Pipeline welding device for building construction

Abstract

The invention discloses a pipeline welding device for building construction, and relates to the technical field of pipeline welding for building construction, the pipeline welding device for building construction comprises a lifting plate, a square block, a clamp, an elastic telescopic pressing block, an elastic telescopic column, a bottom plate, a flat plate, a vertical plate and a sliding frame, the lifting plate is fixedly mounted at the top of a working plate, and the square block is fixedly mounted at the top of the lifting plate; the clamp is rotationally installed on the face, away from the electric welding device, of the square block, a through groove is formed in the top of the lifting plate, the bottom plate is fixedly installed at the bottom of the through groove, and the fixed end of the elastic telescopic column is fixedly installed at the top of the bottom plate, so that a to-be-welded pipeline can be firmly fixed to a specific position; therefore, the position accuracy of a welding seam is ensured, the welding quality is improved, the aligning gap and the unfitness of butt joint of the pipeline can be accurately adjusted and kept, the pipeline meets the requirements of a welding process, and welding defects are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline welding for building construction, in particular to a pipeline welding device for building construction. Background Art

[0002] The pipe welding device for construction is a device used for pipe welding, which is designed to facilitate the butt joint and welding of pipes through machines.

[0003] The patent with patent announcement number CN210132220U involves a support base and a rotating support. The center of the upper surface of the support base is fixedly connected to a sleeve, and the center of the lower surface of the rotating support is fixedly connected to a rotating support rod. The rotating support rod is inserted into a bearing and rotatably installed in the sleeve. The two ends of the upper surface of the rotating support are fixedly connected to hydraulic lifting columns, and the top of the hydraulic lifting column is fixedly connected to a pipeline support base plate. The pipeline support seat is slidably installed on the pipeline support base plate. The lower surface of the support base is fixedly connected to a gear ring. A notch is opened on the left side of the support base, and a forward and reverse motor is fixedly installed in the notch. The output shaft end of the forward and reverse motor is fixedly connected to a transmission gear, and the transmission gear is meshed with the gear ring. The device controls the extension and retraction of the hydraulic lifting column and the operation of the forward and reverse motor at the same time. In this way, the up and down height adjustment of the pipeline and the slight rotation of the pipeline are more conducive to fine-tuning the interface, which facilitates the relative interface and improves the welding quality.

[0004] In the above patent, the device controls the extension and retraction of the hydraulic lifting column and the operation of the forward and reverse motors, so that the up and down height adjustment of the pipeline and the slight rotation of the pipeline are more conducive to fine-tuning the interface, facilitating the relative position of the interface and improving the welding quality. However, there are still problems. It may move or shake during the welding operation, making it difficult to ensure the position accuracy of the weld, easily reducing the welding quality, and making it difficult to accurately adjust and maintain the joint gap and misalignment of the pipeline. It is impossible to ensure that the welding process requirements are met, which may increase the occurrence of welding defects. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a pipeline welding device for construction, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A pipe welding device for construction, comprising a frame, a working plate is fixedly installed on the top of the frame, an electric welding device is arranged on the right side of the frame, a wheel frame is fixedly installed on the bottom of the frame, a wheel is rotatably installed inside the wheel frame, a clamping mechanism is arranged on the top of the working plate, a fixing mechanism is arranged on the bottom of the frame, and a guiding mechanism is arranged on the right side of the frame; Wherein, the clamping mechanism includes a lifting plate, a block, a clamp, an elastic telescopic pressure block, an elastic telescopic column, a base plate, a flat plate, a vertical plate and a sliding frame, the lifting plate is fixedly mounted on the top of the working plate, the block is fixedly mounted on the top of the lifting plate, the clamp is rotatably mounted on a side of the block away from the electric welding device, a through groove is provided on the top of the lifting plate, the base plate is fixedly mounted on the bottom of the through groove, the fixed end of the elastic telescopic column is fixedly mounted on the top of the base plate, the fixed end of the elastic telescopic pressure block is fixedly mounted on the free end of the elastic telescopic column, a placement groove is provided on the top of the working plate, the sliding frame is fixedly mounted on the top of the placement groove, the vertical plate is slidably mounted in the sliding groove, the flat plate is fixedly mounted on the top of the vertical plate, the inner groove surface of the clamp will contact the outer wall of the pipe, applying a fixed force to the pipe, when the elastic telescopic pressure block moves downward, it will drive the connecting block to move, and when the connecting block moves, it will drive the pressure plate to move downward.

