JPS59121283A - Duct connector - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 ［発明の技術分野］ 本光明は、例えばガス絶縁開閉装置に用いられる管路連
結装置に関づるものであって、特に、端部にフランジを
有していない容器相互を連結して管路を形成する連結装
置の改良に係るものである。Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a pipe connection device used, for example, in a gas-insulated switchgear, and particularly relates to a pipe connection device that is used for connecting containers that do not have flanges at their ends. This invention relates to an improvement of a connecting device that connects the two to form a conduit.

［発明の技術的背景］ 現在、カス絶縁開閉装置は各所に使用され、それに伴い
変圧器或は第１鉄塔への接続等にもカス絶縁送電路の使
用が増大している。このガス絶縁送電路は、相当長さの
長いものが必要となることから、これに必要なユニット
管路の材料を節約できれば、その公経済的に有利となる
。この様なことからユニット管路相互の連結部に７ラン
ジを形成せず、管路相互を直接溶接する様にしたものが
ある。この場合には、輸送制限内（例えば長さが１２ｍ
〉で・できるだけ長いユニツ１〜管路を工場で製作し、
その管路相互を現地で溶接する方法が望ましい。[Technical Background of the Invention] Currently, cass-insulated switchgears are used in various places, and accordingly, cass-insulated power transmission lines are increasingly used for connections to transformers or first steel towers, etc. Since this gas-insulated power transmission line requires a considerably long length, it would be advantageous from a public and economic standpoint if the material of the unit pipe line required for this line could be saved. For this reason, there is a system in which the pipes are directly welded to each other without forming seven flanges at the joints between the unit pipes. In this case, within the transport limit (for example, the length is 12 m)
〉 ・Make the longest unit 1 ~ pipe in the factory,
It is preferable to weld the pipes together on site.

一方、ガス絶縁送電路は管路内に母線と共に例えはゲー
ジ圧ノ１２ＫＣＩ／ｃｍ２以上の絶縁カスが収納されて
いる為、管路相互間の溶接部に欠陥を右する場合には重
大事故を起こす原因となるので、溶接部が管路内のガス
圧に充分耐えることを検証してＪ＞　＜ことが必要であ
る。On the other hand, gas-insulated power transmission lines contain insulation scum with a gauge pressure of 12KCI/cm2 or more in the pipeline along with the busbar, so if a defect occurs in the weld between the pipelines, a serious accident may occur. It is necessary to verify that the welded part can sufficiently withstand the gas pressure inside the pipe.

［青用技術の問題点］ ところで、この様な管路相互の溶接部は、第１図に示Ｊ
　１ｉｌｉに１ｒ４成されている。即ち、予め一方の管
路１の内側に当て金２の一端が溶接部２ａて取イ」りら
れ、この当て金２をカイトとして他方の管路３の開口部
３ａと管路１の開口部１ａとを突き合せて、双方の突□
き合は部分を溶接部４にＪ：り外周から溶接固定されて
いた。[Problems with blue technology] By the way, such welded parts between pipes are shown in Figure 1.
1r4 has been created in 1ili. That is, one end of the pad 2 is placed in advance at the welded portion 2a inside one of the pipes 1, and this pad 2 is used as a kite to connect the opening 3a of the other pipe 3 and the opening of the pipe 1. Match 1a and strike both □
The joint was fixed by welding to the welded part 4 from the outer periphery.

