JP2601339Y2 - Gas insulated transformer - Google Patents
Gas insulated transformerInfo
- Publication number
- JP2601339Y2 JP2601339Y2 JP1992010849U JP1084992U JP2601339Y2 JP 2601339 Y2 JP2601339 Y2 JP 2601339Y2 JP 1992010849 U JP1992010849 U JP 1992010849U JP 1084992 U JP1084992 U JP 1084992U JP 2601339 Y2 JP2601339 Y2 JP 2601339Y2
- Authority
- JP
- Japan
- Prior art keywords
- shield
- gas
- outer periphery
- insulated transformer
- shield fitting
- 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 - Fee Related
Links
Landscapes
- Insulating Of Coils (AREA)
- Transformer Cooling (AREA)
Description
【考案の詳細な説明】
【０００１】
【産業上の利用分野】本考案は、例えば電子線照射装置
の直流電源用ガス絶縁変圧器等として用いて好適なガス
絶縁変圧器に関するものである。
【０００２】
【従来の技術】図５〜図７は、従来のこの種のガス絶縁
変圧器の構造を示したものである。図示のように、本実
施例のガス絶縁変圧器は、鉄心脚部１を有し、該鉄心脚
部１の外周には巻形２が設けられている。巻形２の外周
には、成層巻となるように電線とプラスチックフイルム
とで１次コイル３が設けられている。１次コイル３の外
周には、プラスチックフイルムの如き絶縁材（図示せ
ず）を介して銅板からなる混触防止板４が設けられてい
る。該混触防止板４には、図示しないが１ターン防止ス
リットが設けられている。また、該混触防止板４は、図
示しない鉄心締付け金物に同電位固定されている。
【０００３】混触防止板４の外周には、ガス絶縁空間５
を隔ててアルミニウム製のシールド金具６が同軸状に配
置されている。該シールド金具６の両端は、外向きに円
弧状に湾曲された湾曲部６ａとなっている。シールド金
具６には、１ターン防止スリット７が設けられている。
シールド金具６の湾曲部６ａ内には、ウレタン樹脂の如
き樹脂体８が充填され、これによりシールド金具６の１
ターン防止スリット７が潰れないように保持されてい
る。
【０００４】シールド金具６の外周には、電線の巻初め
端を該シールド金具６に電位固定して所定のプラスチッ
クフィルムを挟みながら成層巻にて２次コイル９が設け
られている。２次コイル９の外周には、２次コイル９の
巻終り端を電位固定して電位固定板１０が設けられてい
る。この電位固定板１０にも、１ターン防止スリット１
１が設けられている。シールド金具６の両端の各湾曲部
５ａに対向してそれらの外側には、低圧側面シールド１
２が設けられている。なお、図示しないが２次コイル９
は平等電界に近い箇所でエポキシ製支持碍子等で接地側
から浮かされている。
【０００５】このようなガス絶縁変圧器は、図示しない
気密容器内に収容され、ＳＦ６ガス等でガス絶縁されて
いる。
【０００６】
【考案が解決しようとする課題】しかしながら、このよ
うな従来のガス絶縁変圧器におけるシールド金具６は、
電流容量が増えて２次コイル９の電線が太径になると、
該電線の締付け力が増して１ターン防止スリット１１が
潰れて接触する方向に力を受け、樹脂体８による拘束力
だけでは耐えきれなくなる問題点があった。また、電圧
比が増して２次巻線数が増えた場合にも、同様の現象が
起こる。
【０００７】更に、シールド金具６の１ターン防止スリ
ット１１に強度のある絶縁成形物を当てることも考えら
れるが、１次コイル４と２次コイル９との間の絶縁距離
が狭いため、突起物を設けられない問題点がある。ま
た、直流に対する耐圧性能上、帯電による表面閃絡が発
生する可能性がある等の理由により絶縁材料に制約があ
る。
【０００８】本考案の目的は、シールド金具の１ターン
防止スリットの潰れを防止できるガス絶縁変圧器を提供
することにある。
【０００９】
【課題を解決するための手段】上記の目的を達成する本
考案の構成を説明すると、本考案は１次コイルの外周に
ガス絶縁空間を隔ててシールド金具が同軸状に配置さ
れ、前記シールド金具には１ターン防止スリットが設け
られ、前記シールド金具の外周には２次コイルが設けら
れているガス絶縁変圧器において、前記シールド金具の
外周には取付け用の割り面を有する分割型のシールド金
具保持絶縁筒が固定され、前記シールド金具保持絶縁筒
の外周に前記２次コイルが該シールド金具保持絶縁筒に
径方向締付け圧力を負担させて設けられていることを特
徴とする。
【００１０】
【作用】このようにシールド金具の外周に取付け用の割
り面を有する分割型のシールド金具保持絶縁筒を固定す
ると、内周面側がガス絶縁空間となっている該シールド
金具に２次コイルから締付け力が作用してもその締付け
力を該シールド金具保持絶縁筒で負担するので、シール
ド金具の１ターン防止スリットの潰れを防止できる。
【００１１】
【実施例】図１〜図４は、直流電源用ガス絶縁変圧器等
として用いることができる本考案に係るガス絶縁変圧器
の一実施例を示したものである。なお、前述した図５〜
