CN103928159A - Fire-resistant power cable - Google Patents

Abstract

The invention discloses a fire-resistant power cable which comprises multiple wires. The wires are divided into five groups and are wrapped by insulating layers respectively to form five insulating inner cores, the fiver insulating inner cores are wrapped by a ceramic silicon rubber fire-resistant layer mutually, the ceramic silicon rubber fire-resistant layer is filled with alkali-free containing glass fiber cloth, and the ceramic silicon rubber fire-resistant layer is wrapped by a silicone rubber inner sheath layer, a steel tape armoring layer and an outer sheath. The fire-resistant power cable is simple in structural layer and has strong fire-resistant performance, and the integral mechanical properties of the power cable are not influenced.

Description

Fireproof power cable

technical field:

The present invention relates to cable, is mainly a kind of fireproof power cable.

background technology:

Power cable is mainly used for transmission and distributes the cable of electric energy.Be usually used in the lead line in Urban Underground electrical network, power station, in power circuit, the shared proportion of cable increases just gradually, thereby the power cable of the various type of performance generation of meeting the tendency, especially fireproof power cable, it is as lead-out wire, and fire resistance not only will be got well, and will have stronger mechanical performance simultaneously.Traditional cable jacket material hot strength and shock strength, corrosion resistance, creep resistance, resistance to wear Shortcomings situation.

summary of the invention:

Technical problem to be solved by this invention is to provide a kind of fireproof power cable, and its layer of structure is simple, but has stronger fire resistance, and does not affect the mechanical performance of power cable entirety.Cable jacket material excellent combination property of the present invention, toughness is high, there is good chemical stability and outstanding electrical insulating property, serviceability temperature scope is wide, can within the scope of-100 ~ 150 DEG C, use for a long time, also there is higher hot strength and shock strength and good resistance to water, corrosion resistance, creep resistance, resistance to wear simultaneously.

For solving the problems of the technologies described above, the technical solution used in the present invention is:

A kind of fireproof power cable, include multiple conducting wires, it is characterized in that: described multiple conducting wires is divided into five groups and every group and is coated with respectively five insulation inner cores of insulating barrier formation outward, described five insulation inner cores are coated with ceramic silicon rubber flame retardant coating outward jointly, in described ceramic silicon rubber flame retardant coating, be filled with alkali-free glass fiber cloth, described ceramic silicon rubber flame retardant coating is coated with silicon rubber inner restrictive coating, steel-tape armouring layer and external sheath layer.

External sheath layer material is made up of the raw material of following weight portion: polyphenylene oxide 40-60, polyether-ether-ketone 30-50, microcrystalline wax 3-6, p isopropylbenzoic acid base benzene diphenyl ester 10-15, naphthenic oil 4-8, calcium stearate 1-2, zinc laurate 1-2, dibasic lead phosphite 0.5-1, ammonium octamolybdate 5-10, Firebrake ZB 8-12, talcum powder 10-15, gas-phase silica 15-20, calcining loess 12-18, diisobutyl phthalate 10-15, modified mineral filler 12-18;

The preparation method of described modified mineral filler is as follows: a, take wollastonite, kaolin, pyrophillite, bauxite mix by weight 5-10:3-6:2-4:1, pulverize, cross 200-300 mesh sieve, 650-750 DEG C of calcining 20-30min, naturally cools to room temperature, b, the complex mineral filler of above-mentioned calcination processing is added water to pull an oar and make the suspension that concentration is 35-45%, the hydrochloric acid solution that is 15-20% by concentration regulates PH to 4-5, heating water bath is to 70-80 DEG C, 1500-2000rpm speed lapping 10-15min, then be neutralized to neutrality with the sodium hydroxide solution that concentration is 10-15%, leave standstill 20-30min, filter, distilled water washing 2-3 time for filter residue, after oven dry, add in mixer, under 500-1000rpm high-speed stirred, get the methoxy poly (ethylene glycol) monomethacrylates that is equivalent to complex mineral filler weight 3-5%, the Di(dioctylpyrophosphato) ethylene titanate of 0.5-1%, after mixing, the poly of 2-4% slowly adds in complex mineral filler with vaporific or droplet form, at 40-60 DEG C of temperature, stir 10-20min, dry, the benzoyl peroxide of polystyrene-poly isobutene-polystyrene triblock copolymer of c, the polybutadiene rubber of getting the butyl rubber, the 15-25% that are equivalent to complex mineral filler weight 25-35%, 1.5-2.5%, the tri-thiol 2-ethyl hexyl ethanoate antimony of 2-4%, 1-3%, the complex mineral filler that 5-10% trimesic acid triallyl is processed with step b together drop into double screw extruder after mixing and carry out melt blending, then extruding pelletization, naturally cool to room temperature, be modification complex mineral filler.

