A device for welding and aligning the ends of a petrochemical pipeline

Abstract

The utility model discloses a kind of petrochemical pipeline welding butt joint leveling devices, specifically relate to pipeline welding technical field, including mounting plate, positioning assembly is provided on the mounting plate, the positioning assembly includes the mounting seat of being arranged in mounting plate one side, the bottom of the mounting seat is provided with connecting frame, the bottom end of the connecting frame is rotatably connected with two hinged plates. The utility model is driven gear and tooth plate meshing transmission by servo motor, realize the accurate adjustment of pipeline butt joint angle, cooperate with the symmetrical clamping plate structure of hydraulic rod drive, can be stabilized clamped and attitude calibration to pipeline, ensure that the center line of two sections of pipeline, end surface parallelism and welding gap uniformity all satisfy welding technical standard, effectively avoid the problems such as welding stress concentration, insufficient weld strength caused by interface deviation, reduce high pressure leakage, corrosion aggravation and other security risks from source, improve the overall quality and reliability of pipeline welding.

Description

Technical Field

[0001] This utility model relates to the field of pipeline welding technology, and more specifically, to a leveling device for welding joints of petrochemical pipelines. Background Technology

[0002] Petrochemical pipelines, serving as the "material transport arteries" of the petrochemical industry, are widely used in core scenarios such as oilfield exploration, refineries, chemical plants, long-distance oil and gas pipelines, and storage terminals. They primarily undertake the transportation of chemical raw materials such as crude oil, natural gas, refined oil, ethylene / propylene, and corrosive media such as acids and alkalis. Their welding quality directly affects the continuity of industrial production, the safety of energy transmission, and environmental protection. This is especially true for high-pressure long-distance pipelines and pipelines transporting corrosive media, which place extremely high demands on the coaxiality (centerline alignment accuracy), end face parallelism, and gap uniformity of welded joints. If the joint deviation exceeds the allowable range, it will lead to welding stress concentration, insufficient weld strength, and can easily cause high-pressure leaks, accelerated media corrosion, and other safety hazards. In severe cases, this can result in production stoppages, environmental pollution, or even safety accidents.

[0003] Currently, the leveling work before welding petrochemical pipelines still mainly relies on manual operation by welders. The pipeline position is adjusted by prying with crowbars and pushing with jacks. The leveling accuracy depends entirely on the operator's experience, making quantitative control impossible. This results in difficulties in meeting standards for coaxiality, end face parallelism, and gap uniformity, leading to poor welding quality stability. Petrochemical pipelines (especially high-pressure pipelines) can weigh several tons per section. During manual prying, the pipeline is subjected to uneven force, which can easily cause collisions and scratches at the pipe ends, directly damaging the anti-corrosion layer on the outer surface of the pipeline, destroying the pipeline's anti-corrosion barrier, shortening the pipeline's service life, and increasing subsequent maintenance costs. Manual operation is labor-intensive and inefficient. Furthermore, in complex operating scenarios such as high altitudes and outdoor areas, the safety of manual adjustments is difficult to guarantee, further restricting the overall progress and quality control of welding operations. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a petrochemical pipeline welding joint leveling device, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a petrochemical pipeline welding joint leveling device, including an installation plate, wherein a positioning component is provided on the installation plate; The positioning component includes a mounting base disposed on one side of the mounting plate, a connecting frame disposed at the bottom of the mounting base, two hinge plates rotatably connected to the bottom end of the connecting frame, and a clamping plate for positioning the pipe is respectively hinged to the bottom of each hinge plate. The clamping plate has connecting rods on both sides of its top, and the top of each connecting rod extends to the bottom of the connecting frame and is hinged to the connecting frame.

