CN102270824B - 500kV and more power cable dry GIS (Global Information System) terminal - Google Patents
500kV and more power cable dry GIS (Global Information System) terminal Download PDFInfo
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- CN102270824B CN102270824B CN 201010190781 CN201010190781A CN102270824B CN 102270824 B CN102270824 B CN 102270824B CN 201010190781 CN201010190781 CN 201010190781 CN 201010190781 A CN201010190781 A CN 201010190781A CN 102270824 B CN102270824 B CN 102270824B
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- stress cone
- power cable
- stress
- terminal
- silicon rubber
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- 239000000463 material Substances 0.000 claims abstract description 25
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 21
- 239000004593 Epoxy Substances 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000004944 Liquid Silicone Rubber Substances 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 2
- 239000012212 insulator Substances 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 22
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 230000035882 stress Effects 0.000 description 33
- 229920002943 EPDM rubber Polymers 0.000 description 14
- 238000003825 pressing Methods 0.000 description 6
- 230000032683 aging Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- -1 ethylene, propylene Chemical group 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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- Cable Accessories (AREA)
- Processing Of Terminals (AREA)
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 dry GIS (Global Information System) terminal. The terminal comprises an epoxy sleeve (1), a spring compression mechanism (2) with a spring (2-1) and a stress cone (3) and further comprises outlet hardware (4), a shielding cover (5) and a tail pipe (6). The stress cone (3) is arranged in the epoxy sleeve (1). The spring compression mechanism (2) 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 steady and reliable performance, high yield and low integrated cost because the liquid silicon rubber material of the stress cone is pure; simple manufacture process, easiness manufacture and low manufacture cost; more excellent process mouldability and low required forming pressure because the liquid silicon rubber has lower viscosity and better liquidity before being vulcanized;; and good product quality.
Description
Technical Field
The invention relates to a cable accessory in the field of power cable transmission systems, in particular to a dry GIS terminal of a power cable of 500kV or more than 500 kV.
Background
At present, in a power cable transmission system with voltage levels of 500kV and above 500kV, most cables are crosslinked polyethylene insulated power cables, and a dry-type GIS terminal is used for electrically connecting the crosslinked polyethylene insulated power cables with a GIS combined electrical appliance to realize transmission of electric energy. With the construction of large hydropower stations, pumped storage power stations and extra-high voltage power grids, the usage amount of dry-type GIS terminals is increasing, the dry-type GIS terminals are important connecting pieces in power cable connection systems of 500kV and above 500kV, and the reliability of the dry-type GIS terminals directly influences the reliability of a power transmission system.
In a dry GIS terminal of a power cable of 500kV or more than 500kV, a stress cone of the dry GIS terminal is generally used as an integral prefabricated insulation structure type at present, the dry GIS terminal with the structure comprises an epoxy sleeve, a spring pressing mechanism with a spring, the stress cone, an outgoing line hardware fitting, a shielding cover and a tail pipe, the stress cone is arranged in the epoxy sleeve, the spring pressing mechanism is arranged below the stress cone, and the stress cone is made of ethylene propylene diene monomer rubber materials. The spring pressing device tightly pushes the integral prefabricated stress cone to enable the stress cone to be tightly close to the conical wall of the epoxy sleeve, and insulating agents such as insulating oil or insulating gas do not need to be added into the dry GIS terminal. The stress cone mainly plays a role in homogenizing an electric field and enhancing insulation in the GIS terminal when the insulation shielding of the cable is cut off, and simultaneously provides necessary pressing force for the surface of the cable so as to improve the overall insulation level of the terminal, and is a key component of the dry-type GIS terminal. Because the stress cone is made of ethylene propylene diene monomer rubber, the current dry GIS terminal of the power cable of 500kV and above 500kV has the following defects:
(1) the quality of the material for manufacturing the stress cone is difficult to control, the ethylene propylene diene monomer rubber of the stress cone is mainly terpolymer of ethylene, propylene and non-conjugated diene, a plurality of additives are added in the mixing process, the formula is complex, and the quality of the material is difficult to control; the material has high viscosity and poor forming manufacturability, and the yield of the stress cone is only about 60 percent.
(2) The manufacturing process is complex, the pressure of the forming equipment required for processing the stress cone is large, the volume is large, and the manufacturing cost of the product is high. When the ethylene propylene diene monomer material is processed into the stress cone, the used rubber injection machine is structurally shown in figure 3, during manufacturing, the ethylene propylene diene monomer material is placed in a charging barrel 21 and injected into a mold 23 through an injection mechanism 22, the mold 23 is composed of an upper mold 23-1 and a lower mold 23-2 which are matched with each other, and the heated material is vulcanized and formed into the stress cone in a mold cavity of the mold. Because the viscosity of the plasticized ethylene propylene diene monomer rubber is very high and the flowability is poor, dozens of mega pressure is needed for injecting the ethylene propylene diene monomer rubber into a die cavity, the die cavity and equipment need to bear very high pressure in the injection process, and the size of a forming die is very large, so that a large-tonnage special large rubber injection machine and a large-scale die are needed for rubber injection forming, and the used materials need to be injected once, so that the stress cone of a dry GIS terminal of a power cable of 500kV or above 500kV can be produced, the tonnage of the required rubber injection machine reaches above 1600 tons, the requirement can be met only when the rubber injection is above 80 liters once, the equipment is large in size and high in equipment cost, and the whole manufacturing cost is extremely high due to the increase of the equipment cost.
