A lightweight, long-span bridge beam bottom inspection system

Abstract

This utility model belongs to the field of bridge maintenance and repair technology, specifically relating to a lightweight, long-span bridge beam bottom inspection system. The bridge deck walking device has a horizontally movable cantilever, with a vertically movable ladder at the end of the cantilever, and an installation platform at the end of the ladder. Radial cables connect to the installation platforms of two bridge deck walking devices located on the same side of the bridge deck at both ends. Radial walking devices are movably mounted on their respective radial cables. Zonal cables connect to their respective radial walking devices at both ends. Zonal walking devices are movably mounted on their zonal cables. Inspection cameras are mounted on the zonal walking devices. This utility model utilizes zonal and radial cables to construct an unmanned equipment walking platform on the bridge beam bottom, significantly reducing the load on the bridge deck walking device. By using zonal cables and zonal walking devices to replace trusses and manual inspection, the entire system can be made lighter, reducing system costs and improving safety and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of bridge maintenance technology, specifically relating to a lightweight, long-span bridge beam bottom inspection system. Background Technology

[0002] Currently, there are two main types of inspection platforms for long-span bridges: fixed bridge inspection platforms and mobile bridge inspection platforms. The former utilizes a truss that travels on tracks under the bridge to inspect the bottom of the beams. Because the entire system is permanently installed at the bottom of the bridge, the initial investment is substantial, and it also requires regular maintenance, resulting in high operating and maintenance costs. The latter utilizes a truss suspended by a mobile device (usually an engineering vehicle) traveling on the bridge deck to achieve mobile inspection. It offers better flexibility; however, the truss is suspended under the bridge, constituting high-altitude work, which carries certain risks. Furthermore, the mobile device on the bridge deck occupies lanes, causing traffic inconvenience.

[0003] In addition to the manual inspection methods mentioned above, drones can also be used for inspection, but due to factors such as battery life and other stability issues, the efficiency is low and the results are not good. Utility Model Content

[0004] The purpose of this invention is to provide a lightweight, long-span bridge beam bottom inspection system. By building a suspension walking platform on the bottom of the beam, it achieves unmanned inspection and has the advantages of being lightweight, low-cost, and highly reliable.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a lightweight, long-span bridge beam bottom inspection system, comprising:

[0006] A bridge deck walking device, comprising four devices, each having a horizontally movable cantilever, an end of which has a vertically movable suspended ladder, and an installation platform at the end of the suspended ladder.

[0007] Two radial cables are provided, with their two ends respectively connected to the mounting platforms of two bridge deck walking devices located on the same side of the bridge deck.

[0008] Two radial traveling devices are provided, and each is movably mounted on its corresponding radial cable.

[0009] A latitudinal cable is provided, with each end of the latitudinal cable connected to a corresponding radial travel device.

[0010] A latitudinal walking device is provided, and is movably mounted on the latitudinal cable;

[0011] A detection camera is installed on the latitudinal walking device.

[0012] Furthermore, a winch is provided on the installation platform, and the end of the radial cable is connected to the traction rope of the winch.

[0013] Furthermore, the radial travel device includes:

[0014] Radial travel frame;

[0015] The upper radial travel wheel has two parts, which are respectively located at the front and rear ends of the radial travel frame;

[0016] A lower radial travel wheel is provided, and the lower radial travel wheel is located in the middle of the radial travel frame;

[0017] A radial travel motor is mounted on the radial travel frame and drives the lower radial travel wheel through a radial travel gear mechanism;

[0018] A connecting ring is disposed on the radial travel frame and connected to the end of the latitudinal cable.

[0019] Furthermore, the radial travel gear mechanism includes:

[0020] A radial travel drive gear is mounted on the main shaft of the radial travel motor.

[0021] A radial travel intermediate gear is mounted on the radial travel frame;

[0022] A radially traveling driven gear is mounted on the lower radially traveling wheel; the radially traveling driving gear, the radially traveling intermediate gear, and the radially traveling driven gear mesh in sequence.

[0023] Furthermore, the lateral walking device includes:

[0024] latitudinal traveling frame;

[0025] The upper latitudinal traveling wheel has two wheels, which are respectively located at the front and rear ends of the latitudinal traveling frame;

[0026] A lower latitudinal traveling wheel is provided, and is located in the middle of the latitudinal traveling frame;

[0027] A lateral travel motor is mounted on the lateral travel frame and drives the lower lateral travel wheel through a lateral travel gear mechanism;

[0028] A counterweight frame, which is suspended and mounted on the latitudinal traveling frame;

[0029] A counterweight, which is mounted on the counterweight frame.