[0006] Optionally, in one possible implementation, a traction plate is rotatably connected to the top of the hinge plate, the traction plate is located at the bottom of the connecting frame, a hydraulic rod is provided on the top of the mounting base, the output end of the hydraulic rod extends to the traction plate, the traction plate is driven to move up and down via the hydraulic rod, and then the hinge plate is driven to pull the clamping plate to deflect and clamp and position the pipe. Optionally, in one possible implementation, a toothed plate is provided on one side of the mounting base, a lifting arc rod is bolted to the toothed plate, a gear is provided on the outer side of the toothed plate, the gear meshes with the toothed plate, a motor is provided on the side of the mounting base away from the lifting arc rod, the output end of the motor extends to the gear, a positioning groove is provided on one side of the clamping plate, the vertical cross-sectional shape of the positioning groove is set to arc, and the toothed plate is movably connected to the mounting base so that the gear meshes with the toothed plate and drives the toothed plate to rotate on the mounting base; The technical effects and advantages of this utility model are as follows: By using a servo motor to drive the gear and toothed plate to mesh and transmit power, the pipe joint angle can be precisely adjusted. Combined with the symmetrical clamping plate structure driven by the hydraulic rod, the pipe can be stably clamped and its posture calibrated. This ensures that the coaxiality of the center line of the two pipe sections, the parallelism of the end faces, and the uniformity of the welding gap all meet the welding technical standards. This effectively avoids problems such as welding stress concentration and insufficient weld strength caused by interface deviation, reducing safety hazards such as high pressure leakage and accelerated corrosion from the source, and improving the overall quality and reliability of pipe welding. The inner wall of the arc-shaped positioning groove of the clamping plate is fitted with a wear-resistant rubber pad, and the curvature of the positioning groove is adapted to the outer curvature of common petrochemical pipelines. During the clamping process, the elastic contact of the rubber pad enhances the stability of the pipeline fixation, while avoiding direct friction and collision between the metal clamping parts and the outer surface of the pipeline. This completely solves the problem of easy damage to the anti-corrosion layer during manual operation, ensuring the pipeline's anti-corrosion performance, extending the pipeline's service life, and reducing later maintenance costs. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0008] Figure 1 This is a front view of the overall structure of this utility model.

[0009] Figure 2 This is a side view of the overall structure of this utility model.

[0010] Figure 3 This is a schematic diagram of the mounting base, connecting frame, lifting arc rod, motor, gear and toothed plate of this utility model.

[0011] Figure 4 This is a schematic diagram of the mounting base, connecting frame, hinge plate, hydraulic rod, clamping plate, and connecting rod of this utility model.

[0012] Figure 5 This is an exploded view of the positioning component of this utility model.

[0013] The attached figures are labeled as follows: 1. Mounting plate; 2. Mounting base; 3. Connecting frame; 4. Hinge plate; 5. Clamping plate; 6. Connecting rod; 7. Traction plate; 8. Hydraulic rod; 9. Gear plate; 10. Lifting arc rod; 11. Gear; 12. Motor; 13. Positioning groove. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] This embodiment discloses a petrochemical pipeline welding joint leveling device, which aims to solve the technical problems of existing petrochemical pipeline welding joint leveling relying on welders' experience to pry the pipeline with crowbars and jacks, which has poor accuracy, low efficiency, and is prone to pipe end collision and damage to the anti-corrosion layer.

[0016] like Figure 1 and Figure 2 As shown, the petrochemical pipeline welding joint leveling device in this embodiment includes a mounting plate 1. The mounting plate 1 is made of Q235 steel plate, and its bottom can be fixed to the welding operation platform or mobile support by expansion bolts to ensure the overall stability of the device.

[0017] like Figure 4 and Figure 5 As shown, the positioning component includes a mounting base 2 welded and fixed to one side of the mounting plate 1. The mounting base 2 is a rectangular cast steel part with a connecting frame 3 integrally formed at its bottom.

