Elastic corrugated pipe internal flaw detection equipment based on visual detection and detection method

Abstract

The invention discloses an elastic corrugated pipe internal flaw detection device and method based on visual detection, and belongs to the technical field of elastic corrugated pipe flaw detection. The elastic corrugated pipe internal flaw detection equipment comprises an outer frame, a movable block is transversely arranged in the outer frame, ultrasonic detectors are arranged at the two ends of the movable block, a camera is arranged at one end of each ultrasonic detector, and a movable rail is arranged in the middle of the outer frame in a surrounding mode. The device solves the problem that in the trace detection process of an existing pipeline ultrasonic detection device, foreign matter detained in a concave position can affect the accuracy of flaw detection in the elastic corrugated pipe, the first rolling wheel drives the flaw detection device in the elastic corrugated pipe to transversely move, and in the moving process, a camera shoots pictures, so that the accuracy of flaw detection in the elastic corrugated pipe is improved. The cleaning brush can extend to rub the position to be cleaned, efficient cleaning can be achieved by matching with liquid sprayed by the spray head, and the cleaning position can be air-dried through the fan.

Description

Technical Field

[0001] The present invention relates to the technical field of elastic bellows flaw detection, and in particular to an internal flaw detection device and a detection method for elastic bellows based on visual detection. Background Technique

[0002] An internal flaw detection device for elastic bellows is a device specifically used to detect internal defects of elastic bellows, which can non-destructively detect problems such as cracks, corrosion, and deformation inside the bellows. This device can penetrate into the inside of the bellows, collect data and images in real time and transmit them to the control unit for processing. The data analysis software analyzes the collected signals to generate a detailed detection report to help operators accurately judge the state of the bellows. This device ensures the safety and reliability of the bellows.

[0003] Chinese Patent with Publication No. CN215066346U discloses a boiler pipe ultrasonic detection device, including a machine body. One end of the machine body is rotatably connected to a detection frame. Four moving frames are evenly arranged at equal intervals around the machine body. A driving frame is fixedly installed at the bottom of the machine body. The length of the four moving frames can be adjusted through an adjusting frame, which is beneficial for the machine body to move and monitor inside pipes of any size. The engagement between the rotating shaft end of the first motor in the detection frame and the gear enables the shell to rotate on the annular groove, so as to change the angle of the ultrasonic detector, thereby enabling the pipe to be detected in all directions, and the detection is more sufficient and comprehensive.

[0004] During the trace detection process of the above-mentioned patent's pipe ultrasonic detection device, since the detected pipe has been used for a long time, and there are recessed positions with uniform lateral distribution inside the bellows, foreign objects will penetrate into the recessed positions during use, and the foreign objects staying in the recessed positions will affect the accuracy of the internal flaw detection of the elastic bellows. Moreover, the device does not have a reserved cleaning structure, resulting in a reduction in the internal flaw detection effect of the elastic bellows. Summary of the Invention

[0005] The purpose of the present invention is to provide an internal flaw detection device and a detection method for elastic bellows based on visual detection. The elastic bellows internal flaw detection device is driven by a first roller to move horizontally. During the movement, the camera takes pictures. The cleaning brush can extend to rub the position to be cleaned, and the liquid sprayed by the spray head can be used for efficient cleaning. Before the trace detection by the ultrasonic detector, the sprayed liquid can be dried by a fan at the cleaning position, solving the problems raised in the above background technique.

[0006] To achieve the above object, the present invention provides the following technical solution: An internal flaw detection device for elastic corrugated pipes based on visual detection, including an outer frame. Inside the outer frame, a movable block is horizontally arranged. At both ends of the movable block, ultrasonic detectors are provided. At one end of each ultrasonic detector, a camera is provided. An activity track is arranged around the middle of the outer frame. On one side of the outside of the outer frame, a sliding block is provided. At one end of the sliding block, a cleaning brush is connected through a third hydraulic rod. At the lower end of the sliding block, an extension plate extends. Inside the extension plate, a fan is provided. Horizontally arranged at the lower end of the outside of the outer frame are a pair of dividing pieces. The activity track is provided with four nozzles, and the four nozzles correspond to four orientations. When cleaning is required in the corresponding orientation, the liquid for cleaning can be sprayed by the nozzle at the nearest position to complete the cleaning.

