JPH04261319A - Conductor tube for phase separation bus and its manufacture - Google Patents
Conductor tube for phase separation bus and its manufactureInfo
- Publication number
- JPH04261319A JPH04261319A JP2158691A JP2158691A JPH04261319A JP H04261319 A JPH04261319 A JP H04261319A JP 2158691 A JP2158691 A JP 2158691A JP 2158691 A JP2158691 A JP 2158691A JP H04261319 A JPH04261319 A JP H04261319A
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- tube
- backing ring
- welding
- wall thickness
- 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.)
- Granted
Links
- 239000004020 conductor Substances 0.000 title claims abstract description 105
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000005191 phase separation Methods 0.000 title claims abstract description 4
- 238000003466 welding Methods 0.000 claims abstract description 52
- 239000011324 bead Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 3
- 230000035515 penetration Effects 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
- Installation Of Bus-Bars (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、発電所において、発
電機と主変圧器との間を接続する場合などに用いる相分
離母線用導体管及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conductor tube for a phase-separated busbar used in connection between a generator and a main transformer in a power plant, and a method for manufacturing the same.
【０００２】0002
【従来の技術】相分離母線は導体として使用される複数
個の円筒状の導体管とこれらより大きな外径を有しこれ
らを内部に絶縁的に収容する外被管として使用される円
筒状の導体管とから成る。導体にはたとえば２０ｋＶ、
数〜数十ｋＡの大電流が通電される。この電流によって
発生する漏れ磁束を相殺するために、接地された外被管
にも、導体の電流と同じ大きさで１８０゜位相が異なる
外被電流が流される。[Prior Art] A phase-separated bus bar consists of a plurality of cylindrical conductor tubes used as conductors and a cylindrical tube having a larger outer diameter and used as a jacket tube for insulatingly housing them inside. It consists of a conductor tube. For example, 20kV for the conductor,
A large current of several to several tens of kA is applied. In order to cancel the leakage flux generated by this current, a jacket current having the same magnitude as the current in the conductor but having a phase difference of 180° is passed through the grounded jacket tube as well.
【０００３】以上の大電流の交流通電とその表皮効果を
考慮しつつ所定の通電断面積を得るため、上記の導体及
び外被管として使用される導体管はいずれも一般に肉厚
１０ｍｍ前後の工業用純アルミニウム又はアルミニウム
合金によって製作される。次に図９に示した導体管（１
）を例に、その構造を説明する。円筒形に成形されたア
ルミニウム板のあわせ目がとび溶接されて最長２ｍ程度
の１本の導体単管（２ａ）（２ｂ）（２ｃ）が製作され
ている。この導体単管の複数本が必要に応じて周溶接接
続（３）（３）されて導体管（１）として使用される。[0003] In order to obtain a predetermined current carrying cross-sectional area while taking into consideration the large current alternating current conduction and its skin effect, the conductor tubes used as the conductors and jacket tubes are generally industrial tubes with a wall thickness of about 10 mm. Manufactured from pure aluminum or aluminum alloy. Next, the conductor tube (1
) is used as an example to explain its structure. A single conductor tube (2a), (2b), and (2c) with a maximum length of about 2 m is manufactured by welding the joints of cylindrical aluminum plates together. A plurality of these single conductor tubes are circumferentially welded and connected (3) (3) as necessary and used as the conductor tube (1).
