CN1314680A - 35 KV XLPE insulating low-smoke halogen-free class A flame=retardent power cable - Google Patents

35 KV XLPE insulating low-smoke halogen-free class A flame=retardent power cable Download PDF

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Publication number
CN1314680A
CN1314680A CN 01110765 CN01110765A CN1314680A CN 1314680 A CN1314680 A CN 1314680A CN 01110765 CN01110765 CN 01110765 CN 01110765 A CN01110765 A CN 01110765A CN 1314680 A CN1314680 A CN 1314680A
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CN
China
Prior art keywords
flame
cable
smoke halogen
proof power
halogen
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Granted
Application number
CN 01110765
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Chinese (zh)
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CN1293575C (en
Inventor
郑保忠
郑顺山
温尚海
李继涛
戚景赞
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BAOFENG CABLE Co Ltd HEBEI PROV
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BAOFENG CABLE Co Ltd HEBEI PROV
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Publication date
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Priority to CNB011107650A priority Critical patent/CN1293575C/en
Publication of CN1314680A publication Critical patent/CN1314680A/en
Application granted granted Critical
Publication of CN1293575C publication Critical patent/CN1293575C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The power cable has around its central conductor successively shielding layer, insulating layer, insulating and shielding layer, semi-conducting nylon belt layer, shielding metal laeyr, backing layer, lining layer, rodentproof armouring thin steel belt layer and protective sleeve layer. The cable of the present invention has electric specification meeting the requirement to 26/35 KV cross-linked cable and has excellent fireproof and rodentproof performance.

