A device and method for monitoring the corrosion of internal steel wires of a cable

Abstract

The application relates to the technical field of bridge cable detection, and discloses a cable internal steel wire rust and broken wire guided wave detection monitoring device and method, which comprises the following: a ring keel one, a ring keel two is arranged at the bottom of the ring keel one, two symmetrically-distributed accommodation grooves are arranged between the ring keel one and the ring keel two, an adjusting mechanism is arranged between the ring keel one and the accommodation grooves and is used for adjusting the detection position of a magnetic guided wave detector in the accommodation grooves; a mounting device, a positioning device, a foreign matter scraping device, an adjusting detection position device and a detection monitoring device are arranged; the magnetic guided wave detector is used for detecting the internal steel wire of the cable; the magnetic guided wave detection technology can penetrate into the internal cable, can accurately detect the rust and broken wire conditions of the steel wire, can effectively identify the potential problems in the internal cable compared with the traditional manual appearance inspection which can only detect surface damage, and greatly improves the detection accuracy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge cable detection, in particular to a cable internal steel wire corrosion and broken wire guided wave detection monitoring device and method. BACKGROUND

[0002] As a key structural component, cables are widely used in bridge, tower, large building and many other engineering fields. The main function of the cable is to bear tension and ensure the stability and safety of the structure. Due to long-term exposure to complex and changeable environment, the internal steel wire of the cable is easily eroded by external factors. Corrosion not only weakens the strength and toughness of the steel wire, but also may cause the steel wire to break.

[0003] At present, there are many limitations in the detection method of the internal steel wire of the cable. The traditional detection method mainly relies on manual visual inspection, but this method can only detect the damage on the surface of the cable, and it is difficult to accurately judge the corrosion and broken wire of the internal steel wire. In addition, some non-destructive testing techniques, such as ultrasonic testing and radiographic testing, can detect internal defects to some extent, but for the special structure of the cable, the detection effect is not ideal, and there are problems such as low detection precision, limited detection range, complex operation process and high detection cost. SUMMARY

[0004] The purpose of the present application is to provide a cable internal steel wire corrosion and broken wire guided wave detection monitoring device, which solves the problem that only the damage on the surface of the cable can be detected in the background art, and it is difficult to accurately judge the corrosion and broken wire of the internal steel wire.

[0005] In order to solve the above technical problems, the present application provides the following technical scheme:

[0006] A cable internal steel wire corrosion and broken wire guided wave detection monitoring device, comprising:

[0007] A ring keel one, a ring keel two is installed at the bottom of the ring keel one, two symmetrically distributed installation grooves are arranged between the ring keel one and the ring keel two, an inner ring plastic keel is fixedly installed in each of the two installation grooves, a plurality of uniformly distributed magnetostrictive guided wave detectors are installed in the inner ring plastic keel, the magnetostrictive guided wave detectors are used to emit and receive magnetostrictive guided wave signals to detect the corrosion and broken wire of the internal steel wire of the cable, and all the magnetostrictive guided wave detectors are distributed circumferentially around the cable, covering more than 90% of the circumferential detection area of the cable in the initial state;

[0008] A control mechanism is located between the ring keel one and the ring keel two, used to coordinate and adjust the action time sequence of each component of the mechanism, to ensure that the separation, closing of the ring keel one and the ring keel two and the adjustment process of the magnetostrictive guided wave detector are synchronized and stable.

[0009] An adjustment mechanism, located between the first annular keel and the mounting groove, is used to adjust the detection position of the magnetostrictive wave detector within the mounting groove to accommodate cable shape deviations and signal attenuation at the annular keel interface. The adjustment mechanism includes a drive assembly, a pressing mechanism, and a telescopic assembly. The drive assembly, located at the top of the first annular keel, drives the magnetostrictive wave detector to make circumferential adjustments around the cable, ensuring that all magnetostrictive wave detectors maintain the optimal detection distance from the cable surface and avoiding decreased detection accuracy due to spacing deviations. The pressing mechanism, located between the first and second annular keels, tightly positions the first and second annular keels on the cable, preventing slippage during detection and ensuring stable relative positions between the magnetostrictive wave detector and the cable. The telescopic assembly, located inside the second annular keel, separates and closes the first and second annular keels and allows adjustment of the opening size according to the cable diameter, facilitating the assembly and disassembly of the device with cables of different specifications.

[0010] Preferably, the adjustment mechanism further includes a semi-toothed ring fixedly installed on the outer wall of the inner ring plastic keel. The top of the placement groove is provided with an adjustment groove for the semi-toothed ring to rotate. The top of the adjustment groove is provided with a storage groove. A rack plate is provided inside the storage groove. The rack plate meshes with the semi-toothed ring. The linear movement of the rack plate drives the semi-toothed ring to rotate, thereby driving the inner ring plastic keel and the magnetostrictive wave detector to rotate synchronously, ensuring that the adjustment process is smooth and the angle is accurate, and avoiding the magnetostrictive wave signal attenuation zone at the interface between the first and second ring keels.

[0011] Preferably, the drive assembly includes a stabilizing plate fixed to the top of the rack plate. The top of the receiving slot has an opening slot for the stabilizing plate to move horizontally. A rod is fixedly installed inside the opening slot. The rod is inserted into the stabilizing plate. The rod is used to guide the movement of the stabilizing plate, prevent the stabilizing plate from shifting and causing misalignment between the rack plate and the half-tooth ring, and ensure the transmission accuracy of the drive assembly.

[0012] Preferably, the drive assembly further includes an electric push rod fixedly installed on the top of the annular keel, the stabilizing plate extends to the top of the opening slot and a movable block is fixedly installed thereon, the telescopic end of the electric push rod is fixedly connected to the movable block, and the telescopic stroke of the electric push rod matches the fine-tuning angle of the magnetostrictive waveguide detector; a protective cover is fixedly installed on the top of the annular keel, and a protective cavity is opened inside the protective cover. The protective cavity corresponds to the electric push rod and the movable block and is used to shield the drive assembly from rain and dust, so as to prevent the outdoor environment from corroding the drive assembly.

