CN2613861Y

CN2613861Y - Three-core tile-shaped shielding type power cable

Info

Publication number: CN2613861Y
Application number: CN 03233162
Authority: CN
Inventors: 彭书礼; 周厚强
Original assignee: DEYANG CABLE Co Ltd
Current assignee: Tebian Electrical Apparatus Deyang Cable Co., Ltd.
Priority date: 2003-02-13
Filing date: 2003-02-13
Publication date: 2004-04-28
Anticipated expiration: 2013-02-13

Abstract

The utility model discloses a three core tegular shielding type power cable which can not only prevent the cable from generating the interferences such as the ultraharmonics and other electromagnetic radiation to the surrounding devices in the process of operation, but also effectively prevent the external electromagnetic signal interfering to the power supply cable. The utility model comprises a conductor, an insulation layer, a metallized shield layer and a restrictive coating, wherein the conductor includes a three core main conductor and the fourth core zero-sequence conductor, which is characterized in that the bundle of the middle portion of the three core tegular insulation layer turns around the conductor insulation reinforcing layer of the fourth core zero-sequence conductor and is positioned in the isolated layer outside the insulation layer and inside the metallized shield layer, also in the isolated layer outside the metallized shield layer and inside the restrictive coating. The utility model achieves lower electrical impedance, and has high level of capability of anti-electromagnetic interference and restraining the electromagnetic interference radiation to the surrounding space, also has the advantages of compact structure, smaller size, easy manufacturing technique, high quality, good price performance and satisfying electrified railway variable frequency driving and other various places which has strict shielding requirement with the power cable.

Description

Three cores watt shape shield type power cable

Technical field:

The utility model relates to a kind of power cable technology, particularly a kind ofly can prevent that this high order harmonic component of producing of cable and other electromagnetic radiation to the interference of surrounding devices, can effectively prevent the three cores watt shape shield type power cable that the external electromagnetic signal disturbs service cable self again in running.

Background technology:

The power cable of Chu Shouing is mainly the product that meets State Standard of the People's Republic of China GB12706 regulation in the market, does not stipulate the shield type cable in this standard.In order to satisfy the demand that power cable is applicable to the place of shielding requirements, indivedual manufacturer production the power cable of the wrapped type of a kind of copper strips, its structure is on the basis of ordinary construction cable, the outer wrapped one deck copper strips of cable core, this kind cable can play certain shield effectiveness to the electromagnetic interference in the certain frequency, but its shield effectiveness is very poor under high frequency, cable screen under the zero sequence operating state can produce induced current, surrounding space is produced electromagnetic radiation, thereby can not be applied to the place higher shielding requirements.Simultaneously, the stranding of cable usually adopts the stranding modes of three fans, one circle, and its physical dimension is bigger, the four-core conductor in working order the time shielding can produce bigger induced current, electromagnetic interference is bigger.

Summary of the invention:

Goal of the invention of the present utility model is intended to overcome the deficiencies in the prior art, provide a kind of and can prevent that this high order harmonic component that produces of cable and other electromagnetic radiation to the interference of surrounding devices, can effectively prevent the shield type power cable that the external electromagnetic signal disturbs service cable self again in running.This cable has lower electrical impedance, small construction size and lower electromagnetic radiation, its compact conformation, and antijamming capability is strong, can satisfy in the requirement that has higher shielding place to use.

Concrete technical scheme of the present utility model is as follows:

The utility model comprises conductor, insulating barrier, metal screen layer and restrictive coating, conductor comprises three core leading bodies and four-core zero sequence conductor, it is characterized in that: also comprise the insulating barrier centre position that is positioned at three cores watt shape the conductor insulation reinforced layer that holds four-core zero sequence conductor, be positioned at the separator of the outer and metal screen layer of insulating barrier and the separator that metal screen layer is outer and restrictive coating is interior.

Conductor described in the utility model is the stranded structure of pressing of multicore, and four-core zero sequence conductor is arranged at the symmetry place, space at three core leading bodies middle part.

Insulating barrier described in the utility model is crosslinkable polyethylene or polyvinyl chloride.

Separator described in the utility model is the wrapped structure of Biaxially oriented polypropylene band.

Metal screen layer described in the utility model is that copper wire adds that copper is moulded, the wrapped combining structure of the metal tape of plastic-aluminum.

Restrictive coating described in the utility model is the heat-resistant polyvinyl chloride layer.

