CN214175758U

CN214175758U - Single-core insulating flame-retardant high-voltage cable

Info

Publication number: CN214175758U
Application number: CN202022872614.2U
Authority: CN
Inventors: 史波
Original assignee: Wuxi Shuguang Cable Co Ltd
Current assignee: Wuxi Shuguang Cable Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-09-10
Anticipated expiration: 2030-12-04

Abstract

The utility model discloses a single core insulation fire-retardant high tension cable, including the transposition copper core conductor, the lateral wall cover of transposition copper core conductor is equipped with the conductor shielding layer, the lateral wall of conductor shielding layer is equipped with the insulating layer, the lateral wall of insulating layer is equipped with the insulating shield layer, the lateral wall of insulating shield layer is equipped with the oxygen barrier layer, the upper surface on oxygen barrier layer is equipped with the metallic shield layer, the upper surface on metallic shield layer is equipped with fire-retardant inner protective layer; through setting up separation oxygen layer, release the crystal water under the high temperature condition to reduce the ignition point and reach the purpose that separates fire or even prevent fires, through setting up fire-retardant inner protective layer and fire-retardant outer protective layer, can ceramic rapidly in the combustion process, improve the intensity of burning residue greatly, reach the purpose of fire prevention back-fire relief, thereby prevent that its inside transposition copper core conductor from burning out, and then can not cause the harm that has a power failure.

Description

Single-core insulating flame-retardant high-voltage cable

Technical Field

The utility model relates to the technical field of cables, specifically a fire-retardant high tension cable of single core insulation.

Background

The wire and cable is used for transmitting electric (magnetic) energy, information and wire products for realizing electromagnetic energy conversion. A wire cable in a broad sense, also referred to as a cable for short, refers to an insulated cable, which can be defined as: an aggregate consisting of; one or more insulated wire cores, and their respective possible coatings, total protective layers and outer jackets, the cable may also have additional conductors without insulation.

The existing high-voltage cable does not have fireproof performance, and spontaneous combustion is easy to occur to the high-voltage cable when the current is too large, so that the problem of power failure caused by damage of the high-voltage cable is solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a single core insulation flame retardant high voltage cable to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a single-core insulating flame-retardant high-voltage cable comprises a stranded copper core conductor, wherein a conductor shielding layer is sleeved on the outer side wall of the stranded copper core conductor, an insulating layer is arranged on the outer side wall of the conductor shielding layer, an insulating shielding layer is arranged on the outer side wall of the insulating layer, an oxygen isolating layer is arranged on the outer side wall of the insulating shielding layer, a metal shielding layer is arranged on the upper surface of the oxygen isolating layer, a flame-retardant inner protective layer is arranged on the upper surface of the metal shielding layer, a shell body which is arranged in an equidistant mode is fixedly connected inside the insulating layer, the side, away from the insulating layer, of the shell body sequentially penetrates through the insulating shielding layer, the oxygen isolating layer, the metal shielding layer and the flame-retardant inner protective layer, two through grooves are symmetrically formed in the outer side wall of the shell body, an outer protective sleeve and an inner protective sleeve are connected to the, the lower surface of the inner protective sleeve is attached to the upper surface of the insulating shielding layer, and the upper surface of the inner protective sleeve is attached to the lower surface of the oxygen isolation layer.

As further preferable in the present technical solution: and a vinyl chloride protective layer is arranged on the upper surface of the flame-retardant inner protective layer.

As further preferable in the present technical solution: and a halogen-free wrapping tape is arranged on the upper surface of the vinyl chloride protective layer.

As further preferable in the present technical solution: and the upper surface of the halogen-free wrapping tape is provided with armor.

As further preferable in the present technical solution: and the upper surface of the armor is provided with a flame-retardant outer protective layer.

As further preferable in the present technical solution: the lower surface of outer protective sheath is equipped with low smoke and zero halogen protective layer, the lower surface of low smoke and zero halogen protective layer sets up in the upper surface of fire-retardant outer protective layer.

