CN201663004U - Electrified railway 27.5KV cable - Google Patents
Electrified railway 27.5KV cable Download PDFInfo
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- CN201663004U CN201663004U CN 201020168960 CN201020168960U CN201663004U CN 201663004 U CN201663004 U CN 201663004U CN 201020168960 CN201020168960 CN 201020168960 CN 201020168960 U CN201020168960 U CN 201020168960U CN 201663004 U CN201663004 U CN 201663004U
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Abstract
The utility model discloses an electrified railway 27.5KV cable, which sequentially comprises a cable core, an inner shield layer, an insulation layer, an outer shield layer and an outer sheath from inside to outside. A semiconductor waterproof tape, a metal shield layer, an insulation sleeve, an aluminum wire armour layer, a low-smoke halogen-free flame retardant glass fiber tape are sequentially arranged between the outer shield layer and the outer sheath from inside to outside. The electrified railway 27.5 KV cable has the advantages that the electrified railway enhances longitudinal waterproof function of the cable, avoids water leakage even though the cable is soaked in water for a long period of time, simultaneously leads the insulation sleeve to have certain insulation performance when the cable runs normally, leads the armour layer to compensate shortages that the metal shield layer can not realize passing of all short-circuit current, and to enhance mechanical tensile strength of the cable in construction process, prevents biting of mice and the like animals, and leads the low-smoke halogen-free flame retardant glass fiber tape to enhance halogen-free low-smoke flame retardant performance of the cable.
Description
Technical field
The utility model relates to a kind of cable, specifically, relates to electric railway 27.5KV cable.
Background technology
In recent years, along with developing rapidly of China's electric railway construction, China railways operation mileage has reached 7.19 ten thousand kilometers, occupies third place in the world, Asia first.Developing goal according to national Mid-term and Long-term Plan of the Railway Network: to the year two thousand twenty, the china railway revenue kilometres reach 100,000 kilometers, 1.2 ten thousand kilometers of speed rails, main busy trunk lines realizes separating lines for passenger and freight, complex line rate and electrochemical rate all reach 50%, and transport capacity satisfies the national economy and social development needs.As the interim target of medium-term and long-term plans, by 2010, china railway operation mileage reached about 8.5 ten thousand kilometers, wherein Line for Passenger Transportation is about 0.5 ten thousand kilometers, 3.5 ten thousand kilometers of multiple lines, begin to take shape passenger-traffic system and freight logistics system fast by electrified 3.5 ten thousand kilometers.
Existing electric railway 27.5KV cable is followed successively by cable core, internal shield, insulating barrier, outer shielding layer, oversheath from inside to outside, the cable of this structure exists vertical waterproof ability also relatively poor, being laid on the field bitten by animal such as mouse to occur damaged, machinery tension insufficient strength might be broken problems such as cable in construction.
The utility model content
The purpose of this utility model is to provide electric railway 27.5KV cable, can solve effectively that the existing vertical waterproof ability of electric railway 27.5KV cable is poor, tensile strength is not enough, can not satisfy the big problem of electric railway side short circuit current.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions: electric railway 27.5KV cable, be followed successively by cable core, internal shield, insulating barrier, outer shielding layer, oversheath from inside to outside, from inside to outside also comprise semiconductor waterstop, metal screen layer, separation sleeve, aluminium wire armour, low-smoke non-halogen flame-retardant glass fiber tape between described outer shielding layer and the oversheath.
Preferably, also be provided with aluminium-plastic tape between described metal screen layer and the separation sleeve; Can better reach waterproof requirement.
Preferably, metal screen layer is the copper wire screen; Be well positioned to meet the big requirement of 27.5KV side short circuit current.
Preferably, described aluminium wire armour is circle aluminium wire armour; Effect is the aluminium wire armour preferably.
Optionally, described aluminium wire armour is flat aluminium wire armour; Can further dwindle the aluminium wire armour of the outside diameter of cable.
Compared with prior art, the utility model has the advantages that: add the semiconductive waterstop, separation sleeve, strengthen vertical waterproof action of cable, cable is immersed in the water for a long time can not seep water yet, separation sleeve has certain insulation property under the normal operation of cable simultaneously, and under the situation of conductor and the puncture of copper wire screen, guarantee that separation sleeve also punctures immediately, make copper wire and aluminium wire bear and evacuate rapidly the transient fault short circuit current jointly, guaranteed that unexpected cable insulation of breakdown point and sheath are not subjected to the damage of high temperature, the aluminium wire armour does not satisfy the deficiency that whole short circuit currents pass through except remedying metal screen layer, can also increase the mechanical tensile strength of cable in work progress, and can prevent biting of animal such as mouse, the low-smoke non-halogen flame-retardant glass fiber tape strengthens the LSOH anti-flaming performance of cable.
