CN205751689U - A kind of low smoke, zero halogen fire safe type converter cable - Google Patents

Abstract

This utility model provides a kind of low smoke, zero halogen fire safe type converter cable, by multiple equally distributed phase line unit, multiple equally distributed ground wire unit and fire-resistant filling twisted synthesizing cable；The outer from-inner-to-outer of cable core is coated with the first low-smoke non-halogen flame-retardant glass fiber tape, high oxygen index (OI) oxygen barrier layer, the total screen layer of oxygen-free copper stripe, the second low-smoke non-halogen flame-retardant glass fiber tape, ceramic polyolefin, double-deck galvanized steel strip, the 3rd low-smoke non-halogen flame-retardant glass fiber tape, cracking resistant type low smoke halogen-free flame-retardant polyolefin successively.This utility model proof voltage impact is strong, it is amenable to pulse voltage when high speed, frequent frequency conversion, the harmful effect of higher hamonic wave present in converter output can be reduced, reduce noise of motor, cable possesses stronger fire resistance simultaneously, achieve that the overall height of kV middle-voltage transducer cable is fire-resistant, high fire-retardance, and low smoke, zero halogen environmental protection characteristic, medium voltage converter electricity system circuit and crowded place can be widely used in.

Description

A kind of low smoke, zero halogen fire safe type converter cable

Technical field

This utility model relates to cable technology, particularly relates to a kind of low smoke, zero halogen fire safe type converter cable.

Background technology

Along with electric power scientific and technological progress, the energy-saving effect of converter plant is fairly obvious, uses frequency conversion to adjust in heavy-duty motor Speed motor, whole generating set can economize on electricity 30%.And after using frequency control, it is achieved that the soft start of motor, make motor work Making steadily, motor bearings abrasion reduces, and extends motor service life and maintenance period.Therefore, variable-frequency control technique oil, The industrial aspect such as metallurgy, generating, railway, mine are widely used in a variety of applications.

Meanwhile, medium numerous in executive information systems, large-scale public place of entertainment, large-scale industrial and mineral, enterprise and underground engineering Place, often cable cluster laying, once breaking out of fire, fire will prolong combustion at cable and spread to other departments and floor. Add up according to fire department, in Urban Fires, wherein 2/3 be above owing to electrical equipment fault or cable traffic overload cause cable Burning spreads and causes, and in these fire, topmost hazard factor is exactly a large amount of toxic gas and smog.As traditional Flame retardant cable, low smoke and low halogen flame retardant cable, be all widely used halogen containing polymers and mixture that halogen containing flame-retardant combines. Although these cables have a good fire resistance, but once breaking out of fire, substantial amounts of smog can be produced after cable fire and have Corrosive gas of poison, this not only hinders fire fighting work and evacuating personnel, and can corrode instrument and equipment.Particularly with numerous The closing place of gathering of people, such as subway, hotel, exhibit halls and naval vessel etc., and is equipped with the field of expensive electronic equipment Closing, this problem just seems particular importance.

In conjunction with the market demand of above 2 kinds of common occasion particular/special requirements, along with the continuous progress of cable technology, Yi Zhongwu The fire safe type kV middle-voltage transducer cable of halogen low cigarette environmental protection becomes an important directions of new product development, opening of this kind of cable Sending out basis, generally carry out deep development on the basis of existing fire-resisting cable, these class cables generally use low smoke halogen-free electricity Cable material, and add flame retardant coating in the construction of cable, in low-voltage cable series, the most universal to use mica wrapping tape wrapped Cable fire is realized at conductor outer layer, but for midium voltage cable requires higher insulation quality and partial discharge quantity requires, Cannot meet its higher electric property, current domestic middle pressure fire-resisting cable, for realizing fireproof construction, is all in metallic shield work Suitably developing new material, new construction after sequence, the flame retardant coating the most generally existed is to extrude Ceramic silicon rubber.

Being limited to extrude the operational characteristic of Ceramic silicon rubber flame retardant coating, manufacture silicone rubber flame retardant coating, early stage need to refine glue, squeezes Need after system to vulcanize through high-temperature pipe, so speed of production is slow, and the thickness of the silastic-layer of the wayward cable of extrusion pressing type mould , easily there is the phenomenon that local is the thinnest in degree, affecting the overall fire-resistant effect of cable, if strictly controlling thinnest point, being then likely to result in former Material exceedes technique consumption, and meanwhile, the prices of raw materials are higher, directly influences cable holistic cost, therefore, presses in Novel fire-resistant type Converter cable structure and handicraft design still has practicality progress space.

