Nondestructive testing device for tunnel lining

Abstract

The utility model discloses a tunnel lining nondestructive testing device, which belongs to the technical field of tunnel engineering detection and comprises a main shell, an ultrasonic transmitting transducer used for testing the interior of a tunnel is fixedly mounted at the top of the main shell, and a receiving template used for receiving signals is rotatably connected to an inner cavity of the main shell. An inner cavity of the main shell is rotationally connected with an adjusting structure used for adjusting the overturning angle of the receiving template, by arranging the adjusting structure, an ultrasonic transmitting transducer transmits ultrasonic waves, reflected waves are received and analyzed through a receiving sensor in the receiving template, and then the structure and defect conditions in the tunnel lining are deduced. By adjusting the angle of the receiving template and changing the path and strength of the received signal, the receiving template can better capture a reflected signal right above the crack, judge the approximate depth or receive and possibly receive a signal reflected by the end part or other side surfaces of the crack from a certain inclined angle, so that more basis is provided for accurately determining the depth of the crack; and subsequent repair of workers is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of tunnel engineering detection, in particular to a tunnel lining nondestructive detection device. Background Art

[0002] In the construction of modern transportation infrastructure, tunnels are an important component, and their engineering quality and safety are of vital importance. The quality of tunnel lining, as the main load-bearing and protective part of the tunnel structure, directly affects the service life and operational safety of the tunnel. However, during the tunnel construction process, due to the influence of various factors such as complex geological conditions, improper construction technology, and differences in material properties, cracks, cavities, and voids may appear inside the tunnel lining. These defects will not only weaken the bearing capacity of the tunnel lining, but may also lead to serious accidents such as tunnel leakage and collapse, threatening the safety of life and property of passing vehicles and pedestrians. Therefore, it is of great practical significance to develop an efficient, accurate, and non-destructive tunnel lining detection device.

[0003] After massive searches, it was found that the prior art publication number is CN213149236U, which discloses a tunnel lining non-destructive testing marking device. The scheme consists of a clamping mechanism, a self-fitting mechanism, a cleaning mechanism and a spraying mechanism. The clamping mechanism consists of two L-shaped perforated steel plates, a slotted steel plate, a fastening screw and a positioning screw; the self-fitting mechanism consists of two homogeneous steel blocks, a torsion spring 1 and a perforated steel plate, wherein the two homogeneous steel blocks are connected by a shaft equipped with a torsion spring 1; the cleaning mechanism consists of a power supply, a DC motor, a power switch, a crankshaft connecting rod, a slide rail, a shock-absorbing base, a shell and a brush head, and the brush head is welded to one end of the crankshaft connecting rod using a homogeneous steel plate; the spraying mechanism consists of a pressure liquid storage tank, a rubber hose, a relay, a solenoid valve and a nozzle, the pressure liquid storage tank is filled with spray paint, the rubber hose is divided into two sections, and the nozzle is a universal bamboo nozzle.

[0004] Therefore, based on the above search and in combination with the existing, when problems occur inside the tunnel during the inspection of the interior of the tunnel by the above device, the problem areas will be marked with paint, but since the scope of the problems such as cracks inside the tunnel varies, in order to ensure accuracy, a large area of ​​painting is required. Then, after the repair process, paint may remain inside the tunnel, which destroys the original neat appearance of the inner wall of the tunnel and affects the appearance. In addition, the residual paint covers the surface of the tunnel, which may cover up newly appeared fine cracks or other defects, making it difficult for inspectors to find problems, thereby affecting the accurate assessment of the health status of the tunnel. Therefore, the utility model provides a tunnel lining non-destructive testing device to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a tunnel lining nondestructive testing device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: comprising a main shell, an ultrasonic transmitting transducer for testing the inside of a tunnel is fixedly installed on the top of the main shell, a receiving template for receiving signals is rotatably connected to the inner cavity of the main shell, an adjustment structure for adjusting the flipping angle of the receiving template is rotatably connected to the inner cavity of the main shell, and the receiving template is driven to flip through the adjustment structure, a marking block for marking cracks is placed inside the main shell, and a feeding structure for dropping the marking block is rotatably connected to the inner cavity of the main shell.

[0007] Furthermore, the adjustment structure includes a main shaft, which is rotatably connected to the inner cavity of the main shell, and the outer wall of the main shaft is rotatably connected to a pull rope for driving the receiving template to flip, and one end of the main shaft is rotatably connected to a circular plate for driving the main shaft to rotate.

[0008] Furthermore, a rotating block for positioning the receiving template is fixedly connected to the bottom of the receiving template, and the end of the rotating block away from the receiving template is rotatably connected to the inner cavity of the main shell through a bearing, and each end of the receiving template away from the rotating block is rotatably connected to a pull frame through a pin shaft, and the inner cavity of the main shell is slidably connected with a plurality of pull plates for pushing the pull frames to flip, and every two pull frames are rotatably connected to the two ends of a pull plate through a pin shaft.

[0009] Furthermore, a protrusion is fixedly connected to the bottom of the main shell, and rollers are rotatably connected to both ends of the protrusion, and a motor for driving the rollers to rotate is rotatably connected to the inner cavity of the protrusion.

[0010] Furthermore, the unloading structure includes a sliding plate, which is slidably connected to the inner cavity of the main shell, and the marking block is pushed out of the inner cavity of the main shell through the sliding plate. The inner cavity of the sliding plate is provided with a circular hole for driving the marking block to be limited, and the circular hole is used to ensure that only one marking block is moved out at a time.

[0011] Furthermore, a gear for pulling the sliding plate to slide is rotatably connected to the bottom of the sliding plate, and a connecting rope is fixedly connected to one end of the gear close to the sliding plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. By setting the adjustment structure, the ultrasonic transmitting transducer emits ultrasonic waves, and then the receiving sensor inside the receiving template receives and analyzes the reflected waves, and then infers the structure and defects inside the tunnel lining. By adjusting the angle of the receiving template, the path and intensity of the receiving signal are changed, so that the receiving template can better capture the reflected signal directly above the crack and judge the approximate depth, or receive it from a certain inclined angle, which may receive the signal reflected from the end or other sides of the crack, providing more basis for accurately determining the crack depth, so as to facilitate the subsequent repair by workers.

[0014] 2. By setting a marking block, when cracks and other problems are detected inside the tunnel, the marking block can be driven to slide toward the gear end through the sliding plate. When the marking block slides to the top of the discharge hole, the marking block moves out of the inner cavity of the main shell through the discharge hole and falls to the ground, so that the unqualified inspection parts can be found according to the corresponding position of the marking block in the future, and after the repair is completed, the marking block can be taken away for reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the whole of a nondestructive testing device for tunnel lining;

[0016] Figure 2 It is a structural cross-sectional view of the main shell in a tunnel lining non-destructive testing device;

[0017] Figure 3 It is a structural diagram of a receiving template in a non-destructive testing device for tunnel lining;

[0018] Figure 4 It is a structural diagram of a sliding plate in a non-destructive testing device for tunnel lining;

[0019] In the figure: 1, main shell; 2, ultrasonic transmitting transducer; 3, receiving template; 4, adjustment structure; 5, marking block; 6, unloading structure; 101, protrusion; 102, roller; 103, roller; 401, main shaft; 402, pull rope; 403, circular plate; 404, motor; 405, rotating block; 406, pull frame; 407, pull plate; 408, extension block; 409, slide groove; 410, spring one; 601, sliding plate; 602, circular hole; 603, square hole; 604, direction cover; 605, discharge hole; 606, gear; 607, connecting rope; 608, strip groove; 609, spring two; 610, pull block; 611, tooth block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1: Please refer to Figure 1 to Figure 4 A nondestructive testing device for tunnel lining comprises a main shell 1, an ultrasonic transmitting transducer 2 for testing the inside of the tunnel is fixedly installed on the top of the main shell 1, a receiving template 3 for receiving signals is rotatably connected to the inner cavity of the main shell 1, two receiving templates 3 are arranged in a group, and a total of multiple groups are rotatably connected to the top of the main shell 1, and a receiving sensor for receiving and analyzing reflected waves is installed in the inner cavity of the receiving template 3, so that the ultrasonic wave generated by the ultrasonic transmitting transducer 2 is transmitted to the tunnel lining, and then penetrates the lining structure through the ultrasonic wave, and when encountering the interface of different media, such as cracks, cavities or interfaces of different materials, reflection, refraction and the like will occur, and then the received ultrasonic reflection signal can be converted into an electrical signal by the receiving sensor, and then the time, amplitude, phase and the like of the reflected wave are analyzed by the receiving sensor, and the structure and defects of the inside of the tunnel lining can be inferred by analyzing the information, and the inner cavity of the main shell 1 is rotated. An adjusting structure 4 is connected to adjust the flipping angle of the receiving template 3, and the receiving template 3 is driven to flip by the adjusting structure 4, which helps to obtain more comprehensive stress wave reflection information, so as to more accurately analyze the crack depth. Then, by changing the angle of the receiving template 3, the path and strength of the received signal can be changed, so that the receiving template 3 can better capture the reflected signal directly above the crack and judge the approximate depth, or receive from a certain inclined angle, and may receive the signal reflected from the end or other sides of the crack, providing more basis for accurately determining the crack depth. A marking block 5 for marking the crack is placed inside the main shell 1, and the inner cavity of the main shell 1 is rotatably connected to a feeding structure 6 for dropping the marking block 5, so that when the receiving template 3 detects a crack inside the tunnel, a marking block 5 is dropped on the corresponding ground through the feeding structure 6, so that subsequent repair workers can quickly and accurately find the crack position, thereby improving the efficiency of the repair work.

