A magnetostrictive guided wave detection apparatus for long distance pipelines

Abstract

The utility model discloses a kind of magnetostrictive waveguide detection devices for long-distance pipeline, belong to the technical field of pipeline detection, including storage mechanism, tape detection probe and mounting structure;Storage mechanism is suitable for winding and releasing predetermined length tape detection probe, tape detection probe can be around in the pipeline to be detected;The movable end of tape detection probe has predetermined length overlap portion with the tape detection probe portion located in the lateral of pipeline after winding around pipeline one round;Mounting structure is configured in overlap portion, for positioning predetermined length tape detection probe released by storage mechanism in corresponding detection operation position, tape detection probe is stored, different length of belt can be released to adapt to different pipeline to be detected, and corresponding mounting structure is overlapped in the end of the operation section of belt material using pressing roller Form multiple site line fixed, ensure stable installation and facilitate disassembly, improve the maintenance, detection efficiency of multiple pipeline.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipeline inspection, and in particular relates to a magnetostrictive guided wave detection device for long-distance pipelines. Background Technology

[0002] Magnetostriction refers to the phenomenon where the physical length and volume of ferromagnetic materials undergo minute changes due to variations in an applied magnetic field. Under the influence of an applied magnetic field, the magnetic domains of the microscopic particles move in a specific direction, generating elastic mechanical waves that couple onto the pipeline and propagate along it. Magnetostrictive guided wave pipeline corrosion long-distance online monitoring technology can monitor the changes in pipeline corrosion and crack defects over time, providing timely early warnings of pipeline damage.

[0003] The pipelines being inspected include surface / overhead / buried pipelines, nuclear power plant (high-temperature) pipelines, gas pipelines, and offshore platform process pipelines. These pipelines have different outer diameters, and magnetostrictive guided wave detectors are generally clamp-type or belt-type. Different sizes of clamps or belt clips need to be selected according to the different sizes of the pipelines to be inspected to fix the belt detectors of different lengths at the corresponding positions on the pipelines to be inspected. Especially during periodic maintenance and inspection, it is necessary to frequently change detectors of different outer diameters or lengths according to the different outer diameters of the pipelines, which affects the efficiency of the inspection. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a magnetostrictive guided wave detection device for long-distance pipelines.

[0005] The technical solution adopted in this utility model is as follows: A magnetostrictive guided wave detection device for long-distance pipelines includes a storage mechanism, a belt-type detection probe, and an installation structure; the storage mechanism is adapted to wind up and release a belt-type detection probe of a predetermined length, the belt-type detection probe can be wound around the pipeline to be inspected, used to excite guided waves propagating along the pipeline direction and to receive reflected signals generated by pipeline defects; the movable end of the belt-type detection probe has a predetermined length of overlap with the belt-type detection probe portion located on the side of the pipeline after winding around the pipeline once; the installation structure is configured in the overlapping portion, used to position the belt-type detection probe of the predetermined length released by the storage mechanism at the corresponding detection operation position;

[0006] The mounting structure includes a clip, an elastic pressing element located in the channel, a pressing roller, and a drive unit;

[0007] The card has a channel through which the overlapping portion of a tape-type detection probe passes; the channel is open on one side in the working direction;

[0008] The elastic pressing member has a predetermined toughness, one end is fixed to the side wall of the channel, and the other end extends along the width direction of the channel to a predetermined length. The elastic pressing member has an inclined portion of a predetermined length at the extended end, and the inclined portion has a predetermined inclination angle.

[0009] The pressing rollers are arranged sequentially on the working surface of the elastic pressing member along the width direction of the channel;

[0010] The drive unit is mounted on the card and is suitable for driving the undulation of the elastic pressing element.

[0011] Furthermore, the storage mechanism includes a base, a storage roller, and two positioning rings;

[0012] The base has an open-topped receiving chamber;

[0013] A take-up roller, rotatably disposed within the receiving chamber, has a predetermined outer diameter dimension and is suitable for winding and releasing the belt-type detection probe;

[0014] Two positioning rings are slidably disposed on the outer periphery of the take-up roller, which is suitable for limiting the width of the take-up operation; the positioning rings are respectively connected to a sliding drive, which is suitable for sliding along the axial direction of the take-up roller;

[0015] The receiving chamber has a U-shaped opening at the front end of the receiving roller in the winding operation direction, which is suitable for the belt detection probe to enter and exit.

