Concrete disease underwater detection method and device for canal lining

Abstract

The invention relates to the technical field of underwater detection, in particular to a concrete disease underwater detection method and device for canal lining. The concrete disease underwater detection device for the canal lining comprises a fixed frame, a first transmission belt, a second transmission belt and an air blowing assembly. A geological radar is arranged in the fixed frame, and a first opening is formed in the bottom surface; a second opening is formed in the first transmission belt; the overlapping area of the second opening and the first opening is opposite to the geological radar; a plurality of third openings and a plurality of fourth openings are formed in the second transmission belt, and each third opening and each fourth opening communicate with one through groove; the air blowing assembly outputs high-pressure air into the fixing frame, and liquid at the bottom of the fixing frame is forced to pass through the overlapping area of the first opening and the second opening, flow through the third opening or the fourth opening and then be discharged from the through groove. According to the scheme, the liquid between the geological radar and the bottom face of the channel is discharged through the air blowing assembly, and therefore the detection precision is improved.

Description

Technical Field

[0001] This invention relates to the field of underwater inspection technology, and in particular to an underwater inspection method and apparatus for concrete defects in channel lining. Background Technology

[0002] In recent years, while large-scale inter-basin water transfer projects constructed in my country have solved water shortages in some areas, numerous problems still exist in their operation. One such problem is the complex geological conditions along the canals. Special geological sections are prone to various defects, ultimately leading to voids and collapses under the canal lining. Furthermore, canal maintenance is difficult, and comprehensive inspection is challenging. Therefore, underwater inspection of underwater concrete linings and defects is crucial.

[0003] Ground-penetrating radar (GPR) technology was developed to meet the needs of rapid, accurate, and non-destructive testing. It has been widely and effectively applied in areas such as highway thickness detection, bridge thin-surface damage detection, and mineral exploration. It utilizes the propagation patterns of ultra-high frequency short-pulse electromagnetic waves in different media to determine the distribution of underground media. Interfaces between media with different dielectric constants form electrical interfaces; electromagnetic waves are reflected at these interfaces. By receiving the time series data of the reflected waves, the structure and distribution of the underwater medium can be deduced. However, water has a high dielectric constant, and most electromagnetic waves emitted from the water surface are absorbed. Traditional surface-mounted GPR is greatly affected by wind, waves, and water depth. High-frequency antennas offer high resolution but limited detection depth, while low-frequency antennas have a long penetration distance but low resolution, making quantitative analysis of radar images impossible. Summary of the Invention

[0004] The purpose of this invention is to improve the accuracy of radar detection of concrete defects in channel linings.

[0005] Specifically, this invention provides an underwater detection device for concrete defects in channel linings, comprising: a fixed frame, a first transmission belt, a second transmission belt, and an air blowing assembly; the fixed frame is a horizontally placed cylindrical structure with an elliptical vertical cross-section; each end of the fixed frame has a side plate, and the interior of the fixed frame houses multiple ground-penetrating radars that can move axially along the fixed frame; the bottom surface of the fixed frame has multiple rectangular first openings, corresponding one-to-one with the movement paths of the multiple ground-penetrating radars; the first transmission belt is rotatably disposed inside the fixed frame, with its belt surface in contact with the bottom surface of the fixed frame; the first transmission belt has V-shaped second openings that connect end-to-end along the rotation direction; when the first transmission belt rotates, the second... The overlapping area of ​​the first opening and the second opening is always opposite to the corresponding ground-penetrating radar; the second drive belt is rotatably set on the outside of the fixed frame to drive the fixed frame to move in a direction perpendicular to the axis of the fixed frame; a number of evenly arranged third openings are provided on one side of the second drive belt, and a number of evenly arranged fourth openings are provided on the other side; a number of through grooves are provided on both sides of the outer wall of the second drive belt, and each third opening and each fourth opening is connected to a through groove on its outer side; the air blowing assembly is connected to the side plate to output high-pressure gas into the interior of the fixed frame, forcing the liquid at the bottom of the fixed frame to flow through the overlapping area of ​​the first opening and the second opening, and then through the third opening or the fourth opening and discharged from the through groove.

