An electric power engineering pipeline installation welding device

Abstract

This invention discloses a welding device for power engineering pipeline installation, belonging to the field of power engineering construction technology. The device includes a workbench, two opposing clamping mechanisms, and a welding trolley. Each clamping mechanism comprises a fixed half-ring and a rotating half-ring, which can be opened and closed to form a circular structure via a locking mechanism. The inner wall of the fixed half-ring has a replaceable support frame, and the top of the rotating half-ring has an adjusting screw for pressing the pipeline. The fixed and rotating half-rings have an arc-shaped track and an arc-shaped rack on the side closest to the welding trolley, which, when closed, form a complete circular track and annular rack. The welding trolley spans between the two clamping mechanisms and can move in a circular motion along the circular track, driving the welding torch to complete the welding around the stationary pipeline. This invention adopts an openable clamping structure, eliminating the need to insert the welding torch from the end of the pipeline, keeping the pipeline stationary to prevent weld misalignment, facilitating easy installation of the welding trolley, providing high centering accuracy, and making it suitable for on-site welding operations of metal power pipelines.

Description

Technical Field

[0001] This invention relates to the technical field, specifically to a welding equipment for pipeline installation in power engineering. Background Technology

[0002] Due to their high mechanical strength, good pressure resistance, and long service life, power pipelines are widely used in cable protection and laying in power engineering. During the construction of power pipelines, it is usually necessary to weld multiple sections of metal pipelines together on-site to form a continuous pipeline line.

[0003] Power pipeline construction often takes place in complex conditions such as narrow trenches in the field and high-altitude operations. This requires welding equipment that is portable, quick to assemble, precisely aligned, and does not require pipe rotation. It must also be adaptable to welding scenarios where pipes are already partially laid and fixed at both ends. Currently, the following technical problems commonly exist in on-site welding of metal pipelines in power engineering: Heavy-duty robotic welding equipment offers high precision but is bulky and weighs several tons, making it impossible to access narrow trenches; while simple V-shaped support blocks combined with manual welding are portable, they suffer from significant misalignment errors, resulting in unstable welding quality and defects such as misalignment and porosity; some equipment uses a pipe rotation and welding torch fixing welding mode, which is prone to rotational slippage and radial runout in large-diameter metal pipes due to their weight, and cannot be used on already laid or fixed pipes, limiting its applicability; and integral welding rings need to be inserted from the pipe end, which is unusable for pipes already hoisted into place or partially buried underground, requiring re-hoisting and adjustment, significantly reducing construction efficiency.

[0004] The aforementioned problems are all reflected in existing patented technologies, but have not been effectively solved. For example, Chinese invention patent CN111730282B discloses a straight seam welding device for metal power pipes, which achieves welding by driving the pipe to rotate synchronously through a bracket binding mechanism. Although this solution solves the problem of pipe slippage during rotation, it still adopts a pipe rotation welding method, which cannot avoid radial runout caused by the pipe's own weight, and is completely unsuitable for scenarios where pipes have already been laid and fixed. Another example is patent application CN119658297A, which discloses a pipe welding device for power engineering. After the pipe is fixed by left and right clamping components, the welding components weld around the pipe. However, this device adopts an integral welding ring structure, which must be inserted from the end of the pipe, making it unsuitable for pipes with both ends already fixed. Furthermore, the equipment is a fixed design and lacks portable transport capability.

[0005] Therefore, designing a pipe installation welding equipment that is easy to install, ensures coaxiality of the weld, and improves welding efficiency is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a welding equipment for power engineering pipeline installation, which solves the technical problems of inconvenient installation of welding rings, easy displacement of pipelines during rotation, and low efficiency due to dispersed processes in existing technologies.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: a power engineering pipeline installation and welding equipment, comprising a workbench, and further comprising:

[0010] Two clamping mechanisms are arranged opposite each other. Each clamping mechanism includes a fixed base, which is slidably connected to the top of the worktable and can move along the length of the worktable.

[0011] Each of the clamping mechanisms also includes a fixed half-ring and a rotating half-ring that can be opened and combined to form a circular structure. Both the fixed half-ring and the rotating half-ring are provided with an arc track on one side. After the rotating half-ring and the fixed half-ring are closed, the two arc tracks are spliced ​​together to form a complete circular track.

