A bridge crack detection device and detection method

Abstract

This invention discloses a bridge crack detection device and method, relating to the field of bridge crack detection technology. It includes a mobile platform, with the bottom of the L-shaped side panel frame connected to the main body of the crack detector via an adjuster. A lateral positioning component for fixed-distance detection of the crack detector is provided on one side of the main body. By incorporating a fixed-position component and an adjuster, the invention allows the motor to be activated after the mobile platform is moved to the edge of the bridge. This prevents the bridge railings from obstructing crack detection and improves the smoothness of the detection process, thereby increasing detection efficiency. The crack detector is moved to one side of the bridge by the fixed-position component. At this point, the operator can manually rotate the rotating disc. The rotation of the disc, along with the adjustment screw, moves the movable frame, thus adjusting the distance between the crack detector and the side of the bridge, thereby improving the accuracy of the detection data.

Description

Technical Field

[0001] This invention relates to the field of bridge crack detection technology, specifically a bridge crack detection device and detection method. Background Technology

[0002] Cracks on the surface of concrete bridges are abrupt changes in the process of internal damage accumulation, and are a concentrated manifestation of the dangerous level reached by internal damage. Therefore, they contain a lot of information and are of key significance for predicting and indicating bridge dangers. Thus, it is necessary to detect cracks in bridges to prevent problems before they occur.

[0003] In existing technologies, crack detection is mainly carried out using handheld detectors. However, when inspecting the side of a bridge, workers need to place the detector on one side of the bridge using a connecting rod, and then walk around to inspect the side of the bridge. During this process, the obstruction of the guardrails on both sides of the bridge makes it extremely inconvenient for workers to move the handheld detector. At the same time, the distance between the detector and the side of the bridge may change during the movement, which will affect the accuracy of the detection data. Summary of the Invention

[0004] The purpose of this invention is to provide a bridge crack detection device and method to solve the problem of inconvenience in inspecting the sides of bridges.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bridge crack detection device, comprising a mobile platform, a first support mounted on the top of the mobile platform, a second support disposed on the top of the mobile platform away from the first support, a motor mounted on one side of the first support, an L-shaped side plate frame connected to the top of the first support via a fixed swing member, the first support and the second support being connected via the fixed swing member, the bottom of the L-shaped side plate frame being connected to the crack detector body via a distance adjuster, and a clamping side positioning component for performing distance detection on one side of the crack detector body.

[0006] As a further embodiment of the present invention: the fixed swing component includes a worm gear connected to the output end of the motor; the top of the first support is rotatably connected to a pivot frame via a rotating shaft; the bottom of the pivot frame is provided with a worm wheel located inside the first support, the worm wheel meshing with the worm; a pull spring is installed inside the pivot frame; a locking block is connected to the top of the pull spring; the locking block and the pivot frame are slidably connected via a sliding groove; a fixed pulley is installed on one side of the top of the pivot frame; a fixed shaft is provided on the top of the second support; a traction rope is fixed to the top of the locking block; the traction rope passes around the fixed pulley and is connected to the fixed shaft; a driven spur gear is rotatably connected to one side of the locking block via a bearing; a fixed gear connecting bar is fixed to one side of the pivot frame, the fixed gear connecting bar meshing with the driven spur gear; a transverse rod is fixed to one end of the driven spur gear; an L-shaped side plate frame is fixed to one end of the transverse rod; and a weight adjustment unit connected to the moving vehicle plate is connected to one end of the worm gear.

[0007] As a further embodiment of the present invention: the weight adjustment unit includes a connecting rod fixed to one end of the worm gear, a push-connecting screw fixed to one end of the connecting rod, a limiting groove is formed on the top of the moving plate, the limiting groove is located below the push-connecting screw, a guide block is sleeved on the outer side of the push-connecting screw, the bottom of the guide block is located inside the limiting groove, a counterweight is fixed to one end of the guide block, and fixed locking blocks are fixed on both sides of the guide block, the fixed locking blocks being located between the first support and the second support.

[0008] As a further embodiment of the present invention: the adjusting device includes an adjusting screw rotatably connected to the inner side of the bottom of the L-shaped side plate frame via a bearing. One end of the adjusting screw is fixed with a connecting plate. The outer side of the connecting plate has multiple anti-rotation holes, which are evenly distributed along the center of the connecting plate. A movable frame extending to the bottom of the L-shaped side plate frame is sleeved on the outer side of the adjusting screw. A U-shaped plug is inserted into one side of the movable frame, and the U-shaped plug extends to the other side of the movable frame. A positioning spring connected to the movable frame is installed on the inner side of the U-shaped plug. A limiting plate is fixed to one end of the U-shaped plug. A mounting base is installed at one end of the limiting plate. The main body of the crack detector is installed at one end of the mounting base.

[0009] As a further embodiment of the present invention: the two sides of the L-shaped side plate frame are provided with sliding grooves that fit with the top of the movable frame, and the top of the movable frame is provided with a threaded hole that fits with the adjusting screw.

