A super-long pipe flange elbow welding device and processing technology

Abstract

The present invention discloses an ultra-long pipe flange bend welding device, comprising a base, a fixed flange seat and a rotating flange seat are relatively slidably arranged on the base, and the fixed flange seat and the rotating flange seat are correspondingly mounted with a fixed flange and a rotating flange facing each other; and a rotating motor for driving the rotating flange to rotate is mounted on the rotating flange seat. The ultra-long pipe flange bend welding device does not require additional manual cooperation, reduces the workload of workers, improves welding efficiency, and ensures welding accuracy and welding quality. In addition, it is convenient to phosphate and clean the oil pipe in a straight pipe state, and prevents residual liquid in the oil pipe from causing rust. The present invention also discloses an ultra-long pipe flange first welding and then bending processing technology.

Description

Technical Field

[0001] The invention relates to the technical field of oil pipe processing, and in particular to an ultra-long pipe flange elbow welding device and a processing technology. Background Art

[0002] Extra-long oil pipes are an indispensable and important auxiliary component in the hydraulic transmission system. Their performance is closely related to whether the entire hydraulic system can operate normally and efficiently. With the technological improvement of main manufacturers in the construction machinery industry, the overall length of oil pipes continues to increase, causing great obstacles to the production and manufacturing of oil pipes.

[0003] At present, the conventional processing technology for super-long oil pipes is cutting-bending-vertical welding-phosphating. However, due to many characteristics of oil pipes (long length, many bends, irregular shape, and heavy pipe weight), the product needs to be moved by crane during welding, and assisted by manual cooperation. On the one hand, it increases the labor intensity of workers, and on the other hand, it reduces the welding efficiency. In addition, after the oil pipe is bent, the welding stability of its end flange is poor, and there are hidden dangers in welding quality. In addition, after welding, the oil pipe is not conducive to placement, and the frame installation efficiency is low. Due to the accumulation of liquid inside the bend of the oil pipe, the bend is prone to rust, affecting the internal cleanliness. Therefore, it is necessary to improve the existing oil pipe welding device and processing technology. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is: in order to overcome the shortcomings of the prior art, an extra-long pipe flange elbow welding device and processing technology are provided which can reduce the workload of workers, improve welding efficiency and accuracy and facilitate cleaning.

[0005] In order to solve the above technical problems, the present invention provides an extra-long pipe flange elbow welding device: it includes a base, on which a fixed flange seat and a rotating flange seat are relatively slidable, and the fixed flange seat and the rotating flange seat are correspondingly installed with facing fixed flanges and rotating flanges; the rotating flange seat is installed with a rotating motor for driving the rotating flange to rotate.

[0006] When the welding device of the above technical solution is used, the fixed flange and the rotating flange are respectively installed on the fixed flange seat and the rotating flange seat, and then one end of the oil pipe in the straight pipe state is welded and fixed to the fixed flange, the rotating motor is started, the angle of the rotating flange is adjusted, and then the distance between the fixed flange seat and the rotating flange seat is adjusted so that the rotating flange on the rotating flange seat is sleeved on the unwelded end of the oil pipe, and then the oil pipe and the rotating flange are welded and fixed. Since the oil pipe is welded in the straight pipe state, it is not only convenient to operate, but also conducive to improving welding efficiency and welding accuracy, the welding quality is more stable, the welding forming state is good, and the problems of welding clamping difficulties caused by the rotation center of gravity of the vertical welding workpiece after bending, and the assembly welding is not in the same axis, and no additional manual assistance is required, reducing the workload of workers; after welding is completed, the oil pipe is still in a straight pipe state, so it is conducive to the post-processing processes such as pickling and phosphating of the product, and there is no accumulation of liquid after cleaning the pipe, which prevents the oil pipe from rusting.

[0007] Preferably, a turntable is rotatably provided on the surface of the rotating flange seat, and the rotating motor is drivingly connected to the turntable; a rotating flange positioning column is installed on the surface of the turntable, and the rotating flange positioning column cooperates with the rotating flange for positioning.

[0008] By adopting the above technical solution, the rotating flange is conveniently fixed on the turntable by using the rotating flange positioning column, and the turntable is driven by the rotating motor to rotate, thereby adjusting the angle of the rotating flange.

[0009] Preferably, the turntable is provided with two rotation grooves, and the rotation grooves are slidably matched with rotation sliders; the rotation flange positioning columns are provided with two and are fixedly connected with the rotation sliders in a one-to-one correspondence.

