Intelligent welding equipment for steel structure and using method of intelligent welding equipment

Abstract

The invention discloses intelligent welding equipment for a steel structure and a using method of the intelligent welding equipment, and relates to the technical field of welding equipment. The intelligent welding equipment comprises a welding base, an inverted-T-shaped bearing seat is fixedly mounted at the top end of the welding base, steel pipe supporting assemblies are fixedly mounted on the two sides of the top end of the inverted-T-shaped bearing seat, and a steel pipe clamping assembly is fixedly mounted in the middle of the top end of the inverted-T-shaped bearing seat; the using method comprises the following steps that S1, a small-diameter steel pipe is clamped; s2, clamping a large-diameter steel pipe; and S3, steel pipe welding. Small-diameter steel pipes are clamped through the steel pipe clamping assembly, the angle of the small-diameter steel pipes relative to large-diameter steel pipes and the distance between the small-diameter steel pipes can be rapidly and freely adjusted according to actual welding requirements, the large-diameter steel pipes and the small-diameter steel pipes can be rapidly arranged before welding, the welding requirements are met, and the welding efficiency is improved. And the positions of the two parts do not need to be adjusted in the welding process, and continuous welding work is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and particularly relates to an intelligent welding equipment for steel structures and its usage method. Background Art

[0002] A steel structure is a structure composed of steel materials, and a height limit frame is one of them. The height limit frame is usually composed of multiple steel pipes welded together, including support steel pipes on both sides and a steel pipe crossbeam at the top. Generally, the steel pipe crossbeam usually includes two large-diameter steel pipes and multiple small-diameter steel pipes, and the small-diameter steel pipes are welded between the two large-diameter steel pipes.

[0003] After retrieval, a patent with the Chinese patent application number 202410039075.4 discloses an intelligent welding equipment for steel structures, which includes a discharge box; a number of height limit frames are provided; a discharge box is arranged on the right side of the number of height limit frames; a number of rollers are arranged under the discharge box; a first steel pipe is transported on the discharge box; a second steel pipe is transported on the discharge box; it also includes a bearing assembly, a limiting assembly, a limiting cylinder, a limiting block, a welding assembly, a contact block and an adjustment system; a bearing assembly is arranged on the number of height limit frames; a limiting assembly is installed on the bearing assembly; a limiting cylinder for preventing the first steel pipe from shifting is arranged on the limiting assembly; a limiting block for preventing the second steel pipe from shifting is installed on the limiting assembly; a welding assembly is arranged on the bearing assembly; a contact block is arranged on the welding assembly; an inclined groove is opened on the left side of the first steel pipe; a groove is opened on the second steel pipe; an adjustment system for adjusting the deviation angle of the first steel pipe is arranged on the limiting assembly.

[0004] In the actual use process of the existing device, it is not convenient to adjust the steel pipes. After the large-diameter steel pipe and the small-diameter steel pipe are welded, their positions will be relatively fixed. In general welding processes, multi-point welding is usually adopted to fix the positions between them, and then sequential welding is carried out between the welding points to perform all-round welding on the connection gap between them. After spot welding, it is not convenient to adjust the positions. During the actual welding process, it is often necessary to adjust the steel pipes. Such operations have a certain impact on the welding work. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose an intelligent welding equipment for steel structures and its usage method.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An intelligent welding equipment for steel structures, comprising:

[0008] The welding base has an inverted T-shaped bearing seat fixedly installed at its top. On both sides of the top of the inverted T-shaped bearing seat, steel pipe support components are fixedly installed, and in the middle of the top of the inverted T-shaped bearing seat, a steel pipe clamping component is fixedly installed; a large-diameter steel pipe is arranged at the top of the steel pipe support component, and multiple small-diameter steel pipes are clamped at the top of the steel pipe clamping component;

[0009] The intelligent welding robot has a welding head fixedly installed at its top for welding the connection between the large-diameter steel pipe and the small-diameter steel pipe. A robot track groove is opened at the top of the welding base, and the intelligent welding robot moves along the robot track groove;

[0010] The main body of the steel pipe support component is a support groove body. Inside the support groove body, multiple lifting hydraulic cylinders are arranged, and a steel pipe clamping frame is fixedly installed at the top of the telescopic end of the lifting hydraulic cylinder;

[0011] The main body of the steel pipe clamping component is a clamping groove body. Inside the clamping groove body, multiple bearing connecting plates are arranged. At the top of the bearing connecting plate, a clamping connecting plate is arranged. At both ends of the upper surface of the clamping connecting plate, end limiting plates are welded. On both sides of the top between the two end limiting plates, steel pipe clamping arm plates are rotatably installed, and the two steel pipe clamping arm plates are symmetrically arranged.

