A bridge deck inspection device

Abstract

This invention discloses a bridge deck inspection device, belonging to the technical field of bridge deck inspection equipment. The device includes a vehicle body, a measuring frame, and an inspection component mounted on the measuring frame. The inspection component includes an inspection housing, a marking component, and a measuring component. The measuring frame is slidably connected to the vehicle body bridge frame via a top balance ball, which can counteract vehicle tilt to maintain a horizontal inspection state. The marking component adopts a pneumatic control design of an air chamber and a pigment nozzle, requiring no additional power. It can automatically mark defects by using the air pressure generated by the slider squeezing the air chamber to push the pigment out. The feedback rod group of the measuring component can convert the small displacement of the measuring wheel into slider action, and the detection threshold can be changed by adjusting the knob to adapt to different bridge deck requirements. The movement of the vehicle body drives the measuring wheel to detect bridge deck depressions or bulges, simultaneously triggering the marking component to leave a pigment mark, intuitively reflecting the location and degree of the defect, facilitating subsequent repair.

Description

Technical Field

[0001] This invention belongs to the field of bridge inspection technology, specifically referring to a bridge deck inspection device. Background Technology

[0002] As a core component of transportation infrastructure, bridges bear vehicle loads and environmental erosion over long periods of time, making them prone to structural defects such as dents and bulges. Timely detection and repair of these defects are crucial to ensuring driving safety.

[0003] Existing inspection technologies have significant drawbacks. Manual inspection is the most common method, relying mainly on visual observation and segment-by-segment measurement with handheld tools. This method is time-consuming and lacks accuracy, easily missing even minor defects. Furthermore, subsequent manual marking carries the risk of positional errors. Existing semi-automated equipment requires external electrical or hydraulic power, resulting in poor stability in field operations and high maintenance costs. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a bridge deck inspection device, which effectively solves the above problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a bridge deck inspection device, including a measuring frame, a vehicle body and an inspection component, wherein the inspection component is disposed on the measuring frame and the measuring frame is disposed at the bottom of the vehicle body; The detection assembly includes a detection housing, a marking assembly, and a measuring assembly. The marking assembly is located inside the detection housing, the measuring assembly is located at the bottom of the detection housing, and the detection housing is mounted on a measuring frame.

[0006] Furthermore, the left side of the detection housing is provided with a spray irrigation trough and an air chamber trough, the air chamber trough is located above the spray irrigation trough, the slider trough is located at the top right side of the detection housing, the slider trough is provided below a one-way valve trough, the bottom right side of the detection housing is provided with a wheel arm rotating seat, and the top of the detection housing is provided with a positioning screw.

[0007] Furthermore, the bottom of the irrigation trough is provided with an irrigation positioning groove, the top outer wall of the irrigation trough is provided with a wedge sliding groove, the center of the outer wall of the slider groove is provided with a side wall groove, the upper and lower walls of the slider groove are symmetrically provided with one-way valve holes, and the connecting wall plate of the slider groove and the air chamber groove is symmetrically provided with through holes at the top and bottom.

[0008] Furthermore, the marking assembly includes an air chamber, a pigment nozzle, a one-way valve, and a limiting wedge. The air chamber is located in an air chamber groove, the pigment nozzle is located in a spraying groove, the one-way valve is located in a one-way valve groove, and the limiting wedge is located in a wedge groove.

[0009] Furthermore, the air chamber includes an air chamber shell and a butterfly valve plate. The butterfly valve plate is located inside the air chamber shell. The side wall of the air chamber shell is symmetrically provided with air inlets. The bottom of the air chamber shell is provided with an air outlet. The butterfly valve plate is located at the air inlets. The limiting wedge is stuck at the bottom of the air chamber shell.

[0010] Furthermore, the pigment spray pipe includes a pipe body and a propulsion cone, the propulsion cone is disposed in the pipe body, the top of the pipe body is provided with a vent pipe, the vent pipe is disposed in an air outlet, the bottom of the pipe body is provided with a nozzle, the bottom side wall of the pipe body is provided with a side wall plate, and the side wall plate is disposed in the spray positioning groove.

