JP6008530B2 - Submerged arc welding equipment for thick plates - Google Patents

Description

  The present invention relates to a submerged arc welding facility for thick plates for welding a material to be welded made of a thick plate such as a body plate of a large tank, for example, in the field in a horizontal direction along a groove portion.

  As a flux receiving device in a conventional submerged arc welding facility, for example, there is one in which a thin endless elastic belt is wound around a pair of sprockets arranged before and after a welding line. In these, the rotation axis of the sprocket is arranged substantially parallel to the surface of the material to be welded and the peripheral end surface of the belt is brought into contact with the material to be welded (FIGS. 4 and 5 of Patent Document 1), and the rotation of the sprocket The shaft is arranged in a direction substantially parallel to the surface of the material to be welded and perpendicular to the welding line, and the outer peripheral surface of the belt is brought into contact with the material to be welded (FIGS. 1 and 2 of Patent Document 1), There is one in which the rotation axis of the sprocket is arranged with an inclination angle with respect to the surface of the material to be welded and the belt edge is brought into contact with the material to be welded (FIG. 5 of Patent Document 2). In addition, an endless moving member is wound around a pair of sprockets whose rotating shaft is substantially parallel to the surface of the material to be welded and orthogonal to the welding line, and a plurality of metal receiving plates are arranged at intervals on the endless moving member. Further, there is a composite (FIG. 7 of Patent Document 3) in which a heat-resistant elastic belt is wound around the outer periphery of a metal backing plate.

JP-A-53-112240 Japanese Patent Laid-Open No. 11-58018 Japanese Patent No. 3916381

  Although the above conventional configuration can cope with a straight line or an arc-shaped weld line having a constant curvature, it is difficult to follow a combined weld line such as a straight line-curve or a weld line whose curvature radius is different or changes. Thus, there is a problem that the flux may not be held well.

  An object of the present invention is to solve the above-mentioned problems and to provide a submerged arc welding equipment for a thick plate that can satisfactorily maintain a flux even if the welding line has a change.

The invention according to claim 1 is a submerged arc welding facility for a thick plate that welds by supplying a flux to a groove portion formed in a butt portion of a workpiece to be welded arranged above and below,
To a welding cart that can move along a guide member installed parallel to the groove,
A welding torch for welding the groove,
A flux feeding / collecting device that feeds and collects flux to the groove,
Comprising a flux receiver device holding supplied to the groove portion flux, and
The flux receiver is
A conveyor support that is supported on the welding carriage so as to be close to and away from the material to be welded;
A pressing drive device capable of biasing the conveyor support to the material to be welded;
To the conveyor support, anda pivotally supported flux receiver conveyor in a predetermined range via a pivot shaft in the vertical direction,
The flux receiving conveyor is disposed at the front and rear ends of the conveyor frame in the welding direction and is supported by a pair of front and rear wheels rotatably supported around a vertical shaft portion, and is wound around these wheels and covered under the groove portion. A thick elastic belt pressed against the welding material, and a plurality of belts installed at regular intervals along the welding line direction between the pair of front and rear wheels and respectively pressing the elastic belt against the welded material side by pressing rollers A pressing tool,
Provided with a flux fall prevention tool that closes the gap between the elastic belt and the material to be welded in front of the welding line direction of the flux receiving conveyor,
The flux fall prevention device is supported by a swing arm supported rotatably on a shaft portion of a wheel, and a free end portion of the swing arm so as to be swingable around an axis parallel to the shaft portion. A receiving plate that covers the space between the elastic belt and the material to be welded, and an urging member that urges the receiving plate to rotate toward the material to be welded .

