A heat pipe construction butt joint device and method

Abstract

The present application relates to the technical field of pipeline welding, in particular to a heat pipeline construction butt joint device and method, the device comprises two N-shaped frames, a hydraulic rod is connected between the two N-shaped frames, cams are rotatably connected to the top and both sides of the lower part of the two N-shaped frames, the two N-shaped frames are clamped on a first pipeline and a second pipeline to be butt jointed through the bottom openings, the first pipeline and the second pipeline are centered after the rotation of the cams, the hydraulic rod is shortened to pull the end of the first pipeline and the second pipeline close; a welding gun is arranged between the two N-shaped frames, the welding gun can revolve around the butt joint part of the first pipeline and the second pipeline to weld the first pipeline and the second pipeline; the method comprises centering, welding gap adjustment, welding and removing the device; the present application is convenient to assemble and disassemble, suitable for the construction in narrow space in a groove, simplifies the assembly and welding process, improves the construction efficiency and the welding quality.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding technology, specifically to a device and method for connecting thermal pipelines during construction. Background Technology

[0002] In the construction of heating pipeline projects, the pipelines are usually laid in trenches and supported by pads before adjacent pipelines are butt-welded on site. The existing centering welding method involves first adjusting the coaxiality of the two pipelines, then performing preliminary spot welding for positioning, and finally performing full welding. However, the pipeline alignment method usually involves manual alignment with an alignment tool to center the pipe ends and adjust the gap. Therefore, there are problems such as low alignment accuracy, difficulty in ensuring coaxiality, and uneven control of the butt gap, which can easily cause pipeline misalignment and skewing, affecting the welding quality and service life of the pipeline.

[0003] Meanwhile, existing docking devices have limited functionality, only enabling pipe alignment and positioning, and cannot simultaneously complete welding operations. After alignment, the docking device must be disassembled before welding can proceed, resulting in cumbersome procedures, low construction efficiency, and difficulties in disassembly and assembly within the confined space of the trench. Furthermore, traditional methods rely on manual adjustment of pipe positions, leading to high labor intensity and significantly impacting docking accuracy due to human factors, making it difficult to meet the demands for continuous, efficient, and high-quality docking construction of long-distance thermal pipelines. Summary of the Invention

[0004] This invention provides a device and method for connecting and installing thermal pipelines, which solves the problems of limited space and complicated procedures in the welding of laid thermal pipelines in the prior art.

[0005] To alleviate the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0006] A thermal pipeline construction docking device includes two N-shaped frames, a hydraulic rod connecting the two N-shaped frames, and the lateral projections of the two N-shaped frames overlap. Cams are rotatably connected to the top and lower sides of the two N-shaped frames. The two N-shaped frames are respectively engaged with the first and second pipelines to be docked through bottom openings. Three cams on one N-shaped frame first rotate synchronously to grip the corresponding pipeline, and three cams on the other N-shaped frame then rotate synchronously to grip the corresponding pipeline, thereby aligning the first and second pipelines. After the first and second pipelines are aligned, the hydraulic rod shortens, thereby pulling the ends of the first and second pipelines closer together.

[0007] A welding torch is disposed between the two N-shaped frames. The welding torch is capable of revolving around the joint of the first pipe and the second pipe, thereby welding the first pipe and the second pipe.

[0008] Furthermore, an arc-shaped cylinder is provided between the two N-shaped frames, and the rotation points of the three cams on the N-shaped frames are equidistant from the center of the arc-shaped cylinder;

[0009] An arc-shaped rod is slidably connected inside the arc-shaped cylinder. The welding torch is installed at the end of the arc-shaped rod. Guide slide rods are fixedly connected to both the arc-shaped cylinder and the arc-shaped rod. Arc-shaped grooves that cooperate with the guide slide rods are opened on the opposite surfaces of the two N-shaped frames. After the arc-shaped rod extends completely out of the arc-shaped cylinder, the arc-shaped cylinder and the arc-shaped rod slide synchronously along the trajectory of the arc-shaped groove, thereby allowing the welding torch to revolve around the joint of the first pipe and the second pipe for welding.

[0010] Furthermore, an electric rotating rod is rotatably connected to the inner arc surface of the arc-shaped cylinder. A first gap gauge is fixedly connected to the middle of the electric rotating rod, and multiple second gap gauges are rotatably connected to both sides of the first gap gauge. The first gap gauge is made of rigid material, and the second gap gauges are made of flexible material. When the electric rotating rod rotates, it can release the first gap gauge and the second gap gauges between the first pipe and the second pipe, thereby controlling the gap between the first pipe and the second pipe.

[0011] When the electric rotating rod rotates, it can first drive the first gap ruler to swing and disengage from the second gap rulers on both sides. Then the electric rotating rod continues to rotate to drive the first gap ruler and the second gap ruler to swing synchronously and approach the inner arc surface of the arc-shaped cylinder.

[0012] Furthermore, a drive rod is provided on the first gap ruler near the electric rotating rod, and an arc-shaped through groove is provided on the second gap ruler to cooperate with the drive rod. When the first gap ruler and the second gap ruler swing to the drooping state, the drive rod is located in the middle of the arc-shaped through groove. When the first gap ruler swings and approaches the inner arc surface of the arc-shaped cylinder, the drive rod can slide to the end of the arc-shaped through groove, so that the continued swing of the first gap ruler can drive the second gap ruler to swing synchronously.

[0013] Furthermore, a rotating cylinder is fixedly connected to the second gap gauge, and the arc-shaped through groove is formed in the rotating cylinder;

[0014] The rotating drum can slide axially relative to the electric rotating rod, so that the drive rod can be inserted into or pulled out of the arc-shaped through slot, thereby changing the number of the second gap gauges involved in the gap adjustment.

