Steel pipe leakage hole detection device and detection method thereof

Abstract

The invention provides a steel pipe leakage hole detection device and a detection method thereof, and relates to the technical field of pipe detection, the steel pipe leakage hole detection device comprises a rack, a discharging disc, a fixing frame and a rolling table, the top of the rack is provided with a sensor used for detecting the displacement condition of a steel pipe, and the bottom of the rack is provided with a classification frame used for classifying the detected steel pipe; the discharging disc is located at one end of the rack, a conveying frame used for conveying a single steel pipe is further arranged between the discharging disc and the rolling table, the fixing frame is fixedly installed at the top of the rack, a steel pipe leakage hole detection camera is arranged at the bottom of the fixing frame, a steel pipe clamping assembly is fixedly installed on the fixing frame, and a rotating disc is further arranged at the output end of the steel pipe clamping assembly. The rotating motor is controlled to drive the first transmission roller to rotate, the first transmission roller drives the steel pipe and the second transmission roller to rotate at the same time, and the situation that leakage hole detection is inaccurate due to the fact that dead corners or special-shaped holes exist in the steel pipe during detection is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe detection, and in particular to a steel pipe leakage detection device and a detection method thereof. Background Art

[0002] With the development of the global economy and the advancement of technology, the safety requirements for energy transmission systems are becoming increasingly higher. As an important component of the energy transmission system, the quality of steel pipes is directly related to the safety and reliability of the entire system. Steel pipes are widely used in oil and natural gas pipelines and other key infrastructure construction. The quality of steel pipes is directly related to the safety and reliability of the system. Therefore, it is very necessary to conduct strict leak detection on steel pipes after they are manufactured.

[0003] The existing publication number CN113189114B discloses a steel pipe surface defect detection device and a detection method. The steel pipe surface defect detection device includes a steel pipe roller mechanism, a steel pipe, a camera movement control mechanism, a camera, a steel pipe clamping and rotating mechanism and a main control computer. A steel pipe surface defect detection method is applied to the steel pipe surface defect detection device, and the steps are as follows: 1. Preset items; 2. Steel pipe segmentation; 3. Clamp the steel pipe; 4. Obtain a steel pipe surface image; 5. Image comparison, which can replace manual surface quality inspection of steel pipes and adapt to surface quality inspections of different pipe diameters, different lengths, and different inspection accuracy requirements. Compared with manual inspection, the inspection efficiency is higher and the false and missed inspection rate is greatly reduced.

[0004] However, the above-mentioned steel pipe inspection still requires manual intervention to load and unload the steel pipe, which not only increases the labor intensity, but also reduces the inspection speed and has a low degree of automation. In addition, the steel pipe is easily affected by external collisions when rotating, causing deviation and affecting the shooting effect.

[0005] Therefore, it is necessary to provide a new steel pipe leak detection device and a detection method thereof to solve the above technical problems. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a steel pipe leak detection device and a detection method thereof.

[0007] The steel pipe leakage detection device provided by the present invention on one aspect comprises a frame, a feeding tray, a fixed frame and a rolling table, wherein a sensor for detecting the displacement status of the steel pipe is provided on the top of the frame, a classification frame for classifying the detected steel pipes is provided at the bottom of the frame, the feeding tray is located at one end of the frame, a feeding frame for conveying a single steel pipe is also provided between the feeding tray and the rolling table, the fixed frame is fixedly installed on the top of the frame, a steel pipe leakage detection camera is provided at the bottom of the fixed frame, a steel pipe clamping assembly is fixedly installed on the fixed frame, and a rotating disk is also provided at the output end of the steel pipe clamping assembly; The rolling platform includes a transmission roller 1, a transmission roller 2, a push rod and a mounting frame. The transmission roller 1 is rotatably mounted on the inner side of the frame. A rotating motor is also provided at one end of the transmission roller 1. The push rod is fixedly mounted on the top of the frame. The mounting frame is fixedly mounted on the output end of the push rod. The transmission roller 2 is rotatably mounted on the inner side wall of the mounting frame.

