CN205609239U - High -voltage power cable - Google Patents
High -voltage power cable Download PDFInfo
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- CN205609239U CN205609239U CN201620260118.2U CN201620260118U CN205609239U CN 205609239 U CN205609239 U CN 205609239U CN 201620260118 U CN201620260118 U CN 201620260118U CN 205609239 U CN205609239 U CN 205609239U
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Abstract
The utility model relates to a high -voltage power cable, including cable core, interior crosslinked polyethylene insulating layer, by crosslinked polyethylene and graphite alkene heat conduction powder composition's insulating heat transfer layer, outer crosslinked polyethylene insulating layer, metal protection cover, outer protection jacket. The three layer construction that high -voltage power cable's insulation system comprises interior crosslinked polyethylene insulating layer, insulating heat transfer layer and outer crosslinked polyethylene insulating layer, insulating heat transfer layer in the middle of wherein being located has promoted 1.8~2.6 times with whole insulation system's heat conductivility, combine between insulating heat transfer layer and interior crosslinked polyethylene insulating layer or the outer crosslinked polyethylene insulating layer firmly to avoid appearing layering and insulating heat transfer layer and punctured, the thermal diffusivity of cable is further improved on metal protection cover and heat radiation protection layer. High -voltage power cable heat resistance is good, and the radiating effect is good, and the work in 95~120 DEG C high temperature environment is for a long time used.
Description
Technical field
This utility model relates to a kind of high voltage power cable, belongs to field of cable technology.
Background technology
Cable in order to transmit electricity (magnetic) can, information and realize the wire product of electromagnetic energy conversion, it may be defined as: the aggregation being made up of following part；One or more insulated wire cores, and the clad that each of which is likely to be of, total protective layer and outer jacket, cable also can have the additional conductor not having insulation.In order to transmit electricity (magnetic) energy, information and the wire product realizing electromagnetic energy conversion.
Power cable be mainly characterized by comprising: outside conductor squeeze (around) bag insulating barrier, such as aerial insulated cable, or several core stranded (the corresponding phase line of power system, zero line and ground wire), such as the two above aerial insulated cables of core, or it is further added by restrictive coating, such as plastics/rubber set electric wire.Main Technology has drawing, stranded, insulating exruded (wrapped), stranding, armouring and sheath extrusion etc., and the different process step combinations of various products have certain difference.
Power cable be used primarily in send out, join, defeated, become, forceful electric power electric energy transmission in supply line, the electric current passed through big (tens peaces are to several kilo-amperes), voltage high (220V to 35kV and more than).
The more existing frequent surface of high voltage power cables is higher than the high temperature hostile regional work of 25 DEG C for a long time in ambient temperature, and high voltage power cable is owing to reach high voltage bearing demand, therefore the insulated part of cable and the heat conductivity of outer protection part are limited, do not reach the purpose of quick heat radiating, core is at 90 DEG C during long-term work, crosslinked cable load raises, core temperature raises, cable heated expands, at turning of cable, long-term large load operation cable wriggling strength is the biggest, cable insulation part and outer protection portion be easy aging layering between dividing, time serious, cable breakdown even can occur.
Utility model content
The deficiency that this utility model exists for prior art, it is provided that a kind of high voltage power cable, concrete technical scheme is as follows:
A kind of high voltage power cable; including cable core, interior crosslinked polyetylene insulated layer, the thermal insulation layer being made up of crosslinked polyethylene and Graphene conduction powder, external crosslinking polyethylene layer, metal protection protector, outer jointing jacket, the wherein rounded structure in the cross section of cable core；Described interior crosslinked polyetylene insulated layer is coated on the surface of cable core, and the ratio between thickness and the diameter of section of cable core of interior crosslinked polyetylene insulated layer is 1:3.88；Described thermal insulation layer is coated on the surface of interior crosslinked polyetylene insulated layer, and the thickness of thermal insulation layer is 1:2.65 with the ratio of the thickness dimensions of interior crosslinked polyetylene insulated layer；Described external crosslinking polyethylene layer is coated on the surface of thermal insulation layer, and the thickness of external crosslinking polyethylene layer is equal to the thickness of interior crosslinked polyetylene insulated layer；Described metal protection protector is coated on the surface of external crosslinking polyethylene layer, and described outer jointing jacket is coated on the surface of metal protection protector, and the ratio between thickness and the thickness of external crosslinking polyethylene layer of outer jointing jacket is 1.25:1.
