Pipeline joint welding trimming device

Abstract

The invention relates to the technical field of pipeline installation, in particular to a pipeline joint welding and trimming device which comprises an installation table, a welding table, a trimming mechanism and a trimming mechanism. The two sliding platforms are symmetrically arranged on the mounting table in a sliding manner; the pipe fitting clamping mechanism is arranged on the mounting table and used for clamping a pipeline; the hot melting mechanism is arranged on the mounting table in a sliding mode, can slide to the position between the two sliding platforms and is used for conducting hot melting on the pipe fittings on the pipe fitting clamping mechanism; the finishing mechanism comprises a fixing frame, a pressing roller, a roller shaft, a transmission rod and a driving assembly, a round hole allowing the pipeline to penetrate through is formed in the fixing frame, the transmission rod rotates on the fixing frame around the circle center of the round hole, and the pressing roller rotates at the end, close to the circle center, of the transmission rod through the roller shaft; the driving assembly is arranged on the fixing frame, is in transmission connection with the transmission rod and is used for driving the transmission rod to rotate; the adjusting mechanism is arranged on the mounting table, connected with the fixing frame and used for driving the fixing frame to be arranged on the pipeline in a sleeving mode. The method has the effect of reducing pipeline damage.

Description

Technical Field

[0001] This application relates to the technical field of pipeline installation, and in particular to a pipeline joint welding and finishing device. Background Technology

[0002] Thermofusion butt welding technology for polymer pipes (such as PE and PP) is widely used in gas, water supply and drainage fields due to its advantages of good sealing and high strength. This process typically involves heating and softening the end faces of two pipe sections using a welding machine, then applying axial pressure to fuse them together. However, under high pressure, the molten material is prone to radial overflow, forming annular protrusions on the outside of the joint after cooling.

[0003] In the prior art, Chinese Patent Publication No. CN220052917U discloses a pipe heat fusion butt welding device, including a base plate and two sets of symmetrically arranged pipe sleeves disposed on the base plate. A first telescopic rod is fixedly connected to the inner side of the pipe sleeve, and a pressing block is fixedly connected to the movement of the first telescopic rod. A first slot is opened at one end of the pipe sleeve, and a first magnetic ring is fixedly connected to the inner side of the first slot. A second magnetic ring is disposed inside the first slot, and the second magnetic ring is connected to the first magnetic ring by magnetic connection. A scraper is fixedly connected to one side of the second magnetic ring. After the water pipe is heat-fused, excess protrusions will appear at the joint. When the water pipe is pulled out, it passes through the scraper, which automatically scrapes off the excess protrusions.

[0004] However, by using a scraper to remove protrusions, the pipe is prone to tilting when pulled manually, which can damage the pipe. Furthermore, removing protrusions can thin the pipe, affecting its usability. Summary of the Invention

[0005] This application provides a pipe joint welding and finishing device that can solve at least one of the above-mentioned technical problems.

[0006] This application provides a pipe joint welding and finishing device, which adopts the following technical solution: A pipe joint welding and finishing device, comprising: The mounting platform is placed on the ground. Two sliding platforms are symmetrically arranged on the mounting platform. A pipe clamping mechanism is provided on the mounting platform for clamping pipes; A hot-melting mechanism is slidably disposed on the mounting platform and can slide between the two sliding platforms for hot-melting the pipe fittings on the pipe fitting clamping mechanism. The trimming mechanism includes a fixed frame, a pressure roller, a roller shaft, a transmission rod, and a drive assembly. The fixed frame has a circular hole for a pipe to pass through. The transmission rod rotates around the center of the circular hole on the fixed frame. The pressure roller rotates via the roller shaft at one end of the transmission rod near the center. The drive assembly is mounted on the fixed frame and is connected to the transmission rod for driving the transmission rod to rotate. An adjustment mechanism is set on the mounting platform and connected to the fixing frame, used to drive the fixing frame to be sleeved on the pipe.

