Welding device for seamless steel pipe machining

Abstract

The invention discloses a welding device for seamless steel pipe machining, and particularly relates to the technical field of plasma welding, the welding device comprises a main pipe and a limiting plate, an adjusting plate and a fixing plate which are fixed on a base, and the main pipe is composed of a left pipe, a middle pipe and a right pipe; an inverted U-shaped frame is fixedly installed on the limiting plate and the adjusting plate jointly, an air cylinder is fixedly installed on the U-shaped frame, a telescopic rod is installed on the air cylinder, and a plasma welding gun matched with the header pipe is fixedly installed at the lower end of the telescopic rod. The device has the advantages that main pipes can be rapidly clamped and limited, the overall angle of the main pipes can be adjusted as needed, the positions between the main pipes cannot be changed while the angle of the main pipes is adjusted, the main pipes are always in an aligned state, the device can also limit and clamp the main pipes with different thicknesses, and the clamping efficiency is improved. And plasma welding can be effectively carried out on the header pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of plasma welding, and particularly to a welding device for seamless steel pipe processing. Background Art

[0002] Seamless steel pipes have become irreplaceable materials in harsh environments such as high pressure, high temperature, and corrosion. Or, like the exhaust pipes of some high-performance cars, seamless steel pipes are not simply cylindrical, and some are designed in different shapes according to specific usage scenarios. During specific use, the part to be welded is first clamped, and then the plasma welding equipment is used for welding operations.

[0003] Although such welding devices can clamp and limit the main pipe, they also have the following deficiencies. The current device only clamps and fixes the main pipe, but the welding of the main pipe is a comprehensive process. After the upper part of the main pipe is welded, the clamping mechanism needs to be loosened to adjust the angle of the main pipe, and the main pipe needs to be clamped and fixed again during the adjustment process, making the welding operation complex and unable to be carried out continuously. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the angle of the main pipe cannot be directly adjusted after being clamped and limited in the prior art, and to propose a welding device for seamless steel pipe processing.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A welding device for seamless steel pipe processing includes a main pipe, as well as a limiting plate, an adjusting plate, and a fixing plate fixed on a base. The main pipe is composed of a left pipe, a middle pipe, and a right pipe.

[0007] An inverted U-shaped frame is fixedly installed on the limiting plate and the adjusting plate together. A cylinder is fixedly installed on the U-shaped frame. A telescopic rod is installed on the cylinder, and a plasma welding gun cooperating with the main pipe is fixedly installed at the lower end of the telescopic rod.

[0008] Limiting members are installed on both the limiting plate and the adjusting plate. A plurality of sliders are slidably installed on the base through a plurality of sliding rods, and a lifting plate is slidably installed between the plurality of sliders through a lifting frame. A lifting member is installed at the lower end of the lifting plate, and a clamp is fixedly installed on the lifting plate through a self-locking universal joint.

[0009] A worm is rotatably installed on the limiting plate, and an annular worm gear cooperating with the worm is installed on the limiting member located on the limiting plate.

[0010] A transmission member is installed between the worm and the base.

[0011] Compared with the existing technology, the advantages of the present invention are as follows:

[0012] 1: When the present invention performs plasma welding treatment on the main pipe, it has the advantages of quickly limiting and clamping the main pipe. At the same time, the clamping structure is simple and easy to operate, which can improve the accuracy of welding the main pipe and the overall processing efficiency.

[0013] 2: When the present invention performs plasma welding treatment on the main pipe, it has the advantages of limiting and fixing the main pipe while controlling its overall synchronous angle adjustment. When the welding of the upper part of the main pipe is completed, the driving motor can accurately rotate multiple main pipes to be welded synchronously, ensuring that technicians can weld the main pipe in all directions without disassembly, effectively improving the flexibility of the device.

[0014] 3: When the present invention performs plasma welding treatment on the main pipe, it has the advantage of being able to limit and weld main pipes with different thicknesses and lengths. The distance between the lifting frame and the limiting plate can be controlled to limit main pipes with different lengths, improving the flexibility of the device.