図７と対応する部分には、同一符号を付けて示してい
る。
【００１２】図示のように、本実施例のガス絶縁変圧器
においては、内周面側がガス絶縁空間５となっているシ
ールド金具６の外周には２つ割りに分割されて取付けを
容易に行える構造のシールド金具保持絶縁筒１３が固定
されている。該シールド金具保持絶縁筒１３はＦＲＰ等
で形成されていて、両面粘着テープや接着剤等でシール
ド金具６の外周に貼付け固定されている。シールド金具
保持絶縁筒１３の取付け用の割り面１３ａは、シールド
金具６の外周に該シールド金具保持絶縁筒１３を嵌め付
けた後、エポキシ樹脂接着剤等で接着されている。該シ
ールド金具保持絶縁筒１３の外周には、該シールド金具
保持絶縁筒１３径方向締付け圧力を負担させて２次コイ
ル９が設けられている。この場合、２次コイル９の巻始
め端は、シールド金具６に電位固定されている。
【００１３】このようなガス絶縁変圧器を、例えば電子
線照射装置の直流電源用ガス絶縁変圧器として用いた場
合、安定したガス絶縁性能を得るため、１次コイル３と
２次コイル９の間は同軸構造のガス空間としているの
で、直流帯電等の懸念が全くない。また、絶縁距離を変
えることなく、シールド金具保持絶縁筒１３の厚み分だ
け大きくなるだけなので、大型化を可及的に避けること
ができ、また、コストの上昇も可及的に避けることがで
きる。
【００１４】かかるガス絶縁変圧器は、２次コイル９の
周方向及び径方向締付け力が全てシールド金具保持絶縁
筒１３で負担されるので、内周面側がガス絶縁空間５と
なっているシールド金具６には外力がかからず、１ター
ン防止スリット７の潰れを防止できる。また、シールド
金具保持絶縁筒１３は、１次コイル３と２次コイル９の
間に位置するので、両者の絶縁を安定させることができ
る。
【００１５】
【考案の効果】以上説明したように本考案に係るガス絶
縁変圧器は、シールド金具の外周に取付け用の割り面を
有する分割型のシールド金具保持絶縁筒を固定したの
で、内周面側がガス絶縁空間となっている該シールド金
具には２次コイルから締付け力が作用してもその締付け
力を該シールド金具保持絶縁筒で負担することができ、
このため該シールド金具の１ターン防止スリットの潰れ
を防止することができる。また、該シールド金具保持絶
縁筒が１次コイルと２次コイルの間に位置するので、両
者の絶縁を安定させることができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated transformer suitable for use as, for example, a gas-insulated transformer for a DC power supply of an electron beam irradiation apparatus. 2. Description of the Related Art FIGS. 5 to 7 show the structure of a conventional gas insulated transformer of this type. As shown, the gas insulated transformer of the present embodiment has an iron core leg 1, and a winding 2 is provided on the outer periphery of the iron core leg 1. A primary coil 3 is provided on the outer periphery of the winding form 2 with an electric wire and a plastic film so as to form a layered winding. On the outer periphery of the primary coil 3, an anti-contact plate 4 made of a copper plate is provided via an insulating material (not shown) such as a plastic film. Although not shown, the touch prevention plate 4 is provided with a one-turn prevention slit. Further, the contact prevention plate 4 is fixed at the same potential to an iron core fastener (not shown). [0003] A gas insulating space 5 is provided on the outer periphery of the contact prevention plate 4.
An aluminum shield fitting 6 is coaxially arranged with a space therebetween. Both ends of the shield 6 are curved portions 6a that are curved outward in an arc shape. The shield fitting 6 is provided with a one-turn prevention slit 7.
The curved portion 6a of the shield 6 is filled with a resin body 8 such as urethane resin.
