Welding equipment for steel pipes

Abstract

The present invention relates to the field of steel pipe welding, and discloses a welding device for steel pipes, comprising a fixed platform and a bracket, wherein brackets are welded at both ends of the fixed platform, movable structures are arranged at both sides of the fixed platform, a shielding welding structure is arranged in the middle of the fixed platform, and storage structures are arranged on both sides of the fixed platform near the middle, wherein a plurality of steel pipes are stored in the storage structure, and two steel pipes on two storage structures can be automatically pushed for loading through the movable structure and the pushing structure, and the ends of the two pushed steel pipes close to each other are pressed together for welding, and when the two sets of pushing structures are pulled apart after welding, the welded steel pipes can be directly dropped into a collecting frame for unloading under the action of the gravity of the welded steel pipes themselves, so that the operation is time-saving and labor-saving, and the manufacturing cost is lower.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe welding, and in particular to a welding device for steel pipes. Background Art

[0002] Steel with a hollow section whose length is much larger than its diameter or circumference. According to the cross-sectional shape, it is divided into round, square, rectangular and special-shaped steel pipes. According to the material, it is divided into carbon structural steel pipes, low alloy structural steel pipes, alloy steel pipes and composite steel pipes. According to the purpose, it is divided into steel pipes for transportation pipelines, engineering structures, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, high-pressure equipment, etc. When welding steel pipes, welding equipment is needed;

[0003] In the prior art, the welding equipment for steel pipes needs to use a clamp to clamp the two steel pipes against each other during welding, which requires manual feeding of the steel pipes, and the steel pipes need to be loosened again after welding. The welded steel pipes need to be manually removed, which is time-consuming and laborious. Alternatively, two sets of mechanical arms and mechanical claws are used to automatically grab the steel pipes and press them against each other for welding, which increases the welding cost of the steel pipes. Therefore, there is room for improvement. Summary of the invention

[0004] In order to solve the problems mentioned in the above background technology, the present invention provides a welding device for steel pipes.

[0005] The present invention provides a welding device for steel pipes adopting the following technical solution:

[0006] A welding device for steel pipes, comprising a fixed platform and a bracket, brackets are welded at both ends of the bottom of the fixed platform, movable structures are arranged at both sides of the top of the fixed platform, a shielding welding structure is arranged in the middle of the top of the fixed platform, and storage structures are arranged on both sides of the top of the fixed platform near the middle, wherein a plurality of steel pipes are stored in the storage structure;

[0007] The movable structure comprises a first guide groove opened on both sides of the fixed platform, a guide rod is connected between the groove walls at both ends of each of the first guide grooves, a movable plate is movably sleeved on each of the guide rods, and a pushing structure is arranged on the movable plate, and the front and rear side surfaces of the movable plate are respectively attached to the front and rear inner walls of the first guide groove, and screws are respectively rotated and passed through the threaded grooves at the bottom ends of the two movable plates, and an intermediate rod is connected between one end of the two screws that are rotated and inserted into the fixed platform, and a first gear is fixedly sleeved at the middle of the intermediate rod, and a first motor is installed at a position near the middle of the lower inner wall of the fixed platform, and a second gear is fixedly sleeved on one end of the output shaft of the first motor, and the second gear is meshed with the first gear;

[0008] The pushing structure includes a fixed column connected to the top of one side of two movable plates close to each other, a turntable is provided at one end of the fixed column through a driving structure, a support column is fixedly connected to the end of the turntable away from the fixed column, the support column, the turntable and the fixed column are all cylindrical, the outer diameter of the turntable is 1.1 times the inner diameter of the steel pipe, the outer diameter of the steel pipe is 1.1 times the outer diameter of the turntable, the outer diameter of the turntable is the same as the outer diameter of the fixed column, and the outer diameter of the support column is the same as the inner diameter of the steel pipe;

[0009] A collecting frame is installed between the inner walls on both sides of the fixing platform. The collecting frame is arranged above the middle rod. A material guiding structure is arranged at a position on the fixing platform close to the collecting frame.

