CN103325473B - Skyscraper fire resisting low-smoke halogen-free medium voltage crane cable and its production technology - Google Patents
Skyscraper fire resisting low-smoke halogen-free medium voltage crane cable and its production technology Download PDFInfo
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- CN103325473B CN103325473B CN201310215469.2A CN201310215469A CN103325473B CN 103325473 B CN103325473 B CN 103325473B CN 201310215469 A CN201310215469 A CN 201310215469A CN 103325473 B CN103325473 B CN 103325473B
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Abstract
The present invention discloses a kind of skyscraper fire resisting low-smoke halogen-free medium voltage crane cable and its production technology, and cable core, binding strap, thermal insulation cooling layer and gear fire bed are followed successively by from the inside to the outside；The cable core is stranded into circular configuration by three insulated wire cores and three filling reinforcers；The insulated wire cores are followed successively by conductor, conductor shielding, insulation, insulation shielding and metallic shield from the inside to the outside；The conductor is aluminium alloy molded line lay configuration；The formula of the material of thermal insulation cooling layer is by weight percentage：EVA：20 ~ 30%, LLDPE plastics：8~15%、AL（OH）3：40~50%、Mg(OH)2：20 ~ 30%, it is other：2~5%.Cable of the present invention is provided simultaneously with the midium voltage cable of long length Lifting Capacity and refractory ability, can continue as high-rise building power supply when fire occurs, and power is provided especially for escape elevator and safety device.
Description
Technical field
There is low-smoke zero-halogen fire-resistant the present invention be directed to improvement of the skyscraper with lifting midium voltage cable, more particularly to one kind
The skyscraper of characteristic lifting midium voltage cable and its production technology.
Background technology
With the fast development of the modernization of society, urban constructionization builds also more and more crowded, so building is only
Can be toward aerial development.High building (Hong Kong, Macao and Taiwan being free of, without the project planned) in Chinese Program Construction just has 10
Project：632 meters, 121 layers of Shanghai Center Building (Shanghai CenterTower)；597 meters of 117 mansion of Tianjin China, 117
Layer；Shenzhen capital fund melts 439 meters, 97 layers of central plaza；384.2 meters, 76 layers of Shenyang Heng Long municipal governments square；Dalian Yu Jing centers
383 meters, 80 layers of (Dalian Eton Center)；360 meters, 59 layers of Guangzhou Guang Sheng International Buildings；Wuhan Ge Zhou Ba International Square
350 meters, 69 layers；339 meters, 70 layers of Nanjing Deji Plaza second phase；333 meters, 72 layers of Tianjin Jia Li centers；Wave high joint in Chongqing is international
330 meters, 72 layers of mansion.Designed according to floor economic performance, storey setting is installed in top layer as the equipment for power transmission and distribution of electric power
It is the most economical.This is accomplished by vertically being attached in high building with a midium voltage cable, medium voltage electricity is delivered into roof outside building, then
Voltage required for being depressured to is used for building.In order to fully use space, the general cable shaft space to cable lifting
Limited, it is the smaller the better economically to set out, so crane cable lays generally high building top layer stress, cable its
Remaining part point equal stress is suspended in high building in the pulling force on summit, and centre does not stress, thus this construction of cable just with conventional electricity
Cable has very big difference.
Skyscraper is general more than 300 meters, so personnel lean on elevator substantially up and down, so in skyscraper, even if
Generation fire, will also go downstairs from elevator and escape.Other all security protection facilities are also required to driven by power.So as defeated to building
The overall channel of electricity --- middle pressure crane cable must possess the performance for being capable of maintenance energization when fire is carried out, that is, have
Standby fire-resistance property.There must be low-smoke non-halogen flame-retardant characteristic simultaneously, it is ensured that occur fire Shi Gei building personnel and strive for safer
Escape environment.
Although prior art also have some on it is high-rise crane cable and it is middle pressure fire-resisting cable patent document, its electricity
Cable structure is to consider high-rise lifting and fire resistance respectively, does not consider two performances and possesses jointly, otherwise for resistance to
The structure of fiery midium voltage cable, only only accounts for cable when fire occurs, and the heat for being produced fire using temperature insulating material is stopped
Structure in outside, but such structure also counteracts that in cable normal course of operation cable conductor due to electric current by and produce
Raw heat is distributed outward, the current capacity of final influence cable or the service life of cable.