[0006] Furthermore, the outer wall surface of the second transmission belt is provided with a wear-resistant layer.

[0007] Furthermore, the width dimensions of the first opening and the second opening are the same.

[0008] Furthermore, multiple rotatable ball screws and multiple first motors for driving the ball screws to rotate are provided between the two side plates. Each ball screw is threadedly connected to a corresponding ground-penetrating radar. The first motor is connected to a drive gear, which meshes with the driven gear at the end of the ball screw.

[0009] Furthermore, both the third and fourth openings are inclined outwards from the inside, away from the direction of rotation.

[0010] Furthermore, the third and fourth openings have the same inclination angle and are staggered along the rotation direction of the second drive belt; the center line of any third opening extends to the opposite side and, together with the extension line of the center line of the nearest fourth opening on the opposite side, forms a symmetrical V-shaped auxiliary line; the first and second drive belts rotate in opposite directions, and the first drive belt is longer than the second drive belt; as the first drive belt rotates one revolution, the second drive belt rotates in the opposite direction by the width of the opening of the V-shaped auxiliary line; during the rotation of the first drive belt one revolution, when the end of the second opening overlaps with the first opening, it also overlaps with the converging end of a V-shaped auxiliary line.

[0011] Furthermore, the number of third openings set within the opening of a V-shaped auxiliary line is one less than the number of ground-penetrating radars.

[0012] Furthermore, the end of the second opening is provided with a straight section, and the converging end of the V-shaped auxiliary line is also provided with a gap.

[0013] Furthermore, the air blowing assembly includes: an air supply device, an air supply pipe, and an air blowing nozzle; the air supply device is located outside the fixed frame and moves synchronously with the fixed frame; one end of the air supply pipe is connected to the air supply device, and the other end is connected to the fixed frame, for conveying high-pressure gas; the air blowing nozzle is connected to the air supply pipe, for spraying high-pressure gas into the fixed frame.

[0014] The present invention also provides an underwater detection method for concrete defects in channel lining, for performing any of the above-described underwater detection devices for concrete defects in channel lining, comprising the following steps: placing the underwater detection device for concrete defects in channel lining in the channel to be tested; controlling the underwater detection device for concrete defects in channel lining to move along the channel and testing the bottom surface of the channel.

[0015] The beneficial effects of this invention are: This invention relates to an underwater detection device for concrete defects in channel linings. By incorporating multiple axially movable ground-penetrating radars (GPRs) within a fixed frame, the detection is more dense and comprehensive, thus improving detection efficiency. A second drive belt is installed on the outer side of the fixed frame. The rotation of this belt drives the fixed frame, resulting in a closer fit between the drive belt and the concrete surface of the channel bottom, reducing wear and tear on the detection device and extending its lifespan. A first opening is provided on the fixed frame opposite to the GPR's movement path. A second opening is provided on the first drive belt inside the fixed frame, and third and fourth openings are provided on the second drive belt on the outer side. An air-blowing assembly is also included to deliver high-pressure gas into the fixed frame. When the detection device is submerged, the liquid at the bottom of the fixed frame, under the influence of the high-pressure gas, flows through the overlapping area of ​​the first and second openings, then through the third or fourth opening, and finally exits through a channel. This drainage of liquid between the GPR and the concrete surface of the channel bottom prevents interference with the GPR detection, improving its accuracy.

[0016] Furthermore, in the underwater concrete defect detection device for channel lining of the present invention, the third and fourth openings are set to be inclined from the inside to the outside away from the direction of rotation. This allows the liquid to flow through the third or fourth opening and be discharged through the channel under the pressure of high-pressure gas. This not only prevents the liquid from seeping into the interior, but also dries the concrete area to be tested on the bottom of the channel in advance, thereby further improving the accuracy of the detection results.

