Natural gas pipeline fusion welding seam crack nondestructive testing device

Abstract

The invention discloses a natural gas pipeline fusion welding seam crack nondestructive testing device, and relates to the technical field of welding seam crack detection. The device comprises a supporting frame, the interior of the supporting frame is semicircular, and an arc-shaped frame is fixedly connected to the interior of the supporting frame. According to the device, the stabilizing assembly and the detection assembly are arranged, the stabilizing assembly is shifted firstly, so that the supporting frame can be stabilized on the natural gas pipeline, the situation that the device deviates from the weld joint due to looseness in the detection process is reduced, then the detection assembly in the arc-shaped frame is started to operate, and an ultrasonic probe is driven to circularly detect the weld joint; through the operation, full-automatic detection of the weld joint of the natural gas pipeline is realized, a worker does not need to hold an ultrasonic instrument by hand to manually rotate along the weld joint of the pipeline, the detection efficiency is greatly improved, and the subjectivity and accuracy of a detection result are effectively improved; and the detection process is more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of weld crack detection, and in particular to a non-destructive detection device for weld cracks in fusion welding of a natural gas pipeline. Background Art

[0002] Natural gas pipelines are crucial channels for energy transportation, and the quality of their welding is directly related to their safety and service life. Weld seams are high-risk areas for pipeline failure due to stress concentration and the presence of welding defects. Therefore, nondestructive testing of natural gas pipeline welds is a critical step in ensuring safe pipeline operation. It can detect internal defects without damaging the pipeline, preventing potential leaks and ruptures, and protecting public safety and the environment.

[0003] Existing non-destructive testing methods for natural gas pipeline welds mainly include radiographic testing, ultrasonic testing, magnetic particle testing and penetrant testing. These methods each have their own characteristics. Radiographic testing can detect defects inside the pipeline; ultrasonic testing, with its high resolution and non-radiation characteristics, is widely used to detect cracks and discontinuities in the pipeline; magnetic particle testing is suitable for detecting surface and near-surface defects; and penetrant testing is suitable for detecting open defects. These technologies provide effective means for quality control of pipeline welds.

[0004] Among the various detection methods mentioned above, ultrasonic detection is widely used in natural gas pipeline weld detection due to its radiation-free and high-resolution. However, when performing detection, traditional ultrasonic detection devices usually require staff to hold the ultrasonic instrument and perform manual rotation detection along the pipeline weld, and then observe the ultrasonic fluctuations in real time to determine whether there are defects in the weld. However, this method often relies on the experience and skills of the detection personnel and cannot free the staff's hands to achieve automatic operation, which affects the subjectivity and accuracy of the detection results. For this reason, the present application provides a non-destructive detection device for cracks in fusion welding welds of natural gas pipelines. Summary of the Invention

[0005] The purpose of this application is to solve the problem that traditional ultrasonic testing often relies on the experience and skills of the test personnel and cannot free the workers' hands to achieve automatic operation, thereby affecting the subjectivity and accuracy of the test results. This application provides a non-destructive detection device for cracks in fusion welding of natural gas pipelines.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: A nondestructive detection device for cracks in fusion welding seams of natural gas pipelines comprises a support frame, the interior of the support frame is semicircular, an arc frame is fixedly connected to the interior of the support frame, a battery is fixedly connected to the top of the support frame, fixed blocks are fixedly connected to both sides of the support frame, an adjustment block is slidably connected to the interior of the arc frame, an ultrasonic probe is fixedly connected to the bottom of the adjustment block, the ultrasonic probe is electrically connected to the battery, the ultrasonic probe is electrically connected to an external controller, a stabilizing component is installed inside the fixed block, a detection component is installed inside the arc frame, and a protection component is installed at the bottom of the adjustment block.

[0007] By adopting the above technical solution, the support frame is erected above the pipeline, and then the natural gas pipeline inside the support frame is clamped and fixed by toggling the stabilizing component inside the fixing block, so that the support frame can be firmly fixed on the natural gas pipeline, reducing the situation where the device loosens during the detection process and deviates from the weld. Then, the detection component inside the arc frame is started to operate, so that the adjustment block drives the ultrasonic probe to move back and forth inside the arc frame, so that the weld is cyclically detected by the moving ultrasonic probe, and then the fluctuation of the ultrasonic wave is observed in real time to determine whether there are defects in the weld. Finally, when the detection is completed, the clamping of the pipeline can be released, and then the support frame can be rotated so that the support frame moves to the other half of the pipeline that has not been inspected, and then the device is fixed again, and the above operation is repeated to achieve all-round and no-dead-angle detection of the weld. Through the above operation, fully automatic detection of the welds of the natural gas pipeline is realized, and there is no need for the staff to manually rotate the ultrasonic instrument along the pipeline weld, which greatly improves the detection efficiency.

