An apparatus for crack inner detection and a method for detecting cracks in the inner wall of a pipe

Abstract

The application discloses a kind of crack inner detection equipment and for pipeline inner wall crack detection method, it is related to crack detection technical field, including: bottom plate, characterized in that: the moving plate is slidably arranged above bottom plate, two fixed platforms are symmetrically arranged on the top of bottom plate, and a second drive assembly for driving the movement of the two fixed platforms is arranged on the top of bottom plate;Multiple pipelines to be detected are placed on the moving plate, multiple positioning assemblies are arranged on the moving plate, and the positioning assemblies are used to position the pipelines to the specified position;Multiple clamping assemblies are arranged on the moving plate, and the clamping assemblies are used to clamp the corresponding pipelines;The top of the two fixed platforms is commonly provided with a track assembly: solve the problem that trolley in the prior art drives in the inner wall of pipeline, it can be caused by the unevenness, dirt or foreign matter of inner wall of pipeline and other factors to cause unstable driving, detection operation cannot be continuously carried out, leading to the problem of reducing overall detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of crack detection technology, and in particular to a crack detection device and a method for detecting cracks in the inner wall of pipes. Background Technology

[0002] Crack detection equipment is a specialized tool used to detect and evaluate internal cracks in materials. These devices typically feature high precision and non-destructive operation, enabling the detection and analysis of defects such as cracks without damaging the material structure.

[0003] In the existing technological system, pipeline crack detection is carried out using pipeline inspection robot technology. This technology involves deploying a specialized robot to enter the pipeline to perform inspection operations. The robot is equipped with a high-definition camera system, which captures high-definition images of the pipeline's inner wall under sufficient lighting conditions. These image data are then transmitted in real time to the display screen of an external control device via wireless or wired communication. Operators observe and analyze the images of the pipeline's inner wall displayed on the screen to identify and locate potential crack defects. After completing the inspection of one pipeline, the operator performs a trolley retrieval process and then redeploys the robot to another pipeline to be inspected to continue the crack detection operation.

[0004] The shortcomings of the existing technology are: when the trolley travels on the inner wall of the pipe, the unevenness, dirt or foreign objects on the inner wall of the pipe may cause the trolley to be unstable, which will affect the accuracy and reliability of the detection; due to the existence of the recycling and redeployment process, the detection operation cannot be carried out continuously, resulting in a reduction in the overall detection efficiency.

[0005] Therefore, this application provides a crack detection device and a method for detecting cracks in the inner wall of pipes to meet the requirements. Summary of the Invention

[0006] The purpose of this application is to provide a crack detection device and a method for detecting cracks in the inner wall of pipes, which solves the problem in the prior art that when a trolley travels on the inner wall of a pipe, the unevenness, dirt or foreign objects on the inner wall of the pipe may cause unstable driving and the inability to carry out continuous detection operations, resulting in a reduction in overall detection efficiency.

[0007] To address the aforementioned problems, this application provides the following technical solution: a crack detection device, comprising: a base plate, characterized in that: a movable plate is slidably disposed above the base plate, two fixed platforms are symmetrically disposed on the top of the base plate, and a second driving component for driving the two fixed platforms to move is disposed on the top of the base plate; multiple pipes to be detected are placed on the movable plate, and multiple positioning components are disposed on the movable plate for positioning the pipes to a designated position; multiple clamping components are disposed on the movable plate for clamping the corresponding pipes;

[0008] The tops of the two fixed platforms are jointly equipped with a track assembly, which includes an arc segment, a termination segment, a starting segment, and a U-shaped segment. The arc segment and termination segment are fixedly installed on the top of one of the fixed platforms, while the starting segment and U-shaped segment are fixedly installed on the top of the other fixed platform. Parts of the structure of the starting segment and U-shaped segment are suspended in the air. A pipeline inspection trolley is installed on the track assembly. When the starting segment, arc segment, U-shaped segment, and termination segment form a complete track assembly in sequence, the pipeline inspection trolley enters the interior of one of the pipelines from the starting segment and sequentially performs crack detection on the interiors of multiple pipelines along the trajectory of the track assembly.

