CN2648562Y - 3KV and below cross-linked polyethylene insulation class A flame resistant DC electric cable - Google Patents
3KV and below cross-linked polyethylene insulation class A flame resistant DC electric cable Download PDFInfo
- Publication number
- CN2648562Y CN2648562Y CN 03203919 CN03203919U CN2648562Y CN 2648562 Y CN2648562 Y CN 2648562Y CN 03203919 CN03203919 CN 03203919 CN 03203919 U CN03203919 U CN 03203919U CN 2648562 Y CN2648562 Y CN 2648562Y
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- fire
- power cable
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- direct current
- retardant
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Abstract
A 3KV and below DC power cable of one step silane crosslinking PE insulated LSLH A type flame retardant comprises an insulation layer, a metal shield layer, an inner liner layer, an armor layer and a sleeve protection layer that arranged from the center of a cable core conductor to outside in sequence. The power cable has very good flame retardant capacity, and very little smog is emitted when burning, and no halogen is exhausted, the electrical capacity and mechanical capacity of the product can meet regulations of national standards.
Description
Invention field
The utility model is about a kind of power cable, more particularly about a kind of 3kV and the fire-retardant direct current power cable of following one-step silane cross-linked polyethylene insulating low-smoke halogen-free category-A.
Background technology
Along with scientific and technological progress and development and national economy, each field is increasing to the demand of crosslinked polyetylene insulated direct current cables, in the power plant, place such as skyscraper, subway, intelligent building, military naval vessel is more and more higher to fail safe, the reliability requirement of dc suppling equipment facility.The sheath that present flame retardant cable adopts polyvinyl chloride to add the fire retardant manufacturing more carries out fire-retardant, but this method rises cable cost significantly; In addition, owing to contain a large amount of halogens in the fire retardant, electric wire will be emitted a large amount of poison gas, acid mist and flue gas when burning, these combustion products are threat to life safety not only, contaminated environment, also can cause the heavy corrosion of equipment and building, withdraw and rescue property for fire extinguishing, fire-extinguishing and lifesaving and personnel and cause very big obstacle; And be added with fire retardant in the sheath, the electrical performance indexes as exhausted combustible material is all descended to some extent, cause electric pressure to descend, influence the use of cable.Therefore impelling people to research and develop the clean and environment-friendly electric wire of low cigarette, Halogen, low toxicity, is the trend of current flame-retardant electric wire and cable development.
Goal of the invention
The purpose of this utility model provides a kind of electric, mechanical performance requirement of both having satisfied cable, has the 3kV and the fire-retardant direct current power cable of following one-step silane cross-linked polyethylene insulating low-smoke halogen-free category-A of good flame retardancy again.This cable can satisfy the DC transmission system in special place.
Above-mentioned purpose of the present utility model will further describe and embody by following detailed description.
Technical scheme
3kV of the present utility model and the fire-retardant direct current power cable of following one-step silane cross-linked polyethylene insulating low-smoke halogen-free category-A from cable center conductor outward, are followed successively by insulating barrier, metal screen layer, inner covering, armour and external sheath layer.
Further, also can partly coat the phase-splitting colour band on the wherein said insulating barrier; Described conductor structure and form meet the regulation of GB/T3956; Described insulating barrier adopts the one-step silane cross-linked polyethylene material, and insulating barrier must be through Overheating Treatment; To be that one deck copper strips is wrapped form described metal screen layer, and copper strips thickness is 0.1-0.3mm; Described inner covering is a low-smoke halogen-free flame retardant, and its thickness meets the regulation of GB2952; Described external sheath layer is a low-smoke halogen-free flame retardant, and its thickness meets the regulation of GB2952.
In the utility model, conductor can be one or more.
Product of the present utility model has following characteristics:
1, conductor DC resistance meets the regulation of GB/T3956;
2, the specific insulation of one-step silane cross-linked polyethylene insulation is 1.0 * 10
16Ω cm;
3, under the direct voltage 4U, continue the 4h insulation and do not puncture;
4, cable is by the category-A burning test level of GB/T18380.3 regulation;
5, smoke density meets the regulation of GB12666.7 during cable fire;
6, emergent gas corrosivity meets the regulation of GB/T17650, wherein pH value during cable fire " 4.3, conductivity " 10 μ S/mm.