[0016] Furthermore, the strip detection probe includes an iron-cobalt alloy strip, an excitation coil wound on the iron-cobalt alloy strip, and permanent magnets arranged in an array on the outside of the iron-cobalt alloy strip, with the excitation coils spaced apart between the arrayed permanent magnets.

[0017] Furthermore, the iron-cobalt alloy strip is bonded to and fixed with an excitation coil using epoxy resin, and a flexible substrate for mounting a permanent magnet is bonded to the outside of the iron-cobalt alloy strip using epoxy resin. The flexible substrate has predetermined toughness and deformation force, and can bend and deform synchronously with the iron-cobalt alloy strip. The mounting surface of the flexible substrate is provided with a mounting groove that matches the permanent magnet. A flexible encapsulation layer is disposed on the outside of the permanent magnet. The flexible encapsulation layer has predetermined toughness and deformation force, and can bend and deform synchronously with the iron-cobalt alloy strip.

[0018] Furthermore, multiple sets of the driving unit are spaced apart along the length of the channel. The driving unit includes a threaded rod and a pressure plate. The threaded rod is threadedly connected to the side wall of the channel opposite to the elastic pressing member and passes through the corresponding side wall into the channel connected to the pressure plate. The pressure plate can abut against or move away from the elastic pressing member in the channel through the threaded rod, so that the elastic pressing member undulates in the channel.

[0019] Furthermore, the sliding contact surface between the channel and the belt detection probe is provided with a limiting groove that matches the overlapping portion of the belt detection probe.

[0020] Furthermore, the pressing roller includes an inner rubber roller and an elastic extrusion layer disposed on the outer side of the rubber roller. The elastic extrusion layer is formed by an outer rubber layer with corresponding elastic deformation force and an elastic filler filling between the outer rubber layer and the outer side of the rubber roller.

[0021] Furthermore, an elastic band is connected between the two opposing inner walls of the U-shaped opening. The elastic band has a predetermined elasticity and a predetermined working height with the bottom wall of the U-shaped opening. A baffle is arranged near the receiving roller of the U-shaped opening, and a predetermined working distance is maintained between the baffle and the elastic band.

[0022] Furthermore, the sliding drive includes a U-shaped rod that passes through the corresponding side wall of the receiving chamber. The two ends of the U-shaped rod are located inside the receiving chamber and fixed to the corresponding side wall of the positioning ring. A compression spring is wound around the portion of the U-shaped rod inside the receiving chamber. The compression spring is located between the positioning ring and the corresponding side wall of the receiving chamber.

[0023] The beneficial effects of this utility model after adopting the above structure are as follows:

[0024] The storage mechanism and corresponding installation structure are designed to store the belt-type detection probe. Different lengths of belt material can be released to adapt to different pipelines to be inspected. The corresponding installation structure uses pressing rollers to form multi-point lines to fix the overlapping part of the working section of the belt material at the end, ensuring stable installation and easy disassembly, thereby improving the maintenance and inspection efficiency of multiple pipelines. Attached Figure Description

[0025] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0026] Figure 1 This is a schematic diagram of the multi-layer structure of a belt detection probe for a magnetostrictive guided wave detection device for long-distance pipelines proposed in this utility model.

[0027] Figure 2 This is a schematic diagram of the storage mechanism structure of a magnetostrictive guided wave detection device for long-distance pipelines proposed in this utility model.

[0028] Figure 3 This is a schematic diagram of the positioning ring structure of a magnetostrictive guided wave detection device for long-distance pipelines proposed in this utility model.

[0029] Figure 4This is a schematic diagram of the installation structure of a magnetostrictive guided wave detection device for long-distance pipelines proposed in this utility model.

