CN105070394A - Fire-proof and fire-resistant medium-voltage power cable - Google Patents

Fire-proof and fire-resistant medium-voltage power cable Download PDF

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Publication number
CN105070394A
CN105070394A CN201510453141.3A CN201510453141A CN105070394A CN 105070394 A CN105070394 A CN 105070394A CN 201510453141 A CN201510453141 A CN 201510453141A CN 105070394 A CN105070394 A CN 105070394A
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CN
China
Prior art keywords
fire
power cable
fireproof
layer
pressure power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510453141.3A
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Chinese (zh)
Inventor
魏永乾
邱树魁
杨学民
杜亚红
刘瑞宁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LANZHOU ZHONGBANG GROUP CO Ltd
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LANZHOU ZHONGBANG GROUP CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by LANZHOU ZHONGBANG GROUP CO Ltd filed Critical LANZHOU ZHONGBANG GROUP CO Ltd
Priority to CN201510453141.3A priority Critical patent/CN105070394A/en
Publication of CN105070394A publication Critical patent/CN105070394A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a fire-proof and fire-resistant medium-voltage power cable comprising a wire core bundle composed of a plurality of wire cores. Each wire core includes a conductor, and an inner shielding layer, an insulating layer and an outer shielding layer which sequentially coat the conductor from inside to outside. A cabling wrapping layer, a fire-resistant oxygen insulation layer, a fire-resistant isolation layer and a sheath layer sequentially coat the wire core bundle from inside to outside. Fire-resistant filling ropes fill the gaps between the wire cores and between the wire core bundle and the cabling wrapping layer. The fire-proof and fire-resistant medium-voltage power cable of the invention is fire-proof, fire-resistant, flame-retardant, low-smoke and non-toxic. Combustion can be delayed long. Smoothness of lines under the condition of fire is ensured.

