JPS5922662Y2 - oil-filled bushing - Google Patents
oil-filled bushingInfo
- Publication number
- JPS5922662Y2 JPS5922662Y2 JP1221579U JP1221579U JPS5922662Y2 JP S5922662 Y2 JPS5922662 Y2 JP S5922662Y2 JP 1221579 U JP1221579 U JP 1221579U JP 1221579 U JP1221579 U JP 1221579U JP S5922662 Y2 JPS5922662 Y2 JP S5922662Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- gas
- insulating
- bushing
- filled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Description
【考案の詳細な説明】
この考案はガス絶縁電気機器に使用される油入ブッシン
グの改良に関するものである。[Detailed Description of the Invention] This invention relates to an improvement in oil-filled bushings used in gas-insulated electrical equipment.
一般にガス封入電気機器内部の絶縁性ガスのガス圧は３
〜４ｋｇ／ｃｍ２の圧力で用いられる。Generally, the gas pressure of insulating gas inside gas-filled electrical equipment is 3
It is used at a pressure of ~4 kg/cm2.
しかし、ガス絶縁電気機器に用いられる油入ブッシング
のブッシング内圧力は、０．５〜１．０ ｋｇ／ｃｍ２
で゛あり、ガス側の圧力に比してかなり低いためバッキ
ングなどによるシール部が経年劣化などによりシール効
果を減じると、ガスがブッシング内に侵入する恐れがあ
る。However, the internal pressure of oil-filled bushings used in gas-insulated electrical equipment is 0.5 to 1.0 kg/cm2.
This is considerably lower than the pressure on the gas side, so if the sealing effect of the backing etc. deteriorates over time, there is a risk that gas may infiltrate into the bushing.
第１図に従来のブッシングの構造を示しており、１はガ
ス側絶縁管、２は大気側絶縁管、３はブッシングをガス
絶縁電気機器に固着するためのフランジ、４は上記両絶
縁管１，２およびフランジ３を貫通した中心導体、５は
上記中心導体を絶縁した絶縁層、６は中心導体４の一端
と螺合された端子金具、７は上記中心導体４の他端に用
いられ上記面かい管と連通され膨張および収縮を吸収可
能なベローズ７ａを有する膨張室、８は圧縮バネ、９は
止メ板、１０は上記圧縮バネ８を圧縮する様に上記中心
導体４に螺合されたねしリングで、上記絶縁管１，２お
よびフランジ３の圧縮力を加えている。Figure 1 shows the structure of a conventional bushing, where 1 is an insulating tube on the gas side, 2 is an insulating tube on the atmosphere side, 3 is a flange for fixing the bushing to gas-insulated electrical equipment, and 4 is both the above-mentioned insulating tubes 1. , 2 and a center conductor passing through the flange 3; 5 an insulating layer insulating the center conductor; 6 a terminal fitting screwed to one end of the center conductor 4; 7 used at the other end of the center conductor 4; An expansion chamber having a bellows 7a communicating with the surface pipe and capable of absorbing expansion and contraction; 8 a compression spring; 9 a stop plate; 10 screwed to the center conductor 4 so as to compress the compression spring 8; A compressive force is applied to the insulating tubes 1, 2 and the flange 3 by a tie ring.
１１．１２はガス油間のシールをしているパツキン、１
３．１４は油−空気間のシールをしているパツキン、１
５はブッシング内の絶縁油である。11.12 is the seal that seals between gas and oil, 1
3.14 is the seal that seals between oil and air, 1
5 is insulating oil inside the bushing.
１６はガス絶縁機器の一端、１７はガス絶縁機器中のガ
ス部、１８はそのシール用のＯリングを示している。Reference numeral 16 indicates one end of the gas insulated equipment, 17 indicates a gas section in the gas insulated equipment, and 18 indicates an O-ring for sealing the same.
この様な構造にあっては、ガス側パツキン１１゜１２の
経年劣化により圧力の高いガス１７がパツキン１１．１
２などよりブッシング内に侵入する。In such a structure, due to aging of the gas side gaskets 11 and 12, the high pressure gas 17 is transferred to the gas side gaskets 11 and 11.
2, etc., into the bushing.
ブッシング内に侵入したガスはある程度油中に溶解され
るが、ある限度以上になれば気泡となって油中を上部へ
昇っていく。Gas that has entered the bushing will be dissolved in the oil to some extent, but once it exceeds a certain limit, it will form bubbles and rise upward through the oil.
