CN102820078A - Rubber and plastic insulation ceramic fire-resistant cable - Google Patents
Rubber and plastic insulation ceramic fire-resistant cable Download PDFInfo
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- CN102820078A CN102820078A CN2011101517308A CN201110151730A CN102820078A CN 102820078 A CN102820078 A CN 102820078A CN 2011101517308 A CN2011101517308 A CN 2011101517308A CN 201110151730 A CN201110151730 A CN 201110151730A CN 102820078 A CN102820078 A CN 102820078A
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Abstract
The invention relates to a rubber and plastic insulation ceramic fire-resistant cable. The cable is mainly technically characterized in that the high-temperature sintering principle of ceramic products is used for being appropriately applied to the technical field of fire-resistant cables, and a stainless steel corrugated steel tube sheath substitutes for a traditional copper tube sheath. The melting point of stainless steel is about at the temperature of 1500 DEG C, the melting point of copper is at the temperature of 1083 DEG C, and the temperature difference between the melting points of the stainless steel and the copper is 400 DEG C. According to current national standard GB/T 12666.6 provisions, cables are bound to withstand the flame temperature of 950-1000 DEG C and can be fired for 90 minutes without being damaged. The provisions are possibly limited by the temperature of the melting point of the copper in the fire-resistant cable with the copper tube sheath. According to experimental determination, the highest temperature is about 1100-1200 DEG C when a wooden house is in fire, the highest temperature can reach to 1340 DEG C sometimes, and both the highest temperatures exceed the temperature of the melting point of the copper. However, the stainless steel corrugated steel tube sheath can withstand the flame temperature completely.
Description
1 technical field:
This patent relates to the fire-resisting cable in the cable technology field, and its fire-resistant principle, the construction of cable are made significant improvement.Fire-resisting cable is limit because of the melting temperature that receives the copper pipe sheath at present, and its highest refractory temperature is 1000 ℃.The highest refractory temperature of fire-resisting cable of this patent is about 1400 ℃, and cable is when receiving the thermal-flame calcination, not can fire burns, can not discharge any smog and pernicious gas.
Fire-resisting cable is meant: when cable suffers under the thermal-flame calcination condition, cable still can keep the normal operation of certain hour.Therefore fire-resisting cable mainly is applicable to: important power supply, control and the signal line in skyscraper, hotel, subway, tunnel, theater or the like place, such as: automatic fire alarm system; Fire hydrant pump, spray pump system; Flue gas emission; The fire resistance rolling shutter door distribution line; The Fire lift distribution line; The fire disaster emergency illuminating line; Fire broadcast, communication and other power supplies that in fire, must guarantee,, distribution line such as control and signal.
2. background technology:
In 19 end of the centurys, Switzerland engineer Arnold Francis Borel proposes " copper core magnesia insulated copper is managed and protected the cover fire-resisting cable ", claims again " mineral insulated cable ".In the period of 1934--1936, just put into production successively in states such as method, English, be separated by therebetween approximately for 40 years, tracing it to its cause is mainly: product structure is special, and non-cable factory adopts existing equipment to produce; Product processes is complicated; Can not produce single longer cable, cause the circuit link head more, not only time-consuming but also increase cable fault hidden danger; The very easy moisture absorption of magnesia insulation causes insulating performance of cable to reduce; Cable adopts the copper pipe sheath, and not only product cost is high but also the not flexible laying installation difficulty that makes; Copper is the more active metal of chemical property, with the moisture and carbon dioxide effect that lay in the environment under, can produce the corrosion thing verdigris (basic copper carbonate).What more be worth concern is: the fusing point of copper is 1083 ℃; And claim according to " security against fire technology " book: through measuring; Maximum temperature during the log cabin breaking out of fire generally is about 1100--1200 ℃, and maximum temperature can reach 1340 ℃ of fusing points that far surpass the copper pipe sheath sometimes.Therefore can think that there are problems in this fire-resisting cable, but not see have better fire-resisting cable to come out so far as yet, so domestic still in production and sales.
3. summary of the invention:
3.1 ancient times, the ancestor grasped the production technology of pottery before thousands of year.Potter's clay, kaolin, china clay, silicon dioxide are mixed and stirred into the mud shape with water; It is made various vessel, be placed on then in the stove, the burn wood heating makes kiln temperature progressively be increased to sintering temperature; Through insulation, cooling, take out scleroid ceramic product again up to the cooling back.
