CN104681187A - Fire-resistant power cable for large-scale oceangoing vessels - Google Patents
Fire-resistant power cable for large-scale oceangoing vessels Download PDFInfo
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- CN104681187A CN104681187A CN201310608067.9A CN201310608067A CN104681187A CN 104681187 A CN104681187 A CN 104681187A CN 201310608067 A CN201310608067 A CN 201310608067A CN 104681187 A CN104681187 A CN 104681187A
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Abstract
The invention provides a fire-resistant power cable for large-scale oceangoing vessels. The fire-resistant power cable comprises insulating wire cores of which each is coated with an insulation shielding layer and a copper wire braided shielding layer. The multiple insulating wire cores form a cable core which is filled with a flame-retardant cooling material filling layer. The cable core is sequentially coated with an oxygen-insulation cooling inner sheath layer, a heat-insulation wrapping layer, a fire barrier layer, and a flame-retardant outer sheath layer. The flame-retardant cooling material filling layer is a rock wool rope layer. The oxygen-insulation cooling inner sheath layer is an oxygen-insulation cooling layer which is formed by kneading magnesium hydroxide or aluminum hydroxide and zinc borate by taking butyl rubber as a matrix. With the fire-resistant power cable for large-scale oceangoing vessels provided by the invention, the problem that a fire-resistant effect cannot be achieved due to the fact that an air gap is easily formed between a conductor and an insulating layer can be solved, the insulating layers of the insulating wire cores is ensured not to be softened, and the fireproof power cable has good fire-resistant capability.
Description
Technical field
The present invention relates to a kind of fireproof power cable, particularly relate to a kind of large-scale ocean marine fire-resistant power cable.
Background technology
The electric pressure of 0.6/1kV and following fireproof power cable generally adopts wrapped fire-resistant isinglass belt on conductor, mica tape is formed by mica paper, alkali-free glass fiber cloth and silicate salt-type binders manufacture, generate insoluble not molten stiff shell after meeting fire, thus reach fire-resistant object.
Shortcoming/the deficiency of prior art:
The structure of the crosslinked polyetylene insulated fireproof power cable of 6kV is that the electric parameter run under voltage by it determines, insulated wire cores is made up of conductor, conductor screen, insulation and insulation shielding etc.Manufacture fireproof power cable, can not take the mode of tradition wrapped fire-resistant isinglass belt on conductor, otherwise easily form air gap between conductor and insulating barrier, conductive surface electric field also can be concentrated, and causes cable operationally to puncture, and does not also have fire-resistant effect in addition.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of large-scale ocean marine fire-resistant power cable, the easy problem forming air gap and cause not having fire-resistant effect between conductor and insulating barrier can be solved, realize ensureing that the insulating barrier of insulated wire cores does not soften, there is good refractory ability.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of large-scale ocean marine fire-resistant power cable, comprise the insulated wire cores being enclosed with insulation screen and proof copper-wire braided screen, many insulated wire cores form cable core, cable core inside is filled with fire-retardant cooling material packed layer, and cable core is enclosed with oxygen barrier cooling inner restrictive coating, heat insulation lapping layer, gear fire bed and fire-retardant external sheath layer outward successively.
Insulated wire cores is made up of the conductor shield of copper conductor and copper conductor outer wrapping and insulating barrier.
Insulating barrier is crosslinked polyetylene insulated layer.
Fire-retardant cooling material packed layer is mineral wool rope layer.
Heat insulation lapping layer is phenolic aldehyde/asbestos butyronitrile band.
Gear fire bed is wrinkle copper sheath.
Oxygen barrier cooling inner restrictive coating is take butyl rubber as the oxygen barrier cooling layer that matrix has been mediated magnesium hydroxide or aluminium hydroxide and added Firebrake ZB.
Fire-retardant external sheath layer is low smoke halogen-free flame-retardant polyolefin layer.
The quantity of insulated wire cores is three.
Large-scale ocean provided by the invention marine fire-resistant power cable, adopt the fireproof construction that fire-retardant cooling material packed layer, oxygen barrier cooling inner restrictive coating, heat insulation lapping layer, gear fire bed and fire-retardant external sheath layer combine, cable is formed outer to interior flame-retardant layer, gear fire bed, heat insulation lapping layer, fire-retardant cooling layer thus, intercept owing to adding multilayer, the oxygen in air is made not infiltrate cable insulation, thus ensureing the insulating barrier not bating effect of insulated wire cores, when guaranteeing to demonstrate,prove fire, cable normally can work in 90 min of regulation.By the synergy of flame-retardant layer, gear fire bed, thermal insulation layer, cooling layer, finally realize fire-resistant object; The easy problem forming air gap and cause not having fire-resistant effect between conductor and insulating barrier can be solved, realize ensureing that the insulating barrier of insulated wire cores does not soften, there is good refractory ability.
