Automatic ray detection system and method for large-diameter pipeline

Abstract

The invention discloses an automatic ray detection system and method for a large-diameter pipeline, and the system comprises a housing, the housing sleeves the outer wall of the pipeline, the inner wall of the housing is provided with a moving assembly used for contacting the outer wall of the pipeline, one side of the housing is provided with a ray emission assembly, and the ray emission assembly is provided with a welding seam scanning positioner. And a ray receiving assembly is arranged on the symmetrical side of the side of the shell. According to the automatic ray detection system and method for the large-diameter pipeline, the automatic sheet loading and unloading functions of the ray receiving device are introduced, manual operation in the detection process is reduced, errors and risks caused by manual intervention are reduced, meanwhile, the magnetic type universal wheels are additionally arranged, flexible movement of the ray detection system is achieved, and the detection efficiency is improved. By means of the integrated design of the ray device and the ray receiving device, the detection precision is improved, the detection time is remarkably shortened, and repeated labor is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline automatic ray detection, and in particular to a large-caliber pipeline automatic ray detection system and method. Background Art

[0002] In the field of industrial pipeline construction and maintenance, the inspection of large-diameter pipelines is one of the key links to ensure pipeline quality and safe operation. Traditional large-diameter pipeline radiographic inspection methods usually use film-type radiographic inspection technology, which requires manual operation of the radiographic machine and manual attachment of the film. The entire process requires at least two workers to work together: one is responsible for attaching the film and the other is responsible for operating the radiographic machine. This manual operation method is not only inefficient, but also has many safety hazards. Due to the radiation characteristics of the rays, the operator is always at risk of being irradiated during the inspection process, which poses a serious threat to the health of the workers.

[0003] In addition, the traditional film-based X-ray detection method has many technical limitations. For example, inaccurate film attachment position, incorrect placement of the X-ray machine, inadequate film protection measures, and difficulty in accessing the detection position may all lead to deviations in the detection results. These problems will not only increase the scrap rate, but also lead to reshoots or even inability to complete the detection, which will seriously affect the quality, progress and efficiency of X-ray detection. Ultimately, these problems will be directly reflected in the progress of pipeline welding construction, and may even cause delays in the construction period, causing huge economic losses to the project construction.

[0004] Therefore, in order to solve the many problems existing in traditional film-based X-ray detection, improve detection efficiency and safety, reduce the scrap rate and re-shooting rate, and ensure the smooth progress of pipeline welding construction, it is urgently necessary to develop a device that can achieve stable and accurate X-ray detection process and patch operation. Summary of the invention

[0005] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a large-diameter pipeline automatic radiation detection system and method that is significantly different from the existing technical solutions to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an automated radiation detection system for large-diameter pipelines, comprising a shell, which is sleeved on the outer wall of the pipeline, and a movable component for contacting the outer wall of the pipeline is installed on the inner wall of the shell, a radiation emitting component is provided on one side of the shell, and a weld scanning locator is installed on the radiation emitting component, and a radiation receiving component is provided on the symmetrical side of the shell.

[0007] Preferably, the moving assembly includes a control part, an auxiliary moving part and a supporting and limiting part, the control part includes an electric telescopic rod, a mounting plate, a magnetic universal wheel, a control motor, a piston rod, a box, a connecting spring, a movable piston plate, a block, a cavity, a tension spring, a magnetic block rotating rod, and a push spring, an electric telescopic rod is installed on the inner wall of the shell, and the end of the electric telescopic rod is connected to the mounting plate, a magnetic universal wheel is installed at the bottom of the mounting plate, and a control motor is provided on the top of the mounting plate, and the control motor is connected to the magnetic universal wheel, and the top of the mounting plate is connected to the piston rod, and The upper end of the piston rod is located in the box body, and the box body is installed on the outer wall of the shell body. The bottom of the piston rod located at the inner end of the box body is connected to a connecting spring, and the lower end of the connecting spring is connected to a movable piston plate, and there are clamping blocks at both ends of the movable piston plate, and the clamping blocks are clamped and slid in the cavity, and the cavity is opened on both sides of the box body, and a tension spring is connected between the inner wall of each cavity and the clamping block, each of the clamping blocks is fitted and connected to a magnetic rotating rod, and the magnetic rotating rod is rotatably connected in the cavity, and a push spring is connected between the outer wall of each magnetic rotating rod close to the connecting spring and the cavity.

[0008] Preferably, the auxiliary movable part includes a first liquid channel groove, a first telescopic rod, and a ball. The shell is provided with a first liquid channel groove, and one end of the first liquid channel groove is connected to the bottom of the box body, and the other end of the first liquid channel groove is connected to a plurality of first telescopic rods, each of the first telescopic rod ends is connected to a ball in contact with the outer wall of the pipe, and the first telescopic rods are distributed at equal angles about the central axis of the shell.