Wherein, the public technology on crane cable for high-building is main public with Chinese patent CN200510094704.0
Open《Crane cable for high-building》Based on design route.This invention is with three core high pressure crane cables to skyscraper
Improve, it is characterised in that insulated core uses exhausted by carrying steel core outsourcing with three between single insulated cable, single insulated cable
Edge section is filled in cambered-surface fan-shaped, both twisted synthesizing cables, and periphery is tightened by the binding of high intensity band.This invention uses cambered-surface fan-shaped
Supporting body and adjacent cable core contact area are big, substantially increase frictional force between the two, and auxiliary twisted synthesizing cable, binding are tightened even more
Frictional force between the two and globality are increased, the overall tensile strength of cable has been put forward significantly, thus can bear greatly overall anti-
Tensile strength, makes it possible to adapt to 150 meters or higher building hanging is laid.Be conducive to improving current-carrying capacity of cable simultaneously, flow can
10-30% or so is improved, cable weight can mitigate 20~30%, greatly reduce cable cost.Cambered-surface fan-shaped supporting body is to electricity
Cable lateral pressure is small, and the safe and reliable property of cable is good, and three distinguish carrying absolute construction, reduce technique productions difficulty.Come from product structure
See, this cable possesses high-rise lifting function, does not possess fire-resistance property.So this cable is in the case of high-rise building with fire disaster,
Do not possess continuation and energize power.So after occurring fire, all electrical equipments of skyscraper can only be by the electricity that usually stores
Power is maintained, but the electricity of storage is limited, that is to say, that substantial amounts of security protection facility that technology is designed in skyscraper, due to
Supply of electric power is not enough and can not play from design function.
And it is main with disclosed in Chinese patent CN200710190369.3 on middle pressure fire-resisting cable public technology《Middle pressure is resistance to
Thermoelectricity cable》Based on design route.This invention is related to pressure transmission of electricity fire-resisting cable in one kind, it is characterized in that the middle outer flame retardant coating of pressure cable core
For inner side refractory inorganic fiber thermal insulation layer, and outside normally catch fire using for soft type thermo-setting elastomer, chance, are changed into gear
The composite fire thermal insulation layer of fire screen thermosphere, described thermo-setting elastomer, by 30-50wt% silicon substrate elastomeric material, 40-60wt%
Low temperature frit, 4-10wt% vulcanizing agents in inorganic fillings, 5-15wt%, mixing extrusion forming, vulcanization are formed.The composite fire
Thermal insulation layer, is relatively soft jacket material in the case where not running into flame conditions, it can be ensured that the good bendability of fireproof construction when normal
Can, then it is changed into package shape refractory heat-insulating structure rapidly when meeting fire or high temperature, remains to maintain certain time in fire fighting environment
It is not damaged by, effectively stops the damage of flame or high temperature to primary insulation, when 850 DEG C of flame temperatures of outer layer, inner side insulating surface
Temperature is less than 180 DEG C.Such patent also have ZL200720042350.X, ZL201120193504.1,
ZL201120096435.2 etc., its basic ideas all keep off fire bed, this layer of material to set up thermal insulation outside midium voltage cable metallic shield
Material is mostly magnetization silica gel, material when without burning for elastomer properties, is magnetized gear fire bed effect after burning.So
Structure there is certain fire resistance, but magnetization silicon rubber will play enough resistance to fire actions, it is necessary to enough after magnetization
Thickness, but insulating layer can obstruct external flame temperature to transmission inside cable, equally also obstruct cable due to power transmission
And the heat produced is transmitted to the periphery, that is to say, that this cable influences the heat sinking function of cable using such structure, finally leads
Send a telegraph the decline of the current capacity of cable.This other construction of cable does not terminate to thermal insulation gear fire bed, and there be wrapped gear outside
Fiery material and fire-retardant outer sheath material, the heat dispersion to cable is all impacted and causes cable current capacity by these
Further decline.So such structure is not saved, it is necessary to further optimize.
