A method for detecting cracks in road bridges

Abstract

The application discloses a road bridge crack detection method, belonging to the technical field of road crack detection, which comprises the steps of detection construction, crack marking and auxiliary dust removal, wherein the auxiliary dust removal comprises the following steps: in the process of downward movement of the paint block, the air frame is synchronously moved downward, the connecting rod is moved downward, the pressing rod presses the pressing plate, the pressing plate extrudes the top of the plurality of air bags, the internal space of the plurality of air bags is extruded, the gas in the air bag flows into the internal space of the air frame through the second connecting hose, the gas is sprayed to the position of the road surface below the paint block through the air hole, the dust on the road surface is blown away, the marking effect of the paint on the road surface is improved, and the marking mark is not obvious due to too much dust on the road surface.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road crack detection, and particularly relates to a road and bridge crack detection method. BACKGROUND

[0002] In the current social development process in China, the role of roads and bridges is crucial, so more attention should be paid to the quality of roads and bridges, and strict control and management should be implemented. Especially the crack problem in the road and bridge construction process. At present, due to the long-term effect of driving load and the influence of natural factors, cracks will occur on the road surface of urban roads and bridges. If the road and bridge has a crack problem, it will affect the safety and quality of the overall project. If the crack is not repaired in time, it will cause road surface pits, thereby causing deeper damage to the road surface, and also affecting driving safety. In order to prevent road damage and maintain the good technical condition of the road surface, technical measures are usually taken for the pavement maintenance of roads and bridges. In the pavement maintenance process, crack detection is a very important step.

[0003] When detecting the road surface of the road and bridge, the position of the crack is often determined by manual marking by the staff, thereby increasing the labor intensity of the staff using the detection device and reducing the detection speed. SUMMARY

[0004] The purpose of the present application is to solve the problem that the crack cannot be marked in the prior art, and a road and bridge crack detection method is provided.

[0005] In order to achieve the above-mentioned purpose, the present application adopts a road and bridge crack detection method comprising the following steps:

[0006] Detection construction: the detection personnel pushes the push rod to move forward through the roller, and detects whether there is a crack in the road and bridge through the detection assembly during movement. After the detection assembly detects a crack, the alarm emits a prompt sound at this time, timely notifying the detection personnel. Then the detection personnel mark the crack;

[0007] Crack marking: the push plate is driven by the hydraulic cylinder to move downward, and the push plate drives the paint block to move downward. Then the paint block contacts the road surface. After that, the paint block is extruded, and the paint for marking is flowed out to the road surface through the first slot and the second slot, thereby completing the marking of the surrounding of the crack;

[0008] Auxiliary dust removal: through the downward movement of the paint block, the ventilation frame is lowered synchronously, and the connecting rod is lowered in the process, so that the pressing rod presses the pressing plate, the pressing plate extrudes the top of the plurality of air bags, the internal space of the plurality of air bags is extruded, then the gas in the air bag flows into the inside of the ventilation frame through the second connecting hose, and then the gas is sprayed out through the air hole to blow away the dust on the road surface below the paint block, so that the marking effect of the paint on the road surface is improved, and the marking mark is not obvious due to too much dust on the road surface.

[0009] In order to achieve the above purpose, the application also adopts a kind of road bridge crack detection device, including bottom plate, the top of the bottom plate is fixedly connected with paint tank, and the side wall of paint tank is fixedly connected with connecting block, the top of the paint tank is fixedly connected with mounting bracket, and hydraulic cylinder is fixedly installed in the inside of mounting bracket, and the output shaft of the hydraulic cylinder is provided with marking mechanism;

[0010] The marking mechanism includes a paint box, which can mark the position of the crack when the crack is detected;

[0011] The top of the paint box is provided with a dust removal mechanism, so that the marking position can be cleaned before marking the crack.

