A variable-diameter full-coverage flaw magnetic flux leakage detection device for a crane boom

Abstract

A crane boom diameter-variable full-coverage magnetic flux leakage detection device includes: multiple detection mechanisms and multiple traveling mechanisms; the multiple traveling mechanisms are sequentially and movably connected; the multiple detection mechanisms are respectively connected to the multiple traveling mechanisms; the multiple detection mechanisms form a ring structure; the multiple detection mechanisms output signals to an external signal receiving device based on the collected magnetic field signals; the multiple traveling mechanisms adjust the distance between the multiple detection mechanisms based on the boom size. This invention, by setting up multiple detection mechanisms and traveling mechanisms, allows the detection mechanisms to collect magnetic field signals from the outer wall of the boom, and the traveling mechanisms to adjust the detection devices based on the boom cross-sectional dimensions. When the boom cross-sectional dimensions change, the detection mechanisms conform to various wall surfaces of the boom, resulting in a wide detection range. The detection device does not rely on external force during the detection process, achieving fully automated detection to collect magnetic field signals of structural defects in the boom, realizing full-coverage detection of the boom and preventing missed defects.

Description

Technical Field

[0001] This invention relates to the technical field of power transmission and transformation engineering, specifically to a crane boom diameter-variable full-coverage defect magnetic flux leakage detection device. Background Technology

[0002] Cranes are widely used in power transmission line tower erection operations due to their ease of movement and flexible lifting, luffing, and slewing movements. As the main load-bearing component of a crane, the boom is susceptible to structural defects caused by alternating loads, fatigue, friction, wear, and corrosion. These defects can lead to strength loss and eventual breakage, and are a major contributing factor to crane boom failure accidents. Therefore, locating and detecting structural defects in crane booms is crucial for effectively preventing boom breakage accidents and ensuring the safe operation of power transmission line tower erection operations.

[0003] After a crane has been in use for a certain period of time, routine maintenance typically involves visually inspecting the boom for structural defects. If any abnormalities are found, their locations are marked, and a second inspection is conducted. However, relying primarily on human observation and inspection inevitably leads to false positives and false negatives. Furthermore, the complex cross-sectional shape of crane booms, with variations in cross-sectional dimensions across different boom sections, makes manual visual inspection difficult. Currently, there is no dedicated technology or equipment for inspecting crane booms. Summary of the Invention

[0004] To address the problem, this invention proposes a crane boom diameter-changing full-coverage magnetic flux leakage detection device for detecting structural defects in crane booms (41), which includes multiple detection mechanisms and multiple travel mechanisms.

[0005] The multiple traveling mechanisms are sequentially connected;

[0006] The plurality of detection mechanisms are respectively connected to the plurality of traveling mechanisms; the plurality of detection mechanisms form a ring structure for collecting magnetic field signals from the outer wall of the boom (41);

[0007] The multiple detection mechanisms output signals to an external signal receiving device based on the collected magnetic field signals; the multiple traveling mechanisms adjust the distance between the multiple detection mechanisms based on the size of the boom (41).

[0008] Preferably, the plurality of traveling mechanisms includes an upper traveling mechanism and two side traveling mechanisms;

[0009] The upper traveling mechanism includes: an upper mounting component with a strip-shaped structure and upper adjusting components disposed at both ends of the upper mounting component;

[0010] The upper adjustment component is an elastic structure;

[0011] The two side traveling mechanisms are respectively connected to both sides of the upper traveling mechanism via the two upper adjusting components;

[0012] The plurality of detection mechanisms are respectively connected to the upper mounting assembly and the two side traveling mechanisms.

[0013] Preferably, the upper adjustment assembly includes: an upper elastic element, an upper connecting element, and an upper fixing element;

[0014] The upper elastic member, the upper connecting member, and the upper fixing member are arranged in sequence;

[0015] Both the upper elastic member and the upper connecting member are movably connected to the upper mounting assembly;

[0016] The upper elastic member and the upper connecting member are elastically connected;

[0017] The upper fixing component is detachably fixed to the upper mounting assembly;

[0018] The upper fixing member is fixedly connected to the upper connecting member;

[0019] The two side travel mechanisms are respectively mounted on the two upper connecting parts.

[0020] Preferably, the upper elastic element includes an upper movable screw (3), an upper locking nut (4), and an upper compression spring (5) all sleeved on the upper mounting assembly;

[0021] The upper movable screw (3) is sleeved on the upper mounting assembly;

[0022] The upper movable screw (3) and the upper locking nut (4) are threaded together;

[0023] The upper compression spring (5) is sleeved on the upper movable screw (3), and its two ends abut against the upper locking nut (4) and the upper connecting piece, respectively.

[0024] Preferably, the upper elastic element further includes an upper pin;

[0025] The upper mounting assembly has multiple holes that are adapted to the upper pin.

[0026] The upper movable screw (3) has a hole that matches the upper pin;

[0027] The upper pin passes through the hole on the upper mounting assembly and the hole on the upper movable screw (3).

[0028] Preferably, the upper fixing member includes an upper bearing connecting seat (6) and an upper set screw (7);

[0029] The upper bearing connecting seat (6) is slidably connected to the upper mounting assembly;

[0030] One end of the upper bearing connecting seat (6) is connected to the upper connecting member;

[0031] The upper set screw (7) is threadedly connected to the upper bearing connecting seat (6), and the upper set screw (7) passes through the upper bearing connecting seat (6) and abuts against the upper mounting assembly.

[0032] Preferably, the side travel mechanism includes: a side mounting assembly and a side adjustment assembly;

[0033] The side mounting assembly has a strip-shaped structure;

[0034] The side adjustment component is an elastic structure;

[0035] One end of the side mounting component is connected to the upper adjustment component, and the other end is connected to the side adjustment component;

[0036] The plurality of detection mechanisms are respectively connected to the upper mounting assembly, the two side mounting assemblies and the two side adjustment assemblies.

[0037] Preferably, the side adjustment assembly includes side connectors and side elastic members both sleeved on the side mounting assembly;

[0038] One end of the side elastic member is fixed to the end of the side mounting assembly away from the upper adjustment assembly, and the other end is abutted against the side connector.

[0039] The side connector is slidably connected to the side mounting assembly and is disposed on the side of the side elastic member near the upper adjustment assembly;

[0040] The side connector and the side elastic member abut against each other.

[0041] Preferably, the side elastic element includes a side movable screw (23), a side locking nut (24), and a side compression spring (25) all sleeved on the side mounting assembly;

[0042] The side movable screw (23) is sleeved on the side mounting assembly;

[0043] The side movable screw (23) and the side locking nut (24) are threaded together;

[0044] The side compression spring (25) is sleeved on the side movable screw (23), and its two ends abut against the side locking nut (24) and the side connector, respectively.

[0045] Preferably, the side elastic element further includes a side pin;

[0046] The side mounting assembly has multiple holes that are adapted to the side pin.

[0047] The side movable screw (23) has a hole that matches the side pin;

[0048] The side pin passes through the hole on the side mounting assembly and the hole on the side movable screw (23).

[0049] Preferably, the side connector includes a lower hanging plate (26) with a plate-like structure;

[0050] The lower mounting plate (26) is movably connected to the side mounting assembly;

[0051] The lower hanging plate (26) abuts against the side compression spring (25);

[0052] The plurality of testing mechanisms are respectively connected to the upper mounting assembly, the two side mounting assemblies and the two lower mounting plates (26).

