A detection device and method for detecting cracks on inner and outer surfaces of a special-shaped pipe

Abstract

The application relates to the technical field of pipe detection, in particular to a detection device and method for detecting cracks on the inner and outer surfaces of special-shaped pipes, which comprises a chassis, a mounting plate, a first clamping assembly, a rotating assembly, a conveying assembly, a detection assembly, a fitting assembly and an external detector which are mechanically linked through a connecting rod mechanism. When the first driving roller self-adaptively fits the pipe diameter and curvature, the external detector is synchronously driven to automatically adjust to a standard detection interval, manual calibration is not needed, the problem of detection interval fluctuation under different pipe diameters is effectively solved, the signal-to-noise ratio and quantitative comparability of the detection signal are guaranteed, the spring-driven clamping plate and the driving roller can self-adaptively fit the pipe ovality and local concave-convex, full-circumferential uniform fitting is achieved, and the detection blind area is reduced.

Description

Technical Field

[0001] This invention relates to the field of pipe fitting inspection technology, specifically to a detection device and method for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings. Background Technology

[0002] As is well known, irregularly shaped pipe fittings, such as bends and reducers, are widely used in petrochemical, aerospace and other fields. The detection of cracks on their inner and outer surfaces is an important part of ensuring the safe operation of equipment. During the detection process, the degree of stable contact between the probe and the surface of the pipe fitting being tested directly affects the signal-to-noise ratio and crack detection rate. Especially for the detection of the outer surface, how to ensure that the probe maintains a constant contact pressure and detection spacing on the surface of pipe fittings with different diameters and curvatures is a key technical problem that needs to be solved in the design of crack detection devices for irregularly shaped pipe fittings.

[0003] A search revealed that Chinese Patent Publication No. CN115980301A discloses a crack detection device. Its detection mechanism includes a fixed frame and an adaptive telescopic rod mounted on the fixed frame. The adaptive telescopic rod has rollers that make tangential contact with the outer circumferential surface of the pipe being tested. Simultaneously, a crack detection probe assembly is mounted on the telescopic rod via a probe positioning mechanism. The core feature of this solution is that the detection device remains stationary, while the pipe being tested rotates via a chuck positioning structure. The probe contacts the outer surface of the pipe under the drive of the adaptive telescopic rod. However, this solution requires the pipe being tested to be in a rotating state during the detection process, making it unsuitable for large, fixed, non-rotating pipe assemblies. Although the adaptive telescopic rod can generate radial displacement with changes in pipe diameter, its structure only provides elastic pre-tightening in a single direction. When the pipe surface has ellipticity or local unevenness, the uniformity of the probe's contact with the pipe wall is difficult to guarantee. The relative relationship between the probe's installation position on the telescopic rod and the rollers changes when the telescopic rod moves, causing fluctuations in the detection distance between the probe and the pipe wall.

[0004] A search revealed that Chinese Patent Publication No. CN218995243U discloses a chain-type adaptive detection probe holder. This holder uses a multi-channel chain probe group to circumferentially cover part of the outer wall of the pipe to be tested. The curvature of the covering of the chain probe group is adjusted by a clamping device to adapt to pipes with different outer diameters. This solution achieves adaptive fitting of the multi-probe array within a large diameter range through a flexible chain structure, resulting in fewer detection blind spots. However, this solution has a complex structure. The links of the chain probe group are connected by hinges, requiring multi-degree-of-freedom centering calibration with a rotation adjustment device and a lateral adjustment device. This results in high manufacturing costs and cumbersome debugging. In addition, after the probe group covers the pipe wall, it lacks the function of actively driving the axial movement of the pipe, and the detection coverage is limited by the installation position of the probe holder.

[0005] A search revealed that Chinese Patent Publication No. CN202311002887 discloses a high-speed dynamic detection adaptive probe for defects in buried pipelines. It consists of three flexible support platforms—front, middle, and rear—connected sequentially by a retractable flexible connection mechanism. Each support platform is equipped with a sensor array, forming an adaptively bending chain structure. This solution has certain advantages in adaptability to axial bending of pipelines. However, its sensor array is mainly based on electromagnetic principles and has high structural complexity. The fit between the probe and the pipe wall relies on the flexible deformation of the support platform, lacking consistent control over the fit pressure.

[0006] The aforementioned existing technologies have all made beneficial progress in addressing the adaptive contact problem of probes in the detection of cracks on the outer surface of pipe fittings. Their common technical approach is to use elastic telescopic rods, chain-type hinged rods, or flexible load-bearing platforms to enable the probe or probe holder to passively deform with changes in the outer diameter of the pipe fitting, thereby achieving contact and contact between the probe and the pipe wall. However, this technical approach still has the following shortcomings in practical applications:

[0007] First, there is a structural contradiction between variable diameter adaptive design and fixed probe installation. In existing solutions, the probe is usually mounted on an elastic telescopic rod or a flexible support platform. When the pipe diameter changes, the elastic element drives the probe to move radially to fit the pipe wall. However, after the probe moves radially, the detection distance between it and the pipe wall depends on the compression of the elastic element and the installation accuracy. The lack of mechanical linkage constraint makes it difficult to keep the detection distance consistent under different pipe diameters, affecting the quantitative comparability of the detection signal.

[0008] Secondly, the adaptive fitting structure and the axial drive function of the pipe fitting are disconnected. In the existing solution, the probe fitting structure and the axial movement drive of the pipe fitting are completed by independent mechanisms. The detection device is fixed, while the pipe fitting under test is rotated and moved axially by an external turntable. This design cannot be applied when testing pipe groups that are fixedly installed on site, because the two ends of the pipe on site are fixed by flanges and cannot be rotated or moved.

[0009] Third, multi-degree-of-freedom calibration mechanisms are complex and inconvenient to operate on-site. Although solutions represented by chain probe frames have achieved a wide range of outer diameter adaptation, their supporting rotary adjustment devices and lateral adjustment devices require calibration of multiple degrees of freedom one by one, which is cumbersome to operate and requires high skill from operators, thus limiting the on-site promotion and use of the device. Summary of the Invention

[0010] Technical problems to be solved

[0011] To overcome the problems of existing detection devices and methods for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings, such as structural contradictions between diameter adaptation and probe fixed installation, disconnect between the adaptive fitting structure and the axial driving function of the pipe fitting, complexity of the multi-degree-of-freedom calibration mechanism, and inconvenience of on-site operation, this invention provides a detection device and method for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings.

[0012] Technical solution

[0013] To achieve the above objectives, the present invention provides the following technical solution: a detection device and method for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings, comprising:

[0014] Base frame;

[0015] Mounting plate, which is detachably mounted on the top of the base frame;

[0016] A first clamping assembly is mounted on both sides of the top of the mounting plate;

[0017] A rotating assembly, the rotating assembly being mounted on both sides of the top of the mounting plate;

[0018] A conveying assembly, which is mounted on the side of the mounting plate;

[0019] A detection component, which is mounted on top of the first clamping component on one side;

[0020] The detection component includes a support frame, which is fixedly mounted on the top of the first clamping component. A rotating shaft is rotatably mounted on the support frame. A first rotating plate is rotatably mounted on the side of the rotating shaft. A first connecting plate is fixedly mounted on one side of the first rotating plate. A fitting component is rotatably mounted on the side of the first connecting plate. The fitting component fits into the pipe. An external detector is mounted on the side of the first clamping component.

