Concrete crack detection device

Abstract

The utility model relates to the technical field of concrete detection, and discloses a concrete crack detection device which comprises a detection vehicle and a winch, the winch hangs the detection vehicle on a panel dam through a lifting rope, the detection vehicle comprises a vehicle frame and a detection mechanism, the detection mechanism comprises a lifting plate, the lifting plate is movably arranged on the inner side of the vehicle frame, and the lifting plate is connected with the winch. A driving mechanism and two detectors are arranged on the lifting plate, the driving mechanism drives the two detectors to move reversely at the bottom of the lifting plate, and each detector comprises a planar transducer and a coupling agent coating head. The problems of low manual detection efficiency, high risk, easy interference of detection results and the like in concrete crack detection of the concrete faced rockfill dam are effectively solved, and efficient, safe and accurate detection operation is realized.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing technology, specifically to a concrete crack detection device. Background Technology

[0002] Current methods for detecting concrete cracks mainly rely on a combination of manual inspection and local instrument detection. During the inspection process, technicians first visually observe the dam surface and mark suspected crack areas. Then, they use tools such as vernier calipers and crack depth gauges to measure the length, width, and depth of the cracks, while recording the distribution location and morphological characteristics of the cracks. However, for concrete crack detection in panel dams, inspectors need to be suspended on the inclined panel dam and require the assistance of climbing equipment. This is highly dangerous, and in the high-altitude environment, they are easily affected by airflow. When inspectors press the planar transducer onto the dam surface, it is easy for it to shake, affecting the detection results. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the above-mentioned difficulties and provide a concrete crack detection device.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a concrete crack detection device, including a detection vehicle and a winch. The winch hangs the detection vehicle on the panel dam by a hoisting rope. The detection vehicle includes a frame and a detection mechanism. The detection mechanism includes a lifting plate, which is movably disposed inside the frame. The lifting plate is provided with a drive mechanism and two detectors. The drive mechanism drives the two detectors to move in opposite directions at the bottom of the lifting plate. The detectors include a planar transducer and a coupling agent coating head.

[0005] As an improvement: both sides of the lifting plate are provided with wing plates, and suction cups are provided at the corners of the wing plates. A vertical tube is provided on the top of the suction cup. The vertical tube slides into the through hole on the wing plate. A circular plate is provided on the outside of the vertical tube. A spring is connected between the wing plate and the circular plate.

[0006] As an improvement: a piston block is slidably provided in the inner sliding cavity of the riser, an adjusting column is provided on the outer side of the top of the riser, a valve block is provided on the wing plate, a U-shaped groove is provided on the inner side of the valve block, one end of the U-shaped groove is slidably engaged with the adjusting column, and the other end is connected to the top of the riser through a hose, the riser is connected to the inner cavity of the suction cup, and a rubber sheet is provided at the bottom of the suction cup.

[0007] As an improvement: upright plates are provided on both sides of the frame, and a U-shaped plate is provided between the upright plates. A motor is provided on the U-shaped plate, and a threaded post connected to the output end of the motor is provided on the inner side of the U-shaped plate. A drive plate is provided on the wing plate, and a threaded hole that mates with the threaded post is provided on the drive plate.

[0008] As an improvement: the detector also includes a mounting plate, with sliders on both sides of the mounting plate, and a sliding groove at the bottom of the lifting plate that slides with the sliders. The driving mechanism includes a second motor and a double-threaded column. The second motor drives the double-threaded column to rotate in the sliding groove. The threads on both sides of the double-threaded column are opposite in direction. The slider has a threaded hole that mates with the double-threaded column, and another sliding groove has a sliding rod that slides with the through hole of the slider.

[0009] As an improvement: a fixing plate is provided on the outside of the planar transducer and the coupling agent coating head, and a spring is connected between the fixing plate and the mounting plate.

[0010] As an improvement: the mounting plate is equipped with a pointer, and the lifting plate is equipped with a scale plate.

[0011] As an improvement: the outer side of the upright plate is provided with an outer support plate, and the outer support plate is provided with casters.

[0012] As an improvement: the inner cavity of the riser above the U-shaped groove, hose and piston block is filled with hydraulic oil.

[0013] As an improvement: the drive plate is provided with directional blocks on both sides, and the inner side of the upright plate is provided with directional grooves that slide with the directional blocks.

