Profile butt welding device for constructional engineering

Abstract

The invention belongs to the technical field of sectional material butt welding, and particularly relates to a sectional material butt welding device for constructional engineering, which comprises a worktable and a plurality of U-shaped grooves formed in the upper end face of the worktable, a carrier roller is rotationally arranged in an inner cavity of each U-shaped groove and used for supporting a tubular sectional material for conveying and moving, and a welder is arranged at the upper end of the worktable. The butt welding device comprises a workbench, two sets of grooves are formed in the upper end face of the workbench, the number of the grooves in each set is two, the two grooves are arranged in a triangular shape, and the upper end of the workbench is slidably connected with two sets of positioning butt joint assemblies. However, two tubular profiles are difficult to move close to each other for butt joint in the clamping process of the tubular profiles, so that after the tubular profiles are clamped and positioned, if a gap between the two tubular profiles is large, clamping needs to be loosened again for adjustment, operation is tedious, and the butt welding efficiency of the tubular profiles is affected.

Description

Technical Field

[0001] The present invention belongs to the technical field of profile butt welding, and specifically relates to a profile butt welding device for construction engineering. Background Art

[0002] Profiles refer to solid or hollow straight bars formed by plastic processing of metals, having certain cross-sectional shapes and dimensions. There are many types of profiles, which are often used in engineering construction. Especially tubular profiles are one of the essential profiles in projects such as building water supply and ventilation. However, the length of a tubular profile formed in one processing is limited. Therefore, a butt welding device is usually used to splice and weld the tubular profiles to increase the length of the tubular profiles.

[0003] A patent with the publication number CN115533543B discloses a shearing butt welding device that is easy to correct. This device can initially align the steel strip through an alignment baffle to reduce the offset of the end of the steel strip; the feeding table can provide support for the steel strip to be welded, and the limiting member can slide on the feeding table to limit the moving distance of the clamped steel strip, enabling the operator to move the end of the steel strip to a suitable position by controlling the moving distance of the limiting member, thereby aligning the steel strip. The guiding plate can make the steel strip conveyed at other angles move quickly along the direction perpendicular to the length direction of the shearing groove, so as to achieve an alignment effect under the clamping of the first limiting baffle and the second limiting baffle, making the cut of the steel strip neater.

[0004] The above solution still has some problems in actual application. When the butt welding object is a tubular profile, when two tubular profiles to be welded are placed on the workbench, it is necessary to control the two tubular profiles to be docked with each other in advance, and at the same time, the overall position and angle of each tubular profile need to be adjusted so that the two tubular profiles are in a straight line before the welding device can be controlled to weld the docking part of the tubular profiles. This not only makes the operation cumbersome but also affects the efficiency of the butt welding of the tubular profiles. Especially after the docking of the two tubular profiles is completed, if one of the tubular profiles moves, it will affect the docking angle, resulting in a decrease in the overall structural strength of the welded profile and affecting the service life of the profile.

[0005] Therefore, the present invention provides a profile butt welding device for construction engineering. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A butt welding device for profiles in construction engineering according to the present invention includes a workbench and a plurality of U-shaped grooves opened on the upper end surface of the workbench. A roller is rotatably arranged in the inner cavity of each U-shaped groove for lifting and conveying a tubular profile. A welding device is arranged on the upper end of the workbench. Grooves are symmetrically arranged on the workbench on one side of each roller. The two grooves and the roller are arranged in a triangle. Two groups of positioning and docking components are slidably connected to the upper end of the workbench;

[0008] And the two groups of positioning and docking components include two chutes opened on the upper end surface of the workbench. Two T-shaped sliding rods are slidably connected in the inner cavity of each chute. Circular sliders are slidably arranged on the two T-shaped sliding rods. A second clamping column is fixedly connected to the upper end of the circular slider. A rack is installed on the inner wall of one side of the groove. A gear is fixedly connected to the lower end of the circular slider in the inner cavity of the groove;

[0009] The lower end of the circular slider is slidably connected in the inner cavity of the groove. Driving the T-shaped sliding rod to drive the circular slider to move closer to each other enables the second clamping column to clamp and position the tubular profile. At the same time, when the circular slider moves to the position of the rack, the gear meshes with the rack, and the gear drives the second clamping column to rotate, continuously pushing the two tubular profiles to butt and tighten.

[0010] Preferably, a rack is installed on the inner wall of the groove. A gear is fixedly connected to the lower end of the circular slider in the inner cavity of the groove, and the gear is meshed and connected with the rack.

[0011] Preferably, a plurality of rotating columns are rotatably connected to the upper end of the T-shaped sliding rod, and a first clamping column is fixedly connected to the upper ends of the plurality of rotating columns. A tension spring is fixedly connected to the inner part of the lower end of the first clamping column, and one end of the tension spring is fixedly connected to a sliding disk, and the sliding disk is slidably connected to the outside of the rotating column.

[0012] Preferably, a T-shaped sliding column is slidably connected to the inner part of the upper end of the first clamping column. A resisting block is fixedly connected to the upper end of the T-shaped sliding column. The mutually approaching surfaces of the resisting block and the sliding disk are both in a semi-circular arc shape, which can better fit and abut against the surface of the tubular profile.

[0013] Preferably, a spring is arranged in the inner cavity of the first clamping column. One end of the spring abuts against the inner wall of the first clamping column, and the other end is fixedly installed with the T-shaped sliding column.

[0014] Preferably, a rotating groove is opened at the bottom of the inner cavity of the chute. A driven bevel gear is rotatably connected to the bottom of the inner cavity of the rotating groove. A rotating frame is fixedly connected to the upper end of the driven bevel gear. Pulling rods are rotatably connected to both ends of the rotating frame. One end of the pulling rod is rotatably connected to the T-shaped sliding rod.

[0015] Preferably, one end of the driven bevel gear penetrates through the workbench and is meshed and connected with a driving bevel gear. A rotating shaft is fixedly connected inside the driving bevel gear. One end of the rotating shaft is fixedly connected with the output shaft of a driving motor, and the driving motor is fixedly installed on the workbench.

[0016] Preferably, a limiting groove is formed in the middle of the upper end surface of the workbench. An auxiliary welding assembly is arranged in the inner cavity of the limiting groove. The auxiliary welding assembly includes two sliding frames fixedly installed in the inner cavity of the limiting groove. Four transmission gears are rotatably arranged between the two sliding frames. A semi-circular rotating frame is externally meshed with the transmission gears. A welding device is installed in the inner cavity of the semi-circular rotating frame.

[0017] Preferably, two semi-circular fixing frames are fixedly connected to the mutually approaching surfaces of the sliding frames. A synchronous motor is arranged in the inner cavities of the two semi-circular fixing frames. The output shaft end of the synchronous motor is fixedly connected with the transmission gear. The semi-circular rotating frame is rotatably connected to the outside of the semi-circular fixing frame.

[0018] Preferably, a plurality of tooth blocks are arranged on the outer sides of both sides of the semi-circular rotating frame. The semi-circular rotating frame is meshed with the transmission gear through the tooth blocks. The semi-circular rotating frame is clamped and installed on the outside of the semi-circular fixing frame, so that when the semi-circular rotating frame rotates, it will not fall off from the outside of the semi-circular fixing frame.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. For the profile butt welding device for construction engineering of the present invention, by placing two tubular profiles on the workbench, driving the T-shaped slide bars to move closer to each other at the same time, and making the T-shaped slide bars drive the rotating columns to move synchronously, and then driving the first clamping columns to move to clamp and position the tubular profiles. After the first clamping columns clamp the tubular profiles, by using the tension spring to pull the sliding disk to slide on the outside of the rotating column, the tubular profiles are lifted, and at the same time, the T-shaped sliding column is bounced by the spring and slides into the inner cavity of the first clamping column, driving the abutting block to move downward, and then abutting against the upper part of the tubular profiles, so as to realize the clamping and positioning of the tubular profiles, ensure the accuracy of the butt joint of the two tubular profiles, and prevent deviation in the butt joint of the two tubular profiles.

[0021] 2. For the profile butt welding device for construction engineering of the present invention, by driving the circular sliders to move closer to each other, the gears and the racks will be engaged and rotated, and then the second clamping columns will be driven to rotate. During the process of clamping and fixing the tubular profiles by using the second clamping columns, since rubber tooth blocks are arranged on the outside of the second clamping columns, as the second clamping columns move closer to each other, the rubber tooth blocks will deform. At the same time, during the rotation of the second clamping columns, the two tubular profiles are driven to move closer to each other. Therefore, during the clamping and positioning process of the two tubular profiles, the two tubular profiles can be pushed to move closer to each other to reduce the gap between the butt joints, and the overall structural strength after the butt welding of the two tubular profiles can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 is a schematic structural diagram of the overall front view of the present invention;

[0024] Figure 2 is a schematic structural diagram of the overall bottom-up perspective of the present invention;

[0025] Figure 3 is a schematic assembly structural diagram of the positioning and docking component of the present invention;

[0026] Figure 4 is a schematic partial cross-sectional structural diagram of the workbench of the present invention;

[0027] Figure 5 is a schematic internal cross-sectional structural diagram of the groove of the present invention;

[0028] Figure 6 is a schematic half-sectional structural diagram of the T-shaped slide bar of the present invention;

[0029] Figure 7 is a schematic assembly structural diagram of the auxiliary welding component of the present invention;

[0030] Figure 8 is a schematic overall top-down structural diagram of the butt welding equipment of the present invention;

[0031] Figure 9 is a schematic diagram of the operation of the auxiliary welding component of the present invention;

[0032] In the figure: 1, workbench; 2, tubular profile; 3, limit groove; 4, auxiliary welding component; 41, sliding frame; 42, semi-circular fixed frame; 43, semi-circular rotating frame; 44, transmission gear; 5, positioning and docking component; 51, T-shaped slide bar; 52, first clamping column; 53, cross-shaped chute; 54, gear; 55, second clamping column; 56, chute; 57, circular slider; 6, welding torch; 7, drive motor; 8, rotating shaft; 9, driving bevel gear; 10, driven bevel gear; 11, rotating groove; 12, rotating frame; 13, pull rod; 14, abutting block; 15, T-shaped sliding column; 16, spring; 17, rotating column; 18, sliding disc; 19, tension spring; 20, groove; 21, rack; 22, idler roller; 23, U-shaped groove. DETAILED DESCRIPTION OF THE INVENTION

[0033] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0034] Embodiment 1

[0035] As Figures 1 to 9As shown in the figure, a butt welding device for profiles used in construction engineering according to an embodiment of the present invention includes a workbench 1 and a plurality of U-shaped grooves 23 opened on the upper end surface of the workbench 1. A roller 22 is rotatably arranged in each U-shaped groove 23 for supporting and conveying the tubular profile 2. A welder 6 is arranged on the upper end of the workbench 1. Two groups of grooves 20 are opened on the upper end surface of the workbench 1, and each group of grooves 20 has two grooves, and the two grooves 20 are arranged in a triangle. Two groups of positioning and docking assemblies 5 are slidably connected to the upper end of the workbench 1;

[0036] And the two groups of positioning and docking assemblies 5 include two chutes 56 opened on the upper end surface of the workbench 1. Two T-shaped sliders 51 are slidably connected in each chute 56. Cross chutes 53 are opened at the upper ends of the two T-shaped sliders 51. A circular slider 57 is slidably connected in the cross chute 53. A second clamping column 55 is fixedly connected to the upper end of the circular slider 57. Rubber tooth blocks are uniformly arranged outside the second clamping column 55;

[0037] The lower end of the circular slider 57 is slidably connected in the inner cavity of the groove 20, which can drive the T-shaped slider 51 to drive the circular slider 57 to move closer to each other, and make the circular slider 57 drive the second clamping column 55 to move along the groove 20, so that the second clamping column 55 can clamp and position the tubular profile 2, and at the same time push the tubular profiles 2 to move closer to each other for docking.

[0038] Specifically, in the prior art, usually two tubular profiles to be welded are placed on the workbench, and the two tubular profiles are controlled to be docked with each other. At the same time, the overall position and angle of each tubular profile are adjusted so that the two tubular profiles are in a straight line, so as to ensure the accuracy of the docking between the two tubular profiles. Then, the welder is used to weld the docking part. However, since the existing butt welding device usually clamps two tubular profiles, it is difficult to push the two tubular profiles to move closer to each other for docking while clamping the tubular profiles. As a result, after the tubular profiles are clamped and positioned, if the gap between the two tubular profiles is large, it is necessary to loosen the clamping and adjust again, which is not only cumbersome to operate but also affects the butt welding efficiency of the tubular profiles;

[0039] In the present invention, two tubular profiles 2 to be butt-welded are placed on a workbench 1. At the same time, two T-shaped sliding rods 51 are driven to move closer to each other. Then, the two T-shaped sliding rods 51 drive a circular slider 57 to move, and the circular slider 57 drives a second clamping column 55 to move synchronously. Furthermore, the two tubular profiles 2 are clamped by the second clamping column 55, and at the same time, the two tubular profiles 2 are pushed towards the middle to ensure the accuracy of the butt joint of the tubular profiles 2. During the process of driving the circular sliders 57 to move closer to each other, the circular sliders 57 also slide in the inner cavity of the groove 20. Furthermore, when driving the second clamping column 55 to clamp the tubular profiles 2, the second clamping column 55 pushes the tubular profiles 2 to be butt-jointed closer to each other, so as to ensure the gap between the butt joints of the tubular profiles 2, avoid deviation in the butt joint of the tubular profiles 2 and a large butt joint gap, which affects the sealing performance and weld strength after welding. In this way, the stress distribution at the connection of the tubular profiles can be ensured to be uniform, avoiding stress concentration, thereby improving the strength and stability of the overall structure, and thus solving the above problems.

[0040] As Figures 3 to 6 and Figure 8 shown, a rack 21 is installed on the inner wall of the groove 20, and a gear 54 is fixedly connected to the lower end of the circular slider 57 in the inner cavity of the groove 20, and the gear 54 is meshed with the rack 21.

[0041] Specifically, when driving the circular sliders 57 to move closer to each other, the circular sliders 57 will drive the gears 54 to move synchronously. At the same time, during the movement of the gears 54, they engage and rotate with the rack 21, then drive the circular sliders 57 to rotate, and at the same time drive the second clamping columns 55 to rotate. During the process of clamping and fixing the tubular profiles 2 by the second clamping columns 55, since rubber tooth blocks are arranged on the outside of the second clamping columns 55, as the second clamping columns 55 move closer to each other, the rubber tooth blocks will deform. At the same time, during the rotation of the second clamping columns 55, the two tubular profiles 2 are driven to move closer to each other. Furthermore, during the clamping and positioning process of the two tubular profiles 2, the two tubular profiles 2 can also be pushed to move closer to each other to reduce the butt joint gap, improving the overall structural strength of the two tubular profiles 2 after butt welding, and solving the problem that in the existing butt joint device for profiles used in construction projects, if the butt joint position and the gap between the tubular profiles are not adjusted well before welding, it will cause that the welding cannot be modified and adjusted later, and if the butt joint angle of the tubular profiles is deviated and the butt joint gap is large, it will lead to low overall structural strength of the welded tubular profiles and it is difficult to meet the strength standard quality.

[0042] As Figure 3 and Figure 6As shown, multiple rotating columns 17 are rotatably connected to the upper end of the T-shaped sliding rod 51, and a first clamping column 52 is fixedly connected to the upper ends of the multiple rotating columns 17. A tension spring 19 is fixedly connected to the inside of the lower end of the first clamping column 52, and one end of the tension spring 19 is fixedly connected to a sliding disk 18. The sliding disk 18 is slidably connected to the outside of the rotating column 17.

[0043] As Figure 6 and Figure 8 shown, a T-shaped sliding column 15 is slidably connected to the inside of the upper end of the first clamping column 52. A blocking block 14 is fixedly connected to the upper end of the T-shaped sliding column 15. The mutually approaching surfaces of the blocking block 14 and the sliding disk 18 are both arranged in a semi-circular arc shape, which can better fit and abut against the surface of the tubular profile 2.

[0044] As Figure 3 and Figure 6 shown, a spring 16 is arranged in the inner cavity of the first clamping column 52. One end of the spring 16 abuts against the inner wall of the first clamping column 52, and the other end is fixedly installed on the T-shaped sliding column 15.

[0045] Specifically, before butt-welding the tubular profiles 2, by placing two tubular profiles 2 on the workbench 1, and simultaneously driving the T-shaped sliding rods 51 to move closer to each other, and making the T-shaped sliding rods 51 drive the rotating columns 17 to move synchronously, and then driving the first clamping columns 52 to move to clamp and position the tubular profiles 2. After the first clamping columns 52 clamp the tubular profiles 2, by using the tension spring 19 to pull the sliding disk 18 to slide on the outside of the rotating column 17, thereby lifting the tubular profiles 2. At the same time, using the spring 16 to push up the T-shaped sliding column 15 to slide into the inner cavity of the first clamping column 52, and driving the blocking block 14 to move downward, thereby abutting against the upper part of the tubular profiles 2, so as to realize the clamping and positioning of the tubular profiles 2, ensure the accuracy of the butt joint of the two tubular profiles 2, prevent deviation in the butt joint of the two tubular profiles 2, and solve the problem that it is difficult to clamp two tubular profiles for butt joint positioning when the profile butt-welding device for construction engineering is butt-welding tubular profiles, and at the same time, during the clamping and positioning process, pushing the two tubular profiles to closely approach and butt joint, thereby affecting the butt-welding processing efficiency of the tubular profiles.

[0046] Embodiment 2

[0047] As Figure 2 、 Figure 3 and Figure 6 shown, a rotating groove 11 is opened at the bottom of the inner cavity of the sliding groove 56. A driven bevel gear 10 is rotatably connected to the bottom of the inner cavity of the rotating groove 11. A rotating frame 12 is fixedly connected to the upper end of the driven bevel gear 10. Two pull rods 13 are rotatably connected to both ends of the rotating frame 12. One end of each pull rod 13 is rotatably connected to the T-shaped sliding rod 51.

[0048] As Figure 2 、 Figure 3 and Figure 6As shown in the figure, one end of the driven bevel gear 10 penetrates through the workbench 1 and is meshed and connected with the driving bevel gear 9. A rotating shaft 8 is fixedly connected inside the driving bevel gear 9. One end of the rotating shaft 8 is fixedly connected with the output shaft of the driving motor 7, and the driving motor 7 is fixedly installed with the workbench 1.

[0049] Specifically, before the butt welding of the tubular profile 2, by starting the driving motor 7 to drive the rotating shaft 8 to rotate, the driving bevel gear 9 is driven to rotate. At the same time, the driving bevel gear 9 meshes and drives the driven bevel gear 10 to rotate, and the driven bevel gear 10 drives the rotating frame 12 to rotate. During the rotation of the rotating frame 12, the pull rod 13 will be driven to move, and at the same time, the pull rod 13 pulls the T-shaped slide rod 51 to slide in the inner cavity of the chute 56, so as to realize the clamping and positioning effect of the tubular profile 2 and improve the butt welding accuracy.

[0050] As Figure 1 、 Figures 7 to 9 As shown in the figure, a limiting groove 3 is opened in the middle of the upper end surface of the workbench 1. An auxiliary welding assembly 4 is arranged in the inner cavity of the limiting groove 3. The auxiliary welding assembly 4 includes two sliding frames 41 fixedly installed in the inner cavity of the limiting groove 3. Four transmission gears 44 are rotatably arranged between the two sliding frames 41. A semi-circular rotating frame 43 is externally meshed with the transmission gears 44. A welding torch 6 is installed in the inner cavity of the semi-circular rotating frame 43.

[0051] As Figure 1 、 Figures 7 to 9 As shown in the figure, two semi-circular fixing frames 42 are fixedly connected to the mutually approaching surfaces of the sliding frames 41. A synchronous motor is arranged in the inner cavity of the two semi-circular fixing frames 42. The output shaft end of the synchronous motor is fixedly connected with the transmission gear 44. The semi-circular rotating frame 43 is rotatably connected to the outside of the semi-circular fixing frame 42.

[0052] As Figure 1 、 Figures 7 to 9 As shown in the figure, a number of tooth blocks are arranged on the outer sides of both sides of the semi-circular rotating frame 43. The semi-circular rotating frame 43 is meshed and connected with the transmission gear 44 through the tooth blocks. The semi-circular rotating frame 43 is snap-fitted and installed on the outside of the semi-circular fixing frame 42, so that when the semi-circular rotating frame 43 rotates, it will not fall off from the outside of the semi-circular fixing frame 42.

[0053] Specifically, when welding the tubular profile 2, start the synchronous motor to drive the transmission gear 44 to rotate, and make the transmission gear 44 mesh with the transmission semi-circular rotating frame 43 to rotate, then drive the welder 6 to rotate synchronously. During the rotation of the welder 6, start the welder 6 to weld the butt joint of the tubular profile 2. After the semi-circular rotating frame 43 rotates 180 degrees, the welding of the butt joint of the tubular profile 2 is completed, thus realizing the rapid butt welding of the tubular profile 2. This solves the problem that when the existing profile butt welding device for construction projects welds the tubular profile, it usually uses a robotic arm to control the welder to weld the butt joint of the tubular profile, and at the same time uses the butt welding device to control the rotation of the tubular profile to achieve welding. However, when the butt welding device controls the rotation of the tubular profile, it is easy to cause deviation at the butt joint of the tubular profile, affecting the overall structural strength of the tubular profile after welding and the quality of the tubular profile after processing.

[0054] Working principle: Before butt welding the tubular profile 2, place two tubular profiles 2 on the workbench 1, and at the same time drive the T-shaped slide bars 51 to move closer to each other, and make the T-shaped slide bars 51 drive the rotating columns 17 to move synchronously, then drive the first clamping columns 52 to move to clamp and position the tubular profile 2. After the first clamping column 52 clamps the tubular profile 2, use the tension spring 19 to pull the sliding disk 18 to slide outside the rotating column 17, thereby lifting the tubular profile 2. At the same time, use the spring 16 to push up the T-shaped slide column 15 to slide into the inner cavity of the first clamping column 52, and drive the abutting block 14 to move downward, thereby abutting against the upper part of the tubular profile 2, so as to realize the clamping and positioning of the tubular profile 2, ensure the accuracy of the butt joint of the two tubular profiles 2, and prevent deviation in the butt joint of the two tubular profiles 2;

[0055] When driving the circular sliders 57 to move closer to each other, the circular sliders 57 will drive the gears 54 to move synchronously. At the same time, during the movement of the gears 54, they will mesh and rotate with the rack 21, then drive the circular sliders 57 to rotate, and at the same time drive the second clamping columns 55 to rotate. During the process of using the second clamping columns 55 to clamp and fix the tubular profile 2, since rubber tooth blocks are arranged on the outside of the second clamping columns 55, as the second clamping columns 55 move closer to each other, the rubber tooth blocks will deform. At the same time, during the rotation of the second clamping columns 55, the two tubular profiles 2 are driven to move closer to each other, so that during the clamping and positioning process of the two tubular profiles 2, the two tubular profiles 2 can also be pushed to move closer to each other to reduce the gap between the butts, and improve the overall structural strength of the two tubular profiles 2 after butt welding;

[0056] When welding the tubular profile 2, start the synchronous motor to drive the transmission gear 44 to rotate, and make the transmission gear 44 engage with the transmission semi-circular rotating frame 43 to rotate, and then drive the welder 6 to rotate synchronously. During the rotation of the welder 6, start the welder 6 to weld the butt joint of the tubular profile 2. After the semi-circular rotating frame 43 rotates 180 degrees, the welding of the butt joint of the tubular profile 2 is completed, thus realizing the rapid butt welding of the tubular profile 2.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended technical solutions and their equivalents.

Claims

1. A butt welding device for profiles used in construction engineering, comprising a workbench (1) and a plurality of U-shaped grooves (23) opened on the upper end surface of the workbench (1). A roller (22) is rotatably arranged in the inner cavity of each U-shaped groove (23) for lifting a tubular profile (2) for conveying and moving. It is characterized in that: A welding machine (6) is provided at the upper end of the workbench (1). Grooves (20) are symmetrically arranged on the workbench (1) on one side of each idler roller (22). The two grooves (20) and the idler roller (22) are arranged in a triangle. Two groups of positioning and docking components (5) are slidably connected to the upper end of the workbench (1). And the two groups of positioning and docking components (5) include two chutes (56) opened on the upper end surface of the workbench (1). Two T-shaped slide bars (51) are slidably connected to the inner cavity of each chute (56). Circular sliders (57) are slidably arranged on the two T-shaped slide bars (51). A second clamping column (55) is fixedly connected to the upper end of the circular slider (57). A rack (21) is installed on the inner wall of one side of the groove (20). A gear (54) is fixedly connected to the lower end of the circular slider (57) and located in the inner cavity of the groove (20). The lower end of the circular slider (57) is slidably connected in the inner cavity of the groove (20). Driving the T-shaped slide bar (51) to drive the circular sliders (57) to move closer to each other, so that the second clamping column (55) clamps and positions the tubular profile (2). At the same time, when the circular slider (57) moves to the position of the rack (21), the gear (54) meshes with the rack (21), and the gear (54) drives the second clamping column (55) to rotate, continuously pushing the two tubular profiles (2) to butt and tighten.

2. The profile butt welding device for construction engineering according to claim 1, characterized in that: A plurality of rotating columns (17) are rotatably connected to the upper end of the T-shaped slide bar (51). A first clamping column (52) is fixedly connected to the upper ends of the plurality of rotating columns (17). A tension spring (19) is fixedly connected to the inner part of the lower end of the first clamping column (52). One end of the tension spring (19) is fixedly connected to a sliding disk (18). The sliding disk (18) is slidably connected to the outside of the rotating column (17).

3. The profile butt welding device for construction engineering according to claim 2, characterized in that: A T-shaped sliding column (15) is slidably connected to the inner part of the upper end of the first clamping column (52). A pressing block (14) is fixedly connected to the upper end of the T-shaped sliding column (15). The mutually approaching surfaces of the pressing block (14) and the sliding disk (18) are both arranged in a semi-circular arc shape, which can better fit and abut against the surface of the tubular profile (2).

4. A profile butt welding device for construction engineering according to claim 3, characterized in that: A spring (16) is arranged in the inner cavity of the first clamping column (52). One end of the spring (16) abuts against the inner wall of the first clamping column (52), and the other end is fixedly installed with the T-shaped sliding column (15).

5. The butt welding device for profiles used in construction engineering according to claim 1, wherein: A rotating groove (11) is opened at the bottom of the inner cavity of the chute (56). A driven bevel gear (10) is rotatably connected to the bottom of the inner cavity of the rotating groove (11). A rotating frame (12) is fixedly connected to the upper end of the driven bevel gear (10). Pulling rods (13) are rotatably connected to both ends of the rotating frame (12). One end of the pulling rod (13) is rotatably connected to the T-shaped slide bar (51).

6. The butt welding device for profiles used in construction engineering according to claim 5, characterized in that: One end of the driven bevel gear (10) penetrates through the workbench (1) and is meshed with a driving bevel gear (9). A rotating shaft (8) is fixedly connected to the inside of the driving bevel gear (9). One end of the rotating shaft (8) is fixedly connected to the output shaft of a driving motor (7), and the driving motor (7) is fixedly installed on the workbench (1).

7. The profile butt welding device for construction engineering according to claim 1, characterized in that: A limiting groove (3) is formed in the middle of the upper end surface of the workbench (1). An auxiliary welding assembly (4) is arranged in the inner cavity of the limiting groove (3). The auxiliary welding assembly (4) includes two sliding frames (41) fixedly installed in the inner cavity of the limiting groove (3). Four transmission gears (44) are rotatably arranged between the two sliding frames (41). A semi-circular rotating frame (43) is externally meshed with the transmission gears (44). A welding torch (6) is installed in the inner cavity of the semi-circular rotating frame (43).

8. The profile butt welding device for construction engineering according to claim 7, characterized in that: Two semi-circular fixing frames (42) are fixedly connected to the mutually approaching surfaces of the sliding frames (41). A synchronous motor is arranged in the inner cavity of the two semi-circular fixing frames (42). The output shaft end of the synchronous motor is fixedly connected to the transmission gear (44). The semi-circular rotating frame (43) is rotatably connected to the outside of the semi-circular fixing frame (42).

9. The butt welding device for profiles used in construction engineering according to claim 8, characterized in that: A plurality of tooth blocks are arranged on the outer sides of both sides of the semi-circular rotating frame (43). The semi-circular rotating frame (43) is meshed with the transmission gear (44) through the tooth blocks. The semi-circular rotating frame (43) is clamped and installed on the outside of the semi-circular fixing frame (42), so that when the semi-circular rotating frame (43) rotates, it will not fall off from the outside of the semi-circular fixing frame (42).

10. A profile butt welding device for construction engineering according to claim 1, characterized in that: Rubber tooth blocks are arranged on the outside of each second clamping column (55). Cross-shaped sliding grooves (53) are formed in the upper ends of the two T-shaped sliding rods (51). A circular sliding block (57) is slidably arranged in the inner cavity of the cross-shaped sliding groove (53).

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