Steel pipe crack detection device

Abstract

The application relates to the technical field of steel pipe detection, in particular to a steel pipe crack detection device which comprises a detection platform, a rotating mechanism, an outer wall detection unit, an inner wall detection unit, a cleaning assembly and a data processing system. The rotating mechanism is composed of multiple independent driving modules and can realize synchronous or asynchronous rotation; the outer wall detection unit adopts a laser scanner and an ultrasonic probe, and the inner wall detection unit realizes detection through a flexible probe and an optical fiber sensor. The cleaning assembly pretreats the surface of the steel pipe, and the data processing system generates a three-dimensional image. The application can improve the detection comprehensiveness, the automation degree and the efficiency, is suitable for complex industrial field environments, and ensures the detection precision and stability.

Description

Technical Field

[0001] This utility model belongs to the field of non-destructive testing technology, specifically a steel pipe crack detection device. Background Technology

[0002] Existing steel pipe crack detection devices typically employ a single detection method, primarily targeting surface or internal defects in the steel pipe. This approach fails to achieve comprehensive coverage and has limitations in accuracy and efficiency. Furthermore, some existing devices lack effective pretreatment measures for the steel pipe surface before detection, making it susceptible to dust or impurities obscuring cracks, leading to missed detections or misjudgments and affecting the accuracy of the test results.

[0003] A search revealed a steel pipe crack detection device with publication number CN110044915B, published on November 2, 2021. This device includes a steel pipe crack detection workbench, a steel pipe fixing groove, and a rotating disc. The rotating disc drives the steel pipe to rotate, enabling omnidirectional inspection of the steel pipe surface. Simultaneously, the device performs a dust removal treatment on the steel pipe surface before inspection, improving detection accuracy. However, this device primarily targets the outer wall of the steel pipe, lacking the ability to detect internal cracks. Furthermore, the dust removal method is relatively simple and cannot handle complex surface contamination. In addition, the device lacks an automated identification system, still requiring manual judgment of crack conditions, resulting in low detection efficiency and failing to meet the demands of modern industry for intelligent and high-efficiency inspection equipment.

[0004] The aforementioned problems indicate that current steel pipe crack detection devices on the market still have significant shortcomings in terms of comprehensiveness, automation, efficiency, and adaptability to industrial environments. Therefore, this invention provides a steel pipe crack detection device to overcome these deficiencies, achieving efficient, accurate, and automated detection of cracks on the inner and outer walls of steel pipes, thus meeting the demands of modern industry for high-precision, intelligent detection equipment. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a steel pipe crack detection device, thereby solving the deficiencies of existing devices in terms of detection comprehensiveness, automation level, detection efficiency, and industrial site adaptability.

[0006] To solve the above technical problems, the following technical solution is adopted: A steel pipe crack detection device includes a detection platform and detection components mounted on the detection platform. The detection platform is characterized by a rotating mechanism composed of multiple rotating modules, each rotating module rotating synchronously or asynchronously via an independent drive unit. The detection components include an outer wall detection unit and an inner wall detection unit. The outer wall detection unit is located outside the rotating mechanism, and the inner wall detection unit extends into the steel pipe through a telescopic mechanism. The detection platform also includes a cleaning component and a data processing system. The cleaning component pre-treats the surface of the steel pipe, and the data processing system is connected to the detection components to receive and analyze detection signals.

[0007] Furthermore, the rotating mechanism consists of three rotating modules: a first rotating module, a second rotating module, and a third rotating module. Each rotating module is equipped with an independent drive motor, which is connected to the rotating module through a gear transmission system. Adjacent rotating modules are fixed together by detachable connectors and angle calibration is achieved through positioning pins.

[0008] Furthermore, when the rotating mechanism is running, the first rotating module drives the steel pipe to rotate axially, and the second and third rotating modules control the radial adjustment and eccentric compensation of the steel pipe respectively to ensure that the steel pipe maintains a stable posture during the testing process; the bottom of the rotating mechanism is provided with a support seat, and the support seat is embedded with a shock-absorbing spring, the two ends of which are in contact with the bottom plate of the support seat and the lower end surface of the rotating module respectively.

