JP4399952B2 - Metal plate support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a metal plate support device used for butt-single-sided welding.
[0002]
[Prior art]
FIG. 5 shows an example of a conventional metal plate support device. This metal plate support device has a groove portion of metal plates (stainless steel plates) 1 and 2 to be joined to each other by butt one-side welding on the side opposite to the welding surface. A square bar-shaped backing material (backing copper plate) 3 coated with a metal, and a notch 4a fitted to the backing material 3 at one edge, and tack welding to the anti-welding surface of the metal plates 1 and 2 Strong back that is fitted into a key nut 7 that has a restraining plate 4 that is to be attached and a notch 5a that is loosely fitted to the backing material 3 at one edge and that is attached to the anti-welding surface of the metal plates 1 and 2 It includes a key plate 5, a wedge-shaped member 6 inserted between the strong back key plate 5 and the key nut 7, and a dove plate 8 that is temporarily welded to the end faces of the metal plates 1 and 2.
[0003]
On the surface of the backing material 3 facing the metal plates 1 and 2, a groove 3 a passing through the groove portion of the metal plates 1 and 2 is formed, and the dove plate 8 has a metal plate. Grooves 8a that are continuous with the groove portions 1 and 2 are formed.
[0004]
When performing butt one-side welding using the metal plate support device described above, the strong back key plate 5 and the key nut 7 are attached to the anti-welding surface of the metal plates 1 and 2 to be welded to each other. The wedge-shaped member 6 is inserted between the plate 5 and the key nut 7, and the insertion amount of the wedge-shaped member 6 is adjusted, so that the thickness direction and the plate width direction of both metal plates 1 and 2 do not cause a mistake. Adjust the relative position of.
[0005]
Next, the restraint plate 4 is attached to the anti-welding surface of the metal plates 1 and 2 to restrain displacement and angular change in the plate width direction of both the metal plates 1 and 2, and the dove plate is attached to the end surfaces of the metal plates 1 and 2. 8 is attached.
[0006]
In this state, argon gas is continuously fed into the gap between the groove 3a of the backing material 3 and the metal plates 1 and 2 to keep the gap in an inert gas atmosphere. TIG welding is performed on the groove portions of the metal plates 1 and 2 from the side of the welding surface that is not arranged.
[0007]
After the TIG welding of the metal plates 1 and 2 is completed, the restraint plate 4, the strong back key plate 5, the wedge-shaped member 6, the key nut 7 and the dove plate 8 attached to the metal plates 1 and 2 are removed.
[0008]
FIG. 6 shows an example of a liquefied gas storage tank. In this liquefied gas storage tank, a side liner 10 that extends along the inner wall surface of the housing 9, a bottom liner 11 that extends along the inner bottom surface of the housing 9, and A lining is constituted by a corner liner 12 whose upper edge is overlapped and welded to the side liner 10 and whose lower edge is overlapped and welded to the bottom liner 11.
[0009]
[Problems to be solved by the invention]
In recent years, when a liquefied gas storage tank having a lining structure as shown in FIG. 6 is constructed, a large number of metal plates bent in advance are sequentially joined in the circumferential direction of the casing 9 by butt one-side welding from the center side of the casing 9. Thus, formation of the corner liner 12 has been studied.
[0010]
However, in the lining structure shown in FIG. 6, the gap between the corner liner 12 and the housing 9 is too small, and it is difficult for the operator to pass through the gap, and the metal plate support device shown in FIG. , The restraint plate 4, the strong back key plate 5, the wedge-shaped member 6, and the key nut 7 are arranged on the anti-welding surface side of the metal plates 1 and 2, and the position setting and back of the metal plates 1 and 2 before the start of TIG welding. Since the material 3 is supported from the anti-welding surface side, the metal plate supporting device shown in FIG. 5 cannot be applied to the formation of the corner liner 12 as described above.
[0011]
The present invention has been made in view of the above-described circumstances, and provides a metal plate support device that can support the backing material from the welding construction surface side and can set the position of the metal plate to be butt-welded from the welding construction surface side. It is intended to provide.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, in the metal plate support device according to claim 1 of the present invention, a first support body disposed on the anti-welding surface side of the metal plate to be butt-welded one side, A second support body arranged on the welding surface side of the metal plate to be welded on one side, and a welding groove portion of the metal plate to be butt-welded on one side are coated from the anti-welding surface side and on the welding groove portion. A backing material in which grooves extending opposite to each other are formed, a support fastening bolt that is inserted into the second support and can be screwed to the first support, and a back that is inserted into the second support and back A backing material fixing bolt that can be screwed to the material, and an adjustment bolt that is screwed to the second support and whose tip portion can contact the welding surface of the metal plate to be butt welded Yes.
[0013]
In the metal plate support device according to the second aspect of the present invention, a gas supply channel is provided inside the backing material, and a communication hole connected to the groove from the gas supply channel is formed.
