A pipeline external inspection and flaw detection device

Abstract

This application relates to the field of pipeline inspection technology, and particularly to a pipeline external inspection and flaw detection device, comprising: a first ring body; a second ring body, the second ring body being arranged at a distance from the first ring body; a rotating frame, disposed between the first and second ring bodies, the rotating frame having an inspection area for the pipeline to pass through, one end of the rotating frame being slidably connected to the first ring body, and the other end being slidably connected to the second ring body; and a first adjusting mechanism disposed on the rotating frame, the first adjusting mechanism including a telescopic device, the telescopic movable end of the telescopic device extending to the inner side of a first crossbeam, an X-ray emitter mounted on the telescopic movable end of the telescopic device, and an X-ray detector disposed on the rotating frame, the X-ray emitter and the X-ray detector being distributed at a distance from each other inside the rotating frame. This application achieves continuous full-circumference scanning inspection of pipelines, and can be precisely adjusted according to different pipe diameters, wall thicknesses, and inspection requirements, overcoming the limitations of traditional equipment.

Description

Technical Field

[0001] This application relates to the field of pipeline inspection technology, and in particular to a pipeline external inspection and flaw detection device. Background Technology

[0002] Pipelines, as vital transportation carriers in industrial production, are widely used in critical fields such as petrochemicals, nuclear power, and pressure vessels. During long-term use, pipelines are susceptible to defects such as cracks, corrosion thinning, and inclusions due to factors like media corrosion, stress fatigue, and temperature changes, seriously threatening production safety and equipment reliability. Therefore, regular non-destructive testing of pipelines is of great importance.

[0003] X-ray inspection technology, as an important non-destructive testing method, has advantages such as high detection accuracy, strong penetration ability, and the ability to directly display internal defects, and is widely used in the field of pipeline flaw detection. Traditional X-ray pipeline inspection methods mainly include two types: internal transmission and external transmission. The internal transmission method places the X-ray source inside the pipeline and the film on the outer wall of the pipeline for inspection; the external transmission method is the opposite, placing the X-ray source outside the pipeline and the detector inside the pipeline or on the opposite side.

[0004] However, traditional fixed X-ray inspection devices can only inspect localized areas of pipelines, failing to achieve full circumferential coverage. This necessitates multiple relocations of equipment or changes in pipeline position, resulting in low inspection efficiency. Furthermore, the distance between the X-ray generator and detector in existing devices is typically fixed and cannot be adjusted according to different pipe diameters, wall thicknesses, or inspection requirements, thus limiting inspection sensitivity and image quality. Utility Model Content

[0005] This application aims to at least partially address one of the aforementioned technical problems in the prior art. To this end, embodiments of this application provide a pipe external inspection and flaw detection device that enables continuous full-circumference scanning inspection of the pipe. The position of the X-ray emitter relative to the X-ray detector can be precisely adjusted according to different pipe diameters, wall thicknesses, and inspection requirements, overcoming the limitations of fixed detection distance in traditional equipment and significantly improving inspection adaptability and image quality.

[0006] An external pipeline inspection and flaw detection device includes an X-ray emitter and an X-ray detector, and further includes: First ring body; The second ring body is arranged at a distance from the first ring body, and the pipe to be tested is used to pass through the inside of the first ring body and the second ring body; A rotating frame is disposed between the first ring body and the second ring body. The rotating frame has a detection area inside for pipes to pass through. Along the axial direction of the first ring body, the detection area at least partially overlaps with the inner ring of the first ring body and the inner ring of the second ring body. One end of the rotating frame is slidably connected to the first ring body and the other end is slidably connected to the second ring body. The rotating frame is used to rotate circumferentially along the first ring body and the second ring body. A first adjustment mechanism is provided on the rotating frame. The first adjustment mechanism includes a telescopic device. The telescopic movable end of the telescopic device extends to the inside of the rotating frame. The X-ray emitter is installed on the telescopic movable end of the telescopic device. The X-ray detector is provided on the rotating frame. The X-ray emitter and the X-ray detector are distributed relatively at intervals inside the rotating frame. The area between the X-ray emitter and the X-ray detector is the detection area. The telescopic device can move the X-ray emitter closer to or further away from the X-ray detector.

[0007] In an optional or preferred embodiment, the rotating frame includes a first end plate, a second end plate, a first crossbeam, and a second crossbeam. The first end plate and the second end plate are distributed relatively at intervals along the axial direction of the first ring body. The first end plate is disposed close to the first ring body, and the second end plate is disposed close to the second ring body. A first slider is disposed on the first end plate, and a first annular slide rail is disposed around the first ring body. The first slider is slidably connected to the first annular slide rail. A second slider is disposed on the second end plate, and a second annular slide rail is disposed around the second ring body. The second slider is slidably connected to the second annular slide rail. The two ends of the first crossbeam are respectively connected to the first end plate and the second end plate, and the two ends of the second crossbeam are respectively connected to the first end plate and the second end plate. The first crossbeam and the second crossbeam are distributed relatively at intervals between the first end plate and the second end plate. The first adjusting mechanism is mounted on the first crossbeam.