[0009] Preferably, a first driving assembly for driving the moving plate is provided above the base plate. The first driving assembly includes two first vertical plates symmetrically fixedly connected to the top of the base plate, a first guide rod fixedly connected between the two first vertical plates, a first lead screw rotatably connected between the two first vertical plates, and a horizontal plate fixedly connected between the two first vertical plates. The horizontal plate is located below the first guide rod and the first lead screw. A moving seat is fixedly connected to the bottom of the moving plate. The bottom of the moving seat is slidably connected to the horizontal plate. The moving seat has a threaded hole adapted to the first lead screw and a cylindrical hole adapted to the first guide rod. The threaded hole and the cylindrical hole communicate with the outside of the moving plate. The threaded hole of the moving seat is threadedly connected to the first lead screw. The first guide rod passes through the cylindrical hole of the moving seat. A first motor is fixedly connected to the side of one of the first vertical plates. The output end of the first motor passes through the corresponding first vertical plate and is fixedly connected to one end of the first lead screw.

[0010] Preferably, the positioning component includes multiple limiting plates arranged linearly, and the top of the limiting plates has an arc-shaped opening adapted to the pipeline.

[0011] Preferably, a transmission assembly is provided above the base plate. When the moving plate moves towards the fixed platform, the first drive assembly and the transmission assembly cooperate to enable the clamping assembly to operate and clamp the corresponding pipe. The clamping assembly includes two second fixed plates symmetrically fixedly connected to the top of the moving plate. A double-ended lead screw is rotatably connected between the two second fixed plates. The two ends of the outer surface of the double-ended lead screw are respectively provided with threads of opposite directions. Two arc-shaped clamping plates are symmetrically threaded on the double-ended lead screw. The arc-shaped clamping plates are adapted to the pipe. The top of the moving plate is provided with multiple first sliding grooves. The bottom of the two arc-shaped clamping plates is slidably connected to the inner side of the corresponding first sliding groove. One of the double-ended lead screws... One end of the transmission assembly passes through one of the second fixed plates and is fixedly connected to a driven bevel gear. The transmission assembly includes two symmetrically arranged transmission racks, both of which are fixedly arranged between two first vertical plates. The transmission assembly also includes multiple fixed shafts rotatably arranged above a movable plate. Two first fixed plates are arranged on the outer side of the fixed shafts. The bottom of the first fixed plates is fixedly connected to the movable plate. One end of the fixed shaft is rotatably connected to one of the first fixed plates, and the other end of the fixed shaft passes through the other first fixed plate. A driving bevel gear and a transmission gear are fixedly sleeved on the fixed shaft. The driving bevel gear meshes with the corresponding driven bevel gear, and the transmission gear meshes with the corresponding transmission rack.

[0012] Preferably, the second drive assembly includes two second vertical plates symmetrically fixedly connected to the top of the base plate, a double-ended screw rotatably connected between the two second vertical plates, the two ends of the outer surface of the double-ended screw being respectively provided with threads of opposite directions, a second guide rod fixedly connected between the two second vertical plates, two connecting plates fixedly connected to the bottom of the fixed platform, the double-ended screw being threadedly connected to the connecting plates, and both the double-ended screw and the second guide rod penetrating through the connecting plates, a second motor being fixedly installed on the side of one of the second vertical plates, the output end of the second motor penetrating through the corresponding second vertical plate and fixedly connected to one end of the double-ended screw.

[0013] Preferably, multiple bearing plates are fixedly connected to the sides of the fixed platform corresponding to the arc segment and the termination segment, and the multiple bearing plates are respectively set at the ends of the arc segment and the termination segment.

[0014] Preferably, the top of the movable plate is provided with a marking component, which includes multiple threaded rods, each corresponding to a pipe. A third fixing plate is provided on both sides of each threaded rod, with the bottom of the third fixing plate fixed to the movable plate. A drive motor is fixed to the side of one of the third fixing plates, passing through the corresponding third fixing plate and fixedly connected to one end of the corresponding threaded rod. The other end of the threaded rod is rotatably connected to the side of another third fixing plate. A slider is threaded onto the threaded rod, passing through the corresponding threaded rod. The top of the movable plate has multiple second sliding grooves, each corresponding to a slider. The bottom of the slider is slidably connected to the corresponding second sliding groove. A movable plate is slidably connected inside the slider, passing through the slider. A marking pen is fixedly connected to the side of the movable plate near the corresponding pipe. A fixed column is fixedly connected to the bottom of the movable plate. The top of the movable plate has multiple guide grooves.

