An ultrasonic flaw detector for bridge inspection

Abstract

The present invention relates to the technical field related to ultrasonic flaw detectors, and discloses an ultrasonic flaw detector for bridge detection, including a radar positioning device for positioning and detection installed above the unmanned trolley body, and a flaw detection component for flaw detection of the bridge fixedly installed below the unmanned trolley body. The flaw detection component includes a chassis mounting frame, and a cleaning component, a roller component, an ultrasonic detection component, and a driving component are sequentially installed on the bottom of the chassis mounting frame from front to back; the present invention can directly contact the outer shell of the roller of the coupling liquid roller with the bridge surface, and an inner cylinder for storing the coupling liquid is provided inside. The coupling liquid discharge component uses pressure to control the discharge of the liquid, and cooperates with the push pipe to release the pressure and discharge the coupling liquid, so that the coupling liquid can evenly cover the bridge surface, effectively reducing the air interference during ultrasonic detection and improving the accuracy and reliability of flaw detection.

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 detection. Background Art

[0002] Based on the propagation characteristics of ultrasonic waves, when ultrasonic waves propagate in bridge structural materials, phenomena such as reflection, refraction, and scattering will occur when encountering interfaces of different media (such as defects, cracks, etc.). The flaw detector emits ultrasonic pulses, and by receiving the reflected ultrasonic signals and analyzing the characteristics of the signals such as time and amplitude, it is possible to determine whether there are defects inside the bridge and information such as the location, size, and shape of the defects. However, the ultrasonic flaw detectors in the prior art have the following defects:

[0003] In the prior art, a bridge handheld ultrasonic flaw detector requires the detector to hold the device and perform point-by-point and section-by-section detection. For large bridges with large areas and long distances as the detection objects, the detection speed will be very slow, making it difficult to meet the requirements of rapid detection. Especially when facing emergency detection tasks or when a large amount of detection work needs to be completed in a short time, the problem of low efficiency will be more prominent;

[0004] In the prior art, when using a bridge ultrasonic flaw detector, it is necessary to manually apply a coupling liquid to the detection surface to achieve accurate detection results. However, manually applying the coupling liquid requires the detector to hold a tool and apply it to each detection point or detection area one by one. Especially for large bridge structures with a large detection area and a wide range to be applied, this will consume a large amount of time and manpower;

[0005] In the prior art, the roller for applying the coupling liquid of the ultrasonic flaw detector usually uses a hard roller for application. When the hard roller is applying, it is difficult to cover all positions. Some bridges have arc-shaped structures, such as arch ribs, circular bridge piers, etc. When the hard roller is applying on these arc-shaped surfaces, due to its linear rolling characteristics, it is difficult to fully adapt to the curvature changes of the arc, and the situation of uneven application of the coupling liquid will occur. Too much or too little may be applied at positions such as the arc top and arc bottom, affecting the propagation and detection effect of ultrasonic waves.

[0006] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and an ultrasonic flaw detector for bridge detection is provided in order to achieve a more practical and valuable purpose. Summary of the Invention

[0007] The present invention provides an ultrasonic flaw detector for bridge detection to overcome the above-mentioned defects in the prior art.

[0008] The purpose and efficacy of an ultrasonic flaw detector for bridge detection according to the present invention are achieved by the following specific technical means:

[0009] An ultrasonic flaw detector for bridge detection, comprising an unmanned trolley body, a radar positioning device for positioning and detection is installed above the unmanned trolley body, and a flaw detection component for detecting the bridge is fixedly installed below the unmanned trolley body. The flaw detection component includes a chassis mounting frame, and a cleaning component, a roller component, an ultrasonic detection component and a driving component are sequentially installed on the bottom of the chassis mounting frame from front to back;

[0010] The roller component includes an air chamber box and a coupling liquid roller. A micro air pump for inflating and replenishing the coupling liquid roller is also installed inside the air chamber box. The coupling liquid roller includes a roller outer shell which is in direct contact with the bridge surface. An inner cylinder for storing coupling liquid is also installed inside the roller outer shell, and a coupling liquid discharge component for controlling the discharge of liquid by pressure is also installed inside the inner cylinder;

[0011] A push pipe for relieving pressure and discharging the coupling liquid is also connected between the roller outer shell and the inner cylinder. One end of the push pipe is connected to the roller outer shell, and the other end of the push pipe is connected to the coupling liquid discharge component.