[0007] By adopting the above technical solution, the pipe is fixed by the pipe fitting clamping mechanism, the hot-melt mechanism moves to the pipe end for heating and softening, the adjustment mechanism drives the fixing frame of the trimming mechanism to fit into the pipe, and pushes the sliding platform so that the two pipe fittings are close to each other, with one end of one pipe fitting inserted into the other end of the other pipe fitting. The drive assembly drives the transmission rod to rotate, so that the pressure roller rolls along the circumference of the weld to apply pressure, resulting in better welding of the pipe fittings. Before the molten material cools, the pressure roller presses the overflow back to the weld, reducing the existence of annular protrusions or warping edges. Roller pressing avoids pipe wall thinning caused by scraping, and the round hole of the fixing frame ensures that the pressure roller is always perpendicular to the pipe wall, eliminating the risk of manual deviation.

[0008] Optionally, the transmission rod is a telescopic rod, which includes a fixed rod, a sliding rod, and a locking bolt. The fixed rod is rotatably mounted on the fixed frame, and a sliding hole is provided on the fixed rod. The sliding rod slides in the sliding hole, and the locking bolt is threaded onto the fixed rod, and the locking bolt can abut against the sliding rod.

[0009] By adopting the above technical solution, the sliding rod adjusts the radial position of the pressure roller to adapt to pipe diameters of Φ50-Φ600mm, thereby improving equipment utilization and enhancing equipment applicability.

[0010] Optionally, a pressure regulating component is provided at the end of the transmission rod. The pressure regulating component includes a fixed block, a sliding block, and an elastic element. The fixed block is disposed at the end of the transmission rod, the sliding block slides on the fixed block along the axis of the transmission rod, and the roller is disposed on the sliding block. The elastic element is disposed on the fixed block and connected to the sliding block, and the elastic element is used to drive the sliding block away from the transmission rod.

[0011] By adopting the above technical solution, pressure self-adaptation and elastic components compensate for pipeline ellipticity errors.

[0012] Optionally, the trimming mechanism further includes a pressure-stopping block, which is disposed on the fixed frame and located on the side of the sliding block away from the transmission rod. The pressure roller initially abuts against the pressure-stopping block, and as the transmission rod rotates, the pressure roller separates from the pressure-stopping block.

[0013] By adopting the above technical solution, the pressure roller initially abuts against the pressure stop block. When the transmission rod rotates, the pressure roller disengages from the pressure stop block, and the elastic element pushes the sliding block to make the pressure roller contact the pipe wall. Gradual pressure is applied to reduce the crushing of the molten zone by excessive initial pressure. The pressure is self-adaptive, and the elastic element compensates for the ellipticity error of the pipe.

[0014] Optionally, guide surfaces are provided at both ends of the pressure-stopping block, with the end of the guide surface away from the middle of the pressure-stopping block approaching the center of the circular hole.

[0015] By adopting the above technical solution and setting the guide surface, the sudden release of elastic force by the elastic element can reduce the sudden compression of the pipeline, thereby reducing the possibility of pipeline denting.

[0016] Optionally, the drive assembly includes a gear ring, a gear, and a motor. The gear ring is rotatably mounted on the fixed frame and rotates around the center of the circular hole. The gear is rotatably mounted on the fixed frame and meshes with the gear ring. The motor is mounted on the fixed frame, and the output shaft of the motor is connected to the gear key.

[0017] By adopting the above technical solution, the motor drives the pressure roller to rotate at a constant speed through a gear ring, thereby achieving automatic roller pressing.

[0018] Optionally, a scraper is provided on the sliding block, and the scraper is located on the back side in the direction of movement of the pressure roller.

[0019] By adopting the above technical solution, after the pressure roller is pressed back, the scraper on the back side of the movement direction cleans up the trace amount of residual overflow. The scraper cuts off after the pressure roller rolls, which can reduce the amount of cutting on the pipe, reduce the possibility of the pipe becoming thinner, reduce damage to the pipe, maintain the welding effect of the pipe, and make the pipe maintain its original pressure resistance.

[0020] Optionally, the sliding platform is further provided with an internal support mechanism, the internal support mechanism comprising: A sliding frame slides on the sliding platform; A movable component is disposed on the sliding platform and connected to the sliding frame; A support rod, mounted on the sliding frame, can extend into the interior of the pipe fitting; Support wheels, mounted on the support rod, are used to support the interior of the pipe fitting.

