Large-diameter stainless steel elbow welding turnover device and method

Abstract

The invention relates to the technical field of large-diameter elbow welding, and discloses a large-diameter stainless steel elbow welding turnover device and method.The large-diameter stainless steel elbow welding turnover device comprises a main rack, a lifting table is slidably connected to the front face of the main rack in a drivable mode, a mounting plate is detachably arranged outside the lifting table, and a main supporting plate is fixedly connected to the outside of the mounting plate; a supporting mechanism for fixing an elbow is arranged outside the main supporting plate; the elbow is fixed and supported through the positioning mechanism, and compared with a traditional mode that the elbow is fixedly installed through welding, disassembly and assembly of the elbow can be more conveniently completed, the installation and fixation optionality and adjustability of the elbow can be conveniently improved, recycling of the positioning mechanism is facilitated, and then the using effect of the welding turnover device is improved. And the elbow is fixed through the side supporting frame and the positioning mechanism, and the center of the side supporting frame is controlled to be coplanar with the center of the elbow joint, so that the wiring of the welding machine is conveniently controlled through the side supporting frame, the wiring stability of the welding machine is further improved, and the welding quality is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of large-diameter elbow welding, and in particular to a large-diameter stainless steel elbow welding flipping device and method. Background Art

[0002] In the process of using large-diameter pipes, large-diameter elbows are required to connect two straight pipes that need to be bent. Existing large-diameter elbows are usually welded by semicircular elbow pipes. In the welding process of existing large-diameter elbows, it is usually necessary to first perform electric welding on the elbow, and then install the elbow on a reversible support device, and then manually control the welding trolley to perform the welding operation.

[0003] In the Chinese patent with the patent publication number CN109759770A, a large-caliber elbow welding device is disclosed, which 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 card seat is arranged on the rotating platform, and the connecting card seat includes a fixed plate, and the fixed plate is connected to the rotating platform through a circle of connecting bolts. During the installation process, the connecting support is welded on the outside of the elbow, and then the control connecting support is connected to the connecting card seat, and then the welding operation is performed.

[0004] Although the above patent reduces the operational difficulty of elbow welding, it is still necessary to control the connection support and elbow welding during the installation process, which increases the difficulty of disassembling the connection support and increases the loss of the connection support. In addition, during the welding process, the elbow is rotating, while the welding trolley is relatively stationary, which greatly increases the driving difficulty of the welding line, and the overall welding process positioning is directly controlled by the welding process of the elbow and the connection support. If the elbow is tilted relative to the connection support during welding, and there is a certain angle between the elbow joint and the connection support, then during the rotation of the elbow, the overall movement trajectory of the elbow joint fluctuates, which can easily lead to welding distortion or welding leakage, thereby affecting the final welding effect. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a large-caliber stainless steel elbow welding flipping device and method, which has the advantages of simple elbow fixing and installation, accurate positioning, and is convenient for improving welding accuracy and welding quality.

[0006] To achieve the above object, the present invention provides the following technical solutions: A large-caliber stainless steel elbow welding flip device comprises a main frame, the front of the main frame is drivably connected to a lifting platform, the outside of the lifting platform is detachably provided with a mounting plate, the outside of the mounting plate is fixedly connected to a main support plate, and the outside of the main support plate is provided with a support mechanism for fixing the elbow; A welding mechanism is arranged above the supporting mechanism; The support mechanism includes a center rod and two side support frames, the outside of the side support frames is fixedly connected with a mounting rod, both ends of the center rod are hinged with connectors, the side support frames are detachably connected through the connectors of the mounting rod and the center rod, and a positioning mechanism is arranged on the outside of the side support frames, and the positioning mechanism is used for centering and clamping the elbow; The positioning mechanism comprises a positioning ring slidably connected to the outside of the side support frame, the outside of the positioning ring is fixedly connected to a fixed arm, and the outside of the fixed arm is provided with an outer clamping block and an inner positioning block for clamping the large elbow pipe opening; A driving hydraulic rod for controlling the sliding of the inner positioning block is arranged inside the fixed arm, and a hydraulic regulating ring for controlling the hydraulic oil of the driving hydraulic rod is fixedly connected inside the positioning ring.

