CN105161213A - High-performance waterproof and fireproof composite power cable and manufacturing method thereof - Google Patents
High-performance waterproof and fireproof composite power cable and manufacturing method thereof Download PDFInfo
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- CN105161213A CN105161213A CN201510625517.4A CN201510625517A CN105161213A CN 105161213 A CN105161213 A CN 105161213A CN 201510625517 A CN201510625517 A CN 201510625517A CN 105161213 A CN105161213 A CN 105161213A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a high-performance waterproof and fireproof composite power cable, comprising multiple strands of cable cores as well as a first nano flame-retardant insulating layer, a ceramic fiber fireproof belt, a second nano flame-retardant insulating layer and a waterproof outer sheath wrapped outside the multiple strands of cable cores in sequence; each strand of cable core comprises a conductor core set as well as a first organosilicone composite flame-retardant layer and a second organosilicone composite flame-retardant layer wrapped outside the conductor core set in sequence; and a flame-retardant filling material is filled among the multiple strands of cable cores and between the cable core and the second organosilicone composite flame-retardant layer. The fireproof of the cable not only meets the requirement of national standard GB/T 19216, but also can meet the requirements of levels C, W and Z provided in British BS6387 standards; and in the infiltration test process, the cable has high waterproof capability.
Description
Technical field
The present invention relates to field of cable technology, specifically a kind of high performance water proof fire prevention composite power cable and preparation method thereof.
Background technology
Along with developing rapidly of national economy, use amount and the laying dense degree of cable are more and more higher, increased year by year in recent years, and the fire wherein caused due to electric wire reason account for sizable ratio by the fire electrically caused.In a fire, " secondary disaster " that a large amount of smog etc. of the corrosivity discharged because cable plays fire spread and toxic gas, generation cause, cause the attention of people, therefore the requirement of relevant department to cable fire-proof, the characteristic such as fire-retardant is also more and more higher, not only require that cable line has high reliability, and require that it is to the fail safe of surrounding environment.GB50217-94 " Code for design of cables of electric works " is using the important measures adopting flame retardant cable, fire-resisting cable etc. as cable fire-proof, and clear stipulaties should select the fireproof cable of flame retardant cable or other type in some place.
For now, fire-retardant, fire-resistant, low-smoke low-halogen or low smoke halogen-free flame retardant cable are referred to as fireproof cable by cable industry custom.But these products are because of the difference of its performance index, manufacturing technology, and the scope of its application is also different.The after-combustion of not easily catching fire or catch fire of common flame-retardant electric wire and cable is only limited within limits, therefore it can suppress propagation of flame, the fire prevention level of whole piece cable line can be improved, be generally used for the higher spaciousness of cable laying dense degree and draughty place.The main feature of fire-resisting cable is the safe operation that still can keep certain hour in ablaze situation, and during to ensure fire, energising can be continued in fire-fighting, warning system, emergency service loop etc., and disaster relief work is normally carried out.And low-smoke low-halogen, low smoke halogen-free flame retardant cable burn time produce smog and pernicious gas less, the loss that " secondary disaster " brings can be reduced to comparatively low degree, therefore be applicable to require higher subway, tunnel, boats and ships and vehicle, power station and important skyscraper etc.But this several cable is violent in the intensity of a fire, wind-force is powerful, just lose its normal characteristic under high temperature, high-pressure situations and can not meet instructions for use, because they mostly are organic material, easily burn under case of fire, and send a lot of heat, accelerate the burning of cable.
Meanwhile, the same significant of the water resistance of cable.