【０００４】図１０に上記周溶接接続部（３）の拡大断
面を示した。大電流通電に伴う溶接接続部の異常発熱及
び接続部の経年劣化を防止するため、上記の周溶接接続
部は素材肉厚方向の溶け込み深さが確実に１００％とな
るようにＶ形開先（９ａ）（９ｂ）で開先みぞ深さの深
い突き合わせ溶接構造としている（この溶接構造を以降
略してＶ形溶接と呼ぶ）。又導体単管（２ａ）（２ｂ）
間の接続を容易にするため、あらかじめ一方の導体単管
（２ａ）の端に裏当てリング（８）を図中矢印Ｘ方向（
管の内側）からのとび溶接により取り付けてある。FIG. 10 shows an enlarged cross section of the circumferential welded joint (3). In order to prevent abnormal heat generation of the welded joint due to the application of large current and deterioration of the joint over time, the circumferential welded joint mentioned above has a V-shaped groove to ensure that the penetration depth in the material thickness direction is 100%. (9a) and (9b) have a butt welded structure with a deep groove depth (hereinafter this welded structure will be abbreviated as V-shaped welding). Also conductor single tube (2a) (2b)
In order to facilitate the connection between the two, attach a backing ring (8) to the end of one of the single conductor tubes (2a) in the direction of arrow X (in the figure) in advance.
It is attached by jump welding from the inside of the pipe.
【０００５】[0005]
【発明が解決しようとする課題】上記のように従来は導
体単管の端部にＶ字形の開先加工（９ａ）（９ｂ）を施
すことが必要であった。しかし導体単管が大口径（通常
４００ｍｍ〜１５００ｍｍ）であり、その材質（アルミ
ニウム）が軟弱なためＶ字形の開先加工の作業性が悪か
った。又Ｖ形溶接であるため、外面から見える溶接ビー
ド幅（図中Ａで示す幅）は数値的には導体単管素材のア
ルミニウム板の肉厚の約２倍程度と大きくなり、それに
従ってビード部分が大きく盛り上がるので、外観の美観
を保つため導体単管外形と同じ高さになるように接続部
を研磨する要求がある場合もあった。また裏当てリング
（８）を一方の導体単管（２ａ）の端に溶接するに当っ
て管の内側に作業者が顔、体の一部、溶接トーチ等を入
れて無理な姿勢で溶接作業を行う必要があり作業性が悪
かった。As described above, conventionally it has been necessary to form V-shaped grooves (9a) (9b) on the ends of single conductor tubes. However, since the single conductor tube has a large diameter (usually 400 mm to 1500 mm) and its material (aluminum) is soft and weak, the workability of V-shaped beveling was poor. Also, since it is a V-shaped weld, the weld bead width visible from the outside (width indicated by A in the figure) is numerically large, approximately twice the wall thickness of the aluminum plate that is the material of the single conductor tube, and the bead portion is adjusted accordingly. In some cases, it was necessary to polish the connection part so that it was at the same height as the outer diameter of the single conductor tube in order to maintain its aesthetic appearance. In addition, when welding the backing ring (8) to the end of one conductor single tube (2a), the worker puts his face, part of his body, welding torch, etc. inside the tube and performs the welding work in an awkward position. It was necessary to do this, and the workability was poor.
【０００６】この発明は、上記のような問題点を解決す
るためになされたもので、周溶接のための開先加工及び
裏当てリングの溶接の作業性が良く、更に溶接ビード幅
も小さく外観の美観を保つことが可能な相分離母線用導
体管及びその製造方法を提供することを目的とする。[0006] This invention was made to solve the above-mentioned problems, and has good workability in groove processing for circumferential welding and backing ring welding, and also has a small weld bead width and a good appearance. An object of the present invention is to provide a conductor tube for a phase-separated busbar that can maintain the aesthetic appearance of the phase separation busbar, and a method for manufacturing the same.
【０００７】[0007]
【課題を解決するための手段】この発明に係る相分離母
線用導体管は、肉厚ｔを有する第１の導体単管、前記第
１の導体単管と同軸に、端部を互に対向させて、端部間
のギャップを実質的に０．７×ｔに選択して位置させた
肉厚ｔを有する第２の導体単管、前記ギャップを前記第
１及び第２の導体単管の内壁側から塞ぐ裏当てリング、
前記第１及び第２の導体単管の端部及び前記裏当てリン
グによって囲まれた前記ギャップ全体に充満して形成さ
れた周溶接ビード部分、を具備する。[Means for Solving the Problems] A conductor tube for a phase-separated bus bar according to the present invention includes a first single conductor tube having a wall thickness t, coaxial with the first single conductor tube, and having ends facing each other. a second conductor single tube having a wall thickness t, with a gap between its ends selected to be substantially 0.7×t, and the gap between the first and second conductor single tubes Backing ring that closes from the inner wall side,
A circumferential weld bead portion is formed to fill the entire gap surrounded by the ends of the first and second single conductor tubes and the backing ring.
