Annular CT detection device

Abstract

The utility model discloses an annular CT (Computed Tomography) detection device which is characterized in that a first C-shaped arm guide rail is arranged on a C-shaped guide rail sliding seat; the first driving servo motor speed reducer is fixed on the C-shaped guide rail sliding seat to drive the first C-shaped arm guide rail to slide along a set track, and the opening direction of the first C-shaped arm guide rail is adjusted; the second C-shaped arm guide rail is mounted on the first C-shaped arm guide rail and can rotate relatively; a second driving servo motor speed reducer is fixed on the second C-shaped arm guide rail to drive the second C-shaped arm guide rail to slide on the first C-shaped arm guide rail; the X-ray machine and the detector are both mounted on the second C-shaped arm guide rail; x-rays emitted by the X-ray machine are incident to a to-be-detected object in the second C-shaped arm guide rail, and the detector receives the X-rays penetrating through the to-be-detected object to obtain projection data of the to-be-detected object. According to the device, on the premise that the pipeline is not disassembled, visual non-contact nondestructive detection on the interior of a pipeline cavity is achieved, and the accuracy of internal defect positioning and analysis is improved.

Description

Technical Field

[0001] This utility model belongs to the field of non-destructive testing technology and relates to a ring CT inspection device, mainly for non-contact non-destructive testing of pipelines, mechanical equipment, etc. Background Technology

[0002] Currently, two-dimensional X-ray inspection (DR) technology has some applications in pipeline or closed equipment inspection. However, due to its difficulty in distinguishing overlapping images generated during the inspection process, it is difficult to determine whether there are defects in parts or looseness in small components. Furthermore, DR inspection technology is limited by its two-dimensional imaging properties, making it unable to directly inspect the overall performance and condition of the equipment's interior. Computed tomography (CT) imaging, with its advantages of being non-destructive, accurate, and providing three-dimensional visualization, is widely used in industrial, medical, and security inspection fields. CT image reconstruction is the process of obtaining tomographic images of an object's interior from its projection data. Conventional detectors cannot rotate or move during operation, and cannot cover the entire pipeline or equipment, resulting in truncation of projection data in the detector direction. This leads to incomplete projection data, and using ordinary reconstruction methods to reconstruct incomplete data often yields results that are impossible to reconstruct or have very poor reconstruction quality, failing to meet the requirements of accurate inspection. When inspecting regular materials, a method of assembling a ring track on the material surface is often used. The ring track is usually fixed to the material by a rigid connection, and the inspection device rotates along the ring track for inspection.

[0003] Traditional testing methods require assembling and fixing the track to the material being tested. In situations where a secure fixation is not possible, the rotation of the equipment can affect image quality or pose safety hazards. Furthermore, testing is impossible in situations where contact with the material is prohibited. Changing the testing area during testing necessitates complete disassembly and reassembly of the entire device. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide a ring-shaped CT detection device. This invention utilizes the relative motion of the sample, the X-ray source, and the detector to acquire CT projection data and thereby reconstruct CT images.

[0005] This invention employs a non-contact, double-C-opening detection device. During detection, there is no need to install a robotic arm or supporting equipment; the detection device is directly moved to the position to be detected. The X-ray machine and detector remain relatively fixed, with consistent geometric parameters, eliminating the need for repeated calibration and ensuring stable imaging. Since the device does not come into contact with the material during detection, there are no safety hazards.

[0006] To overcome the incompleteness of projection data acquired by conventional CT imaging equipment, this invention employs a novel rotating and moving mechanism.

[0007] This invention's detection device utilizes a C-shaped guide rail slide 2, a first C-shaped arm guide rail 6, a second C-shaped arm guide rail 5, a first drive servo motor reducer 4, a second drive servo motor reducer 3, an X-ray machine 1, and a detector 7. The C-shaped guide rail slide serves as a fixed support for the detection device. This support can be connected to a carrier or fixed using other methods. When the detection device is fixed to a movable trolley, it facilitates rapid movement and positioning, improving detection efficiency. The detection equipment is height-adjustable, solving the problem of equipment height adjustment. The first C-shaped arm guide rail 6 cooperates with the C-shaped guide rail slide 2, sliding along it. The first drive servo motor reducer 4 is fixed to the C-shaped guide rail slide 2, driving the first C-shaped arm guide rail 6. The second C-shaped arm guide rail 5 overlaps with the first C-shaped arm guide rail 6, allowing the two C-shaped arm guide rails to rotate relative to each other. The second drive servo motor reducer 3 is fixed on the second C-arm guide rail 5. The output gear of the second servo drive motor 3 meshes with the outer gear ring of the first C-arm guide rail 6, driving the second C-arm guide rail 5, the servo drive motor 3, the X-ray machine 1, and the detector 7 to move simultaneously around the first C-arm guide rail 6. The X-ray machine 1 and the detector 7 are relatively fixed on the second C-arm guide rail 5, with fixed geometric parameters, eliminating the need for repeated calibration. It can rotate around the double C-arm guide rails and the transverse axis, allowing for the inspection of pipes in any direction. The double C-shaped guide rail design facilitates placing the material or equipment to be inspected within the imaging field of view when the pipe is open; during scanning, it can rotate 360 ​​degrees around the pipe to achieve a complete CT scan. The second servo drive motor 3 and the first servo drive motor 4 can rotate simultaneously in the same direction or in opposite directions to facilitate adjusting the opening orientation and performing detection operations. The first drive servo motor reducer 4 adjusts the opening direction of the first C-arm guide rail 6. The opening size of the first C-arm guide rail 6 and the second C-arm guide rail 5 is fixed, while the feeding opening direction and the feeding opening angle can be adjusted. When the openings of the first C-arm guide rail 6 and the second C-arm guide rail 5 overlap, the feeding opening angle is up to 180°. The feeding opening angle is 0° to 180°. The first drive servo motor reducer 4 and the second drive servo motor reducer 3 work together to achieve 360° scanning rotation.