Improvement as technique scheme, described include being additionally provided with between cable core and interior crosslinked polyetylene insulated layer semiconductive nylon belt and semiconductive conductor shield, semiconductive nylon belt wrapped is formed by semiconductive nylon tape is overlapping on cable core, and semiconductive conductor shield is coated on the surface of semiconductive nylon belt.
As the improvement of technique scheme, the outer surface of described metal protection protector is provided with multiple skewed slot, and skewed slot is divided into raised line at the internal bosses of metal protection protector.
Improvement as technique scheme; described outer jointing jacket is embedded in a circle heat radiation protection layer; ratio between area of section and the area of section of outer jointing jacket of heat radiation protection layer is 1:4, and heat radiation protection layer includes many mutual stranded metallic cables, and the cross section of metallic cable is the figure of eight.
The three-decker that the insulation system of high voltage power cable described in the utility model is made up of interior crosslinked polyetylene insulated layer, thermal insulation layer and external crosslinking polyethylene layer, the heat conductivility of whole insulation system is improved 1.8 ~ 2.6 times by the thermal insulation layer being wherein positioned at centre；It is firmly combined with between thermal insulation layer and interior crosslinked polyetylene insulated layer or external crosslinking polyethylene layer, it is to avoid occur that layering and thermal insulation layer are breakdown；Metal protection protector and heat radiation protection layer improve the thermal diffusivity of cable further.High voltage power cable fine heat-resisting performance described in the utility model, excellent in heat dissipation effect, can job applications in the hot environment of 95 ~ 120 DEG C for a long time.
Accompanying drawing explanation
Fig. 1 is high voltage power cable structural representation described in the utility model；
Fig. 2 is metal protection protector structural representation described in the utility model；
Fig. 3 is partial enlarged drawing at A in Fig. 2；
Fig. 4 is metal protection protector structural representation described in the utility model (vertical view state)；
Fig. 5 is metallic cable schematic cross-section described in the utility model.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
As it is shown in figure 1, Fig. 1 is high voltage power cable structural representation described in the utility model.Described high voltage power cable; including cable core 10, interior crosslinked polyetylene insulated layer 40, the thermal insulation layer 50 being made up of crosslinked polyethylene and Graphene conduction powder, external crosslinking polyethylene layer 60, metal protection protector 70, outer jointing jacket 80, the wherein rounded structure in the cross section of cable core 10；Described interior crosslinked polyetylene insulated layer 40 is coated on the surface of cable core 10, for ensureing the insulating properties of whole cable, ratio between thickness and the diameter of section of cable core 10 of interior crosslinked polyetylene insulated layer 40 is 1:3.88, the cable of the most a diameter of 40 millimeters, the area of section of cable core 10 is 400 square millimeters, the diameter of cable core 10 22.6 millimeters, the thickness of interior crosslinked polyetylene insulated layer 40 is 5.8 millimeters, error is ± 0.1 millimeter, interior crosslinked polyetylene insulated layer 40 is made up of cross-linking polyethylene materials, primarily serves insulating effect.