[0015] Furthermore, the second gap ruler is magnetic, so that the second gap ruler can be magnetically attracted to the arc-shaped cylinder and the first gap ruler.

[0016] Furthermore, one of the N-shaped frames is equipped with three drive wheels, a rotating shaft is fixedly connected to the drive wheel, a drive motor is connected to the rotating shaft, a pin is fixedly connected to the drive motor, the pin is inserted into the N-shaped frame, a tension spring is connected between the pin cap of the pin and the N-shaped frame, the N-shaped frame is provided with a sliding groove that cooperates with the rotating shaft, the extension direction of the sliding groove is towards the center of the arc-shaped cylinder, and the drive wheel that contacts the arc-shaped cylinder is pushed by the arc-shaped cylinder and slides along the axial direction of the pin;

[0017] The three drive wheels are started sequentially. The first drive wheel starts to drive the arc-shaped rod to move out of the arc-shaped cylinder. The drive wheel in the direction of the arc-shaped rod's movement then starts. The two drive wheels together drive the arc-shaped cylinder and the arc-shaped rod to slide along the arc-shaped groove. When the arc-shaped cylinder is sliding, the last drive wheel starts, so that the three drive wheels drive the welding torch to revolve around the joint of the first pipe and the second pipe.

[0018] Furthermore, a rotating ring is rotatably connected to the cam.

[0019] Furthermore, a mounting ring is fixedly connected to the end of the arc-shaped rod, the welding torch is inserted into the mounting ring, and an electric telescopic rod is connected between the welding torch and the mounting ring. The electric telescopic rod extends as the rotation angle of the cam increases.

[0020] A method for connecting and installing a thermal pipeline, using a thermal pipeline connection and installation device, includes the following steps:

[0021] The bottom openings of the two N-shaped frames connected by hydraulic rods are respectively snapped onto the first pipe and the second pipe. According to the width of the weld gap, a first gap ruler and two or more second gap rulers are swung down into the gap between the first pipe and the second pipe, so that one side of the second gap ruler contacts the pipe opening of the first pipe or the second pipe that needs to be welded.

[0022] First, control the rotation of three cams on the N-shaped frame in the contact direction of the second gap ruler so that the three cams rotating synchronously and at equal angles fix the corresponding pipes. Then, the three cams on another N-shaped frame rotate to fix another pipe. Since the lateral projections of the two N-shaped frames coincide, the two pipes can be on the same axis when both the first and second pipes are fixed.

[0023] The hydraulic rod then shortens, pulling the two N-shaped frames closer together. This causes the two N-shaped frames to bring the first and second pipes closer together for assembly. The hydraulic rod stops shortening when the other pipe also contacts the second clearance gauge.

[0024] The friction between the first gap gauge and the second gap gauges on both sides is small. When the electric rotating rod rotates, the first gap gauge moves out of the space between the second gap gauges on both sides. As a result, the two second gap gauges lose their support and can deform and bend. This allows the first gap gauge and multiple second gap gauges to move out of the space between the first pipe and the second gap gauges, thus avoiding the need for subsequent welding.

[0025] Adjust the distance between the welding torch and the gap to be welded to a suitable level. First, control the arc rod to extend out of the arc cylinder. At this time, the arc rod first drives the welding torch to revolve around the welding gap. After the arc rod is fully extended, maintain the state of the arc rod extending out of the arc cylinder. Then, the arc cylinder and the arc rod move synchronously along the trajectory of the arc groove to ensure that the welding torch can revolve around the welding gap once.

[0026] After the welding torch completes one revolution, it stops welding. The arc-shaped cylinder continues to slide along the arc-shaped groove to its initial position. Then, the arc-shaped rod is retracted into the arc-shaped cylinder, at which point the welding torch is reset and the welding is completed.

[0027] By controlling the multiple cams on the two N-shaped brackets to rotate in opposite directions, the fixing of the first and second pipes is released, the device is removed from the welded pipes, and then the hydraulic rod is controlled to extend and reset, preparing for the welding of the next section of pipe.

[0028] The beneficial effects of this invention are analyzed as follows:

[0029] The bottom openings of the two N-shaped brackets of this device are aligned with the first and second pipes respectively, allowing them to engage. The two N-shaped brackets are positioned on either side of the welding area of ​​the first and second pipes. Using the axis of the first pipe as a reference, the three cams on the corresponding N-shaped bracket are first rotated to clamp the first pipe. Then, the three cams on the other N-shaped bracket are rotated to clamp the second pipe. During the clamping and fixing of the second pipe, it is simultaneously aligned with the first pipe, thus completing the alignment of the first and second pipes. Subsequently, the hydraulic rod is shortened, causing the two N-shaped brackets to move closer together, pulling the first and second pipes closer together to a suitable distance for subsequent welding operations. After these actions are completed, the welding torch is controlled to revolve around the joint of the first and second pipes, thereby completing the welding assembly of the first and second pipes. This device is easy to assemble and disassemble, suitable for construction in confined spaces within trenches, improves the coaxiality and gap control accuracy of pipe connections, simplifies the assembly and welding process, and improves construction efficiency and weld quality. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure in use of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the present invention when it is snapped into a pipe;

[0032] Figure 3 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the cam in this invention;

[0034] Figure 5 This is a schematic diagram of the structure of the arc-shaped cylinder of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the electric rotary rod of the present invention;

[0036] Figure 7 This is a schematic diagram of the gap ruler of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the drive rod and the arc-shaped through groove of the present invention;

[0038] Figure 9 This is a schematic diagram of the synchronous sliding state of the arc-shaped cylinder and the arc-shaped rod of the present invention;

[0039] Figure 10 This is a schematic diagram of the structure of the drive motor in this invention.