[0015] Preferably, the guide groove and the fixed column are provided in a one-to-one correspondence. The bottom of the fixed column is slidably connected in the corresponding guide groove. The guide groove includes two far-away sections and a near-away section. The near-away section is located between the two far-away sections, and the far-away section and the near-away section are connected by an inclined section.

[0016] The present invention also discloses a method for detecting cracks in the inner wall of a pipeline, which uses the aforementioned crack detection device.

[0017] Compared with the prior art, the present invention provides a crack detection device and a method for detecting cracks in the inner wall of pipes, which has the following beneficial effects:

[0018] 1. In this invention, a track assembly is provided, which consists of an arc segment, an end segment, a start segment, and a U-shaped segment. These parts can be spliced ​​together to form a complete track. The design of the track assembly enables the pipeline inspection trolley to travel on a fixed track instead of directly on the inner wall of the pipeline. Even if there are unevenness, dirt, or foreign objects on the inner wall of the pipeline, the pipeline inspection trolley can maintain a stable driving state because the track provides a smooth and continuous driving path for the trolley.

[0019] 2. In this invention, when two fixed platforms approach each other to a designated position, the starting segment, arc segment, U-shaped segment and ending segment can be seamlessly connected in sequence to form a continuous track that runs through multiple pipes. Due to the continuity and stability of the track assembly, the pipe inspection trolley can continuously inspect multiple pipes along the track without interruption or repositioning. The external control equipment can control the pipe inspection trolley to travel along the track assembly's trajectory and turn on the camera and lighting in real time to transmit the image of the pipe's inner wall to the screen for staff to observe.

[0020] 3. In this invention, when the moving plate moves toward the fixed platform, the first driving component and the transmission component cooperate to realize the linkage between the movement of the moving plate and the clamping action of the clamping component. Once the first motor is started, the entire clamping process can be completed automatically without manual intervention, which improves work efficiency and saves time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure on the movable plate of the present invention;

[0024] Figure 3 For the present invention Figure 2 Partial structural diagram;

[0025] Figure 4 For the present invention Figure 1 Enlarged structural diagram at point A;

[0026] Figure 5 This is a schematic diagram of the bottom structure of the movable plate of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the two fixed platforms of the present invention being close to each other;

[0028] Figure 7 This is a schematic diagram of the structure of the two fixed platforms of the present invention, which are far apart from each other;

[0029] Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B;

[0030] Figure 9 For the present invention Figure 7 Enlarged structural diagram at point C.

[0031] In the diagram: 1. Base plate; 2. Moving plate; 21. Moving seat; 22. Second slide groove; 23. First slide groove; 3. Transmission assembly; 31. Transmission rack; 32. Transmission gear; 33. Fixed shaft; 34. First fixed plate; 35. Driving bevel gear; 36. Driven bevel gear; 4. Clamping assembly; 41. Arc-shaped clamping plate; 42. Double-ended lead screw; 43. Second fixed plate; 5. Marking assembly; 51. Drive motor; 52. Threaded rod; 53. Slider; 54. Movable plate; 55. Third fixed plate; 56. Marking pen; 57. Guide 58. Groove; 6. Fixed column; 7. First drive assembly; 8. First motor; 9. First lead screw; 10. First guide rod; 11. First guide rod; 12. First guide rod; 13. First vertical plate; 14. Horizontal plate; 15. Second drive assembly; 16. Second motor; 17. Double-ended screw; 18. Second guide rod; 19. Second vertical plate; 20. Track assembly; 10. Arc-shaped section; 11. Termination section; 12. Starting section; 13. U-shaped section; 14. Fixed notch; 15. Fixed platform; 16. Connecting plate; 17. Bearing plate; 18. Pipeline inspection trolley; 19. Positioning assembly. Detailed Implementation

[0032] 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.

