An automated ray detection system and method for large-diameter pipelines

Abstract

The present invention discloses a large-diameter pipeline automatic ray detection system and method. The system includes a housing, the housing is sleeved on the outer wall of the pipeline, and a moving component for contacting the outer wall of the pipeline is installed on the inner wall of the housing. A ray emitting component is provided on one side of the housing, a weld scanning and positioning device is installed on the ray emitting component, and a ray receiving component is symmetrically arranged on one side of the housing. For this large-diameter pipeline automatic ray detection system and method, the automatic film loading and unloading functions of the ray receiving device are introduced, reducing manual operations during the detection process, reducing errors and risks caused by manual intervention. At the same time, by adding magnetic suction universal wheels, the flexible movement of the ray detection system is realized, further reducing the workload of manual handling and calibration. Through the integrated design of the ray device and the ray receiving device, the present invention not only improves the detection accuracy, but also significantly shortens the detection time and reduces repetitive labor.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline automated ray detection, and specifically provides a large-diameter pipeline automated ray detection system and method. Background Art

[0002] In the field of industrial pipeline construction and maintenance, the detection of large-diameter pipelines is one of the key links to ensure the quality and safe operation of pipelines. Traditional large-diameter pipeline ray detection methods usually adopt film-based ray detection technology. This technology requires manual operation of the ray machine and manual attachment of the film. The entire process requires at least two staff members to cooperate: one is responsible for attaching the film, and the other operates the ray machine. This manual operation method is not only inefficient but also has many potential safety hazards. Due to the radiation characteristics of rays, operators are constantly at risk of being irradiated during the detection process, which poses a serious threat to the health of the staff.

[0003] In addition, traditional film-based ray detection methods also have many technical limitations. For example, problems such as inaccurate attachment position of the film, incorrect placement position of the 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 reject rate of films but also result in re-shooting or even inability to complete the detection, thus seriously affecting the quality, progress, and efficiency of ray detection. Ultimately, these problems will directly affect the progress of pipeline welding construction and may even cause project delays, bringing huge economic losses to the project construction.

[0004] Therefore, in order to solve the many problems existing in traditional film-based ray detection, improve the detection efficiency and safety, reduce the reject rate and re-shooting rate, and ensure the smooth progress of pipeline welding construction, there is an urgent need to develop a device that can achieve stable and accurate ray detection process and film attachment operation. Summary of the Invention

[0005] The technical solution of the present invention aims at the technical problem of the overly single solution of the prior art and provides a solution for a large-diameter pipeline automated ray detection system and method that is significantly different from the prior art to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: An automated ray detection system for large-diameter pipelines, including a housing, the housing is sleeved on the outer wall of the pipeline, and a moving component for contacting the outer wall of the pipeline is installed on the inner wall of the housing. The moving component includes a control part, an auxiliary moving part, and a support and limit part. The control part includes an electric telescopic rod, a mounting plate, a magnetic suction universal wheel, a control motor, a piston rod, a box body, a connecting spring, a movable piston plate, a clamping block, a cavity, a pulling spring, a magnetic block rotating rod, and a pushing spring. An electric telescopic rod is installed on the inner wall of the housing, and the end of the electric telescopic rod is connected to a mounting plate. A magnetic suction universal wheel is installed at the bottom of the mounting plate, and a control motor is provided at the top of the mounting plate, and the control motor is connected to the magnetic suction universal wheel. The top of the mounting plate is connected to a piston rod, and the upper end of the piston rod is located inside the box body, and the box body is installed on the outer wall of the housing. A connecting spring is connected to the bottom of the inner end of the piston rod inside the box body, and the lower end of the connecting spring is connected to a movable piston plate, and clamping blocks are respectively engaged at both ends of the movable piston plate. The clamping blocks are engaged and slide in the cavity, and the cavity is opened on both sides of the box body, and a pulling spring is connected between the inner wall of each cavity and the clamping block. Each clamping block is fitted and connected with a magnetic block rotating rod, and the magnetic block rotating rod is rotatably connected in the cavity, and a pushing spring is connected between the outer wall of one end of each magnetic block rotating rod close to the connecting spring and the cavity. A ray emitting component is provided on one side of the housing, and a weld scanning and positioning device is installed on the ray emitting component, and a ray receiving component is symmetrically provided on one side of this side of the housing.