[0014]
In either of the metal plate support apparatuses according to claim 1 or 2 of the present invention, the welding of the first support and the metal plate arranged on the side opposite to the welding surface of the metal plate to be butt-welded is welded. In a state where the second support body arranged on the surface side is mutually fastened with the support body fastening bolts, the backing material fixing bolt inserted through the second support body is attached to the anti-welding surface of the metal plate. Screwed to the backing material arranged on the side, supporting the backing material from the welding surface side, and screwing the adjustment bolt to the second support so that the tip of it contacts the metal plate The position of the metal plate is set from the welding surface side.
[0015]
In the metal plate supporting device according to claim 2 of the present invention, the groove that opposes the inert gas fed to the gas supply flow path of the backing material from the communication hole to the weld groove portion of the metal plate. The gap between the weld groove portion of the metal plate and the backing material is maintained in an inert gas atmosphere.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 to FIG. 4 show an example of an embodiment of the metal plate support device of the present invention, and this metal plate support device is arranged on the side opposite to the welding surface of the left and right metal plates 1 and 2 to be butt-welded. The first support 21 to be applied, the second support 22 arranged on the welding surface side of the metal plates 1 and 2, and the groove portion of the metal plates 1 and 2 are covered from the anti-welding surface side. A backing material 23, a support fastening bolt 24, a backing material fixing bolt 25, and an adjustment bolt 26 are provided.
[0018]
The metal plates 1 and 2 to be subjected to butt single-sided welding are bent into a curved shape like a corner liner 12 shown in FIG. 6, and are TIG welded with a concave curved surface as a welding surface.
[0019]
The first support body 21 is provided with a support member 27 that is curved along the groove portions of the metal plates 1 and 2, and is disposed on the left and right sides of the support member 27 and along the vicinity of the groove portions of the metal plates 1 and 2. The support member 28 that is curved, and a plurality of connecting members 29 that are disposed at substantially equal intervals in the vertical direction and that are fixed to the convex curved surfaces of the support members 27 and 28 and extend in the lateral direction are configured in a lattice shape.
[0020]
Flat steel is used for the support members 27 and 28 and the connecting member 29.
[0021]
The support members 27 and 28 have arcs longer than the metal plates 1 and 2 and are gently curved so that both end portions thereof can be located outside the upper and lower edges of the metal plates 1 and 2.
[0022]
At the four corners of the first support 21, holes 21 a that penetrate the support member 28 and the connecting member 29 in the thickness direction are formed, and holes 21 a are formed on the surface of the connecting member 29 on the side opposite to the supporting member. A nut 24a to which the support fastening bolt 24 can be screwed is fixed.
[0023]
The second support 22 includes left and right support members 30 that are curved along the metal plates 1 and 2, and upper and lower connecting members that are fixed to the upper and lower ends of the concave curved surface of the support member 30 and extend in the lateral direction. 31 and is configured in a frame shape.
[0024]
Angle steel is used for the support member 30, and flat steel is used for the connecting member 31.
[0025]
The support member 30 is curved longer than the metal plates 1 and 2 so that both end portions thereof can be located outside the upper and lower edges of the metal plates 1 and 2.
[0026]
At the four corners of the second support 22, holes 22 a that penetrate the support member 30 and the connecting member 31 in the thickness direction and through which the support fastening bolts 24 are inserted are formed. A hole 31a that penetrates in the thickness direction and through which the backing material fixing bolt 25 is inserted is formed in the intermediate portion.
[0027]
Further, a plurality of holes 30a penetrating in the plate thickness direction are formed in the support member 30 in a line in the member longitudinal direction, and the concave curved surface of the support member 30 corresponds to the holes 30a. A nut 26a to which the adjusting bolt 26 can be screwed is fixed.
[0028]
The backing material (backing copper plate) 23 is curved longer than the metal plates 1 and 2 so that both end portions thereof can be located outside the upper and lower edges of the metal plates 1 and 2.
[0029]
On the surface of the backing material 23 that covers the groove portions of the metal plates 1 and 2, a groove 23 a that extends opposite to the groove portion is formed.
[0030]
In addition to this, the backing material 23 is formed with a gas supply channel 23b that passes vertically in the longitudinal direction of the member and a communication hole 23c that penetrates from the gas supply channel 23b to the groove 23a.
[0031]
Further, a screw hole 23 d into which the backing material fixing bolt 25 can be screwed is provided at the upper end portion and the lower end portion of the backing material 23.
[0032]
When performing butt one-side welding using the metal plate support device shown in FIGS. 1 to 4, the first support 21 is installed according to the groove portions of the metal plates 1 and 2 to be joined to each other. Then, the backing material 23 is placed on the concave curved surface of the support member 27 of the first support 21.
[0033]
Next, the metal plate 1 is disposed on the left side portion of the first support 21, the metal plate 2 is disposed on the right side portion of the first support 21, and the groove portions of these metal plates 1 and 2 are backing materials. 23 so as to overlap.
[0034]
Further, the second support 22 is disposed on the welding surface side of the metal plates 1 and 2, and the tip of the support fastening bolt 24 inserted through the hole 22 a is screwed onto the nut 24 a of the first support 21. The second support 22 is fastened to the first support 21, and the tip of the backing material fixing bolt 25 inserted through the hole 31 a is screwed into the screw hole 23 d of the backing material 23. Then, the backing material 23 is fixed to the second support 22.