[0010] By adopting the above technical solution, two rotating sliders are used to slide in the two rotating grooves, thereby driving the rotating flange positioning column to move. The distance between the two rotating flange positioning columns is adjusted according to the model of the rotating flange, so that the bolt holes of the rotating flange can be sleeved on the two rotating flange positioning columns, thereby completing the fixation of the rotating flange.

[0011] Preferably, two electric push rods are connected to the outer edge of the turntable, and the electric push rods correspond one-to-one to the rotating slider; the electric push rods include a driving motor, a screw and a moving block, the driving motor is fixedly connected to the turntable and is drivingly connected to the screw, the moving block is threadedly matched with the screw and is fixedly connected to the rotating slider through a sliding rod.

[0012] By adopting the above technical solution, when adjusting the distance position of the rotating flange positioning column, the electric push rod is started, the drive motor runs, and the lead screw is driven to rotate. The lead screw drives the moving block to move along the axis of the lead screw through the threaded cooperation, and then drives the rotating slider to slide in the rotating groove through the sliding rod, thereby driving the rotating flange positioning column to move.

[0013] Preferably, the rotation groove is a T-shaped groove.

[0014] The adoption of the above technical solution is conducive to achieving stable rotation of the rotating slider in the rotating groove and preventing the rotating slider from being separated from the rotating groove.

[0015] Preferably, the fixed flange seat comprises a chassis and a fixed plate connected to each other; a fixed flange positioning column is installed on the surface of the fixed plate, and the fixed flange positioning column cooperates with the fixed flange for positioning; the chassis is slidably matched with the base.

[0016] By adopting the above technical solution, the bolt holes of the fixed flange are sleeved on the fixed flange positioning columns to realize the installation of the fixed flange on the fixed plate. The chassis slides on the base to facilitate the adjustment of the distance between the fixed flange and the rotating flange according to the length of the oil pipe, thereby facilitating the assembly and welding of the oil pipe and the rotating flange.

[0017] Preferably, two fixing grooves are provided on the fixing plate, the fixing grooves penetrate through the side surfaces of the fixing plate, the fixing grooves are slidably matched with fixing sliders, and the fixing sliders are fixedly connected to the fixing flange positioning columns.

[0018] By adopting the above technical solution, the fixing slider is slid in the fixing groove to change the position of the fixing flange positioning column, thereby adjusting the distance between the two fixing flange positioning columns according to the flange model, so that the bolt holes of the fixing flange can be fitted on the two fixing flange positioning columns when the fixing flange is installed.

[0019] Preferably, the fixing groove is a T-shaped groove.

[0020] By adopting the above technical solution, the fixing slider is prevented from being separated from the fixing groove, thereby achieving stable sliding of the fixing slider in the fixing groove.

[0021] Preferably, guide grooves are arranged opposite to each other on both sides of the chassis, and the two guide grooves are respectively slidably matched with the two sides of the base.

[0022] By adopting the above technical solution, the position of the fixed flange seat is changed by utilizing the sliding cooperation between the guide groove and the side of the base, so as to adjust the distance between the fixed flange seat and the rotating flange seat according to the length of the oil pipe.

[0023] Preferably, two convex strips are arranged side by side on the chassis, the extension direction of the convex strips is consistent with the extension direction of the guide groove, the cross-section of the convex strips is L-shaped, the two convex strips are arranged opposite to or back to back, and two recesses are arranged on the fixed plate, and the recesses are adapted to the convex strips.

[0024] By adopting the above technical solution, the fixing plate can slide on the chassis by utilizing the matching relationship between the notch on the fixing plate and the convex strip on the chassis, and then the position of the fixing plate can be accurately adjusted according to the length of the oil pipe, so as to accurately control the distance between the fixing flange and the rotating flange on the fixing plate.

[0025] Preferably, it further comprises a translation assembly, and the translation assembly is drivingly connected to the chassis.

[0026] By adopting the above technical solution, the translation assembly is used to drive the movement of the fixed flange seat, so that the distance adjustment between the fixed flange and the rotating flange is more convenient.

[0027] Preferably, the base is horizontally arranged, and the rotating flange seat is arranged above the base; the translation assembly includes a rotating motor, a driving gear, a driven gear, a chain and a guide gear; the rotating motor is fixed to one end of the base, and the output end of the rotating motor is drivingly connected to the driving gear; the chain is in the shape of a crawler; the driven gear and the driving gear are respectively located at the inner ends of the chain, and the guide gear is rotatably arranged below the base and connected to the chain; the upper and lower layers of the chain are respectively located above and below the base, the fixed flange seat is connected to the upper layer of the chain, and the guide gear is connected to the lower layer of the chain.

