CN202930124U - Ratproof and anti-termite type coaxial cable for extra-high voltage electric line grounding - Google Patents
Ratproof and anti-termite type coaxial cable for extra-high voltage electric line grounding Download PDFInfo
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- CN202930124U CN202930124U CN 201220598035 CN201220598035U CN202930124U CN 202930124 U CN202930124 U CN 202930124U CN 201220598035 CN201220598035 CN 201220598035 CN 201220598035 U CN201220598035 U CN 201220598035U CN 202930124 U CN202930124 U CN 202930124U
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Abstract
Provided is a ratproof and anti-termite type coaxial cable for extra-high voltage electric line grounding. The outside of an inner copper conductor is successively wrapped by a conductor shielding layer, an insulating layer, an insulating shielding layer, a semiconductor belt layer, an outer copper conductor layer and an oversheath layer; the insulating layer is a crosslinking polyethylene insulating layer; the oversheath layer is a high density polyethylene sheath layer. The ratproof and anti-termite type coaxial cable for extra-high voltage electric line grounding solves the problem that a cable electric field is nonuniform, has good ratproof and anti-termite functions, is safe and reliable to use and has a long service life.
Description
Technical field
The utility model 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 coordinated transposition; coaxial cable connection extra-high-tension cable metallic sheath two ends form 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 in the utility model is to provide 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 scheme that the utility model adopts 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 the extra high voltage network that the utility model provides 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, the utility model conductor structure 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 utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is production technological process of the present utility model.
Embodiment
As shown in Figure 1, the earthy termite-resistant rodent-resistant type of a kind of extra high voltage network coaxial cable, 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.
Insulating barrier 3 is crosslinked polyetylene insulated layer.
Production technology of the present utility model 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 95/95 square millimeter～240/240 square millimeter.
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 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 |
|---|---|---|---|
| CN 201220598035 CN202930124U (en) | 2012-11-14 | 2012-11-14 | Ratproof and anti-termite type coaxial cable for extra-high voltage electric line grounding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220598035 CN202930124U (en) | 2012-11-14 | 2012-11-14 | Ratproof and anti-termite type coaxial cable for extra-high voltage electric line grounding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202930124U true CN202930124U (en) | 2013-05-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220598035 Expired - Fee Related CN202930124U (en) | 2012-11-14 | 2012-11-14 | Ratproof and anti-termite type coaxial cable for extra-high voltage electric line grounding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202930124U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103077777A (en) * | 2012-11-14 | 2013-05-01 | 湖北龙腾红旗电缆(集团)有限公司 | Rat-proof and termite-proof coaxial cable for grounding ultra-high voltage transmission line |
| CN104464903A (en) * | 2014-12-12 | 2015-03-25 | 宿州永通电缆有限公司 | Cable for high-voltage trunk line |
-
2012
- 2012-11-14 CN CN 201220598035 patent/CN202930124U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103077777A (en) * | 2012-11-14 | 2013-05-01 | 湖北龙腾红旗电缆(集团)有限公司 | Rat-proof and termite-proof coaxial cable for grounding ultra-high voltage transmission line |
| CN104464903A (en) * | 2014-12-12 | 2015-03-25 | 宿州永通电缆有限公司 | Cable for high-voltage trunk line |
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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: 20130508 Termination date: 20151114 |
|
| EXPY | Termination of patent right or utility model |