[0009] Preferably, the support and limiting portion includes a connecting tube, a second liquid channel groove, a second telescopic rod, a suction cup cylinder, an opening, a notch baffle, and a spiral groove; the top of the box body is connected to a connecting tube, and the connecting tube is connected to the second liquid channel groove, the second liquid channel groove is opened in the shell, and the second liquid channel groove is offset and not connected to the first liquid channel groove, the second liquid channel groove is connected to a plurality of second telescopic rods, and the second telescopic rods are installed on one side of the first telescopic rod in the shell, and the second telescopic rods are arranged in a one-to-one correspondence with the number of first telescopic rods, each of the second telescopic rod ends is slidably connected to a suction cup cylinder, and the outer wall of each suction cup cylinder is opened with a plurality of openings, and the inner wall of each suction cup cylinder is rotatably connected with a notch baffle for cooperating with the opening, and the upper end of each notch baffle passes through the top of the suction cup cylinder and is spirally connected to the spiral groove.

[0010] Preferably, the clamping block is located at the inner end of the box body and is configured as an inclined arc surface away from the shell, the magnetic block rotating rod is configured as a magnetic block at one end away from the shell, and the piston rod is located at the inner end side of the box body and is configured as an opposite magnetic pole to the magnetic block rotating rod.

[0011] Preferably, the suction cup tube is configured as a "T"-shaped structure, and a circle of sealing rubber is provided at the bottom of the suction cup tube, a plurality of notches are provided at equal angles on the side of the notch baffle, and the notches on the side of the notch baffle correspond to the openings one by one.

[0012] Preferably, the spiral groove is opened at the end of the second telescopic rod, and the threaded connection between the spiral groove and the end of the notch baffle is set as a "bamboo dragonfly-shaped spiral" structure.

[0013] Preferably, the radiation emitting assembly includes a radiation device moving box, a radiation device moving motor, a radiation device, and a focusing device. The radiation device moving box is installed on the shell, and the radiation device moving motor and the radiation device are respectively installed on the radiation device moving box, and the radiation device is provided with a focusing device for adjusting the focal length.

[0014] Preferably, the radiation receiving assembly includes a radiation receiving device, an intermediate lifting device, a front lifting device, a rear lifting device, a radiation film box, a receiving device door, a fixed magnet, a film storage box, and a bottom lifting device. The radiation receiving device is installed on the shell in a symmetrical area with respect to the radiation emitting assembly. The intermediate lifting device, the front lifting device and the rear lifting device for lifting the radiation film box are respectively installed at the bottom of the radiation receiving device. A receiving device door is provided on the top of the radiation receiving device, and the receiving device door is a flat sliding door. Fixed magnets are installed at the four corners of the top of the radiation receiving device. Film storage boxes for storing films that have been tested are provided on both sides of the radiation receiving device. The bottoms of the radiation receiving device and the film storage box are both equipped with bottom lifting devices, so that the top of the radiation receiving device is inclined so that the tested film can slide into the film storage box.

[0015] The present invention also provides a large-diameter pipeline automatic radiation detection method, based on the above large-diameter pipeline automatic radiation detection system, comprising the following steps: S1. Install the shell: After the pipeline is welded, install the shell sleeve on the outer wall of the pipeline; S2. Prepare radiographic films: Calculate the number of radiographic films required based on the length of the pipeline 2 and the number of welds, and load radiographic films that match the number of welds in the pipeline into the radiation receiving device 501; S3. Start the scanning device: turn on the ray emission component and the weld scanning locator to scan the weld; S4. Positioning the weld: After the weld scanning locator scans the weld, the device control system controls the magnetic universal wheel to continue moving forward until the weld scanning locator is directly above the weld, and then moves a fixed distance to ensure that the emission port of the radiation device is directly above the weld; S5. Reinforce the connection: After the ray device reaches the designated position, control the moving assembly to reinforce the connection between the shell and the pipe to make it firm; S6. Prepare the receiving device: turn on the ray receiving device and open the receiving device door; S7. Adjust the film position: The middle lifting device, the front lifting device and the rear lifting device inside the radiation receiving device lift the radiation film box so that the radiation film fits closely to the surface of the pipeline weld; S8.Fix the film: turn on the fixing magnet to fix the X-ray film on the surface of the pipe and close the receiving device door; S9. Adjust the focus: adjust the focusing device according to the tube diameter and wall thickness to ensure that the X-ray detection meets the requirements; S10. Prepare film recovery: After the test is completed, adjust the bottom lifting device of the X-ray receiving device and the bottom of the film storage box to ensure that the X-ray receiving device is tilted to facilitate the X-ray film to slide into the film storage box; S11. Film recovery: Close the fixed magnet, the X-ray film falls back to the surface of the X-ray receiving device door, and slides into the film storage box. When the X-ray film completely slides into the film storage box, the film recovery operation is completed; S12. Move the inspection position: After the X-ray inspection is completed, drive the X-ray emitting component to the weld at the next welding position to continue the X-ray inspection.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the large-diameter pipeline automated X-ray detection system and method, automated and intelligent detection: the present invention utilizes the motion mechanism of the X-ray device in conjunction with the laser weld scanning and positioning technology to achieve autonomous scanning, positioning, movement and detection of the X-ray device. This design completely changes the cumbersome process of manual handling, positioning, installation and calibration in traditional detection. Through the setting of mobile components, the device can achieve smooth and precise movement on the pipeline. During the detection process, the coordinated cooperation of the second telescopic rod and the suction cup tube and other structures provides a stable support for the device housing, allowing it to fit tightly against the outer wall of the pipeline, thereby providing a solid foundation for subsequent detection operations, ensuring the stability and reliability of the detection process, greatly reducing manual intervention, and reducing detection errors caused by human factors.

