Stainless steel tube and inner hole surface defect detector thereof

Abstract

The invention relates to the technical field of pipeline detection, in particular to a stainless steel pipe and an inner hole surface defect detection machine thereof.The stainless steel pipe comprises a pipe wall, and an inner through hole is formed in the center of the pipe wall; the detection machine comprises symmetrically arranged pipeline robots, a zinc sulfide protection window arranged between the two pipeline robots, a cylindrical mounting table mounted at one end of the zinc sulfide protection window, and four jet heads uniformly arranged on one side, facing the zinc sulfide protection window, of the cylindrical mounting table, and the hollow supporting seats are fixedly connected to the other end of the zinc sulfide protection window and are uniformly arranged on one sides of the hollow supporting seats. Viscous oil stains and metal dust on the surface of the zinc sulfide protection window are removed through the synergistic effect that the scraping assembly drives the arc-shaped scraping plate to conduct mechanical scraping, the cleaning assembly drives the cleaning agent to conduct chemical dissolution and the air curtain assembly conducts directional airflow instant drying, and the situation that a residual liquid film interferes with laser and infrared signal paths is avoided; the detection precision and the detection efficiency of the detection assembly are improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline detection, in particular to a stainless steel pipe and an inner hole surface defect detection machine thereof. Background Art

[0002] In the high-precision manufacturing of stainless steel pipes, non-destructive and efficient detection of inner bore surface defects is crucial. Laser infrared thermal imaging technology, due to its non-contact, high sensitivity, and imaging capabilities, has become a preferred option in this field. It works by precisely projecting a high-energy laser beam onto the inner surface of the pipe wall through an endoscopic optical system for localized thermal stimulation. Due to the differences in thermophysical properties between the defective area and the base material, different temperature changes occur upon heating, which are released as infrared radiation. The system captures and analyzes these radiation signals using an infrared thermal imager to reconstruct an image of the inner surface defect.

[0003] However, operating this optical system deep inside a pipe presents a significant challenge: contaminants such as residual cutting fluid, lubricating oil, condensed water vapor, and metal dust in the pipe easily adhere to the surface of the optical system. Consequently, these contaminants scatter, absorb, and reflect the incident laser light. This significantly attenuates the laser energy that actually reaches the pipe wall and distorts its distribution. The result is insufficient thermal excitation intensity and uneven regional temperatures, which directly weakens the intensity of the thermal response signal generated by the defect. At the same time, contaminants absorb infrared radiation in specific wavelengths and scatter the signal. This significantly weakens the thermal signal emitted by the pipe wall defect and reduces the spatial resolution, blurring the defect features and making them difficult to accurately identify.

[0004] Currently, air knife sweeping or scraping with a blade are commonly used to address contamination issues. However, while conventional air knives effectively remove dust, their removal rate for thick oils is low, and the residual liquid film continues to interfere with both the laser and infrared paths. Furthermore, after scraping with a separate scraper, the lack of immediate drying causes the residual detergent to form an uneven liquid film, which not only exacerbates laser scattering but also absorbs infrared radiation. Consequently, both thick oils and residual detergent can severely impact the optical system's detection accuracy, reducing the overall detection efficiency of the device. Summary of the Invention

[0005] The object of the present invention is to provide a stainless steel pipe and an inner hole surface defect detection machine thereof to solve the problems raised in the above background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A stainless steel pipe inner hole surface defect detection machine, preferably, the stainless steel pipe includes a pipe wall, and an inner through hole is provided in the center of the pipe wall; the inner hole surface defect detection machine enters the interior of the inner through hole along the axial direction of the pipe wall, and the inner hole surface defect detection machine includes symmetrically arranged pipeline robots, a zinc sulfide protection window is provided between two of the pipeline robots, one end of the zinc sulfide protection window is installed with a cylindrical mounting platform, four nozzles are evenly provided on the side of the cylindrical mounting platform facing the zinc sulfide protection window, the other end of the zinc sulfide protection window is fixedly connected to a hollow support seat, four arc-shaped cleaning nozzles are evenly provided on one side of the hollow support seat, the four arc-shaped cleaning nozzles are circularly arranged on the outer periphery of the zinc sulfide protection window, and an arc-shaped scraper is fixedly connected to the end of the arc-shaped cleaning nozzle facing the zinc sulfide protection window and is in contact with the outer surface of the zinc sulfide protection window;