Described thermal insulation layer 50 is coated on the surface of interior crosslinked polyetylene insulated layer 40, is ensureing the heat conductivity of thermal insulation layer 50 and is avoiding it the most breakdown, and thermal insulation layer 50 needs enough thickness；But the enough thickness of thermal insulation layer 50 can cause the combination between thermal insulation layer 50 and interior crosslinked polyetylene insulated layer 40 or external crosslinking polyethylene layer 60 to be deteriorated, cost also can rise simultaneously, therefore, the thickness of thermal insulation layer 50 is 1:2.65 with the ratio of the thickness dimensions of interior crosslinked polyetylene insulated layer 40, in such as, the thickness of crosslinked polyetylene insulated layer 40 is 5.8 millimeters, the thickness of thermal insulation layer 50 is 2.2 millimeters, and error is ± 0.1 millimeter.Described external crosslinking polyethylene layer 60 is coated on the surface of thermal insulation layer 50, the thickness of external crosslinking polyethylene layer 60 is equal to the thickness of interior crosslinked polyetylene insulated layer 40, in such as, the thickness of crosslinked polyetylene insulated layer 40 is 5.8 millimeters, the thickness of external crosslinking polyethylene layer 60 is 5.8 millimeters, error is ± 0.1 millimeter, the material of external crosslinking polyethylene layer 60 is identical with interior crosslinked polyetylene insulated layer 40, all it is made up of cross-linking polyethylene materials, primarily serve insulating effect, therefore crosslinked polyetylene insulated layer 40 in, thermal insulation layer 50 and external crosslinking polyethylene layer 60 constitute one layer of insulation system；Wherein, the position of thermal insulation layer 50 is owing to being to occupy the centre position between external crosslinking polyethylene layer 60 and interior crosslinked polyetylene insulated layer 40, its effect is on the one hand to need to bond external crosslinking polyethylene layer 60 and interior crosslinked polyetylene insulated layer 40, avoid high-voltage breakdown, also need to that there is the excellent capacity of heat transmission passed rapidly by the amount of heat produced in cable core 10, it is to avoid owing to the heat radiation of the blocked up heat conduction of insulation system is bad.
For ensureing that the adhesion between thermal insulation layer 50 and external crosslinking polyethylene layer 60 or interior crosslinked polyetylene insulated layer 40 reaches optimum, avoid follow-up due to high temperature, aging cause layering, the material of main part of thermal insulation layer 50 also selects crosslinked polyethylene, and the Graphene conduction powder adding excellent thermal conductivity improves the thermal diffusivity of thermal insulation layer 50.One specific embodiment of thermal insulation layer 50 manufacture method is as follows:
1), weigh the bisphenol A type epoxy resin of 70Kg, the E44 type epoxy resin of 53Kg, the modified by cardanol amine hardener of 88Kg, the dicyandiamide of 6.5Kg, the silane coupler mix homogeneously of 7.2Kg make epoxy resin glue；Wherein it should be noted that epoxy resin glue need to i.e. join i.e. use, used complete after having configured in 30 minutes, otherwise can be because primary solidification causes scrapping；
2) graphene film of a volume 50Kg, is cut, its surface coats one layer of epoxy resin glue, the consumption of epoxy resin glue is 134Kg, error is at ± 0.5Kg, then toast 5 minutes at 120 DEG C, put into after cooling in pulverizer and make particle diameter and i.e. obtain described Graphene conduction powder less than or equal to the powder body of 0.05 millimeter；
3), weigh the crosslinked polyethylene of 1000Kg and the Graphene conduction powder of 65Kg, after being mixed uniformly, more i.e. make thermal insulation layer 50 by extrusion molding.
Owing to the material of main part of thermal insulation layer 50 is crosslinked polyethylene, and being firmly combined with between external crosslinking polyethylene layer 60 or interior crosslinked polyetylene insulated layer 40, it is to avoid high temperature causes insulation system inside aging, layering occur for a long time；It is the deficiency that the Graphene conduction powder that material of main part is made improves crosslinked polyethylene heat conductivity by graphene film, utilize epoxy resin glue that the powder shaped grapheme material material of powdery (graphene film be ground into) is carried out surface process, improve Graphene conduction powder in the dispersibility within thermal insulation layer 50 and the adhesion between powder shaped grapheme material and crosslinked polyethylene.Under the effect of modified by cardanol amine hardener, epoxy resin glue primary solidification speed is fast, when the effect of dicyandiamide is such that in extrusion molding, epoxy resin glue solidifies further, make Graphene conduction powder crosslinked polyethylene flow, promote it to be uniformly dispersed and between epoxy resin glue and crosslinked polyethylene combine more firm；Silane coupler improves the combination between powder shaped grapheme material and bisphenol A type epoxy resin, E44 type epoxy resin, and E44 type epoxy resin is used for reducing cost.
The heat conductivity of thermal insulation layer 50 be external crosslinking polyethylene layer 60,6 ~ 10 times of interior crosslinked polyetylene insulated layer 40, excellent thermal conductivity so that the heat conductivility of whole insulation system improves 1.8 ~ 2.6 times, improves the thermal diffusivity of cable greatly.