[0011] Preferably, the air control design combining the air chamber and the pigment nozzle is adopted. No additional power source is required. The air pressure generated by the slider squeezing the air chamber can drive the propellant cone to spray pigment, achieving the technical effect of automatic marking when an abnormality is detected, avoiding the delay and error of manual marking.

[0012] Furthermore, the measuring assembly includes a slider, a feedback rod assembly, a wheel arm, and a measuring wheel. The slider is disposed in a slider groove, the wheel arm is disposed on a wheel arm rotating seat, one end of the feedback rod assembly is connected to the slider, the other end of the feedback rod assembly is connected to the wheel arm, the measuring wheel is disposed at the end of the wheel arm, a top rod connecting seat is provided at the center of the slider, the top rod connecting seat slides in a side wall groove, and a bottom rod connecting seat is provided at the center of the wheel arm.

[0013] Furthermore, the feedback rod assembly includes a top rod, a bottom rod, and an adjustment knob. The top of the top rod is mounted on a top rod connecting seat, and the bottom of the top rod has an adjustment groove. Knob plates are provided on both sides of the adjustment groove, and the outer knob plate has a bottom rod hole. The bottom rod is located in the bottom rod hole, and the bottom of the bottom rod is mounted on a bottom rod connecting seat. The top of the bottom rod has a bottom rod plate, which is located in the adjustment groove. The adjustment knob is located on the knob plate, and the adjustment knob and the knob plate are connected by threads. The top of the bottom rod is detachable, making it easy for the bottom rod to be inserted into the bottom rod hole.

[0014] Preferably, the feedback rod assembly, through the combination of the top rod, the bottom rod and the adjustment knob, converts the minute displacement of the measuring wheel into the linkage action of the slider, resulting in high detection sensitivity. Furthermore, rotating the adjustment knob can change the detection threshold, allowing for flexible adjustment according to the detection needs of different bridge surfaces, such as newly built bridge surfaces and old bridge surfaces, thus demonstrating strong adaptability.

[0015] Furthermore, the measuring frame includes a main rod and a crossbar. The crossbar is symmetrically arranged on both sides of the main rod. The top of the main rod is symmetrically provided with a balance ball, which is located on the vehicle body. Mounting plates are symmetrically provided at both ends of the crossbar, and the positioning screw is located on the mounting plate.

[0016] Preferably, the structural design of the balance ball and bridge effectively counteracts the interference of vehicle tilt on the detection. When the vehicle tilts due to uneven bridge surface, the balance ball at the top of the measuring frame slides on the bridge of the vehicle. Combined with the weight of the measuring frame and the detection components, the measuring frame is always kept horizontal, avoiding insufficient contact between the measuring wheels and the bridge surface due to vehicle tilt, thus ensuring the accuracy of the dent and bulge detection data from the source.

[0017] Furthermore, the front end of the vehicle body is provided with a traction ring, the rear end of the vehicle body is provided with a push rod, the center of the vehicle body is provided with a bridge, the balance ball slides on the bridge, and the underside of the vehicle body is provided with a travel wheel.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows: 1. The air control design combines an air chamber and a pigment spray nozzle, eliminating the need for an additional power source. The air pressure generated by the slider squeezing the air chamber can propel the propellant cone to spray pigment, achieving the technical effect of automatic marking upon detection of abnormalities, thus avoiding the delays and errors of manual marking.

[0019] 2. The feedback rod assembly, through the combination of the top rod, bottom rod, and adjustment knob, converts the minute displacement of the measuring wheel into the linkage action of the slider, resulting in high detection sensitivity. Furthermore, rotating the adjustment knob can change the detection threshold, allowing for flexible adjustment according to the detection needs of different bridge surfaces, such as newly built bridge surfaces and old bridge surfaces, demonstrating strong adaptability.

