Automatic flaw detection equipment for expressway bridge

Abstract

The invention relates to the field of bridge flaw detection, in particular to highway bridge automatic flaw detection equipment which comprises a frame, a mounting plate arranged in the frame in a front-back sliding manner, a flaw detector fixedly mounted on the front side of the mounting plate, and a guide mechanism for enabling the flaw detector to stably move on the side surface of a bridge with different inclination angles with the ground, according to the invention, auxiliary wheels in the guide mechanism are adopted to support the weight of the frame and the flaw detector, and the angle and position of the auxiliary wheels are flexibly adjusted, so that an operator can be assisted to move the frame and the flaw detector; by adjusting the supporting ring piece, the number of supporting points when the auxiliary wheel is hung on the inclined plane can be increased, and then the supporting stability when the auxiliary wheel moves on the inclined plane is improved.

Description

Technical Field

[0001] The invention relates to the field of bridge inspection and flaw detection, and in particular to automatic flaw detection equipment for highway bridges. Background Art

[0002] As an important infrastructure, highway bridges are subject to long-term impacts such as vehicle loads, environmental erosion, and material aging. Hidden damage such as cracks and corrosion may occur inside or on the surface of the bridges. If these damages are not discovered and repaired in time, safety accidents can easily occur. Currently, the use of flaw detectors for automated non-destructive testing of bridges has become an industry trend. They use ultrasonic, electromagnetic and other technologies to efficiently identify internal defects, significantly improving detection efficiency and reliability.

[0003] To ensure the stable movement of the flaw detector on the bridge surface, the existing technology usually adopts a frame structure with rollers. The flaw detector is fixed inside the frame, and the rollers are manually pushed to roll along the bridge surface, thereby driving the flaw detector to complete the scanning inspection. This type of frame structure reduces the labor intensity of manual operation to a certain extent and can adapt to the flat or simple curved surfaces of the bridge.

[0004] However, the above-mentioned flaw detection method still has two significant shortcomings. First, the manual handheld frame is easily affected by factors such as the operator's physical strength and experience during movement, resulting in unstable contact between the frame and the bridge. This is especially true when inspecting the side of the bridge that is not perpendicular to the ground, such as when inspecting curved bridge piers. The frame is easily offset by gravity or external forces, causing the flaw detector's movement path to become skewed and the detection data to deviate.

[0005] Secondly, the existing flaw detection method lacks a mechanism to adjust and stabilize the distance between the flaw detector and the side of the bridge. The distance between the flaw detector and the side of the bridge can easily change due to operator error. Especially when inspecting curved bridge piers, the flaw detector moves from the flat area to the curved area of the pier, causing the flaw detector to gradually approach the curved surface of the pier. This may cause the flaw detector to be unable to effectively receive the echo signal, ultimately affecting the accuracy of defect identification. Summary of the Invention

[0006] In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an automatic flaw detection equipment for highway bridges, including a frame, a mounting plate is provided inside the frame for sliding back and forth, and a flaw detector is fixedly installed on the front side of the mounting plate. The equipment also includes a guide mechanism for allowing the flaw detector to move stably on the side of the bridge with different inclination angles to the ground, and a distance stabilizing mechanism for ensuring that the distance between the flaw detector and the side of the bridge is always consistent during operation.

[0007] The guide mechanism includes a movable plate arranged on the rear side of the frame for sliding back and forth through a guide column, a walking wheel is rotatably arranged on the rear side of the movable plate, and two auxiliary wheels arranged left and right are provided on the movable plate through an adjustment component. The adjustment component moves and flips the auxiliary wheels so that the auxiliary wheels guide the movement of the frame by hanging and supporting.

[0008] The distance stabilizing mechanism includes an abutment wheel arranged at the upper end of the rear side of the mounting plate through the rotation of the support plate, and a push spring for pushing the mounting plate backward is arranged between the mounting plate and the frame. The distance stabilizing mechanism also includes a stop component for stopping the movement of the flaw detector when the distance between the flaw detector and the side of the bridge changes.

[0009] Preferably, the adjustment component includes two lifting plates arranged on the left and right sides and sliding up and down on the front side of the movable plate, an angle adjustment plate is rotatably provided on the upper side of the lifting plate, a sliding plate frame is slidably provided on the upper side of the angle adjustment plate, a flip block is rotatably provided on the rear side of the sliding plate frame, and the flip block is rotatably connected to the auxiliary wheel.