[0007] According to the above technical solution, the clamping mechanism also includes a rotating plate, a pressure plate and a connecting block. The rotating plate is rotatably installed at the bottom of the placement groove, one end of the connecting block is fixedly installed on the fixed end of the elastic telescopic pressure block, and the pressure plate is fixedly installed on the other end of the connecting block. When the connecting block moves, it will drive the pressure plate to move downward, and when the pressure plate moves, it will drive the rotating plate to rotate, and when the rotating plate rotates, it will drive the vertical plate to move inside the sliding groove of the sliding frame.

[0008] According to the above technical solution, the sliding frame is provided with a sliding groove, the bottom of the clamp contacts the fixed end of the elastic telescopic pressure block, the flat plate contacts the free end of the elastic telescopic pressure block, and the vertical plate contacts the rotating plate. When the rotating plate rotates, it drives the vertical plate to move inside the sliding groove of the sliding frame, and when the vertical plate moves, it drives the flat plate to move.

[0009] According to the above technical scheme, the fixing mechanism includes a connecting column, a connecting plate, a top plate, an elastic telescopic rod, a nail column and a guide plate, one end of the connecting column is fixedly installed on the bottom of the pressure plate, the nail column is fixedly installed on the other end of the connecting column, the top plate is fixedly installed on the surface of the working plate, the fixed end of the elastic telescopic rod is fixedly installed on the bottom of the top plate, the connecting plate is fixedly installed on the free end of the elastic telescopic rod, and the guide plate is slidably installed inside the frame. When the connecting column moves downward, the remaining two nail columns will be driven downward by the action of the connecting plate, when the nail column moves, the machine will be fixed, and when the nail column moves, the fan plate will be driven to move.

[0010] According to the above technical solution, the fixing mechanism also includes a fan plate, an elastic telescopic block, a long plate and a grinding plate. The fan plate is fixedly mounted on the circumferential surface of the nail column, the fixed end of the elastic telescopic block is fixedly mounted on the bottom of the fan plate, the long plate is fixedly mounted on the surface of the guide plate, and the grinding plate is rotatably mounted inside the wheel frame. When the fan plate moves, the elastic telescopic block will be driven to move, and when the elastic telescopic block moves, the guide plate will be driven to move downward.

[0011] According to the above technical solution, the connecting plate is fixedly connected to the connecting column, the long plate is in contact with the grinding plate, and the grinding plate is in contact with the wheel inside the wheel frame. When the grinding plate rotates, the wheel inside the wheel frame will be limited, and the machine will be fixed again. When the connecting column moves downward, the remaining two nail columns will be driven downward by the action of the connecting plate.

[0012] According to the above technical scheme, the guiding mechanism comprises a square frame, a telescopic rotating shaft, a rotating block, an elastic telescopic pillar, a circular ring, a guide block, a ball, a fixed block, a limiting block and a fixed rod, wherein the square frame is fixedly mounted inside the frame, the rotating block is fixedly mounted on the right bottom of the square frame, the telescopic rotating shaft is rotatably mounted on the bottom of the rotating block, the fixed end of the elastic telescopic pillar is fixedly mounted on the right top of the frame, the circular ring is fixedly mounted on the free end of the elastic telescopic pillar, the fixed block is fixedly mounted on the circumferential surface of the circular ring, the guide block is slidably mounted on the fixed block, the ball is rotatably mounted on the bottom of the guide block, the limiting block is fixedly mounted on a side of the circular ring close to the connecting column, a through sliding groove is opened on the top of the limiting block, the fixed rod is slidably mounted in the through sliding groove, and can be rotated downward by the ball, and when the pipeline rotates to a suitable position, the pipeline is pressed downward, and when the pipeline is pressed downward, the circular ring will be driven to move downward, and when the circular ring moves, it will squeeze the elastic telescopic pillar, and when the fixed rod moves, the pipeline will be fixed.

