Automatic line marker

Abstract

The present application relates to the technical field of pipeline marking device, and specifically provides an automatic marking device, aiming at solving the technical problems of low precision, poor efficiency, high labor intensity and potential safety hazards of traditional manual marking. For this purpose, the automatic marking device comprises a mounting frame, a driving roller, a driving device, a clamping mechanism, a marking device and an axial limiting piece. The driving roller cooperates with the clamping mechanism to clamp the pipeline wall, so that the mounting frame is hung on the pipeline. The driving device drives the driving roller to rotate, so as to drive the mounting frame to move along the circumference of the pipeline. The marking device moves with the mounting frame to complete the circumferential marking. The axial limiting piece abuts against the end face of the pipeline to limit the marking position. Through the structural design of automatic clamping, hanging and circumferential driving marking, the automatic operation of pipeline circumferential marking can be realized, the marking precision and operation efficiency are effectively improved, the labor intensity of the operator is reduced, and the quality and progress requirements of modern pipeline construction are met.

Description

Technical Field

[0001] This invention relates to the field of pipe marking technology, and more specifically to automatic marking devices. Background Technology

[0002] In the weld inspection process of long-distance oil and gas pipelines, pipeline marking is a crucial step before track installation, and the quality of the marking directly affects the operational stability and inspection accuracy of subsequent testing equipment. Currently, pipeline marking is still generally completed manually with simple tools. With the continuous expansion of pipeline construction, the limitations of this traditional method are becoming increasingly apparent.

[0003] Specifically, the quality of manual marking is constrained by multiple factors, including the operator's skill level, fatigue level, and site environment. This can easily lead to problems such as marking trajectory deviation and uneven lines, resulting in uneven track installation gaps, track deviation, and adversely affecting construction efficiency. Furthermore, manual marking requires repeated measurements and markings, which is labor-intensive, time-consuming, and inefficient for large-diameter, long-distance pipeline construction. In addition, pipeline construction often takes place in open-air environments with complex working conditions. Frequent bending and climbing during manual marking not only results in high labor intensity and fatigue but also poses certain safety hazards. As pipeline construction continues to develop towards larger diameters, higher pressures, and longer distances, higher demands are placed on the accuracy and efficiency of beveling. Traditional manual marking methods are no longer sufficient to meet the quality and schedule requirements of modern pipeline construction, necessitating the replacement with automated marking equipment. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide an automatic marking device, which solves the technical problems of low accuracy, poor efficiency, high labor intensity and safety hazards of traditional manual marking.

[0005] At least one embodiment of the present invention provides an automatic marking device for marking lines on the outer peripheral wall of a pipe, comprising: Mounting bracket, wherein the mounting bracket is provided with a drive roller that abuts against the outer peripheral wall of the pipe; A driving device is mounted on the mounting frame and connected to the driving roller for driving the driving roller to rotate, thereby moving the mounting frame along the circumference of the pipe; A clamping mechanism is provided on the mounting frame. The clamping mechanism has a clamping wheel assembly, which can cooperate with the drive roller to clamp the pipe wall so that the mounting frame is hung on the pipe. A scribing tool is detachably mounted on one side of the mounting frame. The scribing tool can move circumferentially with the mounting frame and form circumferential scribing on the pipe wall. An axial limiting component is provided on the other side of the mounting bracket to abut against the end face of the pipe, thereby limiting the axial position of the mounting bracket and adjusting the distance between the scribing tool and the end face of the pipe.

[0006] According to one embodiment of this application, there are two drive rollers arranged at circumferential intervals along the pipe; there is one clamping wheel assembly located between the two drive rollers, and the two drive rollers and the clamping wheel assembly form a three-point clamping structure.

[0007] According to one embodiment of this application, a fixing plate is provided on one side of the bottom of the mounting frame, and a seat is detachably provided on the other side. The two ends of the axle of the drive roller are rotatably connected to the fixing plate and the seat, respectively. The clamping mechanism and the axial limiting member are both detachably provided on the seat.

[0008] According to one embodiment of this application, the clamping mechanism includes: A fixed seat is detachably mounted on the seat body, and the fixed seat has a radial groove extending radially along the pipe. The slide bar is slidably disposed within the radial slide groove; A clamping wheel bracket is disposed at one end of the slide rod near the pipe, and a clamping wheel assembly is disposed at the end of the clamping wheel bracket away from the slide rod. The clamping wheel bracket is arranged perpendicular to the slide rod and extends along the axial direction of the pipe. A quick clamp is mounted on the base. The movable end of the quick clamp is fixedly connected to the slide rod and is used to drive the slide rod to slide radially along the pipe so as to drive the clamping wheel assembly to move closer to or away from the drive roller through the clamping wheel bracket, thereby clamping and releasing the pipe wall.