Utility model content

The purpose of this utility model is, for the problems of above-mentioned fire safe type kV middle-voltage transducer cable, proposes one Low smoke, zero halogen fire safe type converter cable, this cable environmental protection, burning does not produce harmful halogen gas, meanwhile, by rationally Property design, more preferably meet the high flame retardant of midium voltage cable in engineering, high fire resistance, high shielding, high proof voltage impact, and The demands such as low smoke and zero halogen environmental protection, can be widely used in medium voltage converter electricity system circuit and crowded place, for emergency Under electric power system safely provide powerful support, escort safely for personal safety and public property.

For achieving the above object, the technical solution adopted in the utility model is utility model: a kind of low smoke, zero halogen fire safe type Converter cable, described cable core is by multiple equally distributed phase line unit, multiple equally distributed ground wire unit and fire-resistant Fill twisted synthesizing cable；

Described phase line unit includes the first oxygen-free copper conductor, the from-inner-to-outer co-extrusion successively conductor screen outside oxygen-free copper conductor Cover layer, an XLPE insulating barrier, insulation screen and overlap around the oxygen-free copper stripe wrapping in outside insulation screen；

Described ground wire unit includes that the second oxygen-free copper conductor, from-inner-to-outer are coated on the mica tape outside oxygen-free copper conductor successively Fireprotection layer and the 2nd XLPE insulating barrier；

The outer from-inner-to-outer of described cable core be coated with successively the first low-smoke non-halogen flame-retardant glass fiber tape, high oxygen index (OI) every The total screen layer of oxygen layer, oxygen-free copper stripe, the second low-smoke non-halogen flame-retardant glass fiber tape, ceramic polyolefin, double-deck galvanized steel strip, the Three low-smoke non-halogen flame-retardant glass fiber tapes, cracking resistant type low smoke halogen-free flame-retardant polyolefin.

Further, described oxygen-free copper conductor is the conductor that cross section is circle that stranded copper wire is stranded.

Further, described conductor shield be semiconductive internal shield, a described XLPE layer be chemical dry crosslinking, 2nd XLPE layer is irradiation or high-temperature steam crosslinking, and described insulation screen is semiconductive external shielding layer.

Further, described fire-resistant it is filled to the fire-resistant filling of ceramic.Common flame-retardant fills easily efflorescence after burning, no The internal structure of energy sustainable protection cable core, the fire-resistant filling characteristic of ceramic is fire-resistant, fire-retardant, LSZH, without dust, nothing Heavy metal and other harmful substances, form ceramic duricrust under 650 DEG C of environment above, do not melt, do not drip, have good simultaneously Good heat conductivity, can dispel the heat in time in cable work, reduces heat accumulative, for cable in case of fire, and can be in its cable Portion's structure plays fixing protective effect.

Further, described low-smoke non-halogen flame-retardant glass fiber tape is to be passed through by the material such as glass wool cloth, fire retardant adhesive Gluing, drying and make, have high oxygen index (OI) (more than 50), stretching resistance is strong, will not fold is disconnected, smokeless halogen-free is nontoxic, insulation is good Feature.Described first low-smoke non-halogen flame-retardant glass fiber tape, while playing colligation core effect, is protected as one layer of flame-retardant layer Protecting core, described second low-smoke non-halogen flame-retardant glass fiber tape had both played anti-flammability effect, can buffer cable simultaneously and lay In installation process, come from the stress of the from-inner-to-outer of steel band.

Further, described high oxygen index (OI) oxygen barrier layer is the low-smoke halogen-free flame-resistant polyolefin oxygen barrier that oxygen index (OI) is more than 40. When meeting fire burning, this material will separate out large quantity of moisture to reduce ambient temperature, and forming one, not melt the aluminium oxide that do not fires hard Shell, to completely cut off cable core and extraneous air contact, the cable of burning is by self-extinguish, same in the fire-retardant rank that improve cable Time, play the effect of cooling fire insulation.