[0012] A welding carriage is disposed between the two clamping mechanisms and rolls in cooperation with the arc-shaped track. The welding carriage moves in a circular motion around the circular track. A welding torch is mounted on the welding carriage for performing circumferential welding on the pipe joint during the movement.

[0013] Furthermore, both the fixed half-ring and the rotating half-ring are provided with an arc-shaped rack on one side. After the rotating half-ring and the fixed half-ring are closed, the two arc-shaped racks are spliced ​​together to form a complete ring rack. The welding trolley is provided with a drive motor and a gear set that meshes with the arc-shaped rack. The drive motor drives the gear set to rotate, thereby driving the welding trolley to move along a circular track.

[0014] Furthermore, the gear set includes a first gear and a second gear. The first gear meshes with an arc-shaped rack of a clamping mechanism, and the second gear meshes with an arc-shaped rack of another clamping mechanism, thereby achieving dual-side synchronous drive and smoother movement.

[0015] Furthermore, the welding trolley is equipped with a guide rail connecting wheel assembly, which includes multiple rollers that roll against the outer surface, inner surface, and end face of the arc-shaped track, respectively, to limit the axial movement of the welding trolley and ensure accurate welding position.

[0016] Furthermore, the inner wall of the fixed semi-ring is provided with at least two support frames for supporting the pipe from below; the rotating semi-ring is provided with an adjustable clamping element for clamping the fixed pipe from above.

[0017] Furthermore, each of the clamping mechanisms is provided with a locking structure for locking and fixing the closed fixed half ring and the rotating half ring to ensure clamping rigidity.

[0018] Furthermore, the locking structure includes a first fixed seat and a second fixed seat respectively located at the free ends of the fixed half-ring and the rotating half-ring, as well as a cam rotatably mounted on the first fixed seat. The first fixed seat has a limit hole at its top, and the second fixed seat has a pressure plate and a limit block that can move up and down at its top. When the cam presses down on the pressure plate, the limit block is inserted into the limit hole of the first fixed seat to achieve locking.

[0019] Furthermore, the welding trolley is provided with a sliding connecting seat, and the second gear is mounted on the sliding connecting seat via a rotating shaft; the sliding connecting seat can slide relative to the welding trolley and is provided with a spring to keep the second gear in mesh with the corresponding arc-shaped rack, which facilitates quick installation and compensates for assembly errors.

[0020] Furthermore, the welding trolley is equipped with a fine-tuning mechanism for adjusting the movement of the welding torch along the pipeline axis to achieve precise alignment of the weld seam.

[0021] Furthermore, the workbench is provided with an auxiliary support frame for supporting the pipe and keeping it horizontal.

[0022] (III) Beneficial Effects

[0023] This invention provides a welding device for power engineering pipeline installation, which has the following advantages:

[0024] 1. The clamping mechanism adopts an opening and closing structure with a fixed half ring and a rotating half ring hinged together. It can be opened and closed quickly through the locking structure. When inserting the pipe, simply open the rotating half ring and close and lock it after insertion. There is no need to insert it from the end of the pipe. It is suitable for pipe scenarios that have been laid or whose ends have been fixed.

[0025] 2. The welding carriage is straddled between the arc-shaped tracks of the two clamping mechanisms. It moves in a circular motion along the circular track through gear and rack transmission, driving the welding torch to circle the pipe to complete the welding. The pipe remains stationary during the welding process, avoiding the weld quality problems caused by pipe displacement in the traditional rotary welding method.

[0026] 3. The second guide rail connecting wheel of the welding trolley achieves axial floating through a sliding connecting seat and a spring. During installation, simply insert the fixed side connecting wheel into one side of the rail, compress the spring to align the floating side connecting wheel with the other side of the rail, and release it so that the spring automatically tensions to make the connecting wheel fit against the rail. The operation is convenient and can adapt to processing and assembly errors.

[0027] 4. Two support frames with a 120° angle are set on the inner wall of the fixed semi-ring. Together with the pressure plate at the top of the rotating semi-ring, they form a three-point centering structure to ensure that the pipe axis coincides with the center of the ring. In addition, the support frames can be replaced with different lengths to adapt to pipes of different diameters.

