Ultrasonic flaw detector for bridge detection

Abstract

The invention relates to the related technical field of ultrasonic flaw detectors, and discloses an ultrasonic flaw detector for bridge detection, which comprises a radar positioning device arranged above an unmanned trolley body and used for positioning detection, and a flaw detection assembly fixedly arranged below the unmanned trolley body and used for flaw detection of a bridge, the flaw detection assembly comprises a chassis mounting frame, and a cleaning assembly, a roller assembly, an ultrasonic detection assembly and a driving assembly are sequentially mounted at the bottom of the chassis mounting frame from front to back; the roller outer-layer shell of the coupling liquid roller can make direct contact with the bridge surface, an inner-layer roller body for storing coupling liquid is arranged in the roller outer-layer shell, liquid discharging is controlled through the coupling liquid discharging assembly by means of pressure, the coupling liquid is discharged in cooperation with pressure relief of the pushing pipe, and the coupling liquid can evenly cover the bridge surface; air interference during ultrasonic detection is effectively reduced, and the accuracy and reliability of flaw detection are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field related to ultrasonic flaw detectors, and more specifically, particularly relates to an ultrasonic flaw detector for bridge inspection. Background Art

[0002] The ultrasonic flaw detector for bridge inspection is based on the propagation characteristics of ultrasound. When ultrasound propagates in the bridge structure material, it will reflect, refract and scatter when encountering the interface of different media (such as defects, cracks, etc.). The flaw detector emits ultrasonic pulses, receives the reflected ultrasonic signal, and analyzes the time, amplitude and other characteristics of the signal to determine whether there are defects inside the bridge and the location, size and shape of the defects. However, the ultrasonic flaw detector in the prior art has the following defects: In the prior art, handheld ultrasonic flaw detectors for bridges require inspectors to hold the equipment to inspect point by point and section by section. For large-scale bridges, which are large-area and long-distance inspection objects, the inspection speed will be very slow and it is difficult to meet the needs of rapid inspection. In particular, when facing urgent inspection tasks or needing to complete a large amount of inspection work in a short period of time, the problem of low efficiency will be more prominent. In the prior art, when using the bridge ultrasonic flaw detector, it is necessary to manually apply coupling liquid to the detection surface in order to achieve accurate detection results. However, the manual application of coupling liquid requires the detection personnel to hold tools and apply it to the detection points or detection areas one by one. Especially for large bridge structures, the detection area is large and the range to be applied is wide, which will consume a lot of time and manpower. In the prior art, the roller for applying coupling fluid in ultrasonic flaw detectors is usually a hard roller, which is difficult to cover all positions during application. Some bridges have arc-shaped structures, such as arch ribs, circular piers, etc. When applying these arc-shaped surfaces, the hard roller is difficult to fully adapt to the curvature changes of the arc due to its linear rolling characteristics, resulting in uneven application of coupling fluid, and too much or too little application at the top and bottom of the arc, affecting the propagation and detection effect of ultrasonic waves.

[0003] Therefore, in view of this, research and improvement are carried out on the existing structure and defects, and an ultrasonic flaw detector for bridge inspection is provided, in order to achieve a more practical and valuable purpose. Summary of the invention

[0004] The present invention provides an ultrasonic flaw detector for bridge inspection, which is used to overcome the above-mentioned defects in the prior art.

[0005] The purpose and effect of the ultrasonic flaw detector for bridge inspection of the present invention are achieved by the following specific technical means: An ultrasonic flaw detector for bridge inspection comprises an unmanned vehicle body, a radar positioning device for positioning detection is installed above the unmanned vehicle body, a flaw detection component for flaw detection of the bridge is fixedly installed below the unmanned vehicle body, the flaw detection component comprises a chassis mounting frame, and a cleaning component, a roller component, an ultrasonic detection component and a driving component are sequentially installed at the bottom of the chassis mounting frame from front to back; The ultrasonic detection assembly includes an air cavity box and a coupling liquid drum, wherein a micro air pump for inflating and replenishing the coupling liquid drum is installed inside the air cavity box, wherein the coupling liquid drum includes an outer drum shell, wherein the outer drum shell is in direct contact with the bridge surface, wherein an inner drum shell for storing coupling liquid is installed inside the outer drum shell, wherein a coupling liquid discharge assembly for controlling the discharge of liquid by pressure is installed inside the inner drum shell; A push tube for relieving pressure and discharging coupling liquid is also connected between the outer shell of the drum and the inner cylinder. One end of the push tube is connected to the outer shell of the drum, and the other end of the push tube is connected to the coupling liquid discharge assembly.

