A large-diameter stainless steel elbow welding flipping device and method

Abstract

The present invention relates to the technical field of large-diameter elbow welding, and discloses a large-diameter stainless steel elbow welding flipping device and method, including a main frame. A lifting table is slidably connected to the front of the main frame in a drivable manner. An installation plate is detachably arranged outside the lifting table. A main support plate is fixedly connected to the outside of the installation plate. A support mechanism for fixing the elbow is arranged outside the main support plate; the elbow is fixed and supported through a positioning mechanism. Compared with the traditional method of fixing and installing by welding, the disassembly and assembly of the elbow can be completed more conveniently, and the selectivity and adjustability of the installation and fixation of the elbow are facilitated. The recycling of the positioning mechanism is facilitated, thereby improving the use effect of the welding flipping device. Moreover, the elbow is fixed by the side support frame and the positioning mechanism, and by controlling the center of the side support frame to be coplanar with the center of the elbow joint, it is convenient to control the wire routing of the welding machine through the side support frame, further improving the stability of the wire routing of the welding machine and ensuring the welding quality.

Description

Technical Field

[0001] The present invention relates to the technical field of large-diameter elbow welding, and specifically to a welding turnover device and method for large-diameter stainless steel elbows. Background Technique

[0002] During the use of large-diameter pipelines, large-diameter elbows are required to connect two straight pipes that need to turn. Existing large-diameter elbows are usually composed of welded semi-circular elbow pipes. During the welding process of existing large-diameter elbows, electric welding is usually first performed on the elbows, and then the elbows are installed on a rotatable support device, and then manual control of the welding trolley is used to perform welding operations.

[0003] In a Chinese patent with the patent publication number CN109759770A, a large-diameter elbow welding device is disclosed. It includes a base, a frame is arranged on the base, a slide rail is arranged on the frame in the vertical direction, a slide table is arranged on the slide rail, a rotating platform is arranged at the center of the slide table, a connecting chuck is arranged on the rotating platform, and the connecting chuck includes a fixing plate, and the fixing plate is connected to the rotating platform through a circle of connecting bolts. During the installation process, by welding a connecting support on the outside of the elbow, then controlling the connection between the connecting support and the connecting chuck, and then performing welding operations.

[0004] Although the above patent reduces the operation difficulty of elbow welding, during the installation process, it is still necessary to control the welding of the connecting support and the elbow, which increases the disassembly difficulty of the connecting support and increases the loss of the connecting support. And during the welding process, the elbow rotates while the welding trolley remains relatively stationary, greatly increasing the driving difficulty of the welding wire path. And the overall welding process positioning is directly controlled by the welding process of the elbow and the connecting support. If the elbow is tilted relative to the connecting support during welding and there is a certain angle between the elbow joint and the connecting support, then during the rotation of the elbow, the overall movement trajectory of the elbow joint fluctuates, easily leading to welding distortion or missed welding, thus affecting the final welding effect. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a welding turnover device and method for large-diameter stainless steel elbows, which have the advantages of simple fixed installation of the elbows, accurate positioning, and being convenient for improving welding accuracy and welding quality.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A welding turnover device for large-diameter stainless steel elbows, including a main frame, a lifting table is slidably connected to the front of the main frame in a drivable manner, a mounting plate is detachably arranged outside the lifting table, a main support plate is fixedly connected to the outside of the mounting plate, and a support mechanism for fixing the elbow is arranged outside the main support plate;

[0008] There is a welding mechanism arranged above the support mechanism;

[0009] The support mechanism includes a central rod and two side support frames. An installation rod is fixedly connected to the outside of the side support frame. Connecting heads are hinged to both ends of the central rod. The side support frame is detachably connected to the connecting head of the central rod through the installation rod. A positioning mechanism is arranged on the outside of the side support frame, and the positioning mechanism is used for centering and clamping elbows;

[0010] The positioning mechanism includes a positioning ring slidably connected to the outside of the side support frame. A fixed arm rod is fixedly connected to the outside of the positioning ring. An outer clamping block and an inner positioning block for clamping the pipe orifice of a large elbow are arranged on the outside of the fixed arm rod;

[0011] A driving hydraulic rod for controlling the sliding of the inner positioning block is arranged inside the fixed arm rod. A hydraulic regulation ring for controlling the hydraulic oil of the driving hydraulic rod is fixedly connected inside the positioning ring.

