Butt welding equipment and method for thin-wall small-caliber pipe

Abstract

The invention discloses butt welding equipment and a butt welding method for thin-wall small-caliber pipes, and relates to the technical field of pipeline welding. The equipment comprises a main body frame, wherein a mounting table is arranged on the main body frame; the fixing mechanism comprises a lower fixing block installed on the installation table and used for containing the right-angle adapter pipe, an upper fixing block matched with the lower fixing block to fix the right-angle adapter pipe is rotatably installed on the surface of the lower fixing block, a fixing magnet is fixedly installed on the surface of the lower fixing block, and an electrified magnet matched with the fixing magnet is fixedly installed on the surface of the upper fixing block. The electrified magnet generates magnetism after being electrified and is different from that of the fixed magnet; through cooperation of the gravity mechanism and the pushing mechanism, the straight pipe is driven to rotate left and right and is fed downwards at the same time, so that the feeding smoothness of the straight pipe into the right-angle transfer pipe is improved, the situation that the service life of a later pipeline is affected due to improper butt joint is avoided, and meanwhile, the situation that a port of the straight pipe deforms due to too large propelling force is avoided; and the expected use quality of the pipeline cannot be achieved.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding technology, and in particular to a butt welding device and method for thin-walled, small-diameter pipes. Background Technology

[0002] With the development of industry, pipeline manufacturing technology is constantly improving. Pipelines need to go through many processes during the manufacturing process to finally obtain the required finished products. Among them, the most important is pipeline welding. By using conversion joints to weld two pipes together, the flow direction of the pipeline can be changed to meet the actual use effect.

[0003] Currently, when welding right-angle pipes, the straight pipe needs to be inserted into the right-angle adapter to weld the pipe joint. However, the welding is currently done manually. Due to the small diameter and thinness of the pipes, it is easy to misalign or over-exert pressure during the connection, causing the straight pipe to deform. This results in insufficient weld strength or abnormal flow rate during use.

[0004] Based on this, the present invention designs a butt welding device and method for thin-walled small-diameter pipes to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a butt welding device and method for thin-walled small-diameter pipes, aiming to solve the technical problems existing in the prior art mentioned in the background.

[0006] This invention is implemented as follows: a butt welding device for thin-walled, small-diameter pipes, the device comprising: Main frame: It is equipped with an installation platform; The fixing mechanism includes a lower fixing block mounted on the mounting platform for placing the right-angle adapter pipe, an upper fixing block rotatably mounted on the surface of the lower fixing block for fixing the right-angle adapter pipe, a fixing magnet fixedly mounted on the surface of the lower fixing block, and a magnet that cooperates with the fixing magnet fixedly mounted on the surface of the upper fixing block. The magnet generates a magnetism that is different from that of the fixing magnet when energized. The lower fixing block and the upper fixing block are connected by a torsion spring. The mechanism also includes a straight pipe placement plate mounted on the mounting platform for placing straight pipes. Rotating mechanism: used to rotate the straight tube placement plate by 90 degrees; Gravity mechanism: In coordination with the propulsion mechanism, it drives the straight pipe to feed into the right-angle transfer pipe; The clearance mechanism is used to drive the straight pipe placement plate to move vertically. Rotation mechanism: used to drive the lower fixed block to reciprocate 180 degrees; Positioning mechanism: used to drive the right-angle adapter to rotate 90 degrees.

[0007] Furthermore, the rotating mechanism includes a rotating motor fixedly mounted on the mounting platform. The output end of the rotating motor is connected to the input end of the bevel gear set. The output end of the bevel gear set is fixedly connected to the linkage rotating rod. A central rotating rod is fixedly mounted on the surface of the linkage rotating rod. A load-bearing rod is fixedly mounted on the surface of the central rotating rod. The end of the load-bearing rod away from the central rotating rod is slidably connected to a support rod. The support rod is connected to the load-bearing rod through a compression spring. A straight tube placement plate is fixedly mounted on the surface of the support rod.

