Steel structure butt welding device

Abstract

The invention relates to the technical field of pressurized butt welding, in particular to a steel structure butt welding device which comprises a supporting frame, two carrying plates capable of horizontally moving are arranged above the supporting frame, a rotating pushing mechanism adopting a parallelogram design is arranged above the carrying plates, and the rotating pushing mechanism comprises a top plate. The bottom of the top plate is rotationally connected with two parallel movable rods, the bottoms of the movable rods are rotationally connected with a bottom plate, and the bottom of the bottom plate is fixedly connected with a first pressure block and a second pressure block. The first pressure block can drive the pushing and fastening assembly to move at the same height in a rotating mode, the movable block continuously pushes the steel channels through friction force in the rotating process till the two steel channels are pushed to completely abut against each other, and a gap generated between the two steel channels due to counter-acting force is eliminated.

Description

Technical Field

[0001] The present invention relates to the field of metal welding equipment, particularly to the field of pressure butt welding technology, and specifically to a steel structure butt welding device. Background Art

[0002] The unique U-shaped cross-section groove of the channel steel can form a natural cable / pipeline channel. In the construction of student dormitory buildings, channel steel can be installed at the top of the dormitory aisle to assist in the installation of natural cables / pipelines and facilitate the subsequent maintenance of cables and pipelines.

[0003] For the convenience of transporting channel steel, channel steel is generally transported in multiple segments, and the length of each segment of channel steel is generally not more than 2m. For the installation of channel steel, during use, the segmented channel steel needs to be welded together. Common steel structure welding methods include butt welding. For example, a steel structure column butt welding device proposed in the patent application number "CN202320838488.X" uses a heating element to heat the steel structure, which requires pushing the steel structure together and then clamping the steel structure for butt welding. However, in the prior art, when pushing the channel steel together, when the two channel steels come into contact, under the action of the reaction force, the two channel steels will have a small degree of separation, resulting in a butt gap between the two channel steels. The gap causes insufficient filling of molten metal, entraining air or impurities, forming pores or slag inclusions, thereby affecting the welding strength of the channel steel structure. Summary of the Invention

[0004] The purpose of the present invention is to provide a steel structure butt welding device to solve the problems raised in the above background art.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A steel structure butt welding device includes a support frame. Above the support frame, there are two horizontally movable carrier plates. Above the carrier plates, there is a spiral pushing mechanism designed in a parallelogram. The spiral pushing mechanism includes a top plate. At the bottom of the top plate, there are two parallelly arranged movable rods rotatably connected. At the bottom of the movable rods, there is a bottom plate rotatably connected. At the bottom of the bottom plate, there are fixedly connected a first pressure block and a second pressure block. On the first pressure block, there is a pushing and fastening component. The pushing and fastening component includes a pressure spring fixed to the top inner wall of the first pressure block. At the bottom of the pressure spring, there is a connecting rod fixedly connected. At the bottom of the connecting rod, there is a movable block connected. The bottom of the movable block penetrates through the first pressure block and extends to the outside of the first pressure block. On both sides of the connecting rod, there are rotatably connected linkage rods. At one end of the linkage rods, there is a transverse plate rotatably connected. At one end of the transverse plate, it penetrates through the first pressure block and is fixedly connected with a compression-resistant plate.

[0006] Preferably, two movable cavities are formed in the support frame. A guide rod is fixedly connected inside the movable cavity. A sliding block is slidably connected to the guide rod. The carrier plate is fixed to the top of the sliding block. A hydraulic cylinder is installed in the movable cavity. The telescopic end of the hydraulic cylinder is fixedly connected to the sliding block and is used to drive the sliding block and the carrier plate to move horizontally.

[0007] Preferably, two symmetrically arranged telescopic cylinders are fixedly connected to the top of the carrier plate. The telescopic end of the telescopic cylinder is fixedly connected to a clamping plate.

[0008] Preferably, two inclined supporting brackets are fixedly connected to the top of the carrier plate. The top of the supporting bracket is fixedly connected to the top plate. A pushing cylinder is rotatably connected to the top plate. The telescopic end of the pushing cylinder is rotatably connected to one of the movable rods.

