Submarine pipeline magnetic flux leakage internal detection device

Abstract

The utility model relates to the technical field of detection devices, in particular to a submarine pipeline magnetic flux leakage internal detection device, which comprises supporting slide rails, a servo motor, a driving screw rod and a driven screw rod, the outer side of each supporting column is provided with the supporting slide rail, and the bottom surface of each supporting slide rail is fixed on the top surface of a traction frame. Connecting shells are fixed between the lower portions of the two supporting sliding rails below the two inner supporting frames in a penetrating mode, and connecting shells are fixed between the supporting sliding rails below the inner supporting frames and the upper portions of the supporting sliding rails below the outer sleeve frame in a penetrating mode. By arranging the limiting and fixing assembly, when the traction frame drives the magnetic flux leakage detector to move, the stability of the traction frame during movement can be guaranteed through a limiting ball at the top, and when it is detected that defects need to be accurately positioned, a servo motor drives the limiting ball to move downwards and drives a limiting supporting plate to abut against the inner wall of a pipeline at the same time; therefore, the magnetic flux leakage detector can be fixed, accurate positioning of the magnetic flux leakage detector is facilitated, and the detection stability and accuracy of the submarine pipeline magnetic flux leakage internal detection device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a submarine pipeline magnetic leakage internal detection device. Background Art

[0002] Magnetic flux leakage testing refers to the process in which a ferromagnetic material is magnetized and a leakage magnetic field is formed on its surface due to defects on or near the surface of the test piece. People can detect defects by detecting changes in the leakage magnetic field. Pipeline magnetic flux leakage testing technology uses permanent magnets evenly arranged around the circumference to saturate the pipe wall. When there are no defects in the pipe wall, the magnetic lines of force are confined within the pipe wall. When there are defects in the pipe wall, the magnetic lines of force pass through the pipe wall, generating leakage magnetic field. Sensors are used to collect the leakage magnetic field signal to achieve the detection purpose. It is widely used in various pipeline inspections.

[0003] The currently used pipeline magnetic flux leakage internal detection device can only enter one end of the pipeline during detection. Since submarine pipelines are generally long, the magnetic flux leakage detector needs to be brought into the pipeline via a frame. When defects are detected after entering the pipeline, the defects cannot be accurately located. In addition, since the interior of the pipeline is a curved surface, the frame is not stable when driving inside. Under the vibration transmission of seawater, it is also impossible to stably stop and perform accurate positioning detection. In view of the above-mentioned defects, the present utility model is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a submarine pipeline magnetic leakage internal detection device to solve the problem raised.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a device for detecting magnetic flux leakage inside a submarine pipeline, comprising a magnetic flux leakage detector and a pulling frame, wherein the magnetic flux leakage detector is fixed to the top surface of the pulling frame by bolts, an inner support frame is provided above the magnetic flux leakage detector, and an outer frame is provided on the outside of the inner support frame, and the four corners of the top surface of the inner support frame are detachably fixed with limited support plates by bolts, which are used to fix the magnetic flux leakage detector against the inner wall of the pipeline, and the four corners of the top surface of the outer frame are fixed with fixing screw sleeves, and the interior of the fixing screw sleeves is threaded with fixing screws, and the top of each fixing screw is rotatably sleeved with a limiting ball for limiting support of the pulling frame;

[0006] Support columns are symmetrically fixed on both sides of the bottom surface of the pulling frame and the inner support frame, and the outer sides of the support columns are connected to the top surface of the pulling frame through lifting components to adjust the height of the limiting balls and the limiting support plates.

