Welding device and welding method for spiral submerged arc welding pipe

Abstract

The invention relates to a welding device and a welding method for a spiral submerged arc welding pipe. The moving platform is slidably mounted on the track, a first driving mechanism is mounted on the moving platform, and the first driving mechanism is configured to drive the moving platform to move along the track; the welding assembly is fixed to the moving platform, and the welding assembly is provided with a welding cantilever; the welding pipe driving device and the movable platform are arranged at intervals in the extending direction perpendicular to the track, the welding cantilever is suspended above the welding pipe driving device, the welding pipe driving device is connected with a second driving mechanism, and the second driving mechanism is configured to drive the welding pipe driving device to rotate. And the welded pipe driving device drives the spiral submerged arc welding pipe to rotate around the axis of the spiral submerged arc welding pipe. The movable platform moves along the track, the spiral submerged arc welding pipe and the welding cantilever are synchronously driven when the movable platform moves, and the butt welding seam on the spiral submerged arc welding pipe can be welded through the welding device.

Description

Technical Field

[0001] The present application relates to the technical field of external weld welding of spiral submerged arc welded steel pipe butt seams, and in particular to a welding device and a welding method for a spiral submerged arc welded pipe. Background Art

[0002] At present, in the continuous production of spiral submerged arc welded pipes, there are usually butt welds of steel strips, which are also known as T-welds or butt welds. In the relevant standards, only welding requirements are put forward for the butt welds of spiral submerged arc welded pipes, that is, welding by submerged arc welding or a combination of submerged arc welding and gas metal arc welding; and inspection by the same acceptance standards as spiral welds, but there is no strict requirement that butt welds are not allowed in spiral submerged arc welded pipes. It should be noted that the butt weld should not be too small from the end of the steel pipe.

[0003] Whether butt welds are allowed in spiral submerged arc welded pipes usually depends on the needs of users. For example, in the production of steel pipes for oil and gas transportation, the quality requirements of steel pipes for oil and gas transportation are relatively high. However, the butt welding equipment of the spiral submerged arc welded pipe production line in the relevant technology only performs single-sided welding on the two connected steel strips, and the single-sided welding part forms the inner weld of the steel pipe when the steel pipe is rolled. Therefore, in order to avoid the quality risks of the butt welds of the steel strips, manufacturers usually adopt the method of completely cutting them off, which will increase the material consumption of spiral submerged arc welding pipes by 2%-5%. If the butt weld steel pipe is to be retained, the spiral weld on the outer wall of the steel pipe needs to be welded; for example, in spiral steel pipes for piles, the spiral steel pipes for piles are generally longer, and some reach 40-90m. Whether it is repairing the spiral weld on the outer wall or welding spiral welded steel pipes for piles that require longer lengths, the welding method is usually to manually carbon arc gouge the grooves on the outer welds of the steel pipes offline. However, almost every steel pipe has a steel strip butt weld, and nearly 5% of the spiral welds themselves have welding defects. It is necessary to repair more welds and use a completely manual welding method. Not only is the labor intensity of the operators high, the production efficiency is low, and the quality is not easy to guarantee. Summary of the invention

[0004] The present application provides a welding device and a welding method for a spiral submerged arc welded pipe, which can solve the technical problem in the related art that a large number of welds are repaired by completely manual welding, which not only has high labor intensity for operators, low production efficiency, but also is difficult to ensure quality.

[0005] In the first aspect, an embodiment of the present application provides a welding device for a spiral submerged arc welded pipe, comprising: a track; a mobile platform, the mobile platform is slidably mounted on the track, the mobile platform is equipped with a first driving mechanism, the first driving mechanism is configured to drive the mobile platform to move along the track; a welding assembly, the welding assembly is fixed to the mobile platform, and the welding assembly is provided with a welding cantilever; a welding pipe driving device, the welding pipe driving device and the mobile platform are spaced apart along an extension direction perpendicular to the track, the welding cantilever is suspended above the welding pipe driving device, the welding pipe driving device is connected to a second driving mechanism, the second driving mechanism is configured to drive the welding pipe driving device to rotate, so that the welding pipe driving device drives the spiral submerged arc welded pipe to rotate around the axis of the spiral submerged arc welded pipe.

[0006] In combination with the first aspect, in one embodiment, the welding assembly includes: a welding column, the welding column is fixed to the mobile platform, a slide rail is installed on one side of the welding column, the slide rail extends along the spacing direction between the welding cantilever and the welding pipe driving device, and the welding cantilever is slidably installed on the slide rail; a third driving mechanism, the third driving mechanism is connected to the welding cantilever, and the third driving mechanism is configured to drive the welding cantilever to move along the slide rail.

[0007] In combination with the first aspect, in one embodiment, the welding cantilever includes: a fixed rod, which is slidably mounted on the slide rail and extends in a direction perpendicular to the extension direction of the welding column, and the fixed rod is provided with a first adjustment slot, and the first adjustment slot extends in the extension direction of the fixed rod; an adjusting rod, which is sleeved on the outer side of the fixed rod, and the adjusting rod is provided with a second adjustment slot corresponding to the first adjustment slot, and the second adjustment slot also extends in the extension direction of the fixed rod, and an adjustment fixing device is provided in the first adjustment slot and the second adjustment slot.