[0007] Preferably, the outside of the lifting platform is drivably rotatably connected to a rotating plate, and the mounting plate is fixedly mounted on the outside of the rotating plate by bolts.

[0008] Preferably: a symmetrical arc-shaped support plate is fixedly connected to the outside of the main support plate, a fixed slide bar is slidably connected to the top of the arc-shaped support plate, and the side support frames on both sides are fixedly connected to the outside of the fixed slide bar by bolts, and the fixed slide bars on both sides are used to slide on the arc-shaped support plate to adjust the angle of the side support frames on both sides.

[0009] Preferably: the external rotation connection of the outer clamping block is provided with a clamping bolt, the clamping bolt and the fixed arm are threadedly connected, the inner positioning block is fixedly connected to the driving end of the driving hydraulic rod, the fixed arm is provided with two groups, the two groups of fixed arm are symmetrically distributed on both sides of the positioning ring, and each group of the fixed arm is provided with at least three.

[0010] Preferably: the number of driving hydraulic rods and the fixed arm rod, the driving hydraulic rods are all connected to the hydraulic adjustment ring, the outside of the hydraulic adjustment ring is provided with an oil inlet pipe, the end of the oil inlet pipe away from the hydraulic adjustment ring is provided with a main oil pump, the main oil pump is fixedly connected to the center rod, and the outside of the main oil pump is provided with an oil delivery pipe.

[0011] Preferably: an oil inlet valve is provided inside the hydraulic adjustment ring, and an adjusting valve block is movably connected inside the oil inlet valve, the oil inlet pipe is connected to the valve cavity inside the oil inlet valve, main oil chambers are opened on both sides of the oil inlet valve, and the outside of the main oil chamber is connected to an oil separation chamber, the oil separation chamber is connected to the driving hydraulic rod, and the hydraulic oil is pumped into the driving hydraulic rod through the oil separation chamber.

[0012] Preferably: the opposite sides of the oil separation chambers on both sides are externally connected with pressure measuring chambers, a pressure balance rod is movably connected between the pressure measuring chambers on both sides, a reset spring is arranged between the two sides of the pressure balance rod and the positioning ring, a connecting paddle is movably connected to the middle part of the pressure balance rod, the connecting paddle is rotatably connected to the inside of the positioning ring, and the end of the connecting paddle away from the pressure balance rod is movably connected to the regulating valve block.

[0013] Preferably: the outside of the side support frame is slidably connected to a support slider, the outside of the support slider is hinged with a support rod, the top of the support rod is hinged with a welding machine guide rail, the welding mechanism includes a welding machine that can be driven to slide and connect to the outside of the welding machine guide rail, the bottom of the welding machine is fixedly connected to a telescopic rod, the bottom of the telescopic rod is provided with a support pulley and a welding head, the outside of the side positioning ring is fixedly connected to a welding positioning rod, the end of the welding positioning rod is fixedly connected to a support plate, and the support plate is electrically connected to the welding machine.

[0014] Preferably, a bias switch is arranged inside the positioning ring, the bias switch is movably connected to the connecting paddle, and the bias switch is electrically connected to the welding machine.

