JP2004361265A - Method of making connecting pipe for plant - Google Patents

Method of making connecting pipe for plant Download PDF

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Publication number
JP2004361265A
JP2004361265A JP2003160561A JP2003160561A JP2004361265A JP 2004361265 A JP2004361265 A JP 2004361265A JP 2003160561 A JP2003160561 A JP 2003160561A JP 2003160561 A JP2003160561 A JP 2003160561A JP 2004361265 A JP2004361265 A JP 2004361265A
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Japan
Prior art keywords
flange
pipe
connection
relative positional
equipment
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JP2003160561A
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Japanese (ja)
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JP4114550B2 (en
Inventor
Hiroshi Sadaki
啓 定木
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IHI Corp
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IHI Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To dispense with complicated work such as blocking in a treating section to enhance efficiency, to dispense with a large scale of storage facility for storing a large jig and management therefor, and to reduce a radioactive waste. <P>SOLUTION: A relative positional relation between an equipment tie-up position O and a fixed piping flange tie-up position F is acquired preliminarily as a coordinate data by three-dimensional photographic measurement using a digital camera 27 when constructing a plant, a relative positional relation between a piping flange 7B provided in a new fusion furnace 2B and a position corresponding to the fusion furnace 2B with respect to the equipment tie-up position O is measured outside the treating section 1 when replacing a fusion furnace 2A after starting up an operation of the plant, a relative positional relation between the piping flange 7B of the fusion furnace 2B and a fixed piping flange 5 is found based on the relative positional relation and the coordinate data, and a connecting pipe 4B is formed based on the relative positional relation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、プラントの連結管製作方法に関するものである。
【0002】
【従来の技術】
図7は従来の連結管製作方法の一例の手順を示すもので、当該手順は、運転を開始する前(工事途中)の高レベル放射性廃液を取り扱うプラントを対象としている。
【0003】
このプラントは、気密構造の処理区画(高放射線区域)1と、該処理区画1の内部に設置され且つ使用済み燃料の再処理等に付随して発生する放射性廃液のガラス固化処理を行なうための機器としての溶融炉2Aを備え、処理区画1の側壁部分を貫通する配管3の端部と溶融炉2Aの上部を、連結管4Aを介して接続している。
【0004】
連結管4Aは、配管3の固定配管フランジ5に締結すべき第一の接続用フランジ6Aと、溶融炉2Aの配管フランジ7Aに締結すべき第二の接続用フランジ8Aと、これらの接続用フランジ6A,8A間に介在する配管9Aとで構成される。
【0005】
連結管4Aの製作には、型取り治具10Aと型写し治具11Aを用いる。
【0006】
型取り治具10Aは、図8に示すように、配管3側の固定配管フランジ5に締結可能なフランジ12A、溶融炉2A側の配管フランジ7Aに締結可能なフランジ13A、両フランジ12A,13A間に介在する連結部材14A,15A、フランジ12Aに連結部材14Aの一端部を枢着する球面継手16A、フランジ13Aに連結部材15Aの一端部を枢着する球面継手17A、前記連結部材14A,15Aの他端部を相互に枢着する球面継手18A、各球面継手16A,17A,18Aの動きを固定する拘束手段(図示せず)によって構成されている。
【0007】
型写し治具11Aは、架台19Aに固定され且つ型取り治具10Aのフランジ12Aが締結可能なフランジ20A、架台19Aに対して位置調整できるように支持され且つ型取り治具10Aのフランジ13Aが締結可能なフランジ21Aによって構成されている。
【0008】
連結管4Aを製作する際には、型取り治具10Aのフランジ12Aを配管3側の固定配管フランジ5に締結した後、各球面継手16A,17A,18Aによりフランジ12A、連結部材14A,15A、フランジ13Aの相対位置を適宜調整して、該フランジ13Aを溶融炉2A側の配管フランジ7Aに締結する。
【0009】
次いで、拘束手段により各球面継手16A,17A,18Aの動きを固定し、フランジ5,7Aとフランジ12A,13Aとの締結を解除する。
【0010】
プラント運転開始前は、処理区画1内部の雰囲気が大気中と同様であるので、配管3と溶融炉2Aに対する型取り治具10Aの着脱は、作業者が処理区画1に立ち入って行なうことができる。
【0011】
更に、型取り治具10Aを処理区画1外部へ搬出し、フランジ12Aを型写し治具11Aのフランジ20Aに締結した後、フランジ21Aの位置と姿勢を適宜調整して、該フランジ21Aを型取り治具10Aのフランジ13Aに締結する。
【0012】
次いで、フランジ21Aを架台19Aに固定して、フランジ20A,21Aとフランジ12A,13Aとの締結を解除する。
【0013】