[0010] As a further embodiment of the present invention: the clamping side positioning assembly includes a fixed rod fixed to one end of the limiting plate, the fixed rod being located on both sides of the crack detector body, one end of the fixed rod being rotatably connected to an anti-slip wheel via a bearing, the two sides of the L-shaped side plate frame being rotatably connected to a rectangular rotating rod via bearings, one end of the rectangular rotating rod being fixed to a tilting spur gear, an L-shaped blocking plate being sleeved on the outer side of the rectangular rotating rod, one end of the L-shaped blocking plate being fixed to a rotating connecting sleeve, the rotating connecting sleeve being rotatably connected to the inner side of the movable frame via a bearing, one side of the L-shaped side plate frame being rotatably connected to a shifting screw via a rotating shaft, the outer side of the shifting screw being sleeved to a shaped movable connecting frame, the shaped movable connecting frame being slidably connected to the L-shaped side plate frame via a sliding groove, a locking pin being fixed at the bottom of the shaped movable connecting frame, the locking pin being located above the rotating connecting plate, pressure connecting racks being fixed on both sides of the shaped movable connecting frame, the pressure connecting racks meshing with the tilting spur gear, and a rotating cleaning unit being provided on the outer side of the fixed rod.

[0011] As a further embodiment of the present invention: the inner wall diameter of the rotating sleeve is greater than the length and width of the rectangular rotating rod, and the top of the L-shaped blocking plate is provided with a through hole that matches the rectangular rotating rod.

[0012] As a further embodiment of the present invention: the rotating cleaning unit includes a side clamping plate fixed to one side of the fixed rod, a second transmission bevel gear fixed to the top of the anti-slip wheel, the second transmission bevel gear being located above the fixed rod, a clamping shaft being rotatably connected to one side of the side clamping plate via a bearing, the clamping shaft extending to the other side of the side clamping plate, a first transmission bevel gear fixed to one end of the clamping shaft, the first transmission bevel gear meshing with the second transmission bevel gear, a synchronous pulley fixed to the end of the clamping shaft away from the first transmission bevel gear, a synchronous belt sleeved on the outer side of the synchronous pulley, an annular brush provided on the outer side of the synchronous belt, and a supplementary block located inside the synchronous belt provided on one side of the side clamping plate.

[0013] As a further embodiment of the present invention: the number of synchronous pulleys is set to two, and the two synchronous pulleys are symmetrically arranged along the transverse central axis of the side connecting plate.

[0014] This invention also discloses a method for detecting bridge cracks, which uses the aforementioned bridge crack detection device and includes the following steps:

[0015] S1: When inspecting cracks on the side of a bridge, first move the mobile platform to the edge of the bridge;

[0016] S2: Then start the motor. When the motor is running, it rotates through the worm gear and worm wheel, which causes the indexing frame to swing relative to the first support. During this process, the distance between one end of the indexing frame and the guide shaft increases. The traction rope can then move the locking block relative to the indexing frame, thus moving the locking block upward, which in turn drives the pull spring to stretch. During this process, the rotating spur gear will rotate along the fixed tooth connecting bar, which will cause the L-shaped side plate frame to rotate relative to the locking block. This moves the L-shaped side plate frame, which was originally located on the top of the moving vehicle, over the guardrail and to one side of the bridge. This allows the main body of the crack detector to be accurately moved to one side of the bridge, thus preventing the guardrail on the bridge from obstructing crack detection and improving the smoothness of the detection, thereby improving detection efficiency.

[0017] S3: When the motor drives the worm gear to rotate, causing the indexing frame to rotate relative to the first support, the connecting rod will rotate with the worm gear. At this time, the connecting screw will rotate with the connecting rod, so that the guide block limited by the limiting groove can move along the connecting screw in a direction away from the second support. This allows the counterweight to move away from the moving platform. When the L-shaped side panel frame crosses the guardrail and turns to the side of the bridge, the counterweight moves to the farthest distance from the moving platform. In this way, the counterweight can be used to increase the weight on one side of the moving platform, so that the gravity on both sides of the moving platform is balanced, thereby increasing the stability of the moving platform.

[0018] S4: At this time, the staff can manually rotate the rotating plate. When the rotating plate rotates, the movable frame can be moved by adjusting the distance screw. In this way, the distance between the main body of the crack detector and the side of the bridge can be adjusted, thereby improving the accuracy of the detection data.

[0019] S5: During the rotation of the adjusting screw, the fixed rod and the main body of the crack detector will move closer to the side of the bridge along with the movement of the movable frame. When the anti-slip wheel contacts the side of the bridge, continue rotating the rotating disc. At this time, the U-shaped insert will move relative to the movable frame. During this process, the supplementary spring extends. As the movable frame moves, the limiting plate can contact the L-shaped blocking plate. At this time, the rotating disc will be limited and cannot continue to rotate. Then, rotate the shifting screw. The rotation of the shifting screw causes the irregular moving frame to drive the locking pin and the pressure rack to move downward, so that the locking pin is inserted into the rotating disc, thereby limiting the rotating disc and preventing the adjusting screw from rotating relative to the L-shaped side plate frame due to equipment vibration during the movement of the moving vehicle. With the added stability of the movable frame, when the pressure rack moves downward, it can actuate the tilting spur gear to rotate. This causes the tilting spur gear to drive the L-shaped obstruction plate to rotate via the rectangular rotating rod, thereby separating the L-shaped obstruction plate from the U-shaped insert. At this time, there will be a certain space between the limiting plate and the movable frame. This allows the fixed rod to be pushed towards the side of the bridge under the elastic restoring force of the supplementary spring. At the same time, the limiting plate will also be squeezed by the protrusion on the side of the bridge, which will continue to stretch the supplementary spring. This allows the limiting plate to have room to move left and right, so that the fixed rod is always in contact with the side of the bridge when the equipment moves. This ensures that the main body of the crack detector is always at the same distance from the side of the bridge, thus guaranteeing the stability of the detection and improving the detection effect.

