Circular seam welding and straight seam welding integrated pipe fitting submerged arc welding device and method

Abstract

The invention relates to the field of submerged arc automatic welding, in particular to a pipe fitting submerged arc welding device and method integrating circular seam welding and straight seam welding. The device comprises an overturning and clamping assembly, two roller mechanisms and a welding mechanism, the overturning and clamping assembly comprises a clamping base, a clamping mechanism and an overturning power mechanism, the clamping mechanism is used for clamping and rotating a to-be-welded pipe fitting and rotationally installed on the clamping base, and the overturning power mechanism is used for driving the clamping mechanism to overturn; the two roller mechanisms respectively comprise a lifting driving piece, a roller frame and a roller, the lifting driving piece is connected with the corresponding roller frame, and the roller is rotatably supported on the corresponding roller frame; the rollers of the two roller mechanisms are respectively a cylindrical roller and a conical roller; the welding mechanism is used for conducting circular seam welding on the pipe fitting in the rotating process of the pipe fitting. And straight seam welding is conducted on the pipe fitting in a sliding mode when the pipe fitting is kept static. The circular seam welding and straight seam welding device can realize circular seam welding and straight seam welding of large-diameter and heavy-weight pipe fittings at the same time, is high in efficiency and low in difficulty, and meets various welding postures.

Description

Technical Field

[0001] The invention relates to the field of submerged arc automatic welding, and in particular to a pipe submerged arc welding device and method integrating girth welding and straight seam welding. Background Art

[0002] Pipe fittings, such as steel pipes, are used in various manufacturing industries. They are commonly seen in the production and manufacturing of pressure vessels. Most types of compensators must use steel pipes, such as steel pipes, bellows, end pipes, guide tubes, brackets, flanges and other accessories that are combined into bellows compensators. The core function of the compensator is to deal with thermal expansion or contraction caused by temperature changes, to avoid damage to the pipeline or leakage at the connection. At the same time, the compensator can absorb vibrations during the operation of the equipment, reduce the impact on the pipeline and bracket, and adapt to the displacement changes of the pipeline to ensure the stability of the system.

[0003] At present, small-diameter steel pipes can be formed directly, while large-diameter steel pipes can be formed directly. The transportation cost and efficiency of steel pipe buyers will increase a lot, so buyers choose to purchase steel plates and then weld them into steel coils. After the steel plates are rolled into the shape of steel pipes, straight seam welding is required for the butt gap between the steel plates; and circumferential seam welding is required to weld one end of a pipe to another pipe. For steel plates with a thickness of more than 10mm, submerged arc automatic welding is generally used.

[0004] However, there are the following disadvantages in the welding of steel pipes in most factories:

[0005] 1) During the welding process, the steel pipe billet needs to be fixed by a crane and placed on a flat surface. However, the movement trajectory of the welding machine is fixed, so workers need to use iron rods to fine-tune the position of the steel pipe during welding. Ordinary steel pipes weigh several hundred kilograms, which is very inconvenient for workers to operate and greatly increases the probability of safety accidents for workers.

[0006] 2) Since some straight seam welding is done on both sides of the steel pipe, after the internal welding of the steel pipe is completed, the workpiece needs to be transferred to another worker who is responsible for welding the outside of the steel pipe. The welder welding the outside of the steel pipe needs to re-align the welding gun track, which greatly increases the workload. In addition, the two welders take up more space, and the transfer of the workpiece reduces production efficiency and increases labor costs. Safety accidents may also occur during the transfer process using a crane. In addition, the temperature of the workpiece that has just been welded is very high, and workers are prone to burns during the transfer process.

[0007] 3) Moreover, many machines can only weld straight seams of steel pipes and cannot complete the welding of circumferential seams.

[0008] Therefore, there is an urgent need to design a welding device that integrates girth welding and straight seam welding and can achieve welding of large-diameter and heavy-weight pipe fittings. Summary of the invention

[0009] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a pipe submerged arc welding device integrating girth welding and straight seam welding, which can simultaneously realize girth welding and straight seam welding of large-diameter and heavy-weight pipes, improve efficiency, reduce difficulty, and meet a variety of welding postures.