The main chemical of above potter's clay, kaolin, china clay all is silicon dioxide and alundum (Al, and its fusing point is all more than 1700 ℃.In order to reduce the sintering temperature of pottery, can add an amount of low melting point sintered ceramic powder, about 520 ℃ of its softening temperature, about 600 ℃ of sintering temperature, about 650 ℃ of fusion temperature.This patent system is applied to above-mentioned ceramic post sintering principle in the insulating material of fire-resisting cable and goes; When requiring fire-resisting cable to suffer the thermal-flame calcination; The materials such as potter's clay that contained in its insulating barrier receive high temperature and produce ceramic post sintering and react; Make insulating barrier form the hard potteryization insulator of quality, thereby make fire-resisting cable still keep normal operation.
On the other hand; Rubber in the cable insulation material and LDPE receive high temperature and decomposite multiple fuel gas; Such as: ethene, propylene, isoprene, isobutene, butadiene, styrene; These gases can be absorbed by molecular sieve mostly, and in filling very solid glass fiber environment, under the condition of anoxic, the flames of anger, also are difficult to again burn.
3.2 the stainless steel corrugated metalpipe sheath of cable:
Stainless fusing point is everlasting more than 1500 ℃; Than high about about 400 ℃ of the fusing point of copper; Therefore adopt the fire-resisting cable of stainless steel corrugated metalpipe sheath, its highest refractory temperature can reach about 1400 ℃, and this is to a very important breakthrough of important technology index of fire-resisting cable.
Present stainless use is increasingly extensive, and its one of the main reasons is progressively to dwindle with the price variance of mild steel.Model 410,420,440 stainless steel book steel bands so that this patent was adopted are example, and its price only exceeds about about one times than the thin steel band of mild steel, in addition stainless steel has its unique technique advantage, and non-mild steel can substitute.
4. when embodiment cable in fire receives the thermal-flame calcination, make insulating barrier can produce the potteryization reaction, the following proprietary formula of ad hoc for this reason meter:
4.1 rubber-covered potteryization prescription: weight portion
Ethylene propylene diene rubber (containing natural rubber, butyl rubber, butadiene-styrene rubber, butadiene rubber)-----100
Zinc oxide-----------------------------------------------------15
Potter's clay powder (containing kaolin powder, china clay in powder, silicon dioxide powder)---------------------150--320
Low melting point sintered ceramic powder-------------------------------------------11--38
Silicate or aluminium silicate salt molecular sieve-------------------------------------3--10
Stearic acid-----------------------------------------------------6
Antioxidant MB---------------------------------------------------3.5
Crosslink agent DCP--------------------------------------------------4.5
The sizing material calendering process is (mixing in φ 400 * 1000mm mill; Per car 30Kg): (1) transfers to 60--70 ℃ with the roller temperature; Roll spacing 5--6mm drops into mill to the rubber of mastication, drops into zinc oxide, stearic acid, molecular sieve, antioxidant MB, crosslink agent DCP after waiting to wrap roller.(2) after additive is all sneaked in the rubber, the adjustment roll spacing with thin logical 10 times of sizing material clot, and then is played the triangle bag 10 times to 2--3mm.(3) the adjustment roll spacing is to 5--6MM, treat sizing material bag roller after, potter's clay powder, low melting point sintered ceramic powder are dropped in the sizing material.(4) treat that all additives are all sneaked in the sizing material after, roll spacing is adjusted to 2--3mm, with thin logical 10 times of sizing material clot, and then plays the triangle bag 10 times.Last sizing material slice is cooled to room temperature, supplies operation use down.
4.2 rubber and plastic blend glue insulating ceramics prescription: weight portion
Ethylene propylene diene rubber (containing natural rubber, butyl rubber, butadiene-styrene rubber, butadiene rubber)----60
LDPE------------------------------------------40
Potter's clay powder (containing kaolin powder, china clay in powder, silicon dioxide powder)--------------------160--330
Low melting point sintered ceramic powder------------------------------------------15--50
Silicate or al silicate molecular sieve--------------------------------------3--10
Zinc oxide----------------------------------------------------9
Stearic acid----------------------------------------------------3.5
Antioxidant MB--------------------------------------------------2
Antioxidant 1010------------------------------------------------0.3
Crosslink agent DCP-------------------------------------------------4.5
The sizing material technology (mixing in φ 400 * 1000mm mill, per car 30Kg) of mixing: (1) transfers to 120--130 ℃ with the roller temperature, roll spacing 2--3mm; LDPE is dropped into mill; After treating plastic molting bag roller, drop into mill to the rubber of mastication, after plastics and compounding rubber are integral; With thin logical 10 times of sizing material clot, and then play the triangle bag 10 times.(2) the adjustment roll spacing is to 5--6mm, and the roller temperature transfers to 60--70 ℃.The blended rubber that will be cooled to then below 50 ℃ drops into mill; Treat behind the sizing material bag roller zinc oxide, stearic acid, molecular sieve, antioxidant MB, antioxidant 1010, crosslink agent DCP, potter's clay powder, low melting point sintered ceramic powder to be dropped into mill, all additives are all sneaked in the sizing material.(3) roll spacing is transferred to 2--3mm,, and then play the triangle bag 12 times thin logical 12 times of sizing material clot.(4) the last about 5--6mm of sizing material slice thickness supplies operation use down after being placed on indoor natural cooling.