[0020] 3. The structural design of the balance ball and bridge effectively counteracts the interference of vehicle tilt on the inspection. When the vehicle tilts due to uneven bridge surface, the balance ball at the top of the measuring frame slides on the bridge of the vehicle. Combined with the weight of the measuring frame and the inspection components, the measuring frame is always kept horizontal, avoiding insufficient contact between the measuring wheels and the bridge surface due to vehicle tilt, thus ensuring the accuracy of dent and bulge detection data from the source. Attached Figure Description

[0021] Figure 1 This is a perspective view of a bridge deck inspection device proposed in this invention; Figure 2 This is a right view of a bridge deck inspection device proposed in this invention; Figure 3 for Figure 2 A cross-sectional view along the cutting line AA; Figure 4 This is a perspective view of the detection components of a bridge deck inspection device proposed in this invention; Figure 5 This is an anatomical diagram of the detection component of a bridge deck inspection device proposed in this invention; Figure 6 This is a left view of the detection component of a bridge deck detection device proposed in this invention; Figure 7 for Figure 6 A cross-sectional view along the cutting line BB; Figure 8 This is a schematic diagram of the detection housing of a bridge deck detection device proposed in this invention; Figure 9 for Figure 7 A magnified view of a section at point I; Figure 10 This is a schematic diagram of the feedback rod assembly of a bridge deck detection device. Figure 11 This is a partial structural diagram of the mounting plate of a bridge deck inspection device.

[0022] The components include: 1. Detection housing; 11. Sprinkler trough; 111. Sprinkler positioning trough; 112. Wedge slide; 12. Air chamber trough; 13. Slider trough; 131. Side wall trough; 132. One-way valve hole; 133. Through hole; 14. One-way valve trough; 15. Wheel arm rotating seat; 16. Positioning screw; 2. Marking assembly; 21. Air chamber; 211. Air chamber shell; 212. Air inlet valve; 213. Air outlet; 214. Butterfly valve plate; 22. Pigment spray pipe; 221. Pipe body; 222. Vent pipe; 223. Side wall plate; 224. Nozzle; 225. Propulsion cone; 23. 24. One-way valve, 3. Limit wedge, 4. Measuring assembly, 5. Slider, 6. Top rod connecting seat, 7. Feedback rod assembly, 8. Top rod, 9. Adjustment groove, 10. Knob plate, 11. Bottom rod hole, 12. Bottom rod, 13. Bottom rod plate, 14. Adjustment knob, 15. Wheel arm, 16. Bottom rod connecting seat, 17. Measuring wheel, 18. Measuring frame, 19. Main rod, 10. Balance ball, 11. Crossbar, 12. Mounting plate, 13. Car body, 14. Pull ring, 15. Hand push rod, 16. Bridge frame, 17. Traveling wheel, 18. Detection assembly.

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] like Figures 1-11 As shown, the present invention proposes a bridge deck inspection device, including a measuring frame 4, a vehicle body 5 and an inspection component 6, wherein the inspection component 6 is disposed on the measuring frame 4 and the measuring frame 4 is disposed at the bottom of the vehicle body 5; The detection component 6 includes a detection housing 1, a marking component 2, and a measuring component 3. The marking component 2 is located inside the detection housing 1, the measuring component 3 is located at the bottom of the detection housing 1, and the detection housing 1 is located on the measuring frame 4.

[0027] The left side of the detection housing 1 is provided with a spray irrigation trough 11 and an air chamber trough 12. The air chamber trough 12 is located above the spray irrigation trough 11. The slider trough 13 is located at the top right side of the detection housing 1. The one-way valve trough 14 is located below the slider trough 13. The bottom right side of the detection housing 1 is provided with a wheel arm rotating seat 15. The top of the detection housing 1 is provided with a positioning screw 16.

[0028] The bottom of the sprinkler trough 11 is provided with a sprinkler positioning groove 111, the top outer wall of the sprinkler trough 11 is provided with a wedge sliding groove 112, the center of the outer wall of the slider groove 13 is provided with a side wall groove 131, the upper and lower walls of the slider groove 13 are symmetrically provided with one-way valve holes 132, and the connecting wall plate between the slider groove 13 and the air chamber groove 12 is symmetrically provided with through holes 133.

[0029] The marking component 2 includes an air chamber 21, a pigment spray pipe 22, a one-way valve 23, and a limiting wedge 24. The air chamber 21 is located in the air chamber groove 12, the pigment spray pipe 22 is located in the spraying groove 11, the one-way valve 23 is located in the one-way valve groove 14, and the limiting wedge 24 is located in the wedge slide groove 112.

