JP3210480B2 - Nuclear fuel rod upper end plug welding equipment - Google Patents

Nuclear fuel rod upper end plug welding equipment

Info

Publication number
JP3210480B2
JP3210480B2 JP09810793A JP9810793A JP3210480B2 JP 3210480 B2 JP3210480 B2 JP 3210480B2 JP 09810793 A JP09810793 A JP 09810793A JP 9810793 A JP9810793 A JP 9810793A JP 3210480 B2 JP3210480 B2 JP 3210480B2
Authority
JP
Japan
Prior art keywords
end plug
supply device
cladding tube
push rod
main welding
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 - Lifetime
Application number
JP09810793A
Other languages
Japanese (ja)
Other versions
JPH06308283A (en
Inventor
見 英 徳 花
丸 健 一 松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP09810793A priority Critical patent/JP3210480B2/en
Publication of JPH06308283A publication Critical patent/JPH06308283A/en
Application granted granted Critical
Publication of JP3210480B2 publication Critical patent/JP3210480B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Landscapes

  • Butt Welding And Welding Of Specific Article (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、核燃料製造工程におい
て、ペレット充填剤の被覆管内にプレナムスプリング及
び上部端栓を不活性ガス雰囲気で挿入した後、被覆管の
上端部に上部端栓を溶接するための上部端栓溶接装置に
関する。BACKGROUND OF THE INVENTION The present invention relates to a process for inserting a plenum spring and an upper end plug in an inert gas atmosphere into a cladding tube of a pellet filler in a nuclear fuel manufacturing process, and then welding the upper end plug to an upper end portion of the cladding tube. And an upper end plug welding apparatus for performing the above.

【０００２】[0002]

【従来の技術】一般に、原子炉に使用する核燃料棒は、
ジルコニウム合金またはステンレス鋼製の被覆管内に、
二酸化ウランなどのペレットが所定数装填され、その上
端部に装着された上部端栓と上記ペレットの間にプレナ
ムスプリングが介装されている。2. Description of the Related Art Generally, nuclear fuel rods used in nuclear reactors are:
In a cladding tube made of zirconium alloy or stainless steel,
A predetermined number of pellets such as uranium dioxide are loaded, and a plenum spring is interposed between the upper end plug attached to the upper end and the pellets.

【０００３】ところで、上述の如き核燃料棒の製造工程
においては、被覆管内部を不活性ガス雰囲気とする必要
があるため、ペレット充填剤の被覆管内を空気雰囲気か
ら不活性ガス雰囲気に置換した後、プレナムスプリング
及び端栓を被覆管に挿入し、その後端栓を溶接すること
が行なわれている。In the nuclear fuel rod manufacturing process as described above, since the inside of the cladding tube needs to be in an inert gas atmosphere, the inside of the cladding tube of the pellet filler is replaced with an inert gas atmosphere from an air atmosphere. A plenum spring and an end plug are inserted into a cladding tube, and then the end plug is welded.

【０００４】そこで、不活性ガス雰囲気で端栓を被覆管
に挿入するのに使用される端栓供給機構としては、従来
内部を気密室とする溶接チャンバ外で端栓を端栓押棒に
セットして、溶接チャンバに設けられたロッドシールと
上記端栓押棒が会合シールされながら被覆管内に供給・
圧入する方法、或はチャンバーを主チャンバーと副チャ
ンバーによって構成し、副チャンバー内に端栓及びプレ
ナムスプリングの保持・割出し機構を設け、順次端栓及
びプレナムスプリングを被覆管と同軸位置に移動させ
て、チャンバー外に設けられた押出し機構の駆動で、上
記端栓を被覆管に供給、圧入する方法が提案されてい
る。Therefore, as an end plug supply mechanism used to insert an end plug into a cladding tube in an inert gas atmosphere, a conventional end plug is set on an end plug push rod outside a welding chamber having an airtight chamber. The rod seal provided in the welding chamber and the end plug push rod are fed into the cladding tube while being associated and sealed.
Press-fitting method, or the chamber is composed of a main chamber and a sub-chamber, and an end plug and a plenum spring holding / indexing mechanism are provided in the sub-chamber, and the end plug and the plenum spring are sequentially moved to a coaxial position with the cladding tube. In addition, a method has been proposed in which the end plug is supplied to and press-fitted into the cladding tube by driving an extrusion mechanism provided outside the chamber.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら、前者の
ように端栓供給、圧入のための駆動力として、内部を気
密室となす溶接チャンバ外の空気雰囲気中に設けられた
駆動装置を使用し、この駆動装置に連結された端栓押棒
を溶接チャンバの壁面を貫通させた場合、摺動部である
ロッドシールに劣化が生じると溶接チャンバ内の不活性
ガス雰囲気中に空気が混入する等の問題がある。また、
後者では気密室である副チャンバ内に端栓の保持・割出
し機構を設置するので構造が複雑にある。However, as in the former case, a driving device provided in an air atmosphere outside a welding chamber forming an airtight chamber is used as a driving force for supplying and press-fitting an end plug. When the end plug push rod connected to this driving device penetrates the wall surface of the welding chamber, if the rod seal, which is a sliding portion, deteriorates, air may enter the inert gas atmosphere in the welding chamber. There is. Also,
In the latter case, the structure is complicated because an end plug holding / indexing mechanism is installed in the sub-chamber which is an airtight chamber.