[0010] In order to solve the above technical problems, the technical solution of the present invention is: a pipe submerged arc welding device integrating girth welding and straight seam welding, comprising:

[0011] The flip clamping assembly comprises a clamping base, a clamping mechanism and a flipping power mechanism, wherein the clamping mechanism is used to clamp and rotate the pipe to be welded and is rotatably mounted on the clamping base, and the flipping power mechanism is used to drive the clamping mechanism to flip so as to adjust the pitch angle of the pipe to be welded;

[0012] Two roller mechanisms, respectively comprising a lifting drive member, a roller frame and a roller, wherein the lifting drive member is connected to the corresponding roller frame and used to drive the corresponding roller frame to lift and lower, and the roller is rotatably supported on the corresponding roller frame; the roller of one roller mechanism is a cylindrical roller, which has a plurality of rollers arranged along an arc track, and is used to support the pipe through its roller surface, and can be driven to rotate by the rotating pipe; the roller of the other roller mechanism is a conical roller, which has two opposite rollers, and is used to support the pipe through its roller surface, and the axial direction is perpendicular to the axial direction of the cylindrical roller;

[0013] The welding mechanism is configured to be able to slide along the projection direction of the axial direction of the pipe on the horizontal plane, and is used to keep the pipe in place during the rotation of the pipe to perform girth welding on the pipe; and to slide to perform straight seam welding on the pipe when the pipe remains stationary.

[0014] In order to further make the roller mechanism suitable for pipes of various lengths, the pipe submerged arc welding device integrating girth welding and straight seam welding also includes a roller base, and the lifting and lowering driving parts of the two roller mechanisms are respectively installed on the roller base, and the roller base is configured to be able to slide along the projection direction of the axial direction of the pipe on the horizontal plane.

[0015] To further facilitate alignment, the pipe submerged arc welding device that integrates circumferential seam welding and straight seam welding also includes a bed frame, on which two inner rails and two outer rails are provided, the clamping base is fixedly mounted on the bed frame, the roller base is slidably mounted on the two inner rails, and the welding mechanism is slidably mounted on the two outer rails.

[0016] A specific structure of a flipping power mechanism is further provided, the flipping power mechanism comprising:

[0017] A flip hydraulic rod, one end of which is hinged to the clamping base, and the other end of which is hinged to the clamping mechanism;

[0018] And / or a flip motor assembly, including a flip motor, a half gear and a transmission gear, the half gear is fixedly connected to the clamping mechanism, the output shaft of the flip motor is connected to the transmission gear through a reducer to drive the rotation, and the transmission gear is meshed with the half gear.

[0019] A specific structure of a clamping mechanism is further provided, the clamping mechanism comprising:

[0020] Chuck bracket;

[0021] A chuck, rotatably mounted on the chuck bracket;

[0022] A chuck rotation driving mechanism, connected between the chuck bracket and the chuck, and used for driving the chuck to rotate;

[0023] An inner jaw assembly, disposed on the chuck, for clamping the inner wall of the pipe;

[0024] The outer clamping jaw group is arranged on the chuck and is used for clamping the outer wall of the pipe.

[0025] A specific structure of a welding mechanism is further provided, the welding mechanism comprising:

[0026] The movable base can slide along the projection direction of the axial direction of the pipe on the horizontal plane under the drive of its power structure;

[0027] A mounting frame is mounted on the mobile base, and a power member for driving the mounting frame to rise and fall is arranged between the mounting frame and the mobile base;

[0028] The welding wire supply mechanism comprises a welding wire reel and a plurality of welding wire guide wheels, at least one welding wire guide wheel is a powered guide wheel, the mounting frame is provided with a welding wire channel, and the welding wire unwound from the welding wire reel passes through the welding wire channel and is guided by the welding wire guide wheel to a free end facing downward;

[0029] A welding gun is mounted on the mounting frame.

[0030] A specific structure of a welding mechanism is further provided, wherein the welding mechanism further comprises:

[0031] Two flux barrels are respectively installed on the mobile base, and the flux outlet of one of the flux barrels is connected to the welding gun through a pipeline;

[0032] The flux recovery adsorbent is installed on the mobile base and is connected to another flux barrel through a pipeline.

