Concrete bridge bottom surface crack detection device

Abstract

The invention belongs to the technical field of bridge detection, and discloses a concrete bridge bottom surface crack detection device, comprising: a bottom plate, the middle of the top of which is designed to be recessed; the two sets of mounting columns are fixedly mounted on one side of the top of the bottom plate correspondingly, and limiting top plates are fixedly mounted at the tops of the two mounting columns correspondingly; the handrail is fixedly mounted at the sunken part of the top of the bottom plate; the moving block is slidably mounted on the outer walls of the two mounting columns, and a motion detection mechanism is arranged to drive the moving block to reciprocate in the vertical direction along the axes of the mounting columns; due to the movement, the detector periodically moves along with the lifting rod, and the distance between the detector and the bridge ground continuously changes to form periodic separation; the negative pressure air flow generated at the separation moment can effectively absorb the residual dust of the detection head, so that the interference of the dust on the detection result is avoided; meanwhile, the detector detects the bottom surface of the bridge from different angles and distances.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bridge detection, and specifically relates to a concrete bridge bottom surface crack detection device. BACKGROUND

[0002] Among the structural damages of concrete bridges, cracks are often the main culprit. Under the combined influence of the use load during operation and physical and chemical factors such as temperature changes and chemical erosion, cracks on the bridge will continue to breed and develop in depth, forming through cracks that penetrate the entire structural section and deep cracks with large depths. Once these cracks are formed, the integrity of the bridge structure will be directly weakened, and when the cracks develop to a serious degree, they may even cause catastrophic accidents such as bridge collapse, which seriously affects the normal and safe use of the bridge structure. Therefore, carrying out detection work on bridge cracks has become an indispensable key link in the bridge maintenance process.

[0003] For example, the patent with the publication number CN214467235U discloses a concrete bridge bottom surface crack detection device, which comprises a base, an air cylinder and a detector. The lower end of the base is provided with a friction block, and the outer surface of the base is provided with a mounting block. The upper end of the base is provided with an air cylinder, and the end of the air cylinder is connected with a support plate. The lower end of the support plate is provided with a guide block, and the guide block is connected with a guide groove, which is arranged in the base. The upper end of the support plate is provided with a spring, and the end of the spring is connected with a folding lever. The lower end of the folding lever is provided with a sliding block, and the sliding block is connected with a sliding groove, which is arranged in the support plate. The upper end of the connecting plate is provided with a fixed plate, and the outer surface of the fixed plate is provided with a detector. The concrete bridge bottom surface crack detection device can adjust the distance between the support plate and the mounting plate through the folding lever according to the needs of the user, so as to conveniently adjust the height of the detector according to the needs of the user.

[0004] The above device can adjust the distance between the support plate and the mounting plate through the folding lever, and then adjust the height of the detector. However, the bottom surface of the bridge is complex, and there are joints formed during concrete pouring and uneven conditions in local areas. In this case, the detection device with a fixed height is used for work, which is easy to produce a blind area in the detection process, so that part of the area cannot be effectively detected.

[0005] Therefore, a concrete bridge bottom surface crack detection device is proposed to solve the problems in the background art. SUMMARY

[0006] To solve the problems in the background art, the application provides a concrete bridge bottom surface crack detection device.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a concrete bridge bottom surface crack detection device, comprising: a bottom plate, the top middle part is designed in a concave shape; two groups of mounting columns are fixedly installed on one side of the top of the bottom plate, and the top of each of the two mounting columns is fixedly installed with a limiting top plate; a handrail is fixedly installed in the concave part on the top of the bottom plate; a moving block is slidingly installed on the outer wall of the two mounting columns; A motion detection mechanism is fixedly installed on the outer wall of one side of the moving block; An auxiliary cleaning mechanism is fixedly installed on the outer wall of the handrail and is movably connected with the motion detection mechanism; The motion detection mechanism comprises a driving assembly and a transmission assembly, the transmission assembly comprises a fixed block fixedly installed in the concave part on the top of the bottom plate, the fixed block is designed in an inclined shape, a second rotating rod is rotatably installed on one side of the fixed block, a cam is fixedly sleeved on the outer wall of the second rotating rod, a third rotating rod is rotatably installed on the outer wall of the cam, a third connecting rod is hingedly installed on the outer wall of the third rotating rod, two fourth connecting rods are hingedly installed on the outer walls of the two sides of the third connecting rod, the two fourth connecting rods are hingedly connected with the moving block, two lifting rods are fixedly installed on one side of the moving block, and a detector is fixedly installed on the top of each of the two lifting rods.