[0017] The underwater detection method for concrete defects in channel lining of the present invention, since it is applied to the aforementioned underwater detection device for concrete defects in channel lining, also possesses the beneficial technical effects of the aforementioned underwater detection device for concrete defects in channel lining. Attached Figure Description

[0018] The following sections will describe some specific embodiments of the invention in a detailed manner, by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. In the drawings: Figure 1 This is a schematic diagram of a concrete defect underwater detection device for channel lining placed on a channel according to an embodiment of the present invention. Figure 2 This is a bottom view schematic diagram of an underwater detection device for concrete defects in channel lining according to an embodiment of the present invention; the structure of the ground-penetrating radar is omitted. Figure 3 It is along Figure 2 A schematic cross-sectional view taken by the cutting line AA in the diagram; Figure 4 This is an exploded view of an underwater detection device for concrete defects in channel lining according to an embodiment of the present invention; wherein the structures of the fixing frame, the first transmission belt, and the second transmission belt are omitted. Figure 5 yes Figure 4 A schematic enlarged view of region B in the middle; Figure 6 yes Figure 4 A schematic enlarged view of region C in the middle; Figure 7 yes Figure 4 A schematic enlarged view of region D in the middle; Figure 8 This is a schematic diagram of the unfolded second transmission belt according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the unfolded first transmission belt according to an embodiment of the present invention; Figure 10 This is a schematic diagram of the unfolded fixed frame according to an embodiment of the present invention; Figure 11 This is a schematic flowchart of an underwater detection method for concrete defects in channel lining according to an embodiment of the present invention.

[0019] in: 01. Channel; 100. Fixed frame; 110. Side plate; 111. Locking block; 112. Sealing ring; 113. Support wheel; 114. Third gear; 120. Ground penetrating radar; 130. First opening; 140. Ball screw; 141. Driven gear; 150. First motor; 151. Drive gear; 160. Drive roller; 161. Tooth; 162. Second gear; 170. Support roller; 180. Second motor; 181. First gear; 200. First transmission belt; 210. Second opening; 211. Connecting bar; 300. Second transmission belt; 310. Third opening; 320. Fourth opening; 330. Through groove; 340. V-shaped auxiliary line; 350. Friction belt; 400. Air blowing assembly; 410. Air supply device; 420. Air supply pipe; 430. Air blowing nozzle. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0021] The terms "first" and "second" used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically stated, this indicates that other features are not excluded and may be further included.

[0022] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] The following reference Figures 1 to 11 This invention describes an underwater detection method and apparatus for concrete defects in channel linings.

[0024] This embodiment first provides an underwater detection device for concrete defects in channel lining. The underwater detection device for concrete defects in channel lining generally includes: a fixed frame 100, a first transmission belt 200, a second transmission belt 300, and an air blowing assembly 400.

[0025] The fixed frame 100 is a horizontally placed cylindrical structure with an elliptical vertical cross-section. A side plate 110 is provided at each end of the fixed frame 100. Multiple ground-penetrating radars 120, movable along the axial direction of the fixed frame 100, are housed inside the fixed frame 100. Multiple rectangular first openings 130 are provided on the bottom surface of the fixed frame 100, corresponding one-to-one with the movement paths of the multiple ground-penetrating radars 120. A first drive belt 200 is rotatably mounted inside the fixed frame 100, with its belt surface in contact with the bottom surface of the fixed frame 100. The first drive belt 200 has V-shaped second openings 210 that connect end-to-end along the direction of rotation. When the first drive belt 200 rotates, the overlapping area of ​​the second opening 210 and the first opening 130 always aligns with the corresponding ground-penetrating radar 120. A second drive belt 300 is rotatably mounted on the outside of the fixed frame 100, used to drive the fixed frame 100 in a direction perpendicular to its axis. The second transmission belt 300 has multiple evenly arranged third openings 310 on one side and multiple evenly arranged fourth openings 320 on the other side. Multiple through grooves 330 are provided on both sides of the outer wall of the second transmission belt 300, and each third opening 310 and each fourth opening 320 is connected to a corresponding through groove 330 on its outer side. The air blowing assembly 400 is connected to the side plate 110 and is used to output high-pressure gas (i.e., gas pressure greater than the hydrostatic pressure at the location of the detection device) into the interior of the fixed frame 100, forcing the liquid at the bottom of the fixed frame 100 to flow through the overlapping area of ​​the first opening 130 and the second opening 210, and then through the third opening 310 or the fourth opening 320 before being discharged from the through groove 330.