[0012] Preferably: A rotating plate is rotatably connected to the outside of the lifting platform in a drivable manner. The mounting plate is fixedly installed on the outside of the rotating plate through bolts.

[0013] Preferably: Symmetrical arc-shaped support plates are fixedly connected to the outside of the main support plate. A fixed sliding strip is slidably connected to the top of the arc-shaped support plate. The two side support frames are fixedly connected to the outside of the fixed sliding strip through bolts. The two fixed sliding strips are used for adjusting the included angle of the two side support frames.

[0014] Preferably: A clamping bolt is rotatably connected to the outside of the outer clamping block. The clamping bolt is threadedly connected to the fixed arm rod. The inner positioning block is fixedly connected to the driving end of the driving hydraulic rod. There are two groups of fixed arm rods, and the two groups of fixed arm rods are symmetrically distributed on both sides of the positioning ring. Each group of fixed arm rods has at least three.

[0015] Preferably: The number of driving hydraulic rods is adapted to the fixed arm rods. The driving hydraulic rods are all connected to the hydraulic regulation ring. An oil inlet pipe is arranged on the outside of the hydraulic regulation ring. One end of the oil inlet pipe away from the hydraulic regulation ring is provided with a main oil pump. The main oil pump is fixedly connected to the central rod. An oil delivery pipe is arranged on the outside of the main oil pump.

[0016] Preferably: An oil inlet valve is arranged inside the hydraulic regulation ring. A regulating valve block is movably connected inside the oil inlet valve. The oil inlet pipe is communicated with the inner valve cavity of the oil inlet valve. Main oil cavities are opened on both sides of the oil inlet valve. A branch oil cavity is communicated with the outside of the main oil cavity. The branch oil cavity is communicated with the driving hydraulic rod, and hydraulic oil is pumped into the driving hydraulic rod through the branch oil cavity.

[0017] Preferably, on the outer sides of the opposite sides of the two oil distribution chambers, a pressure measurement chamber is connected. A pressure balance rod is movably connected between the two pressure measurement chambers. A return spring is arranged between the two sides of the pressure balance rod and the positioning ring. The middle part of the pressure balance rod is movably connected with a connecting dial. The connecting dial is rotatably connected inside the positioning ring. One end of the connecting dial away from the pressure balance rod is movably connected with the regulating valve block.

[0018] Preferably, a support slider is slidably connected to the outside of the side support frame. A support rod is hinged to the outside of the support slider. The top of the support rod is hinged to the welding machine guide rail. The welding mechanism includes a welding machine slidably connected to the outside of the welding machine guide rail. The bottom of the welding machine is fixedly connected with a telescopic rod. The bottom of the telescopic rod is provided with a support pulley and a welding head. A welding positioning rod is fixedly connected to the outside of the positioning ring. The end of the welding positioning rod is fixedly connected with a support piece. The support piece is electrically connected to the welding machine.

[0019] Preferably, a deviation switch is arranged inside the positioning ring. The deviation switch is movably connected with the connecting dial. The deviation switch is electrically connected to the welding machine.

[0020] A welding and flipping method for large-diameter stainless steel elbows, the steps of which include:

[0021] S1. Select two semi-finished elbows, and perform spot welding on the two elbows after closing the mold to complete the preparation of the semi-finished materials of the elbows.

[0022] S2. Separate the mounting plate and the lifting table, and connect the elbow semi-finished product to the mounting plate through the outer clamping block and the inner positioning block. Adjust the position of the elbow so that the seams on both sides of the elbow semi-finished product are in a vertical state. Then, fix the position of the elbow semi-finished product and the mounting plate by adjusting the outer clamping block and the inner positioning block to complete the assembly of the elbow semi-finished product.

[0023] S3. Start the external hoisting equipment, complete the assembly of the mounting plate and the lifting table, and fix the mounting plate and the lifting table with bolts. Then, place the welding mechanism above the elbow and start the welding operation.

