CN217880940U

CN217880940U - Polyvinyl chloride insulation and sheath thin steel wire armored fire-resistant power cable

Info

Publication number: CN217880940U
Application number: CN202221360177.9U
Authority: CN
Inventors: 杨雷
Original assignee: Shandong Jinsheng Cable Co ltd
Current assignee: Shandong Jinsheng Cable Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-11-22
Anticipated expiration: 2032-06-01

Abstract

The utility model relates to the technical field of cables, specifically be an insulating and fire-resistant power cable of sheath thin steel wire armor of polyvinyl chloride, including a plurality of cable core, a plurality of that have the transmission electric energy the cable core is together fixed through the band, the cable core with clearance department between the band fills has the oxygen layer that separates that is used for isolated oxygen, the outside parcel in band has protect function's the thin steel wire armor of sheath. The utility model discloses the rock wool layer that sets up not only has superior fire-resistant ability, when meetting the condition of a fire, the rock wool layer can effectually prevent that the inside condition of catching fire of cable from producing to can prevent the condition of power transmission interrupt, the rock wool layer still possesses superior thermal-insulated ability simultaneously, when the cable is in during operation in the environment of high temperature, the rock wool layer can effectually insulate against heat, thereby can the maximize reduce the influence that the cable core received the temperature, has reduced the influence of high temperature to power transmission efficiency.

Description

Fire-resistant power cable with polyvinyl chloride insulation and sheath thin steel wire armor

Technical Field

The utility model relates to the technical field of cables, specifically be a fire-resistant power cable of thin steel wire armor of polyvinyl chloride insulation and sheath.

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. Power cables are cable products used in the trunk lines of power systems to transmit and distribute high power electrical energy, including various voltage classes, 1-500KV and above, and various insulated power cables.

The existing power cable is poor in heat insulation and fire resistance, when the power cable is used in a working environment with high temperature, the cable core inside the power cable is easily influenced by the temperature, although the high-temperature prevention measure of the cable in the working environment with high temperature is solved by the technical means of arranging the oxygen isolating layer in the prior art, the oxygen isolating layer has certain consumption when the high temperature is prevented, the high-temperature prevention function cannot be achieved after the consumption is completed, the cable core is used as a metal conductive material, the conductivity of the cable core is greatly influenced by the temperature, and when the temperature is too high, the conductivity of the cable core is reduced, so that the efficiency of power transmission can be reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an insulating and fire-resistant power cable of sheath thin steel wire armor of polyvinyl chloride to solve the problem that provides in the above-mentioned background art. In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an insulating and fire-resistant power cable of sheath thin steel wire armor of polyvinyl chloride, is including having a plurality of cable core of transmission electric energy, a plurality of the cable core is together fixed through the band, the cable core with clearance department between the band is filled has the oxygen layer that separates that is used for isolated oxygen, the outside parcel of band has protect function's sheath thin steel wire armor, the outside parcel of sheath thin steel wire armor has protect function's polyvinyl chloride insulating layer, the outside parcel of polyvinyl chloride insulating layer has thermal-insulated fire-retardant function's rock wool layer, the outside parcel on rock wool layer has the low smoke and zero halogen restrictive coating that reducible harmful gas generated when the heating.

Preferably, the sheath fine steel wire armor layer is of a cylindrical structure and is formed by interweaving a plurality of metal wires.

Preferably, the thicknesses of the wrapping tape, the polyvinyl chloride insulating layer and the low-smoke zero-halogen sheath layer are the same.

Preferably, the thickness of the sheath fine steel wire armor layer is half of that of the rock wool layer.

Preferably, the thickness of the rock wool layer is three times of that of the low-smoke halogen-free sheath layer.

Preferably, the outer wall of the oxygen isolation layer is bonded with the inner wall of the wrapping tape to form a sealing structure.

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

the utility model discloses the rock wool layer that sets up not only has superior fire resistance, and when meetting the condition of a fire, the rock wool layer can effectually prevent that the inside condition on fire of cable from producing to can prevent the condition of power transmission interrupt, the rock wool layer still possesses superior thermal-insulated ability simultaneously, when the cable is in during operation in the environment that the temperature is too high, the rock wool layer can be effectual thermal-insulated, thereby can the maximize reduce the influence that the cable core received the temperature, reduced high temperature to the influence of power transmission efficiency.

The utility model discloses the thin steel wire armor of sheath that sets up comprises a plurality of wire, and the thin steel wire armor of sheath can play certain shielding function, and the thin steel wire armor of sheath also can increase the intensity of cable self simultaneously to play certain protect function to the cable core.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of the sheath thin steel wire armor layer of the present invention;

fig. 3 is a schematic cross-sectional view of the present invention.