[0007] Preferably, the auxiliary moving part includes a first liquid channel groove, a first telescopic rod, and a ball. A first liquid channel groove is opened in the housing, and one end of the first liquid channel groove communicates with the bottom of the box body, and the other end of the first liquid channel groove communicates with a plurality of first telescopic rods. The end of each first telescopic rod is connected to a ball that contacts the outer wall of the pipeline, and the first telescopic rods are evenly distributed at equal angles around the central axis of the housing.

[0008] Preferably, the support and limit part includes a connecting pipe, 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 pipe, and the connecting pipe communicates with a second liquid channel groove. The second liquid channel groove is opened in the housing, and the second liquid channel groove is misaligned and not communicated with the first liquid channel groove. The second liquid channel groove communicates with a plurality of second telescopic rods, and the second telescopic rods are installed on one side of the first telescopic rods in the housing, and the second telescopic rods are provided in one-to-one correspondence with the number of the first telescopic rods. The end of each second telescopic rod is engaged and slidably connected with a suction cup cylinder, and a plurality of openings are opened on the outer wall of each suction cup cylinder, and a notch baffle for cooperating with the opening is rotatably connected to the inner wall of each suction cup cylinder. The upper end of each notch baffle penetrates through the top of the suction cup cylinder and is spirally connected with the spiral groove.

[0009] Preferably, the end of the clamping block inside the box body away from the housing is provided with an inclined arc surface, the end of the magnet block rotating rod away from the housing is provided with a magnet block, and the end of the piston rod on the side of the inner end of the box body is provided with a magnetic pole opposite to that of the magnet block rotating rod.

[0010] Preferably, the sucker cylinder is of a "T" - shaped structure, and a circle of sealing rubber is provided at the bottom of the sucker cylinder. A number of notches are equiangularly opened on the side of the notch baffle, and the upper notches on the side of the notch baffle correspond to the openings one by one.

[0011] 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 of a "dragonfly - like spiral" structure.

[0012] Preferably, the ray - emitting assembly includes a ray device moving box, a ray device moving motor, a ray device, and a focusing device. The ray device moving box is installed on the housing, and the ray device moving motor and the ray device are respectively installed on the ray device moving box, and a focusing device for adjusting the focal length is provided on the ray device.

[0013] Preferably, the ray - receiving assembly includes a ray - receiving device, an intermediate lifting device, a front lifting device, a rear lifting device, a ray film cassette, a receiving device door, a fixed magnet, a film storage box, and a bottom lifting device. The ray - receiving device is installed in the area symmetric to the ray - emitting assembly on the housing. The intermediate lifting device, the front lifting device, and the rear lifting device for lifting the ray film cassette are respectively installed at the inner bottom of the ray - receiving device. A receiving device door is provided at the top of the ray - receiving device, and the receiving device door is a flat - push door. Fixed magnets are installed at the four corners of the top of the ray - receiving device. Film storage boxes for storing the detected films are provided on both sides of the ray - receiving device. Bottom lifting devices are installed at the bottoms of the ray - receiving device and the film storage box, making the top of the ray - receiving device inclined so that the detected films can slide into the film storage box.

[0014] The present invention also provides a method for automatic ray detection of large - diameter pipelines. Based on the above - mentioned automatic ray - detection system for large - diameter pipelines, it includes the following steps:

[0015] S1. Install the housing: After the pipeline is welded, the housing is sleeved and installed on the outer wall of the pipeline.

[0016] S2. Prepare the ray film: According to the length of the pipeline (2) and the number of welds, calculate the required number of ray films, and load the ray films matching the number of pipeline welds into the ray - receiving device (501).

[0017] S3. Start the scanning device: Turn on the ray - emitting assembly and the weld - scanning locator to scan the welds.

[0018] S4. Welding seam positioning: After the welding seam scanner scans the welding seam, the device control system controls the magnetic universal wheels to continue moving forward until the welding seam scanner is directly above the welding seam, and then moves a fixed distance to ensure that the emission port of the ray device is directly above the welding seam;

[0019] S5. Reinforced connection: After the ray device reaches the specified position, control the moving component to reinforce the connection between the housing and the pipeline to make it firm;

[0020] S6. Prepare the receiving device: Turn on the ray receiving device and open the receiving device door;

[0021] S7. Adjust the film position: The intermediate lifting device, front lifting device, and rear lifting device inside the ray receiving device lift the ray film cassette so that the ray film closely adheres to the surface of the pipeline welding seam;