[0028] 5. The welding carriage is equipped with a fine-tuning mechanism, which can finely adjust the position of the welding gun along the pipeline axis to achieve precise alignment of the weld and improve welding quality. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram showing the installation status of the power pipeline according to the present invention;

[0031] Figure 3 This is a schematic diagram of the clamping state of the power pipeline according to the present invention;

[0032] Figure 4 This is a schematic diagram of the overall structure of the clamping mechanism of the present invention;

[0033] Figure 5 This is a schematic diagram of the clamping mechanism of the present invention in its unfolded state;

[0034] Figure 6 This is a schematic diagram of the structure of the adjusting device of the present invention;

[0035] Figure 7 This is a schematic diagram of the overall structure of the welding carriage of the present invention;

[0036] Figure 8 This is a schematic diagram of the disassembly of the welding trolley of the present invention;

[0037] Figure 9 This is a schematic diagram of the disassembly of the welding trolley from another perspective of the present invention;

[0038] Figure 10 This is a schematic diagram of the locking structure of the present invention;

[0039] Figure 11 This is a schematic diagram of the fine-tuning mechanism of the present invention.

[0040] In the diagram: 1 - worktable; 101 - cavity;

[0041] 2-T type slide rail;

[0042] 3-Clamping mechanism; 301-Fixed base; 302-Fixed half-ring; 303-Rotating half-ring; 304-Locking structure; 3041-Fixed seat one; 3042-Fixed seat two; 3043-Sliding hole; 3044-Sliding rod; 3045-Pressure seat; 3046-Fixed shaft; 3047-Cam; 3048-Operating handle; 3049-Pressure plate; 30410-Connecting rod; 30411-Limiting block; 30412-Limiting hole; 30413-Reset spring; 305-Connecting seat; 306-Support frame; 307-Adjusting screw; 308-Pressure plate; 309-First adjusting handwheel; 3010-Arc-shaped track; 3011-Arc-shaped rack; 3012-Receiving cavity;

[0043] 4-Adjusting device; 401-Adjusting screw; 402-Second adjusting handwheel; 403-Damping ring II; 404-Drive block II;

[0044] 5-Welding carriage; 501-Fixing plate; 502-Dual-shaft output reducer; 503-Drive motor; 504-Rotating seat one; 505-Rotating seat two; 506-First drive shaft; 507-Second drive shaft; 508-First gear; 509-Sliding connecting seat; 5010-Second guide rail connecting wheel; 5011-Rotating shaft; 5012-Second gear; 5013-Spline; 5014-Spline groove; 5015-Spring; 5 016-First guide rail connecting wheel; 5017-Fine adjustment mechanism; 50171-Fixed box; 50172-Fine adjustment screw; 50173-Damping ring one; 50174-Fine adjustment knob; 50175-Drive block one; 50176-Groove; 5018-Moving seat; 5019-Welding torch holder; 5020-Welding torch; 5021-Reinforcing rib; 5022-Slide groove; 5023-T-shaped fixing groove; 5024-T-shaped fixing piece;

[0045] 6-Supporting leg;

[0046] 7-Fixed connector;

[0047] 8-Auxiliary support frame;

[0048] 9-Electric power pipelines. Detailed Implementation

[0049] 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.

[0050] Please see Figures 1-11The present invention provides a welding equipment for power engineering pipeline installation, including a workbench 1, two clamping mechanisms 3 and a welding trolley 5.

[0051] The workbench 1 has a rectangular frame structure, and the bottom of the workbench 1 is fixedly connected to the support legs 6, which are used to support the workbench on the ground or construction platform.

[0052] Two parallel T-shaped slide rails 2 are fixed on the top of the workbench 1. The length direction of the T-shaped slide rails 2 is parallel to the length direction of the workbench 1. Two opposing clamping mechanisms 3 are provided on the surface of the T-shaped slide rails 2. Each clamping mechanism 3 includes a fixed base 301. The fixed base 301 is slidably connected to the surface of the T-shaped slide rail 2 on the top of the workbench 1. The clamping mechanism 3 can move along the length direction of the workbench 1. A slider that slides with the T-shaped slide rail 2 is fixed at the bottom of the fixed base 301 of the clamping mechanism 3.

