A radiographic device for non-destructive testing of pipes

Abstract

The utility model discloses a pipeline nondestructive testing is with ray detection device belongs to pipeline ray detection technical field, and the both ends of inner support frame are connected with three supporting legs respectively, and the outer end of every supporting leg is connected with the moving wheel, and the both ends two supporting legs are installed with servo motor, and servo motor is connected with the moving wheel through transmission assembly, and realizes the moving wheel in the detection pipeline movement through servo motor, transmission assembly, and the both ends of outer layer protection pipe sleeve are set up first gap, second gap respectively, and the lateral wall of outer layer protection pipe sleeve is set up with the through slot of supporting leg adaptation, and the mouth of outer layer protection pipe sleeve is connected with the connecting support rod. The stability of moving mechanism and the comprehensiveness of detection system cooperate, ensure the detection data accurate, adapt to a variety of pipe diameter and pipeline environment, promote the nondestructive testing scene applicability, and the accurate positioning is combined with multidirectional detection, realizes fixed point acquisition and scanning, and combines external system analysis, and accurately identifies the defect type and position, and generates reliable detection report.

Description

Technical Field

[0001] This utility model relates to the field of pipeline X-ray inspection technology, and in particular to a X-ray inspection device for non-destructive testing of pipelines. Background Technology

[0002] Non-destructive testing (NDT) of pipelines is a technique that uses physical or chemical methods to detect internal or surface defects (such as cracks, porosity, inclusions, etc.) and material properties of pipelines without damaging their performance or structural integrity. Its main purpose is to ensure safe pipeline operation, assess service life, and prevent accidents. Common methods include radiographic testing, ultrasonic testing, magnetic particle testing, penetrant testing, and eddy current testing.

[0003] Radiographic testing equipment utilizes radiation (X-rays, gamma rays, etc.) to penetrate pipes and form images based on the differences in absorption of radiation by materials of different densities, thus identifying defects. It mainly consists of radiation sources (such as portable X-ray machines, gamma-ray sources (cobalt-60, iridium-192, etc.)), detectors (film, digital detectors (DR / CR)), and auxiliary equipment (protective lead plates, positioning supports, image processing systems). It is suitable for detecting volumetric defects (porosity, slag inclusions, incomplete penetration, etc.) in pipe welds and base material, offering intuitive and archival advantages, making it an important means of non-destructive testing for pipelines.

[0004] When a radiographic inspection device for pipeline non-destructive testing is inserted into and moves along a pipeline, traditional devices have relatively fixed size and structure, making it difficult to match small-diameter or irregularly shaped (such as reducing diameter or bending) pipelines, and unable to enter narrow or complex cross-section pipelines. When the inner wall of the pipeline is rough, has welds, deposits, or bends, traditional moving mechanisms such as wheeled or tracked devices are prone to slipping, jamming, or turning difficulties, making it difficult to achieve continuous and stable movement. When relying on external cables for power, the cable length limits the movement distance and is prone to tangling; wireless power supply technology has insufficient power and is difficult to drive core components such as X-ray sources and detectors to work for a long time; the device is easily affected by the irregularity of the inner wall of the pipe during movement, and the attitude shift causes the relative position of the X-ray source and detector to change, resulting in blurred detection images and artifacts, reducing the accuracy of defect identification. The interior of the pipeline is enclosed and dark, lacking real-time visual feedback, making it difficult to plan the movement path of the remote control device, which is prone to deviating from the detection area or missing detection; it has poor tolerance to extreme environments such as corrosive media, high temperature, and high pressure inside the pipeline, and the device materials are easily damaged, affecting the reliability and service life of the detection; if the device is stuck or malfunctions inside the pipeline, it is difficult to remove, the risk of radiation source leakage is high, and the maintenance or recovery operation is complicated, posing radiation safety hazards. Utility Model Content

[0005] The main objective of this invention is to provide a radiographic testing device for pipeline non-destructive testing, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A radiographic testing device for non-destructive testing of pipelines includes an outer protective sleeve and an inner support frame. The inner support frame is placed in the cavity of the outer protective sleeve and is located on the inner central axis of the outer protective sleeve. The inner support frame is connected to three legs at each end, and each leg is connected to a movable wheel at its outer end. A servo motor is installed on the two legs at both ends. The servo motor is connected to the movable wheel through a transmission assembly. The movable wheel moves inside the pipe to be tested through the servo motor and the transmission assembly. The outer protective sleeve has a first notch and a second notch at both ends, and the side wall of the outer protective sleeve has a through groove adapted to the support foot. A connecting rod is connected to the pipe opening of the outer protective sleeve, and a support is installed in the middle section of the connecting rod. A visual inspection component and a radiographic inspection component are installed at both ends of the support. The visual inspection component and the radiographic inspection component are aligned with the first notch and the second notch to perform inspection operation on the pipe to be inspected.