この様な構成の管路の溶接部４の検証は、管路の外側よ
り溶接部４を放射線或は超音波により照射して溶接欠陥
を検出する非破壊検出方法や、管路内に規定の液圧或は
気圧をかＥ：ｌ管路が破１ｆｌ　Ｌないことを検証する
液圧或は気圧試験が行４１われている１゜ しかし、後者の液圧試験を行う場合、管路が長い為、検
査に要づる液量が膨大ながとなるので、液の供給及びＩ
Ｊ＋除に特殊な装置を要し経湾的負担が大きくなる。ま
た、気１■試験を行う場合は、管路に傷等があり′ｉ′
へ路か破損した時、圧力の圧縮〉ｔが大きい為管路が爆
発的に周囲に飛散する危険がｄうるので、その安全対策
を講じた上で検証を１”ｊわなければならない。即ち、
危険防止作業−＼ｂその為の１ケ１°１品等を整備りる
のに作業時間や人手がいるばかりでなく、不経洛である
。Verification of the welded part 4 of a pipeline with such a configuration can be performed using a non-destructive detection method in which welding defects are detected by irradiating the welded part 4 from the outside of the pipeline with radiation or ultrasonic waves, or by checking a specified method inside the pipeline. A hydraulic or atmospheric pressure test is carried out to verify that there is no damage to the pipe line.However, when conducting the latter hydraulic pressure test, the pipe line is long. Therefore, the amount of liquid required for inspection is enormous, so the liquid supply and I
Special equipment is required for J+ treatment, which increases the medical burden. In addition, when performing a
If the pipeline is damaged, there is a risk that the pipeline will explode into the surrounding area due to the large pressure compression (t), so safety measures must be taken and verification must be carried out. ,
Hazard prevention work - \b Not only does it take time and manpower to prepare each item, each item, etc., but it is also wasteful.

そこで、一般に気圧試験を実施りるｔ）ｔの倹訂方法と
して被破壊検査方法が採用されている。その１つ−Ｃあ
る放帽線試験法を用いる場合は、管路が狭隘場所（開渠
・暗渠部）に設置され管路ど尚の間隔が狭少な場所では
、放射線による検査は成用線発生装置を管路外部に接近
させることか不可能となるので゛採用づることがてきな
いし、ま／Ｃ５火１益な場所に管路を設置しない時でも
、Ｘ線発生装置より発りヨづ−る放射線の火爆から作業
者を保護しなければならない問題がある。Therefore, a destructive inspection method is generally adopted as a method for saving t) and t when performing a barometric pressure test. When using the open line test method, one of which is C, in places where pipelines are installed in narrow places (open conduits and culverts) and the intervals between the conduits are narrow, radiation inspection can be performed on the normal line. Since it is impossible to place the generator close to the outside of the pipe, it is not possible to adopt the X-ray generator, and even when the pipe is not installed in a convenient location, the X-rays emitted from the - There is a problem of protecting workers from radiation bombs.

他方、超音波探傷試験方法の場合、第２図の様に管路１
，３の外周に斜角探触子５を設置し、超音波を溶接部に
直接当Ｃる０、５スキツプによる方法が望ましいが、管
路に使用される材料の板厚、溶接部の開先形状等により
、溶接部の溶接幅（端部１ａと３８の外径側距離）が大
ぎくなる］１、ｒは、０．５スキツプによる方法では探
触子５が管路１３の溶接ビート１Ｆ端部に当ることがあ
り、正常な位置での探傷が困デ１１になり、また管路の
内側より探傷することもテＩＩ　Ｌ、い場合が多いので
、第３図の如き１．５スキツプで探傷する方法が考えら
れる。On the other hand, in the case of the ultrasonic flaw detection test method, pipe line 1 is
It is preferable to use a 0.5 skip method in which an angle probe 5 is installed on the outer periphery of the pipe and the ultrasonic wave is applied directly to the welded part, but the Due to the shape of the tip, etc., the welding width of the welding part (distance on the outer diameter side between the ends 1a and 38) becomes large]1. 1.5 as shown in Figure 3. One possible method is to use a skip to detect flaws.