[0021] By adopting the above technical solution, before hot melting or after pipe welding is completed, the moving component inserts the support rod into the pipe end to support the pipe and reduce the inward folding of the pipe.

[0022] Optionally, multiple support frames are slidably mounted on the support wheel, an abutment wheel is rotatably mounted on the support frame, and an adjusting member is mounted on the support wheel. The adjusting member is connected to the support frame and is used to drive the support frame closer to the inner wall of the pipe.

[0023] By adopting the above technical solution, the adjusting component pushes the support frame, so that the abutment wheel is tightly attached to the inner wall of the pipe. The support wheel is smaller than the inner diameter of the pipe, which facilitates the entry of the support wheel and can maintain a good abutment support force, reducing pipe deformation.

[0024] Optionally, a power assembly is provided on the support rod, and the support wheel is rotatably mounted on the support rod. The power assembly is connected to the support wheel and drives the support wheel to rotate.

[0025] By adopting the above technical solution, the possibility of inward folding can be dynamically eliminated through rotation, and it can be used in conjunction with pressure rollers to improve the welding effect.

[0026] Alternatively, after rotation is complete, the device can slide away from the sliding frame via the moving component and support wheels.

[0027] By adopting the above technical solution, the support wheel moves along the pipeline axis after rotation, which facilitates the improvement of axial welding effect and enhances the connection stability of the pipeline.

[0028] In summary, this application includes at least one of the following beneficial technical effects: The pressure rollers press the overflow material back to the weld before the molten material cools, reducing the presence of annular protrusions or warped edges; the roller pressing avoids thinning of the tube wall caused by scraping, and the round holes of the fixing frame ensure that the pressure rollers are always perpendicular to the tube wall, eliminating the risk of manual skewness; 2. After the pressure roller returns to its original position, the scraper on the back side of the moving direction cleans up any remaining material. The scraper cuts off the material after the pressure roller rolls, which reduces the amount of material cut into the pipe, reduces the possibility of the pipe becoming thinner, reduces damage to the pipe, maintains the welding effect of the pipe, and allows the pipe to maintain its original pressure resistance. 3. The adjusting component pushes the support frame so that the abutment wheel is tightly against the inner wall of the pipe. The support wheel is smaller than the inner diameter of the pipe, which facilitates the entry of the support wheel and can maintain a good abutment support force, reducing pipe deformation. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the welding trimming device in the embodiments of this application; Figure 2 This is a diagram illustrating the sliding platform in an embodiment of this application; Figure 3 This is a diagram showing the location of the internal support mechanism in an embodiment of this application; Figure 4This is a partial structural illustration of the adjustment mechanism in the embodiments of this application; Figure 5 This is a diagram illustrating the hot melt platform in an embodiment of this application; Figure 6 This is a detailed illustration of the trimming mechanism in the embodiments of this application; Figure 7 This is a detailed illustration of the pressure regulating component in the embodiments of this application; Figure 8 This is a diagram illustrating the support wheels in an embodiment of this application; Figure 9 This is a cross-sectional view of the support wheel in an embodiment of this application.

[0030] Reference numerals: 100, mounting platform; 200, sliding platform; 300, pipe clamping mechanism; 310, clamping seat; 320, upper mold; 330, lower mold; 340, second cylinder; 350, support column; 410, hot melt mechanism; 411, first hot melt head; 412, second hot melt head; 413, upright plate; 420, hot melt platform; 430, third cylinder; 440, positioning mechanism; 441, positioning block; 442, positioning plate; 443, positioning groove; 500, trimming mechanism; 510, fixing frame; 520, pressure roller; 530, roller shaft; 540, transmission rod; 541, fixing rod; 542, sliding rod; 543, locking bolt; 550. Drive assembly; 551, gear ring; 552, gear; 553, motor; 560, pressure regulating assembly; 561, fixed block; 562, sliding block; 563, elastic element; 570, pressure-stopping block; 571, guide surface; 580, scraper; 590, rotating ring; 600, adjusting mechanism; 610, fifth cylinder; 620, first feed platform; 630, second feed platform; 640, sixth cylinder; 700, internal support mechanism; 710, sliding frame; 720, moving assembly; 730, support rod; 740, support wheel; 750, support frame; 760, abutment wheel; 770, adjusting element; 780, power assembly; 800, first cylinder. Detailed Implementation

[0031] The following combination Figures 1 to 9 This application will be described in further detail.