[0017] Improve detection accuracy and quality: By setting up a radiation device motion box, the movement of the radiation device is finely controlled to ensure the accuracy of the detection process. At the same time, the radiation receiving device and the radiation device are connected as one and arranged symmetrically to ensure that the two are always in a straight line, effectively avoiding the common radiation machine position misalignment and film offset problems in traditional detection, and significantly improving the quality of radiation detection.

[0018] Reduce manual intervention and repetitive work: The present invention introduces the automatic loading and unloading functions of the X-ray receiving device, which reduces manual operations in the detection process and reduces errors and risks caused by manual intervention. At the same time, by adding magnetic universal wheels, flexible movement of the X-ray detection system is achieved, further reducing the workload of manual handling and calibration. In addition, the design of the telescopic fixing rod enhances the stability of the detection system and ensures the smooth progress of the detection process.

[0019] Improve detection efficiency and construction progress: By integrating the radiation device and the radiation receiving device, the present invention not only improves the detection accuracy, but also significantly shortens the detection time and reduces repetitive work. This efficient design can ensure the smooth progress of welding construction and avoid affecting the overall project progress due to delays in the detection link. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the side view of the structure of the ball of the present invention when it is close to the pipeline; Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 3 It is a schematic diagram of the side cross-sectional structure of the ball of the present invention when it is close to the pipe; Figure 4 For the present invention Figure 3 The enlarged structural diagram at B in the middle; Figure 5 It is a schematic diagram of the cross-sectional structure of the suction cup cylinder of the present invention when it is close to the pipeline; Figure 6 For the present invention Figure 5 The enlarged structural diagram at C in the middle; Figure 7 This is a schematic diagram of the cross-sectional structure of the piston rod of the present invention when it is close to the top of the box body; Figure 8 For the present invention Figure 7 The enlarged structural diagram at D in the middle; Fig. 9 This is a schematic diagram of the side view of the structure of the ball of the present invention when it is close to the pipeline; Fig.10 It is a schematic diagram of the front cross-sectional structure of the present invention; Fig.11 This is a schematic diagram of the structure of the ray receiving assembly of the present invention; Fig.12 This is a schematic diagram of the structure of the ray receiving assembly of the present invention; Fig.13 It is a schematic diagram of the structure of the ray receiving component of the present invention.

[0021] In the figure: 1, housing; 2, pipeline; 3, moving assembly; 301, electric telescopic rod; 302, mounting plate; 303, magnetic universal wheel; 304, control motor; 305, piston rod; 306, box; 307, connecting spring; 308, movable piston plate; 309, block; 310, cavity; 311, pull spring; 312, magnetic block rotating rod; 313, push spring; 314, first liquid channel groove; 315, first telescopic rod; 316, ball; 317, connecting pipe; 318, second liquid channel groove; 319, second telescopic rod; 320 , suction cup cylinder; 321, opening; 322, notch baffle; 323, spiral groove; 4, ray emitting assembly; 401, ray device movement box; 402, ray device movement motor; 403, ray device; 404, focusing device; 5, ray receiving assembly; 501, ray receiving device; 502, middle lifting device; 503, front lifting device; 504, rear lifting device; 505, ray film box; 506, receiving device door; 507, fixed magnet; 508, film storage box; 509, bottom lifting device; 6, weld scanning locator. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-13The present invention provides a technical solution: a large-caliber pipeline automated ray detection system and method, including a shell 1, a pipeline 2, a moving component 3, an electric telescopic rod 301, a mounting plate 302, a magnetic universal wheel 303, a control motor 304, a piston rod 305, a box 306, a connecting spring 307, a movable piston plate 308, a block 309, a cavity 310, a pull spring 311, a magnetic block rotating rod 312, a push spring 313, a first liquid channel groove 314, a first telescopic rod 315, a ball 316, a connecting pipe 317, a second liquid channel groove 318, a second telescopic rod 319, a suction cup cylinder 320, an opening 321, a notch baffle 322, a spiral groove 323, a ray emitting component 4, A radiation device moving box 401, a radiation device moving motor 402, a radiation device 403, a focusing device 404, a radiation receiving component 5, a radiation receiving device 501, a middle lifting device 502, a front lifting device 503, a rear lifting device 504, a radiation film box 505, a receiving device door 506, a fixed magnet 507, a film storage box 508, a bottom lifting device 509, and a weld scanning locator 6. The shell 1 is sleeved on the outer wall of the pipeline 2, and a moving component 3 for contacting the outer wall of the pipeline 2 is installed on the inner wall of the shell 1. A radiation emitting component 4 is provided on one side of the shell 1, and a weld scanning locator 6 is installed on the radiation emitting component 4, and a radiation receiving component 5 is provided on the symmetrical side of the shell 1.