[0033] Example: Reference Figures 1-9 The crack detection device shown includes: a base plate 1, a movable plate 2 slidably disposed above the base plate 1, a first drive assembly 6 disposed above the base plate 1 for driving the movable plate 2 to run, two fixed platforms 9 symmetrically disposed on the top of the base plate 1, and a second drive assembly 7 disposed on the top of the base plate 1 for driving the two fixed platforms 9 to move. The second drive assembly 7 can make the two fixed platforms 9 move closer to each other or further away from each other.

[0034] The first drive assembly 6 includes two first vertical plates 64 symmetrically fixedly connected to the top of the base plate 1. A first guide rod 63 is fixedly connected between the two first vertical plates 64. A first lead screw 62 is rotatably connected between the two first vertical plates 64. A horizontal plate 65 is fixedly connected between the two first vertical plates 64, and the horizontal plate 65 is located below the first guide rod 63 and the first lead screw 62. A movable seat 21 is fixedly connected to the bottom of the movable plate 2. The bottom of the movable seat 21 is slidably connected to the horizontal plate 65. An adapter for the first lead screw is provided on the movable seat 21. The threaded hole of 62 and the cylindrical hole of the first guide rod 63 are connected to the outside of the movable plate 2. The threaded hole of the movable seat 21 is threadedly connected to the first lead screw 62. The first guide rod 63 passes through the cylindrical hole of the movable seat 21. The first guide rod 63 is used to realize the lateral movement of the movable plate 2 and the movable seat 21. A first motor 61 is fixedly connected to the side of one of the first vertical plates 64. The output end of the first motor 61 passes through the corresponding first vertical plate 64 and is fixedly connected to one end of the first lead screw 62.

[0035] When the movable plate 2 needs to be moved to a position close to the fixed platform 9, the first motor 61 is started. The output end of the first motor 61 drives the first lead screw 62 to rotate, so that the movable seat 21 and the movable plate 2 move laterally under the guidance of the first guide rod 63, so that the movable plate 2 moves to a position close to the fixed platform 9. When the movable plate 2 needs to be moved to a position away from the fixed platform 9, the first motor 61 is started in the opposite direction.

[0036] Multiple pipes to be inspected are placed on the movable plate 2. Multiple positioning components 13 are provided on the movable plate 2. The positioning components 13 include multiple limiting plates, which are arranged linearly. The top of the limiting plates has an arc-shaped opening adapted to the pipe. The positioning components 13 are used to position the pipe to a specified position. When the pipe needs to be inspected, the movable plate 2 is in a position away from the fixed platform 9, and multiple pipes are placed on the corresponding positioning components 13. The side wall of the pipe is attached to the inner wall of the arc-shaped opening of the corresponding limiting plate.

[0037] The movable plate 2 is provided with multiple clamping components 4, which are used to clamp the corresponding pipes. The base plate 1 is provided with a transmission component 3. When the movable plate 2 moves toward the fixed platform 9, the first drive component 6 and the transmission component 3 cooperate to enable the clamping components 4 to run and clamp the corresponding pipes.

[0038] The clamping assembly 4 includes two second fixed plates 43 symmetrically fixedly connected to the top of the movable plate 2. A double-ended lead screw 42 is rotatably connected between the two second fixed plates 43. The two ends of the outer surface of the double-ended lead screw 42 are respectively provided with threads of opposite directions. Two arc-shaped clamping plates 41 are symmetrically threaded onto the double-ended lead screw 42. The arc-shaped clamping plates 41 are adapted to the pipe. The top of the movable plate 2 is provided with multiple first sliding grooves 23. The bottom of the two arc-shaped clamping plates 41 is slidably connected to the inner side of the corresponding first sliding grooves 23. One end of the double-ended lead screw 42 passes through one of the second fixed plates 43 and is fixedly connected to a driven bevel gear 36. The transmission assembly 3 includes two symmetrically arranged transmission... The transmission assembly 3 also includes a plurality of fixed shafts 33 rotatably mounted above the movable plate 2. Two first fixed plates 34 are provided on the outer side of the fixed shafts 33. The bottom of the first fixed plates 34 is fixedly connected to the movable plate 2. One end of the fixed shaft 33 is rotatably connected to one of the first fixed plates 34, and the other end of the fixed shaft 33 passes through the other first fixed plate 34. A driving bevel gear 35 and a transmission gear 32 are fixedly sleeved on the fixed shaft 33. The driving bevel gear 35 is meshed with the corresponding driven bevel gear 36, and the transmission gear 32 is meshed with the corresponding transmission rack 31.