[0033] Furthermore, the movable base is configured with two, the mounting frame includes a cross beam and a longitudinal beam connected to each other, the cross beam is respectively connected to the two movable bases, the welding gun is installed at the head of the longitudinal beam, and the welding wire channel is arranged on the longitudinal beam.

[0034] The present invention also provides a welding method based on a pipe submerged arc welding device integrating girth welding and straight seam welding. When performing girth welding, the welding method comprises:

[0035] Step S1, the clamping mechanism clamps the pipe to be welded;

[0036] Step S2, flipping the clamping assembly to keep the axial direction of the pipe extending in the vertical direction; or flipping the pipe to a corresponding pitch angle with the cooperation of a roller mechanism with conical rollers, and then supporting the pipe by the roller mechanism with cylindrical rollers;

[0037] Step S3, the welding mechanism moves to the welding position, the clamping mechanism drives the pipe to be welded to rotate, and the welding mechanism performs girth welding on the pipe;

[0038] When performing straight seam welding, the welding methods include:

[0039] Step S1, the clamping mechanism clamps the pipe to be welded;

[0040] Step S2, the turning and clamping assembly is turned over with the cooperation of a roller mechanism having a conical roller until the axial direction of the pipe is horizontal;

[0041] Step S3, the welding mechanism performs straight seam welding on the pipe fitting during the movement.

[0042] After adopting the above technical scheme, the present invention can realize seam welding and straight seam welding at the same time through the cooperation of the flip clamping assembly, two roller assemblies and the welding mechanism, which can greatly improve work efficiency, reduce labor costs, and reduce the probability of worker safety accidents; the flip clamping assembly is arranged to be able to adjust the pitch angle of the pipe fitting, so that the pipe fitting has more welding postures, thereby solving more welding angle problems; the present invention adjusts the pitch angle of the pipe fitting through the cooperation of the flip clamping assembly and the two roller assemblies, and jointly realizes the fixation of the pipe fitting, so that the entire device is suitable for large-diameter and heavy-weight pipe fittings, and can also extend the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a structural schematic diagram of a pipe submerged arc welding device integrating girth welding and straight seam welding according to the present invention;

[0044] Figure 2 It is a structural schematic diagram of the flip clamping assembly of the present invention;

[0045] Figure 3 for Figure 2 A structural diagram from another perspective;

[0046] Figure 4 It is a schematic structural diagram of two roller mechanisms of the present invention;

[0047] Figure 5 It is a structural schematic diagram of the welding mechanism of the present invention;

[0048] Figure 6 for Figure 5 A magnified view of part A;

[0049] Figure 7 A flow chart of performing girth welding on a pipe submerged arc welding device that integrates girth welding and straight seam welding according to the present invention;

[0050] Figure 8 A flow chart of performing straight seam welding on a pipe fitting submerged arc welding device integrating girth welding and straight seam welding according to the present invention;

[0051] In the figure:

[0052] 1. Flip clamping assembly; 11. Clamping base; 12. Clamping mechanism; 121. Chuck bracket; 122. Chuck; 123. Chuck rotation drive mechanism; 1231. Rotating motor; 1232. Driving gear; 1233. Driven gear; 124. Inner clamping claw group; 125. Outer clamping claw group; 13. Flipping power mechanism; 13a. Flipping hydraulic rod; 13b. Flipping motor assembly; 131b. Flipping motor; 132b. Half gear; 133b. Transmission gear;

[0053] 2. roller mechanism; 21. lifting drive member; 22. roller frame; 23. roller; 23a. cylindrical roller; 23b. conical roller;

[0054] 3. Welding mechanism; 31. Mobile base; 32. Mounting frame; 321. Crossbeam; 322. Longitudinal beam; 33. Welding wire supply mechanism; 331. Welding wire reel; 332. Welding wire guide wheel; 333. Welding wire channel; 34. Welding gun; 35. Flux barrel; 36. Flux recovery adsorbent;