[0053] Preferably, the plurality of detection mechanisms include: an upper detection mechanism, a side detection mechanism, and a lower detection mechanism, all of which are chain-like structures;

[0054] The middle part of the upper detection mechanism is connected to the upper mounting assembly;

[0055] The side detection mechanisms are respectively connected to the side mounting components;

[0056] The two ends of the lower detection mechanism are respectively connected to the side connector.

[0057] Preferably, the upper detection mechanism includes two upper chain sensors (8);

[0058] One end of each of the two upper chain sensors (8) is connected;

[0059] The two upper chain sensors (8) and the traveling mechanism are arranged along the extension direction of the boom;

[0060] The two upper chain sensors (8) are installed in the middle of the traveling mechanism.

[0061] Preferably, the upper detection mechanism further includes an upper detection fixing seat (9) which is plate-shaped, two upper detection connecting seats (10) and an upper guide member;

[0062] The upper detection fixing seat (9) is fixed to the middle of the upper mounting assembly;

[0063] The two upper detection connecting seats (10) are respectively installed on both sides of the upper detection fixing seat (9);

[0064] The two upper chain sensors (8) are rotatably connected to the two upper detection connecting seats (10) respectively;

[0065] The upper guide is rotatably connected between the two upper detection fixing seats (9).

[0066] Preferably, the detection mechanism is a chain sensor.

[0067] Preferably, the chain sensor includes multiple detection housings and multiple detection sensors;

[0068] Each of the aforementioned detection housings is rotatably connected to at least one detection sensor;

[0069] The multiple detection housings are rotated and connected in sequence.

[0070] Preferably, the side detection mechanism includes a side chain sensor (28), a side connecting seat (29) with a plate-like structure, and a side guide;

[0071] One end of the side connecting seat (29) is mounted on the traveling mechanism, and the other end is fixedly connected to the side chain sensor (28);

[0072] The side chain sensor (28) and the traveling mechanism are arranged along the extension direction of the boom;

[0073] The side guide is rotatably connected to the end of the side connecting seat (29) away from the traveling mechanism.

[0074] Preferably, the lower detection mechanism includes a lower chain sensor (39) and multiple lower small guide wheels (40);

[0075] The two ends of the lower chain sensor (39) are respectively connected to the two traveling mechanisms;

[0076] The plurality of lower guide wheels (40) are respectively spaced apart on both sides of the lower chain sensor (39).

[0077] Preferably, both the upper traveling mechanism and the side traveling mechanism include rollers and a power assembly;

[0078] The output shaft of the power component is fixedly connected to the roller;

[0079] The plurality of rollers are respectively rotatably connected to the upper mounting assembly and the side mounting assembly;

[0080] The plurality of power components are respectively fixed to the upper mounting component and the side mounting component.

[0081] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0082] This invention provides a full-coverage magnetic flux leakage detection device for crane booms with varying diameters, used to detect structural defects in crane booms. It includes: multiple detection mechanisms and multiple traveling mechanisms for collecting magnetic field signals from the outer wall of the boom; the multiple traveling mechanisms are sequentially connected; the multiple detection mechanisms are respectively connected to the multiple traveling mechanisms; the multiple detection mechanisms form a ring structure for collecting magnetic field signals from the outer wall of the boom; the multiple detection mechanisms output signals to an external signal receiving device based on the collected magnetic field signals; the multiple traveling mechanisms adjust the distance between the multiple detection mechanisms based on the size of the boom. This invention, by setting multiple detection mechanisms and multiple traveling mechanisms, with the multiple detection mechanisms forming a ring structure for collecting magnetic field signals from the outer wall of the boom, and the multiple traveling mechanisms enabling the entire detection device to be adjusted based on the cross-sectional shape and size of the crane boom, allows the detection mechanisms to conform to various detection surfaces of the boom when the boom cross-sectional size decreases or increases, resulting in a wide detection range. The entire testing device does not rely on external force during the testing process. It achieves fully automated testing to collect magnetic field signals of structural defects in the crane boom, realizing full coverage testing of the entire crane boom and preventing the occurrence of missed defects. Attached Figure Description

[0083] Figure 1 This is a schematic diagram of the overall structure of the crane boom diameter-variable full-coverage defect magnetic flux leakage detection device of the present invention when it is installed on the boom to detect the boom.

[0084] Figure 2 for Figure 1 Enlarged view of part A;

[0085] Figure 3 This is a schematic diagram of the overall structure of the crane boom diameter-variable full-coverage defect magnetic flux leakage detection device of the present invention;

[0086] Figure 4 for Figure 3 Enlarged view of part B;

[0087] Figure 5 for Figure 3 Enlarged view of part C;

[0088] Figure 6 This is a schematic diagram of the overall structure of the upper traveling mechanism of the present invention;

[0089] Figure 7 for Figure 6 Enlarged view of part D;

[0090] Figure 8 This is a top view of the upper traveling mechanism of the present invention.

[0091] Figure 9 for Figure 8 A schematic diagram of the FF cross-sectional structure;

[0092] Figure 10 for Figure 9 Enlarged view of part G;

[0093] Figure 11 for Figure 9 Enlarged view of the H section;

[0094] Figure 12 for Figure 9 Enlarged view of Part I;

[0095] Figure 13 for Figure 9 Enlarged view of part J;

[0096] Figure 14 This is a schematic diagram of the overall structure of the upper detection mechanism of the present invention;

[0097] Figure 15 This is a schematic diagram of the overall structure of the side travel mechanism and the side detection mechanism of the present invention;

[0098] Figure 16 This is a front view schematic diagram of the side travel mechanism and the side detection mechanism of the present invention;

[0099] Figure 17 for Figure 16 Schematic diagram of the KK cross-sectional structure;

[0100] Figure 18 for Figure 17 Enlarged view of the L section;

[0101] Figure 19 for Figure 17 Enlarged view of part M;

[0102] Figure 20 for Figure 17 N enlarged images;

[0103] Figure 21 This is a schematic diagram of the overall structure of the lower hanging plate and the lower hook of the present invention;

[0104] Figure 22 This is a schematic diagram of the overall structure of the lower detection mechanism and the lower hook of the present invention.

[0105] Figure 23 for Figure 22 Enlarged view of part O;

[0106] Figure 24 This is a top view schematic diagram of the connection between the lower detection mechanism and the lower hook of the present invention;

[0107] Figure 25 for Figure 24 A schematic diagram of the cross-sectional structure of PP;

[0108] Figure 26 for Figure 25 Enlarged view of the Q part.

[0109] The components include: 1. Upper travel light bar; 2. Side suspension seat; 3. Upper movable screw; 4. Upper locking nut; 5. Upper compression spring; 6. Upper bearing connecting seat; 7. Upper set screw; 8. Upper chain sensor; 9. Upper detection fixing seat; 10. Upper detection connecting seat; 11. Upper small guide wheel; 12. Upper drive rubber-coated wheel; 13. Upper first triangular plate; 14. Upper second triangular plate; 15. Upper triangular plate connecting rod; 16. Upper drive motor; 17. Upper drive motor fixing flange; 18. Upper coupling; 19. Center guide wheel; 20. Center connecting seat; 21. Side mounting seat. 22. Side travel light bar; 23. Side movable screw; 24. Side locking nut; 25. Side compression spring; 26. Lower hanging plate; 27. Lower hook; 28. Side chain sensor; 29. ​​Side connecting seat; 30. Side small guide wheel; 31. Side drive rubber-coated wheel; 32. Side first triangular plate; 33. Side second triangular plate; 34. Side triangular plate connecting rod; 35. Side drive motor; 36. Side drive motor fixing flange; 37. Side coupling; 38. Controller mounting base; 39. Lower chain sensor; 40. Lower small guide wheel; 41. Boom; 42. Detection device. Detailed Implementation

[0110] This invention discloses a crane boom diameter-variable full-coverage defect magnetic flux leakage detection device. This device comprises multiple detection mechanisms and multiple traveling mechanisms. The detection mechanisms collect magnetic field signals from the outer wall of the boom, while the traveling mechanisms allow the entire detection device to be adjusted based on the cross-sectional shape and size of the crane boom, resulting in a wide detection range. The entire detection device operates without external force, achieving fully automated detection of magnetic field signals for boom structural defects, thus providing full-coverage detection of the entire boom and preventing missed defects.