[0012] In a further technical solution, an outer partition is also fixedly installed between the roller outer shell and the inner cylinder. The outer partition divides the interior of the roller outer shell into an outer air chamber layer and an air chamber layer. The air chamber layer is close to the inner cylinder side, and the outer air chamber layer is close to the inner side of the roller outer shell. The outer air chamber layer is used for storing solution or spraying liquid, and the air chamber layer is used for storing gas to enable the coupling liquid roller to reach an inflated state and roll on the measurement surface.

[0013] In a further technical solution, side chutes are fixedly installed on the inner walls on both sides of the inner cylinder. Limit blocks are installed in the side chutes. Extrusion components are installed on the upper and lower sides of the limit blocks. The extrusion components include extrusion push plates. Extrusion springs are fixedly installed between the two ends of the extrusion push plates and the limit blocks. An intermediate partition is fixedly installed between the limit blocks on both sides. The intermediate partition divides the interior of the extrusion push plate into two solution chambers, and the solution chambers are used for storing coupling liquid.

[0014] Further technical solution: A cavity is provided inside the air chamber box, and a micro air pump is installed inside the cavity. The remaining part of the cavity of the air chamber box is a liquid chamber. A left mounting base and a right mounting base are fixedly installed below the air chamber box. The left mounting base is arranged on the left side of the right mounting base, and the right mounting base is arranged on one side of the micro air pump. A coupling liquid roller is rotatably provided on the left mounting base and the right mounting base. A liquid pipe is connected between the coupling liquid roller and the liquid chamber of the air chamber box. A one-way liquid flow valve is installed at the connection of one end of the liquid pipe and the air chamber box. The other end of the liquid pipe is communicated with the inside of the solution chamber. A trachea penetrates through the inside of the right mounting base, one end of the trachea is connected to the micro air pump, and the other end of the trachea is communicated with the inside of the air chamber layer and the outer air chamber layer.

[0015] Further technical solution: A number of nozzles are arrayed on the outer side of the outer shell of the roller. The push pipes are inserted into the nozzles. The push pipe includes a pipe body. A plug is provided at the upper end of the pipe body. A plurality of liquid discharge ports are provided below the plug. The liquid discharge ports are communicated with the inside of the pipe body. A one-way valve is also provided between the liquid discharge ports and the pipe body. The lower end of the pipe body is communicated with the inside of the solution chamber. A connection pressure plate is fixedly installed on the plurality of push pipes arranged in an array. The connection pressure plate is movably installed on the push pipe. A stop block is provided on the outer side of the push pipe, and the stop block limits the connection pressure plate.

[0016] Further technical solution: The ultrasonic detection component includes two sets of telescopic motors. The ultrasonic detection probe is fixedly connected to the front ends of the two sets of telescopic motors. A scraping plate assembly is also fixedly installed on one side of the ultrasonic detection probe close to the coupling liquid roller. The scraping plate assembly includes a scraping plate box body. A front scraping head is provided at the open end of the scraping plate box body. The front scraping head contacts the surface of the outer shell of the roller. A primary filter plate and a secondary filter plate are provided inside the scraping plate box body. The primary filter plate is arranged above the secondary filter plate. A wiping plate is provided on one side of the scraping plate box body close to the bridge contact surface.

[0017] Further technical solution: The outer contact surface of the outer shell of the roller is made of absorbent cotton material, and a number of the nozzles provided on the surface of the outer shell of the roller are arranged in a plum blossom shape.