[0009] Furthermore, the outer wall detection unit includes a laser scanner and an ultrasonic probe. The laser scanner is mounted on the external support of the rotating mechanism, and the ultrasonic probe is connected to the external support via a slide rail. The slide rail has sliders at both ends, and the sliders are connected to the drive motor of the external support via a lead screw. The drive motor realizes the reciprocating motion of the sliders by forward and reverse rotation, thereby driving the ultrasonic probe to move along the surface of the steel pipe.

[0010] Furthermore, the inner wall detection unit includes a flexible probe and an optical fiber sensor. The flexible probe passes through the rotating mechanism via a telescopic mechanism and extends into the interior of the steel pipe. The telescopic mechanism includes a sleeve and a guide rod. The inner wall of the sleeve is provided with a spiral groove, and the outer wall of the guide rod is provided with a protrusion that matches the spiral groove. The guide rod achieves linear movement by cooperating with the sleeve through the spiral groove. The optical fiber sensor is installed at the front end of the flexible probe, and the signal line of the optical fiber sensor is led out through the channel inside the guide rod and connected to the data processing system.

[0011] Furthermore, the cleaning assembly includes a high-pressure airflow nozzle and a brush roller. The high-pressure airflow nozzle is installed at the inlet of the rotating mechanism, and the brush roller is connected to the side wall of the rotating mechanism via a rotating shaft. The surface of the brush roller is provided with elastic bristles, the length of which is adapted to the radius of curvature of the steel pipe surface. The high-pressure airflow nozzle is connected to a compressed air source via a pipe, and a flow regulating valve is provided on the pipe to control the airflow intensity.

[0012] Furthermore, the data processing system includes a signal acquisition module and a data analysis module. The signal acquisition module is connected to a laser scanner, an ultrasonic probe, and a fiber optic sensor via cables to receive detection signals. The data analysis module processes the detection signals using algorithms to generate three-dimensional images of cracks on the inner and outer walls of the steel pipe. The outer casing of the data processing system is provided with heat dissipation holes, and a dustproof net is provided inside the heat dissipation holes. The dustproof net is fixed to the inner wall of the outer casing by clips.

[0013] Furthermore, the detection platform is also equipped with an auxiliary positioning mechanism, which includes a clamping arm and a positioning sensor. The clamping arm is connected to the side wall of the detection platform through a hydraulic cylinder, and the piston rod of the hydraulic cylinder is hinged to the middle of the clamping arm. The positioning sensor is installed at the front end of the clamping arm and is used to detect the position and attitude information of the steel pipe. A rubber pad is provided on the inner side of the clamping arm, and the rubber pad is fixed to the clamping surface of the clamping arm by bolts.

[0014] Furthermore, the bottom of the testing platform is equipped with a movable base, which includes four casters. The casters are connected to the base plate of the testing platform by bolts. The casters are equipped with a braking device, which is connected to the operation panel of the testing platform by a pull rod. The operation panel is equipped with a start button and a stop button, which are respectively connected to the control circuit of the data processing system by wires.

[0015] Furthermore, the top of the testing platform is equipped with a protective cover, the inner wall of which is lined with sound-absorbing material, which is fixed to the inner surface of the protective cover with adhesive; the front of the protective cover is equipped with a transparent observation window, which is connected to the frame of the protective cover by a hinge; the rear of the protective cover is equipped with a ventilation opening, and an exhaust fan is installed inside the ventilation opening, which is connected to the power supply system of the testing platform via a power cord.

[0016] Furthermore, the operation panel of the testing platform is also equipped with a display screen and an input keyboard. The display screen is connected to the output end of the data processing system via a video cable, and the input keyboard is connected to the input end of the data processing system via a data cable. A mounting bracket is provided on the back of the display screen, and the mounting bracket is fixed to the inside of the operation panel with screws. An anti-slip pad is provided at the bottom of the input keyboard, and the anti-slip pad is fixed to the lower surface of the input keyboard with double-sided tape.

[0017] Furthermore, the side wall of the testing platform is equipped with a toolbox, and the inside of the toolbox is equipped with a partition plate, which divides the toolbox into multiple storage areas; the cover of the toolbox is connected to the frame of the toolbox by a hinge, and a magnetic strip is provided on the inner side of the cover plate, which is fixed to the inner surface of the cover plate with glue; the bottom of the toolbox is equipped with a drainage hole, which is sealed with a sealing plug.

