Steel wire rope damage detection device and control method thereof

Abstract

The invention belongs to the technical field of flaw detection of steel wire ropes of mine hoists, and particularly relates to a steel wire rope damage detection device and a control method thereof.The steel wire rope damage detection device comprises a tester shell, a center hole for a steel wire rope to penetrate through is formed in the tester shell in the axial direction, and the two ends of the tester shell are each provided with a roller retaining mechanism; the roller holding mechanism is formed by arranging a plurality of roller holding assemblies around the central hole, each roller holding assembly comprises a roller holding arm and a mounting base, and the mounting base is fixed at the end part of the tester shell; the head end of the roller retaining arm is rotatably connected to the mounting base, a roller is arranged at the tail end of the roller retaining arm, and the roller retaining arm is further connected with the mounting base through an elastic part I. A self-locking mechanism is further arranged on the roller retaining arm. And the locking device is used for switching the roller retaining arm between a locking state and a floating state. The scheme is suitable for detecting steel wire ropes with different diameters, and the safety performance and the working efficiency can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of flaw detection of mine hoist wire ropes, and particularly relates to a wire rope damage detection device and a control method thereof. Background Art

[0002] A wire rope nondestructive testing instrument (equipment) is an instrument (equipment) used for nondestructive inspection of in-service wire ropes. It is used in mine hoists, cranes, elevators, lifts, aerial ropeways, bridges, and other fields. This instrument (equipment) can inspect iron-based wire ropes with circular cross-sections. Wire rope nondestructive testing primarily involves two parameters: LMA (loss of metal cross-sectional area) and LF (localized damage to the wire rope). This instrument (equipment) utilizes the principles of permanent magnetism and magnetic flux leakage. During testing, a permanent magnet excites the wire rope, magnetizing it under the influence of an external magnetic field. Wire breakage, wear, corrosion, and other factors in the wire rope cause changes in magnetic flux or magnetic flux leakage, which are captured by a Hall effect sensor and converted into electrical signals, outputting an analog signal.

[0003] In the prior art, the following major problems exist when testing mine wire ropes using wire rope damage detection devices: On the one hand, the existing mine wire rope detection devices cannot stably maintain the wire rope in the center of the detection device during testing, resulting in reduced detection accuracy during the testing process. The wire rope cannot be ensured to pass concentrically through the detection device, resulting in severe wear of the wire rope and the device bushing, which may affect test results and even damage the detection device and sensor. On the other hand, when testing mine wire ropes, only a single detection device can usually be used, and the device is difficult to fix during partial testing, resulting in low detection efficiency and affected detection accuracy. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and provide a wire rope damage detection device and a control method thereof. Through structural improvement and optimization, the device can keep the wire rope in a stable state at all times during the detection process, avoiding damage caused by collision between the detection equipment and the wire rope during the inspection process. At the same time, it can support simultaneous detection of multiple detection devices (tester) and ensure the detection accuracy of the entire detection process. This solution can be applied to the detection of wire ropes of different diameters, thereby improving safety performance and work efficiency.

[0005] One of the purposes of the present invention is to provide a wire rope damage detection device, comprising a tester housing, wherein the tester housing is formed with a center hole for the wire rope to pass through in the axial direction, and roller holding mechanisms are respectively provided at both ends of the tester housing, wherein the roller holding mechanism is composed of a plurality of roller holding assemblies arranged around the center hole, and the roller holding assembly includes a roller holding arm and a mounting base, and the mounting base is fixed to the end of the tester housing; the head end of the roller holding arm is rotatably connected to the mounting base, and the tail end of the roller holding arm is rotatably provided with a roller, and the roller holding arm is also connected to the mounting base via an elastic member I. The roller holding arm can move between an open position and at least one retracted position. In the open position, the roller holding arm can be switched to a locked state relative to the tester housing, and in the retracted position, the roller holding arm is in a floating state relative to the tester housing, which is used to continuously press the roller wheel surface at the end of the roller holding arm against the surface of the wire rope to be tested, so that the tester housing can achieve adaptive center positioning relative to the wire rope during the test; a self-locking mechanism is also provided on the roller holding arm, which is used to switch the roller holding arm between the locked state and the floating state in the open position.

[0006] As a preferred solution, the roller holding mechanism includes at least two groups of roller holding components, the roller holding components are centrally symmetrical and evenly distributed around the center hole, and the roller holding components at both ends of the tester housing are staggered.

[0007] As a preferred embodiment, the tester shell includes half shell I and half shell II, a bushing is arranged in the center hole, and the bushing includes bushing I and bushing II; bushing I is fixedly arranged in half shell I, and bushing II is fixedly arranged in half shell II, and annular protrusions for installing sensors are arranged in the middle sections of half shell I and half shell II, and annular grooves for cooperating with the annular protrusions are arranged on the opposite sides of bushing I and bushing II.

[0008] As a preferred embodiment, the self-locking mechanism includes a ratchet and a pawl, wherein the ratchet is fixedly arranged at the head end of the roller retaining arm, the connecting end of the pawl is rotatably connected to the mounting base, and the pawl can move between a locked position and at least one unlocked position, in which the free end of the pawl abuts against the outer teeth of the ratchet, and in the unlocked position, the free end of the pawl is disengaged from the outer teeth of the ratchet.