[0026] like Figure 3 As shown, the first drive belt 200 and the second drive belt 300 are connected end to end. Figure 3As shown, the shape of the side plate 110 matches the shape of the vertical cross-section of the fixed frame 100. A locking block 111 is provided around the circumference of the side plate 110, protruding radially and then bending axially. The locking block 111 abuts against the outer peripheral surface of the fixed frame 100, thereby securing the side plate 110 to both ends of the fixed frame 100. A sealing ring 112 can also be fitted around the outer periphery of the side plate 110, abutting against the fixed frame 100 to prevent external liquids from seeping into the fixed frame 100. Two support wheels 113 are provided on the outer side of each side plate 110. A friction belt 350 is fixedly connected to each side of the second transmission belt 300, and the friction belt 350 is fitted around the outer periphery of the two support wheels 113 on the same side. The inner surface of the friction belt 350 is flush with the inner surface of the second transmission belt 300, and the outer surface of the friction belt 350 is lower than the bottom of the through groove 330 to ensure smooth drainage of liquid from the through groove 330.

[0027] The ground-penetrating radar 120 performs detection vertically downwards. The first opening 130 is located directly below the ground-penetrating radar 120, and the centerline of each first opening 130 coincides with the movement path of the corresponding ground-penetrating radar 120. The second opening 210 extends obliquely from one side of the first transmission belt 200 along the rotation direction to the other side, and then continues to obliquely in the opposite direction along the rotation direction until it connects with the starting end. A through-groove 330 is provided on the outer side of each third opening 310 and fourth opening 320 (i.e., the side closest to the edge of the second transmission belt 300). The through-groove 330 is obliquely arranged along the centerline of the corresponding third opening 310 or fourth opening 320, allowing for smoother flow of liquid when it exits from the through-groove 330. Figure 9 As shown, in some embodiments, a connecting strip 211 may be provided at the end of the second opening 210 to ensure that the rotation of the belt surfaces on both sides of the second opening 210 remains synchronized during the rotation of the first transmission belt 200.

[0028] like Figure 4 As shown, by adjusting the initial positions of multiple ground-penetrating radars 120, they move at the same speed. When the first transmission belt 200 rotates at a constant speed, the overlapping area of ​​the second opening 210 and the multiple first openings 130 is always opposite to the ground-penetrating radar 120. This avoids interference from the first transmission belt 200 and the fixed frame 100 on the detection of the ground-penetrating radar 120, thus improving the detection effect. In some embodiments, the width of the fixed frame 100 is adapted to the bottom surface of the channel 01 to be detected, and the number of ground-penetrating radars 120 is set according to the width of the fixed frame 100 and the detection range of a single ground-penetrating radar 120. The multiple ground-penetrating radars 120 are positioned at different locations in the axial direction, making the detection area more comprehensive.

[0029] In this embodiment, by installing multiple axially movable ground-penetrating radars 120 within the fixed frame 100, the detection by the ground-penetrating radars 120 becomes denser and more comprehensive, thereby improving the detection effect. By installing a second transmission belt 300 on the outside of the fixed frame 100, the rotation of the second transmission belt 300 drives the fixed frame 100 to move. This not only ensures a tighter fit between the second transmission belt 300 and the concrete surface of the channel 01 bottom, but also reduces the wear risk of the detection device and increases its service life. By setting a first opening 130 on the fixed frame 100 opposite to the moving path of the ground-penetrating radar 120, a second opening 210 on the first transmission belt 200 inside the fixed frame 100, and a third opening 310 and a fourth opening 320 on the second transmission belt 300 on the outer side, and by setting an air-blowing assembly 400 to deliver high-pressure gas into the fixed frame 100, after the detection device is submerged in water, the liquid at the bottom of the fixed frame 100, under the action of high-pressure gas, flows through the overlapping area of ​​the first opening 130 and the second opening 210, then through the third opening 310 or the fourth opening 320, and is discharged from the channel 330. This discharge of liquid between the ground-penetrating radar 120 and the concrete surface at the bottom of the channel 01 avoids interference with the detection of the ground-penetrating radar 120, thus improving the detection accuracy of the ground-penetrating radar 120.

