and an insulating sleeve covering the conductor; the outer edge of the insulating layer is a part of the surface of the cylinder, and the upper edge and the lower edge of the insulating layer are both planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body and reinforcing convex strips which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the light transmission components are distributed outside the reinforcing piece, the power transmission components are distributed outside the reinforcing piece, the inner edges of the insulating layers are attached to the outer surface of the reinforcing piece body, the light transmission components and the power transmission components are distributed outside the reinforcing piece at intervals, an isolation cavity is formed between each two adjacent light transmission components, the end portions of the outer edges of the adjacent insulating layers are attached to each other, the outer edges of the insulating layers of all the light transmission components and the power transmission components form a complete cylindrical surface, the reinforcing convex strips are located in the isolation cavity, and all the light transmission components and the power transmission components are covered by the sheath layer.

A high-strength power cable for a photovoltaic system comprises a reinforcing piece, a plurality of light transmission components, a plurality of power transmission lines and a sheath layer, wherein the sheath layer is positioned outside the light transmission components and the power transmission lines; the power transmission line is composed of a conductor and an insulating layer covering the conductor, the outer edge of the insulating layer is a part of the surface of the cylinder, and the upper edge and the lower edge of the insulating layer are both planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body and reinforcing convex strips which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the light transmission parts are distributed outside the reinforcing part, the power transmission lines are distributed outside the reinforcing part, the inner edge of the insulating layer is attached to the outer surface of the reinforcing part body, the light transmission parts and the power transmission lines are distributed at intervals outside the reinforcing part, an isolation cavity is formed between each adjacent light transmission part and the power transmission lines, the outer edge end parts of the adjacent insulating layers are attached to each other, the outer edges of the insulating layers of all the light transmission parts and the power transmission lines form a complete cylindrical surface, the reinforcing convex strips are located in the isolation cavity, and all the light transmission parts and the power transmission lines are coated by the sheath layer.

The utility model discloses following main beneficial effect has: simple structure, easy manufacture, strong tensile resistance and excellent isolation and support effects.

Drawings

Fig. 1 is a schematic perspective view of a dissected segment of the example 1.

Fig. 2 is an enlarged cross-sectional structure diagram of fig. 1.

Fig. 3 is a schematic perspective view of a dissected segment of the example 2.

Fig. 4 is an enlarged cross-sectional view of fig. 3.

Fig. 5 is a schematic perspective view of a dissected segment of the example 3.

Fig. 6 is an enlarged cross-sectional view of fig. 5.

Fig. 7 is a schematic perspective view of a dissected segment of the example 4.

Fig. 8 is an enlarged cross-sectional view of fig. 7.

In order that those skilled in the art will more accurately and clearly understand and practice the present application, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which: 1-reinforcing element, 2-power transmission line, 3-sheath layer, 4-light transmission body, 5-insulated wire, 11-reinforcing element body, 12-reinforcing convex strip, 21-conductor, 22-insulating layer, 212-isolation cavity, 41-optical fiber, 42-loose tube, 51-electric conductor and 52-insulating sleeve.

Detailed Description

Examples 1

Referring to fig. 1 and 2, a high-strength power cable for a photovoltaic system includes a reinforcement 1, four power lines 2, and a sheath layer 3, wherein the sheath layer is located outside the power lines, the power lines are composed of conductors 21 and insulating layers 22 covering the conductors, the outer edges of the insulating layers are a part of the surface of a cylinder, and the upper edges and the lower edges of the insulating layers are planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body 11 and reinforcing convex strips 12 which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the power transmission line distributes outside the reinforcement, has between the adjacent power transmission line and keeps apart chamber 212, and the inner edge of insulating layer pastes with the surface of reinforcement body mutually, and the outer fringe end of adjacent insulating layer pastes, and the outer fringe of the insulating layer of all power transmission lines forms a complete face of cylinder, strengthens the sand grip and is located and keeps apart the intracavity, and the restrictive coating is lived all power transmission line cladding.

In this embodiment, the power lines are not limited to four power lines, but may be other power lines.