[0009] According to one embodiment of this application, the slide bar has a protrusion extending axially along the pipe on the side away from the clamping wheel bracket, and the protrusion has a through hole extending radially along the pipe; the quick clamp includes: A lifting rod is arranged radially along the pipe and slidably passes through the through hole of the seat. The end of the lifting rod away from the pipe is provided with a lifting handle. The end of the lifting rod near the pipe is provided with a threaded section, and the threaded section is threadedly connected to an adjusting nut. An elastic element is sleeved on the lifting rod, with one end of the elastic element abutting against the adjusting nut and the other end abutting against the protrusion; The adjusting nut is used to adjust the compression of the elastic element, thereby adjusting the clamping force of the clamping wheel assembly on the pipe wall.

[0010] According to one embodiment of this application, the axial limiting member includes several adjusting pads and a support frame. The several adjusting pads are stacked on the base along the axial direction of the pipe. The support frame is detachably mounted on the adjusting pads. A limiting roller is rotatably mounted on one side of the support frame facing the pipe. The outer circumferential surface of the limiting roller is used to roll against the end face of the pipe. The adjusting pads are used to adjust the axial position of the support frame along the pipe, thereby adjusting the marking position of the marking device.

[0011] According to one embodiment provided in this application, the clamping wheel assembly includes: A connecting frame is hinged to the end of the clamping wheel bracket away from the slide bar; The wheel body has two wheels, which are arranged axially and rotatably mounted on the connecting frame; The connecting frame is capable of swinging around the hinge axis along the axial direction of the pipe to adjust the contact angle between the two wheels and the outer peripheral wall of the pipe.

[0012] According to one embodiment of this application, the driving device includes a drive motor disposed on the mounting frame and a power supply component detachably disposed on the mounting frame. The drive motor is connected to the drive roller via a sprocket and chain, and the power supply component is electrically connected to the drive motor to supply power to the drive motor.

[0013] According to one embodiment of this application, the mounting bracket is further provided with a controller, which is electrically connected to both the scribing tool and the drive device.

[0014] According to one embodiment of this application, the mounting bracket is further provided with a handle.

[0015] The automatic marking device provided in this invention, compared with existing technologies, can automatically complete the circumferential marking of pipelines, eliminating the need for repeated manual measurement and marking with hand tools. This significantly reduces the labor intensity of operators and avoids dangerous working postures such as bending over or climbing. The mounting method, in which the drive rollers and clamping wheel sets work together to hold the device, ensures stable attachment to the pipeline, preventing deviation during circumferential movement. The marking trajectory is uniform and flat, effectively improving marking accuracy and providing a reliable benchmark for subsequent track installation. The positioning method, where the axial limiting component abuts against the pipeline end face, precisely controls the distance between the marking position and the end face, ensuring consistency in the marking position. The overall equipment has a high degree of automation, and the marking speed is uniform and controllable. It is particularly suitable for construction scenarios involving large-diameter, long-distance pipelines, significantly improving work efficiency and meeting the higher requirements for quality and schedule in modern pipeline construction. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the automatic line marking device in an embodiment of the present invention; Figure 2 This is a front view of the automatic line marking device in an embodiment of the present invention; Figure 3 This is a schematic diagram of the mounting bracket and driving device in an embodiment of the present invention; Figure 4 This is a schematic diagram showing the positional relationship between the drive roller of the mounting frame and the pipe in an embodiment of the present invention; Figure 5 This is a schematic diagram of the clamping mechanism and clamping wheel assembly in an embodiment of the present invention.

[0018] In the diagram: 100, Pipe; 1, Mounting bracket; 101, Handle; 2, Drive roller; 3, Drive unit; 31, Power supply assembly; 4, Clamping mechanism; 41, Clamping wheel assembly; 411, Wheel body; 412, Connecting frame; 42, Fixed seat; 420, Radial groove; 43, Slide rod; 431, Protrusion; 44, Clamping wheel bracket; 45, Quick clamp; 451, Lifting rod; 452, Lifting handle; 453, Adjusting nut; 454, Elastic element; 5, Marking device; 6, Axial limiting element; 61, Adjusting pad; 62, Support frame; 63, Limiting roller; 7, Fixed plate; 8, Seat body. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0021] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0023] To make the drawings concise and easy to understand, some drawings only show one of the components with the same structure or function, or only one of them is marked. In this article, "one" not only means "only one", but can also mean "more than one", and "several" includes "two" and "more than two".

[0024] Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. The embodiments of this application are described in detail below with reference to the accompanying drawings.