[0030] Furthermore, the lateral travel gear mechanism includes:

[0031] A lateral travel drive gear, which is mounted on the main shaft of the lateral travel motor;

[0032] A latitudinal travel intermediate gear, which is mounted on the latitudinal travel frame;

[0033] A lateral travel driven gear is mounted on the lower lateral travel wheel; the lateral travel driving gear, the lateral travel intermediate gear, and the lateral travel driven gear mesh in sequence.

[0034] Compared with the prior art, the beneficial effects of this utility model are: This utility model uses latitudinal and radial cables to build an unmanned equipment walking platform on the bottom of the beam, which greatly reduces the load on the bridge deck walking device. By using latitudinal cables and latitudinal walking devices to replace trusses and manual inspection, the entire system can be made lighter, reducing system costs and improving safety and reliability. Attached Figure Description

[0035] Figure 1 This is a top-view perspective view of a preferred embodiment of the present invention.

[0036] Figure 2 for Figure 1 The illustrated embodiment is a three-dimensional structural view from a low-angle perspective;

[0037] Figure 3 for Figure 1 A front view of the embodiment shown;

[0038] Figure 4 for Figure 1 A three-dimensional view of the bridge deck walking device in the illustrated embodiment;

[0039] Figure 5 for Figure 1 The illustrated embodiment shows a structural side view of the bridge deck walking device;

[0040] Figure 6 for Figure 5 Sectional view along the middle AA direction;

[0041] Figure 7 for Figure 1 A three-dimensional view of the radial travel device in the illustrated embodiment;

[0042] Figure 8 for Figure 1 The illustrated embodiment shows a side view of the radial travel device.

[0043] Figure 9 for Figure 8 Sectional view along the BB direction;

[0044] Figure 10 for Figure 1 The diagram shows a three-dimensional view of the latitudinal walking device in the embodiment shown.

[0045] Figure 11 for Figure 1 The side view of the latitudinal walking device in the embodiment shown;

[0046] Figure 12 for Figure 11 A cross-sectional view along the CC direction;

[0047] Figure 13 A schematic diagram illustrating the working principle of this utility model.

[0048] Reference numerals: 1. Bridge deck traveling device; 2. Radial cable; 3. Radial traveling device; 4. Twisting cable; 5. Twisting traveling device; 6. Detection camera; 7. Vehicle body; 8. Mounting frame; 9. Cantilever; 10. Horizontal drive motor; 11. Suspension ladder; 12. Vertical winch; 13. Mounting platform; 14. Wheel; 15. Hydraulic outrigger; 16. Traction beam; 17. Roller; 18. Fixed pulley; 19. Horizontal drive gear; 20. Horizontal drive rack; 21. Radial traveling frame; 22. Upper 23. Radial travel wheel; 24. Lower radial travel wheel; 25. Radial travel motor; 26. Connecting ring; 27. Rope winch; 28. Radial travel drive gear; 29. ​​Radial travel intermediate gear; 30. Radial travel driven gear; 31. Weft travel frame; 32. Upper weft travel wheel; 33. Lower weft travel wheel; 34. Weft travel motor; 35. Counterweight frame; 36. Counterweight block; 37. Weft travel drive gear; 38. Weft travel intermediate gear; 39. Weft travel driven gear. Detailed Implementation

[0049] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0050] like Figures 1 to 12 As shown, this utility model provides a lightweight, long-span bridge beam bottom inspection system, including a bridge deck walking device 1, a radial cable 2, a radial walking device 3, a latitudinal cable 4, a latitudinal walking device 5, and an inspection camera 6. In this utility model, radial refers to the direction parallel to the length of the bridge, and latitudinal refers to the direction parallel to the width of the bridge.

[0051] like Figures 4 to 6 As shown, four bridge deck walking devices 1 are provided, which are arranged at certain intervals on the left and right sides of the bridge deck during maintenance. The bridge deck walking device 1 can be a work vehicle with autonomous walking function, such as the existing large bridge inspection vehicle, or a light bridge inspection vehicle towed by a motor vehicle. Taking the latter as an example, specifically, the bridge deck walking device 1 includes a vehicle body 7, a mounting frame 8, a cantilever 9, a horizontal drive motor 10, a suspension ladder 11, a vertical winch 12, and a mounting platform 13.