[0008] In an optional or preferred embodiment, a power component is provided on the first end plate, a drive wheel is installed at the power output end of the power component, a first transmission wheel is fixed on the inner side of the first ring body, the first transmission wheel is concentrically arranged with the first ring body, a first through hole for pipe passage is provided in the middle of the first transmission wheel, and the drive wheel is connected to the first transmission wheel in a transmission connection.

[0009] In an optional or preferred embodiment, one end of the second crossbeam is provided with a first arm plate extending close to the first ring body, a first support wheel is rotatably mounted on the first arm plate, the first support wheel is connected to the first transmission wheel, and the first support wheel and the drive wheel are arranged opposite to each other on both sides of the first transmission wheel.

[0010] In an optional or preferred embodiment, a second transmission wheel is provided on the inner side of the second ring body. The second transmission wheel is concentrically arranged with the second ring body. A second through hole for pipe passage is provided in the middle of the second transmission wheel. A second arm plate extending to the second ring body is provided at the other end of the second crossbeam. A second support wheel is rotatably mounted on the second arm plate. The second support wheel is connected to the second transmission wheel. The rotation axis of the first support wheel and the rotation axis of the second support wheel are connected through a synchronous shaft.

[0011] In an optional or preferred embodiment, the first adjustment mechanism further includes a lateral movement device mounted on the first crossbeam, and the telescopic device mounted on the lateral movement movable end of the lateral movement device.

[0012] In an optional or preferred embodiment, the lateral movement device includes a guide shaft, a lateral movement sleeve, a lateral movement seat, a lateral movement drive component, a lateral movement transmission gear, and a lateral movement transmission rack. The guide shaft is horizontally disposed on the first crossbeam, and both ends of the guide shaft are fixed to the first crossbeam. The lateral movement sleeve is slidably mounted on the guide shaft. The lateral movement seat is fixed on the lateral movement sleeve. The lateral movement drive component is fixed on the lateral movement seat. The lateral movement transmission gear is mounted on the power output end of the lateral movement drive component. The lateral movement transmission rack is fixed on the first crossbeam and extends along the length direction of the first crossbeam. The lateral movement transmission rack is parallel to the guide shaft, and the lateral movement transmission gear meshes with the lateral movement transmission rack for transmission.

[0013] In an optional or preferred embodiment, the telescopic device includes a first support plate, a first sliding shaft, a first bushing, a first limiting plate, and a first telescopic drive device. The first support plate is mounted on the transverse support, which has at least two spaced-apart first holes. The first bushing is mounted on the first support plate, aligned with the first holes. The first sliding shaft passes through the first holes and the first bushing, with one end extending to the inner side of the first crossbeam and the other end extending to the outer side of the first crossbeam. The inner end of each first sliding shaft extending to the first crossbeam is fixedly connected to the X-ray emitter, and the outer end of each first sliding shaft extending to the first crossbeam is connected via the first limiting plate. The first telescopic drive device is mounted on the first support plate, and the power output shaft of the first telescopic drive device is connected to the X-ray emitter.

[0014] In an optional or preferred embodiment, the first adjustment mechanism further includes an angle adjustment device connected to the telescopic device, which is used to drive the telescopic device to deflect along the length direction of the first crossbeam.

[0015] In an optional or preferred embodiment, the transverse sliding seat is provided with a hinge seat, and the first support plate is provided with an ear plate. The ear plate is hinged to the hinge seat via a rotating shaft. The rotation axis of the rotating shaft is perpendicular to the axis of the guide shaft. The angle adjustment device includes a fixed plate, an angle adjustment motor, a first pulley, a second pulley, and a synchronous belt. The angle adjustment motor is fixed to the transverse sliding seat via the fixed plate. The first pulley is connected to the power output end of the angle adjustment motor. The second pulley is coaxially fixed to the rotating shaft. The second pulley and the first pulley are spaced apart along the length direction of the guide shaft. The synchronous belt connects the first pulley and the second pulley.

[0016] In an optional or preferred embodiment, a second adjustment mechanism is provided on the second crossbeam, and the X-ray detector is mounted on the second adjustment mechanism. The second adjustment mechanism is used to move the X-ray detector closer to or away from the X-ray emitter.

[0017] In an optional or preferred embodiment, the second adjustment mechanism includes a second support plate, a second sliding shaft, a second bushing, a second limiting plate, and a second telescopic drive device. The second support plate is disposed on the second crossbeam, and at least two spaced second holes are provided on the second support plate. The second bushing is aligned with the second holes and fixed on the second support plate. The second sliding shaft passes through the second holes and the second bushing, with one end extending to the inner side of the second crossbeam and the other end extending to the outer side of the second crossbeam. The end of each second sliding shaft extending to the inner side of the second crossbeam is connected to the X-ray detector, and the end of each second sliding shaft extending to the outer side of the second crossbeam is connected through the second limiting plate. The second telescopic drive device is mounted on the second support plate, and the power output shaft of the second telescopic drive device is connected to the X-ray detector.

[0018] In an optional or preferred embodiment, a guide post is provided on the second crossbeam, the guide post extends along the length of the second crossbeam, the two ends of the guide post are fixed to the second crossbeam, and the second support plate is slidably assembled on the guide post.