[0021] A second connecting plate is fixedly provided on the side of the first rotating plate, a first rotating rod is rotatably provided on the bottom of the second connecting plate, a second rotating rod is rotatably provided on the side of the first rotating rod, the second rotating rod is rotatably provided with the external detector, a first fixing frame is fixedly provided on the side of the first clamping assembly, the first fixing frame is rotatably provided with the center of the second rotating rod, a first spring is sleeved on the rotating shaft, and the first spring is fixedly provided with the first rotating plate.

[0022] The bonding assembly includes a mounting frame, which is rotatably mounted on the side of the first connecting plate. A first sleeve is fixedly mounted on the mounting frame. First sleeve rods are slidably mounted on both sides of the first sleeve. Clamping plates are fixedly mounted on the sides of the first sleeve rods and are in contact with both sides of the pipe fitting. A second spring is fixedly mounted inside the first sleeve and is fixedly mounted to the first sleeve rod. A first drive roller is rotatably mounted at the bottom of the mounting frame and is in contact with the top of the pipe fitting.

[0023] The rotating assembly includes a second slide groove, and a second slider is slidably disposed in the second slide groove;

[0024] The conveying assembly includes a clamping frame, a movable rod fixedly disposed at the bottom of the clamping frame, a second sleeve rod fixedly disposed on the side of the movable rod, a third rotating rod rotatably disposed at the bottom of the second sleeve rod, a base fixedly disposed between the bottoms of the second sliders, a fourth rotating rod rotatably disposed at the bottom of the base, the fourth rotating rod and the third rotating rod being rotatably disposed, and a vertical frame fixedly disposed at the bottom of the base frame, the vertical frame being rotatably disposed at the center of the fourth rotating rod;

[0025] On the other side, a winding spool is provided on the top of the first clamping assembly, a guide wire is wound on the winding spool, an internal detector is fixedly provided at the bottom of the guide wire, a second fixing frame is fixedly provided on the top of the internal detector, a second rotating roller is rotatably provided on the second fixing frame, a fourth motor is fixedly provided at the bottom of the second fixing frame, a second transmission belt is provided between the fourth motor and the second rotating roller, a third fixing frame is fixedly provided on both sides of the second fixing frame, and a magnet is fixedly provided on the top of the third fixing frame, the magnet being adapted to the interior of the tube.

[0026] Preferably, the first clamping assembly includes two sets of mounting blocks, upper and lower. The mounting blocks at the bottom are detachably mounted on the top two sides of the mounting plate. Each set of mounting blocks has a first sliding groove at its top. A first slider is slidably mounted on both sides of the first sliding groove. A return spring is fixedly mounted in the first sliding groove and fixedly mounted to the first slider. A first bent plate is fixedly mounted on the top of the first slider. A first mounting groove is provided on the bottom and side of the first bent plate. A second drive roller is rotatably mounted in the first mounting groove. A bottom frame is fixedly mounted on the side of the bottom mounting block. A sleeve frame is rotatably mounted on the top of the bottom frame via a hinge. A sleeve plate is slidably mounted in the sleeve frame. The side of the sleeve plate is fixedly mounted to the top mounting block. A limiting groove adapted to the first bent plate is provided on the side of both the bottom frame and the sleeve plate. A support frame is fixedly mounted to the bottom mounting block. A first fixing frame is fixedly mounted on the side of the top mounting block.

[0027] Furthermore, the second slider has rotating grooves on both sides of its top, and a first rotating column is rotatably arranged in the rotating groove. A first bonding plate is rotatably arranged on the first rotating column, and a third spring is sleeved on the first rotating column. The third spring is fixedly arranged with the first bonding plate. A first rotating roller is rotatably arranged on the side of the first bonding plate. The first rotating roller is in contact with the side of the tube. A first protective cover is fixedly arranged on the side of the first bonding plate. A first motor is fixedly arranged inside the first protective cover. The output shaft of the first motor is connected to the first rotating roller by a key.

[0028] Furthermore, the conveying assembly also includes a horizontal plate with a third sliding groove. Third sliders are slidably arranged on both sides of the third sliding groove. A sliding frame is fixedly arranged on the top of the third slider. The side of the sliding frame is fixedly arranged with the clamping frame. A bidirectional lead screw is rotatably arranged in the third sliding groove. The bidirectional lead screw and the third slider are connected by threads. A second motor is fixedly arranged at the bottom of the horizontal plate. A first pulley is fixedly arranged at the output shaft of the second motor and the center of the bidirectional lead screw. A first transmission belt is arranged between the first pulleys.

[0029] In a further embodiment, an anti-slip plate is slidably mounted on the clamping frame, and several anti-slip points are fixedly mounted on the anti-slip plate. Limiting posts are fixedly mounted on both sides of the anti-slip plate, and the limiting posts are slidably mounted with the clamping frame. The limiting post located at the bottom is slidably mounted with the sliding frame. A threaded handle is threadedly mounted on the side of the clamping frame, and the threaded handle is rotatably mounted with the anti-slip plate.

[0030] Based on the aforementioned scheme, a second sleeve is slidably arranged between the second sleeve rods, a support plate is fixedly arranged on the side of the second sleeve, a rack is fixedly arranged on the top of the support plate, a third motor is fixedly arranged on the bottom of the base frame, and a gear is connected to the output shaft of the third motor by a key, the gear meshing with the rack.

[0031] The detection method for a detection device used to detect cracks on the inner and outer surfaces of irregularly shaped pipe fittings includes the following steps:

[0032] S1: First, fix the pipe by placing it on the first bent plate at the bottom. The first bent plate at the bottom, in conjunction with the return spring and the second drive roller, ensures that the first bent plate at the bottom always fits against the bottom of the pipe. Then, rotate the sleeve and adjust the position of the sleeve plate so that the first bent plate at the top always fits against the top of the pipe, thus fixing the pipe.

[0033] S2: Then rotate the pipe. The first bonding plate at the bottom, together with the third spring and the first rotating roller, makes the first bonding plate stick tightly to the bottom of the pipe. Drive the first motor. The first motor drives the first rotating roller to rotate, so that the pipe rotates.

[0034] S3: To inspect the pipeline, first place the mounting frame on top of the pipeline, so that the first drive roller is in contact with the top of the pipeline. At this time, driven by the second spring, the clamping plate is in contact with both sides of the top of the pipeline in conjunction with the first sleeve rod. When the first drive roller is in close contact with the top of the pipeline, the first rotating plate is driven to rotate through the first connecting plate. The rotation of the first rotating plate drives the second connecting plate to rotate. The rotation of the second connecting plate drives the first rotating rod to rotate. The rotation of the first rotating rod drives the second rotating rod to rotate. The rotation of the second rotating rod drives the external detector to move through the first fixed frame, so that the distance between the external detector and the pipeline meets the inspection standard. Then, the internal detector is fixed inside the pipeline by magnets. The fourth motor is started to drive the second rotating roller to drive the internal detector to move and inspect the inside of the pipeline.