[0010] Preferably, the shielding welding structure includes a shielding cover fastened to the middle of the top of the fixed platform by bolts, and feed ports are opened on both side surfaces of the shielding cover, and the feed ports are cylindrical ports. The axial position of the feed ports and the axial position of the fixed column are on the same horizontal line, and an electric telescopic rod is installed in the middle of the top of the shielding cover, and a welding head is installed on the bottom end of the output shaft of the electric telescopic rod inserted into the shielding cover, and a pushing structure is provided in the two feed ports.

[0011] Preferably, the driving structure includes an inner groove opened in the fixed column near one end of the turntable, a second motor is installed on the groove wall at one end of the inner groove away from the supporting column, and one end of the output shaft of the second motor is connected to the turntable.

[0012] Preferably, the storage structure includes a loading seat installed on the fixed table near the middle, a storage frame is connected to the rear side of the loading seat, a shielding edge is provided at the upper edge of the storage frame, the bottom of the storage frame near the loading seat is a horizontal plane, and the bottom of the storage frame away from the loading seat is an inclined surface.

[0013] Preferably, a partition is installed at a position near the top of the inner wall of the collection frame, a material discharge chute is opened on the front of the collection frame below the partition, and doors are hingedly installed at two positions above and below the partition on the rear side of the collection frame.

[0014] Preferably, the material guiding structure includes two groups of fixed rods connected to the front side of the fixed table at both sides of the collecting frame, and each group of two fixed rods is connected with a connecting strip on one end away from the fixed table, and each group of two fixed rods is movably provided with a side plate, and a material guiding frame is connected between the two side plates, and the bottom end of the material guiding frame is inserted into the material discharge chute, and a material guiding plate is connected to the upper position of the rear side of the material guiding frame, and the material guiding plate is inclined on the material guiding frame, and the material guiding plate extends to the position directly below the shielding cover, and a shielding edge is provided at the upper edge of the material guiding plate, and a driving structure is provided between the side plate and the movable plate.

[0015] Preferably, the driving structure includes horizontal plates respectively connected to the middle of the side surfaces of the two side plates away from each other, and a second guide groove is opened on the horizontal plate. The part of the second guide groove close to the material introduction frame is in a "Z" shape, and the remaining part of the second guide groove is horizontal. A U-shaped rod is movable through the end of the second guide groove away from the side plate, and both ends of the U-shaped rod are connected to the corresponding movable plate.

[0016] Preferably, the ejection structure includes a top groove opened on the upper inner wall of the feed port, a U-shaped bar movably passing through the top groove, the bottom end of the U-shaped bar inserted into the feed port is connected to an extrusion block, the extrusion block is in the shape of a semi-disc, a spring is connected between the middle of the upper inner wall of the U-shaped bar and the lower groove wall of the top groove, the other bottom end of the U-shaped bar inserted into the shielding cover is connected to a ejection bar, and the ejection bar is in an arc shape.

[0017] In summary, the present invention includes the following beneficial technical effects:

[0018] 1. The present invention is provided with two sets of moving structures, a storage structure and a pushing structure, and a collecting frame is provided at the lower position in the middle of the fixed platform. The two steel pipes on the two storage structures can be automatically pushed and loaded through the moving structure and the pushing structure, and the two steel pipes pushed close to each other are pressed together for welding. When the two sets of pushing structures are pulled apart after welding, the welded steel pipes can be directly dropped into the collecting frame for unloading under the gravity of the welded steel pipes themselves, which saves time and effort in operation and has lower manufacturing cost.

[0019] 2. The present invention provides a shielding welding structure on the fixed platform, which can shield the debris generated during welding and improve the quality of the working environment. In addition, a partition is provided in the collection frame, and a material guiding structure is provided on the fixed platform. A driving structure is provided between the side plate on the material guiding structure and the movable plate on the movable structure, so that when the pushing structure on the movable structure pushes the steel pipe for welding, it can automatically drive the material guiding plate on the material guiding structure to move downward away from the shielding cover. In this way, the debris generated during the welding process can directly fall onto the partition in the collection frame for collection. In the process of the movable structure driving the pushing structure to be pulled out from the welded steel pipe, it will automatically drive the material guiding plate on the material guiding structure to move to the bottom of the steel pipe. When the support column on the pushing structure is completely pulled out from the steel pipe, the steel pipe can be loaded and unloaded from the material guiding structure to the collection space below the partition in the collection frame, thereby realizing the function of classified collection of debris and steel pipes.

