A steel box girder slab weld quality detection device

Abstract

The application discloses a kind of steel box girder beam plate weld quality detection device, including detection host, detection support and detection probe assembly, the detection support includes moving frame, telescopic mechanism, moving wheel mechanism and operating lever;The moving wheel mechanism is set to the moving frame bottom, the telescopic mechanism includes sleeve assembly being telescopically arranged on the moving frame, the sleeve assembly includes mutually sleeved outer sleeve and inner sleeve, the detection probe assembly is installed in the inner side of the inner sleeve for detecting weld quality, the operating lever is connected to the outer side of the outer sleeve for pushing the moving frame travel and the telescopic action of telescopic mechanism.The application is set by the structure of detection support, when carrying out weld detection, can utilize operating lever to push movement and execute detection operation, without operating personnel to bend down to carry out weld detection operation, structure design is convenient to disassemble and assemble, guarantee smooth travel, effectively improve detection efficiency, quality and operation convenience.

Description

Technical Field

[0001] This invention relates to the field of welding inspection equipment technology, and in particular to a device for inspecting the quality of weld seams in steel box girders. Background Technology

[0002] Steel box girders are a common structure in bridge engineering, constructed from a large number of welded steel plates. To ensure that the structural strength and quality of the steel box girders meet design requirements, post-weld quality inspection of the weld seams is typically required. Current technology generally employs ultrasonic flaw detectors for weld seam inspection. These instruments are often handheld, requiring the inspector to hold the probe to the weld seam. For large steel box girder structures, the sheer number of steel plates and the complex structural design result in a large workload for inspection. Furthermore, before inspection, the weld surface is likely to be contaminated with dust and other impurities, which can obstruct the ultrasonic waves generated by the flaw detector, thus affecting the accuracy of the inspection. Ordinary weld seam inspection devices are insufficient to meet the quality inspection needs of these steel box girders; therefore, a new weld seam inspection device for steel box girders is needed to address these issues. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a steel box girder weld quality inspection device, comprising an inspection host, an inspection bracket, and an inspection probe assembly, wherein the inspection probe assembly is electrically connected to the inspection host via a lead wire;

[0004] The inspection bracket includes a movable frame, a telescopic mechanism, a movable wheel mechanism, and an operating lever; the movable wheel mechanism is located at the bottom of the movable frame, the telescopic mechanism includes a sleeve assembly telescopically mounted on the movable frame, the sleeve assembly includes an outer sleeve and an inner sleeve that are nested together, the inspection probe assembly is installed inside the inner sleeve for detecting weld quality, and the operating lever is connected to the outside of the outer sleeve for pushing the movable frame forward and for the telescopic mechanism to extend and retract.

[0005] As a further illustration of the present invention, the telescopic mechanism also includes a mounting plate and a return spring; the outer sleeve is mounted on the mounting plate and threadedly connected to the inner sleeve; the operating rod is hinged to the outer sleeve; one end of the return spring is connected to the movable frame, and the other end is connected to the mounting plate.

[0006] Furthermore, a flexible fastening sleeve is provided between the outer sleeve and the inner sleeve, and the radial movement of the flexible fastening sleeve is driven by the rotational movement of the outer sleeve and the inner sleeve.

[0007] Furthermore, a driving ramp is provided on the inner side of the outer sleeve, and the flexible fastening sleeve is positioned opposite the driving ramp, thereby driving the radial movement of the flexible fastening sleeve through the driving ramp.

[0008] Furthermore, each of the four corners of the bottom of the detection bracket is fixedly connected with a movable wheel.

[0009] Furthermore, the mounting plate is provided with sliding guide rods, and there are two sets of sliding guide rods, which are symmetrically arranged along the central axis of the telescopic mechanism.

[0010] Furthermore, a protective cover is provided at the lower part of the movable frame, and the lower side of the protective cover is flush with the lower end of the movable wheel.

[0011] Furthermore, the detection bracket is provided with an air blowing assembly, which includes a piston assembly, a linkage drive assembly, and an air blowing nozzle. The air blowing nozzle is connected to the piston assembly, and the linkage drive assembly drives the piston assembly to move.