Below further specify the utility model by accompanying drawing and explanation thereof.
Description of drawings
Below further specify the utility model by accompanying drawing and explanation thereof.
Fig. 1 is that the structure of the utility model power cable is analysed and observe simple view.
Fig. 2 is that second kind of structure of the utility model power cable analysed and observe simple view.In Fig. 1 to Fig. 2, symbol 1 is represented conductor, and symbol 2 is represented insulating layer of conductor, and symbol 3 is represented metal screen layer, and symbol 4 is represented inner covering, and symbol 5 is represented armour, and on behalf of external sheath layer and symbol 7, symbol 6 represent phase-splitting colour band layer, meets 8 and represents belting layer.
Embodiment
As shown in Figure 1,3kV of the present utility model and the fire-retardant direct current power cable of following one-step silane cross-linked polyethylene insulating low-smoke halogen-free category-A, count outward from cable center conductor 1, be followed successively by insulating barrier 2, metal screen layer 3, inner covering 4, armour 5 and external sheath layer 6, wherein to be that one deck copper strips is wrapped form metal screen layer, and copper strips thickness is 0.12mm.
As shown in Figure 2,3kV of the present utility model and the fire-retardant direct current power cable of following one-step silane cross-linked polyethylene insulating low-smoke halogen-free category-A, count outward from cable center conductor 1, be followed successively by insulating barrier 2, metal screen layer 3, inner covering 4, armour 5 and external sheath layer 6, phase-splitting colour band layer 7 and belting layer 8, wherein, insulating barrier 2 tops are coating phase-splitting colour band 7, insulating barrier 2 coating conductors 1, metal screen layer 3 is coating conductor 1 and insulating barrier 2, and inner covering 4 coats two isometrical conductors 1, wherein, belting layer 8 is between metal screen layer 3 and inner covering 4, and to be that one deck copper strips is wrapped form metal screen layer, and copper strips thickness is 0.1mm.
The utility model utilizes existing cables manufacturing material and process equipment, by rational material and textural association, produces 3kV and the fire-retardant direct current power cable of following one-step silane cross-linked polyethylene insulating low-smoke halogen-free category-A.For example, the structure of cable conductor and size conforms standard GB/T3956; Insulation Material adopts film-grade PE, crosslinking agent is a liquid silane, extrusion equipment adopts Three layer coextruding one step crosslinked with silicane production line, whole production line adopts system controlled by computer, and show, follow the tracks of the particulars in the production process at any time, can carry out the technology adjustment to the abnormal conditions in the production process at any time, the quality of product is guaranteed; In addition, in order to eliminate the space charge in crosslinked polyetylene insulated, after insulating exruded, set up heat treatment step one, that is: insulated wire cores is inserted temperature 70 ℃ vacuumize in the drying room, heat-treat, the time is 48h, extrudes a thin bar phase-splitting colour band as required at insulating surface simultaneously; Inner covering is the type of extruding, adopt the low-smoke non-halogen flame-retardant inserts, the oxygen index of this inner covering is up to more than 40, during cable fire, inner covering can charing become shell, form fire-retardant barrier together, when burning, can also discharge steam, play the effect of cooling, its processing technology is for adopting the screw rod of low compression ratio, reduce in the extrusion screw rod to the shearing force of material, and strict control extrusion temperature, maximum temperature is no more than 160 ℃; Armour need have the cable of armour to determine by GB2952 according to laying environment and customer requirements; What cable jacket adopted is low-smoke and halogen-free flame retardant polyolefin jacket material, oxygen index 〉=35, burning discharges the corrosivity index of gas: the pH value " 4.3, conductivity " 10 μ S/mm, this oversheath also has the favorable mechanical physical property simultaneously, satisfy the cable machinery performance demands, the processing technology and the inner covering of this external sheath layer are similar, use the screw rod of low compression ratio, adopt not to be higher than 170 ℃ extrusion temperature, in order to make oversheath better mechanical performance is arranged, the draw ratio of the extrusion die that is adopted is below 2.0, effectively eliminate the internal stress that strain stretch causes, improved the mechanical performance and the presentation quality of oversheath.