[0015] 4: When the present invention performs grinding and polishing treatment on the surface of the main pipe, it has the advantage that the surface welding slag is easy to clean. The structure on the base of the present invention is simple. When welding the main pipe, the welding slag generated will fall onto the base. The surface structure of the base is less, and its surface can be directly cleaned, avoiding damage to the equipment during the cleaning of the base and reducing the workload of technicians.

[0016] In summary, the present invention can quickly clamp and limit the main pipe, and can also perform overall angle adjustment on the main pipe when needed. At the same time, when adjusting the angle of the main pipe, the position between the main pipes will not be changed, so that the main pipes are always in an aligned state. In addition, the present invention can also limit and clamp main pipes with different thicknesses, and can effectively perform plasma welding on the main pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a welding device for seamless steel pipe processing proposed by the present invention;

[0018] Figure 2 is Figure 1 a schematic structural diagram after rotating a certain angle;

[0019] Figure 3 is Figure 1 a schematic internal structure diagram;

[0020] Figure 4 is a schematic structural diagram of the driving part;

[0021] Figure 5 is a schematic structural diagram of the limiting structure;

[0022] Figure 6 is a schematic diagram of the lifting structure;

[0023] Figure 7 is a schematic diagram of the fixture structure;

[0024] Figure 8 is Figure 1 a schematic diagram of a partial structure;

[0025] Figure 9 is a schematic diagram of the internal structure of the adjusting plate;

[0026] Figure 10 is Figure 9 a schematic diagram of the structural decomposition.

[0027] In the figure: 1, base; 2, limit plate; 3, adjusting plate; 4, fixing plate; 5, main pipe; 6, sliding rod; 7, slider; 8, fixture; 9, lifting box; 10, limit disc; 11, worm gear; 12, worm; 13, first main gear; 14, first driven gear; 15, first transmission ring; 16, second main gear; 17, second driven gear; 18, lifting plate; 19, fixing bolt; 20, second transmission ring; 21, reciprocating lead screw; 22, self-locking universal joint; 23, rotating shaft; 24, limit rod; 25, mating sleeve; 26, outer ring; 27, clamping rod; 28, inner ring; 29, servo motor; 30, shaft gear; 31, toothed ring; 32, rotating gear; 33, linkage rod; 34, first linkage belt; 35, central shaft; 36, turntable; 37, mounting cylinder; 38, second linkage belt. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. 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.

[0029] Refer to Figures 1-10, A welding device for seamless steel pipe processing, including a base 1 and a main pipe 5. The main pipe 5 is composed of a left pipe, a middle pipe, and a right pipe (for the convenience of understanding, the left pipe is the part on the left side, the middle pipe is the part in the middle, and the right pipe is the part on the right side); the two ends of the middle pipe are respectively welded to the left pipe and the right pipe, and after completion, it is the complete main pipe 5. A reversed U-shaped frame (not shown in the figure) is fixedly installed on the limiting plate 2 and the adjusting plate 3 together. A cylinder is fixedly installed on the U-shaped frame, and a telescopic rod is installed on the cylinder. The lower end of the telescopic rod is fixedly installed with a plasma welding gun that matches the main pipe 5. Other structures or devices for controlling lifting can also be used to replace the above-mentioned cylinder and telescopic rod. When the plasma welding gun is used, it is equipped with a corresponding welding control system, welding power supply, gas supply and cooling system. These are prior arts and are not shown in the figure, so no specific description is given here.

[0030] Limiting part, which is used to limit and fix the new energy main pipe 5. The limiting part includes a limiting plate 2 and an adjusting plate 3 fixedly installed on the base 1. The limiting plate 2 is named for its function and is a support plate used to cooperate with other structures to limit the main pipe 5. Other corresponding technical features in the text are also named in this way for the convenience of distinction and understanding. The limiting plate 2 and the adjusting plate 3 are respectively fixedly installed at both ends of the base 1. Triangular brackets are fixedly installed at the lower ends of the limiting plate 2 and the adjusting plate 3. The function of the triangular brackets is to ensure the stability of the limiting plate 2 and the adjusting plate 3, and the two cooperate to support the main pipe 5. Rubber sleeves are fixedly sleeved on the two upper corners of the limiting plate 2 and the adjusting plate 3. The function of the rubber sleeves is to prevent technicians from bumping into the corners when welding the main pipe 5, causing harm to the technicians' bodies and improving the safety of the device.