Described metal protection protector 70 is coated on the surface of external crosslinking polyethylene layer 60, and described outer jointing jacket 80 is coated on the surface of metal protection protector 70；In order to effectively protect external crosslinking polyethylene layer 60 and metal protection protector 70; ratio between thickness and the thickness of external crosslinking polyethylene layer 60 of outer jointing jacket 80 is 1.25:1; the such as thickness of external crosslinking polyethylene layer 60 is 5.8 millimeters; the thickness of outer jointing jacket 80 7.3 millimeters, error is ± 0.1 millimeter.
Uniform in order to further assure that cable core 10 surface field of cable, prevent electric field distortion, it is to avoid in insulating barrier, table produces shelf depreciation；Described include being additionally provided with between cable core 10 and interior crosslinked polyetylene insulated layer 40 semiconductive nylon belt 20 and semiconductive conductor shield 30, semiconductive nylon belt 20 wrapped is formed by semiconductive nylon tape is overlapping on cable core 10, and semiconductive conductor shield 30 is coated on the surface of semiconductive nylon belt 20.The material of semiconductive conductor shield 30 adds carbon black composition with polyethylene for base material.During making cable, the Duplication of the semiconductive nylon tape in semiconductive nylon belt 20 should many 20%, and require the wrapped flat smooth of semiconductive nylon tape, bottom pour ladle defect can not be there is, to reach to further assure that the uniform of cable core 10 surface field, prevent electric field distortion, it is to avoid produce shelf depreciation, thus improve the resistance to voltage levels of cable insulation.Meanwhile, in process of production, remain the cleaning on semiconductive conductor shield 30 surface with intact, and free from dust pollute and scratch defect.
For playing secure bond effect and the heat-transfer effect of metal protection protector 70 further; as shown in Fig. 2 ~ 3; Fig. 2 is metal protection protector structural representation described in the utility model, and Fig. 3 is partial enlarged drawing at A in Fig. 2, and Fig. 4 is metal protection protector structural representation described in the utility model (vertical view state).The outer surface of described metal protection protector 70 is provided with multiple skewed slot 71, and skewed slot 71 is divided into raised line 72 at the internal bosses of metal protection protector 70.Wherein, metal protection protector 70 is preferably copper material, such as Cu alloy material, utilizes stamping technology processing skewed slot 71 and raised line 72, and processing method is simply, easily operate；Skewed slot 71 and raised line 72 improve the combination effect between metal protection protector 70 and outer jointing jacket 80 and heat-transfer effect further.
For improving the thermal diffusivity of cable further; described outer jointing jacket 80 is embedded in a circle heat radiation protection layer 90; ratio between area of section and the area of section of outer jointing jacket 80 of heat radiation protection layer 90 is 1:4; heat radiation protection layer 90 includes many mutual stranded metallic cables 91, and the cross section of metallic cable 91 is the figure of eight (as shown in Figure 5).Be there is by the heat radiation protection layer 90 that metallic cable 91 is the most stranded the effect of armouring protection, and combine more firm between outer jointing jacket 80；And owing to the cross sectional shape of metallic cable 91 is the figure of eight; in stranding process; metallic cable 91 and the radial direction of metal protection protector 70 or and between for being in non-perpendicular state; conduct heat away direction major part within cable is radially transmission; hence in so that heat can outwards be dissipated by metallic cable 91 faster; when cable dissipates distortion or bending, this structure of heat radiation protection layer 90 is more conducive to distortion or the bending of cable.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.