[0024] The moving assembly 3 includes a control part, an auxiliary moving part and a supporting and limiting part. The control part includes an electric telescopic rod 301, a mounting plate 302, a magnetic universal wheel 303, a control motor 304, a piston rod 305, a box 306, a connecting spring 307, a movable piston plate 308, a block 309, a cavity 310, a pull spring 311, a magnetic block rotating rod 312, and a push spring 313. The electric telescopic rod 301 is installed on the inner wall of the shell 1, and the end of the electric telescopic rod 301 is connected to the mounting plate 302, the bottom of the mounting plate 302 is installed with a magnetic universal wheel 303, and the top of the mounting plate 302 is provided with a control motor 304, and the control motor 304 is connected to the magnetic universal wheel 303, the top of the mounting plate 302 is connected with a piston rod 305, and the piston rod 30 The upper end of the piston rod 305 is located in the box body 306, and the box body 306 is installed on the outer wall of the shell 1. The bottom of the piston rod 305 located at the inner end of the box body 306 is connected with a connecting spring 307, and the lower end of the connecting spring 307 is connected with a movable piston plate 308, and the two ends of the movable piston plate 308 are respectively engaged with a clamping block 309, and the clamping block 309 is engaged and slid in the cavity 310, and the cavity 310 is opened on both sides of the box body 306, and a tension spring 311 is connected between the inner wall of each cavity 310 and the clamping block 309, and each clamping block 309 is closely connected with a magnetic block rotating rod 312, and the magnetic block rotating rod 312 is rotatably connected in the cavity 310, and a push spring 313 is connected between the outer wall of one end of each magnetic block rotating rod 312 close to the connecting spring 307 and the cavity 310.

[0025] The auxiliary moving part includes a first liquid channel groove 314, a first telescopic rod 315, and a ball 316. The first liquid channel groove 314 is opened in the shell 1, and one end of the first liquid channel groove 314 is connected to the bottom of the box body 306, and the other end of the first liquid channel groove 314 is connected to a plurality of first telescopic rods 315. The end of each first telescopic rod 315 is connected to a ball 316 that contacts the outer wall of the pipe 2, and the first telescopic rods 315 are distributed at equal angles about the central axis of the shell 1.

[0026] The support and limiting portion includes a connecting pipe 317, a second liquid channel groove 318, a second telescopic rod 319, a suction cup cylinder 320, an opening 321, a notch baffle 322, and a spiral groove 323. The top of the box body 306 is connected to a connecting pipe 317, and the connecting pipe 317 is connected to the second liquid channel groove 318. The second liquid channel groove 318 is opened in the shell 1, and the second liquid channel groove 318 is misaligned and not connected to the first liquid channel groove 314. The second liquid channel groove 318 is connected to a plurality of second telescopic rods 319, and the second telescopic rods 319 are arranged It is installed on one side of the first telescopic rod 315 in the shell 1, and the second telescopic rods 319 are arranged one by one corresponding to the number of the first telescopic rods 315. The end of each second telescopic rod 319 is slidably connected with a suction cup tube 320, and the outer wall of each suction cup tube 320 is provided with a plurality of openings 321, and the inner wall of each suction cup tube 320 is rotatably connected with a notch baffle 322 for cooperating with the opening 321, and the upper end of each notch baffle 322 passes through the top of the suction cup tube 320 and is spirally connected to the spiral groove 323.

[0027] The clamping block 309 is located at the inner end of the box body 306 and is set as an inclined arc surface away from the shell 1. The end of the magnetic block rotating rod 312 away from the shell 1 is set as a magnet, and the piston rod 305 is located at the side of the inner end of the box body 306 and is set as the opposite magnetic pole to the magnetic block rotating rod 312.

[0028] The suction cup tube 320 is set as a "T"-shaped structure, and a circle of sealing rubber is provided at the bottom of the suction cup tube 320. A plurality of notches are opened at equal angles on the side of the notch baffle 322, and the notches on the side of the notch baffle 322 correspond to the openings 321 one by one.