[0020] S6: When the moving platform moves, the anti-slip wheels are in contact with one side of the bridge, which allows the anti-slip wheels to drive the synchronous pulley to rotate through the second and first transmission bevel gears. The rotation of the synchronous pulley drives the synchronous belt to rotate, which in turn causes the annular brush to rotate with the synchronous belt. This cleans the front and rear of the crack detector body in the direction of movement, preventing dust on the side of the bridge from obscuring the cracks and thus improving the accuracy of the equipment's detection.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. By setting a fixed swing element and adjusting the distance, the motor can be started after the moving platform is moved to the edge of the bridge. When the motor is running, it rotates through a worm gear and worm wheel, causing the shifting frame to swing relative to the first support. During this process, the distance between one end of the shifting frame and the guide shaft increases. The traction rope can then move the locking block relative to the shifting frame, causing the locking block to move upward, thereby stretching the pull spring. During this process, the rotating spur gear will rotate along the fixed gear connecting bar, causing the L-shaped side plate frame to rotate relative to the locking block, thus shifting the original... The L-shaped side panel frame located on top of the mobile platform moves over the guardrail to one side of the bridge, allowing the main body of the crack detector to be precisely moved to one side of the bridge. This prevents the guardrail on the bridge from obstructing crack detection and also improves the smoothness of the detection process, thereby increasing detection efficiency. The main body of the crack detector moves to one side of the bridge under the action of the fixed swing component. At this time, the operator can manually rotate the rotating connecting plate. When the rotating connecting plate rotates, the movable frame can be moved through the adjusting screw, thus adjusting the distance between the main body of the crack detector and the side of the bridge, thereby improving the accuracy of the detection data.

[0023] 2. By setting up a clamping side positioning component, during the rotation of the adjusting screw, the fixed rod and the main body of the crack detector will move closer to the side of the bridge along with the movement of the movable frame. When the anti-slip wheel contacts the side of the bridge, continue rotating the rotating disc. At this time, the U-shaped insert will move relative to the movable frame. During this process, the supplementary spring extends. As the movable frame moves, the limiting plate can contact the L-shaped blocking plate. At this time, the rotating disc will be limited and cannot continue to rotate. Then, rotate the shifting screw. The rotation of the shifting screw causes the irregular moving connecting frame to drive the clamping pin and the pressing rack to move downward, so that the clamping pin is inserted into the rotating disc, thereby limiting the rotating disc and preventing the adjusting screw from being damaged by equipment vibration during the movement of the moving vehicle. Rotating the L-shaped side plate frame increases the stability of the movable frame. When the pressure rack moves downward, it can actuate the tilting spur gear to rotate, causing the tilting spur gear to drive the L-shaped blocking plate to rotate through the rectangular rotating rod. This separates the L-shaped blocking plate from the U-shaped insert block. At this time, there will be a certain space between the limiting plate and the movable frame. This allows the fixed rod to be pushed towards the bridge side under the elastic restoring force of the supplementary spring. At the same time, the limiting plate will also be squeezed by the protrusion on the bridge side, which will continue to stretch the supplementary spring. This allows the limiting plate to have room to move left and right, so that the fixed rod is always in contact with the bridge side when the equipment moves. This ensures that the main body of the crack detector is always at the same distance from the bridge side, thereby improving the detection effect.

[0024] 3. By setting up a weight adjustment unit, when the motor drives the worm gear to rotate the indexing frame relative to the first support, the connecting rod will rotate with the worm gear. At this time, the push connecting screw will rotate with the connecting rod, so that the guide slider limited by the limiting groove can move away from the second support along the push connecting screw. This allows the counterweight to move away from the moving platform. When the L-shaped side plate frame crosses the guardrail and turns to the side of the bridge, the counterweight moves to the farthest distance from the moving platform. In this way, the counterweight can be used to increase the weight on one side of the moving platform, so that the gravity on both sides of the moving platform is balanced. This achieves synchronous counterweighting of the moving platform, thereby increasing the stability of the moving platform.

[0025] 4. By setting up a rotating cleaning unit, when the moving platform moves, the anti-slip wheels are in contact with one side of the bridge. This allows the anti-slip wheels to drive the synchronous pulley to rotate through the second and first transmission bevel gears. The rotation of the synchronous pulley drives the synchronous belt to rotate, which in turn causes the annular brush to rotate with the synchronous belt. This cleans the front and rear of the crack detector body in the direction of movement, preventing dust on the side of the bridge from obscuring the cracks and thus improving the accuracy of the equipment's detection. Attached Figure Description

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram showing the connection between the first support and the indexing frame of the present invention;

[0028] Figure 3 This is a schematic diagram showing the connection between the L-shaped side plate frame and the main body of the crack detector of the present invention;

[0029] Figure 4 This is a schematic diagram showing the connection between the irregularly shaped moving frame and the movable frame of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of one end of the U-shaped plug of the present invention;

[0031] Figure 6 This is a schematic diagram showing the connection between the L-shaped resistive plate and the movable frame of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure of the rotary cleaning unit of the present invention;

[0033] Figure 8 This is a schematic diagram showing the connection between the motor and the counterweight of the present invention.