【０００６】本発明はこのような点に鑑み、比較的簡単
な構造でしかも気密室内の不活性ガス雰囲気に空気が混
入してしまうことを極力防止できるようにした上部端栓
溶接装置を得ることを目的とする。SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide an upper end plug welding apparatus having a relatively simple structure and capable of preventing air from entering an inert gas atmosphere in an airtight chamber as much as possible. With the goal.

【０００７】[0007]

【課題を解決するための手段】本発明は、主溶接チャン
バ内に核燃料棒の被覆管の一端を気密的に挿入し、主溶
接チャンバ内を不活性ガス雰囲気に置換した後、上記被
覆管内にプレナムスプリングを挿入するとともに上部端
栓を圧入し、その上部端栓と被覆管との周溶接を行なう
上部端栓溶接装置において、上記主溶接チャンバに挿入
装着された被覆管の軸線と同一軸線上に選択的に移動可
能に主溶接チャンバに気密的に連結された上部端栓供給
装置と、その上部端栓供給装置の移動駆動機構と、上記
上部端栓供給装置内に軸線方向に摺動自在に収納され、
先端部分に軸線回りに回転可能に端栓保持部を装着した
端栓押棒と、上部端栓供給装置外に設けられた端栓押棒
駆動機構と、その端栓押棒駆動機構によって回転駆動す
るとともに上記上部端栓供給装置内に貫挿された回転シ
ャフトの回転運動を端栓押棒の軸線方向の移動に変換す
る伝動機構とを有することを特徴とする。According to the present invention, one end of a cladding tube of a nuclear fuel rod is hermetically inserted into a main welding chamber, and the inside of the main welding chamber is replaced with an inert gas atmosphere. In the upper end plug welding device for inserting the plenum spring and press-fitting the upper end plug and performing circumferential welding between the upper end plug and the cladding tube, the upper end plug is coaxial with the axis of the cladding tube inserted and mounted in the main welding chamber. An upper end plug supply device which is selectively movably airtightly connected to the main welding chamber, a movement driving mechanism of the upper end plug supply device, and an axially slidable inside the upper end plug supply device. Stored in
An end plug push rod having an end plug holding part rotatably mounted around the axis at the distal end portion, an end plug push rod drive mechanism provided outside the upper end plug supply device, and the end plug push rod drive mechanism is rotated and driven by the end plug push rod drive mechanism. And a transmission mechanism for converting the rotational movement of the rotary shaft inserted into the upper end plug supply device into the axial movement of the end plug push rod.