[0052] Wheels 14 are mounted at the rear of the vehicle body 7, and hydraulic outriggers 15 are mounted at the front. A traction beam 16 is also installed at the front of the vehicle body 7 for connection to a towing vehicle. A mounting frame 8 is installed at the center of the top of the vehicle body 7, with multiple sets of rollers 17 mounted on its front and rear sides, and fixed pulleys 18 mounted on its top surface. The cantilever 9 is mounted horizontally on top of the mounting frame 8 and forms a horizontal rolling connection through the rollers 17, allowing the cantilever 9 to move left and right horizontally. A horizontal drive motor 10 is mounted on top of the mounting frame 8, with a horizontal drive gear 19 mounted on its main shaft. A horizontal drive rack 20 is mounted on the cantilever 9, and the horizontal drive rack 20 meshes with the horizontal drive gear 19. The horizontal drive motor 10 drives the cantilever 9 to reciprocate, completing the extension and retraction operations.

[0053] A vertical winch 12 is installed at the right end of the cantilever 9. The left end of the cantilever 9 is also equipped with multiple sets of rollers 17 and a fixed pulley 18. The suspended ladder 11 is installed vertically at the left end of the cantilever 9 and forms a horizontal rolling connection through the rollers 17, allowing the suspended ladder 11 to move vertically up and down. An installation platform 13 is installed at the bottom of the suspended ladder 11. The suspended ladder 11 serves to allow personnel to move back and forth between the bridge deck and the installation platform 13. The traction rope pulled out by the vertical winch 12 passes through the fixed pulley 18 and then hooks onto the bottom horizontal bar of the suspended ladder 11 via a hook at its end, thus forming a connection. The vertical winch 12 drives the suspended ladder 11 to move back and forth, completing the lowering and raising operations.

[0054] A cable winch 26 is installed on the mounting platform 13 to connect the radial cable and straighten it by traction. Obviously, after the cantilever 9 extends, the overall center of gravity will shift to the left. Therefore, to prevent tipping to one side, cement blocks can be stacked on the vehicle body 7 as counterweight to improve overall stability. It should be noted that the bridge deck traveling device 1 includes electrical equipment, such as winches, motors, and hydraulic stations, and therefore necessarily includes controllers for controlling such equipment, as well as a power supply for it. The control principle and process are well-known technologies; for example, patent application number CN2013105389628 discloses the control methods and electrical connection methods of the above-mentioned electrical equipment, which will not be elaborated further.

[0055] Two radial cables 2 are provided, with their two ends respectively connected to the mounting platforms 13 of two bridge deck traveling devices 1 located on the same side of the bridge deck. The ends of the radial cables form locking rings through cable locking devices, thereby connecting to the hooks of the retractable winch.

[0056] Two radial traveling devices 3 are provided, each movably mounted on its corresponding radial cable. For example... Figures 7 to 9 As shown, specifically, the radial travel device 3 includes a radial travel frame 21, an upper radial travel wheel 22, a lower radial travel wheel 23, a radial travel motor 24, and a connecting ring 25.

[0057] The radial travel frame 21 is an inverted triangular structure, formed by connecting two rounded inverted triangular plates. One upper radial travel wheel 22 is mounted on the radial travel frame 21, one at the front and one at the rear. One lower radial travel wheel 23 is provided, located in the middle of the radial travel frame 21. Both the upper radial travel wheel 22 and the lower radial travel wheel 23 are grooved wheels, and the radial cable passes through their grooves in a straight line.

[0058] A radial travel motor 24 is mounted on a radial travel frame 21 and drives the lower radial travel wheel 23 via a radial travel gear mechanism. Specifically, the radial travel gear mechanism includes a radial travel drive gear 27, a radial travel intermediate gear 28, and a radial travel driven gear 29. The radial travel drive gear 27 is mounted on the main shaft of the radial travel motor 24; the radial travel intermediate gear 28 is mounted on the radial travel frame 21; and the radial travel driven gear 29 is mounted on the lower radial travel wheel 23. The radial travel drive gear 27, the radial travel intermediate gear 28, and the radial travel driven gear 29 mesh sequentially. The transmission ratio of the radial travel gear mechanism is 5:1, thereby reducing the motor speed and providing greater power. A connecting ring 25 is disposed on the radial travel frame 21 and connected to the end of the weft cable 4.