[0010] Preferably, a plurality of positioning holes are provided at equal intervals in the vertical direction on the lifting plate, and two symmetrically arranged pins are fixedly mounted on the upper rear end of the frame, and the pins are used to be inserted into the corresponding positioning holes.

[0011] Preferably, two slots are symmetrically arranged front to back on the side of the lower end of the angle adjustment plate away from the middle of the frame, and a plug column is provided on the lifting plate for sliding in the vertical direction. An arc-shaped waist groove is provided on the side of the lower end of the angle adjustment plate close to the middle of the frame, and the upper side of the lifting plate is slidably connected to the inside of the arc-shaped waist groove through a raised column.

[0012] Preferably, a locking member is provided inside the sliding plate frame for sliding back and forth, and three square plug-ins arranged front to back are provided on the inner side of the sliding plate frame for sliding up and down. Three inclined grooves are provided on the locking member, and the locking member is slidably connected to the corresponding inclined grooves through the linkage column thereon.

[0013] Preferably, a coil spring is provided between the locking member and the sliding plate frame, locking holes for inserting the locking member are provided on the side of the auxiliary wheel rotation axis and the flip block, and a rectangular hole for inserting the square plug-in is provided on the upper side of the angle adjustment plate.

[0014] Preferably, a support ring is provided on the upper side of the auxiliary wheel for sliding along its axial direction, a screw is rotatably provided on the auxiliary wheel for threaded connection with the support ring, and the upper part of the support ring is an annular column structure.

[0015] Preferably, the stop assembly includes a linkage disk fixedly mounted on the shaft of the traveling wheel, rectangular grooves are provided on the linkage disk at equal intervals along its circumference, two locking rods arranged on the left and right are slidably provided in the vertical direction on the mounting plate, a return spring is provided between the locking rod and the mounting plate, and two wedge plates for pushing the locking rod upward are fixedly mounted on the frame.

[0016] Preferably, a friction disc is fixedly mounted on the upper side of the abutting wheel, and two symmetrically arranged clamping plates are provided on the upper side of the support plate for sliding up and down through a driving structure. The clamping plates are used to clamp the friction disc, thereby slowing down the abutting wheel.

[0017] Preferably, a hemispherical groove is provided on the lower side of the support plate, a limiting column is provided on the movable plate for sliding in the vertical direction, the upper part of the limiting column is a dome structure, and a compression spring is provided between the limiting column and the movable plate.

[0018] The beneficial effects of the present invention are as follows: 1. The present invention uses auxiliary wheels in the guide mechanism to support the weight of the frame and the flaw detector. By flexibly adjusting the angle and position of the auxiliary wheels, the operator can be assisted in moving the frame and the flaw detector, thereby effectively preventing the flaw detector from deviating during the mobile flaw detection process, ensuring the accuracy of the detection data, and by adjusting the support ring, the support points of the auxiliary wheels when hanging on the inclined surface can be increased, thereby increasing the support stability when moving on the inclined surface, and further avoiding distortion of the flaw detector detection data due to path deviation.

[0019] 2. The present invention adopts a rotating angle adjustment plate to create an angle between the auxiliary wheel and the moving path, so that the auxiliary wheel can continuously pull the moving plate toward the side of the bridge while the bridge moves, thereby ensuring that the traveling wheel always moves close to the bridge, further improving the stability of the flaw detector's movement.

[0020] 3. The present invention uses a wedge plate in the stop assembly to cooperate with the locking rod to monitor in real time whether the operator manually pushes the frame to close to the lifting plate. If the frame is separated from the lifting plate, the rotation of the running wheels is stopped to prevent the flaw detector from continuing to move, thereby ensuring that the distance between the flaw detector and the side of the bridge remains unchanged during inspection.

[0021] Fourth, the present invention adopts abutment wheels to push the flaw detector to move relative to the running wheels when the flaw detector moves to the arc area, so that the distance between the flaw detector and the arc area of the bridge remains unchanged. When the flaw detector moves relative to the running wheels, the friction disk can be clamped by the clamping plate to prevent the flaw detector from moving too fast, thereby preventing the problem of repeated bouncing caused by rapid changes in the distance between the flaw detector and the bridge, and further ensuring that the distance between the flaw detector and the side of the bridge remains unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2It is a structural diagram of the frame, movable plate, running wheels and adjustment components in the present invention.

