A crane jib structure fatigue crack detection device

Abstract

The utility model relates to a crane detection technical field especially relates to a crane jib structure fatigue crack detection device. Its technical scheme includes: the outside detection frame, the inside of outside detection frame is wrapped and has the wrapping positioning component, the bottom of wrapping positioning component is installed and takes the positioning component. The utility model discloses through the meshing of wheel tooth block and wheel tooth holding block and drives wheel tooth holding block to move along the positioning slide along the positioning rod, and wheel tooth holding block drives upper wrapping frame and lower wrapping frame to adhere to the outside of crane jib structure through the positioning type clamping plate, and then completes the relative clamping of crane jib structure, so that it is convenient to carry out the corresponding clamping according to the diameter change of crane jib structure's pole body, and then improves the detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of crane testing technology, and in particular to a device for detecting fatigue cracks in crane boom structures. Background Technology

[0002] With the acceleration of the global energy transition, wind power, as one of the core directions of clean energy, has seen continuous growth in installed capacity. The installation and maintenance of wind power equipment (such as wind turbine towers, blades, nacelles, etc.) are highly dependent on large lifting machinery. Among them, wind power crawler cranes have become key equipment for wind farm construction and operation due to their high lifting capacity, large lifting height, and strong adaptability to complex terrain.

[0003] The core load-bearing structure of a wind turbine lifting crawler crane is the boom structure. The boom structure is subjected to dynamic loads (such as alternating stress during lifting, luffing, and slewing), environmental loads (such as wind loads and low-temperature impacts), and fatigue loads over a long period of time. It is prone to fatigue cracks in stress concentration areas (such as the connection node between the boom root and the turntable, the weld between the luffing plate and the boom, and the abrupt change in cross section). Therefore, fatigue crack detection of the crane boom structure is very important.

[0004] The publicly available patent document CN216013239U discloses a fatigue crack detection device for a crane boom structure. By mounting two fixed components onto the crane boom in a clamping manner, it achieves non-destructive installation, provides high installation stability for the sound sensor, offers strong protection, and has a long service life. The groove on the clamping component stores coupling agent for contact with the coupling end of the sound sensor, which helps improve the detection accuracy of the device. This device is rationally designed, simple in structure, easy to install, provides good protection, has a long service life, and improves detection accuracy, making it suitable for large-scale deployment.

[0005] While the above devices improve the detection accuracy by storing coupling agent in the groove on the clamping component, the crane boom has multiple detection points. Depending on the diameter of the boom, the above devices cannot perform reasonable wrapping detection based on the actual boom detection points, resulting in poor detection of fatigue cracks in the crane boom structure.

[0006] Therefore, this application proposes a fatigue crack detection device for crane boom structure. Utility Model Content

[0007] The purpose of this invention is to address the problem in the background art that existing devices cannot perform reasonable wrapping inspection based on the actual detection points of the boom, resulting in poor detection of fatigue cracks in the crane boom structure. This invention proposes a fatigue crack detection device for crane boom structures.

[0008] The technical solution of this utility model is: a fatigue crack detection device for a crane boom structure, including an external detection frame, an internally wrapped positioning component, and a clamping positioning component installed at the bottom of the external detection frame. The package positioning assembly includes a lower package frame and an upper package frame. The lower package frame is slidably mounted on one side of the upper package frame. Both the lower and upper package frames have toothed clamping blocks threadedly installed on their outer sides via positioning plates. The clamping and positioning assembly includes a triangular positioning frame slidably mounted on the bottom of the toothed clamping block. A toothed block is rotatably mounted on the top of the triangular positioning frame. The toothed block and the toothed clamping block are meshed together. An auxiliary hinge rod is fixedly mounted on the side of the toothed block away from the toothed clamping block. A two-way hinge rod is hinged to one side of the auxiliary hinge rod. A first positioning locking rod is hinged to the side of the two-way hinge rod away from the auxiliary hinge rod. A hydraulic pump is fixedly mounted on the top of the triangular positioning frame. A positioning rod is fixedly mounted on the output end of the hydraulic pump. The positioning rod and the first positioning locking rod are fixedly mounted together.

[0009] Optionally, a positioning slide rod is fixedly installed on the top of the triangular positioning frame, and the gear tooth clamping block is slidably installed on the top of the positioning slide rod.

[0010] Optionally, the external detection frame includes a first guide plate, and the surface of the first guide plate has multiple bolt positioning holes.