[0025] like Figures 1-5As shown, an automatic marking device according to an embodiment of the present invention is used to mark lines on the outer peripheral wall of a pipe 100. It includes a mounting frame 1, which is a plate structure with several mounting positions. Specifically, the bottom of the mounting frame 1 has two spaced-apart drive rollers 2. The drive rollers 2 are polyurethane rollers with wide surfaces to ensure sufficient contact with the pipe wall. The outer peripheral surface of the drive rollers 2 abuts against the outer peripheral wall of the pipe 100. A drive device 3 is fixedly mounted on the mounting frame 1 and forms a transmission connection with the drive rollers 2 for outputting power. The mounting frame 1 also has a clamping mechanism 4, which has a clamping wheel assembly 41. The clamping wheel assembly 41 and the drive rollers 2 are located on different sides of the pipe wall of the pipe 100, and their cooperation clamps the pipe wall of the pipe 100 in the middle, thereby allowing the entire mounting frame 1 to be mounted on the pipe 100. A scribing device 5 is detachably mounted on one side of the mounting bracket 1. The scribing device 5 is a laser scribing device 5, with its working end facing the outer circumferential wall of the pipe 100. It can move along the circumference of the pipe 100 with the mounting bracket 1 and leave scribing marks on the pipe wall. An axial limiting member 6 is provided on the other side of the mounting bracket 1. The axial limiting member 6 can abut against the end face of the pipe 100, thereby limiting the position of the mounting bracket 1 in the axial direction of the pipe 100 and indirectly adjusting the distance between the scribing device 5 and the end face of the pipe 100.

[0026] In the above scheme, during use, the mounting frame 1 is first placed near the marking position on the pipe 100, with the drive roller 2 abutting against the outer circumferential wall of the pipe 100. Then, the clamping mechanism 4 is operated to move the clamping wheel assembly 41 toward the pipe wall of the pipe 100, clamping the pipe wall together with the drive roller 2. The entire automatic marking device is then stably mounted on the pipe 100. The position of the axial limiting member 6 is adjusted so that it abuts against the end face of the pipe 100, thereby determining the accurate axial position of the mounting frame 1 and ensuring that the marking position maintains a preset distance from the end face of the pipe 100. The drive device 3 is started, driving the drive roller 2 to rotate. The drive roller 2, relying on the friction between itself and the outer circumferential wall of the pipe 100, drives the entire mounting frame 1 to move circumferentially around the pipe 100. During the circumferential movement of the mounting frame 1, the marking device 5 moves synchronously, and its working end continuously marks a circumferential line on the outer circumferential wall of the pipe 100. Once the mounting bracket 1 has circled the pipe 100 once, the circumferential marking work can be completed.

[0027] This automatic marking machine can automatically complete the circumferential marking of pipeline 100, eliminating the need for manual hand-held tools for repeated measurement and marking, significantly reducing the labor intensity of operators and avoiding dangerous working postures such as bending over and climbing. The mounting method of the drive roller 2 and clamping wheel group 41 allows the equipment to be stably attached to the pipeline 100, preventing deviation during circumferential movement, and ensuring a uniform and flat marking trajectory, effectively improving marking accuracy and providing a reliable benchmark for subsequent track installation. The positioning method of the axial limiting component 6 abutting against the end face of the pipeline 100 can accurately control the distance between the marking position and the end face, ensuring the consistency of the marking position. The overall equipment has a high degree of automation, and the marking speed is uniform and controllable. It is especially suitable for the construction of large-diameter, long-distance pipelines 100, significantly improving work efficiency and meeting the higher requirements for quality and schedule in modern pipeline 100 construction.

[0028] Furthermore, in the automatic marking device, two drive rollers 2 are provided, arranged at a certain distance along the circumferential direction of the pipe 100, both rotatably mounted on the mounting frame 1 and abutting against the outer circumferential wall of the pipe 100. A clamping wheel assembly 41 is provided, positioned at the midpoint between the two drive rollers 2 in the circumferential direction. The two drive rollers 2 and the clamping wheel assembly 41 act on the pipe wall of the pipe 100 from different directions, forming a three-point clamping structure that holds the pipe wall of the pipe 100 in the middle. In the above scheme, during installation, two drive rollers 2 are sequentially abutted against the outer circumferential wall of the pipe 100, with the two drive rollers 2 spaced apart circumferentially to form two support contact points. Then, the clamping mechanism 4 is operated, causing the clamping wheel assembly 41 to move from the other side of the pipe 100 toward the pipe wall until the clamping wheel assembly 41 presses against the outer circumferential wall of the pipe 100, at which point the clamping wheel assembly 41 forms a third contact point. The two contact points of the drive rollers 2 and the contact point of the clamping wheel assembly 41 are triangularly distributed around the pipe 100, jointly clamping the pipe wall. During equipment operation, the two drive rollers 2 are simultaneously driven to rotate by the drive device 3, jointly providing the driving force for circumferential movement, while the clamping wheel assembly 41 presses accordingly, maintaining a stable three-point clamping state. During the circumferential movement around the pipe 100, the three contact points always remain in contact with the pipe wall, allowing the mounting frame 1 to move smoothly.