[0009] Preferably, a communicating pipe is fixedly connected inside the second pressure block. A suction cup is fixedly connected to the bottom of the communicating pipe.

[0010] Preferably, a vertical pipe is fixedly connected to the top of the inner wall of the first pressure block. The pressure spring is sleeved on the outer surface of the vertical pipe. A round rod is fixedly connected to the top of the connecting rod. A first piston is fixedly connected to the top of the round rod and is located inside the vertical pipe.

[0011] Preferably, a transverse air duct is formed inside the bottom plate. The vertical pipe and the communicating pipe are both communicated with the transverse air duct.

[0012] Preferably, a first adjusting plug and a second adjusting plug are arranged in the transverse air duct. A transverse connecting shaft is fixedly connected between the first adjusting plug and the second adjusting plug.

[0013] Preferably, a porous plate is fixedly connected inside the communicating pipe. A return spring is fixedly connected to the top of the porous plate. A second piston is fixedly connected to the top of the return spring. A guide wheel is fixedly connected to the top of the vertical pipe. A connecting rope is fixedly connected to the second piston. The connecting rope passes through the guide wheel and is fixedly connected to the second adjusting plug.

[0014] Preferably, an electric control air valve is fixedly installed on the vertical pipe and is located inside the second pressure block.

[0015] The beneficial effects of the present invention: 1. The present invention drives the first pressure block and the second pressure block to move by adopting a rotationally pushing mechanism designed in a parallelogram shape, enabling the first pressure block to drive the pushing and fastening assembly to move at the same height in a rotating manner. During the rotation process, the moving block continuously pushes the channel steel through friction until the two channel steels are pushed completely against each other, eliminating the gap generated between the two channel steels due to the reaction force. After the moving block moves up into the first pressure block, the bottom of the first pressure block presses tightly against the channel steel, and together with the adsorption of the channel steel by the suction cup at the bottom of the second pressure block, the channel steel is fastened jointly, preventing the channel steel after butt contact from generating a gap again due to the reaction force.

[0016] 2. When the moving block pushes the channel steel and moves up, the present invention uses the linkage rod to push the transverse plate and the compression plate, making the compression plate press tightly against the inner wall of the groove of the channel steel. While fastening the channel steel, it can also improve the compressive capacity of the side wall of the channel steel, enabling the telescopic cylinder to apply a stronger clamping force to the channel steel through the clamping plate. On the one hand, it improves the stability of the channel steel and better applies pressure. On the other hand, it can prevent the channel steel from having insufficient compressive capacity due to the inner groove, resulting in excessive deformation under pressure during clamping.

[0017] 3. When the moving block pushes the channel steel and moves up, the present invention uses the connecting rod to drive the first piston to move up, which can compress air into the transverse air duct. The air pressure pushes the first adjusting plug and the second adjusting plug, and the second adjusting plug drives the second piston to move up through the connecting rope, extracting the gas inside the connecting pipe and the suction cup, reducing the air pressure inside the suction cup, and enhancing the adsorption strength of the suction cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings; Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the support frame and the carrier plate proposed in the present invention; Figure 3 is the present invention Figure 2 a partial top view cross-sectional view of the support frame in the present invention; Figure 4 is the structural schematic diagram of the rotationally pushing mechanism proposed in the present invention; Figure 5 is the present invention Figure 4 a pushing state schematic diagram of the rotationally pushing mechanism in the present invention; Figure 6 is the present invention Figure 4 a fastening state schematic diagram of the rotationally pushing mechanism in the present invention; Figure 7 is a cross-sectional view of the side view of the first pressing block in the present invention; Figure 6 Figure 8 is a cross-sectional view of the side view of the second pressing block in the present invention; Figure 6 Figure 9 is a connection schematic diagram of the first pressing block and the second pressing block in the present invention; Figure 6 Figure 10 is an enlarged view of part A in the present invention; Figure 9

