Visual inspection device for weld defects

Abstract

The invention relates to a visual detection device for weld defects, and belongs to the technical field of petroleum tool detection. According to the device, the regular hexagonal prism base is adopted for stable supporting; and the driving supporting legs and the moving wheels are arranged and flexibly shuttle inside the oil pipe. The built-in adjusting assembly is cooperated with the driving mechanism through an elastic piece, so that the camera is ensured to be accurately positioned, and inner wall details are captured. The cameras and the light-emitting sources which are annularly distributed are matched with the shooting holes in the blocking cover, so that dead-angle-free visual coverage is formed, and the welding seam state is directly visualized. In addition, according to the integrated nondestructive testing assembly, the lifting frame is used for carrying a flaw detector, internal defects are deeply detected, and positioning is accurate. According to the device, visual detection and nondestructive inspection are combined, so that the detection efficiency is improved, the problem of the inner wall can be accurately identified and positioned, instant maintenance and replacement are facilitated, and the safety and reliability of a petroleum tool are remarkably enhanced.

Description

Technical Field

[0001] The invention relates to a welding seam defect visual detection device, belonging to the technical field of petroleum tool detection. Background Art

[0002] Oil extraction refers to the act of digging and extracting oil from where it is stored. The extracted oil and gas flows from the reservoir to the bottom of the well, and then rises from the bottom of the well to the wellhead through the oil pipeline. Subsequently, the crude oil needs to be processed through oil and gas separation, dehydration and other processes. The processed crude oil will be directly transported to the refinery or transfer station through the oil pipeline for further processing or storage.

[0003] When crude oil in a pipeline is lifted from a low point to a high point, it must overcome gravity. This means that as the liquid rises, the column of liquid below it exerts a downward pressure on the liquid above it, known as hydrostatic pressure. As the height of the liquid increases, the weight of the column of liquid below also increases, and therefore the hydrostatic pressure generated increases. Therefore, as crude oil is transported upward, the pressure at the bottom of the pipeline will be much greater than the pressure at the top, so construction personnel must regularly inspect the pipeline to promptly detect and accurately assess the nature, location and severity of defects.

[0004] The inventors have discovered that the prior art has at least the following technical problems: After the oil pipeline has been running for a period of time, it is necessary to use a pipeline endoscope to insert it into the interior for inspection. The pipeline endoscope is a small, flexible optical device that can be directly inserted into the pipeline for observation. This method does not allow the endoscope to control the angle in the pipeline, is not easy to operate in the pipeline, and is not easy to make detailed judgments when erosion occurs. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a visual detection device for weld defects, which is directly sent into the oil pipe to form an internal visualization picture, conduct targeted flaw detection, determine the problem point more accurately, and directly carry out repairs after the problem is found, thereby greatly improving the detection efficiency.

[0006] The weld defect visual detection device of the present invention comprises: A support assembly, the support assembly includes a base made by assembling a number of plates, and the base is set in the shape of a regular hexagonal prism; A moving assembly, the moving assembly comprising driving legs respectively hinged to the side walls of the edge of the base, and moving wheels are installed at the ends of the driving legs; An adjustment assembly, the adjustment assembly includes an adjustment frame slidably mounted inside the base, a driving mechanism is mounted on the inner side of the end of the base, an output end of the driving mechanism can make the adjustment frame reciprocate inside the base, and an elastic member is hinged between the adjustment frame and the driving leg; A visualization component, the visualization component includes a plurality of light sources installed at the end of the base, the cameras are evenly installed at the end of the base in a ring shape, and a blocking cover is installed outside the corresponding plurality of cameras, and the blocking cover has a shooting hole corresponding to each camera; The nondestructive testing component includes a lifting frame installed on one of the side walls of the base, and a flaw detector is installed at the lifting end of the lifting frame.

[0007] Furthermore, the driving mechanism includes a mounting seat mounted on the inner side of the end of the base, a motor I is mounted on the mounting seat, a transmission screw is connected to the output end of the motor I, a matching transmission nut is mounted on the transmission screw, and the transmission nut is mounted on the adjustment frame; The end of the transmission screw rod away from the motor I is rotatably mounted on the end of the base.

[0008] Furthermore, the lifting frame includes a parallelogram mechanism installed on one of the side walls of the base, the parallelogram mechanism includes a fixed rod installed on the base, parallel rods are hinged on both sides of the fixed rod, connecting rods are hinged at the ends of the parallel rods, a flaw detector is installed on the connecting rod, and a lifting and telescopic cylinder is hinged between the lower end of the connecting rod and the base.

[0009] Furthermore, a fixing frame is installed on the connecting rod, a hinged plate is installed at the lower end of the fixing frame, the telescopic end of the lifting and telescopic cylinder is hinged on the hinged plate, a positioning frame is installed inside the base, the fixed end of the lifting and telescopic cylinder is hinged on the positioning frame, a fixing sleeve is installed in the middle of the fixing frame, and a flaw detector is installed in the fixing sleeve.

[0010] Furthermore, three driving legs are evenly installed in a ring on the outer ring side wall corresponding to the front side of the base, and three driving legs are evenly installed in a ring on the outer ring side wall corresponding to the rear side of the base. The three driving legs on the front side and the three driving legs on the rear side are staggered so that at least one driving leg is installed on each side wall.

[0011] Furthermore, two movable wheels arranged side by side are correspondingly installed at the end of the driving leg, and a motor II is installed inside the driving leg. The output end of the motor II is connected to the movable wheel through a bevel gear drive and a chain drive.

[0012] Furthermore, the moving wheel comprises a mounting frame, and a plurality of rolling bodies are evenly mounted on the edge of the mounting frame, and the axis of the rolling body is arranged at 45 degrees to the axis of the mounting frame.

[0013] Furthermore, an adjustment block is slidably installed inside the driving leg, and a motor II is installed on the adjustment block. The output end of the motor II extends into the adjustment block, and an input bevel gear is correspondingly installed on the output end of the motor II inside the adjustment block. A sprocket is rotatably installed on one side of the adjustment block, and the input end of the sprocket is located inside the adjustment block and an output bevel gear is installed. The input bevel gear cooperates with the output bevel gear for transmission.

[0014] Furthermore, the elastic member includes hinge blocks at both ends, a compression spring is installed between the hinge blocks, and the two hinge blocks are hinged to the side surfaces of the driving leg and the adjustment frame respectively.

[0015] Furthermore, an adjustment joint is provided between one of the hinge blocks and the compression spring, and the adjustment joint is threadedly connected to the hinge block.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a visualization component. After entering the oil pipe, the camera captures the inner wall through the shooting hole, and forms pictures in six directions. Defects are identified by computer or manually. After defects are found, they are detected by a portable flaw detector to determine the severity of the defects and whether the oil pipe needs to be repaired, thereby greatly improving the detection efficiency.

[0017] The present invention can better adapt to different oil pipe diameters through the moving components and the adjusting components, and can make the device more flexible inside the oil pipe through the moving wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention; Figure 2 This is one of the main views of Embodiment 1 of the present invention; Figure 3 is a schematic diagram of the internal structure of the visualization component of Example 1 of the present invention; Figure 4 This is the second front view of Embodiment 1 of the present invention; Figure 5 yes Figure 4 Full section view at AA in the middle; Figure 6 is a schematic diagram of the internal structure of the support assembly of Example 1 of the present invention; Figure 7 is a right side view of the interior of the support assembly of Example 1 of the present invention; Figure 8 is a schematic diagram of the structure of a mobile component of Embodiment 1 of the present invention; Fig. 9 is a schematic diagram of the internal structure of the mobile component of Example 1 of the present invention; Fig.10 is a front view of the mobile component of Example 1 of the present invention; Fig.11 yes Fig.10 Full section view at the middle BB; Fig.12 yes Fig.10 Full section view at CC; Fig.13 is a schematic diagram of a turning structure of Embodiment 1 of the present invention; In the figure: 1. Nondestructive testing components; 11. Flaw detector; 12. Lifting frame; 121. Connecting rod; 1211. Fixed frame; 1212. Fixed sleeve; 1213. Articulated plate; 122. Parallel rod; 123. Fixed rod; 124. Lifting and telescopic cylinder; 125. Positioning frame; 2. Moving assembly; 21. Driving leg; 211. Motor II; 212. Adjustment block; 213. Output bevel gear; 214. Input bevel gear; 215. Locking screw; 216. Adjustment slot; 22. Moving wheel; 221. Mounting frame; 222. Rolling element; 3. Adjustment assembly; 31. Elastic member; 311. Articulated block; 312. Adjustment joint; 313. Compression spring; 32. Adjustment frame; 33. Driving mechanism; 331. Transmission nut; 332. Transmission screw; 333. Motor I; 4. Support assembly; 41. Base; 42. Hexagonal support frame; 5. Visualization component; 51. Camera; 52. Light source; 53. Blocking cover; 531. Shooting hole; 54. Fixed seat; 55. Hexagonal seat. DETAILED DESCRIPTION