[0008] A detection component is provided inside the zinc sulfide protection window, which is used to monitor the local temperature inside the zinc sulfide protection window and the defects of the inner wall of the tube wall. A scraping component is provided inside the hollow support seat, which is used to drive the arc scraper to move axially along the zinc sulfide protection window to scrape pollutants. An adjustment component is provided at one end of the zinc sulfide protection window, which is used to drive the nozzle to deflect to the direction toward the surface of the zinc sulfide protection window to focus the airflow to blow against the zinc sulfide protection window. An air curtain component is provided inside the cylindrical mounting platform, which is used to provide compressed air to the nozzle. A cleaning component is provided inside the hollow support seat, which is used to spray detergent in the forward direction of the arc scraper to dissolve oil stains.

[0009] Preferably, the detection assembly includes a detection box rotatably connected to one end of the hollow support seat, and the detection box is arranged inside the zinc sulfide protective window, four infrared imaging modules are evenly fixedly connected to the outer periphery of the detection box, a fiber laser is fixedly connected to the end of the detection box away from the hollow support seat, a beam splitter is fixedly connected to the output end of the fiber laser, and two temperature sensors are symmetrically fixedly connected to the inner side of the zinc sulfide protective window.

[0010] Preferably, the scraping assembly includes four scraping grooves evenly opened on the outer periphery of the hollow support seat, a movable rack slidably connected to the inside of the scraping groove and fixedly connected to the arc-shaped cleaning nozzle at one end, four transmission grooves evenly opened on the outer periphery of the hollow support seat, a transmission slider slidably connected to the inside of the transmission groove, a transmission gear rotatably connected to one end of the transmission slider, and four fixed racks evenly fixedly connected to the outer periphery of the hollow support seat, wherein the transmission gear is arranged between the movable rack and the fixed rack and is synchronously meshed with the two.

[0011] Preferably, the extension direction of the transmission chute is parallel to the scraping chute, and the length of the movable rack is greater than % of the stroke of the fixed rack.

[0012] Preferably, the scraping assembly also includes a main gear rotatably connected to the inside of the hollow support seat, four satellite gears evenly arranged inside the hollow support seat, arranged in a circle and meshing with the main gear, a transmission rod fixedly connected to one end of the satellite gear and rotatably connected to the hollow support seat, a spiral groove opened on the outer periphery of the transmission rod, a ball head rod fixedly connected to the end of the transmission slider away from the transmission gear, the ball head end of which is embedded in the spiral groove, a motor fixedly connected to the inside of the hollow support seat, a reducer fixedly connected to the output end of the motor, and the output end of the reducer is coaxially fixed with the main gear, the transmission gear is used in conjunction with the moving rack and the fixed rack, so that the arc scraper can move more than twice the transmission gear moving stroke along the length direction of the transmission slide groove, thereby improving the scraping range of the arc scraper.

[0013] Preferably, the adjustment assembly includes a fixed plate fixedly connected to one end of the cylindrical mounting platform facing the zinc sulfide protection window, four fixed sliding grooves evenly opened at one end of the fixed plate, an adjustment rack slidably connected to the inside of the fixed sliding groove, four incomplete gears evenly hinged to the side of the fixed plate facing the zinc sulfide protection window and fixedly connected to the nozzle at one end, an annular air storage opened inside the fixed plate and connected to the nozzle through a pipe, and a return spring fixedly connected to one end of the adjustment rack and arranged inside the fixed sliding groove.

[0014] Preferably, the adjustment assembly also includes a resistance wheel rotatably connected to one end of the adjustment rack, an I-shaped wheel fixedly connected to the end of the beam splitter and passing through the fixed plate and rotatably connected to it, four triangular protrusions evenly fixedly connected to the outer periphery of the I-shaped wheel and whose inclined surfaces roll in resistance against the resistance wheel, and an outer gear ring fixedly connected to one end of the detection box and meshing with the satellite gear.

[0015] Preferably, the air curtain assembly includes a micro air compressor fixedly connected to the inside of the cylindrical mounting platform, a filter fixedly connected to the air inlet of the micro air compressor and with the input end extending to the outside of the cylindrical mounting platform, and four vortex tubes evenly fixedly connected to the output end of the micro air compressor and with the output end connected to the inside of the fixed plate.

[0016] Preferably, the cleaning component includes an infusion tube fixedly connected to the input end of the arc-shaped cleaning nozzle, a liquid storage tank and an installation tank opened inside the hollow support seat, and a water pump fixedly connected to the inside of the installation tank and with its input end extending to the inside of the liquid storage tank.