[0006] A further technical solution is that an outer partition is fixedly installed between the outer shell of the drum and the inner cylinder, and the outer partition divides the interior of the outer shell of the drum into an outer air cavity layer and an air cavity layer, the air cavity layer is close to one side of the inner cylinder, and the outer air cavity layer is close to the inner side of the outer shell of the drum, the outer air cavity layer is used to store solution or spray liquid, and the air cavity layer is used to store gas, so that the coupling liquid drum reaches an inflated state and can roll with the measuring surface.

[0007] A further technical solution is that side slide grooves are fixedly installed on the inner walls of both sides of the inner cylinder, and limit blocks are installed in the side slide grooves. Extrusion components are installed on the upper and lower sides of the limit blocks. The extrusion component includes an extrusion push plate, and extrusion springs are fixedly installed between the two ends of the extrusion push plate and the limit blocks. An intermediate partition is fixedly installed between the limit blocks on both sides, and the intermediate partition divides the interior of the extrusion push plate into two solution chambers, which are used to store coupling liquid.

[0008] A further technical solution is that a cavity is provided inside the air cavity box, and a micro air pump is installed inside the cavity, and the rest of the cavity of the air cavity box is a liquid cavity, and a left-end mounting base and a right-end mounting base are fixedly installed below the air cavity box, the left-end mounting base is arranged on the left side of the right-end mounting base, and the right-end mounting base is arranged on one side of the micro air pump, and the coupling liquid roller is rotatably provided on the left-end mounting base and the right-end mounting base, and a liquid pipe is connected between the coupling liquid roller and the liquid cavity of the air cavity box, a one-way liquid flow valve is installed at the connection between one end of the liquid pipe and the air cavity box, and the other end of the liquid pipe is communicated with the interior of the solution cavity, an air pipe is penetrated inside the right-end mounting base, one end of the air pipe is connected to the micro air pump, and the other end of the air pipe is communicated with the air cavity layer and the interior of the outer air cavity layer.

[0009] A further technical solution is that a plurality of nozzles are arranged in an array on the outside of the outer shell of the drum, and the push tubes are socketed inside the plurality of nozzles, the push tube comprises a tube body, a plug is arranged on the upper end of the tube body, a plurality of drainage ports are arranged below the plug, the drainage ports are connected with the inside of the tube body, a one-way valve is also arranged between the drainage port and the tube body, the lower end of the tube body is connected with the inside of the solution cavity, a connecting pressure plate is fixedly installed on the plurality of push tubes arranged in the array, the connecting pressure plate is movably installed on the push tube, a block is arranged on the outside of the push tube, and the block limits the connecting pressure plate.

[0010] A further technical solution is that the ultrasonic detection component includes two groups of telescopic motors, and the front ends of the two groups of telescopic motors are fixedly connected with ultrasonic detection probes, and a scraper plate assembly is also fixedly installed on the side of the ultrasonic detection probe close to the coupling liquid roller, and the scraper plate assembly includes a scraper plate box body, and the open end of the scraper plate box body is provided with a front scraper head, and the front scraper head is in contact with the surface of the outer shell of the roller, and the scraper plate box body is provided with a primary filter plate and the secondary filter plate, and the primary filter plate is arranged above the secondary filter plate, and the scraper plate box body is provided with a wiping plate on the side of the bridge contact surface.

[0011] According to a further technical solution, the outer contact surface of the outer shell of the drum is made of adsorbent cotton, and the plurality of nozzles provided on the surface of the outer shell of the drum are arranged in a plum blossom shape.

[0012] According to a further technical solution, the driving assembly includes a driving housing, in which two sets of driving motors are relatively arranged, and the output ends of the driving motors are connected to track assemblies, and the track assemblies and the driving motors provide power output for the device.

[0013] According to a further technical solution, the cleaning assembly includes two sets of rotating motors symmetrically installed, and the output ends of the rotating motors are fixedly connected with brushes, which are in contact with the bridge detection surface.