It is basis material that heat insulation lapping layer is selected with acrylonitrile-butadiene rubber, adopt asbestos material and phenolic aldehyde that heat-insulating property is excellent, carry out the asbestos butyronitrile band made used in combination by a certain percentage, material is form stable fine and close carburization zone burning candle, through repeatedly proportioning test, burn that candle rate is minimum reaches 0.112mm/s.Ensure that outside heat is not easily transmitted to the inside of cable, thus protect the insulated wire cores of cable.
Gear fire bed selects wrinkle copper sheath, can block hot flame and injure cable further, and the construction of cable is stablized.
It is the oxygen barrier cooling layer that matrix has been mediated magnesium hydroxide or aluminium hydroxide and added Firebrake ZB that oxygen barrier cooling inner restrictive coating is selected with butyl rubber, its fire-retardant cool principle is as follows: one be hydroxide burned time absorb amount of heat in surrounding air, because this reaction is the endothermic reaction; Two is the hydrones generated, and also needs to absorb amount of heat, this reduces the temperature of combustion site in evaporation process; Three is create insoluble not molten metal oxide crust, prevents oxygen to contact with organic.Firebrake ZB melts at relatively high temperatures, forms vitreum cover layer, blocked polymer surface, isolated air.So fire-retardant cooling layer adopts heat absorption to carry out fire-retardant cooling with the method for oxygen barrier.
Fire-retardant external sheath layer selects oxygen index to be greater than the low smoke halogen-free flame-retardant polyolefin of 32, and low-smoke halogen-free polyolefin is when burning, and have light transmittance high, fire resistance is good, and the gas discharged during cable fire is not halogen-containing, can not cause secondary disaster to people and equipment.
Property indices of the present invention is excellent, all meets designing requirement.
Cable fire performance test test result is shown in Table 1 (testing by the regulation of GB GB/T19216.11-2003):
Table 1 cable fire energy Characteristics Detection result
Low smoke and zero halogen performance test test result (testing by GB/T19666-2005 regulation) as shown in table 2:
Table 2 cable low smoke and zero halogen performance test results
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is structural representation of the present invention.
Embodiment
As shown in Figure 1, the present invention includes the insulated wire cores being enclosed with insulation screen 4 and proof copper-wire braided screen 5, three insulated wire cores form cable core, cable core inside is filled with fire-retardant cooling material packed layer 6, and cable core is enclosed with oxygen barrier cooling inner restrictive coating 7, heat insulation lapping layer 8, gear fire bed 9 and fire-retardant external sheath layer 10 outward successively.
Insulated wire cores is made up of the conductor shield 2 of copper conductor 1 and copper conductor 1 outer wrapping and insulating barrier 3.
Insulating barrier 3 is crosslinked polyetylene insulated layer.
Fire-retardant cooling material packed layer 6 for butyl rubber be that matrix mediates hydroxide and magnesium Firebrake ZB.
Heat insulation lapping layer 8 is phenolic aldehyde/asbestos butyronitrile band.
Gear fire bed 9 is wrinkle copper sheath.
Oxygen barrier cooling inner restrictive coating 7 be that matrix has been mediated oxygen barrier that magnesium hydroxide or aluminium hydroxide adds Firebrake ZB and to be lowered the temperature layer with butyl rubber.
Fire-retardant external sheath layer 10 is low smoke halogen-free flame-retardant polyolefin layer.
The technological process of production of the present invention comprises the following steps:
Wire drawing-zinc-plated-copper conductor is stranded-semi-conductive tape wrapped-three-layer co-extruded insulation-proof copper-wire braided shielding-stranding-extrude oxygen barrier cooling inner restrictive coating 7-wrapped heat insulating belt 8-argon arc welding wrinkle copper sheathing-extrude fire-retardant external sheath layer 10-product inspection.
Main manufacture points in manufacture process of the present invention is as follows:
1, copper conductor 1 adopts performance to meet the 2nd kind of tinned copper conductor of GB/T3956 regulation.
2, the crosslinking process that insulated wire cores is three-layer co-extruded
The three-layer co-extruded crosslinked quality that insulate directly affects the electric property of cable, in process of production, adopt gravity blanking and thousand grades of purifications, focus on raw-material purification, shielding and insulating material extrude compactness, control the uniformity of insulation eccentricity degree and outer insulation diameter, can interfacial effect be reduced like this, improve the electric property of cable.Crosslinking temperature (comprising extrusion temperature and cross-linking vulcanized temperature), extruded velocity are the keys of crosslinked quality, by debugging, the summary of Nokia's degree of cross linking curve calculation and actual production, the rational relation of record insulation thickness and speed of production and cross-linking vulcanized temperature, draw cross-linking curve graph of a relation accurately, determine rational crosslinking process, instruct crosslinked production.
