Civil engineering road and bridge crack surveying device

Abstract

The invention relates to the technical field of bridge crack surveying, and discloses a civil engineering road bridge crack surveying device which comprises a top plate and a lifting frame, two sets of connecting frames are symmetrically fixed to the two sides of the top plate, a concentric-square-shaped plate is arranged under the lifting frame, and a surveying assembly is installed on the inner side of the bottom of the lifting frame; the device further comprises a sweeping unit installed at the bottom of the concentric-square-shaped plate, the sweeping unit is used for conducting preliminary cleaning treatment on a crack to be surveyed, a lifting unit is arranged between the top plate and the lifting frame, and a linkage unit in transmission connection with the sweeping unit is installed on one side of the connecting frame. Under the action of the designed sweeping unit, the lifting unit and the linkage unit, before the surveying assembly descends to the position over a surveying site, pollutants on the road surface part of a detection area can be automatically cleaned, cracks can be found more clearly before surveying work, the cracks are prevented from being covered by the pollutants, and the detection efficiency is improved. Therefore, the visual identification becomes difficult, and the accuracy of the survey result is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge crack surveying, and specifically to a civil engineering road bridge crack surveying device. Background Art

[0002] The problem of bridge cracks is one of the most concerning safety issues among many factors that can cause bridge safety accidents. The occurrence of bridge cracks may pose a risk of collapse for trucks, thus threatening the safe operation of the bridge. To stabilize the bridge deck, almost all bridges focus on concrete and rubber. However, even the best concrete and rubber that can bond the bridge deck and the bottom of the bridge beam cannot cope with the damage caused by long-term wear to the bridge deck and the bottom of the beam.

[0003] After cracks appear in the bridge structure, the purpose of monitoring is to test the working state of the cracks under the action of live loads on the bridge to evaluate their impact on the structure. In the prior art, most crack detections of the road and bridge surface are carried out through the high-definition detection probe of an image-type crack meter. The high-definition detection probe is used in cooperation with an operation tablet. This method requires one hand to control the probe and the other hand to control the tablet for data comparison and recording, which is very inconvenient. To facilitate the operation, the Chinese patent document CN202211465432.0 discloses a civil engineering road bridge crack surveying device, including a U-shaped partition board, and a crank is movably installed on the upper surface of the U-shaped partition board. With this invention, a single person can control the surveying probe and the tablet computer to complete the crack survey of the road bridge by holding the inclined support rod frame in cooperation with the universal wheels and stepping on the locking sleeve. The height of the surveying probe fitting the ground can be controlled by the first threaded rod, and manual control is more convenient to master. The driving of the first servo motor and the second servo motor can control the surveying probe to move to any position on the bottom surface of the first square frame, with a high degree of automation, and can perform multiple coverage detections within a fixed area, improving the accuracy of beam crack surveying, and effectively solving the problem that it is very inconvenient to control the probe with one hand and the tablet with the other hand for data comparison and recording during the existing manual road bridge crack surveying process. Although the above-mentioned road bridge crack surveying method has a certain degree of convenience, in the actual surveying process, the road surface of the bridge directly below the surveying probe is often not in an ideal state. On the road surface of the detection area, there are often scattered fallen leaves, dirt, and various other forms of pollutants. The presence of these pollutants will obscure the bridge cracks, making it difficult to detect the cracks. Therefore, when directly using the surveying probe for surveying, it may be difficult to ensure that the survey results have a high degree of accuracy because some bridge cracks may be covered by pollutants, making them visually difficult to identify, resulting in a negative impact on the accuracy of the survey results. Summary of the Invention

[0004] The purpose of the present invention is to provide a civil engineering road bridge crack survey device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a civil engineering road bridge crack survey device, comprising a top plate and a lifting frame, two groups of connecting frames are symmetrically fixed on both sides of the top plate, a circular plate is provided directly below the lifting frame, and a survey component is installed on the inner side of the bottom of the lifting frame; it also includes: a cleaning unit installed at the bottom of the circular plate, the cleaning unit is used to perform preliminary cleaning treatment on the cracks to be surveyed, a lifting unit is provided between the top plate and the lifting frame, and a linkage unit connected to the cleaning unit by transmission is installed on one side of the connecting frame; storage units are fixed on both sides of the top of the circular plate, the storage units are used to hide the cleaning units, and trigger racks are fixed on both side outer walls of the lifting frame; a movable wheel frame is installed on one side of the bottom of the connecting frame, and support units are installed on both front and rear sides of the lifting frame.