[0111] Cranes are widely used in power transmission line tower erection operations due to their ease of movement and flexible lifting, luffing, and slewing movements. As the main load-bearing component of a crane, the boom is susceptible to structural defects caused by alternating loads, fatigue, friction, wear, and corrosion, leading to strength reduction and eventual breakage. This is a major contributing factor to crane boom failure accidents. While magnetic flux leakage (MF) testing is a highly efficient non-destructive testing method, there is currently no device for detecting crane boom defects based on MF testing. Therefore, this invention proposes a MF testing device suitable for detecting crane boom defects, enabling the localization and detection of structural defects in the crane boom. This is of great significance for effectively preventing crane boom breakage accidents and ensuring the safe operation of power transmission line tower erection operations.

[0112] A crane boom diameter-variable full-coverage defect magnetic flux leakage detection device, such as Figure 1 and Figure 3 As shown, the method for detecting structural defects in the crane boom 41 includes: multiple detection mechanisms and multiple traveling mechanisms; the multiple traveling mechanisms are sequentially connected; the multiple detection mechanisms are respectively connected to the multiple traveling mechanisms; the multiple detection mechanisms form a ring structure for collecting magnetic field signals from the outer wall of the boom 41; the multiple detection mechanisms output signals to an external signal receiving device based on the collected magnetic field signals; and the multiple traveling mechanisms adjust the distance between the multiple detection mechanisms based on the size of the boom 41.

[0113] When the detection device 42 detects the boom 41, the ring structure formed by multiple detection mechanisms is fitted onto the boom 41. The multiple traveling mechanisms adjust the distance between the multiple detection mechanisms based on the size of the boom 41 until the ring structure formed by the multiple detection mechanisms fits into the boom 41.

[0114] The multiple traveling mechanisms include an upper traveling mechanism and two side traveling mechanisms; the upper traveling mechanism, such as... Figure 6 and Figure 9 As shown, the assembly includes: an upper mounting assembly with a strip-like structure and upper adjusting assemblies disposed at both ends of the upper mounting assembly; the upper adjusting assemblies are elastic structures; two side traveling mechanisms are respectively connected to both sides of the upper traveling mechanism through the two upper adjusting assemblies; multiple detection mechanisms are respectively connected to the upper mounting assembly and the two side traveling mechanisms; when the detection device 42 moves on the boom 41, the distance between the two side traveling mechanisms is adjusted by adjusting the distance between the upper adjusting assemblies, thereby adjusting the distance between the multiple detection mechanisms until the detection mechanisms are in contact with the boom 41. In this embodiment, the upper mounting assembly includes two upper traveling light bars 1 with a rod-like structure. The two upper traveling light bars 1 are parallel and placed in the horizontal direction.

[0115] Existing crane booms 41 typically employ a closed-loop U-shape cross-section, meaning the upper surface and two sides of the boom 41 are flat, the lower surface is approximately curved, and there is a rounded transition between the upper and side surfaces. The overall design of the boom 41 detection device 42 for transmission line tower erection provided in this embodiment matches the U-shaped cross-section of the boom 41, achieving full-coverage detection of all surfaces of the entire boom 41. For cranes of the same tonnage, different boom sections 41 have the same cross-sectional shape but varying dimensions, with the dimensions of subsequent boom sections gradually decreasing from the main boom as a reference. In this embodiment, the extension direction of the boom 41 axis is used as the front-rear direction of the overall structure.

[0116] Upper adjustment components, such as Figure 6 and Figure 7 As shown, it includes: an upper elastic element, an upper connecting element, and an upper fixing element; the upper elastic element, upper connecting element, and upper fixing element are arranged sequentially; the upper elastic element and the upper connecting element are both movably connected to the upper mounting assembly; the upper elastic element and the upper connecting element are elastically connected; the upper fixing element is detachably fixed to the upper mounting assembly; the upper fixing element and the upper connecting element are fixedly connected; two side traveling mechanisms are respectively installed on the two upper connecting elements. Based on the size of the boom 41, the positions of the two upper connecting elements on the upper mounting assembly are adjusted, thereby adjusting the distance between the multiple detection mechanisms until the detection mechanism is in contact with the boom 41. In this embodiment, the upper adjustment components are configured as two sets, which are respectively installed at both ends of the upper traveling light bar 1. Each set of upper adjustment components includes an upper connector, two sets of upper elastic members and an upper fixing member. The upper connector is connected to the ends of the two upper traveling light bars 1 located on the same side. The two sets of upper elastic members and upper fixing members are respectively installed at the ends of the two upper traveling light bars 1 located on the same side.

[0117] The upper connector includes a side suspension seat 2 with a plate-like structure, such as Figure 7 and Figure 9 As shown; the side suspension seat 2 is slidably connected to the upper mounting assembly; both sides of the side suspension seat 2 are respectively connected to the upper elastic element and the upper fixed element; the side walking mechanism is mounted on the side suspension seat 2. The side suspension seat 2 has a through hole for the upper traveling light bar 1 to pass through, and a linear bearing is installed in the through hole, such as... Figure 11 As shown, the upper traveling light bar 1 is installed inside the linear bearing, and the side suspension seat 2 moves along the axial direction of the upper traveling light bar 1 through the linear bearing.

[0118] The upper elastic components include an upper movable screw 3, an upper locking nut 4, and an upper compression spring 5, all of which are fitted onto the upper mounting assembly. Figure 10As shown; the upper movable screw 3 is sleeved on the upper mounting assembly; the upper movable screw 3 and the upper locking nut 4 are threadedly connected; the upper compression spring 5 is sleeved on the upper movable screw 3, and its two ends abut against the upper locking nut 4 and the upper connecting piece, respectively. The upper elastic element also includes an upper pin; the upper mounting assembly has multiple holes adapted to the upper pin; the upper movable screw 3 has one hole adapted to the upper pin; the upper pin passes through the hole on the upper mounting assembly and the hole on the upper movable screw 3.

[0119] The upper fixing component includes an upper bearing connecting seat 6 and an upper set screw 7, such as Figure 13 As shown; the upper bearing connecting seat 6 is slidably connected to the upper mounting assembly; one end of the upper bearing connecting seat 6 is connected to the upper connecting piece; the upper set screw 7 is threadedly connected to the upper bearing connecting seat 6, and the upper set screw 7 passes through the upper bearing connecting seat 6 and abuts against the upper mounting assembly.