[0018] Furthermore, the power supply system of the testing platform includes a main power supply and a backup power supply. The main power supply is connected to the mains power supply via a cable, and the backup power supply is connected to the battery via an inverter. A switching switch is provided between the main power supply and the backup power supply. The switching switch is connected to the control circuit of the testing platform via a wire. The operating handle of the switching switch is connected to the outer shell of the testing platform via a thread.

[0019] Furthermore, the bottom of the testing platform is provided with a horizontal adjustment foot, which is connected to the base plate of the testing platform by threads; the bottom of the horizontal adjustment foot is provided with an anti-slip washer, which is fixed to the lower end of the horizontal adjustment foot by a pressure ring; the upper end of the horizontal adjustment foot is provided with a scale, which is fixed to the outer wall of the horizontal adjustment foot by rivets.

[0020] Furthermore, the side wall of the testing platform is also equipped with a warning light, which is connected to the frame of the testing platform via a bracket. The two ends of the bracket are fixed to the side wall of the testing platform with bolts. The lamp cover of the warning light is equipped with LED beads, which are connected to the control circuit of the testing platform via wires. The outside of the lamp cover of the warning light is equipped with a protective net, which is fixed to the outer wall of the lamp cover with buckles.

[0021] Furthermore, the top of the testing platform is provided with a lifting ring, which is connected to the top plate of the testing platform by bolts; the inner wall of the lifting ring is provided with a wear-resistant coating, which is fixed to the inner surface of the lifting ring by a spraying process; the outer side of the lifting ring is provided with an identification plate, which is fixed to the outer wall of the lifting ring by rivets.

[0022] Furthermore, the side wall of the testing platform is provided with a nameplate, which is fixed to the outer wall of the testing platform by screws; the surface of the nameplate is provided with a waterproof coating, which is fixed to the surface of the nameplate by a spraying process; the back of the nameplate is provided with a reinforcing rib, which is fixed to the back of the nameplate by welding.

[0023] Furthermore, the bottom of the testing platform is provided with a drainage trough, which is connected to the base plate of the testing platform by bolts; the bottom of the drainage trough is provided with a drainage pipe, which is connected to the outlet of the drainage trough by a flange; the end of the drainage pipe is provided with a filter, which is connected to the end of the drainage pipe by threads.

[0024] Furthermore, the side wall of the testing platform is provided with a ventilation window, which is connected to the frame of the testing platform by a hinge; the inner side of the ventilation window is provided with an insect-proof net, which is fixed to the inner surface of the ventilation window by a buckle; the outer side of the ventilation window is provided with a rain shield, which is fixed to the outer wall of the ventilation window by bolts.

[0025] Furthermore, the top of the testing platform is equipped with a lighting lamp, which is connected to the top plate of the testing platform via a bracket; the lampshade of the lighting lamp is equipped with an energy-saving lamp tube, which is connected to the power supply system of the testing platform via a wire; the outside of the lampshade of the lighting lamp is equipped with a reflector, which is fixed to the outer wall of the lampshade by rivets.

[0026] Furthermore, the side wall of the testing platform is provided with a grounding terminal, which is connected to the frame of the testing platform by bolts; the surface of the grounding terminal is provided with a nickel plating layer, which is fixed to the surface of the grounding terminal by an electroplating process; the bottom of the grounding terminal is provided with a wiring hole, which is connected to the bottom of the grounding terminal by a thread.

[0027] Furthermore, the bottom of the testing platform is provided with a shock-absorbing pad, which is fixed to the base plate of the testing platform by adhesive; the surface of the shock-absorbing pad is provided with anti-slip texture, which is fixed to the surface of the shock-absorbing pad by a mold forming process; the bottom of the shock-absorbing pad is provided with a drainage groove, which is connected to the bottom of the shock-absorbing pad by threads. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the steel pipe crack detection device of this utility model.

[0029] Figure 2 This is a partially enlarged view of the rotating mechanism and detection component in this utility model.

[0030] Figure 3 This is a schematic diagram of the outer wall detection unit in this utility model.

[0031] Figure 4 This is a schematic diagram of the inner wall detection unit in this utility model.