[0009] As a preferred solution, the self-locking mechanism includes a locking block and an elastic member II, and the locking block and the elastic member II are respectively located on both sides of the pawl; The locking block is rotatably arranged on the tester housing, one end of the elastic member II abuts against the side surface of the pawl, and the other end is fixed to the mounting base; The locking block is rotated to a first position, the distal end unlocking position of the locking block is in abutment with the pawl, the elastic element II is compressed, the pawl is disengaged from the ratchet and is in an unlocked state, the locking block is rotated to a second position, the proximal end locking position of the locking block is in contact with the pawl, the elastic element II pushes the pawl into contact with the ratchet outer teeth and is in a locked state.

[0010] As a preferred scheme, a buckle is further arranged on the tester housing; the buckle comprises buckle I and buckle II, the half shell I is provided with buckle I, the half shell II is provided with buckle II, and the buckle I and the buckle II can be buckled or unlocked with each other to buckle the half shell I and the half shell II into a sleeve structure or separate and open.

[0011] As a preferred scheme, a side box is arranged on the side wall of the tester housing, and the side boxes on different tester housings are connected into an integrated whole by a floating fixing belt.

[0012] As a preferred scheme, a side wall roller is arranged on the inner side wall of the side box, the floating fixing belt comprises a movable chain formed by a fixed sheet I movably connected through a pin shaft, and connecting hanging rings for connecting with a fixed rope are arranged at both ends of the movable chain; the wheel surfaces of the side wall rollers are respectively in contact with both sides of the wide side and both sides of the narrow side of the floating fixing belt.

[0013] As a preferred scheme, a fixing seat is further included, and a hanging piece is rotatably arranged on the fixing seat and detachably connected with the side box.

[0014] The second object of the present application is to provide a control method of a steel wire rope damage detection device, the tester housing is axially formed with a central hole for the steel wire rope to pass through, and roller retaining mechanisms are further arranged at both ends of the tester housing, respectively; the roller retaining mechanisms are formed by a plurality of roller retaining assemblies arranged around the central hole, the roller retaining assembly comprises a roller retaining arm and a mounting base, and the mounting base is fixed to the end portion of the tester housing; the head end of the roller retaining arm is rotatably connected to the mounting base, the tail end of the roller retaining arm is rotatably provided with a roller, and the roller retaining arm is further connected with the mounting base through an elastic element I, The method comprises, At least one self-locking mechanism is arranged on the roller retaining arm, for enabling the roller retaining arm to be switched between a locked state and a floating state; The roller retaining arm can be moved between an unfolded position and at least one folded position, the roller retaining arm is switched to the locked state by the self-locking mechanism when the roller retaining arm is rotated to the unfolded position, for installation and dismounting of the detection device; The roller holding arm can be switched to a floating state through a self-locking mechanism, and the roller wheel surface at the end of the roller holding arm can simultaneously and continuously contact and compress the wire rope. The detection device can achieve adaptive centering adjustment relative to the wire rope during the test.

[0015] Beneficial effects According to the present invention, the roller retaining arm can be switched between a locked state and a floating state. This solution is improved by locking the roller retaining arm with a self-locking mechanism. When the roller retaining arm is rotated to the open position and switched to the locked state, the end roller of the roller retaining arm can maintain a fixed position without contacting the wire rope, thereby reducing the difficulty of operation during installation and removal of the tester housing. This solution can switch the roller retaining arm to a locked state before installation or unlocking by providing a self-locking mechanism. This will reduce the difficulty of snapping together the half shells and prevent safety hazards caused by the unlocking process. When the roller retaining arm is switched to the floating state, the end roller of the roller retaining arm can maintain close contact with the wire rope. Multiple roller retaining arms symmetrically arranged along the center press the wire rope from different sides, thereby enabling adaptive centering adjustment of the tester housing during the detection process. (It should be noted that in the relevant prior art, when multiple roller retaining arms are arranged around the tester shell at different angles, when the two side half shells of the tester shell need to be buckled together, it is necessary not only to overcome the repulsive force of the magnetic force of the permanent magnet installed in the tester shell, but also to overcome the tension of the tension spring of each roller retaining arm. This makes it extremely difficult for the operator to buckle the two side half shells. Assuming that three roller retaining arms are arranged at each end as an example, when the detection device needs to be installed, if the two side half shells are directly buckled together, it is necessary to overcome the repulsive force of the magnetic force and the axial component of the tension of the six springs along the detection device at the same time, and the required buckling force is huge; when the tester shell needs to be disassembled, if the two side half shells are directly unlocked by pressing the button, the combined effect of the repulsive force of the magnetic force and the tension of the six springs may cause the two half shells to bounce open quickly, and improper operation may easily injure the operator. Therefore, there are certain safety hazards during the operation). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 The structure of the wire rope detection device of the present invention is Figure 1 ; Figure 2 The structure of the wire rope detection device of the present invention is Figure 2 ; Figure 3 The structure of the wire rope detection device of the present invention is Figure 3 ; Figure 4 The structure of the floating fixed belt of the present invention is connected in series with multiple wire rope detection devices Figure 1 ; Figure 5 The structure of the floating fixed belt of the present invention is connected in series with multiple wire rope detection devices Figure 2 ; Figure 6 A perspective view of a floating fixed belt connected in series with multiple wire rope detection devices according to the present invention; Figure 7 The structure of the roller holding assembly in the present invention Figure 1 ; Figure 8 The structure of the roller holding assembly in the present invention Figure 2 ; Figure 9 for Figure 8 A partial enlarged view of the Figure 10 This is a structural diagram of the tester housing in the present invention; Figure 11 It is a structural diagram of half shell I or half shell II in the present invention; Figure 12 for Figure 11 Cross-sectional view along the middle line AA; Figure 13 for Figure 12 A partial enlarged view of point A in the middle; Figure 14 This is the structural diagram of the tester after removing one half of the shell; Figure 15 This is a structural diagram of the buckle in the present invention; Figure 16 for Figure 15 Cross-sectional view along the middle line AA; Figure 17 This is a structural diagram of the floating fixed belt; Figure 18 This is the structural diagram of the wire rope detection device: with a fixed seat; Figure 19 This is a structural diagram of the fixed seat; Markings in the figure: 1. Tester housing, 11. Half shell I, 12. Half shell II, 13. Hinge, 14. Annular protrusion, 16. Sensor mounting slot, 17. Center hole; 2. Roller holding assembly, 21. Roller holding arm, 22. Roller, 23. Elastic member I, 24. Self-locking mechanism, 241. Ratchet, 242. Pawl, 243. Locking head, 2431. Locking block, 2432. Proximal locking position, 2433. Distal unlocking position, 244. Elastic member II, 245. Knob, 25. Mounting base, 251. Ratchet cavity, 252. Pawl cavity; 3. Buckle, 31. Buckle I, 311. Mounting seat, 312. Elastic clamp, 313. Spring member, 314. Barbed clamp, 315. Button, 316. Engaging slope, 317. Guide post, 32. Buckle II, 321. Slot, 322. Hook slot; 4. Connecting side box, 41. Side box I, 42. Side box II, 43. Side wall roller, 431. Outer side clamping wheel, 432. Inner side clamping wheel, 433. Upper side clamping wheel, 434. Lower side clamping wheel; 5. Floating fixing belt, 51. Fixing plate I, 52. Fixing plate II, 53. Pin, 54. Connecting ring, 55. Wide side, 56. Narrow side, 57. Connecting block, 58. Connecting groove; 6. Bushing, 61. Bushing I, 62. Bushing II, 63. Annular groove; 7. Fixed seat, 71. Pendant, 711. Inner plate, 712. Outer plate, 713. Clamping gap, 714. Stop rod, 72. Cross brace, 73. Stand, 731. Slot, 74. Rotating joint, 741. Rotating shell, 742. Rotating ball; 8. Sensor; 9. Tester; 10. Wire rope. DETAILED DESCRIPTION

[0018] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0019] It should be noted that: unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons having ordinary skills in the field to which the invention belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present invention do not express a quantitative limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, but do not exclude other elements or objects with the same function.

[0020] Example 1 As shown in the figure, the embodiment provides a steel wire rope damage detection device, which comprises a tester shell 1, the tester shell 1 is formed with a central hole 17 for threading a steel wire rope 10 along the central axis direction, and the tester shell 1 is provided with a roller holding mechanism at both ends, the roller holding mechanism in the scheme comprises a plurality of roller holding assemblies 2 arranged around the central hole, the roller holding assembly 2 comprises a roller holding arm 21 and a roller 22 at the end of the roller holding arm 21, the roller 22 is rotatably arranged on the roller holding arm 21, the roller holding arm 21 comprises two arm plates arranged in parallel and located on both sides of the roller 22, the roller face of the roller 22 is used to continuously press the surface of the steel wire rope 10 during the test to realize rolling contact, the head end of the roller holding arm 21 is rotatably connected with the tester shell 1, and the position close to the end of the roller holding arm 21 is also connected with the tester shell 1 through an elastic element I 23, and the elastic element I 23 is preferably a spring, since the rollers 22 at the ends of the roller holding arms 21 at different angles can all contact the surface of the steel wire rope 10, all the elastic elements I 23 apply pressure to the surface of the steel wire rope 10 through the roller holding arms 21 and the rollers 22, so that the rollers 22 can be in close contact with the surface of the steel wire rope 10, each roller 22 is connected with a distance measuring sensor, which is used to detect the length of the steel wire rope 10 passing through the roller 22 during the test, so as to locate the defect position of the steel wire rope 10, and the scheme can reduce the distance measuring error by taking the average value of the values detected by the six distance measuring sensors, and the defect position can be located more accurately by taking the average value of the distance measuring sensors when there is a defect on the steel wire rope 10.