[0008] Furthermore, the stabilizing component includes a sliding block slidably connected inside the two fixed blocks, a connecting plate is fixedly connected to one side of the sliding block, an arc-shaped clamping plate is fixedly connected to the end of the connecting plate away from the sliding block, the connecting plate is slidably connected to both sides of the support frame, and a limiting member is symmetrically arranged on one side of the sliding block.

[0009] By adopting the above technical solution, the movement of the sliding block will drive the two connecting plates to approach each other inside the support frame. At this time, the two arc-shaped clamping plates will be brought close to each other inside the support frame through the two connecting plates, so that the arc-shaped clamping plates can always maintain clamping on the natural gas pipeline during the inspection process, so that the support frame can be firmly attached to the natural gas pipeline, reducing the situation where the device becomes loose during the inspection process and deviates from the weld.

[0010] Furthermore, a rubber pad is fixedly connected to the inner wall of the arc-shaped clamping plate, a sliding groove is provided on the top of the two fixed blocks, a shifting block is fixedly connected to the top of the sliding block, and the shifting block is slidably connected in the sliding groove.

[0011] By adopting the above technical solution, the shifting block is pushed to slide inside the sliding groove, thereby driving the sliding block and the limiting member to slide together inside the fixed block through the shifting block.

[0012] Furthermore, the limiting member includes two connecting blocks symmetrically fixedly connected to one side of the sliding block, a groove is provided inside the two connecting blocks, a spring 1 is fixedly connected inside the groove, a clamping block is slidably connected inside the groove, one end of the spring 1 away from the inner wall of the connecting block is fixedly connected to one end of the clamping block, and multiple clamping grooves are evenly provided on both sides of the interior of the two fixed blocks.

[0013] By adopting the above technical solution, since multiple slots are opened on both sides of the fixed block, when the two arc-shaped clamps are clamped and stabilized according to the size of the pipe, the block and one of the slots will be on the same horizontal line. At this time, according to the rebound and contraction of spring 1, the block will be pushed into the inside of the corresponding slot.

[0014] Furthermore, the end of the clamping block away from the spring is arc-shaped, and the shape and size of the clamping slot are consistent with the arc-shaped end of the clamping block.

[0015] By adopting the above technical solution, the shape and size of the card slot are consistent with the arc-shaped end of the card block, so that the card block can better enter the card slot and also makes it easier to separate the card block from the card slot.

[0016] Furthermore, the detection component includes a rack fixedly connected to the inside of the arc frame, a rotating shaft is rotatably connected to the inside of the adjustment block, a motor is fixedly connected to one side of the adjustment block, the output end of the motor is fixedly connected to one end of the rotating shaft, a gear is fixedly connected to the rotating shaft, the gear is meshed with the rack, and the motor is electrically connected to the battery.

[0017] By adopting the above technical solution, the gear is driven to rotate continuously by the rotating shaft. Since the gear is meshed with the rack, as the gear continues to rotate, the gear will move along the rack, driving the adjustment block to slide along the inside of the arc frame, thereby driving the ultrasonic probe at the bottom to move together.

[0018] Furthermore, two support blocks are symmetrically fixedly connected to the inner wall of the adjustment block, and sliders are fixedly connected to the upper and lower ends of the two support blocks. Guide grooves are symmetrically opened on both sides of the interior of the arc frame, and the sliders are slidably connected to the inside of the guide grooves.

[0019] By adopting the above technical solution, the sliding guide of the slider and the guide groove will drive the adjustment block to slide along the inside of the arc frame, thereby driving the ultrasonic probe at the bottom to move together.

[0020] Furthermore, the protection component includes two fixed columns symmetrically fixedly connected to the bottom of the adjustment block, the interior of the two fixed columns is slidably connected to a sliding column, the interior of the two fixed columns is fixedly connected to a spring 2, one end of the spring 2 is fixedly connected to one end of the sliding column, and the opposite surfaces of the two sliding columns are rotatably connected to a roller.