[0012] Further, the top of the paint box is fixedly connected with a connecting rod, and the top of the connecting rod is fixedly connected with a push plate, the top of the paint box is fixedly connected with a second spring corresponding to the outer wall of the connecting rod, the inner wall of the paint box is slidably connected with a plurality of paint blocks, the top of each of the plurality of paint blocks is fixedly connected with a third spring, the end of the third spring away from the paint block is fixedly connected to the inner wall of the paint box, the top of the paint block is provided with a first slot, and the outer wall of the paint block is provided with a second slot, the outer wall of the connecting rod is fixedly connected with a connecting plate, and the end of the connecting plate away from the connecting rod is fixedly connected with a pressing rod.

[0013] Further, the top of the push plate is fixedly connected to the output shaft of the hydraulic cylinder, the outer wall of the connecting rod is slidably connected in the inside of the connecting block, and the end of the second spring away from the paint box is fixedly connected to the bottom of the connecting block.

[0014] Further, the inside of the paint tank is fixedly connected with a first connecting hose, and the end of the first connecting hose away from the paint tank is in communication with the inside of the paint box.

[0015] Further, the ash cleaning mechanism comprises a pressing plate, a slide rod is slidably connected in the pressing plate, a fourth spring is fixedly connected to the bottom of the slide rod and a position corresponding to the outer wall of the slide rod, a clamping hole is formed in the top of the pressing plate, an air bag is fixedly connected to the top of the pressing plate, a second connecting hose is fixedly connected to the inside of the air bag, a ventilation frame is fixedly connected to the end of the second connecting hose away from the air bag, a plurality of air holes are fixedly connected to the bottom of the ventilation frame, and the end of the second connecting hose away from the air bag penetrates into the inside of the ventilation frame.

[0016] Further, the end of the slide rod away from the pressing plate is fixedly connected to the top of the bottom plate, and the end of the fourth spring away from the pressing plate is fixedly connected to the top of the bottom plate.

[0017] Further, the end of the slide rod away from the pressing plate is fixedly connected to the top of the bottom plate, and the end of the fourth spring away from the pressing plate is fixedly connected to the top of the bottom plate.

[0018] Further, the end of the slide rod away from the pressing plate is fixedly connected to the top of the bottom plate, and the end of the fourth spring away from the pressing plate is fixedly connected to the top of the bottom plate.

[0019] Further, the end of the slide rod away from the pressing plate is fixedly connected to the top of the bottom plate, and the end of the fourth spring away from the pressing plate is fixedly connected to the top of the bottom plate.

[0020] Compared with the prior art, the above-mentioned scheme has the following beneficial effects:

[0021] 1. When a crack is detected and needs to be marked, the hydraulic cylinder is driven to move the push plate downward, and the push plate moves the paint box downward. When the paint box moves to a certain distance, the paint block contacts the road surface, and then the paint block is extruded, and then the paint block slides into the inside of the paint box. The paint for marking in the paint box flows out onto the road surface through the first and second slots, thereby completing the marking of the surrounding of the crack, avoiding the need for manual marking while detecting, and further improving the detection speed.

[0022] 2. During the crack marking process, the downward movement of the paint box will cause the ventilation frame to move downwards simultaneously. As the connecting rod moves downwards, it will press down on the pressure plate, causing the pressure plate to compress the tops of multiple airbags. This compresses the internal space of the airbags, and the gas inside the airbags will flow into the ventilation frame through the second connecting hose. The gas will then be sprayed out through the air holes onto the road surface below the paint box, blowing away dust. This improves the marking effect of the paint on the road surface during subsequent crack marking, preventing excessive dust from making the markings indistinct. Attached Figure Description

[0023] Figure 1 This is a flowchart of the detection process proposed in this invention;

[0024] Figure 2 This is a schematic diagram of the overall structure proposed in this invention;

[0025] Figure 3 This is a schematic diagram of the overall bottom view structure proposed in this invention;

[0026] Figure 4 This is a schematic diagram of the structural connection of the marking mechanism proposed in this invention;

[0027] Figure 5 This is a partial structural cross-sectional view of the marking mechanism proposed in this invention;

[0028] Figure 6 This is a schematic diagram of the structural connection of the dust removal mechanism proposed in this invention;

[0029] Figure 7 This is a partial structural connection cross-sectional view proposed in this invention.