[0029] The spiral groove 323 is formed at the end of the second telescopic rod 319 , and the threaded connection between the spiral groove 323 and the end of the notch baffle 322 is configured as a “dragonfly-like spiral” structure.

[0030] The radiation emitting assembly 4 includes a radiation device moving box 401, a radiation device moving motor 402, a radiation device 403, and a focusing device 404. The radiation device moving box 401 is installed on the shell 1, and the radiation device moving motor 402 and the radiation device 403 are respectively installed on the radiation device moving box 401, and the radiation device 403 is provided with a focusing device 404 for adjusting the focal length.

[0031] The radiation receiving assembly 5 includes a radiation receiving device 501, an intermediate lifting device 502, a front lifting device 503, a rear lifting device 504, a radiation film box 505, a receiving device door 506, a fixing magnet 507, a film storage box 508, and a bottom lifting device 509. The radiation receiving device 501 is installed in a symmetrical area with respect to the radiation emitting assembly 4 on the housing 1, and the intermediate lifting device 502, the front lifting device 503 and the rear lifting device 504 for lifting the radiation film box 505 are respectively installed at the bottom of the radiation receiving device 501. A rear lifting device 504 is provided, a receiving device door 506 is provided on the top of the ray receiving device 501, and the receiving device door 506 is a flat sliding door, fixed magnets 507 are installed at the four corners of the top of the ray receiving device 501, and film storage boxes 508 for storing the film that has been tested are provided on both sides of the ray receiving device 501, and the bottoms of the ray receiving device 501 and the film storage boxes 508 are both provided with bottom lifting devices 509, so that the top of the ray receiving device 501 is inclined so that the tested film can slide into the film storage box 508.

[0032] Based on the above detection system, the present invention also provides a large-diameter pipeline automatic radiographic detection method, comprising the following steps: S1. Install the shell: After the pipeline welding is completed, the shell 1 is installed on the outer wall of the pipeline 2; S2. Prepare radiographic films: Calculate the number of radiographic films required based on the length of the pipeline 2 and the number of welds, and load radiographic films that match the number of welds in the pipeline into the radiation receiving device 501; S3. Start the scanning device: turn on the ray emission component 4 and the weld scanning locator 6 to scan the weld; S4. Positioning the weld: After the weld scanning locator 6 scans the weld, the device control system controls the magnetic universal wheel 303 to continue moving forward until the weld scanning locator 6 is located directly above the weld, and then moves a fixed distance to ensure that the emission port of the ray device 403 is located directly above the weld; S5. Strengthening the connection: After the ray device 403 reaches the designated position, the moving assembly 3 is controlled to strengthen the connection between the housing 1 and the pipe 2 to make it firm; S6. Prepare the receiving device: turn on the ray receiving device 501 and open the receiving device door 506; S7. Adjust the film position: the intermediate lifting device 502, the front lifting device 503 and the rear lifting device 504 inside the ray receiving device 501 lift the ray film box 505 so that the ray film fits closely to the weld surface of the pipe 2; S8. Fix the film: Turn on the fixing magnet 507 to fix the X-ray film on the surface of the pipe 2, and close the receiving device door 506; S9. Adjust the focal length: adjust the focusing device 404 according to the tube diameter and wall thickness to ensure that the X-ray detection meets the requirements; S10. Prepare film recovery: After the test is completed, adjust the bottom lifting device 509 of the ray receiving device 501 and the bottom of the film storage box 508 to ensure that the ray receiving device 501 is tilted to facilitate the ray film to slide into the film storage box 508; S11 film recovery: close the fixed magnet 507, the X-ray film falls back to the surface of the X-ray receiving device door 506, and slides into the film storage box 508. When the X-ray film completely slides into the film storage box 508, the film recovery operation is completed; S12. Move the inspection position: After the X-ray inspection is completed, drive the X-ray emitting assembly 4 to the weld at the next welding position to continue the X-ray inspection.