[0008] Furthermore, the gravity mechanism includes a hollow frame fixedly mounted on a load-bearing rod. A gravity slider is slidably mounted on the inner wall of the hollow frame. A connecting rope is fixedly mounted on the surface of the gravity slider. An inclined through hole that cooperates with the connecting rope is opened on the surface of the load-bearing rod. The end of the connecting rope away from the gravity slider is connected to a force-bearing block. The surface of the force-bearing block is connected to a straight tube placement plate through a return spring. Two connecting rods are rotatably mounted on the surface of the force-bearing block. An airbag tensioning block is fixedly mounted on the surface of each connecting rod. A cylindrical airbag is fixedly mounted on the surface of the airbag tensioning block. The cylindrical airbag is annular and its inner wall is in contact with the connecting rod.

[0009] Furthermore, the pushing mechanism includes a pushing motor fixedly mounted on the straight tube placement plate. The output end of the pushing motor is connected to the input end of the pushing bevel gear group, and the output end of the pushing bevel gear group is connected to the input end of the gear belt group. Two hollow rotating rods are fixedly mounted on the surface of the gear belt group. The hollow rotating rods pass through the straight tube placement plate and are rotatably connected to the straight tube placement plate. The surface of the hollow rotating rods is fixedly connected to the cylindrical airbag, and the hollow rotating rods are slidably connected to the connecting rod.

[0010] Furthermore, the yielding mechanism includes a yielding cylinder fixedly mounted on the load-bearing bar, and the output end of the yielding cylinder is connected to the straight pipe placement plate.

[0011] Furthermore, the rotation mechanism includes a rotation motor assembly fixedly mounted on the mounting platform. The rotation motor assembly consists of a drive motor and a drive gear. It also includes a mating gear mounted on the mounting platform that cooperates with the drive gear. A rotating main shaft is coaxially fixedly mounted on the surface of the mating gear. The rotating main shaft passes through the linkage rod and is rotatably connected to the linkage rod. A rotating table is fixedly mounted on the surface of the rotating main shaft. A rotating block is fixedly mounted on the surface of the rotating table. The rotating block is rotatably connected to the lower fixed block.

[0012] Furthermore, the displacement mechanism includes a displacement electromagnetic block fixedly installed on the load-bearing rod. The surface of the displacement electromagnetic block is connected to a permanent magnet via a connecting spring. The magnetism of the displacement electromagnetic block after being energized is different from that of the permanent magnet. A linkage frame is fixedly installed on the surface of the permanent magnet. A rotating circular block is rotatably installed on the inner wall of the linkage frame. A movable rack is fixedly installed on the inner wall of the rotating circular block. The movable rack meshes with a rotating gear. The rotating gear is coaxially fixedly connected to a lower fixed block. The connecting shaft between the rotating gear and the lower fixed block passes through the rotating block and is rotatably connected to the rotating block. A guide block that is slidably connected to the movable rack is fixedly installed on the surface of the rotating block.

[0013] The specific steps of the butt welding method for this thin-walled, small-diameter pipe are as follows: Step 1: Place the right-angle adapter and the straight pipe on the lower fixing block and the straight pipe placement plate respectively, and fix the right-angle adapter by the cooperation of the upper fixing block and the lower fixing block. Then, drive the lower fixing block and the straight pipe placement plate to tilt by the rotation mechanism, so that the straight pipe slides off the straight pipe placement plate under the action of gravity and mates with one end of the right-angle adapter. Step 2: During the tilting process of the straight pipe placement plate, the straight pipe is fed into the right-angle adapter pipe by the cooperation of the gravity mechanism and the pushing mechanism, while rotating itself to improve the smoothness of the straight pipe feeding into the right-angle adapter pipe. Step 3: After the straight pipe is fed in, the right-angle adapter is rotated 180 degrees by the self-rotating mechanism. At the same time, the pipe fitting position is welded by the external double-headed welding torch, thus completing the welding operation of one end of the right-angle adapter. Step 4: After welding is completed, all mechanisms are reset. At this time, the straight pipe placement plate is moved by the action of the clearance mechanism, thereby making way for the welded straight pipe. Then, the right-angle adapter pipe is rotated 90 degrees by the action of the displacement mechanism, so that the other end of the right-angle adapter pipe that is not welded moves to the welding position. After the straight pipe placement plate is reset, the new straight pipe is placed on the straight pipe placement plate. The above operation is repeated to complete the welding of the other end of the right-angle adapter pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention uses a rotating mechanism to drive the lower fixed block and the straight pipe placement plate to rotate. During the rotation, the straight pipe slides down the trajectory of the straight pipe placement plate under the action of gravity and connects with one end of the right-angle adapter pipe, thereby achieving the purpose of preliminary connection.