[0031] Refer to Figures 1-10 , Limiting components are installed on both the limiting plate 2 and the adjusting plate 3. The limiting components include a limiting disk 10, a rotating shaft 23, a limiting rod 24, a mating sleeve 25, a clamping rod 27, and an annular assembly. Limiting disks 10 are installed on both the limiting plate 2 and the adjusting plate 3. The limiting disk 10 on the limiting plate 2 is rotatably arranged around its own center, and the limiting disk 10 on the adjusting plate 3 is rotatably arranged around the central axis 35.

[0032] An annular assembly is rotatably installed on the two limiting disks 10. The annular assembly is composed of an inner ring 28 and an outer ring 26. The inner ring 28 is rotatably installed on the limiting disk 10, the outer ring 26 is fixedly installed on the inner ring 28 through a connecting block, and the mating sleeve 25 is rotatably installed between the inner ring 28 and the outer ring 26.

[0033] There are three connecting blocks arranged between the inner ring 28 and the outer ring 26, and the three connecting blocks are respectively installed at the 120° angular positions on the inner ring 28. The three connecting blocks can effectively improve the linkage and stability between the inner ring 28 and the outer ring 26. The function of the connecting block is that when the inner ring 28 rotates, it can drive the outer ring 26 to rotate synchronously through the connecting block, playing a role in linkage. The fitting sleeve 25 is rotatably installed between the inner ring 28 and the outer ring 26, so that when the inner ring 28 rotates, its fitting sleeve 25 can rotate to adjust the angle.

[0034] A linkage block is fixedly installed on the inner ring 28. The limit disc 10 fixedly installs a servo motor 29 through a support block, and the support block is rotatably installed on the limit plate 2. The driving end of the servo motor 29 is fixedly connected with a threaded rod. A reciprocating slider is threadedly installed on the threaded rod, and the reciprocating slider is rotatably installed on the linkage block through a shaft rod. A second bearing is fixedly installed in the reciprocating slider, and the second bearing is fixedly connected with the reciprocating slider through the outer ring. The inner ring of the second bearing is provided with a thread, and the second bearing is threadedly installed on the threaded rod through the inner ring. So that when the servo motor 29 drives the threaded rod to rotate, it can drive the reciprocating slider to move along the threaded rod through the second bearing, and at the same time drive the linkage block to rotate. When rotating, it can drive the inner ring 28 to rotate, and the main pipe 5 can be clamped and limited.

[0035] The function of the servo motor 29 is: using mechanical control to clamp and limit the main pipe 5, making the clamping and limiting more accurate while ensuring the structural stability, preventing the inner ring 28 from rotating reversely under the action of external force and affecting the clamping effect of the device. An annular limiting groove is formed on the limit disc 10, and a slide bar matched with the annular limiting groove is fixedly installed on the reciprocating slider. The annular limiting groove is concentric with the inner ring 28 and has a radius larger than that of the inner ring 28. The function of the annular limiting groove is to ensure that when the reciprocating slider is driven by the threaded rod, it always moves along the outer circle of the inner ring 28 to prevent jamming.

[0036] A plurality of rotating shafts 23 are rotatably installed on the limit disc 10. A plurality of fitting sleeves 25 are jointly rotatably installed on the inner ring 28 and the outer ring 26. A limiting rod 24 is fixedly installed on each rotating shaft 23, and each limiting rod 24 is slidably sleeved in the corresponding fitting sleeve 25. A clamping rod 27 is fixedly installed on each limiting rod 24. When the inner ring 28 rotates, the inner ring 28 and the outer ring 26 cooperate with each other to make the limiting rod 24 rotate axially along the rotating shaft 23, and when the rotating shaft 23 rotates axially, the clamping rod 27 fixedly installed at its upper end limits and fixes the main pipe 5.