[0025] Figure 3 It is a partial cross-sectional view of the movable plate, the traveling wheel, the linkage disk and the locking rod in the present invention.

[0026] Figure 4 It is a partial cross-sectional view of the lifting plate, angle adjustment plate, sliding plate frame and turning block in the present invention.

[0027] Figure 5 It is a cross-sectional view of the auxiliary wheel, support ring, locking member and square plug-in unit in the present invention.

[0028] Figure 6 It is a partial cross-sectional view of the mounting plate, abutting wheel, friction disc and clamping plate in the present invention.

[0029] Figure 7 It is a partial structural diagram of the support plate, the abutting wheel and the connecting plate in the present invention.

[0030] Figure 8 It is a schematic diagram of the local structure when the auxiliary wheels are hung on the upper side of the bridge for mobile flaw detection in the present invention.

[0031] Figure 9 It is a side view of the flaw detector and the support ring in the present invention when performing flaw detection on the side of a bridge that is not perpendicular to the ground.

[0032] In the figure: 1. frame; 2. mounting plate; 3. flaw detector; 4. guide mechanism; 5. distance stabilizing mechanism; 41. moving plate; 42. walking wheel; 43. adjusting assembly; 44. auxiliary wheel; 45. positioning hole; 46. slot opening; 47. locking piece; 48. guide column; 51. abutting wheel; 52. stop assembly; 53. limiting column; 54. support plate; 431. lifting plate; 432. angle adjustment plate; 433. sliding plate frame; 434. flip block; 441. supporting ring; 442. screw; 451. pin; 461. plug column; 462. arc waist groove; 471. square plug-in; 472. inclined groove; 511. friction plate; 512. splint; 513. fixed frame; 514. damping telescopic rod; 515. connecting plate; 521. linkage plate; 522. locking rod; 523. wedge plate. DETAILED DESCRIPTION

[0033] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0034] See Figure 1An automatic flaw detection device for highway bridges includes a frame 1, a mounting plate 2 is provided inside the frame 1 for sliding back and forth, a flaw detector 3 is fixedly installed on the front side of the mounting plate 2, the device also includes a guide mechanism 4 for allowing the flaw detector 3 to move stably on the side of the bridge with different inclination angles to the ground, and a distance stabilizing mechanism 5 for ensuring that the distance between the flaw detector 3 and the side of the bridge is always consistent during operation.

[0035] When it is necessary to perform flaw detection on a bridge, the position of the guide mechanism 4 is first adjusted according to the flaw detection position. The operator holds the frame 1 so that the frame 1 rests on the flaw detection position of the bridge through the stabilizing mechanism 5. Then the operator manually drives the frame 1 to move so that the frame 1 drives the flaw detector 3 to move synchronously through the mounting plate 2, thereby performing flaw detection on the bridge.

[0036] During the detection process, the guide mechanism 4 guides the frame 1 to ensure the movement stability of the flaw detector 3. At the same time, the distance stabilizing mechanism 5 controls the distance between the flaw detector 3 and the side of the bridge to be always consistent, thereby ensuring the accuracy of the flaw detection results.

[0037] See Figure 1 and Figure 2 The guide mechanism 4 includes a movable plate 41 that is set on the rear side of the frame 1 for sliding back and forth through a guide column 48. A walking wheel 42 is rotatably set on the rear side of the movable plate 41. Two auxiliary wheels 44 arranged left and right are set on the movable plate 41 through an adjustment component 43. The adjustment component 43 moves and flips the auxiliary wheels 44, so that the auxiliary wheels 44 guide the movement of the frame 1 by hanging and supporting.

[0038] See Figure 1 、 Figure 2 and Figure 4 The adjustment component 43 includes two lifting plates 431 arranged on the left and right sides and sliding up and down on the front side of the movable plate 41. An angle adjustment plate 432 is rotatably provided on the upper side of the lifting plate 431. A sliding plate frame 433 is slidably provided on the upper side of the angle adjustment plate 432. A flip block 434 is rotatably provided on the rear side of the sliding plate frame 433. The flip block 434 is rotatably connected to the auxiliary wheel 44.