EXAMPLES example 2

Referring to fig. 3 and 4, a high-strength power cable for a photovoltaic system includes a reinforcement 1, four light transmission members, and a sheath layer 3, wherein the sheath layer is located outside the light transmission members, the light transmission members are composed of an insulating layer 22 and two light transmission members 4 located in a cavity inside the insulating layer, the light transmission members are composed of a loose tube 42 and a plurality of optical fibers 41 located in the inner space of the loose tube, the outer edge of the insulating layer is a part of the surface of a cylinder, and the upper edge and the lower edge of the insulating layer are both planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body 11 and reinforcing convex strips 12 which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the light transmission components are distributed outside the reinforcing piece, an isolation cavity 212 is arranged between every two adjacent light transmission components, the inner edge of each insulating layer is attached to the outer surface of the reinforcing piece body, the end parts of the outer edges of the adjacent insulating layers are attached to each other, the outer edges of the insulating layers of all the light transmission components form a complete cylindrical surface, the reinforcing convex strips are located in the isolation cavity, and all the light transmission components are coated by the sheath layer.

In this embodiment, the number of light transmission members is not limited to four, and a plurality of other light transmission members may be used.

EXAMPLE 3

Referring to fig. 5 and 6, a high-strength power cable for a photovoltaic system includes a reinforcement 1, two light transmission components, two power transmission components, and a sheath layer 3, wherein the sheath layer is disposed outside the light transmission components and the power transmission components, the light transmission components include an insulating layer 22 and two light transmission bodies 4 disposed in a cavity inside the insulating layer, and the light transmission bodies include a loose tube 42 and a plurality of optical fibers 41 disposed in an inner space of the loose tube; the power transmission component consists of an insulating layer 22 and two insulated wires 5 positioned in the cavity inside the insulating layer, wherein each insulated wire consists of a conductor 51 and an insulating sleeve 52 covering the conductor; the outer edge of the insulating layer is a part of the surface of the cylinder, and the upper edge and the lower edge of the insulating layer are both planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body 11 and reinforcing convex strips 12 which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the light transmission components are distributed outside the reinforcing piece, the power transmission components are distributed outside the reinforcing piece, the inner edge of each insulating layer is attached to the outer surface of the reinforcing piece body, the light transmission components and the power transmission components are distributed outside the reinforcing piece at intervals, an isolation cavity 212 is formed between each adjacent light transmission component and each power transmission component, the end portions of the outer edges of the adjacent insulating layers are attached to each other, the outer edges of the insulating layers of all the light transmission components and the power transmission components form a complete cylindrical surface, the reinforcing convex strips are located in the isolation cavities, and all the light transmission components and the power transmission components are covered by the sheath layer.

In this embodiment, the optical transmission device is not limited to two light transmission components and two power transmission components, but may also be other multiple light transmission components and multiple power transmission components; when the number of the light transmission members and the number of the power transmission members are different, the light transmission members and the power transmission members may be distributed at intervals, but the light transmission members may be distributed continuously and the power transmission members may be distributed continuously, or the light transmission members may be distributed randomly instead of the above distribution.

EXAMPLE 4

Referring to fig. 7 and 8, a high-strength power cable for photovoltaic system comprises a reinforcement 1, two light transmission components, two power transmission lines, and a sheath layer 3, wherein the sheath layer is located outside the light transmission components and the power transmission lines, the light transmission components are composed of an insulating layer 22 and two light transmission bodies 4 located in the inner cavity of the insulating layer, and the light transmission bodies are composed of a loose tube 42 and a plurality of optical fibers 41 located in the inner space of the loose tube; the power transmission line is composed of a conductor 21 and an insulating layer 22 covering the conductor, the outer edge of the insulating layer is a part of the surface of the cylinder, and the upper edge and the lower edge of the insulating layer are both planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body 11 and reinforcing convex strips 12 which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the light transmission parts are distributed outside the reinforcing part, the power transmission lines are distributed outside the reinforcing part, the inner edges of the insulating layers are attached to the outer surface of the reinforcing part body, the light transmission parts and the power transmission lines are distributed at intervals outside the reinforcing part, an isolation cavity 212 is formed between each adjacent light transmission part and each power transmission line, the outer edge end parts of the adjacent insulating layers are attached to each other, the outer edges of the insulating layers of all the light transmission parts and the power transmission lines form a complete cylindrical surface, the reinforcing convex strips are located in the isolation cavities, and all the light transmission parts and the power transmission lines are coated by the sheath layer.