[0021] In this embodiment, the tester housing 1 is a hollow cylindrical sleeve structure. The tester housing 1 includes a half shell I11 and a half shell II12, and one side of the two half shells is movably connected by a hinge 13. The opening and closing side of the two half shells is fastened or unlocked by a buckle 3. The buckle 3 is fixed at the closed position of the half shell I11 and the half shell II12 to lock the two half shell structures. The structure of one embodiment of the buckle 3 of the present invention is as follows: the buckle 3 includes a buckle I31 and a buckle II32, and a buckle is provided on the half shell I11. Ⅰ31, a buckle Ⅱ32 is provided on the half shell Ⅱ12, and the buckle Ⅰ31 includes a mounting seat 311, an elastic clip 312 and a spring member 313. The buckle Ⅱ32 is provided with a slot 321, and the end of the slot 321 is set as a hook slot 322. The elastic clip 312 is provided with a barb clip 314 that cooperates with the hook slot 322. The elastic clip 312 and the spring member 313 are arranged in the internal cavity of the mounting seat 311. One end of the spring member 313 contacts the inner wall of the mounting seat 311 cavity, and the other end contacts the elastic clip 313. The elastic card 312 is in contact with the tester. A guide column 317 is provided on the elastic card 312 along the axial direction of the tester. A spring member 313 is passed through the guide column 317. The guide column 317 is located in the internal cavity of the mounting seat 311. The elastic card 312 is also provided with a button 315. The button 315 can be exposed outward from the through hole on the side wall of the cavity of the mounting seat 311 under the action of the spring member 313. By pressing the button 315, the elastic card 312 moves along the axial direction of the spring member 313, and the spring member 313 is compressed, and the barb card The head 314 is separated from the hook groove 322, and the two half shells are ejected under the action of the repulsive force of the permanent magnet and the elastic member Ⅰ23. When fastening, the two half shells are pressed together, and the buckle Ⅰ31 and the buckle Ⅱ32 can be fastened. In order to facilitate automatic fastening, the fastening end of the hook head 314 is also provided with a fastening inclined surface 316, so as to facilitate guiding the hook head 314 into the hook groove 322 inside the slot 321. Under the pressing action of the spring member 313, the hook head 314 is pressed into the hook groove 322.

[0022] In a typical embodiment of the present invention, the roller 22 is pressed against the surface of the wire rope 10 during the test process. Therefore, under normal testing conditions, there is tension in the elastic member I 23, and permanent magnets are provided in the two half-shells, which generate a certain repulsive force. Therefore, when the tester 9 is installed and fastened, it is necessary to overcome the repulsive force between the two half-shells and the tension of the elastic member I 23. For example, if three sets of roller retaining assemblies 2 are provided on each side, it is necessary to overcome the tension of six springs and the repulsive force between the half-shells at the same time. As a result, the tester 9 needs to overcome greater resistance when fastening, which increases the operator's labor intensity and makes fastening inconvenient. Moreover, when unlocking, if the repulsive force and the spring tension act together, unlocking by pressing the button 315 may cause a large spring force, forming an operational safety hazard, thereby bringing uncontrollable operational risks. On this basis, a self-locking mechanism 24 is provided on the roller retaining arm 21 of the present invention, and the self-locking mechanism 24 can keep the roller retaining arm 21 movable between an open position and at least one retracted position. In the open position, the self-locking mechanism 24 can lock the roller retaining arm 21 at a specific angle, and the angle of the roller retaining arm 21 relative to the tester housing 1 is in a locked state. At this time, after the two half shells are buckled together, the wheel surfaces of all rollers 22 can remain disengaged from the wire rope 10. In the stowed position, the roller holding arm 21 is in a floating state relative to the tester housing 1, so that the wheel surface of the roller 22 at the end of the roller holding arm 211 can simultaneously contact and compress the wire rope 10 under the tension of the elastic member Ⅰ 23, and the tester housing 1 can achieve adaptive centering relative to the wire rope 10 during the test (it should be noted that the stowed position here is because the roller holding arm 21 has a tendency to shrink inward when it is pulled by the elastic member Ⅰ 23, so that the wire rope 10 can be retracted inward and compressed. In this solution, the position state of the roller holding arm 21 shrinking inward from the open position is called the stowed position). Through the above improvements, the tester 9 only needs to overcome the repulsive force between the two half shells when it is installed and buckled, so the operation is more labor-saving. When unlocking, since the ranging holding arm 21 is fixed, and the wheel surface of the roller 21 does not contact the wire rope 10, there is only a repulsive force between the two half shells. When the buckle 3 is unfastened, the operator will not be injured due to excessive elastic force, which effectively prevents the occurrence of such safety hazards.

[0023] In one embodiment of the present invention, the roller holding components 2 at both ends of the tester housing 1 are respectively set as 3 groups for illustration, the roller holding components 2 on each side are evenly distributed, and the roller holding components 2 at both ends are staggered, so that Figure 3 As shown in the perspective, the angles between each roller holding arm 21 of the roller holding assembly 2 at both ends are equal to 60° (as shown in FIG. Figure 3 The angles between the roller holding arms 21 of the roller holding assembly 2 at one end are both 120° (as shown in FIG. Figure 3 (As shown by the angle A, shown below), this solution clamps the wire rope 10 at six different circumferential positions of the tester housing 1, enabling adaptive centering of the tester housing 1 relative to the wire rope 10. This design maintains the wire rope 10 in a stable state during testing, preventing it from rubbing against the bushing 6 and improving detection accuracy. By maintaining the coaxiality between the wire rope 10 and the tester 9, this detection device can be used to detect wire ropes 10 of varying diameters, improving detection accuracy.