[0028] By adopting the above technical solution, when adjusting the distance between the fixed flange seat and the rotating flange seat, the rotating motor is started to drive the driving gear to rotate, acting on the crawler-shaped chain, so that the chain rotates under the action of the driven gear and the guide gear, driving the chassis above the base to move, thereby changing the distance between the fixed flange on the fixed flange seat and the rotating flange on the rotating flange seat.

[0029] Preferably, at least two oil pipe support members are further provided on the base, and the oil pipe support members are arranged along the relative sliding direction of the two fixed flange seats.

[0030] By adopting the above technical solution, the oil pipe support is used to support the area between the two ends of the extra-long oil pipe, so that the oil pipe maintains a horizontal angle, which facilitates welding of the oil pipe with the fixed flange and the rotating flange at both ends.

[0031] Preferably, a strip sliding opening is provided on the base, and the extension direction of the strip sliding opening is consistent with the distribution direction of the oil pipe support; the oil pipe support includes a sliding shaft that slides with the strip opening and a supporting boss fixed above the sliding shaft, and the two sides of the top of the supporting boss are fixedly connected to a limiting rod, and the axial direction of the limiting rod is consistent with the axial direction of the sliding shaft.

[0032] By adopting the above technical solution, when the oil pipe support is used to support the horizontally placed oil pipe, the oil pipe is placed on the top of the supporting boss, and two limit rods are used to prevent the oil pipe from detaching from the supporting boss. The bottom of the supporting boss slides in the strip-shaped sliding mouth through the sliding shaft, which makes it convenient to adjust the supporting position of the oil pipe support according to the length of the oil pipe.

[0033] In order to solve the above technical problems, the present invention also provides a process for welding and then bending an ultra-long pipe flange, comprising the following steps:

[0034] Step 1: unloading, transporting the straight oil pipe to the processing site;

[0035] Step 2: Horizontal welding: adjust the oil pipe to a horizontal angle and then perform welding. Specifically:

[0036] Step 2.1: Fixing: welding one end of the oil pipe to the fixed flange at a fixed position;

[0037] Step 2.2: Adjustment, by rotating the motor to adjust the turntable to a predetermined angle; by adjusting the two rotating sliders to the sliding positions of the two rotating grooves through two electric push rods, at this time, the two rotating flange positioning columns are adjusted to the predetermined positions; the rotating flange is matched with the two rotating flange positioning columns for positioning and connection;

[0038] Step 2.3: Assemble, drive the fixed flange seat to move by the rotating motor, and the unwelded end of the oil pipe is in contact with the rotating flange under the drive of the fixed flange seat;

[0039] Step 2.4: Spot weld and fix the unwelded end to the rotating flange by electric welding;

[0040] Step 2.5: Welding: Use a welding machine to weld the outer edge of the unwelded end to the outer edge of the rotating flange;

[0041] Step 3, bending the pipe, bending the straight oil pipe by cold bending or hot pushing.

[0042] In the processing technology of the above technical solution, when the oil pipe is in a straight pipe state, the position of the fixed flange is first fixed, and then one end of the oil pipe is welded to the fixed flange, and then the angle of the rotating flange is adjusted, and then the distance between the fixed flange and the rotating flange is adjusted, and after the rotating flange and the other end of the oil pipe are assembled, the oil pipe and the rotating flange are fixedly welded. Since the oil pipe is welded in a straight pipe state, it not only improves the welding efficiency and welding accuracy, ensures the welding quality, but also does not require additional manual cooperation, reduces the workload of workers, and the oil pipe welded in the straight pipe state is convenient for pickling and phosphating, avoiding corrosion of the oil pipe.

[0043] Preferably, between step 2.5 and step 3, the following steps are also included:

[0044] Step 2.6, phosphating, forms a phosphating film on the surface of the oil pipe through chemical and electrochemical reactions.

[0045] By adopting the above technical solution, the phosphating treatment of the oil pipe is achieved, and a phosphating mold is formed on the oil pipe, which plays a role in protecting the oil pipe and enhancing the corrosion resistance of the oil pipe.