Description of drawings
Fig. 1 is the structural representation of the utility model electric railway 27.5KV cable.
Embodiment
Consult the embodiment of Fig. 1 for the utility model electric railway 27.5KV cable, electric railway 27.5KV cable, be followed successively by cable core 1, internal shield 2, insulating barrier 3, outer shielding layer 4, semiconductor waterstop 5, copper wire screen 6, aluminium-plastic tape 7, separation sleeve 8, circle aluminium wire armour 9, low-smoke non-halogen flame-retardant glass fiber tape 10, oversheath 11 from inside to outside, described round aluminium wire armour 9 also can be flat aluminium wire armour 9.
The oversheath 11 of cable passes through tunnel with a varied topography at cable on the one hand for extruding low smoke and zero halogen or low smoke and low halogen polyethylene oversheath 11, and personnel are convenient escape when cable fault or fire, accomplishes environmental protection; Cable possibility long term exposure is in air on the other hand, and lasting sunshine and wind and weather adopt the oversheath 11 of this material to have the aging function of antisum.
The above only is a specific embodiment of the utility model, but technical characterictic of the present utility model is not limited thereto, any those skilled in the art is in field of the present utility model, and variation of being done or modification all are encompassed among the claim of the present utility model.
Claims (5)
1. electric railway 27.5KV cable, be followed successively by cable core (1), internal shield (2), insulating barrier (3), outer shielding layer (4), oversheath (11) from inside to outside, it is characterized in that: from inside to outside also comprise semiconductor waterstop (5), metal screen layer, separation sleeve (8), aluminium wire armour (9), low-smoke non-halogen flame-retardant glass fiber tape (10) between described outer shielding layer (4) and the oversheath (11).
2. electric railway 27.5KV cable as claimed in claim 1 is characterized in that: also be provided with aluminium-plastic tape (7) between described metal screen layer and the separation sleeve (8).
3. electric railway 27.5KV cable as claimed in claim 1 is characterized in that: metal screen layer is copper wire screen (6).
4. as each described electric railway 27.5KV cable in the claim 1 to 3, it is characterized in that: described aluminium wire armour (9) is circle aluminium wire armour (9).
5. as each described electric railway 27.5KV cable in the claim 1 to 3, it is characterized in that: described aluminium wire armour (9) is a flat aluminium wire armour (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020168960 CN201663004U (en) | 2010-04-22 | 2010-04-22 | Electrified railway 27.5KV cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020168960 CN201663004U (en) | 2010-04-22 | 2010-04-22 | Electrified railway 27.5KV cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201663004U true CN201663004U (en) | 2010-12-01 |
Family
ID=43233423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020168960 Expired - Fee Related CN201663004U (en) | 2010-04-22 | 2010-04-22 | Electrified railway 27.5KV cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201663004U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943219A (en) * | 2014-04-26 | 2014-07-23 | 芜湖航天特种电缆厂 | Flat signal transmission cable |
| CN106531325A (en) * | 2016-12-30 | 2017-03-22 | 无锡江南电缆有限公司 | Split conductor-type water-blocking power cable with built-in optical fibers |
| CN106531305A (en) * | 2016-12-30 | 2017-03-22 | 无锡江南电缆有限公司 | Multilayer segmented conductor type water-blocking power cable with built-in cable |
-
2010
- 2010-04-22 CN CN 201020168960 patent/CN201663004U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943219A (en) * | 2014-04-26 | 2014-07-23 | 芜湖航天特种电缆厂 | Flat signal transmission cable |
| CN106531325A (en) * | 2016-12-30 | 2017-03-22 | 无锡江南电缆有限公司 | Split conductor-type water-blocking power cable with built-in optical fibers |
| CN106531305A (en) * | 2016-12-30 | 2017-03-22 | 无锡江南电缆有限公司 | Multilayer segmented conductor type water-blocking power cable with built-in 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: 20101201 Termination date: 20150422 |
|
| EXPY | Termination of patent right or utility model |