[0029] The three-point clamping structure, consisting of two drive rollers 2 and a clamping wheel set 41, makes the automatic marking device more stable and reliable on the pipe 100. The three contact points form a stable force triangle in the circumferential direction, effectively preventing the mounting frame 1 from swaying, tilting, or wobble during circumferential movement. The two drive rollers 2 provide driving force simultaneously, increasing the driving contact area, improving frictional driving force, reducing the possibility of slippage, and making circumferential movement smoother. The three-point clamping layout can also adapt to pipe diameter changes within a certain range, has a good tolerance for pipe 100 roundness errors, and ensures that the equipment always runs in close contact with the pipe wall during the marking process, thereby ensuring the roundness of the marking trajectory and the quality of the lines.

[0030] Furthermore, a fixing plate 7 is fixedly installed on one side of the bottom of the mounting frame 1, and a seat 8 is detachably installed on the other side. The two ends of the axle of the drive roller 2 are rotatably connected to the fixing plate 7 and the seat 8, respectively, allowing the drive roller 2 to rotate freely around its own axis. The clamping mechanism 4 is detachably installed on the seat 8, and the axial limiting member 6 is also detachably installed on the seat 8. The fixing plate 7 and the seat 8 are located on both sides of the drive roller 2, together forming the support frame at the bottom of the mounting frame 1.

[0031] In the above scheme, during assembly, first, one end of the axle of the drive roller 2 is inserted into the bearing hole of the fixing plate 7, and then the seat 8 is aligned with and fixed to the other end of the axle, so that the drive roller 2 is rotatably supported between the fixing plate 7 and the seat 8. Then, the clamping mechanism 4 is installed as a whole on the seat 8, and the axial limiting member 6 is installed in the corresponding position on the seat 8 to complete the assembly. When maintenance or replacement of parts is required, the seat 8 can be removed from the mounting bracket 1, and the clamping mechanism 4 and the axial limiting member 6 can be removed together, facilitating the inspection or replacement of components such as the drive roller 2 and the clamping mechanism 4. Both disassembly and installation are achieved through fasteners, making the operation simple and quick.

[0032] The structure employing a fixed plate 7 and a base 8 to support both ends of the drive roller 2 ensures a more stable installation, smoother rotation, and more balanced force distribution. The clamping mechanism 4 and axial limiting component 6 are both detachably mounted on the base 8, modularizing the functional components for easier production assembly and subsequent maintenance. The overall detachable design of the base 8 allows the bottom assembly to be disassembled and reassembled as an independent module. When it is necessary to replace the clamping mechanism 4 or axial limiting component 6 with different specifications to accommodate pipes 100 of different diameters, only the corresponding base 8 assembly needs to be replaced, eliminating the need to disassemble the entire mounting frame 1. This improves the equipment's versatility and ease of maintenance, while also reducing production and maintenance costs.

[0033] Furthermore, the clamping mechanism 4 mainly consists of a fixed base 42, a slide rod 43, a clamping wheel bracket 44, and a quick clamp 45. The fixed base 42 is detachably mounted on the base 8, and a radial groove 420 extending radially along the pipe 100 is provided on the fixed base 42. The slide rod 43 is slidably disposed within the radial groove 420, and can slide back and forth along the radial direction of the pipe 100. A clamping wheel bracket 44 is provided at one end of the slide rod 43 near the pipe 100. The clamping wheel bracket 44 is arranged perpendicular to the slide rod 43 and extends along the axial direction of the pipe 100. A clamping wheel assembly 41 is disposed at the end of the clamping wheel bracket 44 away from the slide rod 43. The quick clamp 45 is mounted on the base 8, and the movable end of the quick clamp 45 is fixedly connected to the slide rod 43 for driving the slide rod 43 to slide radially.

[0034] In the above scheme, when it is necessary to clamp the pipe 100, the quick clamp 45 is operated so that its movable end moves toward the pipe 100. The movable end drives the slide rod 43 to slide along the radial groove 420 on the fixed seat 42 toward the inside of the pipe 100. The slide rod 43 then pushes the clamping wheel bracket 44 to move toward the pipe 100. The clamping wheel bracket 44 drives the clamping wheel assembly 41 to approach the outer peripheral wall of the pipe 100 until the clamping wheel assembly 41 presses against the pipe wall, cooperating with the drive roller 2 to clamp the pipe 100. When it is necessary to release the pipe 100, the quick clamp 45 is operated in the opposite direction so that the movable end moves away from the pipe 100. The slide rod 43 then slides outward along the radial groove 420. The clamping wheel bracket 44 drives the clamping wheel assembly 41 away from the pipe wall, releasing the clamp on the pipe 100. The entire clamping and releasing action is completed with one-button operation of the quick clamp 45, which is quick and convenient.