[0019] In an optional or preferred embodiment, roller assemblies are provided on both sides of the X-ray detector. The roller assembly includes two spaced rollers, the surface of which is higher than the detection surface of the X-ray detector, and the rolling direction of the rollers is the same as the circumferential direction of the pipe to be tested.

[0020] Based on the above technical solution, the embodiments of this application have at least the following beneficial effects: This application realizes continuous scanning detection of the entire circumference of the pipeline through the circumferential rotation of the rotating frame, which completely solves the problem that traditional fixed detection devices can only detect local areas, greatly improving detection efficiency and coverage. In addition, the first adjustment mechanism allows the position of the X-ray emitter relative to the X-ray detector to be precisely adjusted according to different pipe diameters, wall thicknesses and detection requirements, overcoming the limitation of fixed detection distance of traditional equipment, and significantly improving detection adaptability and image quality. Attached Figure Description

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the external pipeline inspection and flaw detection device according to an embodiment of this application; Figure 2 yes Figure 1 A structural schematic diagram from another perspective of the embodiment shown; Figure 3 yes Figure 1 A structural schematic diagram from a third-view perspective of the embodiment shown; Figure 4 yes Figure 1 A schematic diagram of the structure of the first adjusting mechanism in the embodiment shown; Figure 5 yes Figure 4 Another structural diagram from a different perspective; Figure 6 yes Figure 1 A magnified view of a section at point A in the middle; Figure 7 yes Figure 2 A magnified view of a section at point B.

[0022] Figure label: 100-X-ray emitter; 200-X-ray detector; 210-roller assembly; 300-first ring body; 310-first annular slide rail; 320-first drive wheel; 400-second ring body; 410-second annular slide rail; 420-second drive wheel; 500-rotating frame; 510-detection area; 520-first end plate; 521-first slider; 522-power component; 530-second end plate; 531-second slider; 540-first crossbeam; 540-battery compartment; 550-second crossbeam; 551-first arm plate; 551a-first support wheel; 552-second arm plate; 552a-second support wheel; 553-synchronous shaft; 554-guide column; 600-first adjustment mechanism; 610-telescopic device; 6 11-First support plate; 611a-Ear plate; 612-First sliding shaft; 613-First bushing; 614-First limiting plate; 615-First telescopic drive device; 620-Transverse movement device; 621-Guide shaft; 622-Transverse sliding sleeve; 623-Transverse seat; 623a-Hinge seat; 624-Transverse drive component; 625-Transverse transmission gear; 626-Transverse transmission rack; 630-Angle adjustment device; 631-Fixing plate; 632-Angle adjustment motor; 633-First pulley; 634-Second pulley; 635-Synchronous belt; 700-Second adjustment mechanism; 710-Second support plate; 720-Second sliding shaft; 730-Second bushing; 740-Second limiting plate; 750-Second telescopic drive device. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0024] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are 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, and therefore should not be construed as a limitation of this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] Pipelines, as vital transportation carriers in industrial production, are widely used in critical fields such as petrochemicals, nuclear power, and pressure vessels. During long-term use, pipelines are susceptible to defects such as cracks, corrosion thinning, and inclusions due to factors like media corrosion, stress fatigue, and temperature changes, seriously threatening production safety and equipment reliability. Therefore, regular non-destructive testing of pipelines is of great importance.

[0030] X-ray inspection technology, as an important non-destructive testing method, has advantages such as high detection accuracy, strong penetration ability, and the ability to directly display internal defects, and is widely used in the field of pipeline flaw detection. Traditional X-ray pipeline inspection methods mainly include two types: internal transmission and external transmission. The internal transmission method places the X-ray source inside the pipeline and the film on the outer wall of the pipeline for inspection; the external transmission method is the opposite, placing the X-ray source outside the pipeline and the detector inside the pipeline or on the opposite side.

[0031] However, traditional fixed X-ray inspection devices can only inspect localized areas of pipelines, failing to achieve full circumferential coverage. This necessitates multiple relocations of equipment or changes in pipeline position, resulting in low inspection efficiency. Furthermore, the distance between the X-ray generator and detector in existing devices is typically fixed and cannot be adjusted according to different pipe diameters, wall thicknesses, or inspection requirements, thus limiting inspection sensitivity and image quality.

[0032] The pipeline external inspection and flaw detection device provided by this invention enables efficient full-circumference inspection of pipelines, effectively solving the technical problems of low inspection efficiency and fixed inspection distance of traditional fixed X-ray inspection devices.

[0033] Reference Figures 1 to 7 This application provides a pipeline external inspection and flaw detection device, including an X-ray emitter 100, an X-ray detector 200, a first ring body 300, a second ring body 400, a rotating frame 500, and a first adjustment mechanism 600.

[0034] The first ring 300 and the second ring 400 are arranged at intervals relative to each other. The pipe to be inspected passes through the first ring 300 and the second ring 400. Specifically, the first ring 300 and the second ring 400 are arranged at intervals relative to each other and are kept coaxially aligned. The inner diameter of the first ring 300 and the second ring 400 is determined according to the maximum outer diameter of the pipe to be inspected, and is usually designed to be 1.2-1.5 times the maximum outer diameter of the pipe to ensure that the pipe can pass through smoothly.

