Tunnel crack depth measuring device

Abstract

The utility model relates to the technical field of tunnel crack depth measurement, in particular to a tunnel crack depth measuring device. Comprising a base, a supporting rod is arranged at the upper end of the base, a moving rod is slidably connected to the inner wall of the supporting rod, a mounting frame is arranged on one side of the upper end of the moving rod, and a crack detector body is arranged at the bottom end of the mounting frame through an auxiliary mechanism; the two ends of the upper end surface of the crack detector body are electrically connected with crack probes through data connecting lines, an adjusting mechanism is arranged at the ends, close to each other, of the base and the supporting rod and comprises a moving groove, the moving groove is formed in the surface of the base, and the inner wall of the moving groove is slidably connected with a moving block. The upper end of the moving block is fixedly connected with the bottom end of a supporting rod. The tunnel crack depth measuring device provided by the utility model has the advantage that the tunnel crack depth can be conveniently and quickly measured and positioned.

Description

Technical Field

[0001] This utility model relates to the field of tunnel crack depth measurement technology, and in particular to a tunnel crack depth measurement device. Background Technology

[0002] Tunnel crack depth measurement devices are a key technology for monitoring the health of tunnel structures and are widely used in tunnel construction, operation, and maintenance. With the continuous development of tunnel construction and the extension of tunnel service life, the appearance of tunnel cracks has become a significant source of safety risks. Cracks not only affect the load-bearing capacity and stability of tunnel structures but can also lead to a series of problems such as soil erosion and leakage. Currently, methods for detecting tunnel cracks mainly include visual inspection, laser scanning, ultrasonic testing, and infrared imaging. However, these methods primarily focus on detecting the width, shape, and surface condition of cracks, while accurate measurement of crack depth remains a significant technical challenge.

[0003] Existing technologies, such as the utility model patent with publication number CN219828409U, disclose a tunnel crack depth measuring device. This patent includes a vehicle body, a cleaning section, and a detection section. The vehicle body is equipped with four rollers, all of which are in contact with the ground. Through the design of the cleaning section, a cleaning block is welded to each first mounting arm, and the four cleaning blocks contact the outer walls of the four rollers respectively. When the rollers rotate, the cleaning blocks automatically clean the soil from the rollers. All four cleaning blocks are triangular prisms, which improves the cleaning effect on the rollers. This solves the problem that currently, when inspecting tunnels, due to the high tunnel ceiling, a telescopic rod is needed to approach the detector. Because the detection section and telescopic section are heavy, a trolley is currently used for support. However, during the inspection process, if the trolley is obstructed, it affects the continued movement of the detector, easily leading to blind spots in the detection.

[0004] During the operation of tunnel crack depth measurement equipment, the locations of cracks on the tunnel wall may vary and be randomly distributed. This makes it difficult for operators to quickly and accurately align the crack probe with the crack, requiring repeated movement and lifting of the entire device. This not only makes the operation cumbersome and laborious but also easily affects the accuracy of the measurement data due to unstable positioning. Utility Model Content

[0005] The purpose of this invention is to solve the problem that in the operation of existing tunnel crack depth measurement equipment, the cracks on the inner wall of the tunnel are located at different heights and are randomly distributed, making it difficult for operators to quickly and accurately align the crack probe with the crack. This requires repeated moving and lifting of the entire device, which is not only cumbersome and laborious to operate, but also prone to affecting the accuracy of measurement data due to unstable positioning.

[0006] To solve the above-mentioned technical problems, this utility model provides a tunnel crack depth measuring device, comprising: a base, a support rod at the upper end of the base, a movable rod slidably connected to the inner wall of the support rod, a mounting frame at one side of the upper end of the movable rod, a crack detector body at the bottom end of the mounting frame with the aid of an auxiliary mechanism, crack probes electrically connected to both ends of the upper surface of the crack detector body via data connection lines, and an adjustment mechanism at the end of the base and the support rod close to each other, the adjustment mechanism including a movable groove formed on the surface of the base, and a movable block slidably connected to the inner wall of the movable groove. The upper end of the movable block is fixedly connected to the bottom end of the support rod. A sliding rod is fixedly connected to one side of the movable block. The arc surface of the sliding rod slides through the side wall surface of the base. A pressing shaft is threaded onto the arc surface of the sliding rod. A positioning frame is fixedly connected to the upper end surface of the support rod. A positioning rod slides through the surface of the positioning frame. An inlay plate is fixedly connected to the end of the positioning rod near the movable rod. Several slots are formed on the surface of the movable rod. The inner walls of the slots engage with the surface of the inlay plate. A spring is fitted onto the arc surface of the movable rod. The two ends of the spring are fixedly connected to the inlay plate and the positioning frame, respectively.