Summary of the invention
The object of the present invention is to provide a kind of high performance water proof fire prevention composite power cable and preparation method thereof, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A kind of high performance water proof fire prevention composite power cable, comprises Stranded cable inner core and Stranded cable inner core outer coated successively the first nano flame retardant insulating barrier, ceramic fibre fire resistant belt, the second nano flame retardant insulating barrier and waterproof oversheath; Cable inner core described in multiply be centered by one reinforcement of arranging by this cable center position radially, mutual circumscribed tight arrangement between two, per share described cable inner core includes conductor cores group, and the conductor cores group fire-retardant layer of the first organosilicon composite material coated successively and the fire-retardant layer of the second organosilicon composite material outward; At Stranded cable inner core each other, and between cable inner core and the fire-retardant layer of the second organosilicon composite material all flame-retardant filler is filled with;
Described flame-retardant filler according to the component of weight portion is: ethylene-vinyl acetate copolymer 80 parts, micron order kaolin 30-45 part, zinc hydroxyl stannate 10-20 part, nanometer nitrogen-phosphorus expansion fire retardant 1-15 part, eakleite 10-30 part, promoter 1-10 part, plasticizer 0.5-2.5 part, age resistor 2-6 part;
The fire-retardant layer of described first organosilicon composite material is identical with the material of the fire-retardant layer of the second organosilicon composite material, according to the component of weight portion is: polyether modified silicon oil 60-80 part, organic silicon rubber 25-45 part, ferric pyrophosphate 5-15 part, carbon black 30-50 part, steel fibre 5-15 part;
Described first nano flame retardant insulating barrier is identical with the material of described second nano flame retardant insulating barrier, according to the component of weight portion is: water-borne acrylic resin 50-70 part, Lauryl Alcohol ester 15-35 part, powdered whiting 20-35 part, antimonous oxide 1-15 part, nano mesoporous molecular screen 10-20 part, plasticizer 0.5-1.5 part, age resistor 1-4 part;
Described waterproof oversheath according to the component of weight portion is: polyethylene from high pressure process 80-100 part, cellulose ether 1-5 part, alundum (Al2O3) 10-25 part, titanium dioxide 1-5 part, environment-friendly plasticizer 1-10 part, sodium metasilicate 10-20 part, waterproof stabilizer 1-5 part, calcene 1-5 part..
Described ceramic fibre fire resistant belt is bonded by one deck ceramic fibre and one deck steel fibre, and thickness is 0.2-0.4mm, and adjacent layer adopts two-way wrapped mode, every ply place apart windings.
Described reinforcement adopts low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer to make.
As further scheme of the present invention: described flame-retardant filler according to the component of weight portion is: ethylene-vinyl acetate copolymer 80 parts, micron order kaolin 35-45 part, zinc hydroxyl stannate 12-18 part, nanometer nitrogen-phosphorus expansion fire retardant 5-12 part, eakleite 15-25 part, promoter 2-8 part, plasticizer 0.5-1.5 part, age resistor 3-5 part.
As further scheme of the present invention: the fire-retardant layer of described first organosilicon composite material is identical with the material of the fire-retardant layer of the second organosilicon composite material, according to the component of weight portion is: polyether modified silicon oil 65-75 part, organic silicon rubber 30-40 part, ferric pyrophosphate 6-12 part, carbon black 35-45 part, steel fibre 6-12 part.
As further scheme of the present invention: described first nano flame retardant insulating barrier is identical with the material of described second nano flame retardant insulating barrier, according to the component of weight portion is: water-borne acrylic resin 55-65 part, Lauryl Alcohol ester 20-30 part, powdered whiting 25-35 part, antimonous oxide 6-12 part, nano mesoporous molecular screen 12-18 part, plasticizer 0.8-1.2 part, age resistor 2-4 part.
As further scheme of the present invention: described waterproof oversheath according to the component of weight portion is: polyethylene from high pressure process 85-95 part, cellulose ether 2-4 part, alundum (Al2O3) 15-22 part, titanium dioxide 2-4 part, environment-friendly plasticizer 2-8 part, sodium metasilicate 12-18 part, waterproof stabilizer 2-4 part, calcene 2-4 part.
As further scheme of the present invention: described flame-retardant filler according to the component of weight portion is: ethylene-vinyl acetate copolymer 80 parts, micron order kaolin 40 parts, zinc hydroxyl stannate 15 parts, nanometer nitrogen-phosphorus expansion fire retardant 10 parts, eakleite 205 parts, promoter 5 parts, 1 part, plasticizer, 4 parts, age resistor.
As further scheme of the present invention: the fire-retardant layer of described first organosilicon composite material is identical with the material of the fire-retardant layer of the second organosilicon composite material, according to the component of weight portion is: polyether modified silicon oil 70 parts, organic silicon rubber 35 parts, ferric pyrophosphate 10 parts, carbon black 40 parts, steel fibre 10 parts.
