CN105957609A - Medium-voltage hoisting fire-resistant cable and preparation method thereof - Google Patents
Medium-voltage hoisting fire-resistant cable and preparation method thereof Download PDFInfo
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- CN105957609A CN105957609A CN201610430011.2A CN201610430011A CN105957609A CN 105957609 A CN105957609 A CN 105957609A CN 201610430011 A CN201610430011 A CN 201610430011A CN 105957609 A CN105957609 A CN 105957609A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/221—Sheathing; Armouring; Screening; Applying other protective layers filling-up interstices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
- H01B13/2613—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping by longitudinal lapping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1895—Internal space filling-up means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
- H01B7/221—Longitudinally placed metal wires or tapes
- H01B7/225—Longitudinally placed metal wires or tapes forming part of an outer sheath
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/292—Protection against damage caused by extremes of temperature or by flame using material resistant to heat
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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Abstract
The invention provides a medium-voltage hoisting fire-resistant cable, which comprises multiple strands of wire cores, wherein the outside of the wire cores is filled with a fireproof layer provided with steel wires; a first fire-resistant layer, a low-smoke halogen-free inner sheath, one fire-barrier layer, aluminum alloy wires, a second fire-resistant layer, a stainless steel band, a third fire-resistant layer, the other fire-barrier layer, a fourth fire-resistant layer and a flame-retardant outer sheath are sequentially arranged outside the fireproof layer. The invention further provides a preparation method of the cable. The method comprises the following steps of: firstly, arranging the steel wires into spaced gaps among the wire cores and forming the cable; secondly, coating the outside of the wire cores with the fireproof layer, wrapping the fireproof layer with the first fire-resistant layer, coating the first fire-resistant layer with the inner sheath in an extruding manner and coating the inner sheath with one fire-barrier layer, wrapping the fire-barrier layer with the stainless steel band and the second fire-resistant layer, coating the second fire-resistant layer with the other fire-barrier layer and the third fire-resistant layer; and finally coating the outside of the fourth-resistant layer at the outer side with the outer sheath in an extruding manner. By the technical scheme, the time of conducting heat to the inside of the cores of the cable can be greatly prolonged; the withstand voltage insulation performance and the conductivity of a conductor are improved; the tensile strength is high; and the medium-voltage hoisting fire-resistant cable can be applied to hanging laying of high-rise buildings.
Description
Technical field
The present invention relates to technical field of cable, particularly pressure lifting fire-resisting cable and preparation side thereof in one
Method.
Background technology
Along with the high speed development of economic society, skyscraper gets more and more, and power consumption is big, and through-put power is big,
Especially needed Large Copacity midium voltage cable, and skyscraper plot ratio is high, population density is big, skyscraper electric power
Cable is because being affected by complicated natural cause and anthropic factor electric power accident is easily occurred.
Main cable in skyscraper uses vertical run, therefore usual cable longitudinal pulling force to be born mostly.
This structural cable weight is big, and periphery fixation with steel wire is difficult, and difficulty of construction is big, and can cause cable heat radiation difficulty,
Therefore cause current-carrying capacity relatively reduced so that cable cost improves, armored cable external diameter a larger increase cable
Material usage, also resulting in cable cost increases.Simultaneously in order to make electric power accident will not cause fire, or
Suffering fire power cable will not be made to lead to secondary accident in the case of destroying, this just requires mesohigh electric power electricity
Cable needs have reliable fire-resistant function, also requires that cable can bear longitudinally huge pulling force.
Summary of the invention
It is an object of the invention to overcome the defect of prior art, it is provided that a kind of tension is durable, can high-rise hanging
Lay, the middle pressure of fireproof lifts fire-resisting cable and preparation method thereof.