[0007] Preferably, the pair of dividing pieces are respectively located on both sides of the cleaning brush. On both sides of the upper end of the dividing pieces, second hydraulic rods are provided. By extending the second hydraulic rods, the dividing pieces can be pushed to move vertically downward. The dividing pieces are used to guide the sprayed liquid and air flow, preventing the liquid from flowing randomly and gathering the gas, so that the gas can flow efficiently around the cleaning position.

[0008] Preferably, on the side of the outside of the second hydraulic rod facing the outer frame, a fourth hydraulic rod is horizontally arranged, and the outer frame, the fourth hydraulic rod, and the second hydraulic rod are sequentially fixedly connected by bolts. By driving the fourth hydraulic rod, the position of the dividing pieces can be adjusted horizontally, enabling the dividing pieces to adapt to the concave positions of different pipes.

[0009] Preferably, the sliding block is embedded inside the activity track and is slidably connected to the inside of the activity track. On both sides of the part of the sliding block embedded in the activity track, rotatable second rollers are provided. The second rollers can avoid the friction and noise generated when the sliding block slides, and improve the smoothness of the sliding of the sliding block.

[0010] Preferably, on one side of the outside of the nozzle, a bracket is provided. The bracket can be used to erect and support the nozzle, and can also fix the adjusted orientation of the nozzle, facilitating the discharge of the subsequent cleaning liquid.

[0011] Preferably, on one side of the bracket, a water tank is provided, and on the other side of the bracket, a pump is provided. The water tank, the pump, and the nozzle are sequentially hermetically connected by a water pipe. The pump can extract the stored liquid, causing the liquid to be sprayed from the nozzle position.

[0012] Preferably, the water pipe connecting the pump and the nozzle passes through the bracket. During the process of the bracket fixing the discharge of the liquid from the nozzle, the bracket will not affect the transmission of the liquid, and the liquid will be sprayed from the nozzle under the support of the bracket.

[0013] Preferably, a heating wire is arranged at the air outlet position of the fan, which increases the temperature and dryness of the discharged gas, and improves the drying speed after pipeline cleaning by increasing the dryness of the gas during flow.

[0014] Preferably, an activity cavity is arranged through the interior of the outer frame. The movable block is located inside the activity cavity. Three limiting rods and one threaded rod are arranged around the activity cavity. The three limiting rods and one threaded rod are respectively located at the four corner positions inside the activity cavity. A transmission ring is arranged around the outside of the movable block, and the four corner positions of the transmission ring respectively penetrate through the threaded rod and the limiting rod at the four corner positions. The outside of the limiting rod is slidably connected to the penetrating position of the transmission ring, and the outside of the threaded rod is in threaded cooperation with the penetrating position of the transmission ring. The reserved activity cavity facilitates the lateral movement of the camera and the ultrasonic detector, improving the detection range.

[0015] The detection method of the internal flaw detection device of the elastic corrugated pipe based on visual detection includes the following steps:

[0016] Step 1: Start the first hydraulic rods at the four corner positions of the outer frame, and the first hydraulic rods at the four corner positions synchronously extend to push the outer frame;

[0017] Step 2: The output shaft of the first motor drives the gear to rotate. The gear drives the movable block inside the transmission ring to rotate through the tooth grooves. The rotation of the movable block drives the ultrasonic detector and the camera to rotate;

[0018] Step 3: The camera is started to capture the internal image of the corrugated pipe and transmit the image to the display screen. The user first visually observes whether the inner wall of the pipe is damaged through the display screen;

[0019] Step 4: The pump extracts the liquid inside the water tank and sprays the liquid from the nozzle position;

[0020] Step 5: Start the third hydraulic rod to push the cleaning brush, so that the cleaning brush contacts the wetted position to be cleaned. The second roller rotates in the activity track, which can make the cleaning brush slide along the activity track;

[0021] Step 6: Start the second hydraulic rod and push the dividing piece to move vertically downward. A pair of dividing pieces respectively contact the inner walls of the elastic corrugated pipes on both sides of the cleaning position. The air flow generated by the fan blows the wet position;

[0022] Step 7: Start the heating wire to increase the temperature of the gas blown by the fan. With the restriction of a pair of dividing pieces on the gas, the high-temperature gas quickly flows around the outer frame position and efficiently and repeatedly contacts the wet position;