[0040] In the diagram: 100, groove; 110, pad block; 120, first pipe; 130, second pipe; 200, N-shaped frame; 210, cam; 220, rotating ring; 230, hydraulic rod; 240, connecting lug; 300, arc-shaped cylinder; 310, arc-shaped rod; 320, guide slide rod; 330, arc-shaped slide groove; 340, drive wheel; 341, rotating shaft; 342, drive motor; 343, pin; 344, tension spring; 350, mounting ring; 360, welding torch; 370, electric telescopic rod; 400, electric rotating rod; 410, first gap gauge; 420, second gap gauge; 421, rotating cylinder; 422, arc-shaped through groove; 430, drive rod. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Examples, such as Figures 1-10As shown, a thermal pipeline construction docking device includes two N-shaped frames 200, with a hydraulic rod 230 connecting the two N-shaped frames 200. The lateral projections of the two N-shaped frames 200 overlap. Cams 210 are rotatably connected to the top and lower sides of the two N-shaped frames 200. The two N-shaped frames 200 are respectively engaged with the first pipeline 120 and the second pipeline 130 to be docked through bottom openings. The three cams 210 on one N-shaped frame 200 first rotate synchronously to grip the corresponding pipeline. The other N-shaped frame 200... The three cams 210 on the 00 then rotate synchronously to grip the corresponding pipes, thereby aligning the first pipe 120 and the second pipe 130. After the first pipe 120 and the second pipe 130 are aligned, the hydraulic rod 230 shortens, thereby pulling the ends of the first pipe 120 and the second pipe 130 closer together. A welding torch 360 is provided between the two N-shaped frames 200. The welding torch 360 can revolve around the docking part of the first pipe 120 and the second pipe 130, thereby welding the first pipe 120 and the second pipe 130.

[0043] During construction, a trench 100 for laying the heating pipes is dug in the ground. A pad 110 is placed inside the trench 100 to support the pipes, creating a gap between the pipes and the ground. Of the pipes to be connected, the first pipe 120 is laid first, and the second pipe 130 is laid later. The bottom openings of the two N-shaped brackets 200 of the device are aligned with the first pipe 120 and the second pipe 130, respectively, and inserted. The two N-shaped brackets 200 are positioned on either side of the welding area of ​​the first pipe 120 and the second pipe 130. Using the axis of the first pipe 120 as a reference, the corresponding... The three cams 210 on the N-shaped frame 200 rotate to clamp the first pipe 120. Then, the three cams 210 on the other N-shaped frame 200 are rotated to clamp the second pipe 130. During the clamping and fixing of the second pipe 130, the second pipe 130 is simultaneously corrected to a position coaxial with the first pipe 120, thereby completing the alignment of the first pipe 120 and the second pipe 130. Then, the hydraulic rod 230 is shortened, so that the two N-shaped frames 200 move closer to each other, pulling the first pipe 120 and the second pipe 130 closer to each other at a suitable distance, which facilitates subsequent welding operations.

[0044] After the above actions are completed, the welding torch 360 is controlled to revolve around the joint of the first pipe 120 and the second pipe 130, thereby completing the welding assembly of the first pipe 120 and the second pipe 130;

[0045] The two symmetrical cams 210 located at the lower part of the N-shaped bracket 200 are fully retracted into the inner wall of the opening of the N-shaped bracket 200 in the initial state, thereby ensuring that the N-shaped bracket 200 can be stably locked on the pipe. The N-shaped bracket 200 is shaped as an upper semi-circle, with the two lower sides parallel to each other, and the two sides are tangent to the upper semi-circle.

[0046] Multiple cams 210 are driven by individual servo motors to rotate synchronously and at equal angles. The rotation points of multiple cams 210 are equidistant from the center of the upper semicircle of the N-shaped frame 200, thereby ensuring that the pipe can be concentric with the upper semicircle of the N-shaped frame 200 when it is clamped.

[0047] In addition, when the two cams 210 at the bottom of the N-shaped bracket 200 rotate, they move from the bottom of the pipe toward the pipe and hold the pipe tightly, thereby preventing the pipe from being pushed away from the upper semi-circular center position of the N-shaped bracket 200.

[0048] Each of the two N-shaped brackets 200 is provided with a number of corresponding connecting ears 240, and a hydraulic rod 230 is connected between each pair of corresponding connecting ears 240 to ensure that the driving force of the two pipes approaching each other can be balanced.

[0049] An arc-shaped cylinder 300 is provided between two N-shaped frames 200. The rotation points of the three cams 210 on the N-shaped frame 200 are equidistant from the center of the arc-shaped cylinder 300. An arc-shaped rod 310 is slidably connected inside the arc-shaped cylinder 300. The welding torch 360 is installed at the end of the arc-shaped rod 310. Guide slide rods 320 are fixedly connected to both the arc-shaped cylinder 300 and the arc-shaped rod 310. Arc-shaped grooves 330 that cooperate with the guide slide rods 320 are opened on the opposite surfaces of the two N-shaped frames 200. After the arc-shaped rod 310 is fully extended out of the arc-shaped cylinder 300, the arc-shaped cylinder 300 and the arc-shaped rod 310 slide synchronously along the trajectory of the arc-shaped grooves 330, so that the welding torch 360 revolves around the docking part of the first pipe 120 and the second pipe 130 for welding.

