A steel box girder weld detection device

Abstract

The present invention relates to the technical field of steel box girder weld detection equipment, and in particular to a steel box girder weld detection device, comprising a machine base, a fixed component fixedly connected to the machine base, and a multi-degree-of-freedom mobile component, wherein the multi-degree-of-freedom mobile component has a mobile end capable of multi-degree-of-freedom movement, a detection component fixed to the mobile end, the detection component having a plurality of detection units, the detection units including a detection shell, a movable cavity arranged vertically provided in the detection shell, a bottom opening connected to the movable cavity provided at the bottom of the detection shell, a movable module installed in the movable cavity, the bottom of the movable module extending out of the bottom opening, and a weld detection probe fixed thereto by an elastic connection. The present invention realizes the rapid deployment of the weld detection device through the coordination of the fixed component, the multi-degree-of-freedom mobile component, and the detection component, thereby increasing the scope of application of the weld detection device.

Description

Technical Field

[0001] The present invention relates to the technical field of steel box girder weld detection equipment, in particular to a steel box girder weld detection device. Background Art

[0002] Steel box girders are widely used in bridges, buildings and other fields, and the quality of their welds is directly related to the safety and stability of the structure.

[0003] like Figure 1 The structure of a steel box girder shown is complex and changeable. The traditional manual welding inspection method requires the probe to be inserted deep into the steel box girder structure for inspection. However, due to the complex and changeable structure of the steel box girder, the inspection personnel cannot achieve rapid deployment and inspection, which greatly limits the inspection efficiency, especially in large-scale and long-distance weld inspection. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a steel box girder weld detection device to solve the problem that the inspectors cannot perform rapid inspection due to the complex and changeable structure of the steel box girder.

[0005] Based on the above-mentioned purpose, the present invention provides a steel box girder weld detection device, comprising a machine base; a fixing component, which is detachably fixed to the lower end of the machine base and is used to fix the weld detection device; a multi-degree-of-freedom moving component, which is fixed to the upper end of the machine base and has a moving end that can move with multiple degrees of freedom; a detection component, which is fixedly connected to the moving end and has a plurality of detection units arranged along the length direction of the moving end, the detection unit comprising a detection shell, a movable cavity arranged vertically is provided in the detection shell, a bottom opening connected to the movable cavity is provided at the bottom of the detection shell, a movable module that can move vertically is installed in the movable cavity, the bottom opening extends from the lower part of the movable module, and a weld detection probe is fixed to the movable module by an elastic connection, and a movable channel for the weld detection probe line to pass through is provided vertically on the movable module.

[0006] In an optional example, the movable module includes a movable ring and an elastic member 1, the movable ring is installed in the movable cavity along the vertical sliding direction, the elastic member 1 is arranged in the movable cavity, one end of the elastic member 1 is in conflict with the upper end of the movable ring, and the other end of the elastic member 1 is in conflict with the inner wall of the movable cavity, and the diameter of the movable channel is smaller than the diameter of the elastic member 1.

[0007] In an optional example, a second elastic member is fixed on the movable ring, the second elastic member extends downward to form a bottom opening, and the weld detection probe is fixedly connected to the second elastic member.

[0008] In an optional example, the second elastic member includes an elastic ring body for fixing the weld detection probe, the upper part of the elastic ring body is provided with at least one elastic leg extending toward the outside, and the diameter of the movable channel is larger than the diameter of the elastic ring body.

[0009] In an optional example, a position detector is fixed on the detection shell, the detection end of the position detector is fixedly connected to the movable ring, an extension portion is provided on the outer wall of the movable ring, and a side through groove penetrating the detection shell is provided on the side wall of the movable cavity, the extension portion passes through the side through groove and is fixedly connected to the detection end of the position detector.

[0010] In an optional example, the movable module includes a floating ring body, the upper end of the floating ring body is provided with a plug-in ring groove, a positioning ring body is inserted and fixed in the plug-in ring groove, a plurality of positioning grooves are provided at the bottom of the positioning ring body, the positioning grooves pass through the inner ring of the positioning ring body, the elastic support legs are inserted in the positioning grooves, a plurality of first through holes are provided on the positioning ring body vertically passing through the positioning ring body, a second through hole is provided on the elastic support legs vertically passing through the elastic support legs, a plurality of threaded holes are provided at the bottom of the plug-in ring groove, the threaded holes are connected to the corresponding first through holes and second through holes, and are fixed with connecting bolts.

