CN204966125U - Thermoplastic is insulating multi -thread to guide cable - Google Patents
Thermoplastic is insulating multi -thread to guide cable Download PDFInfo
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- CN204966125U CN204966125U CN201520671937.1U CN201520671937U CN204966125U CN 204966125 U CN204966125 U CN 204966125U CN 201520671937 U CN201520671937 U CN 201520671937U CN 204966125 U CN204966125 U CN 204966125U
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Abstract
The utility model provides a thermoplastic is insulating multi -thread to guide cable, has cable, termination rack and intermediate head, its characterized in that: conductor in the cable is the annealed copper conductor, and the conductor outsourcing has a solid high density polyethylene insulating layer, the insulating layer has the colour, strands high frequency, audio line according to insulating chromatogram, and the cable core intussuseption is filled with the petroleum jelly, and the cable core wraps block water area, copper strips, PE inner sheath, galvanized steel wire, non -woven fabrics and PE oversheath outward in proper order, and the PE oversheath still is equipped with the one deck graphite coating outward, intermediate head has metal protection shell and oversheath, and the intussuseption of metal protection shell is filled with epoxy. The utility model discloses in mainly being applied to the 220kv power line system, lay in the channel or under water with high voltage power cable is parallel. Having good electrical characteristics, high frequency transfer characteristic and mechanical physical properties, having excellent anti external electromagnetic field again, reliability and the stability of cable in the long -time running has been guaranteed to the damp proof insulation that blocks water and resistant environmental stress fracture characteristic.
Description
Technical field
The present invention relates to field of cables, be specifically related to a kind of thermoplastics and insulate multi-thread to guide cable.
Background technology
Along with developing rapidly of electric power system; each big city load increases increasingly; in high voltage power transmission and transforming system, urban substation or the supply line very near apart from Key Substation; under system short-circuit, produce high longitudinal phase induced voltage with the control cables in high voltage power cable parellel arranged longitudinal difference protection loop, repeatedly cause the problems such as protective device refused action or misoperation and cable insulation puncture.Therefore, the vertical poor the means of relay protection of seeking a kind of excellent performance becomes the key ensureing that electric power system normally runs.
Guide cable longitudinal difference protection is the short-term road protected mode that a kind of device is simple, reliable, maintenance is few, protective value is good, is therefore subject to the attention of power department, and will be applied to more and more widely in power transmission and transformation line system.
In view of the basic industry such as the energy, electric power active demand excellent performance integrate high pressure resistant, the guide cable of longitudinal difference protection and Signal transmissions and annex; and domesticly at present only to develop, produce some voltage withstand class low (a.c3kv), insulation resistance is lower (20 DEG C; >=10M Ω .km), decay is comparatively large and be not suitable for the protection control cables of high-frequency signal transmission, fully can not meet the demand of electric power system.Although the exploitation of external guide cable and annex, production are more a little earlier, dependence on import is then costly.
Summary of the invention
The insulation of a kind of thermoplastics is the invention provides multi-thread to guide cable for solving the problem, there are cable, termination rack and transition joint, it is characterized in that: the conductor in cable is annealed copper conductor, solid high density polyethylene (HDPE) insulating barrier is surrounded by outside conductor, described insulating barrier is with color, by insulation chromatogram by stranded to high frequency, tone frequency channel wire, petroleum jelly is filled with in cable core, cable core is surrounded by waterstop, copper strips, PE inner sheath, zinc-coated wire, nonwoven fabrics and PE oversheath outward successively, and PE oversheath is also provided with one deck equadag coating outward; Described transition joint, with metal protection shell and oversheath, is filled with epoxy resin in metal protection shell.Described cable has 61 pairs of cable cores.