[0008] Furthermore, the unloading tray includes a hopper, a rotating rod and a rotating driving member, and connecting plates are provided on both sides of the hopper, and the connecting plates are fixedly connected to the rotating rod, one end of the rotating rod is rotatably mounted on the inner side of the frame, and the other end of the rotating rod is fixedly connected to the rotating driving member; A plurality of material discharge troughs are equidistantly provided at one end of the hopper away from the connecting plate, and blocks are provided between the plurality of material discharge troughs.

[0009] Furthermore, the feed frame includes a cross frame, which is fixedly installed on the top of the frame, and a plurality of guide frames are cross-traversed on the surface of the cross frame, and one end of the guide frame is conical and arranged upward, and the conical end of the guide frame can pass through the discharge chute to separate two adjacent steel pipes, and the other end of the guide frame is provided with a baffle to buffer the rolling of the steel pipe, and one end of the baffle is located above the steel pipe clamping assembly.

[0010] Furthermore, the steel pipe clamping assembly includes a support frame, a double-headed screw, a drive motor and two opposing sliders. The support frame is fixedly installed on the outside of the fixed frame, the drive motor is fixedly installed on the support frame, and the output end of the drive motor is fixedly connected to one end of the double-headed screw, the other end of the double-headed screw is rotatably connected to the inner wall of the support frame, the thread directions at both ends of the double-headed screw are opposite, the two sliders are respectively threadedly connected to the two ends of the double-headed screw, the two sliders are respectively slidably installed on the fixed frame, the bottoms of the two sliders are fixed with a limit frame, and the turntable is rotatably installed on the inner wall of the limit frame.

[0011] Furthermore, the classification rack includes a bracket, a power motor and a shaft rod, the bracket is fixedly installed on the inner side of the frame, one end of the shaft rod is rotatably installed on the bracket, and the other end of the shaft rod is fixedly connected to the output end of the power motor, the power motor is fixedly installed on the inner side of the frame, and the outer surface of the shaft rod is provided with multiple rotating plates at equal distances in the circumferential direction.

[0012] Furthermore, the rotary drive member includes a base and a motor, the base is fixedly mounted on one side of the frame, the motor is fixedly mounted on the base, and the output end of the motor is fixedly connected to one end of the rotating rod.

[0013] Furthermore, two opposite classification plates are provided on both sides of the shaft rod, the two classification plates are respectively fixedly installed on the inner side of the frame, and the two classification plates are inclined from the center of the frame to the outer side of the frame.

[0014] Another aspect of the present invention provides a detection method for a steel pipe leak detection device, the method comprising the following steps: S1, steel pipe unloading, by controlling the motor to rotate forward to drive the rotating rod and the hopper to rotate, as one end of the hopper rotates downward to a certain angle, the conical end of the guide frame passes through the unloading chute to separate two adjacent steel pipes, and the steel pipe in the front row rolls along the hopper and the guide frame to between the first transmission roller and the second transmission roller; S2, clamp the steel pipe, control the driving motor to rotate forward to drive the double-headed screw to rotate, and then drive the two sliders to approach each other along the axial direction of the fixed frame through the threads at both ends of the double-headed screw, so that the two limit frames limit the position of the steel pipe, and stop the driving motor after the two ends of the steel pipe touch the turntable; S3, obtaining the surface image of the steel pipe, by controlling the rotary motor to drive the transmission roller 1 to rotate, the transmission roller 1 drives the steel pipe and the transmission roller 2 to rotate simultaneously, and taking pictures of the surface of the steel pipe through the detection camera; S4, image comparison, comparing the photo taken by the detection camera with the standard photo, and judging it as qualified if it meets the standard, otherwise it is judged as unqualified; S5, classification of leak holes in steel pipes, by controlling the reverse rotation of the driving motor to drive the double-headed screw to rotate, and then the threads at both ends of the double-headed screw drive the two sliders to move away from each other along the axial direction of the fixed frame. After the two ends of the steel pipe are separated from the turntable, the push rod is controlled to drive the mounting frame to shrink, so that the transmission roller 2 is away from the transmission roller 1, and the steel pipe falls between two adjacent rotating plates. According to the image comparison results, the power motor is controlled to rotate forward and reverse, driving the shaft rod and the rotating plate to rotate forward and reverse, so that the steel pipes with different comparison results fall into two different classification plates respectively; S6, continuous detection, repeating steps S1-S5 to complete the automatic continuous detection of steel pipe leaks.

[0015] Furthermore, every time the steel pipe rotates 90°, the detection camera takes a photo once, four photos are obtained for the same steel pipe, and the four photos are displayed on the same plane.

[0016] Furthermore, after the steel pipes are unloaded, the motor is controlled to reverse and drive the rotating rod and the hopper to rotate. When one end of the hopper is rotated upward to a certain angle, the conical end of the guide frame separates from the unloading chute, and the steel pipes in the front row roll down the hopper and are blocked by the block.

[0017] Compared with the related art, the steel pipe leak detection device and detection method provided by the present invention have the following beneficial effects: 1. The present invention drives the double-headed screw to rotate by controlling the forward rotation of the driving motor, and then drives the two sliders to approach each other along the axial direction of the fixed frame through the threads at both ends of the double-headed screw, so that the two limit frames limit the position of the steel pipe, and the driving motor is stopped after the two ends of the steel pipe contact the turntable, thereby improving the stability of the steel pipe during rotation and ensuring the consistency of subsequent shooting of the steel pipe surface. At the same time, the limit frame can protect the end of the steel pipe to a certain extent to prevent external impact from affecting the detection effect.

[0018] 2. The present invention controls the rotating motor to drive the transmission roller 1 to rotate, and the transmission roller 1 drives the steel pipe and the transmission roller 2 to rotate simultaneously, thereby avoiding the situation in which the leakage detection is inaccurate due to the presence of dead angles or special-shaped holes in the steel pipe during detection.

[0019] 3. The present invention arranges a sensor on the frame to detect the displacement status of the steel pipe, and can automatically open or close the detection device according to the displacement status of the steel pipe, thereby avoiding unnecessary running time, further saving energy, and completing the automatic and continuous detection of steel pipe leaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The overall structure of the steel pipe leak detection device provided by the present invention is shown in FIG. Figure 1 ; Figure 2 The overall structure of the steel pipe leak detection device provided by the present invention is shown in FIG. Figure 2 ; Figure 3 A schematic diagram of the overall structure of the unloading tray and the feeding rack provided by the present invention; Figure 4 A schematic diagram of the split structure of the unloading tray and the feeding rack provided by the present invention; Figure 5 A schematic diagram of the structure of the steel pipe clamping assembly, rolling table and classification rack provided by the present invention; Figure 6 This is a flow chart of the steel pipe leak detection method provided by the present invention.

[0021] Numbers in the figure: 1. Frame; 2. Discharge tray; 3. Fixed frame; 4. Classification frame; 5. Feed rack; 6. Detection camera; 7. Steel pipe clamping assembly; 8. Turntable; 9. Drive roller one; 10. Drive roller two; 11. Push rod; 12. Mounting frame; 13. Rotating motor; 14. Hopper; 15. Rotating rod; 16. Connecting plate; 17. Discharge chute; 18. Block; 19. Cross frame; 20. Guide frame; 21. Baffle; 22. Support frame; 23. Double-headed screw; 24. Drive motor; 25. Slider; 26. Limiting frame; 27. Bracket; 28. Power motor; 29. ​​Shaft; 30. Rotating plate; 31. Base; 32. Motor; 33. Classification tray. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0023] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 as well as Figure 6 ,in, Figure 1 The overall structure of the steel pipe leak detection device provided by the present invention is shown in FIG. Figure 1 ; Figure 2 The overall structure of the steel pipe leak detection device provided by the present invention is shown in FIG. Figure 2 ; Figure 3 A schematic diagram of the overall structure of the unloading tray and the feeding rack provided by the present invention; Figure 4 A schematic diagram of the split structure of the unloading tray and the feeding rack provided by the present invention; Figure 5 A schematic diagram of the structure of the steel pipe clamping assembly, rolling table and classification rack provided by the present invention; Figure 6 This is a flow chart of the steel pipe leak detection method provided by the present invention.