[0013] Preferably, the extrusion mechanism comprises extrusion grooves opened on the opposite sides of the annular keel one and the annular keel two, the interiors of the two extrusion grooves are respectively provided with extrusion plates, the tops of the two extrusion plates are respectively fixedly installed with a plurality of evenly distributed anti-skid strips made of rubber material for increasing the friction between the extrusion plates and the surface of the cable; the interiors of the two extrusion grooves are respectively fixedly installed with an electric push rod two and two symmetrically distributed telescopic bases, the interiors of the two telescopic bases are respectively movably installed with telescopic rods which are fixedly connected with the extrusion plates for assisting the stable movement of the extrusion plates and ensuring the uniform adhesion of the extrusion plates to the surface of the cable; the telescopic end of the electric push rod two is fixedly connected with the extrusion plate, the extrusion plate is driven to move close to or away from the cable through the telescopic movement of the electric push rod two, and the positioning and unlocking of the device are realized.

[0014] Preferably, the telescopic assembly comprises two groups of fixed blocks fixedly installed at the bottom of the annular keel one, each group of the fixed blocks is divided into two and symmetrically distributed, a linkage plate is arranged between the two fixed blocks, a rotating shaft is installed between the linkage plate and the two fixed blocks, the rotating shaft is used to limit the rotation of the linkage plate along the fixed axis only, avoiding the structural deviation when the keels are separated, one side of the interior of the annular keel two is provided with two moving grooves for the movement of the linkage plates, a moving plate is connected between the two linkage plates, a fixed groove for the movement of the moving plate is arranged between the two moving grooves, the moving plate is used to synchronously drive the movement of the two linkage plates, ensuring the uniform opening of the two sides when the annular keel one and the annular keel two are separated, two positioning plates are inserted into one side of the annular keel two, the two positioning plates are matched with the moving plate, the locking of the moving plate is realized through the insertion of the positioning holes of the moving plate, the safety requirements of the overhead work are met, the two positioning plates extend to one side of the annular keel two and are fixedly installed with a control rod together, facilitating the single-person operation of the insertion and extraction of the positioning plate, one side of the fixed block is fixedly installed with an abutting block matched with the annular keel one, used to limit the maximum opening angle of the annular keel one and the annular keel two, preventing the damage of the linkage plate or the rotating shaft due to the excessive operation force.

[0015] Preferably, one side of the annular keel one and the annular keel two is provided with a scraper mechanism, the scraper mechanism comprises a plurality of connecting rods fixedly installed on one side of the annular keel one and the annular keel two, the plurality of connecting rods are divided into two groups and symmetrically distributed, each group of the connecting rods is fixedly connected with the annular keel one and the annular keel two, one side of each group of the connecting rods is fixedly installed with a linkage seat, and one side of the two linkage seats is fixedly installed with an annular scraper plate; the annular scraper plate is made of wear-resistant steel material, used to scrape off the dust, rust marks and other sundries on the surface of the cable when the device moves along the cable, ensuring that the transmission of the magnetoinductive guided wave signal is not interfered by the surface sundries.

[0016] Preferably, an electronic information board is fixedly installed on the top of the annular keel. The electronic information board is electrically connected to the magnetostrictive wave detector and is used to receive, display and store the detection data of the magnetostrictive wave detector in real time. Limiting arc strips are fixedly installed on both sides of the inner ring plastic keel. Limiting arc grooves are opened on both sides of the mounting groove for the limiting arc strips to slide. The limiting arc strips cooperate with the limiting arc grooves to limit the rotation trajectory of the inner ring plastic keel and prevent the inner ring plastic keel from deviating and causing the magnetostrictive wave detector to lose position control.

[0017] Preferably, both sides of the first and second annular keels are provided with a moving mechanism. The moving mechanism includes multiple sets of support plates fixedly installed on opposite sides of the first and second annular keels. Each set of support plates consists of two symmetrically distributed plates, and a moving wheel is installed between the two support plates. The moving wheel is made of polyurethane and is used for smooth movement of the device along the cable axis. Two control plates are fixedly installed on both sides of the first annular keel, and two extension blocks are fixedly installed on both sides of the second annular keel. An upper fixing plate is fixedly installed between the two control plates, and a lower fixing plate is fixedly installed between the two extension blocks. The upper and lower fixing plates are used to enhance the structural strength of the first and second annular keels and prevent deformation of the keels when the device moves or is being tested.

[0018] A method for detecting and monitoring the corrosion and breakage of steel wires inside a cable using a guided wave detector includes the following steps:

[0019] S1. Using the telescopic assembly, a single person pulls the control lever to move it outward, causing the two positioning plates to simultaneously disengage from the positioning holes of the moving plate. This pushes the first ring keel to rotate around the rotation axis of the linkage plate, causing the linkage plate to move within the moving groove. This separates the first and second ring keels to form an opening. The device is then fitted onto the outside of the cable. The first ring keel is rotated in the opposite direction to the closed state. The control lever is then pushed to insert the positioning plate into the positioning hole of the moving plate, completing the initial fixation of the device and the cable.

[0020] S2. Start the electric push rod two of the extrusion mechanism. The telescopic end of the electric push rod two pushes the extrusion plate to move in the extrusion groove. The telescopic rod in the telescopic seat extends and retracts synchronously to assist the extrusion plate to move smoothly until the anti-slip strip on the top of the extrusion plate is in close contact with the surface of the cable, and the annular keel one and annular keel two are firmly fixed on the cable.

[0021] S3. When it is necessary to move this device along the cable axis to change the detection position, start the electric push rod two to retract, so that the anti-slip strip is removed from the cable surface to cancel the positioning, push the device to move along the cable. During the movement, the ring shovel of the scraper mechanism scrapes away the debris on the cable surface. After moving to the target position, repeat step S to complete the positioning.

