CN214226596U

CN214226596U - Copper core crosslinked polyolefin insulation halogen-free flame-retardant wire

Info

Publication number: CN214226596U
Application number: CN202120091576.9U
Authority: CN
Inventors: 赵大军
Original assignee: Kunming Mingchao Electric Cable Co ltd
Current assignee: Kunming Mingchao Electric Cable Co ltd
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-09-17
Anticipated expiration: 2031-01-14

Abstract

The utility model discloses a copper core crosslinked polyolefin insulation halogen-free flame-retardant electric wire, which comprises a polyolefin insulation sleeve, wherein the inner wall of the polyolefin insulation sleeve is provided with a fire-resistant mica tape, a steel wire mesh is arranged inside the fire-resistant mica tape, tensile fibers are arranged inside the steel wire mesh, lead cores are arranged in the tensile fibers, three strands of lead cores are arranged in a shape like a Chinese character 'pin', a protective sleeve is arranged outside the lead cores, and a Y-shaped bracket is arranged at the central part of the tensile fibers; the beneficial effects of the utility model reside in that the bunched cable, length that can effective reduce cost, practice thrift the electric wire, the stability that the Y shape support improved the electric wire, and the elastic steel is favorable to buffering because inside deformation and the dislocation that temperature variation, expend with heat and contract with cold produced, and the strengthening rib has increased the intensity of electric wire, and the protective sheath has good fire-retardant and shielding effect, reduces the influence of external environment to the cable.

Description

Copper core crosslinked polyolefin insulation halogen-free flame-retardant wire

Technical Field

The utility model relates to a cable field especially relates to a copper core crosslinked polyolefin insulation does not have steamed flame retardant wire.

Background

The power cable is used for transmitting and distributing electric energy, is commonly used for urban underground power grids, power station leading-out lines, power supply inside industrial and mining enterprises and power transmission lines under river-crossing seawater, and has a gradually increasing proportion in the power line. The power cable is a cable product used for transmitting and distributing high-power electric energy in a main line of a power system, and comprises various insulated power cables with voltage grades of 1-500KV and above, and the copper-core cross-linked polyolefin insulated halogen-free flame-retardant wire is one of the cables.

The cable on the market at present has the condition that copper line compression warp in the in-process of using to can not satisfy people's use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a copper core crosslinked polyolefin insulation does not have steamed fire-retardant electric wire to prior art not enough.

In order to achieve the above purpose, the present invention is achieved by the following technical solutions.

A copper core crosslinked polyolefin insulation halogen-free flame retardant wire is characterized in that: it includes the insulating cover of polyolefin, the inner wall of the insulating cover of polyolefin is provided with fire-resistant mica tape, the inside of fire-resistant mica tape sets up the wire net, the inside of wire net is provided with tensile fibre, be provided with the wire core in the tensile fibre, the triplex the wire core is "article" font and arranges, the outside of wire core is provided with the protective sheath, the fibrous central point of tensile is provided with Y shape support.

Furthermore, a plurality of heat dissipation holes are formed in the outer wall of the polyolefin insulating sleeve along the axial direction, a plurality of through holes are formed in the polyolefin insulating sleeve along the radial direction, and reinforcing ribs are arranged in the through holes of the polyolefin insulating sleeve.

Furthermore, each strand of the wire core is composed of 5-8 copper cores which are arranged in a close packing manner.

Furthermore, the protective sleeve is sequentially provided with a halogen-free flame-retardant layer, a shielding layer and a water-blocking wrapping belt from outside to inside.

Furthermore, the shielding layer is formed by twisting 4 tinned copper wires with the thickness of 0.08mm into one bundle, and then the 6-8 bundles are interwoven into one bundle and then the bundle is wound on the outer side of the water-blocking wrapping belt.

Furthermore, the Y-shaped support is formed by connecting three baffles, the Y-shaped support is formed into a Y shape on the cross section, the end part of the Y-shaped support is connected with elastic steel, and the other end of the elastic steel is connected with a steel wire mesh.

Furthermore, a flame-retardant through hole is formed in the Y-shaped support, and fire extinguishing powder is filled in the flame-retardant through hole.

Furthermore, the number of the reinforcing ribs is 6-18.

The beneficial effects of the utility model reside in that the bunched cable, length that can effective reduce cost, practice thrift the electric wire, the stability that the Y shape support improved the electric wire, and the elastic steel is favorable to buffering because inside deformation and the dislocation that temperature variation, expend with heat and contract with cold produced, and the strengthening rib has increased the intensity of electric wire, and the protective sheath has good fire-retardant and shielding effect, reduces the influence of external environment to the cable.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure: 1. a polyolefin insulating sleeve; 101. heat dissipation holes; 102. reinforcing ribs; 2. fire-resistant mica tapes; 3. a tensile fiber; 4. a protective sleeve; 401. a halogen-free flame retardant layer; 402. a shielding layer; 403. a water-blocking wrapping belt; 5. a wire core; 501. a copper core; 6. a Y-shaped bracket; 601. a flame-retardant through hole; 602. elastic steel; 7. and (5) steel wire meshes.