Description

A kind of fireproof type medium-pressure power cable
Technical field
The present invention relates to technical field of wire cable manufacture, especially a kind of fireproof type medium-pressure power cable.
Background technology
Along with China's expanding economy, the quickening of urbanization process, electricity need load cumulative year after year, medium-pressure power cable is widely used in the electric power system in the places such as building, residential building, hotel, hospital.In recent years, in China's electric power system fire incident, the ratio causing power system power supply to interrupt because power cable catches fire is on the rise, seems particularly important for the fail safe under Fire Conditions in intermediate distribution system.Once breaking out of fire, can discharge dense smoke during the burning of general category fire-retardant medium-pressure power cable, release toxic gas, it is fast to prolong combustion speed, causes that rescue time is short, loss injures and deaths are large, cause huge personal safety injury and property loss.Make fire-resistant class medium-pressure power cable demand huge for the safety precaution of fire incident in distribution system.Current domestic fire-resistant class medium-pressure power cable is started late, and each producer's technical merit residual error is uneven uneven, and most fire-resistant class medium-pressure power cable depends on imported product.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose a kind of fireproof type medium-pressure power cable, fire prevention, fire-resistant, fire-retardant, low cigarette, nontoxic, prolong the combustion time long, ensure that circuit is unobstructed in case of fire.
In order to realize foregoing invention object, the invention provides following technical scheme:
A kind of fireproof type medium-pressure power cable, comprises the core bundle that several wire core is formed, and core described in every root comprises conductor and outside coated successively from inside to outside internal shield, insulating barrier and the outer shielding layer of described conductor,
Stranding lapping layer, fireproof oxygen-separation layer, fire-resistant separator and restrictive coating is coated with from inside to outside successively in described core bundle outside,
Fire-resistant gasket for packing is filled with between each described core and between described core bundle and described stranding lapping layer.
Further, described restrictive coating adopts low smoke halogen-free fire retardant polyolefin cable material.
Further, described fire-resistant separator adopts four layers of ceramic fireproof composite band, puts up rate overlap wrapped by 30% to 40%.
Further, described fireproof oxygen-separation layer adopts ceramic low-smoke halogen-free polyolefin refractory matter.
Further, between described stranding lapping layer and described fireproof oxygen-separation layer, low cigarette oxygen barrier layer is provided with.
Further, described low cigarette oxygen barrier layer adopts low smoke and zero halogen oxygen barrier material, and described low smoke and zero halogen oxygen barrier material comprises aluminium hydroxide and magnesium hydroxide.
Further, described stranding lapping layer adopts glass fiber tape overlap wrapped, and Duplication is 20% to 30%.
Further, described fire-resistant gasket for packing is ceramic fireproof gasket for packing.
Further, described in every root, the outer shielding layer outside of core is also coated with copper strip shielding layer.
Further, described copper strip shielding layer single overlays is wrapped, and the rate of putting up is 15% to 25%.
A kind of fireproof type of the present invention medium-pressure power cable, when guaranteeing that fire-resistant medium-pressure power cable is subject to flame combustion, cable jacket does not produce pernicious gas, prolonging combustion; Cable internal barrier forms hard ceramic-like duricrust, and the higher housing of temperature is harder, protects internal wiring greatly; Oxygen barrier layer, by under the condition of high temperature, discharges the crystallization water and forms the molten duricrust do not fired, effectively playing the effect of lowering the temperature with isolation.Really accomplish to guarantee that electric power is unobstructed in case of fire, for emergency staffs life and property try to gain time precious to one to greatest extent.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of fireproof type medium-pressure power cable of the present invention.
Embodiment
Describe the present invention below in conjunction with accompanying drawing, the description of this part is only exemplary and explanatory, should not have any restriction to protection scope of the present invention.
A kind of fireproof type medium-pressure power cable as shown in Figure 1, comprise the core bundle that several wire core is formed, every root core comprises coated successively from inside to outside internal shield 2, insulating barrier 3 and the outer shielding layer 4 of conductor 1 and conductor 1 outside, internal shield 2, insulating barrier 3 and outer shielding layer 4 adopt chemical crosslinking three-layer co-extruded
Stranding lapping layer 7, fireproof oxygen-separation layer 9, fire-resistant separator 10 and restrictive coating 11 is coated with from inside to outside successively in core bundle outside,
Fire-resistant gasket for packing 6 is filled with between each core and between core bundle and stranding lapping layer 7.
Restrictive coating 11 adopts low smoke halogen-free fire retardant polyolefin cable material.Cable material of polyolefin can not produce a large amount of dense smoke and toxic gas when breaking out of fire, and oxygen index is high, and ratio of combustion is more difficult.
Fire-resistant separator 10 adopts four layers of ceramic fireproof composite band, puts up rate overlap wrapped by 30% to 40%, and wrapped rear band is smooth, compact.Ceramic fireproof composite band is rolled by ceramic fireproof silicon rubber and temperature resistant glass fiber cloth to be composited, under fire hazard environment 650 DEG C to 3000 DEG C, and rapidly by the complete housing that Low fire ceramic shape is hard, the ablation time is longer and temperature is higher.Housing is harder, plays a very good protection to circuit.
Fireproof oxygen-separation layer 9 adopts ceramic low-smoke halogen-free polyolefin refractory matter to extrude, and outward appearance rounding, without defects such as the old glue of cut.Ceramic low-smoke halogen-free polyolefin refractory matter can produce hard ceramic-like duricrust under flame calcination or hot conditions, duricrust not melting, does not drip, can anti-strenuous exercise, has extraordinary heat insulation fire insulation effect.
Low cigarette oxygen barrier layer 8 is provided with between stranding lapping layer 7 and fireproof oxygen-separation layer 9.
Low cigarette oxygen barrier layer 8 adopts low smoke and zero halogen oxygen barrier material, and low smoke and zero halogen oxygen barrier material comprises aluminium hydroxide and magnesium hydroxide.
Stranding lapping layer 7 adopt high temperature resistant, high strength glass fiber band overlap is wrapped, Duplication is 20% to 30%, and wrapped rear cable core rounding compacts.
Fire-resistant gasket for packing 6 is ceramic fireproof gasket for packing 6, forms stiff shell, have fire-resistant fire performance, do not come off after sintering, do not shrink, do not drip, can not cause spot fire under temperature 650 DEG C ~ 3000 DEG C conditions after can burning.
Copper strip shielding layer 5 is also coated with in outer shielding layer 4 outside of every root core.
Copper strip shielding layer 5 single overlays is wrapped, and the rate of putting up is 15% to 25%, and the wrapped tension force of copper strips can not tension, ensures the wrapped continuous uniform of copper strips, flat smooth, not fracture.
When the present invention guarantees that fire-resistant medium-pressure power cable is subject to flame combustion, cable jacket does not produce pernicious gas, prolonging combustion; Cable internal barrier forms hard ceramic-like duricrust, and the higher housing of temperature is harder, protects internal wiring greatly; Oxygen barrier layer, by under the condition of high temperature, discharges the crystallization water and forms the molten duricrust do not fired, effectively playing the effect of lowering the temperature with isolation.Really accomplish to guarantee that electric power is unobstructed in case of fire, for emergency staffs life and property try to gain time precious to one to greatest extent.