  According to the first aspect of the present invention, the conveyor frame supported by the conveyor support body through the swing shaft is urged against the material to be welded by the press drive device, thereby moving the conveyor frame forward and backward in the welding direction. Since the elastic belt wound around the pair of arranged front and rear wheels is pressed against the material to be welded, and further, the elastic belt between the wheels is pressed against the material to be welded via the pressing rollers by a plurality of belt pressing tools. Even if the surface of the material to be welded changes from a flat surface to an arc surface or from an arc surface to a flat surface between arc surfaces having different curvatures, an elastic belt wound between the front and rear wheels is attached to the material to be welded. In this case, the flux can be well maintained in the groove portion without causing a gap, and open air due to the fall of the flux can be prevented in advance.

Further , a swing arm is rotatably supported on the shaft portion of the front wheel, and a receiving plate is swingably provided on the swing arm via the swing shaft, and the receiving plate is welded by a biasing member. By rotating and energizing to the material side, the receiving plate can oscillate following the change of the surface of the material to be welded, and cover the space between the surface of the material to be welded and the elastic belt. The flux can be effectively prevented from falling.

It is a whole front view which shows the Example of the submerged arc welding equipment which equipped with the flux filling apparatus which concerns on this invention. It is a schematic front view of a submerged arc welding equipment. It is a top view of a submerged arc welding equipment. (A) and (b) show a front drive trolley, (a) is a whole side view, and (b) is an enlarged side view of a welding torch. It is a front view which shows a trolley | bogie connection tool. (A) and (b) show a flux feeding / recovery device, (a) is a top view, and (b) is a front view. It is a top view which shows a welding torch, a flux receiving conveyor, and a flux pushing machine. (A) and (b) show a welding torch, a flux receiving conveyor, and a flux pushing machine, (a) is a sectional view in side view, and (b) is an enlarged view of part A shown in (a). (A) and (b) show a flux receiving conveyor, (a) is a top view, and (b) is a BB sectional view shown in (a). (A) (b) is a side view which shows a welding state, (a) shows the welding state of a groove part back | inner side, (b) shows the welding state of a groove part opening side.

[Example 1]
Embodiments of the present invention will be described below with reference to the drawings.
(Overall structure)
This submerged arc welding equipment for thick plates (hereinafter referred to as welding equipment) includes, for example, a joint between an upper body plate TU and a lower body plate TD, which is a material to be welded to a thick plate constituting a large-diameter pressure tank such as an oil liquefaction plant. The upper and lower body plates TU, TD are intended to be thick plates having a thickness of 40 mm or more and 120 mm or less, for welding in the vicinity of the installation site along the weld line WL. Then, for example, an asymmetrical groove shape (a symmetric V shape is also possible) formed along the weld line WL along the joint between the upper and lower body plates TU and TD is welded sideways. Of course, it is not restricted to the upper and lower body plates TU and TD of the pressure tank.

  As shown in FIGS. 1 to 3, the welding equipment includes a traveling rail (guide member) 11 attached to the upper body plate TU by a rail holder 12, and a preceding driven carriage guided and moved by the traveling rail 11. 13F and a welding cart 13 consisting of a trailing drive cart 13R, and the preceding driven cart 13F and the trailing drive cart 13R are connected by a cart connector 13C that can be adjusted and bent freely. A flux feeding / recovering device 19 that sucks and collects the flux and sends it out is mounted on the preceding driven carriage 13F. Further, a torch support device 15 that supports the welding torch 14, a wire reel 16 that feeds the welding wire Wi, a flux receiving device 17 that includes a flux receiving conveyor 50, and a flux in the groove portion WG. A flux filling device 20 for filling the vehicle, a travel drive device 23 and a control panel 18 are mounted.

  As shown in FIG. 5, the truck connector 13C is formed in a rod shape, and in order from the front end to the rear end side, is connected to the locking portion of the preceding driven carriage 13F in order, and a predetermined range. The ball joint 72 that can be bent freely, the screw shaft portion 73 that can be adjusted in length, the rack and pinion type length adjusting device 74 with a fixing device, and the trailing device connected to the locking portion of the trailing drive carriage 13R. A locking tool 75 is provided. Therefore, it is possible to arbitrarily adjust the distance and the attitude of the preceding driven carriage 13F and the trailing drive carriage 13R in the welding line WL direction by the carriage connecting tool 13C.