(3) The ethylene propylene diene monomer rubber has high hardness, Shore A60-70 and poor adhesion with the surface of a cable, so that the installation difficulty of a product and the increase of the failure rate of the product are caused, the mechanical performance (aging condition: 135 +/-3 ℃ and 7d) of an air box of the ethylene propylene diene monomer rubber after aging is less than or equal to 15-25% of compression permanent deformation, less than or equal to 20-30% of tensile strength change rate and less than or equal to 20-30% of elongation change rate, the aging resistance and high temperature resistance of the material are poor, the product is required to operate under the environment condition of less than or equal to 100 ℃, the use is limited, and the application range is narrow.
Although the existing dry GIS terminal for the power cable of 500kV or more than 500kV has the defects, the technical problem can not be solved for a long time.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the dry GIS terminal of the power cable of 500kV or more than 500kV, which has stable and reliable performance, high yield, simple manufacturing process, easy manufacturing, low cost and good quality.
The technical scheme for realizing the aim is as follows: a dry-type GIS terminal of a power cable of 500kV or more than 500kV comprises an epoxy sleeve, a spring pressing mechanism with a spring, a stress cone, an outgoing line hardware fitting, a shielding cover and a tail pipe, wherein the stress cone is arranged in the epoxy sleeve, the spring pressing mechanism is arranged below the stress cone, and the stress cone is made of liquid silicon rubber.
Furthermore, the stress cone consists of a conductor and an insulator.
After the technical scheme is adopted, the dry GIS terminal of the power cable of 500kV or above has many advantages because the manufacturing material of the stress cone of the key part is improved from ethylene propylene diene monomer rubber to liquid silicon rubber:
(1) stable and reliable performance, high rate of finished products and low comprehensive cost. The quality of the material for manufacturing the stress cone is easy to control, the liquid silicon rubber material of the stress cone is simple, independent mixing is not needed, the formula is simple, and the quality of the material is easy to control; the material has low viscosity and good forming manufacturability, the yield of the stress cone can reach about 90 percent, the product of the invention has more stable and reliable performance, the yield is high, the time and the energy are saved, and the comprehensive cost is reduced by more than 40 percent.
(2) The manufacturing process is simple, the manufacturing is easy, and the manufacturing cost is low. The liquid silicone rubber is organic silicone rubber which is relative to mixed semi-solid silicone rubber and common room temperature vulcanized single-component silicone rubber, the liquid silicone rubber has lower viscosity and better fluidity before vulcanization, the viscosity is only 1/10 of ethylene propylene diene monomer, and the process formability is more excellent, so the manufacturing process is simple, the manufacturing is easy, the required forming pressure is small, special large rubber injection machine and large mould with large pressure are not needed for injection forming, the injection forming can be completed only by using common injection equipment and moulds, if the liquid silicone rubber two-component injection machine is adopted, the required pressure intensity of the injection machine is only several mega, the pressure intensity is 1/10 of the ethylene propylene diene monomer injection machine, the injection machine can continuously inject, the pressure intensity can reach 400L in a single time, and the injection quantity can meet the requirement of the stress cone production of a dry GIS terminal of a power cable with 500kV or more than 500kV, the equipment volume is small, the equipment cost is greatly reduced, the manufacturing equipment is easy to obtain, and the manufacturing is easy, so the manufacturing cost of the invention is low.
(3) The product quality is good. The liquid silicone rubber has lower hardness, Shore A35-45, good adhesion with the surface of a cable, easy product installation and low product failure rate, and the mechanical properties (aging conditions: 135 +/-3 ℃ and 7d) of the liquid silicone rubber after an air box is aged, the compression permanent deformation is less than or equal to 15 percent, the tensile strength change rate is less than or equal to 10 percent, the elongation change rate is less than or equal to 10 percent, the material has good aging resistance and high temperature resistance, the product can run for a long time under the environment condition of 100-150 ℃, the product quality is good, and the application range is wide.
The invention solves the complex technical problem of adopting the ethylene propylene diene monomer in the prior art by a simple and ingenious technical scheme, and solves the technical problem which is difficult to solve for a long time.