[0017] Preferably, the cleaning component also includes four groups of storage grooves opened on the outer periphery of the hollow support seat, a storage slider slidably connected to the inside of the storage groove, a T-shaped guide rod fixedly connected to the top of the storage slider, a storage spring fixedly connected to the inside of the storage groove and connected to the storage slider at one end, and a T-shaped positioning rod evenly fixedly connected to the outer periphery of the hollow support seat, wherein the middle section of the infusion tube is S-shaped and wraps around the outer periphery of the T-shaped guide rod.

[0018] Beneficial effects of the present invention:

[0019] 1. The present invention removes sticky oil and metal dust from the surface of the zinc sulfide protective window through the synergistic effect of the scraping component driving the curved scraper for mechanical scraping, the cleaning component driving the detergent for chemical dissolution, and the air curtain component for instant drying with directional airflow, thereby preventing residual liquid film from interfering with the laser and infrared signal paths, and improving the detection accuracy and efficiency of the detection component.

[0020] 2. The present invention uses a temperature sensor to monitor heat accumulation on the protective window in real time, triggering a closed-loop cleaning-cooling cycle. The low-temperature airflow provided by the vortex tube can achieve rapid heat exchange with the zinc sulfide protective window to remove the heat accumulated on the surface of the zinc sulfide protective window, ensuring the thermal sensitivity stability of the infrared imaging module. At the same time, the detection component can be quickly put into detection work, further improving the detection efficiency of the detection machine.

[0021] 3. The present invention arranges the nozzle to realize dual-mode switching through an incomplete gear: during normal detection, a wide-angle air curtain blocks pollutants; in cleaning mode, a focused airflow is blown against the zinc sulfide protective window, quickly removing the heat accumulated on the surface of the zinc sulfide protective window and drying the residual moisture on the surface of the zinc sulfide protective window, effectively avoiding secondary interference caused by detergent residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the top structure of the hollow support seat in the present invention;

[0025] Figure 3 yes Figure 2 Cross-sectional view at point A;

[0026] Figure 4 It is a schematic diagram of the internal structure of the detection box of the present invention;

[0027] Figure 5 This is an exploded view of the positional relationship between the hollow support seat, the arc-shaped cleaning nozzle, and the arc-shaped scraper in the present invention;

[0028] Figure 6 This is a schematic diagram of the internal structure of the outer gear ring in the present invention;

[0029] Figure 7 Schematic diagram of the three-dimensional structure of the air curtain assembly of the present invention;

[0030] Figure 8 This is a schematic diagram of the positional relationship between the adjustment rack and the incomplete gear in the present invention;

[0031] Figure 9 This is an exploded view of the internal structure of the storage chute in the present invention;

[0032] The accompanying drawings are marked as follows: 1. pipe wall; 2. inner through hole; 3. pipeline robot; 4. zinc sulfide protection window; 5. cylindrical mounting platform; 6. nozzle; 7. hollow support seat; 8. arc-shaped cleaning nozzle; 9. arc-shaped scraper; 10. detection box; 11. infrared imaging module; 12. fiber laser; 13. beam splitter; 14. temperature sensor; 16. scraping chute; 17. moving rack; 18. transmission chute; 19. transmission slide; 20. transmission gear; 21. fixed rack; 22. main gear; 23. satellite gear; 24. transmission rod; 25. spiral Groove; 26. Ball head rod; 27. Motor; 28. Reducer; 29. ​​Fixed plate; 30. Fixed slide; 31. Adjustment rack; 32. Incomplete gear; 33. Annular air chamber; 34. Return spring; 35. Resistance wheel; 36. I-shaped pulley; 37. Triangular protrusion; 38. External gear ring; 39. Micro air compressor; 40. Filter; 41. Vortex tube; 42. Infusion tube; 43. Liquid storage tank; 44. Installation tank; 45. Water pump; 46. Storage slide; 47. Storage slider; 48. T-shaped guide rod; 49. Storage spring; 50. T-shaped positioning rod. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] A stainless steel pipe inner hole surface defect detection machine, wherein the stainless steel pipe is the object to be detected and its inner hole surface needs to be scanned for defects; the detection machine is a pipeline endoscopic optical detection device, which is specially used for non-destructive testing of the inner hole surface of the stainless steel pipe.