3, metallic shield
Metallic shield adopts the tinned copper wire braiding of Ф 0.3mm; Count should be not less than 80%.
4, to lower the temperature the extruding of layer material
Cooling heat insulation layer is that matrix has mediated a large amount of magnesium hydroxide or aluminium hydroxide adds Firebrake ZB with butyl rubber, and its fire-retardant cool principle is as follows: one be hydroxide burned time absorb amount of heat in surrounding air, react for the endothermic reaction; Two is the hydrones generated, and also needs to absorb amount of heat, this reduces the temperature of combustion site in evaporation process; Three is create insoluble not molten metal oxide crust, prevents oxygen to contact with organic.Firebrake ZB melts at relatively high temperatures, forms vitreum cover layer, blocked polymer surface, isolated air.
Be characterized in that loading is large, in extrusion, temperature rise is comparatively large, but extrusion temperature again can not be too high, extrudes and can not shape.Temperature again can not be specially too low, and extruder load is too large, and equipment may damage, we select 150 machine rubber machines for this reason, through repeated processing test, constantly grope expressing technique, from extrusion temperature and mould and draw fast three aspects and adjust, determine feasible expressing technique.
5, heat insulating belt is wrapped
Phenolic aldehyde/asbestos butyronitrile band is different with general twining package tape, and Tensile strength is low, easy fracture, and through carrying out proportioning improvement to phenolic aldehyde/asbestos butyronitrile band, tensile strength reaches 15.6Mpa, meets instructions for use.Equipment adds two taping heads simultaneously.Through constantly adjusting wrapped tension force, wrapping angle, finally meet technological requirement.Overlapping wrapped four layers of asbestos strap on cable core, Overlapped control is 35% ~ 45%.
6, argon arc welding wrinkle copper sheathing
Adopt argon arc welding wrinkle copper sheathing gear fire, define totally-enclosed gear fire bed, as long as copper sheathing thickness is suitable, reach excellent gear fire usefulness completely, ensure that isolated flame is to internal radiation.
Argon arc welding wrinkle copper sheathing technique adopts thickness to be the copper coin of 0.8mm, wraps, welds, line flaw detection detects, embossing process realizes through indulging; This technique is that copper coin is negative pole, and tungsten electrode is positive pole, has been come by low-voltage, big current under argon gas and helium protection; Tungsten electrode soldering tip diameter control is at 2 mm, and during welding, Current Control is good at about 85A, blows to solder joint continuously after welding by protective gas; take away heat rapidly; welding position is evenly cooled fast, and cable core can not be subject to any harmful effect, also avoids the high-temperature oxydation of copper sheathing simultaneously.For confirming the sealing of welding, whole dish cable is carried out gas-tight test.
For ensureing copper strips longitudinal tubing, arrange three road briquetting rollers, before welding, the angle of welding bell is by 6
0design, 0.5mm is amplified than copper sheath nominal outside diameter in welding nib footpath, and the configuration of copper sheath nominal outside diameter is pressed in plug die aperture, and it is suitable that 3.0mm is amplified than copper sheath nominal outside diameter in embossing tool bore footpath.Embossing severity control is at 4.2 ~ 4.3mm, and spacing is 21.4 mm.
7, the extruding of fire-retardant external sheath layer
PVC, PE cable jacket material is compared, owing to containing higher inserts and halogen-free flame retardants in low-smoke and halogen-free flame retardant polyolefin jacket material, its mobile performance is poor, plasticity reduces, thermal sensitivity is strong and easy frictional heat, in fuselage, the residence time is grown and easily decomposes, and produces a large amount of low molecular weight volatile thing, and separates out the surface in sheath, causing distinguishing that sight has incipient scorch particle, there is pore in sheath section.According to above feature, one piece of draw ratio customized is 25:1, and compression ratio is φ 150 extruder screw of 1:28, and through repeatedly test run adjusting process, each district temperature is most suitable by being set as in table 3.And preheating is carried out to raw material, adjusted by engine speed, material can be extruded smoothly, sheath smooth in appearance, section pore-free.
Claims (9)
1. one kind large-scale ocean marine fire-resistant power cable, comprise the insulated wire cores being enclosed with insulation screen (4) and proof copper-wire braided screen (5), it is characterized in that: many insulated wire cores form cable core, cable core inside is filled with fire-retardant cooling material packed layer (6), and cable core is enclosed with oxygen barrier cooling inner restrictive coating (7), heat insulation lapping layer (8), gear fire bed (9) and fire-retardant external sheath layer (10) outward successively.
2. large-scale ocean according to claim 1 marine fire-resistant power cable, is characterized in that: insulated wire cores is made up of the conductor shield (2) of copper conductor (1) and copper conductor (1) outer wrapping and insulating barrier (3).
3. large-scale ocean according to claim 2 marine fire-resistant power cable, is characterized in that: insulating barrier (3) is crosslinked polyetylene insulated layer.