[0006] Preferably, the cleaning unit includes a reciprocating screw, a connecting shaft, a nut block, a cleaning brush and a U-shaped block. The reciprocating screw is symmetrically provided with two groups. Connecting shafts are fixed at both ends of the reciprocating screw. The nut block is threadedly connected to the outside of the reciprocating screw. The bottoms of the two nut blocks are commonly connected to the cleaning brush. The connecting shaft is rotatably connected to the U-shaped block through a bearing. The top of the U-shaped block is fixed to the bottom of the circular plate. The output end of the linkage unit is transmission-connected to the connecting shaft.

[0007] Preferably, the lifting unit includes a worm, a worm wheel, a No. 1 threaded tube and a No. 1 threaded column, the worm and the worm wheel are meshingly connected, the worm wheel is fixedly sleeved with the No. 1 threaded tube, the No. 1 threaded tube is rotatably connected to the center position of the top plate through a bearing, the No. 1 threaded column is threadedly connected to the No. 1 threaded tube, the bottom end of the No. 1 threaded column is fixedly connected to the lifting frame, the worm is rotatably connected to the top plate through a bearing seat, both ends of the worm are fixed with drive rods, the drive rod is rotatably connected to the top of the connecting frame through a bearing, one end of one of the drive rods is fixed with a handwheel, and the input end of the linkage unit is drivingly connected to the drive rod.

[0008] Preferably, the linkage unit includes a first driving pulley, a first synchronous belt, a first driven pulley, a second driven pulley, a first transmission rod, a first gear and a second gear. The first driving pulley is fixedly sleeved on the driving rod. The first driving pulley is connected to the first driven pulley and the second driven pulley through the first synchronous belt. A first transmission rod is fixedly arranged in the middle holes of the first transmission belt pulley and the second driven pulley. Each first transmission rod is rotatably connected to the connecting frame through a bearing, and a first gear is fixedly sleeved at one end of each first transmission rod. The second gear is fixedly sleeved on the connecting shaft, and the second gear is meshed with the first gear.

[0009] Preferably, the storage unit includes a second threaded pipe, a second threaded column, a fixing rod, a U-shaped connecting plate and a transmission member. The second threaded pipe is rotatably connected to the top plate through a bearing. The second threaded column is threadedly connected to the second threaded pipe. The fixing rod is fixed at the bottom of the second threaded column. The U-shaped connecting plate is fixedly connected between the return plate and the fixing rod. A transmission member is connected to the bottom of the second threaded pipe.

[0010] Preferably, the transmission member includes a positioning plate, a connecting column, a driving bevel gear, a driven bevel gear, a second transmission rod, a second driving pulley, a second synchronous belt, a third driven pulley, a third transmission rod and a third gear. The top of the driven bevel gear is fixedly connected to the bottom of the second threaded pipe through the three connecting columns. The driven bevel gear is meshed with the driving bevel gear. The positioning plate is fixed to the bottom of the top plate. The second transmission rod and the third transmission rod are both rotatably connected to the positioning plate through bearings. The driving bevel gear and the third driven pulley are respectively fixed at both ends of the second transmission rod. The second driving pulley and the third driven pulley are connected through the second synchronous belt. The second driving pulley and the third gear are both fixedly sleeved on the third transmission rod. Preferably, an avoidance groove adapted to the U-shaped connecting plate is formed on the outer side of the lifting frame.

[0011] Preferably, the support unit includes a side mounting plate, a sliding block, a fixing block, a sliding rod and a support block. The side mounting plate is fixed to the outer side wall of the lifting frame. The sliding block is slidably connected to the side mounting plate. The fixing block is fixed to the side mounting plate. The sliding block is fixedly sleeved on the sliding rod. The sliding rod is slidably sleeved on the fixing block. The support block is fixed at the bottom end of the sliding rod. A spring is arranged on the outer side of the sliding rod between the sliding block and the fixing block.