[0014] According to a further technical solution, a light display assembly and a camera assembly are provided on one side of the unmanned vehicle body, the camera assembly is arranged on the right side of the light display assembly, and a control panel assembly is installed on the upper side of the camera assembly and the light display assembly.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The ultrasonic flaw detector for bridge inspection of the present invention is provided with a coupling liquid drum, the outer drum shell of the coupling liquid drum is in direct contact with the bridge surface, and an inner cylinder for storing coupling liquid is provided inside. The coupling liquid discharge component uses pressure control to discharge liquid, and cooperates with a push pipe to release pressure to discharge the coupling liquid, so that the coupling liquid can evenly cover the bridge surface, effectively reduce air interference during ultrasonic inspection, and improve the accuracy and reliability of flaw detection. The outer air cavity layer is used for storing solution or spraying liquid, and can cooperate with a nozzle to realize the release of solution or spraying liquid according to actual inspection needs, such as performing auxiliary operations such as cleaning and marking during the inspection process, thereby improving the convenience and efficiency of inspection.

[0016] The ultrasonic flaw detector for bridge inspection of the present invention is provided with an outer air cavity layer and an air cavity layer. The air cavity layer is used to store gas so that the coupling liquid roller reaches an inflated state. This inflated state allows the coupling liquid roller to better roll with the bridge measurement surface. When the flaw detector is working, the coupling liquid roller can move smoothly along the bridge surface, which is convenient for detecting different positions and improving the detection efficiency and coverage. The outer air cavity layer is used to store solution or spray liquid. During the flaw detection process, the solution stored in the outer air cavity layer can be sprayed onto the bridge surface through a nozzle as needed.

[0017] The ultrasonic flaw detector for bridge inspection of the present invention is provided with a scraper plate assembly. During the ultrasonic inspection process, the coupling liquid roller will smear coupling liquid on the surface of the bridge to ensure that the ultrasonic wave can be effectively transmitted to the bridge structure. However, too much coupling liquid may interfere with the propagation path of the ultrasonic wave, resulting in errors in the inspection result. The front scraper head in the scraper plate assembly is in contact with the surface of the outer shell of the roller. During the movement of the flaw detector, the excess coupling liquid on the surface of the outer shell of the roller can be scraped off in time to avoid the excess coupling liquid from dripping into the inspection area, thereby ensuring that the ultrasonic inspection probe receives accurate signals and improving the inspection accuracy. The scraper plate box can collect the scraped coupling liquid to avoid the coupling liquid from dripping randomly to cause waste and environmental pollution. By recycling the coupling liquid, the inspection cost can be reduced and the resource utilization rate can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention; Figure 2 It is a schematic diagram of the overall top view structure of the present invention; Figure 3 It is a schematic diagram of the overall side view structure of the present invention; Figure 4 It is a schematic diagram of the overall front view structure of the present invention; Figure 5 It is a schematic diagram of the overall structure of the flaw detection component and the crawler component in the present invention; Figure 6 It is a schematic diagram of the overall front section of the flaw detection component and the crawler component in the present invention; Figure 7 It is a stereoscopic diagram of the cleaning component, the roller component and the ultrasonic detection component in the present invention; Figure 8 The present invention is a schematic diagram of the overall front section of the ultrasonic detection assembly; Fig. 9 For the present invention Figure 8 A schematic diagram of the partial enlarged structure of the coupling liquid drum; Fig.10 A schematic side cross-sectional view of the flaw detection assembly of the present invention; Fig.11 For the present invention Fig.10 A schematic diagram of the structure at B in the figure is enlarged; Fig.12 For the present invention Fig.10 An enlarged schematic diagram of the structure of the outer shell of the drum; Fig.13 For the present invention Fig. 9 A in the figure is an enlarged structural diagram.

[0021] Description of reference numerals: Unmanned vehicle body 11, radar positioning device 12, flaw detection component 13, crawler component 14, camera component 15, light display component 16, control panel component 17, chassis mounting frame 18, cleaning component 19, roller component 20, micro air pump 21, ultrasonic detection component 22, drive component 23, drive motor 24, ultrasonic detection probe 25, wiper plate component 26, coupling liquid roller 27, air cavity box 28, roller outer shell 30, air cavity layer 31, outer air cavity layer 32, nozzle 33, connection pressure Force plate 34, outer partition 35, push tube 36, inner cylinder 38, side slide groove 39, extrusion push plate 40, middle partition 41, extrusion spring 42, limit block 43, solution cavity 44, liquid pipe 45, one-way liquid flow valve 46, tube body 47, air pipe 48, right end mounting base 49, left end mounting base 50, scraper plate box body 51, front scraper head 52, primary filter plate 53, secondary filter plate 54, wiping plate 55, plug 56, drain port 57, one-way valve 58, rotating motor 59, brush 60, telescopic motor 61. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] As attached Figure 1 To Attachment Fig.13 As shown: The present invention provides an ultrasonic flaw detector for bridge inspection, comprising an unmanned vehicle body 11, a radar positioning device 12 for positioning detection is installed above the unmanned vehicle body 11, a flaw detection component 13 for flaw detection of the bridge is fixedly installed below the unmanned vehicle body 11, the flaw detection component 13 comprises a chassis mounting frame 18, and a cleaning component 19, a roller component 20, an ultrasonic detection component 22 and a driving component 23 are installed in sequence at the bottom of the chassis mounting frame 18 from front to back; The ultrasonic detection component 22 includes an air cavity box 28 and a coupling liquid drum 27. A micro air pump 21 for inflating and replenishing the coupling liquid drum 27 is installed inside the air cavity box 28. The coupling liquid drum 27 includes a drum outer shell 30. The drum outer shell 30 is in direct contact with the bridge surface. An inner cylinder 38 for storing coupling liquid is installed inside the drum outer shell 30. A coupling liquid discharge component for controlling the discharge of liquid by pressure is also installed inside the inner cylinder 38. A push tube 36 for relieving pressure and discharging coupling liquid is also connected between the outer shell 30 of the drum and the inner cylinder 38. One end of the push tube 36 is connected to the outer shell 30 of the drum, and the other end of the push tube 36 is connected to the coupling liquid discharge assembly.

[0026] Preferably, see Attachment Fig. 9 An outer layer partition 35 is fixedly installed between the outer shell 30 of the drum and the inner shell 38. The outer layer partition 35 divides the interior of the outer shell 30 of the drum into an outer layer air cavity layer 32 and an air cavity layer 31. The air cavity layer 31 is close to one side of the inner shell 38, and the outer layer air cavity layer 32 is close to the inner side of the outer shell 30 of the drum. The outer layer air cavity layer 32 is used to store solution or spray liquid, and the air cavity layer 31 is used to store gas, so that the coupling liquid drum 27 can reach an inflated state and roll with the measuring surface. The air cavity layer 31 is close to the inner shell 38, and its main function is to store gas. After the gas is filled into the air cavity layer 31, the coupling liquid roller 27 reaches an inflated state, and the structure of the entire roller has a certain elasticity and supporting force, so that the roller can achieve stable rolling with the measuring surface. During the rolling process, the cushioning and supporting effects provided by the gas in the air cavity layer 31 ensure good contact between the roller and the measuring surface, ensure the accuracy of the measurement, and also reduce the wear between the roller and the measuring surface, thereby extending the service life of the roller.

[0027] Preferably, see Attachment Fig. 9The inner walls of both sides of the inner cylinder 38 are fixedly installed with side slide grooves 39, and limit blocks 43 are installed in the side slide grooves 39. Extrusion components are installed on the upper and lower sides of the limit blocks 43. The extrusion component includes an extrusion push plate 40, and extrusion springs 42 are fixedly installed between the two ends of the extrusion push plate 40 and the limit blocks 43. An intermediate partition 41 is fixedly installed between the limit blocks 43 on both sides. The intermediate partition 41 divides the interior of the extrusion push plate 40 into two solution chambers 44, and the solution chamber 44 is used to store coupling liquid. The extrusion spring 42 is a key part of the extrusion assembly. It can effectively buffer the impact force when the roller contacts the measuring surface. When the roller is subjected to a large external force, the extrusion spring will undergo elastic deformation to absorb and disperse energy to prevent excessive pressure from directly acting on the inner cylinder 38 and other internal structures, thereby reducing the risk of structural damage and extending the service life of the roller.