この場合、管路１側より探傷する時、管路１に当て金２
を固定する為の溶接部２ａが探触子５から０．５スキツ
プイ」近の位置にくると、この溶接部２ａの欠陥を探傷
することとなり、管路１，３の溶接部の欠陥を探傷でき
なくなる欠点を有している。In this case, when performing flaw detection from the pipe line 1 side, the pad 2 is placed on the pipe line 1.
When the welded part 2a for fixing the pipe is 0.5 inch away from the probe 5, defects in the welded part 2a will be detected, and defects in the welded parts of pipes 1 and 3 will be detected. It has the disadvantage that it cannot be used.

［発明の目的］ 本発明は、上記の如き問題点に鑑みなされた−らので、
その目的は、１．５スキツプ法による超音波探傷時に当
て金の溶接部を探Ｆ３ｉづるおそれの４ｊい管路連結装
置を提供することにある。[Object of the Invention] The present invention has been made in view of the above-mentioned problems.
The purpose is to provide a pipe connection device that is free from the risk of detecting the welded part of the pad during ultrasonic flaw detection using the 1.5-skip method.

１光明の概波］ 本ｇｉ明の管路連結装置は、当て金をはば環状で外周部
に軸方向に延ひる平坦部をもつものとし、この当て金−
Ｇ＋、１：ど　方の管路の溶接部から双方の管路の溶接
部ま（の−・１法愛を、管路連結後の検査に用いる超７
；４．波探傷試Ｍ）装置の探触子屈折角θ。1. Waves of light] The pipe connection device of the present invention has a ring-shaped stopper with a flat part extending in the axial direction on the outer periphery.
G+, 1: From the welded part of either pipe to the welded part of both pipes (-1), super 7 is used for inspection after connecting the pipes.
;4. Wave flaw detection test M) Refraction angle θ of the probe of the device.

及び筐・路板厚１との間で、ｕ〉２王・【旧）θの関係
に設定したしので、超音波の０．５スキツプの（１′７
厘を当て金を固定した溶接部Ｊ、りも？τ路端部側どじ
ｋものである。Since the relationship between u>2K and [old]θ is set between
The welded part J, which fixed the metal plate with the ring, is it limo? τ is the road end side.

１光明の実施例１ 以十、本発明の一実施例を第４し１、第１５図に基づい
−（具体的に説明する。な、１３、第１図乃至第３図の
従来の管路連結装置と同一部分は、同一符号をイζＪし
て説明は省略づる。1. Embodiment 1 of Komyo Hereinafter, an embodiment of the present invention will be described in detail based on FIGS. 1 and 15. The same parts as the connecting device are designated by the same reference numerals, and the description thereof will be omitted.

一方の管路１の端部内面には、他方の管路３との溶接部
４を裏１］らする様に、当て金１１が溶接部１ｉａによ
り固定されている。即ら、当で金１１は、第５図（ａｌ
ｌ＞に示′！１様に、円環状で、その外周面が中１１１
方向に延びるか平坦部１２を有するよう形成されている
。この当−Ｃ金１１にＪ３いて、管路１の端部１ａの先
端より平坦部１２の端部、即ら溶接部１１ａまで長さＵ
が、管路１．３の板厚下、超音波探傷試験゛装置の探触
子５の屈折角をθ°とした場合、１＞２−１−ｔａｎ（
７の関係になる様に形成されている。従って、当て金１
１と管路１との溶接部１１ａは、管路１，３の溶接部１
の中心Ｊ：すＵだけ離れた位置に配設される。A pad 11 is fixed to the inner surface of the end of one pipe line 1 by a welded part 1ia so that the welded part 4 with the other pipe line 3 is exposed on the back side. That is, the winning number 11 is as shown in Figure 5 (al
Shown in l>! 1, it is annular, and its outer circumferential surface is 111 in the middle.
It is formed so as to extend in the direction or to have a flat portion 12 . The length U from the tip of the end 1a of the conduit 1 to the end of the flat part 12, that is, the welded part 11a, is
However, when the refraction angle of the probe 5 of the ultrasonic flaw detection test device is θ° under the thickness of the pipe 1.3, 1>2-1-tan(
It is formed to have a relationship of 7. Therefore, bet 1
The welded portion 11a between the pipe line 1 and the pipe line 1 is the welded part 11a between the pipe line 1 and the pipe line 1.
The center J: is located at a distance of U.