[0011] In an optional example, a wire hole penetrating the detection housing is provided at the bottom of the movable cavity, and an elastic fixing ring for connecting a weld detection probe circuit is inserted into the wire hole.

[0012] In an optional example, the multi-degree-of-freedom moving component includes a guide mechanism and a telescopic mechanism, the guide mechanism has a sliding end that can move along the length direction of the machine base, the telescopic mechanism is installed on the sliding end by rotation, the telescopic mechanism has a telescopic end, and the telescopic end is connected to the moving end by rotation.

[0013] In an optional example, the guide mechanism includes a guide column and a driving column arranged along the length direction of the machine base, the sliding end includes a sliding platform, and two guide sliders are fixed to the lower end of the sliding platform, one of the guide sliders is slidably mounted on the outer wall of the guide column, and the other guide slider is slidably mounted on the outer wall of the driving column, a driving motor is fixed on the sliding platform, a driving gear is fixed on the output shaft of the driving motor, a plurality of driven teeth are provided on the driving column along the axial direction of the driving column, the driving gear is meshed with the driven teeth, and a rotating mechanism is fixed on the sliding platform, and the rotating mechanism has a rotating table with the vertical direction as the rotation center.

[0014] In an optional example, the mobile end includes a mobile bracket, a connecting bracket is fixed on the mobile bracket, the telescopic mechanism includes a main bracket, a telescopic bracket that can slide along the length direction of the main bracket is installed on the main bracket in a sliding manner, a rotating hole 1 is provided on the rotating table, and a rotating hole 2 is provided on the main bracket, a locking bolt 1 is inserted into the rotating hole 1 and the rotating hole 2, and a locking nut 1 is provided on the outer wall of the locking bolt 1 by a threaded connection, and is used to fix the rotation angle of the main bracket, a rotating hole 1 is provided on the telescopic bracket, and a rotating hole 2 is provided on the connecting bracket, a locking bolt 2 is inserted into the rotating hole 1 and the rotating hole 2, and a locking nut 2 is provided on the outer wall of the locking bolt 2 by a threaded connection, and is used to fix the rotation angle of the mobile bracket.

[0015] The beneficial effects of the present invention are that, through the coordination of the fixed component, the multi-degree-of-freedom mobile component and the detection component, the rapid deployment of the weld detection device is achieved, the application scope of the weld detection device is increased, and the detection efficiency of the weld detection device is improved. In addition, the weld detection probe avoids the deviation caused by the weld height through the compensation mechanism of the movable module, so that the weld detection probe can accurately contact the surface of the weld, effectively eliminating the influence of the uneven weld surface on the detection accuracy, and ensuring the detection accuracy of the weld detection device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 1 It is the structural diagram of the steel box girder;

[0018] Figure 2 A front view of an embodiment of the present invention;

[0019] Figure 3 Schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0020] Figure 4 Schematic diagram of the three-dimensional structure of the detection unit in an embodiment of the present invention;

[0021] Figure 5 is a cross-sectional view of a detection unit in an embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the explosion of the detection unit in the embodiment of the present invention Figure 1 ;

[0023] Figure 7 Schematic diagram of the explosion of the detection unit in the embodiment of the present invention Figure 2 ;

[0024] Figure 8 Schematic diagram of an exploded view of a multi-degree-of-freedom mobile assembly in an embodiment of the present invention.