[0055] 4. Roller base;

[0056] 5. Bed frame; 51. Inner track; 52. Outer track;

[0057] 6. Welding wire. DETAILED DESCRIPTION

[0058] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0059] like Figures 1 to 6As shown, a pipe submerged arc welding device integrating girth welding and straight seam welding comprises:

[0060] The flip clamping assembly 1 comprises a clamping base 11, a clamping mechanism 12 and a flipping power mechanism 13. The clamping mechanism 12 is used to clamp and rotate the pipe to be welded and is rotatably mounted on the clamping base 11. The flipping power mechanism 13 is used to drive the clamping mechanism 12 to flip so as to adjust the pitch angle of the pipe to be welded.

[0061] The two roller mechanisms 2 respectively include a lifting drive member 21, a roller frame 22 and a roller 23. The lifting drive member 21 is connected to the corresponding roller frame 22 and is used to drive the corresponding roller frame 22 to lift and lower. The roller 23 is rotatably supported on the corresponding roller frame 22. The roller 23 of one roller mechanism 2 is a cylindrical roller 23a, which has a plurality of rollers arranged along an arc track, and is used to support the pipe through its roller surface, and can be driven to rotate by the rotating pipe. The roller 23 of the other roller mechanism 2 is a conical roller 23b, which has two opposite rollers, and is used to support the pipe through its roller surface, and the axial direction is perpendicular to the axial direction of the cylindrical roller 23a.

[0062] The welding mechanism 3 is configured to be able to slide along the axial projection direction of the pipe on the horizontal plane, and is used to keep the pipe in place during rotation to perform girth welding on the pipe; and to slide to perform straight seam welding on the pipe when the pipe remains stationary.

[0063] Among them, Figure 7 As shown, when performing girth welding, the welding method includes:

[0064] Step S1, the clamping mechanism 12 clamps the pipe to be welded;

[0065] Step S2, flip the clamping assembly 1 to keep the axial direction of the pipe extending in the vertical direction; or flip it with the cooperation of the roller mechanism 2 with the conical roller 23b until the pipe reaches a corresponding pitch angle, the pitch angle can be 0, and then the roller mechanism 2 with the cylindrical roller 23a is used to support the auxiliary support pipe;

[0066] Step S3, the welding mechanism 3 moves to the welding position, the clamping mechanism 12 drives the pipe to be welded to rotate, and the welding mechanism 3 performs girth welding on the pipe.

[0067] The welding object of the girth weld can be two butted pipes. In this case, the axial direction of the pipe is preferably horizontal. The welding object of the girth weld can also be the welding of the pipe and the flange. When the lower end of the pipe is welded to the upper end of the flange, in this case, the clamping mechanism 12 directly clamps the flange. In order to facilitate welding, the axial direction of the pipe can have a certain pitch angle, which is convenient for welding the inner wall of the connection and the outer wall of the connection. When the flange is sleeved on the pipe, the clamping mechanism 12 directly clamps the pipe, and the axial direction of the pipe is preferably in the vertical direction.

[0068] In this embodiment, the clamping mechanism 12 is configured to be flippable, which can solve more welding angle problems and find a suitable welding angle. In addition, it can clamp some special-shaped and strange workpieces, and can also help workers with manual welding and adjust the position of workpieces. Therefore, the flip clamping assembly 1 in this embodiment is used to clamp pipe fittings to meet various working conditions.

[0069] It should be noted that when performing the girth weld, the two parts to be welded together have been primed or pre-welded and pre-fixed together before the upper clamping mechanism 12. In addition, when the flange and the pipe fitting are pre-fixed together, the clamping mechanism 12 directly clamps the flange, and actually also indirectly clamps the pipe fitting, which is equivalent to clamping the pipe fitting.

[0070] Among them, Figure 8 As shown, when straight seam welding is performed, the welding method includes:

[0071] Step S1, the clamping mechanism 12 clamps the pipe to be welded;

[0072] Step S2, the turning and clamping assembly 1 is turned over with the cooperation of the roller mechanism 2 having the conical roller 23b until the axial direction of the pipe is horizontal;

[0073] Step S3, the welding mechanism 3 performs straight seam welding on the pipe during the movement.