[0028] Preferably, see Attachment Figure 8 The air cavity box 28 is provided with a cavity inside, and a micro air pump 21 is installed inside the cavity. The rest of the cavity of the air cavity box 28 is a liquid cavity. A left-end mounting base 50 and a right-end mounting base 49 are fixedly installed below the air cavity box 28. The left-end mounting base 50 is arranged on the left side of the right-end mounting base 49, and the right-end mounting base 49 is arranged on one side of the micro air pump 21. The coupling liquid roller 27 is rotatably provided on the left-end mounting base 50 and the right-end mounting base 49. A liquid pipe 45 is connected between the coupling liquid drum 27 and the liquid cavity of the air cavity box 28, a one-way liquid flow valve 46 is installed at the connection between one end of the liquid pipe 45 and the air cavity box 28, the other end of the liquid pipe 45 is connected to the inside of the solution cavity 44, an air pipe 48 is provided inside the right end mounting base 49, one end of the air pipe 48 is connected to the micro air pump 21, and the other end of the air pipe 48 is connected to the inside of the air cavity layer 31 and the outer air cavity layer 32, and the micro air pump 21 inside the air cavity box 28 is the core component of the gas supply. It can generate compressed gas and provide a power source for the entire system. Through the air pipe 48, the micro air pump 21 delivers compressed gas to the air cavity layer 31 of the coupling liquid roller 27 and the outer air cavity layer 32. For the air cavity layer 31, the filling of gas makes the coupling liquid roller 27 reach an inflated state, so that the roller has a certain elasticity and supporting force, can stably contact with the measuring surface and achieve smooth rolling, ensuring the smooth progress of the measurement work. For the outer air cavity layer 32, the entry of gas can assist the injection operation of the stored solution or the injection liquid. For example, when the measuring surface needs to be cleaned, lubricated or chemically treated, the gas pressure pushes the liquid to be ejected from a specific injection port to achieve the corresponding function.

[0029] Preferably, see Attachment Fig. 9 And attached Fig.12A plurality of nozzles 33 are arranged in an array on the outer side of the outer shell 30 of the drum, and the push tubes 36 are arranged in sockets inside the plurality of nozzles 33. The push tube 36 includes a tube body 47, and a plug 56 is arranged on the upper end of the tube body 47. A plurality of drainage ports 57 are arranged below the plug 56. The drainage ports 57 are communicated with the interior of the tube body 47. A one-way valve 58 is also arranged between the drainage ports 57 and the tube body 47. The lower end of the tube body 47 is communicated with the interior of the solution cavity 44. A connecting pressure plate 34 is fixedly mounted on the plurality of push tubes 36 arranged in the array, and the connecting pressure plate 34 is movably mounted on the push tube 36. A stopper is arranged on the outer side of the push tube 36, and the stopper limits the connecting pressure plate 34. The pressure is transmitted to the push tube 36 through the connecting pressure plate 34, so that the liquid in the solution cavity 44 is evenly sprayed onto the measuring surface through the drainage port 57 and the nozzle 33 of the push tube 36 under the action of pressure. This design can automatically control the spraying of liquid according to the contact between the roller and the measuring surface, ensuring the continuous supply and uniform coverage of liquid during the measurement process, thereby improving the accuracy and efficiency of the measurement.

[0030] Preferably, see Attachment Fig.10 The ultrasonic detection component 22 includes two groups of telescopic motors 61, and the front ends of the two groups of telescopic motors 61 are fixedly connected with ultrasonic detection probes 25. A scraper assembly 26 is also fixedly installed on the side of the ultrasonic detection probe 25 close to the coupling liquid drum 27. The scraper assembly 26 includes a scraper box body 51, and a front scraper head 52 is provided at the open end of the scraper box body 51. The front scraper head 52 contacts the surface of the outer shell 30 of the drum. A primary filter plate 53 and a secondary filter plate 54 are provided inside the scraper box body 51. The primary filter plate 53 is arranged above the secondary filter plate 54. A wiping plate 55 is provided on the side of the scraper box body 51 close to the bridge contact surface. The front scraper head 52 contacts the surface of the outer shell 30 of the drum. During the rolling process of the drum, the front scraper head 52 can scrape off excess coupling liquid and attached impurities on the surface of the outer shell 30 of the drum. This can prevent excessive liquid and impurities from affecting the contact between the ultrasonic detection probe 25 and the measured object, ensure that the ultrasonic signal can be accurately transmitted, and improve the reliability of the detection. The primary filter plate 53 is arranged above the secondary filter plate 54, and they filter the liquid and impurities scraped off by the front scraper 52. Through two-stage filtration, larger particles and fine impurities in the liquid can be effectively removed, so that the recovered coupling liquid can be recycled.