4.3 the processing of insulated wire cores:
More than the mixing materials of two prescriptions all can adopt cold feeding, be the insulating barrier that extrudes cable on the 16--20 rubber continuous vulcanization extruder doubly at screw slenderness ratio.Use the saturated high pressure steam baking, temperature is controlled at 190--205 ℃.
For the electric strength and the mechanical performance of reinforced insulation core, on every insulated core, adopt alkali-free glass fibre band eclipsed form wrapped two-layer.
4.4 the stranding of cable insulation core:
After the insulated wire cores of cable is processed; Multicore cable all needs through the stranding operation technological requirement of insulated wire cores by regulation to be twisted together; Then on 6 layers on the wrapped alkali-free glass fibre band of its surperficial eclipsed form; As the fire-resistant reinforced layer of cable, also be the necessary refractory block lining of stainless steel corrugated metalpipe sheath.Simultaneously, all spaces application alkali-free glass fibres between insulated wire cores are tried one's best and are filled up solidly, and residual air is reduced to minimum degree.
4.5 stainless steel corrugated metalpipe sheath:
Stainless kind is a lot, and its price differs bigger.The specification requirement of product according to the present invention, should select that good welding performance, steel band elongation are big for use, specific insulation than mild-carbon steel strip little and its price lower kind in stainless steel.For example: model is 410,420,440 stainless steels, and these all are to have ferromagnetic stainless steel, is suitable as the corrugated metalpipe sheath of fire-resisting cable.
4.6 the production range of cable:
4.6.1 5 cores and following power cable, its specified power frequency ac voltage U
o/ U is 600/1000V, and conductive copper wire core nominal cross is 4--300mm
2
4.6.2 37 cores and following control and signal cable, its specified power frequency ac voltage U
o/ U is 450/750V, and conductive copper wire core nominal cross is 2.5--6mm
2。
The construction of cable please see Figure of description for details:
Fig. 1: rubber, mould the insulating ceramics fire-resisting cable
1--conductive copper wire core 2--insulating barrier
3--alkali-free glass fibre band 4--alkali-free glass fibre filler
5--alkali-free glass fibre band 6--stainless steel corrugated metalpipe sheath
Fig. 2: copper core magnesia insulated copper is managed and protected the cover fire-resisting cable:
The insulation of 1--conductive copper wire core 2--magnesia
3--copper pipe sheath
Annotate: Fig. 2 is as the comparison of two kinds of different fire-resisting cable structures, and is only for reference.
Claims (3)
- Rubber, mould the insulating ceramics fire-resisting cable1. in ethylene propylene diene rubber (containing natural rubber, butyl rubber, butadiene-styrene rubber, butadiene rubber), add heavy dose of material that contains silicon dioxide and alundum (Al, comprising: potter's clay powder, kaolin powder, china clay in powder, silicon dioxide powder; Add simultaneously an amount of low melting point sintered ceramic powder again.
- 2. at rubber (containing ethylene propylene diene rubber, natural rubber, butyl rubber, butadiene-styrene rubber, butadiene rubber) and LDPE mutually in the sizing material of blend; Add heavy dose of material that contains silicon dioxide and alundum (Al, comprising: potter's clay powder, kaolin powder, china clay in powder, silicon dioxide powder; Add simultaneously an amount of low melting point sintered ceramic powder again.
- 3. adopt the Thin Stainless Steel steel band; Along cable vertically and the cable pulling speed synchronization pass through moulding mould special; Make steel band form the garden shape steel pipe that is complementary with cable dimension; With the argon arc welding procedure steel pipe is welded into the steel pipe of sealing again,, garden shape steel pipe is rolled into wrinkle and becomes the stainless steel corrugated metalpipe sheath of cable then through embossing calender.