[0007] In an optional embodiment of this application, the inner support frame and the outer protective sleeve are designed coaxially, with three legs at both ends ringed on the inner support frame and the three legs passing through the through groove of the outer protective sleeve, and a buffer anti-slip sleeve is provided at the through groove. In an optional embodiment of this application, two first notches are symmetrically distributed on the quadrant points of one end of the outer protective sleeve, and two second notches are symmetrically distributed on the quadrant points of the other end of the outer protective sleeve, with the port extension lines of the first notches and the port extension lines of the second notches being perpendicular to each other. In an optional embodiment of this application, the transmission assembly includes a connecting shaft and a transmission gear set. The connecting shaft is bolted to the output end of the servo motor, and the transmission gear set includes a helical gear and a transmission gear. The helical gear and the transmission gear are respectively mounted on the transmission shaft and the rotating shaft of the moving wheel, thereby realizing the rotation of the moving wheel. In an optional embodiment of this application, the connecting rod is bolted to the outer protective sleeve, the connecting rod is connected to the port extension line of the notch, the connecting rod and the support of the detection system are connected by threads, and the position is adjusted along the connecting rod; In an optional embodiment of this application, the visual inspection component and the ray inspection component are respectively aligned with the two openings of the first notch or the two openings of the second notch to detect different positions on the inner wall of the pipe.

[0008] Compared with the prior art, the present invention has the following beneficial effects: The inner support frame and the outer protective sleeve are coaxially designed, and with the evenly distributed ring-shaped support feet and buffer anti-slip sleeve, the structural stability and centering performance are enhanced, ensuring smooth movement. The servo motor drives the transmission components (connecting shaft, helical gear and transmission gear set) to drive the moving wheels, realizing autonomous walking and precise positioning, ensuring that the equipment moves smoothly in the pipeline and is accurately positioned to the detection area. The dustproof and sealing design at the through groove improves the adaptability to different pipeline environments.

[0009] The extension lines of the first and second notches are perpendicular. The vision and X-ray inspection components are respectively aligned with the notch openings, covering multiple areas of the inner wall of the pipe to achieve comprehensive image acquisition and defect scanning. The support can be adjusted along the connecting rod to adapt to different pipe diameters or inspection requirements, and the direction of the inspection components can be adjusted to match the inspection range. The vision and X-ray inspection components work synchronously to acquire images and scan defects in real time. The data is transmitted to an external system for analysis to accurately identify the type and location of defects.

[0010] The pipeline moving mechanism and the pipeline inspection system work together. The autonomous movement and precise positioning of the moving mechanism, combined with the multi-directional coverage of the inspection system, enable multi-directional and efficient non-destructive testing of the pipeline inner wall. The stability of the moving mechanism and the comprehensiveness of the inspection system work together to ensure accurate test data, adapt to various pipe diameters and pipeline environments, and improve the applicability of non-destructive testing scenarios. The combination of precise positioning and multi-directional inspection enables fixed-point acquisition and scanning. Combined with external system analysis, it accurately identifies defect types and locations, and generates reliable inspection reports. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a diagram illustrating the mobile system of this utility model; Figure 3 This is a side view of the mobile system of this utility model; Figure 4 This is a diagram illustrating the outer protective sleeve and detection system of this utility model.

[0012] In the diagram: 1. Outer protective sleeve; 2. Inner support frame; 3. Support leg; 4. Caster wheel; 5. Transmission assembly; 6. Servo motor; 7. First notch; 8. Second notch; 9. Through groove; 10. Connecting support rod; 11. Visual inspection assembly; 12. X-ray inspection assembly; 13. Cavity. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0014] like Figure 1 - Figure 4As shown, a radiographic testing device for pipeline non-destructive testing mainly consists of an outer protective sleeve 1 and an inner support frame 2. The inner support frame 2 is disposed in the cavity 13 inside the outer protective sleeve 1 and is precisely located on the central axis of the outer protective sleeve 1 to ensure the stability and alignment performance of the overall structure.

[0015] The inner support frame 2 has three evenly distributed ring-shaped support legs 3 connected to its two ends, and each support leg 3 has a movable wheel 4 mounted on its outer end. A servo motor 6 is mounted on each of the two support legs 3. The servo motor 6 is connected to the movable wheel 4 through a transmission component 5. Through the drive of the servo motor 6 and the transmission of the transmission component 5, the movable wheel 4 can move autonomously and be precisely positioned inside the pipe to be inspected.