[0030] Figure 5 This is a partial cross-sectional view of the installation structure of a magnetostrictive guided wave detection device for long-distance pipelines proposed in this utility model.

[0031] In the attached diagram: 1. Belt-type detection probe, 2. Iron-cobalt alloy strip, 3. Excitation coil, 4. Permanent magnet, 5. Flexible substrate, 6. Clip, 7. Channel, 8. Elastic pressing component, 9. Inclined part, 10. Pressing roller, 11. Base, 12. Receiving roller, 13. Positioning ring, 14. U-shaped opening, 15. Threaded rod, 16. Pressure plate, 17. Limiting groove, 18. Rubber roller, 19. Elastic extrusion layer, 20. Limiting strip, 21. Elastic band, 22. Stop bar, 23. U-shaped rod, 24. Compression spring. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] like Figures 1-5As shown, a magnetostrictive guided wave testing device for long-distance pipelines includes a storage mechanism, a belt-type testing probe 1 retractable into the storage mechanism, and an installation structure. The storage mechanism is adapted to retract and release the belt-type testing probe 1, and can release belt-type testing probes 1 of different lengths according to different outer diameters of the pipeline to be tested. The belt-type testing probe 1 is wound around the pipeline to be tested, used to excite guided waves propagating along the pipeline direction and to receive reflected signals generated by pipeline defects. The belt-type testing probe 1 is connected to an ultrasonic guided wave detector via an adapter. The ultrasonic guided wave detector collects the guided wave data fed back by the belt-type testing probe 1 and performs corresponding data analysis. The movable end of the belt-type testing probe 1 overlaps with a portion of the belt-type testing probe 1 located on the side of the pipeline by a predetermined length after wrapping around the pipeline once. The installation structure is configured in the aforementioned overlapping portion to position the belt-type testing probe 1 of the corresponding length released by the storage mechanism at the corresponding testing operation position.

[0035] Specifically, the belt-type detection probe 1 includes an iron-cobalt alloy strip 2, an excitation coil 3 wound on the iron-cobalt alloy strip 2, and permanent magnets 4 arranged in an array on the outside of the iron-cobalt alloy strip 2. The excitation coils 3 are spaced apart between the arrayed permanent magnets. The permanent magnets 4 are rectangular or square in shape of a predetermined size and are arranged in a circumferential and axial array wound around the iron-cobalt alloy strip 2. The excitation coils are distributed among the small permanent magnets arranged circumferentially.

[0036] In this embodiment, the iron-cobalt alloy strip 2 is bonded to and fixed with the excitation coil 3 using epoxy resin. A flexible substrate 5 for mounting the permanent magnet 4 is bonded to the outside of the iron-cobalt alloy strip 2 using epoxy resin. The flexible substrate 5 possesses predetermined toughness and deformation force, allowing it to bend and deform synchronously with the iron-cobalt alloy strip 2. An mounting groove matching the permanent magnet 4 is formed on the mounting surface of the flexible substrate 5. A flexible encapsulation layer is disposed on the outside of the permanent magnet 4. This flexible encapsulation layer possesses predetermined toughness and deformation force, allowing it to bend and deform synchronously with the iron-cobalt alloy strip 2. The flexible encapsulation layer can be a silicone or polyurethane layer. In this embodiment, the strip-type detection probe 1 is a flat, flexible probe that can be bent and installed to conform to the curvature of the pipe.

[0037] In this embodiment, the mounting structure includes a clip 6, an elastic pressing member 8 located in the channel 7, a pressing roller 10, and a driving unit;

[0038] The clamp 6 has a channel 7 through which the overlapping part of the belt-type detection probe 1 passes. The channel 7 is open on one side of the working direction. Specifically, the clamp 6 can be U-shaped. The belt-type detection probe 1 enters the channel 7 of the clamp 6 from the side opening, and the clamp 6 can move along the length direction of the belt-type detection probe 1 to the overlapping part, so that the overlapping part enters the interior of the channel 7. Preferably, the sliding contact surface between the channel 7 and the belt-type detection probe 1 is provided with a limiting groove 17 that is adapted to the overlapping part of the belt-type detection probe 1, so that the overlapping part is located in the limiting groove 17, which facilitates better locking and positioning.

[0039] The elastic pressing member 8 has a predetermined toughness, one end is fixed to the side wall of the channel 7, and the other end extends along the width direction of the channel 7 to a predetermined length. The elastic pressing member 8 has an inclined portion 9 of a predetermined length at the extended end. The inclined portion 9 has a predetermined inclination angle. Preferably, a limiting strip 20 is provided at the extended end of the inclined portion 9. The limiting strip 20 can be located on the side of the limiting groove 17 and can work together with the pressing roller 10 on the overlapping part of the belt detection probe 1.

[0040] The pressing rollers 10 are arranged sequentially on the working surface of the elastic pressing member 8 along the width direction of the channel 7. The pressing rollers 10 can be set with a corresponding outer diameter so that when the elastic pressing member 8 is pressed, the pressing rollers 10 can act on the overlapping part of the belt detection probe 1. The pressing rollers 10 can include an inner rubber roller 18 and an elastic extrusion layer 19 disposed on the outside of the rubber roller 18. The elastic extrusion layer 19 is formed by an outer rubber layer with corresponding elastic deformation force and an elastic filler filling between the outer rubber layer and the outside of the rubber roller 18.

[0041] The drive unit is mounted on the clamp 6 and is suitable for driving the undulation of the elastic pressing member 8. Multiple sets of drive units are spaced apart along the length of the channel 7. Each drive unit includes a threaded rod 15 and a pressure plate 16. The threaded rod 15 is threadedly connected to the side wall of the channel 7 opposite to the elastic pressing member 8 and penetrates the corresponding side wall into the channel 7 to connect with the pressure plate 16. The pressure plate 16 can abut against or move away from the elastic pressing member 8 in the channel 7 via the threaded rod 15, causing the elastic pressing member 8 to undulate within the channel 7. It should be noted that the corresponding side wall of the channel 7 where the threaded rod 15 is mounted has… The appropriate thickness is provided and threadedly configured with the threaded rod 15. The pressure plate 16 can be movably or fixedly configured with the threaded rod 15 via a bushing. The pressure plate 16 can extend along the inclined direction of the elastic pressing member 8. When the threaded rod 15 rotates and moves inward toward the channel 7, it can carry the pressure plate 16 to rotate and press against the elastic pressing member 8, so that the pressing roller 10 and the limiting strip 20 are pressed down to the overlapping part of the belt detection probe 1. Here, the rubber outer layer of the extrusion roller and the elastic filler provide flexible extrusion to the belt detection probe 1, avoiding rigid extrusion that could damage its internal structure.

[0042] In some preferred embodiments, the storage mechanism includes a base 11, a take-up roller 12, and a positioning ring 13; the base 11 has an open-top receiving chamber; the receiving chamber has a U-shaped opening 14 at the front end of the take-up roller 12 in the winding operation direction, suitable for the belt detection probe 1 to enter and exit. Preferably, an elastic band 21 is connected between the two opposing inner walls of the U-shaped opening 14. The elastic band 21 has a predetermined elasticity and a predetermined working height with the bottom wall of the U-shaped opening 14. A baffle 22 is arranged on the side of the U-shaped opening 14 near the take-up roller 12, and a predetermined working distance is provided between the baffle 22 and the elastic band 21. When the belt detection probe 1 is released out of the receiving chamber, it passes above the baffle 22 and below the elastic band, and exits the receiving chamber through the U-shaped opening 14.

[0043] The receiving roller 12 is rotatably disposed in the receiving cavity and has a predetermined outer diameter size, suitable for winding and releasing the belt detection probe 1. Rubber spacers are arranged circumferentially on the outer wall of the rotating roller, and the rubber spacers extend axially from the rotating roller.