[0019] The reference numerals in the figure are as follows: 1, support frame; 101, heating element; 2, carrier plate; 201, channel steel; 3, rotation and pushing mechanism; 301, top plate; 302, movable rod; 303, bottom plate; 4, first pressure block; 401, guide plate; 402, guide sliding sleeve; 5, second pressure block; 6, pushing and fixing assembly; 601, pressure spring; 602, connecting rod; 603, movable block; 604, linkage rod; 605, transverse plate; 606, compression-resistant plate; 7, guide rod; 8, sliding block; 9, hydraulic cylinder; 10, telescopic cylinder; 11, clamping plate; 12, supporting bracket; 13, pushing cylinder; 14, connecting pipe; 15, suction cup; 16, vertical pipe; 17, first piston; 18, transverse air duct; 19, first adjusting plug; 20, second adjusting plug; 21, transverse connecting shaft; 22, perforated plate; 221, return spring; 23, second piston; 24, guide wheel; 25, connecting rope; 26, electric control air valve. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0021] Such as Figure 1-7 ​​​​, A butt welding device for steel structures, including a support frame 1. There is a heating element 101 at the top of the support frame 1. Above the support frame 1, two horizontally movable carrier plates 2 are arranged. The channel steel 201 to be welded is placed on the carrier plates 2. The heating element 101 is a resistance heating device in the prior art, and its outer shape is designed to fit the channel steel 201. One end of the two channel steels 201 that face each other is fitted inside the heating element 101, which can play the role of butt welding the channel steel 201. Above the carrier plate 2, there is a rotation and pushing mechanism 3 designed in a parallelogram. The rotation and pushing mechanism 3 includes a top plate 301. At the bottom of the top plate 301, two parallel movable rods 302 are rotatably connected. At the bottom of the movable rod 302, a bottom plate 303 is rotatably connected. At the bottom of the bottom plate 303, a first pressure block 4 and a second pressure block 5 are fixedly connected.

[0022] As Figure 1-7 , On the first pressure block 4, there is a pushing and fastening component 6. The pushing and fastening component 6 includes a pressure spring 601 fixed to the top of the inner wall of the first pressure block 4. At the bottom of the pressure spring 601, a connecting rod 602 is fixedly connected. At the bottom of the connecting rod 602, a movable block 603 is connected. The bottom of the movable block 603 penetrates the first pressure block 4 and extends to the outside of the first pressure block 4. The pressure spring 601 has a downward pressure on the connecting rod 602 and the movable block 603. Both the first pressure block 4 and the second pressure block 5 are located above the groove of the channel steel 201. When the rotation and pushing mechanism 3 drives the first pressure block 4 and the second pressure block 5 to move, the first pressure block 4 and the second pressure block 5 can move into the groove of the channel steel 201.

[0023] As Figure 1-7 , On both sides of the connecting rod 602, a linkage rod 604 is rotatably connected. One end of the linkage rod 604 is rotatably connected to a transverse plate 605. One end of the transverse plate 605 passes through the first pressure block 4 and is fixedly connected to a compression-resistant plate 606. A guiding plate 401 is fixedly connected inside the first pressure block 4. A guiding sliding sleeve 402 is fixedly connected to the linkage rod 604. The guiding sliding sleeve 402 and the guiding plate 401 are slidably connected, which can ensure the horizontal movement of the transverse plate 605 and the compression-resistant plate 606. When the movable block 603 moves up into the first pressure block 4, the compression-resistant plate 606 can just fit against the inner wall of the groove of the channel steel 201.

[0024] As Figure 1 、 Figure 2 and Figure 3, two movable chambers are formed on the support frame 1. A guide rod 7 is fixedly connected inside the movable chamber. A sliding block 8 is slidably connected to the guide rod 7. The carrier plate 2 is fixed to the top of the sliding block 8. By guiding with the guide rod 7, the horizontal movement of the sliding block 8 and the carrier plate 2 is ensured. The horizontal movement of the carrier plate 2 drives the horizontal movement of the channel steel 201. A hydraulic cylinder 9 is installed inside the movable chamber. The telescopic end of the hydraulic cylinder 9 is fixedly connected to the sliding block 8 and is used to drive the horizontal movement of the sliding block 8 and the carrier plate 2. The two movable chambers are symmetrically arranged, so that the two horizontal carrier plates 2 can drive the two channel steels 201 to move relative to each other.