[0035] like Figure 1-Figure 5 As shown, the stainless steel pipe includes a pipe wall 1, and an inner through hole 2 is provided in the center of the pipe wall 1; the inner hole surface defect detection machine enters the inner through hole 2 axially along the pipe wall 1, and the inner hole surface defect detection machine includes symmetrically arranged pipeline robots 3, a zinc sulfide protection window 4 is provided between the two pipeline robots 3, a cylindrical mounting platform 5 is installed at one end of the zinc sulfide protection window 4, four nozzles 6 are evenly arranged on the side of the cylindrical mounting platform 5 facing the zinc sulfide protection window 4, the other end of the zinc sulfide protection window 4 is fixedly connected to a hollow support seat 7, four arc-shaped cleaning nozzles 8 are evenly provided on one side of the hollow support seat 7, the four arc-shaped cleaning nozzles 8 are arranged in a circular shape on the outer periphery of the zinc sulfide protection window 4, and a curved scraper 9 is fixedly connected to one end of the arc-shaped cleaning nozzle 8 facing the zinc sulfide protection window 4 and in contact with the outer surface of the zinc sulfide protection window 4;

[0036] A detection component is provided inside the zinc sulfide protection window 4, which is used to monitor the local temperature inside the zinc sulfide protection window 4 and the inner wall defects of the tube wall 1. A scraping component is provided inside the hollow support seat 7, which is used to drive the arc scraper 9 to move axially along the zinc sulfide protection window 4 to scrape the pollutants. An adjustment component is provided at one end of the zinc sulfide protection window 4, which is used to drive the nozzle head 6 to deflect toward the surface of the zinc sulfide protection window 4 to focus the airflow to blow against the zinc sulfide protection window 4. An air curtain component is provided inside the cylindrical mounting platform 5, which is used to provide compressed air to the nozzle head 6. A cleaning component is provided inside the hollow support seat 7, which is used to spray detergent in the forward direction of the arc scraper 9 to dissolve oil stains.

[0037] When in use, first, the pipeline robot 3 carries the detection machine into the through hole 2 in the stainless steel pipe, and the air curtain component blows a ring-shaped air curtain with a cone angle of 60° toward the periphery of the zinc sulfide protection window 4 through the nozzle 6 to blow away dust and other foreign matter that falls on the surface of the zinc sulfide protection window 4. Then, when the detection component senses that the temperature on the surface of the zinc sulfide protection window 4 is too high, which affects the data collection of the infrared imaging module 11, the scraping component is started to drive the arc scraper 9 to move in contact with the surface of the zinc sulfide protection window 4, and cooperates with the cleaning component to move the arc scraper through the arc cleaning nozzle 8. 9 sprays detergent in the forward direction to scrape off foreign matter adhered to the zinc sulfide protective window 4, and while driving the arc scraper 9 to move in contact with the surface of the zinc sulfide protective window 4, the adjustment component drives the nozzle 6 to deflect to the direction toward the surface of the zinc sulfide protective window 4, so as to focus the airflow to blow against the zinc sulfide protective window 4, quickly take away the heat accumulated on the surface of the zinc sulfide protective window 4, and dry the residual moisture on the surface of the zinc sulfide protective window 4, effectively avoiding secondary interference caused by detergent residue, thereby effectively improving the detection accuracy and detection efficiency of the detection component.

[0038] like Figure 2-Figure 4As shown, the detection assembly includes a detection box 10 rotatably connected to one end of the hollow support seat 7, and the detection box 10 is arranged inside the zinc sulfide protection window 4, four infrared imaging modules 11 are evenly fixedly connected to the outer periphery of the detection box 10, a fiber laser 12 is fixedly connected to the end of the detection box 10 away from the hollow support seat 7, a beam splitter 13 is fixedly connected to the output end of the fiber laser 12, and two temperature sensors 14 are symmetrically fixedly connected to the inner side of the zinc sulfide protection window 4.

[0039] During use, when the pipeline robot 3 carries the detection machine into the through hole 2 in the stainless steel pipe, the fiber laser 12 passes through the zinc sulfide protective window 4 through the beam splitter 13 to stimulate the pipe wall 1 and make the pipe wall 1 heat up. At the same time, the infrared imaging module 11 receives the thermal radiation signal from the inner surface of the pipe wall 1 to complete the detection of defects on the inner wall of the pipe wall 1. Then, when the symmetrically arranged temperature sensor 14 detects that the local temperature inside the zinc sulfide protective window 4 exceeds the preset threshold, it indicates that the contaminant is adhered to the surface of the zinc sulfide protective window 4, causing heat storage to interfere with the optical path. At this time, the scraping component will be triggered to start to automatically clean the stains adhered to the surface of the zinc sulfide protective window 4.