これにより、フランジ5,7Aの相対位置関係が、フランジ20A,21Aに再現されることになる。
【0014】
そして、接続用フランジ6A,8Aを、型写し治具11Aのフランジ20A,21Aに締結した後、一端部が接続用フランジ6Aに正対し且つ他端部が接続用フランジ8Aに正対する形状に加工した配管9Aの各端部に接続用フランジ6A,8Aを固着することにより、連結管4Aを形成させる。
【0015】
この後、フランジ20A,21Aに対する接続用フランジ6A,8Aとの締結を解除して、連結管4Aを処理区画1内部へ搬入し、接続用フランジ6A,8Aをフランジ5,7Aに締結することにより、配管3及び溶融炉2Aを連結管4Aで接続する。
【0016】
型取り治具10A、型写し治具11Aの少なくとも一方は、前述の状態を保持したままで保管し、プラント運転開始後に連結管4Aを交換する必要が生じた際に、治具10A,11Aを用いて連結管4Aを新製できるようにしておく。
【0017】
なお、プラント運転開始後は、処理区画1内部の放射線レベルが高くなって、作業者が立ち入ることができなくなるので、これ以後の連結管4Aの交換作業は、処理区画1に設けたロボットのマニピュレータ22を用いて行なうことになる。
【0018】
図9は従来の連結管製作方法の他の例の手順を示すもので、当該手順は、運転を開始した後の高レベル放射性廃液を取り扱うプラントを対象としており、図中、図7と同一の符号を付した部分は同一物を表わしている。
【0019】
プラント運転開始後、連結管4A(図7参照)を交換する際には、先に述べたように、治具10A,11Aにより連結管4Aを新製することになるが、溶融炉2A(図7参照)を新しい溶融炉2Bに置き換える場合には、既設の固定配管フランジ5と溶融炉2Bの配管フランジ7Bの相対的な位置関係が、固定配管フランジ5と溶融炉2Aの配管フランジ7Aの相対的な位置関係と相違し、連結管4Aによって配管3と溶融炉2Aとを接続することができなくなる。
【0020】
そこで、固定配管フランジ5及び配管フランジ7Bの位置関係を新たに把握して、配管3と溶融炉2Bの配管フランジ7Bとを接続するための連結管4Bを製作することになる。
【0021】
連結管4Bは、配管3の固定配管フランジ5に締結すべき第一の接続用フランジ6Bと、溶融炉2Bの配管フランジ7Bに締結すべき第二の接続用フランジ8Bと、これらの接続用フランジ6B,8B間に介在する配管9Bとで構成される。
【0022】
連結管4Bの製作には、治具10A,11Aとは別途に、型取り治具10Bと型写し治具11Bを用いる。
【0023】
型取り治具10Bは、固定配管フランジ5に締結可能なフランジ12B、配管フランジ7Bに締結可能なフランジ13B、連結部材、球面継手、拘束手段によって、型取り治具10Aと同様に構成されている。
【0024】
型写し治具11Bは、架台19B、フランジ20B,21Bによって、型写し治具11Aと同様に構成されている。
【0025】
連結管4Bを製作する際には、型取り治具10Aのフランジ12Aを配管3側の固定配管フランジ5に締結した後、図8に示した各球面継手16A,17A,18Aによりフランジ12A、連結部材14A,15A、フランジ13Aの相対位置を適宜調整して、該フランジ13Aを溶融炉2B側の配管フランジ7Bに締結する。
【0026】
次いで、拘束手段により各球面継手16A,17A,18Aの動きを固定し、フランジ5,7Bとフランジ12A,13Aとの締結を解除する。
【0027】
型取り治具10Aの着脱は、処理区画1内部の放射線レベルが高く、作業者が立ち入ることができないので、ロボットのマニピュレータ22を処理区画1外部から遠隔操作して行なう。
【0028】
更に、型取り治具10Aを除染区画へ搬入して、放射線量を確認し、且つ必要に応じて除染を行なった後、機器補修室25へ移送する。
【0029】
ここで、フランジ12Aを型写し治具11Aのフランジ20Aに締結した後、フランジ21Aの位置と姿勢を適宜調整して、該フランジ21Aを型取り治具10Aのフランジ13Aに締結する。
【0030】
次いで、フランジ21Aを架台19Aに固定して、フランジ20A,21Aとフランジ12A,13Aとの締結を解除する。
【0031】
これにより、フランジ5,7Bの相対位置関係が、フランジ20A,21Aに再現されることになる。
【0032】
型取り治具10Aの着脱は、作業者24が行なう。
【0033】
この後、型取り治具10Bのフランジ12Bを、型写し治具11Aのフランジ20Aに締結して、フランジ12B,13Bの相対位置を調整し、フランジ13Bを、型写し治具11Aのフランジ21Aに締結する。
【0034】
次いで、拘束手段により各球面継手の動きを固定し、フランジ20A,21Aとフランジ12B,13Bとの締結を解除する。
【0035】
型取り治具10Bの着脱は、作業者26が行なう。
【0036】
更に、型取り治具10Bを機器補修室25外部へ搬出して、フランジ12Bを型写し治具11Bのフランジ20Bに締結した後、フランジ21Bの位置と姿勢を適宜調整し、該フランジ21Bを型取り治具10Bのフランジ13Bに締結する。
【0037】
次いで、フランジ21Bを架台19Bに固定して、フランジ20B,21Bとフランジ12B,13Bとの締結を解除する。
【0038】
これにより、フランジ5,7Bの相対位置関係が、フランジ20B,21Bに再現されることになる。
【0039】
そして、接続用フランジ6B,8Bを、型写し治具11Bのフランジ20B,21Bに締結した後、一端部が接続用フランジ6Bに正対し且つ他端部が接続用フランジ8Bに正対する形状に加工した配管9Bの各端部に接続用フランジ6B,8Bを固着することにより、連結管4Bを形成させる。
【0040】
この後、フランジ20B,21Bに対する接続用フランジ6B,8Bとの締結を解除して、連結管4Bを処理区画1内部へ搬入し、マニピュレータ22を用いて接続用フランジ6B,8Bをフランジ5,7Bに締結し、配管3及び溶融炉2Bを連結管4Bで接続する。
【0041】
型写し治具11Bは、前述の状態を保持したままで保管し、連結管4Bを交換する必要が生じた際に、連結管4Bを新製できるようにしておく。
【0042】
尚、前述の如き連結管製作方法を示すものとしては、例えば、先行出願1がある。
【0043】
【先行出願1】
特願2002−141669号明細書
【0044】
【発明が解決しようとする課題】
しかしながら、図9に示されるような手順で連結管4Bを新製するのでは、処理区画1内での型取り治具10Aのフランジ12A,13Aの位置設定に、高度なマニピュレータ22の操作技術を必要とする一方、機器補修室25等の放射線管理区域では、立入時間が制限されるため、効率的な作業を行なうことができなかった。
【0045】
又、型写し治具11Bを保管するために、大規模な保管施設が必要になると共に、その管理も行わなければならなくなるという問題を有していた。
【0046】
更に又、放射線レベルが高い雰囲気中で使用された型取り治具10A,10Bや型写し治具11Aは、放射性廃棄物として取り扱わなければならず、結果的に、放射性廃棄物が増えることになる。
【0047】
本発明は、斯かる実情に鑑み、処理区画内での型取り等の複雑な作業を不要とし得、効率向上を図り得ると共に、大掛かりな治具を保管するための大規模な保管施設やその管理を不要とし得、更に、放射性廃棄物の削減にもつながるプラントの連結管製作方法を提供しようとするものである。
【0048】
【課題を解決するための手段】
本発明は、処理区画内の不変の機器取合位置に機器を設置し、処理区画内の不変の固定配管フランジ取合位置に配設される固定配管フランジに対し、機器の所要箇所に設けられた配管フランジを、配管の両端部に接続用フランジが設けられた連結管を介して接続するようにしたプラントの連結管製作方法であって、