[0015] 2. This invention uses the cooperation of a gravity mechanism and a pushing mechanism to drive the straight pipe to rotate left and right while feeding it downwards, thereby improving the smoothness of the straight pipe feeding into the right-angle connector, avoiding improper connection that would affect the service life of the pipeline later, and also avoiding deformation of the straight pipe end due to excessive pushing force, which would prevent the pipeline from failing to meet the expected service quality. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a butt welding device for thin-walled small-diameter pipes provided in an embodiment of the present invention; Figure 2 For the present invention Figure 1 A magnified structural diagram at point A; Figure 3 This is a cross-sectional structural schematic diagram of a butt welding device for thin-walled small-diameter pipes according to the present invention; Figure 4 For the present invention Figure 3 A magnified structural diagram at point B; Figure 5 For the present invention Figure 3 A magnified structural diagram at point C; Figure 6 This is a schematic diagram of another cross-sectional view of the butt welding equipment for thin-walled small-diameter pipes according to the present invention. Figure 7 For the present invention Figure 6 A magnified structural diagram at point D; Figure 8 This is a schematic diagram of the installation position structure of the bevel gear set of the present invention; Figure 9 This is another cross-sectional view of the butt welding equipment for thin-walled small-diameter pipes according to the present invention. Figure 10 For the present invention Figure 9 Enlarged structural diagram at point E.

[0017] In the attached diagram: 1. Main frame; 101. Mounting platform; 2. Fixing mechanism; 201. Lower fixing block; 202. Upper fixing block; 203. Fixing magnet; 204. Electromagnet; 205. Torsion spring; 206. Straight tube placement plate; 3. Rotating mechanism; 301. Rotating motor; 302. Bevel gear set; 303. Linkage rod; 304. Central rotating rod; 305. Load-bearing rod; 306. Support rod; 307. Compression spring; 4. Gravity mechanism; 401. Hollow frame; 402. Gravity slider; 403. Connecting rope; 404. Force-bearing block; 405. Connecting rod; 406. Airbag stretching block; 407. Cylindrical airbag; 408. Return spring; 5. Pushing mechanism; 501. Pushing motor; 502. Pushing bevel gear assembly; 503. Gear and belt assembly; 504. Hollow rotating rod; 6. Yielding mechanism; 601. Yielding cylinder; 7. Rotation mechanism; 701. Rotation motor assembly; 702. Matching gear; 703. Rotating spindle; 704. Rotating table; 705. Rotating block; 8. Positioning mechanism; 801. Positioning electromagnetic block; 802. Connecting spring; 803. Permanent magnet; 804. Linkage frame; 805. Rotating circular block; 806. Moving rack; 807. Rotating gear; 808. Guide block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0019] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but unless otherwise stated, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, in one embodiment, a butt welding device and method for thin-walled small-diameter pipes are proposed, the device comprising: Main frame 1: It is equipped with a mounting platform 101; Fixing mechanism 2 includes a lower fixing block 201 mounted on the mounting platform 101 for placing a right-angle adapter pipe. An upper fixing block 202 is rotatably mounted on the surface of the lower fixing block 201 to cooperate with and fix the right-angle adapter pipe. A fixing magnet 203 is fixedly mounted on the surface of the lower fixing block 201. A magnet 204 that cooperates with the fixing magnet 203 is fixedly mounted on the surface of the upper fixing block 202. The magnet 204 generates a magnetism that is different from that of the fixing magnet 203 when energized. The lower fixing block 201 and the upper fixing block 202 are connected by a torsion spring 205. It also includes a straight pipe placement plate 206 mounted on the mounting platform 101 for placing a straight pipe. Rotating mechanism 3: used to drive the straight tube placement plate 206 to rotate 90 degrees; Gravity mechanism 4: In cooperation with the pushing mechanism 5, it drives the straight pipe to feed into the right-angle transfer pipe; The yielding mechanism 6 is used to drive the straight pipe placement plate 206 to move vertically; Rotation mechanism 7: used to drive the lower fixed block 201 to reciprocate 180 degrees; Positioning mechanism 8: used to drive the right-angle adapter pipe to rotate 90 degrees.