Description

35KV XLPE insulating low-smoke halogen-free category-A flame-proof power cable
The invention relates to a kind of flame-proof power cable, more particularly about a kind of 35KVXLPE insulating low-smoke halogen-free category-A flame-proof power cable.
At present, fire-retardant in order to prevent that sheath that cable fire generally all adopts polyvinyl chloride to add the fire retardant manufacturing from carrying out, but this method rises cable cost significantly; In addition,, can produce a large amount of toxic smogs during high temperature because fire retardant contains a large amount of halogens, contaminated environment, and be added with fire retardant in the sheath and make the electrical performance indexes as insulating material that decline all be arranged, cause electric pressure to descend, influence the use of cable.
Because flame retardant cable is preventing fire spread, improve electric wiring lsafety level aspect and have important role, therefore, fire-retardantization of cable become this developing direction in several years of cable products.The kind of flame retardant cable develops gradually from the earliest polyvinyl chloride insulation and sheath flame retardant cable and to have the low-smoke fireproof cable that smog is low, acid gas is few, the low-smoke halogen-free inflaming-retarding cable kind low until smog, that acid gas is micro-.
Low-smoke halogen-free inflaming-retarding cable is owing to be subjected to the restriction of materials used performance, and its fire resistance is difficult to satisfactory, generally only can reach the fire-retardant rank of C class among the GB-12666.5-90, and the electric pressure of cable generally can not surpass 20KV.
The purpose of this invention is to provide a kind of electricapparatus performance requirement that can satisfy the cable use, the insulating low-smoke halogen-free category-A flame-proof power cable that can have the good flame retardancy level again.
The smog generating capacity was little when two of purpose of the present invention provided a kind of cable fire, and light transmittance is more than 80%, and the halogen acid gas amount that discharges during burning is zero, and the XLPE insulating low-smoke halogen-free category-A flame-proof power cable with anti-plague of rats function.
These and other objects of the present invention will further describe and embody by following detailed description.
In the present invention, crosslinked polyethylene of the present invention (XLPE) insulating low-smoke halogen-free category-A flame-proof power cable, from cable center conductor outward, be followed successively by conductor shield, insulating barrier, insulation screen, semiconductive nylon belt, metal screen layer, bed course, lining and protection against rodents armour and restrictive coating, wherein, the protection against rodents armour is the thin steel band of one deck.
Further, crosslinked polyethylene of the present invention (XLPE) insulating low-smoke halogen-free category-A flame-proof power cable, from cable center conductor outward, be followed successively by conductor shield, insulating barrier, insulation screen, semiconductive nylon belt, metal screen layer, bed course, lining and protection against rodents armour and restrictive coating, wherein, the protection against rodents armour is one deck Thin Stainless Steel steel band.
In the present invention, described protection against rodents armour Thin Stainless Steel steel band with wrapped form circumvolution on lining, lap is between 5～15 millimeters, the comprehensive oxygen index of product is more than 28, insulating barrier, insulation screen and the comprehensive oxygen index of semiconductive nylon belt are 15～21, the comprehensive oxygen index of bed course is 32～50, the comprehensive oxygen index of sheath is 35～45, content of halogen is zero, metal screen layer is made up of copper wire and copper strips, bed course is high oxygen index hypoxemia halogen-free flameproof glass fiber cloth, and cushion thickness is 2.0～3.0 millimeters, and jacket thickness is 2.3～3.0 millimeters.
Product of the present invention is the thin steel band of overlapping wrapped one deck under protective coverings of cable, and the heat that can under combustion case cable sheath is subjected to is disperseed rapidly like this, has reduced possibility of fire.Simultaneously, this steel belt layer can make its organic material and flame and combustion-supporting gas outside it inside isolated, prevents that effectively combustible species a large amount of under the steel belt layer from producing burning, thereby realizes the purpose of cable-flame retardant.In addition, the cable of this layer steel band after layer can also prevent to lay is subjected to the line outage accident that biting of mouse caused.
The present invention utilizes existing cables manufacturing material and process equipment, by rational material and textural association, the low-smoke non-halogen flame-retardant level of 35KV crosslinked cable is brought up to category-A, and has improved the ability that cable prevents the plague of rats.
Product of the present invention has following characteristics:
1, every electric property of cable all satisfies the index that requires of highest voltage level 26/35KV crosslinked cable among the GB-12706.3-91.
