CN212516608U - Flame-retardant fireproof electric wire - Google Patents

Abstract

The utility model provides a flame-retardant fireproof electric wire, which is characterized in that the flame-retardant fireproof electric wire comprises a conductor, a fireproof layer and an insulating layer; the fireproof layer is coated on the outer side of the conductor, and the insulating layer is tightly extruded on the outer side of the fireproof layer; the insulating layer comprises an insulating layer of a ceramicized polyolefin material; and one side of the fireproof layer facing the conductor is provided with two layers of overlapped synthetic mica tapes. The utility model discloses simple structure has adopted ceramic polyolefin material's insulating layer, has solved the technical problem that produces the burning drippage when the electric wire burning. The utility model adopts the technical means that the insulating layer of the ceramic polyolefin material is tightly extruded outside the fireproof layer, and solves the technical problems that the synthetic mica tape of the fireproof layer is easy to drop and absorb moisture after the electric wire is burnt. The utility model discloses a restriction synthetic mica tape has solved the easy cracked technical problem of synthetic mica tape when the electric wire is crooked around the technological means of package width.

Description

Flame-retardant fireproof electric wire

Technical Field

The utility model relates to an electric power tech field specifically, relates to a fire-retardant fire prevention electric wire, especially a fire-retardant fire prevention electric wire of B1 level.

Background

With the development of the power industry, the data communication industry, the urban rail transit industry and the like, the requirements of various industries on electric wires are higher and higher, and in use, the electric wires are prevented from mechanical damage, insulation aging, deterioration and the like, and are required to be fireproof.

The conventional various types of electric wires are frequently subjected to factors such as current overload, high temperature and high heat during daily operation to influence normal use, and the fireproof performance of the electric wires needs to be further improved.

Patent document CN208460434U discloses an electric wire, which includes a conductive core bundle composed of several conductive cores, a shielding layer wrapped on the outer layer of the conductive core bundle, and an outer plastic layer wrapped on the outer layer of the shielding layer; the outer plastic layer is provided with colored injection strips, and the outer plastic layer is integrally covered with embossing. The shielding layer can effectively avoid mutual interference among the conductive core bundles, and plays a role in shielding interference signals; the outer plastic layer can prevent water and wear and protect the internal wire core; the colored injection strip can enable the conductive core bundle to be easily distinguished from other electric wires, and the embossing also enhances the overall wear resistance and the tensile resistance of the conductive core bundle. However, the wire is not provided with a fireproof layer and an insulating layer and does not have good fireproof performance.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a fire-retardant fire prevention electric wire.

The flame-retardant fireproof electric wire comprises a conductor, a fireproof layer and an insulating layer;

the fireproof layer is coated on the outer side of the conductor, and the insulating layer is tightly extruded on the outer side of the fireproof layer;

the insulating layer comprises an insulating layer of a ceramicized polyolefin material;

and one side of the fireproof layer facing the conductor is provided with two layers of overlapped synthetic mica tapes.

Preferably, the overlapping rate of the two layers of overlapped and lapped synthetic mica tapes is 15% -35%.

Preferably, the width of the synthetic mica tape is 2.7 to 3.4 times the diameter of the conductor.

Preferably, the conductor comprises a conductor of solid copper, metallised copper or stranded copper material.

Preferably, the synthetic mica tape comprises a ceramized phlogopite tape.

The utility model provides a flame-retardant fireproof electric wire, which is characterized in that the wire comprises a conductor, a fireproof layer and an insulating layer;

the fireproof layer is coated on the outer side of the conductor, and the insulating layer is tightly extruded on the outer side of the fireproof layer;

the insulating layer comprises an insulating layer of a ceramicized polyolefin material;

one side of the fireproof layer facing the conductor is provided with two layers of overlapped and wrapped synthetic mica tapes;

the overlapping rate of the two layers of overlapped and lapped synthetic mica tapes is 15-35%;

the width of the synthetic mica tape is 2.7-3.4 times of the diameter of the conductor;

the conductor comprises a conductor made of solid copper, metal-plated copper or stranded copper material;

the synthetic mica tape comprises a ceramic gold mica tape.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses simple structure has adopted ceramic polyolefin material's insulating layer, produces the technical problem of burning drippage when having solved the electric wire burning, makes the electric wire satisfy the d0 grade requirement of B1 level fire-retardant requirement.

2. The utility model discloses a make the insulating layer of pottery polyolefin material closely crowded package in the technical means in the flame retardant coating outside for the insulating layer dielectric hardening forms compactness good when the burning, and exposes the shelly structure of not moisture absorption in the air for a long time, has solved the synthetic mica tape of flame retardant coating after the electric wire burning and has easily come off, the technical problem of easy moisture absorption.

3. The utility model discloses a restriction synthetic mica tape has solved the easy cracked technical problem of synthetic mica tape when the electric wire is crooked around the technological means of package width.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic cross-sectional structure diagram of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of a conductor according to an embodiment of the present invention.

