Automatic nondestructive testing device for coal-fired unit power plant pipeline

Abstract

This invention provides an automatic non-destructive testing device for pipelines in coal-fired power plants, comprising: a U-shaped testing base, a U-shaped testing frame, and at least two testing probes. The U-shaped testing base includes a base plate, a first support plate, and a second support plate. The first and second support plates are respectively connected to opposite ends of the base plate, forming a U-shaped structure and enclosing an installation space. The first and second support plates together support the pipeline. The U-shaped testing frame is slidably connected to the U-shaped testing base and located within the installation space, allowing reciprocating movement along the direction from the first support plate to the second support plate. The U-shaped testing frame has a receiving space for accommodating the pipeline. The testing probes are connected to the U-shaped testing frame and located within the receiving space. By slidably connecting the U-shaped testing frame to the receiving space of the U-shaped testing base, the testing path of the testing probes is fixed, avoiding inconsistent paths during manual testing and ensuring the consistency and traceability of testing data.

Description

Technical Field

[0001] This invention belongs to the field of pipeline inspection technology, specifically relating to an automatic non-destructive testing device for pipelines in coal-fired power plants. Background Technology

[0002] The main steam, reheat steam, feedwater, and flue gas pulverized coal pipelines of coal-fired power generating units are subjected to high temperature, high pressure, high speed scouring and corrosion environment for a long time, which can easily lead to hidden dangers such as thinning of pipe walls, cracks, corrosion, and weld defects. They are the core inspection objects for safe operation and maintenance of power plants.

[0003] Currently, the industry mostly uses manual handheld probes for pipeline non-destructive testing, which has the following obvious shortcomings: manual testing relies on the operator's experience, the testing path is not standardized, the coverage is limited, it is easy to miss or misdetect, and the data consistency and traceability are poor.

[0004] Therefore, there is an urgent need for an automatic non-destructive testing device for pipelines in coal-fired power plants. Summary of the Invention

[0005] The embodiments of the present invention aim to at least solve one of the technical problems existing in the prior art, and provide an automatic non-destructive testing device for pipelines of coal-fired power plants.

[0006] Embodiments of the present invention provide an automatic non-destructive testing device for pipelines in coal-fired power plants, comprising: The U-shaped detection seat includes a base plate, a first support plate, and a second support plate. The first support plate and the second support plate are respectively connected to opposite ends of the base plate. The first support plate, the second support plate, and the base plate form a U-shaped structure and enclose an installation space. The first support plate and the second support plate are used together to support the pipeline. The U-shaped inspection frame is slidably connected to the U-shaped inspection seat and located within the installation space in a manner that allows it to reciprocate along the direction from the first support plate to the second support plate. The U-shaped inspection frame has a receiving space for accommodating pipes. At least two detection probes are connected to the U-shaped detection frame and located within the receiving space.

[0007] In some embodiments of the present invention, the apparatus further includes: First motor; A reciprocating screw, with the first motor driving and connected to the reciprocating screw, the two ends of the reciprocating screw being rotatably supported on the first support plate and the second support plate respectively, and the reciprocating screw cooperating with the U-shaped detection frame; At least one guide crossbar extends from the first support plate to the second support plate and passes through the U-shaped detection frame.

[0008] In some embodiments of the present invention, the apparatus further includes: A first electric push rod is mounted on the first support plate; A contact plate is located within the installation space. The output end of the first electric push rod is connected to the contact plate. The first electric push rod is used to drive the contact plate to reciprocate along the direction from the first support plate to the second support plate. A clamping cylinder is disposed on the second support plate and located within the installation space. The clamping cylinder and the abutment plate together clamp the pipe along the length direction of the pipe.

[0009] In some embodiments of the present invention, the clamping cylinder is provided with at least two sliding grooves on the side facing the first support plate, the at least two sliding grooves are arranged circumferentially spaced along the clamping cylinder, and each sliding groove extends radially along the clamping cylinder; The device further includes: At least two clamping bars, each of which passes through a corresponding sliding groove, the clamping bars extending from the interior of the clamping cylinder into the receiving space; At least two wedge-shaped pressure blocks, with one wedge-shaped pressure block corresponding to one end of each clamping bar located inside the clamping cylinder; A pusher plate is disposed inside the clamping cylinder and is adapted to the wedge-shaped pressure block; The second electric push rod has its output end connected to the push disk. The second electric push rod is used to drive the push disk to reciprocate along the direction from the second support plate to the first support plate. At least two first springs are provided, each first spring being disposed in a corresponding sliding groove, and the two ends of the first spring being connected to the clamping bar and the end of the sliding groove away from the center of the clamping cylinder, respectively.