[0022] S4, the electric push rod one of the driving assembly is started, the telescopic end of the electric push rod one drives the moving block to move in the horizontal direction, the moving block drives the stabilizing plate to move in the opening slot along the rod body, the stabilizing plate drives the rack plate to move synchronously in the storage slot, the rack plate is meshed with the half tooth ring transmission, the half tooth ring drives the inner ring plastic keel to rotate in the adjusting groove, the limiting arc strips on both sides of the inner ring plastic keel slide along the limiting arc groove to limit the rotation track, finally the magnetostrictive wave detector is adjusted to the position that the optimal detection distance is kept with the surface of the cable and the signal attenuation area at the interface of the annular keel is avoided;

[0023] S5, start all the magnetostrictive wave detectors, the magnetostrictive wave detectors emit the magnetostrictive wave signals to the inside of the cable and receive the reflected signals, the corrosion degree and the number of broken wires of the steel wires in the cable are identified by analyzing the characteristics of the reflected signals, and the detection data are transmitted to the electronic information board in real time, and the electronic information board displays and classifies the data for storage, so that the operator can view the data in real time and trace the data subsequently.

[0024] Compared with the prior art, the beneficial effects achieved by the present application are:

[0025] The present application detects the steel wires in the cable by using the magnetostrictive wave detector, the magnetostrictive wave detection technology can penetrate into the inside of the cable and accurately detect the corrosion and broken wire conditions of the steel wires, compared with the traditional manual visual inspection that can only detect surface damage, the potential problems in the cable can be effectively identified, the detection accuracy is greatly improved, and compared with the ultrasonic detection, the ray detection and other non-destructive detection technologies, the magnetostrictive wave detection is less affected by the special structure of the cable, can cover a larger detection range, has higher detection precision, and provides a reliable basis for accurately evaluating the safety condition of the cable.

[0026] Through the unique telescopic assembly, the cooperation of the control rod, the positioning plate and the linkage plate and other components can easily realize the separation and closure of the annular keel one and the annular keel two, so that the device can be quickly sleeved outside the cable, the installation process is simple and fast, and a large amount of manpower is not needed, which is in sharp contrast with the complicated installation and disassembly of the traditional detection device, and the efficiency of the detection work is significantly improved, time and labor cost are saved, and the driving assembly in the adjusting mechanism can accurately adjust the detection position of the magnetostrictive wave detector in the mounting groove, the electric push rod one drives the moving block, the stabilizing plate and the rack plate to move, the half tooth ring is driven to rotate by the meshing of the rack plate and the half tooth ring, so that the position adjustment of the magnetostrictive wave detector is realized, and the connection between the annular keel one and the annular keel two is monitored. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the whole application;

[0028] Figure 2Structure diagram of the invention between the first ring keel and the second ring keel;

[0029] Figure 3 Structure diagram of the invention of the scraper mechanism;

[0030] Figure 4 Structure diagram of the invention of the adjusting mechanism;

[0031] Figure 5 Structure diagram of the invention of the adjusting mechanism when disassembled;

[0032] Figure 6 Structure diagram of the invention between the first ring keel and the second ring keel when disassembled;

[0033] Figure 7 Structure diagram of the invention of the moving mechanism;

[0034] Figure 8 Sectional view of the invention of the second ring keel;

[0035] Figure 9 Structure diagram of the invention of the moving mechanism;

[0036] Figure 10 Flow chart of the invention of the overall method.

[0037] 1, the first ring keel; 2, the second ring keel; 3, the electronic information board; 4, the protective cover; 5, the scraper mechanism; 6, the moving mechanism; 7, the moving wheel; 8, the support plate; 9, the extrusion mechanism; 10, the control board; 11, the extension block; 12, the upper fixed plate; 13, the lower fixed plate; 14, the half-tooth ring; 15, the inner ring plastic keel; 16, the magnetoinductive wave detector; 17, the limiting arc strip; 18, the electric push rod two; 19, the moving block; 20, the rack plate;

[0038] 501, the connecting rod; 502, the linkage seat; 503, the ring-shaped scraper plate;

[0039] 601, the fixed block; 602, the linkage plate; 603, the control rod; 604, the positioning plate; 605, the moving plate; 606, the abutting block;

[0040] 901, the telescopic seat; 902, the extrusion plate; 903, the electric push rod two; 904, the anti-skid strip. DETAILED DESCRIPTION

[0041] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0042] Please refer to Figure 1 and Figure 2 A device for monitoring the corrosion and breakage of internal steel wires of a cable, comprising:

[0043] A ring keel 1 is provided with a ring keel 2 at the bottom, two symmetrically distributed accommodation grooves are arranged between the ring keel 1 and the ring keel 2, and an inner ring plastic keel 15 is fixedly installed in each of the two accommodation grooves. A plurality of uniformly distributed magneto-acoustic wave detectors 16 are installed in the inner ring plastic keel 15. The magneto-acoustic wave detectors 16 are used to emit and receive magneto-acoustic wave signals to detect the corrosion and breakage of internal steel wires of the cable. All the magneto-acoustic wave detectors 16 are distributed circumferentially around the cable, and cover more than 90% of the circumferential detection area of the cable in the initial state.

[0044] Further, a control mechanism is arranged between the ring keel 1 and the ring keel 2, which is used to coordinate the action timing of each component of the adjusting mechanism, and ensure that the separation, closing of the ring keel 1 and the ring keel 2 and the adjusting process of the magneto-acoustic wave detector 16 are synchronized and stable.

[0045] Further, an electronic information plate 3 is fixedly installed at the top of the ring keel 1, and the electronic information plate 3 is electrically connected with the magneto-acoustic wave detector 16, which is used to receive, display and store the detection data of the magneto-acoustic wave detector 16 in real time. Limiting arc strips 17 are fixedly installed at both sides of the inner ring plastic keel 15. Limiting arc grooves are arranged at both sides of the accommodation grooves for the limiting arc strips 17 to slide. The limiting arc strips 17 and the limiting arc grooves are matched, which are used to limit the rotating track of the inner ring plastic keel 15, and prevent the inner ring plastic keel 15 from deviating to cause the position of the magneto-acoustic wave detector 16 out of control.