For achieving the above object, present invention employs following technical scheme:
In one, pressure lifting fire-resisting cable, including multiply core 1, is filled with fireprotection layer outside described core 1
71, it is provided with outside in described fireprotection layer 71 and extrudes the high-tensile steel wires 10 of low smoke and zero halogen sheath 11, fire prevention
The outer wrapped first fireproof heat-insulating layers 81 of layer 71, the outer wrap of described first fireproof heat-insulating layer 81 have low cigarette without
Halogen inner sheath 9, the outside of described low smoke and zero halogen inner sheath 9 is provided with gear fire bed 72, in described gear fire bed 72
Being provided with aluminum-alloy wire 12, the outer wrapped second fireproof heat-insulating layer 82 of gear fire bed 72, at the second fireproof heat-insulating
Layer 82 is externally provided with stainless steel band 13, and the outside of described stainless steel band 13 is also surrounded with the 3rd fireproof heat-insulating layer
83, the 3rd fireproof heat-insulating layer 83 is externally provided with gear fire bed 73, and the outside of described gear fire bed 73 is resistance to further around bag the 4th
Fire heat insulation layer 84, is extruded with fire-retardant oversheath 14 in the outside of the 4th fireproof heat-insulating layer 84.
Optionally, per share core 1 includes that conductor 15, the outside of described conductor 15 are extruded with insulating barrier 3, institute
State insulating barrier 3 outside around being surrounded by metal screen layer 5, and the outside of per share core 1 is extruded with low smoke and zero halogen
Oversheath 6.
Optionally, per share core 1 includes that conductor 15, the outside of described conductor 15 are extruded with conductor screen successively
Cover layer 2, insulating barrier 3 and insulation screen 4, described insulation screen 4 outside around being surrounded by metal screen layer
5, and the outside of per share core 1 is extruded with low smoke and zero halogen oversheath 6, described conductor shield 2 and insulation
Screen layer 4 is semi-conductive shield.
Optionally, described fireprotection layer 71 is the inorganic compound extrusion interstitital texture having and releasing water for cooling characteristic
Layer, the critical temperature range that water for cooling is released in its decomposition is 150 DEG C to 250 DEG C.
Optionally, described flame retardant bed 73 is the inorganic compound extrusion having and releasing water for cooling and sintered body characteristic
Interstitital texture layer, it releases the critical temperature range of water for cooling between 300 DEG C to 400 DEG C.
Optionally, described fireprotection layer 71, gear fire bed 72, flame retardant bed 73 are that magnesium hydroxide inorganic compound is filled out
Fill layer.
Optionally, the inorganic mineral metal hydrate in described magnesium hydroxide inorganic compound packed layer includes silicon
Acid sodium, magnesium hydroxide and cementing agent.
Optionally, first fireproof heat-insulating layer the 81, second fireproof heat-insulating layer the 82, the 3rd fireproof heat-insulating layer 83 and
4th fireproof heat-insulating layer 84 is fireproofing inorganic inhibiting tape；Fire-retardant oversheath 14 is fire prevention polyolefin oversheath.
A kind of middle pressure lifting fire-resisting cable preparation method, including with
Lower step,
Step A. arranges outside in the alternate space of three cores being triangularly arranged 1 and extrudes low smoke and zero halogen
The high-tensile steel wires 10 of sheath 11, and by high-tensile steel wires 10 and core 1 stranding, make single core；
Step B., by clad magnesium hydroxide inorganic compound outside cable core, forms fireprotection layer 71；
Step C. is wrapped first fireproof heat-insulating layer 81 outside fireprotection layer 71, refractory insulating layer in being formed；
Step D. extrudes low smoke and zero halogen inner sheath 9 outside the first fireproof heat-insulating layer 81, at low smoke and zero halogen inner sheath
9 external aluminum-alloy wire 12 armourings, and it is coated with gear fire bed 72, at outer wrapped second fireproof heat-insulating of gear fire bed 72
Layer 82；
The outer wrapped stainless steel band 13 of step E. the second fireproof heat-insulating layer 82, outer further around bag the at stainless steel band 13
Three fireproof heat-insulating layers 83, at the 3rd fireproof heat-insulating layer 83 outer cladding flame retardant bed 73, outer the most wrapped at flame retardant bed 73
4th fireproof heat-insulating layer 84；
Step F. extrudes fire-retardant oversheath 14 outside the fireproof heat-insulating layer 84 of outside the 4th.