[0007] The aforementioned components achieve the following effects: By setting an adjustment mechanism, the operator can move the support rod laterally to adjust the horizontal position of the crack detector body, pull the positioning rod to disengage the mounting plate from the slot, and then move the moving rod up and down to adjust the height. After releasing the positioning rod, the spring pushes the mounting plate into the corresponding slot to achieve fixation, thereby quickly aligning the crack probe with the crack on the tunnel wall, improving the flexibility and accuracy of the measurement, and making it suitable for crack detection at different heights and locations.

[0008] Preferably, the arc surface of the slide bar is fitted with a compression ring, and the surface of the compression ring abuts against one side of the compression shaft.

[0009] The effect achieved by the above components is as follows: the extrusion ring increases the contact area between the extrusion shaft and the slide bar. When the extrusion shaft is tightened, the extrusion ring can transmit the pressure to the slide bar more evenly, preventing the slide bar from sliding unexpectedly in the moving groove and enhancing the stability of the lateral positioning of the support rod.

[0010] Preferably, a connecting ring is fixedly connected to the surface of the movable rod, and the cross-section of the connecting ring is vertical.

[0011] The effect achieved by the above components is that the connecting ring provides the operator with a convenient point of force application. When it is necessary to adjust the height of the moving rod, the operator can hold the connecting ring to lift or press down, making the operation more effortless and convenient, and improving the efficiency of height adjustment.

[0012] Preferably, the inlay plate has a pointed conical cross-section and is made of hard alloy plate.

[0013] The effects achieved by the above components are as follows: the conical insert plate can be more tightly embedded in the slot of the moving rod, reducing gaps and ensuring accurate positioning; the hard alloy material has high wear resistance and can still maintain its shape after long-term use, extending the service life of the positioning mechanism.

[0014] Preferably, an auxiliary mechanism is provided at the bottom of the mounting frame corresponding to the position of the crack detector body. The auxiliary mechanism includes a support frame, the inner wall of which abuts against the bottom of the crack detector body. Both ends of the support frame are threaded with a rotating shaft. One end of the rotating shaft is fixedly connected with a connecting pad. The surface of the connecting pad abuts against the side wall surface of the crack detector body. Adjustment frames are fixedly connected to both sides of the bottom of the support frame. The cross-section of the adjustment frame is "V" shaped. The inner wall of the adjustment frame is engaged with the arc surface of the data connection line near the crack probe.

[0015] The aforementioned components achieve the following effects: by rotating the shaft, the connecting pad clamps the crack detector body, ensuring its stable installation within the support frame and preventing shaking during measurement; simultaneously, the "V"-shaped adjustment bracket guides and positions the data connection cable, preventing cable tangling or knotting and ensuring reliable signal transmission.

[0016] Preferably, an auxiliary ring is fixedly connected to the arc surface of the data connection line near the crack probe, and an inlaid ring is fixedly connected to the inner wall of the adjustment frame. The inlaid ring is a rubber ring with a "C" shaped cross section, and the inner wall of the inlaid ring is engaged with the arc surface of the data connection line.

[0017] The above components achieve the following effects: the auxiliary ring and the rubber inlay ring work together to securely hold the data connection cable in the adjustment frame; the rubber material increases friction to prevent the cable from slipping; and the "C"-shaped structure facilitates the insertion and removal of the cable, protecting the cable and making operation convenient.

[0018] Preferably, the four corner surfaces of the inner wall of the support frame are fixedly connected with limiting plates, the limiting plates being elastic plates, and the surface of the limiting plates abutting against the surface of the crack detector body.

[0019] The effect achieved by the above components is as follows: the elastic limiting plate applies elastic pressure to the crack detector body from all sides, and works together with the connecting pad to further eliminate the slight shaking of the detector within the support frame, ensuring its stability in any posture and improving the accuracy of the measurement data.