[0035]
In addition to this, the adjusting bolt 26 is screwed into the nut 26a of the second support 22 so that the tip end thereof is in contact with the welding surface of the metal plates 1 and 2, and the metal plates 1 and 2 are The displacement in the plate width direction is constrained and the protruding amount of the adjusting bolt 26 from the nut 26a is adjusted as appropriate so that the relative positions in the plate thickness direction of the metal plates 1 and 2 are adjusted so as not to cause a mistake.
[0036]
In this state, argon gas is continuously fed to the gas supply flow path 23b of the backing material 23, and the argon gas flowing into the groove 23a from the communication hole 23c is interposed between the metal plates 1 and 2 and the groove 23a. The gap is held in an inert gas atmosphere, and the groove portions of the metal plates 1 and 2 are TIG welded from the side of the welding surface where the backing material 23 is not disposed.
[0037]
After the TIG welding of the metal plates 1 and 2 is completed, the screwing of the nut 24a and the support fastening bolt 24 is released, and the fastening of the screw hole 23d and the backing material fixing bolt 25 is released. The bolts 24 and 25 are extracted from the first support 21, and the first support 21 and the second support 22 are removed from the metal plates 1 and 2.
[0038]
As described above, in the metal plate support device shown in FIGS. 1 to 4, the backing material fixing bolt 25 inserted into the second support 22 on the welding surface side is screwed to the backing material 23. The backing material 23 can be supported from the welding construction surface side.
[0039]
In addition, since the adjustment bolt 26 is screwed onto the second support 22 so that the tip of the adjustment bolt 26 abuts the metal plates 1 and 2, the position of the metal plates 1 and 2 is set from the welding surface side. be able to.
[0040]
Therefore, after joining the groove parts of the metal plates 1 and 2 adjacent to the left and right, the fastening of the bolts 24 and 25 is released, and the first support 21 on the anti-welding surface side of the metal plates 1 and 2 is released. By pulling upward, the corner liner 12 having a lining structure as shown in FIG. 6 can be formed.
[0041]
Furthermore, since the argon gas fed to the gas supply flow path 23b of the backing material 23 is guided from the communication hole 23c to the groove 23a facing the groove portion of the metal plates 1 and 2, the metal plates 1 and 2 The gap between the groove portion and the backing material 23 can be reliably maintained in an inert gas atmosphere.
[0042]
In addition, the metal plate supporting apparatus of the present invention is not limited to the above-described embodiment, and the present invention is applied to inert gas shield welding other than TIG welding, and the scope not departing from the gist of the present invention. Of course, changes can be made.
[0043]
【The invention's effect】
As described above, according to the metal plate support device of the present invention, the following various excellent effects can be obtained.
[0044]
(1) In any of the metal plate support devices according to claim 1 or 2 of the present invention, the backing material fixing bolt inserted through the second support on the welding surface side is screwed into the backing material. Therefore, the backing material can be supported from the welding surface side, and the tip of the adjustment bolt screwed to the second support is brought into contact with the metal plate. Position setting can be performed from the welding construction side.
[0045]
(2) In the metal plate supporting device according to claim 2 of the present invention, the groove that faces the inert gas to the groove portion of the metal plate through the gas supply passage and the communication hole of the backing material Therefore, the gap between the groove portion of the metal plate and the backing material can be reliably maintained in an inert gas atmosphere.
[Brief description of the drawings]
FIG. 1 is a partially cut perspective view showing an example of an embodiment of a metal plate supporting apparatus of the present invention.
FIG. 2 is an overall perspective view showing an example of an embodiment of a metal plate support device of the present invention.
3 is a partial cross-sectional view showing a fastening state of the first support and the second support in FIGS. 1 and 2. FIG.
4 is a partial cross-sectional view showing a state in which the backing material is fixed to the second support in FIGS. 1 and 2. FIG.
FIG. 5 is a partially cut perspective view showing an example of a conventional metal plate support device.
FIG. 6 is a partial sectional view showing an example of a lining structure of a liquefied gas storage tank.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Metal plate 2 Metal plate 21 1st support body 22 2nd support body 23 Backing material 23a Groove 23b Gas supply flow path 23c Communication hole 24 Support body fastening bolt 25 Backing material fixing bolt 26 Adjustment bolt

Claims (2)

A first support disposed on the anti-welding surface side of the metal plate to be butt-welded, a second support disposed on the welding surface side of the metal plate to be butt-welded, A backing material that covers a weld groove portion of the metal plate to be welded on one side from the side opposite to the welding surface and that has a groove extending opposite the weld groove portion; and is inserted into the second support and A support fastening bolt that can be screwed into the first support, a backing material fixing bolt that is inserted through the second support and can be screwed into the backing material, and a second support. And a metal plate support device, characterized in that the metal plate support device is provided with an adjusting bolt whose tip can be brought into contact with the welding surface of the metal plate to be butt welded. The metal plate support device according to claim 1, wherein a gas supply flow path is provided inside the backing material, and a communication hole connected to the groove is formed from the gas supply flow path.

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