[0024] Furthermore, this solution utilizes a staggered arrangement of roller retaining arms 21 and rollers 22 at both ends. This design serves another purpose: in addition to applying force from six different directions, the staggered arrangement also serves another purpose. Considering the presence of impurities such as oil lumps on the wire rope 10, if the rollers 22 at both ends are positioned in a positively aligned arrangement, and if there are large oil lumps on the surface of the wire rope 10, the tester housing 1 may deviate toward the same side as the wire rope 10 continues to move, ultimately leading to large detection errors. This solution utilizes this staggered arrangement. Even if there are oil lumps on the wire rope 10, the tester housing 1 can quickly return to center after passing over roller 22 at one end, thereby achieving the fastest adaptive centering adjustment. The staggered arrangement of the rollers 22 at the other end makes them less susceptible to interference from the oil lumps. This arrangement also prevents wear of the wire rope 10 and the interior of the tester housing 1 (e.g., the bushing) caused by eccentricity of the tester housing 1.

[0025] In this embodiment, to further protect the tester housing 1, a bushing 6 is provided inside the center hole of the tester housing 1. The bushing 6 also adopts a two-half-shell structure. Bushing I 61 and bushing II 62 are respectively fixed inside the half shells of the tester housing 1. Specifically, an annular protrusion 14 is provided along the circumferential direction in the middle of the inner arc surface of the half shell I 11 and the half shell II 12. The annular protrusion 14 is provided with a sensor mounting groove 16 for mounting the sensor 8, which is a Hall sensor. The outer arc surface of bushing I 61 and bushing II 62 is respectively provided with an arc groove 63. The arc groove 63 is structurally adapted to be connected with the annular protrusion 14 and simultaneously serves as an axial limit for the bushing I 61 and bushing II 62 at both ends. The bushing 6 can prevent the sensor 8 from being damaged by unexpected situations during the detection of the wire rope 10. The wire rope 10 is in a stable state during the test and does not scratch the bushing 6. This solution is suitable for the detection of wire ropes 10 of different diameters to improve the detection accuracy. The wire ropes 10 used as the applicable detection objects in this solution have various models and sizes.

[0026] The structure of the self-locking mechanism 24 is described below. The self-locking mechanism 24 includes a locking head 243, an elastic member II 244, a ratchet 241 arranged at the head end of the roller retaining arm 21, and a pawl 242 cooperating with the ratchet 241, wherein one end of the pawl 242 is rotatably arranged on the mounting base 25, the ratchet 241 is fixedly connected to the roller retaining arm 21, and the pawl 242 can move between a locked position and at least one unlocked position. When the pawl 242 rotates to a position in contact with the outer teeth of the ratchet 241, the roller retaining arm 21 can be locked to prevent the roller retaining arm 21 from rotating, so that the roller retaining arm 21 is in a fixed state (locked state) in the open position. When the pawl 242 rotates to the unlocked position, the pawl 242 disengages from the outer teeth of the ratchet 241. At this time, the roller retaining arm 21 is in a floating state. If the end roller 22 of the roller retaining arm 21 contacts the surface of the wire rope 10 at this time, it can automatically adapt to the centering adjustment. The locking head 243 is mounted on the mounting base 25 of the tester housing 1. The mounting base 25 is fixed at the end of the tester housing 1. The internal cavity of the mounting base 25 includes a ratchet cavity 251 and a pawl cavity 252 that are connected. The ratchet 241 is rotatably arranged in the ratchet cavity 251. The locking head 243 is rotatably mounted in the shaft hole of the mounting base 25. The locking head 243 includes a rotating shaft, a locking block 2431 located at the first end of the rotating shaft and a knob 245 located at the second end of the rotating shaft. The locking block 2431, the pawl 242 and the elastic member II 244 are located inside the pawl cavity 252. The locking block 2431 and the elastic member II 244 are respectively located at the two ends of the pawl 242. On the rotation direction side, the locking block 2431 and the elastic member II 244 are in direct contact with the pawl 242 respectively, and the other end of the elastic member II 224 is fixed to the inner wall of the cavity of the mounting base 25. The locking block 2431 has two rotation positions as shown in the figure. In the first rotation position, the proximal locking position 2432 of the locking block 2431 is in contact with one side of the pawl 242, and the two are in a parallel state. At this time, the distance between the pawl 242 and the center of the rotating shaft of the locking block 2431 is the shortest. After the pawl 242 rotates to this position, the end of the pawl 242 abuts against the outer teeth of the ratchet 241 to prevent the ratchet 241 from rotating, thereby realizing the overall locking of the position and angle of the roller holding arm 21. In the second rotation position, the locking block 2431 rotates 90°, and the distal unlocking position 2433 of the locking block 2431 contacts one side of the pawl 242. The other side of the pawl 242 compresses the elastic part II 244, and the elastic part II 244 shortens, and the pawl 242 is pressed against the locking block 2431 through its elastic force. The pawl 242 and the locking block 2431 are in a vertical state. At this time, the distance between the pawl 242 and the center of the rotating shaft of the locking block 2431 is the farthest. After the pawl 242 rotates to this position, the end of the pawl 242 is disengaged from the ratchet 241, thereby releasing the lock on the ratchet 241. At this time, the roller retaining arm 21 is in a floating state.The self-locking mechanism 24 can facilitate installation before testing and quick removal after testing, reduce operational difficulty, and improve operational safety.