The turn prevention slit 7 is held so as not to be crushed. [0004] A secondary coil 9 is provided on the outer periphery of the shield metal member 6 by laminar winding while fixing a potential at the beginning of the electric wire to the shield metal member 6 and sandwiching a predetermined plastic film. A potential fixing plate 10 is provided on the outer periphery of the secondary coil 9 to fix the winding end of the secondary coil 9 to a potential. This potential fixing plate 10 also has a one-turn prevention slit 1
1 is provided. Opposite to each curved portion 5a at both ends of the shield fitting 6, a low-voltage side shield 1 is provided outside thereof.
2 are provided. Although not shown, the secondary coil 9
Is floated from the ground side by a support insulator made of epoxy or the like at a location near an equal electric field. [0005] Such gas insulated transformer is housed in an airtight container not shown, is a gas insulated SF 6 gas or the like. [0006] However, the shield fitting 6 in such a conventional gas insulated transformer,
When the current capacity increases and the wire of the secondary coil 9 becomes thicker,
There has been a problem that the tightening force of the electric wire is increased and the one-turn prevention slit 11 is crushed and receives a force in the direction of contact, so that the restraining force by the resin body 8 alone cannot withstand. A similar phenomenon occurs when the voltage ratio increases and the number of secondary windings increases. Further, it is conceivable to apply a strong insulating molded product to the one-turn prevention slit 11 of the shield fitting 6, but since the insulation distance between the primary coil 4 and the secondary coil 9 is small, a protrusion is required. There is a problem that cannot be provided. In addition, there is a restriction on the insulating material due to the possibility that surface flashing due to charging may occur due to the withstand voltage performance against direct current. An object of the present invention is to provide a gas-insulated transformer capable of preventing a one-turn prevention slit of a shield fitting from being crushed. Means for Solving the Problems [0009] The constitution of the present invention which achieves the above object will be described. In the present invention, a shield metal is coaxially arranged on the outer periphery of a primary coil with a gas insulating space therebetween. the shield shell 1 turn anti slit is provided, in a gas insulated transformer secondary coil is provided on an outer periphery of the shield fitting, split having an outer peripheral split surfaces for attachment to the shield metal shield fitting retention insulating tube is fixed to the secondary coil the shield fitting retention insulating tube on the outer periphery of the shield fitting holding the insulating cylinder
It is characterized by being provided with a radial tightening pressure . [0010] As described above, the mounting bracket is provided around the outer periphery of the shield fitting.
Ri When fixing the split shield fitting retention insulating tube having a face, the inner peripheral surface side the shield bracket holding the clamping force also acts clamping force from the secondary coil to the shield metal which is a gas insulated space Since the insulation tube bears the burden, the one-turn prevention slit of the shield fitting can be prevented from being crushed. FIGS. 1 to 4 show an embodiment of a gas-insulated transformer according to the present invention which can be used as a gas-insulated transformer for a DC power supply and the like. In addition, FIG.
Parts corresponding to those in FIG. 7 are denoted by the same reference numerals. As shown in the figure, in the gas insulating transformer of the present embodiment, the outer periphery of a shield metal fitting 6 whose inner peripheral surface side is a gas insulating space 5 is divided into two parts. Mounting
A shield fitting holding insulating cylinder 13 having a structure that can be easily performed is fixed. The shield metal holding insulating cylinder 13 is made of FRP or the like, and is adhered and fixed to the outer periphery of the shield metal 6 with a double-sided adhesive tape or an adhesive. The split surface 13a for attaching the shield fitting holding insulating cylinder 13 is attached with an epoxy resin adhesive or the like after the shield fitting holding insulating cylinder 13 is fitted to the outer periphery of the shield fitting 6. The outer periphery of the shield fitting retention insulating tube 13, the shield fitting
The secondary coil 9 is provided so as to bear the holding pressure of the holding insulating cylinder 13 in the radial direction . In this case, the winding start end of the secondary coil 9 is fixed to the potential of the shield fitting 6. When such a gas-insulated transformer is used, for example, as a gas-insulated transformer for a DC power supply of an electron beam irradiator, a stable gas-insulating performance is required to obtain a stable Is a gas space having a coaxial structure, so there is no concern about DC charging or the like. In addition, since the thickness is increased by the thickness of the shield fitting holding insulating cylinder 13 without changing the insulation distance, the size can be avoided as much as possible, and the increase in cost can be avoided as much as possible. . In such a gas-insulated transformer, since all the circumferential and radial tightening forces of the secondary coil 9 are borne by the shield metal holder insulating cylinder 13, the inner peripheral surface side is in contact with the gas-insulated space 5.