As further scheme of the present invention: described first nano flame retardant insulating barrier is identical with the material of described second nano flame retardant insulating barrier, according to the component of weight portion is: water-borne acrylic resin 60 parts, Lauryl Alcohol ester 25 parts, powdered whiting 30 parts, antimonous oxide 10 parts, nano mesoporous molecular screen 15 parts, 1 part, plasticizer, 3 parts, age resistor.
As further scheme of the present invention: described waterproof oversheath according to the component of weight portion is: polyethylene from high pressure process 90 parts, cellulose ether 3 parts, alundum (Al2O3) 20 parts, titanium dioxide 3 parts, environment-friendly plasticizer 5 parts, sodium metasilicate 15 parts, waterproof stabilizer 3 parts, calcene 3 parts.
The manufacture method that the present invention also provides a kind of high performance water proof to prevent fires composite power cable, concrete steps are:
(1) adopt several conductor strand to become a conductor cores group, then adopt double-layer coextrusion technique at conductor cores the group outer fire-retardant layer of coated first organosilicon composite material and the fire-retardant layer of the second organosilicon composite material successively from inside to outside; Namely unit cable inner core is obtained;
(2) several cables inner core is plied to one total cable, and with expressing technique coated flame-retardant filler outside one total cable, then adopts around-packing technology at the first nano flame retardant insulating barrier;
(3) three-layer co-extruded technique is adopted, at the first nano flame retardant insulating barrier outer coating ceramic fibre fire-proof band, the second nano flame retardant insulating barrier and fire-retardant oversheath successively from inside to outside; Namely a kind of high performance water proof fire prevention composite power cable is obtained.
Compared with prior art, the invention has the beneficial effects as follows:
The fire resistance test of a kind of high performance water proof fire prevention composite power cable of the present invention's design not only meets the requirement of GB GB/T19216, apply 1000V voltage between the conductors, be the 3h that burns in the flame of 950-1000 DEG C in flame temperature, cable neither short circuit is not also opened a way.Also can meet the requirement of A level, B level and the C level specified in Britain BS6387 standard, meanwhile, in burning, also can tolerate Water spray (W level) impact (X level, Y level, Z level) with resistance to mechanical; In process of the test, cable neither short circuit is not also opened a way.
The fire-retardant category-A of this cable fulfils, be fire-retardant highest level, namely anti-flammability in order to extinguish, reducing or suppress the burning of material, adds fire retardant usually in the material, makes material have the performance stoping or delay propagation of flame when burning.When burning things which may cause a fire disaster disappears outside, through can certainly put out after a while.For reaching fire-retardant category-A requirement; in structural design; adopt the materials such as glass fibre fire resistant belt, fire-retardant oversheath and the fire-retardant layer of organosilicon composite material, flame retardant insulation and flame-retardant filler to carry out multiple protective, the comprehensive mechanical of product is formed and significantly improves.
Meanwhile, this cable, through infiltration experiment, possesses the waterproof ability of higher level.
Accompanying drawing explanation
Fig. 1 is profile of the present invention.
Wherein: 1, cable inner core; 11, conductor cores group; 12, the fire-retardant layer of the first organosilicon composite material; 13, the fire-retardant layer of the second organosilicon composite material; 2, flame-retardant filler; 3, the first nano flame retardant insulating barrier; 4, glass fibre fire resistant belt; 5, the second nano flame retardant insulating barrier; 6, fire-retardant oversheath; 7, reinforcement.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Refer to Fig. 1, a kind of high performance water proof fire prevention composite power cable, comprise Stranded cable inner core and Stranded cable inner core outer coated successively the first nano flame retardant insulating barrier, ceramic fibre fire resistant belt, the second nano flame retardant insulating barrier and waterproof oversheath; Cable inner core described in multiply be centered by one reinforcement 7 of arranging by this cable center position radially, mutual circumscribed tight arrangement between two, per share described cable inner core includes conductor cores group, and the conductor cores group fire-retardant layer of the first organosilicon composite material coated successively and the fire-retardant layer of the second organosilicon composite material outward; At Stranded cable inner core each other, and between cable inner core and the fire-retardant layer of the second organosilicon composite material all flame-retardant filler is filled with;
In the present invention, described flame-retardant filler according to the component of weight portion is: ethylene-vinyl acetate copolymer 80 parts, micron order kaolin 30-45 part, zinc hydroxyl stannate 10-20 part, nanometer nitrogen-phosphorus expansion fire retardant 1-15 part, eakleite 10-30 part, promoter 1-10 part, plasticizer 0.5-2.5 part, age resistor 2-6 part; This flame-retardant filler 2, keep soft loose powder shape at normal temperatures, ensure that finished cable in use flexible, the first wrapped outside at flame-retardant filler 2 of nano flame retardant insulating barrier 3, first nano flame retardant insulating barrier 3 has fire insulation and fire-retardant performance, and the flame-retardant filler 2 at normal temperatures in powder ball shape can be wrapped by it; And when running into fire, flame-retardant filler 2 can be formed has heat insulation, fireproof earthenware, cable inner core 1 can be worked safely, thus cable is met to bear under load 1000V condition of work the burning of 950 DEG C, 3 hours, there is anti-spray simultaneously, function that resistance to mechanical is clashed into.