[0039] The first motor 61 is started, and the output end of the first motor 61 drives the first lead screw 62 to rotate, so that the moving seat 21 and the moving plate 2 move as a whole towards the fixed platform 9. The transmission gear 32 moves together with the moving plate 2. The multiple transmission gears 32 on the moving plate 2 move relative to the corresponding transmission racks 31, so that the transmission gears 32 rotate while moving. The transmission gears 32 drive the fixed shaft 33 and the driving bevel gear 35 to rotate. The driving bevel gear 35 drives the driven bevel gear 36 to rotate. The driven bevel gear 36 drives the double-headed lead screw 42 to rotate, so that the two corresponding arc-shaped clamping plates 41 move closer to each other and clamp the corresponding pipes.

[0040] By simply starting the first motor 61, the movement of the moving plate 2 and the clamping action of the clamping component 4 can be linked. Once the first motor 61 is started, the entire clamping process can be completed automatically without manual intervention, which improves work efficiency and saves time.

[0041] The second drive assembly 7 includes two second vertical plates 74 symmetrically fixedly connected to the top of the base plate 1. A double-ended screw 72 is rotatably connected between the two second vertical plates 74. The two ends of the outer surface of the double-ended screw 72 are respectively provided with threads of opposite directions. A second guide rod 73 is fixedly connected between the two second vertical plates 74. Two connecting plates 10 are fixedly connected to the bottom of the fixed platform 9. The double-ended screw 72 is threadedly connected to the connecting plate 10, and both the double-ended screw 72 and the second guide rod 73 pass through the connecting plate 10. The second guide rod 73 is used to realize the linear movement of the connecting plate 10 and the fixed platform 9. A second motor 71 is fixedly installed on the side of one of the second vertical plates 74. The output end of the second motor 71 passes through the corresponding second vertical plate 74 and is fixedly connected to one end of the double-ended screw 72. When the second motor 71 is started, the output end of the second motor 71 drives the double-ended screw 72 to rotate, causing the two fixed platforms 9 to move closer to each other.

[0042] A track assembly 8 is jointly mounted on the top of two fixed platforms 9. The track assembly 8 includes an arc-shaped segment 81, a termination segment 82, a starting segment 83, and a U-shaped segment 84. The arc-shaped segment 81 and the termination segment 82 are fixedly mounted on the top of one of the fixed platforms 9, while the starting segment 83 and the U-shaped segment 84 are fixedly mounted on the top of the other fixed platform 9. Parts of the structure of the starting segment 83 and the U-shaped segment 84 are suspended in the air. A pipe inspection trolley 12 is mounted on the track assembly 8. The pipe inspection trolley 12 is equipped with a camera and a lighting device (not shown in the figure). The camera and the lighting device are electrically connected to an external control device. When the starting segment 83, the arc-shaped segment 81, the U-shaped segment 84, and the termination segment 82... When the complete track assembly 8 is formed in sequence, the pipeline inspection trolley 12 enters the interior of one of the pipelines from the starting section 83 and sequentially performs crack detection on the interior of multiple pipelines along the trajectory of the track assembly 8. When the pipeline inspection trolley 12 travels to the ending section 82, the crack detection work inside the pipeline is completed. When the two fixed platforms 9 move closer to each other to the designated position, the suspended end of the starting section 83 connects with one end of the arc section 81, the other end of the arc section 81 connects with one end of the U-shaped section 84, and the other end of the U-shaped section 84 connects with one end of the ending section 82, thus forming the complete track assembly 8.

[0043] Multiple support plates 11 are fixedly connected to the side of the fixed platform 9 corresponding to the arc segment 81 and the termination segment 82. The multiple support plates 11 are respectively set at the ends of the arc segment 81 and the termination segment 82. The multiple support plates 11 are used to support the suspended ends of the starting segment 83 and the U-shaped segment 84 to prevent the starting segment 83 and the U-shaped segment 84 from deforming. The top of the support plate 11 is provided with a guide groove, which is gradually expanding.