[0021] In practical applications, when welding right-angle adapter pipes and straight pipes, as in the embodiments of the present invention... Figure 2 As shown, first place the right-angle adapter pipe on the lower fixing block 201, as follows. Figure 1 As shown, the straight pipe is placed on the straight pipe placement plate 206. At this time, the electromagnet 204 is energized, and under the magnetic attraction, the upper fixing block 202 rotates, thereby cooperating with the lower fixing block 201 to fix the right-angle adapter pipe. After the right-angle adapter pipe is fixed, as shown... Figure 8 As shown, at this time, the rotating mechanism 3 drives the lower fixed block 201 and the straight pipe placement plate 206 to rotate. During the rotation, the straight pipe slides downward along the trajectory of the straight pipe placement plate 206 under the action of gravity and connects with one end of the right-angle adapter pipe. When the straight pipe placement plate 206 rotates to a vertical position, as shown... Figure 4 and Figure 7 As shown, the gravity mechanism 4 and the pushing mechanism 5 work together to drive the straight pipe to rotate left and right while simultaneously feeding it downwards. This improves the smoothness of the straight pipe's feeding into the right-angle connector, preventing improper connection from affecting the later service life of the pipeline. It also avoids deformation of the straight pipe's end due to excessive pushing force, which would prevent the pipeline from failing to meet its expected performance. Once the connection is complete, as shown... Figure 6As shown, at this time, the lower fixed block 201 drives the right-angle adapter pipe to perform an 80-degree reciprocating rotation through the action of the self-rotating mechanism 7. Then, the connection between the right-angle adapter pipe and the straight pipe is welded by the external double-headed symmetrical welding gun. It should be noted that the 180-degree reciprocating rotation is to avoid interference, and the double-headed symmetrical welding gun is to avoid deformation caused by heating a single point during welding. After the welding is completed, the mechanism resets. Figure 6 As shown, after resetting, the straight tube placement plate 206 moves vertically downwards through the action of the clearance mechanism 6, as... Figure 3 and Figure 5 As shown, the lower fixed block 201 is rotated by the displacement mechanism 8, so that the other end of the right-angle adapter pipe rotates to the welding position. After being reset by the repositioning mechanism 6, the above docking process is repeated to achieve the purpose of automatic switching welding.

[0022] like Figure 8 As shown, in a preferred embodiment of the present invention, the rotating mechanism 3 includes a rotating motor 301 fixedly mounted on the mounting platform 101. The output end of the rotating motor 301 is connected to the input end of the bevel gear set 302. The output end of the bevel gear set 302 is fixedly connected to the linkage rotating rod 303. A central rotating rod 304 is fixedly mounted on the surface of the linkage rotating rod 303. A load-bearing rod 305 is fixedly mounted on the surface of the central rotating rod 304. One end of the load-bearing rod 305 away from the central rotating rod 304 is slidably connected to a support rod 306. The support rod 306 is connected to the load-bearing rod 305 through a compression spring 307. A straight tube placement plate 206 is fixedly mounted on the surface of the support rod 306.

[0023] In practical applications, after fixing the right-angle adapter pipe and placing the straight pipe, as in the embodiments of the present invention... Figure 8 As shown, the rotating motor 301 starts running at this time. The operation of the rotating motor 301 drives the central rotating rod 304 to rotate through the transmission of the bevel gear set 302 and the linkage rotating rod 303, which in turn drives the load rod 305 to rotate. The rotation of the load rod 305 drives the lower fixed block 201 and the straight tube placement plate 206 to tilt synchronously. Under the action of gravity of the straight tube, it slides off the straight tube placement plate 206 and docks with one end of the right-angle adapter tube, thereby achieving the purpose of automatic docking.