In the present invention, the fire-retardant layer of described first organosilicon composite material is identical with the material of the fire-retardant layer of the second organosilicon composite material, according to the component of weight portion is: polyether modified silicon oil 60-80 part, organic silicon rubber 25-45 part, ferric pyrophosphate 5-15 part, carbon black 30-50 part, steel fibre 5-15 part;
In the present invention, described first nano flame retardant insulating barrier is identical with the material of described second nano flame retardant insulating barrier, according to the component of weight portion is: water-borne acrylic resin 50-70 part, Lauryl Alcohol ester 15-35 part, powdered whiting 20-35 part, antimonous oxide 1-15 part, nano mesoporous molecular screen 10-20 part, plasticizer 0.5-1.5 part, age resistor 1-4 part;
In the present invention, described waterproof oversheath according to the component of weight portion is: polyethylene from high pressure process 80-100 part, cellulose ether 1-5 part, alundum (Al2O3) 10-25 part, titanium dioxide 1-5 part, environment-friendly plasticizer 1-10 part, sodium metasilicate 10-20 part, waterproof stabilizer 1-5 part, calcene 1-5 part..
In the present invention, described reinforcement adopts low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer to make.
In the present invention, described ceramic fibre fire resistant belt is bonded by one deck ceramic fibre and one deck steel fibre, and thickness is 0.2-0.4mm, and adjacent layer adopts two-way wrapped mode, every ply place apart windings.This material-70 DEG C-210 DEG C time softness, flexible, intensity is high, mechanicalness insulating properties is excellent.Make cable have the features such as softness, sound insulation, shock resistance, construction is laid convenient.
Embodiment 1
A manufacture method for high performance water proof fire prevention composite power cable, concrete steps are:
(1) adopt several conductor strand to become a conductor cores group 11, then adopt double-layer coextrusion technique at conductor cores the group 11 outer fire-retardant layer of coated first organosilicon composite material 12 and the fire-retardant layer 13 of the second organosilicon composite material successively from inside to outside; Namely unit cable inner core 1 is obtained;
(2) centered by one reinforcement 7 several cables inner core 1 arranged by this cable center position radially, mutual circumscribed tight arrangement is between two plied to one total cable, and with expressing technique coated flame-retardant filler 2 outside one total cable, then adopt around-packing technology at the first nano flame retardant insulating barrier 3;
(3) three-layer co-extruded technique is adopted, at the first nano flame retardant insulating barrier 3 outer coating ceramic fibre fire-proof band 4, second nano flame retardant insulating barrier 5 and fire-retardant oversheath 6 successively from inside to outside; Namely a kind of high performance water proof fire prevention composite power cable is obtained.
Wherein, described flame-retardant filler 2 according to the component of weight portion is: ethylene-vinyl acetate copolymer 80 parts, micron order kaolin 40 parts, zinc hydroxyl stannate 15 parts, nanometer nitrogen-phosphorus expansion fire retardant 10 parts, eakleite 205 parts, promoter 5 parts, 1 part, plasticizer, 4 parts, age resistor.The fire-retardant layer of described first organosilicon composite material 12 is identical with the material of the fire-retardant layer of the second organosilicon composite material 13, according to the component of weight portion is: polyether modified silicon oil 70 parts, organic silicon rubber 35 parts, ferric pyrophosphate 10 parts, carbon black 40 parts, steel fibre 10 parts.Described first nano flame retardant insulating barrier 3 is identical with the material of described second nano flame retardant insulating barrier 5, according to the component of weight portion is: water-borne acrylic resin 60 parts, Lauryl Alcohol ester 25 parts, powdered whiting 30 parts, antimonous oxide 10 parts, nano mesoporous molecular screen 15 parts, 1 part, plasticizer, 3 parts, age resistor.Described waterproof oversheath 6 according to the component of weight portion is: polyethylene from high pressure process 90 parts, cellulose ether 3 parts, alundum (Al2O3) 20 parts, titanium dioxide 3 parts, environment-friendly plasticizer 5 parts, sodium metasilicate 15 parts, waterproof stabilizer 3 parts, calcene 3 parts.