[0015] A large-caliber stainless steel elbow welding flipping method, the steps of which include: S1. Select two semi-finished elbows, and spot weld the two elbows together to complete the semi-finished elbow material preparation; S2, separate the mounting plate and the lifting platform, and connect the semi-finished elbow to the mounting plate through the outer clamp block and the inner positioning block, adjust the position of the elbow so that the seams on both sides of the semi-finished elbow are in a vertical state, and then fix the position of the semi-finished elbow and the mounting plate by adjusting the outer clamp block and the inner positioning block to complete the assembly of the semi-finished elbow; S3. Start the external lifting equipment, complete the assembly of the mounting plate and the lifting platform, fix the mounting plate and the lifting platform with bolts, and then place the welding mechanism above the elbow to start the welding operation; S4. After the welding mechanism completes the welding of the seam on one side of the semi-finished elbow, separate the welding mechanism and the elbow, control the lifting platform and the mounting plate, adjust the rotation of the mounting plate, complete the flip adjustment of the elbow, reinstall the welding mechanism on the top of the elbow, and start the welding operation of the weld on the other side.

[0016] Preferably, the angle adjustment between the side support frame and the center rod is adapted to the angle of the elbow, and after the outer clamp block, the inner positioning block and the elbow pipe mouth are fixed, the positioning ring and the elbow pipe mouth are parallel.

[0017] Beneficial effects of the present invention: 1. The large-caliber stainless steel elbow welding flip device and method fixes and supports the elbow through a positioning mechanism. Compared with the traditional method of fixing and installing by welding, it is more convenient to complete the disassembly and assembly of the elbow, and it is convenient to improve the optionality and adjustability of the elbow installation and fixation, and it is convenient to recycle the positioning mechanism, thereby improving the use effect of the welding flip device. The elbow is fixed by a side support frame and a positioning mechanism, and the center of the side support frame is controlled to be coplanar with the center of the elbow joint, so that it is convenient to control the routing of the welding machine through the side support frame, further improve the stability of the routing of the welding machine, and ensure the quality of welding.

[0018] 2. The large-diameter stainless steel elbow welding flipping device and method, through the regulating effect of the regulating valve block and the pressure balance rod, can ensure the balance of the force applied to the elbow by each inner positioning block when clamping the elbow, thereby ensuring the stability of the elbow clamping and the fixing effect of the elbow.

[0019] 3. The large-diameter stainless steel elbow welding flipping device and method, through the action of the pressure balance rod and the offset switch, when the electric welded elbow is broken and misaligned, the fixed arm rod clamps the elbow misaligned, resulting in a pressure difference in the internal pressure of the oil chambers on both sides. The pressure balance rod shifts under the action of the oil pressure difference, and the pressure balance rod drives the regulating valve block to shift through the connecting paddle, thereby triggering the offset switch. The offset switch controls the welding mechanism to stop working, thereby effectively avoiding the occurrence of miswelding of the elbow during welding, thereby ensuring the quality of elbow welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main body of the equipment of the present invention and the installation elbow state; Figure 2 It is a schematic diagram of the main part of the device of the present invention; Figure 3 This is a schematic diagram of the connection between the mounting plate and the supporting mechanism of the present invention; Figure 4 It is a schematic diagram of the connection between the center rod, the side support frame and the positioning mechanism of the present invention; Figure 5 It is a cross-sectional schematic diagram of the hydraulic adjustment ring of the present invention; Figure 6 For the present invention Figure 5 A magnified schematic diagram of part A; Figure 7 It is a schematic diagram of the connection between the oil inlet valve, the pressure balance rod, the connecting paddle and the regulating valve block of the present invention; Figure 8 The figure is a schematic diagram of connecting the paddle and the offset switch of the present invention.

[0021] In the figure: 1, main frame; 2, lifting platform; 21, rotating plate; 3, mounting plate; 31, main support plate; 32, arc support plate; 33, fixed slide bar; 4. Support mechanism; 41. Center rod; 42. Side support frame; 421. Mounting rod; 43. Positioning mechanism; 44. Positioning ring; 45. Fixed arm rod; 46. External clamping block; 47. Internal positioning block; 48. Driving hydraulic rod; 49. Hydraulic adjustment ring; 410. Welded positioning rod; 411. Support sheet; 412. Main pump oiler; 491, oil inlet valve; 492, oil inlet pipe; 493, regulating valve block; 494, main oil chamber; 495, oil distribution chamber; 496, pressure measuring chamber; 497, pressure balance rod; 498, return spring; 499, connecting paddle; 4910, offset switch; 5. Welding mechanism; 51. welding machine; 52. telescopic rod; 53. supporting pulley; 54. welding head; 6. Support slide block; 61. Support rod; 62. Welding machine guide rail; 7. Oil pipeline. DETAILED DESCRIPTION