[0044] When the pipe is positioned between and clamped between the two fixed platforms 9, the second motor 71 is activated. The output of the second motor 71 drives the double-headed screw 72 to rotate, causing the two fixed platforms 9 to move closer to each other. During this process, the suspended structures of the initial section 83 and the U-shaped section 84 pass through the corresponding pipes until the ends of the initial section 83 and the U-shaped section 84 enter the corresponding guide grooves. The guide grooves are designed for expansion, ensuring that even when there is a certain mismatch between the ends of the initial section 83 and the U-shaped section 84 and the guide grooves, the ends of the initial section 83 and the U-shaped section 84 can still enter the corresponding guide grooves, improving the ease of assembly. Next, the suspended end of the initial section 83 is joined to one end of the arc-shaped section 81, and the other end of the arc-shaped section 81... The U-shaped section 84 is connected to one end of the U-shaped section 84, and the other end of the U-shaped section 84 is connected to one end of the termination section 82, thus forming a complete track assembly 8. The trolley is placed on the starting section 83, and the external control device controls the trolley to travel along the track assembly 8. The external device turns on the camera and lights. The pipeline inspection trolley 12 enters the interior of one of the pipelines from the starting section 83 and sequentially performs crack detection on the interior of multiple pipelines along the track assembly 8. The camera transmits the image of the inner wall of the pipeline to the screen of the external control device in a bright working environment. The staff observes the image. When the pipeline inspection trolley 12 travels to the termination section 82, the crack detection work inside the pipeline is completed.

[0045] Thanks to the design of the track assembly 8, the pipeline inspection trolley 12 can continuously inspect multiple pipelines without interruption or repositioning. Compared with traditional inspection methods, this method can reduce inspection time and labor intensity.

[0046] To prevent the track assembly 8 from obstructing the inner wall of the pipe, a through fixing notch 85 is provided on the track assembly 8, and a fixing groove (not shown in the figure) is provided on the fixing platform 9. The shape of the fixing groove is the same as that of the fixing notch 85, and the fixing notch 85 is located directly above the fixing groove. Extension rods (not shown in the figure) are fixedly connected to the front, rear, left, and right sides of the pipe inspection trolley 12. The extension rod at the bottom of the pipe inspection trolley 12 passes through the fixing notch 85. The end of the extension rod away from the trolley is connected to a rotatable camera. The rotatable camera is existing technology and will not be described in detail here. When the camera enters the fixing platform 9, the camera is located inside the fixing groove.

[0047] A marking component 5 is provided on the top of the movable plate 2. The marking component 5 is used to mark defective pipes. The marking component 5 includes multiple threaded rods 52, each corresponding to a pipe. A third fixing plate 55 is provided on both sides of each threaded rod 52. The bottom of the third fixing plate 55 is fixed to the movable plate 2. A drive motor 51 is fixed to the side of one of the third fixing plates 55. The drive motor 51 is electrically connected to an external control device. The drive motor 51 passes through the corresponding third fixing plate 55 and is fixedly connected to one end of the corresponding threaded rod 52. The other end of the threaded rod 52 is rotatably connected to the side of another third fixing plate 55. A slider 53 is threaded onto the threaded rod 52, and the slider 53 passes through the corresponding threaded rod 52. Multiple second sliding grooves 22 are provided on the top of the movable plate 2. The groove 22 and the slider 53 are set one-to-one. The bottom of the slider 53 is slidably connected in the corresponding second groove 22 to realize the linear movement of the slider 53. The slider 53 is slidably connected to the inside of the slider 53, and the movable plate 54 passes through the slider 53. The side of the movable plate 54 near the corresponding pipe is fixedly connected to the marker pen 56. The bottom of the movable plate 54 is fixedly connected to the fixed column 58. The top of the movable plate 2 is provided with multiple guide grooves 57. The guide grooves 57 and the fixed columns 58 are set one-to-one. The bottom of the fixed column 58 is slidably connected in the corresponding guide groove 57. The guide groove 57 includes two far-away sections and a near-away section. The near-away section is set between the two far-away sections, and the far-away section and the near-away section are connected by an inclined section. The far-away section refers to the groove section far away from the corresponding pipe, and the near-away section refers to the groove section close to the corresponding pipe.