[0014] The advantages of this utility model compared with the prior art are as follows: This utility model, through the combination of mechanization and automation, effectively solves the problems of low efficiency, high risk, and susceptibility to interference in the detection of cracks in concrete panels of dams, achieving efficient, safe, and accurate detection operations. Specifically:

[0015] 1. With the help of winches and inspection vehicles, it is possible to fully cover areas of different heights without the need for manual hoisting, thus reducing the risk of inspection.

[0016] 2. The drive mechanism moves the detector in the opposite direction, expanding the detection range, and the detection position can be accurately controlled through the cooperation of the pointer and the scale plate;

[0017] 3. The suction cup structure ensures that the testing vehicle is stably attached to the dam surface, avoiding shaking that could affect the results;

[0018] 4. The coupling agent-coated head works in conjunction with the planar transducer, and combined with the buffering effect of spring two, it ensures good transmission of ultrasonic signals and improves the accuracy of detection data. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the testing vehicle of this utility model. Figure 1 .

[0021] Figure 3 This is a schematic diagram of the structure of the testing vehicle of this utility model. Figure 2 .

[0022] Figure 4 This is a structural schematic diagram of the vehicle frame of this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the testing mechanism of this utility model.

[0024] Figure 6 This is a cross-sectional view of the suction cup part of this utility model.

[0025] Figure 7 This is a schematic diagram of the lifting plate and drive mechanism of this utility model. Figure 1 .

[0026] Figure 8 This is a schematic diagram of the lifting plate and drive mechanism of this utility model. Figure 2 .

[0027] Figure 9 This is a schematic diagram of the detector of this utility model.

[0028] As shown in the figure: 1. Inspection vehicle; 2. Vehicle frame; 3. Inspection mechanism; 4. Lifting plate; 5. Drive mechanism; 6. Detector; 7. Suction cup; 8. Winch; 21. Vertical plate; 22. Orientation groove; 23. Outer support plate; 24. Casters; 25. U-shaped plate; 26. Motor 1; 27. Threaded column; 41. Wing plate; 42. Drive plate; 43. Orientation block; 44. Scale plate; 45. Valve block; 46. U-shaped groove; 47. Slide groove ; 48. Slide rod; 51. Motor II; 52. Gear I; 53. Double threaded column; 54. Gear II; 61. Slider; 62. Mounting plate; 63. Planar transducer; 64. Coupling agent coating head; 65. Delivery pipe; 66. Fixing plate; 67. Spring II; 68. Pointer; 71. Circular plate; 72. Vertical pipe; 73. Spring I; 74. Adjusting column; 75. Hose; 76. Piston block; 77. Rubber sheet; 81. Suspension rope. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] Combined with appendix Figure 1 Appendix Figure 2 and attached Figure 3As shown, a concrete crack detection device includes a detection vehicle 1 and a winch 8. The winch 8 suspends the detection vehicle 1 on a panel dam via a hoisting rope 81. The detection vehicle 1 includes a frame 2 and a detection mechanism 3. The detection mechanism 3 includes a lifting plate 4, which is movably disposed inside the frame 2. The lifting plate 4 is equipped with a drive mechanism 5 and two detectors 6. The drive mechanism 5 drives the two detectors 6 to move in opposite directions at the bottom of the lifting plate 4. The detector 6 includes a planar transducer 63 and a coupling agent coating head 64.

[0031] To address the issues of low efficiency, high risk, and difficulty in fully covering the detection area during manual inspection of concrete cracks in panel dams, this concrete crack detection device achieves efficient and safe inspection operations through a combination of mechanization and automation.

[0032] During inspection, the entire inspection vehicle 1 is first suspended on the panel dam using a winch 8 and a hoisting rope 81. The position of the inspection vehicle 1 on the dam surface can be adjusted by raising and lowering the winch 8. The winch 8 is movable and can drive the inspection vehicle 1 to move laterally, achieving inspection coverage of different height areas. The frame 2 of the inspection vehicle 1 serves as the main support structure, and the lifting plate 4, which is movable inside, can be adjusted in height according to inspection needs, so that the detector 6 can be close to the dam surface. After the lifting plate 4 is adjusted to the appropriate position, the drive mechanism 5 is started, driving the two detectors 6 to move in opposite directions at the bottom of the lifting plate 4. This reverse movement design ensures that the two planar transducers 63 are symmetrical on both sides of the crack, meeting the inspection requirements. The coupling agent coating head 64 on each detector 6 first applies coupling agent to the dam surface to ensure good coupling between the planar transducer 63 and the concrete surface. Then, the planar transducer 63 emits and receives ultrasonic signals. By analyzing the propagation of ultrasonic waves in the concrete, the presence of cracks and related parameters of cracks are determined, thereby completing the automated inspection of cracks on the concrete surface and inside the panel dam.