Guide cable must adopt core to twist technology, makes transvercal induction voltage be zero, otherwise cannot ensure the accuracy of longitudinal difference protection.The line of guide cable should be as far as possible little to electric capacity and decay, to meet the communication technology requirement of long range propagation power frequency, audio frequency and high-frequency signal.For preventing electromagnetic interference, guide cable must possess electro-magnetic screen layer, as: copper strips or copper wire and metal armor layers.In cable core, filled stone ointment, is surrounded by waterstop outside cable core, when cable laying in humid area or under water time, ensure not seep water in cable core and in the gap of cable core and sheath, worsen with the insulation property and fade performance that prevent cable.Transition joint adopts metal-back protection, to ensure the mechanical strength of cable, and casting epoxy resin filler sealed damp-proof in metal-back.Cable conductor connects employing cross-cross skip connection technology simultaneously, ensures that cross-talk when whole line signal transmits is minimum.Because resistance, electric capacity, inductance and conductance seriously affect the wave impedance of cable system on audio frequency and carrier frequency, in order to ensure to meet standard regulation, absorbefacient dielectric should not be used.And in order to prevent the loss of any interfacial polarization, cable and all dielectric of annex should be to frequency stabilization, i.e. instantaneous pole voltinism dielectric, and have identical or close dielectric constant.
This structural design, cable is made not only to have good electrical characteristic, frequency transfer characteristic and mechanical and physical performance, have again excellent anti-external electromagnetic field, block water damp proof insulation and resisting environmental stress and cracking characteristic, ensure that the reliability of cable in long-time running and stability.
Accompanying drawing explanation
Fig. 1 is guide cable structural representation;
Fig. 2 is guide cable terminal schematic diagram;
Wherein: 1-strand is right; 2-petroleum jelly; 3-waterstop; 4-copper strips; 5-PE inner sheath; 6-zinc-coated wire; 7-nonwoven fabrics; 8-PE oversheath; The outer metal protection shell of 9-joint; 10-oversheath; 11-epoxy resin.
Embodiment
Thermoplastics insulation is multi-thread to guide cable, has annealed copper conductor, is surrounded by the solid high density polyethylene (HDPE) insulating barrier with color outside conductor, and by insulation chromatogram by stranded to high frequency, tone frequency channel wire, cable conductor adopts cross-cross skip connection technology.Cable has 61 pairs of cable cores, is filled with petroleum jelly in cable core, and cable core is surrounded by waterstop, copper strips, PE inner sheath, zinc-coated wire, nonwoven fabrics and PE oversheath outward successively, and PE oversheath is also provided with one deck equadag coating outward.The present invention is also with transition joint, and transition joint, with metal protection shell and oversheath, is filled with epoxy resin in metal protection shell.
The present invention is mainly used in 220kv power wiring systems; with high voltage power cable parallel lay-up in channels or under water; for in the longitudinal difference protection of line system and power distribution equipment and electrical equipment, signal transmission in instrument, the purposes such as telephone communication and carrier communication.Not only have good electrical characteristic, frequency transfer characteristic and mechanical and physical performance, have again excellent anti-external electromagnetic field, block water damp proof insulation and resisting environmental stress and cracking characteristic, ensure that the reliability of cable in long-time running and stability.
Claims (2)
1. thermoplastics insulation is multi-thread to guide cable, there are cable, termination rack and transition joint, it is characterized in that: the conductor in cable is annealed copper conductor, solid high density polyethylene (HDPE) insulating barrier is surrounded by outside conductor, described insulating barrier, with color, by insulation chromatogram by stranded to high frequency, tone frequency channel wire, is filled with petroleum jelly in cable core, cable core is surrounded by waterstop, copper strips, PE inner sheath, zinc-coated wire, nonwoven fabrics and PE oversheath outward successively, and PE oversheath is also provided with one deck equadag coating outward; Described transition joint, with metal protection shell and oversheath, is filled with epoxy resin in metal protection shell.
2. a kind of thermoplastics insulation as claimed in claim 1 is multi-thread to guide cable, it is characterized in that: have 61 pairs of cable cores.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520671937.1U CN204966125U (en) | 2015-09-02 | 2015-09-02 | Thermoplastic is insulating multi -thread to guide cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520671937.1U CN204966125U (en) | 2015-09-02 | 2015-09-02 | Thermoplastic is insulating multi -thread to guide cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204966125U true CN204966125U (en) | 2016-01-13 |
Family
ID=55061174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520671937.1U Active CN204966125U (en) | 2015-09-02 | 2015-09-02 | Thermoplastic is insulating multi -thread to guide cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204966125U (en) |
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2015
- 2015-09-02 CN CN201520671937.1U patent/CN204966125U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |