CN202275611U

CN202275611U - Halogen free low smoke flame retarding spraying resistant shock resistant fireproof cable

Info

Publication number: CN202275611U
Application number: CN 201120361195
Authority: CN
Inventors: 李茁实; 王永
Original assignee: Baosheng Science and Technology Innovation Co Ltd
Current assignee: Baosheng Science and Technology Innovation Co Ltd
Priority date: 2011-09-26
Filing date: 2011-09-26
Publication date: 2012-06-13
Anticipated expiration: 2021-09-26

Abstract

The utility model relates to a halogen free low smoke flame retarding spraying resistant shock resistant fireproof cable, belonging to the technical field of cable manufacture, comprising a cable core, wherein the cable core is wound by a wrapping tape, the wrapping tape is wrapped by a low-smoke halogen free flame retarding polyolefin outer sheath, the cable is formed by insulating wire cores through intertwisting, the insulating wire cores are class-2 stranded copper conductors in accord with the standard of GB/T3956, wherein the copper conductors are wrapped with a mica tape, the mica tape is wrapped by an irradiation crosslinking polyethylene insulating layer through extrusion, the elongation of the insulating layer is less than or equal to 175%, the permanent elongation of the insulating layer is less than or equal to 15%, the cable core gap is filled with flame retarding inorganic paper rope, the wrapping tape is a high flame retarding polyester wrapping tape, and the coverage rate of the covering tape is 40%-50%. The halogen free low smoke flame retarding spraying resistant shock resistant fireproof cable has the advantages of flame retarding, fireproofing, anti-vibration, and of being nontoxic and environmental protection.

Description

The anti-spray of a kind of LSOH anti-flaming, shock resistance type fire-resisting cable

Technical field

The utility model relates to the anti-spray of a kind of LSOH anti-flaming, shock resistance type fire-resisting cable, belongs to the cables manufacturing technical field.

Background technology

The LSOH anti-flaming fire-resisting cable has good fire-resistance property; The flue gas that cable discharges during burning is nontoxic; Light transmittance is high, and after breaking out of fire, circuit can keep normal operation within a certain period of time; Rescue work is very helpful, can reduces casualties and property loss to the full extent.Along with improving constantly of development and national economy and the people consciousness of taking precautions against natural calamities, the low smoke, zero halogen fire-resisting cable is used more and more widely.But existing product can not be satisfied the demand, and therefore needs a kind of novel fire-resisting cable.

The utility model content

The utility model technical problem to be solved provides the anti-spray of a kind of LSOH anti-flaming, shock resistance type fire-resisting cable; This product has the excellent fire retardant fire resistance; Also have anti-vibration impact property, water-fast spray performance; Have nontoxic low cigarette environmental protection characteristic concurrently; Guarantee its cable reliability of operation under fire condition, and support personnel's safety to greatest extent, the instructions for use of large-scale public arenas such as important departments such as skyscraper, power plant, nuclear power station, tunnel and subway, restaurant, megastore, public place, control centre can be adapted to fully.

For solving the problems of the technologies described above, the anti-spray of a kind of LSOH anti-flaming of the present invention, shock resistance type fire-resisting cable comprise cable core; The outer wrapped band of cable core, band extrudes the low smoke halogen-free flame-retardant polyolefin oversheath outward, and said cable core forms by insulated wire cores is stranded; Said insulated wire cores is to meet wrapped mica tape on 2 types of twisted copper conductors of GB/T 3956, on mica tape, extrudes the IXPE insulating barrier and constitutes, and the insulating barrier percentage elongation is less than or equal to 175%; The insulating barrier permanent elongation is less than or equal to 15%; Fire-retardant inorganic paper string is filled in said cable core gap, and said band is a high flame retardant polyester band, and the band rate of putting up is 40%-50%.

The utlity model has following beneficial effect: the first, high-strength temperature-resistant presses the twisted copper wires core: fire temperature is higher than 800 ℃ usually, for this reason the conductor of our fire-resisting cable; Structure is pressed in employing; Conductive surface after overcompaction is smooth, and the mica tape flame retardant coating can closely be attached to conductive surface, has reduced the gap because of uneven flame retardant coating that causes of conductor self and insulating barrier; Helping electric field so evenly distributes; Strengthen the electric property of cable insulation, also practiced thrift the consumption of mica band simultaneously, reduce cost; Second; The flame retardant coating material is selected and the around-packing technology design: mica completing combustion is crusted in copper line surface, forms a layer insulating, has certain mechanical strength and water-fast; Can guarantee that like this cable normally moves several hours in the time of 1000 ℃; Can satisfy the requirement of extreme environment, unobstructed with the assurance circuit, so the selection of flame retardant coating is most important; Mica tape especially will be guaranteed the thickness and the integrality of refractory insulating layer in wrapped process, will control tension force in the wrapped process, and band should be smooth, and it is suitable that wrapping angle will be adjusted; The 3rd; The introducing of insulation operation irradiation crosslinking technological; It is crosslinked with the electronics radiation from machine that insulation extrudes the back, is compared to mill run, and cross-linking radiation has more following advantage: 1. product good heat resistance: cross-linking radiation can significantly improve the thermal endurance of cable; Polythene material long-term working temperature that allows behind cross-linking radiation can be brought up to 90～150 ℃ from 60～70 ℃, and the short circuit temperature is brought up to 250 ℃ by 160 ℃; 2. improve the ampacity of cable: the cross-linking radiation cable improves about 20% than the unit cross-sectional area of conductor ampacity of common cable; 3. have good insulation property and electric property; 4. mechanical strength is high, and resistance to ag(e)ing and chemical stability, environmental stress cracking resistance are good; 5. improve fire resistance, under flame condition, it possesses better one-tenth charcoal effect and dripping property of refractory; 6. prolong safe useful life, can reach 40 years; The 4th; Fire-retardant filling and fire-retardant band combine to use: this kind structural design further improved cable under flame condition the insulating outer layer structure become charcoal, shelling can; Guaranteed that cable still plays excellent protection to insulating barrier under mechanical shock and water spray double action, make cable continue operate as normal; The 5th; Design of low-smoke halogen-free flame-retardant sheath material prescription and type selecting: oversheath partly adopts low-smoke halogen-free flame-retardant sheath material; This material is base-material with the polyolefin, require to add suitable fire retardant, antismoke agent, antidriply melts agent and other compounding ingredient blend forms according to performance formula.Antismoke agent mainly is used for eliminating or reducing the black smoke of generation when burning; Make the survivor can see escape direction and road clearly; The rescue personnel can see inner case clearly and launch rescue work, the more important thing is that the toxic products that its produces is few, and entail dangers to is not to life and cause environmental pollution.This synergistic flame-retardant system has good shelling under flame condition, play the effect of heat absorption, starvation, ends combustion reaction, finally reaches the purpose that stops propagation of flame to guarantee cable primary insulation result.