[0022] 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 are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0023] See also Figure 1 - Figure 4 A large-caliber stainless steel elbow welding flip device comprises a main frame 1, a lifting platform 2 is drivably connected to the front of the main frame 1, a mounting plate 3 is detachably provided on the outside of the lifting platform 2, a main support plate 3 is fixedly connected to the outside of the mounting plate 3, and a supporting mechanism 4 for fixing the elbow is provided on the outside of the main support plate 31; A welding mechanism 5 is provided above the supporting mechanism 4; The support mechanism 4 includes a central rod 41 and two side support frames 42. The outside of the side support frames 42 is fixedly connected with a mounting rod 421. Both ends of the central rod 41 are hinged with connectors. The side support frames 42 are detachably connected through the connectors of the mounting rods 421 and the central rod 41. The outside of the side support frames 42 is provided with a positioning mechanism 43, which 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, and a fixed arm 45 is fixedly connected to the outside of the positioning ring 44. The outside of the fixed arm 45 is provided with an outer clamping block 46 and an inner positioning block 47 for clamping the large elbow pipe opening; A driving hydraulic rod 48 for controlling the sliding of the inner positioning block 47 is arranged inside the fixed arm 45 , and a hydraulic adjustment ring 49 for controlling the hydraulic oil of the driving hydraulic rod 48 is fixedly connected to the inside of the positioning ring 44 .

[0024] During the welding process, the side support frame 42 and the center rod 41 are separated, and then the side support frame 42 and the center rod 41 are assembled inside the semi-finished elbow.

[0025] It should be noted that the mounting rod 421 includes a screw rod disposed inside, and during the connection process between the side support frame 42 and the center rod 41 , the screw rod and the end connector of the center rod 41 are threadedly connected.

[0026] refer to Figure 1 and Figure 2 In an optional embodiment, the outside of the lifting platform 2 is drivably connected to a rotating plate 21, and the mounting plate 3 is fixedly mounted on the outside of the rotating plate 21 by bolts.

[0027] It should be noted that a connecting slot and a buckle are provided between the mounting plate 3 and the rotating plate 21 . When the mounting plate 3 is connected to the rotating plate 21 , the slot and the buckle cooperate with each other and are then fixed by bolts.

[0028] When the elbow needs to be flipped, the lifting platform 2 is controlled to rise, and then the rotating plate 21 is driven to rotate to flip the elbow 180°, and then the lifting platform 2 is controlled to descend and return to the welding position to facilitate controlled elbow welding.

[0029] refer to Figure 3 In an optional embodiment, a symmetrical arc-shaped support plate 32 is fixedly connected to the outside of the main support plate 31, a fixed slide bar 33 is slidably connected to the top of the arc-shaped support plate 32, and side support frames 42 on both sides are fixedly connected to the outside of the fixed slide bar 33 by bolts. The fixed slide bars 33 on both sides are used to slide on the arc-shaped support plate 32 to adjust the angle of the side support frames 42 on both sides.

[0030] It should be noted that when assembling the side support frame 42, the side support frame 42 and the fixed slide bar 33 are connected by bolts, and the centers of the two arc-shaped support plates 32 coincide. When adjusting the 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 angle of the side support frame 42 adapts to the angle of the elbow, and the fixed elbow is supported by the fixed slide bar 33 and the arc-shaped support plate 32.