[0010] In some embodiments of the present invention, the apparatus further includes: An incomplete gear, wherein the first motor drive is connected to the incomplete gear; The first sprocket, wherein the incomplete gear meshes with the first sprocket; A shaft column is disposed on the side of the second support plate opposite to the first support plate. The shaft column connects the first spur gear and the clamping cylinder. The shaft column, the first spur gear and the clamping cylinder are coaxially arranged.

[0011] In some embodiments of the present invention, the apparatus further includes: A fixing block, which is fixed to the second support plate, is located near the circumferential sidewall of the shaft column; A stop block is provided on the circumferential sidewall of the shaft column; The second spring has its two ends connected to the fixed block and the stop block, respectively.

[0012] In some embodiments of the present invention, the apparatus further includes: The first transmission wheel is connected to the output end of the first motor. The second transmission wheel is coaxially connected to the incomplete gear. A transmission belt connects the first transmission wheel and the second transmission wheel.

[0013] In some embodiments of the present invention, the base plate is provided with a movable groove extending through its thickness direction, and the device further includes: A second motor is mounted on the base plate; A bidirectional screw, with a second motor driving connection to the bidirectional screw, the bidirectional screw extending along the direction from the first support plate to the second support plate, the two ends of the bidirectional screw being rotatably supported at opposite ends of the movable groove, the bidirectional screw comprising a first screw segment, a connecting segment and a second screw segment connected in sequence, the first screw segment and the second screw segment having opposite helical directions; Two threaded sleeves are respectively connected to the first screw section and the second screw section; Two support rods, each of which is rotatably connected to a corresponding threaded sleeve; Two inclined support plates are located near opposite ends of the movable groove. Each support plate is rotatably connected to one end of the corresponding inclined support plate, and the other end of the inclined support plate is rotatably connected to the base plate.

[0014] In some embodiments of the present invention, the apparatus further includes: The second sprocket meshes with the bidirectional screw. The third sprocket meshes with the second sprocket, and the output end of the second motor is connected to the third sprocket.

[0015] In some embodiments of the present invention, the opening of the U-shaped detection seat faces upward, and the opening direction of the U-shaped detection frame forms an angle of 90 degrees with the opening direction of the U-shaped detection seat.

[0016] The automatic non-destructive testing device for pipelines in coal-fired power plants of the present invention uses a first support plate and a second support plate arranged opposite to each other on a U-shaped testing seat to jointly support the pipeline, thereby fixing the pipeline within the accommodating space of the U-shaped testing seat. A U-shaped testing frame is slidably connected to the accommodating space of the U-shaped testing seat, allowing the U-shaped testing frame to move the testing probe along the direction from the first support plate to the second support plate, or vice versa, thus fixing the testing path of the testing probe and avoiding inconsistent paths during manual testing, ensuring the consistency and traceability of the testing data. Using at least two testing probes can increase the testing coverage, avoid missed or false detections, and improve the reliability of the testing data. Attached Figure Description

[0017] Figure 1 This is a schematic diagram (first view) of the automatic non-destructive testing device for pipelines in a coal-fired power plant according to an embodiment of the present invention. Figure 2 for Figure 1 The diagram shows the structure of an automatic non-destructive testing device for pipelines in a coal-fired power plant (second perspective). Figure 3 for Figure 1 The diagram shows the structure of the U-shaped testing frame, guide rod, and reciprocating lead screw. Figure 4 for Figure 1 The diagram shows the structure of the clamping cylinder; Figure 5 for Figure 4 A cross-sectional schematic diagram of the clamping cylinder shown; Figure 6 for Figure 1 The diagram shows the structure of the U-shaped detection seat and the inclined support plate.