[0059] It should be noted that the two radial traveling devices 3 should move synchronously, powered either by their own power supply or by connecting to the power supply of the bridge deck traveling device 1 via electrical wires. For the inspection of long-span bridges, where the distance is relatively long, self-contained power supply is preferred. Similarly, this traveling device is also controlled by a controller with remote control function, and its control method and principle are existing technologies, so they will not be described in detail.

[0060] A latitudinal cable 4 is provided, and its two ends are also connected to the connecting rings 25 on the corresponding radial travel device 3 by the locking device.

[0061] A lateral traveling device 5 is provided, which is movably mounted on the lateral cable 4. For example... Figures 10 to 12As shown, specifically, the latitudinal traveling device 5 includes a latitudinal traveling frame 30, an upper latitudinal traveling wheel 31, a lower latitudinal traveling wheel 32, a latitudinal traveling motor 33, a counterweight frame 34, and a counterweight block 35. The latitudinal traveling device 5 has a basically the same structure and principle as the radial traveling device 3.

[0062] One upper weft-direction traveling wheel 31 is mounted at the front and one at the rear of the weft-direction traveling frame 30. One lower weft-direction traveling wheel 32 is provided and located in the middle of the weft-direction traveling frame 30. A weft-direction traveling motor 33 is mounted on the weft-direction traveling frame 30 and drives the lower weft-direction traveling wheel 32 via a weft-direction traveling gear mechanism.

[0063] Specifically, the lateral travel gear mechanism includes a lateral travel drive gear 36, a lateral travel intermediate gear 37, and a lateral travel driven gear 38.

[0064] The lateral travel drive gear 36 is mounted on the main shaft of the lateral travel motor 33; the lateral travel intermediate gear 37 is mounted on the lateral travel frame 30; and the lateral travel driven gear 38 is mounted on the lower lateral travel wheel 32. The lateral travel drive gear 36, the lateral travel intermediate gear 37, and the lateral travel driven gear 38 mesh sequentially. The lateral travel gear mechanism also has a high transmission ratio, thereby improving power output.

[0065] The counterweight frame 34 is suspended on the latitudinal travel frame 30. The counterweight block 35 is mounted on the counterweight frame 34. Since the latitudinal travel device 5 travels independently on the latitudinal cable 4, its stability can be improved by adding additional components to prevent excessive swaying that could affect detection. Because the latitudinal travel device 5 can also be powered by its own power supply, the power supply itself can also be used as a counterweight. A high-capacity lithium battery is used as the power supply, and the total weight of the counterweight is kept below 20 kg.

[0066] The inspection camera 6 is installed on the latitudinal traveling device 5. The inspection camera 6 is an MV-CS200-10UC color industrial camera with 20 megapixels, a maximum frame rate of 19.2fps, and both PWR and Ethernet interfaces. Clearly, the inspection camera 6 transmits wireless signals to the controller of the bridge deck traveling device 1 via the controller on the latitudinal traveling device 5, thus facilitating real-time image acquisition by personnel. It should be noted that the travel distance of the radial traveling device 3 each time is determined based on the detection range covered by the image acquired by the inspection camera 6, i.e., the detection range is length × width = L × W, where the length direction is consistent with the length direction of the bridge. Therefore, the travel distance L of the radial traveling device 3 each time is... 经 =L. If the total travel distance of the radial traveling device 3 is S... 经 Then, the number of stops n of the radial traveling device 3 can be determined based on S and L. If the distance traveled by the lateral traveling device 5 each time is L... 纬Then its total walking distance S 纬 =n×L 纬 Based on the distance and load mentioned above, the capacity of the backup power supply for both devices can be determined.

[0067] The working process and principle of this utility model:

[0068] like Figure 13 As shown, the bridge deck traveling device 1 is moved to the corresponding position on the bridge deck according to the bridge span. Then, the installation platform 13 is lowered to a certain height so that the cable winch 26 is below the bottom of the beam. The hook of the cable winch 26 is then lowered to a certain height above the water surface, ensuring it does not touch the water but is still accessible to personnel on the water. Personnel on the water maneuver a workboat to one of the lifting points and connect one end of the radial cable 2 to the hook, then move to the other end and complete the connection of the other end of the radial cable 2. During this process, one of the radial traveling devices 3 is installed onto the radial cable 2. Following these steps, both radial cables 2 and radial traveling devices 3 are in place.