【０００８】この発明に係る相分離母線用導体管の製造
方法は、肉厚がｔである第１の導体単管の端部に裏当て
リングの一部を挿入する工程、前記第１の同導体単管の
端部と裏当てリングの外周面の接触部を溶接することに
よって第１の導体単管に裏当てリングを接続する工程、
前記第１の導体単管の端部と肉厚がｔである第２の導体
単管の端部との間のギャップを実質的に０．７×ｔに選
択しつつ、前記裏当てリングを同第２の導体単管に挿入
する工程、前記第１及び第２の導体単管の端部及び前記
裏当てリングによって囲まれた前記ギャップ全体を充満
するように、ギャップから外に露出している裏当てリン
グの外面及び導体単管の端面に対し外側から周溶接ビー
ド部分を形成する周溶接工程、を具備する。The method for manufacturing a conductor tube for a phase-separated bus bar according to the present invention includes the steps of inserting a part of a backing ring into the end of a first single conductor tube having a wall thickness of t; connecting the backing ring to the first conductor single tube by welding the contact portion between the end of the conductor single tube and the outer peripheral surface of the backing ring;
the backing ring while selecting a gap of substantially 0.7×t between the end of the first conductor tube and the end of the second conductor tube having a wall thickness t; inserting the second conductor tube into the second conductor tube, and exposing the second conductor tube to the outside so as to fill the entire gap surrounded by the ends of the first and second conductor tubes and the backing ring. a circumferential welding step of forming a circumferential weld bead portion from the outside on the outer surface of the backing ring and the end surface of the single conductor tube.
【０００９】[0009]
【作用】この発明において、肉厚ｔを有する第１及び第
２の導体単管の端部間のギャップが実質的に０．７ｔで
あるので、第１及び第２の導体単管の端部及び裏当てリ
ングによって囲まれたギャップ全体に周溶接ビード部分
が充満し、裏当てリングに到達して形成される。更にこ
の発明の相分離母線用導体管の製造工程において第１の
導体単管と裏当てリングの溶接接続が第１の導体単管の
端部と裏当てリングの外周面の接触部において行われる
。[Operation] In this invention, since the gap between the ends of the first and second single conductor tubes having the wall thickness t is substantially 0.7t, the ends of the first and second single conductor tubes have a wall thickness of t. and a circumferential weld bead portion fills the entire gap surrounded by the backing ring and reaches the backing ring to form. Furthermore, in the manufacturing process of the phase-separated busbar conductor tube of the present invention, the welding connection between the first single conductor tube and the backing ring is performed at the contact portion between the end of the first single conductor tube and the outer peripheral surface of the backing ring. .