[0021] By adopting the above technical solution, during the rolling process, the elasticity of spring 2 will always push the roller to contact the natural gas pipeline, so that the ultrasonic probe will not collide with the natural gas pipeline, avoiding friction damage to the ultrasonic probe during movement, and improving the service life of the ultrasonic probe.

[0022] In summary, this application has at least one of the following beneficial effects: 1. This application is provided with a stabilizing component and a detecting component. First, by toggling the stabilizing component, the support frame can be stabilized on the natural gas pipeline to reduce the situation where the device becomes loose during the detection process and deviates from the weld. Then, the detecting component inside the arc frame is started to operate, driving the ultrasonic probe to perform cyclic detection on the weld, and observing the fluctuation of the ultrasonic wave in real time. Through the above operation, the fully automatic detection of the weld of the natural gas pipeline is realized, and there is no need for the staff to manually rotate the handheld ultrasonic instrument along the pipeline weld, which greatly improves the detection efficiency, effectively improves the subjectivity and accuracy of the detection results, and makes the detection process more convenient.

[0023] 2. In this application, a limiting member is provided. As the shift block pushes the sliding block to move inside the fixed block, it also drives the connecting block to move, thereby pushing the card block into the corresponding card slot, and effectively stabilizing the position of the two arc-shaped clamps, so that the arc-shaped clamps can always maintain the clamping of the natural gas pipeline during the inspection process, so that the support frame can be firmly attached to the natural gas pipeline, reducing the situation where the device becomes loose during the inspection process and deviates from the weld.

[0024] 3. This application is provided with a protective component. During the rolling process, the elasticity of spring 2 will always push the roller to contact the natural gas pipeline. The contact barrier between the two rollers and the natural gas pipeline can prevent the ultrasonic probe from colliding with the natural gas pipeline, thereby avoiding friction damage to the ultrasonic probe during movement and improving the service life of the ultrasonic probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body in this application.

[0026] Figure 2 It is a schematic diagram of the three-dimensional structure of the stabilizing component in this application.

[0027] Figure 3 It is a schematic diagram of the three-dimensional structure of the limiting member in this application.

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure of the detection component in this application.

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the detection component in this application.

[0030] Description of reference numerals: 1. Support frame; 2. Arc frame; 3. Battery; 4. Fixed block; 5. Adjustment block; 6. Ultrasonic probe; 7. Sliding block; 8. Connecting plate; 9. Arc splint; 10. Rubber pad; 11. Slide groove; 12. Shift block; 13. Connecting block; 14. Groove; 15. Spring 1; 16. Block; 17. Slot; 18. Rack; 19. Rotating shaft; 20. Motor; 21. Gear; 22. Support block; 23. Slider; 24. Guide groove; 25. Fixed column; 26. Sliding column; 27. Spring 2; 28. Roller. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 —5 provides further details of this application.

[0032] The embodiment of the present application discloses a nondestructive detection device for cracks in fusion welding seams of natural gas pipelines.

[0033] Reference Figure 1 A nondestructive detection device for cracks in fusion welding seams of natural gas pipelines includes a support frame 1. The interior of the support frame 1 is semicircular. An arc frame 2 is fixedly connected to the interior of the support frame 1. A battery 3 is fixedly connected to the top of the support frame 1. Fixed blocks 4 are fixedly connected to both sides of the support frame 1. An adjustment block 5 is slidably connected to the interior of the arc frame 2. An ultrasonic probe 6 is fixedly connected to the bottom of the adjustment block 5. The ultrasonic probe 6 is electrically connected to the battery 3, and the ultrasonic probe 6 is electrically connected to an external controller. A stabilizing component is installed inside the fixed block 4, a detection component is installed inside the arc frame 2, and a protective component is installed at the bottom of the adjustment block 5.