[0050] The centers of the trajectories of the arc-shaped cylinder 300 and the arc-shaped rod 310 coincide. The arc-shaped groove 330 is a circular trajectory with a notch. Multiple guide rods 320 are present on the arc-shaped cylinder 300, and one guide rod 320 is installed on the arc-shaped rod 310. The guide rod 320 of the arc-shaped rod 310 is located at its end extending out of the arc-shaped cylinder 300. During pipe welding, the arc-shaped cylinder 300 is initially stationary. At this time, the arc-shaped rod 310 extends out of the arc-shaped cylinder 300, thus the arc-shaped rod 310 first drives the welding torch 360 to revolve around the welding seam. After the arc-shaped rod 310 is fully extended, it remains extended. At this time, the arc-shaped cylinder 300 and the arc-shaped rod 310 move in tandem. The welding torch 360 slides along the arc-shaped groove 330, allowing it to continue revolving around the welding seam. When the guide rod 320 on the arc-shaped rod 310 slides out of the arc-shaped groove 330, the multiple guide rods 320 on the arc-shaped cylinder 300 remain within the arc-shaped groove 330, ensuring the welding torch 360 revolves stably. As the arc-shaped cylinder 300 and the arc-shaped rod 310 continue to move, the guide rods 320 on the arc-shaped rod 310 can re-enter the arc-shaped groove 330. At this time, some of the multiple guide rods 320 on the arc-shaped cylinder 300 are still within the arc-shaped groove 330, ensuring the stability of the movement trajectory of the arc-shaped cylinder 300 and the arc-shaped rod 310.

[0051] Both N-shaped brackets 200 have arc-shaped grooves 330. The two ends of multiple guide rods 320 slide within the two arc-shaped grooves 330 respectively. There is a magnetic attraction between the arc-shaped grooves 330 on the N-shaped bracket 200 that fixes the first pipe 120 and the guide rods 320. Alternatively, a pin cap can be provided at the end of the guide rod 320 at this end, preventing that end of the guide rod 320 from sliding axially relative to the arc-shaped groove 330. The end of the guide rod 320 facing the second pipe 130 can be freely inserted into the arc-shaped groove of the corresponding N-shaped bracket 200. The guide slide rod 320 has a large length and a large corresponding arc-shaped groove 330. This ensures that when the hydraulic rod 230 is shortened, the relative position of the guide slide rod 320 and the N-shaped bracket 200 corresponding to the first pipe 120 does not change, while the other end can slide axially relative to the N-shaped bracket 200 corresponding to the second pipe 130. This ensures that the movement of the welding torch 360 is not interfered with, and at the same time, the shortening of the hydraulic rod 230 is not interfered with, ensuring that the mutual approach of the first pipe 120 and the second pipe 130 is not affected.

[0052] An electric rotating rod 400 is rotatably connected to the inner arc surface of the arc-shaped cylinder 300. A first gap gauge 410 is fixedly connected to the middle of the electric rotating rod 400. Multiple second gap gauges 420 are rotatably connected to both sides of the first gap gauge 410. The first gap gauge 410 is made of rigid material, and the second gap gauges 420 are made of flexible material. When the electric rotating rod 400 rotates, it can release the first gap gauge 410 and the second gap gauges 420 to the space between the first pipe 120 and the second pipe 130, thereby controlling the gap between the first pipe 120 and the second pipe 130. When the electric rotating rod 400 rotates, it can first drive the first gap gauge 410 to swing and disengage from the contact with the second gap gauges 420 on both sides. Then, the electric rotating rod 400 continues to rotate to drive the first gap gauge 410 and the second gap gauge 420 to swing synchronously and approach the inner arc surface of the arc-shaped cylinder 300.

[0053] The first gap gauge 410 is used in conjunction with at least two second gap gauges 420, and these two second gap gauges 420 need to be positioned on either side of the first gap gauge 410. After selecting the combination of the first gap gauge 410 and the second gap gauge 420, the subsequent assembly operation is performed. When assembling the pipes, after the N-shaped bracket 200 is placed, the cam 210 is not controlled to rotate. At this time, the control device moves as a whole, so that the second gap gauge 420 near the first pipe 120 is in contact with the port of the first pipe 120. Then, after maintaining this state of contact between the second gap gauge 420 and the port of the first pipe 120, the cam 210 is controlled to rotate. After the cams 210 on the two N-shaped frames 200 are rotated in sequence, the first pipe 120 and the second pipe 130 are aligned. Then, the hydraulic rod 230 is shortened. At this time, the first pipe 120 and the second pipe 130 move closer to each other. Since the first pipe 120 and the corresponding N-shaped frame 200 have been fixed, the relative position of the gap ruler and the first pipe 120 does not change. That is, the shortening of the hydraulic rod 230 will drive the second pipe 130 to move closer to the gap ruler. The port of the second pipe 130 is in contact with the gap ruler by manual observation or by setting a structure similar to the audible edge finder on the CNC machine tool.

[0054] After the second pipe 130 contacts the gap gauge, the shortening of the hydraulic rod 230 is stopped. At this time, the gap between the first pipe 120 and the second pipe 130 is adjusted to a suitable welding distance. After the weld adjustment is completed, the electric rotating rod 400 is controlled to rotate. The electric rotating rod 400 drives the first gap gauge 410 to swing closer to the N-shaped frame 200. The friction between the first gap gauge 410 and the second gap gauge 420 is small. Therefore, the first gap gauge 410 moves out of the space between the two second gap gauges 420. Then, the space between the two second gap gauges 420 loses its support, so the second gap gauge 420 can bend and deform, making it easier for the second gap gauge 420 to move out of the space between the first pipe 120 and the second pipe 130.

