JP5756276B2 - Gap adjustment device for tank circumferential welding rail - Google Patents

Description

  The present invention relates to a rail for circumferential welding of a tank that guides an automatic welding machine that circumferentially welds a side plate of a tank, and in particular, between fixed rails formed when a fixed rail having a predetermined length is attached in the circumferential direction of the tank. The present invention relates to a gap adjusting device for a rail for circumferential welding of a tank capable of adjusting a gap.

  Double shell tanks that contain LNG, etc., build the bottom and sides of the outer tub on the concrete substrate, then build the outer tub roof and inner tub roof in the outer tub. It is constructed by lifting and fixing the outer tank roof to the upper edge of the side surface of the outer tank, and then building the side surface of the inner tank (Patent Documents 1 and 2).

  The side surfaces of the inner and outer tanks are welded while arranging the side plates in the circumferential direction on the bottom surface, and the side plates are sequentially arranged on the side plates, and the inner and outer groove portions between the upper and lower side plates are surrounded by an automatic welding machine. Built by welding.

  FIG. 6 shows a state in which the side plates 10 arranged in the circumferential direction are circumferentially welded by the automatic welding machine 11. FIG. 6 shows a state in which the side plates 10a, 10b, and 10c are arranged in the upper and lower three stages and are circumferentially welded. The intermediate side plate 10b is arranged on the lower side plate 10a, and the groove portion is welded. The upper side plate 10c is temporarily fixed and attached to the intermediate side plate 10b, and the peripheral welding rail 13 having the rack groove is attached to the upper side plate 10c. A state in which the groove 14 at the upper end of the side plate 10 b and the lower end of the upper side plate 10 c is circumferentially welded by the automatic welding machine 11 is shown.

  The automatic welding machine 11 TIG-welds the groove portion 14 while running and moving on the circumferential welding rail 13 attached to the side plate 10c, and welds and joins the intermediate side plate 10b and the upper side plate 10c, and the circumferential welding is completed. Then, the side plate 10 is temporarily fixed on the upper side plate 10c, the rail 13 for circumferential welding is attached to the side plate 10, and the automatic welder 11 is set and circumferentially welded. 10 is assembled and the side surface of an outer tank or an inner tank is constructed.

Japanese Patent No. 3752273 JP 2003-10968 A JP 2000-24792 A

  This double shell tank is a large tank having a diameter of about 80 m, and the circumference welding rail 13 has a circumference of several hundreds m. However, the circumference welding rail 13 itself has a constant length L, For example, it is formed by sequentially connecting 2 m fixed rails 13s.

  7 (a) and 7 (b) show an example in which the fixed rail 13s is connected in the circumferential direction to form a circumferential welding rail 13. The circumferential welding rail 13 is provided on the inner and outer circumferences of the side plate 10. FIG. The fixed rails 13s are sequentially connected along the line. However, as shown in FIG. 7B, the circumferential length of the circumferential welding rail 13 does not become an integral multiple of the 2 m fixed rail 13 s, and the gap Lo, which is less than the length (2 m) of the fixed rail 13 s, Li is generated. In this case, if the rails are cut and connected to a length corresponding to the gaps Lo and Li, the gaps Lo and Li can be filled, but the thickness of the side plate is sequentially reduced in the height direction. Since the circumferential length of the circumferential welding rail 13 is also different, if the fixed rail 13s is cut each time, there is a problem that a large amount of rail ends are generated.

  Accordingly, an object of the present invention is to solve the above-described problem and to adjust the gap between the fixed rails generated when the peripheral welding rail having a predetermined length is attached to the inner and outer peripheries of the tank side plate. It is to provide an adjusting device.

The invention of claim 1 in order to achieve the above object, along the side plates arranged in the circumferential direction, freely and with a height adjustably provided detachably certain length of the fixed rail, the fixed rail, a circumferential When connecting circumferentially to the groove of the lower edge of the side plate and the upper edge of the existing side plate under the side plate by running the automatic welding machine with the rail for circumferential welding by sequentially connecting in the direction And a gap adjusting device for the circumferential welding rail of the tank capable of adjusting the gap formed by the difference between the fixed rail connection length when the fixed rail is sequentially connected in the circumferential direction and the circumferential length of the circumferential welding rail. In the side plate located in the gap between the fixed rails, a rail pedestal is detachably and height-adjustable, and the adjustment rail is connected to the rail pedestal in the circumferential direction to connect to the left and right fixed rails. Of tanks characterized by being mounted movably A gap adjusting device for welding rails.

  In the invention of claim 2, the right or left end of the adjustment rail is connected to one of the opposing fixed rails, and the automatic welding machine travels from one of the fixed rails to the adjustment rail. 2. The clearance gap between the peripheral welding rails of the tank according to claim 1, wherein the adjustment rail is moved and connected to the other fixed rail facing the other, and the automatic welding machine is moved from the adjustment rail to the other fixed rail. It is an adjustment device.