[0013] According to the above technical solution, the fixed rod is in contact with the telescopic rotating shaft, a No. 1 spring is arranged between the fixed block and the guide block, the elastic force coefficient of the elastic telescopic support is lower than the elastic force coefficient of the No. 1 spring, the connecting column is rotatably connected with the telescopic rotating shaft, and when the connecting column moves, the telescopic rotating shaft will be driven to rotate at the bottom of the rotating block under the square frame, and when the telescopic rotating shaft moves, the fixed rod will be driven to move under the action of the limiting block.

[0014] The present invention provides a pipeline welding device for construction, which has the following beneficial effects: (1) In the present invention, when the vertical plate moves, it will drive the flat plate to move. When the flat plate moves, it will limit the elastic telescopic pressure block, which can prevent the workpiece from moving upward during processing and causing welding deviation. When the lower part of the clamp rotates, the upper part of the clamp will rotate in the direction of the pipeline due to the action of the block. The inner groove surface of the clamp will contact the outer wall of the pipeline, applying a fixed force to the pipeline, so that the pipeline to be welded can be firmly fixed in a specific position to prevent it from moving or shaking during the welding operation, thereby ensuring the position accuracy of the weld and improving the welding quality. The gap and misalignment of the pipeline can be accurately adjusted and maintained to meet the welding process requirements and reduce the occurrence of welding defects.

[0015] (2) In this invention, when the long plate moves, it will drive the grinding plate to rotate inside the wheel frame. When the grinding plate rotates, it will limit the wheel inside the wheel frame to prevent the machine from shifting during the welding process. When the connecting column moves downward, the other two nail columns will be driven downward by the action of the connecting plate. When the nail column moves, it will fix the machine, which is conducive to making the welding arc length, welding speed and other parameters more stable, reducing the fluctuation of welding parameters caused by machine shaking or position change, helping to improve the consistency of weld quality, and at the same time ensuring that the welding gun or electrode moves according to the set welding path, so that the trajectory of the weld is more accurate, thereby improving the dimensional accuracy of the welding.

[0016] (3) In the present invention, when the pipe is inserted into the circular ring, the pipe will press the guide block on the fixed block outward, thereby providing precise motion guidance for the welding equipment or welding tools, ensuring that the weld is carried out along a predetermined trajectory, effectively reducing the deviation and misalignment of the weld, and improving the straightness and uniformity of the welding. When the circular ring moves, it will squeeze the elastic telescopic support, and when the fixed rod moves, it will fix the pipe to prevent the pipe from continuing to rotate. This can avoid the situation where the pipe rotates due to various factors and the welder needs to frequently stop the welding operation to readjust the position of the pipe, thereby reducing the number and time of adjustments during the welding process, thereby improving welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the lifting plate and the elastic telescopic pressing block structure of the present invention; Figure 3 It is a schematic diagram of the flat plate and the pressing plate structure of the present invention; Figure 4 It is a schematic diagram of the structure of the clamp and the elastic telescopic pressing block of the present invention; Figure 5 This is a schematic diagram of the elastic telescopic pressing block and pressing plate structure of the present invention; Figure 6 This is a schematic diagram of the structure of the connecting column and the guide plate of the present invention; Figure 7 It is a schematic diagram of the fan plate and wheel frame structure of the present invention; Figure 8 It is a schematic diagram of the square frame and the telescopic rotating shaft structure of the present invention.