[0008] In combination with the first aspect, in one embodiment, the welding cantilever also includes an adjustment plate, the adjustment plate is equipped with a welding system, the welding system is used to weld spiral submerged arc welded pipes, and the adjustment plate is installed on the side of the adjustment rod away from the welding column; the adjustment plate is equipped with an adjustment member, and the adjustment member is configured to drive the adjustment plate to move axially along the adjustment rod.

[0009] In combination with the first aspect, in one embodiment, the welding device also includes: a welding device, which is installed on a mobile platform and is electrically connected to the welding system; a control cabinet, which is respectively connected to the first drive mechanism and the second drive mechanism by signal, and the control cabinet is signal-connected to the welding equipment.

[0010] In combination with the first aspect, in one embodiment, the welding pipe driving device includes at least two groups of welding pipe turntables, the at least two groups of welding pipe turntables are arranged at intervals along the extension direction of the track, and the second driving mechanism is respectively connected to the at least two groups of welding pipe turntables.

[0011] In combination with the first aspect, in one embodiment, each group of the welding pipe turntables includes: a support table; at least two groups of rotating components, at least two groups of the rotating components are symmetrically arranged on the support table along a spacing direction perpendicular to the at least two groups of the welding pipe turntables, each group of the rotating components includes a rotating shaft installed on the support table, and a pipe supporting roller sleeved on the outer periphery of the rotating shaft, the pipe supporting roller is coaxially arranged with the rotating shaft, and the rotating shaft is connected to the second driving mechanism.

[0012] In combination with the first aspect, in one embodiment, the mobile platform includes: a support panel, the welding assembly is fixed to the support panel; a support roller, the support roller is installed at the bottom of the support panel, and the support roller is slidably installed on the track; a horizontal wheel, the horizontal wheel is also installed at the bottom of the support panel, and the axis of the horizontal wheel is perpendicular to the axis of the support roller, and the outer periphery of the horizontal wheel is in contact with the outer side of the track.

[0013] In the second aspect, an embodiment of the present application provides a welding method for a welding device of a spiral submerged arc welded pipe as described above, which includes the following steps: adjusting the height of the welding cantilever so that the welding cantilever is located above the spiral submerged arc welded pipe; respectively controlling the first driving mechanism and the second driving mechanism so that the first driving mechanism drives the moving platform to move along the track, and at the same time, the second driving mechanism drives the welding pipe driving device to rotate, so that the welding pipe driving device drives the spiral submerged arc welded pipe to rotate around the axis of the spiral submerged arc welded pipe.

[0014] In combination with the second aspect, in one embodiment, the welding cantilever includes a fixed rod and an adjusting rod sleeved on the outside of the fixed rod, the fixed rod and the adjusting rod are respectively provided with a first adjusting groove and a second adjusting groove corresponding to each other, and the first adjusting groove and the second adjusting groove are provided with an adjusting fixing device, the adjusting rod is installed with a welding system, and the height of the welding cantilever is adjusted so that the welding cantilever is located above the spiral submerged arc welded pipe, including: moving the adjusting rod along the extension direction of the fixed rod so that the welding system is located above the spiral submerged arc welded pipe.

[0015] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0016] By utilizing the first driving mechanism to drive a mobile platform equipped with a welding assembly to move along a track, and synchronously utilizing the welding pipe driving device to drive the spiral submerged arc welded pipe to rotate around the axis of the spiral submerged arc welded pipe when the mobile platform moves, the spiral submerged arc welded pipe and the welding cantilever can be driven synchronously, and the butt welds on the spiral submerged arc welded pipe can be welded by the welding device, thereby solving the technical problem that the related technology uses a completely manual welding method to repair welds, which not only has high labor intensity for operators and low production efficiency, but also is difficult to ensure quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the main structure of a welding device provided in an embodiment of the present application;

[0019] Figure 2 A schematic structural diagram of a fixing rod provided in an embodiment of the present application from one perspective;

[0020] Figure 3 A schematic diagram of the structure of the adjustment rod provided in the embodiment of the present application;

[0021] Figure 4 This is a schematic structural diagram of a fixing rod from another perspective provided in an embodiment of the present application.

[0022] In the figure:

[0023] 1. Track;

[0024] 21. Support panel; 22. Support roller;

[0025] 31. welding cantilever; 311. fixing rod; 3111. first adjustment slot; 312. adjustment rod; 32. welding column; 33. welding system;

[0026] 41. support platform, 42. rotating assembly;

[0027] 5. Spiral submerged arc welded pipe;

[0028] 6. Welding equipment;

[0029] 7. Control cabinet. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The embodiment of the present application provides a welding device for a spiral submerged arc welded pipe, which can solve the technical problems in the related art of repairing a large number of welds by a completely manual welding method, which not only has high labor intensity for operators and low production efficiency, but also is difficult to ensure quality.