[0048] When the pipeline inspection trolley 12 enters the inner wall of one of the pipelines, and the staff observes a crack in the pipeline through the screen of the external control device, the corresponding drive motor 51 is activated. The output end of the drive motor 51 drives the corresponding threaded rod 52 to rotate, causing the slider 53 to move along the second slide groove 22. The slider 53 drives the movable plate 54 and the marker pen 56 to move. The fixed column 58 at the bottom of the marker pen 56 runs in the guide groove 57. When the fixed column 58 moves from one of the far-away sections and one of the inclined sections to the near-away section, the pen tip of the marker pen 56 contacts the corresponding pipeline and forms an erasable ink mark on the side of the corresponding pipeline, indicating that there is a defect in the pipeline. Then it moves from another inclined section to another far-away section.

[0049] It is important to note that the suspended ends of the starting section 83 and the U-shaped section 84 cannot be left unsupported for extended periods, otherwise the track may deform. Positioning multiple pipes onto the movable plate 2 requires a certain amount of time. During the pipe positioning process, the starting section 83 and U-shaped section 84 must not be connected to the arc section 81 or the ending section 82, otherwise a collision may occur. Since parts of the starting section 83 and U-shaped section 84 are suspended, a movable plate 2 is used to prevent these parts from remaining unsupported for extended periods. After multiple pipes are positioned, the connection between the starting section 83 and arc section 81, and between the U-shaped section 84 and the ending section 82, is released. Then, the pipes move with the movable plate 2 to the corresponding fixed platform 9, and finally, the connection between the starting section 83 and arc section 81, and between the U-shaped section 84 and the ending section 82 is established.

[0050] The method for detecting cracks in the inner wall of pipes utilizes one of the aforementioned crack detection devices.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A crack detection device, comprising: The base plate is characterized in that: a movable plate is slidably arranged above the base plate, two fixed platforms are symmetrically arranged on the top of the base plate, and a second driving component for driving the two fixed platforms to move is arranged on the top of the base plate; multiple pipes to be tested are placed on the movable plate, and multiple positioning components are arranged on the movable plate to position the pipes to a specified position; multiple clamping components are arranged on the movable plate to clamp the corresponding pipes. The tops of the two fixed platforms are jointly equipped with a track assembly, which includes an arc segment, a termination segment, a starting segment, and a U-shaped segment. The arc segment and the termination segment are fixedly installed on the top of one of the fixed platforms, while the starting segment and the U-shaped segment are fixedly installed on the top of the other fixed platform. Parts of the structure of the starting segment and the U-shaped segment are suspended in the air. A pipeline inspection trolley is installed on the track assembly. When the starting segment, the arc segment, the U-shaped segment, and the termination segment form a complete track assembly in sequence, the pipeline inspection trolley enters the interior of one of the pipelines from the starting segment and sequentially performs crack detection on the interiors of multiple pipelines along the trajectory of the track assembly. A first drive assembly for driving the moving plate is provided above the base plate. The first drive assembly includes two first vertical plates that are symmetrically fixedly connected to the top of the base plate. A transmission assembly is installed above the base plate. When the moving plate moves towards the fixed platform, the first drive assembly and the transmission assembly cooperate to enable the clamping assembly to operate and clamp the corresponding pipe. The clamping assembly includes two second fixed plates symmetrically fixedly connected to the top of the moving plate. A double-ended lead screw is rotatably connected between the two second fixed plates. The two ends of the outer surface of the double-ended lead screw are respectively provided with threads of opposite directions. Two arc-shaped clamping plates are symmetrically threaded onto the double-ended lead screw. The arc-shaped clamping plates are adapted to the pipe. The top of the moving plate has multiple first sliding grooves. The bottom of the two arc-shaped clamping plates is slidably connected to the inner side of the corresponding first sliding groove. One end of the double-ended lead screw... A driven bevel gear is fixedly connected to one of the second fixed plates; the transmission assembly includes two symmetrically arranged transmission racks, both of which are fixedly arranged between two first vertical plates. The transmission assembly also includes multiple fixed shafts rotatably arranged above the movable plate. Two first fixed plates are arranged on the outside of the fixed shafts. The bottom of the first fixed plates is fixedly connected to the movable plate. One end of the fixed shaft is rotatably connected to one of the first fixed plates, and the other end of the fixed shaft passes through the other first fixed plate. A driving bevel gear and a transmission gear are fixedly sleeved on the fixed shaft. The driving bevel gear meshes with the corresponding driven bevel gear, and the transmission gear meshes with the corresponding transmission rack.