The new thinking of middle pressure another comparison of fire-resisting cable public technology discloses for Chinese patent ZL201220559823.4
's《Fire-resisting cable is pressed in self-locking armouring》.This utility model, which is related in self-locking armouring, presses fire-resisting cable, including：Cable core and
Refractory insulating layer, sheath, armor, oxygen barrier layer and oversheath on the outside of the cable core are wrapped in successively.Cable core includes multiple
Metallic shield insulated wire cores, the quantity of the metallic shield insulated wire cores is 3, and the metallic shield insulated wire cores are in " product " word
Shape is arranged, and filler is provided between the metallic shield insulated wire cores.Armor is copper or copper alloy self-locking armouring.Oxygen barrier layer
Material be halogen-free low-smoke high-flame cable material of polyolefin.From structure, this cable is from the shield that is of five storeys outward into cable core
Layer, its purpose be thermal insulation keep off fire action, performance be the floor height flame-retarding characteristic and high heat resistance characteristic, can be by flame and flame
The high temperature brought is blocked in outside cable insulation core, but so abundant structure equally influences the heat dissipation characteristics of cable, finally
Cause the decline of the current capacity of cable.
The content of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art there is provided one kind is simple in construction, and the fiery effect of thermal insulation gear is more
It is good, and the operation heat dispersion of the influence cable of minimum degree, the current capacity for carrying high pressure fire-resisting cable of maximum capacity
The construction of cable, and produce the process innovation of this cable.
It is a kind of skyscraper fire resisting low-smoke halogen-free medium voltage crane cable to realize the object of the invention technical scheme, by it is interior extremely
It is outer to be followed successively by cable core, binding strap, thermal insulation cooling layer and gear fire bed；The cable core is by three insulated wire cores and three filling reinforcers
It is stranded to form circular configuration；The insulated wire cores are followed successively by conductor, conductor shielding, insulation, insulation shielding and metal from the inside to the outside
Shielding；The conductor is aluminium alloy molded line lay configuration；The formula of the material of thermal insulation cooling layer is by weight percentage：
EVA：20~30%, LLDPE plastics：8~15%, AL (OH)3：40~50%, Mg (OH)2：20~30%, it is other：2~5%.
The metallic shield of three insulated wire cores contacts with each other；The section fill factor of the conductor is 94%.
The filling reinforcer includes the load carrier of internal carbon fiber rod material and extruded outside load carrier
The fan-shaped packing of high-strength polyolefin material.
The gear fire bed is the chain sheathed structure of metal tape, and section is " ∽ " shape, and circle circle interlocks.
The metal tape thickness of the gear fire bed is 0.5mm.
Internal diameter big 1~3mm of the internal diameter than thermal insulation cooling layer of the gear fire bed.
Also include the oversheath for being extruded in the polyolefine material outside gear fire bed.
A kind of production technology of skyscraper fire resisting low-smoke halogen-free medium voltage crane cable, after binding strap is tightened, extrusion
It is by weight percentage：EVA：20~30%, LLDPE plastics：8~15%, AL (OH)3：40~50%, Mg (OH)2：20~
30%th, it is other：The insulating layer of 2~5% material formation constituted；The deep low compression ratio spiral shell such as the screw rod use of the extrusion equipment
Bar, extrusion die is not more than 35 ° of plsitive mold using extrusion angle；After the cooling of insulating layer extrusion complete entrance tank not on
Disk, is directly entered the chain armouring process of gear fire bed, treats upper disk circulation again after the completion of armouring process.
Employ after above-mentioned technical proposal, the present invention has following positive effect：(1) present invention by conductor by original
Copper make aluminium alloy conductor into, significantly reduce the conductor weight of cable.In order to ensure cable fire lifts performance, cable must also
Palpus setting insulating layer and gear fire bed, the present invention use thermal insulation cooling layer.According to design requirement, cable needs to protect under flame status
Power supply can be continued by holding the complete performance of cable, i.e. cable.This is necessary to ensure that cable under the flame condition of high temperature, insulation and tension
Reinforcer keeps the electrically and mechanically performance that the structure originally has, and this needs thermal insulation cooling layer that outside flame high temperature is blocked in into electricity
Outside cable.Current public technology basic ideas be from the material (such as magnetizing silicon rubber) with very high thermal resistivity and
Increase the layer material thickness, temperature insulating is played by improving the thermal resistance mode of this layer.It is outer that such structure can play stop
The effect of portion's flame high temperature, but the heat for also blocking cable transmission electric energy and producing, ultimately cause cable premature aging or
Influence the current capacity of cable.Thermal insulation of the present invention cools layer except the effect of thermal insulation, is also equipped with running into what is after flame high temperature cooled
Ability.The layer material, which is adopted, increases AL (OH)3、Mg(OH)2Proportioning fraction, mainly utilize AL (OH)3、Mg(OH)2The knot carried
Brilliant water, in the case where meeting the fiery condition of high temperature, just fills after crystallizing the principle of water cooling, the proportioning fraction for increasing both materials
The effect of its cooling has been waved in distribution.
