Probe mechanism for an oil and gas pipeline crack detector

Abstract

This invention discloses a probe mechanism for an oil and gas pipeline crack detector, comprising a crack detector port and a sleeve. The sleeve is fitted onto the outer wall of the crack detector port, and both ends of the sleeve are connected and fixed to the crack detector port via a first connecting mechanism and a second connecting structure, respectively. Two shells are symmetrically arranged on the outer wall of the sleeve. Each shell has an excitation circuit assembly and a probe shell assembly at its far end. An adjustment mechanism is provided inside the shell. In this invention, the extension length of the excitation circuit assembly and the probe shell assembly can be adjusted by the adjustment mechanism within the shell, ensuring that the probe mechanism meets the detection requirements of pipelines with different diameters. Furthermore, the excitation circuit assembly and the probe shell assembly are connected to a mounting plate via a connecting plate and a return spring, ensuring that the excitation circuit assembly and the probe shell assembly remain in close contact with the inner wall of the pipeline due to the elastic force provided by the return spring, thus guaranteeing detection accuracy and sensitivity.

Description

Technical Field

[0001] This invention relates to the field of oil and gas pipeline crack detector technology, and more particularly to a probe mechanism for an oil and gas pipeline crack detector. Background Technology

[0002] In recent years, my country's long-distance oil and gas pipelines have developed rapidly. However, pipeline operation and management also face severe challenges, with frequent pipeline leaks caused by corrosion, wear, and accidental damage. Currently, safety hazards caused by stress corrosion cracking pose new challenges to pipeline owners. In particular, with increasingly higher gas transmission pressures and larger discharge volumes, existing cracks in the pipeline can rapidly expand under certain conditions, leading to pipe bursts and instantly destroying hundreds or even thousands of meters of the pipeline.

[0003] The probe mechanism of the existing oil and gas pipeline crack detector requires changing to a different size probe mechanism when inspecting oil and gas pipelines of different diameters. This increases the inspection time, reduces work efficiency, and greatly reduces the practicality of the probe mechanism, failing to meet the needs of users for rapid inspection of oil and gas pipelines of different diameters. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a probe mechanism for an oil and gas pipeline crack detector.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A probe mechanism for an oil and gas pipeline crack detector includes a crack detector port and a sleeve. The sleeve is fitted onto the outer wall of the crack detector port, and both ends of the sleeve are connected and fixed to the crack detector port through a first connecting mechanism and a second connecting structure, respectively. The outer wall of the sleeve is symmetrically provided with two housings. Each of the two housings, located away from each other, is provided with an excitation circuit assembly and a probe housing assembly for detecting the pipeline. The housing is provided with an adjustment mechanism for adjusting the extension length of the excitation circuit assembly and the probe housing assembly.

[0007] Preferably, the adjustment mechanism includes a cavity opened in the housing, an L-shaped rotating plate rotatably mounted in the cavity, and a mounting plate fixedly connected to the outer wall of the rotating plate away from the cavity. A connecting plate is hinged to the bottom of the mounting plate, and a fixed plate is rotatably connected to the end of the mounting plate away from the mounting plate. The excitation circuit assembly and the probe housing assembly are both disposed on the outer wall of the fixed plate away from the connecting plate.

[0008] Preferably, a reset spring for driving the connecting plate to reset is also connected between the mounting plate and the fixing plate, and a support wheel is installed on the side of the fixing plate away from the reset spring and between the excitation circuit assembly and the probe housing assembly.

[0009] Preferably, a sliding plate is integrally formed on the rotating plate, and a first sliding groove is provided on the outer wall of the housing for the sliding plate to slide back and forth.

[0010] Preferably, an arc-shaped plate is fixedly installed on the outer wall of the housing near the first sliding groove, and a second sliding groove is opened inside the arc-shaped plate. A threaded rod that slides back and forth in the second sliding groove is fixedly connected to the top of the sliding plate, and one end of the threaded rod passes through the second sliding groove and is threadedly connected to a nut.

[0011] Preferably, when the threaded rod slides in the second groove, causing the sliding plate to slide in the first groove, the rotating plate can rotate within the cavity.

[0012] Preferably, the first connecting mechanism includes two fixing blocks, both of which are fixedly connected to one end of the sleeve, and each of the two fixing blocks has a clamp that fits against the outer wall of the crack detector port on the side that is close to each other.

[0013] Preferably, bearings are installed on the sides of the two clamping plates that are far apart from each other, and first fastening bolts are threaded onto the two fixing blocks, with the end of the bolt closest to the clamping plate being fixedly connected to the inner wall of the bearing.

[0014] Preferably, the second connecting mechanism includes a mounting base, which is fixedly mounted on the outer wall of the other end of the sleeve, and a retaining plate is hinged inside the mounting base.

[0015] Preferably, the outer wall of the sleeve near the mounting base is provided with a first circular plate, the outer wall of the crack detector port is provided with a second circular plate of the same size as the first circular plate, and the outer wall of the second circular plate is provided with a circular hole, and the end of the clamping plate away from the hinge is provided with a second fastening bolt, and one end of the second fastening bolt extends through the clamping plate into the circular hole.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The extension length of the excitation circuit assembly and the probe housing assembly can be adjusted by the adjustment mechanism set in the housing, which can ensure that the entire probe mechanism of the pipeline crack detector meets the detection requirements of oil and gas pipelines with different diameters. Furthermore, the excitation circuit assembly and the probe housing assembly are connected to the mounting plate through a rotatable connecting plate and a return spring, so that the excitation circuit assembly and the probe housing assembly can always be in close contact with the inner wall of the pipeline by the elastic force provided by the return spring, ensuring detection accuracy and sensitivity.

[0018] 2. By using the first and second connecting mechanisms, the probe mechanism can be quickly installed on the crack detector port, thereby improving work efficiency and accelerating the detection of pipe cracks. Attached Figure Description

[0019] Figure 1 This is a front structural schematic diagram of the probe mechanism of an oil and gas pipeline crack detector proposed in this invention.

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the crack detector port in the middle section;

[0021] Figure 3 for Figure 2 Structural sectional view;

[0022] Figure 4 This is a schematic diagram of the shell structure in this invention;

[0023] Figure 5 This is a schematic diagram of the adjustment mechanism in this invention;

[0024] Figure 6 This is a schematic diagram of the structure of the second connecting mechanism in this invention.

[0025] In the diagram: 1. Crack detector port; 2. Sleeve; 3. Housing; 4. First circular plate; 5. Fixing block; 6. Second circular plate; 7. Excitation circuit assembly; 8. Probe housing assembly; 9. Support wheel; 10. Clamping plate; 11. First fastening bolt; 12. Cavity; 13. Mounting base; 14. Clamping plate; 15. Fixing plate; 16. Return spring; 17. Rotating plate; 18. Connecting plate; 19. Bearing; 20. Mounting plate; 21. First slide groove; 22. Arc plate; 23. Second slide groove; 24. Sliding plate; 25. Threaded rod; 26. Nut; 27. Second fastening bolt; 28. Circular hole. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Reference Figure 1-6 A probe mechanism for an oil and gas pipeline crack detector includes a crack detector port 1 and a sleeve 2. The sleeve 2 is fitted onto the outer wall of the crack detector port 1, and both ends of the sleeve 2 are connected and fixed to the crack detector port 1 through a first connecting mechanism and a second connecting structure, respectively. Two housings 3 are symmetrically provided on the outer wall of the sleeve 2. Each of the two housings 3 has an excitation circuit assembly 7 and a probe housing assembly 8 for detecting the pipeline at one end away from each other. An adjustment mechanism is provided inside the housing 3 for adjusting the extension length of the excitation circuit assembly 7 and the probe housing assembly 8.

[0030] The adjustment mechanism includes a cavity 12 formed within the housing 3. An L-shaped rotating plate 17 is rotatably mounted within the cavity 12. A mounting plate 20 is fixedly connected to the outer wall of the rotating plate 17 on the side away from the cavity 12. A connecting plate 18 is hinged to the bottom of the mounting plate 20, and a fixed plate 15 is rotatably connected to the end of the mounting plate 20 away from the mounting plate 20. The excitation circuit assembly 7 and the probe housing assembly 8 are both located on the outer wall of the fixed plate 15 on the side away from the connecting plate 18. A reset spring 16 for resetting the rotating plate 17 is also connected between the mounting plate 20 and the fixed plate 15. The fixed plate 15 is located on the side away from the reset spring 16 and between the excitation circuit assembly 7 and the probe housing. Support wheels 9 are installed between components 8. A sliding plate 24 is integrally formed on the rotating plate 17. A first groove 21 is opened on the outer wall of the housing 3 for the sliding plate 24 to slide back and forth. An arc plate 22 is fixedly installed on the outer wall of the housing 3 near the first groove 21, and a second groove 23 is opened inside the arc plate 22. A threaded rod 25 that slides back and forth in the second groove 23 is fixedly connected to the top of the sliding plate 24. One end of the threaded rod 25 passes through the second groove 23 and is threadedly connected to a nut 26. When the threaded rod 25 slides in the second groove 23, it drives the sliding plate 24 to slide in the first groove 21, and the rotating plate 17 can rotate in the cavity 12. Based on the diameter of the pipe to be inspected, the threaded rod 25 is rotated within the second slide groove 23, thereby causing the sliding plate 24 to slide within the first slide groove 21. This allows the rotating plate 17 to perform clockwise and counterclockwise circular motions with the hinged part as the center, causing the excitation circuit assembly 7 and the probe housing assembly 8 to rotate and retract into the cavity 12. This adjusts the extension length of the excitation circuit assembly 7 and the probe housing assembly 8, facilitating the inspection of pipes with different diameters. After adjustment, the nut 26 is installed on the threaded rod 25, restricting the threaded rod 25's movement. The movement within the second slide groove 23 limits the position of the excitation circuit assembly 7 and the probe housing assembly 8 at this time; and a support wheel 9 is provided between the excitation circuit assembly 7 and the probe housing assembly 8, so that the probe mechanism moves more smoothly in the pipe. At the same time, a rotatable connecting plate 18 and a reset spring 16 for driving the connecting plate 18 to reset are provided between the mounting plate 20 and the fixing plate 15, so that the excitation circuit assembly 7 and the probe housing assembly 8 can always be in close contact with the inner wall of the pipe by the elastic force provided by the reset spring 16, ensuring detection accuracy and sensitivity.

[0031] The first connecting mechanism includes two fixing blocks 5, each fixedly connected to one end of the sleeve 2. On the side of each fixing block 5 that is close to each other, a clamping plate 10 is provided that fits against the outer wall of the crack detector port 1. On the side of each clamping plate 10 that is far from each other, a bearing 19 is installed. A first fastening bolt 11 is threaded onto each fixing block 5, with its end near the clamping plate 10 fixedly connected to the inner wall of the bearing 19. After the sleeve 2 is fitted onto the outer wall of the crack detector port 1, rotating the first fastening bolt 11 moves the clamping plate 10 towards the crack detector port 1, causing the clamping plate 10 to tightly abut against the outer wall of the crack detector port 1, thus connecting one end of the sleeve 2 to the crack detector port 1.

[0032] The second connecting mechanism includes a mounting base 13, which is fixedly mounted on the outer wall of the other end of the sleeve 2. A retaining plate 14 is hinged inside the mounting base 13. A first circular plate 4 is provided on the outer wall of the end of the sleeve 2 closest to the mounting base 13. A second circular plate 6 of the same size as the first circular plate 4 is provided on the outer wall of the crack detector port 1. A circular hole 28 is opened on the outer wall of the second circular plate 6. A second fastening bolt 27 is provided on the end of the retaining plate 14 away from the hinge. One end of the second fastening bolt 27 passes through the retaining plate 14 and extends into the circular hole 28. After the first connecting mechanism is installed, the first circular plate 4 and the second circular plate 6 are in contact. The retaining plate 14 is rotated to make it horizontal, and the second fastening bolt 27 is rotated so that one end of the second fastening bolt 27 abuts against the inner wall of the circular hole 28, thus fixing the other end of the sleeve 2. The sleeve 2 can then be installed on the crack detector port 1.

[0033] In this invention, when using the device, the user first places the sleeve 2 onto the outer wall of the crack detector port 1, so that the first circular plate 4 and the second circular plate 6 are in contact. The first fastening bolt 11 is rotated to move the clamping plate 10 toward the crack detector port 1, so that the clamping plate 10 is tightly against the outer wall of the crack detector port 1, connecting one end of the sleeve 2 to the crack detector port 1. Then, the clamping plate 14 is rotated to a horizontal position, and the second fastening bolt 27 is rotated so that one end of the second fastening bolt 27 abuts against the inner wall of the circular hole 28, fixing the other end of the sleeve 2. Thus, the sleeve 2 is installed on the crack detector port 1. According to the diameter of the pipe to be detected, the threaded rod 25 is rotated in the second sliding groove 23, thereby causing the sliding plate 24 to slide in the first sliding groove 21. This allows the rotating plate 17 to make clockwise and counterclockwise circular movements with the hinged part as the circle, driving the excitation circuit assembly. The excitation circuit assembly 7 and the probe housing assembly 8 rotate and retract into the cavity 12, thereby adjusting the extension length of the excitation circuit assembly 7 and the probe housing assembly 8. This facilitates the excitation circuit assembly 7 and the probe housing assembly 8 in detecting pipes of different diameters. After adjustment, the nut 26 is installed on the threaded rod 25, restricting the movement of the threaded rod 25 within the second slide groove 23, thus defining the position of the excitation circuit assembly 7 and the probe housing assembly 8 at this time. Furthermore, a support wheel 9 is provided between the excitation circuit assembly 7 and the probe housing assembly 8, making the overall movement of the probe mechanism within the pipe smoother. At the same time, a rotatable connecting plate 18 and a reset spring 16 for resetting the connecting plate 18 are provided between the mounting plate 20 and the fixing plate 15. This ensures that the excitation circuit assembly 7 and the probe housing assembly 8 remain in close contact with the inner wall of the pipe due to the elastic force provided by the reset spring 16, guaranteeing detection accuracy and sensitivity.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A probe mechanism for an oil and gas pipeline crack detector, comprising a crack detector port (1) and a sleeve (2), characterized in that, The sleeve (2) is fitted onto the outer wall of the crack detector port (1), and the two ends of the sleeve (2) are connected and fixed to the crack detector port (1) through the first connecting mechanism and the second connecting mechanism respectively. The outer wall of the sleeve (2) is symmetrically provided with two housings (3). The ends of the two housings (3) that are far apart from each other are provided with an excitation circuit assembly (7) and a probe housing assembly (8) for detecting the pipeline. The housing (3) is provided with an adjustment mechanism for adjusting the extension length of the excitation circuit assembly (7) and the probe housing assembly (8). The first connecting mechanism includes two fixing blocks (5), both fixing blocks (5) are fixedly connected to one end of the sleeve (2), and the two fixing blocks (5) are provided with a clamping plate (10) that fits against the outer wall of the crack detector port (1) on the side close to each other. The two clamping plates (10) are installed with a bearing (19) on the side far away from each other. The two fixing blocks (5) are threaded with a first fastening bolt (11), and the end of the first fastening bolt (11) close to the clamping plate (10) is fixedly connected to the inner wall of the bearing (19). The second connecting mechanism includes a mounting base (13), which is fixedly mounted on the outer wall of the other end of the sleeve (2), and a clamping plate (14) is hinged inside the mounting base (13). The outer wall of the sleeve (2) near the mounting base (13) is provided with a first circular plate (4), and the outer wall of the crack detector port (1) is provided with a second circular plate (6) of the same size as the first circular plate (4), and the outer wall of the second circular plate (6) is provided with a circular hole (28). The end of the clamping plate (14) away from the hinge is provided with a second fastening bolt (27), and one end of the second fastening bolt (27) extends through the clamping plate (14) into the circular hole (28).

2. The probe mechanism of an oil and gas pipeline crack detector according to claim 1, characterized in that, The adjustment mechanism includes a cavity (12) opened in the housing (3). An L-shaped rotating plate (17) is rotatably installed in the cavity (12). A mounting plate (20) is fixedly connected to the outer wall of the rotating plate (17) away from the cavity (12). A connecting plate (18) is hinged to the bottom of the mounting plate (20). A fixing plate (15) is rotatably connected to the end of the mounting plate (20) away from the mounting plate (20). The excitation circuit assembly (7) and the probe housing assembly (8) are both located on the outer wall of the fixing plate (15) away from the connecting plate (18).

3. The probe mechanism of an oil and gas pipeline crack detector according to claim 2, characterized in that, A reset spring (16) for driving the connecting plate (18) to reset is also connected between the mounting plate (20) and the fixing plate (15). A support wheel (9) is installed on the side of the fixing plate (15) away from the reset spring (16) and between the excitation circuit assembly (7) and the probe housing assembly (8).

4. The probe mechanism of an oil and gas pipeline crack detector according to claim 2, characterized in that, A sliding plate (24) is integrally formed on the rotating plate (17), and a first groove (21) is provided on the outer wall of the housing (3) for the sliding plate (24) to slide back and forth.

5. The probe mechanism of an oil and gas pipeline crack detector according to claim 4, characterized in that, An arc-shaped plate (22) is fixedly installed on the outer wall of the housing (3) near the first slide groove (21), and a second slide groove (23) is opened inside the arc-shaped plate (22). A threaded rod (25) that slides back and forth in the second slide groove (23) is fixedly connected to the top of the sliding plate (24). One end of the threaded rod (25) passes through the second slide groove (23) and is threadedly connected to a nut (26).

6. The probe mechanism of an oil and gas pipeline crack detector according to claim 5, characterized in that, When the threaded rod (25) slides in the second groove (23) and drives the sliding plate (24) to slide in the first groove (21), the rotating plate (17) can rotate in the cavity (12).

7. The probe mechanism of an oil and gas pipeline crack detector according to claim 1, characterized in that, Bearings (19) are installed on the opposite sides of the two clamping plates (10), and first fastening bolts (11) are threaded onto the two fixing blocks (5), with the end of the bolt near the clamping plate (10) being fixedly connected to the inner wall of the bearing (19).

8. The probe mechanism of an oil and gas pipeline crack detector according to claim 1, characterized in that, The sleeve (2) has a first circular plate (4) on its outer wall near the mounting base (13). The crack detector port (1) has a second circular plate (6) of the same size as the first circular plate (4) on its outer wall. The outer wall of the second circular plate (6) has a circular hole (28). The clamping plate (14) has a second fastening bolt (27) on its outer end away from the hinge. One end of the second fastening bolt (27) passes through the clamping plate (14) and extends into the circular hole (28).

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