A concrete bridge bottom surface crack detection device

Abstract

The application belongs to the technical field of bridge detection, and discloses a concrete bridge bottom surface crack detection device, which comprises a bottom plate, a mounting column, a supporting rod, a moving block and a motion detection mechanism.

Description

Technical Field

[0001] This invention belongs to the field of bridge inspection technology, specifically a device for detecting cracks on the bottom surface of concrete bridges. Background Technology

[0002] Cracks are often the primary culprit in structural damage to concrete bridges. Under the combined influence of the loads borne during operation and external physical and chemical factors such as temperature changes and chemical corrosion, cracks on bridges will continue to grow and deepen, forming through cracks that run through the entire structural cross-section and deep cracks. Once these cracks form, they will directly weaken the overall integrity of the bridge structure. When the cracks develop to a severe degree, they may even cause catastrophic accidents such as bridge collapse, seriously affecting the normal and safe use of the bridge structure. For this reason, crack detection in bridges has become an indispensable and crucial part of the bridge maintenance process.

[0003] For example, patent CN214467235U discloses a device for detecting cracks on the bottom surface of concrete bridges, including a base, a cylinder, and a detector. A friction block is installed at the lower end of the base, and an mounting block is provided on the outer surface of the base. A cylinder is installed at the upper end of the base, and the end of the cylinder is connected to a support plate. A guide block is installed at the lower end of the support plate, and the guide block is connected to a guide groove, which is located inside the base. A spring is installed at the upper end of the support plate, and the end of the spring is connected to a folding rod. A slider is installed at the lower end of the folding rod, and the slider is connected to a sliding groove, which is located inside the support plate. A fixing plate is installed at the upper end of the connecting plate, and the detector is located on the outer surface of the fixing plate. With this device, the user can adjust the distance between the support plate and the mounting plate using the folding rod, thus allowing the user to easily adjust the height of the detector according to their needs.

[0004] Although the aforementioned device can adjust the distance between the support plate and the mounting plate by using the folding rod, thereby adjusting the height of the detector, the conditions under the bridge are complex, with joints formed during concrete pouring and unevenness in some areas. Under such circumstances, using a detector with a fixed height can easily create blind spots during the detection process, resulting in some areas not being effectively detected.

[0005] Therefore, a device for detecting cracks on the bottom surface of concrete bridges is proposed to solve the problems mentioned in the background art. Summary of the Invention

[0006] To address the problems mentioned in the background section, the present invention provides a device for detecting cracks on the bottom surface of concrete bridges.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a concrete bridge bottom surface crack detection device, comprising: a base plate with a concave design at the top center; two sets of mounting columns, each fixedly installed on one side of the top of the base plate, with a limiting top plate fixedly installed on the top of each of the two mounting columns; a handrail, fixedly installed in the concave part of the top of the base plate; and a movable block, slidably installed on the outer wall of the two mounting columns. The motion detection mechanism is fixedly installed on one side of the outer wall of the moving block; An auxiliary cleaning mechanism is fixedly installed on the outer wall of the handrail and is movably connected to the motion detection mechanism; The motion detection mechanism includes a drive assembly and a transmission assembly. The transmission assembly includes a fixed block that is fixedly installed in the recessed area at the top of the base plate. The fixed block is designed to be inclined. A rotating rod two is rotatably installed on one side of the fixed block. A cam is fixedly sleeved on the outer wall of the rotating rod two. A rotating rod three is rotatably installed on the outer wall of the cam. A connecting rod three is hinged to the outer wall of the rotating rod three. Two connecting rod fours are respectively hinged to the outer walls on both sides of the connecting rod three. Both connecting rod fours are hinged to the moving block. Two lifting rods are fixedly installed on one side of the moving block. A detector is fixedly installed on the top of each of the two lifting rods.

[0008] Preferably, a connecting rod 1 is hinged to the top of one side of the base plate, and the connecting rod 1 is hinged to two connecting rods 4 and 3 respectively.

[0009] Preferably, there are two sets of drive components, which are respectively arranged on the top two sides of the base plate. Each drive component includes a rotating rod that is rotatably mounted on the top of the base plate, and movable wheels are fixedly sleeved on the outer walls of both ends of the rotating rod.

[0010] Preferably, chain wheels are fixedly sleeved on the outer walls of the second rotating rod and the adjacent first rotating rod, and the two chain wheels are connected by chain drive.

[0011] Preferably, the handrail is designed in the shape of an inverted triangle with the opening facing downwards, and an anti-slip rubber strip is fixedly fitted on the top outer wall of the cam.

[0012] Preferably, the auxiliary cleaning mechanism includes a cleaning component and an auxiliary component, wherein the cleaning component is fixedly installed on the outer wall of the handrail, and the auxiliary component is fixedly installed on the outer wall of the movable block.

[0013] Preferably, the cleaning assembly includes two diagonal rods fixedly installed on the outer wall of the handrail, and a rectangular box is fixedly installed on the top of each of the two diagonal rods, with a rectangular mounting groove opened on the top of the rectangular box.

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

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

[0016] Preferably, the auxiliary component includes a top rod fixedly installed on the outer wall of the movable block on the side away from the lifting rod, and a rubber ball is fixedly installed at the top end of the top rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a motion detection mechanism. After the device is moved to the bottom of the bridge and the detector is activated, workers push the handrail to move the device. During this process, through the coordinated action of a series of transmission components, such as moving wheels, rotating rod one, chain, rotating rod two, and cam, the moving block reciprocates vertically along the axis of the mounting column. This movement causes the detector to move periodically with the lifting rod, constantly changing its distance from the bridge surface, forming periodic separations. The negative pressure airflow generated at the moment of separation effectively removes residual dust from the detection head, avoiding interference from dust on the detection results. Simultaneously, the detector inspects the bridge bottom surface from different angles and distances. This multi-angle, multi-distance detection method can comprehensively cover the bridge bottom surface, effectively avoiding blind spots and greatly improving the accuracy and reliability of crack detection, providing more precise data support for bridge safety assessment.

[0018] This invention incorporates an auxiliary cleaning mechanism. When a worker pushes the handle to move the device, the inclined rod moves the rectangular box and the cleaning plate together. Because the rectangular box and the cleaning plate are elastically connected, the cleaning plate can fit tightly against the bridge surface, effectively scraping away dust and debris, creating a relatively clean working environment for the testing instrument. Furthermore, the reciprocating motion of the moving block drives the top rod and rubber ball to move together. The rubber ball continuously taps the bottom of the rectangular box, vibrating and shaking off dust and impurities adhering to the outer wall of the cleaning plate, achieving self-cleaning of the cleaning plate. This design eliminates the need for frequent manual cleaning of the cleaning plate, improving cleaning efficiency and ensuring the continuity of the cleaning effect, thus ensuring the entire testing device maintains a good working condition throughout long-term operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the side structure of the present invention; Figure 3 This is a partial structural diagram of the present invention; Figure 4 For the present invention Figure 3 A magnified structural diagram of A in the middle; Figure 5 This is a schematic diagram of the auxiliary component structure of the present invention; Figure 6 This is a schematic diagram of the drive component structure of the present invention; Figure 7 This is an exploded structural diagram of link three, link one, and link four of the present invention.

[0020] In the diagram: 1. Base plate; 11. Mounting column; 111. Limiting top plate; 12. Handrail; 121. Diagonal brace; 1211. Rectangular box; 1212. Cleaning plate; 1213. Spring telescopic rod assembly; 13. Rotating rod one; 131. Moving wheel; 14. Connecting rod one; 2. Fixing 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 Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1 to 7 As shown, the present invention provides a concrete bridge bottom surface crack detection device comprising: a base plate 1 with a concave design at the top center; two sets of mounting columns 11, each fixedly mounted on one side of the top of the base plate 1, with a limiting top plate 111 fixedly mounted on the top of each of the two mounting columns 11; a handrail 12, fixedly mounted in the concave part of the top of the base plate 1; and a movable block 3, slidably mounted on the outer wall of the two mounting columns 11. The motion detection mechanism is fixedly installed on one outer wall of the movable block 3; An auxiliary cleaning mechanism is fixedly installed on the outer wall of the handrail 12 and movably connected to the motion detection mechanism. The motion detection mechanism includes a drive assembly and a transmission assembly. The transmission assembly includes a fixed block 2 fixedly installed in the recessed area at the top of the base plate 1. The fixed block 2 is designed to be inclined. A 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 rotating rod 21. A rotating rod 221 is rotatably installed on the outer wall of the cam 22. A connecting rod 2211 is hinged to the outer wall of the rotating rod 221. Two connecting rods 31 are hinged to the outer walls of the connecting rod 3211 on both sides. Both connecting rods 31 are hinged to the moving block 3. A moving block 3 is fixedly installed on one side. Two lifting rods 33, each with a detector 331 fixedly mounted on its top; a connecting rod 14 is hinged to the top of one side of the base plate 1, and the connecting rod 14 is hinged to two connecting rods 4 31 and connecting rod 3 2211 respectively; there are two sets of drive components, respectively set on the top two sides of the base plate 1, the drive components include a rotating rod 13 rotatably mounted on the top of the base plate 1, and movable wheels 131 are fixedly sleeved on the outer walls of both ends of the rotating rod 13; a chain wheel is fixedly sleeved on the outer wall of the rotating rod 21 and the adjacent rotating rod 13, and the two chain wheels are connected by a chain 23; the handrail 12 has a U-shaped design with the opening facing downwards, and an anti-slip rubber strip is fixedly sleeved on the top outer wall of the cam 22.

[0023] The above solution, through the ingenious cooperation between the motion detection mechanism and the auxiliary cleaning mechanism, as well as the unique design of each component, achieves efficient and accurate detection of cracks on the bottom surface of concrete bridges, while ensuring the cleanliness of the detection environment during the detection process, thus improving the reliability and accuracy of the detection. Regarding the drive components, two sets are respectively set on the top sides of the base plate 1. Each set includes a rotating rod 13 rotatably mounted on the top of the base plate 1, with movable wheels 131 fixedly sleeved on the outer walls of both ends of the rotating rod 13. When the operator pushes the handle 12 to move the device, the movable wheels 131 contact the bottom surface and roll, thereby driving the rotating rod 13 to rotate. This utilizes the device's movement power, eliminating the need for an additional power source to drive the detector 331, which simplifies the device structure and reduces energy consumption and cost. At the same time, the setting of the two drive components ensures the stability of the device's movement, enabling the detector 331 to work in a stable environment and reducing detection errors caused by device shaking. In the transmission assembly, the inclined fixing block 2, fixedly installed in the recessed area at the top of the base plate 1, provides a stable support foundation for the entire transmission structure; the rotating rod 21, rotatably mounted on one side of the fixing block 2, is connected to the nearby rotating rod 13 via a chain 23; when the rotating rod 13 rotates, it drives the rotating rod 21 to rotate through the transmission action of the chain wheel and the chain 23; the cam 22 fixedly sleeved on the outer wall of the rotating rod 21 rotates accordingly, and the rotating rod 221 on the outer wall of the cam 22 also performs circular motion; the rotating rod 221... The connecting rod 3 2211, which is hinged to the wall, oscillates back and forth under the drive of the rotating rod 3 221. The two connecting rods 4 31, which are hinged to the outer walls on both sides of the connecting rod 3 2211, convert the oscillation of the connecting rod 3 2211 into linear motion, thereby driving the moving block 3, which is hinged to the connecting rod 4 31, to make a vertical reciprocating motion on the outer walls of the two mounting columns 11. This transmission method is ingeniously designed, which can convert rotational motion into linear reciprocating motion, and the transmission process is stable and reliable, ensuring the accuracy of the movement of the moving block 3. 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 movements. The distance between the detector 331 and the bottom surface of the bridge changes continuously, causing it to periodically separate from the bottom surface of the bridge. The negative pressure airflow generated at the moment of separation can effectively remove the dust remaining on the detection head and avoid 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 avoiding detection blind spots and greatly improving the accuracy and reliability of crack detection. The connecting rod 14, which is hinged to the top of one side of the base plate 1, is respectively hinged to the two connecting rods 31 and 2211, 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 sleeved on the top outer wall of the cam 22 increases the friction between the cam 22 and other transmission components, preventing slippage during transmission 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 is movably connected to the motion detection mechanism. During the movement of the device, the handrail 12 drives the auxiliary cleaning mechanism to move together and clean the bottom surface of the bridge. At the same time, the up-and-down reciprocating movement of the moving block 3 in the motion detection mechanism drives the relevant components in the auxiliary cleaning mechanism to move, realizing the coordinated work of cleaning and detection. This design allows for timely cleaning of dust and debris on the bottom surface during the detection process, creating a clean working environment for the detector 331 and further improving the accuracy of the detection. Moreover, the movable connection between the auxiliary cleaning mechanism and the motion detection mechanism makes full use of the power of the motion detection mechanism, eliminating the need for an additional power source to drive the cleaning components, which simplifies the device structure and reduces energy consumption and cost.

[0024] Please refer to this carefully. Figures 3 to 5 As shown, 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 movable block 3. The cleaning component includes two inclined rods 121 fixedly installed on the outer wall of the handrail 12. A rectangular box 1211 is fixedly installed on the top of each of the two inclined rods 121. A rectangular mounting groove is opened on the top of the rectangular box 1211. A cleaning plate 1212 is slidably installed on the outer wall of the rectangular box 1211. The top of the cleaning plate 1212 is triangular. The rectangular mounting groove on the top of the rectangular box 1211 is elastically connected to the cleaning plate 1212 by several spring telescopic rod assemblies 1213. The several spring telescopic rod assemblies 1213 are evenly distributed. The auxiliary component includes a top rod 32 fixedly installed on the outer wall of the movable block 3 on the side away from the lifting rod 33. A rubber ball 321 is fixedly installed on the top of the top rod 32.

[0025] The above solution effectively improves the cleaning effect on the bottom surface during bridge bottom inspection by working in conjunction with the cleaning components and auxiliary components, and further optimizes the working environment of the inspection instrument 331. Regarding the cleaning components, two diagonal braces 121 are fixedly installed on the outer wall of the handrail 12, providing a stable support foundation for the entire cleaning structure. A rectangular box 1211 is fixedly installed on the top of the diagonal braces 121. The rectangular mounting groove on the top of the box and the cleaning plate 1212 are elastically connected by several spring telescopic rod assemblies 1213 arranged at equal intervals. During the movement of the device, due to the elasticity of the spring telescopic rod assemblies 1213, the cleaning plate 1212 can always fit tightly against the bottom surface of the bridge. The top of the cleaning plate 1212 is triangularly designed, 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, it can clean the dust and debris on the bottom surface, creating a relatively clean environment for the subsequent operation of the detector 331 and avoiding the impact of excessive debris on the bottom surface on the detection accuracy of the detector 331. Regarding the auxiliary components, the top rod 32, fixedly installed on the outer wall of the movable block 3 away from the lifting rod 33, and the rubber ball 321 fixedly installed at the top of the top rod 32, work well with the cleaning components. During the reciprocating motion of the movable block 3, the top rod 32 and the rubber ball 321 also move together. When the rubber ball 321 moves to the position of contacting the bottom of the rectangular box 1211, it will tap the bottom of the rectangular box 1211. Since the cleaning plate 1212 and the rectangular box 1211 are elastically connected by the spring telescopic rod assembly 1213, the vibration generated by this tapping 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 are easy to adhere to the surface of the cleaning plate 1212 during long-term cleaning, affecting the cleaning effect. Through the periodic tapping 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 coordinated operation of the cleaning components and auxiliary components enables real-time cleaning of the bottom surface via the cleaning plate 1212 during bridge bottom inspection, while the tapping action of the rubber ball 321 promptly removes dust and impurities from the cleaning plate 1212, forming a complete cleaning cycle. This design not only improves cleaning efficiency but also ensures that the detector 331 is always in a relatively clean working environment, which helps improve the detection accuracy and reliability of the detector 331 and avoids detection errors caused by excessive debris on the bottom surface or dust on the cleaning plate 1212, thereby better completing the inspection task of the bridge bottom.

[0026] Working principle and usage process of this invention: First, the device is moved to the bottom of the bridge to be measured. The detector 331 is turned on, and the staff pushes the handrail 12 through ventilation, which in turn moves the base plate 1. The base plate 1 drives the moving wheel 131 and the rotating rod 13 to rotate. Through the transmission of the chain 23, the rotating rod 21 also rotates. The rotating rod 21 drives the cam 22 to rotate along the outer wall of the cam 22. The cam 22 drives the rotating rod 3 221 to rotate. The rotating rod 3 221 drives the connecting rod 3 2211 to drive the connecting rod 1 14 and the two connecting rods 4 31 to move closer and further apart. Through the hinge of the connecting rod 4 31 and the moving block 3, the movement is achieved. Block 3 reciprocates vertically along the axis of the two mounting columns 11. The limiting top plate 111 prevents the moving block 3 from moving excessively and detaching from the mounting columns 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. As the distance between the detector 331 and the bottom surface of the bridge changes continuously, the detector 331 and the bottom surface of the bridge form a periodic separation. The separation instant generates a negative pressure airflow, thereby sucking away the dust remaining in the detection head. During the periodic separation process, the detector 331 can detect the bottom surface of the bridge from different angles and distances, avoiding the occurrence of blind spots in the detection. Meanwhile, the fixed connection between the handrail 12 and the diagonal bar 121 allows the handrail 12 to move together with the rectangular box 1211 and the cleaning plate 1212 during the movement of the handrail 12. The elastic connection between the rectangular box 1211 and the cleaning plate 1212 allows the cleaning plate 1212 to fit against the bottom surface of the bridge for cleaning. During the up-and-down reciprocating motion of the moving block 3, the top rod 32 and the rubber ball 321 move together. The continuous movement of the rubber ball 321 taps the bottom of the rectangular box 1211, which can shake off the dust and impurities attached to the outer wall of the cleaning plate 1212.

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

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

Claims

1. A device for detecting cracks on the bottom surface of concrete bridges, characterized in that: include: The base plate (1) has a concave design at the top center; There are two sets of mounting columns (11) that are fixedly installed on the top side of the base plate (1), and a limit plate (111) is fixedly installed on the top of each of the two mounting columns (11). A handrail (12) is fixedly installed in the recess at the top of the base plate (1); The movable block (3) is slidably mounted on the outer wall of the two mounting columns (11); The motion detection mechanism is fixedly installed on one side of the outer wall of the movable block (3); An auxiliary cleaning mechanism is fixedly installed on the outer wall of the handrail (12) and is movably connected to the motion detection mechanism; The motion detection mechanism includes a drive assembly and a transmission assembly. The transmission assembly includes a fixed block (2) fixedly installed in the recessed area at the top of the base plate (1). The fixed block (2) is designed in an inclined shape. A 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 rotating rod (21). A rotating rod (221) is rotatably installed on the outer wall of the cam (22). A connecting rod (2211) is hinged on the outer wall of the rotating rod (221). Two connecting rods (31) are hinged on the outer walls of the connecting rods (2211) on both sides respectively. Both connecting rods (31) are hinged to the moving block (3). Two lifting rods (33) are fixedly installed on one side of the moving block (3). A detector (331) is fixedly installed on the top of each of the two lifting rods (33). A connecting rod 1 (14) is hinged to the top of one side of the base plate (1), and the connecting rod 1 (14) is hinged to two connecting rods 4 (31) and connecting rod 3 (2211) respectively; The drive assembly has two sets, which are respectively set on the top two sides of the base plate (1). The drive assembly includes a rotating rod (13) that is rotatably mounted on the top of the base plate (1). The outer walls of the two ends of the rotating rod (13) are respectively fixedly fitted with movable wheels (131). Chain wheels are fixedly fitted on the outer walls of the second rotating rod (21) and the adjacent first rotating rod (13), and the two chain wheels are connected by a chain (23). The handrail (12) is designed in the shape of a c, with the opening facing downwards, and the top outer wall of the cam (22) is fixedly fitted with an anti-slip rubber strip; 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 movable block (3). The cleaning assembly includes two diagonal rods (121) fixedly installed on the outer wall of the handrail (12). A rectangular box (1211) is fixedly installed on the top of each of the two diagonal rods (121). A rectangular mounting groove is provided on the top of the rectangular box (1211). A cleaning plate (1212) is slidably installed on the outer wall of the rectangular box (1211), and the top of the cleaning plate (1212) is triangular in design; The rectangular mounting slot at the top of the rectangular box (1211) and the cleaning plate (1212) are elastically connected by a number of spring telescopic rod assemblies (1213), and the number of spring telescopic rod assemblies (1213) are designed to be evenly distributed. The auxiliary component includes a top rod (32) fixedly installed on the outer wall of the movable block (3) on the side away from the lifting rod (33), and a rubber ball (321) is fixedly installed at the top of the top rod (32).

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