[0055] A drive rod 430 is provided on the first gap ruler 410 near the electric rotating rod 400. An arc-shaped through groove 422 that cooperates with the drive rod 430 is provided on the second gap ruler 420. When the first gap ruler 410 and the second gap ruler 420 swing to the drooping state, the drive rod 430 is located in the middle of the arc-shaped through groove 422. When the first gap ruler 410 swings and approaches the inner arc surface of the arc-shaped cylinder 300, the drive rod 430 can slide to the end of the arc-shaped through groove 422, so that the first gap ruler 410 can drive the second gap ruler 420 to swing synchronously when it continues to swing.

[0056] After the electric rotary rod 400 rotates and releases the first gap gauge 410 and the second gap gauge 420, the first gap gauge 410 and the second gap gauge 420 can hang down between the first pipe 120 and the second pipe 130. Manually controlling the first gap gauge 410 and the second gap gauge 420 to align, the drive rod 430 is at the middle position of the arc-shaped through groove 422. When the electric rotary rod 400 rotates, causing the first gap gauge 410 to move out between the two second gap gauges 420, the drive rod 430 can slide relative to the arc-shaped through groove 422. During this process, the first gap gauge 410 may cause the second gap gauge 420 to swing, but... Due to the friction between the second gap gauge 420 and the first pipe 120 and the second pipe 130, the swing angle of the second gap gauge 420 is lower than that of the first gap gauge 410. As a result, the drive rod 430 can slide to the end of the arc-shaped through groove 422. After the drive rod 430 slides to the end of the arc-shaped through groove 422, the electric rotating rod 400 continues to rotate, which enables the first gap gauge 410 to drive the second gap gauges 420 on both sides to swing synchronously. This allows the first gap gauge 410 and the multiple second gap gauges 420 to eventually swing away from the first pipe 120 and the second pipe 130, thereby avoiding the subsequent welding.

[0057] A rotating cylinder 421 is fixedly connected to the second gap gauge 420, and an arc-shaped through groove 422 is opened in the rotating cylinder 421. The rotating cylinder 421 can slide axially relative to the electric rotating rod 400 so that the drive rod 430 can be inserted into or pulled out of the arc-shaped through groove 422, thereby changing the number of second gap gauges 420 involved in gap adjustment.

[0058] Depending on the welding requirements, different numbers of second gap gauges 420 are selected to participate in the gap adjustment between the first pipe 120 and the second pipe 130. The second gap gauges 420 that are not in use slide relative to the electric rotating rod 400 by pulling the rotating cylinder 421 at their end, so that the drive rod 430 is pulled out of the arc-shaped through groove 422. Thus, when the electric rotating rod 400 rotates, it will not drive the corresponding second gap gauge 420 to swing through the drive rod 430, so that the second gap gauge 420 does not participate in the subsequent gap adjustment work.

[0059] The second gap ruler 420 is magnetic, so that the second gap ruler 420 can be magnetically attracted to the arc-shaped cylinder 300 and the first gap ruler 410.

[0060] Since the first gap gauge 410 can be magnetically attracted to the second gap gauge 420, the first gap gauge 410 can overlap with multiple second gap gauges 420 during the subsequent process of the first pipe 120 and the second pipe 130 approaching each other, thus ensuring the stability of the gap adjustment between pipes.

[0061] The second gap ruler 420 has a magnetic attraction with the arc-shaped cylinder 300. When the electric rotating rod 400 rotates, it will not cause the second gap ruler 420 to move to fit against the inner arc surface of the arc-shaped cylinder 300. Therefore, after the electric rotating rod 400 swings to the point where the first gap ruler 410 is reset, there is still a gap between the second gap ruler 420 and the inner arc surface of the arc-shaped cylinder 300. The distance of this gap makes the second gap ruler 420 fall within the magnetic attraction range that allows it to be magnetically attracted to the inner arc surface of the arc-shaped cylinder 300. Thus, under the action of the magnetic attraction, the second gap ruler 420 can be completely reset and fit against the inner arc surface of the arc-shaped cylinder 300.

[0062] Three drive wheels 340 are mounted on one of the N-shaped frames 200. A rotating shaft 341 is fixedly connected to each drive wheel 340. A drive motor 342 is connected to the rotating shaft 341. A pin 343 is fixedly connected to the drive motor 342. The pin 343 is inserted into the N-shaped frame 200. A tension spring 344 connects the pin cap of the pin 343 to the N-shaped frame 200. A groove is formed on the N-shaped frame 200 that mates with the rotating shaft 341. The groove extends towards the center of the arc-shaped cylinder 300. The drive wheel 340 in contact with the arc-shaped cylinder 300 is subjected to pressure from the arc-shaped cylinder 300. The pin 343 is pushed and slides along its axial direction. The three drive wheels 340 are started in sequence. The first drive wheel 340 drives the arc rod 310 to move out of the arc cylinder 300. The drive wheel 340 in the direction of the arc rod 310's movement is then started. The two drive wheels 340 jointly drive the arc cylinder 300 and the arc rod 310 to slide along the arc groove 330. When the arc cylinder 300 is sliding, the last drive wheel 340 is started, so that the three drive wheels 340 drive the welding torch 360 to revolve around the docking part of the first pipe 120 and the second pipe 130.