[0025] As Figure 2 , two symmetrically arranged telescopic cylinders 10 are fixedly connected to the top of the carrier plate 2. The telescopic end of the telescopic cylinder 10 is fixedly connected to a clamping plate 11. The telescopic cylinder 10 and the clamping plate 11 are located on both sides of the channel steel 201 and can clamp the channel steel 201.

[0026] As Figure 1 , Figure 2 and Figure 4 , two inclined supporting brackets 12 are fixedly connected to the top of the carrier plate 2. The top of the supporting bracket 12 is fixedly connected to the top plate 301, so that the top plate 301 is fixed relative to the carrier plate 2 and can move together with the carrier plate 2. A pushing cylinder 13 is rotatably connected to the top plate 301. The telescopic end of the pushing cylinder 13 is rotatably connected to one of the movable rods 302.

[0027] The pushing cylinder 13, the telescopic cylinder 10 and the hydraulic cylinder 9 are all configured with power sources, and the setting of their power sources is a conventional setting in the art and can be completed by those skilled in the art according to the existing technology.

[0028] As Figure 1 , Figure 2 , Figure 4 and Figure 8 , a communicating pipe 14 is fixedly connected inside the second pressure block 5. A suction cup 15 is fixedly connected to the bottom of the communicating pipe 14. The bottom of the second pressure block 5 forms a concave, the suction cup 15 is located in the concave, and the bottom protrudes outside the second pressure block 5.

[0029] As Figure 6-10 , a vertical pipe 16 is fixedly connected to the top of the inner wall of the first pressure block 4. The pressure spring 601 is sleeved on the outer surface of the vertical pipe 16. The top of the connecting rod 602 is fixedly connected to a round rod. The top of the round rod is fixedly connected to a first piston 17 inside the vertical pipe 16. The first piston 17 just fits the vertical pipe 16 and plays a role in blocking gas.

[0030] As Figure 6-10 , a transverse air duct 18 is formed inside the bottom plate 303. The vertical pipe 16 and the communicating pipe 14 are both connected to the transverse air duct 18.

[0031] As Figure 6-10 , a first adjusting plug 19 and a second adjusting plug 20 are arranged in the transverse air duct 18. The first adjusting plug 19 and the second adjusting plug 20 are exactly adapted to the transverse air duct 18 and can block air. A transverse connecting shaft 21 is fixedly connected between the first adjusting plug 19 and the second adjusting plug 20, so that the first adjusting plug 19 and the second adjusting plug 20 can move together.

[0032] As Figure 6-10 , a perforated plate 22 is fixedly connected in the connecting pipe 14. There are a plurality of air holes on the perforated plate 22, so that the gases inside the connecting pipe 14 above and below the perforated plate 22 can flow to each other. A return spring 221 is fixedly connected to the top of the perforated plate 22. The top of the return spring 221 is fixedly connected to a second piston 23. A guide wheel 24 is fixedly connected to the top of the vertical pipe 16. A connecting rope 25 is fixedly connected to the second piston 23. The connecting rope 25 passes through the guide wheel 24 and is fixedly connected to the second adjusting plug 20. The guide wheel 24 can reduce the friction generated when the connecting rope 25 moves and reduce the wear of the connecting rope 25.

[0033] As Figure 6-10 , an electric control air valve 26 is fixedly installed on the vertical pipe 16 and inside the second pressure block 5. The electric control air valve 26 has a built-in power supply and can be controlled by an external switch.

[0034] The working principle of a steel structure butt welding device provided by the present invention is as follows: When two channel steels 201 are butted together manually or by an external mechanical structure, when the two channel steels 201 come into contact with each other, under the action of the reaction force, the two channel steels 201 will have a small separation, resulting in a butt joint gap between the two channel steels 201.

