CN218274083U

CN218274083U - Environment-friendly polypropylene insulation flame-retardant power cable

Info

Publication number: CN218274083U
Application number: CN202221082204.0U
Authority: CN
Inventors: 胡少中; 戴辉; 杨磊
Original assignee: Gold Cup Electric Hengyang Cable Co Ltd
Current assignee: Gold Cup Electric Hengyang Cable Co Ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2023-01-10
Anticipated expiration: 2032-05-07

Abstract

The utility model discloses an insulating fire-retardant power cable of environment-friendly polypropylene, a serial communication port, include: three twists cable together, winding fire-retardant band layer, cladding fire-retardant isolation layer, the cladding metal armor outside the fire-retardant isolation layer and the cladding fire-retardant outer jacket outside the metal armor outside fire-retardant band layer on the cable, wherein: polypropylene filler is filled between the flame-retardant wrapping band layer and the three stranded cables. The utility model discloses environment-friendly polypropylene insulation power cable's electrical property, low cigarette, zero halogen, fire behaviour are excellent, but reduction in production cost, shorten production cycle, reduce environmental pollution green.

Description

Environment-friendly polypropylene insulation flame-retardant power cable

Technical Field

The utility model relates to the technical field of cables, in particular to flame-retardant power cable of environment-friendly polypropylene insulation.

Background

At present, medium voltage power cable insulation is based on crosslinked polyethylene as the main insulating material. Crosslinked polyethylene is a thermosetting material produced by cross-linking molecular chains of polyethylene into a three-dimensional network structure by a crosslinking means. Compared with polyethylene, XLPE has higher thermal property and mechanical property, and keeps the advantages of high insulation resistance, good electric resistance and small dielectric loss of polyethylene. However, with the large scale use of XLPE insulation, some problems are also exposed:

(1) Crosslinking byproducts generated in the XLPE crosslinking process can still remain in the cable after degassing, and the mechanical property and the electrical property of insulation are influenced;

(2) The production process is complex, the working procedures of cross-linking, degassing and the like occupy large space, the energy consumption is high, and the production efficiency is low;

(3) The XLPE insulating material is a thermosetting material, and XLPE cables are difficult to recycle after being retired, so that wastes damage the environment.

Compared with the prior art, the polypropylene has good chemical corrosion resistance and electrical insulation, cross-linking and degassing treatment are not needed in the production process, pollution and energy consumption in the production process are reduced, and the polypropylene can be recycled, so that the requirements of environmental protection and low carbon are met. In addition, polypropylene has resistance to thermal deformation at higher temperatures.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that current middling pressure power cable insulation exists, the utility model provides an electrical property, low cigarette, no halogen, fire behaviour are excellent, but reduction in production cost, shorten production cycle, reduce environmental pollution green's environment-friendly polypropylene insulation power cable.

In order to achieve the above object, the present invention provides an environment-friendly polypropylene insulated flame-retardant power cable, comprising: three twists cable together, winding fire-retardant band layer, cladding fire-retardant isolation layer, the cladding metal armor outside the fire-retardant isolation layer and the cladding fire-retardant outer jacket outside the metal armor outside fire-retardant band layer on the cable, wherein: and polypropylene filler is filled between the flame-retardant wrapping band layer and the three stranded cables. The cable meets the requirement of GB/T19666 on flame retardant performance by adopting a combination form of a flame retardant belting layer, a flame retardant isolation layer, a metal armor layer and a flame retardant outer protective layer.

In a preferred embodiment of the present invention, each cable comprises: the cable comprises a conductor, a polypropylene conductor shielding layer coated outside the conductor, a polypropylene insulating layer coated outside the polypropylene conductor shielding layer, a polypropylene insulating shielding layer coated outside the polypropylene insulating layer, and a metal shielding layer coated outside the polypropylene insulating shielding layer. Each cable has excellent electrical insulation performance and green and recyclable characteristics by adopting a combination form of a polypropylene conductor shielding layer, a polypropylene insulating layer and a polypropylene insulating shielding layer.

In a preferred embodiment of the utility model, the conductor adopts a plurality of cable conductor monofilament transposition to form, makes between the cable conductor monofilament nearly seamless, and steam can't follow the conductor and further permeate to inside to satisfy the vertical water blocking performance requirement of cable.