この気泡が電界内にあると油に比してガスの比誘電率が
小さいために気泡部の電界強度が大きくなり部分放電を
生じ、ブッシングの劣化やブッシング全体の絶縁破壊を
生じる原因になる。When these bubbles are present in an electric field, the electric field strength at the bubble increases because gas has a smaller dielectric constant than oil, causing partial discharge, which causes deterioration of the bushing and dielectric breakdown of the entire bushing.
またガスの漏れが続けば遂にはガス絶縁機器と同じガス
圧にまでブッシング内圧が上昇しベローズ７ａが破壊す
るおそれもある。Furthermore, if gas leakage continues, the internal pressure of the bushing will eventually rise to the same gas pressure as that of the gas-insulated equipment, and there is a risk that the bellows 7a will be destroyed.
この考案は以上の点に鑑みてなされたものでシール性の
困難な高圧ガスのブッシング内への侵入の全くない油入
ブッシングを提供するものである。This invention was devised in view of the above points, and is intended to provide an oil-filled bushing that does not allow high-pressure gas, which is difficult to seal, to enter the bushing.
第２図はこの考案の一実施例を示すもので第１図のもの
と相当する部分には同一符号を付し詳細説明を省略する
。FIG. 2 shows an embodiment of this invention, and parts corresponding to those in FIG. 1 are designated by the same reference numerals and detailed description thereof will be omitted.
１９はガス側絶縁管１の外周に設けた第２のガス側絶縁
管、２０．２１はガス側のパツキン、ガス側絶縁管１，
１９の間隙には絶縁油２２を封入している。19 is a second gas side insulating tube provided on the outer periphery of the gas side insulating tube 1, 20.21 is a gas side packing, gas side insulating tube 1,
Insulating oil 22 is sealed in the gap 19.
ブッシングのフランジ３にはベローズ２３、油容器２４
から構成される圧力抑制部を取り付け、ガス側絶縁管１
と第２のガス側絶縁管１９の間隙内絶縁油２２は通油管
２６により油容器に連通される。The bushing flange 3 has a bellows 23 and an oil container 24.
Attach the pressure suppressor consisting of the gas side insulating pipe 1
The insulating oil 22 in the gap between the second gas-side insulating pipe 19 and the second gas-side insulating pipe 19 are communicated with the oil container through an oil pipe 26.
またベローズ２３の内部は通気口２７によりガス部１７
と連通されベローズ２３内にはガス絶縁機器のガスが充
満している。In addition, the inside of the bellows 23 is provided with a gas section 17 by a vent hole 27.
The bellows 23 is filled with gas from the gas insulated equipment.
この様な構造とすることにより、絶縁油２２の温度変化
による体積変化はベローズ２３の伸縮により吸収される
と共に、ベローズを介してガス部１７のガス圧が常に加
えられており絶縁油２２の圧力はガス部１７の圧力と常
に等しい。With this structure, volume changes due to temperature changes in the insulating oil 22 are absorbed by the expansion and contraction of the bellows 23, and the gas pressure of the gas section 17 is constantly applied via the bellows, so that the pressure of the insulating oil 22 is is always equal to the pressure in the gas section 17.
このため第２のガス側絶縁管１９の端面のパツキン２０
．２１部の内外は同一圧力となり、ガスがパツキン２０
．２１を通ってブッシング内に侵入することはなくなる
と共に第２のガス側絶縁管１９も薄いものでよくそれ程
機械的強度を有しない。Therefore, the gasket 20 on the end face of the second gas side insulating tube 19
．． The pressure inside and outside of the 21st part is the same, and the gas is
．． 21 into the bushing, and the second gas side insulating tube 19 is also thin and does not have much mechanical strength.
ガス側絶縁管１の外部の絶縁油２２はガス圧と同圧とな
っているが、絶縁油のシールはガスのシールに比べては
るかに容易であるためガス側絶縁管１の端面のガスケツ
Ｈ１，１２の設計は極めで容易となり、シールの信頼性
は極めて高くなる。The insulating oil 22 outside the gas side insulating tube 1 has the same pressure as the gas pressure, but sealing the insulating oil is much easier than sealing gas, so the gasket H1 on the end face of the gas side insulating tube 1 , 12 is extremely easy to design, and the reliability of the seal is extremely high.