2. The crack detection device according to claim 1, characterized in that: A first guide rod is fixedly connected between two first vertical plates, a first lead screw is rotatably connected between the two first vertical plates, and a horizontal plate is fixedly connected between the two first vertical plates. The horizontal plate is located below the first guide rod and the first lead screw. A movable seat is fixedly connected to the bottom of the movable plate. The bottom of the movable seat is slidably connected to the horizontal plate. The movable seat has a threaded hole adapted to the first lead screw and a cylindrical hole adapted to the first guide rod. The threaded hole and the cylindrical hole are connected to the outside of the movable plate. The threaded hole of the movable seat is threadedly connected to the first lead screw. The first guide rod passes through the cylindrical hole of the movable seat. A first motor is fixedly connected to the side of one of the first vertical plates. The output end of the first motor passes through the corresponding first vertical plate and is fixedly connected to one end of the first lead screw.

3. The crack detection device according to claim 1, characterized in that: The positioning component includes multiple limiting plates arranged linearly, with an arc-shaped opening at the top of each limiting plate to fit the pipe.

4. The crack detection device according to claim 1, characterized in that: The second drive assembly includes two second vertical plates symmetrically fixedly connected to the top of the base plate. A double-ended screw is rotatably connected between the two second vertical plates. The two ends of the outer surface of the double-ended screw are respectively provided with threads of opposite directions. A second guide rod is fixedly connected between the two second vertical plates. Two connecting plates are fixedly connected to the bottom of the fixed platform. The double-ended screw is threadedly connected to the connecting plates, and both the double-ended screw and the second guide rod pass through the connecting plates. A second motor is fixedly installed on the side of one of the second vertical plates. The output end of the second motor passes through the corresponding second vertical plate and is fixedly connected to one end of the double-ended screw.

5. The crack detection device according to claim 1, characterized in that: Multiple bearing plates are fixedly connected to the sides of the fixed platform corresponding to the arc segment and the termination segment, and the multiple bearing plates are respectively set at the ends of the arc segment and the termination segment.

6. The crack detection device according to claim 1, characterized in that: The top of the movable plate is equipped with a marking component, which includes multiple threaded rods, each corresponding to a pipe. A third fixing plate is located on both sides of each threaded rod, with its bottom fixed to the movable plate. A drive motor is fixed to the side of one of the third fixing plates, passing through the corresponding third fixing plate and fixedly connected to one end of the corresponding threaded rod. The other end of the threaded rod is rotatably connected to the side of another third fixing plate. A slider is threaded onto the threaded rod, passing through the corresponding threaded rod. The top of the movable plate has multiple second sliding grooves, each corresponding to a slider. The bottom of the slider is slidably connected to the corresponding second sliding groove. A movable plate is slidably connected inside the slider, passing through the slider. A marking pen is fixedly connected to the side of the movable plate near the corresponding pipe. A fixed column is fixedly connected to the bottom of the movable plate. The top of the movable plate has multiple guide grooves.

7. The crack detection device according to claim 6, characterized in that: The guide grooves are set one-to-one with the fixed columns. The bottom of the fixed columns is slidably connected in the corresponding guide grooves. The guide grooves include two far-away sections and one near-away section. The near-away section is set between the two far-away sections, and the far-away section and the near-away section are connected by an inclined section.

8. A method for detecting cracks in the inner wall of a pipe, characterized in that: The method for detecting cracks in the inner wall of a pipeline uses a crack detection device as described in any one of claims 1-7.

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