Oil and gas pipeline defect magnetic flux leakage internal detection device

Abstract

The utility model discloses an oil and gas pipeline defect magnetic flux leakage internal detection device, which relates to the technical field of pipeline internal detection, and comprises an equipment shell, a plurality of self-adjusting structures are arranged on the outer side wall of the equipment shell, rotating rods are rotatably connected to the two outer side walls of the equipment shell, a magnetic flux leakage detector body is fixedly connected to one rotating rod, and a magnetic flux leakage detector is fixedly connected to the other rotating rod. The other rotating rod is fixedly connected with a round block; according to the device, through the arrangement of the self-adjusting structure, when the diameter of the pipeline is changed, the device can detect various pipelines without replacing or adjusting equipment; according to the device, the magnetic flux leakage detector body is kept at the central position of the pipeline through mutual cooperation of the round rod and the linkage structure, so that measurement errors caused by deviation of equipment from the center are reduced; through mutual cooperation of a servo motor, a first bevel gear and a second bevel gear, the magnetic flux leakage detector body rotates, the inner wall of the oil and gas pipeline is detected more comprehensively, and meanwhile two cleaning brushes are driven to clean the inner wall of the oil and gas pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of in-pipe detection, in particular to a magnetic flux leakage in-pipe detection device for oil and gas pipeline defects. Background Technique

[0002] Oil and gas pipelines are special pipeline systems for transporting oil and natural gas. Because they can efficiently transport oil and gas resources from production sites to refineries, processing plants and other places, they play a crucial role in energy transportation. During the use of oil and gas pipelines, affected by the transportation medium, they are prone to corrosion, cracks or other defects. Usually, magnetic flux leakage in-pipe detection technology is required to detect internal defects of metal pipelines.

[0003] During the detection of oil and gas pipelines by existing magnetic flux leakage detection equipment, most can only detect pipelines with a fixed diameter. However, in the actual detection process, the diameter of the same pipeline may change, and it is necessary to replace it with other models of equipment for detection, resulting in poor applicability. Therefore, technical personnel in this field provide a magnetic flux leakage in-pipe detection device for oil and gas pipeline defects to solve the problems raised in the above background technique. Content of the Utility Model

[0004] The purpose of the utility model is to provide a magnetic flux leakage in-pipe detection device for oil and gas pipeline defects to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A magnetic flux leakage in-pipe detection device for oil and gas pipeline defects includes an equipment housing, a self-adjusting structure, a linkage structure and a cleaning structure. A number of self-adjusting structures are arranged on the outer side wall of the equipment housing. Rotating rods are rotatably connected to both outer side walls of the equipment housing. A magnetic flux leakage detector body is fixedly connected to one rotating rod, and a round block is fixedly connected to the other rotating rod. A number of cleaning structures are arranged on the outer wall of the round block. One end of the two rotating rods close to each other penetrates through the equipment housing and is fixedly connected with a driven gear. Linkage structures are arranged on both sides of the two driven gears close to each other inside the equipment housing. A storage battery is fixedly connected to the inner wall of the equipment housing.

[0007] As a further scheme of the utility model: The self-adjusting structure includes a round rod, a first connecting sleeve, a first slider, a first spring, a first connecting rod, a cylinder, a brushless motor and a moving wheel. A number of first connecting sleeves are fixedly connected to the outer side wall of the equipment housing. A first slider is slidably connected inside the first connecting sleeve. A round rod is fixedly connected to one end of the first slider close to the equipment housing. A first spring is arranged on the round rod between the first slider and the outer side wall of the equipment housing.

[0008] As a further solution of the present utility model: One end of the first slider away from the equipment housing is fixedly connected with a first connecting rod. One end of the first connecting rod away from the equipment housing is fixedly connected with a cylinder. Two brushless motors are fixedly connected inside the cylinder. The output ends of the brushless motors are fixedly connected with moving wheels.

[0009] As a further solution of the present utility model: The linkage structure includes a first rotating shaft, a sector-shaped connecting block, a linkage rod, a vertical rod, a sliding plate and a hinge. Two first rotating shafts are rotatably connected to the inner wall of the equipment housing. Two sector-shaped connecting blocks are symmetrically and fixedly connected to the first rotating shaft. A linkage rod is rotatably connected to the sector-shaped connecting block. Vertical rods are fixedly connected to both sides of the equipment housing where the two first rotating shafts are away from each other. Two sliding plates are slidably connected to the vertical rods.

[0010] As a further solution of the present utility model: One end of the sliding plate close to the first rotating shaft is fixedly connected with a hinge, and the hinge is rotatably connected to the linkage rod. One end of the sliding plate away from the first rotating shaft is fixedly connected with a round rod.

[0011] As a further solution of the present utility model: The cleaning structure includes a second connecting sleeve, a second spring, a second slider, a second connecting rod and a cleaning brush. Two second connecting sleeves are symmetrically and fixedly connected to the outer wall of the round block. A second spring is fixedly connected inside the second connecting sleeve. A second slider is slidably connected inside the second connecting sleeve. One end of the second slider close to the round block is fixedly connected with the second spring.

[0012] As a further solution of the present utility model: One end of the second slider away from the round block is fixedly connected with a second connecting rod. One end of the second connecting rod away from the round block is fixedly connected with a cleaning brush, and the cleaning brush is arc-shaped.

[0013] As a further solution of the present utility model: Limit plates are fixedly connected to both sides of the equipment housing where the two first rotating shafts are close to each other. Second rotating shafts are rotatably connected to one ends of the two limit plates away from each other. Driving gears are fixedly connected to one ends of the two second rotating shafts away from each other. The driving gears are meshed with driven gears.

[0014] As a further solution of the present utility model: One ends of the two first rotating shafts close to each other penetrate through the limit plates and are fixedly connected with first bevel gears. A servo motor is fixedly connected to the inner wall of the equipment housing. A second bevel gear is fixedly connected to the output end of the servo motor. The two first bevel gears are meshed with the second bevel gear.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] 1. The device enables the positions of several moving wheels to change with the changes of the pipeline through the setting of the self-adjusting structure. When the device housing moves to a section of the pipeline with an inward contraction, the moving wheels, cylinder, first connecting rod, and first slider will move towards the device housing. At this time, several first springs are compressed and deformed. When the device housing moves to pipeline sections with other diameters subsequently, the several moving wheels will always be in contact with the inner wall of the oil and gas pipeline under the action of the several first springs, enabling the device to perform various pipeline detections without replacing or adjusting the device when the diameter of the pipeline changes, significantly improving the versatility and adaptability of the device;

[0017] 2. The device makes the magnetic flux leakage detector body maintain at the central position of the pipeline through the mutual cooperation of the round rod and the linkage structure. When the device housing moves to a section of the pipeline with an inward contraction, the first slider will drive the round rod to move into the device housing, and then drive the sliding plate and the hinge to move towards the first rotating shaft. With the mutual cooperation of the hinge, linkage rod, and sector connecting block, the first rotating shaft is driven to rotate. Through the interaction of the round rod, sliding plate, hinge, linkage rod, sector connecting block, etc., the magnetic flux leakage detector body can be maintained at the central position of the oil and gas pipeline when the device housing moves to different diameter sections, reducing the measurement error caused by the device deviating from the center and ensuring the consistency and accuracy of the data;

[0018] 3. The device drives the two second rotating shafts and the driving gear to rotate through the mutual cooperation of the servo motor, first bevel gear, and second bevel gear. With the meshing of the driving gear and the driven gear, the two rotating rods are driven to rotate, and then the magnetic flux leakage detector body rotates during the detection process to conduct a more comprehensive detection of the inner wall of the oil and gas pipeline. At the same time, the other rotating rod drives the round block to rotate, and then drives the two cleaning brushes to clean the inner wall of the oil and gas pipeline;

[0019] 4. The device drives the cleaning brush to clean the inner wall of pipelines with different diameters through the setting of the cleaning structure. Through the mutual cooperation of the second spring, second slider, and second connecting rod, the cleaning brush can clean the pipelines with different diameters. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of an internal magnetic flux leakage detector for oil and gas pipeline defects.

[0021] Figure 2 It is an enlarged view of A in an internal magnetic flux leakage detector for oil and gas pipeline defects.

[0022] Figure 3 It is an enlarged view of B in an internal magnetic flux leakage detector for oil and gas pipeline defects.