[0053] The top two sides of the workbench 1 are also fixed with fixed connecting seats 7, and auxiliary support frames 8 are inserted into the fixed connecting seats 7. The auxiliary support frames 8 have at least two different length specifications and are used in conjunction with the support frame 306 in the clamping mechanism 3 to support the middle part of the pipe and keep the pipe horizontal.

[0054] The workbench 1 has a scale line along its length on one side, and the clamping mechanism 3 has a pointer corresponding to the scale line, which makes it easy for the operator to read the movement position of the clamping mechanism.

[0055] like Figure 6 As shown, a cavity 101 is provided inside the worktable 1. Each clamping mechanism 3 is provided with an independent adjustment device 4. The adjustment device 4 includes an adjustment screw 401 disposed in the cavity 101 along the length of the worktable. The adjustment screw 401 is rotatably connected to the worktable 1 through a bearing. One end of the adjustment screw 401 extends to the outside of the worktable 1 and is fixed with a second adjustment handwheel 402. A damping ring 403 is provided between the adjustment screw 401 and the worktable 1 to provide appropriate rotational damping and prevent the adjustment screw from rotating on its own when not in operation. A drive block 404 is threadedly connected to the adjustment screw 401. The top end of the drive block 404 extends upward through the top of the worktable 1 and is fixedly connected to the bottom of the fixed base 301 of the corresponding clamping mechanism 3. The surface of the worktable 1 is provided with a strip-shaped hole adapted to the drive block 404. When the operator rotates the second adjusting handwheel 402, the adjusting screw 401 rotates, and the second driving block 404 moves axially along the adjusting screw 401, thereby driving the clamping mechanism 3 to slide along the T-shaped slide rail 2.

[0056] like Figure 4 and Figure 5As shown, each clamping mechanism 3 further includes a fixed half-ring 302, a rotating half-ring 303, and a locking structure 304. The fixed half-ring 302 has a semi-circular structure, and its bottom is fixed to the top of the fixed base 301. The rotating half-ring 303 has a semi-circular structure symmetrical to the fixed half-ring 302. One side of the rotating half-ring 303 is rotatably connected to one side of the fixed half-ring 302 via a connecting pin. The axial direction of the connecting pin is parallel to the length direction of the worktable 1, allowing the rotating half-ring 303 to open outward for easy insertion of pipes. The locking structure 304 is located on the other side of the rotating half-ring 303 and the fixed half-ring 302, and is detachably fixedly connected. When the two are locked, they form a complete circular structure.

[0057] Two connecting seats 305 are fixed to the inner wall of the fixed semi-ring 302. The two connecting seats 305 are symmetrically arranged at a 120° angle. A support frame 306 is detachably installed in each connecting seat 305 by bolts. The upper end face of the support frame 306 is used to support the pipe. Since power pipes have different diameters, the support frame 306 has at least two different length specifications to accommodate pipes of different diameters. When the pipe diameter is large, a shorter support frame is selected to make the center of the pipe coincide with the center of the ring; when the pipe diameter is small, a longer support frame is selected. By replacing the support frame with different lengths, it can be ensured that the axis of pipes of different specifications coincides with the central axis of the ring structure, achieving precise alignment.

[0058] The top of the rotating half-ring 303 is threadedly connected to an adjusting screw 307. The top of the rotating half-ring 303 is provided with a corresponding threaded hole. The lower end of the adjusting screw 307 is rotatably connected to a pressure plate 308 through a thrust bearing. The bottom surface of the pressure plate 308 presses against the top of the outer wall of the pipe. A rubber anti-slip pad can be attached to the surface of the pressure plate 308.

[0059] The upper end of the adjusting screw 307 is fixed with a first adjusting handwheel 309, which makes it convenient for the operator to rotate the adjusting screw. The top of the rotating half ring 303 is provided with a receiving cavity 3012 that is adapted to the pressure plate 308. When the pressure plate 308 rises to the highest position, it can be completely stored in the receiving cavity 3012.