[0120] For the upper traveling mechanism, multiple holes are opened at both ends of the upper traveling guide bar 1. The upper movable screw 3 is sleeved on the upper traveling guide bar 1. The position of the upper movable screw 3 on the upper traveling guide bar 1 is limited by the upper pin. When the large section boom 41 is detected, the upper movable screw 3 is located at both ends of the upper traveling guide bar 1. The dimensions of different sections of boom 41 of the same model of crane vary greatly. When the dimensions of the upper wall of boom 41 change significantly from large to small, the upper pin is pulled out and the upper movable screw 3 is moved to the center of the upper traveling guide bar 1 to a suitable position before being inserted again, so as to realize the adjustment when the cross-sectional dimensions of different sections of boom 41 change. The straight section of the upper movable screw 3 is machined with external threads. The upper locking nut 4 is threaded onto the upper movable screw 3. One end of the upper compression spring 5 abuts against the end face of the upper locking nut 4, and the other end abuts against the end face of the side suspension seat 2. Linear bearings are installed in the two holes of the side suspension seat 2. The size of the upper compression spring 5 can be adjusted by rotating the position of the upper locking nut 4. In this embodiment, the connection relationship between the side suspension seat 2 and the upper bearing connecting seat 6 can be: the side suspension seat 2 is fixedly connected to the linear bearing, and the side suspension seat 2 abuts against the upper bearing connecting seat 6, which is convenient for adaptive testing of the uneven side of the boom 41 and has strong practicality; or the linear bearing and the upper bearing connecting seat 6 are both fixedly connected to the side suspension seat 2 by bolts, which is suitable for routine testing of the boom 41 with a short service time. In actual use, the position of the upper elastic element on the upper travel light bar 1 must be adjusted first, and the elastic force of the upper compression spring 5 must be sufficient to push the side suspension seat 2 to slide on the upper travel light bar 1. When the side suspension seat 2 is in a position that matches the size of the boom 41, rotate the upper set screw 7 until the upper set screw 7 is pressed against the upper travel light bar 1. At this time, the upper bearing connecting seat 6 is fixed on the upper travel light bar 1.

[0121] The lateral travel mechanism includes: a lateral mounting assembly and a lateral adjustment assembly, such as... Figure 15 and Figure 16 As shown; the side mounting assembly has a strip-shaped structure; the side adjustment assembly has an elastic structure; one end of the side mounting assembly is connected to the upper adjustment assembly, and the other end is connected to the side adjustment assembly; multiple detection mechanisms are respectively connected to the upper mounting assembly, two side mounting assemblies, and two side adjustment assemblies; when the detection device 42 moves on the boom 41, the distance between the side adjustment assembly and the upper adjustment assembly is adjusted, thereby adjusting the distance between the multiple detection mechanisms until the detection mechanism is in contact with the boom 41. In this embodiment, the side mounting assembly includes a plate-shaped side connecting seat 29 and two rod-shaped side traveling light bars 22. The two side traveling light bars 22 are parallel and placed in the vertical direction. One side of the side mounting base 21 is rotatably connected to the side suspension base 2, and the other end is fixedly connected to two side travel light bars 22. The two side travel light bars 22 are respectively fixed on both sides of the side mounting base 21. A suspension rod is provided between the side mounting base 21 and the side suspension base 2, and the side mounting base 21 and the side suspension base 2 are rotatably connected through the suspension rod.

[0122] The side adjustment assembly includes side connectors and side elastic members, both sleeved on the side mounting assembly. One end of the side elastic member is fixed to the end of the side mounting assembly away from the upper adjustment assembly, and the other end abuts against the side connector. The side connector is slidably connected to the side mounting assembly and is located on the side of the side elastic member closer to the upper adjustment assembly. The side connector and the side elastic member abut against each other. When the detection device 42 moves on the boom 41, the distance between the side connector and the upper adjustment assembly is adjusted by the side elastic member, thereby adjusting the distance between the multiple detection mechanisms until the detection mechanism is in contact with the boom 41.

[0123] The side elastic components include side movable screws 23, side locking nuts 24, and side compression springs 25, all of which are sleeved on the side mounting assembly. Figure 17 and Figure 18 As shown; the side-moving screw 23 is sleeved on the side mounting assembly; the side-moving screw 23 and the side locking nut 24 are threadedly connected; the side compression spring 25 is sleeved on the side-moving screw 23, and its two ends abut against the side locking nut 24 and the side connecting piece, respectively. The side elastic element also includes a side pin; the side mounting assembly has multiple holes adapted to the side pin; the side-moving screw 23 has one hole adapted to the side pin; the side pin passes through the hole on the side mounting assembly and the hole on the side-moving screw 23.

[0124] Side connectors, such as Figure 15 and Figure 19As shown, it includes a lower mounting plate 26 with a plate-like structure; the lower mounting plate 26 is movably connected to the side mounting components; the lower mounting plate 26 abuts against the side compression springs 25; multiple detection mechanisms are respectively connected to the upper mounting components, two side mounting components, and two lower mounting plates 26. The lower mounting plate 26 is provided with a lower hook 27; the detection mechanisms are hung in the lower hooks 27, such as... Figure 15 and Figure 21 As shown.

[0125] For the side travel mechanism, under the action of the upper compression spring 5, the side suspension seat 2 moves to the center of the upper travel light bar 1. The side suspension seat 2 is rotatably connected to the side mounting seat 21 through the suspension rod. The side travel light bar is located on both sides of the side mounting seat 21 and is fixed. Multiple holes are opened at the end of the side travel light bar away from the side mounting seat 21. The side movable screw 23 is sleeved on the side travel light bar and fixed in position by the pin. When the side wall height of different sections of the boom 41 changes, the position of the side movable screw 23 is adjusted to match the change in side wall height. One end of the side compression spring 25 contacts the end face of the side locking nut 24 and the other end contacts the end face of the side connector.

[0126] The multiple testing units include: an upper testing unit, two side testing units, and a lower testing unit, all arranged in a chain-like structure, such as... Figure 3 and Figure 5 As shown; the middle part of the upper detection mechanism is connected to the upper mounting assembly; the two side detection mechanisms are respectively connected to the two side mounting assemblies; the two ends of the lower detection mechanism are respectively connected to the two side connecting pieces; when the detection device 42 moves on the boom 41, the distance between the two upper adjustment assemblies is adjusted, the distance between the two side mounting assemblies is adjusted, and then the distance between the two side detection mechanisms is adjusted; the distance between the side connecting pieces and the upper adjustment assembly is adjusted by the side adjustment assemblies, thereby adjusting the distance between the lower detection mechanism and the upper detection mechanism, and then adjusting the distance between multiple detection mechanisms until the detection mechanism is in contact with the boom 41.

[0127] All detection mechanisms are chain-type sensors, meaning the upper, side, and lower detection mechanisms are all chain-type sensors; the chain sensors are attached to the boom 41. Each chain sensor includes multiple detection housings and multiple detection sensors; each detection housing has at least one detection sensor rotatably connected inside; the multiple detection housings are sequentially rotatably connected, and in this embodiment, the multiple detection housings are sequentially hinged. The detection sensors include Hall effect sensors.

[0128] The upper detection mechanism includes two upper chain sensors 8, such as Figure 14As shown; one end of each of the two upper chain sensors 8 is connected; the two upper chain sensors 8 and the upper mounting assembly are arranged along the extension direction of the boom 41; the connecting part of the two upper chain sensors 8 is installed in the middle of the upper mounting assembly; when the detection device 42 moves on the boom 41, both upper chain sensors 8 are in contact with the boom 41. The upper detection mechanism also includes upper detection fixing seats 9, two upper detection connecting seats 10, and an upper guide member, all of which are plate-shaped; the upper detection fixing seat 9 is fixed in the middle of the upper mounting assembly; the two upper detection connecting seats 10 are respectively installed on both sides of the upper detection fixing seat 9; the two upper chain sensors 8 are respectively rotatably connected to the two upper detection connecting seats 10; the upper guide member is rotatably connected between the two upper detection fixing seats 9. The upper guide member includes a small upper guide wheel 11 with a cylindrical structure, such as Figure 4 As shown; there are two upper detection fixing seats 9; the upper small guide wheel 11 is rotatably connected between the two upper detection fixing seats 9; the two upper detection connecting seats 10 are respectively installed on the sides of the two upper fixing seats that are far apart from each other; when the detection device 42 moves on the boom 41, the upper small guide wheel 11 contacts the boom 41 and moves along the axis of the boom 41. The upper small guide wheel 11 protrudes from the lower side of the upper detection fixing seat 9 and contacts the boom 41.