[0008] Preferably, a first connecting rod is hingedly installed on the top of one side of the bottom plate, and the first connecting rod is hingedly connected with the two fourth connecting rods and the third connecting rod.

[0009] Preferably, the driving assembly has two groups, which are arranged on the two sides of the top of the bottom plate, and the driving assembly comprises a first rotating rod rotatably arranged on the top of the bottom plate, and a moving wheel is fixedly sleeved on the outer walls of the two ends of the first rotating rod.

[0010] Preferably, the second rotating rod and the outer wall of the adjacent first rotating rod are fixedly sleeved with chain wheels, and the two chain wheels are connected through a chain transmission.

[0011] Preferably, the handrail is designed in a shape of a Chinese character and the opening faces downward, and an anti-skid rubber strip is fixedly sleeved on the top outer wall of the cam.

[0012] Preferably, the auxiliary cleaning mechanism comprises a cleaning assembly and an auxiliary assembly, the cleaning assembly is fixedly installed on the outer wall of the handrail, and the auxiliary assembly is fixedly installed on the outer wall of the moving block.

[0013] Preferably, the cleaning assembly comprises two inclined rods fixedly installed on the outer wall of the handrail, a rectangular box is fixedly installed on the top of each of the two inclined rods, and a rectangular installation groove is formed in the top of the rectangular box.

[0014] Preferably, a cleaning plate is slidingly mounted on the outer wall of the rectangular box, and the top of the cleaning plate is designed in a triangular shape.

[0015] Preferably, the rectangular mounting groove at the top of the rectangular box is elastically connected with the cleaning plate through a plurality of spring telescopic rod assemblies, and the spring telescopic rod assemblies are distributed at equal distances.

[0016] Preferably, the auxiliary assembly comprises a top rod fixedly mounted on the outer wall of the moving block away from the lifting rod, and a rubber ball is fixedly mounted at the top end of the top rod.

[0017] Compared with the prior art, the present application has the following beneficial effects: By setting the motion detection mechanism, the device is moved to the bottom of the bridge, and the detection instrument is turned on, then the worker pushes the supporting rod to move the device; in this process, through the synergistic action of a series of transmission components such as the moving wheel, the first rotating rod, the chain, the second rotating rod and the cam, the moving block is driven to move vertically along the axis of the mounting column; this movement makes the detection instrument move periodically with the lifting rod, and the distance between the detection instrument and the ground of the bridge changes constantly, forming a periodic separation; the negative pressure airflow generated at the moment of separation can effectively remove the dust remaining on the detection head, avoiding the interference of dust on the detection result; at the same time, the detection instrument detects the bridge bottom surface from different angles and distances, and this multi-angle and multi-distance detection method can fully cover the bridge bottom surface, effectively avoiding the detection blind area, greatly improving the accuracy and reliability of crack detection, and providing more accurate data support for the safety evaluation of the bridge.

[0018] By setting the auxiliary cleaning mechanism, when the worker pushes the supporting rod to move the device, the inclined rod drives the rectangular box and the cleaning plate to move together; since the rectangular box and the cleaning plate are elastically connected, the cleaning plate can closely adhere to the ground of the bridge, effectively scraping and cleaning the dust and sundries on the ground, and creating a relatively clean working environment for the detection instrument; in addition, when the moving block moves up and down, the top rod and the rubber ball move together, the rubber ball constantly knocks the bottom of the rectangular box, shakes and shakes off the dust and impurities attached to the outer wall of the cleaning plate, achieving self-cleaning of the cleaning plate; this design does not need manual frequent cleaning of the cleaning plate, which improves the cleaning efficiency and ensures the persistence of the cleaning effect, ensuring that the entire detection device always maintains a good working state during a long working process. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the side structure of the present application; Figure 3 It is a schematic diagram of the local structure of the present application; Figure 4 It is a schematic diagram of the local structure of the present application; Figure 3 Amplification structure schematic diagram of middle A; Figure 5 Structure schematic diagram of auxiliary assembly of the present application; Figure 6 Structure schematic diagram of driving assembly of the present application; Figure 7 Explosion structure schematic diagram of connecting rod three and connecting rod one and connecting rod four.