[0023] Step 8: Start the ultrasonic detector to detect the internal defects, perform trace detection, and be able to locate and quantitatively analyze the defects.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. After the camera of the present invention observes that there are foreign matters hindering trace detection remaining on the inner wall of the elastic corrugated pipe, dust and particulate matters can directly start the fan to blow, and the foreign matters adhered to the inner wall of the elastic corrugated pipe will be wetted by the liquid sprayed from the nozzle position and then removed by the contact and friction of the cleaning brush before being blown by the fan. The foreign matters are actively separated from the original position, and when the fan blows the wet position, the heating wire is energized to increase the temperature of the blown gas, so that the wet position after cleaning can be quickly dried. The rapid drying can improve the detection efficiency of trace detection, avoid the pipe being relatively wet after trace detection, and also avoid the wet position affecting the accuracy of trace detection.

[0026] 2. When the present invention sprays liquid to wet the elastic corrugated pipe and the cleaning brush scrapes the elastic corrugated pipe, the elongation of the second hydraulic rod can push the dividing piece to move longitudinally downward, so that the lower end of the dividing piece is embedded in the concave position inside the elastic corrugated pipe. A pair of dividing pieces are respectively located on both sides of the cleaning position of the cleaning brush. First of all, a pair of dividing pieces can improve the stability during cleaning and avoid the lateral position deviation of the equipment caused by friction. Secondly, a pair of dividing pieces can provide a stable air flow track, which is convenient for the heated gas to quickly circulate and flow around the outer frame, so that the high-temperature gas can quickly and repeatedly contact the wet position. Finally, by restricting both sides of the cleaning position with a pair of dividing pieces, it is possible to avoid the liquid flowing to both sides of the cleaning position and prevent the inside of the pipe from being too wet. Description of the Drawings

[0027] Figure 1 is a schematic diagram of the overall external structure of the present invention;

[0028] Figure 2 is of the present invention Figure 1 local enlarged view of area A therein;

[0029] Figure 3 is of the present invention Figure 1 local enlarged view of area B therein;

[0030] Figure 4 is a schematic diagram of the positional relationship of the second roller of the present invention;

[0031] Figure 5 is a schematic diagram of the gas flow track of the present invention;

[0032] Figure 6 is a schematic diagram of the positional relationship of the movable cavity of the present invention;

[0033] Figure 7 is of the present invention Figure 6 local enlarged view of area C therein.

[0034] In the figure: 1. Outer frame; 2. Movable cavity; 3. First roller; 4. First hydraulic rod; 5. Movable block; 6. Ultrasonic detector; 7. Camera; 8. Segmentation piece; 9. Second hydraulic rod; 10. First motor; 11. Movable track; 12. Sliding block; 13. Cleaning brush; 14. Water tank; 15. Pump; 16. Nozzle; 17. Bracket; 18. Second motor; 19. Extension plate; 20. Fan; 21. Heating wire; 22. Third hydraulic rod; 23. Fourth hydraulic rod; 24. Second roller; 25. Gear; 26. Transmission ring; 27. Tooth groove; 28. Threaded rod; 29. Limiting rod. Specific implementation mode

[0035] The present invention will be further described below in conjunction with specific embodiments.

[0036] Embodiment 1: As Figure 1 shown, this embodiment is an internal flaw detection device and detection method for elastic bellows based on visual detection, including an outer frame 1. A movable block 5 is horizontally arranged inside the outer frame 1. Ultrasonic detectors 6 are arranged at both ends of the movable block 5. The ultrasonic detector 6 utilizes the propagation characteristics of ultrasonic waves in an object. When ultrasonic waves encounter defects, phenomena such as reflection, refraction, and scattering will occur. By receiving and analyzing these reflected wave signals, the presence and characteristics of defects can be judged. For elastic bellows, ultrasonic detection can detect internal defects, trace detection, and can also perform positioning and quantitative analysis of defects;

[0037] Referring to the Chinese patent "A Boiler Pipeline Ultrasonic Detection Device" with the authorized announcement number CN215066346U, in this application, detection is carried out through an ultrasonic detector. This application is prior art for the present application, and it is common knowledge to detect the condition of the inner wall of the pipeline through ultrasonic waves. The present application does not make an invention and creation on the method of the ultrasonic detector emitting ultrasonic waves to detect the inside of the pipeline. Therefore, in the present application, not too much description is given to the part of the ultrasonic detector 6;