In this embodiment, the optical transmission device is not limited to two light transmission components and two power transmission lines, but may also include other multiple light transmission components and multiple power transmission lines; when the number of the light transmission components and the number of the power transmission lines are not equal, the light transmission components and the power transmission lines are not limited to be distributed at intervals, and the light transmission components can be distributed in a connected manner, the power transmission lines can be distributed in a connected manner, and the light transmission components and the power transmission lines can be distributed randomly if the light transmission components and the power transmission lines are not distributed in the connected manner.

The material of the reinforcement described in this application is glass fibre reinforced plastic or steel or aluminium or iron.

The material of the sheath layer described in this application is plastic.

The material of the conductor described in this application is aluminum or copper or an alloy.

The material of the insulating layer described in this application is plastic.

The type of the optical fiber described in the present application is G.652 or G.653 or G.654 or G.655 or G.656 or G.657 or A1a or A1b or A1c or A1d or A1e or OM1 or OM2 or OM3 or OM 4.

The material of the loose tube described in this application is plastic.

The material of the electrical conductor described in this application is aluminum or copper or an alloy.

In the application, the insulating sleeve is made of plastic.

In this application, the light transmitting bodies in the insulating layer are not limited to two, but may be a plurality of light transmitting bodies, and when there are two light transmitting bodies, the two light transmitting bodies are tangent to the inner wall of the insulating layer, and the light transmitting bodies cannot move in the insulating layer.

In the present application, the number of insulated wires in the insulating layer is not limited to two, and may be other numbers, and the insulated wires cannot move in the insulating layer.

In the application, the adhesive can be sprayed between the inner edge of the insulating layer and the surface of the reinforcing piece body, so that the inner edge of the insulating layer and the surface of the reinforcing piece body are effectively combined, and the fixing is more reliable.

In the application, due to the existence of the reinforcing piece, the tensile resistance is greatly improved, and the method is suitable for occasions of high-tension construction, such as dragging and laying by a machine; in addition, the reinforcing convex strips are arranged on the reinforcing piece, so that the reinforcing convex strips play a role in reinforcing tensile force on one hand, and the insulating layer is isolated and supported in a limited way on the other hand, so that the insulating layer is positioned more accurately and reliably; in the application, the sleeve does not need to be twisted, so that the phenomena of optical fiber breakage and optical fiber stress are effectively prevented, and the communication is more stable and reliable.

The above-mentioned embodiments are merely preferred technical solutions of the present invention, and should not be construed as limitations of the present invention. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. A high-strength power cable for a photovoltaic system comprises a reinforcing piece (1), a plurality of power transmission lines (2) and a sheath layer (3), wherein the sheath layer is positioned outside the power transmission lines, each power transmission line is composed of a conductor (21) and an insulating layer (22) covering the conductor, the outer edge of each insulating layer is a part of the surface of a cylinder, and the upper edge and the lower edge of each insulating layer are planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body (11) and reinforcing convex strips (12) which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the power transmission line distributes outside the reinforcement, has between the adjacent power transmission line and keeps apart chamber (212), and the inner edge of insulating layer pastes with the surface of reinforcement body mutually, and the outer fringe tip of adjacent insulating layer pastes, and the outer fringe of the insulating layer of all power transmission lines forms a complete face of cylinder, strengthens the sand grip and is located and keeps apart the intracavity, and the restrictive coating is lived all power transmission line cladding.

2. A high strength power cable for photovoltaic systems according to claim 1, wherein said reinforcement is made of glass fiber reinforced plastic or steel or aluminum or iron.

3. A high strength power cable for photovoltaic systems as claimed in claim 1 wherein said sheath layer is made of plastic.

4. A high strength power cable for photovoltaic systems according to claim 1, characterized in that the material of said conductor is aluminum or copper or an alloy.

5. A high strength power cable for photovoltaic systems according to claim 1, wherein said insulating layer is made of plastic.