[0039] It should be noted that a No. 1 spring is provided between the outer side of the guide column 48 and the frame 1. In the initial state, the No. 1 spring pushes the guide column 48 backward by its own elastic force, so that the guide column 48 drives the lifting plate 431 to move backward synchronously through the movable plate 41, so that the lifting plate 431 does not contact the frame 1. In the initial state, the angle adjustment plate 432 is located in front of the movable plate 41, and the rear side surface of the angle adjustment plate 432 is attached to the front side surface of the movable plate 41, so that the angle adjustment plate 432 is arranged parallel to the lifting plate 431.

[0040] In the initial state, the flip block 434 drives the auxiliary wheel 44 to be arranged coaxially with the traveling wheel 42 at the corresponding position. It should be noted that the outer diameter of the auxiliary wheel 44 is consistent with that of the traveling wheel 42. When there is an obstruction on the upper side of the bridge position to be inspected, the auxiliary wheel 44 cannot be extended upward, and the auxiliary wheel 44 can be moved on the side of the bridge like the traveling wheel 42, thereby increasing the width of the traveling wheel 42 and improving the movement stability.

[0041] See Figure 2 and Figure 4 A plurality of positioning holes 45 are provided on the lifting plate 431 at equal intervals in the vertical direction. Two symmetrically arranged pins 451 are fixedly mounted on the upper rear end of the frame 1 . The pins 451 are used to be inserted into the corresponding positioning holes 45 .

[0042] In the initial state, the pin 451 is completely located in front of the lifting plate 431, so that the lifting plate 431 can slide freely up and down.

[0043] See Figure 4 and Figure 5 Two slots 46 are symmetrically arranged front and back on the side of the lower end of the angle adjustment plate 432 away from the middle of the frame 1. A plug column 461 is provided on the lifting plate 431 for sliding in the vertical direction. An arc-shaped waist groove 462 is provided on the side of the lower end of the angle adjustment plate 432 close to the middle of the frame 1. The upper side of the lifting plate 431 is slidably connected to the inside of the arc-shaped waist groove 462 through a raised column.

[0044] It should be noted that a No. 2 spring is provided between the plug post 461 and the lifting plate 431. In the initial state, the plug post 461 is located between the two slot openings 46, so that the No. 2 spring pushes the upper side surface of the plug post 461 against the lower side surface of the angle adjustment plate 432 through its own elastic force.

[0045] See Figure 2 、 Figure 4 and Figure 5 A locking member 47 is provided inside the sliding plate frame 433 for sliding back and forth. The front part of the locking member 47 is a plate-shaped structure and the rear part is a columnar structure. Three square plug-ins 471 arranged front and back are provided on the inner side of the sliding plate frame 433 for sliding up and down. Three inclined grooves 472 are provided on the plate structure of the locking member 47. The locking member 47 is slidably connected to the corresponding inclined groove 472 through the linkage column thereon.

[0046] See Figure 4 and Figure 5 A coil spring is provided between the locking member 47 and the sliding plate frame 433. Locking holes for inserting the locking member 47 are provided on the side of the rotating shaft of the auxiliary wheel 44 and the flip block 434, and a rectangular hole for inserting the square plug-in 471 is provided on the upper side of the angle adjustment plate 432.

[0047] It should be noted that the inclined groove 472 is a structure that gradually tilts downward from back to front. In the initial state, the square plug-in 471 located in the middle position on the sliding plate frame 433 corresponds to the position of the rectangular hole on the angle adjustment plate 432. At the same time, the coil spring pushes the locking member 47 backward through its own elastic force, and the locking member 47 pushes the three square plug-ins 471 downward at the same time through the inclined groove 472. The middle square plug-in 471 is inserted into the rectangular hole, thereby locking the sliding plate frame 433 and the angle adjustment plate 432 into a whole.

[0048] In the initial state, the locking hole on the flip block 434 is coaxially arranged with the columnar structure of the locking member 47, and the columnar structure of the locking member 47 is inserted into the locking hole of the flip block 434, thereby locking the flip block 434 and the sliding plate frame 433 into a whole.

[0049] When it is necessary to inspect the upper side of the bridge and there is no obstruction on the upper part of the bridge inspection position, the operator manually extends the lifting plate 431 upward, so that the lifting plate 431 drives the auxiliary wheel 44 to move upward synchronously, and then the operator manually pulls the locking piece 47 forward, so that the columnar structure of the locking piece 47 exits the locking hole of the flip block 434, and the locking piece 47 drives the middle square plug-in 471 to exit the rectangular hole of the angle adjustment plate 432.