[0031] refer to Figure 4In an optional embodiment, the outer rotation connection of the outer clamping block 46 is provided with a clamping bolt, the clamping bolt is threadedly connected to the fixed arm 45, the inner positioning block 47 is fixedly connected to the driving end of the driving hydraulic rod 48, and the fixed arm 45 is provided with two groups, and the two groups of fixed arm 45 are symmetrically distributed on both sides of the positioning ring 44, and each group of fixed arm 45 is provided with at least three.

[0032] It should be noted that when fixing the elbow, the outer clamping block 46 is controlled to abut against the outer pipe edge of the elbow, and then the clamping bolts are controlled to perform preliminary positioning and fixing.

[0033] 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 45, so that the inner positioning block 47 fixes and clamps the elbow, and when the fixation of the elbow is completed, the positioning ring 44 is flush with the elbow pipe mouth, and when the positioning rings 44 on both sides of the elbow are clamped and fixed with the elbow pipe mouth, the fixation of the elbow and the mounting plate 3 is completed.

[0034] The fixed arm 45 and the inner positioning block 47 are symmetrical on both sides. When the fixed arm 45 fixes the elbow through the inner positioning block 47, the center of the positioning ring 44 and the center of the elbow pipe mouth are colinear. Therefore, when the positioning rings 44 on both sides complete the fixing of the elbow, the center lines of the side support frame 42 and the center rod 41 and the centers of the joints on both sides of the elbow are coplanar, thereby ensuring the stability of the position when the elbow is fixed, and then ensuring the stability of the routing of the welding mechanism 5 during the welding process, avoiding deviation or distortion of the welding routing, thereby effectively ensuring the welding quality.

[0035] refer to Figure 3 In an optional embodiment, the number of driving hydraulic rods 48 is the same as that of the fixed arm rod 45, and 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 a main oil pump 412 is arranged at one end of the oil inlet pipe 492 away from the hydraulic adjustment ring 49. The main oil pump 412 is fixedly connected to the center rod 41, and an oil delivery pipe 7 is arranged outside the main oil pump 412.

[0036] 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 , so as to ensure the stability of the inner positioning block 47 in positioning and clamping the elbow. Example

[0037] refer to Figure 3 , Figure 5-Figure 8On the basis of the first embodiment, an oil inlet valve 491 is further provided inside the hydraulic regulating ring 49, and an regulating valve block 493 is movably connected inside the oil inlet valve 491. An oil inlet pipe 492 is connected to a 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 separation cavity 495 is connected to the outside of the main oil cavity 494. The oil separation cavity 495 is connected to the driving hydraulic rod 48, and the hydraulic oil is pumped into the driving hydraulic rod 48 through the oil separation cavity 495.

[0038] When the control driving hydraulic rod 48 is started, the main oil pump 412 pumps oil into the oil inlet valve 491 through the oil inlet pipe 492, and the hydraulic oil flows into the main oil chambers 494 on both sides through the oil inlet valve 491, and then flows into the oil separation chamber 495 through the main oil chamber 494, and then enters the driving hydraulic rod 48 through the oil separation chamber 495, so that the driving hydraulic rod 48 works.

[0039] refer to Figure 6 In an optional embodiment, the opposite sides of the oil separation chambers 495 are externally connected to a pressure measuring chamber 496, a pressure balancing rod 497 is movably connected between the pressure measuring chambers 496 on both sides, a return spring 498 is arranged between the two sides of the pressure balancing rod 497 and the positioning ring 44, a connecting paddle 499 is movably connected to the middle part of the pressure balancing rod 497, the connecting paddle 499 is rotatably connected to the inside of the positioning ring 44, and the end of the connecting paddle 499 away from the pressure balancing rod 497 is movably connected to the regulating valve block 493.