[0035] S4: After inspecting a section of pipe, move the pipe so that the external and internal detectors can inspect the new area. First, start the second motor. The second motor drives the bidirectional lead screw to rotate. The bidirectional lead screw drives the clamping frame to move and clamp the two sides of the pipe. Then start the third motor. The third motor works with the moving rod to drive the clamping frame to move. At the same time, the moving rod works with the second set of rods to drive the third rotating rod to rotate. The rotation of the third rotating rod works with the fourth rotating rod to drive the base to move. The movement of the base drives the second slider to move, causing the rotating component to fall off the pipe.

[0036] S5: After moving the pipeline to the new area to be inspected, repeat the above steps to inspect different locations of the pipeline.

[0037] Beneficial effects

[0038] This invention relates to a detection device and method for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings.

[0039] 1. The bonding component and the external detector are mechanically linked through a linkage mechanism. When the first drive roller adapts to the changes in pipe diameter and curvature, it simultaneously drives the external detector to automatically adjust to the standard detection spacing. No manual calibration is required, which effectively solves the problem of detection spacing fluctuation under different pipe diameters and ensures the signal-to-noise ratio and quantitative comparability of the detection signal. The spring-driven clamp and drive roller can adapt to the ellipticity and local concavity of the pipe to achieve uniform bonding in the full circumference and reduce detection blind spots.

[0040] 2. Integrating an external detector and a magnetic internal detector, it can simultaneously detect cracks on the inner and outer surfaces of pipe fittings without the need for separate internal and external inspection processes. The internal detector is attached to the pipe wall by a magnet and moves autonomously with its own drive roller. Internal inspection of fixed pipes can be completed on-site without disassembling the pipe, greatly expanding the applicable scenarios of the device.

[0041] 3. The conveying component and the rotating component are linked by a linkage mechanism. When the clamping frame clamps the pipe and moves axially, the rotating component automatically disengages from the pipe wall. After moving to the area to be inspected, the rotating component automatically resets and fits to drive the pipe to rotate, realizing seamless connection between inspection and conveying. Continuous automated inspection of long-distance pipes can be completed without manual intervention, significantly improving inspection efficiency.

[0042] 4. The upper and lower sets of elastic clamping components can adapt to pipes of different diameters. With the adjustable sleeve frame and sleeve plate structure, it can stably clamp various irregular pipes such as bends and reducers. The elastic first contact plate of the rotating component can adapt to the irregular shape of the pipe surface, ensuring the stability of the pipe rotation process and avoiding shaking during the test, which would affect the test results. Attached Figure Description

[0043] Figure 1 This is a side view of the structure of the present invention;

[0044] Figure 2 This is a schematic diagram of the mounting plate of the present invention;

[0045] Figure 3 This is a schematic diagram of the structure of the base frame of the present invention;

[0046] Figure 4 This is a schematic diagram of the structure of the first clamping component of the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of the first bent plate of the present invention;

[0048] Figure 6 This is a schematic diagram of the detection component of the present invention;

[0049] Figure 7 This is a schematic diagram of the bonding component of the present invention;

[0050] Figure 8 This is a schematic diagram of the structure of the conveying component of the present invention;

[0051] Figure 9 For the present invention Figure 8 A magnified schematic diagram of the partial structure at point A in the middle;

[0052] Figure 10 This is a schematic diagram of the anti-slip plate of the present invention;

[0053] Figure 11 For the present invention Figure 10 A magnified schematic diagram of the local structure at point B;

[0054] Figure 12 For the present invention Figure 10 A magnified schematic diagram of the local structure at point C;

[0055] Figure 13 This is a schematic diagram of the structure of the third rotating rod of the present invention;

[0056] Figure 14 This is a schematic diagram of the internal detector of the present invention.

[0057] In the diagram: 1. Base frame; 2. Mounting plate; 3. First clamping assembly; 4. Rotating assembly; 5. Conveying assembly; 6. Detection assembly; 7. Support frame; 8. Rotating shaft; 9. First rotating plate; 10. First connecting plate; 11. Fitting assembly; 12. External detector; 13. Second connecting plate; 14. First rotating rod; 15. Second rotating rod; 16. First fixing frame; 17. First spring; 18. Mounting frame; 19. First sleeve; 20. First sleeve rod; 21. Clamping plate; 22. Second spring; 23. First drive roller; 24. Mounting block; 25. First slide groove; 26. First slider; 27. Return spring; 28. First bending plate; 29. ​​First mounting groove; 30. Second drive roller; 31. Base frame; 32. Hinge; 33. Sleeve frame; 34. Sleeve plate; 35. Restriction groove; 36. Second slide groove; 37. Second slider; 38. Rotating groove; 39. First rotating... 40. Moving column; 41. First bonding plate; 42. Third spring; 43. First rotating roller; 44. First protective cover; 45. First motor; 46. Horizontal plate; 47. Third slide groove; 48. Third slider; 49. Sliding frame; 50. Clamping frame; 51. Bidirectional lead screw; 52. Second motor; 53. First pulley; 54. First transmission belt; 55. Anti-slip plate; 56. Anti-slip point; 57. Limiting post; 58. Threaded handle; 59. Moving rod; 60. Second sleeve rod; 61. Support plate; 62. Rack; 63. Third motor; 64. Gear; 65. Third rotating rod; 66. Base support; 67. Fourth rotating rod; 68. Vertical frame; 69. Winding spool; 70. Guide line; 71. Internal detector; 72. Second fixed frame; 73. Second rotating roller; 74. Fourth motor; 75. Second transmission belt; 76. Third fixed frame; 77. Magnet. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] See Figures 1 to 14 A detection device and method for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings, wherein a mounting plate 2 is detachably installed on the top of a base frame 1, a first clamping assembly 3 is installed on both sides of the top of the mounting plate 2, a rotating assembly 4 is installed on both sides of the top of the mounting plate 2, a conveying assembly 5 is installed on the side of the mounting plate 2, and a detection assembly 6 is installed on the top of the first clamping assembly 3 on one side.

[0060] The detection component 6 includes a support frame 7, which is fixedly mounted on the top of the first clamping component 3. A rotating shaft 8 is rotatably mounted on the support frame 7. A first rotating plate 9 is rotatably mounted on the side of the rotating shaft 8. A first connecting plate 10 is fixedly mounted on one side of the first rotating plate 9. A fitting component 11 is rotatably mounted on the side of the first connecting plate 10. The fitting component 11 fits into the pipe. An external detector 12 is mounted on the side of the first clamping component 3.