[0040] like Figure 2-Figure 6 As shown, the scraping assembly includes four scraping grooves 16 evenly arranged on the outer periphery of the hollow support seat 7, a movable rack 17 slidably connected to the inside of the scraping groove 16 and fixedly connected to the arc-shaped cleaning nozzle 8 at one end, four transmission grooves 18 evenly arranged on the outer periphery of the hollow support seat 7, a transmission slider 19 slidably connected to the inside of the transmission groove 18, a transmission gear 20 rotatably connected to one end of the transmission slider 19, and four fixed racks 21 evenly fixedly connected to the outer periphery of the hollow support seat 7, wherein the transmission gear 20 is arranged between the movable rack 17 and the fixed rack 21 and is synchronously meshed with the two; wherein the extension direction of the transmission groove 18 is parallel to the scraping groove 16, and the length of the movable rack 17 is greater than that of the fixed rack 200% of the stroke of the strip 21; and, the scraping assembly also includes a main gear 22 rotatably connected to the inside of the hollow support seat 7, four satellite gears 23 evenly arranged inside the hollow support seat 7, arranged in a circle and meshing with the main gear 22, a transmission rod 24 fixedly connected to one end of the satellite gear 23 and rotatably connected to the hollow support seat 7, a spiral groove 25 opened on the outer periphery of the transmission rod 24, a ball head rod 26 fixedly connected to the end of the transmission slider 19 away from the transmission gear 20, the ball head end of which is embedded in the spiral groove 25, a motor 27 fixedly connected to the inside of the hollow support seat 7, a reducer 28 fixedly connected to the output end of the motor 27, and the output end of the reducer 28 is coaxially fixed with the main gear 22.

[0041] During use, when the scraping assembly is triggered to start to automatically clean the stains stuck on the surface of the zinc sulfide protective window 4, the starting motor 27 drives the main gear 22 to rotate through the reducer 28, driving the four satellite gears 23 to rotate synchronously. The satellite gear 23 pushes the ball head rod 26 through the spiral groove 25 of the transmission rod 24, so that the transmission slider 19 moves along the transmission groove 18. The transmission gear 20 drives the arc scraper 9 to move axially along the zinc sulfide protective window 4 to scrape the pollutants under the meshing transmission of the movable rack 17 and the fixed rack 21. At the same time, the cleaning assembly is started. The transmission gear 20 is used in conjunction with the movable rack 17 and the fixed rack 21, so that the arc scraper 9 can move more than twice the moving stroke of the transmission gear 20 along the length direction of the transmission groove 18, thereby increasing the scraping range of the arc scraper 9.

[0042] like Figure 2-Figure 4 and Figure 7 、 Figure 8 As shown, the adjustment assembly includes a fixed plate 29 fixedly connected to one end of the cylindrical mounting platform 5 facing the zinc sulfide protection window 4, four fixed slide grooves 30 evenly provided at one end of the fixed plate 29, an adjustment rack 31 slidably connected to the inside of the fixed slide groove 30, four incomplete gears 32 evenly hinged to one side of the fixed plate 29 facing the zinc sulfide protection window 4 and fixedly connected to the nozzle 6 at one end, an annular air chamber 33 provided inside the fixed plate 29 and connected to the nozzle 6 through a pipe, a return spring 34 fixedly connected to one end of the adjustment rack 31 and provided inside the fixed slide groove 30; wherein, the adjustment assembly also includes a resistance wheel 35 rotatably connected to one end of the adjustment rack 31 , an I-shaped pulley 36 fixedly connected to the end of the beam splitter 13 and rotatably connected to the fixed plate 29, four triangular protrusions 37 uniformly fixedly connected to the outer periphery of the I-shaped pulley 36, whose inclined surfaces roll in contact with the contact wheel 35, an outer gear ring 38 fixedly connected to one end of the detection box 10 and meshing with the satellite gear 23; and, the air curtain assembly includes a micro air compressor 39 fixedly connected to the inside of the cylindrical mounting platform 5, a filter 40 fixedly connected to the air inlet of the micro air compressor 39, and the input end of which extends to the outside of the cylindrical mounting platform 5, and four vortex tubes 41 uniformly fixedly connected to the output end of the micro air compressor 39, and the output end is connected to the inside of the fixed plate 29.

