Nondestructive ultrasonic detection device for steel wire rope

Abstract

The invention relates to a nondestructive ultrasonic detection device for a steel wire rope, which comprises a cylindrical first flexible pressure cavity, the center of which forms a channel for the steel wire rope to pass through; the at least one ultrasonic probe is fixed on the side wall of the first flexible pressure cavity; the fixed seat is fixed relative to the first end of the first flexible pressure cavity; and the movable seat is connected with the second end of the first flexible pressure cavity and can move along the axial direction relative to the fixed seat. The device can be self-adaptive to detection of steel wire ropes with different diameters, meanwhile, the detection device is suitable for dynamic detection of defects of the steel wire ropes, and in the detection process, the defect position can be quickly positioned through self-adaptive adjustment of the device.

Description

Technical Field

[0001] This invention belongs to the field of non-destructive testing technology for steel wire ropes, and specifically relates to a non-destructive ultrasonic testing device for steel wire ropes. Background Technology

[0002] With rapid industrial development, wire ropes are widely used in various fields, including industrial production, tourism, coal mining, shipbuilding, and daily lifting and hoisting, where they serve as traction, load-bearing, and connecting components. Prolonged use under heavy loads can easily lead to wire breakage, loosening, and wear damage. Use in harsh environments can cause corrosion and shrinkage, reducing load-bearing capacity and increasing the risk of accidents that could endanger personal and equipment safety. Therefore, defect detection of wire ropes before and after use is crucial. Ultrasonic testing is a non-destructive testing technique that utilizes the propagation characteristics of high-frequency sound waves (>20 kHz) within materials to detect defects. Ultrasonic probes detect echoes from the subsurface and inner layers of the wire rope. When defects (rust, broken wires, wear, extrusion, deformation, melting, welding, etc.) exist in the subsurface and inner layers, the echoes will change; different types of defects produce different echo signals. By analyzing the reflection, transmission, and scattering signals of the sound waves, the location, size, and nature of the defects can be accurately determined.

[0003] Traditional ultrasonic flaw detection devices have several drawbacks. First, the ultrasonic probes use rigid connections, which can easily damage them. Second, because the probes are fixed in position, they are difficult to adapt to the inspection of steel wire ropes of different diameters. Third, the steel wire rope continuously passes through the detection device, and the ultrasonic probe collects the defect features inside the steel wire rope. Since the steel wire rope is in a continuous forward dynamic process, by the time the probe collects the complete defect location feature signal, the defect location has usually moved out of the probe's coverage area. If it is necessary to reposition the probe to the defect location, the steel wire rope must be manually pulled back. The pullback distance is difficult to control and can easily cause disorder in the detection data, affecting the detection results. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a non-destructive ultrasonic testing device for steel wire ropes. This device can adapt to the testing of steel wire ropes of different diameters. At the same time, the testing device is suitable for the dynamic detection of defects in steel wire ropes. During the testing process, the device can quickly locate the defect position through its own adaptive adjustment.

[0005] The technical solution of the present invention is to provide a non-destructive ultrasonic testing device for steel wire ropes, comprising:

[0006] A cylindrical first flexible pressure chamber, with a channel formed in the center for the steel wire rope to pass through;

[0007] At least one ultrasonic probe is fixed to the side wall of the first flexible pressure chamber;

[0008] A fixed seat is kept relatively fixed to the first end of the first flexible pressure chamber;

[0009] A movable seat is connected to the second end of the first flexible pressure chamber and can move axially relative to the fixed seat;

[0010] The first flexible pressure chamber is configured such that, during wire rope testing, its internal pressure is increased to a first pressure value, causing it to expand radially so that its channel size adapts to the diameter of the wire rope; when it is necessary to move the ultrasonic probe along the axial direction of the wire rope, its internal pressure is increased to a second pressure value higher than the first pressure value, causing it to produce additional axial elongation, thereby pushing the movable seat away from the fixed seat, and thus driving the ultrasonic probe to perform axial position fine adjustment.