[0032] This embodiment discloses a pipe joint welding and trimming device.

[0033] like Figures 1 to 3As shown, this pipe joint welding and finishing device mainly includes a mounting platform 100, two symmetrically sliding platforms 200 mounted on it, a pipe clamping mechanism 300 and an adjusting mechanism 600 on the mounting platform 100, a sliding hot-melt mechanism 410, a finishing mechanism 500, and an internal support mechanism 700 on the sliding platform 200. Its core workflow is as follows: First, the pipe clamping mechanism 300 fixes the two pipe sections to be connected; the hot-melt mechanism 410 slides between the two pipe ends for heating and softening; after softening, the hot-melt mechanism 410 retracts, and the adjusting mechanism 600 drives the finishing mechanism 500 to fit into the pipe; subsequently, the two sliding platforms 200 slide towards each other to complete the pipe alignment (i.e., one pipe end is inserted into the other pipe end), and the finishing mechanism 500 performs roller pressing and finishing on the molten weld; simultaneously, the internal support mechanism 700 can be inserted into the pipe to provide support and prevent inward deformation. The entire process operates in synergy, significantly improving welding quality and efficiency.

[0034] The mounting platform 100 serves as the load-bearing and positioning foundation for the entire device, and is stably placed on the ground. Two sets of guide rails are bolted to the mounting platform, and the two sets of guide rails are arranged in parallel. Two sliding platforms 200 are symmetrically slidable on the upper surface of the mounting platform 100 through the guide rails, and their sliding power is preferably the first cylinder 800. A gap is reserved between the two sliding platforms 200 for the operation of the heat-melting mechanism 410.

[0035] Reference Figures 1 to 4 The clamping mechanism includes multiple lower molds 330, which are bolted or bonded to a sliding platform 200. The lower molds 330 on two sliding platforms 200 are correspondingly arranged. Two support columns 350 are fixedly connected to the ends of the sliding platforms 200, and the two support columns 350 are perpendicular to the sliding platforms 200. The clamping mechanism also includes a clamping seat 310, which has sliding holes. The sliding holes fit onto the support columns 350, allowing the clamping seat 310 to slide and connect to the support columns 350. An upper mold 320 is fixed to the clamping seat 310 by bolts or bonding. The upper mold 320 matches the lower molds 330, and the upper mold 320 and lower mold 330 are connected by a slurry. Rapid prototyping involves installing the mold on the clamping seat 310 or sliding platform 200, filling the mold with slurry, placing the pipe fitting in the slurry, and allowing the slurry to cool and solidify to form a mold for clamping and fixing the pipe fitting. A second cylinder 340 is detachably connected to the support column 350 via bolts. The piston rod of the second cylinder 340 is connected to the clamping seat 310. When the second cylinder 340 extends, it moves the upper mold 320 on the clamping seat 310 closer to the lower mold 330, clamping the pipe fitting between the upper mold 320 and the lower mold 330. Through the extension and retraction of the cylinder, the upper mold 320 is driven to press or release the pipe fitting placed on the lower mold 330, achieving a stable clamping of the pipe.

[0036] Reference Figure 1 and Figure 5A slide rail is provided in the gap area between the two sliding platforms 200 on the mounting platform 100. A hot melt platform 420 that can slide along the slide rail is mounted on the slide rail. A third cylinder 430 is provided on the mounting platform 100. The extension axis of the third cylinder 430 is parallel to the length direction of the slide rail. The piston rod of the third cylinder 430 is connected to the hot melt platform 420. The extension of the third cylinder 430 can drive the hot melt platform 420 to move between the two sliding platforms 200. A positioning mechanism 440 is also provided in this gap area. The positioning mechanism 440 includes a positioning block 441 set on the hot melt platform 420 and a positioning plate 442 set on the mounting platform 100. The positioning plate 442 has a positioning hole, and the positioning block 441 can be inserted into the positioning hole. A sensor is set on the positioning plate 442. When the positioning block 441 moves and is inserted into the positioning hole, the sensor is triggered, controlling the third cylinder 430 to stop extending and retracting, so as to ensure that the hot melt platform 420 stops sliding to the precise heating position.