[0035] A rotating frame 500 is disposed between the first ring body 300 and the second ring body 400. The rotating frame 500 has an internal detection area 510 for pipe passage. The first ring body 300, the second ring body 400, and the rotating frame 500 together form a pipe passage channel. Along the axial direction of the first ring body 300, the detection area 510 at least partially overlaps with the inner rings of the first ring body 300 and the second ring body 400, ensuring that the detection range covers the target area of ​​the pipe. Specifically, along the axial direction of the first ring body 300, the detection area 510 is completely located within the inner rings of the first ring body 300 and the second ring body 400. One end of the rotating frame 500 is slidably connected to the first ring body 300, and the other end is slidably connected to the second ring body 400. The rotating frame 500 can rotate circumferentially along the first ring body 300 and the second ring body 400.

[0036] A first adjustment mechanism 600 is mounted on a rotating frame 500. The first adjustment mechanism 600 includes a telescopic device 610, the telescopic movable end of which extends into the inner side of the rotating frame 500. An X-ray emitter 100 is mounted on the telescopic movable end of the telescopic device 610, and an X-ray detector 200 is disposed inside the rotating frame 500. The two are distributed relatively at intervals within the rotating frame 500. The area between the X-ray emitter 100 and the X-ray detector 200 is the detection area 510, through which the pipe passes. The first adjustment mechanism 600 uses the telescopic device 610 to move the X-ray emitter 100 closer to or further away from the X-ray detector 200, thereby adjusting the distance between them. When the pipe passes through the detection area 510, the X-rays emitted by the X-ray emitter 100 penetrate the pipe and are received by the X-ray detector 200, thus achieving non-destructive testing of the pipe.

[0037] This application achieves continuous full-circumference scanning and detection of pipelines through the circumferential rotation of the rotating frame 500, completely solving the problem that traditional fixed detection devices can only detect local areas, and greatly improving detection efficiency and coverage. In addition, the telescopic device 610 of the first adjustment mechanism 600 allows the position of the X-ray emitter 100 relative to the X-ray detector 200 to be precisely adjusted according to different pipe diameters, wall thicknesses and detection requirements, overcoming the limitation of fixed detection distance of traditional equipment, and significantly improving detection adaptability and image quality.

[0038] In some embodiments, the rotating frame 500 includes a first end plate 520, a second end plate 530, a first crossbeam 540, and a second crossbeam 550. The first end plate 520 and the second end plate 530 are distributed at relative intervals along the axial direction of the first ring body 300, wherein the first end plate 520 is disposed close to the first ring body 300, and the second end plate 530 is disposed close to the second ring body 400. A first slider 521 is disposed on the first end plate 520, and a first annular slide rail 310 is disposed around the first ring body 300, with the first slider 521 slidably connected to the first annular slide rail 310. Specifically, three first sliders 521 are disposed on the first end plate 520 at 120-degree intervals, and each first slider 521 is slidably connected to the first ring body 300. A second slider 531 is disposed on the second end plate 530, and a second annular slide rail 410 is disposed around the second ring body 400, with the second slider 531 slidably connected to the second annular slide rail 410. Specifically, three second sliders 531 are arranged at 120-degree intervals on the second end plate 530, and each second slider 531 is slidably connected to the second ring body 400. This sliding connection method ensures that the rotating frame 500 can rotate smoothly in the circumferential direction.

[0039] The first crossbeam 540 is connected to the first end plate 520 and the second end plate 530 at both ends, and the second crossbeam 550 is also connected to the first end plate 520 and the second end plate 530 at both ends. The first crossbeam 540 and the second crossbeam 550 are distributed at relative intervals between the first end plate 520 and the second end plate 530 to ensure the structural stability of the rotating frame 500. The first adjustment mechanism 600 is mounted on the first crossbeam 540 to provide support and adjustment functions for the X-ray emitter 100.

[0040] To better accommodate the circular cross-section of the pipe, both the first end plate 520 and the second end plate 530 are designed as semi-circular arc-shaped plates. This arc-shaped plate structure can better accommodate the pipe and facilitate rotation, providing a more stable support effect. In specific implementation, the first end plate 520 and the second end plate 530 are parallel and aligned to ensure the balance of the rotating frame 500 during rotation.

[0041] In some embodiments, battery compartments 540 are provided on the inner side of the first end plate 520 and the inner side of the second end plate 530, and the battery compartments 540 adopt a fan-shaped structure design. The fan-shaped battery compartments 540 make full use of the space of the arc-shaped end plates and can accommodate a sufficient number of lithium battery packs to provide a continuous and stable power supply for the entire detection device.

[0042] A power component 522 is mounted on the first end plate 520, serving as the rotational power source for the rotating frame 500. The power component 522 can be a motor, a reducer, or other drive device. A drive wheel is installed at the power output end of the power component 522, and a first transmission wheel 320 is fixed to the inner side of the first ring body 300. The first transmission wheel 320 is concentrically arranged with the first ring body 300 to ensure transmission accuracy. A first through hole for pipe passage is provided in the middle of the first transmission wheel 320, allowing the pipe to pass freely without being affected by the transmission system. The drive wheel is connected to the first transmission wheel 320 in a transmission connection. When the power component 522 operates, it drives the first transmission wheel 320 to rotate via the drive wheel, thereby causing the entire rotating frame 500 to rotate circumferentially.