[0063] After the weld seam is adjusted to the required width, the drive wheel 340 at the top of the N-shaped frame 200 rotates first. At this time, the drive wheel 340 drives the arc rod 310 to slide out of the arc cylinder 300. Then, the arc rod 310 first drives the welding torch 360 to revolve around the weld seam. After the arc rod 310 is fully extended, the drive wheel 340 in the direction of the arc rod 310 extension begins to rotate. Then, the last drive wheel 340 also begins to rotate, and the three drive wheels 340 rotate at the same speed. Then, the three rotating drive wheels 340 jointly drive the arc cylinder 300 and the arc rod 310 to slide along the trajectory of the arc groove 330. During this process, at least two guide rods 320 are in the arc groove 330, thereby ensuring that the movement trajectory of the arc cylinder 300 and the arc rod 310 does not change, and ensuring that the welding torch 360 revolves stably.

[0064] The drive wheel 340, the arc rod 310, and the arc cylinder 300 can be engaged by teeth or by anti-slip texture to ensure that the drive wheel 340 can stably drive the arc cylinder 300 and the arc rod 310 to move.

[0065] In the initial state, the drive wheel 340 in contact with the arc-shaped cylinder 300 does not rotate, thus restricting the arc-shaped cylinder 300 from moving in the initial state and ensuring that the arc-shaped rod 310 slides out of the arc-shaped cylinder 300 stably. After the arc-shaped rod 310 has completely slid out of the arc-shaped cylinder 300, there are always at least two drive wheels 340 driving the arc-shaped cylinder 300 and the arc-shaped rod 310 to move respectively, thereby ensuring that there is no more relative sliding between the arc-shaped rod 310 and the arc-shaped cylinder 300 in the subsequent process.

[0066] Since the outer diameter of the arc-shaped cylinder 300 is larger than the outer diameter of the arc-shaped rod 310, when the drive wheel 340 switches from the position of engaging the arc-shaped rod 310 to the position of engaging the arc-shaped cylinder 300, the drive wheel 340 needs to slide radially to adjust its position and prevent jamming. The end of the arc-shaped cylinder 300 is provided with a rounded corner or an inclination angle for transition, so that the drive wheel 340 can roll along the inclination angle or rounded corner to the outer arc surface of the arc-shaped cylinder 300. The pin 343 and the groove on the N-shaped frame 200 cooperate to restrict the sliding direction of the drive wheel 340. The tension spring 344 provides driving force for the drive wheel 340, so that the drive wheel 340 can make stable contact with the arc-shaped rod 310. When the arc-shaped cylinder 300 contacts the drive wheel 340 later, the pin 343 can overcome the tension of the tension spring 344 and slide, thereby allowing the drive wheel 340 to move radially and make contact with the outer arc surface of the arc-shaped cylinder 300.

[0067] The drive motor 342 is used to provide rotational driving force for the rotating shaft 341, so that the rotating shaft 341 can drive the drive wheel 340 to rotate.

[0068] After welding is completed, depending on the winding of the wire harness on the welding torch 360, multiple drive wheels 340 can be selectively controlled to rotate in the opposite direction. After the arc-shaped cylinder 300 slides back to its initial position, the drive wheels 340 in contact with the arc-shaped cylinder 300 stop rotating, ensuring that the position of the arc-shaped cylinder 300 is fixed. The remaining drive wheels 340 continue to rotate, and the drive arc rod 310 stops rotating after retracting into the arc-shaped cylinder 300, thereby resetting the welding torch 360. The wire harness on the welding torch 360 will not interfere with the subsequent disengagement of the device from the pipeline.

[0069] A rotating ring 220 is rotatably connected to the cam 210.

[0070] The rotating ring 220 can rotate relative to the cam 210. When the cam 210 rotates and fixes the pipe, the rotating ring 220 contacts the outer wall of the pipe. Thus, when the cam 210 continues to rotate and fix the pipe, the rotating ring 220 can rotate relative to the cam 210, avoiding direct contact between the cam 210 and the pipe surface to prevent friction and scratches on the outer wall of the pipe.

[0071] An installation ring 350 is fixedly connected to the end of the arc-shaped rod 310. The welding torch 360 is inserted into the installation ring 350. An electric telescopic rod 370 is connected between the welding torch 360 and the installation ring 350. The electric telescopic rod 370 extends as the rotation angle of the cam 210 increases.

[0072] When welding pipes of different diameters, the welding torch 360 needs to change the distance between itself and the pipe. Initially, the welding torch 360 is in the position furthest from the pipe, and the cam 210 is in its initial position. At this time, the diameter of the pipe to be welded by the welding torch 360 is equal to the diameter of the upper arc trajectory of the N-shaped frame 200. If the pipe diameter is small, multiple cams 210 need to rotate a large angle to grip the pipe. At this time, the electric telescopic rod 370 will shorten synchronously, thereby driving the welding torch 360 to move closer to the pipe. The shortening distance of the electric telescopic rod 370 and the rotation angle of the cam 210 can be controlled by an interpolation function. By setting an angle sensor to detect the rotation angle of the cam 210, each rotation angle of the cam 210 corresponds to a telescopic amount of the electric telescopic rod 370, thus ensuring that the distance between the welding torch 360 and the pipe during the gripping process can match the diameter of the pipe.

[0073] A method for connecting and installing a thermal pipeline, using a thermal pipeline connection and installation device, includes the following steps:

[0074] The bottom openings of the two N-shaped brackets 200 connected by the hydraulic rod 230 are respectively snapped onto the first pipe 120 and the second pipe 130. According to the width of the weld gap, select a first gap ruler 410 and two or more second gap rulers 420 and swing them vertically into the gap between the first pipe 120 and the second pipe 130, so that one side of the second gap ruler 420 contacts the pipe opening of the first pipe 120 or the second pipe 130 that needs to be welded.