[0011] In the detection device of this invention, the ultrasonic probe is fixed to the side wall of the flexible pressure chamber, which is less likely to damage the probe. The size of the channel for the steel wire rope to pass through can be adjusted by adjusting the pressure value inside the flexible pressure chamber, accommodating steel wire ropes of different diameters and allowing them to pass smoothly. Simultaneously, the distance between the ultrasonic probe and the steel wire rope can be adjusted by the pressure value, enabling stable signal acquisition by the ultrasonic probe. When a defect is detected in the steel wire rope and the location needs to be quickly repositioned, the movement of the steel wire rope is stopped and the pressure value inside the flexible pressure chamber is increased, causing additional axial elongation. This pushes the movable seat away from the fixed seat, thereby causing the ultrasonic probe to perform axial position fine-tuning and quickly locate the defect. The ultrasonic probe can adapt to the defect location without adjusting the position of the steel wire rope.

[0012] Preferably, an axially extendable connecting mechanism is provided between the fixed seat and the movable seat.

[0013] Preferably, the connecting mechanism is a rocker mechanism, with its two ends hinged to the fixed base and the movable base, respectively. This rocker mechanism also facilitates the installation of the wires of the flaw detection probe.

[0014] Preferably, the system further includes a second flexible pressure chamber coaxially arranged with the first flexible pressure chamber and located outside the connecting mechanism. The two ends of the second flexible pressure chamber are connected to the fixed seat and the movable seat, respectively, to provide auxiliary thrust to the movable seat during pressurization. This also protects the internal structure.

[0015] Preferably, there are multiple ultrasonic probes arranged circumferentially along the sidewall of the first flexible pressure cavity.

[0016] Preferably, the sidewall of the first flexible pressure chamber has a through hollow support column for assembling the ultrasonic probe.

[0017] Preferably, the system also includes a coupling medium providing system, the system comprising:

[0018] Coupled medium storage device;

[0019] A pumping device, the inlet of which is connected to the coupling medium storage device;

[0020] A coupling medium supply device, which is connected to the outlet of the pumping device via a pipe, is used to supply a coupling medium to the surface of the wire rope.

[0021] Preferably, the coupling medium storage device is provided with a nanobubble generating mechanism to generate nanobubbles and mix them into the coupling medium to form a gas-liquid two-phase coupling medium.

[0022] Incorporating uniformly sized nanobubbles into the coupling medium and allowing them to flow at a relatively stable speed reduces the medium's density and volume. Furthermore, the gas-liquid two-phase coupling medium is gentler than a pure liquid medium, making it less likely to erode the surface of the steel wire rope, such as rust, resulting in more accurate test results. A small number of uniform nanobubbles have minimal impact on ultrasonic testing; after subsequent flow guidance and constraint adjustments by the constraint device, their influence is almost negligible.

[0023] Preferably, the magnetization module further includes an annular first shield, the outer periphery of which is closed, and the inner periphery is open and fitted with the first fixed seat. The first movable seat and the first excitation coil are arranged within the annular cavity of the first shield. The shield is a magnetic shield.

[0024] Preferably, the coupling medium providing device is an annular spray head with multiple spray holes on its inner wall, forming an annular water curtain generator.

[0025] Preferably, a connecting sleeve is provided between the coupling medium providing device and the end of the first flexible pressure chamber; the connecting sleeve is a cylindrical structure made of elastic material, and a radially adjustable variable diameter constraint mechanism is provided inside, which is configured to adapt to steel wire ropes of different diameters.

[0026] Preferably, the variable diameter constraint mechanism includes:

[0027] The support sleeve is fitted tightly against the inner wall of the connecting sleeve;

[0028] The louvered reducer is located inside the support sleeve and is entirely within the enclosed cavity of the connecting sleeve. It has a flow guide / guide section that faces the coupling medium supply device and is flared, and a constraint section that faces the first flexible pressure chamber and is cylindrical.

[0029] The force transmission mechanism is located between the support sleeve and the louvered reducer and connects the support sleeve and the louvered reducer respectively.

[0030] The connecting cylinder has one end sealed to the outer periphery of the coupling medium supply device and the other end connected to the end of the flow guide / guide section of the louvered reducer.

[0031] Both the connecting sleeve and the connecting cylinder have closed structures on their periphery. Together, they form a sealed space between the spray head and the first flexible pressure chamber to prevent leakage of the coupling medium.

[0032] The variable diameter constraint mechanism guides the coupling medium and better constrains it to the surface of the wire rope. It also guides the wire rope as it enters, making it enter the detection channel of the first flexible pressure chamber more stably. At the same time, its louvered variable diameter tube design can also adapt to the detection of wire ropes of different diameters.