[0018] Further technical solution: The drive component includes a drive housing. Two sets of drive motors are arranged oppositely inside the drive housing. The output end of the drive motor is connected with a crawler assembly, and the crawler assembly and the drive motor provide power output for this equipment.

[0019] Further technical solution: The cleaning component includes two sets of rotating motors symmetrically installed, and the output end of the rotating motor is fixedly connected with a brush, and the brush contacts the bridge detection surface.

[0020] Further technical solution: On one surface of the unmanned trolley body, there is a light display component and a camera component. The camera component is arranged on the right side of the light display component, and a control panel component is installed above the camera component and the light display component.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] An ultrasonic flaw detector for bridge detection of the present invention is provided with a coupling liquid drum. The outer shell of the drum of the coupling liquid drum is in direct contact with the bridge surface, and an inner cylinder for storing the coupling liquid is arranged inside. The coupling liquid discharge component controls the discharge of the liquid by pressure, and cooperates with the push tube to relieve pressure and discharge the coupling liquid, so that the coupling liquid can evenly cover the bridge surface, effectively reducing the air interference during ultrasonic detection, improving the accuracy and reliability of flaw detection. The outer air cavity layer is used to store the solution or spray liquid, and can cooperate with the nozzle to realize the release of the solution or spray liquid according to the actual detection requirements, such as performing auxiliary operations such as cleaning and marking during the detection process, improving the convenience and efficiency of detection.

[0023] An ultrasonic flaw detector for bridge detection 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 to make the coupling liquid drum reach an inflated state. This inflated state can make the coupling liquid drum better roll with the bridge measurement surface. When the flaw detector works, the coupling liquid drum can move smoothly along the bridge surface, facilitating the detection of different positions, improving the detection efficiency and coverage. The outer air cavity layer is used to store the 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 the nozzle according to needs.

[0024] An ultrasonic flaw detector for bridge detection of the present invention is provided with a liquid scraping plate component. During the ultrasonic detection process, the coupling liquid drum will smear the coupling liquid on the bridge surface to ensure that the ultrasonic wave can effectively penetrate into the bridge structure. However, too much coupling liquid may interfere with the propagation path of the ultrasonic wave, resulting in errors in the detection results. The front scraping head in the liquid scraping plate component contacts the surface of the outer shell of the drum. During the movement of the flaw detector, it can timely scrape off the excess coupling liquid on the surface of the outer shell of the drum, preventing the excess coupling liquid from dripping onto the detection area, thereby ensuring that the ultrasonic detection probe receives accurate signals, improving the detection accuracy. And the liquid scraping plate box body can collect the scraped coupling liquid, avoiding the waste and environmental pollution caused by the random dripping of the coupling liquid. By recycling the coupling liquid, the detection cost can be reduced and the resource utilization rate can be improved. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Figure 1 Schematic diagram of the overall external structure of the present invention;

[0028] Figure 2 Schematic diagram of the overall top view structure of the present invention;

[0029] Figure 3 Schematic diagram of the overall side view structure of the present invention;

[0030] Figure 4 Schematic diagram of the overall front view structure of the present invention;

[0031] Figure 5 Schematic diagram of the overall structure of the flaw detection component and the crawler component in the present invention;

[0032] Figure 6 Schematic diagram of the overall front cross-section of the flaw detection component and the crawler component in the present invention;

[0033] Figure 7 Stereogram of the cleaning component, the roller component and the ultrasonic detection component in the present invention;

[0034] Figure 8 Schematic diagram of the overall front cross-section of the roller component in the present invention;

[0035] Figure 9 For the present invention Figure 8 Partial enlarged structure diagram of the coupling liquid roller in;

[0036] Figure 10 Schematic diagram of the side cross-section of the flaw detection component in the present invention;

[0037] Figure 11 For the present invention Figure 10 Enlarged structure diagram at position B in;

[0038] Figure 12 For the present invention Figure 10 Enlarged structure diagram of the outer shell of the roller in;

[0039] Figure 13 For the present invention Figure 9 Enlarged structure diagram at position A in.