[0012] Preferably, limiting holes are formed at the four corners of the top plate. A diamond column is slidably connected in the limiting hole. The bottom end of the diamond column is fixed to the top of the lifting frame.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By improving the existing survey device, the present invention can automatically clean the road surface of the detection area before lowering the survey component directly above the survey location under the action of the designed sweeping unit, lifting unit and linkage unit, making the cracks more clearly visible before the survey work, avoiding the cracks being covered by pollutants and thus becoming visually difficult to identify, and improving the accuracy of the survey results.

[0014] 2. After the cleaning work is completed, the sweeping unit in the present invention can be automatically hidden inside the lifting frame through the storage unit, thus ensuring that there is no object blocking directly above the detection area and making the detection area more complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a side view of the present invention; Figure 3 is a schematic diagram of the structure of the sweeping unit of the present invention; Figure 4 is a schematic diagram of the structures of the lifting unit and the linkage unit of the present invention; Figure 5 is a schematic diagram of the structure of the storage unit of the present invention; Figure 6 is a schematic diagram of the structure of the transmission member of the present invention; Figure 7 is a schematic diagram of the structure of the support unit of the present invention.

[0016] In the figure: 1. Top plate; 2. Lifting frame; 3. Connecting frame; 4. Square plate; 5. Sweeping unit; 51. Reciprocating lead screw; 52. Connecting shaft; 53. Nut block; 54. Cleaning brush; 55. U-shaped block; 6. Lifting unit; 61. Worm; 62. Worm gear; 63. First threaded pipe; 64. First threaded column; 65. Driving rod; 66. Handwheel; 67. Limit hole; 68. Rhombic column; 7. Linkage unit; 71. First driving pulley; 72. First synchronous belt; 73. First driven pulley; 74. Second driven pulley; 75. First transmission rod; 76. First gear; 77. Second gear; 8. Storage unit; 81. Second threaded pipe; 82. Second threaded column; 83. Fixed rod; 84. U-shaped connecting plate; 85. Transmission part; 850. Positioning plate; 851. Connecting column; 852. Driving bevel gear; 853. Driven bevel gear; 854. Second transmission rod; 855. Second driving pulley; 856. Second synchronous belt; 857. Third driven pulley; 858. Third transmission rod; 859. Third gear; 9. Support unit; 91. Side mounting plate; 92. Sliding block; 93. Fixed block; 94. Slide bar; 95. Support block; 96. Spring; 10. Trigger rack; 11. Moving wheel frame; 12. Avoidance groove. Specific implementation manner

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Embodiment 1: Please refer to Figure 1 and Figure 2 , a civil engineering road and bridge crack detection device shown in the figure, including a top plate 1 and a lifting frame 2. Two groups of connecting frames 3 are symmetrically and fixedly arranged on both sides of the top plate 1. A square plate 4 is arranged directly below the lifting frame 2. A detection component (not labeled in the figure) is installed inside the bottom of the lifting frame 2. Here, the detection component mainly consists of a detection probe, an X-axis linear module, and a Y-axis linear module. By driving the X-axis linear module and the Y-axis linear module, the detection probe can be controlled to move to any position at the bottom of the lifting frame 2. The degree of automation is high, and multiple coverage detections can be carried out within a fixed area, improving the accuracy of beam crack detection. Among them, the detection probe, the X-axis linear module, and the Y-axis linear module are all existing device structures, and their working principles and specific structures will not be elaborated too much, and reference can also be made to the Chinese patent document with the application number 202211465432.0; It further includes: a cleaning unit 5 installed at the bottom of the loop-shaped plate 4, the cleaning unit 5 being used for performing preliminary cleaning on the cracks to be surveyed; a lifting unit 6 provided between the top plate 1 and the lifting frame 2; and a linkage unit 7 installed on one side of the connecting frame 3 and in transmission connection with the cleaning unit 5. During the process of the lifting unit 6 driving the lifting frame 2 to move downward, the linkage unit 7 will drive the cleaning unit 5 to perform reciprocating motion, thereby synchronously cleaning the pollutants on the detection area. A storage unit 8 fixed to both sides of the top of the loop-shaped plate 4, the storage unit 8 being used for hiding the cleaning unit 5. Trigger racks 10 are fixed to the outer walls on both sides of the lifting frame 2. When the lifting frame 2 drives the trigger racks 10 and the storage unit 8 to produce linkage, the cleaning unit 5 will be further moved upward, so that the cleaning unit 5 is hidden inside the lifting frame 2, thereby ensuring that there is no object blocking directly above the detection area and making the detection area more complete. A moving wheel frame 11 installed on one side of the bottom of the connecting frame 3. Support units 9 are installed on the front and rear sides of the lifting frame 2. Before the survey, the lifting frame 2 drives the support units 9 to move downward, causing the moving wheel frame 11 to move upward relatively, so as to provide better support by relying on the support units 9 during the detection and avoid the problem of the entire device shaking during the detection due to the instability of the moving wheel frame 11.