[0033] Preferably, the inner circumferential side of the confining section of the louvered reducer has circumferentially arranged arc-shaped protrusions. These arc-shaped protrusions contact the surface of the wire rope as it passes through, thus limiting its movement while also reducing the contact area between the wire rope and the louvered reducer.

[0034] Preferably, the system also includes a coupling medium collection device, which is disposed on the movable seat and is used to collect the coupling medium intercepted from the surface of the wire rope. The coupling medium is connected to the coupling medium storage device to realize the recycling of the coupling medium.

[0035] Preferably, the device also includes a front sealing device and a rear sealing device located at both ends of the axial direction of the wire rope non-destructive ultrasonic testing device to prevent leakage of the coupling medium.

[0036] Furthermore, both the front sealing device and the rear sealing device are louvered sealing rings.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] This invention is applicable to the dynamic detection of steel wire ropes of different diameters, and can quickly locate the defect position through the adaptive adjustment of the device itself. Attached Figure Description

[0039] Figure 1 This is a cross-sectional view of the device described in this application.

[0040] Figure 2 for Figure 1 Enlarged view of section A.

[0041] Figure 3 This is an exploded view of the device described in this application.

[0042] Figure 4 This is a schematic diagram of the assembly structure of the device after removing the outer casing and the introductory group.

[0043] In the picture:

[0044] 1. Ultrasonic testing system; 11. First flexible pressure chamber; 11a. Hollow support column; 12. Ultrasonic probe; 13. Fixed base; 14. Movable base; 15. Rocker mechanism; 15a. Wire assembly hole; 16. Second flexible pressure chamber; 17. Air pump;

[0045] 2. Coupling medium supply system; 21. Coupling medium storage device; 22. Pumping device; 23. Coupling medium supply device; 24. Coupling medium collection device; 25. Connecting sleeve; 26. Variable diameter constraint mechanism; 26a. Louvered reducer; 26b. Support sleeve; 26c. Force transmission mechanism; 26d. Connecting cylinder; 26e. Arc-shaped protrusion; 27. Support;

[0046] 3. Front sealing device;

[0047] 4. Rear sealing device;

[0048] 5. Integrated controller;

[0049] 6. Outer casing;

[0050] 7. Passive guide wheel assembly;

[0051] 8. Steel wire rope. Detailed Implementation

[0052] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0053] like Figures 1-4 As shown, a non-destructive ultrasonic testing device for steel wire rope includes an ultrasonic testing system 1 comprising a cylindrical first flexible pressure chamber 11, at least one ultrasonic probe 12, a fixed base 13, and a movable base 14. The center of the first flexible pressure chamber forms a channel for the steel wire rope to pass through. The ultrasonic probe 12 is fixed to the side wall of the first flexible pressure chamber. The fixed base 13 is relatively fixed to the first end of the first flexible pressure chamber 11. The movable base 14 is connected to the second end of the first flexible pressure chamber and can move axially relative to the fixed base 13. The first flexible pressure chamber 11 is configured such that, during the testing of the steel wire rope 8, its internal pressure is increased to a first pressure value, causing it to expand radially to adapt the channel size to the diameter of the steel wire rope, allowing the steel wire rope to pass smoothly. When it is necessary to move the ultrasonic probe 12 forward along the axial direction of the steel wire rope 8, its internal pressure is increased to a second pressure value higher than the first pressure value, causing the first flexible pressure chamber to produce additional axial elongation, thereby pushing the movable base 14 to move away from the fixed base 13, and thus causing the ultrasonic probe 12 to perform axial position fine-tuning in the direction of the steel wire rope's travel.

[0054] In some embodiments, the first flexible pressure chamber adopts a cylindrical flexible inner airbag structure. The center of the airbag forms a channel for the steel wire rope to pass through. The side wall of the airbag has a hollow support column 11a, which is used to assemble the ultrasonic probe 12. The hollow support column penetrates the inner and outer walls of the airbag and is circumferentially closed, so as not to affect the airbag itself. It forms a radial through-hole structure. The ultrasonic probe 12 is assembled in the through-hole structure and is completely covered in the through-hole. The wiring end faces outward and is connected to the wire, while the probe end faces inward. When the airbag is inflated, the probe is always located in the through-hole to avoid the probe from contacting the steel wire rope and damaging the probe.

[0055] In some embodiments, there are multiple ultrasonic probes 12, which are evenly arranged circumferentially along the sidewall of the flexible inner air bladder, such as... Figure 2 In the illustrated embodiment, three ultrasonic probes are provided; however, other numbers may be used in other embodiments. Correspondingly, the flexible inner air bladder has three radially penetrating hollow support columns on its sidewalls.

[0056] To ensure the flexible inner airbag remains stable at any axial position when inflated, an axially extendable connecting mechanism is provided between the fixed seat and the movable seat. In one embodiment, this connecting mechanism is a rocker mechanism 15. The rocker structure forms a ring-shaped rocker arm that surrounds the outer periphery of the flexible inner airbag, with its two ends hinged to the fixed seat 13 and the movable seat 14, respectively. The ring-shaped rocker arm, together with the fixed seat and the movable seat, forms a follow-up variable-pitch frame. When the flexible inner airbag inflates and undergoes axial displacement, pushing the movable seat 14 in the direction of the steel wire rope, the ring-shaped rocker arm extends accordingly, providing support for the movable seat 14. Simultaneously, the ring-shaped rocker arm structure facilitates the installation and fixation of the ultrasonic probe 12's wires. A radial through hole is provided on the ring-shaped rocker arm at a position corresponding to the ultrasonic probe; this radial through hole serves as a wire assembly hole 15a for installing and fixing the ultrasonic probe's connecting wires.

[0057] In some embodiments, both the fixed seat 13 and the movable seat 14 are annular plates. The central hole of the annular plate is a through hole for the steel wire rope 8 to pass through. The fixed seat is located at the front end (where the steel wire rope passes through first), and the movable seat is located at the rear end. The two ends of the flexible inner airbag are coaxially connected to the fixed seat and the movable seat, respectively. That is, both ends of the inner airbag are connected to the annular plates of the dynamic pitch frame.

[0058] In some embodiments, a second flexible pressure chamber 16 is also included. This second flexible pressure chamber may adopt a flexible outer airbag structure, which covers the outer periphery of the follower variable pitch frame and is arranged coaxially with the flexible inner airbag. The two ends of the flexible outer airbag in the axial direction are connected to the fixed seat 13 and the movable seat 14, respectively, to provide auxiliary thrust to the movable seat 14 during inflation and to form a double protection, while also protecting the internal structure. To simplify the device structure and reduce the weight of the device, the inner and outer flexible airbags can be inflated and deflated by the same air pump 17, which is a bidirectional air pump.

[0059] Ultrasonic testing requires coating the surface of the material to be tested with a coupling medium. The testing apparatus of this application further includes a coupling medium supply system 2, located at the front end of the ultrasonic testing section (i.e., before entering the ultrasonic testing section), used to spray the coupling medium onto the surface of the steel wire rope 8 to be tested. In one embodiment, the coupling medium storage device includes a coupling medium storage device 21, a pumping device 22, and a coupling medium supply device 23. The coupling medium storage device stores the ultrasonic coupling medium, the coupling medium supply device provides the coupling medium to the surface of the steel wire rope, the inlet of the pumping device is connected to the coupling medium storage device via a pipe, and the outlet of the pumping device is connected to the coupling medium supply device via a pipe. The pumping device transports the coupling medium from the coupling medium storage device to the coupling medium supply device and provides power to the coupling medium supply device, supplying the coupling medium to the surface of the steel wire rope to be tested.

[0060] In some embodiments, the coupling medium storage device 21 may be an annular circulating water tank, with the channel surrounding the fixed base 13 fixed to it. The coupling medium supply device 23 is an annular spray head, with multiple spray holes on its inner wall, forming an annular water curtain generator. The pumping device 22 uses a high-pressure circulating water pump, with its inlet connected to the circulating water tank via a water pipe and its outlet connected to the inlet of the spray head via a water pipe. Under the power of the circulating water pump, the coupling medium is sprayed onto the surface of the steel wire rope under test in a water curtain shape and flows axially with the steel wire rope.