The preparation method of external sheath layer material of the present invention, comprises the following steps:

(1) polyphenylene oxide, polyether-ether-ketone are dropped in kneader and mixed, then add p isopropylbenzoic acid base benzene diphenyl ester, diisobutyl phthalate to stir a moment, after plasticizer is by basic absorption, add calcium stearate, zinc laurate, dibasic lead phosphite, make material temperature be raised to 70-80 DEG C by frictional heat, then add remaining raw material, when material temperature rises to 90-110 DEG C, material is discharged in cooling mixing machine and is lowered the temperature, discharging to below 40-50 DEG C time;

(2) above-mentioned kneaded raw material is dropped into extruding pelletization in double screw extruder, screw speed 60-80r/min, processing temperature is 165-195 DEG C;

(3) pack after metering.

Advantage of the present invention is:

Layer of structure of the present invention is simple, but has stronger fire resistance, and does not affect the mechanical performance of power cable entirety.Cable jacket material excellent combination property of the present invention, toughness is high, there is good chemical stability and outstanding electrical insulating property, serviceability temperature scope is wide, can within the scope of-100 ~ 150 DEG C, use for a long time, also there is higher hot strength and shock strength and good resistance to water, corrosion resistance, creep resistance, resistance to wear simultaneously.

brief description of the drawings:

Fig. 1 is structural representation of the present invention.

embodiment:

Referring to Fig. 1, a kind of fireproof power cable, include multiple conducting wires 1, described multiple conducting wires 1 be divided into five groups and every group be coated with respectively outward insulating barrier 2 form five insulation inner cores, described five insulation inner cores are coated with ceramic silicon rubber flame retardant coating 3 outward jointly, in described ceramic silicon rubber flame retardant coating 3, be filled with alkali-free glass fiber cloth 4, described ceramic silicon rubber flame retardant coating 3 is coated with silicon rubber inner restrictive coating 5, steel-tape armouring layer 6 and oversheath 7.

Oversheath 7 materials are made up of the raw material of following weight portion: polyphenylene oxide 50, polyether-ether-ketone 50, microcrystalline wax 4, p isopropylbenzoic acid base benzene diphenyl ester 15, naphthenic oil 6, calcium stearate 1, zinc laurate 1.5, dibasic lead phosphite 1, ammonium octamolybdate 8, Firebrake ZB 10, talcum powder 15, gas-phase silica 18, calcining loess 16, diisobutyl phthalate 12, modified mineral filler 16;

The preparation method of described modified mineral filler is as follows: a, take wollastonite, kaolin, pyrophillite, bauxite mix by weight 8:4:3:1, pulverize, cross 250 mesh sieves, 710 DEG C of calcining 25min, naturally cool to room temperature, b, the complex mineral filler of above-mentioned calcination processing is added water, and to make concentration be 45% suspension in making beating, the hydrochloric acid solution that is 15% by concentration regulates PH to 5, heating water bath to 75 DEG C, 2000rpm speed lapping 10min, then be neutralized to neutrality with the sodium hydroxide solution that concentration is 15%, leave standstill 25min, filter, distilled water washing 2 times for filter residue, after oven dry, add in mixer, under 800rpm high-speed stirred, get the methoxy poly (ethylene glycol) monomethacrylates that is equivalent to complex mineral filler weight 4%, 0.7% Di(dioctylpyrophosphato) ethylene titanate, after mixing, 3% poly slowly adds in complex mineral filler with vaporific or droplet form, at 50 DEG C of temperature, stir 15min, dry, c, get be equivalent to butyl rubber, 20% polybutadiene rubber, polystyrene-poly isobutene-polystyrene triblock copolymer of 2%, 3% tri-thiol 2-ethyl hexyl ethanoate antimony, 2% the benzoyl peroxide of complex mineral filler weight 30%, complex mineral filler that 8% trimesic acid triallyl is processed with step b together drops into double screw extruder after mixing and carries out melt blending, then extruding pelletization, naturally cool to room temperature, be modification complex mineral filler.