[0030] The outer wall of the second transmission belt 300 is provided with a wear-resistant layer.

[0031] In this embodiment, by providing a wear-resistant layer on the outer wall surface of the second transmission belt 300, the wear resistance of the second transmission belt 300 is improved, thereby increasing its service life.

[0032] The width dimensions of the first opening 130 and the second opening 210 are the same.

[0033] In this embodiment, the width of the first opening 130 and the second opening 210 are the same, so that the overlapping area of ​​the first opening 130 and the second opening 210 is close to a rectangle, which is closer to the detection range of the ground-penetrating radar 120. This reduces the risk of external liquid seepage while ensuring that the detection of the ground-penetrating radar 120 is not blocked or interfered with by the first transmission belt 200.

[0034] Between the two side plates 110, there are multiple rotatable ball screws 140 and multiple first motors 150 for driving the ball screws 140 to rotate. Each ball screw 140 is threadedly connected to a corresponding ground-penetrating radar 120. The first motor 150 is connected to a drive gear 151, which meshes with the driven gear 141 at the end of the ball screw 140.

[0035] like Figure 4As shown, multiple ball screws 140, multiple first motors 150, and multiple ground-penetrating radars 120 correspond one-to-one. The ball screws 140 pass through the housings of the ground-penetrating radars 120 and are threadedly connected to the housings of the ground-penetrating radars 120. When the ball screws 140 rotate under the drive of the first motors 150, the ground-penetrating radars 120 move along the axial direction of the ball screws 140.

[0036] The solution in this embodiment uses a first motor 150, a drive gear 151, a driven gear 141, and a ball screw 140 to drive the ground-penetrating radar 120 to move axially. This not only has a simple structure but also stable operation.

[0037] In some preferred embodiments, a guide rod passing through the housing of the ground-penetrating radar 120 is also provided between the two side plates 110 to prevent the ground-penetrating radar 120 from rotating during axial movement, which would cause the detection area to be skewed.

[0038] like Figures 3-6 As shown, a drive roller 160 and multiple support rollers 170 are arranged between the two side plates 110. The drive roller 160 and the multiple support rollers 170 cooperate to support and tension the first transmission belt 200. A second motor 180 is fixed to the inner side of the side plate 110. The second motor 180 is connected to a first gear 181. The drive roller 160 is provided with teeth 161 that mesh with the first gear 181. When the second motor 180 rotates at a constant speed, it drives the first gear 181 to rotate, thereby driving the drive roller 160 that meshes with the first gear 181 to rotate, and further driving the first transmission belt 200 that is in frictional contact with the drive roller 160 to rotate. The two ends of the drive roller 160 pass through the two side plates 110 respectively and are respectively connected to the second gears 162. A third gear 114 is coaxially fixed to the inner side of the two support wheels 113 opposite to the drive roller 160. The two third gears 114 correspond one-to-one with the two second gears 162 and mesh with each other. When the drive roller 160 drives the second gear 162 to rotate, the third gear 114 meshing with the second gear 162 rotates synchronously, thereby driving the support wheel 113 to rotate, and in turn driving the friction belt 350 and the second transmission belt 300 to rotate.

[0039] Both the third opening 310 and the fourth opening 320 are inclined from the inside outwards, away from the direction of rotation.

[0040] In this embodiment, the third opening 310 and the fourth opening 320 are set to be inclined from the inside to the outside, away from the direction of rotation. This allows the liquid to flow through the third opening 310 or the fourth opening 320 and be discharged through the channel 330 under the pressure of high-pressure gas. This not only prevents the liquid from seeping into the interior, but also blows open the concrete area to be tested on the bottom of the channel 01 in advance, further improving the accuracy of the test results.

