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BACKING RING FOR WELDING CONNECTION OF DIFFERENT DIAMETER PIPES IN STEEL PIPE PILE
To easily and inexpensively manufacture a backing metal that can be used when butt welding two steel pipes with slightly different inner diameters.SOLUTION: A backing ring 81 comprises: a large-diameter portion 81a movably fitted to an inner surface of a large-inner-diameter-side steel pipe (large-diameter steel pipe pile 51); and a small-diameter portion 81b movably fitted to an inner surface of a small-inner-diameter side steel pipe (large-diameter short pipe 13), which are integrally continuous with a stepped portion 81c interposed. The backing ring has an incision 81d in a part of a circumferential direction so as to allow diameters thereof to be elastically reduced. For example, in the case of connecting the large-diameter steel pipe pile 51, which is an expanding pile, on an upper side, and the small-diameter steel pipe pile 52 on a lower side through a different-diameter-steel-pipe-piles-connection member 10, that can be used, for example, as a backing for butt-welding the large-diameter steel pipe pile 51 and the large-diameter short pipe 13 of the different-diameter-steel-pipe-piles-connection member 10. For example, the backing ring can be manufactured at low cost through a simple process of forming a strip of steel plate into a curved ring shape added with a step by pressing.SELECTED DRAWING: Figure 3
【課題】内径が僅かに異なる２つの鋼管を突合せ溶接する場合に使用可能な裏当て金を、簡単にかつ安価に製作することを可能にする。【解決手段】裏当てリング８１は、内径大側鋼管（大径鋼管杭５１）の内面に可動に嵌合する大径部分８１ａと、内径小側鋼管（大径短尺管１３）の内面に可動に嵌合する小径部分８１ｂとが段差部８１ｃを介在させて一体連続してなるとともに、周方向の一部に切込み８１ｄを有して弾性的に径が縮小可能とされている。例えば、拡頭杭である上側の大径鋼管杭５１と下側の小径鋼管杭５２とを異形鋼管杭接続部材１０を介して連結する場合では、例えば大径鋼管杭５１と異形鋼管杭接続部材１０の大径短尺管１３とを突合せ溶接する際の裏当て金として用いることができる。例えば、短冊状の鋼板をプレス加工により段差を付け、リング状に湾曲成形するという簡単な加工で安価に製作できる。【選択図】図３
BACKING RING FOR WELDING CONNECTION OF DIFFERENT DIAMETER PIPES IN STEEL PIPE PILE
To easily and inexpensively manufacture a backing metal that can be used when butt welding two steel pipes with slightly different inner diameters.SOLUTION: A backing ring 81 comprises: a large-diameter portion 81a movably fitted to an inner surface of a large-inner-diameter-side steel pipe (large-diameter steel pipe pile 51); and a small-diameter portion 81b movably fitted to an inner surface of a small-inner-diameter side steel pipe (large-diameter short pipe 13), which are integrally continuous with a stepped portion 81c interposed. The backing ring has an incision 81d in a part of a circumferential direction so as to allow diameters thereof to be elastically reduced. For example, in the case of connecting the large-diameter steel pipe pile 51, which is an expanding pile, on an upper side, and the small-diameter steel pipe pile 52 on a lower side through a different-diameter-steel-pipe-piles-connection member 10, that can be used, for example, as a backing for butt-welding the large-diameter steel pipe pile 51 and the large-diameter short pipe 13 of the different-diameter-steel-pipe-piles-connection member 10. For example, the backing ring can be manufactured at low cost through a simple process of forming a strip of steel plate into a curved ring shape added with a step by pressing.SELECTED DRAWING: Figure 3
【課題】内径が僅かに異なる２つの鋼管を突合せ溶接する場合に使用可能な裏当て金を、簡単にかつ安価に製作することを可能にする。【解決手段】裏当てリング８１は、内径大側鋼管（大径鋼管杭５１）の内面に可動に嵌合する大径部分８１ａと、内径小側鋼管（大径短尺管１３）の内面に可動に嵌合する小径部分８１ｂとが段差部８１ｃを介在させて一体連続してなるとともに、周方向の一部に切込み８１ｄを有して弾性的に径が縮小可能とされている。例えば、拡頭杭である上側の大径鋼管杭５１と下側の小径鋼管杭５２とを異形鋼管杭接続部材１０を介して連結する場合では、例えば大径鋼管杭５１と異形鋼管杭接続部材１０の大径短尺管１３とを突合せ溶接する際の裏当て金として用いることができる。例えば、短冊状の鋼板をプレス加工により段差を付け、リング状に湾曲成形するという簡単な加工で安価に製作できる。【選択図】図３
BACKING RING FOR WELDING CONNECTION OF DIFFERENT DIAMETER PIPES IN STEEL PIPE PILE
鋼管杭における異径管溶接接続用の裏当てリング
ENOMOTO TAKAHIKO (author)
2020-10-22
Patent
Electronic Resource
Japanese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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