[0030] The labels in the attached diagram are as follows: 1. Base plate; 2. Paint box; 3. Connecting block; 4. Marking mechanism; 5. Dust removal mechanism; 6. First connecting hose; 7. Mounting bracket; 8. Hydraulic cylinder; 9. Fixing plate; 10. First spring; 11. Buffer plate; 12. Detection component; 13. Alarm; 14. Push rod; 15. Switch button; 16. Roller; 401. Push plate; 402. Connecting rod; 403. Paint box; 404. Second spring; 405. Paint block; 406. Third spring; 407. First slot; 408. Second slot; 409. Connecting plate; 410. Support rod; 501. Pressure plate; 502. Slide rod; 503. Fourth spring; 504. Locking hole; 505. Airbag; 506. Second connecting hose; 507. Vent frame; 508. Air hole. Detailed Implementation

[0031] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "top surface", "bottom surface" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the position or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only used to distinguish entities or operations from each other, and do not require or imply any actual relationship, order or relative importance between them.

[0033] Embodiment one, please refer to Figures 1-2 A road and bridge crack detection method, as follows:

[0034] Before the detection of the road bridge, first add the paint for marking into the inside of the paint tank 2, then the paint will flow into the inside of the paint box 403 through the first connecting hose 6, when using the detection device to detect the road bridge pavement, first place the device at one end of the road bridge, the detection personnel start the device and the detection assembly 12 installed at the bottom of the base plate 1, then the detection personnel pushes the push rod 14, so that the device can move forward through the roller 16, the detection assembly 12 can detect whether there is a crack in the moving process, then when the detection assembly 12 detects a crack, the alarm 13 will issue a prompt sound at this time, which can timely notify the detection personnel, then the detection personnel can mark the crack, at this time the detection assembly 12 is located directly above the crack, at this time the detection personnel stops pushing the push rod 14, then when the crack needs to be marked, press the push rod 14 to drive the hydraulic cylinder 8, the top of the push plate 401 is fixedly connected to the output shaft of the hydraulic cylinder 8, the outer wall of the connecting rod 402 penetrates and slidably connects into the inside of the connecting block 3, the second spring 404 is fixedly connected to the bottom of the connecting block 3 away from the paint box 403, then the output shaft of the hydraulic cylinder 8 drives the push plate 401 to move downward, then the push plate 401 drives the connecting rod 402 to slide along the inner wall of the connecting block 3, at the same time the push plate 401 drives the paint box 403 to move downward, at the same time the second spring 404 is stretched, so that the crack corresponds to the center position of the paint box 403, then when the paint box 403 moves to a certain distance, the paint block 405 contacts the road surface at this time, then the paint block 405 is extruded, then the paint block 405 slides to the inside of the paint box 403, at the same time the third spring 406 is compressed, then when the paint block 405 slides to a certain distance, the paint for marking in the inside of the paint box 403 flows to the side wall position of the paint block 405 through the first slot 407, then the paint flows out to the road surface through the second slot 408, so as to complete the marking of the surrounding of the crack, after completing the marking of a crack, at this time the driving hydraulic cylinder 8 stops output, then the force generated by the stretching of the second spring 404 drives the paint box 403 to move upward, the paint box 403 drives the connecting rod 402 to slide upward along the inner wall of the connecting block 3, when the paint block 405 is separated from the road surface, the elastic force of the third spring 406 drives the paint block 405 to slide back to the inside of the paint box 403, after the sliding is completed, at this time the side wall of the first slot 407 is attached to the inner wall of the paint box 403, at the same time the second slot 408 is separated from the inner wall of the paint box 403, so as to stop the paint in the inside of the paint box 403 from flowing out, then the paint box 403 resets to the initial position, then subsequent detection can be carried out;

[0035] When the crack is detected and needs to be marked, the push plate 401 is driven to move downward by the hydraulic cylinder 8, and the paint box 403 is also moved downward by the push plate 401. When the paint box 403 moves to a certain distance, the paint block 405 contacts the road surface, and then the paint block 405 is extruded, and then the paint block 405 slides to the inside of the paint box 403. The paint in the paint box 403 for marking flows out to the road surface through the first slot 407 and the second slot 408, thereby completing the marking of the surrounding of the crack, avoiding the manual marking while detecting, and further improving the detection speed.

[0036] When the crack is marked, the air frame 507 is simultaneously moved downward during the downward movement of the paint box 403, and then the connecting plate 409 drives the abutting rod 410 to move downward synchronously through the connecting rod 402. The bottom end of the abutting rod 410 is attached to the inner wall of the clamping hole 504, and then the pressing plate 501 is simultaneously moved downward during the downward movement of the connecting rod 402. The end of the slide rod 502 away from the pressing plate 501 is fixedly connected to the top of the bottom plate 1, and the end of the fourth spring 503 away from the pressing plate 501 is fixedly connected to the top of the bottom plate 1. Then the pressing plate 501 slides along the outer wall of the fourth spring 503, and the fourth spring 503 is extruded, so that the pressing plate 501 extrudes the top of the plurality of air bags 505. Then the internal space of the air bag 505 is extruded, and then the gas in the air bag 505 flows into the air frame 507 through the second connecting hose 506. Then the gas is sprayed to the road surface position below the paint box 403 through the air hole 508, so that the dust on the road surface is blown away, and the marking effect of the paint on the road surface is improved, and the mark is not obvious due to too much dust on the road surface. Then, after the crack marking is completed, the air frame 507 is simultaneously reset by the reset process of the paint box 403, and when the abutting rod 410 is separated from the inner wall of the clamping hole 504, the fourth spring 503 is reset by the elastic force, and then the pressing plate 501 slides upward along the inner wall of the slide rod 502, and the pressing plate 501 stretches the top of the air bag 505, so that the internal space of the air bag 505 is enlarged, thereby achieving the gas storage effect. Because the reset process of the paint box 403 by the elastic force of the second spring 404 is too fast, the first spring 10 is arranged to buffer the elastic force of the second spring 404, so as to ensure the stability of the paint box 403 and the air frame 507 during the reset process.

[0037] Please refer to Figures 1-2The embodiment also provides a road and bridge crack detection device, which comprises a bottom plate 1, a paint box 2 is fixedly connected to the top of the bottom plate 1, a connecting block 3 is fixedly connected to the side wall of the paint box 2, a mounting rack 7 is fixedly connected to the top of the paint box 2, a hydraulic cylinder 8 is fixedly installed in the mounting rack 7, a marking mechanism 4 is arranged on the output shaft of the hydraulic cylinder 8, a detection assembly 12 is fixedly installed at the bottom of the bottom plate 1, an alarm 13 is fixedly installed at the top of the paint box 2, a push rod 14 is fixedly connected to the top of the bottom plate 1, a switch button 15 is fixedly installed on the outer wall of the push rod 14, and a roller 16 is fixedly installed at the bottom of the bottom plate 1.

[0038] When the detection device is used to detect the road and bridge pavement, first, the device is placed at one end of the road and bridge, the detection personnel starts the device and the detection assembly 12 installed at the bottom of the bottom plate 1, then the detection personnel pushes the push rod 14, so that the device can move forward through the roller 16, and whether the road and bridge have cracks can be detected through the detection assembly 12 in the moving process, then when the detection assembly 12 detects cracks, a prompt sound is emitted through the alarm 13 at this time, so that the detection personnel can be notified in time, then the detection personnel can mark the cracks.