[0035] The guide structure, employing a sliding rod 43 and a radial groove 420, ensures that the movement trajectory of the clamping wheel assembly 41 strictly follows the radial direction of the pipe 100, guaranteeing accurate clamping force direction and more stable and reliable clamping. The design of the clamping wheel bracket 44 extending axially along the pipe 100 increases the axial arrangement space of the clamping wheel assembly 41, allowing it to better conform to the pipe wall, increasing the contact area and improving clamping stability. The quick-release clamp 45 makes clamping and releasing operations extremely convenient; operators can complete the clamping action with a simple lever, without the need for additional tools, significantly shortening equipment installation and disassembly time, improving on-site work efficiency, and is particularly suitable for the needs of frequent site relocation operations in field construction environments.

[0036] Furthermore, the slide rod 43 has a protrusion 431 on the side away from the clamping wheel bracket 44. The protrusion 431 extends along the axial direction of the pipe 100, and a through hole extending radially along the pipe 100 is formed on the protrusion 431. The quick clamp 45 mainly consists of a lifting rod 451, an elastic element 454, and an adjusting nut 453. The lifting rod 451 is arranged radially along the pipe 100 and slides through the through hole of the protrusion 431. The end of the lifting rod 451 away from the pipe 100 has a lifting handle 452, and the end closer to the pipe 100 has a threaded section. The adjusting nut 453 is threaded onto the threaded section of the lifting rod 451. The elastic element 454 is sleeved on the lifting rod 451, with one end abutting against the adjusting nut 453 and the other end abutting against the protrusion 431. The adjusting nut 453 can be screwed in or out along the threaded section, thereby changing the degree of compression of the elastic element 454.

[0037] In the above scheme, during clamping, the operator holds the lifting handle 452 and pulls it away from the pipe 100. The lifting rod 451 moves outward accordingly, and the adjusting nut 453 moves with the lifting rod 451, compressing the elastic element 454. After being compressed, the elastic element 454 generates an elastic restoring force, which is transmitted to the slide rod 43 through the protrusion 431, pushing the slide rod 43 to slide inward into the pipe 100, thereby causing the clamping wheel assembly 41 to press against the pipe wall of the pipe 100. When there is a deviation in the pipe diameter of the pipe 100 or the pipe wall surface is uneven, the elastic element 454 can adaptively compensate through its own elastic deformation, so that the clamping wheel assembly 41 always maintains a pressing state against the pipe wall. When the clamping force needs to be adjusted, rotate the adjusting nut 453 to move it along the threaded section of the lifting rod 451, change the initial compression of the elastic element 454, thereby adjusting the elastic force of the elastic element 454 acting on the slide rod 43, and finally changing the clamping force of the clamping wheel assembly 41 on the pipe wall.

[0038] The structure employing an elastic element 454 to provide clamping force allows the clamping wheel assembly 41 to have a certain elastic margin in clamping the pipe wall of the pipe 100. This adapts to minor deviations in the outer diameter of the pipe 100 and unevenness in the pipe wall surface, ensuring that the clamping wheel assembly 41 always maintains good contact with the pipe wall and avoiding jamming or loosening that may occur with rigid clamping. The clamping force can be easily adjusted by adjusting the compression of the elastic element 454 with the adjusting nut 453 to accommodate pipes 100 of different materials and diameters, thus broadening the equipment's applicability. The guide structure, where the lifting rod 451 engages with the through hole of the protrusion 431, is simple and reliable. The lifting handle 452 facilitates manual operation by the operator. The overall structure is compact and easy to adjust, effectively improving the equipment's ease of use and adaptability.

[0039] Furthermore, the axial limiting component 6 mainly consists of several adjusting pads 61 and a support frame 62. Several adjusting pads 61 are stacked on the base 8 along the axial direction of the pipe 100, and each adjusting pad 61 has a certain axial thickness. The support frame 62 is detachably mounted on the outermost adjusting pad 61, and a limiting roller 63 is rotatably mounted on the side of the support frame 62 facing the pipe 100. The outer circumferential surface of the limiting roller 63 can roll against the end face of the pipe 100. By increasing or decreasing the number of adjusting pads 61, the position of the support frame 62 in the axial direction of the pipe 100 can be adjusted, thereby indirectly adjusting the distance between the marking position of the marking device 5 and the end face of the pipe 100.