[0019] Example 1 like Figures 1 to 13 As shown, the weld defect visual detection device of the present invention comprises: Support assembly 4, support assembly 4 includes a base 41 assembled from a plurality of plates, the base 41 is in the shape of a regular hexagonal prism, and a hexagonal support frame 42 for mounting the plates is provided at both ends of the base 41, the hexagonal support frame 42 is made by welding, and a plurality of plates are fixed to the hexagonal support frame 42 by screws at both ends; The moving assembly 2 includes driving legs 21 respectively hinged to the side walls of the edge of the base 41, and moving wheels 22 are installed at the ends of the driving legs 21; The adjustment assembly 3 includes an adjustment frame 32 slidably mounted inside the base 41. A driving mechanism 33 is mounted on the inner side of the end of the base 41. The output end of the driving mechanism 33 can make the adjustment frame 32 reciprocate inside the base 41. An elastic member 31 is hinged between the adjustment frame 32 and the driving leg, and the elastic member 31 can make the moving wheel 22 better fit the inner wall of the oil pipe; The adjustment frame 32 is manufactured similarly to the base 41 and is installed by means of a plate and a slightly smaller hexagonal support frame 42 and fixed by screw connections.

[0020] Visualization component 5, the visualization component 5 includes a plurality of light sources 52 mounted on the end of the base 41, the cameras 51 are evenly mounted on the end of the base 41 in a ring shape, and a blocking cover 53 is installed outside corresponding to the plurality of cameras 51, and the blocking cover 53 has a shooting hole 531 corresponding to each camera 51; A hexagonal seat body 55 is installed at the end of the base 41, and the hexagonal seat body 55 is installed in the hexagonal support frame 42 at the end of the end base 41 by screw connection. The camera 51 is installed on the hexagonal seat body 55 through a fixing seat 54. The fixing seat 54 is located on both sides of the camera 51 and is equipped with a light source 52. The light source 52 can use an infrared lamp or a white light lamp to image the inner wall of the oil pipe.

[0021] The nondestructive testing component 1 includes a lifting frame 12 installed on one of the side walls of the base 41, and a flaw detector 11 is installed at the lifting end of the lifting frame 12.

[0022] The flaw detector 11 adopts an ultrasonic flaw detector. When targeted flaw detection is required, the flaw detector 11 is placed against the inner wall of the oil pipe.

[0023] The driving mechanism 33 includes a mounting seat mounted on the inner side of the end of the base 41, and a motor I 333 is mounted on the mounting seat. The motor I 333 adopts a servo motor, and the output end of the motor I 333 is connected to a transmission screw 332, and a matching transmission nut 331 is installed on the transmission screw 332, and the transmission nut 331 is mounted on the adjustment frame 32; One end of the transmission screw 332 away from the motor I 333 is rotatably mounted to the end of the base 41 .

[0024] The lifting frame 12 includes a parallelogram mechanism installed on one side wall of the base 41, and the parallelogram mechanism includes a fixed rod 123 installed on the base 41. Parallel rods 122 are hinged on both sides of the fixed rod 123, and connecting rods 121 are hinged at the ends of the parallel rods 122. The flaw detector 11 is installed on the connecting rod 121, and a lifting and telescopic cylinder 124 is hingedly installed between the lower end of the connecting rod 121 and the base 41.

[0025] A fixing frame 1211 is installed on the connecting rod 121, a hinged plate 1213 is installed at the lower end of the fixing frame 1211, the telescopic end of the lifting and telescopic cylinder 124 is hinged on the hinged plate 1213, a positioning frame 125 is installed inside the base 41, the fixed end of the lifting and telescopic cylinder 124 is hinged on the positioning frame 125, a fixing sleeve 1212 is installed in the middle of the fixing frame 1211, and the flaw detector 11 is installed in the fixing sleeve 1212.

[0026] Three driving legs 21 are evenly installed in a ring on the outer ring side wall corresponding to the front side of the base 41, and three driving legs 21 are evenly installed in a ring on the outer ring side wall corresponding to the rear side of the base 41. The three driving legs 21 on the front side and the three driving legs 21 on the rear side are staggered so that at least one driving leg 21 is installed on each side wall; Fig.13 As shown, when performing a turning operation, the moving wheels 22 on the corresponding surface of the base 41 can abut against the innermost and outermost inner walls, making the turning process smoother without getting stuck.