[0022] See also Figure 2-3The adjustment structure 4 includes a main shaft 401, which is rotatably connected to the inner cavity of the main shell 1, and the outer wall of the main shaft 401 is rotatably connected to a pull rope 402 for driving the receiving template 3 to flip, and one end of the main shaft 401 is rotatably connected to a circular plate 403 for driving the main shaft 401 to rotate. Specifically, the inner cavity of the main shell 1 is fixedly installed with a motor 404 for driving the main shaft 401 to rotate, the circular plate 403 is fixedly connected to the outer wall of the output shaft of the motor 404, and the output shaft of the motor 404 passes through the circular plate 403 and is fixedly connected to the main shaft 401, and then by driving the motor 404, its output shaft drives the main shaft 401 to rotate, and then the pull rope 402 is wrapped around its outer wall and tightened, pulling the receiving template 3 to flip.

[0023] See also Figure 2-3 The bottom of the receiving template 3 is fixedly connected with a rotating block 405 for positioning the receiving template 3, and the end of the rotating block 405 away from the receiving template 3 is rotatably connected to the inner cavity of the main shell 1 through a bearing, so that when the receiving template 3 rotates, the rotating block 405 is driven to rotate around the bearing to position the receiving template 3, thereby preventing the receiving template 3 from being misplaced during the rotation process. Each end of the receiving template 3 away from the rotating block 405 is rotatably connected to a pull frame 406 through a pin shaft, and the inner cavity of the main shell 1 is slidably connected with a plurality of pull frames 406 for pushing the pull frame 406. 6 flipped pull plate 407, and every two pull frames 406 are connected to the two ends of a pull plate 407 by a pin shaft. Specifically, the bottom of the pull frame 406 is fixedly connected to the top of the pull rope 402, so that when the pull rope 402 is tightened, the pull plate 407 is pulled to slide toward the outer wall of the main shaft 401, and the receiving template 3 is flipped and adjusted by the pull frame 406, so that the receiving template 3 can achieve flexible angle adjustment, and then in the tunnel lining detection, the tunnel lining is detected from multiple angles to obtain more comprehensive stress wave reflection information;

[0024] More specifically, both ends of the pull plate 407 are fixedly connected with extension blocks 408 for limiting the pull plate 407, the inner cavity of the main shell 1 is provided with a slide groove 409 for providing the extension block 408 with sliding, and the inner cavity of the slide groove 409 is fixedly connected with a spring 410 for pushing the extension block 408 to move upward, the extension block 408 is slidably connected in the inner cavity of the slide groove 409, and the bottom of the extension block 408 is fixedly connected to the top of the spring 410, so that when the pull rope 402 is tightened to pull the pull plate 407 downward, the extension block 408 is driven to move downward in the slide groove 409, and the pull plate 407 is limited by the slide groove 409, so that the pull plate 407 slides according to the preset path, and at the same time, the spring 410 is squeezed and stored, so that after the pull rope 402 is relaxed, the spring 410 uses its own elastic force to push the extension block 408 upward, thereby driving the pull plate 407 to reset.