[0074] When performing straight seam welding, after the pipe to be welded is turned over to be axially horizontal, a roller mechanism 2 with a large contact area with the pipe can be selected to support the pipe according to the outer diameter of the pipe.

[0075] In this embodiment, two types of roller mechanisms 2 are provided, and the two types of roller mechanisms 2 are raised and lowered independently without affecting each other. When a roller mechanism 2 is needed, whichever roller mechanism 2 is raised can be used. The raised roller mechanism 2 is always in contact with the pipe fitting, so there will be an upward lifting force to help the clamping mechanism 21 share part of the force, which is beneficial to increase the service life of the device and is suitable for large-diameter and heavy-weight pipe fittings. In the process of girth welding of the pipe fitting, the roller mechanism 2 with the cylindrical roller 23a assists the clamping mechanism 12 to support the pipe fitting, and the cylindrical roller 23a is driven to rotate by the pipe fitting, and will not interfere with the rotation of the pipe fitting. In the process of the turning power mechanism 13 driving the clamping mechanism 12 clamped with the pipe fitting to turn over to adjust the pitch angle of the pipe fitting, the roller mechanism 2 with the tapered roller 23b supports the pipe fitting. In the process of turning over the pipe fitting, the position of the contact with the tapered roller 23b will change in the axial direction of the pipe fitting, thereby driving the tapered roller 23b to rotate to avoid jamming. Therefore, through the cooperation of the flip clamping assembly 1 of the two roller structures 2, straight seam welding and circumferential seam welding can be satisfied, and various welding postures of the pipes to be welded can also be satisfied.

[0076] In this embodiment, the lifting drive member 21 can be a hydraulic cylinder, a pneumatic cylinder, an electric cylinder, etc., which is not limited here.

[0077] In one embodiment, Figure 1 and Figure 4 As shown, the submerged arc welding device for pipe fittings integrating girth welding and straight seam welding also includes a roller base 4, and the lifting drive components 21 of the two roller mechanisms 2 are respectively installed on the roller base 4, and the roller base 4 is configured to be able to slide along the axial projection direction of the pipe fitting on the horizontal plane.

[0078] Specifically, considering that the lifting height of the lifting drive member 21 of the roller mechanism 2 is limited, a roller base 4 is provided so that the position of the roller mechanism 2 can be adjusted according to the length of the pipe.

[0079] In one embodiment, Figure 1 As shown, the pipe submerged arc welding device integrating girth welding and straight seam welding also includes a bed frame 5, on which two inner rails 51 and two outer rails 52 are arranged, the clamping base 11 is fixedly mounted on the bed frame 5, the roller base 4 is slidably mounted on the two inner rails 51, and the welding mechanism 3 is slidably mounted on the two outer rails 52, and the inner rails 51 and the outer rails 52 are parallel to each other.

[0080] Specifically, the bed frame 5, the inner track 51 and the outer track 52 are provided to limit the sliding direction of the roller base 4 and the welding mechanism 3, and to ensure that the flip clamping assembly 1 is always aligned with the roller mechanism 2 and the welding mechanism 3, eliminating the trouble of subsequent adjustment and alignment.

[0081] In addition, in order to reduce the sliding resistance of the roller base 4 and the welding mechanism 3 along the corresponding tracks, a plurality of pulleys may be respectively arranged at the lower end of the roller base 4 and the lower end of the welding mechanism 3, and the pulleys may roll in contact with the corresponding tracks to reduce the sliding resistance.

[0082] In one embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the turning power mechanism 13 includes:

[0083] The hydraulic rod 13a is flipped, one end of which is hinged to the clamping base 11, and the other end of which is hinged to the clamping mechanism 12;

[0084] And / or a flip motor assembly 13b, including a flip motor 131b, a half gear 132b and a transmission gear 133b, the half gear 132b is fixedly connected to the clamping mechanism 12, the output shaft of the flip motor 131b is connected to the transmission gear 133b through a reducer to drive the rotation, and the transmission gear 133b is meshed with the half gear 132b.