[0024] S4. After the welding mechanism completes the welding of one side seam of the elbow semi-finished product, separate the welding mechanism and the elbow, control the lifting table and the mounting plate, adjust the mounting plate to rotate by °, complete the flipping adjustment of the elbow, and then reinstall the welding mechanism above the elbow to start the welding operation of the other side weld.

[0025] Preferably, the angle adjustment between the side support frame and the central rod is adapted to the angle of the elbow. After the outer clamping block and the inner positioning block are fixed to the elbow pipe orifice, the positioning ring is parallel to the elbow pipe orifice.

[0026] The beneficial effects of the present invention:

[0027] 1. The large-diameter stainless steel elbow welding and flipping device and method fix and support the elbow through the positioning mechanism. Compared with the traditional method of fixing and installing by welding, it can disassemble and assemble the elbow more conveniently, improve the selectivity and adjustability of the elbow installation and fixation, facilitate the recycling of the positioning mechanism, and thus improve the use effect of the welding and flipping device. And the elbow is fixed by the side support frame and the positioning mechanism, and by controlling the center of the side support frame to be coplanar with the center of the elbow joint, it is convenient to control the wire routing of the welding machine through the side support frame, further improve the stability of the wire routing of the welding machine, and ensure the welding quality.

[0028] 2. The large-diameter stainless steel elbow welding and flipping device and method achieve the balance of the clamping force of each inner positioning block on the elbow when clamping the elbow through the adjustment of the regulating valve block and the pressure balance rod, so as to ensure the stability of the elbow clamping and the fixing effect of the elbow.

[0029] 3. The large-diameter stainless steel elbow welding and flipping device and method, through the action of the pressure balance rod and the offset switch, when the welded elbow has a welding break and dislocation, the clamping of the elbow by the fixed arm rod is misaligned, resulting in a pressure difference in the internal pressure of the two side oil chambers. The pressure balance rod deflects under the action of the oil pressure difference, and the pressure balance rod drives the regulating valve block to deflect through the connecting dial, thereby triggering the offset switch. The offset switch controls the welding mechanism to stop working, effectively avoiding the occurrence of miswelding of the elbow during the welding process, and thus ensuring the welding quality of the elbow. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the main part of the device of the present invention and the state of installing the elbow;

[0031] Figure 2 Schematic diagram of the main part of the device of the present invention;

[0032] Figure 3 Schematic diagram of the connection between the mounting plate and the support mechanism of the present invention;

[0033] Figure 4 Schematic diagram of the connection between the central rod, the side support frame and the positioning mechanism of the present invention;

[0034] Figure 5 Schematic cross-sectional view of the hydraulic adjustment ring of the present invention;

[0035] Figure 6 For the present invention Figure 5 Enlarged schematic diagram of part A;

[0036] Figure 7 Schematic diagram of the connection between the oil inlet valve, the pressure balance rod, the connecting dial and the regulating valve block of the present invention;

[0037] Figure 8This is a schematic diagram showing the connection between the connecting dial and the offset switch of the present invention.

[0038] In the figure: 1, main frame; 2, lifting table; 21, rotating plate; 3, mounting plate; 31, main support plate; 32, arc-shaped support plate; 33, fixed slide bar;

[0039] 4, support mechanism;

[0040] 41, central rod; 42, side support frame; 421, mounting rod; 43, positioning mechanism; 44, positioning ring; 45, fixed arm rod; 46, outer clamping block; 47, inner positioning block; 48, driving hydraulic rod; 49, hydraulic adjusting ring; 410, welding positioning rod; 411, support sheet; 412, main oil pump;

[0041] 491, oil inlet valve; 492, oil inlet pipe; 493, regulating valve block; 494, main oil cavity; 495, oil distribution cavity; 496, pressure measurement cavity; 497, pressure balance rod; 498, return spring; 499, connecting dial; 4910, offset switch;

[0042] 5, welding mechanism;

[0043] 51, welding machine; 52, telescopic rod; 53, support pulley; 54, welding head;

[0044] 6, support slider; 61, support rod; 62, welding machine guide rail;

