CN201072668Y - Water blocking electric cable - Google Patents
Water blocking electric cable Download PDFInfo
- Publication number
- CN201072668Y CN201072668Y CNU2007200457366U CN200720045736U CN201072668Y CN 201072668 Y CN201072668 Y CN 201072668Y CN U2007200457366 U CNU2007200457366 U CN U2007200457366U CN 200720045736 U CN200720045736 U CN 200720045736U CN 201072668 Y CN201072668 Y CN 201072668Y
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- China
- Prior art keywords
- cable
- water
- resistant
- core
- blocks water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The utility model is an improvement for water-resistant cable, which is characterized in that: the cable is intertwisted by an isolated water-resistant cable core, filled with universal cable and formed with jacket. The isolated water-resistant cable core comprises a conductor, an isolated structure, semi-conducting water-resistant tape and a seamless metallic sheath in turn, which simplifies the water-resistant structure and enhances the constancy for water-resistant. The outer side of the cable core is provided with universal cable structure, which has little affect on thermal discharging, so as to ensure the life of the cable and balance the cable transmission power, and the transmission power of the existing cable can also be increased by around 10 percent. In addition, the inner water-resistant structure can guarantee the water-resistant impact although the outer layer of the cable is damaged.
Description
Technical field
Utility model is the improvement to the cable that blocks water, and relates in particular to the stop water of cable.
Background technology
For improving the water preventing ability of cable, people take to apply material water-proof material usually outside the cable core of cable, form the cable that blocks water, its basic structure as shown in Figure 1, by stranded conductor 1, be followed successively by conductor screen 2, XLPE insulation 3, insulation shielding 4, copper strips shielding 5 composition cores outward, three stranded fillings of core block water and fill 6, extrude PE water blocking layer 7 outward, metal armouring 8, PE water blocking layer 9, PVC sheath 10 is formed.Yet material water-proof material is with respect to common insulating material, and thermal resistance is relatively large, and the cable core three layers of stop water that filling, 2 PE water blocking layers are formed that block water have outward seriously hindered the normal heat radiation of cable.Cable in use unavoidably will produce heat, and a plurality of water blocking layers are added in the cable conductor outside, has reduced the heat dispersion during cable uses, and causes the cable caloric value to increase.Increasing of cable caloric value can cause the reduction of cable transmission power on the one hand; Can make the core insulation accelerated ageing of being heated on the other hand.Ageing of insulation, block-water performance reduces, and moisture enters insulation, can cause insulation to produce water tree, and insulation life is shortened; Secondly, can vertically flow into cable joint along insulation after moisture enters, cause cable joint to be blasted.Besides, the multilayer stop water is in cable core outside, and in the cable laying process, the damage that sheath is difficult to avoid or break also can reduce block-water effect.Though people did many improvement to the cable stop water, for example:
The disclosed split-phase type water-proof cross-linked cable of Chinese patent CN2509686, the water blocking layer of the insulated wire cores that blocks water adopts the multilayer stop water, and wherein moisture-proof layer adopts vertical pack arrangement, and block-water effect is unreliable, and the multilayer stop water influences the normal heat radiation of core equally.
The disclosed moisture-proof anticorrosive power cable that blocks water of Chinese patent CN2609127, still in the outside of cable core, above-mentioned defective still exists waterproof construction as previously mentioned.
The disclosed radially integrated water stop cable that vertically reaches of Chinese patent CN2847471, its core only adopts two layers of semiconductive waterstop, and its block-water effect instability can not be supported the infiltration of meeting long-term water, and the persistence that blocks water is poor; Secondly, cable core increases stop water outward, still has heat dissipation problem.
In addition, the metal copper strips in the existing cable that blocks water only plays ground connection and shielding action on function, and does not have the effect that blocks water.
Therefore, prior art substantially all is to adopt in the cable core outside to apply the multilayer stop water, and aforementioned deficiency is effectively solved so far.Apply the semiconductive waterstop though have on core, only this waterstop lasting effect that blocks water is undesirable, also still applies water blocking layer outside cable core more for this reason, and above-mentioned like this defective still exists.The heat dissipation problem that stop water causes is not looked for a long time at cable industry.
The utility model content
The utility model purpose is to overcome the deficiency of above-mentioned prior art, and a kind of existing water preventing ability preferably and persistence are provided, again the cable that blocks water of the normal heat radiation of little effect cable.
The utility model purpose realizes that main improvement is to make in the stop water of cable to move on the insulated wire cores, and simplifies stop water, and cable core is outer to adopt original common structure, thereby overcomes the deficiencies in the prior art, realizes the utility model purpose.Specifically, the utility model cable that blocks water comprises insulated wire cores twisted cable core and stop water, it is characterized in that cable by the insulation stranded stranding of core that blocks water, the general filling of filled cable, and sheath is formed; The said insulation core that blocks water is formed by being followed successively by conductor, insulation system, semiconductive waterstop and seamless metal cover.