[0061] A second connecting plate 13 is fixedly installed on the side of the first rotating plate 9. A first rotating rod 14 is rotatably installed at the bottom of the second connecting plate 13. A second rotating rod 15 is rotatably installed on the side of the first rotating rod 14. The second rotating rod 15 is rotatably installed with the external detector 12. A first fixing frame 16 is fixedly installed on the side of the first clamping assembly 3. The first fixing frame 16 is rotatably installed at the center of the second rotating rod 15. A first spring 17 is sleeved on the rotating shaft 8. The first spring 17 is fixedly installed with the first rotating plate 9.

[0062] The bonding assembly 11 includes a mounting frame 18, which is rotatably disposed on the side of the first connecting plate 10. A first sleeve 19 is fixedly disposed on the mounting frame 18. A first sleeve rod 20 is slidably disposed on both sides of the first sleeve 19. A clamping plate 21 is fixedly disposed on the side of the first sleeve rod 20 and is in contact with both sides of the pipe fitting. A second spring 22 is fixedly disposed inside the first sleeve 19 and is fixedly disposed with the first sleeve rod 20. A first drive roller 23 is rotatably disposed at the bottom of the mounting frame 18 and is in contact with the top of the pipe fitting.

[0063] The first clamping assembly 3 includes two sets of mounting blocks 24, one upper and one lower. The mounting blocks 24 located at the bottom are detachably mounted on the top sides of the mounting plate 2. Each set of mounting blocks 24 has a first sliding groove 25 on its top. First sliders 26 are slidably mounted on opposite sides of the first sliding groove 25. A return spring 27 is fixedly mounted within the first sliding groove 25 and is fixedly mounted to the first slider 26. A first bent plate 28 is fixedly mounted on the top of the first slider 26. First mounting grooves 29 are provided on the bottom and sides of the first bent plate 28. The second drive roller 30 is rotatably installed inside the 9th mounting block. The bottom frame 31 is fixedly installed on the side of the bottom mounting block 24. The top of the bottom frame 31 is rotatably installed with a sleeve frame 33 via a hinge 32. The sleeve plate 34 is slidably installed inside the sleeve frame 33. The side of the sleeve plate 34 is fixedly installed with the top mounting block 24. The sides of the bottom frame 31 and the sleeve plate 34 are both provided with limiting grooves 35 that are adapted to the first curved plate 28. The support frame 7 is fixedly installed with the bottom mounting block 24. The first fixing frame 16 is fixedly installed on the side of the top mounting block 24.

[0064] The rotating assembly 4 includes a second slide groove 36, in which a second slider 37 is slidably disposed. Rotating grooves 38 are provided on both sides of the top of the second slider 37. A first rotating column 39 is rotatably disposed in the rotating groove 38. A first bonding plate 40 is rotatably disposed on the first rotating column 39. A third spring 41 is sleeved on the first rotating column 39. The third spring 41 is fixedly disposed with the first bonding plate 40. A first rotating roller 42 is rotatably disposed on the side of the first bonding plate 40. The first rotating roller 42 is in contact with the side of the pipe. A first protective cover 43 is fixedly disposed on the side of the first bonding plate 40. A first motor 44 is fixedly disposed inside the first protective cover 43. The output shaft of the first motor 44 is connected to the first rotating roller 42 by a key.

[0065] The conveying assembly 5 includes a horizontal plate 45, on which a third slide groove 46 is provided. Third sliders 47 are slidably arranged on both sides of the third slide groove 46. A sliding frame 48 is fixedly arranged on the top of the third slider 47. A clamping frame 49 is fixedly arranged on the side of the sliding frame 48. A bidirectional lead screw 50 is rotatably arranged in the third slide groove 46. The bidirectional lead screw 50 and the third slider 47 are connected by threads. A second motor 51 is fixedly arranged at the bottom of the horizontal plate 45. A first pulley 52 is fixedly arranged at the output shaft of the second motor 51 and the center of the bidirectional lead screw 50. A first transmission belt 53 is arranged between the first pulleys 52 for transmission.

[0066] An anti-slip plate 54 is slidably mounted on the clamping frame 49. Several anti-slip points 55 are fixedly mounted on the anti-slip plate 54. Limiting posts 56 are fixedly mounted on both sides of the anti-slip plate 54. The limiting posts 56 are slidably mounted with the clamping frame 49. The limiting post 56 at the bottom is slidably mounted with the sliding frame 48. A threaded handle 57 is threadedly mounted on the side of the clamping frame 49. The threaded handle 57 is rotatably mounted with the anti-slip plate 54.

[0067] A movable rod 58 is fixedly installed at the bottom of the clamping frame 49. A second sleeve rod 59 is fixedly installed on the side of the movable rod 58. A second sleeve 60 is slidably installed between the second sleeve rods 59. A support plate 61 is fixedly installed on the side of the second sleeve 60. A rack 62 is fixedly installed on the top of the support plate 61. A third motor 63 is fixedly installed at the bottom of the base frame 1. A gear 64 is connected to the output shaft of the third motor 63 by a key. The gear 64 meshes with the rack 62. A third rotating rod 65 is rotatably installed at the bottom of the second sleeve rod 59. A base support 66 is fixedly installed between the bottoms of the second sliders 37. A fourth rotating rod 67 is rotatably installed at the bottom of the base support 66. The fourth rotating rod 67 and the third rotating rod 65 are rotatably installed. A vertical frame 68 is fixedly installed at the bottom of the base frame 1. The vertical frame 68 is rotatably installed at the center of the fourth rotating rod 67.

[0068] On the other side, a winding spool 69 is fixedly installed on the top of the mounting block 24. A guide wire 70 is wound on the winding spool 69. An internal detector 71 is fixedly installed at the bottom of the guide wire 70. A second fixing frame 72 is fixedly installed on the top of the internal detector 71. A second rotating roller 73 is rotatably installed on the second fixing frame 72. A fourth motor 74 is fixedly installed at the bottom of the second fixing frame 72. A second transmission belt 75 is connected between the fourth motor 74 and the second rotating roller 73. A third fixing frame 76 is fixedly installed on both sides of the second fixing frame 72. A magnet 77 is fixedly installed on the top of the third fixing frame 76. The magnet 77 is adapted to the interior of the pipe.

[0069] First, refer to Figure 1 , Figure 6 and Figure 7 In this embodiment, the function of the detection component 6 is to realize the automatic detection of cracks on the outer surface of irregular pipe fittings. Through the mechanical linkage between the bonding component 11 and the external detector 12, it is ensured that when pipe fittings with different diameters and curvatures are detected, the external detector 12 and the pipe wall always maintain a constant standard detection distance, without the need for manual calibration, which effectively improves the detection accuracy and efficiency.

[0070] The function of the support frame 7 is to fix it on the top of the first clamping assembly 3, providing a stable mounting base for the rotating shaft 8 and the first rotating plate 9, ensuring that the position of the entire detection assembly 6 is stable and will not shift with the rotation or movement of the pipe. The function of the rotating shaft 8 is to provide rotational support for the first rotating plate 9, so that the first rotating plate 9 can rotate freely around the rotating shaft 8, thereby adapting to pipes of different diameters and realizing the adaptive adjustment of the fitting assembly 11.