[0037] One side of the clamping rod 27 in contact with the main pipe 5 is fixedly installed with a rubber clamping block through a spring (not marked in the figure). The rubber clamping block is semi-circular, which can better fit with the main pipe 5 to improve the clamping stability. At the same time, the rubber clamping block can increase the friction force of the clamping rod 27 on the main pipe 5, improve the clamping force on the main pipe 5, and protect the surface of the main pipe 5 to prevent scratches. The function of the spring is to reduce the scratching of the main pipe 5 due to jitter. The spring can effectively reduce the jitter of the main pipe 5, making the device more stable when clamping and fixing the main pipe 5.

[0038] Refer to Figures 1-10 , a plurality of sliding rods 6 are fixedly installed on the base 1, and a plurality of sliders 7 are slidably installed on the plurality of sliding rods 6. A lifting frame is fixedly installed among the plurality of sliders 7, and both sides of the lifting frame are slidably installed with a lifting plate 18 through sliding grooves; both sides of the lifting plate 18 are fixedly installed with sliders 7, and the lifting plate 18 is damping slidably installed in the sliding groove through the sliders 7, so that the lifting plate 18 can freely slide along the sliding groove under the condition of being driven after being subjected to no external force to adjust the angle of the middle pipe.

[0039] The slider 7 is provided with a sliding hole matching with the sliding rod 6, and a layer of rubber gasket is fixedly installed inside the sliding hole. The rubber gasket can effectively prevent the slider 7 from scratching between the devices when sliding, protect the device from scratches, and at the same time increase the friction force between the slider 7 and the sliding rod 6, making it more stable when clamping and limiting the middle pipe.

[0040] A transmission member is installed between the worm 12 and the base 1. The transmission member includes a first main gear 13, a transmission shaft, a first driven gear 14, a first transmission ring 15, a second main gear 16, a linkage rod 33 and a first transmission belt 34. The transmission shaft is rotatably installed on the base 1, and the upper end of the transmission shaft is fixedly installed with a first driven gear 14 meshing with the first main gear 13; the functions of the first main gear 13 and the first driven gear 14 are to play a linkage role. When the worm 12 rotates, the first driven gear 14 on the transmission shaft can be driven to rotate through the mutual cooperation of the first main gear 13 and the first driven gear 14 to complete the transmission; the transmission shaft is fixedly installed with a first transmission ring 15 and a second main gear 16. An installation plate is fixedly installed on the base 1, and a linkage rod 33 is rotatably installed on the installation plate. One end of the linkage rod 33 is fixed with a second driven gear 17 matching with the second main gear 16, and the linkage rod 33 and the central shaft 35 are cooperatively installed with a first transmission belt 34.

[0041] Refer to Figures 1-10, a lifting member is installed at the lower end of the lifting plate 18. The lifting member includes a lifting box 9, a second transmission ring 20, a reciprocating lead screw 21, and a first bearing. The lifting box 9 is fixedly installed on the base 1, and the second transmission ring 20 is rotatably installed at the upper end of the lifting box 9. The reciprocating lead screw 21 is threadedly installed on the second transmission ring 20, and the upper end of the reciprocating lead screw 21 is rotatably installed with the lifting plate 18. A second linkage belt 38 is jointly sleeved and fitted with the first transmission ring 15 and the second transmission ring 20; when the first transmission ring 15 rotates, it can drive the second transmission ring 20 to rotate through the second linkage belt 38 and the first bearing. The rotation of the second transmission ring 20 will cause the reciprocating lead screw 21 threadedly installed thereon to move upward synchronously, so that the middle tube is always at an appropriate height; a circular opening is provided at the upper end of the lifting box 9, and the first bearing is fixedly installed in the circular opening. The inner ring of the first bearing is fixedly connected to the second transmission ring 20; the function of the bearing is that when the second transmission ring 20 rotates, it will drive the inner ring of the bearing to rotate. The rotation of the inner ring of the bearing can control the reciprocating lead screw 21 to move upward or downward along the bearing, and the reciprocating lead screw 21 can control the lifting plate 18 to move upward or downward;