[0075] First, the three cams 210 on the N-shaped frame 200 in the contact direction of the second gap ruler 420 are rotated, so that the three cams 210 rotating synchronously and at equal angles fix the corresponding pipes. Then, the three cams 210 on another N-shaped frame 200 rotate to fix another pipe. Since the lateral projections of the two N-shaped frames 200 coincide, the two pipes can be on the same axis when the first pipe 120 and the second pipe 130 are both fixed.

[0076] Subsequently, the hydraulic rod 230 shortens, pulling the two N-shaped frames 200 closer to each other, thereby causing the two N-shaped frames 200 to bring the first pipe 120 and the second pipe 130 closer together for assembly. When the other pipe also contacts the second gap ruler 420, the hydraulic rod 230 stops shortening.

[0077] The friction between the first gap gauge 410 and the second gap gauges 420 on both sides is small. When the electric rotating rod 400 rotates, the first gap gauge 410 moves out of the space between the second gap gauges 420 on both sides. As a result, the two second gap gauges 420 lose their support and can deform and bend. This allows the first gap gauge 410 and multiple second gap gauges 420 to move out of the space between the first pipe 120 and the second gap gauges 420, thus avoiding the space for subsequent welding.

[0078] Adjust the distance between the welding torch 360 and the gap to be welded to a suitable level. First, control the arc rod 310 to extend out of the arc cylinder 300. At this time, the arc rod 310 first drives the welding torch 360 to revolve around the welding gap. After the arc rod 310 is fully extended, maintain the state of the arc rod 310 extending out of the arc cylinder 300. Then, the arc cylinder 300 and the arc rod 310 move synchronously along the trajectory of the arc groove 330 to ensure that the welding torch 360 can revolve around the welding gap once.

[0079] After the welding torch 360 completes one revolution, the welding torch 360 stops welding. The arc-shaped cylinder 300 continues to slide along the arc-shaped groove 330 to the initial position. Then, the arc-shaped rod 310 is controlled to retract into the arc-shaped cylinder 300. At this time, the welding torch 360 is reset and the welding is completed.

[0080] The multiple cams 210 on the two N-shaped brackets 200 are controlled to rotate in opposite directions, releasing the fixation on the first pipe 120 and the second pipe 130, removing the device from the welded pipe, and then controlling the hydraulic rod 230 to extend and reset, preparing for the welding of the next section of pipe.

[0081] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for connecting and installing thermal pipelines, characterized in that: The device includes two N-shaped frames (200), with a hydraulic rod (230) connecting the two N-shaped frames (200). The side projections of the two N-shaped frames (200) overlap. Cams (210) are rotatably connected to the top and lower sides of the two N-shaped frames (200). The two N-shaped frames (200) are respectively engaged with the first pipe (120) and the second pipe (130) to be connected through bottom openings. The three cams (210) on one of the N-shaped frames (200) first rotate synchronously to grip the corresponding pipe, and the three cams (210) on the other N-shaped frame (200) then rotate synchronously to grip the corresponding pipe, thereby aligning the first pipe (120) and the second pipe (130). After the first pipe (120) and the second pipe (130) are aligned, the hydraulic rod (230) shortens, thereby pulling the ends of the first pipe (120) and the second pipe (130) closer together. A welding torch (360) is provided between the two N-shaped frames (200). The welding torch (360) can revolve around the docking part of the first pipe (120) and the second pipe (130) to weld the first pipe (120) and the second pipe (130). An arc-shaped cylinder (300) is provided between the two N-shaped frames (200), and the rotation points of the three cams (210) on the N-shaped frame (200) are equidistant from the center of the arc-shaped cylinder (300); An arc-shaped rod (310) is slidably connected inside the arc-shaped cylinder (300). The welding torch (360) is installed at the end of the arc-shaped rod (310). Guide slide rods (320) are fixedly connected to both the arc-shaped cylinder (300) and the arc-shaped rod (310). Arc-shaped grooves (330) that cooperate with the guide slide rods (320) are opened on the opposite surfaces of the two N-shaped frames (200). After the arc-shaped rod (310) is fully extended out of the arc-shaped cylinder (300), the arc-shaped cylinder (300) and the arc-shaped rod (310) slide synchronously along the trajectory of the arc-shaped grooves (330), so that the welding torch (360) revolves around the docking part of the first pipe (120) and the second pipe (130) for welding. An electric rotating rod (400) is rotatably connected to the inner arc surface of the arc-shaped cylinder (300). A first gap ruler (410) is fixedly connected to the middle of the electric rotating rod (400). Multiple second gap rulers (420) are rotatably connected to both sides of the first gap ruler (410). The first gap ruler (410) is made of rigid material, and the second gap rulers (420) are made of flexible material. When the electric rotating rod (400) rotates, it can release the first gap ruler (410) and the second gap rulers (420) to the gap between the first pipe (120) and the second pipe (130), thereby controlling the gap between the first pipe (120) and the second pipe (130). When the electric rotating rod (400) rotates, it can first drive the first gap ruler (410) to swing and disengage from the second gap rulers (420) on both sides. Then the electric rotating rod (400) continues to rotate to drive the first gap ruler (410) and the second gap ruler (420) to swing synchronously and approach the inner arc surface of the arc-shaped cylinder (300).

2. The thermal pipeline construction docking device according to claim 1, characterized in that: A drive rod (430) is provided on the first gap ruler (410) near the electric rotating rod (400). An arc-shaped through groove (422) is provided on the second gap ruler (420) to cooperate with the drive rod (430). When the first gap ruler (410) and the second gap ruler (420) swing to the drooping state, the drive rod (430) is located in the middle of the arc-shaped through groove (422). When the first gap ruler (410) swings and approaches the inner arc surface of the arc-shaped cylinder (300), the drive rod (430) can slide to the end of the arc-shaped through groove (422), so that the continued swing of the first gap ruler (410) can drive the second gap ruler (420) to swing synchronously.