[0037] The hot-melt mechanism 410 is mounted on the hot-melt platform 420 and can move along the slide rails of the mounting table 100 together with the hot-melt platform 420. It includes a vertical plate 413, a first hot-melt head 411, and a second hot-melt head 412, which are arranged coaxially on the hot-melt platform 420. The first hot-melt head 411 and the second hot-melt head 412 are respectively located on both sides of the vertical plate 413, corresponding to two pipe fittings that need to be fused.

[0038] During operation, the third cylinder 430 drives the hot-melt platform 420 to slide along the slide rail until the positioning mechanism 440 precisely stops it between the two pipe ends to be connected. At this time, the hot-melt surface of the hot-melt mechanism 410 is heating and softening the pipe ends. During the softening process, the first cylinder 800 pushes the sliding platform 200 slowly closer to the hot-melt head to achieve hot-melt welding of the pipe ends. After completion, the first cylinder 800 moves the sliding platform 200 away from the vertical plate 413, and then the third cylinder 430 drives the hot-melt platform 420 to slide in the opposite direction along the slide rail and move it out of the working area.

[0039] Reference Figure 6 and Figure 7The trimming mechanism 500 includes a pressure roller 520, a roller shaft 530, a fixed frame 510, a transmission rod 540, a rotating ring 590, and a drive assembly 550. The fixed frame 510 has a frame structure with a central hole for the pipe to pass through. The fixed frame 510 is connected to the mounting platform 100 via an adjustment mechanism 600 and is located to the side of the pipe clamping mechanism 300. The adjustment mechanism 600 is used to drive the fixed frame 510 to rise and fall, so that its central hole can be accurately fitted into the pipe joint area that has been aligned. The fixed frame 510 has a rotating hole, and the rotating ring 590 is rotatably connected in the rotating hole. The drive assembly 550 is mounted on the fixed frame 510 and connected to the rotating ring 590 to drive the rotating ring 590 to rotate. One end of the transmission rod 540 is detachably connected to the rotating ring 590 by bolts, and the transmission rod 540 extends radially along the rotating ring 590, with its rotation axis passing through the center of the central hole of the fixed frame 510. To accommodate different pipe diameters (e.g., Φ50-Φ600mm), the transmission rod 540 is designed as a telescopic rod structure, specifically including: a fixed rod 541, a sliding rod 542, and a locking bolt 543. The fixed rod 541 is detachably connected to the rotating ring 590 by bolts. A sliding hole is provided on the fixed rod 541, which is opened along the length direction of the fixed rod 541. The sliding rod 542 slides and is nested in the sliding hole of the fixed rod 541. The locking bolt 543 is threaded to the side wall of the fixed rod 541. After tightening, it can press against the sliding rod 542 to achieve fixation. The pressure roller 520 is rotatably mounted on the end of the sliding rod 542 through the roller shaft 530.

[0040] Furthermore, to facilitate adjustment of the contact force between the pressure roller 520 and the pipe fitting, a pressure adjustment assembly 560 is also provided at the end of the sliding rod 542, located at the end of the sliding rod 542 near the center. This assembly includes: a fixed block 561, a sliding block 562, and an elastic element 563, all fixedly connected to the end of the sliding rod 542. The fixed block 561 has an adjustment hole along the length of the sliding rod 542, and the sliding block 562 is slidably connected within the adjustment hole. The pressure roller 520 is rotatably connected to the sliding block 562 via a roller shaft 530. The elastic element 563 is disposed within the adjustment hole and is a spring. One end of the elastic element 563 is connected to the end of the adjustment hole near the sliding rod 542, and the other end is connected to the sliding block 562. Under normal conditions, the elastic element 563 pushes the sliding block 562 to move away from the transmission rod 540.

[0041] Furthermore, to reduce the impact of roller 530 on pipe fitting connection, an extension rod is detachably connected to the fixing frame 510, and a pressure-stopping block 570 is fixedly connected to the extension rod. The pressure-stopping block 570 is located on the side of sliding block 562 away from transmission rod 540 (i.e., facing the center). In the initial state, pressure roller 520 abuts against pressure-stopping block 570 under the action of elastic element 563. Both ends of pressure-stopping block 570 are provided with guide surfaces 571, which gradually slope and contract from the middle of pressure-stopping block 570 towards the center of the circular hole. The positional relationship between pressure-stopping block 570 and pressure roller 520 in the figure is for clear illustration. In actual use, the initial state of pressure roller 520 is abutting against one side of guide surface 571 of pressure-stopping block 570.

