CN103474154A - Concentric conductor power cable - Google Patents

Abstract

The invention discloses a concentric conductor power cable which comprises three inner conductors, wherein each of the three inner conductors is coated with a modified silicone rubber insulation layer, thus forming an insulating inner cores; the three insulating inner cores are distributed into a triangle taking a center rope made of thermoplastic elastomer materials as a center, so as to form a cable core; the cross section of the center rope is in a shape of Y; a wrapping layer is arranged outside the cable core; a filling layer made of high-temperature resisting material is arranged between the wrapping layer and the cable core; a lining layer is arranged outside the wrapping layer; a circle of outer conductors which are distributed into a circle are arranged outside the lining layer; a winding layer is arranged outside the outer conductors; and outer sheath layer is wrapped outside the winding layer. The concentric conductor power cable is novel in structural design and has good flexibility, aging resistance, external electromagnetic field resistance, lightning stroke resistance and the like according to the structural design of the inner and the outer conductors matched with the center rope, the winding layer and other structures at the same time.

Description

A kind of concentric-conductor power cable

technical field:

The present invention relates to power cable, relate in particular to a kind of concentric-conductor power cable.

background technology:

The common a lot of operating characteristics of three cores, quad are poor; such as higher and inhomogeneous just (contrary) order and zero sequence working impedance; the action of short circuit automatic safety device is insensitive etc.; for under actual working environment, not meeting work requirements; therefore, need the construction of cable reasonable in design to solve above-mentioned technical problem.

summary of the invention:

In order to make up the prior art problem, the purpose of this invention is to provide a kind of concentric-conductor power cable, reasonable in design, have lower and uniformly just (contrary) order and zero sequence working impedance, is conducive to improve power supply quality, guarantees the safe operation of relevant device.

Technical scheme of the present invention is as follows:

Concentric-conductor power cable, comprise three inner wires, it is characterized in that: described three inner wires are coated with respectively the modified-silicon-rubber insulation layer outward and form three eradication edge inner cores, distribute in a triangle and form cable core centered by the axial cord that three eradication edge inner cores are made by thermoplastic elastic material, the axial cord cross section is Y shape, cable core is provided with belting layer outward, be provided with the packed layer that exotic material forms between belting layer and cable core, belting layer is provided with inner covering outward, inner covering is provided with the outer conductor that a ring shape distributes outward, outer conductor is provided with winding layer outward, winding layer is coated with external sheath layer.

Described concentric-conductor power cable is characterized in that: overlapping wrapped formation after described belting layer employing nylon tape and the adhesion of polyurethane tape phase, the wrapped rate of putting up is not less than 36%.

Described concentric-conductor power cable is characterized in that: described winding layer adopts aluminium-plastic tape and the wrapped formation in steel band interval, and the gap between aluminium-plastic tape and steel band is not more than 3mm.

Advantage of the present invention is:

Structural design novelty of the present invention by the structural design of internal and external conductor, coordinates the structures such as axial cord, winding layer simultaneously, makes cable have the performances such as good flexibility, resistance to ag(e)ing, anti-external electromagnetic field and anti-lightning.

the accompanying drawing explanation:

Fig. 1 is structural representation of the present invention.

embodiment:

Referring to Fig. 1:

Concentric-conductor power cable, comprise three inner wires 1, three outer modified-silicon-rubber insulation layers 2 that are coated with respectively of inner wire 1 form three eradication edge inner cores, distribute in a triangle and form cable core centered by the axial cord 3 that three eradication edge inner cores are made by thermoplastic elastic material, axial cord 3 cross sections are Y shape, cable core is provided with belting layer 4 outward, be provided with the packed layer 5 that exotic material forms between belting layer 4 and cable core, the outer inner covering 6 that is provided with of belting layer 4, the outer outer conductor 7 that is provided with a ring shape distribution of inner covering 6, the outer winding layer 8 that is provided with of outer conductor 7, winding layer 8 is coated with external sheath layer 9.

Overlapping wrapped formation after belting layer 4 employing nylon tapes and the adhesion of polyurethane tape phase, the wrapped rate of putting up is not less than 36%.

Winding layer 8 adopts aluminium-plastic tape and the wrapped formation in steel band interval, and the gap between aluminium-plastic tape and steel band is not more than 3mm.