(Travel rail and welding cart)
As shown in FIGS. 1 to 4, a traveling rail 11 having a cylindrical cross section is formed by a rail holder 12 having an attracting magnet 12 a and an attracting pad 12 b above a predetermined distance of the weld line WL on the upper torso TU. It is installed in parallel with the surface of the plate TU and in parallel with the groove portion WG.

  The preceding driven carriage 13F and the trailing drive carriage 13R are two pairs of front and rear traveling rollers 22F, which sandwich the traveling rail 11 from above and below, on the rear surface of each carriage frame 21F, 21R disposed at the front of the traveling rail 11. Each of the traveling rollers 22F and 22R is supported by a traveling roller 22Rd, which is disposed at the upper part of the front portion of the trailing drive carriage 13R. It is comprised by the drive roller connected. Further, the bogie frames 21F and 21R are rotatably supported by support rollers 25F and 25R that roll on the surface of the upper body plate TU at lower ends of leg members 24F and 24R that extend downward from the back side of the upper body plate TU. Thus, the vertical postures of the bogie frames 21F and 21R are maintained.

(Advance driven cart and flux feeding / collecting device)
As shown in FIG. 6, the flux feeding / recovering device 19 mounted on the preceding driven carriage 13F includes a flux supply hopper 83 having a hygroscopic cyclone tank 82 to which a recovery duct 81 is connected, and the flux supply hopper 83. An inclined supply chute 84 connected to the lower portion of the air, an air suction machine (exayer gun) 85 interposed in the recovery duct 81, and a dust removal filter 87 to which an exhaust duct 86 led out from the cyclone tank 82 is connected. It has. The components such as the flux supply hopper 83, the supply chute 84, the air suction device 85, and the dust removal filter 87 with the cyclone tank 82 are installed in the preceding driven carriage 13F, and the suction port side of the recovery duct 81 is the trailing drive carriage 13R. It is supported by.

  The recovery duct 81 has an inlet opened above the rear part of the flux receiving conveyor 50, and an outlet connected to the upper outer peripheral part by a casing 82 a of a cyclone tank 82, and is supplied to an air suction machine 85 interposed in the intermediate part. The flux is sucked and collected in the cyclone tank 82 by the pressurized air. In the cyclone tank 82, it is swung in the casing 82a, is naturally dropped, and is sent from the outlet 82b at the lower end to the flux supply hopper 83. Further, the moisture-excluded exhaust air separated from the flux is exhausted from the exhaust pipe disposed at the axial center position of the cyclone tank 82 to the exhaust duct 86 and exhausted through the dust removal filter 87.

  Further, the flux supply hopper 83 is supported by the preceding driven carriage 13F so that the position of the flux supply hopper 83 can be adjusted in the vertical direction, and the connection portion leading to the supply chute 84 is configured to be extendable and retractable, thereby adjusting the height of the flux supply hopper 83. The supply amount of the flux supplied from the supply chute 84 to the upper vicinity of the front portion in the weld line WL direction of the welding torch 14 can be adjusted according to the welding speed. Further, when the flux reaches the outlet of the supply chute 84, the supply of the flux is controlled to stop automatically.

  Therefore, the flux recovered by the recovery duct 81 using the air suction machine 85 using a constant air pressure is sent to the cyclone tank 82, and the flux dropped from the cyclone tank 82 is supplied from the flux supply hopper 83 to the supply chute 84. Since it is supplied by using natural fall, the flux can be stably supplied to the groove portion WG with a simple structure, without being affected by the suction air pressure, just by adjusting the height of the flux supply hopper 83. can do.

[Rear drive cart]
As shown in FIGS. 1, 2, and 4, the trailing drive carriage 13 </ b> R is supported by a carriage frame 21 </ b> R so that a wire reel 16 is rotatably supported by a support material 26 at the rear upper part, and a control panel 18 is attached to a bracket 27 at a lower rear part. Is supported so as to be rotatable around a vertical axis.