この様に構成された本実施例の当−Ｃ金１１を用いて管
路１，３を溶接するには、次の様に行う。In order to weld the pipes 1 and 3 using the metal 11 of this embodiment constructed in this way, the following procedure is performed.

即ち、■場におい゛Ｃ管路１を製作し、この溶接リベき
端部１ａの内側に、管路１の端部１ａ先端からＵ　＞　
２−Ｔ’　−ｔａｎθの位置にで当て金１１を挿入覆る
と共に、管路１と当て金１１とを周囲約数箇所の位置で
第４図の様に点溶接或は全周溶接し、当て金１１と管路
１とをほぼ密着した構造とする１゜この管路１と当て金
１１と溶接した状態で現地に運び、現地で当て金１１に
他方の管路３の溶接すべき端部３ａを挿入させ両者を溶
接し、管路１゜３とを連結させる。That is, ①C pipe line 1 is manufactured in the field, and a U
2-T' -tanθ, insert and cover the pad 11, and spot-weld or weld the entire circumference of the conduit 1 and the pad 11 at approximately several positions around the circumference as shown in Fig. 4. 1゜The pipe 1 and the pipe 1 are welded together to form a structure in which the metal 11 and the pipe 1 are almost in close contact with each other.The pipe 1 and the pad 11 are welded together and transported to the site, and the end of the other pipe 3 to be welded is attached to the pad 11 at the site. 3a is inserted and welded together to connect the conduit 1°3.

この様にした本実施例の装置によれば、管路１゜３の溶
接部４を予め定めた屈折角θにより斜角超音波探山装胃
を用いて１．５スキツプ法で検査づる時、０．５スキツ
プの位置が溶接部１１よりも管路の端部側となるので、
超音波は溶接部１１ａに当ることなく管路１，３の溶接
部４に到達することかできるの−（、確実に管路１，３
の溶接部４がカス圧に耐えるかどうか検証し得るのであ
る。According to the apparatus of this embodiment, when the welded part 4 of the conduit 1.3 is inspected by the 1.5 skip method using the oblique ultrasonic probe at a predetermined refraction angle θ. , since the position of 0.5 skip is closer to the end of the pipe than the welded part 11,
Is it possible for the ultrasonic waves to reach the welds 4 of pipes 1 and 3 without hitting the welds 11a?
It can be verified whether the welded part 4 can withstand the gas pressure.

なｄ３、木５を明は第３図、第４図の実施例に限定され
るものでなく、第６図（ａ）に示す如く、当て金１１の
形状は双方の管路溶接部４の裏側位置に突設部１２が設
けられているものを用いれば、溶接部が充分シールドさ
れるのでより信頼性のある管路連結装置が得られる。ま
た、第６図（ｂ）の如く、当て金１１にお【プる双方の
管路溶接部の裏側位置に矩形状溝１３を設（ブたものを
用いることにより、溶接時に溶接１〜−チから吹出され
るシールド用不活用ガスの逃げ道かでき、溶接部に気泡
等の傷が残らない利点がある。The shape of the pad 11 is not limited to the embodiments shown in FIGS. 3 and 4, and as shown in FIG. If a device having a protrusion 12 provided on the back side is used, the welded portion will be sufficiently shielded and a more reliable pipe connection device will be obtained. In addition, as shown in FIG. 6(b), rectangular grooves 13 are provided on the back side of both pipe welding parts in the pad 11. This provides an escape route for the unused shielding gas blown out from the pipe, and has the advantage that no bubbles or other damage will be left on the welded part.