[0085] Wherein, when the flip hydraulic rod 13a and the flip motor assembly 13b exist at the same time, the flip hydraulic rod 13a assists the clamping mechanism 21 to flip and has a certain supporting effect.

[0086] like Figure 1 , Figure 2 and Figure 3 As shown, the clamping mechanism 12 includes:

[0087] Chuck support 121;

[0088] A chuck 122 is rotatably mounted on the chuck bracket 121;

[0089] A chuck rotation driving mechanism 123 is connected between the chuck support 121 and the chuck 122 and is used to drive the chuck 122 to rotate;

[0090] The inner jaw assembly 124 is disposed on the chuck 122 and is used to clamp the inner wall of the pipe;

[0091] The outer jaw assembly 125 is disposed on the chuck 122 and is used to clamp the outer wall of the pipe.

[0092] Specifically, the inner clamping jaw group 124 clamps the inner wall of the pipe fitting, and the outer clamping jaw group 125 clamps the outer wall of the pipe fitting, and the two cooperate with each other to achieve a firm clamping of the pipe fitting.

[0093] Wherein, when the flip power mechanism 13 includes the flip motor assembly 13b, the half gear 132b rotates synchronously with the chuck 122, and the half gear 132b has the lower half of the gear and is completely covered by the chuck 122. In this way, the structure can still be compact even when the half gear 132b has a large radius.

[0094] like Figure 1 and Figure 2 As shown, the inner jaw group 124 has three inner jaws distributed along the circumference of the chuck 122 and capable of sliding radially along the chuck 122 respectively. The three inner jaws are used to jointly press against the inner circumferential wall of the pipe fitting. The three inner jaws can be pressed against the inner circumferential wall of the pipe fitting under the drive of a power component, or can be locked in the position of pressing against the inner circumferential wall of the pipe fitting by the locking bolts thereon. These are all existing technologies and are not limited here.

[0095] like Figure 1 and Figure 2 As shown, the outer jaw group 125 has three outer jaws distributed along the circumference of the chuck 122 and capable of sliding radially along the chuck 122 respectively. The three outer jaws are used to jointly press against the outer circumferential wall of the pipe fitting. The three inner jaws can be pressed against the outer circumferential wall of the pipe fitting under the drive of the power component, or can be locked in the position of pressing against the outer circumferential wall of the pipe fitting by the locking bolts thereon. These are all existing technologies and are not limited here.

[0096] like Figure 3 As shown, the chuck rotation drive mechanism 123 includes a rotating motor 1231, a driving gear 1232 and a driven gear 1233. The driving gear 1232 is rotatably supported on the chuck bracket 121, and the driven gear 1233 is connected to the chuck 122. The rotating motor 1231 is fixedly mounted on the chuck bracket 121, and the output shaft is connected to the driving gear 1232 to drive the rotation. The driven gear 1233 is meshed with the driving gear 1232, and the chuck 122 is driven to rotate by the driving gear.

[0097] In one embodiment, Figure 1 , Figure 5 and Figure 6 As shown, the pipe submerged arc welding device integrating girth welding and straight seam welding, the welding mechanism 3 includes:

[0098] The movable base 31 can slide along the axial direction of the pipe in the horizontal plane under the drive of its power structure;

[0099] The mounting frame 32 is mounted on the movable base 31, and a power member for driving the mounting frame 32 to move up and down is arranged between the mounting frame 32 and the movable base 31;

[0100] The welding wire supply mechanism 33 includes a welding wire reel 331 and a plurality of welding wire guide wheels 332, at least one welding wire guide wheel 332 is a power guide wheel, and the mounting frame 32 is provided with a welding wire channel 333. The welding wire 6 unwound from the welding wire reel 331 passes through the welding wire channel 333 and is guided by the welding wire guide wheel 332 to a free end facing downward;

[0101] The welding gun 34 is mounted on the mounting frame 32 .