Claims (4)
1. a high voltage power cable; it is characterized in that: include cable core (10), interior crosslinked polyetylene insulated layer (40), the thermal insulation layer (50) being made up of crosslinked polyethylene and Graphene conduction powder, external crosslinking polyethylene layer (60), metal protection protector (70), outer jointing jacket (80), the wherein rounded structure in cross section of cable core (10)；Described interior crosslinked polyetylene insulated layer (40) is coated on the surface of cable core (10), and the ratio between thickness and the diameter of section of cable core (10) of interior crosslinked polyetylene insulated layer (40) is 1:3.88；Described thermal insulation layer (50) is coated on the surface of interior crosslinked polyetylene insulated layer (40), and the thickness of thermal insulation layer (50) is 1:2.65 with the ratio of the thickness dimensions of interior crosslinked polyetylene insulated layer (40)；Described external crosslinking polyethylene layer (60) is coated on the surface of thermal insulation layer (50), and the thickness of external crosslinking polyethylene layer (60) is equal to the thickness of interior crosslinked polyetylene insulated layer (40)；Described metal protection protector (70) is coated on the surface of external crosslinking polyethylene layer (60); described outer jointing jacket (80) is coated on the surface of metal protection protector (70), and the ratio between thickness and the thickness of external crosslinking polyethylene layer (60) of outer jointing jacket (80) is 1.25:1.
A kind of high voltage power cable the most according to claim 1, it is characterized in that: described in include between cable core (10) and interior crosslinked polyetylene insulated layer (40), being additionally provided with semiconductive nylon belt (20) and semiconductive conductor shield (30), semiconductive nylon belt (20) the most overlapping wrapped is formed cable core (10) is upper by semiconductive nylon tape, and semiconductive conductor shield (30) is coated on the surface of semiconductive nylon belt (20).
A kind of high voltage power cable the most according to claim 1, it is characterised in that: the outer surface of described metal protection protector (70) is provided with multiple skewed slot (71), and skewed slot (71) is divided into raised line (72) at the internal bosses of metal protection protector (70).
A kind of high voltage power cable the most according to claim 1; it is characterized in that: described outer jointing jacket (80) is embedded in circle heat radiation protection layer (90); ratio between area of section and the area of section of outer jointing jacket (80) of heat radiation protection layer (90) is 1:4; heat radiation protection layer (90) includes many mutual stranded metallic cables (91), and the cross sectional shape of metallic cable (91) is the figure of eight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620260118.2U CN205609239U (en) | 2016-03-31 | 2016-03-31 | High -voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620260118.2U CN205609239U (en) | 2016-03-31 | 2016-03-31 | High -voltage power cable |
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| Publication Number | Publication Date |
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| CN205609239U true CN205609239U (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620260118.2U Expired - Fee Related CN205609239U (en) | 2016-03-31 | 2016-03-31 | High -voltage power cable |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679424A (en) * | 2016-03-31 | 2016-06-15 | 宁国市明福线缆有限公司 | High-voltage power cable |
| WO2019092592A3 (en) * | 2017-11-07 | 2019-11-07 | Jaber Innovation S.R.L. | Method for contrasting injection of electrical charge in insulating layer of hvdc electrical apparatus, hvdc transmission cable and accessory for hvdc cable |
| CN116092731A (en) * | 2022-09-09 | 2023-05-09 | 国网山东省电力公司电力科学研究院 | Wear-resistant coated wire and preparation method and application thereof |
-
2016
- 2016-03-31 CN CN201620260118.2U patent/CN205609239U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105679424A (en) * | 2016-03-31 | 2016-06-15 | 宁国市明福线缆有限公司 | High-voltage power cable |
| CN105679424B (en) * | 2016-03-31 | 2017-04-26 | 安徽明福电缆有限公司 | High-voltage power cable |
| WO2019092592A3 (en) * | 2017-11-07 | 2019-11-07 | Jaber Innovation S.R.L. | Method for contrasting injection of electrical charge in insulating layer of hvdc electrical apparatus, hvdc transmission cable and accessory for hvdc cable |
| CN116092731A (en) * | 2022-09-09 | 2023-05-09 | 国网山东省电力公司电力科学研究院 | Wear-resistant coated wire and preparation method and application thereof |
| CN116092731B (en) * | 2022-09-09 | 2024-02-27 | 国网山东省电力公司电力科学研究院 | Wear-resistant coated wire and preparation method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 242300 Xuancheng Road, Ningguo economic and Technological Development Zone, Anhui, Changhong Patentee after: Anhui Mingfu Cable Co. Ltd. Address before: 242300 Xuancheng Road, Ningguo economic and Technological Development Zone, Anhui, Changhong Patentee before: NINGGUO MINGFU CABLE CO., LTD. |
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| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160928 Termination date: 20170331 |
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| CF01 | Termination of patent right due to non-payment of annual fee |