The said insulation system of utility model according to cable instructions for use difference, can only be an insulating barrier, is used for low-voltage cable; Also can inside and outside insulating barrier, add shielding, be used for middle and high voltage cable.This is a prior art.
Said seamless metal cover can be aluminium cover, aluminum alloy sleeve, also can be plumbous cover, lead alloy cover.Seamless cover can be the light cover, also can be radiation fins, to increase the bending property of cable.
According to cable instructions for use difference, the sheath that cable core is outer can be single jacket structure, also can be interior outer jacket, and the centre adds the metal armouring layer, can also be that other application function occasions require jacket structure, and this belongs to prior art equally.
The utility model cable that blocks water, owing to move on the core in the water blocking layer that thermal resistance is big, and adopt added metal sealing shroud structure, not only simplified stop water, and the persistence that blocks water is good, and help core heat radiation, cable conductor is outer to adopt the common construction of cable, little to cable heat radiation influence, helps guaranteeing cable useful life, keep the cable transmission power not reduce substantially, existing outer water blocking layer structure can improve through-put power about 10%; Secondly, interior stop water is not even the protective coverings of cable damage can influence the cable block-water effect yet.The utility model cable that blocks water both can be done low-voltage cable, also can do high-tension cable.The seamless metal cover had both had ground connection, shielding properties, also had water stop function.In addition, adopt above-mentioned stop water, can adopt common cable structure, filling and external protective material, reduce the cable sheath number, not only reduced cable cost, and helped distributing of cable heat, oversheath adopts polar polymer PVC, and its hydrophily characteristics also make under the cable power transmission low state, electric current reduces, the generation heat reduces, and sheath absorbs moisture, when the transmission of electricity peak value, its hydrophily can make that the PVC heat radiation is faster, helps the heat radiation of cable.
Below in conjunction with an embodiment, further specify utility model.
Description of drawings
Fig. 1 is the prior art construction of cable schematic diagram that blocks water.
Fig. 2 is the utility model construction of cable schematic diagram that blocks water.
Embodiment
Embodiment: referring to Fig. 2, the utility model cable that blocks water by three stranded strandings of the core that blocks water, is filled with common filling 13, is followed successively by PVC inner sheath 14 outward, metal armouring layer 8, PVC oversheath 10.The core that blocks water, by being followed successively by stranded conductor 1, conductor screen 2, XLPE insulation 3, the shielding 11 that blocks water of insulation shielding 4, semiconductive, seamless aluminium cover 12 is formed.
In addition, the cable core outer shell structure can change according to the cable use occasion; The core insulation system can also adopt the general low-voltage structure, and insulating barrier is promptly only arranged; For improving the cable flexibility, the seamless metal cover can also adopt seamless bellows.
Claims (2)
1. the cable that blocks water comprises insulated wire cores twisted cable core and stop water, it is characterized in that cable by the insulation stranded stranding of core that blocks water, the general filling of filled cable, and sheath is formed; The said insulation core that blocks water is formed by being followed successively by conductor, insulation system, semiconductive waterstop and seamless metal cover.
2. according to the described cable that blocks water of claim 1, it is characterized in that said seamless metal cover is seamless bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200457366U CN201072668Y (en) | 2007-08-29 | 2007-08-29 | Water blocking electric cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200457366U CN201072668Y (en) | 2007-08-29 | 2007-08-29 | Water blocking electric cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201072668Y true CN201072668Y (en) | 2008-06-11 |
Family
ID=39551225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200457366U Expired - Fee Related CN201072668Y (en) | 2007-08-29 | 2007-08-29 | Water blocking electric cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201072668Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708983A (en) * | 2012-06-26 | 2012-10-03 | 江苏海达电缆有限公司 | Anti-rat, anti-termite, flame-retardant and environmentally friendly power cable |
| CN102708971A (en) * | 2012-06-23 | 2012-10-03 | 南通米兰特电气有限公司 | Anti-electromagnetic interference control cable |
| CN102751039A (en) * | 2012-07-11 | 2012-10-24 | 江苏海达电缆有限公司 | Coaxial cable |
| CN103700442A (en) * | 2013-12-04 | 2014-04-02 | 江苏南瑞淮胜电缆有限公司 | Water-blocking medium voltage aluminum alloy power cable |
-
2007
- 2007-08-29 CN CNU2007200457366U patent/CN201072668Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708971A (en) * | 2012-06-23 | 2012-10-03 | 南通米兰特电气有限公司 | Anti-electromagnetic interference control cable |
| CN102708983A (en) * | 2012-06-26 | 2012-10-03 | 江苏海达电缆有限公司 | Anti-rat, anti-termite, flame-retardant and environmentally friendly power cable |
| CN102751039A (en) * | 2012-07-11 | 2012-10-24 | 江苏海达电缆有限公司 | Coaxial cable |
| CN103700442A (en) * | 2013-12-04 | 2014-04-02 | 江苏南瑞淮胜电缆有限公司 | Water-blocking medium voltage aluminum alloy power cable |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080611 Termination date: 20120829 |