[0020] In the figure: 1, bottom plate; 11, mounting column; 111, limiting top plate; 12, support rod; 121, inclined rod; 1211, rectangular box; 1212, cleaning plate; 1213, spring telescopic rod assembly; 13, rotating rod one; 131, moving wheel; 14, connecting rod one; 2, fixed block; 21, rotating rod two; 22, cam; 221, rotating rod three; 2211, connecting rod three; 23, chain; 3, moving block; 31, connecting rod four; 32, top rod; 321, rubber ball; 33, lifting rod; 331, detector. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0022] As Figures 1 to 7 shown, the present application provides a concrete bridge bottom surface crack detection device, which comprises a bottom plate 1, the top middle part of which is designed in a concave shape; two groups of mounting columns 11 are fixedly installed on one side of the top of the bottom plate 1, and the top of each of the two mounting columns 11 is fixedly installed with a limiting top plate 111; a support rod 12 is fixedly installed in the concave part on the top of the bottom plate 1; a moving block 3 is slidingly installed on the outer wall of the two mounting columns 11; A motion detection mechanism is fixedly installed on the outer wall of one side of the moving block 3. The auxiliary cleaning mechanism is fixedly installed on the outer wall of the handrail 12 and is movably connected with the motion detection mechanism. The motion detection mechanism comprises a driving assembly and a transmission assembly. The transmission assembly comprises a fixed block 2 fixedly installed in the recess on the top of the bottom plate 1. The fixed block 2 is designed in an inclined shape. A rotating rod 2 is rotatably installed on one side of the fixed block 2. A cam 22 is fixedly sleeved on the outer wall of the rotating rod 2. A rotating rod 3 221 is rotatably installed on the outer wall of the cam 22. A connecting rod 3 2211 is hingedly installed on the outer wall of the rotating rod 3 221. Two connecting rods 4 31 are hingedly installed on the outer walls of the two sides of the connecting rod 3 2211, respectively. The two connecting rods 4 31 are hingedly connected with a moving block 3. Two lifting rods 33 are fixedly installed on one side of the moving block 3. Two detectors 331 are fixedly installed on the top of the two lifting rods 33, respectively. A connecting rod 1 14 is hingedly installed on the top of one side of the bottom plate 1. The connecting rod 1 14 is hingedly connected with the two connecting rods 4 31 and the connecting rod 3 2211, respectively. The driving assembly comprises two groups. The two groups are arranged on the top of the two sides of the bottom plate 1, respectively. The driving assembly comprises a rotating rod 1 13 rotatably arranged on the top of the bottom plate 1. Two moving wheels 131 are fixedly sleeved on the outer walls of the two ends of the rotating rod 1 13, respectively. Chain wheels are fixedly sleeved on the outer walls of the rotating rod 2 and the adjacent rotating rod 1 13, respectively. The two chain wheels are drivingly connected through a chain 23. The handrail 12 is designed in a shape of and the opening faces downward. An anti-skid rubber strip is fixedly sleeved on the top outer wall of the cam 22.