In the figure: 1. a cable core; 2. wrapping the belt; 3. an oxygen barrier layer; 4. a sheath thin steel wire armor layer; 5. a polyvinyl chloride insulating layer; 6. a rock wool layer; 7. a low-smoke halogen-free sheath layer.

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 embodiment in the present invention, all other embodiments obtained by the staff of ordinary skill in the art without creative work all belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: the utility model provides an insulating and fire-resistant power cable of sheath fine steel wire armor of polyvinyl chloride, is including a plurality of cable core 1 that has the transmission electric energy, a plurality of cable core 1 is together fixed through taking area 2, cable core 1 with clearance department between taking area 2 fills has the oxygen layer 3 that separates that is used for isolated oxygen, the outside parcel in taking area 2 has protect function's sheath fine steel wire armor 4, the outside parcel of sheath fine steel wire armor 4 has protect function's polyvinyl

chloride insulating layer

5, 5 outside parcels of polyvinyl chloride insulating layer have thermal-insulated fire-retardant function's rock wool layer 6, the outside parcel of rock wool layer 6 has the low smoke and zero halogen restrictive coating 7 that reducible harmful gas produced when heating.

In this embodiment, the sheath thin steel wire armor layer 4 is a cylindrical structure, and the sheath thin steel wire armor layer 4 is formed by interweaving a plurality of metal wires.

In this embodiment, the thicknesses of the belting 2, the polyvinyl chloride insulating layer 5 and the low-smoke zero-halogen sheath layer 7 are the same.

In this embodiment, the thickness of the sheath fine steel wire armor layer 4 is half of the thickness of the rock wool layer 6.

In this embodiment, the thickness of the rock wool layer 6 is three times that of the low-smoke halogen-free sheath layer 7.

In this embodiment, the outer wall of the oxygen barrier layer 3 is bonded to the inner wall of the bag strip 2 to form a sealing structure.

The utility model discloses a use method and advantage: when the power cable is used, the working process is as follows:

as shown in fig. 1 to 3, the oxygen barrier layer 3 is made of conventional aluminum hydroxide, manganese hydroxide and other substances, can generate crystal water at high temperature to reduce the temperature, the sheath thin steel wire armor layer 4 formed by interweaving a plurality of metal wires has a certain shielding effect on electromagnetic waves, can prevent the radiation generated by the power transmitted in the cable from affecting other equipment or people, and the rock wool layer 6 is made of rock wool into a cylindrical structure, and has the characteristics of fire prevention, flame retardance, small heat conductivity and heat absorption.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. The skilled worker in this industry should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the preferred embodiments of the present invention, and does not limit the present invention, without departing from the spirit and scope of the present invention, the present invention can also have various changes and improvements, and these changes and improvements all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an insulating and fire-resistant power cable of sheath fine steel wire armor of polyvinyl chloride, includes a plurality of cable core (1) that have the transmission electric energy, its characterized in that: a plurality of cable core (1) is together fixed through band (2), cable core (1) with clearance department between band (2) is filled with and is used for isolated oxygen separates oxygen layer (3), the outside parcel of band (2) has protect function's sheath thin steel wire armor (4), the outside parcel of sheath thin steel wire armor (4) has protect function's polyvinyl chloride insulating layer (5), polyvinyl chloride insulating layer (5) outside parcel has thermal-insulated flame retardant function's rock wool layer (6), the outside parcel of rock wool layer (6) has when heating reducible harmful gas generation's low smoke and zero halogen restrictive coating (7).

2. The polyvinyl chloride insulation and sheath fine steel wire armored fire-resistant power cable according to claim 1, wherein: the sheath thin steel wire armor layer (4) is of a cylinder structure, and the sheath thin steel wire armor layer (4) is formed by interweaving a plurality of metal wires.

3. The polyvinyl chloride insulation and sheath fine steel wire armored fire-resistant power cable according to claim 1, wherein: the thickness of the wrapping tape (2), the thickness of the polyvinyl chloride insulating layer (5) and the thickness of the low-smoke halogen-free sheath layer (7) are the same.

4. The polyvinyl chloride insulation and sheath fine steel wire armored fire-resistant power cable according to claim 1, wherein: the thickness of the sheath thin steel wire armor layer (4) is half of that of the rock wool layer (6).

5. The polyvinyl chloride insulation and sheath fine steel wire armored fire-resistant power cable according to claim 1, wherein: the thickness of the rock wool layer (6) is three times of that of the low-smoke halogen-free sheath layer (7).

6. The polyvinyl chloride insulation and sheath fine steel wire armored fire-resistant power cable according to claim 1, wherein: the outer wall of the oxygen isolation layer (3) is bonded with the inner wall of the bag belt (2) to form a sealing structure.