[0034] When in use, first carry the device to the natural gas pipeline to be inspected, then set up the support frame 1 above the pipeline, and adjust the position of the support frame 1 so that the ultrasonic probe 6 and the weld are at the same horizontal line, and then clamp and fix the natural gas pipeline inside the support frame 1 by toggling the stabilizing component inside the fixing block 4, so that the support frame 1 can be firmly fixed on the natural gas pipeline, reducing the situation where the device becomes loose and deviates from the weld during the inspection process, so as not to affect the inspection results. At the same time, through the operation of the stabilizing component, the device can also be matched and installed on natural gas pipelines of different sizes and models, greatly increasing the versatility of the device and enabling the device to be used in a variety of environments. When the position of the device is fixed, the detection component inside the arc frame 2 can be started to operate, so that the adjustment block 5 drives the ultrasonic probe 6 to move back and forth inside the arc frame 2, so that the weld is cyclically inspected by the moving ultrasonic probe 6, and then the fluctuation of the ultrasonic wave is observed in real time to determine whether there is a defect in the weld. And at the same time of detection, the ultrasonic probe 6 can also be protected by adjusting the protective component at the bottom of the block 5 to avoid the ultrasonic probe 6 from being damaged by friction during movement, thereby increasing the service life of the ultrasonic probe 6. Finally, when the detection is completed, the clamping fixation of the pipeline can be released, and then the support frame 1 can be rotated to move the support frame 1 to the other half of the pipeline that has not been detected. Then the device is fixed again and the above operation is repeated to achieve all-round and no-dead-angle detection of the weld. Through the above operation, fully automatic detection of the welds of the natural gas pipeline is realized, and there is no need for the staff to manually rotate the ultrasonic instrument along the weld of the pipeline, which greatly improves the detection efficiency, effectively improves the subjectivity and accuracy of the detection results, and makes the detection process more convenient.

[0035] Reference Figure 1 and Figure 2 The stabilizing component includes a sliding block 7 that is slidably connected to the inside of the two fixed blocks 4. A connecting plate 8 is fixedly connected to one side of the sliding block 7. An arc-shaped splint 9 is fixedly connected to the end of the connecting plate 8 away from the sliding block 7. The connecting plate 8 is slidably connected to both sides of the support frame 1. A limiting member is symmetrically provided on one side of the sliding block 7. A rubber pad 10 is fixedly connected to the inner wall of the arc-shaped splint 9. A sliding groove 11 is provided on the top of the two fixed blocks 4. A shift block 12 is fixedly connected to the top of the sliding block 7, and the shift block 12 is slidably connected in the sliding groove 11.

[0036] When in use, first push the shift block 12 to slide inside the slide groove 11, so that the shift block 12 will drive the sliding block 7 and the limiter to slide together inside the fixed block 4, and the movement of the sliding block 7 will drive the two connecting plates 8 to move closer to each other inside the support frame 1. At this time, the two connecting plates 8 will make the two arc-shaped clamping plates 9 move closer together inside the support frame 1. When the two rubber pads 10 on the inner walls of the two arc-shaped clamping plates 9 are respectively fitted with the outer wall of the pipe, the shift block 12 can be stopped from moving. When the shift block 12 pushes the sliding block 7 to move, it will also drive the limiter to move. When the two arc-shaped clamping plates 9 are fitted with the outer wall of the pipe, the shift block 12 can be stopped from moving. After the clamp 9 firmly clamps the outer wall of the pipeline, the position of the arc clamp 9 can be limited and stabilized by the limiter, so that the arc clamp 9 can always keep clamping the natural gas pipeline during the detection process, so that the support frame 1 can be firmly on the natural gas pipeline, reducing the loosening of the device during the detection process and causing deviation from the weld to avoid affecting the detection results. At the same time, by adjusting the position of the two arc clamps 9, the device can also be matched and installed on natural gas pipelines of different sizes and models, which greatly increases the versatility of the device and enables the device to be used in a variety of environments.

[0037] Reference Figure 2 and Figure 3 The limiter includes two connecting blocks 13 symmetrically fixedly connected to one side of the sliding block 7. A groove 14 is provided inside the two connecting blocks 13. A spring 15 is fixedly connected to the inside of the groove 14. A clamping block 16 is slidably connected to the inside of the groove 14. One end of the spring 15 away from the inner wall of the connecting block 13 is fixedly connected to one end of the clamping block 16. A plurality of clamping grooves 17 are evenly provided on both sides of the interior of the two fixed blocks 4. The end of the clamping block 16 away from the spring 15 is arc-shaped, and the shape and size of the clamping groove 17 are consistent with the arc-shaped end of the clamping block 16.