Further, a lower frame (support frame) 28 installed at the lower portion of the trailing drive carriage 13R has a lifting screw shaft and an electric motor, and is capable of moving up and down in the height direction (Y-axis direction). 31 and a welding withdrawal / retraction mechanism 32 having a withdrawal / retraction screw shaft and an electric motor and retracting / retracting in the (welding angle) direction (X-axis direction) inclined from the lower rear side to the upper front side. The hanging plate 33 is supported. Further, at the lower end portion of the suspending plate 33, a vertical tilt adjusting portion 34 that can be rotated about a horizontal axis HL and a horizontal direction (welding line) about an axis VL of a vertical swing shaft 35a. A torch mount 36 is installed via a left / right tilt adjustment section 35 that can swing in the front / rear direction of WL). The height adjusting mechanism 31 and the welding retracting mechanism 32 are operated by the control panel 18, and the fixing / releasing operation of the vertical tilt adjusting unit 34 and the left / right tilt adjusting unit 35 is manually operated via a lock handle. .
[Welding torch]
As shown in FIGS. 4 and 7, the torch support device 15 is provided with a wire feed motor 37 and a speed reducer 38 on a torch mount 36, and a bearing 39 that is externally fitted to an output shaft 38 a of the speed reducer 38. Further, a torch support body 42 having a plurality of wire guide rollers 41 is supported so as to be able to swing up and down, and the welding torch 14 is attached to the front portion of the torch support body 42. A wire driving roller 41D for introducing the welding wire Wi is attached to the output shaft 39a of the speed reducing device 38 so as to face the upper side of the wire guide roller 41. Although not shown, a welding power cable is connected to the welding torch 14 from the control panel 18, and the welding wire Wi fed from the wire reel 16 is fed by the wire guide roller 41 and the wire drive roller 41D of the torch support 42. It is introduced and fed to the wire introduction hole 14 a of the welding torch 14.

  The groove portion WG is, for example, a groove portion WG having a small inclination angle on the lower body plate TD side and a large inclination angle of the upper body plate TU, as shown in FIGS. 4 (a) and 7. The welding torch 14 is set in a posture along the X-axis direction that is inclined forward α from the direction perpendicular to the welding line WL and inclined upward by β.

[Flux filling equipment]
The flux filling device 20 includes a flux guide plate 43 provided on the welding torch 14, a flux pusher 40 attached to the torch support 42, and a flux guard plate 52 provided on the flux receiving conveyor 50. Yes.

(Flux guide plate)
As shown in FIGS. 4B and 7, the flux guide plate 43 is used in an initial to intermediate welding process shown in FIG. 10A in which welding is performed from the back end to the intermediate portion of the groove portion WG. And is detachably provided on the welding torch 14 via a mounting bracket 44. The flux guide plate 43 is arranged in parallel or substantially parallel to the bottom of the welding torch 14 at a predetermined interval, and the flux supplied from the supply chute 84 of the flux feeding / recovering device 19 is passed through the groove WG. Guide to the side. The flux guide plate 43 is formed in a substantially parallelogram shape in plan view, which includes a pair of inner and outer sides parallel to the welding line WL and a pair of front and rear oblique sides substantially parallel to the inclination angle β ° of the welding torch 14. When the innermost part of the groove part WG is welded, the inner side part of the tip is attached so as to penetrate to about half of the depth WGd of the groove part WG.

