CN102270826B - 500kV and more power cable outdoor terminal - Google Patents
500kV and more power cable outdoor terminal Download PDFInfo
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- CN102270826B CN102270826B CN 201010190801 CN201010190801A CN102270826B CN 102270826 B CN102270826 B CN 102270826B CN 201010190801 CN201010190801 CN 201010190801 CN 201010190801 A CN201010190801 A CN 201010190801A CN 102270826 B CN102270826 B CN 102270826B
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Abstract
The invention relates to a cable accessory in the field of power cable transmission systems, in particular to a 500kV and more power cable outdoor terminal. The terminal comprises a sleeve (1), an insulating agent (2), a stress cone (3), an epoxy sleeve (4) and a spring compression mechanism (5) and further comprises outlet hardware (6), an upper cover board (7), a lower bottom plate (8) and a tail pipe (9). The stress cone (3) is arranged in the sleeve (1). The epoxy sleeve (4) is sleeved outside the stress cone (3). The spring compression mechanism (5) is arranged under the stress cone (3). The stress cone (3) is made of liquid silicon rubber. The terminal disclosed by the invention has the advantages of has steady and reliable performance, high yield, low integrated cost; simple manufacture process, easiness manufacture and low manufacture cost; and more excellent process mouldability and low required forming pressure because before the liquid silicon rubber has lower viscosity and better liquidity being vulcanized; and good product quality.
Description
Technical field
The present invention relates to the electric cable accessories in a kind of power cable transmission system field, particularly the above power cable outdoor terminal of a kind of 500kV and 500kV.
Background technology
At present, in the power cable transmission system of 500kV and 500kV above, cable mostly is power cable with cross-linked polyethylene insulation, and outdoor terminal is used for being connected between power cable with cross-linked polyethylene insulation and overhead wire, in order to realize the transmission of electric energy.Construction along with large hydropower station, hydroenergy storage station, extra-high voltage grid, the use amount of outdoor terminal is increasing, in 500kV and the power cable connected system more than 500kV, outdoor terminal is important connector, and the reliability of outdoor terminal directly has influence on the reliability of transmission system.
In 500kV and the above power cable outdoor terminal of 500kV, the stress cone of the outdoor terminal that generally uses at present is the structural shape of integral prefabricated insulation, the outdoor terminal of this structure, it comprises sleeve pipe, insulating compound, stress cone, epoxy cover and spring compression mechanism, also include outlet gold utensil, upper cover plate, lower shoe and tail pipe, stress cone is contained in sleeve pipe, and stress cone is set with the epoxy cover outward, be provided with spring compression mechanism below stress cone, stress cone is made by ethylene propylene diene monomer (EPDM) material.The stress cone Main Function is when insulation shield is cut off, play out of doors the effect of uniform electric field and reinforced insulation in terminal, also provide essential thrust to the surface of cable simultaneously, to improve terminal integral insulation level, stress cone is the critical component of outdoor terminal.Because stress cone is made by ethylene propylene diene monomer (EPDM) material, therefore present 500kV and the above power cable outdoor terminal of 500kV exists following defective:
(1) quality of materials of making stress cone is difficult to control, and the material ethylene propylene diene rubber of stress cone is mainly the terpolymer of ethene, propylene and non-conjugated diene hydrocarbon, has multiple additives to add in the process of mixing, and the formula complicated difficult is to control quality of materials; Viscosity of material is high, and moulded manufacturability is poor, and the rate of finished products of stress cone only has 60% left and right.
