CN201859687U - High flame-retardant, fire-resistant and water tree-resistant medium voltage power cable - Google Patents
High flame-retardant, fire-resistant and water tree-resistant medium voltage power cable Download PDFInfo
- Publication number
- CN201859687U CN201859687U CN 201020590483 CN201020590483U CN201859687U CN 201859687 U CN201859687 U CN 201859687U CN 201020590483 CN201020590483 CN 201020590483 CN 201020590483 U CN201020590483 U CN 201020590483U CN 201859687 U CN201859687 U CN 201859687U
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- power cable
- water tree
- flame retardant
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Abstract
The utility model relates to a High flame-retardant, fire-resistant and water tree-resistant medium voltage power cable, which belongs to the technical field of cables. The power cable comprises a shielding insulation wire core cabled cable core and a sheath. The power cable is characterized in that the shielding insulation wire core is composed of a conductor shielding layer, an insulation layer, an insulation shielding layer and a copper strip shielding layer that are arranged on a conductor in sequence and have the water tree-resistant performance; the cable core is internally provided with a padding; an oxygen-isolation layer, an isolation sleeve, an armor layer and a fire-resistant layer are arranged on the cable core in sequence; and the low-smoke halogen-free flame-retardant polyolefin outer sheath is extruded on the fire-resistant layer. The power cable has reasonable and simple structure and good service performance and is easy to produce and manufacture. The power cable has high flame-retardant performance, good fire resistance, strong water tree resistance, good spray proof, large carrying capacity and strong external force resistant ability, is suitable for places with high flame-retardant and fire-resistant rating requirements such as high-rise buildings, tunnels, oil fields, electric power stations, electricity generating stations, chemical industry, mines, large places of entertainment, sporting places and large hotels and has good safety and reliability and long service life.
Description
Technical field
The utility model relates to a kind of structure of cable, relates in particular to the structure of high flame retardant, fire-resistant, anti-water tree medium-pressure power cable, belongs to the cable technology field.
Background technology
In press the power cable of XLPE (crosslinked) insulation to be adopted widely because of its good insulation preformance, allowable temperature advantages of higher, but the water tree problem in the high flame retardant of cable, fire-resistant, insulation is the principal element that influences its fail safe and reliability service always.
In the manufacturing of medium-pressure power cable or install and use in the process, have in the water intrusion insulator of minute quantity, the water of this moment is being distributed in the insulator of diversity, when the cable operate as normal, hydrone is under effect of electric field, because of polarization produces migration, the irregularity position of insulated body itself, be that relative rejected region attracts,, just produce local hypersaturated state along with building up of aqueous vapor.Along with the increasing of polarization migration, the local pressure of the relative rejected region of insulator constantly rises, and causes mechanical damage thereby micropore is enlarged.Like this, the water tree just progressively generates, and forms high electric field at the tip of water tree, impels the further extension of water tree.In the wherein manufacturing process, the hydrone of introducing easily forms knot shape water tree, installs and uses the hydrone of introducing in the process and easily forms divergence form water tree.Growth along with the water tree, the electric field at water tree tip is concentrated further, local high electric field finally can cause the most advanced and sophisticated electric branch that causes of water tree, and in a single day electric branch forms and can cause the XLPE cable insulation breakdown in a short time, thereby shortened the useful life of medium-pressure power cable greatly.So development, exploitation high flame retardant, midium voltage cable that fire-resistance property is good are urgent tasks of cable R﹠D institution and manufacturing enterprise.
The utility model content
The purpose of this utility model is exactly for satisfying the needs in market, a kind of high flame retardant, fire-resistant, anti-water tree medium-pressure power cable being provided.
The purpose of this utility model is to realize like this, high flame retardant, fire-resistant, anti-water tree medium-pressure power cable, the cable core and the sheath that comprise shielding insulation core stranding, it is characterized in that described shielding insulation core is to set gradually conductor shield, insulating barrier, insulation screen, copper strips screen with water tree resistant property to constitute on conductor, be provided with filling in the cable core, be provided with oxygen barrier layer, separation sleeve, armour, flame retardant coating on the cable core successively, on flame retardant coating, extrude the low smoke halogen-free flame-retardant polyolefin oversheath.
Described armour is made of steel band and wire armoring.
Described oxygen barrier layer and flame retardant coating are made of the high thermal conducting material of low thermal resistance.
Described insulating barrier is the crosslinked polyethylene insulation material layer.