[0045] 7, oil pipeline. Detailed implementation mode

[0046] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] Example 1, please refer to Figure 1 - Figure 4 , a large-diameter stainless steel elbow welding and flipping device, including a main frame 1, a lifting table 2 is slidably connected to the front of the main frame 1 in a drivable manner, a mounting plate 3 is detachably arranged outside the lifting table 2, a main support plate 31 is fixedly connected to the outside of the mounting plate 3, and a support mechanism 4 for fixing the elbow is arranged outside the main support plate 31;

[0048] A welding mechanism 5 is arranged above the support mechanism 4;

[0049] The support mechanism 4 includes a central rod 41 and two side support frames 42. An installation rod 421 is fixedly connected to the outside of the side support frame 42. Connecting heads are hinged to both ends of the central rod 41. The side support frame 42 is detachably connected to the connecting head of the central rod 41 through the installation rod 421. A positioning mechanism 43 is arranged on the outside of the side support frame 42, and the positioning mechanism 43 is used for centering and clamping the elbow.

[0050] The positioning mechanism 43 includes a positioning ring 44 slidably connected to the outside of the side support frame 42. A fixed arm rod 45 is fixedly connected to the outside of the positioning ring 44. An outer clamping block 46 and an inner positioning block 47 for clamping the pipe orifice of the large elbow are arranged on the outside of the fixed arm rod 45.

[0051] A driving hydraulic rod 48 for controlling the sliding of the inner positioning block 47 is arranged inside the fixed arm rod 45. A hydraulic regulation ring 49 for controlling the hydraulic oil of the driving hydraulic rod 48 is fixedly connected to the inside of the positioning ring 44.

[0052] During the welding process, separate the side support frame 42 and the central rod 41, and then assemble the side support frame 42 and the central rod 41 inside the semi-finished elbow.

[0053] It should be noted that the installation rod 421 includes a lead screw arranged inside. During the connection process of the side support frame 42 and the central rod 41, it is threadedly connected to the end connecting head of the central rod 41 through the lead screw.

[0054] Reference Figure 1 and Figure 2 Referring to

[0055] In an alternative embodiment, a rotatable plate 21 is drivably connected to the outside of the lifting platform 2, and the mounting plate 3 is fixedly installed on the outside of the rotatable plate 21 through bolts.

[0056] It should be noted that a connection slot and a buckle are arranged between the mounting plate 3 and the rotatable plate 21. During the connection of the mounting plate 3 to the rotatable plate 21, the slot and the buckle cooperate with each other, and then it is fixed through bolts.

[0057] Reference Figure 3 Referring to

[0058] It should be noted that when assembling the side support frame 42, the side support frame 42 is connected to the fixed slide bar 33 by bolts, and the centers of the two arc-shaped support plates 32 coincide. When adjusting the included angle between the two side support frames 42, both ends of the side support frame 42 fall on the arc-shaped support plate 32. When the elbow is installed, the included angle of the side support frame 42 is adapted to the included angle of the elbow, and at the same time, the elbow is supported and fixed by the fixed slide bar 33 and the arc-shaped support plate 32.

[0059] Reference Figure 4 , in an optional embodiment, a clamping bolt is rotatably connected to the outside of the outer clamping block 46, the clamping bolt is threadedly connected to the fixed arm rod 45, the inner positioning block 47 is fixedly connected to the driving end of the driving hydraulic rod 48, there are two groups of fixed arm rods 45, and the two groups of fixed arm rods 45 are symmetrically distributed on both sides of the positioning ring 44, and each group of fixed arm rods 45 has at least three.

[0060] It should be noted that when fixing the elbow, control the outer clamping block 46 to abut against the outer pipe edge of the elbow, and then perform preliminary positioning and fixing by controlling the clamping bolt.

[0061] Then, by controlling the driving hydraulic rod 48, the driving hydraulic rod 48 drives the inner positioning block 47 to slide outward on the fixed arm rod 45, so that the inner positioning block 47 fixedly clamps the elbow. When the fixing of the elbow is completed, the positioning ring 44 is flush with the elbow pipe orifice. When the positioning rings 44 on both sides of the elbow are both clamped and fixed with the elbow pipe orifice, the fixing of the elbow to the mounting plate 3 is completed.