[0038] In order to facilitate the user to timely understand the internal condition of the pipeline and directly observe the appearance inside the pipeline, a camera 7 for shooting is arranged at one end of the ultrasonic detector 6. The activation of the camera 7 can directly shoot the picture in the detection direction of the ultrasonic detector 6, or the internal condition of the pipeline can be directly observed with the naked eye through the shooting of the camera 7;

[0039] Inside the movable block 5, there are an encoder, a wireless module, and an antenna for transmitting images. Among them, the original video data captured by the camera 7 is large in volume. The encoder compresses the data to reduce the transmission bandwidth requirement. The wireless module, combined with the antenna, can transmit the encoder data, enabling the user to play the video through a receiving device with an antenna and a receiving-end decoder outside the pipeline, improving the inspection effect and efficiency of the pipeline;

[0040] Referring to the Chinese patent "A Wireless Intelligent Video Surveillance Camera" with the authorized announcement number CN214381076U, in this application, the recording function of the surveillance video can be achieved through the video recording controller, and the recording can be completed at the camera end. It can be adjusted to any time period for repeated playback and viewing, improving the convenience of use. This application is prior art relative to the present application, and the present application does not make any inventive improvements to the wireless video transmission function. Therefore, there is no excessive elaboration on the shooting and transmission of the video by the camera 7, nor on the encoder, wireless module, antenna, receiving-end decoder, receiving device, and receiving antenna during the transmission process;

[0041] In order to clean the foreign objects inside the elastic corrugated pipe, a movable track 11 is provided in a middle surrounding and concave manner inside the outer frame 1. A sliding block 12 is provided on one side of the outside of the outer frame 1, and the sliding block 12 is embedded inside the movable track 11 and is slidably connected to the inside of the movable track 11. Through the reserved track of the movable track 11, the sliding block 12 can surround and face any position and orientation that needs to be cleaned;

[0042] Among them, rotatable second rollers 24 are provided on both sides of the part of the sliding block 12 embedded in the movable track 11. As Figure 4 shown, the second rollers 24 are rotatably connected to the inside of the sliding block 12 and are in contact with the inner wall of the outer frame 1. After being driven to rotate, the second rollers 24 can drive the sliding block 12 to slide along the movable track 11. By rotating the second rollers 24, power can be provided and the position of the sliding block 12 can be adjusted. A servo motor connected to the second rollers 24 is provided inside the sliding block 12. Through the output of the servo motor, the second rollers 24 can be rotated. Driving an object to rotate by a servo motor is common knowledge, so there is no excessive elaboration in the present application;

[0043] One end of the sliding block 12 is provided with a third hydraulic rod 22, and one end of the third hydraulic rod 22 is provided with a cleaning brush 13. The movement of the sliding block 12 can adjust the orientation of the cleaning brush 13, and the extension of the third hydraulic rod 22 can push the cleaning brush 13 to contact the position to be cleaned. After contacting the position to be cleaned, friction can be achieved by the sliding of the sliding block 12 inside the movable track 11, improving the cleaning effect;

[0044] In order to wet the position to be cleaned, improve the cleaning efficiency, and meet different cleaning requirements, four nozzles 16 are arranged around one side of the movable rail 11. The four nozzles 16 correspond to four orientations. The four circumferentially distributed nozzles 16 can realize the spraying of liquid at different positions inside the whole pipeline. A bracket 17 is arranged on one side outside the nozzle 16;

[0045] Wherein, a water tank 14 is arranged on one side of the bracket 17, and a pump 15 is arranged on the other side of the bracket 17. The water tank 14, the pump 15 and the nozzle 16 are sequentially and hermetically connected through a water pipe. The water pipe connected between the pump 15 and the nozzle 16 passes through the bracket 17. When the second motor 18 drives the bracket 17 to rotate, it will drive the connected pipeline and the nozzle 16 to adjust the angle;

[0046] In order to quickly dry the inside of the wet pipeline and avoid the influence of moisture on the detection effect and visual observation effect, an extension plate 19 is arranged at the lower end of the sliding block 12. A fan 20 is arranged inside the extension plate 19. The start of the fan 20 can generate air flow, so that the air quickly contacts the cleaning position of the upper cleaning brush 13;

[0047] Among them, as Figure 2 shown, a heating wire 21 is arranged at the air outlet position of the fan 20. The heating wire 21 generates heat when energized, which can make the gas transmitted by the fan 20 become dry and high-temperature, and improve the drying effect of the pipeline cleaning position;