[0039] Embodiment two, please refer to Figures 2-4 On the basis of embodiment one, in the embodiment, the marking mechanism 4 comprises a paint box 403, so that the position of the crack can be marked when the crack is detected, a connecting rod 402 is fixedly connected to the top of the paint box 403, a push plate 401 is fixedly connected to the top of the connecting rod 402, a second spring 404 is fixedly connected to the position corresponding to the outer wall of the connecting rod 402 at the top of the paint box 403, a plurality of paint blocks 405 are slidably connected to the inner wall of the paint box 403, a third spring 406 is fixedly connected to the top of each of the plurality of paint blocks 405, the third spring 406 is fixedly connected to the inner wall of the paint box 403 at the end away from the paint block 405, a first slot 407 is formed through the top of the paint block 405, a second slot 408 is formed in the outer wall of the paint block 405, a connecting plate 409 is fixedly connected to the outer wall of the connecting rod 402, a resisting rod 410 is fixedly connected to the end away from the connecting rod 402 of the connecting plate 409, a first connecting hose 6 is fixedly connected to the inside of the paint box 2, and the end away from the paint box 2 of the first connecting hose 6 and the inside of the paint box 403 are in communication.

[0040] Before the detection of the road bridge, first the paint for marking is added to the inside of the paint box 2, then the paint will flow into the inside of the paint box 403 through the first connecting hose 6, and then in the detection process, when the detection assembly 12 detects the crack, at this time the detection assembly 12 is located directly above the crack, at this time the detection personnel stop pushing the push rod 14, then when the crack needs to be marked, the hydraulic cylinder 8 is driven by pressing the push rod 14, the top of the push plate 401 is fixedly connected to the output shaft of the hydraulic cylinder 8, the outer wall of the connecting rod 402 is slidingly connected in the inside of the connecting block 3, the second spring 404 is fixedly connected to the bottom of the connecting block 3 away from the paint box 403, then the output shaft of the hydraulic cylinder 8 drives the push plate 401 to move downward, then the push plate 401 drives the connecting rod 402 to slide along the inner wall of the connecting block 3, and the push plate 401 drives the paint box 403 to move downward, and the second spring 404 is stretched, so that the crack corresponds to the center position of the paint box 403, then when the paint box 403 moves to a certain distance, at this time the paint block 405 contacts the road surface, then the paint block 405 is extruded, and then the paint block 405 slides to the inside of the paint box 403, and the third spring 406 is compressed, then when the paint block 405 slides to a certain distance, at this time the paint for marking in the inside of the paint box 403 flows to the side wall position of the paint block 405 through the first slot 407, then the paint flows out to the road surface through the second slot 408, so that the marking of the surrounding of the crack is completed, after completing the marking of a crack, at this time the driving hydraulic cylinder 8 stops output, then the force generated by the stretching of the second spring 404 drives the paint box 403 to move upward, and the paint box 403 drives the connecting rod 402 to slide upward along the inner wall of the connecting block 3, when the paint block 405 is separated from the road surface, the elastic force of the third spring 406 drives the paint block 405 to slide back to the inside of the paint box 403, after sliding, at this time the side wall of the first slot 407 is attached to the inner wall of the paint box 403, and the second slot 408 is separated from the inner wall of the paint box 403, so that the paint in the inside of the paint box 403 is stopped flowing out, then the paint box 403 is reset to the initial position, then the subsequent detection can be carried out.

[0041] Example three, please refer to Figure 3 , Figure 5 and Figure 6On the basis of embodiment two, in this embodiment, the top of the paint box 403 is provided with a dust cleaning mechanism 5 to clean the marking position before marking the cracks, the dust cleaning mechanism 5 comprises a pressing plate 501, a sliding rod 502 is slidably connected through the inside of the pressing plate 501, the bottom of the sliding rod 502 is fixedly connected with the fourth spring 503 corresponding to the position of the outer wall of the sliding rod 502, the top of the pressing plate 501 is provided with a clamping hole 504, the top of the pressing plate 501 is fixedly connected with an air bag 505, the inside of the air bag 505 is fixedly connected with a second connecting hose 506, one end of the second connecting hose 506 away from the air bag 505 is fixedly connected with a ventilation frame 507, the bottom of the ventilation frame 507 is fixedly connected with a plurality of air holes 508, one end of the second connecting hose 506 away from the air bag 505 penetrates into the inside of the ventilation frame 507, the top of the fixed plate 9 is fixedly connected with the top of the paint box 403, the top of the fixed plate 9 is fixedly connected with the first spring 10, one end of the first spring 10 away from the fixed plate 9 is fixedly connected with the buffer plate 11.