[0044] Two positioning rings 13 are slidably disposed on the outer periphery of the take-up roller 12, which is suitable for limiting the width of the winding operation. The positioning rings 13 are respectively connected to a sliding drive, which is suitable for sliding along the axial direction of the take-up roller 12. The sliding drive includes a U-shaped rod 23 that passes through the corresponding side wall of the receiving chamber. The two ends of the U-shaped rod 23 are located in the receiving chamber and fixed to the corresponding side wall of the positioning ring 13. A compression spring 24 is wound around the part of the U-shaped rod 23 located in the receiving chamber. The compression spring 24 is located between the positioning ring 13 and the corresponding side wall of the receiving chamber. The belt detection probe 1 wound on the take-up roller 12 can open the positioning ring 13 to both sides. The positioning ring 13 moves towards the side wall of the receiving chamber to compress the corresponding compression spring 24. The positioning ring 13 can adaptably clamp the belt detection probe 1 on both sides of different widths, improving the practicality of the device.

[0045] When it is necessary to release the belt detection probe 1, the movable end of the belt detection probe 1 can be pulled to extend from the opening at the front end of the receiving chamber. Depending on the outer diameter of the belt detection pipe, belt detection probe 1 of different lengths can be released, so that the belt detection probe 1 can wrap around the pipe to be detected and form a certain length of overlap with the belt detection probe 1 on the side of the pipe. This overlap can be located in the channel 7 of the clamp, and the drive unit presses the elastic pressing member 8, so that the multiple pressing rollers 10 arranged on the working surface of the elastic pressing member 8 press on the overlap, positioning the wrapped belt detection probe 1 part on the pipe to be detected.

[0046] After the test is completed, the pressure plate 16 can be lifted by the threaded rod 15, the elastic pressing element 8 can be reset, the pressing roller 10 can be disengaged from the belt detection probe 1, and the storage roller 12 can be rotated to rewind and retract the belt detection probe 1.

[0047] Working principle: During periodic pipeline inspection and maintenance, a retractable belt sensor can be used to adaptively release belt detection probes 1 of different lengths to accommodate pipelines with different outer diameters. After the belt detection probe 1 is wound around the corresponding pipeline to be inspected, it forms an overlap of the corresponding length with the belt detection probe 1 on the side of the pipeline. The overlap enters the channel 7 from the side of the clamp 6 and can enter the limiting slide groove 17. At this time, the clamp 6 moves along the length direction of the belt detection probe 1 to the side of the pipeline and pulls the movable end of the belt detection probe 1, tightening the belt detection probe 1 wound around the outer wall of the pipeline. The elastic pressing member 8 is pressed down by the drive unit, so that the pressing roller 10 presses against the corresponding overlap.

[0048] The device of this application has a simple fixing method and is easy to operate. It does not require replacement of the belt detection probe 1, which improves the detection efficiency. Excess belt material is wound up inside the base 11 for protection, reducing the probability of breakage and irregular bending of the belt material (which can generate stress, damage the internal structure, and affect the detection results).

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents. In summary, if those skilled in the art, inspired by this description, design similar structural methods and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention. Each component of this application can be driven by a corresponding external motor; this is prior art and will not be elaborated upon here.

Claims

1. A magnetostrictive guided wave detection apparatus for long distance pipelines, characterized by, include: Storage mechanism, suitable for winding and releasing a belt-type detection probe of a predetermined length; A belt-type inspection probe can be wound around the pipe to be inspected to excite guided waves propagating along the pipe direction and to receive reflected signals generated by defects in the pipe; the movable end of the belt-type inspection probe has a predetermined length of overlap with the portion of the belt-type inspection probe located on the side of the pipe after it has been wound around the pipe once. An installation structure, configured in the overlapping portion, is used to position a belt-type detection probe of a predetermined length released by the storage mechanism at the corresponding detection operation position. The mounting structure includes: The card has a channel through which the overlapping portion of a belt-type detection probe passes, the channel being open on one side in the working direction; An elastic pressing member located in the channel has a predetermined toughness. One end is fixed to the side wall of the channel, and the other end extends along the width direction of the channel to a predetermined length. The elastic pressing member has an inclined portion of a predetermined length at the extended end, and the inclined portion has a predetermined inclination angle. The pressing rollers are arranged sequentially on the working surface of the elastic pressing member along the width direction of the channel; The drive unit, mounted on the card, is suitable for driving the undulation of the elastic pressing element.