[0022] S8. Fix the film: Turn on the fixing magnet to fix the ray film on the pipeline surface, and at the same time close the receiving device door;

[0023] S9. Adjust the focal length: According to the pipe diameter and wall thickness, adjust the focusing device to ensure that the ray detection meets the requirements;

[0024] S10. Prepare for film recovery: After the detection is completed, adjust the bottom lifting device at the bottom of the ray receiving device and the film storage box to ensure that the ray receiving device is tilted, facilitating the ray film to slide into the film storage box;

[0025] S11. Recover the film: Turn off the fixing magnet, the ray film falls back to the surface of the ray receiving device door and slides into the film storage box. When the ray film completely slides into the film storage box, the film recovery operation is completed;

[0026] S12. Move the detection position: After the ray detection is completed, drive the ray emission component to the welding seam at the next welding position and continue the ray detection.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: For this large-diameter pipeline automated ray detection system and method, automated and intelligent detection: The present invention utilizes the ray device motion mechanism in cooperation with the laser welding seam scanning and positioning technology to achieve the autonomous scanning, positioning, movement, and detection of the ray device. This design completely changes the cumbersome processes of manual handling, positioning, installation, and calibration in traditional detection. Through the setting of the moving component, the device can achieve stable and precise movement on the pipeline. During the detection process, the coordinated cooperation of structures such as the second telescopic rod and the suction cup cylinder provides a stable support for the device housing, enabling it to closely adhere to 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.

[0028] Improve detection accuracy and quality: By setting up a ray device movement box, fine control of the movement of the ray device is achieved, ensuring the accuracy of the detection process. At the same time, the ray receiving device and the ray device are integrated and symmetrically arranged, ensuring that the two are always in a straight line, effectively avoiding the common problems of incorrect ray camera positions and film offsets in traditional detections, and significantly improving the quality of ray detection.

[0029] Reduce manual intervention and repetitive labor: The present invention introduces the automatic film loading and unloading functions of the ray receiving device, reducing manual operations during the detection process, reducing errors and risks caused by manual intervention. At the same time, by adding magnetic suction universal wheels, flexible movement of the ray detection system is achieved, further reducing the workload of manual handling and calibration. In addition, the design of the telescopic fixed rod enhances the stability of the detection system, ensuring the smooth progress of the detection process.

[0030] Improve detection efficiency and construction progress: Through the integrated design of the ray device and the ray receiving device, the present invention not only improves the detection accuracy but also significantly shortens the detection time and reduces repetitive labor. 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

[0031] Figure 1 It is a schematic side view structure diagram of the state where the ball of the present invention is close to the pipeline;

[0032] Figure 2 For the present invention Figure 1 The enlarged structure diagram at A in;

[0033] Figure 3 It is a schematic side view sectional structure diagram of the state where the ball of the present invention is close to the pipeline;

[0034] Figure 4 For the present invention Figure 3 The enlarged structure diagram at B in;

[0035] Figure 5 It is a schematic side view sectional structure diagram of the state where the suction cup cylinder of the present invention is close to the pipeline;

[0036] Figure 6 For the present invention Figure 5 The enlarged structure diagram at C in;

[0037] Figure 7 It is a schematic sectional structure diagram of the state where the piston rod of the present invention is close to the top of the box;

[0038] Figure 8 For the present invention Figure 7 The enlarged structure diagram at D in;

[0039] Figure 9 Schematic side view of the state of the ball of the present invention close to the pipeline;

[0040] Figure 10 Schematic front sectional view of the present invention;

[0041] Figure 11 Schematic diagram of the ray receiving component of the present invention;

[0042] Figure 12 Schematic diagram of the ray receiving component of the present invention;

[0043] Figure 13 Schematic diagram of the ray receiving component of the present invention.