[0060] Both the fixed half-ring 302 and the rotating half-ring 303 have an arc-shaped track 3010 and an arc-shaped rack 3011 fixed on the side near the other clamping mechanism 3. The arc-shaped track 3010 and the arc-shaped rack 3011 are both semi-circular arcs and are concentrically arranged with the half-rings. When the fixed half-ring 302 and the rotating half-ring 303 are locked together, the two arc-shaped tracks 3010 are spliced ​​into a complete circular track, and the two arc-shaped racks 3011 are spliced ​​into a complete annular rack.

[0061] like Figure 10As shown, the locking structure 304 includes a first fixed seat 3041 fixed to the free end of the fixed half-ring 302 and a second fixed seat 3042 fixed to the free end of the rotating half-ring 303. A sliding hole 3043 is horizontally opened in the first fixed seat 3041, and a sliding rod 3044 is slidably installed in the sliding hole 3043. The sliding rod 3044 can move axially along the sliding hole 3043. A pressure seat 3045 is fixed to the outer end of the sliding rod 3044. A cam 3047 is rotatably connected to the pressure seat 3045 via a fixed shaft 3046, and an operating handle 3048 is fixed to the cam 3047.

[0062] A pressure plate 3049 is vertically slidably mounted on the second fixed base 3042. A connecting rod 30410 is vertically fixedly connected to the bottom of the pressure plate 3049. A limit block 30411 is fixedly connected to the bottom end of the connecting rod 30410. A limit hole 30412 adapted to the limit block 30411 is provided on the top of the first fixed base 3041. A return spring 30413 is provided between the pressure plate 3049 and the second fixed base 3042. A pressure plate groove adapted to the pressure plate 3049 is provided on the surface of the second fixed base 3042. A spring mounting groove adapted to the return spring 30413 is vertically provided in the pressure plate groove. The return spring 30413 provides an upward return force to the pressure plate 3049, causing the limit block 30411 to separate from the limit hole 30412.

[0063] When the rotating half-ring 303 is closed, the second fixed seat 3042 is stacked on top of the first fixed seat 3041. The operator pushes the pressure seat 3045 to make the slide rod 3044 slide into the slide hole 3043. At this time, the cam 3047 moves to directly above the pressure plate 3049. The operator rotates the operating handle 3048 to rotate the cam 3047. The protruding part of the cam 3047 presses down on the pressure plate 3049. The pressure plate 3049 moves downward against the elastic force of the return spring 30413, driving the connecting rod 30410 and the limiting block 30411 to move downward, so that the limiting block 30411 is inserted into the limiting hole 30412, thereby achieving positioning and clamping. When unlocking, the operator rotates the operating handle 3048 in the opposite direction. The return spring 30413 pushes the pressure plate 3049 upward, and the limiting block 30411 exits the limiting hole 30412, thus opening the rotating half-ring 303.

[0064] like Figures 7 to 9 As shown, the welding trolley 5 is positioned between two clamping mechanisms 3 and can move around the circumference of the pipe along the assembled circular track to achieve welding around the pipe.

[0065] The welding trolley 5 includes a fixed plate 501, a drive motor 503 fixed on the fixed plate 501, a gear set that is connected to the drive motor 503 and meshes with the arc-shaped rack 3011, and a guide rail connecting wheel set that rolls with the arc-shaped track 3010.

[0066] The drive motor 503 is a servo motor. The output end of the drive motor 503 is connected to a dual-axis output reducer 502. The top of the fixed plate 501 is located on both sides of the dual-axis output reducer 502, and a rotating seat 1 504 and a rotating seat 2 505 are fixedly connected to it respectively. A first transmission shaft 506 is rotatably connected inside the rotating seat 2 505, and a second transmission shaft 507 is rotatably connected inside the rotating seat 1 504. One end of the first transmission shaft 506 and the second transmission shaft 507 are respectively connected to the two output ends of the dual-axis output reducer 502 through a coupling.