[0062] Moreover, the fixed arm rod 45 and the inner positioning block 47 are symmetric on both sides. When the fixed arm rod 45 fixes the elbow through the inner positioning block 47, the centers of the positioning ring 44 and the elbow pipe orifice are collinear. Thus, when the two positioning rings 44 complete the fixing of the elbow, the center lines of the side support frame 42 and the central rod 41 and the joint center on both sides of the elbow are coplanar, thereby ensuring the stability of the position when fixing the elbow, and further ensuring the stable routing of the welding mechanism 5 during the welding process, avoiding the deviation or distortion of the welding routing, and effectively ensuring the welding quality.

[0063] Reference Figure 3 , in an optional embodiment, the number of driving hydraulic rods 48 is adapted to the fixed arm rod 45, the driving hydraulic rods 48 are all connected to the hydraulic adjustment ring 49, an oil inlet pipe 492 is arranged outside the hydraulic adjustment ring 49, and the end of the oil inlet pipe 492 away from the hydraulic adjustment ring 49 is provided with a main pump oiler 412, the main pump oiler 412 is fixedly connected to the central rod 41, and an oil delivery pipe 7 is arranged outside the main pump oiler 412.

[0064] It should be noted that the hydraulic adjustment ring 49 is used to connect a plurality of driving hydraulic rods 48, and the hydraulic adjustment ring 49 is used to control the stability of the oil pumping of the plurality of driving hydraulic rods 48, ensuring the stability of the positioning and clamping of the inner positioning block 47 on the elbow.

[0065] Example 2, refer to Figure 3 and Figures 5 - 8 On the basis of Example 1, further, an oil inlet valve 491 is provided inside the hydraulic adjustment ring 49. A regulating valve block 493 is movably connected inside the oil inlet valve 491. The oil inlet pipe 492 communicates with the valve cavity inside the oil inlet valve 491. Main oil cavities 494 are provided on both sides of the oil inlet valve 491. An oil distribution cavity 495 communicates with the outside of the main oil cavity 494. The oil distribution cavity 495 communicates with the driving hydraulic rod 48. The hydraulic oil is pumped into the driving hydraulic rod 48 through the oil distribution cavity 495.

[0066] When controlling the driving hydraulic rod 48 to start, the main oil pump 412 pumps oil into the oil inlet valve 491 through the oil inlet pipe 492. The hydraulic oil flows into the main oil cavities 494 on both sides through the oil inlet valve 491, then flows into the oil distribution cavity 495 through the main oil cavity 494, and then enters the driving hydraulic rod 48 through the oil distribution cavity 495 to make the driving hydraulic rod 48 work.

[0067] Refer to Figure 6 In an alternative embodiment, pressure measurement cavities 496 communicate with the outside of the opposite sides of the two oil distribution cavities 495. A pressure balance rod 497 is movably connected between the two pressure measurement cavities 496. Return springs 498 are provided between both sides of the pressure balance rod 497 and the positioning ring 44. A connecting dial 499 is movably connected to the middle of the pressure balance rod 497. The connecting dial 499 is rotatably connected inside the positioning ring 44. One end of the connecting dial 499 away from the pressure balance rod 497 is movably connected to the regulating valve block 493.

[0068] When the hydraulic oil enters the oil distribution cavity 495, the oil distribution cavity 495 communicates with the pressure measurement cavity 496. Therefore, the oil pressure inside the pressure measurement cavity 496 is the same as that inside the oil distribution cavity 495. Therefore, when the driving hydraulic rod 48 pushes the inner positioning block 47 with the same pressure, the internal pressure of the two pressure measurement cavities 496 is balanced, the pressure balance rod 497 remains stable, and the pressure balance rod 497 drives the regulating valve block 493 to be stable through the connecting dial 499, so that the oil inlet valve 491 supplies oil to the main oil cavities 494 on both sides evenly.

[0069] During the clamping process, when one side of the inner positioning block 47 contacts the inner wall of the elbow, the internal pressure of the driving hydraulic rod 48 increases, and the corresponding internal pressure of the oil distribution cavity 495 increases, resulting in the pressure imbalance of the two pressure measurement cavities 496 inside. The internal pressure balance rod 497 deflects under the action of the hydraulic pressure difference. The pressure balance rod 497 drives the regulating valve block 493 to deflect towards the high-pressure oil distribution cavity 495 through the connecting dial 499, thereby reducing or blocking the flow of hydraulic oil to the main oil cavity 494 on the high-pressure side. Then, the low-pressure main oil cavity 494 side continues to replenish oil until the pressures of the main oil cavities 494 on both sides are balanced, and the regulating valve block 493 resets to the central position of the oil inlet valve 491.