【０００８】[0008]

【作用】溶接チャンバに被覆管が挿入され、不活性ガス
雰囲気に置換されてプレナムスプリングが被覆管内に挿
入された後、移動駆動機構により上部端栓供給装置が上
記被覆管の軸線と同一軸線上に位置するように位置決め
し、端栓押棒駆動機構によって端栓押棒を伝動機構を介
して前進させ、上部端栓を溶接チャンバ内に挿入し、溶
接チャンバ内を不活性ガスで加圧し、再度端栓押棒駆動
機構で端栓押棒を前進させ、上部端栓を被覆管内に圧入
する。その後、被覆管を回転させながら上部端栓と被覆
管との周溶接を行なう。After the cladding tube is inserted into the welding chamber and replaced with an inert gas atmosphere and the plenum spring is inserted into the cladding tube, the upper end plug supply device is moved on the same axis as the cladding tube by the moving drive mechanism. The end plug push rod is advanced through the transmission mechanism by the end plug push rod drive mechanism, the upper end plug is inserted into the welding chamber, the inside of the welding chamber is pressurized with an inert gas, and the end plug is again positioned. The stopper push rod drive mechanism advances the stopper stopper rod, and presses the upper stopper into the cladding tube. Thereafter, circumferential welding of the upper end plug and the cladding tube is performed while rotating the cladding tube.

【０００９】しかして、この場合上部端栓供給装置には
回転シャフトが貫挿されているだけであるので、この部
分からの空気の混入は比較的少なく、当該部分にシール
機構を設けることによって不活性ガス雰囲気中への空気
の混入を確実に防止することができる。However, in this case, since only the rotary shaft is inserted through the upper end plug supply device, the air is relatively little mixed from this portion, and it is impossible to provide a seal mechanism in this portion. It is possible to reliably prevent air from being mixed into the active gas atmosphere.

【００１０】[0010]

【実施例】以下、添付図面を参照して本発明の実施例に
ついて説明する。図１について符号１は主溶接チャンバ
であって、その主溶接チャンバ１の一側壁部には、燃料
ペレット充填剤の被覆管２の上端部を挿入する被覆管挿
入部３が形成されており、その被覆管挿入部３には被覆
管保持部材４が回転可能に装着されている。上記被覆管
保持部材４には、その中心に被覆管２を挿通する挿入口
４ａが形成され、その挿入口４ａの内周部には上記被覆
管２の外周面と係合し気密を保持するシール部材５が装
着されている。また、上記主溶接チャンバ１内にはその
頂壁部から溶接装置６が突設され、さらに底壁部には真
空排気系と不活性ガス供給系（共に図示せず）に連結さ
れた給排気管７が接続されている。Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a main welding chamber, and a cladding tube insertion portion 3 for inserting an upper end portion of a cladding tube 2 of a fuel pellet filler is formed on one side wall of the main welding chamber 1. A cladding tube holding member 4 is rotatably mounted on the cladding tube insertion portion 3. An insertion port 4a for inserting the cladding tube 2 is formed at the center of the cladding tube holding member 4, and an inner peripheral portion of the insertion port 4a is engaged with an outer peripheral surface of the cladding tube 2 to maintain airtightness. The seal member 5 is mounted. In the main welding chamber 1, a welding device 6 is protruded from a top wall thereof, and a supply / exhaust connected to a vacuum exhaust system and an inert gas supply system (both not shown) is provided on the bottom wall. Tube 7 is connected.

【００１１】一方、上記主溶接チャンバ１の被覆管挿入
部３と対向する側壁外面には、プレナムスプリング供給
装置８及び上部端栓供給装置９が装着された副容器１０
の先端部が、ベロー１１を介して主溶接チャンバ１の開
口部１ａ外周に気密的に連結されている。On the other hand, a sub-container 10 having a plenum spring supply device 8 and an upper end plug supply device 9 mounted on the outer surface of the side wall of the main welding chamber 1 facing the cladding tube insertion portion 3.
Is hermetically connected to the outer periphery of the opening 1 a of the main welding chamber 1 via a bellows 11.

【００１２】上記プレナムスプリング供給装置８と上部
端栓供給装置９とは、互いに或角度をなしその先端開口
部が接近するように副容器１０に装着されており、上記
プレナムスプリング供給装置８と上部端栓供給装置９に
連結されている揺動駆動機構１２によって、プレナムス
プリング供給装置８と上部端栓供給装置９が選択的に主
溶接チャンバ１に挿入装着された被覆管２と同一軸線上
に位置するように揺動可能としてある。The plenum spring supply device 8 and the upper end plug supply device 9 are attached to the sub-container 10 at an angle to each other and the leading end openings thereof are close to each other. The plenum spring supply device 8 and the upper end plug supply device 9 are selectively co-axial with the cladding tube 2 inserted and mounted in the main welding chamber 1 by a swing drive mechanism 12 connected to the end plug supply device 9. It is swingable to be located.