[0034] In the diagram: 1. Moving platform; 2. First support; 3. Second support; 4. Motor; 501. Limiting groove; 502. Counterweight; 503. Guide block; 504. Guide shaft; 505. Traction rope; 506. Connecting rod; 507. Indexing frame; 508. Pull spring; 509. Locking block; 510. Fixed pulley; 511. Driven spur gear; 512. Transverse rod; 513. L-shaped side plate frame; 514. Fixed tooth connecting bar; 515. Positioning screw; 516. Irregular moving frame; 517. Adjusting screw; 518. Live position frame; 519. Compensating spring; 520. U-shaped insert; 521. L-shaped obstruction. 522. Plate; 523. Worm gear; 524. Connecting pin; 525. Rotating disc; 526. Anti-rotation hole; 527. Raised spur gear; 528. Rectangular rotating rod; 529. Pressing rack; 530. Crack detector body; 531. Anti-slip wheel; 532. Annular brush; 533. Fixed rod; 534. Limiting plate; 535. Mounting base; 536. First transmission bevel gear; 537. Second transmission bevel gear; 538. Synchronous belt; 539. Side connecting plate; 540. Compensating block; 541. Synchronous pulley; 542. Rotating sleeve; 543. Locking shaft; 544. Push connecting screw; 545. Fixed locking block. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0037] Please see Figures 1 to 8 In this embodiment of the invention, a bridge crack detection device includes a mobile platform 1, a first support 2 mounted on the top of the mobile platform 1, a second support 3 disposed on the top of the mobile platform 1 away from the first support 2, a motor 4 mounted on one side of the first support 2, an L-shaped side plate frame 513 connected to the top of the first support 2 via a fixed swing member, the first support 2 and the second support 3 connected via the fixed swing member, the bottom of the L-shaped side plate frame 513 connected to the crack detector body 530 via a distance adjuster, and a clamping side positioning component for performing distance detection on one side of the crack detector body 530.

[0038] In this embodiment: When detecting cracks on the side of a bridge, the moving platform 1 is first moved to the edge of the bridge. Then, the motor 4 is started. When the motor 4 is operating, it rotates the crack detector body 530 to one side of the bridge through the fixed swing component, thereby accurately placing the crack detector body 530. Subsequently, the staff manually adjusts the distance between the crack detector body 530 and one side of the bridge by operating the distance adjuster. The crack detector body 530 is started and the moving platform 1 is pushed to move. During this process, the distance between the crack detector body 530 and one side of the bridge is always equal when moving relative to the bridge by the distance clamping side component. This can prevent detection errors caused by the crack detector body 530 being too close or too far from the side of the bridge, thereby improving the accuracy of the detection data.

[0039] Please refer to this carefully. Figure 1 , Figure 2 , Figure 8The fixed component includes a worm gear 522 connected to the output end of the motor 4. A rotary axis 507 is rotatably connected to the top of the first support 2 via a rotating shaft. A worm wheel 523 located inside the first support 2 is provided at the bottom of the rotary axis 507, meshing with the worm gear 522. A pull spring 508 is installed inside the rotary axis 507, and a locking block 509 is connected to the top of the pull spring 508. The locking block 509 and the rotary axis 507 are slidably connected via a sliding groove. A fixed pulley 510 is installed on one side of the top of the rotary axis 507. The top of the second support 3 is provided with... A traction rope 505 is fixed to the top of the fixed shaft 504 and the locking block 509. The traction rope 505 passes around the fixed pulley 510 and is connected to the fixed shaft 504. A driven spur gear 511 is rotatably connected to one side of the locking block 509 through a bearing. A fixed toothed connecting bar 514 is fixed to one side of the indexing frame 507. The fixed toothed connecting bar 514 meshes with the driven spur gear 511. A transverse rod 512 is fixed to one end of the driven spur gear 511. An L-shaped side plate frame 513 is fixed to one end of the transverse rod 512. A weight adjustment unit connected to the moving car plate 1 is connected to one end of the worm gear 522.

[0040] In this embodiment: After the mobile platform 1 is moved to the edge of the bridge, the motor 4 can be started. When the motor 4 is operating, it rotates through the worm gear 522 and worm wheel 523, thereby causing the indexing frame 507 to swing relative to the first support 2. During this process, the distance between one end of the indexing frame 507 and the guide shaft 504 increases. The traction rope 505 can then move the locking block 509 relative to the indexing frame 507, thus causing the locking block 509 to move upward, thereby driving the pull spring 508 to stretch. During this process, the spur gear 511 will rotate along the fixed tooth connecting bar 514, thus causing the L-shaped side plate frame 513 to rotate relative to the locking block 509. This moves the L-shaped side plate frame 513, which was originally located at the top of the mobile platform 1, over the guardrail to one side of the bridge, so that the crack detector body 530 is accurately moved to one side of the bridge. This prevents the guardrail on the bridge from obstructing crack detection and also improves the smoothness of detection, thereby improving detection efficiency.