[0027] Two movable wheels 22 arranged side by side are correspondingly installed at the end of the driving leg 21. A motor II 211 is installed inside the driving leg 21. The motor II 211 adopts a servo motor. The output end of the motor II 211 is connected to the movable wheel 22 through a bevel gear drive and a chain drive.

[0028] The moving wheel 22 includes a mounting frame 221, and a plurality of rolling bodies 222 are evenly mounted on the edge of the mounting frame 221. The axis of the rolling body 222 is arranged at 45 degrees to the axis of the mounting frame 221. The existing finished Mecanum wheel can better enable the device to rotate, so that the flaw detector 11 can complete all-round detection.

[0029] An adjustment block 212 is slidably installed inside the driving leg 21, and a motor II 211 is installed on the adjustment block 212. The output end of the motor II 211 extends into the adjustment block 212, and an input bevel gear 214 is correspondingly installed on the output end of the motor II 211 inside the adjustment block 212. A sprocket is rotatably installed on one side of the adjustment block 212, and the input end of the sprocket is located inside the adjustment block 212 and an output bevel gear 213 is installed. The input bevel gear 214 cooperates with the output bevel gear 213 for transmission.

[0030] An adjustment slot 216 is provided on the driving leg 21, and a locking screw 215 is provided between the adjustment block 212 and the driving leg 21. The locking screw 215 passes through the adjustment slot and is screwed into the adjustment block 212. The chain in the chain drive is pre-tightened by the up and down movement of the adjustment block 212, thereby ensuring the stability of the transmission.

[0031] The elastic member 31 includes hinge blocks 311 at both ends, a compression spring 313 is installed between the hinge blocks 311 , and the two hinge blocks 311 are hinged to the side surfaces of the driving leg 21 and the adjustment frame 32 respectively.

[0032] An adjustment joint 312 is provided between one of the hinge blocks 311 and the compression spring 313 , and the adjustment joint 312 is threadedly connected to the hinge block 311 .

[0033] Working process or working principle: Device moving process: put the device into the inner hole of the oil pipe, and drive the transmission screw 332 to rotate through the action of motor I 333, and the transmission nut 331 moves, driving the adjustment frame 32 to move, and the adjustment frame 32 pushes the driving leg 21 to move, so that the moving wheel 22 is against the inner wall of the oil pipe. At this time, all motors II 211 are in action, and the motor is transmitted to the chain drive through the bevel gear drive, and then to the moving wheel through the chain drive. Through the characteristics of the Mename wheel, the steering of different motors II 211 can be controlled to realize the rotation of the device, which can adapt to turns in different directions and make the device more flexible.

[0034] Device photography visualization: During the slow movement of the device, the camera 51 configured at the front end is used for imaging, the inner wall is illuminated by the light source 52, and a square photo is taken through the shooting hole 531. The photo is synthesized by a computer or corrosion points or deformation points are directly found without synthesis. When the threaded connection of the oil pipe is reached, it can be checked by observation or directly detected by the flaw detector 11. Machine learning allows the computer to collect a large number of photos, and through continuous training and comparison by the computer, the computer can realize automatic comparison, and more accurate work can be achieved through alarms.

[0035] The position of the device in the oil pipe is determined by: The location of the device is confirmed by using existing methods such as magnetic positioning method, electromagnetic induction method or ultrasonic positioning method. The principle of magnetic positioning method: based on the magnetic anomaly phenomenon generated by ferromagnetic materials (such as iron pipes) in the external magnetic field, the pipeline position is located by measuring and analyzing these magnetic anomalies. The principle of electromagnetic induction method: using the principle of electromagnetic induction, by sending a current signal of a specific frequency into the pipeline, the electromagnetic field changes generated are measured outside the pipeline, thereby locating the position inside the pipeline. The principle of ultrasonic positioning method: using the physical phenomena of reflection and refraction when ultrasonic waves propagate in the pipeline, by measuring parameters such as the propagation time and intensity of ultrasonic waves, the specific position in the pipeline is located.