[0042] A clamp 8 is fixedly installed on the lifting plate 18 through a self-locking universal joint 22. The clamp 8 is composed of two arc-shaped clamping plates and an installation bolt. Installation holes are provided at the upper ends of the two arc-shaped clamping plates, and the installation bolt is threadedly installed in the two installation holes together; the arc-shaped clamping plates are set to be semi-circular, so that the arc-shaped clamping plates can closely adhere to the middle tube, increasing the fit between the two and improving the clamping effect of the device. At the same time, the two arc-shaped clamping plates can be limited and supported for the middle tube by threadedly installing the installation bolt in the two installation holes. The purpose of the clamp 8 is to limit and support the middle tube without affecting the subsequent rotation of the middle tube along with the left tube and the right tube.

[0043] A slide rail (not shown in the figure) is provided at the upper end of the base 1. A spring block is fixedly installed at the lower end of each sliding rod 6, and the sliding rod 6 is slidably installed on the slide rail through the spring block; the sliding rod 6 can slide on the slide rail to adjust the distance between the clamp 8 and the limiting plate 2 and the adjusting plate 3, so as to clamp and limit the main pipe 5 of different length specifications, improving the flexibility of the device; the reciprocating lead screw 21 is threadedly installed on the second transmission ring 20, and the upper end of the reciprocating lead screw 21 is rotatably installed with the lifting plate 18. A second linkage belt 38 is jointly sleeved and fitted with the first transmission ring 15 and the second transmission ring 20.

[0044] The first transmission ring 15 and the second transmission ring 20 are jointly sleeved with a second linkage belt 38, so that when the driving motor drives the worm 12 to rotate, the limit disk 10 will rotate, and at the same time drive the reciprocating lead screw 21 to move upward through the second linkage belt 38, so that the rotation of the limit disk 10 and the rotation of the reciprocating lead screw 21 are always guaranteed to be on the same horizontal plane, ensuring the welding accuracy of the main pipe 5; A plurality of equally spaced threaded holes are formed in the lifting plate 18, and a fixing bolt 19 is threadedly installed in each threaded hole, and one end of the fixing bolt 19 is fixedly sleeved with a rubber ring for increasing the friction between the fixing bolt 19 and the lifting plate 18;

[0045] The self-locking universal joint 22 realizes the locking and releasing of the self-locking universal joint 22 by the force of the adjusting screw and the spring. When it is necessary to lock the self-locking universal joint 22, the elastic force of the spring on the screw makes the screw stuck at the connection of the self-locking universal joint 22 to complete the locking of the self-locking universal joint 22; When torque needs to be transmitted, the locking mechanism locks the universal joint to make it a rigid connection. When angular displacement is allowed, the locking mechanism releases the universal joint to make it a flexible connection (this is the prior art and will not be elaborated here);

[0046] The function of the fixing bolt 19 is that when the centering pipe is limited and fixed, the fixing bolt 19 can be tightened to increase the friction between the lifting plate 18 and the lifting frame, thereby ensuring that the lifting plate 18 will not move, improving the clamping and limiting effect of the centering pipe; The rubber ring can further increase the friction between the fixing bolt 19 and the lifting plate 18, improving the stability of the device when limiting and fixing the centering pipe; When it is necessary to adjust the angle of the middle pipe, loosen the fixing bolt 19 by hand, so that the lifting plate 18 can move freely along the chute, and at the same time turn on the self-locking universal joint 22 so that the fixture 8 can be adjusted along any angle and height, ensuring the welding accuracy when the main pipe 5 is adjusted in angle.