[0129] One end of the upper detection fixing seat 9 is sleeved on the middle of the upper traveling light bar 1 and connected to the upper detection connecting seat 10. The upper detection connecting seat 10 is equipped with an upper chain sensor 8. The upper chain sensor 8 adopts a tank chain hinge structure, that is, multiple detection housings are connected in sequence to form a tank chain structure. The detection sensor is installed inside the detection housing. Each detection sensor can rotate relative to the detection housing. During detection, the detection sensor can achieve contact detection with the upper wall of the boom 41 and the rounded corner of the boom 41. The contact force is the self-weight of the detection housing and the detection sensor to contact.

[0130] The side detection mechanism includes a side chain sensor 28, a plate-shaped side connecting seat 29, and a side guide, such as... Figure 15As shown; one end of the side connecting seat 29 is mounted on the side mounting assembly, and the other end is fixedly connected to the side chain sensor 28; the side chain sensor 28 and the side mounting assembly are arranged along the extension direction of the boom 41; the side guide is rotatably connected to the end of the side connecting seat 29 away from the side mounting assembly. The side guide includes a small side guide wheel 30 with a cylindrical structure; the small side guide wheel 30 is rotatably connected to the end of the side connecting seat 29 away from the side mounting assembly; when the detection device 42 moves on the boom 41, the small side guide wheel 30 contacts the boom 41 and moves along the axial direction of the boom 41. In this embodiment, the side connecting seat 29 is fixed to the side walking light bar by a side set screw. A side mounting groove is provided at the end of the side connecting seat 29 away from the side walking light bar 22; the small side guide wheel 30 is rotatably connected in the side mounting groove.

[0131] The lower detection mechanism includes a lower chain sensor 39 and multiple lower small guide wheels 40, such as... Figure 22 and Figure 24 As shown; the two ends of the lower chain sensor 39 are respectively connected to two side connectors, as shown. Figure 25 and Figure 26 As shown; multiple small lower guide wheels 40 are respectively and spaced apart on both sides of the lower chain sensor 39, as... Figure 23 As shown; when the detection device 42 moves on the boom 41, the lower small guide wheel 40 contacts the boom 41 and moves along the axis of the boom 41.

[0132] The two ends of the lower chain sensor 39 are respectively hung in two lower hooks 27, and thus rotatably connected to the side traveling mechanism. Guide wheel mounting seats are fixed to both sides of the lower chain sensor 39 by screws. The guide wheel mounting seats are equipped with lower small guide wheels 40 to reduce frictional resistance during travel and prevent the lower chain sensor 39 from rubbing against the lower wall of the boom 41, thereby realizing the acquisition of magnetic field signals from the lower wall of the boom 41.

[0133] Both the upper traveling mechanism and the side traveling mechanism include rollers and power components; the output shaft of the power component is fixedly connected to the rollers; multiple rollers are rotatably connected to the upper mounting component and the side mounting component respectively; multiple power components are fixed to the upper mounting component and the side mounting component respectively; when the detection device 42 detects the boom 41, the rollers on the upper traveling mechanism and the rollers on the side traveling mechanism contact the boom 41 and move along the axial direction of the boom 41.

[0134] The upper traveling mechanism's rollers include an upper drive rubber-coated wheel 12, and the power component of the upper traveling mechanism is an upper power component, such as... Figure 6 and Figure 8As shown; the upper power assembly is mounted on the upper mounting assembly; the upper drive rubber-coated wheel 12 is fixedly connected to the upper power assembly; the upper drive rubber-coated wheel 12 and the upper power assembly are arranged between the two upper adjustment assemblies; when the detection device 42 is detecting on the boom 41, the upper power assembly drives the upper drive rubber-coated wheel 12 to rotate, causing the detection device 42 to move along the extension direction of the boom 41.

[0135] The upper drive wheel 12 is externally mounted on an upper drive bracket and is rotatably connected within the upper drive bracket, such as... Figure 12 As shown; the upper power assembly is fixed on the upper drive bracket; the output shaft of the upper power assembly is fixedly connected to the upper drive rubber-coated wheel 12; the two upper drive brackets are respectively movably sleeved on both ends of the upper travel light bar 1; one end of the upper drive bracket abuts against the upper bearing connecting seat 6.

[0136] Upper drive bracket, such as Figure 12 As shown, it includes an upper first triangular plate 13, an upper second triangular plate 14, and three upper triangular plate connecting rods 15; the upper first triangular plate 13 and the upper second triangular plate 14 are placed in parallel, and the two ends of the three upper triangular plate connecting rods 15 are respectively fixed to the upper first triangular plate 13 and the upper second triangular plate 14; two upper travel light bars 1 pass through the upper first triangular plate 13 and the upper second triangular plate 14; the two ends of the upper drive rubber-coated wheel 12 are respectively rotatably connected to the upper first triangular plate 13 and the upper second triangular plate 14; the upper first triangular plate 13 is connected to the upper travel adjustment unit.

[0137] The upper drive rubber-coated wheel 12 and the upper power assembly are respectively installed on both sides of the upper first triangular plate 13; the upper drive rubber-coated wheel 12 passes through the upper first triangular plate 13 and is fixedly connected to the output shaft of the upper power assembly.

[0138] The upper first triangular plate 13 and the upper second triangular plate 14 are of the same size, and the lower surfaces of both the upper first triangular plate 13 and the upper second triangular plate 14 are parallel to the plane containing the axes of the two upper traveling light bars 1. The ends of the three upper triangular plate connecting rods 15 are respectively fixed to the corners of the upper first triangular plate 13 and the upper second triangular plate 14. The axes of the three upper triangular plate connecting rods 15 are parallel to the axes of the upper traveling light bars 1, and the two lower upper triangular plate connecting rods 15 are sleeved on the upper traveling light bars 1. In this embodiment, the two upper second triangular plates 14 are disposed between the two upper first triangular plates 13.

[0139] like Figure 6 and Figure 7As shown, the upper power assembly includes an upper drive motor 16; the upper drive motor 16 is mounted on an upper drive bracket; the output shaft of the upper drive motor 16 is fixedly connected to the upper drive rubber-coated wheel 12. The upper power assembly also includes a mounting flange for the upper drive motor 16; one end of the mounting flange is mounted on the upper drive bracket, and the other end is connected to the upper drive motor 16. The upper power assembly also includes an upper coupling 18; the upper coupling 18 is installed inside the mounting flange of the upper drive motor 16. One end of the upper coupling 18 is fixedly connected to the output shaft of the upper drive motor 16, and the other end is fixedly connected to the upper drive rubber-coated wheel 12.

[0140] The upper drive bracket also includes: multiple linear bearings; multiple linear bearings are respectively sleeved between the upper first triangular plate 13 and the upper traveling light bar 1, and between the upper second triangular plate 14 and the upper traveling light bar 1; multiple linear bearings are respectively fixedly connected to the upper first triangular plate 13 and the upper second triangular plate 14.

[0141] As the movable screw moves to the center of the upper travel guide bar 1, the upper drive rubber-coated wheel 12 and the upper power assembly move synchronously to the center of the upper travel guide bar 1 under the action of the upper compression spring 5 and multiple linear bearings. When the upper wall of the boom 41 narrows, the drive rubber-coated wheel can move synchronously to always maintain contact with the upper wall of the boom 41. After adjustment, it is fixed by the upper set screw 7.