Optionally, wherein in step A, the preparation method of core 1 comprises the following steps,
Step a. uses three-layer co-extruded technique to extrude conductor shield 2, absolutely from inside to outside in the outside of conductor 15
Edge layer 3 and insulation screen 4；
Step b. is at the outer wrapped metal screen layer 5 of insulation screen 4
The middle pressure lifting fire-resisting cable of the present invention uses technique scheme, fire-retardant, adiabatic, fire-resistant by collection,
Fire insulation adds the adiabatic fire insulation functional layer outside adiabatic flame retardant bed composition in the fire-retardant oversheath of one, collection lower the temperature,
Heat insulation, armouring in the second fireproof heat-insulating layer of one add the gear fire bed of cooling and insulating armouring constitute in the middle of cooling,
Heat insulation and armouring functional layer, by integrating cooling, the reducing temperature for preventing fire bed of fire insulation adds interior first fireproof heat-insulating layer
Cooling fire prevention functional layer within Gou Chenging, can significantly extend and be thermally conducted in middle pressure hanging fireproof cable cable core
Time so that it is the performance of pressure insulation and conductor conduction gets a promotion, and also it is high to have tensile strength,
Can be used for the characteristic that skyscraper hanging is laid.
The preparation method of the present invention, on the premise of effectively guaranteeing fireproofing of cable heat resistance, reduces and produces
Difficulty of processing, and ensure that the current-carrying capacity and suitable external diameter that cable is bigger, it is simple to install and lay.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of pressure lifting fire-resisting cable in the present invention.
In figure: 1-core, 2-conductor shield, 3-insulating barrier, 4-insulation screen, 5-metal screen layer,
6-low smoke and zero halogen oversheath, 71-fireprotection layer, 72-gear fire bed, 73-flame retardant bed, 81-the first fireproof heat-insulating layer,
In 82-the second fireproof heat-insulating layer, 83-the 3rd fireproof heat-insulating layer, 84-the 4th fireproof heat-insulating layer, 9-low smoke and zero halogen
Sheath, 10-high-tensile steel wires, 11-low smoke and zero halogen sheath, 12-aluminum-alloy wire, 13-stainless steel band, 14-hinder
Combustion oversheath, 15-conductor.
Detailed description of the invention
Provide embodiments of the invention below in conjunction with accompanying drawing, further illustrate the middle pressure lifting flame proof electrical of the present invention
Cable and preparation method thereof detailed description of the invention.Middle pressure lifting fire-resisting cable of the present invention and preparation method thereof does not limits
In the following description.
As it is shown in figure 1, the middle pressure lifting fire-resisting cable of the present invention includes multiply core 1, described core 1
It is filled with outward fireprotection layer 71, is provided with outside in described fireprotection layer 71 and extrudes the high-strength of low smoke and zero halogen sheath 11
Degree steel wire 10, the outer wrapped first fireproof heat-insulating layer 81 of fireprotection layer 71, described first fireproof heat-insulating layer 81
Outer wrap has low smoke and zero halogen inner sheath 9, the outside of described low smoke and zero halogen inner sheath 9 to be provided with gear fire bed 72,
It is provided with aluminum-alloy wire 12 in described gear fire bed 72, keeps off the outer wrapped second fireproof heat-insulating layer 82 of fire bed 72,
Being externally provided with stainless steel band 13 at the second fireproof heat-insulating layer 82, the outside of described stainless steel band 13 is also surrounded with
Three fireproof heat-insulating layers 83, the 3rd fireproof heat-insulating layer 83 is externally provided with gear fire bed 73, outside described gear fire bed 73
Portion, further around bag the 4th fireproof heat-insulating layer 84, is extruded with fire-retardant oversheath in the outside of the 4th fireproof heat-insulating layer 84
14.The present invention uses technique scheme, by integrate fire-retardant, adiabatic, fire-resistant, fire insulation fire-retardant outside
Sheath 14 adds adiabatic flame retardant bed 73 and constitutes the adiabatic fire insulation functional layer of outside, by collection cooling, heat insulation, armouring
In one the second fireproof heat-insulating layer 82 add cooling and insulating armouring gear fire bed 72 constitute centre cooling, every
Heat and armouring functional layer, by integrating cooling, the reducing temperature for preventing fire bed 71 of fire insulation adds interior first fireproof heat-insulating
Cooling fire prevention functional layer within layer 81 composition, can significantly extend and be thermally conducted to middle pressure hanging fireproof cable
Time in cable core so that it is the performance of pressure insulation and conductor conduction gets a promotion and also has tensile strength
Height, can be used for the characteristic that skyscraper hanging is laid.