[0018] The labels in the attached diagram are as follows: 1. U-shaped detection seat; 2. Reciprocating lead screw; 3. U-shaped detection frame; 4. Detection probe; 5. First electric push rod; 6. Abutment plate; 7. Clamping cylinder; 8. Shaft column; 9. Sliding groove; 10. Slide rod; 11. Clamping bar; 12. Wedge-shaped pressure block; 13. Second electric push rod; 14. Pushing plate; 15. Universal wheel; 16. Guide crossbar; 17. L-shaped bracket; 18. First motor; 19. First transmission wheel; 20. Second transmission wheel; 21. Transmission belt; 22. Incomplete gear; 23. First spur gear; 24. Fixed block; 25. Stop block; 26. Second spring; 27. First spring; 28. Movable groove; 29. ​​Bidirectional screw; 30. Second spur gear; 31. Second motor; 32. Third spur gear; 33. Screw sleeve; 34. Support rod; 35. Rotating head; 36. Inclined support plate. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit disclosure. The described embodiments are some, but not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0020] like Figures 1 to 6 As shown, an embodiment of the present invention provides an automatic non-destructive testing device for pipelines in a coal-fired power plant, comprising: a U-shaped testing base 1, a U-shaped testing frame 3, and at least two testing probes 4. The U-shaped testing base 1 includes a base plate, a first support plate, and a second support plate. The first support plate and the second support plate are respectively connected to opposite ends of the base plate. The first support plate, the second support plate, and the base plate form a U-shaped structure and enclose an installation space. The first support plate and the second support plate are used together to support the pipeline. The U-shaped testing frame 3 is slidably connected to the U-shaped testing base 1 and located within the installation space in a manner that allows reciprocating movement along the direction from the first support plate to the second support plate. The U-shaped testing frame 3 has a receiving space for accommodating the pipeline. At least two testing probes 4 are connected to the U-shaped testing frame 3 and located within the receiving space.

[0021] The automatic non-destructive testing device for pipelines in coal-fired power plants of the present invention uses a first support plate and a second support plate arranged opposite to each other in a U-shaped testing seat 1 to jointly support the pipeline, thereby fixing the pipeline within the accommodating space of the U-shaped testing seat 1. A U-shaped testing frame 3 is slidably connected to the accommodating space of the U-shaped testing seat 1, allowing the U-shaped testing frame 3 to move the testing probe 4 along the direction from the first support plate to the second support plate, or along the direction from the second support plate to the first support plate. This fixes the detection path of the testing probe 4, avoiding inconsistencies in the paths used in manual testing and ensuring the consistency and traceability of the testing data. Using at least two testing probes 4 can increase the detection coverage, avoid missed or false detections, and improve the reliability of the testing data.

[0022] like Figures 1 to 3As shown, the U-shaped inspection frame 3 includes a connector and two support arms. The two support arms are connected to opposite ends of the connector and are located on the same side of the connector. The two support arms and the connector form a U-shaped structure and enclose a space for accommodating the pipe. Each support arm is equipped with at least one inspection probe 4. Both opposite support arms are equipped with inspection probes 4, allowing at least two inspection probes 4 to inspect the pipe from opposite sides, thus improving the inspection coverage. Furthermore, at least one inspection probe 4 can also be provided on the connector to provide more inspection data from different positions and angles. Specifically, the inspection probe 4 can be an ultrasonic probe, eddy current probe, magnetic leakage sensor, laser ultrasonic probe, or optical probe, etc.

[0023] Furthermore, the bottom plate of the U-shaped detection seat 1 is equipped with multiple casters 15 on the side facing away from the installation space. When it is necessary to adjust the detection position of the device, the staff can push the U-shaped detection seat 1 and use the multiple casters 15 on the lower surface of the bottom plate to roll, so that the entire device can be flexibly moved to the corresponding position of the pipeline to be tested. There is no need to manually move the device, which reduces the intensity of operation.

[0024] In some embodiments of the present invention, the opening of the U-shaped detection seat 1 faces upward, and the opening direction of the U-shaped detection frame 3 forms a 90-degree angle with the opening direction of the U-shaped detection seat 1, that is, the opening of the U-shaped detection frame 3 faces the side of the U-shaped detection seat 1. When it is necessary to inspect the pipeline, the pipeline is placed from one side of the U-shaped detection seat where the opening of the U-shaped detection frame 3 is located and inserted between the first support plate and the second support plate, with part of the pipeline located within the receiving space of the U-shaped detection frame 3.