(2) complex manufacturing technology, the former pressure that the machining stress cone needs is large, bulky, and the production cost is high.When ethylene propylene diene monomer (EPDM) material is processed into stress cone, it is shown in Figure 3 that the equipment that uses is annotated rubber machine structure, during making, the material ethylene propylene diene rubber is placed in barrel 21, be expelled in mould 23 by injection mechanism 22, mould 23 is comprised of mold 23-1 and the bed die 23-2 of mutual coupling, and after heating, material sulfidization molding in mold cavity is stress cone.because the viscosity of ethylene propylene diene rubber after plasticizing is very high, and poor fluidity, be injected into die cavity, need tens pressure, in injection process, die cavity and equipment need to bear very high pressure, because the mould volume is very large, need the special special use of large-tonnage large-scale notes rubber machine and large mold just can annotate the rubber moulding, and material used wants a shot to complete, therefore produce the stress cone of 500kV and the above power cable outdoor terminal of 500kV, the notes rubber machine tonnage that needs reaches more than 1600 tons, the single injecting glue reaches more than 80 liters and just can meet the demands, such equipment volume is large, equipment cost is high, and increasing of equipment cost causes whole cost of manufacture high.
(3) because ethylene propylene diene rubber has higher hardness, Shao Shi A60～70, poor with the stickiness of cable surface, cause the installation difficulty of product and the increase of hazard rate, the aging rear mechanical performance of the watertight aircase of ethylene propylene diene rubber (aging condition: 135 ℃ ± 3 ℃, 7d), compression set≤15～25%, tensile strength rate of change≤20～30%, the rate of change of percentage elongation≤20～30%, material ageing resistance, heat-resisting quantity relatively poor, product will move under≤100 ℃ of environmental conditions, use is restricted, narrow application range.
Although the above power cable outdoor terminal of existing 500kV and 500kV exists defects, people can't solve this technical barrier always for a long time.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of stable and reliable for performance, rate of finished products is high, manufacture craft is simple, making is easy, cost is low, the measured 500kV of matter and the above power cable outdoor terminal of 500kV.
Realize that the above-mentioned purpose technical scheme is: the above power cable outdoor terminal of a kind of 500kV and 500kV, include sleeve pipe, insulating compound, stress cone, epoxy cover and spring compression mechanism, also include outlet gold utensil, upper cover plate, lower shoe and tail pipe, stress cone is contained in sleeve pipe, stress cone is set with the epoxy cover outward, be provided with spring compression mechanism below stress cone, described stress cone is made by liquid silastic.
Further, described stress cone is comprised of electric conductor and insulator.
Further, described insulating compound is insulating oil or insulating gas.
After adopting technique scheme, therefore the present invention has a lot of benefits because the making material with the critical component stress cone is improved to liquid silastic by ethylene propylene diene rubber:
(1) stable and reliable for performance, rate of finished products is high, and integrated cost is low.Make the quality of materials of stress cone and easily control, the material liquid silicon rubber material of stress cone is simple, need not mix separately, and formula is simple, easily controls quality of materials; Viscosity of material is low, and moulded manufacturability is good, and the rate of finished products of stress cone can reach 90% left and right, and properties of product of the present invention are more reliable and more stable, and rate of finished products is high, time-saving energy-saving, and integrated cost descends more than 40%.
(2) manufacture craft is simple, makes easily, and cost of manufacture is low.liquid silastic is a class organic silica gel of relative mixed milling type semisolid silicon rubber and common room temperature vulcanization one pack system silica gel, have lower viscosity and mobility preferably before liquid silastic sulfuration, viscosity is only 1/10 of ethylene propylene diene rubber, has more excellent technological forming, therefore manufacture craft is simple, make easily, the briquetting pressure that needs is little, do not need special special use large-scale notes rubber machine and the large mold of large pressure to carry out the injecting glue moulding, only need to just can complete the injecting glue moulding with common glue injection equipment and mould, as adopt the two component glue-injection machines of liquid silastic, the glue-injection machine pressure that needs needs only several million, pressure is 1/10 of ethylene propylene diene rubber notes rubber machine, the injecting glue function is injected continuously, single can reach 400 liters, the injecting glue amount can satisfy the needs of the stress cone production of 500kV and the above power cable outdoor terminal of 500kV, equipment volume is little, equipment cost reduces greatly, making apparatus is easy to get, make easily, therefore cost of manufacture of the present invention is low.