［発明の効宋１ 以トの通り、本発明によれば、当−（金の形状を超音波
の屈折角と管路の板Ｊνにより定めるだ（］の簡単な構
成で、超音波探傷に適した管路連結装置をｉｑることが
できる。[Effects of the Invention Song 1] As described above, according to the present invention, the shape of the gold is determined by the refraction angle of the ultrasonic wave and the plate Jν of the conduit () with a simple structure that can be used for ultrasonic flaw detection. A suitable conduit connection device can be installed.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の管路連結装置の一例を示づ部分断面図、
第２図及び第３図は、夫々第１図の管路連結部の溶接部
の超音波探傷試験方法の一例を示゛す部分断面図、第４
図は本発明のへ路辻結装置及びその溶接部の超音波探傷
試験方法の一すこ圧倒を承り断面図、第５図（ａ　）は
同実施例の当て金の正面図、第５図（ｂ）は第５図（ａ
）のＡ−Ａ線に沿って切断し、矢印方向に見た断面図、
￥５６図（ａ）は当て金に突起部を設けた本発明の他の
実施例を示す断面図、第６図（ｂ）は当て金に矩形状溝
を設けた本発明の他の実施例を示す断面図である。 １・・・管路、１ａ・・・端部、２・・・当て金、２ａ
・・・溶接部、３・・・管路、３ａ・・・端部、４・・
・溶接部、５・・・探触子、１１・・・当て金、１１ａ
・・・溶接部、１２・・・平坦部、１２・・・突設部、
１３・・・矩形状溝。 出願人　東京芝浦電気株式会社 第１図 第２図 竿　３　図 第４図 第５図 手続♀ｉｌｉ　ａＴｈＥ錫　〈自発） 昭和５１３年２月３日 特許庁長官殿 １、事イ′ｌの表示 昭和５７年特許願第２２７　／ｌ　９９号２、発明の名
称 管路連結装置 ３、補正づ゛る名 小（’ｌとの関係　１、°１品′１出Ｉｉイ）人東京芝
浦電気株式会社 ４、代理人 東ｈミ都港Ｉメ赤坂１−１−１７ ５、補１１ヨの対象 明細書中１−発明の詳細な説明］σ）　ｌ１ｉｌ１６、
補正の内容 （１）　明細内筒４頁第１５行の１被破壊検査方法Ｊを
「非破壊検査方法」と訂正する。 （２〉　明細ｍ第５頁第２行の「火爆」を１被爆１と訂
正する。 以　　」二 子糸ジｅンｉ１ｉ　ｉ：Ｆ　ｉす；　（自発）昭和５ε
３イ１．５１１１９１ヨ ｔｊｒ　Ｆ（庁罠官殿 １、事イ′１の表示 昭和５７　’ｌ’　Ｑ’ｓ訂願第２２７　’ｌ　９４）
シ〕２、発明の名称 ？で；路連結鼓；ｅ１ ３　、　　ン山　止　Ｊ　る　者 事１′１との関係　特許出願人 東京芝浦電気株式会“拐 １、代理人 中Ｓ：厚都港１２赤坂１−’ｌ−’Ｉ／、ｆｌ１１川ヒ
ル’Ｉ　Ｏ／１ ５、祁ｉ正のスｌτ１ 添イ１図而 ６．補正の内容 （１）　添イ１」図面中筒４図を別紙の通り訂正づる。 以　　」ニFIG. 1 is a partial sectional view showing an example of a conventional pipe connection device;
2 and 3 are a partial sectional view and a fourth sectional view respectively showing an example of an ultrasonic flaw detection test method for a welded part of a pipe connection shown in FIG. 1.
The figure is a cross-sectional view showing the method of ultrasonic flaw detection of the welded joint of the present invention and its welded part. b) is shown in Figure 5(a)
) is a cross-sectional view taken along line A-A and viewed in the direction of the arrow,
￥56 Figure (a) is a sectional view showing another embodiment of the present invention in which a protrusion is provided on the pad, and FIG. 6 (b) is another embodiment of the present invention in which the pad is provided with a rectangular groove. FIG. DESCRIPTION OF SYMBOLS 1...Pipeline, 1a...End part, 2...Batch, 2a
...Welded part, 3... Pipeline, 3a... End, 4...
・Welded part, 5... Probe, 11... Button, 11a
... welded part, 12... flat part, 12... protruding part,
13... Rectangular groove. Applicant: Tokyo Shibaura Electric Co., Ltd. Figure 1 Figure 2 Pole 3 Figure 4 Figure 5 Procedure 1957 Patent Application No. 227/l No. 99 2, Name of the invention Pipe connection device 3, Amended name and small name (Relationship with 'l) 1, °1 item'1 Exit IIi) Tokyo Shibaura Electric Co., Ltd. 4. Agent Higashi Hmi Miyako I Me Akasaka 1-1-17 5. Supplement 11 1-Detailed Description of the Invention in the Subject Specification] σ) l1il16,
Contents of the amendment (1) 1. Destructive testing method J on page 4, line 15 of the specification is corrected to "non-destructive testing method."(2> Correct “fire bomb” in the second line of page 5 of the specification to read “1 bombing” as 1 bombing.
3 I 1.511191 Yotjr F (Indication of Agency Trap Official Hall 1, Matter A'1 1982 'l'Q's Revision No. 227 'l 94)
2. Name of the invention? Relationship with Road Connecting Drum; e1 3, Nyama Stop J Ru Personnel 1'1 Patent Applicant Tokyo Shibaura Electric Co., Ltd. "Ki 1, Representative S: Atsuto Port 12 Akasaka 1-'l-' I/, fl11 Kawa Hill'I O/1 5, Qi Masa's thread lτ1 Attachment A1 Figure 6. Contents of the amendment (1) Attachment A1' Diagram 4 of the drawing is corrected as shown in the attached sheet. ” ni