[0040] Description of the reference numerals:

[0041] Unmanned vehicle body 11, radar positioning device 12, flaw detection and inspection component 13, crawler assembly 14, camera assembly 15, lighting display component 16, control panel component 17, chassis mounting bracket 18, cleaning component 19, roller assembly 20, micro air pump 21, ultrasonic detection component 22, drive component 23, drive motor 24, ultrasonic detection probe 25, liquid scraping plate assembly 26, coupling liquid roller 27, air chamber box 28, outer shell of the roller 30, air chamber layer 31, outer air chamber layer 32, spray head 33, connecting pressure plate 34, outer partition 35, push tube 36, inner cylinder 38, side chute 39, extrusion push plate 40, intermediate partition 41, extrusion spring 42, limit block 43, solution chamber 44, liquid pipe 45, one-way liquid flow valve 46, pipe body 47, air pipe 48, right end mounting base 49, left end mounting base 50, liquid scraping plate box body 51, front scraping head 52, primary filter plate 53, secondary filter plate 54, wiping plate 55, plug 56, liquid discharge port 57, one-way valve 58, rotary motor 59, brush 60, telescopic motor 61. Detailed implementation manners

[0042] The following further describes in detail the implementation manners of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0043] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 to 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.

[0044] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "coupled" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] As shown in Figure 1 to Figure 13 the attached drawings:

[0046] The present invention provides an ultrasonic flaw detector for bridge detection, including an unmanned trolley body 11. Above the unmanned trolley body 11, a radar positioning device 12 for positioning and detection is installed. Below the unmanned trolley body 11, a flaw detection component 13 for flaw detection of the bridge is fixedly installed. The flaw detection component 13 includes a chassis mounting frame 18. At the bottom of the chassis mounting frame 18, a cleaning component 19, a roller component 20, an ultrasonic detection component 22, and a driving component 23 are installed in sequence from front to back;

[0047] The roller component 20 includes an air chamber box 28 and a coupling liquid roller 27. Inside the air chamber box 28, a micro air pump 21 for inflating and replenishing the coupling liquid roller 27 is also installed. The coupling liquid roller 27 includes a roller outer shell 30, which is in direct contact with the bridge surface. Inside the roller outer shell 30, an inner cylinder 38 for storing coupling liquid is also installed. Inside the inner cylinder 38, a coupling liquid discharge component for controlling the discharge of liquid by pressure is also installed;

[0048] A push pipe 36 for relieving pressure and discharging coupling liquid is also connected between the roller outer shell 30 and the inner cylinder 38. One end of the push pipe 36 is connected to the roller outer shell 30, and the other end of the push pipe 36 is connected to the coupling liquid discharge component.

[0049] Preferably, referring to the appendix Figure 9 , an outer partition 35 is also fixedly installed between the roller outer shell 30 and the inner cylinder 38. The outer partition 35 divides the interior of the roller outer shell 30 into an outer air chamber layer 32 and an air chamber layer 31. The air chamber layer 31 is close to the inner cylinder 38, and the outer air chamber layer 32 is close to the inner side of the roller outer shell 30. The outer air chamber layer 32 is used to store solution or spray liquid, and the air chamber layer 31 is used to store gas, so that the coupling liquid roller 27 can reach an inflated state and roll with the measurement surface. The air chamber layer 31 is close to the inner cylinder 38, and its main function is to store gas. When gas is filled into the air chamber layer 31, the coupling liquid roller 27 reaches an inflated state, and the structure of the whole roller has certain elasticity and supporting force, so that the roller can roll stably with the measurement surface. During the rolling process, the buffering and supporting effects provided by the gas in the air chamber layer 31 ensure good contact between the roller and the measurement surface, ensure the accuracy of measurement, and at the same time reduce the wear between the roller and the measurement surface and extend the service life of the roller.