Fire prevention experiment:
1. the examining report that a kind of high performance water proof fire prevention composite power cable that prepared by pair above-described embodiment carries out special experiment is taken passages as follows:
2. pair this product carry out type approval test examining report take passages as follows:
Visible, the fire resistance test of a kind of high performance water proof fire prevention composite power cable of the present invention's design not only meets the requirement of GB GB/T19216, apply 1000V voltage between the conductors, be the 3h that burns in the flame of 950-1000 DEG C in flame temperature, cable neither short circuit is not also opened a way.Also can meet the requirement of A level, B level and the C level specified in Britain BS6387 standard, meanwhile, in burning, also can tolerate Water spray (W level) impact (X level, Y level, Z level) with resistance to mechanical; In process of the test, cable neither short circuit is not also opened a way.
The fire-retardant category-A of this cable fulfils, be fire-retardant highest level, namely anti-flammability in order to extinguish, reducing or suppress the burning of material, adds fire retardant usually in the material, makes material have the performance stoping or delay propagation of flame when burning.When burning things which may cause a fire disaster disappears outside, through can certainly put out after a while.For reaching fire-retardant category-A requirement; in structural design; adopt the materials such as glass fibre fire resistant belt, fire-retardant oversheath and the fire-retardant layer of homemade organosilicon composite material, nano flame retardant insulating barrier and flame-retardant filler to carry out multiple protective, the comprehensive mechanical of product is formed and significantly improves.
Water permeabillity test
One, sample preparation
By cable sample prepared by the embodiment 1 that a section was not done any electrical performance test to the youthful and the elderly 6m, be carried out in accordance with regulations bend test, but do not carry out the partial discharge test of adding.From at the cable extracting a segment length 3m after bend test and at the cable of horizontal positioned.The wide annulus of an about 50cm is opened at position therebetween.Peel off the outside all sheaths of insulation shielding in ring.Annulus should cut make associated gap be easy to be exposed in water, if cable only has conductor stop water, and cutting surfaces that so must be relevant with suitable material seal, or all coating layers divesting outside.With a suitable device, the pipe that a diameter is at least 10m is vertically placed in above the annulus of incision, and seals mutually with the surface of cable jacket.Export this device at cable seal and should not produce mechanical stress on cable.Note: some block water barrier to longitudinal thoroughly water mitigation may with some compositions in water about (pH value and ion concentration as water) unless otherwise prescribed, ordinary tap water should be adopted to do experiment
Two, content of the test
In 5min, by temperature be (20 ± 10 DEG C) water ascending pipe in, make pipe middle water level higher than cable center 1m.Sample should place this state 24h.Then 10 heat cycles are carried out to sample, adopt conductor electrified regulation method, make conductor temperature exceed when cable normally runs more than conductor maximum temperature 5-10 DEG C, but can not more than 100 DEG C.Heat at least 24h, each heating cycle inner wire keep more than 2h heating time.Then naturally cool more than 16h, head keeps 1m.
Three, experimental result:
During experiment 24h, there is not infiltration in these sample of cable two ends.
Comparative example 1
A manufacture method for high performance water proof fire prevention composite power cable, concrete steps are:
(1) adopt several conductor strand to become a conductor cores group 11, then adopt double-layer coextrusion technique at conductor cores the group 11 outer fire-retardant layer of coated first organosilicon composite material 12 and the fire-retardant layer 13 of the second organosilicon composite material successively from inside to outside; Namely unit cable inner core 1 is obtained;
(2) centered by one reinforcement 7 several cables inner core 1 arranged by this cable center position radially, mutual circumscribed tight arrangement is between two plied to one total cable, and with expressing technique coated first nano flame retardant insulating barrier 3 outside one total cable;
(3) three-layer co-extruded technique is adopted, at the first nano flame retardant insulating barrier 3 outer coating ceramic fibre fire-proof band 4, second nano flame retardant insulating barrier 5 and fire-retardant oversheath 6 successively from inside to outside; Namely a kind of high performance water proof fire prevention composite power cable is obtained.