[0061] The coupling medium is collected after it moves axially with the wire rope to the tail end of the device. Therefore, as an embodiment, a coupling medium collection device 24 is also included. The coupling medium collection device is set on the movable seat 14 and is used to collect the coupling medium intercepted from the surface of the wire rope. The coupling medium collection device 24 is connected to the coupling medium storage device 21 to realize the recycling of the coupling medium.

[0062] In some embodiments, the coupling medium collection device is a hollow annular structure (circulating water collection ring), with a central hole for a steel wire rope to pass through. It is coaxially fixed to the outside of the movable seat 14, and has an annular groove on its inner circumferential surface. Water passage holes are evenly distributed at the bottom of the groove. The hollow annular structure of the circulating water collection ring is connected to the circulating water tank through a water pipe. The circulating water tank is connected to the circulating water pump. During the operation of the circulating water pump, a negative pressure state is formed inside the circulating water tank. The circulating water collection ring is connected to the circulating water tank, so a negative pressure is also formed inside the circulating water collection ring. Under the action of negative pressure, the coupling medium on the inner circumference of the circulating water collection ring is sucked into its hollow cavity and returned to the circulating water tank, forming an internal circulation of the coupling medium.

[0063] The coupling medium forms an internal circulation within the detection device. Therefore, sealing is required at both the front and rear wire rope entry points of the detection device. Specifically, a front sealing device 3 and a rear sealing device 4 are respectively installed at both axial ends of the wire rope non-destructive ultrasonic testing device to prevent leakage of the coupling medium. In one embodiment, both the front and rear sealing devices are louvered sealing rings.

[0064] The coupling medium supply device sprays the coupling medium onto the surface of the steel wire rope under test. The coupling medium needs to be evenly coated on the surface of the steel wire rope, while also preventing leakage. Therefore, as one implementation, a connecting sleeve 25 is provided between the end of the annular water curtain generator and the flexible inner airbag. This connecting sleeve is a cylindrical structure made of elastic material and closed on all sides. The end that connects to the flexible inner airbag is fixed to the inner circumferential surface of the central through hole of the fixing base 13. A variable diameter constraint mechanism 26 is provided inside the connecting sleeve 25. This variable diameter constraint mechanism is configured to adapt to steel wire ropes of different diameters, and also guides and constrains the coupling medium, so that it better coats the surface of the steel wire rope.

[0065] In some embodiments, the variable diameter constraint mechanism includes a louvered variable diameter tube 26a through which the steel wire rope passes. This louvered variable diameter tube consists of several louvers connected in a circumferentially adjustable manner. The section facing the annular water curtain generator is a flared opening, forming a flow guide / guide section, while the section facing the flexible inner airbag is a cylindrical structure, forming a constraint section. The flared opening's variable diameter design, on the one hand, better guides and constrains the coupling medium to the surface of the steel wire rope. The coupling medium is sprayed onto the inner circumferential surface of the flow guide / guide section, and under its guiding action, it converges to the surface of the steel wire rope, uniformly coating the surface within the constraint section. On the other hand, it also centers and guides the steel wire rope as it enters the detection channel of the flexible inner airbag, allowing the steel wire rope to enter the central channel of the flexible inner airbag more accurately.

[0066] In some embodiments, a support sleeve 26b is also provided on the outer side of the louvered reducer. This support sleeve is set tightly against the inner wall of the connecting sleeve 25, and a force transmission mechanism 26c is provided between the support sleeve 26b and the louvered reducer 26. This diameter-reducing constraint mechanism refers to the fact that the diameter of the constraint section of the louvered reducer can adaptively change with the size of the wire rope when wire ropes of different diameters pass through, and also refers to the fact that the louvered reducer itself is configured to reduce diameter along the axial direction.

[0067] In some embodiments, arc-shaped protrusions 26e are evenly distributed on the inner circumference of the outlet port of the louvered reducer 26a constraint section. These protrusions abut against the surface of the wire rope as it passes through, thus reducing the contact area between the wire rope and the reducer. Simultaneously, under the constraint of the reducer constraint mechanism 26, the arc-shaped protrusions remain in contact with the wire rope throughout its passage. When the diameter of the wire rope changes, force is transmitted through these arc-shaped protrusions, causing the diameter of the louvered reducer constraint section to adapt adaptively.