[0033] Working principle: After the pipeline welding is completed, the upper part of the radiation detection system is installed on the pipeline 2, and the number of radiation films matching the number of pipeline welds is loaded into the radiation receiving device 501, and then the electric telescopic rod 301 is started to push the mounting plate 302 and the magnetic universal wheel 303 closer to the pipeline 2, and the movement and direction are controlled by controlling the cooperation between the motor 304 and the magnetic universal wheel 303; At the same time, the electric telescopic rod 301 pushes the mounting plate 302 to extend, and the mounting plate 302 drives the piston rod 305 to press the movable piston plate 308 to move downward in the box body 306. The two ends of the movable piston plate 308 are limited by the clamping blocks 309, and the hydraulic oil is pumped into the first liquid channel groove 314, and then flows into the first telescopic rod 315, so that the first telescopic rod 315 extends and moves, and the ball 316 at the end thereof contacts the outer wall of the pipe 2, which plays a certain supporting role and assists the magnetic universal wheel 303 to drive the movement of the housing 1; The weld scanning locator 6 of the ray detection system is turned on, and the device starts to scan the weld; after scanning the weld, the control system controls the magnetic universal wheel 303 to continue to move forward until the weld scanning locator 6 is located directly above the weld, ensuring that the emission port of the ray device 403 is located directly above the weld, and after the ray device 403 reaches the specified position; The control motor 304 controls the magnetic universal wheel 303 to stop moving, and the electric telescopic rod 301 shrinks its stroke, driving the piston rod 305 to move upward in the box body 306 through the mounting plate 302. At this time, since the block 309 limits the movable piston plate 308, the movable piston plate 308 will not move upward with the piston rod 305 under the influence of the connecting spring 307, but the connecting spring 307 is stretched. Since the movable piston plate 308 does not move, the hydraulic oil in the first liquid channel groove 314 and the first telescopic rod 315 will not be pumped into the box body 306; As the upper end of the piston rod 305 moves to the top in the box body 306, the hydraulic oil at the top of the box body 306 is pumped into the second liquid channel groove 318 and enters the second telescopic rod 319, so that the second telescopic rod 319 extends. After the suction cup cylinder 320 at the end of the second telescopic rod 319 contacts the outer wall of the pipe 2, as the second telescopic rod 319 continues to push, the spiral groove 323 at the end of the second telescopic rod 319 contacts the end of the notch baffle 322, similar to the large spiral connection of the toy "bamboo dragonfly", which drives the notch baffle 322 to rotate, and the notch on the side of the notch baffle 322 contacts the suction cup cylinder 320. The opening 321 is misaligned, and the air in the suction cup tube 320 is discharged under continued pressing, and the suction cup tube 320 is firmly fixed to the outer wall of the pipe 2 like a suction cup, so as to prevent the pipe 2 and the shell 1 from rotating during the subsequent processing, thereby improving the stability and ensuring the stability of the entire device. When the support is subsequently released and the second telescopic rod 319 is reset, the spiral groove 323 on the second telescopic rod 319 drives the notch baffle 322 to reset and rotate, and the notch on the notch baffle 322 is aligned with the opening 321, so that air can enter the suction cup tube 320, so that the suction cup tube 320 can be easily removed from the outer wall of the pipe 2; At the same time, the upper end of the piston rod 305 is parallel to the magnetic block rotating rod 312, attracting the magnetic block rotating rod 312 to rotate, and the lower end of the magnetic block rotating rod 312 is separated from the limit of the clamping block 309. The tension spring 311 in the stretched state is reset to drive the clamping block 309 to move into the cavity 310 to separate from the limit of the movable piston plate 308. Since the movable piston plate 308 is separated from the limit, the movable piston plate 308 is driven to move upward in the box body 306 under the pulling action of the connecting spring 307, so that the hydraulic oil in the first liquid channel groove 314 enters the box body 306, and the first telescopic rod 315 contracts, driving the ball 316 to separate from the contact with the pipe 2. Then, the radiation receiving device 501 is turned on, the receiving device door 506 is opened, and the middle lifting device 502, the front lifting device 503, and the rear lifting device 504 inside the device lift the radiation film box 505 so that the radiation film block in the radiation film box 505 just fits the surface of the weld of the pipeline 2; Open the fixed magnet 507 to fix the X-ray film on the surface of the pipe 2, and close the receiving device door 506 at the same time. According to the pipe diameter and wall thickness, adjust the focusing device 404 to ensure that the X-ray detection can meet the requirements. After the detection is completed, adjust the bottom lifting device 509 at the bottom of the X-ray receiving device 501 and the film storage box 508 to make the X-ray receiving device 501 tilted to facilitate the X-ray film to slide into the film storage box 508; close the fixed magnet 507, and the X-ray film falls back to the surface of the X-ray receiving device 501 and slides into the film storage box 508. Finally, after the X-ray detection is completed, drive the X-ray emitting component 4 to rotate to the weld at the next welding position, and continue the X-ray detection until the detection of all welds is completed. This is the working principle of the large-diameter pipeline automated X-ray detection system and method.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated radiographic inspection system for large-diameter pipelines, comprising a housing (1), a pipeline (2), a moving assembly (3), an electric telescopic rod (301), a mounting plate (302), a magnetic universal wheel (303), a control motor (304), a piston rod (305), a housing (306), a connecting spring (307), a movable piston plate (308), a clamping block (309), a cavity (310), a tension spring (311), a magnetic rotating rod (312), a push spring (313), a first liquid channel groove (314), a first telescopic rod (315), a ball bearing (316), a connecting pipe (317), a second liquid channel groove (318), and a second telescopic rod (319). 19), a suction cup cylinder (320), an opening (321), a notched baffle (322), a spiral groove (323), a ray emitting assembly (4), a ray device moving box (401), a ray device moving motor (402), a ray device (403), a focusing device (404), a ray receiving assembly (5), a ray receiving device (501), an intermediate lifting device (502), a front lifting device (503), a rear lifting device (504), a ray film box (505), a receiving device door (506), a fixing magnet (507), a film storage box (508), a bottom lifting device (509), and a weld scanning locator (6), characterized in that: The shell (1) is sleeved on the outer wall of the pipe (2), and a moving component (3) for contacting the outer wall of the pipe (2) is installed on the inner wall of the shell (1). A ray emitting component (4) is provided on one side of the shell (1), and a weld scanning locator (6) is installed on the ray emitting component (4), and a ray receiving component (5) is provided on the symmetrical side of the shell (1).

