A tunnel lining structure crack acoustic wave detection device and method

Abstract

The present invention discloses a device and method for detecting cracks in a tunnel lining structure by using an acoustic wave, and belongs to the field of tunnel crack detection. A device for detecting cracks in a tunnel lining structure by using an acoustic wave, comprises a moving seat, the top of which is fixedly connected to a circular track, the bottom of which is provided with a walking part for pushing the moving seat forward, and a detection seat, the detection seat is installed on the circular track, and the top of the detection seat is fixedly connected to an acoustic wave detector, wherein a reciprocating part for driving the detection seat to slide back and forth along the circular track is provided on the moving seat; the present invention drives the detection seat and the acoustic wave detector to swing back and forth along the circular track through a rocking bar, and quickly completes the reciprocating detection of the cross section of the tunnel lining structure, thereby improving the detection efficiency and the representativeness of the detection results; at the same time, the cleaning roller is driven to rotate during the swinging, so that the cracks are cleaned before detection, so as to avoid dust and attachments in the cracks from blocking the acoustic waves, and effectively improve the detection accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel crack detection, and in particular to a device and method for detecting cracks in a tunnel lining structure using acoustic waves. Background Art

[0002] The tunnel lining structure is a masonry support structure attached to the inner wall of the tunnel. It is an important component to ensure the safety, stability and durability of the tunnel. It can not only prevent the deformation and collapse of the surrounding rock, but also protect the internal traffic or pedestrians from the influence of the external environment. In order to ensure the safety of the tunnel lining structure, it is necessary to inspect it regularly so that problems can be discovered and remedied as soon as possible. Acoustic wave testing is a non-destructive testing technology that uses the propagation characteristics of sound waves in materials to evaluate the quality and integrity of the interior of the structure. When sound waves encounter cracks or other defects, their propagation path will be affected, resulting in reflection, refraction or scattering. These changes can be captured and analyzed by receivers to determine information such as the location, size and depth of the cracks.

[0003] At present, when cracks are detected by using an acoustic wave detection device, the entire cross-section of the tunnel lining structure needs to be fully detected. Therefore, the acoustic wave detection device needs to be continuously moved to the detection surface at different positions, thereby reducing the detection efficiency; and dust in the air will adhere to the cracks that have appeared, which will block the transmission of the sound waves and reduce the detection accuracy. Therefore, a device and method for detecting cracks in a tunnel lining structure with an acoustic wave are proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the acoustic wave detection equipment needs to be continuously moved to the detection surface at different positions, which reduces the detection efficiency; and the dust in the air will adhere to the cracks that have appeared, blocking the transmission of the sound waves and reducing the detection accuracy. A device and method for acoustic wave detection of cracks in the tunnel lining structure are proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for detecting cracks in a tunnel lining structure with an acoustic wave, comprises a moving seat, the top of which is fixedly connected to a circular track, the bottom of which is provided with a walking portion for pushing the moving seat forward, and also comprises: a detection seat, the detection seat is installed on the circular track, and the top of the detection seat is fixedly connected to an acoustic wave detector, wherein the moving seat is provided with a reciprocating portion for driving the detection seat to slide back and forth along the circular track; two groups of symmetrically arranged telescopic sleeves, the two groups of telescopic sleeves are respectively fixed on both sides of the top of the detection seat, the top of the telescopic sleeves is rotatably connected to a cleaning roller, wherein the moving seat is provided with an air pressure portion for conveying negative pressure gas into the cleaning roller.

[0007] In order to improve the detection efficiency, preferably, the reciprocating part includes a positioning rod, which is fixed on the top of the detection seat, and both sides of the horizontal section of the positioning rod are rotatably connected to the driven gears, the middle part of the positioning rod is rotatably connected to a sealing sleeve, and the two ends of the sealing sleeve are respectively fixedly connected to the side walls of the driven gears on both sides, a rocking arm is fixedly connected to the outer wall of the sealing sleeve, the top of the rocking arm is fixedly connected to the bottom of the detection seat, and a driving part for driving the driven gear to reciprocate is provided on the moving seat.

[0008] Furthermore, the driving part includes two groups of mounting plates, the two groups of mounting plates are respectively fixed on both sides of the top of the moving seat, and a reciprocating screw and a driving rod are rotatably connected between the two groups of mounting plates, a moving frame slidably connected along the driving rod is threadedly sleeved on the reciprocating screw, and driving racks are fixedly connected on both sides of the top of the moving frame, the driving racks are meshingly connected to the driven gear, and the ends of the reciprocating screw and the driving rod are meshingly connected through a reduction gear set, a servo motor is fixedly connected to the mounting plate on one side, and the output shaft of the servo motor is fixedly connected to the end of the driving rod.