The external force is not applied to the shield metal member 6, and the one-turn prevention slit 7 can be prevented from being crushed. Further, since the shield metal holding cylinder 13 is located between the primary coil 3 and the secondary coil 9, the insulation between the two can be stabilized. As described above, the gas-insulated transformer according to the present invention has a split surface for mounting on the outer periphery of the shield fitting.
Since the split-type shield fitting holding and insulating cylinder having the fixing is fixed, even if a tightening force is applied from the secondary coil to the shield fitting whose inner peripheral surface is a gas insulating space, the tightening force is applied to the shield fitting holding insulation. Can be borne by the tube,
Therefore, it is possible to prevent the one-turn prevention slit of the shield fitting from being crushed. Further, since the shield metal holding insulating cylinder is located between the primary coil and the secondary coil, the insulation between the two can be stabilized.
【図面の簡単な説明】
【図１】本考案に係るガス絶縁変圧器の一実施例の要部
縦断面図である。
【図２】図１のＸ−Ｘ線横断面図である。
【図３】図１で用いているシールド金具とシールド金具
保持絶縁筒との関係を示す一部縦断側面図である。
【図４】図１で用いているシールド金具保持絶縁筒の斜
視図である。
【図５】従来のガス絶縁変圧器の一実施例の要部縦断面
図である。
【図６】図５のＹ−Ｙ線横断面図である。
【図７】図５で用いているシールド金具を示す一部縦断
側面図である。
【符号の説明】
１…鉄心脚部、２…巻形、３…１次コイル、４…混触防
止板、５…ガス絶縁空間、６…シールド金具、６ａ…湾
曲部、７…１ターン防止スリット、８…樹脂体、９…２
次コイル、１０…１ターン防止スリット、１２…低圧側
面シールド、１３…シールド金具保持絶縁筒、１３ａ…
割り面。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a main part of an embodiment of a gas-insulated transformer according to the present invention. FIG. 2 is a cross-sectional view taken along line XX of FIG. FIG. 3 is a partially longitudinal side view showing a relationship between a shield fitting and a shield fitting holding insulating cylinder used in FIG. 1; FIG. 4 is a perspective view of a shield fitting holding insulating cylinder used in FIG. 1; FIG. 5 is a longitudinal sectional view of a main part of one embodiment of a conventional gas-insulated transformer. FIG. 6 is a transverse sectional view taken along line YY of FIG. 5; FIG. 7 is a partially longitudinal side view showing a shield fitting used in FIG. 5; [Description of Signs] 1 ... iron leg, 2 ... wound, 3 ... primary coil, 4 ... contact prevention plate, 5 ... gas insulation space, 6 ... shield fitting, 6a ... curved portion, 7 ... 1 turn prevention slit , 8 ... resin body, 9 ... 2
Next coil, 10 ... 1 turn prevention slit, 12 ... low voltage side shield, 13 ... shield metal fitting holding insulating cylinder, 13a ...
Split face.
Claims (1)
てシールド金具が同軸状に配置され、前記シールド金具
には１ターン防止スリットが設けられ、前記シールド金
具の外周には２次コイルが設けられているガス絶縁変圧
器において、 前記シールド金具の外周にはシールド金具保持絶縁筒が
固定され、前記シールド金具保持絶縁筒の外周に前記２
次コイルが設けられていることを特徴とするガス絶縁変
圧器。A shield is coaxially arranged on the outer periphery of a primary coil with a gas insulating space therebetween, a one-turn preventing slit is provided in the shield, and a secondary coil is provided on the outer periphery of the shield. In the gas insulating transformer provided, a shield fitting holding insulating cylinder is fixed to an outer periphery of the shield fitting, and the shield fitting holding insulating cylinder is attached to an outer periphery of the shield fitting holding insulating cylinder.
A gas-insulated transformer comprising a secondary coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992010849U JP2601339Y2 (en) | 1992-03-04 | 1992-03-04 | Gas insulated transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992010849U JP2601339Y2 (en) | 1992-03-04 | 1992-03-04 | Gas insulated transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0572116U JPH0572116U (en) | 1993-09-28 |
| JP2601339Y2 true JP2601339Y2 (en) | 1999-11-15 |
Family
ID=11761805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992010849U Expired - Fee Related JP2601339Y2 (en) | 1992-03-04 | 1992-03-04 | Gas insulated transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2601339Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5824001B2 (en) * | 2013-04-23 | 2015-11-25 | 三菱電機株式会社 | Trance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6052609U (en) * | 1983-09-19 | 1985-04-13 | 日新電機株式会社 | isolation transformer |
-
1992
- 1992-03-04 JP JP1992010849U patent/JP2601339Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0572116U (en) | 1993-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19990817 |
|
| LAPS | Cancellation because of no payment of annual fees |