External sheath layer 9 is coated with the insulating sleeve layer, and described insulating sleeve layer material is made by the raw material of following weight portion (kilogram):

SG-5 Corvic 100, nylon PA6 22, calcium carbonate 24, aluminium hydroxide 4, antimonous oxide 4, nano diatomite 14, lead stearate 3, chlorinated paraffin wax 8, zinc 2, titanate coupling agent TMC-TTS 2, talcum powder 21, dibutyl phthalate 3, compounded mix 5: described compounded mix is made by the raw material of following weight portion (kilogram): clay 10, schmigel 4, aluminium nitride 6, celestine 2, N-2-(aminoethyl)-3-aminopropyl trimethoxysilane 2, crosslinking agent TAC1, alum 8, zinc stearate 3, carborundum 1, ferrocene 2; The preparation method calcines clay, celestine 4-5 hour under 500-550 ℃, then, take out, add in suitable quantity of water and grind in the lump with alum, adding 10-15% hydrochloric acid solution tune PH is 4.-5.5, and ground slurry is to the 400-500 order, the repeated hydrogenation sodium oxide molybdena is adjusted to neutrality, filter washing, spray drying, obtain powder; The gained powder is mixed with other residual components, and ground and mixed evenly and get final product;

Described preparation method mixes nylon PA6, dibutyl phthalate, is heated to 220-230 ℃, then adds nano diatomite, lead stearate, chlorinated paraffin wax, aluminium hydroxide to stir kneading evenly; SG-5 Corvic, aluminium hydroxide, antimonous oxide are mixed simultaneously, be heated to 175-190 ℃, mixing kneading is even; Aforementioned nylon PA6 compound, SG-5 Corvic are mixed and merge, mix under 180-195 ℃, then add titanate coupling agent TMC-TTS, mediate after 10-15 minute, then add other residual components, mix 10-15 minute, granulate and get final product.

Insulating sleeve layer of the present invention has weatherability, cold resistance, the resistance to ag(e)ing of anti-flammability, pull resistance, excellence preferably.

 

Than common quad, the reactance value under the zero sequence operating state supports much concentric conductor of the present invention, is conducive to the sensitive action of short circuit automatic safety device, thereby guarantees the safe operation of relevant device.

 

Combustibility of the present invention, resistance, withstand voltage properties detect as following table:

Combustibility	Flame retardant cable can stand GB126.5(IEC332-3) regulation bunched burning test; Fire-resisting cable can stand GB126.6(IEC331) the fire-resistance property test of regulation
		Conductor resistance	Meet GB3956
Withstand voltage properties	Stand the 3.5kV power-frequency voltage test of 5min

Claims (4)

1. a concentric-conductor power cable, comprise three inner wires, it is characterized in that: described three inner wires are coated with respectively the modified-silicon-rubber insulation layer outward and form three eradication edge inner cores, distribute in a triangle and form cable core centered by the axial cord that three eradication edge inner cores are made by thermoplastic elastic material, the axial cord cross section is Y shape, cable core is provided with belting layer outward, be provided with the packed layer that exotic material forms between belting layer and cable core, belting layer is provided with inner covering outward, inner covering is provided with the outer conductor that a ring shape distributes outward, outer conductor is provided with winding layer outward, winding layer is coated with external sheath layer.

2. concentric-conductor power cable according to claim 1 is characterized in that: described belting layer adopts overlapping wrapped formation after nylon tape and the adhesion of polyurethane tape phase, and the wrapped rate of putting up is not less than 36%.

3. concentric-conductor power cable according to claim 1 is characterized in that: described winding layer adopts aluminium-plastic tape and the wrapped formation in steel band interval, and the gap between aluminium-plastic tape and steel band is not more than 3mm.

4. concentric-conductor power cable according to claim 1, is characterized in that described external sheath layer is coated with the insulating sleeve layer, and described insulating sleeve layer material is made by the raw material of following weight portion:

SG-5 Corvic 100-120, nylon PA6 18-22, calcium carbonate 24-28, aluminium hydroxide 3-4, antimonous oxide 4-5, nano diatomite 12-14, lead stearate 2-3, chlorinated paraffin wax 8-10, zinc 2-3, titanate coupling agent TMC-TTS 1-2, talcum powder 21-24, dibutyl phthalate 2-3, compounded mix 4-5: described compounded mix is made by the raw material of following weight portion: clay 10-12, schmigel 3-4, aluminium nitride 5-6, celestine 1-2, the N-2-(aminoethyl)-3-aminopropyl trimethoxysilane 2-3, crosslinking agent TAC1-2, alum 8-10, zinc stearate 2-3, carborundum 1-2, ferrocene 2-3, the preparation method calcines clay, celestine 4-5 hour under 500-550 ℃, then, take out, add in suitable quantity of water and grind in the lump with alum, adding 10-15% hydrochloric acid solution tune PH is 4.-5.5, and ground slurry is to the 400-500 order, the repeated hydrogenation sodium oxide molybdena is adjusted to neutrality, filter washing, spray drying, obtain powder, the gained powder is mixed with other residual components, and ground and mixed evenly and get final product,

Described preparation method mixes nylon PA6, dibutyl phthalate, is heated to 220-230 ℃, then adds nano diatomite, lead stearate, chlorinated paraffin wax, aluminium hydroxide to stir kneading evenly; SG-5 Corvic, aluminium hydroxide, antimonous oxide are mixed simultaneously, be heated to 175-190 ℃, mixing kneading is even; Aforementioned nylon PA6 compound, SG-5 Corvic are mixed and merge, mix under 180-195 ℃, then add titanate coupling agent TMC-TTS, mediate after 10-15 minute, then add other residual components, mix 10-15 minute, granulate and get final product.

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