[0032] Figure 5 This is a schematic diagram showing the arrangement of the cleaning components in this utility model.

[0033] Figure 6 This is a block diagram showing the module connection of the data processing system in this utility model.

[0034] The attached figures are labeled as follows: 1. Detection platform; 2. Rotation mechanism; 3. Outer wall detection unit; 4. Inner wall detection unit; 5. Cleaning assembly; 6. Data processing system; 7. Support base; 8. Telescopic mechanism; 9. Laser scanner; 10. Ultrasonic probe; 11. Flexible probe; 12. Fiber optic sensor; 13. High-pressure airflow nozzle; 14. Brush roller; 15. Signal acquisition module; 16. Data analysis module; 17. Protective cover; 18. Movable base; 19. Warning light; 20. Lifting ring. Detailed Implementation

[0035] The steel pipe crack detection device of this utility model is as follows: Figure 1 As shown, the overall structure includes a detection platform 1, a rotating mechanism 2, an outer wall detection unit 3, an inner wall detection unit 4, a cleaning component 5, and a data processing system 6. The detection platform 1 serves as the foundation of the entire device, with a protective cover 17 on top and a movable base 18 for position adjustment at the bottom. The rotating mechanism 2 consists of three rotating modules: a first rotating module, a second rotating module, and a third rotating module. Each rotating module is mounted on the detection platform 1 and powered by an independent drive motor. The drive motor is connected to the rotating module via a gear transmission system to ensure precise control of the rotation. Adjacent rotating modules are fixed together by detachable connectors and calibrated by positioning pins. A support base 7 is located at the bottom of the rotating mechanism 2 to stabilize it. The support base 7 contains embedded shock-absorbing springs, with both ends contacting the base plate of the support base 7 and the lower end face of the rotating module, respectively, to reduce vibration during operation.

[0036] like Figure 2 As shown, the outer wall detection unit 3 is located outside the rotating mechanism 2 and includes a laser scanner 9 and an ultrasonic probe 10. The laser scanner 9 is mounted on the external support of the rotating mechanism 2 and is used to scan and detect the outer wall of the steel pipe. The ultrasonic probe 10 is connected to the external support via a slide rail. Slider blocks are located at both ends of the slide rail, and these sliders are connected to the drive motor of the external support via a lead screw. When the drive motor rotates forward and backward, it drives the sliders to reciprocate along the slide rail, thereby enabling the ultrasonic probe 10 to move and detect along the surface of the steel pipe. The inner wall detection unit 4 passes through the rotating mechanism 2 and extends into the interior of the steel pipe via a telescopic mechanism 8, as shown... Figure 4 As shown, the inner wall detection unit 4 includes a flexible probe 11 and an optical fiber sensor 12. The flexible probe 11 achieves linear motion through the cooperation of the sleeve and guide rod of the telescopic mechanism 8. The inner wall of the sleeve is provided with a spiral groove, and the outer wall of the guide rod is provided with a protrusion that matches the spiral groove. The guide rod completes the telescopic action through the cooperation of the spiral groove and the sleeve. The optical fiber sensor 12 is installed at the front end of the flexible probe 11, and the signal line is led out through the internal channel of the guide rod and connected to the data processing system 6 for collecting the detection signal of the inner wall of the steel pipe.

[0037] Cleaning component 5, etc. Figure 5 As shown, the cleaning assembly 5, located at the inlet of the rotating mechanism 2, includes a high-pressure airflow nozzle 13 and a brush roller 14. The high-pressure airflow nozzle 13 is connected to a compressed air source via a pipe, and a flow regulating valve is installed on the pipe to control the airflow intensity. The brush roller 14 is connected to the side wall of the rotating mechanism 2 via a rotating shaft, and its surface is equipped with elastic bristles. The length of the elastic bristles is adapted to the radius of curvature of the steel pipe surface, which can effectively remove impurities adhering to the steel pipe surface. The function of the cleaning assembly 5 is to provide a clean steel pipe surface for subsequent testing, ensuring testing accuracy.