[0011] Optionally, the external detection frame further includes a second guide plate, the surface of which has a number of storage grooves consistent with the number of the second guide plate.

[0012] Optionally, the storage groove is located on the second guide plate in an up-down arrangement, and the second guide plate is slidably installed on the outside of the first guide plate through the storage groove.

[0013] Optionally, a first sound sensor is fixedly installed on the side of the first guide plate facing the lower package frame, and a second sound sensor is fixedly installed on the side of the second guide plate facing the upper package frame.

[0014] Optionally, the lower package rack and the upper package rack are arranged opposite each other in an alternating manner, and both the lower package rack and the upper package rack have storage holes inside, with coupling agent filling components installed inside the storage holes.

[0015] Optionally, a first auxiliary spring is fixedly installed on one side of the lower parcel frame extending into the interior of the upper parcel frame, and the side of the first auxiliary spring away from the lower parcel frame is fixedly installed inside the upper parcel frame.

[0016] Optionally, the first guide plate is slidably installed inside the gear tooth clamping block, and a second auxiliary spring is fixedly installed at the connection between the gear tooth clamping block and the triangular positioning frame.

[0017] Optionally, the first sound sensor and the second sound sensor are adapted to the storage hole and are configured in a plug-in state.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects: 1. The toothed block, through meshing with the toothed clamping block, drives the toothed clamping block to move along the positioning slide bar toward the positioning rod. The toothed clamping block, through the positioning clamping plate, drives the upper and lower wrapping frames to fit against the outside of the crane boom structure, thereby completing the relative clamping of the crane boom structure. This facilitates corresponding clamping according to the change of the boom diameter of the crane boom structure, thereby improving the detection efficiency. 2. Since there are many components or textures on the surface of the crane boom structure, the first and second sound sensors can be better attached to the outside of the crane boom structure by the cross-shaped interchange of the first and second guide plates, thereby better detecting the crane boom structure. Attached Figure Description

[0019] Figure 1 A schematic diagram of a fatigue crack detection device for a crane boom structure is provided. Figure 2 Give Figure 1 Enlarged view of region A in the middle; Figure 3 A schematic diagram of the package positioning component of this utility model is provided; Figure 4 A schematic diagram of the external detection frame of this utility model is provided.

[0020] Reference numerals: 1. External detection frame; 101. First guide plate; 102. Second guide plate; 103. Bolt positioning hole; 104. Storage groove; 2. Wrapping positioning assembly; 201. Lower wrapping frame; 202. Upper wrapping frame; 203. Positioning clamping plate; 204. Storage hole; 3. Clamping positioning assembly; 301. Triangular positioning frame; 302. Positioning slide rod; 303. Hydraulic pump; 304. Positioning rod; 305. First positioning locking rod; 306. Two-way hinge rod; 307. Auxiliary hinge rod; 308. Gear tooth block; 309. Gear tooth clamping block. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0022] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0023] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] like Figure 1 and Figure 4 As shown, the present invention proposes a fatigue crack detection device for a crane boom structure, including an external detection frame 1, an internal wrapping positioning component 2, and a clamping positioning component 3 installed at the bottom of the wrapping positioning component 2. The package positioning assembly 2 includes a lower package frame 201 and an upper package frame 202. The lower package frame 201 is slidably mounted on one side of the upper package frame 202. The outer sides of both the lower package frame 201 and the upper package frame 202 are threadedly fitted with toothed clamping blocks 309 via positioning plates 203. The clamping and positioning assembly 3 includes a triangular positioning frame 301 slidably mounted on the bottom of the toothed clamping block 309. A toothed block 308 is rotatably mounted on the top of the triangular positioning frame 301, and the toothed block 308 is meshed with the toothed clamping block 309. An auxiliary hinge rod 307 is fixedly mounted on the side of the toothed block 308 away from the toothed clamping block 309. A two-way hinge rod 306 is hinged to one side of the auxiliary hinge rod 307. A first positioning engagement rod 305 is hinged to the side of the two-way hinge rod 306 away from the auxiliary hinge rod 307. A hydraulic pump 303 is fixedly mounted on the top of the triangular positioning frame 301. A positioning rod 304 is fixedly mounted on the output end of the hydraulic pump 303. The positioning rod 304 engages with the first positioning engagement rod 305. The locking rod 305 is fixedly installed. The top of the triangular positioning frame 301 is fixedly installed with a positioning slide rod 302. The gear tooth clamping block 309 is slidably installed on the top of the positioning slide rod 302. The first guide plate 101 is slidably installed inside the gear tooth clamping block 309. A second auxiliary spring is fixedly installed at the connection between the gear tooth clamping block 309 and the triangular positioning frame 301. The specific process of the hydraulic pump 303 and the positioning rod 304 is as follows: the hydraulic pump 303 provides power, and the hydraulic oil flow inside the hydraulic pump 303 is controlled by the reversing valve mounted on the hydraulic pump 303, thereby realizing the extension and forward or retraction and backward of the piston. That is, the positioning rod 304 moves forward or backward along the first guide plate 101. When performing fatigue crack detection on the crane boom structure, based on the diameter of different positions on the boom body, the crane boom structure is first placed inside the enclosure positioning component 2 and the external detection frame 1. At this time, the hydraulic pump 303 drives the positioning rod 304 to move backward. The positioning rod 304 drives the bidirectional hinge rod 306 to move downward synchronously through the first positioning locking rod 305. Since the gear tooth block 308 is positioned at the top of the triangular positioning frame 301, the gear tooth block 308 can only rotate along the triangular positioning frame 301. As a result, the bidirectional hinge rod 306 deflects counterclockwise, and the auxiliary... The auxiliary hinge rod 307 is driven by the deflection force of the bidirectional hinge rod 306 to rotate the toothed block 308 clockwise. The toothed block 308, through meshing with the toothed clamping block 309, drives the toothed clamping block 309 to move along the positioning slide rod 302 toward the positioning rod 304. The toothed clamping block 309, through the positioning clamping plate 203, drives the upper wrapping frame 202 and the lower wrapping frame 201 to fit against the outside of the crane boom structure, thereby completing the relative clamping of the crane boom structure. This facilitates corresponding clamping according to the change of the boom diameter of the crane boom structure, thereby improving the detection efficiency. Compared to traditional telescopic structures, the retractable relationship between the upper and lower wrapping frames 202 and 201 prevents parts of the crane boom structure from going undetected. Traditional telescopic mechanisms leave gaps during telescopic movement, which are undetectable areas. However, since the detection area of ​​the crane boom structure is relatively large, the upper and lower wrapping frames 202 and 201 form an upper and lower detection area, allowing the detection of areas within the relative plane of the crane boom structure, thereby improving the detection effect.