[0046] In summary, compared with the prior art, the ultra-long pipe flange elbow welding device and processing technology of the present invention have the following beneficial effects:

[0047] 1. The oil pipe is spliced ​​and welded in a straight state, which is convenient to operate and greatly improves the processing efficiency;

[0048] 2. The flange is pre-adjusted before welding, which improves the welding accuracy, ensures the welding quality, and ensures a good weld formation. It completely solves the problems of welding clamping difficulties and different axes of assembly and welding caused by the change of the center of gravity of the vertical welding workpiece after bending the pipe;

[0049] 3. No additional manual assistance is required, thus reducing the workload of workers;

[0050] 4. The pickling and phosphating of the oil pipe in the straight pipe state are more efficient and of better quality. There is no liquid accumulation in the pipe, which prevents the oil pipe from rusting;

[0051] 5. The extra-long pipe flange is welded first and then bent, so the product positioning accuracy is higher and the size is more precise and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a state diagram of the prior art in which a pipe is first bent and then welded;

[0053] Figure 2 It is a schematic diagram of the structure of the present invention;

[0054] Figure 3 It is a schematic diagram of the structure of the present invention;

[0055] Figure 4 yes Figure 3 A magnified view of part A;

[0056] Figure 5 yes Figure 3 A magnified view of part B;

[0057] Figure 6 yes Figure 3 Enlarged view of part C;

[0058] Figure 7 It is a schematic diagram of the assembly of the flange fixing seat and the fixing flange of the present invention;

[0059] Figure 8 yes Figure 7 A magnified view of the D portion;

[0060] Fig. 9 It is a schematic diagram of the assembly of the flange adjusting member, the rotating assembly and the flange of the present invention;

[0061] Fig.10 It is a structural schematic diagram of the turntable of the present invention;

[0062] Fig.11 yes Fig.10 A magnified view of part E;

[0063] Fig.12 It is a schematic diagram of the assembly of the electric push rod of the present invention;

[0064] Fig.13 It is a structural schematic diagram of the oil pipe support member of the present invention;

[0065] Fig.14 It is a process flow chart of the present invention;

[0066] Fig.15 It is a process flow chart of the horizontal welding process of the present invention;

[0067] In the figure: 1. base, 2. fixed flange seat, 21. chassis, 21-1. guide groove, 21-2. convex strip, 22. fixed plate, 22-1. fixed groove, 22-2. notch, 23. fixed flange positioning column, 24. fixed slider, 3. rotating flange seat, 31. rotating motor, 32. turntable, 32-1. rotating groove, 33. rotating slider, 34. rotating flange positioning column, 35. electric push rod, 351. driving motor, 352. lead screw, 353. moving block, 354. slide rod, 4. translation assembly, 41. rotating motor, 42. driving gear, 43. driven gear, 44. chain, 45. guide gear, 5. oil pipe support, 51. sliding shaft, 52. supporting convex column, 53. limit rod, 6. fixed flange, 7. rotating flange, 8. oil pipe, 9. clamp. DETAILED DESCRIPTION

[0068] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0069] like Figure 1As shown, in the prior art, when welding the extra-long oil pipe 8, the oil pipe 8 is first bent relative to the oil pipe 8 to be bent into an irregular shape with multiple bends. After a flange is welded at one end of the oil pipe 8, the oil pipe 8 is lifted and transported by a crane (not shown in the figure), with the end of the oil pipe 8 not welded with the flange facing downward, the angular position of the oil pipe 8 is adjusted, and the angular position of the oil pipe 8 is clamped and fixed by various clamps 9 to prevent the oil pipe 8 from shaking and deviating during welding, which affects the welding accuracy. Then, the height and angular position of the flange below the oil pipe 8 are adjusted by calculation, and the flange and the unwelded end of the oil pipe 8 are fixedly welded. Since the oil pipe 8 is long and has many bends, it is processed by bending the pipe first and then welding. When adjusting the angle and position of the oil pipe 8, it takes up a lot of working space and is extremely inconvenient to operate. In addition, the oil pipe 8 is heavy and needs to be handled by a crane or other transport equipment. In addition, the fixed position of the clamp 9 needs to be controlled according to the shape of the oil pipe 8, so additional manual assistance is required, which increases the workload of the workers and reduces the welding efficiency of the oil pipe 8. In addition, the oil pipe 8 has many bends, and when welding the flange at the other end, the welding accuracy is low, making it difficult to ensure the processing quality.

[0070] like Figure 2 and Figure 3 As shown, an ultra-long pipe flange bend welding device of the present invention includes a base 1, a translation component 4 and a rotation component 5. The base 1 is horizontally arranged, and a flange fixing part 2 and a flange rotating part 3 are arranged above the base 1. The translation component 4 is connected to the flange fixing part 2, and the rotation component 5 is connected to the flange rotating part 3. Three oil pipe support members 5 are also arranged on the base 1, and the three oil pipe support members 5 are distributed along the long side direction of the base 1.