[0027] As shown in the figure, a connecting side box 4 is provided on the side wall of the tester housing 1. The connecting side boxes 4 of different tester housings 1 are connected as a whole by passing through a floating fixing belt 5. Side wall rollers 43 are respectively provided on the inner wall side of the connecting side box 4. The side wall rollers 43 specifically include an outer side clamping wheel 431, an inner side clamping wheel 432, an upper side clamping wheel 433, and a lower side clamping wheel 434 on four sides. The outer side clamping wheel 431, the inner side clamping wheel 432, the upper side clamping wheel 433, and the lower side clamping wheel 434 are respectively in contact with the four sides of the floating fixing belt 5, thereby connecting multiple testers 9 through the floating fixing belt 5 and maintaining the relative positions between the testers 9. Alternatively, the connecting side box 4 is installed on the hanger 71 of the fixing seat 7 to achieve the support and fixation effect of the tester 9, thereby realizing the detection of a single wire rope 10 by a single tester 9.

[0028] Example 2 This solution is further improved on the basis of Example 1. In order to improve the working efficiency of the device, multiple single testers 9 are connected as one through a floating connection mechanism. For example, two or more groups of testers 9 are connected together through a floating fixing belt 5, which can realize the synchronous detection of multiple strands of wire ropes 10 during the detection process. After connecting multiple groups of testers 9 through the floating fixing belt 5, the multiple groups of testers 9 can be automatically aligned with different wire ropes 10. According to the number of wire ropes 10, the same number of wire rope damage testers 9 can be installed on the wire ropes 10, which can not only improve the safety performance but also improve the work efficiency. (For example, in the prior art, when inspecting the steel wire rope 10 of a floor-standing hoist, the tester 9 needs to be fixed by a fixed rope. The tying of the fixed rope requires finding a relatively suitable fixed point, and the fixed installation of the tester 9 is relatively difficult. Since the steel wire rope 10 has multiple strands in parallel, when inspecting the steel wire rope 10 located in the middle position, the fixed rope of the tester 9 on the steel wire rope 10 may easily interfere with the steel wire rope 10 located at the edge). However, by setting a floating fixed belt 5, the multiple groups of testers 9 of this solution only need four fixed hanging points at the corners to fix the multiple groups of testers 9 when inspecting multiple strands of steel wire ropes 10 at the same time. The requirement for the number of fixed points is greatly reduced, thereby reducing the difficulty of fixing the multiple groups of testers 9.

[0029] The following describes the specific structure of the floating fixed belt 5. The floating fixed belt 5 includes fixed plates I 51 arranged in series. Adjacent fixed plates I 51 are movably connected by a pin 53 to form a chain. Fixed plates II 52 are provided at both ends of the chain. Connecting blocks 57 and connecting grooves 58 are provided on both sides of fixed plate I 51 and on one side of fixed plate II 52. The connecting blocks 57 and connecting grooves 58 between adjacent fixed plates I 51 and between adjacent fixed plates I 51 and fixed plates II 52 are adapted to be connected. Specifically, the pin 53 passes through the pin holes of the connecting holes 57 and connecting grooves 58. The connecting blocks 57 are located in the connecting grooves 58 and can rotate relative to the connecting grooves 58. The floating fixing belt 5 passes through the connecting side box 4 on the side wall of the tester housing 1 and contacts the side wall rollers 43 on the four inner side surfaces of the connecting side box 4. Specifically, it includes an outer side clamping wheel 431, an inner side clamping wheel 432, an upper side clamping wheel 433, and a lower side clamping wheel 434. The outer and inner side clamping wheels 432 and 431 are used to coordinate the back and forth oscillation of the floating fixing belt 5 during the testing process. The two fixing plates I 51 and the fixing plates I 51 and II 52 can rotate to a specific angle, so that each tester 9 maintains floating operation and improves safety performance. Based on the cooperation of the connecting block 57 and the connecting slot 58, the fixing plates I 51 and the fixing plates I 51 and II 52 cannot move relative to each other along the Z-axis. This solution allows the tester 9 to slide left and right on the floating fixed belt 5. The floating fixed belt 5, connected by a pin 53, can float forward and backward. As shown in the figure, during testing, the tester 9 can float in the XY plane as the wire rope 10 swings, limiting the movement of the tester along the wire rope 10 in the Z direction. Connecting rings 54 are provided at the corners of the floating fixed belt 5. Specifically, the connecting rings 54 are provided on the fixing plate II 52. The connecting rings 54 have threaded holes that mate with the connecting studs at the end of the fixed rope (not shown) to achieve a threaded connection. This facilitates the hanging of multiple testers 9 at specific locations via the floating fixed belt 5. The connecting rings 54 are threadedly connected to the connecting studs, facilitating disassembly. By connecting the connecting side box 4 with the floating fixed belt 5, the number of testers 9 can be increased, and each tester 9 can maintain floating operation, improving work efficiency. The clamping rollers on the four sides of the connecting side box 4 can reduce interference friction between the tester 9 and the floating fixed belt 5. The clamping roller 43 can make the floating fixing belt 5 move parallel to the connecting side box 4.