(2) conductor of the invention is aluminium alloy molded line lay configuration, is formed using many shoe single line concentric strandings, so
Conductor structure, substantially increase the utilization rate of effective area under identical appearance size, this uses aluminium alloy also for satisfaction
Conductor substitutes copper conductor, because resistivity is lifted and causes the increased requirement of cross-sectional area of conductor., can using shoe stranded conductor structure
While by conductor effective cross-section increase, conductor diameter is reduced as far as possible.Using shoe stranded conductor structure, cross-sectional area of conductor filling
Coefficient can reach 94%.Identical traffic capacity, aluminium alloy conductor external diameter and copper conductor external diameter are very nearly the same.Twisted in addition using shoe
Conductor structure is closed, it is conductor profile more rounding, smooth, it is more beneficial for improving the field effect of conductor.
(3) filling reinforcer plays the tensile elements effect for undertaking whole cable weight in lifting fire-proof medium-voltage cable.Often
The way of rule cable is to use wire armoring structure, it is necessary to enclose steel wire in cable periphery winding one, and the concentration pulling force of steel wire is equal
The even periphery for being distributed to cable.The overall weight of cable is also increased while steel wire winding, steel wire is receiving pulling force work in addition
With while, be that to be delivered to pulling force on cable by spiral winding structure be frictional force and pressure, because steel wire is circular shape
Shape, so steel wire and cable are linear contact lays, pressure is very big, so such structure, which is generally suitable for cable, only has micro difference
Lay requirement.The gap filling position that the cable filling reinforcer of the present invention is arranged in cable insulation core stranding, sets three
Sector filling reinforcer, stranding is into cable conductor together with insulated wire cores.Under lifting tension force effect, filling reinforcer and core
The pressure conversion that contact surface is produced carries the gravity of cable into frictional force.Described filling reinforcer is in steel wire rope or carbon
The fan-shaped packing of high-strength polyolefin material formation is extruded on fiber rod, in order to be damaged in view of the metal swirl of ac transmission
Consumption, optimal selection is as the load carrier for strengthening filling member using carbon fiber rod.Carbon fiber rod is nonmetallic materials, is not produced
Electromagnetic induction and eddy-current loss.Other intensity is more than steel wire, small by temperature elongation in addition, is the optimal material for lifting load-bearing.
(4) gear fire bed main function is that the naked light of flame is blocked in into Exterior cable, does not allow its flame to be sent out to inside cable
Exhibition.Current public technology basic ideas are as gear fire bed from the fire proofing with very high oxygen index (OI).At present mainly
Material is magnetization silicon rubber, and using magnetized performance of being heated after silicon rubber burning is magnetized, magnetized protection is formed in cable periphery
Layer, it is ensured that the Rotating fields do not rupture under flame status, by flame barrier in cable periphery.Such structure has only served gear fire
Effect, the effect not cooled, thus in order to preferably realize lifting fire-proof medium-voltage cable fire resistance, not only need tool
The standby fiery characteristic of gear, must possess cooling characteristic.The gear fire bed of the present invention, uses the chain sheathed structure of aluminum alloy strip, not only
With the fiery effect of gear, more preferable flexural property is also equipped with, the radiating and cooling effect more having.Chain armouring uses 0.5 thickness
Aluminum alloy strip, aluminum alloy material is lightweight, is conducive to cable hoisting security.Aluminium alloy has good thermal conductivity simultaneously
Can, structure is added for bellows structure, also with good heat dissipation characteristics.There is good bandability, excellent in heat dissipation effect before by fire
Characteristic, is conducive to setting up the current capacity installed and improve cable；Fiery effect is kept off by being played after fire, it is ensured that cable internal structure is not
Damaged by naked light.Other chain sheathed structure also has certain resistance to compression and tensile characteristics, for crane cable, with more
High Hoisting Security characteristic.