[0068] To better guide the coupling medium sprayed by the water curtain generator to the surface of the wire rope and prevent leakage, a connecting cylinder 26d is also provided between the louvered reducer 26a and the water curtain generator. The connecting cylinder is circumferentially closed, with one end axially sealed and fixedly connected to the outer circumference of the water curtain generator, and the other end fixedly connected to the flared end of the louvered reducer. There is an overlapping section between the end connected to the louvered reducer and the connecting sleeve 25 to prevent the medium from spraying outward. Together, the connecting cylinder 26d and the connecting sleeve 25 form a closed space between the water curtain generator and the flexible inner airbag to prevent the coupling medium from leaking.

[0069] The entire variable diameter constraint mechanism 26 is fixed to the fixed base 13 by a bracket 27, the structure of which is described in [reference needed]. Figure 3 The bracket's legs are fixed to the fixed base, and the other end is supported on the outer circumference of the connecting cylinder 26d.

[0070] Typically, water is used as the coupling medium, forming an internal circulation throughout the detection device. In some embodiments, a gas-liquid two-phase coupling medium can also be used. In scenarios requiring a gas-liquid two-phase coupling medium, a nanobubble generator is added to the circulating water tank to generate nanobubbles and mix them into the coupling medium, forming a gas-liquid two-phase coupling medium. The generation of nanobubbles is preferably achieved using chemical methods; for example, a carbon dioxide generator can be placed in the circulating water tank.

[0071] Gas-liquid two-phase coupling media have better effects than water alone as a coupling medium: 1) reducing the density of water; 2) driving the membrane faster; 3) reducing the amount of water used; 4) pure water flow can easily wash away surface substances such as rust, affecting the detection results, while gas-liquid two-phase is gentler.

[0072] Generally, air bubbles in the coupling medium can negatively impact the accuracy of ultrasonic transmission and feedback. However, the gas-liquid two-phase coupling medium of this application has several advantages. First, its bubbles are nanobubbles of uniform size, with very small reflection and diffraction, thus having a limited impact on the ultrasonic detection results. Second, the two-phase coupling medium is ejected at high speed through a water curtain generator and moves axially under the guidance and constraint of a variable diameter constraint mechanism. The movement trajectory is relatively stable, which can also reduce the impact of air bubbles on ultrasonic detection. Ultimately, its impact on ultrasonic detection is negligible.

[0073] Both the coupling medium supply section and the ultrasonic detection section are encapsulated within the outer casing 6. The axial end face of the outer casing has through holes for the steel wire rope to pass through. The front and rear louvered sealing rings are fixedly installed at the corresponding through holes. The front louvered sealing ring is fixedly connected to the axial end face of the annular water curtain generator and abuts against the inner wall of the outer casing, thus also fixing the axial position of the fixed seat. The rear louvered sealing ring is fixedly connected to the circulating water collection ring and has a small axial gap reserved between it and the outer casing to accommodate the slight displacement of the fixed seat axially pushed by the inner airbag at the second pressure value. The passive guide wheel assembly 7 is located at the tail of the detection device and fixed to the movable seat 14, abutting against the steel wire rope when it passes through. The integrated controller 5, which controls the operating mechanisms of the air pump, water pump, etc., is also mounted on the outer surface of the movable seat.

[0074] The work process is as follows:

[0075] The steel wire rope enters the detection device from the front louvered sealing ring, passing sequentially through the water curtain generator, the diameter-changing constraint mechanism, the flexible inner airbag, the circulating water collection ring, and the rear louvered sealing ring. When the steel wire rope passes through the rear louvered sealing ring (i.e., when the steel wire rope fills the entire detection chamber), the integrated controller 5 controls the water pump and air pump to start. The water pump starts, spraying coupling medium into the steel wire rope. The water flows axially forward along the running direction of the steel wire rope. When it passes through the detection chamber inside the flexible inner airbag, the ultrasonic probe collects the echo information of the steel wire rope. The echo information is collected in the integrated controller for data processing, converting the ultrasonic information into defect information. The water flow is finally collected by the collection ring at the tail and returns to the water tank through the pipeline.

[0076] When a defect is detected and needs to be relocated, the wire rope pauses and continues to inflate the inner and outer airbags. The expansion of the inner airbag generates a small axial displacement along the direction of the wire rope's movement, which pushes the movable seat to move slightly in the direction of the wire rope's travel. The outer airbag plays an auxiliary role, which in turn drives the ultrasonic probe to move slightly in the direction of the wire rope's travel, and its detection range once again covers the defect location.