[0030] In this embodiment, multiple testers 9 are connected in series through a floating fixing belt 5 to detect the wire rope, which effectively solves the problem that the testers 9 in some positions are difficult to fix, the detection efficiency is low and the detection accuracy is affected. After improvement, this embodiment can fix multiple groups of testers through four connecting rings 54 at the corners in a detachable manner through studs and fixing ropes, and multiple groups of testers 9 only need four fixing points to achieve binding and fixation. The threaded connection method of the studs and the connecting rings 54 is convenient for installation and disassembly, and after being connected in series through the floating fixing belt 5, there is no risk of collision between the testers 9, and a single tester 9 can adaptively adjust its position. Simultaneous detection of multiple groups of testers 9 can effectively improve the detection efficiency.

[0031] The working principle of the detection device of this solution is as follows: Remove the wire rope damage detection device from the box and press the button 315 of the buckle 3. The two halves of the tester 9 (with magnets) will spring apart due to the repulsive force of the magnets. The two halves are now connected by the hinge 13. Turn the knob 245 of the locking head 243 to make the pawl 242 contact the outer teeth of the ratchet 241, preventing the ratchet 241 from rotating. The roller retaining arm 21 maintains this locked position. Because the roller retaining arm 21 is in a locked state when the tester 9 is installed on the wire rope 10, the roller 22 can be kept away from the wire rope 10. Therefore, there is no need to overcome the spring force when fastening the tester 9, making installation and fastening more labor-saving. After the tester 9 is clamped onto the wire rope 10, the two half shells are locked tightly with the opening and closing buckle 3. The knob 245 is turned to disengage the pawl 242 from the outer teeth of the ratchet 241. The roller retaining arm 21 is unlocked and placed in a floating state. The roller 22 at the end of the roller retaining arm 21 can press the wire rope 10. Multiple testers 9 are inserted into the floating fixing belt 5 through the connecting side box 4. The four corners of the floating fixing belt 5 are fixed to the outer shell on both sides of the hoist drum with fixing ropes. This completes the preparation work before the entire device is tested. When disassembling, the roller retaining arm 21 can be switched to the locked state first. At this time, the tester shell 1 will pop open under the action of magnetic repulsion (the spring force is not applied at this time), making the disassembly process safer.

[0032] The floating fixed belt 5 and tester 9 combination of this embodiment is particularly suitable for testing the wire rope 10 of a floor-standing hoist (a floor-standing hoist tester lacks a supporting platform). Furthermore, this solution is not limited to testing the wire rope 10 of a hoist and is equally applicable to testing wire ropes 10 in other scenarios.

[0033] Example 3 This embodiment is a further improvement on the first embodiment, and further includes a fixing base 7, which includes a bottom cross brace 72, a vertical frame 73, and a hanger 71 rotatably mounted on the vertical frame 73. As shown in the figure, the vertical frame 73 can be a triangular structure, with slots 731 provided on both sides of the lower portion of the vertical frame 73. The cross brace 72 is inserted into the slots 731 to provide bottom support. Preferably, the cross brace 72 has a T-shaped cross section, and the slots 731 are adapted to the structure of the cross brace 72 to ensure that the cross brace 72 is correctly inserted into the position. The hanger 71 is mounted on the top of the vertical frame 73 via a rotating joint 74.

[0034] When the cam 714 is in the closed position, the stopper 714 is in the closed position, and the stopper 714 is in the open position, so that the cam 714 can be turned off.

[0035] The method of using this embodiment is as follows: for example, the tester 9 is installed on the fixed seat 7, and the fixed seat 7 in this embodiment is placed on the support platform. The wire rope 10 passes through the center hole 14 of the tester 9, and is used for a single tester 9 to test the wire rope 10. The well-tower hoist has a support platform, so the combination of the fixed seat 7 and the tester 9 in this embodiment is particularly suitable for testing the wire rope 10 of the well-tower hoist. It should be noted that the tester 9 of this solution can be used in multiple groups to test multiple wire ropes 10 of the hoist at the same time, or it can test a certain wire rope 10 separately. In addition, this solution is not limited to testing the wire rope 10 of the hoist, and is also applicable to the detection of wire ropes 10 in other scenarios.