[0012] As a preferred embodiment of the present invention: A fixed connection seat is fixedly installed in the middle of the upper surface of the clamping connecting plate. Inside the fixed connection seat, a bidirectional threaded rod is rotatably installed, and the axis of the bidirectional threaded rod is perpendicular to the deflection axis of the steel pipe clamping arm plate.

[0013] On the basis of the foregoing solution: Threaded translation sliders are sleeved at both ends of the bidirectional threaded rod. The top of the translation slider is rotatably connected to a clamping support arm plate, and the top of the clamping support arm plate is rotatably connected to the adjacent steel pipe clamping arm plate.

[0014] As a preferred embodiment of the present invention: A T-shaped frame plate is fixedly connected to the lower surface of the bearing connecting plate. At both ends of the lower surface of the T-shaped frame plate, limit side plates are fixedly connected. Between the two limit side plates, multiple moving rollers are rotatably installed at equal intervals.

[0015] On the basis of the foregoing solution: An internally threaded sleeve is fixedly connected to one side of the limit side plate. Inside the internally threaded sleeve, a connecting threaded rod is fixedly installed, and a fixed backing plate is sleeved at the end of the connecting threaded rod.

[0016] On the basis of the foregoing solution: Threaded rod adaptation sliding grooves are opened on the front and back sides of the clamping groove body. The connecting threaded rod passes through the threaded rod adaptation sliding groove and is threadedly installed with an extrusion nut for extruding the fixed backing plate.

[0017] As a preferred embodiment of the present invention: a positioning sleeve is fixedly connected to the top end of the bearing connection plate, a rotation connection block fixedly connected to the lower surface of the clamping connection plate is rotatably installed at the top of the inner cavity of the positioning sleeve, and a plurality of locking bolts are equidistantly installed on the outer wall of the positioning sleeve in a threaded manner.

[0018] As a preferred embodiment of the present invention: support installation grooves are formed at both ends of the upper surface of the inverted T-shaped bearing seat, and a plurality of groove body support rollers are rotatably installed at equal intervals inside the support installation grooves; a group of stable transverse movement hydraulic cylinders are fixedly installed on the front and back surfaces of the inverted T-shaped bearing seat, and the telescopic ends of the stable transverse movement hydraulic cylinders are fixedly connected to the support groove body.

[0019] As a preferred embodiment of the present invention: seat tube support rollers are rotatably installed at equal intervals on the inner wall of the bottom end of the clamping groove body, an installation seat tube is arranged at the top end of the seat tube support roller, and the lifting hydraulic cylinder is fixedly installed inside the installation seat tube.

[0020] A method for using an intelligent welding device for steel structures includes the following steps:

[0021] S1: Clamping small-diameter steel pipes; placing multiple small-diameter steel pipes between multiple pairs of steel pipe clamping arm plates respectively, then rotating the corresponding bidirectional threaded rod clockwise to make the two translation sliders approach each other, and then driving the two steel pipe clamping arm plates to deflect synchronously and reversely through the clamping support arm plates to clamp the small-diameter steel pipes;

[0022] S2: Clamping large-diameter steel pipes; placing two large-diameter steel pipes on the top ends of the corresponding steel pipe holders of the two support groove bodies respectively, then starting the lifting hydraulic cylinder to lift the height of the large-diameter steel pipes so that the axes of the large-diameter steel pipes and the axes of the small-diameter steel pipes are in the same plane, and then controlling the two support groove bodies to approach each other through the stable transverse movement hydraulic cylinders to clamp the multiple small-diameter steel pipes with the two large-diameter steel pipes;

[0023] S3: Welding of steel pipes; starting the intelligent welding robot, the intelligent welding robot moves along the robot track groove, stops moving at the positions corresponding to the joints of each small-diameter steel pipe and the large-diameter steel pipe, welds the joints of the small-diameter steel pipe and the large-diameter steel pipe, and after completing the welding, continues to move to weld the joints of other small-diameter steel pipes and large-diameter steel pipes.