[0077] The non-destructive ultrasonic testing device for steel wire rope provided by this invention features a flexibly fixed ultrasonic probe with an adjustable channel size for the steel wire rope to pass through, which can adapt to the testing of steel wire ropes of different diameters. At the same time, the testing device is suitable for dynamic detection of steel wire rope defects, and during the testing process, the device can quickly locate the defect position through its own adaptive adjustment.

[0078] The above description only illustrates preferred embodiments of the present invention and should not be construed as limiting the scope of the claims. Any equivalent procedural modifications made using this specification are included within the patent protection scope of this invention.

Claims

1. A non-destructive ultrasonic testing device for steel wire ropes, characterized in that: The ultrasonic testing module includes: The first flexible pressure chamber is cylindrical, with a channel formed at its center for the steel wire rope to pass through; At least one ultrasonic probe is fixed to the side wall of the first flexible pressure chamber; The fixed seat remains relatively fixed to one end of the first flexible pressure chamber; The movable seat is connected to the other end of the first flexible pressure chamber and can move axially relative to the fixed seat; The first flexible pressure chamber is configured such that, during wire rope testing, its internal pressure is increased to a first pressure value, causing it to expand radially to accommodate the diameter of the wire rope; when the ultrasonic probe needs to be moved axially along the wire rope, its internal pressure is increased to a second pressure value higher than the first pressure value, causing it to produce additional axial elongation, thereby pushing the movable seat away from the fixed seat to drive the ultrasonic probe to perform axial position fine adjustment.

2. The non-destructive ultrasonic testing device for steel wire ropes according to claim 1, characterized in that: An axially retractable connecting mechanism is provided between the fixed seat and the movable seat.

3. The non-destructive ultrasonic testing device for steel wire ropes according to claim 2, characterized in that: The connecting mechanism is a rocker mechanism, with its two ends hinged to the fixed seat and the movable seat, respectively.

4. The non-destructive ultrasonic testing device for steel wire ropes according to claim 2 or 3, characterized in that: It also includes a second flexible pressure cavity coaxially arranged with the first flexible pressure cavity. The second flexible pressure cavity is located outside the connecting mechanism, and its two ends are respectively connected to the fixed seat and the movable seat.

5. The non-destructive ultrasonic testing device for steel wire ropes according to claim 2, characterized in that: The ultrasonic probes are multiple and arranged circumferentially along the sidewall of the first flexible pressure cavity.

6. The non-destructive ultrasonic testing device for steel wire ropes according to claim 1, characterized in that: It also includes a coupling medium providing system, the system comprising: Coupled medium storage device; A pumping device, the inlet of which is connected to the coupling medium storage device; A coupling medium supply device, which is connected to the outlet of the pumping device via a pipe, is used to supply a coupling medium to the surface of the wire rope.

7. The non-destructive ultrasonic testing device for steel wire ropes according to claim 6, characterized in that: The coupling medium storage device is equipped with a nanobubble generating mechanism to generate nanobubbles and mix them into the coupling medium to form a gas-liquid two-phase coupling medium.

8. The non-destructive ultrasonic testing device for steel wire ropes according to claim 6, characterized in that: The coupling medium providing device is an annular spray head with multiple spray holes on its inner ring wall.

9. The non-destructive ultrasonic testing device for steel wire ropes according to claim 6 or 7, characterized in that: A connecting sleeve is provided between the coupling medium providing device and the end of the first flexible pressure chamber; the connecting sleeve is a cylindrical structure made of elastic material, and a radially adjustable variable diameter constraint mechanism is provided inside it, which is configured to adapt to steel wire ropes of different diameters.

10. The non-destructive ultrasonic testing device for steel wire ropes according to claim 9, characterized in that: It also includes a coupling medium collection device, which is disposed on the movable seat and is used to collect the coupling medium intercepted from the surface of the wire rope, and is connected to the coupling medium storage device to realize the recycling of the coupling medium; It also includes a front sealing device and a rear sealing device disposed at both ends of the axial direction of the wire rope non-destructive ultrasonic testing device to prevent leakage of the coupling medium.

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