[0023] Figure 4It is a rear view sectional view of the equipment housing in a magnetic flux leakage internal detection device for oil and gas pipeline defects.

[0024] Figure 5 It is a side view sectional view of a magnetic flux leakage internal detection device for oil and gas pipeline defects.

[0025] Figure 6 It is an enlarged view of C in a magnetic flux leakage internal detection device for oil and gas pipeline defects.

[0026] In the figure: 1. Equipment housing; 2. First rotating shaft; 3. Sector connecting block; 4. Linking rod; 5. Vertical rod; 6. Slide plate; 7. Hinge; 8. Round rod; 9. First connecting sleeve; 10. First slider; 11. First spring; 12. First connecting rod; 13. Cylinder; 14. Brushless motor; 15. Moving wheel; 16. Rotating rod; 17. Driven gear; 18. Limiting plate; 19. Second rotating shaft; 20. Driving gear; 21. First bevel gear; 22. Servo motor; 23. Second bevel gear; 24. Magnetic flux leakage detector body; 25. Round block; 26. Second connecting sleeve; 27. Second spring; 28. Second slider; 29. Second connecting rod; 30. Cleaning brush; 31. Battery. Specific implementation mode

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model. Embodiment 1

[0028] Referring to Figure 1-3 , this embodiment provides a magnetic flux leakage internal detection device for oil and gas pipeline defects, including an equipment housing 1, a self-adjusting structure, a linkage structure, and a cleaning structure. A plurality of self-adjusting structures are arranged on the outer side wall of the equipment housing 1. Rotating rods 16 are rotatably connected to both outer side walls of the equipment housing 1. A magnetic flux leakage detector body 24 is fixedly connected to one rotating rod 16, and a round block 25 is fixedly connected to the other rotating rod 16. A plurality of cleaning structures are arranged on the outer wall of the round block 25. The closer ends of the two rotating rods 16 penetrate the equipment housing 1 and are fixedly connected to driven gears 17. Linkage structures are arranged on both sides of the equipment housing 1 and close to the two driven gears 17. A battery 31 is fixedly connected to the inner wall of the equipment housing 1.

[0029] Specifically, in this embodiment, the self-adjusting structure includes a round rod 8, a first connecting sleeve 9, a first slider 10, a first spring 11, a first connecting rod 12, a cylinder 13, a brushless motor 14 and a moving wheel 15. A plurality of first connecting sleeves 9 are fixedly connected to the outer side wall of the equipment housing 1. The first slider 10 is slidably connected inside the first connecting sleeve 9. One end of the first slider 10 close to the equipment housing 1 is fixedly connected to the round rod 8. A first spring 11 is arranged between the round rod 8 and the outer side wall of the equipment housing 1. One end of the first slider 10 away from the equipment housing 1 is fixedly connected to the first connecting rod 12. One end of the first connecting rod 12 away from the equipment housing 1 is fixedly connected to the cylinder 13. Two brushless motors 14 are fixedly connected inside the cylinder 13. The output end of the brushless motor 14 is fixedly connected to the moving wheel 15.

[0030] The linkage structure includes a first rotating shaft 2, a sector connecting block 3, a linkage rod 4, a vertical rod 5, a sliding plate 6 and a hinge 7. Two first rotating shafts 2 are rotatably connected to the inner wall of the equipment housing 1. Two sector connecting blocks 3 are symmetrically fixedly connected to the first rotating shaft 2. The linkage rod 4 is rotatably connected to the sector connecting block 3. Vertical rods 5 are fixedly connected to both sides of the two first rotating shafts 2 in the equipment housing 1. Two sliding plates 6 are slidably connected to the vertical rods 5. One end of the sliding plate 6 close to the first rotating shaft 2 is fixedly connected to the hinge 7. The hinge 7 is rotatably connected to the linkage rod 4. One end of the sliding plate 6 away from the first rotating shaft 2 is fixedly connected to the round rod 8.

[0031] When the device is used to detect the magnetic flux leakage defects of the oil and gas pipeline, the brushless motor 14 is controlled to drive a plurality of moving wheels 15 to rotate, so as to drive the equipment housing 1 to move in the pipeline. When the equipment housing 1 moves to a section of the pipeline with an inward contraction, the moving wheels 15, the cylinder 13, the first connecting rod 12 and the first slider 10 will move towards the equipment housing 1. At this time, a plurality of first springs 11 are compressed and deformed. When the equipment housing 1 moves to other pipeline sections with different diameters later, a plurality of moving wheels 15 will always be in contact with the inner wall of the oil and gas pipeline under the action of the plurality of first springs 11, so that the device can perform various pipeline detections without replacing or adjusting the equipment when the diameter of the pipeline changes, significantly improving the versatility and adaptability of the device. When the equipment housing 1 moves to a section of the pipeline with an inward contraction, the first slider 10 will drive the round rod 8 to move into the equipment housing 1, and then drive the sliding plate 6 and the hinge 7 to move towards the first rotating shaft 2. With the mutual cooperation of the hinge 7, the linkage rod 4 and the sector connecting block 3, the first rotating shaft 2 is driven to rotate. Through the interaction of the round rod 8, the sliding plate 6, the hinge 7, the linkage rod 4 and the sector connecting block 3, the magnetic flux leakage detector body 24 can be kept at the center position of the oil and gas pipeline when the equipment housing 1 moves to different diameter sections, reducing the measurement error caused by the deviation of the equipment from the center and ensuring the consistency and accuracy of the data. Embodiment 2

[0032] Referring to Figure 4-6 , this embodiment is based on the previous embodiment. The difference from the previous embodiment is that the cleaning structure includes a second connecting sleeve 26, a second spring 27, a second slider 28, a second connecting rod 29, and a cleaning brush 30. Two second connecting sleeves 26 are symmetrically and fixedly connected to the outer wall of the round block 25. A second spring 27 is fixedly connected inside the second connecting sleeve 26. A second slider 28 is slidably connected inside the second connecting sleeve 26. One end of the second slider 28 close to the round block 25 is fixedly connected to the second spring 27. One end of the second connecting rod 29 away from the round block 25 is fixedly connected to the cleaning brush 30. The cleaning brush 30 is arc-shaped. Inside the equipment housing 1 and on both sides close to the two first rotating shafts 2, limiting plates 18 are fixedly connected. Second rotating shafts 19 are rotatably connected to the ends of the two limiting plates 18 away from each other. Driving gears 20 are fixedly connected to the ends of the two second rotating shafts 19 away from each other. The driving gears 20 are meshed with the driven gears 17. One end of each of the two first rotating shafts 2 close to each other penetrates through the limiting plate 18 and is fixedly connected to a first bevel gear 21. A servo motor 22 is fixedly connected to the inner wall of the equipment housing 1. A second bevel gear 23 is fixedly connected to the output end of the servo motor 。

[0033] When the equipment housing 1 moves in the oil and gas pipeline, detection is carried out by the magnetic flux leakage detector body 24. During the detection process, the servo motor 22 can be started. The servo motor 22 drives the second bevel gear 23 to rotate. With the meshing of the two first bevel gears 21 and the second bevel gear 23, the two second rotating shafts 19 and the driving gears 20 are driven to rotate. With the meshing of the driving gears 20 and the driven gears 17, the two rotating rods 16 are driven to rotate, so that the magnetic flux leakage detector body 24 rotates during the detection process to perform a more comprehensive detection of the inner wall of the oil and gas pipeline. At the same time, the other rotating rod 16 drives the round block 25 to rotate, and then drives the two cleaning brushes 30 to clean the inner wall of the oil and gas pipeline. Through the mutual cooperation of the second spring 27, the second slider 28, and the second connecting rod 29, the cleaning brush 30 can clean pipelines with different diameters to improve the applicability of the device.