[0020] 3. The present invention provides a push-out structure in the feed port of the shielding cover. By utilizing the push-out structure, during the process of the push-out structure being pulled out from the welded steel pipe, the push-out bar on the push-out structure can be closely attached to the end of the steel pipe, so that the steel pipe can be smoothly pulled out from the push-out structure for automatic unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a welding device for a steel pipe in an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of the structure of the fixed platform in an embodiment of the present invention;

[0023] Figure 3 Schematic diagram of the structure of the shielding cover in the embodiment of the present invention

[0024] Figure 4 is a schematic diagram of the structure inside the shielding cover in an embodiment of the present invention;

[0025] Figure 5 In the embodiment of the present invention Figure 4 A magnified view of the structure at A;

[0026] Figure 6 is a schematic structural diagram of a storage structure in an embodiment of the present invention;

[0027] Figure 7 is a schematic diagram of the structure of the collection frame in an embodiment of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the material pushing structure in an embodiment of the present invention.

[0029] Explanation of the reference numerals: 1. fixed platform; 2. bracket; 3. first guide groove; 4. guide rod; 5. movable plate; 6. screw; 7. intermediate rod; 8. first gear; 9. first motor; 10. second gear; 11. fixed column; 12. support column; 13. collection frame; 14. shielding cover; 15. feed inlet; 16. electric telescopic rod; 17. welding head; 18. second motor; 19. turntable; 20. inner groove; 21. steel pipe; 22. loading seat; 23. storage frame; 24. partition; 25. unloading trough; 26. fixed rod; 27. connecting strip; 28. side plate; 29. ​​feed frame; 30. feed plate; 31. cross plate; 32. second guide groove; 33. U-shaped rod; 34. top groove; 35. U-shaped strip; 36. extrusion block; 37. spring; 38. ejection strip. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-Figure 8 The present invention is described in further detail.

[0031] Reference Figure 1-Figure 8The embodiment of the present invention discloses a welding device for steel pipes, including a fixed platform 1 and a bracket 2, the brackets 2 are welded at both ends of the bottom of the fixed platform 1, the movable structures are arranged at both sides of the top of the fixed platform 1, a shielding welding structure is arranged in the middle of the top of the fixed platform 1, and storage structures are arranged on both sides of the top of the fixed platform 1 near the middle, and a plurality of steel pipes 21 are stored in the storage structure;