[0033] Combined with appendix Figure 5 and attached Figure 6 As shown, the lifting plate 4 has wing plates 41 on both sides, suction cups 7 at the corners of the wing plates 41, and a vertical tube 72 on the top of the suction cups 7. The vertical tube 72 is slidably engaged with the through hole on the wing plate 41. A circular plate 71 is provided on the outside of the vertical tube 72, and a spring 73 is connected between the wing plate 41 and the circular plate 71.

[0034] Combined with appendix Figure 5 and attached Figure 6As shown, a piston block 76 is slidably provided in the inner sliding cavity of the riser 72, an adjusting column 74 is provided on the outer side of the top of the riser 72, a valve block 45 is provided on the wing plate 41, and a U-shaped groove 46 is provided on the inner side of the valve block 45. One end of the U-shaped groove 46 is slidably engaged with the adjusting column 74, and the other end is connected to the top of the riser 72 through a hose 75. The riser 72 is connected to the inner cavity of the suction cup 7. The inner cavity of the riser 72 above the U-shaped groove 46, the hose 75, and the piston block 76 is filled with hydraulic oil, and a rubber sheet 77 is provided at the bottom of the suction cup 7.

[0035] To address the issue of detector 6 swaying or shifting on the dam surface during the testing process, which affects the testing process and leads to inaccurate results, suction cup 7 employs a clever structural design to achieve stable adsorption on the dam surface, ensuring the stability and accuracy of the testing operation.

[0036] The working principle of suction cup 7 is as follows: When the inspection vehicle 1 is suspended to a suitable position on the dam body by the winch 8, the lifting plate 4 adjusts the height to bring the suction cup 7 close to the surface of the dam body. As the lifting plate 4 continues to move down, the rubber sheet 77 at the bottom of the suction cup 7 first contacts the surface of the dam body. At this time, the spring 73 between the wing plate 41 and the circular plate 71 is compressed, and the resulting elastic force causes the suction cup 7 to fit tightly against the surface of the dam body to play a fixing role.

[0037] To further enhance the suction force of the suction cup 7, a closed hydraulic system is formed by the hydraulic oil filling the piston block 76 above the inner sliding cavity of the riser 72, the U-shaped groove 46 of the valve block 45, and the hose 75 connecting the two. When the riser 72 and the wing plate 41 move relative to each other, the adjusting column 74 slides in the U-shaped groove 46, changing the pressure of the hydraulic oil, which in turn pushes the piston block 76 to move up and down in the riser 72. When the piston block 76 moves upward, the air in the inner cavity of the suction cup 7 is drawn out to form a negative pressure, which causes the rubber sheet 77 to be recessed inward, thus forming a negative pressure cavity between the rubber sheet 77 and the concrete surface, so that the suction cup 7 is firmly attached to the dam surface, providing stable support for the inspection vehicle. When it is necessary to move the inspection position, the adjusting column 74 slides in the opposite direction to change the hydraulic oil pressure, causing the piston block 76 to move downward, and the inner cavity of the suction cup 7 returns to normal pressure, thereby releasing the suction state and facilitating the adjustment of the inspection vehicle's position. Through this process, it is ensured that the detector 6 always maintains a stable contact with the dam surface during inspection, ensuring the accuracy of the inspection data.

[0038] Combined with appendix Figure 4 and attached Figure 5As shown, the frame 2 has upright plates 21 on both sides, an outer support plate 23 on the outer side of the upright plate 21, a universal wheel 24 on the outer support plate 23, a U-shaped plate 25 between the upright plates 21, a motor 26 on the U-shaped plate 25, a threaded post 27 rotatably connected to the output end of the motor 26 on the inner side of the U-shaped plate 25, a drive plate 42 on the wing plate 41, a threaded hole that mates with the threaded post 27 on the drive plate 42, directional blocks 43 on both sides of the drive plate 42, and a directional groove 22 that slides with the directional blocks 43 on the inner side of the upright plate 21.

[0039] To address the instability of the inspection vehicle 1 when moving on the dam surface, and the problem that the lifting plate 4 is prone to shifting and shaking during adjustment, thus affecting the inspection accuracy, the frame 2 achieves stable support for the inspection vehicle 1 and precise adjustment of the lifting plate through a structural design combined with the lifting plate 4.