[0025] The following are marked in the figure: 1. Machine base; 2. Fixed assembly; 3. Multi-degree-of-freedom moving assembly; 31. Moving end; 311. Moving bracket; 312. Connecting bracket; 3121. Rotating hole 2; 32. Guide mechanism; 321. Guide column; 322. Driving column; 323. Fixed seat; 324. Sliding platform; 325. Guide slider; 326. Driving motor; 327. Driving gear; 33. Telescopic mechanism; 331. Main bracket; 3312. Rotating hole 2; 332. Telescopic bracket; 3321. Rotating hole 1; 34. Rotating mechanism; 341. Rotating platform; 3411. Rotating hole 1; 35. Locking bolt 1; 36. Locking nut 1; 37. Locking bolt 2; 38. Locking nut 2; 4. Detection assembly; 5. Detection unit Element; 51. Detection shell; 511. Active cavity; 5111. Wire hole; 512. Bottom opening; 513. Side through slot; 514. Detection shell; 515. Shell ring; 516. Active slot; 517. Sliding bar; 52. Active module; 521. Active channel; 522. Active ring; 5221. Extension; 5222. Sliding slot; 523. Elastic part 1; 524. Elastic part 2; 5241. Elastic ring body; 5242. Elastic support leg; 5243. Second through hole; 525. Floating ring body; 5251. Plug-in ring slot; 5252. Threaded hole; 526. Positioning ring body; 5261. Positioning slot; 5262. First through hole; 53. Weld detection probe; 54. Elastic fixing ring; 6. Position detector. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] In one embodiment, see Figures 2 to 5 As shown, the present invention provides a steel box girder weld detection device, which includes: a machine base 1, a fixed component 2, a multi-degree-of-freedom moving component 3 and a detection component 4.

[0029] The fixing assembly 2 is detachably fixed to the lower end of the machine base 1 by bolt connection and is used to fix the weld detection device. Among them, the fixing assembly 2 can adopt an electromagnet. The fixing assembly 2 can adjust its position according to the structure of the steel box girder and is suitable for fixing the steel box girder at different positions.

[0030] The multi-degree-of-freedom moving assembly 3 is fixed to the upper end of the machine base 1 and has a moving end 31 capable of moving with multiple degrees of freedom. The multi-degree-of-freedom moving assembly 3 can realize precise movement of the moving end 31 in multiple directions, ensuring that the detection assembly 4 can accurately reach the weld position.

[0031] The detection assembly 4 is fixedly connected to the mobile end 31 and has a plurality of detection units 5 arranged along the length direction of the mobile end 31. Among them, multiple groups of detection units 5 can achieve synchronous detection of different positions of the weld.

[0032] The detection unit 5 includes a detection housing 51, which defines a vertically movable chamber 511. A bottom opening 512 communicating with the movable chamber 511 is defined at the bottom of the detection housing 51. A vertically movable movable module 52 is housed within the movable chamber 511. The bottom opening 512 extends from the lower portion of the movable module 52, and a weld detection probe 53 is elastically secured to the movable module 52. A vertically movable channel 521 is defined on the movable module 52 for passage of the weld detection probe 53 circuit. The weld detection probe 53 can be a non-destructive testing device such as an ultrasonic testing head. The weld detection probe 53 is elastically secured and can swing within a certain range. The movable module 52 can also generate a certain amount of vertical displacement to avoid deviations due to weld height, thereby ensuring weld detection accuracy.

[0033] Working principle:

[0034] The fixing component 2 is quickly adsorbed and fixed near the area to be inspected of the steel box girder. The operator drives the multi-degree-of-freedom mobile component 3 to accurately position the detection component 4 to the detection position. The vertical displacement capability of the movable module 52 can automatically compensate for the unevenness of the steel box girder surface or the weld itself in the height direction. When the weld is locally convex, the probe is pressed to push the movable module 52 upward. When encountering a depression, the movable module 52 moves downward under the action of gravity or a built-in spring, always maintaining basic contact between the probe and the surface.

[0035] Specifically, this example achieves rapid deployment of the weld detection device through the cooperation of the fixed component 2, the multi-degree-of-freedom mobile component 3 and the detection component 4, increases the scope of use of the weld detection device, and improves the detection efficiency of the weld detection device. In addition, the weld detection probe 53 avoids deviations caused by the weld height through the compensation mechanism of the movable module 52, so that the weld detection probe 53 can accurately contact the surface of the weld, effectively eliminating the influence of the uneven weld surface on the detection accuracy, and ensuring the detection accuracy of the weld detection device.