【００１０】0010
【実施例】図２はこの一実施例による相分離母線用の導
体管（１２）を構成する導体単管（１２ａ）と導体単管
（１２ｂ）の周溶接接続部の溶接前の拡大断面を示す。
図２に示すように導体単管（１２ａ）（１２ｂ）の端面
（開先面）（１９ａ）（１９ｂ）は単管表面に対して垂
直である。つまりこの断面は導体単管用の製作材料のア
ルミニウム板を切断した切断面のままである。また一方
の導体単管（１２ａ）の内側に裏当てリング（１８）が
あらかじめ図中矢印Ｙの方向からのとび溶接によって接
続されている。この裏当てリング（１８）は一般に導体
管（１２）と同様に工業用純アルミニウムやアルミニウ
ム合金で製作される。前記端面（１９ａ）（１９ｂ）間
の距離すなわちギャップ幅Ｇの導体単管（１２ａ）（１
２ｂ）の肉厚ｔに対する比（この比を以後ギャップ比ｇ
（＝Ｇ／ｔ）と呼ぶ。）は後述する理由から０．７であ
る。[Example] Figure 2 shows an enlarged cross-section of the circumferential welded connection between the single conductor pipe (12a) and the single conductor pipe (12b) constituting the conductor pipe (12) for a phase-separated bus bar according to this example, before welding. show. As shown in FIG. 2, the end surfaces (groove surfaces) (19a, 19b) of the single conductor tubes (12a, 12b) are perpendicular to the surface of the single tube. In other words, this cross section remains the same as the cut surface of the aluminum plate used to manufacture the single conductor tube. Further, a backing ring (18) is connected in advance to the inside of one of the single conductor tubes (12a) by jump welding from the direction of arrow Y in the figure. This backing ring (18), like the conductor tube (12), is generally made of industrial pure aluminum or aluminum alloy. The conductor single pipe (12a) (1
2b) to the wall thickness t (hereinafter this ratio will be referred to as the gap ratio g
(=G/t). ) is 0.7 for reasons described later.
【００１１】図１に上記周溶接接続部の溶接後の拡大断
面を示す。導体単管の素材と溶接棒が溶けあって形成さ
れた周溶接ビード部（１７）の一部が裏当てリング（１
８）にまで達し、溶け込み深さ１００％の完璧な溶接接
続が達成されていることが分る。以上の溶接は一般にミ
グ（ＭＩＧ）溶接（ｍｅｔａｌ ｉｎｅｒｔ ｇａｓ
ａｒｃ ｗｅｌｄｉｎｇ）やティグ（ＴＩＧ）溶接（ｔ
ｕｎｇｓｔｅｎ ｉｎｅｒｔ ｇａｓ ａｒｃ ｗｅｌ
ｄｉｎｇ）によって行われる。又外面から観察される溶
接ビード幅Ｂは前記肉厚ｔの１．５倍程度で、従来の溶
接ビード幅Ａが肉厚ｔの２倍程あるのに比較して小さく
、それに伴い溶接ビード部の盛り上がりも従来のＶ形溶
接より低くなっている。従って外観上一般的な溶接部と
同程度に見える。FIG. 1 shows an enlarged cross-section of the circumferential welded joint after welding. A part of the circumferential weld bead (17) formed by melting the material of the single conductor pipe and the welding rod is attached to the backing ring (1
8), indicating that a perfect welded connection with a penetration depth of 100% has been achieved. The above welding is generally done by MIG welding (metal inert gas).
arc welding) and TIG welding (t
ungsten inert gas arc well
ding). In addition, the weld bead width B observed from the outside is about 1.5 times the wall thickness t, which is smaller than the conventional weld bead width A, which is about twice the wall thickness t. The height of the weld is also lower than that of conventional V-shaped welding. Therefore, the appearance is similar to that of a general welded part.