[0032] See also Figure 1 As shown, a spiral submerged arc welded pipe welding device provided in an embodiment of the present application may include: a track 1; a mobile platform, the mobile platform is slidably mounted on the track 1, the mobile platform is equipped with a first driving mechanism, the first driving mechanism is configured to drive the mobile platform to move along the track 1; a welding assembly, the welding assembly is fixed to the mobile platform, and the welding assembly is provided with a welding cantilever 31; a welding pipe driving device, the welding pipe driving device and the mobile platform are spaced apart along the extension direction perpendicular to the track 1, the welding cantilever 31 is suspended above the welding pipe driving device, the welding pipe driving device is connected to a second driving mechanism, the second driving mechanism is configured to drive the welding pipe driving device to rotate, so that the welding pipe driving device drives the spiral submerged arc welded pipe 5 to rotate around the axis of the spiral submerged arc welded pipe 5. In the embodiment of the present application, the size of the mobile platform can be set to 2m×2.5m×0.3m, and the welding assembly is fixed to the top surface of the mobile platform.

[0033] The embodiment of the present application utilizes a first driving mechanism to drive a mobile platform equipped with a welding assembly to move along a track 1. The mobile platform can move at a constant speed along the track 1 under the drive of the first driving mechanism, and synchronously utilizes a welding pipe driving device to drive the spiral submerged arc welded pipe 5 to rotate around the axis of the spiral submerged arc welded pipe 5 when the mobile platform moves. The welding pipe driving device is driven by a second driving mechanism, and the second driving mechanism can also drive the welding pipe driving device to rotate at a constant speed. Then, the spiral submerged arc welded pipe 5 is also in a state of constant rotation when rotating around its own axis. At this time, the spiral submerged arc welded pipe 5 and the welding cantilever 31 can be driven synchronously, and the butt weld on the spiral submerged arc welded pipe 5 can also be welded by a welding device. The embodiment of the present application can improve the welding efficiency and weld quality of the spiral submerged arc welded pipe 5 by introducing mechanization and automation means, and solves the technical problem that the method of repairing welds by completely manual welding in the related art not only has high labor intensity for operators, low production efficiency, but also is not easy to ensure quality.

[0034] In some optional embodiments, the welding assembly may include: a welding column 32, the welding column 32 is fixed to the mobile platform, a slide rail is installed on one side of the welding column 32, the slide rail extends along the spacing direction between the welding cantilever 31 and the welding pipe driving device, and the welding cantilever 31 is slidably installed on the slide rail; a third driving mechanism, the third driving mechanism is connected to the welding cantilever 31, and the third driving mechanism is configured to drive the welding cantilever 31 to move along the slide rail. It should be understood that the extension direction of the welding column 32 is perpendicular to the table direction of the mobile platform, and the slide rail installed on the welding column 32 also extends in a direction perpendicular to the table direction of the mobile platform. The welding cantilever 31 is slidably installed on the slide rail, and the welding cantilever 31 can move along the slide rail, so that the welding cantilever 31 moves toward the side close to the welding pipe driving device or moves toward the side away from the welding pipe driving device. Furthermore, since the spiral submerged arc welded pipe 5 is placed on the welding pipe driving device during welding, the welding cantilever 31 can move toward the side close to the spiral submerged arc welded pipe 5 or the side away from the spiral submerged arc welded pipe 5, so as to facilitate the adjustment of the positional relationship between the welding cantilever 31 and the spiral submerged arc welded pipe 5 in the vertical direction, so that the welding device can adapt to a variety of spiral submerged arc welded pipes 5 of different diameters. And under the driving action of the third driving mechanism, the welding cantilever 31 can maintain a uniform movement, which enhances the stability of the movement of the welding cantilever 31, thereby greatly improving the quality of the welding effect. The uniform movement not only reduces the error in the welding process, but also makes the welding more uniform, thereby ensuring better welding results.