[0040] When the hydraulic oil enters the oil separation chamber 495, the oil separation chamber 495 and the pressure measuring chamber 496 are connected, so the oil pressure inside the pressure measuring chamber 496 and the oil separation chamber 495 is the same. Therefore, when the pressure driving the hydraulic rod 48 to push the internal positioning block 47 is the same, the internal pressures of the pressure measuring chambers 496 on both sides are balanced, and the pressure balance rod 497 remains stable. The pressure balance rod 497 drives the regulating valve block 493 to be stable through the connecting paddle 499, so that the oil inlet valve 491 can balance the oil inlet to the main oil chambers 494 on both sides.

[0041] During the clamping process, when the inner positioning block 47 on one side 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 chamber 495 increases, thereby causing the pressure of the pressure measuring chambers 496 on both sides to be unbalanced, causing the internal pressure balance rod 497 to shift under the action of the hydraulic difference. The pressure balance rod 497 drives the regulating valve block 493 to shift to the side of the high-pressure oil distribution chamber 495 through the connecting paddle 499, thereby reducing or blocking the flow of hydraulic oil to the main oil chamber 494 on the high-pressure side. The low-pressure main oil chamber 494 side continues to replenish oil until the pressures of the main oil chambers 494 on both sides are balanced, and the regulating valve block 493 is reset to the center position of the oil inlet valve 491.

[0042] By adjusting the valve block 493 and the pressure balance rod 497, the force applied to the elbow by each inner positioning block 47 is balanced when the elbow is clamped, thereby ensuring the stability of the elbow clamping and the effect of fixing the elbow.

[0043] The outer clamp block 46 is used to determine the outer diameter of the elbow to ensure the centering clamping of the elbow. The outer clamp block 46 plays an auxiliary role in fixing the elbow, further improving the fixing effect during the elbow welding process.

[0044] refer to Figure 3 In an optional embodiment, the outside of the side support frame 42 is slidably connected to a support slider 6, the outside of the support slider 6 is hinged with a support rod 61, the top of the support rod 61 is hinged with a welding machine guide rail 62, the welding mechanism 5 includes a welding machine 51 that can be driven and 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, the outside of the side positioning ring 44 is fixedly connected to a welding positioning rod 410, the end of the welding positioning rod 410 is fixedly connected to a support plate 411, and the support plate 411 and the welding machine 51 are electrically connected.

[0045] Furthermore, a bias switch 4910 is provided inside the positioning ring 44 , the bias switch 4910 is movably connected to the connecting paddle 499 , and the bias switch 4910 is electrically connected to the welding machine 51 .

[0046] When the clamping installation is completed, the offset switch 4910 is started, and the offset switch 4910 is used to monitor the fixing state of the elbow during the welding process.

[0047] During the fixed clamping process, when the electric welded elbow is broken or misaligned, the fixed arm 45 is misaligned in the clamping of the elbow, and 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 in the internal pressure of the oil chambers 495 on both sides. The pressure balance rod 497 is offset under the action of the oil pressure difference, and the pressure balance rod 497 drives the regulating valve block 493 to offset through the connecting paddle 499, thereby triggering the offset switch 4910. The offset switch 4910 controls the welding mechanism 5 to stop working, thereby effectively avoiding the occurrence of miswelding of the elbow during welding, thereby ensuring the quality of elbow welding.

[0048] During welding, the welding machine 51 moves above the elbow unsealing 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 on the outside of 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, thereby ensuring the stability of the welding process of the welding machine 51, reducing the trouble of manually controlling the direction of the welding machine 51, and improving the welding quality.