2. The large-diameter pipeline automated radiographic inspection system according to claim 1, characterized in that: The moving assembly (3) comprises a control unit, an auxiliary moving unit and a supporting and limiting unit. The control unit comprises an electric telescopic rod (301), a mounting plate (302), a magnetic universal wheel (303), a control motor (304), a piston rod (305), a box (306), a connecting spring (307), a movable piston plate (308), a clamping block (309), a cavity (310), a tension spring (311), a magnetic block rotating rod (312) and a push spring (313). The inner wall of the housing (1) is provided with an electric telescopic rod (301), and the end of the electric telescopic rod (301) is connected to the mounting plate (302). The bottom of the mounting plate (302) is provided with a magnetic universal wheel (303), and the top of the mounting plate (302) is provided with a control motor (304), and the control motor (304) is connected to the magnetic universal wheel (303). The top of the mounting plate (302) is connected to the piston rod (305), and the piston rod The upper end of the piston rod (305) is located in the box body (306), and the box body (306) is installed on the outer wall of the housing (1). The bottom of the piston rod (305) located in the inner end of the box body (306) is connected to a connecting spring (307), and the lower end of the connecting spring (307) is connected to a movable piston plate (308), and the two ends of the movable piston plate (308) are respectively engaged with a block (309), and the block (309) is engaged and slidable in the cavity (310), and the cavity (3 10) are opened on both sides of the box body (306), and a tension spring (311) is connected between the inner wall of each cavity (310) and the block (309), each of the blocks (309) is fittedly connected to a magnetic block rotating rod (312), and the magnetic block rotating rod (312) is rotatably connected in the cavity (310), and a push spring (313) is connected between the outer wall of one end of each magnetic block rotating rod (312) close to the connecting spring (307) and the cavity (310).

3. The large-diameter pipeline automated radiographic inspection system according to claim 2, characterized in that: The auxiliary moving part comprises a first liquid channel groove (314), a first telescopic rod (315), and a ball (316); the shell (1) is provided with a first liquid channel groove (314), one end of the first liquid channel groove (314) is connected to the bottom of the box body (306), and the other end of the first liquid channel groove (314) is connected to a plurality of first telescopic rods (315); each of the first telescopic rods (315) is connected to an end thereof with a ball (316) in contact with an outer wall of the pipe (2), and the first telescopic rods (315) are distributed at equal angles with respect to the central axis of the shell (1).

4. The large-diameter pipeline automated radiographic inspection system according to claim 2, characterized in that: The support and limiting portion comprises a connecting pipe (317), a second liquid channel groove (318), a second telescopic rod (319), a suction cup tube (320), an opening (321), a notch baffle (322), and a spiral groove (323); the top of the box body (306) is connected to a connecting pipe (317), and the connecting pipe (317) is connected to the second liquid channel groove (318); the second liquid channel groove (318) is disposed in the housing (1), and the second liquid channel groove (318) is misaligned and not connected to the first liquid channel groove (314); the second liquid channel groove (318) is connected to a plurality of second telescopic rods (319), and the second telescopic rods (319) are connected to the second liquid channel groove (318). (319) is installed on one side of the first telescopic rod (315) in the shell (1), and the second telescopic rods (319) are arranged in a one-to-one correspondence with the number of the first telescopic rods (315), and each end of the second telescopic rod (319) is slidably connected to a suction cup tube (320), and the outer wall of each suction cup tube (320) is provided with a plurality of openings (321), and the inner wall of each suction cup tube (320) is rotatably connected to a notch baffle (322) for cooperating with the opening (321), and the upper end of each notch baffle (322) passes through the top of the suction cup tube (320) and is spirally connected to the spiral groove (323).