[0035] See also Figures 2 to 4As shown, in some optional embodiments, the welding cantilever 31 may include: a fixed rod 311, the fixed rod 311 is slidably mounted on the slide rail, and the fixed rod 311 extends in a direction perpendicular to the extension direction of the welding column 32, the fixed rod 311 is provided with a first adjustment slot 3111, and the first adjustment slot 3111 extends in the extension direction of the fixed rod 311; an adjustment rod 312, the adjustment rod 312 is sleeved on the outer side of the fixed rod 311, and the adjustment rod 312 is provided with a second adjustment slot corresponding to the first adjustment slot 3111, and the second adjustment slot also extends in the extension direction of the fixed rod 311, and an adjustment fixing device is provided in the first adjustment slot 3111 and the second adjustment slot. Preferably, the fixed rod 311 is slidably mounted on the slide rail in such a manner that a sliding part is fixed on the side of the fixed rod 311 close to the welding column 32, and the sliding part cooperates with the slide rail. The adjusting rod 312 is sleeved on the outside of the fixed rod 311, and the adjusting rod 312 can have a cavity at this time. The second adjusting groove is opened on the side wall of the adjusting rod 312, and the cavity of the adjusting rod 312 is connected with the outside through the second adjusting groove. The first adjusting groove 3111 and the second adjusting groove are correspondingly arranged, so the adjusting fixing device can be simultaneously penetrated in the first adjusting groove 3111 and the second adjusting groove. In the embodiment of the present application, the adjusting fixing device can be set as a screw and a nut matching the screw, and the screw is respectively penetrated in the first adjusting groove 3111 and the second adjusting groove, and the nut is located on the outside of the adjusting rod 312. By adjusting the tightness of the nut and the screw, the adjusting rod 312 and the fixed rod 311 can be relatively fixed or relatively moved. In the embodiment of the present application, by changing the relative position between the adjusting rod 312 and the fixing rod 311, the length of the welding cantilever 31 can be changed. When welding spiral submerged arc welded pipes 5 of different diameters, it is possible to ensure that the weld is located at the top surface of the spiral submerged arc welded pipe 5 when solidifying. Therefore, the welding position needs to be offset. The spiral submerged arc welded pipe 5 is the most gentle at the highest point, and the weld is least affected by gravity when forming. Therefore, it is most ideal to be at the highest point when the weld solidifies. Preferably, the fixing rod 311 can have a cavity, and the first adjustment groove 3111 is opened on one side of the fixing rod 311. The cavity of the fixing rod 311 is connected to the outside world through the first adjustment groove 3111. This setting method can reduce the overall weight of the welding cantilever 31. Further, the second adjustment groove can be opened on both sides of the adjusting rod 312, and the first adjustment groove 3111 can be opened on both sides of the fixing rod 311.

[0036] In some optional embodiments, the welding cantilever 31 may further include an adjustment plate, the adjustment plate is equipped with a welding system 33, the welding system 33 is used to weld the spiral submerged arc welded pipe 5, the adjustment plate is installed on the side of the adjustment rod 312 away from the welding column 32; the adjustment plate is equipped with an adjustment member, and the adjustment member is configured to drive the adjustment plate to move along the axial direction of the adjustment rod 312. The adjustment plate may be installed on the outside of the adjustment rod 312. In the embodiment of the present application, the welding system 33 may include a flux hopper, a welding wire reel and a conductive nozzle, and the flux hopper, the welding wire reel and the conductive nozzle are all fixed to the adjustment plate. By adjusting the position of the adjustment plate on the welding cantilever 31 by using the adjustment member, the position of the flux hopper, the welding wire reel and the conductive nozzle can be changed, that is, the position of the welding system 33 on the spiral submerged arc welded pipe 5 can be more accurately controlled to achieve a better welding effect. The adjusting member can be set as an adjusting screw, and the relative position of the adjusting screw and the welding cantilever 31 is determined. At this time, the adjusting plate can be fixed with a connecting bolt, and the connecting bolt is penetrated through the outer periphery of the adjusting screw. By screwing the adjusting screw, the position of the connecting bolt on the adjusting screw can be changed, thereby changing the position of the adjusting plate relative to the welding cantilever 31. In some other embodiments, when downhill welding is adopted, the position of the welding system 33 needs to deviate from the central vertex position of the spiral submerged arc welded pipe 5. When the spiral submerged arc welded pipe 5 rotates clockwise, the welding system 33 needs to be offset to the left. When the spiral submerged arc welded pipe 5 rotates counterclockwise, the welding system 33 is offset to the right. The offset distance is determined by the diameter of the spiral submerged arc welded pipe 5, and is finally adjusted according to the weld morphology.

[0037] In some optional embodiments, the welding device may further include: a welding device 6, the welding device 6 is installed on the mobile platform, and the welding device 6 is electrically connected to the welding system 33; a control cabinet 7, the control cabinet 7 is respectively connected to the first drive mechanism and the second drive mechanism by signal, and the control cabinet 7 is signal-connected to the welding device 6. In the embodiment of the present application, the welding device 6 can be set as a Lincoln welder, which is used to provide welding specifications for welding so that the welding parameters meet the process requirements, and its model can be selected as DC-1500. The control cabinet 7 can be connected to the Lincoln welder through electrical signals, and is also connected to the first drive mechanism and the second drive mechanism through electrical signals, so that the control cabinet 7 can synchronously control the first drive mechanism to drive the mobile platform to move along the track 1; control the second drive mechanism to drive the welding pipe drive device to rotate, thereby driving the spiral submerged arc welding pipe 5 to rotate around the axis of the spiral submerged arc welding pipe 5; and control the welding system 33 to start welding. In this process, the moving speed and direction of the mobile platform and the rotation speed of the welding pipe drive device can be more accurately controlled. The control cabinet 7 can make the welding process as much as possible under the best conditions, thereby improving the welding efficiency and welding quality.