  According to a third aspect of the present invention, the rail cradle is provided with a mounting plate having elongated holes formed on both ends of a fixing groove-type support material that is detachably mounted on the side plate, and bolt nuts in the elongated holes of the upper and lower mounting plates. The gap adjusting device for a rail for circumferential welding of a tank according to claim 1 or 2, wherein a hat-type support leg that supports the adjusting rail is provided movably.

  According to a fourth aspect of the present invention, a fixing groove-type support material is formed with a coupling hole for inserting a coupling piece welded and fixed to the side plate, the coupling hole is inserted into the coupling piece, and the coupling hole is passed through. 4. The clearance adjustment device for a rail for circumferential welding of a tank according to claim 3, wherein a rail holder is detachably fixed to the side plate by inserting a gold arrow into a tightening hole of the coupling piece protruding from the fixing groove type support material. .

  According to the invention of claim 5, height adjustment bolts are provided on the upper and lower surfaces of the fixing groove type support material located in the coupling hole, and when the coupling piece is inserted into the coupling hole, the height adjustment bolts are vertically adjusted. 5. The clearance adjustment device for the rail for circumferential welding of the tank according to claim 4, wherein the vertical mounting position of the rail pedestal to the side plate is adjusted by screwing each of them to contact with the coupling piece.

  According to the present invention, a rail pedestal is detachably provided on a side plate located in a gap generated when a circumferential welding rail is formed by sequentially arranging fixed rails in the circumferential direction, and the adjustment rail is provided on the rail pedestal. By mounting so that it can move in the circumferential direction, even if there is a difference in the gap between the fixed rails, the gap can be filled by the movement of the adjustment rail, and the automatic welding device can run smoothly and automatically. To demonstrate.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one embodiment of this invention, (a) is a top view, (b) is a front view, (c) is the sectional view on the AA line of (b). It is an assembly perspective view which shows the state which attaches the clearance gap adjustment apparatus of this invention shown in FIG. 1 to the side plate of a tank. It is the perspective view which attached the clearance gap adjustment apparatus of FIG. 2 to the side plate of the tank. It is a figure which shows the state which connects the rail for adjustment of the clearance gap adjustment apparatus of this invention to a fixed rail. In this invention, it is an assembly perspective view which shows the state which attaches a fixed rail to a side plate. It is a perspective view which shows the state which attaches a rail to the side plate of a tank side surface, and performs circumferential welding with an automatic welding apparatus. It is a figure explaining the clearance gap formed between fixed rails when a fixed rail is attached to the inside and outside of the side plate of a tank side surface.

  A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

  First, a structure for detachably attaching the fixed rail 13s to the side surface 10 will be described with reference to FIG.

  In the circumferential direction of the side plate 10, a coupling piece 16 having a trapezoidal shape and a fastening hole 15 formed in the center is attached at a predetermined interval by welding. By fitting the coupling hole 21 of the fixing groove-type support material 20 into the coupling piece 16 and inserting the wedge-shaped gold arrow 17 into the fastening hole 15 of the coupling piece 16, the fixing groove-type support material 20 is fixed. The side surface 10 is detachably fixed. In this way, by fixing the fixing groove-type support member 20 with the joining piece 16 and the gold arrow 17, the fixing groove-type support member 20 is bent and becomes a shape along the arc shape of the side plate 10.

  The coupling hole 21 formed in the fixing groove-type support member 20 is formed sufficiently larger than the width and thickness of the coupling piece 16, and is located above and below the fixing groove-type support member 20 positioned in the coupling hole 21. Height adjustment bolts 22, 22 are provided.

  The fixing groove-type support member 20 is formed about twice as long as the fixed rail 13s, and support legs 24 for fixing the fixing rail 13s with screws 23 are attached to the fixing groove-type support member 20 at appropriate intervals. It has been.

  A rack groove 18 is formed in the fixed rail 13s, and a pinion (not shown) provided in the automatic welding apparatus 11 is connected to the rack groove 18 while guiding the traveling of the automatic welding apparatus 11 described in FIG. The running position can be detected by meshing.

  The fixing rail 13 s is attached to the side surface 10 by fitting the coupling hole 21 of the fixing groove-type support material 20 into the coupling piece 16 and inserting the gold arrow 17 into the fastening hole 15 of the coupling piece 16 protruding from the coupling hole 21. Then, the fixed rail 13s is attached to the support leg 21 provided on the fixing groove-type support member 20 with screws 23, and the upper and lower sides of the fixed rail 13s are adjusted so that the height of the fixed rail 13s becomes a predetermined height. The height of the fixing groove type support material 20 with respect to the side plate 10 is adjusted by adjusting the screwing amounts of the height adjusting bolts 22 and 22, and the gold arrow 17 is further inserted and fixed after the adjustment.