(3) good product quality.Because liquid silastic has lower hardness, Shao Shi A35～45, good with the stickiness of cable surface, product is installed easily, hazard rate is low, the aging rear mechanical performance of the watertight aircase of liquid silastic (aging condition: 135 ℃ ± 3 ℃, 7d), compression set≤15%, tensile strength rate of change≤10%, the rate of change of percentage elongation≤10%, material ageing resistance good, heat-resisting quantity is good, product can long-time running under 100～150 ℃ of environmental conditions, good product quality, applied widely.
The present invention has solved with simple technical scheme cleverly the complicated technical problem that the available technology adopting ethylene propylene diene rubber exists, and has solved for a long time people's insoluble this technical barrier always.
Description of drawings
Fig. 1 is the structural representation of the present invention with part 20 cables;
Glue-injection machine structural representation when Fig. 2 is part 3 stress cones employing liquid silastics making of the present invention;
Notes rubber machine structural representation when Fig. 3 adopts ethylene propylene diene rubber to make for existing part 3 stress cones.
Embodiment
The present invention is further detailed explanation below in conjunction with drawings and Examples.
Embodiment one
As shown in Figure 1, the above power cable outdoor terminal of a kind of 500kV and 500kV, include sleeve pipe 1, insulating compound 2, stress cone 3, epoxy cover 4 and spring compression mechanism 5, also include outlet gold utensil 6, upper cover plate 7, lower shoe 8 and tail pipe 9, stress cone 3 is comprised of electric conductor 3-1 and insulator 3-2, and described insulating compound 2 is insulating oil.Stress cone 3 is contained in sleeve pipe 1, the outer suit epoxy cover 4 of stress cone 3, be filled with insulating oil in sleeve pipe 1, be provided with the spring compression mechanism 5 that is connected with tail pipe 9 below stress cone 3, spring compression mechanism 5 includes spring 5-1 and spring base 5-2, spring 5-1 is arranged between stress cone 8 and spring base 5-2, and described stress cone 3 is made by liquid silastic.
Embodiment two
As shown in Figure 1, basic identical with embodiment one, different is that described insulating compound 2 is insulating gas, and sleeve pipe 1 is interior insulation gas filled.
As shown in Figure 2; when stress cone 3 of the present invention is made; adopt the two component glue-injection machines of liquid silastic; 100 tons of the glue-injection machine tonnages that needs; the injecting glue function is injected continuously; single can reach more than 300 liters; material with the liquid silicon rubber material of the two components of A component and B component in manufacturing process is placed on respectively in two packing elements 24 of injector; to expect to annotate in material pipe 27 by the syringe pump 26 on injection holder 25; after material mixes through blender 28; be expelled in the die cavity in mould 29, mould 29 has clamping mechanism 30 lockings, and last mould 29 bakings are made stress cone 1.
The invention is not restricted to above-described embodiment, the technical scheme that all employings are equal to replacement or equivalence replacement formation all belongs to the scope of protection of present invention.