プラント建設時に予め、機器取合位置と固定配管フランジ取合位置との相対的位置関係を、三次元計測により座標データとして取得しておき、
プラント運転開始後における機器交換時、新設機器に設けられる配管フランジと、該新設機器の機器取合位置に対応する位置との相対的位置関係を処理区画外で計測し、該処理区画外で計測された相対的位置関係並びに前記座標データに基づき、新設機器の配管フランジと固定配管フランジとの相対的位置関係を求め、
該相対的位置関係に基づき、固定配管フランジに締結すべき第一の接続用フランジ及び新設機器の配管フランジに締結すべき第二の接続用フランジを保持し、これらの接続用フランジの間に介在すべき配管を、その一端部が第一の接続用フランジに正対し且つ他端部が第二の接続用フランジに正対する形状に加工した上、配管の各端部に接続用フランジを固着して連結管を形成することを特徴とするプラントの連結管製作方法にかかるものである。
【0049】
上記手段によれば、以下のような作用が得られる。
【0050】
プラント建設時には予め、機器取合位置と固定配管フランジ取合位置との相対的位置関係が、三次元計測により座標データとして取得されており、プラント運転開始後における機器交換時には、新設機器に設けられる配管フランジと、該新設機器の機器取合位置に対応する位置との相対的位置関係が処理区画外で計測され、該処理区画外で計測された相対的位置関係並びに前記座標データに基づき、新設機器の配管フランジと固定配管フランジとの相対的位置関係が求められ、該相対的位置関係に基づき、固定配管フランジに締結すべき第一の接続用フランジ及び新設機器の配管フランジに締結すべき第二の接続用フランジが保持され、これらの接続用フランジの間に介在すべき配管が、その一端部が第一の接続用フランジに正対し且つ他端部が第二の接続用フランジに正対する形状に加工された上で、配管の各端部に接続用フランジが固着されて連結管が形成される。
【0051】
この結果、従来のような型取り治具や型写し治具を用いた複雑な作業を処理区画内で行わなくて済み、処理区画内での高度なマニピュレータの操作技術等が不要となり、効率良く作業を進めることが可能となる。
【0052】
又、三次元計測により取得された座標データを記録しておくだけで、型写し治具等を保管する必要もなく、大規模な保管施設が不要になると共に、その管理も行わなくて済む。
【0053】
更に又、処理区画内部の雰囲気が放射線レベルの高い雰囲気であるとしても、従来のように型取り治具や型写し治具を処理区画の中で使用しなくて済むため、放射性廃棄物が減ることになる。
【0054】
前記プラントの連結管製作方法においては、三次元計測として三次元写真計測を用いることができる。
【0055】
前記プラントの連結管製作方法において、三次元計測として三次元写真計測を用いるようにした場合、処理区画内の所要箇所に、計測用ターゲットを貼り付けると共に、寸法の基準となるスケールと、計測座標系の基準となるオリエントバーとを配置してデジタルカメラにより撮影を行い、該デジタルカメラで得た画像データから計測用ターゲットの個々の座標を算出することができる。
【0056】
【発明の実施の形態】
以下、本発明の実施の形態を図示例と共に説明する。
【0057】
図1は本発明を実施する形態の一例であって、図中、図と同一の符号を付した部分は同一物を表わしており、本図示例においては、プラント建設時に予め、機器取合位置Oと固定配管フランジ取合位置Fとの相対的位置関係を、デジタルカメラ27とパソコン28を用いた三次元写真計測により座標データとして取得しておき、
プラント運転開始後における機器としての溶融炉2A交換時、新設機器としての溶融炉2Bに設けられる配管フランジ7Bと、該溶融炉2Bの機器取合位置Oに対応する位置との相対的位置関係を処理区画1外で計測し、該処理区画1外で計測された相対的位置関係並びに前記座標データに基づき、溶融炉2Bの配管フランジ7Bと固定配管フランジ5との相対的位置関係を求め、
該相対的位置関係に基づき、その位置関係が型写し治具11Aの両フランジ20A,21Aに再現されるように、フランジ21Aの位置と姿勢を適宜調整し、固定配管フランジ5に締結すべき第一の接続用フランジ6B及び溶融炉2Bの配管フランジ7Bに締結すべき第二の接続用フランジ8Bを、型写し治具11Aのフランジ20A,21Aに締結して保持し、これらの接続用フランジ6B,8Bの間に介在すべき配管9Bを、その一端部が第一の接続用フランジ6Bに正対し且つ他端部が第二の接続用フランジ8Bに正対する形状に加工した上、配管9Bの各端部に接続用フランジ6B,8Bを固着して連結管4Bを形成し、
この後、前記溶融炉2Bを処理区画1内部へ搬入し、機器取合位置Oに合わせて固定設置する一方、前記型写し治具11Aのフランジ20A,21Aに対する接続用フランジ6B,8Bの締結を解除して、連結管4Bを処理区画1内部へ搬入し、マニピュレータ22を用いて接続用フランジ6B,8Bをフランジ5,7Bに締結し、配管3及び溶融炉2Bを連結管4Bで接続し、プラントの運転を再開するようにしたものである。
【0058】
ここで、三次元写真計測とは、図2(a)に示すように、実際の計測点と撮影された写真上の計測点は、デジタルカメラ27のレンズ27aの中心を通る一本の線で結ぶことができるという共線条件と、図2(b)に示すように、それぞれ外部標定(撮影位置・姿勢)が既知の二箇所からデジタルカメラ27により二枚の写真を撮ることで、計測点の三次元位置情報を求めることができるという前方交会、並びにオリエントバー29上に設定した三次元位置情報が既知の点を四点以上撮影することで、その写真の撮影時の外部標定(撮影位置・姿勢)を求めることができるという後方交会と、図2(c)に示すように、全ての計測点を一枚の写真に写すことができないような大型もしくは複雑なものを計測する場合は、前方交会、後方交会を繰り返すことで、全ての計測点の三次元位置情報及び外部標定(撮影位置・姿勢)を求めることができることとを利用したものである。尚、図2中、23は寸法の基準となるスケールであって、撮影時には、所要箇所にスケール23を配置するようになっている。
【0059】
因みに、三次元写真計測の計測精度は、撮影条件によって多少異なるが、約±0.5[mm/10m]程度となる。
【0060】
本図示例の場合、前記機器取合位置Oには、図3に示す如く、ピン30が突設されその外周が溶接されているため、該ピン30に、環状で且つ表面に基準となるピッチ円31がレーザーマーキングされたオフセット治具32を嵌め合わせ、該オフセット治具32の表面に、図4に示す如く、それぞれ中心部に光反射部33aが形成されたシール状の計測用ターゲット33を、ピッチ円31の周方向複数箇所(図4の例では四箇所)に配置されるよう貼り付け、撮影によってデジタルカメラ27で得られる画像データから計測用ターゲット33の個々の座標を算出することにより、前記ピン30の中心座標を求め、機器取合位置Oの三次元位置情報を割り出すようにしてある。
【0061】
又、固定配管フランジ5の表面には、図5及び図6に示す如く、前述と同様の計測用ターゲット33を、固定配管フランジ5のボルト孔5aの周縁部複数所要箇所(図6の例では三箇所ずつ計九箇所)に配置されるよう貼り付け、撮影によってデジタルカメラ27で得られる画像データから計測用ターゲット33の個々の座標を算出することにより、各ボルト孔5aの中心座標と固定配管フランジ5の中心座標とを求め、固定配管フランジ取合位置Fの三次元位置情報を割り出すようにしてある。
【0062】
尚、画像データから計測用ターゲット33の光反射部33aの中心座標を計測する手法は、電子情報通信学会論文誌1999年9月号P.1391〜1400、電子情報通信学会論文誌2001年7月号P.1299〜1309に記載されている。
【0063】
次に、上記図示例の作用を説明する。
【0064】