[0047] Refer to Figures 1-10 As shown in the figure, the adjusting part can rotate and adjust the left pipe and the right pipe after limiting and fixing, and perform all-round welding on the main pipe 5. The adjusting part includes a limit disk 10 rotatably installed on the limit plate 2. A worm gear 11 is fixedly installed on the limit disk 10, and a worm 12 engaged with the worm gear 11 is rotatably installed on the limit plate 2; A driving motor is fixedly installed on the base 1 through a fixing block, and the driving end of the driving motor is fixedly connected with one end of the worm 12; The function of the worm 12 is that when the driving motor drives the worm 12 to rotate through the driving end, the limit disk 10 can be driven to rotate through the worm gear 11, realizing the adjustment of the angle of the main pipe 5. At the same time, the worm gear 11 will not drive the worm 12 to rotate, realizing the self-locking function.

[0048] A fixing plate 4 is fixedly installed on the base 1. An installation cylinder 37 is rotatably installed on the fixing plate 4 through a central shaft 35. One end of the central shaft 35 is fixedly installed with a shaft gear 30. The installation cylinder 37 is rotatably installed with a rotating gear 32 through a turntable 36. A toothed ring 31 that cooperates with the rotating gear 32 is rotatably installed on the adjusting plate 3. When the shaft gear 30 rotates, the rotating gear 32 can move along the surface of the shaft gear 30 under the action of the tooth blocks on the shaft gear 30 and the toothed ring 31. At the same time, the rotating gear 32 can rotate through the turntable 36 to realize the angle adjustment of the main pipe 5.

[0049] A driving part can realize the synchronous rotation of the device for the left pipe and the right pipe. The driving part includes a first main gear 13 fixedly installed on the worm 12. A transmission shaft is rotatably installed on the base 1. A first transmission ring 15 and a second main gear 16 are fixedly installed on the transmission shaft. An installation plate is fixedly installed on the base 1. A linkage rod 33 is rotatably installed on the installation plate. One end of the linkage rod 33 is fixed with a second driven gear 17 that cooperates with the second main gear 16. The linkage rod 33 and the central shaft 35 are jointly sleeved with a first linkage belt 34. The function of the driving part is that when adjusting the angles of multiple main pipes 5 to be welded together, the same driving motor is used for driving to ensure that when the main pipe 5 rotates, the left pipe and the right pipe can rotate synchronously, ensuring the welding precision of the main pipe 5.

[0050] Toothed rings are integrally formed on the first transmission ring 15, the second transmission ring 20, the linkage rod 33 and the central shaft 35. Inner teeth that mesh with the toothed rings are integrally formed on the inner walls of the first linkage belt 34 and the second linkage belt 38. And a plurality of corresponding inner teeth are arranged to form a closed loop. The first transmission ring 15, the second transmission ring 20 and the first linkage belt 34 are interlinked and meshed through the toothed rings and the inner teeth. The linkage rod 33, the central shaft 35 and the second linkage belt 38 are also meshed through the toothed rings and the inner teeth.

[0051] Two protective covers (not shown in the figure) are fixedly installed on the base 1. The first linkage belt 34 and the second linkage belt 38 are both located inside the protective covers. The outer wall of the protective cover is a smooth surface. The function of the protective cover is to prevent some welding slag from falling onto the first linkage belt 34 and the second linkage belt 38 during the welding of the main pipe 5, which will affect their linkage function and is not easy to clean. The smooth protective cover is convenient for cleaning, and the welding slag falling on its surface can be cleaned by scraping. The operation is simple and it is convenient to maintain the device.

[0052] Further explanation, the above fixed connection, unless otherwise clearly specified and limited, should be understood in a broad sense. For example, it can be welding, gluing, or integrally formed setting, etc., which are common means well-known to those skilled in the art.