[0070] Through the adjustment of the regulating valve block 493 and the pressure balance rod 497, when clamping the elbow, the balance of the clamping force of each inner positioning block 47 on the elbow is ensured, so as to ensure the stability of the elbow clamping and the fixing effect of the elbow.

[0071] Among them, the outer clamping block 46 is used to determine the outer diameter of the elbow to ensure the centering clamping of the elbow. The outer clamping block 46 plays an auxiliary role in fixing the elbow, further improving the fixing effect during the welding process of the elbow.

[0072] Reference Figure 3 , in an optional embodiment, a support slider 6 is slidably connected to the outside of the side support frame 42. A support rod 61 is hinged to the outside of the support slider 6. The top of the support rod 61 is hinged to a welding machine guide rail 62. The welding mechanism 5 includes a welding machine 51 slidably connected to the outside of the welding machine guide rail 62. A telescopic rod 52 is fixedly connected to the bottom of the welding machine 51. A support pulley 53 and a welding head 54 are arranged at the bottom of the telescopic rod 52. A welding positioning rod 410 is fixedly connected to the outside of the positioning ring 44. A support piece 411 is fixedly connected to the end of the welding positioning rod 410. The support piece 411 is electrically connected to the welding machine 51.

[0073] Furthermore, a deviation switch 4910 is arranged inside the positioning ring 44. The deviation switch 4910 is movably connected to a connection dial 499. The deviation switch 4910 is electrically connected to the welding machine 51.

[0074] When the clamping and installation are completed, the deviation switch 4910 is started. The deviation switch 4910 is used to monitor the fixed state of the elbow during the welding process.

[0075] During the fixed clamping process, when the welded elbow has a welding break and dislocation, the clamping of the elbow by the fixed arm rod 45 is misaligned. The pressure of the inner positioning block 47 in the empty clamping state is reduced relative to the inner positioning block 47 in the clamping state, resulting in a pressure difference inside the two side oil chambers 495. The pressure balance rod 497 deflects under the action of the oil pressure difference. The pressure balance rod 497 drives the regulating valve block 493 to deflect through the connection dial 499, thereby triggering the deviation switch 4910. The deviation switch 4910 controls the welding mechanism 5 to stop working, effectively avoiding the occurrence of miswelding of the elbow during the welding process, and thus ensuring the welding quality of the elbow.

[0076] During welding, the welding machine 51 moves above the unsealed elbow through the support pulley 53, and the welding machine 51 slides on the welding machine guide rail 62. The welding machine guide rail 62 is installed outside the side support frame 42 by the support slider 6 and the support rod 61, so that the moving direction of the welding machine 51 is parallel to the direction of the elbow joint, ensuring the stability of the welding process of the welding machine 51, reducing the trouble of manually controlling the moving direction of the welding machine 51, and improving the welding quality.

[0077] When welding the other side joint of the welded elbow, separate the support rod 61 and the support slider 6, then control the lifting platform 2 and the rotating plate 21, control the elbow to flip, reconnect the support rod 61 and the support slider 6, and place the welding machine 51 above the elbow joint again to perform the welding operation on the other side elbow joint.

[0078] Embodiment 3, a method for welding and flipping a large-diameter stainless steel elbow, the steps of which include:

[0079] S1. Select two semi-finished elbows, and perform mold clamping and spot welding on the two elbows to complete the preparation of the semi-finished elbows.

[0080] S2. Separate the mounting plate 3 and the lifting platform 2, connect the semi-finished elbow to the mounting plate 3 through the outer clamping block 46 and the inner positioning block 47, adjust the position of the elbow so that the two side joints of the semi-finished elbow are in a vertical state, and then fix the positions of the semi-finished elbow and the mounting plate 3 by adjusting the outer clamping block 46 and the inner positioning block 47 to complete the assembly of the semi-finished elbow.