[0043] To provide additional support and transmission stability, one end of the second crossbeam 550 is provided with a first arm plate 551 extending close to the first ring body 300. A first support wheel 551a is rotatably mounted on the first arm plate 551, and the first support wheel 551a establishes a transmission connection with the first transmission wheel 320. The first support wheel 551a not only provides a transmission function, but also can share the transmission load, improving the rotational stability of the rotating frame 500.

[0044] In the preferred arrangement, the first support wheel 551a and the drive wheel are arranged opposite each other on both sides of the first transmission wheel 320, forming a symmetrical transmission structure. This arrangement can evenly distribute the transmission force and reduce the eccentric load on the first transmission wheel 320.

[0045] To further improve the stability and synchronization of the transmission, a second transmission wheel 420 is fixed to the inner side of the second ring 400. The second transmission wheel 420 is concentrically arranged with the second ring 400, and a second through hole for pipe passage is provided in the middle of the second transmission wheel 420. The other end of the second crossbeam 550 is provided with a second arm plate 552 extending close to the second ring 400, and a second support wheel 552a is rotatably mounted on the second arm plate 552. The second support wheel 552a establishes a transmission connection with the second transmission wheel 420, and at the same time, the rotation axis of the first support wheel 551a and the rotation axis of the second support wheel 552a are connected through a synchronous shaft 553. This forms a complete synchronous transmission system, ensuring that the rotating frame 500 has stable transmission support at both ends.

[0046] In the specific arrangement, the second support wheel 552a and the second end plate 530 are arranged opposite each other on both sides of the second transmission wheel 420, corresponding to the arrangement of the first end, forming an overall symmetrical structure.

[0047] To achieve higher transmission accuracy and greater transmission torque, the driving wheel and the first transmission wheel 320 adopt a gear structure. Gear transmission has advantages such as accurate transmission ratio, high transmission efficiency, and smooth transmission. Simultaneously, the first support wheel 551a and the second support wheel 552a also adopt a gear structure, forming a gear transmission pair with the corresponding driven wheels.

[0048] In some embodiments, the first adjustment mechanism 600 includes a telescopic device 610 disposed on the first crossbeam 540. The telescopic movable end of the telescopic device 610 extends to the inner side of the first crossbeam 540, and the X-ray emitter 100 is mounted on the telescopic movable end of the telescopic device 610. The distance between the X-ray emitter 100 and the X-ray detector 200 can be adjusted by the telescopic movement of the telescopic device 610.

[0049] To provide a wider adjustment range and higher adjustment accuracy, the first adjustment mechanism 600 may also include a lateral movement device 620. The lateral movement device 620 is mounted on the first crossbeam 540, and the telescopic device 610 is mounted on the lateral movement movable end of the lateral movement device 620. This forms a composite adjustment mechanism with two degrees of freedom: lateral movement and telescopic movement.

[0050] The lateral movement device 620 can drive the telescopic device 610 to move along the length of the first crossbeam 540, thereby adjusting the lateral position of the X-ray emitter 100. Combined with the radial adjustment function of the telescopic device 610, the position of the X-ray emitter 100 can be adjusted within a large range.

[0051] The first adjustment mechanism 600 also includes an angle adjustment device 630, which is connected to the telescopic device 610. The angle adjustment device 630 is used to drive the telescopic device 610 to deflect along the length of the first crossbeam 540, thereby adjusting the emission angle of the X-ray emitter 100.

[0052] The angle adjustment function is particularly suitable for pipes with complex cross-sections or for inspections at special angles. By adjusting the emission angle, different X-ray incident angles can be obtained, improving the defect detection rate.

[0053] Specifically, the lateral movement device 620 includes a guide shaft 621, a lateral movement sleeve 622, a lateral movement seat 623, a lateral movement drive component 624, a lateral movement transmission gear 625, and a lateral movement transmission rack 626. The guide shaft 621 is horizontally mounted on the first crossbeam 540, with both ends fixed to the first crossbeam 540. Specifically, two guide shafts 621 are provided, and the two guide shafts 621 are arranged parallel to each other on the first crossbeam 540. The lateral movement sleeve 622 is slidably mounted on the guide shaft 621. The lateral movement seat 623 is fixed on the lateral movement sleeve 622, and the lateral movement drive component 624 is fixed on the lateral movement seat 623. The lateral movement drive component 624 uses a servo motor, the lateral movement transmission gear 625 is mounted on the power output end of the lateral movement drive component 624, and the lateral movement transmission rack 626 is fixed on the first crossbeam 540 and extends along the length of the first crossbeam 540. The transverse transmission rack 626 is parallel to the guide shaft 621, and the transverse transmission gear 625 meshes with the transverse transmission rack 626 to achieve precise movement of the transverse seat 623 along the length direction of the first crossbeam 540. The transverse movement of the transverse seat 623 can drive the telescopic device 610 and the X-ray emitter 100 to move laterally.