[0053] The usage state of the present invention is as follows:

[0054] Limit fixation of the main pipe 5 before welding: First, place the middle pipe in the fixture 8, tighten the mounting bolts, and use the two arc-shaped clamping plates to clamp and limit the middle pipe; then place the left pipe and the right pipe, making one end of them fit with the middle pipe and the other ends located in the corresponding limit discs 10 respectively. Turn on the servo motor 29. At this time, the servo motor 29 drives the corresponding threaded rod to rotate through the driving end. The rotation of the threaded rod will drive the reciprocating slider thereon to move along the threaded rod. The reciprocating slider pushes the inner ring 28 to rotate counterclockwise through the linkage block. The inner ring 28 drives the outer ring 26 to rotate synchronously through the connecting block. At this time, the clamping rod 27 rotates axially inward along the rotating shaft 23 under the action of the mating sleeve 25. At the same time, the clamping rod 27 on the clamping rod 27 will clamp and fix the left pipe and the right pipe;

[0055] Angle adjustment of the welded main pipe 5: When the welding of the upper part of the main pipe 5 is completed, rotate and adjust the main pipe 5. Turn on the driving motor. The driving motor drives the worm 12 to rotate through the driving end. The worm 12 drives the limit disc 10 to rotate through the cooperation with the worm gear 11. When the limit disc 10 rotates, it can drive the right pipe in the limit disc 10 to rotate. At the same time, the first transmission ring 15 drives the second transmission ring 20 through the second transmission belt 38. The second transmission ring 20 drives the reciprocating lead screw 21 to move reciprocally along the vertical direction through the bearing. At the same time, the linkage rod 33 drives the central shaft 35 to rotate through the first transmission belt 34. The rotation of the central shaft 35 drives the shaft gear 30 to rotate, causing the rotating gear 32 to rotate along the surface of the shaft gear 30, thereby driving the left pipe to rotate and completing the angle adjustment of the main pipe 5.

[0056] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A welding device for seamless steel pipe processing, characterized in that, It includes a main pipe (5), a limit plate (2), an adjustment plate (3), and a fixing plate (4) fixed on a base (1). The main pipe (5) is composed of a left pipe, a middle pipe, and a right pipe; An inverted U-shaped frame is fixedly installed on the limit plate (2) and the adjustment plate (3) together. A cylinder is fixedly installed on the U-shaped frame. A telescopic rod is installed on the cylinder, and the lower end of the telescopic rod is fixedly installed with a plasma welding gun adapted to the main pipe (5); Limit members are installed on both the limit plate (2) and the adjustment plate (3). A plurality of sliders (7) are slidably installed on the base (1) through a plurality of sliding rods (6), and a lifting plate (18) is slidably installed among the plurality of sliders (7) through a lifting frame. A lifting member is installed at the lower end of the lifting plate (18), and a clamp (8) is fixedly installed on the lifting plate (18) through a self-locking universal joint (22); A worm (12) is rotatably installed on the limit plate (2), and an annular worm wheel (11) adapted to the worm (12) is installed on the limit member on the limit plate (2); A transmission member is installed between the worm (12) and the base (1).

2. The welding device for seamless steel pipe processing according to claim 1, characterized in that, The limit member includes a limit disc (10), a rotating shaft (23), a limit rod (24), a mating sleeve (25), a clamping rod (27), and an annular assembly. Limit discs (10) are installed on both the limit plate (2) and the adjustment plate (3). Annular assemblies are rotatably installed on both limit discs (10). A plurality of rotating shafts (23) are rotatably installed on both limit discs (10). A plurality of mating sleeves (25) are rotatably installed on the annular assembly. A limit rod (24) is fixedly installed on each rotating shaft (23), and each limit rod (24) is slidably sleeved in the corresponding mating sleeve (25). A clamping rod (27) is fixedly installed on each limit rod (24); The annular assembly is composed of an inner ring (28) and an outer ring (26). The inner ring (28) is rotatably installed on the limit disc (10). The outer ring (26) is fixedly installed on the inner ring (28) through a connecting block, and the mating sleeve (25) is rotatably installed between the inner ring (28) and the outer ring (26); An installation cylinder (37) is rotatably installed on the fixing plate (4) through a central shaft (35). A shaft gear (30) is fixedly installed at one end of the central shaft (35). The installation cylinder (37) is rotatably installed with a rotating gear (32) through a turntable (36). A tooth ring (31) adapted to the rotating gear (32) is rotatably installed on the adjustment plate (3).