[0038] When in use, as the shift block 12 pushes the sliding block 7 to move inside the fixed block 4, it will also drive the connecting block 13 to move. In the process of moving the connecting block 13, the inner wall of the fixed block 4 is squeezed, which will first make the clamping block 16 enter the interior of the groove 14. Because there are multiple clamping grooves 17 on both sides of the fixed block 4, and the shape and size of the clamping grooves 17 are consistent with the arc-shaped ends of the clamping blocks 16, when the two arc-shaped clamping plates 9 are clamped and stabilized according to the size of the pipeline, the clamping block 16 and one of the clamping grooves 17 will be at the same horizontal line. At this time, according to the rebound contraction of the spring 15, the clamping block 16 will be pushed into the interior of the corresponding clamping groove 17. In this way, the position of the two arc-shaped clamping plates 9 can be effectively stabilized through the cooperation of the clamping block 16 and the clamping groove 17, so that the arc-shaped clamping plates 9 can always maintain the clamping of the natural gas pipeline during the detection process, so that the support frame 1 can be firmly on the natural gas pipeline, reducing the loosening of the device during the detection process and causing deviation from the weld, so as not to affect the detection result.

[0039] Reference Figure 1 、 Figure 4 and Figure 5 The detection component includes a rack 18 fixedly connected to the inside of the arc frame 2, a rotating shaft 19 is rotatably connected to the inside of the adjustment block 5, a motor 20 is fixedly connected to one side of the adjustment block 5, the output end of the motor 20 is fixedly connected to one end of the rotating shaft 19, a gear 21 is fixedly connected to the rotating shaft 19, the gear 21 is meshed with the rack 18, the motor 20 is electrically connected to the battery 3, and two support blocks 22 are symmetrically fixedly connected to the inner wall of the adjustment block 5. The upper and lower ends of the two support blocks 22 are fixedly connected to sliders 23. Guide grooves 24 are symmetrically opened on both sides of the interior of the arc frame 2, and the sliders 23 are slidably connected to the inside of the guide grooves 24.

[0040] When in use, first start the motor 20 to drive the rotating shaft 19 to rotate, thereby driving the gear 21 to rotate continuously through the rotating shaft 19, and because the gear 21 is meshed with the rack 18, as the gear 21 continues to rotate, the gear 21 will move along the rack 18. At this time, the sliding guidance of the slider 23 and the guide groove 24 will drive the adjustment block 5 to slide along the inside of the arc frame 2, thereby driving the ultrasonic probe 6 at the bottom to move together. Since the arc frame 2 is arc-shaped, the ultrasonic probe 6 will move back and forth along the arc surface of the pipeline, thereby performing cyclic detection on the weld by the moving ultrasonic probe 6, and then observing the fluctuation of the ultrasonic wave in real time to determine whether there is a defect in the weld. Through the above operation, fully automatic detection of the weld of the natural gas pipeline is realized, and there is no need for the staff to manually rotate the ultrasonic instrument along the weld of the pipeline, which greatly improves the detection efficiency, effectively improves the subjectivity and accuracy of the detection results, and makes the detection process more convenient.

[0041] Reference Figure 1 、 Figure 4 and Figure 5 The protection component includes two fixed columns 25 symmetrically fixedly connected to the bottom of the adjustment block 5, and the interior of the two fixed columns 25 is slidably connected to the sliding column 26. The interior of the two fixed columns 25 is fixedly connected to a spring 27, and one end of the spring 27 is fixedly connected to one end of the sliding column 26. The opposite surfaces of the two sliding columns 26 are rotatably connected with a roller 28.

[0042] During use, if the natural gas pipeline is large, in order to avoid the ultrasonic probe 6 from colliding with the outer wall of the natural gas pipeline, when the support frame 1 is installed on the natural gas pipeline, the roller 28 will fit with the natural gas pipeline, and as the adjustment block 5 drives the ultrasonic probe 6 to move, it will drive the two rollers 28 to roll along the natural gas pipeline, and during the rolling process, the elasticity of the spring 2 27 will always push the roller 28 to contact the natural gas pipeline, so that the contact between the two rollers 28 and the natural gas pipeline is blocked, so that the ultrasonic probe 6 will not collide with the natural gas pipeline, thereby avoiding friction damage to the ultrasonic probe 6 during movement, and improving the service life of the ultrasonic probe 6.