[0054] The telescopic device 610 includes a first support plate 611, a first sliding shaft 612, a first bushing 613, a first limiting plate 614, and a first telescopic drive device 615. The first support plate 611 is mounted on the transverse support 623, and at least two spaced-apart first holes are provided on the first support plate 611. In a preferred embodiment, three triangularly distributed first holes are provided on the first support plate 611 to provide better support stability. The first bushing 613 is aligned with the first holes and mounted on the first support plate 611. The first sliding shaft 612 passes through the first holes and the first bushing 613, with one end extending to the inner side of the first crossbeam 540 and the other end extending to the outer side of the first crossbeam 540. The end of each first sliding shaft 612 extending to the inner side of the first crossbeam 540 is fixedly connected to the X-ray emitter 100, and the end of each first sliding shaft 612 extending to the outer side of the first crossbeam 540 is connected by the first limiting plate 614. The first limit plate 614 ensures the synchronous movement of each sliding shaft and prevents inconsistent extension and retraction.

[0055] The first telescopic drive device 615 is mounted on the first support plate 611. Specifically, the first telescopic drive device 615 adopts an electric push rod or hydraulic cylinder structure. The first telescopic drive device 615 drives the X-ray emitter 100 to perform precise telescopic adjustment.

[0056] An angle adjustment device 630 is used to drive the telescopic device 610 to deflect along the length of the first crossbeam 540, thereby adjusting the emission angle of the X-ray emitter 100. A hinge seat 623a is provided on the transverse sliding seat 623, and an ear plate 611a is provided on the first support plate 611. The ear plate 611a and the hinge seat 623a are hinged together by a rotating shaft. The axis of rotation of the rotating shaft is perpendicular to the axis of the guide shaft 621, allowing the telescopic device 610 to be angled in the vertical plane.

[0057] The angle adjustment device 630 includes a fixed plate 631, an angle adjustment motor 632, a first pulley 633, a second pulley 634, and a synchronous belt 635. The angle adjustment motor 632 is fixed to the transverse support 623 via the fixed plate 631 and employs a precision servo motor to achieve accurate angle control. The first pulley 633 is connected to the power output end of the angle adjustment motor 632, and the second pulley 634 is coaxially fixed to the rotating shaft. The second pulley 634 and the first pulley 633 are spaced apart along the length of the guide shaft 621 and are connected by the synchronous belt 635 to achieve power transmission.

[0058] When the angle adjustment motor 632 is working, it rotates the shaft via belt drive, thereby driving the first support plate 611 and the telescopic device 610 to adjust the angle. Through the operation of the angle adjustment device 630, the emission angle of the X-ray emitter 100 can be precisely adjusted within a certain range to meet the needs of different detection angles and improve the flexibility and comprehensiveness of the detection.

[0059] In some embodiments, a second adjustment mechanism 700 is provided on the second crossbeam 550, and the X-ray detector 200 is mounted on the second adjustment mechanism 700. The second adjustment mechanism 700 is used to move the X-ray detector 200 closer to or further away from the X-ray emitter 100, and works in conjunction with the first adjustment mechanism 600 to achieve bidirectional adjustment of the positions of the emitter and the detector.

[0060] The second adjusting mechanism 700 includes a second support plate 710, a second sliding shaft 720, a second bushing 730, a second limiting plate 740, and a second telescopic drive device 750. The second support plate 710 is disposed on the second crossbeam 550, and at least two spaced second holes are provided on the second support plate 710. The number and arrangement of the second holes correspond to the first holes, and typically three second holes are provided in a triangular distribution.

[0061] The second bushing 730 is aligned with the second hole and fixed on the second support plate 710. The second sliding shaft 720 passes through the second hole and the second bushing 730. One end of the second sliding shaft 720 extends to the inner side of the second crossbeam 550, and the other end extends to the outer side of the second crossbeam 550. The end of each second sliding shaft 720 extending to the inner side of the second crossbeam 550 is connected to the X-ray detector 200, and the end of each second sliding shaft 720 extending to the outer side of the second crossbeam 550 is connected by the second limiting plate 740.

[0062] The second telescopic drive device 750 is mounted on the second support plate 710, and its power output end is connected to the X-ray detector 200. Specifically, the second telescopic drive device 750 is an electric push rod or a hydraulic cylinder structure. The second telescopic drive device 750 adjusts the X-ray detector 200 to move closer to or further away from the X-ray emitter 100. To improve the adjustment accuracy and range of the second adjustment mechanism 700, guide posts 554 are provided on the second crossbeam 550. The guide posts 554 extend along the length of the second crossbeam 550, and both ends of the guide posts 554 are fixed to the second crossbeam 550. The second support plate 710 is slidably mounted on the guide posts 554. Specifically, two guide posts 554 are provided on the second crossbeam 550, and the two guide posts 554 are parallel to each other. In this way, the second adjustment mechanism 700 can not only achieve radial extension and retraction adjustment, but also positional adjustment along the length of the second crossbeam 550, further enhancing the flexibility of the detection.

[0063] In some embodiments, roller assemblies 210 are provided on both sides of the X-ray detector 200. Each roller assembly 210 includes two spaced rollers, the surface of which is higher than the detection surface of the X-ray detector 200. The rolling direction of the rollers is the same as the circumferential direction of the pipe under test. This design allows the X-ray detector 200 to maintain proper contact with the pipe surface, while the rollers can roll along the pipe surface during the rotation of the rotating frame 500, reducing frictional resistance and maintaining a stable detection distance.