(5) present invention passes through AL (OH)3、Mg(OH)2The crystallization water with fire distillation cooling physical phenomenon play thermal insulation effect
Really, so farthest adding AL (OH) in the layer material3、Mg(OH)2, but so big amount can be very big after adding
The mechanical performance and processing characteristics of the layer material are reduced to degree, the present invention passes through the innovation in infrastructure device and moulds of industrial equipment
This problem is solved well.The deep low compression ratio screw rod such as present invention use, extrusion die uses plsitive mold, but die sleeve
Extrusion angle is not more than 35 °, and the purpose of these requirements is to meet the layer material to add substantial amounts of AL (OH)3、Mg(OH)2Afterwards, extrusion is rubbed
Wipe power big, the requirement of poor processability.The design of extrusion screw rod and mould must all consider that extrusion compression ratio can not be big, after extrusion
The characteristics of draw ratio is small, so using low-angle plsitive mold, both ensure that low compression ratio was in turn ensured that almost nil
Draw ratio.Gear fire bed (the chain armour of outer layer gear fire is immediately entered after the thermal insulation cools layer extrusion intake chamber cooling drying simultaneously
Fill metal level) process, supplied by means of the mechanical strength of the chain armor of outside, be homogenized the mechanically stressed of internal insulating layer,
Ensure that insulating layer is not damaged by mechanical external force, give a full play of effect of its thermal insulation cooling.
Brief description of the drawings
In order that present disclosure is easier to be clearly understood, it is right below according to specific embodiment and with reference to accompanying drawing
The present invention is described in further detail, wherein
Fig. 1 is cross-sectional structure schematic diagram of the invention.
Fig. 2 is Fig. 1 left view sectional view, and reaction is the chain sheathed structure for keeping off fire bed.
In accompanying drawing marked as：
Cable core 1, insulated wire cores 11, conductor 11-1, conductor shielding 11-2, insulation 11-3, insulation shielding 11-4, metallic shield
11-5, filling reinforcer 12, load carrier 12-1, fan-shaped packing 12-2, binding strap 2, thermal insulation cooling layer 3, gear fire bed 4.
Embodiment
(embodiment 1)
See Fig. 1, a kind of skyscraper fire resisting low-smoke halogen-free medium voltage crane cable of the present embodiment is followed successively by from the inside to the outside
Cable core 1, binding strap 2, thermal insulation cooling layer 3 and gear fire bed 4.Cable core 1 is twisted by three insulated wire cores 11 and three filling reinforcers 12
Close and form circular configuration.Insulated wire cores 11 are followed successively by conductor 11-1, conductor shielding 11-2, insulation 11-3, insulation screen from the inside to the outside
Cover 11-4 and metallic shield 11-5.Required according to AC transmission system, midium voltage cable is usually the transmission of A, B, C three-phase power, institute
Using cable core as three core lay configurations, the metallic shield 11-5 of three insulated wire cores 11 contacts with each other, and is so conducive to three-phase equilibrium
Effect.Conductor 11-1 section fill factor is 94%, it would however also be possible to employ copper, but the present invention preferentially uses aluminium alloy conductor, by
It is smaller in its proportion, it is more beneficial for lifting requirements.Conductor 11-1 aluminium alloy uses aluminium for base material, it with the addition of 0.1%~
0.2% copper, 5%~8% iron, 0.1% silicon and rare earth material (such as boron), smelting hot rolling is formed.Pass through these yuan
The aluminium alloy conductor that element fusion is made, its resistivity is up to 63%, and intensity is up to more than 110MPa, and elongation at break is up to 15%
More than, proportion 2.7kg/dm3, only the 30% of copper, as long as so using aluminium alloy as cable conductor section increase by 58% just
Meet and copper cable identical D.C. resistance.So scaled next, cable conductor is closed using aluminium under the premise of identical traffic capacity