【００１３】ところで、上記プレナムスプリング供給装
置８は、外部から供給されたプレナムスプリング１３を
収納するスプリング収納シース１４と、そのプレナムス
プリング１３をスプリング収納シース１４に供給するス
プリング供給口を気密的に密封する蓋体１５と、スプリ
ング収納シース１４内のプレナムスプリング１３を被覆
管２内に挿入するスプリング送出部１６と、そのスプリ
ング収納シース１４及びスプリング送出部１６を前後方
向に駆動するためのスプリン挿入機構１７から構成され
ている。The plenum spring supply device 8 hermetically seals a spring accommodating sheath 14 for accommodating a plenum spring 13 supplied from the outside and a spring supply port for supplying the plenum spring 13 to the spring accommodating sheath 14. Cover 15, a spring delivery portion 16 for inserting the plenum spring 13 in the spring storage sheath 14 into the cladding tube 2, and a spring insertion mechanism for driving the spring storage sheath 14 and the spring delivery portion 16 in the front-rear direction. 17.

【００１４】また、上部端栓供給装置９は上部端栓１８
を供給するための部材供給口１９ａが形成された端栓供
給容器１９を有し、その部材供給口１９ａにはその供給
口を気密的に密封する蓋体２０が設けられている。The upper end plug supply device 9 includes an upper end plug 18.
Has an end plug supply container 19 formed with a member supply port 19a for supplying the water, and the member supply port 19a is provided with a lid 20 for hermetically sealing the supply port.

【００１５】端栓供給容器１９内には、図２に示すよう
に、端栓押棒２１が回り止めキー２２によってその軸線
方向のみ移動可能に設けられており、その端栓押棒２１
の先端部には、上部端栓１８を把持する端栓保持部２３
が上記端栓押棒２１の軸線回りに回動可能に装着されて
いる。As shown in FIG. 2, an end plug push rod 21 is provided in the end plug supply container 19 by a detent key 22 so as to be movable only in its axial direction.
The end plug holding portion 23 for gripping the upper end plug 18
Is mounted so as to be rotatable around the axis of the end plug push rod 21.

【００１６】上記端栓供給容器１９の外端部には、筒状
部材２４が同軸的に連結されており、その筒状部材２４
内には円筒状のネジホルダー２５が配設されている。こ
のネジホルダー２５の一端内面には円筒シングルナット
２６が固着されており、この円筒シングルナット２６
に、前記端栓押棒２１の後端に装着されたボールネジ軸
２７が螺合せしめられている。A cylindrical member 24 is coaxially connected to the outer end of the end plug supply container 19.
Inside, a cylindrical screw holder 25 is provided. A cylindrical single nut 26 is fixed to the inner surface of one end of the screw holder 25.
A ball screw shaft 27 attached to the rear end of the end plug push rod 21 is screwed together.

【００１７】上記ネジホルダー２５の他端は先端にカッ
プリング２８を設けたシャフト２９に連結されており、
上記シャフト２９が貫通する筒状部材２４の端壁部には
磁性流体シール３０が設けられている。The other end of the screw holder 25 is connected to a shaft 29 having a coupling 28 at the tip.
A magnetic fluid seal 30 is provided on an end wall of the cylindrical member 24 through which the shaft 29 passes.

【００１８】一方、主溶接チャンバ１と副容器１０とを
連通する開口部１ａはスプリング収納シース１４と端栓
押棒２１を挿通し得る大きさに形成しており、その開口
部１ａの内周面には、端栓押棒２１が主溶接チャンバ１
内に挿入されたとき主溶接チャンバ１と副容器１０との
間で気密を保つための成型パッキンの如きシール機構３
１が設けられている。On the other hand, an opening 1a for communicating the main welding chamber 1 with the sub-container 10 is formed in a size that allows the spring storage sheath 14 and the end plug push rod 21 to be inserted therein, and an inner peripheral surface of the opening 1a. The end plug push rod 21 is attached to the main welding chamber 1.
A sealing mechanism 3 such as a molded packing for maintaining airtightness between the main welding chamber 1 and the sub-container 10 when inserted into the inside.
1 is provided.