[0030] The air chamber 21 includes an air chamber shell 211 and a butterfly valve plate 214. The butterfly valve plate 214 is located inside the air chamber shell 211. The side wall of the air chamber shell 211 is symmetrically provided with an air inlet valve 212. The bottom of the air chamber shell 211 is provided with an air outlet 213. The butterfly valve plate 214 is located at the air inlet valve 212. The limiting wedge 24 is stuck at the bottom of the air chamber shell 211.

[0031] The end of the limiting wedge 24 is locked to the bottom of the air chamber shell 211 to fix the installation position of the air chamber 21 in the air chamber groove 12, so as to prevent the air chamber 21 from shifting during device vibration and movement, and to ensure that the air outlet 213 of the air chamber 21 is precisely connected to the air pipe 222 of the pigment spray pipe 22, ensuring smooth air passage and reliable pigment spraying action; pushing the limiting wedge 24 downward can release the limiting of the air chamber shell 211, realizing the quick assembly and disassembly of the air chamber 21.

[0032] The pigment spray pipe 22 includes a pipe body 221 and a propulsion cone 225. The propulsion cone 225 is located inside the pipe body 221. The top of the pipe body 221 is provided with a vent pipe 222, which is located in an air outlet 213. The bottom of the pipe body 221 is provided with a nozzle 224. The bottom side wall of the pipe body 221 is provided with a side wall plate 223, which is located inside the spray positioning groove 111.

[0033] The side wall plate 223 and the spray positioning groove 111 are in a sliding engagement. When the pigment spray pipe 22 is disassembled or assembled, the side wall plate 223 slides in or out along the spray positioning groove 111 to achieve the positioning and assembly of the pigment spray pipe 22 and the detection housing 1. At the same time, it prevents the pigment spray pipe 22 from shaking or shifting during the movement of the detection device, and ensures that the nozzle 224 is always vertically aligned with the bridge surface, thus ensuring the accurate position of the pigment mark.

[0034] The measuring component 3 includes a slider 31, a feedback rod assembly 32, a wheel arm 33, and a measuring wheel 34. The slider 31 is located in the slider groove 13, the wheel arm 33 is located on the wheel arm rotating seat 15, one end of the feedback rod assembly 32 is connected to the slider 31, and the other end of the feedback rod assembly 32 is connected to the wheel arm 33. The measuring wheel 34 is located at the end of the wheel arm 33. The slider 31 has a top rod connecting seat 311 at its center, which slides in the side wall groove 131. The wheel arm 33 has a bottom rod connecting seat 331 at its center.

[0035] The feedback rod assembly 32 includes a top rod 321, a bottom rod 325, and an adjustment knob 327. The top of the top rod 321 is mounted on the top rod connecting seat 311, and the bottom of the top rod 321 is provided with an adjustment groove 322. The adjustment groove 322 is provided with knob plates 323 on both sides, and the outer knob plate 323 is provided with a bottom rod hole 324. The bottom rod 325 is located in the bottom rod hole 324, and the bottom of the bottom rod 325 is mounted on the bottom rod connecting seat 331. The top of the bottom rod 325 is provided with a bottom rod plate 326, which is located in the adjustment groove 322. The adjustment knob 327 is located on the knob plate 323, and the adjustment knob 327 is connected to the knob plate 323 by a thread.

[0036] The measuring frame 4 includes a main rod 41 and a crossbar 42. The crossbar 42 is symmetrically arranged on both sides of the main rod 41. The top of the main rod 41 is symmetrically provided with a balance ball 411. The balance ball 411 is provided on the vehicle body 5. The two ends of the crossbar 42 are symmetrically provided with mounting plates 421. The positioning screw 16 is provided on the mounting plate 421.

[0037] The front end of the vehicle body 5 is provided with a traction ring 51, the rear end of the vehicle body 5 is provided with a push rod 52, the center of the vehicle body 5 is provided with a bridge 53, the balance ball 411 slides on the bridge 53, and the underside of the vehicle body 5 is provided with a travel wheel 54.