[0038] Specifically, the control cabinet 7 can be installed on the mobile platform and can be used to control the power supply. The control cabinet 7 can include a G120 inverter, a NA5 control box, a contactor, an intermediate relay, etc. The welding system 33 can include 9 contactors, and the contactors are used to control related actions. Specifically, the contactors can include control of the rough lifting of the welding cantilever 31, control of the rough lowering of the welding cantilever 31, control of the rough left of the welding cantilever 31, control of the rough right of the welding cantilever 31, control of the fine lifting of the welding cantilever 31, control of the fine lowering of the welding cantilever 31, control of the fine left of the welding cantilever 31, control of the fine right of the welding cantilever 31 and the control circuit. The intermediate relay control may include controlling the precise lifting of the welding cantilever 31, controlling the precise lowering of the welding cantilever 31, controlling the precise left side of the welding cantilever 31, controlling the precise right side of the welding cantilever 31, controlling the lifting of the welding wire, controlling the lowering of the welding wire, controlling the southward rotation of the welding pipe turntable, controlling the northward rotation of the welding pipe turntable, controlling the eastward movement of the mobile platform, and controlling the westward movement of the mobile platform. The intermediate relays for controlling the southward rotation of the welding pipe turntable and controlling the northward rotation of the welding pipe turntable can control the turntable motor frequency converter by electric shock, and controlling the eastward movement of the mobile platform and controlling the westward movement of the mobile platform can control the walking motor frequency converter by electric shock.

[0039] Preferably, a display screen can be installed on the control cabinet 7. During the actual operation, after the welding point is aligned with the butt seam, the weld tracking laser point position is aligned with the outer weld, and the tracking laser camera is adjusted to align the laser point, so that the deviation during welding can be observed on the display screen of the control cabinet 7, and timely adjustments can be made to reduce the welding deviation. Before welding, the knob on the control cabinet 7 is operated to raise the conductive brush in the welding system 33 to contact the spiral submerged arc welding pipe 5, and the flux hopper valve of the welding system 33 is opened to allow the flux to fall into the welding position; during welding, the knob is turned on the control cabinet 7 to start the mobile platform and the welding pipe turntable, and welding is started. The deviation of the laser point can be observed through the display screen, and when it deviates, it can be adjusted by controlling the speed of the mobile platform.

[0040] In some optional embodiments, the welding pipe driving device includes at least two groups of welding pipe turntables, at least two groups of welding pipe turntables are arranged at intervals along the extension direction of the track 1, and the second driving mechanism is respectively connected to the at least two groups of welding pipe turntables. In the embodiment of the present application, two groups of welding pipe turntables are provided, and the two groups of welding pipe turntables jointly support the spiral submerged arc welding pipe 5, and the two groups of welding pipe turntables are respectively supported at both ends of the spiral submerged arc welding pipe 5, so as to achieve the support of the spiral submerged arc welding pipe 5 while reducing the manufacturing cost of the welding device. It should be understood that the two groups of welding pipe turntables are synchronously driven by the second driving mechanism, and when the spiral submerged arc welding pipe 5 is placed thereon, the two ends can maintain a synchronous rotation state. In some other embodiments, the welding pipe driving device can also be set to three or more groups of welding pipe turntables, or set to a group of rotating mechanisms with a longer length, and its length needs to ensure that it can support the spiral submerged arc welding pipe 5.

[0041] In some optional embodiments, each group of the welded pipe turntable may include: a support table 41; at least two groups of rotating components 42, at least two groups of rotating components 42 are symmetrically arranged on the support table 41 along a direction perpendicular to the spacing direction of at least two groups of the welded pipe turntables, each group of rotating components 42 includes a rotating shaft mounted on the support table 41, and a pipe support roller sleeved on the outer periphery of the rotating shaft, the pipe support roller is coaxially arranged with the rotating shaft, and the rotating shaft is connected to the second driving mechanism. In the embodiment of the present application, the rotating shaft can be rotatably mounted on the support table 41, and the pipe support roller is fixedly sleeved on the outer periphery of the rotating shaft, and the spiral submerged arc welded pipe 5 can be placed on the pipe support roller and directly contact the pipe support roller. It should be understood that the axes of the at least two groups of rotating components 42 installed on each support table 41 are parallel to each other. When the spiral submerged arc welded pipe 5 is placed on the at least two groups of rotating components 42, the at least two groups of rotating components 42 are symmetrically arranged along the axis of the spiral submerged arc welded pipe 5 to enhance the balance of the overall placement of the spiral submerged arc welded pipe 5. Furthermore, the corresponding rotating shafts in each group of welding pipe turntables are coaxially arranged, and the corresponding pipe support rollers are also coaxially arranged, so as to ensure as much as possible that when the pipe support rollers and rotating shafts in each group of welding pipe turntables rotate synchronously, the spiral submerged arc welded pipe 5 can rotate along the axis of the spiral submerged arc welded pipe 5, thereby reducing the occurrence of offset and improving the welding quality of the weld.

