CN202084338U - Surging thermal balance high-voltage power cable - Google Patents
Surging thermal balance high-voltage power cable Download PDFInfo
- Publication number
- CN202084338U CN202084338U CN2011201545214U CN201120154521U CN202084338U CN 202084338 U CN202084338 U CN 202084338U CN 2011201545214 U CN2011201545214 U CN 2011201545214U CN 201120154521 U CN201120154521 U CN 201120154521U CN 202084338 U CN202084338 U CN 202084338U
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- pipe
- metal
- power cable
- cooling
- voltage power
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- Expired - Fee Related
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Abstract
The utility model relates to a surging thermal balance high-voltage power cable, which is applicable to being fixedly laid on power transmission and distribution lines with the voltage of 66 kilovolts or above. The surging thermal balance high-voltage power cable comprises a conductor, a shielding layer, an insulation layer and a sheath, wherein the conductor is a single-core stranded conductor and wrapped by the shielding layer and the insulation layer, a metal waterproof embossing pipe and a plurality of metal cooling pipes are arranged between the insulation layer and the sheath, flame retarding filling materials are filled in gaps surrounding the metal cooling pipes and the waterproof embossing pipe, each circular metal cooling pipe is in a lapped manner with two ends closed, filled with cooling liquid and externally connected with air chambers, and the sheath is outermost. The surging thermal balance high-voltage power cable has the advantages that when local superheat of the cable is caused by a fire surrounding the cable, the cooling liquid surges in each cooling pipe to eliminate local high temperature caused by flames, so that the cable can be kept in sustained normal operation.
Description
Technical field
The utility model relates to a kind of formula heat balance high voltage power cable that springs up.Be applicable on fixedly be laid in 66 kilovolts and the above transmission ﹠ distribution route.
Background technology
The basic structure of power cable is made up of core (conductor), insulating barrier, screen and protective layer four parts, wherein:
(1) core: core is the current-carrying part of power cable, is used for transmission of electric energy, is the major part of power cable.
(2) insulating barrier: insulating barrier is to be isolated from each other on electric between core and the earth and out of phase core, guarantees power delivery, is indispensable part in the power cable structure.
(3) screen: 6KV and above power cable generally all have conductor shield and insulation screen.
(4) protective layer: the effect of protective layer is that the protection power cable is avoided the intrusion of introduced contaminants and moisture, and prevents that external force from directly damaging power cable.
Low-voltage current just can enter among the user during high voltage must become by transformer station.Along with the urban power consumption increases severely, for saving energy loss, high voltage power cable enters the down town load by transformer station.For improving safe and reliable index, the fire-retardant and fire-resistant requirement of cable also day by day all increases.It is worth noting, add various fire retardants or compounding aid in the insulating material, must cause electric and decline mechanical performance, this is unallowed for high voltage power cable.The present fire prevention measure that adopts of 66KV level and above power cable or for burying sand or be fire prevention groove box, though can reach certain effect, because of thermal resistance increases on foot, the normal use of the violent influence of the ampacity range of decrease.
The utility model design concept of breaking the normal procedure is neither set about from the fire resistance of insulating material, also not from outside protect fireprotection layer, but have in mind from the heat balance principle of cable.As everyone knows, catching fire, its zone is local for cable, ignition temperature can be up to eight, 900 degree, but whole cable length still is in normality, how the high temperature of part is spread to integral body, making heat absorption (high temperature place) and the balance that heat radiation (normality place) reaches heat is design difficulty of the present utility model.
The applicant also considers in the laying-out of power cable, often has " hot bottleneck " and the restriction cable uses specified ampacity, reduced the actual motion ampacity of cable.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of formula heat balance high voltage power cable that springs up is provided, and when high temperature of fire, the heat conduction by cooling fluid, convection current form and spring up, and alleviate the excessive invasion and attack of flame high temperature to cable.
The technical scheme that the utility model adopted is: a kind of formula heat balance high voltage power cable that springs up, comprise conductor, insulating barrier, screen and sheath, wherein, described conductor is single core stranded conductor, its outsourcing screen and insulating barrier, outside insulation screen, be provided with metal waterproof embossing pipe, on the embossing pipe, be wound with some metal cooling-pipe, be filled with fire-retardant packing material in the space around metal cooling-pipe and the waterproof embossing pipe, metal cooling-pipe is the circular wrapped mode that adopts, the sealing of two ends of metal cooling-pipe, in fill cooling fluid and external air chamber, outermost is a sheath.
On the such scheme basis, described metal waterproof embossing pipe and metal cooling-pipe are made by aluminium or copper product, the double as earth electrode, and the cooling fluid of depositing in the metal cooling-pipe is formed by congealed fat and impregnating fluid modulation.
Described fire-retardant packing material is expansion type efficient flame-retarding agent and metal tape that covers perforation or metal wire knitted band.