6. A high-strength power cable for a photovoltaic system comprises a reinforcing element (1), a plurality of light transmission components and a sheath layer (3), wherein the sheath layer is positioned outside the light transmission components, the light transmission components comprise an insulating layer (22) and a plurality of light transmission bodies (4) positioned in a cavity inside the insulating layer, the light transmission bodies comprise a loose tube (42) and a plurality of optical fibers (41) positioned in the inner space of the loose tube, the outer edge of the insulating layer is part of the surface of a cylinder, and the upper edge and the lower edge of the insulating layer are planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body (11) and reinforcing convex strips (12) which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the light transmission components are distributed outside the reinforcing piece, an isolation cavity (212) is arranged between every two adjacent light transmission components, the inner edge of each insulating layer is attached to the outer surface of the reinforcing piece body, the end parts of the outer edges of the adjacent insulating layers are attached to each other, the outer edges of the insulating layers of all the light transmission components form a complete cylindrical surface, the reinforcing convex strips are located in the isolation cavity, and all the light transmission components are coated by the sheath layer.

7. A high strength power cable for photovoltaic system as claimed in claim 6, wherein said optical fiber is of type G.652 or G.653 or G.654 or G.655 or G.656 or G.657 or A1a or A1b or A1c or A1d or A1e or OM1 or OM2 or OM3 or OM 4.

8. A high strength power cable for photovoltaic systems according to claim 6, characterized in that the material of said loose tube is plastic.

9. A high-strength power cable for a photovoltaic system comprises a reinforcing piece (1), a plurality of light transmission components, a plurality of power transmission components and a sheath layer (3), wherein the sheath layer is positioned outside the light transmission components and the power transmission components, the light transmission components comprise an insulating layer (22) and a plurality of light transmission bodies (4) positioned in a cavity inside the insulating layer, and the light transmission bodies comprise a loose sleeve (42) and a plurality of optical fibers (41) positioned in the inner space of the loose sleeve; the power transmission component consists of an insulating layer (22) and a plurality of insulated wires (5) positioned in a cavity inside the insulating layer, wherein each insulated wire consists of a conductor (51) and an insulating sleeve (52) covering the conductor; the outer edge of the insulating layer is a part of the surface of the cylinder, and the upper edge and the lower edge of the insulating layer are both planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body (11) and reinforcing convex strips (12) which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the light transmission components are distributed outside the reinforcing piece, the power transmission components are distributed outside the reinforcing piece, the inner edge of each insulating layer is attached to the outer surface of the reinforcing piece body, the light transmission components and the power transmission components are distributed outside the reinforcing piece at intervals, an isolation cavity (212) is formed between each adjacent light transmission component and each power transmission component, the end parts of the outer edges of the adjacent insulating layers are attached to each other, the outer edges of the insulating layers of all the light transmission components and the power transmission components form a complete cylindrical surface, the reinforcing convex strips are located in the isolation cavities, and all the light transmission components and the power transmission components are wrapped by the sheath layer.

10. A high-strength power cable for a photovoltaic system comprises a reinforcing piece (1), a plurality of light transmission parts, a plurality of power transmission lines and a sheath layer (3), wherein the sheath layer is positioned outside the light transmission parts and the power transmission lines, the light transmission parts comprise an insulating layer (22) and a plurality of light transmission bodies (4) positioned in a cavity inside the insulating layer, and the light transmission bodies comprise loose tubes (42) and a plurality of optical fibers (41) positioned in the inner space of the loose tubes; the power transmission line is composed of a conductor (21) and an insulating layer (22) covering the conductor, the outer edge of the insulating layer is a part of the surface of the cylinder, and the upper edge and the lower edge of the insulating layer are both planes; it is characterized in that the inner edge of the insulating layer is a plane; the reinforcing piece is composed of a reinforcing piece body (11) and reinforcing convex strips (12) which are positioned on each corner of the reinforcing piece body and extend outwards, the outer surface of the reinforcing piece body is a plane, and the reinforcing piece is of an integrated structure; the light transmission parts are distributed outside the reinforcing part, the power transmission lines are distributed outside the reinforcing part, the inner edges of the insulating layers are attached to the outer surface of the reinforcing part body, the light transmission parts and the power transmission lines are distributed at intervals outside the reinforcing part, an isolation cavity (212) is arranged between each adjacent light transmission part and the corresponding power transmission line, the outer edge end parts of the adjacent insulating layers are attached to each other, the outer edges of the insulating layers of all the light transmission parts and the corresponding power transmission lines form a complete cylindrical surface, the reinforcing convex strips are located in the isolation cavity, and all the light transmission parts and the corresponding power transmission lines are coated by the sheath layer.