Owing to adopted above technical scheme, the utility model discloses compare with the insulating power cable of XLPE and have following advantage:

(1) the polypropylene insulation is a thermoplastic material, and after the product is retired, the insulation material can be recycled, so that the requirement of environmental protection is met;

(2) the polypropylene insulation extrusion process does not need crosslinking and has no pollution; the vulcanization pipe is not required to be heated, and the production energy consumption is low;

(3) the polypropylene has good chemical corrosion resistance and electrical insulation, crosslinking and degassing treatment are not needed in the insulation production process, and the insulation performance is more stable.

(4) The utility model discloses the highest operating temperature can reach 105 ℃, improves 15 ℃ than XLPE temperature resistant grade, and with specification current-carrying capacity promoted 5% -10%, improved the operational capability of cable.

(5) The utility model discloses a conductor adopts the transposition of a plurality of cable conductor monofilaments to form, makes between the cable conductor monofilament nearly seamless, and steam can't follow the conductor and further permeates to inside, and the cable is laying the operation in-process like this, and inside steam extremely difficult entering into the cable from the cable head, and the polypropylene insulation is extremely difficult to produce the water tree in the inside operation process simultaneously, has further ensured the performance of cable.

(6) The utility model discloses need not carry out the cross-linking reaction at insulating process, production efficiency can improve 20-50% than crosslinked polyethylene cable.

(7) The utility model discloses need not vulcanize the pipe heating in the insulating production process of polypropylene, the production energy consumption is low, has saved a large amount of energy, can not produce waste gas, and is more energy-concerving and environment-protective.

Drawings

Figure 1 is the utility model discloses environment-friendly polypropylene insulation fire-retardant power cable's section schematic diagram.

Detailed Description

The invention is further described below with reference to the accompanying drawings and the detailed description.

Referring to fig. 1, the environment-friendly polypropylene insulated flame retardant power cable shown in the figure comprises: the cable comprises three stranded cables, a flame-retardant wrapping layer 07 wound on the cable, a flame-retardant isolation layer 08 coated outside the flame-retardant wrapping layer 07, a metal armor layer 09 coated outside the flame-retardant isolation layer 08 and a flame-retardant outer protective layer 10 coated outside the metal armor layer 09, wherein: and polypropylene filling materials 06 are filled between the flame-retardant wrapping layer 07 and the three stranded cables. The cable meets the requirement of GB/T19666 on flame retardant performance by adopting a combination form of a flame retardant belting layer, a flame retardant isolation layer, a metal armor layer and a flame retardant outer protective layer.

Each cable includes: the cable comprises a conductor 01, a polypropylene conductor shielding layer 02 coated outside the conductor 01, a polypropylene insulating layer 03 coated outside the polypropylene conductor shielding layer 02, a polypropylene insulating shielding layer 04 coated outside the polypropylene insulating layer 03, and a metal shielding layer 05 coated outside the polypropylene insulating shielding layer 04. Each cable has excellent electrical insulation performance and green recoverable characteristics by adopting a combination form of the polypropylene conductor shielding layer 02, the polypropylene insulating layer 03 and the polypropylene insulating shielding layer 04.

The conductor 01 is formed by twisting a plurality of cable conductor monofilaments, so that gaps are almost not formed among the cable conductor monofilaments, and water vapor cannot further permeate into the conductor along the conductor, thereby meeting the requirement of the longitudinal water resistance of the cable.

Claims

1. The utility model provides an insulating fire-retardant power cable of environment-friendly polypropylene which characterized in that includes: three twists cable together, winding fire-retardant band layer, cladding fire-retardant isolation layer, the cladding metal armor outside the fire-retardant isolation layer and the cladding fire-retardant outer jacket outside the metal armor outside fire-retardant band layer on the cable, wherein: polypropylene filler is filled between the flame-retardant wrapping band layer and the three stranded cables.

2. The environment-friendly polypropylene insulated flame-retardant power cable according to claim 1, wherein each cable comprises: the cable comprises a conductor, a polypropylene conductor shielding layer coated outside the conductor, a polypropylene insulating layer coated outside the polypropylene conductor shielding layer, a polypropylene insulating shielding layer coated outside the polypropylene insulating layer, and a metal shielding layer coated outside the polypropylene insulating shielding layer.

3. The environment-friendly polypropylene insulated flame-retardant power cable as claimed in claim 2, wherein the conductor is formed by twisting a plurality of cable conductor monofilaments so that there are almost no gaps between the cable conductor monofilaments.