またベローズ２３と油容器２４の間に電気接点２５を設
は油の膨張収縮によるベローズ２３の伸縮では働かない
様に調整しておけば、仮にガスケツ）１１，１２部より
絶縁油２２がブッシング内に侵入しても容易に検出する
ことができる。In addition, if the electric contact 25 is installed between the bellows 23 and the oil container 24 and adjusted so that it does not work due to the expansion and contraction of the bellows 23 due to the expansion and contraction of oil, it is possible to prevent the insulating oil 22 from entering the bushing from gaskets 11 and 12 It can be easily detected even if it invades.
しがもこの場合ブッシング内絶縁油１５に比べて絶縁油
２２は少量であるのでブッシングの内圧上昇はわずかで
あり、また絶縁の低下も劣化も生じない。However, in this case, since the amount of insulating oil 22 is smaller than the insulating oil 15 in the bushing, the internal pressure of the bushing increases only slightly, and the insulation does not deteriorate or deteriorate.
また本考案によればガスケツ）−１１，１２よりの絶縁
油の侵入が生じてもブッシング内絶縁油を侵入量だけ抜
き取り油容器２４に補充すればそのまま使用してさしつ
かえな〈従来のように緊急に処置する必要もなく保守、
管理上極めて容易となる。Furthermore, according to the present invention, even if insulating oil intrudes from the gaskets (11 and 12), the insulating oil in the bushing can be extracted by the intruding amount and refilled into the oil container 24, and the oil container 24 can be used as is. No need for maintenance,
This makes management extremely easy.
なお、上記説明では大気中にて使用されるブッシングの
例を説明したが、大気側絶縁管２１が絶縁油中で使用さ
れる場合も全く同様の効果が期待できる。In addition, although the above description has been given as an example of a bushing used in the atmosphere, exactly the same effect can be expected when the atmosphere-side insulating tube 21 is used in insulating oil.
第１図は従来の油入ブッシングの断面図、第２図はこの
考案の一実施例を示す断面図である。
図中、１，１９はガス側絶縁管、２は大気側絶縁管、３
はフランジ、１１．１２．２０．２１はパツキン、２２
は絶縁油、２３はベローズ、２４は油容器、２５は電気
接点を示す。
尚、図中同一符号は同−又は相当部分を示す。FIG. 1 is a sectional view of a conventional oil-filled bushing, and FIG. 2 is a sectional view showing an embodiment of this invention. In the figure, 1 and 19 are gas side insulated tubes, 2 is atmospheric side insulated tubes, and 3
is flange, 11.12.20.21 is packing, 22
23 is an insulating oil, 23 is a bellows, 24 is an oil container, and 25 is an electrical contact. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (2)
おいて、ガス絶縁機器側絶縁管を２重に形威し前記絶縁
管の間隙に絶縁油を充填密封し、前記絶縁油の体積変化
を吸収変形するベローズをガス中に設けたことを特徴と
する油入ブッシング。(1) In an oil-filled bushing used for gas-insulated electrical equipment, the insulating tube on the gas-insulated equipment side is double-shaped, the gap between the insulating tubes is filled and sealed with insulating oil, and the volume change of the insulating oil is absorbed and deformed. An oil-filled bushing characterized by having a bellows inside the gas.
ことを特徴とする実用新案登録請求の範囲第１項記載の
油入ブッシング。(2) The oil-filled bushing according to claim 1, which is characterized by being provided with an alarm device for detecting dimensional changes in the bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1221579U JPS5922662Y2 (en) | 1979-01-31 | 1979-01-31 | oil-filled bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1221579U JPS5922662Y2 (en) | 1979-01-31 | 1979-01-31 | oil-filled bushing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55112332U JPS55112332U (en) | 1980-08-07 |
| JPS5922662Y2 true JPS5922662Y2 (en) | 1984-07-06 |
Family
ID=28828069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1221579U Expired JPS5922662Y2 (en) | 1979-01-31 | 1979-01-31 | oil-filled bushing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5922662Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012035596A1 (en) * | 2010-09-13 | 2012-03-22 | 三菱電機株式会社 | Gas-insulated electrical appliance |
| DE112011104424B4 (en) | 2010-12-17 | 2019-03-28 | Mitsubishi Electric Corporation | Gas-insulated switchgear |
-
1979
- 1979-01-31 JP JP1221579U patent/JPS5922662Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55112332U (en) | 1980-08-07 |
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