【００１９】さらに、上部端栓供給装置９の外側方に
は、上記上部端栓供給装置９が揺動駆動機構１２によっ
て揺動され被覆管２と同一軸線上に位置決めされた時
に、シャフト２９の先端に設けられたカップリング２８
と係合するカップリング３２を有する端栓押棒駆動モー
タ３３が配設されている。Further, on the outer side of the upper end plug supply device 9, when the upper end plug supply device 9 is rocked by the rocking drive mechanism 12 and positioned on the same axis as the cladding tube 2, the shaft 29 has Coupling 28 provided at the tip
An end plug push rod drive motor 33 having a coupling 32 that engages with the end plug push rod drive motor 33 is provided.

【００２０】しかして、ペレット充填剤の被覆管に上部
端栓を装着する場合には、まずペレット充填剤の被覆管
２の端部が被覆管保持部材４に挿入保持させられる。そ
して、シール部材５と上記被覆管２の外周面との密着に
よって被覆管外周面の気密が保持される。When the upper end plug is to be attached to the pellet filler coating tube, first, the end of the pellet filler coating tube 2 is inserted and held in the coating tube holding member 4. The tightness between the sealing member 5 and the outer peripheral surface of the cladding tube 2 keeps the outer peripheral surface of the cladding tube airtight.

【００２１】そこで、プレナムスプリング供給装置８の
蓋体１５を開けてプレナムスプリング１３をスプリング
収納シース１４に収納し、上記蓋材１５を閉じるととも
に、部材供給口１９ａから上部端栓１８を端栓供給容器
１９内に収納した後、蓋体２０を閉じ、主溶接チャンバ
１、副容器１０、プレナムスプリング供給装置８及び端
栓供給装置９内が気密状態に保持される。Therefore, the lid 15 of the plenum spring supply device 8 is opened, the plenum spring 13 is stored in the spring storage sheath 14, the lid 15 is closed, and the upper end plug 18 is supplied from the member supply port 19a with the end plug. After being stored in the container 19, the lid 20 is closed, and the main welding chamber 1, the sub-container 10, the plenum spring supply device 8 and the end plug supply device 9 are kept in an airtight state.

【００２２】この状態で、給排気管７を介して主溶接チ
ャンバ１等の内部空気が真空排気された後、不活性ガス
が供給され、内部が不活性ガス雰囲気とされる。In this state, after the internal air of the main welding chamber 1 and the like is evacuated through the air supply / exhaust pipe 7, an inert gas is supplied, and the inside is made an inert gas atmosphere.

【００２３】次に、揺動駆動機構１２が作動され、プレ
ナムスプリング供給装置８が被覆管２と同一軸線上にな
る位置に位置決めされ、スプリング挿入機構１７によっ
てスプリング収納シース１４が前進され、プレナムスプ
リング１３が被覆管２の直近まで運ばれ、その後スプリ
グ送出部１６の前進によって上記プレナムスプリング１
３が被覆管２内に挿入される。このようにしてプレナム
スプリング１３が被覆管２内に挿入されたら、スプリン
グ送出部１６とスプリング収納シース１４が後退させら
れる。Next, the swing drive mechanism 12 is operated, the plenum spring supply device 8 is positioned at a position on the same axis as the cladding tube 2, and the spring accommodating sheath 14 is advanced by the spring insertion mechanism 17, whereby the plenum spring is moved. 13 is carried to the vicinity of the cladding tube 2, and then the plenum spring 1 is advanced by the advance of the sprig delivery section 16.
3 is inserted into the cladding tube 2. When the plenum spring 13 is inserted into the cladding tube 2 in this manner, the spring delivery section 16 and the spring storage sheath 14 are retracted.

【００２４】そこで、揺動駆動機構１２によって上部端
栓供給装置９が被覆管２と同一軸線上になるように位置
決めされ、端栓押棒駆動モータ３３のカップリング３２
に上記端栓供給装置９におけるシャフト２９先端のカッ
プリング２８が係合される。Therefore, the upper end plug supply device 9 is positioned by the swing drive mechanism 12 so as to be on the same axis as the cladding tube 2, and the coupling 32 of the end plug push rod drive motor 33 is provided.
The coupling 28 at the tip of the shaft 29 in the end plug supply device 9 is engaged with the end plug supply device 9.