[0016] The outer protective sleeve 1 has a first notch 7 and a second notch 8 at both ends, and its side wall has a through groove 9 that matches the support leg 3. The support leg 3 extends to the outside through the through groove 9, and a buffer anti-slip sleeve is provided at the through groove 9 to enhance adaptability and stability. A connecting support rod 10 is installed at the pipe opening of the outer protective sleeve 1. A support is provided in the middle section of the connecting support rod 10. A visual inspection component 11 and a radiographic inspection component 12 are respectively installed at both ends of the support. The visual inspection component 11 and the radiographic inspection component 12 are aligned with the first notch 7 and the second notch 8, respectively, to achieve non-destructive inspection of the inner wall of the pipe.

[0017] The inner support frame 2 and the outer protective sleeve 1 are coaxially designed to ensure uniform force distribution and smooth movement. The three support legs 3 at both ends are fixed in a ring shape to the inner support frame 2 and pass through the corresponding through grooves 9 on the outer protective sleeve 1. In addition to being equipped with a buffer anti-slip sleeve, the through grooves 9 are also designed for dust prevention and sealing to adapt to different pipeline environments.

[0018] Two first notches 7 are symmetrically distributed at the quadrant points of one end of the outer protective sleeve 1, and two second notches 8 are also symmetrically distributed at the quadrant points of the other end of the protective sleeve. The extension lines of the ports of the first notches 7 and the extension lines of the ports of the second notches 8 are perpendicular to each other, thereby allowing the detection component to cover areas of the inner wall of the pipe in multiple directions.

[0019] The transmission assembly 5 mainly includes a connecting shaft and a transmission gear set. The connecting shaft is fastened to the output end of the servo motor 6 by bolts. The transmission gear set consists of helical gears and transmission gears, which are respectively installed on the transmission shaft and the rotating shaft of the moving wheel 4 to realize power transmission and direction conversion, and finally drive the moving wheel 4 to rotate.

[0020] The connecting rod 10 is fixed to the outer protective sleeve 1 by bolts, and its direction is consistent with the extension line of the notch port. The support and the connecting rod 10 are connected by threads, and the position can be adjusted along the connecting rod 10 to facilitate adjustment of the orientation of the vision and X-ray inspection component 12 according to different pipe diameters or inspection requirements.

[0021] The visual inspection component 11 and the X-ray inspection component 12 can be aligned with the two openings of the first notch 7 or the two openings of the second notch 8, respectively, so as to perform comprehensive image acquisition and defect scanning of different positions of the inner wall of the pipe, which is suitable for a variety of non-destructive testing scenarios.

[0022] The inner support frame 2 is installed in the cavity 13 inside the outer protective sleeve 1, ensuring that the inner support frame 2 is precisely located on the central axis of the outer protective sleeve 1, achieving a coaxial design. A buffer anti-slip sleeve and a dustproof seal are installed in the through groove 9 on the side wall of the outer protective sleeve 1. The three evenly distributed annular support legs 3 at both ends of the inner support frame 2 pass through the corresponding through grooves 9 and extend to the outside of the outer protective sleeve 1. Movable wheels 4 are installed at the outer ends of the support legs 3, and servo motors 6 are installed on the support legs 3 at both ends. The servo motors 6 and the movable wheels 4 are connected by a transmission assembly 5. The connecting shaft of the transmission assembly 5 is connected to the servo motors 6 by bolts. The output end is fastened, and the helical gear and transmission gear of the transmission gear set are respectively installed on the drive shaft and the rotating shaft of the moving wheel 4; the connecting support rod 10 is fixed to the pipe opening position of the outer protective sleeve 1 by bolts, ensuring that the direction of the connecting support rod 10 is consistent with the port extension line of the first notch 7 / second notch 8; a support is installed in the middle section of the connecting support rod 10 by threaded connection, and a visual inspection component 11 and a X-ray inspection component 12 are respectively installed at both ends of the support. The position of the support is adjusted so that the visual inspection component 11 is aligned with the first notch 7 and the X-ray inspection component 12 is aligned with the second notch 8 (the port extension lines of the first notch 7 and the second notch 8 are perpendicular).

[0023] Check the equipment assembly status: Confirm that the support legs 3, casters 4, servo motor 6, transmission assembly 5, vision inspection assembly 11, and X-ray inspection assembly 12 are firmly connected, and that the outer protective sleeve 1 has a good seal at the through groove 9; Adjust the position of the support on the connecting rod 10 by rotating the support according to the diameter of the pipe to be inspected, and adjust the orientation of the vision inspection assembly 11 and X-ray inspection assembly 12 to match the inspection range; Place the equipment into the pipe to be inspected, start the servo motor 6, and drive the casters 4 to move autonomously along the inner wall of the pipe through the transmission assembly 5. The servo motor 6 controls the equipment to be precisely positioned in the inspection area; During the movement and positioning process, the vision inspection assembly 11 acquires images of the inner wall of the pipe through the first notch 7, and the X-ray inspection assembly 12 performs defect scanning through the second notch 8, covering multiple directional areas.