[0142] The upper traveling mechanism also includes a central guide wheel 19, such as Figure 2 As shown; the central guide wheel 19 is rotatably connected to the middle of the side of the upper mounting assembly away from the multiple detection mechanisms; when the detection device 42 moves on the boom 41, the central guide wheel 19 contacts the boom 41 and moves along the axis of the boom 41. A central connecting seat 20 is provided on the outer side of the central guide wheel 19. The central connecting seat 20 is sleeved on the two upper traveling light bars 1, and the central guide wheel 19 is rotatably connected to the end of the central connecting seat 20 away from the upper detection mechanism. The axis of the central guide wheel is parallel to the axis of the upper traveling light bar 1.

[0143] The central connecting seat 20 is fixed to the middle of the upper traveling light bar 1; a U-shaped groove is provided at the end of the central connecting seat 20 near the upper detection component; the upper traveling light bar 1 away from the central guide wheel 19 passes through the opening of the U-shaped groove; the upper detection component is fixed on the upper traveling light bar 1 located in the U-shaped groove. The central connecting seat 20 has connecting holes adapted to the upper traveling light bar 1, and the two upper traveling light bars 1 are inserted into the connecting holes of the central connecting seat 20 and their symmetry is adjusted and limited by set screws. The central guide wheel 19 and the upper small guide wheel 11 are used for guidance during travel to prevent jamming.

[0144] The rollers of the side travel mechanism include a side drive rubber-coated wheel 31, and the power component of the side travel mechanism is a side power component; the side power component is mounted on the side mounting component; the side drive rubber-coated wheel 31 is fixedly connected to the side power component; the side drive rubber-coated wheel 31 and the side power component are arranged between the upper adjustment component and the side adjustment component; when the detection device 42 is detecting on the boom 41, the side power component drives the side drive rubber-coated wheel 31 to rotate, thereby driving the detection device 42 to move along the extension direction of the boom 41.

[0145] A side drive bracket is provided on the outside of the side drive rubber-coated wheel 31, and the side drive bracket is sleeved on the side travel light bar 22; the side drive rubber-coated wheel 31 is rotatably connected inside the side drive bracket; the side power component is fixed on the side drive bracket; the output shaft of the side power component is fixedly connected to the side drive rubber-coated wheel 31; the end of the side drive bracket away from the side suspension seat 2 abuts against the bottom hanging plate.

[0146] like Figure 19 and Figure 20 As shown, the side drive bracket includes a first side triangular plate 32, a second side triangular plate 33, and three side triangular plate connecting rods 34; the first side triangular plate 32 and the second side triangular plate 33 are placed in parallel, and the ends of the three side triangular plate connecting rods 34 are respectively fixed to the first side triangular plate 32 and the second side triangular plate 33; two side travel light bars 22 pass through the first side triangular plate 32 and the second side triangular plate 33; the two ends of the side drive rubber-coated wheel 31 are rotatably connected to the first side triangular plate 32 and the second side triangular plate 33 respectively; the first side triangular plate 32 is connected to the side travel adjustment unit; the first side triangular plate 32 is connected to the lower detection mechanism.

[0147] The first side triangle 32 and the second side triangle 33 are of the same size, and the lower surfaces of both the first side triangle 32 and the second side triangle 33 are parallel to the axis of the side travel light bar 22. The ends of the three side triangle connecting rods 34 are respectively fixed to the corners of the first side triangle 32 and the second side triangle 33. The axes of the three side triangle connecting rods 34 are parallel to the axis of the side travel light bar 22. The three side triangle connecting rods 34 are sleeved on the side travel light bar 22.

[0148] like Figure 16As shown, the side power assembly includes a side drive motor 35; the side drive motor 35 is mounted on a side drive bracket; the output shaft of the side drive motor 35 is fixedly connected to the side drive rubber-coated wheel 31. The side power assembly also includes a side drive motor 35 fixing flange; one end of the side drive motor 35 fixing flange is mounted on the side drive bracket, and the other end is connected to the side drive motor 35. The side power assembly also includes a side coupling 37; one end of the side coupling 37 is fixedly connected to the output shaft of the side drive motor 35, and the other end is fixedly connected to the side drive rubber-coated wheel 31. The side travel unit also includes: multiple linear bearings; the multiple linear bearings are respectively sleeved between the side first triangular plate 32 and the side travel light bar 22, and between the side second triangular plate 33 and the side travel light bar 22; the multiple linear bearings are respectively fixedly connected to the side first triangular plate 32 and the side second triangular plate 33.

[0149] The side travel assembly also includes: a controller mounting base 38 for mounting the motor control box, such as Figure 16 As shown; the controller mounting base 38 is mounted on the two side travel light bars 22.

[0150] Linear bearings are installed between the first side triangular plate 32 and the second side triangular plate 33 and the side travel light bar 22. The size of the side compression spring 25 is adjusted by rotating the position of the side locking nut 24 to support the weight of the side drive rubber-coated wheel 31 and the side power assembly, while simultaneously providing tension to the lower chain detection ring, enabling the lower chain sensor 39 to overcome its own weight and achieve contact detection with the lower wall surface of the boom 41. The first side triangular plate 32 and the second side triangular plate 33 are fixedly connected by the side triangular plate connecting rod 34. One end of the side drive motor 35 is mounted on the first triangular plate 32 on the side, and the other end is fixed to the side drive motor 35. The main shaft of the side drive motor 35 is connected to the main shaft of the side drive rubber-coated wheel 31 through the side coupling 37. When the side drive motor 35 rotates, it drives the side drive rubber-coated wheel 31 to rotate, thereby realizing the advancement of the side drive rubber-coated wheel 31 along the side wall of the boom 41. The contact force during the movement is achieved by the upper compression spring 5 pushing the side suspension seat 2 to realize the friction force between the side drive rubber-coated wheel 31 and the side wall of the boom 41.

[0151] During detection, the upper chain sensor 8 automatically adheres to the upper wall, side wall, and rounded corners of the boom 41 under its own weight. The lower chain sensor 39 overcomes its own weight and adheres to the lower wall for detection under the action of the side compression spring 25. By adjusting the positions of the upper movable screw 3 and the side movable screw 23, the cross-sectional area of ​​the boom 41 enveloped by the entire detection device 42 can be adjusted to adapt to the changes in the cross-sectional dimensions of different sections of the boom 41. The upper compression spring 5 provides friction for the side drive rubber-coated wheel 31. The detection device 42 can both adjust the cross-section and detect and collect magnetic field signals from each wall surface of the boom 41, achieving full coverage detection of the boom 41.

[0152] The detection device 42 employs magnetic flux leakage detection technology and incorporates the actual cross-sectional dimensions of the crane boom 41. Taking into account the differences in dimensions between different sections of the crane boom 41, the entire detection device 42 is designed to maintain consistency with the cross-sectional shape of the crane boom 41. Simultaneously, the upper, side, and lower detection mechanisms correspond to the various inspected surfaces of the crane boom 41 and operate independently. Furthermore, even when the cross-sectional dimensions of the boom 41 decrease, the upper compression spring 5 and the side compression spring 25 can still maintain contact with the various inspected surfaces of the boom 41 within a certain range, resulting in a wide detection range for the detection device 42. Moreover, the entire detection device 42 operates without external force; the entire detection process is fully automated, enabling the acquisition of magnetic field signals for structural defects in the crane boom 41. This achieves full coverage detection of the entire crane boom 41, preventing missed defects.