[0025] like Figures 1 to 3 As shown, the device also includes: a first motor 18, a reciprocating screw, and at least one guide rod 16. The two ends of the reciprocating screw are rotatably supported on a first support plate and a second support plate, respectively. The U-shaped detection frame 3 acts as a slider and the reciprocating screw. The two ends of the guide rod 16 are connected to the first support plate and the second support plate, respectively. The guide rod 16 passes through the U-shaped detection frame 3 and is parallel to the axis of the reciprocating screw. The first motor 18 drives the reciprocating screw to rotate, causing the reciprocating screw to slide the U-shaped detection frame 3 along the guide rod 16, so that the U-shaped detection frame 3 drives the detection probe 4 to move along the guide rod 16, ensuring that the detection path of the detection probe 4 is consistent.

[0026] Specifically, the number of guide crossbars 16 is at least one. When there is only one guide crossbar 16, it and the reciprocating screw are positioned at two opposite corners of the U-shaped inspection frame 3 to maintain the balance of the U-shaped inspection frame 3. When there are two or more guide crossbars 16, the two or more crossbars and the reciprocating screw are spaced apart and evenly distributed along the circumference of the U-shaped inspection frame 3. In this embodiment, there are three guide crossbars 16, which are distributed at the four corners of the U-shaped inspection frame 3 to ensure the balance of the U-shaped inspection frame 3 and to ensure sufficient space within the installation space for installing other components.

[0027] like Figure 1 As shown, in some embodiments of the present invention, the device further includes: a first electric push rod 5, an abutment plate 6, and a clamping cylinder 7. Specifically, the first electric push rod 5 is disposed on the first support plate, and the output end of the first electric push rod 5 is connected to the abutment plate 6, which is located within the installation space. The clamping cylinder 7 is disposed on the second support plate and is also located within the installation space. When the pipe is placed within the installation space of the U-shaped detection seat 1, one end of the pipe is close to the abutment plate 6, and the other end of the pipe is close to the clamping cylinder 7. The first electric push rod 5 drives the abutment plate 6 to move toward the second support plate, that is, toward the clamping cylinder 7. As the abutment plate 6 moves, both ends of the pipe contact the abutment plate 6 and the clamping cylinder 7 respectively. The abutment plate 6 continues to move toward the clamping cylinder 7, and both ends of the pipe abut against the abutment plate 6 and the clamping cylinder 7 respectively. The abutment plate 6 and the clamping cylinder 7 clamp and fix the pipe. When it is necessary to remove the pipe from the U-shaped detection seat 1, the first electric push rod 5 drives the abutment plate 6 to move away from the clamping cylinder 7, so that the distance between the abutment plate 6 and the clamping cylinder 7 gradually increases. When the distance between the abutment plate 6 and the clamping cylinder 7 is greater than the length of the pipe, the pipe can be removed from between the abutment plate 6 and the clamping cylinder 7.

[0028] In some embodiments of the present invention, the clamping cylinder 7 has a movable cavity to accommodate the driving component. The clamping cylinder 7 has at least two sliding grooves 9 on the side facing the first support plate, each sliding groove 9 communicating with the movable cavity, the at least two sliding grooves 9 being arranged circumferentially spaced along the clamping cylinder 7, and each sliding groove 9 extending radially along the clamping cylinder 7.