[0038] In practical use, the testing vehicle is transported to the bridge surface to be tested. The testing personnel can choose to move the vehicle body 5 by pulling it with a power device or by pushing it. As the vehicle body 5 moves slowly forward, it will tilt due to the unevenness of the bridge surface. When the balance ball 411 slides on the bridge frame 53, it can keep the measuring frame 4 in a horizontal state due to the gravity of the measuring frame 4 and the testing component 6. This avoids insufficient contact between the measuring wheel 34 and the bridge surface due to the tilt of the vehicle body, thus ensuring the accuracy of the testing data.

[0039] As the vehicle body 5 moves forward, the measuring wheels 34 on both sides roll on the bridge surface. When the measuring wheels 34 roll to the recessed area, they drop due to their own weight, causing the wheel arm 33 to swing downward. The wheel arm 33 pulls down the bottom rod 325. When the recess reaches a certain level, the bottom rod 325 slides down, and the bottom rod plate 326 pushes the adjustment knob 327 below, which in turn moves the top rod 321 down. The top rod 321 then moves the slider 31 down. During the downward movement of the slider 31, it will squeeze the slider groove 13. The lower air chamber increases the pressure within it, pushing the airflow from the through-hole 133 to the intake valve 212. The airflow drives the butterfly valve 214 to rotate and enters the air chamber 21, increasing the internal pressure. The pressure is then transmitted through the vent pipe 222 on the outlet 213 to the upper end of the tube 221, pushing the propulsion cone 225 downwards. The propulsion cone 225 squeezes the pigment inside the lower tube 221, causing it to spray out from the nozzle 224 and leave a mark on the ground. Simultaneously, the downward movement of the slider 31 increases the volume of the upper air chamber within the slider groove 13, resulting in a decrease in air pressure. Due to this pressure change, the intake valve 212 above the upper air chamber 21 is closed by the butterfly valve 214, forcing the upper one-way valve 23 to open. External airflow can only flow into the air chamber above the slider 31 through this one-way valve 23.

[0040] After the measuring wheel 34 passes over the depression, it returns to the flat bridge surface, thereby resetting the wheel arm 33 and the feedback rod assembly 32. This pushes the slider 31 upward, compressing the air chamber above the slider 31. The airflow flows into the air chamber 21 through the upper air intake 212, pushing the propulsion cone 225 downward and leaving a paint mark on the ground again. The air chamber below the slider 31 is then replenished with gas through the lower one-way valve 23. Similarly, when the measuring wheel 34 passes over a bridge surface protrusion, it will spray two paint marks on the ground. The size and distance of these two paint marks can visually indicate the degree of depression in the bridge surface and facilitate subsequent repairs by construction personnel. Before inspecting the bridge surface, the position of the end of the adjusting knob 327 within the adjusting groove 322 can be adjusted by rotating the adjusting knob 327, i.e., adjusting the distance between the end of the adjusting knob 327 and the bottom rod plate 326, thereby changing the detection threshold of the measuring wheel 34 for bridge surface depressions or protrusions.

[0041] The above is the overall workflow of this invention. Simply repeat this process the next time you use it.

[0042] It should be noted that, in this document, 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 process, method, article, or apparatus.

[0043] 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.