[0019] Further, referring to Figure 3 The cleaning unit 5 includes a reciprocating lead screw 51, a connecting shaft 52, a nut block 53, a cleaning brush 54, and a U-shaped block 55. There are two groups of reciprocating lead screws 51 symmetrically arranged. Connecting shafts 52 are fixed to both ends of the reciprocating lead screw 51. The nut block 53 is threadedly connected to the outside of the reciprocating lead screw 51. The bottoms of the two nut blocks 53 are jointly connected to the cleaning brush 54. The connecting shaft 52 is rotatably connected to the U-shaped block 55 through a bearing. The top of the U-shaped block 55 is fixed to the bottom of the loop-shaped plate 4. The output end of the linkage unit 7 is in transmission connection with the connecting shaft 52.

[0020] Specifically, since the survey component is initially at a relatively far distance from the ground, it is necessary to manually operate the lifting unit 6 to work. The lifting unit 6 drives the lifting frame 2 to move downward, and then drives the survey component to move in the direction close to the ground. At the same time, the lifting unit 6 will also drive the linkage unit 7 to work. The linkage unit 7 drives the connecting shaft 52 to rotate. The connecting shaft 52 drives the reciprocating lead screw 51 to rotate. The reciprocating lead screw 51 drives the nut block 53 to reciprocate, and then drives the cleaning brush 54 to reciprocate. The bottom surface of the cleaning brush 54 makes relative motion with the ground, thereby quickly cleaning the pollutants in the detection area and making the cracks more clearly visible before the survey work.

[0021] Further, referring to Figure 4, the lifting unit 6 includes a worm 61, a worm gear 62, a first threaded tube 63 and a first threaded column 64. The worm 61 and the worm gear 62 are meshed and connected. The worm gear 62 is fixedly sleeved with the first threaded tube 63. The first threaded tube 63 is rotatably connected to the center position on the top plate 1 through a bearing. The first threaded column 64 is threadedly connected to the first threaded tube 63. The bottom end of the first threaded column 64 is fixedly connected to the lifting frame 2. The worm 61 is rotatably connected to the top plate 1 through a bearing seat. Driving rods 65 are fixedly arranged at both ends of the worm 61. The driving rods 65 are rotatably connected to the top of the connecting frame 3 through bearings. A handwheel 66 is fixedly arranged at one end of one of the driving rods 65. The input end of the linkage unit 7 is drivingly connected to the driving rod 65.

[0022] Specifically, after the device is moved to the detection area, personnel can manually rotate the handwheel 66. The handwheel 66 drives the driving rod 65 to rotate. The driving rod 65 drives the worm 61 to rotate. The worm 61 drives the worm gear 62 to rotate. The worm gear 62 drives the first threaded tube 63 to rotate. The first threaded tube 63 drives the first threaded column 64 to move downward, thereby pushing the lifting frame 2 downward, so that the survey component can smoothly move directly above the detection area.

[0023] Further, referring to Figure 4 , the linkage unit 7 includes a first driving pulley 71, a first synchronous belt 72, a first driven pulley 73, a second driven pulley 74, a first transmission rod 75, a first gear 76 and a second gear 77. The first driving pulley 71 is fixedly sleeved with the driving rod 65. The first driving pulley 71 is drivingly connected to the first driven pulley 73 and the second driven pulley 74 through the first synchronous belt 72. First transmission rods 75 are fixedly arranged in the central holes of the first driven pulley 73 and the second driven pulley 74. Each first transmission rod 75 is rotatably connected to the connecting frame 3 through a bearing. A first gear 76 is fixedly sleeved at one end of each first transmission rod 75. The second gear 77 is fixedly sleeved with the connecting shaft 52. The second gear 77 and the first gear 76 are meshed and connected; Specifically, when a person rotates the drive rod 65 by using the handwheel 66, the drive rod 65 will also drive the first driving pulley 71 to rotate. The first driving pulley 71 drives the first driven pulley 73 and the second driven pulley 74 to rotate together through the first synchronous belt 72, and drives the two first transmission rods 75 to rotate, so that the first transmission rod 75 drives the first gear 76 to rotate, and the first gear 76 drives the second gear 77 to rotate, thereby realizing the simultaneous rotation of the two reciprocating lead screws 51, with better stability, so that the cleaning brush 54 will not shift during the left and right reciprocating movement. Moreover, the descending action of the lifting frame 2 and the cleaning action of the cleaning unit 5 generate a linkage reaction, without the need to spend extra time on area arrangement, saving the time required for cleaning the detection area.