Heat balance mechanism of the present utility model is: for guaranteeing the stable of insulating performance of cable, in the related cable kind of the utility model, its inner core remains unchanged, what become only is in some metal cooling-pipe of the peripheral laying of its metal embossing guard tube, be filled with cooling fluid in cooling pipe, the two ends of pipeline are enclosed type and external certain gas chamber volume.When the cable local overheating, heat elder generation is by heat conduction, the convection current of cooling fluid herein, heat is transmitted to two ends, play liter along with temperature, the liquid at this place is vaporized back pressure and increases suddenly, and liquid is on every side passed to both sides, and the air chamber pressure of cable two ends is increased in succession, when this force value cooling fluid that (reduces pressure owing to expanding) during greater than ignition zone pipeline hole air pressure will oppositely move, come back to ignition zone.This process is gone round and begun again and is just formed cooling fluid " springing up ", springs up and has eliminated the localized hyperthermia that flame brought, and cable still can be worked when catching fire lastingly normally.
The beneficial effects of the utility model are: when causing the cable local overheating when catching fire around the cable, cooling fluid forms in cooling water pipe and springs up, and has eliminated localized hyperthermia that flame brings, and makes cable still can keep lasting normality work at the place that catches fire.
Description of drawings
Accompanying drawing 1 is a cross-sectional view of the present utility model.
The drawing reference numeral explanation:
1-cable core; 2-metal waterproof embossing pipe;
3-metal cooling-pipe; 4-fire-retardant packed layer;
5-sheath.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
By accompanying drawing 1 as can be known, a kind of formula heat balance high voltage power cable that springs up of the present utility model comprises high-tension cable cable core 1, metal waterproof embossing pipe 2, metal cooling-pipe 3 adopts toroidal, wrapped on the embossing pipe, be filled with fire-retardant packing material 4 in the space around metal cooling-pipe 3 and the metal waterproof embossing pipe 2, the sealing of two ends of metal cooling-pipe 3, in fill cooling fluid and external air chamber, outermost layer is a sheath 5.
In the present embodiment, metal waterproof embossing pipe 2 and metal cooling-pipe 3 are made by aluminium or copper conductive material, but the double as earth electrode; The cooling fluid of depositing in the metal cooling-pipe 3 is formed by congealed fat and impregnating fluid modulation.
Described fire-retardant packing material is expansion type efficient flame-retarding agent and metal tape that covers perforation or metal wire knitted band, further to alleviate the excessive invasion and attack of flame high temperature to cable.
Claims (3)
1. one kind springs up formula heat balance high voltage power cable, comprise conductor, screen, insulating barrier and sheath, it is characterized in that: described conductor is single core stranded conductor, its outsourcing screen and insulating barrier, between insulating barrier and sheath, be provided with metal waterproof embossing pipe and some metal cooling-pipe, be filled with fire-retardant packing material in the space around metal cooling-pipe and the waterproof embossing pipe, metal cooling-pipe is the circular wrapped mode that adopts, the two ends sealing of metal cooling-pipe, in fill cooling fluid and external air chamber, outermost is a sheath.
2. the formula heat balance high voltage power cable that springs up according to claim 1, it is characterized in that: described metal waterproof embossing pipe and metal cooling-pipe are made by aluminium or copper conductive material, the double as earth electrode, the cooling fluid of depositing in the metal cooling-pipe is formed by congealed fat and impregnating fluid modulation.
3. the formula heat balance high voltage power cable that springs up according to claim 1 is characterized in that: described fire-retardant packing material is expansion type efficient flame-retarding agent and metal tape that covers perforation or metal wire knitted band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201545214U CN202084338U (en) | 2011-05-16 | 2011-05-16 | Surging thermal balance high-voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201545214U CN202084338U (en) | 2011-05-16 | 2011-05-16 | Surging thermal balance high-voltage power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202084338U true CN202084338U (en) | 2011-12-21 |
Family
ID=45344960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201545214U Expired - Fee Related CN202084338U (en) | 2011-05-16 | 2011-05-16 | Surging thermal balance high-voltage power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202084338U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254609A (en) * | 2011-05-16 | 2011-11-23 | 上海泰瑞能源科技有限公司 | Surging thermal balance cable |
| CN105448384A (en) * | 2015-12-09 | 2016-03-30 | 中国电力科学研究院 | Power transmission circuit |
-
2011
- 2011-05-16 CN CN2011201545214U patent/CN202084338U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254609A (en) * | 2011-05-16 | 2011-11-23 | 上海泰瑞能源科技有限公司 | Surging thermal balance cable |
| CN102254609B (en) * | 2011-05-16 | 2015-11-25 | 上海泰瑞能源科技有限公司 | Surging thermal balance cable |
| CN105448384A (en) * | 2015-12-09 | 2016-03-30 | 中国电力科学研究院 | Power transmission circuit |
| CN105448384B (en) * | 2015-12-09 | 2023-11-14 | 中国电力科学研究院 | Power transmission line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170118 Address after: 200093 Shanghai military road, Yangpu District, No. 1076 Patentee after: Shanglan Radiation Technology Development Co., Shanghai Address before: 200093 Shanghai military road, Yangpu District, No. 1076 Patentee before: Shanghai Tairui Energy Technology Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20160516 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |