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    • 3. 发明公开
    • NOZZLE WELDING METHOD, NOZZLE PART REPAIRING METHOD, AND NOZZLE WELDED STRUCTURE
    • DÜSENSCHWEISSVERFAHREN,DÜSENTEILREPARATURVERFAHRENUNDDÜSEARCHCHWEISSTESTRUKTUR
    • EP2484479A1
    • 2012-08-08
    • EP10820216.9
    • 2010-06-10
    • Mitsubishi Heavy Industries, Ltd.
    • KAMO, KazuhikoNARITA, RyuichiHORI, Nobuyuki
    • B23K31/00B23K9/00B23K9/028B23K9/04B23K9/095B23K33/00G21C13/00G21C19/02
    • G21C13/02F16L5/022G21C13/036Y02E30/40
    • To provide nozzle welding method which can be performed automatically and efficiently, and which can also be performed under the condition of a high-exposure amount. The nozzle welding method includes: a built-up groove forming process of forming a built-up groove portion (21) by digging an inner surface (19) of a vessel into a substantially cylindrical shape in a range including at least a J-groove (27); a build-up welding process of forming a built-up weld portion in the built-up groove portion (21) by build-up welding in such a manner that a plug (31) is configured by a plug main body portion (33) having an inner end surface (37) forming an extending portion of the outer surface (29) of the built-up groove portion (21), and is also configured by a projecting portion (35) projected from the inner end surface (37) and having an axis center substantially coincident with the axis center of the build-up groove portion (21), and the plug (31) is inserted into a nozzle hole (13) so as to make the inner end surface (37) substantially coincident with the outer surface (29) of the built-up groove portion (21); a vessel side weld groove portion forming process of forming the J-groove (27) in the build-up weld portion; and a nozzle attaching process of completing the J-groove (27) portion by inserting the nozzle and welding the J-groove (27) portion.
    • 提供可以自动且有效地进行的喷嘴焊接方法,也可以在高曝光量的条件下进行。 喷嘴焊接方法包括:通过将容器的内表面(19)在至少包括J形槽的范围内大致圆筒形地挖掘形成积层槽部(21)的积层槽形成工艺 (27); 通过积层焊接以使插头(31)由插头主体部(33)构成的方式,在积层槽部(21)中形成积层焊接部的积层焊接工序, 具有形成所述积层槽部(21)的外表面(29)的延伸部分的内端面(37),并且还由从所述内端面(37)突出的突出部(35)构成, 并且具有与积聚槽部(21)的轴心大致一致的轴心,并且将插头(31)插入喷嘴孔(13)中,以使内端面(37)大致一致 与积层槽部分(21)的外表面(29)相连; 在积层焊接部中形成J槽(27)的容器侧焊接槽部形成工序; 以及通过插入喷嘴并焊接J形槽(27)部分来完成J形槽(27)部分的喷嘴附接工艺。