CN103077777A - Rat-proof and termite-proof coaxial cable for grounding ultra-high voltage transmission line - Google Patents
Rat-proof and termite-proof coaxial cable for grounding ultra-high voltage transmission line Download PDFInfo
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- CN103077777A CN103077777A CN2012104547850A CN201210454785A CN103077777A CN 103077777 A CN103077777 A CN 103077777A CN 2012104547850 A CN2012104547850 A CN 2012104547850A CN 201210454785 A CN201210454785 A CN 201210454785A CN 103077777 A CN103077777 A CN 103077777A
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Abstract
The invention provides a rat-proof and termite-proof coaxial cable for grounding an ultra-high voltage transmission line. A conductor shielding layer, an insulating layer, an insulating shielding layer, a semi-conducting tape layer, an outer copper conductor layer and an outer sheath layer wrap outside an inner copper conductor in sequence, wherein the insulating layer is a crosslinked polyethylene insulating layer, and the outer sheath layer is a high-density polyethylene sheath layer. According to the rat-proof and termite-proof coaxial cable for grounding the ultra-high voltage transmission line, provided by the invention, the problem that an electric field of the cable is not even can be solved; a rat-proof and termite-proof function is good; the use is safe and reliable; and the service life is long.
Description
Technical field
The present invention relates to a kind of coaxial cable, the earthy termite-resistant rodent-resistant type of especially a kind of extra high voltage network coaxial cable.
Background technology
Country does not also seek unity of standard to coaxial cable at present, and traditional coaxial cable structure is simple, and its structure is 1) interior copper conductor; 2) polyethylene insulation; 3) outer copper conductor; 4) pe sheath.There is following shortcoming:
1, generally all adopt vinyon as insulating barrier; the polyethylene insulation material bad mechanical property, heat-resisting stable temperature is low, and extra high voltage system cable metal sheath ground connection is extremely important; in the coordinated transposition; coaxial cable connects extra-high-tension cable metallic sheath two ends, forms interconnected protective earthing, in case ground connection occurs coaxial cable; metallic sheath forms path; can produce circulation at metallic sheath, cable generation loss and heating are very large on the ampacity impact of cable.Causing simultaneously insulating thermal aging punctures.Cause large area blackout.Because traditional cable often is subject to mouse and termite bites, extra-high-tension cable metallic sheath two ends produce direct ground connection, cause above extra high voltage system fault.
2, conductor and insulating barrier be without semiconductive shielding layer, non-uniform electric; During extra-high-tension cable generation ground short circuit, coaxial cable conductor will bear most of short circuit current, the instantaneous very high induction voltage that bears that insulate, and the inhomogeneous insulation of traditional cable electric field, the partial breakdown phenomenon can insulate.
During 3 extra-high-tension cable generation ground short circuit, coaxial cable conductor will bear most of short circuit current, and the insulation temperature raises rapidly, and the traditional cable polyethylene insulation can only allow 160 ℃.
4, sheath adopts the common polythene material, and cable often is subject to mouse and termite bites.
Therefore need to develop as early as possible the novel coaxial cable that can really conform and need.
Summary of the invention
Technical problem to be solved by this invention provides the earthy termite-resistant rodent-resistant type of extra high voltage network coaxial cable, can solve the inhomogeneous problem of cable electric field, and the termite-resistant rodent-resistant better function is safe and reliable, the life-span is long.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: the earthy termite-resistant rodent-resistant type of a kind of extra high voltage network coaxial cable, interior copper conductor are enclosed with conductor shield, insulating barrier, insulation screen, semiconductor belt, outer copper conductor layer and external sheath layer outward successively.
Insulating barrier is crosslinked polyetylene insulated layer.
External sheath layer is the high density polyethylene (HDPE) restrictive coating.
The earthy termite-resistant rodent-resistant type of extra high voltage network provided by the invention coaxial cable, beneficial effect is as follows:
1, to adopt circle to press stranded for interior copper conductor, conductor structure closely, rationally, easy-to-connect.
2, insulating barrier adopts crosslinked polyetylene insulated layer, reaches electric and the excellent purpose of physical property, solves the even purpose of cable electric field.
3, the design of semiconductor belt reaches the outer copper conductor of protection to the insulation harm purpose, has played simultaneously good uniform electric field effect.