[0153] The specific implementation method is as follows: The two upper traveling optical rods 1 on the upper part of the crane boom detection device 42 used for transmission line tower erection are inserted into the connecting holes of the central connecting seat 20 and adjusted for symmetry using set screws. Multiple holes are machined at both ends of the upper traveling optical rods 1. An upper movable screw 3 is sleeved on the upper traveling optical rod 1, and abuts against the upper movable screw 3 through an upper pin that passes through a hole at the end of the upper traveling optical rod 1. The position of the upper movable screw 3 on the upper traveling optical rod 1 is then monitored. When the large-section boom 41 is being detected, the upper movable screw 3 is located at the end of the upper travel guide bar 1. The dimensions of different boom sections 41 of the same model of crane vary greatly. In this embodiment, when the upper wall dimension of the boom 41 changes from large to small and the dimension changes greatly, the upper pin is pulled out and the upper movable screw 3 is moved to the middle of the upper travel guide bar 1 until it is moved to a suitable position. Then the upper pin is inserted into the upper pin hole to realize the adjustment when the cross-sectional dimensions of different boom sections 41 change. The outer side of the straight section of the upper movable screw 3 is machined with external threads. The upper locking nut 4 is threadedly connected to the upper movable screw 3. One end of the upper compression spring 5 abuts against the end face of the upper locking nut 4, and the other end contacts the end face of the side suspension seat 2. Linear bearings are installed in the two holes of the side suspension seat 2. The size of the upper compression spring 5 is adjusted by rotating the position of the upper locking nut 4. The side suspension seat 2 and the linear bearings are connected through the upper travel bearing connecting seat. The linear bearings are installed on the upper first triangular plate 13 and the upper second triangular plate 13. In the inner hole of plate 14, the upper first triangular plate 13 and the upper second triangular plate 14 are fixedly connected by the upper triangular plate connecting rod 15. One end of the upper drive motor 16 fixing flange is installed on the upper first triangular plate 13, and the other end is installed with the upper drive motor 16. The output shaft of the upper drive motor 16 is connected to the main shaft of the upper drive rubber-coated wheel 12 through the upper coupling 18. When the upper drive motor 16 rotates, it drives the upper drive rubber-coated wheel 12 to rotate, thereby realizing the forward movement of the upper drive rubber-coated wheel 12 along the upper wall of the boom 41. As the upper movable screw 3 moves toward the center, the upper drive rubber-coated wheel 12, the upper power assembly, and the upper drive bracket of the upper mechanism move toward the center synchronously under the action of the upper compression spring 5 and multiple linear bearings. When the upper wall surface of the boom 41 changes from wide to narrow, the upper drive rubber-coated wheel 12 can move synchronously to always maintain contact with the upper wall surface of the boom 41. After adjustment, it is fixed by the fixing screw of the upper travel handle.

[0154] A central guide wheel 19 is installed at the end of the central connecting seat 20 along the axis of the boom 41. An upper small guide wheel 11 is installed between the two upper detection fixing seats 9 for guiding and preventing jamming during movement. One end of the upper detection fixing seat 9 is fitted onto the upper traveling light bar 1, and the other end is connected to the upper detection connecting seat 10. The upper chain sensor 8 is installed on the upper detection connecting seat 10. The upper chain sensor 8 adopts a tank chain hinge structure, that is, multiple detection housings are connected in sequence to form a tank chain structure. The detection sensor is installed inside the detection housing. Each detection sensor can rotate relative to the detection housing. During detection, the detection sensor can achieve contact detection with the upper wall of the boom 41 and the rounded corner of the boom 41. The contact force is the self-weight of the detection housing and the detection sensor.

[0155] Under the action of the upper compression spring 5, the side suspension seat 2 moves to the middle of the upper travel light bar 1. The side suspension seat 2 is rotatably connected to the side mounting seat 21 through the suspension rod. The two side travel light bars 22 are respectively fixedly connected to the two ends of the side mounting seat 21. The two side travel light bars 22 are parallel to the axis of the boom 41 and are placed vertically. The control box mounting seat is installed on the upper part of the side travel light bar 22 and is used to install the motor control box. Multiple holes are provided at the lower end of the side travel light bar 22. The side movable screw 23 is sleeved on the side travel light bar 22, and the side pin is inserted into the hole at the lower end of the side travel light bar 22. The side movable screw 23 is limited by the mutual abutment between the side pin and the side movable screw 23. When the number of boom sections 41 changes, the side height of boom 41 will also change. At this time, the position of the side movable screw 23 is adjusted to match the change in the side height of boom 41. One end of the side compression spring 25 abuts against the side locking nut 24, and the other end contacts the end face of the lower hanging plate 26. Linear bearings are installed in the holes of the side first triangular plate 32 and the side second triangular plate 33. The size of the side compression spring 25 is adjusted by rotating the position of the side locking nut 24 to counteract the side power assembly. The lower detection mechanism is tensioned by its own weight, which enables it to overcome its own weight and achieve contact detection with the lower wall of the boom 41. The first side triangle 32 and the second side triangle 33 are fixedly connected by the side triangle connecting rod 34. One end of the side drive motor 35 is mounted on the first side triangle 32, and the other end is mounted on the side drive motor 35. The output shaft of the side drive motor 35 is connected to the side drive rubber-coated wheel 31 through the side coupling 37. When the side drive motor 35 rotates, it drives the side drive rubber-coated wheel 31 to rotate, so that the side drive rubber-coated wheel 31 moves forward along the side of the boom 41. The contact force during the movement is achieved by the upper compression spring 5 pushing the side suspension seat 2 to achieve the friction force between the side drive rubber-coated wheel 31 and the side of the boom 41. The side connecting seat 29 is fixed to the side traveling light bar 22 by a set screw and is equipped with a side small guide wheel 30. The lower part is suspended by a side chain sensor 28 to realize the acquisition of magnetic field signals on the side of the boom 41.

[0156] The two ends of the lower chain sensor 39 are respectively hung in two lower hooks 27, and thus rotatably connected to the side traveling mechanism. Guide wheel mounting seats are fixed to both sides of the lower chain sensor 39 by screws. The guide wheel mounting seats are equipped with lower small guide wheels 40 to reduce frictional resistance during travel and prevent the lower chain sensor 39 from rubbing against the lower wall of the boom 41, thereby realizing the acquisition of magnetic field signals from the lower wall of the boom 41.

[0157] During detection, the upper chain sensor 8 and the side chain sensor 28 automatically adhere to the upper wall, side wall, and rounded corners of the boom 41 under the influence of gravity. The lower chain sensor 39 overcomes its own weight and adheres to the lower wall for detection under the action of the upper compression spring 5 and the side compression spring 25. By adjusting the position of the upper movable screw 3, the size of the entire detection device 42's envelope cross-section can be adjusted to match and adapt to the changes in the cross-sectional size of different boom sections 41. The upper compression spring 5 provides friction for the side drive rubber-coated wheel 31. The detection device 42 can both adjust the cross-section and detect and collect magnetic field signals from various wall surfaces of the boom 41, achieving full coverage detection of the boom 41.

[0158] The detection device 42 provided in this embodiment employs magnetic flux leakage detection technology and incorporates the actual cross-sectional dimensions of the crane boom 41. Considering the differences in dimensions between different sections of the crane boom 41, the entire detection device 42 maintains a consistent cross-sectional shape with the crane boom 41. Simultaneously, the upper, side, and lower detection mechanisms correspond to the respective detection surfaces of the crane boom 41 and are independent of each other. Furthermore, even when the cross-sectional dimensions of the boom 41 decrease, the upper compression spring 5 can still maintain contact with the various detected surfaces of the boom 41 within a certain range, resulting in a wide detection range for the detection device 42. Moreover, the entire detection device 42 requires no external force, and the entire detection process is fully automated, enabling the acquisition of magnetic field signals for structural defects in the crane boom 41. This achieves full-coverage detection of the entire crane boom 41, preventing missed defects.