[0008] The technical solution of this utility model is as follows:

[0009] A ring-shaped CT detection device, characterized in that it includes an X-ray machine 1, a C-shaped guide rail slide 2, a first C-shaped arm drive servo motor reducer 4, a first C-shaped arm guide rail 6, a second C-shaped arm drive servo motor reducer 3, a second C-shaped arm guide rail 5, and a detector 7.

[0010] The first C-shaped arm guide rail 6 is mounted on the C-shaped guide rail slide 2;

[0011] The first drive servo motor reducer 4 is fixed on the C-shaped guide rail slide 2 and is used to drive the first C-shaped arm guide rail 6 to slide along the trajectory set by the C-shaped guide rail slide 2 and adjust the opening direction of the first C-shaped arm guide rail 6.

[0012] The second C-arm guide rail 5 is mounted on the first C-arm guide rail 6, and the second C-arm guide rail 5 and the first C-arm guide rail 6 can rotate relative to each other;

[0013] The second drive servo motor reducer 3 is fixed on the second C-arm guide rail 5 and is used to drive the second C-arm guide rail 5 to slide on the first C-arm guide rail 6;

[0014] The X-ray machine 1 and the detector 7 are both mounted on the second C-arm guide rail 5 and rotate with the second C-arm guide rail 5;

[0015] The X-ray machine 1 is used to emit X-rays and project them onto the object to be inspected, which is placed inside the second C-arm guide rail 5, to scan the object to be inspected.

[0016] The detector 7 is used to receive X-rays passing through the object to be detected and to obtain projection data of the object to be detected.

[0017] Furthermore, the second C-arm guide rail 5 and the first C-arm guide rail 6 can rotate 360° relative to each other, for rotating around the object to be inspected 360 degrees.

[0018] Furthermore, the overlap between the opening of the second C-arm guide rail 5 and the opening of the first C-arm guide rail 6 is equal to the angle of the feed opening, and the object to be tested is placed inside the second C-arm guide rail 5 through the feed opening.

[0019] Furthermore, the angle range of the feed opening is 0° to 180°.

[0020] Furthermore, it also includes a movable device, which is connected to the C-shaped guide rail slide 2.

[0021] Furthermore, the trajectory set by the C-shaped guide rail slide 2 is an arc-shaped trajectory, so that the first C-shaped arm guide rail 6 can rotate around the axis of the arc-shaped trajectory.

[0022] Furthermore, the object to be detected is a pipe or a suspended object.

[0023] The advantages of this utility model are as follows:

[0024] This invention utilizes the principle of X-ray imaging combined with CT reconstruction algorithms to achieve three-dimensional imaging. Without disassembling pipes and equipment, it enables visualized, non-contact, and non-destructive testing of pipe cavities and equipment interiors, improving the accuracy of internal defect location and analysis, and providing a reliable basis for equipment condition-based maintenance decisions. Attached Figure Description

[0025] Figure 1This is a structural diagram of a ring-shaped CT scanner.

[0026] Figure 2 This is a diagram showing the state of the ring CT scanner before testing.

[0027] Figure 3 This is a diagram showing the status of the ring CT scanner during testing.