プラント建設時には予め、機器取合位置Oと固定配管フランジ取合位置Fとの相対的位置関係が、処理区画1内の所要箇所に貼り付けられた計測用ターゲット33をデジタルカメラ27で撮影する三次元写真計測により座標データとしてパソコン28に取得されており、プラント運転開始後における機器としての溶融炉2A交換時には、新設機器としての溶融炉2Bに設けられる配管フランジ7Bと、該溶融炉2Bの機器取合位置Oに対応する位置との相対的位置関係が処理区画1外で計測され、該処理区画1外で計測された相対的位置関係並びに前記座標データに基づき、溶融炉2Bの配管フランジ7Bと固定配管フランジ5との相対的位置関係が求められ、該相対的位置関係に基づき、その位置関係が型写し治具11Aの両フランジ20A,21Aに再現されるように、フランジ21Aの位置と姿勢が適宜調整され、固定配管フランジ5に締結すべき第一の接続用フランジ6B及び溶融炉2Bの配管フランジ7Bに締結すべき第二の接続用フランジ8Bが、型写し治具11Aのフランジ20A,21Aに締結されて保持され、これらの接続用フランジ6B,8Bの間に介在すべき配管9Bが、その一端部が第一の接続用フランジ6Bに正対し且つ他端部が第二の接続用フランジ8Bに正対する形状に加工された上で、配管9Bの各端部に接続用フランジ6B,8Bが固着されて連結管4Bが形成され、この後、前記溶融炉2Bが処理区画1内部へ搬入され、機器取合位置Oに合わせて固定設置される一方、前記型写し治具11Aのフランジ20A,21Aに対する接続用フランジ6B,8Bの締結が解除されて、連結管4Bが処理区画1内部へ搬入され、マニピュレータ22を用いて接続用フランジ6B,8Bがフランジ5,7Bに締結され、配管3及び溶融炉2Bが連結管4Bで接続され、プラントの運転が再開される。
【0065】
尚、プラント建設時に、機器としての溶融炉2Aに設けられる配管フランジ7Aと、該溶融炉2Aの機器取合位置Oに対応する位置との相対的位置関係についても計測し、該計測された相対的位置関係並びに前記座標データに基づき、溶融炉2Aの配管フランジ7Aと固定配管フランジ5との相対的位置関係を求めて記録するようにしておけば、プラント運転開始後、溶融炉2Aはそのままで連結管4Aのみを交換する場合には、前記記録した溶融炉2Aの配管フランジ7Aと固定配管フランジ5との相対的位置関係に基づいて新しい連結管4Bを形成することができる。
【0066】
この結果、従来のような型取り治具10A,10Bや型写し治具11A,11Bを用いた複雑な作業を処理区画1内で行わなくて済み、処理区画1内での高度なマニピュレータ22の操作技術等が不要となり、効率良く作業を進めることが可能となる。
【0067】
又、三次元写真計測により取得された座標データを記録しておくだけで、型写し治具11B等を保管する必要もなく、大規模な保管施設が不要になると共に、その管理も行わなくて済む。
【0068】
更に又、処理区画1内部の雰囲気は、プラント運転開始後、放射線レベルの高い雰囲気となるが、従来のように型取り治具10A,10Bや型写し治具11Aを処理区画1の中で使用しなくて済むため、放射性廃棄物が減ることになる。
【0069】
こうして、処理区画1内での型取り等の複雑な作業を不要とし得、効率向上を図り得ると共に、大掛かりな治具を保管するための大規模な保管施設やその管理を不要とし得、更に、放射性廃棄物の削減にもつながる。
【0070】
尚、本発明のプラントの連結管製作方法は、上述の図示例にのみ限定されるものではなく、三次元計測としては、写真計測に限らず、レーザートラッキングやレーザースキャンといった計測方式を採用しても良いこと等、その他、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。
【0071】
【発明の効果】
以上、説明したように本発明のプラントの連結管製作方法によれば、処理区画内での型取り等の複雑な作業を不要とし得、効率向上を図り得ると共に、大掛かりな治具を保管するための大規模な保管施設やその管理を不要とし得、更に、放射性廃棄物の削減にもつながるという優れた効果を奏し得る。
【図面の簡単な説明】
【図1】本発明を実施する形態の一例の手順を示す概念図である。
【図2】本発明を実施する形態の一例における三次元写真計測の原理を示す概要図であって、(a)は共線条件、(b)は前方交会並びに後方交会、(c)は大型構造物の計測を示すものである。
【図3】本発明を実施する形態の一例におけるピンに嵌め合わされるオフセット治具を示す側断面図である。
【図4】図3のIV−IV矢視図である。
【図5】本発明を実施する形態の一例における固定配管フランジを示す側断面図である。
【図6】図5のVI−VI矢視図である。
【図7】従来の連結管製作方法の一例の手順を示す概念図である。
【図8】図7に関連する型取り治具の概念図である。
【図9】従来の連結管製作方法の他の例の手順を示す概念図である。
【符号の説明】
1 処理区画
2A 溶融炉(機器)
2B 溶融炉(新設機器)
4A 連結管
4B 連結管
5 固定配管フランジ
6A 接続用フランジ
6B 接続用フランジ
7A 配管フランジ
7B 配管フランジ
8A 接続用フランジ
8B 接続用フランジ
9A 配管
9B 配管
23 スケール
27 デジタルカメラ
28 パソコン
29 オリエントバー
33 計測用ターゲット
33a 光反射部
O 機器取合位置
F 固定配管フランジ取合位置
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a connection pipe of a plant.
[0002]
[Prior art]
FIG. 7 shows a procedure of an example of a conventional method for manufacturing a connection pipe. The procedure is intended for a plant that handles high-level radioactive liquid waste before starting operation (during construction).
[0003]
This plant has a treatment section (high radiation area) 1 having an airtight structure, and a vitrification treatment for radioactive waste liquid which is installed inside the treatment section 1 and is generated in association with reprocessing of spent fuel. A melting furnace 2A as an apparatus is provided, and an end of a pipe 3 penetrating the side wall of the processing section 1 and an upper part of the melting furnace 2A are connected via a connecting pipe 4A.
[0004]
The connection pipe 4A includes a first connection flange 6A to be fastened to the fixed pipe flange 5 of the pipe 3, a second connection flange 8A to be fastened to the pipe flange 7A of the melting furnace 2A, and a connection flange thereof. It is composed of a pipe 9A interposed between 6A and 8A.