[0024] like Figure 4 and Figure 7As shown, in another preferred embodiment of the present invention, the gravity mechanism 4 includes a hollow frame 401 fixedly installed on the load-bearing rod 305. A gravity slider 402 is slidably installed on the inner wall of the hollow frame 401. A connecting rope 403 is fixedly installed on the surface of the gravity slider 402. An inclined through hole that cooperates with the connecting rope 403 is opened on the surface of the load-bearing rod 305. One end of the connecting rope 403 away from the gravity slider 402 is connected to the force-bearing block 404. The surface of the force-bearing block 404 is connected to the straight tube placement plate 206 through a return spring 408. Two connecting rods 405 are rotatably installed on the surface of the force-bearing block 404. An airbag tensioning block 406 is fixedly installed on the surface of each connecting rod 405. A cylindrical airbag 407 is fixedly installed on the surface of the airbag tensioning block 406. The cylindrical airbag 407 is annular and its inner wall is in contact with the connecting rod 405.

[0025] In practical applications, when the straight pipe placement plate 206 is tilted to allow the straight pipe and right-angle adapter pipe to connect, as shown in the following embodiments of the present invention... Figure 4 As shown, the gravity of the slider 402 pulls the connecting rope 403, thereby causing the force-bearing block 404 to move obliquely downwards, as... Figure 7 As shown, the movement of the force-bearing block 404 pulls the cylindrical airbag 407 through the connecting rod 405 and the airbag stretching block 406. Under the action of the tension, the cylindrical airbag 407 flattens out and comes into contact with the straight tube. At this time, the cylindrical airbag 407 is driven to rotate by the action of the pushing mechanism 5. Due to the friction and the tilting state of the cylindrical airbag 407, the rotation of the two cylindrical airbags 407 drives the straight tube to feed into the right-angle adapter tube. At the same time, since the rotation direction of the two cylindrical airbags 407 is the same, they rotate while the straight tube is being fed, which makes the feeding operation of the straight tube smoother and avoids the straight tube from deforming due to resistance.

[0026] like Figure 7 As shown, in another preferred embodiment of the present invention, the pushing mechanism 5 includes a pushing motor 501 fixedly mounted on the straight tube placement plate 206. The output end of the pushing motor 501 is connected to the input end of the pushing bevel gear group 502. The output end of the pushing bevel gear group 502 is connected to the input end of the gear belt group 503. Two hollow rotating rods 504 are fixedly mounted on the surface of the gear belt group 503. The hollow rotating rods 504 pass through the straight tube placement plate 206 and are rotatably connected to the straight tube placement plate 206. The surface of the hollow rotating rods 504 is fixedly connected to the cylindrical airbag 407. The hollow rotating rods 504 are slidably connected to the connecting rod 405.

[0027] In practical applications, after the state adjustment of the cylindrical airbag 407 and the straight tube placement plate 206 are completed by the gravity mechanism 4 and moved to a vertical position, as shown in the following embodiments of the present invention... Figure 7As shown, the drive motor 501 starts running at this time. The operation of the drive motor 501 drives the cylindrical airbag 407 to rotate through the transmission of the bevel gear group 502, the gear belt group 503 and the hollow rotating rod 504. The rotation of the cylindrical airbag 407 drives the straight pipe to feed automatically, thereby achieving the purpose of automatically driving the right-angle adapter pipe and the straight pipe to connect.

[0028] like Figure 6 As shown, in another preferred embodiment of the present invention, the yielding mechanism 6 includes a yielding cylinder 601 fixedly installed on the load bar 305, and the output end of the yielding cylinder 601 is connected to the straight pipe placement plate 206.

[0029] In practical applications, after the welding operation is completed and the system is reset, as in the embodiments of the present invention... Figure 6 As shown, at this time, the operation of the clearance cylinder 601 drives the straight pipe placement plate 206 to move vertically downward, so as to avoid motion interference between the lower fixed block 201 and the straight pipe placement plate 206 when the right-angle adapter pipe switches the port later.