[0031] Preferably, see Attachment Fig. 9 The outer contact surface of the drum outer shell 30 is made of adsorbent cotton material, and the plurality of nozzles 33 provided on the surface of the drum outer shell 30 are arranged in a plum blossom shape.

[0032] Preferably, see Attachment Figure 6 The driving assembly 23 includes a driving housing, in which two sets of driving motors 24 are arranged relatively to each other. The output end of the driving motor 24 is connected to a track assembly 14. The track assembly 14 and the driving motor 24 provide power output for the device.

[0033] Preferably, see Attachment Figure 6 The cleaning assembly 19 includes two sets of rotating motors 59 symmetrically installed, and the output end of the rotating motor 59 is fixedly connected with a brush 60, and the brush 60 is in contact with the bridge detection surface.

[0034] Preferably, see Attachment Figure 1 A light display assembly 16 and a camera assembly 15 are provided on one side of the unmanned vehicle body 11. The camera assembly 15 is arranged on the right side of the light display assembly 16. A control panel assembly 17 is installed on the upper side of the camera assembly 15 and the light display assembly 16.

[0035] Specific use of the present invention: When using the present invention, first place the present invention flatly on the bridge inspection surface, and then start the device. When the device is started, the radar positioning device 12 will provide positioning services to achieve precise positioning for the inspection route. Then the control panel component 17 will set the bridge thickness and set the scanning program. Then the lighting display component 16 will provide an operation display for the device, and the camera component 15 will provide a visual positioning service for the device to achieve more accurate positioning and flaw detection.

[0036] Then, when the equipment is running, the driving motor 24 arranged inside the flaw detection component 13 will provide operating power for the track component 14, so as to realize the movement effect of the equipment as a whole. Then, when the equipment is running forward, the cleaning component 19 arranged at the bottom of the flaw detection component 13 will clean the bridge deck. The two cleaning components 19 will run in opposite directions during operation, and will clean the dust in the middle to the outside. After cleaning, the coupling liquid roller 27 will roll and apply coupling liquid to the ground.

[0037] When the coupling liquid drum 27 is running, the micro air pump 21 arranged inside the air cavity box 28 will simultaneously transport gas to the inside of the coupling liquid drum 27, and partially fill its air cavity layer 31 and the outer air cavity layer 32 with gas. Then, when the outer shell 30 of the drum contacts the ground, it will be subjected to an extrusion force, which is transmitted to the extrusion push plate 40 through the push tube 36. Then, the extrusion push plate 40 will squeeze the liquid inside the solution cavity 44 and discharge it through the pressure relief valve at the connection between the push tube 36 and the solution cavity 44. The discharged liquid will enter the outer cavity through the tube body of the push tube 36. The outer air cavity layer 32 is disposed inside the push tube 36, and when the push tube 36 is displaced downward, the push tube 36 will synchronously drive the connection pressure plate 34 to move downward, and then after the downward movement, the plug 56 provided on the push tube 36 will move downward, and when the plug 56 moves downward, it will be separated from the nozzle 33, and the high-pressure gas inside the outer air cavity layer 32 will be sprayed outward, and the sprayed coupling liquid will cover the bridge detection surface, and after the covering is completed, it will be affected by the movement of the crawler assembly 14, and the coupling liquid roller 27 will roll, and the roller will initially realize the coupling The liquid is applied, and when the coupling liquid roller 27 rolls and absorbs the dust on the bridge detection surface, after the absorption is completed, the front scraper head 52 of the scraper plate assembly 26 will contact the surface of the outer shell 30 of the roller to form a scraper, and the scraped dust and coupling liquid mixture will be scraped by the front scraper head 52. After scraping, the coupling liquid mixture will enter the scraper plate box 51, and then the mixed liquid will initially pass through the primary filter plate 53 to achieve preliminary filtration, and after the preliminary filtration, it will enter the secondary filter plate 54, and then the secondary filter plate 54 will be again filtered. After filtration, the filtered coupling liquid will be accumulated on the wiping plate 55, and the accumulated coupling liquid will be adsorbed by the wiping plate 55. After the adsorption is completed, the bridge detection surface will be re-coated by the humidity of the wiping plate 55 itself. After the coating is completed, the telescopic motor 61 provided in the ultrasonic detection component 22 will extend to make the ultrasonic detection probe 25 fit with the bridge detection surface. After the fitting is completed, the ultrasonic detection probe 25 will realize real-time detection, and after the detection is completed, it will be uploaded to the system background in real time, and the detection structure will be evaluated by the system background.