After tested, one-step silane cross-linked polyethylene insulating low-smoke halogen-free category-A resistance of the present utility model The combustion insulation DC electric cable has good fire resistance, only discharges a small amount of smog when burning, and Halogen-free effusion. The electric property of product and mechanical and physical performance all meet the regulation of national standard. The advantage of this product maximum is that the rescue work that is conducive to the scene of fire can carry out smoothly, and Pernicious gas is to people on every side and the serious harm of instrument and meter after can avoiding fire fully.
Claims (7)
1, a kind of 3kV and the fire-retardant direct current power cable of following crosslinked polyetylene insulated category-A is characterized in that from cable center conductor outward, are followed successively by insulating barrier, metal screen layer, inner covering, armour and external sheath layer.
2,3kV according to claim 1 and the fire-retardant direct current power cable of following crosslinked polyetylene insulated category-A wherein also can partly coat the phase-splitting colour band on the insulating barrier.
3,3kV according to claim 1 and 2 and the fire-retardant direct current power cable of following crosslinked polyetylene insulated category-A, wherein insulating barrier adopts the one-step silane cross-linked polyethylene material, and insulating barrier must be through Overheating Treatment.
4,3kV according to claim 1 and 2 and the fire-retardant direct current power cable of following crosslinked polyetylene insulated category-A, wherein to be that one deck copper strips is wrapped form metal screen layer, and copper strips thickness is 0.1-0.3mm.
5,3kV according to claim 1 and 2 and the fire-retardant direct current power cable of following crosslinked polyetylene insulated category-A, wherein inner covering is a low-smoke halogen-free flame retardant, its thickness meets the regulation of GB2952.
6,3kV according to claim 1 and 2 and the fire-retardant direct current power cable of following crosslinked polyetylene insulated category-A, wherein external sheath layer is a low-smoke halogen-free flame retardant, its thickness meets the regulation of GB2952.
7, according to claim 1 or 6 described 3kV and the fire-retardant direct current power cable of following crosslinked polyetylene insulated category-A, wherein conductor can be one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03203919 CN2648562Y (en) | 2003-02-13 | 2003-02-13 | 3KV and below cross-linked polyethylene insulation class A flame resistant DC electric cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03203919 CN2648562Y (en) | 2003-02-13 | 2003-02-13 | 3KV and below cross-linked polyethylene insulation class A flame resistant DC electric cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2648562Y true CN2648562Y (en) | 2004-10-13 |
Family
ID=34324193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03203919 Expired - Fee Related CN2648562Y (en) | 2003-02-13 | 2003-02-13 | 3KV and below cross-linked polyethylene insulation class A flame resistant DC electric cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2648562Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928125A (en) * | 2014-03-28 | 2014-07-16 | 安徽华天电缆有限公司 | Environment-friendly anti-oxidation insulated shielding cable |
| CN103956205A (en) * | 2014-03-28 | 2014-07-30 | 安徽华成电缆有限公司 | Low-smoke zero-halogen insulation fireproof cable |
| CN111508643A (en) * | 2020-04-02 | 2020-08-07 | 朱永松 | Withstand voltage tensile high strength high insulation cable |
-
2003
- 2003-02-13 CN CN 03203919 patent/CN2648562Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928125A (en) * | 2014-03-28 | 2014-07-16 | 安徽华天电缆有限公司 | Environment-friendly anti-oxidation insulated shielding cable |
| CN103956205A (en) * | 2014-03-28 | 2014-07-30 | 安徽华成电缆有限公司 | Low-smoke zero-halogen insulation fireproof cable |
| CN111508643A (en) * | 2020-04-02 | 2020-08-07 | 朱永松 | Withstand voltage tensile high strength high insulation cable |
| CN111508643B (en) * | 2020-04-02 | 2021-05-18 | 江苏昌德嘉电缆有限公司 | Withstand voltage tensile high strength high insulation cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING HAIHOU INDUSTRIAL DEVELOPMENT CO., LTD. Free format text: FORMER OWNER: CABLE SCIENCE TECHNOLOGY INST., CO., LTD., HEBEI PROV. Effective date: 20060317 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20060317 Address after: 100061, room 34, building 409, Southern China, Chongwen District, Beijing Patentee after: Beijing sea roaring Industrial Development Co., Ltd. Address before: 062451, Hejian City, Hebei Province, and hi tech park, Qi County Patentee before: Inst. of Wire Cable Sci-Tech Co., Ltd., Hebei |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20041013 Termination date: 20120213 |