[0009] In order to improve the detection accuracy, preferably, the pneumatic part includes a piston box, which is fixed on the top of the movable seat, and piston plates are slidably connected in the piston cavities on both sides of the piston box, and a first spring is fixedly connected between the side wall of the piston plate and the inner wall of the piston box, the driving rod passes through the center of the piston box, and a magnetic plate is fixedly connected to the outer wall of the driving rod located in the piston box, and the magnetic plate and the piston plate repel each other magnetically, the piston cavity of the piston box is connected to the inner cavity of the positioning rod through an intake pipe, and a one-way valve is arranged in the intake pipe, the inner cavities of the positioning rod, the sealing sleeve, the rocking arm, the detection seat, the telescopic sleeve and the cleaning roller are connected to each other, a plurality of groups of negative pressure holes are evenly spaced on the surface of the cleaning roller, and a plurality of groups of fine brushes are fixed on the outer wall of the cleaning roller at equal intervals.

[0010] Furthermore, a dust filter box is fixedly connected to the positioning rod, the dust filter box is communicated with the inner cavity of the positioning rod, a dust filter net is fixedly connected to the connection between the bottom of the inner cavity of the dust filter box and the positioning rod, and the bottom of the inner cavity of the dust filter box and the dust filter net are both inclined.

[0011] The top end of the inflation tube is fixedly connected with the inflatable telescopic rod and the other end is connected with the inflatable telescopic rod by the inflatable telescopic rod.

[0012] To facilitate comprehensive inspection, preferably, the walking part includes four groups of moving wheels, which are symmetrically arranged at the bottom of the moving seat. A dual-axis motor is fixedly connected to the bottom of the moving seat, and both ends of the dual-axis motor are respectively fixedly connected to the rotating shafts of the moving wheels.

[0013] In order to reduce the overload damage of the dual-axis motor, preferably, both sides of the bottom of the moving seat are fixedly connected with auxiliary drive boxes, the rotating shaft of the moving wheel passes through the center of the auxiliary drive box, and the rotating shaft of the moving wheel located in the auxiliary drive box is fixedly connected with an auxiliary impeller, the bottom of the moving seat is fixedly connected with a release pipe, the side wall of the release pipe is fixed and connected with an impact pipe, the other end of the impact pipe is connected with the inner cavity of the auxiliary drive box, and the output end of the impact pipe faces the auxiliary impeller, and an exhaust pipe is fixed and connected on the side wall of the auxiliary drive box, and the other end of the exhaust pipe faces the ground in front of the adsorption plate.

[0014] Furthermore, a pressure relief tube is fixed on and connected to the side wall of the release tube, the other end of the pressure relief tube is connected to the inner cavity of the inflatable telescopic rod, a switching groove is provided in the movable seat, a switching plate is slidably connected in the switching groove, a third spring is fixedly connected between the bottom of the switching plate and the switching groove, a pressure relief hole is provided on the switching plate, a raised ring is fixedly connected to the side wall of the movable frame, and the top of the switching plate is obliquely arranged and aligned with the side wall of the raised ring.

[0015] A method for detecting cracks in a tunnel lining structure by acoustic waves, comprising the following steps:

[0016] Step 1: Set up the detection device in the tunnel;

[0017] Step 2: Clean the inspection surface of the tunnel lining structure;

[0018] Step 3: Perform crack detection on the lining structure along the detection path;

[0019] Step 4: Use the intermittent mobile detection device to conduct a comprehensive inspection of the tunnel.

[0020] Compared with the prior art, the present invention provides a device and method for detecting cracks in a tunnel lining structure by acoustic wave, which has the following beneficial effects:

[0021] 1. The tunnel lining structure crack acoustic wave detection device drives the detection seat and the acoustic wave detector to swing back and forth along the circular track through a rocking arm, quickly completing the reciprocating detection of the tunnel lining structure section, improving the detection efficiency and the representativeness of the detection results; at the same time, the cleaning roller is driven to rotate during the swing, so that the cracks are cleaned before the detection, avoiding the dust and attachments in the cracks from blocking the sound waves, and effectively improving the detection accuracy.

[0022] 2. The tunnel lining structure crack acoustic wave detection device, through the repulsion between the magnetic plate and the piston plate, drives the rocking arm to swing while continuously generating positive and negative air pressure in the piston box. The negative air pressure will enter the cleaning roller to assist in cleaning and collect dust, and the positive air pressure will drive the inflatable telescopic rod to generate negative pressure suction in the air pressure groove and transmit it to the adsorption plate, thereby increasing the adsorption force between the adsorption plate and the ground and improving the stability during detection.

[0023] 3. After a reciprocating detection, the tunnel lining structure crack acoustic wave detection device opens the pressure relief pipe connected to the inflatable telescopic rod through the squeezing effect of the raised ring on the side wall of the mobile frame on the switching plate, so that the high-pressure airflow rushes to the auxiliary impeller along the impact pipe, so that the auxiliary impeller obtains a rotation trend, so as to reduce the load on the dual-axis motor at the initial start-up, play an auxiliary starting effect, and improve the durability of the dual-axis motor.