[0028] Reference numerals: 1-X-ray machine; 2-C-type guide rail slide; 3-Second drive servo motor reducer; 4-First drive servo motor reducer; 5-Second C-type arm guide rail; 6-First C-type arm guide rail; 7-Detector; 8-Object to be inspected; 9-Detection device. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0030] like Figure 1 As shown, the detection device includes an X-ray machine 1, a C-shaped guide rail slide 2, a second drive servo motor reducer 3, a first drive servo motor reducer 4, a second C-shaped arm guide rail 5, a first C-shaped arm guide rail 6, and a detector 7. The first C-shaped arm guide rail 6 cooperates with the C-shaped guide rail slide 2 and can slide along the C-shaped guide rail slide 2. The first drive servo motor reducer 4 is fixed on the C-shaped guide rail slide 2 to drive the first C-shaped arm guide rail 6. The second C-shaped arm guide rail 5 overlaps with the first C-shaped arm guide rail 6, and the two C-shaped arm guide rails can rotate relative to each other. The second drive servo motor reducer 3 is fixed on the second C-shaped arm guide rail 5 to drive the second C-shaped arm guide rail 5. The X-ray machine 1 and the detector 7 are relatively fixed on the second C-shaped arm guide rail 5 and can rotate around the transverse axis of the double C-shaped guide rails, allowing detection in any direction of the pipeline.

[0031] exist Figure 2 In the image, the object to be tested (8) is on the left, and the testing device (9) is on the right. Adjust the inlet of the testing device (9) to face the object to be tested; the inlet angle of the testing device is 0°-180°.

[0032] exist Figure 3 In the process, the state of the ring CT detection device during detection is determined by... Figure 3 The detection device is moved to the left, and during detection, the double C-arms place the object to be detected in the imaging field of view; during scanning, it can rotate 360 ​​degrees around the tube to achieve a complete CT scan.

[0033] Traditional testing methods require assembling and fixing the track to the material being tested. In situations where a secure fixation is not possible, the rotation of the equipment can affect image quality or pose safety hazards. Furthermore, testing is impossible in situations where material contact is not permitted. Changing the testing area requires complete disassembly and reassembly of the entire device. To address these shortcomings, this invention employs a non-contact, double-C-opening testing device. During testing, no installation is required; a robotic arm or support device directly moves the device to the testing position. The X-ray machine and detector remain relatively fixed, with consistent geometric parameters, eliminating the need for repeated calibration and ensuring stable imaging. Since the device does not contact the material during testing, there are no safety hazards.

[0034] Although specific embodiments of the present invention have been disclosed for illustrative purposes to aid in understanding and implementing the invention, those skilled in the art will understand that various substitutions, variations, and modifications are possible without departing from the spirit and scope of the invention and the appended claims. Therefore, the invention should not be limited to the content disclosed in the preferred embodiments, and the scope of protection claimed by the invention is defined by the claims.

Claims

1. A ring-shaped CT detection device, characterized in that, It includes an X-ray machine (1), a C-shaped guide rail slide (2), a first drive servo motor reducer (4), a first C-shaped arm guide rail (6), a second drive servo motor reducer (3), a second C-shaped arm guide rail (5), and a detector (7); The first C-shaped arm guide rail (6) is mounted on the C-shaped guide rail slide (2); The first drive servo motor reducer (4) is fixed on the C-shaped guide rail slide (2) and is used to drive the first C-shaped arm guide rail (6) to slide along the trajectory set by the C-shaped guide rail slide (2) and adjust the opening direction of the first C-shaped arm guide rail (6); The second C-arm guide rail (5) is mounted on the first C-arm guide rail (6), and the second C-arm guide rail (5) and the first C-arm guide rail (6) can rotate relative to each other; The second drive servo motor reducer (3) is fixed on the second C-arm guide rail (5) and is used to drive the second C-arm guide rail (5) to slide on the first C-arm guide rail (6); The X-ray machine (1) and the detector (7) are both mounted on the second C-arm guide rail (5) and rotate with the second C-arm guide rail (5); The X-ray machine (1) is used to emit X-rays and project them onto the object to be inspected, which is placed in the second C-arm guide rail (5), to scan the object to be inspected. The detector (7) is used to receive X-rays passing through the object to be detected and to obtain projection data of the object to be detected.

2. The ring-shaped CT detection device according to claim 1, characterized in that, The second C-arm guide rail (5) can rotate 360° relative to the first C-arm guide rail (6) for rotating around the object to be tested 360 degrees.

3. The ring-shaped CT detection device according to claim 1, characterized in that, The overlap between the opening of the second C-arm guide rail (5) and the opening of the first C-arm guide rail (6) is the angle of the feed opening, and the object to be tested is placed inside the second C-arm guide rail (5) through the feed opening.

4. The ring-shaped CT detection device according to claim 3, characterized in that, The angle range of the feed opening is 0° to 180°.

5. The ring-shaped CT detection device according to claim 1, 2, or 3, characterized in that, It also includes a movable device, which is connected to the C-shaped guide rail slide (2).

6. The ring-shaped CT detection device according to claim 1, 2, or 3, characterized in that, The trajectory set by the C-shaped guide rail slide (2) is an arc trajectory, so that the first C-shaped arm guide rail (6) can rotate around the axis of the arc trajectory.

7. The ring-shaped CT detection device according to claim 1, 2, or 3, characterized in that, The object to be tested is a pipe or a suspended object.

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