The utlity model has following advantage:

1) conductor adopts the stranded structure of pressing, and overall dimension is little, can effectively stop moisture to enter, and has improved the reliable long-term working of cable;

2) the four-core conductor of cable is arranged in the middle of the three core main lines, has realized the space symmetry of structure fully, has improved the ability of the inhibition electromagnetic radiation under the cable zero sequence operating state;

3) adopt four-core insulation reinforced layer, solved the leading body watt problem that shape processing can't realize;

4) adopt copper wire or copper wire to add that copper is moulded, the wrapped combining structure of the metal tape of plastic-aluminum, can prevent effectively that high order harmonic component is to the interference of other electronic equipment in the cable, cable has possessed stronger electromagnetic shielding work efficiency;

5) structural design of screened cushion, the wrapped structure of double-layer double-direction oriented polypropylene band has the advantages that dielectric constant is little, electrical strength is high, can fully guarantee the dielectric strength of screen to conductor or ground.

6) crosslinkable polyethylene insulating barrier and heat-resistant polyvinyl chloride protective sleeve have improved the long-term work temperature of conductor.

Description of drawings:

Fig. 1: the utility model cross-sectional structure schematic diagram

1 conductor, 2 insulating barriers, 3 insulation reinforced layers, 4 separators, 5 metal screen layers, 6 separators, 7 restrictive coatings, 8 four-core zero sequence conductors, 9 three core leading bodies

Embodiment:

The utility model comprises conductor 1, insulating barrier 2, metal screen layer 5 and restrictive coating 7, conductor 1 comprises three core leading bodies 9 and four-core zero sequence conductor 8, it is characterized in that: also comprise insulating barrier 2 centre positions that are positioned at three cores watt shape the conductor insulation reinforced layer 3 that holds four-core zero sequence conductor 8, be positioned at the separator 4 of the outer and metal screen layer 5 of insulating barrier 2, and the separator 6 that metal screen layer 5 is outer and restrictive coating 7 is interior.

Conductor 1 described in the utility model is the stranded structure of pressing of multicore, and four-core zero sequence conductor 8 is arranged at the symmetry place, space at three core leading bodies, 9 middle parts.

Insulating barrier 2 described in the utility model is crosslinkable polyethylene or polyvinyl chloride.

Separator 4 described in the utility model and separator 6 are the wrapped structure of Biaxially oriented polypropylene band.

Metal screen layer 5 described in the utility model is moulded for copper wire adds copper, the wrapped combining structure of metal tape of plastic-aluminum.

Restrictive coating 7 described in the utility model is the heat-resistant polyvinyl chloride layer.

This product specification:

Rated voltage (KV): 0.6/1

(mm is amassed in the conductor standard section ²): 〉=50 ,≤400

Cable core number: 4 cores

Main field of employment: be laid in indoor or cable trough, cable duct, cable testing bridge in, and the fixedly field of employment higher to shielding requirements.

The utlity model has lower electrical impedance, possess the anti-electromagnetic interference capability of higher level and suppress the ability of space radiation electromagnetic interference towards periphery, its compact conformation, overall dimension is less, production technology is simple, the cost performance height can satisfy electric railway, frequency conversion drive and other various places that service cable had strict shielding requirements.

Claims

1, three cores watt shape shield type power cable, comprise conductor (1), insulating barrier (2), metal screen layer (5) and restrictive coating (7), conductor (1) comprises three core leading body (9) and four-core zero sequence conductors (8), it is characterized in that: also comprise insulating barrier (2) centre position that is positioned at three cores watt shape the conductor insulation reinforced layer (3) that holds four-core zero sequence conductor (8), be positioned at the separator (4) of the outer and metal screen layer (5) of insulating barrier (2), and metal screen layer (5) is outward and the interior separator (6) of restrictive coating (7).

2, three cores according to claim 1 watt shape shield type power cable is characterized in that: described conductor (1) is the stranded structure of pressing of multicore, and four-core zero sequence conductor (8) is arranged at the symmetry place, space at three core leading bodies (9) middle part.

3, three cores according to claim 1 watt shape shield type power cable, it is characterized in that: described insulating barrier (2) is crosslinkable polyethylene or polyvinyl chloride.

4, three cores according to claim 1 watt shape shield type power cable is characterized in that: described separator (4) and separator (6) are the wrapped structure of Biaxially oriented polypropylene band.

5, three cores according to claim 1 watt shape shield type power cable is characterized in that: mould, the wrapped combining structure of the metal tape of plastic-aluminum by copper for copper wire or copper wire add for described metal screen layer (5).

6, three cores according to claim 1 watt shape shield type power cable, it is characterized in that: described restrictive coating (7) is the heat-resistant polyvinyl chloride layer.