[0038] Data processing system 6, etc. Figure 6 As shown, the system includes a signal acquisition module 15 and a data analysis module 16. The signal acquisition module 15 is connected to the laser scanner 9, ultrasonic probe 10, and fiber optic sensor 12 via cables to receive detection signals. The data analysis module 16 processes the detection signals using algorithms to generate three-dimensional images of the cracks on the inner and outer walls of the steel pipe. The outer casing of the data processing system 6 is equipped with heat dissipation holes, and a dustproof mesh is installed inside the heat dissipation holes. The dustproof mesh is fixed to the inner wall of the outer casing with clips to ensure the system's heat dissipation performance and dustproof effect.

[0039] An auxiliary positioning mechanism is installed on the inspection platform 1, including a clamping arm and a positioning sensor. The clamping arm is connected to the side wall of the inspection platform 1 via a hydraulic cylinder. The piston rod of the hydraulic cylinder is hinged to the middle of the clamping arm. A rubber pad is provided on the inner side of the clamping arm, and the rubber pad is fixed to the clamping surface of the clamping arm by bolts to protect the surface of the steel pipe. The positioning sensor is installed at the front end of the clamping arm to detect the position and orientation information of the steel pipe, ensuring that the steel pipe maintains a stable orientation during the inspection process.

[0040] Mobile base 18 Figure 1 As shown, the device includes four casters, which are bolted to the base plate of the testing platform 1. Each caster is equipped with a brake device, which is connected to the operation panel of the testing platform 1 via a pull rod. The operation panel has a start button and a stop button, which are connected to the control circuit of the data processing system 6 via wires to control the start and stop of the entire device.

[0041] The inner wall of the protective cover 17 is lined with sound-absorbing material, which is fixed to the inner surface of the protective cover 17 with adhesive to reduce noise generated during operation. A transparent observation window is located on the front of the protective cover 17, connected to the frame of the protective cover 17 by hinges for easy observation of the testing process. A ventilation opening is located on the rear of the protective cover 17, containing an exhaust fan. The exhaust fan is connected to the power supply system of the testing platform 1 via a power cord to improve ventilation conditions inside the device.

[0042] The control panel also features a display screen and an input keyboard. The display screen is connected to the output of the data processing system 6 via a video cable, and the input keyboard is connected to the input of the data processing system 6 via a data cable. A mounting bracket is located on the back of the display screen and is fixed to the inside of the control panel with screws. The bottom of the input keyboard has an anti-slip pad, which is fixed to the lower surface of the keyboard with double-sided tape to ensure operational stability.

[0043] The toolbox is located on the side wall of the testing platform 1. The toolbox interior is divided into multiple storage areas by a partition, facilitating the categorization and storage of tools. The toolbox lid is connected to the toolbox frame via hinges, and a magnetic strip is installed on the inside of the lid, which is glued to the inner surface of the lid for secure fastening. A drainage hole is located at the bottom of the toolbox, sealed with a plug to prevent water accumulation.

[0044] The power supply system includes a main power supply and a backup power supply (not shown in the figure). The main power supply is connected to the mains power via a cable, and the backup power supply is connected to the battery via an inverter. A switch is provided between the main power supply and the backup power supply. The switch is connected to the control circuit of the detection platform 1 via a wire, and the operating handle of the switch is connected to the outer shell of the detection platform 1 via a thread, which is used to switch to the backup power supply when the main power supply fails.

[0045] The leveling feet are located at the bottom of the testing platform 1 and are connected to the base plate of the testing platform 1 by threads. Anti-slip washers are provided at the bottom of the leveling feet and are fixed to the lower end of the leveling feet by pressure rings to enhance the stability of the device. A scale is provided at the upper end of the leveling feet and is fixed to the outer wall of the leveling feet by rivets, facilitating precise adjustment of the device's level.

[0046] Warning light 19 is connected to the frame of detection platform 1 via a bracket, with both ends of the bracket fixed to the side wall of detection platform 1 by bolts. LED beads are installed inside the lamp cover of warning light 19, and these LED beads are connected to the control circuit of detection platform 1 via wires to indicate the operating status of the device. A protective net is installed on the outside of the lamp cover, and the protective net is fixed to the outer wall of the lamp cover by clips to protect the lamp cover.