[0043] When in use, first start the micro air compressor 39 to compress the filtered gas through the filter 40 and input it into the annular air chamber 33 through the vortex tube 41. Among them, the filter 40 adopts a multi-stage air filter with a precision of ≤0.3μm (such as SMC-AFM30-10-B type). Its input end is connected to the external air source, and the output end is connected to the air inlet of the micro air compressor 39. Then, the nozzle 6 is connected to the annular air chamber 33 through the pipeline, and the pressurized gas is guided to blow toward the periphery of the zinc sulfide protection window 4. Then, while driving the arc scraper 9 to move, The outer gear ring 38 drives the detection box 10 to rotate, and the I-shaped pulley 36 drives the triangular protrusion 37 to push the contact wheel 35, forcing the adjustment rack 31 to compress the return spring 34. The adjustment rack 31 drives the incomplete gear 32 to deflect 25°, so that the nozzle 6 switches from the initial 60° outward cone angle to a 15° inward inclination angle, and the airflow mode switches from an annular protective air curtain to high-speed wind close to the window. At the same time, the vortex tube 41 reduces the temperature of the pressurized gas generated by the micro air compressor 39, and makes the low-temperature airflow blow close to the surface of the zinc sulfide protective window 4, quickly taking away the accumulated heat and drying the residual detergent.

[0044] like Figure 2 and Figure 3 、 Figure 5 、 Figure 9 As shown, the cleaning component includes an infusion tube 42 fixedly connected to the input end of the arc-shaped cleaning nozzle 8, a liquid storage tank 43 and an installation tank 44 opened inside the hollow support seat 7, and a water pump 45 fixedly connected to the inside of the installation tank 44 and with its input end extending to the inside of the liquid storage tank 43; wherein, the cleaning component also includes four groups of storage slides 46 opened on the outer periphery of the hollow support seat 7, a storage slider 47 slidably connected to the inside of the storage slide 46, a T-shaped guide rod 48 fixedly connected to the top of the storage slider 47, a storage spring 49 fixedly connected to the inside of the storage slide 46 and one end connected to the storage slider 47, and a T-shaped positioning rod 50 evenly fixedly connected to the outer periphery of the hollow support seat 7, wherein the middle section of the infusion tube 42 is S-shaped and wraps around the outer periphery of the T-shaped guide rod 48.

[0045] During use, while driving the arc scraper 9 to move axially along the zinc sulfide protective window 4 to scrape the pollutants, the water pump 45 is started to pump the detergent in the liquid storage tank 43 into the arc cleaning nozzle 8 through the infusion tube 42, and spray it in the forward direction of the arc scraper 9 to dissolve the oil stains. At the same time, the middle section of the infusion tube 42 moves telescopically along the length direction of the storage slide 46 with the T-shaped guide rod 48, and the T-shaped guide rod 48 drives the storage slider 47 to squeeze the storage spring 49 to expand and contract, so as to drive the infusion tube 42 to be in a taut state between multiple T-shaped guide rods 48, thereby reducing the entanglement of the infusion tube 42. After cleaning is completed, the storage spring 49 pushes the T-shaped guide rod 48 to drive the infusion tube 42 to automatically reset.

[0046] The working principle of the inner hole surface defect detection machine of a stainless steel pipe provided by the present invention is as follows:

[0047] First, the pipeline robot 3 carries the detection machine into the through hole 2 in the stainless steel pipe, starts the micro air compressor 39 to compress the filtered gas through the filter 40, and inputs it into the interior of the annular air chamber 33 through the vortex tube 41. Then, the nozzle 6 is connected to the annular air chamber 33 through the pipeline, and blows an annular air curtain with a cone angle of 60° to the periphery of the zinc sulfide protection window 4 to blow away dust and other foreign matter that falls on the surface of the zinc sulfide protection window 4; then, the fiber laser 12 excites the pipe wall 1 through the zinc sulfide protection window 4 through the beam splitter 13, causing the pipe wall 1 to heat up, and at the same time, the infrared imaging module 11 receives the thermal radiation signal from the inner surface of the pipe wall 1 to complete the detection of defects on the inner wall of the pipe wall 1. At the same time, when the symmetrically arranged temperature sensor 14 detects that the local temperature inside the zinc sulfide protection window 4 exceeds the preset threshold, it indicates that the contaminant is adhered to the surface of the zinc sulfide protection window 4, causing heat storage to interfere with the optical path;