【００１２】前記ギャップ比ｇを各々０．５， ０．７
， １．０とした３つの例のテストピースの溶接部の金
属組織を示す断面の写真を図３〜図５に示した。尚これ
らの例では導体単管（１２ａ）（１２ｂ）の肉厚ｔを１
０ｍｍに統一して溶接を行なった。ギャップ比ｇ＝０．
５の場合、図３から明らかなように溶け込み深さが約６
０％であり、溶接ビードと導体単管の内壁面までの残り
約４０％が非溶着部として残っており、裏当てリング（
１８）も脱離してしまっている。すなわちｇ＝０．５で
は溶け込み深さ１００％の溶接は達成できない。ギャッ
プ比ｇ＝１．０の場合、図５から明らかなように、溶け
込み深さは１００％以上であり、溶接ビードも裏当てリ
ング（１８）に十分溶け込んで、溶け込み深さ１００％
の溶接が達成されていることが分る。ところが本例にお
いては溶接完了に必要な溶接パス数がｇ＝０．５やｇ＝
０．７の場合の３回に比較して１回多い４回であった。
つまり他の例に比べて溶接作業時間が増加するという欠
点があった。更に外側より観察される溶接ビード幅も約
２０ｍｍと肉厚ｔの２倍にも達し、従来のＶ形溶接の際
の溶接ビード幅と同程度となっていた。従ってｇ＝１．
０は作業時間や外観の点から適切なギャップ比とはいえ
ない。ギャップ比ｇ＝０．７の場合、図４から明らかな
ように、溶け込み深さは１００％以上であり、溶接ビー
ドも裏当てリング（１８）に十分溶け込んで、溶け込み
深さ１００％の溶接が達成されていることが分る。更に
溶接完了に必要な溶接パス数も３回で、ｇ＝０．５の例
と同様であり、溶接作業時間も適当な範囲である。又外
観より観察される溶接ビード幅も約１６ｍｍと肉厚ｔの
１．６倍であり、従来のＶ形溶接の際の溶接ビード幅よ
り狭くなった。従って溶け込み深さ１００％の溶接を適
当な溶接作業時間で達成でき、かつ従来例の溶接ビード
幅よりも狭い溶接ビード幅を得られるので、ギャップ比
ｇ＝０．７は最適なギャップ比である。[0012] The gap ratio g is 0.5 and 0.7, respectively.
, 1.0 are shown in FIGS. 3 to 5 are cross-sectional photographs showing the metallographic structures of welded parts of three test pieces. In these examples, the wall thickness t of the conductor single tubes (12a) (12b) is 1.
Welding was performed with a uniform thickness of 0 mm. Gap ratio g=0.
5, the penetration depth is approximately 6 as is clear from Figure 3.
0%, and the remaining approximately 40% from the weld bead to the inner wall surface of the single conductor tube remains as a non-welded area, and the backing ring (
18) has also left. That is, when g=0.5, welding with a penetration depth of 100% cannot be achieved. When the gap ratio g=1.0, as is clear from Fig. 5, the penetration depth is 100% or more, and the weld bead is also sufficiently penetrated into the backing ring (18), resulting in a penetration depth of 100%.
It can be seen that welding of 100% was achieved. However, in this example, the number of welding passes required to complete welding is g = 0.5 or g =
The number of times was four times, which is one more time than the three times in the case of 0.7. In other words, there was a drawback that the welding operation time was increased compared to other examples. Furthermore, the weld bead width observed from the outside was approximately 20 mm, which was twice the wall thickness t, and was comparable to the weld bead width during conventional V-shaped welding. Therefore g=1.
0 cannot be said to be an appropriate gap ratio in terms of working time and appearance. When the gap ratio g=0.7, as is clear from Fig. 4, the penetration depth is 100% or more, and the weld bead is also sufficiently penetrated into the backing ring (18), making it possible to weld with a penetration depth of 100%. I see that it has been achieved. Furthermore, the number of welding passes required to complete welding is three, which is the same as the example with g=0.5, and the welding work time is also within an appropriate range. Furthermore, the weld bead width observed from the appearance was approximately 16 mm, which was 1.6 times the wall thickness t, which was narrower than the weld bead width during conventional V-shaped welding. Therefore, welding with 100% penetration depth can be achieved in a suitable welding time, and a weld bead width narrower than that of the conventional example can be obtained, so the gap ratio g = 0.7 is the optimal gap ratio. .