  In this way, a plurality of fixing groove-type support members 20 are attached along the circumferential direction of the side plate 10, and the circumferential fixing rails 13s attached to the support legs 24 of the fixing groove-type support member 20 are appropriately angle steel. Connect with the formed joint so as to be integrated.

  Similarly, the circumferential welding rail 13 is formed in the circumferential direction of the side plate 10 by sequentially connecting the fixing rails 13s to the circumferential direction of the side plate 10 via the fixing groove-type support member 20, as described with reference to FIG. Since the connection length of the fixed rail 13s is different from the circumferential length of the circumferential welding rail 13, gaps Li and Lo that are shorter than the fixed rail 13s are generated even if the fixed rail 13s is connected in the circumferential direction.

  The gaps Li and Lo are more than 0 m and less than 2 m when the fixed rails 13 s having a length of 2 m are sequentially connected. However, the gaps Li and Lo are fixed to have a length of 2 m so that the gaps Li and Lo are about 1 m. Instead of the rail 13s, a fixed rail 13s having a length of 1 m is connected so that the gaps Li and Lo are set to about 1 m.

  In the present invention, the gap adjusting device 25 is attached to the side plate 10 located in the gap of about 1 m, and the circumferential welding rail 13 is formed so that the automatic welding apparatus 11 described in FIG. It is a thing.

  FIG. 1 shows a gap adjusting device 25 according to the present invention.

  In FIG. 1, reference numeral 26 denotes a rail base that is detachably attached to the side plate 10, a fixing groove-type support member 30 having the same cross-sectional shape as the fixing groove-type support member 20 described with reference to FIG. 5, and its fixing groove. It comprises an attachment plate 35 attached to the upper and lower ends of the left and right ends of the mold support member 30 and a hat-type support leg 34 attached to the attached attachment plate 35 so as to be movable.

  The length of the fixing groove-type support member 30 is approximately 90 cm shorter than the gap of about 1 m formed between the fixed rails 13 s. 16 is formed, and height adjustment bolts 32 and 32 are provided on the upper and lower surfaces of the fixing groove-type support member 30 located in the connection hole 31. The height adjusting bolts 32, 32 are provided by welding nuts 33, 33 to the upper and lower sides of the fixing groove-type support member 30 and screwing the height adjusting bolts 32, 32 to the nuts 33, 33.

  An elongated hole 36 is formed in the mounting plate 35 in parallel with the fixing groove-type support member 30, and a hat-type support leg 34 is provided across the upper and lower mounting plates 35, 35. The adjustment rail 13 t is attached to the pedestal surface of the hat-type support leg 34 with the screw 23 while being attached with the bolt nut 37 through the long hole 36. A rack groove 18 is formed in the adjustment rail 13t in the same manner as the fixed rail 13s.

  At the upper end of the hat-type support leg 34, a hook 38 that engages with the upper mounting plate 35 and restricts the vertical position of the hat-type support leg 34 is provided. Support plates 39 in contact with the side plate 10 are provided on both sides of the fixing groove-type support member 30 on the side in contact with the side plate 10.

  An example of fixing the gap adjusting device 25 shown in FIG. 1 to the side plate 10 will be described with reference to FIGS.

  The coupling piece 16 is welded to the side plate 10 located in the gap, and the coupling formed on the fixing groove type support member 30 of the rail cradle 26 is the same as the mounting of the stationary rail 13s in FIG. The hole 31 is fitted into the joining piece 16, the gold arrow 17 is inserted into the tightening hole 15, and the adjustment rail 13 t is attached to the pedestal surface of the hat-type support leg 34, and then the height of the rail cradle 26 is adjusted by the height adjustment bolts 32 and 32. After adjusting the height, the gold arrow 17 is further inserted and fixed.

  FIG. 4 shows a state in which the gap adjusting device 25 is attached to the side plate 10 of the gap between the fixed rails 13s.

  Here, it is assumed that the automatic welding apparatus 11 described in FIG. 6 performs TIG welding on the groove portion at the lower edge of the side plate 10 while moving to the left side from the right fixed rail 13s as viewed in FIG. At this time, the bolt nut 37 that attaches the hat-type support leg 34 to the mounting plate 35 is loosened, the hat-type support leg 34 and the adjustment rail 13t attached to the hat-type support leg 34 are moved, and the adjustment rail is moved. The right end of 13t is joined to the right fixed rail 13s, and in that state, the fixed rail 13s and the adjustment rail 13t are joined by the joint 40 made of angle steel, and the bolt nut 37 is further tightened to tighten the adjustment rail 13t. To fix. At this time, since the hook 38 that engages with the attachment plate 35 is provided at the upper end of the hat-type support leg 34, the vertical position of the adjustment rail 13t during movement does not shift.