[0027] like Figures 1-4 As shown, the external detection frame 1 includes a first guide plate 101, with multiple bolt positioning holes 103 on its surface. The external detection frame 1 also includes a second guide plate 102, with a number of receiving grooves 104 on its surface, matching the number of the second guide plate 102. The receiving grooves 104 are positioned one above the other on the second guide plate 102, allowing the second guide plate 102 to slide on the outside of the first guide plate 101 via the receiving grooves 104. A first sound sensor is fixedly mounted on the side of the first guide plate 101 facing the lower wrapping frame 201, and a second sound sensor is fixedly mounted on the side of the second guide plate 102 facing the upper wrapping frame 202. This device includes an FPGA control system, a DA conversion system, sensor components, and a signal acquisition and analysis component. The sensor components include a first sound sensor and a second sound sensor, all of which are existing technologies and will not be described in detail here. The focus of this invention is to perform corresponding detection based on changes in the crane boom structure.

[0028] like Figure 2 and Figure 3As shown, the lower package frame 201 and the upper package frame 202 are arranged opposite each other in a staggered manner. Both the lower and upper package frames 201 and 202 have storage holes 204 inside. A coupling agent filling assembly is installed inside the storage hole 204. A first auxiliary spring is fixedly installed on one side of the lower package frame 201 extending into the upper package frame 202. The side of the first auxiliary spring away from the lower package frame 201 is fixedly installed inside the upper package frame 202. The first sound sensor and the second sound sensor are adapted to the storage hole 204 and are arranged in a plug-in state. After the lower package rack 201 and upper package rack 202 clamp the crane boom structure, the operator manually pushes the second guide plate 102, causing the second sound sensor on the side of the second guide plate 102 facing the upper package rack 202 and lower package rack 201 to pass through the storage hole 204 and contact the crane boom structure. Meanwhile, the coupling agent filling assembly contacts the first sound sensor through its own pressure sensor, and under pressure, the coupling agent covers the first sound sensor through the annular nozzle hole. This is a publicly available technology and will not be described in further detail. In detail, after the second guide plate 102 is adjusted, the first guide plate 101 slides and adjusts along the second guide plate 102. Since the first guide plate 101 moves with the gear clamping block 309, it is now relatively close to the outside of the crane boom structure. After the first guide plate 101 and the second guide plate 102 are adjusted, the operator installs the positioning screw into the bolt positioning hole 103, that is, the screw passes through both sides of the bolt positioning hole 103, and installs nuts on each side, thus positioning the screw in the bolt positioning hole 103. Positioning is achieved by using a screw whose height is greater than the width of the receiving groove 104. This screw then limits the second guide plate 102 and the first guide plate 101, thus positioning the first guide plate 101 and the second guide plate 102. Since the surface of the crane boom structure has many components or textures, the first guide plate 101 and the second guide plate 102 are cross-shaped and interchanged, allowing the first sound sensor and the second sound sensor to fit well against the outside of the crane boom structure, thereby enabling better detection of the crane boom structure.