[0047] The lifting ring 20 is connected to the top plate of the testing platform 1 by bolts. The inner wall of the lifting ring 20 is coated with a wear-resistant coating, which is fixed to the inner surface of the lifting ring 20 by a spraying process to enhance its durability. An identification plate is provided on the outer side of the lifting ring 20, which is fixed to the outer wall of the lifting ring 20 by rivets and is used to indicate relevant information about the device.

[0048] The nameplate is fixed to the outer wall of the testing platform 1 with screws. The surface of the nameplate is covered with a waterproof coating, which is applied by spraying to protect the contents of the nameplate. Reinforcing ribs are provided on the back of the nameplate and are fixed to the back by welding to enhance the structural strength of the nameplate.

[0049] A drainage trough is installed at the bottom of the testing platform 1 and is connected to the base plate of the testing platform 1 by bolts. A drainage pipe is installed at the bottom of the drainage trough and is connected to the outlet of the drainage trough by a flange. A filter is installed at the end of the drainage pipe and is connected to the end of the drainage pipe by threads to filter impurities in the drainage.

[0050] A ventilation window is installed on the side wall of the detection platform 1. The ventilation window is connected to the frame of the detection platform 1 by hinges. An insect-proof net is installed on the inner side of the ventilation window and is fixed to the inner surface of the ventilation window with buckles to prevent insects from entering. A rain shield is installed on the outer side of the ventilation window and is fixed to the outer wall of the ventilation window with bolts to prevent rainwater from entering.

[0051] The lighting fixture is connected to the top plate of the testing platform 1 via a bracket. An energy-saving lamp is installed inside the lampshade, and the lamp is connected to the power supply system of the testing platform 1 via wires to provide illumination inside the device. A reflector is installed on the outside of the lampshade, and the reflector is fixed to the outer wall of the lampshade with rivets to enhance the lighting effect.

[0052] The grounding terminal is connected to the frame of the testing platform 1 by bolts. The surface of the grounding terminal is coated with a nickel layer, which is fixed to the surface of the grounding terminal by an electroplating process to enhance the corrosion resistance of the grounding terminal. The bottom of the grounding terminal is provided with a wiring hole, which is connected to the bottom of the grounding terminal by a thread for connecting the grounding wire.

[0053] The shock-absorbing pad is fixed to the base plate of the testing platform 1 with adhesive. The surface of the shock-absorbing pad has anti-slip texture, which is fixed to the surface of the shock-absorbing pad through a molding process to enhance the stability of the device. The bottom of the shock-absorbing pad has a drainage groove, which is connected to the bottom of the shock-absorbing pad by threads to drain water accumulated on the shock-absorbing pad.

[0054] The above-mentioned components, through reasonable layout and connection, realize the function of the steel pipe crack detection device, which can efficiently and comprehensively complete the detection of cracks on the inner and outer walls of steel pipes in industrial sites.

[0055] To enable those skilled in the art to fully understand and implement this utility model, the following provides further explanation of the operating principle and implementation steps of the steel pipe crack detection device in conjunction with a specific application scenario.

[0056] In industrial settings, steel pipes to be inspected are typically placed on inspection platform 1 using hoisting equipment. First, the operator inserts one end of the steel pipe into the first rotating module of the rotating mechanism 2, and the pipe is initially secured by the clamping arm in the auxiliary positioning mechanism. The clamping arm is driven by a hydraulic cylinder, and its inner rubber pad effectively protects the surface of the steel pipe from damage. Simultaneously, positioning sensors monitor the position and orientation of the steel pipe in real time and transmit the data to the data processing system 6, ensuring the pipe is in the optimal inspection orientation. Subsequently, the leveling feet 7 precisely calibrate the level of inspection platform 1 by rotating the adjustment dial, reducing inspection errors caused by uneven ground.

[0057] Cleaning component 5 is then activated. High-pressure airflow nozzle 13 is connected to a compressed air source via a pipe, generating a suitable airflow intensity under the control of a flow regulating valve to remove dust and particulate matter from the steel pipe surface. Brush roller 14, driven by a rotating shaft, rotates elastic bristles along the steel pipe surface. The length of the elastic bristles is adapted to the radius of curvature of the steel pipe, enabling it to penetrate deep into fine grooves to remove stubborn dirt. After this pre-cleaning treatment, the steel pipe surface is clean, providing a reliable foundation for subsequent testing.