[0024] It should be noted that: Refer to Figure 4 and Figure 5 During the lifting process of the lifting frame 2, since the limiting holes 67 are opened at the four corners of the top plate 1, a diamond column 68 is slidably connected in the limiting holes 67, and the bottom end of the diamond column 68 is fixed to the top of the lifting frame 2, so the lifting frame 2 will drive the diamond column 68 to slide in the limiting holes 67, causing a relative vertical displacement between the lifting frame 2 and the top plate 1, ensuring that the lifting frame 2 will not shake during displacement.

[0025] Embodiment 2: Please refer to Figure 5 and Figure 6 This embodiment further explains Embodiment 1, and the difference lies in optimizing the cleaning unit 5.

[0026] Specifically, the storage unit 8 includes a second threaded pipe 81, a second threaded column 82, a fixed rod 83, a U-shaped connecting plate 84 and a transmission member 85. The second threaded pipe 81 is rotatably connected to the top plate 1 through a bearing. The second threaded column 82 is threadedly connected to the second threaded pipe 81. The fixed rod 83 is fixed to the bottom of the second threaded column 82. The U-shaped connecting plate 84 is fixedly connected between the return plate 4 and the fixed rod 83. A transmission member 85 is drivingly connected to the bottom of the second threaded pipe 81; Meanwhile, the transmission member 85 includes a positioning plate 850, a connecting column 851, a driving bevel gear 852, a driven bevel gear 853, a second transmission rod 854, a second driving pulley 855, a second synchronous belt 856, a third driven pulley 857, a third transmission rod 858 and a third gear 859. The top of the driven bevel gear 853 is fixedly connected to the bottom of the second threaded pipe 81 through the three connecting columns 851. The driven bevel gear 853 is meshed with the driving bevel gear 852. The positioning plate 850 is fixed to the bottom of the top plate 1. Both the second transmission rod 854 and the third transmission rod 858 are rotatably connected to the positioning plate 850 through bearings. The driving bevel gear 852 and the third driven pulley 857 are respectively fixed to both ends of the second transmission rod 854. The second driving pulley 855 and the third driven pulley 857 are drivingly connected through the second synchronous belt 856. Both the second driving pulley 855 and the third gear 859 are fixedly sleeved on the third transmission rod 858.

[0027] Specifically, since the cleaning brush 54 is located directly below the surveying assembly, it will interfere with the downward-facing photographing of the surveying probe. Here, when the lifting frame 2 is lowered to a certain position, the trigger rack 10 can be triggered to drive the third gear 859 to rotate. The third gear 859 drives the third transmission rod 858 and the second driving pulley 855 to rotate. The second driving pulley 855 drives the third driven pulley 857 to rotate through the second synchronous belt 856. The third driven pulley 857 drives the driving bevel gear 852 to rotate. The driving bevel gear 852 drives the driven bevel gear 853 to rotate. The driven bevel gear 853 drives the second threaded pipe 81 to rotate. The second threaded pipe 81 drives the second threaded post 82 to move upward, thereby driving the fixed rod 83 and the U-shaped connecting plate 84 to move upward together. Finally, the upward movement of the return plate 4 is realized. At this time, the lifting frame 2 and the return plate 4 move closer to each other until after the trigger rack 10 and the third gear 859 are disengaged from meshing, the return plate 4 drives the sweeping unit 5 to move upward and completely hide inside the lifting frame 2. And when the sweeping unit 5 moves upward, the first gear 76 and the second gear 77 are automatically disengaged from meshing, that is, the sweeping unit 5 will not perform left-right reciprocating actions when moving upward.