【００１３】実際には図３〜図５に示した実験以外に、
肉厚１０ｍｍ前後の導体用及び外被管用の導体管につい
て数多くの実験を行った。それらの結果から前記ギャッ
プ比ｇ＝０．７近傍が最適であることが分った。つまり
ギャップ比ｇ＝０．７の前後例えば０．６と０．８にお
いても良好な溶接は可能であるが作業性、外観上からギ
ャップ比ｇが実質的に０．７の場合が最適であるという
ことが確認された。次に図６〜図８に導体管（１２）の
製作工程を示した。
図６は導体単管（１２ａ）の斜視図である。導体単管（
１２ａ）は円筒形に成形したアルミニウム板のあわせ目
（１０）をとび溶接して製作されている。次に図７に示
すように導体単管（１２ａ）の内側に裏当てリング（１
８）を図中矢印Ｙの方向すなわち外側からとび溶接によ
って取り付ける（詳細は図２を合わせて参照。）。従来
のＶ形溶接では図１０のＣ部分の突き合わせ部分を密着
させる上で溶接ビードが障害となるのでこのような図２
及び図７に示したＹ方向からの溶接は不可能であった。
これに対して図２より分るように本実施例の場合は突き
合わせ部分を必要としない構造であるのでＹ方向からの
溶接が可能となっている。
このとび溶接は図１０に示した図中Ｘ方向（管の内側か
らの方向）からの従来の裏当てリング（８）の溶接に比
較して作業性が良い。つまり従来は、作業者が顔、体の
一部、溶接トーチ等を導体単管（２ａ）端部からその内
側に入り込ませて、無理な姿勢で溶接作業を行う必要が
あり作業性が悪かった。これに対して図７より分るよう
に、本実施例の裏当てリング（１８）の溶接では従来の
ような無理な姿勢をとる必要がないので、溶接作業の作
業性が良くなった。図８に示すように裏当てリング（１
８）（１８）を取り付けた導体単管（１２ａ）（１２ｂ
）（１２ｃ）を複数本を以上に説明した周溶接（１３）
によって接続して必要な長さｌの導体管（１２）を得る
。In fact, in addition to the experiments shown in FIGS. 3 to 5,
A number of experiments were conducted on conductor tubes for conductors and jacket tubes with a wall thickness of around 10 mm. From these results, it was found that the gap ratio g=near 0.7 is optimal. In other words, good welding is possible with a gap ratio g of around 0.7, for example 0.6 and 0.8, but from the viewpoint of workability and appearance, it is best when the gap ratio g is essentially 0.7. This was confirmed. Next, the manufacturing process of the conductor tube (12) is shown in FIGS. 6 to 8. FIG. 6 is a perspective view of the single conductor tube (12a). Single conductor tube (
12a) is manufactured by jump welding the seam (10) of aluminum plates formed into a cylindrical shape. Next, as shown in Figure 7, the backing ring (1
8) is attached by jump welding from the direction of arrow Y in the figure, that is, from the outside (see also FIG. 2 for details). In conventional V-shaped welding, the weld bead becomes an obstacle to making the butt part of part C in Fig. 10 come into close contact with each other.
Welding from the Y direction shown in FIG. 7 was also impossible. On the other hand, as can be seen from FIG. 2, this embodiment has a structure that does not require an abutting portion, so welding from the Y direction is possible. This skip welding has better workability than the conventional welding of the backing ring (8) from the X direction (direction from the inside of the tube) in the figure shown in FIG. In other words, in the past, the worker had to put his face, part of his body, welding torch, etc. inside the single conductor tube (2a) from the end and perform welding work in an awkward position, which resulted in poor work efficiency. . On the other hand, as can be seen from FIG. 7, when welding the backing ring (18) of this embodiment, there is no need to take an unreasonable posture as in the conventional method, and thus the workability of the welding work is improved. As shown in Figure 8, the backing ring (1
8) Single conductor tube (12a) (12b) with (18) attached
) (12c) with multiple circumferential welds (13) explained above.
to obtain a conductor tube (12) of the required length l.