(Flux pushing machine)
As shown in FIGS. 7 and 8, the flux pusher 40 is used in the initial to intermediate welding process shown in FIG. 10A, and the rotating shaft hole is formed in the frame portion 42 a of the torch support 42. Are attached to the welding torch 14 in parallel with each other through a vertical inclination adjusting tool 47 in which adjustment bolts are fixedly attached to the arc-shaped elongated holes. This flux pushing machine 40 has a plate-like or rod-like pushing member 45 whose tip is disposed in the vicinity of the outside of the welding line WL of the welding torch 14, and an exit / retreat driving device (air) housed in the housing box 46b. Cylinder) 46a is provided with a push-in drive unit 46 that moves the push-in member 45 in and out in a predetermined stroke and a predetermined cycle, and welds from the middle part to the opening of the groove part WG in FIG. 10B. It is comprised so that the whole or the front end side of the pushing member 45 can be removed in the welding process of the intermediate | middle stage-shown late. The pushing-out direction of the pushing member 45 is set to be substantially parallel to the welding torch 14 or to be inclined outwardly from the upper portion as indicated by a virtual line, and the upper and lower body plates TU are arranged at the leading end portion of the pushing member 45 at the protruding position. , TD is set in the vicinity of the surface.
When granular flux (for example, 10 × 48 mesh) is used for the upper and lower body plates TU and TD here, the retracting stroke S of the pushing member 45 is S = 3 to 10 mm. This is because the flux does not move and is not fed to the back of the groove portion WG if the retracting stroke S is less than 3 mm. If the retracting stroke S exceeds 10 mm, the flux flow is disturbed and the flux in the groove portion WG This is because the flux may be non-uniform. In addition, the exit / exit cycle is appropriately 200 to 350 times / minute. This is because the flux may not be smoothly fed into the groove portion WG when the exit / exit cycle exceeds the range of 200 to 350 times / minute or is less than the range.

[Flux receiver]
As shown in FIGS. 8 to 9, the flux receiving device 17 includes a flux receiving conveyor 50 and a flux drop prevention tool 51, and a flux guard plate 52 constituting the flux filling device 20 is detachably provided. .

  A pair of elongate holes 54a in the vertical direction and fixed bolts and nuts fitted to the elongate holes 54a so as to be adjustable in position at the lower end portion of the lower frame 53 hanging downward from the carriage frame 21R of the trailing drive carriage 13R. The height adjustment part 54 for receivers which consists of 54b is provided, and the receiving part support frame 59 is attached to this height adjustment part 54 for receivers so that height adjustment is possible. And the conveyor support body 57 is supported by the receiving part support frame 59 via the guide member 56 so that it can move in and out of the lower body plate TD. Further, the output shaft of a pressing cylinder (pressing drive device) 55 attached to the receiving portion support frame 59 is connected to the conveyor support 57, and the position of the conveyor support 57 can be adjusted in the direction of approaching and separating from the lower body plate TD. It is configured to be able to energize and withdraw. Furthermore, as shown in FIG. 9, a swing shaft 58 is erected on the front end side of the conveyor support 57, and the flux receiving conveyor 50 is supported by the swing shaft 58 so as to be swingable within a predetermined range. Yes.

  The flux receiving conveyor 50 includes a conveyor frame 60 including a pair of upper and lower support plates 60u and 60d, and the upper and lower support plates 60d and 60d are swingably supported by a swing shaft 58. Then, toothed wheels (wheels) 61F and 61R are rotatably supported at both ends in the weld line WL direction between the upper and lower support plates 60u and 60d via shafts 62F and 62R, respectively, and the rear toothed wheel. In the vicinity of the outside of 61R, a tension wheel 63 is rotatably arranged around a vertical axis through a movable member. A toothed elastic belt 64 having a thick wall and teeth formed on the inner surface is wound around the outer peripheral portions of the toothed wheels 61F and 61R and the tension wheel 63. This elastic belt 64 is a thick, resin-made outer peripheral belt disposed on the outer peripheral portion, and a toothed belt that is integrally attached to the inner surface of the outer peripheral belt and has high heat resistance and strength. It has a two-layer structure.