[0040] Its working principle is as follows: The upright plates 21 on both sides of the frame 2 serve as the main support structure. Universal wheels 24 are installed on the outer support plates 23 on the outer sides, providing basic support for the inspection vehicle and facilitating its flexible movement on the dam surface, ensuring the device can adapt to the needs of different inspection positions. A motor 26 is installed on the U-shaped plate 25 between the upright plates 21, serving as the power source for lifting. When the motor 26 starts, it drives the threaded column 27 connected to its output end to rotate inside the U-shaped plate 25. Since the drive plate 42 on the wing plate 41 engages with the threaded column 27 through a threaded hole... The rotational motion of the threaded column 27 is converted into the vertical linear motion of the drive plate 42, which in turn drives the lifting plate 4 and the detection mechanism above it to rise and fall synchronously. At the same time, the directional blocks 43 on both sides of the drive plate 42 slide along the directional groove 22 on the inner side of the vertical plate 21. The movement trajectory of the drive plate 42 is restricted by the cooperation between the directional blocks and the directional groove, preventing deviation or shaking during the lifting process. This ensures that the lifting plate 4 is stably and accurately adjusted to the required height, providing a reliable position guarantee for the detector to be close to the dam surface for detection, thereby improving the stability and accuracy of the overall detection operation.

[0041] Combined with appendix Figure 7 Appendix Figure 8 and attached Figure 9 As shown, the detector 6 also includes a mounting plate 62, with sliders 61 on both sides of the mounting plate 62. The bottom of the lifting plate 4 is provided with a sliding groove 47 that slides with the sliders 61. The driving mechanism 5 includes a second motor 51 and a double-threaded column 53. The output end of the second motor 51 is provided with a first gear 52. One end of the double-threaded column 53 is provided with a second gear 54 that meshes with the first gear 52. The second motor 51 drives the double-threaded column 53 to rotate in the sliding groove 47. The threads on both sides of the double-threaded column 53 are opposite in direction. The slider 61 is provided with a threaded hole that mates with the double-threaded column 53. The other sliding groove 47 is provided with a sliding rod 48 that slides with the through hole of the slider 61. The mounting plate 62 is provided with a pointer 68, and the lifting plate 4 is provided with a scale plate 44.

[0042] Combined with appendix Figure 1 and attached Figure 9 As shown, a fixing plate 66 is provided on the outside of the planar transducer 63 and the couplant coating head 64. A spring 67 is connected between the fixing plate 66 and the mounting plate 62. The planar transducer 63 is connected to the main unit through a connecting line. The couplant coating head 64 is connected to the couplant conveyor through a conveying pipe 65. The main unit is held by hand, and the couplant conveyor is placed on the winch 8.

[0043] To address the issues of limited movement range, insufficient detection accuracy due to poor adhesion to the dam surface, and difficulty in accurately controlling the detection position in traditional concrete crack detection, detector 6 achieves efficient and accurate detection operations through structural design and collaboration with drive mechanism 5.

[0044] Its working principle is as follows: During detection, motor 2 51 starts and drives gear 1 52 to rotate. Through meshing with gear 2 54, it drives the double threaded column 53 to rotate in the slide groove 47. Since the threads on both sides of the double threaded column 53 are opposite, and the slider 61 cooperates with the double threaded column 53 through the threaded hole, while the other slider 61 slides along the slide rod 48, the two detectors 6 move synchronously in opposite directions along the slide groove 47 at the bottom of the lifting plate 4, effectively expanding the detection coverage area. The pointer 68 on the mounting plate 62 moves with the detector and cooperates with the scale plate 44 on the lifting plate 4, which facilitates accurate control of the detection position.

[0045] During the detector's movement, the couplant delivery device delivers couplant to the couplant coating head 64 through the delivery pipe 65, ensuring that it is evenly coated on the dam surface. Subsequently, the planar transducer 63, under the elastic force of spring 67, tightly adheres to the dam surface, ensuring good transmission of ultrasonic signals. The planar transducer 63 transmits the detected signals to the host computer through the connecting line, enabling real-time monitoring of concrete cracks. The elastic buffering effect of spring 67 can adapt to minor unevenness on the dam surface, ensuring that the planar transducer remains in close contact with the detection surface during the detection process, thereby improving the accuracy and reliability of the detection data.