Gold substitutes copper, and weight only has the 48% of copper, can so substantially reduce the vertical lifting load of cable, improve the peace of cable hoisting
Full performance.Conductor 11-1 is aluminium alloy molded line lay configuration simultaneously, is formed using many shoe single line concentric strandings, such to lead
Body structure, substantially increases the utilization rate of effective area under identical appearance size, and this uses aluminium alloy conductor also for satisfaction
Copper conductor is substituted, because resistivity is lifted and causes the increased requirement of cross-sectional area of conductor.Using shoe stranded conductor structure, it will can lead
While body effective cross-section increase, conductor diameter is reduced as far as possible.Using shoe stranded conductor structure, cross-sectional area of conductor fill factor
It can reach 94%.Identical traffic capacity, aluminium alloy conductor external diameter and copper conductor external diameter are very nearly the same.Led in addition using shoe is stranded
Body structure, it is conductor profile more rounding, smooth, it is more beneficial for improving the field effect of conductor.In three insulated wire cores stranding arrangements
Gap filling position, three fan-shaped filling reinforcers 12 are set, and filling reinforcer 12 includes internal carbon fiber rod material
Load carrier 12-1 and the fan-shaped packing 12-2 for extruding the high-strength polyolefin material outside load carrier 12-1, three fans
Shape fill reinforcer 12 together with insulated wire cores stranding into cable conductor 1.Under lifting tension force effect, reinforcer 12 is filled and exhausted
The pressure conversion that the contact surface of edge core 11 is produced carries the gravity of cable into frictional force.It is in steel wire rope to fill reinforcer 12
Or the fan-shaped packing of high-strength polyolefin material formation is extruded on carbon fiber rod, for the metal whirlpool in view of ac transmission
Stream loss, the preferred scheme of the present embodiment is as the load carrier for strengthening filling member using carbon fiber rod.Carbon fiber rod is non-
Metal material, does not produce electromagnetic induction and eddy-current loss.Other intensity is more than steel wire, small by temperature elongation in addition, is lifting
The optimal material of load-bearing.
Because the overall weight of cable is concentrated mainly on conductor, thus for right angle setting requirement crane cable and
Speech, the overall weight for mitigating cable is to improve the main innovation of cable integral hoisting security.But use aluminium alloy conductor conduct
The conductor of fire-resisting cable is pressed in lifting, no matter is considered from the temperature tolerance of conductor or the temperature tolerance of insulating materials, because aluminium alloy
Temperature is heated and softened at 400 DEG C or so；And insulate and use crosslinked polyethylene, it ensures that highest heatproof is under electric property
250℃.It is required for the insulating layer and gear fire bed of cable to stop the high temperature that outside flame and flame zone come and be isolated in electricity
Outside cable, allow cable ensure in a fire the insulation of cable, conductor temperature control within 250 DEG C.The material of thermal insulation cooling layer 3
The formula of material is by weight percentage：EVA (ethylene-vinyl acetate copolymer)：20~30%, LLDPE plastics (linea low density
Polyethylene)：8~15%, AL (OH)3：40~50%, Mg (OH)2：20~30%, it is other：2~5%.The thermal insulation cooling of the present invention
The formula of the material of layer 3 increases AL (OH)3、Mg(OH)2Proportioning fraction, mainly utilize AL (OH)3、Mg(OH)2The knot carried
Brilliant water, in the case where meeting the fiery condition of high temperature, can will crystallize the principle of water cooling, the proportioning fraction for increasing both materials is exactly to be
Give full play to the effect of its cooling.The machinery of the layer material is likely to affect after both certain material mixture ratio fraction increases
Performance.But the Rotating fields do not undertake mechanically stressed in finished cable hoisting process, so the mechanical performance of the Rotating fields
Decline the Lifting Capacity for having no effect on cable.