[0005]
To manufacture the connecting pipe 4A, a mold making jig 10A and a mold copying jig 11A are used.
[0006]
As shown in FIG. 8, the molding jig 10A has a flange 12A that can be fastened to the fixed pipe flange 5 on the pipe 3 side, a flange 13A that can be fastened to the pipe flange 7A on the melting furnace 2A side, and a gap between both flanges 12A, 13A. Of the coupling member 14A, 15A, the spherical joint 16A pivotally connecting one end of the coupling member 14A to the flange 12A, the spherical joint 17A pivotally coupling one end of the coupling member 15A to the flange 13A, and the coupling members 14A, 15A. The spherical joints 18A pivotally connect the other ends to each other, and restraining means (not shown) for fixing the movements of the spherical joints 16A, 17A, 18A.
[0007]
The mold copying jig 11A is fixed to the gantry 19A, and is supported so that the flange 12A of the mold jig 10A can be fastened to the gantry 19A, and the position thereof can be adjusted with respect to the gantry 19A. It is constituted by a flange 21A that can be fastened.
[0008]
When manufacturing the connection pipe 4A, after the flange 12A of the mold jig 10A is fastened to the fixed pipe flange 5 on the pipe 3 side, the flange 12A, the connection members 14A, 15A, and the spherical joints 16A, 17A, 18A are used. The relative position of the flange 13A is appropriately adjusted, and the flange 13A is fastened to the pipe flange 7A on the melting furnace 2A side.
[0009]
Next, the movement of each of the spherical joints 16A, 17A, 18A is fixed by the restraining means, and the fastening between the flanges 5, 7A and the flanges 12A, 13A is released.
[0010]
Before the operation of the plant, the atmosphere inside the processing section 1 is the same as that in the atmosphere, so that the worker can enter and remove the mold 10A from the pipe 3 and the melting furnace 2A by entering the processing section 1. .
[0011]
Further, the mold jig 10A is carried out of the processing section 1, the flange 12A is copied and fastened to the flange 20A of the jig 11A, and then the position and orientation of the flange 21A are appropriately adjusted to mold the flange 21A. Fastened to the flange 13A of the jig 10A.
[0012]
Next, the flange 21A is fixed to the gantry 19A, and the fastening between the flanges 20A, 21A and the flanges 12A, 13A is released.
[0013]
Thereby, the relative positional relationship between the flanges 5 and 7A is reproduced on the flanges 20A and 21A.
[0014]
After the connection flanges 6A, 8A are fastened to the flanges 20A, 21A of the copying jig 11A, one end is directly opposed to the connection flange 6A and the other end is machined into a shape directly opposed to the connection flange 8A. The connecting pipe 4A is formed by fixing the connecting flanges 6A and 8A to each end of the pipe 9A.
[0015]
After that, the fastening of the connection flanges 6A, 8A to the flanges 20A, 21A is released, the connecting pipe 4A is carried into the processing section 1, and the connection flanges 6A, 8A are fastened to the flanges 5, 7A. , The pipe 3 and the melting furnace 2A are connected by a connecting pipe 4A.
[0016]
At least one of the molding jig 10A and the copying jig 11A is stored while maintaining the above-described state, and when it becomes necessary to replace the connecting pipe 4A after the plant operation starts, the jigs 10A and 11A are removed. The connection pipe 4A can be newly manufactured by using this method.
[0017]
After the start of the plant operation, the radiation level inside the processing section 1 becomes high, and the worker cannot enter. Therefore, the replacement work of the connecting pipe 4A is performed by the robot manipulator provided in the processing section 1 thereafter. 22.
[0018]
FIG. 9 shows a procedure of another example of a conventional method for manufacturing a connection pipe. This procedure is intended for a plant that handles high-level radioactive waste liquid after starting operation, and is the same as FIG. The parts denoted by reference numerals indicate the same items.
[0019]
When the connecting pipe 4A (see FIG. 7) is replaced after the start of the plant operation, as described above, the connecting pipe 4A is newly manufactured by the jigs 10A and 11A. 7) is replaced with a new melting furnace 2B, the relative positional relationship between the existing fixed piping flange 5 and the piping flange 7B of the melting furnace 2B depends on the relative position of the fixed piping flange 5 and the piping flange 7A of the melting furnace 2A. In this case, the pipe 3 and the melting furnace 2A cannot be connected by the connecting pipe 4A.
[0020]
Therefore, the positional relationship between the fixed pipe flange 5 and the pipe flange 7B is newly grasped, and the connecting pipe 4B for connecting the pipe 3 and the pipe flange 7B of the melting furnace 2B will be manufactured.
[0021]
The connection pipe 4B includes a first connection flange 6B to be fastened to the fixed pipe flange 5 of the pipe 3, a second connection flange 8B to be fastened to the pipe flange 7B of the melting furnace 2B, and a connection flange thereof. 6B and a pipe 9B interposed between 8B.
[0022]
In manufacturing the connecting pipe 4B, a mold making jig 10B and a mold copying jig 11B are used separately from the jigs 10A and 11A.
[0023]
The mold jig 10B is configured similarly to the mold jig 10A by a flange 12B that can be fastened to the fixed piping flange 5, a flange 13B that can be fastened to the piping flange 7B, a connecting member, a spherical joint, and a restraining means. .
[0024]
The copying jig 11B is configured similarly to the copying jig 11A by a gantry 19B and flanges 20B and 21B.
[0025]
When manufacturing the connecting pipe 4B, the flange 12A of the mold jig 10A is fastened to the fixed pipe flange 5 on the pipe 3 side, and then the flange 12A is connected to the spherical joints 16A, 17A, 18A shown in FIG. The relative positions of the members 14A and 15A and the flange 13A are appropriately adjusted, and the flange 13A is fastened to the pipe flange 7B on the melting furnace 2B side.
[0026]
Next, the movement of each of the spherical joints 16A, 17A, 18A is fixed by the restraining means, and the fastening between the flanges 5, 7B and the flanges 12A, 13A is released.
[0027]
Since the radiation level inside the processing section 1 is high and the worker cannot enter or remove the jig 10A, the manipulator 22 of the robot is remotely controlled from outside the processing section 1.
[0028]
Furthermore, the mold jig 10A is carried into the decontamination section, the radiation dose is confirmed, and decontamination is performed if necessary, and then the jig is transferred to the equipment repair room 25.
[0029]
Here, after the flange 12A is copied and fastened to the flange 20A of the jig 11A, the position and orientation of the flange 21A are appropriately adjusted, and the flange 21A is fastened to the flange 13A of the mold jig 10A.
[0030]
Next, the flange 21A is fixed to the gantry 19A, and the fastening between the flanges 20A, 21A and the flanges 12A, 13A is released.