[0159] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A crane boom diameter-variable full-coverage defect magnetic flux leakage detection device, used to detect structural defects in a crane boom (41), characterized in that, include: Multiple testing institutions and multiple forwarding institutions; The multiple traveling mechanisms are sequentially connected; The plurality of detection mechanisms are respectively connected to the plurality of traveling mechanisms; the plurality of detection mechanisms form a ring structure for collecting magnetic field signals from the outer wall of the boom (41); The multiple detection mechanisms output signals to an external signal receiving device based on the collected magnetic field signals; the multiple traveling mechanisms adjust the distance between the multiple detection mechanisms based on the size of the boom (41); The plurality of traveling mechanisms include an upper traveling mechanism and two side traveling mechanisms; The upper traveling mechanism includes: an upper mounting assembly with a strip-like structure and upper adjusting assemblies disposed at both ends of the upper mounting assembly; the side traveling mechanism includes: a side mounting assembly and a side adjusting assembly; the side adjusting assembly includes side connecting members and side elastic members both sleeved on the side mounting assembly; the plurality of detection mechanisms include: an upper detection mechanism, a side detection mechanism, and a lower detection mechanism, all with a chain-like structure; the middle part of the upper detection mechanism is connected to the upper mounting assembly; the side detection mechanisms are respectively connected to the side mounting assemblies; the two ends of the lower detection mechanism are respectively connected to the side connecting members; The upper adjustment assembly is an elastic structure; the two side traveling mechanisms are respectively connected to both sides of the upper traveling mechanism through the two upper adjustment assemblies; the side mounting assembly is a strip-shaped structure; the side adjustment assembly is an elastic structure; one end of the side mounting assembly is connected to the upper adjustment assembly, and the other end is connected to the side adjustment assembly; the plurality of detection mechanisms are respectively connected to the upper mounting assembly, the two side mounting assemblies, and the two side adjustment assemblies; one end of the side elastic member is fixed to the end of the side mounting assembly away from the upper adjustment assembly, and the other end is abutted against the side connecting member; the side connecting member is slidably connected to the side mounting assembly and is disposed on the side of the side elastic member close to the upper adjustment assembly; the side connecting member and the side elastic member abut against each other.

2. The crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 1, characterized in that, The upper adjustment assembly includes: an upper elastic element, an upper connecting element, and an upper fixing element; The upper elastic member, the upper connecting member, and the upper fixing member are arranged in sequence; Both the upper elastic member and the upper connecting member are movably connected to the upper mounting assembly; The upper elastic member and the upper connecting member are elastically connected; The upper fixing component is detachably fixed to the upper mounting assembly; The upper fixing member is fixedly connected to the upper connecting member; The two side travel mechanisms are respectively mounted on the two upper connecting parts.

3. The crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 2, characterized in that, The upper elastic element includes an upper movable screw (3), an upper locking nut (4), and an upper compression spring (5) all sleeved on the upper mounting assembly; The upper movable screw (3) is sleeved on the upper mounting assembly; The upper movable screw (3) and the upper locking nut (4) are threaded together; The upper compression spring (5) is sleeved on the upper movable screw (3), and its two ends abut against the upper locking nut (4) and the upper connecting piece, respectively.

4. The crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 3, characterized in that, The upper elastic element also includes an upper pin; The upper mounting assembly has multiple holes that are adapted to the upper pin. The upper movable screw (3) has a hole that matches the upper pin; The upper pin passes through the hole on the upper mounting assembly and the hole on the upper movable screw (3).

5. A crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 2, characterized in that, The upper fixing component includes an upper bearing connecting seat (6) and an upper set screw (7); The upper bearing connecting seat (6) is slidably connected to the upper mounting assembly; One end of the upper bearing connecting seat (6) is connected to the upper connecting member; The upper set screw (7) is threadedly connected to the upper bearing connecting seat (6), and the upper set screw (7) passes through the upper bearing connecting seat (6) and abuts against the upper mounting assembly.

6. The crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 1, characterized in that, The side elastic element includes a side movable screw (23), a side locking nut (24), and a side compression spring (25), all of which are sleeved on the side mounting assembly; The side movable screw (23) is sleeved on the side mounting assembly; The side movable screw (23) and the side locking nut (24) are threaded together; The side compression spring (25) is sleeved on the side movable screw (23), and its two ends abut against the side locking nut (24) and the side connector, respectively.

7. A crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 6, characterized in that, The side elastic element also includes a side pin; The side mounting assembly has multiple holes that are adapted to the side pin. The side movable screw (23) has a hole that matches the side pin; The side pin passes through the hole on the side mounting assembly and the hole on the side movable screw (23).

8. A crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 6, characterized in that, The side connector includes a lower hanging plate (26) with a plate-like structure; The lower mounting plate (26) is movably connected to the side mounting assembly; The lower hanging plate (26) abuts against the side compression spring (25); The plurality of testing mechanisms are respectively connected to the upper mounting assembly, the two side mounting assemblies and the two lower mounting plates (26).

9. A crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 1, characterized in that, The upper detection mechanism includes two upper chain sensors (8); One end of each of the two upper chain sensors (8) is connected; The two upper chain sensors (8) and the traveling mechanism are arranged along the extension direction of the boom; The two upper chain sensors (8) are installed in the middle of the traveling mechanism.

10. A crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 9, characterized in that, The upper detection mechanism also includes an upper detection fixing seat (9) which is plate-shaped, two upper detection connecting seats (10) and an upper guide; The upper detection fixing seat (9) is fixed to the middle of the upper mounting assembly; The two upper detection connecting seats (10) are respectively installed on both sides of the upper detection fixing seat (9); The two upper chain sensors (8) are rotatably connected to the two upper detection connecting seats (10) respectively; The upper guide is rotatably connected between the two upper detection fixing seats (9).

11. A crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 1, characterized in that, The detection mechanism is a chain sensor.

12. A crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 11, characterized in that, The chain sensor includes multiple detection housings and multiple detection sensors; Each of the aforementioned detection housings is rotatably connected to at least one detection sensor; The multiple detection housings are rotated and connected in sequence.

13. A crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 11, characterized in that, The side detection mechanism includes a side chain sensor (28), a side connecting seat (29) with a plate-like structure, and a side guide; One end of the side connecting seat (29) is mounted on the traveling mechanism, and the other end is fixedly connected to the side chain sensor (28); The side chain sensor (28) and the traveling mechanism are arranged along the extension direction of the boom; The side guide is rotatably connected to the end of the side connecting seat (29) away from the traveling mechanism.

14. A crane boom diameter-changing full-coverage defect magnetic flux leakage detection device according to claim 11, characterized in that, The lower detection mechanism includes a lower chain sensor (39) and multiple lower small guide wheels (40); The two ends of the lower chain sensor (39) are respectively connected to the two traveling mechanisms; The plurality of lower guide wheels (40) are respectively spaced apart on both sides of the lower chain sensor (39).

15. A crane boom diameter-variable full-coverage defect magnetic flux leakage detection device according to claim 1, characterized in that, Both the upper traveling mechanism and the side traveling mechanism include rollers and a power assembly; The output shaft of the power component is fixedly connected to the roller; The plurality of rollers are respectively rotatably connected to the upper mounting assembly and the side mounting assembly; The plurality of power components are respectively fixed to the upper mounting component and the side mounting component.

Images