[0012] Furthermore, the linkage drive assembly includes a drive cam, and the piston assembly includes a transmission sector plate, a piston push rod, and a piston. The drive cam is connected to the moving wheel via a rotating shaft and rotates synchronously. The drive cam is drivenly connected to the transmission sector plate. The piston push rod is connected to the transmission sector plate and the piston at both ends, respectively. The piston is driven to reciprocate by the piston push rod connected to the transmission sector plate to blow air.

[0013] The beneficial effects of this invention are:

[0014] This invention, through the structural design of the detection bracket, allows for the movement and execution of detection operations using an operating rod during weld inspection, eliminating the need for operators to bend over. The structural design facilitates easy assembly and disassembly, ensuring smooth movement and effectively improving inspection efficiency, quality, and ease of operation. It is compatible with various existing weld inspection instruments, offering wide applicability and meeting diverse weld inspection needs. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the steel box girder weld quality inspection device according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the outer sleeve and inner sleeve structure according to an embodiment of the present invention;

[0017] Figure 3 This is a structural diagram of the piston assembly according to an embodiment of the present invention.

[0018] Reference numerals: 1. Detection probe assembly; 2. Signal lead; 3. Moving frame; 4. Operating lever; 5. Outer sleeve; 6. Inner sleeve; 7. Mounting plate; 8. Return spring; 9. Flexible fastening sleeve; 10. Elastic protrusion; 11. Driving inclined surface; 12. Moving wheel; 13. Sliding guide rod; 14. Protective cover; 15. Air nozzle; 16. Driving cam; 17. Transmission sector plate; 18. Piston push rod; 19. Piston. Detailed Implementation

[0019] Example:

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0022] As attached Figure 1-3 As shown in the figure, a steel box girder weld quality inspection device of this embodiment includes an inspection host, an inspection bracket, and an inspection probe assembly 1. The inspection probe assembly 1 is electrically connected to the inspection host via a signal lead 2. The inspection bracket includes a movable frame 3, a telescopic mechanism, a movable wheel mechanism, and an operating rod 4. The movable wheel mechanism is located at the bottom of the movable frame 3. The telescopic mechanism includes a sleeve assembly telescopically mounted on the movable frame 3. The sleeve assembly consists of an outer sleeve 5 and an inner sleeve 6 that are nested together. The inspection probe assembly 1 is installed and fixed inside the inner sleeve 6 for detecting weld quality. The operating rod 4 is connected to the outside of the outer sleeve 5 for pushing the movable frame 3 forward and for the telescopic mechanism to extend and retract. This invention, through the structural design of the inspection bracket, allows for the use of the operating rod 4 to push the movement and perform the inspection operation during weld inspection, eliminating the need for operators to bend over. The structural design facilitates disassembly and assembly, ensures stable movement, and effectively improves inspection efficiency, quality, and operational convenience. In practical applications, the detection probe assembly 1 described in this embodiment is not limited to a specific type of probe. That is, the detection bracket can be used with different existing weld inspection instruments. The probe of the weld inspection instrument is assembled and fixed in the inner sleeve 6 so that it can perform weld inspection. It has wide applicability and can meet different weld inspection needs.

[0023] For details, please see the appendix. Figure 1As shown, the telescopic mechanism in this embodiment also includes a mounting plate 7 and a return spring 8; the outer sleeve 5 is mounted on the mounting plate 7 and threadedly connected to the inner sleeve 6; the operating rod 4 is hinged to the outer sleeve 5; one end of the return spring 8 is connected to the movable frame 3, and the other end is connected to the mounting plate 7. During use, the detection bracket is placed on the welded steel box girder plate. On the one hand, the operating rod 4 can be used to push the detection bracket along the weld seam between the steel box girder plates; on the other hand, the operating rod 4 can be used to press the telescopic mechanism, causing the probe of the detection probe assembly 1 to move downwards to contact the surface to be detected, in order to perform weld seam detection.