[0048] At this time, the motor 27 is started to drive the main gear 22 to rotate through the reducer 28, driving the four satellite gears 23 to rotate synchronously. The satellite gear 23 pushes the ball head rod 26 through the spiral groove 25 of the transmission rod 24, so that the transmission slider 19 moves along the transmission slide 18. The transmission gear 20 is meshed with the movable rack 17 and the fixed rack 21, driving the arc scraper 9 to move axially along the zinc sulfide protection window 4 to scrape the pollutants; at the same time, the water pump 45 is started to pump the detergent in the liquid storage tank 43 into the arc cleaning nozzle 8 through the infusion pipe 42, spraying the dissolved oil in the forward direction of the arc scraper 9. At the same time, the middle section of the infusion pipe 42 is extended and retracted along the length direction of the storage slide 46 along the T-shaped guide rod 48, and the T-shaped guide rod 48 drives the storage slider 47 to squeeze the storage spring 49 to extend and retract, so as to drive the infusion pipe 42 to be in a taut state between the multiple T-shaped guide rods 48, thereby reducing the entanglement of the infusion pipe 42;

[0049] While driving the arc scraper 9 to move, the outer gear ring 38 drives the detection box 10 to rotate, and the I-shaped wheel 36 drives the triangular protrusion 37 to push the contact wheel 35, forcing the adjustment rack 31 to compress the return spring 34. The adjustment rack 31 drives the incomplete gear 32 to deflect 25°, so that the nozzle 6 switches from the initial 60° outward cone angle to a 15° inward inclination angle, and the airflow mode switches from an annular protective air curtain to a high-speed wind close to the window. At the same time, the vortex tube 41 reduces the temperature of the pressurized gas generated by the micro air compressor 39, and makes the low-temperature airflow blow close to the surface of the zinc sulfide protective window 4, quickly taking away the accumulated heat and drying the residual detergent.

[0050] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A stainless steel pipe inner hole surface defect detection machine, characterized by: The stainless steel tube comprises a tube wall (1), and an inner through hole (2) is provided at the center of the tube wall (1); The inner hole surface defect detection machine enters the interior of the inner through hole (2) along the axial direction of the pipe wall (1), and the inner hole surface defect detection machine comprises symmetrically arranged pipeline robots (3), a zinc sulfide protection window (4) arranged between two pipeline robots (3), a cylindrical mounting platform (5) mounted on one end of the zinc sulfide protection window (4), four spray nozzles (6) evenly arranged on the side of the cylindrical mounting platform (5) facing the zinc sulfide protection window (4), a hollow support seat (7) fixedly connected to the other end of the zinc sulfide protection window (4), four arc-shaped cleaning nozzles (8) evenly arranged on one side of the hollow support seat (7) and arranged in a circular shape on the outer periphery of the zinc sulfide protection window (4), and an arc-shaped scraper (9) fixedly connected to one end of the arc-shaped cleaning nozzle (8) facing the zinc sulfide protection window (4) and in contact with the outer surface of the zinc sulfide protection window (4); A detection component is provided inside the zinc sulfide protection window (4), a scraping component is provided inside the hollow support seat (7), an adjustment component is provided at one end of the zinc sulfide protection window (4), an air curtain component is provided inside the cylindrical mounting platform (5), and a cleaning component is provided inside the hollow support seat (7).

2. The inner hole surface defect detection machine according to claim 1, characterized in that: The detection assembly comprises a detection box (10) rotatably connected to one end of the hollow support seat (7), the detection box (10) being arranged inside the zinc sulfide protection window (4), four infrared imaging modules (11) uniformly fixedly connected to the periphery of the detection box (10), a fiber laser (12) fixedly connected to one end of the detection box (10) away from the hollow support seat (7), a beam splitter (13) fixedly connected to the output end of the fiber laser (12), and two temperature sensors (14) symmetrically fixedly connected to the inner side of the zinc sulfide protection window (4).