[0050] Preferably, referring to the appendix Figure 9, on both inner walls of the inner cylinder 38, side chutes 39 are fixedly installed. In the side chutes 39, limit blocks 43 are installed. On the upper and lower sides of the limit blocks 43, extrusion components are installed. The extrusion components include extrusion push plates 40. Between the two ends of the extrusion push plates 40 and the limit blocks 43, extrusion springs 42 are fixedly installed. Between the two limit blocks 43 provided on both sides, an intermediate partition 41 is fixedly installed. The intermediate partition 41 divides the interior of the extrusion push plate 40 into two solution chambers 44. The solution chambers 44 are used to store coupling liquid. The extrusion spring 42, as a key part of the extrusion component, can effectively buffer the impact force when the drum contacts the measurement surface. When the drum is subjected to a large external force, the extrusion spring will undergo elastic deformation, absorb and disperse the energy, prevent excessive pressure from directly acting on the inner cylinder 38 and other internal structures, reduce the risk of structural damage, and extend the service life of the drum.

[0051] Preferably, referring to the appendix Figure 8 , inside the air chamber box 28, there is a cavity. Inside the cavity, a micro air pump 21 is installed. The rest of the cavity of the air chamber box 28 is a liquid chamber. Below the air chamber box 28, a left end mounting base 50 and a right end mounting base 49 are fixedly installed. The left end mounting base 50 is arranged on the left side of the right end mounting base 49. The right end mounting base 49 is arranged on one side of the micro air pump 21. On the left end mounting base 50 and the right end mounting base 49, the coupling liquid drum 27 is rotatably provided. Between the coupling liquid drum 27 and the liquid chamber of the air chamber box 28, a liquid pipe 45 is connected. At the connection of one end of the liquid pipe 45 and the air chamber box 28, a one-way liquid flow valve 46 is installed. The other end of the liquid pipe 45 communicates with the interior of the solution chamber 44. Inside the right end mounting base 49, an air pipe 48 penetrates through. One end of the air pipe 48 is connected to the micro air pump 21, and the other end of the air pipe 48 communicates with the interior of the air chamber layer 31 and the outer air chamber layer 32. The micro air pump 21 inside the air chamber box 28 is the core component for 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 transports the compressed gas into the interior of the air chamber layer 31 and the outer air chamber layer 32 of the coupling liquid drum 27. For the air chamber layer 31, the filling of gas makes the coupling liquid drum 27 reach an inflated state, enabling the drum to have a certain elasticity and support force, being able to stably contact the measurement surface and roll smoothly, ensuring the smooth progress of the measurement work. For the outer air chamber layer 32, the entry of gas can assist in the spraying operation of the stored solution or spraying liquid. For example, when it is necessary to clean, lubricate or chemically treat the measurement surface, the gas pressure pushes the liquid to spray out from a specific spraying port to achieve the corresponding functions.

[0052] Preferably, referring to the appendix Figure 9 and the appendix Figure 12, a number of spray heads 33 are arrayed on the outer side of the outer shell 30 of the drum. The push tubes 36 are inserted into the interiors of the number of spray heads 33. The push tube 36 includes a tube body 47. A plug 56 is provided at the upper end of the tube body 47. A plurality of liquid discharge ports 57 are provided below the plug 56. The liquid discharge ports 57 communicate with the interior of the tube body 47. A one-way valve 58 is further provided between the liquid discharge ports 57 and the tube body 47. The lower end of the tube body 47 communicates with the interior of the solution chamber 44. A connection pressure plate 34 is fixedly installed on the number of push tubes 36 arrayed. The connection pressure plate 34 is movably installed on the push tube 36. A stopper is provided outside the push tube 36. The stopper limits the connection pressure plate 34. The pressure is transmitted to the push tube 36 through the connection pressure plate 34, so that the liquid in the solution chamber 44 is uniformly sprayed onto the measurement surface through the liquid discharge ports 57 and the spray heads 33 of the push tube 36 under the action of pressure. This design can automatically control the liquid spraying according to the contact situation between the drum and the measurement surface, ensure the continuous supply and uniform coverage of the liquid during the measurement process, and thus improve the accuracy and efficiency of the measurement.