[0043] The implementation principle of the non-destructive detection device for cracks in fusion welding seams of natural gas pipelines in this embodiment is as follows: when in use, first carry the device to the side of the natural gas pipeline to be inspected, then set up the support frame 1 above the pipeline, and adjust the position of the support frame 1 so that the ultrasonic probe 6 and the weld are on the same horizontal line, and then push the shift block 12 to slide inside the slide groove 11, so that the shift block 12 will drive the sliding block 7 and the limiter to slide together inside the fixed block 4, and the movement of the sliding block 7 will drive the two connecting plates 8 to approach each other inside the support frame 1, and at this time, the two arc-shaped splints 9 will be brought close together inside the support frame 1 through the two connecting plates 8, and when the two rubber pads 10 on the inner walls of the two arc-shaped splints 9 are respectively attached to the outer wall of the pipeline , you can stop pushing the shift block 12 to move, and when the shift block 12 pushes the sliding block 7 to move, it will also drive the limiter to move. When the two arc-shaped clamping plates 9 firmly clamp the outer wall of the pipeline, the limiter can limit and stabilize the position of the arc-shaped clamping plates 9, so that the arc-shaped clamping plates 9 can always maintain the clamping of the natural gas pipeline during the detection process, so that the support frame 1 can be firmly on the natural gas pipeline, reducing the loosening of the device during the detection process, resulting in deviation from the weld, so as not to affect the detection results. At the same time, by adjusting the position of the two arc-shaped clamping plates 9, the device can also be matched and installed on natural gas pipelines of different sizes, which greatly increases the versatility of the device and enables the device to be used in a variety of environments; Secondly, as the dial block 12 pushes the sliding block 7 to move inside the fixed block 4, it will also drive the connecting block 13 to move. In the process of moving the connecting block 13, the inner wall of the fixed block 4 is squeezed, which will first make the clamping block 16 enter the inside of the groove 14. Because there are multiple clamping grooves 17 on both sides of the fixed block 4, and the shape and size of the clamping grooves 17 are consistent with the arc-shaped ends of the clamping blocks 16, when the two arc-shaped clamping plates 9 are clamped and stabilized according to the size of the pipeline, the clamping block 16 and one of the clamping grooves 17 will be at the same horizontal line. At this time, according to the rebound contraction of the spring 15, the clamping block 16 will be pushed into the inside of the corresponding clamping groove 17. In this way, through the cooperation of the clamping block 16 and the clamping groove 17, the positions of the two arc-shaped clamping plates 9 can be effectively stabilized, so that the arc-shaped clamping plates 9 can always maintain the clamping of the natural gas pipeline during the detection process, so that the support frame 1 can be stable in the natural gas pipeline. On the gas pipeline, the device is reduced from loosening during the detection process, resulting in deviation from the weld, so as not to affect the detection results. When the position of the device is fixed, the motor 20 can be started to drive the rotating shaft 19 to rotate, thereby driving the gear 21 to rotate continuously through the rotating shaft 19. Since the gear 21 is meshed with the rack 18, as the gear 21 continues to rotate, the gear 21 will move along the rack 18. At this time, the sliding guide of the slider 23 and the guide groove 24 will drive the adjustment block 5 to slide along the inside of the arc frame 2, thereby driving the ultrasonic probe 6 at the bottom to move together. Since the arc frame 2 is arc-shaped, the ultrasonic probe 6 will move back and forth along the arc surface of the pipeline, thereby performing cyclic detection on the weld through the moving ultrasonic probe 6, and then observing the fluctuation of the ultrasonic wave in real time to determine whether there is a defect in the weld. During the inspection, if the natural gas pipeline is large, in order to avoid the ultrasonic probe 6 from colliding with the outer wall of the natural gas pipeline, when the support frame 1 is installed on the natural gas pipeline, the roller 28 will be in contact with the natural gas pipeline. As the adjustment block 5 drives the ultrasonic probe 6 to move, the two rollers 28 will be driven to roll along the natural gas pipeline. During the rolling process, the elasticity of the spring 27 will always push the roller 28 to contact the natural gas pipeline. In this way, the contact between the two rollers 28 and the natural gas pipeline can prevent the ultrasonic probe 6 from colliding with the natural gas pipeline, avoid friction damage to the ultrasonic probe 6 during movement, and improve the service life of the ultrasonic probe 6. Finally, when the inspection is completed, the clamping of the pipeline can be released, and then the support frame 1 can be rotated to move the support frame 1 to the other half of the pipeline that has not been inspected. Then, the device is fixed again and the above operation is repeated to achieve all-round and no-dead-angle inspection of the weld. Through the above operation, fully automatic inspection of the natural gas pipeline weld is achieved, and there is no need for the staff to manually rotate the ultrasonic instrument along the pipeline weld, which greatly improves the inspection efficiency, effectively improves the subjectivity and accuracy of the inspection results, and makes the inspection process more convenient.