[0071] It includes a horizontally arranged base 1, to which a fixed flange seat 2 and a rotating flange seat 3 are connected, and the fixed flange seat 2 and the rotating flange seat 3 are correspondingly installed with a fixed flange 6 and a rotating flange 7; the rotating flange seat 3 is fixed on the base 1 and is installed with a rotating motor 31 for driving the rotating flange 7 to rotate; the base 1 is also connected to a translation component 4, which drives the fixed flange seat 2 to move.

[0072] When the welding device is in use, the fixed flange 6 is installed on the fixed flange seat 2, the rotating flange 7 is installed on the rotating flange seat 3, and the rotating motor 31 is started to drive the rotating flange 7 to rotate and adjust its angular position; then the oil pipe 8 in a straight pipe state is placed horizontally on the oil pipe support 6, and one end of the oil pipe 8 is assembled and welded to the fixed flange 6, the translation component 4 is started to drive the fixed flange seat 2 to move, and the distance between the fixed flange 6 and the rotating flange 7 is adjusted to match the oil pipe 8, and then the rotating flange 7 and the oil pipe 8 are assembled and welded. Since the oil pipe 8 is welded in a straight pipe state, the operation is convenient and no additional manual cooperation is required, which reduces the workload of workers. In addition, the angle of a rotating flange 7 is adjusted in advance by rotating the motor 31 before welding, thereby ensuring the welding quality and welding accuracy. After the welding is completed, the oil pipe 8 is removed. When other oil pipes 8 are assembled, since the turntable 32 has been pre-adjusted in angle by the rotating motor 31, there is no need to adjust the angle position of the rotating flange 7 at the end of the next oil pipe 8 when welding. Workers can directly fix the rotating flange 7 on the turntable 32, which reduces the workload of workers and helps to improve welding efficiency. In addition, the welded oil pipe 8 is still in a straight pipe state, which is convenient for pickling and phosphating treatment, and there will be no residual liquid in the oil pipe 8 to cause internal corrosion of the oil pipe 8.

[0073] It should be noted that, in this embodiment, the translation assembly 4 may also be omitted, and it is only necessary to ensure that the fixed flange seat 2 and the rotating flange seat 3 can slide relative to each other so that the distance between the two can be adjusted according to the length of the oil pipe 8; the translation assembly 4 may also drive the rotating flange seat 3 to move, or control the moving speeds of the fixed flange seat 2 and the rotating flange seat 3 to be different so as to be able to adjust the distance between the fixed flange 6 and the rotating flange 7.

[0074] like Figure 5 , Figure 7 and Figure 8 As shown, the fixed flange seat 2 includes a chassis 21 and a fixed plate 22 connected to each other; a fixed flange positioning column 23 is installed on the surface of the fixed plate 22, and the fixed flange positioning column 23 cooperates with the fixed flange 6 for positioning; two fixed grooves 22-1 are provided on the fixed plate 22, and the fixed groove 22-1 runs through the side of the fixed plate 22, and the fixed groove 22-1 is slidably matched with a fixing slider 24, and the fixing slider 24 is fixedly connected to the fixed flange positioning column 23; the fixing groove 22-1 is a T-shaped groove; guide grooves 21-1 are arranged on both sides of the chassis 21, and the two guide grooves 21-1 are respectively slidably matched with the two sides of the base 1; two convex strips 21-2 are arranged side by side on the chassis 21, and the extension direction of the convex strip 21-2 is consistent with the extension direction of the guide groove 21-1, and the cross-section of the convex strip 21-2 is L-shaped, and the two convex strips 21-2 are arranged opposite to each other, and two notches 22-2 are arranged on the fixed plate 22, and the notches 22-2 are adapted to the convex strip 21-2.

