Road maintenance crack detection device

Abstract

The utility model discloses a road maintenance crack detection device, which comprises a mounting rack, a movable rod and a transducer, the side wall of the mounting rack is provided with a through chute, the top of the mounting rack is symmetrically provided with grooves at the two sides of the chute, the grooves are internally and fixedly provided with guide rods along the transverse direction, each guide rod is sleeved with a sliding block in a sliding manner, and the movable rod is connected with the transducer. The movable rod is arranged in the sliding groove in a sliding and penetrating mode, the upper side and the lower side of one end of the movable rod are rotationally connected with connecting rods correspondingly, one ends of the two connecting rods are rotationally connected with the adjacent sliding blocks correspondingly, at least four clamping grooves are formed in the top of the movable rod in a concave mode at intervals, and limiting rods capable of being inserted into the clamping grooves are arranged on the top wall of the sliding groove in a sliding and penetrating mode; the two transducers are arranged on the sides, away from the connecting rod, of the two sliding blocks respectively and connected with the detector. Through the arrangement, the sliding blocks can be prevented from displacing in the detection process, meanwhile, detection personnel can conveniently adjust the two sliding blocks to preset positions, and the accuracy of a detection result is improved.

Description

Technical Field

[0001] This utility model belongs to the field of engineering testing technology, specifically relating to a road maintenance crack detection device. Background Technology

[0002] To assist maintenance departments in taking effective measures for road repair and upkeep, maintenance personnel can collect and analyze data such as the depth and width of cracks to determine the causes of road cracks. Current technology commonly uses ultrasonic methods to detect crack depth. During testing, two transducers, T and R, are first placed on the same side of the crack. The acoustic time value t1 is recorded when the distance between the inner edges of the two transducers is 100, 150, 200, and 250 mm. Then, the two transducers are placed on opposite sides of the crack, and the acoustic time value t2 is recorded when the distance between the inner edges of the two transducers is 100, 150, 200, and 250 mm. The crack depth h is then calculated.

[0003] Chinese patent CN220230448U discloses a highway concrete crack detector, which includes a main unit, a connecting frame, and two planar transducers. Both planar transducers are connected to the connecting frame, and the contact surfaces of the two planar transducers are located on the same side of the connecting frame. At least one planar transducer is slidably connected to the connecting frame. The above solution utilizes a locking component on the connecting frame to prevent the planar transducer slidably connected to the connecting frame from starting during measurement, thereby improving the stability of the above solution during the detection process.

[0004] During the use of the above solution, it is necessary to move the slider set on the connecting frame to adjust the distance between the two transducers. This process requires the use of other length measuring devices for measurement, which is relatively complicated. Moreover, this process is prone to errors due to operator error, which may cause the actual edge distance between the two transducers to deviate from the specified edge distance, resulting in poor accuracy of the test results. Utility Model Content

[0005] The present invention aims to provide a road maintenance crack detection device to solve the problems of the above-mentioned solutions being relatively complicated in operation and having poor accuracy in detection results.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A road maintenance crack detection device includes a mounting frame, a movable rod, and transducers. The mounting frame has a through groove on its side wall, and the top of the mounting frame has symmetrical grooves on both sides of the groove. Guide rods are fixedly installed in the grooves along the transverse direction. A slider is slidably sleeved on each guide rod. The movable rod slides through the groove. The upper and lower sides of one end of the movable rod are rotatably connected to transversely arranged connecting rods. One end of each of the connecting rods is rotatably connected to an adjacent slider. The top of the movable rod has at least four recessed slots at intervals. The top wall of the groove has a limiting rod that can be inserted into the slot. Two transducers are provided. The two transducers are respectively located on the side of the two sliders away from the connecting rods. The two transducers are respectively connected to a detector.

[0008] The principle and effects of this technical solution:

[0009] In the initial state, the two sliders are close to each other, and the limiting rod is inserted into the slot at the top of the other end of the movable rod. After applying coupling agent to the bottom of the transducer, the transducer is installed on the side of the slider away from the connecting rod. At this time, the edge distance between the two transducers is 100mm. Because the limiting rod prevents the movable rod from sliding, the two sliders are stationary relative to the mounting frame. After the bottom of the two transducers is aligned with the road to be tested for detection, the limiting rod is pulled upward and the movable rod is slid. When the next adjacent slot is aligned with the limiting rod, the limiting rod automatically falls and is inserted into the slot. At this time, the edge distance between the two transducers is 150mm. The bottom of the two transducers is aligned with the road to be tested again for detection, and the above steps are repeated.

[0010] By using the above-mentioned configuration, multiple slots are spaced apart on the movable rod, and the bottom of the limiting rod is inserted into the slots. This prevents the slider from shifting during the detection process, ensuring the stability of the device during detection. It also makes it convenient for the inspector to adjust the two sliders to the predetermined position without the need for a length measuring device. This solves the problems of the above-mentioned solutions, which are more complicated to operate and have poorer accuracy in the detection results.