[0029] like Figure 4 , Figure 5As shown, the device further includes: at least two clamping bars 11, at least two wedge-shaped pressure blocks 12, a pusher disk 14, and a second electric push rod 13. Specifically, the number of clamping bars 11, the number of sliding grooves 9, and the number of wedge-shaped pressure blocks 12 are all the same, and the clamping bars 11 and sliding grooves 9 are arranged in a one-to-one correspondence, and the wedge-shaped pressure blocks 12 are arranged in a one-to-one correspondence with the clamping bars 11. Each clamping bar 11 passes through the corresponding sliding groove 9. The clamping bar 11 passes through the sliding groove 9 from the movable cavity inside the clamping cylinder 7 and extends to the receiving space outside the clamping cylinder 7. Each clamping bar 11 has a corresponding wedge-shaped pressure block 12 at one end of the movable cavity inside the clamping cylinder 7. The output end of the second electric push rod 13 is connected to the pusher disk 14, which is located inside the movable cavity of the clamping cylinder 7 and is adapted to at least two wedge-shaped pressure blocks 12. When the clamping strip 11 needs to support the inner wall of the pipe, the second electric push rod 13 drives the push plate 14 along the direction from the second support plate to the first support plate. The push plate 14 pushes at least two wedge-shaped pressure blocks 12 to move along the sliding groove 9 toward the edge of the clamping cylinder 7. The wedge blocks drive the clamping strip 11 to move toward the edge of the clamping cylinder 7. At least two clamping strips 11 extend into the inner wall of the pipe and move toward the inner wall of the pipe. At least two clamping strips 11 support the pipe on the inner wall of the pipe.

[0030] The device also includes at least two first springs 27, the number of which is the same as the number of sliding grooves 9 and they are arranged in a one-to-one correspondence. Each first spring 27 is located in a corresponding sliding groove 9. The two ends of the first spring 27 are respectively connected to the clamping bar 11 and the end of the sliding groove 9 away from the center of the clamping cylinder 7. When the end of the clamping bar 11 and the sliding groove 9 moves closer to the edge of the clamping cylinder 7, the first spring 27 is in a compressed state. When the clamping bar 11 is not needed to support the pipe, the second electric push rod 13 drives the push disk 14 along the direction from the first support plate to the second support plate, and the elastic potential energy of the first spring 27 is released. Under the action of the first spring 27, the clamping bar 11 moves toward the end of the sliding groove 9 closer to the center of the clamping cylinder 7. The clamping bar 11 drives the wedge-shaped pressure block 12 to move into the movable cavity of the clamping cylinder 7 to achieve reset.

[0031] Furthermore, each sliding groove 9 is provided with a sliding rod 10, and each first spring 27 is sleeved on the sliding rod 10 to limit the movement trajectory of the first spring 27 and prevent the first spring 27 from coming out of the sliding groove 9.

[0032] like Figure 2 , Figure 3As shown, in some embodiments of the present invention, the device further includes: an incomplete gear 22, a first spur gear 23, and a shaft 8. Specifically, the first motor 18, the incomplete gear 22, the first spur gear 23, and the shaft 8 are all located on the side of the second support plate away from the first support plate. The second support plate is provided with an L-shaped bracket 17, and the first motor 18 is fixedly connected inside the L-shaped bracket 17. The first motor 18 is driven by the incomplete gear 22, which engages with the first spur gear 23. The shaft 8 connects the first spur gear 23 to the clamping cylinder 7, and the shaft 8, the first spur gear 23, and the clamping cylinder 7 are coaxially arranged. The first motor 18 drives the incomplete gear 22 to rotate. When the incomplete gear 22 meshes with the first spur gear 23, it will drive the first spur gear 23 to rotate. The first spur gear 23 drives the shaft 8, which is coaxial with it, to rotate. The shaft 8 drives the clamping cylinder 7, which is coaxial with it, to rotate. At least two clamping bars 11 on one side of the clamping cylinder 7 clamp the inner wall of the pipe and rotate together with the clamping cylinder 7. Since the incomplete gear 22 has a small number of teeth, the incomplete gear 22 can only drive the pipe to achieve a small rotation.

[0033] In some embodiments of the present invention, the device further includes: a fixing block 24, a stop block 25, and a second spring 26. The fixing block 24 is fixed to the side of the second support plate away from the first support plate and is close to the circumferential side wall of the shaft column 8. The stop block 25 is disposed on the circumferential side wall of the shaft column 8. The two ends of the second spring 26 are respectively connected to the fixing block 24 and the stop block 25. When the incomplete gear 22 drives the first sprocket 23 to rotate, the stop block 25 gradually moves closer to the fixing block 24 and the second spring 26 is gradually compressed. When the incomplete gear 22 disengages from the first sprocket 23, the stop block 25 rotates away from the fixing block 24 under the elastic potential energy of the second spring 26 to reset the stop block 25. At the same time, the stop block 25 drives the shaft column 8 to rotate in the opposite direction, thereby driving the clamping cylinder 7 to rotate in the opposite direction. The clamping cylinder 7 drives the pipe to rotate slightly in the opposite direction through the clamping bar 11.