[0102] Specifically, a power member for driving the mounting frame 32 to rise and fall is arranged between the mounting frame 32 and the movable base 31, and the height of the welding gun 34 can be controlled, so that it is suitable for pipes of various postures and diameters, and has a wide range of applications. The welding wire supply structure 33 can also automatically supply welding wire and make the welding wire 6 move downward, eliminating the trouble of feeding the welding wire 6 separately.

[0103] In one embodiment, Figure 1 and Figure 5 As shown, the welding mechanism 3 also includes:

[0104] Two flux barrels 35 are respectively mounted on the mobile base 31, and the flux outlet of one of the flux barrels 35 is connected to the welding gun 34 through a pipeline;

[0105] The flux recovery adsorbent 36 is installed on the movable base 31 and is connected to another flux barrel 35 through a pipeline.

[0106] Specifically, during welding, the flux flows out from the flux outlet of the welding gun 34, and the welding mechanism moves along the welding path relative to the pipe. After welding is completed, the welding mechanism 3 moves along the welding path relative to the pipe again. At the same time, the flux recovery adsorbent 36 uses suction to absorb the corresponding flux on the pipe into the corresponding welding barrel 35.

[0107] In one embodiment, Figure 1 and Figure 5 As shown, there are two movable bases 31 , and the mounting frame 32 includes a cross beam 321 and a longitudinal beam 322 connected to each other. The cross beam 321 is respectively connected to the two movable bases 31 , the welding gun 34 is installed at the head of the longitudinal beam 322 , and the welding wire channel 333 is set on the longitudinal beam 322 .

[0108] Specifically, the two movable bases 31 and the crossbeam 321 of the mounting frame 32 together form a gate-shaped frame, so that the welding mechanism 3 will not be interfered with by the roller mechanism 2 during its movement, and the welding mechanism 3 can also pass through the roller mechanism 2, that is, the roller mechanism can pass through the space of the gate-shaped frame.

[0109] In addition, the welding gun 34 is installed at the head of the longitudinal beam 322, so that the welding gun 34 can be inserted into the pipe through the longitudinal beam 322 to achieve welding of the inner weld.

[0110] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A pipe submerged arc welding device integrating girth welding and straight seam welding, characterized in that: include: A flip clamping assembly (1) comprises a clamping base (11), a clamping mechanism (12) and a flipping power mechanism (13), wherein the clamping mechanism (12) is used to clamp and rotate a pipe to be welded and is rotatably mounted on the clamping base (11), and the flipping power mechanism (13) is used to drive the clamping mechanism (12) to flip so as to adjust the pitch angle of the pipe to be welded; The two roller mechanisms (2) respectively comprise a lifting drive member (21), a roller frame (22) and a roller (23); the lifting drive member (21) is connected to the corresponding roller frame (22) and is used to drive the corresponding roller frame (22) to lift and lower; the roller (23) is rotatably supported on the corresponding roller frame (22); the roller (23) of one roller mechanism (2) is a cylindrical roller (23a) having a plurality of rollers arranged along an arc track and being used to support the pipe through its roller surface and being driven to rotate by the rotating pipe; the roller (23) of the other roller mechanism (2) is a conical roller (23b) having two rollers opposed to each other and being used to support the pipe through its roller surface, with the axial direction being perpendicular to the axial direction of the cylindrical roller (23a); The welding mechanism (3) is configured to be able to slide along the projection direction of the axial direction of the pipe on the horizontal plane, and is used to keep the pipe in place during rotation to perform girth welding on the pipe; and to slide to perform straight seam welding on the pipe when the pipe remains stationary.

2. The pipe submerged arc welding device integrating girth welding and straight seam welding according to claim 1 is characterized in that: It also comprises a roller base (4), on which the lifting drive components (21) of the two roller mechanisms (2) are respectively mounted, and the roller base (4) is configured to be able to slide along the axial direction of the pipe in the projection direction on the horizontal plane.

3. The pipe submerged arc welding device integrating girth welding and straight seam welding according to claim 2 is characterized in that: It also comprises a bed frame (5), on which two inner rails (51) and two outer rails (52) are arranged, the clamping base (11) is fixedly mounted on the bed frame (5), the roller base (4) is slidably mounted on the two inner rails (51), and the welding mechanism (3) is slidably mounted on the two outer rails (52).