[0018] In the figure: 1, frame; 2, working plate; 3, electric welding device; 401, lifting plate; 402, block; 403, clamp; 404, elastic telescopic pressure block; 405, elastic telescopic column; 406, bottom plate; 407, flat plate; 408, vertical plate; 409, sliding frame; 410, rotating plate; 411, pressure plate; 412, connecting block; 501, connecting column; 502, connecting plate; 503, top plate; 504 , elastic telescopic rod; 505, nail column; 506, guide plate; 507, fan plate; 508, elastic telescopic block; 509, long plate; 510, grinding plate; 601, square frame; 602, telescopic rotating shaft; 603, rotating block; 604, elastic telescopic support pillar; 605, ring; 606, guide block; 607, ball bearing; 608, fixed block; 609, limiting block; 610, fixed rod; 7, wheel frame. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 8 One embodiment of the present invention is: a pipe welding device for construction, comprising a frame 1, a working plate 2 is fixedly installed on the top of the frame 1, an electric welding device 3 is arranged on the right side of the frame 1, a wheel frame 7 is fixedly installed on the bottom of the frame 1, a wheel is rotatably installed inside the wheel frame 7, and a clamping mechanism is arranged on the top of the working plate 2; The clamping mechanism includes a lifting plate 401, a block 402, a clamp 403, an elastic telescopic pressure block 404, an elastic telescopic column 405, a bottom plate 406, a flat plate 407, a vertical plate 408 and a sliding frame 409. The lifting plate 401 is fixedly mounted on the top of the working plate 2, the block 402 is fixedly mounted on the top of the lifting plate 401, the clamp 403 is rotatably mounted on the side of the block 402 away from the welding device 3, a through groove is opened on the top of the lifting plate 401, the bottom plate 406 is fixedly mounted on the bottom of the through groove, and the fixed end of the elastic telescopic column 405 is fixedly mounted on the bottom plate The top of 406, the fixed end of the elastic telescopic pressure block 404 is fixedly installed on the free end of the elastic telescopic column 405, a placement groove is opened on the top of the working plate 2, the slide frame 409 is fixedly installed on the top of the placement groove, the vertical plate 408 is slidably installed in the slide groove, and the flat plate 407 is fixedly installed on the top of the vertical plate 408 to prevent it from moving or shaking during the welding operation, thereby ensuring the position accuracy of the weld, improving the welding quality, and can accurately adjust and maintain the joint gap and misalignment of the pipeline to meet the welding process requirements and reduce the occurrence of welding defects.

[0021] The clamping mechanism also includes a rotating plate 410, a pressure plate 411 and a connecting block 412. The rotating plate 410 is rotatably installed at the bottom of the placement groove. One end of the connecting block 412 is fixedly installed on the fixed end of the elastic telescopic pressure block 404. The pressure plate 411 is fixedly installed on the other end of the connecting block 412. When the connecting block 412 moves, it will drive the pressure plate 411 to move downward. When the pressure plate 411 moves, it will drive the rotating plate 410 to rotate. When the rotating plate 410 rotates, it will drive the vertical plate 408 to move inside the sliding groove of the sliding frame 409.

[0022] The slide frame 409 is provided with a slide groove, the bottom of the clamp 403 contacts the fixed end of the elastic telescopic pressure block 404, the flat plate 407 contacts the free end of the elastic telescopic pressure block 404, and the vertical plate 408 contacts the rotating plate 410. When the rotating plate 410 rotates, it drives the vertical plate 408 to move inside the slide groove of the slide frame 409, and when the vertical plate 408 moves, it drives the flat plate 407 to move.