Claims

1. A non-destructive testing device for cracks in fusion welding seams of natural gas pipelines, comprising a support frame (1), characterized in that: The interior of the support frame (1) is semicircular, the interior of the support frame (1) is fixedly connected to an arc frame (2), the top of the support frame (1) is fixedly connected to a battery (3), both sides of the support frame (1) are fixedly connected to fixed blocks (4), the interior of the arc frame (2) is slidably connected to an adjustment block (5), the bottom of the adjustment block (5) is fixedly connected to an ultrasonic probe (6), the ultrasonic probe (6) is electrically connected to the battery (3), and the ultrasonic probe (6) is electrically connected to an external controller, a stabilizing component is installed inside the fixed block (4), a detection component is installed inside the arc frame (2), and a protection component is installed at the bottom of the adjustment block (5).

2. The nondestructive testing device for cracks in fusion welding of natural gas pipelines according to claim 1 is characterized in that: The stabilizing component includes a sliding block (7) slidably connected to the inside of two fixed blocks (4), a connecting plate (8) is fixedly connected to one side of the sliding block (7), an arc-shaped clamping plate (9) is fixedly connected to one end of the connecting plate (8) away from the sliding block (7), the connecting plate (8) is slidably connected to both sides of the support frame (1), and a limiting member is symmetrically provided on one side of the sliding block (7).

3. The nondestructive testing device for cracks in fusion welding of natural gas pipelines according to claim 2 is characterized in that: The inner wall of the arc-shaped clamping plate (9) is fixedly connected with a rubber pad (10), the tops of the two fixed blocks (4) are each provided with a sliding groove (11), the top of the sliding block (7) is fixedly connected with a shifting block (12), and the shifting block (12) is slidably connected in the sliding groove (11).

4. The nondestructive testing device for cracks in fusion welding of natural gas pipelines according to claim 2 is characterized in that: The limiting member comprises two connecting blocks (13) symmetrically fixedly connected to one side of the sliding block (7), a groove (14) is provided inside the two connecting blocks (13), a spring 1 (15) is fixedly connected inside the groove (14), a clamping block (16) is slidably connected inside the groove (14), one end of the spring 1 (15) away from the inner wall of the connecting block (13) is fixedly connected to one end of the clamping block (16), and a plurality of clamping grooves (17) are evenly provided on both sides of the interior of the two fixed blocks (4).

5. The nondestructive testing device for cracks in fusion welding of natural gas pipelines according to claim 4 is characterized in that: The end of the clamping block (16) away from the spring (15) is arc-shaped, and the shape and size of the clamping slot (17) are consistent with the arc-shaped end of the clamping block (16).

6. The nondestructive testing device for cracks in fusion welding of natural gas pipelines according to claim 1 is characterized in that: The detection assembly includes a rack (18) fixedly connected to the inside of the arc frame (2); a rotating shaft (19) is rotatably connected to the inside of the adjustment block (5); a motor (20) is fixedly connected to one side of the adjustment block (5); an output end of the motor (20) is fixedly connected to one end of the rotating shaft (19); a gear (21) is fixedly connected to the rotating shaft (19); the gear (21) is meshed with the rack (18); and the motor (20) is electrically connected to the battery (3).

7. The nondestructive testing device for cracks in fusion welding of natural gas pipelines according to claim 1 is characterized by: Two support blocks (22) are symmetrically fixedly connected to the inner wall of the adjustment block (5), and the upper and lower ends of the two support blocks (22) are fixedly connected to sliders (23). Guide grooves (24) are symmetrically opened on both sides of the interior of the arc frame (2), and the sliders (23) are slidably connected inside the guide grooves (24).

8. The nondestructive testing device for cracks in fusion welding of natural gas pipelines according to claim 1 is characterized by: The protection assembly comprises two fixed columns (25) symmetrically fixedly connected to the bottom of the adjustment block (5), the interiors of the two fixed columns (25) are slidably connected to the sliding columns (26), the interiors of the two fixed columns (25) are fixedly connected to the second spring (27), one end of the second spring (27) is fixedly connected to one end of the sliding column (26), and the opposite surfaces of the two sliding columns (26) are rotatably connected to the roller (28).

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