[0034] By using the above method, the pipeline rotates back and forth slightly, and this cycle continues. In conjunction with the reciprocating movement of the U-shaped inspection frame 3, all-round inspection of the pipeline in both axial and circumferential directions can be achieved, avoiding the problem of limited inspection coverage.

[0035] In some embodiments of the present invention, the device further includes: a first transmission wheel 19, a second transmission wheel 20, and a transmission belt 21. The output end of a first motor 18 is connected to the first transmission wheel 19. The second transmission wheel 20 is coaxially connected to the incomplete gear 22. The transmission belt 21 connects the first transmission wheel 19 and the second transmission wheel 20. The first motor 18 drives the first transmission wheel 19 to rotate, the first transmission wheel 19 drives the transmission belt 21 to rotate, the transmission belt 21 drives the second transmission wheel 20 to rotate, and the second transmission wheel 20 drives the incomplete gear 22 coaxially connected to it to rotate together.

[0036] like Figure 6 As shown, in some embodiments of the present invention, a movable groove 28 penetrating its thickness direction is provided on the base plate. The device also includes: a second motor 31, a bidirectional screw 29, two screw sleeves 33, two support rods 34, and two inclined support plates 36. Specifically, the second motor 31 is disposed on the base plate and is driven and connected to the bidirectional screw 29. The two ends of the bidirectional screw 29 are respectively rotatably supported on the opposite ends of the movable groove 28. The bidirectional screw 29 extends along the direction from the first support plate to the second support plate. The bidirectional screw 29 includes a first screw segment, a connecting segment, and a second screw segment connected in sequence. The helical directions of the first screw segment and the second screw segment are opposite. The two screw sleeves 33 are respectively connected to the first screw segment and the second screw segment. Each support rod 34 is rotatably connected to the corresponding screw sleeve 33. The two inclined support plates 36 are close to the opposite ends of the movable groove 28. Each support plate is rotatably connected to one end of the corresponding inclined support plate 36, and the other end of the inclined support plate 36 is rotatably connected to the base plate.

[0037] When the pipeline is placed in the installation space of the U-shaped detection seat 1, the second motor 31 is started to rotate in the forward direction. The output shaft of the second motor 31 drives the bidirectional screw 29 to rotate in the forward direction around the rotating shaft inside the movable groove 28. Since the threads of the first and second sections of the bidirectional screw 29 are opposite, when the bidirectional screw 29 rotates, it will drive the two threaded sleeves 33 to move in opposite directions along the bidirectional screw 29. The threaded sleeves 33 drive the corresponding support rods 34 to rotate. The support rods 34 push the inclined support plates 36 to rotate around the connecting shaft between them and the U-shaped detection seat 1 through the rotating head 35, so as to adjust the inclination angle of the two inclined support plates 36, so that one end of the inclined support plate 36 is away from the bottom plate, and the top of the inclined support plate 36 is in contact with the outer wall of the pipeline, so as to support the pipeline at the bottom.

[0038] When the pipeline does not require support, the second motor 31 is started to rotate in the reverse direction. The second motor 31 drives the bidirectional screw 29 to rotate in the reverse direction. The bidirectional screw 29 drives the two screw sleeves 33 to move relative to each other along the bidirectional screw 29. The screw sleeves 33 drive the corresponding support rods 34 to rotate. The support rods 34 drive the inclined support plates 36 to rotate around the connecting shaft between them and the U-shaped detection seat 1 through the rotating head 35, so as to adjust the inclination angle of the two inclined support plates 36, so that the inclined support plates 36 move closer to the bottom plate and the top of the inclined support plates 36 move away from the outer wall of the pipeline, thereby releasing the support for the pipeline.