[0058] Subsequently, the rotating mechanism 2 begins operation. The first rotating module drives the steel pipe to rotate axially via an independent drive motor, while the second and third rotating modules are responsible for radial adjustment and eccentricity compensation, respectively. The damping springs within the support 7 effectively absorb vibrations generated during rotation, ensuring the steel pipe remains stable during high-speed rotation. At this time, the outer wall detection unit 3 is activated, and the laser scanner 9 performs a full-range scan of the steel pipe's outer wall, generating high-precision surface topography data. The ultrasonic probe 10 reciprocates along the steel pipe surface via a screw drive system on a slide rail, utilizing the principle of ultrasonic wave reflection to detect potential cracks in the outer wall of the steel pipe. The signal acquisition module 15 receives the detection data from the laser scanner 9 and the ultrasonic probe 10 and transmits it to the data analysis module 16 for processing.

[0059] Meanwhile, the inner wall detection unit 4 sends the flexible probe 11 into the steel pipe via the telescopic mechanism 8. The guide rod of the flexible probe 11 completes linear motion through a helical groove and sleeve. The fiber optic sensor 12 is installed at the front end of the flexible probe 11 to collect detection signals from the inner wall of the steel pipe in real time. Due to its high sensitivity and anti-interference capability, the fiber optic sensor 12 can accurately capture the characteristic information of tiny cracks in the inner wall. These signals are led out through the internal channel of the guide rod and finally transmitted to the data processing system 6 for analysis.

[0060] The algorithm in data processing system 6 comprehensively processes the detection signals from the inner and outer walls to generate a three-dimensional image of the steel pipe crack. This image not only visually displays the location and shape of the crack, but also allows for quantitative evaluation of parameters such as crack depth and length through data analysis module 16. The display screen on the operation panel shows the detection results in real time, and the keyboard allows operators to adjust detection parameters or view detailed reports as needed.

[0061] During testing, the sound-absorbing material inside the protective cover 17 effectively reduces operating noise, and the transparent observation window allows operators to monitor the testing status at any time. The exhaust fan inside the ventilation vent runs continuously to ensure air circulation inside the device and prevent overheating from affecting equipment performance. The warning light 19 uses LED beads to indicate the device's operating status; if an abnormality is detected, the warning light 19 will flash to remind the operator to handle the situation promptly.

[0062] After testing, the steel pipe is removed from the rotating mechanism 2. The dividers inside the toolbox facilitate the categorized storage of testing tools, and the bottom drainage hole prevents water accumulation. In the event of a main power failure, a switch can quickly switch to backup power, ensuring uninterrupted testing. Furthermore, the lifting ring 20 is designed for easy transport of the entire device, its wear-resistant coating enhances its durability, and the identification plate provides clear device information.

[0063] Through the above steps, the steel pipe crack detection device of this invention achieves comprehensive and accurate detection of cracks on the inner and outer walls of steel pipes, significantly improving detection efficiency and automation. The coordinated operation of each component ensures the device's high adaptability to industrial sites, meeting the needs of modern industry for intelligent detection equipment.

Claims

1. A steel pipe crack detection device, comprising a detection platform and detection components installed on the detection platform, characterized in that: The testing platform is equipped with a rotating mechanism consisting of multiple rotating modules, each rotating module rotating synchronously or asynchronously through an independent drive unit; the testing component includes an outer wall testing unit and an inner wall testing unit, the outer wall testing unit being located outside the rotating mechanism, and the inner wall testing unit passing through the rotating mechanism and extending into the interior of the steel pipe through a telescopic mechanism; the testing platform also includes a cleaning component and a data processing system, the cleaning component being used to pre-treat the surface of the steel pipe, and the data processing system being connected to the testing component to receive and analyze the testing signals.

2. The steel pipe crack detection device according to claim 1, characterized in that: The rotating mechanism consists of three rotating modules: a first rotating module, a second rotating module, and a third rotating module. Each rotating module is equipped with an independent drive motor, which is connected to the rotating module through a gear transmission system. Adjacent rotating modules are fixed together by detachable connectors and angle calibration is achieved through positioning pins.