[0007] Preferably, the lifting assembly includes a supporting slide rail, a servo motor, an active screw and a driven screw. A supporting slide rail is provided on the outside of each support column, and the bottom surface of the supporting slide rail is fixed to the top surface of the pulling frame. A connecting shell is fixed between the lower parts of the two supporting slide rails under the two inner support frames, and between the supporting slide rail under the inner support frame and the upper part of the supporting slide rail under the outer frame. An active screw is rotatably connected to the inside of any supporting slide rail on each side through a bearing, and a servo motor is provided inside the pulling frame below the active screw. The active screw rotates through the pulling frame and is fixed on On the output end of the servo motor, the interior of the other supporting slide rails on each side is rotatably connected to a driven screw through a bearing, and a movable sleeve is threadedly sleeved on the active screw and each driven screw, and the end of the movable sleeve extending to the outside of the supporting slide rail is fixed to the inner wall of the support column, and a pulley is fixed on the active screw and the driven screw on both sides of each connecting shell, and the two pulleys are connected by a transmission belt, and the two active screws pass through one end of the lower part of the pulling frame and are fixed with another pulley, and the other two pulleys are connected by another transmission belt.

[0008] Preferably, a fixed front frame is symmetrically fixed to the forward end of the pulling frame, and a push plate is provided on the outside of the fixed front frame. A connecting plate is fixed to the outside of each fixed front frame by bolts, and the side of the connecting plate is fixed to the inner wall of the push plate.

[0009] Preferably, the support slide rail and the active screw under the inner support frame have opposite thread directions to the driven screw under the outer frame, and are used to drive the limiting balls and the limiting support plate to move up and down in opposite directions. The height of each support column and support slide rail is greater than the height of the leakage magnetic detector.

[0010] Preferably, the outer frame is configured as a rectangle that is sleeved on the outside of the inner support frame, the top surface of each limiting support plate is configured as an arc that cooperates with the inner wall of the pipe, and each fixing screw is provided with a rotating hole that cooperates with the limiting ball.

[0011] Preferably, each of the supporting slide rails is provided with a transversely placed "convex"-shaped slide groove that cooperates with the movable sleeve block, and each of the movable sleeve blocks is provided with a threaded hole that cooperates with the active screw and the driven screw.

[0012] Preferably, another connecting shell is provided on the outer side of the other pulley and the transmission belt, and the other connecting shell is fixed on the bottom surface of the pulling frame. Both of the two active screws rotate through the other connecting shell and are fixed on the output end of the servo motor, and each of the connecting shells is provided with a movable groove that cooperates with the transmission belt.

[0013] Preferably, the push plate is configured to be an arc that expands outward away from the pulling frame, the width of the push plate is smaller than the width of the pulling frame and larger than the width of the magnetic flux leakage detector, and the heights of the fixed front frame and the connecting plate are both smaller than the height of the push plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model is provided with a limit and fixing component. When the pulling frame drives the magnetic flux leakage detector to move, the limit ball on the top can ensure the stability of the pulling frame during movement. When a defect is detected and needs to be accurately positioned, the servo motor drives the limit ball to move downward, and at the same time drives the limit support plate to abut against the inner wall of the pipeline, so that the magnetic flux leakage detector can be fixed, which facilitates the precise positioning of the magnetic flux leakage detector and improves the stability and accuracy of the detection of the magnetic flux leakage internal detection device of the submarine pipeline.

[0016] 2. In the present invention, the front support plate can prevent debris inside the pipeline from causing it to be unable to move forward or even damaged when the pulling frame moves, thereby better protecting the pulling frame and the magnetic leakage detector, while avoiding affecting the normal movement of the pulling frame. The detachable limit ball and limit pressure plate on the top can be replaced according to the arc shape of the inner wall of the pipeline, thereby improving the applicability of the submarine pipeline magnetic leakage internal detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the left side of the three-dimensional structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the right side of the three-dimensional structure of the utility model;

[0019] Figure 3 This is a bottom view schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 4 It is a schematic front view of the local structure of the utility model.

[0021] The numbers in the figure represent:

[0022] 1. Magnetic flux leakage detector; 2. Pulling frame; 3. Inner support frame; 4. Outer frame; 5. Fixed screw sleeve; 6. Fixed screw; 7. Limiting ball; 8. Limiting support plate; 9. Support column; 10. Support slide rail; 11. Connecting shell; 12. Servo motor; 13. Active screw; 14. Driven screw; 15. Moving sleeve; 16. Pulley; 17. Drive belt; 18. Fixed front frame; 19. Push plate; 20. Connecting plate. DETAILED DESCRIPTION

[0023] The following further illustrates the above and other technical features and advantages of the present invention in conjunction with the accompanying drawings and embodiments. However, the following embodiments are merely preferred embodiments of the present invention and are not exhaustive. Example

[0024] like Figure 1-4 As shown, the utility model provides a submarine pipeline magnetic flux leakage internal detection device, including a magnetic flux leakage detector 1 and a pulling frame 2, the magnetic flux leakage detector 1 is fixed to the top surface of the pulling frame 2 by bolts, an inner support frame 3 is provided above the magnetic flux leakage detector 1, and an outer frame 4 is provided on the outside of the inner support frame 3, the four corners of the top surface of the inner support frame 3 are detachably fixed with a limited support plate 8 by bolts, which is used to abut against the inner wall of the pipeline to fix the magnetic flux leakage detector 1, the four corners of the top surface of the outer frame 4 are fixed with a fixing screw sleeve 5, and the inside of the fixing screw sleeve 5 is threaded with a fixing screw 6, and the top of each fixing screw 6 is rotatably sleeved with a limiting ball 7 for limiting support of the pulling frame 2;

[0025] The supporting columns 9 are symmetrically fixed on both sides of the bottom surface of the pulling frame 2 and the inner support frame 3, and the outer sides of the supporting columns 9 are connected to the top surface of the pulling frame 2 through the lifting assembly, which is used to adjust the height of the limiting balls 7 and the limiting support plates 8. When the pulling frame 2 drives the magnetic flux leakage detector 1 to move normally, the lifting assembly drives the limiting balls 7 to abut against the inner wall of the pipe and rolls with the movement of the magnetic flux leakage detector 1, so as to support and limit the pulling frame 2, thereby ensuring the stability of the pulling frame 2 when moving. When the pulling frame 2 stops, the lifting assembly drives the limiting balls 7 to move downward and drives the limiting support plates 8 to abut against the inner wall of the pipe, so as to fix the magnetic flux leakage detector 1;

[0026] The lifting assembly includes a supporting slide rail 10, a servo motor 12, a driving screw 13 and a driven screw 14. A supporting slide rail 10 is provided on the outside of each support column 9, and the bottom surface of the supporting slide rail 10 is fixed to the top surface of the pulling frame 2. A connecting shell 11 is fixed between the lower parts of the two supporting slide rails 10 under the two inner support frames 3, and between the supporting slide rail 10 under the inner support frame 3 and the upper part of the supporting slide rail 10 under the outer frame 4. The interior of any supporting slide rail 10 on each side is rotatably connected to the driving screw 13 through a bearing, and a servo motor 12 is provided inside the pulling frame 2 below the driving screw 13. The driving screw 13 rotates through the pulling frame 2 and is fixed on the output end of the servo motor 12. The interiors of the remaining supporting slide rails 10 on each side are rotatably connected to the driven screw 14 through bearings. The driving screw 13 and Each driven screw 14 is threadedly sleeved with a movable sleeve 15, and the end of the movable sleeve 15 extending to the outside of the support slide 10 is fixed to the inner wall of the support column 9. A pulley 16 is fixed to the active screw 13 and the driven screw 14 on both sides of each connecting shell 11, and the two pulleys 16 are connected by a transmission belt 17. The two active screws 13 pass through one end of the lower part of the pulling frame 2 and are fixed with another pulley 16. The two other pulleys 16 are connected by another transmission belt 17. The thread directions of the support slide 10 and the active screw 13 under the inner support frame 3 are opposite to those of the driven screw 14 under the outer frame 4, which are used to drive the limiting ball 7 and the limiting support plate 8 to move up and down in opposite directions. The height of each support column 9 and the support slide 10 is greater than the height of the leakage magnetic detector 1.