4. The pipe submerged arc welding device integrating girth welding and straight seam welding according to claim 1 is characterized in that: The turning power mechanism (13) comprises: A turning hydraulic rod (13a), one end of which is hinged to the clamping base (11), and the other end of which is hinged to the clamping mechanism (12); And / or a flip motor assembly (13b), comprising a flip motor (131b), a half gear (132b) and a transmission gear (133b), wherein the half gear (132b) is fixedly connected to the clamping mechanism (12), and the output shaft of the flip motor (131b) is connected to the transmission gear (133b) via a reducer to drive the rotation, and the transmission gear (133b) is meshed with the half gear (132b).

5. The pipe submerged arc welding device integrating girth welding and straight seam welding according to claim 1 is characterized in that: The clamping mechanism (12) comprises: Chuck support (121); A chuck (122) is rotatably mounted on the chuck bracket (121); A chuck rotation driving mechanism (123), connected between the chuck support (121) and the chuck (122), and used for driving the chuck (122) to rotate; An inner jaw assembly (124) is disposed on the chuck (122) and is used to clamp the inner wall of the pipe; An outer jaw group (125) is arranged on the chuck (122) and is used for clamping the outer wall of the pipe.

6. The pipe submerged arc welding device integrating girth welding and straight seam welding according to claim 1 is characterized in that: The welding mechanism (3) comprises: A movable base (31) is capable of sliding along the projection direction of the axial direction of the pipe on a horizontal plane under the drive of its power structure; A mounting frame (32) is mounted on the movable base (31), and a power component for driving the mounting frame (32) to move up and down is arranged between the mounting frame (32) and the movable base (31); A welding wire supply mechanism (33) comprises a welding wire reel (331) and a plurality of welding wire guide wheels (332), at least one welding wire guide wheel (332) being a powered guide wheel, the mounting frame (32) being provided with a welding wire channel (333), the welding wire (6) unwound from the welding wire reel (331) passing through the welding wire channel (333) is guided by the welding wire guide wheel (332) to a position where the free end faces downward; A welding gun (34) is mounted on the mounting frame (32).

7. The pipe submerged arc welding device integrating girth welding and straight seam welding according to claim 1 is characterized in that: The welding mechanism (3) further comprises: Two flux barrels (35) are respectively mounted on the movable base (31), wherein a flux outlet of one flux barrel (35) is connected to the welding gun (34) through a pipeline; The flux recovery adsorbing member (36) is installed on the movable base (31) and is connected to another flux barrel (35) through a pipeline.

8. The pipe submerged arc welding device integrating girth welding and straight seam welding according to claim 6 is characterized in that: The movable base (31) is provided with two, the mounting frame (32) comprises a cross beam (321) and a longitudinal beam (322) connected to each other, the cross beam (321) is respectively connected to the two movable bases (31), the welding gun (34) is mounted on the head of the longitudinal beam (322), and the welding wire channel (333) is arranged on the longitudinal beam (322).

9. A welding method for a pipe submerged arc welding device integrating girth welding and straight seam welding according to any one of claims 1 to 8, characterized in that: When performing girth welding, the welding methods include: Step S1, the clamping mechanism (12) clamps the pipe to be welded; Step S2, flipping the clamping assembly (1) to keep the axial direction of the pipe extending in the vertical direction; or flipping the pipe to a corresponding pitch angle with the cooperation of the roller mechanism (2) with the conical roller (23b), and then supporting the pipe with the roller mechanism (2) with the cylindrical roller (23a); Step S3, the welding mechanism (3) moves to the welding position, the clamping mechanism (12) drives the pipe to be welded to rotate, and the welding mechanism (3) performs girth welding on the pipe; When performing straight seam welding, the welding methods include: Step S1, the clamping mechanism (12) clamps the pipe to be welded; Step S2, the turning and clamping assembly (1) is turned over in cooperation with the roller mechanism (2) having a conical roller (23b) until the axial direction of the pipe is horizontal; Step S3, the welding mechanism (3) performs straight seam welding on the pipe during the movement.

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