[0046] During the specific inspection, the inspection vehicle 1 moves to the crack location, and then the lifting plate 4 descends, allowing the suction cup 7 to firmly adhere to the dam surface. The drive mechanism 5 adjusts the spacing of the detectors 6 to a suitable position, and then the lifting plate 4 descends again, bringing the coupling agent coating head 64 close to the dam surface and applying the coupling agent. Then the lifting plate 4 rises, moving the planar transducer 63 above the dam surface coated with the coupling agent. Then the lifting plate 4 descends again, making the bottom of the planar transducer 63 fit tightly against the dam surface, completing one position inspection. Then the drive mechanism 5 moves the detector 6 to the next inspection position, and the above process is repeated to complete multi-point inspection. Throughout the above process, the suction cup 7 remains firmly attached to the dam surface.

[0047] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A concrete crack detection device, comprising a detection vehicle (1) and a winch (8), wherein the winch (8) suspends the detection vehicle (1) on a concrete dam via a hoisting rope (81), characterized in that: The testing vehicle (1) includes a frame (2) and a testing mechanism (3). The testing mechanism (3) includes a lifting plate (4). The lifting plate (4) is movably located inside the frame (2). The lifting plate (4) is equipped with a drive mechanism (5) and two detectors (6). The drive mechanism (5) drives the two detectors (6) to move in opposite directions at the bottom of the lifting plate (4). The detector (6) includes a planar transducer (63) and a coupling agent coating head (64).

2. The concrete crack detection device according to claim 1, characterized in that: The lifting plate (4) is provided with wing plates (41) on both sides. The corners of the wing plates (41) are provided with suction cups (7). The top of the suction cups (7) is provided with a vertical tube (72). The vertical tube (72) is slidably engaged with the through hole on the wing plate (41). A circular plate (71) is provided on the outside of the vertical tube (72). A spring (73) is connected between the wing plate (41) and the circular plate (71).

3. The concrete crack detection device according to claim 2, characterized in that: A piston block (76) is slidably provided in the inner cavity of the riser (72). An adjusting column (74) is provided on the outer side of the top of the riser (72). A valve block (45) is provided on the wing plate (41). A U-shaped groove (46) is provided on the inner side of the valve block (45). One end of the U-shaped groove (46) is slidably engaged with the adjusting column (74), and the other end is connected to the top of the riser (72) through a hose (75). The riser (72) is connected to the inner cavity of the suction cup (7). A rubber sheet (77) is provided at the bottom of the suction cup (7).

4. A concrete crack detection device according to claim 2, characterized in that: The frame (2) has upright plates (21) on both sides, and a U-shaped plate (25) between the upright plates (21). A motor (26) is provided on the U-shaped plate (25). A threaded post (27) connected to the output end of the motor (26) is provided on the inner side of the U-shaped plate (25). A drive plate (42) is provided on the wing plate (41). A threaded hole that mates with the threaded post (27) is provided on the drive plate (42).

5. A concrete crack detection device according to claim 1, characterized in that: The detector (6) also includes a mounting plate (62), with sliders (61) on both sides of the mounting plate (62). The bottom of the lifting plate (4) is provided with a sliding groove (47) that slides with the sliders (61). The driving mechanism (5) includes a second motor (51) and a double-threaded column (53). The second motor (51) drives the double-threaded column (53) to rotate in the sliding groove (47). The threads on both sides of the double-threaded column (53) are opposite. The slider (61) is provided with a threaded hole that mates with the double-threaded column (53). The other sliding groove (47) is provided with a sliding rod (48) that slides with the through hole of the slider (61).

6. A concrete crack detection device according to claim 5, characterized in that: The planar transducer (63) and the coupling agent coating head (64) are provided with a fixing plate (66) on the outside, and a spring (67) is connected between the fixing plate (66) and the mounting plate (62).

7. A concrete crack detection device according to claim 5, characterized in that: The mounting plate (62) is provided with a pointer (68), and the lifting plate (4) is provided with a scale plate (44).

8. A concrete crack detection device according to claim 4, characterized in that: The outer side of the upright plate (21) is provided with an outer support plate (23), and the outer support plate (23) is provided with casters (24).

9. A concrete crack detection device according to claim 3, characterized in that: Hydraulic oil is filled into the inner cavity of the riser (72) above the U-shaped groove (46), hose (75) and piston block (76).

10. A concrete crack detection device according to claim 4, characterized in that: The drive plate (42) has directional blocks (43) on both sides, and the inner side of the upright plate (21) has a directional groove (22) that slides with the directional blocks (43).

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