【００２５】その後、上記端栓押棒駆動モータ３３が駆
動されると、カップリング３２，２８を介してシャフト
２９が回転駆動され、それに連動してネジホルダー２５
及び円筒シングルナット２６が回転し、これによって上
記円筒シングルナット２６に噛合しているボールネジ軸
２７が前進し、端栓押棒２１が主溶接チャンバ１内に挿
入される。Thereafter, when the end plug push rod drive motor 33 is driven, the shaft 29 is rotationally driven via the couplings 32 and 28, and in conjunction therewith, the screw holder 25 is driven.
Then, the cylindrical single nut 26 rotates, whereby the ball screw shaft 27 meshing with the cylindrical single nut 26 advances, and the end plug push rod 21 is inserted into the main welding chamber 1.

【００２６】このようにして端栓押棒２１が主溶接チャ
ンバ１内の所定位置まで挿入されると、主溶接チャンバ
１の開口部１ａの内周面に設けられたシール機構３１と
端栓押棒２１の外周面とによって主溶接チャンバ１内と
副容器１０内とが気密的に隔離される。そこで、端栓押
棒駆動モータ３３が一旦停止された後、給排気管７から
不活性ガスが供給され、主溶接チャンバ１内が所定の圧
力まで加圧され、それによって被覆管２内と同一圧力に
加圧される。この場合副容器１０内は前述のように主溶
接チャンバ１と隔離されているので加圧されることはな
い。When the end plug push rod 21 is inserted to a predetermined position in the main welding chamber 1 in this manner, the seal mechanism 31 provided on the inner peripheral surface of the opening 1a of the main welding chamber 1 and the end plug push rod 21 The inside of the main welding chamber 1 and the inside of the sub-container 10 are hermetically isolated from each other by the outer peripheral surface. Then, after the end plug push rod drive motor 33 is temporarily stopped, an inert gas is supplied from the supply / exhaust pipe 7 and the inside of the main welding chamber 1 is pressurized to a predetermined pressure, whereby the same pressure as in the cladding pipe 2 is obtained. Pressurized. In this case, since the inside of the sub-container 10 is isolated from the main welding chamber 1 as described above, there is no pressurization.

【００２７】その後、圧入駆動モータ３３が再度回転さ
れ、端栓押棒２１が前進され、上部端栓１８が被覆管２
に圧入され、次いで図示しない被覆管回転装置によって
被覆管２を回転しつつ溶接装置６により上部端栓１８と
被覆管２との溶接が行なわれる。この場合、上部端栓１
８は端栓保持部２３により回転自在に保持されているの
で、被覆管２の回転と連動して回転する。Thereafter, the press-in drive motor 33 is rotated again, the end plug push rod 21 is advanced, and the upper end plug 18 is
Then, the cladding tube 2 is welded by the welding device 6 while the cladding tube 2 is rotated by a cladding tube rotating device (not shown). In this case, the upper end plug 1
8 is rotatably held by the end plug holding portion 23, and thus rotates in conjunction with the rotation of the cladding tube 2.

【００２８】このようにはて溶接が完了すると、給排気
管７から主溶接チャンバ１内の加圧状態の不活性ガスが
排出され、被覆管２を主溶接チャンバ１から抜き取るこ
とによって溶接作業が完了する。When the welding is completed in this manner, the pressurized inert gas in the main welding chamber 1 is discharged from the supply / exhaust pipe 7 and the cladding pipe 2 is extracted from the main welding chamber 1 to perform the welding operation. Complete.

【００２９】なお、上記実施例では上部端栓供給装置と
圧入駆動部とを分割して設け、上部端栓供給装置が被覆
管と同一軸線上に位置決めされた時に結合させるように
したものを示したが、圧入駆動部を上部端栓供給装置と
一体として上部端栓供給装置とともに移動させるように
してもよい。In the above embodiment, the upper end plug supply device and the press-fitting drive section are provided separately, and are connected when the upper end plug supply device is positioned on the same axis as the cladding tube. However, the press-fitting drive unit may be moved integrally with the upper end plug supply device together with the upper end plug supply device.