[0046] Reference Figure 3 and Figure 4, the adjusting mechanism is located between the annular keel one 1 and the installation groove, is used for adjusting the detection position of the magnetostrictive guided wave detector 16 in the installation groove, and is used for adapting the cable form deviation and the signal attenuation problem at the annular keel interface. The adjusting mechanism comprises a driving assembly, a pressing mechanism 9 and a telescopic assembly. The driving assembly is located at the top of the annular keel one 1 and is used for driving the magnetostrictive guided wave detector 16 to fine tune around the cable circumference, so that all the magnetostrictive guided wave detectors 16 can keep the optimal detection distance with the cable surface, and the detection precision is prevented from being reduced due to the spacing deviation. The pressing mechanism 9 is located between the annular keel one 1 and the annular keel two 2 and is used for closely positioning the annular keel one 1 and the annular keel two 2 on the cable, so that the device is prevented from sliding during the detection process, the relative position between the magnetostrictive guided wave detector 16 and the cable is stabilized, and the telescopic assembly is located in the interior of the annular keel two 2 and is used for realizing the separation and closure of the annular keel one 1 and the annular keel two 2. The opening size can be adjusted according to the cable diameter, so that the device is convenient to disassemble and assemble with different specifications of cables.

[0047] The adjusting mechanism further comprises a half-tooth ring 14 fixedly installed on the outer wall of the inner ring plastic keel 15. The top of the installation groove is provided with an adjusting groove for the rotation of the half-tooth ring 14. The top of the adjusting groove is provided with a receiving groove. The interior of the receiving groove is provided with a rack plate 20. The rack plate 20 is engaged with the half-tooth ring 14. The linear movement of the rack plate 20 drives the half-tooth ring 14 to rotate, and then drives the inner ring plastic keel 15 and the magnetostrictive guided wave detector 16 to rotate synchronously, so that the adjustment process is stable and the angle is accurate. The magnetic guided wave signal attenuation area at the interface of the annular keel one 1 and the annular keel two 2 can be avoided.

[0048] Further, the driving assembly comprises a stabilizing plate fixedly installed on the top of the rack plate 20. The top of the receiving groove is provided with an opening groove for the horizontal movement of the stabilizing plate. A rod body is fixedly installed in the interior of the opening groove. The rod body is inserted with the stabilizing plate. The rod body is used for guiding the movement of the stabilizing plate, preventing the stabilizing plate from deviating to cause the engagement misalignment between the rack plate 20 and the half-tooth ring 14, and ensuring the transmission accuracy of the driving assembly.

[0049] Further, the driving assembly further comprises an electric push rod one 18 fixedly installed on the top of the annular keel one 1. The stabilizing plate extends to the top of the opening groove and is fixedly installed with a moving block 19. The telescopic end of the electric push rod one 18 is fixedly connected with the moving block 19. The telescopic stroke of the electric push rod one 18 matches the fine tuning angle of the magnetostrictive guided wave detector 16. The top of the annular keel one 1 is fixedly installed with a protective cover 4. The interior of the protective cover 4 is provided with a protective cavity. The protective cavity corresponds to the electric push rod one 18 and the moving block 19 and is used for shielding rainwater and dust, avoiding the erosion of the driving assembly caused by the outdoor environment.

[0050] Reference Figures 5-9The extrusion mechanism 9 comprises extrusion grooves opened on opposite sides of the ring keel one 1 and the ring keel two 2, the inside of the two extrusion grooves is provided with an extrusion plate 902, the top of the two extrusion plates 902 is fixedly installed with a plurality of evenly distributed anti-skid strips 904 made of rubber material for increasing the friction between the extrusion plate 902 and the surface of the cable; the inside of the two extrusion grooves is fixedly installed with an electric push rod two 903 and two symmetrically distributed telescopic bases 901, the inside of the two telescopic bases 901 is movably installed with a telescopic rod, the two telescopic rods are fixedly connected with the extrusion plate 902 for assisting the stable movement of the extrusion plate 902 and ensuring that the extrusion plate 902 is uniformly attached to the surface of the cable; the telescopic end of the electric push rod two 903 is fixedly connected with the extrusion plate 902, the extrusion plate 902 is driven to move close to or away from the cable through the telescopic driving of the electric push rod two 903, and the positioning and unlocking of the device are realized;

[0051] Further, the telescopic assembly comprises two groups of fixed blocks 601 fixedly installed at the bottom of the ring keel one 1, each group of fixed blocks 601 is divided into two and symmetrically distributed, a linkage plate 602 is arranged between the two fixed blocks 601, a rotating shaft is installed between the linkage plate 602 and the two fixed blocks 601, the rotating shaft is used to limit the linkage plate 602 to rotate only along the fixed axis, so as to avoid structural deviation when the keels are separated, one side of the ring keel two 2 is provided with two moving grooves for the movement of the linkage plate 602, a moving plate 605 is connected between the two linkage plates 602, a fixed groove for the movement of the moving plate 605 is arranged between the two moving grooves, the moving plate 605 is used to synchronously drive the movement of the two linkage plates 602, so as to ensure that the openings on both sides are uniform when the ring keel one 1 and the ring keel two 2 are separated, one side of the ring keel two 2 is inserted with two positioning plates 604, the two positioning plates 604 are matched with the moving plate 605, the locking of the moving plate 605 is realized through the positioning holes inserted into the moving plate 605, the safety requirement of high-altitude operation is met, the control rod 603 is fixedly installed on one side of the two positioning plates 604 extending to one side of the ring keel two 2, the insertion and extraction of the positioning plate 604 is facilitated, the side of the fixed block 601 is fixedly installed with an abutting block 606 matched with the ring keel one 1, which is used to limit the maximum opening angle of the ring keel one 1 and the ring keel two 2, and prevent the linkage plate 602 or the rotating shaft from being damaged due to excessive operation force;

