JP2012236221A - Auxiliary device for welding pipe and method of using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a drawback that difference is caused in the quality of welding by hand waving or the like of a worker during welding work in a semi-automatic welding when conventionally welding the joint part between pipes which are joined vertically.SOLUTION: An auxiliary device for welding pipes is composed of an annular guide rail which is provided along the peripheral direction of the outer peripheral surface of a lower pipe in the welding of the pipes which are joined vertically and a welding torch supporting base for supporting the welding torch of a welding equipment.

Description

  The present invention relates to a pipe welding assist device and welding method, and more particularly to a device for assisting semi-automatic welding of a steel pipe pile and a welding method thereof.

  Conventionally, when welding joints of steel pipe piles that are joined up and down, in semi-automatic welding, the welding torch of the welding device is operated by the welding operator's hand, but no device that supports the welding torch has been used. .

  As such semi-automatic welding, for example, there is known document 1.

Japanese Utility Model Publication No. 61-102939

  However, the method of moving the welding torch in semi-automatic welding is an important and delicate operation, and there is a possibility that non-uniform welding occurs due to camera shake of the welding operator and the quality of the welded part is deteriorated.

  The present invention eliminates the above-mentioned drawbacks.

  The pipe welding auxiliary device according to the present invention includes an annular guide rail provided along the circumferential direction on the outer peripheral surface of a lower pipe in welding of pipes joined up and down, and a welding apparatus welding that can move the guide rail freely. It comprises a welding torch support base that supports the torch.

  In the pipe welding method of the present invention, the annular guide rail provided along the outer peripheral surface of the lower pipe in the welding of the pipes joined up and down supports the welding torch of the welding apparatus on the movable welding torch support base. The lower tube and the upper tube are welded by moving the welding torch supported by the welding torch support base.

  According to the present invention, the welding operator can support the welding torch on the welding torch support base that is movable in the circumferential direction of the pipe, thereby preventing the vertical shaking of the welding operator during welding. There is a great advantage that the quality of the weld can be kept constant.

  Further, it is possible to reduce the burden on the arm of the welding worker during long-time continuous work.

It is a perspective view of the welding auxiliary equipment of the pipe of the present invention. It is a perspective view of the principal part of the welding auxiliary equipment of the pipe of the present invention. It is a disassembled perspective view for description of the guide rail of the pipe welding auxiliary device of the present invention. It is a perspective view of the welding auxiliary mount of the pipe welding auxiliary device of the present invention. It is.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 show a pipe welding auxiliary device of the present invention, 1 shows, for example, a lower steel pipe pile placed in the vertical direction on the ground 2, and the pile head of the lower steel pipe pile 1 has The contact pipe 3 is welded in advance.

  4 shows an upper steel pipe pile having the same diameter as the lower steel pipe pile 1, which is joined to the lower steel pipe pile 1, and the upper steel pipe pile 4 is inserted into the contact pipe 3 of the lower steel pipe pile 1. The joint pipe 5 and the joint portion 5 of the upper steel pipe pile 4 are welded by a welding device 6.

  7 shows the annular mount attached to the outer peripheral surface of the said lower steel pipe pile 1 vicinity of the said joint part 5 detachably horizontally along the circumferential direction, for example. As shown in FIGS. 1 and 3, the gantry 7 includes a guide rail 8 made up of two semicircular arc-shaped divided guide rails 8a and 8a and both ends of the divided guide rails 8a at right angles. On the inner peripheral surface of each of the divided guide rails 8a for positioning the plate-like connecting portion 9 provided inside and the divided guide rails 8a coaxially with the lower steel pipe pile 1 at a desired interval. A plurality of legs 10 that are spaced apart from each other, and curved plate-like shapes that match the outer peripheral surface of the lower steel pipe pile 1 provided at the tips of the connecting parts 9 and the ends of the legs 10, respectively. And a cushion member 12 such as a rubber packing provided inside the contact part 11.

  And the connection parts 9 and 9 of the said division | segmentation guide rails 8a and 8a are fastened with fasteners (not shown), such as a volt | bolt, for example, and come to be firmly fixed to the said lower steel pipe pile 1. FIG.

  In addition, instead of using the semicircular arc-shaped divided guide rail divided into two bodies, the annular mount 7 may be formed using an arc-shaped divided guide rail divided into three or more bodies.

  Reference numeral 13 denotes a welding auxiliary frame that can move the guide rail 8. The welding auxiliary frame 13 includes a moving member 14 that can move the guide rail 8 and an upper end of the moving member 14, as shown in FIG. 4. And a welding torch support base 15 made of a horizontal plate.

  The moving member 14 is provided on each of the rectangular vertical plate 16 and the left and right sides of the back surface of the vertical plate 16, and the upper roller 17 and the lower portion sandwiching the upper and lower edges of the guide rail 8 from the vertical direction, respectively. It consists of a roller 18.

  Since the pipe welding auxiliary device according to the present invention is configured as described above, first, the welding operator supports the lower end of the welding torch portion 6 a of the welding device 6 on the welding torch support base 15.

  As a result, the welding operator moves along the guide rail 8 and supports the welding torch portion 6a on the gantry 7 so that the gantry 7 moves on the guide rail 8 in the horizontal direction. Thus, the joint portion 5 can be welded.

  According to the present invention, since welding is performed while supporting the welding torch portion 6a of the welding apparatus on the welding torch support base 15, it is possible to prevent the vertical shaking of the welding operator during welding. There is a big benefit that the quality of the department can be kept constant.

  Further, it is possible to reduce the burden on the arm of the welding worker during long-time continuous work.

  Moreover, since the welding auxiliary mount 13 uses a roller, it can be moved smoothly in the horizontal direction.

DESCRIPTION OF SYMBOLS 1 Lower steel pipe pile 2 Ground 3 Contact pipe 4 Upper steel pipe pile 5 Joint part 6 Welding device 6a Welding torch part 7 Base 8 Guide rail 8a Dividing guide rail 9 Connection part 10 Foot part 11 Contact part 12 Cushion member 13 Welding support base 14 Moving member 15 Torch support 16 Vertical plate 17 Upper roller 18 Lower roller

Claims (2)

An annular guide rail provided along the circumferential direction on the outer peripheral surface of the lower pipe in the welding of the pipe to be joined up and down;
A welding assistance device for a pipe, comprising: a welding torch support base that supports a welding torch of a welding device, the guide rail being movable.   An annular guide rail provided along the outer peripheral surface of the lower pipe in the welding of the pipe joined up and down supports the welding torch of the welding apparatus on the movable welding torch support base, and supports the above-mentioned welding torch support base A pipe welding method comprising welding the lower pipe and the upper pipe by moving a welding torch.

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