A welding device and method for steel structure in construction engineering

Abstract

The present invention belongs to the technical field of steel structure welding, and relates to a welding device and method for steel structures in construction projects, including a processing bracket, a hydraulic cylinder, a connecting plate, a mounting frame, a support rod 1, a sliding frame and a support rod 2, wherein a hydraulic cylinder is installed in the middle of the top of the processing bracket, a connecting plate is connected to the telescopic rod of the hydraulic cylinder, mounting frames are connected to both sides of the bottom of the connecting plate, support rod 1 is connected between both sides of the two mounting frames, sliding frames are slidably connected to both sides of the lower part of the processing bracket, and support rod 2 is connected between both sides of the two sliding frames. In the process of welding H-shaped steel, the present invention can directly place two wing plates and a web plate, and limit the position through a clamping wheel, a fixed guide wheel and a movable guide wheel, and then the welding work can be carried out, and the plate adding work can be completed at one time, and there is no need to repeatedly add the plates, which is more convenient to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of steel structure welding and relates to a welding device and method for steel structures in construction engineering. Background Art

[0002] In construction engineering, steel structures are widely used in various construction projects due to their high strength, light weight and fast construction. Steel structures not only provide excellent load-bearing capacity, but also greatly shorten the construction period and reduce construction costs. However, in the assembly process of steel structures, especially the splicing process of H-shaped steel, welding is required to achieve the connection between steels.

[0003] At present, when welding H-shaped steel structures, semi-automatic welding machines are usually used to realize the splicing of H-shaped steels. When using semi-automatic welding machines to splice H-shaped steels, two steel plates are mainly welded into a T-shaped structure first, and then the steel of the T-shaped structure is welded with another steel plate to form the final H-shaped structure to complete the welding of the H-shaped steel. In the whole process, the steel plates need to be repeatedly fed and measured, the whole production process is relatively complicated, and the production efficiency is low. Summary of the invention

[0004] In view of this, the present invention provides a welding device and method for steel structures in construction engineering.

[0005] Technical solution: A welding device and method for steel structures in construction projects, comprising a processing bracket, a hydraulic cylinder, a connecting plate, a mounting bracket, a support rod 1, a sliding bracket, a support rod 2, a mounting plate, a welding gun, a transmission mechanism, a guiding mechanism and a fixing mechanism. A hydraulic cylinder is installed in the middle of the top of the processing bracket, a connecting plate is connected to the telescopic rod of the hydraulic cylinder, mounting brackets are connected to both sides of the bottom of the connecting plate, support rods 1 are connected between both sides of the two mounting brackets, sliding brackets are slidably connected to both sides of the lower part of the processing bracket, support rods 2 are connected between both sides of the two sliding brackets, mounting plates are slidably connected between both sides of the two support rods 1, and a welding gun that can be adjusted up and down is installed in the middle of the mounting plate A transmission mechanism is provided between the mounting frame and the sliding frame, and a guiding mechanism for guiding the wing plate is provided on the support rod one and the support rod two, and a fixing mechanism for pressing the web plate is provided on the processing bracket, and the fixing mechanism includes a swivel, a connecting frame, a cylinder, a guide sleeve, a movable rod, a pressure wheel and a driving assembly. Connecting frames are connected on both sides of the processing bracket, and a swivel is rotatably connected in the connecting frame. Cylinders are installed on both sides of the swivel, and a guide sleeve is connected on the telescopic rod of the cylinder. Movable rods are slidably connected on both sides of the guide sleeve, and pressure wheels are rotatably connected on the sides of the two movable rods away from each other, and a driving assembly for driving the swivel to rotate is provided between the processing bracket and the swivel.

[0006] In one embodiment, the transmission mechanism includes a connecting rack and a transmission gear, two connecting racks are connected to the bottom of the mounting frame and the top of the sliding frame, two transmission gears are rotatably connected on both sides of the processing bracket, and the connecting racks on the mounting frame and the sliding frame are respectively meshed with the two sides of the transmission gear.

[0007] In one of the embodiments, the guide mechanism includes a guide shaft, a fixed guide wheel, a movable guide wheel and an elastic member 1. The two support rods 1 and the two support rods 2 are slidably connected with the guide shafts on both sides. The sides of the guide shafts on both sides that are away from each other are connected with the fixed guide wheels. The sides of the two guide shafts on the support rod 1 that are close to each other are connected to the mounting plate. The sides of the guide shafts on both sides that are close to each other are slidably connected with the movable guide wheels. An elastic member 1 is connected between the movable guide wheel and the guide shaft, and the wing plate can be clamped between the movable guide wheel and the fixed guide wheel.

[0008] In one embodiment, the driving assembly includes an inner gear ring, a driving motor and a driving gear. The driving motor is installed on the lower part of both sides of the processing bracket. The driving gear is connected to the output shaft of the driving motor. The inner ring of the rotating ring is connected to the inner gear ring, and the driving gear is meshed with the inner gear ring.

[0009] In one of the embodiments, a supporting mechanism is also included, which includes an electric push rod, a supporting frame and electric wheels. Electric push rods are installed in the middle positions on both sides of the processing bracket. The telescopic rods of the electric push rods are connected to the supporting frame, and three electric wheels are evenly installed on the supporting frame.

[0010] In one of the embodiments, it also includes an injection mechanism, which includes an injection pipe, a control liquid tank and two elastic members. The control liquid tank is installed on the processing bracket, and two injection pipes are connected to the control liquid tank. The ends of the injection pipes are divided into two sections and are respectively connected to the inside of two guide sleeves. The two movable rods are connected with two elastic members. The control liquid tank, the injection pipe and the guide sleeve are all filled with hydraulic oil.

[0011] A welding method for steel structure in construction engineering, the specific steps are as follows:

[0012] S1: Insert the web plate between the upper and lower clamping wheels, control the extension of the telescopic rod of the cylinder to drive the guide sleeves and the clamping wheels on the upper and lower sides to move closer to each other and press the web plate to fix it;

[0013] S2: Control the extension of the telescopic rod of the hydraulic cylinder to drive the connecting plate to move downward. When the connecting plate moves downward, it can drive the mounting frame and the support rod to move downward, and drive the sliding frame and the second support rod to move upward through the connecting rack and the transmission gear;

[0014] S3: Insert the two wing plates on both sides of the processing bracket respectively, so that the wing plates pass through the gap between the movable guide wheels and the fixed guide wheels on both sides;

[0015] S4: Make the two side wing plates close to each other and close to the two sides of the web plate. When the wing plates move, they can push the movable guide wheels, fixed guide wheels and guide shafts on the upper and lower sides to move together. When the upper guide shaft moves, it can drive the mounting plate to move. The movement of the mounting plate can drive the welding gun to move. After the welding gun moves, its welding end can be aligned with the contact position between the wing plate and the web plate.

[0016] S5: Control the welding gun to start welding the wing plate and the web plate. During welding, the wing plate and the web plate are moved to adjust the welding position;

[0017] S6: After welding is completed, the telescopic rod of the hydraulic cylinder is controlled to retract, so that the mounting frame and the sliding frame are reset, and then the two clamping wheels are operated to expand outward to hold the side wall of the wing plate, and then the driving motor is controlled to drive the driving gear to rotate, and the driving gear pokes the inner gear ring to rotate, thereby driving the rotating ring to rotate, and the rotation of the rotating ring drives the wing plate and the web plate to rotate through the clamping wheel, so that the wing plate and the web plate are turned over to the other side;

[0018] S7: Control the drive motor to stop running, and then control the extension of the telescopic rod of the hydraulic cylinder to drive the mounting frame and the sliding frame closer, so that the welding gun is aligned with the contact position of the web and the wing plate, and then perform welding processing to complete the welding work of the H-beam.

[0019] Compared with the prior art, the present invention has the following advantages: 1. During the welding operation of H-shaped steel, the present invention can directly place two wing plates and a web plate, and limit them by means of a clamping wheel, a fixed guide wheel and a movable guide wheel, and then the welding work can be carried out. The work of adding plates can be completed at one time, and there is no need to repeatedly add plates. The operation is more convenient and more efficient.

[0020] 2. After welding one side of the H-shaped steel, the present invention can directly control the drive motor to rotate the swivel ring 180 degrees, thereby driving the clamping wheel to flip the H-shaped steel, and then the other side of the H-shaped steel can be welded. When it is necessary to weld the other side of the steel, the operation is more convenient and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the first structure of the transmission mechanism and the guide mechanism of the present invention.

[0023] Figure 3 It is a second structural schematic diagram of the transmission mechanism and the guide mechanism of the present invention.

[0024] Figure 4 It is a cross-sectional view of the guide mechanism of the present invention.

[0025] Figure 5 It is a structural schematic diagram of the fixing mechanism of the present invention.

[0026] Figure 6 It is a cross-sectional view of the fixing mechanism of the present invention.

[0027] Figure 7 It is a structural schematic diagram of the support mechanism of the present invention.

[0028] Figure 8 It is a structural schematic diagram of the support mechanism of the present invention.

[0029] Fig. 9 This is a schematic diagram of the first structure of the liquid injection mechanism of the present invention.

[0030] Fig.10 This is a second structural schematic diagram of the liquid injection mechanism of the present invention.

[0031] Wherein: 1: processing bracket, 2: hydraulic cylinder, 3: connecting plate, 4: mounting frame, 41: support rod one, 5: sliding frame, 51: support rod two, 6: mounting plate, 7: welding gun, 81: connecting rack, 82: transmission gear, 91: guide shaft, 92: fixed guide wheel, 93: movable guide wheel, 94: elastic part one, 101: swivel, 102: connecting frame, 103: cylinder, 104: guide sleeve, 105: movable rod, 106: clamping wheel, 111: inner gear ring, 112: driving motor, 113: driving gear, 121: electric push rod, 122: supporting frame, 123: electric wheel, 141: injection pipe, 142: control liquid tank, 143: elastic part two, 100: wing plate, 200: web plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] A welding device for steel structures in construction projects, such as Figure 1-Figure 6As shown, it includes a processing bracket 1, a hydraulic cylinder 2, a connecting plate 3, a mounting bracket 4, a support rod 1 41, a sliding bracket 5, a support rod 2 51, a mounting plate 6, a welding gun 7, a transmission mechanism, a guiding mechanism and a fixing mechanism. A hydraulic cylinder 2 is installed in the middle of the top of the processing bracket 1, and a connecting plate 3 is connected to the telescopic rod of the hydraulic cylinder 2. The left and right sides of the bottom of the connecting plate 3 are connected to the mounting bracket 4, and the front and rear sides of the two mounting brackets 4 are connected to the supporting rod 1 41. The left and right sides of the lower part of the processing bracket 1 are slidably connected to the sliding bracket 5, and the front and rear sides of the two sliding brackets 5 are connected to the supporting rod 2 51. The left and right sides of the two supporting rods 1 41 are slidably connected. The mounting plate 6 can slide left and right along the supporting rod 1 41, and a welding gun 7 that can be adjusted up and down is installed in the middle of the mounting plate 6. A transmission mechanism is provided between the mounting bracket 4 and the sliding bracket 5. The supporting rod 1 41 and the supporting rod 2 51 are provided with a guiding mechanism for guiding the wing plate 100, and the processing bracket 1 is provided with a fixing mechanism for pressing the web 200.

[0034] like Figure 3 As shown, the transmission mechanism includes a connecting rack 81 and a transmission gear 82. Two connecting racks 81 are connected to the bottom of the mounting frame 4 and the top of the sliding frame 5. Two transmission gears 82 are rotatably connected to the left and right sides of the processing bracket 1. The connecting racks 81 on the mounting frame 4 and the sliding frame 5 are respectively engaged with the two sides of the transmission gear 82, so that when the mounting frame 4 moves downward, it can drive the sliding frame 5 to move upward through the transmission of the connecting rack 81 and the transmission gear 82.

[0035] like Figure 2-Figure 4 As shown, the guide mechanism includes a guide shaft 91, a fixed guide wheel 92, a movable guide wheel 93 and an elastic member 94. The two support rods 1 41 and the two support rods 2 51 are slidably connected with the guide shafts 91 on both sides. The sides of the guide shafts 91 on both sides that are away from each other are connected with the fixed guide wheel 92. The sides of the two guide shafts 91 on the support rod 1 41 that are close to each other are connected to the mounting plate 6. The sides of the guide shafts 91 on the left and right sides that are close to each other are slidably connected with the movable guide wheel 93. An elastic member 94 is connected between the movable guide wheel 93 and the guide shaft 91. The elastic member 94 is a connecting spring. The wing plate 100 can be clamped between the movable guide wheel 93 and the fixed guide wheel 92 to guide and position the wing plate 100.

[0036] like Figure 5 and Figure 6As shown, the fixing mechanism includes a swivel 101, a connecting frame 102, a cylinder 103, a guide sleeve 104, a movable rod 105, a clamping wheel 106 and a driving assembly. The front and rear sides of the processing bracket 1 are connected to the connecting frame 102, and the swivel 101 is rotatably connected in the connecting frame 102. The cylinder 103 is installed on the upper and lower sides of the swivel 101, and the guide sleeve 104 is connected to the telescopic rod of the cylinder 103. The left and right sides of the guide sleeve 104 are slidably connected with the movable rod 105, and the sides of the two movable rods 105 away from each other are rotatably connected with the clamping wheel 106 for clamping the web 200. The web 200 can be placed between the clamping wheels 106 on the upper and lower sides during assembly, so that the cylinder 103 drives the clamping wheel 106 to move and can resist the web 200 to fix the web 200. A driving assembly for driving the swivel 101 to rotate is provided between the processing bracket 1 and the swivel 101.

[0037] like Figure 5 and Figure 6 As shown, the driving assembly includes an inner gear ring 111, a driving motor 112 and a driving gear 113. The driving motor 112 is installed at the lower part of the front and rear sides of the processing bracket 1. The driving gear 113 is connected to the output shaft of the driving motor 112. The inner ring of the rotating ring 101 is connected to the inner gear ring 111. The driving gear 113 is meshed with the inner gear ring 111, so that the operation of the driving motor 112 can drive the rotating ring 101 to rotate through the driving gear 113 and the inner gear ring 111.

[0038] When it is necessary to weld the H-shaped steel structure, this equipment can be used. When in use, first insert the web 200 into the middle of the clamping wheels 106 on the upper and lower sides. After inserting, control the telescopic rod of the cylinder 103 to extend to drive the guide sleeves 104 and the clamping wheels 106 on both sides to press the upper and lower sides of the web 200 to fix the web 200. After fixing, control the telescopic rod of the hydraulic cylinder 2 to extend to drive the connecting plate 3 to move downward. When the connecting plate 3 moves downward, it can drive the mounting frame 4 and the support rod 1 41 to move downward, and drive the sliding frame 5 and the support rod 2 51 to move upward through the connecting rack 81 and the transmission gear 82, so that the distance between the support rod 1 41 and the support rod 2 51 is slightly larger than the height of the wing plate 100, and then the two wing plates 100 are respectively inserted into the processing bracket 1 On both sides, the wing panels 100 are respectively passed through the gaps between the movable guide wheels 93 and the fixed guide wheels 92 on both sides, and the wing panels 100 are guided and positioned by the movable guide wheels 93 and the fixed guide wheels 92. In the process of inserting the wing panels 100, according to the different thicknesses of the wing panels 100, the wing panels 100 will squeeze the movable guide wheels 93 to move, so that the elastic member 94 is compressed, thereby guiding and fixing the wing panels 100 with different thicknesses, and the specific processing range is 5mm-30mm. After the operation is completed, the wing panels 100 on both sides are close to each other and close to the left and right sides of the web 200. In the process of moving the wing panels 100, the movable guide wheels 93, the fixed guide wheels 92 and the guide shaft 91 on the upper and lower sides can be pushed to move together, and the upper guide shaft 91 can bring The movable mounting plate 6 moves, and the movement of the mounting plate 6 can drive the welding gun 7 to move. After the welding gun 7 moves, its welding end can be aligned with the contact position of the wing plate 100 and the web 200. At this time, the welding gun 7 is controlled to start to weld the wing plate 100 and the web 200. While welding, the wing plate 100 and the web 200 are moved to adjust the welding position, so as to weld the position above the contact position of the web 200 and the wing plate 100. After welding is completed, the telescopic rod of the hydraulic cylinder 2 is controlled to retract, so that the mounting frame 4 and the sliding frame 5 are reset, and then the driving motor 112 is controlled to drive the driving gear 113 to rotate, and the driving gear 113 pokes the inner gear ring 111 to rotate, thereby driving the swivel 101 to rotate, and the rotation of the swivel 101 can be achieved through the compression on the upper and lower sides. The wheel 106 drives the wing plate 100 and the web plate 200 to rotate. After the swivel 101 rotates 180 degrees, the wing plate 100 and the web plate 200 also flip over one side. At this time, the control drive motor 112 stops operating, and the telescopic rod of the hydraulic cylinder 2 is controlled to extend again to drive the mounting frame 4 and the sliding frame 5 to approach, so that the welding gun 7 is against the contact position of the web plate 200 and the wing plate 100, and then the welding process can continue to be performed on the other side. In this way, the device can be used to weld the H-shaped steel structure, and the material only needs to be added once during welding to complete the welding process, which is more convenient and efficient to operate. In this embodiment, the thickness of the wing plate 100 is 5mm-30mm, and the thickness of the web plate 200 is 4mm-20mm.

[0039] like Figure 7 and Figure 8 As shown, a supporting mechanism is also included, and the supporting mechanism includes an electric push rod 121, a supporting frame 122 and an electric wheel 123. The electric push rod 121 is installed in the middle position of the left and right sides of the processing bracket 1, and the telescopic rod of the electric push rod 121 is connected to the supporting frame 122. Three electric wheels 123 are evenly installed on the supporting frame 122. The support frames 122 on both sides are close to each other to drive the electric wheels 123 on both sides to respectively press against the wing plates 100 on both sides to support and fix the wing plates 100, and then the electric wheels 123 are controlled to operate to transport the wing plates 100.

[0040] After placing the wing panels 100, when it is necessary to operate the wing panels 100 on both sides to move closer to each other, the electric push rods 121 on both sides can be directly controlled to drive the support frames 122 on both sides to move closer to each other. The support frames 122 on both sides moving closer to each other can drive the electric wheels 123 on both sides to move closer to each other, so that the electric wheels 123 on both sides push the wing panels 100 on both sides to move closer, thereby assisting the movement of the wing panels 100, and during welding, the wing panels 100 can also be supported and fixed. At the same time, when the wing panels 100 and the web plates 200 need to move, the electric wheels 123 can also be operated to drive the wing panels 100 and the web plates 200 to move, which is more convenient to operate.

[0041] like Figure 1 , Fig. 9 and Fig.10 As shown, it also includes an injection mechanism, which includes an injection pipe 141, a control liquid tank 142 and an elastic member 143. The control liquid tank 142 is installed on the right side of the processing bracket 1. The control liquid tank 142 is connected to two front and rear injection pipes 141. The end of the injection pipe 141 is divided into two sections and is respectively connected to the inside of the two guide sleeves 104. An elastic member 143 is connected between the two movable rods 105. The elastic member 143 is a reset spring. The control liquid tank 142, the injection pipe 141 and the guide sleeve 104 are all filled with hydraulic oil.

[0042] Before the clamping wheel 106 presses against the web 200, the control liquid tank 142 can be operated to start according to the width of the web 200, so that the control liquid tank 142 injects hydraulic oil into the guide sleeve 104 through the injection pipe 141 or extracts the hydraulic oil in the guide sleeve 104, thereby driving the movable rods 105 on both sides to move away from or towards each other, so as to drive the two clamping wheels 106 to move, so that the distance between the two clamping wheels 106 is slightly smaller than the width of the web 200, so as to facilitate the fixing of the web 200 and achieve a better fixing effect. Before the wing plate 100 and the web 200 need to be flipped over, the control liquid tank 142 can also be operated to inject hydraulic oil into the guide sleeve 104 through the injection pipe 141, so that the movable rods 105 and the clamping wheel 106 on both sides move away from each other and press against the wing plate 100, thereby assisting in fixing the wing plate 100 and ensuring stability during the flipping process.

[0043] This embodiment also provides a method for welding steel structures for construction projects, and the specific steps are as follows:

[0044] S1: Insert the web 200 between the upper and lower clamping wheels 106, control the telescopic rod of the cylinder 103 to extend, drive the guide sleeves 104 and the clamping wheels 106 on the upper and lower sides to move closer to each other, and press the web 200 to fix the web 200;

[0045] S2: Control the extension of the telescopic rod of the hydraulic cylinder 2 to drive the connecting plate 3 to move downward. When the connecting plate 3 moves downward, it can drive the mounting frame 4 and the supporting rod 1 41 to move downward, and drive the sliding frame 5 and the supporting rod 2 51 to move upward through the connecting rack 81 and the transmission gear 82;

[0046] S3: insert the two wing plates 100 on both sides of the processing bracket 1 respectively, so that the wing plates 100 pass through the gap between the movable guide wheels 93 and the fixed guide wheels 92 on both sides;

[0047] S4: The two side wing plates 100 are brought close to each other and pressed against the two sides of the web plate 200. During the movement of the wing plates 100, the movable guide wheels 93, the fixed guide wheels 92 and the guide shaft 91 on the upper and lower sides can be pushed to move together. The upper guide shaft 91 can drive the mounting plate 6 to move when moving. The movement of the mounting plate 6 can drive the welding gun 7 to move. After the welding gun 7 moves, its welding end can be aligned with the contact position between the wing plate 100 and the web plate 200.

[0048] S5: Controlling the welding gun 7 to start welding the wing plate 100 and the web plate 200. During welding, the wing plate 100 and the web plate 200 are moved to adjust the welding position;

[0049] S6: After welding is completed, the telescopic rod of the hydraulic cylinder 2 is controlled to retract, so that the mounting frame 4 and the sliding frame 5 are reset, and then the two clamping wheels 106 are operated to expand outward to hold up the side wall of the wing plate 100, and then the driving motor 112 is controlled to drive the driving gear 113 to rotate, and the driving gear 113 pokes the inner gear ring 111 to rotate, thereby driving the rotating ring 101 to rotate, and the rotating ring 101 rotates to drive the wing plate 100 and the web plate 200 to rotate through the clamping wheel 106, so that the wing plate 100 and the web plate 200 are turned over to the other side;

[0050] S7: Control the drive motor 112 to stop operating, and then control the telescopic rod of the hydraulic cylinder 2 to extend to drive the mounting frame 4 and the sliding frame 5 to move closer, so that the welding gun 7 is aligned with the contact position of the web 200 and the wing plate 100, and then perform welding processing to complete the welding work of the H-beam.

[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A welding device for steel structures in construction engineering, characterized by: The invention comprises a processing support (1), a hydraulic cylinder (2), a connecting plate (3), a mounting frame (4), a support rod 1 (41), a sliding frame (5), a support rod 2 (51), a mounting plate (6), a welding gun (7), a transmission mechanism, a guiding mechanism and a fixing mechanism. The hydraulic cylinder (2) is installed in the middle of the top of the processing support (1). The connecting plate (3) is connected to the telescopic rod of the hydraulic cylinder (2). The mounting frames (4) are connected to the two sides of the bottom of the connecting plate (3). The two mounting frames (4) are connected to the support rod 1 (41) between the two sides. The sliding frames (5) are slidably connected to the two sides of the lower part of the processing support (1). A second support rod (51) is connected between both sides of the sliding frame (5), a mounting plate (6) is slidably connected between both sides of the two first support rods (41), a welding gun (7) that can be adjusted up and down is installed in the middle of the mounting plate (6), a transmission mechanism is provided between the mounting frame (4) and the sliding frame (5), a guide mechanism for guiding the wing plate (100) is provided on the first support rod (41) and the second support rod (51), and a fixing mechanism for pressing the web (200) is provided on the processing bracket (1), the fixing mechanism comprising a swivel (101), a connecting frame (102), a cylinder (103), and a guide sleeve (104). 04), a movable rod (105), a pressure wheel (106) and a driving assembly, the processing support (1) is connected to a connecting frame (102) on both sides, a rotating ring (101) is rotatably connected inside the connecting frame (102), a cylinder (103) is installed on both sides of the rotating ring (101), a guide sleeve (104) is connected to the telescopic rod of the cylinder (103), and the two sides of the guide sleeve (104) are slidably connected to the movable rod (105), and the two movable rods (105) are rotatably connected to the pressure wheel (106) on the sides away from each other, and a driving assembly is provided between the processing support (1) and the rotating ring (101). A driving assembly for rotating the movable ring (101); and also comprising a liquid injection mechanism, the liquid injection mechanism comprising a liquid injection pipe (141), a control liquid tank (142) and a second elastic member (143). The processing bracket (1) is mounted with a control liquid tank (142). The control liquid tank (142) is connected to two liquid injection pipes (141). The ends of the liquid injection pipes (141) are divided into two sections and are respectively connected to the inside of two guide sleeves (104). The second elastic member (143) is connected between the two movable rods (105). The control liquid tank (142), the liquid injection pipe (141) and the guide sleeve (104) are all filled with hydraulic oil.

2. A welding device for steel structures in construction engineering as claimed in claim 1, characterized in that: The transmission mechanism comprises a connecting rack (81) and a transmission gear (82), the bottom of the mounting frame (4) and the top of the sliding frame (5) are both connected to two connecting racks (81), both sides of the processing bracket (1) are rotatably connected to two transmission gears (82), and the connecting racks (81) on the mounting frame (4) and the sliding frame (5) are respectively meshed with both sides of the transmission gear (82).

3. A welding device for steel structures in construction engineering as claimed in claim 2, characterized in that: The guide mechanism comprises a guide shaft (91), a fixed guide wheel (92), a movable guide wheel (93) and an elastic member 1 (94); the two support rods 1 (41) and the two support rods 2 (51) are slidably connected to the guide shaft (91) on both sides; the sides of the guide shafts (91) on both sides that are away from each other are connected to the fixed guide wheel (92); the sides of the two guide shafts (91) on the support rod 1 (41) that are close to each other are connected to the mounting plate (6); the sides of the guide shafts (91) on both sides that are close to each other are slidably connected to the movable guide wheel (93); an elastic member 1 (94) is connected between the movable guide wheel (93) and the guide shaft (91); and the wing plate (100) can be clamped between the movable guide wheel (93) and the fixed guide wheel (92).

4. A welding device for steel structures in construction engineering as claimed in claim 3, characterized in that: The driving assembly comprises an inner gear ring (111), a driving motor (112) and a driving gear (113); the driving motor (112) is installed at the lower part of both sides of the processing bracket (1); the driving gear (113) is connected to the output shaft of the driving motor (112); the inner ring of the rotating ring (101) is connected to the inner gear ring (111); and the driving gear (113) meshes with the inner gear ring (111).

5. The welding equipment for steel structure in construction engineering as claimed in claim 3, characterized in that: It also comprises a support mechanism, the support mechanism comprising an electric push rod (121), a support frame (122) and an electric wheel (123), the electric push rod (121) being installed at the middle position of both sides of the processing bracket (1), the telescopic rod of the electric push rod (121) being connected to the support frame (122), and three electric wheels (123) being evenly spaced and installed on the support frame (122).

6. A method for welding steel structures for construction projects based on the welding equipment for steel structures for construction projects according to claim 4, characterized in that: The specific steps are as follows: S1: insert the web (200) between the upper and lower clamping wheels (106), control the telescopic rod of the air cylinder (103) to extend, drive the guide sleeves (104) and the clamping wheels (106) on the upper and lower sides to move closer to each other, and press the web (200) to fix the web (200); S2: Control the hydraulic cylinder (2) to extend the telescopic rod to drive the connecting plate (3) to move downward. When the connecting plate (3) moves downward, it can drive the mounting frame (4) and the first support rod (41) to move downward, and drive the sliding frame (5) and the second support rod (51) to move upward through the connecting rack (81) and the transmission gear (82). S3: inserting two wing plates (100) on both sides of the processing bracket (1) respectively, so that the wing plates (100) pass through the gaps between the movable guide wheels (93) and the fixed guide wheels (92) on both sides; S4: The two side wing plates (100) are brought close to each other and pressed against the two sides of the web plate (200). During the movement of the wing plates (100), the movable guide wheels (93), the fixed guide wheels (92) and the guide shaft (91) on the upper and lower sides can be pushed to move together. When the upper guide shaft (91) moves, it can drive the mounting plate (6) to move. The movement of the mounting plate (6) can drive the welding gun (7) to move. After the movement of the welding gun (7), its welding end can be aligned with the contact position between the wing plate (100) and the web plate (200); S5: Controlling the welding gun (7) to start welding the wing plate (100) and the web plate (200), and during welding, the wing plate (100) and the web plate (200) are moved to adjust the welding position; S6: After welding is completed, the telescopic rod of the hydraulic cylinder (2) is controlled to retract, so that the mounting frame (4) and the sliding frame (5) are reset, and then the two clamping wheels (106) are operated to expand outward to press against the side wall of the wing plate (100), and then the driving motor (112) is controlled to drive the driving gear (113) to rotate, and the driving gear (113) pokes the inner gear ring (111) to rotate, thereby driving the rotating ring (101) to rotate, and the rotating ring (101) rotates through the clamping wheel (106) to drive the wing plate (100) and the web (200) to rotate, so that the wing plate (100) and the web (200) are flipped to the other side; S7: Control the driving motor (112) to stop operating, and then control the extension rod of the hydraulic cylinder (2) to drive the mounting frame (4) and the sliding frame (5) to move closer, so that the welding gun (7) is aligned with the contact position of the web (200) and the wing plate (100), and then the welding process is performed, thereby completing the welding work of the H-shaped steel.

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