[0040] In the above scheme, during installation, according to the required distance between the marking position and the end face of the pipe 100, a corresponding number of adjusting pads 61 are stacked and installed on the base 8. Then, the support frame 62 is installed on the adjusting pads 61, so that the limiting roller 63 faces the end face of the pipe 100. When the automatic marking device is mounted on the pipe 100, the outer circumferential surface of the limiting roller 63 abuts against the end face of the pipe 100, thereby limiting the axial position of the entire mounting frame 1. When the equipment is running, the mounting frame 1 moves circumferentially along the pipe 100, and the limiting roller 63 rolls along the end face of the pipe 100, always maintaining contact with the end face to prevent the mounting frame 1 from shifting axially. When it is necessary to adjust the marking position, the number of adjusting pads 61 is increased or decreased, so that the support frame 62 moves axially a corresponding distance, and the marking device 5 moves together with the mounting frame 1, thereby changing the distance between the marking position and the end face.

[0041] The axial position is adjusted by stacking adjusting pads 61. This method is simple, intuitive, and easy to adjust reliably. Operators can precisely control the distance between the marking position and the end face of the pipe 100 simply by adding or removing pads, meeting the marking requirements for different bevel sizes. The design of the limiting roller 63 rolling against the end face of the pipe 100 transforms traditional sliding friction into rolling friction, significantly reducing frictional resistance during axial movement. This makes the circumferential movement of the mounting bracket 1 smoother and also reduces wear on the end face of the pipe 100. The detachable design of the support frame 62 allows for easy replacement of different specifications of the limiting roller 63 or support frame 62 according to different working conditions, further improving the equipment's versatility and maintenance convenience. The overall axial positioning structure has controllable precision, effectively ensuring the accuracy and consistency of the marking position.

[0042] Furthermore, the clamping wheel assembly 41 mainly consists of a connecting frame 412 and two wheels 411. The connecting frame 412 is hinged at the end of the clamping wheel bracket 44 away from the slide bar 43, and can swing around the hinge axis. The two wheels 411 are arranged side by side along the axial direction of the pipe 100 and are rotatably mounted on the connecting frame 412. The hinge axis is set in a direction perpendicular to the axial direction of the pipe 100, so that the connecting frame 412 can swing around the hinge axis along the axial direction of the pipe 100, thereby adjusting the contact angle between the two wheels 411 and the outer peripheral wall of the pipe 100.

[0043] In the above scheme, when the clamping wheel assembly 41 approaches and presses against the pipe wall 100, both wheels 411 simultaneously contact the outer circumferential wall of the pipe 100. Since the connecting frame 412 and the clamping wheel bracket 44 are hinged, the connecting frame 412 can automatically swing slightly around the hinge axis according to the actual curvature of the outer wall of the pipe 100, adaptively adjusting the posture of the two wheels 411 so that the outer circumferential surfaces of both wheels 411 maintain good contact with the outer circumferential wall of the pipe 100. During the movement of the automatic marking device along the circumference of the pipe 100, the two wheels 411 roll along the pipe wall together with the mounting frame 1. The connecting frame 412 always adaptively adjusts the swing angle according to the actual surface condition of the pipe wall, ensuring that the two wheels 411 are always in stable contact with the pipe wall.

[0044] The clamping wheel assembly 41, with its dual-wheel body 411 articulated, allows the clamping wheel assembly 41 to adapt to the curvature changes of the outer wall of the pipe 100 through the swinging of the connecting frame 412. Both wheels 411 contact the pipe wall simultaneously, increasing the clamping contact area and improving clamping stability and reliability. The articulated floating design effectively compensates for the effects of pipe 100 roundness errors and surface unevenness, avoiding line or point contact problems that may occur with single-wheel clamping, resulting in a more uniform clamping force distribution. The two wheels 411, arranged side-by-side along the axial direction, also form a certain support span in the axial direction, enhancing the constraint on the axial position of the mounting frame 1, reducing axial movement during equipment operation, and further improving marking accuracy and operational stability.

[0045] Furthermore, the drive unit 3 mainly includes a drive motor and a power supply assembly 31. The drive motor is fixedly mounted on the mounting bracket 1, and the power supply assembly 31 is detachably mounted on the mounting bracket 1. The output shaft of the drive motor is connected to the drive roller 2 via a sprocket and chain mechanism, transmitting the rotational power of the motor to the drive roller 2. The power supply assembly 31 is electrically connected to the drive motor, providing the electrical energy required for the drive motor to operate. The power supply assembly 31 is detachably mounted, facilitating removal for charging or replacement.

[0046] In the above scheme, before starting the equipment, the fully charged power supply component 31 is installed in the corresponding position of the mounting frame 1, and the circuit between it and the drive motor is connected. After starting the equipment, the power supply component 31 supplies power to the drive motor, and the drive motor starts to run. The output shaft drives the drive roller 2 to rotate through the sprocket and chain mechanism. After the drive roller 2 rotates, it drives the entire mounting frame 1 to move circumferentially along the pipe 100 by relying on the friction between the drive roller 2 and the outer peripheral wall of the pipe 100. When the power supply component 31 is depleted, it can be removed from the mounting frame 1 and replaced with a spare power supply component 31 or recharged. After replacement, the equipment can continue to work. The sprocket and chain transmission mechanism reduces and increases the torque of the high-speed rotation of the motor and transmits it to the drive roller 2, providing sufficient driving force for the equipment.