Compared with the prior art, the beneficial effects of the utility model are that:

firstly, through arranging the oxygen barrier layer, crystal water is released at high temperature, so that the ignition point is reduced to achieve the purpose of fire insulation and even fire prevention, through arranging the flame-retardant inner protective layer and the flame-retardant outer protective layer, the ceramic can be rapidly formed in the combustion process, the strength of combustion residues is greatly improved, and the purpose of fire prevention and fire retardation is achieved, so that the internal twisted copper core conductor is prevented from being burnt out, and further the power failure hazard is avoided;

and secondly, the outer protective sleeve and the inner protective sleeve are close to each other through the elastic potential energy of the tension spring, so that the connection between the layer bodies is firmer.

Drawings

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

fig. 2 is a schematic view of a connection structure of the stranded copper core conductor, the conductor shielding layer and the insulating layer of the present invention;

fig. 3 is a schematic view of the internal structure of the housing of the present invention;

FIG. 4 is a schematic view of the connection structure between the casing and the outer protective sheath of the present invention;

in the figure: 1. stranding a copper core conductor; 2. a conductor shield layer; 3. an insulating layer; 4. an insulating shield layer; 5. an oxygen barrier layer; 6. a metal shielding layer; 7. a flame retardant inner protective layer; 8. a vinyl chloride protective layer; 9. a halogen-free wrapping tape; 10. armoring; 11. a flame retardant outer protective layer; 12. a low smoke zero halogen protective layer; 13. a housing; 14. a through groove; 15. an outer protective sheath; 16. an inner protective sheath; 17. a tension spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1-4, the present invention provides a technical solution: a single-core insulating flame-retardant high-voltage cable comprises a stranded copper-core conductor 1, wherein a conductor shielding layer 2 is sleeved on the outer side wall of the stranded copper-core conductor 1, an insulating layer 3 is arranged on the outer side wall of the conductor shielding layer 2, an insulating shielding layer 4 is arranged on the outer side wall of the insulating layer 3, an oxygen-isolating layer 5 is arranged on the outer side wall of the insulating shielding layer 4, a metal shielding layer 6 is arranged on the upper surface of the oxygen-isolating layer 5, the upper surface of the metal shielding layer 6 is provided with a flame-retardant inner protective layer 7, a shell 13 which is arranged at equal intervals is fixedly connected inside the insulating layer 3, one side of the shell 13, far away from the insulating layer 3, sequentially penetrates through the insulating shielding layer 4, the oxygen-isolating layer 5, the metal shielding layer 6 and the flame-retardant inner protective layer 7, two through grooves 14 are symmetrically formed in the outer side wall of the shell 13, an outer protective sleeve 15 and an inner protective sleeve 16 are slidably connected on the inner side walls of the two through grooves 14, and a tension spring 17 is welded on one side of the outer protective sleeve 15, which is adjacent to the inner protective sleeve 16, the lower surface of the inner protective sleeve 16 is attached to the upper surface of the insulating shielding layer 4, and the upper surface of the inner protective sleeve 16 is attached to the lower surface of the oxygen barrier layer 5.

In this embodiment, specifically: a vinyl chloride protective layer 8 is arranged on the upper surface of the flame-retardant inner protective layer 7; polyvinyl chloride (PVC) is one of five thermoplastic synthetic resins, and is characterized by low price and high quality, accounts for about 29 percent of the total consumption of the synthetic resin, is second only to polyethylene, and is widely applied to various fields in industry, agriculture, buildings, electronic and electric appliances and people's life because the PVC resin has excellent chemical corrosion resistance, electrical insulation, flame retardance, light weight, high strength, easy processing and low cost.

In this embodiment, specifically: the upper surface of the chloroethylene protective layer 8 is provided with a halogen-free wrapping tape 9; halogen-free wrapping tape 9 is made of a cable non-woven fabric, has the characteristics of instant temperature resistance, 230 ℃ tolerance, no melting, no deformation, good corrosion resistance and vulcanization resistance, and can protect the vinyl chloride protective layer 8 from being damaged by armor skin when the cable armor 10 by arranging the halogen-free wrapping tape 9, play roles of buffering and lining, and also play different roles of heat insulation, corrosion resistance, aging resistance and the like on the vinyl chloride protective layer 8.