2. A magnetostrictive guided wave detection apparatus for long range pipelines according to claim 1, wherein, The storage mechanism includes: The base has an open-topped receiving chamber; A take-up roller, rotatably disposed within the receiving chamber, has a predetermined outer diameter dimension and is suitable for winding and releasing the belt-type detection probe; Two positioning rings are slidably disposed on the outer periphery of the take-up roller, which is suitable for limiting the width of the take-up operation; the positioning rings are respectively connected to a sliding drive, which is suitable for sliding along the axial direction of the take-up roller; The receiving chamber has a U-shaped opening at the front end of the receiving roller in the winding operation direction, which is suitable for the belt detection probe to enter and exit.

3. A magnetostrictive guided wave detection apparatus for long range pipelines as defined in claim 1, wherein: The strip detection probe includes an iron-cobalt alloy strip, an excitation coil wound on the iron-cobalt alloy strip, and permanent magnets arranged in an array on the outside of the iron-cobalt alloy strip, with the excitation coils spaced apart between the arrayed permanent magnets.

4. A magnetostrictive guided wave detection apparatus for long range pipelines according to claim 3, characterized in that: The iron-cobalt alloy strip is bonded to and fixed with an excitation coil using epoxy resin. A flexible substrate for mounting a permanent magnet is bonded to the outside of the iron-cobalt alloy strip using epoxy resin. The flexible substrate has predetermined toughness and deformation force, and can bend and deform synchronously with the iron-cobalt alloy strip. The mounting surface of the flexible substrate has a mounting groove that matches the permanent magnet. A flexible encapsulation layer is disposed on the outside of the permanent magnet. The flexible encapsulation layer has predetermined toughness and deformation force, and can bend and deform synchronously with the iron-cobalt alloy strip.

5. A magnetostrictive guided wave detection apparatus for long range pipelines as defined in claim 1 wherein, The drive unit is provided in multiple sets at intervals along the length of the channel. The drive unit includes a threaded rod and a pressure plate. The threaded rod is threadedly connected to the side wall of the channel opposite to the elastic pressing member and passes through the corresponding side wall into the channel to connect with the pressure plate. The pressure plate can abut against or move away from the elastic pressing member in the channel through the threaded rod, so that the elastic pressing member undulates in the channel.

6. A magnetostrictive guided wave detection apparatus for long range pipelines as defined in claim 1 wherein, The sliding contact surface between the channel and the belt detection probe is provided with a limiting groove that matches the overlapping portion of the belt detection probe.

7. A magnetostrictive guided wave detection apparatus for long range pipelines as defined in claim 1 wherein, The pressing roller includes an inner rubber roller and an elastic extrusion layer disposed on the outer side of the rubber roller. The elastic extrusion layer is formed by an outer rubber layer with corresponding elastic deformation force and an elastic filler filling between the outer rubber layer and the outer side of the rubber roller.

8. A magnetostrictive guided wave detection apparatus for long range pipelines according to claim 1, wherein, The inclined portion is provided with a limit strip at its extended end.

9. A magnetostrictive guided wave detection apparatus for long range pipelines as defined in claim 2, wherein: An elastic band is connected between the two opposing inner walls of the U-shaped opening. The elastic band has a predetermined elasticity and a predetermined working height with the bottom wall of the U-shaped opening. A baffle is provided on the side of the U-shaped opening near the receiving roller, and a predetermined working distance is provided between the baffle and the elastic band.

10. A magnetostrictive guided wave detection apparatus for long range pipelines as defined in claim 2, wherein: The sliding drive includes a U-shaped rod that passes through the corresponding side wall of the receiving chamber. The two ends of the U-shaped rod are located inside the receiving chamber and fixed to the corresponding side wall of the positioning ring. A compression spring is wound around the part of the U-shaped rod inside the receiving chamber. The compression spring is located between the positioning ring and the corresponding side wall of the receiving chamber.

Images