[0032] The moving structure includes a first guide groove 3 opened on both sides of the fixed platform 1, a guide rod 4 is connected between the groove walls at both ends of each first guide groove 3, a moving plate 5 is movably sleeved on each guide rod 4, and a pushing structure is arranged on the moving plate 5, and the front and rear sides of the moving plate 5 are respectively attached to the front and rear inner walls of the first guide groove 3, and screws 6 are respectively rotated through the thread grooves at the bottom ends of the two moving plates 5, and the threads on the two screws 6 are in opposite directions. An intermediate rod 7 is connected between the ends of the two screws 6 that are rotated and inserted into the fixed platform 1, and a first gear 8 is fixedly sleeved in the middle of the intermediate rod 7. The lower inner wall of the fixed platform 1 A first motor 9 is installed near the middle position, and a second gear 10 is fixedly sleeved on one end of the output shaft of the first motor 9, and the second gear 10 is meshedly connected with the first gear 8; the pushing structure includes a fixed column 11 connected to the top of one side of the two moving plates 5 close to each other, and a turntable 19 is provided at one end of the fixed column 11 through a driving structure, and a support column 12 is fixedly connected to the end of the turntable 19 away from the fixed column 11, and the support column 12, the turntable 19 and the fixed column 11 are all cylindrical, and the outer diameter of the turntable 19 is 1.1 times the inner diameter of the steel pipe 21, and the outer diameter of the steel pipe 21 is 1.1 times, the outer diameter of the turntable 19 is the same as the outer diameter of the fixed column 11, and the outer diameter of the support column 12 is the same as the inner diameter of the steel pipe 21; a collecting frame 13 is installed between the inner walls on both sides of the fixed platform 1, and the collecting frame 13 is arranged at the upper position of the intermediate rod 7, and a material introduction structure is arranged at a position close to the collecting frame 13 on the fixed platform 1; the pushing structure includes a top groove 34 opened on the inner wall of the feed port 15, a U-shaped bar 35 is movable through the top groove 34, and an extrusion block 36 is connected to the bottom end of the U-shaped bar 35 inserted into the feed port 15, and the extrusion block 36 is in the shape of a semicircular disk, and the middle of the upper inner wall of the U-shaped bar 35 and the top groove 34 are connected. A spring 37 is connected between the lower groove walls, and a push-out strip 38 is connected to the other bottom end of the U-shaped strip 35 inserted into the shielding cover 14. The push-out strip 38 is in an arc shape. When welding between the steel pipes 21, the first motor 9 on the fixed platform 1 is first started, and the middle rod 7 and the two screw rods 6 are driven to rotate through the first gear 8 and the second gear 10. The two movable plates 5 synchronously drive the fixed column 11 on the two rotating screw rods 6 to move toward each other. When the support column 12 at one end of the fixed column 11 is inserted into the steel pipe 21, as the movable plate 5 continues to move, it drives the turntable 19 to be close to one end surface of the steel pipe 21. The turntable 19 pushes the steel pipe 21 from the feed port 15 into the shielding cover 14. The support column 12 supports the steel pipe 21 to prevent the steel pipe 21 from falling during the feeding process. When the steel pipe 21 moves in the feed port 15, one end of the steel pipe 21 first contacts the extrusion block 36. As the steel pipe 21 continues to move, the extrusion block 36 is squeezed upward, pushing the U-shaped bar 35 to drive the push-out bar 38 to move upward in the top groove 34, stretching the spring 37, so that the steel pipe 21 can move smoothly into the shielding cover 14. When the ends of the two steel pipes 21 close to each other are pressed together, the extrusion block 36 is pushed out of the steel pipe 21. The tube 21 moves to the fixed column 11, and the spring 37 uses the pulling force of the U-shaped bar 35 to pull the push-out bar 38 down to the turntable 19, and then the welding work is carried out. After the steel tube 21 is welded, the first motor 9 drives the screw 6 to rotate in the opposite direction, and the two moving plates 5 drive the support column 12 to move in the opposite direction and reset. During the movement of the support column 12, the push-out bar 38 blocks the end of the steel tube 21, so that when the support column 12 is completely removed from the welded steel tube, the welded steel tube 21 loses support and can fall into the collection frame 13 under the gravity of the steel tube 21 itself, and is automatically unloaded and collected.

[0033] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 8The shielding welding structure includes a shielding cover 14 fastened to the middle of the fixed platform 1 by bolts, and a feed port 15 is provided on both sides of the shielding cover 14. The feed port 15 is a cylindrical port, and the axial position of the feed port 15 is on the same horizontal line as the axial position of the fixed column 11. An electric telescopic rod 16 is installed in the middle of the upper part of the shielding cover 14, and a welding head 17 is installed on the bottom end of the output shaft of the electric telescopic rod 16 inserted into the shielding cover 14. A pushing structure is provided in the two feed ports 15. During welding, the electric telescopic rod 16 is started to drive the welding head 17 to move down to the welding position of the steel pipe 21 to perform welding work; the driving structure includes an inner groove 20 opened in the fixed column 11 near one end of the turntable 19, and a second motor 18 is installed on the groove wall of the end of the inner groove 20 away from the support column 12. One end of the output shaft of the second motor 18 is connected to the turntable 19. During the welding process, since the turntable 19 is pressed against the steel pipe On one end surface of 21, the second motor 18 can be started to drive the turntable 19 to rotate. The static friction generated between the turntable 19 and the end surface of the steel pipe 21 can be used to drive the steel pipe 21 to rotate at the same time, so that the welding head 17 can weld the steel pipe 21 more thoroughly, thereby improving the quality of welding work; the storage structure includes a loading seat 22 installed on the fixed table 1 near the middle, and a storage frame 23 is connected to the rear side of the loading seat 22. A shielding edge is provided at the upper edge of the storage frame 23. The position below the storage frame 23 near the loading seat 22 is a horizontal plane, and the position below the storage frame 23 away from the loading seat 22 is an inclined plane. The storage frame 23 can be used directly to store multiple steel pipes 21 to be welded. Since the storage frame 23 is provided with an inclined surface, the extrusion generated between the steel pipes 21 stored in the storage frame 23 can be used to push the steel pipes 21 stored in the storage frame 23 to the loading seat 22 in sequence for loading work.