[0025] See also Figure 1A protrusion 101 is fixedly connected to the bottom of the main shell 1, and rollers 102 are rotatably connected to both ends of the protrusion 101. The inner cavity of the protrusion 101 is rotatably connected to a motor for driving the roller 102 to rotate. Specifically, there are two protrusions 101, and the inner cavities of the two protrusions 101 are rotatably connected to rollers 103 for driving the roller 102 to rotate. The roller 102 is fixedly connected to the outer wall of the roller 103, and the roller 103 is fixedly connected to the output shaft of the motor, and then the motor is driven so that the output shaft drives the roller 102 to move through the roller 103, thereby driving the main shell 1 to move, thereby realizing automatic movement detection of the main shell 1 inside the tunnel.

[0026] Example 2: Please refer to Figure 1-2 and Figure 4 , a nondestructive testing device for tunnel lining, which is different from Example 1 in that the material feeding structure 6 includes a sliding plate 601, which is slidably connected to the inner cavity of the main shell 1, and the marking block 5 is pushed out of the inner cavity of the main shell 1 by the sliding plate 601, and the inner cavity of the sliding plate 601 is provided with a circular hole 602 for driving the marking block 5 to limit the position, and the circular hole 602 is used to ensure that only one marking block 5 is moved out at a time, specifically, the inner cavity of the main shell 1 is provided with a square hole 603 for storing the marking block 5, and the inner cavity of the square hole 603 is clamped with a square for sealing Direction cover 604 is inserted into the interior of square hole 603 to form a sealed chamber inside square hole 603, thereby providing a good storage environment for marking block 5. The bottom of the inner cavity of main shell 1 is provided with discharge hole 605 for moving out marking block 5. When sliding plate 601 slides into the interior of square hole 603, a marking block 5 enters the inner cavity of circular hole 602 and follows the sliding of sliding plate 601. When marking block 5 moves to the top of discharge hole 605, marking block 5 moves out of the inner cavity of main shell 1 through discharge hole 605.

[0027] See also Figure 1 to Figure 4 The bottom of the sliding plate 601 is rotatably connected to a gear 606 for pulling the sliding plate 601 to slide, and one end of the gear 606 close to the sliding plate 601 is fixedly connected to a connecting rope 607, and one end of the connecting rope 607 away from the gear 606 is fixedly connected to the sliding plate 601, and the connecting rope 607 is slidably connected to the main shell 1, and the diameter of the gear 606 is equal to the distance between the center of the discharge hole 605 and the center of the marked block 5. Specifically, the outer wall of the circular plate 403 is fixedly connected to a tooth block 611 for pushing the gear 606 to rotate, and the number of the tooth block 611 is half the number of teeth of the gear 606, and is fixedly connected to the outer wall of the circular plate 403, so that when the circular plate 403 rotates toward the A end, the gear 606 cannot be driven to rotate, and when it rotates toward the B end (please refer to Figure 3), the gear 606 is pushed to rotate by the tooth block 611, and then the sliding plate 601 is pulled by the connecting rope 607 to drive the marking block 5 to slide toward the end of the gear 606, so that when the marking block 5 slides to the top of the discharge hole 605, the marking block 5 moves out of the inner cavity of the main shell 1 through the discharge hole 605;

[0028] More specifically, a strip groove 608 is provided in the inner cavity of the main shell 1, and a spring 2 609 is fixedly connected to the inner cavity of the strip groove 608 for pulling the sliding plate 601 to slide toward the end of the square hole 603. The inner cavity of the strip groove 608 is slidably connected to a pull block 610 for pulling the sliding plate 601 to slide. There are two pull blocks 610 respectively fixedly connected to the two ends of the sliding plate 601, and the pull block 610 is fixedly connected to the spring 2 609, so that when the sliding plate 601 slides toward the end of the gear 606, the spring 2 609 is stretched, and after the sliding plate 601 is relaxed, the spring 2 609 uses its own elasticity to pull the sliding plate 601 to slide to the bottom of the square hole 603 to reset.

[0029] Working principle: first, the device is placed in the middle of the tunnel, and the ultrasonic transmitting transducer 2 is driven to emit ultrasonic waves, and then the receiving sensor inside the receiving template 3 receives and analyzes the reflected waves, and then the structure and defects inside the tunnel lining are inferred. When it is detected that there is no problem inside the tunnel, the motor 404 can be driven to make its output shaft drive the main shaft 401 and the circular plate 403 to rotate toward the A end, and drive the pull rope 402 to be wrapped around its outer wall and tightened, pull the receiving template 3 to flip, adjust the angle of the receiving template 3, and drive the ultrasonic transmitting transducer 2 again to emit ultrasonic waves, and then in the tunnel lining detection, the tunnel lining is detected from multiple angles to obtain more comprehensive stress wave reflection information. When the tunnel is tested again and qualified, the motor can be driven to make its output shaft drive the roller 102 to move through the roller 103, and then drive the main shell 1 to move, move inside the tunnel, and detect other parts;