[0020] Compared with related technologies, the tunnel crack depth measuring device provided by this utility model has the following advantages:

[0021] This invention provides a tunnel crack depth measuring device. Through the operation of the adjustment mechanism, the crack detector body can be flexibly adjusted in multiple dimensions. Specifically, the operator can slide the moving block within the moving groove to adjust the horizontal position of the support rod and the upper crack probe; by pulling the positioning rod, the inlay plate disengages from the moving rod's slot, releasing the locking of the moving rod, thus allowing the moving rod to be freely raised and lowered to change the probe height. After releasing the positioning rod, the spring automatically resets, causing the inlay plate to engage with the new slot for a stable lock. This mechanism effectively solves the problem of existing devices being unable to quickly adapt to cracks of different heights and locations within tunnels, significantly improving the flexibility and applicability of the measurement.

[0022] By operating the auxiliary mechanism, the crack detector body is securely installed and the data connection cables are neatly organized. Specifically, by rotating the rotating shafts at both ends of the support frame, the connecting pads are clamped and fixed to the crack detector body within the support frame. Combined with the auxiliary abutment of the elastic limit plate, this ensures the stability of the detector during movement or measurement. Simultaneously, the "V"-shaped adjustment bracket at the bottom, along with the rubber inlay ring, effectively secures and guides the data connection cables, preventing cable tangling and dragging that could affect probe operation, thus ensuring signal transmission stability and ease of operation. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of a tunnel crack depth measuring device provided by this utility model;

[0024] Figure 2 for Figure 1 The diagram shows the structure of the adjustment mechanism;

[0025] Figure 3 for Figure 1 The enlarged structural diagram at point A is shown below;

[0026] Figure 4 for Figure 1 The diagram shows the structure of the auxiliary mechanism.

[0027] The following are the labeling elements in the diagram: 1. Support rod; 2. Base; 3. Moving rod; 4. Adjusting mechanism; 401. Moving groove; 402. Moving block; 403. Slide rod; 404. Extrusion shaft; 405. Extrusion ring; 406. Positioning frame; 407. Positioning rod; 408. Inlay plate; 409. Slot; 410. Spring; 411. Connecting ring; 5. Auxiliary mechanism; 51. Support frame; 52. Rotating shaft; 53. Connecting pad; 54. Adjusting frame; 55. Auxiliary ring; 56. Inlay ring; 57. Limiting plate; 6. Mounting frame; 7. Crack detector body; 8. Data connection cable; 9. Crack probe. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0030] Please see Figures 1 to 4 The present invention provides a tunnel crack depth measuring device, comprising: a base 2, a support rod 1 at the upper end of the base 2, a movable rod 3 slidably connected to the inner wall of the support rod 1, a mounting frame 6 on one side of the upper end of the movable rod 3, a crack detector body 7 at the bottom end of the mounting frame 6 with the aid of an auxiliary mechanism 5, crack probes 9 electrically connected to both ends of the upper surface of the crack detector body 7 with the aid of a data connection cable 8, an adjustment mechanism 4 at the end of the base 2 and the support rod 1 that are close to each other, and an auxiliary mechanism 5 at the bottom end of the mounting frame 6 corresponding to the position of the crack detector body 7.

[0031] In the embodiments of this utility model, please refer to Figure 2 and Figure 3 The adjusting mechanism 4 includes a moving groove 401, which is formed on the surface of the base 2. A moving block 402 is slidably connected to the inner wall of the moving groove 401. The upper end of the moving block 402 is fixedly connected to the bottom end of the support rod 1. A sliding rod 403 is fixedly connected to one side of the moving block 402. The arc surface of the sliding rod 403 slides through the side wall surface of the base 2. A pressing shaft 404 is threadedly connected to the arc surface of the sliding rod 403. A positioning frame 406 is fixedly connected to the upper surface of the support rod 1. A positioning rod 407 slides through the surface of the positioning frame 406. The end of the positioning rod 407 near the moving rod 3 is fixedly connected to... The moving rod 3 is fitted with an inlay plate 408. Several slots 409 are formed on the surface of the moving rod 3. The inner walls of the slots 409 are engaged with the surface of the inlay plate 408. A spring 410 is fitted on the arc surface of the moving rod 3. The two ends of the spring 410 are fixedly connected to the inlay plate 408 and the positioning frame 406, respectively. A compression ring 405 is fitted on the arc surface of the sliding rod 403. The surface of the compression ring 405 abuts against one side of the compression shaft 404. A connecting ring 411 is fixedly connected to the surface of the moving rod 3. The cross section of the connecting ring 411 is vertical. The cross section of the inlay plate 408 is conical. The inlay plate 408 is a hard alloy plate.