[0069] The surface personnel then return to the location of one of the radial travel devices 3, connect one end of the latitudinal cable 4 to that radial travel device 3, and then move to the location of another radial travel device 3 to connect the other end of the latitudinal cable 4 to the other radial travel device 3. During this process, the latitudinal travel device 5 is installed on the latitudinal cable 4.

[0070] After the above operations are completed, the cable retraction winch 26 is started to retract the traction rope. As the traction rope is fully retracted, the radial cable is pulled until it is nearly horizontal. At this time, the radial travel device 3 starts to travel from one end, pausing after traveling a certain distance to allow the lateral travel device 5 to move from one side of the bridge bottom to the other side, completing the width direction detection. Then the radial travel device 3 continues to travel a certain distance, and the lateral travel device 5 travels in the opposite direction. This process is repeated to achieve unmanned detection of the beam bottom. Throughout the entire process, the staff are on the ground or on a boat, eliminating the need for high-altitude operations as in traditional methods, greatly improving safety. Furthermore, by eliminating the truss structure at the beam bottom and replacing it with the lateral cable 4, a lightweight design is achieved, significantly reducing costs and making installation easier.

[0071] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0072] It should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A lightweight large-span bridge beam bottom detection system, characterized in that: include: Bridge deck walking device (1), the bridge deck walking device (1) is provided with four, each having a horizontally movable cantilever (9), the end of the cantilever having a vertically movable suspension ladder (11), the end of the suspension ladder (11) being provided with an installation platform (13). Radial cable (2), two radial cables (2) are provided, and their two ends are respectively connected to the installation platforms (13) of two bridge deck walking devices (1) located on the same side of the bridge deck; Radial travel device (3), two radial travel devices (3) are provided, and each is movably mounted on the corresponding radial cable; A latitudinal cable (4) is provided, and its two ends are respectively connected to the corresponding radial travel device (3); A latitudinal walking device (5) is provided, and is movably mounted on the latitudinal cable (4); A detection camera (6) is installed on the latitudinal walking device (5).

2. The lightweight large-span bridge beam bottom detection system according to claim 1, characterized in that: A winch is provided on the installation platform (13), and the end of the radial cable is connected to the traction rope of the winch.

3. The lightweight large-span bridge beam bottom detection system according to claim 1, characterized in that: The radial travel device (3) includes: Radial travel frame (21); There are two upper radial travel wheels (22), which are respectively located at the front and rear ends of the radial travel frame (21); A lower radial travel wheel (23) is provided, and is located in the middle of the radial travel frame (21); A radial travel motor (24) is mounted on the radial travel frame (21) and drives the lower radial travel wheel (23) through a radial travel gear mechanism. A connecting ring (25) is disposed on the radial travel frame (21) and connected to the end of the weft cable (4).

4. The lightweight large-span bridge beam bottom detection system according to claim 3, characterized in that: The radial travel gear mechanism includes: Radial travel drive gear (27), which is mounted on the main shaft of the radial travel motor (24); Radial travel intermediate gear (28), which is mounted on the radial travel frame (21); Radial travel driven gear (29) is mounted on the lower radial travel wheel (23); the radial travel driving gear (27), the radial travel intermediate gear (28) and the radial travel driven gear (29) mesh in sequence.

5. The lightweight large-span bridge beam bottom detection system according to claim 4, characterized in that: The lateral walking device (5) includes: Latitudinal traveling frame (30); There are two upper latitudinal traveling wheels (31), which are respectively located at the front and rear ends of the latitudinal traveling frame (30); A lower latitudinal traveling wheel (32) is provided, and is located in the middle of the latitudinal traveling frame (30); A weft-direction walking motor (33) is mounted on the weft-direction walking frame (30) and drives the lower weft-direction walking wheel (32) through a weft-direction walking gear mechanism. A counterweight frame (34) is suspended on the lateral travel frame (30); Counterweight (35), which is mounted on the counterweight frame (34).

6. The lightweight large-span bridge beam bottom detection system according to claim 5, characterized in that: The lateral travel gear mechanism includes: A lateral travel drive gear (36) is mounted on the main shaft of the lateral travel motor (33); A lateral travel intermediate gear (37) is mounted on the lateral travel frame (30); The lateral travel driven gear (38) is mounted on the lower lateral travel wheel (32); the lateral travel driving gear (36), the lateral travel intermediate gear (37) and the lateral travel driven gear (38) mesh in sequence.

Images