The figures show that:

conductor 1 conductor core 4

Filling material 5 for fire-proof layer 2

Insulating layer 3 outer sheath 6

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The utility model provides a flame-retardant fireproof electric wire, which is characterized in that the flame-retardant fireproof electric wire comprises a conductor 1, a fireproof layer 2 and an insulating layer 3; the fireproof layer 2 is coated outside the conductor 1;

the insulating layer 3 comprises an insulating layer 3 made of ceramic polyolefin material, and the insulating layer 3 is tightly extruded on the outer side of the fireproof layer 2; the insulating layer 3 is tightly extruded and wrapped on the fireproof layer 2 by ceramic polyolefin materials with excellent flame retardant effect, the insulating layer 3 is insulated and hardened to form a shell structure when the electric wire is burnt, and burning drips are avoided, so that the electric wire can meet the zero-dripping requirement which is difficult to reach by B1-grade electric wires, and meanwhile, the condition that the insulating property is reduced after the synthetic mica layer of the fireproof layer 2 falls off or the electric wire is burnt due to moisture absorption is prevented.

And one side of the fireproof layer 2 facing the conductor 1 is provided with two layers of overlapped synthetic mica tapes. The overlapping rate of the two layers of overlapped and lapped synthetic mica tapes is 15-35%.

The processing difficulty of the synthetic mica tape and the stability of the performance of the wire are comprehensively considered, and the width of the synthetic mica tape is 2.7-3.4 times of the diameter of the conductor 1. By adopting the synthetic mica tape wrapping with the width, the phenomenon that the synthetic mica tape cracks under external force when the wire is bent can be effectively avoided, and the performance stability of the wire is improved.

The conductor 1 comprises a conductor 1 made of solid copper, metal-plated copper or stranded copper material; preferably The conductor 1 adopts: the 1 st solid copper or metal-plated copper conductor which meets the requirements of GB/T3956-;

or the 2 nd stranded copper and metal-plated copper conductor meeting the requirements of GB/T3956-;

or copper or metallized copper conductors corresponding to wire product standards.

In one of the utility modelPREFERRED EMBODIMENTSThe conductor 1 comprises an outer sheath 6, a plurality of conductor cores 4 and a filling material 5, the conductor cores 4 are mutually twisted, the outer sheath 6 is arranged between the conductor cores 4 and the fireproof layer 2, the outer sheath 6 is made of ceramic polyolefin material, and the conductor cores 4 and the outer sheath which are mutually twisted6, gaps are formed among the two, and filling materials 5 are arranged in the gaps; the filler 5 is made of inorganic fiber material.

Through the experiment, to adopting the utility model discloses a 1000V power frequency test voltage is applyed to the wire and cable of structure, lasts 180min of burning under 1000 ℃ fire source, and wire and cable does not take place to puncture.

The utility model discloses can form shell-shaped structure at 3 insulation hardening of insulating layer when the electric wire burning, the combustion process satisfies d0 grade requirement (be 1200S in no burning drippage/particle) of the fire-retardant requirement of B1 level, and the shell-shaped structure compactness that this pottery polyolefin material formed is good, exposes for a long time in the air not moisture absorption, and flame retardant coating 2 still has better insulating properties after the burning.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (6)

1. A flame-retardant fireproof electric wire is characterized by comprising a conductor (1), a fireproof layer (2) and an insulating layer (3);

the fireproof layer (2) is coated on the outer side of the conductor (1), and the insulating layer (3) is tightly extruded and coated on the outer side of the fireproof layer (2);

the insulating layer (3) comprises an insulating layer (3) of a ceramised polyolefin material;

and one side of the fireproof layer (2) facing the conductor (1) is provided with two layers of overlapped synthetic mica tapes.

2. The flame-retardant fireproof electric wire according to claim 1, wherein the overlapping rate of the two layers of overlapped synthetic mica tapes is 15% -35%.

3. Flame-retardant fireproof electric wire according to claim 1, wherein the width of the synthetic mica tape is 2.7-3.4 times the diameter of the conductor (1).

4. Flame-retardant fireproof electric wire according to claim 1, characterized in that the conductor (1) comprises a conductor (1) of solid copper, metallised copper or stranded copper material.

5. The flame retardant and flameproof electrical wire of claim 1, wherein the synthetic mica tape comprises a ceramized phlogopite tape.

6. A flame-retardant fireproof electric wire is characterized by comprising a conductor (1), a fireproof layer (2) and an insulating layer (3);

the fireproof layer (2) is coated on the outer side of the conductor (1), and the insulating layer (3) is tightly extruded and coated on the outer side of the fireproof layer (2);

the insulating layer (3) comprises an insulating layer (3) of a ceramised polyolefin material;

one side of the fireproof layer (2) facing the conductor (1) is provided with two layers of overlapped and lapped synthetic mica tapes;

the overlapping rate of the two layers of overlapped and lapped synthetic mica tapes is 15-35%;

the width of the synthetic mica tape is 2.7-3.4 times of the diameter of the conductor (1);

the conductor (1) comprises a conductor (1) made of solid copper, metal-plated copper or stranded copper material;

the synthetic mica tape comprises a ceramic gold mica tape.

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