The outside of per share core 1 is extruded with low smoke and zero halogen oversheath 6, is provided with high-strength between multiply core 1
Degree steel wire 10, so that cable has higher tensile strength, extrudes low outside described high-tensile steel wires 10
Cigarette Halogen sheath 11, is provided with fireprotection layer 71 in the gap after core 1 and high-tensile steel wires 10 stranding, fire prevention
Layer 71 is the inorganic compound extrusion interstitital texture layer having and releasing water for cooling characteristic, and water for cooling is released in its decomposition
Critical temperature range is 150 DEG C to 250 DEG C.Extrude low smoke and zero halogen inner sheath 9 outside fireprotection layer 71, close with aluminum
Spun gold 12 armouring, and it is coated with gear fire bed 72, so that cable can be used for skyscraper hanging and lays, stainless
Steel band 13 keeps off the outside of fire bed 72 around wrapping in, and is coated with flame retardant bed 73, institute in the outside of stainless steel band 13
Fire-retardant oversheath 14 it is extruded with outside the flame retardant bed 73 stated, and at fireprotection layer 71, gear fire bed 72, flame retardant bed
73 and stainless steel band 13 outside be surrounded with fireproof heat-insulating layer, so that this cable can meet skyscraper
Need, there is again fire prevention, gear fire, the characteristic of back-fire relief.
Described fireprotection layer 71, gear fire bed 72, that the fire proofing material of flame retardant bed 73 preferably employs magnesium hydroxide is inorganic
Compound, forms magnesium hydroxide inorganic compound packed layer, and it is a kind of with magnesium hydroxide as main material
Inorganic compound.Start to decompose the characteristic discharging water of crystallization when 350 DEG C by magnesium hydroxide, can be effective
Play the effect releasing water for cooling.Sinter the magnesium oxide of solid into additionally by chemical reaction, can effectively play every
Hot fireproof effect.Wherein the fire proofing material of flame retardant bed 73 is not excluded for selecting other inorganic compound, but it
Need to have and release the characteristic of water for cooling and sintered body has heat insulation feature, flame retardant bed 73 releases the critical of water for cooling
Temperature releases the critical temperature of water for cooling more than fireprotection layer 71, and it releases the critical temperature range of water for cooling at 300 DEG C
Between 400 DEG C, differ about 150 DEG C to be formed with the critical temperature releasing water for cooling of reducing temperature for preventing fire bed 71,
Make the gear fire bed 72 being in the cooling and insulating armouring of centre can start cooling at a higher temperature, to extend
The fiery time with heat affecting to reducing temperature for preventing fire bed 71.Nothing in described magnesium hydroxide inorganic compound packed layer
Machine mineral metal hydrate mainly includes sodium silicate, magnesium hydroxide, cementing agent.Wherein sodium silicate has cementing
Effect, CO in atmosphere2Effect under, SiO can be separated out from solution2Colloid: NaO mSiO2+CO2+nH2O
=NaCO3+mSiO2·nH2O；The colloid SiO separated out2It is the SiO of a kind of nascent state2, there is great activity,
They are wrapped in segmentation around, stick to aggregate surface and are bonded together by magnesium hydroxide particle.Cementing agent can
To use bath of glass or similar cementing agent, its cladding bond effect can be increased.Magnesium hydroxide particle constantly absorbs water
While, SiO2 aqueous colloidal constantly reduces, and gel gradually concentrates, the most cementing at magnesium hydroxide particle
Surface, so that material becomes an entirety.From the chemistry knot of molecular structure this metal hydrate of angle analysis
Structure is as follows: sodium silicate solution space multistory chemical constitution is determined by Si-O covalent bond, and Si atom is just positioned at
Tetrahedral elementary cell mechanism SiO4 4-, these basic structural units can be combined into by the way of different