[0050] It should be noted that if Figure 4 As shown, a handle extending upward to the outside of the sliding plate frame 433 is fixedly installed on the upper part of the columnar structure of the locking member 47, and the operator drives the locking member 47 to move by pulling the handle.

[0051] The operator then manually flips the auxiliary wheel 44 so that the axis of the auxiliary wheel 44 is arranged perpendicular to the axis of the walking wheel 42. At this time, the locking hole on the rotating shaft of the auxiliary wheel 44 is arranged coaxially with the columnar structure of the locking member 47. The operator then manually pushes the sliding plate frame 433 backward, so that the sliding plate frame 433 drives the square plug-in 471 at the front to move to the position corresponding to the rectangular hole of the angle adjustment plate 432.

[0052] Then, the external force on the locking member 47 is removed, so that the auxiliary wheel 44, the sliding plate frame 433 and the angle adjustment plate 432 are locked into a whole again. Then, the operator moves the frame 1 to the position of the bridge and hangs the auxiliary wheel 44 on the upper side of the bridge. Figure 8 As shown, the flaw detector 3 is moved to the position on the bridge to be inspected, and then the operator pushes the frame 1 toward the bridge, so that the frame 1 drives the walking wheels 42 to rest against the side of the bridge through the movable plate 41. Then the operator continues to push the frame 1, so that the frame 1 moves backward relative to the movable plate 41 until it is in contact with the lifting plate 431.

[0053] At the same time, the frame 1 drives the pin 451 to be inserted into the positioning hole 45 at the corresponding position, so that the lifting plate 431 and the movable plate 41 are locked into a whole, thereby offsetting the gravity of the frame 1 and the flaw detector 3 through the support force of the auxiliary wheel 44 on the upper side of the bridge. At the same time, the auxiliary wheel 44 moves along the upper side of the bridge to guide the upper and lower positions of the flaw detector 3 during movement, thereby ensuring the stability of the movement of the flaw detector 3.

[0054] When it is necessary to inspect the lower side of the bridge, the axis of the auxiliary wheel 44 is also flipped so that it is arranged perpendicular to the axis of the walking wheel 42. Then the operator pushes the sliding plate frame 433 forward, so that the sliding plate frame 433 drives the square plug-in 471 at the rear to move to the position corresponding to the rectangular hole of the angle adjustment plate 432. At this time, the rotation center of the auxiliary wheel 44 is located on the axis of the walking wheel 42, and then the frame 1 is flipped so that the auxiliary wheel 44 is located below the flaw detector 3.

[0055] As a result, the auxiliary wheel 44 moves downward under the action of gravity until it rests against the ground or the lower platform. The operator then pushes the frame 1 to lock the lifting plate 431, so that the supporting force of the ground or the lower platform on the auxiliary wheel 44 offsets the gravity of the frame 1 and the flaw detector 3, thereby ensuring the stability of the movement of the flaw detector 3.

[0056] It should be noted that an extended lifting plate 431 can be used according to actual needs to facilitate flaw detection closer to the middle of the bridge.

[0057] When the lifting plate 431 is locked with the movable plate 41, the operator manually rotates the angle adjustment plate 432, so that the angle adjustment plate 432 drives the auxiliary wheel 44 to deflect through the sliding plate frame 433. When the angle adjustment plate 432 drives the slot opening 46 thereon to correspond to the position of the plug post 461, the No. 2 spring pushes the plug post 461 upward through its own elastic force and inserts it into the slot opening 46, thereby locking the angle adjustment plate 432 and the lifting plate 431 together.

[0058] like Figure 8 As shown, at the same time, the movement direction of the auxiliary wheel 44 is deflected toward a position close to the bridge relative to the movement direction of the running wheel 42, so that when the auxiliary wheel 44 moves on the bridge, the ground or the upper platform, it pulls the movable plate 41 toward a position close to the bridge, so that the movable plate 41 drives the running wheel 42 to move close to the side of the bridge.

[0059] See Figure 2 、 Figure 4 、 Figure 5 and Figure 9 A support ring 441 is provided on the upper side of the auxiliary wheel 44 for sliding along its axial direction. A screw 442 threadedly connected to the support ring 441 is rotatably provided on the auxiliary wheel 44. The upper part of the support ring 441 is an annular column structure.