[0024] The beneficial effects of the present invention are:

[0025] 1. An intelligent welding device for steel structures can clamp small-diameter steel pipes through a steel pipe clamping component. According to actual welding requirements, it can quickly and freely adjust the angle of the small-diameter steel pipe relative to the large-diameter steel pipe and the spacing of the small-diameter steel pipe. Before welding, the large-diameter steel pipe and the small-diameter steel pipe can be quickly arranged, meeting the welding requirements, without the need to adjust their positions during the welding process, ensuring the continuous progress of the welding work and improving the welding efficiency.

[0026] 2. An intelligent welding device for steel structures can quickly arrange the steel pipe crossbeam through a steel pipe support component and a steel pipe clamping component, enabling the large-diameter steel pipe and the small-diameter steel pipe to quickly adjust their positions. At the same time, they can clamp steel pipes of various diameters, fully meeting the welding requirements of various overhead gantries. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic three-dimensional structure diagram of the overall assembly of the present invention;

[0028] Figure 2 is a schematic partial cross-sectional structure diagram of the overall assembly of the present invention;

[0029] Figure 3 is of the present invention Figure 2 an enlarged structure diagram of part A in;

[0030] Figure 4 is of the present invention Figure 2 an enlarged structure diagram of part B in;

[0031] Figure 5 is of the present invention Figure 2 an enlarged structure diagram of part C in;

[0032] Figure 6 is of the present invention Figure 2 an enlarged structure diagram of part D in.

[0033] In the figure: 1, welding base; 2, robot track groove; 3, intelligent welding robot; 4, welding head; 5, inverted T-shaped bearing seat; 6, support trough body; 7, mounting seat cylinder; 8, lifting hydraulic cylinder; 9, steel pipe clamp; 10, clamping trough body; 11, large-diameter steel pipe; 12, small-diameter steel pipe; 13, support mounting groove; 14, trough body support roller; 15, seat cylinder support roller; 16, stable transverse movement hydraulic cylinder; 17, connecting clamping cylinder; 18, bearing connecting plate; 19, T-shaped frame plate; 20, limiting side plate; 21, moving roller; 22, positioning sleeve; 23, rotating connecting block; 24, clamping connecting plate; 25, fixed connecting seat; 26, bidirectional threaded rod; 27, translation slider; 28, rotating seat one; 29, clamping support arm plate; 30, rotating seat two; 31, end limiting plate; 32, steel pipe clamping arm plate; 33, end connecting plate; 34, guiding slide bar; 35, locking bolt; 36, internal thread sleeve; 37, connecting threaded rod; 38, fixed backing plate; 39, extrusion nut; 40, threaded rod adapter chute. Detailed implementation mode

[0034] The technical solution of the present invention will be further described in detail below in conjunction with the specific implementation mode.

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0036] Embodiment 1:

[0037] An intelligent welding device for steel structures, as Figures 1 to 6 shown, includes: a welding base 1 and an intelligent welding robot 3. An inverted T-shaped bearing seat 5 is fixedly installed at the top of the welding base 1. Steel pipe support assemblies are fixedly installed on both sides of the top of the inverted T-shaped bearing seat 5, and a steel pipe clamping assembly is fixedly installed in the middle of the top of the inverted T-shaped bearing seat 5.

[0038] A large-diameter steel pipe 11 is arranged at the top of the steel pipe support assembly, and multiple small-diameter steel pipes 12 are clamped at the top of the steel pipe clamping assembly. The large-diameter steel pipe 11 and the multiple small-diameter steel pipes 12 are welded to form a steel pipe crossbeam at the top of the overhead guard.

[0039] A welding head 4 for welding the connection between the large-diameter steel pipe 11 and the small-diameter steel pipe 12 is fixedly installed at the top of the intelligent welding robot 3. A robot track groove 2 is opened at the top of the welding base 1, and the intelligent welding robot 3 moves along the robot track groove 2 to sequentially weld the connection between the large-diameter steel pipe 11 and the small-diameter steel pipe 12.

[0040] The intelligent welding robot 3 and the welding head 4 both belong to the prior art and can be purchased on the market according to needs. The present application will not elaborate on their structures, functions, and usage methods.