5. The large-diameter pipeline automated radiographic inspection system according to claim 2, characterized in that: The clamping block (309) is located at the inner end of the box body (306) and is arranged as an inclined arc surface on the side away from the shell body (1), the end of the magnetic block rotating rod (312) away from the shell body (1) is arranged as a magnetic block, and the piston rod (305) is located at the side of the inner end of the box body (306) and is arranged as a magnetic pole opposite to that of the magnetic block rotating rod (312).

6. The large-diameter pipeline automated radiographic inspection system according to claim 4, characterized in that: The suction cup tube (320) is configured as a "T"-shaped structure, and a circle of sealing rubber is provided at the bottom of the suction cup tube (320). A plurality of notches are provided at equal angles on the side of the notch baffle (322), and the notches on the side of the notch baffle (322) correspond one-to-one to the openings (321).

7. The large-diameter pipeline automated radiographic inspection system according to claim 4, characterized in that: The spiral groove (323) is opened at the end of the second telescopic rod (319), and the threaded connection between the spiral groove (323) and the end of the notched baffle (322) is arranged as a "dragonfly-shaped spiral" structure.

8. The large-diameter pipeline automated radiographic inspection system according to claim 1, characterized in that: The ray emitting assembly (4) comprises a ray device moving box (401), a ray device moving motor (402), a ray device (403), and a focusing device (404); the housing (1) is provided with the ray device moving box (401), the ray device moving motor (402) and the ray device (403) are respectively installed on the ray device moving box (401), and the ray device (403) is provided with a focusing device (404) for adjusting the focal length.

9. The large-diameter pipeline automated radiographic inspection system according to claim 1, characterized in that: The radiation receiving assembly (5) comprises a radiation receiving device (501), an intermediate lifting device (502), a front lifting device (503), a rear lifting device (504), a radiation film box (505), a receiving device door (506), a fixing magnet (507), a film storage box (508), and a bottom lifting device (509). The radiation receiving device (501) is installed in a symmetrical area on the shell (1) with respect to the radiation emitting assembly (4). The intermediate lifting devices (502) for lifting the radiation film box (505) are installed at the bottom of the radiation receiving device (501). ), a front lifting device (503) and a rear lifting device (504); a receiving device door (506) is provided on the top of the ray receiving device (501), and the receiving device door (506) is a flat sliding door; fixed magnets (507) are installed at the four corners of the top of the ray receiving device (501); film storage boxes (508) for storing films that have been tested are provided on both sides of the ray receiving device (501); bottom lifting devices (509) are installed on the bottoms of the ray receiving device (501) and the film storage boxes (508), so that the top of the ray receiving device (501) is inclined.

10. An automated radiographic inspection method for large-diameter pipelines, based on the automated radiographic inspection system for large-diameter pipelines according to claim 1, characterized in that: The following steps are involved: S1. Installing the shell: After the pipeline is welded, the shell (1) is installed on the outer wall of the pipeline (2); S2. Prepare radiographic films: Calculate the number of radiographic films required according to the length of the pipeline (2) and the number of welds, and load radiographic films matching the number of welds in the pipeline into the radiation receiving device (501); S3. Start the scanning device: turn on the ray emission component (4) and the weld scanning locator (6) to scan the weld; S4. Positioning the weld: After the weld scanning locator (6) scans the weld, the device control system controls the magnetic universal wheel (303) to continue to move forward according to the feedback signal of the weld scanning locator (6) until the weld scanning locator (6) is located directly above the weld, and then moves a fixed distance to ensure that the emission port of the radiation device (403) is located directly above the weld; S5. Strengthening the connection: After the ray device (403) reaches the designated position, the moving component (3) is controlled to strengthen the connection between the housing (1) and the pipe (2) to make it firm; S6. Prepare the receiving device: turn on the ray receiving device (501), and open the receiving device door (506); S7. Adjust the film position: the intermediate lifting device (502), the front lifting device (503) and the rear lifting device (504) inside the radiation receiving device (501) lift the radiation film box (505) so that the radiation film fits closely to the weld surface of the pipeline (2); S8. Fixing the film: Turn on the fixing magnet (507) to fix the X-ray film on the surface of the pipe (2) and close the receiving device door (506); S9. Adjusting the focus: adjusting the focusing device (404) according to the tube diameter and wall thickness to ensure that the X-ray detection meets the requirements; S10. Prepare film recovery: After the detection is completed, adjust the bottom lifting device (509) of the radiation receiving device (501) and the bottom of the film storage box (508) to ensure that the radiation receiving device (501) is tilted to facilitate the radiation film to slide into the film storage box (508); S11. Film recovery: Close the fixed magnet (507), the X-ray film falls back onto the surface of the X-ray receiving device door (506), and slides into the film storage box (508). When the X-ray film completely slides into the film storage box (508), the film recovery operation is completed; S12. Move the inspection position: After the X-ray inspection is completed, drive the X-ray emitting assembly (4) to the weld at the next welding position to continue the X-ray inspection.

Images