Further, described ceramic polyolefin is flame retardant coating, under the extrusion condition of tubular molding tool, can be coated with uniformly Overlay on cable, coating thickness can more accurate perception, and the course of processing produces rapidly, and technique simply can produce continuously, compares Ceramic silicon rubber is not required to sulfuration, and production operation is simpler, and production cost and energy consumption all decrease, and described flame retardant coating material exists In the case of 650 DEG C of temperatures above or flame calcination, it is possible to be quickly generated complete ceramic-like duricrust, housing does not ftractures, does not drips, Except having the electric isolution performance of excellence, also there is fabulous oxygen barrier effect of heat insulation, it is possible to isolation thermal-flame is to line-internal Infringement, delay internal material to decompose, it is ensured that circuit is the most unimpeded.

Further, the total screen layer of described oxygen-free copper stripe uses copper strips overlap around-packing technology, using copper strips layer as whole electricity Total screen layer of cable structure.

Further, described double-deck galvanized steel strip is gear fire bed, utilizes the characteristic reinforcement electric cable that steel fusing point high rigidity is high Body interior, anti-mechanical damage, stop that flame corrodes.

Further, the oxygen index (OI) of described cracking resistant type low smoke halogen-free flame-retardant polyolefin is more than 35.Low-smoke non-halogen flame-retardant By force, it is to avoid the probability of sheath material propagating flame.

Further, described cable core by 3 equally distributed phase line unit, 3 equally distributed ground wire units and Fire-resistant filling twisted synthesizing cable, and phase line unit, ground wire unit are all according to the centrosymmetry distribution of 120 degree of phase angle.

Further, the oxygen-free copper stripe of described 3 equally distributed phase line unit contacts with each other well, described oxygen-free copper stripe As the metallic shield of core, both avoided High Level AC Voltage that facility and the signal of outside are interfered, can carry certain simultaneously Short circuit current, it is ensured that cable and the Electrical Safety of electricity system.

This utility model low-smoke zero-halogen fire-resistant type converter cable is rational in infrastructure, compact, and the division of labor of each Rotating fields clearly, has ladder Spending and complement each other, using said structure, cable is easily fabricated, uses many integration structure so that cable has good electricity Electromagnetic shielding performance, cable is obvious in fire-retardant, fire-resistant, low smoke and zero halogen characteristic effect, is high green of a kind of applied widely, security performance Color asepsis environment-protecting product, has the advantage that compared with prior art

(1) the high shielded cable of this structure can anti-electromagnetic induction, imperfect earth and power line Conduction Interference, reduce inductance, Prevent induction electromotive force excessive.Screen layer had both played the suppression electromagnetic wave effect to emission, again can leading to as short circuit current Road, can play the protective effect of neutral core；Centrosymmetrical structure, due to the interchangeability of wire, has more preferable electromagnetic compatibility Property, suppression electromagnetic interference is played a role, the humorous odd frequency in that of high order can be offset, improve frequency conversion motor Special electric The anti-interference of cable, decreases the electromagnetic radiation in whole system.

(2) filling fire resisting material locating core, core position does not offsets, and fire-resistant packing material has preferable intensity and tough Property, processing characteristics is excellent, hydrophobic, can in the range of-40 DEG C～200 DEG C life-time service, fire-resistant packing material has the electricity of excellence Gas performance, heat conductivity is good, in the case of flame calcination, forms stiff shell, does not shrinks, do not drips, can preferably fix core Position, it is ensured that while cable core structure does not occur metataxis and electrical property change, it is ensured that cable low smoke, zero halogen refractory ring Protect.

(3) production efficiency is high, and employing tubular molding tool extruded ceramic polyolefine material, can be uniform as cable fire layer Be coated on cable, coating thickness can more accurate perception, and the course of processing produces rapidly, and technique simply can produce continuously, Comparing Ceramic silicon rubber and be not required to sulfuration, production operation is simpler, and production cost and energy consumption all decrease.

(4) refractory ability is strong, by described structure and material selection, can improve cable entirety fire-resistance property, the construction of cable Design and the selection of material, according to from outside to inside, multilamellar have gradient structure design stop flame cable internal structure is invaded Evil, the structure design of many integration makes cable all have higher fire resistance.

(5) fire resistance is strong, and a kind of low-smoke zero-halogen fire-resistant type converter cable designs original intention in structure, is all according to fire-retardant A⁺Level design, while guaranteeing cable fire ability, high flame retardant rating can ensure that cable does not the most do flame Transmitting carrier, from cable self-view, reduces fire damage to greatest extent.