【００３０】[0030]

【発明の効果】以上説明したように、本発明は、主溶接
チャンバに挿入装着された被覆管の軸線と同一軸線上に
選択的に移動可能に主溶接チャンバに気密的に連結され
た上部端栓供給装置と、その上部端栓供給装置の移動駆
動機構と、上部端栓供給装置内に軸線方向に摺動自在に
収納され、先端部分に軸線回りに回転可能に端栓保持部
を装着した端栓押棒と、上部端栓供給装置外に設けられ
た端栓押棒駆動機構と、その端栓押棒駆動機構によっ回
転駆動されるとともに上記上部端栓供給溶機内に貫挿さ
れた回転シャフトの回転運動を端栓押棒の軸線方向の移
動に変換する伝動機構とを設けたので、端栓押棒を駆動
する回転シャフトが上部端栓供給装置における端壁を貫
通する部分においてシールすることができ、比較的容易
にシールが可能で主溶接チャンバ内の気密を保つことが
できる。また、スプリング供給装置と上部端栓供給装置
とを各々専用の機構とし、その位置決め機構も主溶接チ
ャンバ等の外部に設けることができ、構造が簡素化さ
れ、信頼性を向上させることができる。しかも、主溶接
チャンバと上部端栓供給装置が装着された副容器との連
設部に端栓押棒との間のシール装置を設けることによっ
て、さらに溶接中の主溶接チャンバ内の不活性ガス雰囲
気中に空気が混入してしまうようなことを防止すること
ができる。As described above, the present invention provides an upper end airtightly connected to a main welding chamber so as to be selectively movable on the same axis as the axis of a cladding tube inserted and mounted in the main welding chamber. A stopper supply device, a movement drive mechanism of the upper end stopper supply device, and an axial stopper slidably housed in the upper end stopper supply device, and an end stopper holding portion mounted on the distal end portion so as to be rotatable around the axis. An end plug push rod, an end plug push rod drive mechanism provided outside the upper end plug feeder, and a rotary shaft that is driven to rotate by the end plug push rod drive mechanism and inserted through the upper end plug supply melter. Since a transmission mechanism for converting the rotational movement into the axial movement of the end plug push rod is provided, the rotating shaft driving the end plug push rod can be sealed at a portion penetrating the end wall in the upper end plug supply device, Can be sealed relatively easily It is possible to maintain the airtightness of the welding chamber. In addition, the spring supply device and the upper end plug supply device are provided as dedicated mechanisms, respectively, and the positioning mechanism can be provided outside the main welding chamber or the like, so that the structure is simplified and the reliability can be improved. In addition, by providing a sealing device between the end plug push rod and a connecting portion between the main welding chamber and the sub-container on which the upper end plug supply device is mounted, the inert gas atmosphere in the main welding chamber during welding is further provided. It is possible to prevent air from being mixed therein.

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

【図１】本発明の上部端栓溶接装置の一実施例を示す断
面図。FIG. 1 is a sectional view showing an embodiment of an upper end plug welding apparatus according to the present invention.

【図２】上部端栓供給装置部の拡大断面図。FIG. 2 is an enlarged sectional view of an upper end plug supply device.

【符号の説明】[Explanation of symbols]

１ 主溶接チャンバ ２ 被覆管 ４ 被覆管保持部材 ５ シール部材 ６ 溶接装置 ７ 給排気管 ８ プレナムスプリング供給装置 ９ 上部端栓供給装置 １０ 副容器 １１ ベロー １２ 揺動駆動機構 １３ プレナムスプリング １４ スプリング収納シース １８ 上部端栓 １９ 端栓供給容器 ２１ 端栓押棒 ２３ 端栓保持部 ２５ ネジホルダー ２６ 円筒シングルナット ２７ ボールネジ軸 ２８，３２ カップリング ２９ シャフト ３０ 磁性流体シール ３１ シール機構 ３３ 端栓押棒駆動モータ DESCRIPTION OF SYMBOLS 1 Main welding chamber 2 Cladding pipe 4 Cladding pipe holding member 5 Seal member 6 Welding device 7 Supply / exhaust pipe 8 Plenum spring supply device 9 Upper end plug supply device 10 Subcontainer 11 Bellow 12 Swing drive mechanism 13 Plenum spring 14 Spring storage sheath Reference Signs List 18 upper end plug 19 end plug supply container 21 end plug push rod 23 end plug holding part 25 screw holder 26 cylindrical single nut 27 ball screw shaft 28, 32 coupling 29 shaft 30 magnetic fluid seal 31 seal mechanism 33 end plug push rod drive motor