4. large-scale ocean according to claim 1 and 2 marine fire-resistant power cable, is characterized in that: fire-retardant cooling material packed layer (6) is mineral wool rope layer.
5. large-scale ocean according to claim 1 and 2 marine fire-resistant power cable, is characterized in that: heat insulation lapping layer (8) is phenolic aldehyde/asbestos butyronitrile band.
6. large-scale ocean according to claim 1 and 2 marine fire-resistant power cable, is characterized in that: gear fire bed (9) is wrinkle copper sheath.
7. large-scale ocean according to claim 1 and 2 marine fire-resistant power cable, is characterized in that: oxygen barrier cooling inner restrictive coating (7) be that matrix has been mediated oxygen barrier that magnesium hydroxide or aluminium hydroxide adds Firebrake ZB and to be lowered the temperature layer with butyl rubber.
8. large-scale ocean according to claim 1 and 2 marine fire-resistant power cable, is characterized in that: fire-retardant external sheath layer (10) is low smoke halogen-free flame-retardant polyolefin layer.
9. large-scale ocean according to claim 1 and 2 marine fire-resistant power cable, is characterized in that: the quantity of insulated wire cores is three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310608067.9A CN104681187A (en) | 2013-11-27 | 2013-11-27 | Fire-resistant power cable for large-scale oceangoing vessels |
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| CN201310608067.9A CN104681187A (en) | 2013-11-27 | 2013-11-27 | Fire-resistant power cable for large-scale oceangoing vessels |
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| CN104681187A true CN104681187A (en) | 2015-06-03 |
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| CN201310608067.9A Pending CN104681187A (en) | 2013-11-27 | 2013-11-27 | Fire-resistant power cable for large-scale oceangoing vessels |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106251969A (en) * | 2016-10-17 | 2016-12-21 | 昆山翰辉电子科技有限公司 | A kind of flame-proof power cable |
| CN106273309A (en) * | 2016-09-16 | 2017-01-04 | 芜湖市旭辉电工新材料有限责任公司 | A kind of fire-retardant self limiting temperature geothermal heating cable working technology |
| CN106672285A (en) * | 2017-01-25 | 2017-05-17 | 西安通源石油科技股份有限公司 | Gunpowder packaging method for safe transportation, gunpowder packet for safe transportation and transferring pack for safe transportation |
| CN107068275A (en) * | 2017-03-13 | 2017-08-18 | 远东电缆有限公司 | A kind of green building presses fireproof cable in |
| CN107123464A (en) * | 2017-06-08 | 2017-09-01 | 成都新三电线厂 | Inorganic flame retardant polyvinyl chloride environment-friendly cable |
| CN107591224A (en) * | 2017-08-29 | 2018-01-16 | 嘉兴市天信电线有限公司 | A kind of high pressure resistant high temperature-resistant cable |
| CN109637733A (en) * | 2018-12-05 | 2019-04-16 | 安徽华能电缆集团有限公司 | A kind of high voltage flame resistant cable and preparation method thereof |
| CN110111926A (en) * | 2019-04-03 | 2019-08-09 | 深圳市奔达康电缆股份有限公司 | A kind of fireproof cable with automatic cooling mineral refuge floor |
-
2013
- 2013-11-27 CN CN201310608067.9A patent/CN104681187A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106273309A (en) * | 2016-09-16 | 2017-01-04 | 芜湖市旭辉电工新材料有限责任公司 | A kind of fire-retardant self limiting temperature geothermal heating cable working technology |
| CN106251969A (en) * | 2016-10-17 | 2016-12-21 | 昆山翰辉电子科技有限公司 | A kind of flame-proof power cable |
| CN106672285A (en) * | 2017-01-25 | 2017-05-17 | 西安通源石油科技股份有限公司 | Gunpowder packaging method for safe transportation, gunpowder packet for safe transportation and transferring pack for safe transportation |
| CN107068275A (en) * | 2017-03-13 | 2017-08-18 | 远东电缆有限公司 | A kind of green building presses fireproof cable in |
| CN107123464A (en) * | 2017-06-08 | 2017-09-01 | 成都新三电线厂 | Inorganic flame retardant polyvinyl chloride environment-friendly cable |
| CN107591224A (en) * | 2017-08-29 | 2018-01-16 | 嘉兴市天信电线有限公司 | A kind of high pressure resistant high temperature-resistant cable |
| CN109637733A (en) * | 2018-12-05 | 2019-04-16 | 安徽华能电缆集团有限公司 | A kind of high voltage flame resistant cable and preparation method thereof |
| CN110111926A (en) * | 2019-04-03 | 2019-08-09 | 深圳市奔达康电缆股份有限公司 | A kind of fireproof cable with automatic cooling mineral refuge floor |
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Application publication date: 20150603 |