  By joining the adjustment rail 13t to the fixed rail 13s in this way, the automatic welding apparatus 11 (see FIG. 6) can be transferred from the fixed rail 13s to the adjustment rail 13t. Thereafter, if the automatic welding apparatus travels to the center of the adjustment rail 13t, that is, between the hat-type support legs 34, 34, automatic welding is stopped, and the adjustment rail 13t and the fixed rail 13s are joined. The joint 40 is removed, the bolts and nuts 37 are loosened, and the pinion of the automatic welding apparatus is supported on the side plate 10 with a hanging tool while being engaged with the rack groove 18, and only the adjustment rail 13t is moved to the left side and fixed on the left side. It joins with the joint 40 while joining to the rail 13s.

  If the adjustment rail 13t is moved to the left side and joined in this way, it becomes possible to resume automatic welding by the automatic welding machine that is travel-supported by the adjustment rail 13t and move to the fixed rail 13s. Thus, circumferential welding in which a gap between the fixed rails 13s is filled is possible.

  2 to 5, the circumferential welding of the outer surface of the side plate 10 has been described. Similarly, the fixed rail 13s is attached to the inner surface, and the gap adjusting device 25 is attached to the gap formed between the fixed rails 13s. The adjustment rail 13t is moved to guide an automatic welding apparatus for circumferential welding.

  When the circumferential welding of the inner and outer surfaces of the side plate 10 is completed, a new side plate 10 is temporarily fixed in the circumferential direction on the side plate 10, and circumferential welding is performed in the same manner as described above to construct the side surfaces of the outer tank and the inner tank. Go.

  As described above, according to the present invention, when the side plate 10 is arranged in the circumferential direction and the fixed rail 13s is attached along the side plate 10 to form the circumferential welding rail 13, the connection length of the fixed rail 13s The gap formed by the difference in the circumferential length of the circumferential welding rail 13 can be filled with the adjustment rail 13t movable in the circumferential direction, and the automatic welding apparatus can be easily guided to perform circumferential welding. .

DESCRIPTION OF SYMBOLS 10 Side plate 13 Rail for circumference welding 13s Fixed rail 13t Adjustment rail 16 Coupling piece 17 Gold arrow 26 Rail base 30 Fixing groove type support material 31 Coupling hole 35 Mounting plate 34 Hat type support leg 36 Slotted hole

Claims (5)

Along the side plates arranged in the circumferential direction, and removably certain length of the fixed rail with height adjustable providing, the fixed rail, successively in the circumferential welding rails formed by connecting in a circumferential direction, When running the automatic welding machine with the circumferential welding rail and circumferentially welding the groove of the lower edge of the side plate and the upper edge of the existing side plate below the side plate, A clearance adjustment device for a circumferential welding rail of a tank capable of adjusting a gap formed by a difference between a fixed rail connection length and a circumferential length of a circumferential welding rail, wherein a rail is attached to a side plate located in the clearance between the stationary rails. Circumferential welding of a tank, characterized in that a cradle is detachable and height-adjustable, and an adjustment rail is attached to the rail cradle so as to be movable in the circumferential direction to connect to the left and right fixed rails Rail clearance adjustment device.   Either the left or right end of the adjustment rail is connected to one of the opposing fixed rails, and the automatic welding machine travels from one fixed rail to the adjustment rail, and then the adjustment rail is moved. 2. A gap adjusting device for a circumferential welding rail for a tank according to claim 1, wherein the automatic welding machine is moved to move from the adjusting rail to the other fixed rail.   The rail cradle mounts mounting plates with elongated holes formed on both ends of a fixing groove type support material that is detachably attached to the side plate, and the adjustment rails are inserted into the elongated holes of the upper and lower mounting plates via bolts and nuts. The clearance adjustment apparatus of the rail for circumferential welding of the tank of Claim 1 or 2 comprised so that the hat-type support leg which supports can be moved is provided.   The fixing groove type support material is formed with a coupling hole through which the coupling piece welded and fixed to the side plate is inserted, the coupling hole is inserted into the coupling piece, and the fixing groove type support material is passed through the coupling hole. The clearance adjustment apparatus of the rail for circumferential welding of the tank of Claim 3 which inserts a gold arrow in the fastening hole of the protruding coupling piece, and a rail base is detachably fixed to a side plate.   Height adjustment bolts are provided on the upper and lower surfaces of the fixing groove type support material located in the coupling hole, and when the coupling piece is inserted into the coupling hole, the upper and lower height adjustment bolts are respectively attached to the coupling piece. The clearance adjustment apparatus for the rails for circumferential welding of a tank according to claim 4, wherein the upper and lower mounting positions of the rail cradle to the side plate are adjusted by screwing to contact.