  In addition, a plurality of (four in the figure) belt pressing tools 65 that press the elastic belt 64 against the body plate TD side between the upper and lower support plates 60u and 60d between the toothed wheels 61F and 61R are spaced at regular intervals in the weld line WL direction. Is arranged for each. As shown in FIGS. 8B and 9, the belt pressing tool 65 supports a pressing roller 65b between a pair of guide bodies 65a attached with a predetermined interval between the upper and lower support plates 61u and 61d. A roller support 65d that is rotatably supported via a shaft 65c is slidably fitted in a direction approaching and separating from the lower body plate TD. A screw shaft 65e extending rearward from the roller support 65d is attached, and the screw shaft 65e is slidably passed through a hole in a restriction plate 65f fixed between the upper and lower support plates 61u and 61d. Further, a biasing coil spring (biasing member) 65g is fitted on the screw shaft 65e between the roller support 65d and the restricting plate 65f, and the pressing roller 65b is moved toward the lower body plate TD by the biasing coil spring 65g. Energized. Reference numeral 65h denotes a regulating nut that is attached to the distal end side of the screw shaft 65e and serves as a movement limit of the pressing roller 65b.

  Therefore, the elastic belt 64 can be uniformly pressed to the surface of the curved lower body plate TD without gaps by a plurality of (four in the figure) belt pressing tools 65 installed at regular intervals in the weld line WL direction. The flux can be prevented from dropping in accordance with the curvature and deformation of the surface of the lower body plate TD.

  As shown in FIG. 9, the flux drop prevention tool 51 is provided on a shaft portion 62 </ b> F that supports the toothed wheel 61 </ b> F at the front portion in the weld line WL direction. The flux fall prevention device 51 is supported on a shaft portion 62F so as to be rotatable at the upper part of the upper support plate 60u, and can be fixed at an arbitrary position by a fixing nut 51b, and a swing arm 51a is swung at the tip of the swing arm 51a. A receiving plate 51c supported so as to be swingable via a moving shaft 51e and capable of covering the upper part of a substantially triangular drop space from the outer periphery of the upper surface of the elastic belt 64 to the lower body plate TD, a swinging arm 51a and a receiving plate 51c. And a biasing spring (biasing member) 51d that pivotally biases the receiving plate 51c toward the body plate TD. Therefore, by fixing the swinging arm 51a at a predetermined position close to the lower body plate TD by the fixing nut 51b, the receiving plate 51c is rotated by the spring force of the urging spring 51d to move toward the lower body plate TD. It is possible to effectively prevent the flux from falling by abutting and covering the substantially triangular drop space between the front portion of the elastic belt 64 and the body plate TD.

(Flux guard plate)
The flux guard plate 52 is used in the middle to late welding process shown in FIG. 10B and is detachably attached to the flux receiving conveyor 50. As shown in FIGS. 7 to 9, a flux guard plate 52 is attached to the upper support plate 60u via a plate support member 66 so as to be inclined upward and detachably. For example, the inter-axis distance between the toothed wheels 61F and 61R The toothed wheels 61 </ b> F and 61 </ b> R are formed to have a width approximately equal to the diameter. The inner end edge is disposed so as to contact the inner side portion of the upper support plate 60u, and the leakage of the flux overflowing from the groove portion WG can be regulated to play the role of pushing the flux back to the groove portion WG. .

[Effect of Example]
According to the above embodiment, the flux fed toward the groove portion WG by the flux guide plate 43 of the flux filling device 20 is further moved away from the pushing member 45 by the flux pushing machine 40, and the flux is returned to the back side. Since vibration is applied, even if there is a deep groove WG, the flux can be sufficiently filled, and it can be surely prevented from becoming open air.

  Further, the flux guard plate 52 of the flux filling device 20 can catch the flux spilling from the opening of the groove portion WG to the flux receiving conveyor 50 side, collect the flux to the groove portion WG, and replenish the groove portion WG. can do.

  Further, the flux guide plate 43 and the flux pusher 40 are used when welding the intermediate portion from the back side of the groove portion WG, and the flux guard plate 52 is used when welding the intermediate portion of the groove portion WG from the opening side. Thereby, the deep groove part WG of a thick to-be-welded material is covered deeply with a flux, and submerged arc welding can be performed satisfactorily.