[0052] It should be noted that the telescopic assembly used in this embodiment to separate and close the annular keel 1 and the annular keel 2 includes components such as the fixing block 601, the linkage plate 602, the control rod 603, the positioning plate 604, the moving plate 605, and the abutment block 606. This is not a redundant design with a complex structure, but a necessary collaborative configuration based on the actual scenario of cable detection. The fixing block 601 provides stable rotational support for the linkage plate 602. The linkage plate 602, in cooperation with the moving plate 605, converts the keel rotation into precise displacement. The combination of the control rod 603 and the positioning plate 604 enables quick locking and unlocking under single-person operation. The abutment block 606 can prevent structural damage caused by excessive operation. Each component has a clear division of labor and works in concert. This ensures that the device can adapt to the installation requirements of cables of different diameters, and also ensures the structural stability during high-altitude operations through rigid positioning. At the same time, it takes into account the durability of repeated disassembly and assembly over a long period of time, fully serving the accuracy and practicality requirements of detecting rust and broken wires inside the cable.

[0053] refer to Figure 2 A scraper mechanism 5 is provided on one side of both the first ring keel and the second ring keel. The scraper mechanism 5 includes multiple connecting rods 501 fixedly installed on one side of the first ring keel and the second ring keel. The multiple connecting rods 501 are divided into two groups and symmetrically distributed. Each group of connecting rods 501 is fixedly connected to the first ring keel and the second ring keel. A linkage seat 502 is fixedly installed on one side of each group of connecting rods 501. An annular scraper plate 503 is fixedly installed on one side of the two linkage seats 502. The annular scraper plate 503 is made of wear-resistant steel and is used to scrape off dust, rust and other debris from the surface of the cable when the device moves along the cable, so as to ensure that the transmission of the magnetostrictive guided wave signal is not interfered with by surface debris.

[0054] Both sides of the annular keel 1 and annular keel 2 are provided with a moving mechanism 6. The moving mechanism 6 includes multiple sets of support plates 8 fixedly installed on opposite sides of the annular keel 1 and annular keel 2. Each set of support plates 8 is divided into two and symmetrically distributed. A moving wheel 7 is installed between the two support plates 8. The moving wheel 7 is made of polyurethane and is used for the device to move smoothly along the cable axis. Two control plates 10 are fixedly installed on both sides of the annular keel 1 and two extension blocks 11 are fixedly installed on both sides of the annular keel 2. An upper fixing plate 12 is fixedly installed between the two control plates 10 and a lower fixing plate 13 is fixedly installed between the two extension blocks 11. The upper fixing plate 12 and the lower fixing plate 13 are used to enhance the structural strength of the annular keel 1 and annular keel 2 and prevent the keel from deforming when the device moves or is tested.

[0055] It should be noted that the combination of the magnetostrictive guided wave detector and the adjustment mechanism in this embodiment is not a redundant design, but rather based on the dual requirements of "signal integrity" and "cable shape adaptability" in the actual scenario of cable detection. The specific logic is as follows:

[0056] Firstly, there is a small assembly gap at the interface between the ring keel 1 and the ring keel 2 due to splicing, which will cause local attenuation of the magnetostrictive guided wave signal when propagating to the cable area corresponding to the interface. Even if the magnetostrictive detectors 16 are evenly distributed on the inner ring plastic keel 15, the attenuated signal may still distort the detection data of the cable area near the interface. By adjusting the mechanism to fine-tune the inner ring plastic keel 15 and the detector as a whole, rather than just fixing the detector at the interface, the detector can be dynamically adjusted in the circumferential direction to avoid the signal attenuation area caused by the gap and directly aim at the cable body, reducing signal interference and avoiding secondary review caused by data distortion, thereby improving detection efficiency.

[0057] Secondly, in actual engineering, the cable is not absolutely regular cylindrical, and may have slight eccentricity, local surface protrusions and other shape deviations. If only additional detectors are fixed at the interface, they can cover the interface area, but the evenly distributed other detectors may deviate from the optimal detection distance due to the shape deviation of the cable. The adjusting mechanism can drive all the magnetostrictive detectors 16 to fine-tune synchronously along the limiting arc groove through the meshing transmission of the rack plate 20 and the half-tooth ring 14, so as to ensure that all the detectors including the interface can maintain the optimal detection distance with the cable surface, which not only solves the problem of signal attenuation at the interface, but also takes into account the overall detection accuracy under the shape deviation of the cable, avoiding detection blind area or abnormal data caused by improper spacing of local detectors

[0058] A method for detecting the corrosion and wire breakage of the internal steel wire of a cable, comprising the following steps:

[0059] S1, using the telescopic assembly, a single person pulls the control rod 603 outward to drive the two positioning plates 604 to synchronously separate from the positioning holes of the moving plate 605, and pushes the ring keel 1 to rotate around the rotating shaft of the linkage plate 602, so that the linkage plate 602 moves in the moving groove, and then separates the ring keel 1 from the ring keel 2 to form an opening. The device is set on the outside of the cable, and the ring keel 1 is rotated to the closed state in the reverse direction, the control rod 603 is pushed to make the positioning plate 604 inserted into the positioning hole of the moving plate 605, and the preliminary fixation of the device and the cable is completed.

[0060] S2, start the electric push rod two 903 of the extrusion mechanism 9, the telescopic end of the electric push rod two 903 pushes the extrusion plate 902 to move in the extrusion groove, and the telescopic rod in the telescopic seat 901 synchronously telescopes to assist the smooth movement of the extrusion plate 902, until the anti-slip strip 904 on the top of the extrusion plate 902 tightly contacts with the surface of the cable, and the ring keel 1 and the ring keel 2 are firmly fixed on the cable.