[0041] The third opening 310 and the fourth opening 320 have the same inclination angle and are staggered along the rotation direction of the second transmission belt 300. The centerline of any third opening 310 extends to the opposite side and, together with the extension of the centerline of the nearest fourth opening 320 on the opposite side, forms a symmetrical V-shaped auxiliary line 340. The first transmission belt 200 and the second transmission belt 300 rotate in opposite directions, and the first transmission belt 200 is longer than the second transmission belt 300. For every one revolution of the first transmission belt 200, the second transmission belt 300 rotates in the opposite direction by the width of the opening of the V-shaped auxiliary line 340. During one revolution of the first transmission belt 200, when the end of the second opening 210 overlaps with the first opening 130, it simultaneously overlaps with the converging end of a V-shaped auxiliary line 340.

[0042] like Figure 8 As shown, the V-shaped auxiliary line 340 corresponds to the movement path of the ground-penetrating radar 120 relative to the second transmission belt 300. By adjusting the size of the drive roller 160, the number of times the drive roller 160 drives the first transmission belt 200 to complete one full rotation can be adjusted. By adjusting the number of teeth of the second gear 162 and the third gear 114, the distance that the drive roller 160 drives the second transmission belt 300 to rotate when it rotates one full rotation can be adjusted, so that when the first transmission belt 200 rotates one full rotation, the second transmission belt 300 moves in the opposite direction exactly by the opening width of the V-shaped auxiliary line 340.

[0043] In this embodiment, the first drive belt 200 and the second drive belt 300 rotate in opposite directions. During one revolution of the first drive belt 200, when the end of the second opening 210 overlaps with the first opening 130, it also overlaps with the converging end of a V-shaped auxiliary line 340. This ensures that during the rotation of the first drive belt 200 and the second drive belt 300: when the geological radar 120 moves along the centerline of the third opening 310 in the area where the third opening 310 is located, the overlapping area of ​​the first opening 130, the second opening 210, and the third opening 310 is always opposite to the geological radar 120; when the geological radar 120 moves along the centerline of the fourth opening 320 in the area where the fourth opening 320 is located, the overlapping area of ​​the first opening 130, the second opening 210, and the fourth opening 320 is always opposite to the geological radar 120. This reduces the interference of the first drive belt 200 and the second drive belt 300 on the geological radar 120 and improves the detection accuracy of the geological radar 120.

[0044] In some preferred embodiments, the gaps between two adjacent third openings 310 and between two adjacent fourth openings 320 can be set very small. While ensuring the overall structural stability of the second transmission belt 300, the shielding area of ​​the ground-penetrating radar 120 from the second transmission belt 300 is reduced when the ground-penetrating radar 120 moves along the extension of the center line of the fourth opening 320 near the half of the third opening 310, and when the ground-penetrating radar 120 moves along the extension of the center line of the third opening 310 near the half of the fourth opening 320, thereby reducing the degree of interference and improving the detection accuracy.

[0045] The number of third openings 310 set within the opening of a V-shaped auxiliary line 340 is one less than the number of ground-penetrating radars 120.

[0046] In this embodiment, the number of third openings 310 within the opening of a V-shaped auxiliary line 340 is one less than the number of ground-penetrating radars 120. This ensures that as one ground-penetrating radar 120 moves relative to the second transmission belt 300 along the V-shaped auxiliary line 340, the other ground-penetrating radars 120 also move along their corresponding V-shaped auxiliary lines 340. This guarantees that when each ground-penetrating radar 120 moves to overlap with the third opening 310 / fourth opening 320, and its movement path coincides with the centerline of the third opening 310 / fourth opening 320, that ground-penetrating radar 120 is simultaneously opposite the overlapping area of ​​the first opening 130 and the second opening 210.

[0047] In some embodiments, the number of third openings 310 is an integer multiple of the number of ground-penetrating radars 120.

[0048] The end of the second opening 210 is provided with a straight section, and the converging end of the V-shaped auxiliary line 340 is also provided with a gap.

[0049] The first motor 150 is configured to rotate periodically at a constant speed in both directions, causing the ball screw 140 to rotate periodically in both directions, thereby causing the ground-penetrating radar 120 to move back and forth along the axial direction.