[0042] In some optional embodiments, the mobile platform may include: a support panel 21, the welding assembly is fixed to the support panel 21; a support roller 22, the support roller 22 is installed at the bottom of the support panel 21, and the support roller 22 is slidably installed on the track 1; a horizontal wheel, the horizontal wheel is also installed at the bottom of the support panel 21, and the axis of the horizontal wheel is perpendicular to the axis of the support roller 22, and the outer periphery of the horizontal wheel is in contact with the outer side of the track 1. In the embodiment of the present application, the support panel 21 is set to a horizontal surface with a size of 2m×2.5m×0.3m, and the support roller 22 is slidably installed on the track 1 and supports the support panel 21. Specifically, the support roller 22 is set to four, and the four support rollers 22 support the support panel 21 in a balanced manner, and are arranged opposite to each other in pairs. The two oppositely arranged support rollers 22 can be respectively connected to the two ends of a rotating shaft and symmetrically arranged along the extension direction perpendicular to the track 1. Preferably, the horizontal wheels are also set to four, and the four horizontal wheels protect the support rollers 22 from sliding out of the track 1 as much as possible. In the embodiment of the present application, by setting a horizontal wheel, the moving track of the support roller 22 can be effectively protected from deviation, thereby enhancing the moving stability. In the embodiment of the present application, semi-automatic submerged arc welding is adopted, and the wire feeding and arc movement of the semi-automatic submerged arc welding can be automatically completed by a special machine head, and the welding speed is jointly controlled by the speed of the mobile platform and the welding pipe driving device. The speed directions between them are perpendicular to each other, and the speed size controls the direction and size of the combined speed, that is, the size and direction of the welding speed. The wire feeding is completed by a machine. During welding, the flux is spread in front of the arc by the flux bucket. After welding, the unmelted flux can be automatically recovered by a flux recovery device, or manually cleaned and recovered.

[0043] In the embodiment of the present application, submerged arc welding is adopted, the welding current used is large, the corresponding input power is large, and the heat insulation effect of the flux and slag is combined, the thermal efficiency is high, and the penetration depth is large. The groove of the spiral submerged arc welded pipe 5 can be small, which reduces the amount of filler metal. Single-wire submerged arc welding can penetrate 20mm at a time without opening the groove of the workpiece; the welding speed is high. Taking the butt welding of steel plates with a thickness of 8 to 10mm as an example, the speed of single-wire submerged arc welding can reach 50 to 80cm / min, while manual arc welding does not exceed 10 to 13cm / min; the presence of flux can not only separate the contact between the molten metal and the air, but also make the molten pool metal solidify more slowly. There is more time for metallurgical reaction between the liquid metal and the molten flux, which reduces the possibility of defects such as pores and cracks in the weld. The flux can also add some alloy elements to the weld metal to improve the mechanical properties of the weld metal; when welding in a windy environment, the protection effect of submerged arc welding is better than other arc welding methods. During automatic welding, the welding parameters can be kept stable through automatic adjustment. Compared with manual arc welding, the degree of dependence of welding quality on the skill level of the welder can be greatly reduced; in addition, there is no arc light radiation, and the working conditions are better. In addition, submerged arc welding also provides process guidance for the welding of the outer weld of the butt seam of the spiral submerged arc welded pipe 5, ensuring that the welding process is stable and reliable, ensuring that the welding quality meets the requirements, and minimizing production costs. It can also improve welding work efficiency. Compared with other butt welding processes, this method can directly carry out welding work without air gouging and root cleaning of the butt seam.

[0044] Furthermore, in the embodiment of the present application, semi-automatic welding is adopted, and the relevant parameters of welding current, welding voltage and welding speed can be input into the control cabinet, so that the welding equipment 6 can provide a relatively stable current and voltage, and ensure the stability of current and voltage during welding; in addition, the welding current can be controlled so that the current size can be adjusted according to factors such as welding materials and welding thickness during welding to ensure the quality and efficiency of welding. It should be understood that the rotation speed of the spiral submerged arc welding pipe 5 and the movement speed of the mobile platform jointly determine the welding speed. After the welding speed is determined, the movement speed of the mobile platform and the rotation speed of the welding pipe turntable are input into the control cabinet to meet the welding trajectory and the outer weld of the butt joint to avoid welding deviation.

[0045] The embodiment of the present application also provides a welding method of the above-mentioned spiral submerged arc welded pipe welding device, which comprises the following steps:

[0046] S1: Adjust the height of the welding cantilever 31 so that the welding cantilever 31 is located above the spiral submerged arc welded pipe 5. That is, after the spiral submerged arc welded pipe 5 is placed on the welded pipe turntable, the height of the welding cantilever 31 is adjusted so that the welding cantilever 31 is located on the top surface of the spiral submerged arc welded pipe 5.