[0023] By means of the above scheme, the high-efficiency and accurate detection of the cracks on the bottom surface of the concrete bridge is realized through the ingenious cooperation of the motion detection mechanism and the auxiliary cleaning mechanism and the unique design of the components. Meanwhile, the detection environment is kept clean during the detection process. The reliability and accuracy of the detection are improved. As to the driving assembly, two groups are arranged on the top of the two sides of the bottom plate 1, respectively. Each group comprises a rotating rod 1 13 rotatably arranged on the top of the bottom plate 1. The moving wheels 131 are fixedly sleeved on the outer walls of the two ends of the rotating rod 1 13. When the staff member pushes the handrail 12 to drive the device to move, the moving wheels 131 roll in contact with the bottom surface, thereby driving the rotating rod 1 13 to rotate. The movement power of the device is utilized. It is not necessary to additionally arrange a power source to drive the detectors 331 to move. The device structure is simplified. The energy consumption and cost are reduced. Meanwhile, the arrangement of the two groups of driving assemblies ensures the stability of the movement of the device. The detectors 331 can work in a stable environment. The detection errors caused by the shaking of the device are reduced. In the transmission assembly, the inclined fixed block 2 fixedly mounted in the depression on the top of the bottom plate 1 provides a stable support base for the entire transmission structure; the rotating rod 21 rotatably mounted on one side of the fixed block 2 is connected to the nearby rotating rod 13 through the chain 23; when the rotating rod 13 rotates, the rotating rod 21 is driven to rotate through the transmission action of the sprocket and the chain 23; the cam 22 fixedly mounted on the outer wall of the rotating rod 21 rotates accordingly, and the rotating rod 3 221 on the outer wall of the cam 22 also makes a circular motion; the outer wall of the rotating rod 3 221 The connecting rod 3 2211, which is hingedly mounted on the wall, swings back and forth driven by the rotating rod 3 221. The two connecting rods 4 31, which are hingedly mounted on the outer walls on both sides of the connecting rod 3 2211, convert the swinging motion of the connecting rod 3 2211 into linear motion, thereby driving the moving block 3, which is hingedly connected to the connecting rod 4 31, to reciprocate vertically on the outer walls of the two mounting columns 11. This transmission method is cleverly designed and can convert rotational motion into linear reciprocating motion. The transmission process is stable and reliable, ensuring the accuracy of the movement of the moving block 3. The two lifting rods 33 fixedly installed on one side of the moving block 3 move synchronously with the reciprocating motion of the moving block 3, thereby driving the detector 331 fixedly installed on the top of the two lifting rods 33 to perform periodic activities; the distance between the detector 331 and the bottom surface of the bridge is constantly changing, so that it is periodically separated from the bottom surface of the bridge. The negative pressure airflow is generated at the moment of separation, which can effectively absorb the dust remaining on the detection head and prevent the dust from interfering with the detection results; at the same time, during the periodic separation process, the detector 331 can detect the bottom surface of the bridge from different angles and distances. This multi-angle and multi-distance detection method can fully cover the bottom surface of the bridge, effectively avoid the occurrence of blind spots in detection, and greatly improve the accuracy and reliability of crack detection; The connecting rod 14 hingedly mounted on the top of one side of the base plate 1 is hingedly connected to the two connecting rods 4 31 and the connecting rod 3 2211, respectively, playing the role of connecting and stabilizing the transmission, making the entire transmission process smoother and reducing the detection error caused by loose or shaking transmission components; the anti-slip rubber strip fixedly mounted on the top outer wall of the cam 22 increases the friction between the cam 22 and other transmission components, preventing slipping during the transmission process, and further ensuring the stability and reliability of the transmission; The auxiliary cleaning mechanism is fixedly installed on the outer wall of the handrail 12 and movably connected with the motion detection mechanism; during the movement of the device, the handrail 12 drives the auxiliary cleaning mechanism to move together to clean the bottom surface of the bridge; at the same time, the up-down reciprocating movement of the moving block 3 in the motion detection mechanism drives the related components in the auxiliary cleaning mechanism to move, so that the cleaning and detection are cooperated; this design can clean the dust and sundries on the bottom surface in time during the detection, so as to create a clean working environment for the detector 331 and further improve the detection accuracy; moreover, the auxiliary cleaning mechanism is movably connected with the motion detection mechanism, so that the power of the motion detection mechanism is fully utilized, and a power source is not needed to drive the cleaning components, which simplifies the structure of the device and reduces the energy consumption and cost.

[0024] Please refer to Figures 3 to 5 As shown in the figure, the auxiliary cleaning mechanism comprises a cleaning assembly and an auxiliary assembly, the cleaning assembly is fixedly installed on the outer wall of the handrail 12, and the auxiliary assembly is fixedly installed on the outer wall of the moving block 3; the cleaning assembly comprises two inclined rods 121 fixedly installed on the outer wall of the handrail 12, the top of each of the two inclined rods 121 is fixedly installed with a rectangular box 1211, and the top of the rectangular box 1211 is provided with a rectangular mounting slot; the outer wall of the rectangular box 1211 is slidably installed with a cleaning plate 1212, and the top of the cleaning plate 1212 is designed in a triangular shape; the rectangular mounting slot at the top of the rectangular box 1211 is elastically connected with the cleaning plate 1212 through a plurality of spring telescopic rod combination assemblies 1213, and the plurality of spring telescopic rod combination assemblies 1213 are designed at equal distances; the auxiliary assembly comprises a top rod 32 fixedly installed on the outer wall of the moving block 3 away from the lifting rod 33, and the top end of the top rod 32 is fixedly installed with a rubber ball 321.

[0025] By the cooperation of the cleaning assembly and the auxiliary assembly, the cleaning effect of the bottom surface during the detection of the bottom of the bridge is effectively improved, and the working environment of the detector 331 is further optimized. In terms of the cleaning assembly, two inclined rods 121 are fixedly installed on the outer wall of the handrail 12, providing a stable support basis for the entire cleaning structure; a rectangular box 1211 is fixedly installed at the top of the inclined rod 121, a rectangular mounting slot is formed at the top of the rectangular box 1211, and the cleaning plate 1212 is elastically connected with the rectangular box 1211 through a plurality of spring telescopic rod assemblies 1213 which are designed to be equidistantly distributed; during the movement of the device, the cleaning plate 1212 can always be tightly attached to the bottom surface of the bridge due to the elastic effect of the spring telescopic rod assemblies 1213; the top of the cleaning plate 1212 is designed in a triangular shape, which not only facilitates the scraping of debris on the bottom surface during movement, but also effectively reduces the frictional resistance between the cleaning plate 1212 and the bottom surface of the bridge, making the cleaning process smoother; when the device moves along the bottom of the bridge, the dust and debris on the bottom surface can be cleaned, creating a relatively clean environment for the subsequent work of the detector 331, and avoiding the influence of excessive debris on the bottom surface on the detection accuracy of the detector 331. In terms of the auxiliary assembly, the top rod 32 is fixedly installed on the outer wall of the moving block 3 away from the lifting rod 33, and the rubber ball 321 is fixedly installed at the top end of the top rod 32, which forms a good cooperation with the cleaning assembly; during the up-and-down reciprocating movement of the moving block 3, the top rod 32 and the rubber ball 321 also move together; when the rubber ball 321 moves to a position in contact with the bottom of the rectangular box 1211, it will knock the bottom of the rectangular box 1211; since the cleaning plate 1212 is elastically connected with the rectangular box 1211 through the spring telescopic rod assemblies 1213, the vibration caused by the knocking will be transmitted to the cleaning plate 1212 through the rectangular box 1211, causing the dust and impurities attached to the outer wall of the cleaning plate 1212 to be shaken off; this solves the problem that dust and impurities easily adhere to the surface of the cleaning plate 1212 during a long cleaning process, affecting the cleaning effect; through the regular knocking of the rubber ball 321, the cleaning plate 1212 can always maintain good cleaning performance, thereby continuously and effectively cleaning the bottom surface of the bridge. The cooperative work of the cleaning assembly and the auxiliary assembly enables the bottom of the bridge to be cleaned in real time by the cleaning plate 1212 during the detection process, and the dust and impurities on the cleaning plate 1212 to be timely removed by the knocking action of the rubber ball 321, forming a complete cleaning cycle; this design not only improves the cleaning efficiency, but also ensures that the detector 331 is always in a relatively clean working environment, which helps to improve the detection accuracy and reliability of the detector 331, avoids detection errors caused by excessive debris on the bottom surface or dust on the surface of the cleaning plate 1212, and thus better completes the detection task of the bottom of the bridge.

[0026] Working principle and use process of the present application: First, move the device to the bottom of the bridge to be measured, turn on the detector 331, and the staff will push the handrail 12 to move the bottom plate 1, and the bottom plate 1 will drive the moving wheel 131 and the rotating rod 1 13 to rotate. The transmission of the chain 23 will make the rotating rod 21 also rotate, and the rotating rod 21 will drive the cam 22 to rotate along the outer wall of the cam 22, and the rotating rod 3 221 will be driven by the cam 22 to rotate, and the rotating rod 3 221 will drive the connecting rod 3 2211 to drive the connecting rod 1 14 and the two connecting rods 4 31 to move closer to or away from each other. The connecting rod 4 31 is hinged with the moving block 3, so that the moving The block 3 performs reciprocating motion in the vertical direction along the axis of the two mounting columns 11. The setting of the limit top plate 111 prevents the moving block 3 from excessive movement and separation from the mounting column 11. The up and down reciprocating motion of the moving block 3 first drives the two lifting rods 33 and the detector 331 to perform the same periodic activity. The distance between the detector 331 and the bottom surface of the bridge is constantly changing, so that the detector 331 and the bottom surface of the bridge are periodically separated. Negative pressure airflow is generated at the moment of separation, thereby removing the dust remaining on the detection head. During the periodic separation process, the detector 331 can detect the bottom surface of the bridge from different angles and distances to avoid detection blind spots. At the same time, the fixed connection between the handrail 12 and the oblique rod 121 enables the handrail 12 to drive the rectangular box 1211 and the cleaning plate 1212 to move together through the oblique rod 121 during the movement. The elastic connection between the rectangular box 1211 and the cleaning plate 1212 enables the cleaning plate 1212 to fit the bottom surface of the bridge, thereby scraping and cleaning it. The moving block 3 drives the top rod 32 and the rubber ball 321 to move together during the up and down reciprocating movement. The continuous movement of the rubber ball 321 knocks on the bottom of the rectangular box 1211, and the dust and impurities attached to the outer wall of the cleaning plate 1212 can be shaken off.