[0024] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. It should be understood that the terms "one", "two", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "one", "two", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0025] Embodiment 1 In the specific implementation process, Figure 1-Figure 5As shown, the steel pipe leakage detection device provided by the present invention includes a frame 1, a feeding tray 2, a fixed frame 3 and a rolling table. A sensor for detecting the displacement status of the steel pipe is provided on the top of the frame 1, and a classification frame 4 for classifying the detected steel pipes is provided at the bottom of the frame 1. The feeding tray 2 is located at one end of the frame 1, and a feeding rack 5 for conveying a single steel pipe is also provided between the feeding tray 2 and the rolling table. The fixed frame 3 is fixedly installed on the top of the frame 1, and a steel pipe leakage detection camera 6 is provided at the bottom of the fixed frame 3. The detection camera 6 is a high-resolution industrial camera. A steel pipe clamping assembly 7 is fixedly installed on the fixed frame 3, and a turntable 8 is also provided at the output end of the steel pipe clamping assembly 7. The turntable 8 can clamp the steel pipe without affecting the rotation of the steel pipe, that is, the two ends of the steel pipe can rotate through the two turntables 8; Among them, the rolling platform includes a transmission roller 19, a transmission roller 210, a push rod 11 and a mounting frame 12. The transmission roller 19 is rotatably installed on the inner side of the frame 1. A rotating motor 13 is also provided at one end of the transmission roller 9. The push rod 11 is fixedly installed on the top of the frame 1. The mounting frame 12 is fixedly installed on the output end of the push rod 11. The transmission roller 210 is rotatably installed on the inner wall of the mounting frame 12. The transmission roller 19 is driven to rotate by the rotating motor 13. The transmission roller 19 drives the steel pipe to rotate. The transmission roller 210 rotates synchronously with the rotation of the steel pipe.

[0026] It should be noted that the reference Figure 4 As shown, the unloading tray 2 includes a hopper 14, a rotating rod 15, a base 31 and a motor 32. Both sides of the hopper 14 are provided with connecting plates 16, and the connecting plates 16 are fixedly connected to the rotating rod 15. One end of the rotating rod 15 is rotatably mounted on the inner side of the frame 1, and the base 31 is fixedly mounted on one side of the frame 1. The motor 32 is fixedly mounted on the base 31, and the output end of the motor 32 is fixedly connected to one end of the rotating rod 15. The rotating rod 15 and the hopper 14 are driven to rotate forward and reversely through the forward and reverse rotation of the motor 32 to perform unloading work; Furthermore, a plurality of discharge chutes 17 are equidistantly provided at one end of the hopper 14 away from the connecting plate 16 , and a stopper 18 is provided between the plurality of discharge chutes 17 , and the stopper 18 is used to prevent the steel pipe from rolling down.

[0027] In a specific implementation process, reference Figure 4 As shown, the feed frame 5 includes a cross frame 19, which is fixedly mounted on the top of the frame 1. A plurality of guide frames 20 are traversed on the surface of the cross frame 19, and one end of the guide frame 20 is tapered and arranged upward. The tapered end of the guide frame 20 can pass through the feed chute 17 to separate two adjacent steel pipes. A baffle 21 for buffering the rolling of the steel pipe is arranged at the other end of the guide frame 20, and one end of the baffle 21 is located above the steel pipe clamping assembly 7. It should be noted that a torsion spring is provided at the connection between the baffle 21 and the guide frame 20 , and the torsion spring is used to buffer the falling steel pipe and drive the baffle 21 to reset.

[0028] In a specific implementation process, reference Figure 5 As shown, the steel pipe clamping assembly 7 includes a support frame 22, a double-headed screw 23, a drive motor 24 and two opposing sliders 25. The support frame 22 is fixedly installed on the outside of the fixed frame 3, the drive motor 24 is fixedly installed on the support frame 22, and the output end of the drive motor 24 is fixedly connected to one end of the double-headed screw 23, and the other end of the double-headed screw 23 is rotatably connected to the inner wall of the support frame 22. The threads at both ends of the double-headed screw 23 are in opposite directions. The two sliders 25 are respectively threadedly connected to the two ends of the double-headed screw 23. The two sliders 25 are respectively slidably installed on the fixed frame 3, and the bottoms of the two sliders 25 are fixed with a limit frame 26. The turntable 8 is rotatably installed on the inner wall of the limit frame 26. The double-headed screw 23 is driven to rotate by starting the drive motor 24, and then the two sliders 25 are driven by the threads at both ends of the double-headed screw 23 to move closer or farther along the axial direction of the fixed frame 3.