3. The thermal pipeline construction docking device according to claim 2, characterized in that: A rotating cylinder (421) is fixedly connected to the second gap gauge (420), and the arc-shaped through groove (422) is opened in the rotating cylinder (421). The rotating drum (421) can slide axially relative to the electric rotating rod (400) so that the drive rod (430) can be inserted into or pulled out of the arc-shaped through slot (422), thereby changing the number of the second gap gauges (420) involved in the gap adjustment.

4. The thermal pipeline construction docking device according to claim 3, characterized in that: The second gap ruler (420) is magnetic, so that the second gap ruler (420) can be magnetically attracted to the arc-shaped cylinder (300) and the first gap ruler (410).

5. The thermal pipeline construction docking device according to claim 1, characterized in that: One of the N-shaped frames (200) is equipped with three drive wheels (340). A rotating shaft (341) is fixedly connected to the drive wheel (340). A drive motor (342) is connected to the rotating shaft (341). A pin (343) is fixedly connected to the drive motor (342). The pin (343) is inserted into the N-shaped frame (200). A tension spring (344) is connected between the pin cap of the pin (343) and the N-shaped frame (200). The N-shaped frame (200) is provided with a sliding groove that cooperates with the rotating shaft (341). The extension direction of the sliding groove points to the center of the arc-shaped cylinder (300). The drive wheel (340) that is in contact with the arc-shaped cylinder (300) is pushed by the arc-shaped cylinder (300) and slides along the axial direction of the pin (343). The three drive wheels (340) are started sequentially. The first drive wheel (340) starts to drive the arc rod (310) to move out of the arc cylinder (300). The drive wheel (340) in the direction of movement of the arc rod (310) starts subsequently. The two drive wheels (340) jointly drive the arc cylinder (300) and the arc rod (310) to slide along the arc groove (330). When the arc cylinder (300) is sliding, the last drive wheel (340) starts, so that the three drive wheels (340) drive the welding torch (360) to revolve around the docking part of the first pipe (120) and the second pipe (130).

6. The thermal pipeline construction docking device according to claim 1, characterized in that: A rotating ring (220) is rotatably connected to the cam (210).

7. The thermal pipeline construction docking device according to claim 2, characterized in that: An installation ring (350) is fixedly connected to the end of the arc-shaped rod (310). The welding torch (360) is inserted into the installation ring (350). An electric telescopic rod (370) is connected between the welding torch (360) and the installation ring (350). The electric telescopic rod (370) extends as the rotation angle of the cam (210) increases.

8. A method for connecting and installing a thermal pipeline during construction, using the thermal pipeline connection and installation device described in claim 4, characterized in that... Includes the following steps: The bottom openings of two N-shaped brackets (200) connected by a hydraulic rod (230) are respectively snapped onto the first pipe (120) and the second pipe (130). According to the width of the weld gap, a first gap ruler (410) and two or more second gap rulers (420) are swung vertically into the gap between the first pipe (120) and the second pipe (130), so that one side of the second gap ruler (420) contacts the pipe opening of the first pipe (120) or the second pipe (130) that needs to be welded. First, the three cams (210) on the N-shaped frame (200) in the contact direction of the second gap ruler (420) are rotated, so that the three cams (210) rotating synchronously and at equal angles fix the corresponding pipes. Then, the three cams (210) on another N-shaped frame (200) rotate to fix another pipe. Since the lateral projections of the two N-shaped frames (200) coincide, the two pipes can be on the same axis when the first pipe (120) and the second pipe (130) are both fixed. Subsequently, the hydraulic rod (230) shortens, pulling the two N-shaped frames (200) closer to each other, thereby the two N-shaped frames (200) drive the first pipe (120) and the second pipe (130) closer to each other for assembly. When the other pipe also contacts the second gap ruler (420), the hydraulic rod (230) stops shortening. The friction between the first gap gauge (410) and the second gap gauges (420) on both sides is small. When the electric rotating rod (400) rotates, the first gap gauge (410) moves out of the space between the second gap gauges (420) on both sides. As a result, the two second gap gauges (420) lose their support and can deform and bend. This causes the first gap gauge (410) and multiple second gap gauges (420) to move out of the space between the first pipe (120) and the second gap gauges (420), thus avoiding the need for subsequent welding. Adjust the distance between the welding torch (360) and the gap to be welded to a suitable level. First, control the arc rod (310) to extend out of the arc cylinder (300). At this time, the arc rod (310) first drives the welding torch (360) to revolve around the welding gap. After the arc rod (310) is fully extended, maintain the state of the arc rod (310) extending out of the arc cylinder (300). Then, the arc cylinder (300) and the arc rod (310) move synchronously along the trajectory of the arc groove (330) to ensure that the welding torch (360) can revolve around the welding gap once. After the welding torch (360) has completed one revolution, the welding torch (360) stops welding. The arc-shaped cylinder (300) continues to slide along the arc-shaped groove (330) to the initial position. Then, the arc-shaped rod (310) is controlled to retract into the arc-shaped cylinder (300). At this time, the welding torch (360) is reset and the welding is completed. Controlling multiple cams (210) on the two N-shaped brackets (200) to rotate in opposite directions releases the fixation on the first pipe (120) and the second pipe (130), removes the device from the welded pipe, and then controls the hydraulic rod (230) to extend and reset, preparing for the welding of the next section of pipe.

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