CN203377010U

CN203377010U - Variable frequency cable

Info

Publication number: CN203377010U
Application number: CN201320262149.8U
Authority: CN
Inventors: 苏华光
Original assignee: HUNAN JINLONG CABLE CO Ltd
Current assignee: HUNAN JINLONG CABLE CO Ltd
Priority date: 2013-05-15
Filing date: 2013-05-15
Publication date: 2014-01-01
Anticipated expiration: 2023-05-15

Abstract

The utility model discloses a variable frequency cable, comprising a cabling wrapping layer, an outer sheath and a magnetic conductor shielding copper strip layer arranged between the cabling wrapping layer and the outer sheath. According to the variable frequency cable, the magnetic conductor shielding copper strip layer is employed instead of the prior wrapping conductor shielding material and magnetic steel strip material, an intermediate sleeve is saved, high strength is provided, good anti-compression performance is shown, and the internal structure of the cable is protected. According to the variable frequency cable, the electric field and magnetic field shielding requirement of the cable is satisfied, the conductivity is more than 80% (IACS), the intensity is more than 380 MPA, the magnetic conductibility is consistent to a steel strip, the steel strip and the intermediate sleeve are saved, materials are saved, the external diameter of the cable is reduced by 5% to 15%, the weight of the cable is reduced by 5% to 20%, and costs are decreased.

Description

Frequency-changing cable

Technical field

The utility model relates to technical field of electric wires and cables, relates in particular to a kind of frequency-changing cable.

Background technology

Frequency-changing cable is mainly used in connecting between variable frequency power supply and variable-frequency motor the cable of use, particularly in rated voltage 1KV and following transmission of electricity electric line, because it has energy-conservation and dual-use function environmental protection, with the conventional art ratio, can save energy about 10 %-35%, be widely used in the industries such as machine-building, metallurgy, metal processing, papermaking, mine, water supply, railway, medicine food processing, household electrical appliances air-conditioning.

Yet, there is certain interference in high order harmonic component in frequency changer circuit to environment, in order to eliminate this interference, as shown in Figure 3, existing frequency-changing cable all needs the copper strips layer A electric field shielding that first adopts conductor material to make, the steel belt layer C armoured magnetic field that adopts again magnetic material to make, for avoiding two kinds of different metal materials directly to contact, prevent that its couple corrosion from damaging, between copper strips layer A and steel belt layer C, also need to set up the complex structure that an intermediate sleeve B causes frequency-changing cable, manufacturing cost is also high than common cable.

The utility model content

The purpose of this utility model is to provide a kind of electric field shielding and magnetic field and frequency-changing cable simple in structure simultaneously.

The frequency-changing cable that the utility model provides, comprise stranding lapping layer and oversheath, also comprises the magnetic conductor shielding copper strips layer be arranged between described stranding lapping layer and oversheath.

Also comprise copper wire between described stranding lapping layer and magnetic conductor shielding copper strips layer.

The utility model, by adopting magnetic conductor shielding copper strips layer to replace original turnkey conductor screen material and magnetic steel carrying material, can omit intermediate sleeve, also has intensity high, and good crushing resistance, can protect the cable internal structure simultaneously.The utility model not only can meet the requirement of cable to electric field shielding and magnetic field, its conductance 80%(IACS) more than, intensity is more than 380MPA, magnetic conductivity is identical with steel band, also remove steel belt layer and intermediate sleeve, save material, make the external diameter of cable reduce 5%--15%, the weight saving 5%---20% of cable, reduce costs.

The accompanying drawing explanation

The structural representation that Fig. 1 is the utility model embodiment mono-.

The structural representation that Fig. 2 is the utility model embodiment bis-.

The structural representation that Fig. 3 is prior art.

Embodiment

Embodiment mono-

As can be seen from Figure 1, the balanced structure frequency-changing cable of this ground of the utility model line splitting, comprise three phase isolated cable 1, division ground wire 2, inserts 3, stranding lapping layer 4, magnetic conductor copper strips layer 5 and oversheath 6, the symmetrical stranding of three phase isolated core 1, comprise some conductors 11 and hold around successively insulating barrier 12 and the phase-splitting screen 13 in the conductor periphery, wherein insulating barrier 12 is crosslinked polyetylene insulated layer, phase-splitting screen 13 is at least overlapping wrapped one deck copper strips, division ground wire 2 is between each three phase isolated core 1, inserts 3 is filled in the space of each three phase isolated core 1 and division ground wire 2, stranding lapping layer 4, magnetic conductor shielding copper strips layer 5 and oversheath 6 be wrapped in successively inserts 3 outside, wherein inserts 3 is the polypropylene tearing band, stranding lapping layer 4 is polypropylene tape or nonwoven fabrics.

Embodiment bis-

As can be seen from Figure 2, this frequency converter cable with concentric conductors of the utility model, comprise three phase isolated cable 1, inserts 2, stranding lapping layer 3, copper wire 4, magnetic conductor shielding copper strips layer 5 and oversheath 6, the symmetrical stranding of three phase isolated core 1, comprise some conductors 11 and hold around successively insulating barrier 12 and the phase-splitting screen 13 in the conductor periphery, wherein insulating barrier 12 is crosslinked polyetylene insulated layer, phase-splitting screen 13 is at least overlapping wrapped one deck copper strips, inserts 2 is filled in the space of each three phase isolated core 1 and adopts the polypropylene tearing band, stranding lapping layer 3 is polypropylene tape or nonwoven fabrics the periphery that is wrapped in inserts 2, copper wire 4, magnetic conductor shielding copper strips layer 5 and oversheath 6 are wrapped in outside stranding lapping layer 3 successively, copper wire 4 is for dredging around copper wire and reverse wrapped magnetic conductor shielding copper strips, oversheath 6 adopts extrusion molding high density polyethylene (HDPE) or low-smoke halogen-free polyolefin.

Claims

1. a frequency-changing cable, comprise stranding lapping layer and oversheath, it is characterized in that: also comprise the magnetic conductor shielding copper strips layer be arranged between described stranding lapping layer and oversheath.

2. frequency-changing cable according to claim 1, is characterized in that: between described stranding lapping layer and magnetic conductor shielding copper strips layer, also comprise copper wire.