[0050] In this embodiment, by setting a straight section at the end of the second opening 210 and also setting an interval at the converging end of the V-shaped auxiliary line 340, the ground-penetrating radar 120 moving to the end of the first opening 130 is given time to change direction, thereby avoiding the ground-penetrating radar 120 changing direction too late and ensuring the detection effect.

[0051] The air blowing assembly 400 may generally include: an air supply device 410, an air supply pipe 420, and an air blowing nozzle 430.

[0052] The gas supply device 410 is installed outside the fixed frame 100 and moves synchronously with the fixed frame 100. One end of the gas supply pipe 420 is connected to the gas supply device 410, and the other end is connected to the fixed frame 100, for conveying high-pressure gas. The air blowing nozzle 430 is connected to the gas supply pipe 420 and is used to spray high-pressure gas into the fixed frame 100.

[0053] like Figure 1 As shown, the air supply device 410 is placed on the bank of channel 01. Rollers may be installed at the bottom of the air supply device 410, allowing it to move synchronously with the fixed frame 100. Figure 4 As shown, in some embodiments, the air blowing nozzle 430 is positioned above the ground-penetrating radar 120, and is generally in an inverted U-shape, moving synchronously with the ground-penetrating radar 120. The air blowing nozzle 430 includes two nozzles located on either side of the ground-penetrating radar 120. An elongated hole is provided at the bottom of the air blowing nozzle 430, and the air blowing nozzle 430 is sleeved on the air supply pipe 420. The nozzle and the elongated hole are connected, thereby directly delivering high-pressure gas to the area below the ground-penetrating radar 120.

[0054] In this embodiment, the air nozzle 430 sprays high-pressure gas into the area where the ground-penetrating radar 120 is located, thereby avoiding liquid interference to the detection area of ​​the ground-penetrating radar 120 and ensuring detection accuracy.

[0055] The specific working process of the underwater detection device for concrete defects in channel lining provided by the present invention will be described in conjunction with the above embodiments: First, place the air blowing assembly 400 on the bank of channel 01, and then place the fixing frame 100 on the bottom of channel 01.

[0056] The air blowing assembly 400 is activated to deliver high-pressure gas into the fixed frame 100, forcing the liquid at the bottom of the fixed frame 100 to pass through the overlapping area of ​​the first opening 130 and the second opening 210, and then through the third opening 310 or the fourth opening 320 before being discharged from the through groove 330.

[0057] The first motor 150 is started, driving the ball screw 140 to rotate via the drive gear 151 and the driven gear 141, causing the ground-penetrating radar 120 to reciprocate axially. Simultaneously, the second motor 180 is started, driving the drive roller 160 to rotate via the first gear 181 and the teeth 161 on the drive roller 160. The rotation of the drive roller 160 drives the first transmission belt 200 to rotate, and the overlapping area of ​​the second opening 210 on the first transmission belt 200 and the first opening 130 on the fixed frame 100 is always opposite to the ground-penetrating radar 120.

[0058] The rotation of the drive roller 160 simultaneously drives the support wheel 113 to rotate in the opposite direction via the second gear 162 and the third gear 114. The reverse rotation of the support wheel 113 drives the second transmission belt 300 to rotate in the opposite direction. The rotation of the second transmission belt 300 drives the fixed frame 100 to move. During the movement of the fixed frame 100, when the ground-penetrating radar 120 moves to overlap with the third opening 310 / fourth opening 320, and its movement path coincides with the center line of the third opening 310 / fourth opening 320, the ground-penetrating radar 120 is simultaneously opposite to the overlapping area of ​​the first opening 130 and the second opening 210.

[0059] This embodiment also provides an underwater detection method for concrete defects in channel lining, which is used to perform any of the above-described underwater detection devices for concrete defects in channel lining, and includes the following steps: Step S100: Place the underwater detection device for concrete defects used in channel lining into the channel 01 to be inspected.