[0024] 4. The tunnel lining structure crack acoustic wave detection device cleans the ground by directing the airflow filled in the auxiliary drive box through the exhaust pipe to the ground in front of the adsorption plate, thereby improving the adsorption effect of the subsequent adsorption plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The overall structure of a tunnel lining structure crack acoustic wave detection device proposed by the present invention is shown in FIG. Figure 1 ;

[0026] Figure 2 The overall structure of a tunnel lining structure crack acoustic wave detection device proposed by the present invention is shown in FIG. Figure 2 ;

[0027] Figure 3 A schematic diagram of a partially enlarged structure of a cleaning roller of a tunnel lining structure crack acoustic wave detection device proposed by the present invention;

[0028] Figure 4 A schematic diagram of the partial cross-sectional structure of a tunnel lining structure crack acoustic wave detection device proposed by the present invention Figure 1 ;

[0029] Figure 5 The invention provides a tunnel lining structure crack acoustic wave detection device Figure 4 A schematic diagram of the enlarged structure of the middle A area;

[0030] Figure 6 A schematic diagram of the partial cross-sectional structure of a tunnel lining structure crack acoustic wave detection device proposed by the present invention Figure 2 ;

[0031] Figure 7 The invention provides a tunnel lining structure crack acoustic wave detection device Figure 6 Schematic diagram of the enlarged structure of the middle B area;

[0032] Figure 8 The invention provides a tunnel lining structure crack acoustic wave detection device Figure 6 Schematic diagram of the enlarged structure of the middle C area;

[0033] Fig. 9 The invention provides a tunnel lining structure crack acoustic wave detection device Figure 6 Schematic diagram of the enlarged structure of area D in the middle.

[0034] In the figure: 1, moving seat; 2, circular track; 3, detection seat; 31, acoustic wave detector; 4, telescopic sleeve; 41, cleaning roller; 411, negative pressure hole; 412, fine brush; 5, positioning rod; 51, driven gear; 52, sealing sleeve; 53, rocking rod; 54, mounting plate; 55, reciprocating screw rod; 56, driving rod; 57, moving frame; 571, driving rack; 572, raised ring; 58, reduction gear set; 59, servo motor; 6, piston box; 61, piston plate; 611, first spring; 612, suction pipe; 62. Magnetic plate; 63. Telescopic sleeve; 631. Adsorption plate; 632. Air guide tube; 64. Air pressure groove; 641. Air pressure plate; 642. Inflatable telescopic rod; 643. Second spring; 65. Inflatable tube; 651. Negative pressure groove; 7. Dust filter box; 71. Dust filter net; 8. Moving wheel; 81. Dust-axis motor; 82. Auxiliary drive box; 83. Auxiliary impeller; 84. Release tube; 841. Impact tube; 85. Exhaust pipe; 86. Pressure relief tube; 87. Switching groove; 871. Third spring; 88. Switching plate; 881. Pressure relief hole. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] Embodiment 1:

[0038] Reference Figure 1-Figure 9 , a tunnel lining structure crack acoustic wave detection device, including a moving seat 1, the top of the moving seat 1 is fixedly connected to a circular track 2, the bottom of the moving seat 1 is provided with a walking part for pushing the moving seat 1 forward, and also includes: a detection seat 3, the detection seat 3 is installed on the circular track 2, and the top of the detection seat 3 is fixedly connected to an acoustic wave detector 31, and the acoustic wave detector 31 adopts the existing mature technology, and the specific model is LT / ZBL-F101, wherein the moving seat 1 is provided with a reciprocating part for driving the detection seat 3 to slide back and forth along the circular track 2; two groups of symmetrically arranged telescopic sleeves 4, the two groups of telescopic sleeves 4 are respectively fixed on both sides of the top of the detection seat 3, the telescopic sleeves 4 are built with springs, and the principle is the same as that of the existing spring telescopic rod, the top of the telescopic sleeve 4 is rotatably connected to a cleaning roller 41, wherein the moving seat 1 is provided with a gas pressure part for conveying negative pressure gas into the cleaning roller 41.

[0039] Reference Figure 1 , Figure 2 , Figure 4 and Figure 6The reciprocating part includes a positioning rod 5, which is fixed on the top of the detection seat 3. Both sides of the horizontal section of the positioning rod 5 are rotatably connected to the driven gear 51. The middle part of the positioning rod 5 is rotatably connected to a sealing sleeve 52, and the two ends of the sealing sleeve 52 are respectively fixedly connected to the side walls of the driven gears 51 on both sides. A rocking rod 53 is fixedly connected to the outer wall of the sealing sleeve 52. The top of the rocking rod 53 is fixedly connected to the bottom of the detection seat 3. A driving part for driving the driven gear 51 to reciprocate is provided on the moving seat 1; the driving part includes two sets of mounting plates 54, which are respectively fixed on the moving seat 1, and the two sets of mounting plates 54 are rotatably connected with a reciprocating screw rod 55 and a driving rod 56 respectively, the reciprocating screw rod 55 is threadedly sleeved with a moving frame 57 that is slidably connected along the driving rod 56, and the top two sides of the moving frame 57 are fixedly connected with a driving rack 571, the driving rack 571 is meshedly connected with the driven gear 51, and the ends of the reciprocating screw rod 55 and the driving rod 56 are meshedly connected through a reduction gear set 58, and a servo motor 59 is fixedly connected to one side of the mounting plate 54, and the output shaft of the servo motor 59 is fixedly connected to the end of the driving rod 56.