[0029] In a specific implementation process, reference Figure 5 As shown, the classification rack 4 includes a bracket 27, a power motor 28 and a shaft 29. The bracket 27 is fixedly installed on the inner side of the frame 1, one end of the shaft 29 is rotatably installed on the bracket 27, and the other end of the shaft 29 is fixedly connected to the output end of the power motor 28. The power motor 28 is fixedly installed on the inner side of the frame 1, and a plurality of rotating plates 30 are circumferentially and equidistantly provided on the outer surface of the shaft 29. Two opposite classification disks 33 are also provided on both sides of the shaft 29. The two classification disks 33 are respectively fixedly installed on the inner side of the frame 1, and the two classification disks 33 are inclined from the center of the frame 1 to the outer side of the frame 1. The shaft 29 is driven to rotate by starting the power motor 28, and the rotating plate 30 on the surface of the shaft 29 can be used to control the classification direction of the steel pipes.

[0030] Embodiment 2 In the specific implementation process, the detection camera 6 can be replaced by an X-ray or gamma-ray detector. The image formed by the attenuation of the rays after passing through the steel pipe can clearly show whether there are expected holes inside.

[0031] Embodiment 3 In the specific implementation process, refer to Figure 6As shown, a detection method for a steel pipe leak detection device provided by the present invention comprises the following steps: S1, steel pipe unloading, by controlling the motor 32 to rotate forward to drive the rotating rod 15 and the hopper 14 to rotate, as one end of the hopper 14 rotates downward to a certain angle, the tapered end of the guide frame 20 passes through the unloading chute 17, separates two adjacent steel pipes, and the steel pipes in the front row roll down along the hopper 14 and the guide frame 20 to between the transmission roller 1 9 and the transmission roller 2 10, after the steel pipe is unloaded, the motor 32 is controlled to rotate in the reverse direction to drive the rotating rod 15 and the hopper 14 to rotate, as one end of the hopper 14 rotates upward to a certain angle, the tapered end of the guide frame 20 is separated from the unloading chute 17, and the steel pipes in the front row roll down along the hopper 14 and are blocked by the stopper 18; S2, clamp the steel pipe, control the driving motor 24 to rotate forward to drive the double-headed screw 23 to rotate, and then drive the two sliders 25 to approach each other along the axial direction of the fixed frame 3 through the threads at both ends of the double-headed screw 23, so that the two limit frames 26 limit the position of the steel pipe, and stop the driving motor 24 after the two ends of the steel pipe touch the turntable 8; S3, obtaining the surface image of the steel pipe, by controlling the rotating motor 13 to drive the transmission roller 1 9 to rotate, the transmission roller 1 9 drives the steel pipe and the transmission roller 2 10 to rotate simultaneously, and taking pictures of the surface of the steel pipe through the detection camera 6. The detection camera 6 takes a picture once every time the steel pipe rotates 90°. Four pictures are obtained for the same steel pipe, and the four pictures are displayed on the same plane; S4, image comparison, comparing the photo taken by the detection camera 6 with the standard photo, judging it as qualified if it meets the standard, otherwise it is judged as unqualified, wherein the standard photo is a photo of steel pipes without surface defects selected from a batch of qualified finished steel pipes; S5, classification of leak holes in steel pipes, by controlling the reverse rotation of the driving motor 24 to drive the double-headed screw 23 to rotate, and then driving the two sliders 25 to move away from each other along the axial direction of the fixed frame 3 through the threads at both ends of the double-headed screw 23, after the two ends of the steel pipe are separated from the turntable 8, the push rod 11 is controlled to drive the mounting frame 12 to contract, so that the transmission roller 2 10 is away from the transmission roller 1 9, and the steel pipe falls between two adjacent rotating plates 30, and according to the image comparison result, the power motor 28 is controlled to rotate forward and reverse, driving the shaft 29 and the rotating plate 30 to rotate forward and reverse, so that the steel pipes with different comparison results fall into two different classification plates 33 respectively; S6, continuous detection, repeating steps S1-S5 to complete the automatic continuous detection of steel pipe leaks.