The preparation method of oversheath 7 materials, comprises the following steps:

(1) polyphenylene oxide, polyether-ether-ketone are dropped in kneader and mixed, then add p isopropylbenzoic acid base benzene diphenyl ester, diisobutyl phthalate to stir a moment, after plasticizer is by basic absorption, add calcium stearate, zinc laurate, dibasic lead phosphite, make material temperature be raised to 70-80 DEG C by frictional heat, then add remaining raw material, when material temperature rises to 90-110 DEG C, material is discharged in cooling mixing machine and is lowered the temperature, discharging to below 40-50 DEG C time;

(2) above-mentioned kneaded raw material is dropped into extruding pelletization in double screw extruder, screw speed 60-80r/min, processing temperature is 165-195 DEG C;

(3) pack after metering.

The results of property of oversheath 7 materials that make after testing, is as following table:

Claims (3)

1. a fireproof power cable, includes multiple conducting wires, it is characterized in that: described multiple conducting wires is divided into five groups and every group and is coated with respectively outward insulating barrierform five insulation inner cores, described five insulation inner cores are coated with ceramic silicon rubber flame retardant coating outward jointly, in described ceramic silicon rubber flame retardant coating, be filled with alkali-free glass fiber cloth, described ceramic silicon rubber flame retardant coating is coated with silicon rubber inner restrictive coating, steel-tape armouring layer and external sheath layer.

2. fireproof power cable according to claim 1, the external sheath layer material described in it is characterized in that is made up of the raw material of following weight portion: polyphenylene oxide 40-60, polyether-ether-ketone 30-50, microcrystalline wax 3-6, p isopropylbenzoic acid base benzene diphenyl ester 10-15, naphthenic oil 4-8, calcium stearate 1-2, zinc laurate 1-2, dibasic lead phosphite 0.5-1, ammonium octamolybdate 5-10, Firebrake ZB 8-12, talcum powder 10-15, gas-phase silica 15-20, calcining loess 12-18, diisobutyl phthalate 10-15, modified mineral filler 12-18;

The preparation method of described modified mineral filler is as follows: a, take wollastonite, kaolin, pyrophillite, bauxite mix by weight 5-10:3-6:2-4:1, pulverize, cross 200-300 mesh sieve, 650-750 DEG C of calcining 20-30min, naturally cools to room temperature, b, the complex mineral filler of above-mentioned calcination processing is added water to pull an oar and make the suspension that concentration is 35-45%, the hydrochloric acid solution that is 15-20% by concentration regulates PH to 4-5, heating water bath is to 70-80 DEG C, 1500-2000rpm speed lapping 10-15min, then be neutralized to neutrality with the sodium hydroxide solution that concentration is 10-15%, leave standstill 20-30min, filter, distilled water washing 2-3 time for filter residue, after oven dry, add in mixer, under 500-1000rpm high-speed stirred, get the methoxy poly (ethylene glycol) monomethacrylates that is equivalent to complex mineral filler weight 3-5%, the Di(dioctylpyrophosphato) ethylene titanate of 0.5-1%, after mixing, the poly of 2-4% slowly adds in complex mineral filler with vaporific or droplet form, at 40-60 DEG C of temperature, stir 10-20min, dry, the benzoyl peroxide of polystyrene-poly isobutene-polystyrene triblock copolymer of c, the polybutadiene rubber of getting the butyl rubber, the 15-25% that are equivalent to complex mineral filler weight 25-35%, 1.5-2.5%, the tri-thiol 2-ethyl hexyl ethanoate antimony of 2-4%, 1-3%, the complex mineral filler that 5-10% trimesic acid triallyl is processed with step b together drop into double screw extruder after mixing and carry out melt blending, then extruding pelletization, naturally cool to room temperature, be modification complex mineral filler.

3. fireproof power cable according to claim 2, the preparation method of the external sheath layer material described in it is characterized in that, comprises the following steps:

(1) polyphenylene oxide, polyether-ether-ketone are dropped in kneader and mixed, then add p isopropylbenzoic acid base benzene diphenyl ester, diisobutyl phthalate to stir a moment, after plasticizer is by basic absorption, add calcium stearate, zinc laurate, dibasic lead phosphite, make material temperature be raised to 70-80 DEG C by frictional heat, then add remaining raw material, when material temperature rises to 90-110 DEG C, material is discharged in cooling mixing machine and is lowered the temperature, discharging to below 40-50 DEG C time;

(2) above-mentioned kneaded raw material is dropped into extruding pelletization in double screw extruder, screw speed 60-80r/min, processing temperature is 165-195 DEG C;

(3) pack after metering.