[0040] It should be noted that the side of the circular track 2 close to the servo motor 59 is the starting end. In each detection, the rocking arm 53 rotates from the starting end to the other end of the circular track 2, and then returns to the starting end. Such a round trip is a single detection path; in addition, the reduction gear set 58 is composed of gears of different sizes meshing together, so as to reduce the rotation speed of the reciprocating screw 55 through different gear ratios to ensure the smooth operation of the device.

[0041] Through the arrangement of the above structure, the servo motor 59 is then turned on to drive the driving rod 56 to rotate. At this time, under the meshing transmission of the reduction gear set 58, the reciprocating screw 55 will be synchronously driven to rotate, so that the movable frame 57 can reciprocate along the reciprocating screw 55 and the driving rod 56. At this time, in conjunction with the meshing relationship between the driving rack 571 and the driven gear 51, the rocking arm 53 can reciprocate along the positioning rod 5, and drive the detection seat 3 to swing back and forth along the circular track 2. When the rocking arm 53 starts from the starting end and returns to the starting end again, the acoustic wave detector 31 completes the reciprocating detection of a cross section of the tunnel lining structure, which effectively improves the detection efficiency and the representativeness of the results.

[0042] Reference Figure 2-Figure 5, wherein the pneumatic part includes a piston box 6, the piston box 6 is fixed on the top of the moving seat 1, piston plates 61 are slidably connected in the piston cavities on both sides of the piston box 6, a first spring 611 is fixedly connected between the side wall of the piston plate 61 and the inner wall of the piston box 6, the driving rod 56 passes through the center of the piston box 6, and a magnetic plate 62 is fixedly connected to the outer wall of the driving rod 56 located in the piston box 6, the magnetic plate 62 and the piston plate 61 repel each other, the piston cavity of the piston box 6 is connected to the inner cavity of the positioning rod 5 through the suction pipe 612, and the suction pipe 61 2 is provided with a one-way valve, the positioning rod 5, the sealing sleeve 52, the rocking arm 53, the detection seat 3, the telescopic sleeve 4 and the inner cavity of the cleaning roller 41 are connected to each other, a plurality of groups of negative pressure holes 411 are arranged at equal intervals on the surface of the cleaning roller 41, and a plurality of groups of fine brushes 412 are fixed at equal intervals on the outer wall of the cleaning roller 41; a dust filter box 7 is fixedly connected to the positioning rod 5, the dust filter box 7 is connected to the inner cavity of the positioning rod 5, a dust filter net 71 is fixedly connected to the bottom of the inner cavity of the dust filter box 7 and the connection between the positioning rod 5, and the bottom of the inner cavity of the dust filter box 7 and the dust filter net 71 are both inclined.

[0043] It should be noted that the one-way valve in the air intake pipe 612 can only allow the airflow around the cleaning roller 41 to be sucked into the piston box 6.

[0044] By setting the above structure, when the detection seat 3 swings back and forth along the annular track 2, the cleaning roller 41 will move in contact with the surface of the tunnel lining structure. Under the action of friction, the cleaning roller 41 will rotate, and the fine brush 412 on the cleaning roller 41 will be inserted into the crack of the tunnel lining structure. In this way, during the rotation of the cleaning roller 41, the dust and attachments in the crack are cleaned, and the acoustic wave detector 31 is located between the cleaning rollers 41 on both sides. In this way, the crack can be cleaned before detection to avoid the dust and attachments in the crack from blocking the acoustic wave, thereby effectively improving the detection accuracy; and when the driving rod 56 rotates, it will drive the magnetic plate 62 located in the piston box 6 to rotate synchronously. At this time, the repulsive effect of the magnetic plate 62 and the piston plate 61 is utilized. When the two are in the repulsive area, the piston plate 61 will slide to the side of the compressed first spring 611, thereby compressing the gas in the piston box 6 and opening the one-way valve in the inflation tube 65, so that the gas The body is pressed into the inflatable telescopic rod 642, and when the magnetic plate 62 and the piston plate 61 are separated from the repulsive area, under the rebound action of the first spring 611, the piston plate 61 will reset and slide, thereby generating a negative pressure suction effect in the piston box 6, and opening the one-way valve in the suction pipe 612, and the suction effect is transmitted along the suction pipe 612, the positioning rod 5, the sealing sleeve 52, the rocking arm 53, the detection seat 3, and the telescopic sleeve 4 to the inner cavity of the cleaning roller 41, and the dust is filtered and collected into the dust filter box 7 by the dust filter net 71, ensuring the cleanliness of the airflow for subsequent use of the airflow, so that the negative pressure suction effect will be continuously generated in the negative pressure hole 411 during the continuous rotation of the magnetic plate 62, and at this time, with the rotation of the cleaning roller 41, the dust and attachments in the cracks can be better cleaned, and the cleaned dust and attachments can be collected to avoid contaminating the detection area and the acoustic wave detector 31, thereby further improving the detection accuracy.