[0011] In this invention, the top wall of the slide groove is provided with a limiting groove, and the top wall of the limiting groove has a through hole extending to the top of the mounting frame. The limiting rod slides through the through hole, and a baffle is fixedly provided on the outer side wall of the limiting rod within the limiting groove. A compression spring is sleeved between the top wall of the limiting groove and the baffle on the outer periphery of the limiting rod. Through the above arrangement, the compression spring deforms and becomes elastic during the upward pulling of the limiting rod. This allows the compression spring to push the limiting rod into the slot when the slot and the limiting rod are aligned, preventing the limiting rod from failing to fall due to friction between it and the mounting frame, thus improving the practicality of the device.

[0012] In this invention, a lifting part is fixedly provided at the top of the limiting rod. This design facilitates the pulling of the limiting rod by the inspector and prevents it from detaching.

[0013] In this utility model, the bottom wall of the mounting bracket is recessed in the middle of the insertion hole, the top of the insertion hole is provided with a mounting cavity, a pointer is slidably inserted in the insertion hole, the top of the outer side wall of the pointer is provided with an outer edge protruding in the mounting cavity, a tension spring is sleeved outside the pointer in the mounting cavity, and the two ends of the tension spring are connected to the outer edge and the bottom wall of the mounting cavity.

[0014] The principle and effects of this technical solution:

[0015] In the initial state, the lower edge of the pointer is lower than the lower edge of the transducer. When the bottom of the transducer is attached to the road surface, the bottom of the pointer is first inserted into the crack to be measured. Then, the mounting bracket and the two transducers are moved down, and the mounting bracket and the outer edge tension spring are made to have elasticity until the bottom of the two transducers are attached to the road surface.

[0016] By setting up as described above, the two transducers can be symmetrically positioned on both sides of the crack, further improving the accuracy of the measurement results of this device.

[0017] In this invention, a protective plate is fixedly installed on the side of the slider away from the connecting rod, and a mounting plate is fixedly installed on the top of the protective plate. The top of the transducer is magnetically connected to the mounting plate. When the inspector performs the inspection, the top of the transducer is magnetically connected to the mounting plate, and the transducer and the protective plate are held simultaneously while the transducer is moved up and down. Through the above arrangement, the purpose of installing the transducer on the side of the slider away from the connecting rod is achieved.

[0018] In this invention, the inner wall of the protective plate is configured as an arc surface that fits against the outer wall of the transducer. This configuration prevents the transducer from continuing to move laterally relative to the slider after it has been magnetically connected to the mounting plate at its top.

[0019] In this invention, the mounting plate has a notch on its side wall. This design facilitates the installation of the transducer. Attached Figure Description

[0020] Figure 1 This is an isometric view of the overall structure of this utility model;

[0021] Figure 2 This is a partial isometric sectional view of the present invention;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is an exploded view of some components of this utility model. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0025] The reference numerals in the accompanying drawings include: 10, mounting bracket; 11, slide groove; 12, groove; 13, guide rod; 14, limiting groove; 15, through hole; 16, insertion hole; 17, mounting cavity; 20, slider; 21, guard plate; 22, mounting plate; 221, notch; 30, movable rod; 31, connecting rod; 32, slot; 40, limiting rod; 41, baffle; 42, compression spring; 43, lifting part; 50, transducer; 51, detector; 60, pointer; 61, outer edge; 62, tension spring.

[0026] Example:

[0027] As attached Figure 1-4 As shown, this utility model discloses a road maintenance crack detection device, including a mounting frame 10, a movable rod 30, and a transducer 50. The side wall of the mounting frame 10 is provided with a through groove 11. The top of the mounting frame 10 is symmetrically provided with grooves 12 on both sides of the groove 11. Guide rods 13 are fixedly arranged horizontally in the grooves 12. A slider 20 is slidably sleeved on each guide rod 13. The movable rod 30 is slidably inserted through the groove 11. The upper and lower sides of one end of the movable rod 30 are respectively rotatably connected to the horizontally arranged connecting rods 31. One end of each of the two connecting rods 31 is rotatably connected to the adjacent slider 20. The top of the movable rod 30 is recessed with at least four slots 32 at intervals. The top wall of the groove 11 is slidably provided with a limiting rod 40 that can be inserted into the slot 32. There are two transducers 50. The two transducers 50 are respectively arranged on the side of the two sliders 20 away from the connecting rods 31. The two transducers 50 are respectively connected to the detector 51.

[0028] In this embodiment, the top wall of the slide groove 11 is provided with a limiting groove 14, and the top wall of the limiting groove 14 is provided with a through hole 15 extending to the top of the mounting bracket 10. The limiting rod 40 is slidably inserted through the through hole 15, and a baffle 41 is fixedly provided on the outer side wall of the limiting rod 40 in the limiting groove 14. A compression spring 42 is sleeved on the outer periphery of the limiting rod 40 between the top wall of the limiting groove 14 and the baffle 41.

[0029] In this embodiment, a lifting part 43 is fixedly provided on the top of the limiting rod 40. The outer side wall of the lifting part 43 protrudes out of the through hole 15 to prevent the limiting rod 40 from falling out of the limiting groove 14.