[0034] See also Figure 1 , Figure 2 and Figure 7 A partition 24 is installed at the upper position of the inner wall of the collection frame 13, a material discharge chute 25 is opened at the lower position of the partition 24 on the front of the collection frame 13, and doors are hingedly installed at the upper and lower positions of the partition 24 on the rear side of the collection frame 13. The partition 24 can divide the interior of the collection frame 13 into two collection spaces to classify and collect the debris generated during the welding process and the steel pipe 21 after welding;

[0035] The material guiding structure includes two groups of fixed rods 26 connected to the front of the fixed platform 1 at both sides of the collecting frame 13, and each group of two fixed rods 26 is connected to a connecting strip 27 on one end away from the fixed platform 1, and each group of two fixed rods 26 is movably sleeved with a side plate 28, and a guiding frame 29 is connected between the two side plates 28, and the bottom end of the guiding frame 29 is inserted into the unloading chute 25, and a guiding plate 30 is connected to the upper position of the rear side of the guiding frame 29, and the guiding plate 30 is inclined on the guiding frame 29, and the guiding plate 30 extends to the position directly below the shielding cover 14, and a shielding edge is provided at the upper edge of the guiding plate 30, and a driving structure is provided between the side plate 28 and the movable plate 5;

[0036] The driving structure includes a transverse plate 31 respectively connected to the middle of the side surfaces of the two side plates 28 away from each other, a second guide groove 32 is opened on the transverse plate 31, the portion of the second guide groove 32 close to the feed frame 29 is in a "Z" shape, and the remaining portion of the second guide groove 32 is horizontal, a U-shaped rod 33 is movably passed through the end of the second guide groove 32 away from the side plate 28, and both ends of the U-shaped rod 33 are connected to the corresponding movable plate 5. In the process of driving the steel pipe 21 on the support column 12 to move into the shielding cover 14 for welding, the movable plate 5 drives the U-shaped rod 33 to move toward one side of the shielding cover 14 in the second guide groove 32, and the U-shaped rod 33 squeezes the groove wall of the second guide groove 32. The guide plate 30 can be moved out from above the collecting frame 13, so that the debris generated during the welding process can be collected on the partition 24 in the collecting frame 13 in cooperation with the shielding effect of the shielding cover 14 on the debris. During the reverse movement of the movable plate 5, the reverse sliding of the U-shaped rod 33 in the second guide groove 32 can drive the guide plate 30 to move in the opposite direction to the position directly below the steel pipe 21 after welding, so that when the support column 12 is completely pulled out of the steel pipe 21, the steel pipe 21 can fall onto the guide plate 30, and enter the collection space below the partition 24 in the collecting frame 13 through the guide plate 30, the guide frame 29 and the discharge chute 25 to realize the classification and collection function.