[0044] In the figure: 1. Housing; 2. Pipeline; 3. Moving component; 301. Electric telescopic rod; 302. Mounting plate; 303. Magnetic suction universal wheel; 304. Control motor; 305. Piston rod; 306. Box body; 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 component; 401. Ray device moving box; 402. Ray device moving motor; 403. Ray device; 404. Focusing device; 5. Ray receiving component; 501. Ray receiving device; 502. Intermediate lifting device; 503. Front lifting device; 504. Rear lifting device; 505. Ray film cassette; 506. Receiving device door; 507. Fixed magnet; 508. Film storage box; 509. Bottom lifting device; 6. Weld seam scanning locator. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0046] Please refer to Figures 1-13, the present invention provides a technical solution: a large-diameter pipeline automatic ray detection system and method, including a housing 1, a pipeline 2, a moving component 3, an electric telescopic rod 301, a mounting plate 302, a magnetic suction universal wheel 303, a control motor 304, a piston rod 305, a box body 306, a connecting spring 307, a movable piston plate 308, a clamping block 309, a cavity 310, a pulling spring 311, a magnetic block rotating rod 312, a pushing 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 ray device moving box 401, a ray device moving motor 402, a ray device 403, a focusing device 404, a ray receiving component 5, a ray receiving device 501, an intermediate lifting device 502, a front lifting device 503, a rear lifting device 504, a ray film cassette 505, a receiving device door 506, a fixed magnet 507, a film storage box 508, a bottom lifting device 509, a weld scanning locator 6. The housing 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 housing 1. The moving component 3 includes a control part, an auxiliary moving part and a support and limit part. The control part includes an electric telescopic rod 301, a mounting plate 302, a magnetic suction universal wheel 303, a control motor 304, a piston rod 305, a box body 306, a connecting spring 307, a movable piston plate 308, a clamping block 309, a cavity 310, a pulling spring 311, a magnetic block rotating rod 312, a pushing spring 313. The electric telescopic rod 301 is installed on the inner wall of the housing 1, and the end of the electric telescopic rod 301 is connected with a mounting plate 302. The magnetic suction universal wheel 303 is installed at the bottom of the mounting plate 302, and a control motor 304 is arranged on the top of the mounting plate 302, and the control motor 304 is connected to the magnetic suction universal wheel 303. The piston rod 305 is connected to the top of the mounting plate 302, and 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. A connecting spring 307 is connected to the bottom of the inner end of the piston rod 305 in the box body 306, and the lower end of the connecting spring 307 is connected with a movable piston plate 308, and clamping blocks 309 are respectively clamped at both ends of the movable piston plate 308. The clamping blocks 309 are clamped and slide in the cavity 310, and the cavity 310 is opened on both sides of the box body 306, and a pulling spring 311 is connected between the inner wall of each cavity 310 and the clamping block 309. Each clamping block 309 is attached and connected with a magnetic block rotating rod 312, and the magnetic block rotating rod 312 is rotatably connected in the cavity 310, and a pushing 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. A ray emitting component 4 is arranged on one side of the housing 1, and a weld scanning locator 6 is installed on the ray emitting component 4, and a ray receiving component 5 is symmetrically arranged on one side of the housing 1 on this side.

[0047] The auxiliary moving part includes a first liquid channel groove 314, a first telescopic rod 315, and a ball 316. A first liquid channel groove 314 is formed in the housing 1, and one end of the first liquid channel groove 314 communicates with the bottom of the box body 306, and the other end of the first liquid channel groove 314 communicates with a plurality of first telescopic rods 315. A ball 316 in contact with the outer wall of the pipeline 2 is connected to the end of each first telescopic rod 315, and the first telescopic rods 315 are evenly distributed at equal angles around the central axis of the housing 1.

[0048] The support and limit part 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. A connecting pipe 317 is connected to the top of the box body 306, and the connecting pipe 317 communicates with a second liquid channel groove 318. The second liquid channel groove 318 is formed in the housing 1, and the second liquid channel groove 318 is misaligned and not communicated with the first liquid channel groove 314. The second liquid channel groove 318 communicates with a plurality of second telescopic rods 319, and the second telescopic rods 319 are installed on one side of the first telescopic rods 315 in the housing 1, and the second telescopic rods 319 are arranged in one-to-one correspondence with the number of the first telescopic rods 315. A suction cup cylinder 320 is snap-fitted and slidably connected to the end of each second telescopic rod 319, and a plurality of openings 321 are formed in the outer wall of each suction cup cylinder 320, and a notch baffle 322 for cooperating with the opening 321 is rotatably connected to the inner wall of each suction cup cylinder 320. The upper end of each notch baffle 322 penetrates through the top of the suction cup cylinder 320 and is spirally connected to the spiral groove 323.

[0049] The clamping block 309 is arranged with an inclined arc surface on the side of the inner end of the box body 306 away from the housing 1. One end of the magnetic block rotating rod 312 away from the housing 1 is provided with a magnetic block, and the piston rod 305 is arranged with a magnetic pole opposite to that of the magnetic block rotating rod 312 on the side of the inner end of the box body 306.