To sum up, this utility model low-smoke zero-halogen fire-resistant type converter cable production technology simple and fast, guaranteeing cable electricity The while of gas performance, fire-retardant, fire line and low smoke and zero halogen characteristic, energy-saving and cost-reducing environmental protection.The Halogen performance of this cable after testing PH weighted value >=4.3, electrical conductivity weighted value≤10 μ S/mm, minimum light transmittance >=60% of low cigarette characteristic, electric property is superior, In the case of fire resistance can realize 950 DEG C of flame calcinations, run more than 90min.

Accompanying drawing explanation

Fig. 1 is the schematic cross-section of this utility model a kind of low-smoke zero-halogen fire-resistant type converter cable.

Detailed description of the invention

Below in conjunction with embodiment, this utility model is further illustrated:

Embodiment 1

Fig. 1 is the schematic cross-section of this utility model a kind of low smoke, zero halogen environment-friendlymid-voltage mid-voltage fire resistant cable.

Present embodiment discloses a kind of low smoke, zero halogen environment-friendlymid-voltage mid-voltage fire resistant cable, this cable uses level effect clearly demarcated Gradient design, cable overall can realize high electromagnetic wave shielding, high fire-retardance, high fire-resistant, the security feature of low smoke and zero halogen, close for population Powerful technical guarantee is provided in the case of collection frequency conversion electricity consumption region breaking out of fire.Its concrete structure is as it is shown in figure 1, include stranded Three bursts of phase line unit (core) and three strands of ground wire units, described core includes that the first oxygen-free copper conductor 1 is led with the second oxygen-free copper Body 7, the first oxygen-free copper conductor 1 and the second oxygen-free copper conductor 7 are the conductor that cross section is circle that stranded copper wire is stranded, institute The copper wire used is the red copper that purity is more than 99.98%.

Described phase line unit includes the first oxygen-free copper conductor 1, the first outer three-layer co-extruded conductor shield of oxygen-free copper conductor 1 2, an XLPE insulating barrier 3, insulation screen 4, each core insulation screen 4 the most overlapping outer wrapped oxygen-free copper stripe 5 is as core Split-phase metallic shield.

Described ground wire unit comprises the second oxygen-free copper conductor 7, mica tape fireprotection layer 8 and the 2nd XLPE insulating barrier 9,

Twisted synthesizing cable when three strands of phase line unit and three strands of ground wire units, the gap of core uses low smoke, zero halogen ceramic fire-resistant Fill 6.

Cable core (cable core) is become to use outward the first low-smoke non-halogen flame-retardant glass fiber tape 10 to tighten, described stranding band Extrude outward the high oxygen index (OI) oxygen barrier layer 11 cooling refuge floor as cable, outside described cooling fire bed, overlapping wrapped oxygen-free copper stripe As the total screen layer of oxygen-free copper stripe 12, total shielding is outer the most successively around the second low-smoke non-halogen flame-retardant glass fiber tape 13, extrude pottery outward Change polyolefin 14 is as cable fire layer, and the wrapped double-deck galvanized steel strip 15 of described flame retardant coating external series gap, outside double-deck galvanized steel strip 15 Overlapping wrapped 3rd low-smoke non-halogen flame-retardant glass fiber tape 16, collectively constitutes the gear fire bed of cable, extrudes outside gear fire bed both it Cracking resistant type low smoke halogen-free flame-retardant polyolefin 17 (also can extrude cracking resistance rat-and-ant proof type low-smoke and halogen-free flame retardant polyolefin jacket), makees Fire-retardant protection against rodents restrictive coating for cable.

A kind of low-smoke zero-halogen fire-resistant type converter cable electric property that the present embodiment provides is superior, advantages of good shielding performance, resistance Combustion fire resistance is high, low smoke, zero halogen environmental protection.In the case of without flame calcination, cracking resistant type low smoke halogen-free flame-retardant polyolefin 17 Meet fire in halogen-free low-smoke high-flame characteristic, it is ensured that flame does not prolong cable jacket and propagates, the 3rd low-smoke non-halogen flame-retardant glass fibre With double-deck galvanized steel strip 15, band 16 can stop that flame, to cable internal communication, has stronger anti-mechanical damage effect simultaneously, pottery Change polyolefin 14, as cable refuge floor, crusts in the case of a high temperature, has the heat insulation high-temperature stability of oxygen barrier, delay internal material Decomposing, high oxygen index (OI) oxygen barrier layer the 11, first low-smoke non-halogen flame-retardant glass fiber tape 10, in the case of flame calcination, discharges certain Water of crystallization, plays the fire-retardant cooling effect of fire insulation, its internal fire-resistant filling of ceramic 6, and preheated ceramic forms stiff shell, Do not shrink, do not drip, can preferably fix core position, it is ensured that cable core structure does not occur metataxis and electrical property change While, it is ensured that the fire-resistant environmental protection of cable low smoke, zero halogen.