[0064] The rollers are made of polyurethane, which has good elasticity and wear resistance. The diameter of the rollers is determined according to the radius of curvature of the pipe. In addition, the roller assembly 210 is connected to the X-ray detector 200 through a spring loading system, which can adapt to the slight unevenness of the pipe surface and maintain a constant distance between the detector and the pipe surface.

[0065] This roller assembly 210 is designed to be particularly suitable for the inspection of large-diameter pipes, ensuring that the X-ray detector 200 maintains a stable relative position with the pipe surface throughout the entire circumferential inspection process, thereby improving inspection accuracy and image quality.

[0066] The external pipeline inspection and flaw detection device of the present invention achieves efficient inspection through the following workflow: First, the pipe to be inspected is inserted inside the first ring 300 and the second ring 400, with the pipe located at the center of the inspection area 510. The power unit 522 is activated, driving the rotating frame 500 to rotate circumferentially along the first ring 300 and the second ring 400. During rotation, the X-ray emitter 100 continuously emits X-rays, which penetrate the pipe and are received by the X-ray detector 200 on the opposite side. According to the specific dimensions of the pipe and the inspection requirements, the distance and angle between the X-ray emitter 100 and the detector are adjusted by the first adjustment mechanism 600 and the second adjustment mechanism 700. The lateral movement device 620 can adjust the emitter position along the length of the first crossbeam 540, the telescopic device 610 can adjust the radial distance of the emitter, and the angle adjustment device 630 can adjust the incident angle of the X-rays. The rotating frame 500 performs a 360-degree circular rotation, achieving full circumferential scanning inspection of the pipe. During the inspection, the X-ray detector 200 continuously acquires transmission image data, and the image processing and analysis system identifies defects and anomalies inside the pipe.

[0067] This application achieves continuous full-circumference scanning inspection of pipelines through the circular rotation of the rotating frame 500, completely solving the problem that traditional fixed inspection devices can only inspect local areas, and significantly improving inspection efficiency and coverage. The design of the first adjustment mechanism 600 and the second adjustment mechanism 700 allows the positions of the X-ray emitter 100 and the X-ray detector 200 to be precisely adjusted according to different pipe diameters, wall thicknesses, and inspection requirements, overcoming the limitations of fixed inspection distance in traditional equipment and significantly improving inspection adaptability and image quality. The coordinated operation of the lateral movement device 620, the telescopic device 610, and the angle adjustment device 630 realizes three-dimensional position adjustment of the X-ray emitter 100, meeting the multi-angle and multi-position inspection needs under complex inspection conditions, and greatly enhancing the flexibility and accuracy of inspection.

[0068] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. An outside detection flaw detection device for a pipe, comprising an X-ray emitter and an X-ray detector, characterized in that, Also includes: First ring body; The second ring body is arranged at a distance from the first ring body, and the pipe to be tested is used to pass through the inside of the first ring body and the second ring body; A rotating frame is disposed between the first ring body and the second ring body. The rotating frame has a detection area inside for pipes to pass through. Along the axial direction of the first ring body, the detection area at least partially overlaps with the inner ring of the first ring body and the inner ring of the second ring body. One end of the rotating frame is slidably connected to the first ring body and the other end is slidably connected to the second ring body. The rotating frame is used to rotate circumferentially along the first ring body and the second ring body. A first adjustment mechanism is provided on the rotating frame. The first adjustment mechanism includes a telescopic device. The telescopic movable end of the telescopic device extends to the inside of the rotating frame. The X-ray emitter is installed on the telescopic movable end of the telescopic device. The X-ray detector is disposed inside the rotating frame. The X-ray emitter and the X-ray detector are distributed relatively at intervals inside the rotating frame. The area between the X-ray emitter and the X-ray detector is the detection area. The telescopic device can move the X-ray emitter closer to or further away from the X-ray detector.

2. The apparatus of claim 1, wherein: The rotating frame includes a first end plate, a second end plate, a first crossbeam, and a second crossbeam. The first end plate and the second end plate are distributed relatively at intervals along the axial direction of the first ring body. The first end plate is located close to the first ring body, and the second end plate is located close to the second ring body. A first slider is provided on the first end plate, and a first annular slide rail is arranged around the first ring body. The first slider is slidably connected to the first annular slide rail. A second slider is provided on the second end plate, and a second annular slide rail is arranged around the second ring body. The second slider is slidably connected to the second annular slide rail. The two ends of the first crossbeam are respectively connected to the first end plate and the second end plate, and the two ends of the second crossbeam are respectively connected to the first end plate and the second end plate. The first crossbeam and the second crossbeam are distributed relatively at intervals between the first end plate and the second end plate. The first adjustment mechanism is installed on the first crossbeam.

3. The apparatus of claim 2, wherein: A power component is provided on the first end plate, and a drive wheel is installed on the power output end of the power component. A first transmission wheel is fixed on the inner side of the first ring body. The first transmission wheel is concentrically arranged with the first ring body. A first through hole for pipe passage is provided in the middle of the first transmission wheel. The drive wheel is connected to the first transmission wheel in a transmission connection.