The utility model is rational in infrastructure simple, manufactures easily, and serviceability is good.Conductor screen, insulation, insulation shielding all adopt the raw material with water tree resistant property, in the manufacturing process of product, can prevent the intrusion of aqueous vapor, have avoided in the cable use in the future at inner water tree, the good insulation preformance of producing of insulation.It has the stronger function of releasing water, gasification, foaming the refractory matter of using, and crosslinked polyetylene insulated and outer semiconducting layer is still excellent even through 90 minutes 800 ℃ flame calcination, fire resistance is strong.Because burning back insulation is complete, the impact and the spray of fire water in the time of therefore can bearing fire can be because of the immersion of the water punctures of leaking electricity.Oxygen barrier layer and flame retardant coating are the high thermal conducting material of low thermal resistance when normality, behind high temperature sintering, become the low thermal conductance material of high thermal resistance of porous, during making, this variable characteristic press the rated operational current of fire-resisting cable can reach 1.15 times more than that conventional model respective cross-section is amassed, and can be competent at 800 ℃ high temperature during calcination, ampacity is big.Aluminium oxide after armouring tape and steel wire and the burning is formed duricrust and is had enough resistance to compressions, impact resistance, and external force resistance is strong.Core insulating material property retention after high flame retardant, fire-resistant, the anti-water tree medium-pressure power cable burning (90min) is good, does not influence its normal power supply, can upgrade filler proper period arrangement personnel in the future, repairs sheath and can recover as usual.Cable has excellent high flame retardant, fire-resistant, water tree resistant property, be suitable for, fire resistance rating demanding place use fire-retardant in skyscraper, tunnel, oil field, power station, power plant, chemical industry, mine, large-scale public place of entertainment, physical culture place, large-scale hotel etc., safe and reliable, long service life.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Among the figure: 1-conductor, 2-conductor shield, 3-insulating barrier, 4-insulation screen, 5-copper strips screen, 6-filler, 7-oxygen barrier layer, 8-separation sleeve, 9-armour, 10-flame retardant coating, 11-oversheath.
Embodiment
Claims (4)
1. a high flame retardant, fire-resistant, anti-water are set medium-pressure power cable, the cable core and the sheath that comprise shielding insulation core stranding, it is characterized in that described shielding insulation core is to set gradually conductor shield, insulating barrier, insulation screen, copper strips screen with water tree resistant property to constitute on conductor, be provided with filling in the cable core, be provided with oxygen barrier layer, separation sleeve, armour, flame retardant coating on the cable core successively, on flame retardant coating, extrude the low smoke halogen-free flame-retardant polyolefin oversheath.
2. high flame retardant according to claim 1, fire-resistant, anti-water tree medium-pressure power cable is characterized in that described armour is made of steel band and wire armoring.
3. high flame retardant according to claim 1, fire-resistant, anti-water tree medium-pressure power cable is characterized in that described oxygen barrier layer and flame retardant coating are made of the high thermal conducting material of low thermal resistance.
4. high flame retardant according to claim 1, fire-resistant, anti-water tree medium-pressure power cable is characterized in that described insulating barrier is the crosslinked polyethylene insulation material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020590483 CN201859687U (en) | 2010-10-25 | 2010-10-25 | High flame-retardant, fire-resistant and water tree-resistant medium voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020590483 CN201859687U (en) | 2010-10-25 | 2010-10-25 | High flame-retardant, fire-resistant and water tree-resistant medium voltage power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201859687U true CN201859687U (en) | 2011-06-08 |
Family
ID=44105488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020590483 Expired - Fee Related CN201859687U (en) | 2010-10-25 | 2010-10-25 | High flame-retardant, fire-resistant and water tree-resistant medium voltage power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201859687U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102903447A (en) * | 2012-11-08 | 2013-01-30 | 焦作市宝丰电缆有限公司 | 6-35 KV mechanical impact resistance three-core fireproof power cable |
| CN103137264A (en) * | 2013-03-26 | 2013-06-05 | 金杯电工衡阳电缆有限公司 | Environment-friendly medium voltage power supply cable for rail transit |
| CN103165240A (en) * | 2011-12-12 | 2013-06-19 | 上海上力电线电缆有限公司 | Capacity-increasing, energy-saving and inflaming-retarding power cable |
| CN103295678A (en) * | 2013-06-28 | 2013-09-11 | 无锡市新阳光电缆有限公司 | Cross-linked polyethylene insulated power cable |
-
2010
- 2010-10-25 CN CN 201020590483 patent/CN201859687U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165240A (en) * | 2011-12-12 | 2013-06-19 | 上海上力电线电缆有限公司 | Capacity-increasing, energy-saving and inflaming-retarding power cable |
| CN102903447A (en) * | 2012-11-08 | 2013-01-30 | 焦作市宝丰电缆有限公司 | 6-35 KV mechanical impact resistance three-core fireproof power cable |
| CN103137264A (en) * | 2013-03-26 | 2013-06-05 | 金杯电工衡阳电缆有限公司 | Environment-friendly medium voltage power supply cable for rail transit |
| CN103137264B (en) * | 2013-03-26 | 2016-02-17 | 金杯电工衡阳电缆有限公司 | A kind of track traffic environment-friendly type medium-pressure electricity supply cable |
| CN103295678A (en) * | 2013-06-28 | 2013-09-11 | 无锡市新阳光电缆有限公司 | Cross-linked polyethylene insulated power cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110608 Termination date: 20151025 |
|
| EXPY | Termination of patent right or utility model |