[0047] The drive system employs a motor coupled with sprocket and chain transmission, resulting in a compact structure and reliable transmission. It provides stable and continuous driving force, ensuring the marking device 5 moves at a uniform speed along the circumference of the pipe 100, producing smooth and even lines. The detachable power supply unit 31 eliminates the need for an external power cord, eliminating the need for on-site power line installation. This is particularly suitable for outdoor pipe 100 construction scenarios, offering greater flexibility and convenience. The detachable power supply unit 31 also facilitates rotation, charging, and maintenance. Multiple power supply units 31 can be equipped to achieve continuous operation for extended periods, effectively ensuring construction progress. The overall drive system boasts a high degree of automation and stable operation, significantly improving the efficiency and quality of marking operations.

[0048] Furthermore, a controller is also provided on the mounting frame 1, which is electrically connected to the scribing device 5 and the drive unit 3 respectively. The controller can receive operation commands and output control signals to control the start and stop of the drive unit 3, its speed, and the scribing action of the scribing device 5. The controller is integrated into the mounting frame 1 and moves with the mounting frame 1.

[0049] In the above scheme, during operation, the operator issues a start command through the controller. Upon receiving the command, the controller simultaneously outputs control signals to the drive unit 3 and the scribing device 5. The drive unit 3 starts and drives the mounting frame 1 to begin circumferential movement, while the scribing device 5 begins its scribing action. During operation, the controller can adjust the rotational speed of the drive unit 3 as needed, thereby adjusting the scribing speed. When encountering a special position requiring a pause or deceleration, the operator issues a corresponding command through the controller, which controls the drive unit 3 to decelerate or pause, while simultaneously controlling the scribing device 5 to pause its scribing action. After completing one scribing cycle, the controller controls the drive unit 3 to stop running, and the scribing device 5 simultaneously stops its scribing action. Throughout the entire process, the controller coordinates the synchronous actions of the drive and scribing to ensure scribing quality.

[0050] The controller enables synchronized control of the drive and marking processes, ensuring that the operation of the drive unit 3 is synchronized with the marking action of the marking device 5. This avoids problems such as ink breaks and uneven line thickness caused by asynchrony, effectively improving marking quality. The controller allows for flexible adjustment of the marking speed to adapt to different pipe diameters and marking requirements, enhancing the equipment's adaptability. Centralized control simplifies the operation process; operators can complete all operations through the controller, reducing operational difficulty and improving work efficiency. The integrated controller design on the mounting bracket 1 ensures good overall equipment integrity, eliminating the need for an additional control cabinet, facilitating portability and on-site deployment, and making it suitable for the mobile operation characteristics of pipeline construction.

[0051] Furthermore, the mounting frame 1 is also equipped with a handle 101, which is fixedly installed at the top of the mounting frame 1 for easy gripping by the operator. The handle 101 has an ergonomic grip shape and the surface can be provided with an anti-slip structure, making it convenient for the operator to carry and move the entire automatic marking machine.

[0052] In the above scheme, when the equipment needs to be moved or relocated, the operator holds the handle 101 to lift and transport the entire automatic marking device to the target pipeline 100. During installation, the operator can hold the handle 101 to adjust the installation angle and position of the equipment, facilitating the alignment of the drive roller 2 with the outer wall of the pipeline 100. After use, the equipment is also removed from the pipeline 100 and stored using the handle 101. The handle 101, as the gripping part of the equipment, serves as the stress point during equipment handling and installation.

[0053] The handle 101 provides a convenient grip for the automatic marking device, making the handling and installation of the equipment easier and less strenuous. Operators can use one or both hands to hold the handle 101 for equipment transfer and deployment, significantly improving the equipment's portability. At the Pipeline 100 construction site, the equipment needs to be frequently moved between different weld locations; the handle 101 makes these moves more efficient and faster, reducing handling time. The handle 101 can also serve as a leverage point during equipment installation and disassembly, facilitating operators to adjust the equipment's posture and position, thus improving installation efficiency. The overall structure is simple and practical, effectively improving the equipment's ergonomics and ease of use.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic scribe for scribing an outer peripheral wall of a pipe (100), characterized by, include: Mounting bracket (1), on which a drive roller (2) is provided to abut against the outer peripheral wall of the pipe (100). A driving device (3) is mounted on the mounting frame (1) and connected to the driving roller (2) for driving the driving roller (2) to rotate, thereby driving the mounting frame (1) to move circumferentially along the pipe (100); A clamping mechanism (4) is provided on the mounting frame (1). The clamping mechanism (4) has a clamping wheel assembly (41). The clamping wheel assembly (41) can cooperate with the drive roller (2) to clamp the pipe wall of the pipe (100) so that the mounting frame (1) is hung on the pipe (100). The scribing device (5) is detachably mounted on one side of the mounting frame (1). The scribing device (5) can move circumferentially with the mounting frame (1) and form circumferential scribing on the pipe wall. An axial limiting member (6) is provided on the other side of the mounting bracket (1) to abut against the end face of the pipe (100) to limit the axial position of the mounting bracket (1) and thereby adjust the distance between the scribing tool (5) and the end face of the pipe (100).