[0039] In this way, when the pipe is placed inside the U-shaped inspection frame 3, it can first be supported by tilting the two inclined support plates 36, then the abutting plate 6 is controlled to abut by the first electric push rod 5, and the pipe is clamped by the clamping strip 11 on the clamping cylinder 7. After that, the inclined support plate 36 is controlled to reset, so as to prevent it from blocking the reciprocating movement of the U-shaped inspection frame.

[0040] In some embodiments of the present invention, the device further includes a second sprocket 30 and a third sprocket 32. The second sprocket 30 meshes with a bidirectional screw 29, and the third sprocket 32 ​​meshes with the second sprocket 30. The output end of a second motor 31 is connected to the third sprocket 32. The second motor 31 drives the second sprocket 30 to rotate via the third sprocket 32, and the third sprocket 32 ​​drives the bidirectional screw 29 to rotate. Both the second motor 31 and the third sprocket 32 ​​are located on the side of the base plate away from the installation space to make reasonable use of space.

[0041] The detection device of the present invention also has the following beneficial effects: The first motor 18 drives the reciprocating lead screw 2 to rotate, which, in conjunction with the limiting action of the guide crossbar 16, drives the U-shaped detection frame 3 and the ultrasonic probe to make left and right reciprocating linear motion. This achieves unified control of the detection path, avoids path confusion caused by differences in operating habits and experience when manually holding the probe, ensures that the path is standardized and consistent for each test, and allows for accurate traceability of the detection data. This effectively reduces missed detections and false detections, and improves the reliability of the test.

[0042] The first motor 18 drives the first transmission wheel 19 to rotate, which in turn drives the incomplete gear 22 to rotate via the transmission belt 21 and the second transmission wheel 20. When the incomplete gear 22 meshes with the first spur gear 23, it drives the pipe on the shaft 8 and the clamping cylinder 7 to rotate slightly. When it disengages, the pipe is reset in the opposite direction by the elastic force of the first spring 27, forming a small-amplitude reciprocating oscillation of the pipe. At the same time, in conjunction with the left and right reciprocating motion of the U-shaped detection frame 3, it realizes all-round scanning detection of the pipe in the axial and circumferential directions, which completely solves the drawback of the limited coverage of manual detection, ensures that all parts of the pipe can be effectively detected, and further reduces the risk of missed detection.

[0043] By pushing the abutment plate 6 with the first electric push rod 5, and cooperating with the second electric push rod 13, push plate 14, wedge-shaped pressure block 12, clamping bar 11 and second spring 26 in the clamping cylinder 7, the pipeline can be quickly positioned and firmly clamped, ensuring that the pipeline does not shift during the inspection process and guaranteeing the accuracy of the inspection.

[0044] The second motor 31 drives the bidirectional screw 29 to rotate, which in turn drives the screw sleeve 33, support rod 34 and inclined support plate 36 to adjust the tilt angle. This can provide auxiliary support and positioning for pipes of different diameters, and is suitable for the testing needs of various specifications of pipes such as main steam, reheat steam, feedwater and flue gas pulverized coal pipes. After the test is completed, the clamping can be quickly released by the retraction of the electric push rod and the spring reset, and the pipe can be easily removed. The operation is efficient and convenient.

[0045] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An automatic non-destructive testing device for pipelines in a coal-fired power plant, characterized in that, include: The U-shaped detection seat includes a base plate, a first support plate, and a second support plate. The first support plate and the second support plate are respectively connected to opposite ends of the base plate. The first support plate, the second support plate, and the base plate form a U-shaped structure and enclose an installation space. The first support plate and the second support plate are used together to support the pipeline. The U-shaped inspection frame is slidably connected to the U-shaped inspection seat and located within the installation space in a manner that allows it to reciprocate along the direction from the first support plate to the second support plate. The U-shaped inspection frame has a receiving space for accommodating pipes. At least two detection probes are connected to the U-shaped detection frame and located within the receiving space.

2. The automatic non-destructive testing device for coal-fired power plant pipelines according to claim 1, characterized in that, The device further includes: First motor; A reciprocating screw, with the first motor driving and connected to the reciprocating screw, the two ends of the reciprocating screw being rotatably supported on the first support plate and the second support plate respectively, and the reciprocating screw cooperating with the U-shaped detection frame; At least one guide crossbar extends from the first support plate to the second support plate and passes through the U-shaped detection frame.