[0061] S3, when the device needs to be moved along the cable axis to replace the detection position, the electric push rod 903 is started to retract, the anti-skid strip 904 is separated from the cable surface to cancel the positioning, the device is pushed to move along the cable, the annular scraper plate 503 of the scraper mechanism 5 scrapes the sundries on the cable surface during the movement, and the positioning is completed by repeating the step S2 after the device moves to the target position;

[0062] S4, the electric push rod one 18 of the driving assembly is started, the telescopic end of the electric push rod one 18 drives the moving block 19 to move in the horizontal direction, the moving block 19 drives the stabilizing plate to move in the opening slot along the rod body, the stabilizing plate drives the rack plate 20 to move synchronously in the storage slot, the rack plate 20 is in meshing transmission with the half-tooth ring 14, the half-tooth ring 14 drives the inner ring plastic keel 15 to rotate in the adjusting slot, the limiting arc strips 17 on the two sides of the inner ring plastic keel 15 slide along the limiting arc slots to limit the rotation track, and finally the magnetostrictive guided wave detector 16 is adjusted to the position that is kept at the best detection distance from the cable surface and avoids the signal attenuation area at the interface of the annular keel;

[0063] S5, all the magnetostrictive guided wave detectors 16 are started, the magnetostrictive guided wave detectors 16 emit the magnetostrictive guided wave signals to the inside of the cable and receive the reflected signals, the rust degree and the number of broken wires of the steel wires in the cable are identified by analyzing the characteristics of the reflected signals, and the detection data are transmitted to the electronic information board 3 in real time, the electronic information board 3 displays and classifies the data for storage, so that the operator can view the data in real time and trace the subsequent data.

[0064] The working principle of the whole application is as follows:

[0065] When the device needs to be installed on the cable, the operator pulls the control rod 603, the control rod 603 drives the positioning plate 604 to move, after the positioning plate 604 moves, the annular keel one 1 drives the plurality of fixed blocks 601 to move, the plurality of fixed blocks 601 drive the linkage plate 602 to move, the linkage plate 602 drives the moving plate 605 to move, when the moving plate 605 moves to the top, the two positioning plates 604 are inserted into the annular keel two 2 through the control rod 603, the moving plate 605 is positioned through the two positioning plates 604, at this time, the annular keel one 1 and the annular keel two 2 form an opening, the annular keel one 1 is turned to enlarge the opening, and the annular keel one 1 and the annular keel two 2 are put into the cable to be monitored, and the annular keel one 1 and the annular keel two 2 are closed in the same way;

[0066] After the device is installed, the second electric push rod 903 of the extrusion mechanism 9 is started, the telescopic end of the second electric push rod 903 pushes the extrusion plate 902 to move in the extrusion groove, the telescopic rod on the extrusion plate 902 moves in the telescopic seat 901, ensuring the stable movement of the extrusion plate 902, with the movement of the extrusion plate 902, the anti-skid strip 904 on the top thereof is in close contact with the cable, the annular keel 1 and the annular keel 2 are fixed on the cable by the friction force of the anti-skid strip 904, preventing the device from sliding during detection, when the device needs to move on the cable, the positioning effect of the extrusion mechanism 9 can be cancelled by repeating the above operation;

[0067] The pushing device moves along the cable, during the movement, the connecting rod 501 on one side of the annular keel 1 and the annular keel 2 is fixedly connected with the linkage seat 502, the linkage seat 502 is fixedly connected with the annular shovel plate 503, the annular shovel plate 503 can scrape off the sundries on the surface of the cable, thereby providing a clean detection environment for subsequent detection work;

[0068] The first electric push rod 18 of the driving assembly is started, the telescopic end of the first electric push rod 18 drives the moving block 19 to move, the moving block 19 is fixed on the stabilizing plate, the stabilizing plate moves along the rod body in the open groove, the rod body plays a guiding and stabilizing role, the movement of the stabilizing plate drives the rack plate 20 fixed therewith to move in the storage groove, since the rack plate 20 is engaged with the half-tooth ring 14, the movement of the rack plate 20 can make the half-tooth ring 14 rotate, the half-tooth ring 14 is fixed on the outer wall of the inner ring plastic keel 15, the rotation of the half-tooth ring 14 drives the inner ring plastic keel 15 to rotate in the installation groove, the limiting arc strips 17 on the two sides of the inner ring plastic keel 15 slide in the limiting arc grooves, ensuring the stable rotation of the inner ring plastic keel 15, thereby realizing the adjustment of the detection position of the magnetostrictive guided wave detector 16 in the installation groove, meeting the monitoring of the interface between the annular keel 1 and the annular keel 2, and improving the overall detection efficiency;

[0069] The magnetostrictive guided wave detector 16 detects the corrosion and wire breakage of the internal steel wire of the cable at the adjusted detection position, the magnetostrictive guided wave detector 16 emits guided wave signals to the internal steel wire of the cable by using the principle of magnetostrictive guided wave, when the guided wave signals meet the corrosion or wire breakage position, the signals will be reflected and changed, the magnetostrictive guided wave detector 16 receives and analyzes these changed signals, and transmits the detected data to the electronic information plate 3, the electronic information plate 3 processes and displays the data, and the operator can obtain the corrosion and wire breakage of the internal steel wire of the cable through the electronic information plate 3.