[0036] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the present profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A wire rope damage detection device, comprising a tester housing, the tester housing having a central hole formed axially therein for the wire rope to pass through, and roller retaining mechanisms disposed at each end of the tester housing. The roller retaining mechanisms are composed of a plurality of roller retaining assemblies arranged around the central hole, the roller retaining assemblies comprising roller retaining arms and a mounting base, the mounting base being fixed to the ends of the tester housing; the leading end of the roller retaining arm is rotatably connected to the mounting base, the trailing end of the roller retaining arm is rotatably provided with a roller, and the roller retaining arm is further connected to the mounting base via an elastic member I. The device is characterized in that: The roller holding arm can move between an open position and at least one retracted position. In the open position, the roller holding arm can be switched to a locked state relative to the tester housing; in the retracted position, the roller holding arm is in a floating state relative to the tester housing, and is used to continuously press the roller wheel surface at the end of the roller holding arm against the surface of the wire rope to be tested, so that the tester housing can achieve adaptive center positioning relative to the wire rope during the test; a self-locking mechanism is also provided on the roller holding arm, which is used to switch the roller holding arm between a locked state and a floating state in the open position.

2. A wire rope damage detection device according to claim 1, characterized in that: The roller holding mechanism includes at least two groups of roller holding components. The roller holding components are centrally symmetrical and evenly distributed around the central hole. The roller holding components at both ends of the tester housing are staggered.

3. The wire rope damage detection device according to claim 1, characterized in that: The tester shell includes half shell I and half shell II, and a bushing is arranged in the center hole, and the bushing includes bushing I and bushing II; bushing I is fixedly arranged in half shell I, and bushing II is fixedly arranged in half shell II, and annular protrusions for installing sensors are arranged in the middle sections of half shell I and half shell II, and annular grooves for cooperating with the annular protrusions are arranged on the opposite sides of bushing I and bushing II.

4. The wire rope damage detection device according to claim 1, characterized in that: The self-locking mechanism includes a ratchet and a pawl, wherein the ratchet is fixedly arranged at the head end of the roller retaining arm, the connecting end of the pawl is rotatably connected to the mounting base, and the pawl can move between a locked position and at least one unlocked position. In the locked position, the free end of the pawl abuts against the outer teeth of the ratchet, and in the unlocked position, the free end of the pawl disengages from the outer teeth of the ratchet.

5. The wire rope damage detection device according to claim 4, characterized in that: The self-locking mechanism includes a locking block and an elastic member II, which are respectively located on both sides of the pawl; The locking block is rotatably arranged on the tester housing, one end of the elastic member II abuts against the side surface of the pawl, and the other end is fixed to the mounting base; The locking block is rotated to the first position, the distal unlocking position of the locking block abuts against the pawl, the elastic member II is compressed, the pawl is disengaged from the ratchet and is in an unlocked state, the locking block is rotated to the second position, the proximal locking position of the locking block contacts the pawl, the elastic member II pushes the pawl to contact the outer teeth of the ratchet and is in a locked state.

6. A wire rope damage detection device according to any one of claims 1 to 5, characterized in that: The tester shell is also provided with a snap fastener; the snap fastener includes snap fastener I and snap fastener II, the half shell I is provided with snap fastener I, and the half shell II is provided with snap fastener II, and the snap fastener I and snap fastener II can be engaged or unlocked with each other to engage the half shell I and the half shell II into a sleeve structure or separate and open them.

7. The wire rope damage detection device according to claim 6, characterized in that: A connecting side box is provided on the side wall of the tester shell, and the connecting side boxes on different tester shells are connected into one body by connecting with a floating fixing belt.

8. The wire rope damage detection device according to claim 7, characterized in that: A side wall roller is provided on the side wall on the inner side of the connecting side box, and the floating fixing belt includes a movable chain formed by a fixing plate I movably connected by a pin shaft, and connecting rings for connecting to a fixing rope are provided at both ends of the movable chain, and the wheel surface of the side wall roller is in contact with the wide side and the narrow side of the floating fixing belt respectively.

9. The wire rope damage detection device according to claim 6, characterized in that: It also includes a fixing seat, on which a hanging piece is rotatably provided, and the hanging piece is detachably connected to the connecting side box.

10. A control method for a wire rope damage detection device, wherein the tester housing is formed with a center hole for the wire rope to pass through in the axial direction, and roller holding mechanisms are respectively provided at both ends of the tester housing. The roller holding mechanisms are composed of multiple roller holding assemblies arranged around the center hole, and the roller holding assemblies include a roller holding arm and a mounting base, and the mounting base is fixed to the end of the tester housing; the head end of the roller holding arm is rotatably connected to the mounting base, and the tail end of the roller holding arm is rotatably provided with a roller, and the roller holding arm is further connected to the mounting base via an elastic member I, characterized in that: The method comprises, At least one self-locking mechanism is provided on the roller holding arm, for switching the roller holding arm between a locked state and a floating state; The roller holding arm is movable between an open position and at least one retracted position. When the roller holding arm is rotated to the open position, the roller holding arm can be switched to a locked state by a self-locking mechanism for installation and removal of the detection device. The roller holding arm can be switched to a floating state through a self-locking mechanism, and the roller wheel surface at the end of the roller holding arm can simultaneously and continuously contact and compress the wire rope. The detection device can achieve adaptive centering adjustment relative to the wire rope during the test.

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