[0028] Meanwhile, it is worth noting that referring to Figure 7 , an avoidance groove 12 adapted to the U-shaped connecting plate 84 is provided on the outer side of the lifting frame 2 to prevent interference when the U-shaped connecting plate 84 approaches the lifting frame 2 and ensure that the return plate 4 can more smoothly enter the interior of the lifting frame 2.

[0029] Embodiment 3: Please refer to Figure 7 , this embodiment further illustrates other embodiments. The difference is that a support unit 9 is added to effectively support the device.

[0030] Specifically, the support unit 9 includes a side mounting plate 91, a sliding block 92, a fixing block 93, a sliding rod 94 and a support block 95. The side mounting plate 91 is fixed to the outer side wall of the lifting frame 2. The sliding block 92 is slidably connected to the side mounting plate 91. The fixing block 93 is fixedly connected to the side mounting plate 91. The sliding block 92 is fixedly sleeved with the sliding rod 94. The sliding rod 94 is slidably sleeved with the fixing block 93. The support block 95 is fixed to the bottom end of the sliding rod 94. A spring 96 is provided between the sliding block 92 and the fixing block 93 on the outer side of the sliding rod 94.

[0031] Specifically, when the lifting frame 2 moves downward until the support block 95 contacts the detected road surface, the moving wheels of the moving wheel frame 11 are not in contact with the road surface for support. The entire device is supported by the four support blocks 95. On the one hand, it avoids the phenomenon of shaking when the moving wheels are supporting. On the other hand, when working on an uneven road surface, under the action of the self-weight of the device, the four springs 96 are compressed to different lengths, so that the bottom ends of the four support blocks 95 can all contact the road surface, improving the stability of the device position.

[0032] It should be noted that in this article, relational terms such as first and second are only used 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A civil engineering road bridge crack survey device, comprising: A top plate (1) and a lifting frame (2), wherein two groups of connecting frames (3) are symmetrically fixed on both sides of the top plate (1), a circular plate (4) is provided directly below the lifting frame (2), and a surveying component is installed on the inner side of the bottom of the lifting frame (2); It is characterized by further comprising: A cleaning unit (5) is installed at the bottom of the circular plate (4), and the cleaning unit (5) is used to perform preliminary cleaning treatment on the cracks to be surveyed. A lifting unit (6) is provided between the top plate (1) and the lifting frame (2), and a linkage unit (7) drivingly connected to the cleaning unit (5) is installed on one side of the connecting frame (3); Storage units (8) are fixed on both sides of the top of the circular plate (4), and the storage units (8) are used to hide the cleaning unit (5). Trigger racks (10) are fixed on both side outer walls of the lifting frame (2); A movable wheel frame (11) is installed on one side of the bottom of the connecting frame (3), and support units (9) are installed on both the front and rear sides of the lifting frame (2).

2. A civil engineering road bridge crack survey device according to claim 1, characterized in that: The cleaning unit (5) comprises a reciprocating screw (51), a connecting shaft (52), a nut block (53), a cleaning brush (54) and a U-shaped block (55). The reciprocating screw (51) is symmetrically provided with two groups. The two ends of the reciprocating screw (51) are both fixed with a connecting shaft (52). The nut block (53) is threadedly connected to the outer side of the reciprocating screw (51). The bottoms of the two nut blocks (53) are connected to the cleaning brush (54). The connecting shaft (52) is rotatably connected to the U-shaped block (55) via a bearing. The top of the U-shaped block (55) is fixed to the bottom of the circular plate (4). The output end of the linkage unit (7) is drivingly connected to the connecting shaft (52).

3. A civil engineering road bridge crack survey device according to claim 2, characterized in that: The lifting unit (6) comprises a worm (61), a worm wheel (62), a No. 1 threaded tube (63) and a No. 1 threaded column (64); the worm (61) and the worm wheel (62) are meshedly connected; the worm wheel (62) and the No. 1 threaded tube (63) are fixedly sleeved; the No. 1 threaded tube (63) is rotatably connected to the center position of the top plate (1) via a bearing; the No. 1 threaded column (64) is threadedly connected to the No. 1 threaded tube (63); the bottom end of the No. 1 threaded column (64) is fixedly connected to the lifting frame (2); the worm (61) is rotatably connected to the top plate (1) via a bearing seat; driving rods (65) are fixed at both ends of the worm (61); the driving rods (65) are rotatably connected to the top of the connecting frame (3) via a bearing; a hand wheel (66) is fixed at one end of one of the driving rods (65); and the input end of the linkage unit (7) is drivingly connected to the driving rod (65).