[0047] S2: Control the first driving mechanism and the second driving mechanism respectively, so that the first driving mechanism drives the mobile platform to move along the track 1, and at the same time, the second driving mechanism drives the welding pipe driving device to rotate, so that the welding pipe driving device drives the spiral submerged arc welding pipe 5 to rotate around the axis of the spiral submerged arc welding pipe 5. In the process of welding the spiral submerged arc welding pipe 5, the mobile platform is synchronously driven to move along the track 1 and the welding pipe driving device is driven to rotate. At this time, while the spiral submerged arc welding pipe 5 rotates around its own axis, the mobile platform also drives the welding cantilever 31 to move, so that the welding device can complete the welding process of the spiral weld of the spiral submerged arc welding pipe 5.

[0048] In some optional embodiments, the welding cantilever 31 includes a fixed rod 311 and an adjusting rod 312 sleeved on the outside of the fixed rod 311, the fixed rod 311 and the adjusting rod 312 are respectively provided with a first adjusting slot 3111 and a second adjusting slot corresponding to each other, and the first adjusting slot 3111 and the second adjusting slot are provided with an adjusting fixing device, the adjusting rod 312 is installed with a welding system 33, and the height of the welding cantilever 31 is adjusted so that the welding cantilever 31 is located above the spiral submerged arc welded pipe 5, including: moving the adjusting rod 312 along the extension direction of the fixed rod 311 so that the welding system 33 is located above the spiral submerged arc welded pipe 5. In the embodiment of the present application, the welding system 33 installed on the welding cantilever 31 can be located above the spiral submerged arc welded pipe 5, and after the adjusting rod 312 is adjusted a certain distance along the extension direction of the fixed rod 311, the position of the adjusting plate can also be adjusted to make the adjustment result more accurate. Since the spiral submerged arc welded pipe 5 is most gentle at the highest point and the weld is least affected by gravity, the welding position can be determined according to the welding speed and welding current, and the welding system 33 is moved to the welding position at the highest point to form a molten weld during welding. At the same time, the spiral submerged arc welded pipe 5 rotates counterclockwise. After a certain period of time, the welding position rotates to the highest point, and the molten weld solidifies at the highest point after a certain period of time. The weld formed at this time has a good appearance and no obvious defects.

[0049] In the embodiment of the present application, the welding device of the spiral submerged arc welded pipe can improve the production efficiency, so that the outer weld welding device 6 of the butt seam can be welded continuously and stably without manual operation and rest, thereby greatly improving the production efficiency. And the average welding speed of the welding device is 40 to 120 cm / minute, which is much higher than the 40 to 60 cm / minute of manual welding. In addition, the butt seam outer weld welding device 6 can complete a large number of welding tasks in a short time, which is faster than manual welding; reduce labor costs, and the butt seam outer weld welding device 6 can reduce the demand for manual labor, thereby reducing labor costs. One welding device can replace 2 to 4 workers and can produce continuously for 24 hours, greatly reducing labor costs. In large-scale and continuous welding tasks, the use of welding devices can save a lot of labor costs; reduce the intensity of manual labor, and the welding device can replace manual labor to complete welding tasks, reducing the physical labor intensity of welders. Welders only need to operate and monitor the equipment, and do not need to maintain the welding posture for a long time, which reduces the body load and improves the comfort of work; improve safety, the welding device has a safety protection device and an automatic control system, which can reduce the occurrence of accidents. In contrast, manual welding has dangerous factors such as careless operation, smoke and high temperature, which can easily cause injuries or occupational diseases to workers; to stabilize welding quality, the welding device adopts advanced welding technology and precise welding parameter control, which can ensure the stability and consistency of welding quality. In contrast, manual welding is easily affected by factors such as operating skills, fatigue and environment, and welding quality is difficult to guarantee; to reduce management difficulty and product costs, the welding device can reduce the number of operators and inspectors, reduce management difficulty and product costs. The welding device can greatly reduce the number of employees and improve product competitiveness; through intelligence and process quality control, the welding device can be equipped with an intelligent control system to automatically adjust the welding current and welding system 33 posture in real time according to the molten pool state, groove shape, gas flow, etc. during welding, and has multiple sets of welding expert databases built in to ensure the controllability and high quality of the welding process.

[0050] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0051] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0052] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A welding device for spiral submerged arc welded pipe, characterized in that: It includes: Track (1); A mobile platform, the mobile platform being slidably mounted on the track (1), the mobile platform being equipped with a first driving mechanism, the first driving mechanism being configured to drive the mobile platform to move along the track (1); A welding assembly, the welding assembly is fixed to the mobile platform and is provided with a welding cantilever (31); A welding pipe driving device, wherein the welding pipe driving device and the mobile platform are spaced apart along an extension direction perpendicular to the track (1), the welding cantilever (31) is suspended above the welding pipe driving device, and the welding pipe driving device is connected to a second driving mechanism, the second driving mechanism is configured to drive the welding pipe driving device to rotate, so that the welding pipe driving device drives the spiral submerged arc welded pipe (5) to rotate around the axis of the spiral submerged arc welded pipe (5).