[0036] In an alternative example, see Figures 2 to 5As shown, the weld surface of a steel box girder often exhibits varying degrees of unevenness (such as weld waves, undercuts, and misaligned edges). In existing inspection devices, the probe is typically rigidly attached to the weld surface. When the weld height varies locally or the device moves over undulating surfaces, it becomes difficult for the probe to adaptively maintain constant contact pressure and vertical coupling with the weld surface in real time. This can cause the probe to become suspended (poor coupling), resulting in signal loss or attenuation and a high risk of missed detections. The unstable detection signal affects defect identification and quantification accuracy. To address the accuracy issues of the weld inspection device, the movable module 52 includes a movable ring 522 and an elastic member 1 523. The movable ring 522 is vertically slidably mounted within the movable cavity 511. The elastic member 1 523 is disposed within the movable cavity 511. One end of the elastic member 1 523 contacts the upper end of the movable ring 522, while the other end of the elastic member 1 523 contacts the inner wall of the movable cavity 511. The diameter of the movable channel 521 is smaller than that of the elastic member 1 523. The elastic member 523 may be a spring.

[0037] Specifically, this example compensates from a macroscopic height through elastic part 523. When encountering a local bulge in the weld, the probe pushes the movable ring 522 upward to compress the elastic part 523. When encountering a depression, under the action of the restoring force of the elastic part 523, it clings to the weld surface. The elastic part 523 ensures that the movable ring 522 can be stably reset.

[0038] In an alternative example, see Figures 2 to 5 As shown, a second elastic member 524 is fixed on the movable ring 522 . The second elastic member 524 extends downward out of the bottom opening 512 . The weld detection probe 53 is fixedly connected to the second elastic member 524 .

[0039] Specifically, this example performs micro-posture compensation through elastic part 2 524. When encountering micro-unevenness on the weld surface, such as weld toe transition, spatter, or slight deviation in the movement trajectory, the weld detection probe 53 is subjected to lateral force, and elastic swing is generated through the deformation of elastic part 2 524, so that the bottom surface of the weld detection probe 53 adaptively fits the local contour of the weld to ensure effective contact.

[0040] In an alternative example, see Figures 2 to 7 As shown, the second elastic member 524 includes an elastic ring body 5241 for fixing the weld inspection probe 53. The upper portion of the elastic ring body 5241 is provided with at least one elastic leg 5242 extending outward. The diameter of the movable channel 521 is larger than the diameter of the elastic ring body 5241. The weld inspection probe 53 can be fixedly connected to the elastic ring body 5241 by bonding or bolting.

[0041] Specifically, this example effectively prevents the weld detection probe 53 from being forced into the movable channel 521 and causing it to get stuck, damaged, or lose its swinging function when the weld detection probe 53 is subjected to abnormal lateral force or improper installation through the combined design of the elastic ring 5241 and the elastic support leg 5242, thereby ensuring the reliability of the secondary compensation.

[0042] In an alternative example, see Figures 2 to 7 As shown, the position detector 6 is fixed to the detection housing 51 by means of bolts. The detection end of the position detector 6 is fixedly connected to the movable ring 522 by means of bolts. An extension portion 5221 is provided on the outer wall of the movable ring 522. A side through-slot 513 is provided on the side wall of the movable cavity 511, which penetrates the detection housing 51. The extension portion 5221 passes through the side through-slot 513 and is fixedly connected to the detection end of the position detector 6 by means of bolts. The detection housing 51 includes a detection housing 514, which is provided with a movable groove 516. A housing ring 515 is fixed in the movable groove 516 by means of a threaded connection. The movable groove 516 and the housing ring 515 form the movable cavity 511. A sliding bar 517 is provided in the movable groove 516. A sliding groove 5222 matching the sliding bar 517 is provided on the outer wall of the movable ring 522. The elastic force of the elastic member 1 523 pushes the movable ring 522 toward the housing ring 515.

[0043] Specifically, this example realizes real-time online measurement of the displacement of the movable ring 522 by adding a position detector 6. Combined with the coordinates of the mobile platform, a three-dimensional digital model of the weld surface with millimeter-level accuracy is simultaneously constructed to provide a spatial reference for subsequent analysis.