[0067] The gear set includes a first gear 508 and a second gear 5012. The guide rail connecting wheel set includes a first guide rail connecting wheel 5016 arranged on the same side as the first gear 508 and a second guide rail connecting wheel 5010 arranged on the same side as the second gear 5012. The first guide rail connecting wheel 5016 and the second guide rail connecting wheel 5010 roll in cooperation with the circular rails on the clamping mechanisms 3 on both sides. The first guide rail connecting wheel 5016 and the second guide rail connecting wheel 5010 each include three rollers: an upper pressure roller, a lower support roller, and two side rollers, which roll against the outer surface, inner surface, and end face of the circular rail, respectively. The rollers on the outer surface and inner surface ensure that the welding carriage can roll circumferentially along the rail, while the rollers on the end face restrict the swaying of the welding carriage along the axial direction of the pipe, ensuring that the welding carriage moves smoothly.

[0068] The top of the second guide rail connecting wheel 5010 is fixedly connected to a sliding connecting seat 509, which is slidably connected to the fixed plate 501. A rotating shaft 5011 is rotatably connected inside the sliding connecting seat 509. A first gear 508 is fixed to one end of the first transmission shaft 506, and a second gear 5012 is fixed to one end of the rotating shaft 5011. The first gear 508 and the second gear 5012 are meshed with the arc-shaped rack 3011 on the clamping mechanisms 3 on both sides.

[0069] The other end of the rotating shaft 5011 is provided with a spline 5013. The end of the second transmission shaft 507 near the rotating shaft 5011 is provided with a spline groove 5014 that is adapted to the spline 5013. The spline 5013 is slidably inserted into the spline groove 5014. A spring 5015 is provided in the spline groove 5014, and one end of the spring 5015 abuts against the end face of the rotating shaft 5011.

[0070] The sliding connector 509 has sliding grooves 5022 on both sides that are adapted to the fixed plate 501, so that the sliding connector 509 can slide along the length direction of the fixed plate 501, i.e., the axial direction of the pipe. The top of the fixed plate 501 is provided with T-shaped fixing grooves 5023 on both sides of the sliding connector 509. T-shaped fixing members 5024 adapted to the T-shaped fixing grooves 5023 are provided on both sides of the sliding connector 509. When the sliding connector 509 slides into place, it can be locked and fixed by the T-shaped fixing members 5024.

[0071] When installing the welding trolley 5, first insert the first guide rail connecting wheel 5016 into one side of the track, pull the sliding connecting seat 509 to the right to compress the spring 5015, align it with the other side of the track and then release it. The spring 5015 will automatically insert the second guide rail connecting wheel 5010 into the right side track. Finally, use the fixing part 5024 to lock the position of the sliding connecting seat 509.

[0072] The top two sides of the fixed plate 501 are fixedly connected with reinforcing ribs 5021, and the surface of the reinforcing ribs 5021 is provided with sliding grooves;

[0073] like Figure 11 As shown, the welding carriage 5 also includes a fine-tuning mechanism 5017. The fine-tuning mechanism 5017 includes a fixed box 50171 fixed to the bottom of the fixed plate 501, a fine-tuning screw 50172 rotatably installed in the fixed box 50171, and a drive block 50175 threadedly connected to the fine-tuning screw 50172. The fixed box 50171 is fixed to the bottom center of the fixed plate 501. The fine-tuning screw 50172 is rotatably connected to the fixed box 50171 through a bearing. The axial direction of the fine-tuning screw 50172 is parallel to the length direction of the worktable 1. One end of the fine-tuning screw 50172 extends to the outside of the fixed box 50171 and is fixed with a fine-tuning knob 50174. A damping ring 50173 is provided between the fine-tuning screw 50172 and the fixed box 50171. The damping ring 50173 is used to provide rotational damping to prevent the fine-tuning screw from rotating on its own.

[0074] The fixed box 50171 has grooves 50176 on both sides. The bottom of the drive block 50175 extends downward through the fixed box 50171 and is fixedly connected to the movable seat 5018. The two sides of the movable seat 5018 are slidably connected to the grooves 50176 and the sliding grooves of the reinforcing rib 5021, respectively, so that the movable seat 5018 can move smoothly along the length of the worktable. The reinforcing rib 5021 not only provides guidance for the movable seat 5018, but also enhances the overall rigidity of the fixed plate 501.