[0032] In the embodiments of this utility model, please refer to Figure 4The auxiliary mechanism 5 includes a support frame 51, the inner wall of which abuts against the bottom end of the crack detector body 7. Both ends of the support frame 51 are threaded with rotating shafts 52. One end of each rotating shaft 52 is fixedly connected to a connecting pad 53, the surface of which abuts against the side wall surface of the crack detector body 7. Adjustment frames 54 are fixedly connected to both sides of the bottom end of the support frame 51. The cross-section of the adjustment frame 54 is "V" shaped. The inner wall of the adjustment frame 54 is connected to the data connection line 8 near the crack probe 9. The data connection line 8 is fixedly connected to the arc surface of the data arc surface near the crack probe 9. The inner wall of the adjustment frame 54 is fixedly connected to the embedded ring 56, which is a rubber ring with a "C" shaped cross section. The inner wall of the embedded ring 56 is engaged with the arc surface of the data connection line 8. The four corner surfaces of the inner wall of the support frame 51 are fixedly connected to the limiting plate 57, which is an elastic plate. The surface of the limiting plate 57 abuts against the surface of the crack detector body 7.

[0033] The working principle of the tunnel crack depth measuring device provided by this utility model is as follows: When the operator needs to measure a specific crack on the tunnel wall, the device first needs to be roughly moved to the target position. Then, the horizontal position of the crack probe 9 is finely adjusted by the adjustment mechanism 4. The moving block 402 slides in the moving groove 401 opened on the surface of the base 2. Since the upper end of the moving block 402 is fixedly connected to the support rod 1, the sliding of the moving block 402 will drive the entire support rod 1 and all the components above it to move laterally. This design allows the operator to accurately align the crack probe 9 with the vertical projection line of the crack. After the support rod 1 slides to the appropriate position, the operator screws the extrusion shaft 404 threaded on the arc surface of the slide rod 403. The extrusion shaft 404 will press against the extrusion ring 405 sleeved on the slide rod 403. By increasing the friction area through the extrusion ring 405, the moving block 402 is firmly locked in the current position in the moving groove 401, preventing the support rod 1 from being accidentally displaced during subsequent operation or measurement. After the horizontal position is determined, the vertical position of the probe needs to be adjusted according to the actual height of the crack. The operator pulls the positioning rod 407 on the positioning frame 406 outwards. The positioning rod 407 moves the inlay plate 408, which is fixedly connected to it, away from the moving rod 3, while compressing the spring 410 sleeved on the moving rod 3. When the tip of the inlay plate 408 completely disengages from the slot 409 on the surface of the moving rod 3, the moving rod 3 is released from its locked state and can slide freely up and down inside the support rod 1. At this time, the operator can hold the connecting ring 411 fixedly connected to the surface of the moving rod 3 and easily lift or press down the moving rod 3, thereby changing the height of the mounting bracket 6 and the crack probe 9 from the ground. When the probe rises or falls to the position where it is completely aligned with the crack, the operator releases the positioning rod 407. As the compressed spring 410 returns to its original state, it pushes the inlay plate 408 back towards the moving rod 3, and its conical end tightly engages in the corresponding slot 409 on the surface of the moving rod 3. Because the inlay plate 408 is made of hard alloy material, it is wear-resistant and fits tightly, thus achieving reliable locking of the height position of the moving rod 3, ensuring that the height does not change during the measurement process. After the probe position is adjusted, it is necessary to ensure that the crack detector body 7 remains stable during operation. This step is accomplished by the auxiliary mechanism 5: First, the bottom end of the crack detector body 7 is placed inside the support frame 51 and abuts against the inner wall of the support frame 51. Next, the operator rotates the rotating shaft 52 threaded at both ends of the support frame 51. As the rotating shaft 52 is pushed inward, it will drive the connecting pad 53 at its end to gradually approach and finally press tightly against the side wall of the crack detector body 7. At the same time, the elastic limiting plates 57 fixedly connected to the four corners of the inner wall of the support frame 51 will also undergo elastic deformation due to the placement of the detector body, and apply auxiliary pressure from all sides.With the clamping force of the connecting pad 53 and the auxiliary fixation of the elastic limiting plate 57, the crack detector body 7 is firmly positioned in the center of the support frame 51, avoiding instrument displacement caused by device shaking or probe operation. To prevent the data connection cable 8 from becoming messy, tangled, or causing unnecessary pulling on the probe during measurement, the cable needs to be tidied up. The operator inserts the data connection cable 8 connected to both ends of the crack detector body 7, the portion of the cable closest to the crack probe 9, into the adjustment frame 54 fixed on both sides of the bottom of the support frame 51. The adjustment frame 54 has a "V" shaped cross-section, and its inner wall is fixedly connected to a rubber inlay ring 56 with a "C" shaped cross-section. The operator presses the cable into the "C" shaped opening, and the rubber inlay ring 56 uses elasticity and friction to firmly hold the cable in place, while the auxiliary ring 55 pre-set on the cable further prevents it from slipping out of the adjustment frame 54. At this point, all preparations are complete. The operator holds the crack probe 9, which has been fixed and the cable has been arranged, and places its detection end tightly against the crack in the tunnel wall. The operator then scans or detects the crack according to the operating procedures of the crack detector body 7.