In this embodiment, specifically: the upper surface of the halogen-free wrapping tape 9 is provided with an armor 10; the sheathing 10 means that the cable to be subjected to large mechanical forces should have a sheathing layer, i.e. a layer of metal protection is added on the outermost side of the product to prevent the inner utility layer from being damaged during transportation and installation.

In this embodiment, specifically: the upper surface of the armor 10 is provided with a flame-retardant outer protective layer 11; the flame-retardant outer protective layer 11 is made of ceramic silicon rubber, and can improve the flame-retardant and fire-resistant performance of the cable.

In this embodiment, specifically: the lower surface of the outer protective sleeve 15 is provided with a low-smoke halogen-free protective layer 12, and the lower surface of the low-smoke halogen-free protective layer 12 is arranged on the upper surface of the flame-retardant outer protective layer 11; by arranging the low-smoke halogen-free protective layer 12, the situation that in case of fire, the low-smoke halogen-free protective layer 12 generates combustion and does not emit harmful gas can be prevented, so that fire fighters can easily enter the scene and are not harmed due to toxic smoke.

Working principle or structural principle, when in use, the outer side wall of the twisted copper core conductor 1 is sleeved with the conductor shielding layer 2, the twisted copper core conductor 1 has the advantages of high tensile strength, stable operation and high conductivity, then the conductor shielding layer 2 is a shielding structure formed by tightly wrapping a semi-conductive material outside a wire and tightly combining with the inner surface of an insulator, the conductor shielding layer 2 forms a Falali cage and effectively fills an air gap between the conductor and the insulator to prevent air gap discharge between the conductors, then the outer side wall of the conductor shielding layer 2 is sleeved with the main insulating layer 3, the main insulating layer 3 is made of organic silicon resin, the outstanding performance of the organic silicon resin is excellent electric insulating performance, good insulating performance can be kept in wide temperature and frequency ranges, the insulating shielding layer 4 can control the cable to be prevented from being damaged by the insulator at the same time, The system which can not work normally under the influence of mechanical damage, fire or electrical interference and the like and needs to enhance the reliability of current, voltage, a direct current power supply, a trip control loop and the like of double protection adopts independent control cables, the oxygen isolating layer 5 is made of aluminum hydroxide and releases crystal water under the condition of high temperature, so that the ignition point is reduced to achieve the purpose of isolating fire and even preventing fire, then the outer side wall of the oxygen isolating layer 5 is provided with a metal shielding layer 6, the metal shielding layer 6 is grounded, so that the insulating shielding layer 4 is at zero potential, and the electric field is effectively limited in the system; then, the outer side wall of the metal shielding layer 6 is provided with a flame-retardant inner protective layer 7, the flame-retardant inner protective layer 7 is cross-linked insulating polyvinyl chloride, the polyvinyl chloride is thermoplastic resin prepared by polymerizing ethylene, and in industry, the polyvinyl chloride also comprises a copolymer of ethylene and a small amount of alpha-olefin, the polyethylene is odorless and nontoxic, has a hand feeling similar to wax, has excellent low-temperature resistance (the lowest using temperature can reach-100 to 70 ℃), has good chemical stability, can resist corrosion of most acid and alkali (cannot resist acid with oxidation property), is insoluble in common solvents at normal temperature, has small water absorption and excellent electrical insulation, the vinyl chloride protective layer 8 has the characteristics of high mechanical strength, impact resistance, environmental stress cracking resistance, corrosion resistance, low temperature resistance, easy welding, simple and convenient construction, strict sealing without leakage, long service life and the like, and then the halogen-free wrapping tape 9 is arranged to protect the vinyl chloride protective layer 8 from being damaged by skin when the cable armor 10, the fireproof and fireproof low-smoke halogen-free protective layer has the functions of buffering and lining, can also have different functions of heat insulation, corrosion resistance, aging