[0041] The main body of the inverted T-shaped bearing seat 5 is set to be fixedly installed on the seat plate at the top of the welding base 1 through bolts, and a support seat body is welded on the upper surface of the seat plate; and support installation grooves 13 are opened at both ends of the upper surface of the seat plate, and a plurality of groove support rollers 14 are rotatably installed on the inner part of the support installation groove 13 at equal intervals by a first mounting shaft.

[0042] As Figure 3 shown, the groove support roller 14 shown in the attached drawings of the specification of the present application is a long tubular shape. According to actual needs, a long tubular groove support roller 14 can be replaced with a plurality of short tubular groove support rollers 14, and a support seat of the first mounting shaft can be added between two adjacent short tubular groove support rollers 14 to improve the support capacity of the groove support roller 14.

[0043] A set of hydraulic cylinder mounting grooves are opened on both the front and back sides of the support seat body, and a set of stable transverse movement hydraulic cylinders 16 are fixedly installed inside the hydraulic cylinder mounting grooves. Each set of stable transverse movement hydraulic cylinders 16 is equidistantly arranged in a plurality, and the two sets of stable transverse movement hydraulic cylinders 16 are symmetrically arranged; and the two sets of stable transverse movement hydraulic cylinders 16 are linked and synchronously extend and retract with the same extension and retraction length.

[0044] The main body of the steel pipe support assembly is set to be a support groove body 6. The support groove body 6 is arranged at the top of the groove support roller 14, and a plurality of connecting clamping cylinders 17 are welded at equal intervals on one side of the support groove body 6. The connecting clamping cylinders 17 are fixedly sleeved on the end part of the telescopic end of the stable transverse movement hydraulic cylinder 16, and the two support groove bodies 6 move synchronously and in opposite directions on the upper surface of the seat plate.

[0045] A plurality of seat cylinder support rollers 15 are rotatably installed at equal intervals at the bottom of the inner cavity of the support groove body 6 by a second mounting shaft. A plurality of mounting seat cylinders 7 are arranged at the top of the seat cylinder support rollers 15, and the mounting seat cylinders 7 only move horizontally and transversely inside the support groove body 6.

[0046] A lifting hydraulic cylinder 8 is fixedly installed inside the mounting seat cylinder 7, and a steel pipe clamping frame 9 is fixedly installed at the top of the telescopic end of the lifting hydraulic cylinder 8. Referring to Figure 1 , the steel pipe clamping frame 9 is set to be L-shaped and can be adapted to large-diameter steel pipes 11 of various diameters; the steel pipe clamping frames 9 of the two steel pipe support assemblies are symmetrically arranged to limit the large-diameter steel pipe 11 and ensure the clamping stability of the large-diameter steel pipe 11.

[0047] All the lifting hydraulic cylinders 8 of one steel pipe support assembly are linked and synchronously lifted and lowered to ensure the stability of the lifting of the large-diameter steel pipe 11; when the diameters of the two large-diameter steel pipes 11 are the same, the two steel pipe support assemblies are linked, and when the diameters of the two large-diameter steel pipes 11 are different, the two steel pipe support assemblies are controlled separately.

[0048] The main body of the steel pipe clamping assembly is set as a clamping groove body 10, the clamping groove body 10 is fixedly installed at the top of the support seat body, and limit bosses are integrally formed at the tops of the inner walls of the front and back sides of the clamping groove body 10. Above the limit bosses, a plurality of bearing connecting plates 18 are arranged, and positioning sleeves 22 are welded on the upper surfaces of the bearing connecting plates 18.

[0049] At the top of the inner cavity of the positioning sleeve 22, a bearing is fixedly installed. Inside the inner ring of the bearing, a rotating connection block 23 is fixedly installed. And at the bottom of the outer wall of the positioning sleeve 22, a plurality of locking bolts 35 are equidistantly installed by threading. When the end of the locking bolt 35 fits with the rotating connection block 23, the rotating connection block 23 is fixed and cannot rotate.