[0030] like Figure 6 As shown, in another preferred embodiment of the present invention, the rotation mechanism 7 includes a rotation motor assembly 701 fixedly mounted on the mounting platform 101. The rotation motor assembly 701 consists of a drive motor and a drive gear. It also includes a mating gear 702 mounted on the mounting platform 101 and cooperating with the drive gear. A rotating main shaft 703 is coaxially fixedly mounted on the surface of the mating gear 702. The rotating main shaft 703 passes through the linkage rod 303 and is rotatably connected to the linkage rod 303. A rotating platform 704 is fixedly mounted on the surface of the rotating main shaft 703. A rotating block 705 is fixedly mounted on the surface of the rotating platform 704. The rotating block 705 is rotatably connected to the lower fixed block 201.

[0031] In practical applications, when the straight pipe placement plate 206 is in a vertical position and the right-angle adapter pipe and the straight pipe are properly fitted, as shown in the following embodiments of the present invention... Figure 6 As shown, since the self-rotating motor unit 701 and the mating gear 702 are engaged, the self-rotating motor unit 701 starts to run. The operation of the self-rotating motor unit 701 is driven by the mating gear 702, the rotating main shaft 703, the rotating table 704 and the rotating block 705 to drive the fixed block 201 to reciprocate 180 degrees. At the same time, the mating position of the right-angle adapter pipe and the straight pipe is welded by external welding equipment, thereby achieving the purpose of automatic welding.

[0032] like Figure 3 , Figure 5 , Figure 9 and Figure 10As shown, in another preferred embodiment of the present invention, the displacement mechanism 8 includes a displacement electromagnetic block 801 fixedly installed on the load-bearing rod 305. The surface of the displacement electromagnetic block 801 is connected to the permanent magnet 803 through a connecting spring 802. The magnetism of the displacement electromagnetic block 801 after being energized is different from that of the permanent magnet 803. A linkage frame 804 is fixedly installed on the surface of the permanent magnet 803. A rotating circular block 805 is rotatably installed on the inner wall of the linkage frame 804. A movable rack 806 is fixedly installed on the inner wall of the rotating circular block 805. The movable rack 806 meshes with a rotating gear 807. The rotating gear 807 is coaxially fixedly connected to the lower fixed block 201. The connecting shaft between the rotating gear 807 and the lower fixed block 201 passes through the rotating block 705 and is rotatably connected to the rotating block 705. A guide block 808 that is slidably connected to the movable rack 806 is fixedly installed on the surface of the rotating block 705.

[0033] In practical application, after welding reset is completed, the straight pipe placement plate 206 is moved by the clearance mechanism 6 to make room, such as... Figure 3 As shown, when the displacement electromagnetic block 801 is energized, it uses magnetic attraction to move the permanent magnet 803 closer to the position of the displacement electromagnetic block 801. Figure 5 As shown, the moving rack 806 is driven to move horizontally by the linkage platform 804 and the rotating block 805. At this time, the movement of the moving rack 806 drives the rotating gear 807 to rotate, which in turn drives the lower fixed block 201 to rotate, so that the other end of the right-angle adapter pipe moves to the welding end, thereby achieving the purpose of automatically switching the position of the right-angle adapter pipe for welding at the other end. It should be noted that the rotation setting of the rotating block 805 and the linkage platform 804 is to prevent interference with the linkage platform 804 when the lower fixed block 201 is performing reciprocating rotation welding.