[0050] The suction cup cylinder 320 is arranged in a "T" shape, and a circle of sealing rubber is provided at the bottom of the suction cup cylinder 320. A plurality of notches are evenly formed on the side of the notch baffle 322, and the upper notches on the side of the notch baffle 322 correspond to the openings 321 one by one.

[0051] 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 arranged in a "dragonfly-shaped spiral" structure.

[0052] The ray emission component 4 includes a ray device moving box 401, a ray device moving motor 402, a ray device 403, and a focusing device 404. A ray device moving box 401 is installed on the housing 1, and a ray device moving motor 402 and a ray device 403 are respectively installed on the ray device moving box 401, and a focusing device 404 for adjusting the focal length is provided on the ray device 403.

[0053] The ray receiving assembly 5 includes a ray receiving device 501, an intermediate lifting device 502, a front lifting device 503, a rear lifting device 504, a ray film cassette 505, a receiving device door 506, a fixing magnet 507, a film storage cassette 508, and a bottom lifting device 509. The ray receiving device 501 is installed in a symmetric region of the housing 1 with respect to the ray emitting assembly 4. The intermediate lifting device 502, the front lifting device 503, and the rear lifting device 504 for lifting the ray film cassette 505 are respectively installed at the inner bottom of the ray receiving device 501. A receiving device door 506 is provided at the top of the ray receiving device 501, and the receiving device door 506 is a flat push door. Fixing magnets 507 are installed at the four corners of the top of the ray receiving device 501. Film storage cassettes 508 for storing the films that have been detected are provided on both sides of the ray receiving device 501. Bottom lifting devices 509 are installed at the bottoms of the ray receiving device 501 and the film storage cassette 508, so that the top of the ray receiving device 501 is inclined, so that the detected films can slide into the film storage cassette 508.

[0054] Based on the above detection system, the present invention also provides an automated ray detection method for large-diameter pipelines, including the following steps:

[0055] S1. Install the housing: After the pipeline is welded, the housing 1 is sleeved and installed on the outer wall of the pipeline 2;

[0056] S2. Prepare the ray film: According to the length of the pipeline (2) and the number of welds, calculate the required number of ray films, and load the ray films matching the number of pipeline welds into the ray receiving device (501);

[0057] S3. Start the scanning device: Turn on the ray emitting assembly 4 and the weld scanning locator 6 to scan the welds;

[0058] S4. Locate the weld: After the weld scanning locator 6 scans the weld, the device control system controls the magnetic suction universal wheel 303 to continue moving forward until the weld scanning locator 6 is directly above the weld, and then move a fixed distance to ensure that the emission port of the ray device 403 is directly above the weld;

[0059] S5. Strengthen the connection: After the ray device 403 reaches the specified position, control the moving assembly 3 to strengthen the connection between the housing 1 and the pipeline 2 to make it firm;

[0060] S6. Prepare the receiving device: Turn on the ray receiving device 501 and open the receiving device door 506;

[0061] 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 cassette 505 to make the ray film closely fit the surface of the pipeline 2 weld;

[0062] S8. Fix the film: Turn on the fixing magnet 507 to fix the radiographic film on the surface of the pipeline 2, and at the same time close the receiving device door 506;

[0063] S9. Adjust the focal length: Adjust the focusing device 404 according to the pipe diameter and wall thickness to ensure that the radiographic inspection meets the requirements;

[0064] S10. Prepare for film recovery: After the inspection is completed, adjust the bottom lifting device 509 at the bottom of the radiation receiving device 501 and the film storage box 508 to ensure that the radiation receiving device 501 is inclined, facilitating the radiographic film to slide into the film storage box 508;

[0065] S11. Recover the film: Turn off the fixing magnet 507, the radiographic film falls back to the surface of the radiation receiving device door 506 and slides into the film storage box 508. When the radiographic film completely slides into the film storage box, the film recovery operation is completed;

[0066] S12. Move the inspection position: After the radiographic inspection is completed, drive the radiation emission assembly 4 to the weld at the next welding position and continue the radiographic inspection.