Chain, ring-type, stratiform and the anion of lattice structure, these aniones pass through metallic sodium ion it
Couple together formation chain structure, SiO4 4-Positive tetrahedron forms difference by sharing different oxygen atomicities
The anion of silica group, such as SiO4 4-、Si2O7 2-、Si3O6 6-、Si6O18 12-Deng, addition magnesium hydroxide,
After cementing agent, molecule is become three dimensional structure from line style, face type, the three-dimensional netted knot that the molecular structure of formation is similar
Structure.This structure sheaf gradually discharges the dissociating water molecule in this Rotating fields when 350 DEG C of temperature below, free
During hydrone release, evaporative cooling, delay cable internal temperature rise.When evaporating totally Deng dissociating water molecule,
This Rotating fields becomes porous network structure.When porous network structure temperature rises to 350 DEG C, wherein magnesium hydroxide
Proceed by chemical reaction, discharge crystalline water molecules.Due to its insulation heat insulating function of porous network structure,
Delay magnesium hydroxide generation chemical reaction, delay crystalline water molecules to evaporate simultaneously.Make this Rotating fields hydrone with
The speed of the evaporation of temperature-time becomes the thermal insulation of holey framing structure, fire material before 350 DEG C, enters
One step plays isolation burning things which may cause a fire disaster, delays cable internal structure temperature rise, and the loose structure concurrently formed can adsorb
Flue gas in combustion process.
A kind of embodiment of the core 1 in the present invention is, per share core 1 includes conductor 15, described conductor 15
Outside be extruded with insulating barrier 3, described insulating barrier 3 outside around being surrounded by metal screen layer 5.
The another kind of embodiment of the core 1 in the present invention is, per share core 1 includes conductor 15, described conductor
The outside of 15 is extruded with conductor shield 2, insulating barrier 3 and insulation screen 4, described insulation shielding successively
Layer 4 outside around being surrounded by metal screen layer 5, described conductor shield 2 and insulation screen 4 are partly to lead
Body screen layer, thus ensure that the current-carrying capacity of cable and make cable be prone to heat radiation.First fireproof heat-insulating layer
81, the second fireproof heat-insulating layer the 82, the 3rd fireproof heat-insulating layer 83 and the 4th fireproof heat-insulating layer 84 are fireproofing inorganics
Inhibiting tape, fire-retardant oversheath 14 is fire prevention polyolefin oversheath, thus is not increasing the outside diameter of cable as far as possible
Under premise, reduce the cost of cable.
Present invention additionally comprises the preparation method of a kind of middle pressure lifting fire-resisting cable, comprise the following steps:
Step A. arranges outside in the alternate space of three cores being triangularly arranged 1 and extrudes low smoke and zero halogen
The high-tensile steel wires 10 of sheath 11, and by high-tensile steel wires 10 and core 1 stranding, make single core；
Step B., by clad magnesium hydroxide inorganic compound outside cable core, forms fireprotection layer 71；
Step C. is wrapped first fireproof heat-insulating layer 81 outside fireprotection layer 71, refractory insulating layer in being formed；
Step D. extrudes low smoke and zero halogen inner sheath 9 outside the first fireproof heat-insulating layer 81, at low smoke and zero halogen inner sheath
9 external aluminum-alloy wire 12 armourings, and it is coated with gear fire bed 72, at outer wrapped second fireproof heat-insulating of gear fire bed 72
Layer 82；
The outer wrapped stainless steel band 13 of step E. the second fireproof heat-insulating layer 82, outer further around bag the at stainless steel band 13
Three fireproof heat-insulating layers 83, at the 3rd fireproof heat-insulating layer 83 outer cladding flame retardant bed 73, outer the most wrapped at flame retardant bed 73
4th fireproof heat-insulating layer 84；
Step F. extrudes fire-retardant oversheath 14 outside the fireproof heat-insulating layer 84 of outside the 4th.