resistance and the like on the vinyl chloride protective layer 8, can prevent an internal utility layer from being damaged in transportation and installation by arranging the armor 10, the fireproof inner protective layer 7 and the fireproof outer protective layer 11 are both made of ceramic silicon rubber, the non-toxic and environment-friendly performance of the fireproof and fireproof low-smoke halogen-free protective layer meets the RoHS instruction regulation of the European Union, and the fireproof and fireproof low-smoke halogen-free protective layer 12 has a unique ceramic mechanism to ensure that the silicon rubber can be rapidly ceramic in the combustion process, greatly improve the strength of combustion residues and achieve the purposes of fire prevention and fire retardation, so that in case of fire, the low-smoke halogen-free protective layer 12 cannot emit harmful gas during combustion, so that fire fighters can easily enter a site and cannot be harmed due to toxic smoke, and the lower surface of the inner protective layer 16 is adhered to the upper surface of the insulating and shielding layer 4, the lower surface of the outer protective sleeve 15 is attached to the upper surface of the low-smoke halogen-free protective layer 12, and then the layers are close to each other through the elastic potential energy of the tension spring 17, so that the connection between the layers is firmer, wherein the inner protective sleeve 16 and the outer protective sleeve 15 are both made of ethylene propylene rubber insulation, the aging resistance is excellent, the best in the existing general rubber, and the rubber has good insulation performance and corona resistance.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fire-retardant high tension cable of single core insulation, includes transposition copper core conductor (1), its characterized in that: the outer side wall of the stranded copper core conductor (1) is sleeved with a conductor shielding layer (2), the outer side wall of the conductor shielding layer (2) is provided with an insulating layer (3), the outer side wall of the insulating layer (3) is provided with an insulating shielding layer (4), the outer side wall of the insulating shielding layer (4) is provided with an oxygen isolating layer (5), the upper surface of the oxygen isolating layer (5) is provided with a metal shielding layer (6), the upper surface of the metal shielding layer (6) is provided with a flame-retardant inner protective layer (7), the inner part of the insulating layer (3) is fixedly connected with a shell (13) which is arranged at equal intervals, one side of the shell (13) far away from the insulating layer (3) sequentially penetrates through the insulating shielding layer (4), the oxygen isolating layer (5), the metal shielding layer (6) and the flame-retardant inner protective layer (7), the outer side wall of the shell (13) is symmetrically provided with two through grooves (14), two the inside wall sliding connection who leads to groove (14) has outer protective sheath (15) and interior protective sheath (16), one side welding that outer protective sheath (15) and interior protective sheath (16) are adjacent has extension spring (17), the lower surface laminating of interior protective sheath (16) is in the upper surface of insulating shield (4), the upper surface laminating of interior protective sheath (16) is in the lower surface that separates oxygen layer (5).

2. The single-core insulated flame-retardant high-voltage cable according to claim 1, characterized in that: and a vinyl chloride protective layer (8) is arranged on the upper surface of the flame-retardant inner protective layer (7).

3. The single-core insulated flame-retardant high-voltage cable according to claim 2, characterized in that: and a halogen-free wrapping tape (9) is arranged on the upper surface of the chloroethylene protective layer (8).

4. A single core insulated flame retardant high voltage cable according to claim 3, characterized in that: and the upper surface of the halogen-free wrapping tape (9) is provided with an armor (10).

5. The single-core insulated flame-retardant high-voltage cable according to claim 4, characterized in that: and the upper surface of the armor (10) is provided with a flame-retardant outer protective layer (11).

6. The single-core insulated flame-retardant high-voltage cable according to claim 1, characterized in that: the lower surface of outer protective sheath (15) is equipped with low smoke and zero halogen protective layer (12), the lower surface of low smoke and zero halogen protective layer (12) sets up in the upper surface of fire-retardant outer protective layer (11).