[0075] In the fixed flange seat 2, the fixing slider 24 can slide in the fixing groove 22-1 of the fixing plate 22, so as to adjust the position and distance of the two fixing flange positioning columns 23 according to the model of the fixing flange 6. When installing the fixing flange 6, two of the bolt holes of the fixing flange 6 are sleeved on the fixing flange positioning columns 23, so as to fix the position of the fixing flange 6. The fixing groove 22-1 is a T-shaped groove, which can prevent the fixing slider 24 from being separated from the fixing groove 22-1, and ensure the stable sliding of the fixing slider 24, so as to achieve a stable installation connection between the fixing flange 6 and the fixing flange seat 2. The guide grooves 21-1 on both sides of the chassis 21 are slidably matched with the two sides of the base 1, so as to achieve the stable sliding of the chassis 21 on the base 1 and adjust the distance between the fixing flange 6 and the rotating flange 7; in addition, due to the matching between the notch 22-2 and the convex strip 21-2, the fixing plate 22 can slide on the chassis 21, and the position of the fixing plate 22 can be accurately controlled, so as to facilitate the fine adjustment of the position of the fixing flange 7 on the fixing plate 22 to meet the assembly and welding requirements of the oil pipe 8.

[0076] like Fig. 9 , Fig.10 and Fig.11 As shown, a rotating disk 32 is rotatably arranged on the surface of the rotating flange seat 3, and a rotating motor 31 is drivingly connected to the rotating disk 32; a rotating flange positioning column 34 is installed on the surface of the rotating disk 32, and the rotating flange positioning column 34 cooperates with the rotating flange 7 for positioning; two rotating grooves 32-1 are provided on the rotating disk 32, and a rotating slider 33 is slidably matched with the rotating groove 32-1; there are two rotating flange positioning columns 34 and they are fixedly connected with the rotating slider 33 in a one-to-one correspondence; two electric push rods 35 are connected to the outer edge of the rotating disk 32, and the electric push rods 35 correspond to the rotating slider 33 in a one-to-one correspondence; as shown in FIG. Fig.12 As shown, the electric push rod 35 includes a driving motor 351, a screw rod 352 and a moving block 353. The driving motor 351 is fixedly connected to the turntable 32 and is drivingly connected to the screw rod 352. The moving block 353 is threadedly matched with the screw rod 352 and is fixedly connected to the rotating slider 33 through a slide rod 354. The rotating groove 32-1 is a T-shaped groove.

[0077] According to the size of the rotating flange 7, the electric push rod 35 is started, the driving motor 351 drives the screw rod 352 to rotate, and the screw rod 352 drives the moving block 353 to move along the axis of the screw rod 352 through threaded engagement, thereby driving the rotating slider 33 fixedly connected thereto to slide in the rotating groove 32-1 of the turntable 32, thereby driving the two rotating flange positioning columns 34 to move, so that the two bolt holes of the rotating flange 7 can be respectively sleeved on the two rotating flange positioning columns 34, and the installation of the rotating flange 7 on the turntable 32 is completed; the rotating groove 32-1 is a T-shaped groove, which can prevent the rotating slider 33 from escaping from the rotating groove 32-1, thereby ensuring the stable sliding of the rotating slider 33, and realizing the stable installation connection between the rotating flange 7 and the turntable 32. When adjusting the angle of the rotating flange 7, the rotating motor 31 is started, driving the turntable 32 to rotate, thereby driving the rotating flange positioning columns 34 and the rotating flange 7 to rotate, and adjusting the angle of the rotating flange 7.

[0078] like Figure 4 , Figure 5 and Figure 6 As shown, the translation assembly 4 includes a rotating motor 41, a driving gear 42, a driven gear 43, a chain 44 and a guide gear 45; the rotating motor 41 is fixed to one end of the base 1, and the output end of the rotating motor 41 is drivingly connected to the driving gear 42; the chain 44 is in the shape of a crawler; the driven gear 43 and the driving gear 42 are respectively located at the inner ends of the chain 44, and the guide gear 45 is rotatably arranged below the base 1 and connected to the chain 44; the upper and lower layers of the chain 44 are respectively located above and below the base 1, the fixed flange seat 2 is connected to the upper layer of the chain 44, and the guide gear 45 is connected to the lower layer of the chain 44.

[0079] When it is necessary to adjust the distance between the fixed flange 6 and the rotating flange 7, the rotating motor 41 in the translation assembly 4 is started, driving the driving gear 42 to rotate, acting on the inner side of the track-shaped chain 44, so that the chain 44 rotates under the support of the driven gear 43 and the guidance of the guide gear 45, and the upper layer of the chain 44 moves, thereby driving the chassis 21 on the fixed flange seat 2 to slide on the base 1, thereby adjusting the distance between the fixed flange seat 2 and the rotating flange seat 3.