[0023] When this embodiment is working: push the frame 1 to the specified position, place the pipe on the lifting plate 401 on the working plate 2, and weld it through the electric welding device 3. Above the elastic telescopic pressure block 404 inside the lifting plate 401, when the weight of the pipe is appropriate, press the elastic telescopic pressure block 404 downward by manual force. When the elastic telescopic pressure block 404 moves downward, it will exert a downward pressure on the bottom of the clamp 403. When the bottom of the clamp 403 is subjected to the downward pressure, it will rotate in the direction away from the elastic telescopic pressure block 404. When the bottom of the clamp 403 rotates, the upper side of the clamp 403 will rotate in the direction of the pipe due to the action of the block 402. The inner groove surface of the clamp 403 will contact the outer wall of the pipe, exerting a fixed force on the pipe. When the elastic telescopic pressure block 404 moves downward, It will drive the connecting block 412 to move. When the connecting block 412 moves, it will drive the pressure plate 411 to move downward. When the pressure plate 411 moves, it will drive the rotating plate 410 to rotate. When the rotating plate 410 rotates, it will drive the vertical plate 408 to move inside the slide groove of the slide frame 409. When the vertical plate 408 moves, it will drive the flat plate 407 to move. When the flat plate 407 moves, it will limit the elastic telescopic pressure block 404. When the workpiece is processed, the vertical plate 408 is pulled away from the pressure plate 411. When the vertical plate 408 moves, it will drive the flat plate 407 to move. When the flat plate 407 moves, the limit on the elastic telescopic pressure block 404 will be released. When the limit of the elastic telescopic pressure block 404 is released, the elastic force of the elastic telescopic column 405 above the bottom plate 406 will bounce the elastic telescopic pressure block 404 upward.

[0024] See also Figure 1-Figure 8On the basis of the above embodiment, in another embodiment of the present invention, a fixing mechanism is provided at the bottom of the frame 1, and a guiding mechanism is provided at the right side of the frame 1, the fixing mechanism comprises a connecting column 501, a connecting plate 502, a top plate 503, an elastic telescopic rod 504, a nail column 505 and a guide plate 506, one end of the connecting column 501 is fixedly mounted on the bottom of the pressing plate 411, the nail column 505 is fixedly mounted on the other end of the connecting column 501, the top plate 503 is fixedly mounted on the surface of the working plate 2, the fixed end of the elastic telescopic rod 504 is fixedly mounted on the bottom of the top plate 503, the connecting plate 502 is fixedly mounted on the free end of the elastic telescopic rod 504, and the guide plate 506 is slidably mounted inside the frame 1, which is conducive to making parameters such as welding arc length and welding speed more stable, reducing welding parameter fluctuations caused by machine shaking or position changes, and helping to improve the consistency of weld quality. At the same time, it is ensured that the welding gun or electrode moves according to the set welding path, so that the trajectory of the weld is more accurate, and the dimensional accuracy of the welding is improved.

[0025] The fixing mechanism also includes a fan plate 507, an elastic telescopic block 508, a long plate 509 and a grinding plate 510. The fan plate 507 is fixedly installed on the circumferential surface of the nail column 505, the fixed end of the elastic telescopic block 508 is fixedly installed on the bottom of the fan plate 507, the long plate 509 is fixedly installed on the surface of the guide plate 506, and the grinding plate 510 is rotatably installed inside the wheel frame 7. When the fan plate 507 moves, it will drive the elastic telescopic block 508 to move, and when the elastic telescopic block 508 moves, it will drive the guide plate 506 to move downward.

[0026] The connecting plate 502 is fixedly connected to the connecting column 501, the long plate 509 is in contact with the grinding plate 510, and the grinding plate 510 is in contact with the wheel inside the wheel frame 7. When the grinding plate 510 rotates, the wheel inside the wheel frame 7 will be limited, and the machine will be fixed again. When the connecting column 501 moves downward, the other two nail columns 505 will be driven downward by the action of the connecting plate 502.

[0027] The guide mechanism includes a square frame 601, a telescopic rotating shaft 602, a rotating block 603, an elastic telescopic support 604, a ring 605, a guide block 606, a ball 607, a fixed block 608, a limiting block 609 and a fixed rod 610. The square frame 601 is fixedly installed inside the frame 1, the rotating block 603 is fixedly installed at the right bottom of the square frame 601, the telescopic rotating shaft 602 is rotatably installed at the bottom of the rotating block 603, the fixed end of the elastic telescopic support 604 is fixedly installed at the right top of the frame 1, the ring 605 is fixedly installed at the free end of the elastic telescopic support 604, and the fixed rod 610 is fixedly installed at the right top of the frame 1. The fixed block 608 is fixedly installed on the circumferential surface of the ring 605, the guide block 606 is slidably installed on the fixed block 608, the ball 607 is rotatably installed on the bottom of the guide block 606, and the limiting block 609 is fixedly installed on the side of the ring 605 close to the connecting column 501. A through slide groove is opened on the top of the limiting block 609, and the fixed rod 610 is slidably installed inside the through slide groove. It can avoid the situation where the welder needs to frequently stop the welding operation to readjust the position of the pipeline due to rotation due to various factors, thereby reducing the number and time of adjustments during the welding process, thereby improving the welding efficiency.