[0045] Reference Figure 2 , Figure 4 , Figure 6 and Figure 7, wherein a telescopic sleeve 63 is fixedly connected to the bottom of the movable seat 1, and a suction plate 631 is fixedly connected to the bottom of the telescopic end of the telescopic sleeve 63, and a gas pressure groove 64 is provided in the movable seat 1, and a gas pressure plate 641 is slidably connected in the gas pressure groove 64, and an inflatable telescopic rod 642 is fixedly connected in the gas pressure groove 64, and the telescopic end of the inflatable telescopic rod 642 is fixedly connected to the side wall of the gas pressure plate 641, and a second spring 643 is fixedly connected between the other side of the gas pressure plate 641 and the inner wall of the gas pressure groove 64, and the piston cavity side wall of the piston box 6 is fixedly connected. It is also connected with an inflation tube 65, and a one-way valve is arranged in the inflation tube 65. The other end of the inflation tube 65 is connected with the inner cavity of the inflatable telescopic rod 642. The inner cavity of the air pressure groove 64 is connected with the suction plate 631 through the negative pressure groove 651 on the side close to the inflatable telescopic rod 642. The upper part of the side wall of the telescopic sleeve 63 is fixed and connected with an air guide tube 632. The other end of the air guide tube 632 is connected with the inner cavity of the inflatable telescopic rod 642. When the telescopic sleeve 63 is extended downward to the maximum distance, the bottom end of the suction plate 631 is in contact with the ground.

[0046] It should be noted that the one-way valve in the inflation tube 65 can only allow the gas in the piston box 6 to enter the inflation telescopic rod 642; in addition, the telescopic sleeve 63 has a built-in spring, and its principle is the same as that of the spring telescopic rod, and the thrust required for compressing the second spring 643 is greater than the thrust required for compressing the spring in the telescopic sleeve 63.

[0047] Through the arrangement of the above structure, when the gas in the piston box 6 is continuously filled into the inflatable telescopic rod 642, this part of the gas will first enter the telescopic sleeve 63 along the air guide tube 632, so that the telescopic sleeve 63 extends downward until the adsorption plate 631 is in contact with the ground. At this time, the gas that continues to enter the inflatable telescopic rod 642 will push the telescopic end of the inflatable telescopic rod 642 to extend, thereby pushing the air pressure plate 641 to move toward the side of the compressed second spring 643, thereby generating negative pressure suction in the cavity of the air pressure groove 64 close to the side of the inflatable telescopic rod 642, and this suction will be transmitted to the adsorption plate 631 along the negative pressure groove 651, thereby increasing the adsorption force between the adsorption plate 631 and the ground, thereby improving the stability of the device during detection.

[0048] Reference Figure 2 , Figure 6 , Figure 8 and Fig. 9The walking part includes four groups of moving wheels 8, which are symmetrically arranged at the bottom of the moving seat 1. A dual-axis motor 81 is fixedly connected to the bottom of the moving seat 1, and both ends of the dual-axis motor 81 are fixedly connected to the rotating shaft of the moving wheel 8 respectively; both sides of the bottom of the moving seat 1 are fixedly connected to auxiliary drive boxes 82, the rotating shaft of the moving wheel 8 passes through the center of the auxiliary drive box 82, and an auxiliary impeller 83 is fixedly connected to the rotating shaft of the moving wheel 8 located in the auxiliary drive box 82, and a release pipe 84 is fixedly connected to the bottom of the moving seat 1, and the side wall of the release pipe 84 is fixed and connected to a punch pipe 841, the other end of the punch pipe 841 is connected to the inner cavity of the auxiliary drive box 82, and the output end of the punch pipe 841 faces the auxiliary drive box 82. The impeller 83 and the auxiliary drive box 82 are fixed on and connected to the side wall with an exhaust pipe 85, and the other end of the exhaust pipe 85 faces the ground in front of the adsorption plate 631; the release pipe 84 is fixed on and connected to the side wall with a pressure relief pipe 86, and the other end of the pressure relief pipe 86 is connected to the inner cavity of the inflatable telescopic rod 642, and a switching groove 87 is provided in the movable seat 1, and a switching plate 88 is slidably connected in the switching groove 87, and a third spring 871 is fixedly connected between the bottom of the switching plate 88 and the switching groove 87, and a pressure relief hole 881 is provided on the switching plate 88, and a raised ring 572 is fixedly connected to the side wall of the movable frame 57, and the top of the switching plate 88 is obliquely arranged and aligned with the side wall of the raised ring 572.

[0049] It should be noted that a gas sensing switch is provided in the exhaust pipe 85, and the gas sensing switch is electrically connected to the dual-axis motor 81. When high-pressure airflow appears in the exhaust pipe 85, the sensing switch controls the dual-axis motor 81 to turn on, so that it drives the moving wheel 8 to rotate a predetermined number of circles and then stop again.