Detailed Description

The present invention is further illustrated by the following examples, but is not limited to the contents of the specification.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in the figure: the utility model provides a fire-retardant electric wire of insulating halogen-free of copper core crosslinked polyolefin, includes polyolefin insulation cover 1, the outer wall of polyolefin insulation cover 1 is provided with a plurality of louvre 101 along the axial, polyolefin insulation cover 1 radially is provided with a plurality of through-holes, be provided with strengthening rib 102 in the through-hole of polyolefin insulation cover 1, the inner wall of polyolefin insulation cover 1 is provided with fire-resistant mica tape 2, the inside of fire-resistant mica tape 2 sets up wire net 7, the inside of wire net 7 is provided with tensile fibre 3, be provided with wire core 5 in the tensile fibre 3, three strands wire core 5 is the font and arranges, every strand wire core 5 comprises 5-8 copper cores 501 densest piling up range, can improve the transmission efficiency of electric wire, the outside of wire core 5 is provided with protective sheath 4, protective sheath 4 sets gradually no steamed flame retardant layer 401 from the outside in, A shielding layer 402 and a water-blocking wrapping tape 403.

The shielding layer 402 is formed by twisting 4 tinned copper wires with the thickness of 0.08mm into one bundle, and then the bundle is interwoven into a bundle by 6-8 bundles and surrounds the outer side of the water-blocking wrapping tape 403, the density of the bundle is not less than ninety percent, and the shielding layer has a good shielding effect.

The central point of tensile fibre 3 is provided with Y shape support 6, Y shape support 6 is three baffles and connects to form, Y shape support 6 is used for separating and supports three strands of wire cores 5, Y shape support 6 forms "Y" font on the cross section, the end connection of Y shape support 6 has elastic steel 602, elastic steel 602's the other end and wire net 7 meet mutually, Y shape support 6's inside is provided with fire-retardant through-hole 601, fire-retardant through-hole 601 intussuseption is filled with the powder of putting out a fire.

It is to be understood that the above-described embodiments of the present invention are merely examples provided for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.

Claims

1. A copper core crosslinked polyolefin insulation halogen-free flame retardant wire is characterized in that: it includes polyolefin insulation cover (1), the inner wall of polyolefin insulation cover (1) is provided with fire resistant mica tape (2), the inside of fire resistant mica tape (2) sets up wire net (7), the inside of wire net (7) is provided with tensile fiber (3), be provided with wire core (5) in tensile fiber (3), the triplex wire core (5) are "article" font and arrange, the outside of wire core (5) is provided with protective sheath (4), the central point of tensile fiber (3) is provided with Y shape support (6).

2. The copper core crosslinked polyolefin insulated halogen-free flame retardant wire according to claim 1, characterized in that: the heat dissipation structure is characterized in that a plurality of heat dissipation holes (101) are formed in the outer wall of the polyolefin insulation sleeve (1) in the axial direction, a plurality of through holes are formed in the polyolefin insulation sleeve (1) in the radial direction, and reinforcing ribs (102) are arranged in the through holes of the polyolefin insulation sleeve (1).

3. The copper core crosslinked polyolefin insulated halogen-free flame retardant wire according to claim 1, characterized in that: each strand of the wire core (5) is formed by 5-8 copper cores (501) which are arranged in a close packing manner.

4. The copper core crosslinked polyolefin insulated halogen-free flame retardant wire according to claim 1, characterized in that: the protective sleeve (4) is sequentially provided with a halogen-free flame-retardant layer (401), a shielding layer (402) and a water-blocking wrapping belt (403) from outside to inside.

5. The copper core crosslinked polyolefin insulated halogen-free flame retardant wire according to claim 4, wherein: the shielding layer (402) is formed by twisting 4 tinned copper wires with the thickness of 0.08mm into one bundle, and then the 6-8 bundles are interwoven into one bundle and then the bundle is wound on the outer side of the water-blocking wrapping belt (403).

6. The copper core crosslinked polyolefin insulated halogen-free flame retardant wire according to claim 1, characterized in that: the Y-shaped support (6) is formed by connecting three baffles, the Y-shaped support (6) forms a Y shape on the cross section, the end part of the Y-shaped support (6) is connected with elastic steel (602), and the other end of the elastic steel (602) is connected with a steel wire mesh (7).

7. The copper core crosslinked polyolefin insulated halogen-free flame retardant wire according to claim 1, characterized in that: and a flame-retardant through hole (601) is formed in the Y-shaped support (6), and fire extinguishing powder is filled in the flame-retardant through hole (601).

8. The copper core crosslinked polyolefin insulated halogen-free flame retardant wire according to claim 2, characterized in that: the number of the reinforcing ribs (102) is 6-18.