[0038] And when the coupling liquid drum 27 is in operation, the air cavity layer 31 and the outer air cavity layer 32 provided on the coupling liquid drum 27 are gas-filled parts, and when the outer shell 30 of the drum contacts the concave and convex surface of the bridge deck, the outer shell 30 of the drum can be squeezed by the pushing plate 40 to be subjected to different squeezing forces to achieve increased amount of coupling liquid spraying on the bridge detection surface, and the contact points of each pushing tube 36 can realize adaptive coating of the coupling liquid on the bridge detection surface.

[0039] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. An ultrasonic flaw detector for bridge inspection, characterized in that: The invention comprises an unmanned vehicle body (11), a radar positioning device (12) for positioning detection is installed above the unmanned vehicle body (11), a flaw detection component (13) for performing flaw detection on a bridge is fixedly installed below the unmanned vehicle body (11), the flaw detection component (13) comprises a chassis mounting frame (18), and a cleaning component (19), a roller component (20), an ultrasonic detection component (22), and a driving component (23) are installed in sequence at the bottom of the chassis mounting frame (18) from front to back; The ultrasonic detection component (22) comprises an air cavity box (28) and a coupling liquid drum (27); a micro air pump (21) for inflating and replenishing the coupling liquid drum (27) is installed inside the air cavity box (28); the coupling liquid drum (27) comprises an outer drum shell (30); the outer drum shell (30) is in direct contact with the bridge surface; an inner drum body (38) for storing coupling liquid is installed inside the outer drum shell (30); a coupling liquid discharge component for controlling the discharge of liquid by pressure is installed inside the inner drum body (38); A push tube (36) for relieving pressure and discharging coupling liquid is also connected between the outer shell (30) of the drum and the inner shell (38); one end of the push tube (36) is connected to the outer shell (30) of the drum, and the other end of the push tube (36) is connected to the coupling liquid discharge assembly.

2. The ultrasonic flaw detector for bridge inspection according to claim 1, characterized in that: An outer layer partition (35) is fixedly installed between the outer layer shell (30) of the roller and the inner layer shell (38), and the outer layer partition (35) divides the interior of the outer layer shell (30) of the roller into an outer layer air cavity layer (32) and an air cavity layer (31), wherein the air cavity layer (31) is close to one side of the inner layer shell (38), and the outer layer air cavity layer (32) is close to the inner side of the outer layer shell (30) of the roller, the outer layer air cavity layer (32) is used to store solution or spray liquid, and the air cavity layer (31) is used to store gas, and enables the coupling liquid roller (27) to reach an inflated state so as to be able to roll with the measuring surface.

3. The ultrasonic flaw detector for bridge inspection according to claim 2 is characterized in that: Side slide grooves (39) are fixedly mounted on the inner walls of both sides of the inner cylinder (38), and limit blocks (43) are mounted in the side slide grooves (39). Extrusion components are mounted on the upper and lower sides of the limit blocks (43), and the extrusion components include an extrusion push plate (40). Extrusion springs (42) are fixedly mounted between the two ends of the extrusion push plate (40) and the limit blocks (43). A middle partition plate (41) is fixedly mounted between the limit blocks (43) on both sides, and the middle partition plate (41) divides the interior of the extrusion push plate (40) into two solution chambers (44), and the solution chambers (44) are used to store coupling liquid.