[0024] In a preferred embodiment, a flexible fastening sleeve 9 is provided between the outer sleeve 5 and the inner sleeve 6. The radial movement of the flexible fastening sleeve 9 is driven by the rotational movement of the outer sleeve 5 and the inner sleeve 6. The flexible fastening sleeve 9 can be made of a material with good elasticity and wear resistance, such as silicone, rubber, or polyurethane. It has several strip-shaped or annular elastic protrusions 10 inside, which can undergo elastic deformation when subjected to radial force, thereby improving the fastening effect with the detection probe assembly 1. The radial movement of the flexible fastening sleeve 9 is driven by the rotational movement of the outer sleeve 5 and the inner sleeve 6. Specifically, when the outer sleeve 5 rotates relative to the inner sleeve 6 in a forward or reverse direction, the flexible fastening sleeve 9 expands outward or contracts inward as a whole, thereby achieving adjustable fastening of the detection probe assembly 1 inside the inner sleeve 6. During the radial movement of the flexible fastening sleeve 9, the flexible fastening sleeve 9 can uniformly transmit the fastening force, avoid local stress concentration, and its flexible characteristics can adapt to the fastening of probe structures of different sizes, ensuring a stable and reliable fastening effect. Moreover, after stopping rotation, it can maintain the set radial position by its own elasticity to prevent loosening.

[0025] As one possible implementation method, see Appendix Figure 2As shown in this embodiment, a driving inclined surface 11 is provided on the inner side of the outer sleeve 5, and the flexible fastening sleeve 9 is positioned opposite the driving inclined surface 11. The driving inclined surface 11 drives the radial movement of the flexible fastening sleeve 9. When the flexible fastening sleeve is driven radially by the driving inclined surface 11, as the outer sleeve 5 moves axially, the driving inclined surface 11 gradually causes the inner wall of the flexible fastening sleeve 9 to contract inward, reducing its diameter and thus clamping and fixing the internal detection probe assembly 1. Conversely, when the outer sleeve 5 moves in the opposite direction, the flexible fastening sleeve 9 expands outward under its own material elasticity, increasing its diameter, which facilitates the insertion or removal of the detection probe assembly 1. Throughout the driving process, the radial movement of the flexible fastening sleeve 9 is smooth and controllable, and it can automatically adjust the clamping force under the action of the driving inclined surface 11 to ensure reliable fastening and fixing of detection probe assemblies 1 of different sizes, while avoiding damage to the detection probe assembly 1 due to excessive clamping force.

[0026] In this embodiment, each of the four corners of the bottom of the detection bracket is fixedly connected with a movable wheel 12 to ensure that the device moves and detects smoothly.

[0027] In this embodiment, the mounting plate 7 is provided with sliding guide rods 13. There are two sets of sliding guide rods 13 in this embodiment, which are symmetrically arranged along the central axis of the telescopic mechanism to ensure that a uniform and stable guiding force can be provided during the telescopic process, thereby improving stability and durability.

[0028] In this embodiment, a protective cover 14 is provided at the lower part of the movable frame 3. The protective cover 14 is fitted over the outside of the detection probe assembly 1 to protect it. The lower side of the protective cover 14 is flush with the lower end of the movable wheel 12. Specifically, the bottom plane of the protective cover 14 is at the same level as the lowest edge of the movable wheel 12. When the movable frame 3 moves smoothly, the protective cover 14 is in contact with the ground but does not make contact with the ground, so as to effectively block foreign objects that may be present on the outside of the protective cover 14, and prevent foreign objects from entering and affecting the detection or even causing damage to the detection probe assembly 1.