[0050] Through the arrangement of the above structure, in the process of the rocking arm 53 returning to the starting end, the raised ring 572 on the side wall of the moving frame 57 will squeeze the inclined surface of the top of the switching plate 88, so that the switching plate 88 moves toward the side of the compressed third spring 871. In this process, the pressure relief hole 881 will be connected with the pressure relief pipe 86. At this time, the high-pressure airflow in the inflatable telescopic rod 642 will enter the release pipe 84 along the pressure relief pipe 86, and then be blown to the auxiliary impeller 83 in the auxiliary drive box 82 by the impact pipe 841. At the same time, when high-pressure airflow appears in the exhaust pipe 85, the gas sensing switch inside it will control the dual-axis motor 81 to turn on, so that it drives the moving wheel 8 to rotate a predetermined number of circles and then stop again. The airflow rushing toward the auxiliary impeller 83 will make the auxiliary impeller 83 obtain a tendency to rotate, thereby providing a certain auxiliary driving force for the moving wheel 8, so that in the initial stage of the dual-axis motor 81 being turned on, the load on the dual-axis motor 81 can be reduced, thereby improving the durability of the dual-axis motor 81; and the airflow entering the auxiliary drive box 82 will eventually blow along the exhaust pipe 85 to the ground in front of the adsorption plate 631, so as to clean the ground and improve the adsorption effect of the subsequent adsorption plate 631; in summary, after completing a reciprocating swing test, the moving seat 1 will move forward as a whole for a certain distance, and then continue to perform reciprocating swing detection, so as to perform comprehensive crack detection on the tunnel lining, effectively improving the detection efficiency.

[0051] In addition, when the high-pressure airflow in the inflatable telescopic rod 642 is discharged, the air pressure plate 641 will return to its original position and slide under the rebound action of the second spring 643. At this time, the negative pressure suction force transmitted to the adsorption disk 631 disappears. At the same time, the gas filled in the telescopic sleeve 63 will be compressed and flow back into the inflatable telescopic rod 642 under the action of its internal spring, so that the adsorption disk 631 is separated from the ground, thereby releasing the adsorption effect and facilitating the movement of the mobile seat 1.

[0052] Embodiment 2:

[0053] Basically the same as the first embodiment, on the basis of the first embodiment, a method for detecting cracks in a tunnel lining structure by acoustic wave is proposed, comprising the following steps:

[0054] Step 1: Set up the detection device in the tunnel;

[0055] Step 2: Clean the inspection surface of the tunnel lining structure;

[0056] Step 3: Perform crack detection on the lining structure along the detection path;

[0057] Step 4: Use the intermittent mobile detection device to conduct a comprehensive inspection of the tunnel.

[0058] Reference Figure 1-Figure 9In the present invention, when in use, the moving seat 1 and the circular track 2 are first set up in the tunnel in a state parallel to the tunnel cross section, and then the servo motor 59 is turned on to drive the driving rod 56 to rotate. At this time, under the meshing transmission of the reduction gear set 58, the reciprocating screw rod 55 will be synchronously driven to rotate, so that the moving frame 57 moves back and forth along the reciprocating screw rod 55 and the driving rod 56. At this time, the meshing relationship between the driving rack 571 and the driven gear 51 will cause the rocking arm 53 to reciprocate along the positioning rod 5, and drive the detection seat 3 to swing back and forth along the circular track 2, and the cleaning roller 41 at this time moves in contact with the surface of the tunnel lining structure. Under the action of friction, the cleaning roller 41 will rotate, and the fine brush 412 on the cleaning roller 41 will be inserted into the cracks of the tunnel lining structure, so that the dust and attachments in the cracks are cleaned during the rotation of the cleaning roller 41, and the acoustic wave detector 31 is located between the cleaning rollers 41 on both sides, so that the cracks can be cleaned before detection to avoid dust and attachments in the cracks from blocking the sound waves, effectively improving the detection accuracy, when the rocking arm 53 starts from the starting end and returns to the starting end again, the acoustic wave detector 31 completes reciprocating detection of a cross section of the tunnel lining structure, effectively improving the representativeness of the detection results.

[0059] When the driving rod 56 rotates, the magnetic plate 62 in the piston box 6 will be driven to rotate synchronously. At this time, the repulsive effect of the magnetic plate 62 and the piston plate 61 will be utilized. When the two are in the repulsive area, the piston plate 61 will slide toward the side of the compressed first spring 611, thereby compressing the gas in the piston box 6 and opening the one-way valve in the inflation tube 65, so that the gas is pressed into the inflation telescopic rod 642. When the magnetic plate 62 and the piston plate 61 are out of the repulsive area, under the rebound effect of the first spring 611, the gas in the inflation telescopic rod 642 is compressed. , the piston plate 61 will return to slide, thereby generating a negative pressure suction effect in the piston box 6, and opening the one-way valve in the suction pipe 612, and transmitting the suction effect along the suction pipe 612, the positioning rod 5, the sealing sleeve 52, the rocking arm 53, the detection seat 3, and the telescopic sleeve 4 to the inner cavity of the cleaning roller 41, and using the dust filter net 71 to filter and collect dust into the dust filter box 7, ensuring the cleanliness of the airflow, so as to make subsequent use of the airflow, so that the magnetic plate 62 is constantly rotating, first of all A negative pressure suction effect will be continuously generated in the negative pressure hole 411. At this time, with the rotation of the cleaning roller 41, the dust and attachments in the cracks are better cleaned, and the cleaned dust and attachments are collected to avoid contaminating the detection area and the acoustic wave detector 31, thereby further improving the detection accuracy; secondly, gas will be continuously filled into the inflatable telescopic rod 642, and this part of the gas will first enter the telescopic sleeve 63 along the air guide tube 632, so that the telescopic sleeve 63 extends downward until the adsorption plate 631 is attached to the ground. At this time, the gas that continues to enter the inflatable telescopic rod 642 will push the telescopic end of the inflatable telescopic rod 642 to extend, thereby pushing the air pressure plate 641 to move toward the side of the compressed second spring 643, thereby generating a negative pressure suction in the cavity near the inflatable telescopic rod 642 in the air pressure groove 64, and this suction will be transmitted to the adsorption plate 631 along the negative pressure groove 651, thereby increasing the adsorption force between the adsorption plate 631 and the ground, thereby improving the stability of the device during detection.