[0041] Please refer to this carefully. Figure 1 , Figure 8 The weight adjustment unit includes a connecting rod 506 fixed to one end of the worm gear 522. A push connecting screw 544 is fixed to one end of the connecting rod 506. A limiting groove 501 is opened on the top of the moving plate 1. The limiting groove 501 is located below the push connecting screw 544. A guide slider 503 is sleeved on the outside of the push connecting screw 544. The bottom of the guide slider 503 is located inside the limiting groove 501. A counterweight block 502 is fixed to one end of the guide slider 503. Fixed locking blocks 545 are fixed on both sides of the guide slider 503. The fixed locking blocks 545 are located between the first support 2 and the second support 3.

[0042] In this embodiment: when the motor 4 drives the worm gear 522 to rotate the indexing frame 507 relative to the first support 2, the connecting rod 506 will rotate with the worm gear 522. At this time, the connecting screw 544 will rotate with the connecting rod 506. In this way, the guide slider 503, which is limited by the limiting groove 501, can move away from the second support 3 along the connecting screw 544. In this way, the counterweight 502 can move away from the moving platform 1. When the L-shaped side panel frame 513 crosses the guardrail and turns to the side of the bridge, the counterweight 502 moves to the farthest distance from the moving platform 1. In this way, the counterweight 502 can be used to increase the weight on one side of the moving platform 1, so that the gravity on both sides of the moving platform 1 is balanced, thereby increasing the stability of the moving platform 1.

[0043] Please refer to this carefully. Figure 3 , Figure 5 , Figure 6 , Figure 7 The adjusting device includes an adjusting screw 517 rotatably connected to the inner bottom of the L-shaped side plate frame 513 via a bearing. One end of the adjusting screw 517 is fixed with a rotating disc 525. Multiple anti-rotation holes 526 are opened on the outer side of the rotating disc 525. The multiple anti-rotation holes 526 are evenly distributed along the center of the rotating disc 525. A movable frame 518 that extends to the bottom of the L-shaped side plate frame 513 is sleeved on the outer side of the adjusting screw 517. A U-shaped plug 520 is inserted into one side of the movable frame 518. The U-shaped plug 520 extends to the other side of the movable frame 518. A supplementary spring 519 connected to the movable frame 518 is installed on the inner side of the U-shaped plug 520. A limiting plate 534 is fixed to one end of the U-shaped plug 520. A mounting base 535 is installed at one end of the limiting plate 534. A crack detector body 530 is installed at one end of the mounting base 535.

[0044] In this embodiment: the main body 530 of the crack detector moves to one side of the bridge under the action of the fixed swing component. At this time, the staff can manually rotate the rotating connecting plate 525. When the rotating connecting plate 525 rotates, the movable frame 518 can be moved by the adjusting screw 517. In this way, the distance between the main body 530 of the crack detector and the side of the bridge can be adjusted, thereby improving the accuracy of the detection data.

[0045] Please refer to this carefully. Figure 3 , Figure 6 The L-shaped side plate frame 513 has sliding grooves on both sides that fit with the top of the movable frame 518, and the top of the movable frame 518 has threaded holes that fit with the adjusting screw 517.

[0046] In this embodiment, the structure is provided so that when the adjusting screw 517 rotates relative to the L-shaped side plate frame 513, the movable frame 518 moves along the adjusting screw 517, thereby increasing the stability of the movable frame 518's movement.

[0047] Please refer to this carefully. Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 The clamping side positioning assembly includes a fixed rod 533 fixed to one end of a limiting plate 534. The fixed rod 533 is located on both sides of the crack detector body 530. One end of the fixed rod 533 is rotatably connected to an anti-slip wheel 531 via a bearing. Rectangular rotating rods 528 are rotatably connected to both sides of an L-shaped side plate frame 513 via bearings. One end of the rectangular rotating rod 528 is fixed with a tilting spur gear 527. An L-shaped blocking plate 521 is sleeved on the outer side of the rectangular rotating rod 528. A rotating sleeve 542 is fixed to one end of the L-shaped blocking plate 521. The rotating sleeve 542 is rotatably connected to the clamping side plate 534 via a bearing. Inside the movable frame 518, one side of the L-shaped side plate frame 513 is rotatably connected to a shifting screw 515 via a rotating shaft. A special-shaped moving connecting frame 516 is sleeved on the outside of the shifting screw 515. The special-shaped moving connecting frame 516 and the L-shaped side plate frame 513 are slidably connected via a sliding groove. A locking pin 524 is fixed at the bottom of the special-shaped moving connecting frame 516. The locking pin 524 is located above the rotating connecting plate 525. A pressing rack 529 is fixed on both sides of the special-shaped moving connecting frame 516. The pressing rack 529 meshes with the lifting spur gear 527. A rotating cleaning unit is provided on the outside of the fixed rod 533.