[0031]
Thus, the relative positional relationship between the flanges 5 and 7B is reproduced on the flanges 20A and 21A.
[0032]
The operator 24 attaches and detaches the mold removing jig 10A.
[0033]
Thereafter, the flange 12B of the molding jig 10B is fastened to the flange 20A of the copying jig 11A, the relative positions of the flanges 12B and 13B are adjusted, and the flange 13B is attached to the flange 21A of the copying jig 11A. To conclude.
[0034]
Next, the movement of each spherical joint is fixed by the restraining means, and the fastening between the flanges 20A, 21A and the flanges 12B, 13B is released.
[0035]
The worker 26 attaches and detaches the mold removing jig 10B.
[0036]
Further, the mold jig 10B is carried out of the equipment repair room 25, and the flange 12B is copied and fastened to the flange 20B of the jig 11B. Then, the position and the posture of the flange 21B are appropriately adjusted, and the flange 21B is molded. Fastened to the flange 13B of the taking jig 10B.
[0037]
Next, the flange 21B is fixed to the gantry 19B, and the fastening between the flanges 20B, 21B and the flanges 12B, 13B is released.
[0038]
Thereby, the relative positional relationship between the flanges 5 and 7B is reproduced on the flanges 20B and 21B.
[0039]
After the connection flanges 6B, 8B are fastened to the flanges 20B, 21B of the copying jig 11B, one end is directly opposed to the connection flange 6B, and the other end is processed to be opposed to the connection flange 8B. By connecting the connecting flanges 6B and 8B to the respective ends of the pipe 9B thus formed, the connecting pipe 4B is formed.
[0040]
Thereafter, the connection between the flanges 20B, 21B and the connection flanges 6B, 8B is released, the connection pipe 4B is carried into the processing section 1, and the connection flanges 6B, 8B are connected to the flanges 5, 7B using the manipulator 22. And the pipe 3 and the melting furnace 2B are connected by a connecting pipe 4B.
[0041]
The copying jig 11B is stored while maintaining the above-mentioned state, and when the connecting pipe 4B needs to be replaced, the connecting pipe 4B can be newly manufactured.
[0042]
As an example of the method for manufacturing a connecting pipe as described above, there is a prior application 1.
[0043]
[Prior application 1]
Japanese Patent Application No. 2002-141669
[Problems to be solved by the invention]
However, when a new connecting pipe 4B is manufactured in a procedure as shown in FIG. 9, an advanced operation technique of the manipulator 22 is used for setting the positions of the flanges 12A and 13A of the mold jig 10A in the processing section 1. On the other hand, in the radiation control area such as the equipment repair room 25, the entry time is limited, so that efficient work cannot be performed.
[0045]
In addition, there is a problem that a large-scale storage facility is required to store the copying jig 11B, and the management thereof must be performed.
[0046]
Furthermore, the mold jigs 10A and 10B and the mold copy jig 11A used in an atmosphere having a high radiation level must be treated as radioactive waste, and as a result, radioactive waste increases. .
[0047]
In view of such circumstances, the present invention can obviate the need for complicated work such as molding in a processing section, can improve efficiency, and can provide a large-scale storage facility for storing large jigs and the like. An object of the present invention is to provide a method for manufacturing a connection pipe of a plant, which can eliminate the need for management and further reduce radioactive waste.
[0048]
[Means for Solving the Problems]
The present invention installs equipment at a fixed equipment connection position in a processing section, and is provided at a required location of the equipment with respect to a fixed pipe flange disposed at a fixed fixed pipe flange connection position in a processing section. A method of manufacturing a connection pipe of a plant, wherein the connection pipe flanges are connected via connection pipes provided with connection flanges at both ends of the pipe,
At the time of plant construction, in advance, the relative positional relationship between the equipment connection position and the fixed piping flange connection position is acquired as coordinate data by three-dimensional measurement,
At the time of equipment replacement after the start of plant operation, the relative positional relationship between the pipe flange provided on the new equipment and the position corresponding to the equipment connection position of the new equipment is measured outside the processing section, and measured outside the processing section. Based on the relative positional relationship and the coordinate data, the relative positional relationship between the piping flange of the newly installed equipment and the fixed piping flange is obtained,
Based on the relative positional relationship, a first connection flange to be fastened to the fixed piping flange and a second connection flange to be fastened to the new equipment piping flange are held and interposed between these connection flanges. The pipe to be processed is processed so that one end of the pipe faces the first connection flange and the other end faces the second connection flange, and the connection flange is fixed to each end of the pipe. The present invention relates to a method for manufacturing a connecting pipe of a plant, characterized in that the connecting pipe is formed by the method.
[0049]
According to the above means, the following effects can be obtained.
[0050]
At the time of plant construction, the relative positional relationship between the equipment connection position and the fixed pipe flange connection position has been acquired as coordinate data by three-dimensional measurement, and is provided for newly installed equipment at the time of equipment replacement after the start of plant operation. The relative positional relationship between the pipe flange and the position corresponding to the equipment connection position of the newly installed equipment is measured outside the processing section, and based on the relative positional relationship measured outside the processing section and the coordinate data, the new installation is performed. The relative positional relationship between the piping flange of the device and the fixed piping flange is determined, and based on the relative positional relationship, the first connecting flange to be fastened to the fixed piping flange and the second connecting flange to be fastened to the new device piping flange. Two connecting flanges are held, and a pipe to be interposed between the connecting flanges has one end facing the first connecting flange and the other end. There after having been processed to directly facing shape second connecting flanges, connecting tube is formed by connecting flanges are secured to each end of the pipe.
[0051]
As a result, it is not necessary to perform complicated operations using the conventional mold-making jigs and mold-copying jigs in the processing section, and advanced manipulator operation techniques and the like in the processing section are unnecessary, and the efficiency is improved. It is possible to proceed with the work.
[0052]
In addition, only by recording the coordinate data obtained by the three-dimensional measurement, there is no need to store a copying jig or the like, so that a large-scale storage facility is not required and its management is not required.
[0053]
Furthermore, even if the atmosphere inside the processing compartment is an atmosphere having a high radiation level, it is not necessary to use a molding jig and a copying jig in the processing compartment as in the prior art, so that radioactive waste is reduced. Will be.
[0054]
In the method for manufacturing a connection pipe of the plant, three-dimensional photograph measurement can be used as three-dimensional measurement.
[0055]
In the method for manufacturing a connection pipe of the plant, when three-dimensional photograph measurement is used as three-dimensional measurement, a target for measurement is attached to a required portion in the processing section, a scale serving as a dimensional reference, and a measurement coordinate. An orienting bar serving as a reference of the system is arranged, an image is taken by a digital camera, and individual coordinates of a measurement target can be calculated from image data obtained by the digital camera.
