CN202084336U - Surging type thermal balance low pressure power cable - Google Patents
Surging type thermal balance low pressure power cable Download PDFInfo
- Publication number
- CN202084336U CN202084336U CN2011201545267U CN201120154526U CN202084336U CN 202084336 U CN202084336 U CN 202084336U CN 2011201545267 U CN2011201545267 U CN 2011201545267U CN 201120154526 U CN201120154526 U CN 201120154526U CN 202084336 U CN202084336 U CN 202084336U
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- cable
- core
- power cable
- cooling pipe
- metal
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Abstract
The utility model relates to a surging type thermal balance low pressure power cable, suitable to be laid on a power transmission and distribution line with alternating current of 50Hz and rated voltage of 0.6/1 KV or less. The surging type thermal balance low pressure power cable comprises a cable core with three cores or four cores with equal diameter and a sheath, wherein the cable core is wrapped by a water proof layer added with a plasticizing layer and wrapped longitudinally by a metal plastic film, the outside of the water proof layer is wrapped by a metal cooling pipe in a manner of embossing uniform package, the both enclosing ends of the cooling pipe are filled with liquid coolant and connected with air chambers externally, and between the outermost sheath and the cooling pipe there is provided with an inflaming retarding material filling layer. When local cable is overheated by fire burning around the cable, the liquid coolant surges inside the cooling pipe, thereby eliminating local high temperature caused by flame and enabling the cable to work with lasting normal state; secondly, the metal cooling pipe can also be used as a neutral core (N core) or an earth core (E core), thereby greatly reducing required cost.
Description
Technical field
The utility model relates to a kind of formula heat balance lv power cable that springs up.Being applicable to fixedly is laid in exchanges 50HZ, on 0.6/1 kilovolt of rated voltage and the following electric line.
Background technology
Lv power cable has single core and multicore, and commonly used is 3,4,5 cores, and wherein 4,5 core conductors divide uiform section and unequal section.
Along with the appearance of the big groups of building in city, the fire-retardant fireproof of power cable requires to grow with each passing day, present low pressure 0.6/1KV level and following fire resistant flame retardant cable, though early exploitation is arranged, its cost and the degree of reliability be defectiveness still.
The utility model design concept of breaking the normal procedure, promptly do not 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, catching fire as everyone knows, its zone is local for cable, and ignition temperature can be up to eight, 900 degree.But whole cable length still is in normality, how the high temperature of part 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 lv 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 lv power cable that springs up is provided, comprise isometrical three cores or four-core cable core and sheath, described cable core outsourcing one deck adds the watertight composition of plasticizing layer with the vertical bag of metal plastic film, watertight composition overcoat one metal cooling-pipe, adopt the embossing turnkey, the conductive resistance of metal cooling-pipe should satisfy the requirement of this cable N core or E core, fill cooling fluid and external air chamber in the two ends sealing of cooling water pipe, outermost is a sheath, and the flame-proof material packed layer is arranged between sheath and cooling water pipe.
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 to be provided with watertight composition and metal cools pipeline in its periphery, 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, eliminated the localized hyperthermia that flame brought, make cable when catching fire, still can keep lasting normality work, secondly, metal cooling-pipe can be used as center line (N core) or the required cost of ground wire (E core) the event reduction significantly again.
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-watertight composition; 3-cooling water pipe, liquid
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, the utility model comprises isometrical three core cable core and sheaths, wherein, described isometrical three core cable cores, 1 outsourcing one deck watertight composition 2, the vertical bag of these watertight composition 2 usefulness metal plastic films adds the plasticizing layer, the metal cooling-pipe of making by aluminium or copper conductive material at watertight composition 2 overcoats one 3, cooling water pipe 3 adopts the embossing turnkey, the two ends sealing of cooling water pipe 3, in fill cooling fluid and external gas chamber volume, cooling fluid is formed by congealed fat and impregnating fluid modulation, is filled with fire-retardant packed layer 4 between cooling water pipe and outer jacket, and outermost layer is a sheath 5.
In the present embodiment, 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 lv power cable, comprise isometrical three cores or four-core cable core and sheath, it is characterized in that: described cable core outsourcing one deck adds the watertight composition of plasticizing layer with the vertical bag of metal plastic film, watertight composition overcoat one metal cooling-pipe, adopt the embossing turnkey, fill cooling fluid and external air chamber in the two ends sealing of cooling water pipe, outermost is a sheath, and the flame-proof material packed layer is arranged between sheath and cooling water pipe.
2. the formula heat balance lv power cable that springs up according to claim 1, it is characterized in that: described cooling water pipe is made by aluminium or copper conductive material, and the cooling fluid of depositing in cooling water pipe is formed by congealed fat and impregnating fluid modulation.
3. the formula heat balance lv power cable that springs up according to claim 1 is characterized in that: described fire-retardant encapsulant layer 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 |
|---|---|---|---|
| CN2011201545267U CN202084336U (en) | 2011-05-16 | 2011-05-16 | Surging type thermal balance low pressure power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201545267U CN202084336U (en) | 2011-05-16 | 2011-05-16 | Surging type thermal balance low pressure power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202084336U true CN202084336U (en) | 2011-12-21 |
Family
ID=45344958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201545267U Expired - Fee Related CN202084336U (en) | 2011-05-16 | 2011-05-16 | Surging type thermal balance low pressure power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202084336U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107967959A (en) * | 2017-11-12 | 2018-04-27 | 无锡鑫宏业特塑线缆有限公司 | High-power cooling type direct-current charging post cable and its manufacture method |
-
2011
- 2011-05-16 CN CN2011201545267U patent/CN202084336U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107967959A (en) * | 2017-11-12 | 2018-04-27 | 无锡鑫宏业特塑线缆有限公司 | High-power cooling type direct-current charging post cable and its manufacture method |
| CN107967959B (en) * | 2017-11-12 | 2024-04-26 | 无锡鑫宏业线缆科技股份有限公司 | High-power cooling type direct-current charging pile cable and manufacturing method thereof |
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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: 20170103 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20160516 |