[0035] Through the rotation pushing mechanism 3 designed in a parallelogram above, when the pushing cylinder 13 extends, it can push the movable rod 302, drive the bottom plate 303 to move, and the bottom plate 303 drives the first pressure block 4 and the second pressure block 5 to move. (Utilizing the characteristic that the angles of the parallelogram change and the two sides always remain parallel, the first pressure block 4 and the second pressure block 5 always remain at the same height); As Figure 1 and Figure 4 , in the initial state, neither the first pressure block 4 nor the movable block 603 contacts the channel steel 201, which is convenient for the installation or removal of the channel steel 201 after welding; As Figure 5 , ( Figure 5In the case where the bottom of the movable block 603 just touches the channel steel 201), during the movement of the first pressure block 4, the first pressure block 4 moves in a manner of rotating along with the movable rod 302. When the movable block 603 contacts the channel steel 201, a component force acting rightward and downward is generated. As the first pressure block 4 moves rightward, it will continuously push the channel steel 201 through friction until the two channel steels 201 are pushed into complete contact with each other, eliminating the gap generated between the two channel steels 201 due to the reaction force. As Figure 6 , ( Figure 6 In the case where the movable block 603 has shrunk to contact the channel steel 201) after the first pressure block 4 has completed its movement, the downward component force of the movable block 603 will cause the movable block 603 to elastically contract upward. The movable block 603 moves upward into the interior of the first pressure block 4, and the bottom of the first pressure block 4 presses tightly against the channel steel 201, pressing the channel steel 201 tightly and performing fastening on the channel steel 201. At the same time, by utilizing the characteristic that the angles of the parallelogram change while keeping parallel on both sides, it can be ensured that both the bottom of the first pressure block 4 and the bottom of the movable block 603 remain flat. Whether the movable block 603 or the first pressure block 4 contacts the channel steel 201, the bottom can always be in complete contact with the channel steel 201, enhancing the frictional force between the movable block 603, the first pressure block 4, and the channel steel 201, and enabling better pushing and positioning of the channel steel 201.

[0036] As Figure 2 , Figure 4 and Figure 7 , the movable block 603 squeezes the connecting rod 602 and the pressure spring 601 upward, causing the pressure spring 601 to contract. During the process of the movable block 603 moving upward into the interior of the first pressure block 4, through the upward movement of the connecting rod 602, the linkage rod 604 is squeezed. The linkage rod 604 pushes the transverse plate 605 and the compression-resistant plate 606. The compression-resistant plate 606 props up the inner wall of the channel steel 201. There are clamping plates 11 that can move toward each other on both sides of the channel steel 201 above the carrier plate 2. By using the compression-resistant plate 606 to abut against the inner side of the channel steel 201, the compression resistance of the channel steel 201 is enhanced, enabling the clamping plates 11 to apply a greater clamping force during clamping, enhancing the stability of the channel steel 201, avoiding loosening after pressure is applied during butt welding (due to the inner groove of the channel steel 201, resulting in insufficient compression resistance), and at the same time avoiding excessive clamping pressure that may cause deformation of the channel steel 201 due to clamping.

[0037] As Figure 4 and Figure 8By utilizing the characteristics of the parallelogram angle change and the two sides always remaining parallel, the first pressure block 4 and the second pressure block 5 are always maintained at the same height, so that when the movable block 603 contacts the channel steel 201 and moves upward, the bottom of the suction cup 15 begins to contact the channel steel 201, and the suction cup 15 moves downward with the second pressure block 5 and absorbs the channel steel 201, thereby improving the stability and balance of the channel steel 201 and preventing the butt end of the channel steel 201 from moving slightly due to its own toughness, thereby affecting the butt joint accuracy of the two channel steels 201.