[0018] The bottom of the connecting frame 3 is rotatably connected to two symmetrically arranged hinge plates 4 via a pin. The bottom of the two hinge plates 4 is respectively hinged to a clamping plate 5 for positioning the pipeline via a hinge shaft. The clamping plate 5 is an arc-shaped steel plate with an arc shape that matches the outer curvature of common petrochemical pipelines. A positioning groove 13 is provided on one side of the plate. The vertical cross-section of the positioning groove 13 is arc-shaped. A wear-resistant rubber pad is pasted on the inner wall of the groove. The surface of the rubber pad has an anti-slip texture, which can enhance the stability of the pipeline clamping and avoid damage to the anti-corrosion layer on the outer surface of the pipeline.

[0019] Connecting rods 6 are welded and fixed on both sides of the top of the clamping plate 5. The top of each connecting rod 6 extends to the bottom of the connecting frame 3 through a universal joint and is movably connected to the bottom hinge seat of the connecting frame 3 to realize adaptive angle adjustment when the clamping plate 5 deflects.

[0020] like Figure 4 As shown, the top of the hinge plate 4 is rotatably connected to the traction plate 7 via a pivot. The traction plate 7 is located directly below the connecting frame 3, and a hinge hole is provided at its center.

[0021] A hydraulic rod 8 is fixedly installed on the top of the mounting base 2 by bolts. The hydraulic rod 8 is a small bidirectional hydraulic rod. Its output end passes through the through hole of the mounting base 2 and is hinged to the hinge hole of the traction plate 7 through the pin. The hydraulic rod 8 drives the traction plate 7 to move up and down, which in turn drives the two hinge plates 4 to rotate synchronously around the pin at the bottom of the connecting frame 3, and finally pulls the clamping plate 5 to achieve the clamping or releasing action of the pipeline. Example

[0022] Based on Example 1, this example discloses a leveling device for welding joints in petrochemical pipelines, such as... Figure 3 As shown, a toothed plate 9 is movably connected to one side of the mounting base 2 via a sliding groove. The toothed plate 9 is an arc-shaped toothed rack. A lifting arc rod 10 is detachably installed on the toothed plate 9 via fastening bolts. The lifting arc rod 10 is a semi-circular stainless steel rod, and its two ends are engaged with the connecting holes of the toothed plate 9. It can be used to assist in hoisting the pipeline or to finely adjust the lateral position of the pipeline.

[0023] Gear 11 meshes with the outer side of the toothed plate 9. The module of gear 11 matches that of toothed plate 9 to ensure smooth transmission. A motor 12 is fixedly installed on the side of the mounting base 2 away from the lifting arc rod 10 by a motor bracket. The motor 12 is a servo motor. The output end of motor 12 extends to the central shaft of gear 11 through a coupling. Motor 12 drives gear 11 to rotate, thereby driving toothed plate 9 to rotate in the slide groove of mounting base 2, so as to achieve precise adjustment of pipe alignment angle.

[0024] The specific working principle is as follows: First, the mounting plate 1 is fixed to the preset position of the welding operation platform with expansion bolts to ensure that the device is level and stable. Then, the two petrochemical pipes to be welded are hoisted to the positioning groove 13 of the clamping plate 5 respectively, so that the pipe ends of the two pipes are initially aligned, and a welding gap of 3-5mm is reserved between the pipe ends.

[0025] Activate hydraulic rod 8, controlling its output end to extend downwards, pushing traction plate 7 to move downwards synchronously. Since both ends of traction plate 7 are rotatably connected to the tops of the two hinge plates 4, the downward movement of traction plate 7 causes the two hinge plates 4 to deflect inwards around the pin at the bottom of connecting frame 3. Simultaneously, the connecting rods 6 on both sides of the top of clamping plate 5 adaptively adjust their angles according to the deflection of hinge plates 4, ultimately driving the positioning grooves 13 of the two clamping plates 5 to clamp inwards until the rubber pads on the inner walls of the positioning grooves 13 are tightly fitted to the outer surface of the pipe, completing the initial clamping and fixing of the two pipe sections. During this process, because the positioning grooves 13 have an arc-shaped structure and the rubber pads are elastic, they can adapt to pipes of different outer diameters while avoiding damage to the pipe's anti-corrosion layer.