[0048] In this embodiment: During the rotation of the adjusting screw 517, the fixed rod 533 and the crack detector body 530 will move closer to the side of the bridge as the movable frame 518 moves. When the anti-slip wheel 531 contacts the side of the bridge, the rotating connecting plate 525 continues to rotate. At this time, the U-shaped insert 520 will move relative to the movable frame 518. During this process, the supplementary spring 519 extends. As the movable frame 518 moves, the limiting plate 534 can contact the L-shaped blocking plate 521. At this time, the rotating connecting plate 525 will be limited and cannot continue to rotate. Then, the shifting screw 515 is rotated. The rotation of the shifting screw 515 causes the irregular moving connecting frame 516 to drive the locking pin 524 and the pressing rack 529 to move downward, so that the locking pin 524 is inserted into the rotating connecting plate 525, thereby limiting the rotating connecting plate 525 and preventing the adjusting screw 517 from moving relative to the L-shaped side due to the vibration of the equipment during the movement of the moving vehicle 1. The rotation of the plate frame 513 increases the stability of the movable frame 518. When the pressure rack 529 moves downward, it can drive the tilting spur gear 527 to rotate. The tilting spur gear 527 drives the L-shaped blocking plate 521 to rotate through the rectangular rotating rod 528, thereby separating the L-shaped blocking plate 521 from the U-shaped insert block 520. At this time, there will be a certain space between the limiting plate 534 and the movable frame 518. This allows the fixed rod 533 to be pushed towards the side of the bridge under the elastic restoring force of the supplementary spring 519. At the same time, the limiting plate 534 will also be squeezed by the protrusion on the side of the bridge, which will continue to stretch the supplementary spring 519. This allows the limiting plate 534 to have room to move left and right, so that the fixed rod 533 is always in contact with the side of the bridge when the equipment moves. This ensures that the main body of the crack detector 530 is always at the same distance from the side of the bridge, thus ensuring the stability of the detection and improving the detection effect.

[0049] Please refer to this carefully. Figure 6 The inner diameter of the rotating sleeve 542 is greater than the length and width of the rectangular rotating rod 528, and the top of the L-shaped blocking plate 521 is provided with a through hole that matches the rectangular rotating rod 528.

[0050] In this embodiment, by setting this structure, the rectangular rotating rod 528 can rotate, causing the L-shaped blocking plate 521 to rotate, while also reducing the frictional force generated by the L-shaped blocking plate 521 during its movement along the rectangular rotating rod 528.

[0051] Please refer to this carefully. Figure 5 , Figure 7The rotary cleaning unit includes a side clamping plate 539 fixed to one side of the fixed rod 533, a second transmission bevel gear 537 fixed to the top of the anti-slip wheel 531, the second transmission bevel gear 537 being located above the fixed rod 533, a clamping shaft 543 rotatably connected to one side of the side clamping plate 539 via a bearing, the clamping shaft 543 extending to the other side of the side clamping plate 539, a first transmission bevel gear 536 fixed to one end of the clamping shaft 543, the first transmission bevel gear 536 meshing with the second transmission bevel gear 537, a synchronous pulley 541 fixed to the end of the clamping shaft 543 away from the first transmission bevel gear 536, a synchronous belt 538 sleeved on the outside of the synchronous pulley 541, an annular brush 532 provided on the outside of the synchronous belt 538, and a supplementary block 540 located inside the synchronous belt 538 provided on one side of the side clamping plate 539.

[0052] In this embodiment: when the moving platform 1 moves, the anti-slip wheel 531 is in contact with one side of the bridge, so the anti-slip wheel 531 drives the synchronous wheel 541 to rotate through the second transmission bevel gear 537 and the first transmission bevel gear 536. When the synchronous wheel 541 rotates, it drives the synchronous belt 538 to rotate, so that the annular brush 532 rotates with the synchronous belt 538, thereby cleaning the front and rear of the crack detector body 530 in the direction of movement, preventing dust on the side of the bridge from obscuring the cracks, thereby improving the accuracy of the equipment detection.

[0053] Please refer to this carefully. Figure 7 There are two synchronous pulleys 541, and the two synchronous pulleys 541 are symmetrically arranged along the transverse central axis of the side connecting plate 539.

[0054] In this embodiment, by setting this structure, the synchronous belt 538 rotates stably when the synchronous pulley 541 rotates, thereby increasing the stability of the rotation of the annular brush 532 and improving the cleaning effect of the annular brush 532 on the bridge.

[0055] The following describes a method for detecting bridge cracks, based on the aforementioned bridge crack detection device, specifically including the following steps:

[0056] S1: When inspecting cracks on the side of the bridge, first move the mobile platform 1 to the edge of the bridge;

[0057] S2: Then start motor 4. When motor 4 is running, it rotates through worm 522 and worm wheel 523, which causes the indexing frame 507 to swing relative to the first support 2. During this process, the distance between one end of the indexing frame 507 and the guide shaft 504 increases. The traction rope 505 can move the locking block 509 relative to the indexing frame 507, which can move the locking block 509 upward, thereby driving the pull spring 508 to stretch. During this process, the spur gear 511 will rotate along the fixed tooth connecting bar 514, which can make the L-shaped side plate frame 513 rotate relative to the locking block 509. This will move the L-shaped side plate frame 513, which was originally located on the top of the moving vehicle plate 1, over the guardrail to the side of the bridge, so that the crack detector body 530 can be accurately moved to the side of the bridge. This can prevent the guardrail on the bridge from obstructing the crack detection and also improve the smoothness of the detection, thereby improving the detection efficiency.