[0067] Working principle: After the pipeline welding is completed, install the upper part of the radiographic inspection system on the pipeline 2, and load the number of radiographic films in the radiation receiving device 501 that matches the number of pipeline welds. Then start the electric telescopic rod 301, push the mounting plate 302 and the magnetic suction universal wheel 303 closer to the pipeline 2, and control the movement and direction by coordinating the control of the motor 304 and the magnetic suction universal wheel 303;

[0068] At the same time, the electric telescopic rod 301 pushes the extension stroke of the mounting plate 302. 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 fixture blocks 309, injecting hydraulic oil into the first liquid channel groove 314 and then flowing into the first telescopic rod 315, causing the first telescopic rod 315 to extend and move. The ball 316 at its end contacts the outer wall of the pipeline 2, playing a certain supporting role while assisting the magnetic suction universal wheel 303 to drive the movement of the housing 1;

[0069] Turn on the weld scanning and positioning device 6 of the radiographic inspection system, and the device starts to scan the weld; after scanning the weld, the control system controls the magnetic suction universal wheel 303 to continue moving forward until the weld scanning and positioning device 6 is directly above the weld, ensuring that the emission port of the radiation device 403 is directly above the weld. After the radiation device 403 reaches the specified position;

[0070] The control motor 304 controls the magnetic suction universal wheel 303 to stop moving, and the electric telescopic rod 301 contracts its stroke. The piston rod 305 is driven by the mounting plate 302 to move upward and inward of the box body 306. At this time, since the clamping 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 under force. 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;

[0071] As the upper end of the piston rod 305 moves to the top inside the box body 306, the hydraulic oil at the top inside the box body 306 is pumped into the second liquid channel groove 318 and then into the second telescopic rod 319, causing the second telescopic rod 319 to extend. After the suction cup cylinder 320 at the end of the second telescopic rod 319 contacts the outer wall of the pipeline 2, with the continuous push of the second telescopic rod 319, the spiral groove 323 at the end of the second telescopic rod 319 contacts the end of the notch baffle 322. Similar to the connection of a large spiral of a toy "bamboo dragonfly", it drives the notch baffle 322 to rotate. The notch on the side of the notch baffle 322 is misaligned with the opening 321 on the suction cup cylinder 320. Under continuous pressing, the air in the suction cup cylinder 320 is discharged, and it is firmly fixed on the outer wall of the pipeline 2 like a suction cup, preventing the pipeline 2 from rotating between the housing 1 during subsequent processing, improving stability, and ensuring the stability of the entire device. When the support is removed later, when the second telescopic rod 319 is reset, the spiral groove 323 on the second telescopic rod 319 drives the notch baffle 322 to rotate back to its original position, and the notch on the notch baffle 322 is aligned with the opening 321, allowing air to enter the suction cup cylinder 320, so that the suction cup cylinder 320 can be easily removed from the outer wall of the pipeline 2;

[0072] At the same time, the upper end of the piston rod 305 is parallel to the magnet rotating rod 312, attracting the magnet rotating rod 312 to rotate. The lower end of the magnet rotating rod 312 disengages from the limit of the clamping block 309. The tension spring 311 in the stretched state resets and drives the clamping block 309 to move into the cavity 310 and disengage from the limit of the movable piston plate 308. Since the movable piston plate 308 is released from the limit, it is driven by the pulling force of the connecting spring 307 to move upward inside the box body 306, causing the hydraulic oil in the first liquid channel groove 314 to enter the box body 306, and the first telescopic rod 315 contracts, driving the ball 316 to disengage from the contact with the pipeline 2,

[0073] Subsequently, the ray receiving device 501 is turned on, the receiving device door 506 is opened, and the intermediate lifting device 502, the front lifting device 503, and the rear lifting device 504 inside the device lift the ray film cassette 505, so that the ray film block in the ray film cassette 505 just fits onto the surface of the weld of the pipeline 2;

[0074] Turn on the fixed magnet 507 to fix the radiographic film on the surface of the pipeline 2. At the same time, close the receiving device door 506. According to the pipe diameter and wall thickness, adjust the focusing device 404 to ensure that the radiographic inspection can meet the requirements. After the inspection is completed, adjust the bottom lifting device 509 at the bottom of the radiation receiving device 501 and the film cassette 508 to make the radiation receiving device 501 inclined, facilitating the radiographic film to slide into the film cassette 508; turn off the fixed magnet 507, the radiographic film falls back to the surface of the radiation receiving device 501 and slides into the film cassette 508. Finally, after the radiographic inspection is completed, drive the radiation emitting assembly 4 to rotate to the weld at the next welding position and continue the radiographic inspection until the inspection of all welds is completed. This is the working principle of the large-diameter pipeline automatic radiographic inspection system and method.