3. The welding device for seamless steel pipe processing according to claim 2, characterized in that, A linkage block is fixedly installed on the inner ring (28). A servo motor (29) is fixedly installed on the limit disc (10) through a support block, and the support block is rotatably installed on the limit plate (2). The driving end of the servo motor (29) is fixedly connected with a threaded rod. A reciprocating slider is threadedly installed on the threaded rod, and the reciprocating slider is rotatably installed on the linkage block through a shaft rod; An annular limit groove is formed on the limit disc (10), and a slide rod adapted to the annular limit groove is fixedly installed on the reciprocating slider.

4. A welding device for seamless steel pipe processing according to claim 1, characterized in that, The lifting member includes a lifting box (9), a second transmission ring (20), and a reciprocating lead screw (21). The lifting box (9) is fixedly installed on the base (1), and the second transmission ring (20) is rotatably installed at the upper end of the lifting box (9). The reciprocating lead screw (21) is threadedly installed on the second transmission ring (20), and the upper end of the reciprocating lead screw (21) is rotatably installed with the lifting plate (18). The first transmission ring (15) and the second transmission ring (20) are jointly sleeved with a second linkage belt (38).

5. A welding device for seamless steel pipe processing according to claim 1, characterized in that, A plurality of equally spaced threaded holes are formed in the lifting plate (18). A fixing bolt (19) is threadedly installed in each threaded hole, and a rubber ring for increasing the friction between the fixing bolt (19) and the lifting plate (18) is fixedly sleeved at one end of the fixing bolt (19).

6. The welding device for seamless steel pipe processing according to claim 2, characterized in that, The transmission member includes a first main gear (13), a transmission shaft, a first driven gear (14), a first transmission ring (15), a second main gear (16), a linkage rod (33), and a first linkage belt (34). The first main gear (13) is fixedly installed on the worm (12). The transmission shaft is rotatably installed on the base (1), and the first driven gear (14) meshing with the first main gear (13) is fixedly installed at the upper end of the transmission shaft; The first transmission ring (15) and the second main gear (16) are fixedly installed on the transmission shaft. The mounting plate is fixedly installed on the base (1), and the linkage rod (33) is rotatably installed on the mounting plate. A second driven gear (17) cooperating with the second main gear (16) is fixed at one end of the linkage rod (33). The linkage rod (33) and the central shaft (35) are cooperatively installed with the first linkage belt (34).

7. A welding device for seamless steel pipe processing according to claim 1, characterized in that, The fixture (8) consists of two arc-shaped clamping plates and a mounting bolt. The two arc-shaped clamping plates are fixedly installed at the upper end of the self-locking universal joint (22). Mounting holes are formed at the upper ends of the two arc-shaped clamping plates, and the two mounting holes are jointly threadedly installed with the mounting bolt.

8. A welding device for seamless steel pipe processing according to claim 1, characterized in that, The upper end of the base (1) is fixedly installed with a slide rail. A spring block is fixedly installed at the lower end of each sliding rod (6), and the sliding rod (6) is slidably installed on the slide rail through the spring block.

9. The welding device for seamless steel pipe processing according to claim 6, characterized in that, Toothed rings are integrally formed on the first transmission ring (15), the second transmission ring (20), the linkage rod (33), and the central shaft (35). Inner teeth meshing with the toothed rings are integrally formed on the inner walls of the first linkage belt (34) and the second linkage belt (38). A plurality of corresponding inner teeth are arranged to form a closed loop. The first transmission ring (15), the second transmission ring (20), and the first linkage belt (34) are interlocked and meshed through the toothed rings and the inner teeth. The linkage rod (33), the central shaft (35), and the second linkage belt (38) are also meshed through the toothed rings and the inner teeth.

10. The welding device for seamless steel pipe processing according to claim 4, characterized in that, A circular opening is formed at the upper end of the lifting box (9). A first bearing is fixedly installed in the circular opening, and the inner ring of the first bearing is fixedly connected to the second transmission ring (20).

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