[0050] At the top of the rotating connection block 23, a clamping connection plate 24 is welded. At both ends of the upper surface of the clamping connection plate 24, end limit plates 31 are welded. Between the two end limit plates 31, two mounting shafts three are rotatably installed at the top. On the outer wall of the mounting shaft three, steel pipe clamping arm plates 32 are rotatably installed. The two steel pipe clamping arm plates 32 are symmetrically arranged; as Figure 6 shown, the upper part of the steel pipe clamping arm plate 32 is set as a 120° bend, which can clamp small-diameter steel pipes 12 with various diameters, ensuring the stability of the small-diameter steel pipes 12 during the welding process.

[0051] In the middle of the upper surface of the clamping connection plate 24, a fixed connection seat 25 is fixedly installed. Inside the fixed connection seat 25, a bidirectional threaded rod 26 is rotatably installed. The axis of the bidirectional threaded rod 26 is perpendicular to the deflection axis (the axis of the mounting shaft three) of the steel pipe clamping arm plate 32.

[0052] Both ends of the bidirectional threaded rod 26 are threadedly sleeved with translation sliders 27. As Figure 5 shown, at the top of the translation slider 27, a rotating seat one 28 is welded. Inside the rotating seat one 28, a clamping support arm plate 29 is rotatably installed. At the top of the clamping support arm plate 29, a rotating seat two 30 is rotatably connected. The rotating seat two 30 is welded to the adjacent steel pipe clamping arm plate 32.

[0053] At both ends of the bidirectional threaded rod 26, a rotating handle and an end connection plate 33 are provided. The rotating handle is far from the fixed connection seat 25 and is fixed to the bidirectional threaded rod 26. The end connection plate 33 is rotatably connected to the bidirectional threaded rod 26. And at both ends between the two end connection plates 33, guide slide rods 34 are fixedly installed. The guide slide rods 34 penetrate through the translation sliders 27 and the fixed connection seat 25, and the guide slide rods 34 are slidably connected to the translation sliders 27 and fixedly connected to the fixed connection seat 25.

[0054] The lower surface of the bearing connecting plate 18 is welded with an inverted T-shaped frame plate 19. Its upper part is set as a vertical plate, and its lower part is set as a horizontal plate. The upper surface of the horizontal plate fits against the bottom end of the limiting boss. And both ends of the lower surface of the T-shaped frame plate 19 are welded with limiting side plates 20. A plurality of moving rollers 21 are rotatably installed at equal intervals at the bottom between the two limiting side plates 20. The outer wall of the bottom end of the moving roller 21 fits against the inner wall of the bottom end of the clamping groove body 10.

[0055] At the top of one side of the two limiting side plates 20 away from each other, an internally threaded sleeve 36 is fixedly connected. A connecting threaded rod 37 is fixedly installed inside the internally threaded sleeve 36. The end of the connecting threaded rod 37 is sleeved with a fixed backing plate 38.

[0056] Threaded rod adaptation chutes 40 are opened on the front and back sides of the clamping groove body 10. The connecting threaded rod 37 passes through the threaded rod adaptation chutes 40 and is threadedly installed with an extrusion nut 39 for extruding the fixed backing plate 38. The fixed backing plate 38 is arranged outside the clamping groove body 10 and fits against the outer wall of the clamping groove body 10. When the extrusion nut 39 is tightened, the T-shaped frame plate 19 and the bearing connecting plate 18 are fixed inside the clamping groove body 10.

[0057] Embodiment 2:

[0058] A usage method of an intelligent welding device for steel structures, used to operate the intelligent welding device for steel structures described in Embodiment 1, includes the following steps:

[0059] S1: Clamp the small-diameter steel pipes 12; place multiple small-diameter steel pipes 12 between multiple pairs of steel pipe clamping arm plates 32 respectively, and then rotate the corresponding bidirectional threaded rod 26 clockwise to make the two translation sliders 27 approach each other along the axis of the bidirectional threaded rod 26. Then drive the two steel pipe clamping arm plates 32 to deflect synchronously and reversely through the clamping support arm plate 29 to clamp the small-diameter steel pipes 12 (note: this is a preliminary clamping, and the small-diameter steel pipes 12 can move along the axis of the mounting shaft three under the action of an external force); then, according to the welding requirements, adjust the distance between two adjacent bearing connecting plates 18. After the adjustment is completed, tighten the extrusion nut 39. The extrusion nut 39 makes the extrusion fixed backing plate 38 fit tightly against the clamping groove body 10, and then fixes the small-diameter steel pipes 12 in the current position; then, according to the welding requirements of the small-diameter steel pipes 12, adjust the deflection angle of the small-diameter steel pipes 12. After the adjustment is completed, tighten the locking bolt 35 to fix the current angle of the small-diameter steel pipes 12;