[0044] In an alternative example, see Figures 2 to 7 As shown, the movable module 52 includes a floating ring body 525, and a plug-in ring groove 5251 is provided at the upper end of the floating ring body 525. A positioning ring body 526 is inserted and fixed in the plug-in ring groove 5251. A plurality of positioning grooves 5261 are provided at the bottom of the positioning ring body 526. The positioning grooves 5261 pass through the inner circle of the positioning ring body 526. The elastic support legs 5242 are inserted in the positioning grooves 5261. A plurality of first through holes 5262 that vertically pass through the positioning ring body 526 are provided on the positioning ring body 526. A second through hole 5243 that vertically passes through the elastic support legs 5242 is provided on the elastic support legs 5242. A plurality of threaded holes 5252 are provided at the bottom of the plug-in ring groove 5251. The threaded holes 5252 are connected with the corresponding first through holes 5262 and second through holes 5243, and are fixed with connecting bolts.

[0045] Specifically, the movable module 52 of this example adopts a split structural design, which has a simple structural design and is easy to disassemble and assemble, which facilitates the rapid maintenance of the movable module 52 and reduces the manufacturing and maintenance costs of the movable module 52.

[0046] In an alternative example, see Figures 2 to 7 As shown, a wire hole 5111 penetrating the detection housing 51 is provided at the bottom of the movable cavity 511 , and an elastic fixing ring 54 for connecting the circuit of the weld detection probe 53 is inserted into the wire hole 5111 .

[0047] Specifically, this example fixes the weld detection probe 53 circuit by adding an elastic fixing ring 54, so that the circuit can maintain a relative position, avoid displacement and deflection of the weld detection probe 53 during posture compensation, and ensure the service life of the circuit.

[0048] In an alternative example, see Figures 2 to 7 As shown, the multi-degree-of-freedom moving assembly 3 includes a guide mechanism 32 and a telescopic mechanism 33. The guide mechanism 32 has a sliding end that can move along the length direction of the base 1. The telescopic mechanism 33 is installed on the sliding end by rotation. The telescopic mechanism 33 has a telescopic end, which is connected to the moving end 31 by rotation.

[0049] Specifically, this example realizes multi-degree-of-freedom movement of the mobile end 31 through the cooperation of the guide mechanism 32 and the telescopic mechanism 33, thereby ensuring the detection accuracy of the detection unit 5.

[0050] In an alternative example, see Figures 2 to 8 As shown, the guide mechanism 32 includes a guide column 321 and a drive column 322 arranged along the length of the base 1. A plurality of fixing seats 323 are mounted on the base 1 via bolt connections. The fixing seats 323 are provided with insertion holes, and the guide columns 321 and the drive columns 322 are inserted into the corresponding insertion holes. Insert bolts are fixed to the outer walls of the fixing seats 323 via threaded connections. The insert bolts extend into the insertion holes and are fixedly connected to the corresponding guide columns 321 and the drive columns 322 via threaded connections.

[0051] The sliding end includes a sliding platform 324. Two guide sliders 325 are bolted to the lower end of the sliding platform 324. One guide slider 325 slides onto the outer wall of the guide column 321, and the other guide slider 325 slides onto the outer wall of the drive column 322. A drive motor 326 is bolted to the sliding platform 324. A drive gear 327 is keyed to the output shaft of the drive motor 326. The drive column 322 has a plurality of driven teeth along its axis, and the drive gear 327 meshes with the driven teeth. A rotating mechanism 34 is fixed to the sliding platform 324. The rotating mechanism 34 includes a rotating platform 341 with a vertical rotation center. The rotating mechanism 34 includes a control mechanism that controls the rotation angle of the rotating platform 341.

[0052] Specifically, this example drives the driving motor 326 , the output shaft of the driving motor 326 drives the driving gear 327 to rotate, and the driving gear 327 drives the sliding platform 324 to move, thereby achieving the displacement of the detection component 4 along the length direction of the machine base 1 .

[0053] In an alternative example, see Figures 2 to 8 As shown, the mobile end 31 includes a mobile bracket 311 , and a connecting bracket 312 is fixed on the mobile bracket 311 .

[0054] The telescopic mechanism 33 includes a main frame 331, onto which a telescopic frame 332 is slidably mounted, capable of sliding along the length of the main frame 331. A rotation hole 1 3411 is defined in the rotating platform 341, and a rotation hole 2 3312 is defined in the main frame 331. Locking bolt 1 35 is inserted into rotation hole 1 3411 and rotation hole 2 3312. A locking nut 1 36 is threadedly mounted on the outer wall of locking bolt 1 35 and serves to fix the rotation angle of the main frame 331. Rotating the locking nut 1 changes the distance between the locking nut 1 and the main frame 331, thereby controlling the rotation angle of the main frame 331.

[0055] Telescopic bracket 332 has a first rotation hole 3321, and connecting bracket 312 has a second rotation hole 3121. Locking bolt 37 is inserted into first and second rotation holes 3321 and 3121. Locking nut 38 is threadedly attached to the outer wall of locking bolt 37 and is used to control the rotation angle of movable bracket 311. Rotating locking nut 38 changes the distance between locking nut 38 and telescopic bracket 332, thereby controlling the rotation angle of movable bracket 311.

[0056] A rotation hole three is opened on the main support 331 , and a rotation bolt is fixed in the rotation hole three by means of a threaded connection. The end of the rotation bolt can contact the side wall of the telescopic support 332 and fix the telescopic support 332 .

[0057] Specifically, this example controls the rotation position of the telescopic mechanism 33 by cooperating with the locking nut 1 36 and the locking bolt 1 35, and controls the rotation position of the detection component 4 by cooperating with the locking nut 2 38 and the locking bolt 2 37, thereby ensuring the detection accuracy of the detection component 4. At the same time, the telescopic mechanism 33 has fewer structures and a lighter overall weight, which facilitates the rapid fixation of the machine base 1 and reduces the overall weight and manufacturing cost of the weld detection device.

[0058] In general, the present invention realizes the rapid deployment of the weld detection device through the cooperation of the fixed component 2, the multi-degree-of-freedom mobile component 3 and the detection component 4, increases the scope of application of the weld detection device, and compensates from a macroscopic height through the elastic part 1 523 to avoid the weld detection probe 53 being affected by the height detection, so that the bottom surface of the weld detection probe 53 adaptively fits the local contour of the weld to ensure effective contact. At the same time, microscopic posture compensation is performed through the elastic part 2 524. When encountering microscopic unevenness on the weld surface, such as weld toe transition, spatter or slight deviation of the moving trajectory, the weld detection probe 53 is subjected to lateral force, and elastic swing is generated through the deformation of the elastic part 2 524, further making the bottom surface of the weld detection probe 53 adaptively fit the local contour of the weld.

[0059] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0060] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A steel box girder weld detection device, characterized in that: include: Machine base (1); A fixing assembly (2) is detachably fixed to the lower end of the machine base (1) and is used to fix the weld detection device; A multi-degree-of-freedom moving assembly (3) is fixed to the upper end of the machine base (1) and has a moving end (31) capable of moving with multiple degrees of freedom; A detection assembly (4) is fixedly connected to the mobile end (31) and comprises a plurality of detection units (5) arranged along the length direction of the mobile end (31). The detection unit (5) comprises a detection housing (51), a movable cavity (511) arranged vertically is provided in the detection housing (51), a bottom opening (512) communicating with the movable cavity (511) is provided at the bottom of the detection housing (51), a movable module (52) capable of moving vertically is installed in the movable cavity (511), a bottom portion of the movable module (52) extends out of the bottom opening (512) and is fixed with a weld detection probe (53) by means of an elastic connection, and a movable channel (521) for the line of the weld detection probe (53) to pass through is provided vertically on the movable module (52); The movable module (52) includes a movable ring (522) and an elastic member (523). The movable ring (522) is mounted in the movable cavity (511) in a vertical sliding manner. The elastic member (523) is disposed in the movable cavity (511). One end of the elastic member (523) contacts the upper end of the movable ring (522), and the other end of the elastic member (523) contacts the inner wall of the movable cavity (511). The diameter of the movable channel (521) is smaller than the diameter of the elastic member (523). A second elastic member (524) is fixed on the movable ring (522), the second elastic member (524) extends downward to form a bottom opening (512), and the weld detection probe (53) is fixedly connected to the second elastic member (524); The second elastic member (524) comprises an elastic ring body (5241) for fixing the weld detection probe (53); the upper portion of the elastic ring body (5241) is provided with at least one elastic leg (5242) extending outward; and the diameter of the movable channel (521) is larger than the diameter of the elastic ring body (5241).