[0032] Embodiment 4 In the specific implementation process, the hole pattern of the steel pipe punching can also be analyzed in the image comparison to determine whether it is a hole shape image of a standard template, which is used to pick out the types of steel pipes with punching defects, avoid leaks, and detect defects in the formed holes.

[0033] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0034] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A steel pipe leak detection device, characterized in that: The machine comprises a frame (1), a material unloading tray (2), a fixed frame (3) and a rolling table, wherein a sensor for detecting the displacement status of a steel pipe is provided on the top of the frame (1), a classification frame (4) for classifying the detected steel pipes is provided on the bottom of the frame (1), the material unloading tray (2) is located at one end of the frame (1), a material conveying frame (5) for conveying a single steel pipe is provided between the material unloading tray (2) and the rolling table, the fixed frame (3) is fixedly mounted on the top of the frame (1), a steel pipe leak detection camera (6) is provided at the bottom of the fixed frame (3), a steel pipe clamping assembly (7) is fixedly mounted on the fixed frame (3), and a rotating disk (8) is provided at the output end of the steel pipe clamping assembly (7); The rolling platform comprises a driving roller 1 (9), a driving roller 2 (10), a push rod (11) and a mounting frame (12); the driving roller 1 (9) is rotatably mounted on the inner side of the frame (1); a rotating motor (13) is further provided at one end of the driving roller 1 (9); the push rod (11) is fixedly mounted on the top of the frame (1); the mounting frame (12) is fixedly mounted on the output end of the push rod (11); and the driving roller 2 (10) is rotatably mounted on the inner side wall of the mounting frame (12).

2. The steel pipe leak detection device according to claim 1, characterized in that: The unloading tray (2) comprises a hopper (14), a rotating rod (15) and a rotating driving member, a connecting plate (16) is provided on both sides of the hopper (14), the connecting plate (16) is fixedly connected to the rotating rod (15), one end of the rotating rod (15) is rotatably mounted on the inner side of the frame (1), and the other end of the rotating rod (15) is fixedly connected to the rotating driving member; A plurality of material discharge chutes (17) are equidistantly provided at one end of the hopper (14) away from the connecting plate (16), and a stopper (18) is provided between the plurality of material discharge chutes (17).

3. The steel pipe leak detection device according to claim 2, characterized in that: The feed frame (5) comprises a cross frame (19), wherein the cross frame (19) is fixedly mounted on the top of the frame (1), and a plurality of guide frames (20) are disposed across the surface of the cross frame (19), and one end of the guide frame (20) is conical and arranged upward, and the conical end of the guide frame (20) can pass through the feed chute (17) to separate two adjacent steel pipes, and a baffle (21) for buffering the rolling of the steel pipe is disposed at the other end of the guide frame (20), and one end of the baffle (21) is located above the steel pipe clamping assembly (7).

4. The steel pipe leak detection device according to claim 3, characterized in that: The steel pipe clamping assembly (7) comprises a support frame (22), a double-headed screw (23), a drive motor (24) and two opposing sliders (25), wherein the support frame (22) is fixedly mounted on the outside of the fixed frame (3), the drive motor (24) is fixedly mounted on the support frame (22), and the output end of the drive motor (24) is fixedly connected to one end of the double-headed screw (23), the other end of the double-headed screw (23) is rotatably connected to the inner wall of the support frame (22), the threads at the two ends of the double-headed screw (23) are in opposite directions, the two sliders (25) are respectively threadedly connected to the two ends of the double-headed screw (23), the two sliders (25) are respectively slidably mounted on the fixed frame (3), the bottoms of the two sliders (25) are fixed with a limit frame (26), and the turntable (8) is rotatably mounted on the inner wall of the limit frame (26).