4. The apparatus of claim 3, wherein: One end of the second crossbeam is provided with a first arm plate extending close to the first ring body. A first support wheel is rotatably mounted on the first arm plate. The first support wheel is connected to the first transmission wheel. The first support wheel and the drive wheel are arranged opposite to each other on both sides of the first transmission wheel.

5. The apparatus of claim 4, wherein: A second drive wheel is provided on the inner side of the second ring body. The second drive wheel is concentric with the second ring body. A second through hole for pipe passage is provided in the middle of the second drive wheel. A second arm plate extending to the second ring body is provided at the other end of the second crossbeam. A second support wheel is rotatably mounted on the second arm plate. The second support wheel is connected to the second drive wheel. The rotation shaft of the first support wheel and the rotation shaft of the second support wheel are connected through a synchronous shaft.

6. The apparatus of claim 2, wherein: The first adjustment mechanism further includes a lateral movement device, which is mounted on the first crossbeam, and the telescopic device is mounted on the lateral movement movable end of the lateral movement device.

7. An apparatus as claimed in claim 6, wherein: The lateral movement device includes a guide shaft, a lateral movement sleeve, a lateral movement seat, a lateral movement drive component, a lateral movement transmission gear, and a lateral movement transmission rack. The guide shaft is horizontally mounted on the first crossbeam, and both ends of the guide shaft are fixed to the first crossbeam. The lateral movement sleeve is slidably mounted on the guide shaft. The lateral movement seat is fixed on the lateral movement sleeve. The lateral movement drive component is fixed on the lateral movement seat. The lateral movement transmission gear is mounted on the power output end of the lateral movement drive component. The lateral movement transmission rack is fixed on the first crossbeam and extends along the length of the first crossbeam. The lateral movement transmission rack is parallel to the guide shaft, and the lateral movement transmission gear meshes with the lateral movement transmission rack for transmission.

8. The apparatus of claim 7, wherein: The telescopic device includes a first support plate, a first sliding shaft, a first bushing, a first limiting plate, and a first telescopic drive device. The first support plate is mounted on the transverse base, and the transverse base is provided with at least two spaced-apart first holes. The first bushing is mounted on the first support plate, aligned with the first holes. The first sliding shaft passes through the first holes and the first bushing. One end of the first sliding shaft extends to the inner side of the first crossbeam, and the other end extends to the outer side of the first crossbeam. The end of each first sliding shaft extending to the inner side of the first crossbeam is fixedly connected to the X-ray emitter, and the end of each first sliding shaft extending to the outer side of the first crossbeam is connected through the first limiting plate. The first telescopic drive device is mounted on the first support plate, and the power output shaft of the first telescopic drive device is connected to the X-ray emitter.

9. An apparatus for inspecting an outside of a pipeline according to claim 8, characterized in that: The first adjustment mechanism further includes an angle adjustment device, which is connected to the telescopic device and is used to drive the telescopic device to deflect along the length direction of the first crossbeam.

10. The apparatus of claim 9, wherein: The transverse support is provided with a hinge seat, and the first support plate is provided with an ear plate. The ear plate is hinged to the hinge seat through a rotating shaft. The rotation axis of the rotating shaft is perpendicular to the axis of the guide shaft. The angle adjustment device includes a fixed plate, an angle adjustment motor, a first pulley, a second pulley, and a synchronous belt. The angle adjustment motor is fixed to the transverse support through the fixed plate. The first pulley is connected to the power output end of the angle adjustment motor. The second pulley is coaxially fixed to the rotating shaft. The second pulley and the first pulley are spaced apart along the length direction of the guide shaft. The synchronous belt connects the first pulley and the second pulley.

11. The apparatus of claim 2, wherein: A second adjustment mechanism is provided on the second crossbeam, and the X-ray detector is mounted on the second adjustment mechanism. The second adjustment mechanism is used to move the X-ray detector closer to or away from the X-ray emitter.

12. The apparatus of claim 11, wherein: The second adjustment mechanism includes a second support plate, a second sliding shaft, a second bushing, a second limiting plate, and a second telescopic drive device. The second support plate is disposed on the second crossbeam and has at least two spaced second holes. The second bushing is aligned with the second holes and fixed to the second support plate. The second sliding shaft passes through the second holes and the second bushing, with one end extending to the inner side of the second crossbeam and the other end extending to the outer side of the second crossbeam. The end of each second sliding shaft extending to the inner side of the second crossbeam is connected to the X-ray detector, and the end of each second sliding shaft extending to the outer side of the second crossbeam is connected through the second limiting plate. The second telescopic drive device is mounted on the second support plate, and the power output shaft of the second telescopic drive device is connected to the X-ray detector.

13. The apparatus of claim 12, wherein: A guide post is provided on the second crossbeam. The guide post extends along the length of the second crossbeam and its two ends are fixed to the second crossbeam. The second support plate is slidably assembled on the guide post.

14. The apparatus of claim 1, wherein: Roller assemblies are provided on both sides of the X-ray detector. Each roller assembly includes two spaced rollers. The surface of each roller is higher than the detection surface of the X-ray detector, and the rolling direction of the rollers is the same as the circumferential direction of the pipe to be tested.

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