3. The steel pipe crack detection device according to claim 2, characterized in that: When the rotating mechanism is running, the first rotating module drives the steel pipe to rotate axially, and the second and third rotating modules control the radial adjustment and eccentric compensation of the steel pipe, respectively. The bottom of the rotating mechanism is provided with a support seat, and the support seat is embedded with a shock-absorbing spring. The two ends of the shock-absorbing spring contact the bottom plate of the support seat and the lower end surface of the rotating module, respectively.

4. The steel pipe crack detection device according to claim 1, characterized in that: The outer wall detection unit includes a laser scanner and an ultrasonic probe. The laser scanner is mounted on the external support of the rotating mechanism, and the ultrasonic probe is connected to the external support via a slide rail. The slide rail has sliders at both ends, and the sliders are connected to the drive motor of the external support via a lead screw. The drive motor realizes the reciprocating motion of the sliders by forward and reverse rotation, thereby driving the ultrasonic probe to move along the surface of the steel pipe.

5. The steel pipe crack detection device according to claim 1, characterized in that: The inner wall detection unit includes a flexible probe and an optical fiber sensor. The flexible probe passes through the rotating mechanism via a telescopic mechanism and extends into the interior of the steel pipe. The telescopic mechanism includes a sleeve and a guide rod. The inner wall of the sleeve is provided with a spiral groove, and the outer wall of the guide rod is provided with a protrusion that matches the spiral groove. The guide rod achieves linear movement by cooperating with the sleeve through the spiral groove. The optical fiber sensor is installed at the front end of the flexible probe, and the signal line of the optical fiber sensor is led out through the channel inside the guide rod and connected to the data processing system.

6. The steel pipe crack detection device according to claim 1, characterized in that: The cleaning assembly includes a high-pressure airflow nozzle and a brush roller. The high-pressure airflow nozzle is installed at the inlet of the rotating mechanism, and the brush roller is connected to the side wall of the rotating mechanism via a rotating shaft. The surface of the brush roller is provided with elastic bristles, the length of which is adapted to the radius of curvature of the steel pipe surface. The high-pressure airflow nozzle is connected to a compressed air source via a pipe, and a flow regulating valve is provided on the pipe.

7. The steel pipe crack detection device according to claim 1, characterized in that: The data processing system includes a signal acquisition module and a data analysis module. The signal acquisition module is connected to a laser scanner, an ultrasonic probe, and a fiber optic sensor via cables to receive detection signals. The data analysis module processes the detection signals using algorithms to generate three-dimensional images of cracks on the inner and outer walls of the steel pipe. The outer shell of the data processing system is provided with heat dissipation holes, and a dustproof net is provided on the inner side of the heat dissipation holes. The dustproof net is fixed to the inner wall of the outer shell by clips.

8. The steel pipe crack detection device according to claim 1, characterized in that: The testing platform is also equipped with an auxiliary positioning mechanism, which includes a clamping arm and a positioning sensor. The clamping arm is connected to the side wall of the testing platform via a hydraulic cylinder, and the piston rod of the hydraulic cylinder is hinged to the middle of the clamping arm. The positioning sensor is installed at the front end of the clamping arm and is used to detect the position and orientation information of the steel pipe. A rubber pad is provided on the inner side of the clamping arm, and the rubber pad is fixed to the clamping surface of the clamping arm by bolts.

9. The steel pipe crack detection device according to claim 1, characterized in that: The bottom of the testing platform is equipped with a movable base, which includes four omnidirectional wheels and two directional wheels. The omnidirectional wheels are connected to the base plate of the testing platform by bolts, and the directional wheels are connected to the rear end of the testing platform by brackets. The omnidirectional wheels are equipped with a braking device, which is connected to the operation panel of the testing platform by a pull rod. The operation panel is equipped with a start button and a stop button, which are respectively connected to the control circuit of the data processing system by wires.

10. The steel pipe crack detection device according to claim 1, characterized in that: The top of the testing platform is equipped with a protective cover, and the inner wall of the protective cover is lined with sound-absorbing material, which is fixed to the inner surface of the protective cover with adhesive. The front of the protective cover is equipped with a transparent observation window, which is connected to the frame of the protective cover by a hinge. The rear of the protective cover is equipped with a ventilation opening, and an exhaust fan is installed in the ventilation opening. The exhaust fan is connected to the power supply system of the testing platform through a power cord.

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