Embodiment 2

Present embodiment discloses a kind of low smoke, zero halogen fire safe type converter cable, its structure is substantially the same manner as Example 1, no Be described cable phase conductor nominal area and gnd conductor nominal area different from embodiment 1；

This utility model is not limited to a kind of low-smoke zero-halogen fire-resistant type converter cable described in above-described embodiment, wherein The change of oxygen-free copper conductor structure, each layer thickness change all within protection domain of the present utility model.

Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, rather than it is limited System；Although being described in detail this utility model with reference to foregoing embodiments, those of ordinary skill in the art should Understand: the technical scheme described in foregoing embodiments still can be modified by it, or to the most some or all of Technical characteristic carries out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from this practicality new The scope of type each embodiment technical scheme.

Claims (8)

1. a low smoke, zero halogen fire safe type converter cable, it is characterised in that described cable core is by multiple equally distributed phases Line unit, multiple equally distributed ground wire unit and fire-resistant filling twisted synthesizing cable, described phase line unit and ground wire unit quantity phase Deng；

Described phase line unit includes the first oxygen-free copper conductor (1), the from-inner-to-outer co-extrusion successively conductor screen outside oxygen-free copper conductor Cover layer (2), an XLPE insulating barrier (3), insulation screen (4) and overlap around wrapping in insulation screen (4) oxygen-free copper stripe outward (5)；

Described ground wire unit includes that the second oxygen-free copper conductor (7), from-inner-to-outer are coated on the mica tape outside oxygen-free copper conductor successively Fireprotection layer (8) and the 2nd XLPE insulating barrier (9)；

The outer from-inner-to-outer of described cable core be coated with successively the first low-smoke non-halogen flame-retardant glass fiber tape (10), high oxygen index (OI) every Oxygen layer (11), the total screen layer of oxygen-free copper stripe (12), the second low-smoke non-halogen flame-retardant glass fiber tape (13), ceramic polyolefin (14), double-deck galvanized steel strip (15), the 3rd low-smoke non-halogen flame-retardant glass fiber tape (16), cracking resistant type low-smoke non-halogen flame-retardant polyene Hydrocarbon (17).

Low smoke, zero halogen fire safe type converter cable the most according to claim 1, it is characterised in that described oxygen-free copper conductor is many The conductor that cross section is circle that stock copper wire is stranded.

Low smoke, zero halogen fire safe type converter cable the most according to claim 1, it is characterised in that described conductor shield is half Conduction internal shield, a described XLPE layer are chemical dry crosslinking, and the 2nd XLPE layer is irradiation or high-temperature steam crosslinking, described Insulation screen is semiconductive external shielding layer.

Low smoke, zero halogen fire safe type converter cable the most according to claim 1, it is characterised in that described fire-resistant be filled to pottery Change fire-resistant filling.

Low smoke, zero halogen fire safe type converter cable the most according to claim 1, it is characterised in that described high oxygen index (OI) oxygen barrier layer For the oxygen index (OI) low-smoke halogen-free flame-resistant polyolefin oxygen barrier more than 40.

Low smoke, zero halogen fire safe type converter cable the most according to claim 1, it is characterised in that the low cigarette of described cracking resistant type without The oxygen index (OI) of halogen fire retardant polyolefin is more than 35.

Low smoke, zero halogen fire safe type converter cable the most according to claim 1, it is characterised in that described cable core is by 3 Equally distributed phase line unit, 3 equally distributed ground wire units and fire-resistant filling twisted synthesizing cable, and phase line unit, ground wire list Unit is all according to the centrosymmetry distribution of 120 degree of phase angle.

Low smoke, zero halogen fire safe type converter cable the most according to claim 7, it is characterised in that described 3 equally distributed The oxygen-free copper stripe of phase line unit contacts with each other well.