[0037] The implementation principle of a welding device for steel pipes in an embodiment of the present invention is as follows: first, multiple steel pipes 21 to be welded are placed on two storage frames 23 respectively. Since the storage frames 23 are provided with inclined surfaces, the steel pipes 21 stored on the storage frames 23 are squeezed. The generated squeezing force is used to push the stored steel pipes 21 onto the loading seat 22 in sequence. Then, the first motor 9 on the fixed platform 1 is started, and the middle rod 7 and the two screw rods 6 are driven to rotate as a whole through the first gear 8 and the second gear 10. The two movable plates 5 are synchronously moved toward the direction of the shielding cover 14 on the guide rod 4 in the first guide groove 3. The movement of the movable plate 5 first drives the support column 12 to move and insert into the steel pipe 21, and as the movable plate 5 continues to move, it drives the rotating The disk 19 moves to the end surface of the steel pipe 21 to push the steel pipe 21 from the loading seat 22 and the feed port 15 to the shielding cover 14. The support column 12 supports the steel pipe 21 to prevent the steel pipe 21 from falling during the moving and loading process. In this process, the movement of the movable plate 5 drives the U-shaped rod 33 to slide in the second guide groove 32 of the cross plate 31. The U-shaped rod 33 squeezes the second guide groove 32 to push the guide plate 30 and the guide frame 29 to move on the fixed rod 26 until the guide plate 30 moves out from the top of the collection frame 13. When the steel pipe 21 moves in the feed port 15, the end surface of the steel pipe 21 away from the turntable 19 is squeezed onto the extrusion block 36, pushing the U-shaped bar 35 to move up in the top groove 34, stretching the spring 37, and brings up the push-out strip 38. At the same time, after the turntable 19 pushes out the steel pipe 21 on the loading seat 22, the fixed column 11 moves on the loading seat 22 to block the remaining steel pipe 21 in the storage frame 23. When the steel pipe 21 is completely moved into the shielding cover 14, the ends of the two steel pipes 21 close to each other are pressed together, and the fixed column 11 moves to the bottom of the extrusion block 36. The pulling force of the spring 37 on the U-shaped strip 35 can be used to pull the push-out strip 38 down to the turntable 19, and the push-out strip 38 is pressed against one end surface of the steel pipe 21. Then the electric telescopic rod 16 can be started to drive the welding head 17 to move down to the position to be welded between the two steel pipes 21, and the welding head 17 is started to weld between the two steel pipes 21. During the welding process, the inner The second motor 18 in the groove 20 drives the turntable 19 to rotate. Since the turntable 19 is pressed against the end surface of the steel pipe 21, the steel pipe 21 can be driven to rotate, so that the welding of the steel pipe 21 is more thorough. During the welding process, the shielding cover 14 shields the debris during the welding process, so that the debris can fall onto the partition 24 in the collection frame 13 for collection. After the steel pipe 21 is welded, the first motor 9 drives the screw 6 to rotate in the opposite direction, and the two movable plates 5 drive the fixed column 11 and the support column 12 as a whole to move synchronously in opposite directions on the fixed platform 1, and drive the guide plate 30 to move to the lower position of the welded steel pipe 21, and then cooperate with the push-out strip 38 to shield one end of the welded steel pipe 21, so that when the support column 12 is completely pulled out of the steel pipe 21,The welded steel pipes 21 can fall onto the guide plate 30, and are fed from the guide frame 29 to the collection space below the partition 24 in the collection frame 13, realizing the classification and collection function. Finally, when the support column 12 is completely removed from the loading seat 22, the steel pipes 21 on the storage frame 23 are squeezed by each other, and the bottom steel pipe 21 can be automatically moved down to the loading seat 22, and the next group of steel pipes 21 can continue to be fed and welded. The operation is more labor-saving and convenient, and the manufacturing cost of the equipment is lower.

[0038] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding device for a steel pipe, comprising a fixing table (1) and a bracket (2), characterized in that: Brackets (2) are welded at both ends of the bottom of the fixed platform (1), movable structures are arranged on both sides of the top of the fixed platform (1), a shielding welding structure is arranged in the middle of the top of the fixed platform (1), and storage structures are arranged on both sides of the top of the fixed platform (1) near the middle, wherein a plurality of steel pipes (21) are stored in the storage structures; The movable structure comprises first guide grooves (3) provided on both sides of the fixed platform (1), guide rods (4) being connected between the groove walls at both ends of each of the first guide grooves (3), a movable plate (5) being movably sleeved on each of the guide rods (4), a material pushing structure being provided on the movable plate (5), front and rear side surfaces of the movable plate (5) being respectively fitted on the front and rear inner walls of the first guide groove (3), screw rods (6) being respectively rotatably passed through the thread grooves at the bottom ends of the two movable plates (5), an intermediate rod (7) being connected between the ends of the two screw rods (6) being rotatably inserted into the fixed platform (1), a first gear (8) being fixedly sleeved on the middle of the intermediate rod (7), a first motor (9) being installed near the middle of the lower inner wall of the fixed platform (1), a second gear (10) being fixedly sleeved on one end of the output shaft of the first motor (9), the second gear (10) being meshingly connected with the first gear (8); The pushing structure comprises a fixed column (11) connected to the top of one side surface of two movable plates (5) close to each other, a turntable (19) is provided at one end of the fixed column (11) through a driving structure, and a support column (12) is fixedly connected to the end of the turntable (19) away from the fixed column (11), the support column (12), the turntable (19) and the fixed column (11) are all cylindrical in shape, the outer diameter of the turntable (19) is 1.1 times the inner diameter of the steel pipe (21), the outer diameter of the steel pipe (21) is 1.1 times the outer diameter of the turntable (19), the outer diameter of the turntable (19) is the same as the outer diameter of the fixed column (11), and the outer diameter of the support column (12) is the same as the inner diameter of the steel pipe (21); A collecting frame (13) is installed between the inner walls on both sides of the fixed platform (1), the collecting frame (13) is arranged above the middle rod (7), and a material guiding structure is arranged at a position close to the collecting frame (13) on the fixed platform (1); The shielding welding structure comprises a shielding cover (14) fastened to the middle of the upper part of the fixing platform (1) by bolts, and a feed port (15) is provided on both side surfaces of the shielding cover (14), and the feed port (15) is a cylindrical port, and the axis position of the feed port (15) is on the same horizontal line as the axis position of the fixing column (11), and an electric telescopic rod (16) is installed in the middle of the upper part of the shielding cover (14), and a welding head (17) is installed on the bottom end of the output shaft of the electric telescopic rod (16) inserted into the shielding cover (14), and a push-out structure is provided in both the feed ports (15); The ejection structure comprises a top groove (34) formed on the upper inner wall of the feed port (15), a U-shaped bar (35) movably passing through the top groove (34), an extrusion block (36) being connected to the bottom end of the U-shaped bar (35) inserted into the feed port (15), the extrusion block (36) being in the shape of a semi-disc, a spring (37) being connected between the middle of the upper inner wall of the U-shaped bar (35) and the lower groove wall of the top groove (34), and an ejection bar (38) being connected to the other bottom end of the U-shaped bar (35) inserted into the shielding cover (14), the ejection bar (38) being in the shape of an arc.