[0026] If the centerlines of the two pipe sections are not aligned, the gear 11 is rotated by the forward or reverse rotation of the motor 12. The gear 11 meshes with the toothed plate 9, causing the toothed plate 9 to rotate slowly within the groove of the mounting base 2. Since the lifting arc rod 10 is fixedly connected to the toothed plate 9 and is in contact with the outer surface of the pipe, the rotation of the toothed plate 9 will cause the pipe to deflect slightly through the lifting arc rod 10 until the centerlines of the two pipe sections are completely aligned. The precision control of the servo motor 12 is far superior to that of manual operation.

[0027] If the end faces of the two pipe sections are not parallel or the gap is uneven, the clamping force and angle of the clamping plate 5 can be adjusted by finely adjusting the extension and retraction of the hydraulic rod 8, and in conjunction with the rotation adjustment of the toothed plate 9, the end faces of the two pipe sections can be kept parallel and the gap between the pipe openings can be evenly distributed. The entire adjustment process can be confirmed by visual observation or with the assistance of a laser rangefinder.

[0028] Once the coaxiality, end face parallelism, and gap of the pipe joint meet the welding requirements, turn off the power source of motor 12 and hydraulic rod 8, keep the clamping plate 5 in a clamped state, and the pipe welding operation can be carried out. After the welding is completed, control the output end of hydraulic rod 8 to retract upward, pull the traction plate 7 to move upward, drive the two hinge plates 4 to deflect outward, the clamping plate 5 releases the pipe, and then lift the welded pipe away to complete one welding joint leveling operation.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A petrochemical pipeline welding joint leveling device, comprising a mounting plate (1), characterized in that: The mounting plate (1) is provided with a positioning component; The positioning component includes a mounting base (2) disposed on one side of the mounting plate (1), a connecting frame (3) is provided at the bottom of the mounting base (2), and two hinge plates (4) are rotatably connected to the bottom end of the connecting frame (3), and a clamping plate (5) for positioning the pipe is respectively hinged to the bottom of each hinge plate (4). The clamping plate (5) has connecting rods (6) on both sides of its top, and the top of each connecting rod (6) extends to the bottom of the connecting frame (3) and is hinged to the connecting frame (3).

2. The petrochemical pipeline welding joint leveling device according to claim 1, characterized in that: The top of the hinge plate (4) is rotatably connected to a traction plate (7), which is located at the bottom of the connecting frame (3).

3. The petrochemical pipeline welding joint leveling device according to claim 2, characterized in that: The top of the mounting base (2) is provided with a hydraulic rod (8), the output end of which extends to the traction plate (7). The traction plate (7) is driven to move up and down by the hydraulic rod (8), and then the hinge plate (4) is driven to pull the clamping plate (5) to deflect and clamp the pipe.

4. The petrochemical pipeline welding joint leveling device according to claim 1, characterized in that: A toothed plate (9) is provided on one side of the mounting base (2), and a lifting arc rod (10) is installed on the toothed plate (9) by bolts.

5. The petrochemical pipeline welding joint leveling device according to claim 4, characterized in that: A gear (11) is provided on the outer side of the toothed plate (9), and the gear (11) meshes with the toothed plate (9).

6. The petrochemical pipeline welding joint leveling device according to claim 5, characterized in that: A motor (12) is provided on the side of the mounting base (2) away from the lifting arc rod (10), and the output end of the motor (12) extends to the gear (11).

7. The petrochemical pipeline welding joint leveling device according to claim 1, characterized in that: The clamping plate (5) has a positioning groove (13) on one side, and the vertical cross-sectional shape of the positioning groove (13) is set to be arc-shaped.

8. A petrochemical pipeline welding joint leveling device according to claim 5, characterized in that: The toothed plate (9) is movably connected to the mounting base (2) so that the gear (11) meshes with the toothed plate (9) and drives the toothed plate (9) to rotate on the mounting base (2).

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