[0042] The drive assembly 550 drives the transmission rod 540 (and consequently the pressure roller 520) to rotate around the center of the circular hole. It includes a gear ring 551, a gear 552, and a motor 553. The gear ring 551 is rotatably mounted on the fixed frame 510 via bearings, its axis of rotation coinciding with the axis of the circular hole and connected to the rotating ring 590. The gear 552 is rotatably mounted on the fixed frame 510, meshing with the gear ring 551 and located near the mounting platform. The motor 553 is fixed to the fixed frame 510, and its output shaft is keyed to drive the gear 552 to rotate. When the motor 553 is operational, it drives the transmission rod 540 to rotate at a constant speed via the gear 552-gear ring 551 pair.

[0043] The adjustment mechanism 600 includes a fifth cylinder 610, a first feed platform 620, a second feed platform 630, and a sixth cylinder 640. The fifth cylinder 610 is fixedly connected to the mounting platform 100. The first feed platform 620 is disposed on the piston rod of the fifth cylinder 610. The second feed platform 630 is slidably connected to the first feed platform 620, and the sliding direction is parallel to the sliding direction of the sliding platform 200. The fixing bracket 510 is installed on the second feed platform 630. The sixth cylinder 640 is disposed on the first feed platform 620, and the piston rod is connected to the second feed platform 630.

[0044] Furthermore, in order to reduce small protrusions on the edge, the sliding block 562 is equipped with a scraper 580, which is located on the back side of the pressure roller 520 in the direction of movement, that is, the position that the pressure roller 520 passes through after rolling.

[0045] Reference Figure 8 and Figure 9Furthermore, to reduce the protrusion formed by the internal fold of the pipe fitting, an internal support mechanism 700 is provided on each sliding platform 200. The internal support mechanism 700 includes a sliding frame 710, a moving component 720, a support rod 730, a support frame 750, an abutment wheel 760, a support wheel 740, an adjusting component 770, and a power component 780. The sliding frame 710 is slidably mounted on the sliding platform 200 via a track. The moving component 720 can be a cylinder or a screw-nut mechanism, installed on the sliding platform 200, and its actuating end is connected to the sliding frame 710 to drive the sliding frame 710 to move along the pipe axis. In this embodiment, a fourth cylinder is preferred. The support rod 730 is mounted on the sliding frame 710 via the power component 780, and its axis is parallel to the pipe axis. The support rod 730 can be driven by the moving component 720 to extend into or retract from the pipe fitting. The support wheel 740 is rotatably mounted on the front end (the end extending into the pipe) of the support rod 730 via bearings; to provide reliable radial support, multiple support frames 750 (e.g., 3-4) are evenly distributed around the circumference of the support wheel 740 and are radially slidably mounted on the main body of the support wheel 740; the abutment wheel 760 is rotatably mounted on the outer end of each support frame 750 via a small shaft for direct contact with the inner wall of the pipe; the adjusting element 770, such as a miniature cylinder, electromagnet, or spring, preferably a spring in this embodiment, is mounted on the main body of the support wheel 740 and connected to the support frame 750, for pushing the support frame 750 radially outward so that the abutment wheel 760 tightly abuts against the inner wall of the pipe; the power component 780, such as a small motor 553, is mounted on the sliding frame 710 and connected to the support rod 730 for driving the support wheel 740 to rotate around its own axis.

[0046] Furthermore, in order to better facilitate the welding of the two pipe fittings, after the rotation is completed, the moving component 720 drives the support wheel 740 to move forward, so that the support wheel 740 rotates while making it move slightly along the pipe axis.

[0047] In other embodiments, a small robotic arm-like structure or a universal ball joint may be provided between the support rod 730 and the sliding frame 710 to support the inside of the bend.