Description of drawings

Fig. 1 is the structural representation of the anti-spray of the utility model LSOH anti-flaming, shock resistance type fire-resisting cable; Among the figure: 1-twisted copper conductors, 2-mica tape, 3-insulating barrier, the inorganic paper string of 4-, 5-band, 6-oversheath.

Embodiment

Meet wrapped mica tape 2 on 2 types of twisted copper conductors 1 of GB/T 3956, on mica tape 2, extrude IXPE insulating barrier 3 and constitute insulated wire cores, wherein insulating barrier 3 percentage elongations are less than or equal to 175%, and insulating barrier 3 permanent elongation are less than or equal to 15%.Insulated wire cores is twisted into cable core, and fire-retardant inorganic paper string 4 is filled in the cable core gap, the outer wrapped high flame retardant polyester band 5 of cable core, and the band rate of putting up is 40%-50%.Band extrudes low smoke halogen-free flame-retardant polyolefin oversheath 6 outward, constitutes the anti-spray of LSOH anti-flaming, shock resistance type fire-resisting cable.

What employing met GB/T 3956 2 types of stranded pressing of round monofilament copper conductor forms twisted copper conductors 1, carries out D.C. resistance after the stranded completion and detects.Outside the twisted copper conductors of testing 1, adopt mica tape 2 wrapped, extruded insulation layer 3 constitutes insulated wire cores outside mica tape 2.Insulating barrier 3 materials adopt the IXPE Insulation Material, carry out the irradiation operation after insulating exruded, behind the irradiation insulating barrier are carried out " heat is extended " performance test, guarantee under the load that percentage elongation is not more than 175%, permanent elongation is not more than 15%.With the stranded stranding of above-mentioned insulated wire cores, cable core adopts inorganic paper string 4 to fill rounding, is prerequisite with the cable core roundness, confirms to fill the concrete radical and the specification of paper string.Adopt one deck high flame retardant polyester band 5 wrapped behind the stranding, the rate of putting up is between 40%～50%.Outside band, extrude low smoke halogen-free flame-retardant polyolefin oversheath 6, constitute the anti-spray of LSOH anti-flaming, shock resistance type fire-resisting cable.

The outer wrapped mica tape of conductor, after insulating barrier and external sheath layer were intact by fire burns, wrapped mica tape on conductor was met the fire back and is generated molten white hard insulation shell silicon dioxide, has the excellent electric insulating ability; Good good high flame retardant polyester band and the fire-retardant inorganic paper string of oversheath, one-tenth charcoal property of shelling ability filled; Further guaranteed the integrality of cable under the flame condition; Guarantee that cable continues energising work, thereby make cable when catching fire, keep the normal operation of certain hour.

The utility model low smoke, zero halogen fire-resisting cable is different from common fire-resisting cable, and it has adopted different fire-retardant and fire-resistant layer structure designs.Has the mica tape flame retardant coating between conductor and the insulation; The inorganic paper string of filling high-performance refractory also strengthens with high flame retardant polyester band in the middle of becoming cable core and external sheath layer, and outermost layer adopts the Halogen protective cover material of independent research to guarantee that finished cable reaches the integrality under the external force effect under flame condition.

Claims

1. the anti-spray of LSOH anti-flaming, shock resistance type fire-resisting cable comprise cable core, the outer wrapped band of cable core; Band extrudes the low smoke halogen-free flame-retardant polyolefin oversheath outward, and to be that insulated wire cores is stranded form said cable core, it is characterized in that; Said insulated wire cores is to meet wrapped mica tape on 2 types of twisted copper conductors of GB/T 3956, on mica tape, extrudes the IXPE insulating barrier and constitutes, and the insulating barrier percentage elongation is less than or equal to 175%; The insulating barrier permanent elongation is less than or equal to 15%; Fire-retardant inorganic paper string is filled in said cable core gap, and said band is a high flame retardant polyester band, and the band rate of putting up is 40%-50%.