4, external sheath layer adopts the high density polyethylene (HDPE) restrictive coating, reaches the termite-resistant rodent-resistant purpose, and is safe and reliable, the life-span is long, and the damaged by rats ant that can fixedly be laid in evil is regional.
5, conductor structure of the present invention is reasonable in design, and inner and outer conductor adopts concentric stranding, conductor easy-to-connect, cable laying and safeguard simple and direct.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is structural representation of the present invention.
Fig. 2 is production technological process of the present invention.
Embodiment
As shown in Figure 1, the earthy termite-resistant rodent-resistant type of a kind of extra high voltage network coaxial cable, interior copper conductor 1 outer conductor shield 2, insulating barrier 3, insulation screen 4, semiconductor belt 5, outer copper conductor layer 6 and the external sheath layer 7 of being enclosed with successively.
Insulating barrier 3 is crosslinked polyetylene insulated layer.
Production technology of the present invention as shown in Figure 2, each step Attention Points is as follows:
1, interior copper conductor 1
Interior copper conductor 1 forms (purity of copper 〉=99.97%) by the naked annealed copper wire that meets the GB/T3956 regulation.In the manufacturing engineering of cable conductor, at first make oxygen-free copper bar by the up-drawing method production line of import, by the import big drawing machine drawing single line of continuous annealing.
Interior copper conductor 1 presses moulding at strand layered processed, has guaranteed the tight and Stability Analysis of Structures of conductor.Press coefficient and be not less than 0.9, conductive surface is bright and clean, without burr, the sharp edge of greasy dirt, not damaged shielding and insulation, without the single line of projection or fracture.Cross-sectional area of conductor is 95/95mm2 ~ 240/240 mm2.
The D.C. resistance of cable conductor in the time of 20 ℃ satisfies the GB/T3956-97 regulation.
2, extrude crosslinking process
3, conductor shield 2
Extruding semi-conductive layer should be coated on the conductor equably, and smooth surface is without obvious twisted wire burr, without wedge angle, particle, burn or abrasive vestige.When peeling off conductor shield 2, semi-conductive layer should not cause having card to stay phenomenon between the conductor strand.
The conductor screen nominal thickness is 0.8 mm, and minimum thickness should be not less than 0.48 mm.
The resistivity of conductor shield 2 is no more than 1000 Europe rice.
4, insulating barrier 3
Insulating barrier 3 adopts cross-linked polyethylene insulating material, and the insulation nominal thickness is 4.5mm, and insulation thickness mean value should be not less than nominal value, and the minimum detect thickness of any point should be not less than 4.2mm, and maximum detect thickness should be not more than 4.8mm.
5, insulation screen 4
The insulation screen 4 crosslinked semi-conductive layer for extruding, semi-conductive layer is coated on insulating surface equably, and the surface should be smooth, without wedge angle, particle, burns or abrasive vestige.
The nominal thickness of insulation screen 4 is: 0.8 mm.Minimum thickness should be not less than 0.48 mm.It is peelable release that insulation screen 4 should be.
The resistivity of insulation screen 4 is not more than 500 Europe rice.
6, the semiconductor belt 5
The wrapped one deck 0.40mm of insulation shielding semiconductor belt 5, the on average rate of putting up of semi-conductive tape should be no less than 15% of bandwidth,
7, outer copper conductor layer 6
Outer copper conductor layer 6 adopts with one heart and twists on insulated wire cores, monofilament strand direction processed is left-hand, and lay ratio is 10～14, and the bad phenomenon such as creek must not appear jumping in monofilament, conductive surface is bright and clean, without burr, the sharp edge of greasy dirt, not damaged insulation, without the single line of projection or fracture.The D.C. resistance of cable conductor in the time of 20 ℃ satisfies the GB/T3956-97 regulation.The outer conductor cross section is 95 square millimeters～240 square millimeters.
8, external sheath layer 7
Sheath material adopts the anti-ant medium density polyethylene of environment protection, rat.Sheath nominal thickness rule are the regulation of 4.0mm.Jacket thickness mean value should be not less than nominal value, and any point minimum thickness should be not less than 85% of nominal value.Sheath outward appearance shall be rounded up, level and smooth, not damaged, the section pore-free.