[0075] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automated ray detection system for large-diameter pipelines, comprising a housing (1), a pipeline (2), a moving component (3), an electric telescopic rod (301), a mounting plate (302), a magnetic suction universal wheel (303), a control motor (304), a piston rod (305), a box body (306), a connecting spring (307), a movable piston plate (308), a clamping block (309), a cavity (310), a pulling spring (311), a magnetic block rotating rod (312), a pushing 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 ray device moving box (401), a ray device moving motor (402), a ray device (403), a focusing device (404), a ray receiving component (5), a ray receiving device (501), an intermediate lifting device (502), a front lifting device (503), a rear lifting device (504), a ray film cassette (505), a receiving device door (506), a fixed magnet (507), a film storage cassette (508), a bottom lifting device (509), a weld scanning and positioning device (6), characterized in that: The housing (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 housing (1). The moving component (3) includes a control part, an auxiliary moving part, and a support and limit part. The control part includes an electric telescopic rod (301), a mounting plate (302), a magnetic suction universal wheel (303), a control motor (304), a piston rod (305), a box body (306), a connecting spring (307), a movable piston plate (308), a clamping block (309), a cavity (310), a pulling spring (311), a magnetic block rotating rod (312), and a pushing spring (313). An electric telescopic rod (301) is installed on the inner wall of the housing (1), and the end of the electric telescopic rod (301) is connected to a mounting plate (302). A magnetic suction universal wheel (303) is installed at the bottom of the mounting plate (302), and a control motor (304) is provided at the top of the mounting plate (302), and the control motor (304) is connected to the magnetic suction universal wheel (303). The top of the mounting plate (302) is connected to a piston rod (305), and the upper end of the piston rod (305) is located inside the box body (306), and the box body (306) is installed on the outer wall of the housing (1). A connecting spring (307) is connected to the bottom of the inner end of the piston rod (305) inside the box body (306), and the lower end of the connecting spring (307) is connected to a movable piston plate (308), and clamping blocks (309) are respectively clamped at both ends of the movable piston plate (308). The clamping blocks (309) are clamped and slide inside the cavity (310), and the cavity (310) is opened on both sides of the box body (306), and a pulling spring (311) is connected between the inner wall of each cavity (310) and the clamping block (309). Each clamping block (309) is attached to a magnetic block rotating rod (312), and the magnetic block rotating rod (312) is rotatably connected inside the cavity (310), and a pushing 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). A ray emitting component (4) is provided on one side of the housing (1), and a weld seam scanning and positioning device (6) is installed on the ray emitting component (4), and a ray receiving component (5) matching the ray emitting component (4) is installed on the other side of the housing (1).

2. The automated ray detection system for large-diameter pipelines according to claim 1, characterized in that: The auxiliary moving part includes a first liquid channel groove (314), a first telescopic rod (315), and a ball (316). A first liquid channel groove (314) is opened inside the housing (1), and one end of the first liquid channel groove (314) communicates with the bottom of the box body (306), and the other end of the first liquid channel groove (314) communicates with a plurality of first telescopic rods (315). A ball (316) contacting the outer wall of the pipeline (2) is connected to the end of each first telescopic rod (315), and the first telescopic rods (315) are distributed at equal angles about the central axis of the housing (1).

3. The automated ray detection system for large-diameter pipelines according to claim 1, wherein: The support and limit part 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). A connecting pipe (317) is connected to the top of the box body (306), and the connecting pipe (317) communicates with a second liquid channel groove (318). The second liquid channel groove (318) is opened in the housing (1), and the second liquid channel groove (318) is misaligned and not communicated with the first liquid channel groove (314). The second liquid channel groove (318) communicates with a number of second telescopic rods (319), and the second telescopic rods (319) are installed on one side of the first telescopic rods (315) in the housing (1), and the second telescopic rods (319) are arranged in one-to-one correspondence with the number of the first telescopic rods (315). The end of each second telescopic rod (319) is snap-fitted and slidably connected with a suction cup cylinder (320), and a number of openings (321) are opened on the outer wall of each suction cup cylinder (320), and a notch baffle (322) for cooperating with the opening (321) is rotatably connected to the inner wall of each suction cup cylinder (320). The upper end of each notch baffle (322) penetrates through the top of the suction cup cylinder (320) and is helically connected with the spiral groove (323).