[0038] like Figure 7 , Figure 8 , Figure 9 and Figure 10 When the movable block 603 squeezes the channel steel 201 and pushes the channel steel 201, the suction cup 15 at the bottom of the second pressure block 5 also fits to the surface of the channel steel 201. As the movable block 603 is subjected to the reaction force of the channel steel 201, it continues to elastically shrink upward, and drives the first piston 17 to move upward through the connecting rod 602. The upward movement of the first piston 17 can push the gas inside the vertical pipe 16 where the first piston 17 is located, and increase the air pressure inside the transverse airway 18. The increase in the air pressure inside the transverse airway 18 will push the first regulating plug 19, and the first regulating plug 19 pushes the second regulating plug 20 through the transverse connecting shaft 21. The second regulating plug 20 pulls the second piston 23 upward through the connecting rope 25, and the second piston 23 extracts the gas inside the connecting pipe 14 and the suction cup 15, reducing the air pressure inside the suction cup 15. At this time, the suction cup 15 can better adsorb the channel steel 201, thereby enhancing the adsorption force of the suction cup 15. After the movable block 603 shrinks into the first pressure block 4, the first pressure block 4 presses the channel steel 201 to form two positioning points above the channel steel 201, thereby enhancing the ability of the channel steel 201 to resist the reaction force, and providing more reliable positioning after the movable block 603 pushes the channel steel 201 to eliminate the gap between the channel steels 201.

[0039] like Figure 1 , Figure 2 and Figure 7 The clamping plate 11 squeezes and fixes the channel steel 201, and then the carrier plate 2 drives the clamping plate 11 and the channel steel 201 to move, pressurizes the channel steel 201, and the opposite ends of the two channel steels 201 fit in the heating element 101, which can play the role of butt welding the channel steels 201.

[0040] On the contrary, after the two channel steels 201 are welded, the clamping plates 11 on both sides are separated, and then the electric control air valve 26 is opened first to balance the air pressure inside and outside the suction cup 15, and the push cylinder 13 contracts, pulling the movable rod 302 in the rotary push mechanism 3, and the bottom plate 303 drives the first pressure block 4 and the second pressure block 5 to move in a rotational manner, generating an upward and leftward component force, and as the first pressure block 4 moves upward, the spring extends and pushes the connecting rod 602 downward, and the connecting rod 602 drives the movable block 603 to move downward, and at the same time pulls the linkage rod 604, and the linkage rod 604 pulls the pressure plate 606, and the pressure plate 606 is separated from the inner wall of the channel steel 201, and the first pressure block 4 can be separated from the channel steel 201 upward; The downward movement of the connecting rod 602 will drive the first piston 17 to move downward. The downward movement of the first piston 17 will absorb the internal gas of the transverse airway 18. The internal air pressure of the transverse airway 18 will decrease, and the tension spring will contract to pull the second adjusting plug 20 through the connecting rope 25. The first adjusting plug 19 and the second adjusting plug 20 will be reset accordingly. At the same time, the rotational pushing mechanism 3 will drive the second pressure block 5 and the channel steel 201 to separate. At this time, the welded channel steel 201 can be removed.

[0041] Compared with the related art, the steel structure butt welding device provided by the present invention has the following beneficial effects: 1. The present invention drives the first pressure block 4 and the second pressure block 5 to move by adopting a parallelogram-designed rotational pushing mechanism 3, so that the first pressure block 4 can drive the pushing and tightening assembly 6 to rotate and keep it at the same height for movement, and during the rotation process, the movable block 603 continues to push the channel steel 201 by friction until the two channel steels 201 are pushed to completely collide with each other, eliminating the gap between the two channel steels 201 caused by the reaction force, and after the movable block 603 moves up to the inside of the first pressure block 4, the bottom of the first pressure block 4 presses the channel steel 201, and cooperates with the suction cup 15 at the bottom of the second pressure block 5 to adsorb the channel steel 201, and jointly tightens the channel steel 201, avoiding the channel steel 201 from generating a gap again due to the reaction force after the docking and collision.