[0081] S3. Start the external hoisting equipment, complete the assembly of the mounting plate 3 and the lifting platform 2, and fix the mounting plate 3 and the lifting platform 2 with bolts. Then place the welding mechanism 5 above the elbow and start the welding operation.

[0082] S4. After the welding mechanism 5 completes the welding of one side joint of the semi-finished elbow, separate the welding mechanism 5 and the elbow, control the lifting platform 2 and the mounting plate 3, adjust the mounting plate 3 to rotate 180°, and after completing the flipping adjustment of the elbow, reinstall the welding mechanism 5 above the elbow and start the welding operation on the other side weld.

[0083] Preferably: The angle adjustment between the side support frame 42 and the central rod 41 is adapted to the elbow angle. After the outer clamping block 46 and the inner positioning block 47 are fixed to the elbow pipe orifice, the positioning ring 44 is parallel to the elbow pipe orifice.

[0084] Fixing and supporting the elbow through the positioning mechanism 43 can, compared with the traditional method of fixing and installing by welding, more conveniently complete the disassembly and assembly of the elbow, and is convenient for improving the selectivity and adjustability of the installation and fixing of the elbow, facilitating the recycling of the positioning mechanism 43, and thus improving the use effect of the welding and flipping device.

[0085] Moreover, the elbow is fixed by the side support frame 42 and the positioning mechanism 43, and by controlling the center of the side support frame 42 to be coplanar with the center of the elbow joint, it is convenient to control the wire routing of the welding machine 51 through the side support frame 42, further improving the stability of the wire routing of the welding machine 51 and ensuring the welding quality.

[0086] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-diameter stainless steel elbow welding and flipping device, comprising a main frame (1), on the front of the main frame (1) there is a slidably connected lifting platform (2) that can be driven, and an installation plate (3) is detachably arranged outside the lifting platform (2), characterized in that: The outside of the mounting plate (3) is fixedly connected with a main support plate (31), and a support mechanism (4) for fixing the elbow is arranged outside the main support plate (31); A welding mechanism (5) is arranged above the support mechanism (4); The support mechanism (4) includes a central rod (41) and two side support frames (42). The outside of the side support frame (42) is fixedly connected with a mounting rod (421). The two ends of the central rod (41) are hinged with connecting heads. The side support frame (42) is detachably connected to the connecting heads of the central rod (41) through the mounting rod (421). A positioning mechanism (43) is arranged outside the side support frame (42), and the positioning mechanism (43) is used for centering and clamping the elbow; The positioning mechanism (43) includes a positioning ring (44) slidably connected to the outside of the side support frame (42). The outside of the positioning ring (44) is fixedly connected with a fixed arm rod (45). An outer clamping block (46) and an inner positioning block (47) for clamping the large elbow pipe orifice are arranged outside the fixed arm rod (45); A driving hydraulic rod (48) for controlling the sliding of the inner positioning block (47) is arranged inside the fixed arm rod (45), and a hydraulic regulating ring (49) for controlling the hydraulic oil of the driving hydraulic rod (48) is fixedly connected to the inside of the positioning ring (44); The number of the driving hydraulic rods (48) is adapted to the fixed arm rod (45). The driving hydraulic rods (48) are all communicated with the hydraulic regulating ring (49). An oil inlet pipe (492) is arranged outside the hydraulic regulating ring (49). One end of the oil inlet pipe (492) far away from the hydraulic regulating ring (49) is provided with a main oil pump (412). The main oil pump (412) is fixedly connected to the central rod (41), and an oil delivery pipe (7) is arranged outside the main oil pump (412); An oil inlet valve (491) is arranged inside the hydraulic regulating ring (49). A regulating valve block (493) is movably connected inside the oil inlet valve (491). The oil inlet pipe (492) is communicated with the inner valve cavity of the oil inlet valve (491). Main oil cavities (494) are arranged on both sides of the oil inlet valve (491). A branch oil cavity (495) is communicated with the outside of the main oil cavity (494). The branch oil cavity (495) is communicated with the driving hydraulic rod (48), and the hydraulic oil is pumped into the driving hydraulic rod (48) through the branch oil cavity (495); Pressure measuring cavities (496) are communicated with the opposite sides of the two branch oil cavities (495). A pressure balance rod (497) is movably connected between the two pressure measuring cavities (496). A return spring (498) is arranged between both sides of the pressure balance rod (497) and the positioning ring (44). A connecting dial (499) is movably connected to the middle of the pressure balance rod (497). The connecting dial (499) is rotatably connected to the inside of the positioning ring (44). One end of the connecting dial (499) far away from the pressure balance rod (497) is movably connected to the regulating valve block (493).