[0048] In order to prevent the liquid from flowing randomly during cleaning and also to improve the heat convergence effect generated by the heating wire 21, as Figure 5 shown, a pair of dividing pieces 8 are arranged horizontally at the lower end outside the outer frame 1. The pair of dividing pieces 8 are respectively located on both sides of the cleaning brush 13. Second hydraulic rods 9 are arranged on both sides of the upper end of the dividing piece 8. By extending the second hydraulic rods 9, the dividing pieces 8 can be pushed to move vertically downward and embed into the recessed positions inside the elastic corrugated pipe. The pair of dividing pieces 8 can prevent the liquid sprayed from the nozzle 16 position from flowing randomly inside the elastic corrugated pipe, and the pair of dividing pieces 8 can also guide the gas discharged by the fan 20, so that the gas can flow efficiently around the outer frame 1, so that the high-temperature dry gas repeatedly and efficiently contacts the wet cleaning position, avoiding heat loss and improving the detection efficiency;

[0049] In order to make the dividing piece 8 adapt to the recessed positions inside different elastic corrugated pipes and avoid damage to the elastic corrugated pipe caused by the vertical movement of the dividing piece 8, as Figure 3As shown, a fourth hydraulic rod 23 is horizontally arranged on the outer side of the second hydraulic rod 9 facing the outer frame 1, and the outer frame 1, the fourth hydraulic rod 23, and the second hydraulic rod 9 are sequentially fixedly connected by bolts. Through sequential connection, first, the dividing piece 8 can be continuously suspended outside the internal flaw detection equipment of the elastic corrugated pipe after contraction and reset. Second, the horizontal position and the final falling position of the dividing piece 8 can be adjusted by the extension of the fourth hydraulic rod 23, so that the dividing piece 8 can stably embed into the sunken position inside the elastic corrugated pipe;

[0050] In order to avoid that in some areas of the two ends of the elastic corrugated pipe, due to the thickness of the internal flaw detection equipment of the elastic corrugated pipe itself and the fixation of the ultrasonic detector 6 and the camera 7, a part of the area cannot be detected, an activity cavity 2 is penetrated and arranged inside the outer frame 1. An activity block 5 is located inside the activity cavity 2. Three limiting rods 29 and a threaded rod 28 are arranged around the activity cavity 2. The three limiting rods 29 and the threaded rod 28 are respectively located at the four corners inside the activity cavity 2. Relative movement can be generated with the contact position by the rotation of the threaded rod 28, and after the threaded rod 28 rotates, it is restricted by the limiting rod 29;

[0051] Among them, a transmission ring 26 is arranged around the outside of the activity block 5, and the four corners of the transmission ring 26 respectively penetrate the threaded rod 28 and the limiting rod 29 at the four corners. The outside of the limiting rod 29 is slidably connected with the penetrating position of the transmission ring 26, the outside of the threaded rod 28 is in threaded cooperation with the penetrating position of the transmission ring 26, and the outside of the activity block 5 is rotatably connected with the inside of the transmission ring 26. When the threaded rod 28 rotates to make the transmission ring 26 and the activity block 5 move horizontally, the activity block 5 can be rotated by driving;

[0052] In addition, a tooth groove 27 is arranged on one side of the outside of the transmission ring 26, and the tooth groove 27 is fixedly welded to the outer wall of the activity block 5. As Figure 6 and Figure 7 shown, a gear 25 is arranged on one side of the outside of the tooth groove 27, and the outside of the gear 25 is meshed with the tooth groove 27. After the gear 25 rotates, the activity block 5 can be driven by the tooth groove 27 to rotate inside the transmission ring 26. The ultrasonic detector 6 and the camera 7 at both ends of the activity block 5 can be used alternately, so that the two ends of the elastic corrugated pipe can be photographed and detected, and there is no need to adjust the orientation of the entire internal flaw detection equipment of the elastic corrugated pipe due to adjusting the orientation of the ultrasonic detector 6 and the camera 7, improving the detection effect of the elastic corrugated pipe;

[0053] In order to output the gear 25, a first motor 10 is arranged at one end of the gear 25, and the outside of the first motor 10 is fixedly connected to the outside of the transmission ring 26 by bolts. After the first motor 10 outputs and makes the gear 25 rotate, the first motor 10 will move horizontally together with the transmission ring 26;