[0049] When welding the seam on the other side of the elbow, separate the support rod 61 and the support slider 6, then control the lifting platform 2 and the rotating plate 21 to control the elbow to flip, then connect and separate the support rod 61 and the support slider 6, and re-place the welding machine 51 above the elbow seam to perform the welding operation on the other side of the elbow seam. Example

[0050] A large-caliber stainless steel elbow welding flipping method, the steps of which include: S1. Select two semi-finished elbows, and spot weld the two elbows together to complete the semi-finished elbow material preparation; S2, separate the mounting plate 3 and the lifting platform 2, and connect the elbow semi-finished product 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 elbow semi-finished product are in a vertical state, and then fix the position of the elbow semi-finished product and the mounting plate 3 by adjusting the outer clamping block 46 and the inner positioning block 47, and complete the assembly of the elbow semi-finished product; S3, start the external lifting 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 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 the seam on one side of the semi-finished elbow, the welding mechanism 5 and the elbow are separated, the lifting platform 2 and the mounting plate 3 are controlled, the mounting plate 3 is adjusted to rotate 180°, and after the flipping adjustment of the elbow is completed, the welding mechanism 5 is reinstalled on the top of the elbow to start the welding operation of the weld on the other side.

[0051] Preferably, the angle between the side support frame 42 and the center rod 41 is adjusted to match the angle of the elbow, and after the outer clamping block 46 and the inner positioning block 47 are fixed to the elbow pipe mouth, the positioning ring 44 is parallel to the elbow pipe mouth.

[0052] By fixing and supporting the elbow through the positioning mechanism 43, compared with the traditional method of fixing and installing by welding, the disassembly and assembly of the elbow can be completed more conveniently, and it is convenient to improve the optionality and adjustability of the elbow installation and fixation, and it is convenient to recycle the positioning mechanism 43, thereby improving the use effect of the welding flipping device.

[0053] The elbow is fixed by the side support frame 42 and the positioning mechanism 43, and the center of the side support frame 42 is controlled to be coplanar with the center of the elbow joint, so that the routing of the welding machine 51 can be controlled by the side support frame 42, thereby further improving the stability of the routing of the welding machine 51 and ensuring the quality of welding.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large-caliber stainless steel elbow welding flipping device, comprising a main frame (1), the front of the main frame (1) being drivably slidably connected to a lifting platform (2), the outside of the lifting platform (2) being detachably provided with a mounting plate (3), characterized in that: The outside of the mounting plate (3) is fixedly connected to a main support plate (31), and the outside of the main support plate (31) is provided with a support mechanism (4) for fixing the elbow; A welding mechanism (5) is provided above the support mechanism (4); The support mechanism (4) comprises a central rod (41) and two side support frames (42); the outside of the side support frames (42) is fixedly connected to a mounting rod (421); both ends of the central rod (41) are hinged with connectors; the side support frames (42) are detachably connected via the connectors of the mounting rod (421) and the central rod (41); and the outside of the side support frames (42) is provided with a positioning mechanism (43); the positioning mechanism (43) is used for centering and clamping the elbow; The positioning mechanism (43) comprises 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 to a fixed arm (45); the outside of the fixed arm (45) is provided with an outer clamping block (46) for clamping the large elbow pipe opening and an inner positioning block (47); A driving hydraulic rod (48) for controlling the sliding of the inner positioning block (47) is arranged inside the fixed arm (45), and a hydraulic adjustment ring (49) for controlling the hydraulic oil of the driving hydraulic rod (48) is fixedly connected inside the positioning ring (44).

2. A large-caliber stainless steel elbow welding flipping device according to claim 1, characterized in that: The outside of the lifting platform (2) is drivably rotatably connected to a rotating plate (21), and the mounting plate (3) is fixedly mounted on the outside of the rotating plate (21) by means of bolts.

3. A large-caliber stainless steel elbow welding flipping device according to claim 1, characterized in that: A symmetrical arc-shaped support plate (32) is fixedly connected to the outside of the main support plate (31), a fixed slide bar (33) is slidably connected to the top of the arc-shaped support plate (32), and the side support frames (42) on both sides are fixedly connected to the outside of the fixed slide bar (33) by bolts, and the fixed slide bars (33) on both sides are used to slide on the arc-shaped support plate (32) to adjust the angle of the side support frames (42) on both sides.