[0030] In this embodiment, the bottom wall of the mounting bracket 10 is recessed with an insertion hole 16, and the top of the insertion hole 16 is provided with a mounting cavity 17. A pointer 60 is slidably inserted into the insertion hole 16. The top of the outer side wall of the pointer 60 is provided with an outer edge 61 protruding into the mounting cavity 17. A tension spring 62 is sleeved outside the pointer 60 inside the mounting cavity 17. The two ends of the tension spring 62 are connected to the outer edge 61 and the bottom wall of the mounting cavity 17.

[0031] In this embodiment, a protective plate 21 is fixedly provided on the side of the slider 20 away from the connecting rod 31, and a mounting plate 22 is fixedly provided on the top of the protective plate 21. The top of the transducer 50 is magnetically connected to the mounting plate 22.

[0032] In this embodiment, the inner wall of the protective plate 21 is configured as an arc surface that fits against the outer wall of the transducer 50.

[0033] In this embodiment, the side wall of the mounting plate 22 is provided with a notch 221.

[0034] The specific implementation process is as follows:

[0035] In the initial state, the two sliders 20 are close to each other, and the limiting rod 40 is inserted into the slot 32 at the top of the other end of the movable rod 30. After applying coupling agent to the bottom of the transducer 50, the transducer 50 is installed on the side of the slider 20 away from the connecting rod 31. At this time, the edge distance between the two transducers 50 is 100mm. Because the limiting rod 40 prevents the movable rod 30 from sliding, the two sliders 20 are stationary relative to the mounting frame 10. After the bottom of the two transducers 50 is aligned with the road to be tested for detection, the limiting rod 40 is pulled upward and the movable rod 30 is slid. When the next adjacent slot 32 is aligned with the limiting rod 40, the limiting rod 40 automatically falls and is inserted into the slot 32. At this time, the edge distance between the two transducers 50 is 150mm. The bottom of the two transducers 50 is aligned with the road to be tested again for detection, and the above steps are repeated.

[0036] In the initial state, the lower edge of the pointer 60 is lower than the lower edge of the transducer 50. When the bottom of the transducer 50 is attached to the road surface, the bottom of the pointer 60 is first inserted into the crack to be tested. Then the mounting bracket 10 and the two transducers 50 are moved down. The mounting bracket 10 and the outer edge 61 are stretched by the tension spring 62 to make them elastic until the bottom of the two transducers 50 are attached to the road surface.

[0037] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A road maintenance crack detection apparatus characterized by comprising: The utility model relates to a kind of installation frame and detection instrument, including: Mounting frame, the side wall of the mounting frame is provided with through sliding slot, the top of mounting frame is provided with recess on both sides of sliding slot symmetrically, recess is fixedly provided with guide rod along transverse direction, each guide rod is slidably provided with sliding block on it; Movable rod, the movable rod is slidably arranged in the sliding slot, and the upper and lower sides of one end of the movable rod are respectively rotatably connected with transversely arranged connecting rod, one end of the two connecting rods is rotatably connected with adjacent sliding block respectively, and the top of the movable rod is concavely provided with at least four clamping grooves, the top wall of the sliding slot is slidably provided with limiting rod that can be inserted into the clamping groove; Transducer, the transducer is provided with two, and the two transducers are respectively arranged on the side, away from connecting rod, of the two sliding blocks, and the two transducers are respectively connected with detector.

2. The road maintenance crack detection apparatus of claim 1, wherein: The top wall of the sliding slot is provided with limiting slot, the top wall of the limiting slot is provided with through hole that is connected to the top of mounting frame, the limiting rod is slidably arranged in the through hole, and the outer side wall of the limiting rod is fixedly provided with baffle in the limiting slot, and the outer periphery of the limiting rod is sleeved with compression spring between the top wall of limiting slot and baffle.

3. The road maintenance crack detection apparatus of claim 2, wherein: The top of the limiting rod is fixedly provided with pull part.

4. The road maintenance crack detection apparatus of claim 2 or 3, wherein: The middle part of the bottom wall of the mounting frame is concavely provided with insertion hole, the top of the insertion hole is provided with mounting cavity, the insertion hole is slidably provided with pointer, the top of the outer side wall of the pointer is convexly provided with outer edge in the mounting cavity, the pointer is sleeved with tension spring in the mounting cavity, and the two ends of the tension spring are connected with outer edge and the bottom wall of mounting cavity.

5. The roadway maintenance crack detection apparatus of claim 4, wherein: The side, away from connecting rod, of the sliding block is fixedly provided with guard plate, the top of the guard plate is fixedly provided with mounting plate, and the top of the transducer is magnetically connected with the mounting plate.

6. The roadway maintenance crack detection apparatus of claim 5, wherein: The inner side wall of the guard plate is provided as arc surface that is fitted with the outer side wall of transducer.

7. The roadway maintenance crack detection apparatus of claim 6, wherein: The side wall of the mounting plate is provided with notch.

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