[0024] Confirm that the inner support frame 2 and the outer protective sleeve 1 are coaxial, the support leg 3 and the through groove 9 are well sealed, and the moving wheel 4, servo motor 6, and transmission component 5 are functioning normally. Adjust the support position so that the visual inspection component 11 is aligned with the two openings of the first notch 7 and the X-ray inspection component 12 is aligned with the two openings of the second notch 8, adapting to the pipe diameter. Place the equipment at the starting position of the pipe to be inspected, initialize the servo motor 6, and test the walking stability by letting the moving wheel 4 idle. The servo motor 6 drives the moving wheel 4 to walk along the inner wall of the pipe, and the visual inspection component 11 acquires the inner wall image of the area covered by the first notch 7 in real time; the X-ray inspection component 12 scans the area covered by the second notch 8 simultaneously, detecting inner wall defects through X-ray penetration; the servo motor 6 controls the equipment to stop at a designated position according to the preset program, performing fixed-point image acquisition and defect scanning, covering multiple directions of the inner wall of the pipe. The visual inspection component 11 and the X-ray inspection component 12 transmit the data to an external system, which analyzes the images and X-ray scan results, identifies the defect type and location; after the inspection is completed, the servo motor 6 drives the equipment to walk in reverse to exit the pipe, the power is turned off, the inspection data is exported, and a report is generated.

[0025] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A radiographic testing device for non-destructive testing of pipelines, comprising an outer protective sleeve (1) and an inner support frame (2), wherein the inner support frame (2) is placed in the cavity (13) of the outer protective sleeve (1) and the inner support frame (2) is located on the inner central axis of the outer protective sleeve (1), characterized in that: The inner support frame (2) is connected to three legs (3) at both ends respectively. Each leg (3) is connected to a movable wheel (4) at its outer end. A servo motor (6) is installed on the two legs (3) at both ends. The servo motor (6) is connected to the movable wheel (4) through a transmission assembly (5). The movable wheel (4) moves inside the pipe to be tested through the servo motor (6) and the transmission assembly (5). The outer protective sleeve (1) has a first notch (7) and a second notch (8) at both ends, and the side wall of the outer protective sleeve (1) has a through groove (9) adapted to the support (3). The pipe opening of the outer protective sleeve (1) is connected to a connecting rod (10), and a support is installed in the middle section of the connecting rod (10). Visual inspection component (11) and X-ray inspection component (12) are installed at both ends of the support. The visual inspection component (11) and X-ray inspection component (12) are aligned with the first notch (7) and the second notch (8) to perform inspection operation on the pipeline to be inspected.

2. The radiographic testing device for non-destructive testing of pipelines according to claim 1, characterized in that: The inner support frame (2) and the outer protective sleeve (1) are designed coaxially. The three legs (3) at both ends are ringed on the inner support frame (2). The three legs (3) pass through the through groove (9) of the outer protective sleeve (1). A buffer anti-slip sleeve is provided at the through groove (9).

3. The radiographic testing device for pipeline non-destructive testing according to claim 2, characterized in that: Two first gaps (7) are symmetrically distributed on the quadrant point of one end of the outer protective sleeve (1), and two second gaps (8) are symmetrically distributed on the quadrant point of the other end of the outer protective sleeve (1). The port extension line of the first gap (7) is perpendicular to the port extension line of the second gap (8).

4. The radiographic testing device for pipeline non-destructive testing according to claim 3, characterized in that: The transmission assembly (5) includes a connecting shaft and a transmission gear set. The connecting shaft is bolted to the output end of the servo motor (6). The transmission gear set includes a helical gear and a transmission gear. The helical gear and the transmission gear are respectively mounted on the transmission shaft and the rotating shaft of the moving wheel (4), thereby realizing the rotation of the moving wheel (4).

5. The radiographic testing device for pipeline non-destructive testing according to claim 4, characterized in that: The connecting rod (10) is installed on the outer protective sleeve (1) by bolts. The connecting rod (10) is connected to the port extension line of the notch. The connecting rod (10) and the support of the detection system are connected by threads and the position is adjusted along the connecting rod (10).

6. The radiographic testing device for pipeline non-destructive testing according to claim 5, characterized in that: The visual inspection component (11) and the X-ray inspection component (12) are respectively aligned with the two openings of the first notch (7) or the two openings of the second notch (8) to detect different positions on the inner wall of the pipe.

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