[0044] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A bridge deck inspection device, characterized in that: The device includes a measuring frame (4), a vehicle body (5), and a detection component (6). The detection component (6) is mounted on the measuring frame (4), which is located at the bottom of the vehicle body (5). The detection component (6) includes a detection housing (1), a marking component (2), and a measuring component (3). The marking component (2) is located inside the detection housing (1), and the measuring component (3) is located at the bottom of the detection housing (1). The detection housing (1) is mounted on the measuring frame (4). The detection housing (1) is provided with a spray irrigation trough (11) and an air chamber trough (12) on the left side. The air chamber trough (12) is located above the spray irrigation trough (11). The top right side of the detection housing (1) is provided with a slider trough (13). The bottom of the slider trough (13) is provided with a one-way valve trough (14). The bottom right side of the detection housing (1) is provided with a wheel arm rotating seat (15). The top of the detection housing (1) is provided with a positioning screw (16). The marking assembly (2) includes an air chamber (21), a pigment nozzle (22), a one-way valve (23), and a limiting wedge (24). The air chamber (21) is located in the air chamber groove (12), the pigment nozzle (22) is located in the irrigation groove (11), the one-way valve (23) is located in the one-way valve groove (14), and the limiting wedge (24) is located in the wedge groove (112). The measuring component (3) includes a slider (31), a feedback rod group (32), a wheel arm (33), and a measuring wheel (34). The slider (31) is slidably sealed in the slider groove (13). The wheel arm (33) is rotatably mounted on the wheel arm rotating seat (15). One end of the feedback rod group (32) is connected to the slider (31), and the other end of the feedback rod group (32) is connected to the wheel arm (33). The measuring wheel (34) is rotatably mounted at the end of the wheel arm (33). The slider (31) has a top rod connecting seat (311) at its center, which slides in the side wall groove (131). The wheel arm (33) has a bottom rod connecting seat (331) at its center. The feedback rod assembly (32) includes a top rod (321), a bottom rod (325), and an adjustment knob (327). The top of the top rod (321) is located on a top rod connecting seat (311), and the bottom of the bottom rod (325) is located on a bottom rod connecting seat (331). The bottom of the top rod (321) is provided with an adjustment groove (322). The adjustment groove (322) is provided with knob plates (323) on both sides, and the outer knob plate (323) is provided with a bottom rod hole (324). The bottom rod (325) is slidably located in the bottom rod hole (324). The bottom rod (325) is provided with a bottom rod plate (326) at the top. The bottom rod plate (326) is located in the adjustment groove (322). The adjustment knob (327) is located on the knob plate (323), and the adjustment knob (327) and the knob plate (323) are connected by threads. The measuring frame (4) includes a main rod (41) and a crossbar (42). The crossbar (42) is symmetrically arranged on both sides of the main rod (41). The top of the main rod (41) is symmetrically provided with a balance ball (411). The center of the vehicle body (5) is provided with a bridge frame (53). The balance ball (411) slides on the bridge frame (53) under the gravity of the measuring frame (4). The two ends of the crossbar (42) are symmetrically provided with mounting plates (421). The positioning screw (16) is provided on the mounting plate (421).

2. The bridge deck inspection device according to claim 1, characterized in that: The bottom of the irrigation trough (11) is provided with an irrigation positioning groove (111), the top outer wall of the irrigation trough (11) is provided with a wedge slide groove (112), the center of the outer wall of the slider groove (13) is provided with a side wall groove (131), the upper and lower walls of the slider groove (13) are symmetrically provided with one-way valve holes (132), and the connecting wall plate of the slider groove (13) and the air chamber groove (12) is symmetrically provided with through holes (133).

3. The bridge deck inspection device according to claim 2, characterized in that: The marking component (2) includes an air chamber (21), a pigment nozzle (22), a one-way valve (23), and a limiting wedge (24). The air chamber (21) is located in the air chamber groove (12), the pigment nozzle (22) is located in the spraying groove (11), the one-way valve (23) is located in the one-way valve groove (14), and the limiting wedge (24) is located in the wedge groove (112).

4. The bridge deck inspection device according to claim 3, characterized in that: The air chamber (21) includes an air chamber shell (211) and a butterfly valve plate (214). The air chamber shell (211) is located in the air chamber groove (12), and the butterfly valve plate (214) is located in the air chamber shell (211). The side wall of the air chamber shell (211) is symmetrically provided with an air inlet (212). The bottom of the air chamber shell (211) is provided with an air outlet (213). The butterfly valve plate (214) is located at the air inlet (212), and the limiting wedge (24) is stuck at the bottom of the air chamber shell (211).

5. A bridge deck inspection device according to claim 4, characterized in that: The pigment spray pipe (22) includes a pipe body (221) and a propulsion cone (225). The propulsion cone (225) is located inside the pipe body (221). The top of the pipe body (221) is provided with a vent pipe (222), which is located in an air outlet (213). The bottom of the pipe body (221) is provided with a nozzle (224). The bottom side wall of the pipe body (221) is provided with a side wall plate (223), which is located in the spray positioning groove (111).

6. A bridge deck inspection device according to claim 5, characterized in that: The front end of the vehicle body (5) is provided with a traction ring (51), the rear end of the vehicle body (5) is provided with a push rod (52), the balance ball (411) slides on the bridge frame (53), and the lower side of the vehicle body (5) is provided with a travel wheel (54).

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