Drawings
FIG. 1 is a schematic structural view of a cable with member 20 according to the present invention;
FIG. 2 is a schematic structural view of a glue injection machine when a stress cone of a part 3 of the invention is made of liquid silicone rubber;
fig. 3 is a schematic structural view of a rubber injection machine when the stress cone of the existing part 3 is made of ethylene propylene diene monomer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Examples
As shown in fig. 1, the dry-type GIS terminal for power cables of 500kV and above 500kV comprises an epoxy sleeve 1, a spring hold-down mechanism 2 with a spring 2-1, a stress cone 3, an outgoing line hardware fitting 4, a shielding case 5 and a tail pipe 6, wherein the stress cone 3 is arranged in the epoxy sleeve 1, the spring hold-down mechanism 2 is arranged below the stress cone 3, and the stress cone 3 is made of liquid silicon rubber.
As shown in figure 2, when the stress cone 3 is manufactured, a liquid silicon rubber two-component glue injection machine is adopted, the required tonnage of the glue injection machine is 100 tons, the glue injection machine can continuously inject glue, the single time can reach more than 300 liters, materials of a liquid silicon rubber material with two components of A component and B component are respectively placed in two rubber cylinders 24 of the injection machine in the manufacturing process, the materials are injected into a material pipe 27 through an injection pump 26 on an injection frame 25, the materials are mixed by a mixer 28 and then injected into a die cavity in a die 29, the die 29 is locked by a die locking mechanism 30, and finally the die 29 is heated and vulcanized to form the integral prefabricated insulating part 1.
The present invention is not limited to the above embodiments, and all technical solutions formed by using equivalents or equivalent substitutions belong to the scope of the claims of the present invention.
Claims (1)
1. The utility model provides a power cable dry-type GIS terminal more than 500kV and 500kV, includes epoxy sleeve pipe (1), spring hold-down mechanism (2) and stress awl (3) that have spring (2-1), still including gold utensil (4), shield cover (5) and tail pipe (6) of being qualified for the next round of competitions, stress awl (3) are adorned in epoxy sleeve pipe (1), are provided with spring hold-down mechanism (2) below stress awl (3), its characterized in that: the stress cone (3) is made of liquid silicon rubber, and the stress cone (3) consists of a conductor (3-1) and an insulator (3-2); wherein,
the stress cone (3) is made by a continuous injection liquid silicon rubber two-component glue injection machine with the tonnage of 100 tons, and the single injection of the glue injection machine reaches more than 300 liters; liquid silicone rubber materials are respectively placed in two rubber cylinders (24) of an injection machine, the materials are injected into a material pipe (27) through an injection pump (26) on an injection frame (25), the materials are mixed by a mixer (28) and then injected into a mold cavity in a mold (29), and the mold (29) is heated and vulcanized to form the stress cone (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010190781 CN102270824B (en) | 2010-06-03 | 2010-06-03 | 500kV and more power cable dry GIS (Global Information System) terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010190781 CN102270824B (en) | 2010-06-03 | 2010-06-03 | 500kV and more power cable dry GIS (Global Information System) terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102270824A CN102270824A (en) | 2011-12-07 |
| CN102270824B true CN102270824B (en) | 2013-06-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010190781 Active CN102270824B (en) | 2010-06-03 | 2010-06-03 | 500kV and more power cable dry GIS (Global Information System) terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102270824B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630786A (en) * | 2013-12-06 | 2014-03-12 | 江苏希波电气科技有限公司 | Dry terminal system of type test for ultrahigh-voltage cables of 500kV and below |
| 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 |
| CN107359585A (en) * | 2017-08-04 | 2017-11-17 | 江苏中天科技电缆附件有限公司 | A kind of new no epoxy bushing GIS terminal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201690192U (en) * | 2010-06-03 | 2010-12-29 | 江苏安靠超高压电缆附件有限公司 | Dry type GIS terminal for power cable of 500 kV or more |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4746656B2 (en) * | 2008-09-11 | 2011-08-10 | 関西電力株式会社 | 3-core lump-type junction box, withstand voltage test method for test cable, and 3-core lump-type junction box assembly method |
-
2010
- 2010-06-03 CN CN 201010190781 patent/CN102270824B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201690192U (en) * | 2010-06-03 | 2010-12-29 | 江苏安靠超高压电缆附件有限公司 | Dry type GIS terminal for power cable of 500 kV or more |
Non-Patent Citations (5)
| Title |
|---|
| 《500kV交联聚乙烯绝缘电缆在抽水蓄能电站的应用》;凌育华;《大众用电》;20090430(第2009年第4期);第22-23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2010-68664A 2010.03.25 |
| 凌育华.《500kV交联聚乙烯绝缘电缆在抽水蓄能电站的应用》.《大众用电》.2009,(第2009年第4期),第22-23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. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102270824A (en) | 2011-12-07 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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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| COR | Change of bibliographic data |
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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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |