JPH0362684U

JPH0362684U -

Info

Publication number: JPH0362684U
Application number: JP12378289U
Authority: JP
Priority date: 1989-10-23
Filing date: 1989-10-23
Publication date: 1991-06-19

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す縦断面図、第
２図は第１図のシールド治具の移動要領を示す同
じく縦断面図、第３図は第１図のシールド治具の
曲り管内移動要領を示す同じく縦断面図である。
第４図は公知の管突合わせ溶接部内面シールド治
具を示す部分縦断側面図、第５図は公知の曲り管
を含む複数管を順次突合わせ溶接する際の溶接開
先の配置を示す平面図である。１……シールド治具本体（治具本体）、２……
牽引ロープ、３……環状シールチユーブ、４……
ガスレンズ、５……環状シールチユーブ、６……
シールドガス導入筒、７……加圧ガス導入筒、８
……シールドガス孔、９……シールドガス注入口
、１０……加圧ガス注入口、１１，１２……加圧
ガス注入口、１３……ガス抜き孔、１４……ガス
導入口、１５……ガス抜き口、１６……チユーブ
加圧ガス、１７……シールド区画、１８……曲り
管、０１……溶接トーチ、０２，０３……管、０
４……溶接継手、０９……シールドガス、０１１
……溶接開先。 Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view showing how the shield jig shown in Fig. 1 moves, and Fig. 3 shows the bending of the shield jig shown in Fig. 1. FIG. 2 is a vertical sectional view showing how to move within the pipe.
Fig. 4 is a partial longitudinal sectional side view showing a known tube butt weld inner surface shielding jig, and Fig. 5 is a plan view showing the arrangement of weld grooves when sequentially butt welding multiple pipes including a known bent pipe. It is a diagram. 1... Shield jig body (jig body), 2...
Towing rope, 3... Annular seal tube, 4...
Gas lens, 5... Annular seal tube, 6...
Shield gas introduction tube, 7... Pressurized gas introduction tube, 8
... Shield gas hole, 9... Shield gas inlet, 10... Pressurized gas inlet, 11, 12... Pressurized gas inlet, 13... Gas vent hole, 14... Gas inlet, 15... ...Gas vent, 16...Tube pressurized gas, 17...Shield section, 18...Bent pipe, 01...Welding torch, 02,03...Pipe, 0
4...Welded joint, 09...Shield gas, 011
...Welding groove.

Claims

[Scope of utility model registration request]

In a tube butt weld inner surface shielding jig that forms a partition section by partitioning the front and rear surfaces of the inner surface of a tube butt weld groove and can replace the inside with shielding gas, inserting the inside of the butt tube. A tow rope is attached to the front end, a front end annular seal tube is installed around the front end, a gas range is attached to the center, a rear end annular seal tube is installed around the rear end, and a shield gas introduction tube and tube are installed at the rear end. A bar-shaped shielding jig main body from which pressurized gas introduction tubes are respectively protruded, and a shielding gas capable of flowing out of the shielding gas from the shielding gas introduction tubes perforated therein to the central side surface of the shielding jig main body. A pipe butt welded part characterized in that it has a pressurized gas hole capable of supplying pressurized gas from the pressurized gas introduction tube to the front end annular seal tube and the rear end annular seal tube, respectively. Inner shield jig.