[0042] When the crack is marked, the air frame 507 is lowered synchronously during the downward movement of the paint box 403, the end of the abutting rod 410 away from the connecting plate 409 corresponds to the inner wall of the clamping hole 504, the bottom of the air frame 507 is fixedly connected to the top of the paint box 403, then the connecting plate 409 drives the abutting rod 410 to move downward synchronously through the connecting rod 402, then the bottom end of the abutting rod 410 is attached to the inner wall of the clamping hole 504, then the pressure plate 501 is lowered synchronously during the downward movement of the connecting rod 402, the end of the sliding rod 502 away from the pressure plate 501 is fixedly connected to the top of the bottom plate 1, the end of the fourth spring 503 away from the pressure plate 501 is fixedly connected to the top of the bottom plate 1, then the pressure plate 501 slides along the outer wall of the fourth spring 503, simultaneously extruding the fourth spring 503, so that the pressure plate 501 extrudes the top of the plurality of air bags 505, then the internal space of the plurality of air bags 505 is extruded, then the gas in the air bag 505 flows into the air frame 507 through the second connecting hose 506, then the gas is sprayed to the road surface position below the paint box 403 through the air hole 508, so that the dust on the road surface is blown away, and the marking effect of the paint on the road surface is improved, and the marking mark is not obvious due to too much dust on the road surface, then after the crack marking is completed, the air frame 507 is reset synchronously through the reset process of the paint box 403, and when the abutting rod 410 is separated from the inner wall of the clamping hole 504, the fourth spring 503 is reset by the elastic force, then the pressure plate 501 slides upward along the inner wall of the sliding rod 502, and the pressure plate 501 stretches the top of the air bag 505, so that the internal space of the air bag 505 is enlarged, thereby achieving the function of storing gas, and the stability of the paint box 403 and the air frame 507 during the reset process is ensured by buffering the elastic force of the second spring 404 through the first spring 10.

[0043] It should be noted that the devices in the present application are common market devices, which can be selected according to needs during specific use, and the circuit connection relationship of each device is a simple series and parallel connection circuit, and there is no innovation point in the circuit connection part, and a person skilled in the art can easily realize it, which belongs to the prior art and will not be described in detail.

[0044] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and therefore the protection scope of the present application should be subject to the range defined by the claims.