[0027] When it is necessary to drive the limiting ball 7 or the limiting support plate 8 to rise or fall, the servo motor 12 runs through another pulley 16 and a transmission belt 17 to drive the active screws 13 on both sides to rotate. When the active screw 13 rotates, the other driven screws 14 are driven to rotate through the pulley 16 and the transmission belt 17. When the driven screw 14 rotates, under the action of the opposite threads on its surface, it drives the inner support frame 3 and the outer frame 4 to move up and down in opposite directions, driving the limiting ball 7 and the limiting support plate 8 to rise and fall respectively.

[0028] The forward end of the pulling frame 2 is symmetrically fixed with a fixed front frame 18, and a push plate 19 is provided on the outer side of the fixed front frame 18. A connecting plate 20 is fixed to the outer side of each fixed front frame 18 by bolts, and the side of the connecting plate 20 is fixed to the inner wall of the push plate 19. The push plate 19 is arranged to be an arc expanding outward toward the side away from the pulling frame 2. The width of the push plate 19 is smaller than the width of the pulling frame 2 and larger than the width of the magnetic flux leakage detector 1. The height of the fixed front frame 18 and the connecting plate 20 is smaller than the height of the push plate 19. When the pulling frame 2 moves, it pushes the push plate 19 to move. When the push plate 19 moves, it can push the debris on the forward path of the pulling frame 2, thereby protecting the pulling frame 2.

[0029] The outer frame 4 is configured as a rectangle that is sleeved on the outside of the inner support frame 3. The top surface of each of the limiting support plates 8 is configured as an arc that matches the inner wall of the pipe. Each of the fixing screws 6 is provided with a rotation hole that matches the limiting ball 7 to avoid mutual interference between the inner support frame 3 and the outer frame 4, and to ensure that the limiting support plates 8 can abut against the inner wall of the pipe. The pulling frame 2 is fixed through a sufficient contact area to ensure the stability of the pulling frame 2 when it stops, thereby avoiding vibration caused by the flow of seawater on the pipe.

[0030] Each of the support rails 10 is provided with a transversely placed "convex" shaped groove that cooperates with the movable sleeve 15. Each of the movable sleeves 15 is provided with a threaded hole that cooperates with the active screw 13 and the driven screw 14, so that the movable sleeve 15 can move inside the support rail 10 and the active screw 13 and the driven screw 14 can drive the movable sleeve 15 to move up and down.

[0031] Another connecting shell 11 is provided on the outside of the other pulley 16 and the transmission belt 17. The other connecting shell 11 is fixed to the bottom surface of the pulling frame 2. The two active screws 13 are rotated through the other connecting shell 11 and are fixed to the output end of the servo motor 12. A movable groove that cooperates with the transmission belt 17 is opened inside each of the connecting shells 11. The other pulley 16 and the transmission belt 17 inside the pulling frame 2 are protected by the other connecting shell 11, thereby further improving the safety of the detection device during use.

[0032] The above description is merely a preferred embodiment of the present invention and is intended to be illustrative rather than restrictive of the present invention. Those skilled in the art will appreciate that many changes, modifications, and even equivalents may be made to the present invention within the spirit and scope of the claims, and all of these changes will fall within the scope of protection of the present invention.

Claims

1. A submarine pipeline magnetic leakage internal detection device, characterized in that: It comprises a magnetic flux leakage detector (1) and a pulling frame (2), wherein the magnetic flux leakage detector (1) is fixed to the top surface of the pulling frame (2) by bolts, an inner support frame (3) is provided above the magnetic flux leakage detector (1), and an outer frame (4) is provided on the outer side of the inner support frame (3), and a limited support plate (8) is fixed at the four corners of the top surface of the inner support frame (3) by bolts in a detachable manner, and is used to fix the magnetic flux leakage detector (1) against the inner wall of the pipeline, and a fixing screw sleeve (5) is fixed at the four corners of the top surface of the outer frame (4), and a fixing screw (6) is threadedly provided inside the fixing screw sleeve (5), and a limiting ball (7) is rotatably sleeved on the top of each fixing screw (6) for providing limiting support for the pulling frame (2); Support columns (9) are symmetrically fixed on both sides of the bottom surfaces of the pulling frame (2) and the inner support frame (3), and the outer sides of the support columns (9) are connected to the top surface of the pulling frame (2) through lifting components for adjusting the height of the limiting balls (7) and the limiting support plate (8).