[0042] 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 to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A butt welding device for steel structures, comprising a support frame (1), and two horizontally movable carrier plates (2) are arranged above the support frame (1), characterized in that, Above the carrier plate (2), a rotation and pushing mechanism (3) designed in a parallelogram shape is provided. The rotation and pushing mechanism (3) includes a top plate (301). At the bottom of the top plate (301), two parallelly arranged movable rods (302) are rotatably connected. At the bottom of the movable rods (302), a bottom plate (303) is rotatably connected. At the bottom of the bottom plate (303), a first pressure block (4) and a second pressure block (5) are fixedly connected. On the first pressure block (4), a pushing and fastening assembly (6) is provided. The pushing and fastening assembly (6) includes a pressure spring (601) fixed to the top of the inner wall of the first pressure block (4). At the bottom of the pressure spring (601), a connecting rod (602) is fixedly connected. At the bottom of the connecting rod (602), a movable block (603) is connected. The bottom of the movable block (603) penetrates through the first pressure block (4) and extends to the outside of the first pressure block (4). On both sides of the connecting rod (602), linkage rods (604) are rotatably connected. At one end of the linkage rod (604), a transverse plate (605) is rotatably connected. One end of the transverse plate (605) passes through the first pressure block (4) and is fixedly connected with a pressure-resistant plate (606).

2. The butt welding device for steel structures according to claim 1, characterized in that, On the support frame (1), two movable cavities are provided. Inside the movable cavities, guide rods (7) are fixedly connected. On the guide rods (7), sliding blocks (8) are slidably connected. The carrier plate (2) is fixed to the top of the sliding blocks (8). Inside the movable cavities, hydraulic cylinders (9) are installed. The telescopic ends of the hydraulic cylinders (9) and the sliding blocks (8) are fixedly connected, used to drive the sliding blocks (8) and the carrier plate (2) to move horizontally.

3. The butt welding device for steel structures according to claim 2, characterized in that, On the top of the carrier plate (2), two symmetrically arranged telescopic cylinders (10) are fixedly connected. The telescopic ends of the telescopic cylinders (10) are fixedly connected with clamping plates (11).

4. The butt welding device for steel structures according to claim 3, characterized in that, On the top of the carrier plate (2), two inclined supporting brackets (12) are fixedly connected. The top of the supporting brackets (12) and the top plate (301) are fixedly connected. On the top plate (301), a pushing cylinder (13) is rotatably connected. The telescopic end of the pushing cylinder (13) and one of the movable rods (302) are rotatably connected.

5. A butt welding device for steel structures according to claim 1, characterized in that, Inside the second pressure block (5), a communicating pipe (14) is fixedly connected. At the bottom of the communicating pipe (14), a suction cup (15) is fixedly connected.

6. The butt welding device for steel structures according to claim 5, characterized in that, At the top of the inner wall of the first pressure block (4), a vertical pipe (16) is fixedly connected. The pressure spring (601) is sleeved on the outer surface of the vertical pipe (16). At the top of the connecting rod (602), a round rod is fixedly connected. At the top of the round rod and inside the vertical pipe (16), a first piston (17) is fixedly connected.

7. A butt welding device for steel structures according to claim 6, characterized in that, Inside the bottom plate (303), a transverse air duct (18) is provided. The vertical pipe (16) and the communicating pipe (14) are both connected to the transverse air duct (18).

8. A steel structure butt welding device according to claim 7, characterized in that, Inside the transverse air duct (18), a first adjusting plug (19) and a second adjusting plug (20) are provided. Between the first adjusting plug (19) and the second adjusting plug (20), a transverse connecting shaft (21) is fixedly connected.

9. The butt welding device for steel structures according to claim 8, characterized in that, A porous plate (22) is fixedly connected inside the connecting pipe (14). A return spring (221) is fixedly connected to the top of the porous plate (22). A second piston (23) is fixedly connected to the top of the return spring (221). A guide wheel (24) is fixedly connected to the top of the vertical pipe (16). A connecting rope (25) is fixedly connected to the second piston (23). The connecting rope (25) passes through the guide wheel (24) and is fixedly connected to the second adjusting plug (20).

10. The butt welding device for steel structures according to claim 6, characterized in that, An electric control air valve (26) is fixedly installed on the vertical pipe (16) and inside the second pressure block (5).

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