Preferably, the preparation method of core 1 in step, comprise the following steps:
Step a. uses three-layer co-extruded technique to extrude conductor shield 2, absolutely from inside to outside in the outside of conductor 15
Edge layer 3 and insulation screen 4；
Step b. is at the outer wrapped metal screen layer 5 of insulation screen 4.
The preparation method of the present invention, on the premise of effectively guaranteeing fireproofing of cable heat resistance, reduces and produces
Difficulty of processing, and ensure that the current-carrying capacity and suitable external diameter that cable is bigger, it is simple to install and lay.
Middle pressure hanging fire-resisting cable in the present invention, the structure such as its insulation, filling, sheath is low smoke and zero halogen
Material, cable is low smoke and zero halogen environment-friendly cable.When fire met by cable, due to its fire retardant jacket, inorganic mineral
Metal hydrate will not make cable internal temperature too high in the cooling refuge floor short time, thus cable can be preferable
Ground adapts to the use needs to flame-retardant class requirement high field institute, and rational in infrastructure, reliability height.
Above content is to combine concrete preferred implementation further description made for the present invention, no
Can assert the present invention be embodied as be confined to these explanations.Common for the technical field of the invention
For technical staff, without departing from the inventive concept of the premise, it is also possible to make some simple deductions or replace
Change, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a pressure lifting fire-resisting cable in, including multiply core (1), it is characterised in that: described line
Be filled with fireprotection layer (71) outside core (1), be provided with in described fireprotection layer (71) outside extrude low cigarette without
The high-tensile steel wires (10) of halogen sheath (11), the most wrapped first fireproof heat-insulating layer (81) of fireprotection layer (71),
The outer wrap of described first fireproof heat-insulating layer (81) has low smoke and zero halogen inner sheath (9), described low cigarette without
The outside of halogen inner sheath (9) is provided with gear fire bed (72), is provided with aluminium alloy in described gear fire bed (72)
Silk (12), the outer wrapped second fireproof heat-insulating layer (82) of gear fire bed (72), at the second fireproof heat-insulating layer
(82) being externally provided with stainless steel band (13), it is fire-resistant that the outside of described stainless steel band (13) is also surrounded with the 3rd
Heat insulation layer (83), the 3rd fireproof heat-insulating layer (83) is externally provided with gear fire bed (73), described gear fire bed (73)
Outside further around bag the 4th fireproof heat-insulating layer (84), be extruded with in the outside of the 4th fireproof heat-insulating layer (84)
Fire-retardant oversheath (14).
Middle pressure lifting fire-resisting cable the most according to claim 1, it is characterised in that: per share core (1)
Including conductor (15), the outside of described conductor (15) is extruded with insulating barrier (3), described insulating barrier (3)
Outside around being surrounded by metal screen layer (5), and the outside of per share core (1) is extruded with outside low smoke and zero halogen and protects
Set (6).
Middle pressure lifting fire-resisting cable the most according to claim 1, it is characterised in that: per share core (1)
Including conductor (15), the outside of described conductor (15) is extruded with conductor shield (2), insulating barrier successively
And insulation screen (4) (3), described insulation screen (4) outside around being surrounded by metal screen layer (5),
And the outside of per share core (1) is extruded with low smoke and zero halogen oversheath (6), described conductor shield (2)
It is semi-conductive shield with insulation screen (4).
Middle pressure lifting fire-resisting cable the most according to claim 3, it is characterised in that: described fireprotection layer (71)
Being the inorganic compound extrusion interstitital texture layer having and releasing water for cooling characteristic, it decomposes the stagnation temperature releasing water for cooling
Degree scope is 150 DEG C to 250 DEG C.