[0071] The function of the first rotating plate 9 is to connect the first connecting plate 10 and the second connecting plate 13, converting the vertical displacement of the bonding component 11 into the rotation of the second connecting plate 13, thereby driving the external detector 12 to adjust its position synchronously. The function of the first connecting plate 10 is to connect the first rotating plate 9 and the bonding component 11, so that the bonding component 11 can rotate synchronously with the first rotating plate 9, while allowing the bonding component 11 to rotate itself to adapt to the curvature change of the pipe surface. The function of the external detector 12 is to emit detection signals and receive reflected signals, and to determine whether there are cracks on the outer surface of the pipe by analyzing the signal changes. It is the core component for crack detection.

[0072] The function of the second connecting plate 13 on the side of the first rotating plate 9 is to transmit the rotation of the first rotating plate 9 to the first rotating rod 14, realizing the reversal and transmission of power. The function of the first rotating rod 14 is to connect the second connecting plate 13 and the second rotating rod 15, converting the up-and-down swing of the second connecting plate 13 into the rotation of the second rotating rod 15. The function of the second rotating rod 15 is to drive the external detector 12 to move radially through its own rotation, adjusting the distance between the external detector 12 and the pipe wall. The first fixed frame 16 serves as the fulcrum of the second rotating rod 15, forming a lever structure to ensure that the small rotation of the first rotating plate 9 can be converted into the precise displacement of the external detector 12, so that the detection spacing is always kept within the standard range.

[0073] The function of the first fixing frame 16 is to fix it to the side of the first clamping assembly 3, provide a rotation fulcrum for the second rotating rod 15, and ensure the stable operation of the lever structure. The function of the first spring 17 on the rotating shaft 8 is to provide a downward preload for the first rotating plate 9, so that the fitting assembly 11 is always in close contact with the top surface of the pipe and will not detach due to local unevenness or vibration of the pipe surface, thus ensuring the stable operation of the linkage mechanism.

[0074] Then, refer to Figure 6 and Figure 7 In this embodiment, the bonding component 11 is used to adaptively bond to the top surface of pipes with different diameters and curvatures. At the same time, it drives the external detector 12 to adjust the detection spacing through mechanical linkage. It is a key component for realizing adaptive detection of variable diameter. The mounting frame 18 provides a mounting base for the first sleeve 19, the first sleeve rod 20, the clamping plate 21 and the first drive roller 23. It is also rotatably connected to the first connecting plate 10, so that the entire bonding component 11 can rotate freely with the curvature of the pipe surface, ensuring that the first drive roller 23 is always perpendicularly bonded to the pipe surface.

[0075] The function of the first sleeve 19 is to provide installation space for the first sleeve rod 20 and the second spring 22, restrict the sliding direction of the first sleeve rod 20, and ensure that the first sleeve rods 20 on both sides can slide synchronously towards or in opposite directions. The function of the first sleeve rod 20 is to connect the clamping plate 21 and the second spring 22, and transmit the elastic force of the second spring 22 to the clamping plate 21 to realize the adaptive clamping of the clamping plate 21 on both sides of the pipe fitting.

[0076] The function of clamping plate 21 is to clamp the top of the pipe from both sides, ensuring that the fitting assembly 11 can be stably attached to the surface of the pipe without lateral displacement, and to accommodate pipes of different diameters. The function of second spring 22 is to provide opposing elastic forces to first sleeve rod 20 and clamping plate 21, so that clamping plate 21 can automatically clamp pipes of different diameters, ensuring that the clamping force is uniform and moderate and will not damage the surface of the pipe. The function of first drive roller 23 is to directly attach to the top surface of the pipe and rotate with the rotation of the pipe, while converting the change in pipe diameter into the vertical displacement of mounting frame 18, thereby driving the first rotating plate 9 to rotate and realize the synchronous adjustment of external detector 12.

[0077] Secondly, see Figure 1 , Figure 4 and Figure 5 In this embodiment, the first clamping component 3 is used to adaptively clamp and fix the irregular pipe fitting from both the top and bottom directions, ensuring that the pipe fitting will not shake or shift during rotation and inspection. It can also adapt to irregular pipe fittings of different diameters and shapes. The upper and lower sets of mounting blocks 24 provide mounting bases for the upper and lower clamping structures respectively. The bottom mounting block 24 is fixed on the mounting plate 2, and the top mounting block 24 is connected to the bottom mounting block 24 through the sleeve frame 33 and the sleeve plate 34, which can adjust the height to adapt to pipe fittings of different diameters.

[0078] The function of the first slide groove 25 is to provide sliding guidance for the first slider 26, restricting the first slider 26 to slide only in opposite directions along the length of the slide groove, ensuring that the first bending plates 28 on both sides can move synchronously. The function of the first slider 26 is to connect the return spring 27 and the first bending plate 28, and to transmit the elastic force of the return spring 27 to the first bending plate 28, so as to realize the adaptive fitting of the first bending plate 28. The function of the return spring 27 is to provide the first slider 26 with the opposite elastic force, so that the first bending plates 28 on both sides can automatically clamp pipes of different diameters, ensuring that the clamping force is evenly distributed on both sides of the pipe.

[0079] The function of the first bending plate 28 is to directly contact the surface of the pipe fitting and clamp the pipe fitting from both sides. The arc-shaped structure of the bending plate can adapt to the surface of the pipe fitting with different curvatures, increase the contact area, and improve the stability of clamping. The function of the first mounting groove 29 is to provide mounting space for the second drive roller 30, so that the second drive roller 30 can be embedded in the interior of the first bending plate 28 and contact the surface of the pipe fitting. The function of the second drive roller 30 is to contact the surface of the pipe fitting, convert the sliding friction of the pipe fitting into rolling friction, reduce the resistance when the pipe fitting rotates, and ensure that the pipe fitting can rotate smoothly.

[0080] The bottom frame 31 is fixed to the side of the bottom mounting block 24, providing rotational support for the sleeve frame 33. The sleeve frame 33 is rotatably connected to the bottom frame 31 via the hinge 32, allowing it to rotate around the hinge 32. It also provides sliding space for the sleeve plate 34, enabling adjustment of the height of the top mounting block 24. The sleeve plate 34 is slidably disposed within the sleeve frame 33, with its top fixedly connected to the top mounting block 24. The height of the top mounting block 24 is adjusted by sliding within the sleeve frame 33 to accommodate pipes of different diameters. The limiting groove 35 is formed on the side of the bottom frame 31 and the sleeve plate 34, cooperating with the side of the first bent plate 28 to limit the maximum opening angle of the first bent plate 28, preventing the first bent plate 28 from sliding excessively out of the first sliding groove 25, while ensuring that the first bent plate 28 maintains the correct position during clamping.

[0081] See again Figure 1 , Figure 6 and Figure 9 In this embodiment, the function of the rotating component 4 is to drive the pipe to rotate at a constant speed around its own axis, so that the external detector 12 can detect the entire circumferential surface of the pipe. At the same time, it adaptively fits the surface of pipes with different shapes to ensure the stability of the pipe rotation process. The function of the second slide groove 36 is to provide sliding guidance for the second slider 37, restricting the second slider 37 to move only in the vertical direction, so that the rotating component 4 can automatically detach from or fit onto the pipe with the action of the conveying component 5. The function of the second slider 37 is to provide the mounting base for the first rotating column 39, the first bonding plate 40 and the first rotating roller 42, and drive the entire rotating component 4 to move up and down.