[0060] In addition, during the process of the rocking arm 53 returning to the starting end, the mounting plate 54 will also return to the side close to the switching plate 88, and in the final stage of the approach, the raised ring 572 on the side wall of the moving frame 57 will squeeze the inclined surface of the top of the switching plate 88, so that the switching plate 88 moves toward the side of the compressed third spring 871, and in this process, the pressure relief hole 881 will be connected with the pressure relief pipe 86. At this time, the high-pressure airflow in the inflatable telescopic rod 642 will enter the release pipe 84 along the pressure relief pipe 86, and then be blown to the auxiliary impeller 83 in the auxiliary drive box 82 by the impact pipe 841. At the same time, when high-pressure airflow appears in the exhaust pipe 85, the gas sensing switch inside it will control the dual-axis motor 81 to turn on, so that it drives the moving wheel 8 to rotate in advance. After a certain number of circles, it stops again, and the airflow rushing towards the auxiliary impeller 83 will make the auxiliary impeller 83 obtain a tendency to rotate, thereby providing a certain auxiliary driving force for the moving wheel 8, so that in the initial stage of the dual-axis motor 81 being turned on, the load on the dual-axis motor 81 can be reduced, thereby improving the durability of the dual-axis motor 81; and the airflow entering the auxiliary drive box 82 will eventually blow along the exhaust pipe 85 to the ground in front of the adsorption plate 631, so as to clean the ground and improve the adsorption effect of the subsequent adsorption plate 631; in summary, after completing a reciprocating swing test, the moving seat 1 will move forward as a whole for a distance, and then continue to perform reciprocating swing detection, so as to perform comprehensive crack detection on the tunnel lining, effectively improving the detection efficiency.

[0061] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tunnel lining structure crack acoustic wave detection device, characterized in that: The invention comprises a moving seat (1), the top of the moving seat (1) is fixedly connected to a circular track (2), the bottom of the moving seat (1) is provided with a walking part for pushing the moving seat (1) forward, and further comprises: A detection seat (3), the detection seat (3) being mounted on the annular track (2), and a sonic wave detector (31) being fixedly connected to the top of the detection seat (3). The movable seat (1) is provided with a reciprocating part for driving the detection seat (3) to slide back and forth along the annular track (2), the reciprocating part comprising a positioning rod (5), the positioning rod (5) being fixed on the top of the detection seat (3), both sides of the horizontal section of the positioning rod (5) being rotatably connected to a driven gear (51), the middle part of the positioning rod (5) being rotatably connected to a sealing sleeve (52), and both ends of the sealing sleeve (52) being respectively fixedly connected to the side walls of the driven gear (51) on both sides, the outer wall of the sealing sleeve (52) being fixedly connected to a rocking rod (53), the top end of the rocking rod (53) being fixedly connected to the bottom of the detection seat (3), and the movable seat (1) is provided with a driving part for driving the driven gear (51) to reciprocate; The driving part comprises two groups of mounting plates (54), the two groups of mounting plates (54) are respectively fixed on both sides of the top of the moving seat (1), and a reciprocating screw rod (55) and a driving rod (56) are respectively rotatably connected between the two groups of mounting plates (54), a moving frame (57) which is slidably connected along the driving rod (56) is threadedly sleeved on the reciprocating screw rod (55), and both sides of the top of the moving frame (57) are fixedly connected with a driving rack (571), the driving rack (571) is meshingly connected with the driven gear (51), and the ends of the reciprocating screw rod (55) and the driving rod (56) are meshingly connected via a reduction gear set (58), and a servo motor (59) is fixedly connected to one side of the mounting plate (54), and the output shaft of the servo motor (59) is fixedly connected to the end of the driving rod (56); Two groups of symmetrically arranged telescopic sleeves (4) are respectively fixed on both sides of the top of the detection seat (3); the top of the telescopic sleeve (4) is rotatably connected to a cleaning roller (41). The movable seat (1) is provided with a pneumatic part for conveying negative pressure gas into the cleaning roller (41), the pneumatic part comprising a piston box (6), the piston box (6) being fixed on the top of the movable seat (1), piston plates (61) being slidably connected in the piston cavities on both sides of the piston box (6), a first spring (611) being fixedly connected between the side wall of the piston plate (61) and the inner wall of the piston box (6), the driving rod (56) passing through the center of the piston box (6), and a magnetic plate (62) being fixedly connected to the outer wall of the driving rod (56) located in the piston box (6), the The magnetic plate (62) and the piston plate (61) repel each other magnetically. The piston cavity of the piston box (6) is connected to the inner cavity of the positioning rod (5) via an air suction pipe (612), and a one-way valve is arranged in the air suction pipe (612). The inner cavities of the positioning rod (5), the sealing sleeve (52), the rocking arm (53), the detection seat (3), the telescopic sleeve (4) and the cleaning roller (41) are connected to each other. A plurality of groups of negative pressure holes (411) are arranged at equal intervals on the surface of the cleaning roller (41), and a plurality of groups of fine brushes (412) are fixed at equal intervals on the outer wall of the cleaning roller (41).