[0060] S2: Clamp the large-diameter steel pipes 11; Place the two large-diameter steel pipes 11 on the tops of the corresponding steel pipe holders 9 of the two support troughs 6 respectively. Then start the two groups of lifting hydraulic cylinders 8 to raise the height of the large-diameter steel pipes 11 so that the axes of the large-diameter steel pipes 11 and the small-diameter steel pipes 12 are in the same plane. Then control the two support troughs 6 to approach each other on the tops of the two groups of trough support rollers 14 through the stable transverse movement hydraulic cylinder 16, so that the two large-diameter steel pipes 11 clamp multiple small-diameter steel pipes 12. Then completely clamp the small-diameter steel pipes 12 again through the bidirectional threaded rod 26 (refer to S1). Then adjust the two ends of the large-diameter steel pipes 11 so that the layout of the large-diameter steel pipes 11 and the small-diameter steel pipes 12 meets the welding requirements of the steel pipe cross beam;

[0061] S3: Weld the steel pipes; Start the intelligent welding robot 3. The intelligent welding robot 3 moves along the robot track groove 2 and stops moving at the positions corresponding to the joints between each small-diameter steel pipe 12 and the large-diameter steel pipe 11 to weld the joints between the small-diameter steel pipe 12 and the large-diameter steel pipe 11. After the welding is completed, continue to move to weld the joints between other small-diameter steel pipes 12 and the large-diameter steel pipe 11. The welding process includes two steps. One is to spot-weld the joints between the small-diameter steel pipe 12 and the large-diameter steel pipe 11 to initially fix the small-diameter steel pipe 12 and the large-diameter steel pipe 11 through multiple weld spots. The other is to weld the gaps between the weld spots. Between the multiple weld spots at the joints between the small-diameter steel pipe 12 and the large-diameter steel pipe 11, weld them in sequence to complete the full welding of the joints.

[0062] As described above, it is only the 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 of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An intelligent welding device for steel structures, characterized in that, Including: A welding base (1) with an inverted T-shaped bearing seat (5) fixedly installed at its top. On both sides of the top of the inverted T-shaped bearing seat (5), steel pipe support components are fixedly installed, and in the middle of the top of the inverted T-shaped bearing seat (5), a steel pipe clamping component is fixedly installed. At the top of the steel pipe support component, a large-diameter steel pipe (11) is arranged, and multiple small-diameter steel pipes (12) are clamped at the top of the steel pipe clamping component. An intelligent welding robot (3) with a welding head (4) fixedly installed at its top for welding the connection between the large-diameter steel pipe (11) and the small-diameter steel pipe (12). A robot track groove (2) is opened at the top of the welding base (1), and the intelligent welding robot (3) moves along the robot track groove (2). The main body of the steel pipe support component is a support groove body (6). Inside the support groove body (6), multiple lifting hydraulic cylinders (8) are arranged. At the top of the telescopic end of the lifting hydraulic cylinder (8), a steel pipe clamping frame (9) is fixedly installed. The main body of the steel pipe clamping component is a clamping groove body (10). Inside the clamping groove body (10), multiple bearing connecting plates (18) are arranged. At the top of the bearing connecting plate (18), a clamping connecting plate (24) is arranged. At both ends of the upper surface of the clamping connecting plate (24), end limiting plates (31) are welded. On both sides of the top between the two end limiting plates (31), steel pipe clamping arm plates (32) are rotatably installed, and the two steel pipe clamping arm plates (32) are symmetrically arranged.

2. The intelligent welding equipment for steel structures according to claim 1, characterized in that: A fixed connecting seat (25) is fixedly installed in the middle of the upper surface of the clamping connecting plate (24). Inside the fixed connecting seat (25), a bidirectional threaded rod (26) is rotatably installed, and the axis of the bidirectional threaded rod (26) is perpendicular to the deflection axis of the steel pipe clamping arm plate (32).