[0060] When the auxiliary wheel 44 is hung on the upper side of the bridge, and the inspection surface of the bridge is in an inclined structure that gradually protrudes from bottom to top, as shown in FIG. Figure 9 As shown, the movable plate 41 drives the auxiliary wheel 44 to rest against the bridge in a non-perpendicular manner to the upper side of the bridge. At this time, the operator manually rotates the screw 442 so that the screw 442 drives the support ring 441 to extend out of the auxiliary wheel 44, and causes the annular column structure of the support ring 441 to rest against the upper side of the bridge, thereby increasing the support points and ensuring the stability of the flaw detector 3 in moving on the inclined side of the bridge.

[0061] See Figure 1 、 Figure 2 and Figure 6 The distance stabilizing mechanism 5 includes a supporting wheel 51 which is arranged at the upper end of the rear side of the mounting plate 2 and is rotated by a support plate 54. A pushing spring for pushing the mounting plate 2 backward is arranged between the mounting plate 2 and the frame 1. The distance stabilizing mechanism 5 also includes a stopping component 52 for stopping the movement of the flaw detector 3 when the distance between the flaw detector 3 and the side of the bridge changes.

[0062] See Figure 1 、 Figure 2 and Figure 3 The stop assembly 52 includes a linkage disk 521 fixedly mounted on the shaft of the traveling wheel 42. Rectangular grooves are provided on the linkage disk 521 at equal intervals along its circumference. Two locking rods 522 arranged left and right are provided on the mounting plate 2 for sliding in the vertical direction. A return spring is provided between the locking rod 522 and the mounting plate 2. Two wedge plates 523 for pushing the locking rod 522 upward are fixedly mounted on the frame 1.

[0063] In the initial state, the return spring pushes the locking rod 522 downward by its own elastic force, so that the lower side of the rear end of the locking rod 522 is inserted into the rectangular groove of the linkage disk 521, so that the linkage disk 521 and the locking rod 522 are locked together, thereby preventing the walking wheel 42 from rotating.

[0064] When the frame 1 rests on the lifting plate 431, the frame 1 drives the wedge plate 523 to move to the position of the locking rod 522, and the wedge plate 523 pushes the locking rod 522 upward through the inclined surface, so that the locking rod 522 exits the rectangular groove of the linkage disk 521, so that the flaw detector 3 is at a fixed distance from the side of the bridge. Only then can the operator push the flaw detector 3 to move on the bridge for flaw detection, thereby ensuring that the distance between the flaw detector 3 and the side of the bridge is always consistent during detection.

[0065] See Figure 1 、 Figure 6 and Figure 7A friction disc 511 is fixedly installed on the upper side of the abutting wheel 51, and two symmetrically arranged clamping plates 512 are provided on the upper side of the support plate 54 to slide up and down through the driving structure. The clamping plates 512 are used to clamp the friction disc 511, thereby slowing down the abutting wheel 51.

[0066] See Figure 1 and Figure 6 A hemispherical groove is provided on the lower side of the support plate 54 , and a limiting column 53 is provided on the movable plate 41 for sliding in the vertical direction. The upper part of the limiting column 53 is a dome structure, and a compression spring is provided between the limiting column 53 and the movable plate 41 .

[0067] In the initial state, the compression spring pushes the limit column 53 upward through its own elastic force, so that the dome structure of the limit column 53 is inserted into the hemispherical groove, thereby locking the support plate 54 and the movable plate 41 together, preventing the mounting plate 2 from causing the flaw detector 3 to slide, and ensuring the stability of the flaw detector 3 when performing flaw detection in the flat area of the bridge.

[0068] It should be noted that if Figure 6 and Figure 7 As shown, the driving structure includes a fixed frame 513 fixedly mounted on the upper part of the support plate 54, the fixed frame 513 is connected to the clamping plate 512 for sliding up and down, a damping telescopic rod 514 is fixedly mounted on the upper end of the rear side of the frame 1, and the rear end of the damping telescopic rod 514 is hinged to the two clamping plates 512 through two connecting plates 515. In the initial state, the two clamping plates 512 are in a position away from each other and not in contact with the friction disk 511, and the two connecting plates 515 are arranged parallel to each other.