2. The tunnel lining structure crack acoustic wave detection device according to claim 1, characterized in that: A dust filter box (7) is fixedly connected to the positioning rod (5); the dust filter box (7) is in communication with the inner cavity of the positioning rod (5); a dust filter net (71) is fixedly connected to the bottom of the inner cavity of the dust filter box (7) and the connection point with the positioning rod (5); and the bottom of the inner cavity of the dust filter box (7) and the dust filter net (71) are both arranged at an inclination.

3. The tunnel lining structure crack acoustic wave detection device according to claim 1, characterized in that: The bottom of the movable seat (1) is fixedly connected to a telescopic sleeve (63), the bottom of the telescopic end of the telescopic sleeve (63) is fixedly connected to a suction plate (631), a gas pressure groove (64) is provided in the movable seat (1), a gas pressure plate (641) is slidably connected in the gas pressure groove (64), an inflatable telescopic rod (642) is fixedly connected in the gas pressure groove (64), the telescopic end of the inflatable telescopic rod (642) is fixedly connected to the side wall of the gas pressure plate (641), a second spring (643) is fixedly connected between the other side of the gas pressure plate (641) and the inner wall of the gas pressure groove (64), and a gas pressure plate (641) is fixedly connected to the side wall of the piston cavity of the piston box (6). An air pipe (65) is fixed and connected thereto, and a one-way valve is arranged in the air pipe (65); the other end of the air pipe (65) is connected to the inner cavity of the inflatable telescopic rod (642); the inner cavity of the air pressure groove (64) close to the inflatable telescopic rod (642) is connected to the adsorption plate (631) via a negative pressure groove (651); an air guide pipe (632) is fixed and connected to the upper part of the side wall of the telescopic sleeve (63); the other end of the air guide pipe (632) is connected to the inner cavity of the inflatable telescopic rod (642); and when the telescopic sleeve (63) is extended downward to the maximum distance, the bottom end of the adsorption plate (631) is in contact with the ground.

4. The tunnel lining structure crack acoustic wave detection device according to claim 3, characterized in that: The walking part comprises four groups of moving wheels (8), the four groups of moving wheels (8) being symmetrically arranged at the bottom of the moving seat (1), the bottom of the moving seat (1) being fixedly connected with a double-axis motor (81), and the two ends of the double-axis motor (81) being respectively fixedly connected with the rotating shafts of the moving wheels (8).

5. The tunnel lining structure crack acoustic wave detection device according to claim 4, characterized in that: The bottom sides of the movable seat (1) are fixedly connected to auxiliary drive boxes (82), the rotating shaft of the movable wheel (8) passes through the center of the auxiliary drive box (82), and the rotating shaft of the movable wheel (8) located in the auxiliary drive box (82) is fixedly connected to an auxiliary impeller (83), the bottom of the movable seat (1) is fixedly connected to a release pipe (84), the side wall of the release pipe (84) is fixed and connected to an impact pipe (841), the other end of the impact pipe (841) is connected to the inner cavity of the auxiliary drive box (82), and the output end of the impact pipe (841) faces the auxiliary impeller (83), and the side wall of the auxiliary drive box (82) is fixed and connected to an exhaust pipe (85), and the other end of the exhaust pipe (85) faces the ground in front of the adsorption plate (631).

6. The tunnel lining structure crack acoustic wave detection device according to claim 5, characterized in that: A pressure relief pipe (86) is fixed on and connected to the side wall of the release pipe (84), and the other end of the pressure relief pipe (86) is connected to the inner cavity of the inflatable telescopic rod (642). A switching groove (87) is provided in the movable seat (1), and a switching plate (88) is slidably connected in the switching groove (87). A third spring (871) is fixedly connected between the bottom of the switching plate (88) and the switching groove (87), and a pressure relief hole (881) is provided on the switching plate (88). A raised ring (572) is fixedly connected to the side wall of the movable frame (57), and the top of the switching plate (88) is obliquely arranged and aligned with the side wall of the raised ring (572).

7. A method for detecting cracks in a tunnel lining structure by using an acoustic wave detection device for detecting cracks in a tunnel lining structure according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: Set up the detection device in the tunnel; Step 2: Clean the inspection surface of the tunnel lining structure; Step 3: Perform crack detection on the lining structure along the detection path; Step 4: Use the intermittent mobile detection device to conduct a comprehensive inspection of the tunnel.

Images