3. The inner hole surface defect detection machine according to claim 1, characterized in that: The scraping assembly comprises four scraping chutes (16) uniformly arranged on the outer periphery of the hollow support seat (7), a movable rack (17) slidably connected to the interior of the scraping chutes (16) and fixedly connected to the arc-shaped cleaning nozzle (8) at one end, four transmission chutes (18) uniformly arranged on the outer periphery of the hollow support seat (7), a transmission slider (19) slidably connected to the interior of the transmission chutes (18), a transmission gear (20) rotatably connected to one end of the transmission slider (19), and four fixed racks (21) uniformly fixedly connected to the outer periphery of the hollow support seat (7), wherein the transmission gear (20) is arranged between the movable rack (17) and the fixed rack (21) and is synchronously meshed with the two.

4. The inner hole surface defect detection machine according to claim 3, characterized in that: The extension direction of the transmission chute (18) is parallel to the scraping chute (16), and the length of the movable rack (17) is greater than 200% of the stroke of the fixed rack (21).

5. The inner hole surface defect detection machine according to claim 3, characterized in that: The scraping assembly further comprises a main gear (22) rotatably connected to the interior of the hollow support seat (7), four satellite gears (23) uniformly arranged in a circular pattern inside the hollow support seat (7) and meshing with the main gear (22), a transmission rod (24) fixedly connected to one end of the satellite gears (23) and rotatably connected to the hollow support seat (7), a spiral groove (25) provided on the outer periphery of the transmission rod (24), a ball head rod (26) fixedly connected to the end of the transmission slider (19) away from the transmission gear (20), the ball head end of the ball head rod being embedded in the spiral groove (25), a motor (27) fixedly connected to the interior of the hollow support seat (7), and a reducer (28) fixedly connected to the output end of the motor (27), wherein the output end of the reducer (28) is coaxially fixedly connected to the main gear (22).

6. The inner hole surface defect detection machine according to claim 1, characterized in that: The adjustment assembly includes a fixed plate (29) fixedly connected to one end of the cylindrical mounting platform (5) facing the zinc sulfide protection window (4), four fixed sliding grooves (30) evenly arranged at one end of the fixed plate (29), an adjustment rack (31) slidably connected to the inside of the fixed sliding groove (30), four incomplete gears (32) evenly hinged to one side of the fixed plate (29) facing the zinc sulfide protection window (4) and fixedly connected to the nozzle (6) at one end, an annular air chamber (33) opened inside the fixed plate (29) and connected to the nozzle (6) through a pipeline, and a return spring (34) fixedly connected to one end of the adjustment rack (31) and arranged inside the fixed sliding groove (30).

7. The inner hole surface defect detection machine according to claim 2, characterized in that: The adjustment assembly further includes a contact wheel (35) rotatably connected to one end of the adjustment rack (31), an I-shaped wheel disc (36) fixedly connected to the end of the beam splitter (13) and passing through the fixed plate (29) for rotational connection therewith, four triangular protrusions (37) uniformly fixedly connected to the outer periphery of the I-shaped wheel disc (36) and having inclined surfaces that roll against the contact wheel (35), and an outer gear ring (38) fixedly connected to one end of the detection box (10) and meshing with the satellite gear (23).

8. The inner hole surface defect detection machine according to claim 1, characterized in that: The air curtain assembly includes a micro air compressor (39) fixedly connected to the inside of the cylindrical mounting platform (5), a filter (40) fixedly connected to the air inlet of the micro air compressor (39) and with the input end extending to the outside of the cylindrical mounting platform (5), and four vortex tubes (41) evenly fixedly connected to the output end of the micro air compressor (39) and with the output end communicating with the inside of the fixed plate (29).

9. The inner hole surface defect detection machine according to claim 1, characterized in that: The cleaning assembly comprises a liquid infusion tube (42) fixedly connected to the input end of the arc-shaped cleaning nozzle (8), a liquid storage tank (43) and an installation tank (44) provided inside the hollow support seat (7), and a water pump (45) fixedly connected to the inside of the installation tank (44) and with its input end extending to the inside of the liquid storage tank (43).

10. The inner hole surface defect detection machine according to claim 9, characterized in that: The cleaning assembly further comprises four groups of receiving chutes (46) provided on the outer periphery of the hollow support seat (7), a receiving slider (47) slidably connected to the inside of the receiving chutes (46), a T-shaped guide rod (48) fixedly connected to the top of the receiving slider (47), a receiving spring (49) fixedly connected to the inside of the receiving chutes (46) and connected to the receiving slider (47) at one end, and a T-shaped positioning rod (50) uniformly fixedly connected to the outer periphery of the hollow support seat (7), wherein the middle section of the infusion tube (42) is S-shaped and passes around the outer periphery of the T-shaped guide rod (48).

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