[0075] A welding torch 5020 is mounted on the movable base 5018. Specifically, welding torch holders 5019 are symmetrically fixed on both sides of the movable base 5018. The welding torch 5020 is set in one of the welding torch holders 5019. The handle of the welding torch 5020 is clamped in the welding torch holder 5019. By adjusting the clamping position of the welding torch 5020 handle in the welding torch holder 5019, the radial distance between the welding nozzle of the welding torch 5020 and the surface of the pipe is adjusted. The welding torch holder 5019 is provided with locking screws for fixing the position of the welding torch.

[0076] The specific steps for using this device are as follows:

[0077] 1. Equipment preparation: According to the diameter of the pipe to be welded, select a support frame 306 of the corresponding length and install it on the connecting seat 305 of the fixed half ring 302. At the same time, select an auxiliary support frame 8 of the corresponding length and insert it into the fixed connecting seat 7 so that the upper surface height of the auxiliary support frame 8 is consistent with the upper surface height of the support frame 306.

[0078] 2. Place the pipe: Open the rotating half-rings 303 of the two clamping mechanisms 3, place the first section of pipe on the support frame 306 of the left clamping mechanism 3, and simultaneously place it on the auxiliary support frame 8 to keep the pipe horizontal; then close the rotating half-rings 303 and lock it through the locking structure 304; rotate the first adjusting handwheel 309 to make the adjusting screw 307 drive the pressure plate 308 to move downward, pressing the top of the pipe to complete the fixing of the first section of pipe; similarly, fix the second section of pipe in the right clamping mechanism 3.

[0079] 3. Pipe connection: Rotate the two second adjustment handwheels 402 respectively, and drive the two clamping mechanisms 3 to move towards each other along the T-shaped slide rail 2 through the adjustment device 4, so that the end faces of the two pipe sections are close to each other to the set gap. The movement distance can be precisely controlled by the scale lines and pointers on the side of the worktable 1.

[0080] 4. Install the welding carriage: Insert the first guide rail connecting wheel 5016 of the welding carriage 5 into the arc-shaped track 3010 of the clamping mechanism 3 on one side, and then compress the sliding connecting seat 509 to move the second guide rail connecting wheel 5010 toward the first guide rail connecting wheel 5016. After aligning with the arc-shaped track 3010 of the clamping mechanism 3 on the other side, release it. Under the action of the spring 5015, the second guide rail connecting wheel 5010 automatically inserts into the right track. Lock the sliding connecting seat 509 in place by the T-shaped fixing piece 5024. At this time, the first gear 508 and the second gear 5012 mesh with the arc-shaped racks 3011 on the left and right sides, respectively.

[0081] 5. Welding torch alignment: Rotate the fine-tuning knob 50174, which drives the moving seat 5018 to move axially along the pipe via the fine-tuning screw 50172, so that the welding nozzle of the welding torch 5020 is aligned with the joint of the two pipes. Adjust the clamping position of the welding torch 5020 in the welding torch holder 5019 to maintain a suitable welding distance between the welding nozzle and the pipe surface.

[0082] 6. Welding: Start the drive motor 503, and the power is transmitted to the first drive shaft 506 and the second drive shaft 507 respectively through the dual-shaft output reducer 502, which drives the first gear 508 and the second gear 5012 to rotate synchronously. Since the first gear 508 and the second gear 5012 mesh with the arc-shaped racks 3011 on the left and right sides respectively, when the gears rotate, they drive the entire welding carriage 5 to move in a circle along the circular track. The welding torch 5020 follows the welding carriage 5 to circle the pipe once, completing the ring welding.

[0083] 6. Disassembly: After welding is completed, loosen the T-shaped fastener 5024, compress the sliding connecting seat 509, remove the welding carriage 5 from the arc track, loosen the locking structure 304 on the two clamping mechanisms 3, open the rotating half ring 303, and take out the welded pipe.

[0084] The power engineering pipeline installation and welding equipment provided in this embodiment adopts an openable clamping mechanism design, which eliminates the need to insert the welding ring from the end of the pipeline, making it particularly suitable for pipelines that have already been laid or fixed at both ends. The welding trolley moves along a circular track between two clamping mechanisms, keeping the pipeline stationary and avoiding the pipeline offset problem in rotary welding methods. The bidirectional floating connecting wheel structure makes the installation of the welding trolley convenient. The three-point centering clamping structure ensures the coaxiality of the pipeline and the ring. The independent axial adjustment device enables precise docking of the pipeline end face.