[0069] It should be noted that a No. 3 spring is provided between the two clamping plates 512 .

[0070] When the operator holds the frame 1 and drives the flaw detector 3 to the arc area of the bridge, the arc area of the bridge pushes the abutment wheel 51 away from the bridge, so that the abutment wheel 51 drives the mounting plate 2 to move forward relative to the walking wheel 42 through the support plate 54, and at the same time causes the hemispherical groove to push the limit column 53 downward, causing the dome structure of the limit column 53 to no longer be located inside the hemispherical groove.

[0071] The push spring pushes the mounting plate 2 backward by its own elastic force, so that the mounting plate 2 drives the abutting wheel 51 to always move against the bridge through the support plate 54, thereby making the mounting plate 2 drive the flaw detector 3 to always maintain a certain distance from the bridge.

[0072] When the mounting plate 2 moves relative to the frame 1, the fixed frame 513 drives the clamping plate 512 to move synchronously, and the clamping plate 512 pushes the telescopic section of the damping telescopic rod 514 through the connecting plate 515. When the flaw detector 3 moves too fast, causing the distance between the flaw detector 3 and the frame 1 to change too quickly, the damping telescopic rod 514 pushes and pulls the connecting plate 515 through its telescopic section, so that the connecting plate 515 drives the two clamping plates 512 to approach each other, thereby clamping the clamping plates 512 on the friction disk 511, thereby reducing the rotation speed of the friction disk 511 and the abutting wheel 51.

[0073] By limiting the rotational speed of the abutment wheel 51, sliding friction occurs between the abutment wheel 51 and the side of the bridge, thereby reducing the moving speed of the flaw detector 3 on the bridge, thereby preventing the repeated bouncing problem caused by the rapid change of the distance between the flaw detector 3 and the bridge, and further ensuring that the distance between the flaw detector 3 and the side of the bridge remains unchanged.

[0074] When the flaw detector 3 moves to the end point of the bridge inspection area, the flaw detector 3 stops moving, and the inspection result of the bridge is analyzed by the data recorded by the flaw detector 3. If the recorded data is within the calibration range, the inspection is qualified, otherwise it is unqualified.

[0075] See Figures 1-9 When performing flaw detection on a bridge, the present invention further includes the following steps: In the first step, the operator manually flips the auxiliary wheel 44 and locks it with the sliding plate frame 433. Then, the operator moves the handheld frame 1 to the position of the bridge and hangs the auxiliary wheel 44 on the upper side of the bridge or the supporting ground or the lower platform, and at the same time moves the flaw detector 3 to the position on the bridge to be detected.

[0076] In the second step, the operator pushes the frame 1 toward the bridge, so that the frame 1 drives the traveling wheel 42 to rest against the side of the bridge through the movable plate 41, and at the same time locks the lifting plate 431 and the movable plate 41 into a whole. The operator manually rotates the angle adjustment plate 432, so that the movement direction of the auxiliary wheel 44 is deflected toward a position close to the bridge relative to the movement direction of the traveling wheel 42.

[0077] In the third step, the operator holds the frame 1 and drives the flaw detector 3 to move on the bridge for flaw detection. When it moves to the arc area of the bridge, the abutment wheel 51 drives the mounting plate 2 to move forward relative to the walking wheel 42 through the support plate 54, so that the flaw detector 3 always maintains a certain distance from the bridge.

[0078] In the fourth step, when the flaw detector 3 moves too fast, the two clamps 512 are clamped on the friction disk 511, and then the speed of the flaw detector 3 on the bridge is reduced by limiting the rotation speed of the abutment wheel 51, thereby preventing the repeated bouncing problem caused by the rapid change of the distance between the flaw detector 3 and the bridge, and further ensuring that the distance between the flaw detector 3 and the side of the bridge remains unchanged.

[0079] In the fifth step, the flaw detector 3 moves to the end point of the bridge inspection area, stops moving the flaw detector 3, and analyzes the inspection results of the bridge through the data recorded by the flaw detector 3. If the recorded data is within the calibration range, the inspection is qualified, otherwise it fails.

[0080] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered by the scope of protection of the present invention.