[0030] When the inspection fails, the motor 404 can be driven to make its output shaft drive the main shaft 401 and the circular plate 403 to rotate toward the B end, and drive the pull rope 402 to be wound around its outer wall to tighten, pull the receiving template 3 to flip, adjust the angle of the receiving template 3, and drive the ultrasonic transmitting transducer 2 again to emit ultrasonic waves, thereby inspecting the tunnel lining from multiple angles in the tunnel lining inspection, obtaining more comprehensive stress wave reflection information and crack depth, so as to facilitate subsequent repairs by workers. At the same time, when the circular plate 403 rotates toward the B end, please refer to Figure 3, the gear 606 can be pushed to rotate through the tooth block 611, and then the sliding plate 601 can be pulled through the connecting rope 607 to drive the marking block 5 to slide toward the end of the gear 606, so that when the marking block 5 slides to the top of the discharge hole 605, the marking block 5 moves out of the inner cavity of the main shell 1 through the discharge hole 605 and falls to the ground, so as to find the unqualified detection point according to the corresponding position of the marking block 5 later.

[0031] The above description is only a preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present utility model according to the technical scheme and utility model concept of the present utility model, which should be covered by the protection scope of the present utility model.

Claims

1. A tunnel lining non-destructive testing device, comprising a main shell (1), characterized in that: An ultrasonic transmitting transducer (2) for testing the interior of a tunnel is fixedly mounted on the top of the main shell (1); a receiving template (3) for receiving signals is rotatably connected to the inner cavity of the main shell (1); an adjusting structure (4) for adjusting the flipping angle of the receiving template (3) is rotatably connected to the inner cavity of the main shell (1); and the receiving template (3) is driven to flip via the adjusting structure (4); a marking block (5) for marking cracks is placed inside the main shell (1); and a feeding structure (6) for dropping the marking block (5) is rotatably connected to the inner cavity of the main shell (1).

2. A tunnel lining nondestructive testing device according to claim 1, characterized in that: The adjustment structure (4) comprises a main shaft (401), the main shaft (401) being rotatably connected to the inner cavity of the main shell (1), the outer wall of the main shaft (401) being rotatably connected to a pull rope (402) for driving the receiving template (3) to flip, and one end of the main shaft (401) being rotatably connected to a circular plate (403) for driving the main shaft (401) to rotate.

3. The tunnel lining nondestructive testing device according to claim 2 is characterized in that: A rotating block (405) for positioning the receiving template (3) is fixedly connected to the bottom of the receiving template (3), and one end of the rotating block (405) away from the receiving template (3) is rotatably connected to the inner cavity of the main shell (1) via a bearing, and one end of each receiving template (3) away from the rotating block (405) is rotatably connected to a pull frame (406) via a pin shaft, and the inner cavity of the main shell (1) is slidably connected to a plurality of pull plates (407) for pushing the pull frames (406) to flip, and every two pull frames (406) are rotatably connected to the two ends of a pull plate (407) via a pin shaft.

4. The tunnel lining nondestructive testing device according to claim 1, characterized in that: A protrusion (101) is fixedly connected to the bottom of the main shell (1), and rollers (102) are rotatably connected to both ends of the protrusion (101), and a motor for driving the rollers (102) to rotate is rotatably connected to the inner cavity of the protrusion (101).

5. The tunnel lining nondestructive testing device according to claim 1, characterized in that: The material removal structure (6) comprises a sliding plate (601), wherein the sliding plate (601) is slidably connected to the inner cavity of the main shell (1), and the marking block (5) is pushed out of the inner cavity of the main shell (1) through the sliding plate (601). The inner cavity of the sliding plate (601) is provided with a circular hole (602) for driving the marking block (5) to limit the position, and the circular hole (602) ensures that only one marking block (5) is moved out at a time.

6. The tunnel lining nondestructive testing device according to claim 5, characterized in that: The bottom of the sliding plate (601) is rotatably connected to a gear (606) for pulling the sliding plate (601) to slide, and one end of the gear (606) close to the sliding plate (601) is fixedly connected to a connecting rope (607).

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