[0056]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0057]
FIG. 1 is an example of an embodiment of the present invention, in which parts denoted by the same reference numerals as the figures represent the same items. The relative positional relationship between O and the fixed pipe flange connection position F is acquired as coordinate data by three-dimensional photograph measurement using a digital camera 27 and a personal computer 28,
At the time of replacement of the melting furnace 2A as equipment after the start of plant operation, the relative positional relationship between the pipe flange 7B provided in the melting furnace 2B as new equipment and the position corresponding to the equipment connection position O of the melting furnace 2B is shown. The relative positional relationship between the piping flange 7B of the melting furnace 2B and the fixed piping flange 5 is measured based on the relative positional relationship measured outside the processing section 1 and the relative positional relationship measured outside the processing section 1 and the coordinate data,
Based on the relative positional relationship, the position and orientation of the flange 21A are appropriately adjusted so that the positional relationship is reproduced on both the flanges 20A and 21A of the copying jig 11A. The second connection flange 8B to be fastened to the one connection flange 6B and the pipe flange 7B of the melting furnace 2B is fastened to and held by the flanges 20A and 21A of the copying jig 11A. , 8B is processed so that one end of the pipe 9B faces the first connecting flange 6B and the other end faces the second connecting flange 8B. Connecting flanges 6B, 8B are fixed to each end to form a connecting pipe 4B,
Thereafter, the melting furnace 2B is carried into the processing section 1 and fixedly installed in accordance with the equipment connection position O, and the connection flanges 6B and 8B are fastened to the flanges 20A and 21A of the copying jig 11A. Then, the connection pipe 4B is carried into the processing section 1, the connection flanges 6B, 8B are fastened to the flanges 5, 7B using the manipulator 22, and the pipe 3 and the melting furnace 2B are connected by the connection pipe 4B. The operation of the plant is restarted.
[0058]
Here, the three-dimensional photograph measurement means that the actual measurement point and the measurement point on the photographed photograph are one line passing through the center of the lens 27a of the digital camera 27, as shown in FIG. As shown in FIG. 2B, the digital camera 27 takes two photographs from two locations whose external orientation (photographing position / posture) is known, respectively. The forward orientation that three-dimensional position information can be obtained, and the photographing of four or more points whose three-dimensional position information set on the orient bar 29 is known, enables the external orientation (photographing position) at the time of photographing the photograph.・ Position) can be obtained, and as shown in Fig. 2 (c), when measuring a large or complex object that cannot capture all measurement points in one photograph, Forward association, backward association By returning Ri is obtained by utilizing the fact that it is possible to obtain three-dimensional position information and exterior orientation of all the measurement points (photographing position and posture). In FIG. 2, reference numeral 23 denotes a scale serving as a reference for dimensions, and the scale 23 is arranged at a required position during photographing.
[0059]
Incidentally, the measurement accuracy of the three-dimensional photograph measurement is slightly different depending on the photographing conditions, but is about ± 0.5 [mm / 10 m].
[0060]
In the case of the illustrated example, as shown in FIG. 3, a pin 30 is protruded and the outer periphery thereof is welded to the equipment connection position O, so that the pitch which is annular and has a reference surface is provided on the pin 30. A circle 31 is fitted with a laser-marked offset jig 32, and a seal-shaped measurement target 33 having a light reflecting portion 33a formed at the center as shown in FIG. By pasting so as to be arranged at a plurality of locations in the circumferential direction of the pitch circle 31 (four locations in the example of FIG. 4), and calculating individual coordinates of the measurement target 33 from image data obtained by the digital camera 27 by shooting. , The center coordinates of the pin 30 are obtained, and the three-dimensional position information of the device connection position O is determined.
[0061]
As shown in FIGS. 5 and 6, a measurement target 33 similar to that described above is provided on the surface of the fixed pipe flange 5 at a plurality of required locations around the bolt hole 5a of the fixed pipe flange 5 (in the example of FIG. 6). (3 places each for a total of 9 places), and by calculating the individual coordinates of the measurement target 33 from the image data obtained by the digital camera 27 by photographing, the center coordinates of each bolt hole 5a and the fixed piping The center coordinates of the flange 5 are obtained, and the three-dimensional position information of the fixed pipe flange fitting position F is determined.
[0062]
A method for measuring the center coordinates of the light reflecting portion 33a of the measurement target 33 from the image data is described in IEICE Transactions, September 1999, p. 1391-1400, IEICE Transactions, July 2001, p. 1299-1309.
[0063]
Next, the operation of the illustrated example will be described.
[0064]
At the time of plant construction, the relative positional relationship between the equipment connection position O and the fixed pipe flange connection position F is determined in advance by using the digital camera 27 to photograph the measurement target 33 attached to a required portion in the processing section 1. It is acquired by the personal computer 28 as coordinate data by the original photograph measurement, and when the melting furnace 2A is replaced as a device after the start of plant operation, the piping flange 7B provided in the melting furnace 2B as a new device and the device of the melting furnace 2B The relative positional relationship with the position corresponding to the joining position O is measured outside the processing section 1 and, based on the relative positional relationship measured outside the processing section 1 and the coordinate data, the pipe flange 7B of the melting furnace 2B. The relative positional relationship between the fixing pipe flange 5 and the fixed piping flange 5 is obtained, and based on the relative positional relationship, the positional relationship is imprinted on both flanges 20 of the jig 11A. , 21A, the position and posture of the flange 21A are appropriately adjusted, and the first connection flange 6B to be fastened to the fixed piping flange 5 and the second connection flange to be fastened to the piping flange 7B of the melting furnace 2B. The connection flange 8B is fastened and held to the flanges 20A and 21A of the copying jig 11A, and one end of a pipe 9B to be interposed between the connection flanges 6B and 8B is connected to the first connection flange. The connection pipe 4B is formed by fixing the connection flanges 6B and 8B to each end of the pipe 9B after processing the flange 6B into a shape facing the second connection flange 8B at the other end. Thereafter, the melting furnace 2B is carried into the processing section 1 and fixedly installed in accordance with the equipment connection position O, while the connecting flange to the flanges 20A and 21A of the copying jig 11A is provided. 6B and 8B are released, the connection pipe 4B is carried into the processing section 1, the connection flanges 6B and 8B are connected to the flanges 5 and 7B using the manipulator 22, and the pipe 3 and the melting furnace 2B are connected. The connection is established by the pipe 4B, and the operation of the plant is restarted.