Claims (1)
1. a 500kV and the above power cable outdoor terminal of 500kV, include sleeve pipe (1), insulating compound (2), stress cone (3), epoxy cover (4) and spring compression mechanism (5), also include outlet gold utensil (6), upper cover plate (7), lower shoe (8) and tail pipe (9), stress cone (3) is contained in sleeve pipe (1), the outer suit of stress cone (3) epoxy cover (4), be provided with spring compression mechanism (5) below stress cone (3), it is characterized in that: described stress cone (3) is made by liquid silastic, described stress cone (3) is comprised of electric conductor (3-1) and insulator (3-2), described insulating compound (2) is insulating oil or insulating gas, wherein,
Described stress cone (3) adopts the two component glue-injection machines of the liquid silastic of 100 tons of tonnages to make, and described glue-injection machine is injected continuously, and single reaches more than 300 liters; Liquid silicon rubber material is placed on respectively in two packing elements of injector (24), to expect to annotate in material pipe (27) by the syringe pump (26) on injection holder (25), after material mixes through blender (28), be expelled in the die cavity in mould (29), last mould (29) baking is made stress cone (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010190801 CN102270826B (en) | 2010-06-03 | 2010-06-03 | 500kV and more power cable outdoor terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010190801 CN102270826B (en) | 2010-06-03 | 2010-06-03 | 500kV and more power cable outdoor terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102270826A CN102270826A (en) | 2011-12-07 |
| CN102270826B true CN102270826B (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010190801 Active CN102270826B (en) | 2010-06-03 | 2010-06-03 | 500kV and more power cable outdoor terminal |
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| Country | Link |
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| CN (1) | CN102270826B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451314B (en) * | 2016-12-02 | 2018-07-27 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Self-tightening type controls the insulator cap of cable core end |
| CN109217224A (en) * | 2018-11-13 | 2019-01-15 | 特变电工昭和（山东）电缆附件有限公司 | A kind of outer terminal of 500kV and 500kV or more AC and DC power cable user |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2845261Y (en) * | 2005-10-11 | 2006-12-06 | 上海三原电缆附件有限公司 | Outdoor terminal of 220 KV crosslinked cable |
| CN201345528Y (en) * | 2008-12-12 | 2009-11-11 | 浙江永锦电力器材有限公司 | GIS dry type cable terminal |
| CN201690195U (en) * | 2010-06-03 | 2010-12-29 | 江苏安靠超高压电缆附件有限公司 | 500 kV and more than 500 kV power cable outdoor terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4762970B2 (en) * | 2007-12-27 | 2011-08-31 | 株式会社ビスキャス | Power cable aerial termination connection and manufacturing method thereof |
-
2010
- 2010-06-03 CN CN 201010190801 patent/CN102270826B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2845261Y (en) * | 2005-10-11 | 2006-12-06 | 上海三原电缆附件有限公司 | Outdoor terminal of 220 KV crosslinked cable |
| CN201345528Y (en) * | 2008-12-12 | 2009-11-11 | 浙江永锦电力器材有限公司 | GIS dry type cable terminal |
| CN201690195U (en) * | 2010-06-03 | 2010-12-29 | 江苏安靠超高压电缆附件有限公司 | 500 kV and more than 500 kV power cable outdoor terminal |
Non-Patent Citations (5)
| Title |
|---|
| 《500kV交联聚乙烯电缆系统》;Rolf Maier等;《国际电力》;19991231(第1999年第4期);第32-35页 * |
| 《国外特高压交流输电技术工程简介》;蓝增珏;《湖北电力》;20050630;第29卷(第3期);第1-3页 * |
| JP特开2009-159743A 2009.07.16 |
| Rolf Maier等.《500kV交联聚乙烯电缆系统》.《国际电力》.1999,(第1999年第4期),第32-35页. |
| 蓝增珏.《国外特高压交流输电技术工程简介》.《湖北电力》.2005,第29卷(第3期),第1-3页. |
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| Publication number | Publication date |
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| CN102270826A (en) | 2011-12-07 |
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| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 213333 Tianmu Lake Industrial Park, Liyang Economic Development Zone, Jiangsu, China Applicant after: Jiangsu Ankura Smart Transmission Engineering Technology Co., Ltd. Address before: 213333 Tianmu Lake Industrial Park, Liyang Economic Development Zone, Jiangsu, China Applicant before: Jiangsu Ankura EHV Cable Accessories Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: JIANGSU ANKURA EHV CABLE ACCESSORIES CO., LTD. TO: JIANGSU ANKURA SMART TRANSMISSION ENGINEERING TECHNOLOGY CO., LTD. |
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