[0029] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A fatigue crack detection device for a crane boom structure, comprising an external detection frame (1), characterized in that: The external detection frame (1) is internally wrapped with a package positioning component (2), and a clamping positioning component (3) is installed at the bottom of the package positioning component (2). The package positioning component (2) includes a lower package frame (201) and an upper package frame (202). The lower package frame (201) is slidably installed on one side of the upper package frame (202). The outer sides of both the lower package frame (201) and the upper package frame (202) are threaded with toothed clamping blocks (309) through positioning plates (203). The clamping and positioning assembly (3) includes a triangular positioning frame (301) slidably mounted on the bottom of the toothed clamping block (309). A toothed block (308) is rotatably mounted on the top of the triangular positioning frame (301). The toothed block (308) and the toothed clamping block (309) are meshed together. An auxiliary hinge rod (307) is fixedly mounted on the side of the toothed block (308) away from the toothed clamping block (309). A two-way hinge rod (306) is hinged on one side of the auxiliary hinge rod (307). A first positioning locking rod (305) is hinged on the side of the two-way hinge rod (306) away from the auxiliary hinge rod (307). A hydraulic pump (303) is fixedly mounted on the top of the triangular positioning frame (301). A positioning rod (304) is fixedly mounted on the output end of the hydraulic pump (303). The positioning rod (304) and the first positioning locking rod (305) are fixedly mounted together.

2. The fatigue crack detection device for a crane boom structure according to claim 1, characterized in that, The top of the triangular positioning frame (301) is fixedly installed with a positioning slide rod (302), and the gear tooth clamping block (309) is slidably installed on the top of the positioning slide rod (302).

3. The fatigue crack detection device for a crane boom structure according to claim 1, characterized in that, The external detection frame (1) includes a first guide plate (101), and the surface of the first guide plate (101) is provided with a plurality of bolt positioning holes (103).

4. The fatigue crack detection device for a crane boom structure according to claim 3, characterized in that, The external detection frame (1) also includes a second guide plate (102), and the surface of the second guide plate (102) is provided with a number of storage grooves (104) consistent with the number of the second guide plate (102).

5. The fatigue crack detection device for a crane boom structure according to claim 4, characterized in that, The storage groove (104) is located on the second guide plate (102) in an up-down arrangement. The second guide plate (102) is slidably installed on the outside of the first guide plate (101) through the storage groove (104).

6. The fatigue crack detection device for a crane boom structure according to claim 5, characterized in that, A first sound sensor is fixedly installed on the side of the first guide plate (101) facing the lower package rack (201), and a second sound sensor is fixedly installed on the side of the second guide plate (102) facing the upper package rack (202).

7. The fatigue crack detection device for a crane boom structure according to claim 6, characterized in that, The lower package rack (201) and the upper package rack (202) are arranged opposite each other in an alternating manner. Both the lower package rack (201) and the upper package rack (202) have storage holes (204) inside, and the storage holes (204) are provided with coupling agent filling components.

8. The fatigue crack detection device for a crane boom structure according to claim 7, characterized in that, A first auxiliary spring is fixedly installed on one side of the lower parcel frame (201) extending into the upper parcel frame (202), and the side of the first auxiliary spring away from the lower parcel frame (201) is fixedly installed inside the upper parcel frame (202).

9. A fatigue crack detection device for a crane boom structure according to claim 3, characterized in that, The first guide plate (101) is slidably installed inside the toothed clamping block (309), and a second auxiliary spring is fixedly installed at the connection between the toothed clamping block (309) and the triangular positioning frame (301).

10. A fatigue crack detection device for a crane boom structure according to claim 7, characterized in that, The first sound sensor and the second sound sensor are adapted to the storage hole (204) and are set in a plug-in state.

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