[0082] The function of the rotating groove 38 is to provide rotation space for the first rotating column 39, so that the first rotating column 39 can rotate around its own axis, thereby driving the first bonding plate 40 to rotate and adapt to different angles on the surface of the pipe fitting. The function of the first rotating column 39 is to provide mounting support for the first bonding plate 40 and the third spring 41, so that the first bonding plate 40 can rotate around the first rotating column 39 and adapt to the curvature changes of the surface of the pipe fitting. The function of the first bonding plate 40 is to provide a mounting base for the first rotating roller 42 and the first motor 44, and at the same time, under the action of the third spring 41, it is in close contact with the bottom surface of the pipe fitting, ensuring that there is sufficient friction between the first rotating roller 42 and the pipe fitting, so as to drive the pipe fitting to rotate smoothly.

[0083] The function of the third spring 41 is to provide an upward preload to the first bonding plate 40, so that the first bonding plate 40 is always in close contact with the bottom surface of the pipe, adapting to the ovality and local unevenness of the pipe surface, and ensuring the stability of the drive. The function of the first rotating roller 42 is to contact the bottom surface of the pipe and rotate under the drive of the first motor 44, driving the pipe to rotate around its own axis through friction. The function of the first protective cover 43 is to cover the first motor 44 to prevent dust, oil and other contaminants from entering the motor, protecting the motor from damage, and ensuring the safety of the operator. The function of the first motor 44 is to provide driving power to the first rotating roller 42, driving the first rotating roller 42 to rotate at a uniform speed, thereby driving the pipe to rotate smoothly.

[0084] In addition, see Figure 1 , Figure 8 , Figure 10 , Figure 12 and Figure 13 In this embodiment, the function of the conveying component 5 is to realize the automatic axial conveying of the pipe fitting, so that the detection component 6 can detect different axial positions of the pipe fitting and complete the continuous detection of long-distance pipe fitting. At the same time, it is linked with the rotating component 4 to automatically disengage the rotating component 4 from the pipe fitting during conveying to avoid interference. The function of the horizontal plate 45 is to be fixed on the side of the mounting plate 2 to provide a mounting base for the third slide 46, the bidirectional lead screw 50 and the second motor 51. The function of the third slide 46 is to provide a sliding guide for the third slider 47, restricting the third slider 47 to slide only in opposite directions along the length of the slide 46, so as to ensure that the clamping frames 49 on both sides can move synchronously.

[0085] The function of the third slider 47 is to connect the sliding frame 48 and the double-acting screw 50, converting the rotation of the double-acting screw 50 into the linear movement of the sliding frame 48. The function of the sliding frame 48 is to connect the third slider 47 and the clamping frame 49, driving the clamping frame 49 to move synchronously. The function of the clamping frame 49 is to provide an installation base for the anti-slip plate 54, the limiting post 56 and the threaded handle 57, and to cooperate with the anti-slip plate 54 to clamp the two sides of the pipe fitting. The function of the double-acting screw 50 is to drive the third sliders 47 on both sides to move synchronously in opposite directions through its own rotation, so as to realize the clamping and releasing action of the clamping frame 49. The function of the second motor 51 is to provide driving power for the double-acting screw 50, driving the double-acting screw 50 to rotate in both directions, so as to realize the automatic clamping and releasing of the clamping frame 49. The function of the first pulley 52 and the first transmission belt 53 is to transmit the power of the second motor 51 to the double-acting screw 50, so as to realize the transmission of power and deceleration.

[0086] The anti-slip plate 54 directly contacts the side of the pipe fitting to clamp it. The anti-slip points 55 on its surface increase friction and prevent the pipe fitting from sliding during transport. The anti-slip points 55 further increase the friction between the anti-slip plate 54 and the pipe fitting, improving the reliability of clamping. The limiting post 56 provides a sliding guide for the anti-slip plate 54, restricting its movement to the horizontal direction and ensuring that the anti-slip plate 54 can smoothly clamp and release the pipe fitting. The threaded handle 57 rotates to drive the anti-slip plate 54 to slide along the limiting post 56, allowing manual adjustment of the clamping force of the anti-slip plate 54 to accommodate pipe fittings of different diameters and ensure a firm clamping.

[0087] The function of the moving rod 58 is to connect the clamping frame 49 and the second rod 59, and to drive the second rod 59 to move synchronously with the clamping frame 49. The function of the second rod 59 is to connect the moving rod 58 and the third rotating rod 65, and to convert the axial movement of the clamping frame 49 into the rotation of the third rotating rod 65. The function of the second sleeve 60 is to provide sliding guidance for the second rod 59, and to fix the support plate 61 and the rack 62, so as to ensure that the rack 62 can stably mesh with the gear 64. The function of the support plate 61 is to connect the second sleeve 60 and the rack 62, and to convert the rotation of the gear 64 into the axial movement of the second sleeve 60, thereby driving the clamping frame 49 to move axially.

[0088] The rack 62 meshes with the gear 64, converting the rotational motion of the gear 64 into its own linear motion, thereby achieving axial transport of the clamping frame 49. The third motor 63 provides driving power to the gear 64, causing the gear 64 to rotate in both directions, thereby achieving forward and backward movement of the clamping frame 49. The gear 64 meshes with the rack 62, converting the rotational power of the third motor 63 into the linear power of the rack 62, thereby driving the clamping frame 49 to move axially.

[0089] The function of the third rotating rod 65 is to connect the second sleeve rod 59 and the fourth rotating rod 67, converting the axial movement of the second sleeve rod 59 into the rotation of the fourth rotating rod 67. The function of the base 66 is to connect the second sliders 37 on both sides, driving the second sliders 37 to move up and down synchronously. The function of the fourth rotating rod 67 is to connect the third rotating rod 65 and the base 66, forming a lever structure with the vertical frame 68 as the fulcrum, converting the rotation of the third rotating rod 65 into the up and down movement of the base 66, thereby driving the rotating component 4 to move up and down, realizing the automatic disengagement and engagement of the rotating component 4 with the pipe. The function of the vertical frame 68 is to be fixed at the bottom of the base frame 1, providing a rotation fulcrum for the fourth rotating rod 67, ensuring the stable operation of the lever structure.

[0090] In addition, see Figure 3 , Figure 4 , Figure 6 and Figure 14 In this embodiment, the internal detection section is used to automatically detect cracks on the inner surface of irregularly shaped pipe fittings. It works in conjunction with the external detector 12 to simultaneously detect the inner and outer surfaces of the pipe fittings, eliminating the need for two separate processes and significantly improving detection efficiency. The winding spool 69 is used to wind the guide wire 70. It automatically winds and unwinds the guide wire 70 when the internal detector 71 moves, preventing the guide wire 70 from getting tangled or knotted. The guide wire 70 connects the internal detector 71 and the winding spool 69, providing the internal detector 71 with power and signal transmission channels. It can also pull the internal detector 71 out of the pipe fitting if it malfunctions. The internal detector 71 is used to emit detection signals and receive reflected signals to detect cracks on the inner surface of the pipe fittings. It is the core component for realizing internal detection.