2. A welding device for steel pipes according to claim 1, characterized in that: The driving structure comprises an inner groove (20) formed in the fixed column (11) at one end close to the rotating disk (19); a second motor (18) is mounted on a groove wall at one end of the inner groove (20) away from the supporting column (12); and one end of an output shaft of the second motor (18) is connected to the rotating disk (19).

3. A welding device for steel pipes according to claim 1, characterized in that: The storage structure comprises a loading seat (22) mounted on the fixed platform (1) near the middle, a storage frame (23) connected to the rear side of the loading seat (22), a shielding edge provided at the upper edge of the storage frame (23), a horizontal surface at a position close to the loading seat (22) at the bottom of the storage frame (23), and an inclined surface at a position away from the loading seat (22) at the bottom of the storage frame (23).

4. A welding device for steel pipes according to claim 1, characterized in that: A partition plate (24) is installed at a position near the top of the inner wall of the collection frame (13), a material discharge chute (25) is provided on the front of the collection frame (13) below the partition plate (24), and doors are hingedly installed at two positions above and below the partition plate (24) on the rear side of the collection frame (13).

5. The welding equipment for steel pipe according to claim 1, characterized in that: The material guiding structure comprises two groups of fixed rods (26) connected to the front of the fixed platform (1) at both sides of the collecting frame (13), each group of two fixed rods (26) being connected to a connecting strip (27) at one end away from the fixed platform (1), each group of two fixed rods (26) being movably sleeved with a side plate (28), a material guiding frame (29) being connected between the two side plates (28), the bottom end of the material guiding frame (29) being inserted into the material discharge chute (25), a material guiding plate (30) being connected to the upper position of the rear side surface of the material guiding frame (29), the material guiding plate (30) being arranged on the material guiding frame (29) in an inclined manner, the material guiding plate (30) extending to a position directly below the shielding cover (14), a shielding edge being arranged at the upper edge of the material guiding plate (30), and a driving structure being arranged between the side plate (28) and the movable plate (5).

6. A welding device for steel pipes according to claim 5, characterized in that: The driving structure comprises a transverse plate (31) respectively connected to the middle of the side surfaces of the two side plates (28) away from each other, the transverse plate (31) is provided with a second guide groove (32), the portion of the second guide groove (32) close to the material guide frame (29) is in a "Z" shape, and the remaining portion of the second guide groove (32) is in a horizontal shape, and a U-shaped rod (33) is movably passed through the end of the second guide groove (32) away from the side plate (28), and the two ends of the U-shaped rod (33) are connected to the corresponding movable plate (5).

Images