【００１４】[0014]
【発明の効果】以上のように、この発明によれば第１及
び第２の導体単管の端部及び裏当てリングによって囲ま
れたギャップ全体に周溶接ビード部分が充満し、裏当て
リングに到達して形成されるので、導体単管の端部に格
別の開先加工を施す必要がなく、したがって外観上の溶
接ビード幅も小さい、溶け込み深さが１００％の周溶接
ビード部分を有する相分離母線用導体管が得られる。更
にこの発明の相分離母線用導体管の製造工程において第
１の導体単管と裏当てリングの溶接接続が第１の導体単
管の端部と裏当てリングの外周面の接触部において行わ
れるので第１の導体単管内壁面と裏当てリングの端部の
接触部で溶接接続を行うのに比較して作業性が良いとい
う効果が得られる。As described above, according to the present invention, the circumferential weld bead portion fills the entire gap surrounded by the ends of the first and second single conductor tubes and the backing ring, and the backing ring Since it is formed by reaching the end of the single conductor pipe, there is no need to perform special bevel processing on the end of the single conductor pipe, and therefore the weld bead width in appearance is small. A conductor tube for a separate bus bar is obtained. Furthermore, in the manufacturing process of the phase-separated busbar conductor tube of the present invention, the welding connection between the first single conductor tube and the backing ring is performed at the contact portion between the end of the first single conductor tube and the outer peripheral surface of the backing ring. Therefore, it is possible to obtain the effect that the workability is better than when a weld connection is made at the contact portion between the inner wall surface of the first single conductor tube and the end of the backing ring.
【図１】この発明の一実施例の導体管（１２）を構成す
る導体単管（１２ａ）と導体単管（１２ｂ）の周溶接接
続部の溶接前の拡大断面図。FIG. 1 is an enlarged cross-sectional view before welding of a circumferential welded joint between a single conductor pipe (12a) and a single conductor pipe (12b) constituting a conductor pipe (12) according to an embodiment of the present invention.
【図２】この発明の一実施例の導体管（１２）を構成す
る導体単管（１２ａ）と導体単管（１２ｂ）の周溶接接
続部の溶接後の拡大断面図。FIG. 2 is an enlarged cross-sectional view after welding of the circumferential welded joint of a single conductor pipe (12a) and a single conductor pipe (12b) constituting a conductor pipe (12) according to an embodiment of the present invention.
【図３】ギャップ比ｇ＝０．５のテストピースの溶接部
の金属組織を示す断面の写真。FIG. 3 is a photograph of a cross section showing the metallographic structure of a welded part of a test piece with a gap ratio g=0.5.
【図４】ギャップ比ｇ＝０．７のテストピースの溶接部
の金属組織を示す断面の写真。FIG. 4 is a photograph of a cross section showing the metal structure of a welded part of a test piece with a gap ratio g=0.7.
【図５】ギャップ比ｇ＝１．０のテストピースの溶接部
の金属組織を示す断面の写真。FIG. 5 is a photograph of a cross section showing the metallographic structure of a welded part of a test piece with a gap ratio g=1.0.
【図６】この発明の一実施例に使用する導体単管（１２
ａ）の斜視図。[Fig. 6] Single conductor tube (12
Perspective view of a).
【図７】この発明の一実施例に使用する導体単管（１２
ａ）と裏当てリング（１８）の接続を示す断面図。[Fig. 7] Single conductor tube (12
A sectional view showing the connection between a) and the backing ring (18).
【図８】この発明の一実施例の導体管（１２）の構成を
示す断面図。FIG. 8 is a sectional view showing the configuration of a conductor pipe (12) according to an embodiment of the present invention.
【図９】従来の導体管（２）の構成を示す断面図。FIG. 9 is a sectional view showing the configuration of a conventional conductor pipe (2).
【図１０】従来の導体管（２）を構成する導体単管（２
ａ）と導体単管（２ｂ）の周溶接接続部の溶接後の拡大
断面図。[Fig. 10] Single conductor pipe (2) constituting a conventional conductor pipe (2)
FIG. 3 is an enlarged cross-sectional view of the circumferential welded connection between a) and the single conductor pipe (2b) after welding.