[0085] 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 welding equipment for power engineering pipeline installation, comprising a workbench (1), characterized in that, Also includes: Two clamping mechanisms (3) are arranged opposite to each other. Each clamping mechanism (3) includes a fixed base (301). The fixed base (301) is slidably connected to the top of the worktable (1) and can move along the length of the worktable (1). Each clamping mechanism (3) further includes a fixed half-ring (302) and a rotating half-ring (303) that can be opened and combined to form a circular structure. Both the fixed half-ring (302) and the rotating half-ring (303) are provided with an arc track (3010) on one side. After the rotating half-ring (303) and the fixed half-ring (302) are closed, the two arc tracks (3010) are spliced ​​together to form a complete circular track. The welding carriage (5) is arranged between the two clamping mechanisms (3) and rolls in cooperation with the arc track (3010). The welding carriage (5) moves in a circular motion around the circular track. The welding carriage (5) is equipped with a welding torch (5020) for performing circumferential welding on the pipe joint during the movement.

2. The power engineering pipeline installation and welding equipment according to claim 1, characterized in that: Both the fixed half-ring (302) and the rotating half-ring (303) are provided with an arc-shaped rack (3011) on one side. After the rotating half-ring (303) and the fixed half-ring (302) are closed, the two arc-shaped racks (3011) are spliced ​​together to form a complete ring rack. The welding trolley (5) is provided with a drive motor (503) and a gear set that meshes with the arc-shaped rack (3011). The drive motor (503) drives the gear set to rotate, thereby driving the welding trolley (5) to move along a circular track.

3. The power engineering pipeline installation and welding equipment according to claim 2, characterized in that: The gear set includes a first gear (508) and a second gear (5012), the first gear (508) meshing with an arc rack of a clamping mechanism (3), and the second gear (5012) meshing with an arc rack of another clamping mechanism (3).

4. The power engineering pipeline installation and welding equipment according to claim 1, characterized in that: The welding trolley (5) is equipped with a guide rail connecting wheel assembly, which includes multiple rollers that roll against the outer surface, inner surface and end face of the arc-shaped track to limit the axial movement of the welding trolley (5).

5. The power engineering pipeline installation and welding equipment according to claim 1, characterized in that: The inner wall of the fixed semi-ring (302) is provided with at least two support frames (306) for supporting the pipe from below; the rotating semi-ring (303) is provided with an adjustable clamping member for clamping the fixed pipe from above.

6. The power engineering pipeline installation and welding equipment according to claim 1, characterized in that: Each of the clamping mechanisms (3) is provided with a locking structure (304) for locking and fixing the closed fixed half ring (302) and the rotating half ring (303).

7. The power engineering pipeline installation and welding equipment according to claim 6, characterized in that: The locking structure (304) includes a first fixed seat (3041) and a second fixed seat (3042) respectively located at the free ends of the fixed half ring (302) and the rotating half ring (303), and a cam (3047) rotatably mounted on the first fixed seat (3041). The first fixed seat (3041) is provided with a limit hole (30412) at its top. The second fixed seat (3042) is provided with a pressure plate (3049) and a limit block (30411) that can move up and down at its top. When the cam (3047) presses down on the pressure plate (3049), the limit block (30411) is inserted into the limit hole (30412) of the first fixed seat (3041) to achieve locking.

8. The power engineering pipeline installation and welding equipment according to claim 6, characterized in that: The welding carriage (5) is provided with a sliding connecting seat (509), and the second gear (5012) is mounted on the sliding connecting seat (509) through a rotating shaft (5011); the sliding connecting seat (509) can slide relative to the welding carriage (5) and is provided with a spring (5015) to keep the second gear (5012) in mesh with the corresponding arc-shaped rack (3011).

9. The power engineering pipeline installation and welding equipment according to claim 1, characterized in that: The welding trolley (5) is equipped with a fine-tuning mechanism (5017) for adjusting the movement of the welding torch (5020) along the pipeline axis.

10. The power engineering pipeline installation and welding equipment according to claim 1, characterized in that: The workbench (1) is provided with an auxiliary support frame (8) for supporting the pipe and keeping the pipe horizontal.

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