2. The steel box girder weld detection device according to claim 1, characterized in that: A position detector (6) is fixed on the detection housing (51), and a detection end of the position detector (6) is fixedly connected to a movable ring (522). An extension portion (5221) is provided on the outer wall of the movable ring (522). A side through-slot (513) penetrating the detection housing (51) is provided on the side wall of the movable cavity (511). The extension portion (5221) passes through the side through-slot (513) and is fixedly connected to the detection end of the position detector (6).

3. The steel box girder weld detection device according to claim 2, characterized in that: The movable module (52) includes a floating ring body (525), the upper end of the floating ring body (525) is provided with a plug-in ring groove (5251), a positioning ring body (526) is inserted and fixed in the plug-in ring groove (5251), and a plurality of positioning grooves (5261) are provided at the bottom of the positioning ring body (526), ​​the positioning grooves (5261) pass through the inner ring of the positioning ring body (526), ​​the elastic legs (5242) are inserted in the positioning grooves (5261), and the positioning The positioning ring body (526) is provided with a plurality of first through holes (5262) ​​vertically penetrating the positioning ring body (526), ​​the elastic support leg (5242) is provided with a second through hole (5243) vertically penetrating the elastic support leg (5242), and the bottom of the plug-in ring groove (5251) is provided with a plurality of threaded holes (5252), and the threaded holes (5252) are connected to the corresponding first through holes (5262) ​​and second through holes (5243), and are fixed with connecting bolts.

4. The steel box girder weld detection device according to claim 1, characterized in that: A wire hole (5111) penetrating the detection housing (51) is provided at the bottom of the movable cavity (511), and an elastic fixing ring (54) for connecting the circuit of the weld detection probe (53) is inserted into the wire hole (5111).

5. The steel box girder weld detection device according to claim 1, characterized in that: The multi-degree-of-freedom moving assembly (3) comprises a guide mechanism (32) and a telescopic mechanism (33); the guide mechanism (32) has a sliding end that can move along the length direction of the machine base (1); the telescopic mechanism (33) is mounted on the sliding end in a rotational manner; the telescopic mechanism (33) has a telescopic end that is connected to the moving end (31) in a rotational manner.

6. The steel box girder weld detection device according to claim 5, characterized in that: The guide mechanism (32) includes a guide column (321) and a driving column (322) arranged along the length direction of the machine base (1); the sliding end includes a sliding platform (324); two guide sliders (325) are fixed to the lower end of the sliding platform (324); one guide slider (325) is slidably mounted on the outer wall of the guide column (321); the other guide slider (325) is slidably mounted on the outer wall of the driving column (322); a driving motor (326) is fixed to the sliding platform (324); a driving gear (327) is fixed to the output shaft of the driving motor (326); a plurality of driven teeth are provided on the driving column (322) along the axial direction of the driving column (322); the driving gear (327) is meshed with the driven teeth; a rotating mechanism (34) is fixed to the sliding platform (324); and the rotating mechanism (34) has a rotating table (341) with a vertical rotation center.

7. The steel box girder weld detection device according to claim 6, characterized in that: The movable end (31) includes a movable bracket (311), a connecting bracket (312) is fixed on the movable bracket (311), the telescopic mechanism (33) includes a main bracket (331), a telescopic bracket (332) that can slide along the length direction of the main bracket (331) is installed on the main bracket (331) in a sliding manner, a rotating hole 1 (3411) is opened on the rotating platform (341), a rotating hole 2 (3312) is opened on the main bracket (331), and a locking bolt 1 (35) is inserted into the rotating hole 1 (3411) and the rotating hole 2 (3312). ), a locking nut (36) is mounted on the outer wall of the locking bolt (35) by means of a threaded connection, and is used to fix the rotation angle of the main bracket (331), a rotation hole (3321) is provided on the telescopic bracket (332), a rotation hole (3121) is provided on the connecting bracket (312), a locking bolt (37) is inserted into the rotation hole (3321) and the rotation hole (3121), a locking nut (38) is mounted on the outer wall of the locking bolt (37) by means of a threaded connection, and is used to fix the rotation angle of the movable bracket (311).

Images