Claims

1. An automatic flaw detection device for highway bridges, comprising a frame, characterized in that: A mounting plate is installed inside the frame for sliding back and forth, with a flaw detector fixedly mounted on the front side of the mounting plate. The device also includes a guide mechanism for allowing the flaw detector to move stably on the side of the bridge with different inclinations to the ground, and a distance stabilization mechanism for ensuring that the distance between the flaw detector and the side of the bridge is always consistent during operation. The guide mechanism includes a movable plate arranged on the rear side of the frame and sliding forward and backward through a guide column. A running wheel is rotatably arranged on the rear side of the movable plate. Two auxiliary wheels arranged left and right are provided on the movable plate through an adjustment component. The adjustment component moves and flips the auxiliary wheels so that the auxiliary wheels guide the movement of the frame by hanging and supporting. The distance stabilizing mechanism includes an abutment wheel arranged at the upper end of the rear side of the mounting plate through the rotation of the support plate, and a push spring for pushing the mounting plate backward is arranged between the mounting plate and the frame. The distance stabilizing mechanism also includes a stop component for stopping the movement of the flaw detector when the distance between the flaw detector and the side of the bridge changes.

2. The automatic flaw detection equipment for highway bridges according to claim 1 is characterized in that: The adjustment assembly includes two lifting plates arranged on the left and right sides and sliding up and down on the front side of the movable plate. An angle adjustment plate is rotatably provided on the upper side of the lifting plate. A sliding plate frame is slidably provided on the upper side of the angle adjustment plate. A flip block is rotatably provided on the rear side of the sliding plate frame. The flip block is rotatably connected to the auxiliary wheel.

3. The automatic flaw detection equipment for highway bridges according to claim 2 is characterized in that: The lifting plate is provided with a plurality of positioning holes at equal intervals in the vertical direction, and two pins arranged symmetrically on the upper rear end of the frame are fixedly mounted, and the pins are used to be inserted into the corresponding positioning holes.

4. The automatic flaw detection equipment for highway bridges according to claim 2 is characterized in that: Two slots are symmetrically arranged front and back on the side of the lower end of the angle adjustment plate away from the middle of the frame. A plug column is provided on the lifting plate for sliding in the vertical direction. An arc-shaped waist groove is provided on the side of the lower end of the angle adjustment plate close to the middle of the frame. The upper side of the lifting plate is slidably connected to the inside of the arc-shaped waist groove through a raised column.

5. The automatic flaw detection equipment for highway bridges according to claim 2 is characterized in that: A locking piece is provided inside the sliding plate frame for sliding back and forth, and three square plug-ins arranged front and back are provided inside the sliding plate frame for sliding up and down. Three inclined grooves are provided on the locking piece, and the locking piece is slidably connected to the corresponding inclined grooves through the linkage column thereon.

6. The automatic flaw detection equipment for highway bridges according to claim 5 is characterized in that: A coil spring is provided between the locking member and the sliding plate frame. Locking holes for inserting the locking member are provided on the rotating shaft of the auxiliary wheel and the side surface of the flip block. A rectangular hole for inserting a square plug-in is provided on the upper side of the angle adjustment plate.

7. The automatic flaw detection equipment for highway bridges according to claim 1 is characterized in that: A support ring is provided on the upper side of the auxiliary wheel for sliding along its axial direction. A screw connected with the support ring through a thread is rotatably provided on the auxiliary wheel. The upper part of the support ring is an annular column structure.

8. The automatic flaw detection equipment for highway bridges according to claim 1 is characterized in that: The stopping assembly includes a linkage disk fixedly mounted on the shaft of the traveling wheel, rectangular grooves being provided on the linkage disk at equal intervals along its circumference, two locking rods arranged on the left and right being slidable in the vertical direction on the mounting plate, a return spring being provided between the locking rod and the mounting plate, and two wedge plates being fixedly mounted on the frame for pushing the locking rod upward.

9. The automatic flaw detection equipment for highway bridges according to claim 1, characterized in that: A friction disc is fixedly mounted on the upper side of the abutting wheel, and two clamping plates arranged symmetrically up and down are provided on the upper side of the support plate through a driving structure for sliding up and down. The clamping plates are used to clamp the friction disc, thereby slowing down the abutting wheel.

10. The automatic flaw detection equipment for highway bridges according to claim 1, characterized in that: A hemispherical groove is provided on the lower side of the support plate, and a limiting column is provided on the movable plate for sliding in the vertical direction. The upper part of the limiting column is a dome structure, and a compression spring is provided between the limiting column and the movable plate.

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