[0027] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements that are inherent to such process, method, article, or apparatus.

[0028] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A concrete bridge bottom surface crack detection device, characterized by: Including: A bottom plate (1), with a concave design in the middle of the top; Mounting columns (11), there are two groups respectively fixedly installed on one side of the top of the bottom plate (1), and limiting top plates (111) are fixedly installed on the tops of the two mounting columns (11); A handrail (12), the handrail (12) is fixedly installed at the concave part on the top of the bottom plate (1); A moving block (3), slidably installed on the outer walls of the two mounting columns (11); A motion detection mechanism, fixedly installed on the outer wall of one side of the moving block (3); An auxiliary cleaning mechanism, fixedly installed on the outer wall of the handrail (12) and movably connected with the motion detection mechanism; Among them, the motion detection mechanism includes a driving component and a transmission component. The transmission component includes a fixed block (2) fixedly installed at the concave part on the top of the bottom plate (1). The fixed block (2) is designed to be inclined. A second rotating rod (21) is rotatably installed on one side of the fixed block (2). A cam (22) is fixedly sleeved on the outer wall of the second rotating rod (21). A third rotating rod (221) is rotatably installed on the outer wall of the cam (22). A third connecting rod (2211) is hingedly installed on the outer wall of the third rotating rod (221). Two fourth connecting rods (31) are respectively hingedly installed on the outer walls on both sides of the third connecting rod (2211). Both of the two fourth connecting rods (31) are hinged with the moving block (3). Two lifting rods (33) are fixedly installed on one side of the moving block (3). Detectors (331) are fixedly installed on the tops of the two lifting rods (33).

2. The concrete bridge bottom surface crack detection device according to claim 1, characterized in that: One side of the top of the bottom plate (1) is hingedly installed with a first connecting rod (14), and the first connecting rod (14) is respectively hinged with the two fourth connecting rods (31) and the third connecting rod (2211).

3. The concrete bridge bottom surface crack detection device according to claim 1, characterized in that: There are two groups of the driving components, respectively arranged on both sides of the top of the bottom plate (1). The driving component includes a first rotating rod (13) rotatably mounted on the top of the bottom plate (1). Moving wheels (131) are fixedly sleeved on the outer walls at both ends of the first rotating rod (13).

4. The concrete bridge bottom surface crack detection device according to claim 3, characterized in that: Chain wheels are respectively fixedly sleeved on the outer walls of the second rotating rod (21) and the first rotating rod (13) close to it. The two chain wheels are传动连接 by a chain (23).

5. The concrete bridge bottom surface crack detection device according to claim 1, characterized in that: The handrail (12) is designed in a U shape with the opening facing downwards, and an anti-slip rubber strip is fixedly sleeved on the top outer wall of the cam (22).

6. The concrete bridge bottom surface crack detection device according to claim 1, characterized in that: The auxiliary cleaning mechanism includes a cleaning component and an auxiliary component. The cleaning component is fixedly installed on the outer wall of the handrail (12), and the auxiliary component is fixedly installed on the outer wall of the moving block (3).

7. The concrete bridge bottom surface crack detection device according to claim 6, characterized in that: The cleaning component includes two inclined rods (121) fixedly installed on the outer wall of the handrail (12). Rectangular boxes (1211) are fixedly installed on the tops of the two inclined rods (121). Rectangular installation grooves are opened on the tops of the rectangular boxes (1211).

8. The concrete bridge bottom surface crack detection device according to claim 7, characterized in that: A cleaning plate (1212) is slidably installed on the outer wall of the rectangular box (1211). The top of the cleaning plate (1212) is designed in a triangular shape. It should be noted that there is an error in the description of "传动连接" in line . It should be "driven and connected" or other appropriate expressions. The above translation is for reference only and needs to be adjusted according to the correct content.

9. The concrete bridge bottom surface crack detection device according to claim 8, characterized in that: The rectangular mounting groove on the top of the rectangular box (1211) is elastically connected to the cleaning plate (1212) via a plurality of spring telescopic rod assemblies (1213), and the plurality of spring telescopic rod assemblies (1213) are designed to be distributed at equal distances.

10. The concrete bridge bottom surface crack detection device according to claim 6, characterized in that: The auxiliary component comprises a push rod (32) fixedly mounted on the outer wall of the moving block (3) on a side away from the lifting rod (33), and a rubber ball (321) is fixedly mounted on the top end of the push rod (32).

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