5. The steel pipe leak detection device according to claim 4, characterized in that: The classification rack (4) comprises a bracket (27), a power motor (28) and a shaft (29); the bracket (27) is fixedly mounted on the inner side of the frame (1); one end of the shaft (29) is rotatably mounted on the bracket (27), and the other end of the shaft (29) is fixedly connected to an output end of the power motor (28); the power motor (28) is fixedly mounted on the inner side of the frame (1); and a plurality of rotating plates (30) are provided on the outer surface of the shaft (29) at equal distances in the circumferential direction.

6. The steel pipe leak detection device according to claim 5, characterized in that: The rotary drive member comprises a base (31) and a motor (32); the base (31) is fixedly mounted on one side of the frame (1); the motor (32) is fixedly mounted on the base (31); and the output end of the motor (32) is fixedly connected to one end of the rotating rod (15).

7. The steel pipe leak detection device according to claim 6, characterized in that: Two opposing classification plates (33) are also provided on both sides of the shaft (29); the two classification plates (33) are respectively fixedly mounted on the inner side of the frame (1), and the two classification plates (33) are arranged to be inclined from the center of the frame (1) toward the outer side of the frame (1).

8. A detection method applicable to the steel pipe leak detection device according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1, steel pipe unloading, by controlling the motor (32) to rotate forward to drive the rotating rod (15) and the hopper (14) to rotate, when one end of the hopper (14) rotates downward to a certain angle, the conical end of the guide frame (20) passes through the unloading chute (17), separates two adjacent steel pipes, and the steel pipe in the front row rolls along the hopper (14) and the guide frame (20) to between the first transmission roller (9) and the second transmission roller (10); S2, clamping the steel pipe, driving the double-headed screw (23) to rotate by controlling the driving motor (24) to rotate forward, and then driving the two sliders (25) to approach each other along the axial direction of the fixed frame (3) through the threads at both ends of the double-headed screw (23), so that the two limit frames (26) limit the position of the steel pipe, and stopping the driving motor (24) after the two ends of the steel pipe contact the rotating disk (8); S3, obtaining an image of the steel pipe surface by controlling the rotary motor (13) to drive the transmission roller 1 (9) to rotate, the transmission roller 1 (9) drives the steel pipe and the transmission roller 2 (10) to rotate simultaneously, and taking a picture of the steel pipe surface by using the detection camera (6); S4, image comparison, comparing the photo taken by the detection camera (6) with the standard photo, and judging it as qualified if it meets the standard, otherwise it is judged as unqualified; S5, classification of leak holes in steel pipes, by controlling the driving motor (24) to reverse and drive the double-headed screw (23) to rotate, and then driving the two sliders (25) to move away from each other along the axial direction of the fixed frame (3) through the threads at both ends of the double-headed screw (23), after the two ends of the steel pipe are separated from the rotating disk (8), the push rod (11) is controlled to drive the mounting frame (12) to contract, so that the transmission roller 2 (10) is separated from the transmission roller 1 (9), and the steel pipe falls between two adjacent rotating plates (30), and according to the image comparison result, the power motor (28) is controlled to rotate forward and reverse, driving the shaft (29) and the rotating plate (30) to rotate forward and reverse, so that the steel pipes with different comparison results fall into two different classification disks (33) respectively; S6, continuous detection, repeating steps S1-S5 to complete the automatic continuous detection of steel pipe leaks.

9. The detection method of the steel pipe leak detection device according to claim 8, characterized in that: Every time the steel pipe rotates 90°, the detection camera (6) takes a photo once. Four photos are obtained for the same steel pipe and the four photos are displayed on the same plane.

10. The detection method of the steel pipe leak detection device according to claim 9, characterized in that: After the steel pipes are unloaded, the motor (32) is controlled to reverse and drive the rotating rod (15) and the hopper (14) to rotate. When one end of the hopper (14) is rotated upward to a certain angle, the conical end of the guide frame (20) is separated from the unloading chute (17), and the steel pipes in the front row roll down along the hopper (14) and are blocked by the stopper (18).

Images