2. The spiral submerged arc welded pipe welding device according to claim 1, characterized in that: The welding assembly comprises: A welding column (32), the welding column (32) being fixed to the mobile platform, a slide rail being installed on one side of the welding column (32), the slide rail extending along the spacing direction between the welding cantilever (31) and the welding pipe driving device, and the welding cantilever (31) being slidably installed on the slide rail; A third driving mechanism, the third driving mechanism is connected to the welding cantilever (31), and the third driving mechanism is configured to drive the welding cantilever (31) to move along the slide rail.

3. The spiral submerged arc welded pipe welding device according to claim 2, characterized in that: The welding cantilever (31) comprises: A fixing rod (311), the fixing rod (311) is slidably mounted on the slide rail, and the fixing rod (311) extends in a direction perpendicular to the extension direction of the welding column (32), and the fixing rod (311) is provided with a first adjustment slot (3111), and the first adjustment slot (3111) extends in the extension direction of the fixing rod (311); An adjusting rod (312), wherein the adjusting rod (312) is sleeved on the outer side of the fixing rod (311), and the adjusting rod (312) is provided with a second adjusting slot corresponding to the first adjusting slot (3111), and the second adjusting slot also extends along the extension direction of the fixing rod (311), and an adjusting fixing device is provided in the first adjusting slot (3111) and the second adjusting slot.

4. The welding device for spiral submerged arc welded pipe according to claim 3, characterized in that: The welding cantilever (31) further comprises an adjustment plate, the adjustment plate being equipped with a welding system (33), the welding system (33) being used for welding a spiral submerged arc welded pipe (5), the adjustment plate being installed on a side of the adjustment rod (312) away from the welding column (32); The adjustment plate is installed with an adjustment member, and the adjustment member is configured to drive the adjustment plate to move along the axial direction of the adjustment rod (312).

5. The spiral submerged arc welded pipe welding device according to claim 4, characterized in that: The welding device also includes: A welding device (6), wherein the welding device (6) is mounted on a mobile platform and the welding device (6) is electrically connected to the welding system (33); A control cabinet (7), the control cabinet (7) is respectively connected to the first drive mechanism and the second drive mechanism by signal, and the control cabinet (7) is connected to the welding equipment (6) by signal.

6. The spiral submerged arc welded pipe welding device according to claim 1, characterized in that: The welding pipe driving device comprises at least two groups of welding pipe turntables, the at least two groups of welding pipe turntables are arranged at intervals along the extension direction of the track (1), and the second driving mechanism is respectively connected to the at least two groups of welding pipe turntables.

7. The welding device for spiral submerged arc welded pipe according to claim 6, characterized in that: Each set of the welded pipe turntable comprises: Support platform (41); At least two groups of rotating components (42), at least two groups of rotating components (42) are symmetrically arranged on the support platform (41) along a spacing direction perpendicular to the at least two groups of welding pipe turntables, each group of rotating components (42) includes a rotating shaft installed on the support platform (41), and a pipe supporting roller sleeved on the outer periphery of the rotating shaft, the pipe supporting roller is coaxially arranged with the rotating shaft, and the rotating shaft is connected to the second driving mechanism.

8. The spiral submerged arc welded pipe welding device according to claim 1, characterized in that: The mobile platform comprises: A supporting panel (21), the welding assembly being fixed to the supporting panel (21); A supporting roller (22), the supporting roller (22) being mounted on the bottom of the supporting panel (21), and the supporting roller (22) being slidably mounted on the track (1); A horizontal wheel is also installed at the bottom of the support panel (21), and the axis of the horizontal wheel is perpendicular to the axis of the support roller (22), and the outer periphery of the horizontal wheel is in contact with the outer side of the track (1).

9. A welding method for a spiral submerged arc welded pipe welding device according to any one of claims 1 to 8, characterized in that: It includes the following steps: Adjusting the height of the welding cantilever (31) so that the welding cantilever (31) is located above the spiral submerged arc welded pipe (5); The first drive mechanism and the second drive mechanism are controlled respectively, so that the first drive mechanism drives the mobile platform to move along the track (1), and at the same time, the second drive mechanism drives the welding pipe drive device to rotate, so that the welding pipe drive device drives the spiral submerged arc welding pipe (5) to rotate around the axis of the spiral submerged arc welding pipe (5).

10. The welding method according to claim 9, characterized in that: The welding cantilever (31) comprises a fixing rod (311) and an adjusting rod (312) sleeved on the outside of the fixing rod (311), the fixing rod (311) and the adjusting rod (312) are respectively provided with a first adjusting slot (3111) and a second adjusting slot corresponding to each other, and an adjusting fixing device is provided in the first adjusting slot (3111) and the second adjusting slot, the adjusting rod (312) is installed with a welding system (33), and the height of the welding cantilever (31) is adjusted so that the welding cantilever (31) is located above the spiral submerged arc welded pipe (5), comprising: The adjusting rod (312) is moved along the extending direction of the fixing rod (311) so that the welding system (33) is located above the spiral submerged arc welded pipe (5).

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