[0048] The specific working process of this device is as follows: Clamping and positioning: The two sections of pipe to be connected are placed on the lower mold 330 of the sliding platform 200 on both sides. The cylinder of the pipe clamping mechanism 300 is activated, driving the upper mold 320 to press down and firmly clamp the pipe.

[0049] Hot melt preparation: The cylinder drives the hot melt platform 420 to slide along the slide rail to the position defined by the positioning mechanism 440, and the hot melt mechanism 410 is precisely located between the two pipe ends.

[0050] Heating and softening: The hot melting mechanism 410 operates to heat the heating surfaces at both ends of the tubes until the material reaches a molten and softened state.

[0051] Remove the hot melt mechanism 410: After heating is completed, the first cylinder 800 drives the sliding platform 200 away from the hot melt mechanism 410, and then the third cylinder 430 drives the hot melt platform 420 to slide out of the working area along the slide rail.

[0052] Retraction and insertion of trimming mechanism 500: The first cylinder 800 of the drive sliding platform 200 is activated, causing the two sliding platforms 200 to retract slightly. The adjustment mechanism 600 is activated, driving the fixing frame 510 of trimming mechanism 500 to descend, so that its round hole fits into the joint area of ​​the two pipes.

[0053] Tube alignment and trimming: The cylinder that drives the sliding platform 200 moves again, causing the two sliding platforms 200 to slide towards each other, completing the tube alignment (one tube end is inserted into the other molten tube end).

[0054] Dressing Action: The motor 553 of the dressing mechanism 500 starts, driving the transmission rod 540 to rotate via gear 552-gear ring 551. Initially, the pressure roller 520 rests against the pressure stop block 570. As the transmission rod 540 rotates, the pressure roller 520 smoothly transitions away from the guide surface 571 of the pressure stop block 570, and the elastic element 563 pushes the sliding block 562 (and the pressure roller 520) to contact the pipe wall of the weld area. During rotation, the pressure roller 520 applies uniform and vertical roller pressure to the molten weld. The scraper 580 (if provided) on the back side of the pressure roller 520 then scrapes off a small amount of residual overflow.

[0055] Internal support action: Before, during, or after pipe fitting / trimming, the moving component 720 drives the sliding frame 710 to insert the support rod 730 and the retracted support wheel 740 into the pipe. The adjusting component 770 actuates, pushing the support frame 750 and the abutment wheel 760 to expand radially and tightly abut against the inner wall of the pipe. The power component 780 can drive the support wheel 740 to rotate, while the moving component 720 can make it move slightly axially, providing dynamic, all-around internal support.

[0056] Cooling and Reset: Maintain pressure until the weld seam cools and solidifies. After completion, the trimming mechanism 500 resets and rises, the internal support mechanism 700 retracts and exits the pipe, the pipe clamping mechanism 300 releases, and the connected pipe is removed.

[0057] In summary, this application achieves precise hot-melt alignment. The pressure roller of the trimming mechanism, in cooperation with the elastic element and guide surface, applies progressive and adaptive pressure, ensuring full fusion and adhesion of the molten material. This effectively eliminates annular protrusions and warping, significantly improving sealing performance and strength. A scraper removes residual material in a small amount, avoiding excessive cutting that could damage the pipe wall.

[0058] The internal support mechanism provides strong and uniform internal support through adjustable, rotatable, and axially micro-moving abutment wheels, effectively preventing pipe folding or deformation during welding and cooling processes.

[0059] The hot-melting mechanism automatically positions and retracts, the sliding platform automatically aligns the tubes, the trimming mechanism automatically rolls and presses, and the internal support automatically advances, retreats, and adjusts, greatly improving work efficiency and reducing labor intensity.

[0060] The telescopic design of the transmission rod, the adaptive pressure of the pressure roller, and the adjustability of the internal support enable the device to stably handle pipe joints of various diameters, such as Φ50-Φ600mm.