[0034] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0035] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An internal magnetic flux leakage detection device for oil and gas pipeline defects, comprising an equipment housing (1), a self-adjusting structure, a linkage structure and a cleaning structure, characterized in that, A number of self - adjusting structures are provided on the outer side wall of the equipment housing (1). Rotating rods (16) are rotatably connected to both outer side walls of the equipment housing (1). A magnetic flux leakage detector body (24) is fixedly connected to one rotating rod (16), and a round block (25) is fixedly connected to the other rotating rod (16). A number of cleaning structures are provided on the outer wall of the round block (25). One end of each of the two rotating rods (16) close to each other penetrates through the equipment housing (1) and is fixedly connected to a driven gear (17). Linkage structures are provided on both sides of the equipment housing (1) interior where the two driven gears (17) are close to each other. A storage battery (31) is fixedly connected to the inner wall of the equipment housing (1). The self - adjusting structure includes a round rod (8), a first connecting sleeve (9), a first slider (10), a first spring (11), a first connecting rod (12), a cylinder (13), a brushless motor (14) and a moving wheel (15). A number of first connecting sleeves (9) are fixedly connected to the outer side wall of the equipment housing (1). A first slider (10) is slidably connected inside the first connecting sleeve (9). One end of the first slider (10) close to the equipment housing (1) is fixedly connected to a round rod (8). A first spring (11) is provided between the round rod (8) and the outer side wall of the equipment housing (1) with the first slider (10) therebetween.

2. The magnetic flux leakage internal detection device for oil and gas pipeline defects according to claim 1, characterized in that, One end of the first slider (10) away from the equipment housing (1) is fixedly connected to a first connecting rod (12). One end of the first connecting rod (12) away from the equipment housing (1) is fixedly connected to a cylinder (13). Two brushless motors (14) are fixedly connected inside the cylinder (13), and the output end of the brushless motor (14) is fixedly connected to a moving wheel (15).

3. The magnetic flux leakage internal detection device for oil and gas pipeline defects according to claim 1, characterized in that The linkage structure includes a first rotating shaft (2), a sector - shaped connecting block (3), a linkage rod (4), a vertical rod (5), a sliding plate (6) and a hinge (7). Two first rotating shafts (2) are rotatably connected to the inner wall of the equipment housing (1). Two sector - shaped connecting blocks (3) are symmetrically fixedly connected to the first rotating shaft (2). A linkage rod (4) is rotatably connected to the sector - shaped connecting block (3). Vertical rods (5) are fixedly connected to both sides of the equipment housing (1) interior where the two first rotating shafts (2) are away from each other. Two sliding plates (6) are slidably connected to the vertical rod (5).

4. The magnetic flux leakage internal detection device for oil and gas pipeline defects according to claim 3, characterized in that, One end of the sliding plate (6) close to the first rotating shaft (2) is fixedly connected to a hinge (7), and the hinge (7) is rotatably connected to the linkage rod (4). One end of the sliding plate (6) away from the first rotating shaft (2) is fixedly connected to the round rod (8).

5. The magnetic flux leakage internal detection device for oil and gas pipeline defects according to claim 1, characterized in that, The cleaning structure includes a second connecting sleeve (26), a second spring (27), a second slider (28), a second connecting rod (29), a cleaning brush (30). Two second connecting sleeves (26) are symmetrically fixedly connected to the outer wall of the round block (25). A second spring (27) is fixedly connected inside the second connecting sleeve (26). A second slider (28) is slidably connected inside the second connecting sleeve (26). One end of the second slider (28) close to the round block (25) is fixedly connected to the second spring (27).

6. The magnetic flux leakage internal detection device for oil and gas pipeline defects according to claim 5, characterized in that One end of the second slider (28) far from the circular block (25) is fixedly connected with a second connecting rod (29), one end of the second connecting rod (29) far from the circular block (25) is fixedly connected with a cleaning brush (30), and the cleaning brush (30) is arc-shaped.

7. An internal magnetic flux leakage detection device for oil and gas pipeline defects according to claim 1, characterized in that, Inside the equipment housing (1) and on both sides close to each other of the two first rotating shafts (2), limit plates (18) are fixedly connected. Second rotating shafts (19) are rotatably connected to the ends of the two limit plates (18) far from each other. One end of each of the two second rotating shafts (19) far from each other is fixedly connected with a driving gear (20), and the driving gear (20) is meshed with the driven gear (17).

8. An internal magnetic flux leakage detection device for oil and gas pipeline defects according to claim 3, characterized in that, One end of each of the two first rotating shafts (2) close to each other penetrates through the limit plate (18) and is fixedly connected with a first bevel gear (21). A servo motor (22) is fixedly connected to the inner wall of the equipment housing (1), and a second bevel gear (23) is fixedly connected to the output end of the servo motor (22). The two first bevel gears (21) are both meshed with the second bevel gear (23).

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