[0058] S3: When the motor 4 drives the worm gear 522 to rotate the indexing frame 507 relative to the first support 2, the connecting rod 506 will rotate with the worm gear 522. At this time, the connecting screw 544 will rotate with the connecting rod 506. In this way, the guide slider 503, which is limited by the limiting groove 501, can move away from the second support 3 along the connecting screw 544. In this way, the counterweight 502 can move away from the moving platform 1. When the L-shaped side plate frame 513 crosses the guardrail and turns to the side of the bridge, the counterweight 502 moves to the farthest distance from the moving platform 1. In this way, the counterweight 502 can be used to increase the weight on one side of the moving platform 1, so that the gravity on both sides of the moving platform 1 is balanced, thereby increasing the stability of the moving platform 1.

[0059] S4: At this time, the staff can manually rotate the rotating plate 525. When the rotating plate 525 rotates, the movable frame 518 can be moved by adjusting the distance screw 517. In this way, the distance between the main body 530 of the crack detector and the side of the bridge can be adjusted, thereby improving the accuracy of the detection data.

[0060] S5: During the rotation of the adjusting screw 517, the fixed rod 533 and the crack detector body 530 will move closer to the side of the bridge as the movable frame 518 moves. When the anti-slip wheel 531 contacts the side of the bridge, the rotating connecting plate 525 continues to rotate. At this time, the U-shaped insert block 520 will move relative to the movable frame 518. During this process, the supplementary spring 519 extends. As the movable frame 518 moves, the limiting plate 534 can contact the L-shaped blocking plate 521. At this time, the rotating connecting plate 525 will be limited and cannot continue to rotate. Then, the shifting screw 515 is rotated. The rotation of the shifting screw 515 causes the irregular moving connecting frame 516 to drive the locking pin 524 and the pressing rack 529 to move downward, so that the locking pin 524 is inserted into the rotating connecting plate 525, thereby limiting the rotating connecting plate 525 and preventing the adjusting screw 517 from moving relative to the L-shaped side plate due to the vibration of the equipment during the movement of the moving vehicle plate 1. The rotation of frame 513 increases the stability of the movable frame 518. When the pressure rack 529 moves downward, it can drive the tilting spur gear 527 to rotate. The tilting spur gear 527 drives the L-shaped blocking plate 521 to rotate through the rectangular rotating rod 528, thereby separating the L-shaped blocking plate 521 from the U-shaped insert block 520. At this time, there will be a certain space between the limiting plate 534 and the movable frame 518. This allows the fixed rod 533 to be pushed towards the side of the bridge under the elastic restoring force of the supplementary spring 519. At the same time, the limiting plate 534 will also be squeezed by the protrusion on the side of the bridge, which will continue to stretch the supplementary spring 519. This allows the limiting plate 534 to have room to move left and right, so that the fixed rod 533 is always in contact with the side of the bridge when the equipment moves. This ensures that the main body of the crack detector 530 is always at the same distance from the side of the bridge, thus ensuring the stability of the detection and improving the detection effect.

[0061] S6: When the moving platform 1 moves, the anti-slip wheel 531 is in contact with one side of the bridge, so the anti-slip wheel 531 drives the synchronous wheel 541 to rotate through the second transmission bevel gear 537 and the first transmission bevel gear 536. When the synchronous wheel 541 rotates, it drives the synchronous belt 538 to rotate, so that the annular brush 532 rotates with the synchronous belt 538. This cleans the front and rear of the crack detector body 530 in the direction of movement, preventing dust on the side of the bridge from obscuring the cracks, thereby improving the accuracy of the equipment detection.

[0062] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A bridge crack detection device, comprising a mobile platform (1), characterized in that, The top of the mobile platform (1) is equipped with a first support (2), and the top of the mobile platform (1) is provided with a second support (3) away from the first support (2). A motor (4) is installed on one side of the first support (2). The top of the first support (2) is connected to an L-shaped side plate frame (513) through a fixed swing member. The first support (2) and the second support (3) are connected through the fixed swing member. The bottom of the L-shaped side plate frame (513) is connected to the crack detector body (530) through a distance adjuster. A clamping side positioning component for performing fixed distance detection on one side of the crack detector body (530) is provided. The fixed swing member includes a component connected to the motor. (4) The worm (522) at the output end, the top of the first support (2) is rotatably connected to the indexing frame (507) via a rotating shaft, the bottom of the indexing frame (507) is provided with a worm wheel (523) located inside the first support (2), the worm wheel (523) meshes with the worm (522), the inner side of the indexing frame (507) is installed with a pull spring (508), the top of the pull spring (508) is connected with a locking block (509), the locking block (509) and the indexing frame (507) are slidably connected through a sliding groove, a fixed pulley (510) is installed on one side of the top of the indexing frame (507), and the top of the second support (3) is provided with a fixed shaft (504). The top of the locking block (509) is fixed with a traction rope (505), which passes around the fixed pulley (510) and is connected to the fixed shaft (504). One side of the locking block (509) is rotatably connected to a driven spur gear (511) via a bearing. One side of the indexing frame (507) is fixed with a fixed toothed connecting bar (514), which meshes with the driven spur gear (511). One end of the driven spur gear (511) is fixed with a transverse rod (512), and one end of the transverse rod (512) is fixed with an L-shaped side plate frame (513). One end of the worm gear (522) is connected to an adjustment unit connected to the moving car plate (1). The heavy unit includes a connecting rod (506) fixed to one end of the worm gear (522). One end of the connecting rod (506) is fixed with a push connecting screw (544). A limiting groove (501) is opened on the top of the moving plate (1). The limiting groove (501) is located below the push connecting screw (544). A guide block (503) is sleeved on the outside of the push connecting screw (544). The bottom of the guide block (503) is located inside the limiting groove (501). A counterweight block (502) is fixed at one end of the guide block (503). Fixed locking blocks (545) are fixed on both sides of the guide block (503). The fixed locking blocks (545) are located between the first support (2) and the second support (3).