Claims (3)

【特許請求の範囲】[Claims] （１）　端部にフランジを有していない管路を相互に連
結する装置であって、一方の管路の端部内面に当て金が
挿入され、この当て金の一端と前記管路内面とが溶接部
において固定され、この当て金の細端を他方の管路の端
部内面を挿入した状５屁で、双方の管路を突き合せ溶接
した管路連結装置にＪ５いて、 前記当て金をほぼ環状でその外周部を軸方向に延びる平
坦部としたものとし、この当て金の一端と一方の管路の
溶接部から双方の管路の溶接部までの寸法斐を、管路連
結後の検、査に用いる超音波探傷試験装置の探触子屈折
角θ°及び管路の板厚Ｔとの間で、０−　＞　２　Ｔ−
ｔａｎθの関係となる様に設定しＩｃことを特徴どする
管路連結装置。(1) A device for interconnecting pipes that do not have flanges at their ends, in which a pad is inserted into the inner surface of the end of one pipe, and one end of the pad is connected to the inner surface of the pipe. is fixed at the welded part, and the narrow end of this pad is inserted into the inner surface of the end of the other pipe, and the two pipes are butt-welded to a pipe connecting device J5, and the said pad is is approximately annular and its outer periphery is a flat part extending in the axial direction, and the dimension from one end of this padding to the welding part of one pipe to the welding part of both pipes after connecting the pipes is 0- > 2 T-
A pipe connection device characterized by being set to have a relationship of tan θ and Ic. （２）　当て金が、双方の管路溶接部の裏側位置に突起
部を設【ノ１Ｃものである特許請求の範囲第１項記載の
管路連結装置。(2) The conduit connecting device according to claim 1, wherein the pad has a protrusion provided on the back side of both conduit welded parts. （３）　当て金が、双方の管路溶接部の裏側位置に矩形
状の溝を設けたものである特許請求の範囲第１項記載の
管路連結装置。(3) The conduit connecting device according to claim 1, wherein the pad is provided with a rectangular groove on the back side of both conduit welded parts.