[0060] Step S200: Control the underwater detection device for concrete defects used in channel lining to move along channel 01 and detect the bottom surface of channel 01.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An underwater detection device for concrete defects in channel lining, characterized in that, include: The fixed frame is a horizontally placed cylindrical shape with an elliptical vertical cross-section. The fixed frame has a side plate at each end, and multiple ground-penetrating radars that can move along the axial direction of the fixed frame are installed inside the fixed frame; the bottom surface of the fixed frame has multiple rectangular first openings, which are one-to-one with the movement paths of the multiple ground-penetrating radars. A first transmission belt is rotatably disposed inside the fixed frame, with its belt surface in contact with the bottom surface of the fixed frame; the first transmission belt is provided with a second opening in a V shape that is connected end to end along the rotation direction; when the first transmission belt rotates, the overlapping area of ​​the second opening and the first opening is always opposite to the corresponding ground-penetrating radar. The second transmission belt is rotatably disposed on the outside of the fixed frame and is used to drive the fixed frame to move in a direction perpendicular to the axis of the fixed frame. One side of the second transmission belt is provided with a plurality of evenly arranged third openings, and the other side is provided with a plurality of evenly arranged fourth openings. The outer wall of the second transmission belt is provided with a plurality of through grooves on both sides, and each of the third openings and each of the fourth openings is connected to one of the through grooves on its outer side. An air blowing assembly, connected to the side plate, is used to output high-pressure gas into the interior of the fixed frame, forcing the liquid at the bottom of the fixed frame to flow through the overlapping area of ​​the first opening and the second opening, and then through the third opening or the fourth opening before being discharged from the through groove.

2. The underwater detection device for concrete defects in channel lining according to claim 1, characterized in that, The outer wall surface of the second transmission belt is provided with a wear-resistant layer.

3. The underwater detection device for concrete defects in channel lining according to claim 1, characterized in that, The width of the first opening and the second opening are the same.

4. The underwater detection device for concrete defects in channel lining according to claim 1, characterized in that, A plurality of rotatable ball screws and a plurality of first motors for driving the ball screws to rotate are provided between the two side plates, and each ball screw is threadedly connected to a corresponding ground-penetrating radar. The first motor is connected to a drive gear, which meshes with the driven gear at the end of the ball screw.

5. The underwater detection device for concrete defects in channel lining according to claim 1, characterized in that, Both the third opening and the fourth opening are inclined from the inside outwards, away from the direction of rotation.

6. The underwater detection device for concrete defects in channel lining according to claim 5, characterized in that, The third opening and the fourth opening have the same inclination angle and are staggered along the rotation direction of the second transmission belt; after the center line of any of the third openings extends to the opposite side, it is sandwiched by the extension line of the center line of the nearest fourth opening on the opposite side to form a symmetrical V-shaped auxiliary line. The first transmission belt and the second transmission belt rotate in opposite directions, and the first transmission belt is longer than the second transmission belt; when the first transmission belt rotates one revolution, the second transmission belt rotates in the opposite direction by the width of the opening of the V-shaped auxiliary line; during the rotation of the first transmission belt one revolution, when the end of the second opening overlaps with the first opening, it also overlaps with the converging end of the V-shaped auxiliary line.

7. The underwater detection device for concrete defects in channel lining according to claim 6, characterized in that, The number of third openings within an opening of the V-shaped auxiliary line is one less than the number of ground-penetrating radars.

8. The underwater detection device for concrete defects in channel lining according to claim 6, characterized in that, The second opening has a straight section at its end, and the converging end of the V-shaped auxiliary line also has a gap.

9. The underwater detection device for concrete defects in channel lining according to claim 1, characterized in that, The air blowing assembly includes: An air supply device is installed outside the fixed frame and moves synchronously with the fixed frame. The gas supply pipe is connected at one end to the gas supply device and at the other end to the fixed frame, and is used to transport high-pressure gas. An air nozzle, connected to the air supply pipe, is used to spray high-pressure gas into the fixed frame.

10. An underwater detection method for concrete defects in channel lining, characterized in that, The underwater detection device for concrete defects in channel lining as described in any one of claims 1 to 9 comprises the following steps: The underwater detection device for concrete defects in channel lining is placed inside the channel to be inspected. The underwater detection device for concrete defects in channel lining is controlled to move along the channel and to detect the bottom surface of the channel.

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