[0061] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pipe joint welding and finishing device, characterized in that: include: The mounting platform (100) is placed on the ground; Two sliding platforms (200) are symmetrically arranged on the mounting platform (100). A pipe clamping mechanism (300) is disposed on the mounting platform (100) and is used to clamp the pipe; The hot melt mechanism (410) is slidably disposed on the mounting platform (100) and can slide between the two sliding platforms (200) for hot melting the pipe fittings on the pipe fitting clamping mechanism (300); The trimming mechanism (500) includes a fixed frame (510), a pressure roller (520), a roller shaft (530), a transmission rod (540), and a drive assembly (550). The fixed frame (510) has a circular hole for a pipe to pass through. The transmission rod (540) rotates around the center of the circular hole on the fixed frame (510). The pressure roller (520) rotates via the roller shaft (530) at the end of the transmission rod (540) near the center. The drive assembly (550) is mounted on the fixed frame (510) and is connected to the transmission rod (540) for driving the transmission rod (540) to rotate. An adjustment mechanism (600) is provided on the mounting platform (100) and connected to the fixing frame (510) to drive the fixing frame (510) to be fitted onto the pipe.

2. The pipe joint welding and finishing device according to claim 1, characterized in that: The transmission rod (540) is a telescopic rod. The transmission rod (540) includes a fixed rod (541), a sliding rod (542), and a locking bolt (543). The fixed rod (541) is rotatably mounted on the fixed frame (510). A sliding hole is provided on the fixed rod (541). The sliding rod (542) slides in the sliding hole. The locking bolt (543) is threaded onto the fixed rod (541) and can abut against the sliding rod (542).

3. The pipe joint welding and finishing device according to claim 1 or 2, characterized in that: The end of the transmission rod (540) is provided with a pressure regulating component (560). The pressure regulating component (560) includes a fixed block (561), a sliding block (562), and an elastic element (563). The fixed block (561) is disposed at the end of the transmission rod (540). The sliding block (562) slides along the axis of the transmission rod (540) on the fixed block (561). The roller (530) is disposed on the sliding block (562). The elastic element (563) is disposed on the fixed block (561) and connected to the sliding block (562). The elastic element (563) is used to drive the sliding block (562) away from the transmission rod (540).

4. The pipe joint welding and finishing device according to claim 3, characterized in that: The trimming mechanism (500) further includes a pressure stop block (570), which is disposed on the fixed frame (510) and located on the side of the sliding block (562) away from the transmission rod (540). The pressure roller (520) initially abuts against the pressure stop block (570), and as the transmission rod (540) rotates, the pressure roller (520) separates from the pressure stop block (570).

5. The pipe joint welding and finishing device according to claim 4, characterized in that: The pressure relief block (570) has guide surfaces (571) at both ends, with the end of the guide surface (571) away from the middle of the pressure relief block (570) approaching the center of the circular hole.

6. The pipe joint welding and finishing device according to claim 4, characterized in that: The drive assembly (550) includes a gear ring (551), a gear (552), and a motor (553). The gear ring (551) is rotatably mounted on the fixed frame (510) and rotates around the center of the circular hole. The gear (552) is rotatably mounted on the fixed frame (510) and meshes with the gear ring (551). The motor (553) is mounted on the fixed frame (510), and the output shaft of the motor (553) is keyed to the gear (552).

7. The pipe joint welding and finishing device according to claim 3, characterized in that: A scraper (580) is provided on the sliding block (562), and the scraper (580) is located on the back side of the pressure roller (520) in the direction of movement.

8. The pipe joint welding and finishing device according to claim 1, characterized in that: The sliding platform (200) is also provided with an internal support mechanism (700), which includes: The sliding frame (710) slides on the sliding platform (200); A movable component (720) is disposed on the sliding platform (200) and connected to the sliding frame (710); A support rod (730) is mounted on the sliding frame (710) and can extend into the interior of the pipe fitting; A support wheel (740) is mounted on the support rod (730) and is used to support the interior of the pipe fitting.

9. The pipe joint welding and finishing device according to claim 8, characterized in that: Multiple support frames (750) are slidably disposed on the support wheel (740), and an abutment wheel (760) is rotatably disposed on the support frame (750). An adjusting member (770) is disposed on the support wheel (740), and the adjusting member (770) is connected to the support frame (750) to drive the support frame (750) closer to the inner wall of the pipe.

10. The pipe joint welding and finishing device according to claim 9, characterized in that: A power assembly (780) is provided on the support rod (730), and the support wheel (740) is rotatably mounted on the support rod (730). The power assembly (780) is connected to the support wheel (740) and drives the support wheel (740) to rotate.

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