１２ 導体管 １２ａ，１２ｂ 導体単管 １７ 周溶接ビード部 １８ 裏当てリング 12 Conductor pipe 12a, 12b Single conductor tube 17 Circumferential weld bead 18 Backing ring
Claims (2)
の導体単管と同軸に、端部を互に対向させて、端部間の
ギャップを実質的に０．７×ｔに選択して位置させた肉
厚ｔを有する第２の導体単管、前記ギャップを前記第１
及び第２の導体単管の内壁側から塞ぐ裏当てリング、前
記第１及び第２の導体単管の端部及び前記裏当てリング
によって囲まれた前記ギャップ全体に充満して形成され
た周溶接ビード部分、を具備する相分離母線用導体管。1. A first conductor single tube having a wall thickness t;
a second conductor single tube having a wall thickness t and located coaxially with the conductor single tube, with the ends facing each other and a gap between the ends selected to be substantially 0.7×t; the first gap
and a backing ring that closes the second single conductor tube from the inner wall side, and a circumferential weld formed by filling the entire gap surrounded by the ends of the first and second single conductor tubes and the backing ring. A conductor tube for a phase separation bus bar, comprising a bead portion.
当てリングの一部を挿入する工程、前記第１の同導体単
管の端部と裏当てリングの外周面の接触部を溶接するこ
とによって第１の導体単管に裏当てリングを接続する工
程、前記第１の導体単管の端部と肉厚がｔである第２の
導体単管の端部との間のギャップを実質的に０．７×ｔ
に選択しつつ、前記裏当てリングを同第２の導体単管に
挿入する工程、前記第１及び第２の導体単管の端部及び
前記裏当てリングによって囲まれた前記ギャップ全体を
充満するように、ギャップから外に露出している裏当て
リングの外面及び導体単管の端面に対し外側から周溶接
ビード部分を形成する周溶接工程、を具備する相分離母
線用導体管の製造方法。2. A step of inserting a part of a backing ring into an end of a first single conductor tube having a wall thickness of t, and an outer circumferential surface of the end of the first single conductor tube and the backing ring. a step of connecting a backing ring to a first conductor single tube by welding a contact portion of the first conductor single tube, an end of the first conductor single tube and an end of a second conductor single tube having a wall thickness of t; Substantially the gap between 0.7×t
inserting the backing ring into the second conductor tube, filling the entire gap surrounded by the ends of the first and second conductor tubes and the backing ring; A method for manufacturing a conductor tube for a phase-separated bus bar, comprising a circumferential welding step of forming a circumferential weld bead portion from the outside on the outer surface of the backing ring exposed from the gap and the end surface of the single conductor tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3021586A JP2794959B2 (en) | 1991-01-21 | 1991-01-21 | Conductive tube for phase-separated busbar and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3021586A JP2794959B2 (en) | 1991-01-21 | 1991-01-21 | Conductive tube for phase-separated busbar and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04261319A true JPH04261319A (en) | 1992-09-17 |
| JP2794959B2 JP2794959B2 (en) | 1998-09-10 |
Family
ID=12059144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3021586A Expired - Lifetime JP2794959B2 (en) | 1991-01-21 | 1991-01-21 | Conductive tube for phase-separated busbar and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2794959B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5222608U (en) * | 1975-08-06 | 1977-02-17 | ||
| JPS536243A (en) * | 1976-07-06 | 1978-01-20 | Stocznia Szczecinska | Welded joints and method of fabricating the same |
-
1991
- 1991-01-21 JP JP3021586A patent/JP2794959B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5222608U (en) * | 1975-08-06 | 1977-02-17 | ||
| JPS536243A (en) * | 1976-07-06 | 1978-01-20 | Stocznia Szczecinska | Welded joints and method of fabricating the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2794959B2 (en) | 1998-09-10 |
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