Wherein, the fire-retardant layer of described first organosilicon composite material 12 is identical with the material of the fire-retardant layer of the second organosilicon composite material 13, according to the component of weight portion is: polyether modified silicon oil 70 parts, organic silicon rubber 35 parts, ferric pyrophosphate 10 parts, carbon black 40 parts, steel fibre 10 parts.Described first nano flame retardant insulating barrier 3 is identical with the material of described second nano flame retardant insulating barrier 5, according to the component of weight portion is: water-borne acrylic resin 60 parts, Lauryl Alcohol ester 25 parts, powdered whiting 30 parts, antimonous oxide 10 parts, nano mesoporous molecular screen 15 parts, 1 part, plasticizer, 3 parts, age resistor.Described waterproof oversheath 6 according to the component of weight portion is: polyethylene from high pressure process 90 parts, cellulose ether 3 parts, alundum (Al2O3) 20 parts, titanium dioxide 3 parts, environment-friendly plasticizer 5 parts, sodium metasilicate 15 parts, waterproof stabilizer 3 parts, calcene 3 parts.
Fire prevention experiment:
1. the examining report that a kind of high performance water proof fire prevention composite power cable that prepared by pair above-described embodiment carries out special experiment is taken passages as follows:
2. pair this product carry out type approval test examining report take passages as follows:
Comparative example 2
A manufacture method for high performance water proof fire prevention composite power cable, concrete steps are:
(1) adopt several conductor strand to become a conductor cores group 11, then adopt double-layer coextrusion technique at conductor cores the group 11 outer fire-retardant layer of coated first organosilicon composite material 12 and the fire-retardant layer 13 of the second organosilicon composite material successively from inside to outside; Namely unit cable inner core 1 is obtained;
(2) centered by one reinforcement 7 several cables inner core 1 arranged by this cable center position radially, mutual circumscribed tight arrangement is between two plied to one total cable, and with expressing technique coated flame-retardant filler 2 outside one total cable, then adopt around-packing technology at the first nano flame retardant insulating barrier 3 outer coating ceramic fibre fire-proof band 4 and the second nano flame retardant insulating barrier successively from inside to outside; Namely a kind of high performance water proof fire prevention composite power cable is obtained.
Wherein, described flame-retardant filler 2 according to the component of weight portion is: ethylene-vinyl acetate copolymer 80 parts, micron order kaolin 40 parts, zinc hydroxyl stannate 15 parts, nanometer nitrogen-phosphorus expansion fire retardant 10 parts, eakleite 205 parts, promoter 5 parts, 1 part, plasticizer, 4 parts, age resistor.The fire-retardant layer of described first organosilicon composite material 12 is identical with the material of the fire-retardant layer of the second organosilicon composite material 13, according to the component of weight portion is: polyether modified silicon oil 70 parts, organic silicon rubber 35 parts, ferric pyrophosphate 10 parts, carbon black 40 parts, steel fibre 10 parts.Described first nano flame retardant insulating barrier 3 is identical with the material of described second nano flame retardant insulating barrier 5, according to the component of weight portion is: water-borne acrylic resin 60 parts, Lauryl Alcohol ester 25 parts, powdered whiting 30 parts, antimonous oxide 10 parts, nano mesoporous molecular screen 15 parts, 1 part, plasticizer, 3 parts, age resistor.