4. A large-caliber stainless steel elbow welding flipping device according to claim 1, characterized in that: The outer portion of the outer clamping block (46) is rotatably connected to a clamping bolt, which is threadedly connected to a fixed arm rod (45). The inner positioning block (47) is fixedly connected to a driving end of a driving hydraulic rod (48). Two groups of fixed arm rods (45) are provided. 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) is provided with at least three.

5. A large-caliber stainless steel elbow welding flipping device according to claim 4, characterized in that: The number of the driving hydraulic rods (48) is the same as that of 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); a main oil pump (412) is arranged at one end of the oil inlet pipe (492) away from the hydraulic adjustment ring (49); the main oil pump (412) is fixedly connected to the center rod (41); and an oil delivery pipe (7) is arranged outside the main oil pump (412).

6. A large-caliber stainless steel elbow welding flipping device according to claim 5, characterized in that: An oil inlet valve (491) is arranged inside the hydraulic regulating ring (49), and an regulating valve block (493) is movably connected inside the oil inlet valve (491). The oil inlet pipe (492) is connected to a 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 separation cavity (495) is connected to the outside of the main oil cavity (494), and the oil separation cavity (495) is connected to a driving hydraulic rod (48). Hydraulic oil is pumped into the driving hydraulic rod (48) through the oil separation cavity (495).

7. A large-caliber stainless steel elbow welding flipping device according to claim 6, characterized in that: The oil separation chambers (495) on both sides are externally connected to pressure measuring chambers (496) on opposite sides, and a pressure balancing rod (497) is movably connected between the pressure measuring chambers (496) on both sides. A return spring (498) is provided between the two sides of the pressure balancing rod (497) and the positioning ring (44). A connecting paddle (499) is movably connected to the middle of the pressure balancing rod (497). The connecting paddle (499) is rotatably connected to the inside of the positioning ring (44), and one end of the connecting paddle (499) away from the pressure balancing rod (497) is movably connected to the regulating valve block (493).

8. A large-caliber stainless steel elbow welding flipping device according to claim 7, characterized in that: The outside of the side support frame (42) is slidably connected to a support slider (6), the outside of the support slider (6) is hinged to a support rod (61), the top of the support rod (61) is hinged to a welding machine guide rail (62), the welding mechanism (5) comprises a welding machine (51) that can be driven and 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), the outside of the side positioning ring (44) is fixedly connected to a welding positioning rod (410), the end of the welding positioning rod (410) is fixedly connected to a support sheet (411), and the support sheet (411) and the welding machine (51) are electrically connected.

9. A large-caliber stainless steel elbow welding flipping device according to claim 8, characterized in that: A bias switch (4910) is provided inside the positioning ring (44); the bias switch (4910) is movably connected to the connecting paddle (499); and the bias switch (4910) is electrically connected to the welding machine (51).

10. A method for welding and flipping a large-diameter stainless steel elbow, according to a device for welding and flipping a large-diameter stainless steel elbow according to any one of claims 1 to 9, characterized in that: The steps include: S1. Select two semi-finished elbows, and spot weld the two elbows together to complete the semi-finished elbow material preparation; S2, separating the mounting plate (3) and the lifting platform (2), and connecting the elbow semi-finished product to the mounting plate (3) by means of an outer clamping block (46) and an inner positioning block (47), adjusting the position of the elbow so that the seams on both sides of the elbow semi-finished product are in a vertical state, and then fixing the position of the elbow semi-finished product and the mounting plate (3) by adjusting the outer clamping block (46) and the inner positioning block (47), thereby completing the assembly of the elbow semi-finished product; S3, start the external lifting 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) 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 the seam on one side of the semi-finished elbow, the welding mechanism (5) and the elbow are separated, the lifting platform (2) and the mounting plate (3) are controlled, and the mounting plate (3) is adjusted to rotate 180°. After the elbow is turned over and adjusted, the welding mechanism (5) is reinstalled above the elbow to start the welding operation of the weld on the other side.

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