[0080] like Figure 4 and Fig.14 As shown, three strip-shaped sliding openings 1-1 are provided on the base 1, and the extension direction of the strip-shaped sliding openings 1-1 is consistent with the distribution direction of the oil pipe support 5, and the three strip-shaped sliding openings 1-1 correspond to the three oil pipe support members 5 one by one; the oil pipe support member 5 includes a sliding shaft 51 slidably matched with the strip-shaped opening and a supporting boss 52 fixed above the sliding shaft 51, and the two sides of the top of the supporting boss 52 are fixedly connected with a limiting rod 53, and the axial direction of the limiting rod 53 is consistent with the axial direction of the sliding shaft 51.

[0081] In the oil pipe support 5, the top of the supporting boss 52 is used to support the placed oil pipe 8, and the limit rods 53 on both sides of the top of the supporting boss 52 place the oil pipe 8 away from the supporting boss 52. Below the supporting boss 52, the sliding shaft 51 can slide along the strip sliding mouth 1-1, so as to facilitate the adjustment of the position of the oil pipe support 5 according to the length of the oil pipe 8 to achieve stable support for the oil pipe 8.

[0082] like Fig.14 As shown, a process for processing an ultra-long pipe flange by first welding and then bending the pipe of the present invention comprises the following steps:

[0083] Step 1: unloading, transporting the straight oil pipe 8 to the processing site;

[0084] Step 2, horizontal welding, welding the oil pipe 8 in a horizontal state;

[0085] Step 3, bending the pipe, bending the straight oil pipe 8 by cold bending or hot pushing.

[0086] In this processing technology, since the oil pipe 8 is welded in a straight pipe state, it is not only easy to operate, but also beneficial to improve processing efficiency and reduce workers' workload. At the same time, the welding position accuracy of the flange during welding is guaranteed, thereby improving the welding quality. In addition, phosphating and cleaning treatments are carried out before bending the pipe to avoid residual liquid in the oil pipe and cause rust on the oil pipe.

[0087] like Fig.15 As shown in the figure, the specific process flow of horizontal welding is as follows:

[0088] Step 2.1: Fixing, welding one end of the oil pipe to the fixed flange 6 at a fixed position;

[0089] Step 2.2: Adjustment, by rotating the motor 31, the turntable 32 is adjusted to a predetermined angle; by adjusting the two rotating sliders 33 to slide in the two rotating grooves 32-1 through the two electric push rods 35, at which time the two rotating flange positioning columns 34 are adjusted to the predetermined positions; the rotating flange 7 is matched and positioned with the two rotating flange positioning columns 34;

[0090] Step 2.3: Assembling, the fixed flange seat 2 is driven to move by the rotating motor 41, and the unwelded end of the oil pipe is in contact with the rotating flange 7 under the drive of the fixed flange seat 2;

[0091] Step 2.4: Spot welding for positioning, and fix the unwelded end to the rotating flange 7 by electric welding;

[0092] Step 2.5: Welding: Use a welding machine to weld the outer edge of the unwelded end to the outer edge of the rotating flange 7 in one circle;

[0093] Step 2.6, phosphating, forms a phosphating film on the surface of the oil pipe 8 through chemical and electrochemical reactions.

[0094] In the horizontal welding process, before assembly welding, first fix the position of the fixed flange 6, weld the fixed flange 6 to one end of the oil pipe 8 in a straight state, then adjust and fix the angle of the rotating flange 7, adjust the distance between the fixed flange 6 and the rotating flange 7, and fix and weld the other end of the oil pipe 8 to the rotating flange 7. After welding other oil pipes 8 to be processed in the same batch, there is no need to adjust the angle of the rotating flange 7. It is only necessary to assemble the two ends of the oil pipe 8 to the fixed flange 6 and the rotating flange 7 and then weld and fix them. It is easy to operate, reduces the workload of workers, improves welding efficiency, and ensures processing quality. After welding, the oil pipe 8 is phosphated to form a phosphating film on the surface of the oil pipe 8, which protects the oil pipe 8 and prevents the oil pipe 8 from being corroded.