[0065]
At the time of plant construction, the relative positional relationship between the pipe flange 7A provided in the melting furnace 2A as equipment and the position corresponding to the equipment connection position O of the melting furnace 2A was also measured, and the measured relative position was measured. If the relative positional relationship between the pipe flange 7A of the melting furnace 2A and the fixed pipe flange 5 is determined and recorded based on the positional relationship and the coordinate data, after the plant operation starts, the melting furnace 2A is left as it is. When only the connection pipe 4A is replaced, a new connection pipe 4B can be formed based on the recorded relative positional relationship between the pipe flange 7A of the melting furnace 2A and the fixed pipe flange 5.
[0066]
As a result, it is not necessary to perform complicated operations using the conventional mold-making jigs 10A and 10B and the mold-copying jigs 11A and 11B in the processing section 1, and the advanced manipulator 22 in the processing section 1 is not required. Operation techniques and the like become unnecessary, and work can be efficiently performed.
[0067]
In addition, since only the coordinate data obtained by the three-dimensional photograph measurement is recorded, it is not necessary to store the copying jig 11B or the like, and a large-scale storage facility is not required, and the management thereof is not performed. I'm done.
[0068]
Further, the atmosphere inside the processing section 1 becomes an atmosphere having a high radiation level after the start of the plant operation. However, the mold jigs 10A and 10B and the mold copying jig 11A are used in the processing section 1 as in the related art. Radioactive waste will be reduced.
[0069]
In this way, complicated work such as molding in the processing section 1 can be eliminated, efficiency can be improved, and a large-scale storage facility for storing a large jig and its management can be eliminated. It also leads to the reduction of radioactive waste.
[0070]
In addition, the method for manufacturing a connection pipe of a plant of the present invention is not limited to the above illustrated example, and the three-dimensional measurement is not limited to the photo measurement, and adopts a measurement method such as laser tracking or laser scan. It goes without saying that various modifications can be made without departing from the spirit of the present invention.
[0071]
【The invention's effect】
As described above, according to the method for manufacturing a connection pipe of a plant of the present invention, complicated work such as molding in a processing section can be unnecessary, efficiency can be improved, and a large-scale jig is stored. This eliminates the need for a large-scale storage facility and its management, and also has an excellent effect of reducing radioactive waste.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a procedure of an example of an embodiment of the present invention.
FIGS. 2A and 2B are schematic diagrams showing the principle of three-dimensional photograph measurement in an example of an embodiment of the present invention, wherein FIG. 2A shows collinear conditions, FIG. It shows measurement of a structure.
FIG. 3 is a side sectional view showing an offset jig fitted to a pin in an example of an embodiment of the present invention.
FIG. 4 is a view taken in the direction of arrows IV-IV in FIG. 3;
FIG. 5 is a side sectional view showing a fixed piping flange in an example of an embodiment of the present invention.
FIG. 6 is a view taken in the direction of arrows VI-VI in FIG. 5;
FIG. 7 is a conceptual diagram showing a procedure of an example of a conventional connecting pipe manufacturing method.
FIG. 8 is a conceptual diagram of a molding jig related to FIG. 7;
FIG. 9 is a conceptual diagram showing a procedure of another example of a conventional method for manufacturing a connection pipe.
[Explanation of symbols]
1 processing section 2A melting furnace (equipment)
2B melting furnace (new equipment)
4A Connecting pipe 4B Connecting pipe 5 Fixed pipe flange 6A Connection flange 6B Connection flange 7A Pipe flange 7B Pipe flange 8A Connection flange 8B Connection flange 9A Pipe 9B Pipe 23 Scale 27 Digital camera 28 Personal computer 29 Orient bar 33 Measurement target 33a Light reflection part O Equipment connection position F Fixed piping flange connection position

Claims (3)

処理区画内の不変の機器取合位置に機器を設置し、処理区画内の不変の固定配管フランジ取合位置に配設される固定配管フランジに対し、機器の所要箇所に設けられた配管フランジを、配管の両端部に接続用フランジが設けられた連結管を介して接続するようにしたプラントの連結管製作方法であって、
プラント建設時に予め、機器取合位置と固定配管フランジ取合位置との相対的位置関係を、三次元計測により座標データとして取得しておき、
プラント運転開始後における機器交換時、新設機器に設けられる配管フランジと、該新設機器の機器取合位置に対応する位置との相対的位置関係を処理区画外で計測し、該処理区画外で計測された相対的位置関係並びに前記座標データに基づき、新設機器の配管フランジと固定配管フランジとの相対的位置関係を求め、
該相対的位置関係に基づき、固定配管フランジに締結すべき第一の接続用フランジ及び新設機器の配管フランジに締結すべき第二の接続用フランジを保持し、これらの接続用フランジの間に介在すべき配管を、その一端部が第一の接続用フランジに正対し且つ他端部が第二の接続用フランジに正対する形状に加工した上、配管の各端部に接続用フランジを固着して連結管を形成することを特徴とするプラントの連結管製作方法。
Install the equipment at the fixed equipment connection position in the processing section, and attach the piping flange provided at the required location of the equipment to the fixed pipe flange installed at the fixed fixed pipe flange connection position in the processing section. A method of manufacturing a connection pipe for a plant, wherein the connection is performed via a connection pipe provided with connection flanges at both ends of the pipe,
At the time of plant construction, the relative positional relationship between the equipment connection position and the fixed piping flange connection position is acquired as coordinate data by three-dimensional measurement,
At the time of equipment replacement after the start of plant operation, the relative positional relationship between the pipe flange provided on the new equipment and the position corresponding to the equipment connection position of the new equipment is measured outside the processing section, and measured outside the processing section. Based on the relative positional relationship and the coordinate data, the relative positional relationship between the piping flange of the newly installed equipment and the fixed piping flange is obtained,
Based on the relative positional relationship, a first connection flange to be fastened to the fixed piping flange and a second connection flange to be fastened to the new equipment piping flange are held and interposed between these connection flanges. The pipe to be processed is processed so that one end of the pipe faces the first connection flange and the other end faces the second connection flange, and the connection flange is fixed to each end of the pipe. A method for manufacturing a connection pipe for a plant, comprising forming a connection pipe by using a pipe.
三次元計測として三次元写真計測を用いた請求項1記載のプラントの連結管製作方法。The method of claim 1, wherein three-dimensional photograph measurement is used as the three-dimensional measurement. 処理区画内の所要箇所に、計測用ターゲットを貼り付けると共に、寸法の基準となるスケールと、計測座標系の基準となるオリエントバーとを配置してデジタルカメラにより撮影を行い、該デジタルカメラで得た画像データから計測用ターゲットの個々の座標を算出するようにした請求項2記載のプラントの連結管製作方法。Attach a measurement target to a required location in the processing section, and place a scale serving as a reference for dimensions and an orient bar serving as a reference for a measurement coordinate system. 3. The method according to claim 2, wherein individual coordinates of the measurement target are calculated from the image data.
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