[0034] The specific steps of the butt welding method for this thin-walled, small-diameter pipe are as follows: Step 1: Place the right-angle adapter and the straight pipe on the lower fixing block 201 and the straight pipe placement plate 206 respectively, and fix the right-angle adapter by the cooperation of the upper fixing block 202 and the lower fixing block 201. Then, drive the rotating mechanism 3 to tilt the lower fixing block 201 and the straight pipe placement plate 206, so that the straight pipe slides off the straight pipe placement plate 206 under the action of gravity and mates with one end of the right-angle adapter. Step 2: During the tilting process of the straight pipe placement plate 206, the straight pipe is fed into the right-angle connector by the cooperation of the gravity mechanism 4 and the pushing mechanism 5, while rotating itself to improve the smoothness of the straight pipe feeding into the right-angle connector. Step 3: After the straight pipe is fed, the right-angle adapter is rotated 180 degrees by the self-rotating mechanism 7. At the same time, the pipe fitting position is welded by the external double-headed welding gun, thus completing the welding operation of one end of the right-angle adapter. Step 4: After welding is completed, all mechanisms are reset. At this time, the straight pipe placement plate 206 is moved by the action of the clearance mechanism 6, thereby making way for the welded straight pipe. Then, the right-angle adapter pipe is rotated 90 degrees by the action of the displacement mechanism 8, so that the other end of the right-angle adapter pipe that is not welded moves to the welding position. After the straight pipe placement plate 206 is reset, the new straight pipe is placed on the straight pipe placement plate 206. The above operation is repeated to complete the welding of the other end of the right-angle adapter pipe.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A butt welding device for thin-walled, small-diameter pipes, characterized in that, The device includes: Main frame (1): It is equipped with a mounting platform (101); Fixing mechanism (2): includes a lower fixing block (201) installed on the mounting platform (101) for placing a right-angle adapter pipe, an upper fixing block (202) rotatably mounted on the surface of the lower fixing block (201) for fixing the right-angle adapter pipe, a fixing magnet (203) fixedly mounted on the surface of the lower fixing block (201), and a magnet (204) fixedly mounted on the surface of the upper fixing block (202) for cooperating with the fixing magnet (203). The magnet (204) generates a magnetism different from that of the fixing magnet (203) after being energized. The lower fixing block (201) and the upper fixing block (202) are connected by a torsion spring (205). It also includes a straight pipe placement plate (206) installed on the mounting platform (101) for placing a straight pipe. Rotating mechanism (3): used to drive the straight tube placement plate (206) to rotate 90 degrees; Gravity mechanism (4): In cooperation with the push mechanism (5), it drives the straight pipe to feed into the right-angle transfer pipe; The clearance mechanism (6) is used to drive the straight pipe placement plate (206) to move vertically; Self-rotation mechanism (7): used to drive the lower fixed block (201) to reciprocate 180 degrees; Positioning mechanism (8): used to drive the right-angle adapter to rotate 90 degrees.

2. The butt welding equipment for thin-walled small-diameter pipes according to claim 1, characterized in that, The rotating mechanism (3) includes a rotating motor (301) fixedly installed on the mounting platform (101). The output end of the rotating motor (301) is connected to the input end of the bevel gear set (302). The output end of the bevel gear set (302) is fixedly connected to the linkage rod (303). A central rotating rod (304) is fixedly installed on the surface of the linkage rod (303). A load rod (305) is fixedly installed on the surface of the central rotating rod (304). The end of the load rod (305) away from the central rotating rod (304) is slidably connected to the support rod (306). The support rod (306) is connected to the load rod (305) through a compression spring (307). A straight tube placement plate (206) is fixedly installed on the surface of the support rod (306).

3. The butt welding equipment for thin-walled small-diameter pipes according to claim 2, characterized in that, The gravity mechanism (4) includes a hollow frame (401) fixedly installed on the load bar (305). A gravity slider (402) is slidably installed on the inner wall of the hollow frame (401). A connecting rope (403) is fixedly installed on the surface of the gravity slider (402). An inclined through hole that cooperates with the connecting rope (403) is opened on the surface of the load bar (305). One end of the connecting rope (403) away from the gravity slider (402) is connected to the force block (404). The surface of the force block (404) is connected to the straight tube placement plate (206) through a reset spring (408). Two connecting rods (405) are rotatably installed on the surface of the force block (404). An airbag stretching block (406) is fixedly installed on the surface of each connecting rod (405). A cylindrical airbag (407) is fixedly installed on the surface of the airbag stretching block (406). The cylindrical airbag (407) is set in a ring shape and its inner wall is in contact with the connecting rod (405).

4. The butt welding equipment for thin-walled small-diameter pipes according to claim 3, characterized in that, The pushing mechanism (5) includes a pushing motor (501) fixedly installed on the straight tube placement plate (206). The output end of the pushing motor (501) is connected to the input end of the pushing bevel gear group (502). The output end of the pushing bevel gear group (502) is connected to the input end of the gear belt group (503). Two hollow rotating rods (504) are fixedly installed on the surface of the gear belt group (503). The hollow rotating rods (504) pass through the straight tube placement plate (206) and are rotatably connected to the straight tube placement plate (206). The surface of the hollow rotating rods (504) is fixedly connected to the cylindrical airbag (407). The hollow rotating rods (504) are slidably connected to the connecting rod (405).