Claims (10)

1. a fireproof type medium-pressure power cable, is characterized in that, comprises the core bundle that several wire core is formed, and core described in every root comprises conductor and described conductor outside coated successively from inside to outside internal shield, insulating barrier and outer shielding layer,
Stranding lapping layer, fireproof oxygen-separation layer, fire-resistant separator and restrictive coating is coated with from inside to outside successively in described core bundle outside,
Fire-resistant gasket for packing is filled with between each described core and between described core bundle and described stranding lapping layer.
2. a kind of fireproof type medium-pressure power cable as claimed in claim 1, is characterized in that, described restrictive coating adopts low smoke halogen-free fire retardant polyolefin cable material.
3. a kind of fireproof type medium-pressure power cable as claimed in claim 1, it is characterized in that, described fire-resistant separator adopts four layers of ceramic fireproof composite band, puts up rate overlap wrapped by 30% to 40%.
4. a kind of fireproof type medium-pressure power cable as claimed in claim 1, is characterized in that, described fireproof oxygen-separation layer adopts ceramic low-smoke halogen-free polyolefin refractory matter.
5. a kind of fireproof type medium-pressure power cable as claimed in claim 1, is characterized in that, between described stranding lapping layer and described fireproof oxygen-separation layer, be provided with low cigarette oxygen barrier layer.
6. a kind of fireproof type medium-pressure power cable as claimed in claim 5, is characterized in that, described low cigarette oxygen barrier layer adopts low smoke and zero halogen oxygen barrier material, and described low smoke and zero halogen oxygen barrier material comprises aluminium hydroxide and magnesium hydroxide.
7. a kind of fireproof type medium-pressure power cable as claimed in claim 1, is characterized in that, described stranding lapping layer adopts glass fiber tape overlap wrapped, and Duplication is 20% to 30%.
8. a kind of fireproof type medium-pressure power cable as claimed in claim 1, it is characterized in that, described fire-resistant gasket for packing is ceramic fireproof gasket for packing.
9. a kind of fireproof type medium-pressure power cable as claimed in claim 1, it is characterized in that, described in every root, the outer shielding layer outside of core is also coated with copper strip shielding layer.
10. a kind of fireproof type medium-pressure power cable as claimed in claim 9, it is characterized in that, described copper strip shielding layer single overlays is wrapped, and the rate of putting up is 15% to 25%.
CN201510453141.3A 2015-07-29 2015-07-29 Fire-proof and fire-resistant medium-voltage power cable Pending CN105070394A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510453141.3A CN105070394A (en) 2015-07-29 2015-07-29 Fire-proof and fire-resistant medium-voltage power cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510453141.3A CN105070394A (en) 2015-07-29 2015-07-29 Fire-proof and fire-resistant medium-voltage power cable

Publications (1)

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CN105070394A true CN105070394A (en) 2015-11-18

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107658056A (en) * 2017-10-31 2018-02-02 正威科技(深圳)有限公司 A kind of high speed optoelectronic composite cable
CN108364724A (en) * 2018-01-20 2018-08-03 上海查尔斯光电科技有限公司 A kind of harness
CN109524172A (en) * 2018-11-02 2019-03-26 江苏亨通电力电缆有限公司 The manufacturing process of fireproof cable is pressed in intelligent early-warning communication use