2. A submarine pipeline magnetic flux leakage internal detection device according to claim 1, characterized in that: The lifting assembly includes a supporting slide rail (10), a servo motor (12), an active screw rod (13) and a driven screw rod (14). A supporting slide rail (10) is provided on the outside of each supporting column (9), and the bottom surface of the supporting slide rail (10) is fixed to the top surface of the pulling frame (2). A connecting shell (11) is fixed between the lower parts of the two supporting slide rails (10) below the two inner support frames (3) and between the supporting slide rail (10) below the inner support frame (3) and the upper part of the supporting slide rail (10) below the outer frame (4). An active screw rod (13) is rotatably connected to the inside of any supporting slide rail (10) on each side through a bearing, and a servo motor (12) is provided inside the pulling frame (2) below the active screw rod (13). The active screw rod (13) rotates through the pulling frame (2) and is fixed thereto. On the output end of the servo motor (12), the interior of the remaining support slide rails (10) on each side is rotatably connected to a driven screw (14) through a bearing, the active screw (13) and each driven screw (14) are threadedly sleeved with a movable sleeve (15), and one end of the movable sleeve (15) extending to the outside of the support slide rail (10) is fixed to the inner wall of the support column (9), and a pulley (16) is fixed on the active screw (13) and the driven screw (14) on both sides of each connecting shell (11), and the two pulleys (16) are connected by a transmission belt (17), and the two active screws (13) are fixed with another pulley (16) at one end that passes through the lower part of the pulling frame (2), and the two other pulleys (16) are connected by another transmission belt (17).

3. The submarine pipeline magnetic flux leakage internal detection device according to claim 1, characterized in that: A fixed front frame (18) is symmetrically fixed to the forward end of the pulling frame (2), and a push plate (19) is provided on the outside of the fixed front frame (18). A connecting plate (20) is fixed to the outside of each fixed front frame (18) by bolts, and the side of the connecting plate (20) is fixed to the inner wall of the push plate (19).

4. The device for detecting internal magnetic flux leakage of submarine pipelines according to claim 2, characterized in that: The support rail (10) and the active screw (13) below the inner support frame (3) have threads in opposite directions to the driven screw (14) below the outer frame (4), and are used to drive the limiting ball (7) and the limiting support plate (8) to move up and down in opposite directions. The height of each support column (9) and support rail (10) is greater than the height of the magnetic flux leakage detector (1).

5. The submarine pipeline magnetic flux leakage internal detection device according to claim 1, characterized in that: The outer frame (4) is configured as a rectangle that is sleeved on the outside of the inner support frame (3), the top surface of each limiting support plate (8) is configured as an arc that matches the inner wall of the pipe, and each fixing screw (6) is provided with a rotation hole that matches the limiting ball (7).

6. The device for detecting internal magnetic flux leakage of submarine pipelines according to claim 2, characterized in that: Each of the supporting slide rails (10) is provided with a transversely placed "convex"-shaped slide groove that cooperates with the movable sleeve (15), and each of the movable sleeve (15) is provided with a threaded hole that cooperates with the active screw (13) and the driven screw (14).

7. The device for detecting internal magnetic flux leakage of submarine pipelines according to claim 2, characterized in that: Another connecting shell (11) is provided on the outside of the other pulley (16) and the transmission belt (17), and the other connecting shell (11) is fixed to the bottom surface of the pulling frame (2). The two active screws (13) are rotated through the other connecting shell (11) and are fixed to the output end of the servo motor (12). Each connecting shell (11) is provided with a movable groove that cooperates with the transmission belt (17).

8. The device for detecting internal magnetic flux leakage of submarine pipelines according to claim 3, characterized in that: The push plate (19) is configured to be in an arc shape that expands outwards away from the pulling frame (2). The width of the push plate (19) is smaller than the width of the pulling frame (2) and larger than the width of the magnetic flux leakage detector (1). The heights of the fixed front frame (18) and the connecting plate (20) are both smaller than the height of the push plate (19).

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