Gear fire bed 4 is the chain sheathed structure of metal tape, and section is " ∽ " shape, and circle circle interlocks.Keep off the metal tape thickness of fire bed 4
Spend for 0.5mm.Metal tape can make copper strips or aluminum alloy strip, be hung for skyscraper with fire resisting low-smoke halogen-free medium voltage
Fill the lifting characteristic of cable, preferably aluminum alloy strip.To accomplish " ∽ " shape similar as Fig. 2, a circle on sheathed structure
The form that interlocks is enclosed, such structure there are three benefits, 1. such sheathed structure rounding, and small to internal pressure, it is possible to
Preferably protect internal structure；2. such sheathed structure bending is easier, from structure for, be the circle of fellow villagers two during bending
Between rotation, so bending radius is small, be conducive to mounting and installation；3. such ripple struction is more beneficial for radiating effect, so
Before by fire, good radiating is conducive to cable current capacity.During by fire, be conducive to flame temperature being delivered to ripple armouring
During layer, heat can be distributed to surrounding in time and intimately being measured for armor is reduced, even if so such structure uses heatproof
Only 600 DEG C or so of aluminum alloy strip also can keep original mechanical and physical property at a temperature of 900 DEG C of experiment flame.Keep off fire bed 4
Internal diameter than thermal insulation cool layer 3 the big 1~3mm of internal diameter.
If cable needs to have fire resistance characteristic, the oversheath of a strata olefin material can also be extruded outside armor,
For waterproof requirement.
Its production technology, including following steps：
(1) aluminium alloy rod is frictionally heated to semi-molten state, then squeezed by the mould designed according to conductor size shape
The shoe conductor monofilament of corresponding size is pressed into, then these conductor monofilament are wrapped in one according to the position where design each
Stranded molded line concentric stranding conductor 11-1 on heart circle monofilament.
(2) extruded simultaneously outside conductor 11-1 conductor shielding 11-2, insulation 11-3, tri- layers of completions of insulation shielding 11-4 it is exhausted
Edge structure.
(3) the wrapped metal screen layer 11-4 outside insulation shielding 11-4.
(4) processing technology of filling reinforcer 12 is that fan is extruded on the load carrier 12-1 of steel wire rope or carbon fiber rod
The high-strength polyolefin material of shape forms fan-shaped packing 12-2, and fan shape is realized by extrusion die, the shape root of mould
According to the tangent design of the size of cable insulation core, two cambered surfaces of sector filling thoroughly do away with edge close contact with two respectively.
(5) by three insulated wire cores 11, twisted synthesizing cable is into circular cable core 1 together with three are filled reinforcers 12, and using high
Strength polyolefin band tightens composition binding strap 2.
(6) after binding strap 2 is tightened, extrusion is by weight percentage：EVA：20~30%, LLDPE plastics：8~15%,
AL(OH)3：40~50%, Mg (OH) 2：20~30%, it is other：The insulating layer 3 of 2~5% material formation constituted；Extrusion equipment
Screw rod using etc. deep low compression ratio screw rod, extrusion die is not more than 35 ° of plsitive mold using extrusion angle；Insulating layer 3 is squeezed
Go out to have produced not upper disk after the cooling of entrance tank, be directly entered the chain armouring process of gear fire bed 4, treat after the completion of armouring process again
Upper disk circulation.
(7) processing of gear fire bed 4 uses copper strips or aluminium alloy strips, and the control of armouring size is it is ensured that armor internal diameter
Slightly larger than 1~3mm of external diameter of insulating layer.