[0091] The function of the second fixed frame 72 is to provide an installation base for the second rotating roller 73, the fourth motor 74 and the third fixed frame 76, and to ensure the stability of the position of each component. The function of the second rotating roller 73 is to fit against the inner wall of the pipe and rotate under the drive of the fourth motor 74, thereby driving the internal detector 71 to move along the axial direction of the pipe. The function of the fourth motor 74 is to provide driving power for the second rotating roller 73, drive the second rotating roller 73 to rotate, and realize the autonomous movement of the internal detector 71.

[0092] The function of the second transmission belt 75 is to transmit the power of the fourth motor 74 to the second rotating roller 73 to realize the power transmission. The function of the third fixing frame 76 is to provide an installation base for the magnet 77, ensuring that the magnet 77 can be stably attracted to the inner wall of the pipe. The function of the magnet 77 is to generate magnetic force, so that the internal detector 71 can be attracted to the inner wall of the pipe. It ensures that there is sufficient friction between the second rotating roller 73 and the pipe wall, so as to drive the internal detector 71 to move smoothly, while adapting to pipes of different diameters.

[0093] Finally, see Figure 1In this embodiment, the base frame 1 serves as the main support for the entire testing device, bearing the weight of all components and ensuring that the device is stable and reliable during operation, without shaking or tipping over. The mounting plate 2 is detachably mounted on the top of the base frame 1, providing a unified mounting platform for the first clamping assembly 3, the rotating assembly 4, and the conveying assembly 5, facilitating the assembly and disassembly of the device. At the same time, different specifications of mounting plates 2 can be replaced according to different testing requirements to adapt to a wider range of pipe sizes.

[0094] Working principle

[0095] The detection device and method for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings are as follows: First, the pipe fitting to be tested is placed on the bottom first bent plate 28. The reset spring 27 pushes the first slider 26 to drive the first bent plates 28 on both sides to clamp the bottom of the pipe fitting. The second drive roller 30 is in contact with the pipe wall. The sleeve frame 33 is rotated to adjust the height of the sleeve plate 34 so that the top first bent plate 28 is in contact with the top of the pipe fitting, thus completing the clamping and fixing. At this time, the first drive roller 23 is in close contact with the top of the pipe fitting under the action of the first spring 17. The second spring 22 pushes the clamping plate 21 to clamp the two sides of the pipe fitting. The first rotating plate 9 drives the external detector 12 to automatically adjust to the standard detection spacing through the linkage mechanism. The internal detector 71 is placed into the pipe fitting, the magnet 77 is attracted to the inner wall, and the second rotating roller 73 is in contact with the pipe wall.

[0096] The first motor 44 is started to drive the first rotating roller 42 to rotate, driving the pipe to rotate at a constant speed. The external detector 12 begins to detect the outer surface. At the same time, the fourth motor 74 is started to drive the second rotating roller 73 to rotate, driving the internal detector 71 to move axially to detect the inner surface. After detecting a section, the second motor 51 is started to drive the bidirectional lead screw 50 to rotate, so that the clamping frame 49 clamps the pipe. The threaded handle 57 is tightened to fix it. The third motor 63 is started to drive the gear 64 and rack 62 to drive the clamping frame 49 and the pipe to move axially. At the same time, the bottom support 66 and the second slider 37 are driven to move down through the linkage mechanism, so that the rotating component 4 is disengaged from the pipe. After moving to the new area, the third motor 63 reverses, and the rotating component 4 returns to its original position and fits the pipe. The detection continues. The above steps are repeated until the crack detection of the inner and outer surfaces of the entire pipe is completed.

[0097] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detection device for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings, characterized in that, include: Base frame (1); Mounting plate (2), which is detachably mounted on the top of the base frame (1); The first clamping assembly (3) is mounted on both sides of the top of the mounting plate (2); Rotating assembly (4), the rotating assembly (4) is mounted on both sides of the top of the mounting plate (2); A conveying assembly (5) is mounted on the side of the mounting plate (2); A detection component (6) is mounted on top of the first clamping component (3) on one side; The detection component (6) includes a support frame (7), which is fixedly mounted on the top of the first clamping component (3). A rotating shaft (8) is rotatably mounted on the support frame (7). A first rotating plate (9) is rotatably mounted on the side of the rotating shaft (8). A first connecting plate (10) is fixedly mounted on one side of the first rotating plate (9). A fitting component (11) is rotatably mounted on the side of the first connecting plate (10). The fitting component (11) fits into the pipe fitting. An external detector (12) is mounted on the side of the first clamping component (3). A second connecting plate (13) is fixedly provided on the side of the first rotating plate (9), a first rotating rod (14) is rotatably provided on the bottom of the second connecting plate (13), a second rotating rod (15) is rotatably provided on the side of the first rotating rod (14), the second rotating rod (15) is rotatably provided with the external detector (12), a first fixing frame (16) is fixedly provided on the side of the first clamping assembly (3), the first fixing frame (16) is rotatably provided with the center of the second rotating rod (15), a first spring (17) is sleeved on the rotating shaft (8), and the first spring (17) is fixedly provided with the first rotating plate (9); The rotating assembly (4) includes a second slide groove (36), in which a second slider (37) is slidably disposed, and rotating grooves (38) are provided on both sides of the top of the second slider (37). A first rotating column (39) is rotatably disposed in the rotating groove (38), and a first bonding plate (40) is rotatably disposed on the first rotating column (39). The conveying assembly (5) includes a clamping frame (49), a movable rod (58) is fixedly provided at the bottom of the clamping frame (49), a second sleeve rod (59) is fixedly provided on the side of the movable rod (58), a third rotating rod (65) is rotatably provided at the bottom of the second sleeve rod (59), a base support (66) is fixedly provided between the bottoms of the second slider (37), a fourth rotating rod (67) is rotatably provided at the bottom of the base support (66), the fourth rotating rod (67) and the third rotating rod (65) are rotatably provided, and the bottom of the base frame (1) A vertical frame (68) is fixedly installed on the base, and the vertical frame (68) is rotatably installed at the center of the fourth rotating rod (67). A second sleeve (60) is slidably installed between the second sleeve rod (59). A support plate (61) is fixedly installed on the side of the second sleeve (60). A rack (62) is fixedly installed on the top of the support plate (61). A third motor (63) is fixedly installed at the bottom of the base frame (1). A gear (64) is connected to the output shaft of the third motor (63) by a key. The gear (64) meshes with the rack (62). On the other side, the first clamping assembly (3) is provided with a winding spool (69) on top, a guide wire (70) is wound on the winding spool (69), an internal detector (71) is fixedly provided at the bottom of the guide wire (70), a second fixing frame (72) is fixedly provided at the top of the internal detector (71), a second rotating roller (73) is rotatably provided on the second fixing frame (72), a fourth motor (74) is fixedly provided at the bottom of the second fixing frame (72), a second transmission belt (75) is provided between the fourth motor (74) and the second rotating roller (73), a third fixing frame (76) is fixedly provided on both sides of the second fixing frame (72), a magnet (77) is fixedly provided at the top of the third fixing frame (76), and the magnet (77) is adapted to the interior of the pipe.