[0054] In order to drive the outer frame 1 and the entire internal flaw detection device of the elastic corrugated pipe and make it move horizontally, first rollers 3 are provided at the four corner positions of the outer frame 1. A first hydraulic rod 4 is arranged between the first roller 3 and the outer wall of the outer frame 1, and both ends of the first hydraulic rod 4 are fixedly connected to the first roller 3 and the outer wall of the outer frame 1 through bolts. The rotation of the first roller 3 can make the internal flaw detection device of the elastic corrugated pipe move horizontally;

[0055] Example 2: As Figure 2 shown, a second motor 18 is provided at one end of the bracket 17. The bracket 17 that can be rotated by the drive of the second motor 18 adjusts the orientation of the nozzle 16, so that the liquid sprayed by the nozzle 16 can accurately reach the required position.

[0056] Working principle: Place the outer frame 1 inside the elastic corrugated pipe. Start the first hydraulic rods 4 at the four corners of the outer frame 1. The first hydraulic rods 4 at the four corners extend synchronously to push the outer frame 1, so that the outer frame 1 is fixed at the center position of the elastic corrugated pipe. The output shaft of the first motor 10 drives the gear 25 to rotate. The gear 25 drives the movable block 5 inside the transmission ring 26 to rotate through the tooth grooves 27. The rotation of the movable block 5 drives the ultrasonic detector 6 and the camera 7 to rotate. The ultrasonic detector 6 and the camera 7 keep rotating as the device moves horizontally. The camera 7 is started to capture the internal image of the corrugated pipe, and the image is transmitted to the encoder inside the movable block 5 to be converted into encoded data. The encoded data is modulated into a radio frequency signal through the wireless module and transmitted through the antenna. The user of the internal flaw detection device of the elastic corrugated pipe captures the radio frequency signal through the antenna of the receiving device, demodulates it into a digital data stream, and the data stream is transmitted to the receiving decoder to restore the compressed data to a video stream and output it to the display screen. The user first visually observes whether the inner wall of the pipe is damaged. When it is found that the inside of the pipe needs to be cleaned, start the pump 15 at the corresponding position. The pump 15 extracts the liquid inside the water tank 14 and sprays the liquid from the nozzle 16. After the cleaning liquid wets the position to be cleaned, adjust the position through the first roller 3 so that the cleaning brush 13 approaches and aligns with the position to be cleaned. Start the third hydraulic rod 22 to push the cleaning brush 13 so that the cleaning brush 13 contacts the wetted position to be cleaned. The second roller 24 rotates in the movable track 11, which can make the cleaning brush 13 slide along the movable track 11 to frictionally clean the position to be cleaned. Start the second hydraulic rod 9 and push the splitting piece 8 to move longitudinally downward. A pair of splitting pieces 8 respectively contact the inner walls of the elastic corrugated pipe on both sides of the cleaning position. After the cleaning brush 13 frictionally cleans and finishes, the third hydraulic rod 22 contracts and resets. Start the fan 20. The air flow generated by the fan 20 blows the wet position. Start the heating wire 21 to increase the temperature of the gas blown by the fan 20. With the restriction of the pair of splitting pieces 8 on the gas, the high-temperature gas quickly flows around the outer frame 1 and efficiently and repeatedly contacts the wet position, so that the cleaning position returns to dryness. For the position that cannot be carefully observed by the camera 7, start the ultrasonic detector 6. The ultrasonic detector 6 utilizes the propagation characteristics of ultrasonic waves in objects. When ultrasonic waves encounter defects, phenomena such as reflection, refraction, and scattering will occur. By receiving and analyzing these reflected wave signals, the presence and characteristics of defects can be judged. For the elastic corrugated pipe, ultrasonic detection can detect the internal defects and can perform positioning and quantitative analysis on the defects.

[0057] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0058] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An elastic bellows internal flaw detection device based on visual detection comprises an outer frame (1), characterized in that: A movable block (5) is transversely arranged inside the outer frame (1), and ultrasonic detectors (6) are arranged at both ends of the movable block (5). A camera (7) is arranged at one end of the ultrasonic detector (6). A movable rail (11) is arranged around the middle of the outer frame (1). A sliding block (12) is arranged on one side of the outer frame (1), and a cleaning brush (13) connected via a third hydraulic rod (22) is arranged at one end of the sliding block (12). An extension plate (19) is extended from the lower end of the sliding block (12), and a fan (20) is arranged inside the extension plate (19). A pair of split plates (8) are transversely arranged at the lower end of the outer frame (1), and four nozzles (16) are arranged on the movable rail (11).