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G21C 21/02 G21C 3/10 B23K 9/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. 7 , DB name) G21C 21/02 G21C 3/10 B23K 9/00

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】主溶接チャンバ内に核燃料棒の被覆管の一
端を気密的に挿入装着し、主溶接チャンバ内を不活性ガ
ス雰囲気に置換した後、上記被覆管内にプレナムスプリ
ングを挿入するとともに上部端栓を圧入し、その上部端
栓と被覆管との主溶接を行なう上部端栓溶接装置におい
て、上記主溶接チャンバに気密的に連結され、上記主溶
接チャンバに挿入装着された被覆管の軸線と同一軸線上
に選択的に移動可能な上部端栓供給装置及びプレナムス
プリング供給装置と、上記上部端栓供給装置及びプレナ
ムスプリング供給装置を選択的に主溶接チャンバに挿入
装着された被覆管の軸線と同一軸線上に移動させる移動
駆動機構と、上記上部端栓供給装置内に軸線方向に摺動
自在に収納され、先端部分に軸線回りに回転可能に端栓
保持部を装着した端栓押棒と、上部端栓供給装置外に設
けられた端栓押棒駆動機構と、その端栓押棒駆動機構に
よって回転駆動されるとともに上記上部端栓供給装置内
に貫挿された回転シャフトの回転運動を端栓押棒の軸線
方向の移動に変換する伝動機構とを有することを特徴と
する、核燃料棒の上部端栓溶接装置。1. A cladding tube for a nuclear fuel rod is inserted and hermetically inserted into a main welding chamber, and the inside of the main welding chamber is replaced with an inert gas atmosphere. In an upper end plug welding apparatus for press-fitting an end plug and performing main welding between the upper end plug and a cladding tube, the upper end plug is hermetically connected to the main welding chamber, and
On the same axis as the axis of the cladding tube inserted and mounted in the contact chamber
End plug supply device and plenum that can be selectively moved
A pulling supply device, the upper end plug supply device, and a planer.
Musspring feeder selectively inserted into main welding chamber
A moving drive mechanism for moving the coaxial tube on the same axis as the mounted cladding tube; and an end plug holding portion rotatably housed in the upper end plug supply device in the axial direction so as to be rotatable around the axis at the distal end portion. , An end plug push rod driving mechanism provided outside the upper end plug supply device, and a rotation driven by the end plug push rod drive mechanism and inserted through the upper end plug supply device. A power transmission mechanism for converting a rotational movement of the shaft into an axial movement of the end plug push rod, the upper end plug welding apparatus for a nuclear fuel rod.
JP09810793A 1993-04-23 1993-04-23 Nuclear fuel rod upper end plug welding equipment Expired - Lifetime JP3210480B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP09810793A JP3210480B2 (en) 1993-04-23 1993-04-23 Nuclear fuel rod upper end plug welding equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP09810793A JP3210480B2 (en) 1993-04-23 1993-04-23 Nuclear fuel rod upper end plug welding equipment

Publications (2)

Publication Number Publication Date
JPH06308283A JPH06308283A (en) 1994-11-04
JP3210480B2 true JP3210480B2 (en) 2001-09-17

Family

ID=14211109

Family Applications (1)

Application Number Title Priority Date Filing Date
JP09810793A Expired - Lifetime JP3210480B2 (en) 1993-04-23 1993-04-23 Nuclear fuel rod upper end plug welding equipment

Country Status (1)

Country Link
JP (1) JP3210480B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104722894B (en) * 2013-12-18 2017-01-25 中核建中核燃料元件有限公司 Nuclear rod multifunctional full automatic TIG welding device
CN111331228A (en) * 2018-12-18 2020-06-26 中核建中核燃料元件有限公司 Synchronous rotating device of nuclear fuel rod end plug ring welding machine
CN112242206B (en) * 2020-09-10 2023-10-31 中广核研究院有限公司 Support connecting device and tubular connecting furnace

Also Published As

Publication number Publication date
JPH06308283A (en) 1994-11-04

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