  Furthermore, by urging the conveyor frame 60 supported by the conveyor support body 57 via the swing shaft 58 to the lower body plate TD side by the pressing cylinder 55, the conveyor frame 60 is moved back and forth in the weld line WL direction. The elastic belt 64 wound around the arranged toothed wheels 61F and 61R is pressed against the lower body plate TD, and further, between the toothed wheels 61F and 61R by a plurality of belt pressing tools 65 via the pressing rollers 65b, respectively. Since the elastic belt 64 is pressed against the lower body plate TD, even if the surface of the lower body plate TD changes from a flat surface to an arc surface, or from an arc surface to a plane, between arc surfaces having different curvatures, The elastic belt 64 wound between the toothed wheels 61F and 61R is caused to follow in a close contact state with no gap between the lower body plate TD and the flux is excellent in the groove portion TG. Can be held, it is possible to prevent the open air due to falling flux from occurring.

  Further, the swing arm 51a is rotatably supported on the shaft portion 62F of the front toothed wheel 61F, and the substantially triangular receiving plate 51c is swingable on the swing arm 51a via the swing shaft 51e. By providing and biasing the receiving plate 51c to the lower body plate TD by the biasing spring 51d, the receiving plate 51c swings following the change in the surface of the lower body plate TD without fail. The space between the surface of the plate TD and the elastic belt 64 can be covered, and the flux can be effectively prevented from falling.

WG groove WL welding line
Wi Welding wire TU Upper body plate TD Lower body plate 11 Traveling rail 12 Rail support 13 Welding carriage 13F Preceded driven carriage 13R Trailing drive carriage 13C Dolly connection tool 14 Welding torch 15 Torch support device 16 Wire reel 17 Flux receiving device 19 Flux Feeding / collecting device 20 Flux filling device 21F, 21R Carriage frame 22F, 22R Traveling roller 22D Driving roller 23 Traveling drive device 26 Strut material 31 Welding height adjustment mechanism 32 Welding withdrawal adjustment mechanism 34 Vertical tilt adjustment unit 35 Left and right Tilt adjustment part 36 Torch mount 42 Torch support body 43 Flux guide plate 44 Mounting bracket 45 Pushing member 46 Pushing drive part 47 Vertical tilt adjustment tool 50 Flux receiving conveyor 51 Flux drop prevention tool 52 Flux guard plate 60 Conveyor frames 61F, 61 Toothed wheel 63 tension wheel 64 elastic belt 65 belt pressing tool

Claims (1)

It is a submerged arc welding facility for a thick plate that feeds and welds a flux to a groove portion formed at a butt portion of a workpiece to be arranged above and below,
To a welding cart that can move along a guide member installed parallel to the groove,
A welding torch for welding the groove,
A flux feeding / collecting device that feeds and collects flux to the groove,
Comprising a flux receiver device holding supplied to the groove portion flux, and
The flux receiver is
A conveyor support that is supported on the welding carriage so as to be close to and away from the material to be welded;
A pressing drive device capable of biasing the conveyor support to the material to be welded;
To the conveyor support, anda swingably supported flux receiver conveyor in a predetermined range via a pivot shaft in the vertical direction,
The flux receiving conveyor is disposed at the front and rear ends of the conveyor frame in the welding direction and is supported by a pair of front and rear wheels rotatably supported around a vertical shaft portion, and is wound around these wheels and covered under the groove portion. A thick elastic belt pressed against the welding material, and a plurality of belts installed at regular intervals along the welding line direction between the pair of front and rear wheels and respectively pressing the elastic belt against the welded material side by pressing rollers A pressing tool,
Provided with a flux fall prevention tool that closes the gap between the elastic belt and the material to be welded in front of the welding line direction of the flux receiving conveyor,
The flux fall prevention device is supported by a swing arm supported rotatably on a shaft portion of a wheel, and a free end portion of the swing arm so as to be swingable around an axis parallel to the shaft portion. A thick plate submerged arc , comprising: a receiving plate that covers a space between the elastic belt and the welded material; and a biasing member that biases the receiving plate toward the welded material. Welding equipment.

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