2. The elastic bellows internal flaw detection device based on visual detection according to claim 1 is characterized in that: A pair of split pieces (8) are respectively located on both sides of the cleaning brush (13), and second hydraulic rods (9) are provided on both sides of the upper ends of the split pieces (8).

3. The elastic bellows internal flaw detection device based on visual detection according to claim 2 is characterized in that: A fourth hydraulic rod (23) is transversely arranged on the outside of the second hydraulic rod (9) facing the outer frame (1), and the outer frame (1), the fourth hydraulic rod (23) and the second hydraulic rod (9) are fixedly connected in sequence by bolts.

4. The elastic bellows internal flaw detection device based on visual detection according to claim 1 is characterized in that: The sliding block (12) is embedded in the movable rail (11) and is slidably connected to the inside of the movable rail (11). Rotatable second rollers (24) are provided on both sides of the portion of the sliding block (12) embedded in the movable rail (11).

5. The elastic bellows internal flaw detection device based on visual detection according to claim 4 is characterized in that: A bracket (17) is provided on one side of the outside of the spray head (16).

6. The elastic bellows internal flaw detection device based on visual detection according to claim 5 is characterized in that: A water tank (14) is disposed on one side of the bracket (17), and a pump (15) is disposed on the other side of the bracket (17); the water tank (14), the pump (15) and the nozzle (16) are sealed and connected in sequence through water pipes.

7. The elastic bellows internal flaw detection device based on visual detection according to claim 6 is characterized in that: The water pipe connecting the pump (15) and the nozzle (16) passes through the bracket (17).

8. The elastic bellows internal flaw detection device based on visual detection according to claim 1 is characterized in that: An electric heating wire (21) is provided at the air outlet of the fan (20).

9. The elastic bellows internal flaw detection device based on visual detection according to claim 8 is characterized in that: An active cavity (2) is provided inside the outer frame (1), the active block (5) is located inside the active cavity (2), three limiting rods (29) and a threaded rod (28) are provided around the active cavity (2), the three limiting rods (29) and the threaded rod (28) are respectively located at the four corners inside the active cavity (2), a transmission ring (26) is provided outside the active block (5), and the threaded rods (28) and limiting rods (29) at the four corners of the transmission ring (26) are respectively passed through, the outer portion of the limiting rod (29) is slidably connected to the through position of the transmission ring (26), and the outer portion of the threaded rod (28) is threadably matched with the through position of the transmission ring (26).

10. A detection method for the internal flaw detection device of the elastic bellows based on visual detection according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Start the first hydraulic rods (4) at the four corners of the outer frame (1), so that the first hydraulic rods (4) at the four corners extend synchronously to push the outer frame (1); Step 2: The output shaft of the first motor (10) drives the gear (25) to rotate, and the gear (25) drives the movable block (5) inside the transmission ring (26) to rotate through the tooth groove (27). The rotation of the movable block (5) drives the ultrasonic detector (6) and the camera (7) to rotate; Step 3: The camera (7) starts to take pictures of the interior of the corrugated pipe and transmits the pictures to a display screen. The user first visually observes whether the inner wall of the pipe is damaged through the display screen; Step 4: The pump (15) extracts the liquid in the water tank (14) and sprays the liquid out from the nozzle (16); Step 5: Start the third hydraulic rod (22) to push the cleaning brush (13), so that the cleaning brush (13) contacts the wetted position to be cleaned, and the second roller (24) rotates in the movable rail (11) to make the cleaning brush (13) slide along the movable rail (11); Step 6: Start the second hydraulic rod (9) and push the splitter (8) to move longitudinally downward, so that a pair of splitters (8) contact the inner walls of the elastic bellows on both sides of the cleaning position respectively, and the air flow generated by the fan (20) blows the wet position; Step 7: Start the heating wire (21) to increase the temperature of the gas blown by the fan (20), and use a pair of partitions (8) to restrict the gas, so that the high-temperature gas quickly flows around the outer frame (1) and contacts the wet position repeatedly and efficiently; Step 8: Start the ultrasonic detector (6) to detect the internal defects, and locate and quantitatively analyze the defects.

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