Claims

1. A method for detecting a crack of a road bridge, characterized by, It comprises the following steps: S1: detection construction: the detection personnel pushes the push rod (14) to move forward through the roller (16), and detects whether there is a crack in the road bridge in the moving process through the detection assembly (12), and then when the detection assembly (12) detects a crack, an alarm (13) is used to issue a prompt sound to timely notify the detection personnel, and then the detection personnel marks the crack; S2: crack marking; the push plate (401) is driven by the driving hydraulic cylinder (8) to move downward, and the push plate (401) drives the paint block (405) to move downward, then the paint block (405) contacts the road surface, and then the paint block (405) is extruded, and the paint for marking is flowed out to the road surface through the first slot (407) and the second slot (408), and the surrounding of the crack is marked; S3: auxiliary dust removal: the air frame (507) is driven to move downward by the downward movement of the paint block (405), and the connecting rod (402) moves downward, so that the pressing rod (410) presses the pressing plate (501), the pressing plate (501) extrudes the top of the plurality of air bags (505), the internal space of the plurality of air bags (505) is extruded, then the gas in the air bag (505) flows into the inside of the air frame (507) through the second connecting hose (506), then the gas is sprayed to the road surface position below the paint block (405) through the air hole (508), the dust on the road surface is blown away, and the marking effect of the paint on the road surface is improved, and the marking mark is not obvious due to too much dust on the road surface; It comprises a bottom plate (1), a paint tank (2) is fixedly connected to the top of the bottom plate (1), and a connecting block (3) is fixedly connected to the side wall of the paint tank (2). The top of the paint tank (2) is fixedly connected with a mounting bracket (7), and a hydraulic cylinder (8) is fixedly installed in the inside of the mounting bracket (7). The output shaft of the hydraulic cylinder (8) is provided with a marking mechanism (4); The marking mechanism (4) comprises a paint box (403) for marking the position of the crack when the crack is detected; The top of the paint box (403) is provided with a dust removal mechanism (5) for dust removal at the marking position before marking the crack; The top of the paint box (403) is fixedly connected with a connecting rod (402), the push plate (401) is fixedly connected at the top of the connecting rod (402), the top of the paint box (403) is fixedly connected with a second spring (404) at a position corresponding to the outer wall of the connecting rod (402), a plurality of paint blocks (405) are slidably connected to the inner wall of the paint box (403), a third spring (406) is fixedly connected to the top of each of the paint blocks (405), the end of the third spring (406) away from the paint block (405) is fixedly connected to the inner wall of the paint box (403), a first slot (407) is formed in the top of the paint block (405), a second slot (408) is formed in the outer wall of the paint block (405), the outer wall of the connecting rod (402) is fixedly connected with a connecting plate (409), and a resisting rod (410) is fixedly connected to one end of the connecting plate (409). The top of the push plate (401) is fixedly connected to the output shaft of the hydraulic cylinder (8), the outer wall of the connecting rod (402) is slidably connected in the connecting block (3), and the end of the second spring (404) away from the paint box (403) is fixedly connected to the bottom of the connecting block (3). The inside of the paint tank (2) is fixedly connected with a first connecting hose (6), and the end of the first connecting hose (6) away from the paint tank (2) is in communication with the inside of the paint box (403). The ash removal mechanism (5) comprises a sliding rod (502), the outer wall of the sliding rod (502) is slidably connected in the inside of the pressing plate (501), the bottom of the sliding rod (502) is fixedly connected with a fourth spring (503) at a position corresponding to the outer wall of the sliding rod (502), the top of the pressing plate (501) is provided with a clamping hole (504), the air bag (505) is fixedly connected to the top of the pressing plate (501), the second connecting hose (506) is fixedly connected to the inside of the air bag (505), the air passage frame (507) is fixedly connected to the end of the second connecting hose (506), a plurality of air holes (508) are fixedly connected to the bottom of the air passage frame (507), and the end of the second connecting hose (506) away from the air bag (505) penetrates into the inside of the air passage frame (507).

2. The method of claim 1, wherein, The end of the sliding rod (502) away from the pressing plate (501) is fixedly connected to the top of the bottom plate (1), and the end of the fourth spring (503) away from the pressing plate (501) is fixedly connected to the top of the bottom plate (1).

3. The method of claim 2, wherein the step of detecting the crack of the road bridge is characterized by, The end of the resisting rod (410) away from the connecting plate (409) corresponds to the inner wall of the clamping hole (504), and the bottom of the air passage frame (507) is fixedly connected to the top of the paint box (403).

4. The method of claim 1, wherein, The top of the paint box (403) is fixedly connected with a fixed plate (9), and the top of the fixed plate (9) is fixedly connected with a first spring (10), and the end, away from the fixed plate (9), of the first spring (10) is fixedly connected with a buffer plate (11).

5. The method of claim 1, wherein, The detection assembly (12) is fixedly installed at the bottom of the bottom plate (1), the alarm (13) is fixedly installed at the top of the paint box (2), the push rod (14) is fixedly connected at the top of the bottom plate (1), and the outer wall of the push rod (14) is fixedly installed with a switch button (15), and the roller (16) is fixedly installed at the bottom of the bottom plate (1).

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