[0028] The fixed rod 610 is in contact with the telescopic rotating shaft 602, and a No. 1 spring is arranged between the fixed block 608 and the guide block 606. The elastic force coefficient of the elastic telescopic support 604 is lower than the elastic force coefficient of the No. 1 spring. The connecting column 501 is rotatably connected with the telescopic rotating shaft 602. When the connecting column 501 moves, the telescopic rotating shaft 602 will be driven to rotate at the bottom of the rotating block 603 under the square frame 601. When the telescopic rotating shaft 602 moves, the fixed rod 610 will be driven to move under the action of the limiting block 609.

[0029] When this embodiment is working, when it moves downward, it will drive the connecting column 501 to move downward. When the connecting column 501 moves downward, it will drive the nail column 505 to move downward under the guidance of the guide plate 506. When the connecting column 501 moves downward, the other two nail columns 505 will be driven downward by the action of the connecting plate 502. When the nail column 505 moves, the machine will be fixed. When the nail column 505 moves, it will drive the fan plate 507 to move. When the fan plate 507 moves, it will drive the elastic telescopic block 508 to move. When the elastic telescopic block 508 moves When the connecting column 501 moves upward, the elastic telescopic rod 504 under the top plate 503 provides a certain pulling force for the connecting plate 502.

[0030] When the connecting column 501 moves, it will drive the telescopic rotating shaft 602 to rotate at the bottom of the rotating block 603 under the square frame 601. When the telescopic rotating shaft 602 moves, it will drive the fixed rod 610 to move under the action of the limiting block 609, inserting the pipe into the inside of the circular ring 605. The pipe will press the guide block 606 on the fixed block 608 outward. When the pipe enters the inside of the circular ring 605, it can rotate downward with the ball 607. When the pipe rotates to a suitable position, the pipe is pressed down. When the pipe is pressed down, the circular ring 605 will be driven to move downward. Because the elastic coefficient of the No. 1 spring is greater than the elastic coefficient of the elastic telescopic support 604, the guide block 606 will continue to limit the pipe when the circular ring 605 moves. When the circular ring 605 moves, it will squeeze the elastic telescopic support 604. When the fixed rod 610 moves, the pipe will be fixed to prevent the pipe from continuing to rotate.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipe welding device for construction, comprising a frame (1), characterized in that: A working plate (2) is fixedly mounted on the top of the frame (1), an electric welding device (3) is arranged on the right side of the frame (1), a wheel frame (7) is fixedly mounted on the bottom of the frame (1), a wheel is rotatably mounted inside the wheel frame (7), a clamping mechanism is arranged on the top of the working plate (2), a fixing mechanism is arranged on the bottom of the frame (1), and a guiding mechanism is arranged on the right side of the frame (1); The clamping mechanism comprises a lifting plate (401), a block (402), a clamp (403), an elastic telescopic pressure block (404), an elastic telescopic column (405), a bottom plate (406), a flat plate (407), a vertical plate (408) and a sliding frame (409), wherein the lifting plate (401) is fixedly mounted on the top of the working plate (2), the block (402) is fixedly mounted on the top of the lifting plate (401), the clamp (403) is rotatably mounted on a side of the block (402) away from the electric welding device (3), and ... and the clamp (403) is rotatably mounted on a side of the block (402) away from the electric welding device (3). 1) A through slot is provided on the top, the bottom plate (406) is fixedly mounted at the bottom of the through slot, the fixed end of the elastic telescopic column (405) is fixedly mounted on the top of the bottom plate (406), the fixed end of the elastic telescopic pressure block (404) is fixedly mounted on the free end of the elastic telescopic column (405), a placement slot is provided on the top of the working plate (2), the slide frame (409) is fixedly mounted on the top of the placement slot, the vertical plate (408) is slidably mounted in the slide slot, and the flat plate (407) is fixedly mounted on the top of the vertical plate (408).