5. The butt welding equipment for thin-walled small-diameter pipes according to claim 2, characterized in that, The yielding mechanism (6) includes a yielding cylinder (601) fixedly installed on the load bar (305), and the output end of the yielding cylinder (601) is connected to the straight pipe placement plate (206).

6. The butt welding equipment for thin-walled small-diameter pipes according to claim 2, characterized in that, The self-rotation mechanism (7) includes a self-rotation motor assembly (701) fixedly installed on the mounting platform (101). The self-rotation motor assembly (701) is composed of a drive motor and a drive gear. It also includes a mating gear (702) installed on the mounting platform (101) and cooperating with the drive gear. A rotating main shaft (703) is fixedly installed on the surface of the mating gear (702) coaxially. The rotating main shaft (703) passes through the linkage rod (303) and is rotatably connected to the linkage rod (303). A rotating table (704) is fixedly installed on the surface of the rotating main shaft (703). A rotating block (705) is fixedly installed on the surface of the rotating table (704). The rotating block (705) is rotatably connected to the lower fixed block (201).

7. The butt welding equipment for thin-walled small-diameter pipes according to claim 2, characterized in that, The displacement mechanism (8) includes a displacement electromagnetic block (801) fixedly mounted on a load-bearing rod (305). The surface of the displacement electromagnetic block (801) is connected to a permanent magnet (803) via a connecting spring (802). The magnetism of the displacement electromagnetic block (801) after being energized is different from that of the permanent magnet (803). A linkage platform (804) is fixedly mounted on the surface of the permanent magnet (803). A rotating circular block (805) is rotatably mounted on the inner wall of the linkage platform (804). A movable rack (806) is fixedly installed on the inner wall of 05. The movable rack (806) meshes with a rotating gear (807). The rotating gear (807) is coaxially fixedly connected to the lower fixed block (201). The connecting shaft between the rotating gear (807) and the lower fixed block (201) passes through the rotating block (705) and is rotatably connected to the rotating block (705). A guide block (808) that is slidably connected to the movable rack (806) is fixedly installed on the surface of the rotating block (705).

8. A butt welding method for thin-walled small-diameter pipes, applicable to the butt welding equipment for thin-walled small-diameter pipes as described in any one of claims 1-7, characterized in that: The specific steps of the butt welding method for this thin-walled, small-diameter pipe are as follows: Step 1: By placing the right-angle adapter and the straight pipe on the lower fixing block (201) and the straight pipe placement plate (206) respectively, and fixing the right-angle adapter by the cooperation of the upper fixing block (202) and the lower fixing block (201), and then driving the lower fixing block (201) and the straight pipe placement plate (206) to tilt by the drive of the rotating mechanism (3), so that the straight pipe slides off the straight pipe placement plate (206) under the action of gravity and cooperates with one end of the right-angle adapter; Step 2: During the tilting process of the straight pipe placement plate (206), the straight pipe is fed into the right-angle connector by the cooperation of the gravity mechanism (4) and the pushing mechanism (5) while rotating, thereby improving the smoothness of the straight pipe feeding into the right-angle connector; Step 3: After the straight pipe is fed, the right-angle adapter is driven to rotate 180 degrees by the action of the self-rotating mechanism (7). At the same time, the pipe fitting position is welded by the external double-headed welding gun, thus completing the welding operation of one end of the right-angle adapter. Step 4: After welding is completed, all mechanisms are reset. At this time, the straight pipe placement plate (206) is moved by the action of the repositioning mechanism (6) to make way for the welded straight pipe. Then, the right-angle adapter pipe is rotated 90 degrees by the action of the displacement mechanism (8) so that the other end of the right-angle adapter pipe that is not welded moves to the welding position. After the straight pipe placement plate (206) is reset, the new straight pipe is placed on the straight pipe placement plate (206). The above operation is repeated to complete the welding of the other end of the right-angle adapter pipe.

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