Water permeabillity test
One, sample preparation
By cable sample prepared by the comparative example 2 that a section was not done any electrical performance test to the youthful and the elderly 6m, be carried out in accordance with regulations bend test, but do not carry out the partial discharge test of adding.From at the cable extracting a segment length 3m after bend test and at the cable of horizontal positioned.The wide annulus of an about 50cm is opened at position therebetween.Peel off the outside all sheaths of insulation shielding in ring.Annulus should cut make associated gap be easy to be exposed in water, if cable only has conductor stop water, and cutting surfaces that so must be relevant with suitable material seal, or all coating layers divesting outside.With a suitable device, the pipe that a diameter is at least 10m is vertically placed in above the annulus of incision, and seals mutually with the surface of cable jacket.Export this device at cable seal and should not produce mechanical stress on cable.Note: some block water barrier to longitudinal thoroughly water mitigation may with some compositions in water about (pH value and ion concentration as water) unless otherwise prescribed, ordinary tap water should be adopted to do experiment
Two, content of the test
In 5min, by temperature be (20 ± 10 DEG C) water ascending pipe in, make pipe middle water level higher than cable center 1m.Sample should place this state 24h.Then 10 heat cycles are carried out to sample, adopt conductor electrified regulation method, make conductor temperature exceed when cable normally runs more than conductor maximum temperature 5-10 DEG C, but can not more than 100 DEG C.Heat at least 24h, each heating cycle inner wire keep more than 2h heating time.Then naturally cool more than 16h, head keeps 1m.
Three, experimental result:
During experiment 15.8h, there is infiltration in these sample of cable two ends.
Visible, flame-retardant filler has good fire prevention, resistance to mechanical impact effect; Waterproof oversheath has higher water resistance; The composite action of the fire-retardant layer of organosilicon composite material and nano flame retardant insulating barrier has good flameproof effect.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned execution mode, in the ken that one skilled in the relevant art possesses, can also makes a variety of changes under the prerequisite not departing from this patent aim.
Claims (10)
1. a high performance water proof fire prevention composite power cable, is characterized in that, comprises Stranded cable inner core and Stranded cable inner core outer coated successively the first nano flame retardant insulating barrier, ceramic fibre fire resistant belt, the second nano flame retardant insulating barrier and waterproof oversheath; Cable inner core described in multiply be centered by one reinforcement of arranging by this cable center position radially, mutual circumscribed tight arrangement between two, per share described cable inner core includes conductor cores group, and the conductor cores group fire-retardant layer of the first organosilicon composite material coated successively and the fire-retardant layer of the second organosilicon composite material outward; At Stranded cable inner core each other, and between cable inner core and the fire-retardant layer of the second organosilicon composite material all flame-retardant filler is filled with;
Described flame-retardant filler according to the component of weight portion is: ethylene-vinyl acetate copolymer 80 parts, micron order kaolin 30-45 part, zinc hydroxyl stannate 10-20 part, nanometer nitrogen-phosphorus expansion fire retardant 1-15 part, eakleite 10-30 part, promoter 1-10 part, plasticizer 0.5-2.5 part, age resistor 2-6 part;
The fire-retardant layer of described first organosilicon composite material is identical with the material of the fire-retardant layer of the second organosilicon composite material, according to the component of weight portion is: polyether modified silicon oil 60-80 part, organic silicon rubber 25-45 part, ferric pyrophosphate 5-15 part, carbon black 30-50 part, steel fibre 5-15 part;
Described first nano flame retardant insulating barrier is identical with the material of described second nano flame retardant insulating barrier, according to the component of weight portion is: water-borne acrylic resin 50-70 part, Lauryl Alcohol ester 15-35 part, powdered whiting 20-35 part, antimonous oxide 1-15 part, nano mesoporous molecular screen 10-20 part, plasticizer 0.5-1.5 part, age resistor 1-4 part;
Described waterproof oversheath according to the component of weight portion is: polyethylene from high pressure process 80-100 part, cellulose ether 1-5 part, alundum (Al2O3) 10-25 part, titanium dioxide 1-5 part, environment-friendly plasticizer 1-10 part, sodium metasilicate 10-20 part, waterproof stabilizer 1-5 part, calcene 1-5 part;
Described ceramic fibre fire resistant belt is bonded by one deck ceramic fibre and one deck steel fibre, and thickness is 0.2-0.4mm, and adjacent layer adopts two-way wrapped mode, every ply place apart windings;
Described reinforcement adopts low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer to make.
2. a kind of high performance water proof fire prevention composite power cable according to claim 1, it is characterized in that, described flame-retardant filler according to the component of weight portion is: ethylene-vinyl acetate copolymer 80 parts, micron order kaolin 35-45 part, zinc hydroxyl stannate 12-18 part, nanometer nitrogen-phosphorus expansion fire retardant 5-12 part, eakleite 15-25 part, promoter 2-8 part, plasticizer 0.5-1.5 part, age resistor 3-5 part.