[0053] Preferably, referring to the appendix Figure 10 , the ultrasonic detection assembly 22 includes two sets of telescopic motors 61. The ultrasonic detection probes 25 are fixedly connected to the front ends of the two sets of telescopic motors 61. A liquid scraping plate assembly 26 is further fixedly installed on one side of the ultrasonic detection probe 25 close to the coupling liquid drum 27. The liquid scraping plate assembly 26 includes a liquid scraping plate box body 51. A front scraping head 52 is provided at the open end of the liquid scraping plate box body 51. The front scraping 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 liquid scraping plate box body 51. The primary filter plate 53 is arranged above the secondary filter plate 54. A wiping plate 55 is provided on one side of the liquid scraping plate box body 51 close to the bridge contact surface. The front scraping head 52 contacts the surface of the outer shell 30 of the drum. During the rolling of the drum, the front scraping head 52 can scrape off the 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 measurement object, ensure the accurate propagation of ultrasonic signals, improve the reliability of detection, and the primary filter plate 53 is arranged above the secondary filter plate 54. They filter the liquid and impurities scraped off by the front scraping head 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.

[0054] Preferably, referring to the appendix Figure 9 , the outer contact surface of the outer shell 30 of the drum is made of absorbent cotton material. The number of spray heads 33 provided on the surface of the outer shell 30 of the drum are arranged in a plum blossom shape.

[0055] Preferably, referring to the appendix Figure 6 , the driving assembly 23 includes a driving housing, and two groups of driving motors 24 are arranged oppositely inside the driving housing. An output end of the driving motor 24 is connected with a crawler assembly 14, and the crawler assembly 14 and the driving motor 24 provide power output for this equipment.

[0056] Preferably, referring to the appendix Figure 6 , the cleaning assembly 19 includes two groups of rotating motors 59 symmetrically installed. An output end of the rotating motor 59 is fixedly connected with a brush 60, and the brush 60 contacts the bridge detection surface.

[0057] Preferably, referring to the appendix Figure 1 , a lighting display assembly 16 and a camera assembly 15 are arranged on one surface of the unmanned vehicle body 11. The camera assembly 15 is arranged on the right side of the lighting display assembly 16, and a control panel assembly 17 is installed above the camera assembly 15 and the lighting display assembly 16.

[0058] Specific usage method of the present invention:

[0059] When using the present invention, first place the present invention flat on the bridge detection surface, and then this equipment can be started. When this equipment is started, the radar positioning device 12 will provide positioning services to accurately position the detection route. Subsequently, the control panel assembly 17 will set the bridge thickness and set the scanning program. Then, the lighting display assembly 16 will provide operation display for the equipment, and the camera assembly 15 will provide visual positioning services for the equipment to achieve more accurate positioning and flaw detection.

[0060] Subsequently, when the equipment is running, the driving motor 24 arranged inside the flaw detection component 13 will provide running power for the crawler assembly 14 to achieve the moving effect of the whole equipment. Then, when the equipment is running forward, the cleaning assembly 19 arranged at the bottom of the flaw detection component 13 will clean the bridge deck. The two cleaning assemblies 19 will run in opposite directions during operation to sweep the dust in the middle to the outside. Subsequently, after the cleaning is completed, the coupling liquid roller 27 will roll and apply the coupling liquid to the ground.