2. A pipe welding device for construction according to claim 1, characterized in that: The clamping mechanism further comprises a rotating plate (410), a pressing plate (411) and a connecting block (412); the rotating plate (410) is rotatably mounted on the bottom of the placement groove; one end of the connecting block (412) is fixedly mounted on the fixed end of the elastic telescopic pressing block (404); and the pressing plate (411) is fixedly mounted on the other end of the connecting block (412).

3. A pipe welding device for construction according to claim 2, characterized in that: The slide frame (409) is provided with a slide groove, the bottom of the clamp (403) contacts the fixed end of the elastic telescopic pressing block (404), the flat plate (407) contacts the free end of the elastic telescopic pressing block (404), and the vertical plate (408) contacts the rotating plate (410).

4. A pipe welding device for construction according to claim 3, characterized in that: The fixing mechanism comprises a connecting column (501), a connecting plate (502), a top plate (503), an elastic telescopic rod (504), a nail column (505) and a guide plate (506); one end of the connecting column (501) is fixedly mounted on the bottom of the pressing plate (411); the nail column (505) is fixedly mounted on the other end of the connecting column (501); the top plate (503) is fixedly mounted on the surface of the working plate (2); the fixed end of the elastic telescopic rod (504) is fixedly mounted on the bottom of the top plate (503); the connecting plate (502) is fixedly mounted on the free end of the elastic telescopic rod (504); and the guide plate (506) is slidably mounted inside the frame (1).

5. A pipe welding device for construction according to claim 4, characterized in that: The fixing mechanism further comprises a fan plate (507), an elastic telescopic block (508), a long plate (509) and a grinding plate (510); the fan plate (507) is fixedly mounted on the circumferential surface of the nail column (505); the fixed end of the elastic telescopic block (508) is fixedly mounted on the bottom of the fan plate (507); the long plate (509) is fixedly mounted on the surface of the guide plate (506); and the grinding plate (510) is rotatably mounted inside the wheel frame (7).

6. A pipe welding device for construction according to claim 5, characterized in that: The connecting plate (502) is fixedly connected to the connecting column (501), the long plate (509) is in contact with the grinding plate (510), and the grinding plate (510) is in contact with the wheel inside the wheel frame (7).

7. A pipeline welding device for construction according to claim 6, characterized in that: The guide mechanism comprises a square frame (601), a telescopic rotating shaft (602), a rotating block (603), an elastic telescopic support (604), a circular ring (605), a guiding block (606), a ball (607), a fixed block (608), a limiting block (609) and a fixed rod (610); the square frame (601) is fixedly mounted inside the frame (1); the rotating block (603) is fixedly mounted on the right bottom of the square frame (601); the telescopic rotating shaft (602) is rotatably mounted on the bottom of the rotating block (603); the fixed end of the elastic telescopic support (604) is fixedly mounted The frame (1) is mounted on the top right side of the frame, the circular ring (605) is fixedly mounted on the free end of the elastic telescopic support (604), the fixed block (608) is fixedly mounted on the circumferential surface of the circular ring (605), the guide block (606) is slidably mounted on the fixed block (608), the ball (607) is rotatably mounted on the bottom of the guide block (606), the limiting block (609) is fixedly mounted on a side of the circular ring (605) close to the connecting column (501), a through-slide groove is provided on the top of the limiting block (609), and the fixing rod (610) is slidably mounted inside the through-slide groove.

8. A pipeline welding device for construction according to claim 7, characterized in that: The fixed rod (610) is in contact with the telescopic rotating shaft (602), a No. 1 spring is provided between the fixed block (608) and the guide block (606), the elastic coefficient of the elastic telescopic support (604) is lower than the elastic coefficient of the No. 1 spring, and the connecting column (501) is rotatably connected to the telescopic rotating shaft (602).

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