3. The intelligent welding equipment for steel structures according to claim 2, characterized in that: Threaded sleeves (27) are sleeved at both ends of the bidirectional threaded rod (26). At the top of the threaded sleeve (27), a clamping support arm plate (29) is rotatably connected, and the top of the clamping support arm plate (29) is rotatably connected to the adjacent steel pipe clamping arm plate (32).

4. An intelligent welding device for steel structures according to claim 1, characterized in that: A T-shaped plate (19) is fixedly connected to the lower surface of the bearing connecting plate (18). At both ends of the lower surface of the T-shaped plate (19), limit side plates (20) are fixedly connected. Between the two limit side plates (20), multiple moving rollers (21) are rotatably installed at equal intervals.

5. The intelligent welding device for steel structures according to claim 4, characterized in that: An internal threaded sleeve (36) is fixedly connected to one side of the limit side plate (20). Inside the internal threaded sleeve (36), a connecting threaded rod (37) is fixedly installed. At the end of the connecting threaded rod (37), a fixed backing plate (38) is sleeved.

6. The intelligent welding equipment for steel structures according to claim 5, characterized in that: Threaded rod fitting sliding grooves (40) are opened on the front and back sides of the clamping groove body (10). The connecting threaded rod (37) passes through the threaded rod fitting sliding groove (40) and is threadedly installed with an extrusion nut (39) for extruding the fixed backing plate (38).

7. An intelligent welding device for steel structures according to claim 1, characterized in that: The top end of the load-bearing connecting plate (18) is fixedly connected with a positioning sleeve (22). A rotating connecting block (23) fixedly connected to the lower surface of the clamping connecting plate (24) is rotatably installed at the top of the inner cavity of the positioning sleeve (22). And a plurality of locking bolts (35) are equidistantly installed on the outer wall of the bottom of the positioning sleeve (22) in a threaded manner.

8. The intelligent welding equipment for steel structures according to claim 1, characterized in that: Support mounting grooves (13) are respectively formed at both ends of the upper surface of the inverted T-shaped load-bearing seat (5). A plurality of groove body support rollers (14) are rotatably installed at equal intervals inside the support mounting grooves (13). A set of stable transverse movement hydraulic cylinders (16) are fixedly installed on the front and back surfaces of the inverted T-shaped load-bearing seat (5). The telescopic ends of the stable transverse movement hydraulic cylinders (16) are fixedly connected with the support groove body (6).

9. The intelligent welding equipment for steel structures according to claim 1, characterized in that: A plurality of seat cylinder support rollers (15) are rotatably installed at equal intervals on the inner wall of the bottom end of the clamping groove body (10). An installation seat cylinder (7) is arranged at the top end of the seat cylinder support rollers (15). The lifting hydraulic cylinder (8) is fixedly installed inside the installation seat cylinder (7).

10. The usage method of an intelligent welding device for steel structures according to any one of claims 1-9, characterized in that, It includes the following steps: S1: Clamp the small-diameter steel pipes (12); place a plurality of small-diameter steel pipes (12) between multiple pairs of steel pipe clamping arm plates (32) respectively, and then rotate the corresponding bidirectional threaded rod (26) clockwise to make the two translation sliders (27) approach each other. Then, drive the two steel pipe clamping arm plates (32) to deflect synchronously and reversely through the clamping support arm plate (29) to clamp the small-diameter steel pipes (12). S2: Clamp the large-diameter steel pipes (11); place the two large-diameter steel pipes (11) on the tops of the corresponding steel pipe holders (9) of the two support groove bodies (6) respectively. Then start the lifting hydraulic cylinder (8) to lift the height of the large-diameter steel pipes (11) so that the axes of the large-diameter steel pipes (11) and the axes of the small-diameter steel pipes (12) are in the same plane. Then control the two support groove bodies (6) to approach each other through the stable transverse movement hydraulic cylinders (16) so that the two large-diameter steel pipes (11) clamp the plurality of small-diameter steel pipes (12). S3: Weld the steel pipes; start the intelligent welding robot (3). The intelligent welding robot (3) moves along the robot track groove (2), stops moving at the corresponding positions of the joints between each small-diameter steel pipe (12) and the large-diameter steel pipe (11), welds the joints between the small-diameter steel pipe (12) and the large-diameter steel pipe (11). After the welding is completed, continue to move to weld the joints between other small-diameter steel pipes (12) and the large-diameter steel pipes (11).

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