3. The automatic non-destructive testing device for coal-fired power plant pipelines according to claim 2, characterized in that, The device further includes: A first electric push rod is mounted on the first support plate; A contact plate is located within the installation space. The output end of the first electric push rod is connected to the contact plate. The first electric push rod is used to drive the contact plate to reciprocate along the direction from the first support plate to the second support plate. A clamping cylinder is disposed on the second support plate and located within the installation space. The clamping cylinder and the abutment plate together clamp the pipe along the length direction of the pipe.

4. The automatic non-destructive testing device for coal-fired power plant pipelines according to claim 3, characterized in that, The clamping cylinder has at least two sliding grooves on the side facing the first support plate. The at least two sliding grooves are arranged at intervals along the circumference of the clamping cylinder, and each sliding groove extends radially along the clamping cylinder. The device further includes: At least two clamping bars, each of which passes through a corresponding sliding groove, the clamping bars extending from the interior of the clamping cylinder into the receiving space; At least two wedge-shaped pressure blocks, with one wedge-shaped pressure block corresponding to one end of each clamping bar located inside the clamping cylinder; A pusher plate is disposed inside the clamping cylinder and is adapted to the wedge-shaped pressure block; The second electric push rod has its output end connected to the push disk. The second electric push rod is used to drive the push disk to reciprocate along the direction from the second support plate to the first support plate. At least two first springs are provided, each first spring being disposed in a corresponding sliding groove, and the two ends of the first spring being connected to the clamping bar and the end of the sliding groove away from the center of the clamping cylinder, respectively.

5. The automatic non-destructive testing device for pipelines in coal-fired power plants according to claim 3, characterized in that, The device further includes: An incomplete gear, wherein the first motor drive is connected to the incomplete gear; The first sprocket, wherein the incomplete gear meshes with the first sprocket; A shaft column is disposed on the side of the second support plate opposite to the first support plate. The shaft column connects the first spur gear and the clamping cylinder. The shaft column, the first spur gear and the clamping cylinder are coaxially arranged.

6. The automatic non-destructive testing device for coal-fired power plant pipelines according to claim 5, characterized in that, The device further includes: A fixing block, which is fixed to the second support plate, is located near the circumferential sidewall of the shaft column; A stop block is provided on the circumferential sidewall of the shaft column; The second spring has its two ends connected to the fixed block and the stop block, respectively.

7. The automatic non-destructive testing device for pipelines in coal-fired power plants according to claim 5, characterized in that, The device further includes: The first transmission wheel is connected to the output end of the first motor. The second transmission wheel is coaxially connected to the incomplete gear. A transmission belt connects the first transmission wheel and the second transmission wheel.

8. The automatic non-destructive testing device for pipelines in coal-fired power plants according to claim 1, characterized in that, The base plate is provided with a movable groove extending through its thickness direction, and the device further includes: A second motor is mounted on the base plate; A bidirectional screw, with a second motor driving connection to the bidirectional screw, the bidirectional screw extending along the direction from the first support plate to the second support plate, the two ends of the bidirectional screw being rotatably supported at opposite ends of the movable groove, the bidirectional screw comprising a first screw segment, a connecting segment and a second screw segment connected in sequence, the first screw segment and the second screw segment having opposite helical directions; Two threaded sleeves are respectively connected to the first screw section and the second screw section; Two support rods, each of which is rotatably connected to a corresponding threaded sleeve; Two inclined support plates are located near opposite ends of the movable groove. Each support plate is rotatably connected to one end of the corresponding inclined support plate, and the other end of the inclined support plate is rotatably connected to the base plate.

9. The automatic non-destructive testing device for pipelines in coal-fired power plants according to claim 8, characterized in that, The device further includes: The second sprocket meshes with the bidirectional screw. The third sprocket meshes with the second sprocket, and the output end of the second motor is connected to the third sprocket.

10. The automatic non-destructive testing device for pipelines in coal-fired power plants according to claim 1, characterized in that, The opening of the U-shaped detection seat faces upward, and the angle between the opening direction of the U-shaped detection frame and the opening direction of the U-shaped detection seat is 90 degrees.

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