[0036] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A weld defect visual inspection device, characterized in that: include, A support assembly (4), the support assembly (4) comprising a base (41) assembled from a plurality of plates, the base (41) being in the shape of a regular hexagonal prism; A moving assembly (2), the moving assembly (2) comprising driving legs (21) respectively hinged to the side walls of the edge of the base (41), and moving wheels (22) are installed at the ends of the driving legs (21); An adjustment assembly (3), the adjustment assembly (3) comprising an adjustment frame (32) slidably mounted inside a base (41), a driving mechanism (33) being mounted on an inner side surface of an end of the base (41), an output end of the driving mechanism (33) enabling the adjustment frame (32) to reciprocate inside the base (41), and an elastic member (31) being hingedly connected between the adjustment frame (32) and the driving leg; A visualization component (5), the visualization component (5) comprising a plurality of light sources (52) mounted on the end of the base (41), the cameras (51) being evenly mounted on the end of the base (41) in a ring shape, a blocking cover (53) being mounted outside the plurality of cameras (51), and a shooting hole (531) being opened in the blocking cover (53) corresponding to each camera (51); A non-destructive testing component (1), the non-destructive testing component (1) comprising a lifting frame (12) mounted on one of the side walls of a base (41), a flaw detector (11) being mounted on a lifting end of the lifting frame (12).

2. The weld defect visual inspection device according to claim 1, characterized in that: The driving mechanism (33) comprises a mounting seat mounted on the inner side of the end of the base (41), a motor I (333) being mounted on the mounting seat, a transmission screw (332) being connected to the output end of the motor I (333), a matching transmission nut (331) being mounted on the transmission screw (332), and the transmission nut (331) being mounted on the adjustment frame (32); One end of the transmission screw rod (332) away from the motor I (333) is rotatably mounted on the end of the base (41).

3. The weld defect visual inspection device according to claim 1, characterized in that: The lifting frame (12) comprises a parallelogram mechanism mounted on one side wall of a base (41), the parallelogram mechanism comprising a fixed rod (123) mounted on the base (41), parallel rods (122) being hingedly connected on both sides of the fixed rod (123), connecting rods (121) being hingedly connected at the ends of the parallel rods (122), a flaw detector (11) being mounted on the connecting rod (121), and a lifting and telescopic cylinder (124) being hingedly mounted between the lower end of the connecting rod (121) and the base (41).

4. The weld defect visual inspection device according to claim 3, characterized in that: A fixing frame (1211) is installed on the connecting rod (121), a hinged plate (1213) is installed at the lower end of the fixing frame (1211), a telescopic end of a lifting and telescopic cylinder (124) is hingedly connected to the hinged plate (1213), a positioning frame (125) is installed inside the base (41), a fixed end of the lifting and telescopic cylinder (124) is hingedly connected to the positioning frame (125), a fixing sleeve (1212) is installed in the middle of the fixing frame (1211), and a flaw detector (11) is installed in the fixing sleeve (1212).

5. The weld defect visual inspection device according to claim 1, characterized in that: Three driving legs (21) are evenly mounted in a ring shape on the outer ring side wall corresponding to the front side of the base (41), and three driving legs (21) are evenly mounted in a ring shape on the outer ring side wall corresponding to the rear side of the base (41). The three driving legs (21) on the front side and the three driving legs (21) on the rear side are staggered so that at least one driving leg (21) is mounted on each side wall.

6. The weld defect visual inspection device according to claim 1, characterized in that: Two movable wheels (22) arranged side by side are correspondingly mounted at the ends of the driving legs (21), a motor II (211) is mounted inside the driving legs (21), and an output end of the motor II (211) is connected to the movable wheel (22) via a bevel gear drive and a chain drive.

7. The weld defect visual inspection device according to claim 6, characterized in that: The moving wheel (22) comprises a mounting frame (221), and a plurality of rolling bodies (222) are evenly mounted on the edge of the mounting frame (221), and the axis of the rolling bodies (222) is arranged at 45 degrees to the axis of the mounting frame (221).

8. The weld defect visual inspection device according to claim 6 or 7, characterized in that: An adjustment block (212) is slidably mounted inside the driving leg (21), a motor II (211) is mounted on the adjustment block (212), an output end of the motor II (211) extends into the adjustment block (212), an input bevel gear (214) is correspondingly mounted on the output end of the motor II (211) inside the adjustment block (212), a sprocket is rotatably mounted on one side of the adjustment block (212), an output bevel gear (213) is mounted on the input end of the sprocket located inside the adjustment block (212), and the input bevel gear (214) cooperates with the output bevel gear (213) for transmission.

9. The weld defect visual inspection device according to claim 1, characterized in that: The elastic member (31) comprises hinge blocks (311) at both ends, a compression spring (313) is installed between the hinge blocks (311), and the two hinge blocks (311) are hinged to the side surfaces of the driving leg (21) and the adjustment frame (32), respectively.

10. The weld defect visual inspection device according to claim 9, characterized in that: An adjustment joint (312) is provided between one of the hinge blocks (311) and the compression spring (313), and the adjustment joint (312) is threadedly connected to the hinge block (311).

Images