[0029] In this embodiment, to further improve the protection effect and ensure the detection quality, an air blowing assembly is provided on the detection bracket for cleaning the weld seam of the steel box girder below the probe with air. For details, please refer to the appendix. Figure 3As shown, the air blowing assembly in this embodiment includes a piston assembly, a linkage drive assembly, and an air blowing nozzle 15. The air blowing nozzle 15 is connected to the piston assembly and drives the piston assembly to move through the linkage drive assembly. In this embodiment, the linkage drive assembly includes a drive cam 16, and the piston assembly includes a transmission sector plate 17, a piston push rod 18, and a piston 19. The drive cam 16 is connected to the moving wheel 12 via a rotating shaft and rotates synchronously. The drive cam 16 is drive-connected to the transmission sector plate 17. The two ends of the piston push rod 18 are respectively connected to the transmission sector plate 17 and the piston 19. The piston push rod 18, connected to the transmission sector plate 17, drives the piston 19 to reciprocate to blow air. During the detection movement of the detection bracket, the moving wheel 12 drives the drive cam 16 to rotate. The drive cam 16 is in contact with the transmission sector plate 17 for transmission. The irregular shape of the drive cam 16 forces the transmission sector plate 17 to move up and down reciprocally, thereby driving the connected piston push rod 18 to move up and down reciprocally. The reciprocating motion of the piston push rod 18 further drives the piston 19 to move periodically along the inside of the piston cylinder. During the compression motion of the piston 19, the high-pressure gas located above the piston 19 in the piston cylinder is compressed and rapidly forced into the connecting air pipe. Subsequently, this high-pressure gas flows through the connecting air pipe to the air nozzle 15 pointing downwards towards the ultrasonic flaw detector head and is ejected. In this embodiment, the air nozzle 15 is aligned with the lower side of the protective cover 14. During the moving detection process, it is driven by transmission to intermittently blow air onto the weld seam to be inspected on the steel box girder, effectively blowing away dust, iron filings, and other impurities from the weld surface, achieving a blowing and cleaning effect on the weld seam of the steel box girder and ensuring the quality of weld seam inspection by the device. The linkage structure between the blowing assembly and the inspection bracket not only improves the accuracy of weld seam inspection but also achieves efficient linkage between moving inspection and cleaning operations, reducing workload and improving overall work efficiency. It is particularly suitable for high-efficiency and high-quality inspection of weld seams on large steel box girders.

[0030] The above description only illustrates preferred embodiments of the present invention and should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. In short, all variations made within the scope of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A steel box girder beam plate weld quality detection device, characterized in that: The detection host, the detection support and the detection probe assembly are electrically connected through lead wires; The detection support includes a moving frame, a telescopic mechanism, a moving wheel mechanism and an operating lever; the moving wheel mechanism is arranged at the bottom of the moving frame; the telescopic mechanism includes a sleeve assembly telescopically arranged on the moving frame; the sleeve assembly includes an outer sleeve and an inner sleeve which are telescopically connected to each other; the detection probe assembly is installed on the inner side of the inner sleeve for detecting the weld quality; the operating lever is connected to the outer side of the outer sleeve for pushing the moving frame to move and for the telescopic action of the telescopic mechanism; The telescopic mechanism further includes a mounting plate and a return spring; the outer sleeve is mounted on the mounting plate and is threadedly connected to the inner sleeve; the operating lever is hingedly connected to the outer sleeve; one end of the return spring is connected to the moving frame and the other end is connected to the mounting plate; A flexible fastening sleeve is arranged between the outer sleeve and the inner sleeve; the radial movement of the flexible fastening sleeve is driven by the rotational movement of the outer sleeve and the inner sleeve; An inner side of the outer sleeve is provided with a driving slope; the flexible fastening sleeve is arranged opposite to the driving slope; the radial movement of the flexible fastening sleeve is driven by the driving slope.

2. The steel box girder beam plate weld quality detection device according to claim 1, characterized in that: The moving wheels are fixedly connected to the four corners of the bottom of the detection support.

3. The steel box girder beam plate weld quality detection device according to claim 1, characterized in that: Sliding guide rods are arranged on the mounting plate; the sliding guide rods are symmetrically arranged along the central axis of the telescopic mechanism.

4. The steel box girder beam plate weld quality detection device according to claim 1, characterized in that: A protective cover is arranged at the lower part of the moving frame; the lower side of the protective cover is flush with the lower end of the moving wheels.

5. The steel box girder beam plate weld quality detection device according to claim 1, characterized in that: A blowing assembly is arranged on the detection support; the blowing assembly includes a piston assembly, a linkage driving assembly and a blowing nozzle; the blowing nozzle is in communication with the piston assembly; the piston assembly is moved by the linkage driving assembly. 6.The steel box girder plate weld quality detection device according to claim 5, characterized in that: The linkage driving assembly includes a driving cam; the piston assembly includes a transmission sector plate, a piston push rod and a piston; the driving cam is connected to the moving wheels through a rotating shaft and rotates synchronously; the driving cam is in transmission connection with the transmission sector plate; the piston push rod is connected to the transmission sector plate and the piston at two ends respectively.

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