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| CN2011101517308A CN102820078A (en) | 2011-06-08 | 2011-06-08 | Rubber and plastic insulation ceramic fire-resistant cable |
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| CN2011101517308A CN102820078A (en) | 2011-06-08 | 2011-06-08 | Rubber and plastic insulation ceramic fire-resistant cable |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320038A (en) * | 2013-06-27 | 2013-09-25 | 谢宝明 | High-voltage insulated rubber tape and preparation method thereof |
| CN103589006A (en) * | 2013-10-29 | 2014-02-19 | 绿宝电缆（集团）有限公司 | High-elasticity cold-resistant modified cis-1, 4-polybutadiene rubber cable material |
| CN103709523A (en) * | 2013-12-16 | 2014-04-09 | 芜湖万润机械有限责任公司 | Moldproof bamboo charcoal rubber ring |
| CN104327388A (en) * | 2014-10-09 | 2015-02-04 | 合肥向荣环保科技有限公司 | Submarine electric cable material preparation method |
| CN104448576A (en) * | 2013-09-16 | 2015-03-25 | 湖北航天化学技术研究所 | Ethylene-propylene-diene monomer(EPDM) rubber heat-insulating material with ceramifiable ablation carbon layer |
| CN107312206A (en) * | 2017-06-23 | 2017-11-03 | 安徽吉安特种线缆制造有限公司 | A kind of building is buried to use elastomeric material |
| CN108399965A (en) * | 2017-12-20 | 2018-08-14 | 扬州曙光电缆股份有限公司 | A kind of resistance to torsion wind energy generating plant flexible cable of Novel cold-resistant |
| CN110746663A (en) * | 2019-12-04 | 2020-02-04 | 芜湖航天特种电缆厂股份有限公司 | High-mechanical-strength cable material and preparation method thereof |
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| US20030031818A1 (en) * | 1999-02-03 | 2003-02-13 | Heinrich Horacek | Halogen-free intumescent sheath for wires and optical cables |
| CN2904218Y (en) * | 2006-05-01 | 2007-05-23 | 江苏远方电缆厂有限公司 | Fire-proof cable |
| CN1973019A (en) * | 2004-03-31 | 2007-05-30 | 陶瓷聚合物控股有限公司 | Ceramifying composition for fire protection |
| CN101404189A (en) * | 2008-11-25 | 2009-04-08 | 南京工业大学 | Fast ceramic flame-resistant cable and its production method |
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2011
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030031818A1 (en) * | 1999-02-03 | 2003-02-13 | Heinrich Horacek | Halogen-free intumescent sheath for wires and optical cables |
| CN1973019A (en) * | 2004-03-31 | 2007-05-30 | 陶瓷聚合物控股有限公司 | Ceramifying composition for fire protection |
| CN2904218Y (en) * | 2006-05-01 | 2007-05-23 | 江苏远方电缆厂有限公司 | Fire-proof cable |
| CN101404189A (en) * | 2008-11-25 | 2009-04-08 | 南京工业大学 | Fast ceramic flame-resistant cable and its production method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320038A (en) * | 2013-06-27 | 2013-09-25 | 谢宝明 | High-voltage insulated rubber tape and preparation method thereof |
| CN104448576A (en) * | 2013-09-16 | 2015-03-25 | 湖北航天化学技术研究所 | Ethylene-propylene-diene monomer(EPDM) rubber heat-insulating material with ceramifiable ablation carbon layer |
| CN103589006A (en) * | 2013-10-29 | 2014-02-19 | 绿宝电缆（集团）有限公司 | High-elasticity cold-resistant modified cis-1, 4-polybutadiene rubber cable material |
| CN103589006B (en) * | 2013-10-29 | 2016-03-02 | 绿宝电缆（集团）有限公司 | A kind of high-elastic cold-resistant modification cis-1,4-polybutadiene rubber CABLE MATERIALS |
| CN103709523A (en) * | 2013-12-16 | 2014-04-09 | 芜湖万润机械有限责任公司 | Moldproof bamboo charcoal rubber ring |
| CN104327388A (en) * | 2014-10-09 | 2015-02-04 | 合肥向荣环保科技有限公司 | Submarine electric cable material preparation method |
| CN107312206A (en) * | 2017-06-23 | 2017-11-03 | 安徽吉安特种线缆制造有限公司 | A kind of building is buried to use elastomeric material |
| CN108399965A (en) * | 2017-12-20 | 2018-08-14 | 扬州曙光电缆股份有限公司 | A kind of resistance to torsion wind energy generating plant flexible cable of Novel cold-resistant |
| CN110746663A (en) * | 2019-12-04 | 2020-02-04 | 芜湖航天特种电缆厂股份有限公司 | High-mechanical-strength cable material and preparation method thereof |
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Application publication date: 20121212 |