[0061] When the coupling liquid roller 27 is in operation, the micro air pump 21 arranged inside the air chamber box 28 will simultaneously transport gas into the coupling liquid roller 27, and partially fill its air chamber layer 31 and the outer air chamber layer 32 with gas. Subsequently, when the outer shell 30 of the roller contacts the ground, it will be subjected to a squeezing 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 chamber 44 and discharge it through the pressure relief valve at the connection part of the push tube 36 and the solution chamber 44. The discharged liquid will enter the inner part of the outer air chamber layer 32 through the tube body of the push tube 36. And when the push tube 36 undergoes a downward displacement, the push tube 36 will synchronously drive the connecting pressure plate 34 to move downward. Subsequently, after moving downward, the plug 56 arranged on a part of the push tube 36 will move downward, and when the plug 56 moves downward, it will be separated from the spray head 33, and the high-pressure gas inside the outer air chamber layer 32 will be ejected outward. The sprayed coupling liquid will cover the bridge detection surface. After the covering is completed, under the movement of the crawler assembly 14, the coupling liquid roller 27 will roll, and the coupling liquid will be initially smeared. And when the coupling liquid roller 27 rolls and adsorbs the dust on the bridge detection surface, after the adsorption is completed, the front scraper 52 of the liquid scraping plate assembly 26 will contact the surface of the outer shell 30 of the roller to form a scraper. The scraped dust and the coupling liquid mixture will be scraped by the front scraper 52, and after scraping, the coupling liquid mixture will enter the liquid scraping plate box body 51. Subsequently, the mixture will be initially filtered through the primary filter plate 53, and after the initial filtration, it will enter the secondary filter plate 54. Then, the secondary filter plate 54 will filter again. The filtered coupling liquid will accumulate above the wiping plate 55, and the accumulated coupling liquid will be adsorbed by the wiping plate 55. After the adsorption is completed, the wiping plate 55 will re-smear the bridge detection surface through its own humidity. After the smearing is completed, the telescopic motor 61 arranged on the ultrasonic detection assembly 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 conduct real-time detection, and after the detection is completed, it will be uploaded to the system background in real time, and the system background will evaluate the detection results.

[0062] And when the coupling liquid roller 27 is in operation, the air chamber layer 31 and the outer air chamber layer 32 arranged on the coupling liquid roller 27 are gas-filled parts. When the outer shell 30 of the roller contacts the uneven surface of the bridge deck, the outer shell 30 of the roller can apply different squeezing forces through the extrusion push plate 40 to achieve additional spraying of the coupling liquid on the bridge detection surface, and achieve adaptive smearing of the coupling liquid on the bridge detection surface through the contact points of each push tube 36.

[0063] Embodiments of the present invention are given by way of example and description, and are not exhaustive or limit the invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

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 roller assembly (20) comprises an air cavity box (28) and a coupling liquid roller (27); a micro air pump (21) for inflating and replenishing the coupling liquid roller (27) is installed inside the air cavity box (28); the coupling liquid roller (27) comprises an outer roller shell (30); the outer roller shell (30) is in direct contact with the bridge surface; an inner roller body (38) for storing coupling liquid is installed inside the outer roller shell (30); a coupling liquid discharge assembly for controlling the discharge of liquid by pressure is also installed inside the inner roller 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; An outer layer partition (35) is fixedly installed between the outer layer shell (30) of the drum and the inner layer shell (38), and the outer layer partition (35) divides the interior of the outer layer shell (30) of the drum 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 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, and enables the coupling liquid drum (27) to reach an inflated state so as to be able to roll with the measuring surface; 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.

2. The ultrasonic flaw detector for bridge inspection according to claim 1, 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).

3. The ultrasonic flaw detector for bridge inspection according to claim 2 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).

4. The ultrasonic flaw detector for bridge inspection according to claim 3 is 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.

5. The ultrasonic flaw detector for bridge inspection according to claim 4 is 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.

6. 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.

7. 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.

8. 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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