Claims (3)
1. the earthy termite-resistant rodent-resistant type of an extra high voltage network coaxial cable is characterized in that: outer conductor shield (2), insulating barrier (3), insulation screen (4), semiconductor belt (5), outer copper conductor layer (6) and the external sheath layer (7) of being enclosed with successively of interior copper conductor (1).
2. the earthy termite-resistant rodent-resistant type of extra high voltage network according to claim 1 coaxial cable is characterized in that: insulating barrier (3) is crosslinked polyetylene insulated layer.
3. the earthy termite-resistant rodent-resistant type of extra high voltage network according to claim 1 and 2 coaxial cable, it is characterized in that: external sheath layer (7) is the high density polyethylene (HDPE) restrictive coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104547850A CN103077777A (en) | 2012-11-14 | 2012-11-14 | Rat-proof and termite-proof coaxial cable for grounding ultra-high voltage transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104547850A CN103077777A (en) | 2012-11-14 | 2012-11-14 | Rat-proof and termite-proof coaxial cable for grounding ultra-high voltage transmission line |
Publications (1)
| Publication Number | Publication Date |
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| CN103077777A true CN103077777A (en) | 2013-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104547850A Pending CN103077777A (en) | 2012-11-14 | 2012-11-14 | Rat-proof and termite-proof coaxial cable for grounding ultra-high voltage transmission line |
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| Country | Link |
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| CN (1) | CN103077777A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105575517A (en) * | 2016-02-25 | 2016-05-11 | 杨攀 | High voltage coaxial cable |
| CN116756893A (en) * | 2023-06-16 | 2023-09-15 | 深圳讯道实业股份有限公司 | Power transmission and distribution cable layout and control method applied to industrial and mining control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101071658A (en) * | 2007-05-17 | 2007-11-14 | 上海亚龙工业（集团）有限公司 | Waterproof power cable and its manufacturing method |
| CN201266509Y (en) * | 2008-07-17 | 2009-07-01 | 无锡江南电缆有限公司 | Copper wire sparse winding shielding high-voltage cable |
| CN102360613A (en) * | 2011-10-08 | 2012-02-22 | 江苏亨通电力电缆有限公司 | Copper wire shielded medium voltage optical compound rope and screening device in smart power grids |
| CN102623100A (en) * | 2012-04-28 | 2012-08-01 | 广州南洋电缆有限公司 | Crosslinked polyethylene insulated corrugated steel sheath power cable |
| CN202930124U (en) * | 2012-11-14 | 2013-05-08 | 湖北龙腾红旗电缆(集团)有限公司 | Ratproof and anti-termite type coaxial cable for extra-high voltage electric line grounding |
-
2012
- 2012-11-14 CN CN2012104547850A patent/CN103077777A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101071658A (en) * | 2007-05-17 | 2007-11-14 | 上海亚龙工业（集团）有限公司 | Waterproof power cable and its manufacturing method |
| CN201266509Y (en) * | 2008-07-17 | 2009-07-01 | 无锡江南电缆有限公司 | Copper wire sparse winding shielding high-voltage cable |
| CN102360613A (en) * | 2011-10-08 | 2012-02-22 | 江苏亨通电力电缆有限公司 | Copper wire shielded medium voltage optical compound rope and screening device in smart power grids |
| CN102623100A (en) * | 2012-04-28 | 2012-08-01 | 广州南洋电缆有限公司 | Crosslinked polyethylene insulated corrugated steel sheath power cable |
| CN202930124U (en) * | 2012-11-14 | 2013-05-08 | 湖北龙腾红旗电缆(集团)有限公司 | Ratproof and anti-termite type coaxial cable for extra-high voltage electric line grounding |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105575517A (en) * | 2016-02-25 | 2016-05-11 | 杨攀 | High voltage coaxial cable |
| CN107068272A (en) * | 2016-02-25 | 2017-08-18 | 杨攀 | A kind of high-pressure coaxial cable |
| CN116756893A (en) * | 2023-06-16 | 2023-09-15 | 深圳讯道实业股份有限公司 | Power transmission and distribution cable layout and control method applied to industrial and mining control system |
| CN116756893B (en) * | 2023-06-16 | 2024-01-05 | 深圳讯道实业股份有限公司 | Power transmission and distribution cable layout and control method applied to industrial and mining control system |
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Application publication date: 20130501 |