3. a kind of high performance water proof fire prevention composite power cable according to claim 1, it is characterized in that, the fire-retardant layer of described first organosilicon composite material is identical with the material of the fire-retardant layer of the second organosilicon composite material, according to the component of weight portion is: polyether modified silicon oil 65-75 part, organic silicon rubber 30-40 part, ferric pyrophosphate 6-12 part, carbon black 35-45 part, steel fibre 6-12 part.
4. a kind of high performance water proof fire prevention composite power cable according to claim 1, it is characterized in that, described first nano flame retardant insulating barrier is identical with the material of described second nano flame retardant insulating barrier, according to the component of weight portion is: water-borne acrylic resin 55-65 part, Lauryl Alcohol ester 20-30 part, powdered whiting 25-35 part, antimonous oxide 6-12 part, nano mesoporous molecular screen 12-18 part, plasticizer 0.8-1.2 part, age resistor 2-4 part.
5. a kind of high performance water proof fire prevention composite power cable according to claim 1, it is characterized in that, described waterproof oversheath according to the component of weight portion is: polyethylene from high pressure process 85-95 part, cellulose ether 2-4 part, alundum (Al2O3) 15-22 part, titanium dioxide 2-4 part, environment-friendly plasticizer 2-8 part, sodium metasilicate 12-18 part, waterproof stabilizer 2-4 part, calcene 2-4 part.
6. according to a kind of high performance water proof fire prevention composite power cable one of claim 1-5 Suo Shu, it is characterized in that, described flame-retardant filler according to the component of weight portion is: ethylene-vinyl acetate copolymer 80 parts, micron order kaolin 40 parts, zinc hydroxyl stannate 15 parts, nanometer nitrogen-phosphorus expansion fire retardant 10 parts, eakleite 205 parts, promoter 5 parts, 1 part, plasticizer, 4 parts, age resistor.
7. according to a kind of high performance water proof fire prevention composite power cable one of claim 1-5 Suo Shu, it is characterized in that, the fire-retardant layer of described first organosilicon composite material is identical with the material of the fire-retardant layer of the second organosilicon composite material, according to the component of weight portion is: polyether modified silicon oil 70 parts, organic silicon rubber 35 parts, ferric pyrophosphate 10 parts, carbon black 40 parts, steel fibre 10 parts.
8. according to a kind of high performance water proof fire prevention composite power cable one of claim 1-5 Suo Shu, it is characterized in that, described first nano flame retardant insulating barrier is identical with the material of described second nano flame retardant insulating barrier, according to the component of weight portion is: water-borne acrylic resin 60 parts, Lauryl Alcohol ester 25 parts, powdered whiting 30 parts, antimonous oxide 10 parts, nano mesoporous molecular screen 15 parts, 1 part, plasticizer, 3 parts, age resistor.
9. according to a kind of high performance water proof fire prevention composite power cable one of claim 1-5 Suo Shu, it is characterized in that, described waterproof oversheath according to the component of weight portion is: polyethylene from high pressure process 90 parts, cellulose ether 3 parts, alundum (Al2O3) 20 parts, titanium dioxide 3 parts, environment-friendly plasticizer 5 parts, sodium metasilicate 15 parts, waterproof stabilizer 3 parts, calcene 3 parts.
10. a manufacture method for a kind of high performance water proof fire prevention composite power cable as described in one of claim 1-9, concrete steps are:
(1) adopt several conductor strand to become a conductor cores group, then adopt double-layer coextrusion technique at conductor cores the group outer fire-retardant layer of coated first organosilicon composite material and the fire-retardant layer of the second organosilicon composite material successively from inside to outside; Namely unit cable inner core is obtained;
(2) several cables inner core is plied to one total cable, and with expressing technique coated flame-retardant filler outside one total cable, then adopts around-packing technology at the first nano flame retardant insulating barrier;
(3) three-layer co-extruded technique is adopted, at the first nano flame retardant insulating barrier outer coating ceramic fibre fire-proof band, the second nano flame retardant insulating barrier and fire-retardant oversheath successively from inside to outside; Namely a kind of high performance water proof fire prevention composite power cable is obtained.
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