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201616291U (en) * 2010-02-01 2010-10-27 曾桃红 Fireproof oxygen-separation variable-frequency cable
CN202632870U (en) * 2012-06-27 2012-12-26 安徽龙庵电缆集团有限公司 Medium-voltage fireproof frequency-conversion electric cable
CN102938276A (en) * 2012-11-19 2013-02-20 四川明星电缆股份有限公司 Manufacturing method of safety fire-resistant medium and high voltage cables
CN202948778U (en) * 2012-12-06 2013-05-22 申环电缆科技有限公司 Environment-friendly ceramic fireproofing fire-resistant power cable
CN203276947U (en) * 2013-04-11 2013-11-06 安徽海纳电缆集团有限公司 Environmentally friendly low-smoke halogen-free flame-retardant fireproof medium-voltage power cable
CN203520988U (en) * 2013-10-21 2014-04-02 辽宁通用电缆有限公司 Zero-halogen low-smoke cables flame-retardant medium-voltage fireproof cable
CN203826091U (en) * 2014-04-24 2014-09-10 广州电气输配电有限公司 Environment-friendly wrapping-type ceramic silicone rubber fire-resistant cable
CN203931592U (en) * 2014-01-03 2014-11-05 深圳市沃尔核材股份有限公司 Fire-resistant gasket for packing
CN104795163A (en) * 2015-04-09 2015-07-22 西部电缆有限公司 Ethylene propylene rubber insulated fireproof armored cable with nominal voltage of 10KV and production method of ethylene propylene rubber insulated fireproof armored cable
CN204792158U (en) * 2015-07-29 2015-11-18 兰州众邦电线电缆集团有限公司 Fire -resistant type middling pressure power cable prevents fires

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201616291U (en) * 2010-02-01 2010-10-27 曾桃红 Fireproof oxygen-separation variable-frequency cable
CN202632870U (en) * 2012-06-27 2012-12-26 安徽龙庵电缆集团有限公司 Medium-voltage fireproof frequency-conversion electric cable
CN102938276A (en) * 2012-11-19 2013-02-20 四川明星电缆股份有限公司 Manufacturing method of safety fire-resistant medium and high voltage cables
CN202948778U (en) * 2012-12-06 2013-05-22 申环电缆科技有限公司 Environment-friendly ceramic fireproofing fire-resistant power cable
CN203276947U (en) * 2013-04-11 2013-11-06 安徽海纳电缆集团有限公司 Environmentally friendly low-smoke halogen-free flame-retardant fireproof medium-voltage power cable
CN203520988U (en) * 2013-10-21 2014-04-02 辽宁通用电缆有限公司 Zero-halogen low-smoke cables flame-retardant medium-voltage fireproof cable
CN203931592U (en) * 2014-01-03 2014-11-05 深圳市沃尔核材股份有限公司 Fire-resistant gasket for packing
CN203826091U (en) * 2014-04-24 2014-09-10 广州电气输配电有限公司 Environment-friendly wrapping-type ceramic silicone rubber fire-resistant cable
CN104795163A (en) * 2015-04-09 2015-07-22 西部电缆有限公司 Ethylene propylene rubber insulated fireproof armored cable with nominal voltage of 10KV and production method of ethylene propylene rubber insulated fireproof armored cable
CN204792158U (en) * 2015-07-29 2015-11-18 兰州众邦电线电缆集团有限公司 Fire -resistant type middling pressure power cable prevents fires

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107658056A (en) * 2017-10-31 2018-02-02 正威科技(深圳)有限公司 A kind of high speed optoelectronic composite cable
CN108364724A (en) * 2018-01-20 2018-08-03 上海查尔斯光电科技有限公司 A kind of harness
CN109524172A (en) * 2018-11-02 2019-03-26 江苏亨通电力电缆有限公司 The manufacturing process of fireproof cable is pressed in intelligent early-warning communication use

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Application publication date: 20151118

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