2, the fire resistance of cable satisfies high flame retardant rank-category-A bunched burning test requirement among the GB-12666.5-90.
3, the smog generating capacity is little during cable fire, and the poorest light transmittance also can reach 80%.
4, the halogen acid gas amount that discharges during cable fire is zero.
5, cable has anti-plague of rats function.
Below further specify the present invention by accompanying drawing and explanation thereof.
Fig. 1 is the structure letter view of cable of the present invention.
In Fig. 1, symbol 1 is represented conductor, symbol 2 is represented conductor shield, and symbol 3 is represented insulating barrier, and symbol 4 is represented insulation screen, symbol 5 is represented semiconductive nylon belt, symbol 6 is represented metal screen layer, and symbol 7 is represented bed course, and symbol 8 is represented lining, symbol 9 is represented the protection against rodents armour, and symbol 10 is represented restrictive coating.
Crosslinked polyethylene of the present invention (XLPE) insulating low-smoke halogen-free category-A flame-proof power cable, from cable center conductor outward, be followed successively by conductor shield 2, insulating barrier 3, insulation screen 4, semiconductive nylon belt 5, metal screen layer 6, bed course 7, lining 8 and protection against rodents armor 9 and restrictive coating 10, wherein, protection against rodents armor 9 is the thin steel band of one deck.
Further, crosslinked polyethylene of the present invention (XLPE) insulating low-smoke halogen-free category-A flame-proof power cable, from cable center conductor outward, be followed successively by conductor shield 2, insulating barrier 3, insulation screen 4, semiconductive nylon belt 5, metal screen layer 6, bed course 7, lining 8 and protection against rodents armor 9 and restrictive coating 10, wherein, protection against rodents armor 9 is one deck Thin Stainless Steel steel band.
Crosslinked polyethylene of the present invention (XLPE) insulating low-smoke halogen-free category-A flame-proof power cable, wherein protection against rodents armor 9 Thin Stainless Steel steel bands with wrapped form circumvolution on lining 8, lap is between 5～15 millimeters, and the comprehensive oxygen index (OI) of product is more than 28; The comprehensive oxygen index (OI) of insulating barrier 3, insulation screen 4 and semiconductive nylon belt 5 is 15～21, and the comprehensive oxygen index (OI) of bed course 7 is 32～50, and the comprehensive oxygen index (OI) of restrictive coating 10 is 35～45, and content of halogen is zero; Metal screen layer 6 is comprised of copper wire and copper strips, and bed course 7 is high oxygen index (OI) hypoxemia halogen-free flameproof glass fiber cloth, and the thickness of bed course 7 is 2.0～3.0 millimeters, and the thickness of restrictive coating 10 is 2.3～3.5 millimeters.
Crosslinked polyethylene of the present invention (XLPE) insulating low-smoke halogen-free category-A flame-proof power cable can prepare with existing material and process conditions. For example, center conductor 1 can be copper or aluminium, conductor shield 2 and insulation screen 4 can be the semiconductive plastics, insulating barrier 3 is cross-linking polyethylene materials, semiconductive nylon belt 5 can flood the conductive processing agent by nylon material and prepare, metal screen layer 6 is comprised of copper wire and copper strips, bed course 7 is high oxygen index (OI) hypoxemia halogen-free flameproof glass fiber cloth, lining 8 and restrictive coating 10 are low smoke and zero halogen extruded polyolefin material, protection against rodents armor 9 is the thin steel band of one deck, more than the selection of these materials all can from prior art, not spend creative work and learn.
In the preparation, except the condition of routine, when bed course and sheath extrude, should adopt extruding or half fashion of extrusion, it is closely knit to extrude layer, the section visible pore that do not have, the THICKNESS CONTROL of bed course is at 2.0～3.0 millimeters, the thinnest point can not be lower than 1.6 millimeters, and the THICKNESS CONTROL of restrictive coating is at 2.3～3.5 millimeters, and the thinnest point can not be lower than 2.3 millimeters, width of steel band is close with wrapped front diameter, deviation should not surpass 5 millimeters, smooth and overlapping will strictly control that steel band is wrapped, and lap should be controlled between 5～15 millimeters.
Below further specify the present invention by specific embodiment, but embodiment only be used for the explanation, can not limit the scope of the invention.
Example 1:1 * 95mm 2The 26/35KV crosslinked cable
(1), physical dimension:
11.6 millimeters of copper conductor external diameters
12.5 millimeters of insulation and shielding thicknesses
39.1 millimeters of metal screen layer external diameters
2.8 millimeters of cushion thicknesses
46 millimeters of protection against rodents armour external diameters
3.2 millimeters of restrictive coating thickness
55 millimeters of the outside diameters of cable;
(2), material mixture ratio control:
Crosslinked polyetylene insulated shielding oxygen index 17 content of halogen 0;
Bed course oxygen index 49 content of halogen 0;
Oversheath oxygen index 41 content of halogen 0;
The comprehensive oxygen index of cable is 29;
(3), cable fire result of the test:
Burning gases:
Halogen gas content (milligram/gram) 0
PH value 6.57
Electric screen rate (μ s/mm) 0.95
The smoke density test
Minimum light transmittance 80%
The burning of category-A bunchy
The charing part reaches height (millimeter) 0.92.
Example 2:2 * 116mm 2The 26/35KV crosslinked cable
(1), physical dimension:
6.8 millimeters of copper conductor external diameters
14.5 millimeters of insulation and shielding thicknesses
41.1 millimeters of metal screen layer external diameters
2.7 millimeters of cushion thicknesses
50 millimeters of protection against rodents armour external diameters
3.3 millimeters of restrictive coating thickness
60 millimeters of the outside diameters of cable;
(2), material mixture ratio control:
Crosslinked polyetylene insulated shielding oxygen index 19 content of halogen 0;
Bed course oxygen index 48 content of halogen 0;
Oversheath oxygen index 44 content of halogen 0;
The comprehensive oxygen index of cable is 30;
(3), cable fire result of the test:
Burning gases:
Halogen gas content (milligram/gram) 0
PH value 6.67
Electric screen rate (μ s/mm) 0.97
The smoke density test
Minimum light transmittance 80%
The burning of category-A bunchy
The charing part reaches height (millimeter) 0.94.
Product of the present invention detects through national electric wire quality supervision and test center, and all indexs have have all met or exceeded national standard, and concrete testing result sees attached list one.
Table one
Sample model and specification: DDZR-YJS53-26/35 1*95 Check numbering: CT2001-0018
Interventions Requested Standard-required Assay Individual event is judged
Cable core is counted the * cross section ????1*95
????1． The structure chi
????1.1 Conductor material conductor single line radical Minimum 15 Copper 19 ????√
????1.2 Insulation average thickness insulation thinnest part thickness Minimum 9.35 mm of minimum 10.5 mm ????10.6 ????10.3 ????√
????√
????1.3 Inner covering thinnest part thickness Minimum 0.84 mm ????2.70 ????√
????1.4 Stainless steel belt size--thickness * width ?????????????????mm ????0.15*50
????1.5 Sheath average thickness sheath thinnest part thickness Minimum 1.64 mm of mm ????3.2 ????2.80 ????√
????1.6 The outside diameter of cable ?????????????????mm ????56.2
????2． Finished cable surface marker marker spacing from Mark is correct, legibility; Easy identification, maximum 500 mm of anti-wiping By 470 ????√ ????√
????3． Electrical property
????3.1 Conductor DC resistance (20 ℃) Maximum 0.193 Ω km ????0.189 ????√
????3.2 Partial discharge (1.5u under the normality 0Down) Maximum 5 pC ????4.8
????3.3 (1.5u is put in part after the bend test 0Down) Maximum 5 pC ????4.9
????3.4 Partial discharge (1.5u behind the thermal cycling test 0Down) Maximum 5 pC ????4.9
????3.5 Dielectric loss angle tangent (90 ℃, u 0Down) Maximum 0.0010 ????0.0005 ????√
????3.6 Impulse voltage test (250kv, alternating voltage test subsequently positive-negative polarity each 10 times) (65kv, 15min) Do not puncture By passing through ????√ ????√
????3.7 Alternating voltage test (104kv) in 4 hours Do not puncture By ????√
????4． The insulation physical and mechanical properties
????4.1 The aging preceding elongation at break of tensile strength before aging Minimum 12.5 Nmm 2Minimum 200 % ????20.8 ????510 ????√ ????√
????4.2 Elongation at break rate of change before and after the tensile strength rate of change wore out before and after (135 ℃, the aging back of 7d watertight aircase) were aging Maximum ± 25 % maximums ± 25 % ????+17 ????+8 ????√ ????√
????4.3 The aging front and back of tensile strength rate of change elongation at break rate of change before and after (100 ℃, after the additional section of 7d wears out) are aging Maximum ± 25 % maximums ± 25 % ????-1 ????-6 ????√ ????√
????4.4 Hot elongation test
????(200℃,15min,20Ncm 2)--percentage elongation under the load--cooling back permanent set Maximum ????175 ????15 ????％ ????％ ????38 ????0 ????√ ????√
????4.5 Heat shrinkage test (130 ℃, 1h)-shrinkage Maximum ????4 ????％ ????0.5 ????√
????4.6 Insulation water absorption test--weight change Maximum ????1 ???mgcm 2 ????0.04 ????√
????5． The sheath physical and mechanical properties
????5.1 The aging preceding elongation at break of tensile strength before aging Minimum ????9.0 ????120 ???Nmm 2????％ ????14.9 ????130 ????√ ????√
????5.2 Elongation at break rate of change before and after the tensile strength rate of change wore out before and after (100 ℃, the aging back of 7d watertight aircase) were aging Maximum ????±25 ????±25 ????％ ????％ ????+13 ????-8 ????√ ????√
????5.3 The aging front and back of tensile strength rate of change elongation at break rate of change before and after (100 ℃, after the additional section of 7d wears out) are aging Maximum ????±25 ????±25 ????％ ????％ ????+19 ????-8 ????√ ????√
????5.4 Oxygen index Minimum ????38 ????％ ????41 ????√
????5.4 Oxygen index Minimum ????38 ????％ ????41 ????√
????5.5 Sheath halogen gas content Maximum ????100 ????0 ????√
????5.6 Sheath--value--conductivity Minimum maximum ????2.5 ????30 ????6.57 ????0.95 ????√
????6． Cable bunched burning test (category-A)--the charing part reaches height Maximum ????2.5 ????m ????0.92 ????√
????7． Cable smoke density test--minimum light transmittance Minimum ????30 ????％ ????80 ????√
Annotate: " √ " represents that this project is qualified, and " * " represents that this project is defective.