4. A civil engineering road bridge crack survey device according to claim 3, characterized in that: The linkage unit (7) comprises a first driving pulley (71), a first synchronous belt (72), a first driven pulley (73), a second driven pulley (74), a first transmission rod (75), a first gear (76) and a second gear (77); the first driving pulley (71) is fixedly sleeved with the drive rod (65); the first driving pulley (71) and the first driven pulley (73) and the second driven pulley (74) are connected via the first synchronous belt (72). A transmission connection is provided, wherein a first transmission rod (75) is fixed in the middle hole of the first driven pulley (73) and the second driven pulley (74), each of the first transmission rods (75) is rotationally connected to the connecting frame (3) via a bearing, and one end of each of the first transmission rods (75) is fixedly sleeved with a first gear (76), the second gear (77) is fixedly sleeved with the connecting shaft (52), and the second gear (77) is meshingly connected with the first gear (76).

5. The civil engineering road bridge crack survey device according to claim 2, characterized in that: The storage unit (8) comprises a No. 2 threaded tube (81), a No. 2 threaded column (82), a fixing rod (83), a U-shaped connecting plate (84) and a transmission member (85); the No. 2 threaded tube (81) is rotatably connected to the top plate (1) via a bearing; the No. 2 threaded column (82) is threadedly connected to the No. 2 threaded tube (81); the fixing rod (83) is fixed to the bottom of the No. 2 threaded column (82); the circular plate (4) and the fixing rod (83) are fixedly connected via the U-shaped connecting plate (84); and the bottom of the No. 2 threaded tube (81) is transmission-connected with the transmission member (85).

6. A civil engineering road bridge crack survey device according to claim 5, characterized in that: The transmission member (85) comprises a positioning plate (850), a connecting column (851), a driving bevel gear (852), a passive bevel gear (853), a second transmission rod (854), a second driving pulley (855), a second synchronous belt (856), a third driven pulley (857), a third transmission rod (858) and a third gear (859); the top of the passive bevel gear (853) is fixedly connected to the bottom of the second threaded tube (81) via the three connecting columns (851); the passive bevel gear (853) and the driving bevel gear (852) are meshedly connected; the positioning plate ( 850) is fixed to the bottom of the top plate (1), the second transmission rod (854) and the third transmission rod (858) are both rotatably connected to the positioning plate (850) via bearings, the active bevel gear (852) and the third driven pulley (857) are respectively fixed to the two ends of the second transmission rod (854), the second active pulley (855) and the third driven pulley (857) are connected in transmission via the second synchronous belt (856), and the second active pulley (855) and the third gear (859) are both fixedly sleeved with the third transmission rod (858).

7. The civil engineering road bridge crack survey device according to claim 5, characterized in that: An escape groove (12) adapted to the U-shaped connecting plate (84) is provided on the outer side of the lifting frame (2).

8. The civil engineering road bridge crack survey device according to claim 1, characterized in that: The support unit (9) comprises a side mounting plate (91), a sliding block (92), a fixed block (93), a sliding rod (94) and a support block (95); the side mounting plate (91) is fixed to the outer side wall of the lifting frame (2); the sliding block (92) is slidably connected to the side mounting plate (91); the fixed block (93) is fixedly connected to the side mounting plate (91); the sliding block (92) is fixedly sleeved with the sliding rod (94); the sliding rod (94) is slidably sleeved with the fixed block (93); the support block (95) is fixed to the bottom end of the sliding rod (94); a spring (96) is provided on the outer side of the sliding rod (94) and between the sliding block (92) and the fixed block (93).

9. The civil engineering road bridge crack survey device according to claim 3, characterized in that: Limiting holes (67) are provided at the four corners of the top plate (1), a rhombus-shaped column (68) is slidably connected in the limiting hole (67), and the bottom end of the rhombus-shaped column (68) is fixed to the top of the lifting frame (2).

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