[0070] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits thereof, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A guided wave detection and monitoring device for corrosion and broken wires inside a cable, characterized in that, include: Annular keel one (1), annular keel two (2) is installed at the bottom of the annular keel one (1), two symmetrically distributed mounting slots are opened between the annular keel one (1) and the annular keel two (2), and an inner ring plastic keel (15) is fixedly installed inside the two mounting slots. Multiple uniformly distributed magnetostrictive wave detectors (16) are installed inside the inner ring plastic keel (15). The magnetostrictive wave detectors (16) are used to transmit and receive magnetostrictive wave signals to detect the corrosion and breakage of the steel wire inside the cable, and all magnetostrictive wave detectors (16) are distributed around the circumference of the cable. The control mechanism is located between the first ring keel (1) and the second ring keel (2) and is used to coordinate the timing of the actions of each component of the adjustment mechanism to ensure that the separation and closure of the first ring keel (1) and the second ring keel (2) and the adjustment process of the magnetostrictive waveguide detector (16) are synchronized and stable. An adjustment mechanism is located between the first annular keel (1) and the mounting groove. It is used to adjust the detection position of the magnetostrictive wave detector (16) in the mounting groove to adapt to the cable shape deviation and signal attenuation at the annular keel interface. The adjustment mechanism includes a drive component, a pressing mechanism (9), and a telescopic component. The drive component is located at the top of the first annular keel (1) and is used to drive the magnetostrictive wave detector (16) to make fine adjustments around the cable circumference to ensure that all magnetostrictive wave detectors (16) can maintain the optimal detection distance from the cable surface and avoid the decrease in detection accuracy due to spacing deviation. The pressing mechanism (9) is located between the first annular keel (1) and the second annular keel (2) and is used to tightly position the first annular keel (1) and the second annular keel (2) on the cable. To prevent the device from sliding during the detection process and ensure the relative position stability of the magnetostrictive wave detector (16) and the cable, the telescopic component is located inside the second annular keel (2) and is used to realize the separation and closure of the first annular keel (1) and the second annular keel (2). The size of the opening can be adjusted according to the diameter of the cable to facilitate the disassembly and assembly of the device and cables of different specifications. The telescopic component includes two sets of fixing blocks (601) fixedly installed at the bottom of the first annular keel (1). Each set of fixing blocks (601) is divided into two and symmetrically distributed. A linkage plate (602) is provided between the two fixing blocks (601). A rotating shaft is installed between the linkage plate (602) and the two fixing blocks (601). The rotating shaft is used to limit the linkage plate (602) to rotate only along the fixed axis to prevent the keel from rotating. When the structure shifts during separation, two moving slots are opened on one side of the inner side of the second annular keel (2) for the movement of the linkage plate (602). A moving plate (605) is connected between the two linkage plates (602). A fixed slot is opened between the two moving slots for the movement of the moving plate (605). The moving plate (605) is used to synchronously drive the two linkage plates (602) to move, ensuring that the openings on both sides are uniform when the first annular keel (1) and the second annular keel (2) are separated. Two positioning plates (604) are inserted into one side of the second annular keel (2). Both positioning plates (604) cooperate with the moving plate (605). The movable plate (605) is locked by inserting into the positioning hole of the movable plate (605) to meet the safety requirements of high-altitude operation. The two positioning plates (604) extend to one side of the ring keel two (2) and are jointly fixedly installed with a control rod (603) to facilitate the insertion and removal of the positioning plate (604) by a single person. A stop block (606) is fixedly installed on one side of the fixed block (601). The stop block (606) matches the ring keel one (1) and is used to limit the maximum opening angle between the ring keel one (1) and the ring keel two (2) to prevent damage to the linkage plate (602) or the rotating shaft due to excessive operating force.

2. The guided wave detection and monitoring device for corrosion and wire breakage of internal steel wires in a cable according to claim 1, characterized in that: The adjustment mechanism also includes a semi-toothed ring (14) fixedly installed on the outer wall of the inner ring plastic keel (15). The top of the placement groove is provided with an adjustment groove for the semi-toothed ring (14) to rotate. The top of the adjustment groove is provided with a storage groove. The storage groove is provided with a rack plate (20). The rack plate (20) meshes with the semi-toothed ring (14). The linear movement of the rack plate (20) drives the semi-toothed ring (14) to rotate, thereby driving the inner ring plastic keel (15) and the magnetostrictive wave detector (16) to rotate synchronously, ensuring that the adjustment process is smooth and the angle is accurate, and avoiding the magnetostrictive wave signal attenuation area at the interface of the ring keel one (1) and the ring keel two (2).

3. The guided wave detection and monitoring device for corrosion and wire breakage of internal steel wires in a cable according to claim 2, characterized in that: The drive assembly includes a stabilizing plate fixed to the top of the rack plate (20). The top of the receiving slot has an opening for horizontal movement of the stabilizing plate. A rod is fixedly installed inside the opening, and the rod is inserted into the stabilizing plate. The rod guides the movement of the stabilizing plate, preventing misalignment of the rack plate (20) and the semi-toothed ring (14) due to plate displacement, thus ensuring proper engagement. The transmission accuracy of the obstacle drive component.

4. The guided wave detection and monitoring device for corrosion and wire breakage of internal steel wires in a cable according to claim 3, characterized in that: The drive assembly also includes an electric push rod (18) fixedly installed on the top of the annular keel (1). The stabilizing plate extends to the top of the opening slot and a moving block (19) is fixedly installed thereon. The telescopic end of the electric push rod (18) is fixedly connected to the moving block (19). The telescopic stroke of the electric push rod (18) matches the fine-tuning angle of the magnetostrictive waveguide detector (16). A protective cover (4) is fixedly installed on the top of the annular keel (1). A protective cavity is opened inside the protective cover (4). The protective cavity corresponds to the electric push rod (18) and the moving block (19) and is used to shield against rain and dust and prevent the outdoor environment from corroding the drive assembly.

5. The guided wave detection and monitoring device for corrosion and wire breakage of internal steel wires in a cable according to claim 1, characterized in that: The extrusion mechanism (9) includes extrusion grooves on opposite sides of the annular keel one (1) and the annular keel two (2). Each of the two extrusion grooves is equipped with an extrusion plate (902). Multiple evenly distributed anti-slip strips (904) are fixedly installed on the top of each of the two extrusion plates (902). The anti-slip strips (904) are made of rubber to increase the friction between the extrusion plate (902) and the cable surface. Each of the two extrusion grooves is also fixedly equipped with an electric push rod two (903) and two symmetrical... The device is equipped with two telescopic seats (901), each with a telescopic rod inside. Both telescopic rods are fixedly connected to the extrusion plate (902) to assist the extrusion plate (902) in moving smoothly and to ensure that the extrusion plate (902) is evenly attached to the surface of the cable. The telescopic end of the electric push rod (903) is fixedly connected to the extrusion plate (902). The electric push rod (903) drives the extrusion plate (902) to move closer to or away from the cable, thereby achieving the positioning and unlocking of the device.