Claims (8)

1, a kind of 35KV XLPE insulating low-smoke halogen-free category-A flame-proof power cable, it is characterized in that outward from cable center conductor, be followed successively by conductor shield, insulating barrier, insulation screen, semiconductive nylon belt, metal screen layer, bed course, lining and protection against rodents armour and restrictive coating, wherein, the protection against rodents armour is the thin steel band of one deck.
2,35KV XLPE insulating low-smoke halogen-free category-A flame-proof power cable as claimed in claim 1, it is characterized in that outward from cable center conductor, be followed successively by conductor shield, insulating barrier, insulation screen, semiconductive nylon belt, metal screen layer, bed course, lining and protection against rodents armour and restrictive coating, wherein, the protection against rodents armour is one deck Thin Stainless Steel steel band.
3, as claim 1,2 described 35KV XLPE insulating low-smoke halogen-free category-A flame-proof power cables, it is characterized in that protection against rodents armour Thin Stainless Steel steel band with wrapped form circumvolution on lining, lap is between 5～15 millimeters.
4, as claim 1,2 described 35KV XLPE insulating low-smoke halogen-free category-A flame-proof power cables, it is characterized in that comprehensive oxygen index is more than 28.
5, as claim 1,2 described 35KV XLPE insulating low-smoke halogen-free category-A flame-proof power cables, it is characterized in that insulating barrier, insulation screen and the comprehensive oxygen index of semiconductive nylon belt are 15～21, the comprehensive oxygen index of bed course is 32～50, the comprehensive oxygen index of sheath is 35～45, and content of halogen is zero.
6,, it is characterized in that metal screen layer is made up of copper wire and copper strips as claim 1,2 described 35KV XLPE insulating low-smoke halogen-free category-A flame-proof power cables.
7,, it is characterized in that bed course is high oxygen index hypoxemia halogen-free flameproof glass fiber cloth as claim 1,2 described 35KV XLPE insulating low-smoke halogen-free category-A flame-proof power cables.
8, as the described 35KV XLPE of claim 1～7 insulating low-smoke halogen-free category-A flame-proof power cable, it is characterized in that cushion thickness is 2.0～3.0 millimeters, jacket thickness is 2.3～3.0 millimeters.
CNB011107650A 2001-04-20 2001-04-20 35 KV XLPE insulating low-smoke halogen-free class A flame=retardent power cable Expired - Fee Related CN1293575C (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100514509C (en) * 2003-07-25 2009-07-15 普雷斯曼电缆及系统能源有限公司 Continuous process for manufacturing electric cables
CN101414495B (en) * 2007-10-19 2010-05-19 上海波汇通信科技有限公司 Composite power cable
CN101834022A (en) * 2010-05-24 2010-09-15 扬州华城电缆有限公司 Flexible cable for environment-friendly medical equipment
CN102117676A (en) * 2010-12-22 2011-07-06 李永勤 Fully-closed high-voltage soft bus
CN102254614A (en) * 2011-05-06 2011-11-23 无锡市曙光电缆有限公司 Aluminum wire armored ultrahigh pressure power cable
CN102347105A (en) * 2010-08-05 2012-02-08 江苏亨通电力电缆有限公司 Fireproof power cable with high volume used in rail transit
CN103345967A (en) * 2013-07-04 2013-10-09 中国石油化工股份有限公司 Double-insulation double-protective-sleeve electric submersible pump electric cable
CN104575762A (en) * 2013-10-13 2015-04-29 宁夏海洋线缆有限公司 Fire-resistant shielding cable

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11306882A (en) * 1998-04-23 1999-11-05 Showa Electric Wire & Cable Co Ltd Electric power cable and manufacture thereof
CN2354216Y (en) * 1998-10-21 1999-12-15 甘肃长通电缆(集团)有限责任公司 Insulated electric-power cable of water-resistant high-level fire-retardant low-smoke halogen-free crosslinked polyethylene
CN2369327Y (en) * 1999-01-28 2000-03-15 河北利兴实业集团有限公司 Electric cable
CN2419668Y (en) * 2000-04-15 2001-02-14 青岛汉缆集团有限公司 Fireproof, anti-aging and corrosionproof electric cables
CN2469525Y (en) * 2001-04-20 2002-01-02 河北宝丰线缆有限公司 35KVXLPE A type insulation less smoke halogenless fire-retarded power supply cable

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100514509C (en) * 2003-07-25 2009-07-15 普雷斯曼电缆及系统能源有限公司 Continuous process for manufacturing electric cables
CN101414495B (en) * 2007-10-19 2010-05-19 上海波汇通信科技有限公司 Composite power cable
CN101834022A (en) * 2010-05-24 2010-09-15 扬州华城电缆有限公司 Flexible cable for environment-friendly medical equipment
CN102347105A (en) * 2010-08-05 2012-02-08 江苏亨通电力电缆有限公司 Fireproof power cable with high volume used in rail transit
CN102117676A (en) * 2010-12-22 2011-07-06 李永勤 Fully-closed high-voltage soft bus
CN102254614A (en) * 2011-05-06 2011-11-23 无锡市曙光电缆有限公司 Aluminum wire armored ultrahigh pressure power cable
CN103345967A (en) * 2013-07-04 2013-10-09 中国石油化工股份有限公司 Double-insulation double-protective-sleeve electric submersible pump electric cable
CN104575762A (en) * 2013-10-13 2015-04-29 宁夏海洋线缆有限公司 Fire-resistant shielding cable

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