[0034] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for measuring the depth of tunnel cracks, characterized in that, include: A base (2) is provided with a support rod (1) at its upper end. A movable rod (3) is slidably connected to the inner wall of the support rod (1). A mounting bracket (6) is provided on one side of the upper end of the movable rod (3). A crack detector body (7) is provided at the bottom end of the mounting bracket (6) with the aid of an auxiliary mechanism (5). Crack detector probes (9) are electrically connected to both ends of the upper surface of the crack detector body (7) with the aid of a data connection line (8). An adjustment mechanism (4) is provided at the end of the base (2) and the support rod (1) that are close to each other. The adjustment mechanism (4) includes a movable groove (401). The movable groove (401) is opened on the surface of the base (2). A movable block (402) is slidably connected to the inner wall of the movable groove (401). The upper end of the movable block (402) is fixedly connected to the bottom end of the support rod (1). A sliding rod (403) is fixedly connected to one side of the block (402). The arc surface of the sliding rod (403) slides through the side wall surface of the base (2). The arc surface of the sliding rod (403) is threadedly connected to a pressing shaft (404). A positioning frame (406) is fixedly connected to the upper surface of the support rod (1). A positioning rod (407) slides through the surface of the positioning frame (406). An inlay plate (408) is fixedly connected to one end of the positioning rod (407) near the moving rod (3). Several slots (409) are opened on the surface of the moving rod (3). The inner walls of the several slots (409) are engaged with the surface of the inlay plate (408). A spring (410) is sleeved on the arc surface of the moving rod (3). The two ends of the spring (410) are fixedly connected to the inlay plate (408) and the positioning frame (406) respectively.

2. The tunnel crack depth measuring device according to claim 1, characterized in that, The arc surface of the slide bar (403) is fitted with a compression ring (405), and the surface of the compression ring (405) abuts against one side of the compression shaft (404).

3. The tunnel crack depth measuring device according to claim 1, characterized in that, A connecting ring (411) is fixedly connected to the surface of the movable rod (3), and the cross section of the connecting ring (411) is vertical.

4. The tunnel crack depth measuring device according to claim 1, characterized in that, The cross-section of the inlay plate (408) is conical, and the inlay plate (408) is a hard alloy plate.

5. The tunnel crack depth measuring device according to claim 1, characterized in that, An auxiliary mechanism (5) is provided at the bottom of the mounting frame (6) corresponding to the position of the crack detector body (7). The auxiliary mechanism (5) includes a support frame (51). The inner wall of the support frame (51) abuts against the bottom of the crack detector body (7). Both ends of the support frame (51) are threaded with a rotating shaft (52). One end of the rotating shaft (52) is fixedly connected with a connecting pad (53). The surface of the connecting pad (53) abuts against the side wall surface of the crack detector body (7). Both sides of the bottom end of the support frame (51) are fixedly connected with an adjustment frame (54). The cross-section of the adjustment frame (54) is "V". The inner wall of the adjustment frame (54) is engaged with the arc surface of the data connection line (8) near the crack probe (9).

6. The tunnel crack depth measuring device according to claim 5, characterized in that, An auxiliary ring (55) is fixedly connected to the arc surface of the data connection line (8) near the crack probe (9). An inlaid ring (56) is fixedly connected to the inner wall of the adjustment frame (54). The inlaid ring (56) is a rubber ring with a "C" shaped cross section. The inner wall of the inlaid ring (56) is engaged with the arc surface of the data connection line (8).

7. The tunnel crack depth measuring device according to claim 5, characterized in that, Limiting plates (57) are fixedly connected to the four corner surfaces of the inner wall of the support frame (51). The limiting plates (57) are elastic plates, and the surface of the limiting plates (57) abuts against the surface of the crack detector body (7).

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