2. The large-diameter stainless steel elbow welding and flipping device according to claim 1, characterized in that: The outside of the lifting table (2) is rotatably connected with a rotating plate (21) that can be driven, and the mounting plate (3) is fixedly installed on the outside of the rotating plate (21) by bolts.

3. A large-diameter stainless steel elbow welding and flipping device according to claim 1, characterized in that: Symmetrical arc-shaped support plates (32) are fixedly connected to the outside of the main support plate (31). A fixed sliding bar (33) is slidably connected to the top of the arc-shaped support plate (32). The two side support frames (42) are fixedly connected to the outside of the fixed sliding bar (33) by bolts. The two fixed sliding bars (33) are used to adjust the included angle of the two side support frames (42).

4. A large-diameter stainless steel elbow welding and flipping device according to claim 1, characterized in that: A clamping bolt is rotatably connected to the outside of the outer clamping block (46). The clamping bolt is threadedly connected to the fixed arm rod (45). The inner positioning block (47) is fixedly connected to the driving end of the driving hydraulic rod (48). There are two groups of fixed arm rods (45), and the two groups of fixed arm rods (45) are symmetrically distributed on both sides of the positioning ring (44). Each group of fixed arm rods (45) has at least three.

5. A large-diameter stainless steel elbow welding and flipping device according to claim 1, characterized in that: A support slider (6) is slidably connected to the outside of the side support frame (42). A support rod (61) is hinged to the outside of the support slider (6). The top of the support rod (61) is hinged to a welding machine guide rail (62). The welding mechanism (5) includes a welding machine (51) slidably connected to the outside of the welding machine guide rail (62). The bottom of the welding machine (51) is fixedly connected to a telescopic rod (52). The bottom of the telescopic rod (52) is provided with a support pulley (53) and a welding head (54). A welding positioning rod (410) is fixedly connected to the outside of the positioning ring (44). The end of the welding positioning rod (410) is fixedly connected to a support piece (411). The support piece (411) is electrically connected to the welding machine (51).

6. The large-diameter stainless steel elbow welding and flipping device according to claim 5, characterized in that: A deviation switch (4910) is arranged inside the positioning ring (44). The deviation switch (4910) is movably connected to a connection dial (499). The deviation switch (4910) is electrically connected to the welding machine (51).

7. A welding flipping method for large-diameter stainless steel elbows, according to a large-diameter stainless steel elbow welding flipping device described in any one of claims 1-6, characterized in that, The steps include: S1. Select two semi-finished elbows, and perform mold closing and spot welding on the two elbows to complete the preparation of the semi-finished elbows of the elbow. S2. Separate the mounting plate (3) and the lifting table (2), and connect the semi-finished elbow to the mounting plate (3) through the outer clamping block (46) and the inner positioning block (47). Adjust the position of the elbow so that the seams on both sides of the semi-finished elbow are in a vertical state. Then, fix the position of the semi-finished elbow and the mounting plate (3) by adjusting the outer clamping block (46) and the inner positioning block (47) to complete the assembly of the semi-finished elbow. S3. Start the external lifting equipment to complete the assembly of the mounting plate (3) and the lifting table (2), and fixedly install the mounting plate (3) and the lifting table (2) by bolts. Then, place the welding mechanism (5) above the elbow and start the welding operation. S4. After the welding mechanism (5) completes the welding of one side seam of the semi-finished elbow, separate the welding mechanism (5) and the elbow, control the lifting table (2) and the mounting plate (3), adjust the mounting plate (3) to rotate 180°, and after completing the flipping adjustment of the elbow, reinstall the welding mechanism (5) above the elbow and start the welding operation on the other side weld.

Images