(8) oversheath of a strata olefin material is extruded outside armor.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail it is bright, should be understood that the foregoing is only the present invention specific embodiment, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (1)
1. a kind of skyscraper production technology of fire resisting low-smoke halogen-free medium voltage crane cable, it is characterised in that：Including following step
Suddenly：
Step 1: aluminium alloy rod is frictionally heated into semi-molten state, then squeezed by the mould designed according to conductor size shape
The shoe conductor monofilament of corresponding size is pressed into, then these conductor monofilament are wrapped in one according to the position where design each
Stranded molded line concentric stranding conductor (11-1) on heart circle monofilament；
Step 2: extruding conductor shielding (11-2), insulation (11-3), three layers of insulation shielding (11-4) simultaneously outside in conductor (11-1)
The insulation system of completion；
Step 3: outside the insulation shielding (11-4) wrapped metal screen layer (11-5)；
Step 4: the processing technology of filling reinforcer (12) is squeezed on the load carrier (12-1) of steel wire rope or carbon fiber rod
The high-strength polyolefin material for going out sector forms fan-shaped packing (12-2), and fan shape is realized by extrusion die, mould
Shape thoroughly does away with edge close contacts with two respectively according to the tangent design of size of cable insulation core, two cambered surfaces of sector filling,
The section fill factor of the conductor (11-1) is 94%；
Step 5: by three insulated wire cores (11) together with three are filled reinforcers (12) twisted synthesizing cable into circular cable core (1), and
Composition binding strap (2) is tightened using high-strength polyolefin band；The filling reinforcer (12) includes internal carbon fiber bar
The load carrier (12-1) of matter and the fan-shaped packing for extruding the high-strength polyolefin material outside load carrier (12-1)
(12-2)；
Step 6: after binding strap (2) is tightened, extrusion is by weight percentage：EVA：20~30%, LLDPE plastics：8~
15%th, AL (OH)3：40~50%, Mg (OH)2：20~30%, it is other：The insulating layer (3) of 2~5% material formation constituted；Institute
The deep low compression ratio screw rod such as the screw rod use of extrusion equipment is stated, extrusion die is not more than 35 ° of plsitive mold using extrusion angle；
Not upper disk after the complete entrance tank cooling of insulating layer (3) extrusion, is directly entered the chain armouring process of gear fire bed (4), treats armour
Fill upper disk circulation again after the completion of process；
Step 7: the processing of gear fire bed (4) uses copper strips or aluminium alloy strips, the control of armouring size is it is ensured that in armor
Footpath is slightly larger than 1~3mm of external diameter of insulating layer；The metal tape thickness of the gear fire bed (4) is 0.5mm；
Step 8: extruding the oversheath of a strata olefin material outside armor.
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| CN104637608A (en) * | 2013-11-14 | 2015-05-20 | 成都捷康特科技有限公司 | Cooling cable |
| CN103617837B (en) * | 2013-11-28 | 2015-03-04 | 湖北龙腾红旗电缆(集团)有限公司 | Medium-voltage lifting power cable for high-rise and super-high-rise mansions |
| CN104008800A (en) * | 2014-04-23 | 2014-08-27 | 晶锋集团股份有限公司 | Shock-absorption cable |
| CN106024188A (en) * | 2016-07-06 | 2016-10-12 | 远东电缆有限公司 | Self-support type building hoisting intelligent medium-voltage power cable and manufacturing method thereof |
| CN107134309A (en) * | 2017-06-22 | 2017-09-05 | 江苏华亚电缆有限公司 | High conductivity high flame resistance, low smoke halogen-free cable |
| CN108010613A (en) * | 2017-11-28 | 2018-05-08 | 安徽恒晶电缆集团有限公司 | A kind of polyvinyl chloride insulation high-temperature-resistant power cable of bending resistance pressure |
| CN107993761A (en) * | 2017-11-28 | 2018-05-04 | 安徽恒晶电缆集团有限公司 | A kind of fluoroplastic insulated high-temperature-resistant power cable |
| CN109346237B (en) * | 2018-09-30 | 2020-11-17 | 远东电缆有限公司 | Medium-voltage hoisting cable for super high-rise building and production and installation process thereof |
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Address after: No. 8, Gaocheng Town, Yixing city of Jiangsu Province, Wuxi City, the Far East Avenue 214257 Applicant after: FAR EAST CABLE Co.,Ltd. Applicant after: NEW FAR EAST CABLE Co.,Ltd. Applicant after: FAR EAST COMPOSITE TECHNOLOGY Co.,Ltd. Address before: No. 8, Gaocheng Town, Yixing city of Jiangsu Province, Wuxi City, the Far East Avenue 214257 Applicant before: FAR EAST CABLE Co.,Ltd. Applicant before: NEW FAR EAST CABLE Co.,Ltd. Applicant before: FAR EAST COMPOSITE TECHNOLOGY Co.,Ltd. |
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Application publication date: 20130925 Assignee: Far East New Materials Co.,Ltd. Assignor: FAR EAST CABLE Co.,Ltd. Contract record no.: X2023980042759 Denomination of invention: Fire resistant low smoke and halogen-free medium voltage hoisting cables and their production process for high-rise buildings Granted publication date: 20170926 License type: Common License Record date: 20230928 |