4. The automatic ray detection system for large-diameter pipelines according to claim 1, wherein: The end of the clamping block (309) located inside the box body (306) and away from the housing (1) is set as an inclined arc surface. The end of the magnetic block rotating rod (312) away from the housing (1) is set as a magnetic block, and the end of the piston rod (305) located inside the box body (306) and at the side is set as the opposite magnetic pole to the magnetic block rotating rod (312).

5. The automated ray detection system for large-diameter pipelines according to claim 3, characterized in that: The suction cup cylinder (320) is set as a "T" type structure, and a circle of sealing rubber is provided at the bottom of the suction cup cylinder (320). A number of notches are opened at equal angles on the side of the notch baffle (322), and the upper notches on the side of the notch baffle (322) correspond to the openings (321) one by one.

6. The automated ray detection system for large-diameter pipelines according to claim 3, wherein: 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 notch baffle (322) is set as a "dragonfly-like spiral" structure.

7. An automated ray detection system for large-diameter pipelines according to claim 1, characterized in that: The ray emission component (4) includes a ray device moving box (401), a ray device moving motor (402), a ray device (403), and a focusing device (404). A ray device moving box (401) is installed on the housing (1), and a ray device moving motor (402) and a ray device (403) are respectively installed on the ray device moving box (401), and a focusing device (404) for focal length adjustment is provided on the ray device (403).

8. An automatic ray detection system for large-diameter pipelines according to claim 1, characterized in that: The ray receiving component (5) includes a ray receiving device (501), an intermediate lifting device (502), a front lifting device (503), a rear lifting device (504), a ray film cassette (505), a receiving device door (506), a fixing magnet (507), a film storage cassette (508), and a bottom lifting device (509). The ray receiving device (501) is installed in the symmetric area of the housing (1) with respect to the ray emitting component (4). The intermediate lifting device (502), the front lifting device (503), and the rear lifting device (504) for lifting the ray film cassette (505) are respectively installed at the inner bottom of the ray receiving device (501). The receiving device door (506) is provided at the top of the ray receiving device (501), and the receiving device door (506) is a flat push door. Fixing magnets (507) are installed at the four corners of the top of the ray receiving device (501). Film storage cassettes (508) for storing the detected films are provided on both sides of the ray receiving device (501). Bottom lifting devices (509) are installed at the bottoms of the ray receiving device (501) and the film storage cassette (508) to make the top of the ray receiving device (501) inclined.

9. An automated ray detection method for large-diameter pipelines, based on the automated ray detection system for large-diameter pipelines described in claim 1, characterized in that, It includes the following steps: S1. Install the housing: After the pipeline welding is completed, the housing (1) is sleeved and installed on the outer wall of the pipeline (2); S2. Prepare the ray film: According to the length of the pipeline (2) and the number of welds, calculate the required number of ray films, and load the ray films matching the number of pipeline welds into the ray receiving device (501); S3. Start the scanning device: Turn on the ray emitting component (4) and the weld scanning and positioning device (6) to scan the welds; S4. Locate the weld: After the weld scanning and positioning device (6) scans the weld, according to the feedback signal of the weld scanning and positioning device (6), the device control system controls the magnetic suction universal wheel (303) to continue moving forward until the weld scanning and positioning device (6) is directly above the weld, and then move a fixed distance to ensure that the emission port of the ray device (403) is directly above the weld; S5. Strengthen the connection: After the ray device (403) reaches the specified position, control the moving component (3) to strengthen the connection between the housing (1) and the pipeline (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 cassette (505) to make the ray film closely fit the surface of the pipeline (2) weld; S8. Fix the film: Turn on the fixing magnet (507) to fix the ray film on the surface of the pipeline (2), and at the same time close the receiving device door (506); S9. Adjust the focal length: According to the pipe diameter and wall thickness, adjust the focusing device (404) to ensure that the ray detection meets the requirements; S10. Prepare for film recycling: After the detection is completed, adjust the bottom lifting device (509) at the bottom of the ray receiving device (501) and the film cassette (508) to ensure that the ray receiving device (501) is inclined, facilitating the ray film to slide into the film cassette (508); S11. Recycle the film: Turn off the fixed magnet (507), the ray film falls back to the surface of the ray receiving device door (506) and slides into the film cassette (508). When the ray film completely slides into the film cassette (508), the film recycling operation is completed; S12. Move the detection position: After the ray detection is completed, drive the ray emission component (4) to the weld at the next welding position and continue the ray detection.

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