[0095] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A process for welding and then bending an extra-long pipe flange, characterized in that: A super-long pipe flange elbow welding device is provided, and the super-long pipe flange elbow welding device comprises: A base (1), wherein a fixed flange seat (2) and a rotating flange seat (3) are provided on the base (1) for relative sliding movement, and the fixed flange seat (2) and the rotating flange seat (3) are provided with correspondingly facing fixed flanges (6) and rotating flanges (7); and a rotating motor (31) is provided on the rotating flange seat (3) for driving the rotating flange (7) to rotate; A rotating disk (32) is rotatably arranged on the surface of the rotating flange seat (3), and the rotating motor (31) is drivingly connected to the rotating disk (32); a rotating flange positioning column (34) is installed on the surface of the rotating disk (32), and the rotating flange positioning column (34) cooperates with the rotating flange (7) for positioning; The rotating disk (32) is provided with two rotating grooves (32-1), and the rotating grooves (32-1) are slidably matched with rotating sliders (33); there are two rotating flange positioning columns (34) and they are fixedly connected to the rotating sliders (33) in a one-to-one correspondence; Two electric push rods (35) are connected to the outer edge of the rotating disk (32), and the electric push rods (35) correspond to the rotating slider (33) one by one; the electric push rods (35) comprise a driving motor (351), a screw rod (352) and a moving block (353); the driving motor (351) is fixedly connected to the rotating disk (32) and is drivingly connected to the screw rod (352); the moving block (353) is threadably matched with the screw rod (352) and is fixedly connected to the rotating slider (33) via a sliding rod (354); The fixed flange seat (2) comprises a base plate (21) and a fixed plate (22) connected to each other; a fixed flange positioning column (23) is mounted on the surface of the fixed plate (22), and the fixed flange positioning column (23) cooperates with the fixed flange (6) for positioning; the base plate (21) and the base (1) are slidably matched; two fixing grooves (22-1) are provided on the fixed plate (22), and the fixing grooves (22-1) penetrate the side surfaces of the fixed plate (22); a fixing slider (24) is slidably matched with the fixing groove (22-1), and the fixing slider (24) is fixedly connected to the fixed flange positioning column (23); It also includes a translation assembly (4), the translation assembly (4) being drivingly connected to the chassis (21); The base (1) is arranged horizontally, and the rotating flange seat (3) is arranged above the base (1); the translation assembly (4) comprises a rotating motor (41), a driving gear (42), a driven gear (43), a chain (44) and a guide gear (45); the rotating motor (41) is fixed to one end of the base (1), and the output end of the rotating motor (41) is drivingly connected to the driving gear (42); the chain (44) is in the shape of a crawler; the driven gear (43) and the driving gear (42) are respectively located at the inner ends of the chain (44), and the guide gear (45) is rotatably arranged below the base (1) and connected to the chain (44); the upper and lower layers of the chain (44) are respectively located above and below the base (1), the fixed flange seat (2) is connected to the upper layer of the chain (44), and the guide gear (45) is connected to the lower layer of the chain (44); The base (1) is also provided with at least two oil pipe support members (5), and the oil pipe support members (5) are distributed along the long side direction of the base (1); the base (1) is provided with a strip-shaped sliding opening (1-1), and the extension direction of the strip-shaped sliding opening (1-1) is consistent with the distribution direction of the oil pipe support members (5); the oil pipe support member (5) comprises a sliding shaft (51) slidably matched with the strip-shaped sliding opening (1-1) and a supporting protrusion (52) fixed above the sliding shaft (51), and the two sides of the top of the supporting protrusion (52) are fixedly connected to a limiting rod (53), and the axial direction of the limiting rod (53) is consistent with the axial direction of the sliding shaft (51); The process of welding and then bending an extra-long pipe flange comprises the following steps: Step 1: unloading, transporting the straight oil pipe (8) to the processing site; Step 2: Horizontal welding: adjust the oil pipe to a horizontal angle and then perform welding. Specifically: Step 2.1: Fixing: welding one end of the oil pipe to the fixed flange (6) at a fixed position; Step 2.2: Adjustment, by rotating the motor (31) to adjust the turntable (32) to a predetermined angle; by adjusting the two rotating slide blocks (33) to slide in the two rotating grooves (32-1) through two electric push rods (35), at which time the two rotating flange positioning columns (34) are adjusted to predetermined positions; the rotating flange (7) is matched with the two rotating flange positioning columns (34) for positioning connection; Step 2.3: Assembling, the fixed flange seat (2) is driven to move by the rotating motor (41), and the unwelded end of the oil pipe is brought into contact with the rotating flange (7) under the drive of the fixed flange seat (2); Step 2.4: Spot welding to fix the unwelded end to the rotating flange (7) by electric welding; Step 2.5: Welding: Use a welding machine to weld the outer edge of the unwelded end to the outer edge of the rotating flange (7) in one circle; Step 3, bending the pipe, bending the straight pipe by cold bending or hot pushing; Between step 2.5 and step 3, the following steps are also included: Step 2.6, phosphating, forms a phosphating film on the surface of the oil pipe (8) through chemical and electrochemical reactions.

Images