Middle pressure lifting fire-resisting cable the most according to claim 1, it is characterised in that: described flame retardant bed (73)
Being the inorganic compound extrusion interstitital texture layer having and releasing water for cooling and sintered body characteristic, it releases facing of water for cooling
Boundary's temperature range is between 300 DEG C to 400 DEG C.
Middle pressure lifting fire-resisting cable the most according to claim 1, it is characterised in that: described fireprotection layer (71),
Gear fire bed (72), flame retardant bed (73) are magnesium hydroxide inorganic compound packed layers.
Middle pressure lifting fire-resisting cable the most according to claim 6, it is characterised in that: described magnesium hydroxide
Inorganic mineral metal hydrate in inorganic compound packed layer is mainly by sodium silicate, magnesium hydroxide, cementing agent
Composition.
Middle pressure lifting fire-resisting cable the most according to claim 1, it is characterised in that: the first fireproof heat-insulating
Layer (81), the second fireproof heat-insulating layer (82), the 3rd fireproof heat-insulating layer (83) and the 4th fireproof heat-insulating layer
(84) it is fireproofing inorganic inhibiting tape；Fire-retardant oversheath (14) is fire prevention polyolefin oversheath.
9. the preparation method of pressure lifting fire-resisting cable in a kind, it is characterised in that: comprise the following steps,
Step A. arranges outside in the alternate space of three cores being triangularly arranged (1) and extrudes low cigarette
The high-tensile steel wires (10) of Halogen sheath (11), and high-tensile steel wires (10) are become with core (1)
Cable, makes single core；
Step B., by clad magnesium hydroxide inorganic compound outside cable core, forms fireprotection layer (71)；
Step C. is at the wrapped first fireproof heat-insulating layer (81) in fireprotection layer (71) outside, refractory insulating layer in being formed；
Step D. extrudes low smoke and zero halogen inner sheath (9), at low smoke and zero halogen outside the first fireproof heat-insulating layer (81)
Inner sheath (9) external aluminum-alloy wire (12) armouring, and it is coated with gear fire bed (72), at gear fire bed (72)
The most wrapped second fireproof heat-insulating layer (82)；
Step E. the second fireproof heat-insulating layer (82) the most wrapped stainless steel band (13), at stainless steel band (13) outward
Further around bag the 3rd fireproof heat-insulating layer (83), at the 3rd fireproof heat-insulating layer (83) outer cladding flame retardant bed (73),
At the most wrapped 4th fireproof heat-insulating layer (84) of flame retardant bed (73)；
Step F. extrudes fire-retardant oversheath (14) outside outside the 4th fireproof heat-insulating layer (84).
The preparation method of middle pressure lifting fire-resisting cable the most according to claim 9, it is characterised in that: its
In middle step A, the preparation method of core (1) comprises the following steps,
Step a. use three-layer co-extruded technique extrude from inside to outside in the outside of conductor (15) conductor shield (2),
Insulating barrier (3) and insulation screen (4)；
Step b. is at insulation screen (4) the most wrapped metal screen layer (5).
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| CN201610430011.2A CN105957609B (en) | 2016-06-16 | 2016-06-16 | Middle pressure lifting fire-resisting cable and preparation method thereof |
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| CN109949997A (en) * | 2019-04-25 | 2019-06-28 | 佛山市宏图中宝电缆有限公司 | Fire-resisting cable is pressed in one kind |
| CN111540525A (en) * | 2020-05-26 | 2020-08-14 | 安徽太平洋电缆股份有限公司 | Heat-insulating bottle type B1-grade light fireproof cable |
| CN113274668A (en) * | 2021-05-27 | 2021-08-20 | 唐山师范学院 | Cable overload protection device for communication network capable of preventing fire |
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| Publication number | Publication date |
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| CN105957609B (en) | 2017-10-10 |
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Denomination of invention: Medium voltage hoisting fire-resistant cable and its preparation method Effective date of registration: 20221013 Granted publication date: 20171010 Pledgee: Wuwei branch of China Co truction Bank Corp. Pledgor: ANHUI PACIFIC CABLE Co.,Ltd. Registration number: Y2022980018217 |
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