2. The bridge crack detection device according to claim 1, characterized in that, The adjusting device includes an adjusting screw (517) rotatably connected to the inner bottom of the L-shaped side plate frame (513) via a bearing. One end of the adjusting screw (517) is fixed with a connecting plate (525). The outer side of the connecting plate (525) has multiple anti-rotation holes (526), ​​which are evenly distributed along the center of the connecting plate (525). A movable bracket (518) extending to the bottom of the L-shaped side plate frame (513) is sleeved on the outer side of the adjusting screw (517). A U-shaped plug (520) is inserted into one side of the movable frame (518), and the U-shaped plug (520) extends to the other side of the movable frame (518). A supplementary spring (519) connected to the movable frame (518) is installed on the inner side of the U-shaped plug (520). A limiting plate (534) is fixed to one end of the U-shaped plug (520), and a mounting base (535) is installed at one end of the limiting plate (534). The crack detector body (530) is installed at one end of the mounting base (535).

3. The bridge crack detection device according to claim 2, characterized in that, The L-shaped side plate frame (513) has sliding grooves on both sides that fit with the top of the movable frame (518), and the top of the movable frame (518) has a threaded hole that fits with the adjusting screw (517).

4. The bridge crack detection device according to claim 3, characterized in that, The lateral positioning assembly includes a fixed rod (533) fixed to one end of a limiting plate (534). The fixed rod (533) is located on both sides of the crack detector body (530). One end of the fixed rod (533) is rotatably connected to an anti-slip wheel (531) via a bearing. Both sides of the L-shaped side plate frame (513) are rotatably connected to rectangular rotating rods (528) via bearings. One end of the rectangular rotating rod (528) is fixed to a spur gear (527). An L-shaped blocking plate (521) is sleeved on the outside of the rectangular rotating rod (528). One end of the L-shaped blocking plate (521) is fixed to a rotating sleeve (542). The rotating sleeve (542) is rotatably connected to a movable part via a bearing. Inside the positioning frame (518), one side of the L-shaped side plate frame (513) is rotatably connected to a positioning screw (515) via a rotating shaft. A special-shaped moving connecting frame (516) is sleeved on the outside of the positioning screw (515). The special-shaped moving connecting frame (516) and the L-shaped side plate frame (513) are slidably connected through a sliding groove. A locking pin (524) is fixed at the bottom of the special-shaped moving connecting frame (516). The locking pin (524) is located above the rotating connecting plate (525). A pressing rack (529) is fixed on both sides of the special-shaped moving connecting frame (516). The pressing rack (529) meshes with the lifting spur gear (527). A rotating cleaning unit is provided on the outside of the fixed rod (533).

5. A bridge crack detection device according to claim 4, characterized in that, The inner diameter of the rotating sleeve (542) is greater than the length and width of the rectangular rotating rod (528), and the top of the L-shaped blocking plate (521) is provided with a through hole that matches the rectangular rotating rod (528).

6. A bridge crack detection device according to claim 5, characterized in that, The rotary cleaning unit includes a side clamping plate (539) fixed to one side of the fixed rod (533). A second transmission bevel gear (537) is fixed to the top of the anti-slip wheel (531). The second transmission bevel gear (537) is located above the fixed rod (533). A clamping shaft (543) is rotatably connected to one side of the side clamping plate (539) via a bearing. The clamping shaft (543) extends to the other side of the side clamping plate (539). A first transmission bevel gear is fixed to one end of the clamping shaft (543). The gear (536) meshes with the first transmission bevel gear (536) and the second transmission bevel gear (537). The end of the locking shaft (543) away from the first transmission bevel gear (536) is fixed with a synchronous pulley (541). A synchronous belt (538) is sleeved on the outside of the synchronous pulley (541). An annular brush (532) is provided on the outside of the synchronous belt (538). A supplementary block (540) located inside the synchronous belt (538) is provided on one side of the side locking plate (539).

7. A bridge crack detection device according to claim 6, characterized in that, The number of the synchronous pulleys (541) is set to two, and the two synchronous pulleys (541) are symmetrically arranged along the transverse central axis of the side connecting plate (539).

8. A method for detecting cracks in bridges, characterized in that, The bridge crack detection device according to any one of claims 1-7 includes the following steps: S1: When inspecting cracks on the side of the bridge, first move the mobile platform (1) to the edge of the bridge; S2: Then start the motor (4). When the motor (4) is running, it will rotate the crack detector body (530) to one side of the bridge through the fixed part, so as to accurately place the crack detector body (530). S3: Subsequently, the staff manually adjusted the distance between the main body of the crack detector (530) and one side of the bridge by operating the distance adjuster. S4: Start the main body (530) of the crack detector and push the moving plate (1) to move. During this process, the distance between the main body (530) of the crack detector and the side of the bridge can always be equal when the crack detector moves relative to the bridge. This can prevent detection errors caused by the main body (530) of the crack detector and the side of the bridge being too close or too far away, thereby improving the accuracy of the detection data.

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