6. The guided wave detection and monitoring device for corrosion and wire breakage of steel wires inside a cable according to claim 1, characterized in that: A scraper mechanism (5) is provided on one side of both the first ring keel (1) and the second ring keel (2). The scraper mechanism (5) includes multiple connecting rods (501) fixedly installed on one side of the first ring keel (1) and the second ring keel (2). The multiple connecting rods (501) are divided into two groups and symmetrically distributed. Each group of connecting rods (501) is fixed to the first ring keel (1) and the second ring keel (2). The connection is provided with a linkage seat (502) fixedly installed on one side of each set of connecting rods (501), and an annular shovel plate (503) fixedly installed on one side of the two linkage seats (502); the annular shovel plate (503) is made of wear-resistant steel and is used to scrape off dust, rust and debris from the surface of the cable when the device moves along the cable, so as to ensure that the transmission of magnetostrictive guided wave signal is not interfered with by surface debris.

7. The guided wave detection and monitoring device for corrosion and wire breakage of steel wires inside a cable according to claim 1, characterized in that: An electronic information board (3) is fixedly installed on the top of the ring keel (1). The electronic information board (3) is electrically connected to the magnetostrictive wave detector (16) and is used to receive, display and store the detection data of the magnetostrictive wave detector (16) in real time. Limiting arc strips (17) are fixedly installed on both sides of the inner ring plastic keel (15). Limiting arc grooves for sliding of the limiting arc strips (17) are opened on both sides of the mounting groove. The limiting arc strips (17) cooperate with the limiting arc grooves to limit the rotation trajectory of the inner ring plastic keel (15) and prevent the inner ring plastic keel (15) from shifting and causing the magnetostrictive wave detector (16) to lose position control.

8. The guided wave detection and monitoring device for corrosion and wire breakage of steel wires inside a cable according to claim 1, characterized in that: Both sides of the first ring keel (1) and the second ring keel (2) are provided with a moving mechanism (6). The moving mechanism (6) includes multiple sets of support plates (8) fixedly installed on opposite sides of the first ring keel (1) and the second ring keel (2). Each set of support plates (8) is divided into two and symmetrically distributed. A moving wheel (7) is installed between the two support plates (8). The moving wheel (7) is made of polyurethane and is used for the device to move smoothly along the cable axis. Two control plates (10) are fixedly installed on both sides of the first ring keel (1). Two extension blocks (11) are fixedly installed on both sides of the second ring keel (2). An upper fixing plate (12) is fixedly installed between the two control plates (10). A lower fixing plate (13) is fixedly installed between the two extension blocks (11). The upper fixing plate (12) and the lower fixing plate (13) are used to enhance the structural strength of the first ring keel (1) and the second ring keel (2) and prevent the keel from deforming when the device moves or is tested.

9. A method for detecting and monitoring the corrosion and breakage of steel wires inside a cable using a guided wave detection and monitoring device as described in any one of claims 1-8, characterized in that... The characteristics include the following steps: S1. Using the telescopic assembly, a single person pulls the control lever (603) to move outward, causing the two positioning plates (604) to simultaneously disengage from the positioning holes of the moving plate (605), pushing the first ring keel (1) to rotate around the rotation axis of the linkage plate (602), causing the linkage plate (602) to move in the moving groove, thereby separating the first ring keel (1) and the second ring keel (2) to form an opening, and placing the device on the outside of the cable. Rotate the first ring keel (1) in the opposite direction to the closed state, push the control lever (603) to insert the positioning plate (604) into the positioning hole of the moving plate (605), and complete the initial fixation of the device and the cable. S2. Start the electric push rod 2 (903) of the extrusion mechanism (9). The telescopic end of the electric push rod 2 (903) pushes the extrusion plate (902) to move in the extrusion groove. The telescopic rod in the telescopic seat (901) extends and retracts synchronously to assist the extrusion plate (902) to move smoothly until the anti-slip strip (904) on the top of the extrusion plate (902) is in close contact with the surface of the cable, and the ring keel 1 (1) and the ring keel 2 (2) are firmly fixed on the cable. S3. When it is necessary to move this device along the cable axis to change the detection position, start the electric push rod two (903) to retract, so that the anti-slip strip (904) is removed from the cable surface to cancel the positioning, and push the device to move along the cable. During the movement, the ring shovel plate (503) of the scraper mechanism (5) scrapes away the debris on the cable surface. After moving to the target position, repeat step S2 to complete the positioning. S4. Start the electric push rod (18) of the drive assembly. The telescopic end of the electric push rod (18) drives the moving block (19) to move horizontally. The moving block (19) drives the stabilizing plate to move along the rod body in the opening slot. The stabilizing plate drives the rack plate (20) to move synchronously in the storage slot. The rack plate (20) meshes with the half-tooth ring (14) to drive the half-tooth ring (14) to rotate the inner ring plastic keel (15) in the adjustment slot. The limiting arc strips (17) on both sides of the inner ring plastic keel (15) slide along the limiting arc groove to limit the rotation trajectory. Finally, the magnetostrictive waveguide detector (16) is adjusted to the position to maintain the best detection distance from the cable surface and avoid the signal attenuation area at the ring keel interface. S5. Activate all magnetostrictive wave detectors (16). The magnetostrictive wave detectors (16) emit magnetostrictive wave signals into the cable and receive reflected signals. The internal structure of the cable is identified by analyzing the characteristics of the reflected signals. The degree of rust and the number of broken wires of the steel wire are detected and transmitted to the electronic information board (3) in real time. The electronic information board (3) displays, classifies and stores the data so that operators can view it in real time and trace the data later.

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