4. The ultrasonic flaw detector for bridge inspection according to claim 3 is characterized in that: The air cavity box (28) is provided with a cavity inside, and a micro air pump (21) is installed inside the cavity; the rest of the cavity of the air cavity box (28) is a liquid cavity; a left-end mounting base (50) and a right-end mounting base (49) are fixedly installed below the air cavity box (28); the left-end mounting base (50) is arranged on the left side of the right-end mounting base (49), and the right-end mounting base (49) is arranged on one side of the micro air pump (21); the coupling liquid roller (27) is rotatably provided on the left-end mounting base (50) and the right-end mounting base (49); A liquid tube (45) is connected between the coupling liquid roller (27) and the liquid cavity of the air cavity box (28); a one-way liquid flow valve (46) is installed at the connection between one end of the liquid tube (45) and the air cavity box (28); the other end of the liquid tube (45) is communicated with the interior of the solution cavity (44); an air tube (48) is provided running through the interior of the right end mounting base (49); one end of the air tube (48) is connected to the micro air pump (21); and the other end of the air tube (48) is communicated with the interior of the air cavity layer (31) and the outer air cavity layer (32).

5. The ultrasonic flaw detector for bridge inspection according to claim 4 is characterized in that: A plurality of nozzles (33) are arranged in an array on the outside of the outer shell (30) of the drum, and the push tubes (36) are arranged in sockets inside the plurality of nozzles (33). The push tubes (36) include a tube body (47), and a plug (56) is arranged at the upper end of the tube body (47). A plurality of drainage ports (57) are arranged below the plug (56). The drainage ports (57) are communicated with the inside of the tube body (47). A one-way valve (58) is also arranged between the drainage ports (57) and the tube body (47). The lower end of the tube body (47) is communicated with the inside of the solution chamber (44). A connecting pressure plate (34) is fixedly mounted on the plurality of pushing tubes (36) arranged in the array, and the connecting pressure plate (34) is movably mounted on the pushing tube (36). A stopper is arranged on the outside of the pushing tube (36), and the stopper limits the connecting pressure plate (34).

6. The ultrasonic flaw detector for bridge inspection according to claim 5, characterized in that: The ultrasonic detection assembly (22) comprises two groups of telescopic motors (61), the front ends of the two groups of telescopic motors (61) are fixedly connected with ultrasonic detection probes (25), a liquid scraper assembly (26) is also fixedly mounted on a side of the ultrasonic detection probe (25) close to the coupling liquid roller (27), the liquid scraper assembly (26) comprises a liquid scraper box body (51), a front scraper head (52) is provided at an open end of the liquid scraper box body (51), the front scraper head (52) is in contact with the surface of the outer shell (30) of the roller, a primary filter plate (53) and a secondary filter plate (54) are provided inside the liquid scraper box body (51), the primary filter plate (53) is arranged above the secondary filter plate (54), and a wiping plate (55) is provided on a side of the liquid scraper box body (51) close to the bridge contact surface.

7. The ultrasonic flaw detector for bridge inspection according to claim 6, characterized in that: The outer contact surface of the drum outer shell (30) is made of adsorbent cotton material, and a plurality of the nozzles (33) provided on the surface of the drum outer shell (30) are arranged in a plum blossom shape.

8. The ultrasonic flaw detector for bridge inspection according to claim 1, characterized in that: The drive assembly (23) comprises a drive housing, in which two sets of drive motors (24) are arranged opposite to each other, and the output ends of the drive motors (24) are connected to a track assembly (14). The track assembly (14) and the drive motors (24) provide power output for the device.

9. The ultrasonic flaw detector for bridge inspection according to claim 1, characterized in that: The cleaning assembly (19) comprises two sets of rotating motors (59) symmetrically installed, and a brush (60) is fixedly connected to the output end of the rotating motor (59), and the brush (60) is in contact with the bridge detection surface.

10. The ultrasonic flaw detector for bridge inspection according to claim 1, characterized in that: A light display assembly (16) and a camera assembly (15) are provided on one side of the unmanned vehicle body (11); the camera assembly (15) is arranged on the right side of the light display assembly (16); and a control panel assembly (17) is installed on the upper side of the camera assembly (15) and the light display assembly (16).

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