2. The automatic scribe according to claim 1, wherein The drive rollers (2) are provided in two and are arranged circumferentially along the pipe (100); the clamping wheel group (41) is provided and located in the middle of the two drive rollers (2), and the two drive rollers (2) and the clamping wheel group (41) form a three-point clamping structure.

3. The automatic scribe according to claim 1, wherein The mounting bracket (1) has a fixing plate (7) on one side of its bottom and a seat (8) on the other side. The two ends of the axle of the drive roller (2) are rotatably connected to the fixing plate (7) and the seat (8) respectively. The clamping mechanism (4) and the axial limiting member (6) are both detachably mounted on the seat (8).

4. The automatic marking device according to claim 3, characterized in that, The clamping mechanism (4) includes: A fixed seat (42) is detachably mounted on the seat body (8), and the fixed seat (42) has a radial groove (420) extending radially along the pipe (100). The slide bar (43) is slidably disposed within the radial groove (420); A clamping wheel bracket (44) is disposed at one end of the slide rod (43) near the pipe (100), and a clamping wheel assembly (41) is disposed at one end of the clamping wheel bracket (44) away from the slide rod (43). The clamping wheel bracket (44) is arranged perpendicular to the slide rod (43) and extends along the axial direction of the pipe (100). A quick clamp (45) is mounted on the base (8). The movable end of the quick clamp (45) is fixedly connected to the slide rod (43) and is used to drive the slide rod (43) to slide radially along the pipe (100) so that the clamping wheel bracket (44) can drive the clamping wheel group (41) to approach or move away from the drive roller (2), thereby clamping and releasing the pipe wall of the pipe (100).

5. The automatic scribe according to claim 4, wherein The slide bar (43) has a protrusion (431) extending axially along the pipe (100) on the side away from the clamping wheel bracket (44), and the protrusion (431) has a through hole extending radially along the pipe (100); the quick clamp (45) includes: A lifting rod (451) is arranged radially along the pipe (100) and slidably passes through the through hole of the seat (8). A lifting handle (452) is provided at the end of the lifting rod (451) away from the pipe (100). A threaded section is provided at the end of the lifting rod (451) near the pipe (100), and an adjusting nut (453) is threadedly connected to the threaded section. An elastic element (454) is sleeved on the lifting rod (451). One end of the elastic element (454) abuts against the adjusting nut (453), and the other end abuts against the protrusion (431). The adjusting nut (453) is used to adjust the compression of the elastic element (454) to adjust the clamping force of the clamping wheel assembly (41) on the pipe wall (100).

6. The automatic scribe of claim 3, wherein, The axial limiting component (6) includes several adjusting pads (61) and a support frame (62). The several adjusting pads (61) are stacked on the seat (8) along the axial direction of the pipe (100). The support frame (62) is detachably mounted on the adjusting pads (61). The support frame (62) is rotatably mounted with a limiting roller (63) on one side facing the pipe (100). The outer circumferential surface of the limiting roller (63) is used to roll against the end face of the pipe (100). The adjusting pads (61) are used to adjust the axial position of the support frame (62) along the pipe (100), thereby adjusting the marking position of the marking device (5).

7. The automatic scribe according to claim 4, wherein The clamping wheel assembly (41) includes: The connecting frame (412) is hinged to one end of the clamping wheel bracket (44) away from the slide bar (43); Two wheels (411) are arranged axially and rotatably mounted on the connecting frame (412); The connecting frame (412) is able to swing around the hinge axis along the axial direction of the pipe (100) to adjust the contact angle between the two wheels (411) and the outer peripheral wall of the pipe (100).

8. The automatic scribe of claim 1, wherein, The drive device (3) includes a drive motor mounted on the mounting frame (1) and a power supply assembly (31) detachably mounted on the mounting frame (1). The drive motor is connected to the drive roller (2) via a sprocket and chain. The power supply assembly (31) is electrically connected to the drive motor and is used to supply power to the drive motor.

9. The automatic scribe of claim 1, wherein, The mounting bracket (1) is also equipped with a controller, which is electrically connected to the scribing device (5) and the drive device (3).

10. The automatic scribe of claim 1, wherein, The mounting bracket (1) is also provided with a handle (101).

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