2. The detection device for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings according to claim 1, characterized in that, The first clamping assembly (3) includes two sets of mounting blocks (24), one at the bottom and one at the top. The mounting block (24) at the bottom is detachably mounted on both sides of the top of the mounting plate (2). The top of each set of mounting blocks (24) is provided with a first sliding groove (25). The two sides of the first sliding groove (25) are provided with first sliders (26) that slide towards each other. A return spring (27) is fixedly mounted in the first sliding groove (25). The return spring (27) is fixedly mounted with the first slider (26). The top of the first slider (26) is fixedly mounted with a first bent plate (28). The bottom and sides of the first bent plate (28) are provided with first mounting grooves (29). The inner rotating part is provided with a second drive roller (30), and the side of the mounting block (24) at the bottom is fixedly provided with a bottom frame (31). The top of the bottom frame (31) is rotatably provided with a sleeve frame (33) via a hinge (32). A sleeve plate (34) is slidably provided inside the sleeve frame (33). The side of the sleeve plate (34) is fixedly provided with the mounting block (24) at the top. The side of the bottom frame (31) and the side of the sleeve plate (34) are both provided with a limiting groove (35) that is compatible with the first bent plate (28). The support frame (7) is fixedly provided with the mounting block (24) at the bottom. The first fixing frame (16) is fixedly provided with the side of the mounting block (24) at the top.

3. The detection device for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings according to claim 2, characterized in that, A third spring (41) is sleeved on the first rotating column (39). The third spring (41) is fixedly set with the first bonding plate (40). A first rotating roller (42) is rotatably set on the side of the first bonding plate (40). The first rotating roller (42) is in contact with the side of the pipe. A first protective cover (43) is fixedly set on the side of the first bonding plate (40). A first motor (44) is fixedly set inside the first protective cover (43). The output shaft of the first motor (44) is connected to the first rotating roller (42) by a key.

4. The detection device for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings according to claim 3, characterized in that, The conveying assembly (5) also includes a horizontal plate (45), on which a third slide groove (46) is provided. A third slider (47) is slidably arranged on both sides of the third slide groove (46). A sliding frame (48) is fixedly arranged on the top of the third slider (47). The side of the sliding frame (48) is fixedly arranged with the clamping frame (49). A bidirectional lead screw (50) is rotatably arranged in the third slide groove (46). The bidirectional lead screw (50) and the third slider (47) are connected by threads. A second motor (51) is fixedly arranged at the bottom of the horizontal plate (45). A first pulley (52) is fixedly arranged at the center of the output shaft of the second motor (51) and the center of the bidirectional lead screw (50). A first transmission belt (53) is arranged between the first pulleys (52).

5. The detection device for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings according to claim 4, characterized in that, An anti-slip plate (54) is slidably disposed on the clamping frame (49). Several anti-slip points (55) are fixedly disposed on the anti-slip plate (54). Limiting posts (56) are fixedly disposed on both sides of the anti-slip plate (54). The limiting posts (56) are slidably disposed with the clamping frame (49). The limiting post (56) located at the bottom is slidably disposed with the sliding frame (48). A threaded handle (57) is provided on the side of the clamping frame (49) by means of threads. The threaded handle (57) is rotatably disposed with the anti-slip plate (54).

6. The detection device for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings according to claim 5, characterized in that, The bonding component (11) includes a mounting frame (18), which is rotatably disposed on the side of the first connecting plate (10). A first sleeve (19) is fixedly disposed on the mounting frame (18). A first sleeve rod (20) is slidably disposed on both sides of the first sleeve (19). A clamping plate (21) is fixedly disposed on the side of the first sleeve rod (20). The clamping plate (21) is in contact with both sides of the pipe fitting. A second spring (22) is fixedly disposed inside the first sleeve (19). The second spring (22) is fixedly disposed with the first sleeve rod (20). A first drive roller (23) is rotatably disposed at the bottom of the mounting frame (18). The first drive roller (23) is in contact with the top of the pipe fitting.

7. The detection method of the detection device for detecting cracks on the inner and outer surfaces of irregularly shaped pipe fittings according to claim 6, characterized in that, Includes the following steps: S1: First, fix the pipe and place it on the first bent plate (28) at the bottom. The first bent plate (28) at the bottom cooperates with the return spring (27) and the second drive roller (30) to keep the first bent plate (28) at the bottom in contact with the bottom of the pipe. Then rotate the sleeve (33) and adjust the position of the sleeve (34) so ​​that the first bent plate (28) at the top is always in contact with the top of the pipe to fix the pipe. S2: Then rotate the pipe, and the first bonding plate (40) at the bottom cooperates with the third spring (41) and the first rotating roller (42) to make the first bonding plate (40) stick to the bottom of the pipe, drive the first motor (44), and the first motor (44) drives the first rotating roller (42) to rotate, so that the pipe rotates. S3: To inspect the pipeline, first place the mounting frame (18) on the top of the pipeline, so that the first drive roller (23) is in contact with the top of the pipeline. At this time, under the drive of the second spring (22), the clamp (21) is in contact with the top sides of the pipeline in conjunction with the first sleeve rod (20). When the first drive roller (23) is in contact with the top of the pipeline, the first rotating plate (9) is driven to rotate through the first connecting plate (10). The rotation of the first rotating plate (9) drives the second connecting plate (13) to rotate. The rotation of the second connecting plate (13) drives the first rotating rod (14) to rotate. The rotation of the first rotating rod (14) drives the second rotating rod (15) to rotate. The rotation of the second rotating rod (15) drives the external detector (12) to move through the first fixed frame (16), so that the distance between the external detector (12) and the pipeline meets the inspection standard. Then, the internal detector (71) is fixed inside the pipeline by the magnet (77). The fourth motor (74) is started to drive the second rotating roller (73) to drive the internal detector (71) to move and inspect the inside of the pipeline. S4: After inspecting a section of the pipe, move the pipe so that the external detector (12) and the internal detector (71) can inspect the new area. First, start the second motor (51). The second motor (51) drives the double-acting screw (50) to rotate. The double-acting screw (50) drives the clamping frame (49) to move and clamp the two sides of the pipe. Then start the third motor (63). The third motor (63) works with the moving rod (58) to drive the clamping frame (49) to move. While the moving rod (58) moves, it works with the second rod (59) to drive the third rotating rod (65) to rotate. The third rotating rod (65) rotates and works with the fourth rotating rod (67) to drive the base (66) to move. The base (66) moves and drives the second slider (37) to move, so that the rotating component (4) falls off the pipe. S5: After moving the pipeline to the new area to be inspected, repeat the above steps to inspect different locations of the pipeline.

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